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
27 uint8_t op
; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
28 uint8_t htype
; /* hardware address type. 1 = 10mb ethernet */
29 uint8_t hlen
; /* hardware address length */
30 uint8_t hops
; /* used by relay agents only */
31 uint32_t xid
; /* unique id */
32 uint16_t secs
; /* elapsed since client began acquisition/renewal */
33 uint16_t flags
; /* only one flag so far: */
34 #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
35 uint32_t ciaddr
; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
36 uint32_t yiaddr
; /* 'your' (client) IP address */
37 uint32_t siaddr
; /* IP address of next server to use in bootstrap,
38 * returned in DHCPOFFER, DHCPACK by server */
39 uint32_t giaddr
; /* relay agent IP address */
40 uint8_t chaddr
[16];/* link-layer client hardware address (MAC) */
41 uint8_t sname
[64]; /* server host name (ASCIZ) */
42 uint8_t file
[128]; /* boot file name (ASCIZ) */
43 uint32_t cookie
; /* fixed first four option bytes (99,130,83,99 dec) */
44 uint8_t options
[DHCP_OPTIONS_BUFSIZE
+ CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS
];
47 struct udp_dhcp_packet
{
50 struct dhcpMessage data
;
53 /* Let's see whether compiler understood us right */
54 struct BUG_bad_sizeof_struct_udp_dhcp_packet
{
55 char BUG_bad_sizeof_struct_udp_dhcp_packet
56 [(sizeof(struct udp_dhcp_packet
) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS
) ? -1 : 1];
59 uint16_t udhcp_checksum(void *addr
, int count
) FAST_FUNC
;
61 void udhcp_init_header(struct dhcpMessage
*packet
, char type
) FAST_FUNC
;
63 /*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
64 int udhcp_recv_kernel_packet(struct dhcpMessage
*packet
, int fd
) FAST_FUNC
;
66 int udhcp_send_raw_packet(struct dhcpMessage
*payload
,
67 uint32_t source_ip
, int source_port
,
68 uint32_t dest_ip
, int dest_port
, const uint8_t *dest_arp
,
69 int ifindex
) FAST_FUNC
;
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
) FAST_FUNC
;
75 extern int minpkt
; // zzz
79 void udhcp_run_script(struct dhcpMessage
*packet
, const char *name
) FAST_FUNC
;
81 // Still need to clean these up...
84 #define get_option udhcp_get_option
85 #define end_option udhcp_end_option
86 #define add_option_string udhcp_add_option_string
87 #define add_simple_option udhcp_add_simple_option
89 void udhcp_sp_setup(void) FAST_FUNC
;
90 int udhcp_sp_fd_set(fd_set
*rfds
, int extra_fd
) FAST_FUNC
;
91 int udhcp_sp_read(const fd_set
*rfds
) FAST_FUNC
;
92 int udhcp_read_interface(const char *interface
, int *ifindex
, uint32_t *addr
, uint8_t *arp
) FAST_FUNC
;
93 int udhcp_raw_socket(int ifindex
) FAST_FUNC
;
94 int udhcp_listen_socket(/*uint32_t ip,*/ int port
, const char *inf
) FAST_FUNC
;
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
) FAST_FUNC
;
98 #if ENABLE_UDHCP_DEBUG
99 # define DEBUG(str, args...) bb_info_msg("### " str, ## args)
101 # define DEBUG(str, args...) do {;} while (0)
104 POP_SAVED_FUNCTION_VISIBILITY