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device: add support to configure eee
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/in.h>
32 #include <netinet/ether.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #include "ethtool-modes.h"
52
53 #ifndef RTN_FAILED_POLICY
54 #define RTN_FAILED_POLICY 12
55 #endif
56
57 #ifndef IFA_F_NOPREFIXROUTE
58 #define IFA_F_NOPREFIXROUTE 0x200
59 #endif
60
61 #ifndef IFA_FLAGS
62 #define IFA_FLAGS (IFA_MULTICAST + 1)
63 #endif
64
65 #include <string.h>
66 #include <fcntl.h>
67 #include <glob.h>
68 #include <time.h>
69 #include <unistd.h>
70
71 #include <netlink/msg.h>
72 #include <netlink/attr.h>
73 #include <netlink/socket.h>
74 #include <libubox/uloop.h>
75
76 #include "netifd.h"
77 #include "device.h"
78 #include "system.h"
79 #include "utils.h"
80
81 struct event_socket {
82 struct uloop_fd uloop;
83 struct nl_sock *sock;
84 int bufsize;
85 };
86
87 static int sock_ioctl = -1;
88 static struct nl_sock *sock_rtnl = NULL;
89
90 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
91 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
92 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
93 const unsigned int link, struct blob_attr **tb);
94
95 static char dev_buf[256];
96 static const char *proc_path = "/proc";
97 static const char *sysfs_path = "/sys";
98
99 struct netdev_type {
100 unsigned short id;
101 const char *name;
102 };
103
104 static const struct netdev_type netdev_types[] = {
105 {ARPHRD_NETROM, "netrom"},
106 {ARPHRD_ETHER, "ethernet"},
107 {ARPHRD_EETHER, "eethernet"},
108 {ARPHRD_AX25, "ax25"},
109 {ARPHRD_PRONET, "pronet"},
110 {ARPHRD_CHAOS, "chaos"},
111 {ARPHRD_IEEE802, "ieee802"},
112 {ARPHRD_ARCNET, "arcnet"},
113 {ARPHRD_APPLETLK, "appletlk"},
114 {ARPHRD_DLCI, "dlci"},
115 {ARPHRD_ATM, "atm"},
116 {ARPHRD_METRICOM, "metricom"},
117 {ARPHRD_IEEE1394, "ieee1394"},
118 {ARPHRD_EUI64, "eui64"},
119 {ARPHRD_INFINIBAND, "infiniband"},
120 {ARPHRD_SLIP, "slip"},
121 {ARPHRD_CSLIP, "cslip"},
122 {ARPHRD_SLIP6, "slip6"},
123 {ARPHRD_CSLIP6, "cslip6"},
124 {ARPHRD_RSRVD, "rsrvd"},
125 {ARPHRD_ADAPT, "adapt"},
126 {ARPHRD_ROSE, "rose"},
127 {ARPHRD_X25, "x25"},
128 {ARPHRD_HWX25, "hwx25"},
129 {ARPHRD_PPP, "ppp"},
130 {ARPHRD_CISCO, "cisco"},
131 {ARPHRD_LAPB, "lapb"},
132 {ARPHRD_DDCMP, "ddcmp"},
133 {ARPHRD_RAWHDLC, "rawhdlc"},
134 {ARPHRD_TUNNEL, "tunnel"},
135 {ARPHRD_TUNNEL6, "tunnel6"},
136 {ARPHRD_FRAD, "frad"},
137 {ARPHRD_SKIP, "skip"},
138 {ARPHRD_LOOPBACK, "loopback"},
139 {ARPHRD_LOCALTLK, "localtlk"},
140 {ARPHRD_FDDI, "fddi"},
141 {ARPHRD_BIF, "bif"},
142 {ARPHRD_SIT, "sit"},
143 {ARPHRD_IPDDP, "ipddp"},
144 {ARPHRD_IPGRE, "ipgre"},
145 {ARPHRD_PIMREG,"pimreg"},
146 {ARPHRD_HIPPI, "hippi"},
147 {ARPHRD_ASH, "ash"},
148 {ARPHRD_ECONET, "econet"},
149 {ARPHRD_IRDA, "irda"},
150 {ARPHRD_FCPP, "fcpp"},
151 {ARPHRD_FCAL, "fcal"},
152 {ARPHRD_FCPL, "fcpl"},
153 {ARPHRD_FCFABRIC, "fcfabric"},
154 {ARPHRD_IEEE80211, "ieee80211"},
155 {ARPHRD_IEEE80211_PRISM, "ie80211-prism"},
156 {ARPHRD_IEEE80211_RADIOTAP, "ieee80211-radiotap"},
157 #ifdef ARPHRD_PHONET
158 {ARPHRD_PHONET, "phonet"},
159 #endif
160 #ifdef ARPHRD_PHONET_PIPE
161 {ARPHRD_PHONET_PIPE, "phonet-pipe"},
162 #endif
163 {ARPHRD_IEEE802154, "ieee802154"},
164 {ARPHRD_VOID, "void"},
165 {ARPHRD_NONE, "none"}
166 };
167
168 static void
169 handler_nl_event(struct uloop_fd *u, unsigned int events)
170 {
171 struct event_socket *ev = container_of(u, struct event_socket, uloop);
172 int err;
173 socklen_t errlen = sizeof(err);
174
175 if (!u->error) {
176 nl_recvmsgs_default(ev->sock);
177 return;
178 }
179
180 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
181 goto abort;
182
183 switch(err) {
184 case ENOBUFS:
185 /* Increase rx buffer size on netlink socket */
186 ev->bufsize *= 2;
187 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
188 goto abort;
189
190 /* Request full dump since some info got dropped */
191 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
192 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
193 break;
194
195 default:
196 goto abort;
197 }
198 u->error = false;
199 return;
200
201 abort:
202 uloop_fd_delete(&ev->uloop);
203 return;
204 }
205
206 static struct nl_sock *
207 create_socket(int protocol, int groups)
208 {
209 struct nl_sock *sock;
210
211 sock = nl_socket_alloc();
212 if (!sock)
213 return NULL;
214
215 if (groups)
216 nl_join_groups(sock, groups);
217
218 if (nl_connect(sock, protocol)) {
219 nl_socket_free(sock);
220 return NULL;
221 }
222
223 return sock;
224 }
225
226 static bool
