toybox: toys/pending/dhcpd.c annotate

annotate toys/pending/dhcpd.c @ 1265:0ecfaa7022e8 draft

usage: is lower case (the help generator looks for that, might as well be consistent).

author	Rob Landley <rob@landley.net>
date	Wed, 23 Apr 2014 08:37:07 -0500
parents	e11684e3bbc5
children	6a06541c090c

rev	line source
1005 03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1 /* dhcpd.c - DHCP server for dynamic network configuration.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	2 *
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	3 * Copyright 2013 Madhur Verma <mad.flexi@gmail.com>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	4 * Copyright 2013 Kyungwan Han <asura321@gamil.com>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	5 *
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	6 * No Standard
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	7 USE_DHCPD(NEWTOY(dhcpd, ">1P#<0>65535=67fS", TOYFLAG_SBIN\|TOYFLAG_ROOTONLY))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	8
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	9 config DHCPD
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	10 bool "dhcpd"
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	11 default n
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	12 help
1265 0ecfaa7022e8 usage: is lower case (the help generator looks for that, might as well be consistent). Rob Landley <rob@landley.net> parents: 1104 diff changeset	13 usage: dhcpd [-fS] [-P N] [CONFFILE]
1005 03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	14
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	15 -f Run in foreground
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	16 -S Log to syslog too
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	17 -P N Use port N (default 67)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	18
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	19 config DEBUG_DHCP
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	20 bool "debugging messeges ON/OFF"
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	21 default n
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	22 depends on DHCPD
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	23 */
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	24
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	25 #define FOR_dhcpd
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	26
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	27 #include "toys.h"
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	28 #include <linux/sockios.h>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	29 #include <linux/if_ether.h>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	30
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	31 // Todo: headers not in posix
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	32 #include <netinet/ip.h>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	33 #include <netinet/udp.h>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	34 #include <netpacket/packet.h>
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	35
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	36 #if CFG_DEBUG_DHCP==1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	37 # define dbg(fmt, arg...) printf(fmt, ##arg)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	38 #else
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	39 # define dbg(fmt, arg...)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	40 #endif
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	41
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	42 #define flag_get(f,v,d) ((toys.optflags & (f)) ? (v) : (d))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	43 #define flag_chk(f) ((toys.optflags & (f)) ? 1 : 0)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	44
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	45 #define LOG_SILENT 0x0
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	46 #define LOG_CONSOLE 0x1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	47 #define LOG_SYSTEM 0x2
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	48
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	49 #define DHCP_MAGIC 0x63825363
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	50
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	51 #define DHCPDISCOVER 1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	52 #define DHCPOFFER 2
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	53 #define DHCPREQUEST 3
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	54 #define DHCPDECLINE 4
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	55 #define DHCPACK 5
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	56 #define DHCPNAK 6
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	57 #define DHCPRELEASE 7
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	58 #define DHCPINFORM 8
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	59
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	60 #define DHCP_NUM8 (1<<8)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	61 #define DHCP_NUM16 (1<<9)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	62 #define DHCP_NUM32 DHCP_NUM16 \| DHCP_NUM8
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	63 #define DHCP_STRING (1<<10)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	64 #define DHCP_STRLST (1<<11)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	65 #define DHCP_IP (1<<12)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	66 #define DHCP_IPLIST (1<<13)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	67 #define DHCP_IPPLST (1<<14)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	68 #define DHCP_STCRTS (1<<15)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	69
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	70 // DHCP option codes (partial list). See RFC 2132 and
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	71 #define DHCP_OPT_PADDING 0x00
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	72 #define DHCP_OPT_HOST_NAME DHCP_STRING \| 0x0c // either client informs server or server gives name to client
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	73 #define DHCP_OPT_REQUESTED_IP DHCP_IP \| 0x32 // sent by client if specific IP is wanted
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	74 #define DHCP_OPT_LEASE_TIME DHCP_NUM32 \| 0x33
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	75 #define DHCP_OPT_OPTION_OVERLOAD 0x34
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	76 #define DHCP_OPT_MESSAGE_TYPE DHCP_NUM8 \| 0x35
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	77 #define DHCP_OPT_SERVER_ID DHCP_IP \| 0x36 // by default server's IP
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	78 #define DHCP_OPT_PARAM_REQ DHCP_STRING \| 0x37 // list of options client wants
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	79 #define DHCP_OPT_END 0xff
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	80
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	81 GLOBALS(
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	82 long port;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	83 );
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	84
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	85 typedef struct __attribute__((packed)) dhcp_msg_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	86 uint8_t op;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	87 uint8_t htype;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	88 uint8_t hlen;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	89 uint8_t hops;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	90 uint32_t xid;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	91 uint16_t secs;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	92 uint16_t flags;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	93 uint32_t ciaddr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	94 uint32_t yiaddr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	95 uint32_t nsiaddr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	96 uint32_t ngiaddr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	97 uint8_t chaddr[16];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	98 uint8_t sname[64];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	99 uint8_t file[128];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	100 uint32_t cookie;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	101 uint8_t options[308];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	102 } dhcp_msg_t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	103
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	104 typedef struct __attribute__((packed)) dhcp_raw_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	105 struct iphdr iph;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	106 struct udphdr udph;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	107 dhcp_msg_t dhcp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	108 } dhcp_raw_t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	109
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	110 typedef struct static_lease_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	111 struct static_lease_s *next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	112 uint32_t nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	113 int mac[6];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	114 } static_lease;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	115
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	116 typedef struct {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	117 uint32_t expires;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	118 uint32_t lease_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	119 uint8_t lease_mac[6];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	120 char hostname[20];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	121 uint8_t pad[2];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	122 } dyn_lease;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	123
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	124 typedef struct option_val_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	125 char *key;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	126 uint16_t code;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	127 void *val;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	128 size_t len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	129 } option_val_t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	130
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	131 typedef struct __attribute__((__may_alias__)) server_config_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	132 char *interface; // interface to use
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	133 int ifindex;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	134 uint32_t server_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	135 uint32_t port;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	136 uint8_t server_mac[6]; // our MAC address (used only for ARP probing)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	137 void *options[256]; // list of DHCP options loaded from the config file
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	138 /* start,end are in host order: we need to compare start <= ip <= end*/
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	139 uint32_t start_ip; // start address of leases, in host order
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	140 uint32_t end_ip; // end of leases, in host order
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	141 uint32_t max_lease_sec; // maximum lease time (host order)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	142 uint32_t min_lease_sec; // minimum lease time a client can request
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	143 uint32_t max_leases; // maximum number of leases (including reserved addresses)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	144 uint32_t auto_time; // how long should dhcpd wait before writing a config file.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	145 // if this is zero, it will only write one on SIGUSR1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	146 uint32_t decline_time; // how long an address is reserved if a client returns a
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	147 // decline message
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	148 uint32_t conflict_time; // how long an arp conflict offender is leased for
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	149 uint32_t offer_time; // how long an offered address is reserved
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	150 uint32_t siaddr_nip; // "next server" bootp option
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	151 char *lease_file;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	152 char *pidfile;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	153 char *notify_file; // what to run whenever leases are written
