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-rw-r--r--networking/udhcp/Kbuild2
-rw-r--r--networking/udhcp/clientpacket.c272
-rw-r--r--networking/udhcp/common.h1
-rw-r--r--networking/udhcp/dhcpc.c245
-rw-r--r--networking/udhcp/dhcpc.h15
5 files changed, 240 insertions, 295 deletions
diff --git a/networking/udhcp/Kbuild b/networking/udhcp/Kbuild
index 473077e44..693f6c873 100644
--- a/networking/udhcp/Kbuild
+++ b/networking/udhcp/Kbuild
@@ -10,7 +10,7 @@ lib-y:=
10lib-$(CONFIG_UDHCPC) += common.o options.o packet.o signalpipe.o socket.o 10lib-$(CONFIG_UDHCPC) += common.o options.o packet.o signalpipe.o socket.o
11lib-$(CONFIG_UDHCPD) += common.o options.o packet.o signalpipe.o socket.o 11lib-$(CONFIG_UDHCPD) += common.o options.o packet.o signalpipe.o socket.o
12 12
13lib-$(CONFIG_UDHCPC) += dhcpc.o clientpacket.o script.o 13lib-$(CONFIG_UDHCPC) += dhcpc.o script.o
14lib-$(CONFIG_UDHCPD) += dhcpd.o arpping.o files.o leases.o static_leases.o 14lib-$(CONFIG_UDHCPD) += dhcpd.o arpping.o files.o leases.o static_leases.o
15lib-$(CONFIG_DUMPLEASES) += dumpleases.o 15lib-$(CONFIG_DUMPLEASES) += dumpleases.o
16lib-$(CONFIG_DHCPRELAY) += dhcprelay.o 16lib-$(CONFIG_DHCPRELAY) += dhcprelay.o
diff --git a/networking/udhcp/clientpacket.c b/networking/udhcp/clientpacket.c
deleted file mode 100644
index b4a75be02..000000000
--- a/networking/udhcp/clientpacket.c
+++ /dev/null
@@ -1,272 +0,0 @@
1/* vi: set sw=4 ts=4: */
2/* clientpacket.c
3 *
4 * Packet generation and dispatching functions for the DHCP client.
5 *
6 * Russ Dill <Russ.Dill@asu.edu> July 2001
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 */
10#include "common.h"
11#include "dhcpd.h"
12#include "dhcpc.h"
13#include "options.h"
14
15//#include <features.h>
16#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined _NEWLIB_VERSION
17#include <netpacket/packet.h>
18#include <net/ethernet.h>
19#else
20#include <asm/types.h>
21#include <linux/if_packet.h>
22#include <linux/if_ether.h>
23#endif
24
25
26/* Create a random xid */
27uint32_t FAST_FUNC random_xid(void)
28{
29 static smallint initialized;
30
31 if (!initialized) {
32 srand(monotonic_us());
33 initialized = 1;
34 }
35 return rand();
36}
37
38
39/* Initialize the packet with the proper defaults */
40static void init_packet(struct dhcp_packet *packet, char type)
41{
42 udhcp_init_header(packet, type);
43 memcpy(packet->chaddr, client_config.client_mac, 6);
44 if (client_config.clientid)
45 add_option_string(packet->options, client_config.clientid);
46 if (client_config.hostname)
47 add_option_string(packet->options, client_config.hostname);
48 if (client_config.fqdn)
49 add_option_string(packet->options, client_config.fqdn);
50 if (type != DHCPDECLINE
51 && type != DHCPRELEASE
52 && client_config.vendorclass
53 ) {
54 add_option_string(packet->options, client_config.vendorclass);
55 }
56}
57
58
59/* Add a parameter request list for stubborn DHCP servers. Pull the data
60 * from the struct in options.c. Don't do bounds checking here because it
61 * goes towards the head of the packet. */
62static void add_param_req_option(struct dhcp_packet *packet)
63{
64 uint8_t c;
65 int end = end_option(packet->options);
66 int i, len = 0;
67
68 for (i = 0; (c = dhcp_options[i].code) != 0; i++) {
69 if (( (dhcp_options[i].flags & OPTION_REQ)
70 && !client_config.no_default_options
71 )
72 || (client_config.opt_mask[c >> 3] & (1 << (c & 7)))
73 ) {
74 packet->options[end + OPT_DATA + len] = c;
75 len++;
76 }
77 }
78 if (len) {
79 packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
80 packet->options[end + OPT_LEN] = len;
81 packet->options[end + OPT_DATA + len] = DHCP_END;
82 }
83}
84
85/* RFC 2131
86 * 4.4.4 Use of broadcast and unicast
87 *
88 * The DHCP client broadcasts DHCPDISCOVER, DHCPREQUEST and DHCPINFORM
89 * messages, unless the client knows the address of a DHCP server.
