625 …Slocal int SetupSocket(struct sockaddr *intfAddr, mDNSIPPort port, int interfaceIndex, int *sktPtr)  in SetupSocket()  argument
635 	assert(sktPtr != NULL);  in SetupSocket()
636 	assert(*sktPtr == -1);  in SetupSocket()
639 	if      (intfAddr->sa_family == AF_INET) *sktPtr = socket(PF_INET,  SOCK_DGRAM, IPPROTO_UDP);  in SetupSocket()
641 	else if (intfAddr->sa_family == AF_INET6) *sktPtr = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);  in SetupSocket()
645 …if (*sktPtr < 0) { err = errno; perror((intfAddr->sa_family == AF_INET) ? "socket AF_INET" : "sock…  in SetupSocket()
651 			err = setsockopt(*sktPtr, SOL_SOCKET, SO_REUSEPORT, &kOn, sizeof(kOn));  in SetupSocket()
653 			err = setsockopt(*sktPtr, SOL_SOCKET, SO_REUSEADDR, &kOn, sizeof(kOn));  in SetupSocket()
668 				err = setsockopt(*sktPtr, IPPROTO_IP, IP_PKTINFO, &kOn, sizeof(kOn));  in SetupSocket()
672 					err = setsockopt(*sktPtr, IPPROTO_IP, IP_RECVDSTADDR, &kOn, sizeof(kOn));  in SetupSocket()
678 						err = setsockopt(*sktPtr, IPPROTO_IP, IP_RECVIF, &kOn, sizeof(kOn));  in SetupSocket()
689 			setsockopt(*sktPtr, IPPROTO_IP, IP_RECVTTL, &kOn, sizeof(kOn));  in SetupSocket()
699 			err = setsockopt(*sktPtr, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr, sizeof(imr));  in SetupSocket()
706 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_IF, &((struct sockaddr_in*)intfAddr)->sin_addr,…  in SetupSocket()
713 			err = setsockopt(*sktPtr, IPPROTO_IP, IP_TTL, &kIntTwoFiveFive, sizeof(kIntTwoFiveFive));  in SetupSocket()
721 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_TTL, &kByteTwoFiveFive, sizeof(kByteTwoFiveFive…  in SetupSocket()
723 …err = setsockopt(*sktPtr, IPPROTO_IP, IP_MULTICAST_TTL, &kIntTwoFiveFive, sizeof(kIntTwoFiveFive));  in SetupSocket()
733 			err = bind(*sktPtr, (struct sockaddr *) &bindAddr, sizeof(bindAddr));  in SetupSocket()
746 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_2292_PKTINFO, &kOn, sizeof(kOn));  in SetupSocket()
755 				err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_2292_HOPLIMIT, &kOn, sizeof(kOn));  in SetupSocket()
766 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_JOIN_GROUP, &imr6, sizeof(imr6));  in SetupSocket()
779 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_IF, &multicast_if, sizeof(multicast_if));  in SetupSocket()
787 			err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_V6ONLY, &kOn, sizeof(kOn));  in SetupSocket()
794 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &kIntTwoFiveFive, sizeof(kIntTwoFiveFiv…  in SetupSocket()
802 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &kByteTwoFiveFive, sizeof(kByteTwoFiv…  in SetupSocket()
804 …err = setsockopt(*sktPtr, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &kIntTwoFiveFive, sizeof(kIntTwoFiveF…  in SetupSocket()
820 			err = bind(*sktPtr, (struct sockaddr *) &bindAddr6, sizeof(bindAddr6));  in SetupSocket()
829 		err = fcntl(*sktPtr, F_GETFL, 0);  in SetupSocket()
833 			err = fcntl(*sktPtr, F_SETFL, err | O_NONBLOCK);  in SetupSocket()
839 	if (err != 0 && *sktPtr != -1)  in SetupSocket()
841 		int sktClosed = close(*sktPtr);  in SetupSocket()
843 		*sktPtr = -1;  in SetupSocket()
845 	assert((err == 0) == (*sktPtr != -1));  in SetupSocket()