From 1b27d0ce12c12a6ee4fd208789572442f2edd4fc Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 4 Feb 2005 02:05:27 +0000
Subject: r5212: added checking for receiving our own packets as broadcasts
 (This used to be commit 290dbd8cdcfa6a897647768dcbbd03f22fc7cf36)

---
 source4/nbt_server/interfaces.c |  6 ++++++
 source4/nbt_server/packet.c     | 29 +++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/source4/nbt_server/interfaces.c b/source4/nbt_server/interfaces.c
index 9c26925b32..bb599b4fcd 100644
--- a/source4/nbt_server/interfaces.c
+++ b/source4/nbt_server/interfaces.c
@@ -40,6 +40,12 @@ static void nbtd_request_handler(struct nbt_name_socket *nbtsock,
 		return;
 	}
 
+	/* see if its from one of our own interfaces - if so, then ignore it */
+	if (nbtd_self_packet(nbtsock, packet, src_address, src_port)) {
+		DEBUG(10,("Ignoring self packet from %s:%d\n", src_address, src_port));
+		return;
+	}
+
 	/* the request is to us in our role as a B node */
 	switch (packet->operation & NBT_OPCODE) {
 	case NBT_OPCODE_QUERY:
diff --git a/source4/nbt_server/packet.c b/source4/nbt_server/packet.c
index 337c77f33a..c5ed0b41ce 100644
--- a/source4/nbt_server/packet.c
+++ b/source4/nbt_server/packet.c
@@ -36,3 +36,32 @@ void nbtd_bad_packet(struct nbt_name_packet *packet,
 	}
 }
 
+
+/*
+  see if an incoming packet is from one of our own interfaces
+*/
+BOOL nbtd_self_packet(struct nbt_name_socket *nbtsock, 
+		      struct nbt_name_packet *packet, 
+		      const char *src_address, int src_port)
+{
+	struct nbt_interface *iface = talloc_get_type(nbtsock->incoming.private, 
+						      struct nbt_interface);
+	struct nbt_server *nbtsrv = iface->nbtsrv;
+	
+	if (src_port != lp_nbt_port()) {
+		return False;
+	}
+
+	for (iface=nbtsrv->interfaces;iface;iface=iface->next) {
+		if (strcmp(src_address, iface->ip_address) == 0) {
+			return True;
+		}
+	}
+
+	if (nbtsrv->bcast_interface &&
+	    strcmp(src_address, nbtsrv->bcast_interface->ip_address) == 0) {
+		return True;
+	}
+
+	return False;
+}
-- 
cgit