projects / project / netifd.git / blob
? search:


0760e73f1cf3d9b9a3975b7c28f91e22ae52ac12
[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 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77 #include "utils.h"
78
79 struct event_socket {
80 struct uloop_fd uloop;
81 struct nl_sock *sock;
82 int bufsize;
83 };
84
85 static int sock_ioctl = -1;
86 static struct nl_sock *sock_rtnl = NULL;
87
88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
91 const unsigned int link, struct blob_attr **tb);
92
93 static char dev_buf[256];
94 static const char *proc_path = "/proc";
95 static const char *sysfs_path = "/sys";
96
97 struct netdev_type {
98 unsigned short id;
99 const char *name;
100 };
101
102 static const struct netdev_type netdev_types[] = {
103 {ARPHRD_NETROM, "netrom"},
104 {ARPHRD_ETHER, "ethernet"},
105 {ARPHRD_EETHER, "eethernet"},
106 {ARPHRD_AX25, "ax25"},
107 {ARPHRD_PRONET, "pronet"},
108 {ARPHRD_CHAOS, "chaos"},
109 {ARPHRD_IEEE802, "ieee802"},
110 {ARPHRD_ARCNET, "arcnet"},
111 {ARPHRD_APPLETLK, "appletlk"},
112 {ARPHRD_DLCI, "dlci"},
113 {ARPHRD_ATM, "atm"},
114 {ARPHRD_METRICOM, "metricom"},
115 {ARPHRD_IEEE1394, "ieee1394"},
116 {ARPHRD_EUI64, "eui64"},
117 {ARPHRD_INFINIBAND, "infiniband"},
118 {ARPHRD_SLIP, "slip"},
119 {ARPHRD_CSLIP, "cslip"},
120 {ARPHRD_SLIP6, "slip6"},
121 {ARPHRD_CSLIP6, "cslip6"},
122 {ARPHRD_RSRVD, "rsrvd"},
123 {ARPHRD_ADAPT, "adapt"},
124 {ARPHRD_ROSE, "rose"},
125 {ARPHRD_X25, "x25"},
126 {ARPHRD_HWX25, "hwx25"},
127 {ARPHRD_PPP, "ppp"},
128 {ARPHRD_CISCO, "cisco"},
129 {ARPHRD_LAPB, "lapb"},
130 {ARPHRD_DDCMP, "ddcmp"},
131 {ARPHRD_RAWHDLC, "rawhdlc"},
132 {ARPHRD_TUNNEL, "tunnel"},
133 {ARPHRD_TUNNEL6, "tunnel6"},
134 {ARPHRD_FRAD, "frad"},
135 {ARPHRD_SKIP, "skip"},
136 {ARPHRD_LOOPBACK, "loopback"},
137 {ARPHRD_LOCALTLK, "localtlk"},
138 {ARPHRD_FDDI, "fddi"},
139 {ARPHRD_BIF, "bif"},
140 {ARPHRD_SIT, "sit"},
141 {ARPHRD_IPDDP, "ipddp"},
142 {ARPHRD_IPGRE, "ipgre"},
143 {ARPHRD_PIMREG,"pimreg"},
144 {ARPHRD_HIPPI, "hippi"},
145 {ARPHRD_ASH, "ash"},
146 {ARPHRD_ECONET, "econet"},
147 {ARPHRD_IRDA, "irda"},
148 {ARPHRD_FCPP, "fcpp"},
149 {ARPHRD_FCAL, "fcal"},
150 {ARPHRD_FCPL, "fcpl"},
151 {ARPHRD_FCFABRIC, "fcfabric"},
152 {ARPHRD_IEEE80211, "ieee80211"},
153 {ARPHRD_IEEE80211_PRISM, "ie80211-prism"},
154 {ARPHRD_IEEE80211_RADIOTAP, "ieee80211-radiotap"},
155 #ifdef ARPHRD_PHONET
156 {ARPHRD_PHONET, "phonet"},
157 #endif
158 #ifdef ARPHRD_PHONET_PIPE
159 {ARPHRD_PHONET_PIPE, "phonet-pipe"},
160 #endif
161 {ARPHRD_IEEE802154, "ieee802154"},
162 {ARPHRD_VOID, "void"},
163 {ARPHRD_NONE, "none"}
164 };
165
166 static void
167 handler_nl_event(struct uloop_fd *u, unsigned int events)
168 {
169 struct event_socket *ev = container_of(u, struct event_socket, uloop);
170 int err;
171 socklen_t errlen = sizeof(err);
172
173 if (!u->error) {
174 nl_recvmsgs_default(ev->sock);
175 return;
176 }
177
178 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
179 goto abort;
180
181 switch(err) {
182 case ENOBUFS:
183 /* Increase rx buffer size on netlink socket */
184 ev->bufsize *= 2;
185 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
186 goto abort;
187
188 /* Request full dump since some info got dropped */
189 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
190 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
191 break;
192
193 default:
194 goto abort;
195 }
196 u->error = false;
197 return;
198
199 abort:
200 uloop_fd_delete(&ev->uloop);
201 return;
202 }
203
204 static struct nl_sock *
205 create_socket(int protocol, int groups)
206 {
207 struct nl_sock *sock;
208
209 sock = nl_socket_alloc();
210 if (!sock)
211 return NULL;
212
213 if (groups)
214 nl_join_groups(sock, groups);
215
216 if (nl_connect(sock, protocol)) {
217 nl_socket_free(sock);
218 return NULL;
219 }
220
221 return sock;
222 }
223
224 static bool
225 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
226 uloop_fd_handler cb, int flags)
227 {
228 ev->sock = create_socket(protocol, groups);
229 if (!ev->sock)
230 return false;
231
232 ev->uloop.fd = nl_socket_get_fd(ev->sock);
233 ev->uloop.cb = cb;
234 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
235 return false;
236
237 return true;
238 }
239
240 static bool
241 create_event_socket(struct event_socket *ev, int protocol,
242 int (*cb)(struct nl_msg *msg, void *arg))
243 {
244 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
245 return false;
246
247 /* Install the valid custom callback handler */
248 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
249
250 /* Disable sequence number checking on event sockets */
251 nl_socket_disable_seq_check(ev->sock);
252
253 /* Increase rx buffer size to 65K on event sockets */
254 ev->bufsize = 65535;
255 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
256 return false;
257
258 return true;
259 }
260
261 static bool
262 create_hotplug_event_socket(struct event_socket *ev, int protocol,
263 void (*cb)(struct uloop_fd *u, unsigned int events))
264 {
265 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
266 return false;
267
268 /* Increase rx buffer size to 65K on event sockets */
269 ev->bufsize = 65535;
270 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
271 return false;
272
273 return true;
274 }
275
276 static bool
277 system_rtn_aton(const char *src, unsigned int *dst)
278 {
279 char *e;
280 unsigned int n;
281
282 if (!strcmp(src, "local"))
283 n = RTN_LOCAL;
284 else if (!strcmp(src, "nat"))
285 n = RTN_NAT;
286 else if (!strcmp(src, "broadcast"))
287 n = RTN_BROADCAST;
288 else if (!strcmp(src, "anycast"))
289 n = RTN_ANYCAST;
290 else if (!strcmp(src, "multicast"))
291 n = RTN_MULTICAST;
292 else if (!strcmp(src, "prohibit"))
293 n = RTN_PROHIBIT;
294 else if (!strcmp(src, "unreachable"))
295 n = RTN_UNREACHABLE;
296 else if (!strcmp(src, "blackhole"))
297 n = RTN_BLACKHOLE;
298 else if (!strcmp(src, "xresolve"))
299 n = RTN_XRESOLVE;
300 else if (!strcmp(src, "unicast"))
301 n = RTN_UNICAST;
302 else if (!strcmp(src, "throw"))
303 n = RTN_THROW;
304 else if (!strcmp(src, "failed_policy"))
305 n = RTN_FAILED_POLICY;
306 else {
307 n = strtoul(src, &e, 0);
308 if (!e || *e || e == src || n > 255)
309 return false;
310 }
311
312 *dst = n;
313 return true;
314 }
315
316 static bool
317 system_tos_aton(const char *src, unsigned *dst)
318 {
319 char *e;
320
321 *dst = strtoul(src, &e, 16);
322 if (e == src || *e || *dst > 255)
323 return false;
324
325 return true;
326 }
327
328 int system_init(void)
329 {
330 static struct event_socket rtnl_event;
331 static struct event_socket hotplug_event;
332
333 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
334 system_fd_set_cloexec(sock_ioctl);
335
336 /* Prepare socket for routing / address control */
337 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
338 if (!sock_rtnl)
339 return -1;
340
341 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
342 return -1;
343
344 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
345 handle_hotplug_event))
346 return -1;
347
348 /* Receive network link events form kernel */
349 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
350
351 return 0;
352 }
353
354 static void write_file(const char *path, const char *val)
355 {
356 int fd;
357
358 fd = open(path, O_WRONLY);
359 if (fd < 0)
360 return;
361
362 if (write(fd, val, strlen(val))) {}
363 close(fd);
364 }
365
366 static int read_file(const char *path, char *buf, const size_t buf_sz)
367 {
368 int fd = -1, ret = -1;
369
370 fd = open(path, O_RDONLY);
371 if (fd < 0)
372 goto out;
373
374 ssize_t len = read(fd, buf, buf_sz - 1);
375 if (len < 0)
376 goto out;
377
378 ret = buf[len] = 0;
379
380 out:
381 if (fd >= 0)
382 close(fd);
383
384 return ret;
385 }
386
387
388 static const char *
389 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
390 {
391 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
392
393 return dev_buf;
394 }
395
396 static const char *
397 dev_sysfs_path(const char *ifname, const char *file)
398 {
399 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
400
401 return dev_buf;
402 }
403
404 static void
405 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
406 const char *val)
407 {
408 write_file(dev_sysctl_path(prefix, ifname, file), val);
409 }
410
411 static int
412 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
413 char *buf, size_t buf_sz)
414 {
415 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
416 }
417
418 static void
419 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
420 {
421 if (!val)
422 return;
423
424 write_file(dev_sysfs_path(ifname, file), val);
425 }
426
427 static void
428 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
429 {
430 char buf[16];
431
432 snprintf(buf, sizeof(buf), "%d", val);
433 system_set_dev_sysfs(file, ifname, buf);
434 }
435
436 static int
437 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
438 {
439 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
440 }
441
442 static void system_set_disable_ipv6(struct device *dev, const char *val)
443 {
444 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
445 }
446
447 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
448 {
449 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
450 }
451
452 static void system_set_rpfilter(struct device *dev, const char *val)
453 {
454 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
455 }
456
457 static void system_set_acceptlocal(struct device *dev, const char *val)
458 {
459 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
460 }
461
462 static void system_set_igmpversion(struct device *dev, const char *val)
463 {
464 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
465 }
466
467 static void system_set_mldversion(struct device *dev, const char *val)
468 {
469 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
470 }
471
472 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
473 {
474 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
475 }
476
477 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
478 {
479 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
480 }
481
482 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
483 {
484 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
485 }
486
487 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
488 {
489 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
490 }
491
492 static void system_set_neigh4locktime(struct device *dev, const char *val)
493 {
494 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
495 }
496
497 static void system_set_dadtransmits(struct device *dev, const char *val)
498 {
499 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
500 }
501
502 static void system_set_sendredirects(struct device *dev, const char *val)
503 {
504 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
505 }
506
507 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
508 {
509 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
510 }
511
512 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
513 {
514 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
515 }
516
517 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
518 {
519 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
520 }
521
522 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
523 {
524 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
525 }
526
527 static void system_set_arp_accept(struct device *dev, const char *val)
528 {
529 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
530 }
531
532 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
533 {
534 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
535 }
536
537 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
538 {
539 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
540 }
541
542 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
543 {
544 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
545 }
546
547 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
548 {
549 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
550 }
551
552 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
553 {
554 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
555 }
556
557 static void system_bridge_set_isolated(struct device *dev, const char *val)
558 {
559 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
560 }
561
562 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
563 {
564 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
565 }
566
567 void system_bridge_set_stp_state(struct device *dev, bool val)
568 {
569 const char *valstr = val ? "1" : "0";
570
571 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
572 }
573
574 static void system_bridge_set_learning(struct device *dev, const char *val)
575 {
576 system_set_dev_sysfs("brport/learning", dev->ifname, val);
577 }
578
579 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
580 {
581 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
582 }
583
584 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
585 {
586 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
587 dev->ifname, buf, buf_sz);
