You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
424 lines
9.8 KiB
424 lines
9.8 KiB
/*
|
|
* httpd.c - a simple HTTP server
|
|
*/
|
|
|
|
/*
|
|
* 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 <sys/types.h>
|
|
#ifdef WIN32
|
|
#include <winsock.h>
|
|
#define close closesocket
|
|
#else
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/tcp.h>
|
|
#include <netdb.h>
|
|
#include <pwd.h>
|
|
#include <arpa/inet.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#ifdef __osf__
|
|
typedef int socklen_t;
|
|
#endif
|
|
|
|
#ifdef USE_LIBWRAP
|
|
#include <tcpd.h>
|
|
#endif
|
|
|
|
#include "rfb.h"
|
|
|
|
#define NOT_FOUND_STR "HTTP/1.0 404 Not found\n\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\nContent-Type: text/html\n\n"
|
|
|
|
static void httpProcessInput();
|
|
static Bool compareAndSkip(char **ptr, const char *str);
|
|
|
|
/*
|
|
int httpPort = 0;
|
|
char *httpDir = NULL;
|
|
|
|
int httpListenSock = -1;
|
|
int httpSock = -1;
|
|
FILE* httpFP = NULL;
|
|
*/
|
|
|
|
#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
|
|
httpInitSockets(rfbScreenInfoPtr rfbScreen)
|
|
{
|
|
if (rfbScreen->httpInitDone)
|
|
return;
|
|
|
|
rfbScreen->httpInitDone = TRUE;
|
|
|
|
if (!rfbScreen->httpDir)
|
|
return;
|
|
|
|
if (rfbScreen->httpPort == 0) {
|
|
rfbScreen->httpPort = rfbScreen->rfbPort-100;
|
|
}
|
|
|
|
rfbLog("Listening for HTTP connections on TCP port %d\n", rfbScreen->httpPort);
|
|
|
|
rfbLog(" URL http://%s:%d\n",rfbScreen->rfbThisHost,rfbScreen->httpPort);
|
|
|
|
if ((rfbScreen->httpListenSock = ListenOnTCPPort(rfbScreen->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(rfbScreenInfoPtr rfbScreen)
|
|
{
|
|
int nfds;
|
|
fd_set fds;
|
|
struct timeval tv;
|
|
struct sockaddr_in addr;
|
|
size_t addrlen = sizeof(addr);
|
|
|
|
if (!rfbScreen->httpDir)
|
|
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
|
|
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 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));
|
|
#else
|
|
if ((rfbScreen->httpFP = fdopen(rfbScreen->httpSock, "r+")) == NULL) {
|
|
rfbLogPerror("httpCheckFds: fdopen");
|
|
#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;
|
|
}
|
|
|
|
/*AddEnabledDevice(httpSock);*/
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
httpCloseSock(rfbScreenInfoPtr rfbScreen)
|
|
{
|
|
fclose(rfbScreen->httpFP);
|
|
rfbScreen->httpFP = NULL;
|
|
/*RemoveEnabledDevice(httpSock);*/
|
|
rfbScreen->httpSock = -1;
|
|
}
|
|
|
|
static rfbClientRec cl;
|
|
|
|
/*
|
|
* httpProcessInput is called when input is received on the HTTP socket.
