de27caacfb
Calls to library functions now use entersyscall and exitsyscall as appropriate. This is a first step toward multiplexing goroutines onto threads. From-SVN: r180345
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Routing sockets and messages for Darwin
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package syscall
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import (
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"unsafe"
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)
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func (any *anyMessage) toRoutingMessage(buf []byte) RoutingMessage {
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switch any.Type {
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case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
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p := (*RouteMessage)(unsafe.Pointer(any))
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rtm := &RouteMessage{}
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rtm.Header = p.Header
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rtm.Data = buf[SizeofRtMsghdr:any.Msglen]
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return rtm
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case RTM_IFINFO:
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p := (*InterfaceMessage)(unsafe.Pointer(any))
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ifm := &InterfaceMessage{}
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ifm.Header = p.Header
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ifm.Data = buf[SizeofIfMsghdr:any.Msglen]
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return ifm
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case RTM_NEWADDR, RTM_DELADDR:
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p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
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ifam := &InterfaceAddrMessage{}
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ifam.Header = p.Header
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ifam.Data = buf[SizeofIfaMsghdr:any.Msglen]
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return ifam
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case RTM_NEWMADDR2, RTM_DELMADDR:
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p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
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ifmam := &InterfaceMulticastAddrMessage{}
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ifmam.Header = p.Header
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ifmam.Data = buf[SizeofIfmaMsghdr2:any.Msglen]
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return ifmam
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}
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return nil
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}
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// InterfaceMulticastAddrMessage represents a routing message
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// containing network interface address entries.
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type InterfaceMulticastAddrMessage struct {
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Header IfmaMsghdr2
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Data []byte
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}
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const rtaIfmaMask = RTA_GATEWAY | RTA_IFP | RTA_IFA
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func (m *InterfaceMulticastAddrMessage) sockaddr() (sas []Sockaddr) {
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if m.Header.Addrs&rtaIfmaMask == 0 {
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return nil
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}
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buf := m.Data[:]
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for i := uint(0); i < RTAX_MAX; i++ {
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if m.Header.Addrs&rtaIfmaMask&(1<<i) == 0 {
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continue
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}
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rsa := (*RawSockaddr)(unsafe.Pointer(&buf[0]))
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switch i {
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case RTAX_IFA:
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sa, e := anyToSockaddr((*RawSockaddrAny)(unsafe.Pointer(rsa)))
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if e != 0 {
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return nil
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}
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sas = append(sas, sa)
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case RTAX_GATEWAY, RTAX_IFP:
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// nothing to do
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}
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buf = buf[rsaAlignOf(int(rsa.Len)):]
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}
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return sas
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}
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