Michael Spencer / Mbed 2 deprecated LaOS

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Dependencies:   mbed

NetServices/lwip/core/raw.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /**
Michael J. Spencer 1:f5ac63519541 2 * @file
Michael J. Spencer 1:f5ac63519541 3 * Implementation of raw protocol PCBs for low-level handling of
Michael J. Spencer 1:f5ac63519541 4 * different types of protocols besides (or overriding) those
Michael J. Spencer 1:f5ac63519541 5 * already available in lwIP.
Michael J. Spencer 1:f5ac63519541 6 *
Michael J. Spencer 1:f5ac63519541 7 */
Michael J. Spencer 1:f5ac63519541 8
Michael J. Spencer 1:f5ac63519541 9 /*
Michael J. Spencer 1:f5ac63519541 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
Michael J. Spencer 1:f5ac63519541 11 * All rights reserved.
Michael J. Spencer 1:f5ac63519541 12 *
Michael J. Spencer 1:f5ac63519541 13 * Redistribution and use in source and binary forms, with or without modification,
Michael J. Spencer 1:f5ac63519541 14 * are permitted provided that the following conditions are met:
Michael J. Spencer 1:f5ac63519541 15 *
Michael J. Spencer 1:f5ac63519541 16 * 1. Redistributions of source code must retain the above copyright notice,
Michael J. Spencer 1:f5ac63519541 17 * this list of conditions and the following disclaimer.
Michael J. Spencer 1:f5ac63519541 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
Michael J. Spencer 1:f5ac63519541 19 * this list of conditions and the following disclaimer in the documentation
Michael J. Spencer 1:f5ac63519541 20 * and/or other materials provided with the distribution.
Michael J. Spencer 1:f5ac63519541 21 * 3. The name of the author may not be used to endorse or promote products
Michael J. Spencer 1:f5ac63519541 22 * derived from this software without specific prior written permission.
Michael J. Spencer 1:f5ac63519541 23 *
Michael J. Spencer 1:f5ac63519541 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
Michael J. Spencer 1:f5ac63519541 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
Michael J. Spencer 1:f5ac63519541 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
Michael J. Spencer 1:f5ac63519541 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Michael J. Spencer 1:f5ac63519541 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
Michael J. Spencer 1:f5ac63519541 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Michael J. Spencer 1:f5ac63519541 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Michael J. Spencer 1:f5ac63519541 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
Michael J. Spencer 1:f5ac63519541 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
Michael J. Spencer 1:f5ac63519541 33 * OF SUCH DAMAGE.
Michael J. Spencer 1:f5ac63519541 34 *
Michael J. Spencer 1:f5ac63519541 35 * This file is part of the lwIP TCP/IP stack.
Michael J. Spencer 1:f5ac63519541 36 *
Michael J. Spencer 1:f5ac63519541 37 * Author: Adam Dunkels <adam@sics.se>
Michael J. Spencer 1:f5ac63519541 38 *
Michael J. Spencer 1:f5ac63519541 39 */
Michael J. Spencer 1:f5ac63519541 40
Michael J. Spencer 1:f5ac63519541 41 #include "lwip/opt.h"
Michael J. Spencer 1:f5ac63519541 42
Michael J. Spencer 1:f5ac63519541 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
Michael J. Spencer 1:f5ac63519541 44
Michael J. Spencer 1:f5ac63519541 45 #include "lwip/def.h"
Michael J. Spencer 1:f5ac63519541 46 #include "lwip/memp.h"
Michael J. Spencer 1:f5ac63519541 47 #include "lwip/ip_addr.h"
Michael J. Spencer 1:f5ac63519541 48 #include "lwip/netif.h"
Michael J. Spencer 1:f5ac63519541 49 #include "lwip/raw.h"
Michael J. Spencer 1:f5ac63519541 50 #include "lwip/stats.h"
Michael J. Spencer 1:f5ac63519541 51 #include "arch/perf.h"
Michael J. Spencer 1:f5ac63519541 52
Michael J. Spencer 1:f5ac63519541 53 #include <string.h>
Michael J. Spencer 1:f5ac63519541 54
Michael J. Spencer 1:f5ac63519541 55 /** The list of RAW PCBs */
Michael J. Spencer 1:f5ac63519541 56 static struct raw_pcb *raw_pcbs;
Michael J. Spencer 1:f5ac63519541 57
Michael J. Spencer 1:f5ac63519541 58 /**
Michael J. Spencer 1:f5ac63519541 59 * Determine if in incoming IP packet is covered by a RAW PCB
Michael J. Spencer 1:f5ac63519541 60 * and if so, pass it to a user-provided receive callback function.
