Pehr Hovey
Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed
Core/lwIP/core/raw.c@0:a548a085de55, 2010-03-14 (annotated)
- Committer:
- pehrhovey
- Date:
- Sun Mar 14 00:54:12 2010 +0000
- Revision:
- 0:a548a085de55
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| pehrhovey | 0:a548a085de55 | 1 | /** |
| pehrhovey | 0:a548a085de55 | 2 | * @file |
| pehrhovey | 0:a548a085de55 | 3 | * Implementation of raw protocol PCBs for low-level handling of |
| pehrhovey | 0:a548a085de55 | 4 | * different types of protocols besides (or overriding) those |
| pehrhovey | 0:a548a085de55 | 5 | * already available in lwIP. |
| pehrhovey | 0:a548a085de55 | 6 | * |
| pehrhovey | 0:a548a085de55 | 7 | */ |
| pehrhovey | 0:a548a085de55 | 8 | |
| pehrhovey | 0:a548a085de55 | 9 | /* |
| pehrhovey | 0:a548a085de55 | 10 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| pehrhovey | 0:a548a085de55 | 11 | * All rights reserved. |
| pehrhovey | 0:a548a085de55 | 12 | * |
| pehrhovey | 0:a548a085de55 | 13 | * Redistribution and use in source and binary forms, with or without modification, |
| pehrhovey | 0:a548a085de55 | 14 | * are permitted provided that the following conditions are met: |
| pehrhovey | 0:a548a085de55 | 15 | * |
| pehrhovey | 0:a548a085de55 | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 17 | * this list of conditions and the following disclaimer. |
| pehrhovey | 0:a548a085de55 | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| pehrhovey | 0:a548a085de55 | 19 | * this list of conditions and the following disclaimer in the documentation |
| pehrhovey | 0:a548a085de55 | 20 | * and/or other materials provided with the distribution. |
| pehrhovey | 0:a548a085de55 | 21 | * 3. The name of the author may not be used to endorse or promote products |
| pehrhovey | 0:a548a085de55 | 22 | * derived from this software without specific prior written permission. |
| pehrhovey | 0:a548a085de55 | 23 | * |
| pehrhovey | 0:a548a085de55 | 24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| pehrhovey | 0:a548a085de55 | 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| pehrhovey | 0:a548a085de55 | 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| pehrhovey | 0:a548a085de55 | 27 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| pehrhovey | 0:a548a085de55 | 28 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| pehrhovey | 0:a548a085de55 | 29 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| pehrhovey | 0:a548a085de55 | 30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| pehrhovey | 0:a548a085de55 | 31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| pehrhovey | 0:a548a085de55 | 32 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| pehrhovey | 0:a548a085de55 | 33 | * OF SUCH DAMAGE. |
| pehrhovey | 0:a548a085de55 | 34 | * |
| pehrhovey | 0:a548a085de55 | 35 | * This file is part of the lwIP TCP/IP stack. |
| pehrhovey | 0:a548a085de55 | 36 | * |
| pehrhovey | 0:a548a085de55 | 37 | * Author: Adam Dunkels <adam@sics.se> |
| pehrhovey | 0:a548a085de55 | 38 | * |
| pehrhovey | 0:a548a085de55 | 39 | */ |
| pehrhovey | 0:a548a085de55 | 40 | |
| pehrhovey | 0:a548a085de55 | 41 | #include "lwip/opt.h" |
| pehrhovey | 0:a548a085de55 | 42 | |
| pehrhovey | 0:a548a085de55 | 43 | #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */ |
