Donatien Garnier / lwip_ppp_ethernet

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Dependents:   NetworkingCoreLib

src/core/raw.c@2:1a87f74b8e3b, 2012-05-25 (annotated)

Committer:
donatien
Date:
Fri May 25 08:56:35 2012 +0000
Revision:
2:1a87f74b8e3b
Parent:
0:8e01dca41002 
Removed compilation of EMAC driver when using PPP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /**
donatien 0:8e01dca41002 2 * @file
donatien 0:8e01dca41002 3 * Implementation of raw protocol PCBs for low-level handling of
donatien 0:8e01dca41002 4 * different types of protocols besides (or overriding) those
donatien 0:8e01dca41002 5 * already available in lwIP.
donatien 0:8e01dca41002 6 *
donatien 0:8e01dca41002 7 */
donatien 0:8e01dca41002 8
donatien 0:8e01dca41002 9 /*
donatien 0:8e01dca41002 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 11 * All rights reserved.
donatien 0:8e01dca41002 12 *
donatien 0:8e01dca41002 13 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 14 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 15 *
donatien 0:8e01dca41002 16 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 17 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 19 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 20 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 21 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 22 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 23 *
donatien 0:8e01dca41002 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 33 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 34 *
donatien 0:8e01dca41002 35 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 36 *
donatien 0:8e01dca41002 37 * Author: Adam Dunkels <adam@sics.se>
donatien 0:8e01dca41002 38 *
donatien 0:8e01dca41002 39 */
donatien 0:8e01dca41002 40
donatien 0:8e01dca41002 41 #include "lwip/opt.h"
donatien 0:8e01dca41002 42
donatien 0:8e01dca41002 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
donatien 0:8e01dca41002 44
donatien 0:8e01dca41002 45 #include "lwip/def.h"
donatien 0:8e01dca41002 46 #include "lwip/memp.h"
donatien 0:8e01dca41002 47 #include "lwip/ip_addr.h"
donatien 0:8e01dca41002 48 #include "lwip/netif.h"
donatien 0:8e01dca41002 49 #include "lwip/raw.h"
donatien 0:8e01dca41002 50 #include "lwip/stats.h"
donatien 0:8e01dca41002 51 #include "arch/perf.h"
donatien 0:8e01dca41002 52
donatien 0:8e01dca41002 53 #include <string.h>
donatien 0:8e01dca41002 54
donatien 0:8e01dca41002 55 /** The list of RAW PCBs */
donatien 0:8e01dca41002 56 static struct raw_pcb *raw_pcbs;
donatien 0:8e01dca41002 57
donatien 0:8e01dca41002 58 /**
donatien 0:8e01dca41002 59 * Determine if in incoming IP packet is covered by a RAW PCB
donatien 0:8e01dca41002 60 * and if so, pass it to a user-provided receive callback function.
donatien 0:8e01dca41002 61 *
donatien 0:8e01dca41002 62 * Given an incoming IP datagram (as a chain of pbufs) this function
donatien 0:8e01dca41002 63 * finds a corresponding RAW PCB and calls the corresponding receive
donatien 0:8e01dca41002 64 * callback function.
donatien 0:8e01dca41002 65 *
donatien 0:8e01dca41002 66 * @param p pbuf to be demultiplexed to a RAW PCB.
donatien 0:8e01dca41002 67 * @param inp network interface on which the datagram was received.
donatien 0:8e01dca41002 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
donatien 0:8e01dca41002 69 * callback function. The caller MAY NOT not reference the
donatien 0:8e01dca41002 70 * packet any longer, and MAY NOT call pbuf_free().
donatien 0:8e01dca41002 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
donatien 0:8e01dca41002 72 * caller).