Michael J. Spencer 1:f5ac63519541 61 *
Michael J. Spencer 1:f5ac63519541 62 * Given an incoming IP datagram (as a chain of pbufs) this function
Michael J. Spencer 1:f5ac63519541 63 * finds a corresponding RAW PCB and calls the corresponding receive
Michael J. Spencer 1:f5ac63519541 64 * callback function.
Michael J. Spencer 1:f5ac63519541 65 *
Michael J. Spencer 1:f5ac63519541 66 * @param p pbuf to be demultiplexed to a RAW PCB.
Michael J. Spencer 1:f5ac63519541 67 * @param inp network interface on which the datagram was received.
Michael J. Spencer 1:f5ac63519541 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
Michael J. Spencer 1:f5ac63519541 69 * callback function. The caller MAY NOT not reference the
Michael J. Spencer 1:f5ac63519541 70 * packet any longer, and MAY NOT call pbuf_free().
Michael J. Spencer 1:f5ac63519541 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
Michael J. Spencer 1:f5ac63519541 72 * caller).
Michael J. Spencer 1:f5ac63519541 73 *
Michael J. Spencer 1:f5ac63519541 74 */
Michael J. Spencer 1:f5ac63519541 75 u8_t
Michael J. Spencer 1:f5ac63519541 76 raw_input(struct pbuf *p, struct netif *inp)
Michael J. Spencer 1:f5ac63519541 77 {
Michael J. Spencer 1:f5ac63519541 78 struct raw_pcb *pcb, *prev;
Michael J. Spencer 1:f5ac63519541 79 struct ip_hdr *iphdr;
Michael J. Spencer 1:f5ac63519541 80 s16_t proto;
Michael J. Spencer 1:f5ac63519541 81 u8_t eaten = 0;
Michael J. Spencer 1:f5ac63519541 82
Michael J. Spencer 1:f5ac63519541 83 LWIP_UNUSED_ARG(inp);
Michael J. Spencer 1:f5ac63519541 84
Michael J. Spencer 1:f5ac63519541 85 iphdr = (struct ip_hdr *)p->payload;
Michael J. Spencer 1:f5ac63519541 86 proto = IPH_PROTO(iphdr);
Michael J. Spencer 1:f5ac63519541 87
Michael J. Spencer 1:f5ac63519541 88 prev = NULL;
Michael J. Spencer 1:f5ac63519541 89 pcb = raw_pcbs;
Michael J. Spencer 1:f5ac63519541 90 /* loop through all raw pcbs until the packet is eaten by one */
Michael J. Spencer 1:f5ac63519541 91 /* this allows multiple pcbs to match against the packet by design */
Michael J. Spencer 1:f5ac63519541 92 while ((eaten == 0) && (pcb != NULL)) {
Michael J. Spencer 1:f5ac63519541 93 if ((pcb->protocol == proto) &&
Michael J. Spencer 1:f5ac63519541 94 (ip_addr_isany(&pcb->local_ip) ||
Michael J. Spencer 1:f5ac63519541 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
Michael J. Spencer 1:f5ac63519541 96 #if IP_SOF_BROADCAST_RECV
Michael J. Spencer 1:f5ac63519541 97 /* broadcast filter? */
Michael J. Spencer 1:f5ac63519541 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
Michael J. Spencer 1:f5ac63519541 99 #endif /* IP_SOF_BROADCAST_RECV */
Michael J. Spencer 1:f5ac63519541 100 {
Michael J. Spencer 1:f5ac63519541 101 /* receive callback function available? */
Michael J. Spencer 1:f5ac63519541 102 if (pcb->recv != NULL) {
Michael J. Spencer 1:f5ac63519541 103 /* the receive callback function did not eat the packet? */
