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sockopt_posix.go (1873B)

      1 // Copyright 2012 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || windows || zos
      6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris windows zos
      7 
      8 package ipv4
      9 
     10 import (
     11 	"net"
     12 	"unsafe"
     13 
     14 	"golang.org/x/net/bpf"
     15 	"golang.org/x/net/internal/socket"
     16 )
     17 
     18 func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
     19 	switch so.typ {
     20 	case ssoTypeIPMreqn:
     21 		return so.getIPMreqn(c)
     22 	default:
     23 		return so.getMulticastIf(c)
     24 	}
     25 }
     26 
     27 func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
     28 	switch so.typ {
     29 	case ssoTypeIPMreqn:
     30 		return so.setIPMreqn(c, ifi, nil)
     31 	default:
     32 		return so.setMulticastIf(c, ifi)
     33 	}
     34 }
     35 
     36 func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
     37 	b := make([]byte, so.Len)
     38 	n, err := so.Get(c, b)
     39 	if err != nil {
     40 		return nil, err
     41 	}
     42 	if n != sizeofICMPFilter {
     43 		return nil, errNotImplemented
     44 	}
     45 	return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil
     46 }
     47 
     48 func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
     49 	b := (*[sizeofICMPFilter]byte)(unsafe.Pointer(f))[:sizeofICMPFilter]
     50 	return so.Set(c, b)
     51 }
     52 
     53 func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
     54 	switch so.typ {
     55 	case ssoTypeIPMreq:
     56 		return so.setIPMreq(c, ifi, grp)
     57 	case ssoTypeIPMreqn:
     58 		return so.setIPMreqn(c, ifi, grp)
     59 	case ssoTypeGroupReq:
     60 		return so.setGroupReq(c, ifi, grp)
     61 	default:
     62 		return errNotImplemented
     63 	}
     64 }
     65 
     66 func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
     67 	return so.setGroupSourceReq(c, ifi, grp, src)
     68 }
     69 
     70 func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
     71 	return so.setAttachFilter(c, f)
     72 }