From: patthoyts <patthoyts>
Date: Fri, 30 Mar 2007 11:09:44 +0000 (+0000)
Subject: Added support for IP_MULTICAST_LOOP for kostix.
X-Git-Url: http://privyetmir.co.uk/gitweb?a=commitdiff_plain;h=cb7b90e2444eb00657224817812e3634751445b1;p=tcludp

Added support for IP_MULTICAST_LOOP for kostix.
---

diff --git a/ChangeLog b/ChangeLog
index b9a0d91..e950ae2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-30  Pat Thoyts  <patthoyts@users.sourceforge.net>
+
+	* generic/udp_tcl.c: Added support for IP_MULTICAST_LOOP for
+	Konstantin Khomoutov to control multicast loopback transmission.
+
 2007-01-31  Pat Thoyts  <patthoyts@users.sourceforge.net>
 
 	* generic/udp_tcl.c: Turns out the HP-UX patch break buiding on
diff --git a/generic/udp_tcl.c b/generic/udp_tcl.c
index 05a84a0..51fac95 100644
--- a/generic/udp_tcl.c
+++ b/generic/udp_tcl.c
@@ -1233,7 +1233,7 @@ udpGetOption(ClientData instanceData, Tcl_Interp *interp,
              CONST84 char *optionName, Tcl_DString *optionValue)
 {
     UdpState *statePtr = (UdpState *)instanceData;
-    CONST84 char * options[] = { "myport", "remote", "peer", "mcastgroups", "broadcast", "ttl", NULL};
+    CONST84 char * options[] = { "myport", "remote", "peer", "mcastgroups", "mcastloopback", "broadcast", "ttl", NULL};
     int r = TCL_OK;
 
     if (optionName == NULL) {
@@ -1301,6 +1301,20 @@ udpGetOption(ClientData instanceData, Tcl_Interp *interp,
                 sprintf(Tcl_DStringValue(&ds), "%d", tmp);
             }
 
+	} else if (!strcmp("-mcastloopback", optionName)) {
+
+            unsigned char tmp = 0;
+            socklen_t optlen = sizeof(unsigned char);
+            if (getsockopt(statePtr->sock, IPPROTO_IP, IP_MULTICAST_LOOP, 
+                           (char *)&tmp, &optlen)) {
+                UDPTRACE("UDP error - getsockopt\n");
+                Tcl_SetResult(interp, "error in getsockopt", TCL_STATIC);
+                r = TCL_ERROR;
+            } else {
+                Tcl_DStringSetLength(&ds, TCL_INTEGER_SPACE);
+                sprintf(Tcl_DStringValue(&ds), "%d", (int)tmp);
+            }
+
         } else if (!strcmp("-ttl", optionName)) {
           
             unsigned int tmp = 0;
@@ -1351,7 +1365,7 @@ udpSetOption(ClientData instanceData, Tcl_Interp *interp,
              CONST84 char *optionName, CONST84 char *newValue)
 {
     UdpState *statePtr = (UdpState *)instanceData;
-    CONST84 char * options = "remote mcastadd mcastdrop broadcast ttl";
+    CONST84 char * options = "remote mcastadd mcastdrop mcastloopback broadcast ttl";
     int r = TCL_OK;
 
     if (!strcmp("-remote", optionName)) {
@@ -1404,6 +1418,23 @@ udpSetOption(ClientData instanceData, Tcl_Interp *interp,
                 Tcl_SetObjResult(interp, Tcl_NewIntObj(tmp));
             }
         }
+    } else if (!strcmp("-mcastloopback", optionName)) {
+
+        int tmp = 1;
+        r = Tcl_GetInt(interp, newValue, &tmp);
+        if (r == TCL_OK) {
+	    unsigned char ctmp = (unsigned char)tmp;
+            if (setsockopt(statePtr->sock, IPPROTO_IP, IP_MULTICAST_LOOP,
+                           (const char *)&ctmp, sizeof(unsigned char))) {
+                sprintf(errBuf, "%s", "udp - setsockopt");
+                UDPTRACE("UDP error - setsockopt\n");
+                Tcl_SetObjResult(interp, Tcl_NewStringObj(errBuf, -1));
+                r = TCL_ERROR;
+            } else {
+                Tcl_SetObjResult(interp, Tcl_NewIntObj(tmp));
+            }
+        }
+
     } else if (!strcmp("-ttl", optionName)) {
 
         unsigned int tmp = 0;