ReactOS 0.4.15-dev-7842-g558ab78
raw.c
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1
9/*
10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without modification,
14 * are permitted provided that the following conditions are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright notice,
19 * this list of conditions and the following disclaimer in the documentation
20 * and/or other materials provided with the distribution.
21 * 3. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
33 * OF SUCH DAMAGE.
34 *
35 * This file is part of the lwIP TCP/IP stack.
36 *
37 * Author: Adam Dunkels <adam@sics.se>
38 *
39 */
40
41#include "lwip/opt.h"
42
43#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
44
45#include "lwip/def.h"
46#include "lwip/memp.h"
47#include "lwip/ip_addr.h"
48#include "lwip/netif.h"
49#include "lwip/raw.h"
50#include "lwip/stats.h"
51#include "arch/perf.h"
52
53#include <string.h>
54
56static struct raw_pcb *raw_pcbs;
57
75u8_t
76raw_input(struct pbuf *p, struct netif *inp)
77{
78 struct raw_pcb *pcb, *prev;
79 struct ip_hdr *iphdr;
81 u8_t eaten = 0;
82
83 LWIP_UNUSED_ARG(inp);
84
85 iphdr = (struct ip_hdr *)p->payload;
86 proto = IPH_PROTO(iphdr);
87
88 prev = NULL;
89 pcb = raw_pcbs;
90 /* loop through all raw pcbs until the packet is eaten by one */
91 /* this allows multiple pcbs to match against the packet by design */
92 while ((eaten == 0) && (pcb != NULL)) {
93 if ((pcb->protocol == proto) &&
94 (ip_addr_isany(&pcb->local_ip) ||
95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
96#if IP_SOF_BROADCAST_RECV
97 /* broadcast filter? */
99#endif /* IP_SOF_BROADCAST_RECV */
100 {
101 /* receive callback function available? */
102 if (pcb->recv != NULL) {
103 /* the receive callback function did not eat the packet? */
104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
105 /* receive function ate the packet */
106 p = NULL;
107 eaten = 1;
108 if (prev != NULL) {
109 /* move the pcb to the front of raw_pcbs so that is
110 found faster next time */
111 prev->next = pcb->next;
112 pcb->next = raw_pcbs;
113 raw_pcbs = pcb;
114 }
115 }
116 }
117 /* no receive callback function was set for this raw PCB */
118 }
119 /* drop the packet */
120 }
121 prev = pcb;
122 pcb = pcb->next;
123 }
124 return eaten;
125}
126
141err_t
142raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
143{
144 ip_addr_set(&pcb->local_ip, ipaddr);
145 return ERR_OK;
146}
147
161err_t
162raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
163{
164 ip_addr_set(&pcb->remote_ip, ipaddr);
165 return ERR_OK;
166}
167
168
182void
183raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
184{
185 /* remember recv() callback and user data */
186 pcb->recv = recv;
187 pcb->recv_arg = recv_arg;
188}
189
202err_t
203raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
204{
205 err_t err;
206 struct netif *netif;
207 ip_addr_t *src_ip;
208 struct pbuf *q; /* q will be sent down the stack */
209
210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
211
212 /* not enough space to add an IP header to first pbuf in given p chain? */
213 if (pbuf_header(p, IP_HLEN)) {
214 /* allocate header in new pbuf */
216 /* new header pbuf could not be allocated? */
217 if (q == NULL) {
218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
219 return ERR_MEM;
220 }
221 if (p->tot_len != 0) {
222 /* chain header q in front of given pbuf p */
223 pbuf_chain(q, p);
224 }
225 /* { first pbuf q points to header pbuf } */
226 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
227 } else {
228 /* first pbuf q equals given pbuf */
229 q = p;
230 if(pbuf_header(q, -IP_HLEN)) {
231 LWIP_ASSERT("Can't restore header we just removed!", 0);
232 return ERR_MEM;
233 }
234 }
235
236 if ((netif = ip_route(ipaddr)) == NULL) {
237 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
238 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
239 /* free any temporary header pbuf allocated by pbuf_header() */
240 if (q != p) {
241 pbuf_free(q);
242 }
243 return ERR_RTE;
244 }
245
246#if IP_SOF_BROADCAST
247 /* broadcast filter? */
248 if (!ip_get_option(pcb, SOF_BROADCAST) && ip_addr_isbroadcast(ipaddr, netif)) {
249 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
250 /* free any temporary header pbuf allocated by pbuf_header() */
251 if (q != p) {
252 pbuf_free(q);
253 }
254 return ERR_VAL;
255 }
256#endif /* IP_SOF_BROADCAST */