90 * The client unicasts DHCPRELEASE messages to the server. Because
91 * the client is declining the use of the IP address supplied by the server,
92 * the client broadcasts DHCPDECLINE messages.
93 *
94 * When the DHCP client knows the address of a DHCP server, in either
95 * INIT or REBOOTING state, the client may use that address
96 * in the DHCPDISCOVER or DHCPREQUEST rather than the IP broadcast address.
97 * The client may also use unicast to send DHCPINFORM messages
98 * to a known DHCP server. If the client receives no response to DHCP
99 * messages sent to the IP address of a known DHCP server, the DHCP
100 * client reverts to using the IP broadcast address.
101 */
102
103static int raw_bcast_from_client_config_ifindex(struct dhcp_packet *packet)
104{
105 return udhcp_send_raw_packet(packet,
106 /*src*/ INADDR_ANY, CLIENT_PORT,
107 /*dst*/ INADDR_BROADCAST, SERVER_PORT, MAC_BCAST_ADDR,
108 client_config.ifindex);
109}
110
111
112/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
113int FAST_FUNC send_discover(uint32_t xid, uint32_t requested)
114{
115 struct dhcp_packet packet;
116
117 init_packet(&packet, DHCPDISCOVER);
118 packet.xid = xid;
119 if (requested)
120 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
121 /* Explicitly saying that we want RFC-compliant packets helps
122 * some buggy DHCP servers to NOT send bigger packets */
123 add_simple_option(packet.options, DHCP_MAX_SIZE, htons(576));
124 add_param_req_option(&packet);
125
126 bb_info_msg("Sending discover...");
127 return raw_bcast_from_client_config_ifindex(&packet);
128}
129
130
131/* Broadcast a DHCP request message */
132/* RFC 2131 3.1 paragraph 3:
133 * "The client _broadcasts_ a DHCPREQUEST message..."
134 */
135int FAST_FUNC send_select(uint32_t xid, uint32_t server, uint32_t requested)
136{
137 struct dhcp_packet packet;
138 struct in_addr addr;
139
140 init_packet(&packet, DHCPREQUEST);
141 packet.xid = xid;
142 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
143 add_simple_option(packet.options, DHCP_SERVER_ID, server);
144 add_param_req_option(&packet);
145
146 addr.s_addr = requested;
147 bb_info_msg("Sending select for %s...", inet_ntoa(addr));
148 return raw_bcast_from_client_config_ifindex(&packet);
149}
150
151
152/* Unicast or broadcast a DHCP renew message */
153int FAST_FUNC send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr)
154{
155 struct dhcp_packet packet;
156
157 init_packet(&packet, DHCPREQUEST);
158 packet.xid = xid;
159 packet.ciaddr = ciaddr;
160 add_param_req_option(&packet);
161
162 bb_info_msg("Sending renew...");
163 if (server)
164 return udhcp_send_kernel_packet(&packet,
165 ciaddr, CLIENT_PORT,
166 server, SERVER_PORT);
167 return raw_bcast_from_client_config_ifindex(&packet);
168}
169
170
171#if ENABLE_FEATURE_UDHCPC_ARPING
172/* Broadcast a DHCP decline message */
173int FAST_FUNC send_decline(uint32_t xid, uint32_t server, uint32_t requested)
174{
175 struct dhcp_packet packet;
176
177 init_packet(&packet, DHCPDECLINE);
178 packet.xid = xid;
179 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
180 add_simple_option(packet.options, DHCP_SERVER_ID, server);
181
182 bb_info_msg("Sending decline...");
183 return raw_bcast_from_client_config_ifindex(&packet);
184}
185#endif
186
187
188/* Unicast a DHCP release message */
189int FAST_FUNC send_release(uint32_t server, uint32_t ciaddr)
190{
191 struct dhcp_packet packet;
192
193 init_packet(&packet, DHCPRELEASE);
194 packet.xid = random_xid();
195 packet.ciaddr = ciaddr;
196
197 add_simple_option(packet.options, DHCP_SERVER_ID, server);