227 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
228 uloop_fd_handler cb, int flags)
229 {
230 ev->sock = create_socket(protocol, groups);
231 if (!ev->sock)
232 return false;
233
234 ev->uloop.fd = nl_socket_get_fd(ev->sock);
235 ev->uloop.cb = cb;
236 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
237 return false;
238
239 return true;
240 }
241
242 static bool
243 create_event_socket(struct event_socket *ev, int protocol,
244 int (*cb)(struct nl_msg *msg, void *arg))
245 {
246 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
247 return false;
248
249 /* Install the valid custom callback handler */
250 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
251
252 /* Disable sequence number checking on event sockets */
253 nl_socket_disable_seq_check(ev->sock);
254
255 /* Increase rx buffer size to 65K on event sockets */
256 ev->bufsize = 65535;
257 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
258 return false;
259
260 return true;
261 }
262
263 static bool
264 create_hotplug_event_socket(struct event_socket *ev, int protocol,
265 void (*cb)(struct uloop_fd *u, unsigned int events))
266 {
267 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
268 return false;
269
270 /* Increase rx buffer size to 65K on event sockets */
271 ev->bufsize = 65535;
272 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
273 return false;
274
275 return true;
276 }
277
278 static bool
279 system_rtn_aton(const char *src, unsigned int *dst)
280 {
281 char *e;
282 unsigned int n;
283
284 if (!strcmp(src, "local"))
285 n = RTN_LOCAL;
286 else if (!strcmp(src, "nat"))
287 n = RTN_NAT;
288 else if (!strcmp(src, "broadcast"))
289 n = RTN_BROADCAST;
290 else if (!strcmp(src, "anycast"))
291 n = RTN_ANYCAST;
292 else if (!strcmp(src, "multicast"))
293 n = RTN_MULTICAST;
294 else if (!strcmp(src, "prohibit"))
295 n = RTN_PROHIBIT;
296 else if (!strcmp(src, "unreachable"))
297 n = RTN_UNREACHABLE;
298 else if (!strcmp(src, "blackhole"))
299 n = RTN_BLACKHOLE;
300 else if (!strcmp(src, "xresolve"))
301 n = RTN_XRESOLVE;
302 else if (!strcmp(src, "unicast"))
303 n = RTN_UNICAST;
304 else if (!strcmp(src, "throw"))
305 n = RTN_THROW;
306 else if (!strcmp(src, "failed_policy"))
307 n = RTN_FAILED_POLICY;
308 else {
309 n = strtoul(src, &e, 0);
310 if (!e || *e || e == src || n > 255)
311 return false;
312 }
313
314 *dst = n;
315 return true;
316 }
317
318 static bool
319 system_tos_aton(const char *src, unsigned *dst)
320 {
321 char *e;
322
323 *dst = strtoul(src, &e, 16);
324 if (e == src || *e || *dst > 255)
325 return false;
326
327 return true;
328 }
329
330 int system_init(void)
331 {
332 static struct event_socket rtnl_event;
333 static struct event_socket hotplug_event;
334
335 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
336 system_fd_set_cloexec(sock_ioctl);
337
338 /* Prepare socket for routing / address control */
339 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
340 if (!sock_rtnl)
341 return -1;
342
343 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
344 return -1;
345
346 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
347 handle_hotplug_event))
348 return -1;
349
350 /* Receive network link events form kernel */
351 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
352
353 return 0;
354 }
355
356 static void write_file(const char *path, const char *val)
357 {
358 int fd;
359
360 fd = open(path, O_WRONLY);
361 if (fd < 0)
362 return;
363
364 if (write(fd, val, strlen(val))) {}
365 close(fd);
366 }
367
368 static int read_file(const char *path, char *buf, const size_t buf_sz)
369 {
370 int fd = -1, ret = -1;
371
372 fd = open(path, O_RDONLY);
373 if (fd < 0)
374 goto out;
375
376 ssize_t len = read(fd, buf, buf_sz - 1);
377 if (len < 0)
378 goto out;
379
380 ret = buf[len] = 0;
381
382 out:
383 if (fd >= 0)
384 close(fd);
385
386 return ret;
387 }
388
389
390 static const char *
391 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
392 {
393 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
394
395 return dev_buf;
396 }
397
398 static const char *
399 dev_sysfs_path(const char *ifname, const char *file)
400 {
401 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
402
403 return dev_buf;
404 }
405
406 static void
407 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
408 const char *val)
409 {
410 write_file(dev_sysctl_path(prefix, ifname, file), val);
411 }
412
413 static int
414 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
415 char *buf, size_t buf_sz)
416 {
417 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
