mirror of
https://github.com/jsimonetti/rtnetlink.git
synced 2026-03-28 15:31:09 +01:00
8026e5db33
In order to update to v2.0.0, we need to update the module path per the Go module documentation. * https://go.dev/doc/modules/major-version Fixes: https://github.com/jsimonetti/rtnetlink/issues/225 This can be released as v2.0.1 Signed-off-by: SuperQ <superq@gmail.com>
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
//go:build linux
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// +build linux
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package rtnetlink_test
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import (
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"encoding/binary"
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"log"
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"net"
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"github.com/jsimonetti/rtnetlink/v2"
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"golang.org/x/sys/unix"
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)
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// Add IP address '127.0.0.2/8' to an interface 'lo'
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func Example_addAddress() {
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// Gather the interface Index
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iface, _ := net.InterfaceByName("lo")
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// Get an ip address to add to the interface
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addr, cidr, _ := net.ParseCIDR("127.0.0.2/8")
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// Dial a connection to the rtnetlink socket
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conn, err := rtnetlink.Dial(nil)
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if err != nil {
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log.Fatal(err)
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}
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defer conn.Close()
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// Test for the right address family for addr
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family := unix.AF_INET6
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to4 := cidr.IP.To4()
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if to4 != nil {
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family = unix.AF_INET
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}
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// Calculate the prefix length
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ones, _ := cidr.Mask.Size()
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// Calculate the broadcast IP
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// Only used when family is AF_INET
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var brd net.IP
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if to4 != nil {
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brd = make(net.IP, len(to4))
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binary.BigEndian.PutUint32(brd, binary.BigEndian.Uint32(to4)|^binary.BigEndian.Uint32(net.IP(cidr.Mask).To4()))
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}
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// Send the message using the rtnetlink.Conn
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err = conn.Address.New(&rtnetlink.AddressMessage{
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Family: uint8(family),
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PrefixLength: uint8(ones),
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Scope: unix.RT_SCOPE_UNIVERSE,
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Index: uint32(iface.Index),
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Attributes: &rtnetlink.AddressAttributes{
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Address: addr,
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Local: addr,
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Broadcast: brd,
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},
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})
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log.Fatal(err)
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}
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