/* * Copyright (c) 2007, Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file is part of the Contiki operating system. * * Author: Oliver Schmidt * * $Id: wpcap.c,v 1.6 2007/04/11 00:21:28 oliverschmidt Exp $ */ #define WIN32_LEAN_AND_MEAN #define _WIN32_WINNT 0x0501 #include #include #include #include #include #include /* Avoid 'conflicting types' errors. */ #define htonl #define htons #include "contiki-net.h" #include "sys/log.h" #include "wpcap.h" #ifdef __CYGWIN__ __attribute__((dllimport)) extern char **__argv[]; #endif struct pcap; struct pcap_if { struct pcap_if *next; char *name; char *description; struct pcap_addr { struct pcap_addr *next; struct sockaddr *addr; struct sockaddr *netmask; struct sockaddr *broadaddr; struct sockaddr *dstaddr; } *addresses; DWORD flags; }; struct pcap_pkthdr { struct timeval ts; DWORD caplen; DWORD len; }; static struct pcap *pcap; static int (* pcap_findalldevs)(struct pcap_if **, char *); static struct pcap *(* pcap_open_live)(char *, int, int, int, char *); static int (* pcap_next_ex)(struct pcap *, struct pcap_pkthdr **, unsigned char **); static int (* pcap_sendpacket)(struct pcap *, unsigned char *, int); #define BUF ((struct uip_eth_hdr *)&uip_buf[0]) /*---------------------------------------------------------------------------*/ static void error_exit(char *message) { printf("error_exit: %s", message); exit(EXIT_FAILURE); } /*---------------------------------------------------------------------------*/ static void init_pcap(struct in_addr addr) { struct pcap_if *interfaces; char error[256]; if(pcap_findalldevs(&interfaces, error) == -1) { error_exit(error); } while(interfaces != NULL) { log_message("init_pcap: found interface: ", interfaces->description); if(interfaces->addresses != NULL && interfaces->addresses->addr != NULL && interfaces->addresses->addr->sa_family == AF_INET) { struct in_addr interface_addr; interface_addr = ((struct sockaddr_in *)interfaces->addresses->addr)->sin_addr; log_message("init_pcap: with address: ", inet_ntoa(interface_addr)); if(interface_addr.s_addr == addr.s_addr) { break; } } interfaces = interfaces->next; } if(interfaces == NULL) { error_exit("no interface found with ip addr specified on cmdline\n"); } pcap = pcap_open_live(interfaces->name, UIP_BUFSIZE, 0, -1, error); if(pcap == NULL) { error_exit(error); } } /*---------------------------------------------------------------------------*/ static void set_ethaddr(struct in_addr addr) { PIP_ADAPTER_ADDRESSES adapters; ULONG size = 0; if(GetAdaptersAddresses(AF_INET, GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER, NULL, NULL, &size) != ERROR_BUFFER_OVERFLOW) { error_exit("error on access to adapter list size\n"); } adapters = alloca(size); if(GetAdaptersAddresses(AF_INET, GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER, NULL, adapters, &size) != ERROR_SUCCESS) { error_exit("error on access to adapter list\n"); } while(adapters != NULL) { char buffer[256]; WideCharToMultiByte(CP_ACP, 0, adapters->Description, -1, buffer, sizeof(buffer), NULL, NULL); log_message("set_ethaddr: found adapter: ", buffer); if(adapters->FirstUnicastAddress != NULL && adapters->FirstUnicastAddress->Address.lpSockaddr != NULL && adapters->FirstUnicastAddress->Address.lpSockaddr->sa_family == AF_INET) { struct in_addr adapter_addr; adapter_addr = ((struct sockaddr_in *)adapters->FirstUnicastAddress->Address.lpSockaddr)->sin_addr; log_message("set_ethaddr: with address: ", inet_ntoa(adapter_addr)); if(adapter_addr.s_addr == addr.s_addr) { if(adapters->PhysicalAddressLength != 6) { error_exit("ip addr specified on cmdline does not belong to an ethernet card\n"); } wsprintf(buffer, "%02X-%02X-%02X-%02X-%02X-%02X", adapters->PhysicalAddress[0], adapters->PhysicalAddress[1], adapters->PhysicalAddress[2], adapters->PhysicalAddress[3], adapters->PhysicalAddress[4], adapters->PhysicalAddress[5]); log_message("set_ethaddr: ethernetaddr: ", buffer); uip_setethaddr((*(struct uip_eth_addr *)adapters->PhysicalAddress)); break; } } adapters = adapters->Next; } if(adapters == NULL) { error_exit("no adapter found with ip addr specified on cmdline\n"); } } /*---------------------------------------------------------------------------*/ void wpcap_init(void) { struct in_addr addr; HMODULE wpcap; #ifdef __CYGWIN__ addr.s_addr = inet_addr((*__argv)[1]); #else addr.s_addr = inet_addr(__argv[1]); #endif if(addr.s_addr == INADDR_NONE) { error_exit("usage: \n"); } log_message("wpcap_init: cmdline address: ", inet_ntoa(addr)); wpcap = LoadLibrary("wpcap.dll"); (FARPROC)pcap_findalldevs = GetProcAddress(wpcap, "pcap_findalldevs"); (FARPROC)pcap_open_live = GetProcAddress(wpcap, "pcap_open_live"); (FARPROC)pcap_next_ex = GetProcAddress(wpcap, "pcap_next_ex"); (FARPROC)pcap_sendpacket = GetProcAddress(wpcap, "pcap_sendpacket"); if(pcap_findalldevs == NULL || pcap_open_live == NULL || pcap_next_ex == NULL || pcap_sendpacket == NULL) { error_exit("error on access to winpcap library\n"); } init_pcap(addr); set_ethaddr(addr); } /*---------------------------------------------------------------------------*/ u16_t wpcap_poll(void) { struct pcap_pkthdr *packet_header; unsigned char *packet; switch(pcap_next_ex(pcap, &packet_header, &packet)) { case -1: error_exit("error on poll\n"); case 0: return 0; } if(packet_header->caplen > UIP_BUFSIZE) { return 0; } CopyMemory(uip_buf, packet, packet_header->caplen); return (u16_t)packet_header->caplen; } /*---------------------------------------------------------------------------*/ void wpcap_send(void) { if(pcap_sendpacket(pcap, uip_buf, uip_len) == -1) { error_exit("error on send\n"); } } /*---------------------------------------------------------------------------*/