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micropython/ports/esp32/modsocket.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* Development of the code in this file was sponsored by Microbric Pty Ltd
* and Mnemote Pty Ltd
*
* The MIT License (MIT)
*
* Copyright (c) 2016, 2017 Nick Moore @mnemote
*
* Based on extmod/modlwip.c
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Galen Hazelwood
*
* 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 <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "py/gc.h"
#include "py/runtime0.h"
#include "py/nlr.h"
#include "py/objlist.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "py/mperrno.h"
#include "py/mphal.h"
#include "py/stream.h"
#include "py/mperrno.h"
#include "shared/netutils/netutils.h"
#include "modnetwork.h"
#include "lwip/sockets.h"
#include "lwip/netdb.h"
#include "lwip/ip4.h"
#include "lwip/igmp.h"
#include "esp_log.h"
#define SOCKET_POLL_US (100000)
#define MDNS_QUERY_TIMEOUT_MS (5000)
#define MDNS_LOCAL_SUFFIX ".local"
#ifndef NO_QSTR
#include "mdns.h"
#endif
enum {
SOCKET_STATE_NEW,
SOCKET_STATE_CONNECTED,
SOCKET_STATE_PEER_CLOSED,
};
typedef struct _socket_obj_t {
mp_obj_base_t base;
int fd;
uint8_t domain;
uint8_t type;
uint8_t proto;
uint8_t state;
unsigned int retries;
#if MICROPY_PY_SOCKET_EVENTS
mp_obj_t events_callback;
struct _socket_obj_t *events_next;
#endif
} socket_obj_t;
STATIC const char *TAG = "modsocket";
void _socket_settimeout(socket_obj_t *sock, uint64_t timeout_ms);
#if MICROPY_PY_SOCKET_EVENTS
// Support for callbacks on asynchronous socket events (when socket becomes readable)
// This divisor is used to reduce the load on the system, so it doesn't poll sockets too often
#define USOCKET_EVENTS_DIVISOR (8)
STATIC uint8_t socket_events_divisor;
STATIC socket_obj_t *socket_events_head;
void socket_events_deinit(void) {
socket_events_head = NULL;
}
// Assumes the socket is not already in the linked list, and adds it
STATIC void socket_events_add(socket_obj_t *sock) {
sock->events_next = socket_events_head;
socket_events_head = sock;
}
// Assumes the socket is already in the linked list, and removes it
STATIC void socket_events_remove(socket_obj_t *sock) {
for (socket_obj_t **s = &socket_events_head;; s = &(*s)->events_next) {
if (*s == sock) {
*s = (*s)->events_next;
return;
}
}
}
// Polls all registered sockets for readability and calls their callback if they are readable
void socket_events_handler(void) {
if (socket_events_head == NULL) {
return;
}
if (--socket_events_divisor) {
return;
}
socket_events_divisor = USOCKET_EVENTS_DIVISOR;
fd_set rfds;
FD_ZERO(&rfds);
int max_fd = 0;
for (socket_obj_t *s = socket_events_head; s != NULL; s = s->events_next) {
FD_SET(s->fd, &rfds);
max_fd = MAX(max_fd, s->fd);
}
// Poll the sockets
struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 };
int r = select(max_fd + 1, &rfds, NULL, NULL, &timeout);
if (r <= 0) {
return;
}
// Call the callbacks
for (socket_obj_t *s = socket_events_head; s != NULL; s = s->events_next) {
if (FD_ISSET(s->fd, &rfds)) {
mp_call_function_1_protected(s->events_callback, s);
}
}
}
#endif // MICROPY_PY_SOCKET_EVENTS
static inline void check_for_exceptions(void) {
mp_handle_pending(true);
}
// This function mimics lwip_getaddrinfo, with added support for mDNS queries
static int _socket_getaddrinfo3(const char *nodename, const char *servname,
const struct addrinfo *hints, struct addrinfo **res) {
#if MICROPY_HW_ENABLE_MDNS_QUERIES
int nodename_len = strlen(nodename);
const int local_len = sizeof(MDNS_LOCAL_SUFFIX) - 1;
