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net: clarify Listen on 0.0.0.0 behavior

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Fixes #17615

Change-Id: I7f88c0c6579c79007492e765d1b5ca4f28d19575
Reviewed-on: https://go-review.googlesource.com/45771
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Brad Fitzpatrick 2017-06-14 19:26:25 +00:00
parent 296b35382c
commit 071908f3d8
1 changed files with 18 additions and 6 deletions
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24
src/net/dial.go
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@ -542,12 +542,18 @@ func dialSingle(ctx context.Context, dp *dialParam, ra Addr) (c Conn, err error)
}
// Listen announces on the local network address laddr.
//
// The network net must be a stream-oriented network: "tcp", "tcp4",
// "tcp6", "unix" or "unixpacket".
// For TCP and UDP, the syntax of laddr is "host:port", like "127.0.0.1:8080".
//
// For TCP, the syntax of laddr is "host:port", like "127.0.0.1:8080".
// If host is omitted, as in ":8080", Listen listens on all available interfaces
// instead of just the interface with the given host address.
// See Dial for more details about address syntax.
// Listening on network "tcp" with host "0.0.0.0" or "[::]" may listen on both
// IPv4 and IPv6. To only use IPv4, use network "tcp4". To explicitly use both,
// listen on ":port" without a host.
//
// See Dial for more details about the address syntax.
//
// Listening on a hostname is not recommended because this creates a socket
// for at most one of its IP addresses.
@ -572,12 +578,18 @@ func Listen(net, laddr string) (Listener, error) {
}
// ListenPacket announces on the local network address laddr.
//
// The network net must be a packet-oriented network: "udp", "udp4",
// "udp6", "ip", "ip4", "ip6" or "unixgram".
// For TCP and UDP, the syntax of laddr is "host:port", like "127.0.0.1:8080".
// If host is omitted, as in ":8080", ListenPacket listens on all available interfaces
// instead of just the interface with the given host address.
// See Dial for the syntax of laddr.
//
// For UDP, the syntax of laddr is "host:port", like "127.0.0.1:8080".
// If host is omitted, as in ":8080", ListenPacket listens on all available
// interfaces instead of just the interface with the given host address.
// Listening on network "udp" with host "0.0.0.0" or "[::]" may listen on both
// IPv4 and IPv6. To only use IPv4, use network "udp4". To explicitly use both,
// listen on ":port" without a host.
//
// See Dial for more details about the address syntax.
//
// Listening on a hostname is not recommended because this creates a socket
// for at most one of its IP addresses.