考试网 >> IT认证 >> 微软 >> MCSE指导 >> 微软ping命令的源代码

发布时间：2006-06-28 06:09     点击：

#define MAX_PACKET 1024

#define xmalloc(s) HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,(s))

#define xfree(p) HeapFree (GetProcessHeap(),0,(p))

void fill_icmp_data(char *, int);

USHORT checksum(USHORT *, int);

void decode_resp(char *,int ,struct sockaddr_in *);

void Usage(char *progname){

fprintf(stderr,"Usage:\n");

fprintf(stderr,"%s [data_size]\n",progname);

fprintf(stderr,"datasize can be up to 1Kb\n");

ExitProcess(STATUS_FAILED);

}

int main(int argc, char **argv){

WSADATA wsaData;

SOCKET sockRaw;

struct sockaddr_in dest,from;

struct hostent * hp;

int bread,datasize;

int fromlen = sizeof(from);

int timeout = 1000;

char *dest_ip;

char *icmp_data;

char *recvbuf;

unsigned int addr=0;

USHORT seq_no = 0;

if (WSAStartup(MAKEWORD(2,1),&wsaData) != 0){

fprintf(stderr,"WSAStartup failed: %d\n",GetLastError());

ExitProcess(STATUS_FAILED);

}

if (argc <2 ) {

Usage(argv[0]);

}

sockRaw = WSASocket (AF_INET,

SOCK_RAW,

IPPROTO_ICMP,

NULL, 0,0);

if (sockRaw == INVALID_SOCKET) {

fprintf(stderr,"WSASocket() failed: %d\n",WSAGetLastError());

ExitProcess(STATUS_FAILED);

}

bread = setsockopt(sockRaw,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,

sizeof(timeout));

if(bread == SOCKET_ERROR) {

fprintf(stderr,"failed to set recv timeout: %d\n",WSAGetLastError());

ExitProcess(STATUS_FAILED);

}

timeout = 1000;

bread = setsockopt(sockRaw,SOL_SOCKET,SO_SNDTIMEO,(char*)&timeout,

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