Fixed many compilation problems ("set, but not used" warnings) for

gcc 4.6 that may affect Ubuntu 11.10 users. [ISC-Bugs #27588]

RELNOTES

@@ -94,6 +94,9 @@ work on other platforms. Please report any problems and suggested fixes to
   checking programs to eliminate false positives.
   [ISC-Bugs 27539]
 
+- Fixed many compilation problems ("set, but not used" warnings) for
+  gcc 4.6 that may affect Ubuntu 11.10 users. [ISC-Bugs #27588]
+
 			Changes since 4.2.2
 
 - Fix the code that checks for an existing DDNS transaction to cancel

client/clparse.c

@@ -3,7 +3,7 @@
    Parser for dhclient config and lease files... */
 
 /*
- * Copyright (c) 2004-2011 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004-2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1996-2003 by Internet Software Consortium
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -59,10 +59,18 @@ isc_result_t read_client_conf ()
 {
 	struct client_config *config;
 	struct interface_info *ip;
-	struct parse *parse;
 	isc_result_t status;
 	unsigned code;
 
+        /* 
+         * TODO: LATER constant is very undescriptive. We should review it and
+         * change it to something more descriptive or even better remove it
+         * completely as it is currently not used.
+         */
+#ifdef LATER
+        struct parse *parse = NULL;
+#endif
+
 	/* Initialize the default request list. */
 	memset(default_requested_options, 0, sizeof(default_requested_options));
 
@@ -159,7 +167,6 @@ isc_result_t read_client_conf ()
 					(struct interface_info *)0,
 					&top_level_config);
 
-	parse = NULL;
 	if (status != ISC_R_SUCCESS) {
 		;
 #ifdef LATER

client/dhclient.c

@@ -1899,11 +1899,14 @@ void send_discover (cpp)
 	      ntohs (sockaddr_broadcast.sin_port), (long)(client -> interval));
 
 	/* Send out a packet. */
-	result = send_packet (client -> interface, (struct packet *)0,
-			      &client -> packet,
-			      client -> packet_length,
-			      inaddr_any, &sockaddr_broadcast,
-			      (struct hardware *)0);
+	result = send_packet(client->interface, NULL, &client->packet,
+			     client->packet_length, inaddr_any,
+                             &sockaddr_broadcast, NULL);
+        if (result < 0) {
+		log_error("%s:%d: Failed to send %d byte long packet over %s "
+			  "interface.", MDL, client->packet_length,
+			  client->interface->name);
+	}
 
 	/*
 	 * If we used 0 microseconds here, and there were other clients on the
@@ -2166,20 +2169,29 @@ void send_request (cpp)
 	      ntohs (destination.sin_port));
 
 	if (destination.sin_addr.s_addr != INADDR_BROADCAST &&
-	    fallback_interface)
-		result = send_packet (fallback_interface,
-				      (struct packet *)0,
-				      &client -> packet,
-				      client -> packet_length,
-				      from, &destination,
-				      (struct hardware *)0);
-	else
+	    fallback_interface) {
+		result = send_packet(fallback_interface, NULL, &client->packet,
+				     client->packet_length, from, &destination,
+				     NULL);
+		if (result < 0) {
+			log_error("%s:%d: Failed to send %d byte long packet "
+				  "over %s interface.", MDL,
+				  client->packet_length,
+				  fallback_interface->name);
+		}
+        }
+	else {
 		/* Send out a packet. */
-		result = send_packet (client -> interface, (struct packet *)0,
-				      &client -> packet,
-				      client -> packet_length,
-				      from, &destination,
-				      (struct hardware *)0);
+		result = send_packet(client->interface, NULL, &client->packet,
+				     client->packet_length, from, &destination,
+				     NULL);
+		if (result < 0) {
+			log_error("%s:%d: Failed to send %d byte long packet"
+				  " over %s interface.", MDL,
+				  client->packet_length,
+				  client->interface->name);
+		}
+        }
 
