76 lines
1.4 KiB
Go
76 lines
1.4 KiB
Go
package tap
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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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tap_util "github.com/go-gost/x/internal/util/tap"
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)
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const (
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DefaultMTU = 1350
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)
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type metadata struct {
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config *tap_util.Config
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}
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func (l *tapListener) 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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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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config := &tap_util.Config{
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Name: mdutil.GetString(md, name),
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Net: mdutil.GetString(md, netKey),
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MTU: mdutil.GetInt(md, mtu),
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Gateway: mdutil.GetString(md, gateway),
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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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gw := net.ParseIP(config.Gateway)
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for _, s := range strings.Split(mdutil.GetString(md, route), ",") {
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var route tap_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 = gw
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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 tap_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 = gw
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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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