588 }
589
590 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
591 {
592 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
593 dev->ifname, buf, buf_sz);
594 }
595
596 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
597 {
598 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
599 dev->ifname, buf, buf_sz);
600 }
601
602 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
603 {
604 return system_get_dev_sysctl("ipv4/conf", "accept_local",
605 dev->ifname, buf, buf_sz);
606 }
607
608 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
609 {
610 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
611 dev->ifname, buf, buf_sz);
612 }
613
614 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
615 {
616 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
617 dev->ifname, buf, buf_sz);
618 }
619
620 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
621 {
622 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
623 dev->ifname, buf, buf_sz);
624 }
625
626 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
627 {
628 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
629 dev->ifname, buf, buf_sz);
630 }
631
632 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
633 {
634 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
635 dev->ifname, buf, buf_sz);
636 }
637
638 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
639 {
640 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
641 dev->ifname, buf, buf_sz);
642 }
643
644 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
645 {
646 return system_get_dev_sysctl("ipv4/neigh", "locktime",
647 dev->ifname, buf, buf_sz);
648 }
649
650 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
651 {
652 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
653 dev->ifname, buf, buf_sz);
654 }
655
656 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
657 {
658 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
659 dev->ifname, buf, buf_sz);
660 }
661
662
663 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
664 {
665 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
666 dev->ifname, buf, buf_sz);
667 }
668
669 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
670 {
671 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
672 dev->ifname, buf, buf_sz);
673 }
674
675 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
676 {
677 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
678 dev->ifname, buf, buf_sz);
679 }
680
681 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
682 {
683 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
684 dev->ifname, buf, buf_sz);
685 }
686
687 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
688 {
689 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
690 dev->ifname, buf, buf_sz);
691 }
692
693 /* Evaluate netlink messages */
694 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
695 {
696 struct nlmsghdr *nh = nlmsg_hdr(msg);
697 struct nlattr *nla[__IFLA_MAX];
698 int link_state = 0;
699 char buf[10];
700
701 if (nh->nlmsg_type != RTM_NEWLINK)
702 goto out;
703
704 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
705 if (!nla[IFLA_IFNAME])
706 goto out;
707
708 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
709 if (!dev)
710 goto out;
711
712 if (!system_get_dev_sysfs("carrier", dev->ifname, buf, sizeof(buf)))
713 link_state = strtoul(buf, NULL, 0);
714
715 if (dev->type == &simple_device_type)
716 device_set_present(dev, true);
717
718 device_set_link(dev, link_state ? true : false);
719
720 out:
721 return 0;
722 }
723
724 static void
725 handle_hotplug_msg(char *data, int size)
726 {
727 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
728 char *cur, *end, *sep;
729 int skip;
730 bool add;
731
732 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
733 add = true;
734 else if (!strncmp(data, "remove@", 7))
735 add = false;
736 else
737 return;
738
739 skip = strlen(data) + 1;
740 end = data + size;
741
742 for (cur = data + skip; cur < end; cur += skip) {
743 skip = strlen(cur) + 1;
744
745 sep = strchr(cur, '=');
746 if (!sep)
747 continue;
748
749 *sep = 0;
750 if (!strcmp(cur, "INTERFACE"))
751 interface = sep + 1;
752 else if (!strcmp(cur, "SUBSYSTEM")) {
753 subsystem = sep + 1;
754 if (strcmp(subsystem, "net") != 0)
755 return;
756 } else if (!strcmp(cur, "DEVPATH_OLD")) {
757 interface_old = strrchr(sep + 1, '/');
758 if (interface_old)
759 interface_old++;
760 }
761 }
762
763 if (!subsystem || !interface)
764 return;
765
766 if (interface_old)
767 device_hotplug_event(interface_old, false);
768
769 device_hotplug_event(interface, add);
770 }
771
772 static void
773 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
774 {
775 struct event_socket *ev = container_of(u, struct event_socket, uloop);
776 struct sockaddr_nl nla;
777 unsigned char *buf = NULL;
778 int size;
779 int err;
780 socklen_t errlen = sizeof(err);
781
782 if (!u->error) {
783 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
784 if (nla.nl_pid == 0)
785 handle_hotplug_msg((char *) buf, size);
786
787 free(buf);
788 }
789 return;
790 }
791
792 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
793 goto abort;
794
795 switch(err) {
796 case ENOBUFS:
797 /* Increase rx buffer size on netlink socket */
798 ev->bufsize *= 2;
799 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
800 goto abort;
801 break;
802
803 default:
804 goto abort;
805 }
806 u->error = false;
807 return;
808
809 abort:
810 uloop_fd_delete(&ev->uloop);
811 return;
812 }
813
814 static int system_rtnl_call(struct nl_msg *msg)
815 {
816 int ret;
817
818 ret = nl_send_auto_complete(sock_rtnl, msg);
819 nlmsg_free(msg);
820
821 if (ret < 0)
822 return ret;
823
824 return nl_wait_for_ack(sock_rtnl);
825 }
826
827 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
828 {
829 struct nl_msg *msg;
830 struct ifinfomsg iim = {
831 .ifi_family = af,
832 .ifi_index = index,
833 };
834
835 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
836 if (!msg)
837 return NULL;
838
839 nlmsg_append(msg, &iim, sizeof(iim), 0);
840 if (ifname)
841 nla_put_string(msg, IFLA_IFNAME, ifname);
842
843 return msg;
844 }
845
846 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
847 {
848 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
849 }
850
851 static int system_link_del(const char *ifname)
852 {
853 struct nl_msg *msg;
854
855 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
856 if (!msg)
857 return -1;
858
859 return system_rtnl_call(msg);
860 }
861
862 int system_bridge_delbr(struct device *bridge)
863 {
864 return system_link_del(bridge->ifname);
865 }
866
867 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
868 {
869 struct ifreq ifr;
870
871 memset(&ifr, 0, sizeof(ifr));
872 if (dev)
873 ifr.ifr_ifindex = dev->ifindex;
874 else
875 ifr.ifr_data = data;
876 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
877 return ioctl(sock_ioctl, cmd, &ifr);
878 }
879
880 static bool system_is_bridge(const char *name)
881 {
882 struct stat st;
883
884 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
885 }
886
887 static char *system_get_bridge(const char *name, char *buf, int buflen)
888 {
889 char *path;
890 ssize_t len = -1;
891 glob_t gl;
892
893 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
894 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
895 return NULL;
896
897 if (gl.gl_pathc > 0)
898 len = readlink(gl.gl_pathv[0], buf, buflen);
899
900 globfree(&gl);
901
902 if (len < 0)
903 return NULL;
904
905 buf[len] = 0;
906 path = strrchr(buf, '/');
907 if (!path)
908 return NULL;
909
910 return path + 1;
911 }
912
913 static void
914 system_bridge_set_wireless(struct device *bridge, struct device *dev)
915 {
916 bool mcast_to_ucast = dev->wireless_ap;
917 bool hairpin;
918
919 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
920 mcast_to_ucast = dev->settings.multicast_to_unicast;
921 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
922 !bridge->settings.multicast_to_unicast)
923 mcast_to_ucast = false;
924
925 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
926 if (dev->wireless_isolate)
927 hairpin = false;
928
929 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
930 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
931 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
932 }
933
934 int system_bridge_addif(struct device *bridge, struct device *dev)
935 {
936 char buf[64];
937 char *oldbr;
938 int tries = 0;
939 int ret;
940
941 retry:
942 ret = 0;
943 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
944 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
945 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
946 tries++;
947 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
948 dev->ifname, bridge->ifname, tries, strerror(errno));
949 if (tries <= 3)
950 goto retry;
951 }
952
953 if (dev->wireless)
954 system_bridge_set_wireless(bridge, dev);
955
956 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
957 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
958 system_bridge_set_multicast_router(dev, buf);
959 }
960
961 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
962 dev->settings.multicast_fast_leave)
963 system_bridge_set_multicast_fast_leave(dev, "1");
964
965 if (dev->settings.flags & DEV_OPT_LEARNING &&
966 !dev->settings.learning)
967 system_bridge_set_learning(dev, "0");
968
969 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
970 !dev->settings.unicast_flood)
971 system_bridge_set_unicast_flood(dev, "0");
972
973 if (dev->settings.flags & DEV_OPT_ISOLATE &&
974 dev->settings.isolate)
975 system_bridge_set_isolated(dev, "1");
976
977 if (dev->bpdu_filter)
978 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
979
980 return ret;
981 }
982
983 int system_bridge_delif(struct device *bridge, struct device *dev)
984 {
985 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
986 }
987
988 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
989 {
990 struct bridge_vlan_info vinfo = { .vid = vid, };
991 unsigned short flags = 0;
992 struct nlattr *afspec;
993 struct nl_msg *nlm;
994 int index;
995 int ret = 0;
996
997 index = if_nametoindex(iface);
998 if (!index)
999 return -1;
1000
1001 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1002 if (!nlm)
1003 return -1;
1004
1005 if (vflags & BRVLAN_F_SELF)
1006 flags |= BRIDGE_FLAGS_SELF;
1007
1008 if (vflags & BRVLAN_F_PVID)
1009 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1010
1011 if (vflags & BRVLAN_F_UNTAGGED)
1012 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1013
1014 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1015 if (!afspec) {
1016 ret = -ENOMEM;
1017 goto failure;
1018 }
1019
1020 if (flags)
1021 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1022
1023 if (vid_end > vid)
1024 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1025
1026 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1027
1028 if (vid_end > vid) {
1029 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1030 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1031 vinfo.vid = vid_end;
1032 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1033 }
1034
1035 nla_nest_end(nlm, afspec);
1036
1037 return system_rtnl_call(nlm);
1038
1039 failure:
1040 nlmsg_free(nlm);
1041 return ret;
1042 }
1043
1044 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1045 {
1046 const char *ifname = dev->ifname;
1047 struct blob_attr *cur;
1048 char op = cfg ? '+' : '-';
1049 char buf[64];
1050 size_t rem;
1051
1052 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1053 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1054 write_file(dev_buf, buf);
1055
1056 if (!cfg)
1057 return 0;
1058
1059 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1060
1061 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1062
1063 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1064 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1065 cfg->policy == BONDING_MODE_8023AD)
1066 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1067
1068 if (cfg->policy == BONDING_MODE_8023AD) {
1069 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1070 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1071 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1072 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1073 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1074 }
1075
1076 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1077 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1078
1079 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1080 cfg->policy == BONDING_MODE_BALANCE_ALB)
1081 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1082
1083 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1084 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1085 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1086 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1087 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1088 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1089
1090 system_set_dev_sysfs_int((cfg->monitor_arp ?
