From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonatan Schlag To: network@lists.ipfire.org Subject: [network] [PATCH 3/4] util: add function mtu_is_valid Date: Sat, 03 Jun 2017 13:25:09 +0200 Message-ID: <1496489110-10134-3-git-send-email-jonatan.schlag@ipfire.org> In-Reply-To: <1496489110-10134-1-git-send-email-jonatan.schlag@ipfire.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============4545241435347127869==" List-Id: --===============4545241435347127869== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit This function checks if an mtu is valid for a given IP protocol. Signed-off-by: Jonatan Schlag --- src/functions/functions.util | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/src/functions/functions.util b/src/functions/functions.util index 4b6f956..98ad9d4 100644 --- a/src/functions/functions.util +++ b/src/functions/functions.util @@ -321,6 +321,25 @@ isipaddress() { ip_is_valid ${addr} } +mtu_is_valid() { + +local proto=${1} +local mtu=${2} + +case ${proto} in + ipv4) + [ ${mtu} -ge 576 ] && [ ${mtu} -le 9000 ] + ;; + ipv6) + [ ${mtu} -ge 1280 ] && [ ${mtu} -le 9000 ] + ;; + *) + error "${proto} is not a valid proto" + return ${EXIT_ERROR} + ;; +esac +} + backtrace() { local start=1 -- 2.6.3 --===============4545241435347127869==--