Adam Green / EthernetInterface

Deprecated fork of old network stack source from github. Please use official library instead: https://mbed.org/users/mbed_official/code/EthernetInterface/

lwip/core/raw.c@1:eadc868c2acf, 2013-10-26 (annotated)

Committer:
AdamGreen
Date:
Sat Oct 26 08:51:36 2013 +0000
Revision:
1:eadc868c2acf
Parent:
0:3b00827bb0b7 
Fix TCP checksum bug and stranded large TCP segments.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /**
AdamGreen 0:3b00827bb0b7 2 * @file
AdamGreen 0:3b00827bb0b7 3 * Implementation of raw protocol PCBs for low-level handling of
AdamGreen 0:3b00827bb0b7 4 * different types of protocols besides (or overriding) those
AdamGreen 0:3b00827bb0b7 5 * already available in lwIP.
AdamGreen 0:3b00827bb0b7 6 *
AdamGreen 0:3b00827bb0b7 7 */
AdamGreen 0:3b00827bb0b7 8
AdamGreen 0:3b00827bb0b7 9 /*
AdamGreen 0:3b00827bb0b7 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
AdamGreen 0:3b00827bb0b7 11 * All rights reserved.
AdamGreen 0:3b00827bb0b7 12 *
AdamGreen 0:3b00827bb0b7 13 * Redistribution and use in source and binary forms, with or without modification,
AdamGreen 0:3b00827bb0b7 14 * are permitted provided that the following conditions are met:
AdamGreen 0:3b00827bb0b7 15 *
AdamGreen 0:3b00827bb0b7 16 * 1. Redistributions of source code must retain the above copyright notice,
AdamGreen 0:3b00827bb0b7 17 * this list of conditions and the following disclaimer.
AdamGreen 0:3b00827bb0b7 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
AdamGreen 0:3b00827bb0b7 19 * this list of conditions and the following disclaimer in the documentation
AdamGreen 0:3b00827bb0b7 20 * and/or other materials provided with the distribution.
AdamGreen 0:3b00827bb0b7 21 * 3. The name of the author may not be used to endorse or promote products
AdamGreen 0:3b00827bb0b7 22 * derived from this software without specific prior written permission.
AdamGreen 0:3b00827bb0b7 23 *
AdamGreen 0:3b00827bb0b7 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
AdamGreen 0:3b00827bb0b7 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
AdamGreen 0:3b00827bb0b7 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
AdamGreen 0:3b00827bb0b7 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
AdamGreen 0:3b00827bb0b7 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
AdamGreen 0:3b00827bb0b7 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
AdamGreen 0:3b00827bb0b7 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
AdamGreen 0:3b00827bb0b7 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
AdamGreen 0:3b00827bb0b7 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
AdamGreen 0:3b00827bb0b7 33 * OF SUCH DAMAGE.
AdamGreen 0:3b00827bb0b7 34 *
AdamGreen 0:3b00827bb0b7 35 * This file is part of the lwIP TCP/IP stack.