| pehrhovey | 0:a548a085de55 | 44 | |
| pehrhovey | 0:a548a085de55 | 45 | #include "lwip/def.h" |
| pehrhovey | 0:a548a085de55 | 46 | #include "lwip/memp.h" |
| pehrhovey | 0:a548a085de55 | 47 | #include "lwip/inet.h" |
| pehrhovey | 0:a548a085de55 | 48 | #include "lwip/ip_addr.h" |
| pehrhovey | 0:a548a085de55 | 49 | #include "lwip/netif.h" |
| pehrhovey | 0:a548a085de55 | 50 | #include "lwip/raw.h" |
| pehrhovey | 0:a548a085de55 | 51 | #include "lwip/stats.h" |
| pehrhovey | 0:a548a085de55 | 52 | #include "lwip/snmp.h" |
| pehrhovey | 0:a548a085de55 | 53 | #include "arch/perf.h" |
| pehrhovey | 0:a548a085de55 | 54 | |
| pehrhovey | 0:a548a085de55 | 55 | #include <string.h> |
| pehrhovey | 0:a548a085de55 | 56 | |
| pehrhovey | 0:a548a085de55 | 57 | /** The list of RAW PCBs */ |
| pehrhovey | 0:a548a085de55 | 58 | static struct raw_pcb *raw_pcbs; |
| pehrhovey | 0:a548a085de55 | 59 | |
| pehrhovey | 0:a548a085de55 | 60 | /** |
| pehrhovey | 0:a548a085de55 | 61 | * Determine if in incoming IP packet is covered by a RAW PCB |
| pehrhovey | 0:a548a085de55 | 62 | * and if so, pass it to a user-provided receive callback function. |
| pehrhovey | 0:a548a085de55 | 63 | * |
| pehrhovey | 0:a548a085de55 | 64 | * Given an incoming IP datagram (as a chain of pbufs) this function |
| pehrhovey | 0:a548a085de55 | 65 | * finds a corresponding RAW PCB and calls the corresponding receive |
| pehrhovey | 0:a548a085de55 | 66 | * callback function. |
| pehrhovey | 0:a548a085de55 | 67 | * |
| pehrhovey | 0:a548a085de55 | 68 | * @param p pbuf to be demultiplexed to a RAW PCB. |
| pehrhovey | 0:a548a085de55 | 69 | * @param inp network interface on which the datagram was received. |
| pehrhovey | 0:a548a085de55 | 70 | * @return - 1 if the packet has been eaten by a RAW PCB receive |
| pehrhovey | 0:a548a085de55 | 71 | * callback function. The caller MAY NOT not reference the |
| pehrhovey | 0:a548a085de55 | 72 | * packet any longer, and MAY NOT call pbuf_free(). |
| pehrhovey | 0:a548a085de55 | 73 | * @return - 0 if packet is not eaten (pbuf is still referenced by the |
| pehrhovey | 0:a548a085de55 | 74 | * caller). |
| pehrhovey | 0:a548a085de55 | 75 | * |
| pehrhovey | 0:a548a085de55 | 76 | */ |
| pehrhovey | 0:a548a085de55 | 77 | u8_t |
| pehrhovey | 0:a548a085de55 | 78 | raw_input(struct pbuf *p, struct netif *inp) |
| pehrhovey | 0:a548a085de55 | 79 | { |
| pehrhovey | 0:a548a085de55 | 80 | struct raw_pcb *pcb, *prev; |
| pehrhovey | 0:a548a085de55 | 81 | struct ip_hdr *iphdr; |
| pehrhovey | 0:a548a085de55 | 82 | s16_t proto; |
| pehrhovey | 0:a548a085de55 | 83 | u8_t eaten = 0; |
| pehrhovey | 0:a548a085de55 | 84 | |
| pehrhovey | 0:a548a085de55 | 85 | LWIP_UNUSED_ARG(inp); |
| pehrhovey | 0:a548a085de55 | 86 | |
| pehrhovey | 0:a548a085de55 | 87 | iphdr = p->payload; |
| pehrhovey | 0:a548a085de55 | 88 | proto = IPH_PROTO(iphdr); |
| pehrhovey | 0:a548a085de55 | 89 | |
| pehrhovey | 0:a548a085de55 | 90 | prev = NULL; |
| pehrhovey | 0:a548a085de55 | 91 | pcb = raw_pcbs; |
| pehrhovey | 0:a548a085de55 | 92 | /* loop through all raw pcbs until the packet is eaten by one */ |
| pehrhovey | 0:a548a085de55 | 93 | /* this allows multiple pcbs to match against the packet by design */ |
| pehrhovey | 0:a548a085de55 | 94 | while ((eaten == 0) && (pcb != NULL)) { |
