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network: downgrade log level in conf parsers
[thirdparty/systemd.git] / src / network / netdev / l2tp-tunnel.c
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3a56e697
SS		 1/* SPDX-License-Identifier: LGPL-2.1+ */
2
9aa5d8ba 3#include <netinet/in.h>
3a56e697
SS		 4#include <linux/l2tp.h>
5#include <linux/genetlink.h>
6
3a56e697
SS		 7#include "conf-parser.h"
8#include "hashmap.h"
9#include "l2tp-tunnel.h"
3a56e697 10#include "netlink-util.h"
d053d08a 11#include "networkd-address.h"
3a56e697
SS		 12#include "networkd-manager.h"
13#include "parse-util.h"
14#include "socket-util.h"
15#include "string-table.h"
16#include "string-util.h"
17#include "util.h"
18
19static const char* const l2tp_l2spec_type_table[_NETDEV_L2TP_L2SPECTYPE_MAX] = {
20 [NETDEV_L2TP_L2SPECTYPE_NONE] = "none",
21 [NETDEV_L2TP_L2SPECTYPE_DEFAULT] = "default",
22};
23
24DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_l2spec_type, L2tpL2specType);
25
26static const char* const l2tp_encap_type_table[_NETDEV_L2TP_ENCAPTYPE_MAX] = {
27 [NETDEV_L2TP_ENCAPTYPE_UDP] = "udp",
28 [NETDEV_L2TP_ENCAPTYPE_IP] = "ip",
29};
30
31DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_encap_type, L2tpEncapType);
32DEFINE_CONFIG_PARSE_ENUM(config_parse_l2tp_encap_type, l2tp_encap_type, L2tpEncapType, "Failed to parse L2TP Encapsulation Type");
33
d053d08a
YW		 34static const char* const l2tp_local_address_type_table[_NETDEV_L2TP_LOCAL_ADDRESS_MAX] = {
35 [NETDEV_L2TP_LOCAL_ADDRESS_AUTO] = "auto",
36 [NETDEV_L2TP_LOCAL_ADDRESS_STATIC] = "static",
37 [NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC] = "dynamic",
38};
39
40DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_local_address_type, L2tpLocalAddressType);
41
3a56e697
SS		 42static void l2tp_session_free(L2tpSession *s) {
43 if (!s)
44 return;
45
46 if (s->tunnel && s->section)
a1422af5 47 ordered_hashmap_remove(s->tunnel->sessions_by_section, s->section);
3a56e697
SS		 48
49 network_config_section_free(s->section);
50
51 free(s->name);
52
53 free(s);
54}
55
56DEFINE_NETWORK_SECTION_FUNCTIONS(L2tpSession, l2tp_session_free);
57
58static int l2tp_session_new_static(L2tpTunnel *t, const char *filename, unsigned section_line, L2tpSession **ret) {
59 _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
60 _cleanup_(l2tp_session_freep) L2tpSession *s = NULL;
61 int r;
62
63 assert(t);
64 assert(ret);
65 assert(filename);
66 assert(section_line > 0);
67
68 r = network_config_section_new(filename, section_line, &n);
69 if (r < 0)
70 return r;
71
72 s = ordered_hashmap_get(t->sessions_by_section, n);
73 if (s) {
74 *ret = TAKE_PTR(s);
75 return 0;
76 }
77
78 s = new(L2tpSession, 1);
79 if (!s)
80 return -ENOMEM;
81
82 *s = (L2tpSession) {
83 .l2tp_l2spec_type = NETDEV_L2TP_L2SPECTYPE_DEFAULT,
84 .tunnel = t,
85 .section = TAKE_PTR(n),
86 };
87
88 r = ordered_hashmap_ensure_allocated(&t->sessions_by_section, &network_config_hash_ops);
89 if (r < 0)
90 return r;
91
92 r = ordered_hashmap_put(t->sessions_by_section, s->section, s);
93 if (r < 0)
94 return r;
95
96 *ret = TAKE_PTR(s);
97 return 0;
98}
99
d053d08a 100static int netdev_l2tp_fill_message_tunnel(NetDev *netdev, union in_addr_union *local_address, sd_netlink_message **ret) {
3a56e697
SS		 101 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
102 uint16_t encap_type;
103 L2tpTunnel *t;
104 int r;
105
106 assert(netdev);
d053d08a 107 assert(local_address);
3a56e697
SS		 108
109 t = L2TP(netdev);
110
111 assert(t);
112
113 r = sd_genl_message_new(netdev->manager->genl, SD_GENL_L2TP, L2TP_CMD_TUNNEL_CREATE, &m);
