111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*
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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) 2020 Scott Shawcroft for Adafruit Industries
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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 "shared-bindings/socketpool/SocketPool.h"
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#include "common-hal/socketpool/Socket.h"
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#include "shared/runtime/interrupt_char.h"
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#include "py/runtime.h"
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#include "shared-bindings/wifi/__init__.h"
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#include "lwip/dns.h"
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#include "lwip/inet.h"
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void common_hal_socketpool_socketpool_construct(socketpool_socketpool_obj_t *self, mp_obj_t radio) {
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if (radio != MP_OBJ_FROM_PTR(&common_hal_wifi_radio_obj)) {
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mp_raise_ValueError(translate("SocketPool can only be used with wifi.radio"));
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}
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}
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// common_hal_socketpool_socket is in socketpool/Socket.c to centralize open socket tracking.
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typedef struct _getaddrinfo_state_t {
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volatile int status;
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volatile ip_addr_t ipaddr;
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} getaddrinfo_state_t;
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STATIC void lwip_getaddrinfo_cb(const char *name, const ip_addr_t *ipaddr, void *arg) {
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getaddrinfo_state_t *state = arg;
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if (ipaddr != NULL) {
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state->status = 1;
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state->ipaddr = *ipaddr;
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} else {
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// error
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state->status = -2;
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}
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}
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int socketpool_resolve_host(socketpool_socketpool_obj_t *self, const char *host, ip_addr_t *addr) {
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getaddrinfo_state_t state;
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state.status = 0;
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MICROPY_PY_LWIP_ENTER
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err_t ret = dns_gethostbyname(host, (ip_addr_t *)&state.ipaddr, lwip_getaddrinfo_cb, &state);
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MICROPY_PY_LWIP_EXIT
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switch (ret) {
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case ERR_OK:
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// cached
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state.status = 1;
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break;
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case ERR_INPROGRESS:
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while (state.status == 0) {
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RUN_BACKGROUND_TASKS;
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if (mp_hal_is_interrupted()) {
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break;
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}
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}
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break;
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default:
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state.status = ret;
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}
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if (state.status < 0) {
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return state.status;
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// TODO: CPython raises gaierror, we raise with native lwIP negative error
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// values, to differentiate from normal errno's at least in such way.
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mp_raise_OSError(state.status);
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}
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*addr = state.ipaddr;
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return 0;
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}
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mp_obj_t common_hal_socketpool_socketpool_gethostbyname(socketpool_socketpool_obj_t *self,
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const char *host) {
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ip_addr_t addr;
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int result = socketpool_resolve_host(self, host, &addr);
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if (result < 0) {
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mp_raise_OSError(-result);
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}
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char ip_str[IP4ADDR_STRLEN_MAX];
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inet_ntoa_r(addr, ip_str, IP4ADDR_STRLEN_MAX);
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mp_obj_t ip_obj = mp_obj_new_str(ip_str, strlen(ip_str));
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return ip_obj;
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}
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