summaryrefslogtreecommitdiffstats
path: root/src/ctrl/control_if.c
blob: 325caff9e8419afeb596b637f00b1bc9da4c8247 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
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
87
88
89
90
91
92
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
/* SNMP-like status interface
 *
 * (C) 2010-2011 by Daniel Willmann <daniel@totalueberwachung.de>
 * (C) 2010-2011 by On-Waves
 *
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include <arpa/inet.h>

#include <netinet/tcp.h>

#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>

#include <osmocom/ctrl/control_cmd.h>
#include <osmocom/ctrl/control_if.h>

#include <osmocom/core/msgb.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/core/select.h>
#include <osmocom/core/statistics.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/socket.h>

#include <osmocom/gsm/protocol/ipaccess.h>
#include <osmocom/gsm/ipa.h>

#include <osmocom/vty/command.h>
#include <osmocom/vty/vector.h>

vector ctrl_node_vec;

/* Send command to all  */
int ctrl_cmd_send_to_all(struct ctrl_handle *ctrl, struct ctrl_cmd *cmd)
{
	struct ctrl_connection *ccon;
	int ret = 0;

	llist_for_each_entry(ccon, &ctrl->ccon_list, list_entry) {
		if (ccon == cmd->ccon)
			continue;
		if (ctrl_cmd_send(&ccon->write_queue, cmd))
			ret++;
	}
	return ret;
}

int ctrl_cmd_send(struct osmo_wqueue *queue, struct ctrl_cmd *cmd)
{
	int ret;
	struct msgb *msg;

	msg = ctrl_cmd_make(cmd);
	if (!msg) {
		LOGP(DLCTRL, LOGL_ERROR, "Could not generate msg\n");
		return -1;
	}

	ipa_prepend_header_ext(msg, IPAC_PROTO_EXT_CTRL);
	ipa_prepend_header(msg, IPAC_PROTO_OSMO);

	ret = osmo_wqueue_enqueue(queue, msg);
	if (ret != 0) {
		LOGP(DLCTRL, LOGL_ERROR, "Failed to enqueue the command.\n");
		msgb_free(msg);
	}
	return ret;
}

struct ctrl_cmd *ctrl_cmd_trap(struct ctrl_cmd *cmd)
{
	struct ctrl_cmd *trap;

	trap = ctrl_cmd_cpy(cmd, cmd);
	if (!trap)
		return NULL;

	trap->ccon = cmd->ccon;
	trap->type = CTRL_TYPE_TRAP;
	return trap;
}

static void control_close_conn(struct ctrl_connection *ccon)
{
	osmo_wqueue_clear(&ccon->write_queue);
	close(ccon->write_queue.bfd.fd);
	osmo_fd_unregister(&ccon->write_queue.bfd);
	llist_del(&ccon->list_entry);
	if (ccon->closed_cb)
		ccon->closed_cb(ccon);
	msgb_free(ccon->pending_msg);
	talloc_free(ccon);
}

static int handle_control_read(struct osmo_fd * bfd)
{
	int ret = -1;
	struct osmo_wqueue *queue;
	struct ctrl_connection *ccon;
	struct ipaccess_head *iph;
	struct ipaccess_head_ext *iph_ext;
	struct msgb *msg = NULL;
	struct ctrl_cmd *cmd;
	struct ctrl_handle *ctrl = bfd->data;

	queue = container_of(bfd, struct osmo_wqueue, bfd);
	ccon = container_of(queue, struct ctrl_connection, write_queue);

	ret = ipa_msg_recv_buffered(bfd->fd, &msg, &ccon->pending_msg);
	if (ret <= 0) {
		if (ret == -EAGAIN)
			return 0;
		if (ret == 0)
			LOGP(DLCTRL, LOGL_INFO, "The control connection was closed\n");
		else
			LOGP(DLCTRL, LOGL_ERROR, "Failed to parse ip access message: %d\n", ret);

		goto err;
	}

	if (msg->len < sizeof(*iph) + sizeof(*iph_ext)) {
		LOGP(DLCTRL, LOGL_ERROR, "The message is too short.\n");
		goto err;
	}

