Richard Blimmel / Mbed 2 deprecated CIG_HTTPClient

HTTPClient using static IP

Dependencies:   mbed

NetServices/lwip/core/raw.c@0:d8f2f7d5f31b, 2011-05-30 (annotated)

Committer:
mr_q
Date:
Mon May 30 11:53:37 2011 +0000
Revision:
0:d8f2f7d5f31b
v0.01 Draft

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mr_q 0:d8f2f7d5f31b 1 /**
mr_q 0:d8f2f7d5f31b 2 * @file
mr_q 0:d8f2f7d5f31b 3 * Implementation of raw protocol PCBs for low-level handling of
mr_q 0:d8f2f7d5f31b 4 * different types of protocols besides (or overriding) those
mr_q 0:d8f2f7d5f31b 5 * already available in lwIP.
mr_q 0:d8f2f7d5f31b 6 *
mr_q 0:d8f2f7d5f31b 7 */
mr_q 0:d8f2f7d5f31b 8
mr_q 0:d8f2f7d5f31b 9 /*
mr_q 0:d8f2f7d5f31b 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mr_q 0:d8f2f7d5f31b 11 * All rights reserved.
mr_q 0:d8f2f7d5f31b 12 *
mr_q 0:d8f2f7d5f31b 13 * Redistribution and use in source and binary forms, with or without modification,
mr_q 0:d8f2f7d5f31b 14 * are permitted provided that the following conditions are met:
mr_q 0:d8f2f7d5f31b 15 *
mr_q 0:d8f2f7d5f31b 16 * 1. Redistributions of source code must retain the above copyright notice,
mr_q 0:d8f2f7d5f31b 17 * this list of conditions and the following disclaimer.
mr_q 0:d8f2f7d5f31b 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mr_q 0:d8f2f7d5f31b 19 * this list of conditions and the following disclaimer in the documentation
mr_q 0:d8f2f7d5f31b 20 * and/or other materials provided with the distribution.
mr_q 0:d8f2f7d5f31b 21 * 3. The name of the author may not be used to endorse or promote products
mr_q 0:d8f2f7d5f31b 22 * derived from this software without specific prior written permission.
mr_q 0:d8f2f7d5f31b 23 *
mr_q 0:d8f2f7d5f31b 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mr_q 0:d8f2f7d5f31b 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mr_q 0:d8f2f7d5f31b 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mr_q 0:d8f2f7d5f31b 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mr_q 0:d8f2f7d5f31b 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mr_q 0:d8f2f7d5f31b 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mr_q 0:d8f2f7d5f31b 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mr_q 0:d8f2f7d5f31b 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mr_q 0:d8f2f7d5f31b 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mr_q 0:d8f2f7d5f31b 33 * OF SUCH DAMAGE.
mr_q 0:d8f2f7d5f31b 34 *
mr_q 0:d8f2f7d5f31b 35 * This file is part of the lwIP TCP/IP stack.
mr_q 0:d8f2f7d5f31b 36 *
mr_q 0:d8f2f7d5f31b 37 * Author: Adam Dunkels <adam@sics.se>
mr_q 0:d8f2f7d5f31b 38 *
mr_q 0:d8f2f7d5f31b 39 */
mr_q 0:d8f2f7d5f31b 40
mr_q 0:d8f2f7d5f31b 41 #include "lwip/opt.h"
mr_q 0:d8f2f7d5f31b 42
mr_q 0:d8f2f7d5f31b 43 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
mr_q 0:d8f2f7d5f31b 44
mr_q 0:d8f2f7d5f31b 45 #include "lwip/def.h"
mr_q 0:d8f2f7d5f31b 46 #include "lwip/memp.h"
mr_q 0:d8f2f7d5f31b 47 #include "lwip/ip_addr.h"
mr_q 0:d8f2f7d5f31b 48 #include "lwip/netif.h"
mr_q 0:d8f2f7d5f31b 49 #include "lwip/raw.h"
mr_q 0:d8f2f7d5f31b 50 #include "lwip/stats.h"
mr_q 0:d8f2f7d5f31b 51 #include "arch/perf.h"
mr_q 0:d8f2f7d5f31b 52
mr_q 0:d8f2f7d5f31b 53 #include <string.h>
mr_q 0:d8f2f7d5f31b 54
mr_q 0:d8f2f7d5f31b 55 /** The list of RAW PCBs */
mr_q 0:d8f2f7d5f31b 56 static struct raw_pcb *raw_pcbs;
mr_q 0:d8f2f7d5f31b 57
mr_q 0:d8f2f7d5f31b 58 /**
mr_q 0:d8f2f7d5f31b 59 * Determine if in incoming IP packet is covered by a RAW PCB
mr_q 0:d8f2f7d5f31b 60 * and if so, pass it to a user-provided receive callback function.
