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NetServices/lwip/core/raw.c@0:4edb816d21e1, 2015-10-16 (annotated)

Committer:
ICTFBI
Date:
Fri Oct 16 14:28:26 2015 +0000
Revision:
0:4edb816d21e1
Pre-update 16-10-15

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ICTFBI 0:4edb816d21e1 1 /**
ICTFBI 0:4edb816d21e1 2 * @file
ICTFBI 0:4edb816d21e1 3 * Implementation of raw protocol PCBs for low-level handling of
ICTFBI 0:4edb816d21e1 4 * different types of protocols besides (or overriding) those
ICTFBI 0:4edb816d21e1 5 * already available in lwIP.
ICTFBI 0:4edb816d21e1 6 *
ICTFBI 0:4edb816d21e1 7 */
ICTFBI 0:4edb816d21e1 8
ICTFBI 0:4edb816d21e1 9 /*
ICTFBI 0:4edb816d21e1 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
ICTFBI 0:4edb816d21e1 11 * All rights reserved.
ICTFBI 0:4edb816d21e1 12 *
ICTFBI 0:4edb816d21e1 13 * Redistribution and use in source and binary forms, with or without modification,
ICTFBI 0:4edb816d21e1 14 * are permitted provided that the following conditions are met:
ICTFBI 0:4edb816d21e1 15 *
ICTFBI 0:4edb816d21e1 16 * 1. Redistributions of source code must retain the above copyright notice,
ICTFBI 0:4edb816d21e1 17 * this list of conditions and the following disclaimer.
ICTFBI 0:4edb816d21e1 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
ICTFBI 0:4edb816d21e1 19 * this list of conditions and the following disclaimer in the documentation
ICTFBI 0:4edb816d21e1 20 * and/or other materials provided with the distribution.
ICTFBI 0:4edb816d21e1 21 * 3. The name of the author may not be used to endorse or promote products
ICTFBI 0:4edb816d21e1 22 * derived from this software without specific prior written permission.
ICTFBI 0:4edb816d21e1 23 *
ICTFBI 0:4edb816d21e1 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
ICTFBI 0:4edb816d21e1 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
ICTFBI 0:4edb816d21e1 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
ICTFBI 0:4edb816d21e1 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
ICTFBI 0:4edb816d21e1 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
ICTFBI 0:4edb816d21e1 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
ICTFBI 0:4edb816d21e1 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
ICTFBI 0:4edb816d21e1 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
ICTFBI 0:4edb816d21e1 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
ICTFBI 0:4edb816d21e1 33 * OF SUCH DAMAGE.
ICTFBI 0:4edb816d21e1 34 *
ICTFBI 0:4edb816d21e1 35 * This file is part of the lwIP TCP/IP stack.
ICTFBI 0:4edb816d21e1 36 *
ICTFBI 0:4edb816d21e1 37 * Author: Adam Dunkels <adam@sics.se>
ICTFBI 0:4edb816d21e1 38 *
ICTFBI 0:4edb816d21e1 39 */
ICTFBI 0:4edb816d21e1 40
ICTFBI 0:4edb816d21e1 41 #include "lwip/opt.h"
ICTFBI 0:4edb816d21e1 42
ICTFBI 0:4edb816d21e1 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
ICTFBI 0:4edb816d21e1 44
ICTFBI 0:4edb816d21e1 45 #include "lwip/def.h"
ICTFBI 0:4edb816d21e1 46 #include "lwip/memp.h"
ICTFBI 0:4edb816d21e1 47 #include "lwip/ip_addr.h"
ICTFBI 0:4edb816d21e1 48 #include "lwip/netif.h"
ICTFBI 0:4edb816d21e1 49 #include "lwip/raw.h"
ICTFBI 0:4edb816d21e1 50 #include "lwip/stats.h"
ICTFBI 0:4edb816d21e1 51 #include "arch/perf.h"
ICTFBI 0:4edb816d21e1 52
ICTFBI 0:4edb816d21e1 53 #include <string.h>
ICTFBI 0:4edb816d21e1 54
ICTFBI 0:4edb816d21e1 55 /** The list of RAW PCBs */
ICTFBI 0:4edb816d21e1 56 static struct raw_pcb *raw_pcbs;
ICTFBI 0:4edb816d21e1 57
ICTFBI 0:4edb816d21e1 58 /**
ICTFBI 0:4edb816d21e1 59 * Determine if in incoming IP packet is covered by a RAW PCB
ICTFBI 0:4edb816d21e1 60 * and if so, pass it to a user-provided receive callback function.
