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treewide: fix multiple compiler warnings
[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, 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 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1024 nla_nest_end(nlm, afspec);
1025
1026 return system_rtnl_call(nlm);
1027
1028 failure:
1029 nlmsg_free(nlm);
1030 return ret;
1031 }
1032
1033 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1034 {
1035 const char *ifname = dev->ifname;
1036 struct blob_attr *cur;
1037 char op = cfg ? '+' : '-';
1038 char buf[64];
1039 size_t rem;
1040
1041 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1042 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1043 write_file(dev_buf, buf);
1044
1045 if (!cfg)
1046 return 0;
1047
1048 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1049
1050 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1051
1052 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1053 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1054 cfg->policy == BONDING_MODE_8023AD)
1055 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1056
1057 if (cfg->policy == BONDING_MODE_8023AD) {
1058 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1059 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1060 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1061 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1062 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1063 }
1064
1065 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1066 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1067
1068 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1069 cfg->policy == BONDING_MODE_BALANCE_ALB)
1070 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1071
1072 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1073 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1074 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1075 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1076 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1077 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1078
1079 system_set_dev_sysfs_int((cfg->monitor_arp ?
1080 "bonding/arp_interval" :
1081 "bonding/miimon"), ifname, cfg->monitor_interval);
1082
1083 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1084 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1085 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1086 }
1087
1088 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1089 if (cfg->policy < BONDING_MODE_8023AD)
1090 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1091 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1092 if (!cfg->monitor_arp && cfg->monitor_interval) {
1093 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1094 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1095 }
1096
1097 return 0;
1098 }
1099
1100 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1101 {
1102 const char *port_name = port->ifname;
1103 const char op_ch = add ? '+' : '-';
1104 char buf[IFNAMSIZ + 1];
1105
1106 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1107 system_if_down(port);
1108 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1109 system_if_up(port);
1110
1111 if (primary)
1112 system_set_dev_sysfs("bonding/primary", dev->ifname,
1113 add ? port_name : "");
1114
1115 return 0;
1116 }
1117
1118 int system_if_resolve(struct device *dev)
1119 {
1120 struct ifreq ifr;
1121
1122 memset(&ifr, 0, sizeof(ifr));
1123 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1124 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1125 return ifr.ifr_ifindex;
1126 else
1127 return 0;
1128 }
1129
1130 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1131 {
1132 struct ifreq ifr;
1133
1134 memset(&ifr, 0, sizeof(ifr));
1135 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1136 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1137 return -1;
1138
1139 ifr.ifr_flags |= add;
1140 ifr.ifr_flags &= ~rem;
1141 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1142 }
1143
1144 struct clear_data {
1145 struct nl_msg *msg;
1146 struct device *dev;
1147 int type;
1148 int size;
1149 int af;
1150 };
1151
1152
1153 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1154 {
1155 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1156
1157 return (long)ifa->ifa_index == ifindex;
1158 }
1159
1160 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1161 {
1162 struct rtmsg *r = NLMSG_DATA(hdr);
1163 struct nlattr *tb[__RTA_MAX];
1164
1165 if (r->rtm_protocol == RTPROT_KERNEL &&
1166 r->rtm_family == AF_INET6)
1167 return false;
1168
1169 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1170 if (!tb[RTA_OIF])
1171 return false;
1172
1173 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1174 }
1175
1176 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1177 {
1178 return true;
1179 }
1180
1181 static int cb_clear_event(struct nl_msg *msg, void *arg)
1182 {
1183 struct clear_data *clr = arg;
1184 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1185 bool (*cb)(struct nlmsghdr *, int ifindex);
1186 int type, ret;
1187
1188 switch(clr->type) {
1189 case RTM_GETADDR:
1190 type = RTM_DELADDR;
1191 if (hdr->nlmsg_type != RTM_NEWADDR)
1192 return NL_SKIP;
1193
1194 cb = check_ifaddr;
1195 break;
1196 case RTM_GETROUTE:
1197 type = RTM_DELROUTE;
1198 if (hdr->nlmsg_type != RTM_NEWROUTE)
1199 return NL_SKIP;
1200
1201 cb = check_route;
1202 break;
1203 case RTM_GETRULE:
1204 type = RTM_DELRULE;
1205 if (hdr->nlmsg_type != RTM_NEWRULE)
1206 return NL_SKIP;
1207
1208 cb = check_rule;
1209 break;
1210 default:
1211 return NL_SKIP;
1212 }
1213
1214 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1215 return NL_SKIP;
1216
1217 if (type == RTM_DELRULE)
1218 D(SYSTEM, "Remove a rule\n");
1219 else
1220 D(SYSTEM, "Remove %s from device %s\n",
1221 type == RTM_DELADDR ? "an address" : "a route",
1222 clr->dev->ifname);
1223
1224 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1225 hdr = nlmsg_hdr(clr->msg);
1226 hdr->nlmsg_type = type;
1227 hdr->nlmsg_flags = NLM_F_REQUEST;
1228
1229 nl_socket_disable_auto_ack(sock_rtnl);
1230 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1231 if (ret < 0) {
1232 if (type == RTM_DELRULE)
1233 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1234 else
1235 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1236 type == RTM_DELADDR ? "an address" : "a route",
1237 clr->dev->ifname, ret);
1238 }
1239
1240 nl_socket_enable_auto_ack(sock_rtnl);
1241
1242 return NL_SKIP;
1243 }
1244
1245 static int
1246 cb_finish_event(struct nl_msg *msg, void *arg)
1247 {
1248 int *pending = arg;
1249 *pending = 0;
1250 return NL_STOP;
1251 }
1252
1253 static int
1254 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1255 {
1256 int *pending = arg;
1257 *pending = err->error;
1258 return NL_STOP;
1259 }
1260
1261 static void
1262 system_if_clear_entries(struct device *dev, int type, int af)
1263 {
1264 struct clear_data clr;
1265 struct nl_cb *cb;
1266 struct rtmsg rtm = {
1267 .rtm_family = af,
1268 .rtm_flags = RTM_F_CLONED,
1269 };
1270 int flags = NLM_F_DUMP;
1271 int pending = 1;
1272
1273 clr.af = af;
1274 clr.dev = dev;
1275 clr.type = type;
1276 switch (type) {
1277 case RTM_GETADDR:
1278 case RTM_GETRULE:
1279 clr.size = sizeof(struct rtgenmsg);
1280 break;
1281 case RTM_GETROUTE:
1282 clr.size = sizeof(struct rtmsg);
1283 break;
1284 default:
1285 return;
1286 }
1287
1288 cb = nl_cb_alloc(NL_CB_DEFAULT);
1289 if (!cb)
1290 return;
1291
1292 clr.msg = nlmsg_alloc_simple(type, flags);
1293 if (!clr.msg)
1294 goto out;
1295
1296 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1297 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1298 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1299 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1300
1301 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1302 goto free;
1303
1304 while (pending > 0)
1305 nl_recvmsgs(sock_rtnl, cb);
1306
1307 free:
1308 nlmsg_free(clr.msg);
1309 out:
1310 nl_cb_put(cb);
1311 }
1312
1313 /*
1314 * Clear bridge (membership) state and bring down device
1315 */
1316 void system_if_clear_state(struct device *dev)
1317 {
1318 static char buf[256];
1319 char *bridge;
1320 device_set_ifindex(dev, system_if_resolve(dev));
1321
1322 if (dev->external || !dev->ifindex)
1323 return;
1324
1325 system_if_flags(dev->ifname, 0, IFF_UP);
1326
1327 if (system_is_bridge(dev->ifname)) {
1328 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1329 system_bridge_delbr(dev);
1330 return;
1331 }
1332
1333 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1334 if (bridge) {
1335 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1336 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1337 }
1338
1339 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1340 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1341 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1342 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1343 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1344 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1345 system_set_disable_ipv6(dev, "0");
1346 }
1347
1348 static inline unsigned long
1349 sec_to_jiffies(int val)
1350 {
1351 return (unsigned long) val * 100;
1352 }
1353
1354 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1355 {
1356 struct nlattr *linkinfo, *data;
1357 struct nl_msg *msg;
1358 uint64_t val;
1359 int rv;
1360
1361 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1362 if (!msg)
1363 return -1;
1364
1365 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1366 goto nla_put_failure;
1367
1368 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1369
1370 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1371 goto nla_put_failure;
1372
1373 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1374 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1375 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1376 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1377 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1378
1379 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1380 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1381
1382 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1383 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1384 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1385 }
1386
1387 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1388 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1389
1390 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1391 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1392