| pehrhovey | 0:a548a085de55 | 95 | if (pcb->protocol == proto) { |
| pehrhovey | 0:a548a085de55 | 96 | #if IP_SOF_BROADCAST_RECV |
| pehrhovey | 0:a548a085de55 | 97 | /* broadcast filter? */ |
| pehrhovey | 0:a548a085de55 | 98 | if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&(iphdr->dest), inp)) |
| pehrhovey | 0:a548a085de55 | 99 | #endif /* IP_SOF_BROADCAST_RECV */ |
| pehrhovey | 0:a548a085de55 | 100 | { |
| pehrhovey | 0:a548a085de55 | 101 | /* receive callback function available? */ |
| pehrhovey | 0:a548a085de55 | 102 | if (pcb->recv != NULL) { |
| pehrhovey | 0:a548a085de55 | 103 | /* the receive callback function did not eat the packet? */ |
| pehrhovey | 0:a548a085de55 | 104 | if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) { |
| pehrhovey | 0:a548a085de55 | 105 | /* receive function ate the packet */ |
| pehrhovey | 0:a548a085de55 | 106 | p = NULL; |
| pehrhovey | 0:a548a085de55 | 107 | eaten = 1; |
| pehrhovey | 0:a548a085de55 | 108 | if (prev != NULL) { |
| pehrhovey | 0:a548a085de55 | 109 | /* move the pcb to the front of raw_pcbs so that is |
| pehrhovey | 0:a548a085de55 | 110 | found faster next time */ |
| pehrhovey | 0:a548a085de55 | 111 | prev->next = pcb->next; |
| pehrhovey | 0:a548a085de55 | 112 | pcb->next = raw_pcbs; |
| pehrhovey | 0:a548a085de55 | 113 | raw_pcbs = pcb; |
| pehrhovey | 0:a548a085de55 | 114 | } |
| pehrhovey | 0:a548a085de55 | 115 | } |
| pehrhovey | 0:a548a085de55 | 116 | } |
| pehrhovey | 0:a548a085de55 | 117 | /* no receive callback function was set for this raw PCB */ |
| pehrhovey | 0:a548a085de55 | 118 | } |
| pehrhovey | 0:a548a085de55 | 119 | /* drop the packet */ |
| pehrhovey | 0:a548a085de55 | 120 | } |
| pehrhovey | 0:a548a085de55 | 121 | prev = pcb; |
| pehrhovey | 0:a548a085de55 | 122 | pcb = pcb->next; |
| pehrhovey | 0:a548a085de55 | 123 | } |
| pehrhovey | 0:a548a085de55 | 124 | return eaten; |
| pehrhovey | 0:a548a085de55 | 125 | } |
| pehrhovey | 0:a548a085de55 | 126 | |
| pehrhovey | 0:a548a085de55 | 127 | /** |
| pehrhovey | 0:a548a085de55 | 128 | * Bind a RAW PCB. |
| pehrhovey | 0:a548a085de55 | 129 | * |
| pehrhovey | 0:a548a085de55 | 130 | * @param pcb RAW PCB to be bound with a local address ipaddr. |
| pehrhovey | 0:a548a085de55 | 131 | * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to |
| pehrhovey | 0:a548a085de55 | 132 | * bind to all local interfaces. |
| pehrhovey | 0:a548a085de55 | 133 | * |
| pehrhovey | 0:a548a085de55 | 134 | * @return lwIP error code. |
| pehrhovey | 0:a548a085de55 | 135 | * - ERR_OK. Successful. No error occured. |
| pehrhovey | 0:a548a085de55 | 136 | * - ERR_USE. The specified IP address is already bound to by |
| pehrhovey | 0:a548a085de55 | 137 | * another RAW PCB. |
| pehrhovey | 0:a548a085de55 | 138 | * |
| pehrhovey | 0:a548a085de55 | 139 | * @see raw_disconnect() |
| pehrhovey | 0:a548a085de55 | 140 | */ |
| pehrhovey | 0:a548a085de55 | 141 | err_t |
| pehrhovey | 0:a548a085de55 | 142 | raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr) |
| pehrhovey | 0:a548a085de55 | 143 | { |
| pehrhovey | 0:a548a085de55 | 144 | ip_addr_set(&pcb->local_ip, ipaddr); |
| pehrhovey | 0:a548a085de55 | 145 | return ERR_OK; |
| pehrhovey | 0:a548a085de55 | 146 | } |
| pehrhovey | 0:a548a085de55 | 147 | |
| pehrhovey | 0:a548a085de55 | 148 | /** |