AdamGreen 0:3b00827bb0b7 36 *
AdamGreen 0:3b00827bb0b7 37 * Author: Adam Dunkels <adam@sics.se>
AdamGreen 0:3b00827bb0b7 38 *
AdamGreen 0:3b00827bb0b7 39 */
AdamGreen 0:3b00827bb0b7 40
AdamGreen 0:3b00827bb0b7 41 #include "lwip/opt.h"
AdamGreen 0:3b00827bb0b7 42
AdamGreen 0:3b00827bb0b7 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:3b00827bb0b7 44
AdamGreen 0:3b00827bb0b7 45 #include "lwip/def.h"
AdamGreen 0:3b00827bb0b7 46 #include "lwip/memp.h"
AdamGreen 0:3b00827bb0b7 47 #include "lwip/ip_addr.h"
AdamGreen 0:3b00827bb0b7 48 #include "lwip/netif.h"
AdamGreen 0:3b00827bb0b7 49 #include "lwip/raw.h"
AdamGreen 0:3b00827bb0b7 50 #include "lwip/stats.h"
AdamGreen 0:3b00827bb0b7 51 #include "arch/perf.h"
AdamGreen 0:3b00827bb0b7 52
AdamGreen 0:3b00827bb0b7 53 #include <string.h>
AdamGreen 0:3b00827bb0b7 54
AdamGreen 0:3b00827bb0b7 55 /** The list of RAW PCBs */
AdamGreen 0:3b00827bb0b7 56 static struct raw_pcb *raw_pcbs;
AdamGreen 0:3b00827bb0b7 57
AdamGreen 0:3b00827bb0b7 58 /**
AdamGreen 0:3b00827bb0b7 59 * Determine if in incoming IP packet is covered by a RAW PCB
AdamGreen 0:3b00827bb0b7 60 * and if so, pass it to a user-provided receive callback function.
AdamGreen 0:3b00827bb0b7 61 *
AdamGreen 0:3b00827bb0b7 62 * Given an incoming IP datagram (as a chain of pbufs) this function
AdamGreen 0:3b00827bb0b7 63 * finds a corresponding RAW PCB and calls the corresponding receive
AdamGreen 0:3b00827bb0b7 64 * callback function.
AdamGreen 0:3b00827bb0b7 65 *
AdamGreen 0:3b00827bb0b7 66 * @param p pbuf to be demultiplexed to a RAW PCB.
AdamGreen 0:3b00827bb0b7 67 * @param inp network interface on which the datagram was received.
AdamGreen 0:3b00827bb0b7 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
AdamGreen 0:3b00827bb0b7 69 * callback function. The caller MAY NOT not reference the
AdamGreen 0:3b00827bb0b7 70 * packet any longer, and MAY NOT call pbuf_free().
AdamGreen 0:3b00827bb0b7 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
AdamGreen 0:3b00827bb0b7 72 * caller).
AdamGreen 0:3b00827bb0b7 73 *
AdamGreen 0:3b00827bb0b7 74 */
AdamGreen 0:3b00827bb0b7 75 u8_t
AdamGreen 0:3b00827bb0b7 76 raw_input(struct pbuf *p, struct netif *inp)
AdamGreen 0:3b00827bb0b7 77 {
AdamGreen 0:3b00827bb0b7 78 struct raw_pcb *pcb, *prev;
AdamGreen 0:3b00827bb0b7 79 struct ip_hdr *iphdr;
AdamGreen 0:3b00827bb0b7 80 s16_t proto;
AdamGreen 0:3b00827bb0b7 81 u8_t eaten = 0;
AdamGreen 0:3b00827bb0b7 82
AdamGreen 0:3b00827bb0b7 83 LWIP_UNUSED_ARG(inp);
AdamGreen 0:3b00827bb0b7 84
AdamGreen 0:3b00827bb0b7 85 iphdr = (struct ip_hdr *)p->payload;
AdamGreen 0:3b00827bb0b7 86 proto = IPH_PROTO(iphdr);
AdamGreen 0:3b00827bb0b7 87
AdamGreen 0:3b00827bb0b7 88 prev = NULL;
AdamGreen 0:3b00827bb0b7 89 pcb = raw_pcbs;
AdamGreen 0:3b00827bb0b7 90 /* loop through all raw pcbs until the packet is eaten by one */
AdamGreen 0:3b00827bb0b7 91 /* this allows multiple pcbs to match against the packet by design */
AdamGreen 0:3b00827bb0b7 92 while ((eaten == 0) && (pcb != NULL)) {
AdamGreen 0:3b00827bb0b7 93 if ((pcb->protocol == proto) &&
