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micropython/ports/unix/modusocket.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Paul Sokolovsky
* Copyright (c) 2014-2019 Damien P. George
*
* 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 <assert.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <math.h>
#include "py/objtuple.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "py/builtin.h"
#include "py/mphal.h"
#include "py/mpthread.h"
#include <poll.h>
/*
The idea of this module is to implement reasonable minimum of
socket-related functions to write typical clients and servers.
The module named "usocket" on purpose, to allow to make
Python-level module more (or fully) compatible with CPython
"socket", e.g.:
---- socket.py ----
from usocket import *
from socket_more_funcs import *
from socket_more_funcs2 import *
-------------------
I.e. this module should stay lean, and more functions (if needed)
should be add to separate modules (C or Python level).
*/
// This type must "inherit" from mp_obj_fdfile_t, i.e. matching subset of
// fields should have the same layout.
typedef struct _mp_obj_socket_t {
mp_obj_base_t base;
int fd;
bool blocking;
} mp_obj_socket_t;
const mp_obj_type_t mp_type_socket;
// Helper functions
static inline mp_obj_t mp_obj_from_sockaddr(const struct sockaddr *addr, socklen_t len) {
return mp_obj_new_bytes((const byte *)addr, len);
}
STATIC mp_obj_socket_t *socket_new(int fd) {
mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t);
o->base.type = &mp_type_socket;
o->fd = fd;
o->blocking = true;
return o;
}
STATIC void socket_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "<_socket %d>", self->fd);
}
STATIC mp_uint_t socket_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
mp_obj_socket_t *o = MP_OBJ_TO_PTR(o_in);
ssize_t r;
MP_HAL_RETRY_SYSCALL(r, read(o->fd, buf, size), {
// On blocking socket, we get EAGAIN in case SO_RCVTIMEO/SO_SNDTIMEO
// timed out, and need to convert that to ETIMEDOUT.
if (err == EAGAIN && o->blocking) {
err = MP_ETIMEDOUT;
}
*errcode = err;
return MP_STREAM_ERROR;
});
return (mp_uint_t)r;
}
STATIC mp_uint_t socket_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
mp_obj_socket_t *o = MP_OBJ_TO_PTR(o_in);
ssize_t r;
MP_HAL_RETRY_SYSCALL(r, write(o->fd, buf, size), {
// On blocking socket, we get EAGAIN in case SO_RCVTIMEO/SO_SNDTIMEO
// timed out, and need to convert that to ETIMEDOUT.
if (err == EAGAIN && o->blocking) {
err = MP_ETIMEDOUT;
}
*errcode = err;
return MP_STREAM_ERROR;
});
return (mp_uint_t)r;
}
STATIC mp_uint_t socket_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(o_in);
(void)arg;
switch (request) {
case MP_STREAM_CLOSE:
// There's a POSIX drama regarding return value of close in general,
// and EINTR error in particular. See e.g.
// http://lwn.net/Articles/576478/
// http://austingroupbugs.net/view.php?id=529
// The rationale MicroPython follows is that close() just releases
// file descriptor. If you're interested to catch I/O errors before
// closing fd, fsync() it.
MP_THREAD_GIL_EXIT();
close(self->fd);
MP_THREAD_GIL_ENTER();
return 0;
case MP_STREAM_GET_FILENO:
return self->fd;
#if MICROPY_PY_USELECT
case MP_STREAM_POLL: {
mp_uint_t ret = 0;
uint8_t pollevents = 0;
if (arg & MP_STREAM_POLL_RD) {
pollevents |= POLLIN;
}
if (arg & MP_STREAM_POLL_WR) {
pollevents |= POLLOUT;
}
struct pollfd pfd = { .fd = self->fd, .events = pollevents };
if (poll(&pfd, 1, 0) > 0) {
if (pfd.revents & POLLIN) {
ret |= MP_STREAM_POLL_RD;
}
if (pfd.revents & POLLOUT) {
ret |= MP_STREAM_POLL_WR;
}
}
return ret;
}
#endif
default:
*errcode = MP_EINVAL;
return MP_STREAM_ERROR;
}
}