| pehrhovey | 0:a548a085de55 | 149 | * Connect an RAW PCB. This function is required by upper layers |
| pehrhovey | 0:a548a085de55 | 150 | * of lwip. Using the raw api you could use raw_sendto() instead |
| pehrhovey | 0:a548a085de55 | 151 | * |
| pehrhovey | 0:a548a085de55 | 152 | * This will associate the RAW PCB with the remote address. |
| pehrhovey | 0:a548a085de55 | 153 | * |
| pehrhovey | 0:a548a085de55 | 154 | * @param pcb RAW PCB to be connected with remote address ipaddr and port. |
| pehrhovey | 0:a548a085de55 | 155 | * @param ipaddr remote IP address to connect with. |
| pehrhovey | 0:a548a085de55 | 156 | * |
| pehrhovey | 0:a548a085de55 | 157 | * @return lwIP error code |
| pehrhovey | 0:a548a085de55 | 158 | * |
| pehrhovey | 0:a548a085de55 | 159 | * @see raw_disconnect() and raw_sendto() |
| pehrhovey | 0:a548a085de55 | 160 | */ |
| pehrhovey | 0:a548a085de55 | 161 | err_t |
| pehrhovey | 0:a548a085de55 | 162 | raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr) |
| pehrhovey | 0:a548a085de55 | 163 | { |
| pehrhovey | 0:a548a085de55 | 164 | ip_addr_set(&pcb->remote_ip, ipaddr); |
| pehrhovey | 0:a548a085de55 | 165 | return ERR_OK; |
| pehrhovey | 0:a548a085de55 | 166 | } |
| pehrhovey | 0:a548a085de55 | 167 | |
| pehrhovey | 0:a548a085de55 | 168 | |
| pehrhovey | 0:a548a085de55 | 169 | /** |
| pehrhovey | 0:a548a085de55 | 170 | * Set the callback function for received packets that match the |
| pehrhovey | 0:a548a085de55 | 171 | * raw PCB's protocol and binding. |
| pehrhovey | 0:a548a085de55 | 172 | * |
| pehrhovey | 0:a548a085de55 | 173 | * The callback function MUST either |
| pehrhovey | 0:a548a085de55 | 174 | * - eat the packet by calling pbuf_free() and returning non-zero. The |
| pehrhovey | 0:a548a085de55 | 175 | * packet will not be passed to other raw PCBs or other protocol layers. |
| pehrhovey | 0:a548a085de55 | 176 | * - not free the packet, and return zero. The packet will be matched |
| pehrhovey | 0:a548a085de55 | 177 | * against further PCBs and/or forwarded to another protocol layers. |
| pehrhovey | 0:a548a085de55 | 178 | * |
| pehrhovey | 0:a548a085de55 | 179 | * @return non-zero if the packet was free()d, zero if the packet remains |
| pehrhovey | 0:a548a085de55 | 180 | * available for others. |
| pehrhovey | 0:a548a085de55 | 181 | */ |
| pehrhovey | 0:a548a085de55 | 182 | void |
| pehrhovey | 0:a548a085de55 | 183 | raw_recv(struct raw_pcb *pcb, |
| pehrhovey | 0:a548a085de55 | 184 | u8_t (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p, |
| pehrhovey | 0:a548a085de55 | 185 | struct ip_addr *addr), |
| pehrhovey | 0:a548a085de55 | 186 | void *recv_arg) |
| pehrhovey | 0:a548a085de55 | 187 | { |
| pehrhovey | 0:a548a085de55 | 188 | /* remember recv() callback and user data */ |
| pehrhovey | 0:a548a085de55 | 189 | pcb->recv = recv; |
| pehrhovey | 0:a548a085de55 | 190 | pcb->recv_arg = recv_arg; |
| pehrhovey | 0:a548a085de55 | 191 | } |
| pehrhovey | 0:a548a085de55 | 192 | |
| pehrhovey | 0:a548a085de55 | 193 | /** |
| pehrhovey | 0:a548a085de55 | 194 | * Send the raw IP packet to the given address. Note that actually you cannot |
| pehrhovey | 0:a548a085de55 | 195 | * modify the IP headers (this is inconsistent with the receive callback where |
| pehrhovey | 0:a548a085de55 | 196 | * you actually get the IP headers), you can only specify the IP payload here. |
