www.pudn.com > spy_pass.zip > tcp.cpp
#include
#include
#include
#include
#include "tcp.h"
int wsa_ok =0, err_no =0;
void peek_message(void);
int get_local_ip(char *ip);
int tcp_init()
{
WSAData wsa;
//sd_bind =sd_connect =sd_accept =-1;
if(WSAStartup(MAKEWORD(1, 1), &wsa) !=0)
return -1;
wsa_ok =1;
return 0;
}
int tcp_exit()
{
if(wsa_ok) WSACleanup();
return 0;
}
int tcp_status(int sd, char *type, int timeout)
{
fd_set rset, wset, eset;
fd_set FAR *prset =NULL, *pwset =NULL, *peset =NULL;
struct timeval tval;
int i, status, err_no =0;
time_t t1, t2;
MSG msg;
tval.tv_sec =0;
tval.tv_usec =0;
time(&t1);
t2 =t1;
while(t2-t1 < timeout)
{
FD_ZERO(&rset);
FD_ZERO(&wset);
FD_ZERO(&eset);
for(i =0; i<(int)strlen(type); i++)
{
if(type[i] =='r') { FD_SET(sd, &rset); prset =&rset; }
if(type[i] =='w') { FD_SET(sd, &wset); pwset =&wset; }
if(type[i] =='e') { FD_SET(sd, &eset); peset =&eset; }
}
status =select(-1/*sd+1*/, prset, pwset, peset, &tval);
time(&t2);
if(status ==0)
{
if(PeekMessage(&msg, 0, NULL, NULL, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
if(msg.message ==WM_QUIT) return -1;
}
if(t2-t1 h_addr, hp->h_length);
}
else addr.sin_addr.s_addr=ul;
addr.sin_family =AF_INET;
addr.sin_port =htons((unsigned short)port);
l =1;
if(f_noblock && ioctlsocket(sd, FIONBIO, (unsigned long *)&l) <0)
{
closesocket(sd);
return -1;
}
/*if(setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *)&l, sizeof(l)) <0)
{
closesocket(sd);
return -1;
}*/
time(&t1);
while((ret =connect(sd, (struct sockaddr *)&addr, sizeof(addr))) !=0)
{
time(&t2);
if((t2 -t1) > timeout)
{
closesocket(sd);
return -1;
}
peek_message();
int err_no =WSAGetLastError();
if(ret ==SOCKET_ERROR)
{
if(err_no ==WSAEISCONN) break;
}
else if(err_no ==WSAEWOULDBLOCK /*|| err_no ==WSAEINPROGRESS*/ || err_no ==WSAEALREADY)
{
continue;
}
else
{
closesocket(sd);
return -1;
}
}
if(tcp_status(sd, "we", timeout) <0)
{
sprintf(temp, "status:连接服务器失败!\n检查服务器端程序是否运行\n且主机地址是否%s, 端口是否%d\n"
"errno=%d",
hostname, port, WSAGetLastError());
closesocket(sd);
return -1;
}
//sd_connect =sd;
return sd;
}
void tcp_close(int sd)
{
tcp_disconnect(sd);
}
void tcp_disconnect(int sd)
{
if(sd >0)
{
closesocket(sd);
//if(sd ==sd_connect) sd_connect =-1;
//if(sd ==sd_accept) sd_accept =-1;
//if(sd ==sd_bind) sd_bind =-1;
}
}
int tcp_send(int sd, char *buf, int len, int timeout)
{
int len1, len_send =0;
time_t t1, t2;
len_send =0;
time(&t1);
t2 =t1;
while(len_send timeout)
return len_send;
if(tcp_status(sd, "w", timeout-(t2-t1)) <0)
return len_send;
if((len1 =send(sd, &buf[len_send], len-len_send, 0)) <=0)
{
err_no =GetLastError();
if(len1 ==SOCKET_ERROR && err_no ==WSAEWOULDBLOCK)
{
time(&t2);
continue;
}
return len_send;
}
len_send +=len1;
