463 lines
16 KiB
C
463 lines
16 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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* Copyright (c) 2014 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "objtuple.h"
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#include "objarray.h"
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#include "objstr.h"
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#include "runtime.h"
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#include "stream.h"
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#include "builtin.h"
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/*
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The idea of this module is to implement reasonable minimum of
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socket-related functions to write typical clients and servers.
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The module named "usocket" on purpose, to allow to make
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Python-level module more (or fully) compatible with CPython
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"socket", e.g.:
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---- socket.py ----
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from usocket import *
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from socket_more_funcs import *
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from socket_more_funcs2 import *
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-------------------
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I.e. this module should stay lean, and more functions (if needed)
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should be add to seperate modules (C or Python level).
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*/
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#define MICROPY_SOCKET_EXTRA (0)
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typedef struct _mp_obj_socket_t {
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mp_obj_base_t base;
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int fd;
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} mp_obj_socket_t;
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STATIC const mp_obj_type_t usocket_type;
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// Helper functions
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#define RAISE_ERRNO(err_flag, error_val) \
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{ if (err_flag == -1) \
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{ nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(error_val))); } }
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STATIC mp_obj_socket_t *socket_new(int fd) {
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mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t);
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o->base.type = &usocket_type;
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o->fd = fd;
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return o;
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}
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STATIC void socket_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_socket_t *self = self_in;
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print(env, "<_socket %d>", self->fd);
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}
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STATIC mp_uint_t socket_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
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mp_obj_socket_t *o = o_in;
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mp_int_t r = read(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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return r;
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}
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STATIC mp_uint_t socket_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
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mp_obj_socket_t *o = o_in;
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mp_int_t r = write(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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return r;
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}
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STATIC mp_obj_t socket_close(mp_obj_t self_in) {
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mp_obj_socket_t *self = self_in;
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close(self->fd);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_close_obj, socket_close);
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STATIC mp_obj_t socket_fileno(mp_obj_t self_in) {
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mp_obj_socket_t *self = self_in;
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return MP_OBJ_NEW_SMALL_INT(self->fd);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_fileno_obj, socket_fileno);
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STATIC mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
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mp_obj_socket_t *self = self_in;
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);
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int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);
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STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
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mp_obj_socket_t *self = self_in;
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);
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int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
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STATIC mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
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mp_obj_socket_t *self = self_in;
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int r = listen(self->fd, MP_OBJ_SMALL_INT_VALUE(backlog_in));
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);
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STATIC mp_obj_t socket_accept(mp_obj_t self_in) {
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mp_obj_socket_t *self = self_in;
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struct sockaddr addr;
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socklen_t addr_len = sizeof(addr);
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int fd = accept(self->fd, &addr, &addr_len);
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RAISE_ERRNO(fd, errno);
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mp_obj_tuple_t *t = mp_obj_new_tuple(2, NULL);
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t->items[0] = socket_new(fd);
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t->items[1] = mp_obj_new_bytearray(addr_len, &addr);
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return t;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);
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// Note: besides flag param, this differs from read() in that
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// this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) -
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// these would be thrown as exceptions.
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STATIC mp_obj_t socket_recv(mp_uint_t n_args, const mp_obj_t *args) {
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mp_obj_socket_t *self = args[0];
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int sz = MP_OBJ_SMALL_INT_VALUE(args[1]);
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int flags = 0;
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if (n_args > 2) {
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flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
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}
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byte *buf = m_new(byte, sz);
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int out_sz = recv(self->fd, buf, sz, flags);
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RAISE_ERRNO(out_sz, errno);
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mp_obj_t ret = mp_obj_new_str_of_type(&mp_type_bytes, buf, out_sz);
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m_del(char, buf, sz);
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return ret;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recv_obj, 2, 3, socket_recv);
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// Note: besides flag param, this differs from write() in that
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// this does not swallow blocking errors (EAGAIN, EWOULDBLOCK) -
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// these would be thrown as exceptions.