1091 "bonding/arp_interval" :
1092 "bonding/miimon"), ifname, cfg->monitor_interval);
1093
1094 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1095 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1096 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1097 }
1098
1099 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1100 if (cfg->policy < BONDING_MODE_8023AD)
1101 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1102 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1103 if (!cfg->monitor_arp && cfg->monitor_interval) {
1104 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1105 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1106 }
1107
1108 return 0;
1109 }
1110
1111 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1112 {
1113 const char *port_name = port->ifname;
1114 const char op_ch = add ? '+' : '-';
1115 char buf[IFNAMSIZ + 1];
1116
1117 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1118 system_if_down(port);
1119 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1120 system_if_up(port);
1121
1122 if (primary)
1123 system_set_dev_sysfs("bonding/primary", dev->ifname,
1124 add ? port_name : "");
1125
1126 return 0;
1127 }
1128
1129 int system_if_resolve(struct device *dev)
1130 {
1131 struct ifreq ifr;
1132
1133 memset(&ifr, 0, sizeof(ifr));
1134 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1135 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1136 return ifr.ifr_ifindex;
1137 else
1138 return 0;
1139 }
1140
1141 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1142 {
1143 struct ifreq ifr;
1144
1145 memset(&ifr, 0, sizeof(ifr));
1146 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1147 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1148 return -1;
1149
1150 ifr.ifr_flags |= add;
1151 ifr.ifr_flags &= ~rem;
1152 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1153 }
1154
1155 struct clear_data {
1156 struct nl_msg *msg;
1157 struct device *dev;
1158 int type;
1159 int size;
1160 int af;
1161 };
1162
1163
1164 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1165 {
1166 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1167
1168 return (long)ifa->ifa_index == ifindex;
1169 }
1170
1171 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1172 {
1173 struct rtmsg *r = NLMSG_DATA(hdr);
1174 struct nlattr *tb[__RTA_MAX];
1175
1176 if (r->rtm_protocol == RTPROT_KERNEL &&
1177 r->rtm_family == AF_INET6)
1178 return false;
1179
1180 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1181 if (!tb[RTA_OIF])
1182 return false;
1183
1184 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1185 }
1186
1187 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1188 {
1189 return true;
1190 }
1191
1192 static int cb_clear_event(struct nl_msg *msg, void *arg)
1193 {
1194 struct clear_data *clr = arg;
1195 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1196 bool (*cb)(struct nlmsghdr *, int ifindex);
1197 int type, ret;
1198
1199 switch(clr->type) {
1200 case RTM_GETADDR:
1201 type = RTM_DELADDR;
1202 if (hdr->nlmsg_type != RTM_NEWADDR)
1203 return NL_SKIP;
1204
1205 cb = check_ifaddr;
1206 break;
1207 case RTM_GETROUTE:
1208 type = RTM_DELROUTE;
1209 if (hdr->nlmsg_type != RTM_NEWROUTE)
1210 return NL_SKIP;
1211
1212 cb = check_route;
1213 break;
1214 case RTM_GETRULE:
1215 type = RTM_DELRULE;
1216 if (hdr->nlmsg_type != RTM_NEWRULE)
1217 return NL_SKIP;
1218
1219 cb = check_rule;
1220 break;
1221 default:
1222 return NL_SKIP;
1223 }
1224
1225 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1226 return NL_SKIP;
1227
1228 if (type == RTM_DELRULE)
1229 D(SYSTEM, "Remove a rule\n");
1230 else
1231 D(SYSTEM, "Remove %s from device %s\n",
1232 type == RTM_DELADDR ? "an address" : "a route",
1233 clr->dev->ifname);
1234
1235 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1236 hdr = nlmsg_hdr(clr->msg);
1237 hdr->nlmsg_type = type;
1238 hdr->nlmsg_flags = NLM_F_REQUEST;
1239
1240 nl_socket_disable_auto_ack(sock_rtnl);
1241 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1242 if (ret < 0) {
1243 if (type == RTM_DELRULE)
1244 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1245 else
1246 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1247 type == RTM_DELADDR ? "an address" : "a route",
1248 clr->dev->ifname, ret);
1249 }
1250
1251 nl_socket_enable_auto_ack(sock_rtnl);
1252
1253 return NL_SKIP;
1254 }
1255
1256 static int
1257 cb_finish_event(struct nl_msg *msg, void *arg)
1258 {
1259 int *pending = arg;
1260 *pending = 0;
1261 return NL_STOP;
1262 }
1263
1264 static int
1265 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1266 {
1267 int *pending = arg;
1268 *pending = err->error;
1269 return NL_STOP;
1270 }
1271
1272 static void
1273 system_if_clear_entries(struct device *dev, int type, int af)
1274 {
1275 struct clear_data clr;
1276 struct nl_cb *cb;
1277 struct rtmsg rtm = {
1278 .rtm_family = af,
1279 .rtm_flags = RTM_F_CLONED,
1280 };
1281 int flags = NLM_F_DUMP;
1282 int pending = 1;
1283
1284 clr.af = af;
1285 clr.dev = dev;
1286 clr.type = type;
1287 switch (type) {
1288 case RTM_GETADDR:
1289 case RTM_GETRULE:
1290 clr.size = sizeof(struct rtgenmsg);
1291 break;
1292 case RTM_GETROUTE:
1293 clr.size = sizeof(struct rtmsg);
1294 break;
1295 default:
1296 return;
1297 }
1298
1299 cb = nl_cb_alloc(NL_CB_DEFAULT);
1300 if (!cb)
1301 return;
1302
1303 clr.msg = nlmsg_alloc_simple(type, flags);
1304 if (!clr.msg)
1305 goto out;
1306
1307 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1308 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1309 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1310 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1311
1312 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1313 goto free;
1314
1315 while (pending > 0)
1316 nl_recvmsgs(sock_rtnl, cb);
1317
1318 free:
1319 nlmsg_free(clr.msg);
1320 out:
1321 nl_cb_put(cb);
1322 }
1323
1324 /*
1325 * Clear bridge (membership) state and bring down device
1326 */
1327 void system_if_clear_state(struct device *dev)
1328 {
1329 static char buf[256];
1330 char *bridge;
1331 device_set_ifindex(dev, system_if_resolve(dev));
1332
1333 if (dev->external || !dev->ifindex)
1334 return;
1335
1336 system_if_flags(dev->ifname, 0, IFF_UP);
1337
1338 if (system_is_bridge(dev->ifname)) {
1339 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1340 system_bridge_delbr(dev);
1341 return;
1342 }
1343
1344 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1345 if (bridge) {
1346 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1347 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1348 }
1349
1350 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1351 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1352 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1353 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1354 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1355 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1356 system_set_disable_ipv6(dev, "0");
1357 }
1358
1359 static inline unsigned long
1360 sec_to_jiffies(int val)
1361 {
1362 return (unsigned long) val * 100;
1363 }
1364
1365 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1366 {
1367 struct nlattr *linkinfo, *data;
1368 struct nl_msg *msg;
1369 uint64_t val;
1370 int rv;
1371
1372 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1373 if (!msg)
1374 return -1;
1375
1376 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1377 goto nla_put_failure;
1378
1379 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1380
1381 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1382 goto nla_put_failure;
1383
1384 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1385 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1386 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1387 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1388 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1389
1390 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1391 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1392
1393 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1394 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1395 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1396 }
1397
1398 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1399 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1400
1401 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1402 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1403
1404 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1405 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1406
1407 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1408 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1409 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1410 val = cfg->robustness * cfg->query_interval +
1411 cfg->query_response_interval;
1412
1413 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1414
1415 val -= cfg->query_response_interval / 2;
1416
1417 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1418 }
1419
1420 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1421 val = cfg->query_interval / 4;
1422
1423 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1424 }
1425
1426 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1427 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1428 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1429 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1430
1431 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1432 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1433
1434 nla_nest_end(msg, data);
1435 nla_nest_end(msg, linkinfo);
1436
1437 rv = system_rtnl_call(msg);
1438 if (rv)
1439 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1440
1441 return rv;
1442
1443 nla_put_failure:
1444 nlmsg_free(msg);
1445 return -ENOMEM;
1446 }
1447
1448 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1449 {
1450 struct nl_msg *msg;
1451 struct nlattr *linkinfo, *data;
1452 size_t i;
1453 int rv;
1454 static const struct {
1455 const char *name;
1456 enum macvlan_mode val;
1457 } modes[] = {
1458 { "private", MACVLAN_MODE_PRIVATE },
1459 { "vepa", MACVLAN_MODE_VEPA },
1460 { "bridge", MACVLAN_MODE_BRIDGE },
1461 { "passthru", MACVLAN_MODE_PASSTHRU },
1462 };
1463
1464 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1465 if (!msg)
1466 return -1;
1467
1468 if (cfg->flags & MACVLAN_OPT_MACADDR)
1469 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1470 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1471
1472 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1473 goto nla_put_failure;
1474
1475 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1476
1477 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1478 goto nla_put_failure;
1479
1480 if (cfg->mode) {
1481 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1482 if (strcmp(cfg->mode, modes[i].name) != 0)
1483 continue;
1484
1485 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1486 break;
1487 }
1488 }
1489
1490 nla_nest_end(msg, data);
1491 nla_nest_end(msg, linkinfo);
1492
1493 rv = system_rtnl_call(msg);
1494 if (rv)
1495 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1496
1497 return rv;
1498
1499 nla_put_failure:
1500 nlmsg_free(msg);
1501 return -ENOMEM;
1502 }
1503
1504 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1505 {
1506 struct nl_msg *msg;
1507 int index;
1508
1509 if (!dev)
1510 return -1;
1511
1512 index = system_if_resolve(dev);
1513 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1514 if (!msg)
1515 return -1;
1516
1517 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1518 return system_rtnl_call(msg);
1519 }
1520
1521 int system_macvlan_del(struct device *macvlan)
1522 {
1523 return system_link_del(macvlan->ifname);
1524 }
1525
1526 int system_netns_open(const pid_t target_ns)
1527 {
1528 char pid_net_path[PATH_MAX];
1529
1530 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1531
1532 return open(pid_net_path, O_RDONLY);
1533 }
1534
1535 int system_netns_set(int netns_fd)
1536 {
1537 return setns(netns_fd, CLONE_NEWNET);
1538 }
1539
1540 int system_veth_add(struct device *veth, struct veth_config *cfg)
1541 {
1542 struct nl_msg *msg;
1543 struct ifinfomsg empty_iim = {0,};
1544 struct nlattr *linkinfo, *data, *veth_info;
1545 int rv;
1546
1547 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1548
1549 if (!msg)
1550 return -1;
1551
1552 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1553
1554 if (cfg->flags & VETH_OPT_MACADDR)
1555 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1556 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1557
1558 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1559 goto nla_put_failure;
1560
1561 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1562
1563 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1564 goto nla_put_failure;
1565
1566 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1567 goto nla_put_failure;
1568
1569 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1570
1571 if (cfg->flags & VETH_OPT_PEER_NAME)
1572 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1573 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1574 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1575
1576 nla_nest_end(msg, veth_info);
1577 nla_nest_end(msg, data);
1578 nla_nest_end(msg, linkinfo);
1579
1580 rv = system_rtnl_call(msg);
1581 if (rv) {
1582 if (cfg->flags & VETH_OPT_PEER_NAME)
1583 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1584 else
1585 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1586 }
1587
1588 return rv;
1589
1590 nla_put_failure:
1591 nlmsg_free(msg);
1592 return -ENOMEM;
1593 }
1594
1595 int system_veth_del(struct device *veth)
1596 {
1597 return system_link_del(veth->ifname);
1598 }
1599