donatien 0:8e01dca41002 73 *
donatien 0:8e01dca41002 74 */
donatien 0:8e01dca41002 75 u8_t
donatien 0:8e01dca41002 76 raw_input(struct pbuf *p, struct netif *inp)
donatien 0:8e01dca41002 77 {
donatien 0:8e01dca41002 78 struct raw_pcb *pcb, *prev;
donatien 0:8e01dca41002 79 struct ip_hdr *iphdr;
donatien 0:8e01dca41002 80 s16_t proto;
donatien 0:8e01dca41002 81 u8_t eaten = 0;
donatien 0:8e01dca41002 82
donatien 0:8e01dca41002 83 LWIP_UNUSED_ARG(inp);
donatien 0:8e01dca41002 84
donatien 0:8e01dca41002 85 iphdr = (struct ip_hdr *)p->payload;
donatien 0:8e01dca41002 86 proto = IPH_PROTO(iphdr);
donatien 0:8e01dca41002 87
donatien 0:8e01dca41002 88 prev = NULL;
donatien 0:8e01dca41002 89 pcb = raw_pcbs;
donatien 0:8e01dca41002 90 /* loop through all raw pcbs until the packet is eaten by one */
donatien 0:8e01dca41002 91 /* this allows multiple pcbs to match against the packet by design */
donatien 0:8e01dca41002 92 while ((eaten == 0) && (pcb != NULL)) {
donatien 0:8e01dca41002 93 if ((pcb->protocol == proto) &&
donatien 0:8e01dca41002 94 (ip_addr_isany(&pcb->local_ip) ||
donatien 0:8e01dca41002 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
donatien 0:8e01dca41002 96 #if IP_SOF_BROADCAST_RECV
donatien 0:8e01dca41002 97 /* broadcast filter? */
donatien 0:8e01dca41002 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
donatien 0:8e01dca41002 99 #endif /* IP_SOF_BROADCAST_RECV */
donatien 0:8e01dca41002 100 {
donatien 0:8e01dca41002 101 /* receive callback function available? */
donatien 0:8e01dca41002 102 if (pcb->recv != NULL) {
donatien 0:8e01dca41002 103 /* the receive callback function did not eat the packet? */
donatien 0:8e01dca41002 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
donatien 0:8e01dca41002 105 /* receive function ate the packet */
donatien 0:8e01dca41002 106 p = NULL;
donatien 0:8e01dca41002 107 eaten = 1;
donatien 0:8e01dca41002 108 if (prev != NULL) {
donatien 0:8e01dca41002 109 /* move the pcb to the front of raw_pcbs so that is
donatien 0:8e01dca41002 110 found faster next time */
donatien 0:8e01dca41002 111 prev->next = pcb->next;
donatien 0:8e01dca41002 112 pcb->next = raw_pcbs;
donatien 0:8e01dca41002 113 raw_pcbs = pcb;
donatien 0:8e01dca41002 114 }
donatien 0:8e01dca41002 115 }
donatien 0:8e01dca41002 116 }
donatien 0:8e01dca41002 117 /* no receive callback function was set for this raw PCB */
donatien 0:8e01dca41002 118 }
donatien 0:8e01dca41002 119 /* drop the packet */
donatien 0:8e01dca41002 120 }
donatien 0:8e01dca41002 121 prev = pcb;
donatien 0:8e01dca41002 122 pcb = pcb->next;
donatien 0:8e01dca41002 123 }
donatien 0:8e01dca41002 124 return eaten;
donatien 0:8e01dca41002 125 }
donatien 0:8e01dca41002 126
donatien 0:8e01dca41002 127 /**
donatien 0:8e01dca41002 128 * Bind a RAW PCB.
donatien 0:8e01dca41002 129 *
donatien 0:8e01dca41002 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
donatien 0:8e01dca41002 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
donatien 0:8e01dca41002 132 * bind to all local interfaces.
donatien 0:8e01dca41002 133 *
donatien 0:8e01dca41002 134 * @return lwIP error code.
donatien 0:8e01dca41002 135 * - ERR_OK. Successful. No error occured.
donatien 0:8e01dca41002 136 * - ERR_USE. The specified IP address is already bound to by
donatien 0:8e01dca41002 137 * another RAW PCB.
donatien 0:8e01dca41002 138 *
donatien 0:8e01dca41002 139 * @see raw_disconnect()
donatien 0:8e01dca41002 140 */
donatien 0:8e01dca41002 141 err_t
donatien 0:8e01dca41002 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
donatien 0:8e01dca41002 143 {
donatien 0:8e01dca41002 144 ip_addr_set(&pcb->local_ip, ipaddr);
donatien 0:8e01dca41002 145 return ERR_OK;
donatien 0:8e01dca41002 146 }
donatien 0:8e01dca41002 147
donatien 0:8e01dca41002 148 /**
donatien 0:8e01dca41002 149 * Connect an RAW PCB. This function is required by upper layers
donatien 0:8e01dca41002 150 * of lwip. Using the raw api you could use raw_sendto() instead
donatien 0:8e01dca41002 151 *
donatien 0:8e01dca41002 152 * This will associate the RAW PCB with the remote address.
