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Diffstat (limited to 'krfb/libvncserver/sockets.c')
-rw-r--r--krfb/libvncserver/sockets.c592
1 files changed, 0 insertions, 592 deletions
diff --git a/krfb/libvncserver/sockets.c b/krfb/libvncserver/sockets.c
deleted file mode 100644
index 68025b3d..00000000
--- a/krfb/libvncserver/sockets.c
+++ /dev/null
@@ -1,592 +0,0 @@
-/*
- * sockets.c - deal with TCP & UDP sockets.
- *
- * This code should be independent of any changes in the RFB protocol. It just
- * deals with the X server scheduling stuff, calling rfbNewClientConnection and
- * rfbProcessClientMessage to actually deal with the protocol. If a socket
- * needs to be closed for any reason then rfbCloseClient should be called, and
- * this in turn will call rfbClientConnectionGone. To make an active
- * connection out, call rfbConnect - note that this does _not_ call
- * rfbNewClientConnection.
- *
- * This file is divided into two types of function. Those beginning with
- * "rfb" are specific to sockets using the RFB protocol. Those without the
- * "rfb" prefix are more general socket routines (which are used by the http
- * code).
- *
- * Thanks to Karl Hakimian for pointing out that some platforms return EAGAIN
- * not EWOULDBLOCK.
- */
-
-/*
- * OSXvnc Copyright (C) 2001 Dan McGuirk <[email protected]>.
- * Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
- * All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- */
-
-#include <stdio.h>
-#include <sys/types.h>
-#ifdef WIN32
-#pragma warning (disable: 4018 4761)
-#define close closesocket
-#define read(sock,buf,len) recv(sock,buf,len,0)
-#define EWOULDBLOCK WSAEWOULDBLOCK
-#define ETIMEDOUT WSAETIMEDOUT
-#define write(sock,buf,len) send(sock,buf,len,0)
-#else
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <netdb.h>
-#include <unistd.h>
-#include <arpa/inet.h>
-#endif
-#if defined(__osf__)
-typedef int socklen_t;
-#endif
-#if defined(__linux__) && defined(NEED_TIMEVAL)
-struct timeval
-{
- long int tv_sec,tv_usec;
-}
-;
-#endif
-#include <fcntl.h>
-#include <errno.h>
-
-#ifdef USE_LIBWRAP
-#include <syslog.h>
-#include <tcpd.h>
-int allow_severity=LOG_INFO;
-int deny_severity=LOG_WARNING;
-#endif
-
-#include "rfb.h"
-
-/*#ifndef WIN32
-int max(int i,int j) { return(i<j?j:i); }
-#endif
-*/
-
-int rfbMaxClientWait = 20000; /* time (ms) after which we decide client has
- gone away - needed to stop us hanging */
-
-/*
- * rfbInitSockets sets up the TCP and UDP sockets to listen for RFB
- * connections. It does nothing if called again.
- */
-
-void
-rfbInitSockets(rfbScreenInfoPtr rfbScreen)
-{
- if (rfbScreen->socketInitDone)
- return;
-
- rfbScreen->socketInitDone = TRUE;
-
- if (rfbScreen->inetdSock != -1) {
- const int one = 1;
-
-#ifndef WIN32
- if (fcntl(rfbScreen->inetdSock, F_SETFL, O_NONBLOCK) < 0) {
- rfbLogPerror("fcntl");
- exit(1);
- }
-#endif
-
- if (setsockopt(rfbScreen->inetdSock, IPPROTO_TCP, TCP_NODELAY,
- (char *)&one, sizeof(one)) < 0) {
- rfbLogPerror("setsockopt");
- exit(1);
- }
-
- FD_ZERO(&(rfbScreen->allFds));