1393 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1394 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1395
1396 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1397 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1398 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1399 val = cfg->robustness * cfg->query_interval +
1400 cfg->query_response_interval;
1401
1402 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1403
1404 val -= cfg->query_response_interval / 2;
1405
1406 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1407 }
1408
1409 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1410 val = cfg->query_interval / 4;
1411
1412 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1413 }
1414
1415 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1416 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1417 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1418 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1419
1420 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1421 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1422
1423 nla_nest_end(msg, data);
1424 nla_nest_end(msg, linkinfo);
1425
1426 rv = system_rtnl_call(msg);
1427 if (rv)
1428 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1429
1430 return rv;
1431
1432 nla_put_failure:
1433 nlmsg_free(msg);
1434 return -ENOMEM;
1435 }
1436
1437 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1438 {
1439 struct nl_msg *msg;
1440 struct nlattr *linkinfo, *data;
1441 size_t i;
1442 int rv;
1443 static const struct {
1444 const char *name;
1445 enum macvlan_mode val;
1446 } modes[] = {
1447 { "private", MACVLAN_MODE_PRIVATE },
1448 { "vepa", MACVLAN_MODE_VEPA },
1449 { "bridge", MACVLAN_MODE_BRIDGE },
1450 { "passthru", MACVLAN_MODE_PASSTHRU },
1451 };
1452
1453 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1454 if (!msg)
1455 return -1;
1456
1457 if (cfg->flags & MACVLAN_OPT_MACADDR)
1458 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1459 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1460
1461 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1462 goto nla_put_failure;
1463
1464 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1465
1466 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1467 goto nla_put_failure;
1468
1469 if (cfg->mode) {
1470 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1471 if (strcmp(cfg->mode, modes[i].name) != 0)
1472 continue;
1473
1474 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1475 break;
1476 }
1477 }
1478
1479 nla_nest_end(msg, data);
1480 nla_nest_end(msg, linkinfo);
1481
1482 rv = system_rtnl_call(msg);
1483 if (rv)
1484 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1485
1486 return rv;
1487
1488 nla_put_failure:
1489 nlmsg_free(msg);
1490 return -ENOMEM;
1491 }
1492
1493 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1494 {
1495 struct nl_msg *msg;
1496 int index;
1497
1498 if (!dev)
1499 return -1;
1500
1501 index = system_if_resolve(dev);
1502 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1503 if (!msg)
1504 return -1;
1505
1506 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1507 return system_rtnl_call(msg);
1508 }
1509
1510 int system_macvlan_del(struct device *macvlan)
1511 {
1512 return system_link_del(macvlan->ifname);
1513 }
1514
1515 int system_netns_open(const pid_t target_ns)
1516 {
1517 char pid_net_path[PATH_MAX];
1518
1519 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1520
1521 return open(pid_net_path, O_RDONLY);
1522 }
1523
1524 int system_netns_set(int netns_fd)
1525 {
1526 return setns(netns_fd, CLONE_NEWNET);
1527 }
1528
1529 int system_veth_add(struct device *veth, struct veth_config *cfg)
1530 {
1531 struct nl_msg *msg;
1532 struct ifinfomsg empty_iim = {0,};
1533 struct nlattr *linkinfo, *data, *veth_info;
1534 int rv;
1535
1536 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1537
1538 if (!msg)
1539 return -1;
1540
1541 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1542
1543 if (cfg->flags & VETH_OPT_MACADDR)
1544 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1545 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1546
1547 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1548 goto nla_put_failure;
1549
1550 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1551
1552 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1553 goto nla_put_failure;
1554
1555 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1556 goto nla_put_failure;
1557
1558 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1559
1560 if (cfg->flags & VETH_OPT_PEER_NAME)
1561 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1562 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1563 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1564
1565 nla_nest_end(msg, veth_info);
1566 nla_nest_end(msg, data);
1567 nla_nest_end(msg, linkinfo);
1568
1569 rv = system_rtnl_call(msg);
1570 if (rv) {
1571 if (cfg->flags & VETH_OPT_PEER_NAME)
1572 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1573 else
1574 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1575 }
1576
1577 return rv;
1578
1579 nla_put_failure:
1580 nlmsg_free(msg);
1581 return -ENOMEM;
1582 }
1583
1584 int system_veth_del(struct device *veth)
1585 {
1586 return system_link_del(veth->ifname);
1587 }
1588
1589 static int system_vlan(struct device *dev, int id)
1590 {
1591 struct vlan_ioctl_args ifr = {
1592 .cmd = SET_VLAN_NAME_TYPE_CMD,
1593 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1594 };
1595
1596 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1597 return -1;
1598
1599 if (id < 0) {
1600 ifr.cmd = DEL_VLAN_CMD;
1601 ifr.u.VID = 0;
1602 } else {
1603 ifr.cmd = ADD_VLAN_CMD;
1604 ifr.u.VID = id;
1605 }
1606 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1607 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1608 }
1609
1610 int system_vlan_add(struct device *dev, int id)
1611 {
1612 return system_vlan(dev, id);
1613 }
1614
1615 int system_vlan_del(struct device *dev)
1616 {
1617 return system_vlan(dev, -1);
1618 }
1619
1620 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1621 {
1622 struct nl_msg *msg;
1623 struct nlattr *linkinfo, *data, *qos;
1624 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1625 struct vlan_qos_mapping *elem;
1626 struct ifla_vlan_qos_mapping nl_qos_map;
1627 int rv;
1628
1629 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1630
1631 if (!msg)
1632 return -1;
1633
1634 nlmsg_append(msg, &iim, sizeof(iim), 0);
1635 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1636 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1637
1638 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1639 goto nla_put_failure;
1640
1641 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1642
1643 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1644 goto nla_put_failure;
1645
1646 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1647
1648 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1649 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1650 #else
1651 if(cfg->proto == VLAN_PROTO_8021AD)
1652 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);
1653 #endif
1654
1655 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1656 goto nla_put_failure;
1657
1658 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1659 nl_qos_map.from = elem->from;
1660 nl_qos_map.to = elem->to;
1661 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1662 }
1663 nla_nest_end(msg, qos);
1664
1665 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1666 goto nla_put_failure;
1667
1668 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1669 nl_qos_map.from = elem->from;
1670 nl_qos_map.to = elem->to;
1671 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1672 }
1673 nla_nest_end(msg, qos);
1674
1675 nla_nest_end(msg, data);
1676 nla_nest_end(msg, linkinfo);
1677
1678 rv = system_rtnl_call(msg);
1679 if (rv)
1680 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1681
1682 return rv;
1683
1684 nla_put_failure:
1685 nlmsg_free(msg);
1686 return -ENOMEM;
1687 }
1688
1689 int system_vlandev_del(struct device *vlandev)
1690 {
1691 return system_link_del(vlandev->ifname);
1692 }
1693
1694 static void
1695 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1696 {
1697 struct ethtool_cmd ecmd = {
1698 .cmd = ETHTOOL_GSET,
1699 };
1700 struct ifreq ifr = {
1701 .ifr_data = (caddr_t)&ecmd,
1702 };
1703 static const struct {
1704 unsigned int speed;
1705 uint8_t bit_half;
1706 uint8_t bit_full;
1707 } speed_mask[] = {
1708 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1709 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1710 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1711 };
1712 uint32_t adv;
1713 size_t i;
1714
1715 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1716
1717 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1718 return;
1719
1720 adv = ecmd.supported;
1721 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1722 if (s->flags & DEV_OPT_DUPLEX) {
1723 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1724 adv &= ~(1 << bit);
1725 }
1726
1727 if (!(s->flags & DEV_OPT_SPEED) ||
1728 s->speed == speed_mask[i].speed)
1729 continue;
1730
1731 adv &= ~(1 << speed_mask[i].bit_full);
1732 adv &= ~(1 << speed_mask[i].bit_half);
1733 }
1734
1735
1736 if (ecmd.autoneg && ecmd.advertising == adv)
1737 return;
1738
1739 ecmd.autoneg = 1;
1740 ecmd.advertising = adv;
1741 ecmd.cmd = ETHTOOL_SSET;
1742 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1743 }
1744
1745 void
1746 system_if_get_settings(struct device *dev, struct device_settings *s)
1747 {
1748 struct ifreq ifr;
1749 char buf[10];
1750
1751 memset(&ifr, 0, sizeof(ifr));
1752 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1753
1754 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1755 s->mtu = ifr.ifr_mtu;
1756 s->flags |= DEV_OPT_MTU;
1757 }
1758
1759 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1760 if (s->mtu6 > 0)
1761 s->flags |= DEV_OPT_MTU6;
1762
1763 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1764 s->txqueuelen = ifr.ifr_qlen;
1765 s->flags |= DEV_OPT_TXQUEUELEN;
1766 }
1767
1768 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1769 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1770 s->flags |= DEV_OPT_MACADDR;
1771 }
1772
1773 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1774 s->ipv6 = !strtoul(buf, NULL, 0);
1775 s->flags |= DEV_OPT_IPV6;
1776 }
1777
1778 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1779 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1780 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1781 }