if (nodename_len > local_len
&& strcasecmp(nodename + nodename_len - local_len, MDNS_LOCAL_SUFFIX) == 0) {
// mDNS query
char nodename_no_local[nodename_len - local_len + 1];
memcpy(nodename_no_local, nodename, nodename_len - local_len);
nodename_no_local[nodename_len - local_len] = '\0';
esp_ip4_addr_t addr = {0};
esp_err_t err = mdns_query_a(nodename_no_local, MDNS_QUERY_TIMEOUT_MS, &addr);
if (err != ESP_OK) {
if (err == ESP_ERR_NOT_FOUND) {
*res = NULL;
return 0;
}
*res = NULL;
return err;
}
struct addrinfo *ai = memp_malloc(MEMP_NETDB);
if (ai == NULL) {
*res = NULL;
return EAI_MEMORY;
}
memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_storage));
struct sockaddr_in *sa = (struct sockaddr_in *)((uint8_t *)ai + sizeof(struct addrinfo));
inet_addr_from_ip4addr(&sa->sin_addr, &addr);
sa->sin_family = AF_INET;
sa->sin_len = sizeof(struct sockaddr_in);
sa->sin_port = lwip_htons((u16_t)atoi(servname));
ai->ai_family = AF_INET;
ai->ai_canonname = ((char *)sa + sizeof(struct sockaddr_storage));
memcpy(ai->ai_canonname, nodename, nodename_len + 1);
ai->ai_addrlen = sizeof(struct sockaddr_storage);
ai->ai_addr = (struct sockaddr *)sa;
*res = ai;
return 0;
}
#endif
// Normal query
return lwip_getaddrinfo(nodename, servname, hints, res);
}
static int _socket_getaddrinfo2(const mp_obj_t host, const mp_obj_t portx, struct addrinfo **resp) {
const struct addrinfo hints = {
.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM,
};
mp_obj_t port = portx;
if (mp_obj_is_integer(port)) {
// This is perverse, because lwip_getaddrinfo promptly converts it back to an int, but
// that's the API we have to work with ...
port = mp_obj_str_binary_op(MP_BINARY_OP_MODULO, mp_obj_new_str_via_qstr("%s", 2), port);
}
const char *host_str = mp_obj_str_get_str(host);
const char *port_str = mp_obj_str_get_str(port);
if (host_str[0] == '\0') {
// a host of "" is equivalent to the default/all-local IP address
host_str = "0.0.0.0";
}
MP_THREAD_GIL_EXIT();
int res = _socket_getaddrinfo3(host_str, port_str, &hints, resp);
MP_THREAD_GIL_ENTER();
// Per docs: instead of raising gaierror getaddrinfo raises negative error number
if (res != 0) {
mp_raise_OSError(res > 0 ? -res : res);
}
// Somehow LwIP returns a resolution of 0.0.0.0 for failed lookups, traced it as far back
// as netconn_gethostbyname_addrtype returning OK instead of error.
if (*resp == NULL ||
(strcmp(resp[0]->ai_canonname, "0.0.0.0") == 0 && strcmp(host_str, "0.0.0.0") != 0)) {
mp_raise_OSError(-2); // name or service not known
}
return res;
}
STATIC void _socket_getaddrinfo(const mp_obj_t addrtuple, struct addrinfo **resp) {
mp_obj_t *elem;
mp_obj_get_array_fixed_n(addrtuple, 2, &elem);
_socket_getaddrinfo2(elem[0], elem[1], resp);
}
STATIC mp_obj_t socket_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 3, false);
socket_obj_t *sock = m_new_obj_with_finaliser(socket_obj_t);
sock->base.type = type_in;
sock->domain = AF_INET;
sock->type = SOCK_STREAM;
sock->proto = 0;
if (n_args > 0) {
sock->domain = mp_obj_get_int(args[0]);
if (n_args > 1) {
sock->type = mp_obj_get_int(args[1]);
if (n_args > 2) {
sock->proto = mp_obj_get_int(args[2]);
}
}
}
sock->state = sock->type == SOCK_STREAM ? SOCKET_STATE_NEW : SOCKET_STATE_CONNECTED;
sock->fd = lwip_socket(sock->domain, sock->type, sock->proto);
if (sock->fd < 0 && errno == ENFILE) {
// ESP32 LWIP has a hard socket limit, ENFILE is returned when this is
// reached. Similar to the logic elsewhere for MemoryError, try running
// GC before failing outright.