donatien 0:8e01dca41002 153 *
donatien 0:8e01dca41002 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
donatien 0:8e01dca41002 155 * @param ipaddr remote IP address to connect with.
donatien 0:8e01dca41002 156 *
donatien 0:8e01dca41002 157 * @return lwIP error code
donatien 0:8e01dca41002 158 *
donatien 0:8e01dca41002 159 * @see raw_disconnect() and raw_sendto()
donatien 0:8e01dca41002 160 */
donatien 0:8e01dca41002 161 err_t
donatien 0:8e01dca41002 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
donatien 0:8e01dca41002 163 {
donatien 0:8e01dca41002 164 ip_addr_set(&pcb->remote_ip, ipaddr);
donatien 0:8e01dca41002 165 return ERR_OK;
donatien 0:8e01dca41002 166 }
donatien 0:8e01dca41002 167
donatien 0:8e01dca41002 168
donatien 0:8e01dca41002 169 /**
donatien 0:8e01dca41002 170 * Set the callback function for received packets that match the
donatien 0:8e01dca41002 171 * raw PCB's protocol and binding.
donatien 0:8e01dca41002 172 *
donatien 0:8e01dca41002 173 * The callback function MUST either
donatien 0:8e01dca41002 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
donatien 0:8e01dca41002 175 * packet will not be passed to other raw PCBs or other protocol layers.
donatien 0:8e01dca41002 176 * - not free the packet, and return zero. The packet will be matched
donatien 0:8e01dca41002 177 * against further PCBs and/or forwarded to another protocol layers.
donatien 0:8e01dca41002 178 *
donatien 0:8e01dca41002 179 * @return non-zero if the packet was free()d, zero if the packet remains
donatien 0:8e01dca41002 180 * available for others.
donatien 0:8e01dca41002 181 */
donatien 0:8e01dca41002 182 void
donatien 0:8e01dca41002 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
donatien 0:8e01dca41002 184 {
donatien 0:8e01dca41002 185 /* remember recv() callback and user data */
donatien 0:8e01dca41002 186 pcb->recv = recv;
donatien 0:8e01dca41002 187 pcb->recv_arg = recv_arg;
donatien 0:8e01dca41002 188 }
donatien 0:8e01dca41002 189
donatien 0:8e01dca41002 190 /**
donatien 0:8e01dca41002 191 * Send the raw IP packet to the given address. Note that actually you cannot
donatien 0:8e01dca41002 192 * modify the IP headers (this is inconsistent with the receive callback where
donatien 0:8e01dca41002 193 * you actually get the IP headers), you can only specify the IP payload here.
donatien 0:8e01dca41002 194 * It requires some more changes in lwIP. (there will be a raw_send() function
donatien 0:8e01dca41002 195 * then.)
donatien 0:8e01dca41002 196 *
donatien 0:8e01dca41002 197 * @param pcb the raw pcb which to send
donatien 0:8e01dca41002 198 * @param p the IP payload to send
donatien 0:8e01dca41002 199 * @param ipaddr the destination address of the IP packet
donatien 0:8e01dca41002 200 *
donatien 0:8e01dca41002 201 */
donatien 0:8e01dca41002 202 err_t
donatien 0:8e01dca41002 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
donatien 0:8e01dca41002 204 {
donatien 0:8e01dca41002 205 err_t err;
donatien 0:8e01dca41002 206 struct netif *netif;
donatien 0:8e01dca41002 207 ip_addr_t *src_ip;
donatien 0:8e01dca41002 208 struct pbuf *q; /* q will be sent down the stack */
donatien 0:8e01dca41002 209
donatien 0:8e01dca41002 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
donatien 0:8e01dca41002 211
donatien 0:8e01dca41002 212 /* not enough space to add an IP header to first pbuf in given p chain? */
donatien 0:8e01dca41002 213 if (pbuf_header(p, IP_HLEN)) {
donatien 0:8e01dca41002 214 /* allocate header in new pbuf */
donatien 0:8e01dca41002 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
donatien 0:8e01dca41002 216 /* new header pbuf could not be allocated? */
donatien 0:8e01dca41002 217 if (q == NULL) {
donatien 0:8e01dca41002 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
donatien 0:8e01dca41002 219 return ERR_MEM;
donatien 0:8e01dca41002 220 }