1782
1783 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1784 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1785 s->flags |= DEV_OPT_PROMISC;
1786
1787 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1788 s->flags |= DEV_OPT_MULTICAST;
1789 }
1790
1791 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1792 s->rpfilter = strtoul(buf, NULL, 0);
1793 s->flags |= DEV_OPT_RPFILTER;
1794 }
1795
1796 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1797 s->acceptlocal = strtoul(buf, NULL, 0);
1798 s->flags |= DEV_OPT_ACCEPTLOCAL;
1799 }
1800
1801 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1802 s->igmpversion = strtoul(buf, NULL, 0);
1803 s->flags |= DEV_OPT_IGMPVERSION;
1804 }
1805
1806 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1807 s->mldversion = strtoul(buf, NULL, 0);
1808 s->flags |= DEV_OPT_MLDVERSION;
1809 }
1810
1811 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1812 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1813 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1814 }
1815
1816 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1817 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1818 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1819 }
1820
1821 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1822 s->neigh4locktime = strtol(buf, NULL, 0);
1823 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1824 }
1825
1826 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1827 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1828 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1829 }
1830
1831 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1832 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1833 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1834 }
1835
1836 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1837 s->dadtransmits = strtoul(buf, NULL, 0);
1838 s->flags |= DEV_OPT_DADTRANSMITS;
1839 }
1840
1841 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1842 s->sendredirects = strtoul(buf, NULL, 0);
1843 s->flags |= DEV_OPT_SENDREDIRECTS;
1844 }
1845
1846 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1847 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1848 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1849 }
1850
1851 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1852 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1853 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1854 }
1855
1856 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1857 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1858 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1859 }
1860
1861 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1862 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1863 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1864 }
1865
1866 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1867 s->arp_accept = strtoul(buf, NULL, 0);
1868 s->flags |= DEV_OPT_ARP_ACCEPT;
1869 }
1870 }
1871
1872 void
1873 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1874 {
1875 struct ifreq ifr;
1876 char buf[12];
1877
1878 apply_mask &= s->flags;
1879
1880 memset(&ifr, 0, sizeof(ifr));
1881 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1882 if (apply_mask & DEV_OPT_MTU) {
1883 ifr.ifr_mtu = s->mtu;
1884 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1885 s->flags &= ~DEV_OPT_MTU;
1886 }
1887 if (apply_mask & DEV_OPT_MTU6) {
1888 system_update_ipv6_mtu(dev, s->mtu6);
1889 }
1890 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1891 ifr.ifr_qlen = s->txqueuelen;
1892 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1893 s->flags &= ~DEV_OPT_TXQUEUELEN;
1894 }
1895 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1896 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1897 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1898 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1899 s->flags &= ~DEV_OPT_MACADDR;
1900 }
1901 if (apply_mask & DEV_OPT_IPV6)
1902 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1903 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1904 struct device dummy = {
1905 .ifname = "all",
1906 };
1907 bool ip6segmentrouting = device_check_ip6segmentrouting();
1908
1909 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1910 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1911 }
1912 if (apply_mask & DEV_OPT_PROMISC) {
1913 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1914 !s->promisc ? IFF_PROMISC : 0) < 0)
1915 s->flags &= ~DEV_OPT_PROMISC;
1916 }
1917 if (apply_mask & DEV_OPT_RPFILTER) {
1918 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1919 system_set_rpfilter(dev, buf);
1920 }
1921 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1922 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1923 if (apply_mask & DEV_OPT_IGMPVERSION) {
1924 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1925 system_set_igmpversion(dev, buf);
1926 }
1927 if (apply_mask & DEV_OPT_MLDVERSION) {
1928 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1929 system_set_mldversion(dev, buf);
1930 }
1931 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1932 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1933 system_set_neigh4reachabletime(dev, buf);
1934 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1935 system_set_neigh6reachabletime(dev, buf);
1936 }
1937 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1938 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1939 system_set_neigh4locktime(dev, buf);
1940 }
1941 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1942 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1943 system_set_neigh4gcstaletime(dev, buf);
1944 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1945 system_set_neigh6gcstaletime(dev, buf);
1946 }
1947 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1948 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1949 system_set_dadtransmits(dev, buf);
1950 }
1951 if (apply_mask & DEV_OPT_MULTICAST) {
1952 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1953 !s->multicast ? IFF_MULTICAST : 0) < 0)
1954 s->flags &= ~DEV_OPT_MULTICAST;
1955 }
1956 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1957 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1958 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1959 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1960 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1961 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1962 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1963 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1964 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1965 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1966 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1967 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1968 system_set_ethtool_settings(dev, s);
1969 }
1970
1971 int system_if_up(struct device *dev)
1972 {
1973 return system_if_flags(dev->ifname, IFF_UP, 0);
1974 }
1975
1976 int system_if_down(struct device *dev)
1977 {
1978 return system_if_flags(dev->ifname, 0, IFF_UP);
1979 }
1980
1981 struct if_check_data {
1982 struct device *dev;
1983 int pending;
1984 int ret;
1985 };
1986
1987 #ifndef IFF_LOWER_UP
1988 #define IFF_LOWER_UP 0x10000
1989 #endif
1990
1991 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1992 {
1993 struct nlmsghdr *nh = nlmsg_hdr(msg);
1994 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1995 struct if_check_data *chk = (struct if_check_data *)arg;
1996
1997 if (nh->nlmsg_type != RTM_NEWLINK)
1998 return NL_SKIP;
1999
2000 if (chk->dev->type == &simple_device_type)
2001 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
2002 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
2003
2004 return NL_OK;
2005 }
2006
2007 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2008 {
2009 struct if_check_data *chk = (struct if_check_data *)arg;
2010 chk->pending = 0;
2011 return NL_STOP;
2012 }
2013
2014 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2015 {
2016 struct if_check_data *chk = (struct if_check_data *)arg;
2017
2018 if (chk->dev->type == &simple_device_type)
2019 device_set_present(chk->dev, false);
2020 device_set_link(chk->dev, false);
2021 chk->pending = err->error;
2022
2023 return NL_STOP;
2024 }
2025
2026 struct bridge_vlan_check_data {
2027 struct device *check_dev;
2028 int ifindex;
2029 int ret;
2030 bool pending;
2031 };
2032
2033 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2034 struct bridge_vlan_port *port,
2035 struct bridge_vlan_info *vinfo)
2036 {
2037 uint16_t flags = 0, diff, mask;
2038
2039 if (port->flags & BRVLAN_F_PVID)
2040 flags |= BRIDGE_VLAN_INFO_PVID;
2041 if (port->flags & BRVLAN_F_UNTAGGED)
2042 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2043
2044 diff = vinfo->flags ^ flags;
2045 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2046 if (diff & mask) {
2047 data->ret = 1;
2048 data->pending = false;
2049 }
2050
2051 port->check = 1;
2052 }
2053
2054 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2055 struct rtattr *attr)
2056 {
2057 struct bridge_vlan_hotplug_port *port;
2058 struct bridge_vlan_info *vinfo;
2059 struct bridge_vlan *vlan;
2060 struct rtattr *cur;
2061 int rem = RTA_PAYLOAD(attr);
2062 int i;
2063
2064 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2065 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2066 continue;
2067
2068 vinfo = RTA_DATA(cur);
2069 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2070 if (!vlan) {
2071 data->ret = 1;
2072 data->pending = false;
2073 return;
2074 }
2075
2076 for (i = 0; i < vlan->n_ports; i++)
2077 if (!vlan->ports[i].check)
2078 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2079
2080 list_for_each_entry(port, &vlan->hotplug_ports, list)
2081 if (!port->port.check)
2082 bridge_vlan_check_port(data, &port->port, vinfo);
2083 }
2084 }
2085
2086 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2087 {
2088 struct bridge_vlan_check_data *data = arg;
2089 struct nlmsghdr *nh = nlmsg_hdr(msg);
2090 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2091 struct rtattr *attr;
2092 int rem;
2093
2094 if (nh->nlmsg_type != RTM_NEWLINK)
2095 return NL_SKIP;
2096
2097 if (ifi->ifi_family != AF_BRIDGE)
2098 return NL_SKIP;
2099
2100 if (ifi->ifi_index != data->ifindex)
2101 return NL_SKIP;
2102
2103 attr = IFLA_RTA(ifi);
2104 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2105 while (RTA_OK(attr, rem)) {
2106 if (attr->rta_type == IFLA_AF_SPEC)
2107 bridge_vlan_check_attr(data, attr);
