sockopt_posix.go

Documentation: golang.org/x/net/ipv4

     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  
     7  package ipv4
     8  
     9  import (
    10  	"net"
    11  	"unsafe"
    12  
    13  	"golang.org/x/net/bpf"
    14  	"golang.org/x/net/internal/socket"
    15  )
    16  
    17  func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
    18  	switch so.typ {
    19  	case ssoTypeIPMreqn:
    20  		return so.getIPMreqn(c)
    21  	default:
    22  		return so.getMulticastIf(c)
    23  	}
    24  }
    25  
    26  func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
    27  	switch so.typ {
    28  	case ssoTypeIPMreqn:
    29  		return so.setIPMreqn(c, ifi, nil)
    30  	default:
    31  		return so.setMulticastIf(c, ifi)
    32  	}
    33  }
    34  
    35  func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
    36  	b := make([]byte, so.Len)
    37  	n, err := so.Get(c, b)
    38  	if err != nil {
    39  		return nil, err
    40  	}
    41  	if n != sizeofICMPFilter {
    42  		return nil, errNotImplemented
    43  	}
    44  	return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil
    45  }
    46  
    47  func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
    48  	b := (*[sizeofICMPFilter]byte)(unsafe.Pointer(f))[:sizeofICMPFilter]
    49  	return so.Set(c, b)
    50  }
    51  
    52  func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
    53  	switch so.typ {
    54  	case ssoTypeIPMreq:
    55  		return so.setIPMreq(c, ifi, grp)
    56  	case ssoTypeIPMreqn:
    57  		return so.setIPMreqn(c, ifi, grp)
    58  	case ssoTypeGroupReq:
    59  		return so.setGroupReq(c, ifi, grp)
    60  	default:
    61  		return errNotImplemented
    62  	}
    63  }
    64  
    65  func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
    66  	return so.setGroupSourceReq(c, ifi, grp, src)
    67  }
    68  
    69  func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
    70  	return so.setAttachFilter(c, f)
    71  }
    72
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