IPv6 support for LibVNCServer, part two: Let the http server listen on IPv6, too.

As done with the RFB sockets, this uses a separate-socket approach as well.

libvncserver/cargs.c

@@ -45,6 +45,9 @@ rfbUsage(void)
                                                                 "instead)\n");
     fprintf(stderr, "-httpdir dir-path      enable http server using dir-path home\n");
     fprintf(stderr, "-httpport portnum      use portnum for http connection\n");
+#ifdef LIBVNCSERVER_IPv6
+    fprintf(stderr, "-httpportv6 portnum    use portnum for IPv6 http connection\n");
+#endif
     fprintf(stderr, "-enablehttpproxy       enable http proxy support\n");
     fprintf(stderr, "-progressive height    enable progressive updating for slow links\n");
     fprintf(stderr, "-listen ipaddr         listen for connections only on network interface with\n");
@@ -162,6 +165,14 @@ rfbProcessArguments(rfbScreenInfoPtr rfbScreen,int* argc, char *argv[])
 		return FALSE;
 	    }
             rfbScreen->httpPort = atoi(argv[++i]);
+#ifdef LIBVNCSERVER_IPv6
+	} else if (strcmp(argv[i], "-httpportv6") == 0) {  /* -httpportv6 portnum */
+            if (i + 1 >= *argc) {
+		rfbUsage();
+		return FALSE;
+	    }
+            rfbScreen->http6Port = atoi(argv[++i]);
+#endif
         } else if (strcmp(argv[i], "-enablehttpproxy") == 0) {
             rfbScreen->httpEnableProxyConnect = TRUE;
         } else if (strcmp(argv[i], "-progressive") == 0) {  /* -httpport portnum */

libvncserver/httpd.c

@@ -102,17 +102,27 @@ rfbHttpInitSockets(rfbScreenInfoPtr rfbScreen)
 	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;
     }
+    rfbLog("Listening for HTTP connections on TCP port %d\n", rfbScreen->httpPort);
+    rfbLog("  URL http://%s:%d\n",rfbScreen->thisHost,rfbScreen->httpPort);
+
+#ifdef LIBVNCSERVER_IPv6
+    if (rfbScreen->http6Port == 0) {
+	rfbScreen->http6Port = rfbScreen->ipv6port-100;
+    }
 
-   /*AddEnabledDevice(httpListenSock);*/
+    if ((rfbScreen->httpListen6Sock
+	 = rfbListenOnTCP6Port(rfbScreen->http6Port, rfbScreen->listen6Interface)) < 0) {
+      /* ListenOnTCP6Port has its own detailed error printout */
+      return;
+    }
+    rfbLog("Listening for HTTP connections on TCP6 port %d\n", rfbScreen->http6Port);
+    rfbLog("  URL http://%s:%d\n",rfbScreen->thisHost,rfbScreen->http6Port);
+#endif
 }
 
 void rfbHttpShutdownSockets(rfbScreenInfoPtr rfbScreen) {
@@ -121,6 +131,18 @@ void rfbHttpShutdownSockets(rfbScreenInfoPtr rfbScreen) {
 	FD_CLR(rfbScreen->httpSock,&rfbScreen->allFds);
 	rfbScreen->httpSock=-1;
     }
+
+    if(rfbScreen->httpListenSock>-1) {
+	close(rfbScreen->httpListenSock);
+	FD_CLR(rfbScreen->httpListenSock,&rfbScreen->allFds);
+	rfbScreen->httpListenSock=-1;
+    }
+
+    if(rfbScreen->httpListen6Sock>-1) {
+	close(rfbScreen->httpListen6Sock);
+	FD_CLR(rfbScreen->httpListen6Sock,&rfbScreen->allFds);
+	rfbScreen->httpListen6Sock=-1;
+    }
 }
 
 /*
@@ -134,7 +156,11 @@ rfbHttpCheckFds(rfbScreenInfoPtr rfbScreen)
     int nfds;
     fd_set fds;
     struct timeval tv;
+#ifdef LIBVNCSERVER_IPv6
+    struct sockaddr_storage addr;
+#else
     struct sockaddr_in addr;
+#endif
     socklen_t addrlen = sizeof(addr);
 
     if (!rfbScreen->httpDir)
@@ -145,12 +171,15 @@ rfbHttpCheckFds(rfbScreenInfoPtr rfbScreen)
 
     FD_ZERO(&fds);
     FD_SET(rfbScreen->httpListenSock, &fds);
+    if (rfbScreen->httpListen6Sock >= 0) {
+	FD_SET(rfbScreen->httpListen6Sock, &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);
+    nfds = select(max(rfbScreen->httpListen6Sock, max(rfbScreen->httpSock,rfbScreen->httpListenSock)) + 1, &fds, NULL, NULL, &tv);
     if (nfds == 0) {
 	return;
     }
@@ -167,19 +196,36 @@ rfbHttpCheckFds(rfbScreenInfoPtr rfbScreen)
 	httpProcessInput(rfbScreen);
     }
 
