Mihail Stoyanov / HTTPServer

My fork of the HTTPServer (working)

Dependents:   DGWWebServer LAN2

Core/lwIP/core/raw.c@0:7a64fbb4069d, 2012-08-06 (annotated)

Committer:
screamer
Date:
Mon Aug 06 09:23:14 2012 +0000
Revision:
0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:7a64fbb4069d 1 /**
screamer 0:7a64fbb4069d 2 * @file
screamer 0:7a64fbb4069d 3 * Implementation of raw protocol PCBs for low-level handling of
screamer 0:7a64fbb4069d 4 * different types of protocols besides (or overriding) those
screamer 0:7a64fbb4069d 5 * already available in lwIP.
screamer 0:7a64fbb4069d 6 *
screamer 0:7a64fbb4069d 7 */
screamer 0:7a64fbb4069d 8
screamer 0:7a64fbb4069d 9 /*
screamer 0:7a64fbb4069d 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
screamer 0:7a64fbb4069d 11 * All rights reserved.
screamer 0:7a64fbb4069d 12 *
screamer 0:7a64fbb4069d 13 * Redistribution and use in source and binary forms, with or without modification,
screamer 0:7a64fbb4069d 14 * are permitted provided that the following conditions are met:
screamer 0:7a64fbb4069d 15 *
screamer 0:7a64fbb4069d 16 * 1. Redistributions of source code must retain the above copyright notice,
screamer 0:7a64fbb4069d 17 * this list of conditions and the following disclaimer.
screamer 0:7a64fbb4069d 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
screamer 0:7a64fbb4069d 19 * this list of conditions and the following disclaimer in the documentation
screamer 0:7a64fbb4069d 20 * and/or other materials provided with the distribution.
screamer 0:7a64fbb4069d 21 * 3. The name of the author may not be used to endorse or promote products
screamer 0:7a64fbb4069d 22 * derived from this software without specific prior written permission.
screamer 0:7a64fbb4069d 23 *
screamer 0:7a64fbb4069d 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
screamer 0:7a64fbb4069d 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
screamer 0:7a64fbb4069d 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
screamer 0:7a64fbb4069d 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
screamer 0:7a64fbb4069d 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
screamer 0:7a64fbb4069d 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
screamer 0:7a64fbb4069d 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
screamer 0:7a64fbb4069d 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
screamer 0:7a64fbb4069d 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
screamer 0:7a64fbb4069d 33 * OF SUCH DAMAGE.
screamer 0:7a64fbb4069d 34 *
screamer 0:7a64fbb4069d 35 * This file is part of the lwIP TCP/IP stack.
screamer 0:7a64fbb4069d 36 *
screamer 0:7a64fbb4069d 37 * Author: Adam Dunkels <adam@sics.se>
screamer 0:7a64fbb4069d 38 *
screamer 0:7a64fbb4069d 39 */
screamer 0:7a64fbb4069d 40
screamer 0:7a64fbb4069d 41 #include "lwip/opt.h"
screamer 0:7a64fbb4069d 42
screamer 0:7a64fbb4069d 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
screamer 0:7a64fbb4069d 44
screamer 0:7a64fbb4069d 45 #include "lwip/def.h"
screamer 0:7a64fbb4069d 46 #include "lwip/memp.h"
screamer 0:7a64fbb4069d 47 #include "lwip/inet.h"
screamer 0:7a64fbb4069d 48 #include "lwip/ip_addr.h"
screamer 0:7a64fbb4069d 49 #include "lwip/netif.h"
screamer 0:7a64fbb4069d 50 #include "lwip/raw.h"
screamer 0:7a64fbb4069d 51 #include "lwip/stats.h"
screamer 0:7a64fbb4069d 52 #include "lwip/snmp.h"
screamer 0:7a64fbb4069d 53 #include "arch/perf.h"
screamer 0:7a64fbb4069d 54
screamer 0:7a64fbb4069d 55 #include <string.h>
screamer 0:7a64fbb4069d 56
screamer 0:7a64fbb4069d 57 /** The list of RAW PCBs */
screamer 0:7a64fbb4069d 58 static struct raw_pcb *raw_pcbs;
screamer 0:7a64fbb4069d 59
screamer 0:7a64fbb4069d 60 /**
screamer 0:7a64fbb4069d 61 * Determine if in incoming IP packet is covered by a RAW PCB
screamer 0:7a64fbb4069d 62 * and if so, pass it to a user-provided receive callback function.