2108
2109 attr = RTA_NEXT(attr, rem);
2110 }
2111
2112 return NL_SKIP;
2113 }
2114
2115 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2116 {
2117 struct bridge_vlan_check_data *data = arg;
2118 data->pending = false;
2119 return NL_STOP;
2120 }
2121
2122 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2123 {
2124 struct bridge_vlan_check_data *data = arg;
2125 data->pending = false;
2126 return NL_STOP;
2127 }
2128
2129 int system_bridge_vlan_check(struct device *dev, char *ifname)
2130 {
2131 struct bridge_vlan_check_data data = {
2132 .check_dev = dev,
2133 .ifindex = if_nametoindex(ifname),
2134 .ret = -1,
2135 .pending = true,
2136 };
2137 static struct ifinfomsg ifi = {
2138 .ifi_family = AF_BRIDGE
2139 };
2140 static struct rtattr ext_req = {
2141 .rta_type = IFLA_EXT_MASK,
2142 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2143 };
2144 uint32_t filter = RTEXT_FILTER_BRVLAN;
2145 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2146 struct bridge_vlan *vlan;
2147 struct nl_msg *msg;
2148 int i;
2149
2150 if (!data.ifindex)
2151 return 0;
2152
2153 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2154
2155 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2156 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2157 nlmsg_append(msg, &filter, sizeof(filter), 0))
2158 goto free;
2159
2160 vlist_for_each_element(&dev->vlans, vlan, node) {
2161 struct bridge_vlan_hotplug_port *port;
2162
2163 for (i = 0; i < vlan->n_ports; i++) {
2164 if (!strcmp(vlan->ports[i].ifname, ifname))
2165 vlan->ports[i].check = 0;
2166 else
2167 vlan->ports[i].check = -1;
2168 }
2169
2170 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2171 if (!strcmp(port->port.ifname, ifname))
2172 port->port.check = 0;
2173 else
2174 port->port.check = -1;
2175 }
2176 }
2177
2178 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2179 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2180 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2181 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2182
2183 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2184 goto free;
2185
2186 data.ret = 0;
2187 while (data.pending)
2188 nl_recvmsgs(sock_rtnl, cb);
2189
2190 vlist_for_each_element(&dev->vlans, vlan, node) {
2191 struct bridge_vlan_hotplug_port *port;
2192
2193 for (i = 0; i < vlan->n_ports; i++) {
2194 if (!vlan->ports[i].check) {
2195 data.ret = 1;
2196 break;
2197 }
2198 }
2199
2200 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2201 if (!port->port.check) {
2202 data.ret = 1;
2203 break;
2204 }
2205 }
2206 }
2207
2208 goto out;
2209
2210 free:
2211 nlmsg_free(msg);
2212 out:
2213 nl_cb_put(cb);
2214 return data.ret;
2215 }
2216
2217 int system_if_check(struct device *dev)
2218 {
2219 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2220 struct nl_msg *msg;
2221 struct ifinfomsg ifi = {
2222 .ifi_family = AF_UNSPEC,
2223 .ifi_index = 0,
2224 };
2225 struct if_check_data chk = {
2226 .dev = dev,
2227 .pending = 1,
2228 };
2229 int ret = 1;
2230
2231 if (!cb)
2232 return ret;
2233
2234 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2235 if (!msg)
2236 goto out;
2237
2238 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2239 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2240 goto free;
2241
2242 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2243 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2244 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2245
2246 ret = nl_send_auto_complete(sock_rtnl, msg);
2247 if (ret < 0)
2248 goto free;
2249
2250 while (chk.pending > 0)
2251 nl_recvmsgs(sock_rtnl, cb);
2252
2253 ret = chk.pending;
2254
2255 free:
2256 nlmsg_free(msg);
2257 out:
2258 nl_cb_put(cb);
2259 return ret;
2260 }
2261
2262 struct device *
2263 system_if_get_parent(struct device *dev)
2264 {
2265 char buf[64], *devname;
2266 int ifindex, iflink;
2267
2268 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2269 return NULL;
2270
2271 iflink = strtoul(buf, NULL, 0);
2272 ifindex = system_if_resolve(dev);
2273 if (!iflink || iflink == ifindex)
2274 return NULL;
2275
2276 devname = if_indextoname(iflink, buf);
2277 if (!devname)
2278 return NULL;
2279
2280 return device_get(devname, true);
2281 }
2282
2283 static bool
2284 read_string_file(int dir_fd, const char *file, char *buf, int len)
2285 {
2286 bool ret = false;
2287 char *c;
2288 int fd;
2289
2290 fd = openat(dir_fd, file, O_RDONLY);
2291 if (fd < 0)
2292 return false;
2293
2294 retry:
2295 len = read(fd, buf, len - 1);
2296 if (len < 0) {
2297 if (errno == EINTR)
2298 goto retry;
2299 } else if (len > 0) {
2300 buf[len] = 0;
2301
2302 c = strchr(buf, '\n');
2303 if (c)
2304 *c = 0;
2305
2306 ret = true;
2307 }
2308
2309 close(fd);
2310
2311 return ret;
2312 }
2313
2314 static bool
2315 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2316 {
2317 char buf[64];
2318 bool ret = false;
2319
2320 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2321 if (ret)
2322 *val = strtoull(buf, NULL, 0);
2323
2324 return ret;
2325 }
2326
2327 /* Assume advertised flags == supported flags */
2328 static const struct {
2329 uint32_t mask;
2330 const char *name;
2331 } ethtool_link_modes[] = {
2332 { ADVERTISED_10baseT_Half, "10baseT-H" },
2333 { ADVERTISED_10baseT_Full, "10baseT-F" },
2334 { ADVERTISED_100baseT_Half, "100baseT-H" },
2335 { ADVERTISED_100baseT_Full, "100baseT-F" },
2336 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2337 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2338 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2339 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2340 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2341 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2342 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2343 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2344 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2345 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2346 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2347 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2348 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2349 #ifdef ADVERTISED_56000baseKR4_Full
2350 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2351 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2352 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2353 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2354 #endif
2355 };
2356
2357 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2358 {
2359 size_t i;
2360 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2361 if (mask & ethtool_link_modes[i].mask)
2362 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2363 }
2364 }
2365
2366 bool
2367 system_if_force_external(const char *ifname)
2368 {
2369 struct stat s;
2370
2371 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2372 }
2373
2374 static const char *
2375 system_netdevtype_name(unsigned short dev_type)
2376 {
2377 size_t i;
2378
2379 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2380 if (netdev_types[i].id == dev_type)
2381 return netdev_types[i].name;
2382 }
2383
2384 /* the last key is used by default */
2385 i = ARRAY_SIZE(netdev_types) - 1;
2386
2387 return netdev_types[i].name;
2388 }
2389
2390 static void
2391 system_add_devtype(struct blob_buf *b, const char *ifname)
2392 {
2393 char buf[100];
2394 bool found = false;
2395
2396 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2397 const char *info = "DEVTYPE=";
2398 char *context = NULL;
2399 const char *line = strtok_r(buf, "\r\n", &context);
2400
2401 while (line != NULL) {
2402 char *index = strstr(line, info);
2403
2404 if (index != NULL) {
2405 blobmsg_add_string(b, "devtype", index + strlen(info));
2406 found = true;
2407 break;
2408 }
2409
2410 line = strtok_r(NULL, "\r\n", &context);
2411 }
2412 }
2413
2414 if (!found) {
2415 unsigned short number = 0;
2416 const char *name = NULL;
2417
2418 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2419 number = strtoul(buf, NULL, 0);
2420 name = system_netdevtype_name(number);
2421 blobmsg_add_string(b, "devtype", name);
2422 }
2423 }
2424 }
2425
2426 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2427
2428 static int32_t
2429 ethtool_feature_count(const char *ifname)
2430 {
2431 struct {
2432 struct ethtool_sset_info hdr;
2433 uint32_t buf;
2434 } req = {
2435 .hdr = {
2436 .cmd = ETHTOOL_GSSET_INFO,
2437 .sset_mask = 1 << ETH_SS_FEATURES
2438 }
2439 };
2440
2441 struct ifreq ifr = {
2442 .ifr_data = (void *)&req
2443 };
2444
2445 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2446
2447 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2448 return -1;
2449
2450 if (!req.hdr.sset_mask)
2451 return 0;
2452
2453 return req.buf;
2454 }
2455
2456 static int32_t
2457 ethtool_feature_index(const char *ifname, const char *keyname)
2458 {
2459 struct ethtool_gstrings *feature_names;
2460 struct ifreq ifr = { 0 };
2461 int32_t n_features;
2462 uint32_t i;
2463
2464 n_features = ethtool_feature_count(ifname);
2465
2466 if (n_features <= 0)
2467 return -1;
2468
2469 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2470
2471 if (!feature_names)
2472 return -1;
2473
2474 feature_names->cmd = ETHTOOL_GSTRINGS;
2475 feature_names->string_set = ETH_SS_FEATURES;
2476 feature_names->len = n_features;
2477
2478 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2479 ifr.ifr_data = (void *)feature_names;
2480
2481 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2482 free(feature_names);
2483
2484 return -1;
2485 }
2486
2487 for (i = 0; i < feature_names->len; i++)
2488 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2489 break;
2490
2491 if (i >= feature_names->len)
2492 i = -1;
2493
2494 free(feature_names);
2495
2496 return i;
2497 }
2498
2499 static bool
2500 ethtool_feature_value(const char *ifname, const char *keyname)
2501 {
2502 struct ethtool_get_features_block *feature_block;
2503 struct ethtool_gfeatures *feature_values;
2504 struct ifreq ifr = { 0 };
2505 int32_t feature_idx;
2506 bool active;
2507
2508 feature_idx = ethtool_feature_index(ifname, keyname);
2509
2510 if (feature_idx < 0)
2511 return false;
2512
2513 feature_values = calloc(1,
2514 sizeof(*feature_values) +
2515 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2516
2517 if (!feature_values)
2518 return false;
2519
2520 feature_values->cmd = ETHTOOL_GFEATURES;
2521 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2522
2523 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2524 ifr.ifr_data = (void *)feature_values;
2525
2526 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2527 free(feature_values);
