1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* vi: set sw=4 ts=4: */
/* common.h
*
* Russ Dill <Russ.Dill@asu.edu> September 2001
* Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#ifndef _COMMON_H
#define _COMMON_H
#include "libbb.h"
#include <netinet/udp.h>
#include <netinet/ip.h>
#if __GNUC_PREREQ(4,1)
# pragma GCC visibility push(hidden)
#endif
#define DEFAULT_SCRIPT CONFIG_DHCPC_DEFAULT_SCRIPT
extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
/*** packet.h ***/
#define DHCP_OPTIONS_BUFSIZE 308
struct dhcpMessage {
uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
uint8_t hlen; /* hardware address length */
uint8_t hops; /* used by relay agents only */
uint32_t xid; /* unique id */
uint16_t secs; /* elapsed since client began acquisition/renewal */
uint16_t flags; /* only one flag so far: */
#define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
uint32_t yiaddr; /* 'your' (client) IP address */
uint32_t siaddr; /* IP address of next server to use in bootstrap,
* returned in DHCPOFFER, DHCPACK by server */
uint32_t giaddr; /* relay agent IP address */
uint8_t chaddr[16];/* link-layer client hardware address (MAC) */
uint8_t sname[64]; /* server host name (ASCIZ) */
uint8_t file[128]; /* boot file name (ASCIZ) */
uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
} PACKED;
struct udp_dhcp_packet {
struct iphdr ip;
struct udphdr udp;
struct dhcpMessage data;
} PACKED;
/* Let's see whether compiler understood us right */
struct BUG_bad_sizeof_struct_udp_dhcp_packet {
char BUG_bad_sizeof_struct_udp_dhcp_packet
[(sizeof(struct udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
};
uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
void udhcp_init_header(struct dhcpMessage *packet, char type) FAST_FUNC;
/*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd) FAST_FUNC;
int udhcp_send_raw_packet(struct dhcpMessage *payload,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
int ifindex) FAST_FUNC;
int udhcp_send_kernel_packet(struct dhcpMessage *payload,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port) FAST_FUNC;
/**/
void udhcp_run_script(struct dhcpMessage *packet, const char *name) FAST_FUNC;
// Still need to clean these up...
/* from options.h */
#define get_option udhcp_get_option
#define end_option udhcp_end_option
#define add_option_string udhcp_add_option_string
#define add_simple_option udhcp_add_simple_option
void udhcp_sp_setup(void) FAST_FUNC;
int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp) FAST_FUNC;
int udhcp_raw_socket(int ifindex) FAST_FUNC;
int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
/* Returns 1 if no reply received */
int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface) FAST_FUNC;
#if ENABLE_FEATURE_UDHCP_DEBUG
# define DEBUG(str, args...) bb_info_msg("### " str, ## args)
#else
# define DEBUG(str, args...) do {;} while (0)
#endif
#if __GNUC_PREREQ(4,1)
# pragma GCC visibility pop
#endif
#endif
|