screamer 0:7a64fbb4069d 63 *
screamer 0:7a64fbb4069d 64 * Given an incoming IP datagram (as a chain of pbufs) this function
screamer 0:7a64fbb4069d 65 * finds a corresponding RAW PCB and calls the corresponding receive
screamer 0:7a64fbb4069d 66 * callback function.
screamer 0:7a64fbb4069d 67 *
screamer 0:7a64fbb4069d 68 * @param p pbuf to be demultiplexed to a RAW PCB.
screamer 0:7a64fbb4069d 69 * @param inp network interface on which the datagram was received.
screamer 0:7a64fbb4069d 70 * @return - 1 if the packet has been eaten by a RAW PCB receive
screamer 0:7a64fbb4069d 71 * callback function. The caller MAY NOT not reference the
screamer 0:7a64fbb4069d 72 * packet any longer, and MAY NOT call pbuf_free().
screamer 0:7a64fbb4069d 73 * @return - 0 if packet is not eaten (pbuf is still referenced by the
screamer 0:7a64fbb4069d 74 * caller).
screamer 0:7a64fbb4069d 75 *
screamer 0:7a64fbb4069d 76 */
screamer 0:7a64fbb4069d 77 u8_t
screamer 0:7a64fbb4069d 78 raw_input(struct pbuf *p, struct netif *inp)
screamer 0:7a64fbb4069d 79 {
screamer 0:7a64fbb4069d 80 struct raw_pcb *pcb, *prev;
screamer 0:7a64fbb4069d 81 struct ip_hdr *iphdr;
screamer 0:7a64fbb4069d 82 s16_t proto;
screamer 0:7a64fbb4069d 83 u8_t eaten = 0;
screamer 0:7a64fbb4069d 84
screamer 0:7a64fbb4069d 85 LWIP_UNUSED_ARG(inp);
screamer 0:7a64fbb4069d 86
screamer 0:7a64fbb4069d 87 iphdr = (struct ip_hdr *)(p->payload); // static_cast<struct ip_hdr *>(x)
screamer 0:7a64fbb4069d 88 proto = IPH_PROTO(iphdr);
screamer 0:7a64fbb4069d 89
screamer 0:7a64fbb4069d 90 prev = NULL;
screamer 0:7a64fbb4069d 91 pcb = raw_pcbs;
screamer 0:7a64fbb4069d 92 /* loop through all raw pcbs until the packet is eaten by one */
screamer 0:7a64fbb4069d 93 /* this allows multiple pcbs to match against the packet by design */
screamer 0:7a64fbb4069d 94 while ((eaten == 0) && (pcb != NULL)) {
screamer 0:7a64fbb4069d 95 if (pcb->protocol == proto) {
screamer 0:7a64fbb4069d 96 /* receive callback function available? */
screamer 0:7a64fbb4069d 97 if (pcb->recv != NULL) {
screamer 0:7a64fbb4069d 98 /* the receive callback function did not eat the packet? */
screamer 0:7a64fbb4069d 99 struct ip_addr iphdrsrc;
screamer 0:7a64fbb4069d 100 iphdrsrc.addr = iphdr->src.addr;
screamer 0:7a64fbb4069d 101 if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdrsrc)) != 0)
screamer 0:7a64fbb4069d 102 {
screamer 0:7a64fbb4069d 103 /* receive function ate the packet */
screamer 0:7a64fbb4069d 104 p = NULL;
screamer 0:7a64fbb4069d 105 eaten = 1;
screamer 0:7a64fbb4069d 106 if (prev != NULL) {
screamer 0:7a64fbb4069d 107 /* move the pcb to the front of raw_pcbs so that is
screamer 0:7a64fbb4069d 108 found faster next time */
screamer 0:7a64fbb4069d 109 prev->next = pcb->next;
screamer 0:7a64fbb4069d 110 pcb->next = raw_pcbs;
screamer 0:7a64fbb4069d 111 raw_pcbs = pcb;
screamer 0:7a64fbb4069d 112 }
screamer 0:7a64fbb4069d 113 }
screamer 0:7a64fbb4069d 114 }
screamer 0:7a64fbb4069d 115 /* no receive callback function was set for this raw PCB */
screamer 0:7a64fbb4069d 116 /* drop the packet */
screamer 0:7a64fbb4069d 117 }
screamer 0:7a64fbb4069d 118 prev = pcb;
screamer 0:7a64fbb4069d 119 pcb = pcb->next;
screamer 0:7a64fbb4069d 120 }
screamer 0:7a64fbb4069d 121 return eaten;
screamer 0:7a64fbb4069d 122 }
screamer 0:7a64fbb4069d 123
screamer 0:7a64fbb4069d 124 /**
screamer 0:7a64fbb4069d 125 * Bind a RAW PCB.
