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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2024 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "py/stream.h"
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#include "extmod/modnetwork.h"
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#if MICROPY_PY_NETWORK_PPP_LWIP
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#include "lwip/dns.h"
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#include "netif/ppp/ppp.h"
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#include "netif/ppp/pppapi.h"
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#include "netif/ppp/pppos.h"
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typedef enum {
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STATE_INACTIVE,
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STATE_ACTIVE,
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STATE_ERROR,
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STATE_CONNECTING,
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STATE_CONNECTED,
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} network_ppp_state_t;
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typedef struct _network_ppp_obj_t {
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mp_obj_base_t base;
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network_ppp_state_t state;
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int error_code;
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mp_obj_t stream;
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ppp_pcb *pcb;
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struct netif netif;
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} network_ppp_obj_t;
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const mp_obj_type_t mp_network_ppp_lwip_type;
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static mp_obj_t network_ppp___del__(mp_obj_t self_in);
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static void network_ppp_status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
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network_ppp_obj_t *self = ctx;
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switch (err_code) {
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case PPPERR_NONE:
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self->state = STATE_CONNECTED;
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break;
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case PPPERR_USER:
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network_ppp___del__(MP_OBJ_FROM_PTR(self));
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break;
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default:
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self->state = STATE_ERROR;
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self->error_code = err_code;
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break;
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}
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}
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static mp_obj_t network_ppp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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mp_obj_t stream = all_args[0];
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mp_get_stream_raise(stream, MP_STREAM_OP_READ | MP_STREAM_OP_WRITE);
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network_ppp_obj_t *self = mp_obj_malloc_with_finaliser(network_ppp_obj_t, type);
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self->stream = stream;
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self->state = STATE_INACTIVE;
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return MP_OBJ_FROM_PTR(self);
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}
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static mp_obj_t network_ppp___del__(mp_obj_t self_in) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->pcb != NULL) {
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// Free PPP PCB and reset state.
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ppp_free(self->pcb);
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self->pcb = NULL;
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self->state = STATE_INACTIVE;
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// Disable UART IRQ.
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mp_obj_t dest[3];
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mp_load_method(self->stream, MP_QSTR_irq, dest);
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dest[2] = mp_const_none;
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mp_call_method_n_kw(1, 0, dest);
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}
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(network_ppp___del___obj, network_ppp___del__);
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static mp_obj_t network_ppp_poll(size_t n_args, const mp_obj_t *args) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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uint8_t buf[256];
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if (self->state == STATE_INACTIVE) {
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return MP_OBJ_NEW_SMALL_INT(-MP_EPERM);
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}
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int err;
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mp_uint_t len = mp_stream_rw(self->stream, buf, sizeof(buf), &err, 0);
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if (len > 0) {
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pppos_input(self->pcb, (u8_t *)buf, len);
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}
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return MP_OBJ_NEW_SMALL_INT(len);
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}
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static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(network_ppp_poll_obj, 1, 2, network_ppp_poll);
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static mp_obj_t network_ppp_config(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
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if (n_args != 1 && kwargs->used != 0) {
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mp_raise_TypeError(MP_ERROR_TEXT("either pos or kw args are allowed"));
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}
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// network_ppp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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if (kwargs->used != 0) {
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for (size_t i = 0; i < kwargs->alloc; i++) {
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if (mp_map_slot_is_filled(kwargs, i)) {
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switch (mp_obj_str_get_qstr(kwargs->table[i].key)) {
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default:
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break;
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}
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}
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}
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return mp_const_none;
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}
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if (n_args != 2) {
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mp_raise_TypeError(MP_ERROR_TEXT("can query only one param"));
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}
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mp_obj_t val = mp_const_none;
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switch (mp_obj_str_get_qstr(args[1])) {
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default:
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mp_raise_ValueError(MP_ERROR_TEXT("unknown config param"));
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}
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return val;
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}
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static MP_DEFINE_CONST_FUN_OBJ_KW(network_ppp_config_obj, 1, network_ppp_config);
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static mp_obj_t network_ppp_status(mp_obj_t self_in) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->state == STATE_ERROR) {
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return MP_OBJ_NEW_SMALL_INT(-self->error_code);
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} else {
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return MP_OBJ_NEW_SMALL_INT(self->state);
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}
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(network_ppp_status_obj, network_ppp_status);
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static u32_t network_ppp_output_callback(ppp_pcb *pcb, const void *data, u32_t len, void *ctx) {
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network_ppp_obj_t *self = ctx;
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int err;
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return mp_stream_rw(self->stream, (void *)data, len, &err, MP_STREAM_RW_WRITE);
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}
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static mp_obj_t network_ppp_connect(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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enum { ARG_security, ARG_user, ARG_key };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_security, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = PPPAUTHTYPE_NONE} },
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{ MP_QSTR_user, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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{ MP_QSTR_key, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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};
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mp_arg_val_t parsed_args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 1, args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, parsed_args);
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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if (self->state == STATE_INACTIVE) {
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self->pcb = pppos_create(&self->netif, network_ppp_output_callback, network_ppp_status_cb, self);
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if (self->pcb == NULL) {
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mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("pppos_create failed"));
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}
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self->state = STATE_ACTIVE;
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// Enable UART IRQ to call PPP.poll() when incoming data is ready.
