circuitpython/shared-bindings/socket/__init__.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * SPDX-FileCopyrightText: Copyright (c) 2014 Damien P. George
 *               2018 Nick Moore for Adafruit Industries
 *
 * 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 <string.h>

#include "py/objtuple.h"
#include "py/objlist.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "py/mperrno.h"
#include "lib/netutils/netutils.h"

#include "shared-module/network/__init__.h"

//| """TCP, UDP and RAW socket support
//|
//| .. warning:: This module is disabled in 6.x and will removed in 7.x. Please use networking
//|              libraries instead. (Native networking will provide a socket compatible class.)
//|
//| Create TCP, UDP and RAW sockets for communicating over the Internet."""
//|

STATIC const mp_obj_type_t socket_type;

//| class socket:
//|
//|     AF_INET: int
//|     AF_INET6: int
//|     SOCK_STREAM: int
//|     SOCK_DGRAM: int
//|     SOCK_RAW: int
//|     IPPROTO_TCP: int
//|
//|     def __init__(self, family: int = AF_INET, type: int = SOCK_STREAM, proto: int = IPPROTO_TCP) -> None:
//|         """Create a new socket
//|
//|         :param int family: AF_INET or AF_INET6
//|         :param int type: SOCK_STREAM, SOCK_DGRAM or SOCK_RAW
//|         :param int proto: IPPROTO_TCP, IPPROTO_UDP or IPPROTO_RAW (ignored)"""
//|         ...
//|

STATIC mp_obj_t socket_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
    mp_arg_check_num(n_args, kw_args, 0, 4, false);

    // create socket object (not bound to any NIC yet)
    mod_network_socket_obj_t *s = m_new_obj_with_finaliser(mod_network_socket_obj_t);
    s->base.type = &socket_type;
    s->nic = MP_OBJ_NULL;
    s->nic_type = NULL;
    s->u_param.domain = MOD_NETWORK_AF_INET;
    s->u_param.type = MOD_NETWORK_SOCK_STREAM;
    s->u_param.fileno = -1;
    if (n_args >= 1) {
        s->u_param.domain = mp_obj_get_int(args[0]);
        if (n_args >= 2) {
            s->u_param.type = mp_obj_get_int(args[1]);
            if (n_args >= 4) {
                s->u_param.fileno = mp_obj_get_int(args[3]);
            }
        }
    }

    return MP_OBJ_FROM_PTR(s);
}

STATIC void socket_select_nic(mod_network_socket_obj_t *self, const byte *ip) {
    if (self->nic == MP_OBJ_NULL) {
        // select NIC based on IP
        self->nic = network_module_find_nic(ip);
        self->nic_type = (mod_network_nic_type_t*)mp_obj_get_type(self->nic);

        // call the NIC to open the socket
        int _errno;
        if (self->nic_type->socket(self, &_errno) != 0) {
            mp_raise_OSError(_errno);
        }
    }
}

//|     def bind(self, address: Tuple[str, int]) -> None:
//|         """Bind a socket to an address
//|
//|         :param address: tuple of (remote_address, remote_port)
//|         :type address: tuple(str, int)"""
//|         ...
//|

STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);

    // get address
    uint8_t ip[MOD_NETWORK_IPADDR_BUF_SIZE];
    mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);

    // check if we need to select a NIC
    socket_select_nic(self, ip);

    // call the NIC to bind the socket
    int _errno;
    if (self->nic_type->bind(self, ip, port, &_errno) != 0) {
        mp_raise_OSError(_errno);
    }

    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);

//|     def listen(self, backlog: int) -> None:
//|         """Set socket to listen for incoming connections
//|
//|         :param int backlog: length of backlog queue for waiting connetions"""
//|         ...
//|

STATIC mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);

    if (self->nic == MP_OBJ_NULL) {
        // not connected
        // TODO I think we can listen even if not bound...
        mp_raise_OSError(MP_ENOTCONN);
    }

    int _errno;
    if (self->nic_type->listen(self, mp_obj_get_int(backlog), &_errno) != 0) {
        mp_raise_OSError(_errno);
    }