time(&t2);
}
return len_send;
}
int tcp_recv(int sd, char *buf, int len, int timeout)
{
int len1, len_recv;
time_t t2, t1;
len_recv =0;
time(&t1);
t2 =t1;
while(len_recv timeout)
return len_recv;
if(tcp_status(sd, "r", timeout-(t2-t1)) <0)
return len_recv;
if((len1 =recv(sd, &buf[len_recv], len-len_recv, 0)) <=0)
{
err_no =GetLastError();
if(timeout ==0) break;
if(len1 ==SOCKET_ERROR && err_no ==WSAEWOULDBLOCK)
{
time(&t2);
continue;
}
return len_recv;
}
len_recv +=len1;
time(&t2);
}
return len_recv;
}
int tcp_gethostnamebyip(char *ip, char *host)
{
struct hostent *hp;
struct in_addr ul;
host[0] =0;
ul.S_un.S_addr =inet_addr(ip);
if(ul.S_un.S_addr ==0xFFFFFFFF) return -1; // ip error or ip is hostname
hp =gethostbyaddr((char *)&ul, 4, AF_INET);
if(hp ==NULL) return -1; // can not get hostname
strcpy(host, hp->h_name);
return 0;
}
int get_local_ip(char *ip)
{
struct hostent *hp;
char host[50], *p;
if(gethostname(host, sizeof(host)) <0) return -1;
hp =gethostbyname(host);
if(hp ==NULL) return -1;
p =(char *)hp->h_addr;
wsprintf(ip, "%d.%d.%d.%d", (int)p[0]&0xFF, (int)p[1]&0xFF, (int)p[2]&0xFF, (int)p[3]&0xFF);
return 0;
}
char *get_remote_ip(int sd, char *ip)
{
struct sockaddr_in addr_in;
int len =sizeof(addr_in);
char *p1;
if(sd <0) return NULL;
if(getpeername(sd, (struct sockaddr *)&addr_in, &len) <0)
return NULL;
p1 =(char *)&addr_in.sin_addr;
sprintf(ip, "%d.%d.%d.%d", ((int)p1[0]) &0xff, ((int)p1[1]) &0xff, (int)p1[2] &0xff, (int)p1[3]&0xff);
return ip;
}
unsigned short tcp_htons(unsigned short s)
{
return htons(s);
}
unsigned short tcp_ntohs(unsigned short s)
{
return ntohs(s);
}
unsigned long int tcp_htonl(unsigned long int l)
{
return htonl(l);
}
unsigned long int tcp_ntohl(unsigned long int l)
{
return ntohl(l);
}
float tcp_htonf(float f)
{
unsigned char *p, p0, p1;
if(htons(1) ==1) return f;
p =(unsigned char *)&f;
p0 =p[0];
p1 =p[1];
p[0] =p[3];
p[3] =p0;
p[1] =p[2];
p[2] =p1;
return f;
}
float tcp_ntohf(float f)
{
unsigned char *p, p0, p1;
if(ntohs(1) ==1) return f;
p =(unsigned char *)&f;
p0 =p[0];
p1 =p[1];
p[0] =p[3];
p[3] =p0;
p[1] =p[2];
p[2] =p1;
return f;
}
double tcp_htond(double d)
{
unsigned char *p, p0, p1, p2, p3;
if(htons(1) ==1) return d;
p =(unsigned char *)&d;
p0 =p[0];
p1 =p[1];
p2 =p[2];
p3 =p[3];
p[0] =p[7];
p[7] =p0;
p[1] =p[6];
p[6] =p1;
p[2] =p[5];
p[5] =p2;
p[3] =p[4];
p[4] =p3;
return d;
}
double tcp_ntohd(double d)
{
unsigned char *p, p0, p1, p2, p3;
if(ntohs(1) ==1) return d;
p =(unsigned char *)&d;
p0 =p[0];
p1 =p[1];
p2 =p[2];
p3 =p[3];
p[0] =p[7];
p[7] =p0;
p[1] =p[6];
p[6] =p1;
p[2] =p[5];
p[5] =p2;
p[3] =p[4];
p[4] =p3;
return d;
}
void peek_message(void)
{
MSG msg;
if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}