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	154 char *sname; // bootp server name
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	155 char *boot_file; // bootp boot file option
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	156 struct static_lease *static_leases; // List of ip/mac pairs to assign static leases
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	157 } server_config_t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	158
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	159 typedef struct __attribute__((__may_alias__)) server_state_s {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	160 uint8_t rqcode;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	161 int listensock;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	162 dhcp_msg_t rcvd_pkt;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	163 uint8_t* rqopt;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	164 dhcp_msg_t send_pkt;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	165 static_lease *sleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	166 struct arg_list *dleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	167 } server_state_t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	168
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	169 struct config_keyword {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	170 char *keyword;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	171 int (handler)(const char str, void *var);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	172 void *var;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	173 char *def;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	174 };
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	175
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	176 static option_val_t options_list[] = {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	177 {"lease" , DHCP_NUM32 \| 0x33, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	178 {"subnet" , DHCP_IP \| 0x01, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	179 {"broadcast" , DHCP_IP \| 0x1c, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	180 {"router" , DHCP_IP \| 0x03, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	181 {"ipttl" , DHCP_NUM8 \| 0x17, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	182 {"mtu" , DHCP_NUM16 \| 0x1a, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	183 {"hostname" , DHCP_STRING \| 0x0c, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	184 {"domain" , DHCP_STRING \| 0x0f, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	185 {"search" , DHCP_STRLST \| 0x77, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	186 {"nisdomain" , DHCP_STRING \| 0x28, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	187 {"timezone" , DHCP_NUM32 \| 0x02, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	188 {"tftp" , DHCP_STRING \| 0x42, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	189 {"bootfile" , DHCP_STRING \| 0x43, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	190 {"bootsize" , DHCP_NUM16 \| 0x0d, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	191 {"rootpath" , DHCP_STRING \| 0x11, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	192 {"wpad" , DHCP_STRING \| 0xfc, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	193 {"serverid" , DHCP_IP \| 0x36, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	194 {"message" , DHCP_STRING \| 0x38, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	195 {"vlanid" , DHCP_NUM32 \| 0x84, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	196 {"vlanpriority" , DHCP_NUM32 \| 0x85, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	197 {"dns" , DHCP_IPLIST \| 0x06, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	198 {"wins" , DHCP_IPLIST \| 0x2c, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	199 {"nissrv" , DHCP_IPLIST \| 0x29, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	200 {"ntpsrv" , DHCP_IPLIST \| 0x2a, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	201 {"lprsrv" , DHCP_IPLIST \| 0x09, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	202 {"swapsrv" , DHCP_IP \| 0x10, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	203 {"routes" , DHCP_STCRTS \| 0x21, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	204 {"staticroutes" , DHCP_STCRTS \| 0x79, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	205 {"msstaticroutes" , DHCP_STCRTS \| 0xf9, NULL, 0},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	206 };
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	207
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	208 struct fd_pair { int rd; int wr; };
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	209 static server_config_t gconfig;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	210 static server_state_t gstate;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	211 static uint8_t infomode;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	212 static struct fd_pair sigfd;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	213 static int constone = 1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	214
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	215 // calculate options size.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	216 static int dhcp_opt_size(uint8_t *optionptr)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	217 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	218 int i = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	219 for(;optionptr[i] != 0xff; i++) if(optionptr[i] != 0x00) i += optionptr[i + 1] + 2 -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	220 return i;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	221 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	222
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	223 // calculates checksum for dhcp messeges.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	224 static uint16_t dhcp_checksum(void *addr, int count)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	225 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	226 int32_t sum = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	227 uint16_t tmp = 0, source = (uint16_t )addr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	228
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	229 while (count > 1) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	230 sum += *source++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	231 count -= 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	232 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	233 if (count > 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	234 (uint8_t)&tmp = (uint8_t)source;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	235 sum += tmp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	236 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	237 while (sum >> 16) sum = (sum & 0xffff) + (sum >> 16);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	238 return ~sum;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	239 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	240
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	241 // gets information of INTERFACE and updates IFINDEX, MAC and IP
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	242 static int get_interface(const char interface, int ifindex, uint32_t oip, uint8_t mac)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	243 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	244 struct ifreq req;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	245 struct sockaddr_in *ip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	246 int fd = xsocket(AF_INET, SOCK_RAW, IPPROTO_RAW);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	247
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	248 req.ifr_addr.sa_family = AF_INET;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	249 strncpy(req.ifr_name, interface, IFNAMSIZ);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	250 req.ifr_name[IFNAMSIZ-1] = '\0';
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	251
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	252 xioctl(fd, SIOCGIFFLAGS, &req);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	253
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	254 if (!(req.ifr_flags & IFF_UP)) return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	255 if (oip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	256 xioctl(fd, SIOCGIFADDR, &req);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	257 ip = (struct sockaddr_in*) &req.ifr_addr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	258 dbg("IP %s\n", inet_ntoa(ip->sin_addr));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	259 *oip = ntohl(ip->sin_addr.s_addr);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	260 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	261 if (ifindex) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	262 xioctl(fd, SIOCGIFINDEX, &req);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	263 dbg("Adapter index %d\n", req.ifr_ifindex);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	264 *ifindex = req.ifr_ifindex;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	265 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	266 if (mac) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	267 xioctl(fd, SIOCGIFHWADDR, &req);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	268 memcpy(mac, req.ifr_hwaddr.sa_data, 6);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	269 dbg("MAC %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	270 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	271 close(fd);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	272 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	273 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	274
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	275 /*
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	276 *logs messeges to syslog or console
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	277 *opening the log is still left with applet.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	278 *FIXME: move to more relevent lib. probably libc.c
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	279 */
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	280 static void infomsg(uint8_t infomode, char *s, ...)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	281 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	282 int used;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	283 char *msg;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	284 va_list p, t;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	285
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	286 if (infomode == LOG_SILENT) return;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	287 va_start(p, s);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	288 va_copy(t, p);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	289 used = vsnprintf(NULL, 0, s, t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	290 used++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	291 va_end(t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	292
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	293 msg = xmalloc(used);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	294 vsnprintf(msg, used, s, p);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	295 va_end(p);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	296
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	297 if (infomode & LOG_SYSTEM) syslog(LOG_INFO, "%s", msg);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	298 if (infomode & LOG_CONSOLE) printf("%s\n", msg);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	299 free(msg);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	300 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	301
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	302 /*
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	303 * Writes self PID in file PATH
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	304 * FIXME: libc implementation only writes in /var/run
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	305 * this is more generic as some implemenation may provide
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	306 * arguments to write in specific file. as dhcpd does.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	307 */
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	308 static void write_pid(char *path)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	309 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	310 int pidfile = open(path, O_CREAT \| O_WRONLY \| O_TRUNC, 0666);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	311 if (pidfile > 0) {
1041 d3f9e55e350a Convert dhcp/dhcpd from utoa() to sprintf(). Rob Landley <rob@landley.net> parents: 1005 diff changeset	312 char pidbuf[12];
d3f9e55e350a Convert dhcp/dhcpd from utoa() to sprintf(). Rob Landley <rob@landley.net> parents: 1005 diff changeset	313