mr_q 0:d8f2f7d5f31b 61 *
mr_q 0:d8f2f7d5f31b 62 * Given an incoming IP datagram (as a chain of pbufs) this function
mr_q 0:d8f2f7d5f31b 63 * finds a corresponding RAW PCB and calls the corresponding receive
mr_q 0:d8f2f7d5f31b 64 * callback function.
mr_q 0:d8f2f7d5f31b 65 *
mr_q 0:d8f2f7d5f31b 66 * @param p pbuf to be demultiplexed to a RAW PCB.
mr_q 0:d8f2f7d5f31b 67 * @param inp network interface on which the datagram was received.
mr_q 0:d8f2f7d5f31b 68 * @return - 1 if the packet has been eaten by a RAW PCB receive
mr_q 0:d8f2f7d5f31b 69 * callback function. The caller MAY NOT not reference the
mr_q 0:d8f2f7d5f31b 70 * packet any longer, and MAY NOT call pbuf_free().
mr_q 0:d8f2f7d5f31b 71 * @return - 0 if packet is not eaten (pbuf is still referenced by the
mr_q 0:d8f2f7d5f31b 72 * caller).
mr_q 0:d8f2f7d5f31b 73 *
mr_q 0:d8f2f7d5f31b 74 */
mr_q 0:d8f2f7d5f31b 75 u8_t
mr_q 0:d8f2f7d5f31b 76 raw_input(struct pbuf *p, struct netif *inp)
mr_q 0:d8f2f7d5f31b 77 {
mr_q 0:d8f2f7d5f31b 78 struct raw_pcb *pcb, *prev;
mr_q 0:d8f2f7d5f31b 79 struct ip_hdr *iphdr;
mr_q 0:d8f2f7d5f31b 80 s16_t proto;
mr_q 0:d8f2f7d5f31b 81 u8_t eaten = 0;
mr_q 0:d8f2f7d5f31b 82
mr_q 0:d8f2f7d5f31b 83 LWIP_UNUSED_ARG(inp);
mr_q 0:d8f2f7d5f31b 84
mr_q 0:d8f2f7d5f31b 85 iphdr = (struct ip_hdr *)p->payload;
mr_q 0:d8f2f7d5f31b 86 proto = IPH_PROTO(iphdr);
mr_q 0:d8f2f7d5f31b 87
mr_q 0:d8f2f7d5f31b 88 prev = NULL;
mr_q 0:d8f2f7d5f31b 89 pcb = raw_pcbs;
mr_q 0:d8f2f7d5f31b 90 /* loop through all raw pcbs until the packet is eaten by one */
mr_q 0:d8f2f7d5f31b 91 /* this allows multiple pcbs to match against the packet by design */
mr_q 0:d8f2f7d5f31b 92 while ((eaten == 0) && (pcb != NULL)) {
mr_q 0:d8f2f7d5f31b 93 if ((pcb->protocol == proto) &&
mr_q 0:d8f2f7d5f31b 94 (ip_addr_isany(&pcb->local_ip) ||
mr_q 0:d8f2f7d5f31b 95 ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
mr_q 0:d8f2f7d5f31b 96 #if IP_SOF_BROADCAST_RECV
mr_q 0:d8f2f7d5f31b 97 /* broadcast filter? */
mr_q 0:d8f2f7d5f31b 98 if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&current_iphdr_dest, inp))
mr_q 0:d8f2f7d5f31b 99 #endif /* IP_SOF_BROADCAST_RECV */
mr_q 0:d8f2f7d5f31b 100 {
mr_q 0:d8f2f7d5f31b 101 /* receive callback function available? */
mr_q 0:d8f2f7d5f31b 102 if (pcb->recv != NULL) {