418 }
419
420 static void
421 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
422 {
423 if (!val)
424 return;
425
426 write_file(dev_sysfs_path(ifname, file), val);
427 }
428
429 static void
430 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
431 {
432 char buf[16];
433
434 snprintf(buf, sizeof(buf), "%d", val);
435 system_set_dev_sysfs(file, ifname, buf);
436 }
437
438 static int
439 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
440 {
441 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
442 }
443
444 static void system_set_disable_ipv6(struct device *dev, const char *val)
445 {
446 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
447 }
448
449 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
450 {
451 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
452 }
453
454 static void system_set_rpfilter(struct device *dev, const char *val)
455 {
456 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
457 }
458
459 static void system_set_acceptlocal(struct device *dev, const char *val)
460 {
461 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
462 }
463
464 static void system_set_igmpversion(struct device *dev, const char *val)
465 {
466 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
467 }
468
469 static void system_set_mldversion(struct device *dev, const char *val)
470 {
471 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
472 }
473
474 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
475 {
476 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
477 }
478
479 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
480 {
481 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
482 }
483
484 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
485 {
486 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
487 }
488
489 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
490 {
491 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
492 }
493
494 static void system_set_neigh4locktime(struct device *dev, const char *val)
495 {
496 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
497 }
498
499 static void system_set_dadtransmits(struct device *dev, const char *val)
500 {
501 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
502 }
503
504 static void system_set_sendredirects(struct device *dev, const char *val)
505 {
506 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
507 }
508
509 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
510 {
511 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
512 }
513
514 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
515 {
516 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
517 }
518
519 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
520 {
521 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
522 }
523
524 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
525 {
526 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
527 }
528
529 static void system_set_arp_accept(struct device *dev, const char *val)
530 {
531 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
532 }
533
534 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
535 {
536 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
537 }
538
539 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
540 {
541 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
542 }
543
544 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
545 {
546 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
547 }
548
549 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
550 {
551 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
552 }
553
554 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
555 {
556 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
557 }
558
559 static void system_bridge_set_isolated(struct device *dev, const char *val)
560 {
561 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
562 }
563
564 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
565 {
566 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
567 }
568
569 void system_bridge_set_stp_state(struct device *dev, bool val)
570 {
571 const char *valstr = val ? "1" : "0";
572
573 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
574 }
575
576 static void system_bridge_set_learning(struct device *dev, const char *val)
577 {
578 system_set_dev_sysfs("brport/learning", dev->ifname, val);
579 }
580
581 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
582 {
583 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
584 }
585
586 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
