mirror of
https://github.com/strukturag/nextcloud-spreed-signaling
synced 2026-03-14 14:35:44 +01:00
135 lines
2.8 KiB
Go
135 lines
2.8 KiB
Go
/**
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* Standalone signaling server for the Nextcloud Spreed app.
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* Copyright (C) 2023 struktur AG
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*
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* @author Joachim Bauch <bauch@struktur.de>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package container
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import (
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"bytes"
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"fmt"
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"net"
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"slices"
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"strings"
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"github.com/strukturag/nextcloud-spreed-signaling/internal"
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)
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type IPList struct {
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ips []*net.IPNet
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}
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func (a *IPList) String() string {
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var b bytes.Buffer
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b.WriteString("[")
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for idx, n := range a.ips {
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if idx > 0 {
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b.WriteString(", ")
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}
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b.WriteString(n.String())
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}
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b.WriteString("]")
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return b.String()
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}
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func (a *IPList) Empty() bool {
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return len(a.ips) == 0
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}
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func (a *IPList) Contains(ip net.IP) bool {
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return slices.ContainsFunc(a.ips, func(n *net.IPNet) bool {
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return n.Contains(ip)
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})
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}
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func parseIPNet(s string) (*net.IPNet, error) {
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var ipnet *net.IPNet
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if strings.ContainsRune(s, '/') {
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var err error
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if _, ipnet, err = net.ParseCIDR(s); err != nil {
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return nil, fmt.Errorf("invalid IP address/subnet %s: %w", s, err)
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}
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} else {
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ip := net.ParseIP(s)
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if ip == nil {
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return nil, fmt.Errorf("invalid IP address %s", s)
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}
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ipnet = &net.IPNet{
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IP: ip,
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Mask: net.CIDRMask(len(ip)*8, len(ip)*8),
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}
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}
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return ipnet, nil
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}
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func ParseIPList(allowed string) (*IPList, error) {
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var allowedIps []*net.IPNet
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for ip := range internal.SplitEntries(allowed, ",") {
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i, err := parseIPNet(ip)
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if err != nil {
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return nil, err
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}
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allowedIps = append(allowedIps, i)
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}
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result := &IPList{
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ips: allowedIps,
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}
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return result, nil
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}
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func DefaultAllowedIPs() *IPList {
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allowedIps := []*net.IPNet{
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{
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IP: net.ParseIP("127.0.0.1"),
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Mask: net.CIDRMask(32, 32),
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},
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{
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IP: net.ParseIP("::1"),
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Mask: net.CIDRMask(128, 128),
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},
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}
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result := &IPList{
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ips: allowedIps,
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}
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return result
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}
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var (
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privateIpNets = []string{
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// Loopback addresses.
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"127.0.0.0/8",
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"::1",
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// Private addresses.
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"10.0.0.0/8",
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"172.16.0.0/12",
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"192.168.0.0/16",
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}
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)
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func DefaultPrivateIPs() *IPList {
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allowed, err := ParseIPList(strings.Join(privateIpNets, ","))
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if err != nil {
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panic(fmt.Errorf("could not parse private ips %+v: %w", privateIpNets, err))
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}
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return allowed
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}
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