 	tv.tv_sec = cur_tv.tv_sec + client->interval;
 	tv.tv_usec = ((tv.tv_sec - cur_tv.tv_sec) > 1) ?
@@ -2195,16 +2207,19 @@ void send_decline (cpp)
 	int result;
 
 	log_info ("DHCPDECLINE on %s to %s port %d",
-	      client -> name ? client -> name : client -> interface -> name,
-	      inet_ntoa (sockaddr_broadcast.sin_addr),
-	      ntohs (sockaddr_broadcast.sin_port));
+	      client->name ? client->name : client->interface->name,
+	      inet_ntoa(sockaddr_broadcast.sin_addr),
+	      ntohs(sockaddr_broadcast.sin_port));
 
 	/* Send out a packet. */
-	result = send_packet (client -> interface, (struct packet *)0,
-			      &client -> packet,
-			      client -> packet_length,
-			      inaddr_any, &sockaddr_broadcast,
-			      (struct hardware *)0);
+	result = send_packet(client->interface, NULL, &client->packet,
+			     client->packet_length, inaddr_any,
+			     &sockaddr_broadcast, NULL);
+	if (result < 0) {
+		log_error("%s:%d: Failed to send %d byte long packet over %s"
+			  " interface.", MDL, client->packet_length,
+			  client->interface->name);
+	}
 }
 
 void send_release (cpp)
@@ -2242,20 +2257,29 @@ void send_release (cpp)
 	      inet_ntoa (destination.sin_addr),
 	      ntohs (destination.sin_port));
 
-	if (fallback_interface)
-		result = send_packet (fallback_interface,
-				      (struct packet *)0,
-				      &client -> packet,
-				      client -> packet_length,
-				      from, &destination,
-				      (struct hardware *)0);
-	else
+	if (fallback_interface) {
+		result = send_packet(fallback_interface, NULL, &client->packet,
+				      client->packet_length, from, &destination,
+				      NULL);
+		if (result < 0) {
+			log_error("%s:%d: Failed to send %d byte long packet"
+				  " over %s interface.", MDL,
+				  client->packet_length,
+				  fallback_interface->name);
+		}
+        } else {
 		/* Send out a packet. */
-		result = send_packet (client -> interface, (struct packet *)0,
-				      &client -> packet,
-				      client -> packet_length,
-				      from, &destination,
-				      (struct hardware *)0);
+		result = send_packet(client->interface, NULL, &client->packet,
+				      client->packet_length, from, &destination,
+				      NULL);
+		if (result < 0) {
+			log_error ("%s:%d: Failed to send %d byte long packet"
+				   " over %s interface.", MDL,
+				   client->packet_length,
+				   client->interface->name);
+		}
+
+        }
 }
 
 void
@@ -3219,7 +3243,6 @@ void script_write_params (client, prefix, lease)
 				  lease->server_name);
 		}
 	}
-				
 
 	for (i = 0; i < lease -> options -> universe_count; i++) {
 		option_space_foreach ((struct packet *)0, (struct lease *)0,

common/comapi.c

@@ -3,6 +3,7 @@
    OMAPI object interfaces for the DHCP server. */
 
 /*
+ * Copyright (c) 2012 Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 2004-2007,2009 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1999-2003 by Internet Software Consortium
  *
@@ -435,7 +436,7 @@ isc_result_t dhcp_group_remove (omapi_object_t *lp,
 
 	status = dhcp_group_destroy ((omapi_object_t *)group, MDL);
 
-	return ISC_R_SUCCESS;
+	return status;
 }
 
 isc_result_t dhcp_control_set_value  (omapi_object_t *h,
@@ -511,12 +512,12 @@ isc_result_t dhcp_control_destroy (omapi_object_t *h,
 isc_result_t dhcp_control_signal_handler (omapi_object_t *h,
 					const char *name, va_list ap)
 {
-	dhcp_control_object_t *control;
+	/* In this function h should be a (dhcp_control_object_t *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_control)
 		return DHCP_R_INVALIDARG;
-	control = (dhcp_control_object_t *)h;
 