gc_collect();
sock->fd = lwip_socket(sock->domain, sock->type, sock->proto);
}
if (sock->fd < 0) {
mp_raise_OSError(errno);
}
_socket_settimeout(sock, UINT64_MAX);
return MP_OBJ_FROM_PTR(sock);
}
STATIC mp_obj_t socket_bind(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
struct addrinfo *res;
_socket_getaddrinfo(arg1, &res);
self->state = SOCKET_STATE_CONNECTED;
int r = lwip_bind(self->fd, res->ai_addr, res->ai_addrlen);
lwip_freeaddrinfo(res);
if (r < 0) {
mp_raise_OSError(errno);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
// method socket.listen([backlog])
STATIC mp_obj_t socket_listen(size_t n_args, const mp_obj_t *args) {
socket_obj_t *self = MP_OBJ_TO_PTR(args[0]);
int backlog = MICROPY_PY_SOCKET_LISTEN_BACKLOG_DEFAULT;
if (n_args > 1) {
backlog = mp_obj_get_int(args[1]);
backlog = (backlog < 0) ? 0 : backlog;
}
self->state = SOCKET_STATE_CONNECTED;
int r = lwip_listen(self->fd, backlog);
if (r < 0) {
mp_raise_OSError(errno);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_listen_obj, 1, 2, socket_listen);
STATIC mp_obj_t socket_accept(const mp_obj_t arg0) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
struct sockaddr addr;
socklen_t addr_len = sizeof(addr);
int new_fd = -1;
for (int i = 0; i <= self->retries; i++) {
MP_THREAD_GIL_EXIT();
new_fd = lwip_accept(self->fd, &addr, &addr_len);
MP_THREAD_GIL_ENTER();
if (new_fd >= 0) {
break;
}
if (errno != EAGAIN) {
mp_raise_OSError(errno);
}
check_for_exceptions();
}
if (new_fd < 0) {
if (self->retries == 0) {
mp_raise_OSError(MP_EAGAIN);
} else {
mp_raise_OSError(MP_ETIMEDOUT);
}
}
// create new socket object
socket_obj_t *sock = m_new_obj_with_finaliser(socket_obj_t);
sock->base.type = self->base.type;
sock->fd = new_fd;
sock->domain = self->domain;
sock->type = self->type;
sock->proto = self->proto;
sock->state = SOCKET_STATE_CONNECTED;
_socket_settimeout(sock, UINT64_MAX);
// make the return value
uint8_t *ip = (uint8_t *)&((struct sockaddr_in *)&addr)->sin_addr;
mp_uint_t port = lwip_ntohs(((struct sockaddr_in *)&addr)->sin_port);
mp_obj_tuple_t *client = mp_obj_new_tuple(2, NULL);
client->items[0] = sock;
client->items[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
return client;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);
STATIC mp_obj_t socket_connect(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
struct addrinfo *res;
bool blocking = false;
int flags;
int raise_err = 0;
_socket_getaddrinfo(arg1, &res);
MP_THREAD_GIL_EXIT();
self->state = SOCKET_STATE_CONNECTED;
flags = fcntl(self->fd, F_GETFL);
blocking = (flags & O_NONBLOCK) == 0;
if (blocking) {
// For blocking sockets, make the socket temporarily non-blocking and emulate
// blocking using select.
//
// This has two benefits:
//
// - Allows handling external exceptions while waiting for connect.
//
// - Allows emulating a connect timeout, which is not supported by LWIP or
// required by POSIX but is normal behaviour for CPython.
if (fcntl(self->fd, F_SETFL, flags | O_NONBLOCK) < 0) {
ESP_LOGE(TAG, "fcntl set failed %d", errno); // Unexpected internal failure
raise_err = errno;
}
}
if (raise_err == 0) {
// Try performing the actual connect. Expected to always return immediately.
int r = lwip_connect(self->fd, res->ai_addr, res->ai_addrlen);
if (r != 0) {
raise_err = errno;
}
}
if (blocking) {
// Set the socket back to blocking. We can still pass it to select() in this state.
