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-rw-r--r--networking/udhcp/common.h58
1 files changed, 25 insertions, 33 deletions
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index 9d1f71aae..bba3d6037 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -40,7 +40,7 @@ struct dhcp_packet {
40 uint32_t yiaddr; /* 'your' (client) IP address */ 40 uint32_t yiaddr; /* 'your' (client) IP address */
41 /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */ 41 /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */
42 uint32_t siaddr_nip; 42 uint32_t siaddr_nip;
43 uint32_t gateway_nip; /* relay agent IP address */ 43 uint32_t gateway_nip; /* aka 'giaddr': relay agent IP address */
44 uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */ 44 uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */
45 uint8_t sname[64]; /* server host name (ASCIZ) */ 45 uint8_t sname[64]; /* server host name (ASCIZ) */
46 uint8_t file[128]; /* boot file name (ASCIZ) */ 46 uint8_t file[128]; /* boot file name (ASCIZ) */
@@ -222,10 +222,9 @@ uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen)
222#endif 222#endif
223struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC; 223struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
224 224
225
226// RFC 2131 Table 5: Fields and options used by DHCP clients 225// RFC 2131 Table 5: Fields and options used by DHCP clients
227// 226//
228// Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero 227// Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero, 'chaddr' is always client's MAC
229// 228//
230// Field DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE 229// Field DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE
231// ----- ------------ ------------ ----------- ----------- ----------- 230// ----- ------------ ------------ ----------- ----------- -----------
@@ -234,56 +233,49 @@ struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code)
234// 'secs' 0 or seconds since 0 or seconds since 0 or seconds since 0 0 233// 'secs' 0 or seconds since 0 or seconds since 0 or seconds since 0 0
235// DHCP process started DHCP process started DHCP process started 234// DHCP process started DHCP process started DHCP process started
236// 'flags' Set 'BROADCAST' Set 'BROADCAST' Set 'BROADCAST' 0 0 235// 'flags' Set 'BROADCAST' Set 'BROADCAST' Set 'BROADCAST' 0 0
237// flag if client flag if client flag if client 236// flag if client needs flag if client needs flag if client needs
238// requires broadcast requires broadcast requires broadcast 237// broadcast reply broadcast reply broadcast reply
239// reply reply reply
240// 'ciaddr' 0 client's IP 0 or client's IP 0 client's IP 238// 'ciaddr' 0 client's IP 0 or client's IP 0 client's IP
241// (BOUND/RENEW/REBIND) 239// (BOUND/RENEW/REBIND)
242// 'chaddr' client's MAC client's MAC client's MAC client's MAC client's MAC
243// 'sname' options or sname options or sname options or sname (unused) (unused) 240// 'sname' options or sname options or sname options or sname (unused) (unused)
244// 'file' options or file options or file options or file (unused) (unused) 241// 'file' options or file options or file options or file (unused) (unused)
245// 'options' options options options message type opt message type opt 242// 'options' options options options message type opt message type opt
246// 243//
247// Option DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE 244// Option DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE
248// ------ ------------ ---------- ----------- ----------- ----------- 245// ------ ------------ ---------- ----------- ----------- -----------
249// Requested IP address MAY MUST NOT MUST (in MUST MUST NOT 246// Requested IP address MAY MUST NOT MUST (in SELECTING MUST MUST NOT
250// SELECTING or 247// or INIT-REBOOT)
251// INIT-REBOOT) 248// MUST NOT (in BOUND
252// MUST NOT (in 249// or RENEWING)
253// BOUND or 250// IP address lease time MAY MUST NOT MAY MUST NOT MUST NOT
254// RENEWING) 251// Use 'file'/'sname' fields MAY MAY MAY MAY MAY
255// IP address lease time MAY MUST NOT MAY MUST NOT MUST NOT 252// Client identifier MAY MAY MAY MAY MAY
256// Use 'file'/'sname' fields MAY MAY MAY MAY MAY 253// Vendor class identifier MAY MAY MAY MUST NOT MUST NOT
257// Client identifier MAY MAY MAY MAY MAY 254// Server identifier MUST NOT MUST NOT MUST (after SELECTING) MUST MUST
258// Vendor class identifier MAY MAY MAY MUST NOT MUST NOT
259// Server identifier MUST NOT MUST NOT MUST (after MUST MUST
260// SELECTING)
261// MUST NOT (after 255// MUST NOT (after
262// INIT-REBOOT, 256// INIT-REBOOT, BOUND,
263// BOUND, RENEWING 257// RENEWING or REBINDING)
264// or REBINDING) 258// Parameter request list MAY MAY MAY MUST NOT MUST NOT
265// Parameter request list MAY MAY MAY MUST NOT MUST NOT 259// Maximum message size MAY MAY MAY MUST NOT MUST NOT
266// Maximum message size MAY MAY MAY MUST NOT MUST NOT 260// Message SHOULD NOT SHOULD NOT SHOULD NOT SHOULD SHOULD
267// Message SHOULD NOT SHOULD NOT SHOULD NOT SHOULD SHOULD 261// Site-specific MAY MAY MAY MUST NOT MUST NOT
268// Site-specific MAY MAY MAY MUST NOT MUST NOT 262// All others MAY MAY MAY MUST NOT MUST NOT
269// All others MAY MAY MAY MUST NOT MUST NOT
270
271 263
272/*** Logging ***/ 264/*** Logging ***/
273 265
274#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 266#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
275# define IF_UDHCP_VERBOSE(...) __VA_ARGS__ 267# define IF_UDHCP_VERBOSE(...) __VA_ARGS__
276extern unsigned dhcp_verbose; 268extern unsigned dhcp_verbose;
277# define log1(...) do { if (dhcp_verbose >= 1) bb_error_msg(__VA_ARGS__); } while (0) 269# define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0)
278# if CONFIG_UDHCP_DEBUG >= 2 270# if CONFIG_UDHCP_DEBUG >= 2
279void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC; 271void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC;
280# define log2(...) do { if (dhcp_verbose >= 2) bb_error_msg(__VA_ARGS__); } while (0) 272# define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0)
281# else 273# else
282# define udhcp_dump_packet(...) ((void)0) 274# define udhcp_dump_packet(...) ((void)0)
283# define log2(...) ((void)0) 275# define log2(...) ((void)0)
284# endif 276# endif
285# if CONFIG_UDHCP_DEBUG >= 3 277# if CONFIG_UDHCP_DEBUG >= 3
286# define log3(...) do { if (dhcp_verbose >= 3) bb_error_msg(__VA_ARGS__); } while (0) 278# define log3(...) do { if (dhcp_verbose >= 3) bb_info_msg(__VA_ARGS__); } while (0)
287# else 279# else
288# define log3(...) ((void)0) 280# define log3(...) ((void)0)
289# endif 281# endif
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