donatien 0:8e01dca41002 221 if (p->tot_len != 0) {
donatien 0:8e01dca41002 222 /* chain header q in front of given pbuf p */
donatien 0:8e01dca41002 223 pbuf_chain(q, p);
donatien 0:8e01dca41002 224 }
donatien 0:8e01dca41002 225 /* { first pbuf q points to header pbuf } */
donatien 0:8e01dca41002 226 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
donatien 0:8e01dca41002 227 } else {
donatien 0:8e01dca41002 228 /* first pbuf q equals given pbuf */
donatien 0:8e01dca41002 229 q = p;
donatien 0:8e01dca41002 230 if(pbuf_header(q, -IP_HLEN)) {
donatien 0:8e01dca41002 231 LWIP_ASSERT("Can't restore header we just removed!", 0);
donatien 0:8e01dca41002 232 return ERR_MEM;
donatien 0:8e01dca41002 233 }
donatien 0:8e01dca41002 234 }
donatien 0:8e01dca41002 235
donatien 0:8e01dca41002 236 if ((netif = ip_route(ipaddr)) == NULL) {
donatien 0:8e01dca41002 237 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
donatien 0:8e01dca41002 238 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
donatien 0:8e01dca41002 239 /* free any temporary header pbuf allocated by pbuf_header() */
donatien 0:8e01dca41002 240 if (q != p) {
donatien 0:8e01dca41002 241 pbuf_free(q);
donatien 0:8e01dca41002 242 }
donatien 0:8e01dca41002 243 return ERR_RTE;
donatien 0:8e01dca41002 244 }
donatien 0:8e01dca41002 245
donatien 0:8e01dca41002 246 #if IP_SOF_BROADCAST
donatien 0:8e01dca41002 247 /* broadcast filter? */
donatien 0:8e01dca41002 248 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
donatien 0:8e01dca41002 249 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
donatien 0:8e01dca41002 250 /* free any temporary header pbuf allocated by pbuf_header() */
donatien 0:8e01dca41002 251 if (q != p) {
donatien 0:8e01dca41002 252 pbuf_free(q);
donatien 0:8e01dca41002 253 }
donatien 0:8e01dca41002 254 return ERR_VAL;
donatien 0:8e01dca41002 255 }
donatien 0:8e01dca41002 256 #endif /* IP_SOF_BROADCAST */
donatien 0:8e01dca41002 257
donatien 0:8e01dca41002 258 if (ip_addr_isany(&pcb->local_ip)) {
donatien 0:8e01dca41002 259 /* use outgoing network interface IP address as source address */
donatien 0:8e01dca41002 260 src_ip = &(netif->ip_addr);
donatien 0:8e01dca41002 261 } else {
donatien 0:8e01dca41002 262 /* use RAW PCB local IP address as source address */
donatien 0:8e01dca41002 263 src_ip = &(pcb->local_ip);
donatien 0:8e01dca41002 264 }
donatien 0:8e01dca41002 265
donatien 0:8e01dca41002 266 #if LWIP_NETIF_HWADDRHINT
donatien 0:8e01dca41002 267 netif->addr_hint = &(pcb->addr_hint);
donatien 0:8e01dca41002 268 #endif /* LWIP_NETIF_HWADDRHINT*/
donatien 0:8e01dca41002 269 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
donatien 0:8e01dca41002 270 #if LWIP_NETIF_HWADDRHINT
donatien 0:8e01dca41002 271 netif->addr_hint = NULL;
donatien 0:8e01dca41002 272 #endif /* LWIP_NETIF_HWADDRHINT*/
donatien 0:8e01dca41002 273
donatien 0:8e01dca41002 274 /* did we chain a header earlier? */
donatien 0:8e01dca41002 275 if (q != p) {
donatien 0:8e01dca41002 276 /* free the header */
donatien 0:8e01dca41002 277 pbuf_free(q);
donatien 0:8e01dca41002 278 }
donatien 0:8e01dca41002 279 return err;
donatien 0:8e01dca41002 280 }
donatien 0:8e01dca41002 281
donatien 0:8e01dca41002 282 /**
donatien 0:8e01dca41002 283 * Send the raw IP packet to the address given by raw_connect()
donatien 0:8e01dca41002 284 *
donatien 0:8e01dca41002 285 * @param pcb the raw pcb which to send
donatien 0:8e01dca41002 286 * @param p the IP payload to send
donatien 0:8e01dca41002 287 *
donatien 0:8e01dca41002 288 */
donatien 0:8e01dca41002 289 err_t
donatien 0:8e01dca41002 290 raw_send(struct raw_pcb *pcb, struct pbuf *p)
donatien 0:8e01dca41002 291 {
donatien 0:8e01dca41002 292 return raw_sendto(pcb, p, &pcb->remote_ip);
donatien 0:8e01dca41002 293 }
donatien 0:8e01dca41002 294
donatien 0:8e01dca41002 295 /**
donatien 0:8e01dca41002 296 * Remove an RAW PCB.
