My fork of the HTTPServer (working)
Core/lwIP/core/raw.c@0:7a64fbb4069d, 2012-08-06 (annotated)
- Committer:
- screamer
- Date:
- Mon Aug 06 09:23:14 2012 +0000
- Revision:
- 0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:7a64fbb4069d | 1 | /** |
screamer | 0:7a64fbb4069d | 2 | * @file |
screamer | 0:7a64fbb4069d | 3 | * Implementation of raw protocol PCBs for low-level handling of |
screamer | 0:7a64fbb4069d | 4 | * different types of protocols besides (or overriding) those |
screamer | 0:7a64fbb4069d | 5 | * already available in lwIP. |
screamer | 0:7a64fbb4069d | 6 | * |
screamer | 0:7a64fbb4069d | 7 | */ |
screamer | 0:7a64fbb4069d | 8 | |
screamer | 0:7a64fbb4069d | 9 | /* |
screamer | 0:7a64fbb4069d | 10 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
screamer | 0:7a64fbb4069d | 11 | * All rights reserved. |
screamer | 0:7a64fbb4069d | 12 | * |
screamer | 0:7a64fbb4069d | 13 | * Redistribution and use in source and binary forms, with or without modification, |
screamer | 0:7a64fbb4069d | 14 | * are permitted provided that the following conditions are met: |
screamer | 0:7a64fbb4069d | 15 | * |
screamer | 0:7a64fbb4069d | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
screamer | 0:7a64fbb4069d | 17 | * this list of conditions and the following disclaimer. |
screamer | 0:7a64fbb4069d | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
screamer | 0:7a64fbb4069d | 19 | * this list of conditions and the following disclaimer in the documentation |
screamer | 0:7a64fbb4069d | 20 | * and/or other materials provided with the distribution. |
screamer | 0:7a64fbb4069d | 21 | * 3. The name of the author may not be used to endorse or promote products |
screamer | 0:7a64fbb4069d | 22 | * derived from this software without specific prior written permission. |
screamer | 0:7a64fbb4069d | 23 | * |
screamer | 0:7a64fbb4069d | 24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
screamer | 0:7a64fbb4069d | 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
screamer | 0:7a64fbb4069d | 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
screamer | 0:7a64fbb4069d | 27 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
screamer | 0:7a64fbb4069d | 28 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
screamer | 0:7a64fbb4069d | 29 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
screamer | 0:7a64fbb4069d | 30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
screamer | 0:7a64fbb4069d | 31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
screamer | 0:7a64fbb4069d | 32 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
screamer | 0:7a64fbb4069d | 33 | * OF SUCH DAMAGE. |
screamer | 0:7a64fbb4069d | 34 | * |
screamer | 0:7a64fbb4069d | 35 | * This file is part of the lwIP TCP/IP stack. |
screamer | 0:7a64fbb4069d | 36 | * |
screamer | 0:7a64fbb4069d | 37 | * Author: Adam Dunkels <adam@sics.se> |
screamer | 0:7a64fbb4069d | 38 | * |
screamer | 0:7a64fbb4069d | 39 | */ |
screamer | 0:7a64fbb4069d | 40 | |
screamer | 0:7a64fbb4069d | 41 | #include "lwip/opt.h" |