1600 static int system_vlan(struct device *dev, int id)
1601 {
1602 struct vlan_ioctl_args ifr = {
1603 .cmd = SET_VLAN_NAME_TYPE_CMD,
1604 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1605 };
1606
1607 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1608 return -1;
1609
1610 if (id < 0) {
1611 ifr.cmd = DEL_VLAN_CMD;
1612 ifr.u.VID = 0;
1613 } else {
1614 ifr.cmd = ADD_VLAN_CMD;
1615 ifr.u.VID = id;
1616 }
1617 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1618 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1619 }
1620
1621 int system_vlan_add(struct device *dev, int id)
1622 {
1623 return system_vlan(dev, id);
1624 }
1625
1626 int system_vlan_del(struct device *dev)
1627 {
1628 return system_vlan(dev, -1);
1629 }
1630
1631 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1632 {
1633 struct nl_msg *msg;
1634 struct nlattr *linkinfo, *data, *qos;
1635 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1636 struct vlan_qos_mapping *elem;
1637 struct ifla_vlan_qos_mapping nl_qos_map;
1638 int rv;
1639
1640 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1641
1642 if (!msg)
1643 return -1;
1644
1645 nlmsg_append(msg, &iim, sizeof(iim), 0);
1646 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1647 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1648
1649 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1650 goto nla_put_failure;
1651
1652 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1653
1654 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1655 goto nla_put_failure;
1656
1657 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1658
1659 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1660 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1661 #else
1662 if(cfg->proto == VLAN_PROTO_8021AD)
1663 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);
1664 #endif
1665
1666 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1667 goto nla_put_failure;
1668
1669 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1670 nl_qos_map.from = elem->from;
1671 nl_qos_map.to = elem->to;
1672 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1673 }
1674 nla_nest_end(msg, qos);
1675
1676 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1677 goto nla_put_failure;
1678
1679 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1680 nl_qos_map.from = elem->from;
1681 nl_qos_map.to = elem->to;
1682 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1683 }
1684 nla_nest_end(msg, qos);
1685
1686 nla_nest_end(msg, data);
1687 nla_nest_end(msg, linkinfo);
1688
1689 rv = system_rtnl_call(msg);
1690 if (rv)
1691 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1692
1693 return rv;
1694
1695 nla_put_failure:
1696 nlmsg_free(msg);
1697 return -ENOMEM;
1698 }
1699
1700 int system_vlandev_del(struct device *vlandev)
1701 {
1702 return system_link_del(vlandev->ifname);
1703 }
1704
1705 static void
1706 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1707 {
1708 struct ethtool_cmd ecmd = {
1709 .cmd = ETHTOOL_GSET,
1710 };
1711 struct ifreq ifr = {
1712 .ifr_data = (caddr_t)&ecmd,
1713 };
1714 static const struct {
1715 unsigned int speed;
1716 uint8_t bit_half;
1717 uint8_t bit_full;
1718 } speed_mask[] = {
1719 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1720 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1721 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1722 };
1723 uint32_t adv;
1724 size_t i;
1725
1726 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1727
1728 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1729 return;
1730
1731 adv = ecmd.supported;
1732 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1733 if (s->flags & DEV_OPT_DUPLEX) {
1734 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1735 adv &= ~(1 << bit);
1736 }
1737
1738 if (!(s->flags & DEV_OPT_SPEED) ||
1739 s->speed == speed_mask[i].speed)
1740 continue;
1741
1742 adv &= ~(1 << speed_mask[i].bit_full);
1743 adv &= ~(1 << speed_mask[i].bit_half);
1744 }
1745
1746
1747 if (ecmd.autoneg && ecmd.advertising == adv)
1748 return;
1749
1750 ecmd.autoneg = 1;
1751 ecmd.advertising = adv;
1752 ecmd.cmd = ETHTOOL_SSET;
1753 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1754 }
1755
1756 void
1757 system_if_get_settings(struct device *dev, struct device_settings *s)
1758 {
1759 struct ifreq ifr;
1760 char buf[10];
1761
1762 memset(&ifr, 0, sizeof(ifr));
1763 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1764
1765 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1766 s->mtu = ifr.ifr_mtu;
1767 s->flags |= DEV_OPT_MTU;
1768 }
1769
1770 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1771 if (s->mtu6 > 0)
1772 s->flags |= DEV_OPT_MTU6;
1773
1774 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1775 s->txqueuelen = ifr.ifr_qlen;
1776 s->flags |= DEV_OPT_TXQUEUELEN;
1777 }
1778
1779 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1780 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1781 s->flags |= DEV_OPT_MACADDR;
1782 }
1783
1784 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1785 s->ipv6 = !strtoul(buf, NULL, 0);
1786 s->flags |= DEV_OPT_IPV6;
1787 }
1788
1789 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1790 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1791 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1792 }
1793
1794 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1795 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1796 s->flags |= DEV_OPT_PROMISC;
1797
1798 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1799 s->flags |= DEV_OPT_MULTICAST;
1800 }
1801
1802 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1803 s->rpfilter = strtoul(buf, NULL, 0);
1804 s->flags |= DEV_OPT_RPFILTER;
1805 }
1806
1807 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1808 s->acceptlocal = strtoul(buf, NULL, 0);
1809 s->flags |= DEV_OPT_ACCEPTLOCAL;
1810 }
1811
1812 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1813 s->igmpversion = strtoul(buf, NULL, 0);
1814 s->flags |= DEV_OPT_IGMPVERSION;
1815 }
1816
1817 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1818 s->mldversion = strtoul(buf, NULL, 0);
1819 s->flags |= DEV_OPT_MLDVERSION;
1820 }
1821
1822 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1823 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1824 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1825 }
1826
1827 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1828 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1829 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1830 }
1831
1832 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1833 s->neigh4locktime = strtol(buf, NULL, 0);
1834 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1835 }
1836
1837 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1838 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1839 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1840 }
1841
1842 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1843 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1844 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1845 }
1846
1847 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1848 s->dadtransmits = strtoul(buf, NULL, 0);
1849 s->flags |= DEV_OPT_DADTRANSMITS;
1850 }
1851
1852 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1853 s->sendredirects = strtoul(buf, NULL, 0);
1854 s->flags |= DEV_OPT_SENDREDIRECTS;
1855 }
1856
1857 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1858 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1859 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1860 }
1861
1862 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1863 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1864 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1865 }
1866
1867 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1868 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1869 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1870 }
1871
1872 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1873 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1874 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1875 }
1876
1877 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1878 s->arp_accept = strtoul(buf, NULL, 0);
1879 s->flags |= DEV_OPT_ARP_ACCEPT;
1880 }
1881 }
1882
1883 void
1884 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1885 {
1886 struct ifreq ifr;
1887 char buf[12];
1888
1889 apply_mask &= s->flags;
1890
1891 memset(&ifr, 0, sizeof(ifr));
1892 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1893 if (apply_mask & DEV_OPT_MTU) {
1894 ifr.ifr_mtu = s->mtu;
1895 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1896 s->flags &= ~DEV_OPT_MTU;
1897 }
1898 if (apply_mask & DEV_OPT_MTU6) {
1899 system_update_ipv6_mtu(dev, s->mtu6);
1900 }
1901 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1902 ifr.ifr_qlen = s->txqueuelen;
1903 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1904 s->flags &= ~DEV_OPT_TXQUEUELEN;
1905 }
1906 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1907 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1908 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1909 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1910 s->flags &= ~DEV_OPT_MACADDR;
1911 }
1912 if (apply_mask & DEV_OPT_IPV6)
1913 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1914 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1915 struct device dummy = {
1916 .ifname = "all",
1917 };
1918 bool ip6segmentrouting = device_check_ip6segmentrouting();
1919
1920 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1921 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1922 }
1923 if (apply_mask & DEV_OPT_PROMISC) {
1924 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1925 !s->promisc ? IFF_PROMISC : 0) < 0)
1926 s->flags &= ~DEV_OPT_PROMISC;
1927 }
1928 if (apply_mask & DEV_OPT_RPFILTER) {
1929 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1930 system_set_rpfilter(dev, buf);
1931 }
1932 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1933 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1934 if (apply_mask & DEV_OPT_IGMPVERSION) {
1935 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1936 system_set_igmpversion(dev, buf);
1937 }
1938 if (apply_mask & DEV_OPT_MLDVERSION) {
1939 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1940 system_set_mldversion(dev, buf);
1941 }
1942 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1943 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1944 system_set_neigh4reachabletime(dev, buf);
1945 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1946 system_set_neigh6reachabletime(dev, buf);
1947 }
1948 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1949 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1950 system_set_neigh4locktime(dev, buf);
1951 }
1952 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1953 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1954 system_set_neigh4gcstaletime(dev, buf);
1955 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1956 system_set_neigh6gcstaletime(dev, buf);
1957 }
1958 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1959 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1960 system_set_dadtransmits(dev, buf);
1961 }
1962 if (apply_mask & DEV_OPT_MULTICAST) {
1963 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1964 !s->multicast ? IFF_MULTICAST : 0) < 0)
1965 s->flags &= ~DEV_OPT_MULTICAST;
1966 }
1967 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1968 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1969 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1970 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1971 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1972 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1973 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1974 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1975 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1976 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1977 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1978 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1979 system_set_ethtool_settings(dev, s);
1980 }
1981
1982 int system_if_up(struct device *dev)
1983 {
1984 return system_if_flags(dev->ifname, IFF_UP, 0);
1985 }
1986
1987 int system_if_down(struct device *dev)
1988 {
1989 return system_if_flags(dev->ifname, 0, IFF_UP);
1990 }
1991
1992 struct if_check_data {
1993 struct device *dev;
1994 int pending;
1995 int ret;
1996 };
1997
1998 #ifndef IFF_LOWER_UP
1999 #define IFF_LOWER_UP 0x10000
2000 #endif
2001
2002 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2003 {
2004 struct nlmsghdr *nh = nlmsg_hdr(msg);
2005 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2006 struct if_check_data *chk = (struct if_check_data *)arg;
2007
2008 if (nh->nlmsg_type != RTM_NEWLINK)
2009 return NL_SKIP;
2010
2011 if (chk->dev->type == &simple_device_type)
2012 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
2013 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
2014
2015 return NL_OK;
2016 }
2017
2018 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2019 {
2020 struct if_check_data *chk = (struct if_check_data *)arg;
2021 chk->pending = 0;
2022 return NL_STOP;
2023 }
2024
2025 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2026 {
2027 struct if_check_data *chk = (struct if_check_data *)arg;
2028
2029 if (chk->dev->type == &simple_device_type)
2030 device_set_present(chk->dev, false);
2031 device_set_link(chk->dev, false);
2032 chk->pending = err->error;
2033
2034 return NL_STOP;
2035 }
2036
2037 struct bridge_vlan_check_data {
2038 struct device *check_dev;
2039 int ifindex;
2040 int ret;
2041 bool pending;
2042 };
2043
