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micropython/extmod/modlwip.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* 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 <string.h>
#include <errno.h>
#include <stdio.h>
#include "py/nlr.h"
#include "py/objlist.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "py/mphal.h"
#include "netutils.h"
#include "lwip/init.h"
#include "lwip/timers.h"
#include "lwip/tcp.h"
#include "lwip/udp.h"
//#include "lwip/raw.h"
#include "lwip/dns.h"
#ifdef MICROPY_PY_LWIP_SLIP
#include "netif/slipif.h"
#include "lwip/sio.h"
#endif
#ifdef MICROPY_PY_LWIP_SLIP
/******************************************************************************/
// Slip object for modlwip. Requires a serial driver for the port that supports
// the lwip serial callback functions.
typedef struct _lwip_slip_obj_t {
mp_obj_base_t base;
struct netif lwip_netif;
} lwip_slip_obj_t;
// Slip object is unique for now. Possibly can fix this later. FIXME
STATIC lwip_slip_obj_t lwip_slip_obj;
// Declare these early.
void mod_lwip_register_poll(void (*poll)(void *arg), void *poll_arg);
void mod_lwip_deregister_poll(void (*poll)(void *arg), void *poll_arg);
STATIC void slip_lwip_poll(void *netif) {
slipif_poll((struct netif*)netif);
}
STATIC const mp_obj_type_t lwip_slip_type;
// lwIP SLIP callback functions
sio_fd_t sio_open(u8_t dvnum) {
// We support singleton SLIP interface, so just return any truish value.
return (sio_fd_t)1;
}
void sio_send(u8_t c, sio_fd_t fd) {
mp_obj_type_t *type = mp_obj_get_type(MP_STATE_VM(lwip_slip_stream));
int error;
type->stream_p->write(MP_STATE_VM(lwip_slip_stream), &c, 1, &error);
}
u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len) {
mp_obj_type_t *type = mp_obj_get_type(MP_STATE_VM(lwip_slip_stream));
int error;
mp_uint_t out_sz = type->stream_p->read(MP_STATE_VM(lwip_slip_stream), data, len, &error);
if (out_sz == MP_STREAM_ERROR) {
if (mp_is_nonblocking_error(error)) {
return 0;
}
// Can't do much else, can we?
return 0;
}
return out_sz;
}
// constructor lwip.slip(device=integer, iplocal=string, ipremote=string)
STATIC mp_obj_t lwip_slip_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 3, 3, false);
lwip_slip_obj.base.type = &lwip_slip_type;
MP_STATE_VM(lwip_slip_stream) = args[0];
ip_addr_t iplocal, ipremote;
if (!ipaddr_aton(mp_obj_str_get_str(args[1]), &iplocal)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "not a valid local IP"));
}
if (!ipaddr_aton(mp_obj_str_get_str(args[2]), &ipremote)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "not a valid remote IP"));
}
struct netif *n = &lwip_slip_obj.lwip_netif;
if (netif_add(n, &iplocal, IP_ADDR_BROADCAST, &ipremote, NULL, slipif_init, ip_input) == NULL) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "out of memory"));
}
netif_set_up(n);
netif_set_default(n);
mod_lwip_register_poll(slip_lwip_poll, n);
return (mp_obj_t)&lwip_slip_obj;
}
STATIC mp_obj_t lwip_slip_status(mp_obj_t self_in) {
// Null function for now.
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(lwip_slip_status_obj, lwip_slip_status);
STATIC const mp_map_elem_t lwip_slip_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_status), (mp_obj_t)&lwip_slip_status_obj },
};
STATIC MP_DEFINE_CONST_DICT(lwip_slip_locals_dict, lwip_slip_locals_dict_table);
STATIC const mp_obj_type_t lwip_slip_type = {
{ &mp_type_type },
.name = MP_QSTR_slip,
.make_new = lwip_slip_make_new,
.locals_dict = (mp_obj_t)&lwip_slip_locals_dict,
};
#endif // MICROPY_PY_LWIP_SLIP
/******************************************************************************/
// Table to convert lwIP err_t codes to socket errno codes, from the lwIP
// socket API.
