From 2c5d8376cdfd25d7510c85b3896b506715f96590 Mon Sep 17 00:00:00 2001
From: Julius Goryavsky <julius.goryavsky@mariadb.com>
Date: Wed, 7 Aug 2024 16:40:35 +0200
Subject: [PATCH] MDEV-30686: Endless loop when trying to establish connection

With wsrep_sst_rsync, node goes into endless loop when trying
to establish connection to donor for IST/SST if the database
is bind on specific IP address, not the "*".

This commit fixes this problem. Separate tests are not
required - the problem can occur in normal configurations
on a number of systems when selecting a bing address other
than "*", especially on FreeBSD and with the IPv6 addresses.
---
 scripts/wsrep_sst_rsync.sh | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/scripts/wsrep_sst_rsync.sh b/scripts/wsrep_sst_rsync.sh
index e386930c5b7..b05f4bc2efd 100644
--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
@@ -100,10 +100,9 @@ check_pid_and_port()
         local busy=0
 
         if [ $lsof_available -ne 0 ]; then
-            port_info=$(lsof -Pnl -i ":$port" 2>/dev/null | \
-                        grep -F '(LISTEN)')
+            port_info=$(lsof -Pnl -i ":$port" 2>/dev/null | grep -F '(LISTEN)')
             echo "$port_info" | \
-            grep -q -E "[[:space:]](\\*|\\[?::\\]?):$port[[:space:]]" && busy=1
+            grep -q -E "[[:space:]]\\[?(\\*|[[:xdigit:]]*(:[[:xdigit:]]*)+)(\\](%[^:]+)?)?:$port[[:space:]]" && busy=1
         else
             local filter='([^[:space:]]+[[:space:]]+){4}[^[:space:]]+'
             if [ $sockstat_available -ne 0 ]; then
@@ -122,7 +121,7 @@ check_pid_and_port()
                     grep -F 'users:(' | grep -o -E "$filter")
             fi
             echo "$port_info" | \
-            grep -q -E "[[:space:]](\\*|\\[?::\\]?):$port\$" && busy=1
+            grep -q -E "[[:space:]]\\[?(\\*|[[:xdigit:]]*(:[[:xdigit:]]*)+)(\\](%[^:]+)?)?:$port\$" && busy=1
         fi
 
         if [ $busy -eq 0 ]; then