Not found function "recv" and any functions from Socket API in libc

[ViacheslavN]

@kubo Hello

Thanks for your project, I have a usage question, is it possible to intercept a function with STB_LOCAL binding, because it seems that these functions are not in PLT

Some code:

   plthook_t *plthook;
    if (plthook_open(&plthook, "libc.so.6") != 0) {
        printf("plthook_open error: %s\n", plthook_error());
        return -1;
    }
    if (plthook_replace(plthook, "recv", (void*)my_recv, NULL) != 0) {
        printf("plthook_replace error: %s\n", plthook_error());
        plthook_close(plthook);
        return -1;
    }
    plthook_close(plthook);
    return 0;
}

[kubo]

I have a usage question, is it possible to intercept a function with STB_LOCAL binding

No. In addition even if it is possible, the function will be intercepted only when the caller is in libc.so. It doesn't affect function calls by outside of libc. How about funchook instead?

[ViacheslavN]

How about funchook instead?

Yes, it works, thanks.