VZTECH / lwip

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Fork of lwip by mbed official

core/raw.c@29:da6f39d13880, 2015-01-08 (annotated)

Committer:
klauss
Date:
Thu Jan 08 23:42:30 2015 +0000
Revision:
29:da6f39d13880
Parent:
0:51ac1d130fd4 
wip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /**
mbed_official 0:51ac1d130fd4 2 * @file
mbed_official 0:51ac1d130fd4 3 * Implementation of raw protocol PCBs for low-level handling of
mbed_official 0:51ac1d130fd4 4 * different types of protocols besides (or overriding) those
mbed_official 0:51ac1d130fd4 5 * already available in lwIP.
mbed_official 0:51ac1d130fd4 6 *
mbed_official 0:51ac1d130fd4 7 */
mbed_official 0:51ac1d130fd4 8
mbed_official 0:51ac1d130fd4 9 /*
mbed_official 0:51ac1d130fd4 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 11 * All rights reserved.
mbed_official 0:51ac1d130fd4 12 *
mbed_official 0:51ac1d130fd4 13 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 14 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 15 *
mbed_official 0:51ac1d130fd4 16 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 17 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 20 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 21 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 22 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 23 *
mbed_official 0:51ac1d130fd4 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 33 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 34 *
mbed_official 0:51ac1d130fd4 35 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 36 *
mbed_official 0:51ac1d130fd4 37 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 38 *
mbed_official 0:51ac1d130fd4 39 */
mbed_official 0:51ac1d130fd4 40
mbed_official 0:51ac1d130fd4 41 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 42
mbed_official 0:51ac1d130fd4 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
mbed_official 0:51ac1d130fd4 44
mbed_official 0:51ac1d130fd4 45 #include "lwip/def.h"
mbed_official 0:51ac1d130fd4 46 #include "lwip/memp.h"
mbed_official 0:51ac1d130fd4 47 #include "lwip/ip_addr.h"
mbed_official 0:51ac1d130fd4 48 #include "lwip/netif.h"
mbed_official 0:51ac1d130fd4 49 #include "lwip/raw.h"
mbed_official 0:51ac1d130fd4 50 #include "lwip/stats.h"
mbed_official 0:51ac1d130fd4 51 #include "arch/perf.h"
mbed_official 0:51ac1d130fd4 52
mbed_official 0:51ac1d130fd4 53 #include <string.h>
mbed_official 0:51ac1d130fd4 54
mbed_official 0:51ac1d130fd4 55 /** The list of RAW PCBs */
mbed_official 0:51ac1d130fd4 56 static struct raw_pcb *raw_pcbs;
mbed_official 0:51ac1d130fd4 57
mbed_official 0:51ac1d130fd4 58 /**
mbed_official 0:51ac1d130fd4 59 * Determine if in incoming IP packet is covered by a RAW PCB
mbed_official 0:51ac1d130fd4 60 * and if so, pass it to a user-provided receive callback function.
mbed_official 0:51ac1d130fd4 61 *
mbed_official 0:51ac1d130fd4 62 * Given an incoming IP datagram (as a chain of pbufs) this function
mbed_official 0:51ac1d130fd4 63 * finds a corresponding RAW PCB and calls the corresponding receive
mbed_official 0:51ac1d130fd4 64 * callback function.
mbed_official 0:51ac1d130fd4 65 *
mbed_official 0:51ac1d130fd4 66 * @param p pbuf to be demultiplexed to a RAW PCB.
mbed_official 0:51ac1d130fd4 67 * @param inp network interface on which the datagram was received.
mbed_official 0:51ac1d130fd4 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
mbed_official 0:51ac1d130fd4 69 * callback function. The caller MAY NOT not reference the
mbed_official 0:51ac1d130fd4 70 * packet any longer, and MAY NOT call pbuf_free().
mbed_official 0:51ac1d130fd4 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
mbed_official 0:51ac1d130fd4 72 * caller).
