/* * 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 1.18 2009/08/13 18:41:00 dak664 Exp $ */ #define WIN32_LEAN_AND_MEAN #define _WIN32_WINNT 0x0501 #include #include #include #include #include #ifdef __CYGWIN__ #include #else /* __CYGWIN__ */ #include #endif /* __CYGWIN__ */ #define DEBUG 0 #if DEBUG #define PRINTF(...) printf(__VA_ARGS__) #else #define PRINTF(...) #endif /* Avoid 'conflicting types' errors. */ #define htonl #define htons #include "contiki-net.h" #include "sys/log.h" #include "net/wpcap.h" #ifdef __CYGWIN__ __attribute__((dllimport)) extern char **__argv[]; #endif /* __CYGWIN__ */ 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; }; HMODULE wpcap; static struct pcap *pcap; /* uip_ethaddr is defined in uip.c. It is not used in uip6.c. * If needed for some purpose it can be defined here */ #if UIP_CONF_IPV6 //struct uip_eth_addr uip_ethaddr; #endif 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]) #define IPBUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN]) /*---------------------------------------------------------------------------*/ 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; struct pcap_addr *paddr; 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) { for(paddr = interfaces->addresses; paddr != NULL; paddr = paddr->next) { if(paddr->addr != NULL && paddr->addr->sa_family == AF_INET) { struct in_addr interface_addr; interface_addr = ((struct sockaddr_in *)paddr->addr)->sin_addr; log_message("init_pcap: with address: ", inet_ntoa(interface_addr)); if(interface_addr.s_addr == addr.s_addr) { pcap = pcap_open_live(interfaces->name, UIP_BUFSIZE, 0, -1, error); if(pcap == NULL) { error_exit(error); } // pcap_setdirection(PCAP_D_IN); //Not implemented in windows yet? return; } } } } interfaces = interfaces->next; } if(interfaces == NULL) { error_exit("no interface found with specified ip address\n"); } } /*---------------------------------------------------------------------------*/ 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); #if UIP_CONF_IPV6 // int i;for (i=0;i<6;i++) uip_ethaddr.addr[i] = adapters->PhysicalAddress[i]; #else uip_setethaddr((*(struct uip_eth_addr *)adapters->PhysicalAddress)); #endif 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; #ifdef __CYGWIN__ addr.s_addr = inet_addr((*__argv)[1]); #else /* __CYGWIN__ */ addr.s_addr = inet_addr(__argv[1]); #endif /* __CYGWIN__ */ if(addr.s_addr == INADDR_NONE) { // error_exit("usage: \n"); addr.s_addr = inet_addr("10.10.10.10"); log_message("usage: \n-->I'll try guessing ", inet_ntoa(addr)); } else { log_message("wpcap_init:cmdline address: ", inet_ntoa(addr)); } wpcap = LoadLibrary("wpcap.dll"); pcap_findalldevs = (int (*)(struct pcap_if **, char *)) GetProcAddress(wpcap, "pcap_findalldevs"); pcap_open_live = (struct pcap *(*)(char *, int, int, int, char *)) GetProcAddress(wpcap, "pcap_open_live"); pcap_next_ex = (int (*)(struct pcap *, struct pcap_pkthdr **, unsigned char **)) GetProcAddress(wpcap, "pcap_next_ex"); pcap_sendpacket = (int (*)(struct pcap *, unsigned char *, int)) 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 UIP_CONF_IPV6 /* Since pcap_setdirection(PCAP_D_IN) is not implemented in winpcap all outgoing packets * will be echoed back. The stack will ignore any packets not addressed to it, but initial * ipv6 neighbor solicitations are addressed to everyone and the echoed NS sent on startup * would be processed as a conflicting NS race which would cause a stack shutdown. * So discard all packets with our source address (packet starts destaddr, srcaddr, ...) * */ int i; for (i=0;icaplen > UIP_BUFSIZE) { return 0; } CopyMemory(uip_buf, packet, packet_header->caplen); return (u16_t)packet_header->caplen; } /*---------------------------------------------------------------------------*/ #if UIP_CONF_IPV6 u8_t wpcap_send(uip_lladdr_t *lladdr) { if(lladdr == NULL) { /* the dest must be multicast*/ (&BUF->dest)->addr[0] = 0x33; (&BUF->dest)->addr[1] = 0x33; (&BUF->dest)->addr[2] = IPBUF->destipaddr.u8[12]; (&BUF->dest)->addr[3] = IPBUF->destipaddr.u8[13]; (&BUF->dest)->addr[4] = IPBUF->destipaddr.u8[14]; (&BUF->dest)->addr[5] = IPBUF->destipaddr.u8[15]; } else { memcpy(&BUF->dest, lladdr, UIP_LLADDR_LEN); } memcpy(&BUF->src, &uip_lladdr, UIP_LLADDR_LEN); PRINTF("Src= %02x %02x %02x %02x %02x %02x",(&BUF->src)->addr[0],(&BUF->src)->addr[1],(&BUF->src)->addr[2],(&BUF->src)->addr[3],(&BUF->src)->addr[4],(&BUF->src)->addr[5]); PRINTF(" Dst= %02x %02x %02x %02x %02x %02x",(&BUF->dest)->addr[0],(&BUF->dest)->addr[1],(&BUF->dest)->addr[2],(&BUF->dest)->addr[3],(&BUF->dest)->addr[4],(&BUF->dest)->addr[5]); PRINTF(" Type=%04x\n",BUF->type); BUF->type = HTONS(UIP_ETHTYPE_IPV6); uip_len += sizeof(struct uip_eth_hdr); if(pcap_sendpacket(pcap, uip_buf, uip_len) == -1) { error_exit("error on send\n"); } return 0; } #else /* UIP_CONF_IPV6 */ void wpcap_send(void) { /* if(rand() % 1000 > 900) { printf("Drop\n"); return; } else { printf("Send\n"); }*/ if(pcap_sendpacket(pcap, uip_buf, uip_len) == -1) { error_exit("error on send\n"); } } #endif /* UIP_CONF_IPV6 */ /*---------------------------------------------------------------------------*/ void wpcap_exit(void) { FreeLibrary(wpcap); } /*---------------------------------------------------------------------------*/