// Extension to lwIP error codes
#define _ERR_BADF -16
static const int error_lookup_table[] = {
0, /* ERR_OK 0 No error, everything OK. */
ENOMEM, /* ERR_MEM -1 Out of memory error. */
ENOBUFS, /* ERR_BUF -2 Buffer error. */
EWOULDBLOCK, /* ERR_TIMEOUT -3 Timeout */
EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */
EINPROGRESS, /* ERR_INPROGRESS -5 Operation in progress */
EINVAL, /* ERR_VAL -6 Illegal value. */
EWOULDBLOCK, /* ERR_WOULDBLOCK -7 Operation would block. */
EADDRINUSE, /* ERR_USE -8 Address in use. */
EALREADY, /* ERR_ISCONN -9 Already connected. */
ECONNABORTED, /* ERR_ABRT -10 Connection aborted. */
ECONNRESET, /* ERR_RST -11 Connection reset. */
ENOTCONN, /* ERR_CLSD -12 Connection closed. */
ENOTCONN, /* ERR_CONN -13 Not connected. */
EIO, /* ERR_ARG -14 Illegal argument. */
-1, /* ERR_IF -15 Low-level netif error */
EBADF, /* _ERR_BADF -16 Closed socket (null pcb) */
};
/*******************************************************************************/
// The socket object provided by lwip.socket.
#define MOD_NETWORK_AF_INET (2)
#define MOD_NETWORK_AF_INET6 (10)
#define MOD_NETWORK_SOCK_STREAM (1)
#define MOD_NETWORK_SOCK_DGRAM (2)
#define MOD_NETWORK_SOCK_RAW (3)
typedef struct _lwip_socket_obj_t {
mp_obj_base_t base;
volatile union {
struct tcp_pcb *tcp;
struct udp_pcb *udp;
} pcb;
volatile union {
struct pbuf *pbuf;
struct tcp_pcb *connection;
} incoming;
byte peer[4];
mp_uint_t peer_port;
mp_uint_t timeout;
uint16_t leftover_count;
uint8_t domain;
uint8_t type;
#define STATE_NEW 0
#define STATE_CONNECTING 1
#define STATE_CONNECTED 2
#define STATE_PEER_CLOSED 3
// Negative value is lwIP error
int8_t state;
} lwip_socket_obj_t;
static inline void poll_sockets(void) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK;
#else
mp_hal_delay_ms(1);
#endif
}
/*******************************************************************************/
// Callback functions for the lwIP raw API.
// Callback for incoming UDP packets. We simply stash the packet and the source address,
// in case we need it for recvfrom.
STATIC void _lwip_udp_incoming(void *arg, struct udp_pcb *upcb, struct pbuf *p, ip_addr_t *addr, u16_t port) {
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
if (socket->incoming.pbuf != NULL) {
// That's why they call it "unreliable". No room in the inn, drop the packet.
pbuf_free(p);
} else {
socket->incoming.pbuf = p;
socket->peer_port = (mp_uint_t)port;
memcpy(&socket->peer, addr, sizeof(socket->peer));
}
}
// Callback for general tcp errors.
STATIC void _lwip_tcp_error(void *arg, err_t err) {
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
// Pass the error code back via the connection variable.
socket->state = err;
// If we got here, the lwIP stack either has deallocated or will deallocate the pcb.
socket->pcb.tcp = NULL;
}
// Callback for tcp connection requests. Error code err is unused. (See tcp.h)
STATIC err_t _lwip_tcp_connected(void *arg, struct tcp_pcb *tpcb, err_t err) {
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
socket->state = STATE_CONNECTED;
return ERR_OK;
}
// Callback for incoming tcp connections.
STATIC err_t _lwip_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err) {
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
if (socket->incoming.connection != NULL) {
// We need to handle this better. This single-level structure makes the
// backlog setting kind of pointless. FIXME
return ERR_BUF;
} else {
socket->incoming.connection = newpcb;
return ERR_OK;
}
}
// Callback for inbound tcp packets.
