在写一个程序可以进行ping和trace,程序中ping和trace分别使用一个线程实现,现在遇到一个问题,比如同时ping 和trace 百度时,ping和trace接收的包就有问题,而这两个线程单独进行时就正常,程序框架如下:ping:(m_hSocket是在线程内创建的局部变量)
m_hSocket = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
setsockopt设置超时缓冲区等属性
创建ICMP报文
sendto(m_hSocket, m_pIcmpData, m_nDataSize, 0, (struct sockaddr *)&m_addrDest, sizeof(m_addrDest));
recvfrom(m_hSocket, m_pRecvBuf, MAX_PACKET, 0, (struct sockaddr *)&m_addrFrom, &fromlen);
解析报文trace和ping类似,只是在sendto之前对报文设置了TTL值每发一次从1开始增加。
setsockopt(m_hSocket, IPPROTO_IP, IP_TTL, (char*)&m_TTL, sizeof(m_TTL));跪求指点!
m_hSocket = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
setsockopt设置超时缓冲区等属性
创建ICMP报文
sendto(m_hSocket, m_pIcmpData, m_nDataSize, 0, (struct sockaddr *)&m_addrDest, sizeof(m_addrDest));
recvfrom(m_hSocket, m_pRecvBuf, MAX_PACKET, 0, (struct sockaddr *)&m_addrFrom, &fromlen);
解析报文trace和ping类似,只是在sendto之前对报文设置了TTL值每发一次从1开始增加。
setsockopt(m_hSocket, IPPROTO_IP, IP_TTL, (char*)&m_TTL, sizeof(m_TTL));跪求指点!
#include <stdio.h>
#include <string.h>
char YN(int k) {
FILE *f;
char fn[40];
char ln[80];
char yn;
int n; yn='N';
sprintf(fn,"d:\\ping%d.txt",k);
f=fopen(fn,"r");
if (NULL!=f) {
n=0;
while (1) {
if (NULL==fgets(ln,80,f)) break;//
if (strstr(ln,"ms ")) {
yn='Y';
break;//
}
n++;
if (n>=4) break;//
}
fclose(f);
}
return yn;
}
void main(int argc,char **argv) {
char cmdstr[256];
int i;
int IP[3];
char c; if (argc<2) {
USAGE:
printf("Usage example:\n %s 192.168.60.\nto test 192.168.60.1-254\n",argv[0]);
return;
}
if (4==sscanf(argv[1],"%d.%d.%d%c",&IP[0],&IP[1],&IP[2],&c)) {
if (0<=IP[0] && IP[0]<=255
&& 0<=IP[1] && IP[1]<=255
&& 0<=IP[2] && IP[2]<=255
&& '.'==c) {
for (i=1;i<255;i++) {
sprintf(cmdstr,"cmd /c ping %s%d -n 1 -w 1000 >d:\\ping%d.txt",argv[1],i,i);
WinExec(cmdstr,SW_HIDE);
}
Sleep(3000);
for (i=1;i<255;i++) {
printf("%c %s%d\n",YN(i),argv[1],i);
}
Sleep(3000);
WinExec("cmd /c del /q d:\\ping*.txt",SW_HIDE);
} else goto USAGE;
} else goto USAGE;
}