Michael J. Spencer 1:f5ac63519541 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
Michael J. Spencer 1:f5ac63519541 105 /* receive function ate the packet */
Michael J. Spencer 1:f5ac63519541 106 p = NULL;
Michael J. Spencer 1:f5ac63519541 107 eaten = 1;
Michael J. Spencer 1:f5ac63519541 108 if (prev != NULL) {
Michael J. Spencer 1:f5ac63519541 109 /* move the pcb to the front of raw_pcbs so that is
Michael J. Spencer 1:f5ac63519541 110 found faster next time */
Michael J. Spencer 1:f5ac63519541 111 prev->next = pcb->next;
Michael J. Spencer 1:f5ac63519541 112 pcb->next = raw_pcbs;
Michael J. Spencer 1:f5ac63519541 113 raw_pcbs = pcb;
Michael J. Spencer 1:f5ac63519541 114 }
Michael J. Spencer 1:f5ac63519541 115 }
Michael J. Spencer 1:f5ac63519541 116 }
Michael J. Spencer 1:f5ac63519541 117 /* no receive callback function was set for this raw PCB */
Michael J. Spencer 1:f5ac63519541 118 }
Michael J. Spencer 1:f5ac63519541 119 /* drop the packet */
Michael J. Spencer 1:f5ac63519541 120 }
Michael J. Spencer 1:f5ac63519541 121 prev = pcb;
Michael J. Spencer 1:f5ac63519541 122 pcb = pcb->next;
Michael J. Spencer 1:f5ac63519541 123 }
Michael J. Spencer 1:f5ac63519541 124 return eaten;
Michael J. Spencer 1:f5ac63519541 125 }
Michael J. Spencer 1:f5ac63519541 126
Michael J. Spencer 1:f5ac63519541 127 /**
Michael J. Spencer 1:f5ac63519541 128 * Bind a RAW PCB.
Michael J. Spencer 1:f5ac63519541 129 *
Michael J. Spencer 1:f5ac63519541 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
Michael J. Spencer 1:f5ac63519541 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
Michael J. Spencer 1:f5ac63519541 132 * bind to all local interfaces.
Michael J. Spencer 1:f5ac63519541 133 *
Michael J. Spencer 1:f5ac63519541 134 * @return lwIP error code.
Michael J. Spencer 1:f5ac63519541 135 * - ERR_OK. Successful. No error occured.
Michael J. Spencer 1:f5ac63519541 136 * - ERR_USE. The specified IP address is already bound to by
Michael J. Spencer 1:f5ac63519541 137 * another RAW PCB.
Michael J. Spencer 1:f5ac63519541 138 *
Michael J. Spencer 1:f5ac63519541 139 * @see raw_disconnect()
Michael J. Spencer 1:f5ac63519541 140 */
Michael J. Spencer 1:f5ac63519541 141 err_t
Michael J. Spencer 1:f5ac63519541 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
Michael J. Spencer 1:f5ac63519541 143 {
Michael J. Spencer 1:f5ac63519541 144 ip_addr_set(&pcb->local_ip, ipaddr);
Michael J. Spencer 1:f5ac63519541 145 return ERR_OK;
Michael J. Spencer 1:f5ac63519541 146 }
Michael J. Spencer 1:f5ac63519541 147
Michael J. Spencer 1:f5ac63519541 148 /**
Michael J. Spencer 1:f5ac63519541 149 * Connect an RAW PCB. This function is required by upper layers
Michael J. Spencer 1:f5ac63519541 150 * of lwip. Using the raw api you could use raw_sendto() instead
Michael J. Spencer 1:f5ac63519541 151 *
Michael J. Spencer 1:f5ac63519541 152 * This will associate the RAW PCB with the remote address.
