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_DHCPC_DEFAULT_SCRIPT
23 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
27 #define DHCP_OPTIONS_BUFSIZE 308
45 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
48 struct udp_dhcp_packet {
51 struct dhcpMessage data;
54 /* Let's see whether compiler understood us right */
55 struct BUG_bad_sizeof_struct_udp_dhcp_packet {
56 char BUG_bad_sizeof_struct_udp_dhcp_packet
57 [(sizeof(struct udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
60 uint16_t udhcp_checksum(void *addr, int count);
62 void udhcp_init_header(struct dhcpMessage *packet, char type);
64 /*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
65 int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd);
67 int udhcp_send_raw_packet(struct dhcpMessage *payload,
68 uint32_t source_ip, int source_port,
69 uint32_t dest_ip, int dest_port,
70 const uint8_t *dest_arp, int ifindex);
71 int udhcp_send_kernel_packet(struct dhcpMessage *payload,
72 uint32_t source_ip, int source_port,
73 uint32_t dest_ip, int dest_port);
78 void udhcp_run_script(struct dhcpMessage *packet, const char *name);
80 // Still need to clean these up...
83 #define get_option udhcp_get_option
84 #define end_option udhcp_end_option
85 #define add_option_string udhcp_add_option_string
86 #define add_simple_option udhcp_add_simple_option
88 #define listen_socket udhcp_listen_socket
89 #define read_interface udhcp_read_interface
91 void udhcp_sp_setup(void);
92 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
93 int udhcp_sp_read(const fd_set *rfds);
94 int raw_socket(int ifindex);
95 int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
96 int listen_socket(/*uint32_t ip,*/ int port, const char *inf);
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);
100 #if ENABLE_FEATURE_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