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6681eb809a
circuitpython/ports/esp32/modsocket.c
Damien George 6681eb809a esp32/modsocket: Correctly handle reading from a peer-closed socket. 
If a socket is cleanly shut down by the peer then reads on this socket
should continue to return zero bytes.  The lwIP socket API does not have
this behaviour (it only returns zero once, then blocks on subsequent calls)
so this patch adds explicit checks and logic for peer closed sockets.
2018-05-02 22:31:00 +10:00

707 lines
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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/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 "lib/netutils/netutils.h"
#include "tcpip_adapter.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)
typedef struct _socket_obj_t {
mp_obj_base_t base;
int fd;
uint8_t domain;
uint8_t type;
uint8_t proto;
bool peer_closed;
unsigned int retries;
#if MICROPY_PY_USOCKET_EVENTS
mp_obj_t events_callback;
struct _socket_obj_t *events_next;
#endif
} socket_obj_t;
void _socket_settimeout(socket_obj_t *sock, uint64_t timeout_ms);
#if MICROPY_PY_USOCKET_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 usocket_events_divisor;
STATIC socket_obj_t *usocket_events_head;
void usocket_events_deinit(void) {
usocket_events_head = NULL;
}
// Assumes the socket is not already in the linked list, and adds it
STATIC void usocket_events_add(socket_obj_t *sock) {
sock->events_next = usocket_events_head;
usocket_events_head = sock;
}
// Assumes the socket is already in the linked list, and removes it
STATIC void usocket_events_remove(socket_obj_t *sock) {
for (socket_obj_t **s = &usocket_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 usocket_events_handler(void) {
if (usocket_events_head == NULL) {
return;
}
if (--usocket_events_divisor) {
return;
}
usocket_events_divisor = USOCKET_EVENTS_DIVISOR;
fd_set rfds;
FD_ZERO(&rfds);
int max_fd = 0;
for (socket_obj_t *s = usocket_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 = usocket_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_USOCKET_EVENTS
NORETURN static void exception_from_errno(int _errno) {
// Here we need to convert from lwip errno values to MicroPython's standard ones
if (_errno == EINPROGRESS) {
_errno = MP_EINPROGRESS;
}
mp_raise_OSError(_errno);
}
void check_for_exceptions() {
mp_obj_t exc = MP_STATE_VM(mp_pending_exception);
if (exc != MP_OBJ_NULL) {
MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
nlr_raise(exc);
}
}
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_SMALL_INT(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 = lwip_getaddrinfo(host_str, port_str, &hints, resp);
MP_THREAD_GIL_ENTER();
return res;
}
int _socket_getaddrinfo(const mp_obj_t addrtuple, struct addrinfo **resp) {
mp_uint_t len = 0;
mp_obj_t *elem;
mp_obj_get_array(addrtuple, &len, &elem);
if (len != 2) return -1;
return _socket_getaddrinfo2(elem[0], elem[1], resp);
}
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);
int r = lwip_bind_r(self->fd, res->ai_addr, res->ai_addrlen);
lwip_freeaddrinfo(res);
if (r < 0) exception_from_errno(errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
STATIC mp_obj_t socket_listen(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
int backlog = mp_obj_get_int(arg1);
int r = lwip_listen_r(self->fd, backlog);
if (r < 0) exception_from_errno(errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, 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_r(self->fd, &addr, &addr_len);
MP_THREAD_GIL_ENTER();
if (new_fd >= 0) break;
if (errno != EAGAIN) exception_from_errno(errno);
check_for_exceptions();
}
if (new_fd < 0) 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->peer_closed = false;
_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;
_socket_getaddrinfo(arg1, &res);
MP_THREAD_GIL_EXIT();
int r = lwip_connect_r(self->fd, res->ai_addr, res->ai_addrlen);
MP_THREAD_GIL_ENTER();
lwip_freeaddrinfo(res);
if (r != 0) {
exception_from_errno(errno);
}
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: {
int val = mp_obj_get_int(args[3]);
int ret = lwip_setsockopt_r(self->fd, SOL_SOCKET, opt, &val, sizeof(int));
if (ret != 0) {
exception_from_errno(errno);
}
break;
}
#if MICROPY_PY_USOCKET_EVENTS
// level: SOL_SOCKET
// special "register callback" option
case 20: {
if (args[3] == mp_const_none) {
if (self->events_callback != MP_OBJ_NULL) {
usocket_events_remove(self);
self->events_callback = MP_OBJ_NULL;
}
} else {
if (self->events_callback == MP_OBJ_NULL) {
usocket_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_r(sock->fd, SOL_SOCKET, SO_SNDTIMEO, (const void *)&timeout, sizeof(timeout));
lwip_setsockopt_r(sock->fd, SOL_SOCKET, SO_RCVTIMEO, (const void *)&timeout, sizeof(timeout));
lwip_fcntl_r(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 _socket_settimeout(self, mp_obj_get_float(arg1) * 1000L);
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);
// If the peer closed the connection then the lwIP socket API will only return "0" once
// from lwip_recvfrom_r 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->peer_closed) {
return 0;
}
// XXX Would be nicer to use RTC to handle timeouts
for (int i = 0; i <= sock->retries; ++i) {
MP_THREAD_GIL_EXIT();
int r = lwip_recvfrom_r(sock->fd, buf, size, 0, from, from_len);
MP_THREAD_GIL_ENTER();
if (r == 0) {
sock->peer_closed = true;
}
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) {