STATIC err_t _lwip_tcp_recv(void *arg, struct tcp_pcb *tcpb, struct pbuf *p, err_t err) {
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
if (p == NULL) {
// Other side has closed connection.
socket->state = STATE_PEER_CLOSED;
return ERR_OK;
} else if (socket->incoming.pbuf != NULL) {
// No room in the inn, let LWIP know it's still responsible for delivery later
return ERR_BUF;
}
socket->incoming.pbuf = p;
return ERR_OK;
}
/*******************************************************************************/
// Functions for socket send/recieve operations. Socket send/recv and friends call
// these to do the work.
// Helper function for send/sendto to handle UDP packets.
STATIC mp_uint_t lwip_udp_send(lwip_socket_obj_t *socket, const byte *buf, mp_uint_t len, byte *ip, mp_uint_t port, int *_errno) {
if (len > 0xffff) {
// Any packet that big is probably going to fail the pbuf_alloc anyway, but may as well try
len = 0xffff;
}
// FIXME: maybe PBUF_ROM?
struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
if (p == NULL) {
*_errno = ENOMEM;
return -1;
}
memcpy(p->payload, buf, len);
err_t err;
if (ip == NULL) {
err = udp_send(socket->pcb.udp, p);
} else {
ip_addr_t dest;
IP4_ADDR(&dest, ip[0], ip[1], ip[2], ip[3]);
err = udp_sendto(socket->pcb.udp, p, &dest, port);
}
pbuf_free(p);
if (err != ERR_OK) {
*_errno = error_lookup_table[-err];
return -1;
}
return len;
}
// Helper function for recv/recvfrom to handle UDP packets
STATIC mp_uint_t lwip_udp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_t len, byte *ip, mp_uint_t *port, int *_errno) {
if (socket->incoming.pbuf == NULL) {
if (socket->timeout != -1) {
for (mp_uint_t retries = socket->timeout / 100; retries--;) {
mp_hal_delay_ms(100);
if (socket->incoming.pbuf != NULL) break;
}
if (socket->incoming.pbuf == NULL) {
*_errno = ETIMEDOUT;
return -1;
}
} else {
while (socket->incoming.pbuf == NULL) {
poll_sockets();
}
}
}
if (ip != NULL) {
memcpy(ip, &socket->peer, sizeof(socket->peer));
*port = socket->peer_port;
}
struct pbuf *p = socket->incoming.pbuf;
u16_t result = pbuf_copy_partial(p, buf, ((p->tot_len > len) ? len : p->tot_len), 0);
pbuf_free(p);
socket->incoming.pbuf = NULL;
return (mp_uint_t) result;
}
// Helper function for send/sendto to handle TCP packets
STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_uint_t len, int *_errno) {
u16_t available = tcp_sndbuf(socket->pcb.tcp);
u16_t write_len = MIN(available, len);
err_t err = tcp_write(socket->pcb.tcp, buf, write_len, TCP_WRITE_FLAG_COPY);
if (err != ERR_OK) {
*_errno = error_lookup_table[-err];
return -1;
}
return write_len;
}
// Helper function for recv/recvfrom to handle TCP packets
STATIC mp_uint_t lwip_tcp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_t len, int *_errno) {
if (socket->incoming.pbuf == NULL) {
// Non-blocking socket
if (socket->timeout == 0) {
*_errno = EAGAIN;
return -1;
}
mp_uint_t start = mp_hal_ticks_ms();
while (socket->state == STATE_CONNECTED && socket->incoming.pbuf == NULL) {
if (socket->timeout != -1 && mp_hal_ticks_ms() - start > socket->timeout) {
*_errno = ETIMEDOUT;
return -1;
}
poll_sockets();
}
if (socket->state == STATE_PEER_CLOSED) {
if (socket->incoming.pbuf == NULL) {
// socket closed and no data left in buffer
return 0;
}
} else if (socket->state != STATE_CONNECTED) {
assert(socket->state < 0);
*_errno = error_lookup_table[-socket->state];
return -1;
}
}
struct pbuf *p = socket->incoming.pbuf;
if (socket->leftover_count == 0) {
socket->leftover_count = p->tot_len;
}
u16_t result = pbuf_copy_partial(p, buf, ((socket->leftover_count >= len) ? len : socket->leftover_count), (p->tot_len - socket->leftover_count));
if (socket->leftover_count > len) {
// More left over...
socket->leftover_count -= len;
} else {
pbuf_free(p);
socket->incoming.pbuf = NULL;
socket->leftover_count = 0;
}
tcp_recved(socket->pcb.tcp, result);
return (mp_uint_t) result;
}
/*******************************************************************************/
// The socket functions provided by lwip.socket.