Michael J. Spencer 1:f5ac63519541 153 *
Michael J. Spencer 1:f5ac63519541 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
Michael J. Spencer 1:f5ac63519541 155 * @param ipaddr remote IP address to connect with.
Michael J. Spencer 1:f5ac63519541 156 *
Michael J. Spencer 1:f5ac63519541 157 * @return lwIP error code
Michael J. Spencer 1:f5ac63519541 158 *
Michael J. Spencer 1:f5ac63519541 159 * @see raw_disconnect() and raw_sendto()
Michael J. Spencer 1:f5ac63519541 160 */
Michael J. Spencer 1:f5ac63519541 161 err_t
Michael J. Spencer 1:f5ac63519541 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
Michael J. Spencer 1:f5ac63519541 163 {
Michael J. Spencer 1:f5ac63519541 164 ip_addr_set(&pcb->remote_ip, ipaddr);
Michael J. Spencer 1:f5ac63519541 165 return ERR_OK;
Michael J. Spencer 1:f5ac63519541 166 }
Michael J. Spencer 1:f5ac63519541 167
Michael J. Spencer 1:f5ac63519541 168
Michael J. Spencer 1:f5ac63519541 169 /**
Michael J. Spencer 1:f5ac63519541 170 * Set the callback function for received packets that match the
Michael J. Spencer 1:f5ac63519541 171 * raw PCB's protocol and binding.
Michael J. Spencer 1:f5ac63519541 172 *
Michael J. Spencer 1:f5ac63519541 173 * The callback function MUST either
Michael J. Spencer 1:f5ac63519541 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
Michael J. Spencer 1:f5ac63519541 175 * packet will not be passed to other raw PCBs or other protocol layers.
Michael J. Spencer 1:f5ac63519541 176 * - not free the packet, and return zero. The packet will be matched
Michael J. Spencer 1:f5ac63519541 177 * against further PCBs and/or forwarded to another protocol layers.
Michael J. Spencer 1:f5ac63519541 178 *
Michael J. Spencer 1:f5ac63519541 179 * @return non-zero if the packet was free()d, zero if the packet remains
Michael J. Spencer 1:f5ac63519541 180 * available for others.
Michael J. Spencer 1:f5ac63519541 181 */
Michael J. Spencer 1:f5ac63519541 182 void
Michael J. Spencer 1:f5ac63519541 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
Michael J. Spencer 1:f5ac63519541 184 {
Michael J. Spencer 1:f5ac63519541 185 /* remember recv() callback and user data */
Michael J. Spencer 1:f5ac63519541 186 pcb->recv = recv;
Michael J. Spencer 1:f5ac63519541 187 pcb->recv_arg = recv_arg;
Michael J. Spencer 1:f5ac63519541 188 }
Michael J. Spencer 1:f5ac63519541 189
Michael J. Spencer 1:f5ac63519541 190 /**
Michael J. Spencer 1:f5ac63519541 191 * Send the raw IP packet to the given address. Note that actually you cannot
Michael J. Spencer 1:f5ac63519541 192 * modify the IP headers (this is inconsistent with the receive callback where
Michael J. Spencer 1:f5ac63519541 193 * you actually get the IP headers), you can only specify the IP payload here.
Michael J. Spencer 1:f5ac63519541 194 * It requires some more changes in lwIP. (there will be a raw_send() function
Michael J. Spencer 1:f5ac63519541 195 * then.)