    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);

//|     def accept(self) -> Tuple[socket, str]:
//|         """Accept a connection on a listening socket of type SOCK_STREAM,
//|         creating a new socket of type SOCK_STREAM.
//|         Returns a tuple of (new_socket, remote_address)"""
//|

STATIC mp_obj_t socket_accept(mp_obj_t self_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);

    // create new socket object
    // starts with empty NIC so that finaliser doesn't run close() method if accept() fails
    mod_network_socket_obj_t *socket2 = m_new_obj_with_finaliser(mod_network_socket_obj_t);
    socket2->base.type = &socket_type;
    socket2->nic = MP_OBJ_NULL;
    socket2->nic_type = NULL;

    // accept incoming connection
    uint8_t ip[MOD_NETWORK_IPADDR_BUF_SIZE];
    mp_uint_t port;
    int _errno;
    if (self->nic_type->accept(self, socket2, ip, &port, &_errno) != 0) {
        mp_raise_OSError(_errno);
    }

    // new socket has valid state, so set the NIC to the same as parent
    socket2->nic = self->nic;
    socket2->nic_type = self->nic_type;

    // make the return value
    mp_obj_tuple_t *client = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
    client->items[0] = MP_OBJ_FROM_PTR(socket2);
    client->items[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);

    return MP_OBJ_FROM_PTR(client);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);

//|     def connect(self, address: Tuple[str, int]) -> None:
//|         """Connect a socket to a remote address
//|
//|         :param address: tuple of (remote_address, remote_port)
//|         :type address: tuple(str, int)"""
//|         ...
//|

STATIC mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);

    // get address
    uint8_t ip[MOD_NETWORK_IPADDR_BUF_SIZE];
    mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);

    // check if we need to select a NIC
    socket_select_nic(self, ip);

    // call the NIC to connect the socket
    int _errno;
    if (self->nic_type->connect(self, ip, port, &_errno) != 0) {
        mp_raise_OSError(_errno);
    }

    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);

//|     def send(self, bytes: ReadableBuffer) -> int:
//|         """Send some bytes to the connected remote address.
//|         Suits sockets of type SOCK_STREAM
//|
//|         :param ~_typing.ReadableBuffer bytes: some bytes to send"""
//|         ...
//|

STATIC mp_obj_t socket_send(mp_obj_t self_in, mp_obj_t buf_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
    if (self->nic == MP_OBJ_NULL) {
        // not connected
        mp_raise_OSError(MP_EPIPE);
    }
    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);
    int _errno;
    mp_int_t ret = self->nic_type->send(self, bufinfo.buf, bufinfo.len, &_errno);
    if (ret == -1) {
        mp_raise_OSError(_errno);
    }
    return mp_obj_new_int_from_uint(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_send_obj, socket_send);


// helper function for socket_recv and socket_recv_into to handle common operations of both
STATIC mp_int_t _socket_recv_into(mod_network_socket_obj_t *sock, byte *buf, mp_int_t len) {
    int _errno;
    mp_int_t ret = sock->nic_type->recv(sock, buf, len, &_errno);
    if (ret == -1) {
        mp_raise_OSError(_errno);
    }
    return ret;
}


//|     def recv_into(self, buffer: WriteableBuffer, bufsize: int) -> int:
//|         """Reads some bytes from the connected remote address, writing
//|         into the provided buffer. If bufsize <= len(buffer) is given,
//|         a maximum of bufsize bytes will be read into the buffer. If no
//|         valid value is given for bufsize, the default is the length of
//|         the given buffer.
//|
//|         Suits sockets of type SOCK_STREAM
//|         Returns an int of number of bytes read.
//|
//|         :param ~_typing.WriteableBuffer buffer: buffer to receive into
//|         :param int bufsize: optionally, a maximum number of bytes to read."""
//|         ...
//|

