180 lines
6 KiB
C
180 lines
6 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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#include "contiki-net.h"
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#include "net/uip-neighbor.h"
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#include "net/wpcap.h"
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#include "net/wpcap-drv.h"
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#include <string.h>
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#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
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#define IPBUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
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/* It is not particularly easy to install tun interfaces in Windows/cygwin, so wpcap
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* is used instead. The ip4 or ip6 address of the interface to connect to is passed
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* on the command line that invokes the minimal-net and native executables.
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*
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* The minimal-net border router uses wpcap to connect to both primary
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* and fallback interfaces. It is passed two addresses, and the uip stack is compiled
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* with space for the ethernet headers on both interfaces.
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*
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* However the native border router uses wpcap to connect to a fallback interface only.
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* The primary interface is the serial connection to the slip radio, and the
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* uip stack is compiled without space for ethernet headers.
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* The following define adds or strips ethernet headers from the fallback interface.
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* Since it is at present used only with the native border router, it is also used
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* as a hack to bypass polling of the primary interface.
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*
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* SELECT_CALLBACK is defined in /examples/ipv6/native-border-router/project-conf.h
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*/
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#ifdef SELECT_CALLBACK
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#define FALLBACK_HAS_ETHERNET_HEADERS 1
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#endif
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PROCESS(wpcap_process, "WinPcap driver");
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/*---------------------------------------------------------------------------*/
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#if !UIP_CONF_IPV6
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uint8_t
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wpcap_output(void)
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{
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uip_arp_out();
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wpcap_send();
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return 0;
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}
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#endif /* !UIP_CONF_IPV6 */
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/*---------------------------------------------------------------------------*/
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static void
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pollhandler(void)
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{
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#if !FALLBACK_HAS_ETHERNET_HEADERS //native br is fallback only
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process_poll(&wpcap_process);
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uip_len = wpcap_poll();
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if(uip_len > 0) {
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#if UIP_CONF_IPV6
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if(BUF->type == uip_htons(UIP_ETHTYPE_IPV6)) {
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// printf("wpcap poll calls tcpip");
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tcpip_input();
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} else
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#endif /* UIP_CONF_IPV6 */
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if(BUF->type == uip_htons(UIP_ETHTYPE_IP)) {
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uip_len -= sizeof(struct uip_eth_hdr);
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tcpip_input();
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#if !UIP_CONF_IPV6
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} else if(BUF->type == uip_htons(UIP_ETHTYPE_ARP)) {
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uip_arp_arpin(); //math
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/* If the above function invocation resulted in data that
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should be sent out on the network, the global variable
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uip_len is set to a value > 0. */
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if(uip_len > 0) {
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wpcap_send();
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}
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#endif /* !UIP_CONF_IPV6 */
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} else {
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uip_len = 0;
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}
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}
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#endif
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#ifdef UIP_FALLBACK_INTERFACE
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process_poll(&wpcap_process);
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uip_len = wfall_poll();
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if(uip_len > 0) {
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#if FALLBACK_HAS_ETHERNET_HEADERS
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if(BUF->type == uip_htons(UIP_ETHTYPE_IPV6)) {
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//remove ethernet header and pass ipv6 packet to stack
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uip_len-=14;
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//{int i;printf("\n0000 ");for (i=0;i<uip_len;i++) printf("%02x ",*(unsigned char*)(uip_buf+i));printf("\n");}
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// memcpy(uip_buf, uip_buf+14, uip_len);
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memcpy(&uip_buf[UIP_LLH_LEN], uip_buf+14, uip_len); //LLH_LEN is zero for native border router to slip radio
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// CopyMemory(uip_buf, uip_buf+14, uip_len);
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//{int i;printf("\n0000 ");for (i=0;i<uip_len;i++) printf("%02x ",*(char*)(uip_buf+i));printf("\n");}
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tcpip_input();
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} else
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goto bail;
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#elif UIP_CONF_IPV6
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if(BUF->type == uip_htons(UIP_ETHTYPE_IPV6)) {
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tcpip_input();
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} else
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goto bail;
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#endif /* UIP_CONF_IPV6 */
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if(BUF->type == uip_htons(UIP_ETHTYPE_IP)) {
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uip_len -= sizeof(struct uip_eth_hdr);
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tcpip_input();
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#if !UIP_CONF_IPV6
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} else if(BUF->type == uip_htons(UIP_ETHTYPE_ARP)) {
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uip_arp_arpin(); //math
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/* If the above function invocation resulted in data that
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should be sent out on the network, the global variable
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uip_len is set to a value > 0. */
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if(uip_len > 0) {
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wfall_send();
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}
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#endif /* !UIP_CONF_IPV6 */
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} else {
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bail:
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uip_len = 0;
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}
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}
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#endif
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(wpcap_process, ev, data)
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{
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PROCESS_POLLHANDLER(pollhandler());
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PROCESS_BEGIN();
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wpcap_init();
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#if !UIP_CONF_IPV6
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tcpip_set_outputfunc(wpcap_output);
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#else
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#if !FALLBACK_HAS_ETHERNET_HEADERS
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tcpip_set_outputfunc(wpcap_send);
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#endif
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#endif /* !UIP_CONF_IPV6 */
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process_poll(&wpcap_process);
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PROCESS_WAIT_UNTIL(ev == PROCESS_EVENT_EXIT);
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wpcap_exit();
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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