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.
15 #define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
17 #define SERVER_PORT 67
18 #define CLIENT_PORT 68
20 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
24 #include <netinet/udp.h>
25 #include <netinet/ip.h>
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_packet(struct dhcpMessage *packet, int fd);
65 int udhcp_send_raw_packet(struct dhcpMessage *payload,
66 uint32_t source_ip, int source_port,
67 uint32_t dest_ip, int dest_port,
68 const uint8_t *dest_arp, int ifindex);
69 int udhcp_send_kernel_packet(struct dhcpMessage *payload,
70 uint32_t source_ip, int source_port,
71 uint32_t dest_ip, int dest_port);
76 void udhcp_run_script(struct dhcpMessage *packet, const char *name);
78 // Still need to clean these up...
81 #define get_option udhcp_get_option
82 #define end_option udhcp_end_option
83 #define add_option_string udhcp_add_option_string
84 #define add_simple_option udhcp_add_simple_option
86 #define listen_socket udhcp_listen_socket
87 #define read_interface udhcp_read_interface
89 void udhcp_sp_setup(void);
90 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
91 int udhcp_sp_read(const fd_set *rfds);
92 int raw_socket(int ifindex);
93 int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
94 int listen_socket(/*uint32_t ip,*/ int port, const char *inf);
95 /* Returns 1 if no reply received */
96 int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface);
98 #if ENABLE_FEATURE_UDHCP_DEBUG
99 # define DEBUG(str, args...) bb_info_msg("### " str, ## args)
101 # define DEBUG(str, args...) do {;} while (0)