From d7c0b34b62c8edd302e273588bae7467ecbfb987 Mon Sep 17 00:00:00 2001
From: Ben Klopfenstein <benklop@gmail.com>
Date: Tue, 12 May 2009 01:51:23 +0200
Subject: libvncclient: Unix sockets support by Ben Klopfenstein

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 libvncclient/rfbproto.c | 29 ++++++++++++++++++++++++-----
 libvncclient/sockets.c  | 29 +++++++++++++++++++++++++++++
 rfb/rfbclient.h         |  1 +
 3 files changed, 54 insertions(+), 5 deletions(-)

diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index 07584f6..5a83e47 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -29,6 +29,8 @@
 #endif
 #ifndef WIN32
 #include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #else
 #define strncasecmp _strnicmp
 #endif
@@ -342,6 +344,15 @@ DefaultSupportedMessagesTightVNC(rfbClient* client)
     SetServer2Client(client, rfbTextChat);
 }
 
+static rfbBool
+IsUnixSocket(const char *name)
+{
+  struct stat sb;
+  if(stat(name, &sb) && (sb.st_mode & S_IFMT) == S_IFSOCK)
+    return TRUE;
+  return FALSE;
+}
+
 /*
  * ConnectToRFBServer.
  */
@@ -378,13 +389,21 @@ ConnectToRFBServer(rfbClient* client,const char *hostname, int port)
     return TRUE;
   }
 
-  if (!StringToIPAddr(hostname, &host)) {
-    rfbClientLog("Couldn't convert '%s' to host address\n", hostname);
-    return FALSE;
+#ifndef WIN32
+  if(IsUnixSocket(hostname))
+    /* serverHost is a UNIX socket. */
+    client->sock = ConnectClientToUnixSock(hostname);
+  else
+#endif
+  {
+    /* serverHost is a hostname */
+    if (!StringToIPAddr(hostname, &host)) {
+      rfbClientLog("Couldn't convert '%s' to host address\n", hostname);
+      return FALSE;
+    }
+    client->sock = ConnectClientToTcpAddr(host, port);
   }
 
-  client->sock = ConnectClientToTcpAddr(host, port);
-
   if (client->sock < 0) {
     rfbClientLog("Unable to connect to VNC server\n");
     return FALSE;
diff --git a/libvncclient/sockets.c b/libvncclient/sockets.c
index 7f350e2..5cfc743 100644
--- a/libvncclient/sockets.c
+++ b/libvncclient/sockets.c
@@ -38,6 +38,7 @@
 #else
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <sys/un.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
 #include <netdb.h>
@@ -297,6 +298,34 @@ ConnectClientToTcpAddr(unsigned int host, int port)
   return sock;
 }
 
+int
+ConnectClientToUnixSock(const char *sockFile)
+{
+#ifdef WIN32
+  rfbClientErr("Windows doesn't support UNIX sockets\n");
+  return -1;
+#else
+  int sock;
+  struct sockaddr_un addr;
+  addr.sun_family = AF_UNIX;
+  strcpy(addr.sun_path, sockFile);
+
+  sock = socket(AF_UNIX, SOCK_STREAM, 0);
+  if (sock < 0) {
+    rfbClientErr("ConnectToUnixSock: socket (%s)\n",strerror(errno));
+    return -1;
+  }
+
+  if (connect(sock, (struct sockaddr *)&addr, sizeof(addr.sun_family) + strlen(addr.sun_path)) < 0) {
+    rfbClientErr("ConnectToUnixSock: connect\n");
+    close(sock);
+    return -1;
+  }
+
+  return sock;
+#endif
+}
+
 
 
 /*
diff --git a/rfb/rfbclient.h b/rfb/rfbclient.h
index b92f220..be6f322 100644
--- a/rfb/rfbclient.h
+++ b/rfb/rfbclient.h
@@ -314,6 +314,7 @@ extern rfbBool WriteToRFBServer(rfbClient* client, char *buf, int n);
 extern int FindFreeTcpPort(void);
 extern int ListenAtTcpPort(int port);
 extern int ConnectClientToTcpAddr(unsigned int host, int port);
+extern int ConnectClientToUnixSock(const char *sockFile);
 extern int AcceptTcpConnection(int listenSock);
 extern rfbBool SetNonBlocking(int sock);
 
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