114 if (r < 0)
115 return log_netdev_error_errno(netdev, r, "Failed to create generic netlink message: %m");
116
117 r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, t->tunnel_id);
118 if (r < 0)
119 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_CONN_ID attribute: %m");
120
121 r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, t->peer_tunnel_id);
122 if (r < 0)
123 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_CONN_ID attribute: %m");
124
125 r = sd_netlink_message_append_u8(m, L2TP_ATTR_PROTO_VERSION, 3);
126 if (r < 0)
127 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PROTO_VERSION attribute: %m");
128
129 switch(t->l2tp_encap_type) {
130 case NETDEV_L2TP_ENCAPTYPE_IP:
131 encap_type = L2TP_ENCAPTYPE_IP;
132 break;
133 case NETDEV_L2TP_ENCAPTYPE_UDP:
134 default:
135 encap_type = L2TP_ENCAPTYPE_UDP;
136 break;
137 }
138
139 r = sd_netlink_message_append_u16(m, L2TP_ATTR_ENCAP_TYPE, encap_type);
140 if (r < 0)
141 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_ENCAP_TYPE attribute: %m");
142
143 if (t->family == AF_INET) {
d053d08a 144 r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_SADDR, &local_address->in);
3a56e697
SS		 145 if (r < 0)
146 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP_SADDR attribute: %m");
147
148 r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_DADDR, &t->remote.in);
149 if (r < 0)
150 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP_DADDR attribute: %m");
151 } else {
d053d08a 152 r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_SADDR, &local_address->in6);
3a56e697
SS		 153 if (r < 0)
154 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP6_SADDR attribute: %m");
155
156 r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_DADDR, &t->remote.in6);
157 if (r < 0)
158 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP6_DADDR attribute: %m");
159 }
160
161 if (encap_type == L2TP_ENCAPTYPE_UDP) {
162 r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_SPORT, t->l2tp_udp_sport);
163 if (r < 0)
164 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_SPORT, attribute: %m");
165
166 r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_DPORT, t->l2tp_udp_dport);
167 if (r < 0)
168 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_DPORT attribute: %m");
169
170 if (t->udp_csum) {
171 r = sd_netlink_message_append_u8(m, L2TP_ATTR_UDP_CSUM, t->udp_csum);
172 if (r < 0)
173 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_CSUM attribute: %m");
174 }
175
176 if (t->udp6_csum_tx) {
177 r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_TX);
178 if (r < 0)
179 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_ZERO_CSUM6_TX attribute: %m");
180 }
181
182 if (t->udp6_csum_rx) {
183 r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_RX);
184 if (r < 0)
185 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_ZERO_CSUM6_RX attribute: %m");
186 }
187 }
188
189 *ret = TAKE_PTR(m);
190
191 return 0;
192}
193
194static int netdev_l2tp_fill_message_session(NetDev *netdev, L2tpSession *session, sd_netlink_message **ret) {
195 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
196 uint16_t l2_spec_len;
197 uint8_t l2_spec_type;
198 int r;
199
200 assert(netdev);
201 assert(session);
202 assert(session->tunnel);
203
204 r = sd_genl_message_new(netdev->manager->genl, SD_GENL_L2TP, L2TP_CMD_SESSION_CREATE, &m);
205 if (r < 0)
206 return log_netdev_error_errno(netdev, r, "Failed to create generic netlink message: %m");
207
208 r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, session->tunnel->tunnel_id);