- FD_SET(rfbScreen->inetdSock, &(rfbScreen->allFds));
- rfbScreen->maxFd = rfbScreen->inetdSock;
- return;
- }
-
- if(rfbScreen->autoPort) {
- int i;
- rfbLog("Autoprobing TCP port \n");
-
- for (i = 5900; i < 6000; i++) {
- if ((rfbScreen->rfbListenSock = ListenOnTCPPort(i)) >= 0) {
- rfbScreen->rfbPort = i;
- break;
- }
- }
-
- if (i >= 6000) {
- rfbLogPerror("Failure autoprobing");
- exit(1);
- }
-
- rfbLog("Autoprobing selected port %d\n", rfbScreen->rfbPort);
- FD_ZERO(&(rfbScreen->allFds));
- FD_SET(rfbScreen->rfbListenSock, &(rfbScreen->allFds));
- rfbScreen->maxFd = rfbScreen->rfbListenSock;
- }
- else if(rfbScreen->rfbPort>0) {
- rfbLog("Listening for VNC connections on TCP port %d\n", rfbScreen->rfbPort);
-
- if ((rfbScreen->rfbListenSock = ListenOnTCPPort(rfbScreen->rfbPort)) < 0) {
- rfbLogPerror("ListenOnTCPPort");
- exit(1);
- }
-
- FD_ZERO(&(rfbScreen->allFds));
- FD_SET(rfbScreen->rfbListenSock, &(rfbScreen->allFds));
- rfbScreen->maxFd = rfbScreen->rfbListenSock;
- }
-
- if (rfbScreen->udpPort != 0) {
- rfbLog("rfbInitSockets: listening for input on UDP port %d\n",rfbScreen->udpPort);
-
- if ((rfbScreen->udpSock = ListenOnUDPPort(rfbScreen->udpPort)) < 0) {
- rfbLogPerror("ListenOnUDPPort");
- exit(1);
- }
- FD_SET(rfbScreen->udpSock, &(rfbScreen->allFds));
- rfbScreen->maxFd = max((int)rfbScreen->udpSock,rfbScreen->maxFd);
- }
-}
-
-
-/*
- * rfbCheckFds is called from ProcessInputEvents to check for input on the RFB
- * socket(s). If there is input to process, the appropriate function in the
- * RFB server code will be called (rfbNewClientConnection,
- * rfbProcessClientMessage, etc).
- */
-
-void
-rfbCheckFds(rfbScreenInfoPtr rfbScreen,long usec)
-{
- int nfds;
- fd_set fds;
- struct timeval tv;
- struct sockaddr_in addr;
- size_t addrlen = sizeof(addr);
- char buf[6];
- const int one = 1;
- int sock;
- rfbClientIteratorPtr i;
- rfbClientPtr cl;
-
- if (!rfbScreen->inetdInitDone && rfbScreen->inetdSock != -1) {
- rfbNewClientConnection(rfbScreen,rfbScreen->inetdSock);
- rfbScreen->inetdInitDone = TRUE;
- }
-
- memcpy((char *)&fds, (char *)&(rfbScreen->allFds), sizeof(fd_set));
- tv.tv_sec = 0;
- tv.tv_usec = usec;
- nfds = select(rfbScreen->maxFd + 1, &fds, NULL, NULL /* &fds */, &tv);
- if (nfds == 0) {
- return;
- }
- if (nfds < 0) {
-#ifdef WIN32
- errno = WSAGetLastError();
-#endif
- rfbLogPerror("rfbCheckFds: select");
- return;
- }
-
- if (rfbScreen->rfbListenSock != -1 && FD_ISSET(rfbScreen->rfbListenSock, &fds)) {
-
- if ((sock = accept(rfbScreen->rfbListenSock,
- (struct sockaddr *)&addr, &addrlen)) < 0) {
- rfbLogPerror("rfbCheckFds: accept");
- return;
- }
-
-#ifndef WIN32
- if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
- rfbLogPerror("rfbCheckFds: fcntl");
- close(sock);
- return;
- }
-#endif
-
- if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
- (char *)&one, sizeof(one)) < 0) {
- rfbLogPerror("rfbCheckFds: setsockopt");
- close(sock);
- return;
- }
-
-#ifdef USE_LIBWRAP
- if(!hosts_ctl("vnc",STRING_UNKNOWN,inet_ntoa(addr.sin_addr),