mr_q 0:d8f2f7d5f31b 103 /* the receive callback function did not eat the packet? */
mr_q 0:d8f2f7d5f31b 104 if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
mr_q 0:d8f2f7d5f31b 105 /* receive function ate the packet */
mr_q 0:d8f2f7d5f31b 106 p = NULL;
mr_q 0:d8f2f7d5f31b 107 eaten = 1;
mr_q 0:d8f2f7d5f31b 108 if (prev != NULL) {
mr_q 0:d8f2f7d5f31b 109 /* move the pcb to the front of raw_pcbs so that is
mr_q 0:d8f2f7d5f31b 110 found faster next time */
mr_q 0:d8f2f7d5f31b 111 prev->next = pcb->next;
mr_q 0:d8f2f7d5f31b 112 pcb->next = raw_pcbs;
mr_q 0:d8f2f7d5f31b 113 raw_pcbs = pcb;
mr_q 0:d8f2f7d5f31b 114 }
mr_q 0:d8f2f7d5f31b 115 }
mr_q 0:d8f2f7d5f31b 116 }
mr_q 0:d8f2f7d5f31b 117 /* no receive callback function was set for this raw PCB */
mr_q 0:d8f2f7d5f31b 118 }
mr_q 0:d8f2f7d5f31b 119 /* drop the packet */
mr_q 0:d8f2f7d5f31b 120 }
mr_q 0:d8f2f7d5f31b 121 prev = pcb;
mr_q 0:d8f2f7d5f31b 122 pcb = pcb->next;
mr_q 0:d8f2f7d5f31b 123 }
mr_q 0:d8f2f7d5f31b 124 return eaten;
mr_q 0:d8f2f7d5f31b 125 }
mr_q 0:d8f2f7d5f31b 126
mr_q 0:d8f2f7d5f31b 127 /**
mr_q 0:d8f2f7d5f31b 128 * Bind a RAW PCB.
mr_q 0:d8f2f7d5f31b 129 *
mr_q 0:d8f2f7d5f31b 130 * @param pcb RAW PCB to be bound with a local address ipaddr.
mr_q 0:d8f2f7d5f31b 131 * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
mr_q 0:d8f2f7d5f31b 132 * bind to all local interfaces.
mr_q 0:d8f2f7d5f31b 133 *
mr_q 0:d8f2f7d5f31b 134 * @return lwIP error code.
mr_q 0:d8f2f7d5f31b 135 * - ERR_OK. Successful. No error occured.
mr_q 0:d8f2f7d5f31b 136 * - ERR_USE. The specified IP address is already bound to by
mr_q 0:d8f2f7d5f31b 137 * another RAW PCB.
mr_q 0:d8f2f7d5f31b 138 *
mr_q 0:d8f2f7d5f31b 139 * @see raw_disconnect()
mr_q 0:d8f2f7d5f31b 140 */
mr_q 0:d8f2f7d5f31b 141 err_t
mr_q 0:d8f2f7d5f31b 142 raw_bind(struct raw_pcb *pcb, ip_addr_t *ipaddr)
mr_q 0:d8f2f7d5f31b 143 {
mr_q 0:d8f2f7d5f31b 144 ip_addr_set(&pcb->local_ip, ipaddr);
mr_q 0:d8f2f7d5f31b 145 return ERR_OK;
mr_q 0:d8f2f7d5f31b 146 }
mr_q 0:d8f2f7d5f31b 147
mr_q 0:d8f2f7d5f31b 148 /**
mr_q 0:d8f2f7d5f31b 149 * Connect an RAW PCB. This function is required by upper layers
mr_q 0:d8f2f7d5f31b 150 * of lwip. Using the raw api you could use raw_sendto() instead
mr_q 0:d8f2f7d5f31b 151 *
mr_q 0:d8f2f7d5f31b 152 * This will associate the RAW PCB with the remote address.