209 if (r < 0)
210 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_CONN_ID attribute: %m");
211
212 r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, session->tunnel->peer_tunnel_id);
213 if (r < 0)
214 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_CONN_ID attribute: %m");
215
216 r = sd_netlink_message_append_u32(m, L2TP_ATTR_SESSION_ID, session->session_id);
217 if (r < 0)
218 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_SESSION_ID attribute: %m");
219
220 r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id);
221 if (r < 0)
222 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_SESSION_ID attribute: %m");
223
224 r = sd_netlink_message_append_u16(m, L2TP_ATTR_PW_TYPE, L2TP_PWTYPE_ETH);
225 if (r < 0)
226 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PW_TYPE attribute: %m");
227
228 switch (session->l2tp_l2spec_type) {
229 case NETDEV_L2TP_L2SPECTYPE_NONE:
230 l2_spec_type = L2TP_L2SPECTYPE_NONE;
231 l2_spec_len = 0;
232 break;
233 case NETDEV_L2TP_L2SPECTYPE_DEFAULT:
234 default:
235 l2_spec_type = L2TP_L2SPECTYPE_DEFAULT;
236 l2_spec_len = 4;
237 break;
238 }
239
240 r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_TYPE, l2_spec_type);
241 if (r < 0)
242 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_L2SPEC_TYPE attribute: %m");
243
244 r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_LEN, l2_spec_len);
245 if (r < 0)
246 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_L2SPEC_LEN attribute: %m");
247
248 r = sd_netlink_message_append_string(m, L2TP_ATTR_IFNAME, session->name);
249 if (r < 0)
250 return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IFNAME attribute: %m");
251
252 *ret = TAKE_PTR(m);
253
254 return 0;
255}
256
d053d08a
YW		 257static int l2tp_acquire_local_address_one(L2tpTunnel *t, Address *a, union in_addr_union *ret) {
258 if (a->family != t->family)
259 return -EINVAL;
260
261 if (in_addr_is_null(a->family, &a->in_addr_peer) <= 0)
262 return -EINVAL;
263
264 if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_STATIC &&
265 !FLAGS_SET(a->flags, IFA_F_PERMANENT))
266 return -EINVAL;
267
268 if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC &&
269 FLAGS_SET(a->flags, IFA_F_PERMANENT))
270 return -EINVAL;
271
272 *ret = a->in_addr;
273 return 0;
274}
275
276static int l2tp_acquire_local_address(L2tpTunnel *t, Link *link, union in_addr_union *ret) {
277 Address *a;
278 Iterator i;
279
280 assert(t);
281 assert(link);
282 assert(ret);
283 assert(IN_SET(t->family, AF_INET, AF_INET6));
284
285 if (!in_addr_is_null(t->family, &t->local)) {
286 /* local address is explicitly specified. */
287 *ret = t->local;
288 return 0;
289 }
290
291 SET_FOREACH(a, link->addresses, i)
292 if (l2tp_acquire_local_address_one(t, a, ret) >= 0)
293 return 1;
294
295 SET_FOREACH(a, link->addresses_foreign, i)
296 if (l2tp_acquire_local_address_one(t, a, ret) >= 0)
297 return 1;
298
299 return -ENODATA;
300}
301
3a27af62
YW		 302static void l2tp_session_destroy_callback(L2tpSession *session) {
303 if (!session)
304 return;
305
306 netdev_unref(NETDEV(session->tunnel));
307}
308
309static int l2tp_create_session_handler(sd_netlink *rtnl, sd_netlink_message *m, L2tpSession *session) {
310 NetDev *netdev;
311 int r;
312
313 assert(session);
314 assert(session->tunnel);
315
316 netdev = NETDEV(session->tunnel);
317
318 r = sd_netlink_message_get_errno(m);
319 if (r == -EEXIST)
320 log_netdev_info(netdev, "L2TP session %s exists, using existing without changing its parameters",
321 session->name);
322 else if (r < 0) {