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STATIC mp_obj_t socket_send(mp_uint_t n_args, const mp_obj_t *args) {
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mp_obj_socket_t *self = args[0];
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int flags = 0;
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if (n_args > 2) {
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flags = MP_OBJ_SMALL_INT_VALUE(args[2]);
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}
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ);
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int out_sz = send(self->fd, bufinfo.buf, bufinfo.len, flags);
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RAISE_ERRNO(out_sz, errno);
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return MP_OBJ_NEW_SMALL_INT(out_sz);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send);
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STATIC mp_obj_t socket_setsockopt(mp_uint_t n_args, const mp_obj_t *args) {
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mp_obj_socket_t *self = args[0];
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int level = MP_OBJ_SMALL_INT_VALUE(args[1]);
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int option = mp_obj_get_int(args[2]);
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const void *optval;
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socklen_t optlen;
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if (MP_OBJ_IS_INT(args[3])) {
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int val = mp_obj_int_get(args[3]);
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optval = &val;
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optlen = sizeof(val);
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} else {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
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optval = bufinfo.buf;
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optlen = bufinfo.len;
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}
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int r = setsockopt(self->fd, level, option, optval, optlen);
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RAISE_ERRNO(r, errno);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt);
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STATIC mp_obj_t socket_setblocking(mp_obj_t self_in, mp_obj_t flag_in) {
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mp_obj_socket_t *self = self_in;
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int val = mp_obj_is_true(flag_in);
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int flags = fcntl(self->fd, F_GETFL, 0);
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RAISE_ERRNO(flags, errno);
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if (val) {
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flags &= ~O_NONBLOCK;
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} else {
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flags |= O_NONBLOCK;
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}
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flags = fcntl(self->fd, F_SETFL, flags);
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RAISE_ERRNO(flags, errno);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);
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STATIC mp_obj_t socket_makefile(mp_uint_t n_args, const mp_obj_t *args) {
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// TODO: CPython explicitly says that closing returned object doesn't close
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// the original socket (Python2 at all says that fd is dup()ed). But we
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// save on the bloat.
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mp_obj_socket_t *self = args[0];
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mp_obj_t *new_args = alloca(n_args * sizeof(mp_obj_t));
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memcpy(new_args + 1, args + 1, (n_args - 1) * sizeof(mp_obj_t));
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new_args[0] = MP_OBJ_NEW_SMALL_INT(self->fd);
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mp_map_t kwargs;
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mp_map_init(&kwargs, 0);
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return mp_builtin_open(n_args, new_args, &kwargs);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile);
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STATIC mp_obj_t socket_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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int family = AF_INET;
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int type = SOCK_STREAM;
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int proto = 0;
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if (n_args > 0) {
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assert(MP_OBJ_IS_SMALL_INT(args[0]));
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family = MP_OBJ_SMALL_INT_VALUE(args[0]);
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if (n_args > 1) {
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assert(MP_OBJ_IS_SMALL_INT(args[1]));
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type = MP_OBJ_SMALL_INT_VALUE(args[1]);
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if (n_args > 2) {
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assert(MP_OBJ_IS_SMALL_INT(args[2]));
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proto = MP_OBJ_SMALL_INT_VALUE(args[2]);
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}
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}
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}
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int fd = socket(family, type, proto);
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RAISE_ERRNO(fd, errno);
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return socket_new(fd);
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}
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STATIC const mp_map_elem_t usocket_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_fileno), (mp_obj_t)&socket_fileno_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_makefile), (mp_obj_t)&socket_makefile_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readinto), (mp_obj_t)&mp_stream_readinto_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_connect), (mp_obj_t)&socket_connect_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_bind), (mp_obj_t)&socket_bind_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_listen), (mp_obj_t)&socket_listen_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_accept), (mp_obj_t)&socket_accept_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&socket_recv_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&socket_send_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_setsockopt), (mp_obj_t)&socket_setsockopt_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_setblocking), (mp_obj_t)&socket_setblocking_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&socket_close_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(usocket_locals_dict, usocket_locals_dict_table);
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STATIC const mp_stream_p_t usocket_stream_p = {
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.read = socket_read,
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.write = socket_write,
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};
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STATIC const mp_obj_type_t usocket_type = {
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{ &mp_type_type },
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.name = MP_QSTR_socket,
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.print = socket_print,
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.make_new = socket_make_new,
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.getiter = NULL,