screamer | 0:7a64fbb4069d | 42 | |
screamer | 0:7a64fbb4069d | 43 | #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 44 | |
screamer | 0:7a64fbb4069d | 45 | #include "lwip/def.h" |
screamer | 0:7a64fbb4069d | 46 | #include "lwip/memp.h" |
screamer | 0:7a64fbb4069d | 47 | #include "lwip/inet.h" |
screamer | 0:7a64fbb4069d | 48 | #include "lwip/ip_addr.h" |
screamer | 0:7a64fbb4069d | 49 | #include "lwip/netif.h" |
screamer | 0:7a64fbb4069d | 50 | #include "lwip/raw.h" |
screamer | 0:7a64fbb4069d | 51 | #include "lwip/stats.h" |
screamer | 0:7a64fbb4069d | 52 | #include "lwip/snmp.h" |
screamer | 0:7a64fbb4069d | 53 | #include "arch/perf.h" |
screamer | 0:7a64fbb4069d | 54 | |
screamer | 0:7a64fbb4069d | 55 | #include <string.h> |
screamer | 0:7a64fbb4069d | 56 | |
screamer | 0:7a64fbb4069d | 57 | /** The list of RAW PCBs */ |
screamer | 0:7a64fbb4069d | 58 | static struct raw_pcb *raw_pcbs; |
screamer | 0:7a64fbb4069d | 59 | |
screamer | 0:7a64fbb4069d | 60 | /** |
screamer | 0:7a64fbb4069d | 61 | * Determine if in incoming IP packet is covered by a RAW PCB |
screamer | 0:7a64fbb4069d | 62 | * and if so, pass it to a user-provided receive callback function. |
screamer | 0:7a64fbb4069d | 63 | * |
screamer | 0:7a64fbb4069d | 64 | * Given an incoming IP datagram (as a chain of pbufs) this function |
screamer | 0:7a64fbb4069d | 65 | * finds a corresponding RAW PCB and calls the corresponding receive |
screamer | 0:7a64fbb4069d | 66 | * callback function. |
screamer | 0:7a64fbb4069d | 67 | * |
screamer | 0:7a64fbb4069d | 68 | * @param p pbuf to be demultiplexed to a RAW PCB. |
screamer | 0:7a64fbb4069d | 69 | * @param inp network interface on which the datagram was received. |
screamer | 0:7a64fbb4069d | 70 | * @return - 1 if the packet has been eaten by a RAW PCB receive |
screamer | 0:7a64fbb4069d | 71 | * callback function. The caller MAY NOT not reference the |
screamer | 0:7a64fbb4069d | 72 | * packet any longer, and MAY NOT call pbuf_free(). |
screamer | 0:7a64fbb4069d | 73 | * @return - 0 if packet is not eaten (pbuf is still referenced by the |
screamer | 0:7a64fbb4069d | 74 | * caller). |
screamer | 0:7a64fbb4069d | 75 | * |
screamer | 0:7a64fbb4069d | 76 | */ |
screamer | 0:7a64fbb4069d | 77 | u8_t |
screamer | 0:7a64fbb4069d | 78 | raw_input(struct pbuf *p, struct netif *inp) |
screamer | 0:7a64fbb4069d | 79 | { |
screamer | 0:7a64fbb4069d | 80 | struct raw_pcb *pcb, *prev; |
screamer | 0:7a64fbb4069d | 81 | struct ip_hdr *iphdr; |
screamer | 0:7a64fbb4069d | 82 | s16_t proto; |
screamer | 0:7a64fbb4069d | 83 | u8_t eaten = 0; |
screamer | 0:7a64fbb4069d | 84 | |
screamer | 0:7a64fbb4069d | 85 | LWIP_UNUSED_ARG(inp); |
screamer | 0:7a64fbb4069d | 86 | |
screamer | 0:7a64fbb4069d | 87 | iphdr = (struct ip_hdr *)(p->payload); // static_cast<struct ip_hdr *>(x) |
screamer | 0:7a64fbb4069d | 88 | proto = IPH_PROTO(iphdr); |
screamer | 0:7a64fbb4069d | 89 | |
screamer | 0:7a64fbb4069d | 90 | prev = NULL; |
screamer | 0:7a64fbb4069d | 91 | pcb = raw_pcbs; |