d3f9e55e350a Convert dhcp/dhcpd from utoa() to sprintf(). Rob Landley <rob@landley.net> parents: 1005 diff changeset	314 sprintf(pidbuf, "%u", (unsigned)getpid());
1005 03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	315 write(pidfile, pidbuf, strlen(pidbuf));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	316 close(pidfile);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	317 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	318 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	319
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	320 // Generic signal handler real handling is done in main funcrion.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	321 static void signal_handler(int sig)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	322 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	323 unsigned char ch = sig;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	324 if (write(sigfd.wr, &ch, 1) != 1) dbg("can't send signal\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	325 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	326
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	327 // signal setup for SIGUSR1 SIGTERM
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	328 static int setup_signal()
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	329 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	330 if (pipe((int *)&sigfd) < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	331 dbg("signal pipe failed\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	332 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	333 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	334 fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	335 fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	336 int flags = fcntl(sigfd.wr, F_GETFL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	337 fcntl(sigfd.wr, F_SETFL, flags \| O_NONBLOCK);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	338 signal(SIGUSR1, signal_handler);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	339 signal(SIGTERM, signal_handler);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	340 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	341 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	342
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	343 // String STR to UINT32 conversion strored in VAR
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	344 static int strtou32(const char str, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	345 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	346 char *endptr = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	347 int base = 10;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	348 errno=0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	349 ((uint32_t)(var)) = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	350 if (str[0]=='0' && (str[1]=='x' \|\| str[1]=='X')) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	351 base = 16;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	352 str+=2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	353 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	354 long ret_val = strtol(str, &endptr, base);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	355 if (errno) infomsg(infomode, "config : Invalid num %s",str);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	356 else if (endptr && (*endptr!='\0'\|\|endptr == str))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	357 infomsg(infomode, "config : Not a valid num %s",str);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	358 else ((uint32_t)(var)) = (uint32_t)ret_val;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	359 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	360 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	361
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	362 // copy string STR in variable VAR
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	363 static int strinvar(const char str, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	364 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	365 char **dest = var;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	366 if (dest) free(dest);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	367 *dest = strdup(str);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	368 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	369 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	370
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	371 // IP String STR to binary data.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	372 static int striptovar(const char str, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	373 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	374 in_addr_t addr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	375 ((uint32_t)(var)) = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	376 if(!str) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	377 error_msg("config : NULL address string \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	378 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	379 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	380 if((addr = inet_addr(str)) == -1) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	381 error_msg("config : wrong address %s \n",str );
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	382 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	383 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	384 ((uint32_t)(var)) = (uint32_t)addr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	385 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	386 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	387
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	388 // String to dhcp option conversion
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	389 static int strtoopt(const char str, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	390 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	391 char option, valstr, grp, tp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	392 uint32_t optcode = 0, inf = infomode, convtmp, mask, nip, router;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	393 uint16_t flag = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	394 int count, size = ARRAY_LEN(options_list);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	395
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	396 if (!*str) return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	397 if (!(option = strtok((char*)str, " \t="))) return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	398
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	399 infomode = LOG_SILENT;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	400 strtou32(option, (uint32_t*)&optcode);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	401 infomode = inf;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	402
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	403 if (optcode > 0 && optcode < 256) { // raw option
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	404 for (count = 0; count < size; count++) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	405 if ((options_list[count].code & 0X00FF) == optcode) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	406 flag = (options_list[count].code & 0XFF00);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	407 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	408 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	409 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	410 } else { //string option
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	411 for (count = 0; count < size; count++) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	412 if (!strncmp(options_list[count].key, option, strlen(options_list[count].key))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	413 flag = (options_list[count].code & 0XFF00);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	414 optcode = (options_list[count].code & 0X00FF);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	415 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	416 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	417 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	418 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	419 if (count == size) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	420 infomsg(inf, "config : Obsolete OR Unknown Option : %s", option);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	421 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	422 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	423
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	424 if (!flag \|\| !optcode) return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	425
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	426 if (!(valstr = strtok(NULL, " \t"))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	427 dbg("config : option %s has no value defined.\n", option);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	428 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	429 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	430 dbg(" value : %-20s : ", valstr);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	431 switch (flag) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	432 case DHCP_NUM32:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	433 options_list[count].len = sizeof(uint32_t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	434 options_list[count].val = xmalloc(sizeof(uint32_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	435 strtou32(valstr, &convtmp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	436 memcpy(options_list[count].val, &convtmp, sizeof(uint32_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	437 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	438 case DHCP_NUM16:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	439 options_list[count].len = sizeof(uint16_t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	440 options_list[count].val = xmalloc(sizeof(uint16_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	441 strtou32(valstr, &convtmp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	442 memcpy(options_list[count].val, &convtmp, sizeof(uint16_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	443 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	444 case DHCP_NUM8:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	445 options_list[count].len = sizeof(uint8_t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	446 options_list[count].val = xmalloc(sizeof(uint8_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	447 strtou32(valstr, &convtmp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	448 memcpy(options_list[count].val, &convtmp, sizeof(uint8_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	449 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	450 case DHCP_IP:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	451 options_list[count].len = sizeof(uint32_t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	452 options_list[count].val = xmalloc(sizeof(uint32_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	453 striptovar(valstr, options_list[count].val);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	454 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	455 case DHCP_STRING:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	456 options_list[count].len = strlen(valstr);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	457 options_list[count].val = strdup(valstr);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	458 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	459 case DHCP_IPLIST:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	460 while(valstr){
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	461 options_list[count].val = xrealloc(options_list[count].val, options_list[count].len + sizeof(uint32_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	462 striptovar(valstr, ((uint8_t*)options_list[count].val)+options_list[count].len);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	463 options_list[count].len += sizeof(uint32_t);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	464 valstr = strtok(NULL," \t");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	465 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	466 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	467 case DHCP_IPPLST:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	468 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	469 case DHCP_STCRTS:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	470 /* Option binary format:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	471 * mask [one byte, 0..32]
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	472 * ip [0..4 bytes depending on mask]
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	473 * router [4 bytes]
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	474 * may be repeated
