diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/syscall/route_bsd.go')
-rw-r--r-- | gcc-4.8.1/libgo/go/syscall/route_bsd.go | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/gcc-4.8.1/libgo/go/syscall/route_bsd.go b/gcc-4.8.1/libgo/go/syscall/route_bsd.go deleted file mode 100644 index e17d976b1..000000000 --- a/gcc-4.8.1/libgo/go/syscall/route_bsd.go +++ /dev/null @@ -1,201 +0,0 @@ -// 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. - -// +build darwin freebsd netbsd openbsd - -// Routing sockets and messages - -package syscall - -import ( - "unsafe" -) - -// Round the length of a raw sockaddr up to align it properly. -func rsaAlignOf(salen int) int { - salign := sizeofPtr - // NOTE: It seems like 64-bit Darwin kernel still requires 32-bit - // aligned access to BSD subsystem. - if darwinAMD64 { - salign = 4 - } - if salen == 0 { - return salign - } - return (salen + salign - 1) & ^(salign - 1) -} - -// RouteRIB returns routing information base, as known as RIB, -// which consists of network facility information, states and -// parameters. -func RouteRIB(facility, param int) ([]byte, error) { - mib := []_C_int{CTL_NET, AF_ROUTE, 0, 0, _C_int(facility), _C_int(param)} - - // Find size. - n := uintptr(0) - if err := sysctl(mib, nil, &n, nil, 0); err != nil { - return nil, err - } - if n == 0 { - return nil, nil - } - - tab := make([]byte, n) - if err := sysctl(mib, &tab[0], &n, nil, 0); err != nil { - return nil, err - } - - return tab[:n], nil -} - -// RoutingMessage represents a routing message. -type RoutingMessage interface { - sockaddr() []Sockaddr -} - -const anyMessageLen = int(unsafe.Sizeof(anyMessage{})) - -type anyMessage struct { - Msglen uint16 - Version uint8 - Type uint8 -} - -// RouteMessage represents a routing message containing routing -// entries. -type RouteMessage struct { - Header RtMsghdr - Data []byte -} - -const rtaRtMask = RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_GENMASK - -func (m *RouteMessage) sockaddr() []Sockaddr { - var ( - af int - sas [4]Sockaddr - ) - - buf := m.Data[:] - for i := uint(0); i < RTAX_MAX; i++ { - if m.Header.Addrs&rtaRtMask&(1<<i) == 0 { - continue - } - rsa := (*RawSockaddr)(unsafe.Pointer(&buf[0])) - switch i { - case RTAX_DST, RTAX_GATEWAY: - sa, err := anyToSockaddr((*RawSockaddrAny)(unsafe.Pointer(rsa))) - if err != nil { - return nil - } - if i == RTAX_DST { - af = int(rsa.Family) - } - sas[i] = sa - case RTAX_NETMASK, RTAX_GENMASK: - switch af { - case AF_INET: - rsa4 := (*RawSockaddrInet4)(unsafe.Pointer(&buf[0])) - sa := new(SockaddrInet4) - for j := 0; rsa4.Len > 0 && j < int(rsa4.Len)-int(unsafe.Offsetof(rsa4.Addr)); j++ { - sa.Addr[j] = rsa4.Addr[j] - } - sas[i] = sa - case AF_INET6: - rsa6 := (*RawSockaddrInet6)(unsafe.Pointer(&buf[0])) - sa := new(SockaddrInet6) - for j := 0; rsa6.Len > 0 && j < int(rsa6.Len)-int(unsafe.Offsetof(rsa6.Addr)); j++ { - sa.Addr[j] = rsa6.Addr[j] - } - sas[i] = sa - } - } - buf = buf[rsaAlignOf(int(rsa.Len)):] - } - - return sas[:] -} - -// InterfaceMessage represents a routing message containing -// network interface entries. -type InterfaceMessage struct { - Header IfMsghdr - Data []byte -} - -func (m *InterfaceMessage) sockaddr() (sas []Sockaddr) { - if m.Header.Addrs&RTA_IFP == 0 { - return nil - } - sa, err := anyToSockaddr((*RawSockaddrAny)(unsafe.Pointer(&m.Data[0]))) - if err != nil { - return nil - } - return append(sas, sa) -} - -// InterfaceAddrMessage represents a routing message containing -// network interface address entries. -type InterfaceAddrMessage struct { - Header IfaMsghdr - Data []byte -} - -const rtaIfaMask = RTA_IFA | RTA_NETMASK | RTA_BRD - -func (m *InterfaceAddrMessage) sockaddr() (sas []Sockaddr) { - if m.Header.Addrs&rtaIfaMask == 0 { - return nil - } - - buf := m.Data[:] - for i := uint(0); i < RTAX_MAX; i++ { - if m.Header.Addrs&rtaIfaMask&(1<<i) == 0 { - continue - } - rsa := (*RawSockaddr)(unsafe.Pointer(&buf[0])) - switch i { - case RTAX_IFA: - sa, err := anyToSockaddr((*RawSockaddrAny)(unsafe.Pointer(rsa))) - if err != nil { - return nil - } - sas = append(sas, sa) - case RTAX_NETMASK: - if rsa.Family == AF_UNSPEC { - rsa.Family = AF_INET // an old fasion, AF_UNSPEC means AF_INET - } - sa, err := anyToSockaddr((*RawSockaddrAny)(unsafe.Pointer(rsa))) - if err != nil { - return nil - } - sas = append(sas, sa) - case RTAX_BRD: - // nothing to do - } - buf = buf[rsaAlignOf(int(rsa.Len)):] - } - - return sas -} - -// ParseRoutingMessage parses buf as routing messages and returns -// the slice containing the RoutingMessage interfaces. -func ParseRoutingMessage(buf []byte) (msgs []RoutingMessage, err error) { - for len(buf) >= anyMessageLen { - any := (*anyMessage)(unsafe.Pointer(&buf[0])) - if any.Version != RTM_VERSION { - return nil, EINVAL - } - msgs = append(msgs, any.toRoutingMessage(buf)) - buf = buf[any.Msglen:] - } - return msgs, nil -} - -// ParseRoutingMessage parses msg's payload as raw sockaddrs and -// returns the slice containing the Sockaddr interfaces. -func ParseRoutingSockaddr(msg RoutingMessage) (sas []Sockaddr, err error) { - return append(sas, msg.sockaddr()...), nil -} |