Is there any way to check if the SJC is connected already to some port?

[catx0rr]

Hi,

As I try experimenting the payload to use a while loop to not turn it off and on, i made some validation checks to see if shark is connected before executing the payload / script.

at the end of the script:

 

while true; do

    LED B SLOW

    DELAY ${MAIN_SLEEP}

    if [ `CHECK_PORT` == "yes" ]; then

        RESTART_NETWORK

        CREATE_LOOT_DIR

        SETUP_START

        EXECUTE_DHCP_CHECK

    fi

done

Check port is:

function CHECK_PORT() {

     ethtool eth0 | grep Link | awk '{print $3}'

}

eth tool will check if the link is detected:

# ethtool eth0 | grep Link
   Link detected: yes

Also tried: cat /sys/class/net/eth0/carrier to see if carrier value is 1.

It appears to be always connected because of the rj45 head of SharkJack?

[catx0rr]

Found it. it was

# swconfig dev switch0 show | grep link

link: port:0 link:down
link: port:1 link:down
link: port:2 link:down
link: port:3 link:down
link: port:4 link:down
link: port:5 link:down
link: port:6 link:up speed: 1000baseT full-duplex

 

# swconfig dev switch0 show | grep port:0 | awk '{print $3}' | cut -d':' -f2

It appears that eth0 is in link port 0, so made a validation check if it is connected.

function CHECK_LINK_PORT() {

     swconfig dev switch0 show | grep port:0 | awk '{print $3}' | cut -d':' -f2

}

 

while true; do

    LED B SLOW

    DELAY ${MAIN_SLEEP}

    if [ `CHECK_LINK_PORT` == "up" ]; then

        RESTART_NETWORK

        CREATE_LOOT_DIR  

        SETUP_START

        EXECUTE_DHCP_CHECK

    fi

done

Connected SJC to serial port on mobile terminal.. there i was able to check if the device is connected or not.

 

Edited October 8, 2023 by catx0rr