socket.c 11.3 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>

#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
13
#include "qstr.h"
14
15
16
17
18
19
20
21
22
23
24
25
26
#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;

27
static const mp_obj_type_t microsocket_type;
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

// Helper functions
#define RAISE_ERRNO(err_flag, error_val) \
    { if (err_flag == -1) \
        { nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_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_jump(mp_obj_new_exception_msg(MP_QSTR_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);
51
    o->base.type = &microsocket_type;
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
    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);

87
88
89
90
91
92
static mp_obj_t socket_fileno(mp_obj_t self_in) {
    mp_obj_socket_t *self = self_in;
    return MP_OBJ_NEW_SMALL_INT(self->fd);
}
static MP_DEFINE_CONST_FUN_OBJ_1(socket_fileno_obj, socket_fileno);

93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
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);

136
137
138
139
140
141
142
143
144
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]);
    }

145
    char *buf = m_new(char, sz);
146
147
148
    int out_sz = recv(self->fd, buf, sz, flags);
    RAISE_ERRNO(out_sz, errno);

149
150
    buf = m_realloc(buf, sz, out_sz);
    return MP_OBJ_NEW_QSTR(qstr_from_strn_take(buf, out_sz, out_sz));
151
152
153
154
155
156
157
158
159
160
161
}
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]);
    }

162
    uint sz;
163
    const char *buf = mp_obj_str_get_data(args[1], &sz);
164
165
166
    int out_sz = send(self->fd, buf, sz, flags);
    RAISE_ERRNO(out_sz, errno);

167
    return MP_OBJ_NEW_SMALL_INT((machine_int_t)out_sz);
168
169
170
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send);

171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
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);

194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
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);
}

217
static const mp_method_t microsocket_type_methods[] = {
218
        { "fileno", &socket_fileno_obj },
219
220
221
222
223
224
225
226
        { "read", &mp_stream_read_obj },
        { "readall", &mp_stream_readall_obj },
        { "readline", &mp_stream_unbuffered_readline_obj},
        { "write", &mp_stream_write_obj },
        { "connect", &socket_connect_obj },
        { "bind", &socket_bind_obj },
        { "listen", &socket_listen_obj },
        { "accept", &socket_accept_obj },
227
228
        { "recv", &socket_recv_obj },
        { "send", &socket_send_obj },
229
        { "setsockopt", &socket_setsockopt_obj },
230
231
232
233
234
235
236
237
        { "close", &socket_close_obj },
#if MICROPY_SOCKET_EXTRA
        { "recv", &mp_stream_read_obj },
        { "send", &mp_stream_write_obj },
#endif
        { NULL, NULL },
};

238
static const mp_obj_type_t microsocket_type = {
239
240
241
242
243
244
245
246
247
248
    { &mp_const_type },
    "socket",
    .print = socket_print,
    .make_new = socket_make_new,
    .getiter = NULL,
    .iternext = NULL,
    .stream_p = {
        .read = socket_read,
        .write = socket_write,
    },
249
    .methods = microsocket_type_methods,
250
251
252
};

static mp_obj_t mod_socket_htons(mp_obj_t arg) {
253
    return MP_OBJ_NEW_SMALL_INT((machine_int_t)htons(MP_OBJ_SMALL_INT_VALUE(arg)));
254
255
256
257
258
}
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, &str_type));
259
    const char *s = mp_obj_str_get_str(arg);
260
261
262
263
264
265
266
267
268
269
270
271
    struct in_addr addr;
    if (!inet_aton(s, &addr)) {
        nlr_jump(mp_obj_new_exception_msg(MP_QSTR_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, &str_type));
272
    const char *s = mp_obj_str_get_str(arg);
273
274
275
276
277
278
279
280
281
282
    struct hostent *h = gethostbyname(s);
    if (h == NULL) {
        nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_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

283
static mp_obj_t mod_socket_getaddrinfo(uint n_args, const mp_obj_t *args) {
284
285
    // TODO: Implement all args
    assert(n_args == 2);
286
    assert(MP_OBJ_IS_STR(args[0]));
287

288
    const char *host = mp_obj_str_get_str(args[0]);
289
290
291
292
293
294
295
296
297
    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 = MP_OBJ_SMALL_INT_VALUE(args[1]);
        static char buf[20];
        sprintf(buf, "%d", port);
        serv = buf;
    } else {
298
        serv = mp_obj_str_get_str(args[1]);
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
    }

    struct addrinfo hints;
    struct addrinfo *addr;
    memset(&hints, 0, sizeof(hints));
    int res = getaddrinfo(host, serv, NULL/*&hints*/, &addr);

    if (res != 0) {
        nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[addrinfo error %d]", res));
    }
    assert(addr);

    mp_obj_t list = rt_build_list(0, NULL);
    for (; addr; addr = addr->ai_next) {
        mp_obj_tuple_t *t = mp_obj_new_tuple(5, NULL);
314
315
316
        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);
317
318
319
        // "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) {
320
            t->items[3] = MP_OBJ_NEW_QSTR(qstr_from_str(addr->ai_canonname));
321
322
323
324
325
326
327
328
329
330
331
332
        } else {
            t->items[3] = mp_const_none;
        }
        t->items[4] = mp_obj_new_bytearray(addr->ai_addrlen, addr->ai_addr);
        rt_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;

333
334
335
336
337
338
339
340
341
342
343
344
#define C(name) { #name, name }

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),
345
346
347
348
349
350
351
352
353
354
355
356

    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}
357
358
359
};

#undef C
360

361
362
363
void microsocket_init() {
    mp_obj_t m = mp_obj_new_module(MP_QSTR_microsocket);
    rt_store_attr(m, MP_QSTR_socket, (mp_obj_t)&microsocket_type);
364
#if MICROPY_SOCKET_EXTRA
365
366
367
368
    rt_store_attr(m, MP_QSTR_sockaddr_in, (mp_obj_t)&sockaddr_in_type);
    rt_store_attr(m, MP_QSTR_htons, (mp_obj_t)&mod_socket_htons_obj);
    rt_store_attr(m, MP_QSTR_inet_aton, (mp_obj_t)&mod_socket_inet_aton_obj);
    rt_store_attr(m, MP_QSTR_gethostbyname, (mp_obj_t)&mod_socket_gethostbyname_obj);
369
#endif
370
    rt_store_attr(m, MP_QSTR_getaddrinfo, (mp_obj_t)&mod_socket_getaddrinfo_obj);
371
    for (struct sym_entry *p = constants; p->sym != NULL; p++) {
372
        rt_store_attr(m, QSTR_FROM_STR_STATIC(p->sym), MP_OBJ_NEW_SMALL_INT((machine_int_t)p->val));
373
    }
374
}