screamer | 0:7a64fbb4069d | 92 | /* loop through all raw pcbs until the packet is eaten by one */ |
screamer | 0:7a64fbb4069d | 93 | /* this allows multiple pcbs to match against the packet by design */ |
screamer | 0:7a64fbb4069d | 94 | while ((eaten == 0) && (pcb != NULL)) { |
screamer | 0:7a64fbb4069d | 95 | if (pcb->protocol == proto) { |
screamer | 0:7a64fbb4069d | 96 | /* receive callback function available? */ |
screamer | 0:7a64fbb4069d | 97 | if (pcb->recv != NULL) { |
screamer | 0:7a64fbb4069d | 98 | /* the receive callback function did not eat the packet? */ |
screamer | 0:7a64fbb4069d | 99 | struct ip_addr iphdrsrc; |
screamer | 0:7a64fbb4069d | 100 | iphdrsrc.addr = iphdr->src.addr; |
screamer | 0:7a64fbb4069d | 101 | if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdrsrc)) != 0) |
screamer | 0:7a64fbb4069d | 102 | { |
screamer | 0:7a64fbb4069d | 103 | /* receive function ate the packet */ |
screamer | 0:7a64fbb4069d | 104 | p = NULL; |
screamer | 0:7a64fbb4069d | 105 | eaten = 1; |
screamer | 0:7a64fbb4069d | 106 | if (prev != NULL) { |
screamer | 0:7a64fbb4069d | 107 | /* move the pcb to the front of raw_pcbs so that is |
screamer | 0:7a64fbb4069d | 108 | found faster next time */ |
screamer | 0:7a64fbb4069d | 109 | prev->next = pcb->next; |
screamer | 0:7a64fbb4069d | 110 | pcb->next = raw_pcbs; |
screamer | 0:7a64fbb4069d | 111 | raw_pcbs = pcb; |
screamer | 0:7a64fbb4069d | 112 | } |
screamer | 0:7a64fbb4069d | 113 | } |
screamer | 0:7a64fbb4069d | 114 | } |
screamer | 0:7a64fbb4069d | 115 | /* no receive callback function was set for this raw PCB */ |
screamer | 0:7a64fbb4069d | 116 | /* drop the packet */ |
screamer | 0:7a64fbb4069d | 117 | } |
screamer | 0:7a64fbb4069d | 118 | prev = pcb; |
screamer | 0:7a64fbb4069d | 119 | pcb = pcb->next; |
screamer | 0:7a64fbb4069d | 120 | } |
screamer | 0:7a64fbb4069d | 121 | return eaten; |
screamer | 0:7a64fbb4069d | 122 | } |
screamer | 0:7a64fbb4069d | 123 | |
screamer | 0:7a64fbb4069d | 124 | /** |
screamer | 0:7a64fbb4069d | 125 | * Bind a RAW PCB. |
screamer | 0:7a64fbb4069d | 126 | * |
screamer | 0:7a64fbb4069d | 127 | * @param pcb RAW PCB to be bound with a local address ipaddr. |
screamer | 0:7a64fbb4069d | 128 | * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to |
screamer | 0:7a64fbb4069d | 129 | * bind to all local interfaces. |
screamer | 0:7a64fbb4069d | 130 | * |
screamer | 0:7a64fbb4069d | 131 | * @return lwIP error code. |
screamer | 0:7a64fbb4069d | 132 | * - ERR_OK. Successful. No error occured. |
screamer | 0:7a64fbb4069d | 133 | * - ERR_USE. The specified IP address is already bound to by |
screamer | 0:7a64fbb4069d | 134 | * another RAW PCB. |
screamer | 0:7a64fbb4069d | 135 | * |
screamer | 0:7a64fbb4069d | 136 | * @see raw_disconnect() |
screamer | 0:7a64fbb4069d | 137 | */ |
screamer | 0:7a64fbb4069d | 138 | err_t |
screamer | 0:7a64fbb4069d | 139 | raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr) |
screamer | 0:7a64fbb4069d | 140 | { |
screamer | 0:7a64fbb4069d | 141 | ip_addr_set(&pcb->local_ip, ipaddr); |
