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94f262c1ea91069593954a9de4dced88e16a2fcd
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/in.h>
32 #include <netinet/ether.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #include "ethtool-modes.h"
52
53 #ifndef RTN_FAILED_POLICY
54 #define RTN_FAILED_POLICY 12
55 #endif
56
57 #ifndef IFA_F_NOPREFIXROUTE
58 #define IFA_F_NOPREFIXROUTE 0x200
59 #endif
60
61 #ifndef IFA_FLAGS
62 #define IFA_FLAGS (IFA_MULTICAST + 1)
63 #endif
64
65 #include <string.h>
66 #include <fcntl.h>
67 #include <glob.h>
68 #include <time.h>
69 #include <unistd.h>
70
71 #include <netlink/msg.h>
72 #include <netlink/attr.h>
73 #include <netlink/socket.h>
74 #include <libubox/uloop.h>
75
76 #include "netifd.h"
77 #include "device.h"
78 #include "system.h"
79 #include "utils.h"
80
81 struct event_socket {
82 struct uloop_fd uloop;
83 struct nl_sock *sock;
84 int bufsize;
85 };
86
87 static int sock_ioctl = -1;
88 static struct nl_sock *sock_rtnl = NULL;
89
90 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
91 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
92 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
93 const unsigned int link, struct blob_attr **tb);
94
95 static char dev_buf[256];
96 static const char *proc_path = "/proc";
97 static const char *sysfs_path = "/sys";
98
99 struct netdev_type {
100 unsigned short id;
101 const char *name;
102 };
103
104 static const struct netdev_type netdev_types[] = {
105 {ARPHRD_NETROM, "netrom"},
106 {ARPHRD_ETHER, "ethernet"},
107 {ARPHRD_EETHER, "eethernet"},
108 {ARPHRD_AX25, "ax25"},
109 {ARPHRD_PRONET, "pronet"},
110 {ARPHRD_CHAOS, "chaos"},
111 {ARPHRD_IEEE802, "ieee802"},
112 {ARPHRD_ARCNET, "arcnet"},
113 {ARPHRD_APPLETLK, "appletlk"},
114 {ARPHRD_DLCI, "dlci"},
115 {ARPHRD_ATM, "atm"},
116 {ARPHRD_METRICOM, "metricom"},
117 {ARPHRD_IEEE1394, "ieee1394"},
118 {ARPHRD_EUI64, "eui64"},
119 {ARPHRD_INFINIBAND, "infiniband"},
120 {ARPHRD_SLIP, "slip"},
121 {ARPHRD_CSLIP, "cslip"},
122 {ARPHRD_SLIP6, "slip6"},
123 {ARPHRD_CSLIP6, "cslip6"},
124 {ARPHRD_RSRVD, "rsrvd"},
125 {ARPHRD_ADAPT, "adapt"},
126 {ARPHRD_ROSE, "rose"},
127 {ARPHRD_X25, "x25"},
128 {ARPHRD_HWX25, "hwx25"},
129 {ARPHRD_PPP, "ppp"},
130 {ARPHRD_CISCO, "cisco"},
131 {ARPHRD_LAPB, "lapb"},
132 {ARPHRD_DDCMP, "ddcmp"},
133 {ARPHRD_RAWHDLC, "rawhdlc"},
134 {ARPHRD_TUNNEL, "tunnel"},
135 {ARPHRD_TUNNEL6, "tunnel6"},
136 {ARPHRD_FRAD, "frad"},
137 {ARPHRD_SKIP, "skip"},
138 {ARPHRD_LOOPBACK, "loopback"},
139 {ARPHRD_LOCALTLK, "localtlk"},
140 {ARPHRD_FDDI, "fddi"},
141 {ARPHRD_BIF, "bif"},
142 {ARPHRD_SIT, "sit"},
143 {ARPHRD_IPDDP, "ipddp"},
144 {ARPHRD_IPGRE, "ipgre"},
145 {ARPHRD_PIMREG,"pimreg"},
146 {ARPHRD_HIPPI, "hippi"},
147 {ARPHRD_ASH, "ash"},
148 {ARPHRD_ECONET, "econet"},
149 {ARPHRD_IRDA, "irda"},
150 {ARPHRD_FCPP, "fcpp"},
151 {ARPHRD_FCAL, "fcal"},
152 {ARPHRD_FCPL, "fcpl"},
153 {ARPHRD_FCFABRIC, "fcfabric"},
154 {ARPHRD_IEEE80211, "ieee80211"},
155 {ARPHRD_IEEE80211_PRISM, "ie80211-prism"},
156 {ARPHRD_IEEE80211_RADIOTAP, "ieee80211-radiotap"},
157 #ifdef ARPHRD_PHONET
158 {ARPHRD_PHONET, "phonet"},
159 #endif
160 #ifdef ARPHRD_PHONET_PIPE
161 {ARPHRD_PHONET_PIPE, "phonet-pipe"},
162 #endif
163 {ARPHRD_IEEE802154, "ieee802154"},
164 {ARPHRD_VOID, "void"},
165 {ARPHRD_NONE, "none"}
166 };
167
168 static void
169 handler_nl_event(struct uloop_fd *u, unsigned int events)
170 {
171 struct event_socket *ev = container_of(u, struct event_socket, uloop);
172 int err;
173 socklen_t errlen = sizeof(err);
174
175 if (!u->error) {
176 nl_recvmsgs_default(ev->sock);
177 return;
178 }
179
180 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
181 goto abort;
182
183 switch(err) {
184 case ENOBUFS:
185 /* Increase rx buffer size on netlink socket */
186 ev->bufsize *= 2;
187 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
188 goto abort;
189
190 /* Request full dump since some info got dropped */
191 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
192 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
193 break;
194
195 default:
196 goto abort;
197 }
198 u->error = false;
199 return;
200
201 abort:
202 uloop_fd_delete(&ev->uloop);
203 return;
204 }
205
206 static struct nl_sock *
207 create_socket(int protocol, int groups)
208 {
209 struct nl_sock *sock;
210
211 sock = nl_socket_alloc();
212 if (!sock)
213 return NULL;
214
215 if (groups)
216 nl_join_groups(sock, groups);
217
218 if (nl_connect(sock, protocol)) {
219 nl_socket_free(sock);
220 return NULL;
221 }
222
223 return sock;
224 }
225
226 static bool
227 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
228 uloop_fd_handler cb, int flags)
229 {
230 ev->sock = create_socket(protocol, groups);
231 if (!ev->sock)
232 return false;
233
234 ev->uloop.fd = nl_socket_get_fd(ev->sock);
235 ev->uloop.cb = cb;
236 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
237 return false;
238
239 return true;
240 }
241
242 static bool
243 create_event_socket(struct event_socket *ev, int protocol,
244 int (*cb)(struct nl_msg *msg, void *arg))
245 {
246 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
247 return false;
248
249 /* Install the valid custom callback handler */
250 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
251
252 /* Disable sequence number checking on event sockets */
253 nl_socket_disable_seq_check(ev->sock);
254
255 /* Increase rx buffer size to 65K on event sockets */
256 ev->bufsize = 65535;
257 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
258 return false;
259
260 return true;
261 }
262
263 static bool
264 create_hotplug_event_socket(struct event_socket *ev, int protocol,
265 void (*cb)(struct uloop_fd *u, unsigned int events))
266 {
267 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
268 return false;
269
270 /* Increase rx buffer size to 65K on event sockets */
271 ev->bufsize = 65535;
272 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
273 return false;
274
275 return true;
276 }
277
278 static bool
279 system_rtn_aton(const char *src, unsigned int *dst)
280 {
281 char *e;
282 unsigned int n;
283
284 if (!strcmp(src, "local"))
285 n = RTN_LOCAL;
286 else if (!strcmp(src, "nat"))
287 n = RTN_NAT;
288 else if (!strcmp(src, "broadcast"))
289 n = RTN_BROADCAST;
290 else if (!strcmp(src, "anycast"))
291 n = RTN_ANYCAST;
292 else if (!strcmp(src, "multicast"))
293 n = RTN_MULTICAST;
294 else if (!strcmp(src, "prohibit"))
295 n = RTN_PROHIBIT;
296 else if (!strcmp(src, "unreachable"))
297 n = RTN_UNREACHABLE;
298 else if (!strcmp(src, "blackhole"))
299 n = RTN_BLACKHOLE;
300 else if (!strcmp(src, "xresolve"))
301 n = RTN_XRESOLVE;
302 else if (!strcmp(src, "unicast"))
303 n = RTN_UNICAST;
304 else if (!strcmp(src, "throw"))
305 n = RTN_THROW;
306 else if (!strcmp(src, "failed_policy"))
307 n = RTN_FAILED_POLICY;
308 else {
309 n = strtoul(src, &e, 0);
310 if (!e || *e || e == src || n > 255)
311 return false;
312 }
313
314 *dst = n;
315 return true;
316 }
317
318 static bool
319 system_tos_aton(const char *src, unsigned *dst)
320 {
321 char *e;
322
323 *dst = strtoul(src, &e, 16);
324 if (e == src || *e || *dst > 255)
325 return false;
326
327 return true;
328 }
329
330 int system_init(void)
331 {
332 static struct event_socket rtnl_event;
333 static struct event_socket hotplug_event;
334
335 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
336 system_fd_set_cloexec(sock_ioctl);
337
338 /* Prepare socket for routing / address control */
339 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
340 if (!sock_rtnl)
341 return -1;
342
343 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
344 return -1;
345
346 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
347 handle_hotplug_event))
348 return -1;
349
350 /* Receive network link events form kernel */
351 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
352
353 return 0;
354 }
355
356 static void write_file(const char *path, const char *val)
357 {
358 int fd;
359
360 fd = open(path, O_WRONLY);
361 if (fd < 0)
362 return;
363
364 if (write(fd, val, strlen(val))) {}
365 close(fd);
366 }
367
368 static int read_file(const char *path, char *buf, const size_t buf_sz)
369 {
370 int fd = -1, ret = -1;
371
372 fd = open(path, O_RDONLY);
373 if (fd < 0)
374 goto out;
375
376 ssize_t len = read(fd, buf, buf_sz - 1);
377 if (len < 0)
378 goto out;
379
380 ret = buf[len] = 0;
381
382 out:
383 if (fd >= 0)
384 close(fd);
385
386 return ret;
387 }
388
389
390 static const char *
391 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
392 {
393 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
394
395 return dev_buf;
396 }
397
398 static const char *
399 dev_sysfs_path(const char *ifname, const char *file)
400 {
401 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
402
403 return dev_buf;
404 }
405
406 static void
407 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
408 const char *val)
409 {
410 write_file(dev_sysctl_path(prefix, ifname, file), val);
411 }
412
413 static int
414 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
415 char *buf, size_t buf_sz)
416 {
417 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
418 }
419
420 static void
421 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
422 {
423 if (!val)
424 return;
425
426 write_file(dev_sysfs_path(ifname, file), val);
427 }
428
429 static void
430 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
431 {
432 char buf[16];
433
434 snprintf(buf, sizeof(buf), "%d", val);
435 system_set_dev_sysfs(file, ifname, buf);
436 }
437
438 static int
439 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
440 {
441 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
442 }
443
444 static void system_set_disable_ipv6(struct device *dev, const char *val)
445 {
446 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
447 }
448
449 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
450 {
451 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
452 }
453
454 static void system_set_rpfilter(struct device *dev, const char *val)
455 {
456 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
457 }
458
459 static void system_set_acceptlocal(struct device *dev, const char *val)
460 {
461 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
462 }
463
464 static void system_set_igmpversion(struct device *dev, const char *val)
465 {
466 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
467 }
468
469 static void system_set_mldversion(struct device *dev, const char *val)
470 {
471 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
472 }
473
474 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
475 {
476 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
477 }
478
479 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
480 {
481 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
482 }
483
484 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
485 {
486 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
487 }
488
489 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
490 {
491 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
492 }
493
494 static void system_set_neigh4locktime(struct device *dev, const char *val)
495 {
496 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
497 }
498
499 static void system_set_dadtransmits(struct device *dev, const char *val)
500 {
501 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
502 }
503
504 static void system_set_sendredirects(struct device *dev, const char *val)
505 {
506 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
507 }
508
509 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
510 {
511 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
512 }
513
514 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
515 {
516 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
517 }
518
519 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
520 {
521 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
522 }
523
524 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
525 {
526 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
527 }
528
529 static void system_set_arp_accept(struct device *dev, const char *val)
530 {
531 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
532 }
533
534 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
535 {
536 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
537 }
538
539 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
540 {
541 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
542 }
543
544 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
545 {
546 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
547 }
548
549 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
550 {
551 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
552 }
553
554 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
555 {
556 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
557 }
558
559 static void system_bridge_set_isolated(struct device *dev, const char *val)
560 {
561 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
562 }
563
564 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
565 {
566 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
567 }
568
569 void system_bridge_set_stp_state(struct device *dev, bool val)
570 {
571 const char *valstr = val ? "1" : "0";
572
573 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
574 }
575
576 static void system_bridge_set_learning(struct device *dev, const char *val)
577 {
578 system_set_dev_sysfs("brport/learning", dev->ifname, val);
579 }
580
581 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
582 {