|
|
*/
|
|
|
|
static void
|
|
httpProcessInput(rfbScreenInfoPtr rfbScreen)
|
|
{
|
|
struct sockaddr_in addr;
|
|
size_t addrlen = sizeof(addr);
|
|
char fullFname[256];
|
|
char *fname;
|
|
unsigned int maxFnameLen;
|
|
FILE* fd;
|
|
Bool performSubstitutions = FALSE;
|
|
char str[256];
|
|
#ifndef WIN32
|
|
struct passwd *user = getpwuid(getuid());
|
|
#endif
|
|
|
|
cl.sock=rfbScreen->httpSock;
|
|
|
|
if (strlen(rfbScreen->httpDir) > 200) {
|
|
rfbLog("-httpd directory too long\n");
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
strcpy(fullFname, rfbScreen->httpDir);
|
|
fname = &fullFname[strlen(fullFname)];
|
|
maxFnameLen = 255 - strlen(fullFname);
|
|
|
|
/* Read data from the HTTP client until we get a complete request. */
|
|
while (1) {
|
|
ssize_t got = read (rfbScreen->httpSock, buf + buf_filled,
|
|
sizeof (buf) - buf_filled - 1);
|
|
|
|
if (got <= 0) {
|
|
if (got == 0) {
|
|
rfbLog("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 (strncmp(buf, "GET ", 4)) {
|
|
rfbLog("no GET line\n");
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
} else {
|
|
/* Only use the first line. */
|
|
buf[strcspn(buf, "\n\r")] = '\0';
|
|
}
|
|
|
|
if (strlen(buf) > maxFnameLen) {
|
|
rfbLog("GET line too long\n");
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
|
|
if (sscanf(buf, "GET %s HTTP/1.0", fname) != 1) {
|
|
rfbLog("couldn't parse GET line\n");
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
|
|
if (fname[0] != '/') {
|
|
rfbLog("filename didn't begin with '/'\n");
|
|
WriteExact(&cl, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
|
|
if (strchr(fname+1, '/') != NULL) {
|
|
rfbLog("asking for file in other directory\n");
|
|
WriteExact(&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));
|
|
|
|
/* 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");
|
|
WriteExact(&cl, NOT_FOUND_STR, strlen(NOT_FOUND_STR));
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
|
|
WriteExact(&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) {
|
|
WriteExact(&cl, ptr, (dollar - ptr));
|
|
|
|
ptr = dollar;
|
|
|
|
if (compareAndSkip(&ptr, "$WIDTH")) {
|
|
|
|
sprintf(str, "%d", rfbScreen->width);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$HEIGHT")) {
|
|
|
|
sprintf(str, "%d", rfbScreen->height);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$APPLETWIDTH")) {
|
|
|
|
sprintf(str, "%d", rfbScreen->width);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$APPLETHEIGHT")) {
|
|
|
|
sprintf(str, "%d", rfbScreen->height + 32);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$PORT")) {
|
|
|
|
sprintf(str, "%d", rfbScreen->rfbPort);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$DESKTOP")) {
|
|
|
|
WriteExact(&cl, rfbScreen->desktopName, strlen(rfbScreen->desktopName));
|
|
|
|
} else if (compareAndSkip(&ptr, "$DISPLAY")) {
|
|
|
|
sprintf(str, "%s:%d", rfbScreen->rfbThisHost, rfbScreen->rfbPort-5900);
|
|
WriteExact(&cl, str, strlen(str));
|
|
|
|
} else if (compareAndSkip(&ptr, "$USER")) {
|
|
#ifndef WIN32
|
|
if (user) {
|
|
WriteExact(&cl, user->pw_name,
|
|
strlen(user->pw_name));
|
|
} else
|
|
#endif
|
|
WriteExact(&cl, "?", 1);
|
|
} else {
|
|
if (!compareAndSkip(&ptr, "$$"))
|
|
ptr++;
|
|
|
|
if (WriteExact(&cl, "$", 1) < 0) {
|
|
fclose(fd);
|
|
httpCloseSock(rfbScreen);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (WriteExact(&cl, ptr, (&buf[n] - ptr)) < 0)
|
|
break;
|
|
|
|
} else {
|
|
|
|
/* For files not ending .vnc, just write out the buffer */
|
|
|
|
if (WriteExact(&cl, buf, n) < 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
fclose(fd);
|
|
httpCloseSock(rfbScreen);
|
|
}
|
|
|
|
|
|
static Bool
|
|
compareAndSkip(char **ptr, const char *str)
|
|
{
|
|
if (strncmp(*ptr, str, strlen(str)) == 0) {
|
|
*ptr += strlen(str);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|