98 lines
2.0 KiB
Go
98 lines
2.0 KiB
Go
package tun
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import (
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"net"
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"strings"
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mdata "github.com/go-gost/core/metadata"
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mdutil "github.com/go-gost/core/metadata/util"
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tun_util "github.com/go-gost/x/internal/util/tun"
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)
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const (
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defaultMTU = 1350
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defaultReadBufferSize = 4096
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)
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type metadata struct {
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config *tun_util.Config
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readBufferSize int
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}
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func (l *tunListener) parseMetadata(md mdata.Metadata) (err error) {
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const (
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name = "name"
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netKey = "net"
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peer = "peer"
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mtu = "mtu"
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route = "route"
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routes = "routes"
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gateway = "gw"
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)
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l.md.readBufferSize = mdutil.GetInt(md, "tun.rbuf", "rbuf", "readBufferSize")
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if l.md.readBufferSize <= 0 {
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l.md.readBufferSize = defaultReadBufferSize
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}
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config := &tun_util.Config{
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Name: mdutil.GetString(md, name),
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Peer: mdutil.GetString(md, peer),
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MTU: mdutil.GetInt(md, mtu),
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}
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if config.MTU <= 0 {
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config.MTU = defaultMTU
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}
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if gw := mdutil.GetString(md, gateway); gw != "" {
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config.Gateway = net.ParseIP(gw)
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}
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for _, s := range strings.Split(mdutil.GetString(md, netKey), ",") {
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if s = strings.TrimSpace(s); s == "" {
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continue
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}
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ip, ipNet, err := net.ParseCIDR(s)
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if err != nil {
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continue
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}
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config.Net = append(config.Net, net.IPNet{
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IP: ip,
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Mask: ipNet.Mask,
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})
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}
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for _, s := range strings.Split(mdutil.GetString(md, route), ",") {
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var route tun_util.Route
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_, ipNet, _ := net.ParseCIDR(strings.TrimSpace(s))
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if ipNet == nil {
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continue
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}
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route.Net = *ipNet
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route.Gateway = config.Gateway
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config.Routes = append(config.Routes, route)
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}
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for _, s := range mdutil.GetStrings(md, routes) {
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ss := strings.SplitN(s, " ", 2)
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if len(ss) == 2 {
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var route tun_util.Route
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_, ipNet, _ := net.ParseCIDR(strings.TrimSpace(ss[0]))
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if ipNet == nil {
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continue
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}
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route.Net = *ipNet
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route.Gateway = net.ParseIP(ss[1])
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if route.Gateway == nil {
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route.Gateway = config.Gateway
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}
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config.Routes = append(config.Routes, route)
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}
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}
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l.md.config = config
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return
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}
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