1 files changed, 0 insertions, 105 deletions
diff --git a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/udp_linux.go b/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/udp_linux.go
deleted file mode 100644
index 033df4239..000000000
--- a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/udp_linux.go
+++ /dev/null
@@ -1,105 +0,0 @@
-// +build linux,!appengine
-
-package dns
-
-// See:
-// * http://stackoverflow.com/questions/3062205/setting-the-source-ip-for-a-udp-socket and
-// * http://blog.powerdns.com/2012/10/08/on-binding-datagram-udp-sockets-to-the-any-addresses/
-//
-// Why do we need this: When listening on 0.0.0.0 with UDP so kernel decides what is the outgoing
-// interface, this might not always be the correct one. This code will make sure the egress
-// packet's interface matched the ingress' one.
-
-import (
-	"net"
-	"syscall"
-)
-
-// setUDPSocketOptions sets the UDP socket options.
-// This function is implemented on a per platform basis. See udp_*.go for more details
-func setUDPSocketOptions(conn *net.UDPConn) error {
-	sa, err := getUDPSocketName(conn)
-	if err != nil {
-		return err
-	}
-	switch sa.(type) {
-	case *syscall.SockaddrInet6:
-		v6only, err := getUDPSocketOptions6Only(conn)
-		if err != nil {
-			return err
-		}
-		setUDPSocketOptions6(conn)
-		if !v6only {
-			setUDPSocketOptions4(conn)
-		}
-	case *syscall.SockaddrInet4:
-		setUDPSocketOptions4(conn)
-	}
-	return nil
-}
-
-// setUDPSocketOptions4 prepares the v4 socket for sessions.
-func setUDPSocketOptions4(conn *net.UDPConn) error {
-	file, err := conn.File()
-	if err != nil {
-		return err
-	}
-	if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IP, syscall.IP_PKTINFO, 1); err != nil {
-		file.Close()
-		return err
-	}
-	// Calling File() above results in the connection becoming blocking, we must fix that.
-	// See https://github.com/miekg/dns/issues/279
-	err = syscall.SetNonblock(int(file.Fd()), true)
-	if err != nil {
-		file.Close()
-		return err
-	}
-	file.Close()
-	return nil
-}
-
-// setUDPSocketOptions6 prepares the v6 socket for sessions.
-func setUDPSocketOptions6(conn *net.UDPConn) error {
-	file, err := conn.File()
-	if err != nil {
-		return err
-	}
-	if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IPV6, syscall.IPV6_RECVPKTINFO, 1); err != nil {
-		file.Close()
-		return err
-	}
-	err = syscall.SetNonblock(int(file.Fd()), true)
-	if err != nil {
-		file.Close()
-		return err
-	}
-	file.Close()
-	return nil
-}
-
-// getUDPSocketOption6Only return true if the socket is v6 only and false when it is v4/v6 combined
-// (dualstack).
-func getUDPSocketOptions6Only(conn *net.UDPConn) (bool, error) {
-	file, err := conn.File()
-	if err != nil {
-		return false, err
-	}
-	// dual stack. See http://stackoverflow.com/questions/1618240/how-to-support-both-ipv4-and-ipv6-connections
-	v6only, err := syscall.GetsockoptInt(int(file.Fd()), syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY)
-	if err != nil {
-		file.Close()
-		return false, err
-	}
-	file.Close()
-	return v6only == 1, nil
-}
-
-func getUDPSocketName(conn *net.UDPConn) (syscall.Sockaddr, error) {
-	file, err := conn.File()
-	if err != nil {
-		return nil, err
-	}
-	defer file.Close()
-	return syscall.Getsockname(int(file.Fd()))
-}