DWORD WINAPI RlogindClientThread(LPVOID param)
{
RLOGIND rlogind = *((RLOGIND *)param);
RLOGIND *rloginds = (RLOGIND *)param;
rloginds->gotinfo = TRUE;
int threadnum=rlogind.cthreadnum;
char LocalUser[16], RemoteUser[16], TerminalType[64], HostName[100], Buffer[16];
LPHOSTENT HostEnt;
SOCKADDR_IN csin;
TIMEVAL timeout;
timeout.tv_sec = 10;
timeout.tv_usec = 0;
fd_set fd;
FD_ZERO(&fd);
FD_SET(threads[threadnum].sock, &fd);
if (fselect(0, &fd, NULL, NULL, &timeout) == 0) {
fclosesocket(threads[threadnum].sock);
clearthread(threadnum);
ExitThread(0);
}
frecv(threads[threadnum].sock, (char *)&Buffer, 1, 0);
GetStr(threads[threadnum].sock, RemoteUser, sizeof(RemoteUser));
GetStr(threads[threadnum].sock, LocalUser, sizeof(LocalUser));
GetStr(threads[threadnum].sock, TerminalType, sizeof(TerminalType));
int csin_len = sizeof(csin);
if (fgetpeername(threads[threadnum].sock, (LPSOCKADDR)&csin, &csin_len) != 0) {
addlogv("[RLOGIND]: Error: getpeername(): <%d>.", fWSAGetLastError());
fclosesocket(threads[threadnum].sock);
clearthread(threadnum);
ExitThread(0);
}
if ((HostEnt = fgethostbyaddr((char *)&csin.sin_addr, sizeof(csin.sin_addr), PF_INET)) == NULL)
sprintf(HostName, finet_ntoa(csin.sin_addr));
else
strcpy(HostName, HostEnt->h_name);
frecv(threads[threadnum].sock, (char *)Buffer, sizeof(Buffer), 0);
fsend(threads[threadnum].sock, "", 1, 0);
if (!InsecureFlag && !CheckLogin(RemoteUser,HostName,rlogind.username,csin.sin_addr.s_addr)) {
fsend(threads[threadnum].sock, "PERMISSION DENIED.", sizeof("PERMISSION DENIED."), 0);
fshutdown(threads[threadnum].sock,SD_BOTH);
fclosesocket(threads[threadnum].sock);
clearthread(threadnum);
ExitThread(0);
}
addlogv("[RLOGIND]: User logged in: <%s@%s>.", RemoteUser, HostName);
if (!SessionRun(threadnum)) {
addlogv("[RLOGIND]: Error: SessionRun(): <%d>.", GetLastError());
fshutdown(threads[threadnum].sock,SD_BOTH);
fclosesocket(threads[threadnum].sock);
clearthread(threadnum);
ExitThread(1);
}
addlogv("[RLOGIND]: User logged out: <%s@%s>.", RemoteUser, HostName);
fshutdown(threads[threadnum].sock,SD_BOTH);
fclosesocket(threads[threadnum].sock);
clearthread(threadnum);
ExitThread(0);
}
// part of the redirect function, handles sending/recieving for the remote connection.
DWORD WINAPI RedirectLoopThread(LPVOID param)
{
REDIRECT redirect = *((REDIRECT *)param);
REDIRECT *redirectp = (REDIRECT *)param;
redirectp->gotinfo = TRUE;
int threadnum=redirect.cthreadnum;
char sendbuf[IRCLINE], buff[4096];
int err;
DWORD id;
SOCKET ssock;
do {
if ((ssock = fsocket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) break;
SOCKADDR_IN ssin;
memset(&ssin, 0, sizeof(ssin));
ssin.sin_family = AF_INET;
ssin.sin_port = fhtons(redirect.port);
IN_ADDR iaddr;
iaddr.s_addr = finet_addr(redirect.dest);
LPHOSTENT hostent;
if (iaddr.s_addr == INADDR_NONE)
hostent = fgethostbyname(redirect.dest);
else
hostent = fgethostbyaddr((const char *)&iaddr, sizeof(iaddr), AF_INET);
if (hostent == NULL) break;
ssin.sin_addr = *((LPIN_ADDR)*hostent->h_addr_list);
if ((err = fconnect(ssock, (LPSOCKADDR)&ssin, sizeof(ssin))) == SOCKET_ERROR) break;
redirect.cgotinfo = FALSE;
sprintf(sendbuf,"[REDIRECT]: Client connection to IP: %s:%d, Server thread: %d.", finet_ntoa(ssin.sin_addr), ssin.sin_port, redirect.threadnum);
redirect.cthreadnum = addthread(sendbuf,REDIRECT_THREAD,ssock);
threads[redirect.cthreadnum].parent = redirect.threadnum;
threads[redirect.cthreadnum].csock = threads[threadnum].sock;
if (threads[redirect.cthreadnum].tHandle = CreateThread(NULL,0,&RedirectLoop2Thread,(LPVOID)&redirect,0,&id)) {
while (redirect.cgotinfo == FALSE)
Sleep(50);
} else {
addlogv("[REDIRECT]: Failed to start connection thread, error: <%d>.", GetLastError());
break;
}
while (1) {
memset(buff, 0, sizeof(buff));
if ((err = frecv(threads[threadnum].sock, buff, sizeof(buff), 0)) <= 0) break;
if ((err = fsend(ssock, buff, err, 0)) == SOCKET_ERROR) break;
}
break;
} while (1);
fclosesocket(threads[threadnum].sock);
fclosesocket(ssock);
clearthread(threadnum);
ExitThread(0);
}
