diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/net/interface_linux.go')
-rw-r--r-- | gcc-4.8.1/libgo/go/net/interface_linux.go | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/gcc-4.8.1/libgo/go/net/interface_linux.go b/gcc-4.8.1/libgo/go/net/interface_linux.go deleted file mode 100644 index ce2e921e8..000000000 --- a/gcc-4.8.1/libgo/go/net/interface_linux.go +++ /dev/null @@ -1,234 +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. - -// Network interface identification for Linux - -package net - -import ( - "os" - "syscall" - "unsafe" -) - -// If the ifindex is zero, interfaceTable returns mappings of all -// network interfaces. Otherwise it returns a mapping of a specific -// interface. -func interfaceTable(ifindex int) ([]Interface, error) { - tab, err := syscall.NetlinkRIB(syscall.RTM_GETLINK, syscall.AF_UNSPEC) - if err != nil { - return nil, os.NewSyscallError("netlink rib", err) - } - - msgs, err := syscall.ParseNetlinkMessage(tab) - if err != nil { - return nil, os.NewSyscallError("netlink message", err) - } - - var ift []Interface - for _, m := range msgs { - switch m.Header.Type { - case syscall.NLMSG_DONE: - goto done - case syscall.RTM_NEWLINK: - ifim := (*syscall.IfInfomsg)(unsafe.Pointer(&m.Data[0])) - if ifindex == 0 || ifindex == int(ifim.Index) { - attrs, err := syscall.ParseNetlinkRouteAttr(&m) - if err != nil { - return nil, os.NewSyscallError("netlink routeattr", err) - } - ifi := newLink(ifim, attrs) - ift = append(ift, ifi) - } - } - } -done: - return ift, nil -} - -func newLink(ifim *syscall.IfInfomsg, attrs []syscall.NetlinkRouteAttr) Interface { - ifi := Interface{Index: int(ifim.Index), Flags: linkFlags(ifim.Flags)} - for _, a := range attrs { - switch a.Attr.Type { - case syscall.IFLA_ADDRESS: - var nonzero bool - for _, b := range a.Value { - if b != 0 { - nonzero = true - } - } - if nonzero { - ifi.HardwareAddr = a.Value[:] - } - case syscall.IFLA_IFNAME: - ifi.Name = string(a.Value[:len(a.Value)-1]) - case syscall.IFLA_MTU: - ifi.MTU = int(*(*uint32)(unsafe.Pointer(&a.Value[:4][0]))) - } - } - return ifi -} - -func linkFlags(rawFlags uint32) Flags { - var f Flags - if rawFlags&syscall.IFF_UP != 0 { - f |= FlagUp - } - if rawFlags&syscall.IFF_BROADCAST != 0 { - f |= FlagBroadcast - } - if rawFlags&syscall.IFF_LOOPBACK != 0 { - f |= FlagLoopback - } - if rawFlags&syscall.IFF_POINTOPOINT != 0 { - f |= FlagPointToPoint - } - if rawFlags&syscall.IFF_MULTICAST != 0 { - f |= FlagMulticast - } - return f -} - -// If the ifindex is zero, interfaceAddrTable returns addresses -// for all network interfaces. Otherwise it returns addresses -// for a specific interface. -func interfaceAddrTable(ifindex int) ([]Addr, error) { - tab, err := syscall.NetlinkRIB(syscall.RTM_GETADDR, syscall.AF_UNSPEC) - if err != nil { - return nil, os.NewSyscallError("netlink rib", err) - } - - msgs, err := syscall.ParseNetlinkMessage(tab) - if err != nil { - return nil, os.NewSyscallError("netlink message", err) - } - - ifat, err := addrTable(msgs, ifindex) - if err != nil { - return nil, err - } - return ifat, nil -} - -func addrTable(msgs []syscall.NetlinkMessage, ifindex int) ([]Addr, error) { - var ifat []Addr - for _, m := range msgs { - switch m.Header.Type { - case syscall.NLMSG_DONE: - goto done - case syscall.RTM_NEWADDR: - ifam := (*syscall.IfAddrmsg)(unsafe.Pointer(&m.Data[0])) - if ifindex == 0 || ifindex == int(ifam.Index) { - attrs, err := syscall.ParseNetlinkRouteAttr(&m) - if err != nil { - return nil, os.NewSyscallError("netlink routeattr", err) - } - ifat = append(ifat, newAddr(attrs, int(ifam.Family), int(ifam.Prefixlen))) - } - } - } -done: - return ifat, nil -} - -func newAddr(attrs []syscall.NetlinkRouteAttr, family, pfxlen int) Addr { - ifa := &IPNet{} - for _, a := range attrs { - switch a.Attr.Type { - case syscall.IFA_ADDRESS: - switch family { - case syscall.AF_INET: - ifa.IP = IPv4(a.Value[0], a.Value[1], a.Value[2], a.Value[3]) - ifa.Mask = CIDRMask(pfxlen, 8*IPv4len) - case syscall.AF_INET6: - ifa.IP = make(IP, IPv6len) - copy(ifa.IP, a.Value[:]) - ifa.Mask = CIDRMask(pfxlen, 8*IPv6len) - } - } - } - return ifa -} - -// If the ifindex is zero, interfaceMulticastAddrTable returns -// addresses for all network interfaces. Otherwise it returns -// addresses for a specific interface. -func interfaceMulticastAddrTable(ifindex int) ([]Addr, error) { - var ( - err error - ifi *Interface - ) - if ifindex > 0 { - ifi, err = InterfaceByIndex(ifindex) - if err != nil { - return nil, err - } - } - ifmat4 := parseProcNetIGMP("/proc/net/igmp", ifi) - ifmat6 := parseProcNetIGMP6("/proc/net/igmp6", ifi) - return append(ifmat4, ifmat6...), nil -} - -func parseProcNetIGMP(path string, ifi *Interface) []Addr { - fd, err := open(path) - if err != nil { - return nil - } - defer fd.close() - - var ( - ifmat []Addr - name string - ) - fd.readLine() // skip first line - b := make([]byte, IPv4len) - for l, ok := fd.readLine(); ok; l, ok = fd.readLine() { - f := splitAtBytes(l, " :\r\t\n") - if len(f) < 4 { - continue - } - switch { - case l[0] != ' ' && l[0] != '\t': // new interface line - name = f[1] - case len(f[0]) == 8: - if ifi == nil || name == ifi.Name { - // The Linux kernel puts the IP - // address in /proc/net/igmp in native - // endianness. - for i := 0; i+1 < len(f[0]); i += 2 { - b[i/2], _ = xtoi2(f[0][i:i+2], 0) - } - i := *(*uint32)(unsafe.Pointer(&b[:4][0])) - ifma := IPAddr{IP: IPv4(byte(i>>24), byte(i>>16), byte(i>>8), byte(i))} - ifmat = append(ifmat, ifma.toAddr()) - } - } - } - return ifmat -} - -func parseProcNetIGMP6(path string, ifi *Interface) []Addr { - fd, err := open(path) - if err != nil { - return nil - } - defer fd.close() - - var ifmat []Addr - b := make([]byte, IPv6len) - for l, ok := fd.readLine(); ok; l, ok = fd.readLine() { - f := splitAtBytes(l, " \r\t\n") - if len(f) < 6 { - continue - } - if ifi == nil || f[1] == ifi.Name { - for i := 0; i+1 < len(f[2]); i += 2 { - b[i/2], _ = xtoi2(f[2][i:i+2], 0) - } - ifma := IPAddr{IP: IP{b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15]}} - ifmat = append(ifmat, ifma.toAddr()) - } - } - return ifmat -} |