screamer 0:7a64fbb4069d 126 *
screamer 0:7a64fbb4069d 127 * @param pcb RAW PCB to be bound with a local address ipaddr.
screamer 0:7a64fbb4069d 128 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
screamer 0:7a64fbb4069d 129 * bind to all local interfaces.
screamer 0:7a64fbb4069d 130 *
screamer 0:7a64fbb4069d 131 * @return lwIP error code.
screamer 0:7a64fbb4069d 132 * - ERR_OK. Successful. No error occured.
screamer 0:7a64fbb4069d 133 * - ERR_USE. The specified IP address is already bound to by
screamer 0:7a64fbb4069d 134 * another RAW PCB.
screamer 0:7a64fbb4069d 135 *
screamer 0:7a64fbb4069d 136 * @see raw_disconnect()
screamer 0:7a64fbb4069d 137 */
screamer 0:7a64fbb4069d 138 err_t
screamer 0:7a64fbb4069d 139 raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr)
screamer 0:7a64fbb4069d 140 {
screamer 0:7a64fbb4069d 141 ip_addr_set(&pcb->local_ip, ipaddr);
screamer 0:7a64fbb4069d 142 return ERR_OK;
screamer 0:7a64fbb4069d 143 }
screamer 0:7a64fbb4069d 144
screamer 0:7a64fbb4069d 145 /**
screamer 0:7a64fbb4069d 146 * Connect an RAW PCB. This function is required by upper layers
screamer 0:7a64fbb4069d 147 * of lwip. Using the raw api you could use raw_sendto() instead
screamer 0:7a64fbb4069d 148 *
screamer 0:7a64fbb4069d 149 * This will associate the RAW PCB with the remote address.
screamer 0:7a64fbb4069d 150 *
screamer 0:7a64fbb4069d 151 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
screamer 0:7a64fbb4069d 152 * @param ipaddr remote IP address to connect with.
screamer 0:7a64fbb4069d 153 *
screamer 0:7a64fbb4069d 154 * @return lwIP error code
screamer 0:7a64fbb4069d 155 *
screamer 0:7a64fbb4069d 156 * @see raw_disconnect() and raw_sendto()
screamer 0:7a64fbb4069d 157 */
screamer 0:7a64fbb4069d 158 err_t
screamer 0:7a64fbb4069d 159 raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr)
screamer 0:7a64fbb4069d 160 {
screamer 0:7a64fbb4069d 161 ip_addr_set(&pcb->remote_ip, ipaddr);
screamer 0:7a64fbb4069d 162 return ERR_OK;
screamer 0:7a64fbb4069d 163 }
screamer 0:7a64fbb4069d 164
screamer 0:7a64fbb4069d 165
screamer 0:7a64fbb4069d 166 /**
screamer 0:7a64fbb4069d 167 * Set the callback function for received packets that match the
screamer 0:7a64fbb4069d 168 * raw PCB's protocol and binding.