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mp_obj_t dest[4];
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mp_load_method(self->stream, MP_QSTR_irq, dest);
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dest[2] = mp_obj_new_bound_meth(MP_OBJ_FROM_PTR(&network_ppp_poll_obj), MP_OBJ_FROM_PTR(self));
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dest[3] = mp_load_attr(self->stream, MP_QSTR_IRQ_RXIDLE);
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mp_call_method_n_kw(2, 0, dest);
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}
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if (self->state == STATE_CONNECTING || self->state == STATE_CONNECTED) {
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mp_raise_OSError(MP_EALREADY);
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}
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switch (parsed_args[ARG_security].u_int) {
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case PPPAUTHTYPE_NONE:
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case PPPAUTHTYPE_PAP:
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case PPPAUTHTYPE_CHAP:
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break;
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default:
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mp_raise_ValueError(MP_ERROR_TEXT("invalid auth"));
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}
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if (parsed_args[ARG_security].u_int != PPPAUTHTYPE_NONE) {
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const char *user_str = mp_obj_str_get_str(parsed_args[ARG_user].u_obj);
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const char *key_str = mp_obj_str_get_str(parsed_args[ARG_key].u_obj);
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ppp_set_auth(self->pcb, parsed_args[ARG_security].u_int, user_str, key_str);
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}
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netif_set_default(self->pcb->netif);
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ppp_set_usepeerdns(self->pcb, true);
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if (ppp_connect(self->pcb, 0) != ERR_OK) {
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mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("ppp_connect failed"));
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}
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self->state = STATE_CONNECTING;
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// Do a poll in case there is data waiting on the input stream.
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network_ppp_poll(1, args);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_KW(network_ppp_connect_obj, 1, network_ppp_connect);
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static mp_obj_t network_ppp_disconnect(mp_obj_t self_in) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->state == STATE_CONNECTING || self->state == STATE_CONNECTED) {
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// Initiate close and wait for PPPERR_USER callback.
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ppp_close(self->pcb, 0);
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}
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(network_ppp_disconnect_obj, network_ppp_disconnect);
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static mp_obj_t network_ppp_isconnected(mp_obj_t self_in) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(self_in);
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return mp_obj_new_bool(self->state == STATE_CONNECTED);
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(network_ppp_isconnected_obj, network_ppp_isconnected);
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static mp_obj_t network_ppp_ifconfig(size_t n_args, const mp_obj_t *args) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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return mod_network_nic_ifconfig(&self->netif, n_args - 1, args + 1);
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}
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static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(network_ppp_ifconfig_obj, 1, 2, network_ppp_ifconfig);
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static mp_obj_t network_ppp_ipconfig(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
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network_ppp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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return mod_network_nic_ipconfig(&self->netif, n_args - 1, args + 1, kwargs);
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}
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static MP_DEFINE_CONST_FUN_OBJ_KW(network_ppp_ipconfig_obj, 1, network_ppp_ipconfig);
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static const mp_rom_map_elem_t network_ppp_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&network_ppp___del___obj) },
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{ MP_ROM_QSTR(MP_QSTR_config), MP_ROM_PTR(&network_ppp_config_obj) },
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{ MP_ROM_QSTR(MP_QSTR_status), MP_ROM_PTR(&network_ppp_status_obj) },
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{ MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&network_ppp_connect_obj) },
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{ MP_ROM_QSTR(MP_QSTR_disconnect), MP_ROM_PTR(&network_ppp_disconnect_obj) },
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{ MP_ROM_QSTR(MP_QSTR_isconnected), MP_ROM_PTR(&network_ppp_isconnected_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ifconfig), MP_ROM_PTR(&network_ppp_ifconfig_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ipconfig), MP_ROM_PTR(&network_ppp_ipconfig_obj) },
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{ MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&network_ppp_poll_obj) },
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{ MP_ROM_QSTR(MP_QSTR_SEC_NONE), MP_ROM_INT(PPPAUTHTYPE_NONE) },
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{ MP_ROM_QSTR(MP_QSTR_SEC_PAP), MP_ROM_INT(PPPAUTHTYPE_PAP) },
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{ MP_ROM_QSTR(MP_QSTR_SEC_CHAP), MP_ROM_INT(PPPAUTHTYPE_CHAP) },
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};
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static MP_DEFINE_CONST_DICT(network_ppp_locals_dict, network_ppp_locals_dict_table);
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MP_DEFINE_CONST_OBJ_TYPE(
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mp_network_ppp_lwip_type,
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MP_QSTR_PPP,
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MP_TYPE_FLAG_NONE,
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make_new, network_ppp_make_new,
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locals_dict, &network_ppp_locals_dict
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);
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#endif
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Damien George