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	475 * staticroutes 10.0.0.0/8 10.127.0.1, 10.11.12.0/24 10.11.12.1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	476 */
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	477 grp = strtok(valstr, ",");;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	478 while(grp){
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	479 while(grp == ' ' \|\| grp == '\t') grp++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	480 tp = strchr(grp, '/');
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	481 if (!tp) error_exit("wrong formated static route option");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	482 *tp = '\0';
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	483 mask = strtol(++tp, &tp, 10);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	484 if (striptovar(grp, (uint8_t*)&nip)<0) error_exit("wrong formated static route option");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	485 while(tp == ' ' \|\| tp == '\t' \|\| *tp == '-') tp++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	486 if (striptovar(tp, (uint8_t*)&router)<0) error_exit("wrong formated static route option");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	487 options_list[count].val = xrealloc(options_list[count].val, options_list[count].len + 1 + mask/8 + 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	488 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &mask, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	489 options_list[count].len += 1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	490 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &nip, mask/8);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	491 options_list[count].len += mask/8;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	492 memcpy(((uint8_t*)options_list[count].val)+options_list[count].len, &router, 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	493 options_list[count].len += 4;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	494 tp = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	495 grp = strtok(NULL, ",");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	496 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	497 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	498 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	499 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	500 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	501
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	502 // Reads Static leases from STR and updates inner structures.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	503 static int get_staticlease(const char str, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	504 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	505 struct static_lease_s *sltmp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	506 char tkmac, tkip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	507 int count;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	508
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	509 if (!*str) return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	510
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	511 if (!(tkmac = strtok((char*)str, " \t"))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	512 infomsg(infomode, "config : static lease : mac not found");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	513 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	514 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	515 if (!(tkip = strtok(NULL, " \t"))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	516 infomsg(infomode, "config : static lease : no ip bind to mac %s", tkmac);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	517 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	518 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	519 sltmp = xzalloc(sizeof(struct static_lease_s));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	520 for (count = 0; count < 6; count++, tkmac++) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	521 errno = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	522 sltmp->mac[count] = strtol(tkmac, &tkmac, 16);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	523 if (sltmp->mac[count]>255 \|\| sltmp->mac[count]<0 \|\| (tkmac && tkmac!=':') \|\| errno) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	524 infomsg(infomode, "config : static lease : mac address wrong format");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	525 free(sltmp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	526 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	527 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	528 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	529 striptovar(tkip, &sltmp->nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	530 sltmp->next = gstate.sleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	531 gstate.sleases = sltmp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	532
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	533 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	534 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	535
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	536 static struct config_keyword keywords[] = {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	537 // keyword handler variable address default
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	538 {"start" , striptovar , (void*)&gconfig.start_ip , "192.168.0.20"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	539 {"end" , striptovar , (void*)&gconfig.end_ip , "192.168.0.254"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	540 {"interface" , strinvar , (void*)&gconfig.interface , "eth0"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	541 {"port" , strtou32 , (void*)&gconfig.port , "67"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	542 {"min_lease" , strtou32 , (void*)&gconfig.min_lease_sec, "60"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	543 {"max_leases" , strtou32 , (void*)&gconfig.max_leases , "235"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	544 {"auto_time" , strtou32 , (void*)&gconfig.auto_time , "7200"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	545 {"decline_time" , strtou32 , (void*)&gconfig.decline_time , "3600"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	546 {"conflict_time", strtou32 , (void*)&gconfig.conflict_time, "3600"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	547 {"offer_time" , strtou32 , (void*)&gconfig.offer_time , "60"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	548 {"lease_file" , strinvar , (void*)&gconfig.lease_file , "/var/lib/misc/dhcpd.leases"}, //LEASES_FILE
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	549 {"pidfile" , strinvar , (void*)&gconfig.pidfile , "/var/run/dhcpd.pid"}, //DPID_FILE
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	550 {"siaddr" , striptovar , (void*)&gconfig.siaddr_nip , "0.0.0.0"},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	551 {"option" , strtoopt , (void*)&gconfig.options , ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	552 {"opt" , strtoopt , (void*)&gconfig.options , ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	553 {"notify_file" , strinvar , (void*)&gconfig.notify_file , ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	554 {"sname" , strinvar , (void*)&gconfig.sname , ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	555 {"boot_file" , strinvar , (void*)&gconfig.boot_file , ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	556 {"static_lease" , get_staticlease , (void*)&gconfig.static_leases, ""},
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	557 };
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	558
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	559 // Parses the server config file and updates the global server config accordingly.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	560 static int parse_server_config(char config_file, struct config_keyword confkey)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	561 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	562 FILE *fs = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	563 char confline_temp = NULL,confline = NULL, tk = NULL, tokens[2] = {NULL, NULL};
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	564 int len, linelen, tcount, count, size = ARRAY_LEN(keywords);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	565
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	566 for (count = 0; count < size; count++)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	567 if (confkey[count].handler) confkey[count].handler(confkey[count].def, confkey[count].var);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	568
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	569 if (!(fs = fopen(config_file, "r"))) perror_msg("%s", config_file);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	570 for (len = 0, linelen = 0; fs;) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	571 len = getline(&confline_temp, (size_t*) &linelen, fs);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	572 confline = confline_temp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	573 if (len <= 0) break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	574 for (; *confline == ' '; confline++, len--);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	575 if ((confline[0] == '#') \|\| (confline[0] == '\n')) goto free_conf_continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	576 tk = strchr(confline, '#');
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	577 if (tk) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	578 for (; (tk-1)==' ' \|\| (tk-1)=='\t'; tk--);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	579 *tk = '\0';
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	580 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	581 tk = strchr(confline, '\n');
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	582 if (tk) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	583 for (; (tk-1)==' ' \|\| (tk-1)=='\t'; tk--);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	584 *tk = '\0';
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	585 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	586 for (tcount=0, tk=strtok(confline, " \t"); tk && (tcount < 2);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	587 tcount++, tk=strtok(NULL,(tcount==1)?"":" \t")) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	588 while ((tk == '\t') \|\| (tk == ' ')) tk++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	589 tokens[tcount] = xstrdup(tk);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	590 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	591 if (tcount<=1) goto free_tk0_continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	592 for (count = 0; count < size; count++) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	593 if (!strcmp(confkey[count].keyword,tokens[0])) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	594 dbg("got config : %15s : ", confkey[count].keyword);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	595 if (confkey[count].handler(tokens[1], confkey[count].var) == 0)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	596 dbg("%s \n", tokens[1]);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	597 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	598 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	599 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	600 if (tokens[1]) { free(tokens[1]); tokens[1] = NULL; }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	601 free_tk0_continue:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	602 if (tokens[0]) { free(tokens[0]); tokens[0] = NULL; }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	603 free_conf_continue:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	604 free(confline_temp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	605 confline_temp = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	606 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	607 if (fs) fclose(fs);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	608 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	609 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	610
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	611 // opens UDP socket for listen
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	612 static int open_listensock(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	613 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	614 struct sockaddr_in addr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	615 struct ifreq ifr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	616
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	617 if (gstate.listensock > 0) close(gstate.listensock);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	618