2528
2529 return false;
2530 }
2531
2532 feature_block = &feature_values->features[feature_idx / 32];
2533 active = feature_block->active & (1U << feature_idx % 32);
2534
2535 free(feature_values);
2536
2537 return active;
2538 }
2539
2540 int
2541 system_if_dump_info(struct device *dev, struct blob_buf *b)
2542 {
2543 struct ethtool_cmd ecmd;
2544 struct ifreq ifr;
2545 char *s;
2546 void *c;
2547
2548 memset(&ecmd, 0, sizeof(ecmd));
2549 memset(&ifr, 0, sizeof(ifr));
2550 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2551 ifr.ifr_data = (caddr_t) &ecmd;
2552 ecmd.cmd = ETHTOOL_GSET;
2553
2554 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2555 c = blobmsg_open_array(b, "link-advertising");
2556 system_add_link_modes(b, ecmd.advertising);
2557 blobmsg_close_array(b, c);
2558
2559 c = blobmsg_open_array(b, "link-partner-advertising");
2560 system_add_link_modes(b, ecmd.lp_advertising);
2561 blobmsg_close_array(b, c);
2562
2563 c = blobmsg_open_array(b, "link-supported");
2564 system_add_link_modes(b, ecmd.supported);
2565 blobmsg_close_array(b, c);
2566
2567 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2568 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2569 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2570 blobmsg_add_string_buffer(b);
2571
2572 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2573 }
2574
2575 blobmsg_add_u8(b, "hw-tc-offload",
2576 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
2577
2578 system_add_devtype(b, dev->ifname);
2579
2580 return 0;
2581 }
2582
2583 int
2584 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2585 {
2586 const char *const counters[] = {
2587 "collisions", "rx_frame_errors", "tx_compressed",
2588 "multicast", "rx_length_errors", "tx_dropped",
2589 "rx_bytes", "rx_missed_errors", "tx_errors",
2590 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2591 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2592 "rx_dropped", "tx_aborted_errors", "tx_packets",
2593 "rx_errors", "tx_bytes", "tx_window_errors",
2594 "rx_fifo_errors", "tx_carrier_errors",
2595 };
2596 int stats_dir;
2597 size_t i;
2598 uint64_t val = 0;
2599
2600 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2601 if (stats_dir < 0)
2602 return -1;
2603
2604 for (i = 0; i < ARRAY_SIZE(counters); i++)
2605 if (read_uint64_file(stats_dir, counters[i], &val))
2606 blobmsg_add_u64(b, counters[i], val);
2607
2608 close(stats_dir);
2609 return 0;
2610 }
2611
2612 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2613 {
2614 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2615 int alen = v4 ? 4 : 16;
2616 unsigned int flags = 0;
2617 struct ifaddrmsg ifa = {
2618 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2619 .ifa_prefixlen = addr->mask,
2620 .ifa_index = dev->ifindex,
2621 };
2622
2623 struct nl_msg *msg;
2624 if (cmd == RTM_NEWADDR)
2625 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2626
2627 msg = nlmsg_alloc_simple(cmd, flags);
2628 if (!msg)
2629 return -1;
2630
2631 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2632 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2633 if (v4) {
2634 if (addr->broadcast)
2635 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2636 if (addr->point_to_point)
2637 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2638 } else {
2639 time_t now = system_get_rtime();
2640 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2641
2642 if (addr->preferred_until) {
2643 int64_t preferred = addr->preferred_until - now;
2644 if (preferred < 0)
2645 preferred = 0;
2646 else if (preferred > UINT32_MAX)
2647 preferred = UINT32_MAX;
2648
2649 cinfo.ifa_prefered = preferred;
2650 }
2651
2652 if (addr->valid_until) {
2653 int64_t valid = addr->valid_until - now;
2654 if (valid <= 0) {
2655 nlmsg_free(msg);
2656 return -1;
2657 }
2658 else if (valid > UINT32_MAX)
2659 valid = UINT32_MAX;
2660
2661 cinfo.ifa_valid = valid;
2662 }
2663
2664 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2665
2666 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2667 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2668 }
2669
2670 return system_rtnl_call(msg);
2671 }
2672
2673 int system_add_address(struct device *dev, struct device_addr *addr)
2674 {
2675 return system_addr(dev, addr, RTM_NEWADDR);
2676 }
2677
2678 int system_del_address(struct device *dev, struct device_addr *addr)
2679 {
2680 return system_addr(dev, addr, RTM_DELADDR);
2681 }
2682
2683 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2684 {
2685 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2686 unsigned int flags = 0;
2687 struct ndmsg ndm = {
2688 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2689 .ndm_ifindex = dev->ifindex,
2690 .ndm_state = NUD_PERMANENT,
2691 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2692 };
2693 struct nl_msg *msg;
2694
2695 if (cmd == RTM_NEWNEIGH)
2696 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2697
2698 msg = nlmsg_alloc_simple(cmd, flags);
2699
2700 if (!msg)
2701 return -1;
2702
2703 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2704
2705 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2706 if (neighbor->flags & DEVNEIGH_MAC)
2707 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2708
2709
2710 return system_rtnl_call(msg);
2711 }
2712
2713 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2714 {
2715 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2716 }
2717
2718 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2719 {
2720 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2721 }
2722
2723 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2724 {
2725 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2726 bool have_gw;
2727 unsigned int flags = 0;
2728
2729 if (alen == 4)
2730 have_gw = !!route->nexthop.in.s_addr;
2731 else
2732 have_gw = route->nexthop.in6.s6_addr32[0] ||
2733 route->nexthop.in6.s6_addr32[1] ||
2734 route->nexthop.in6.s6_addr32[2] ||
2735 route->nexthop.in6.s6_addr32[3];
2736
2737 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2738 ? route->table : RT_TABLE_MAIN;
2739
2740 struct rtmsg rtm = {
2741 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2742 .rtm_dst_len = route->mask,
2743 .rtm_src_len = route->sourcemask,
2744 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2745 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2746 .rtm_scope = RT_SCOPE_NOWHERE,
2747 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2748 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2749 };
2750 struct nl_msg *msg;
2751
2752 if (cmd == RTM_NEWROUTE) {
2753 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2754
2755 if (!dev) { /* Add null-route */
2756 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2757 rtm.rtm_type = RTN_UNREACHABLE;
2758 }
2759 else
2760 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2761 }
2762
2763 if (route->flags & DEVROUTE_TYPE) {
2764 rtm.rtm_type = route->type;
2765 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2766 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2767 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2768 rtm.rtm_table = RT_TABLE_LOCAL;
2769 }
2770
2771 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2772 rtm.rtm_scope = RT_SCOPE_HOST;
2773 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2774 rtm.rtm_type == RTN_ANYCAST) {
2775 rtm.rtm_scope = RT_SCOPE_LINK;
2776 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2777 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2778 rtm.rtm_type == RTN_THROW) {
2779 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2780 dev = NULL;
2781 }
2782 }
2783
2784 msg = nlmsg_alloc_simple(cmd, flags);
2785 if (!msg)
2786 return -1;
2787
2788 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2789
2790 if (route->mask)
2791 nla_put(msg, RTA_DST, alen, &route->addr);
2792
2793 if (route->sourcemask) {
2794 if (rtm.rtm_family == AF_INET)
2795 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2796 else
2797 nla_put(msg, RTA_SRC, alen, &route->source);
2798 }
2799
2800 if (route->metric > 0)
2801 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2802
2803 if (have_gw)
2804 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2805
2806 if (dev)
2807 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2808
2809 if (table >= 256)
2810 nla_put_u32(msg, RTA_TABLE, table);
2811
2812 if (route->flags & DEVROUTE_MTU) {
2813 struct nlattr *metrics;
2814
2815 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2816 goto nla_put_failure;
2817
2818 nla_put_u32(msg, RTAX_MTU, route->mtu);
2819
2820 nla_nest_end(msg, metrics);
2821 }
2822
2823 return system_rtnl_call(msg);
2824
2825 nla_put_failure:
2826 nlmsg_free(msg);
2827 return -ENOMEM;
2828 }
2829
2830 int system_add_route(struct device *dev, struct device_route *route)
2831 {
2832 return system_rt(dev, route, RTM_NEWROUTE);
2833 }
2834
2835 int system_del_route(struct device *dev, struct device_route *route)
2836 {
2837 return system_rt(dev, route, RTM_DELROUTE);
2838 }
2839
2840 int system_flush_routes(void)
2841 {
2842 const char *names[] = { "ipv4", "ipv6" };
2843 size_t i;
2844 int fd;
2845
2846 for (i = 0; i < ARRAY_SIZE(names); i++) {
2847 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2848 fd = open(dev_buf, O_WRONLY);
2849 if (fd < 0)
2850 continue;
2851
2852 if (write(fd, "-1", 2)) {}
2853 close(fd);
2854 }
2855 return 0;
2856 }
2857
2858 bool system_resolve_rt_type(const char *type, unsigned int *id)
2859 {
2860 return system_rtn_aton(type, id);
2861 }
2862
2863 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2864 {
2865 FILE *f;
2866 char *e, buf[128];
2867 unsigned int n, proto = 256;
2868 n = strtoul(type, &e, 0);
2869 if (!*e && e != type)
2870 proto = n;
2871 else if (!strcmp(type, "unspec"))
2872 proto = RTPROT_UNSPEC;
2873 else if (!strcmp(type, "kernel"))
2874 proto = RTPROT_KERNEL;
2875 else if (!strcmp(type, "boot"))
2876 proto = RTPROT_BOOT;
2877 else if (!strcmp(type, "static"))
2878 proto = RTPROT_STATIC;
2879 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2880 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2881 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2882 continue;
2883
2884 n = strtoul(e, NULL, 10);
2885 e = strtok(NULL, " \t\n");
2886
2887 if (e && !strcmp(e, type)) {
2888 proto = n;
2889 break;
2890 }
2891 }
2892 fclose(f);
2893 }
2894
2895 if (proto > 255)
2896 return false;
2897
2898 *id = proto;
2899 return true;
2900 }
2901
2902 bool system_resolve_rt_table(const char *name, unsigned int *id)
2903 {
2904 FILE *f;
2905 char *e, buf[128];
2906 unsigned int n, table = RT_TABLE_UNSPEC;
