mirror of
https://github.com/openziti/ziti.git
synced 2026-10-22 11:46:01 +00:00
Paul Lorenz
55 lines
1.5 KiB
Go
55 lines
1.5 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/michaelquigley/pfxlog"
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"github.com/netfoundry/ziti-edge/tunnel/dns"
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"github.com/netfoundry/ziti-edge/tunnel/utils"
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"net"
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)
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func getInterceptIP(hostname string, resolver dns.Resolver) (net.IP, error) {
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log := pfxlog.Logger()
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// hostname is an ip address, return it
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parsedIP := net.ParseIP(hostname)
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if parsedIP != nil {
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return parsedIP, nil
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}
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// - apparently not an IP address, assume hostname and attempt lookup:
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// - use first result if any
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// - pin first IP to hostname in /etc/hosts
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addrs, err := net.LookupIP(hostname)
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if err == nil {
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if len(addrs) > 0 {
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resolver.AddHostname(hostname, addrs[0].To4())
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return addrs[0], nil
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}
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} else {
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log.Debugf("net.LookupIp(%s) failed: %s", hostname, err)
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}
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ip, err := utils.NextIP(net.IP{169, 254, 1, 1}, net.IP{169, 254, 254, 254})
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if ip == nil {
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return nil, fmt.Errorf("invalid IP address or unresolvable hostname: %s", hostname)
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}
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resolver.AddHostname(hostname, ip)
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return ip, nil
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}
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