STATIC mp_obj_t socket_recv_into(size_t n_args, const mp_obj_t *args) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(args[0]);
    if (self->nic == MP_OBJ_NULL) {
        // not connected
        mp_raise_OSError(MP_ENOTCONN);
    }
    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_WRITE);
    mp_int_t len = bufinfo.len;
    if (n_args == 3) {
        mp_int_t given_len = mp_obj_get_int(args[2]);
        if (given_len < len) {
            len = given_len;
        }
    }

    mp_int_t ret = _socket_recv_into(self, (byte*)bufinfo.buf, len);
    return mp_obj_new_int_from_uint(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_recv_into_obj, 2, 3, socket_recv_into);

//|     def recv(self, bufsize: int) -> bytes:
//|         """Reads some bytes from the connected remote address.
//|         Suits sockets of type SOCK_STREAM
//|         Returns a bytes() of length <= bufsize
//|
//|         :param int bufsize: maximum number of bytes to receive"""
//|         ...
//|

STATIC mp_obj_t socket_recv(mp_obj_t self_in, mp_obj_t len_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
    if (self->nic == MP_OBJ_NULL) {
        // not connected
        mp_raise_OSError(MP_ENOTCONN);
    }
    mp_int_t len = mp_obj_get_int(len_in);
    vstr_t vstr;
    vstr_init_len(&vstr, len);
    mp_int_t ret = _socket_recv_into(self, (byte*)vstr.buf, len);
    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(socket_recv_obj, socket_recv);

//|     def sendto(self, bytes: ReadableBuffer, address: Tuple[str, int]) -> int:
//|         """Send some bytes to a specific address.
//|         Suits sockets of type SOCK_DGRAM
//|
//|         :param ~_typing.ReadableBuffer bytes: some bytes to send
//|         :param address: tuple of (remote_address, remote_port)
//|         :type address: tuple(str, int)"""
//|         ...
//|

STATIC mp_obj_t socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);

    // get the data
    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);

    // get address
    uint8_t ip[MOD_NETWORK_IPADDR_BUF_SIZE];
    mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);

    // check if we need to select a NIC
    socket_select_nic(self, ip);

    // call the NIC to sendto
    int _errno;
    mp_int_t ret = self->nic_type->sendto(self, bufinfo.buf, bufinfo.len, ip, port, &_errno);
    if (ret == -1) {
        mp_raise_OSError(_errno);
    }

    return mp_obj_new_int(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(socket_sendto_obj, socket_sendto);

//|     def recvfrom(self, bufsize: int) -> Tuple[bytes, Tuple[str, int]]:
//|         """Reads some bytes from the connected remote address.
//|         Suits sockets of type SOCK_STREAM
//|
//|         Returns a tuple containing
//|         * a bytes() of length <= bufsize
//|         * a remote_address, which is a tuple of ip address and port number
//|
//|         :param int bufsize: maximum number of bytes to receive"""
//|         ...
//|

STATIC mp_obj_t socket_recvfrom(mp_obj_t self_in, mp_obj_t len_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
    if (self->nic == MP_OBJ_NULL) {
        // not connected
        mp_raise_OSError(MP_ENOTCONN);
    }
    vstr_t vstr;
    vstr_init_len(&vstr, mp_obj_get_int(len_in));
    byte ip[4];
    mp_uint_t port;
    int _errno;
    mp_int_t ret = self->nic_type->recvfrom(self, (byte*)vstr.buf, vstr.len, ip, &port, &_errno);
    if (ret == -1) {
        mp_raise_OSError(_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(socket_recvfrom_obj, socket_recvfrom);

//|     def setsockopt(self, level: int, optname: int, value: int) -> None:
//|         """Sets socket options"""
//|         ...
//|

