blob: 4f2d31c980de0f5fc342e7d7472b6dd6e9118895 [file] [log] [blame]
"Robert P. J. Day"63fc1a92006-07-02 19:47:05 +00001/* vi: set sw=4 ts=4: */
Mike Frysinger7031f622006-05-08 03:20:50 +00002/* common.h
3 *
4 * Russ Dill <Russ.Dill@asu.edu> September 2001
5 * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
6 *
Rob Landley3f785612006-05-28 01:06:36 +00007 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Mike Frysinger7031f622006-05-08 03:20:50 +00008 */
9
10#ifndef _COMMON_H
11#define _COMMON_H
12
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000013#include "libbb.h"
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000014
Denis Vlasenko1d14e6f2006-12-22 11:47:19 +000015#define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000016
Denis Vlasenkofbd29182007-04-07 01:05:47 +000017extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000018
19/*** packet.h ***/
20
21#include <netinet/udp.h>
22#include <netinet/ip.h>
23
24struct dhcpMessage {
25 uint8_t op;
26 uint8_t htype;
27 uint8_t hlen;
28 uint8_t hops;
29 uint32_t xid;
30 uint16_t secs;
31 uint16_t flags;
32 uint32_t ciaddr;
33 uint32_t yiaddr;
34 uint32_t siaddr;
35 uint32_t giaddr;
36 uint8_t chaddr[16];
37 uint8_t sname[64];
38 uint8_t file[128];
39 uint32_t cookie;
40 uint8_t options[308]; /* 312 - cookie */
Denis Vlasenko6884f662007-11-23 00:08:54 +000041} ATTRIBUTE_PACKED;
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000042
43struct udp_dhcp_packet {
44 struct iphdr ip;
45 struct udphdr udp;
46 struct dhcpMessage data;
Denis Vlasenko6884f662007-11-23 00:08:54 +000047} ATTRIBUTE_PACKED;
48
49/* Let's see whether compiler understood us right */
50struct BUG_bad_sizeof_struct_udp_dhcp_packet {
51 char BUG_bad_sizeof_struct_udp_dhcp_packet
52 [sizeof(struct udp_dhcp_packet) != 576 ? -1 : 1];
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000053};
54
55void udhcp_init_header(struct dhcpMessage *packet, char type);
56int udhcp_get_packet(struct dhcpMessage *packet, int fd);
57uint16_t udhcp_checksum(void *addr, int count);
58int udhcp_raw_packet(struct dhcpMessage *payload,
59 uint32_t source_ip, int source_port,
Denis Vlasenkofbd29182007-04-07 01:05:47 +000060 uint32_t dest_ip, int dest_port,
61 const uint8_t *dest_arp, int ifindex);
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000062int udhcp_kernel_packet(struct dhcpMessage *payload,
63 uint32_t source_ip, int source_port,
64 uint32_t dest_ip, int dest_port);
65
66
67/**/
68
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000069void udhcp_run_script(struct dhcpMessage *packet, const char *name);
70
71// Still need to clean these up...
72
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000073/* from options.h */
74#define get_option udhcp_get_option
75#define end_option udhcp_end_option
76#define add_option_string udhcp_add_option_string
77#define add_simple_option udhcp_add_simple_option
78#define option_lengths udhcp_option_lengths
79/* from socket.h */
80#define listen_socket udhcp_listen_socket
81#define read_interface udhcp_read_interface
Mike Frysinger7031f622006-05-08 03:20:50 +000082
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000083void udhcp_sp_setup(void);
84int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
Denis Vlasenko223bc972007-11-22 00:58:49 +000085int udhcp_sp_read(const fd_set *rfds);
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000086int raw_socket(int ifindex);
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +000087int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
Denis Vlasenkoa27a11b2007-08-18 14:16:39 +000088int listen_socket(/*uint32_t ip,*/ int port, const char *inf);
Denis Vlasenko42b3dea2007-07-03 15:47:50 +000089/* Returns 1 if no reply received */
90int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface);
Mike Frysinger7031f622006-05-08 03:20:50 +000091
Rob Landley3f785612006-05-28 01:06:36 +000092#if ENABLE_FEATURE_UDHCP_DEBUG
Denis Vlasenko3538b9a2006-09-06 18:36:50 +000093# define DEBUG(str, args...) bb_info_msg(str, ## args)
Mike Frysinger7031f622006-05-08 03:20:50 +000094#else
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000095# define DEBUG(str, args...) do {;} while (0)
Mike Frysinger7031f622006-05-08 03:20:50 +000096#endif
97
98#endif