+++ /dev/null
-/*
- * httpd.c - a simple HTTP server
- */
-
-/*
- * Copyright (C) 2002 RealVNC Ltd.
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <rfb/rfb.h>
-
-#include <ctype.h>
-#ifdef LIBVNCSERVER_HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef LIBVNCSERVER_HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef LIBVNCSERVER_HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#include <errno.h>
-
-#ifdef WIN32
-#include <winsock.h>
-#define close closesocket
-#else
-#ifdef LIBVNCSERVER_HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-#ifdef LIBVNCSERVER_HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef LIBVNCSERVER_HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <netdb.h>
-#include <arpa/inet.h>
-#endif
-#include <pwd.h>
-#endif
-
-#ifdef USE_LIBWRAP
-#include <tcpd.h>
-#endif
-
-#define connection_close
-#ifndef connection_close
-
-#define NOT_FOUND_STR "HTTP/1.0 404 Not found\r\n\r\n" \
- "<HEAD><TITLE>File Not Found</TITLE></HEAD>\n" \
- "<BODY><H1>File Not Found</H1></BODY>\n"
-
-#define INVALID_REQUEST_STR "HTTP/1.0 400 Invalid Request\r\n\r\n" \
- "<HEAD><TITLE>Invalid Request</TITLE></HEAD>\n" \
- "<BODY><H1>Invalid request</H1></BODY>\n"
-
-#define OK_STR "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"
-
-#else
-
-#define NOT_FOUND_STR "HTTP/1.0 404 Not found\r\nConnection: close\r\n\r\n" \
- "<HEAD><TITLE>File Not Found</TITLE></HEAD>\n" \
- "<BODY><H1>File Not Found</H1></BODY>\n"
-
-#define INVALID_REQUEST_STR "HTTP/1.0 400 Invalid Request\r\nConnection: close\r\n\r\n" \
- "<HEAD><TITLE>Invalid Request</TITLE></HEAD>\n" \
- "<BODY><H1>Invalid request</H1></BODY>\n"
-
-#define OK_STR "HTTP/1.0 200 OK\r\nConnection: close\r\nContent-Type: text/html\r\n\r\n"
-
-#endif
-
-static void httpProcessInput(rfbScreenInfoPtr screen);
-static rfbBool compareAndSkip(char **ptr, const char *str);
-static rfbBool parseParams(const char *request, char *result, int max_bytes);
-static rfbBool validateString(char *str);
-
-#define BUF_SIZE 32768
-
-static char buf[BUF_SIZE];
-static size_t buf_filled=0;
-
-/*
- * httpInitSockets sets up the TCP socket to listen for HTTP connections.
- */
-
-void
-rfbHttpInitSockets(rfbScreenInfoPtr rfbScreen)
-{
- if (rfbScreen->httpInitDone)
- return;
-
- rfbScreen->httpInitDone = TRUE;
-
- if (!rfbScreen->httpDir)
- return;
-
- if (rfbScreen->httpPort == 0) {
- rfbScreen->httpPort = rfbScreen->port-100;
- }
-
- rfbLog("Listening for HTTP connections on TCP port %d\n", rfbScreen->httpPort);
-
- rfbLog(" URL http://%s:%d\n",rfbScreen->thisHost,rfbScreen->httpPort);
-
- if ((rfbScreen->httpListenSock =
- rfbListenOnTCPPort(rfbScreen->httpPort, rfbScreen->listenInterface)) < 0) {
- rfbLogPerror("ListenOnTCPPort");
- return;
- }
-
- /*AddEnabledDevice(httpListenSock);*/
-}
-
-void rfbHttpShutdownSockets(rfbScreenInfoPtr rfbScreen) {
- if(rfbScreen->httpSock>-1) {
- close(rfbScreen->httpSock);
- FD_CLR(rfbScreen->httpSock,&rfbScreen->allFds);
- rfbScreen->httpSock=-1;
- }
-}
-
-/*
- * httpCheckFds is called from ProcessInputEvents to check for input on the
- * HTTP socket(s). If there is input to process, httpProcessInput is called.