AdamGreen 0:3b00827bb0b7 94 (ip_addr_isany(&pcb->local_ip) ||
AdamGreen 0:3b00827bb0b7 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
AdamGreen 0:3b00827bb0b7 96 #if IP_SOF_BROADCAST_RECV
AdamGreen 0:3b00827bb0b7 97 /* broadcast filter? */
AdamGreen 0:3b00827bb0b7 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
AdamGreen 0:3b00827bb0b7 99 #endif /* IP_SOF_BROADCAST_RECV */
AdamGreen 0:3b00827bb0b7 100 {
AdamGreen 0:3b00827bb0b7 101 /* receive callback function available? */
AdamGreen 0:3b00827bb0b7 102 if (pcb->recv != NULL) {
AdamGreen 0:3b00827bb0b7 103 /* the receive callback function did not eat the packet? */
AdamGreen 0:3b00827bb0b7 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
AdamGreen 0:3b00827bb0b7 105 /* receive function ate the packet */
AdamGreen 0:3b00827bb0b7 106 p = NULL;
AdamGreen 0:3b00827bb0b7 107 eaten = 1;
AdamGreen 0:3b00827bb0b7 108 if (prev != NULL) {
AdamGreen 0:3b00827bb0b7 109 /* move the pcb to the front of raw_pcbs so that is
AdamGreen 0:3b00827bb0b7 110 found faster next time */
AdamGreen 0:3b00827bb0b7 111 prev->next = pcb->next;
AdamGreen 0:3b00827bb0b7 112 pcb->next = raw_pcbs;
AdamGreen 0:3b00827bb0b7 113 raw_pcbs = pcb;
AdamGreen 0:3b00827bb0b7 114 }
AdamGreen 0:3b00827bb0b7 115 }
AdamGreen 0:3b00827bb0b7 116 }
AdamGreen 0:3b00827bb0b7 117 /* no receive callback function was set for this raw PCB */
AdamGreen 0:3b00827bb0b7 118 }
AdamGreen 0:3b00827bb0b7 119 /* drop the packet */
AdamGreen 0:3b00827bb0b7 120 }
AdamGreen 0:3b00827bb0b7 121 prev = pcb;
AdamGreen 0:3b00827bb0b7 122 pcb = pcb->next;
AdamGreen 0:3b00827bb0b7 123 }
AdamGreen 0:3b00827bb0b7 124 return eaten;
AdamGreen 0:3b00827bb0b7 125 }
AdamGreen 0:3b00827bb0b7 126
AdamGreen 0:3b00827bb0b7 127 /**
AdamGreen 0:3b00827bb0b7 128 * Bind a RAW PCB.
AdamGreen 0:3b00827bb0b7 129 *
AdamGreen 0:3b00827bb0b7 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
AdamGreen 0:3b00827bb0b7 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
AdamGreen 0:3b00827bb0b7 132 * bind to all local interfaces.
AdamGreen 0:3b00827bb0b7 133 *
AdamGreen 0:3b00827bb0b7 134 * @return lwIP error code.
AdamGreen 0:3b00827bb0b7 135 * - ERR_OK. Successful. No error occured.
AdamGreen 0:3b00827bb0b7 136 * - ERR_USE. The specified IP address is already bound to by
AdamGreen 0:3b00827bb0b7 137 * another RAW PCB.
AdamGreen 0:3b00827bb0b7 138 *
AdamGreen 0:3b00827bb0b7 139 * @see raw_disconnect()
AdamGreen 0:3b00827bb0b7 140 */
AdamGreen 0:3b00827bb0b7 141 err_t
AdamGreen 0:3b00827bb0b7 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 143 {
AdamGreen 0:3b00827bb0b7 144 ip_addr_set(&pcb->local_ip, ipaddr);
AdamGreen 0:3b00827bb0b7 145 return ERR_OK;
AdamGreen 0:3b00827bb0b7 146 }
AdamGreen 0:3b00827bb0b7 147
AdamGreen 0:3b00827bb0b7 148 /**
AdamGreen 0:3b00827bb0b7 149 * Connect an RAW PCB. This function is required by upper layers
AdamGreen 0:3b00827bb0b7 150 * of lwip. Using the raw api you could use raw_sendto() instead
AdamGreen 0:3b00827bb0b7 151 *
AdamGreen 0:3b00827bb0b7 152 * This will associate the RAW PCB with the remote address.