exception_from_errno(errcode);
}
vstr.len = ret;
return mp_obj_new_str_from_vstr(&mp_type_bytes, &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_r(sock->fd, data+sentlen, datalen-sentlen);
MP_THREAD_GIL_ENTER();
if (r < 0 && errno != EWOULDBLOCK) exception_from_errno(errno);
if (r > 0) sentlen += r;
check_for_exceptions();
}
if (sentlen == 0) mp_raise_OSError(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_uint_t datalen;
const char *data = mp_obj_str_get_data(arg1, &datalen);
int r = _socket_send(sock, data, datalen);
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_r(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) {
exception_from_errno(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_r(sock->fd, buf, size);
MP_THREAD_GIL_ENTER();
if (r > 0) return r;
if (r < 0 && errno != EWOULDBLOCK) { *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) {
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;
return ret;
} else if (request == MP_STREAM_CLOSE) {
if (socket->fd >= 0) {
#if MICROPY_PY_USOCKET_EVENTS
if (socket->events_callback != MP_OBJ_NULL) {
usocket_events_remove(socket);
socket->events_callback = MP_OBJ_NULL;
}
#endif
int ret = lwip_close_r(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_map_elem_t socket_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___del__), (mp_obj_t)&mp_stream_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&mp_stream_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_bind), (mp_obj_t)&socket_bind_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_listen), (mp_obj_t)&socket_listen_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_accept), (mp_obj_t)&socket_accept_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_connect), (mp_obj_t)&socket_connect_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&socket_send_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sendall), (mp_obj_t)&socket_sendall_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sendto), (mp_obj_t)&socket_sendto_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&socket_recv_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_recvfrom), (mp_obj_t)&socket_recvfrom_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_setsockopt), (mp_obj_t)&socket_setsockopt_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_settimeout), (mp_obj_t)&socket_settimeout_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_setblocking), (mp_obj_t)&socket_setblocking_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_makefile), (mp_obj_t)&socket_makefile_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_fileno), (mp_obj_t)&socket_fileno_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readinto), (mp_obj_t)&mp_stream_readinto_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&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 const mp_obj_type_t socket_type = {
{ &mp_type_type },
.name = MP_QSTR_socket,
.protocol = &socket_stream_p,
.locals_dict = (mp_obj_t)&socket_locals_dict,
};
STATIC mp_obj_t get_socket(size_t n_args, const mp_obj_t *args) {
socket_obj_t *sock = m_new_obj_with_finaliser(socket_obj_t);
sock->base.type = &socket_type;
sock->domain = AF_INET;
sock->type = SOCK_STREAM;
sock->proto = 0;
sock->peer_closed = false;
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->fd = lwip_socket(sock->domain, sock->type, sock->proto);
if (sock->fd < 0) {
exception_from_errno(errno);
}
_socket_settimeout(sock, UINT64_MAX);
return MP_OBJ_FROM_PTR(sock);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(get_socket_obj, 0, 3, get_socket);
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("modsocket", "Initializing");
tcpip_adapter_init();
initialized = 1;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(esp_socket_initialize_obj, esp_socket_initialize);
STATIC const mp_map_elem_t mp_module_socket_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_usocket) },
{ MP_OBJ_NEW_QSTR(MP_QSTR___init__), (mp_obj_t)&esp_socket_initialize_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_socket), (mp_obj_t)&get_socket_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_getaddrinfo), (mp_obj_t)&esp_socket_getaddrinfo_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET), MP_OBJ_NEW_SMALL_INT(AF_INET) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET6), MP_OBJ_NEW_SMALL_INT(AF_INET6) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_STREAM), MP_OBJ_NEW_SMALL_INT(SOCK_STREAM) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_DGRAM), MP_OBJ_NEW_SMALL_INT(SOCK_DGRAM) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_RAW), MP_OBJ_NEW_SMALL_INT(SOCK_RAW) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_TCP), MP_OBJ_NEW_SMALL_INT(IPPROTO_TCP) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_UDP), MP_OBJ_NEW_SMALL_INT(IPPROTO_UDP) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_IP), MP_OBJ_NEW_SMALL_INT(IPPROTO_IP) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOL_SOCKET), MP_OBJ_NEW_SMALL_INT(SOL_SOCKET) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SO_REUSEADDR), MP_OBJ_NEW_SMALL_INT(SO_REUSEADDR) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IP_ADD_MEMBERSHIP), MP_OBJ_NEW_SMALL_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_usocket = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&mp_module_socket_globals,
};
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