/*
* Copyright (c) 2006, 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 <ol.sc@web.de>
*
* $Id: wpcap-service.c,v 1.4 2006/10/06 22:39:31 oliverschmidt Exp $
*/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winsock2.h>
#include <iphlpapi.h>
#include <stdlib.h>
#include <malloc.h>
#pragma comment(lib, "wsock32")
#pragma comment(lib, "iphlpapi.lib")
#define htons /* Avoid 'redefinition' error. */
#include "contiki.h"
#include "contiki-net.h"
void send_packet(void);
SERVICE(wpcap_service, packet_service, { (u8_t (*)(void))send_packet });
PROCESS(wpcap_service_process, "WinPcap driver");
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;
unsigned __int32 flags;
};
struct pcap_pkthdr {
struct timeval ts;
unsigned __int32 caplen;
unsigned __int32 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
pollhandler(void)
{
struct pcap_pkthdr *packet_header;
unsigned char *packet;
process_poll(&wpcap_service_process);
switch(pcap_next_ex(pcap, &packet_header, &packet)) {
case -1:
error_exit("Error on poll\n");
case 0:
return;
}
uip_len = packet_header->caplen;
CopyMemory(uip_buf, packet, uip_len);
if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
debug_printf("I");
uip_len -= sizeof(struct uip_eth_hdr);
tcpip_input();
} else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
debug_printf("A");
uip_arp_arpin();
if(uip_len > 0) {
if(pcap_sendpacket(pcap, uip_buf, uip_len) == -1) {
error_exit("Error on ARP response\n");
}
}
}
}
/*---------------------------------------------------------------------------*/
static void
send_packet(void)
{
uip_arp_out();
if(pcap_sendpacket(pcap, uip_buf, uip_len) == -1) {
error_exit("Error on send\n");
}
}
/*---------------------------------------------------------------------------*/
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) {
debug_printf("Found interface: %s\n", 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;
debug_printf(" With address: %s\n", 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 description[256];
WideCharToMultiByte(CP_ACP, 0, adapters->Description, -1,
description, sizeof(description), NULL, NULL);
debug_printf("Found adapter: %s\n", description);
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;
debug_printf(" With address: %s\n", 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");
}
debug_printf(" Ethernetaddr: %02X-%02X-%02X-%02X-%02X-%02X\n",
adapters->PhysicalAddress[0],
adapters->PhysicalAddress[1],
adapters->PhysicalAddress[2],
adapters->PhysicalAddress[3],
adapters->PhysicalAddress[4],
adapters->PhysicalAddress[5]);
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");
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(wpcap_service_process, ev, data)
{
static struct in_addr addr;
static HMODULE wpcap;
PROCESS_POLLHANDLER(pollhandler());
PROCESS_BEGIN();
addr.s_addr = inet_addr(__argv[1]);
if(addr.s_addr == INADDR_NONE) {
error_exit("Usage: contiki <IP addr of Ethernet card to share>\n");
}
debug_printf("Cmdline address: %s\n", 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);
uip_arp_init();
SERVICE_REGISTER(wpcap_service);
process_poll(&wpcap_service_process);
PROCESS_WAIT_EVENT_UNTIL(ev == PROCESS_EVENT_EXIT ||
ev == PROCESS_EVENT_SERVICE_REMOVED);
SERVICE_REMOVE(wpcap_service);
FreeLibrary(wpcap);
PROCESS_END();
}
/*---------------------------------------------------------------------------*/