int r = fcntl(self->fd, F_SETFL, flags);
if (r != 0 && (raise_err == 0 || raise_err == EINPROGRESS)) {
ESP_LOGE(TAG, "fcntl restore failed %d", errno); // Unexpected internal failure
raise_err = errno;
}
}
lwip_freeaddrinfo(res);
if (blocking && raise_err == EINPROGRESS) {
// Keep calling select() until the socket is marked writable (i.e. connected),
// or an error or a timeout occurs
// Note: _socket_settimeout() always sets self->retries != 0 on blocking sockets.
for (unsigned int i = 0; i <= self->retries; i++) {
struct timeval timeout = {
.tv_sec = 0,
.tv_usec = SOCKET_POLL_US,
};
fd_set wfds;
FD_ZERO(&wfds);
FD_SET(self->fd, &wfds);
int r = select(self->fd + 1, NULL, &wfds, NULL, &timeout);
if (r < 0) {
// Error condition
raise_err = errno;
break;
} else if (r > 0) {
// Select indicated the socket is writable. Check for any error.
socklen_t socklen = sizeof(raise_err);
r = getsockopt(self->fd, SOL_SOCKET, SO_ERROR, &raise_err, &socklen);
if (r < 0) {
raise_err = errno;
}
break;
} else {
// Select timed out
raise_err = ETIMEDOUT;
MP_THREAD_GIL_ENTER();
check_for_exceptions();
MP_THREAD_GIL_EXIT();
}
}
}
MP_THREAD_GIL_ENTER();
if (raise_err) {
mp_raise_OSError(raise_err);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);
STATIC mp_obj_t socket_setsockopt(size_t n_args, const mp_obj_t *args) {
(void)n_args; // always 4
socket_obj_t *self = MP_OBJ_TO_PTR(args[0]);
int opt = mp_obj_get_int(args[2]);
switch (opt) {
// level: SOL_SOCKET
case SO_REUSEADDR:
case SO_BROADCAST: {
int val = mp_obj_get_int(args[3]);
int ret = lwip_setsockopt(self->fd, SOL_SOCKET, opt, &val, sizeof(int));
if (ret != 0) {
mp_raise_OSError(errno);
}
break;
}
case SO_BINDTODEVICE: {
size_t len;
const char *val = mp_obj_str_get_data(args[3], &len);
char ifname[NETIF_NAMESIZE] = {0};
memcpy(&ifname, val, len);
int ret = lwip_setsockopt(self->fd, SOL_SOCKET, opt, &ifname, NETIF_NAMESIZE);
if (ret != 0) {
mp_raise_OSError(errno);
}
break;
}
#if MICROPY_PY_SOCKET_EVENTS
// level: SOL_SOCKET
// special "register callback" option
case 20: {
if (args[3] == mp_const_none) {
if (self->events_callback != MP_OBJ_NULL) {
socket_events_remove(self);
self->events_callback = MP_OBJ_NULL;
}
} else {
if (self->events_callback == MP_OBJ_NULL) {
socket_events_add(self);
}
self->events_callback = args[3];
}
break;
}
#endif
// level: IPPROTO_IP
case IP_ADD_MEMBERSHIP: {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
if (bufinfo.len != sizeof(ip4_addr_t) * 2) {
mp_raise_ValueError(NULL);
}
// POSIX setsockopt has order: group addr, if addr, lwIP has it vice-versa
err_t err = igmp_joingroup((const ip4_addr_t *)bufinfo.buf + 1, bufinfo.buf);
if (err != ERR_OK) {
mp_raise_OSError(-err);
}
break;
}
default:
mp_printf(&mp_plat_print, "Warning: lwip.setsockopt() option not implemented\n");
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt);
void _socket_settimeout(socket_obj_t *sock, uint64_t timeout_ms) {
// Rather than waiting for the entire timeout specified, we wait sock->retries times
// for SOCKET_POLL_US each, checking for a MicroPython interrupt between timeouts.
// with SOCKET_POLL_MS == 100ms, sock->retries allows for timeouts up to 13 years.