323 log_netdev_warning_errno(netdev, r, "L2TP session %s could not be created: %m", session->name);
324 return 1;
325 }
326
327 log_netdev_debug(netdev, "L2TP session %s created", session->name);
328 return 1;
329}
330
331static int l2tp_create_session(NetDev *netdev, L2tpSession *session) {
332 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *n = NULL;
333 int r;
334
335 r = netdev_l2tp_fill_message_session(netdev, session, &n);
336 if (r < 0)
337 return r;
338
339 r = netlink_call_async(netdev->manager->genl, NULL, n, l2tp_create_session_handler,
340 l2tp_session_destroy_callback, session);
341 if (r < 0)
342 return log_netdev_error_errno(netdev, r, "Failed to create L2TP session %s: %m", session->name);
343
344 netdev_ref(netdev);
345 return 0;
346}
347
348static int l2tp_create_tunnel_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
349 L2tpSession *session;
350 L2tpTunnel *t;
351 Iterator i;
352 int r;
353
354 assert(netdev);
355 assert(netdev->state != _NETDEV_STATE_INVALID);
356
357 t = L2TP(netdev);
358
359 assert(t);
360
361 r = sd_netlink_message_get_errno(m);
362 if (r == -EEXIST)
363 log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
364 else if (r < 0) {
365 log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
366 netdev_drop(netdev);
367
368 return 1;
369 }
370
371 log_netdev_debug(netdev, "L2TP tunnel is created");
372
373 ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section, i)
374 (void) l2tp_create_session(netdev, session);
375
376 return 1;
377}
378
379static int l2tp_create_tunnel(NetDev *netdev, Link *link) {
3a56e697 380 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
d053d08a 381 union in_addr_union local_address;
3a56e697 382 L2tpTunnel *t;
3a56e697
SS		 383 int r;
384
385 assert(netdev);
386
387 t = L2TP(netdev);
388
389 assert(t);
390
d053d08a
YW		 391 r = l2tp_acquire_local_address(t, link, &local_address);
392 if (r < 0)
393 return log_netdev_error_errno(netdev, r, "Could not find local address.");
394
395 if (r > 0 && DEBUG_LOGGING) {
396 _cleanup_free_ char *str = NULL;
397
398 (void) in_addr_to_string(t->family, &local_address, &str);
399 log_netdev_debug(netdev, "Local address %s acquired.", strna(str));
400 }
401
402 r = netdev_l2tp_fill_message_tunnel(netdev, &local_address, &m);
3a56e697
SS		 403 if (r < 0)
404 return r;
405
3a27af62
YW		 406 r = netlink_call_async(netdev->manager->genl, NULL, m, l2tp_create_tunnel_handler,
407 netdev_destroy_callback, netdev);
3a56e697
SS		 408 if (r < 0)
409 return log_netdev_error_errno(netdev, r, "Failed to create L2TP tunnel: %m");
410
3a27af62 411 netdev_ref(netdev);
3a56e697
SS		 412
413 return 0;
414}
415
416int config_parse_l2tp_tunnel_address(
417 const char *unit,
418 const char *filename,
419 unsigned line,
420 const char *section,
421 unsigned section_line,
422 const char *lvalue,
423 int ltype,
424 const char *rvalue,
425 void *data,
426 void *userdata) {
427
428 L2tpTunnel *t = userdata;
429 union in_addr_union *addr = data;
430 int r;
431
432 assert(filename);
433 assert(lvalue);
434 assert(rvalue);
435 assert(data);
436
d053d08a
YW		 437 if (streq(lvalue, "Local")) {
438 L2tpLocalAddressType addr_type;
439
440 if (isempty(rvalue))
441 addr_type = NETDEV_L2TP_LOCAL_ADDRESS_AUTO;
442 else
443 addr_type = l2tp_local_address_type_from_string(rvalue);
444
445 if (addr_type >= 0) {
446 if (in_addr_is_null(t->family, &t->remote) != 0)
447 /* If Remote= is not specified yet, then also clear family. */
448 t->family = AF_UNSPEC;
449
450 t->local = IN_ADDR_NULL;
451 t->local_address_type = addr_type;
452
453 return 0;
454 }
455 }
456