STATIC mp_obj_t socket_setsockopt(size_t n_args, const mp_obj_t *args) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(args[0]);

    mp_int_t level = mp_obj_get_int(args[1]);
    mp_int_t opt = mp_obj_get_int(args[2]);

    const void *optval;
    mp_uint_t optlen;
    mp_int_t val;
    if (mp_obj_is_integer(args[3])) {
        val = mp_obj_get_int_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;
    }

    int _errno;
    if (self->nic_type->setsockopt(self, level, opt, optval, optlen, &_errno) != 0) {
        mp_raise_OSError(_errno);
    }

    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt);

//|     def settimeout(self, value: int) -> None:
//|         """Set the timeout value for this socket.
//|
//|         :param int value: timeout in seconds.  0 means non-blocking.  None means block indefinitely."""
//|         ...
//|

STATIC mp_obj_t socket_settimeout(mp_obj_t self_in, mp_obj_t timeout_in) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
    if (self->nic == MP_OBJ_NULL) {
        // not connected
        mp_raise_OSError(MP_ENOTCONN);
    }
    mp_uint_t timeout;
    if (timeout_in == mp_const_none) {
        timeout = -1;
    } else {
        #if MICROPY_PY_BUILTINS_FLOAT
        timeout = 1000 * mp_obj_get_float(timeout_in);
        #else
        timeout = 1000 * mp_obj_get_int(timeout_in);
        #endif
    }
    int _errno;
    if (self->nic_type->settimeout(self, timeout, &_errno) != 0) {
        mp_raise_OSError(_errno);
    }
    return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_settimeout_obj, socket_settimeout);

//|     def setblocking(self, flag: bool) -> Optional[int]:
//|         """Set the blocking behaviour of this socket.
//|
//|         :param bool flag: False means non-blocking, True means block indefinitely."""
//|         ...
//|

// method socket.setblocking(flag)
STATIC mp_obj_t socket_setblocking(mp_obj_t self_in, mp_obj_t blocking) {
    if (mp_obj_is_true(blocking)) {
        return socket_settimeout(self_in, mp_const_none);
    } else {
        return socket_settimeout(self_in, MP_OBJ_NEW_SMALL_INT(0));
    }
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);

STATIC const mp_rom_map_elem_t socket_locals_dict_table[] = {
    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_stream_close_obj) },
    { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
    { MP_ROM_QSTR(MP_QSTR_bind), MP_ROM_PTR(&socket_bind_obj) },
    { MP_ROM_QSTR(MP_QSTR_listen), MP_ROM_PTR(&socket_listen_obj) },
    { MP_ROM_QSTR(MP_QSTR_accept), MP_ROM_PTR(&socket_accept_obj) },
    { MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&socket_connect_obj) },
    { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&socket_send_obj) },
    { MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&socket_recv_obj) },
    { MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socket_sendto_obj) },
    { MP_ROM_QSTR(MP_QSTR_recvfrom), MP_ROM_PTR(&socket_recvfrom_obj) },
    { MP_ROM_QSTR(MP_QSTR_recv_into), MP_ROM_PTR(&socket_recv_into_obj) },
    { MP_ROM_QSTR(MP_QSTR_setsockopt), MP_ROM_PTR(&socket_setsockopt_obj) },
    { MP_ROM_QSTR(MP_QSTR_settimeout), MP_ROM_PTR(&socket_settimeout_obj) },
    { MP_ROM_QSTR(MP_QSTR_setblocking), MP_ROM_PTR(&socket_setblocking_obj) },
};

STATIC MP_DEFINE_CONST_DICT(socket_locals_dict, socket_locals_dict_table);

mp_uint_t socket_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
    mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
    if (request == MP_STREAM_CLOSE) {
        if (self->nic != MP_OBJ_NULL) {
            self->nic_type->close(self);
            self->nic = MP_OBJ_NULL;
        }
        return 0;
    }
    return self->nic_type->ioctl(self, request, arg, errcode);
}

STATIC const mp_stream_p_t socket_stream_p = {
    MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
    .ioctl = socket_ioctl,
    .is_text = false,
};

STATIC const mp_obj_type_t socket_type = {
    { &mp_type_type },
    .name = MP_QSTR_socket,
    .make_new = socket_make_new,
    .protocol = &socket_stream_p,
    .locals_dict = (mp_obj_dict_t*)&socket_locals_dict,
};