ICTFBI 0:4edb816d21e1 61 *
ICTFBI 0:4edb816d21e1 62 * Given an incoming IP datagram (as a chain of pbufs) this function
ICTFBI 0:4edb816d21e1 63 * finds a corresponding RAW PCB and calls the corresponding receive
ICTFBI 0:4edb816d21e1 64 * callback function.
ICTFBI 0:4edb816d21e1 65 *
ICTFBI 0:4edb816d21e1 66 * @param p pbuf to be demultiplexed to a RAW PCB.
ICTFBI 0:4edb816d21e1 67 * @param inp network interface on which the datagram was received.
ICTFBI 0:4edb816d21e1 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
ICTFBI 0:4edb816d21e1 69 * callback function. The caller MAY NOT not reference the
ICTFBI 0:4edb816d21e1 70 * packet any longer, and MAY NOT call pbuf_free().
ICTFBI 0:4edb816d21e1 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
ICTFBI 0:4edb816d21e1 72 * caller).
ICTFBI 0:4edb816d21e1 73 *
ICTFBI 0:4edb816d21e1 74 */
ICTFBI 0:4edb816d21e1 75 u8_t
ICTFBI 0:4edb816d21e1 76 raw_input(struct pbuf *p, struct netif *inp)
ICTFBI 0:4edb816d21e1 77 {
ICTFBI 0:4edb816d21e1 78 struct raw_pcb *pcb, *prev;
ICTFBI 0:4edb816d21e1 79 struct ip_hdr *iphdr;
ICTFBI 0:4edb816d21e1 80 s16_t proto;
ICTFBI 0:4edb816d21e1 81 u8_t eaten = 0;
ICTFBI 0:4edb816d21e1 82
ICTFBI 0:4edb816d21e1 83 LWIP_UNUSED_ARG(inp);
ICTFBI 0:4edb816d21e1 84
ICTFBI 0:4edb816d21e1 85 iphdr = (struct ip_hdr *)p->payload;
ICTFBI 0:4edb816d21e1 86 proto = IPH_PROTO(iphdr);
ICTFBI 0:4edb816d21e1 87
ICTFBI 0:4edb816d21e1 88 prev = NULL;
ICTFBI 0:4edb816d21e1 89 pcb = raw_pcbs;
ICTFBI 0:4edb816d21e1 90 /* loop through all raw pcbs until the packet is eaten by one */
ICTFBI 0:4edb816d21e1 91 /* this allows multiple pcbs to match against the packet by design */
ICTFBI 0:4edb816d21e1 92 while ((eaten == 0) && (pcb != NULL)) {
ICTFBI 0:4edb816d21e1 93 if ((pcb->protocol == proto) &&
ICTFBI 0:4edb816d21e1 94 (ip_addr_isany(&pcb->local_ip) ||
ICTFBI 0:4edb816d21e1 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
ICTFBI 0:4edb816d21e1 96 #if IP_SOF_BROADCAST_RECV
ICTFBI 0:4edb816d21e1 97 /* broadcast filter? */
ICTFBI 0:4edb816d21e1 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
ICTFBI 0:4edb816d21e1 99 #endif /* IP_SOF_BROADCAST_RECV */
ICTFBI 0:4edb816d21e1 100 {
ICTFBI 0:4edb816d21e1 101 /* receive callback function available? */
ICTFBI 0:4edb816d21e1 102 if (pcb->recv != NULL) {
ICTFBI 0:4edb816d21e1 103 /* the receive callback function did not eat the packet? */
ICTFBI 0:4edb816d21e1 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
ICTFBI 0:4edb816d21e1 105 /* receive function ate the packet */
ICTFBI 0:4edb816d21e1 106 p = NULL;
ICTFBI 0:4edb816d21e1 107 eaten = 1;
ICTFBI 0:4edb816d21e1 108 if (prev != NULL) {
ICTFBI 0:4edb816d21e1 109 /* move the pcb to the front of raw_pcbs so that is
ICTFBI 0:4edb816d21e1 110 found faster next time */
ICTFBI 0:4edb816d21e1 111 prev->next = pcb->next;
ICTFBI 0:4edb816d21e1 112 pcb->next = raw_pcbs;
ICTFBI 0:4edb816d21e1 113 raw_pcbs = pcb;
ICTFBI 0:4edb816d21e1 114 }
ICTFBI 0:4edb816d21e1 115 }
ICTFBI 0:4edb816d21e1 116 }
ICTFBI 0:4edb816d21e1 117 /* no receive callback function was set for this raw PCB */
ICTFBI 0:4edb816d21e1 118 }
ICTFBI 0:4edb816d21e1 119 /* drop the packet */
ICTFBI 0:4edb816d21e1 120 }
ICTFBI 0:4edb816d21e1 121 prev = pcb;
ICTFBI 0:4edb816d21e1 122 pcb = pcb->next;
ICTFBI 0:4edb816d21e1 123 }
ICTFBI 0:4edb816d21e1 124 return eaten;
ICTFBI 0:4edb816d21e1 125 }
ICTFBI 0:4edb816d21e1 126
ICTFBI 0:4edb816d21e1 127 /**
ICTFBI 0:4edb816d21e1 128 * Bind a RAW PCB.