| pehrhovey | 0:a548a085de55 | 197 | * It requires some more changes in lwIP. (there will be a raw_send() function |
| pehrhovey | 0:a548a085de55 | 198 | * then.) |
| pehrhovey | 0:a548a085de55 | 199 | * |
| pehrhovey | 0:a548a085de55 | 200 | * @param pcb the raw pcb which to send |
| pehrhovey | 0:a548a085de55 | 201 | * @param p the IP payload to send |
| pehrhovey | 0:a548a085de55 | 202 | * @param ipaddr the destination address of the IP packet |
| pehrhovey | 0:a548a085de55 | 203 | * |
| pehrhovey | 0:a548a085de55 | 204 | */ |
| pehrhovey | 0:a548a085de55 | 205 | err_t |
| pehrhovey | 0:a548a085de55 | 206 | raw_sendto(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr) |
| pehrhovey | 0:a548a085de55 | 207 | { |
| pehrhovey | 0:a548a085de55 | 208 | err_t err; |
| pehrhovey | 0:a548a085de55 | 209 | struct netif *netif; |
| pehrhovey | 0:a548a085de55 | 210 | struct ip_addr *src_ip; |
| pehrhovey | 0:a548a085de55 | 211 | struct pbuf *q; /* q will be sent down the stack */ |
| pehrhovey | 0:a548a085de55 | 212 | |
| pehrhovey | 0:a548a085de55 | 213 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_sendto\n")); |
| pehrhovey | 0:a548a085de55 | 214 | |
| pehrhovey | 0:a548a085de55 | 215 | /* not enough space to add an IP header to first pbuf in given p chain? */ |
| pehrhovey | 0:a548a085de55 | 216 | if (pbuf_header(p, IP_HLEN)) { |
| pehrhovey | 0:a548a085de55 | 217 | /* allocate header in new pbuf */ |
| pehrhovey | 0:a548a085de55 | 218 | q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM); |
| pehrhovey | 0:a548a085de55 | 219 | /* new header pbuf could not be allocated? */ |
| pehrhovey | 0:a548a085de55 | 220 | if (q == NULL) { |
| pehrhovey | 0:a548a085de55 | 221 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 2, ("raw_sendto: could not allocate header\n")); |
| pehrhovey | 0:a548a085de55 | 222 | return ERR_MEM; |
| pehrhovey | 0:a548a085de55 | 223 | } |
| pehrhovey | 0:a548a085de55 | 224 | /* chain header q in front of given pbuf p */ |
| pehrhovey | 0:a548a085de55 | 225 | pbuf_chain(q, p); |
| pehrhovey | 0:a548a085de55 | 226 | /* { first pbuf q points to header pbuf } */ |
| pehrhovey | 0:a548a085de55 | 227 | LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); |
| pehrhovey | 0:a548a085de55 | 228 | } else { |
| pehrhovey | 0:a548a085de55 | 229 | /* first pbuf q equals given pbuf */ |
| pehrhovey | 0:a548a085de55 | 230 | q = p; |
| pehrhovey | 0:a548a085de55 | 231 | if(pbuf_header(q, -IP_HLEN)) { |
| pehrhovey | 0:a548a085de55 | 232 | LWIP_ASSERT("Can't restore header we just removed!", 0); |
| pehrhovey | 0:a548a085de55 | 233 | return ERR_MEM; |
| pehrhovey | 0:a548a085de55 | 234 | } |
| pehrhovey | 0:a548a085de55 | 235 | } |
| pehrhovey | 0:a548a085de55 | 236 | |
| pehrhovey | 0:a548a085de55 | 237 | if ((netif = ip_route(ipaddr)) == NULL) { |
| pehrhovey | 0:a548a085de55 | 238 | LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: No route to 0x%"X32_F"\n", ipaddr->addr)); |
| pehrhovey | 0:a548a085de55 | 239 | /* free any temporary header pbuf allocated by pbuf_header() */ |
| pehrhovey | 0:a548a085de55 | 240 | if (q != p) { |
| pehrhovey | 0:a548a085de55 | 241 | pbuf_free(q); |
| pehrhovey | 0:a548a085de55 | 242 | } |
| pehrhovey | 0:a548a085de55 | 243 | return ERR_RTE; |
