bananatools/taikohook/network.c

#include <windows.h>

#include "taikohook/network.h"

#include "hook/table.h"

#include "util/dprintf.h"

/*
 * Forces Taiko to use TLS v1.2 instead of 1.0
 * This was made to solve a niche issue with
 * the server stack I was using. Recomend
 * leaving it disabled.
*/

void network_insert_hooks(HMODULE target);

static uint64_t my_TLSv1_method(uint64_t a1, uint64_t flag);
static uint64_t (*next_TLSv1_2_method)(uint64_t a1, uint64_t flag);
static uint64_t (*next_TLSv1_method)(uint64_t a1, uint64_t flag);

static const struct hook_symbol nethook_syms[] = {
    {
        .link = (void *) &next_TLSv1_2_method,
        .ordinal = 341
    },
    {
        .patch = my_TLSv1_method,
        .link = (void *) &next_TLSv1_method,
        .ordinal = 172
    },
};

HRESULT network_hook_init(const struct taiko_network_config *cfg)
{
    if (!cfg->enable) {
        return S_FALSE;
    }

    dprintf("Nethook: Init\n");
    network_insert_hooks(NULL);

    return S_OK;
}

void network_insert_hooks(HMODULE target)
{
    hook_table_apply(
        target,
        "SSLEAY32.dll",
        nethook_syms,
        _countof(nethook_syms)
    );
}

static uint64_t my_TLSv1_method(uint64_t a1, uint64_t flag)
{
    dprintf("Nethook: Redirect TLS v1.0 to v1.2\n");
    return next_TLSv1_2_method(a1, flag);
}