Remove dependency on comshim

Author: nekohasekai

go.mod

@@ -8,7 +8,6 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20240315080113-799fb6b6d311
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97
 	github.com/sagernet/sing v0.3.6
-	github.com/scjalliance/comshim v0.0.0-20230315213746-5e51f40bd3b9
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/net v0.22.0
 	golang.org/x/sys v0.18.0

go.sum

@@ -12,8 +12,6 @@ github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 h1:iL5gZI3uFp0X6E
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
 github.com/sagernet/sing v0.3.6 h1:dsEdYLKBQlrxUfw1a92x0VdPvR1/BOxQ+HIMyaoEJsQ=
 github.com/sagernet/sing v0.3.6/go.mod h1:+60H3Cm91RnL9dpVGWDPHt0zTQImO9Vfqt9a4rSambI=
-github.com/scjalliance/comshim v0.0.0-20230315213746-5e51f40bd3b9 h1:rc/CcqLH3lh8n+csdOuDfP+NuykE0U6AeYSJJHKDgSg=
-github.com/scjalliance/comshim v0.0.0-20230315213746-5e51f40bd3b9/go.mod h1:a/83NAfUXvEuLpmxDssAXxgUgrEy12MId3Wd7OTs76s=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 h1:gga7acRE695APm9hlsSMoOoE65U4/TcqNj90mc69Rlg=
 github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=

internal/winfw/winfw.go

@@ -12,7 +12,6 @@ import (
 
 	"github.com/go-ole/go-ole"
 	"github.com/go-ole/go-ole/oleutil"
-	"github.com/scjalliance/comshim"
 )
 
 // Firewall related API constants.
@@ -250,7 +249,10 @@ func FirewallRuleExistsByName(rules *ole.IDispatch, name string) (bool, error) {
 // then:
 // dispatch firewallAPIRelease(u, fwp)
 func firewallAPIInit() (*ole.IUnknown, *ole.IDispatch, error) {
-	comshim.Add(1)
+	err := ole.CoInitializeEx(0, ole.COINIT_MULTITHREADED)
+	if err != nil {
+		return nil, nil, fmt.Errorf("Failed to initialize COM: %s", err)
+	}
 
 	unknown, err := oleutil.CreateObject("HNetCfg.FwPolicy2")
 	if err != nil {
@@ -270,5 +272,5 @@ func firewallAPIInit() (*ole.IUnknown, *ole.IDispatch, error) {
 func firewallAPIRelease(u *ole.IUnknown, fwp *ole.IDispatch) {
 	fwp.Release()
 	u.Release()
-	comshim.Done()
+	ole.CoUninitialize()
 }