Michael J. Spencer 1:f5ac63519541 196 *
Michael J. Spencer 1:f5ac63519541 197 * @param pcb the raw pcb which to send
Michael J. Spencer 1:f5ac63519541 198 * @param p the IP payload to send
Michael J. Spencer 1:f5ac63519541 199 * @param ipaddr the destination address of the IP packet
Michael J. Spencer 1:f5ac63519541 200 *
Michael J. Spencer 1:f5ac63519541 201 */
Michael J. Spencer 1:f5ac63519541 202 err_t
Michael J. Spencer 1:f5ac63519541 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
Michael J. Spencer 1:f5ac63519541 204 {
Michael J. Spencer 1:f5ac63519541 205 err_t err;
Michael J. Spencer 1:f5ac63519541 206 struct netif *netif;
Michael J. Spencer 1:f5ac63519541 207 ip_addr_t *src_ip;
Michael J. Spencer 1:f5ac63519541 208 struct pbuf *q; /* q will be sent down the stack */
Michael J. Spencer 1:f5ac63519541 209
Michael J. Spencer 1:f5ac63519541 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
Michael J. Spencer 1:f5ac63519541 211
Michael J. Spencer 1:f5ac63519541 212 /* not enough space to add an IP header to first pbuf in given p chain? */
Michael J. Spencer 1:f5ac63519541 213 if (pbuf_header(p, IP_HLEN)) {
Michael J. Spencer 1:f5ac63519541 214 /* allocate header in new pbuf */
Michael J. Spencer 1:f5ac63519541 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
Michael J. Spencer 1:f5ac63519541 216 /* new header pbuf could not be allocated? */
Michael J. Spencer 1:f5ac63519541 217 if (q == NULL) {
Michael J. Spencer 1:f5ac63519541 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
Michael J. Spencer 1:f5ac63519541 219 return ERR_MEM;
Michael J. Spencer 1:f5ac63519541 220 }
Michael J. Spencer 1:f5ac63519541 221 /* chain header q in front of given pbuf p */
Michael J. Spencer 1:f5ac63519541 222 pbuf_chain(q, p);
Michael J. Spencer 1:f5ac63519541 223 /* { first pbuf q points to header pbuf } */
Michael J. Spencer 1:f5ac63519541 224 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
Michael J. Spencer 1:f5ac63519541 225 } else {
Michael J. Spencer 1:f5ac63519541 226 /* first pbuf q equals given pbuf */
Michael J. Spencer 1:f5ac63519541 227 q = p;
Michael J. Spencer 1:f5ac63519541 228 if(pbuf_header(q, -IP_HLEN)) {
Michael J. Spencer 1:f5ac63519541 229 LWIP_ASSERT("Can't restore header we just removed!", 0);
Michael J. Spencer 1:f5ac63519541 230 return ERR_MEM;
Michael J. Spencer 1:f5ac63519541 231 }
Michael J. Spencer 1:f5ac63519541 232 }
Michael J. Spencer 1:f5ac63519541 233
Michael J. Spencer 1:f5ac63519541 234 if ((netif = ip_route(ipaddr)) == NULL) {
Michael J. Spencer 1:f5ac63519541 235 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
Michael J. Spencer 1:f5ac63519541 236 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
Michael J. Spencer 1:f5ac63519541 237 /* free any temporary header pbuf allocated by pbuf_header() */
Michael J. Spencer 1:f5ac63519541 238 if (q != p) {
Michael J. Spencer 1:f5ac63519541 239 pbuf_free(q);
Michael J. Spencer 1:f5ac63519541 240 }
Michael J. Spencer 1:f5ac63519541 241 return ERR_RTE;
Michael J. Spencer 1:f5ac63519541 242 }
Michael J. Spencer 1:f5ac63519541 243
Michael J. Spencer 1:f5ac63519541 244 #if IP_SOF_BROADCAST
Michael J. Spencer 1:f5ac63519541 245 /* broadcast filter? */
