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refactor: 使用 netlink 配置 ip rule

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This commit is contained in:
adlyq
2022-05-29 15:03:27 +08:00
parent 39e7832676
commit 13e907bbd0
4 changed files with 61 additions and 26 deletions
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65
listener/tun/ipstack/commons/router_android.go
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@ -57,6 +57,7 @@ func ConfigInterfaceAddress(dev device.Device, addr netip.Prefix, forceMTU int,
func configInterfaceRouting(index int, interfaceName string, ip netip.Addr) error {
const tableId = 1981801
var pref = 9000
for _, route := range defaultRoutes {
_, ipn, err := net.ParseCIDR(route)
@ -75,25 +76,51 @@ func configInterfaceRouting(index int, interfaceName string, ip netip.Addr) erro
return err
}
}
execAddRuleCmd(fmt.Sprintf("lookup main pref 9000"))
execAddRuleCmd(fmt.Sprintf("from 0.0.0.0 iif lo uidrange 0-4294967294 lookup %d pref 9001", tableId))
execAddRuleCmd(fmt.Sprintf("from %s iif lo uidrange 0-4294967294 lookup %d pref 9002", ip, tableId))
execAddRuleCmd(fmt.Sprintf("from all iif %s lookup main suppress_prefixlength 0 pref 9003", interfaceName))
execAddRuleCmd(fmt.Sprintf("not from all iif lo lookup %d pref 9004", tableId))
logIfErr := func(e error) {
if e != nil {
log.Warnln("[TOUTE] config route rule: %s", e)
}
}
var r *netlink.Rule
r = netlink.NewRule()
r.Table = 254
r.Priority = pref
logIfErr(netlink.RuleAdd(r))
pref += 10
r = netlink.NewRule()
_, nl, _ := net.ParseCIDR("0.0.0.0/32")
r.Table = tableId
r.Priority = pref
r.Src = nl
r.IifName = "lo"
r.UID = netlink.NewRuleUIDRange(0, 4294967294)
logIfErr(netlink.RuleAdd(r))
pref += 10
_, nl, _ = net.ParseCIDR(ip.String())
r.Priority = pref
r.Src = nl
logIfErr(netlink.RuleAdd(r))
pref += 10
r = netlink.NewRule()
r.Table = 254
r.Priority = pref
r.IifName = interfaceName
r.SuppressPrefixlen = 0
logIfErr(netlink.RuleAdd(r))
pref += 10
r = netlink.NewRule()
r.Table = tableId
r.Priority = pref
r.IifName = "lo"
r.SuppressPrefixlen = 0
r.Invert = true
logIfErr(netlink.RuleAdd(r))
return nil
}
func execAddRuleCmd(rule string) {
_, err := cmd.ExecCmd("ip rule add " + rule)
if err != nil {
log.Warnln("%s", err)
}
}
func execRouterCmd(action, route, interfaceName, linkIP, table string) error {
cmdStr := fmt.Sprintf("ip route %s %s dev %s proto kernel scope link src %s table %s", action, route, interfaceName, linkIP, table)
_, err := cmd.ExecCmd(cmdStr)
return err
}