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socket_raw.cpp
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socket_raw.cpp
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#include <netinet/ip_icmp.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>//recvfrom;
#include <unistd.h>//alarm
#include <stdio.h>
#include <exception>
#include "test_log.h"
#include "socket_raw.h"
#include "recv_timeout.h"
extern int errno;
extern int goalarm;
const int BUF_SIZE = 1024;
CSocketRaw::CSocketRaw(int protocol,int af)
{
if (af == -1)
{
//据说,可以是PF_PACKET;
af = AF_INET;
}
sockfd = socket(af,SOCK_RAW,protocol);
if (sockfd < 0)
{
char buf[BUF_SIZE] = {0};
snprintf(buf,BUF_SIZE,"socket[protocol=%d] failed;errno[%d]:%s!\n",protocol,errno,strerror(errno));
PRINT(buf);
throw std::exception();
return ;
}
}
CSocketRaw::~CSocketRaw()
{
close(sockfd);
}
int CSocketRaw::recv_from_poll(char *buf,int len,int timeout)
{
if (!recv_timeout(sockfd,timeout))
{
return -1;
}
int sz = recvfrom(sockfd,buf,len,0,0,0);
if (sz < 0)
{
char buf[BUF_SIZE] = {0};
snprintf(buf,BUF_SIZE,"recvfrom error[%d] : %s!\n",errno,strerror(errno));
printf(buf);
return sz;
}
return sz;
}
int CSocketRaw::recv_from_alarm(char *buf,int len,int timeout)
{
int sz = 0;
alarm(timeout);
again:
sz = recvfrom(sockfd,buf,len,0,0,0);
if (sz < 0)
{
if (goalarm == 1)
{
return -1;
}
if (errno == EINTR)
{
//goto again;
//这里就不注册中断函数了,所以中断直接返回失败.
}
//#ifdef _MY_TEST_
char buf[BUF_SIZE] = {0};
snprintf(buf,BUF_SIZE,"recvfrom error[%d] : %s!\n",errno,strerror(errno));
printf(buf);
//#endif//_MY_TEST_
return sz;
}
return sz;
}
int CSocketRaw::send_to(char *buf,int len)
{
int sz = 0;
again :
sz = sendto(sockfd,buf,len,0,0,0);
if (sz < 0)
{
if (errno == EINTR)
{
//goto again;
//这里就不注册中断函数了,所以中断直接返回失败.
}
char buf[BUF_SIZE] = {0};
snprintf(buf,BUF_SIZE,"recvfrom error[%d] : %s!\n",errno,strerror(errno));
PRINT(buf);
return sz;
}
return sz;
}