add srv and txt record support

Author: zhcode-fun

README.md

@@ -1,3 +1,22 @@
+## Endpoint 添加srv记录和txt记录支持
+
+下载：[Release](https://github.com/zhcode-fun/wireguard-windows/releases)
+
++ srv记录：设置端口号为0，例如
+```
+Endpoint = srv.wg.xxxx.com:0
+```
+
++ txt记录：设置端口号为1，例如
+text记录值可以是纯`ip:port`，也可以在后面添加其他备注，以`||`分割，如`1.1.1.1:6789 || 更新于2024-09-12 20:30:00`
+```
+Endpoint = txt.wg.xxxx.com:1
+```
+
+> 不会golang，一边查语法一边写的，代码太烂，好在改的不多🤣
+
+**************************************分割线，下面是官方README******************************
+
 # [WireGuard](https://www.wireguard.com/) for Windows
 
 This is a fully-featured WireGuard client for Windows that uses [WireGuardNT](https://git.zx2c4.com/wireguard-nt/about/). It is the only official and recommended way of using WireGuard on Windows.

build.bat

@@ -41,9 +41,9 @@ if exist .deps\prepared goto :render
 		echo [+] Regenerating files
 		go generate ./... || exit /b 1
 	)
-	call :build_plat x86 i686 386 || goto :error
+	@REM call :build_plat x86 i686 386 || goto :error
 	call :build_plat amd64 x86_64 amd64 || goto :error
-	call :build_plat arm64 aarch64 arm64 || goto :error
+	@REM call :build_plat arm64 aarch64 arm64 || goto :error
 
 :sign
 	if exist .\sign.bat call .\sign.bat
@@ -73,7 +73,7 @@ if exist .deps\prepared goto :render
 	echo [+] Assembling resources %1
 	%~2-w64-mingw32-windres -I ".deps\wireguard-nt\bin\%~1" -DWIREGUARD_VERSION_ARRAY=%WIREGUARD_VERSION_ARRAY% -DWIREGUARD_VERSION_STR=%WIREGUARD_VERSION% -i resources.rc -o "resources_%~3.syso" -O coff -c 65001 || exit /b %errorlevel%
 	echo [+] Building program %1
-	go build -tags load_wgnt_from_rsrc -ldflags="-H windowsgui -s -w" -trimpath -buildinfo=false -buildvcs=false -v -o "%~1\wireguard.exe" || exit /b 1
+	go build -tags load_wgnt_from_rsrc -ldflags="-H windowsgui -s -w" -trimpath -buildvcs=false -v -o "%~1\wireguard.exe" || exit /b 1
 	if not exist "%~1\wg.exe" (
 		echo [+] Building command line tools %1
 		del .deps\src\*.exe .deps\src\*.o .deps\src\wincompat\*.o .deps\src\wincompat\*.lib 2> NUL

conf/dnsresolver_windows.go

@@ -7,7 +7,9 @@ package conf
 
 import (
 	"log"
+	"net"
 	"net/netip"
+	"strings"
 	"time"
 	"unsafe"
 
@@ -85,13 +87,74 @@ func resolveHostnameOnce(name string) (resolvedIPString string, err error) {
 	return
 }
 
+func resolveSrvRecord(name string) (resolvedIPString string, resolvedPort uint16, err error) {
+	maxTries := 10
+	if services.StartedAtBoot() {
+		maxTries *= 4
+	}
+	var resolvedTargetString string
+	resolvedTargetString, resolvedPort, err = resolveSrvRecordOnce(name)
+	if err != nil {
+		return
+	}
+	resolvedIPString, err = resolveHostname(resolvedTargetString)
+	return resolvedIPString, resolvedPort, err
+}
+
+func resolveSrvRecordOnce(name string) (resolvedTargetString string, resolvedPort uint16, err error) {
+	_, records, err := net.LookupSRV("", "", name)
+	if err != nil {
+		return
+	}
+	if len(records) > 0 {
+		resolvedTargetString = records[0].Target
+		resolvedPort = records[0].Port
+	}
+	return
+}
+
+func resolveTxtRecordOnce(name string) (resolvedTargetString string, resolvedPort uint16, err error) {
+	records, err := net.LookupTXT(name)
+	if err != nil {
+		return
+	}
+	if len(records) > 0 {
+		targetString := records[0]
+		if strings.Contains(records[0], "||") {
+			resolvedTargetStrings := strings.Split(records[0], "||")
+			targetString = resolvedTargetStrings[0]
+		}
+		i := strings.LastIndexByte(targetString, ':')
+		if i >= 0 {
+			targetString = strings.TrimSpace(targetString)
+			var resolvedPortStr string
+			resolvedTargetString, resolvedPortStr = targetString[:i], targetString[i+1:]
+			resolvedPort, err = parsePort(resolvedPortStr)
+			if err != nil {
+				return
+			}
+		}
+	}
+	return
+}
+
 func (config *Config) ResolveEndpoints() error {
 	for i := range config.Peers {
 		if config.Peers[i].Endpoint.IsEmpty() {
 			continue
 		}
 		var err error
-		config.Peers[i].Endpoint.Host, err = resolveHostname(config.Peers[i].Endpoint.Host)
+		if config.Peers[i].Endpoint.Port == 0 {
+			// srv记录
+			log.Printf("SRV record start resolve...")
+			config.Peers[i].Endpoint.Host, config.Peers[i].Endpoint.Port, err = resolveSrvRecord(config.Peers[i].Endpoint.Host)
+		} else if config.Peers[i].Endpoint.Port == 1 {
+			// txt记录
+			log.Printf("TXT record start resolve...")
+			config.Peers[i].Endpoint.Host, config.Peers[i].Endpoint.Port, err = resolveTxtRecordOnce(config.Peers[i].Endpoint.Host)
+		} else {
+			config.Peers[i].Endpoint.Host, err = resolveHostname(config.Peers[i].Endpoint.Host)
+		}
 		if err != nil {
 			return err
 		}

version/version.go

@@ -6,5 +6,5 @@
 package version
 
 const (
-	Number = "0.5.3"
+	Number = "0.5.3.1"
 )