ICTFBI 0:4edb816d21e1 129 *
ICTFBI 0:4edb816d21e1 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
ICTFBI 0:4edb816d21e1 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
ICTFBI 0:4edb816d21e1 132 * bind to all local interfaces.
ICTFBI 0:4edb816d21e1 133 *
ICTFBI 0:4edb816d21e1 134 * @return lwIP error code.
ICTFBI 0:4edb816d21e1 135 * - ERR_OK. Successful. No error occured.
ICTFBI 0:4edb816d21e1 136 * - ERR_USE. The specified IP address is already bound to by
ICTFBI 0:4edb816d21e1 137 * another RAW PCB.
ICTFBI 0:4edb816d21e1 138 *
ICTFBI 0:4edb816d21e1 139 * @see raw_disconnect()
ICTFBI 0:4edb816d21e1 140 */
ICTFBI 0:4edb816d21e1 141 err_t
ICTFBI 0:4edb816d21e1 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
ICTFBI 0:4edb816d21e1 143 {
ICTFBI 0:4edb816d21e1 144 ip_addr_set(&pcb->local_ip, ipaddr);
ICTFBI 0:4edb816d21e1 145 return ERR_OK;
ICTFBI 0:4edb816d21e1 146 }
ICTFBI 0:4edb816d21e1 147
ICTFBI 0:4edb816d21e1 148 /**
ICTFBI 0:4edb816d21e1 149 * Connect an RAW PCB. This function is required by upper layers
ICTFBI 0:4edb816d21e1 150 * of lwip. Using the raw api you could use raw_sendto() instead
ICTFBI 0:4edb816d21e1 151 *
ICTFBI 0:4edb816d21e1 152 * This will associate the RAW PCB with the remote address.
ICTFBI 0:4edb816d21e1 153 *
ICTFBI 0:4edb816d21e1 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
ICTFBI 0:4edb816d21e1 155 * @param ipaddr remote IP address to connect with.
ICTFBI 0:4edb816d21e1 156 *
ICTFBI 0:4edb816d21e1 157 * @return lwIP error code
ICTFBI 0:4edb816d21e1 158 *
ICTFBI 0:4edb816d21e1 159 * @see raw_disconnect() and raw_sendto()
ICTFBI 0:4edb816d21e1 160 */
ICTFBI 0:4edb816d21e1 161 err_t
ICTFBI 0:4edb816d21e1 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
ICTFBI 0:4edb816d21e1 163 {
ICTFBI 0:4edb816d21e1 164 ip_addr_set(&pcb->remote_ip, ipaddr);
ICTFBI 0:4edb816d21e1 165 return ERR_OK;
ICTFBI 0:4edb816d21e1 166 }
ICTFBI 0:4edb816d21e1 167
ICTFBI 0:4edb816d21e1 168
ICTFBI 0:4edb816d21e1 169 /**
ICTFBI 0:4edb816d21e1 170 * Set the callback function for received packets that match the
ICTFBI 0:4edb816d21e1 171 * raw PCB's protocol and binding.
ICTFBI 0:4edb816d21e1 172 *
ICTFBI 0:4edb816d21e1 173 * The callback function MUST either
ICTFBI 0:4edb816d21e1 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
ICTFBI 0:4edb816d21e1 175 * packet will not be passed to other raw PCBs or other protocol layers.
