mirror of
https://gitea.com/gitea/runner.git
synced 2026-11-08 08:10:30 +00:00
8e999cd039
The cache address was detected once at startup, and the interface fallback ranked ethernet names above IPv4. A runner that started before DHCPv4 finished could advertise a global IPv6 address to IPv4-only job networks until it restarted, failing every artifact and cache call. IPv4 now ranks first, and the address is detected again for each job unless `cache.host` sets it. Detecting an IPv6 address logs a warning. Fixes: https://gitea.com/gitea/runner/issues/1379 Co-authored-by: silverwind <[email protected]> Co-authored-by: silverwind <[email protected]> Reviewed-on: https://gitea.com/gitea/runner/pulls/1398 Reviewed-by: silverwind <[email protected]> Co-authored-by: bircni <[email protected]>
88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// Copyright 2021 The nektos/act Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package common
|
|
|
|
import (
|
|
"net"
|
|
"slices"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
type interfaceIP struct {
|
|
net.IP
|
|
Name string
|
|
}
|
|
|
|
// GetOutboundIP returns an outbound IP address of this machine.
|
|
// It tries to access the internet and returns the local IP address of the connection.
|
|
// If the machine cannot access the internet, it returns a preferred IP address from network interfaces.
|
|
// It returns nil if no IP address is found.
|
|
func GetOutboundIP() net.IP {
|
|
// See https://stackoverflow.com/a/37382208
|
|
conn, err := net.Dial("udp", "8.8.8.8:80")
|
|
if err == nil {
|
|
defer conn.Close()
|
|
if addr, ok := conn.LocalAddr().(*net.UDPAddr); ok {
|
|
return addr.IP
|
|
}
|
|
}
|
|
|
|
// So the machine cannot access the internet. Pick an IP address from network interfaces.
|
|
if ifs, err := net.Interfaces(); err == nil {
|
|
var ips []interfaceIP
|
|
for _, i := range ifs {
|
|
if addrs, err := i.Addrs(); err == nil {
|
|
for _, addr := range addrs {
|
|
var ip net.IP
|
|
switch v := addr.(type) {
|
|
case *net.IPNet:
|
|
ip = v.IP
|
|
case *net.IPAddr:
|
|
ip = v.IP
|
|
}
|
|
if ip.IsGlobalUnicast() {
|
|
ips = append(ips, interfaceIP{ip, i.Name})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return preferredIP(ips)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func preferredIP(ips []interfaceIP) net.IP {
|
|
ips = slices.DeleteFunc(ips, func(ip interfaceIP) bool {
|
|
return len(ip.Name) == 15 && strings.HasPrefix(ip.Name, "br-") && strings.Trim(ip.Name[3:], "0123456789abcdef") == "" // a Docker network's bridge, removed with the network
|
|
})
|
|
if len(ips) == 0 {
|
|
return nil
|
|
}
|
|
sort.Slice(ips, func(i, j int) bool {
|
|
first, second := ips[i], ips[j]
|
|
|
|
// IPv4 is preferred, as job networks are IPv4-only by default
|
|
if vi, vj := first.To4() != nil, second.To4() != nil; vi != vj {
|
|
return vi
|
|
}
|
|
|
|
// ethernet is preferred
|
|
if vi, vj := strings.HasPrefix(first.Name, "e"), strings.HasPrefix(second.Name, "e"); vi != vj {
|
|
return vi
|
|
}
|
|
|
|
// en0 is preferred to en1
|
|
if first.Name != second.Name {
|
|
return first.Name < second.Name
|
|
}
|
|
|
|
// fallback
|
|
return first.String() < second.String()
|
|
})
|
|
return ips[0].IP
|
|
}
|