760 …Slocal int SetupSocket(struct sockaddr *intfAddr, mDNSIPPort port, int interfaceIndex, int *sktPtr)  in SetupSocket()  argument
770 	assert(sktPtr != NULL);  in SetupSocket()
771 	assert(*sktPtr == -1);  in SetupSocket()
774 	if      (intfAddr->sa_family == AF_INET ) *sktPtr = socket(PF_INET,  SOCK_DGRAM, IPPROTO_UDP);  in SetupSocket()
776 	else if (intfAddr->sa_family == AF_INET6) *sktPtr = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);  in SetupSocket()
780 	if (*sktPtr < 0) { err = errno; perror("socket"); }  in SetupSocket()
786 			err = setsockopt(*sktPtr, SOL_SOCKET, SO_REUSEPORT, &kOn, sizeof(kOn));  in SetupSocket()
788 			err = setsockopt(*sktPtr, SOL_SOCKET, SO_REUSEADDR, &kOn, sizeof(kOn));  in SetupSocket()
803 				err = setsockopt(*sktPtr, IPPROTO_IP, IP_PKTINFO, &kOn, sizeof(kOn));  in SetupSocket()
807 					err = setsockopt(*sktPtr, IPPROTO_IP, IP_RECVDSTADDR, &kOn, sizeof(kOn));  in SetupSocket()
813 						err = setsockopt(*sktPtr, IPPROTO_IP, IP_RECVIF, &kOn, sizeof(kOn));  in SetupSocket()
824 			setsockopt(*sktPtr, IPPROTO_IP, IP_RECVTTL, &kOn, sizeof(kOn));  in SetupSocket()
834 			err = setsockopt(*sktPtr, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr, sizeof(imr));  in SetupSocket()
841 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_IF, &((struct sockaddr_in*)intfAddr)->sin_addr,…  in SetupSocket()
848 			err = setsockopt(*sktPtr, IPPROTO_IP, IP_TTL, &kIntTwoFiveFive, sizeof(kIntTwoFiveFive));  in SetupSocket()
856 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_TTL, &kByteTwoFiveFive, sizeof(kByteTwoFiveFive…  in SetupSocket()
858 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_TTL, &kIntTwoFiveFive, sizeof(kIntTwoFiveFive));  in SetupSocket()
868 			err = bind(*sktPtr, (struct sockaddr *) &bindAddr, sizeof(bindAddr));  in SetupSocket()
881 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_RECVPKTINFO, &kOn, sizeof(kOn));  in SetupSocket()
888 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_PKTINFO, &kOn, sizeof(kOn));  in SetupSocket()
897 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &kOn, sizeof(kOn));  in SetupSocket()
904 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_HOPLIMIT, &kOn, sizeof(kOn));  in SetupSocket()
915 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_JOIN_GROUP, &imr6, sizeof(imr6));  in SetupSocket()
928 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_IF, &multicast_if, sizeof(multicast_if));  in SetupSocket()
936 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_V6ONLY, &kOn, sizeof(kOn));  in SetupSocket()
943 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &kIntTwoFiveFive, sizeof(kIntTwoFiveFiv…  in SetupSocket()
951 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &kByteTwoFiveFive, sizeof(kByteTwoFiv…  in SetupSocket()
953 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &kIntTwoFiveFive, sizeof(kIntTwoFiveF…  in SetupSocket()
969 			err = bind(*sktPtr, (struct sockaddr *) &bindAddr6, sizeof(bindAddr6));  in SetupSocket()
978 		err = fcntl(*sktPtr, F_GETFL, 0);  in SetupSocket()
982 			err = fcntl(*sktPtr, F_SETFL, err | O_NONBLOCK);  in SetupSocket()
988 	if (err != 0 && *sktPtr != -1) { assert(close(*sktPtr) == 0); *sktPtr = -1; }  in SetupSocket()
989 	assert( (err == 0) == (*sktPtr != -1) );  in SetupSocket()