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matterbridge/vendor/golang.org/x/sys/unix/sockcmsg_linux.go
dependabot[bot] aad60c882e
Bump github.com/mattermost/mattermost-server/v6 from 6.1.0 to 6.3.0 (#1686)
Bumps [github.com/mattermost/mattermost-server/v6](https://github.com/mattermost/mattermost-server) from 6.1.0 to 6.3.0.
- [Release notes](https://github.com/mattermost/mattermost-server/releases)
- [Changelog](https://github.com/mattermost/mattermost-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mattermost/mattermost-server/compare/v6.1.0...v6.3.0)

---
updated-dependencies:
- dependency-name: github.com/mattermost/mattermost-server/v6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2022-01-18 20:24:14 +01:00

86 lines
2.6 KiB
Go

// Copyright 2011 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.
// Socket control messages
package unix
import "unsafe"
// UnixCredentials encodes credentials into a socket control message
// for sending to another process. This can be used for
// authentication.
func UnixCredentials(ucred *Ucred) []byte {
b := make([]byte, CmsgSpace(SizeofUcred))
h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
h.Level = SOL_SOCKET
h.Type = SCM_CREDENTIALS
h.SetLen(CmsgLen(SizeofUcred))
*(*Ucred)(h.data(0)) = *ucred
return b
}
// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the
// SO_PASSCRED option must be enabled on the socket.
func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
if m.Header.Level != SOL_SOCKET {
return nil, EINVAL
}
if m.Header.Type != SCM_CREDENTIALS {
return nil, EINVAL
}
ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
return &ucred, nil
}
// PktInfo4 encodes Inet4Pktinfo into a socket control message of type IP_PKTINFO.
func PktInfo4(info *Inet4Pktinfo) []byte {
b := make([]byte, CmsgSpace(SizeofInet4Pktinfo))
h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
h.Level = SOL_IP
h.Type = IP_PKTINFO
h.SetLen(CmsgLen(SizeofInet4Pktinfo))
*(*Inet4Pktinfo)(h.data(0)) = *info
return b
}
// PktInfo6 encodes Inet6Pktinfo into a socket control message of type IPV6_PKTINFO.
func PktInfo6(info *Inet6Pktinfo) []byte {
b := make([]byte, CmsgSpace(SizeofInet6Pktinfo))
h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
h.Level = SOL_IPV6
h.Type = IPV6_PKTINFO
h.SetLen(CmsgLen(SizeofInet6Pktinfo))
*(*Inet6Pktinfo)(h.data(0)) = *info
return b
}
// ParseOrigDstAddr decodes a socket control message containing the original
// destination address. To receive such a message the IP_RECVORIGDSTADDR or
// IPV6_RECVORIGDSTADDR option must be enabled on the socket.
func ParseOrigDstAddr(m *SocketControlMessage) (Sockaddr, error) {
switch {
case m.Header.Level == SOL_IP && m.Header.Type == IP_ORIGDSTADDR:
pp := (*RawSockaddrInet4)(unsafe.Pointer(&m.Data[0]))
sa := new(SockaddrInet4)
p := (*[2]byte)(unsafe.Pointer(&pp.Port))
sa.Port = int(p[0])<<8 + int(p[1])
sa.Addr = pp.Addr
return sa, nil
case m.Header.Level == SOL_IPV6 && m.Header.Type == IPV6_ORIGDSTADDR:
pp := (*RawSockaddrInet6)(unsafe.Pointer(&m.Data[0]))
sa := new(SockaddrInet6)
p := (*[2]byte)(unsafe.Pointer(&pp.Port))
sa.Port = int(p[0])<<8 + int(p[1])
sa.ZoneId = pp.Scope_id
sa.Addr = pp.Addr
return sa, nil
default:
return nil, EINVAL
}
}