AdamGreen 0:3b00827bb0b7 153 *
AdamGreen 0:3b00827bb0b7 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
AdamGreen 0:3b00827bb0b7 155 * @param ipaddr remote IP address to connect with.
AdamGreen 0:3b00827bb0b7 156 *
AdamGreen 0:3b00827bb0b7 157 * @return lwIP error code
AdamGreen 0:3b00827bb0b7 158 *
AdamGreen 0:3b00827bb0b7 159 * @see raw_disconnect() and raw_sendto()
AdamGreen 0:3b00827bb0b7 160 */
AdamGreen 0:3b00827bb0b7 161 err_t
AdamGreen 0:3b00827bb0b7 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 163 {
AdamGreen 0:3b00827bb0b7 164 ip_addr_set(&pcb->remote_ip, ipaddr);
AdamGreen 0:3b00827bb0b7 165 return ERR_OK;
AdamGreen 0:3b00827bb0b7 166 }
AdamGreen 0:3b00827bb0b7 167
AdamGreen 0:3b00827bb0b7 168
AdamGreen 0:3b00827bb0b7 169 /**
AdamGreen 0:3b00827bb0b7 170 * Set the callback function for received packets that match the
AdamGreen 0:3b00827bb0b7 171 * raw PCB's protocol and binding.
AdamGreen 0:3b00827bb0b7 172 *
AdamGreen 0:3b00827bb0b7 173 * The callback function MUST either
AdamGreen 0:3b00827bb0b7 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
AdamGreen 0:3b00827bb0b7 175 * packet will not be passed to other raw PCBs or other protocol layers.
AdamGreen 0:3b00827bb0b7 176 * - not free the packet, and return zero. The packet will be matched
AdamGreen 0:3b00827bb0b7 177 * against further PCBs and/or forwarded to another protocol layers.
AdamGreen 0:3b00827bb0b7 178 *
AdamGreen 0:3b00827bb0b7 179 * @return non-zero if the packet was free()d, zero if the packet remains
AdamGreen 0:3b00827bb0b7 180 * available for others.
AdamGreen 0:3b00827bb0b7 181 */
AdamGreen 0:3b00827bb0b7 182 void
AdamGreen 0:3b00827bb0b7 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
AdamGreen 0:3b00827bb0b7 184 {
AdamGreen 0:3b00827bb0b7 185 /* remember recv() callback and user data */
AdamGreen 0:3b00827bb0b7 186 pcb->recv = recv;
AdamGreen 0:3b00827bb0b7 187 pcb->recv_arg = recv_arg;
AdamGreen 0:3b00827bb0b7 188 }
AdamGreen 0:3b00827bb0b7 189
AdamGreen 0:3b00827bb0b7 190 /**
AdamGreen 0:3b00827bb0b7 191 * Send the raw IP packet to the given address. Note that actually you cannot
AdamGreen 0:3b00827bb0b7 192 * modify the IP headers (this is inconsistent with the receive callback where
AdamGreen 0:3b00827bb0b7 193 * you actually get the IP headers), you can only specify the IP payload here.
AdamGreen 0:3b00827bb0b7 194 * It requires some more changes in lwIP. (there will be a raw_send() function
AdamGreen 0:3b00827bb0b7 195 * then.)