2044 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2045 struct bridge_vlan_port *port,
2046 struct bridge_vlan_info *vinfo)
2047 {
2048 uint16_t flags = 0, diff, mask;
2049
2050 if (port->flags & BRVLAN_F_PVID)
2051 flags |= BRIDGE_VLAN_INFO_PVID;
2052 if (port->flags & BRVLAN_F_UNTAGGED)
2053 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2054
2055 diff = vinfo->flags ^ flags;
2056 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2057 if (diff & mask) {
2058 data->ret = 1;
2059 data->pending = false;
2060 }
2061
2062 port->check = 1;
2063 }
2064
2065 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2066 struct rtattr *attr)
2067 {
2068 struct bridge_vlan_hotplug_port *port;
2069 struct bridge_vlan_info *vinfo;
2070 struct bridge_vlan *vlan;
2071 struct rtattr *cur;
2072 int rem = RTA_PAYLOAD(attr);
2073 int i;
2074
2075 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2076 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2077 continue;
2078
2079 vinfo = RTA_DATA(cur);
2080 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2081 if (!vlan) {
2082 data->ret = 1;
2083 data->pending = false;
2084 return;
2085 }
2086
2087 for (i = 0; i < vlan->n_ports; i++)
2088 if (!vlan->ports[i].check)
2089 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2090
2091 list_for_each_entry(port, &vlan->hotplug_ports, list)
2092 if (!port->port.check)
2093 bridge_vlan_check_port(data, &port->port, vinfo);
2094 }
2095 }
2096
2097 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2098 {
2099 struct bridge_vlan_check_data *data = arg;
2100 struct nlmsghdr *nh = nlmsg_hdr(msg);
2101 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2102 struct rtattr *attr;
2103 int rem;
2104
2105 if (nh->nlmsg_type != RTM_NEWLINK)
2106 return NL_SKIP;
2107
2108 if (ifi->ifi_family != AF_BRIDGE)
2109 return NL_SKIP;
2110
2111 if (ifi->ifi_index != data->ifindex)
2112 return NL_SKIP;
2113
2114 attr = IFLA_RTA(ifi);
2115 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2116 while (RTA_OK(attr, rem)) {
2117 if (attr->rta_type == IFLA_AF_SPEC)
2118 bridge_vlan_check_attr(data, attr);
2119
2120 attr = RTA_NEXT(attr, rem);
2121 }
2122
2123 return NL_SKIP;
2124 }
2125
2126 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2127 {
2128 struct bridge_vlan_check_data *data = arg;
2129 data->pending = false;
2130 return NL_STOP;
2131 }
2132
2133 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2134 {
2135 struct bridge_vlan_check_data *data = arg;
2136 data->pending = false;
2137 return NL_STOP;
2138 }
2139
2140 int system_bridge_vlan_check(struct device *dev, char *ifname)
2141 {
2142 struct bridge_vlan_check_data data = {
2143 .check_dev = dev,
2144 .ifindex = if_nametoindex(ifname),
2145 .ret = -1,
2146 .pending = true,
2147 };
2148 static struct ifinfomsg ifi = {
2149 .ifi_family = AF_BRIDGE
2150 };
2151 static struct rtattr ext_req = {
2152 .rta_type = IFLA_EXT_MASK,
2153 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2154 };
2155 uint32_t filter = RTEXT_FILTER_BRVLAN;
2156 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2157 struct bridge_vlan *vlan;
2158 struct nl_msg *msg;
2159 int i;
2160
2161 if (!data.ifindex)
2162 return 0;
2163
2164 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2165
2166 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2167 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2168 nlmsg_append(msg, &filter, sizeof(filter), 0))
2169 goto free;
2170
2171 vlist_for_each_element(&dev->vlans, vlan, node) {
2172 struct bridge_vlan_hotplug_port *port;
2173
2174 for (i = 0; i < vlan->n_ports; i++) {
2175 if (!strcmp(vlan->ports[i].ifname, ifname))
2176 vlan->ports[i].check = 0;
2177 else
2178 vlan->ports[i].check = -1;
2179 }
2180
2181 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2182 if (!strcmp(port->port.ifname, ifname))
2183 port->port.check = 0;
2184 else
2185 port->port.check = -1;
2186 }
2187 }
2188
2189 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2190 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2191 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2192 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2193
2194 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2195 goto free;
2196
2197 data.ret = 0;
2198 while (data.pending)
2199 nl_recvmsgs(sock_rtnl, cb);
2200
2201 vlist_for_each_element(&dev->vlans, vlan, node) {
2202 struct bridge_vlan_hotplug_port *port;
2203
2204 for (i = 0; i < vlan->n_ports; i++) {
2205 if (!vlan->ports[i].check) {
2206 data.ret = 1;
2207 break;
2208 }
2209 }
2210
2211 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2212 if (!port->port.check) {
2213 data.ret = 1;
2214 break;
2215 }
2216 }
2217 }
2218
2219 free:
2220 nlmsg_free(msg);
2221 nl_cb_put(cb);
2222 return data.ret;
2223 }
2224
2225 int system_if_check(struct device *dev)
2226 {
2227 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2228 struct nl_msg *msg;
2229 struct ifinfomsg ifi = {
2230 .ifi_family = AF_UNSPEC,
2231 .ifi_index = 0,
2232 };
2233 struct if_check_data chk = {
2234 .dev = dev,
2235 .pending = 1,
2236 };
2237 int ret = 1;
2238
2239 if (!cb)
2240 return ret;
2241
2242 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2243 if (!msg)
2244 goto out;
2245
2246 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2247 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2248 goto free;
2249
2250 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2251 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2252 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2253
2254 ret = nl_send_auto_complete(sock_rtnl, msg);
2255 if (ret < 0)
2256 goto free;
2257
2258 while (chk.pending > 0)
2259 nl_recvmsgs(sock_rtnl, cb);
2260
2261 ret = chk.pending;
2262
2263 free:
2264 nlmsg_free(msg);
2265 out:
2266 nl_cb_put(cb);
2267 return ret;
2268 }
2269
2270 struct device *
2271 system_if_get_parent(struct device *dev)
2272 {
2273 char buf[64], *devname;
2274 int ifindex, iflink;
2275
2276 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2277 return NULL;
2278
2279 iflink = strtoul(buf, NULL, 0);
2280 ifindex = system_if_resolve(dev);
2281 if (!iflink || iflink == ifindex)
2282 return NULL;
2283
2284 devname = if_indextoname(iflink, buf);
2285 if (!devname)
2286 return NULL;
2287
2288 return device_get(devname, true);
2289 }
2290
2291 static bool
2292 read_string_file(int dir_fd, const char *file, char *buf, int len)
2293 {
2294 bool ret = false;
2295 char *c;
2296 int fd;
2297
2298 fd = openat(dir_fd, file, O_RDONLY);
2299 if (fd < 0)
2300 return false;
2301
2302 retry:
2303 len = read(fd, buf, len - 1);
2304 if (len < 0) {
2305 if (errno == EINTR)
2306 goto retry;
2307 } else if (len > 0) {
2308 buf[len] = 0;
2309
2310 c = strchr(buf, '\n');
2311 if (c)
2312 *c = 0;
2313
2314 ret = true;
2315 }
2316
2317 close(fd);
2318
2319 return ret;
2320 }
2321
2322 static bool
2323 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2324 {
2325 char buf[64];
2326 bool ret = false;
2327
2328 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2329 if (ret)
2330 *val = strtoull(buf, NULL, 0);
2331
2332 return ret;
2333 }
2334
2335 /* Assume advertised flags == supported flags */
2336 static const struct {
2337 uint32_t mask;
2338 const char *name;
2339 } ethtool_link_modes[] = {
2340 { ADVERTISED_10baseT_Half, "10baseT-H" },
2341 { ADVERTISED_10baseT_Full, "10baseT-F" },
2342 { ADVERTISED_100baseT_Half, "100baseT-H" },
2343 { ADVERTISED_100baseT_Full, "100baseT-F" },
2344 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2345 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2346 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2347 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2348 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2349 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2350 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2351 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2352 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2353 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2354 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2355 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2356 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2357 #ifdef ADVERTISED_56000baseKR4_Full
2358 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2359 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2360 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2361 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2362 #endif
2363 };
2364
2365 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2366 {
2367 size_t i;
2368 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2369 if (mask & ethtool_link_modes[i].mask)
2370 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2371 }
2372 }
2373
2374 bool
2375 system_if_force_external(const char *ifname)
2376 {
2377 struct stat s;
2378
2379 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2380 }
2381
2382 static const char *
2383 system_netdevtype_name(unsigned short dev_type)
2384 {
2385 size_t i;
2386
2387 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2388 if (netdev_types[i].id == dev_type)
2389 return netdev_types[i].name;
2390 }
2391
2392 /* the last key is used by default */
2393 i = ARRAY_SIZE(netdev_types) - 1;
2394
2395 return netdev_types[i].name;
2396 }
2397
2398 static void
2399 system_add_devtype(struct blob_buf *b, const char *ifname)
2400 {
2401 char buf[100];
2402 bool found = false;
2403
2404 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2405 const char *info = "DEVTYPE=";
2406 char *context = NULL;
2407 const char *line = strtok_r(buf, "\r\n", &context);
2408
2409 while (line != NULL) {
2410 char *index = strstr(line, info);
2411
2412 if (index != NULL) {
2413 blobmsg_add_string(b, "devtype", index + strlen(info));
2414 found = true;
2415 break;
2416 }
2417
2418 line = strtok_r(NULL, "\r\n", &context);
2419 }
2420 }
2421
2422 if (!found) {
2423 unsigned short number = 0;
2424 const char *name = NULL;
2425
2426 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2427 number = strtoul(buf, NULL, 0);
2428 name = system_netdevtype_name(number);
2429 blobmsg_add_string(b, "devtype", name);
2430 }
2431 }
2432 }
2433
2434 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2435
2436 static int32_t
2437 ethtool_feature_count(const char *ifname)
2438 {
2439 struct {
2440 struct ethtool_sset_info hdr;
2441 uint32_t buf;
2442 } req = {
2443 .hdr = {
2444 .cmd = ETHTOOL_GSSET_INFO,
2445 .sset_mask = 1 << ETH_SS_FEATURES
2446 }
2447 };
2448
2449 struct ifreq ifr = {
2450 .ifr_data = (void *)&req
2451 };
2452
2453 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2454
2455 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2456 return -1;
2457
2458 if (!req.hdr.sset_mask)
2459 return 0;
2460
2461 return req.buf;
2462 }
2463
2464 static int32_t
2465 ethtool_feature_index(const char *ifname, const char *keyname)
2466 {
2467 struct ethtool_gstrings *feature_names;
2468 struct ifreq ifr = { 0 };
2469 int32_t n_features;
2470 uint32_t i;
2471
2472 n_features = ethtool_feature_count(ifname);
2473
2474 if (n_features <= 0)
2475 return -1;
2476
2477 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2478
2479 if (!feature_names)
2480 return -1;
2481
2482 feature_names->cmd = ETHTOOL_GSTRINGS;
2483 feature_names->string_set = ETH_SS_FEATURES;
2484 feature_names->len = n_features;
2485
2486 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2487 ifr.ifr_data = (void *)feature_names;
2488
2489 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2490 free(feature_names);
2491
2492 return -1;
2493 }
2494
2495 for (i = 0; i < feature_names->len; i++)
2496 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2497 break;
2498
2499 if (i >= feature_names->len)
2500 i = -1;
2501
2502 free(feature_names);
2503
2504 return i;
2505 }
2506
2507 static bool
2508 ethtool_feature_value(const char *ifname, const char *keyname)
2509 {
2510 struct ethtool_get_features_block *feature_block;
2511 struct ethtool_gfeatures *feature_values;
2512 struct ifreq ifr = { 0 };
2513 int32_t feature_idx;
2514 bool active;
2515
2516 feature_idx = ethtool_feature_index(ifname, keyname);
2517
2518 if (feature_idx < 0)
2519 return false;
2520
2521 feature_values = calloc(1,
2522 sizeof(*feature_values) +
2523 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2524
2525 if (!feature_values)
2526 return false;
2527
2528 feature_values->cmd = ETHTOOL_GFEATURES;
2529 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2530
2531 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2532 ifr.ifr_data = (void *)feature_values;
2533
2534 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2535 free(feature_values);
2536
2537 return false;
2538 }
2539
2540 feature_block = &feature_values->features[feature_idx / 32];
2541 active = feature_block->active & (1U << feature_idx % 32);
2542
2543 free(feature_values);
2544
2545 return active;
2546 }
2547
2548 int
2549 system_if_dump_info(struct device *dev, struct blob_buf *b)
2550 {
2551 struct ethtool_cmd ecmd;
2552 struct ifreq ifr;
2553 char *s;
2554 void *c;
2555
2556 memset(&ecmd, 0, sizeof(ecmd));
2557 memset(&ifr, 0, sizeof(ifr));
2558 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2559 ifr.ifr_data = (caddr_t) &ecmd;
2560 ecmd.cmd = ETHTOOL_GSET;
2561
2562 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2563 c = blobmsg_open_array(b, "link-advertising");
2564 system_add_link_modes(b, ecmd.advertising);
2565 blobmsg_close_array(b, c);
2566
2567 c = blobmsg_open_array(b, "link-partner-advertising");
2568 system_add_link_modes(b, ecmd.lp_advertising);
2569 blobmsg_close_array(b, c);
2570
2571 c = blobmsg_open_array(b, "link-supported");
2572 system_add_link_modes(b, ecmd.supported);
2573 blobmsg_close_array(b, c);
2574