3a56e697
SS		 457 if (t->family == AF_UNSPEC)
458 r = in_addr_from_string_auto(rvalue, &t->family, addr);
459 else
460 r = in_addr_from_string(t->family, rvalue, addr);
461 if (r < 0) {
d96edb2c 462 log_syntax(unit, LOG_WARNING, filename, line, r,
3a56e697
SS		 463 "Invalid L2TP Tunnel address specified in %s='%s', ignoring assignment: %m", lvalue, rvalue);
464 return 0;
465 }
466
467 return 0;
468}
469
470int config_parse_l2tp_tunnel_id(
471 const char *unit,
472 const char *filename,
473 unsigned line,
474 const char *section,
475 unsigned section_line,
476 const char *lvalue,
477 int ltype,
478 const char *rvalue,
479 void *data,
480 void *userdata) {
481
482 uint32_t *id = data, k;
483 int r;
484
485 assert(filename);
486 assert(lvalue);
487 assert(rvalue);
488 assert(data);
489
490 r = safe_atou32(rvalue, &k);
491 if (r < 0) {
d96edb2c 492 log_syntax(unit, LOG_WARNING, filename, line, r,
3a56e697
SS		 493 "Failed to parse L2TP tunnel id. Ignoring assignment: %s", rvalue);
494 return 0;
495 }
496
497 if (k == 0) {
d96edb2c 498 log_syntax(unit, LOG_WARNING, filename, line, 0,
3a56e697
SS		 499 "Invalid L2TP tunnel id. Ignoring assignment: %s", rvalue);
500 return 0;
501 }
502
503 *id = k;
504
505 return 0;
506}
507
508int config_parse_l2tp_session_id(
509 const char *unit,
510 const char *filename,
511 unsigned line,
512 const char *section,
513 unsigned section_line,
514 const char *lvalue,
515 int ltype,
516 const char *rvalue,
517 void *data,
518 void *userdata) {
519
520 _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
521 L2tpTunnel *t = userdata;
522 uint32_t k;
523 int r;
524
525 assert(filename);
526 assert(section);
527 assert(lvalue);
528 assert(rvalue);
529 assert(data);
530
531 r = l2tp_session_new_static(t, filename, section_line, &session);
532 if (r < 0)
d96edb2c 533 return log_oom();
3a56e697
SS		 534
535 r = safe_atou32(rvalue, &k);
536 if (r < 0) {
d96edb2c 537 log_syntax(unit, LOG_WARNING, filename, line, r,
3a56e697
SS		 538 "Failed to parse L2TP session id. Ignoring assignment: %s", rvalue);
539 return 0;
540 }
541
542 if (k == 0) {
d96edb2c 543 log_syntax(unit, LOG_WARNING, filename, line, 0,
3a56e697
SS		 544 "Invalid L2TP session id. Ignoring assignment: %s", rvalue);
545 return 0;
546 }
547
548 if (streq(lvalue, "SessionId"))
549 session->session_id = k;
550 else
551 session->peer_session_id = k;
552
553 session = NULL;
554 return 0;
555}
556
557int config_parse_l2tp_session_l2spec(
558 const char *unit,
559 const char *filename,
560 unsigned line,
561 const char *section,
562 unsigned section_line,
563 const char *lvalue,
564 int ltype,
565 const char *rvalue,
566 void *data,
567 void *userdata) {
568
569 _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
570 L2tpTunnel *t = userdata;
571 L2tpL2specType spec;
572 int r;
573
574 assert(filename);
575 assert(section);
576 assert(lvalue);
577 assert(rvalue);
578 assert(data);
579
580 r = l2tp_session_new_static(t, filename, section_line, &session);
581 if (r < 0)
d96edb2c 582 return log_oom();
3a56e697
SS		 583
584 spec = l2tp_l2spec_type_from_string(rvalue);
585 if (spec < 0) {
d96edb2c 586 log_syntax(unit, LOG_WARNING, filename, line, 0,
3a56e697
SS		 587 "Failed to parse layer2 specific header type. Ignoring assignment: %s", rvalue);
588 return 0;
589 }
590
591 session->l2tp_l2spec_type = spec;
592
593 session = NULL;
594 return 0;
595}
596
597int config_parse_l2tp_session_name(
598 const char *unit,
599 const char *filename,
600 unsigned line,
601 const char *section,
602 unsigned section_line,
603 const char *lvalue,
604 int ltype,
