--- /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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pwd.h>
+
+#include "rfb.h"
+
+#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 OK_STR "HTTP/1.0 200 OK\r\n\r\n"
+
+static void httpProcessInput();
+static Bool compareAndSkip(char **ptr, const char *str);
+
+int httpPort = 0;
+char *httpDir = NULL;
+
+int httpListenSock = -1;
+int httpSock = -1;
+
+#define BUF_SIZE 32768
+
+static char buf[BUF_SIZE];
+static int bufLen;
+
+
+/*
+ * httpInitSockets sets up the TCP socket to listen for HTTP connections.
+ */
+
+void httpInitSockets()
+{
+ static Bool done = FALSE;
+
+ if (done)
+ return;
+
+ done = TRUE;
+
+ if (!httpDir)
+ return;
+
+ if (httpPort == 0) {
+ httpPort = 5800 + atoi(display);
+ }
+
+ rfbLog("Listening for HTTP connections on TCP port %d\n", httpPort);
+
+ rfbLog(" URL http://%s:%d\n",rfbThisHost,httpPort);
+
+ if ((httpListenSock = ListenOnTCPPort(httpPort)) < 0) {
+ rfbLogPerror("ListenOnTCPPort");
+ exit(1);
+ }
+
+ AddEnabledDevice(httpListenSock);
+}
+
+
+/*
+ * httpCheckFds is called from ProcessInputEvents to check for input on the
+ * HTTP socket(s). If there is input to process, httpProcessInput is called.
+ */
+
+void httpCheckFds()
+{
+ int nfds;
+ fd_set fds;
+ struct timeval tv;
+ struct sockaddr_in addr;
+ unsigned int addrlen = sizeof(addr);
+ int flags;
+
+ if (!httpDir)
+ return;
+
+ FD_ZERO(&fds);
+ FD_SET(httpListenSock, &fds);
+ if (httpSock >= 0) {
+ FD_SET(httpSock, &fds);
+ }
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ nfds = select(max(httpSock,httpListenSock) + 1, &fds, NULL, NULL, &tv);
+ if (nfds == 0) {
+ return;
+ }
+ if (nfds < 0) {
+ rfbLogPerror("httpCheckFds: select");
+ return;
+ }
+
+ if ((httpSock >= 0) && FD_ISSET(httpSock, &fds)) {
+ httpProcessInput();
+ }
+
+ if (FD_ISSET(httpListenSock, &fds)) {
+
+ if (httpSock >= 0) close(httpSock);
+
+ if ((httpSock = accept(httpListenSock,
+ (struct sockaddr *)&addr, &addrlen)) < 0) {
+ rfbLogPerror("httpCheckFds: accept");
+ return;
+ }
+
+ flags = fcntl(httpSock, F_GETFL);
+
+ if (flags < 0 || fcntl(httpSock, F_SETFL, flags | O_NONBLOCK) == -1) {
+ rfbLogPerror("httpCheckFds: fcntl");
+ close(httpSock);
+ httpSock = -1;
+ return;
+ }
+
+ AddEnabledDevice(httpSock);
+ bufLen = 0;
+ }
+}
+
+
+static void httpCloseSock()
+{
+ close(httpSock);
+ RemoveEnabledDevice(httpSock);
+ httpSock = -1;
+}
+
+
+/*
+ * httpProcessInput is called when input is received on the HTTP socket. We
+ * read lines from the HTTP client until we get a blank line (the end of an
+ * HTTP request). The socket is non-blocking so we return if there's no more
+ * to read and will carry on where we left off when more data is available.