mbed_official 0:51ac1d130fd4 73 *
mbed_official 0:51ac1d130fd4 74 */
mbed_official 0:51ac1d130fd4 75 u8_t
mbed_official 0:51ac1d130fd4 76 raw_input(struct pbuf *p, struct netif *inp)
mbed_official 0:51ac1d130fd4 77 {
mbed_official 0:51ac1d130fd4 78 struct raw_pcb *pcb, *prev;
mbed_official 0:51ac1d130fd4 79 struct ip_hdr *iphdr;
mbed_official 0:51ac1d130fd4 80 s16_t proto;
mbed_official 0:51ac1d130fd4 81 u8_t eaten = 0;
mbed_official 0:51ac1d130fd4 82
mbed_official 0:51ac1d130fd4 83 LWIP_UNUSED_ARG(inp);
mbed_official 0:51ac1d130fd4 84
mbed_official 0:51ac1d130fd4 85 iphdr = (struct ip_hdr *)p->payload;
mbed_official 0:51ac1d130fd4 86 proto = IPH_PROTO(iphdr);
mbed_official 0:51ac1d130fd4 87
mbed_official 0:51ac1d130fd4 88 prev = NULL;
mbed_official 0:51ac1d130fd4 89 pcb = raw_pcbs;
mbed_official 0:51ac1d130fd4 90 /* loop through all raw pcbs until the packet is eaten by one */
mbed_official 0:51ac1d130fd4 91 /* this allows multiple pcbs to match against the packet by design */
mbed_official 0:51ac1d130fd4 92 while ((eaten == 0) && (pcb != NULL)) {
mbed_official 0:51ac1d130fd4 93 if ((pcb->protocol == proto) &&
mbed_official 0:51ac1d130fd4 94 (ip_addr_isany(&pcb->local_ip) ||
mbed_official 0:51ac1d130fd4 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
mbed_official 0:51ac1d130fd4 96 #if IP_SOF_BROADCAST_RECV
mbed_official 0:51ac1d130fd4 97 /* broadcast filter? */
mbed_official 0:51ac1d130fd4 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
mbed_official 0:51ac1d130fd4 99 #endif /* IP_SOF_BROADCAST_RECV */
mbed_official 0:51ac1d130fd4 100 {
mbed_official 0:51ac1d130fd4 101 /* receive callback function available? */
mbed_official 0:51ac1d130fd4 102 if (pcb->recv != NULL) {
mbed_official 0:51ac1d130fd4 103 /* the receive callback function did not eat the packet? */
mbed_official 0:51ac1d130fd4 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
mbed_official 0:51ac1d130fd4 105 /* receive function ate the packet */
mbed_official 0:51ac1d130fd4 106 p = NULL;
mbed_official 0:51ac1d130fd4 107 eaten = 1;
mbed_official 0:51ac1d130fd4 108 if (prev != NULL) {
mbed_official 0:51ac1d130fd4 109 /* move the pcb to the front of raw_pcbs so that is
mbed_official 0:51ac1d130fd4 110 found faster next time */
mbed_official 0:51ac1d130fd4 111 prev->next = pcb->next;
mbed_official 0:51ac1d130fd4 112 pcb->next = raw_pcbs;
mbed_official 0:51ac1d130fd4 113 raw_pcbs = pcb;
mbed_official 0:51ac1d130fd4 114 }
mbed_official 0:51ac1d130fd4 115 }
mbed_official 0:51ac1d130fd4 116 }
mbed_official 0:51ac1d130fd4 117 /* no receive callback function was set for this raw PCB */
mbed_official 0:51ac1d130fd4 118 }
mbed_official 0:51ac1d130fd4 119 /* drop the packet */
mbed_official 0:51ac1d130fd4 120 }
mbed_official 0:51ac1d130fd4 121 prev = pcb;
mbed_official 0:51ac1d130fd4 122 pcb = pcb->next;
mbed_official 0:51ac1d130fd4 123 }
mbed_official 0:51ac1d130fd4 124 return eaten;
mbed_official 0:51ac1d130fd4 125 }
mbed_official 0:51ac1d130fd4 126
mbed_official 0:51ac1d130fd4 127 /**
mbed_official 0:51ac1d130fd4 128 * Bind a RAW PCB.
mbed_official 0:51ac1d130fd4 129 *
mbed_official 0:51ac1d130fd4 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
mbed_official 0:51ac1d130fd4 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
mbed_official 0:51ac1d130fd4 132 * bind to all local interfaces.