2575 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2576 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2577 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2578 blobmsg_add_string_buffer(b);
2579
2580 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2581 }
2582
2583 blobmsg_add_u8(b, "hw-tc-offload",
2584 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
2585
2586 system_add_devtype(b, dev->ifname);
2587
2588 return 0;
2589 }
2590
2591 int
2592 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2593 {
2594 const char *const counters[] = {
2595 "collisions", "rx_frame_errors", "tx_compressed",
2596 "multicast", "rx_length_errors", "tx_dropped",
2597 "rx_bytes", "rx_missed_errors", "tx_errors",
2598 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2599 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2600 "rx_dropped", "tx_aborted_errors", "tx_packets",
2601 "rx_errors", "tx_bytes", "tx_window_errors",
2602 "rx_fifo_errors", "tx_carrier_errors",
2603 };
2604 int stats_dir;
2605 size_t i;
2606 uint64_t val = 0;
2607
2608 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2609 if (stats_dir < 0)
2610 return -1;
2611
2612 for (i = 0; i < ARRAY_SIZE(counters); i++)
2613 if (read_uint64_file(stats_dir, counters[i], &val))
2614 blobmsg_add_u64(b, counters[i], val);
2615
2616 close(stats_dir);
2617 return 0;
2618 }
2619
2620 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2621 {
2622 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2623 int alen = v4 ? 4 : 16;
2624 unsigned int flags = 0;
2625 struct ifaddrmsg ifa = {
2626 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2627 .ifa_prefixlen = addr->mask,
2628 .ifa_index = dev->ifindex,
2629 };
2630
2631 struct nl_msg *msg;
2632 if (cmd == RTM_NEWADDR)
2633 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2634
2635 msg = nlmsg_alloc_simple(cmd, flags);
2636 if (!msg)
2637 return -1;
2638
2639 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2640 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2641 if (v4) {
2642 if (addr->broadcast)
2643 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2644 if (addr->point_to_point)
2645 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2646 } else {
2647 time_t now = system_get_rtime();
2648 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2649
2650 if (addr->preferred_until) {
2651 int64_t preferred = addr->preferred_until - now;
2652 if (preferred < 0)
2653 preferred = 0;
2654 else if (preferred > UINT32_MAX)
2655 preferred = UINT32_MAX;
2656
2657 cinfo.ifa_prefered = preferred;
2658 }
2659
2660 if (addr->valid_until) {
2661 int64_t valid = addr->valid_until - now;
2662 if (valid <= 0) {
2663 nlmsg_free(msg);
2664 return -1;
2665 }
2666 else if (valid > UINT32_MAX)
2667 valid = UINT32_MAX;
2668
2669 cinfo.ifa_valid = valid;
2670 }
2671
2672 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2673
2674 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2675 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2676 }
2677
2678 return system_rtnl_call(msg);
2679 }
2680
2681 int system_add_address(struct device *dev, struct device_addr *addr)
2682 {
2683 return system_addr(dev, addr, RTM_NEWADDR);
2684 }
2685
2686 int system_del_address(struct device *dev, struct device_addr *addr)
2687 {
2688 return system_addr(dev, addr, RTM_DELADDR);
2689 }
2690
2691 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2692 {
2693 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2694 unsigned int flags = 0;
2695 struct ndmsg ndm = {
2696 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2697 .ndm_ifindex = dev->ifindex,
2698 .ndm_state = NUD_PERMANENT,
2699 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2700 };
2701 struct nl_msg *msg;
2702
2703 if (cmd == RTM_NEWNEIGH)
2704 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2705
2706 msg = nlmsg_alloc_simple(cmd, flags);
2707
2708 if (!msg)
2709 return -1;
2710
2711 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2712
2713 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2714 if (neighbor->flags & DEVNEIGH_MAC)
2715 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2716
2717
2718 return system_rtnl_call(msg);
2719 }
2720
2721 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2722 {
2723 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2724 }
2725
2726 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2727 {
2728 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2729 }
2730
2731 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2732 {
2733 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2734 bool have_gw;
2735 unsigned int flags = 0;
2736
2737 if (alen == 4)
2738 have_gw = !!route->nexthop.in.s_addr;
2739 else
2740 have_gw = route->nexthop.in6.s6_addr32[0] ||
2741 route->nexthop.in6.s6_addr32[1] ||
2742 route->nexthop.in6.s6_addr32[2] ||
2743 route->nexthop.in6.s6_addr32[3];
2744
2745 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2746 ? route->table : RT_TABLE_MAIN;
2747
2748 struct rtmsg rtm = {
2749 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2750 .rtm_dst_len = route->mask,
2751 .rtm_src_len = route->sourcemask,
2752 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2753 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2754 .rtm_scope = RT_SCOPE_NOWHERE,
2755 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2756 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2757 };
2758 struct nl_msg *msg;
2759
2760 if (cmd == RTM_NEWROUTE) {
2761 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2762
2763 if (!dev) { /* Add null-route */
2764 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2765 rtm.rtm_type = RTN_UNREACHABLE;
2766 }
2767 else
2768 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2769 }
2770
2771 if (route->flags & DEVROUTE_TYPE) {
2772 rtm.rtm_type = route->type;
2773 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2774 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2775 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2776 rtm.rtm_table = RT_TABLE_LOCAL;
2777 }
2778
2779 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2780 rtm.rtm_scope = RT_SCOPE_HOST;
2781 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2782 rtm.rtm_type == RTN_ANYCAST) {
2783 rtm.rtm_scope = RT_SCOPE_LINK;
2784 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2785 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2786 rtm.rtm_type == RTN_THROW) {
2787 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2788 dev = NULL;
2789 }
2790 }
2791
2792 msg = nlmsg_alloc_simple(cmd, flags);
2793 if (!msg)
2794 return -1;
2795
2796 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2797
2798 if (route->mask)
2799 nla_put(msg, RTA_DST, alen, &route->addr);
2800
2801 if (route->sourcemask) {
2802 if (rtm.rtm_family == AF_INET)
2803 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2804 else
2805 nla_put(msg, RTA_SRC, alen, &route->source);
2806 }
2807
2808 if (route->metric > 0)
2809 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2810
2811 if (have_gw)
2812 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2813
2814 if (dev)
2815 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2816
2817 if (table >= 256)
2818 nla_put_u32(msg, RTA_TABLE, table);
2819
2820 if (route->flags & DEVROUTE_MTU) {
2821 struct nlattr *metrics;
2822
2823 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2824 goto nla_put_failure;
2825
2826 nla_put_u32(msg, RTAX_MTU, route->mtu);
2827
2828 nla_nest_end(msg, metrics);
2829 }
2830
2831 return system_rtnl_call(msg);
2832
2833 nla_put_failure:
2834 nlmsg_free(msg);
2835 return -ENOMEM;
2836 }
2837
2838 int system_add_route(struct device *dev, struct device_route *route)
2839 {
2840 return system_rt(dev, route, RTM_NEWROUTE);
2841 }
2842
2843 int system_del_route(struct device *dev, struct device_route *route)
2844 {
2845 return system_rt(dev, route, RTM_DELROUTE);
2846 }
2847
2848 int system_flush_routes(void)
2849 {
2850 const char *names[] = { "ipv4", "ipv6" };
2851 size_t i;
2852 int fd;
2853
2854 for (i = 0; i < ARRAY_SIZE(names); i++) {
2855 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2856 fd = open(dev_buf, O_WRONLY);
2857 if (fd < 0)
2858 continue;
2859
2860 if (write(fd, "-1", 2)) {}
2861 close(fd);
2862 }
2863 return 0;
2864 }
2865
2866 bool system_resolve_rt_type(const char *type, unsigned int *id)
2867 {
2868 return system_rtn_aton(type, id);
2869 }
2870
2871 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2872 {
2873 FILE *f;
2874 char *e, buf[128];
2875 unsigned int n, proto = 256;
2876 n = strtoul(type, &e, 0);
2877 if (!*e && e != type)
2878 proto = n;
2879 else if (!strcmp(type, "unspec"))
2880 proto = RTPROT_UNSPEC;
2881 else if (!strcmp(type, "kernel"))
2882 proto = RTPROT_KERNEL;
2883 else if (!strcmp(type, "boot"))
2884 proto = RTPROT_BOOT;
2885 else if (!strcmp(type, "static"))
2886 proto = RTPROT_STATIC;
2887 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2888 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2889 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2890 continue;
2891
2892 n = strtoul(e, NULL, 10);
2893 e = strtok(NULL, " \t\n");
2894
2895 if (e && !strcmp(e, type)) {
2896 proto = n;
2897 break;
2898 }
2899 }
2900 fclose(f);
2901 }
2902
2903 if (proto > 255)
2904 return false;
2905
2906 *id = proto;
2907 return true;
2908 }
2909
2910 bool system_resolve_rt_table(const char *name, unsigned int *id)
2911 {
2912 FILE *f;
2913 char *e, buf[128];
2914 unsigned int n, table = RT_TABLE_UNSPEC;
2915
2916 /* first try to parse table as number */
2917 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2918 table = n;
2919
2920 /* handle well known aliases */
2921 else if (!strcmp(name, "default"))
2922 table = RT_TABLE_DEFAULT;
2923 else if (!strcmp(name, "main"))
2924 table = RT_TABLE_MAIN;
2925 else if (!strcmp(name, "local"))
2926 table = RT_TABLE_LOCAL;
2927
2928 /* try to look up name in /etc/iproute2/rt_tables */
2929 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2930 {
2931 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2932 {
2933 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2934 continue;
2935
2936 n = strtoul(e, NULL, 10);
2937 e = strtok(NULL, " \t\n");
2938
2939 if (e && !strcmp(e, name))
2940 {
2941 table = n;
2942 break;
2943 }
2944 }
2945
2946 fclose(f);
2947 }
2948
2949 if (table == RT_TABLE_UNSPEC)
2950 return false;
2951
2952 *id = table;
2953 return true;
2954 }
2955
2956 bool system_is_default_rt_table(unsigned int id)
2957 {
2958 return (id == RT_TABLE_MAIN);
2959 }
2960
2961 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2962 {
2963 char *e;
2964 unsigned int n;
2965
2966 if (!strcmp(filter, "strict"))
2967 n = 1;
2968 else if (!strcmp(filter, "loose"))
2969 n = 2;
2970 else {
2971 n = strtoul(filter, &e, 0);
2972 if (*e || e == filter || n > 2)
2973 return false;
2974 }
2975
2976 *id = n;
2977 return true;
2978 }
2979
2980 static int system_iprule(struct iprule *rule, int cmd)
2981 {
2982 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2983
2984 struct nl_msg *msg;
2985 struct rtmsg rtm = {
2986 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2987 .rtm_protocol = RTPROT_STATIC,
2988 .rtm_scope = RT_SCOPE_UNIVERSE,
2989 .rtm_table = RT_TABLE_UNSPEC,
2990 .rtm_type = RTN_UNSPEC,
2991 .rtm_flags = 0,
2992 };
2993
2994 if (cmd == RTM_NEWRULE)
2995 rtm.rtm_type = RTN_UNICAST;
2996
2997 if (rule->invert)
2998 rtm.rtm_flags |= FIB_RULE_INVERT;
2999
3000 if (rule->flags & IPRULE_SRC)
3001 rtm.rtm_src_len = rule->src_mask;
3002
3003 if (rule->flags & IPRULE_DEST)
3004 rtm.rtm_dst_len = rule->dest_mask;
3005
3006 if (rule->flags & IPRULE_TOS)
3007 rtm.rtm_tos = rule->tos;
3008
3009 if (rule->flags & IPRULE_LOOKUP) {
3010 if (rule->lookup < 256)
3011 rtm.rtm_table = rule->lookup;
3012 }
3013
3014 if (rule->flags & IPRULE_ACTION)
3015 rtm.rtm_type = rule->action;
3016 else if (rule->flags & IPRULE_GOTO)
3017 rtm.rtm_type = FR_ACT_GOTO;
3018 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3019 rtm.rtm_type = FR_ACT_NOP;
3020
3021 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3022
3023 if (!msg)
3024 return -1;
3025
3026 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3027
3028 if (rule->flags & IPRULE_IN)
3029 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3030
3031 if (rule->flags & IPRULE_OUT)
3032 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3033
3034 if (rule->flags & IPRULE_SRC)
3035 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3036
3037 if (rule->flags & IPRULE_DEST)
3038 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3039
3040 if (rule->flags & IPRULE_PRIORITY)
3041 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3042 else if (cmd == RTM_NEWRULE)
3043 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3044
3045 if (rule->flags & IPRULE_FWMARK)
3046 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3047
3048 if (rule->flags & IPRULE_FWMASK)
3049 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3050
3051 if (rule->flags & IPRULE_LOOKUP) {
3052 if (rule->lookup >= 256)
3053 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3054 }
3055
3056 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3057 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3058
3059 if (rule->flags & IPRULE_UIDRANGE) {
3060 struct fib_rule_uid_range uidrange = {
3061 .start = rule->uidrange_start,
3062 .end = rule->uidrange_end
3063 };
3064
3065 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3066 }
3067
3068 if (rule->flags & IPRULE_GOTO)
3069 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3070
3071 return system_rtnl_call(msg);
3072 }
3073
3074 int system_add_iprule(struct iprule *rule)
3075 {
3076 return system_iprule(rule, RTM_NEWRULE);
3077 }
3078
3079 int system_del_iprule(struct iprule *rule)
