github.com/gidoBOSSftw5731/go/src@v0.0.0-20210226122457-d24b0edbf019/net/cgo_linux.go (about) 1 // Copyright 2011 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 //go:build !android && cgo && !netgo 6 // +build !android,cgo,!netgo 7 8 package net 9 10 /* 11 #include <netdb.h> 12 */ 13 import "C" 14 15 // NOTE(rsc): In theory there are approximately balanced 16 // arguments for and against including AI_ADDRCONFIG 17 // in the flags (it includes IPv4 results only on IPv4 systems, 18 // and similarly for IPv6), but in practice setting it causes 19 // getaddrinfo to return the wrong canonical name on Linux. 20 // So definitely leave it out. 21 const cgoAddrInfoFlags = C.AI_CANONNAME | C.AI_V4MAPPED | C.AI_ALL