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listener_wrapper.go
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/
listener_wrapper.go
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package sower
import (
"net"
"net/netip"
"github.com/caddyserver/caddy/v2"
"go.uber.org/zap"
)
func init() {
caddy.RegisterModule(ListenerWrapper{})
}
// ListenerWrapper is ...
type ListenerWrapper struct {
ExcludeDomain []string `json:"exclude_domains,omitempty"`
AllowedIPs []string `json:"allowed_ips,omitempty"`
allowedIPs AddressRange
lg *zap.Logger
}
func (ListenerWrapper) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "caddy.listeners.sower",
New: func() caddy.Module { return new(ListenerWrapper) },
}
}
func (lw *ListenerWrapper) Provision(ctx caddy.Context) error {
lw.lg = ctx.Logger(lw)
lw.allowedIPs = make([]netip.Prefix, len(lw.AllowedIPs))
for k, v := range lw.AllowedIPs {
p, err := netip.ParsePrefix(v)
if err != nil {
return err
}
lw.allowedIPs[k] = p
}
return nil
}
func (lw *ListenerWrapper) WrapListener(l net.Listener) net.Listener {
ln := &Listener{
dl: lw.ExcludeDomain,
ar: lw.allowedIPs,
lg: lw.lg,
ln: l,
connCh: make(chan Result),
}
go ln.loop()
return ln
}
var _ caddy.ListenerWrapper = (*ListenerWrapper)(nil)