198
199 bb_info_msg("Sending release...");
200 return udhcp_send_kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
201}
202
203
204/* Returns -1 on errors that are fatal for the socket, -2 for those that aren't */
205int FAST_FUNC udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd)
206{
207 int bytes;
208 struct ip_udp_dhcp_packet packet;
209 uint16_t check;
210
211 memset(&packet, 0, sizeof(packet));
212 bytes = safe_read(fd, &packet, sizeof(packet));
213 if (bytes < 0) {
214 log1("Packet read error, ignoring");
215 /* NB: possible down interface, etc. Caller should pause. */
216 return bytes; /* returns -1 */
217 }
218
219 if (bytes < (int) (sizeof(packet.ip) + sizeof(packet.udp))) {
220 log1("Packet is too short, ignoring");
221 return -2;
222 }
223
224 if (bytes < ntohs(packet.ip.tot_len)) {
225 /* packet is bigger than sizeof(packet), we did partial read */
226 log1("Oversized packet, ignoring");
227 return -2;
228 }
229
230 /* ignore any extra garbage bytes */
231 bytes = ntohs(packet.ip.tot_len);
232
233 /* make sure its the right packet for us, and that it passes sanity checks */
234 if (packet.ip.protocol != IPPROTO_UDP || packet.ip.version != IPVERSION
235 || packet.ip.ihl != (sizeof(packet.ip) >> 2)
236 || packet.udp.dest != htons(CLIENT_PORT)
237 /* || bytes > (int) sizeof(packet) - can't happen */
238 || ntohs(packet.udp.len) != (uint16_t)(bytes - sizeof(packet.ip))
239 ) {
240 log1("Unrelated/bogus packet, ignoring");
241 return -2;
242 }
243
244 /* verify IP checksum */
245 check = packet.ip.check;
246 packet.ip.check = 0;
247 if (check != udhcp_checksum(&packet.ip, sizeof(packet.ip))) {
248 log1("Bad IP header checksum, ignoring");
249 return -2;
250 }
251
252 /* verify UDP checksum. IP header has to be modified for this */
253 memset(&packet.ip, 0, offsetof(struct iphdr, protocol));
254 /* ip.xx fields which are not memset: protocol, check, saddr, daddr */
255 packet.ip.tot_len = packet.udp.len; /* yes, this is needed */
256 check = packet.udp.check;
257 packet.udp.check = 0;
258 if (check && check != udhcp_checksum(&packet, bytes)) {
259 log1("Packet with bad UDP checksum received, ignoring");
260 return -2;
261 }
262
263 memcpy(dhcp_pkt, &packet.data, bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
264
265 if (dhcp_pkt->cookie != htonl(DHCP_MAGIC)) {
266 bb_info_msg("Packet with bad magic, ignoring");
267 return -2;
268 }
269 log1("Got valid DHCP packet");
270 udhcp_dump_packet(dhcp_pkt);
271 return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
272}
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index 70a2dc7c4..d740ca56c 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -136,7 +136,6 @@ uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
136 136
137void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC; 137void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC;
138 138
139/*int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd); - in dhcpc.h */
140int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC; 139int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC;
141 140
142int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt, 141int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt,
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index a03e25ca4..d51d8b82f 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -63,6 +63,245 @@ static smallint state;
63/* struct client_config_t client_config is in bb_common_bufsiz1 */ 63/* struct client_config_t client_config is in bb_common_bufsiz1 */
64 64
65 65
66/* Create a random xid */