583 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
584 }
585
586 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
587 {
588 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
589 dev->ifname, buf, buf_sz);
590 }
591
592 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
593 {
594 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
595 dev->ifname, buf, buf_sz);
596 }
597
598 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
599 {
600 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
601 dev->ifname, buf, buf_sz);
602 }
603
604 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
605 {
606 return system_get_dev_sysctl("ipv4/conf", "accept_local",
607 dev->ifname, buf, buf_sz);
608 }
609
610 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
611 {
612 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
613 dev->ifname, buf, buf_sz);
614 }
615
616 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
617 {
618 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
619 dev->ifname, buf, buf_sz);
620 }
621
622 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
623 {
624 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
625 dev->ifname, buf, buf_sz);
626 }
627
628 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
629 {
630 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
631 dev->ifname, buf, buf_sz);
632 }
633
634 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
635 {
636 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
637 dev->ifname, buf, buf_sz);
638 }
639
640 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
641 {
642 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
643 dev->ifname, buf, buf_sz);
644 }
645
646 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
647 {
648 return system_get_dev_sysctl("ipv4/neigh", "locktime",
649 dev->ifname, buf, buf_sz);
650 }
651
652 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
653 {
654 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
655 dev->ifname, buf, buf_sz);
656 }
657
658 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
659 {
660 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
661 dev->ifname, buf, buf_sz);
662 }
663
664
665 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
666 {
667 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
668 dev->ifname, buf, buf_sz);
669 }
670
671 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
672 {
673 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
674 dev->ifname, buf, buf_sz);
675 }
676
677 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
678 {
679 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
680 dev->ifname, buf, buf_sz);
681 }
682
683 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
684 {
685 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
686 dev->ifname, buf, buf_sz);
687 }
688
689 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
690 {
691 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
692 dev->ifname, buf, buf_sz);
693 }
694
695 #ifndef IFF_LOWER_UP
696 #define IFF_LOWER_UP 0x10000
697 #endif
698
699 static void
700 system_device_update_state(struct device *dev, unsigned int flags, unsigned int ifindex)
701 {
702 if (dev->type == &simple_device_type) {
703 bool present = ifindex > 0;
704
705 if (dev->external)
706 present = present && (flags & IFF_UP);
707
708 device_set_present(dev, present);
709 }
710 device_set_link(dev, flags & IFF_LOWER_UP ? true : false);
711 }
712
713 /* Evaluate netlink messages */
714 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
715 {
716 struct nlmsghdr *nh = nlmsg_hdr(msg);
717 struct ifinfomsg *ifi = NLMSG_DATA(nh);
718 struct nlattr *nla[__IFLA_MAX];
719 struct device *dev;
720
721 if (nh->nlmsg_type != RTM_NEWLINK)
722 return 0;
723
724 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
725 if (!nla[IFLA_IFNAME])
726 return 0;
727
728 dev = device_find(nla_data(nla[IFLA_IFNAME]));
729 if (!dev)
730 return 0;
731
732 system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index);
733 return 0;
734 }
735
736 static void
737 handle_hotplug_msg(char *data, int size)
738 {
739 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
740 char *cur, *end, *sep;
741 int skip;
742 bool add;
743
744 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
745 add = true;
746 else if (!strncmp(data, "remove@", 7))
747 add = false;
748 else
749 return;
750
751 skip = strlen(data) + 1;
752 end = data + size;
753
754 for (cur = data + skip; cur < end; cur += skip) {
755 skip = strlen(cur) + 1;
756
757 sep = strchr(cur, '=');
758 if (!sep)
759 continue;
760
761 *sep = 0;
762 if (!strcmp(cur, "INTERFACE"))
763 interface = sep + 1;
764 else if (!strcmp(cur, "SUBSYSTEM")) {
765 subsystem = sep + 1;
766 if (strcmp(subsystem, "net") != 0)
767 return;
768 } else if (!strcmp(cur, "DEVPATH_OLD")) {
769 interface_old = strrchr(sep + 1, '/');
770 if (interface_old)
771 interface_old++;
772 }
773 }
774
775 if (!subsystem || !interface)
776 return;
777
778 if (interface_old)
779 device_hotplug_event(interface_old, false);
780
781 device_hotplug_event(interface, add);
782 }
783
784 static void
785 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
786 {
787 struct event_socket *ev = container_of(u, struct event_socket, uloop);
788 struct sockaddr_nl nla;
789 unsigned char *buf = NULL;
790 int size;
791 int err;
792 socklen_t errlen = sizeof(err);
793
794 if (!u->error) {
795 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
796 if (nla.nl_pid == 0)
797 handle_hotplug_msg((char *) buf, size);
798
799 free(buf);
800 }
801 return;
802 }
803
804 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
805 goto abort;
806
807 switch(err) {
808 case ENOBUFS:
809 /* Increase rx buffer size on netlink socket */
810 ev->bufsize *= 2;
811 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
812 goto abort;
813 break;
814
815 default:
816 goto abort;
817 }
818 u->error = false;
819 return;
820
821 abort:
822 uloop_fd_delete(&ev->uloop);
823 return;
824 }
825
826 static int system_rtnl_call(struct nl_msg *msg)
827 {
828 int ret;
829
830 ret = nl_send_auto_complete(sock_rtnl, msg);
831 nlmsg_free(msg);
832
833 if (ret < 0)
834 return ret;
835
836 return nl_wait_for_ack(sock_rtnl);
837 }
838
839 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
840 {
841 struct nl_msg *msg;
842 struct ifinfomsg iim = {
843 .ifi_family = af,
844 .ifi_index = index,
845 };
846
847 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
848 if (!msg)
849 return NULL;
850
851 nlmsg_append(msg, &iim, sizeof(iim), 0);
852 if (ifname)
853 nla_put_string(msg, IFLA_IFNAME, ifname);
854
855 return msg;
856 }
857
858 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
859 {
860 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
861 }
862
863 static int system_link_del(const char *ifname)
864 {
865 struct nl_msg *msg;
866
867 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
868 if (!msg)
869 return -1;
870
871 return system_rtnl_call(msg);
872 }
873
874 int system_bridge_delbr(struct device *bridge)
875 {
876 return system_link_del(bridge->ifname);
877 }
878
879 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
880 {
881 struct ifreq ifr;
882
883 memset(&ifr, 0, sizeof(ifr));
884 if (dev)
885 ifr.ifr_ifindex = dev->ifindex;
886 else
887 ifr.ifr_data = data;
888 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
889 return ioctl(sock_ioctl, cmd, &ifr);
890 }
891
892 static bool system_is_bridge(const char *name)
893 {
894 struct stat st;
895
896 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
897 }
898
899 static char *system_get_bridge(const char *name, char *buf, int buflen)
900 {
901 char *path;
902 ssize_t len = -1;
903 glob_t gl;
904
905 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
906 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
907 return NULL;
908
909 if (gl.gl_pathc > 0)
910 len = readlink(gl.gl_pathv[0], buf, buflen);
911
912 globfree(&gl);
913
914 if (len < 0)
915 return NULL;
916
917 buf[len] = 0;
918 path = strrchr(buf, '/');
919 if (!path)
920 return NULL;
921
922 return path + 1;
923 }
924
925 static void
926 system_bridge_set_wireless(struct device *bridge, struct device *dev)
927 {
928 bool mcast_to_ucast = dev->wireless_ap;
929 bool hairpin;
930
931 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
932 mcast_to_ucast = dev->settings.multicast_to_unicast;
933 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
934 !bridge->settings.multicast_to_unicast)
935 mcast_to_ucast = false;
936
937 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
938 if (dev->wireless_isolate)
939 hairpin = false;
940
941 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
942 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
943 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
944 }
945
946 int system_bridge_addif(struct device *bridge, struct device *dev)
947 {
948 char buf[64];
949 char *oldbr;
950 int tries = 0;
951 int ret;
952
953 retry:
954 ret = 0;
955 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
956 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
957 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
958 tries++;
959 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
960 dev->ifname, bridge->ifname, tries, strerror(errno));
961 if (tries <= 3)
962 goto retry;
963 }
964
965 if (dev->wireless)
966 system_bridge_set_wireless(bridge, dev);
967
968 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
969 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
970 system_bridge_set_multicast_router(dev, buf);
971 }
972
973 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
974 dev->settings.multicast_fast_leave)
975 system_bridge_set_multicast_fast_leave(dev, "1");
976
977 if (dev->settings.flags & DEV_OPT_LEARNING &&
978 !dev->settings.learning)
979 system_bridge_set_learning(dev, "0");
980
981 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
982 !dev->settings.unicast_flood)
983 system_bridge_set_unicast_flood(dev, "0");
984
985 if (dev->settings.flags & DEV_OPT_ISOLATE &&
986 dev->settings.isolate)
987 system_bridge_set_isolated(dev, "1");
988
989 if (dev->bpdu_filter)
990 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
991
992 return ret;
993 }
994
995 int system_bridge_delif(struct device *bridge, struct device *dev)
996 {
997 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
998 }
999
1000 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
1001 {
1002 struct bridge_vlan_info vinfo = { .vid = vid, };
1003 unsigned short flags = 0;
1004 struct nlattr *afspec;
1005 struct nl_msg *nlm;
1006 int index;
1007 int ret = 0;
1008
1009 index = if_nametoindex(iface);
1010 if (!index)
1011 return -1;
1012
1013 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1014 if (!nlm)
1015 return -1;
1016
1017 if (vflags & BRVLAN_F_SELF)
1018 flags |= BRIDGE_FLAGS_SELF;
1019
1020 if (vflags & BRVLAN_F_PVID)
1021 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1022
1023 if (vflags & BRVLAN_F_UNTAGGED)
1024 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1025
1026 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1027 if (!afspec) {
1028 ret = -ENOMEM;
1029 goto failure;
1030 }
1031
1032 if (flags)
1033 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1034
1035 if (vid_end > vid)
1036 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1037
1038 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1039
1040 if (vid_end > vid) {
1041 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1042 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1043 vinfo.vid = vid_end;
1044 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1045 }
1046
1047 nla_nest_end(nlm, afspec);
1048
1049 return system_rtnl_call(nlm);
1050
1051 failure:
1052 nlmsg_free(nlm);
1053 return ret;
1054 }
1055
1056 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1057 {
1058 const char *ifname = dev->ifname;
1059 struct blob_attr *cur;
1060 char op = cfg ? '+' : '-';
1061 char buf[64];
1062 size_t rem;
1063
1064 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1065 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1066 write_file(dev_buf, buf);
1067
1068 if (!cfg)
1069 return 0;
1070
1071 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1072
1073 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1074
1075 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1076 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1077 cfg->policy == BONDING_MODE_8023AD)
1078 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1079
1080 if (cfg->policy == BONDING_MODE_8023AD) {
1081 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1082 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1083 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1084 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1085 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1086 }
1087
1088 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1089 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1090
1091 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1092 cfg->policy == BONDING_MODE_BALANCE_ALB)
1093 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1094
1095 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1096 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1097 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1098 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1099 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1100 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1101
1102 system_set_dev_sysfs_int((cfg->monitor_arp ?