257
258 if (ip_addr_isany(&pcb->local_ip)) {
259 /* use outgoing network interface IP address as source address */
260 src_ip = &(netif->ip_addr);
261 } else {
262 /* use RAW PCB local IP address as source address */
263 src_ip = &(pcb->local_ip);
264 }
265
266 NETIF_SET_HWADDRHINT(netif, &pcb->addr_hint);
267 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
269
270 /* did we chain a header earlier? */
271 if (q != p) {
272 /* free the header */
273 pbuf_free(q);
274 }
275 return err;
276}
277
285err_t
286raw_send(struct raw_pcb *pcb, struct pbuf *p)
287{
288 return raw_sendto(pcb, p, &pcb->remote_ip);
289}
290
299void
300raw_remove(struct raw_pcb *pcb)
301{
302 struct raw_pcb *pcb2;
303 /* pcb to be removed is first in list? */
304 if (raw_pcbs == pcb) {
305 /* make list start at 2nd pcb */
306 raw_pcbs = raw_pcbs->next;
307 /* pcb not 1st in list */
308 } else {
309 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
310 /* find pcb in raw_pcbs list */
311 if (pcb2->next != NULL && pcb2->next == pcb) {
312 /* remove pcb from list */
313 pcb2->next = pcb->next;
314 }
315 }
316 }
317 memp_free(MEMP_RAW_PCB, pcb);
318}
319
330struct raw_pcb *
331raw_new(u8_t proto)
332{
333 struct raw_pcb *pcb;
334
335 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
336
337 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
338 /* could allocate RAW PCB? */
339 if (pcb != NULL) {
340 /* initialize PCB to all zeroes */
341 memset(pcb, 0, sizeof(struct raw_pcb));
342 pcb->protocol = proto;
343 pcb->ttl = RAW_TTL;
344 pcb->next = raw_pcbs;
345 raw_pcbs = pcb;
346 }
347 return pcb;
348}
349
350#endif /* LWIP_RAW */
#define LWIP_UNUSED_ARG(x)
Definition: arch.h:73
#define NULL
Definition: types.h:112
INT WSAAPI recv(IN SOCKET s, OUT CHAR FAR *buf, IN INT len, IN INT flags)
Definition: recv.c:23
signed short s16_t
Definition: cc.h:29
#define U16_F
Definition: cc.h:36
unsigned char u8_t
Definition: cc.h:23
#define ip_get_option(pcb, opt)
Definition: ip.h:205
#define ip_current_src_addr()
Definition: ip.h:200
#define IPH_PROTO(hdr)
Definition: ip.h:153
#define SOF_BROADCAST
Definition: ip.h:102
#define IP_HLEN
Definition: ip.h:50
#define LWIP_DBG_LEVEL_SERIOUS
Definition: debug.h:47
#define LWIP_DEBUGF(debug, message)
Definition: debug.h:95
#define LWIP_DBG_LEVEL_WARNING
Definition: debug.h:46
#define LWIP_ASSERT(message, assertion)
Definition: debug.h:66
#define LWIP_DBG_TRACE
Definition: debug.h:57
#define ERR_MEM
Definition: err.h:53
#define ERR_OK
Definition: err.h:52
#define ERR_RTE
Definition: err.h:56
#define ERR_VAL
Definition: err.h:58
s8_t err_t
Definition: err.h:47
GLdouble GLdouble GLdouble GLdouble q
Definition: gl.h:2063
GLfloat GLfloat p
Definition: glext.h:8902
#define ip_addr_cmp(addr1, addr2)
Definition: ip_addr.h:198
#define ip_addr_isany(addr1)
Definition: ip_addr.h:200
#define ip4_addr1_16(ipaddr)
Definition: ip_addr.h:226
#define ip4_addr2_16(ipaddr)
Definition: ip_addr.h:227
#define ip_addr_set(dest, src)
Definition: ip_addr.h:164
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
Definition: ip_addr.h:64
#define ip_addr_isbroadcast(ipaddr, netif)
Definition: ip_addr.h:202
#define ip4_addr3_16(ipaddr)
Definition: ip_addr.h:228
#define ip4_addr4_16(ipaddr)
Definition: ip_addr.h:229
err_t ip_output_if(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest, u8_t ttl, u8_t tos, u8_t proto, struct netif *netif)
Definition: ip.c:641
ip_addr_t current_iphdr_dest
Definition: ip.c:109
struct netif * ip_route(ip_addr_t *dest)
Definition: ip.c:124
void * memp_malloc(memp_t type)
Definition: memp.c:390
void memp_free(memp_t type, void *mem)
Definition: memp.c:435
#define NETIF_SET_HWADDRHINT(netif, hint)
Definition: netif.h:321
#define RAW_TTL
Definition: opt.h:670
#define RAW_DEBUG
Definition: opt.h:1975
u8_t pbuf_header(struct pbuf *p, s16_t header_size_increment)
Definition: pbuf.c:511
void pbuf_chain(struct pbuf *h, struct pbuf *t)
Definition: pbuf.c:786
struct pbuf * pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type)
Definition: pbuf.c:207
u8_t pbuf_free(struct pbuf *p)
Definition: pbuf.c:618
@ PBUF_RAM
Definition: pbuf.h:58
@ PBUF_IP
Definition: pbuf.h:52
#define err(...)
#define memset(x, y, z)
Definition: compat.h:39
struct define * next
Definition: compiler.c:65
Definition: ip.h:116
Definition: netif.h:136
ip_addr_t ip_addr
Definition: netif.h:141
Definition: pbuf.h:79