From d6a3d8ad9903af0c65e0024b81694eaa583e6ee9 Mon Sep 17 00:00:00 2001
From: Gary Talent <gtalent2@gmail.com>
Date: Wed, 2 Mar 2016 06:08:29 +0000
Subject: [PATCH] Filled out FreeBSD port forwarding control.

---
 net_freebsd.go | 14 +++++++++++++-
 net_linux.go   |  2 +-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/net_freebsd.go b/net_freebsd.go
index df0038c..72e1266 100644
--- a/net_freebsd.go
+++ b/net_freebsd.go
@@ -14,7 +14,19 @@ import (
 	"strconv"
 )
 
-func setupPortForward(ip, port string) {
+func setupPortForward(ruleName, ip, port string) {
+	pfrule := "\"rdr pass on $ext_if proto { tcp, udp } from any to any port {" + port + "} -> " + ip + "\""
+
+	in, err := exec.Command("pfctl", "-a", "\""+ruleName+"\"", "-f", "-").StdinPipe()
+	defer in.Close()
+	if err != nil {
+		log.Println("Port Forwarding:", err)
+	}
+
+	_, err = in.Write([]byte(pfrule))
+	if err != nil {
+		log.Println("Port Forwarding:", err)
+	}
 }
 
 func portUsageCount(ports ...int) int {
diff --git a/net_linux.go b/net_linux.go
index eed00cf..e1f3efa 100644
--- a/net_linux.go
+++ b/net_linux.go
@@ -15,7 +15,7 @@ import (
 )
 
 // just have this stub to allow building on Linux
-func setupPortForward(ip, port string) {
+func setupPortForward(ruleName, ip, port string) {
 	log.Print("Port forwarding not currently implemented for Linux/iptables")
 }