mr_q 0:d8f2f7d5f31b 153 *
mr_q 0:d8f2f7d5f31b 154 * @param pcb RAW PCB to be connected with remote address ipaddr and port.
mr_q 0:d8f2f7d5f31b 155 * @param ipaddr remote IP address to connect with.
mr_q 0:d8f2f7d5f31b 156 *
mr_q 0:d8f2f7d5f31b 157 * @return lwIP error code
mr_q 0:d8f2f7d5f31b 158 *
mr_q 0:d8f2f7d5f31b 159 * @see raw_disconnect() and raw_sendto()
mr_q 0:d8f2f7d5f31b 160 */
mr_q 0:d8f2f7d5f31b 161 err_t
mr_q 0:d8f2f7d5f31b 162 raw_connect(struct raw_pcb *pcb, ip_addr_t *ipaddr)
mr_q 0:d8f2f7d5f31b 163 {
mr_q 0:d8f2f7d5f31b 164 ip_addr_set(&pcb->remote_ip, ipaddr);
mr_q 0:d8f2f7d5f31b 165 return ERR_OK;
mr_q 0:d8f2f7d5f31b 166 }
mr_q 0:d8f2f7d5f31b 167
mr_q 0:d8f2f7d5f31b 168
mr_q 0:d8f2f7d5f31b 169 /**
mr_q 0:d8f2f7d5f31b 170 * Set the callback function for received packets that match the
mr_q 0:d8f2f7d5f31b 171 * raw PCB's protocol and binding.
mr_q 0:d8f2f7d5f31b 172 *
mr_q 0:d8f2f7d5f31b 173 * The callback function MUST either
mr_q 0:d8f2f7d5f31b 174 * - eat the packet by calling pbuf_free() and returning non-zero. The
mr_q 0:d8f2f7d5f31b 175 * packet will not be passed to other raw PCBs or other protocol layers.
mr_q 0:d8f2f7d5f31b 176 * - not free the packet, and return zero. The packet will be matched
mr_q 0:d8f2f7d5f31b 177 * against further PCBs and/or forwarded to another protocol layers.
mr_q 0:d8f2f7d5f31b 178 *
mr_q 0:d8f2f7d5f31b 179 * @return non-zero if the packet was free()d, zero if the packet remains
mr_q 0:d8f2f7d5f31b 180 * available for others.
mr_q 0:d8f2f7d5f31b 181 */
mr_q 0:d8f2f7d5f31b 182 void
mr_q 0:d8f2f7d5f31b 183 raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
mr_q 0:d8f2f7d5f31b 184 {
mr_q 0:d8f2f7d5f31b 185 /* remember recv() callback and user data */
mr_q 0:d8f2f7d5f31b 186 pcb->recv = recv;
mr_q 0:d8f2f7d5f31b 187 pcb->recv_arg = recv_arg;
mr_q 0:d8f2f7d5f31b 188 }
mr_q 0:d8f2f7d5f31b 189
mr_q 0:d8f2f7d5f31b 190 /**
mr_q 0:d8f2f7d5f31b 191 * Send the raw IP packet to the given address. Note that actually you cannot
mr_q 0:d8f2f7d5f31b 192 * modify the IP headers (this is inconsistent with the receive callback where
mr_q 0:d8f2f7d5f31b 193 * you actually get the IP headers), you can only specify the IP payload here.
mr_q 0:d8f2f7d5f31b 194 * It requires some more changes in lwIP. (there will be a raw_send() function
mr_q 0:d8f2f7d5f31b 195 * then.)