| pehrhovey | 0:a548a085de55 | 244 | } |
| pehrhovey | 0:a548a085de55 | 245 | |
| pehrhovey | 0:a548a085de55 | 246 | #if IP_SOF_BROADCAST |
| pehrhovey | 0:a548a085de55 | 247 | /* broadcast filter? */ |
| pehrhovey | 0:a548a085de55 | 248 | if ( ((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif) ) { |
| pehrhovey | 0:a548a085de55 | 249 | LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb)); |
| pehrhovey | 0:a548a085de55 | 250 | /* free any temporary header pbuf allocated by pbuf_header() */ |
| pehrhovey | 0:a548a085de55 | 251 | if (q != p) { |
| pehrhovey | 0:a548a085de55 | 252 | pbuf_free(q); |
| pehrhovey | 0:a548a085de55 | 253 | } |
| pehrhovey | 0:a548a085de55 | 254 | return ERR_VAL; |
| pehrhovey | 0:a548a085de55 | 255 | } |
| pehrhovey | 0:a548a085de55 | 256 | #endif /* IP_SOF_BROADCAST */ |
| pehrhovey | 0:a548a085de55 | 257 | |
| pehrhovey | 0:a548a085de55 | 258 | if (ip_addr_isany(&pcb->local_ip)) { |
| pehrhovey | 0:a548a085de55 | 259 | /* use outgoing network interface IP address as source address */ |
| pehrhovey | 0:a548a085de55 | 260 | src_ip = &(netif->ip_addr); |
| pehrhovey | 0:a548a085de55 | 261 | } else { |
| pehrhovey | 0:a548a085de55 | 262 | /* use RAW PCB local IP address as source address */ |
| pehrhovey | 0:a548a085de55 | 263 | src_ip = &(pcb->local_ip); |
| pehrhovey | 0:a548a085de55 | 264 | } |
| pehrhovey | 0:a548a085de55 | 265 | |
| pehrhovey | 0:a548a085de55 | 266 | #if LWIP_NETIF_HWADDRHINT |
| pehrhovey | 0:a548a085de55 | 267 | netif->addr_hint = &(pcb->addr_hint); |
| pehrhovey | 0:a548a085de55 | 268 | #endif /* LWIP_NETIF_HWADDRHINT*/ |
| pehrhovey | 0:a548a085de55 | 269 | err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif); |
| pehrhovey | 0:a548a085de55 | 270 | #if LWIP_NETIF_HWADDRHINT |
| pehrhovey | 0:a548a085de55 | 271 | netif->addr_hint = NULL; |
| pehrhovey | 0:a548a085de55 | 272 | #endif /* LWIP_NETIF_HWADDRHINT*/ |
| pehrhovey | 0:a548a085de55 | 273 | |
| pehrhovey | 0:a548a085de55 | 274 | /* did we chain a header earlier? */ |
| pehrhovey | 0:a548a085de55 | 275 | if (q != p) { |
| pehrhovey | 0:a548a085de55 | 276 | /* free the header */ |
| pehrhovey | 0:a548a085de55 | 277 | pbuf_free(q); |
| pehrhovey | 0:a548a085de55 | 278 | } |
| pehrhovey | 0:a548a085de55 | 279 | return err; |
| pehrhovey | 0:a548a085de55 | 280 | } |
| pehrhovey | 0:a548a085de55 | 281 | |
| pehrhovey | 0:a548a085de55 | 282 | /** |
| pehrhovey | 0:a548a085de55 | 283 | * Send the raw IP packet to the address given by raw_connect() |
| pehrhovey | 0:a548a085de55 | 284 | * |
| pehrhovey | 0:a548a085de55 | 285 | * @param pcb the raw pcb which to send |
| pehrhovey | 0:a548a085de55 | 286 | * @param p the IP payload to send |
| pehrhovey | 0:a548a085de55 | 287 | * |
| pehrhovey | 0:a548a085de55 | 288 | */ |
| pehrhovey | 0:a548a085de55 | 289 | err_t |
| pehrhovey | 0:a548a085de55 | 290 | raw_send(struct raw_pcb *pcb, struct pbuf *p) |
| pehrhovey | 0:a548a085de55 | 291 | { |
| pehrhovey | 0:a548a085de55 | 292 | return raw_sendto(pcb, p, &pcb->remote_ip); |
| pehrhovey | 0:a548a085de55 | 293 | } |
| pehrhovey | 0:a548a085de55 | 294 | |
| pehrhovey | 0:a548a085de55 | 295 | /** |
| pehrhovey | 0:a548a085de55 | 296 | * Remove an RAW PCB. |
| pehrhovey | 0:a548a085de55 | 297 | * |
| pehrhovey | 0:a548a085de55 | 298 | * @param pcb RAW PCB to be removed. The PCB is removed from the list of |