- STRING_UNKNOWN)) {
- rfbLog("Rejected connection from client %s\n",
- inet_ntoa(addr.sin_addr));
- close(sock);
- return;
- }
-#endif
-
- rfbLog("Got connection from client %s\n", inet_ntoa(addr.sin_addr));
-
- rfbNewClient(rfbScreen,sock);
-
- FD_CLR(rfbScreen->rfbListenSock, &fds);
- if (--nfds == 0)
- return;
- }
-
- if ((rfbScreen->udpSock != -1) && FD_ISSET(rfbScreen->udpSock, &fds)) {
- if(!rfbScreen->udpClient)
- rfbNewUDPClient(rfbScreen);
- if (recvfrom(rfbScreen->udpSock, buf, 1, MSG_PEEK,
- (struct sockaddr *)&addr, &addrlen) < 0) {
- rfbLogPerror("rfbCheckFds: UDP: recvfrom");
- rfbDisconnectUDPSock(rfbScreen);
- rfbScreen->udpSockConnected = FALSE;
- } else {
- if (!rfbScreen->udpSockConnected ||
- (memcmp(&addr, &rfbScreen->udpRemoteAddr, addrlen) != 0))
- {
- /* new remote end */
- rfbLog("rfbCheckFds: UDP: got connection\n");
-
- memcpy(&rfbScreen->udpRemoteAddr, &addr, addrlen);
- rfbScreen->udpSockConnected = TRUE;
-
- if (connect(rfbScreen->udpSock,
- (struct sockaddr *)&addr, addrlen) < 0) {
- rfbLogPerror("rfbCheckFds: UDP: connect");
- rfbDisconnectUDPSock(rfbScreen);
- return;
- }
-
- rfbNewUDPConnection(rfbScreen,rfbScreen->udpSock);
- }
-
- rfbProcessUDPInput(rfbScreen);
- }
-
- FD_CLR(rfbScreen->udpSock, &fds);
- if (--nfds == 0)
- return;
- }
-
- i = rfbGetClientIterator(rfbScreen);
- while((cl = rfbClientIteratorNext(i))) {
- if (cl->onHold)
- continue;
- if (FD_ISSET(cl->sock, &fds) && FD_ISSET(cl->sock, &(rfbScreen->allFds)))
- rfbProcessClientMessage(cl);
- }
- rfbReleaseClientIterator(i);
-}
-
-
-void
-rfbDisconnectUDPSock(rfbScreenInfoPtr rfbScreen)
-{
- rfbScreen->udpSockConnected = FALSE;
-}
-
-
-
-void
-rfbCloseClient(cl)
- rfbClientPtr cl;
-{
- LOCK(cl->updateMutex);
- if (cl->sock != -1) {
- FD_CLR(cl->sock,&(cl->screen->allFds));
- shutdown(cl->sock,SHUT_RDWR);
- close(cl->sock);
- cl->sock = -1;
- }
- TSIGNAL(cl->updateCond);
- UNLOCK(cl->updateMutex);
-}
-
-
-/*
- * rfbConnect is called to make a connection out to a given TCP address.
- */
-
-int
-rfbConnect(rfbScreen, host, port)
- rfbScreenInfoPtr rfbScreen;
- char *host;
- int port;
-{
- int sock;
- int one = 1;
-
- rfbLog("Making connection to client on host %s port %d\n",
- host,port);
-
- if ((sock = ConnectToTcpAddr(host, port)) < 0) {
- rfbLogPerror("connection failed");
- return -1;
- }
-
-#ifndef WIN32
- if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
- rfbLogPerror("fcntl failed");
- close(sock);
- return -1;
- }
-#endif
-
- if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
- (char *)&one, sizeof(one)) < 0) {
- rfbLogPerror("setsockopt failed");
- close(sock);
- return -1;
- }
-
- /* AddEnabledDevice(sock); */
- FD_SET(sock, &rfbScreen->allFds);
- rfbScreen->maxFd = max(sock,rfbScreen->maxFd);
-
- return sock;
-}
-
-/*
- * ReadExact reads an exact number of bytes from a client. Returns 1 if
- * those bytes have been read, 0 if the other end has closed, or -1 if an error
- * occurred (errno is set to ETIMEDOUT if it timed out).
- * timeout is the timeout in ms, 0 for no timeout.
