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author | Christopher Speller <crspeller@gmail.com> | 2016-10-03 16:03:15 -0400 |
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committer | GitHub <noreply@github.com> | 2016-10-03 16:03:15 -0400 |
commit | 8f91c777559748fa6e857d9fc1f4ae079a532813 (patch) | |
tree | 190f7cef373764a0d47a91045fdb486ee3d6781d /vendor/golang.org/x/net/icmp/ipv4.go | |
parent | 5f8e5c401bd96cba9a98b2db02d72f9cbacb0103 (diff) | |
download | chat-8f91c777559748fa6e857d9fc1f4ae079a532813.tar.gz chat-8f91c777559748fa6e857d9fc1f4ae079a532813.tar.bz2 chat-8f91c777559748fa6e857d9fc1f4ae079a532813.zip |
Adding ability to serve TLS directly from Mattermost server (#4119)
Diffstat (limited to 'vendor/golang.org/x/net/icmp/ipv4.go')
-rw-r--r-- | vendor/golang.org/x/net/icmp/ipv4.go | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/icmp/ipv4.go b/vendor/golang.org/x/net/icmp/ipv4.go new file mode 100644 index 000000000..729ddc97c --- /dev/null +++ b/vendor/golang.org/x/net/icmp/ipv4.go @@ -0,0 +1,56 @@ +// Copyright 2014 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. + +package icmp + +import ( + "encoding/binary" + "net" + "runtime" + + "golang.org/x/net/ipv4" +) + +// ParseIPv4Header parses b as an IPv4 header of ICMP error message +// invoking packet, which is contained in ICMP error message. +func ParseIPv4Header(b []byte) (*ipv4.Header, error) { + if len(b) < ipv4.HeaderLen { + return nil, errHeaderTooShort + } + hdrlen := int(b[0]&0x0f) << 2 + if hdrlen > len(b) { + return nil, errBufferTooShort + } + h := &ipv4.Header{ + Version: int(b[0] >> 4), + Len: hdrlen, + TOS: int(b[1]), + ID: int(binary.BigEndian.Uint16(b[4:6])), + FragOff: int(binary.BigEndian.Uint16(b[6:8])), + TTL: int(b[8]), + Protocol: int(b[9]), + Checksum: int(binary.BigEndian.Uint16(b[10:12])), + Src: net.IPv4(b[12], b[13], b[14], b[15]), + Dst: net.IPv4(b[16], b[17], b[18], b[19]), + } + switch runtime.GOOS { + case "darwin": + h.TotalLen = int(nativeEndian.Uint16(b[2:4])) + case "freebsd": + if freebsdVersion >= 1000000 { + h.TotalLen = int(binary.BigEndian.Uint16(b[2:4])) + } else { + h.TotalLen = int(nativeEndian.Uint16(b[2:4])) + } + default: + h.TotalLen = int(binary.BigEndian.Uint16(b[2:4])) + } + h.Flags = ipv4.HeaderFlags(h.FragOff&0xe000) >> 13 + h.FragOff = h.FragOff & 0x1fff + if hdrlen-ipv4.HeaderLen > 0 { + h.Options = make([]byte, hdrlen-ipv4.HeaderLen) + copy(h.Options, b[ipv4.HeaderLen:]) + } + return h, nil +} |