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.
14 #include <netinet/udp.h>
15 #include <netinet/ip.h>
17 #if __GNUC_PREREQ(4,1)
18 # pragma GCC visibility push(hidden)
21 #define DEFAULT_SCRIPT CONFIG_UDHCPC_DEFAULT_SCRIPT
23 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
27 #define DHCP_OPTIONS_BUFSIZE 308
30 uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
31 uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
32 uint8_t hlen; /* hardware address length */
33 uint8_t hops; /* used by relay agents only */
34 uint32_t xid; /* unique id */
35 uint16_t secs; /* elapsed since client began acquisition/renewal */
36 uint16_t flags; /* only one flag so far: */
37 #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
38 uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
39 uint32_t yiaddr; /* 'your' (client) IP address */
40 uint32_t siaddr; /* IP address of next server to use in bootstrap,
41 * returned in DHCPOFFER, DHCPACK by server */
42 uint32_t giaddr; /* relay agent IP address */
43 uint8_t chaddr[16];/* link-layer client hardware address (MAC) */
44 uint8_t sname[64]; /* server host name (ASCIZ) */
45 uint8_t file[128]; /* boot file name (ASCIZ) */
46 uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
47 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
50 struct udp_dhcp_packet {
53 struct dhcpMessage data;
56 /* Let's see whether compiler understood us right */
57 struct BUG_bad_sizeof_struct_udp_dhcp_packet {
58 char BUG_bad_sizeof_struct_udp_dhcp_packet
59 [(sizeof(struct udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
62 uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
64 void udhcp_init_header(struct dhcpMessage *packet, char type) FAST_FUNC;
66 /*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
67 int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd) FAST_FUNC;
69 int udhcp_send_raw_packet(struct dhcpMessage *payload,
70 uint32_t source_ip, int source_port,
71 uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
72 int ifindex) FAST_FUNC;
74 int udhcp_send_kernel_packet(struct dhcpMessage *payload,
75 uint32_t source_ip, int source_port,
76 uint32_t dest_ip, int dest_port) FAST_FUNC;
81 void udhcp_run_script(struct dhcpMessage *packet, const char *name) FAST_FUNC;
83 // Still need to clean these up...
86 #define get_option udhcp_get_option
87 #define end_option udhcp_end_option
88 #define add_option_string udhcp_add_option_string
89 #define add_simple_option udhcp_add_simple_option
91 void udhcp_sp_setup(void) FAST_FUNC;
92 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
93 int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
94 int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp) FAST_FUNC;
95 int udhcp_raw_socket(int ifindex) FAST_FUNC;
96 int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
97 /* Returns 1 if no reply received */
98 int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface) FAST_FUNC;
100 #if ENABLE_UDHCP_DEBUG
101 # define DEBUG(str, args...) bb_info_msg("### " str, ## args)
103 # define DEBUG(str, args...) do {;} while (0)
106 #if __GNUC_PREREQ(4,1)
107 # pragma GCC visibility pop