	iph = (struct ipaccess_head *) msg->data;
	if (iph->proto != IPAC_PROTO_OSMO) {
		LOGP(DLCTRL, LOGL_ERROR, "Protocol mismatch. We got 0x%x\n", iph->proto);
		goto err;
	}

	iph_ext = (struct ipaccess_head_ext *) iph->data;
	if (iph_ext->proto != IPAC_PROTO_EXT_CTRL) {
		LOGP(DLCTRL, LOGL_ERROR, "Extended protocol mismatch. We got 0x%x\n", iph_ext->proto);
		goto err;
	}

	msg->l2h = iph_ext->data;

	cmd = ctrl_cmd_parse(ccon, msg);

	if (cmd) {
		cmd->ccon = ccon;
		if (ctrl->handler(cmd, ctrl->gsmnet) != CTRL_CMD_HANDLED) {
			ctrl_cmd_send(queue, cmd);
			talloc_free(cmd);
		}
	} else {
		cmd = talloc_zero(ccon, struct ctrl_cmd);
		if (!cmd)
			goto err;
		LOGP(DLCTRL, LOGL_ERROR, "Command parser error.\n");
		cmd->type = CTRL_TYPE_ERROR;
		cmd->id = "err";
		cmd->reply = "Command parser error.";
		ctrl_cmd_send(queue, cmd);
		talloc_free(cmd);
	}

	msgb_free(msg);
	return 0;

err:
	control_close_conn(ccon);
	msgb_free(msg);
	return ret;
}

static int control_write_cb(struct osmo_fd *bfd, struct msgb *msg)
{
	int rc;

	rc = write(bfd->fd, msg->data, msg->len);
	if (rc != msg->len)
		LOGP(DLCTRL, LOGL_ERROR, "Failed to write message to the control connection.\n");

	return rc;
}

static struct ctrl_connection *ctrl_connection_alloc(void *ctx)
{
	struct ctrl_connection *ccon = talloc_zero(ctx, struct ctrl_connection);
	if (!ccon)
		return NULL;

	osmo_wqueue_init(&ccon->write_queue, 100);
	/* Error handling here? */

	INIT_LLIST_HEAD(&ccon->cmds);
	return ccon;
}

static int listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what)
{
	int ret, fd, on;
	struct ctrl_handle *ctrl;
	struct ctrl_connection *ccon;
	struct sockaddr_in sa;
	socklen_t sa_len = sizeof(sa);


	if (!(what & BSC_FD_READ))
		return 0;

	fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
	if (fd < 0) {
		perror("accept");
		return fd;
	}
	LOGP(DLCTRL, LOGL_INFO, "accept()ed new control connection from %s\n",
		inet_ntoa(sa.sin_addr));

	on = 1;
	ret = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
	if (ret != 0) {
		LOGP(DLCTRL, LOGL_ERROR, "Failed to set TCP_NODELAY: %s\n", strerror(errno));
		close(fd);
		return ret;
	}
	ccon = ctrl_connection_alloc(listen_bfd->data);
	if (!ccon) {
		LOGP(DLCTRL, LOGL_ERROR, "Failed to allocate.\n");
		close(fd);
		return -1;
	}

	ctrl = listen_bfd->data;
	ccon->write_queue.bfd.data = ctrl;
	ccon->write_queue.bfd.fd = fd;
	ccon->write_queue.bfd.when = BSC_FD_READ;
	ccon->write_queue.read_cb = handle_control_read;
	ccon->write_queue.write_cb = control_write_cb;

	ret = osmo_fd_register(&ccon->write_queue.bfd);
	if (ret < 0) {
		LOGP(DLCTRL, LOGL_ERROR, "Could not register FD.\n");
		close(ccon->write_queue.bfd.fd);
		talloc_free(ccon);
	}

	llist_add(&ccon->list_entry, &ctrl->ccon_list);

	return ret;
}

static uint64_t get_rate_ctr_value(const struct rate_ctr *ctr, int intv)
{
	if (intv >= RATE_CTR_INTV_NUM)
		return 0;