mbed_official 0:51ac1d130fd4 133 *
mbed_official 0:51ac1d130fd4 134 * @return lwIP error code.
mbed_official 0:51ac1d130fd4 135 * - ERR_OK. Successful. No error occured.
mbed_official 0:51ac1d130fd4 136 * - ERR_USE. The specified IP address is already bound to by
mbed_official 0:51ac1d130fd4 137 * another RAW PCB.
mbed_official 0:51ac1d130fd4 138 *
mbed_official 0:51ac1d130fd4 139 * @see raw_disconnect()
mbed_official 0:51ac1d130fd4 140 */
mbed_official 0:51ac1d130fd4 141 err_t
mbed_official 0:51ac1d130fd4 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
mbed_official 0:51ac1d130fd4 143 {
mbed_official 0:51ac1d130fd4 144 ip_addr_set(&pcb->local_ip, ipaddr);
mbed_official 0:51ac1d130fd4 145 return ERR_OK;
mbed_official 0:51ac1d130fd4 146 }
mbed_official 0:51ac1d130fd4 147
mbed_official 0:51ac1d130fd4 148 /**
mbed_official 0:51ac1d130fd4 149 * Connect an RAW PCB. This function is required by upper layers
mbed_official 0:51ac1d130fd4 150 * of lwip. Using the raw api you could use raw_sendto() instead
mbed_official 0:51ac1d130fd4 151 *
mbed_official 0:51ac1d130fd4 152 * This will associate the RAW PCB with the remote address.
mbed_official 0:51ac1d130fd4 153 *
mbed_official 0:51ac1d130fd4 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
mbed_official 0:51ac1d130fd4 155 * @param ipaddr remote IP address to connect with.
mbed_official 0:51ac1d130fd4 156 *
mbed_official 0:51ac1d130fd4 157 * @return lwIP error code
mbed_official 0:51ac1d130fd4 158 *
mbed_official 0:51ac1d130fd4 159 * @see raw_disconnect() and raw_sendto()
mbed_official 0:51ac1d130fd4 160 */
mbed_official 0:51ac1d130fd4 161 err_t
mbed_official 0:51ac1d130fd4 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
mbed_official 0:51ac1d130fd4 163 {
mbed_official 0:51ac1d130fd4 164 ip_addr_set(&pcb->remote_ip, ipaddr);
mbed_official 0:51ac1d130fd4 165 return ERR_OK;
mbed_official 0:51ac1d130fd4 166 }
mbed_official 0:51ac1d130fd4 167
mbed_official 0:51ac1d130fd4 168
mbed_official 0:51ac1d130fd4 169 /**
mbed_official 0:51ac1d130fd4 170 * Set the callback function for received packets that match the
mbed_official 0:51ac1d130fd4 171 * raw PCB's protocol and binding.
mbed_official 0:51ac1d130fd4 172 *
mbed_official 0:51ac1d130fd4 173 * The callback function MUST either
mbed_official 0:51ac1d130fd4 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
mbed_official 0:51ac1d130fd4 175 * packet will not be passed to other raw PCBs or other protocol layers.
mbed_official 0:51ac1d130fd4 176 * - not free the packet, and return zero. The packet will be matched
mbed_official 0:51ac1d130fd4 177 * against further PCBs and/or forwarded to another protocol layers.
mbed_official 0:51ac1d130fd4 178 *
mbed_official 0:51ac1d130fd4 179 * @return non-zero if the packet was free()d, zero if the packet remains
mbed_official 0:51ac1d130fd4 180 * available for others.
mbed_official 0:51ac1d130fd4 181 */
mbed_official 0:51ac1d130fd4 182 void
mbed_official 0:51ac1d130fd4 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
mbed_official 0:51ac1d130fd4 184 {
mbed_official 0:51ac1d130fd4 185 /* remember recv() callback and user data */
mbed_official 0:51ac1d130fd4 186 pcb->recv = recv;
mbed_official 0:51ac1d130fd4 187 pcb->recv_arg = recv_arg;
mbed_official 0:51ac1d130fd4 188 }
mbed_official 0:51ac1d130fd4 189
mbed_official 0:51ac1d130fd4 190 /**
mbed_official 0:51ac1d130fd4 191 * Send the raw IP packet to the given address. Note that actually you cannot
mbed_official 0:51ac1d130fd4 192 * modify the IP headers (this is inconsistent with the receive callback where
mbed_official 0:51ac1d130fd4 193 * you actually get the IP headers), you can only specify the IP payload here.