1103 "bonding/arp_interval" :
1104 "bonding/miimon"), ifname, cfg->monitor_interval);
1105
1106 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1107 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1108 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1109 }
1110
1111 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1112 if (cfg->policy < BONDING_MODE_8023AD)
1113 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1114 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1115 if (!cfg->monitor_arp && cfg->monitor_interval) {
1116 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1117 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1118 }
1119
1120 return 0;
1121 }
1122
1123 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1124 {
1125 const char *port_name = port->ifname;
1126 const char op_ch = add ? '+' : '-';
1127 char buf[IFNAMSIZ + 1];
1128
1129 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1130 system_if_down(port);
1131 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1132 system_if_up(port);
1133
1134 if (primary)
1135 system_set_dev_sysfs("bonding/primary", dev->ifname,
1136 add ? port_name : "");
1137
1138 return 0;
1139 }
1140
1141 int system_if_resolve(struct device *dev)
1142 {
1143 struct ifreq ifr;
1144
1145 memset(&ifr, 0, sizeof(ifr));
1146 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1147 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1148 return ifr.ifr_ifindex;
1149 else
1150 return 0;
1151 }
1152
1153 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1154 {
1155 struct ifreq ifr;
1156
1157 memset(&ifr, 0, sizeof(ifr));
1158 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1159 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1160 return -1;
1161
1162 ifr.ifr_flags |= add;
1163 ifr.ifr_flags &= ~rem;
1164 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1165 }
1166
1167 struct clear_data {
1168 struct nl_msg *msg;
1169 struct device *dev;
1170 int type;
1171 int size;
1172 int af;
1173 };
1174
1175
1176 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1177 {
1178 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1179
1180 return (long)ifa->ifa_index == ifindex;
1181 }
1182
1183 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1184 {
1185 struct rtmsg *r = NLMSG_DATA(hdr);
1186 struct nlattr *tb[__RTA_MAX];
1187
1188 if (r->rtm_protocol == RTPROT_KERNEL &&
1189 r->rtm_family == AF_INET6)
1190 return false;
1191
1192 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1193 if (!tb[RTA_OIF])
1194 return false;
1195
1196 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1197 }
1198
1199 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1200 {
1201 return true;
1202 }
1203
1204 static int cb_clear_event(struct nl_msg *msg, void *arg)
1205 {
1206 struct clear_data *clr = arg;
1207 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1208 bool (*cb)(struct nlmsghdr *, int ifindex);
1209 int type, ret;
1210
1211 switch(clr->type) {
1212 case RTM_GETADDR:
1213 type = RTM_DELADDR;
1214 if (hdr->nlmsg_type != RTM_NEWADDR)
1215 return NL_SKIP;
1216
1217 cb = check_ifaddr;
1218 break;
1219 case RTM_GETROUTE:
1220 type = RTM_DELROUTE;
1221 if (hdr->nlmsg_type != RTM_NEWROUTE)
1222 return NL_SKIP;
1223
1224 cb = check_route;
1225 break;
1226 case RTM_GETRULE:
1227 type = RTM_DELRULE;
1228 if (hdr->nlmsg_type != RTM_NEWRULE)
1229 return NL_SKIP;
1230
1231 cb = check_rule;
1232 break;
1233 default:
1234 return NL_SKIP;
1235 }
1236
1237 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1238 return NL_SKIP;
1239
1240 if (type == RTM_DELRULE)
1241 D(SYSTEM, "Remove a rule\n");
1242 else
1243 D(SYSTEM, "Remove %s from device %s\n",
1244 type == RTM_DELADDR ? "an address" : "a route",
1245 clr->dev->ifname);
1246
1247 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1248 hdr = nlmsg_hdr(clr->msg);
1249 hdr->nlmsg_type = type;
1250 hdr->nlmsg_flags = NLM_F_REQUEST;
1251
1252 nl_socket_disable_auto_ack(sock_rtnl);
1253 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1254 if (ret < 0) {
1255 if (type == RTM_DELRULE)
1256 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1257 else
1258 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1259 type == RTM_DELADDR ? "an address" : "a route",
1260 clr->dev->ifname, ret);
1261 }
1262
1263 nl_socket_enable_auto_ack(sock_rtnl);
1264
1265 return NL_SKIP;
1266 }
1267
1268 static int
1269 cb_finish_event(struct nl_msg *msg, void *arg)
1270 {
1271 int *pending = arg;
1272 *pending = 0;
1273 return NL_STOP;
1274 }
1275
1276 static int
1277 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1278 {
1279 int *pending = arg;
1280 *pending = err->error;
1281 return NL_STOP;
1282 }
1283
1284 static void
1285 system_if_clear_entries(struct device *dev, int type, int af)
1286 {
1287 struct clear_data clr;
1288 struct nl_cb *cb;
1289 struct rtmsg rtm = {
1290 .rtm_family = af,
1291 .rtm_flags = RTM_F_CLONED,
1292 };
1293 int flags = NLM_F_DUMP;
1294 int pending = 1;
1295
1296 clr.af = af;
1297 clr.dev = dev;
1298 clr.type = type;
1299 switch (type) {
1300 case RTM_GETADDR:
1301 case RTM_GETRULE:
1302 clr.size = sizeof(struct rtgenmsg);
1303 break;
1304 case RTM_GETROUTE:
1305 clr.size = sizeof(struct rtmsg);
1306 break;
1307 default:
1308 return;
1309 }
1310
1311 cb = nl_cb_alloc(NL_CB_DEFAULT);
1312 if (!cb)
1313 return;
1314
1315 clr.msg = nlmsg_alloc_simple(type, flags);
1316 if (!clr.msg)
1317 goto out;
1318
1319 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1320 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1321 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1322 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1323
1324 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1325 goto free;
1326
1327 while (pending > 0)
1328 nl_recvmsgs(sock_rtnl, cb);
1329
1330 free:
1331 nlmsg_free(clr.msg);
1332 out:
1333 nl_cb_put(cb);
1334 }
1335
1336 /*
1337 * Clear bridge (membership) state and bring down device
1338 */
1339 void system_if_clear_state(struct device *dev)
1340 {
1341 static char buf[256];
1342 char *bridge;
1343 device_set_ifindex(dev, system_if_resolve(dev));
1344
1345 if (dev->external || !dev->ifindex)
1346 return;
1347
1348 system_if_flags(dev->ifname, 0, IFF_UP);
1349
1350 if (system_is_bridge(dev->ifname)) {
1351 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1352 system_bridge_delbr(dev);
1353 return;
1354 }
1355
1356 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1357 if (bridge) {
1358 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1359 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1360 }
1361
1362 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1363 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1364 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1365 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1366 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1367 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1368 system_set_disable_ipv6(dev, "0");
1369 }
1370
1371 static inline unsigned long
1372 sec_to_jiffies(int val)
1373 {
1374 return (unsigned long) val * 100;
1375 }
1376
1377 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1378 {
1379 struct nlattr *linkinfo, *data;
1380 struct nl_msg *msg;
1381 uint64_t val;
1382 int rv;
1383
1384 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1385 if (!msg)
1386 return -1;
1387
1388 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1389 goto nla_put_failure;
1390
1391 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1392
1393 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1394 goto nla_put_failure;
1395
1396 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1397 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1398 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1399 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1400 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1401
1402 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1403 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1404
1405 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1406 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1407 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1408 }
1409
1410 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1411 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1412
1413 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1414 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1415
1416 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1417 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1418
1419 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1420 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1421 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1422 val = cfg->robustness * cfg->query_interval +
1423 cfg->query_response_interval;
1424
1425 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1426
1427 val -= cfg->query_response_interval / 2;
1428
1429 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1430 }
1431
1432 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1433 val = cfg->query_interval / 4;
1434
1435 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1436 }
1437
1438 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1439 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1440 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1441 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1442
1443 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1444 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1445
1446 nla_nest_end(msg, data);
1447 nla_nest_end(msg, linkinfo);
1448
1449 rv = system_rtnl_call(msg);
1450 if (rv)
1451 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1452
1453 return rv;
1454
1455 nla_put_failure:
1456 nlmsg_free(msg);
1457 return -ENOMEM;
1458 }
1459
1460 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1461 {
1462 struct nl_msg *msg;
1463 struct nlattr *linkinfo, *data;
1464 size_t i;
1465 int rv;
1466 static const struct {
1467 const char *name;
1468 enum macvlan_mode val;
1469 } modes[] = {
1470 { "private", MACVLAN_MODE_PRIVATE },
1471 { "vepa", MACVLAN_MODE_VEPA },
1472 { "bridge", MACVLAN_MODE_BRIDGE },
1473 { "passthru", MACVLAN_MODE_PASSTHRU },
1474 };
1475
1476 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1477 if (!msg)
1478 return -1;
1479
1480 if (cfg->flags & MACVLAN_OPT_MACADDR)
1481 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1482 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1483
1484 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1485 goto nla_put_failure;
1486
1487 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1488
1489 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1490 goto nla_put_failure;
1491
1492 if (cfg->mode) {
1493 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1494 if (strcmp(cfg->mode, modes[i].name) != 0)
1495 continue;
1496
1497 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1498 break;
1499 }
1500 }
1501
1502 nla_nest_end(msg, data);
1503 nla_nest_end(msg, linkinfo);
1504
1505 rv = system_rtnl_call(msg);
1506 if (rv)
1507 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1508
1509 return rv;
1510
1511 nla_put_failure:
1512 nlmsg_free(msg);
1513 return -ENOMEM;
1514 }
1515
1516 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1517 {
1518 struct nl_msg *msg;
1519 int index;
1520
1521 if (!dev)
1522 return -1;
1523
1524 index = system_if_resolve(dev);
1525 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1526 if (!msg)
1527 return -1;
1528
1529 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1530 return system_rtnl_call(msg);
1531 }
1532
1533 int system_macvlan_del(struct device *macvlan)
1534 {
1535 return system_link_del(macvlan->ifname);
1536 }
1537
1538 int system_netns_open(const pid_t target_ns)
1539 {
1540 char pid_net_path[PATH_MAX];
1541
1542 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1543
1544 return open(pid_net_path, O_RDONLY);
1545 }
1546
1547 int system_netns_set(int netns_fd)
1548 {
1549 return setns(netns_fd, CLONE_NEWNET);
1550 }
1551
1552 int system_veth_add(struct device *veth, struct veth_config *cfg)
1553 {
1554 struct nl_msg *msg;
1555 struct ifinfomsg empty_iim = {0,};
1556 struct nlattr *linkinfo, *data, *veth_info;
1557 int rv;
1558
1559 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1560
1561 if (!msg)
1562 return -1;
1563
1564 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1565
1566 if (cfg->flags & VETH_OPT_MACADDR)
1567 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1568 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1569
1570 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1571 goto nla_put_failure;
1572
1573 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1574
1575 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1576 goto nla_put_failure;
1577
1578 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1579 goto nla_put_failure;
1580
1581 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1582
1583 if (cfg->flags & VETH_OPT_PEER_NAME)
1584 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1585 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1586 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1587
1588 nla_nest_end(msg, veth_info);
1589 nla_nest_end(msg, data);
1590 nla_nest_end(msg, linkinfo);
1591
1592 rv = system_rtnl_call(msg);
1593 if (rv) {
1594 if (cfg->flags & VETH_OPT_PEER_NAME)
1595 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1596 else
1597 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1598 }
1599
1600 return rv;
1601
1602 nla_put_failure:
1603 nlmsg_free(msg);
1604 return -ENOMEM;
1605 }
1606
1607 int system_veth_del(struct device *veth)
1608 {
1609 return system_link_del(veth->ifname);
1610 }
1611
1612 static int system_vlan(struct device *dev, int id)
1613 {
1614 struct vlan_ioctl_args ifr = {
1615 .cmd = SET_VLAN_NAME_TYPE_CMD,
1616 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1617 };
1618
1619 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1620 return -1;
1621
1622 if (id < 0) {
1623 ifr.cmd = DEL_VLAN_CMD;
1624 ifr.u.VID = 0;
1625 } else {
1626 ifr.cmd = ADD_VLAN_CMD;
1627 ifr.u.VID = id;
1628 }
1629 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1630 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1631 }
1632
1633 int system_vlan_add(struct device *dev, int id)
1634 {
1635 return system_vlan(dev, id);
1636 }
1637
1638 int system_vlan_del(struct device *dev)
1639 {
1640 return system_vlan(dev, -1);
1641 }
1642
1643 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1644 {
1645 struct nl_msg *msg;
1646 struct nlattr *linkinfo, *data, *qos;
1647 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1648 struct vlan_qos_mapping *elem;