ICTFBI 0:4edb816d21e1 176 * - not free the packet, and return zero. The packet will be matched
ICTFBI 0:4edb816d21e1 177 * against further PCBs and/or forwarded to another protocol layers.
ICTFBI 0:4edb816d21e1 178 *
ICTFBI 0:4edb816d21e1 179 * @return non-zero if the packet was free()d, zero if the packet remains
ICTFBI 0:4edb816d21e1 180 * available for others.
ICTFBI 0:4edb816d21e1 181 */
ICTFBI 0:4edb816d21e1 182 void
ICTFBI 0:4edb816d21e1 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
ICTFBI 0:4edb816d21e1 184 {
ICTFBI 0:4edb816d21e1 185 /* remember recv() callback and user data */
ICTFBI 0:4edb816d21e1 186 pcb->recv = recv;
ICTFBI 0:4edb816d21e1 187 pcb->recv_arg = recv_arg;
ICTFBI 0:4edb816d21e1 188 }
ICTFBI 0:4edb816d21e1 189
ICTFBI 0:4edb816d21e1 190 /**
ICTFBI 0:4edb816d21e1 191 * Send the raw IP packet to the given address. Note that actually you cannot
ICTFBI 0:4edb816d21e1 192 * modify the IP headers (this is inconsistent with the receive callback where
ICTFBI 0:4edb816d21e1 193 * you actually get the IP headers), you can only specify the IP payload here.
ICTFBI 0:4edb816d21e1 194 * It requires some more changes in lwIP. (there will be a raw_send() function
ICTFBI 0:4edb816d21e1 195 * then.)
ICTFBI 0:4edb816d21e1 196 *
ICTFBI 0:4edb816d21e1 197 * @param pcb the raw pcb which to send
ICTFBI 0:4edb816d21e1 198 * @param p the IP payload to send
ICTFBI 0:4edb816d21e1 199 * @param ipaddr the destination address of the IP packet
ICTFBI 0:4edb816d21e1 200 *
ICTFBI 0:4edb816d21e1 201 */
ICTFBI 0:4edb816d21e1 202 err_t
ICTFBI 0:4edb816d21e1 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
ICTFBI 0:4edb816d21e1 204 {
ICTFBI 0:4edb816d21e1 205 err_t err;
ICTFBI 0:4edb816d21e1 206 struct netif *netif;
ICTFBI 0:4edb816d21e1 207 ip_addr_t *src_ip;
ICTFBI 0:4edb816d21e1 208 struct pbuf *q; /* q will be sent down the stack */
ICTFBI 0:4edb816d21e1 209
ICTFBI 0:4edb816d21e1 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
ICTFBI 0:4edb816d21e1 211
ICTFBI 0:4edb816d21e1 212 /* not enough space to add an IP header to first pbuf in given p chain? */
ICTFBI 0:4edb816d21e1 213 if (pbuf_header(p, IP_HLEN)) {
ICTFBI 0:4edb816d21e1 214 /* allocate header in new pbuf */
ICTFBI 0:4edb816d21e1 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
ICTFBI 0:4edb816d21e1 216 /* new header pbuf could not be allocated? */
ICTFBI 0:4edb816d21e1 217 if (q == NULL) {
ICTFBI 0:4edb816d21e1 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
ICTFBI 0:4edb816d21e1 219 return ERR_MEM;
ICTFBI 0:4edb816d21e1 220 }
ICTFBI 0:4edb816d21e1 221 /* chain header q in front of given pbuf p */
ICTFBI 0:4edb816d21e1 222 pbuf_chain(q, p);
ICTFBI 0:4edb816d21e1 223 /* { first pbuf q points to header pbuf } */
ICTFBI 0:4edb816d21e1 224 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
ICTFBI 0:4edb816d21e1 225 } else {
ICTFBI 0:4edb816d21e1 226 /* first pbuf q equals given pbuf */
ICTFBI 0:4edb816d21e1 227 q = p;
ICTFBI 0:4edb816d21e1 228 if(pbuf_header(q, -IP_HLEN)) {
ICTFBI 0:4edb816d21e1 229 LWIP_ASSERT("Can't restore header we just removed!", 0);