// if timeout_ms == UINT64_MAX, wait forever.
sock->retries = (timeout_ms == UINT64_MAX) ? UINT_MAX : timeout_ms * 1000 / SOCKET_POLL_US;
struct timeval timeout = {
.tv_sec = 0,
.tv_usec = timeout_ms ? SOCKET_POLL_US : 0
};
lwip_setsockopt(sock->fd, SOL_SOCKET, SO_SNDTIMEO, (const void *)&timeout, sizeof(timeout));
lwip_setsockopt(sock->fd, SOL_SOCKET, SO_RCVTIMEO, (const void *)&timeout, sizeof(timeout));
lwip_fcntl(sock->fd, F_SETFL, timeout_ms ? 0 : O_NONBLOCK);
}
STATIC mp_obj_t socket_settimeout(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
if (arg1 == mp_const_none) {
_socket_settimeout(self, UINT64_MAX);
} else {
#if MICROPY_PY_BUILTINS_FLOAT
_socket_settimeout(self, (uint64_t)(mp_obj_get_float(arg1) * MICROPY_FLOAT_CONST(1000.0)));
#else
_socket_settimeout(self, mp_obj_get_int(arg1) * 1000);
#endif
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_settimeout_obj, socket_settimeout);
STATIC mp_obj_t socket_setblocking(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
if (mp_obj_is_true(arg1)) {
_socket_settimeout(self, UINT64_MAX);
} else {
_socket_settimeout(self, 0);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);
// XXX this can end up waiting a very long time if the content is dribbled in one character
// at a time, as the timeout resets each time a recvfrom succeeds ... this is probably not
// good behaviour.
STATIC mp_uint_t _socket_read_data(mp_obj_t self_in, void *buf, size_t size,
struct sockaddr *from, socklen_t *from_len, int *errcode) {
socket_obj_t *sock = MP_OBJ_TO_PTR(self_in);
// A new socket cannot be read from.
if (sock->state == SOCKET_STATE_NEW) {
*errcode = MP_ENOTCONN;
return MP_STREAM_ERROR;
}
// If the peer closed the connection then the lwIP socket API will only return "0" once
// from lwip_recvfrom and then block on subsequent calls. To emulate POSIX behaviour,
// which continues to return "0" for each call on a closed socket, we set a flag when
// the peer closed the socket.
if (sock->state == SOCKET_STATE_PEER_CLOSED) {
return 0;
}
// XXX Would be nicer to use RTC to handle timeouts
for (int i = 0; i <= sock->retries; ++i) {
// Poll the socket to see if it has waiting data and only release the GIL if it doesn't.
// This ensures higher performance in the case of many small reads, eg for readline.
bool release_gil;
{
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(sock->fd, &rfds);
struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 };
int r = select(sock->fd + 1, &rfds, NULL, NULL, &timeout);
release_gil = r != 1;
}
if (release_gil) {
MP_THREAD_GIL_EXIT();
}
int r = lwip_recvfrom(sock->fd, buf, size, 0, from, from_len);
if (release_gil) {
MP_THREAD_GIL_ENTER();
}
if (r == 0) {
sock->state = SOCKET_STATE_PEER_CLOSED;
}
if (r >= 0) {
return r;
}
if (errno != EWOULDBLOCK) {
*errcode = errno;
return MP_STREAM_ERROR;
}
check_for_exceptions();
}
*errcode = sock->retries == 0 ? MP_EWOULDBLOCK : MP_ETIMEDOUT;
return MP_STREAM_ERROR;
}
mp_obj_t _socket_recvfrom(mp_obj_t self_in, mp_obj_t len_in,
struct sockaddr *from, socklen_t *from_len) {
size_t len = mp_obj_get_int(len_in);
vstr_t vstr;
vstr_init_len(&vstr, len);
int errcode;
mp_uint_t ret = _socket_read_data(self_in, vstr.buf, len, from, from_len, &errcode);
if (ret == MP_STREAM_ERROR) {
mp_raise_OSError(errcode);
}
vstr.len = ret;
return mp_obj_new_bytes_from_vstr(&vstr);
}
STATIC mp_obj_t socket_recv(mp_obj_t self_in, mp_obj_t len_in) {
return _socket_recvfrom(self_in, len_in, NULL, NULL);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_recv_obj, socket_recv);
STATIC mp_obj_t socket_recvfrom(mp_obj_t self_in, mp_obj_t len_in) {
struct sockaddr from;
socklen_t fromlen = sizeof(from);
mp_obj_t tuple[2];
tuple[0] = _socket_recvfrom(self_in, len_in, &from, &fromlen);
uint8_t *ip = (uint8_t *)&((struct sockaddr_in *)&from)->sin_addr;
mp_uint_t port = lwip_ntohs(((struct sockaddr_in *)&from)->sin_port);
tuple[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
return mp_obj_new_tuple(2, tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_recvfrom_obj, socket_recvfrom);
int _socket_send(socket_obj_t *sock, const char *data, size_t datalen) {
int sentlen = 0;
for (int i = 0; i <= sock->retries && sentlen < datalen; i++) {
