From 57d01ddcaa7e929f6c43ef2678afdbb10ec1f67b Mon Sep 17 00:00:00 2001
From: Jarrod Johnson <jjohnson2@lenovo.com>
Date: Mon, 28 Nov 2022 15:17:59 -0500
Subject: [PATCH] Base all web forwarding from 3901

This makes the web forwarding more predictable for
firewall rules
---
 confluent_server/confluent/forwarder.py | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/confluent_server/confluent/forwarder.py b/confluent_server/confluent/forwarder.py
index 5b7d5ee8..04ae8396 100644
--- a/confluent_server/confluent/forwarder.py
+++ b/confluent_server/confluent/forwarder.py
@@ -112,8 +112,17 @@ def get_port(addr, clientip, sessionid):
     if sessionid not in forwardersbyclient:
         forwardersbyclient[sessionid] = {}
     if addr not in forwardersbyclient[sessionid]:
-        newsock = eventlet.listen(('::', 0, 0, 0),
-                  family=socket.AF_INET6)
+        newsock = socket.socket(socket.AF_INET6)
+        newport = 3901
+        while newport:
+            try:
+                newsock.bind(('::', newport, 0, 0))
+                newsock.listen(50)
+                break
+            except OSError as e:
+                if e.errno == 98:
+                    newport += 1
+                    continue
         forwardersbyclient[sessionid][addr] = newsock
         sockhandler[newsock] = eventlet.spawn(forward_port, newsock, addr,
                                               clientip, sessionid)