screamer | 0:7a64fbb4069d | 142 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 143 | } |
screamer | 0:7a64fbb4069d | 144 | |
screamer | 0:7a64fbb4069d | 145 | /** |
screamer | 0:7a64fbb4069d | 146 | * Connect an RAW PCB. This function is required by upper layers |
screamer | 0:7a64fbb4069d | 147 | * of lwip. Using the raw api you could use raw_sendto() instead |
screamer | 0:7a64fbb4069d | 148 | * |
screamer | 0:7a64fbb4069d | 149 | * This will associate the RAW PCB with the remote address. |
screamer | 0:7a64fbb4069d | 150 | * |
screamer | 0:7a64fbb4069d | 151 | * @param pcb RAW PCB to be connected with remote address ipaddr and port. |
screamer | 0:7a64fbb4069d | 152 | * @param ipaddr remote IP address to connect with. |
screamer | 0:7a64fbb4069d | 153 | * |
screamer | 0:7a64fbb4069d | 154 | * @return lwIP error code |
screamer | 0:7a64fbb4069d | 155 | * |
screamer | 0:7a64fbb4069d | 156 | * @see raw_disconnect() and raw_sendto() |
screamer | 0:7a64fbb4069d | 157 | */ |
screamer | 0:7a64fbb4069d | 158 | err_t |
screamer | 0:7a64fbb4069d | 159 | raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr) |
screamer | 0:7a64fbb4069d | 160 | { |
screamer | 0:7a64fbb4069d | 161 | ip_addr_set(&pcb->remote_ip, ipaddr); |
screamer | 0:7a64fbb4069d | 162 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 163 | } |
screamer | 0:7a64fbb4069d | 164 | |
screamer | 0:7a64fbb4069d | 165 | |
screamer | 0:7a64fbb4069d | 166 | /** |
screamer | 0:7a64fbb4069d | 167 | * Set the callback function for received packets that match the |
screamer | 0:7a64fbb4069d | 168 | * raw PCB's protocol and binding. |
screamer | 0:7a64fbb4069d | 169 | * |
screamer | 0:7a64fbb4069d | 170 | * The callback function MUST either |
screamer | 0:7a64fbb4069d | 171 | * - eat the packet by calling pbuf_free() and returning non-zero. The |
screamer | 0:7a64fbb4069d | 172 | * packet will not be passed to other raw PCBs or other protocol layers. |
screamer | 0:7a64fbb4069d | 173 | * - not free the packet, and return zero. The packet will be matched |
screamer | 0:7a64fbb4069d | 174 | * against further PCBs and/or forwarded to another protocol layers. |
screamer | 0:7a64fbb4069d | 175 | * |
screamer | 0:7a64fbb4069d | 176 | * @return non-zero if the packet was free()d, zero if the packet remains |
screamer | 0:7a64fbb4069d | 177 | * available for others. |
screamer | 0:7a64fbb4069d | 178 | */ |
screamer | 0:7a64fbb4069d | 179 | void |
screamer | 0:7a64fbb4069d | 180 | raw_recv(struct raw_pcb *pcb, |
screamer | 0:7a64fbb4069d | 181 | u8_t (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p, |
screamer | 0:7a64fbb4069d | 182 | struct ip_addr *addr), |
screamer | 0:7a64fbb4069d | 183 | void *recv_arg) |
screamer | 0:7a64fbb4069d | 184 | { |
screamer | 0:7a64fbb4069d | 185 | /* remember recv() callback and user data */ |
screamer | 0:7a64fbb4069d | 186 | pcb->recv = recv; |
screamer | 0:7a64fbb4069d | 187 | pcb->recv_arg = recv_arg; |
screamer | 0:7a64fbb4069d | 188 | } |
screamer | 0:7a64fbb4069d | 189 | |