MP_THREAD_GIL_EXIT();
int r = lwip_write(sock->fd, data + sentlen, datalen - sentlen);
MP_THREAD_GIL_ENTER();
// lwip returns EINPROGRESS when trying to send right after a non-blocking connect
if (r < 0 && errno != EWOULDBLOCK && errno != EINPROGRESS) {
mp_raise_OSError(errno);
}
if (r > 0) {
sentlen += r;
}
check_for_exceptions();
}
if (sentlen == 0) {
mp_raise_OSError(sock->retries == 0 ? MP_EWOULDBLOCK : MP_ETIMEDOUT);
}
return sentlen;
}
STATIC mp_obj_t socket_send(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *sock = MP_OBJ_TO_PTR(arg0);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(arg1, &bufinfo, MP_BUFFER_READ);
int r = _socket_send(sock, bufinfo.buf, bufinfo.len);
return mp_obj_new_int(r);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_send_obj, socket_send);
STATIC mp_obj_t socket_sendall(const mp_obj_t arg0, const mp_obj_t arg1) {
// XXX behaviour when nonblocking (see extmod/modlwip.c)
// XXX also timeout behaviour.
socket_obj_t *sock = MP_OBJ_TO_PTR(arg0);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(arg1, &bufinfo, MP_BUFFER_READ);
int r = _socket_send(sock, bufinfo.buf, bufinfo.len);
if (r < bufinfo.len) {
mp_raise_OSError(MP_ETIMEDOUT);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_sendall_obj, socket_sendall);
STATIC mp_obj_t socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_in) {
socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
// get the buffer to send
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
// create the destination address
struct sockaddr_in to;
to.sin_len = sizeof(to);
to.sin_family = AF_INET;
to.sin_port = lwip_htons(netutils_parse_inet_addr(addr_in, (uint8_t *)&to.sin_addr, NETUTILS_BIG));
// send the data
for (int i = 0; i <= self->retries; i++) {
MP_THREAD_GIL_EXIT();
int ret = lwip_sendto(self->fd, bufinfo.buf, bufinfo.len, 0, (struct sockaddr *)&to, sizeof(to));
MP_THREAD_GIL_ENTER();
if (ret > 0) {
return mp_obj_new_int_from_uint(ret);
}
if (ret == -1 && errno != EWOULDBLOCK) {
mp_raise_OSError(errno);
}
check_for_exceptions();
}
mp_raise_OSError(MP_ETIMEDOUT);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(socket_sendto_obj, socket_sendto);
STATIC mp_obj_t socket_fileno(const mp_obj_t arg0) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
return mp_obj_new_int(self->fd);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_fileno_obj, socket_fileno);
STATIC mp_obj_t socket_makefile(size_t n_args, const mp_obj_t *args) {
(void)n_args;
return args[0];
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile);
STATIC mp_uint_t socket_stream_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
return _socket_read_data(self_in, buf, size, NULL, NULL, errcode);
}
STATIC mp_uint_t socket_stream_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
socket_obj_t *sock = self_in;
for (int i = 0; i <= sock->retries; i++) {
MP_THREAD_GIL_EXIT();
int r = lwip_write(sock->fd, buf, size);
MP_THREAD_GIL_ENTER();
if (r > 0) {
return r;
}
// lwip returns MP_EINPROGRESS when trying to write right after a non-blocking connect
if (r < 0 && errno != EWOULDBLOCK && errno != EINPROGRESS) {
*errcode = errno;
return MP_STREAM_ERROR;
}
check_for_exceptions();
}
*errcode = sock->retries == 0 ? MP_EWOULDBLOCK : MP_ETIMEDOUT;
return MP_STREAM_ERROR;
}
STATIC mp_uint_t socket_stream_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
socket_obj_t *socket = self_in;
if (request == MP_STREAM_POLL) {
if (socket->fd == -1) {
return MP_STREAM_POLL_NVAL;
}
fd_set rfds;
FD_ZERO(&rfds);
fd_set wfds;
FD_ZERO(&wfds);
fd_set efds;
FD_ZERO(&efds);
struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 };
if (arg & MP_STREAM_POLL_RD) {
FD_SET(socket->fd, &rfds);
}
if (arg & MP_STREAM_POLL_WR) {
FD_SET(socket->fd, &wfds);
}
if (arg & MP_STREAM_POLL_HUP) {
FD_SET(socket->fd, &efds);
}
int r = select((socket->fd) + 1, &rfds, &wfds, &efds, &timeout);
if (r < 0) {
*errcode = MP_EIO;
return MP_STREAM_ERROR;
}
mp_uint_t ret = 0;
if (FD_ISSET(socket->fd, &rfds)) {
ret |= MP_STREAM_POLL_RD;
}
if (FD_ISSET(socket->fd, &wfds)) {
ret |= MP_STREAM_POLL_WR;
}
if (FD_ISSET(socket->fd, &efds)) {
ret |= MP_STREAM_POLL_HUP;
}
// New (unconnected) sockets are writable and have HUP set.
