我正在为运行Debian 7.1的Linux设备上的boost,C ++,Codeblocks编写网关(也就是路由器)的代码。我遇到了恼人的提升绑定错误,我根本无法弄清楚问题是什么。在开始创建线程之前,我已经能够打印出MAC头
这是我的代码:
#include <errno.h>
#include <sys/ioctl.h>
#include <boost/thread.hpp>
#include <boost/function.hpp>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <iostream>
#include <features.h>
#include <stdlib.h>
using namespace std;
int CreateRawSocket(int protocol_to_sniff)
{
int s;
if((s = socket(AF_PACKET, SOCK_RAW, htons(protocol_to_sniff))) == -1)
{
perror("Error creating raw socket");
exit(-1);
}
return s;
}
int BindRawSocketToInterface(char *device, int raw, int protocol)
{
struct sockaddr_ll sll;
struct ifreq ifr;
bzero(&sll, sizeof(sll));
bzero(&ifr, sizeof(ifr));
strncpy((char *)ifr.ifr_name, device, IFNAMSIZ);
if((ioctl(raw, SIOCGIFINDEX, &ifr)) == -1)
{
printf("Error getting interface index!\n");
exit(-1);
}
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll.sll_protocol = htons(protocol);
if((bind(raw, (struct sockaddr *)&sll, sizeof(sll))) == -1)
{
perror("Error binding raw socket to interface\n");
exit(-1);
}
return 1;
}
int rawpacket_recv(int s, unsigned char *packet, int length)
{
int to_recv = 0;
to_recv = read(s, packet, length);
if(to_recv == -1)
{
perror("Error receiving packet");
exit(-1);
}
return to_recv;
}
int PrintPacketMACHdr(unsigned char *eth_packet)
{
unsigned char *ethhead;
int j;
ethhead = eth_packet;
printf("---Start of Ethernet header---");
printf("\nDestination address:\n");
for(j = 0; j < 6; j++)
{
printf("%02x:", *(ethhead+j)); //destination address (0 to 6 bit)
}
printf("\nSource address:\n");
for(j = 6; j < 12; j++)
{
printf("%02x:", *(ethhead+j)); //source address
}
printf("\nEther protocol number:\n");
for(j = 12; j < 14; j++)
{
printf("%02x", *(ethhead+j)); //protocol number
}
printf("\n---End of Ethernet header---\n");
if(*(ethhead + 12) == 8 && *(ethhead + 13) == 0)
{
return 1; //IP packet
}
if(*(ethhead + 12) == 8 && *(ethhead + 13) == 6)
{
return 2; //ARP packet
}
return 0;
}
int CreateAndBindSocket(int protocol_to_sniff, int *socket, char *interface)
{
int ethSocket = *socket; //eth1recv;
ethSocket = CreateRawSocket(protocol_to_sniff);
BindRawSocketToInterface(interface, ethSocket, ETH_P_ALL);
return ethSocket;
}
void RecvThread(int *socket) //thread function for receiving packets
{
int counter;
unsigned char *eth_buffer;
int eth_receiver;
int eth_socket = *socket
eth_buffer = (unsigned char *)malloc(ETH_P_ALL);
eth_receiver = rawpacket_recv(eth_socket, eth_buffer, ETH_P_ALL);
for(;;)
{
cout << "thread iteration " << ++counter << " Press Enter to stop" << endl;
try
{
//Sleep and check for interrupt();
//boost::this_thread::sleep(boost::posix_time::milliseconds(500));
usleep(50000);
PrintPacketMACHdr(eth_buffer);
}
catch(boost::thread_interrupted&)
{
cout << "Thread is stopped" << endl;
return;
}
}
}
int main(int argc, char **argv)
{
int eth0socket, eth1socket;
char eth0[] = "eth0";
char eth1[] = "eth1";
eth0socket = CreateAndBindSocket(ETH_P_ALL, ð0socket, eth0);
eth1socket = CreateAndBindSocket(ETH_P_ALL, ð1socket, eth1);
boost::thread eth0recvthread(RecvThread, ð0socket); //instantiate thread in main
char ch;
cin.get(ch);
eth0recvthread.interrupt();
eth0recvthread.join();
return 0;
}
现在我正在尝试创建一个侦听其中一个套接字的线程,并且(现在)打印以太网帧的MAC头。稍后我将不得不将数据包保存在某种数组中,然后创建另一个处理此数组中数据包的线程。但正如标题所说,我得到一个提升错误:
/home/thomas/Workspace/minisniffer/main.cpp||In function ‘void RecvThread(int)’:|
/home/thomas/Workspace/minisniffer/main.cpp|181|warning: variable ‘eth_receiver’ set but not used [-Wunused-but-set-variable]|
../../../../usr/local/boost_1_54_0/boost/bind/bind_template.hpp|20| required from ‘boost::_bi::bind_t<R, F, L>::result_type boost::_bi::bind_t<R, F, L>::operator()() [with R = void; F = void (*)(int); L = boost::_bi::list1<boost::_bi::value<int*> >; boost::_bi::bind_t<R, F, L>::result_type = void]’|
../../../../usr/local/boost_1_54_0/boost/thread/detail/thread.hpp|117| required from ‘void boost::detail::thread_data<F>::run() [with F = boost::_bi::bind_t<void, void (*)(int), boost::_bi::list1<boost::_bi::value<int*> > >]’|
/home/thomas/Workspace/minisniffer/main.cpp|306| required from here|
../../../../usr/local/boost_1_54_0/boost/bind/bind.hpp|253|error: invalid conversion from ‘int*’ to ‘int’ [-fpermissive]|
../../../../usr/local/boost_1_54_0/boost/system/error_code.hpp|222|warning: ‘boost::system::posix_category’ defined but not used [-Wunused-variable]|
../../../../usr/local/boost_1_54_0/boost/system/error_code.hpp|223|warning: ‘boost::system::errno_ecat’ defined but not used [-Wunused-variable]|
../../../../usr/local/boost_1_54_0/boost/system/error_code.hpp|224|warning: ‘boost::system::native_ecat’ defined but not used [-Wunused-variable]|
||=== Build finished: 4 errors, 4 warnings ===|
Tbh我不知道失败了什么,但是我再次对C ++和Boost很陌生。
套接字的创建和绑定工作得很好,因为它们已经过测试,但线程函数RecvThread()是让我失望的。
如果有人知道我做错了什么(可能很容易成为指针(*)或地址(&amp;)弄乱了一切)我会非常感激!!
提前致谢!