From e080eac204aa77c3cdc55d3b4cfa45c26bc8a635 Mon Sep 17 00:00:00 2001
From: Sergey Krashevich <svk@svk.su>
Date: Tue, 30 Apr 2024 01:49:01 +0300
Subject: [PATCH] refactor(mdns): consolidate platform-specific syscall files

- Rename `syscall_linux.go` to `syscall.go` with build constraints for non-BSD and non-Windows platforms.
- Merge `syscall_darwin.go` into `syscall_bsd.go` and adjust build constraints for BSD platforms (Darwin, FreeBSD, OpenBSD).
- Remove redundant `syscall_freebsd.go`.
- Add build constraints to `syscall_windows.go` for Windows platform.
---
 pkg/mdns/{syscall_linux.go => syscall.go}     |  2 ++
 .../{syscall_darwin.go => syscall_bsd.go}     |  2 ++
 pkg/mdns/syscall_freebsd.go                   | 24 -------------------
 pkg/mdns/syscall_windows.go                   |  2 ++
 4 files changed, 6 insertions(+), 24 deletions(-)
 rename pkg/mdns/{syscall_linux.go => syscall.go} (78%)
 rename pkg/mdns/{syscall_darwin.go => syscall_bsd.go} (90%)
 delete mode 100644 pkg/mdns/syscall_freebsd.go

diff --git a/pkg/mdns/syscall_linux.go b/pkg/mdns/syscall.go
similarity index 78%
rename from pkg/mdns/syscall_linux.go
rename to pkg/mdns/syscall.go
index fc0caeb0..0e50535a 100644
--- a/pkg/mdns/syscall_linux.go
+++ b/pkg/mdns/syscall.go
@@ -1,3 +1,5 @@
+//go:build !(darwin || ios || freebsd || openbsd || netbsd || dragonfly || windows)
+
 package mdns
 
 import (
diff --git a/pkg/mdns/syscall_darwin.go b/pkg/mdns/syscall_bsd.go
similarity index 90%
rename from pkg/mdns/syscall_darwin.go
rename to pkg/mdns/syscall_bsd.go
index c1f1225b..6ebb0c93 100644
--- a/pkg/mdns/syscall_darwin.go
+++ b/pkg/mdns/syscall_bsd.go
@@ -1,3 +1,5 @@
+//go:build darwin || ios || freebsd || openbsd || netbsd || dragonfly
+
 package mdns
 
 import (
diff --git a/pkg/mdns/syscall_freebsd.go b/pkg/mdns/syscall_freebsd.go
deleted file mode 100644
index c1f1225b..00000000
--- a/pkg/mdns/syscall_freebsd.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package mdns
-
-import (
-	"syscall"
-)
-
-func SetsockoptInt(fd uintptr, level, opt int, value int) (err error) {
-	// change SO_REUSEADDR and REUSEPORT flags simultaneously for BSD-like OS
-	// https://github.com/AlexxIT/go2rtc/issues/626
-	// https://stackoverflow.com/questions/14388706/how-do-so-reuseaddr-and-so-reuseport-differ/14388707
-	if opt == syscall.SO_REUSEADDR {
-		if err = syscall.SetsockoptInt(int(fd), level, opt, value); err != nil {
-			return
-		}
-
-		opt = syscall.SO_REUSEPORT
-	}
-
-	return syscall.SetsockoptInt(int(fd), level, opt, value)
-}
-
-func SetsockoptIPMreq(fd uintptr, level, opt int, mreq *syscall.IPMreq) (err error) {
-	return syscall.SetsockoptIPMreq(int(fd), level, opt, mreq)
-}
diff --git a/pkg/mdns/syscall_windows.go b/pkg/mdns/syscall_windows.go
index be283655..770510cf 100644
--- a/pkg/mdns/syscall_windows.go
+++ b/pkg/mdns/syscall_windows.go
@@ -1,3 +1,5 @@
+//go:build windows
+
 package mdns
 
 import "syscall"