| pehrhovey | 0:a548a085de55 | 299 | * RAW PCB's and the data structure is freed from memory. |
| pehrhovey | 0:a548a085de55 | 300 | * |
| pehrhovey | 0:a548a085de55 | 301 | * @see raw_new() |
| pehrhovey | 0:a548a085de55 | 302 | */ |
| pehrhovey | 0:a548a085de55 | 303 | void |
| pehrhovey | 0:a548a085de55 | 304 | raw_remove(struct raw_pcb *pcb) |
| pehrhovey | 0:a548a085de55 | 305 | { |
| pehrhovey | 0:a548a085de55 | 306 | struct raw_pcb *pcb2; |
| pehrhovey | 0:a548a085de55 | 307 | /* pcb to be removed is first in list? */ |
| pehrhovey | 0:a548a085de55 | 308 | if (raw_pcbs == pcb) { |
| pehrhovey | 0:a548a085de55 | 309 | /* make list start at 2nd pcb */ |
| pehrhovey | 0:a548a085de55 | 310 | raw_pcbs = raw_pcbs->next; |
| pehrhovey | 0:a548a085de55 | 311 | /* pcb not 1st in list */ |
| pehrhovey | 0:a548a085de55 | 312 | } else { |
| pehrhovey | 0:a548a085de55 | 313 | for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { |
| pehrhovey | 0:a548a085de55 | 314 | /* find pcb in raw_pcbs list */ |
| pehrhovey | 0:a548a085de55 | 315 | if (pcb2->next != NULL && pcb2->next == pcb) { |
| pehrhovey | 0:a548a085de55 | 316 | /* remove pcb from list */ |
| pehrhovey | 0:a548a085de55 | 317 | pcb2->next = pcb->next; |
| pehrhovey | 0:a548a085de55 | 318 | } |
| pehrhovey | 0:a548a085de55 | 319 | } |
| pehrhovey | 0:a548a085de55 | 320 | } |
| pehrhovey | 0:a548a085de55 | 321 | memp_free(MEMP_RAW_PCB, pcb); |
| pehrhovey | 0:a548a085de55 | 322 | } |
| pehrhovey | 0:a548a085de55 | 323 | |
| pehrhovey | 0:a548a085de55 | 324 | /** |
| pehrhovey | 0:a548a085de55 | 325 | * Create a RAW PCB. |
| pehrhovey | 0:a548a085de55 | 326 | * |
| pehrhovey | 0:a548a085de55 | 327 | * @return The RAW PCB which was created. NULL if the PCB data structure |
| pehrhovey | 0:a548a085de55 | 328 | * could not be allocated. |
| pehrhovey | 0:a548a085de55 | 329 | * |
| pehrhovey | 0:a548a085de55 | 330 | * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP) |
| pehrhovey | 0:a548a085de55 | 331 | * |
| pehrhovey | 0:a548a085de55 | 332 | * @see raw_remove() |
| pehrhovey | 0:a548a085de55 | 333 | */ |
| pehrhovey | 0:a548a085de55 | 334 | struct raw_pcb * |
| pehrhovey | 0:a548a085de55 | 335 | raw_new(u8_t proto) { |
| pehrhovey | 0:a548a085de55 | 336 | struct raw_pcb *pcb; |
| pehrhovey | 0:a548a085de55 | 337 | |
| pehrhovey | 0:a548a085de55 | 338 | LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_new\n")); |
| pehrhovey | 0:a548a085de55 | 339 | |
| pehrhovey | 0:a548a085de55 | 340 | pcb = memp_malloc(MEMP_RAW_PCB); |
| pehrhovey | 0:a548a085de55 | 341 | /* could allocate RAW PCB? */ |
| pehrhovey | 0:a548a085de55 | 342 | if (pcb != NULL) { |
| pehrhovey | 0:a548a085de55 | 343 | /* initialize PCB to all zeroes */ |
| pehrhovey | 0:a548a085de55 | 344 | memset(pcb, 0, sizeof(struct raw_pcb)); |
| pehrhovey | 0:a548a085de55 | 345 | pcb->protocol = proto; |
| pehrhovey | 0:a548a085de55 | 346 | pcb->ttl = RAW_TTL; |
| pehrhovey | 0:a548a085de55 | 347 | pcb->next = raw_pcbs; |
| pehrhovey | 0:a548a085de55 | 348 | raw_pcbs = pcb; |
| pehrhovey | 0:a548a085de55 | 349 | } |
| pehrhovey | 0:a548a085de55 | 350 | return pcb; |
| pehrhovey | 0:a548a085de55 | 351 | } |
| pehrhovey | 0:a548a085de55 | 352 | |
| pehrhovey | 0:a548a085de55 | 353 | #endif /* LWIP_RAW */ |