- */
-
-void
-rfbHttpCheckFds(rfbScreenInfoPtr rfbScreen)
-{
- int nfds;
- fd_set fds;
- struct timeval tv;
- struct sockaddr_in addr;
- socklen_t addrlen = sizeof(addr);
-
- if (!rfbScreen->httpDir)
- return;
-
- if (rfbScreen->httpListenSock < 0)
- return;
-
- FD_ZERO(&fds);
- FD_SET(rfbScreen->httpListenSock, &fds);
- if (rfbScreen->httpSock >= 0) {
- FD_SET(rfbScreen->httpSock, &fds);
- }
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- nfds = select(max(rfbScreen->httpSock,rfbScreen->httpListenSock) + 1, &fds, NULL, NULL, &tv);
- if (nfds == 0) {
- return;
- }
- if (nfds < 0) {
-#ifdef WIN32
- errno = WSAGetLastError();
-#endif
- if (errno != EINTR)
- rfbLogPerror("httpCheckFds: select");
- return;
- }
-
- if ((rfbScreen->httpSock >= 0) && FD_ISSET(rfbScreen->httpSock, &fds)) {
- httpProcessInput(rfbScreen);
- }
-
- if (FD_ISSET(rfbScreen->httpListenSock, &fds)) {
- int flags;
- if (rfbScreen->httpSock >= 0) close(rfbScreen->httpSock);
-
- if ((rfbScreen->httpSock = accept(rfbScreen->httpListenSock,
- (struct sockaddr *)&addr, &addrlen)) < 0) {
- rfbLogPerror("httpCheckFds: accept");
- return;
- }
-#ifdef __MINGW32__
- rfbErr("O_NONBLOCK on MinGW32 NOT IMPLEMENTED");
-#else
-#ifdef USE_LIBWRAP
- if(!hosts_ctl("vnc",STRING_UNKNOWN,inet_ntoa(addr.sin_addr),
- STRING_UNKNOWN)) {
- rfbLog("Rejected HTTP connection from client %s\n",
- inet_ntoa(addr.sin_addr));
-#else
- flags = fcntl(rfbScreen->httpSock, F_GETFL);
-
- if (flags < 0 || fcntl(rfbScreen->httpSock, F_SETFL, flags | O_NONBLOCK) == -1) {
- rfbLogPerror("httpCheckFds: fcntl");
-#endif
- close(rfbScreen->httpSock);
- rfbScreen->httpSock = -1;
- return;
- }
-
- flags=fcntl(rfbScreen->httpSock,F_GETFL);
- if(flags==-1 ||
- fcntl(rfbScreen->httpSock,F_SETFL,flags|O_NONBLOCK)==-1) {
- rfbLogPerror("httpCheckFds: fcntl");
- close(rfbScreen->httpSock);
- rfbScreen->httpSock=-1;
- return;
- }
-#endif
-
- /*AddEnabledDevice(httpSock);*/
- }
-}
-
-
-static void
-httpCloseSock(rfbScreenInfoPtr rfbScreen)
-{
- close(rfbScreen->httpSock);
- rfbScreen->httpSock = -1;
- buf_filled = 0;
-}
-
-static rfbClientRec cl;
-
-/*
- * httpProcessInput is called when input is received on the HTTP socket.
- */
-
-static void
-httpProcessInput(rfbScreenInfoPtr rfbScreen)
-{
- struct sockaddr_in addr;
- socklen_t addrlen = sizeof(addr);
- char fullFname[512];
- char params[1024];
- char *ptr;
- char *fname;
- unsigned int maxFnameLen;
- FILE* fd;
- rfbBool performSubstitutions = FALSE;
- char str[256+32];
-#ifndef WIN32
- char* user=getenv("USER");
-#endif
-
- cl.sock=rfbScreen->httpSock;
-
- if (strlen(rfbScreen->httpDir) > 255) {
- rfbErr("-httpd directory too long\n");
- httpCloseSock(rfbScreen);
- return;
- }
- strcpy(fullFname, rfbScreen->httpDir);
- fname = &fullFname[strlen(fullFname)];
- maxFnameLen = 511 - strlen(fullFname);
-
- buf_filled=0;
-
- /* Read data from the HTTP client until we get a complete request. */
- while (1) {
- ssize_t got;
-
- if (buf_filled > sizeof (buf)) {
- rfbErr("httpProcessInput: HTTP request is too long\n");
- httpCloseSock(rfbScreen);
- return;
- }
-
- got = read (rfbScreen->httpSock, buf + buf_filled,
- sizeof (buf) - buf_filled - 1);
-
- if (got <= 0) {
- if (got == 0) {
- rfbErr("httpd: premature connection close\n");
- } else {
- if (errno == EAGAIN) {
- return;
- }
- rfbLogPerror("httpProcessInput: read");
- }
- httpCloseSock(rfbScreen);
- return;
- }
-
- buf_filled += got;