 	/* Try to find some inner object that can take the value. */
 	if (h -> inner && h -> inner -> type -> get_value) {
@@ -572,11 +573,11 @@ isc_result_t dhcp_control_lookup (omapi_object_t **lp,
 		status = omapi_get_value_str (ref, id, "handle", &tv);
 		if (status == ISC_R_SUCCESS) {
 			status = omapi_handle_td_lookup (lp, tv -> value);
-			
+
 			omapi_value_dereference (&tv, MDL);
 			if (status != ISC_R_SUCCESS)
 				return status;
-			
+
 			/* Don't return the object if the type is wrong. */
 			if ((*lp) -> type != dhcp_type_control) {
 				omapi_object_dereference (lp, MDL);
@@ -612,12 +613,12 @@ isc_result_t dhcp_subnet_set_value  (omapi_object_t *h,
 				     omapi_data_string_t *name,
 				     omapi_typed_data_t *value)
 {
-	struct subnet *subnet;
+	/* In this function h should be a (struct subnet *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_subnet)
 		return DHCP_R_INVALIDARG;
-	subnet = (struct subnet *)h;
 
 	/* No values to set yet. */
 
@@ -628,7 +629,7 @@ isc_result_t dhcp_subnet_set_value  (omapi_object_t *h,
 		if (status == ISC_R_SUCCESS || status == DHCP_R_UNCHANGED)
 			return status;
 	}
-			  
+
 	return ISC_R_NOTFOUND;
 }
 
@@ -637,12 +638,12 @@ isc_result_t dhcp_subnet_get_value (omapi_object_t *h, omapi_object_t *id,
 				    omapi_data_string_t *name,
 				    omapi_value_t **value)
 {
-	struct subnet *subnet;
+	/* In this function h should be a (struct subnet *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_subnet)
 		return DHCP_R_INVALIDARG;
-	subnet = (struct subnet *)h;
 
 	/* No values to get yet. */
 
@@ -658,14 +659,17 @@ isc_result_t dhcp_subnet_get_value (omapi_object_t *h, omapi_object_t *id,
 
 isc_result_t dhcp_subnet_destroy (omapi_object_t *h, const char *file, int line)
 {
+#if defined (DEBUG_MEMORY_LEAKAGE) || \
+		defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
 	struct subnet *subnet;
+#endif
 
 	if (h -> type != dhcp_type_subnet)
 		return DHCP_R_INVALIDARG;
-	subnet = (struct subnet *)h;
 
 #if defined (DEBUG_MEMORY_LEAKAGE) || \
 		defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
+	subnet = (struct subnet *)h;
 	if (subnet -> next_subnet)
 		subnet_dereference (&subnet -> next_subnet, file, line);
 	if (subnet -> next_sibling)
@@ -685,13 +689,13 @@ isc_result_t dhcp_subnet_destroy (omapi_object_t *h, const char *file, int line)
 isc_result_t dhcp_subnet_signal_handler (omapi_object_t *h,
 					 const char *name, va_list ap)
 {
-	struct subnet *subnet;
+	/* In this function h should be a (struct subnet *) */
+
 	isc_result_t status;
 	int updatep = 0;
 
 	if (h -> type != dhcp_type_subnet)
 		return DHCP_R_INVALIDARG;
-	subnet = (struct subnet *)h;
 
 	/* Can't write subnets yet. */
 
@@ -711,12 +715,12 @@ isc_result_t dhcp_subnet_stuff_values (omapi_object_t *c,
 				       omapi_object_t *id,
 				       omapi_object_t *h)
 {
-	struct subnet *subnet;
+	/* In this function h should be a (struct subnet *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_subnet)
 		return DHCP_R_INVALIDARG;
-	subnet = (struct subnet *)h;
 