STATIC const mp_obj_type_t lwip_socket_type;
STATIC void lwip_socket_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
lwip_socket_obj_t *self = self_in;
mp_printf(print, "<socket state=%d timeout=%d incoming=%p remaining=%d>", self->state, self->timeout,
self->incoming.pbuf, self->leftover_count);
}
// FIXME: Only supports two arguments at present
STATIC mp_obj_t lwip_socket_make_new(const mp_obj_type_t *type, mp_uint_t n_args,
mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 4, false);
lwip_socket_obj_t *socket = m_new_obj_with_finaliser(lwip_socket_obj_t);
socket->base.type = (mp_obj_t)&lwip_socket_type;
socket->domain = MOD_NETWORK_AF_INET;
socket->type = MOD_NETWORK_SOCK_STREAM;
if (n_args >= 1) {
socket->domain = mp_obj_get_int(args[0]);
if (n_args >= 2) {
socket->type = mp_obj_get_int(args[1]);
}
}
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: socket->pcb.tcp = tcp_new(); break;
case MOD_NETWORK_SOCK_DGRAM: socket->pcb.udp = udp_new(); break;
//case MOD_NETWORK_SOCK_RAW: socket->pcb.raw = raw_new(); break;
default: nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL)));
}
if (socket->pcb.tcp == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(ENOMEM)));
}
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
// Register the socket object as our callback argument.
tcp_arg(socket->pcb.tcp, (void*)socket);
// Register our error callback.
tcp_err(socket->pcb.tcp, _lwip_tcp_error);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
// Register our receive callback now. Since UDP sockets don't require binding or connection
// before use, there's no other good time to do it.
udp_recv(socket->pcb.udp, _lwip_udp_incoming, (void*)socket);
break;
}
}
socket->incoming.pbuf = NULL;
socket->timeout = -1;
socket->state = STATE_NEW;
socket->leftover_count = 0;
return socket;
}
STATIC mp_obj_t lwip_socket_close(mp_obj_t self_in) {
lwip_socket_obj_t *socket = self_in;
bool socket_is_listener = false;
if (socket->pcb.tcp == NULL) {
return mp_const_none;
}
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
if (socket->pcb.tcp->state == LISTEN) {
socket_is_listener = true;
}
if (tcp_close(socket->pcb.tcp) != ERR_OK) {
tcp_abort(socket->pcb.tcp);
}
break;
}
case MOD_NETWORK_SOCK_DGRAM: udp_remove(socket->pcb.udp); break;
//case MOD_NETWORK_SOCK_RAW: raw_remove(socket->pcb.raw); break;
}
socket->pcb.tcp = NULL;
socket->state = _ERR_BADF;
if (socket->incoming.pbuf != NULL) {
if (!socket_is_listener) {
pbuf_free(socket->incoming.pbuf);
} else {
tcp_abort(socket->incoming.connection);
}
socket->incoming.pbuf = NULL;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(lwip_socket_close_obj, lwip_socket_close);
STATIC mp_obj_t lwip_socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
lwip_socket_obj_t *socket = self_in;
uint8_t ip[NETUTILS_IPV4ADDR_BUFSIZE];
mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);
ip_addr_t bind_addr;
IP4_ADDR(&bind_addr, ip[0], ip[1], ip[2], ip[3]);
err_t err = ERR_ARG;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
err = tcp_bind(socket->pcb.tcp, &bind_addr, port);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
err = udp_bind(socket->pcb.udp, &bind_addr, port);
break;
}
}
if (err != ERR_OK) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(error_lookup_table[-err])));
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_bind_obj, lwip_socket_bind);
STATIC mp_obj_t lwip_socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
lwip_socket_obj_t *socket = self_in;
mp_int_t backlog = mp_obj_get_int(backlog_in);
if (socket->pcb.tcp == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EBADF)));
}
if (socket->type != MOD_NETWORK_SOCK_STREAM) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EOPNOTSUPP)));
}
struct tcp_pcb *new_pcb = tcp_listen_with_backlog(socket->pcb.tcp, (u8_t)backlog);
if (new_pcb == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(ENOMEM)));
}
socket->pcb.tcp = new_pcb;
tcp_accept(new_pcb, _lwip_tcp_accept);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_listen_obj, lwip_socket_listen);
STATIC mp_obj_t lwip_socket_accept(mp_obj_t self_in) {
lwip_socket_obj_t *socket = self_in;
if (socket->pcb.tcp == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EBADF)));
}
if (socket->type != MOD_NETWORK_SOCK_STREAM) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EOPNOTSUPP)));
}
// I need to do this because "tcp_accepted", later, is a macro.
