105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
/*
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* Copyright (C) 2020-2022, IrineSistiana
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*
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* This file is part of mosdns.
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*
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* mosdns is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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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* mosdns 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package upstream
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import (
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"fmt"
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"net"
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"net/netip"
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"strconv"
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)
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type socketOpts struct {
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so_mark int
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bind_to_device string
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}
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func parseDialAddr(urlHost, dialAddr string, defaultPort uint16) (string, uint16, error) {
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addr := urlHost
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if len(dialAddr) > 0 {
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addr = dialAddr
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}
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host, port, err := trySplitHostPort(addr)
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if err != nil {
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return "", 0, err
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}
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if port == 0 {
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port = defaultPort
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}
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return host, port, nil
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}
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func joinPort(host string, port uint16) string {
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return net.JoinHostPort(host, strconv.Itoa(int(port)))
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}
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func tryRemovePort(s string) string {
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host, _, err := net.SplitHostPort(s)
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if err != nil {
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return s
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}
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return host
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}
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// trySplitHostPort splits host and port.
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// If s has no port, it returns s,0,nil
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func trySplitHostPort(s string) (string, uint16, error) {
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var port uint16
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host, portS, err := net.SplitHostPort(s)
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if err == nil {
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n, err := strconv.ParseUint(portS, 10, 16)
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if err != nil {
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return "", 0, fmt.Errorf("invalid port, %w", err)
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}
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port = uint16(n)
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return host, port, nil
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}
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return s, 0, nil
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}
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func parseBootstrapAp(s string) (netip.AddrPort, error) {
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host, port, err := trySplitHostPort(s)
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if err != nil {
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return netip.AddrPort{}, err
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}
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if port == 0 {
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port = 53
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}
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addr, err := netip.ParseAddr(host)
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if err != nil {
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return netip.AddrPort{}, err
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}
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return netip.AddrPortFrom(addr, port), nil
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}
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func tryTrimIpv6Brackets(s string) string {
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if len(s) < 2 {
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return s
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}
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if s[0] == '[' && s[len(s)-1] == ']' {
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return s[1 : len(s)-2]
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}
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return s
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}
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func msgTruncated(b []byte) bool {
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return b[2]&(1<<1) != 0
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}
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