screamer | 0:7a64fbb4069d | 190 | /** |
screamer | 0:7a64fbb4069d | 191 | * Send the raw IP packet to the given address. Note that actually you cannot |
screamer | 0:7a64fbb4069d | 192 | * modify the IP headers (this is inconsistent with the receive callback where |
screamer | 0:7a64fbb4069d | 193 | * you actually get the IP headers), you can only specify the IP payload here. |
screamer | 0:7a64fbb4069d | 194 | * It requires some more changes in lwIP. (there will be a raw_send() function |
screamer | 0:7a64fbb4069d | 195 | * then.) |
screamer | 0:7a64fbb4069d | 196 | * |
screamer | 0:7a64fbb4069d | 197 | * @param pcb the raw pcb which to send |
screamer | 0:7a64fbb4069d | 198 | * @param p the IP payload to send |
screamer | 0:7a64fbb4069d | 199 | * @param ipaddr the destination address of the IP packet |
screamer | 0:7a64fbb4069d | 200 | * |
screamer | 0:7a64fbb4069d | 201 | */ |
screamer | 0:7a64fbb4069d | 202 | err_t |
screamer | 0:7a64fbb4069d | 203 | raw_sendto(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr) |
screamer | 0:7a64fbb4069d | 204 | { |
screamer | 0:7a64fbb4069d | 205 | err_t err; |
screamer | 0:7a64fbb4069d | 206 | struct netif *netif; |
screamer | 0:7a64fbb4069d | 207 | struct ip_addr *src_ip; |
screamer | 0:7a64fbb4069d | 208 | struct pbuf *q; /* q will be sent down the stack */ |
screamer | 0:7a64fbb4069d | 209 | |
screamer | 0:7a64fbb4069d | 210 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_sendto\n")); |
screamer | 0:7a64fbb4069d | 211 | |
screamer | 0:7a64fbb4069d | 212 | /* not enough space to add an IP header to first pbuf in given p chain? */ |
screamer | 0:7a64fbb4069d | 213 | if (pbuf_header(p, IP_HLEN)) { |
screamer | 0:7a64fbb4069d | 214 | /* allocate header in new pbuf */ |
screamer | 0:7a64fbb4069d | 215 | q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM); |
screamer | 0:7a64fbb4069d | 216 | /* new header pbuf could not be allocated? */ |
screamer | 0:7a64fbb4069d | 217 | if (q == NULL) { |
screamer | 0:7a64fbb4069d | 218 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 2, ("raw_sendto: could not allocate header\n")); |
screamer | 0:7a64fbb4069d | 219 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 220 | } |
screamer | 0:7a64fbb4069d | 221 | /* chain header q in front of given pbuf p */ |
screamer | 0:7a64fbb4069d | 222 | pbuf_chain(q, p); |
screamer | 0:7a64fbb4069d | 223 | /* { first pbuf q points to header pbuf } */ |
screamer | 0:7a64fbb4069d | 224 | LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); |
screamer | 0:7a64fbb4069d | 225 | } else { |
screamer | 0:7a64fbb4069d | 226 | /* first pbuf q equals given pbuf */ |
screamer | 0:7a64fbb4069d | 227 | q = p; |
screamer | 0:7a64fbb4069d | 228 | if(pbuf_header(q, -IP_HLEN)) { |
screamer | 0:7a64fbb4069d | 229 | LWIP_ASSERT("Can't restore header we just removed!", 0); |
screamer | 0:7a64fbb4069d | 230 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 231 | } |
screamer | 0:7a64fbb4069d | 232 | } |
screamer | 0:7a64fbb4069d | 233 | |
screamer | 0:7a64fbb4069d | 234 | if ((netif = ip_route(ipaddr)) == NULL) { |
