/
utils.go
104 lines (94 loc) · 2.28 KB
/
utils.go
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/*
* Copyright (C) 2020-2022, IrineSistiana
*
* This file is part of mosdns.
*
* mosdns is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* mosdns is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package upstream
import (
"fmt"
"net"
"net/netip"
"strconv"
)
type socketOpts struct {
so_mark int
bind_to_device string
}
func parseDialAddr(urlHost, dialAddr string, defaultPort uint16) (string, uint16, error) {
addr := urlHost
if len(dialAddr) > 0 {
addr = dialAddr
}
host, port, err := trySplitHostPort(addr)
if err != nil {
return "", 0, err
}
if port == 0 {
port = defaultPort
}
return host, port, nil
}
func joinPort(host string, port uint16) string {
return net.JoinHostPort(host, strconv.Itoa(int(port)))
}
func tryRemovePort(s string) string {
host, _, err := net.SplitHostPort(s)
if err != nil {
return s
}
return host
}
// trySplitHostPort splits host and port.
// If s has no port, it returns s,0,nil
func trySplitHostPort(s string) (string, uint16, error) {
var port uint16
host, portS, err := net.SplitHostPort(s)
if err == nil {
n, err := strconv.ParseUint(portS, 10, 16)
if err != nil {
return "", 0, fmt.Errorf("invalid port, %w", err)
}
port = uint16(n)
return host, port, nil
}
return s, 0, nil
}
func parseBootstrapAp(s string) (netip.AddrPort, error) {
host, port, err := trySplitHostPort(s)
if err != nil {
return netip.AddrPort{}, err
}
if port == 0 {
port = 53
}
addr, err := netip.ParseAddr(host)
if err != nil {
return netip.AddrPort{}, err
}
return netip.AddrPortFrom(addr, port), nil
}
func tryTrimIpv6Brackets(s string) string {
if len(s) < 2 {
return s
}
if s[0] == '[' && s[len(s)-1] == ']' {
return s[1 : len(s)-2]
}
return s
}
func msgTruncated(b []byte) bool {
return b[2]&(1<<1) != 0
}