67static uint32_t random_xid(void)
68{
69 static smallint initialized;
70
71 if (!initialized) {
72 srand(monotonic_us());
73 initialized = 1;
74 }
75 return rand();
76}
77
78/* Initialize the packet with the proper defaults */
79static void init_packet(struct dhcp_packet *packet, char type)
80{
81 udhcp_init_header(packet, type);
82 memcpy(packet->chaddr, client_config.client_mac, 6);
83 if (client_config.clientid)
84 add_option_string(packet->options, client_config.clientid);
85 if (client_config.hostname)
86 add_option_string(packet->options, client_config.hostname);
87 if (client_config.fqdn)
88 add_option_string(packet->options, client_config.fqdn);
89 if (type != DHCPDECLINE
90 && type != DHCPRELEASE
91 && client_config.vendorclass
92 ) {
93 add_option_string(packet->options, client_config.vendorclass);
94 }
95}
96
97/* Add a parameter request list for stubborn DHCP servers. Pull the data
98 * from the struct in options.c. Don't do bounds checking here because it
99 * goes towards the head of the packet. */
100static void add_param_req_option(struct dhcp_packet *packet)
101{
102 uint8_t c;
103 int end = end_option(packet->options);
104 int i, len = 0;
105
106 for (i = 0; (c = dhcp_options[i].code) != 0; i++) {
107 if (( (dhcp_options[i].flags & OPTION_REQ)
108 && !client_config.no_default_options
109 )
110 || (client_config.opt_mask[c >> 3] & (1 << (c & 7)))
111 ) {
112 packet->options[end + OPT_DATA + len] = c;
113 len++;
114 }
115 }
116 if (len) {
117 packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
118 packet->options[end + OPT_LEN] = len;
119 packet->options[end + OPT_DATA + len] = DHCP_END;
120 }
121}
122
123/* RFC 2131
124 * 4.4.4 Use of broadcast and unicast
125 *
126 * The DHCP client broadcasts DHCPDISCOVER, DHCPREQUEST and DHCPINFORM
127 * messages, unless the client knows the address of a DHCP server.
128 * The client unicasts DHCPRELEASE messages to the server. Because
129 * the client is declining the use of the IP address supplied by the server,
130 * the client broadcasts DHCPDECLINE messages.
131 *
132 * When the DHCP client knows the address of a DHCP server, in either
133 * INIT or REBOOTING state, the client may use that address
134 * in the DHCPDISCOVER or DHCPREQUEST rather than the IP broadcast address.
135 * The client may also use unicast to send DHCPINFORM messages
136 * to a known DHCP server. If the client receives no response to DHCP
137 * messages sent to the IP address of a known DHCP server, the DHCP
138 * client reverts to using the IP broadcast address.
139 */
140
141static int raw_bcast_from_client_config_ifindex(struct dhcp_packet *packet)
142{
143 return udhcp_send_raw_packet(packet,
144 /*src*/ INADDR_ANY, CLIENT_PORT,
145 /*dst*/ INADDR_BROADCAST, SERVER_PORT, MAC_BCAST_ADDR,
146 client_config.ifindex);
147}
148
149/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
150static int send_discover(uint32_t xid, uint32_t requested)
151{
152 struct dhcp_packet packet;
153
154 init_packet(&packet, DHCPDISCOVER);
155 packet.xid = xid;
156 if (requested)
157 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
158 /* Explicitly saying that we want RFC-compliant packets helps
159 * some buggy DHCP servers to NOT send bigger packets */
160 add_simple_option(packet.options, DHCP_MAX_SIZE, htons(576));
161 add_param_req_option(&packet);
162
163 bb_info_msg("Sending discover...");
164 return raw_bcast_from_client_config_ifindex(&packet);
165}
166
167/* Broadcast a DHCP request message */
168/* RFC 2131 3.1 paragraph 3:
169 * "The client _broadcasts_ a DHCPREQUEST message..."
