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1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Helper functions
5
6wait_local_port_listen()
7{
8 local listener_ns="${1}"
9 local port="${2}"
10 local protocol="${3}"
11 local pattern
12 local i
13
14 pattern=":$(printf "%04X" "${port}") "
15
16 # for tcp protocol additionally check the socket state
17 [ ${protocol} = "tcp" ] && pattern="${pattern}0A"
18 for i in $(seq 10); do
19 if ip netns exec "${listener_ns}" awk '{print $2" "$4}' \
20 /proc/net/"${protocol}"* | grep -q "${pattern}"; then
21 break
22 fi
23 sleep 0.1
24 done
25}