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//go:build linux
// +build linux
package rtnetlink_test
import (
"log"
"net"
"github.com/jsimonetti/rtnetlink/v2"
"golang.org/x/sys/unix"
)
// Add a route
func Example_addRoute() {
// Gather the interface Index
iface, _ := net.InterfaceByName("lo")
// Get a route to add
_, dst, _ := net.ParseCIDR("192.168.0.0/16")
// Get a gw to use
gw := net.ParseIP("127.0.0.1")
// Dial a connection to the rtnetlink socket
conn, err := rtnetlink.Dial(nil)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
attr := rtnetlink.RouteAttributes{
Dst: dst.IP,
OutIface: uint32(iface.Index),
}
if gw == nil {
attr.Gateway = gw
}
ones, _ := dst.Mask.Size()
err = conn.Route.Add(&rtnetlink.RouteMessage{
Family: unix.AF_INET,
Table: unix.RT_TABLE_MAIN,
Protocol: unix.RTPROT_BOOT,
Scope: unix.RT_SCOPE_LINK,
Type: unix.RTN_UNICAST,
DstLength: uint8(ones),
Attributes: attr,
})
log.Fatal(err)
}
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