 	/* Can't stuff subnet values yet. */
 
@@ -761,12 +765,12 @@ isc_result_t dhcp_shared_network_set_value  (omapi_object_t *h,
 					     omapi_data_string_t *name,
 					     omapi_typed_data_t *value)
 {
-	struct shared_network *shared_network;
+	/* In this function h should be a (struct shared_network *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_shared_network)
 		return DHCP_R_INVALIDARG;
-	shared_network = (struct shared_network *)h;
 
 	/* No values to set yet. */
 
@@ -777,7 +781,7 @@ isc_result_t dhcp_shared_network_set_value  (omapi_object_t *h,
 		if (status == ISC_R_SUCCESS || status == DHCP_R_UNCHANGED)
 			return status;
 	}
-			  
+
 	return ISC_R_NOTFOUND;
 }
 
@@ -787,12 +791,12 @@ isc_result_t dhcp_shared_network_get_value (omapi_object_t *h,
 					    omapi_data_string_t *name,
 					    omapi_value_t **value)
 {
-	struct shared_network *shared_network;
+	/* In this function h should be a (struct shared_network *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_shared_network)
 		return DHCP_R_INVALIDARG;
-	shared_network = (struct shared_network *)h;
 
 	/* No values to get yet. */
 
@@ -809,14 +813,19 @@ isc_result_t dhcp_shared_network_get_value (omapi_object_t *h,
 isc_result_t dhcp_shared_network_destroy (omapi_object_t *h,
 					  const char *file, int line)
 {
+	/* In this function h should be a (struct shared_network *) */
+
+#if defined (DEBUG_MEMORY_LEAKAGE) || \
+    defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
 	struct shared_network *shared_network;
+#endif
 
 	if (h -> type != dhcp_type_shared_network)
 		return DHCP_R_INVALIDARG;
-	shared_network = (struct shared_network *)h;
 
 #if defined (DEBUG_MEMORY_LEAKAGE) || \
 		defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
+	shared_network = (struct shared_network *)h;
 	if (shared_network -> next)
 		shared_network_dereference (&shared_network -> next,
 					    file, line);
@@ -849,13 +858,13 @@ isc_result_t dhcp_shared_network_signal_handler (omapi_object_t *h,
 						 const char *name,
 						 va_list ap)
 {
-	struct shared_network *shared_network;
+	/* In this function h should be a (struct shared_network *) */
+
 	isc_result_t status;
 	int updatep = 0;
 
 	if (h -> type != dhcp_type_shared_network)
 		return DHCP_R_INVALIDARG;
-	shared_network = (struct shared_network *)h;
 
 	/* Can't write shared_networks yet. */
 
@@ -875,12 +884,12 @@ isc_result_t dhcp_shared_network_stuff_values (omapi_object_t *c,
 					       omapi_object_t *id,
 					       omapi_object_t *h)
 {
-	struct shared_network *shared_network;
+	/* In this function h should be a (struct shared_network *) */
+
 	isc_result_t status;
 
 	if (h -> type != dhcp_type_shared_network)
 		return DHCP_R_INVALIDARG;
-	shared_network = (struct shared_network *)h;
 
 	/* Can't stuff shared_network values yet. */
 

common/options.c

@@ -3,7 +3,7 @@
    DHCP options parsing and reassembly. */
 
 /*
- * Copyright (c) 2004-2011 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004-2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1995-2003 by Internet Software Consortium
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -2361,7 +2361,7 @@ prepare_option_buffer(struct universe *universe, struct buffer *bp,
       cleanup:
 	option_dereference(&option, MDL);
 