screamer 0:7a64fbb4069d 169 *
screamer 0:7a64fbb4069d 170 * The callback function MUST either
screamer 0:7a64fbb4069d 171 * - eat the packet by calling pbuf_free() and returning non-zero. The
screamer 0:7a64fbb4069d 172 * packet will not be passed to other raw PCBs or other protocol layers.
screamer 0:7a64fbb4069d 173 * - not free the packet, and return zero. The packet will be matched
screamer 0:7a64fbb4069d 174 * against further PCBs and/or forwarded to another protocol layers.
screamer 0:7a64fbb4069d 175 *
screamer 0:7a64fbb4069d 176 * @return non-zero if the packet was free()d, zero if the packet remains
screamer 0:7a64fbb4069d 177 * available for others.
screamer 0:7a64fbb4069d 178 */
screamer 0:7a64fbb4069d 179 void
screamer 0:7a64fbb4069d 180 raw_recv(struct raw_pcb *pcb,
screamer 0:7a64fbb4069d 181 u8_t (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p,
screamer 0:7a64fbb4069d 182 struct ip_addr *addr),
screamer 0:7a64fbb4069d 183 void *recv_arg)
screamer 0:7a64fbb4069d 184 {
screamer 0:7a64fbb4069d 185 /* remember recv() callback and user data */
screamer 0:7a64fbb4069d 186 pcb->recv = recv;
screamer 0:7a64fbb4069d 187 pcb->recv_arg = recv_arg;
screamer 0:7a64fbb4069d 188 }
screamer 0:7a64fbb4069d 189
screamer 0:7a64fbb4069d 190 /**
screamer 0:7a64fbb4069d 191 * Send the raw IP packet to the given address. Note that actually you cannot
screamer 0:7a64fbb4069d 192 * modify the IP headers (this is inconsistent with the receive callback where
screamer 0:7a64fbb4069d 193 * you actually get the IP headers), you can only specify the IP payload here.
screamer 0:7a64fbb4069d 194 * It requires some more changes in lwIP. (there will be a raw_send() function
screamer 0:7a64fbb4069d 195 * then.)
screamer 0:7a64fbb4069d 196 *
screamer 0:7a64fbb4069d 197 * @param pcb the raw pcb which to send
screamer 0:7a64fbb4069d 198 * @param p the IP payload to send
screamer 0:7a64fbb4069d 199 * @param ipaddr the destination address of the IP packet
screamer 0:7a64fbb4069d 200 *
screamer 0:7a64fbb4069d 201 */
screamer 0:7a64fbb4069d 202 err_t
screamer 0:7a64fbb4069d 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr)
screamer 0:7a64fbb4069d 204 {
screamer 0:7a64fbb4069d 205 err_t err;
screamer 0:7a64fbb4069d 206 struct netif *netif;
screamer 0:7a64fbb4069d 207 struct ip_addr *src_ip;
screamer 0:7a64fbb4069d 208 struct pbuf *q; /* q will be sent down the stack */
screamer 0:7a64fbb4069d 209
screamer 0:7a64fbb4069d 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_sendto\n"));
screamer 0:7a64fbb4069d 211
screamer 0:7a64fbb4069d 212 /* not enough space to add an IP header to first pbuf in given p chain? */
screamer 0:7a64fbb4069d 213 if (pbuf_header(p, IP_HLEN)) {
screamer 0:7a64fbb4069d 214 /* allocate header in new pbuf */
screamer 0:7a64fbb4069d 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
screamer 0:7a64fbb4069d 216 /* new header pbuf could not be allocated? */
screamer 0:7a64fbb4069d 217 if (q == NULL) {
screamer 0:7a64fbb4069d 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 2, ("raw_sendto: could not allocate header\n"));
screamer 0:7a64fbb4069d 219 return ERR_MEM;
