1 /* vi: set sw=4 ts=4: */
4 * Russ Dill <Russ.Dill@asu.edu> September 2001
5 * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 #define UDHCP_COMMON_H 1
13 #include <netinet/udp.h>
14 #include <netinet/ip.h>
16 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
18 #define DEFAULT_SCRIPT CONFIG_UDHCPC_DEFAULT_SCRIPT
20 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
24 #define DHCP_OPTIONS_BUFSIZE 308
26 //TODO: rename ciaddr/yiaddr/chaddr
28 uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
29 uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
30 uint8_t hlen; /* hardware address length */
31 uint8_t hops; /* used by relay agents only */
32 uint32_t xid; /* unique id */
33 uint16_t secs; /* elapsed since client began acquisition/renewal */
34 uint16_t flags; /* only one flag so far: */
35 #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
36 uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
37 uint32_t yiaddr; /* 'your' (client) IP address */
38 /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */
40 uint32_t gateway_nip; /* relay agent IP address */
41 uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */
42 uint8_t sname[64]; /* server host name (ASCIZ) */
43 uint8_t file[128]; /* boot file name (ASCIZ) */
44 uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
45 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
47 #define DHCP_PKT_SNAME_LEN 64
48 #define DHCP_PKT_FILE_LEN 128
49 #define DHCP_PKT_SNAME_LEN_STR "64"
50 #define DHCP_PKT_FILE_LEN_STR "128"
52 struct ip_udp_dhcp_packet {
55 struct dhcp_packet data;
58 /* Let's see whether compiler understood us right */
59 struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet {
60 char BUG_bad_sizeof_struct_ip_udp_dhcp_packet
61 [(sizeof(struct ip_udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
64 uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
66 void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC;
68 /*int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd); - in dhcpc.h */
69 int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC;
71 int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt,
72 uint32_t source_ip, int source_port,
73 uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
74 int ifindex) FAST_FUNC;
76 int udhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt,
77 uint32_t source_ip, int source_port,
78 uint32_t dest_ip, int dest_port) FAST_FUNC;
83 void udhcp_run_script(struct dhcp_packet *packet, const char *name) FAST_FUNC;
85 // Still need to clean these up...
88 #define get_option udhcp_get_option
89 #define end_option udhcp_end_option
90 #define add_option_string udhcp_add_option_string
91 #define add_simple_option udhcp_add_simple_option
93 void udhcp_sp_setup(void) FAST_FUNC;
94 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
95 int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
96 int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC;
97 int udhcp_raw_socket(int ifindex) FAST_FUNC;
98 int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
99 /* Returns 1 if no reply received */
100 int arpping(uint32_t test_nip,
101 const uint8_t *safe_mac,
104 const char *interface) FAST_FUNC;
106 #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
107 extern unsigned dhcp_verbose;
108 # define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0)
109 # if CONFIG_UDHCP_DEBUG >= 2
110 void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC;
111 # define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0)
113 # define udhcp_dump_packet(...) ((void)0)
114 # define log2(...) ((void)0)
116 # if CONFIG_UDHCP_DEBUG >= 3
117 # define log3(...) do { if (dhcp_verbose >= 3) bb_info_msg(__VA_ARGS__); } while (0)
119 # define log3(...) ((void)0)
122 # define udhcp_dump_packet(...) ((void)0)
123 # define log1(...) ((void)0)
124 # define log2(...) ((void)0)
125 # define log3(...) ((void)0)
128 POP_SAVED_FUNCTION_VISIBILITY