- */
-
-int
-ReadExactTimeout(rfbClientPtr cl, char* buf, int len, int timeout)
-{
- int sock = cl->sock;
- int n;
- fd_set fds;
- struct timeval tv;
- int to = 20000;
- if (timeout)
- to = timeout;
-
- while (len > 0) {
- n = read(sock, buf, len);
-
- if (n > 0) {
-
- buf += n;
- len -= n;
-
- } else if (n == 0) {
-
- return 0;
-
- } else {
-#ifdef WIN32
- errno = WSAGetLastError();
-#endif
- if (errno != EWOULDBLOCK && errno != EAGAIN) {
- return n;
- }
-
- FD_ZERO(&fds);
- FD_SET(sock, &fds);
- tv.tv_sec = to / 1000;
- tv.tv_usec = (to % 1000) * 1000;
- n = select(sock+1, &fds, NULL, &fds, &tv);
- if (n < 0) {
- rfbLogPerror("ReadExact: select");
- return n;
- }
- if ((n == 0) && timeout) {
- errno = ETIMEDOUT;
- return -1;
- }
- }
- }
- return 1;
-}
-
-int ReadExact(rfbClientPtr cl,char* buf,int len)
-{
- return ReadExactTimeout(cl, buf, len, 0);
-}
-
-/*
- * WriteExact writes an exact number of bytes to a client. Returns 1 if
- * those bytes have been written, or -1 if an error occurred (errno is set to
- * ETIMEDOUT if it timed out).
- */
-
-int
-WriteExact(cl, buf, len)
- rfbClientPtr cl;
- const char *buf;
- int len;
-{
- int sock = cl->sock;
- int n;
- fd_set fds;
- struct timeval tv;
- int totalTimeWaited = 0;
-
- LOCK(cl->outputMutex);
- while (len > 0) {
- n = write(sock, buf, len);
-
- if (n > 0) {
-
- buf += n;
- len -= n;
-
- } else if (n == 0) {
-
- rfbLog("WriteExact: write returned 0?\n");
- exit(1);
-
- } else {
-#ifdef WIN32
- errno = WSAGetLastError();
-#endif
- if (errno != EWOULDBLOCK && errno != EAGAIN) {
- UNLOCK(cl->outputMutex);
- return n;
- }
-
- /* Retry every 5 seconds until we exceed rfbMaxClientWait. We
- need to do this because select doesn't necessarily return
- immediately when the other end has gone away */
-
- FD_ZERO(&fds);
- FD_SET(sock, &fds);
- tv.tv_sec = 5;
- tv.tv_usec = 0;
- n = select(sock+1, NULL, &fds, NULL /* &fds */, &tv);
- if (n < 0) {
- rfbLogPerror("WriteExact: select");
- UNLOCK(cl->outputMutex);
- return n;
- }
- if (n == 0) {
- totalTimeWaited += 5000;
- if (totalTimeWaited >= rfbMaxClientWait) {
- errno = ETIMEDOUT;
- UNLOCK(cl->outputMutex);
- return -1;
- }
- } else {
- totalTimeWaited = 0;
- }
- }
- }
- UNLOCK(cl->outputMutex);
- return 1;
-}
-
-int
-ListenOnTCPPort(port)
- int port;
-{
- struct sockaddr_in addr;
- int sock;
- int one = 1;
-
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
- /* addr.sin_addr.s_addr = interface.s_addr; */
- addr.sin_addr.s_addr = INADDR_ANY;
-
- if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- return -1;
- }
- if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *)&one, sizeof(one)) < 0) {
- close(sock);
- return -1;
- }
- if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
- close(sock);
- return -1;
- }
- if (listen(sock, 5) < 0) {
- close(sock);
- return -1;
- }
-
- return sock;
-}
-
-int
-ConnectToTcpAddr(host, port)
- char *host;
- int port;
-{
- struct hostent *hp;
- int sock;
- struct sockaddr_in addr;
-
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
-
- if ((addr.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE)
- {
- if (!(hp = gethostbyname(host))) {
- errno = EINVAL;
- return -1;
- }
- addr.sin_addr.s_addr = *(unsigned long *)hp->h_addr;
- }
-
- if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- return -1;
- }
-
- if (connect(sock, (struct sockaddr *)&addr, (sizeof(addr))) < 0) {
- close(sock);
- return -1;
- }
-
- return sock;
-}
-
-int
-ListenOnUDPPort(port)
- int port;
-{
- struct sockaddr_in addr;
- int sock;
- int one = 1;
-
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
- /* addr.sin_addr.s_addr = interface.s_addr; */
- addr.sin_addr.s_addr = INADDR_ANY;
-
- if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- return -1;
- }
- if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *)&one, sizeof(one)) < 0) {
- return -1;
- }
- if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
- return -1;
- }
-
- return sock;
-}
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