How to change the ip address of imx7 1gb through programming with snmp protocol

can you please provide sample code or headers for accessing and changing the ip addresss of it through mibbrowser user give the ip address and the program written in c language ,

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Handshake,

To change the IP address of an iMX7 1GB module programmatically using the SNMP protocol, you would typically interact with the system’s network configuration interfaces indirectly, as SNMP operates at a higher level of abstraction compared to direct system configuration files or command-line utilities like ifconfig or ip.

However, to achieve this, you need to ensure that your system has SNMP services configured and that you have the MIBs (Management Information Bases) relevant to network configuration. Linux systems commonly use the net-snmp library for SNMP operations, which includes both the daemon and an API for programming.

Here’s a simplified approach to get you started:

  1. Install net-snmp: Ensure that net-snmp and net-snmp-devel (the development libraries for C programming) are installed on your system. For Torizon, you may need to add these to your container or the base system using the appropriate package manager commands.

  2. Understand MIBs for IP Configuration: The IP address configuration is typically managed through the IP-MIB and IF-MIB MIBs. Specifically, you might be interested in ipAdEntAddr, ipAdEntNetMask, and ipAdEntIfIndex objects for IP address management. However, changing the IP address via SNMP is not straightforward because standard MIBs are primarily for monitoring rather than configuration.

  3. Write Your C Program: You will use the net-snmp library functions in your C program. Here’s a very basic outline of how you might start, focusing on SNMP GET operations as a starting point. Note that changing the IP would usually involve SNMP SET operations, which are more complex and require proper community string (with write access) and understanding of the MIBs involved.

#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>

int main(int argc, char ** argv) {
    struct snmp_session session;
    struct snmp_session *sess_handle;

    // Initialize the SNMP session. Details omitted for brevity.
    snmp_sess_init( &session );
    session.peername = strdup("your.imx7.device.ip");

    // Use SNMP version 2c or 3 for better security
    session.version = SNMP_VERSION_2c;

    // Set the community string for authentication
    session.community = "public";
    session.community_len = strlen(session.community);
		

Please, also check if these links can help you solve your problem:

https://developer.toradex.com/software/cortex-m/cortex-m-shared-memory-guide
https://developer.toradex.com/software/development-resources/ssh.

the above links are not opening i want some more detailed information

Hi @surya11,
You can ignore those links.
Please let us know what more detailed information you need.
Referring to your previous post, were you able to include snmp packages on the image?

opkg update
opkg instal net-snmp
opkg install net-snmp-server
by using this commands

Hi @surya11,
What is the BSP version you are using?

i am using stable lxrde image (2020)

how to change the ip address of imx7 through serial communication and to display the ip addrees of toradex in mibbrowser

Hi @surya11,
You need to use the newer image as the image that you are using is no longer supported.
You can check the new images from here
Also, you may need to customize your image by adding snmp packages as mentioned on your previous post.
Let me know if you need more help.

add and created image also but y it was showing like this
couldnot satisfy after giving
opkg install net-snmp

Hi @surya11,
Starting with BSP 3.0, we dropped the support for Angstrom distribution so the package manager will not work. In short, you will not be able to install packages using "opkg install " because the feeds are not available.
You need to add packages and build the image as told in our previous posts .
Let me know if you are facing issue in adding packages /compiling the image.
Let us now if you still have doubts, we can connect and answers your questions

how to change the ip address of imx7 through c programming itself
changing its own ip through programming

hi @surya11 ,
Please refer to snmp coding tutorials

i getting this warning while creating the image and the image is not create at .can you tell where the image location after building image
![Screenshot from 2024-06-30 12-22-05|690x395](upload://


.png)

Hi @surya11,

You can find the images in build/deploy/images