ICTFBI 0:4edb816d21e1 230 return ERR_MEM;
ICTFBI 0:4edb816d21e1 231 }
ICTFBI 0:4edb816d21e1 232 }
ICTFBI 0:4edb816d21e1 233
ICTFBI 0:4edb816d21e1 234 if ((netif = ip_route(ipaddr)) == NULL) {
ICTFBI 0:4edb816d21e1 235 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ICTFBI 0:4edb816d21e1 236 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
ICTFBI 0:4edb816d21e1 237 /* free any temporary header pbuf allocated by pbuf_header() */
ICTFBI 0:4edb816d21e1 238 if (q != p) {
ICTFBI 0:4edb816d21e1 239 pbuf_free(q);
ICTFBI 0:4edb816d21e1 240 }
ICTFBI 0:4edb816d21e1 241 return ERR_RTE;
ICTFBI 0:4edb816d21e1 242 }
ICTFBI 0:4edb816d21e1 243
ICTFBI 0:4edb816d21e1 244 #if IP_SOF_BROADCAST
ICTFBI 0:4edb816d21e1 245 /* broadcast filter? */
ICTFBI 0:4edb816d21e1 246 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
ICTFBI 0:4edb816d21e1 247 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
ICTFBI 0:4edb816d21e1 248 /* free any temporary header pbuf allocated by pbuf_header() */
ICTFBI 0:4edb816d21e1 249 if (q != p) {
ICTFBI 0:4edb816d21e1 250 pbuf_free(q);
ICTFBI 0:4edb816d21e1 251 }
ICTFBI 0:4edb816d21e1 252 return ERR_VAL;
ICTFBI 0:4edb816d21e1 253 }
ICTFBI 0:4edb816d21e1 254 #endif /* IP_SOF_BROADCAST */
ICTFBI 0:4edb816d21e1 255
ICTFBI 0:4edb816d21e1 256 if (ip_addr_isany(&pcb->local_ip)) {
ICTFBI 0:4edb816d21e1 257 /* use outgoing network interface IP address as source address */
ICTFBI 0:4edb816d21e1 258 src_ip = &(netif->ip_addr);
ICTFBI 0:4edb816d21e1 259 } else {
ICTFBI 0:4edb816d21e1 260 /* use RAW PCB local IP address as source address */
ICTFBI 0:4edb816d21e1 261 src_ip = &(pcb->local_ip);
ICTFBI 0:4edb816d21e1 262 }
ICTFBI 0:4edb816d21e1 263
ICTFBI 0:4edb816d21e1 264 #if LWIP_NETIF_HWADDRHINT
ICTFBI 0:4edb816d21e1 265 netif->addr_hint = &(pcb->addr_hint);
ICTFBI 0:4edb816d21e1 266 #endif /* LWIP_NETIF_HWADDRHINT*/
ICTFBI 0:4edb816d21e1 267 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
ICTFBI 0:4edb816d21e1 268 #if LWIP_NETIF_HWADDRHINT
ICTFBI 0:4edb816d21e1 269 netif->addr_hint = NULL;
ICTFBI 0:4edb816d21e1 270 #endif /* LWIP_NETIF_HWADDRHINT*/
ICTFBI 0:4edb816d21e1 271
ICTFBI 0:4edb816d21e1 272 /* did we chain a header earlier? */
ICTFBI 0:4edb816d21e1 273 if (q != p) {
ICTFBI 0:4edb816d21e1 274 /* free the header */
ICTFBI 0:4edb816d21e1 275 pbuf_free(q);
ICTFBI 0:4edb816d21e1 276 }
ICTFBI 0:4edb816d21e1 277 return err;
ICTFBI 0:4edb816d21e1 278 }
ICTFBI 0:4edb816d21e1 279
ICTFBI 0:4edb816d21e1 280 /**
ICTFBI 0:4edb816d21e1 281 * Send the raw IP packet to the address given by raw_connect()
ICTFBI 0:4edb816d21e1 282 *
ICTFBI 0:4edb816d21e1 283 * @param pcb the raw pcb which to send
ICTFBI 0:4edb816d21e1 284 * @param p the IP payload to send
ICTFBI 0:4edb816d21e1 285 *
ICTFBI 0:4edb816d21e1 286 */
ICTFBI 0:4edb816d21e1 287 err_t
ICTFBI 0:4edb816d21e1 288 raw_send(struct raw_pcb *pcb, struct pbuf *p)
ICTFBI 0:4edb816d21e1 289 {
ICTFBI 0:4edb816d21e1 290 return raw_sendto(pcb, p, &pcb->remote_ip);
ICTFBI 0:4edb816d21e1 291 }
ICTFBI 0:4edb816d21e1 292
ICTFBI 0:4edb816d21e1 293 /**
ICTFBI 0:4edb816d21e1 294 * Remove an RAW PCB.