- buf[buf_filled] = '\0';
-
- /* Is it complete yet (is there a blank line)? */
- if (strstr (buf, "\r\r") || strstr (buf, "\n\n") ||
- strstr (buf, "\r\n\r\n") || strstr (buf, "\n\r\n\r"))
- break;
- }
-
-
- /* Process the request. */
- if(rfbScreen->httpEnableProxyConnect) {
- const static char* PROXY_OK_STR = "HTTP/1.0 200 OK\r\nContent-Type: octet-stream\r\nPragma: no-cache\r\n\r\n";
- if(!strncmp(buf, "CONNECT ", 8)) {
- if(atoi(strchr(buf, ':')+1)!=rfbScreen->port) {
- rfbErr("httpd: CONNECT format invalid.\n");
- rfbWriteExact(&cl,INVALID_REQUEST_STR, strlen(INVALID_REQUEST_STR));
- httpCloseSock(rfbScreen);
- return;
- }
- /* proxy connection */
- rfbLog("httpd: client asked for CONNECT\n");
- rfbWriteExact(&cl,PROXY_OK_STR,strlen(PROXY_OK_STR));
- rfbNewClientConnection(rfbScreen,rfbScreen->httpSock);
- rfbScreen->httpSock = -1;
- return;
- }
- if (!strncmp(buf, "GET ",4) && !strncmp(strchr(buf,'/'),"/proxied.connection HTTP/1.", 27)) {
- /* proxy connection */
- rfbLog("httpd: client asked for /proxied.connection\n");
- rfbWriteExact(&cl,PROXY_OK_STR,strlen(PROXY_OK_STR));
- rfbNewClientConnection(rfbScreen,rfbScreen->httpSock);
- rfbScreen->httpSock = -1;
- return;
- }
- }
-
- if (strncmp(buf, "GET ", 4)) {
- rfbErr("httpd: no GET line\n");
- httpCloseSock(rfbScreen);
- return;
- } else {
- /* Only use the first line. */
- buf[strcspn(buf, "\n\r")] = '\0';
- }
-
- if (strlen(buf) > maxFnameLen) {
- rfbErr("httpd: GET line too long\n");
- httpCloseSock(rfbScreen);
- return;
- }
-
- if (sscanf(buf, "GET %s HTTP/1.", fname) != 1) {
- rfbErr("httpd: couldn't parse GET line\n");
- httpCloseSock(rfbScreen);
- return;
- }
-
- if (fname[0] != '/') {
- rfbErr("httpd: filename didn't begin with '/'\n");
- rfbWriteExact(&cl, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
- httpCloseSock(rfbScreen);
- return;
- }
-
- if (strchr(fname+1, '/') != NULL) {
- rfbErr("httpd: asking for file in other directory\n");
- rfbWriteExact(&cl, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
- httpCloseSock(rfbScreen);
- return;
- }
-
- getpeername(rfbScreen->httpSock, (struct sockaddr *)&addr, &addrlen);
- rfbLog("httpd: get '%s' for %s\n", fname+1,
- inet_ntoa(addr.sin_addr));
-
- /* Extract parameters from the URL string if necessary */
-
- params[0] = '\0';
- ptr = strchr(fname, '?');
- if (ptr != NULL) {
- *ptr = '\0';
- if (!parseParams(&ptr[1], params, 1024)) {
- params[0] = '\0';
- rfbErr("httpd: bad parameters in the URL\n");
- }
- }
-
-
- /* If we were asked for '/', actually read the file index.vnc */
-
- if (strcmp(fname, "/") == 0) {
- strcpy(fname, "/index.vnc");
- rfbLog("httpd: defaulting to '%s'\n", fname+1);
- }
-
- /* Substitutions are performed on files ending .vnc */
-
- if (strlen(fname) >= 4 && strcmp(&fname[strlen(fname)-4], ".vnc") == 0) {
- performSubstitutions = TRUE;
- }
-
- /* Open the file */
-
- if ((fd = fopen(fullFname, "r")) == 0) {
- rfbLogPerror("httpProcessInput: open");
- rfbWriteExact(&cl, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
- httpCloseSock(rfbScreen);
- return;
- }
-
- rfbWriteExact(&cl, OK_STR, strlen(OK_STR));
-
- while (1) {
- int n = fread(buf, 1, BUF_SIZE-1, fd);
- if (n < 0) {
- rfbLogPerror("httpProcessInput: read");
- fclose(fd);
- httpCloseSock(rfbScreen);
- return;
- }
-
- if (n == 0)
- break;
-
- if (performSubstitutions) {
-
- /* Substitute $WIDTH, $HEIGHT, etc with the appropriate values.