2907
2908 /* first try to parse table as number */
2909 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2910 table = n;
2911
2912 /* handle well known aliases */
2913 else if (!strcmp(name, "default"))
2914 table = RT_TABLE_DEFAULT;
2915 else if (!strcmp(name, "main"))
2916 table = RT_TABLE_MAIN;
2917 else if (!strcmp(name, "local"))
2918 table = RT_TABLE_LOCAL;
2919
2920 /* try to look up name in /etc/iproute2/rt_tables */
2921 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2922 {
2923 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2924 {
2925 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2926 continue;
2927
2928 n = strtoul(e, NULL, 10);
2929 e = strtok(NULL, " \t\n");
2930
2931 if (e && !strcmp(e, name))
2932 {
2933 table = n;
2934 break;
2935 }
2936 }
2937
2938 fclose(f);
2939 }
2940
2941 if (table == RT_TABLE_UNSPEC)
2942 return false;
2943
2944 *id = table;
2945 return true;
2946 }
2947
2948 bool system_is_default_rt_table(unsigned int id)
2949 {
2950 return (id == RT_TABLE_MAIN);
2951 }
2952
2953 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2954 {
2955 char *e;
2956 unsigned int n;
2957
2958 if (!strcmp(filter, "strict"))
2959 n = 1;
2960 else if (!strcmp(filter, "loose"))
2961 n = 2;
2962 else {
2963 n = strtoul(filter, &e, 0);
2964 if (*e || e == filter || n > 2)
2965 return false;
2966 }
2967
2968 *id = n;
2969 return true;
2970 }
2971
2972 static int system_iprule(struct iprule *rule, int cmd)
2973 {
2974 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2975
2976 struct nl_msg *msg;
2977 struct rtmsg rtm = {
2978 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2979 .rtm_protocol = RTPROT_STATIC,
2980 .rtm_scope = RT_SCOPE_UNIVERSE,
2981 .rtm_table = RT_TABLE_UNSPEC,
2982 .rtm_type = RTN_UNSPEC,
2983 .rtm_flags = 0,
2984 };
2985
2986 if (cmd == RTM_NEWRULE)
2987 rtm.rtm_type = RTN_UNICAST;
2988
2989 if (rule->invert)
2990 rtm.rtm_flags |= FIB_RULE_INVERT;
2991
2992 if (rule->flags & IPRULE_SRC)
2993 rtm.rtm_src_len = rule->src_mask;
2994
2995 if (rule->flags & IPRULE_DEST)
2996 rtm.rtm_dst_len = rule->dest_mask;
2997
2998 if (rule->flags & IPRULE_TOS)
2999 rtm.rtm_tos = rule->tos;
3000
3001 if (rule->flags & IPRULE_LOOKUP) {
3002 if (rule->lookup < 256)
3003 rtm.rtm_table = rule->lookup;
3004 }
3005
3006 if (rule->flags & IPRULE_ACTION)
3007 rtm.rtm_type = rule->action;
3008 else if (rule->flags & IPRULE_GOTO)
3009 rtm.rtm_type = FR_ACT_GOTO;
3010 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3011 rtm.rtm_type = FR_ACT_NOP;
3012
3013 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3014
3015 if (!msg)
3016 return -1;
3017
3018 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3019
3020 if (rule->flags & IPRULE_IN)
3021 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3022
3023 if (rule->flags & IPRULE_OUT)
3024 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3025
3026 if (rule->flags & IPRULE_SRC)
3027 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3028
3029 if (rule->flags & IPRULE_DEST)
3030 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3031
3032 if (rule->flags & IPRULE_PRIORITY)
3033 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3034 else if (cmd == RTM_NEWRULE)
3035 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3036
3037 if (rule->flags & IPRULE_FWMARK)
3038 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3039
3040 if (rule->flags & IPRULE_FWMASK)
3041 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3042
3043 if (rule->flags & IPRULE_LOOKUP) {
3044 if (rule->lookup >= 256)
3045 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3046 }
3047
3048 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3049 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3050
3051 if (rule->flags & IPRULE_UIDRANGE) {
3052 struct fib_rule_uid_range uidrange = {
3053 .start = rule->uidrange_start,
3054 .end = rule->uidrange_end
3055 };
3056
3057 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3058 }
3059
3060 if (rule->flags & IPRULE_GOTO)
3061 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3062
3063 return system_rtnl_call(msg);
3064 }
3065
3066 int system_add_iprule(struct iprule *rule)
3067 {
3068 return system_iprule(rule, RTM_NEWRULE);
3069 }
3070
3071 int system_del_iprule(struct iprule *rule)
3072 {
3073 return system_iprule(rule, RTM_DELRULE);
3074 }
3075
3076 int system_flush_iprules(void)
3077 {
3078 int rv = 0;
3079 struct iprule rule;
3080
3081 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3082 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3083
3084 memset(&rule, 0, sizeof(rule));
3085
3086
3087 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3088
3089 rule.priority = 0;
3090 rule.lookup = RT_TABLE_LOCAL;
3091 rv |= system_iprule(&rule, RTM_NEWRULE);
3092
3093 rule.priority = 32766;
3094 rule.lookup = RT_TABLE_MAIN;
3095 rv |= system_iprule(&rule, RTM_NEWRULE);
3096
3097 rule.priority = 32767;
3098 rule.lookup = RT_TABLE_DEFAULT;
3099 rv |= system_iprule(&rule, RTM_NEWRULE);
3100
3101
3102 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3103
3104 rule.priority = 0;
3105 rule.lookup = RT_TABLE_LOCAL;
3106 rv |= system_iprule(&rule, RTM_NEWRULE);
3107
3108 rule.priority = 32766;
3109 rule.lookup = RT_TABLE_MAIN;
3110 rv |= system_iprule(&rule, RTM_NEWRULE);
3111
3112 return rv;
3113 }
3114
3115 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3116 {
3117 return system_rtn_aton(action, id);
3118 }
3119
3120 time_t system_get_rtime(void)
3121 {
3122 struct timespec ts;
3123 struct timeval tv;
3124
3125 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3126 return ts.tv_sec;
3127
3128 if (gettimeofday(&tv, NULL) == 0)
3129 return tv.tv_sec;
3130
3131 return 0;
3132 }
3133
3134 #ifndef IP_DF
3135 #define IP_DF 0x4000
3136 #endif
3137
3138 static int tunnel_ioctl(const char *name, int cmd, void *p)
3139 {
3140 struct ifreq ifr;
3141
3142 memset(&ifr, 0, sizeof(ifr));
3143 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3144 ifr.ifr_ifru.ifru_data = p;
3145 return ioctl(sock_ioctl, cmd, &ifr);
3146 }
3147
3148 #ifdef IFLA_IPTUN_MAX
3149 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3150 struct blob_attr **tb)
3151 {
3152 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3153 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3154 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3155 struct blob_attr *cur;
3156 int ret = 0, ttl = 0;
3157
3158 if (!nlm)
3159 return -1;
3160
3161 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3162 nla_put_string(nlm, IFLA_IFNAME, name);
3163
3164 if (link)
3165 nla_put_u32(nlm, IFLA_LINK, link);
3166
3167 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3168 if (!linkinfo) {
3169 ret = -ENOMEM;
3170 goto failure;
3171 }
3172
3173 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3174 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3175 if (!infodata) {
3176 ret = -ENOMEM;
3177 goto failure;
3178 }
3179
3180 if (link)
3181 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3182
3183 if ((cur = tb[TUNNEL_ATTR_TTL]))
3184 ttl = blobmsg_get_u32(cur);
3185
3186 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3187 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3188
3189 struct in6_addr in6buf;
3190 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3191 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3192 ret = -EINVAL;
3193 goto failure;
3194 }
3195 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3196 }
3197
3198 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3199 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3200 ret = -EINVAL;
3201 goto failure;
3202 }
3203 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3204 }
3205
3206 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3207 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3208 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3209
3210 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3211 blobmsg_data(cur), blobmsg_len(cur));
3212
3213 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3214 char *str = blobmsg_get_string(cur);
3215
3216 if (strcmp(str, "ignore")) {
3217 char *e;
3218 unsigned encap_limit = strtoul(str, &e, 0);
3219
3220 if (e == str || *e || encap_limit > 255) {
3221 ret = -EINVAL;
3222 goto failure;
3223 }
3224
3225 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3226 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3227 }
3228 }
3229
3230 #ifdef IFLA_IPTUN_FMR_MAX
3231 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3232 struct blob_attr *rcur;
3233 unsigned rrem, fmrcnt = 0;
3234 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3235
3236 if (!fmrs) {
3237 ret = -ENOMEM;
3238 goto failure;
3239 }
3240
3241 blobmsg_for_each_attr(rcur, cur, rrem) {
3242 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3243 struct in6_addr ip6prefix;
3244 struct in_addr ip4prefix;
3245 unsigned ip4len, ip6len, ealen, offset;
3246
3247 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3248 blobmsg_data(rcur), blobmsg_len(rcur));
3249
3250 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3251 !parse_ip_and_netmask(AF_INET6,
3252 blobmsg_data(tb_cur), &ip6prefix,
3253 &ip6len)) {
3254 ret = -EINVAL;
3255 goto failure;
3256 }
3257
3258 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3259 !parse_ip_and_netmask(AF_INET,
3260 blobmsg_data(tb_cur), &ip4prefix,
3261 &ip4len)) {
3262 ret = -EINVAL;
3263 goto failure;
3264 }
3265
3266 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3267 ret = -EINVAL;
3268 goto failure;
3269 }
3270 ealen = blobmsg_get_u32(tb_cur);
3271
3272 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3273 ret = -EINVAL;
3274 goto failure;
3275 }
3276 offset = blobmsg_get_u32(tb_cur);
3277
3278 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3279 if (!rule) {
3280 ret = -ENOMEM;
3281 goto failure;
3282 }
3283
3284 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3285 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3286 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3287 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3288 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3289 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3290
3291 nla_nest_end(nlm, rule);
3292 }
3293
3294 nla_nest_end(nlm, fmrs);
3295 }
3296 #endif
3297 if (tun_flags)
3298 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3299 }
3300
3301 nla_nest_end(nlm, infodata);
3302 nla_nest_end(nlm, linkinfo);
3303
3304 return system_rtnl_call(nlm);
3305
3306 failure:
3307 nlmsg_free(nlm);
3308 return ret;
3309 }
3310 #endif
3311
3312 #ifdef IFLA_IPTUN_MAX
