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micropython/unix/modsocket.c

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C
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#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <unistd.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 "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "objtuple.h"
#include "objarray.h"
#include "runtime.h"
#include "stream.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;
// Helper functions
#define RAISE_ERRNO(err_flag, error_val) \
{ if (err_flag == -1) \
{ nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "[Errno %d]", error_val)); } }
STATIC void get_buffer(mp_obj_t obj, buffer_info_t *bufinfo) {
mp_obj_base_t *o = (mp_obj_base_t *)obj;
if (o->type->buffer_p.get_buffer == NULL) {
goto error;
}
o->type->buffer_p.get_buffer(o, bufinfo, BUFFER_READ);
if (bufinfo->buf == NULL) {
goto error;
}
return;
error:
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "Operation not supported"));
}
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;
buffer_info_t bufinfo;
get_buffer(addr_in, &bufinfo);
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;
buffer_info_t bufinfo;
get_buffer(addr_in, &bufinfo);
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);
buf = m_realloc(buf, sz, out_sz);
return MP_OBJ_NEW_QSTR(qstr_from_strn_take(buf, out_sz, out_sz));
}
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]);
}
uint sz;
const char *buf = mp_obj_str_get_data(args[1], &sz);
int out_sz = send(self->fd, buf, sz, 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 {
buffer_info_t bufinfo;
get_buffer(args[3], &bufinfo);
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_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)&mp_identity_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_close), (mp_obj_t)&socket_close_obj },
#if MICROPY_SOCKET_EXTRA
{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&mp_stream_read_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&mp_stream_write_obj },
#endif
};
STATIC MP_DEFINE_CONST_DICT(microsocket_locals_dict, microsocket_locals_dict_table);
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 = {
.read = socket_read,
.write = socket_write,
},
.locals_dict = (mp_obj_t)&microsocket_locals_dict,
};
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_msg(&mp_type_OSError, "Invalid IP address"));
}
return mp_obj_new_int(addr.s_addr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_socket_inet_aton_obj, mod_socket_inet_aton);
#if MICROPY_SOCKET_EXTRA
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) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "[Errno %d]", 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
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) {
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;
#define C(name) { #name, name }
STATIC const struct sym_entry {
const char *sym;
int val;
} constants[] = {
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),
{NULL}
};
#undef C
void microsocket_init() {
mp_obj_t m = mp_obj_new_module(MP_QSTR_microsocket);
mp_store_attr(m, MP_QSTR_socket, (mp_obj_t)&microsocket_type);
#if MICROPY_SOCKET_EXTRA
mp_store_attr(m, MP_QSTR_sockaddr_in, (mp_obj_t)&sockaddr_in_type);
mp_store_attr(m, MP_QSTR_htons, (mp_obj_t)&mod_socket_htons_obj);
mp_store_attr(m, MP_QSTR_inet_aton, (mp_obj_t)&mod_socket_inet_aton_obj);
mp_store_attr(m, MP_QSTR_gethostbyname, (mp_obj_t)&mod_socket_gethostbyname_obj);
#endif
mp_store_attr(m, MP_QSTR_getaddrinfo, (mp_obj_t)&mod_socket_getaddrinfo_obj);
for (const struct sym_entry *p = constants; p->sym != NULL; p++) {
mp_store_attr(m, QSTR_FROM_STR_STATIC(p->sym), MP_OBJ_NEW_SMALL_INT((machine_int_t)p->val));
}
}
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