-	return 1;
+	return status;
 }
 
 static void

common/parse.c

@@ -907,7 +907,7 @@ parse_date_core(cfile)
 	struct parse *cfile;
 {
 	int guess;
-	int tzoff, wday, year, mon, mday, hour, min, sec;
+	int tzoff, year, mon, mday, hour, min, sec;
 	const char *val;
 	enum dhcp_token token;
 	static int months[11] = { 31, 59, 90, 120, 151, 181,
@@ -945,7 +945,7 @@ parse_date_core(cfile)
 		return((TIME)0);
 	}
 	token = next_token(&val, NULL, cfile); /* consume day of week */
-	wday = atoi(val);
+        /* we are not using this for anything */
 
 	/* Year... */
 	token = peek_token(&val, NULL, cfile);
@@ -3390,11 +3390,10 @@ int parse_boolean_expression (expr, cfile, lose)
 int parse_boolean (cfile)
 	struct parse *cfile;
 {
-	enum dhcp_token token;
 	const char *val;
 	int rv;
 
-	token = next_token (&val, (unsigned *)0, cfile);
+        (void)next_token(&val, NULL, cfile);
 	if (!strcasecmp (val, "true")
 	    || !strcasecmp (val, "on"))
 		rv = 1;

common/print.c

@@ -3,7 +3,7 @@
    Turn data structures into printable text. */
 
 /*
- * Copyright (c) 2009-2011 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2009-2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 2004-2007 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1995-2003 by Internet Software Consortium
  *
@@ -479,10 +479,9 @@ char *print_dotted_quads (len, data)
 {
 	static char dq_buf [DQLEN + 1];
 	int i;
-	char *s, *last;
+	char *s;
 
 	s = &dq_buf [0];
-	last = s;
 	
 	i = 0;
 

common/socket.c

@@ -1000,6 +1000,9 @@ isc_result_t fallback_discard (object)
 		log_error ("fallback_discard: %m");
 		return ISC_R_UNEXPECTED;
 	}
+#else
+        /* ignore the fact that status value is never used */
+        IGNORE_UNUSED(status);
 #endif
 	return ISC_R_SUCCESS;
 }

dst/prandom.c

 #ifndef LINT
-static const char rcsid[] = "$Header: /tmp/cvstest/DHCP/dst/prandom.c,v 1.9 2009/11/24 02:06:56 sar Exp $";
+static const char rcsid[] = "$Header: /tmp/cvstest/DHCP/dst/prandom.c,v 1.10 2012/03/09 11:18:13 tomasz Exp $";
 #endif
 /*
- * Portions Copyright (c) 1995-1998 by Trusted Information Systems, Inc.
+ * Portions Copyright (c) 2012 by Internet Systems Consortium, Inc. ("ISC")
  * Portions Copyright (c) 2007,2009 by Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (c) 1995-1998 by Trusted Information Systems, Inc.
  *
  * Permission to use, copy modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -694,7 +695,6 @@ own_random(dst_work *work)
 {
 	int dir = 0, b;
 	int bytes, n, cmd = 0, dig = 0;
-	int start =0;
 /* 
  * now get the initial seed to put into the quick random function from 
  * the address of the work structure 
@@ -709,7 +709,6 @@ own_random(dst_work *work)
 /* pick a random number in the range of 0..7 based on that random number
  * perform some operations that yield random data
  */
-		start = work->filled;
 		n = (dst_s_quick_random(bytes) >> DST_SHIFT) & 0x07;
 		switch (n) {
 		    case 0:

includes/cdefs.h

@@ -4,7 +4,7 @@
 
 /*
  * Copyright (c) 1995 RadioMail Corporation.  All rights reserved.
- * Copyright (c) 2011 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2011,2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 2004,2009 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1996-2003 by Internet Software Consortium
  *
@@ -46,15 +46,25 @@
  * the warning by the use of void.  In conjunction with the use of -Werror
  * these warnings prohibit the compilation of the package.  This macro
  * allows us to assign the return value to a variable and then ignore it.
+ *
+ * __attribute__((unused)) is added for avoiding another warning about set,
+ * but unused variable. This is produced by unused-but-set-variable switch
+ * that is enabled by default in gcc 4.6.
  */
 #if !defined(__GNUC__) || (__GNUC__ < 4)
 #define IGNORE_RET(x) (void) x
 #else
 #define IGNORE_RET(x)			\
 	do {				\
-		int ignore_return;	\
-		ignore_return = x;	\
+                int __attribute__((unused)) ignore_return ;\
+                ignore_return = x;                         \
 	} while (0)
 #endif
 