Michael J. Spencer 1:f5ac63519541 246 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
Michael J. Spencer 1:f5ac63519541 247 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
Michael J. Spencer 1:f5ac63519541 248 /* free any temporary header pbuf allocated by pbuf_header() */
Michael J. Spencer 1:f5ac63519541 249 if (q != p) {
Michael J. Spencer 1:f5ac63519541 250 pbuf_free(q);
Michael J. Spencer 1:f5ac63519541 251 }
Michael J. Spencer 1:f5ac63519541 252 return ERR_VAL;
Michael J. Spencer 1:f5ac63519541 253 }
Michael J. Spencer 1:f5ac63519541 254 #endif /* IP_SOF_BROADCAST */
Michael J. Spencer 1:f5ac63519541 255
Michael J. Spencer 1:f5ac63519541 256 if (ip_addr_isany(&pcb->local_ip)) {
Michael J. Spencer 1:f5ac63519541 257 /* use outgoing network interface IP address as source address */
Michael J. Spencer 1:f5ac63519541 258 src_ip = &(netif->ip_addr);
Michael J. Spencer 1:f5ac63519541 259 } else {
Michael J. Spencer 1:f5ac63519541 260 /* use RAW PCB local IP address as source address */
Michael J. Spencer 1:f5ac63519541 261 src_ip = &(pcb->local_ip);
Michael J. Spencer 1:f5ac63519541 262 }
Michael J. Spencer 1:f5ac63519541 263
Michael J. Spencer 1:f5ac63519541 264 #if LWIP_NETIF_HWADDRHINT
Michael J. Spencer 1:f5ac63519541 265 netif->addr_hint = &(pcb->addr_hint);
Michael J. Spencer 1:f5ac63519541 266 #endif /* LWIP_NETIF_HWADDRHINT*/
Michael J. Spencer 1:f5ac63519541 267 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
Michael J. Spencer 1:f5ac63519541 268 #if LWIP_NETIF_HWADDRHINT
Michael J. Spencer 1:f5ac63519541 269 netif->addr_hint = NULL;
Michael J. Spencer 1:f5ac63519541 270 #endif /* LWIP_NETIF_HWADDRHINT*/
Michael J. Spencer 1:f5ac63519541 271
Michael J. Spencer 1:f5ac63519541 272 /* did we chain a header earlier? */
Michael J. Spencer 1:f5ac63519541 273 if (q != p) {
Michael J. Spencer 1:f5ac63519541 274 /* free the header */
Michael J. Spencer 1:f5ac63519541 275 pbuf_free(q);
Michael J. Spencer 1:f5ac63519541 276 }
Michael J. Spencer 1:f5ac63519541 277 return err;
Michael J. Spencer 1:f5ac63519541 278 }
Michael J. Spencer 1:f5ac63519541 279
Michael J. Spencer 1:f5ac63519541 280 /**
Michael J. Spencer 1:f5ac63519541 281 * Send the raw IP packet to the address given by raw_connect()
Michael J. Spencer 1:f5ac63519541 282 *
Michael J. Spencer 1:f5ac63519541 283 * @param pcb the raw pcb which to send
Michael J. Spencer 1:f5ac63519541 284 * @param p the IP payload to send
Michael J. Spencer 1:f5ac63519541 285 *
Michael J. Spencer 1:f5ac63519541 286 */
Michael J. Spencer 1:f5ac63519541 287 err_t
Michael J. Spencer 1:f5ac63519541 288 raw_send(struct raw_pcb *pcb, struct pbuf *p)
Michael J. Spencer 1:f5ac63519541 289 {
Michael J. Spencer 1:f5ac63519541 290 return raw_sendto(pcb, p, &pcb->remote_ip);
Michael J. Spencer 1:f5ac63519541 291 }
Michael J. Spencer 1:f5ac63519541 292
Michael J. Spencer 1:f5ac63519541 293 /**
Michael J. Spencer 1:f5ac63519541 294 * Remove an RAW PCB.
Michael J. Spencer 1:f5ac63519541 295 *
Michael J. Spencer 1:f5ac63519541 296 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
Michael J. Spencer 1:f5ac63519541 297 * RAW PCB's and the data structure is freed from memory.