mbed_official 0:51ac1d130fd4 194 * It requires some more changes in lwIP. (there will be a raw_send() function
mbed_official 0:51ac1d130fd4 195 * then.)
mbed_official 0:51ac1d130fd4 196 *
mbed_official 0:51ac1d130fd4 197 * @param pcb the raw pcb which to send
mbed_official 0:51ac1d130fd4 198 * @param p the IP payload to send
mbed_official 0:51ac1d130fd4 199 * @param ipaddr the destination address of the IP packet
mbed_official 0:51ac1d130fd4 200 *
mbed_official 0:51ac1d130fd4 201 */
mbed_official 0:51ac1d130fd4 202 err_t
mbed_official 0:51ac1d130fd4 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
mbed_official 0:51ac1d130fd4 204 {
mbed_official 0:51ac1d130fd4 205 err_t err;
mbed_official 0:51ac1d130fd4 206 struct netif *netif;
mbed_official 0:51ac1d130fd4 207 ip_addr_t *src_ip;
mbed_official 0:51ac1d130fd4 208 struct pbuf *q; /* q will be sent down the stack */
mbed_official 0:51ac1d130fd4 209
mbed_official 0:51ac1d130fd4 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
mbed_official 0:51ac1d130fd4 211
mbed_official 0:51ac1d130fd4 212 /* not enough space to add an IP header to first pbuf in given p chain? */
mbed_official 0:51ac1d130fd4 213 if (pbuf_header(p, IP_HLEN)) {
mbed_official 0:51ac1d130fd4 214 /* allocate header in new pbuf */
mbed_official 0:51ac1d130fd4 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
mbed_official 0:51ac1d130fd4 216 /* new header pbuf could not be allocated? */
mbed_official 0:51ac1d130fd4 217 if (q == NULL) {
mbed_official 0:51ac1d130fd4 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
mbed_official 0:51ac1d130fd4 219 return ERR_MEM;
mbed_official 0:51ac1d130fd4 220 }
mbed_official 0:51ac1d130fd4 221 if (p->tot_len != 0) {
mbed_official 0:51ac1d130fd4 222 /* chain header q in front of given pbuf p */
mbed_official 0:51ac1d130fd4 223 pbuf_chain(q, p);
mbed_official 0:51ac1d130fd4 224 }
mbed_official 0:51ac1d130fd4 225 /* { first pbuf q points to header pbuf } */
mbed_official 0:51ac1d130fd4 226 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
mbed_official 0:51ac1d130fd4 227 } else {
mbed_official 0:51ac1d130fd4 228 /* first pbuf q equals given pbuf */
mbed_official 0:51ac1d130fd4 229 q = p;
mbed_official 0:51ac1d130fd4 230 if(pbuf_header(q, -IP_HLEN)) {
mbed_official 0:51ac1d130fd4 231 LWIP_ASSERT("Can't restore header we just removed!", 0);
mbed_official 0:51ac1d130fd4 232 return ERR_MEM;
mbed_official 0:51ac1d130fd4 233 }
mbed_official 0:51ac1d130fd4 234 }
mbed_official 0:51ac1d130fd4 235
mbed_official 0:51ac1d130fd4 236 if ((netif = ip_route(ipaddr)) == NULL) {
mbed_official 0:51ac1d130fd4 237 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
mbed_official 0:51ac1d130fd4 238 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
mbed_official 0:51ac1d130fd4 239 /* free any temporary header pbuf allocated by pbuf_header() */
mbed_official 0:51ac1d130fd4 240 if (q != p) {
mbed_official 0:51ac1d130fd4 241 pbuf_free(q);