+ */
+
+static void httpProcessInput()
+{
+ struct sockaddr_in addr;
+ unsigned int addrlen = sizeof(addr);
+ char fullFname[256];
+ char *fname;
+ int maxFnameLen;
+ int fd;
+ Bool performSubstitutions = FALSE;
+ char str[256];
+ struct passwd *user = getpwuid(getuid());
+ int n;
+
+ if (strlen(httpDir) > 200) {
+ rfbLog("-httpd directory too long\n");
+ httpCloseSock();
+ return;
+ }
+ strcpy(fullFname, httpDir);
+ fname = &fullFname[strlen(fullFname)];
+ maxFnameLen = 255 - strlen(fullFname);
+
+ while (1) {
+ if (bufLen >= BUF_SIZE-1) {
+ rfbLog("httpProcessInput: HTTP request is too long\n");
+ httpCloseSock();
+ return;
+ }
+
+ n = read(httpSock, buf + bufLen, BUF_SIZE - bufLen - 1);
+
+ if (n <= 0) {
+ if (n < 0) {
+ if (errno == EAGAIN) return;
+ rfbLogPerror("httpProcessInput: read");
+ } else {
+ rfbLog("httpProcessInput: connection closed\n");
+ }
+ httpCloseSock();
+ return;
+ }
+
+ bufLen += n;
+ buf[bufLen] = 0;
+
+ if (strstr(buf, "\r\r") || strstr(buf, "\n\n") ||
+ strstr(buf, "\r\n\r\n") || strstr(buf, "\n\r\n\r"))
+ break;
+ }
+
+ if (strncmp(buf, "GET ", 4) != 0) {
+ rfbLog("httpProcessInput: first line wasn't a GET?\n");
+ httpCloseSock();
+ return;
+ }
+
+ buf[strcspn(buf, "\r\n")] = 0; /* only want first line */
+
+ if (strlen(buf) > maxFnameLen) {
+ rfbLog("httpProcessInput: GET line too long\n");
+ httpCloseSock();
+ return;
+ }
+
+ if (sscanf(buf, "GET %s HTTP", fname) != 1) {
+ rfbLog("httpProcessInput: couldn't parse GET line\n");
+ httpCloseSock();
+ return;
+ }
+
+ if (fname[0] != '/') {
+ rfbLog("httpProcessInput: filename didn't begin with '/'\n");
+ WriteExact(httpSock, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
+ httpCloseSock();
+ return;
+ }
+
+ if (strchr(fname+1, '/') != NULL) {
+ rfbLog("httpProcessInput: asking for file in other directory\n");
+ WriteExact(httpSock, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
+ httpCloseSock();
+ return;
+ }
+
+ getpeername(httpSock, (struct sockaddr *)&addr, &addrlen);
+ rfbLog("httpd: get '%s' for %s\n", fname+1,
+ inet_ntoa(addr.sin_addr));
+
+ /* 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 = open(fullFname, O_RDONLY)) < 0) {
+ rfbLogPerror("httpProcessInput: open");
+ WriteExact(httpSock, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
+ httpCloseSock();
+ return;
+ }
+
+ WriteExact(httpSock, OK_STR, strlen(OK_STR));
+
+ while (1) {
+ int n = read(fd, buf, BUF_SIZE-1);
+ if (n < 0) {
+ rfbLogPerror("httpProcessInput: read");
+ close(fd);
+ httpCloseSock();
+ return;
+ }
+
+ if (n == 0)
+ break;
+
+ if (performSubstitutions) {
+
+ /* Substitute $WIDTH, $HEIGHT, etc with the appropriate values.
+ This won't quite work properly if the .vnc file is longer than
+ BUF_SIZE, but it's reasonable to assume that .vnc files will
+ always be short. */
+
+ char *ptr = buf;
+ char *dollar;
+ buf[n] = 0; /* make sure it's null-terminated */
+
+ while ((dollar = strchr(ptr, '$'))) {
+ WriteExact(httpSock, ptr, (dollar - ptr));
+
+ ptr = dollar;
+
+ if (compareAndSkip(&ptr, "$WIDTH")) {
+
+ sprintf(str, "%d", rfbScreen.width);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$HEIGHT")) {
+
+ sprintf(str, "%d", rfbScreen.height);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$APPLETWIDTH")) {
+
+ sprintf(str, "%d", rfbScreen.width);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$APPLETHEIGHT")) {
+
+ sprintf(str, "%d", rfbScreen.height + 32);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$PORT")) {
+
+ sprintf(str, "%d", rfbPort);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$DESKTOP")) {
+
+ WriteExact(httpSock, desktopName, strlen(desktopName));
+
+ } else if (compareAndSkip(&ptr, "$DISPLAY")) {
+
+ sprintf(str, "%s:%s", rfbThisHost, display);
+ WriteExact(httpSock, str, strlen(str));
+
+ } else if (compareAndSkip(&ptr, "$USER")) {
+
+ if (user) {
+ WriteExact(httpSock, user->pw_name,
+ strlen(user->pw_name));
+ } else {
+ WriteExact(httpSock, "?", 1);
+ }
+
+ } else {
+ if (!compareAndSkip(&ptr, "$$"))
+ ptr++;
+
+ if (WriteExact(httpSock, "$", 1) < 0) {
+ close(fd);
+ httpCloseSock();
+ return;
+ }
+ }
+ }
+ if (WriteExact(httpSock, ptr, (&buf[n] - ptr)) < 0)
+ break;
+
+ } else {
+
+ /* For files not ending .vnc, just write out the buffer */
+
+ if (WriteExact(httpSock, buf, n) < 0)
+ break;
+ }
+ }
+
+ close(fd);
+ httpCloseSock();
+}
+
+
+static Bool
+compareAndSkip(char **ptr, const char *str)
+{
+ if (strncmp(*ptr, str, strlen(str)) == 0) {
+ *ptr += strlen(str);
+ return TRUE;
+ }
+
+ return FALSE;
+}
projects / rdpsrv / blobdiff