AdamGreen 0:3b00827bb0b7 196 *
AdamGreen 0:3b00827bb0b7 197 * @param pcb the raw pcb which to send
AdamGreen 0:3b00827bb0b7 198 * @param p the IP payload to send
AdamGreen 0:3b00827bb0b7 199 * @param ipaddr the destination address of the IP packet
AdamGreen 0:3b00827bb0b7 200 *
AdamGreen 0:3b00827bb0b7 201 */
AdamGreen 0:3b00827bb0b7 202 err_t
AdamGreen 0:3b00827bb0b7 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 204 {
AdamGreen 0:3b00827bb0b7 205 err_t err;
AdamGreen 0:3b00827bb0b7 206 struct netif *netif;
AdamGreen 0:3b00827bb0b7 207 ip_addr_t *src_ip;
AdamGreen 0:3b00827bb0b7 208 struct pbuf *q; /* q will be sent down the stack */
AdamGreen 0:3b00827bb0b7 209
AdamGreen 0:3b00827bb0b7 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
AdamGreen 0:3b00827bb0b7 211
AdamGreen 0:3b00827bb0b7 212 /* not enough space to add an IP header to first pbuf in given p chain? */
AdamGreen 0:3b00827bb0b7 213 if (pbuf_header(p, IP_HLEN)) {
AdamGreen 0:3b00827bb0b7 214 /* allocate header in new pbuf */
AdamGreen 0:3b00827bb0b7 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
AdamGreen 0:3b00827bb0b7 216 /* new header pbuf could not be allocated? */
AdamGreen 0:3b00827bb0b7 217 if (q == NULL) {
AdamGreen 0:3b00827bb0b7 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
AdamGreen 0:3b00827bb0b7 219 return ERR_MEM;
AdamGreen 0:3b00827bb0b7 220 }
AdamGreen 0:3b00827bb0b7 221 if (p->tot_len != 0) {
AdamGreen 0:3b00827bb0b7 222 /* chain header q in front of given pbuf p */
AdamGreen 0:3b00827bb0b7 223 pbuf_chain(q, p);
AdamGreen 0:3b00827bb0b7 224 }
AdamGreen 0:3b00827bb0b7 225 /* { first pbuf q points to header pbuf } */
AdamGreen 0:3b00827bb0b7 226 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
AdamGreen 0:3b00827bb0b7 227 } else {
AdamGreen 0:3b00827bb0b7 228 /* first pbuf q equals given pbuf */
AdamGreen 0:3b00827bb0b7 229 q = p;
AdamGreen 0:3b00827bb0b7 230 if(pbuf_header(q, -IP_HLEN)) {
AdamGreen 0:3b00827bb0b7 231 LWIP_ASSERT("Can't restore header we just removed!", 0);
AdamGreen 0:3b00827bb0b7 232 return ERR_MEM;
AdamGreen 0:3b00827bb0b7 233 }
AdamGreen 0:3b00827bb0b7 234 }
AdamGreen 0:3b00827bb0b7 235
AdamGreen 0:3b00827bb0b7 236 if ((netif = ip_route(ipaddr)) == NULL) {
AdamGreen 0:3b00827bb0b7 237 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
AdamGreen 0:3b00827bb0b7 238 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
AdamGreen 0:3b00827bb0b7 239 /* free any temporary header pbuf allocated by pbuf_header() */
AdamGreen 0:3b00827bb0b7 240 if (q != p) {
AdamGreen 0:3b00827bb0b7 241 pbuf_free(q);
AdamGreen 0:3b00827bb0b7 242 }
AdamGreen 0:3b00827bb0b7 243 return ERR_RTE;
AdamGreen 0:3b00827bb0b7 244 }
AdamGreen 0:3b00827bb0b7 245
AdamGreen 0:3b00827bb0b7 246 #if IP_SOF_BROADCAST