3080 {
3081 return system_iprule(rule, RTM_DELRULE);
3082 }
3083
3084 int system_flush_iprules(void)
3085 {
3086 int rv = 0;
3087 struct iprule rule;
3088
3089 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3090 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3091
3092 memset(&rule, 0, sizeof(rule));
3093
3094
3095 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3096
3097 rule.priority = 0;
3098 rule.lookup = RT_TABLE_LOCAL;
3099 rv |= system_iprule(&rule, RTM_NEWRULE);
3100
3101 rule.priority = 32766;
3102 rule.lookup = RT_TABLE_MAIN;
3103 rv |= system_iprule(&rule, RTM_NEWRULE);
3104
3105 rule.priority = 32767;
3106 rule.lookup = RT_TABLE_DEFAULT;
3107 rv |= system_iprule(&rule, RTM_NEWRULE);
3108
3109
3110 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3111
3112 rule.priority = 0;
3113 rule.lookup = RT_TABLE_LOCAL;
3114 rv |= system_iprule(&rule, RTM_NEWRULE);
3115
3116 rule.priority = 32766;
3117 rule.lookup = RT_TABLE_MAIN;
3118 rv |= system_iprule(&rule, RTM_NEWRULE);
3119
3120 return rv;
3121 }
3122
3123 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3124 {
3125 return system_rtn_aton(action, id);
3126 }
3127
3128 time_t system_get_rtime(void)
3129 {
3130 struct timespec ts;
3131 struct timeval tv;
3132
3133 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3134 return ts.tv_sec;
3135
3136 if (gettimeofday(&tv, NULL) == 0)
3137 return tv.tv_sec;
3138
3139 return 0;
3140 }
3141
3142 #ifndef IP_DF
3143 #define IP_DF 0x4000
3144 #endif
3145
3146 static int tunnel_ioctl(const char *name, int cmd, void *p)
3147 {
3148 struct ifreq ifr;
3149
3150 memset(&ifr, 0, sizeof(ifr));
3151 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3152 ifr.ifr_ifru.ifru_data = p;
3153 return ioctl(sock_ioctl, cmd, &ifr);
3154 }
3155
3156 #ifdef IFLA_IPTUN_MAX
3157 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3158 struct blob_attr **tb)
3159 {
3160 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3161 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3162 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3163 struct blob_attr *cur;
3164 int ret = 0, ttl = 0;
3165
3166 if (!nlm)
3167 return -1;
3168
3169 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3170 nla_put_string(nlm, IFLA_IFNAME, name);
3171
3172 if (link)
3173 nla_put_u32(nlm, IFLA_LINK, link);
3174
3175 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3176 if (!linkinfo) {
3177 ret = -ENOMEM;
3178 goto failure;
3179 }
3180
3181 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3182 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3183 if (!infodata) {
3184 ret = -ENOMEM;
3185 goto failure;
3186 }
3187
3188 if (link)
3189 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3190
3191 if ((cur = tb[TUNNEL_ATTR_TTL]))
3192 ttl = blobmsg_get_u32(cur);
3193
3194 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3195 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3196
3197 struct in6_addr in6buf;
3198 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3199 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3200 ret = -EINVAL;
3201 goto failure;
3202 }
3203 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3204 }
3205
3206 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3207 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3208 ret = -EINVAL;
3209 goto failure;
3210 }
3211 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3212 }
3213
3214 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3215 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3216 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3217
3218 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3219 blobmsg_data(cur), blobmsg_len(cur));
3220
3221 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3222 char *str = blobmsg_get_string(cur);
3223
3224 if (strcmp(str, "ignore")) {
3225 char *e;
3226 unsigned encap_limit = strtoul(str, &e, 0);
3227
3228 if (e == str || *e || encap_limit > 255) {
3229 ret = -EINVAL;
3230 goto failure;
3231 }
3232
3233 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3234 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3235 }
3236 }
3237
3238 #ifdef IFLA_IPTUN_FMR_MAX
3239 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3240 struct blob_attr *rcur;
3241 unsigned rrem, fmrcnt = 0;
3242 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3243
3244 if (!fmrs) {
3245 ret = -ENOMEM;
3246 goto failure;
3247 }
3248
3249 blobmsg_for_each_attr(rcur, cur, rrem) {
3250 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3251 struct in6_addr ip6prefix;
3252 struct in_addr ip4prefix;
3253 unsigned ip4len, ip6len, ealen, offset;
3254
3255 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3256 blobmsg_data(rcur), blobmsg_len(rcur));
3257
3258 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3259 !parse_ip_and_netmask(AF_INET6,
3260 blobmsg_data(tb_cur), &ip6prefix,
3261 &ip6len)) {
3262 ret = -EINVAL;
3263 goto failure;
3264 }
3265
3266 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3267 !parse_ip_and_netmask(AF_INET,
3268 blobmsg_data(tb_cur), &ip4prefix,
3269 &ip4len)) {
3270 ret = -EINVAL;
3271 goto failure;
3272 }
3273
3274 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3275 ret = -EINVAL;
3276 goto failure;
3277 }
3278 ealen = blobmsg_get_u32(tb_cur);
3279
3280 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3281 ret = -EINVAL;
3282 goto failure;
3283 }
3284 offset = blobmsg_get_u32(tb_cur);
3285
3286 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3287 if (!rule) {
3288 ret = -ENOMEM;
3289 goto failure;
3290 }
3291
3292 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3293 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3294 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3295 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3296 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3297 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3298
3299 nla_nest_end(nlm, rule);
3300 }
3301
3302 nla_nest_end(nlm, fmrs);
3303 }
3304 #endif
3305 if (tun_flags)
3306 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3307 }
3308
3309 nla_nest_end(nlm, infodata);
3310 nla_nest_end(nlm, linkinfo);
3311
3312 return system_rtnl_call(nlm);
3313
3314 failure:
3315 nlmsg_free(nlm);
3316 return ret;
3317 }
3318 #endif
3319
3320 #ifdef IFLA_IPTUN_MAX
3321 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3322 static int system_add_gre_tunnel(const char *name, const char *kind,
3323 const unsigned int link, struct blob_attr **tb, bool v6)
3324 {
3325 struct nl_msg *nlm;
3326 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3327 struct blob_attr *cur;
3328 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3329 uint16_t iflags = 0, oflags = 0;
3330 uint8_t tos = 0;
3331 int ret = 0, ttl = 0;
3332 unsigned encap_limit = 0;
3333
3334 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3335 if (!nlm)
3336 return -1;
3337
3338 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3339 nla_put_string(nlm, IFLA_IFNAME, name);
3340
3341 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3342 if (!linkinfo) {
3343 ret = -ENOMEM;
3344 goto failure;
3345 }
3346
3347 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3348 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3349 if (!infodata) {
3350 ret = -ENOMEM;
3351 goto failure;
3352 }
3353
3354 if (link)
3355 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3356
3357 if ((cur = tb[TUNNEL_ATTR_TTL]))
3358 ttl = blobmsg_get_u32(cur);
3359
3360 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3361 char *str = blobmsg_get_string(cur);
3362 if (strcmp(str, "inherit")) {
3363 unsigned uval;
3364
3365 if (!system_tos_aton(str, &uval)) {
3366 ret = -EINVAL;
3367 goto failure;
3368 }
3369
3370 if (v6)
3371 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3372 else
3373 tos = uval;
3374 } else {
3375 if (v6)
3376 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3377 else
3378 tos = 1;
3379 }
3380 }
3381
3382 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3383 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3384
3385 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3386 blobmsg_data(cur), blobmsg_len(cur));
3387
3388 if ((cur = tb_data[GRE_DATA_IKEY])) {
3389 if ((ikey = blobmsg_get_u32(cur)))
3390 iflags |= GRE_KEY;
3391 }
3392
3393 if ((cur = tb_data[GRE_DATA_OKEY])) {
3394 if ((okey = blobmsg_get_u32(cur)))
3395 oflags |= GRE_KEY;
3396 }
3397
3398 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3399 if (blobmsg_get_bool(cur))
3400 iflags |= GRE_CSUM;
3401 }
3402
3403 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3404 if (blobmsg_get_bool(cur))
3405 oflags |= GRE_CSUM;
3406 }
3407
3408 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3409 if (blobmsg_get_bool(cur))
3410 iflags |= GRE_SEQ;
3411 }
3412
3413 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3414 if (blobmsg_get_bool(cur))
3415 oflags |= GRE_SEQ;
3416 }
3417
3418 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3419 char *str = blobmsg_get_string(cur);
3420
3421 if (strcmp(str, "ignore")) {
3422 char *e;
3423
3424 encap_limit = strtoul(str, &e, 0);
3425
3426 if (e == str || *e || encap_limit > 255) {
3427 ret = -EINVAL;
3428 goto failure;
3429 }
3430
3431 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3432 }
3433 }
3434 }
3435
3436 if (v6) {
3437 struct in6_addr in6buf;
3438 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3439 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3440 ret = -EINVAL;
3441 goto failure;
3442 }
3443 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3444 }
3445
3446 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3447 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3448 ret = -EINVAL;
3449 goto failure;
3450 }
3451 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3452 }
3453
3454 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3455 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3456
3457 if (flowinfo)
3458 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3459
3460 if (flags6)
3461 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3462
3463 if (!ttl)
3464 ttl = 64;
3465 } else {
3466 struct in_addr inbuf;
3467 bool set_df = true;
3468
3469 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3470 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3471 ret = -EINVAL;
3472 goto failure;
3473 }
3474 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3475 }
3476
3477 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3478 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3479 ret = -EINVAL;
3480 goto failure;
3481 }
3482 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3483
3484 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3485 if (!okey) {
3486 okey = inbuf.s_addr;
3487 oflags |= GRE_KEY;
3488 }
3489
3490 if (!ikey) {
3491 ikey = inbuf.s_addr;
3492 iflags |= GRE_KEY;
3493 }
3494 }
3495 }
3496
3497 if ((cur = tb[TUNNEL_ATTR_DF]))
3498 set_df = blobmsg_get_bool(cur);
3499
3500 if (!set_df) {
3501 /* ttl != 0 and nopmtudisc are incompatible */
3502 if (ttl) {
3503 ret = -EINVAL;
3504 goto failure;
3505 }
3506 } else if (!ttl)
3507 ttl = 64;
3508
3509 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3510
3511 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3512 }
3513
3514 if (ttl)
3515 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3516
3517 if (oflags)
3518 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3519
3520 if (iflags)
3521 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3522
3523 if (okey)
3524 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3525
3526 if (ikey)
3527 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3528
3529 nla_nest_end(nlm, infodata);
3530 nla_nest_end(nlm, linkinfo);
3531
3532 return system_rtnl_call(nlm);
3533
3534 failure:
3535 nlmsg_free(nlm);
3536 return ret;
3537 }
3538 #endif
3539
3540 #ifdef IFLA_VTI_MAX
3541 static int system_add_vti_tunnel(const char *name, const char *kind,
3542 const unsigned int link, struct blob_attr **tb, bool v6)
3543 {
3544 struct nl_msg *nlm;
3545 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3546 struct blob_attr *cur;
3547 int ret = 0;
3548
3549 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3550 if (!nlm)
3551 return -1;
3552
3553 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3554 nla_put_string(nlm, IFLA_IFNAME, name);
3555
3556 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3557 if (!linkinfo) {
3558 ret = -ENOMEM;
3559 goto failure;
3560 }
3561
3562 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3563 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3564 if (!infodata) {
3565 ret = -ENOMEM;
3566 goto failure;
3567 }
3568
3569 if (link)
3570 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3571
3572 if (v6) {
3573 struct in6_addr in6buf;
3574 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3575 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3576 ret = -EINVAL;
3577 goto failure;
3578 }
3579 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3580 }
3581
3582 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3583 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3584 ret = -EINVAL;
3585 goto failure;
3586 }
3587 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3588 }
3589
3590 } else {
3591 struct in_addr inbuf;
3592
3593 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3594 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3595 ret = -EINVAL;
3596 goto failure;
3597 }
3598 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3599 }
3600
3601 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3602 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3603 ret = -EINVAL;
3604 goto failure;
3605 }
3606 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3607 }