STATIC mp_obj_t socket_fileno(mp_obj_t self_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
return MP_OBJ_NEW_SMALL_INT(self->fd);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_fileno_obj, socket_fileno);
STATIC mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);
// special case of PEP 475 to retry only if blocking so we can't use
// MP_HAL_RETRY_SYSCALL() here
for (;;) {
MP_THREAD_GIL_EXIT();
int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
MP_THREAD_GIL_ENTER();
if (r == -1) {
int err = errno;
if (self->blocking) {
if (err == EINTR) {
mp_handle_pending(true);
continue;
}
// EINPROGRESS on a blocking socket means the operation timed out
if (err == EINPROGRESS) {
err = MP_ETIMEDOUT;
}
}
mp_raise_OSError(err);
}
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);
STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);
MP_THREAD_GIL_EXIT();
int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(r, errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
STATIC mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
MP_THREAD_GIL_EXIT();
int r = listen(self->fd, MP_OBJ_SMALL_INT_VALUE(backlog_in));
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(r, errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);
STATIC mp_obj_t socket_accept(mp_obj_t self_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
// sockaddr_storage isn't stack-friendly (129 bytes or so)
// struct sockaddr_storage addr;
byte addr[32];
socklen_t addr_len = sizeof(addr);
int fd;
MP_HAL_RETRY_SYSCALL(fd, accept(self->fd, (struct sockaddr *)&addr, &addr_len), {
// EAGAIN on a blocking socket means the operation timed out
if (self->blocking && err == EAGAIN) {
err = MP_ETIMEDOUT;
}
mp_raise_OSError(err);
});
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
t->items[0] = MP_OBJ_FROM_PTR(socket_new(fd));
t->items[1] = mp_obj_new_bytearray(addr_len, &addr);
return MP_OBJ_FROM_PTR(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);
// Note: besides flag param, this differs from read() in that
// this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) -
// these would be thrown as exceptions.
STATIC mp_obj_t socket_recv(size_t n_args, const mp_obj_t *args) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
int sz = MP_OBJ_SMALL_INT_VALUE(args[1]);
int flags = 0;
if (n_args > 2) {
flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
}
byte *buf = m_new(byte, sz);
ssize_t out_sz;
MP_HAL_RETRY_SYSCALL(out_sz, recv(self->fd, buf, sz, flags), mp_raise_OSError(err));
mp_obj_t ret = mp_obj_new_str_of_type(&mp_type_bytes, buf, out_sz);
m_del(char, buf, sz);
return ret;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recv_obj, 2, 3, socket_recv);
STATIC mp_obj_t socket_recvfrom(size_t n_args, const mp_obj_t *args) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
int sz = MP_OBJ_SMALL_INT_VALUE(args[1]);
int flags = 0;
if (n_args > 2) {
flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
}
struct sockaddr_storage addr;
socklen_t addr_len = sizeof(addr);
byte *buf = m_new(byte, sz);
ssize_t out_sz;
MP_HAL_RETRY_SYSCALL(out_sz, recvfrom(self->fd, buf, sz, flags, (struct sockaddr *)&addr, &addr_len),
mp_raise_OSError(err));
mp_obj_t buf_o = mp_obj_new_str_of_type(&mp_type_bytes, buf, out_sz);
m_del(char, buf, sz);
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
t->items[0] = buf_o;
t->items[1] = mp_obj_from_sockaddr((struct sockaddr *)&addr, addr_len);
return MP_OBJ_FROM_PTR(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recvfrom_obj, 2, 3, socket_recvfrom);
// Note: besides flag param, this differs from write() in that
// this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) -
// these would be thrown as exceptions.