AdamGreen 0:3b00827bb0b7 247 /* broadcast filter? */
AdamGreen 0:3b00827bb0b7 248 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
AdamGreen 0:3b00827bb0b7 249 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
AdamGreen 0:3b00827bb0b7 250 /* free any temporary header pbuf allocated by pbuf_header() */
AdamGreen 0:3b00827bb0b7 251 if (q != p) {
AdamGreen 0:3b00827bb0b7 252 pbuf_free(q);
AdamGreen 0:3b00827bb0b7 253 }
AdamGreen 0:3b00827bb0b7 254 return ERR_VAL;
AdamGreen 0:3b00827bb0b7 255 }
AdamGreen 0:3b00827bb0b7 256 #endif /* IP_SOF_BROADCAST */
AdamGreen 0:3b00827bb0b7 257
AdamGreen 0:3b00827bb0b7 258 if (ip_addr_isany(&pcb->local_ip)) {
AdamGreen 0:3b00827bb0b7 259 /* use outgoing network interface IP address as source address */
AdamGreen 0:3b00827bb0b7 260 src_ip = &(netif->ip_addr);
AdamGreen 0:3b00827bb0b7 261 } else {
AdamGreen 0:3b00827bb0b7 262 /* use RAW PCB local IP address as source address */
AdamGreen 0:3b00827bb0b7 263 src_ip = &(pcb->local_ip);
AdamGreen 0:3b00827bb0b7 264 }
AdamGreen 0:3b00827bb0b7 265
AdamGreen 0:3b00827bb0b7 266 #if LWIP_NETIF_HWADDRHINT
AdamGreen 0:3b00827bb0b7 267 netif->addr_hint = &(pcb->addr_hint);
AdamGreen 0:3b00827bb0b7 268 #endif /* LWIP_NETIF_HWADDRHINT*/
AdamGreen 0:3b00827bb0b7 269 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
AdamGreen 0:3b00827bb0b7 270 #if LWIP_NETIF_HWADDRHINT
AdamGreen 0:3b00827bb0b7 271 netif->addr_hint = NULL;
AdamGreen 0:3b00827bb0b7 272 #endif /* LWIP_NETIF_HWADDRHINT*/
AdamGreen 0:3b00827bb0b7 273
AdamGreen 0:3b00827bb0b7 274 /* did we chain a header earlier? */
AdamGreen 0:3b00827bb0b7 275 if (q != p) {
AdamGreen 0:3b00827bb0b7 276 /* free the header */
AdamGreen 0:3b00827bb0b7 277 pbuf_free(q);
AdamGreen 0:3b00827bb0b7 278 }
AdamGreen 0:3b00827bb0b7 279 return err;
AdamGreen 0:3b00827bb0b7 280 }
AdamGreen 0:3b00827bb0b7 281
AdamGreen 0:3b00827bb0b7 282 /**
AdamGreen 0:3b00827bb0b7 283 * Send the raw IP packet to the address given by raw_connect()
AdamGreen 0:3b00827bb0b7 284 *
AdamGreen 0:3b00827bb0b7 285 * @param pcb the raw pcb which to send
AdamGreen 0:3b00827bb0b7 286 * @param p the IP payload to send
AdamGreen 0:3b00827bb0b7 287 *
AdamGreen 0:3b00827bb0b7 288 */
AdamGreen 0:3b00827bb0b7 289 err_t
AdamGreen 0:3b00827bb0b7 290 raw_send(struct raw_pcb *pcb, struct pbuf *p)
AdamGreen 0:3b00827bb0b7 291 {
AdamGreen 0:3b00827bb0b7 292 return raw_sendto(pcb, p, &pcb->remote_ip);
AdamGreen 0:3b00827bb0b7 293 }
AdamGreen 0:3b00827bb0b7 294
AdamGreen 0:3b00827bb0b7 295 /**
AdamGreen 0:3b00827bb0b7 296 * Remove an RAW PCB.
AdamGreen 0:3b00827bb0b7 297 *
AdamGreen 0:3b00827bb0b7 298 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
AdamGreen 0:3b00827bb0b7 299 * RAW PCB's and the data structure is freed from memory.
