github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/ipv4/sys_freebsd.go (about)

     1  // Copyright 2014 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  package ipv4
     6  
     7  import (
     8  	"net"
     9  	"runtime"
    10  	"strings"
    11  	"syscall"
    12  	"unsafe"
    13  )
    14  
    15  type sysSockoptLen int32
    16  
    17  var (
    18  	ctlOpts = [ctlMax]ctlOpt{
    19  		ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
    20  		ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
    21  		ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
    22  	}
    23  
    24  	sockOpts = [ssoMax]sockOpt{
    25  		ssoTOS:                {sysIP_TOS, ssoTypeInt},
    26  		ssoTTL:                {sysIP_TTL, ssoTypeInt},
    27  		ssoMulticastTTL:       {sysIP_MULTICAST_TTL, ssoTypeByte},
    28  		ssoMulticastInterface: {sysIP_MULTICAST_IF, ssoTypeInterface},
    29  		ssoMulticastLoopback:  {sysIP_MULTICAST_LOOP, ssoTypeInt},
    30  		ssoReceiveTTL:         {sysIP_RECVTTL, ssoTypeInt},
    31  		ssoReceiveDst:         {sysIP_RECVDSTADDR, ssoTypeInt},
    32  		ssoReceiveInterface:   {sysIP_RECVIF, ssoTypeInt},
    33  		ssoHeaderPrepend:      {sysIP_HDRINCL, ssoTypeInt},
    34  		ssoJoinGroup:          {sysMCAST_JOIN_GROUP, ssoTypeGroupReq},
    35  		ssoLeaveGroup:         {sysMCAST_LEAVE_GROUP, ssoTypeGroupReq},
    36  		ssoJoinSourceGroup:    {sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq},
    37  		ssoLeaveSourceGroup:   {sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq},
    38  		ssoBlockSourceGroup:   {sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq},
    39  		ssoUnblockSourceGroup: {sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq},
    40  	}
    41  )
    42  
    43  func init() {
    44  	freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
    45  	if freebsdVersion >= 1000000 {
    46  		sockOpts[ssoMulticastInterface].typ = ssoTypeIPMreqn
    47  	}
    48  	if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
    49  		archs, _ := syscall.Sysctl("kern.supported_archs")
    50  		for _, s := range strings.Fields(archs) {
    51  			if s == "amd64" {
    52  				freebsd32o64 = true
    53  				break
    54  			}
    55  		}
    56  	}
    57  }
    58  
    59  func (gr *sysGroupReq) setGroup(grp net.IP) {
    60  	sa := (*sysSockaddrInet)(unsafe.Pointer(&gr.Group))
    61  	sa.Len = sysSizeofSockaddrInet
    62  	sa.Family = syscall.AF_INET
    63  	copy(sa.Addr[:], grp)
    64  }
    65  
    66  func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
    67  	sa := (*sysSockaddrInet)(unsafe.Pointer(&gsr.Group))
    68  	sa.Len = sysSizeofSockaddrInet
    69  	sa.Family = syscall.AF_INET
    70  	copy(sa.Addr[:], grp)
    71  	sa = (*sysSockaddrInet)(unsafe.Pointer(&gsr.Source))
    72  	sa.Len = sysSizeofSockaddrInet
    73  	sa.Family = syscall.AF_INET
    74  	copy(sa.Addr[:], src)
    75  }