3608
3609 }
3610
3611 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3612 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3613 uint32_t ikey = 0, okey = 0;
3614
3615 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3616 blobmsg_data(cur), blobmsg_len(cur));
3617
3618 if ((cur = tb_data[VTI_DATA_IKEY])) {
3619 if ((ikey = blobmsg_get_u32(cur)))
3620 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3621 }
3622
3623 if ((cur = tb_data[VTI_DATA_OKEY])) {
3624 if ((okey = blobmsg_get_u32(cur)))
3625 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3626 }
3627 }
3628
3629 nla_nest_end(nlm, infodata);
3630 nla_nest_end(nlm, linkinfo);
3631
3632 return system_rtnl_call(nlm);
3633
3634 failure:
3635 nlmsg_free(nlm);
3636 return ret;
3637 }
3638 #endif
3639
3640 #ifdef IFLA_XFRM_MAX
3641 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3642 const unsigned int link, struct blob_attr **tb)
3643 {
3644 struct nl_msg *nlm;
3645 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3646 struct blob_attr *cur;
3647 int ret = 0;
3648
3649 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3650 if (!nlm)
3651 return -1;
3652
3653 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3654 nla_put_string(nlm, IFLA_IFNAME, name);
3655
3656 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3657 if (!linkinfo) {
3658 ret = -ENOMEM;
3659 goto failure;
3660 }
3661
3662 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3663 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3664 if (!infodata) {
3665 ret = -ENOMEM;
3666 goto failure;
3667 }
3668
3669 if (link)
3670 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3671
3672 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3673 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3674 uint32_t if_id = 0;
3675
3676 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3677 blobmsg_data(cur), blobmsg_len(cur));
3678
3679 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3680 if ((if_id = blobmsg_get_u32(cur)))
3681 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3682 }
3683
3684 }
3685
3686 nla_nest_end(nlm, infodata);
3687 nla_nest_end(nlm, linkinfo);
3688
3689 return system_rtnl_call(nlm);
3690
3691 failure:
3692 nlmsg_free(nlm);
3693 return ret;
3694 }
3695 #endif
3696
3697 #ifdef IFLA_VXLAN_MAX
3698 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3699 struct blob_attr *cur;
3700 if ((cur = tb_data[vxlandatatype])) {
3701 bool val = blobmsg_get_bool(cur);
3702 if (invert)
3703 val = !val;
3704
3705 if ((attrtype == IFLA_VXLAN_GBP) && val)
3706 nla_put_flag(msg, attrtype);
3707 else
3708 nla_put_u8(msg, attrtype, val);
3709
3710 }
3711 }
3712
3713 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3714 {
3715 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3716 struct nl_msg *msg;
3717 struct nlattr *linkinfo, *data;
3718 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3719 struct blob_attr *cur;
3720 int ret = 0;
3721
3722 if ((cur = tb[TUNNEL_ATTR_DATA]))
3723 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3724 blobmsg_data(cur), blobmsg_len(cur));
3725 else
3726 return -EINVAL;
3727
3728 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3729
3730 if (!msg)
3731 return -1;
3732
3733 nlmsg_append(msg, &iim, sizeof(iim), 0);
3734
3735 nla_put_string(msg, IFLA_IFNAME, name);
3736
3737 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3738 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3739 if (!ea) {
3740 ret = -EINVAL;
3741 goto failure;
3742 }
3743
3744 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3745 }
3746
3747 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3748 uint32_t mtu = blobmsg_get_u32(cur);
3749 nla_put_u32(msg, IFLA_MTU, mtu);
3750 }
3751
3752 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3753 ret = -ENOMEM;
3754 goto failure;
3755 }
3756
3757 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3758
3759 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3760 ret = -ENOMEM;
3761 goto failure;
3762 }
3763
3764 if (link)
3765 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3766
3767 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3768 uint32_t id = blobmsg_get_u32(cur);
3769 if (id >= (1u << 24) - 1) {
3770 ret = -EINVAL;
3771 goto failure;
3772 }
3773
3774 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3775 }
3776
3777 if (v6) {
3778 struct in6_addr in6buf;
3779 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3780 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3781 ret = -EINVAL;
3782 goto failure;
3783 }
3784 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3785 }
3786
3787 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3788 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3789 ret = -EINVAL;
3790 goto failure;
3791 }
3792 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3793 }
3794 } else {
3795 struct in_addr inbuf;
3796
3797 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3798 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3799 ret = -EINVAL;
3800 goto failure;
3801 }
3802 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3803 }
3804
3805 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3806 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3807 ret = -EINVAL;
3808 goto failure;
3809 }
3810 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3811 }
3812 }
3813
3814 uint32_t port = 4789;
3815 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3816 port = blobmsg_get_u32(cur);
3817 if (port < 1 || port > 65535) {
3818 ret = -EINVAL;
3819 goto failure;
3820 }
3821 }
3822 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3823
3824 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3825 struct ifla_vxlan_port_range srcports = {0,0};
3826
3827 uint32_t low = blobmsg_get_u32(cur);
3828 if (low < 1 || low > 65535 - 1) {
3829 ret = -EINVAL;
3830 goto failure;
3831 }
3832
3833 srcports.low = htons((uint16_t) low);
3834 srcports.high = htons((uint16_t) (low+1));
3835
3836 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3837 uint32_t high = blobmsg_get_u32(cur);
3838 if (high < 1 || high > 65535) {
3839 ret = -EINVAL;
3840 goto failure;
3841 }
3842
3843 if (high > low)
3844 srcports.high = htons((uint16_t) high);
3845 }
3846
3847 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3848 }
3849
3850 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3851 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3852 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3853 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3854 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3855 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3856 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3857 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3858 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3859
3860 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3861 uint32_t ageing = blobmsg_get_u32(cur);
3862 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3863 }
3864
3865 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3866 uint32_t maxaddress = blobmsg_get_u32(cur);
3867 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3868 }
3869
3870 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3871 char *str = blobmsg_get_string(cur);
3872 unsigned tos = 1;
3873
3874 if (strcmp(str, "inherit")) {
3875 if (!system_tos_aton(str, &tos)) {
3876 ret = -EINVAL;
3877 goto failure;
3878 }
3879 }
3880
3881 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3882 }
3883
3884 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3885 uint32_t ttl = blobmsg_get_u32(cur);
3886 if (ttl < 1 || ttl > 255) {
3887 ret = -EINVAL;
3888 goto failure;
3889 }
3890
3891 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3892 }
3893
3894 nla_nest_end(msg, data);
3895 nla_nest_end(msg, linkinfo);
3896
3897 ret = system_rtnl_call(msg);
3898 if (ret)
3899 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3900
3901 return ret;
3902
3903 failure:
3904 nlmsg_free(msg);
3905 return ret;
3906 }
3907 #endif
3908
3909 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3910 {
3911 struct blob_attr *cur;
3912 int ret = 0;
3913
3914 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3915 return -1;
3916
3917 #ifdef SIOCADD6RD
3918 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3919 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3920 unsigned int mask;
3921 struct ip_tunnel_6rd p6;
3922
3923 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3924 blobmsg_data(cur), blobmsg_len(cur));
3925
3926 memset(&p6, 0, sizeof(p6));
3927
3928 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3929 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3930 &p6.prefix, &mask) || mask > 128) {
3931 ret = -EINVAL;
3932 goto failure;
3933 }
3934
3935 p6.prefixlen = mask;
3936 }
3937
3938 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3939 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3940 &p6.relay_prefix, &mask) || mask > 32) {
3941 ret = -EINVAL;
3942 goto failure;
3943 }
3944
3945 p6.relay_prefixlen = mask;
3946 }
3947
3948 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3949 ret = -1;
3950 goto failure;
3951 }
3952 }
3953 #endif
3954
3955 return ret;
3956
3957 failure:
3958 system_link_del(name);
3959 return ret;
3960 }
3961
3962 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3963 {
3964 struct blob_attr *cur;
3965 bool set_df = true;
3966 struct ip_tunnel_parm p = {
3967 .link = link,
3968 .iph = {
3969 .version = 4,
3970 .ihl = 5,
3971 .protocol = proto,
3972 }
3973 };
3974
3975 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3976 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3977 return -EINVAL;
3978
3979 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3980 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3981 return -EINVAL;
3982
3983 if ((cur = tb[TUNNEL_ATTR_DF]))
3984 set_df = blobmsg_get_bool(cur);
3985
3986 if ((cur = tb[TUNNEL_ATTR_TTL]))
3987 p.iph.ttl = blobmsg_get_u32(cur);
3988
3989 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3990 char *str = blobmsg_get_string(cur);
3991 if (strcmp(str, "inherit")) {
3992 unsigned uval;
3993
3994 if (!system_tos_aton(str, &uval))
3995 return -EINVAL;
3996
3997 p.iph.tos = uval;
3998 } else
3999 p.iph.tos = 1;
4000 }
4001
4002 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4003 /* ttl !=0 and nopmtudisc are incompatible */
4004 if (p.iph.ttl && p.iph.frag_off == 0)
4005 return -EINVAL;
4006
4007 strncpy(p.name, name, sizeof(p.name) - 1);
4008
4009 switch (p.iph.protocol) {
4010 case IPPROTO_IPIP:
4011 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4012 case IPPROTO_IPV6:
4013 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4014 default:
4015 break;
4016 }
4017 return -1;
4018 }
4019
4020 int system_del_ip_tunnel(const struct device *dev)
4021 {
4022 return system_link_del(dev->ifname);
4023 }
4024
4025 int system_update_ipv6_mtu(struct device *dev, int mtu)
4026 {
4027 int ret = -1;
4028 char buf[64];
4029 int fd;
4030
4031 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4032 if (fd < 0)
4033 return ret;
4034
4035 if (!mtu) {
4036 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4037 if (len < 0)
4038 goto out;
4039
4040 buf[len] = 0;
4041 ret = atoi(buf);
4042 } else {
4043 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4044 ret = mtu;
4045 }
4046
4047 out:
4048 close(fd);
4049 return ret;
4050 }
4051
4052 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4053 {
4054 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4055 struct blob_attr *cur;
4056 const char *str;
4057
4058 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4059 blob_data(attr), blob_len(attr));
4060
4061 system_link_del(dev->ifname);
4062
4063 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4064 return -EINVAL;
4065 str = blobmsg_data(cur);
4066
4067 unsigned int ttl = 0;
4068 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4069 ttl = blobmsg_get_u32(cur);
4070 if (ttl > 255)
4071 return -EINVAL;
4072 }
4073
4074 unsigned int link = 0;
4075 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4076 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4077 if (!iface)
4078 return -EINVAL;
4079
4080 if (iface->l3_dev.dev)
4081 link = iface->l3_dev.dev->ifindex;
4082 }
4083
4084 if (!strcmp(str, "sit"))
4085 return system_add_sit_tunnel(dev->ifname, link, tb);
4086 #ifdef IFLA_IPTUN_MAX
4087 else if (!strcmp(str, "ipip6")) {
4088 return system_add_ip6_tunnel(dev->ifname, link, tb);
4089 } else if (!strcmp(str, "greip")) {
4090 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4091 } else if (!strcmp(str, "gretapip")) {
4092 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4093 } else if (!strcmp(str, "greip6")) {
4094 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4095 } else if (!strcmp(str, "gretapip6")) {
4096 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4097 #ifdef IFLA_VTI_MAX
4098 } else if (!strcmp(str, "vtiip")) {
4099 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4100 } else if (!strcmp(str, "vtiip6")) {
4101 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4102 #endif
4103 #ifdef IFLA_XFRM_MAX
4104 } else if (!strcmp(str, "xfrm")) {
4105 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4106 #endif
4107 #ifdef IFLA_VXLAN_MAX
4108 } else if(!strcmp(str, "vxlan")) {
4109 return system_add_vxlan(dev->ifname, link, tb, false);
4110 } else if(!strcmp(str, "vxlan6")) {
4111 return system_add_vxlan(dev->ifname, link, tb, true);
4112 #endif
4113 #endif
4114 } else if (!strcmp(str, "ipip")) {
4115 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4116 }
4117 else
4118 return -EINVAL;
4119
4120 return 0;
4121 }
OpenWrt Network interface configuration daemon