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.iternext = NULL,
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.stream_p = &usocket_stream_p,
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.locals_dict = (mp_obj_t)&usocket_locals_dict,
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};
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#if MICROPY_SOCKET_EXTRA
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STATIC mp_obj_t mod_socket_htons(mp_obj_t arg) {
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return MP_OBJ_NEW_SMALL_INT(htons(MP_OBJ_SMALL_INT_VALUE(arg)));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_htons_obj, mod_socket_htons);
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STATIC mp_obj_t mod_socket_inet_aton(mp_obj_t arg) {
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assert(MP_OBJ_IS_TYPE(arg, &mp_type_str));
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const char *s = mp_obj_str_get_str(arg);
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struct in_addr addr;
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if (!inet_aton(s, &addr)) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL)));
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}
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return mp_obj_new_int(addr.s_addr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_inet_aton_obj, mod_socket_inet_aton);
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STATIC mp_obj_t mod_socket_gethostbyname(mp_obj_t arg) {
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assert(MP_OBJ_IS_TYPE(arg, &mp_type_str));
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const char *s = mp_obj_str_get_str(arg);
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struct hostent *h = gethostbyname(s);
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if (h == NULL) {
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// CPython: socket.herror
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(h_errno)));
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}
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assert(h->h_length == 4);
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return mp_obj_new_int(*(int*)*h->h_addr_list);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_gethostbyname_obj, mod_socket_gethostbyname);
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#endif // MICROPY_SOCKET_EXTRA
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STATIC mp_obj_t mod_socket_getaddrinfo(mp_uint_t n_args, const mp_obj_t *args) {
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// TODO: Implement all args
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assert(n_args == 2);
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assert(MP_OBJ_IS_STR(args[0]));
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const char *host = mp_obj_str_get_str(args[0]);
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const char *serv = NULL;
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struct addrinfo hints;
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memset(&hints, 0, sizeof(hints));
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// getaddrinfo accepts port in string notation, so however
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// it may seem stupid, we need to convert int to str
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if (MP_OBJ_IS_SMALL_INT(args[1])) {
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int port = (short)MP_OBJ_SMALL_INT_VALUE(args[1]);
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char buf[6];
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sprintf(buf, "%d", port);
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serv = buf;
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hints.ai_flags = AI_NUMERICSERV;
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#ifdef __UCLIBC_MAJOR__
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#if __UCLIBC_MAJOR__ == 0 && (__UCLIBC_MINOR__ < 9 || (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ <= 32))
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// "warning" requires -Wno-cpp which is a relatively new gcc option, so we choose not to use it.
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//#warning Working around uClibc bug with numeric service name
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// Older versions og uClibc have bugs when numeric ports in service
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// arg require also hints.ai_socktype (or hints.ai_protocol) != 0
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// This actually was fixed in 0.9.32.1, but uClibc doesn't allow to
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// test for that.
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// http://git.uclibc.org/uClibc/commit/libc/inet/getaddrinfo.c?id=bc3be18145e4d5
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// Note that this is crude workaround, precluding UDP socket addresses
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// to be returned. TODO: set only if not set by Python args.
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hints.ai_socktype = SOCK_STREAM;
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#endif
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#endif
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} else {
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serv = mp_obj_str_get_str(args[1]);
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}
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struct addrinfo *addr_list;
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int res = getaddrinfo(host, serv, &hints, &addr_list);
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if (res != 0) {
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// CPython: socket.gaierror
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "[addrinfo error %d]", res));
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}
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assert(addr_list);
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mp_obj_t list = mp_obj_new_list(0, NULL);
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for (struct addrinfo *addr = addr_list; addr; addr = addr->ai_next) {
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mp_obj_tuple_t *t = mp_obj_new_tuple(5, NULL);
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t->items[0] = MP_OBJ_NEW_SMALL_INT(addr->ai_family);
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t->items[1] = MP_OBJ_NEW_SMALL_INT(addr->ai_socktype);
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t->items[2] = MP_OBJ_NEW_SMALL_INT(addr->ai_protocol);
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// "canonname will be a string representing the canonical name of the host
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// 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, t);
|
|
}
|
|
freeaddrinfo(addr_list);
|
|
return list;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 6, mod_socket_getaddrinfo);
|
|
|
|
extern mp_obj_type_t sockaddr_in_type;
|
|
|
|
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_socket), (mp_obj_t)&usocket_type },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_getaddrinfo), (mp_obj_t)&mod_socket_getaddrinfo_obj },
|
|
#if MICROPY_SOCKET_EXTRA
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_sockaddr_in), (mp_obj_t)&sockaddr_in_type },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_htons), (mp_obj_t)&mod_socket_htons_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_inet_aton), (mp_obj_t)&mod_socket_inet_aton_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_gethostbyname), (mp_obj_t)&mod_socket_gethostbyname_obj },
|
|
#endif
|
|
|
|
#define C(name) { MP_OBJ_NEW_QSTR(MP_QSTR_ ## name), MP_OBJ_NEW_SMALL_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 },
|
|
.name = MP_QSTR_usocket,
|
|
.globals = (mp_obj_dict_t*)&mp_module_socket_globals,
|
|
};
|