mirror of
https://github.com/openziti/ziti.git
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Eugene K
105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
/*
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Copyright NetFoundry, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package intercept
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import (
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"fmt"
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"github.com/openziti/edge/tunnel"
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"github.com/openziti/edge/tunnel/dns"
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"github.com/openziti/edge/tunnel/entities"
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"github.com/pkg/errors"
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"net"
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)
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type Protocol int
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const (
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TCP Protocol = 2
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UDP Protocol = 17
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)
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type Interceptor interface {
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Start(provider tunnel.FabricProvider)
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Stop()
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Intercept(service *entities.Service, resolver dns.Resolver, tracker AddressTracker) error
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StopIntercepting(serviceName string, tracker AddressTracker) error
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}
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// Interceptors need to maintain state for services that are being intercepted.
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// Intercepted services need to be looked up by:
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// - intercepted address - this is all an interceptor knows when an inbound connection is made
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// - service name - when a service is removed (e.g. from an appwan)
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type InterceptAddress struct {
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cidr *net.IPNet
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lowPort uint16
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highPort uint16
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protocol string
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TproxySpec []string
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AcceptSpec []string
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}
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func (addr *InterceptAddress) Proto() string {
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return addr.protocol
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}
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func (addr *InterceptAddress) IpNet() *net.IPNet {
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return addr.cidr
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}
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func (addr *InterceptAddress) LowPort() uint16 {
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return addr.lowPort
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}
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func (addr *InterceptAddress) HighPort() uint16 {
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return addr.highPort
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}
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func (addr *InterceptAddress) Contains(ip net.IP, port uint16) bool {
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return addr.cidr.Contains(ip) && port >= addr.lowPort && port <= addr.highPort
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}
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func (addr *InterceptAddress) String() string {
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return fmt.Sprintf("cidr: %v, cidrAddr: %p, lowPort: %v, highPort: %v, protocol: %v, tproxySpec: %v, acceptSpec: %v",
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addr.cidr, addr.cidr, addr.lowPort, addr.highPort, addr.protocol, addr.TproxySpec, addr.AcceptSpec)
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}
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type InterceptAddrCB interface {
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Apply(*InterceptAddress)
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}
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func GetInterceptAddresses(service *entities.Service, protocols []string, resolver dns.Resolver, addressCB InterceptAddrCB) error {
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for _, addr := range service.InterceptV1Config.Addresses {
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err := getInterceptIP(service, addr, resolver, func(ip net.IP, ipNet *net.IPNet) {
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for _, protocol := range protocols {
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for _, portRange := range service.InterceptV1Config.PortRanges {
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addr := &InterceptAddress{
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cidr: ipNet,
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lowPort: portRange.Low,
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highPort: portRange.High,
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protocol: protocol}
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addressCB.Apply(addr)
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}
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}
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})
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if err != nil {
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return errors.Wrapf(err, "failed to get intercept IP address for %v", addr)
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}
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}
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return nil
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}
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