screamer 0:7a64fbb4069d 220 }
screamer 0:7a64fbb4069d 221 /* chain header q in front of given pbuf p */
screamer 0:7a64fbb4069d 222 pbuf_chain(q, p);
screamer 0:7a64fbb4069d 223 /* { first pbuf q points to header pbuf } */
screamer 0:7a64fbb4069d 224 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
screamer 0:7a64fbb4069d 225 } else {
screamer 0:7a64fbb4069d 226 /* first pbuf q equals given pbuf */
screamer 0:7a64fbb4069d 227 q = p;
screamer 0:7a64fbb4069d 228 if(pbuf_header(q, -IP_HLEN)) {
screamer 0:7a64fbb4069d 229 LWIP_ASSERT("Can't restore header we just removed!", 0);
screamer 0:7a64fbb4069d 230 return ERR_MEM;
screamer 0:7a64fbb4069d 231 }
screamer 0:7a64fbb4069d 232 }
screamer 0:7a64fbb4069d 233
screamer 0:7a64fbb4069d 234 if ((netif = ip_route(ipaddr)) == NULL) {
screamer 0:7a64fbb4069d 235 LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: No route to 0x%"X32_F"\n", ipaddr->addr));
screamer 0:7a64fbb4069d 236 /* free any temporary header pbuf allocated by pbuf_header() */
screamer 0:7a64fbb4069d 237 if (q != p) {
screamer 0:7a64fbb4069d 238 pbuf_free(q);
screamer 0:7a64fbb4069d 239 }
screamer 0:7a64fbb4069d 240 return ERR_RTE;
screamer 0:7a64fbb4069d 241 }
screamer 0:7a64fbb4069d 242
screamer 0:7a64fbb4069d 243 if (ip_addr_isany(&pcb->local_ip)) {
screamer 0:7a64fbb4069d 244 /* use outgoing network interface IP address as source address */
screamer 0:7a64fbb4069d 245 src_ip = &(netif->ip_addr);
screamer 0:7a64fbb4069d 246 } else {
screamer 0:7a64fbb4069d 247 /* use RAW PCB local IP address as source address */
screamer 0:7a64fbb4069d 248 src_ip = &(pcb->local_ip);
screamer 0:7a64fbb4069d 249 }
screamer 0:7a64fbb4069d 250
screamer 0:7a64fbb4069d 251 #if LWIP_NETIF_HWADDRHINT
screamer 0:7a64fbb4069d 252 netif->addr_hint = &(pcb->addr_hint);
screamer 0:7a64fbb4069d 253 #endif /* LWIP_NETIF_HWADDRHINT*/
screamer 0:7a64fbb4069d 254 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
screamer 0:7a64fbb4069d 255 #if LWIP_NETIF_HWADDRHINT
screamer 0:7a64fbb4069d 256 netif->addr_hint = NULL;
screamer 0:7a64fbb4069d 257 #endif /* LWIP_NETIF_HWADDRHINT*/
screamer 0:7a64fbb4069d 258
screamer 0:7a64fbb4069d 259 /* did we chain a header earlier? */
screamer 0:7a64fbb4069d 260 if (q != p) {
screamer 0:7a64fbb4069d 261 /* free the header */
screamer 0:7a64fbb4069d 262 pbuf_free(q);
screamer 0:7a64fbb4069d 263 }
screamer 0:7a64fbb4069d 264 return err;
screamer 0:7a64fbb4069d 265 }
screamer 0:7a64fbb4069d 266
screamer 0:7a64fbb4069d 267 /**
screamer 0:7a64fbb4069d 268 * Send the raw IP packet to the address given by raw_connect()
screamer 0:7a64fbb4069d 269 *
screamer 0:7a64fbb4069d 270 * @param pcb the raw pcb which to send
screamer 0:7a64fbb4069d 271 * @param p the IP payload to send
screamer 0:7a64fbb4069d 272 *
screamer 0:7a64fbb4069d 273 */
screamer 0:7a64fbb4069d 274 err_t
screamer 0:7a64fbb4069d 275 raw_send(struct raw_pcb *pcb, struct pbuf *p)
screamer 0:7a64fbb4069d 276 {
screamer 0:7a64fbb4069d 277 return raw_sendto(pcb, p, &pcb->remote_ip);
screamer 0:7a64fbb4069d 278 }
screamer 0:7a64fbb4069d 279
screamer 0:7a64fbb4069d 280 /**
screamer 0:7a64fbb4069d 281 * Remove an RAW PCB.
