The following non standard constant is supported:

SO_CONTEXTID

It is the socket option flag used to link a socket object to a context identifier after PDP Context Activation procedure.

Note: PDP Context Activation procedure can be obtained using AT+CGDCONT and AT#SGACT commands on MDM or MDM2 interface.

All socket objects must be linked to a context identifier.

In the following example

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.setsockopt(socket.SOL_SOCKET, socket.SO_CONTEXTID, 1)

a socket object is created and then linked to context identifier number one.

Note: There is a firewall always active on module.

Without firewall proper configuration socket methods might not work as expected.

Firewall can be configured using AT#FRWL command on MDM or MDM2 interface.

Sockets used by standard functions (e.g. gethostbyname) are silently linked to context identifier number one.