commit a6f07ba49319bbb62772a99cc3267fe8409a39d4
Author: wouter <wouter@be551aaa-1e26-0410-a405-d3ace91eadb9>
Date:   Fri Apr 23 06:48:49 2010 +0000

           - Squelch log message: sendto failed permission denied for
             255.255.255.255, it is visible in VERB_DETAIL (verbosity 2).

diff --git a/util/net_help.c b/util/net_help.c
index 182f39d..7b2a3f4 100644
--- a/util/net_help.c
+++ b/util/net_help.c
@@ -494,6 +494,14 @@ addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen)
 	return (memcmp(s, map_prefix, 12) == 0);
 }
 
+int addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen)
+{
+	int af = (int)((struct sockaddr_in*)addr)->sin_family;
+	void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr;
+	return af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in)
+		&& memcmp(sinaddr, "\377\377\377\377", 4) == 0;
+}
+
 void sock_list_insert(struct sock_list** list, struct sockaddr_storage* addr,
 	socklen_t len, struct regional* region)
 {
diff --git a/util/net_help.h b/util/net_help.h
index 9ac96eb..8afa84b 100644
--- a/util/net_help.h
+++ b/util/net_help.h
@@ -280,6 +280,14 @@ void addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen,
 int addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen);
 
 /**
+ * See if sockaddr is 255.255.255.255.
+ * @param addr: address
+ * @param addrlen: length of address
+ * @return true if so
+ */
+int addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen);
+
+/**
  * Insert new socket list item. If fails logs error.
  * @param list: pointer to pointer to first item.
  * @param addr: address or NULL if 'cache'.
diff --git a/util/netevent.c b/util/netevent.c
index 4b6a0a3..3f3c6ce 100644
--- a/util/netevent.c
+++ b/util/netevent.c
@@ -301,6 +301,12 @@ comm_point_send_udp_msg(struct comm_point *c, ldns_buffer* packet,
 			(struct sockaddr_storage*)addr, addrlen) &&
 			verbosity < VERB_DETAIL)
 			return 0;
+		/* SO_BROADCAST sockopt can give access to 255.255.255.255,
+		 * but a dns cache does not need it. */
+		if(errno == EACCES && addr_is_broadcast(
+			(struct sockaddr_storage*)addr, addrlen) &&
+			verbosity < VERB_DETAIL)
+			return 0;
 #ifndef USE_WINSOCK
 		verbose(VERB_OPS, "sendto failed: %s", strerror(errno));
 #else