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	619 dbg("Opening listen socket on *:%d %s\n", gconfig.port, gconfig.interface);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	620 gstate.listensock = xsocket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	621 setsockopt(gstate.listensock, SOL_SOCKET, SO_REUSEADDR, &constone, sizeof(constone));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	622 if (setsockopt(gstate.listensock, SOL_SOCKET, SO_BROADCAST, &constone, sizeof(constone)) == -1) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	623 dbg("OPEN : brodcast ioctl failed.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	624 close(gstate.listensock);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	625 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	626 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	627 memset(&ifr, 0, sizeof(ifr));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	628 strncpy(ifr.ifr_name, gconfig.interface, IFNAMSIZ);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	629 ifr.ifr_name[IFNAMSIZ -1] = '\0';
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	630 setsockopt(gstate.listensock, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	631
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	632 memset(&addr, 0, sizeof(addr));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	633 addr.sin_family = AF_INET;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	634 addr.sin_port = (flag_chk(FLAG_P))?htons(TT.port):htons(67); //SERVER_PORT
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	635 addr.sin_addr.s_addr = INADDR_ANY ;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	636
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	637 if (bind(gstate.listensock, (struct sockaddr *) &addr, sizeof(addr))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	638 close(gstate.listensock);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	639 perror_exit("bind failed");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	640 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	641 dbg("OPEN : success\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	642 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	643 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	644
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	645 // Sends data through raw socket.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	646 static int send_packet(uint8_t broadcast)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	647 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	648 struct sockaddr_ll dest_sll;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	649 dhcp_raw_t packet;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	650 unsigned padding;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	651 int fd, result = -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	652 uint8_t bmacaddr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	653
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	654 memset(&packet, 0, sizeof(dhcp_raw_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	655 memcpy(&packet.dhcp, &gstate.send_pkt, sizeof(dhcp_msg_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	656
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	657 if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	658 dbg("SEND : socket failed\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	659 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	660 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	661 memset(&dest_sll, 0, sizeof(dest_sll));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	662 dest_sll.sll_family = AF_PACKET;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	663 dest_sll.sll_protocol = htons(ETH_P_IP);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	664 dest_sll.sll_ifindex = gconfig.ifindex;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	665 dest_sll.sll_halen = 6;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	666 memcpy(dest_sll.sll_addr, (broadcast)?bmacaddr:gstate.rcvd_pkt.chaddr , 6);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	667
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	668 if (bind(fd, (struct sockaddr *) &dest_sll, sizeof(dest_sll)) < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	669 dbg("SEND : bind failed\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	670 close(fd);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	671 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	672 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	673 padding = 308 - 1 - dhcp_opt_size(gstate.send_pkt.options);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	674 packet.iph.protocol = IPPROTO_UDP;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	675 packet.iph.saddr = gconfig.server_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	676 packet.iph.daddr = (broadcast \|\| (gstate.rcvd_pkt.ciaddr == 0))?INADDR_BROADCAST:gstate.rcvd_pkt.ciaddr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	677 packet.udph.source = htons(67);//SERVER_PORT
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	678 packet.udph.dest = htons(68); //CLIENT_PORT
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	679 packet.udph.len = htons(sizeof(dhcp_raw_t) - sizeof(struct iphdr) - padding);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	680 packet.iph.tot_len = packet.udph.len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	681 packet.udph.check = dhcp_checksum(&packet, sizeof(dhcp_raw_t) - padding);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	682 packet.iph.tot_len = htons(sizeof(dhcp_raw_t) - padding);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	683 packet.iph.ihl = sizeof(packet.iph) >> 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	684 packet.iph.version = IPVERSION;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	685 packet.iph.ttl = IPDEFTTL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	686 packet.iph.check = dhcp_checksum(&packet.iph, sizeof(packet.iph));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	687
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	688 result = sendto(fd, &packet, sizeof(dhcp_raw_t) - padding, 0,
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	689 (struct sockaddr *) &dest_sll, sizeof(dest_sll));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	690
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	691 dbg("sendto %d\n", result);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	692 close(fd);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	693 if (result < 0) dbg("PACKET send error\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	694 return result;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	695 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	696
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	697 // Reads from UDP socket
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	698 static int read_packet(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	699 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	700 int ret;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	701
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	702 memset(&gstate.rcvd_pkt, 0, sizeof(dhcp_msg_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	703 ret = read(gstate.listensock, &gstate.rcvd_pkt, sizeof(dhcp_msg_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	704 if (ret < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	705 dbg("Packet read error, ignoring. \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	706 return ret; // returns -1
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	707 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	708 if (gstate.rcvd_pkt.cookie != htonl(DHCP_MAGIC)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	709 dbg("Packet with bad magic, ignoring. \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	710 return -2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	711 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	712 if (gstate.rcvd_pkt.op != 1) { //BOOTPREQUEST
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	713 dbg("Not a BOOT REQUEST ignoring. \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	714 return -2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	715 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	716 if (gstate.rcvd_pkt.hlen != 6) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	717 dbg("hlen != 6 ignoring. \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	718 return -2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	719 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	720 dbg("Received a packet. Size : %d \n", ret);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	721 return ret;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	722 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	723
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	724 // Preapres a dhcp packet with defaults and configs
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	725 static uint8_t* prepare_send_pkt(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	726 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	727 memset((void*)&gstate.send_pkt, 0, sizeof(gstate.send_pkt));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	728 gstate.send_pkt.op = 2; //BOOTPREPLY
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	729 gstate.send_pkt.htype = 1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	730 gstate.send_pkt.hlen = 6;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	731 gstate.send_pkt.xid = gstate.rcvd_pkt.xid;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	732 gstate.send_pkt.cookie = htonl(DHCP_MAGIC);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	733 gstate.send_pkt.nsiaddr = gconfig.server_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	734 memcpy(gstate.send_pkt.chaddr, gstate.rcvd_pkt.chaddr, 16);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	735 gstate.send_pkt.options[0] = DHCP_OPT_END;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	736 return gstate.send_pkt.options;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	737 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	738
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	739 // Sets a option value in dhcp packet's option field
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	740 static uint8_t* set_optval(uint8_t optptr, uint16_t opt, void var, size_t len)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	741 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	742 while (*optptr != DHCP_OPT_END) optptr++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	743 *optptr++ = (uint8_t)(opt & 0x00FF);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	744 *optptr++ = (uint8_t) len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	745 memcpy(optptr, var, len);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	746 optptr += len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	747 *optptr = DHCP_OPT_END;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	748 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	749 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	750
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	751 // Gets a option value from dhcp packet's option field
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	752 static uint8_t* get_optval(uint8_t optptr, uint16_t opt, void var)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	753 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	754 size_t len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	755 uint8_t overloaded = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	756
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	757 while (1) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	758 while (*optptr == DHCP_OPT_PADDING) optptr++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	759 if ((*optptr & 0x00FF) == DHCP_OPT_END) break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	760 if ((*optptr & 0x00FF) == DHCP_OPT_OPTION_OVERLOAD) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	761 overloaded = optptr[2];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	762 optptr += optptr[1] + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	763 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	764 len = optptr[1];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	765 if (*optptr == (opt & 0x00FF))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	766 switch (opt & 0xFF00) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	767 case DHCP_NUM32: // FALLTHROUGH
