Fix connection monitoring on Windows

Linux requires su for `ip4:icmp` pings. Windows does not support `udp4`
pings.

Signed-off-by: Simon Rozman <simon@rozman.si>

1 files changed, 21 insertions, 0 deletions

diff --git a/internal/failover/ping_default.go b/internal/failover/ping_default.go
new file mode 100644
index 0000000..961c6db
--- /dev/null
+++ b/internal/failover/ping_default.go
@@ -0,0 +1,21 @@
+//go:build !windows
+
+package failover
+
+import (
+	"net"
+
+	"github.com/go-errors/errors"
+	"golang.org/x/net/icmp"
+)
+
+func NewPinger(gateway string, size int) (*Pinger, error) {
+	l, err := icmp.ListenPacket("udp4", "0.0.0.0")
+	if err != nil {
+		return nil, errors.WrapPrefix(err, "failed creating ping", 0)
+	}
+	return &Pinger{
+		listener: l,
+		buffer:   make([]byte, size-mtuOverhead),
+		gateway:  &net.UDPAddr{IP: net.ParseIP(gateway)}}, nil
+}