	/* Absolute value */
	if (intv == -1) {
		return  ctr->current;
	} else {
		return ctr->intv[intv].rate;
	}
}

static char *get_all_rate_ctr_in_group(void *ctx, const struct rate_ctr_group *ctrg, int intv)
{
	int i;
	char *counters = talloc_strdup(ctx, "");
	if (!counters)
		return NULL;

	for (i=0;i<ctrg->desc->num_ctr;i++) {
		counters = talloc_asprintf_append(counters, "\n%s.%u.%s %"PRIu64,
			ctrg->desc->group_name_prefix, ctrg->idx,
			ctrg->desc->ctr_desc[i].name,
			get_rate_ctr_value(&ctrg->ctr[i], intv));
		if (!counters)
			return NULL;
	}
	return counters;
}

static int get_rate_ctr_group(const char *ctr_group, int intv, struct ctrl_cmd *cmd)
{
	int i;
	char *counters;
	struct rate_ctr_group *ctrg;

	cmd->reply = talloc_asprintf(cmd, "All counters in group %s", ctr_group);
	if (!cmd->reply)
		goto oom;

	for (i=0;;i++) {
		ctrg = rate_ctr_get_group_by_name_idx(ctr_group, i);
		if (!ctrg)
			break;

		counters = get_all_rate_ctr_in_group(cmd, ctrg, intv);
		if (!counters)
			goto oom;

		cmd->reply = talloc_asprintf_append(cmd->reply, "%s", counters);
		talloc_free(counters);
		if (!cmd->reply)
			goto oom;
	}

	/* We found no counter group by that name */
	if (i == 0) {
		cmd->reply = talloc_asprintf(cmd, "No counter group with name %s.", ctr_group);
		return CTRL_CMD_ERROR;
	}

	return CTRL_CMD_REPLY;
oom:
	cmd->reply = "OOM.";
	return CTRL_CMD_ERROR;
}

static int get_rate_ctr_group_idx(const struct rate_ctr_group *ctrg, int intv, struct ctrl_cmd *cmd)
{
	char *counters;

	counters = get_all_rate_ctr_in_group(cmd, ctrg, intv);
	if (!counters)
		goto oom;

	cmd->reply = talloc_asprintf(cmd, "All counters in %s.%u%s",
			ctrg->desc->group_name_prefix, ctrg->idx, counters);
	talloc_free(counters);
	if (!cmd->reply)
		goto oom;

	return CTRL_CMD_REPLY;
oom:
	cmd->reply = "OOM.";
	return CTRL_CMD_ERROR;
}

/* rate_ctr */
CTRL_CMD_DEFINE(rate_ctr, "rate_ctr *");
static int get_rate_ctr(struct ctrl_cmd *cmd, void *data)
{
	int intv;
	unsigned int idx;
	char *ctr_group, *ctr_idx, *ctr_name, *tmp, *dup, *saveptr, *interval;
	struct rate_ctr_group *ctrg;
	const struct rate_ctr *ctr;

	dup = talloc_strdup(cmd, cmd->variable);
	if (!dup)
		goto oom;

	/* Skip over possible prefixes (net.) */
	tmp = strstr(dup, "rate_ctr");
	if (!tmp) {
		talloc_free(dup);
		cmd->reply = "rate_ctr not a token in rate_ctr command!";
		goto err;
	}

	strtok_r(tmp, ".", &saveptr);
	interval = strtok_r(NULL, ".", &saveptr);
	if (!interval) {
		talloc_free(dup);
		cmd->reply = "Missing interval.";
		goto err;
	}

	if (!strcmp(interval, "abs")) {
		intv = -1;
	} else if (!strcmp(interval, "per_sec")) {
		intv = RATE_CTR_INTV_SEC;
	} else if (!strcmp(interval, "per_min")) {
		intv = RATE_CTR_INTV_MIN;
	} else if (!strcmp(interval, "per_hour")) {
		intv = RATE_CTR_INTV_HOUR;
	} else if (!strcmp(interval, "per_day")) {
		intv = RATE_CTR_INTV_DAY;
	} else {
		talloc_free(dup);
		cmd->reply = "Wrong interval.";
		goto err;
	}

	ctr_group = strtok_r(NULL, ".", &saveptr);
	tmp = strtok_r(NULL, ".", &saveptr);
	if (!ctr_group || !tmp) {
		talloc_free(dup);
		cmd->reply = "Counter group must be of form a.b";
		goto err;
	}
	ctr_group[strlen(ctr_group)] = '.';

