/
new.go
131 lines (106 loc) · 2.57 KB
/
new.go
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package routeman
import (
"regexp"
"github.com/black-desk/cgtproxy/pkg/cgtproxy/config"
"github.com/black-desk/cgtproxy/pkg/interfaces"
"github.com/black-desk/cgtproxy/pkg/types"
. "github.com/black-desk/lib/go/errwrap"
"github.com/vishvananda/netlink"
"go.uber.org/zap"
)
type RouteManager struct {
cgroupEventsChan <-chan types.CGroupEvents
nft interfaces.NFTManager
cfg *config.Config
log *zap.SugaredLogger
matchers []*struct {
reg *regexp.Regexp
target types.Target
}
rule []*netlink.Rule
route []*netlink.Route
}
//go:generate go run github.com/rjeczalik/interfaces/cmd/interfacer@v0.3.0 -for github.com/black-desk/cgtproxy/pkg/routeman.RouteManager -as interfaces.RouteManager -o ../interfaces/routeman.go
func New(opts ...Opt) (ret *RouteManager, err error) {
defer Wrap(&err, "create the nftable rule manager")
m := &RouteManager{}
for i := range opts {
m, err = opts[i](m)
if err != nil {
return
}
}
if m.log == nil {
m.log = zap.NewNop().Sugar()
}
for i := range m.cfg.Rules {
regex := m.cfg.Rules[i].Match
var matcher struct {
reg *regexp.Regexp
target types.Target
}
matcher.reg, err = regexp.Compile(regex)
if err != nil {
return
}
if m.cfg.Rules[i].Direct {
matcher.target.Op = types.TargetDirect
} else if m.cfg.Rules[i].Drop {
matcher.target.Op = types.TargetDrop
} else if m.cfg.Rules[i].TProxy != "" {
matcher.target.Op = types.TargetTProxy
matcher.target.Chain =
m.cfg.TProxies[m.cfg.Rules[i].TProxy].Name
} else {
panic("this should never happened.")
}
if matcher.target.Chain != "" {
matcher.target.Chain += "-MARK"
}
m.matchers = append(m.matchers, &matcher)
}
ret = m
m.log.Debugw("Create a new route manager.")
return
}
type Opt func(m *RouteManager) (ret *RouteManager, err error)
func WithNFTMan(t interfaces.NFTManager) Opt {
return func(m *RouteManager) (ret *RouteManager, err error) {
if t == nil {
err = ErrNFTManagerMissing
return
}
m.nft = t
ret = m
return
}
}
func WithConfig(c *config.Config) Opt {
return func(m *RouteManager) (ret *RouteManager, err error) {
if c == nil {
err = ErrConfigMissing
return
}
m.cfg = c
ret = m
return
}
}
func WithCGroupEventChan(ch <-chan types.CGroupEvents) Opt {
return func(m *RouteManager) (ret *RouteManager, err error) {
if ch == nil {
err = ErrCGroupEventChanMissing
return
}
m.cgroupEventsChan = ch
ret = m
return
}
}
func WithLogger(log *zap.SugaredLogger) Opt {
return func(m *RouteManager) (ret *RouteManager, err error) {
m.log = log
ret = m
return
}
}