struct tcp_pcb *listener = socket->pcb.tcp;
if (listener->state != LISTEN) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL)));
}
// accept incoming connection
if (socket->incoming.connection == NULL) {
if (socket->timeout != -1) {
for (mp_uint_t retries = socket->timeout / 100; retries--;) {
mp_hal_delay_ms(100);
if (socket->incoming.connection != NULL) break;
}
if (socket->incoming.connection == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(ETIMEDOUT)));
}
} else {
while (socket->incoming.connection == NULL) {
poll_sockets();
}
}
}
// create new socket object
lwip_socket_obj_t *socket2 = m_new_obj_with_finaliser(lwip_socket_obj_t);
socket2->base.type = (mp_obj_t)&lwip_socket_type;
// We get a new pcb handle...
socket2->pcb.tcp = socket->incoming.connection;
socket->incoming.connection = NULL;
// ...and set up the new socket for it.
socket2->domain = MOD_NETWORK_AF_INET;
socket2->type = MOD_NETWORK_SOCK_STREAM;
socket2->incoming.pbuf = NULL;
socket2->timeout = socket->timeout;
socket2->state = STATE_CONNECTED;
socket2->leftover_count = 0;
tcp_arg(socket2->pcb.tcp, (void*)socket2);
tcp_err(socket2->pcb.tcp, _lwip_tcp_error);
tcp_recv(socket2->pcb.tcp, _lwip_tcp_recv);
tcp_accepted(listener);
// make the return value
uint8_t ip[NETUTILS_IPV4ADDR_BUFSIZE];
memcpy(ip, &(socket2->pcb.tcp->remote_ip), sizeof(ip));
mp_uint_t port = (mp_uint_t)socket2->pcb.tcp->remote_port;
mp_obj_tuple_t *client = mp_obj_new_tuple(2, NULL);
client->items[0] = socket2;
client->items[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
return client;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(lwip_socket_accept_obj, lwip_socket_accept);
STATIC mp_obj_t lwip_socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
lwip_socket_obj_t *socket = self_in;
if (socket->pcb.tcp == NULL) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EBADF)));
}
// get address
uint8_t ip[NETUTILS_IPV4ADDR_BUFSIZE];
mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);
ip_addr_t dest;
IP4_ADDR(&dest, ip[0], ip[1], ip[2], ip[3]);
err_t err = ERR_ARG;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
if (socket->state != STATE_NEW) {
if (socket->state == STATE_CONNECTED) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EALREADY)));
} else {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINPROGRESS)));
}
}
// Register our recieve callback.
tcp_recv(socket->pcb.tcp, _lwip_tcp_recv);
socket->state = STATE_CONNECTING;
err = tcp_connect(socket->pcb.tcp, &dest, port, _lwip_tcp_connected);
if (err != ERR_OK) {
socket->state = STATE_NEW;
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(error_lookup_table[-err])));
}
socket->peer_port = (mp_uint_t)port;
memcpy(socket->peer, &dest, sizeof(socket->peer));
// And now we wait...