	ctr_idx = strtok_r(NULL, ".", &saveptr);
	if (!ctr_idx) {
		talloc_free(dup);
		return get_rate_ctr_group(ctr_group, intv, cmd);
	}
	idx = atoi(ctr_idx);

	ctrg = rate_ctr_get_group_by_name_idx(ctr_group, idx);
	if (!ctrg) {
		talloc_free(dup);
		cmd->reply = "Counter group not found.";
		goto err;
	}

	ctr_name = strtok_r(NULL, "\0", &saveptr);
	if (!ctr_name) {
		talloc_free(dup);
		return get_rate_ctr_group_idx(ctrg, intv, cmd);
	}

	ctr = rate_ctr_get_by_name(ctrg, ctr_name);
	if (!ctr) {
		cmd->reply = "Counter name not found.";
		talloc_free(dup);
		goto err;
	}

	talloc_free(dup);

	cmd->reply = talloc_asprintf(cmd, "%"PRIu64, get_rate_ctr_value(ctr, intv));
	if (!cmd->reply)
		goto oom;

	return CTRL_CMD_REPLY;
oom:
	cmd->reply = "OOM";
err:
	return CTRL_CMD_ERROR;
}

static int set_rate_ctr(struct ctrl_cmd *cmd, void *data)
{
	cmd->reply = "Can't set rate counter.";

	return CTRL_CMD_ERROR;
}

static int verify_rate_ctr(struct ctrl_cmd *cmd, const char *value, void *data)
{
	return 0;
}

/* counter */
CTRL_CMD_DEFINE(counter, "counter *");
static int get_counter(struct ctrl_cmd *cmd, void *data)
{
	char *ctr_name, *tmp, *dup, *saveptr;
	struct osmo_counter *counter;

	cmd->reply = "OOM";
	dup = talloc_strdup(cmd, cmd->variable);
	if (!dup)
		goto err;


	tmp = strstr(dup, "counter");
	if (!tmp) {
		talloc_free(dup);
		goto err;
	}

	strtok_r(tmp, ".", &saveptr);
	ctr_name = strtok_r(NULL, "\0", &saveptr);

	if (!ctr_name)
		goto err;

	counter = osmo_counter_get_by_name(ctr_name);
	if (!counter) {
		cmd->reply = "Counter name not found.";
		talloc_free(dup);
		goto err;
	}

	talloc_free(dup);

	cmd->reply = talloc_asprintf(cmd, "%lu", counter->value);
	if (!cmd->reply) {
		cmd->reply = "OOM";
		goto err;
	}

	return CTRL_CMD_REPLY;
err:
	return CTRL_CMD_ERROR;
}

static int set_counter(struct ctrl_cmd *cmd, void *data)
{

	cmd->reply = "Can't set counter.";

	return CTRL_CMD_ERROR;
}

static int verify_counter(struct ctrl_cmd *cmd, const char *value, void *data)
{
	return 0;
}

struct ctrl_handle *controlif_setup(struct gsm_network *gsmnet, uint16_t port,
					ctrl_cmd_handler handler)
{
	int ret;
	struct ctrl_handle *ctrl;

	ctrl = talloc_zero(gsmnet, struct ctrl_handle);
	if (!ctrl)
		return NULL;

	INIT_LLIST_HEAD(&ctrl->ccon_list);

	ctrl->gsmnet = gsmnet;
	ctrl->handler = handler;

	ctrl_node_vec = vector_init(5);
	if (!ctrl_node_vec)
		goto err;

	/* Listen for control connections */
	ctrl->listen_fd.cb = listen_fd_cb;
	ctrl->listen_fd.data = ctrl;
	ret = osmo_sock_init_ofd(&ctrl->listen_fd, AF_INET, SOCK_STREAM, IPPROTO_TCP,
				 "127.0.0.1", port, OSMO_SOCK_F_BIND);
	if (ret < 0)
		goto err_vec;

	ret = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_rate_ctr);
	if (ret)
		goto err_vec;
	ret = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_counter);
	if (ret)
		goto err_vec;

	return ctrl;
err_vec:
	vector_free(ctrl_node_vec);
	ctrl_node_vec = NULL;
err:
	talloc_free(ctrl);
	return NULL;
}