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	768 case DHCP_IP:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	769 memcpy(var, optptr+2, sizeof(uint32_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	770 optptr += len + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	771 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	772 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	773 case DHCP_NUM16:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	774 memcpy(var, optptr+2, sizeof(uint16_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	775 optptr += len + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	776 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	777 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	778 case DHCP_NUM8:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	779 memcpy(var, optptr+2, sizeof(uint8_t));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	780 optptr += len + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	781 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	782 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	783 case DHCP_STRING:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	784 var = xstrndup((char*) optptr, len);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	785 optptr += len + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	786 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	787 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	788 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	789 optptr += len + 2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	790 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	791 if ((overloaded == 1) \| (overloaded == 3)) get_optval((uint8_t*)&gstate.rcvd_pkt.file, opt, var);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	792 if ((overloaded == 2) \| (overloaded == 3)) get_optval((uint8_t*)&gstate.rcvd_pkt.sname, opt, var);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	793 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	794 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	795
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	796 // Retrives Requested Parameter list from dhcp req packet.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	797 static uint8_t get_reqparam(uint8_t **list)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	798 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	799 uint8_t len, *optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	800 if(list) free(list);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	801 for (optptr = gstate.rcvd_pkt.options;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	802 optptr && optptr!=((DHCP_OPT_PARAM_REQ) & 0x00FF); optptr+=optptr[1]+2);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	803 len = *++optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	804 *list = xzalloc(len+1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	805 memcpy(*list, ++optptr, len);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	806 return len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	807 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	808
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	809 // Sets values of req param in dhcp offer packet.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	810 static uint8_t* set_reqparam(uint8_t optptr, uint8_t list)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	811 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	812 uint8_t reqcode;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	813 int count, size = ARRAY_LEN(options_list);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	814
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	815 while (*list) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	816 reqcode = *list++;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	817 for (count = 0; count < size; count++) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	818 if ((options_list[count].code & 0X00FF)==reqcode) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	819 if (!(options_list[count].len) \|\| !(options_list[count].val)) break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	820 for (; optptr && optptr!=DHCP_OPT_END; optptr+=optptr[1]+2);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	821 *optptr++ = (uint8_t) (options_list[count].code & 0x00FF);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	822 *optptr++ = (uint8_t) options_list[count].len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	823 memcpy(optptr, options_list[count].val, options_list[count].len);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	824 optptr += options_list[count].len;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	825 *optptr = DHCP_OPT_END;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	826 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	827 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	828 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	829 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	830 return optptr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	831 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	832
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	833 static void run_notify(char **argv)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	834 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	835 struct stat sts;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	836 volatile int error = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	837 pid_t pid;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	838
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	839 if (stat(argv[0], &sts) == -1 && errno == ENOENT) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	840 infomsg(infomode, "notify file: %s : not exist.", argv[0]);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	841 return;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	842 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	843 fflush(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	844
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	845 pid = vfork();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	846 if (pid < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	847 dbg("Fork failed.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	848 return;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	849 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	850 if (!pid) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	851 execvp(argv[0], argv);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	852 error = errno;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	853 _exit(111);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	854 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	855 if (error) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	856 waitpid(pid, NULL, 0);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	857 errno = error;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	858 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	859 dbg("script complete.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	860 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	861
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	862 static int write_leasefile(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	863 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	864 int fd;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	865 uint32_t curr, tmp_time;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	866 int64_t timestamp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	867 struct arg_list *listdls = gstate.dleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	868 dyn_lease *dls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	869
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	870 if ((fd = open(gconfig.lease_file, O_WRONLY \| O_CREAT \| O_TRUNC)) < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	871 perror_msg("can't open %s ", gconfig.lease_file);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	872 return fd;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	873 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	874
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	875 curr = timestamp = time(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	876 timestamp = SWAP_BE64(timestamp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	877 writeall(fd, &timestamp, sizeof(timestamp));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	878
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	879 while (listdls) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	880 dls = (dyn_lease*)listdls->arg;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	881 tmp_time = dls->expires;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	882 dls->expires -= curr;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	883 if ((int32_t) dls->expires < 0) goto skip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	884 dls->expires = htonl(dls->expires);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	885 writeall(fd, dls, sizeof(dyn_lease));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	886 skip:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	887 dls->expires = tmp_time;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	888 listdls = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	889 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	890 close(fd);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	891 if (gconfig.notify_file) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	892 char *argv[3];
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	893 argv[0] = gconfig.notify_file;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	894 argv[1] = gconfig.lease_file;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	895 argv[2] = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	896 run_notify(argv);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	897 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	898 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	899 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	900
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	901 // Update max lease time from options.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	902 static void set_maxlease(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	903 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	904 int count, size = ARRAY_LEN(options_list);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	905 for (count = 0; count < size; count++)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	906 if (options_list[count].val && options_list[count].code == (DHCP_OPT_LEASE_TIME)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	907 gconfig.max_lease_sec = ((uint32_t)options_list[count].val);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	908 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	909 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	910 if (!gconfig.max_lease_sec) gconfig.max_lease_sec = (606024*10);// DEFAULT_LEASE_TIME;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	911 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	912
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	913 // Returns lease time for client.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	914 static uint32_t get_lease(uint32_t req_exp)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	915 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	916 uint32_t now = time(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	917 req_exp = req_exp - now;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	918 if ((req_exp <= 0) \|\| (req_exp > gconfig.max_lease_sec))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	919 return gconfig.max_lease_sec;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	920
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	921 if (req_exp < gconfig.min_lease_sec)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	922 return gconfig.min_lease_sec;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	923
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	924 return req_exp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	925 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	926
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	927 // Verify ip NIP in current leases ( assigned or not)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	928 static int verifyip_in_lease(uint32_t nip, uint8_t mac[6])
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	929 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	930 static_lease *sls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	931 struct arg_list *listdls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	932
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	933 for (listdls = gstate.dleases; listdls; listdls = listdls->next) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	934 if (((dyn_lease*) listdls->arg)->lease_nip == nip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	935 if (((int32_t)(((dyn_lease*) listdls->arg)->expires) - time(NULL)) < 0)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	936 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	937 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	938 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	939 if (!memcmp(((dyn_lease*) listdls->arg)->lease_mac, mac, 6)) return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	940 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	941 for (sls = gstate.sleases; sls; sls = sls->next)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	942 if (sls->nip == nip) return -2;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	943
