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Added routing table support

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This commit is contained in:
Neven Miculinic 2019-03-26 14:01:02 +01:00
parent f2375340a4
commit a35edbde22
1 changed files with 9 additions and 2 deletions
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9
wg.go
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@ -19,21 +19,24 @@ type Config struct {
Address []*net.IPNet
// list of IP (v4 or v6) addresses to be set as the interface’s DNS servers. May be specified multiple times. Upon bringing the interface up, this runs ‘resolvconf -a tun.INTERFACE -m 0 -x‘ and upon bringing it down, this runs ‘resolvconf -d tun.INTERFACE‘. If these particular invocations of resolvconf(8) are undesirable, the PostUp and PostDown keys below may be used instead.
// Currently unsupported
DNS []net.IP
// —if not specified, the MTU is automatically determined from the endpoint addresses or the system default route, which is usually a sane choice. However, to manually specify an MTU to override this automatic discovery, this value may be specified explicitly.
MTU int
// Table — Controls the routing table to which routes are added. There are two special values: ‘off’ disables the creation of routes altogether, and ‘auto’ (the default) adds routes to the default table and enables special handling of default routes.
// Table — Controls the routing table to which routes are added.
Table int
// PreUp, PostUp, PreDown, PostDown — script snippets which will be executed by bash(1) before/after setting up/tearing down the interface, most commonly used to configure custom DNS options or firewall rules. The special string ‘%i’ is expanded to INTERFACE. Each one may be specified multiple times, in which case the commands are executed in order.
// Currently unsupported
PreUp string
PostUp string
PreDown string
PostDown string
// SaveConfig — if set to ‘true’, the configuration is saved from the current state of the interface upon shutdown.
// Currently unsupported
SaveConfig bool
}
@ -216,8 +219,10 @@ func syncRoutes(link netlink.Link, cfg *Config, log logrus.FieldLogger) error {
presentRoutes := make(map[string]int, 0)
for _, r := range routes {
if r.Table == cfg.Table {
presentRoutes[r.Dst.String()] = 1
}
}
for _, peer := range cfg.Peers {
for _, rt := range peer.AllowedIPs {
@ -231,6 +236,7 @@ func syncRoutes(link netlink.Link, cfg *Config, log logrus.FieldLogger) error {
if err := netlink.RouteAdd(&netlink.Route{
LinkIndex: link.Attrs().Index,
Dst: &rt,
Table: cfg.Table,
}); err != nil {
log.WithError(err).Error("cannot setup route")
return err
@ -252,6 +258,7 @@ func syncRoutes(link netlink.Link, cfg *Config, log logrus.FieldLogger) error {
if err := netlink.RouteDel(&netlink.Route{
LinkIndex: link.Attrs().Index,
Dst: rt,
Table: cfg.Table,
}); err != nil {
log.WithError(err).Error("cannot setup route")
return err