AdamGreen 0:3b00827bb0b7 300 *
AdamGreen 0:3b00827bb0b7 301 * @see raw_new()
AdamGreen 0:3b00827bb0b7 302 */
AdamGreen 0:3b00827bb0b7 303 void
AdamGreen 0:3b00827bb0b7 304 raw_remove(struct raw_pcb *pcb)
AdamGreen 0:3b00827bb0b7 305 {
AdamGreen 0:3b00827bb0b7 306 struct raw_pcb *pcb2;
AdamGreen 0:3b00827bb0b7 307 /* pcb to be removed is first in list? */
AdamGreen 0:3b00827bb0b7 308 if (raw_pcbs == pcb) {
AdamGreen 0:3b00827bb0b7 309 /* make list start at 2nd pcb */
AdamGreen 0:3b00827bb0b7 310 raw_pcbs = raw_pcbs->next;
AdamGreen 0:3b00827bb0b7 311 /* pcb not 1st in list */
AdamGreen 0:3b00827bb0b7 312 } else {
AdamGreen 0:3b00827bb0b7 313 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
AdamGreen 0:3b00827bb0b7 314 /* find pcb in raw_pcbs list */
AdamGreen 0:3b00827bb0b7 315 if (pcb2->next != NULL && pcb2->next == pcb) {
AdamGreen 0:3b00827bb0b7 316 /* remove pcb from list */
AdamGreen 0:3b00827bb0b7 317 pcb2->next = pcb->next;
AdamGreen 0:3b00827bb0b7 318 }
AdamGreen 0:3b00827bb0b7 319 }
AdamGreen 0:3b00827bb0b7 320 }
AdamGreen 0:3b00827bb0b7 321 memp_free(MEMP_RAW_PCB, pcb);
AdamGreen 0:3b00827bb0b7 322 }
AdamGreen 0:3b00827bb0b7 323
AdamGreen 0:3b00827bb0b7 324 /**
AdamGreen 0:3b00827bb0b7 325 * Create a RAW PCB.
AdamGreen 0:3b00827bb0b7 326 *
AdamGreen 0:3b00827bb0b7 327 * @return The RAW PCB which was created. NULL if the PCB data structure
AdamGreen 0:3b00827bb0b7 328 * could not be allocated.
AdamGreen 0:3b00827bb0b7 329 *
AdamGreen 0:3b00827bb0b7 330 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
AdamGreen 0:3b00827bb0b7 331 *
AdamGreen 0:3b00827bb0b7 332 * @see raw_remove()
AdamGreen 0:3b00827bb0b7 333 */
AdamGreen 0:3b00827bb0b7 334 struct raw_pcb *
AdamGreen 0:3b00827bb0b7 335 raw_new(u8_t proto)
AdamGreen 0:3b00827bb0b7 336 {
AdamGreen 0:3b00827bb0b7 337 struct raw_pcb *pcb;
AdamGreen 0:3b00827bb0b7 338
AdamGreen 0:3b00827bb0b7 339 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
AdamGreen 0:3b00827bb0b7 340
AdamGreen 0:3b00827bb0b7 341 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
AdamGreen 0:3b00827bb0b7 342 /* could allocate RAW PCB? */
AdamGreen 0:3b00827bb0b7 343 if (pcb != NULL) {
AdamGreen 0:3b00827bb0b7 344 /* initialize PCB to all zeroes */
AdamGreen 0:3b00827bb0b7 345 memset(pcb, 0, sizeof(struct raw_pcb));
AdamGreen 0:3b00827bb0b7 346 pcb->protocol = proto;
AdamGreen 0:3b00827bb0b7 347 pcb->ttl = RAW_TTL;
AdamGreen 0:3b00827bb0b7 348 pcb->next = raw_pcbs;
AdamGreen 0:3b00827bb0b7 349 raw_pcbs = pcb;
AdamGreen 0:3b00827bb0b7 350 }
AdamGreen 0:3b00827bb0b7 351 return pcb;
AdamGreen 0:3b00827bb0b7 352 }
AdamGreen 0:3b00827bb0b7 353
AdamGreen 0:3b00827bb0b7 354 #endif /* LWIP_RAW */