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	944 if ((ntohl(nip) < gconfig.start_ip) \|\| (ntohl(nip) > gconfig.end_ip))
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	945 return -3;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	946
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	947 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	948 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	949
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	950 // add ip assigned_nip to dynamic lease.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	951 static int addip_to_lease(uint32_t assigned_nip, uint8_t mac[6], uint32_t req_exp, char hostname, uint8_t update)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	952 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	953 dyn_lease *dls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	954 struct arg_list *listdls = gstate.dleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	955 uint32_t now = time(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	956
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	957 while (listdls) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	958 if (!memcmp(((dyn_lease*) listdls->arg)->lease_mac, mac, 6)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	959 if (update) req_exp = get_lease(req_exp + ((dyn_lease*) listdls->arg)->expires);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	960 ((dyn_lease) listdls->arg)->expires = req_exp + now;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	961 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	962 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	963 listdls = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	964 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	965
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	966 dls = xzalloc(sizeof(dyn_lease));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	967 memcpy(dls->lease_mac, mac, 6);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	968 dls->lease_nip = assigned_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	969 if (hostname) memcpy(dls->hostname, hostname, 20);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	970
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	971 if (update) req_exp = get_lease(req_exp + now);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	972 dls->expires = *req_exp + now;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	973
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	974 listdls = xzalloc(sizeof(struct arg_list));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	975 listdls->next = gstate.dleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	976 listdls->arg = (char*)dls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	977 gstate.dleases = listdls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	978
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	979 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	980 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	981
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	982 // delete ip assigned_nip from dynamic lease.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	983 static int delip_from_lease(uint32_t assigned_nip, uint8_t mac[6], uint32_t del_time)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	984 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	985 struct arg_list *listdls = gstate.dleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	986
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	987 while (listdls) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	988 if (!memcmp(((dyn_lease*) listdls->arg)->lease_mac, mac, 6)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	989 ((dyn_lease*) listdls->arg)->expires = del_time + time(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	990 return 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	991 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	992 listdls = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	993 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	994 return -1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	995 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	996
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	997 // returns a IP from static, dynamic leases or free ip pool, 0 otherwise.
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	998 static uint32_t getip_from_pool(uint32_t req_nip, uint8_t mac[6], uint32_t req_exp, char hostname)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	999 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1000 uint32_t nip = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1001 static_lease *sls = gstate.sleases;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1002 struct arg_list listdls = gstate.dleases, tmp = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1003
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1004 if (req_nip && (!verifyip_in_lease(req_nip, mac))) nip = req_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1005
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1006 if (!nip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1007 while (listdls) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1008 if (!memcmp(((dyn_lease*)listdls->arg)->lease_mac, mac, 6)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1009 nip = ((dyn_lease*)listdls->arg)->lease_nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1010 if (tmp) tmp->next = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1011 else gstate.dleases = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1012 free(listdls->arg);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1013 free(listdls);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1014 if (verifyip_in_lease(nip, mac) < 0) nip = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1015 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1016 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1017 tmp = listdls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1018 listdls = listdls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1019 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1020 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1021 if (!nip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1022 while (sls) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1023 if (memcmp(sls->mac, mac, 6) == 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1024 nip = sls->nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1025 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1026 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1027 sls = sls->next;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1028 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1029 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1030 if (!nip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1031 for (nip = htonl(gconfig.start_ip); ntohl(nip) <= gconfig.end_ip; ) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1032 if (!verifyip_in_lease(nip, mac)) break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1033 nip = ntohl(nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1034 nip = htonl(++nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1035 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1036 if (ntohl(nip) > gconfig.end_ip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1037 nip = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1038 infomsg(infomode, "can't find free IP in IP Pool.");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1039 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1040 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1041 if (nip) addip_to_lease(nip, mac, req_exp, hostname, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1042 return nip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1043 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1044
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1045 static int read_leasefile(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1046 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1047 uint32_t passed, ip;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1048 int32_t tmp_time;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1049 int64_t timestamp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1050 dyn_lease *dls;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1051 int ret = -1, fd = open(gconfig.lease_file, O_RDONLY);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1052
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1053 if (fd < 0) return fd;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1054 dls = xzalloc(sizeof(dyn_lease));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1055
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1056 if (read(fd, &timestamp, sizeof(timestamp)) != sizeof(timestamp)) goto error_exit;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1057
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1058 timestamp = SWAP_BE64(timestamp);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1059 passed = time(NULL) - timestamp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1060 if ((uint64_t)passed > 12 * 60 * 60) goto error_exit;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1061
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1062 while (read(fd, dls, sizeof(dyn_lease)) == sizeof(dyn_lease)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1063 ip = ntohl(dls->lease_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1064 if (ip >= gconfig.start_ip && ip <= gconfig.end_ip) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1065 tmp_time = ntohl(dls->expires) - passed;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1066 if (tmp_time < 0) continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1067 addip_to_lease(dls->lease_nip, dls->lease_mac, (uint32_t*)&tmp_time, dls->hostname, 0);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1068 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1069 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1070 ret = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1071 error_exit:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1072 free(dls);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1073 close(fd);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1074 return ret;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1075 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1076
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1077 void dhcpd_main(void)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1078 {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1079 struct timeval tv;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1080 int retval;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1081 uint8_t *optptr, msgtype = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1082 uint32_t waited = 0, serverid = 0, requested_nip = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1083 uint32_t reqested_lease = 0, ip_pool_size = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1084 char *hstname = NULL;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1085 fd_set rfds;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1086
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1087 infomode = LOG_CONSOLE;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1088 if (!(flag_chk(FLAG_f))) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1089 daemonize();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1090 infomode = LOG_SILENT;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1091 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1092 if (flag_chk(FLAG_S)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1093 openlog("UDHCPD :", LOG_PID, LOG_DAEMON);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1094 infomode \|= LOG_SYSTEM;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1095 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1096 setlinebuf(stdout);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1097 parse_server_config((toys.optc==1)?toys.optargs[0]:"/etc/dhcpd.conf", keywords); //DHCPD_CONF_FILE