mr_q 0:d8f2f7d5f31b 196 *
mr_q 0:d8f2f7d5f31b 197 * @param pcb the raw pcb which to send
mr_q 0:d8f2f7d5f31b 198 * @param p the IP payload to send
mr_q 0:d8f2f7d5f31b 199 * @param ipaddr the destination address of the IP packet
mr_q 0:d8f2f7d5f31b 200 *
mr_q 0:d8f2f7d5f31b 201 */
mr_q 0:d8f2f7d5f31b 202 err_t
mr_q 0:d8f2f7d5f31b 203 raw_sendto(struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *ipaddr)
mr_q 0:d8f2f7d5f31b 204 {
mr_q 0:d8f2f7d5f31b 205 err_t err;
mr_q 0:d8f2f7d5f31b 206 struct netif *netif;
mr_q 0:d8f2f7d5f31b 207 ip_addr_t *src_ip;
mr_q 0:d8f2f7d5f31b 208 struct pbuf *q; /* q will be sent down the stack */
mr_q 0:d8f2f7d5f31b 209
mr_q 0:d8f2f7d5f31b 210 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
mr_q 0:d8f2f7d5f31b 211
mr_q 0:d8f2f7d5f31b 212 /* not enough space to add an IP header to first pbuf in given p chain? */
mr_q 0:d8f2f7d5f31b 213 if (pbuf_header(p, IP_HLEN)) {
mr_q 0:d8f2f7d5f31b 214 /* allocate header in new pbuf */
mr_q 0:d8f2f7d5f31b 215 q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
mr_q 0:d8f2f7d5f31b 216 /* new header pbuf could not be allocated? */
mr_q 0:d8f2f7d5f31b 217 if (q == NULL) {
mr_q 0:d8f2f7d5f31b 218 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
mr_q 0:d8f2f7d5f31b 219 return ERR_MEM;
mr_q 0:d8f2f7d5f31b 220 }
mr_q 0:d8f2f7d5f31b 221 /* chain header q in front of given pbuf p */
mr_q 0:d8f2f7d5f31b 222 pbuf_chain(q, p);
mr_q 0:d8f2f7d5f31b 223 /* { first pbuf q points to header pbuf } */
mr_q 0:d8f2f7d5f31b 224 LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
mr_q 0:d8f2f7d5f31b 225 } else {
mr_q 0:d8f2f7d5f31b 226 /* first pbuf q equals given pbuf */
mr_q 0:d8f2f7d5f31b 227 q = p;
mr_q 0:d8f2f7d5f31b 228 if(pbuf_header(q, -IP_HLEN)) {
mr_q 0:d8f2f7d5f31b 229 LWIP_ASSERT("Can't restore header we just removed!", 0);
mr_q 0:d8f2f7d5f31b 230 return ERR_MEM;
mr_q 0:d8f2f7d5f31b 231 }
mr_q 0:d8f2f7d5f31b 232 }
mr_q 0:d8f2f7d5f31b 233
mr_q 0:d8f2f7d5f31b 234 if ((netif = ip_route(ipaddr)) == NULL) {
mr_q 0:d8f2f7d5f31b 235 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
mr_q 0:d8f2f7d5f31b 236 ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
mr_q 0:d8f2f7d5f31b 237 /* free any temporary header pbuf allocated by pbuf_header() */
mr_q 0:d8f2f7d5f31b 238 if (q != p) {
mr_q 0:d8f2f7d5f31b 239 pbuf_free(q);
mr_q 0:d8f2f7d5f31b 240 }
mr_q 0:d8f2f7d5f31b 241 return ERR_RTE;
mr_q 0:d8f2f7d5f31b 242 }
mr_q 0:d8f2f7d5f31b 243
mr_q 0:d8f2f7d5f31b 244 #if IP_SOF_BROADCAST