STATIC mp_obj_t socket_send(size_t n_args, const mp_obj_t *args) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
int flags = 0;
if (n_args > 2) {
flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
}
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ);
ssize_t out_sz;
MP_HAL_RETRY_SYSCALL(out_sz, send(self->fd, bufinfo.buf, bufinfo.len, flags),
mp_raise_OSError(err));
return MP_OBJ_NEW_SMALL_INT(out_sz);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send);
STATIC mp_obj_t socket_sendto(size_t n_args, const mp_obj_t *args) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
int flags = 0;
mp_obj_t dst_addr = args[2];
if (n_args > 3) {
flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
dst_addr = args[3];
}
mp_buffer_info_t bufinfo, addr_bi;
mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ);
mp_get_buffer_raise(dst_addr, &addr_bi, MP_BUFFER_READ);
ssize_t out_sz;
MP_HAL_RETRY_SYSCALL(out_sz, sendto(self->fd, bufinfo.buf, bufinfo.len, flags,
(struct sockaddr *)addr_bi.buf, addr_bi.len), mp_raise_OSError(err));
return MP_OBJ_NEW_SMALL_INT(out_sz);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_sendto_obj, 3, 4, socket_sendto);
STATIC mp_obj_t socket_setsockopt(size_t n_args, const mp_obj_t *args) {
(void)n_args; // always 4
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
int level = MP_OBJ_SMALL_INT_VALUE(args[1]);
int option = mp_obj_get_int(args[2]);
const void *optval;
socklen_t optlen;
int val;
if (mp_obj_is_int(args[3])) {
val = mp_obj_int_get_truncated(args[3]);
optval = &val;
optlen = sizeof(val);
} else {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
optval = bufinfo.buf;
optlen = bufinfo.len;
}
MP_THREAD_GIL_EXIT();
int r = setsockopt(self->fd, level, option, optval, optlen);
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(r, errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt);
STATIC mp_obj_t socket_setblocking(mp_obj_t self_in, mp_obj_t flag_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
int val = mp_obj_is_true(flag_in);
MP_THREAD_GIL_EXIT();
int flags = fcntl(self->fd, F_GETFL, 0);
if (flags == -1) {
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(flags, errno);
}
if (val) {
flags &= ~O_NONBLOCK;
} else {
flags |= O_NONBLOCK;
}
flags = fcntl(self->fd, F_SETFL, flags);
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(flags, errno);
self->blocking = val;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);
STATIC mp_obj_t socket_settimeout(mp_obj_t self_in, mp_obj_t timeout_in) {
mp_obj_socket_t *self = MP_OBJ_TO_PTR(self_in);
struct timeval tv = {0,};
bool new_blocking = true;
// Timeout of None means no timeout, which in POSIX is signified with 0 timeout,
// and that's how 'tv' is initialized above
if (timeout_in != mp_const_none) {
#if MICROPY_PY_BUILTINS_FLOAT
mp_float_t val = mp_obj_get_float(timeout_in);
mp_float_t ipart;
tv.tv_usec = (time_t)MICROPY_FLOAT_C_FUN(round)(MICROPY_FLOAT_C_FUN(modf)(val, &ipart) * MICROPY_FLOAT_CONST(1000000.));
tv.tv_sec = (suseconds_t)ipart;
#else
tv.tv_sec = mp_obj_get_int(timeout_in);
#endif
// For SO_RCVTIMEO/SO_SNDTIMEO, zero timeout means infinity, but
// for Python API it means non-blocking.
if (tv.tv_sec == 0 && tv.tv_usec == 0) {
new_blocking = false;
}
}
if (new_blocking) {
int r;
MP_THREAD_GIL_EXIT();
r = setsockopt(self->fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval));
if (r == -1) {
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(r, errno);
}
r = setsockopt(self->fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(struct timeval));
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(r, errno);
}
if (self->blocking != new_blocking) {
socket_setblocking(self_in, mp_obj_new_bool(new_blocking));
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_settimeout_obj, socket_settimeout);
STATIC mp_obj_t socket_makefile(size_t n_args, const mp_obj_t *args) {
// TODO: CPython explicitly says that closing returned object doesn't close
// the original socket (Python2 at all says that fd is dup()ed). But we
// save on the bloat.
mp_obj_socket_t *self = MP_OBJ_TO_PTR(args[0]);
mp_obj_t *new_args = alloca(n_args * sizeof(mp_obj_t));
memcpy(new_args + 1, args + 1, (n_args - 1) * sizeof(mp_obj_t));
new_args[0] = MP_OBJ_NEW_SMALL_INT(self->fd);