mbed_official 0:51ac1d130fd4 242 }
mbed_official 0:51ac1d130fd4 243 return ERR_RTE;
mbed_official 0:51ac1d130fd4 244 }
mbed_official 0:51ac1d130fd4 245
mbed_official 0:51ac1d130fd4 246 #if IP_SOF_BROADCAST
mbed_official 0:51ac1d130fd4 247 /* broadcast filter? */
mbed_official 0:51ac1d130fd4 248 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
mbed_official 0:51ac1d130fd4 249 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
mbed_official 0:51ac1d130fd4 250 /* free any temporary header pbuf allocated by pbuf_header() */
mbed_official 0:51ac1d130fd4 251 if (q != p) {
mbed_official 0:51ac1d130fd4 252 pbuf_free(q);
mbed_official 0:51ac1d130fd4 253 }
mbed_official 0:51ac1d130fd4 254 return ERR_VAL;
mbed_official 0:51ac1d130fd4 255 }
mbed_official 0:51ac1d130fd4 256 #endif /* IP_SOF_BROADCAST */
mbed_official 0:51ac1d130fd4 257
mbed_official 0:51ac1d130fd4 258 if (ip_addr_isany(&pcb->local_ip)) {
mbed_official 0:51ac1d130fd4 259 /* use outgoing network interface IP address as source address */
mbed_official 0:51ac1d130fd4 260 src_ip = &(netif->ip_addr);
mbed_official 0:51ac1d130fd4 261 } else {
mbed_official 0:51ac1d130fd4 262 /* use RAW PCB local IP address as source address */
mbed_official 0:51ac1d130fd4 263 src_ip = &(pcb->local_ip);
mbed_official 0:51ac1d130fd4 264 }
mbed_official 0:51ac1d130fd4 265
mbed_official 0:51ac1d130fd4 266 #if LWIP_NETIF_HWADDRHINT
mbed_official 0:51ac1d130fd4 267 netif->addr_hint = &(pcb->addr_hint);
mbed_official 0:51ac1d130fd4 268 #endif /* LWIP_NETIF_HWADDRHINT*/
mbed_official 0:51ac1d130fd4 269 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
mbed_official 0:51ac1d130fd4 270 #if LWIP_NETIF_HWADDRHINT
mbed_official 0:51ac1d130fd4 271 netif->addr_hint = NULL;
mbed_official 0:51ac1d130fd4 272 #endif /* LWIP_NETIF_HWADDRHINT*/
mbed_official 0:51ac1d130fd4 273
mbed_official 0:51ac1d130fd4 274 /* did we chain a header earlier? */
mbed_official 0:51ac1d130fd4 275 if (q != p) {
mbed_official 0:51ac1d130fd4 276 /* free the header */
mbed_official 0:51ac1d130fd4 277 pbuf_free(q);
mbed_official 0:51ac1d130fd4 278 }
mbed_official 0:51ac1d130fd4 279 return err;
mbed_official 0:51ac1d130fd4 280 }
mbed_official 0:51ac1d130fd4 281
mbed_official 0:51ac1d130fd4 282 /**
mbed_official 0:51ac1d130fd4 283 * Send the raw IP packet to the address given by raw_connect()
mbed_official 0:51ac1d130fd4 284 *
mbed_official 0:51ac1d130fd4 285 * @param pcb the raw pcb which to send
mbed_official 0:51ac1d130fd4 286 * @param p the IP payload to send
mbed_official 0:51ac1d130fd4 287 *
mbed_official 0:51ac1d130fd4 288 */
mbed_official 0:51ac1d130fd4 289 err_t
mbed_official 0:51ac1d130fd4 290 raw_send(struct raw_pcb *pcb, struct pbuf *p)
mbed_official 0:51ac1d130fd4 291 {
mbed_official 0:51ac1d130fd4 292 return raw_sendto(pcb, p, &pcb->remote_ip);
mbed_official 0:51ac1d130fd4 293 }
mbed_official 0:51ac1d130fd4 294
mbed_official 0:51ac1d130fd4 295 /**
mbed_official 0:51ac1d130fd4 296 * Remove an RAW PCB.
