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circuitpython/shared-module/network/__init__.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Nick Moore
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include "py/objlist.h"
#include "py/runtime.h"
#include "py/mphal.h"
#include "py/mperrno.h"
#include "supervisor/shared/tick.h"
#include "shared-bindings/random/__init__.h"
#include "shared-module/network/__init__.h"
// mod_network_nic_list needs to be declared in mpconfigport.h
void network_module_init(void) {
mp_obj_list_init(&MP_STATE_PORT(mod_network_nic_list), 0);
}
void network_module_deinit(void) {
for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
mod_network_nic_type_t *nic_type = (mod_network_nic_type_t*)mp_obj_get_type(nic);
if (nic_type->deinit != NULL) nic_type->deinit(nic);
}
mp_obj_list_set_len(&MP_STATE_PORT(mod_network_nic_list), 0);
}
void network_module_background(void) {
static uint32_t next_tick = 0;
uint32_t this_tick = supervisor_ticks_ms32();
if (this_tick < next_tick) return;
next_tick = this_tick + 1000;
for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
mod_network_nic_type_t *nic_type = (mod_network_nic_type_t*)mp_obj_get_type(nic);
if (nic_type->timer_tick != NULL) nic_type->timer_tick(nic);
}
}
void network_module_register_nic(mp_obj_t nic) {
for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
if (MP_STATE_PORT(mod_network_nic_list).items[i] == nic) {
// nic already registered
return;
}
}
// nic not registered so add to list
mp_obj_list_append(MP_OBJ_FROM_PTR(&MP_STATE_PORT(mod_network_nic_list)), nic);
}
mp_obj_t network_module_find_nic(const uint8_t *ip) {
// find a NIC that is suited to given IP address
for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
// TODO check IP suitability here
//mod_network_nic_type_t *nic_type = (mod_network_nic_type_t*)mp_obj_get_type(nic);
return nic;
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, translate("no available NIC")));
}
void network_module_create_random_mac_address(uint8_t *mac) {
uint32_t rb1 = shared_modules_random_getrandbits(24);
uint32_t rb2 = shared_modules_random_getrandbits(24);
// first octet has multicast bit (0) cleared and local bit (1) set
// everything else is just set randomly
mac[0] = ((uint8_t)(rb1 >> 16) & 0xfe) | 0x02;
mac[1] = (uint8_t)(rb1 >> 8);
mac[2] = (uint8_t)(rb1);
mac[3] = (uint8_t)(rb2 >> 16);
mac[4] = (uint8_t)(rb2 >> 8);
mac[5] = (uint8_t)(rb2);
}
uint16_t network_module_create_random_source_tcp_port(void) {
return 0xc000 | shared_modules_random_getrandbits(14);
}