3313 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3314 static int system_add_gre_tunnel(const char *name, const char *kind,
3315 const unsigned int link, struct blob_attr **tb, bool v6)
3316 {
3317 struct nl_msg *nlm;
3318 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3319 struct blob_attr *cur;
3320 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3321 uint16_t iflags = 0, oflags = 0;
3322 uint8_t tos = 0;
3323 int ret = 0, ttl = 0;
3324 unsigned encap_limit = 0;
3325
3326 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3327 if (!nlm)
3328 return -1;
3329
3330 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3331 nla_put_string(nlm, IFLA_IFNAME, name);
3332
3333 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3334 if (!linkinfo) {
3335 ret = -ENOMEM;
3336 goto failure;
3337 }
3338
3339 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3340 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3341 if (!infodata) {
3342 ret = -ENOMEM;
3343 goto failure;
3344 }
3345
3346 if (link)
3347 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3348
3349 if ((cur = tb[TUNNEL_ATTR_TTL]))
3350 ttl = blobmsg_get_u32(cur);
3351
3352 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3353 char *str = blobmsg_get_string(cur);
3354 if (strcmp(str, "inherit")) {
3355 unsigned uval;
3356
3357 if (!system_tos_aton(str, &uval)) {
3358 ret = -EINVAL;
3359 goto failure;
3360 }
3361
3362 if (v6)
3363 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3364 else
3365 tos = uval;
3366 } else {
3367 if (v6)
3368 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3369 else
3370 tos = 1;
3371 }
3372 }
3373
3374 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3375 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3376
3377 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3378 blobmsg_data(cur), blobmsg_len(cur));
3379
3380 if ((cur = tb_data[GRE_DATA_IKEY])) {
3381 if ((ikey = blobmsg_get_u32(cur)))
3382 iflags |= GRE_KEY;
3383 }
3384
3385 if ((cur = tb_data[GRE_DATA_OKEY])) {
3386 if ((okey = blobmsg_get_u32(cur)))
3387 oflags |= GRE_KEY;
3388 }
3389
3390 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3391 if (blobmsg_get_bool(cur))
3392 iflags |= GRE_CSUM;
3393 }
3394
3395 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3396 if (blobmsg_get_bool(cur))
3397 oflags |= GRE_CSUM;
3398 }
3399
3400 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3401 if (blobmsg_get_bool(cur))
3402 iflags |= GRE_SEQ;
3403 }
3404
3405 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3406 if (blobmsg_get_bool(cur))
3407 oflags |= GRE_SEQ;
3408 }
3409
3410 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3411 char *str = blobmsg_get_string(cur);
3412
3413 if (strcmp(str, "ignore")) {
3414 char *e;
3415
3416 encap_limit = strtoul(str, &e, 0);
3417
3418 if (e == str || *e || encap_limit > 255) {
3419 ret = -EINVAL;
3420 goto failure;
3421 }
3422
3423 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3424 }
3425 }
3426 }
3427
3428 if (v6) {
3429 struct in6_addr in6buf;
3430 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3431 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3432 ret = -EINVAL;
3433 goto failure;
3434 }
3435 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3436 }
3437
3438 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3439 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3440 ret = -EINVAL;
3441 goto failure;
3442 }
3443 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3444 }
3445
3446 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3447 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3448
3449 if (flowinfo)
3450 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3451
3452 if (flags6)
3453 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3454
3455 if (!ttl)
3456 ttl = 64;
3457 } else {
3458 struct in_addr inbuf;
3459 bool set_df = true;
3460
3461 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3462 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3463 ret = -EINVAL;
3464 goto failure;
3465 }
3466 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3467 }
3468
3469 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3470 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3471 ret = -EINVAL;
3472 goto failure;
3473 }
3474 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3475
3476 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3477 if (!okey) {
3478 okey = inbuf.s_addr;
3479 oflags |= GRE_KEY;
3480 }
3481
3482 if (!ikey) {
3483 ikey = inbuf.s_addr;
3484 iflags |= GRE_KEY;
3485 }
3486 }
3487 }
3488
3489 if ((cur = tb[TUNNEL_ATTR_DF]))
3490 set_df = blobmsg_get_bool(cur);
3491
3492 if (!set_df) {
3493 /* ttl != 0 and nopmtudisc are incompatible */
3494 if (ttl) {
3495 ret = -EINVAL;
3496 goto failure;
3497 }
3498 } else if (!ttl)
3499 ttl = 64;
3500
3501 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3502
3503 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3504 }
3505
3506 if (ttl)
3507 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3508
3509 if (oflags)
3510 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3511
3512 if (iflags)
3513 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3514
3515 if (okey)
3516 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3517
3518 if (ikey)
3519 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3520
3521 nla_nest_end(nlm, infodata);
3522 nla_nest_end(nlm, linkinfo);
3523
3524 return system_rtnl_call(nlm);
3525
3526 failure:
3527 nlmsg_free(nlm);
3528 return ret;
3529 }
3530 #endif
3531
3532 #ifdef IFLA_VTI_MAX
3533 static int system_add_vti_tunnel(const char *name, const char *kind,
3534 const unsigned int link, struct blob_attr **tb, bool v6)
3535 {
3536 struct nl_msg *nlm;
3537 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3538 struct blob_attr *cur;
3539 int ret = 0;
3540
3541 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3542 if (!nlm)
3543 return -1;
3544
3545 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3546 nla_put_string(nlm, IFLA_IFNAME, name);
3547
3548 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3549 if (!linkinfo) {
3550 ret = -ENOMEM;
3551 goto failure;
3552 }
3553
3554 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3555 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3556 if (!infodata) {
3557 ret = -ENOMEM;
3558 goto failure;
3559 }
3560
3561 if (link)
3562 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3563
3564 if (v6) {
3565 struct in6_addr in6buf;
3566 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3567 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3568 ret = -EINVAL;
3569 goto failure;
3570 }
3571 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3572 }
3573
3574 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3575 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3576 ret = -EINVAL;
3577 goto failure;
3578 }
3579 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3580 }
3581
3582 } else {
3583 struct in_addr inbuf;
3584
3585 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3586 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3587 ret = -EINVAL;
3588 goto failure;
3589 }
3590 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3591 }
3592
3593 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3594 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3595 ret = -EINVAL;
3596 goto failure;
3597 }
3598 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3599 }
3600
3601 }
3602
3603 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3604 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3605 uint32_t ikey = 0, okey = 0;
3606
3607 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3608 blobmsg_data(cur), blobmsg_len(cur));
3609
3610 if ((cur = tb_data[VTI_DATA_IKEY])) {
3611 if ((ikey = blobmsg_get_u32(cur)))
3612 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3613 }
3614
3615 if ((cur = tb_data[VTI_DATA_OKEY])) {
3616 if ((okey = blobmsg_get_u32(cur)))
3617 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3618 }
3619 }
3620
3621 nla_nest_end(nlm, infodata);
3622 nla_nest_end(nlm, linkinfo);
3623
3624 return system_rtnl_call(nlm);
3625
3626 failure:
3627 nlmsg_free(nlm);
3628 return ret;
3629 }
3630 #endif
3631
3632 #ifdef IFLA_XFRM_MAX
3633 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3634 const unsigned int link, struct blob_attr **tb)
3635 {
3636 struct nl_msg *nlm;
3637 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3638 struct blob_attr *cur;
3639 int ret = 0;
3640
3641 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3642 if (!nlm)
3643 return -1;
3644
3645 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3646 nla_put_string(nlm, IFLA_IFNAME, name);
3647
3648 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3649 if (!linkinfo) {
3650 ret = -ENOMEM;
3651 goto failure;
3652 }
3653
3654 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3655 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3656 if (!infodata) {
3657 ret = -ENOMEM;
3658 goto failure;
3659 }
3660
3661 if (link)
3662 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3663
3664 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3665 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3666 uint32_t if_id = 0;
3667
3668 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3669 blobmsg_data(cur), blobmsg_len(cur));
3670
3671 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3672 if ((if_id = blobmsg_get_u32(cur)))
3673 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3674 }
3675
3676 }
3677
3678 nla_nest_end(nlm, infodata);
3679 nla_nest_end(nlm, linkinfo);
3680
3681 return system_rtnl_call(nlm);
3682
3683 failure:
3684 nlmsg_free(nlm);
3685 return ret;
3686 }
3687 #endif
3688
3689 #ifdef IFLA_VXLAN_MAX
3690 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3691 struct blob_attr *cur;
3692 if ((cur = tb_data[vxlandatatype])) {
3693 bool val = blobmsg_get_bool(cur);
3694 if (invert)
3695 val = !val;
3696
3697 if ((attrtype == IFLA_VXLAN_GBP) && val)
3698 nla_put_flag(msg, attrtype);
3699 else
3700 nla_put_u8(msg, attrtype, val);
3701
3702 }
3703 }
3704
3705 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3706 {
3707 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3708 struct nl_msg *msg;
3709 struct nlattr *linkinfo, *data;
3710 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3711 struct blob_attr *cur;
3712 int ret = 0;
3713
3714 if ((cur = tb[TUNNEL_ATTR_DATA]))
3715 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3716 blobmsg_data(cur), blobmsg_len(cur));
3717 else
3718 return -EINVAL;
3719