if (socket->state == SOCKET_STATE_NEW) {
ret |= (arg & MP_STREAM_POLL_WR) | MP_STREAM_POLL_HUP;
}
return ret;
} else if (request == MP_STREAM_CLOSE) {
if (socket->fd >= 0) {
#if MICROPY_PY_SOCKET_EVENTS
if (socket->events_callback != MP_OBJ_NULL) {
socket_events_remove(socket);
socket->events_callback = MP_OBJ_NULL;
}
#endif
int ret = lwip_close(socket->fd);
if (ret != 0) {
*errcode = errno;
return MP_STREAM_ERROR;
}
socket->fd = -1;
}
return 0;
}
*errcode = MP_EINVAL;
return MP_STREAM_ERROR;
}
STATIC const mp_rom_map_elem_t socket_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_stream_close_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
{ MP_ROM_QSTR(MP_QSTR_bind), MP_ROM_PTR(&socket_bind_obj) },
{ MP_ROM_QSTR(MP_QSTR_listen), MP_ROM_PTR(&socket_listen_obj) },
{ MP_ROM_QSTR(MP_QSTR_accept), MP_ROM_PTR(&socket_accept_obj) },
{ MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&socket_connect_obj) },
{ MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&socket_send_obj) },
{ MP_ROM_QSTR(MP_QSTR_sendall), MP_ROM_PTR(&socket_sendall_obj) },
{ MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socket_sendto_obj) },
{ MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&socket_recv_obj) },
{ MP_ROM_QSTR(MP_QSTR_recvfrom), MP_ROM_PTR(&socket_recvfrom_obj) },
{ MP_ROM_QSTR(MP_QSTR_setsockopt), MP_ROM_PTR(&socket_setsockopt_obj) },
{ MP_ROM_QSTR(MP_QSTR_settimeout), MP_ROM_PTR(&socket_settimeout_obj) },
{ MP_ROM_QSTR(MP_QSTR_setblocking), MP_ROM_PTR(&socket_setblocking_obj) },
{ MP_ROM_QSTR(MP_QSTR_makefile), MP_ROM_PTR(&socket_makefile_obj) },
{ MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&socket_fileno_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
};
STATIC MP_DEFINE_CONST_DICT(socket_locals_dict, socket_locals_dict_table);
STATIC const mp_stream_p_t socket_stream_p = {
.read = socket_stream_read,
.write = socket_stream_write,
.ioctl = socket_stream_ioctl
};
STATIC MP_DEFINE_CONST_OBJ_TYPE(
socket_type,
MP_QSTR_socket,
MP_TYPE_FLAG_NONE,
make_new, socket_make_new,
protocol, &socket_stream_p,
locals_dict, &socket_locals_dict
);
STATIC mp_obj_t esp_socket_getaddrinfo(size_t n_args, const mp_obj_t *args) {
// TODO support additional args beyond the first two
struct addrinfo *res = NULL;
_socket_getaddrinfo2(args[0], args[1], &res);
mp_obj_t ret_list = mp_obj_new_list(0, NULL);
for (struct addrinfo *resi = res; resi; resi = resi->ai_next) {
mp_obj_t addrinfo_objs[5] = {
mp_obj_new_int(resi->ai_family),
mp_obj_new_int(resi->ai_socktype),
mp_obj_new_int(resi->ai_protocol),
mp_obj_new_str(resi->ai_canonname, strlen(resi->ai_canonname)),