mr_q 0:d8f2f7d5f31b 245 /* broadcast filter? */
mr_q 0:d8f2f7d5f31b 246 if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
mr_q 0:d8f2f7d5f31b 247 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
mr_q 0:d8f2f7d5f31b 248 /* free any temporary header pbuf allocated by pbuf_header() */
mr_q 0:d8f2f7d5f31b 249 if (q != p) {
mr_q 0:d8f2f7d5f31b 250 pbuf_free(q);
mr_q 0:d8f2f7d5f31b 251 }
mr_q 0:d8f2f7d5f31b 252 return ERR_VAL;
mr_q 0:d8f2f7d5f31b 253 }
mr_q 0:d8f2f7d5f31b 254 #endif /* IP_SOF_BROADCAST */
mr_q 0:d8f2f7d5f31b 255
mr_q 0:d8f2f7d5f31b 256 if (ip_addr_isany(&pcb->local_ip)) {
mr_q 0:d8f2f7d5f31b 257 /* use outgoing network interface IP address as source address */
mr_q 0:d8f2f7d5f31b 258 src_ip = &(netif->ip_addr);
mr_q 0:d8f2f7d5f31b 259 } else {
mr_q 0:d8f2f7d5f31b 260 /* use RAW PCB local IP address as source address */
mr_q 0:d8f2f7d5f31b 261 src_ip = &(pcb->local_ip);
mr_q 0:d8f2f7d5f31b 262 }
mr_q 0:d8f2f7d5f31b 263
mr_q 0:d8f2f7d5f31b 264 #if LWIP_NETIF_HWADDRHINT
mr_q 0:d8f2f7d5f31b 265 netif->addr_hint = &(pcb->addr_hint);
mr_q 0:d8f2f7d5f31b 266 #endif /* LWIP_NETIF_HWADDRHINT*/
mr_q 0:d8f2f7d5f31b 267 err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
mr_q 0:d8f2f7d5f31b 268 #if LWIP_NETIF_HWADDRHINT
mr_q 0:d8f2f7d5f31b 269 netif->addr_hint = NULL;
mr_q 0:d8f2f7d5f31b 270 #endif /* LWIP_NETIF_HWADDRHINT*/
mr_q 0:d8f2f7d5f31b 271
mr_q 0:d8f2f7d5f31b 272 /* did we chain a header earlier? */
mr_q 0:d8f2f7d5f31b 273 if (q != p) {
mr_q 0:d8f2f7d5f31b 274 /* free the header */
mr_q 0:d8f2f7d5f31b 275 pbuf_free(q);
mr_q 0:d8f2f7d5f31b 276 }
mr_q 0:d8f2f7d5f31b 277 return err;
mr_q 0:d8f2f7d5f31b 278 }
mr_q 0:d8f2f7d5f31b 279
mr_q 0:d8f2f7d5f31b 280 /**
mr_q 0:d8f2f7d5f31b 281 * Send the raw IP packet to the address given by raw_connect()
mr_q 0:d8f2f7d5f31b 282 *
mr_q 0:d8f2f7d5f31b 283 * @param pcb the raw pcb which to send
mr_q 0:d8f2f7d5f31b 284 * @param p the IP payload to send
mr_q 0:d8f2f7d5f31b 285 *
mr_q 0:d8f2f7d5f31b 286 */
mr_q 0:d8f2f7d5f31b 287 err_t
mr_q 0:d8f2f7d5f31b 288 raw_send(struct raw_pcb *pcb, struct pbuf *p)
mr_q 0:d8f2f7d5f31b 289 {
mr_q 0:d8f2f7d5f31b 290 return raw_sendto(pcb, p, &pcb->remote_ip);
mr_q 0:d8f2f7d5f31b 291 }
mr_q 0:d8f2f7d5f31b 292
mr_q 0:d8f2f7d5f31b 293 /**
mr_q 0:d8f2f7d5f31b 294 * Remove an RAW PCB.
mr_q 0:d8f2f7d5f31b 295 *
mr_q 0:d8f2f7d5f31b 296 * @param pcb RAW PCB to be removed. The PCB is removed from the list of
mr_q 0:d8f2f7d5f31b 297 * RAW PCB's and the data structure is freed from memory.