605 const char *rvalue,
606 void *data,
607 void *userdata) {
608
609 _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
610 L2tpTunnel *t = userdata;
611 int r;
612
613 assert(filename);
614 assert(section);
615 assert(lvalue);
616 assert(rvalue);
617 assert(data);
618
619 r = l2tp_session_new_static(t, filename, section_line, &session);
620 if (r < 0)
d96edb2c 621 return log_oom();
3a56e697
SS		 622
623 if (!ifname_valid(rvalue)) {
d96edb2c 624 log_syntax(unit, LOG_WARNING, filename, line, 0,
3a56e697
SS		 625 "Failed to parse L2TP tunnel session name. Ignoring assignment: %s", rvalue);
626 return 0;
627 }
628
50969cff
YW		 629 r = free_and_strdup(&session->name, rvalue);
630 if (r < 0)
631 return log_oom();
3a56e697
SS		 632
633 session = NULL;
634 return 0;
635}
636
637static void l2tp_tunnel_init(NetDev *netdev) {
638 L2tpTunnel *t;
639
640 assert(netdev);
641
642 t = L2TP(netdev);
643
644 assert(t);
645
646 t->l2tp_encap_type = NETDEV_L2TP_ENCAPTYPE_UDP;
647 t->udp6_csum_rx = true;
648 t->udp6_csum_tx = true;
649}
650
651static int l2tp_session_verify(L2tpSession *session) {
652 NetDev *netdev;
653
654 assert(session);
655 assert(session->tunnel);
656
657 netdev = NETDEV(session->tunnel);
658
659 if (section_is_invalid(session->section))
660 return -EINVAL;
661
662 if (!session->name)
663 return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
664 "%s: L2TP session without name configured. "
665 "Ignoring [L2TPSession] section from line %u",
666 session->section->filename, session->section->line);
667
668 if (session->session_id == 0 || session->peer_session_id == 0)
669 return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
670 "%s: L2TP session without session IDs configured. "
671 "Ignoring [L2TPSession] section from line %u",
672 session->section->filename, session->section->line);
673
674 return 0;
675}
676
677static int netdev_l2tp_tunnel_verify(NetDev *netdev, const char *filename) {
678 L2tpTunnel *t;
679 L2tpSession *session;
680 Iterator i;
681
682 assert(netdev);
683 assert(filename);
684
685 t = L2TP(netdev);
686
687 assert(t);
688
689 if (!IN_SET(t->family, AF_INET, AF_INET6))
690 return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
691 "%s: L2TP tunnel with invalid address family configured. Ignoring",
692 filename);
693
d053d08a 694 if (in_addr_is_null(t->family, &t->remote))
3a56e697 695 return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
d053d08a 696 "%s: L2TP tunnel without a remote address configured. Ignoring",
3a56e697
SS		 697 filename);
698
699 if (t->tunnel_id == 0 || t->peer_tunnel_id == 0)
700 return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
701 "%s: L2TP tunnel without tunnel IDs configured. Ignoring",
702 filename);
703
704 ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section, i)
705 if (l2tp_session_verify(session) < 0)
706 l2tp_session_free(session);
707
708 return 0;
709}
710
711static void l2tp_tunnel_done(NetDev *netdev) {
712 L2tpTunnel *t;
713
714 assert(netdev);
715
716 t = L2TP(netdev);
717
718 assert(t);
719
720 ordered_hashmap_free_with_destructor(t->sessions_by_section, l2tp_session_free);
721}
722
723const NetDevVTable l2tptnl_vtable = {
724 .object_size = sizeof(L2tpTunnel),
725 .init = l2tp_tunnel_init,
130b812f 726 .sections = NETDEV_COMMON_SECTIONS "L2TP\0L2TPSession\0",
3a27af62 727 .create_after_configured = l2tp_create_tunnel,
3a56e697
SS		 728 .done = l2tp_tunnel_done,
729 .create_type = NETDEV_CREATE_AFTER_CONFIGURED,
730 .config_verify = netdev_l2tp_tunnel_verify,
731};
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