if (socket->timeout != -1) {
for (mp_uint_t retries = socket->timeout / 100; retries--;) {
mp_hal_delay_ms(100);
if (socket->state != STATE_CONNECTING) break;
}
if (socket->state == STATE_CONNECTING) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(ETIMEDOUT)));
}
} else {
while (socket->state == STATE_CONNECTING) {
poll_sockets();
}
}
if (socket->state == STATE_CONNECTED) {
err = ERR_OK;
} else {
err = socket->state;
}
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
err = udp_connect(socket->pcb.udp, &dest, port);
break;
}
}
if (err != ERR_OK) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(error_lookup_table[-err])));
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_connect_obj, lwip_socket_connect);
STATIC void lwip_socket_check_connected(lwip_socket_obj_t *socket) {
if (socket->pcb.tcp == NULL) {
// not connected
int _errno = error_lookup_table[-socket->state];
socket->state = _ERR_BADF;
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
}
}
STATIC mp_obj_t lwip_socket_send(mp_obj_t self_in, mp_obj_t buf_in) {
lwip_socket_obj_t *socket = self_in;
int _errno;
lwip_socket_check_connected(socket);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);
mp_uint_t ret = 0;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
ret = lwip_tcp_send(socket, bufinfo.buf, bufinfo.len, &_errno);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
ret = lwip_udp_send(socket, bufinfo.buf, bufinfo.len, NULL, 0, &_errno);
break;
}
}
if (ret == -1) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
}
return mp_obj_new_int_from_uint(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_send_obj, lwip_socket_send);
STATIC mp_obj_t lwip_socket_recv(mp_obj_t self_in, mp_obj_t len_in) {
lwip_socket_obj_t *socket = self_in;
int _errno;
lwip_socket_check_connected(socket);
mp_int_t len = mp_obj_get_int(len_in);
vstr_t vstr;
vstr_init_len(&vstr, len);
mp_uint_t ret = 0;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
ret = lwip_tcp_receive(socket, (byte*)vstr.buf, len, &_errno);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
ret = lwip_udp_receive(socket, (byte*)vstr.buf, len, NULL, NULL, &_errno);
break;
}
}
if (ret == -1) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
}
if (ret == 0) {
return mp_const_empty_bytes;
}
vstr.len = ret;
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_recv_obj, lwip_socket_recv);
STATIC mp_obj_t lwip_socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_in) {
lwip_socket_obj_t *socket = self_in;
int _errno;
lwip_socket_check_connected(socket);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
uint8_t ip[NETUTILS_IPV4ADDR_BUFSIZE];
mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);
mp_uint_t ret = 0;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
ret = lwip_tcp_send(socket, bufinfo.buf, bufinfo.len, &_errno);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
ret = lwip_udp_send(socket, bufinfo.buf, bufinfo.len, ip, port, &_errno);
break;
}
}
if (ret == -1) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
}
return mp_obj_new_int_from_uint(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(lwip_socket_sendto_obj, lwip_socket_sendto);
STATIC mp_obj_t lwip_socket_recvfrom(mp_obj_t self_in, mp_obj_t len_in) {
lwip_socket_obj_t *socket = self_in;
int _errno;
lwip_socket_check_connected(socket);
mp_int_t len = mp_obj_get_int(len_in);
vstr_t vstr;
vstr_init_len(&vstr, len);
byte ip[4];
mp_uint_t port;
mp_uint_t ret = 0;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM: {
memcpy(ip, &socket->peer, sizeof(socket->peer));
port = (mp_uint_t) socket->peer_port;
ret = lwip_tcp_receive(socket, (byte*)vstr.buf, len, &_errno);
break;
}
case MOD_NETWORK_SOCK_DGRAM: {
ret = lwip_udp_receive(socket, (byte*)vstr.buf, len, ip, &port, &_errno);
break;
}
}
if (ret == -1) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
}
mp_obj_t tuple[2];
if (ret == 0) {
tuple[0] = mp_const_empty_bytes;
} else {
vstr.len = ret;
tuple[0] = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
tuple[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
return mp_obj_new_tuple(2, tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_recvfrom_obj, lwip_socket_recvfrom);
STATIC mp_obj_t lwip_socket_settimeout(mp_obj_t self_in, mp_obj_t timeout_in) {
lwip_socket_obj_t *socket = self_in;
mp_uint_t timeout;
if (timeout_in == mp_const_none) {
timeout = -1;
} else {
#if MICROPY_PY_BUILTIN_FLOAT
timeout = 1000 * mp_obj_get_float(timeout_in);
#else
timeout = 1000 * mp_obj_get_int(timeout_in);
#endif
}