mr_q 0:d8f2f7d5f31b 298 *
mr_q 0:d8f2f7d5f31b 299 * @see raw_new()
mr_q 0:d8f2f7d5f31b 300 */
mr_q 0:d8f2f7d5f31b 301 void
mr_q 0:d8f2f7d5f31b 302 raw_remove(struct raw_pcb *pcb)
mr_q 0:d8f2f7d5f31b 303 {
mr_q 0:d8f2f7d5f31b 304 struct raw_pcb *pcb2;
mr_q 0:d8f2f7d5f31b 305 /* pcb to be removed is first in list? */
mr_q 0:d8f2f7d5f31b 306 if (raw_pcbs == pcb) {
mr_q 0:d8f2f7d5f31b 307 /* make list start at 2nd pcb */
mr_q 0:d8f2f7d5f31b 308 raw_pcbs = raw_pcbs->next;
mr_q 0:d8f2f7d5f31b 309 /* pcb not 1st in list */
mr_q 0:d8f2f7d5f31b 310 } else {
mr_q 0:d8f2f7d5f31b 311 for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
mr_q 0:d8f2f7d5f31b 312 /* find pcb in raw_pcbs list */
mr_q 0:d8f2f7d5f31b 313 if (pcb2->next != NULL && pcb2->next == pcb) {
mr_q 0:d8f2f7d5f31b 314 /* remove pcb from list */
mr_q 0:d8f2f7d5f31b 315 pcb2->next = pcb->next;
mr_q 0:d8f2f7d5f31b 316 }
mr_q 0:d8f2f7d5f31b 317 }
mr_q 0:d8f2f7d5f31b 318 }
mr_q 0:d8f2f7d5f31b 319 memp_free(MEMP_RAW_PCB, pcb);
mr_q 0:d8f2f7d5f31b 320 }
mr_q 0:d8f2f7d5f31b 321
mr_q 0:d8f2f7d5f31b 322 /**
mr_q 0:d8f2f7d5f31b 323 * Create a RAW PCB.
mr_q 0:d8f2f7d5f31b 324 *
mr_q 0:d8f2f7d5f31b 325 * @return The RAW PCB which was created. NULL if the PCB data structure
mr_q 0:d8f2f7d5f31b 326 * could not be allocated.
mr_q 0:d8f2f7d5f31b 327 *
mr_q 0:d8f2f7d5f31b 328 * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
mr_q 0:d8f2f7d5f31b 329 *
mr_q 0:d8f2f7d5f31b 330 * @see raw_remove()
mr_q 0:d8f2f7d5f31b 331 */
mr_q 0:d8f2f7d5f31b 332 struct raw_pcb *
mr_q 0:d8f2f7d5f31b 333 raw_new(u8_t proto)
mr_q 0:d8f2f7d5f31b 334 {
mr_q 0:d8f2f7d5f31b 335 struct raw_pcb *pcb;
mr_q 0:d8f2f7d5f31b 336
mr_q 0:d8f2f7d5f31b 337 LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
mr_q 0:d8f2f7d5f31b 338
mr_q 0:d8f2f7d5f31b 339 pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
mr_q 0:d8f2f7d5f31b 340 /* could allocate RAW PCB? */
mr_q 0:d8f2f7d5f31b 341 if (pcb != NULL) {
mr_q 0:d8f2f7d5f31b 342 /* initialize PCB to all zeroes */
mr_q 0:d8f2f7d5f31b 343 memset(pcb, 0, sizeof(struct raw_pcb));
mr_q 0:d8f2f7d5f31b 344 pcb->protocol = proto;
mr_q 0:d8f2f7d5f31b 345 pcb->ttl = RAW_TTL;
mr_q 0:d8f2f7d5f31b 346 pcb->next = raw_pcbs;
mr_q 0:d8f2f7d5f31b 347 raw_pcbs = pcb;
mr_q 0:d8f2f7d5f31b 348 }
mr_q 0:d8f2f7d5f31b 349 return pcb;
mr_q 0:d8f2f7d5f31b 350 }
mr_q 0:d8f2f7d5f31b 351
mr_q 0:d8f2f7d5f31b 352 #endif /* LWIP_RAW */