Fix compilation on OSX.

- /proc/net/route is Linux only.
- lsif() will work anywhere SIOCGIFCONF is defined.
- Abstract namespace UNIX domain sockets are Linux only.
- Rework code to reduce indent levels.

lsif.c

@@ -61,6 +61,7 @@
 #define SIOCGIFBRDADDR OSIOCGIFBRDADDR
 #endif
 
+#ifdef linux
 /* for when all other options fail, as can happen on Android,
    if the permissions for the socket-based method are broken.
    Down side is that it while it gets the interface name and
@@ -97,8 +98,9 @@ int scrapeProcNetRoute()
   fclose(f);
   return 0;
 }
+#endif
 
-#ifdef ANDROID
+#ifdef SIOCGIFCONF
 int lsif(void)
 {
   char            buf[8192] = {0};

monitor.c

@@ -70,50 +70,61 @@ int monitor_setup_sockets()
   struct sockaddr_un name;
   int len;
   
+  bzero(&name, sizeof(name));
   name.sun_family = AF_UNIX;
   
-  if (monitor_named_socket==-1) {
+  if (monitor_named_socket!=-1)
-    /* ignore SIGPIPE so that we don't explode */
+      return 0;
-    signal(SIGPIPE, SIG_IGN);
+  
-
+  /* ignore SIGPIPE so that we don't explode */
-    name.sun_path[0]=0;
+  signal(SIGPIPE, SIG_IGN);
-    snprintf(&name.sun_path[1],100,"org.servalproject.servald.monitor.socket");
+  if ((monitor_named_socket = socket(AF_UNIX, SOCK_STREAM, 0))==-1) {
-    if (name.sun_path[0]) unlink(&name.sun_path[0]);    
+    WHY_perror("socket");
-    /* DONT include the null if forming an abstract socket, but DO include it
+    goto error;
-       if forming a file-system */
-    len = 1+strlen(&name.sun_path[1]) + sizeof(name.sun_family);
-    monitor_named_socket = socket(AF_UNIX, SOCK_STREAM, 0);
-    if (monitor_named_socket>-1) {
-      int dud=0;
-      int r=bind(monitor_named_socket, (struct sockaddr *)&name, len);
-      if (r) { dud=1; r=0; WHY_perror("bind"); }
-      r=listen(monitor_named_socket,MAX_MONITOR_SOCKETS);
-      if (r) { dud=1; r=0; WHY_perror("listen");
-      }
-      if (dud) {
-	close(monitor_named_socket);
-	monitor_named_socket=-1;
-	return -1;
-      }
-
-      int reuseP=1;
-      if(setsockopt( monitor_named_socket, SOL_SOCKET, SO_REUSEADDR, 
-		     &reuseP, sizeof(reuseP)) < 0)
-	{
-	  WHY("Could not indicate reuse addresses. Not necessarily a problem (yet)");
-	  WHY_perror("setsockopt");
-	}
-
-      int send_buffer_size=64*1024;    
-      int res = setsockopt(monitor_named_socket, SOL_SOCKET, SO_RCVBUF, 
-		       &send_buffer_size, sizeof(send_buffer_size));
-      if (res) WHY_perror("setsockopt");
-      else if (debug&(DEBUG_IO|DEBUG_VERBOSE_IO)) WHY("Monitor server socket setup");
-    }
   }
 
+#ifdef linux
+  /* Use abstract namespace as Android has no writable FS which supports sockets */
+  name.sun_path[0]=0;
+  /* XXX: 104 comes from OSX sys/un.h - no #define (note Linux has UNIX_PATH_MAX and it's 108(!)) */
+  snprintf(&name.sun_path[1],104-2,"org.servalproject.servald.monitor.socket");
+  /* Doesn't include trailing nul */
+  len = 1+strlen(&name.sun_path[1]) + sizeof(name.sun_family);
+#else
+  snprintf(name.sun_path,104-1,"%s/org.servalproject.servald.monitor.socket",serval_instancepath());
+  unlink(name.sun_path);
+  /* Includes trailing nul */
+  len = 1+strlen(&name.sun_path) + sizeof(name.sun_family);
+#endif
+
+  if(bind(monitor_named_socket, (struct sockaddr *)&name, len)==-1) {
+    WHY_perror("bind");
+    goto error;
+  }
+  if(listen(monitor_named_socket,MAX_MONITOR_SOCKETS)==-1) {
+    WHY_perror("listen");
+    goto error;
+  }
+
+  int reuseP=1;
+  if(setsockopt(monitor_named_socket, SOL_SOCKET, SO_REUSEADDR, 
+		&reuseP, sizeof(reuseP)) < 0) {
+    WHY_perror("setsockopt");
+    WHY("Could not indicate reuse addresses. Not necessarily a problem (yet)");
+  }
+  
+  int send_buffer_size=64*1024;    
+  if(setsockopt(monitor_named_socket, SOL_SOCKET, SO_RCVBUF, 
+		&send_buffer_size, sizeof(send_buffer_size))==-1)
+    WHY_perror("setsockopt");
+  if (debug&(DEBUG_IO|DEBUG_VERBOSE_IO)) WHY("Monitor server socket setup");
+
   return 0;
   
+  error:
+  close(monitor_named_socket);
+  monitor_named_socket=-1;
+  return -1;
 }
 
 int monitor_get_fds(struct pollfd *fds,int *fdcount,int fdmax)

overlay_interface.c

@@ -596,12 +596,13 @@ int overlay_interface_discover()
     r=r->next;
   }
 
-#ifdef ANDROID
+#ifdef SIOCGIFCONF
-  /* Use alternative linux-only method to find and register interfaces. */
   lsif();
 #endif
-  /* /proc based approach */
+
+#ifdef linux
   scrapeProcNetRoute();
+#endif
 
 #ifdef HAVE_IFADDRS_H
   struct ifaddrs *ifaddr,*ifa;

serval.h

@@ -1499,6 +1499,7 @@ int encodeAndDispatchRecordedAudio(int fd,int callSessionToken,
 				   unsigned char *sampleData,
 				   int sampleBytes);
 int scrapeProcNetRoute();
+int lsif();
 int bufferAudioForPlayback(int codec,long long start_time,long long end_time,
 			   unsigned char *data,int dataLen);
 int startAudio();