chore(dev): add task to devrun run

.vscode/tasks.json

@@ -24,6 +24,15 @@
                 "${input:githubRemoteUsername}",
                 "git@github.com:${input:githubRemoteUsername}/gluetun.git"
             ],
+        },
+        {
+            "label": "Devrun",
+            "type": "shell",
+            "command": "go run ./cmd/main.go run ${input:devrunProvider} ${input:devrunVPNProtocol} ${input:devrunExtraFlags}",
+            "options": {
+                "cwd": "${workspaceFolder}/devrun"
+            },
+            "problemMatcher": []
         }
     ],
     "inputs": [
@@ -47,5 +56,26 @@
             "type": "promptString",
             "description": "Please enter a Github username",
         },
+        {
+            "id": "devrunProvider",
+            "type": "promptString",
+            "description": "Please enter a single provider",
+        },
+        {
+            "id": "devrunVPNProtocol",
+            "type": "pickString",
+            "description": "VPN protocol to use",
+            "options": [
+                "wireguard",
+                "openvpn"
+            ],
+            "default": "wireguard"
+        },
+        {
+            "id": "devrunExtraFlags",
+            "type": "promptString",
+            "description": "Extra flags (optional)",
+            "default": ""
+        },
     ]
 }

internal/pmtud/ip/source.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"net/netip"
-	"syscall"
+	"strings"
 
 	"github.com/jsimonetti/rtnetlink"
 	"github.com/qdm12/gluetun/internal/pmtud/constants"
@@ -54,8 +54,7 @@ func srcIP(dst netip.Addr) (netip.Addr, error) {
 	}
 	messages, err := conn.Route.Get(requestMessage)
 	if err != nil {
-		var sysErr syscall.Errno
+		if strings.Contains(err.Error(), "network is unreachable") {
-		if errors.As(err, &sysErr) && sysErr == syscall.ENETUNREACH {
 			err = ErrNetworkUnreachable
 		}
 		return netip.Addr{}, fmt.Errorf("getting routes to %s: %w", dst, err)