screamer | 0:7a64fbb4069d | 235 | LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: No route to 0x%"X32_F"\n", ipaddr->addr)); |
screamer | 0:7a64fbb4069d | 236 | /* free any temporary header pbuf allocated by pbuf_header() */ |
screamer | 0:7a64fbb4069d | 237 | if (q != p) { |
screamer | 0:7a64fbb4069d | 238 | pbuf_free(q); |
screamer | 0:7a64fbb4069d | 239 | } |
screamer | 0:7a64fbb4069d | 240 | return ERR_RTE; |
screamer | 0:7a64fbb4069d | 241 | } |
screamer | 0:7a64fbb4069d | 242 | |
screamer | 0:7a64fbb4069d | 243 | if (ip_addr_isany(&pcb->local_ip)) { |
screamer | 0:7a64fbb4069d | 244 | /* use outgoing network interface IP address as source address */ |
screamer | 0:7a64fbb4069d | 245 | src_ip = &(netif->ip_addr); |
screamer | 0:7a64fbb4069d | 246 | } else { |
screamer | 0:7a64fbb4069d | 247 | /* use RAW PCB local IP address as source address */ |
screamer | 0:7a64fbb4069d | 248 | src_ip = &(pcb->local_ip); |
screamer | 0:7a64fbb4069d | 249 | } |
screamer | 0:7a64fbb4069d | 250 | |
screamer | 0:7a64fbb4069d | 251 | #if LWIP_NETIF_HWADDRHINT |
screamer | 0:7a64fbb4069d | 252 | netif->addr_hint = &(pcb->addr_hint); |
screamer | 0:7a64fbb4069d | 253 | #endif /* LWIP_NETIF_HWADDRHINT*/ |
screamer | 0:7a64fbb4069d | 254 | err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif); |
screamer | 0:7a64fbb4069d | 255 | #if LWIP_NETIF_HWADDRHINT |
screamer | 0:7a64fbb4069d | 256 | netif->addr_hint = NULL; |
screamer | 0:7a64fbb4069d | 257 | #endif /* LWIP_NETIF_HWADDRHINT*/ |
screamer | 0:7a64fbb4069d | 258 | |
screamer | 0:7a64fbb4069d | 259 | /* did we chain a header earlier? */ |
screamer | 0:7a64fbb4069d | 260 | if (q != p) { |
screamer | 0:7a64fbb4069d | 261 | /* free the header */ |
screamer | 0:7a64fbb4069d | 262 | pbuf_free(q); |
screamer | 0:7a64fbb4069d | 263 | } |
screamer | 0:7a64fbb4069d | 264 | return err; |
screamer | 0:7a64fbb4069d | 265 | } |
screamer | 0:7a64fbb4069d | 266 | |
screamer | 0:7a64fbb4069d | 267 | /** |
screamer | 0:7a64fbb4069d | 268 | * Send the raw IP packet to the address given by raw_connect() |
screamer | 0:7a64fbb4069d | 269 | * |
screamer | 0:7a64fbb4069d | 270 | * @param pcb the raw pcb which to send |
screamer | 0:7a64fbb4069d | 271 | * @param p the IP payload to send |
screamer | 0:7a64fbb4069d | 272 | * |
screamer | 0:7a64fbb4069d | 273 | */ |
screamer | 0:7a64fbb4069d | 274 | err_t |
screamer | 0:7a64fbb4069d | 275 | raw_send(struct raw_pcb *pcb, struct pbuf *p) |
screamer | 0:7a64fbb4069d | 276 | { |
screamer | 0:7a64fbb4069d | 277 | return raw_sendto(pcb, p, &pcb->remote_ip); |
screamer | 0:7a64fbb4069d | 278 | } |
screamer | 0:7a64fbb4069d | 279 | |
screamer | 0:7a64fbb4069d | 280 | /** |
screamer | 0:7a64fbb4069d | 281 | * Remove an RAW PCB. |
screamer | 0:7a64fbb4069d | 282 | * |
screamer | 0:7a64fbb4069d | 283 | * @param pcb RAW PCB to be removed. The PCB is removed from the list of |
screamer | 0:7a64fbb4069d | 284 | * RAW PCB's and the data structure is freed from memory. |
screamer | 0:7a64fbb4069d | 285 | * |
