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mwan3: add "use" function to mwan3 utils

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Use "mwan3 use" to wrap a command with interface bindings so that you can
avoid the mwan3 rules and test behavior on a specific interface.

eg "mwan3 use wan ping -c1 1.1.1.1"

Additional binding arguments to the command will have their system
calls intercepted and ignored.

eg "mwan3 use wan ping -c1 -I tun0 1.1.1.1" will use the
device associated with "wan", rather than "tun0".

Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>
This commit is contained in:
Aaron Goodman
2020-08-25 18:16:07 -04:00
parent bbbc6127ab
commit d49ca29eca
3 changed files with 44 additions and 17 deletions
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net/mwan3/files/usr/sbin/mwan3track
+2 -2
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@@ -129,7 +129,7 @@ firstconnect() {
return
fi
mwan3_get_src_ip SRC_IP $true_iface
mwan3_get_src_ip SRC_IP $INTERFACE
LOG debug "firstconnect: called on $INTERFACE/$true_iface ($DEVICE). Status is $STATUS. SRC_IP is $SRC_IP"
@@ -223,7 +223,7 @@ main() {
wait $TRACK_PID
result=$?
else
WRAP $PING -${family#ipv} -I ${SOURCE} -c $count -W $timeout -s $size -t $max_ttl -q $track_ip 2>/dev/null > $TRACK_OUTPUT &
WRAP $PING -${family#ipv} -c $count -W $timeout -s $size -t $max_ttl -q $track_ip 2>/dev/null > $TRACK_OUTPUT &
TRACK_PID=$!
wait $TRACK_PID
ping_status=$?