diff options
author | Christopher Speller <crspeller@gmail.com> | 2017-06-21 19:06:17 -0700 |
---|---|---|
committer | Corey Hulen <corey@hulen.com> | 2017-06-21 19:06:17 -0700 |
commit | 42f28ab8e374137fe3f5d25424489d879d4724f8 (patch) | |
tree | 20353f2446b506d32e6d353b72a57bf48f070389 /vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go | |
parent | 6b39c308d882a0aeac533f8ab1d90b48a2ae4b5a (diff) | |
download | chat-42f28ab8e374137fe3f5d25424489d879d4724f8.tar.gz chat-42f28ab8e374137fe3f5d25424489d879d4724f8.tar.bz2 chat-42f28ab8e374137fe3f5d25424489d879d4724f8.zip |
Updating server dependancies (#6712)
Diffstat (limited to 'vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go')
-rw-r--r-- | vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go new file mode 100644 index 000000000..0a9c33a18 --- /dev/null +++ b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go @@ -0,0 +1,59 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.9 +// +build !nacl,!plan9,!windows + +package ipv4 + +import "net" + +func (c *payloadHandler) readFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) { + c.rawOpt.RLock() + oob := NewControlMessage(c.rawOpt.cflags) + c.rawOpt.RUnlock() + var nn int + switch c := c.PacketConn.(type) { + case *net.UDPConn: + if n, nn, _, src, err = c.ReadMsgUDP(b, oob); err != nil { + return 0, nil, nil, err + } + case *net.IPConn: + nb := make([]byte, maxHeaderLen+len(b)) + if n, nn, _, src, err = c.ReadMsgIP(nb, oob); err != nil { + return 0, nil, nil, err + } + hdrlen := int(nb[0]&0x0f) << 2 + copy(b, nb[hdrlen:]) + n -= hdrlen + default: + return 0, nil, nil, &net.OpError{Op: "read", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Err: errInvalidConnType} + } + if nn > 0 { + cm = new(ControlMessage) + if err = cm.Parse(oob[:nn]); err != nil { + return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err} + } + } + if cm != nil { + cm.Src = netAddrToIP4(src) + } + return +} + +func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) { + oob := cm.Marshal() + if dst == nil { + return 0, &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errMissingAddress} + } + switch c := c.PacketConn.(type) { + case *net.UDPConn: + n, _, err = c.WriteMsgUDP(b, oob, dst.(*net.UDPAddr)) + case *net.IPConn: + n, _, err = c.WriteMsgIP(b, oob, dst.(*net.IPAddr)) + default: + return 0, &net.OpError{Op: "write", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Err: errInvalidConnType} + } + return +} |