- This won't quite work properly if the .vnc file is longer than
- BUF_SIZE, but it's reasonable to assume that .vnc files will
- always be short. */
-
- char *ptr = buf;
- char *dollar;
- buf[n] = 0; /* make sure it's null-terminated */
-
- while ((dollar = strchr(ptr, '$'))!=NULL) {
- rfbWriteExact(&cl, ptr, (dollar - ptr));
-
- ptr = dollar;
-
- if (compareAndSkip(&ptr, "$WIDTH")) {
-
- sprintf(str, "%d", rfbScreen->width);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$HEIGHT")) {
-
- sprintf(str, "%d", rfbScreen->height);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$APPLETWIDTH")) {
-
- sprintf(str, "%d", rfbScreen->width);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$APPLETHEIGHT")) {
-
- sprintf(str, "%d", rfbScreen->height + 32);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$PORT")) {
-
- sprintf(str, "%d", rfbScreen->port);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$DESKTOP")) {
-
- rfbWriteExact(&cl, rfbScreen->desktopName, strlen(rfbScreen->desktopName));
-
- } else if (compareAndSkip(&ptr, "$DISPLAY")) {
-
- sprintf(str, "%s:%d", rfbScreen->thisHost, rfbScreen->port-5900);
- rfbWriteExact(&cl, str, strlen(str));
-
- } else if (compareAndSkip(&ptr, "$USER")) {
-#ifndef WIN32
- if (user) {
- rfbWriteExact(&cl, user,
- strlen(user));
- } else
-#endif
- rfbWriteExact(&cl, "?", 1);
- } else if (compareAndSkip(&ptr, "$PARAMS")) {
- if (params[0] != '\0')
- rfbWriteExact(&cl, params, strlen(params));
- } else {
- if (!compareAndSkip(&ptr, "$$"))
- ptr++;
-
- if (rfbWriteExact(&cl, "$", 1) < 0) {
- fclose(fd);
- httpCloseSock(rfbScreen);
- return;
- }
- }
- }
- if (rfbWriteExact(&cl, ptr, (&buf[n] - ptr)) < 0)
- break;
-
- } else {
-
- /* For files not ending .vnc, just write out the buffer */
-
- if (rfbWriteExact(&cl, buf, n) < 0)
- break;
- }
- }
-
- fclose(fd);
- httpCloseSock(rfbScreen);
-}
-
-
-static rfbBool
-compareAndSkip(char **ptr, const char *str)
-{
- if (strncmp(*ptr, str, strlen(str)) == 0) {
- *ptr += strlen(str);
- return TRUE;
- }
-
- return FALSE;
-}
-
-/*
- * Parse the request tail after the '?' character, and format a sequence
- * of <param> tags for inclusion into an HTML page with embedded applet.
- */
-
-static rfbBool
-parseParams(const char *request, char *result, int max_bytes)
-{
- char param_request[128];
- char param_formatted[196];
- const char *tail;
- char *delim_ptr;
- char *value_str;
- int cur_bytes, len;
-
- result[0] = '\0';
- cur_bytes = 0;
-
- tail = request;
- for (;;) {
- /* Copy individual "name=value" string into a buffer */
- delim_ptr = strchr((char *)tail, '&');
- if (delim_ptr == NULL) {
- if (strlen(tail) >= sizeof(param_request)) {
- return FALSE;
- }
- strcpy(param_request, tail);
- } else {
- len = delim_ptr - tail;
- if (len >= sizeof(param_request)) {
- return FALSE;
- }
- memcpy(param_request, tail, len);
- param_request[len] = '\0';
- }
-
- /* Split the request into parameter name and value */
- value_str = strchr(¶m_request[1], '=');
- if (value_str == NULL) {
- return FALSE;
- }
- *value_str++ = '\0';
- if (strlen(value_str) == 0) {
- return FALSE;
- }
-
- /* Validate both parameter name and value */
- if (!validateString(param_request) || !validateString(value_str)) {
- return FALSE;
- }
-
- /* Prepare HTML-formatted representation of the name=value pair */
- len = sprintf(param_formatted,
- "<PARAM NAME=\"%s\" VALUE=\"%s\">\n",
- param_request, value_str);
- if (cur_bytes + len + 1 > max_bytes) {
- return FALSE;
- }
- strcat(result, param_formatted);
- cur_bytes += len;
-
- /* Go to the next parameter */
- if (delim_ptr == NULL) {
- break;
- }
- tail = delim_ptr + 1;
- }
- return TRUE;
-}
-
-/*
- * Check if the string consists only of alphanumeric characters, '+'
- * signs, underscores, and dots. Replace all '+' signs with spaces.
- */
-
-static rfbBool
-validateString(char *str)
-{
- char *ptr;
-
- for (ptr = str; *ptr != '\0'; ptr++) {
- if (!isalnum(*ptr) && *ptr != '_' && *ptr != '.') {
- if (*ptr == '+') {
- *ptr = ' ';
- } else {
- return FALSE;
- }
- }
- }
- return TRUE;
-}
-
projects / presencevnc / blobdiff