diff -ur mim-1.4/xmim/sdp_listener.c mim-1.4.new/xmim/sdp_listener.c
--- mim-1.4/xmim/sdp_listener.c	Sat Aug 24 00:07:19 2002
+++ mim-1.4.new/xmim/sdp_listener.c	Fri Feb 21 16:28:01 2003
@@ -37,14 +37,28 @@
 /* auxilliary functions */
 int parse_sap_packet(char *data, char **key, char **name);
 
-void *sdp_listener(void *){
+void *sdp_listener4(void *){
+   sdp_listener(4);
+   return NULL;
+}
+void *sdp_listener6(void *){
+   sdp_listener(6);
+   return NULL;
+}
+
+void *sdp_listener(int ipv){
   
   typedef struct {
     uint32_t sapHdr;
     uint32_t sapSrc;
     char sapData[1];
-  }sapPacket_t;
-  
+  }sapPacket4_t;
+
+  typedef struct {
+    uint32_t sapHdr;
+    unsigned char sapSrc[16];
+    char sapData[1];
+  }sapPacket6_t;
 
   extern GtkWidget *mpegVideoCLIST;
   extern GtkWidget *otherVideoCLIST;
@@ -53,25 +67,33 @@
   
   int returnVal;
   int sock, addressSize;
-  sapPacket_t *s=NULL;
-  struct sockaddr_in sourceAddress;
+  sapPacket4_t *s4=NULL;
+  sapPacket6_t *s6=NULL;
+  struct sockaddr_storage sourceAddress;
   
   char *data=(char *)malloc(BUFFERSIZE);
   char *duplicate=NULL;
+  char *sap_addr;
 
   char *items[]={"NULL"};
-	aMediaSource_t mediaSource;
+  aMediaSource_t mediaSource;
+
+  if (ipv == 4)
+    sap_addr = SAP_ADDR;
+  else
+    sap_addr = SAPV6_ADDR;
   
-	mediaSource.mreq = Mreq::getMClass(SAP_ADDR, 0);
-	mediaSource.mreq->setGroup(SAP_ADDR, NULL, 0, 0);
+  mediaSource.mreq = Mreq::getMClass(sap_addr, 0);
+  mediaSource.mreq->setGroup(sap_addr, NULL, 0, 0);
 
   if( (sock=start_msock(&mediaSource,SAP_PORT,1,127,0)) <0 ){
-    perror("start_msock(SAP_ADDR)");
-    fprintf(stderr,"Could not start sdp listener.\n");
-    exit(-1);
+    perror("start_msock(sap_addr)");
+    fprintf(stderr,"Could not start sdp%u listener: %s.\n", ipv, sap_addr);
+    //exit(-1);
+    return NULL;  // note: a problem if neither v4 or v6 SAP succeeds.
   }
-  fprintf(stderr,"sdp Listener started\n");
-  addressSize=sizeof(struct sockaddr_in);
+  fprintf(stderr,"sdp%u Listener started\n", ipv);
+  addressSize=sizeof(struct sockaddr_storage);
   
   while(1){    
 	 node *thisNode=NULL;
@@ -84,9 +106,17 @@
       perror("recvfrom()");
       break;
     }
-    s=(sapPacket_t *)data;
-	 duplicate=(char *)malloc(returnVal);
-    strcpy(duplicate,s->sapData);
+
+    duplicate=(char *)malloc(returnVal);
+
+    if (ipv == 4) {
+      s4=(sapPacket4_t *)data;
+      strcpy(duplicate,s4->sapData);
+    }
+    else {
+      s6=(sapPacket6_t *)data;
+      strcpy(duplicate,s6->sapData);
+    }
 	 
 	 /* parse the packet for key and name */
 	 key=(char *)strtok(duplicate,"\n");
@@ -95,8 +125,11 @@
 	 name=(char *)strtok(name,"=");
 	 name=(char *)strtok(NULL,"=");
 	 
-	 if(key!=NULL && name!=NULL && s->sapData!=NULL){
-		thisNode=new_node(key,name,s->sapData);
+	 if(key!=NULL && name!=NULL && (s4->sapData!=NULL || s6->sapData!=NULL)){
+		if (ipv == 4)
+ 			thisNode=new_node(key,name,s4->sapData);
+		else
+			thisNode=new_node(key,name,s6->sapData);
 		gdk_threads_enter();
 		if( (char *)strstr(thisNode->data, "RTP/AVP 32")!=NULL ){
 		  if( find_node(mpegListHead, thisNode->key)==NULL ){
diff -ur mim-1.4/xmim/sdp_listener.h mim-1.4.new/xmim/sdp_listener.h
--- mim-1.4/xmim/sdp_listener.h	Wed Aug 21 19:47:12 2002
+++ mim-1.4.new/xmim/sdp_listener.h	Fri Feb 21 16:11:26 2003
@@ -23,10 +23,17 @@
 #define SDP_LISTENER_H
 
 #define SAP_ADDR "224.2.127.254"
+#define SAPV6_ADDR "ff0e:0:0:0:0:0:2:7ffe"
 #define SAP_PORT 9875
 
 void *
-sdp_listener(void *);
+sdp_listener(int);
+
+void *
+sdp_listener4(void *);
+
+void *
+sdp_listener6(void *);
 
 
 
diff -ur mim-1.4/xmim/xmim.c mim-1.4.new/xmim/xmim.c
--- mim-1.4/xmim/xmim.c	Wed Sep  4 19:27:23 2002
+++ mim-1.4.new/xmim/xmim.c	Fri Feb 21 16:28:54 2003
@@ -54,7 +54,8 @@
   GtkWidget *mpegSCROLLEDWINDOW,*otherSCROLLEDWINDOW;
   GtkWidget *mpegVideoVBOX, *otherVideoVBOX;
   
-  pthread_t sdpListenerThread;  
+  pthread_t sdpListener4Thread;  
+  pthread_t sdpListener6Thread;  
   
   char *column_titles[]={"Session Names"};
   
@@ -216,7 +217,8 @@
   read_cache();
   gtk_widget_show(mainWINDOW);
   
-  pthread_create(&sdpListenerThread,NULL,sdp_listener,NULL);
+  pthread_create(&sdpListener4Thread,NULL,sdp_listener4,NULL);
+  pthread_create(&sdpListener6Thread,NULL,sdp_listener6,NULL);
   
   gdk_threads_enter();
   gtk_main();