1649 struct ifla_vlan_qos_mapping nl_qos_map;
1650 int rv;
1651
1652 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1653
1654 if (!msg)
1655 return -1;
1656
1657 nlmsg_append(msg, &iim, sizeof(iim), 0);
1658 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1659 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1660
1661 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1662 goto nla_put_failure;
1663
1664 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1665
1666 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1667 goto nla_put_failure;
1668
1669 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1670
1671 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1672 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1673 #else
1674 if(cfg->proto == VLAN_PROTO_8021AD)
1675 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1676 #endif
1677
1678 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1679 goto nla_put_failure;
1680
1681 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1682 nl_qos_map.from = elem->from;
1683 nl_qos_map.to = elem->to;
1684 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1685 }
1686 nla_nest_end(msg, qos);
1687
1688 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1689 goto nla_put_failure;
1690
1691 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1692 nl_qos_map.from = elem->from;
1693 nl_qos_map.to = elem->to;
1694 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1695 }
1696 nla_nest_end(msg, qos);
1697
1698 nla_nest_end(msg, data);
1699 nla_nest_end(msg, linkinfo);
1700
1701 rv = system_rtnl_call(msg);
1702 if (rv)
1703 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1704
1705 return rv;
1706
1707 nla_put_failure:
1708 nlmsg_free(msg);
1709 return -ENOMEM;
1710 }
1711
1712 int system_vlandev_del(struct device *vlandev)
1713 {
1714 return system_link_del(vlandev->ifname);
1715 }
1716
1717 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1718 {
1719 if (nr < 0)
1720 return;
1721
1722 if (nr >= (nwords * 32))
1723 return;
1724
1725 mask[nr / 32] &= ~(1U << (nr % 32));
1726 }
1727
1728 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1729 {
1730 if (nr < 0)
1731 return false;
1732
1733 if (nr >= (nwords * 32))
1734 return false;
1735
1736 return !!(mask[nr / 32] & (1U << (nr % 32)));
1737 }
1738
1739 static int
1740 system_get_ethtool_gro(struct device *dev)
1741 {
1742 struct ethtool_value ecmd;
1743 struct ifreq ifr = {
1744 .ifr_data = (caddr_t)&ecmd,
1745 };
1746
1747 memset(&ecmd, 0, sizeof(ecmd));
1748 ecmd.cmd = ETHTOOL_GGRO;
1749 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1750
1751 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1752 return -1;
1753
1754 return ecmd.data;
1755 }
1756
1757 static void
1758 system_set_ethtool_gro(struct device *dev, struct device_settings *s)
1759 {
1760 struct ethtool_value ecmd;
1761 struct ifreq ifr = {
1762 .ifr_data = (caddr_t)&ecmd,
1763 };
1764
1765 memset(&ecmd, 0, sizeof(ecmd));
1766 ecmd.cmd = ETHTOOL_SGRO;
1767 ecmd.data = s->gro;
1768 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1769
1770 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1771 }
1772
1773 static void
1774 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1775 {
1776 struct ethtool_pauseparam pp;
1777 struct ifreq ifr = {
1778 .ifr_data = (caddr_t)&pp,
1779 };
1780
1781 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1782 memset(&pp, 0, sizeof(pp));
1783 pp.cmd = ETHTOOL_GPAUSEPARAM;
1784 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1785 return;
1786
1787 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1788 pp.autoneg = AUTONEG_DISABLE;
1789
1790 if (s->flags & DEV_OPT_PAUSE) {
1791 if (s->flags & DEV_OPT_RXPAUSE)
1792 pp.rx_pause = s->rxpause && s->pause;
1793 else
1794 pp.rx_pause = s->pause;
1795
1796 if (s->flags & DEV_OPT_TXPAUSE)
1797 pp.tx_pause = s->txpause && s->pause;
1798 else
1799 pp.tx_pause = s->pause;
1800 } else {
1801 if (s->flags & DEV_OPT_RXPAUSE)
1802 pp.rx_pause = s->rxpause;
1803
1804 if (s->flags & DEV_OPT_TXPAUSE)
1805 pp.tx_pause = s->txpause;
1806 }
1807
1808 if (s->flags & DEV_OPT_ASYM_PAUSE &&
1809 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
1810 pp.rx_pause = pp.tx_pause = false;
1811 } else {
1812 pp.autoneg = AUTONEG_ENABLE;
1813 /* Pause and Asym_Pause advertising bits will be set via
1814 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
1815 */
1816 }
1817
1818 pp.cmd = ETHTOOL_SPAUSEPARAM;
1819 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1820 }
1821
1822 static void
1823 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1824 {
1825 struct {
1826 struct ethtool_link_settings req;
1827 __u32 link_mode_data[3 * 127];
1828 } ecmd;
1829 struct ifreq ifr = {
1830 .ifr_data = (caddr_t)&ecmd,
1831 };
1832 size_t i;
1833 __s8 nwords;
1834 __u32 *supported, *advertising;
1835
1836 system_set_ethtool_pause(dev, s);
1837
1838 memset(&ecmd, 0, sizeof(ecmd));
1839 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
1840 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1841
1842 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
1843 ecmd.req.link_mode_masks_nwords >= 0 ||
1844 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
1845 return;
1846
1847 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
1848
1849 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
1850 ecmd.req.link_mode_masks_nwords <= 0 ||
1851 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
1852 return;
1853
1854 nwords = ecmd.req.link_mode_masks_nwords;
1855 supported = &ecmd.link_mode_data[0];
1856 advertising = &ecmd.link_mode_data[nwords];
1857 memcpy(advertising, supported, sizeof(__u32) * nwords);
1858
1859 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
1860 if (s->flags & DEV_OPT_DUPLEX) {
1861 if (s->duplex)
1862 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
1863 else
1864 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
1865 }
1866 if (!(s->flags & DEV_OPT_SPEED) ||
1867 s->speed == ethtool_modes[i].speed)
1868 continue;
1869
1870 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
1871 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
1872 }
1873
1874 if (s->flags & DEV_OPT_PAUSE)
1875 if (!s->pause)
1876 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
1877
1878 if (s->flags & DEV_OPT_ASYM_PAUSE)
1879 if (!s->asym_pause)
1880 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
1881
1882 if (s->flags & DEV_OPT_AUTONEG) {
1883 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1884 if (!s->autoneg) {
1885 if (s->flags & DEV_OPT_SPEED)
1886 ecmd.req.speed = s->speed;
1887
1888 if (s->flags & DEV_OPT_DUPLEX)
1889 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
1890 }
1891 }
1892
1893 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
1894 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1895 }
1896
1897 static void
1898 system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s)
1899 {
1900 if (s->flags & DEV_OPT_GRO)
1901 system_set_ethtool_gro(dev, s);
1902 }
1903
1904 void
1905 system_if_get_settings(struct device *dev, struct device_settings *s)
1906 {
1907 struct ifreq ifr;
1908 char buf[10];
1909 int ret;
1910
1911 memset(&ifr, 0, sizeof(ifr));
1912 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1913
1914 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1915 s->mtu = ifr.ifr_mtu;
1916 s->flags |= DEV_OPT_MTU;
1917 }
1918
1919 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1920 if (s->mtu6 > 0)
1921 s->flags |= DEV_OPT_MTU6;
1922
1923 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1924 s->txqueuelen = ifr.ifr_qlen;
1925 s->flags |= DEV_OPT_TXQUEUELEN;
1926 }
1927
1928 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1929 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1930 s->flags |= DEV_OPT_MACADDR;
1931 }
1932
1933 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1934 s->ipv6 = !strtoul(buf, NULL, 0);
1935 s->flags |= DEV_OPT_IPV6;
1936 }
1937
1938 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1939 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1940 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1941 }
1942
1943 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1944 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1945 s->flags |= DEV_OPT_PROMISC;
1946
1947 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1948 s->flags |= DEV_OPT_MULTICAST;
1949 }
1950
1951 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1952 s->rpfilter = strtoul(buf, NULL, 0);
1953 s->flags |= DEV_OPT_RPFILTER;
1954 }
1955
1956 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1957 s->acceptlocal = strtoul(buf, NULL, 0);
1958 s->flags |= DEV_OPT_ACCEPTLOCAL;
1959 }
1960
1961 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1962 s->igmpversion = strtoul(buf, NULL, 0);
1963 s->flags |= DEV_OPT_IGMPVERSION;
1964 }
1965
1966 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1967 s->mldversion = strtoul(buf, NULL, 0);
1968 s->flags |= DEV_OPT_MLDVERSION;
1969 }
1970
1971 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1972 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1973 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1974 }
1975
1976 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1977 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1978 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1979 }
1980
1981 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1982 s->neigh4locktime = strtol(buf, NULL, 0);
1983 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1984 }
1985
1986 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1987 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1988 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1989 }
1990
1991 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1992 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1993 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1994 }
1995
1996 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1997 s->dadtransmits = strtoul(buf, NULL, 0);
1998 s->flags |= DEV_OPT_DADTRANSMITS;
1999 }
2000
2001 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
2002 s->sendredirects = strtoul(buf, NULL, 0);
2003 s->flags |= DEV_OPT_SENDREDIRECTS;
2004 }
2005
2006 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2007 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2008 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
2009 }
2010
2011 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2012 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2013 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
2014 }
2015
2016 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
2017 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
2018 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
2019 }
2020
2021 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
2022 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
2023 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
2024 }
2025
2026 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
2027 s->arp_accept = strtoul(buf, NULL, 0);
2028 s->flags |= DEV_OPT_ARP_ACCEPT;
2029 }
2030
2031 ret = system_get_ethtool_gro(dev);
2032 if (ret >= 0) {
2033 s->gro = ret;
2034 s->flags |= DEV_OPT_GRO;
2035 }
2036 }
2037
2038 void
2039 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
2040 {
2041 struct ifreq ifr;
2042 char buf[12];
2043
2044 apply_mask &= s->flags;
2045
2046 memset(&ifr, 0, sizeof(ifr));
2047 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2048 if (apply_mask & DEV_OPT_MTU) {
2049 ifr.ifr_mtu = s->mtu;
2050 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2051 s->flags &= ~DEV_OPT_MTU;
2052 }
2053 if (apply_mask & DEV_OPT_MTU6) {
2054 system_update_ipv6_mtu(dev, s->mtu6);
2055 }
2056 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2057 ifr.ifr_qlen = s->txqueuelen;
2058 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2059 s->flags &= ~DEV_OPT_TXQUEUELEN;
2060 }
2061 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2062 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2063 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2064 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2065 s->flags &= ~DEV_OPT_MACADDR;
2066 }
2067 if (apply_mask & DEV_OPT_IPV6)
2068 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2069 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2070 struct device dummy = {
2071 .ifname = "all",
2072 };
2073 bool ip6segmentrouting = device_check_ip6segmentrouting();
2074
2075 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2076 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2077 }
2078 if (apply_mask & DEV_OPT_PROMISC) {
2079 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2080 !s->promisc ? IFF_PROMISC : 0) < 0)
2081 s->flags &= ~DEV_OPT_PROMISC;
2082 }
2083 if (apply_mask & DEV_OPT_RPFILTER) {
2084 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2085 system_set_rpfilter(dev, buf);
2086 }
2087 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2088 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2089 if (apply_mask & DEV_OPT_IGMPVERSION) {
2090 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2091 system_set_igmpversion(dev, buf);
2092 }
2093 if (apply_mask & DEV_OPT_MLDVERSION) {
2094 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2095 system_set_mldversion(dev, buf);
2096 }
2097 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2098 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2099 system_set_neigh4reachabletime(dev, buf);
2100 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2101 system_set_neigh6reachabletime(dev, buf);
2102 }
2103 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2104 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2105 system_set_neigh4locktime(dev, buf);
2106 }
2107 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2108 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2109 system_set_neigh4gcstaletime(dev, buf);
2110 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2111 system_set_neigh6gcstaletime(dev, buf);
2112 }
2113 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2114 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2115 system_set_dadtransmits(dev, buf);
2116 }
2117 if (apply_mask & DEV_OPT_MULTICAST) {
2118 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2119 !s->multicast ? IFF_MULTICAST : 0) < 0)
2120 s->flags &= ~DEV_OPT_MULTICAST;
2121 }
