#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 <alloca.h>

#include "mpconfig.h"

#include "nlr.h"

#include "misc.h"

#include "qstr.h"

#include "obj.h"

#include "objtuple.h"

#include "objarray.h"

#include "runtime.h"

#include "stream.h"

#include "builtin.h"

#define MICROPY_SOCKET_EXTRA (0)

typedef struct _mp_obj_socket_t {

mp_obj_base_t base;

int fd;

} mp_obj_socket_t;

STATIC const mp_obj_type_t microsocket_type;

#define RAISE_ERRNO(err_flag, error_val) \

{ if (err_flag == -1) \

{ nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)error_val))); } }

STATIC mp_obj_socket_t *socket_new(int fd) {

mp_obj_socket_t *o = m_new_obj(mp_obj_socket_t);

o->base.type = &microsocket_type;

o->fd = fd;

return o;

}

STATIC void socket_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {

mp_obj_socket_t *self = self_in;

print(env, "<_socket %d>", self->fd);

}

STATIC machine_int_t socket_read(mp_obj_t o_in, void *buf, machine_uint_t size, int *errcode) {

mp_obj_socket_t *o = o_in;

machine_int_t r = read(o->fd, buf, size);

if (r == -1) {

*errcode = errno;

}

return r;

}

STATIC machine_int_t socket_write(mp_obj_t o_in, const void *buf, machine_uint_t size, int *errcode) {

mp_obj_socket_t *o = o_in;

machine_int_t r = write(o->fd, buf, size);

if (r == -1) {

*errcode = errno;

}

return r;

}

STATIC mp_obj_t socket_close(mp_obj_t self_in) {

mp_obj_socket_t *self = self_in;

close(self->fd);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_close_obj, socket_close);

STATIC mp_obj_t socket_fileno(mp_obj_t self_in) {

mp_obj_socket_t *self = self_in;

return MP_OBJ_NEW_SMALL_INT((machine_int_t)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 = self_in;

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);

int r = connect(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);

RAISE_ERRNO(r, errno);

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 = self_in;

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(addr_in, &bufinfo, MP_BUFFER_READ);

int r = bind(self->fd, (const struct sockaddr *)bufinfo.buf, bufinfo.len);

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 = self_in;

int r = listen(self->fd, MP_OBJ_SMALL_INT_VALUE(backlog_in));

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 = self_in;

struct sockaddr addr;

socklen_t addr_len = sizeof(addr);

int fd = accept(self->fd, &addr, &addr_len);

RAISE_ERRNO(fd, errno);

mp_obj_tuple_t *t = mp_obj_new_tuple(2, NULL);

t->items[0] = socket_new(fd);

t->items[1] = mp_obj_new_bytearray(addr_len, &addr);

return t;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_accept_obj, socket_accept);

STATIC mp_obj_t socket_recv(uint n_args, const mp_obj_t *args) {

mp_obj_socket_t *self = 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]);

}

char *buf = m_new(char, sz);

int out_sz = recv(self->fd, buf, sz, flags);

RAISE_ERRNO(out_sz, errno);

mp_obj_t ret = MP_OBJ_NEW_QSTR(qstr_from_strn(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_send(uint n_args, const mp_obj_t *args) {

mp_obj_socket_t *self = 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);

int out_sz = send(self->fd, bufinfo.buf, bufinfo.len, flags);

RAISE_ERRNO(out_sz, errno);

return MP_OBJ_NEW_SMALL_INT((machine_int_t)out_sz);

}

STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send);

STATIC mp_obj_t socket_setsockopt(uint n_args, const mp_obj_t *args) {

mp_obj_socket_t *self = 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;

if (MP_OBJ_IS_INT(args[3])) {

int val = mp_obj_int_get(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 r = setsockopt(self->fd, level, option, optval, optlen);

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 = self_in;

int val = mp_obj_is_true(flag_in);

int flags = fcntl(self->fd, F_GETFL, 0);

RAISE_ERRNO(flags, errno);

if (val) {

flags &= ~O_NONBLOCK;

} else {

flags |= O_NONBLOCK;

}

flags = fcntl(self->fd, F_SETFL, flags);

RAISE_ERRNO(flags, errno);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);

STATIC mp_obj_t socket_makefile(uint 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 = 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((machine_int_t)self->fd);

return mp_builtin_open(n_args, new_args);

}

STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile);

STATIC mp_obj_t socket_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {

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]);

}

}

}

int fd = socket(family, type, proto);

RAISE_ERRNO(fd, errno);

return socket_new(fd);