screamer 0:7a64fbb4069d 282 *
screamer 0:7a64fbb4069d 283 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
screamer 0:7a64fbb4069d 284 * RAW PCB's and the data structure is freed from memory.
screamer 0:7a64fbb4069d 285 *
screamer 0:7a64fbb4069d 286 * @see raw_new()
screamer 0:7a64fbb4069d 287 */
screamer 0:7a64fbb4069d 288 void
screamer 0:7a64fbb4069d 289 raw_remove(struct raw_pcb *pcb)
screamer 0:7a64fbb4069d 290 {
screamer 0:7a64fbb4069d 291 struct raw_pcb *pcb2;
screamer 0:7a64fbb4069d 292 /* pcb to be removed is first in list? */
screamer 0:7a64fbb4069d 293 if (raw_pcbs == pcb) {
screamer 0:7a64fbb4069d 294 /* make list start at 2nd pcb */
screamer 0:7a64fbb4069d 295 raw_pcbs = raw_pcbs->next;
screamer 0:7a64fbb4069d 296 /* pcb not 1st in list */
screamer 0:7a64fbb4069d 297 } else {
screamer 0:7a64fbb4069d 298 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
screamer 0:7a64fbb4069d 299 /* find pcb in raw_pcbs list */
screamer 0:7a64fbb4069d 300 if (pcb2->next != NULL && pcb2->next == pcb) {
screamer 0:7a64fbb4069d 301 /* remove pcb from list */
screamer 0:7a64fbb4069d 302 pcb2->next = pcb->next;
screamer 0:7a64fbb4069d 303 }
screamer 0:7a64fbb4069d 304 }
screamer 0:7a64fbb4069d 305 }
screamer 0:7a64fbb4069d 306 memp_free(MEMP_RAW_PCB, pcb);
screamer 0:7a64fbb4069d 307 }
screamer 0:7a64fbb4069d 308
screamer 0:7a64fbb4069d 309 /**
screamer 0:7a64fbb4069d 310 * Create a RAW PCB.
screamer 0:7a64fbb4069d 311 *
screamer 0:7a64fbb4069d 312 * @return The RAW PCB which was created. NULL if the PCB data structure
screamer 0:7a64fbb4069d 313 * could not be allocated.
screamer 0:7a64fbb4069d 314 *
screamer 0:7a64fbb4069d 315 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
screamer 0:7a64fbb4069d 316 *
screamer 0:7a64fbb4069d 317 * @see raw_remove()
screamer 0:7a64fbb4069d 318 */
screamer 0:7a64fbb4069d 319 struct raw_pcb *
screamer 0:7a64fbb4069d 320 raw_new(u8_t proto) {
screamer 0:7a64fbb4069d 321 struct raw_pcb *pcb;
screamer 0:7a64fbb4069d 322
screamer 0:7a64fbb4069d 323 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_new\n"));
screamer 0:7a64fbb4069d 324
screamer 0:7a64fbb4069d 325 pcb = (struct raw_pcb *)(memp_malloc(MEMP_RAW_PCB)); // static_cast<struct raw_pcb *>(x)
screamer 0:7a64fbb4069d 326 /* could allocate RAW PCB? */
screamer 0:7a64fbb4069d 327 if (pcb != NULL) {
screamer 0:7a64fbb4069d 328 /* initialize PCB to all zeroes */
screamer 0:7a64fbb4069d 329 memset(pcb, 0, sizeof(struct raw_pcb));
screamer 0:7a64fbb4069d 330 pcb->protocol = proto;
screamer 0:7a64fbb4069d 331 pcb->ttl = RAW_TTL;
screamer 0:7a64fbb4069d 332 pcb->next = raw_pcbs;
screamer 0:7a64fbb4069d 333 raw_pcbs = pcb;
screamer 0:7a64fbb4069d 334 }
screamer 0:7a64fbb4069d 335 return pcb;
screamer 0:7a64fbb4069d 336 }
screamer 0:7a64fbb4069d 337
screamer 0:7a64fbb4069d 338 #endif /* LWIP_RAW */