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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/lib/mwan3/common.sh
+5 -3
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@@ -49,10 +49,12 @@ mwan3_get_true_iface()
mwan3_get_src_ip()
{
local family _src_ip true_iface device addr_cmd default_ip IP sed_str
true_iface=$2
local family _src_ip interface true_iface device addr_cmd default_ip IP sed_str
interface=$2
mwan3_get_true_iface true_iface $interface
unset "$1"
config_get family "$true_iface" family ipv4
config_get family "$interface" family ipv4
if [ "$family" = "ipv4" ]; then
addr_cmd='network_get_ipaddr'
default_ip="0.0.0.0"