170 */
171static int send_select(uint32_t xid, uint32_t server, uint32_t requested)
172{
173 struct dhcp_packet packet;
174 struct in_addr addr;
175
176 init_packet(&packet, DHCPREQUEST);
177 packet.xid = xid;
178 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
179 add_simple_option(packet.options, DHCP_SERVER_ID, server);
180 add_param_req_option(&packet);
181
182 addr.s_addr = requested;
183 bb_info_msg("Sending select for %s...", inet_ntoa(addr));
184 return raw_bcast_from_client_config_ifindex(&packet);
185}
186
187/* Unicast or broadcast a DHCP renew message */
188static int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr)
189{
190 struct dhcp_packet packet;
191
192 init_packet(&packet, DHCPREQUEST);
193 packet.xid = xid;
194 packet.ciaddr = ciaddr;
195 add_param_req_option(&packet);
196
197 bb_info_msg("Sending renew...");
198 if (server)
199 return udhcp_send_kernel_packet(&packet,
200 ciaddr, CLIENT_PORT,
201 server, SERVER_PORT);
202 return raw_bcast_from_client_config_ifindex(&packet);
203}
204
205#if ENABLE_FEATURE_UDHCPC_ARPING
206/* Broadcast a DHCP decline message */
207static int send_decline(uint32_t xid, uint32_t server, uint32_t requested)
208{
209 struct dhcp_packet packet;
210
211 init_packet(&packet, DHCPDECLINE);
212 packet.xid = xid;
213 add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
214 add_simple_option(packet.options, DHCP_SERVER_ID, server);
215
216 bb_info_msg("Sending decline...");
217 return raw_bcast_from_client_config_ifindex(&packet);
218}
219#endif
220
221/* Unicast a DHCP release message */
222static int send_release(uint32_t server, uint32_t ciaddr)
223{
224 struct dhcp_packet packet;
225
226 init_packet(&packet, DHCPRELEASE);
227 packet.xid = random_xid();
228 packet.ciaddr = ciaddr;
229
230 add_simple_option(packet.options, DHCP_SERVER_ID, server);
231
232 bb_info_msg("Sending release...");
233 return udhcp_send_kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
234}
235
236/* Returns -1 on errors that are fatal for the socket, -2 for those that aren't */
237static NOINLINE int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd)
238{
239 int bytes;
240 struct ip_udp_dhcp_packet packet;
241 uint16_t check;
242
243 memset(&packet, 0, sizeof(packet));
244 bytes = safe_read(fd, &packet, sizeof(packet));
245 if (bytes < 0) {
246 log1("Packet read error, ignoring");
247 /* NB: possible down interface, etc. Caller should pause. */
248 return bytes; /* returns -1 */
249 }
250
251 if (bytes < (int) (sizeof(packet.ip) + sizeof(packet.udp))) {
252 log1("Packet is too short, ignoring");
253 return -2;
254 }
255
256 if (bytes < ntohs(packet.ip.tot_len)) {
257 /* packet is bigger than sizeof(packet), we did partial read */
258 log1("Oversized packet, ignoring");
259 return -2;
260 }
261
262 /* ignore any extra garbage bytes */
263 bytes = ntohs(packet.ip.tot_len);
264
265 /* make sure its the right packet for us, and that it passes sanity checks */
266 if (packet.ip.protocol != IPPROTO_UDP || packet.ip.version != IPVERSION
267 || packet.ip.ihl != (sizeof(packet.ip) >> 2)
268 || packet.udp.dest != htons(CLIENT_PORT)
269 /* || bytes > (int) sizeof(packet) - can't happen */
270 || ntohs(packet.udp.len) != (uint16_t)(bytes - sizeof(packet.ip))
271 ) {
272 log1("Unrelated/bogus packet, ignoring");
273 return -2;
274 }
275
276 /* verify IP checksum */
277 check = packet.ip.check;
278 packet.ip.check = 0;
279 if (check != udhcp_checksum(&packet.ip, sizeof(packet.ip))) {
280 log1("Bad IP header checksum, ignoring");
281 return -2;
282 }
283
284 /* verify UDP checksum. IP header has to be modified for this */
285 memset(&packet.ip, 0, offsetof(struct iphdr, protocol));
286 /* ip.xx fields which are not memset: protocol, check, saddr, daddr */