return mp_builtin_open(n_args, new_args, (mp_map_t *)&mp_const_empty_map);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile);
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) {
(void)type_in;
(void)n_kw;
int family = AF_INET;
int type = SOCK_STREAM;
int proto = 0;
if (n_args > 0) {
assert(mp_obj_is_small_int(args[0]));
family = MP_OBJ_SMALL_INT_VALUE(args[0]);
if (n_args > 1) {
assert(mp_obj_is_small_int(args[1]));
type = MP_OBJ_SMALL_INT_VALUE(args[1]);
if (n_args > 2) {
assert(mp_obj_is_small_int(args[2]));
proto = MP_OBJ_SMALL_INT_VALUE(args[2]);
}
}
}
MP_THREAD_GIL_EXIT();
int fd = socket(family, type, proto);
MP_THREAD_GIL_ENTER();
RAISE_ERRNO(fd, errno);
return MP_OBJ_FROM_PTR(socket_new(fd));
}
STATIC const mp_rom_map_elem_t usocket_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&socket_fileno_obj) },
{ MP_ROM_QSTR(MP_QSTR_makefile), MP_ROM_PTR(&socket_makefile_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) },
{ MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&socket_connect_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_recv), MP_ROM_PTR(&socket_recv_obj) },
{ MP_ROM_QSTR(MP_QSTR_recvfrom), MP_ROM_PTR(&socket_recvfrom_obj) },
{ MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&socket_send_obj) },
{ MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socket_sendto_obj) },
{ MP_ROM_QSTR(MP_QSTR_setsockopt), MP_ROM_PTR(&socket_setsockopt_obj) },
{ MP_ROM_QSTR(MP_QSTR_setblocking), MP_ROM_PTR(&socket_setblocking_obj) },
{ MP_ROM_QSTR(MP_QSTR_settimeout), MP_ROM_PTR(&socket_settimeout_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
};
STATIC MP_DEFINE_CONST_DICT(usocket_locals_dict, usocket_locals_dict_table);
STATIC const mp_stream_p_t usocket_stream_p = {
.read = socket_read,
.write = socket_write,
.ioctl = socket_ioctl,
};
const mp_obj_type_t mp_type_socket = {
{ &mp_type_type },
.name = MP_QSTR_socket,
.print = socket_print,
.make_new = socket_make_new,
.getiter = NULL,
.iternext = NULL,
.protocol = &usocket_stream_p,
.locals_dict = (mp_obj_dict_t *)&usocket_locals_dict,
};
#define BINADDR_MAX_LEN sizeof(struct in6_addr)
STATIC mp_obj_t mod_socket_inet_pton(mp_obj_t family_in, mp_obj_t addr_in) {
int family = mp_obj_get_int(family_in);
byte binaddr[BINADDR_MAX_LEN];
int r = inet_pton(family, mp_obj_str_get_str(addr_in), binaddr);
RAISE_ERRNO(r, errno);
if (r == 0) {
mp_raise_OSError(MP_EINVAL);
}
int binaddr_len = 0;
switch (family) {
case AF_INET:
binaddr_len = sizeof(struct in_addr);
break;
case AF_INET6:
binaddr_len = sizeof(struct in6_addr);
break;
}
return mp_obj_new_bytes(binaddr, binaddr_len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_socket_inet_pton_obj, mod_socket_inet_pton);
STATIC mp_obj_t mod_socket_inet_ntop(mp_obj_t family_in, mp_obj_t binaddr_in) {
int family = mp_obj_get_int(family_in);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(binaddr_in, &bufinfo, MP_BUFFER_READ);
vstr_t vstr;
vstr_init_len(&vstr, family == AF_INET ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN);
if (inet_ntop(family, bufinfo.buf, vstr.buf, vstr.len) == NULL) {
mp_raise_OSError(errno);
}
vstr.len = strlen(vstr.buf);
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_socket_inet_ntop_obj, mod_socket_inet_ntop);
STATIC mp_obj_t mod_socket_getaddrinfo(size_t n_args, const mp_obj_t *args) {
// TODO: Implement 5th and 6th args
const char *host = mp_obj_str_get_str(args[0]);
const char *serv = NULL;
struct addrinfo hints;
char buf[6];
memset(&hints, 0, sizeof(hints));
// getaddrinfo accepts port in string notation, so however
// it may seem stupid, we need to convert int to str
if (mp_obj_is_small_int(args[1])) {
unsigned port = (unsigned short)MP_OBJ_SMALL_INT_VALUE(args[1]);
snprintf(buf, sizeof(buf), "%u", port);
serv = buf;
hints.ai_flags = AI_NUMERICSERV;
#ifdef __UCLIBC_MAJOR__
#if __UCLIBC_MAJOR__ == 0 && (__UCLIBC_MINOR__ < 9 || (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ <= 32))
// "warning" requires -Wno-cpp which is a relatively new gcc option, so we choose not to use it.
// #warning Working around uClibc bug with numeric service name
// Older versions og uClibc have bugs when numeric ports in service
// arg require also hints.ai_socktype (or hints.ai_protocol) != 0
// This actually was fixed in 0.9.32.1, but uClibc doesn't allow to
// test for that.
