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How to get ip address from C application

You either need to run a dhcp client on your device(like dhclient or udhcpcd) or implement your own DHCP client in your software.

Reply to
Atilla
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You're going to have to explain what you mean by "get IP address".

Again, what do you mean by "get IP address"?

The following function will "get IP address":

char *foo(void) { return "129.168.32.98"; }

Unless you you can tell us what IP address you want to get, that's as good a solution as any.

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Reply to
Grant Edwards

Hi Miloserdin.

There are a few options to get your address. You can use popen("ifconfig eth0"...) and parse the output. Or you can use an SIOCGIFADDR ioctl on a socket (google SIOCGIFADDR for the details).

Steve

Reply to
steve_schefter

You can try to set up a socket and use getsockname() - I've done that with Python, so I guess the C code can use the same principle.

Reply to
David Brown

I'm interesting how to get IP address from C application. I've used gethostname() and gethostbyname() in my application. I've edited /etc/hosts file to add board's hostname and IP address. My board is connected to server which using DHCP. If I remove added lines from /etc/hosts gethostbyname() function returns error. How can I get IP address from my application without using /etc/hosts editing?

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Miloserdin Oleg

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Reply to
Miloserdin Oleg

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