screamer | 0:7a64fbb4069d | 286 | * @see raw_new() |
screamer | 0:7a64fbb4069d | 287 | */ |
screamer | 0:7a64fbb4069d | 288 | void |
screamer | 0:7a64fbb4069d | 289 | raw_remove(struct raw_pcb *pcb) |
screamer | 0:7a64fbb4069d | 290 | { |
screamer | 0:7a64fbb4069d | 291 | struct raw_pcb *pcb2; |
screamer | 0:7a64fbb4069d | 292 | /* pcb to be removed is first in list? */ |
screamer | 0:7a64fbb4069d | 293 | if (raw_pcbs == pcb) { |
screamer | 0:7a64fbb4069d | 294 | /* make list start at 2nd pcb */ |
screamer | 0:7a64fbb4069d | 295 | raw_pcbs = raw_pcbs->next; |
screamer | 0:7a64fbb4069d | 296 | /* pcb not 1st in list */ |
screamer | 0:7a64fbb4069d | 297 | } else { |
screamer | 0:7a64fbb4069d | 298 | for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { |
screamer | 0:7a64fbb4069d | 299 | /* find pcb in raw_pcbs list */ |
screamer | 0:7a64fbb4069d | 300 | if (pcb2->next != NULL && pcb2->next == pcb) { |
screamer | 0:7a64fbb4069d | 301 | /* remove pcb from list */ |
screamer | 0:7a64fbb4069d | 302 | pcb2->next = pcb->next; |
screamer | 0:7a64fbb4069d | 303 | } |
screamer | 0:7a64fbb4069d | 304 | } |
screamer | 0:7a64fbb4069d | 305 | } |
screamer | 0:7a64fbb4069d | 306 | memp_free(MEMP_RAW_PCB, pcb); |
screamer | 0:7a64fbb4069d | 307 | } |
screamer | 0:7a64fbb4069d | 308 | |
screamer | 0:7a64fbb4069d | 309 | /** |
screamer | 0:7a64fbb4069d | 310 | * Create a RAW PCB. |
screamer | 0:7a64fbb4069d | 311 | * |
screamer | 0:7a64fbb4069d | 312 | * @return The RAW PCB which was created. NULL if the PCB data structure |
screamer | 0:7a64fbb4069d | 313 | * could not be allocated. |
screamer | 0:7a64fbb4069d | 314 | * |
screamer | 0:7a64fbb4069d | 315 | * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP) |
screamer | 0:7a64fbb4069d | 316 | * |
screamer | 0:7a64fbb4069d | 317 | * @see raw_remove() |
screamer | 0:7a64fbb4069d | 318 | */ |
screamer | 0:7a64fbb4069d | 319 | struct raw_pcb * |
screamer | 0:7a64fbb4069d | 320 | raw_new(u8_t proto) { |
screamer | 0:7a64fbb4069d | 321 | struct raw_pcb *pcb; |
screamer | 0:7a64fbb4069d | 322 | |
screamer | 0:7a64fbb4069d | 323 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_new\n")); |
screamer | 0:7a64fbb4069d | 324 | |
screamer | 0:7a64fbb4069d | 325 | pcb = (struct raw_pcb *)(memp_malloc(MEMP_RAW_PCB)); // static_cast<struct raw_pcb *>(x) |
screamer | 0:7a64fbb4069d | 326 | /* could allocate RAW PCB? */ |
screamer | 0:7a64fbb4069d | 327 | if (pcb != NULL) { |
screamer | 0:7a64fbb4069d | 328 | /* initialize PCB to all zeroes */ |
screamer | 0:7a64fbb4069d | 329 | memset(pcb, 0, sizeof(struct raw_pcb)); |
screamer | 0:7a64fbb4069d | 330 | pcb->protocol = proto; |
screamer | 0:7a64fbb4069d | 331 | pcb->ttl = RAW_TTL; |
screamer | 0:7a64fbb4069d | 332 | pcb->next = raw_pcbs; |
screamer | 0:7a64fbb4069d | 333 | raw_pcbs = pcb; |
screamer | 0:7a64fbb4069d | 334 | } |
screamer | 0:7a64fbb4069d | 335 | return pcb; |
screamer | 0:7a64fbb4069d | 336 | } |
screamer | 0:7a64fbb4069d | 337 | |
screamer | 0:7a64fbb4069d | 338 | #endif /* LWIP_RAW */ |