// http://git.uclibc.org/uClibc/commit/libc/inet/getaddrinfo.c?id=bc3be18145e4d5
// Note that this is crude workaround, precluding UDP socket addresses
// to be returned. TODO: set only if not set by Python args.
hints.ai_socktype = SOCK_STREAM;
#endif
#endif
} else {
serv = mp_obj_str_get_str(args[1]);
}
if (n_args > 2) {
hints.ai_family = MP_OBJ_SMALL_INT_VALUE(args[2]);
if (n_args > 3) {
hints.ai_socktype = MP_OBJ_SMALL_INT_VALUE(args[3]);
}
}
struct addrinfo *addr_list;
MP_THREAD_GIL_EXIT();
int res = getaddrinfo(host, serv, &hints, &addr_list);
MP_THREAD_GIL_ENTER();
if (res != 0) {
// CPython: socket.gaierror
mp_raise_msg_varg(&mp_type_OSError, MP_ERROR_TEXT("[addrinfo error %d]"), res);
}
assert(addr_list);
mp_obj_t list = mp_obj_new_list(0, NULL);
for (struct addrinfo *addr = addr_list; addr; addr = addr->ai_next) {
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(5, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(addr->ai_family);
t->items[1] = MP_OBJ_NEW_SMALL_INT(addr->ai_socktype);
t->items[2] = MP_OBJ_NEW_SMALL_INT(addr->ai_protocol);
// "canonname will be a string representing the canonical name of the host
// if AI_CANONNAME is part of the flags argument; else canonname will be empty." ??
if (addr->ai_canonname) {
t->items[3] = MP_OBJ_NEW_QSTR(qstr_from_str(addr->ai_canonname));
} else {
t->items[3] = mp_const_none;
}
t->items[4] = mp_obj_new_bytearray(addr->ai_addrlen, addr->ai_addr);
mp_obj_list_append(list, MP_OBJ_FROM_PTR(t));
}
freeaddrinfo(addr_list);
return list;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 4, mod_socket_getaddrinfo);
STATIC mp_obj_t mod_socket_sockaddr(mp_obj_t sockaddr_in) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(sockaddr_in, &bufinfo, MP_BUFFER_READ);
switch (((struct sockaddr *)bufinfo.buf)->sa_family) {
case AF_INET: {
struct sockaddr_in *sa = (struct sockaddr_in *)bufinfo.buf;
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(AF_INET);
t->items[1] = mp_obj_new_bytes((byte *)&sa->sin_addr, sizeof(sa->sin_addr));
t->items[2] = MP_OBJ_NEW_SMALL_INT(ntohs(sa->sin_port));
return MP_OBJ_FROM_PTR(t);
}
case AF_INET6: {
struct sockaddr_in6 *sa = (struct sockaddr_in6 *)bufinfo.buf;
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(5, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(AF_INET6);
t->items[1] = mp_obj_new_bytes((byte *)&sa->sin6_addr, sizeof(sa->sin6_addr));
t->items[2] = MP_OBJ_NEW_SMALL_INT(ntohs(sa->sin6_port));
t->items[3] = MP_OBJ_NEW_SMALL_INT(ntohl(sa->sin6_flowinfo));
t->items[4] = MP_OBJ_NEW_SMALL_INT(ntohl(sa->sin6_scope_id));
return MP_OBJ_FROM_PTR(t);
}
default: {
struct sockaddr *sa = (struct sockaddr *)bufinfo.buf;
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(sa->sa_family);
t->items[1] = mp_obj_new_bytes((byte *)sa->sa_data, bufinfo.len - offsetof(struct sockaddr, sa_data));
return MP_OBJ_FROM_PTR(t);
}
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_sockaddr_obj, mod_socket_sockaddr);
STATIC const mp_rom_map_elem_t mp_module_socket_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_usocket) },
{ MP_ROM_QSTR(MP_QSTR_socket), MP_ROM_PTR(&mp_type_socket) },
{ MP_ROM_QSTR(MP_QSTR_getaddrinfo), MP_ROM_PTR(&mod_socket_getaddrinfo_obj) },
{ MP_ROM_QSTR(MP_QSTR_inet_pton), MP_ROM_PTR(&mod_socket_inet_pton_obj) },
{ MP_ROM_QSTR(MP_QSTR_inet_ntop), MP_ROM_PTR(&mod_socket_inet_ntop_obj) },
{ MP_ROM_QSTR(MP_QSTR_sockaddr), MP_ROM_PTR(&mod_socket_sockaddr_obj) },
#define C(name) { MP_ROM_QSTR(MP_QSTR_##name), MP_ROM_INT(name) }
C(AF_UNIX),
C(AF_INET),
C(AF_INET6),
C(SOCK_STREAM),
C(SOCK_DGRAM),
C(SOCK_RAW),
C(MSG_DONTROUTE),
C(MSG_DONTWAIT),
C(SOL_SOCKET),
C(SO_BROADCAST),
C(SO_ERROR),
C(SO_KEEPALIVE),
C(SO_LINGER),
C(SO_REUSEADDR),
#undef C
};
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,
};
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