function::tcpmib_get_state - Linux

Overview

tcpmib_get_state is a command-line utility used to retrieve the current state of TCP/IP connectivity from the Linux networking stack. It provides detailed information about TCP connection statistics, specific socket states, and various TCP/IP networking metrics.

Syntax

tcpmib_get_state [options]

Options/Flags

• -i, --interface: Specify the network interface to inspect.
• -p, --port: Retrieve state information for a specific port number.
• -s, --socket: Display statistics for a particular socket state (e.g., ESTABLISHED, CLOSED).
• -a, --all: Show information for all active TCP connections.
• -v, --verbose: Enable verbose output, providing more detailed statistics.
• -h, --help: Print usage information and exit.

Examples

Get overall TCP/IP connection statistics:

tcpmib_get_state

Retrieve information for specific ports:

tcpmib_get_state -p 80
tcpmib_get_state -p 443 -v

Filter results by socket state:

tcpmib_get_state -s ESTABLISHED
tcpmib_get_state -s CLOSED -i eth0

Display information for all active TCP connections:

tcpmib_get_state -a

Common Issues

• Incorrect interface: If the specified interface is not active, the command will not provide accurate results.
• Invalid port number: Port numbers must be within the valid range (0-65535).
• Permission denied: The command requires root privileges to access network statistics.

Integration

tcpmib_get_state can be integrated with other commands or scripts for advanced network analysis and monitoring. For example:

• Combining with netstat: tcpmib_get_state -a | netstat -an
• Parsing output with Python: import subprocess; subprocess.check_output("tcpmib_get_state -a")

Related Commands

• netstat: Display network connections, routing tables, and interface statistics.
• ss: More advanced tool for inspecting TCP/IP connections and sockets.
• ifconfig: Configure and display network interface parameters.