-    if (FD_ISSET(rfbScreen->httpListenSock, &fds)) {
+    if (FD_ISSET(rfbScreen->httpListenSock, &fds) || FD_ISSET(rfbScreen->httpListen6Sock, &fds)) {
 	if (rfbScreen->httpSock >= 0) close(rfbScreen->httpSock);
 
-	if ((rfbScreen->httpSock = accept(rfbScreen->httpListenSock,
-			       (struct sockaddr *)&addr, &addrlen)) < 0) {
+	if(FD_ISSET(rfbScreen->httpListenSock, &fds)) {
+	    if ((rfbScreen->httpSock = accept(rfbScreen->httpListenSock, (struct sockaddr *)&addr, &addrlen)) < 0) {
+	      rfbLogPerror("httpCheckFds: accept");
+	      return;
+	    }
+	}
+	else if(FD_ISSET(rfbScreen->httpListen6Sock, &fds)) {
+	    if ((rfbScreen->httpSock = accept(rfbScreen->httpListen6Sock, (struct sockaddr *)&addr, &addrlen)) < 0) {
 	      rfbLogPerror("httpCheckFds: accept");
 	      return;
 	    }
+	}
+
 #ifdef USE_LIBWRAP
-	if(!hosts_ctl("vnc",STRING_UNKNOWN,inet_ntoa(addr.sin_addr),
+	char host[1024];
+#ifdef LIBVNCSERVER_IPv6
+	if(getnameinfo((struct sockaddr*)&addr, addrlen, host, sizeof(host), NULL, 0, NI_NUMERICHOST) != 0) {
+	  rfbLogPerror("httpCheckFds: error in getnameinfo");
+	  host[0] = '\0';
+	}
+#else
+	memcpy(host, inet_ntoa(addr.sin_addr), sizeof(host));
+#endif
+	if(!hosts_ctl("vnc",STRING_UNKNOWN, host,
 		      STRING_UNKNOWN)) {
 	  rfbLog("Rejected HTTP connection from client %s\n",
-		 inet_ntoa(addr.sin_addr));
+		 host);
 	  close(rfbScreen->httpSock);
 	  rfbScreen->httpSock=-1;
 	  return;
@@ -212,7 +258,11 @@ static rfbClientRec cl;
 static void
 httpProcessInput(rfbScreenInfoPtr rfbScreen)
 {
+#ifdef LIBVNCSERVER_IPv6
+    struct sockaddr_storage addr;
+#else
     struct sockaddr_in addr;
+#endif
     socklen_t addrlen = sizeof(addr);
     char fullFname[512];
     char params[1024];
@@ -335,8 +385,16 @@ httpProcessInput(rfbScreenInfoPtr rfbScreen)
 
 
     getpeername(rfbScreen->httpSock, (struct sockaddr *)&addr, &addrlen);
+#ifdef LIBVNCSERVER_IPv6
+    char host[1024];
+    if(getnameinfo((struct sockaddr*)&addr, addrlen, host, sizeof(host), NULL, 0, NI_NUMERICHOST) != 0) {
+      rfbLogPerror("httpProcessInput: error in getnameinfo");
+    }
+    rfbLog("httpd: get '%s' for %s\n", fname+1, host);
+#else
     rfbLog("httpd: get '%s' for %s\n", fname+1,
 	   inet_ntoa(addr.sin_addr));
+#endif
 
     /* Extract parameters from the URL string if necessary */
 
@@ -562,7 +620,8 @@ parseParams(const char *request, char *result, int max_bytes)
 
 /*
  * Check if the string consists only of alphanumeric characters, '+'
- * signs, underscores, and dots. Replace all '+' signs with spaces.
+ * signs, underscores, dots, colons and square brackets.
+ * Replace all '+' signs with spaces.
  */
 
 static rfbBool
@@ -571,7 +630,8 @@ validateString(char *str)
     char *ptr;
 
     for (ptr = str; *ptr != '\0'; ptr++) {
-	if (!isalnum(*ptr) && *ptr != '_' && *ptr != '.') {
+	if (!isalnum(*ptr) && *ptr != '_' && *ptr != '.'
+	    && *ptr != ':' && *ptr != '[' && *ptr != ']' ) {
 	    if (*ptr == '+') {
 		*ptr = ' ';
 	    } else {

libvncserver/main.c

@@ -843,8 +843,10 @@ rfbScreenInfoPtr rfbGetScreen(int* argc,char** argv,
    screen->httpInitDone=FALSE;
    screen->httpEnableProxyConnect=FALSE;
    screen->httpPort=0;
+   screen->http6Port=0;
    screen->httpDir=NULL;
    screen->httpListenSock=-1;
+   screen->httpListen6Sock=-1;
    screen->httpSock=-1;
 
    screen->desktopName = "LibVNCServer";

rfb/rfb.h

@@ -383,6 +383,8 @@ typedef struct _rfbScreenInfo
        don't support dual binding sockets under *any* circumstances, for
        instance OpenBSD */
     SOCKET listen6Sock;
+    int http6Port;
+    SOCKET httpListen6Sock;
 } rfbScreenInfo, *rfbScreenInfoPtr;