Only print EDESTADDRREQ send error once

Author: DanielG

message.c

@@ -1156,13 +1156,20 @@ flushbuf(struct buffered *buf, struct interface *ifp)
                         (struct sockaddr*)&buf->sin6,
                         sizeof(buf->sin6));
         if(rc < 0) {
+		static int edestaddrreq_seen;
+		if (errno == EDESTADDRREQ) {
+			if (edestaddrreq_seen)
+				goto skip_send_error;
+			edestaddrreq_seen = 1;
+		}
 
 		char addr[INET6_ADDRSTRLEN+1];
 		uint32_t scope = buf->sin6.sin6_scope_id;
 		inet_ntop(AF_INET6, &buf->sin6.sin6_addr, addr, sizeof(addr));
 		fprintf(stderr, "send(%s%%%" PRIu32 "): %s\n",
 			addr, scope, strerror(errno));
 	}
+    skip_send_error:
     }
     VALGRIND_MAKE_MEM_UNDEFINED(buf->buf, buf->size);
     buf->len = 0;