25 lines
514 B
Bash
25 lines
514 B
Bash
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Helper functions
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wait_local_port_listen()
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{
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local listener_ns="${1}"
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local port="${2}"
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local protocol="${3}"
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local pattern
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local i
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pattern=":$(printf "%04X" "${port}") "
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# for tcp protocol additionally check the socket state
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[ ${protocol} = "tcp" ] && pattern="${pattern}0A"
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for i in $(seq 10); do
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if ip netns exec "${listener_ns}" awk '{print $2" "$4}' \
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/proc/net/"${protocol}"* | grep -q "${pattern}"; then
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break
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fi
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sleep 0.1
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done
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}
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