+/* This macro is defined to avoid unused-but-set-variable warning
+ * that is enabled in gcc 4.6 
+ */
+
+#define IGNORE_UNUSED(x) { x = x; }
+
 #endif /* __ISC_DHCP_CDEFS_H__ */

omapip/handle.c

@@ -3,7 +3,7 @@
    Functions for maintaining handles on objects. */
 
 /*
- * Copyright (c) 2009-2010 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2009-2010,2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 2004-2007 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1999-2003 by Internet Software Consortium
  *
@@ -252,7 +252,6 @@ static isc_result_t omapi_handle_lookup_in (omapi_object_t **o,
 					    omapi_handle_table_t *table,
 					    int op)
 {
-	omapi_handle_table_t *inner;
 	omapi_handle_t scale, index;
 
 	if (!table || table->first > h || table->limit <= h)
@@ -282,7 +281,6 @@ static isc_result_t omapi_handle_lookup_in (omapi_object_t **o,
 	   handle must be the subtable of this table whose index into this
 	   table's array of children is the handle divided by the scale. */
 	index = (h - table->first) / scale;
-	inner = table->children[index].table;
 
 	return(omapi_handle_lookup_in(o, h, table->children[index].table, op));
 }

omapip/listener.c

@@ -3,6 +3,7 @@
    Subroutines that support the generic listener object. */
 
 /*
+ * Copyright (c) 2012 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 2004,2007,2009 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1999-2003 by Internet Software Consortium
  *
@@ -124,7 +125,7 @@ isc_result_t omapi_listen_addr (omapi_object_t *h,
 				status = ISC_R_UNEXPECTED;
 			goto error_exit;
 		}
-	
+
 #if defined (HAVE_SETFD)
 		if (fcntl (obj -> socket, F_SETFD, 1) < 0) {
 			status = ISC_R_UNEXPECTED;
@@ -140,7 +141,7 @@ isc_result_t omapi_listen_addr (omapi_object_t *h,
 			status = ISC_R_UNEXPECTED;
 			goto error_exit;
 		}
-		
+
 		/* Try to bind to the wildcard address using the port number
 		   we were given. */
 		i = bind (obj -> socket,
@@ -369,6 +370,10 @@ static void trace_listener_accept_input (trace_type_t *ttype,
 			obj = (omapi_connection_object_t *)0;
 			status = omapi_listener_connect (&obj,
 							 lp, 0, &remote_addr);
+			if (status != ISC_R_SUCCESS) {
+				log_error("%s:%d: OMAPI: Failed to connect "
+					  "a listener.", MDL);
+			}
 			omapi_listener_dereference (&lp, MDL);
 			return;
 		}

server/bootp.c

@@ -3,7 +3,8 @@
    BOOTP Protocol support. */
 
 /*
- * Copyright (c) 2004,2005,2007,2009 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2009,2012 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004,2005,2007 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1995-2003 by Internet Software Consortium
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -384,10 +385,16 @@ void bootp (packet)
 		to.sin_port = local_port;
 
 		if (fallback_interface) {
-			result = send_packet (fallback_interface,
-					      (struct packet *)0,
-					      &raw, outgoing.packet_length,
-					      from, &to, &hto);
+			result = send_packet (fallback_interface, NULL, &raw,
+					      outgoing.packet_length, from,
+					      &to, &hto);
+			if (result < 0) {
+				log_error ("%s:%d: Failed to send %d byte long "
+					   "packet over %s interface.", MDL,