int FindString(char *str1,char *str2)
{
int nstr1,nstr2,i,j,nstr,sstr;
nstr1=strlen(str1);
nstr2=strlen(str2);
if(nstr1>nstr2)
{
nstr=nstr1-nstr2;
for(i=0;i<nstr;i++)
{
sstr=0;
for(j=0;j<nstr2;j++)
{
if(str1[j+i]==str2[j])
{
sstr++;
}
}
if(sstr==nstr2)
{
return 1;
}
}
}
else
{
return -1;
}
return 0;
}

int CheckProxy(char *proxy, int port)
{
SOCKADDR_IN anAddr;
anAddr.sin_family = AF_INET;
anAddr.sin_addr.S_un.S_addr = inet_addr(proxy);
anAddr.sin_port = htons(port);

SOCKET  Socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
int tmo = 3000;
setsockopt(Socket,SOL_SOCKET,SO_RCVTIMEO,(const char*)&tmo,sizeof(tmo));

int i;
char Answer[40];
char HTTPAnswer[] = "HTTP/1.1";
connect(Socket, (struct sockaddr *)&anAddr, sizeof(struct sockaddr));
//SOCKS
char Message2[] = {0x05,0x01,0x00};
send(Socket,Message2,3, 0);
memset(Message2,0,3);
recv(Socket, Message2, 3, 0);
if(Message2[0]==0x05)
{
return 5;
}
else
{
//http
char zSend[] = "GET / HTTP/1.1\r\nUser-Agent: Opera/9.63 (Windows NT 5.1; U; ru) Presto/2.1.1\r\nHost: www.google.com\r\nAccept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1\r\nAccept-Language: ru-RU,ru;q=0.9,en;q=0.8\r\nAccept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1\r\nAccept-Encoding: deflate, gzip, x-gzip, identity, *;q=0\r\nCookie: rememberme=true;\r\nPREF=ID=cbb453ccc57c8739:TM=1228397956:LM=1228457555:GM=1:S=PD__kjM08drYVN99;\r\nNID=19=QiJDI3cjj8O4IHJ3M7LO81Clx9avdSixKEHLLgqFw1OtlYjy_Iqt-qOwO1WuTYj6_ZgNzf_eWRndnTWkAQ-N7hfii7nh7skDUtQtpMEsLFOq1MisvpHTzQn9g0FCZXwO;\r\nSID=DQAAAH0AAAAg2B1ks0PiX3lB6cSvZSSgCiGHwjea5TLv7CzWzH5q23MkMc7Ikj0h5pWoM4nrfSIVq-9upxKQd-QWc-NZkZNggOE425YOTsNEks-R3Zfae0k8tEpyLVG-aQI6zq90BlzIYB99XcDSfy\r\nb79S2_-80zTE82Q9PY-7VE5l2SrvTIw\r\nCookie2: $Version=1\r\nConnection: Keep-Alive, TE\r\nTE: deflate, gzip, chunked, identity, trailers\r\n\r\n";
send(Socket,zSend,strlen(zSend), 0);
recv(Socket, Answer, 40, 0);
if(FindString(Answer,HTTPAnswer)==1)
return 3;
}

closesocket(Socket);
return -1;
}