Pcap need elevated privileges

[fabiodellafiorentina]

I receive the error below from node red:

Error: socket: Operation not permitted
at new PcapSession (/home/pi/.node-red/node_modules/pcap/pcap.js:49:39)
at Object.exports.createSession (/home/pi/.node-red/node_modules/pcap/pcap.js:123:12)
at create_session (/home/pi/.node-red/node_modules/node-red-contrib-amazondash/node_modules/node-dash-button/index. js:12:28)
at register (/home/pi/.node-red/node_modules/node-red-contrib-amazondash/node_modules/node-dash-button/index.js:29: 24)
at new node (/home/pi/.node-red/node_modules/node-red-contrib-amazondash/button-pressed.js:14:20)
at createNode (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/Flow.js:302:18)
at Flow.start (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/Flow.js:87:35)
at start (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/index.js:277:29)
at tryCatchReject (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:845:30)
at runContinuation1 (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:804:4)
at Fulfilled.when (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:592:4)
at Pending.run (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:483:13)
at Scheduler._drain (/usr/lib/node_modules/node-red/node_modules/when/lib/Scheduler.js:62:19)
at Scheduler.drain (/usr/lib/node_modules/node-red/node_modules/when/lib/Scheduler.js:27:9)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)
Failed to create pcap session: couldn't find devices to listen on.
Try running with elevated privileges via 'sudo'
6 Jan 23:03:35 - [error] [ButtonPressed:79260a05.2b2d34] Error: Error: No devices to listen

I understand I need to run Pcap with higher privileges. Do you have any ideas?

[pucbaldwin]

I have the same issue. Tried doing "sudo node-red-start" but same problem.

[mesche]

@pucbaldwin
have you tried to set the filesystem capabilities for 'node' ?

sudo setcap 'cap_net_raw,cap_net_admin+eip' $(readlink -f $(which node))

you can find more infos here (german).