2122 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2123 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2124 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2125 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2126 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2127 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2128 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2129 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2130 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2131 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2132 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2133 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2134 system_set_ethtool_settings(dev, s);
2135 }
2136
2137 void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s)
2138 {
2139 system_set_ethtool_settings_after_up(dev, s);
2140 }
2141
2142 int system_if_up(struct device *dev)
2143 {
2144 return system_if_flags(dev->ifname, IFF_UP, 0);
2145 }
2146
2147 int system_if_down(struct device *dev)
2148 {
2149 return system_if_flags(dev->ifname, 0, IFF_UP);
2150 }
2151
2152 struct if_check_data {
2153 struct device *dev;
2154 int pending;
2155 int ret;
2156 };
2157
2158 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2159 {
2160 struct nlmsghdr *nh = nlmsg_hdr(msg);
2161 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2162 struct if_check_data *chk = (struct if_check_data *)arg;
2163
2164 if (nh->nlmsg_type != RTM_NEWLINK)
2165 return NL_SKIP;
2166
2167 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2168 return NL_OK;
2169 }
2170
2171 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2172 {
2173 struct if_check_data *chk = (struct if_check_data *)arg;
2174 chk->pending = 0;
2175 return NL_STOP;
2176 }
2177
2178 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2179 {
2180 struct if_check_data *chk = (struct if_check_data *)arg;
2181
2182 if (chk->dev->type == &simple_device_type)
2183 device_set_present(chk->dev, false);
2184 device_set_link(chk->dev, false);
2185 chk->pending = err->error;
2186
2187 return NL_STOP;
2188 }
2189
2190 struct bridge_vlan_check_data {
2191 struct device *check_dev;
2192 int ifindex;
2193 int ret;
2194 bool pending;
2195 };
2196
2197 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2198 struct bridge_vlan_port *port,
2199 struct bridge_vlan_info *vinfo)
2200 {
2201 uint16_t flags = 0, diff, mask;
2202
2203 if (port->flags & BRVLAN_F_PVID)
2204 flags |= BRIDGE_VLAN_INFO_PVID;
2205 if (port->flags & BRVLAN_F_UNTAGGED)
2206 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2207
2208 diff = vinfo->flags ^ flags;
2209 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2210 if (diff & mask) {
2211 data->ret = 1;
2212 data->pending = false;
2213 }
2214
2215 port->check = 1;
2216 }
2217
2218 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2219 struct rtattr *attr)
2220 {
2221 struct bridge_vlan_hotplug_port *port;
2222 struct bridge_vlan_info *vinfo;
2223 struct bridge_vlan *vlan;
2224 struct rtattr *cur;
2225 int rem = RTA_PAYLOAD(attr);
2226 int i;
2227
2228 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2229 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2230 continue;
2231
2232 vinfo = RTA_DATA(cur);
2233 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2234 if (!vlan) {
2235 data->ret = 1;
2236 data->pending = false;
2237 return;
2238 }
2239
2240 for (i = 0; i < vlan->n_ports; i++)
2241 if (!vlan->ports[i].check)
2242 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2243
2244 list_for_each_entry(port, &vlan->hotplug_ports, list)
2245 if (!port->port.check)
2246 bridge_vlan_check_port(data, &port->port, vinfo);
2247 }
2248 }
2249
2250 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2251 {
2252 struct bridge_vlan_check_data *data = arg;
2253 struct nlmsghdr *nh = nlmsg_hdr(msg);
2254 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2255 struct rtattr *attr;
2256 int rem;
2257
2258 if (nh->nlmsg_type != RTM_NEWLINK)
2259 return NL_SKIP;
2260
2261 if (ifi->ifi_family != AF_BRIDGE)
2262 return NL_SKIP;
2263
2264 if (ifi->ifi_index != data->ifindex)
2265 return NL_SKIP;
2266
2267 attr = IFLA_RTA(ifi);
2268 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2269 while (RTA_OK(attr, rem)) {
2270 if (attr->rta_type == IFLA_AF_SPEC)
2271 bridge_vlan_check_attr(data, attr);
2272
2273 attr = RTA_NEXT(attr, rem);
2274 }
2275
2276 return NL_SKIP;
2277 }
2278
2279 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2280 {
2281 struct bridge_vlan_check_data *data = arg;
2282 data->pending = false;
2283 return NL_STOP;
2284 }
2285
2286 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2287 {
2288 struct bridge_vlan_check_data *data = arg;
2289 data->pending = false;
2290 return NL_STOP;
2291 }
2292
2293 int system_bridge_vlan_check(struct device *dev, char *ifname)
2294 {
2295 struct bridge_vlan_check_data data = {
2296 .check_dev = dev,
2297 .ifindex = if_nametoindex(ifname),
2298 .ret = -1,
2299 .pending = true,
2300 };
2301 static struct ifinfomsg ifi = {
2302 .ifi_family = AF_BRIDGE
2303 };
2304 static struct rtattr ext_req = {
2305 .rta_type = IFLA_EXT_MASK,
2306 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2307 };
2308 uint32_t filter = RTEXT_FILTER_BRVLAN;
2309 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2310 struct bridge_vlan *vlan;
2311 struct nl_msg *msg;
2312 int i;
2313
2314 if (!data.ifindex)
2315 return 0;
2316
2317 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2318
2319 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2320 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2321 nlmsg_append(msg, &filter, sizeof(filter), 0))
2322 goto free;
2323
2324 vlist_for_each_element(&dev->vlans, vlan, node) {
2325 struct bridge_vlan_hotplug_port *port;
2326
2327 for (i = 0; i < vlan->n_ports; i++) {
2328 if (!strcmp(vlan->ports[i].ifname, ifname))
2329 vlan->ports[i].check = 0;
2330 else
2331 vlan->ports[i].check = -1;
2332 }
2333
2334 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2335 if (!strcmp(port->port.ifname, ifname))
2336 port->port.check = 0;
2337 else
2338 port->port.check = -1;
2339 }
2340 }
2341
2342 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2343 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2344 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2345 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2346
2347 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2348 goto free;
2349
2350 data.ret = 0;
2351 while (data.pending)
2352 nl_recvmsgs(sock_rtnl, cb);
2353
2354 vlist_for_each_element(&dev->vlans, vlan, node) {
2355 struct bridge_vlan_hotplug_port *port;
2356
2357 for (i = 0; i < vlan->n_ports; i++) {
2358 if (!vlan->ports[i].check) {
2359 data.ret = 1;
2360 break;
2361 }
2362 }
2363
2364 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2365 if (!port->port.check) {
2366 data.ret = 1;
2367 break;
2368 }
2369 }
2370 }
2371
2372 free:
2373 nlmsg_free(msg);
2374 nl_cb_put(cb);
2375 return data.ret;
2376 }
2377
2378 int system_if_check(struct device *dev)
2379 {
2380 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2381 struct nl_msg *msg;
2382 struct ifinfomsg ifi = {
2383 .ifi_family = AF_UNSPEC,
2384 .ifi_index = 0,
2385 };
2386 struct if_check_data chk = {
2387 .dev = dev,
2388 .pending = 1,
2389 };
2390 int ret = 1;
2391
2392 if (!cb)
2393 return ret;
2394
2395 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2396 if (!msg)
2397 goto out;
2398
2399 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2400 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2401 goto free;
2402
2403 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2404 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2405 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2406
2407 ret = nl_send_auto_complete(sock_rtnl, msg);
2408 if (ret < 0)
2409 goto free;
2410
2411 while (chk.pending > 0)
2412 nl_recvmsgs(sock_rtnl, cb);
2413
2414 ret = chk.pending;
2415
2416 free:
2417 nlmsg_free(msg);
2418 out:
2419 nl_cb_put(cb);
2420 return ret;
2421 }
2422
2423 struct device *
2424 system_if_get_parent(struct device *dev)
2425 {
2426 char buf[64], *devname;
2427 int ifindex, iflink;
2428
2429 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2430 return NULL;
2431
2432 iflink = strtoul(buf, NULL, 0);
2433 ifindex = system_if_resolve(dev);
2434 if (!iflink || iflink == ifindex)
2435 return NULL;
2436
2437 devname = if_indextoname(iflink, buf);
2438 if (!devname)
2439 return NULL;
2440
2441 return device_get(devname, true);
2442 }
2443
2444 static bool
2445 read_string_file(int dir_fd, const char *file, char *buf, int len)
2446 {
2447 bool ret = false;
2448 char *c;
2449 int fd;
2450
2451 fd = openat(dir_fd, file, O_RDONLY);
2452 if (fd < 0)
2453 return false;
2454
2455 retry:
2456 len = read(fd, buf, len - 1);
2457 if (len < 0) {
2458 if (errno == EINTR)
2459 goto retry;
2460 } else if (len > 0) {
2461 buf[len] = 0;
2462
2463 c = strchr(buf, '\n');
2464 if (c)
2465 *c = 0;
2466
2467 ret = true;
2468 }
2469
2470 close(fd);
2471
2472 return ret;
2473 }
2474
2475 static bool
2476 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2477 {
2478 char buf[64];
2479 bool ret = false;
2480
2481 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2482 if (ret)
2483 *val = strtoull(buf, NULL, 0);
2484
2485 return ret;
2486 }
2487
2488 bool
2489 system_if_force_external(const char *ifname)
2490 {
2491 struct stat s;
2492
2493 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2494 }
2495
2496 static const char *
2497 system_netdevtype_name(unsigned short dev_type)
2498 {
2499 size_t i;
2500
2501 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2502 if (netdev_types[i].id == dev_type)
2503 return netdev_types[i].name;
2504 }
2505
2506 /* the last key is used by default */
2507 i = ARRAY_SIZE(netdev_types) - 1;
2508
2509 return netdev_types[i].name;
2510 }
2511
2512 static void
2513 system_add_devtype(struct blob_buf *b, const char *ifname)
2514 {
2515 char buf[100];
2516 bool found = false;
2517
2518 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2519 const char *info = "DEVTYPE=";
2520 char *context = NULL;
2521 const char *line = strtok_r(buf, "\r\n", &context);
2522
2523 while (line != NULL) {
2524 char *index = strstr(line, info);
2525
2526 if (index != NULL) {
2527 blobmsg_add_string(b, "devtype", index + strlen(info));
2528 found = true;
2529 break;
2530 }
2531
2532 line = strtok_r(NULL, "\r\n", &context);
2533 }
2534 }
2535
2536 if (!found) {
2537 unsigned short number = 0;
2538 const char *name = NULL;
2539
2540 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2541 number = strtoul(buf, NULL, 0);
2542 name = system_netdevtype_name(number);
2543 blobmsg_add_string(b, "devtype", name);
2544 }
2545 }
2546 }
2547
2548 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2549
2550 static int32_t
2551 ethtool_feature_count(const char *ifname)
2552 {
2553 struct {
2554 struct ethtool_sset_info hdr;
2555 uint32_t buf;
2556 } req = {
2557 .hdr = {
2558 .cmd = ETHTOOL_GSSET_INFO,
2559 .sset_mask = 1 << ETH_SS_FEATURES
2560 }
2561 };
2562
2563 struct ifreq ifr = {
2564 .ifr_data = (void *)&req
2565 };
2566
2567 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2568
2569 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2570 return -1;
2571
2572 if (!req.hdr.sset_mask)
2573 return 0;
2574
2575 return req.buf;
2576 }
2577
2578 static int32_t
2579 ethtool_feature_index(const char *ifname, const char *keyname)
2580 {
2581 struct ethtool_gstrings *feature_names;
2582 struct ifreq ifr = { 0 };
2583 int32_t n_features;
2584 uint32_t i;
2585
2586 n_features = ethtool_feature_count(ifname);
2587
2588 if (n_features <= 0)
2589 return -1;
2590
2591 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2592
2593 if (!feature_names)
2594 return -1;
2595
2596 feature_names->cmd = ETHTOOL_GSTRINGS;
2597 feature_names->string_set = ETH_SS_FEATURES;
2598 feature_names->len = n_features;
2599
2600 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2601 ifr.ifr_data = (void *)feature_names;
2602
2603 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2604 free(feature_names);
2605
2606 return -1;
2607 }
2608
2609 for (i = 0; i < feature_names->len; i++)
2610 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2611 break;
2612
2613 if (i >= feature_names->len)
2614 i = -1;
2615
2616 free(feature_names);
2617
2618 return i;
2619 }
2620
2621 static bool
2622 ethtool_feature_value(const char *ifname, const char *keyname)
2623 {
2624 struct ethtool_get_features_block *feature_block;
2625 struct ethtool_gfeatures *feature_values;
2626 struct ifreq ifr = { 0 };
2627 int32_t feature_idx;
2628 bool active;
2629
2630 feature_idx = ethtool_feature_index(ifname, keyname);
2631
2632 if (feature_idx < 0)
2633 return false;
2634
2635 feature_values = calloc(1,
2636 sizeof(*feature_values) +
2637 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2638
2639 if (!feature_values)
2640 return false;
2641
2642 feature_values->cmd = ETHTOOL_GFEATURES;
2643 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2644
2645 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2646 ifr.ifr_data = (void *)feature_values;
2647
2648 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2649 free(feature_values);
2650
2651 return false;
2652 }
2653
2654 feature_block = &feature_values->features[feature_idx / 32];
2655 active = feature_block->active & (1U << feature_idx % 32);
2656
2657 free(feature_values);
2658
2659 return active;
2660 }
2661
2662 static void
2663 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2664 {
2665 char *buf;
2666
2667 /* allocate string buffer large enough for the mode name and a suffix
2668 * "-F" or "-H" indicating full duplex or half duplex.
2669 */
2670 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2671 if (!buf)
2672 return;
2673
2674 strcpy(buf, ethtool_modes[i].name);
2675 if (half)
2676 strcat(buf, "-H");
2677 else
2678 strcat(buf, "-F");
2679
2680 blobmsg_add_string_buffer(b);
2681 }
2682
2683 static void
2684 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2685 {
2686 size_t i;
2687
2688 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2689 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2690 system_add_link_mode_name(b, i, true);
2691
2692 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2693 system_add_link_mode_name(b, i, false);
2694 }
2695 }
2696
2697 static void
2698 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2699 {
2700 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2701 blobmsg_add_string(b, NULL, "pause");
2702
2703 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2704 blobmsg_add_string(b, NULL, "asym_pause");
2705 }
2706
2707
2708 static void
2709 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2710 __u32 *advertising, __u32 *lp_advertising)
2711 {
2712 bool an_rx = false, an_tx = false;
2713 void *d;
2714
2715 d = blobmsg_open_array(b, "negotiated");
2716
2717 /* Work out negotiated pause frame usage per
2718 * IEEE 802.3-2005 table 28B-3.