donatien 0:8e01dca41002 297 *
donatien 0:8e01dca41002 298 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
donatien 0:8e01dca41002 299 * RAW PCB's and the data structure is freed from memory.
donatien 0:8e01dca41002 300 *
donatien 0:8e01dca41002 301 * @see raw_new()
donatien 0:8e01dca41002 302 */
donatien 0:8e01dca41002 303 void
donatien 0:8e01dca41002 304 raw_remove(struct raw_pcb *pcb)
donatien 0:8e01dca41002 305 {
donatien 0:8e01dca41002 306 struct raw_pcb *pcb2;
donatien 0:8e01dca41002 307 /* pcb to be removed is first in list? */
donatien 0:8e01dca41002 308 if (raw_pcbs == pcb) {
donatien 0:8e01dca41002 309 /* make list start at 2nd pcb */
donatien 0:8e01dca41002 310 raw_pcbs = raw_pcbs->next;
donatien 0:8e01dca41002 311 /* pcb not 1st in list */
donatien 0:8e01dca41002 312 } else {
donatien 0:8e01dca41002 313 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
donatien 0:8e01dca41002 314 /* find pcb in raw_pcbs list */
donatien 0:8e01dca41002 315 if (pcb2->next != NULL && pcb2->next == pcb) {
donatien 0:8e01dca41002 316 /* remove pcb from list */
donatien 0:8e01dca41002 317 pcb2->next = pcb->next;
donatien 0:8e01dca41002 318 }
donatien 0:8e01dca41002 319 }
donatien 0:8e01dca41002 320 }
donatien 0:8e01dca41002 321 memp_free(MEMP_RAW_PCB, pcb);
donatien 0:8e01dca41002 322 }
donatien 0:8e01dca41002 323
donatien 0:8e01dca41002 324 /**
donatien 0:8e01dca41002 325 * Create a RAW PCB.
donatien 0:8e01dca41002 326 *
donatien 0:8e01dca41002 327 * @return The RAW PCB which was created. NULL if the PCB data structure
donatien 0:8e01dca41002 328 * could not be allocated.
donatien 0:8e01dca41002 329 *
donatien 0:8e01dca41002 330 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
donatien 0:8e01dca41002 331 *
donatien 0:8e01dca41002 332 * @see raw_remove()
donatien 0:8e01dca41002 333 */
donatien 0:8e01dca41002 334 struct raw_pcb *
donatien 0:8e01dca41002 335 raw_new(u8_t proto)
donatien 0:8e01dca41002 336 {
donatien 0:8e01dca41002 337 struct raw_pcb *pcb;
donatien 0:8e01dca41002 338
donatien 0:8e01dca41002 339 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
donatien 0:8e01dca41002 340
donatien 0:8e01dca41002 341 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
donatien 0:8e01dca41002 342 /* could allocate RAW PCB? */
donatien 0:8e01dca41002 343 if (pcb != NULL) {
donatien 0:8e01dca41002 344 /* initialize PCB to all zeroes */
donatien 0:8e01dca41002 345 memset(pcb, 0, sizeof(struct raw_pcb));
donatien 0:8e01dca41002 346 pcb->protocol = proto;
donatien 0:8e01dca41002 347 pcb->ttl = RAW_TTL;
donatien 0:8e01dca41002 348 pcb->next = raw_pcbs;
donatien 0:8e01dca41002 349 raw_pcbs = pcb;
donatien 0:8e01dca41002 350 }
donatien 0:8e01dca41002 351 return pcb;
donatien 0:8e01dca41002 352 }
donatien 0:8e01dca41002 353
donatien 0:8e01dca41002 354 #endif /* LWIP_RAW */