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1098 infomsg(infomode, "toybox dhcpd started");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1099 gconfig.start_ip = ntohl(gconfig.start_ip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1100 gconfig.end_ip = ntohl(gconfig.end_ip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1101 ip_pool_size = gconfig.end_ip - gconfig.start_ip + 1;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1102 if (gconfig.max_leases > ip_pool_size) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1103 error_msg("max_leases=%u is too big, setting to %u", (unsigned) gconfig.max_leases, ip_pool_size);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1104 gconfig.max_leases = ip_pool_size;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1105 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1106 write_pid(gconfig.pidfile);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1107 set_maxlease();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1108 read_leasefile();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1109
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1110 if (get_interface(gconfig.interface, &gconfig.ifindex, &gconfig.server_nip,
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1111 gconfig.server_mac)<0)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1112 perror_exit("Failed to get interface %s", gconfig.interface);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1113 gconfig.server_nip = htonl(gconfig.server_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1114
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1115 setup_signal();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1116 open_listensock();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1117 fcntl(gstate.listensock, F_SETFD, FD_CLOEXEC);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1118
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1119 for (;;) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1120 uint32_t timestmp = time(NULL);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1121 FD_ZERO(&rfds);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1122 FD_SET(gstate.listensock, &rfds);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1123 FD_SET(sigfd.rd, &rfds);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1124 tv.tv_sec = gconfig.auto_time - waited;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1125 tv.tv_usec = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1126 retval = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1127 serverid = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1128 msgtype = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1129
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1130 int maxfd = (sigfd.rd > gstate.listensock)? sigfd.rd : gstate.listensock;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1131 dbg("select waiting ....\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1132 retval = select(maxfd + 1, &rfds, NULL, NULL, (gconfig.auto_time?&tv:NULL));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1133 if (retval < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1134 if (errno == EINTR) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1135 waited += (unsigned) time(NULL) - timestmp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1136 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1137 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1138 dbg("Error in select wait again...\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1139 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1140 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1141 if (!retval) { // Timed out
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1142 dbg("select wait Timed Out...\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1143 waited = 0;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1144 write_leasefile();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1145 if (get_interface(gconfig.interface, &gconfig.ifindex, &gconfig.server_nip, gconfig.server_mac)<0)
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1146 perror_exit("Interface lost %s\n", gconfig.interface);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1147 gconfig.server_nip = htonl(gconfig.server_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1148 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1149 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1150 if (FD_ISSET(sigfd.rd, &rfds)) { // Some Activity on RDFDs : is signal
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1151 unsigned char sig;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1152 if (read(sigfd.rd, &sig, 1) != 1) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1153 dbg("signal read failed.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1154 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1155 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1156 switch (sig) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1157 case SIGUSR1:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1158 infomsg(infomode, "Received SIGUSR1");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1159 write_leasefile();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1160 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1161 case SIGTERM:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1162 infomsg(infomode, "Received SIGTERM");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1163 write_leasefile();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1164 unlink(gconfig.pidfile);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1165 exit(0);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1166 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1167 default: break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1168 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1169 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1170 if (FD_ISSET(gstate.listensock, &rfds)) { // Some Activity on RDFDs : is socket
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1171 dbg("select listen sock read\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1172 if (read_packet() < 0) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1173 open_listensock();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1174 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1175 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1176 waited += time(NULL) - timestmp;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1177 get_optval((uint8_t*)&gstate.rcvd_pkt.options, DHCP_OPT_MESSAGE_TYPE, &gstate.rqcode);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1178 if (gstate.rqcode == 0 \|\| gstate.rqcode < DHCPDISCOVER
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1179 \|\| gstate.rqcode > DHCPINFORM) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1180 dbg("no or bad message type option, ignoring packet.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1181 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1182 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1183 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_SERVER_ID, &serverid);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1184 if (serverid && (serverid != gconfig.server_nip)) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1185 dbg("server ID doesn't match, ignoring packet.\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1186 continue;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1187 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1188 switch (gstate.rqcode) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1189 case DHCPDISCOVER:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1190 msgtype = DHCPOFFER;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1191 dbg("Message Type : DHCPDISCOVER\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1192 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_REQUESTED_IP, &requested_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1193 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_HOST_NAME, &hstname);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1194 reqested_lease = gconfig.offer_time;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1195 get_reqparam(&gstate.rqopt);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1196 optptr = prepare_send_pkt();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1197 gstate.send_pkt.yiaddr = getip_from_pool(requested_nip, gstate.rcvd_pkt.chaddr, &reqested_lease, hstname);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1198 if(!gstate.send_pkt.yiaddr){
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1199 msgtype = DHCPNAK;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1200 optptr = set_optval(optptr, DHCP_OPT_MESSAGE_TYPE, &msgtype, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1201 send_packet(1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1202 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1203 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1204 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_LEASE_TIME, &reqested_lease);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1205 reqested_lease = htonl(get_lease(reqested_lease + time(NULL)));
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1206 optptr = set_optval(optptr, DHCP_OPT_MESSAGE_TYPE, &msgtype, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1207 optptr = set_optval(optptr, DHCP_OPT_SERVER_ID, &gconfig.server_nip, 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1208 optptr = set_optval(optptr, DHCP_OPT_LEASE_TIME, &reqested_lease, 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1209 optptr = set_reqparam(optptr, gstate.rqopt);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1210 send_packet(1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1211 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1212 case DHCPREQUEST:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1213 msgtype = DHCPACK;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1214 dbg("Message Type : DHCPREQUEST\n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1215 optptr = prepare_send_pkt();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1216 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_REQUESTED_IP, &requested_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1217 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_LEASE_TIME, &reqested_lease);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1218 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_HOST_NAME, &hstname);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1219 gstate.send_pkt.yiaddr = getip_from_pool(requested_nip, gstate.rcvd_pkt.chaddr, &reqested_lease, hstname);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1220 if (!serverid) reqested_lease = gconfig.max_lease_sec;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1221 if (!gstate.send_pkt.yiaddr) {
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1222 msgtype = DHCPNAK;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1223 optptr = set_optval(optptr, DHCP_OPT_MESSAGE_TYPE, &msgtype, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1224 send_packet(1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1225 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1226 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1227 optptr = set_optval(optptr, DHCP_OPT_MESSAGE_TYPE, &msgtype, 1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1228 optptr = set_optval(optptr, DHCP_OPT_SERVER_ID, &gconfig.server_nip, 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1229 reqested_lease = htonl(reqested_lease);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1230 optptr = set_optval(optptr, DHCP_OPT_LEASE_TIME, &reqested_lease, 4);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1231 send_packet(1);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1232 write_leasefile();
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1233 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1234 case DHCPDECLINE:// FALL THROUGH
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1235 case DHCPRELEASE:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1236 dbg("Message Type : DHCPDECLINE or DHCPRELEASE \n");
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1237 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_SERVER_ID, &serverid);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1238 if (serverid != gconfig.server_nip) break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1239 get_optval((uint8_t*) &gstate.rcvd_pkt.options, DHCP_OPT_REQUESTED_IP, &requested_nip);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1240 delip_from_lease(requested_nip, gstate.rcvd_pkt.chaddr, (gstate.rqcode==DHCPRELEASE)?0:gconfig.decline_time);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1241 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1242 default:
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1243 dbg("Message Type : %u\n", gstate.rqcode);
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1244 break;
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1245 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1246 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1247 }
03f72b57a092 DHCP client and server, from Ashwini Sharma. Rob Landley <rob@landley.net> parents: diff changeset	1248 }

Mercurial > hg > toybox

annotate toys/pending/dhcpd.c @ 1265:0ecfaa7022e8 draft