2719 */
2720 if (ethtool_link_mode_test_bit(nwords,
2721 ETHTOOL_LINK_MODE_Pause_BIT,
2722 advertising) &&
2723 ethtool_link_mode_test_bit(nwords,
2724 ETHTOOL_LINK_MODE_Pause_BIT,
2725 lp_advertising)) {
2726 an_tx = true;
2727 an_rx = true;
2728 } else if (ethtool_link_mode_test_bit(nwords,
2729 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2730 advertising) &&
2731 ethtool_link_mode_test_bit(nwords,
2732 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2733 lp_advertising)) {
2734 if (ethtool_link_mode_test_bit(nwords,
2735 ETHTOOL_LINK_MODE_Pause_BIT,
2736 advertising))
2737 an_rx = true;
2738 else if (ethtool_link_mode_test_bit(nwords,
2739 ETHTOOL_LINK_MODE_Pause_BIT,
2740 lp_advertising))
2741 an_tx = true;
2742 }
2743 if (an_tx)
2744 blobmsg_add_string(b, NULL, "rx");
2745
2746 if (an_rx)
2747 blobmsg_add_string(b, NULL, "tx");
2748
2749 blobmsg_close_array(b, d);
2750 }
2751
2752 static void
2753 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2754 {
2755 struct ethtool_pauseparam pp;
2756 struct ifreq ifr = {
2757 .ifr_data = (caddr_t)&pp,
2758 };
2759
2760 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2761 memset(&pp, 0, sizeof(pp));
2762 pp.cmd = ETHTOOL_GPAUSEPARAM;
2763
2764 /* may fail */
2765 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2766 *pause_autoneg = true;
2767 return;
2768 }
2769
2770 *rx_pause = pp.rx_pause;
2771 *tx_pause = pp.tx_pause;
2772 *pause_autoneg = pp.autoneg;
2773 }
2774
2775 int
2776 system_if_dump_info(struct device *dev, struct blob_buf *b)
2777 {
2778 __u32 *supported, *advertising, *lp_advertising;
2779 bool rx_pause, tx_pause, pause_autoneg;
2780 struct {
2781 struct ethtool_link_settings req;
2782 __u32 link_mode_data[3 * 127];
2783 } ecmd;
2784 struct ifreq ifr = {
2785 .ifr_data = (caddr_t)&ecmd,
2786 };
2787 __s8 nwords;
2788 void *c, *d;
2789 char *s;
2790
2791 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
2792
2793 memset(&ecmd, 0, sizeof(ecmd));
2794 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2795 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2796
2797 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2798 ecmd.req.link_mode_masks_nwords >= 0 ||
2799 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2800 return -EOPNOTSUPP;
2801
2802 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2803
2804 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2805 ecmd.req.link_mode_masks_nwords <= 0 ||
2806 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2807 return -EIO;
2808
2809 nwords = ecmd.req.link_mode_masks_nwords;
2810 supported = &ecmd.link_mode_data[0];
2811 advertising = &ecmd.link_mode_data[nwords];
2812 lp_advertising = &ecmd.link_mode_data[2 * nwords];
2813
2814 c = blobmsg_open_array(b, "link-advertising");
2815 system_add_link_modes(nwords, b, advertising);
2816 blobmsg_close_array(b, c);
2817
2818 c = blobmsg_open_array(b, "link-partner-advertising");
2819 system_add_link_modes(nwords, b, lp_advertising);
2820 blobmsg_close_array(b, c);
2821
2822 c = blobmsg_open_array(b, "link-supported");
2823 system_add_link_modes(nwords, b, supported);
2824 blobmsg_close_array(b, c);
2825
2826 if (ethtool_validate_speed(ecmd.req.speed) &&
2827 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
2828 (ecmd.req.speed != 0)) {
2829 s = blobmsg_alloc_string_buffer(b, "speed", 10);
2830 snprintf(s, 8, "%d%c", ecmd.req.speed,
2831 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
2832 blobmsg_add_string_buffer(b);
2833 }
2834 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
2835
2836 c = blobmsg_open_table(b, "flow-control");
2837 blobmsg_add_u8(b, "autoneg", pause_autoneg);
2838
2839 d = blobmsg_open_array(b, "supported");
2840 system_add_pause_modes(nwords, b, supported);
2841 blobmsg_close_array(b, d);
2842
2843 if (pause_autoneg) {
2844 d = blobmsg_open_array(b, "link-advertising");
2845 system_add_pause_modes(nwords, b, advertising);
2846 blobmsg_close_array(b, d);
2847 }
2848
2849 d = blobmsg_open_array(b, "link-partner-advertising");
2850 system_add_pause_modes(nwords, b, lp_advertising);
2851 blobmsg_close_array(b, d);
2852
2853 if (pause_autoneg) {
2854 system_add_ethtool_pause_an(b, nwords, advertising,
2855 lp_advertising);
2856 } else {
2857 d = blobmsg_open_array(b, "selected");
2858 if (rx_pause)
2859 blobmsg_add_string(b, NULL, "rx");
2860
2861 if (tx_pause)
2862 blobmsg_add_string(b, NULL, "tx");
2863
2864 blobmsg_close_array(b, d);
2865 }
2866
2867 blobmsg_close_table(b, c);
2868
2869 blobmsg_add_u8(b, "hw-tc-offload",
2870 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
2871
2872 system_add_devtype(b, dev->ifname);
2873
2874 return 0;
2875 }
2876
2877 int
2878 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2879 {
2880 const char *const counters[] = {
2881 "collisions", "rx_frame_errors", "tx_compressed",
2882 "multicast", "rx_length_errors", "tx_dropped",
2883 "rx_bytes", "rx_missed_errors", "tx_errors",
2884 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2885 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2886 "rx_dropped", "tx_aborted_errors", "tx_packets",
2887 "rx_errors", "tx_bytes", "tx_window_errors",
2888 "rx_fifo_errors", "tx_carrier_errors",
2889 };
2890 int stats_dir;
2891 size_t i;
2892 uint64_t val = 0;
2893
2894 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2895 if (stats_dir < 0)
2896 return -1;
2897
2898 for (i = 0; i < ARRAY_SIZE(counters); i++)
2899 if (read_uint64_file(stats_dir, counters[i], &val))
2900 blobmsg_add_u64(b, counters[i], val);
2901
2902 close(stats_dir);
2903 return 0;
2904 }
2905
2906 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2907 {
2908 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2909 int alen = v4 ? 4 : 16;
2910 unsigned int flags = 0;
2911 struct ifaddrmsg ifa = {
2912 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2913 .ifa_prefixlen = addr->mask,
2914 .ifa_index = dev->ifindex,
2915 };
2916
2917 struct nl_msg *msg;
2918 if (cmd == RTM_NEWADDR)
2919 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2920
2921 msg = nlmsg_alloc_simple(cmd, flags);
2922 if (!msg)
2923 return -1;
2924
2925 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2926 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2927 if (v4) {
2928 if (addr->broadcast)
2929 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2930 if (addr->point_to_point)
2931 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2932 } else {
2933 time_t now = system_get_rtime();
2934 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2935
2936 if (addr->preferred_until) {
2937 int64_t preferred = addr->preferred_until - now;
2938 if (preferred < 0)
2939 preferred = 0;
2940 else if (preferred > UINT32_MAX)
2941 preferred = UINT32_MAX;
2942
2943 cinfo.ifa_prefered = preferred;
2944 }
2945
2946 if (addr->valid_until) {
2947 int64_t valid = addr->valid_until - now;
2948 if (valid <= 0) {
2949 nlmsg_free(msg);
2950 return -1;
2951 }
2952 else if (valid > UINT32_MAX)
2953 valid = UINT32_MAX;
2954
2955 cinfo.ifa_valid = valid;
2956 }
2957
2958 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2959
2960 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2961 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2962 }
2963
2964 return system_rtnl_call(msg);
2965 }
2966
2967 int system_add_address(struct device *dev, struct device_addr *addr)
2968 {
2969 return system_addr(dev, addr, RTM_NEWADDR);
2970 }
2971
2972 int system_del_address(struct device *dev, struct device_addr *addr)
2973 {
2974 return system_addr(dev, addr, RTM_DELADDR);
2975 }
2976
2977 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2978 {
2979 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2980 unsigned int flags = 0;
2981 struct ndmsg ndm = {
2982 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2983 .ndm_ifindex = dev->ifindex,
2984 .ndm_state = NUD_PERMANENT,
2985 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2986 };
2987 struct nl_msg *msg;
2988
2989 if (cmd == RTM_NEWNEIGH)
2990 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2991
2992 msg = nlmsg_alloc_simple(cmd, flags);
2993
2994 if (!msg)
2995 return -1;
2996
2997 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2998
2999 nla_put(msg, NDA_DST, alen, &neighbor->addr);
3000 if (neighbor->flags & DEVNEIGH_MAC)
3001 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
3002
3003
3004 return system_rtnl_call(msg);
3005 }
3006
3007 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
3008 {
3009 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
3010 }
3011
3012 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
3013 {
3014 return system_neigh(dev, neighbor, RTM_DELNEIGH);
3015 }
3016
3017 static int system_rt(struct device *dev, struct device_route *route, int cmd)
3018 {
3019 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3020 bool have_gw;
3021 unsigned int flags = 0;
3022
3023 if (alen == 4)
3024 have_gw = !!route->nexthop.in.s_addr;
3025 else
3026 have_gw = route->nexthop.in6.s6_addr32[0] ||
3027 route->nexthop.in6.s6_addr32[1] ||
3028 route->nexthop.in6.s6_addr32[2] ||
3029 route->nexthop.in6.s6_addr32[3];
3030
3031 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
3032 ? route->table : RT_TABLE_MAIN;
3033
3034 struct rtmsg rtm = {
3035 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3036 .rtm_dst_len = route->mask,
3037 .rtm_src_len = route->sourcemask,
3038 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
3039 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
3040 .rtm_scope = RT_SCOPE_NOWHERE,
3041 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
3042 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
3043 };
3044 struct nl_msg *msg;
3045
3046 if (cmd == RTM_NEWROUTE) {
3047 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3048
3049 if (!dev) { /* Add null-route */
3050 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3051 rtm.rtm_type = RTN_UNREACHABLE;
3052 }
3053 else
3054 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3055 }
3056
3057 if (route->flags & DEVROUTE_TYPE) {
3058 rtm.rtm_type = route->type;
3059 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3060 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3061 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3062 rtm.rtm_table = RT_TABLE_LOCAL;
3063 }
3064
3065 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3066 rtm.rtm_scope = RT_SCOPE_HOST;
3067 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3068 rtm.rtm_type == RTN_ANYCAST) {
3069 rtm.rtm_scope = RT_SCOPE_LINK;
3070 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3071 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3072 rtm.rtm_type == RTN_THROW) {
3073 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3074 dev = NULL;
3075 }
3076 }
3077
3078 if (route->flags & DEVROUTE_NODEV)
3079 dev = NULL;
3080
3081 msg = nlmsg_alloc_simple(cmd, flags);
3082 if (!msg)
3083 return -1;
3084
3085 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3086
3087 if (route->mask)
3088 nla_put(msg, RTA_DST, alen, &route->addr);
3089
3090 if (route->sourcemask) {
3091 if (rtm.rtm_family == AF_INET)
3092 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3093 else
3094 nla_put(msg, RTA_SRC, alen, &route->source);
3095 }
3096
3097 if (route->metric > 0)
3098 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3099
3100 if (have_gw)
3101 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3102
3103 if (dev)
3104 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3105
3106 if (table >= 256)
3107 nla_put_u32(msg, RTA_TABLE, table);
3108
3109 if (route->flags & DEVROUTE_MTU) {
3110 struct nlattr *metrics;
3111
3112 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3113 goto nla_put_failure;
3114
3115 nla_put_u32(msg, RTAX_MTU, route->mtu);
3116
3117 nla_nest_end(msg, metrics);
3118 }
3119
3120 return system_rtnl_call(msg);
3121
3122 nla_put_failure:
3123 nlmsg_free(msg);
3124 return -ENOMEM;
3125 }
3126
3127 int system_add_route(struct device *dev, struct device_route *route)
3128 {
3129 return system_rt(dev, route, RTM_NEWROUTE);
3130 }
3131
3132 int system_del_route(struct device *dev, struct device_route *route)
3133 {
3134 return system_rt(dev, route, RTM_DELROUTE);
3135 }
3136
3137 int system_flush_routes(void)
3138 {
3139 const char *names[] = { "ipv4", "ipv6" };
3140 size_t i;
3141 int fd;
3142
3143 for (i = 0; i < ARRAY_SIZE(names); i++) {
3144 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3145 fd = open(dev_buf, O_WRONLY);
3146 if (fd < 0)
3147 continue;
3148
3149 if (write(fd, "-1", 2)) {}
3150 close(fd);
3151 }
3152 return 0;
3153 }
3154
3155 bool system_resolve_rt_type(const char *type, unsigned int *id)
3156 {
3157 return system_rtn_aton(type, id);
3158 }
3159
3160 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3161 {
3162 FILE *f;
3163 char *e, buf[128];
3164 unsigned int n, proto = 256;
3165 n = strtoul(type, &e, 0);
3166 if (!*e && e != type)
3167 proto = n;
3168 else if (!strcmp(type, "unspec"))
3169 proto = RTPROT_UNSPEC;
3170 else if (!strcmp(type, "kernel"))
3171 proto = RTPROT_KERNEL;
3172 else if (!strcmp(type, "boot"))
3173 proto = RTPROT_BOOT;
3174 else if (!strcmp(type, "static"))
3175 proto = RTPROT_STATIC;
3176 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3177 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3178 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3179 continue;
3180
3181 n = strtoul(e, NULL, 10);
3182 e = strtok(NULL, " \t\n");
3183
3184 if (e && !strcmp(e, type)) {
3185 proto = n;
3186 break;
3187 }
3188 }
3189 fclose(f);
3190 }
3191
3192 if (proto > 255)
3193 return false;
3194
3195 *id = proto;
3196 return true;
3197 }
3198
3199 bool system_resolve_rt_table(const char *name, unsigned int *id)
3200 {
3201 FILE *f;
3202 char *e, buf[128];
3203 unsigned int n, table = RT_TABLE_UNSPEC;
3204
3205 /* first try to parse table as number */
3206 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3207 table = n;
3208
3209 /* handle well known aliases */
3210 else if (!strcmp(name, "default"))
3211 table = RT_TABLE_DEFAULT;
3212 else if (!strcmp(name, "main"))
3213 table = RT_TABLE_MAIN;
3214 else if (!strcmp(name, "local"))
3215 table = RT_TABLE_LOCAL;
3216
3217 /* try to look up name in /etc/iproute2/rt_tables */
3218 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3219 {
3220 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3221 {
3222 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3223 continue;
3224
3225 n = strtoul(e, NULL, 10);
3226 e = strtok(NULL, " \t\n");
3227
3228 if (e && !strcmp(e, name))
3229 {
3230 table = n;
3231 break;
3232 }
3233 }
3234
3235 fclose(f);
3236 }
3237
3238 if (table == RT_TABLE_UNSPEC)
3239 return false;
3240
3241 *id = table;
3242 return true;
3243 }
3244
3245 bool system_is_default_rt_table(unsigned int id)
3246 {
3247 return (id == RT_TABLE_MAIN);
3248 }
3249
3250 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3251 {
3252 char *e;
3253 unsigned int n;
3254
3255 if (!strcmp(filter, "strict"))
3256 n = 1;
3257 else if (!strcmp(filter, "loose"))
3258 n = 2;
3259 else {
3260 n = strtoul(filter, &e, 0);
3261 if (*e || e == filter || n > 2)
3262 return false;
3263 }
3264
3265 *id = n;
3266 return true;
3267 }
