From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonatan Schlag To: network@lists.ipfire.org Subject: [PATCH 2/3] Add new function ip_get__assigned_addresses_from_net() Date: Fri, 23 Feb 2018 11:05:34 +0000 Message-ID: <1519383935-3556-2-git-send-email-jonatan.schlag@ipfire.org> In-Reply-To: <1519383935-3556-1-git-send-email-jonatan.schlag@ipfire.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7121744208943944711==" List-Id: --===============7121744208943944711== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit This function is neede by IPsec to set the routes correctly. We can now now find a source IP for a given net. This way is ugly because the source IP is unpredictable if we get multiple IPs. Signed-off-by: Jonatan Schlag --- src/functions/functions.ip | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/src/functions/functions.ip b/src/functions/functions.ip index 3b43da7..ef40bcc 100644 --- a/src/functions/functions.ip +++ b/src/functions/functions.ip @@ -205,3 +205,28 @@ ip_address_del() { return ${EXIT_OK} } + +# Get all currently assigned addresse for a given network +ip_get_assigned_addresses_from_net() { + local net=${1} + shift + local args="$@" + + assert ip_net_is_valid ${net} + + local line + local ips + + # We read the output of $(ip addr show to ${net} ${args}) + while read -r line; do + # We are only interested in lines which start with inet or inet6 + [[ "${line}" =~ ^(inet6 |inet ) ]] || continue + + # We need the second word the line + line=(${line}) + list_append "ips" "$(ip_split_prefix "${line[1]}")" + done <<< "$(ip addr show to "${net}" ${args})" + + # We sort the list to get the lowest IP as first item + print "$(list_sort ${ips})" +} -- 2.6.3 --===============7121744208943944711==--