mp_const_none
};
if (resi->ai_family == AF_INET) {
struct sockaddr_in *addr = (struct sockaddr_in *)resi->ai_addr;
// This looks odd, but it's really just a u32_t
ip4_addr_t ip4_addr = { .addr = addr->sin_addr.s_addr };
char buf[16];
ip4addr_ntoa_r(&ip4_addr, buf, sizeof(buf));
mp_obj_t inaddr_objs[2] = {
mp_obj_new_str(buf, strlen(buf)),
mp_obj_new_int(ntohs(addr->sin_port))
};
addrinfo_objs[4] = mp_obj_new_tuple(2, inaddr_objs);
}
mp_obj_list_append(ret_list, mp_obj_new_tuple(5, addrinfo_objs));
}
if (res) {
lwip_freeaddrinfo(res);
}
return ret_list;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(esp_socket_getaddrinfo_obj, 2, 6, esp_socket_getaddrinfo);
STATIC mp_obj_t esp_socket_initialize() {
static int initialized = 0;
if (!initialized) {
ESP_LOGI(TAG, "Initializing");
esp_netif_init();
initialized = 1;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(esp_socket_initialize_obj, esp_socket_initialize);
STATIC const mp_rom_map_elem_t mp_module_socket_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_socket) },
{ MP_ROM_QSTR(MP_QSTR___init__), MP_ROM_PTR(&esp_socket_initialize_obj) },
{ MP_ROM_QSTR(MP_QSTR_socket), MP_ROM_PTR(&socket_type) },
{ MP_ROM_QSTR(MP_QSTR_getaddrinfo), MP_ROM_PTR(&esp_socket_getaddrinfo_obj) },
{ MP_ROM_QSTR(MP_QSTR_AF_INET), MP_ROM_INT(AF_INET) },
{ MP_ROM_QSTR(MP_QSTR_AF_INET6), MP_ROM_INT(AF_INET6) },
{ MP_ROM_QSTR(MP_QSTR_SOCK_STREAM), MP_ROM_INT(SOCK_STREAM) },
{ MP_ROM_QSTR(MP_QSTR_SOCK_DGRAM), MP_ROM_INT(SOCK_DGRAM) },
{ MP_ROM_QSTR(MP_QSTR_SOCK_RAW), MP_ROM_INT(SOCK_RAW) },
{ MP_ROM_QSTR(MP_QSTR_IPPROTO_TCP), MP_ROM_INT(IPPROTO_TCP) },
{ MP_ROM_QSTR(MP_QSTR_IPPROTO_UDP), MP_ROM_INT(IPPROTO_UDP) },
{ MP_ROM_QSTR(MP_QSTR_IPPROTO_IP), MP_ROM_INT(IPPROTO_IP) },
{ MP_ROM_QSTR(MP_QSTR_SOL_SOCKET), MP_ROM_INT(SOL_SOCKET) },
{ MP_ROM_QSTR(MP_QSTR_SO_REUSEADDR), MP_ROM_INT(SO_REUSEADDR) },
{ MP_ROM_QSTR(MP_QSTR_SO_BROADCAST), MP_ROM_INT(SO_BROADCAST) },
{ MP_ROM_QSTR(MP_QSTR_SO_BINDTODEVICE), MP_ROM_INT(SO_BINDTODEVICE) },
{ MP_ROM_QSTR(MP_QSTR_IP_ADD_MEMBERSHIP), MP_ROM_INT(IP_ADD_MEMBERSHIP) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_socket_globals, mp_module_socket_globals_table);
const mp_obj_module_t mp_module_socket = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&mp_module_socket_globals,
};
// Note: This port doesn't define MICROPY_PY_SOCKET or MICROPY_PY_LWIP so
// this will not conflict with the common implementation provided by
// extmod/mod{lwip,socket}.c.
MP_REGISTER_EXTENSIBLE_MODULE(MP_QSTR_socket, mp_module_socket);
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