network_ppp.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 "Eric Poulsen" <eric@zyxod.com>
 *
 * Based on the ESP IDF example code which is Public Domain / CC0
 *
 * 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 "py/runtime.h"
#include "py/mphal.h"
#include "py/objtype.h"
#include "py/stream.h"
#include "netutils.h"
#include "modmachine.h"

#include "netif/ppp/ppp.h"
#include "netif/ppp/pppos.h"
#include "lwip/err.h"
#include "lwip/sockets.h"
#include "lwip/sys.h"
#include "lwip/netdb.h"
#include "lwip/dns.h"
#include "netif/ppp/pppapi.h"

#define PPP_CLOSE_TIMEOUT_MS (4000)

typedef struct _ppp_if_obj_t {
    mp_obj_base_t base;
    bool active;
    bool connected;
    volatile bool clean_close;
    ppp_pcb *pcb;
    mp_obj_t stream;
    SemaphoreHandle_t inactiveWaitSem;
    volatile TaskHandle_t client_task_handle;
    struct netif pppif;
} ppp_if_obj_t;

const mp_obj_type_t ppp_if_type;

static void ppp_status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
    ppp_if_obj_t* self = ctx;
    struct netif *pppif = ppp_netif(self->pcb);

    switch (err_code) {
        case PPPERR_NONE:
            self->connected = (pppif->ip_addr.u_addr.ip4.addr != 0);
            break;
        case PPPERR_USER:
            self->clean_close = true;