//| def getaddrinfo(host: str, port: int) -> Tuple[int, int, int, str, str]:
//|     """Gets the address information for a hostname and port
//|
//|     Returns the appropriate family, socket type, socket protocol and
//|     address information to call socket.socket() and socket.connect() with,
//|     as a tuple."""
//|     ...
//|

STATIC mp_obj_t socket_getaddrinfo(mp_obj_t host_in, mp_obj_t port_in) {
    size_t hlen;
    const char *host = mp_obj_str_get_data(host_in, &hlen);
    mp_int_t port = mp_obj_get_int(port_in);
    uint8_t out_ip[MOD_NETWORK_IPADDR_BUF_SIZE];
    bool have_ip = false;

    if (hlen > 0) {
        // check if host is already in IP form
        nlr_buf_t nlr;
        if (nlr_push(&nlr) == 0) {
            netutils_parse_ipv4_addr(host_in, out_ip, NETUTILS_BIG);
            have_ip = true;
            nlr_pop();
        } else {
            // swallow exception: host was not in IP form so need to do DNS lookup
        }
    }

    if (!have_ip) {
        // find a NIC that can do a name lookup
        for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
            mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
            mod_network_nic_type_t *nic_type = (mod_network_nic_type_t*)mp_obj_get_type(nic);
            if (nic_type->gethostbyname != NULL) {
                int ret = nic_type->gethostbyname(nic, host, hlen, out_ip);
                if (ret != 0) {
                    mp_raise_OSError(ret);
                }
                have_ip = true;
                break;
            }
        }
    }

    if (!have_ip) {
        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, translate("no available NIC")));
    }

    mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(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(out_ip, port, NETUTILS_BIG);
    return mp_obj_new_list(1, (mp_obj_t*)&tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_getaddrinfo_obj, socket_getaddrinfo);

STATIC const mp_rom_map_elem_t socket_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_usocket) },

    { MP_ROM_QSTR(MP_QSTR_socket), MP_ROM_PTR(&socket_type) },
    { MP_ROM_QSTR(MP_QSTR_getaddrinfo), MP_ROM_PTR(&socket_getaddrinfo_obj) },

    // class constants
    { MP_ROM_QSTR(MP_QSTR_AF_INET), MP_ROM_INT(MOD_NETWORK_AF_INET) },
    { MP_ROM_QSTR(MP_QSTR_AF_INET6), MP_ROM_INT(MOD_NETWORK_AF_INET6) },

    { MP_ROM_QSTR(MP_QSTR_SOCK_STREAM), MP_ROM_INT(MOD_NETWORK_SOCK_STREAM) },
    { MP_ROM_QSTR(MP_QSTR_SOCK_DGRAM), MP_ROM_INT(MOD_NETWORK_SOCK_DGRAM) },
    { MP_ROM_QSTR(MP_QSTR_SOCK_RAW), MP_ROM_INT(MOD_NETWORK_SOCK_RAW) },

    /*
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_IP), MP_ROM_INT(MOD_NETWORK_IPPROTO_IP) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_ICMP), MP_ROM_INT(MOD_NETWORK_IPPROTO_ICMP) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_IPV4), MP_ROM_INT(MOD_NETWORK_IPPROTO_IPV4) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_TCP), MP_ROM_INT(MOD_NETWORK_IPPROTO_TCP) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_UDP), MP_ROM_INT(MOD_NETWORK_IPPROTO_UDP) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_IPV6), MP_ROM_INT(MOD_NETWORK_IPPROTO_IPV6) },
    { MP_ROM_QSTR(MP_QSTR_IPPROTO_RAW), MP_ROM_INT(MOD_NETWORK_IPPROTO_RAW) },
    */
};

STATIC MP_DEFINE_CONST_DICT(socket_globals, socket_globals_table);

const mp_obj_module_t socket_module = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t*)&socket_globals,
};