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Diffstat (limited to 'vendor/golang.org/x/net/icmp/listen_posix.go')
-rw-r--r--vendor/golang.org/x/net/icmp/listen_posix.go100
1 files changed, 100 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/icmp/listen_posix.go b/vendor/golang.org/x/net/icmp/listen_posix.go
new file mode 100644
index 0000000..7fac4f9
--- /dev/null
+++ b/vendor/golang.org/x/net/icmp/listen_posix.go
@@ -0,0 +1,100 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package icmp
+
+import (
+ "net"
+ "os"
+ "runtime"
+ "syscall"
+
+ "golang.org/x/net/internal/iana"
+ "golang.org/x/net/ipv4"
+ "golang.org/x/net/ipv6"
+)
+
+const sysIP_STRIPHDR = 0x17 // for now only darwin supports this option
+
+// ListenPacket listens for incoming ICMP packets addressed to
+// address. See net.Dial for the syntax of address.
+//
+// For non-privileged datagram-oriented ICMP endpoints, network must
+// be "udp4" or "udp6". The endpoint allows to read, write a few
+// limited ICMP messages such as echo request and echo reply.
+// Currently only Darwin and Linux support this.
+//
+// Examples:
+// ListenPacket("udp4", "192.168.0.1")
+// ListenPacket("udp4", "0.0.0.0")
+// ListenPacket("udp6", "fe80::1%en0")
+// ListenPacket("udp6", "::")
+//
+// For privileged raw ICMP endpoints, network must be "ip4" or "ip6"
+// followed by a colon and an ICMP protocol number or name.
+//
+// Examples:
+// ListenPacket("ip4:icmp", "192.168.0.1")
+// ListenPacket("ip4:1", "0.0.0.0")
+// ListenPacket("ip6:ipv6-icmp", "fe80::1%en0")
+// ListenPacket("ip6:58", "::")
+func ListenPacket(network, address string) (*PacketConn, error) {
+ var family, proto int
+ switch network {
+ case "udp4":
+ family, proto = syscall.AF_INET, iana.ProtocolICMP
+ case "udp6":
+ family, proto = syscall.AF_INET6, iana.ProtocolIPv6ICMP
+ default:
+ i := last(network, ':')
+ switch network[:i] {
+ case "ip4":
+ proto = iana.ProtocolICMP
+ case "ip6":
+ proto = iana.ProtocolIPv6ICMP
+ }
+ }
+ var cerr error
+ var c net.PacketConn
+ switch family {
+ case syscall.AF_INET, syscall.AF_INET6:
+ s, err := syscall.Socket(family, syscall.SOCK_DGRAM, proto)
+ if err != nil {
+ return nil, os.NewSyscallError("socket", err)
+ }
+ if runtime.GOOS == "darwin" && family == syscall.AF_INET {
+ if err := syscall.SetsockoptInt(s, iana.ProtocolIP, sysIP_STRIPHDR, 1); err != nil {
+ syscall.Close(s)
+ return nil, os.NewSyscallError("setsockopt", err)
+ }
+ }
+ sa, err := sockaddr(family, address)
+ if err != nil {
+ syscall.Close(s)
+ return nil, err
+ }
+ if err := syscall.Bind(s, sa); err != nil {
+ syscall.Close(s)
+ return nil, os.NewSyscallError("bind", err)
+ }
+ f := os.NewFile(uintptr(s), "datagram-oriented icmp")
+ c, cerr = net.FilePacketConn(f)
+ f.Close()
+ default:
+ c, cerr = net.ListenPacket(network, address)
+ }
+ if cerr != nil {
+ return nil, cerr
+ }
+ switch proto {
+ case iana.ProtocolICMP:
+ return &PacketConn{c: c, p4: ipv4.NewPacketConn(c)}, nil
+ case iana.ProtocolIPv6ICMP:
+ return &PacketConn{c: c, p6: ipv6.NewPacketConn(c)}, nil
+ default:
+ return &PacketConn{c: c}, nil
+ }
+}