3268
3269 static int system_iprule(struct iprule *rule, int cmd)
3270 {
3271 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3272
3273 struct nl_msg *msg;
3274 struct rtmsg rtm = {
3275 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3276 .rtm_protocol = RTPROT_STATIC,
3277 .rtm_scope = RT_SCOPE_UNIVERSE,
3278 .rtm_table = RT_TABLE_UNSPEC,
3279 .rtm_type = RTN_UNSPEC,
3280 .rtm_flags = 0,
3281 };
3282
3283 if (cmd == RTM_NEWRULE)
3284 rtm.rtm_type = RTN_UNICAST;
3285
3286 if (rule->invert)
3287 rtm.rtm_flags |= FIB_RULE_INVERT;
3288
3289 if (rule->flags & IPRULE_SRC)
3290 rtm.rtm_src_len = rule->src_mask;
3291
3292 if (rule->flags & IPRULE_DEST)
3293 rtm.rtm_dst_len = rule->dest_mask;
3294
3295 if (rule->flags & IPRULE_TOS)
3296 rtm.rtm_tos = rule->tos;
3297
3298 if (rule->flags & IPRULE_LOOKUP) {
3299 if (rule->lookup < 256)
3300 rtm.rtm_table = rule->lookup;
3301 }
3302
3303 if (rule->flags & IPRULE_ACTION)
3304 rtm.rtm_type = rule->action;
3305 else if (rule->flags & IPRULE_GOTO)
3306 rtm.rtm_type = FR_ACT_GOTO;
3307 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3308 rtm.rtm_type = FR_ACT_NOP;
3309
3310 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3311
3312 if (!msg)
3313 return -1;
3314
3315 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3316
3317 if (rule->flags & IPRULE_IN)
3318 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3319
3320 if (rule->flags & IPRULE_OUT)
3321 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3322
3323 if (rule->flags & IPRULE_SRC)
3324 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3325
3326 if (rule->flags & IPRULE_DEST)
3327 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3328
3329 if (rule->flags & IPRULE_PRIORITY)
3330 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3331 else if (cmd == RTM_NEWRULE)
3332 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3333
3334 if (rule->flags & IPRULE_FWMARK)
3335 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3336
3337 if (rule->flags & IPRULE_FWMASK)
3338 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3339
3340 if (rule->flags & IPRULE_LOOKUP) {
3341 if (rule->lookup >= 256)
3342 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3343 }
3344
3345 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3346 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3347
3348 if (rule->flags & IPRULE_UIDRANGE) {
3349 struct fib_rule_uid_range uidrange = {
3350 .start = rule->uidrange_start,
3351 .end = rule->uidrange_end
3352 };
3353
3354 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3355 }
3356
3357 if (rule->flags & IPRULE_GOTO)
3358 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3359
3360 return system_rtnl_call(msg);
3361 }
3362
3363 int system_add_iprule(struct iprule *rule)
3364 {
3365 return system_iprule(rule, RTM_NEWRULE);
3366 }
3367
3368 int system_del_iprule(struct iprule *rule)
3369 {
3370 return system_iprule(rule, RTM_DELRULE);
3371 }
3372
3373 int system_flush_iprules(void)
3374 {
3375 int rv = 0;
3376 struct iprule rule;
3377
3378 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3379 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3380
3381 memset(&rule, 0, sizeof(rule));
3382
3383
3384 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3385
3386 rule.priority = 0;
3387 rule.lookup = RT_TABLE_LOCAL;
3388 rv |= system_iprule(&rule, RTM_NEWRULE);
3389
3390 rule.priority = 32766;
3391 rule.lookup = RT_TABLE_MAIN;
3392 rv |= system_iprule(&rule, RTM_NEWRULE);
3393
3394 rule.priority = 32767;
3395 rule.lookup = RT_TABLE_DEFAULT;
3396 rv |= system_iprule(&rule, RTM_NEWRULE);
3397
3398
3399 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3400
3401 rule.priority = 0;
3402 rule.lookup = RT_TABLE_LOCAL;
3403 rv |= system_iprule(&rule, RTM_NEWRULE);
3404
3405 rule.priority = 32766;
3406 rule.lookup = RT_TABLE_MAIN;
3407 rv |= system_iprule(&rule, RTM_NEWRULE);
3408
3409 return rv;
3410 }
3411
3412 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3413 {
3414 return system_rtn_aton(action, id);
3415 }
3416
3417 time_t system_get_rtime(void)
3418 {
3419 struct timespec ts;
3420 struct timeval tv;
3421
3422 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3423 return ts.tv_sec;
3424
3425 if (gettimeofday(&tv, NULL) == 0)
3426 return tv.tv_sec;
3427
3428 return 0;
3429 }
3430
3431 #ifndef IP_DF
3432 #define IP_DF 0x4000
3433 #endif
3434
3435 static int tunnel_ioctl(const char *name, int cmd, void *p)
3436 {
3437 struct ifreq ifr;
3438
3439 memset(&ifr, 0, sizeof(ifr));
3440 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3441 ifr.ifr_ifru.ifru_data = p;
3442 return ioctl(sock_ioctl, cmd, &ifr);
3443 }
3444
3445 #ifdef IFLA_IPTUN_MAX
3446 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3447 struct blob_attr **tb)
3448 {
3449 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3450 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3451 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3452 struct blob_attr *cur;
3453 int ret = 0, ttl = 0;
3454
3455 if (!nlm)
3456 return -1;
3457
3458 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3459 nla_put_string(nlm, IFLA_IFNAME, name);
3460
3461 if (link)
3462 nla_put_u32(nlm, IFLA_LINK, link);
3463
3464 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3465 if (!linkinfo) {
3466 ret = -ENOMEM;
3467 goto failure;
3468 }
3469
3470 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3471 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3472 if (!infodata) {
3473 ret = -ENOMEM;
3474 goto failure;
3475 }
3476
3477 if (link)
3478 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3479
3480 if ((cur = tb[TUNNEL_ATTR_TTL]))
3481 ttl = blobmsg_get_u32(cur);
3482
3483 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3484 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3485
3486 struct in6_addr in6buf;
3487 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3488 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3489 ret = -EINVAL;
3490 goto failure;
3491 }
3492 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3493 }
3494
3495 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3496 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3497 ret = -EINVAL;
3498 goto failure;
3499 }
3500 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3501 }
3502
3503 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3504 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3505 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3506
3507 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3508 blobmsg_data(cur), blobmsg_len(cur));
3509
3510 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3511 char *str = blobmsg_get_string(cur);
3512
3513 if (strcmp(str, "ignore")) {
3514 char *e;
3515 unsigned encap_limit = strtoul(str, &e, 0);
3516
3517 if (e == str || *e || encap_limit > 255) {
3518 ret = -EINVAL;
3519 goto failure;
3520 }
3521
3522 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3523 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3524 }
3525 }
3526
3527 #ifdef IFLA_IPTUN_FMR_MAX
3528 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3529 struct blob_attr *rcur;
3530 unsigned rrem, fmrcnt = 0;
3531 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3532
3533 if (!fmrs) {
3534 ret = -ENOMEM;
3535 goto failure;
3536 }
3537
3538 blobmsg_for_each_attr(rcur, cur, rrem) {
3539 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3540 struct in6_addr ip6prefix;
3541 struct in_addr ip4prefix;
3542 unsigned ip4len, ip6len, ealen, offset;
3543
3544 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3545 blobmsg_data(rcur), blobmsg_len(rcur));
3546
3547 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3548 !parse_ip_and_netmask(AF_INET6,
3549 blobmsg_data(tb_cur), &ip6prefix,
3550 &ip6len)) {
3551 ret = -EINVAL;
3552 goto failure;
3553 }
3554
3555 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3556 !parse_ip_and_netmask(AF_INET,
3557 blobmsg_data(tb_cur), &ip4prefix,
3558 &ip4len)) {
3559 ret = -EINVAL;
3560 goto failure;
3561 }
3562
3563 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3564 ret = -EINVAL;
3565 goto failure;
3566 }
3567 ealen = blobmsg_get_u32(tb_cur);
3568
3569 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3570 ret = -EINVAL;
3571 goto failure;
3572 }
3573 offset = blobmsg_get_u32(tb_cur);
3574
3575 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3576 if (!rule) {
3577 ret = -ENOMEM;
3578 goto failure;
3579 }
3580
3581 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3582 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3583 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3584 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3585 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3586 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3587
3588 nla_nest_end(nlm, rule);
3589 }
3590
3591 nla_nest_end(nlm, fmrs);
3592 }
3593 #endif
3594 if (tun_flags)
3595 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3596 }
3597
3598 nla_nest_end(nlm, infodata);
3599 nla_nest_end(nlm, linkinfo);
3600
3601 return system_rtnl_call(nlm);
3602
3603 failure:
3604 nlmsg_free(nlm);
3605 return ret;
3606 }
3607 #endif
3608
3609 #ifdef IFLA_IPTUN_MAX
3610 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3611 static int system_add_gre_tunnel(const char *name, const char *kind,
3612 const unsigned int link, struct blob_attr **tb, bool v6)
3613 {
3614 struct nl_msg *nlm;
3615 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3616 struct blob_attr *cur;
3617 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3618 uint16_t iflags = 0, oflags = 0;
3619 uint8_t tos = 0;
3620 int ret = 0, ttl = 0;
3621 unsigned encap_limit = 0;
3622
3623 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3624 if (!nlm)
3625 return -1;
3626
3627 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3628 nla_put_string(nlm, IFLA_IFNAME, name);
3629
3630 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3631 if (!linkinfo) {
3632 ret = -ENOMEM;
3633 goto failure;
3634 }
3635
3636 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3637 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3638 if (!infodata) {
3639 ret = -ENOMEM;
3640 goto failure;
3641 }
3642
3643 if (link)
3644 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3645
3646 if ((cur = tb[TUNNEL_ATTR_TTL]))
3647 ttl = blobmsg_get_u32(cur);
3648
3649 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3650 char *str = blobmsg_get_string(cur);
3651 if (strcmp(str, "inherit")) {
3652 unsigned uval;
3653
3654 if (!system_tos_aton(str, &uval)) {
3655 ret = -EINVAL;
3656 goto failure;
3657 }
3658
3659 if (v6)
3660 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3661 else
3662 tos = uval;
3663 } else {
3664 if (v6)
3665 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3666 else
3667 tos = 1;
3668 }
3669 }
3670
3671 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3672 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3673
3674 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3675 blobmsg_data(cur), blobmsg_len(cur));
3676
3677 if ((cur = tb_data[GRE_DATA_IKEY])) {
3678 if ((ikey = blobmsg_get_u32(cur)))
3679 iflags |= GRE_KEY;
3680 }
3681
3682 if ((cur = tb_data[GRE_DATA_OKEY])) {
3683 if ((okey = blobmsg_get_u32(cur)))
3684 oflags |= GRE_KEY;
3685 }
3686
3687 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3688 if (blobmsg_get_bool(cur))
3689 iflags |= GRE_CSUM;
3690 }
3691
3692 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3693 if (blobmsg_get_bool(cur))
3694 oflags |= GRE_CSUM;
3695 }
3696
3697 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3698 if (blobmsg_get_bool(cur))
3699 iflags |= GRE_SEQ;
3700 }
3701
3702 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3703 if (blobmsg_get_bool(cur))
3704 oflags |= GRE_SEQ;
3705 }
3706
3707 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3708 char *str = blobmsg_get_string(cur);
3709
3710 if (strcmp(str, "ignore")) {
3711 char *e;
3712
3713 encap_limit = strtoul(str, &e, 0);
3714
3715 if (e == str || *e || encap_limit > 255) {
3716 ret = -EINVAL;
3717 goto failure;
3718 }
3719
3720 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3721 }
3722 }
3723 }
3724
3725 if (v6) {
3726 struct in6_addr in6buf;
3727 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3728 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3729 ret = -EINVAL;
3730 goto failure;
3731 }
3732 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3733 }
3734
3735 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3736 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3737 ret = -EINVAL;
3738 goto failure;
3739 }
3740 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3741 }
3742
3743 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3744 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3745
3746 if (flowinfo)
3747 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3748
3749 if (flags6)
3750 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3751
3752 if (!ttl)
3753 ttl = 64;
3754 } else {
3755 struct in_addr inbuf;
3756 bool set_df = true;
3757
3758 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3759 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3760 ret = -EINVAL;
3761 goto failure;
3762 }
3763 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3764 }
3765
3766 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3767 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3768 ret = -EINVAL;
3769 goto failure;
3770 }
3771 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3772
3773 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3774 if (!okey) {
3775 okey = inbuf.s_addr;
3776 oflags |= GRE_KEY;
3777 }
3778
3779 if (!ikey) {
3780 ikey = inbuf.s_addr;
3781 iflags |= GRE_KEY;
3782 }
3783 }
3784 }
3785
3786 if ((cur = tb[TUNNEL_ATTR_DF]))
3787 set_df = blobmsg_get_bool(cur);
3788
3789 if (!set_df) {
3790 /* ttl != 0 and nopmtudisc are incompatible */
3791 if (ttl) {
3792 ret = -EINVAL;
3793 goto failure;
3794 }
3795 } else if (!ttl)
3796 ttl = 64;
3797
3798 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3799
3800 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3801 }
3802
3803 if (ttl)
3804 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3805
3806 if (oflags)
3807 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3808
3809 if (iflags)
3810 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3811
3812 if (okey)
3813 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3814
3815 if (ikey)
3816 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3817
3818 nla_nest_end(nlm, infodata);
3819 nla_nest_end(nlm, linkinfo);
3820
3821 return system_rtnl_call(nlm);
3822
3823 failure:
3824 nlmsg_free(nlm);
3825 return ret;
3826 }
3827 #endif
3828
3829 #ifdef IFLA_VTI_MAX
3830 static int system_add_vti_tunnel(const char *name, const char *kind,
3831 const unsigned int link, struct blob_attr **tb, bool v6)
3832 {
3833 struct nl_msg *nlm;
3834 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3835 struct blob_attr *cur;
3836 int ret = 0;
3837
3838 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3839 if (!nlm)
3840 return -1;
3841
3842 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3843 nla_put_string(nlm, IFLA_IFNAME, name);