ICTFBI 0:4edb816d21e1 295 *
ICTFBI 0:4edb816d21e1 296 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
ICTFBI 0:4edb816d21e1 297 * RAW PCB's and the data structure is freed from memory.
ICTFBI 0:4edb816d21e1 298 *
ICTFBI 0:4edb816d21e1 299 * @see raw_new()
ICTFBI 0:4edb816d21e1 300 */
ICTFBI 0:4edb816d21e1 301 void
ICTFBI 0:4edb816d21e1 302 raw_remove(struct raw_pcb *pcb)
ICTFBI 0:4edb816d21e1 303 {
ICTFBI 0:4edb816d21e1 304 struct raw_pcb *pcb2;
ICTFBI 0:4edb816d21e1 305 /* pcb to be removed is first in list? */
ICTFBI 0:4edb816d21e1 306 if (raw_pcbs == pcb) {
ICTFBI 0:4edb816d21e1 307 /* make list start at 2nd pcb */
ICTFBI 0:4edb816d21e1 308 raw_pcbs = raw_pcbs->next;
ICTFBI 0:4edb816d21e1 309 /* pcb not 1st in list */
ICTFBI 0:4edb816d21e1 310 } else {
ICTFBI 0:4edb816d21e1 311 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
ICTFBI 0:4edb816d21e1 312 /* find pcb in raw_pcbs list */
ICTFBI 0:4edb816d21e1 313 if (pcb2->next != NULL && pcb2->next == pcb) {
ICTFBI 0:4edb816d21e1 314 /* remove pcb from list */
ICTFBI 0:4edb816d21e1 315 pcb2->next = pcb->next;
ICTFBI 0:4edb816d21e1 316 }
ICTFBI 0:4edb816d21e1 317 }
ICTFBI 0:4edb816d21e1 318 }
ICTFBI 0:4edb816d21e1 319 memp_free(MEMP_RAW_PCB, pcb);
ICTFBI 0:4edb816d21e1 320 }
ICTFBI 0:4edb816d21e1 321
ICTFBI 0:4edb816d21e1 322 /**
ICTFBI 0:4edb816d21e1 323 * Create a RAW PCB.
ICTFBI 0:4edb816d21e1 324 *
ICTFBI 0:4edb816d21e1 325 * @return The RAW PCB which was created. NULL if the PCB data structure
ICTFBI 0:4edb816d21e1 326 * could not be allocated.
ICTFBI 0:4edb816d21e1 327 *
ICTFBI 0:4edb816d21e1 328 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
ICTFBI 0:4edb816d21e1 329 *
ICTFBI 0:4edb816d21e1 330 * @see raw_remove()
ICTFBI 0:4edb816d21e1 331 */
ICTFBI 0:4edb816d21e1 332 struct raw_pcb *
ICTFBI 0:4edb816d21e1 333 raw_new(u8_t proto)
ICTFBI 0:4edb816d21e1 334 {
ICTFBI 0:4edb816d21e1 335 struct raw_pcb *pcb;
ICTFBI 0:4edb816d21e1 336
ICTFBI 0:4edb816d21e1 337 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
ICTFBI 0:4edb816d21e1 338
ICTFBI 0:4edb816d21e1 339 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
ICTFBI 0:4edb816d21e1 340 /* could allocate RAW PCB? */
ICTFBI 0:4edb816d21e1 341 if (pcb != NULL) {
ICTFBI 0:4edb816d21e1 342 /* initialize PCB to all zeroes */
ICTFBI 0:4edb816d21e1 343 memset(pcb, 0, sizeof(struct raw_pcb));
ICTFBI 0:4edb816d21e1 344 pcb->protocol = proto;
ICTFBI 0:4edb816d21e1 345 pcb->ttl = RAW_TTL;
ICTFBI 0:4edb816d21e1 346 pcb->next = raw_pcbs;
ICTFBI 0:4edb816d21e1 347 raw_pcbs = pcb;
ICTFBI 0:4edb816d21e1 348 }
ICTFBI 0:4edb816d21e1 349 return pcb;
ICTFBI 0:4edb816d21e1 350 }
ICTFBI 0:4edb816d21e1 351
ICTFBI 0:4edb816d21e1 352 #endif /* LWIP_RAW */