socket->timeout = timeout;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_settimeout_obj, lwip_socket_settimeout);
STATIC mp_obj_t lwip_socket_setblocking(mp_obj_t self_in, mp_obj_t flag_in) {
lwip_socket_obj_t *socket = self_in;
bool val = mp_obj_is_true(flag_in);
if (val) {
socket->timeout = -1;
} else {
socket->timeout = 0;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_setblocking_obj, lwip_socket_setblocking);
STATIC mp_obj_t lwip_socket_setsockopt(mp_uint_t n_args, const mp_obj_t *args) {
(void)n_args; // always 4
printf("Warning: lwip.setsockopt() not implemented\n");
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(lwip_socket_setsockopt_obj, 4, 4, lwip_socket_setsockopt);
STATIC mp_obj_t lwip_socket_makefile(mp_uint_t n_args, const mp_obj_t *args) {
(void)n_args;
return args[0];
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(lwip_socket_makefile_obj, 1, 3, lwip_socket_makefile);
STATIC mp_uint_t lwip_socket_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
lwip_socket_obj_t *socket = self_in;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM:
return lwip_tcp_receive(socket, buf, size, errcode);
case MOD_NETWORK_SOCK_DGRAM:
return lwip_udp_receive(socket, buf, size, NULL, NULL, errcode);
}
// Unreachable
return MP_STREAM_ERROR;
}
STATIC mp_uint_t lwip_socket_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
lwip_socket_obj_t *socket = self_in;
switch (socket->type) {
case MOD_NETWORK_SOCK_STREAM:
return lwip_tcp_send(socket, buf, size, errcode);
case MOD_NETWORK_SOCK_DGRAM:
return lwip_udp_send(socket, buf, size, NULL, 0, errcode);
}
// Unreachable
return MP_STREAM_ERROR;
}
STATIC const mp_map_elem_t lwip_socket_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___del__), (mp_obj_t)&lwip_socket_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&lwip_socket_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_bind), (mp_obj_t)&lwip_socket_bind_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_listen), (mp_obj_t)&lwip_socket_listen_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_accept), (mp_obj_t)&lwip_socket_accept_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_connect), (mp_obj_t)&lwip_socket_connect_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&lwip_socket_send_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&lwip_socket_recv_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sendto), (mp_obj_t)&lwip_socket_sendto_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_recvfrom), (mp_obj_t)&lwip_socket_recvfrom_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_settimeout), (mp_obj_t)&lwip_socket_settimeout_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_setblocking), (mp_obj_t)&lwip_socket_setblocking_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_setsockopt), (mp_obj_t)&lwip_socket_setsockopt_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_makefile), (mp_obj_t)&lwip_socket_makefile_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_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(lwip_socket_locals_dict, lwip_socket_locals_dict_table);
STATIC const mp_stream_p_t lwip_socket_stream_p = {
.read = lwip_socket_read,
.write = lwip_socket_write,
};
STATIC const mp_obj_type_t lwip_socket_type = {
{ &mp_type_type },
.name = MP_QSTR_socket,
.print = lwip_socket_print,
.make_new = lwip_socket_make_new,
.stream_p = &lwip_socket_stream_p,
.locals_dict = (mp_obj_t)&lwip_socket_locals_dict,
};
/******************************************************************************/
// Support functions for memory protection. lwIP has its own memory management
// routines for its internal structures, and since they might be called in
// interrupt handlers, they need some protection.
sys_prot_t sys_arch_protect() {
return (sys_prot_t)MICROPY_BEGIN_ATOMIC_SECTION();
}
void sys_arch_unprotect(sys_prot_t state) {
MICROPY_END_ATOMIC_SECTION((mp_uint_t)state);
}
/******************************************************************************/
// Polling callbacks for the interfaces connected to lwIP. Right now it calls
// itself a "list" but isn't; we only support a single interface.
typedef struct nic_poll {
void (* poll)(void *arg);
void *poll_arg;
} nic_poll_t;
STATIC nic_poll_t lwip_poll_list;
void mod_lwip_register_poll(void (* poll)(void *arg), void *poll_arg) {
lwip_poll_list.poll = poll;
lwip_poll_list.poll_arg = poll_arg;
}
void mod_lwip_deregister_poll(void (* poll)(void *arg), void *poll_arg) {
lwip_poll_list.poll = NULL;
}
/******************************************************************************/
// The lwip global functions.