mbed_official 0:51ac1d130fd4 297 *
mbed_official 0:51ac1d130fd4 298 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
mbed_official 0:51ac1d130fd4 299 * RAW PCB's and the data structure is freed from memory.
mbed_official 0:51ac1d130fd4 300 *
mbed_official 0:51ac1d130fd4 301 * @see raw_new()
mbed_official 0:51ac1d130fd4 302 */
mbed_official 0:51ac1d130fd4 303 void
mbed_official 0:51ac1d130fd4 304 raw_remove(struct raw_pcb *pcb)
mbed_official 0:51ac1d130fd4 305 {
mbed_official 0:51ac1d130fd4 306 struct raw_pcb *pcb2;
mbed_official 0:51ac1d130fd4 307 /* pcb to be removed is first in list? */
mbed_official 0:51ac1d130fd4 308 if (raw_pcbs == pcb) {
mbed_official 0:51ac1d130fd4 309 /* make list start at 2nd pcb */
mbed_official 0:51ac1d130fd4 310 raw_pcbs = raw_pcbs->next;
mbed_official 0:51ac1d130fd4 311 /* pcb not 1st in list */
mbed_official 0:51ac1d130fd4 312 } else {
mbed_official 0:51ac1d130fd4 313 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
mbed_official 0:51ac1d130fd4 314 /* find pcb in raw_pcbs list */
mbed_official 0:51ac1d130fd4 315 if (pcb2->next != NULL && pcb2->next == pcb) {
mbed_official 0:51ac1d130fd4 316 /* remove pcb from list */
mbed_official 0:51ac1d130fd4 317 pcb2->next = pcb->next;
mbed_official 0:51ac1d130fd4 318 }
mbed_official 0:51ac1d130fd4 319 }
mbed_official 0:51ac1d130fd4 320 }
mbed_official 0:51ac1d130fd4 321 memp_free(MEMP_RAW_PCB, pcb);
mbed_official 0:51ac1d130fd4 322 }
mbed_official 0:51ac1d130fd4 323
mbed_official 0:51ac1d130fd4 324 /**
mbed_official 0:51ac1d130fd4 325 * Create a RAW PCB.
mbed_official 0:51ac1d130fd4 326 *
mbed_official 0:51ac1d130fd4 327 * @return The RAW PCB which was created. NULL if the PCB data structure
mbed_official 0:51ac1d130fd4 328 * could not be allocated.
mbed_official 0:51ac1d130fd4 329 *
mbed_official 0:51ac1d130fd4 330 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
mbed_official 0:51ac1d130fd4 331 *
mbed_official 0:51ac1d130fd4 332 * @see raw_remove()
mbed_official 0:51ac1d130fd4 333 */
mbed_official 0:51ac1d130fd4 334 struct raw_pcb *
mbed_official 0:51ac1d130fd4 335 raw_new(u8_t proto)
mbed_official 0:51ac1d130fd4 336 {
mbed_official 0:51ac1d130fd4 337 struct raw_pcb *pcb;
mbed_official 0:51ac1d130fd4 338
mbed_official 0:51ac1d130fd4 339 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
mbed_official 0:51ac1d130fd4 340
mbed_official 0:51ac1d130fd4 341 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
mbed_official 0:51ac1d130fd4 342 /* could allocate RAW PCB? */
mbed_official 0:51ac1d130fd4 343 if (pcb != NULL) {
mbed_official 0:51ac1d130fd4 344 /* initialize PCB to all zeroes */
mbed_official 0:51ac1d130fd4 345 memset(pcb, 0, sizeof(struct raw_pcb));
mbed_official 0:51ac1d130fd4 346 pcb->protocol = proto;
mbed_official 0:51ac1d130fd4 347 pcb->ttl = RAW_TTL;
mbed_official 0:51ac1d130fd4 348 pcb->next = raw_pcbs;
mbed_official 0:51ac1d130fd4 349 raw_pcbs = pcb;
mbed_official 0:51ac1d130fd4 350 }
mbed_official 0:51ac1d130fd4 351 return pcb;
mbed_official 0:51ac1d130fd4 352 }
mbed_official 0:51ac1d130fd4 353
mbed_official 0:51ac1d130fd4 354 #endif /* LWIP_RAW */