Michael J. Spencer 1:f5ac63519541 298 *
Michael J. Spencer 1:f5ac63519541 299 * @see raw_new()
Michael J. Spencer 1:f5ac63519541 300 */
Michael J. Spencer 1:f5ac63519541 301 void
Michael J. Spencer 1:f5ac63519541 302 raw_remove(struct raw_pcb *pcb)
Michael J. Spencer 1:f5ac63519541 303 {
Michael J. Spencer 1:f5ac63519541 304 struct raw_pcb *pcb2;
Michael J. Spencer 1:f5ac63519541 305 /* pcb to be removed is first in list? */
Michael J. Spencer 1:f5ac63519541 306 if (raw_pcbs == pcb) {
Michael J. Spencer 1:f5ac63519541 307 /* make list start at 2nd pcb */
Michael J. Spencer 1:f5ac63519541 308 raw_pcbs = raw_pcbs->next;
Michael J. Spencer 1:f5ac63519541 309 /* pcb not 1st in list */
Michael J. Spencer 1:f5ac63519541 310 } else {
Michael J. Spencer 1:f5ac63519541 311 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
Michael J. Spencer 1:f5ac63519541 312 /* find pcb in raw_pcbs list */
Michael J. Spencer 1:f5ac63519541 313 if (pcb2->next != NULL && pcb2->next == pcb) {
Michael J. Spencer 1:f5ac63519541 314 /* remove pcb from list */
Michael J. Spencer 1:f5ac63519541 315 pcb2->next = pcb->next;
Michael J. Spencer 1:f5ac63519541 316 }
Michael J. Spencer 1:f5ac63519541 317 }
Michael J. Spencer 1:f5ac63519541 318 }
Michael J. Spencer 1:f5ac63519541 319 memp_free(MEMP_RAW_PCB, pcb);
Michael J. Spencer 1:f5ac63519541 320 }
Michael J. Spencer 1:f5ac63519541 321
Michael J. Spencer 1:f5ac63519541 322 /**
Michael J. Spencer 1:f5ac63519541 323 * Create a RAW PCB.
Michael J. Spencer 1:f5ac63519541 324 *
Michael J. Spencer 1:f5ac63519541 325 * @return The RAW PCB which was created. NULL if the PCB data structure
Michael J. Spencer 1:f5ac63519541 326 * could not be allocated.
Michael J. Spencer 1:f5ac63519541 327 *
Michael J. Spencer 1:f5ac63519541 328 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
Michael J. Spencer 1:f5ac63519541 329 *
Michael J. Spencer 1:f5ac63519541 330 * @see raw_remove()
Michael J. Spencer 1:f5ac63519541 331 */
Michael J. Spencer 1:f5ac63519541 332 struct raw_pcb *
Michael J. Spencer 1:f5ac63519541 333 raw_new(u8_t proto)
Michael J. Spencer 1:f5ac63519541 334 {
Michael J. Spencer 1:f5ac63519541 335 struct raw_pcb *pcb;
Michael J. Spencer 1:f5ac63519541 336
Michael J. Spencer 1:f5ac63519541 337 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
Michael J. Spencer 1:f5ac63519541 338
Michael J. Spencer 1:f5ac63519541 339 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
Michael J. Spencer 1:f5ac63519541 340 /* could allocate RAW PCB? */
Michael J. Spencer 1:f5ac63519541 341 if (pcb != NULL) {
Michael J. Spencer 1:f5ac63519541 342 /* initialize PCB to all zeroes */
Michael J. Spencer 1:f5ac63519541 343 memset(pcb, 0, sizeof(struct raw_pcb));
Michael J. Spencer 1:f5ac63519541 344 pcb->protocol = proto;
Michael J. Spencer 1:f5ac63519541 345 pcb->ttl = RAW_TTL;
Michael J. Spencer 1:f5ac63519541 346 pcb->next = raw_pcbs;
Michael J. Spencer 1:f5ac63519541 347 raw_pcbs = pcb;
Michael J. Spencer 1:f5ac63519541 348 }
Michael J. Spencer 1:f5ac63519541 349 return pcb;
Michael J. Spencer 1:f5ac63519541 350 }
Michael J. Spencer 1:f5ac63519541 351
Michael J. Spencer 1:f5ac63519541 352 #endif /* LWIP_RAW */