Thread: write a license for c project

Hi everyone, new on this site, but hope someone can help me solve this problem.

i want to write a license check system for my c project(.c | .h).
my project finished and now i want to set a license for it ...

i want a license source with this

when client want to run my compiled project ( ./myproject)

the project first load a license like this :

first check the server ip ... (linux ipv4)
second go to this url : http://mysite.com/$serverip.txt

if the file exist and in the file wrote (Active) come back and run the project

else if the file not exist show ( there is not license)
else if the file exist and wrote (Expired ) (in the http://mysite.com/$serverip.txt) Come back and show ( the license expired) and not run the project .(exit from file)(stop the file)

please help me . tnx

this is merely a learning exercise on network programming forget the name (License) I need c source that work like this: get the server ip (ipv4) after that check the url : http://mysite.com/$serverip.txt the are 2 options : if this file (serverip.txt) exist : 1- check if there is (Active) word on this txt file (Just Active Word) get back to c project other classes and run the other project classes (work like license ( if there is license run other c clases)(pass the license function and go to run other clasees) 2- else if there is (Expire) word on this txt file (Just Expire Word) stop the running and show the error ( License Expired) and stop other clasees) if this file (serverip.txt) dosnt exsit : stop the running and show the error ( There is no License) and stop other clasees)

Originally Posted by laserlight

Is this merely a learning exercise on network programming, or are you really trying to write a license check for software to be sold?

this is merely a learning exercise on network programming

forget the name (License)

I need c source that work like this:

get the server ip (ipv4)
after that check the url : http://mysite.com/$serverip.txt


the are 2 options :

if this file (serverip.txt) exist :

1- check if there is (Active) word on this txt file (Just Active Word) get back to c project other classes and run the other project classes (work like license ( if there is license run other c clases)(pass the license function and go to run other clasees)
2- else if there is (Expire) word on this txt file (Just Expire Word) stop the running and show the error ( License Expired) and stop other clasees)

if this file (serverip.txt) dosnt exsit : stop the running and show the error ( There is no License) and stop other clasees)

Originally Posted by c99tutorial

To make requests for remote URLs probabls the easiest way is to use libcurl. After you pull down the remote file you can do whatever checks you want on the contents of that remote file and act accordingly.

curl and libcurl

I now this but i dont want to use libcurl for some reason ... i just want some source that do like (what i said about theme)
For example, to get ip :

Code:

#include <stdio.h>      
#include <sys/types.h>
#include <ifaddrs.h>
#include <netinet/in.h> 
#include <string.h> 
#include <arpa/inet.h>

int main (int argc, const char * argv[]) {
    struct ifaddrs * ifAddrStruct=NULL;
    struct ifaddrs * ifa=NULL;
    void * tmpAddrPtr=NULL;

    getifaddrs(&ifAddrStruct);

    for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
        if (ifa ->ifa_addr->sa_family==AF_INET) { // check it is IP4
            // is a valid IP4 Address
            tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
            char addressBuffer[INET_ADDRSTRLEN];
            inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
            printf("%s IP Address %s\n", ifa->ifa_name, addressBuffer); 
        } else if (ifa->ifa_addr->sa_family==AF_INET6) { // check it is IP6
            // is a valid IP6 Address
            tmpAddrPtr=&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
            char addressBuffer[INET6_ADDRSTRLEN];
            inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
            printf("%s IP Address %s\n", ifa->ifa_name, addressBuffer); 
        } 
    }
    if (ifAddrStruct!=NULL) freeifaddrs(ifAddrStruct);
    return 0;
}

this is the first source i need the other functions

Any answer !!! Update !