sing-box/route/rule_set.go
2024-07-25 09:39:14 +08:00

89 lines
2.3 KiB
Go

package route
import (
"context"
"net"
"net/http"
"sync"
"github.com/sagernet/sing-box/adapter"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing/common"
E "github.com/sagernet/sing/common/exceptions"
"github.com/sagernet/sing/common/logger"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
"go4.org/netipx"
)
func NewRuleSet(ctx context.Context, router adapter.Router, logger logger.ContextLogger, options option.RuleSet) (adapter.RuleSet, error) {
switch options.Type {
case C.RuleSetTypeLocal:
return NewLocalRuleSet(router, options)
case C.RuleSetTypeRemote:
return NewRemoteRuleSet(ctx, router, logger, options), nil
default:
return nil, E.New("unknown rule set type: ", options.Type)
}
}
func extractIPSetFromRule(rawRule adapter.HeadlessRule) []*netipx.IPSet {
switch rule := rawRule.(type) {
case *DefaultHeadlessRule:
return common.FlatMap(rule.destinationIPCIDRItems, func(rawItem RuleItem) []*netipx.IPSet {
switch item := rawItem.(type) {
case *IPCIDRItem:
return []*netipx.IPSet{item.ipSet}
default:
return nil
}
})
case *LogicalHeadlessRule:
return common.FlatMap(rule.rules, extractIPSetFromRule)
default:
panic("unexpected rule type")
}
}
var _ adapter.RuleSetStartContext = (*RuleSetStartContext)(nil)
type RuleSetStartContext struct {
access sync.Mutex
httpClientCache map[string]*http.Client
}
func NewRuleSetStartContext() *RuleSetStartContext {
return &RuleSetStartContext{
httpClientCache: make(map[string]*http.Client),
}
}
func (c *RuleSetStartContext) HTTPClient(detour string, dialer N.Dialer) *http.Client {
c.access.Lock()
defer c.access.Unlock()
if httpClient, loaded := c.httpClientCache[detour]; loaded {
return httpClient
}
httpClient := &http.Client{
Transport: &http.Transport{
ForceAttemptHTTP2: true,
TLSHandshakeTimeout: C.TCPTimeout,
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
return dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
},
},
}
c.httpClientCache[detour] = httpClient
return httpClient
}
func (c *RuleSetStartContext) Close() {
c.access.Lock()
defer c.access.Unlock()
for _, client := range c.httpClientCache {
client.CloseIdleConnections()
}
}