3844
3845 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3846 if (!linkinfo) {
3847 ret = -ENOMEM;
3848 goto failure;
3849 }
3850
3851 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3852 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3853 if (!infodata) {
3854 ret = -ENOMEM;
3855 goto failure;
3856 }
3857
3858 if (link)
3859 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3860
3861 if (v6) {
3862 struct in6_addr in6buf;
3863 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3864 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3865 ret = -EINVAL;
3866 goto failure;
3867 }
3868 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3869 }
3870
3871 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3872 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3873 ret = -EINVAL;
3874 goto failure;
3875 }
3876 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3877 }
3878
3879 } else {
3880 struct in_addr inbuf;
3881
3882 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3883 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3884 ret = -EINVAL;
3885 goto failure;
3886 }
3887 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3888 }
3889
3890 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3891 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3892 ret = -EINVAL;
3893 goto failure;
3894 }
3895 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3896 }
3897
3898 }
3899
3900 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3901 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3902 uint32_t ikey = 0, okey = 0;
3903
3904 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3905 blobmsg_data(cur), blobmsg_len(cur));
3906
3907 if ((cur = tb_data[VTI_DATA_IKEY])) {
3908 if ((ikey = blobmsg_get_u32(cur)))
3909 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3910 }
3911
3912 if ((cur = tb_data[VTI_DATA_OKEY])) {
3913 if ((okey = blobmsg_get_u32(cur)))
3914 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3915 }
3916 }
3917
3918 nla_nest_end(nlm, infodata);
3919 nla_nest_end(nlm, linkinfo);
3920
3921 return system_rtnl_call(nlm);
3922
3923 failure:
3924 nlmsg_free(nlm);
3925 return ret;
3926 }
3927 #endif
3928
3929 #ifdef IFLA_XFRM_MAX
3930 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3931 const unsigned int link, struct blob_attr **tb)
3932 {
3933 struct nl_msg *nlm;
3934 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3935 struct blob_attr *cur;
3936 int ret = 0;
3937
3938 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3939 if (!nlm)
3940 return -1;
3941
3942 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3943 nla_put_string(nlm, IFLA_IFNAME, name);
3944
3945 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3946 if (!linkinfo) {
3947 ret = -ENOMEM;
3948 goto failure;
3949 }
3950
3951 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3952 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3953 if (!infodata) {
3954 ret = -ENOMEM;
3955 goto failure;
3956 }
3957
3958 if (link)
3959 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3960
3961 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3962 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3963 uint32_t if_id = 0;
3964
3965 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3966 blobmsg_data(cur), blobmsg_len(cur));
3967
3968 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3969 if ((if_id = blobmsg_get_u32(cur)))
3970 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3971 }
3972
3973 }
3974
3975 nla_nest_end(nlm, infodata);
3976 nla_nest_end(nlm, linkinfo);
3977
3978 return system_rtnl_call(nlm);
3979
3980 failure:
3981 nlmsg_free(nlm);
3982 return ret;
3983 }
3984 #endif
3985
3986 #ifdef IFLA_VXLAN_MAX
3987 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3988 struct blob_attr *cur;
3989 if ((cur = tb_data[vxlandatatype])) {
3990 bool val = blobmsg_get_bool(cur);
3991 if (invert)
3992 val = !val;
3993
3994 if ((attrtype == IFLA_VXLAN_GBP) && val)
3995 nla_put_flag(msg, attrtype);
3996 else
3997 nla_put_u8(msg, attrtype, val);
3998
3999 }
4000 }
4001
4002 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
4003 {
4004 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
4005 struct nl_msg *msg;
4006 struct nlattr *linkinfo, *data;
4007 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
4008 struct blob_attr *cur;
4009 int ret = 0;
4010
4011 if ((cur = tb[TUNNEL_ATTR_DATA]))
4012 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
4013 blobmsg_data(cur), blobmsg_len(cur));
4014 else
4015 return -EINVAL;
4016
4017 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
4018
4019 if (!msg)
4020 return -1;
4021
4022 nlmsg_append(msg, &iim, sizeof(iim), 0);
4023
4024 nla_put_string(msg, IFLA_IFNAME, name);
4025
4026 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
4027 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
4028 if (!ea) {
4029 ret = -EINVAL;
4030 goto failure;
4031 }
4032
4033 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
4034 }
4035
4036 if ((cur = tb[TUNNEL_ATTR_MTU])) {
4037 uint32_t mtu = blobmsg_get_u32(cur);
4038 nla_put_u32(msg, IFLA_MTU, mtu);
4039 }
4040
4041 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
4042 ret = -ENOMEM;
4043 goto failure;
4044 }
4045
4046 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
4047
4048 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
4049 ret = -ENOMEM;
4050 goto failure;
4051 }
4052
4053 if (link)
4054 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
4055
4056 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4057 uint32_t id = blobmsg_get_u32(cur);
4058 if (id >= (1u << 24) - 1) {
4059 ret = -EINVAL;
4060 goto failure;
4061 }
4062
4063 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4064 }
4065
4066 if (v6) {
4067 struct in6_addr in6buf;
4068 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4069 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4070 ret = -EINVAL;
4071 goto failure;
4072 }
4073 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4074 }
4075
4076 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4077 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4078 ret = -EINVAL;
4079 goto failure;
4080 }
4081 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4082 }
4083 } else {
4084 struct in_addr inbuf;
4085
4086 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4087 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4088 ret = -EINVAL;
4089 goto failure;
4090 }
4091 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4092 }
4093
4094 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4095 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4096 ret = -EINVAL;
4097 goto failure;
4098 }
4099 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4100 }
4101 }
4102
4103 uint32_t port = 4789;
4104 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4105 port = blobmsg_get_u32(cur);
4106 if (port < 1 || port > 65535) {
4107 ret = -EINVAL;
4108 goto failure;
4109 }
4110 }
4111 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4112
4113 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4114 struct ifla_vxlan_port_range srcports = {0,0};
4115
4116 uint32_t low = blobmsg_get_u32(cur);
4117 if (low < 1 || low > 65535 - 1) {
4118 ret = -EINVAL;
4119 goto failure;
4120 }
4121
4122 srcports.low = htons((uint16_t) low);
4123 srcports.high = htons((uint16_t) (low+1));
4124
4125 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4126 uint32_t high = blobmsg_get_u32(cur);
4127 if (high < 1 || high > 65535) {
4128 ret = -EINVAL;
4129 goto failure;
4130 }
4131
4132 if (high > low)
4133 srcports.high = htons((uint16_t) high);
4134 }
4135
4136 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4137 }
4138
4139 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4140 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4141 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4142 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4143 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4144 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4145 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4146 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4147 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4148
4149 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4150 uint32_t ageing = blobmsg_get_u32(cur);
4151 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4152 }
4153
4154 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4155 uint32_t maxaddress = blobmsg_get_u32(cur);
4156 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4157 }
4158
4159 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4160 char *str = blobmsg_get_string(cur);
4161 unsigned tos = 1;
4162
4163 if (strcmp(str, "inherit")) {
4164 if (!system_tos_aton(str, &tos)) {
4165 ret = -EINVAL;
4166 goto failure;
4167 }
4168 }
4169
4170 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4171 }
4172
4173 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4174 uint32_t ttl = blobmsg_get_u32(cur);
4175 if (ttl < 1 || ttl > 255) {
4176 ret = -EINVAL;
4177 goto failure;
4178 }
4179
4180 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4181 }
4182
4183 nla_nest_end(msg, data);
4184 nla_nest_end(msg, linkinfo);
4185
4186 ret = system_rtnl_call(msg);
4187 if (ret)
4188 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
4189
4190 return ret;
4191
4192 failure:
4193 nlmsg_free(msg);
4194 return ret;
4195 }
4196 #endif
4197
4198 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4199 {
4200 struct blob_attr *cur;
4201 int ret = 0;
4202
4203 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4204 return -1;
4205
4206 #ifdef SIOCADD6RD
4207 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4208 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4209 unsigned int mask;
4210 struct ip_tunnel_6rd p6;
4211
4212 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4213 blobmsg_data(cur), blobmsg_len(cur));
4214
4215 memset(&p6, 0, sizeof(p6));
4216
4217 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4218 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4219 &p6.prefix, &mask) || mask > 128) {
4220 ret = -EINVAL;
4221 goto failure;
4222 }
4223
4224 p6.prefixlen = mask;
4225 }
4226
4227 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4228 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4229 &p6.relay_prefix, &mask) || mask > 32) {
4230 ret = -EINVAL;
4231 goto failure;
4232 }
4233
4234 p6.relay_prefixlen = mask;
4235 }
4236
4237 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4238 ret = -1;
4239 goto failure;
4240 }
4241 }
4242 #endif
4243
4244 return ret;
4245
4246 failure:
4247 system_link_del(name);
4248 return ret;
4249 }
4250
4251 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4252 {
4253 struct blob_attr *cur;
4254 bool set_df = true;
4255 struct ip_tunnel_parm p = {
4256 .link = link,
4257 .iph = {
4258 .version = 4,
4259 .ihl = 5,
4260 .protocol = proto,
4261 }
4262 };
4263
4264 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4265 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4266 return -EINVAL;
4267
4268 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4269 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4270 return -EINVAL;
4271
4272 if ((cur = tb[TUNNEL_ATTR_DF]))
4273 set_df = blobmsg_get_bool(cur);
4274
4275 if ((cur = tb[TUNNEL_ATTR_TTL]))
4276 p.iph.ttl = blobmsg_get_u32(cur);
4277
4278 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4279 char *str = blobmsg_get_string(cur);
4280 if (strcmp(str, "inherit")) {
4281 unsigned uval;
4282
4283 if (!system_tos_aton(str, &uval))
4284 return -EINVAL;
4285
4286 p.iph.tos = uval;
4287 } else
4288 p.iph.tos = 1;
4289 }
4290
4291 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4292 /* ttl !=0 and nopmtudisc are incompatible */
4293 if (p.iph.ttl && p.iph.frag_off == 0)
4294 return -EINVAL;
4295
4296 strncpy(p.name, name, sizeof(p.name) - 1);
4297
4298 switch (p.iph.protocol) {
4299 case IPPROTO_IPIP:
4300 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4301 case IPPROTO_IPV6:
4302 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4303 default:
4304 break;
4305 }
4306 return -1;
4307 }
4308
4309 int system_del_ip_tunnel(const struct device *dev)
4310 {
4311 return system_link_del(dev->ifname);
4312 }
4313
4314 int system_update_ipv6_mtu(struct device *dev, int mtu)
4315 {
4316 int ret = -1;
4317 char buf[64];
4318 int fd;
4319
4320 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4321 if (fd < 0)
4322 return ret;
4323
4324 if (!mtu) {
4325 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4326 if (len < 0)
4327 goto out;
4328
4329 buf[len] = 0;
4330 ret = atoi(buf);
4331 } else {
4332 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4333 ret = mtu;
4334 }
4335
4336 out:
4337 close(fd);
4338 return ret;
4339 }
4340
4341 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4342 {
4343 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4344 struct blob_attr *cur;
4345 const char *str;
4346
4347 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4348 blob_data(attr), blob_len(attr));
4349
4350 system_link_del(dev->ifname);
4351
4352 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4353 return -EINVAL;
4354 str = blobmsg_data(cur);
4355
4356 unsigned int ttl = 0;
4357 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4358 ttl = blobmsg_get_u32(cur);
4359 if (ttl > 255)
4360 return -EINVAL;
4361 }
4362
4363 unsigned int link = 0;
4364 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4365 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4366 if (!iface)
4367 return -EINVAL;
4368
4369 if (iface->l3_dev.dev)
4370 link = iface->l3_dev.dev->ifindex;
4371 }
4372
4373 if (!strcmp(str, "sit"))
4374 return system_add_sit_tunnel(dev->ifname, link, tb);
4375 #ifdef IFLA_IPTUN_MAX
4376 else if (!strcmp(str, "ipip6")) {
4377 return system_add_ip6_tunnel(dev->ifname, link, tb);
4378 } else if (!strcmp(str, "greip")) {
4379 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4380 } else if (!strcmp(str, "gretapip")) {
4381 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4382 } else if (!strcmp(str, "greip6")) {
4383 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4384 } else if (!strcmp(str, "gretapip6")) {
4385 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4386 #ifdef IFLA_VTI_MAX
4387 } else if (!strcmp(str, "vtiip")) {
4388 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4389 } else if (!strcmp(str, "vtiip6")) {
4390 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4391 #endif
4392 #ifdef IFLA_XFRM_MAX
4393 } else if (!strcmp(str, "xfrm")) {
4394 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4395 #endif
4396 #ifdef IFLA_VXLAN_MAX
4397 } else if(!strcmp(str, "vxlan")) {
4398 return system_add_vxlan(dev->ifname, link, tb, false);
4399 } else if(!strcmp(str, "vxlan6")) {
4400 return system_add_vxlan(dev->ifname, link, tb, true);
4401 #endif
4402 #endif
4403 } else if (!strcmp(str, "ipip")) {
4404 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4405 }
4406 else
4407 return -EINVAL;
4408
4409 return 0;
4410 }
OpenWrt Network interface configuration daemon