}

STATIC const mp_map_elem_t microsocket_locals_dict_table[] = {

{ MP_OBJ_NEW_QSTR(MP_QSTR_fileno), (mp_obj_t)&socket_fileno_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_makefile), (mp_obj_t)&socket_makefile_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_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 },

{ MP_OBJ_NEW_QSTR(MP_QSTR_connect), (mp_obj_t)&socket_connect_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_bind), (mp_obj_t)&socket_bind_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_listen), (mp_obj_t)&socket_listen_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_accept), (mp_obj_t)&socket_accept_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&socket_recv_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&socket_send_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_setsockopt), (mp_obj_t)&socket_setsockopt_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_setblocking), (mp_obj_t)&socket_setblocking_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&socket_close_obj },

};

STATIC MP_DEFINE_CONST_DICT(microsocket_locals_dict, microsocket_locals_dict_table);

STATIC const mp_stream_p_t microsocket_stream_p = {

.read = socket_read,

.write = socket_write,

};

STATIC const mp_obj_type_t microsocket_type = {

{ &mp_type_type },

.name = MP_QSTR_socket,

.print = socket_print,

.make_new = socket_make_new,

.getiter = NULL,

.iternext = NULL,

.stream_p = &microsocket_stream_p,

.locals_dict = (mp_obj_t)&microsocket_locals_dict,

};

#if MICROPY_SOCKET_EXTRA

STATIC mp_obj_t mod_socket_htons(mp_obj_t arg) {

return MP_OBJ_NEW_SMALL_INT((machine_int_t)htons(MP_OBJ_SMALL_INT_VALUE(arg)));

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_htons_obj, mod_socket_htons);

STATIC mp_obj_t mod_socket_inet_aton(mp_obj_t arg) {

assert(MP_OBJ_IS_TYPE(arg, &mp_type_str));

const char *s = mp_obj_str_get_str(arg);

struct in_addr addr;

if (!inet_aton(s, &addr)) {

nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL)));

}

return mp_obj_new_int(addr.s_addr);

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_inet_aton_obj, mod_socket_inet_aton);

STATIC mp_obj_t mod_socket_gethostbyname(mp_obj_t arg) {

assert(MP_OBJ_IS_TYPE(arg, &mp_type_str));

const char *s = mp_obj_str_get_str(arg);

struct hostent *h = gethostbyname(s);

if (h == NULL) {

// CPython: socket.herror

nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)h_errno)));

}

assert(h->h_length == 4);

return mp_obj_new_int(*(int*)*h->h_addr_list);

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_gethostbyname_obj, mod_socket_gethostbyname);

#endif // MICROPY_SOCKET_EXTRA

STATIC mp_obj_t mod_socket_getaddrinfo(uint n_args, const mp_obj_t *args) {

// TODO: Implement all args

assert(n_args == 2);

assert(MP_OBJ_IS_STR(args[0]));

const char *host = mp_obj_str_get_str(args[0]);

const char *serv = NULL;

// 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])) {

int port = (short)MP_OBJ_SMALL_INT_VALUE(args[1]);

char buf[6];

sprintf(buf, "%d", port);

serv = buf;

} else {

serv = mp_obj_str_get_str(args[1]);

}

struct addrinfo hints;

struct addrinfo *addr;

memset(&hints, 0, sizeof(hints));

int res = getaddrinfo(host, serv, NULL/*&hints*/, &addr);

if (res != 0) {

// CPython: socket.gaierror

nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "[addrinfo error %d]", res));

}

assert(addr);

mp_obj_t list = mp_obj_new_list(0, NULL);

for (; addr; addr = addr->ai_next) {

mp_obj_tuple_t *t = mp_obj_new_tuple(5, NULL);

t->items[0] = MP_OBJ_NEW_SMALL_INT((machine_int_t)addr->ai_family);

t->items[1] = MP_OBJ_NEW_SMALL_INT((machine_int_t)addr->ai_socktype);

t->items[2] = MP_OBJ_NEW_SMALL_INT((machine_int_t)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, t);

}

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_microsocket) },

{ MP_OBJ_NEW_QSTR(MP_QSTR_socket), (mp_obj_t)&microsocket_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 },

#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 const mp_obj_dict_t mp_module_socket_globals = {

.base = {&mp_type_dict},

.map = {

.all_keys_are_qstrs = 1,

.table_is_fixed_array = 1,

.used = ARRAY_SIZE(mp_module_socket_globals_table),

.alloc = ARRAY_SIZE(mp_module_socket_globals_table),

.table = (mp_map_elem_t*)mp_module_socket_globals_table,

},

};

const mp_obj_module_t mp_module_socket = {

.base = { &mp_type_module },

.name = MP_QSTR_microsocket,

.globals = (mp_obj_dict_t*)&mp_module_socket_globals,

};