287 packet.ip.tot_len = packet.udp.len; /* yes, this is needed */
288 check = packet.udp.check;
289 packet.udp.check = 0;
290 if (check && check != udhcp_checksum(&packet, bytes)) {
291 log1("Packet with bad UDP checksum received, ignoring");
292 return -2;
293 }
294
295 memcpy(dhcp_pkt, &packet.data, bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
296
297 if (dhcp_pkt->cookie != htonl(DHCP_MAGIC)) {
298 bb_info_msg("Packet with bad magic, ignoring");
299 return -2;
300 }
301 log1("Got valid DHCP packet");
302 udhcp_dump_packet(dhcp_pkt);
303 return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
304}
66 305
67static int udhcp_raw_socket(int ifindex) 306static int udhcp_raw_socket(int ifindex)
68{ 307{
@@ -135,7 +374,6 @@ static int udhcp_raw_socket(int ifindex)
135 return fd; 374 return fd;
136} 375}
137 376
138
139/* just a little helper */ 377/* just a little helper */
140static void change_listen_mode(int new_mode) 378static void change_listen_mode(int new_mode)
141{ 379{
@@ -157,7 +395,6 @@ static void change_listen_mode(int new_mode)
157 /* else LISTEN_NONE: sockfd stays closed */ 395 /* else LISTEN_NONE: sockfd stays closed */
158} 396}
159 397
160
161/* perform a renew */ 398/* perform a renew */
162static void perform_renew(void) 399static void perform_renew(void)
163{ 400{
@@ -181,7 +418,6 @@ static void perform_renew(void)
181 } 418 }
182} 419}
183 420
184
185/* perform a release */ 421/* perform a release */
186static void perform_release(uint32_t requested_ip, uint32_t server_addr) 422static void perform_release(uint32_t requested_ip, uint32_t server_addr)
187{ 423{
@@ -204,7 +440,6 @@ static void perform_release(uint32_t requested_ip, uint32_t server_addr)
204 state = RELEASED; 440 state = RELEASED;
205} 441}
206 442
207
208#if BB_MMU 443#if BB_MMU
209static void client_background(void) 444static void client_background(void)
210{ 445{
@@ -215,7 +450,6 @@ static void client_background(void)
215} 450}
216#endif 451#endif
217 452
218
219static uint8_t* alloc_dhcp_option(int code, const char *str, int extra) 453static uint8_t* alloc_dhcp_option(int code, const char *str, int extra)
220{ 454{
221 uint8_t *storage; 455 uint8_t *storage;
@@ -227,7 +461,6 @@ static uint8_t* alloc_dhcp_option(int code, const char *str, int extra)
227 return storage; 461 return storage;
228} 462}
229 463
230
231int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 464int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
232int udhcpc_main(int argc UNUSED_PARAM, char **argv) 465int udhcpc_main(int argc UNUSED_PARAM, char **argv)
233{ 466{
diff --git a/networking/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
index c9827b6e7..a8861562e 100644
--- a/networking/udhcp/dhcpc.h
+++ b/networking/udhcp/dhcpc.h
@@ -1,5 +1,4 @@
1/* vi: set sw=4 ts=4: */ 1/* vi: set sw=4 ts=4: */
2/* dhcpc.h */
3#ifndef UDHCP_DHCPC_H 2#ifndef UDHCP_DHCPC_H
4#define UDHCP_DHCPC_H 1 3#define UDHCP_DHCPC_H 1
5 4
@@ -30,20 +29,6 @@ struct client_config_t {
30#define CLIENT_PORT 68 29#define CLIENT_PORT 68
31#endif 30#endif
32 31
33
34/*** clientpacket.h ***/
35
36uint32_t random_xid(void) FAST_FUNC;
37int send_discover(uint32_t xid, uint32_t requested) FAST_FUNC;
38int send_select(uint32_t xid, uint32_t server, uint32_t requested) FAST_FUNC;
39#if ENABLE_FEATURE_UDHCPC_ARPING
40int send_decline(uint32_t xid, uint32_t server, uint32_t requested) FAST_FUNC;
41#endif
42int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr) FAST_FUNC;
43int send_release(uint32_t server, uint32_t ciaddr) FAST_FUNC;
44
45int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd) FAST_FUNC;
46
47POP_SAVED_FUNCTION_VISIBILITY 32POP_SAVED_FUNCTION_VISIBILITY
48 33
49#endif 34#endif
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