STATIC mp_obj_t mod_lwip_reset() {
lwip_init();
lwip_poll_list.poll = NULL;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(mod_lwip_reset_obj, mod_lwip_reset);
STATIC mp_obj_t mod_lwip_callback() {
if (lwip_poll_list.poll != NULL) {
lwip_poll_list.poll(lwip_poll_list.poll_arg);
}
sys_check_timeouts();
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(mod_lwip_callback_obj, mod_lwip_callback);
typedef struct _getaddrinfo_state_t {
volatile int status;
volatile ip_addr_t ipaddr;
} getaddrinfo_state_t;
// Callback for incoming DNS requests.
STATIC void lwip_getaddrinfo_cb(const char *name, ip_addr_t *ipaddr, void *arg) {
getaddrinfo_state_t *state = arg;
if (ipaddr != NULL) {
state->status = 1;
state->ipaddr = *ipaddr;
} else {
// error
state->status = -2;
}
}
// lwip.getaddrinfo
STATIC mp_obj_t lwip_getaddrinfo(mp_obj_t host_in, mp_obj_t port_in) {
mp_uint_t hlen;
const char *host = mp_obj_str_get_data(host_in, &hlen);
mp_int_t port = mp_obj_get_int(port_in);
getaddrinfo_state_t state;
state.status = 0;
err_t ret = dns_gethostbyname(host, (ip_addr_t*)&state.ipaddr, lwip_getaddrinfo_cb, &state);
switch (ret) {
case ERR_OK:
// cached
state.status = 1;
break;
case ERR_INPROGRESS:
while (state.status == 0) {
poll_sockets();
}
break;
default:
state.status = ret;
}
if (state.status < 0) {
// TODO: CPython raises gaierror, we raise with native lwIP negative error
// values, to differentiate from normal errno's at least in such way.
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(state.status)));
}
mp_obj_tuple_t *tuple = mp_obj_new_tuple(5, NULL);
tuple->items[0] = MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_AF_INET);
tuple->items[1] = MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_SOCK_STREAM);
tuple->items[2] = MP_OBJ_NEW_SMALL_INT(0);
tuple->items[3] = MP_OBJ_NEW_QSTR(MP_QSTR_);
tuple->items[4] = netutils_format_inet_addr((uint8_t*)&state.ipaddr, port, NETUTILS_BIG);
return mp_obj_new_list(1, (mp_obj_t*)&tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_getaddrinfo_obj, lwip_getaddrinfo);
#ifdef MICROPY_PY_LWIP
STATIC const mp_map_elem_t mp_module_lwip_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_lwip) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_reset), (mp_obj_t)&mod_lwip_reset_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&mod_lwip_callback_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_getaddrinfo), (mp_obj_t)&lwip_getaddrinfo_obj },
// objects
{ MP_OBJ_NEW_QSTR(MP_QSTR_socket), (mp_obj_t)&lwip_socket_type },
#ifdef MICROPY_PY_LWIP_SLIP
{ MP_OBJ_NEW_QSTR(MP_QSTR_slip), (mp_obj_t)&lwip_slip_type },
#endif
// class constants
{ MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET), MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_AF_INET) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET6), MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_AF_INET6) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_STREAM), MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_SOCK_STREAM) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_DGRAM), MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_SOCK_DGRAM) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_RAW), MP_OBJ_NEW_SMALL_INT(MOD_NETWORK_SOCK_RAW) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_lwip_globals, mp_module_lwip_globals_table);
const mp_obj_module_t mp_module_lwip = {
.base = { &mp_type_module },
.name = MP_QSTR_lwip,
.globals = (mp_obj_dict_t*)&mp_module_lwip_globals,
};
#endif // MICROPY_PY_LWIP
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