3720 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3721
3722 if (!msg)
3723 return -1;
3724
3725 nlmsg_append(msg, &iim, sizeof(iim), 0);
3726
3727 nla_put_string(msg, IFLA_IFNAME, name);
3728
3729 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3730 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3731 if (!ea) {
3732 ret = -EINVAL;
3733 goto failure;
3734 }
3735
3736 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3737 }
3738
3739 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3740 uint32_t mtu = blobmsg_get_u32(cur);
3741 nla_put_u32(msg, IFLA_MTU, mtu);
3742 }
3743
3744 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3745 ret = -ENOMEM;
3746 goto failure;
3747 }
3748
3749 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3750
3751 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3752 ret = -ENOMEM;
3753 goto failure;
3754 }
3755
3756 if (link)
3757 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3758
3759 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3760 uint32_t id = blobmsg_get_u32(cur);
3761 if (id >= (1u << 24) - 1) {
3762 ret = -EINVAL;
3763 goto failure;
3764 }
3765
3766 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3767 }
3768
3769 if (v6) {
3770 struct in6_addr in6buf;
3771 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3772 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3773 ret = -EINVAL;
3774 goto failure;
3775 }
3776 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3777 }
3778
3779 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3780 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3781 ret = -EINVAL;
3782 goto failure;
3783 }
3784 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3785 }
3786 } else {
3787 struct in_addr inbuf;
3788
3789 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3790 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3791 ret = -EINVAL;
3792 goto failure;
3793 }
3794 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3795 }
3796
3797 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3798 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3799 ret = -EINVAL;
3800 goto failure;
3801 }
3802 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3803 }
3804 }
3805
3806 uint32_t port = 4789;
3807 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3808 port = blobmsg_get_u32(cur);
3809 if (port < 1 || port > 65535) {
3810 ret = -EINVAL;
3811 goto failure;
3812 }
3813 }
3814 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3815
3816 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3817 struct ifla_vxlan_port_range srcports = {0,0};
3818
3819 uint32_t low = blobmsg_get_u32(cur);
3820 if (low < 1 || low > 65535 - 1) {
3821 ret = -EINVAL;
3822 goto failure;
3823 }
3824
3825 srcports.low = htons((uint16_t) low);
3826 srcports.high = htons((uint16_t) (low+1));
3827
3828 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3829 uint32_t high = blobmsg_get_u32(cur);
3830 if (high < 1 || high > 65535) {
3831 ret = -EINVAL;
3832 goto failure;
3833 }
3834
3835 if (high > low)
3836 srcports.high = htons((uint16_t) high);
3837 }
3838
3839 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3840 }
3841
3842 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3843 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3844 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3845 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3846 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3847 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3848 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3849 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3850 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3851
3852 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3853 uint32_t ageing = blobmsg_get_u32(cur);
3854 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3855 }
3856
3857 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3858 uint32_t maxaddress = blobmsg_get_u32(cur);
3859 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3860 }
3861
3862 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3863 char *str = blobmsg_get_string(cur);
3864 unsigned tos = 1;
3865
3866 if (strcmp(str, "inherit")) {
3867 if (!system_tos_aton(str, &tos)) {
3868 ret = -EINVAL;
3869 goto failure;
3870 }
3871 }
3872
3873 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3874 }
3875
3876 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3877 uint32_t ttl = blobmsg_get_u32(cur);
3878 if (ttl < 1 || ttl > 255) {
3879 ret = -EINVAL;
3880 goto failure;
3881 }
3882
3883 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3884 }
3885
3886 nla_nest_end(msg, data);
3887 nla_nest_end(msg, linkinfo);
3888
3889 ret = system_rtnl_call(msg);
3890 if (ret)
3891 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3892
3893 return ret;
3894
3895 failure:
3896 nlmsg_free(msg);
3897 return ret;
3898 }
3899 #endif
3900
3901 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3902 {
3903 struct blob_attr *cur;
3904 int ret = 0;
3905
3906 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3907 return -1;
3908
3909 #ifdef SIOCADD6RD
3910 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3911 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3912 unsigned int mask;
3913 struct ip_tunnel_6rd p6;
3914
3915 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3916 blobmsg_data(cur), blobmsg_len(cur));
3917
3918 memset(&p6, 0, sizeof(p6));
3919
3920 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3921 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3922 &p6.prefix, &mask) || mask > 128) {
3923 ret = -EINVAL;
3924 goto failure;
3925 }
3926
3927 p6.prefixlen = mask;
3928 }
3929
3930 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3931 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3932 &p6.relay_prefix, &mask) || mask > 32) {
3933 ret = -EINVAL;
3934 goto failure;
3935 }
3936
3937 p6.relay_prefixlen = mask;
3938 }
3939
3940 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3941 ret = -1;
3942 goto failure;
3943 }
3944 }
3945 #endif
3946
3947 return ret;
3948
3949 failure:
3950 system_link_del(name);
3951 return ret;
3952 }
3953
3954 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3955 {
3956 struct blob_attr *cur;
3957 bool set_df = true;
3958 struct ip_tunnel_parm p = {
3959 .link = link,
3960 .iph = {
3961 .version = 4,
3962 .ihl = 5,
3963 .protocol = proto,
3964 }
3965 };
3966
3967 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3968 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3969 return -EINVAL;
3970
3971 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3972 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3973 return -EINVAL;
3974
3975 if ((cur = tb[TUNNEL_ATTR_DF]))
3976 set_df = blobmsg_get_bool(cur);
3977
3978 if ((cur = tb[TUNNEL_ATTR_TTL]))
3979 p.iph.ttl = blobmsg_get_u32(cur);
3980
3981 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3982 char *str = blobmsg_get_string(cur);
3983 if (strcmp(str, "inherit")) {
3984 unsigned uval;
3985
3986 if (!system_tos_aton(str, &uval))
3987 return -EINVAL;
3988
3989 p.iph.tos = uval;
3990 } else
3991 p.iph.tos = 1;
3992 }
3993
3994 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3995 /* ttl !=0 and nopmtudisc are incompatible */
3996 if (p.iph.ttl && p.iph.frag_off == 0)
3997 return -EINVAL;
3998
3999 strncpy(p.name, name, sizeof(p.name) - 1);
4000
4001 switch (p.iph.protocol) {
4002 case IPPROTO_IPIP:
4003 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4004 case IPPROTO_IPV6:
4005 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4006 default:
4007 break;
4008 }
4009 return -1;
4010 }
4011
4012 int system_del_ip_tunnel(const struct device *dev)
4013 {
4014 return system_link_del(dev->ifname);
4015 }
4016
4017 int system_update_ipv6_mtu(struct device *dev, int mtu)
4018 {
4019 int ret = -1;
4020 char buf[64];
4021 int fd;
4022
4023 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4024 if (fd < 0)
4025 return ret;
4026
4027 if (!mtu) {
4028 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4029 if (len < 0)
4030 goto out;
4031
4032 buf[len] = 0;
4033 ret = atoi(buf);
4034 } else {
4035 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4036 ret = mtu;
4037 }
4038
4039 out:
4040 close(fd);
4041 return ret;
4042 }
4043
4044 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4045 {
4046 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4047 struct blob_attr *cur;
4048 const char *str;
4049
4050 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4051 blob_data(attr), blob_len(attr));
4052
4053 system_link_del(dev->ifname);
4054
4055 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4056 return -EINVAL;
4057 str = blobmsg_data(cur);
4058
4059 unsigned int ttl = 0;
4060 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4061 ttl = blobmsg_get_u32(cur);
4062 if (ttl > 255)
4063 return -EINVAL;
4064 }
4065
4066 unsigned int link = 0;
4067 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4068 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4069 if (!iface)
4070 return -EINVAL;
4071
4072 if (iface->l3_dev.dev)
4073 link = iface->l3_dev.dev->ifindex;
4074 }
4075
4076 if (!strcmp(str, "sit"))
4077 return system_add_sit_tunnel(dev->ifname, link, tb);
4078 #ifdef IFLA_IPTUN_MAX
4079 else if (!strcmp(str, "ipip6")) {
4080 return system_add_ip6_tunnel(dev->ifname, link, tb);
4081 } else if (!strcmp(str, "greip")) {
4082 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4083 } else if (!strcmp(str, "gretapip")) {
4084 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4085 } else if (!strcmp(str, "greip6")) {
4086 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4087 } else if (!strcmp(str, "gretapip6")) {
4088 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4089 #ifdef IFLA_VTI_MAX
4090 } else if (!strcmp(str, "vtiip")) {
4091 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4092 } else if (!strcmp(str, "vtiip6")) {
4093 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4094 #endif
4095 #ifdef IFLA_XFRM_MAX
4096 } else if (!strcmp(str, "xfrm")) {
4097 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4098 #endif
4099 #ifdef IFLA_VXLAN_MAX
4100 } else if(!strcmp(str, "vxlan")) {
4101 return system_add_vxlan(dev->ifname, link, tb, false);
4102 } else if(!strcmp(str, "vxlan6")) {
4103 return system_add_vxlan(dev->ifname, link, tb, true);
4104 #endif
4105 #endif
4106 } else if (!strcmp(str, "ipip")) {
4107 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4108 }
4109 else
4110 return -EINVAL;
4111
4112 return 0;
4113 }
OpenWrt Network interface configuration daemon