unbound/services/listen_dnsport.c

2  * services/listen_dnsport.c - listen on port 53 for incoming DNS queries.
86 /** lock on the counter of stream buffer memory */
88 /** lock on the counter of HTTP2 query buffer memory */
90 /** lock on the counter of HTTP2 response buffer memory */
205 	int on=1;
260 		if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on,
261 			(socklen_t)sizeof(on)) < 0) {
281 		/* on FreeBSD 12 we have SO_REUSEPORT_LB that does loadbalance
282 		 * like SO_REUSEPORT on Linux.  This is what the users want
288 		    setsockopt(s, SOL_SOCKET, SO_REUSEPORT_LB, (void*)&on,
289 			(socklen_t)sizeof(on)) < 0) {
303 		 * with SO_REUSEPORT set on each socket.
306 		    setsockopt(s, SOL_SOCKET, SO_REUSEPORT, (void*)&on,
307 			(socklen_t)sizeof(on)) < 0) {
322 		    setsockopt(s, IPPROTO_IP, IP_TRANSPARENT, (void*)&on,
323 		    (socklen_t)sizeof(on)) < 0) {
331 		    (void*)&on, (socklen_t)sizeof(on)) < 0) {
337 		    setsockopt(s, SOL_SOCKET, SO_BINDANY, (void*)&on,
338 		    (socklen_t)sizeof(on)) < 0) {
346 	    setsockopt(s, IPPROTO_IP, IP_FREEBIND, (void*)&on,
347 	    (socklen_t)sizeof(on)) < 0) {
358 		 * system limits on rcvbuf. The limit is stored in
403 		 * system limits on sndbuf. The limit is stored in
443 		log_warn("error setting IP DiffServ codepoint %d on UDP socket: %s", dscp, err);
469 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
536 		 * but does not work on that version, so we exclude it */
601 	int on = 1;
644 		if(setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void*)&on,
645 			(socklen_t)sizeof(on)) < 0) {
678 	if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on,
679 		(socklen_t)sizeof(on)) < 0) {
687 	if (freebind && setsockopt(s, IPPROTO_IP, IP_FREEBIND, (void*)&on,
688 	    (socklen_t)sizeof(on)) < 0) {
697 	 * with SO_REUSEPORT set on each socket.
700 		setsockopt(s, SOL_SOCKET, SO_REUSEPORT, (void*)&on,
701 		(socklen_t)sizeof(on)) < 0) {
716 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
728 	    setsockopt(s, IPPROTO_IP, IP_TRANSPARENT, (void*)&on,
729 	    (socklen_t)sizeof(on)) < 0) {
737 	    (void*)&on, (socklen_t)sizeof(on)) < 0) {
743 	    setsockopt(s, SOL_SOCKET, SO_BINDANY, (void*)&on, (socklen_t)
744 	    sizeof(on)) < 0) {
751 		log_warn("error setting IP DiffServ codepoint %d on TCP socket: %s", dscp, err);
792 	/* 5 is recommended on linux */
855 	/* this member exists on BSDs, not Linux */
859 	/* length is 92-108, 104 on FreeBSD */
928 			*noip6 = 1; /* 'Host not found' for IP6 on winXP */
1005  * @return false on failure. list in unchanged then.
1026 	int on = 1;
1033 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
1040 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
1054 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
1061 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
1124  * 	set to false on exit if reuseport failed due to no kernel support.
1128  * @param http2_nodelay: set TCP_NODELAY on HTTP/2 connection
1132  * @return: returns false on error.
1228  * @return: false on failure.
1584 	/* no name lookups on our listening ports */
1739 	 * called delete on us */
2161  * @return 0 on error, 1 otherwise
2182  * @return 0 on error, 1 otherwise
2324  * @return 0 on error, 1 otherwise
2361  * @return: -1 on error, 1 if answer is stored in c->buffer, 0 if there is no
2472 			 * sure no other action are taken anymore on comm point.
2529  * @return: 0 on error, 1 otherwise. query will be stored in h2_stream->qbuffer,
2626 		/* Case insensitive check on :method value to be on the safe
2648 		/* :path may contain DNS query, depending on method. Method might
2690 	/* Only interested in content-lentg for POST (on not yet known) method.
2765 			"buffer space for POST query. Can happen on multi "