587 {
588 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
589 dev->ifname, buf, buf_sz);
590 }
591
592 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
593 {
594 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
595 dev->ifname, buf, buf_sz);
596 }
597
598 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
599 {
600 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
601 dev->ifname, buf, buf_sz);
602 }
603
604 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
605 {
606 return system_get_dev_sysctl("ipv4/conf", "accept_local",
607 dev->ifname, buf, buf_sz);
608 }
609
610 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
611 {
612 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
613 dev->ifname, buf, buf_sz);
614 }
615
616 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
617 {
618 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
619 dev->ifname, buf, buf_sz);
620 }
621
622 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
623 {
624 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
625 dev->ifname, buf, buf_sz);
626 }
627
628 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
629 {
630 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
631 dev->ifname, buf, buf_sz);
632 }
633
634 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
635 {
636 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
637 dev->ifname, buf, buf_sz);
638 }
639
640 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
641 {
642 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
643 dev->ifname, buf, buf_sz);
644 }
645
646 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
647 {
648 return system_get_dev_sysctl("ipv4/neigh", "locktime",
649 dev->ifname, buf, buf_sz);
650 }
651
652 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
653 {
654 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
655 dev->ifname, buf, buf_sz);
656 }
657
658 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
659 {
660 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
661 dev->ifname, buf, buf_sz);
662 }
663
664
665 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
666 {
667 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
668 dev->ifname, buf, buf_sz);
669 }
670
671 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
672 {
673 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
674 dev->ifname, buf, buf_sz);
675 }
676
677 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
678 {
679 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
680 dev->ifname, buf, buf_sz);
681 }
682
683 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
684 {
685 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
686 dev->ifname, buf, buf_sz);
687 }
688
689 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
690 {
691 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
692 dev->ifname, buf, buf_sz);
693 }
694
695 #ifndef IFF_LOWER_UP
696 #define IFF_LOWER_UP 0x10000
697 #endif
698
699 static void
700 system_device_update_state(struct device *dev, unsigned int flags, unsigned int ifindex)
701 {
702 if (dev->type == &simple_device_type) {
703 bool present = ifindex > 0;
704
705 if (dev->external)
706 present = present && (flags & IFF_UP);
707
708 device_set_present(dev, present);
709 }
710 device_set_link(dev, flags & IFF_LOWER_UP ? true : false);
711 }
712
713 /* Evaluate netlink messages */
714 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
715 {
716 struct nlmsghdr *nh = nlmsg_hdr(msg);
717 struct ifinfomsg *ifi = NLMSG_DATA(nh);
718 struct nlattr *nla[__IFLA_MAX];
719 struct device *dev;
720
721 if (nh->nlmsg_type != RTM_NEWLINK)
722 return 0;
723
724 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
725 if (!nla[IFLA_IFNAME])
726 return 0;
727
728 dev = device_find(nla_data(nla[IFLA_IFNAME]));
729 if (!dev)
730 return 0;
731
732 system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index);
733 return 0;
734 }
735
736 static void
737 handle_hotplug_msg(char *data, int size)
738 {
739 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
740 char *cur, *end, *sep;
741 int skip;
742 bool add;
743
744 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
745 add = true;
746 else if (!strncmp(data, "remove@", 7))
747 add = false;
748 else
749 return;
750
751 skip = strlen(data) + 1;
752 end = data + size;
753
754 for (cur = data + skip; cur < end; cur += skip) {
755 skip = strlen(cur) + 1;
756
757 sep = strchr(cur, '=');
758 if (!sep)
759 continue;
760
761 *sep = 0;
762 if (!strcmp(cur, "INTERFACE"))
763 interface = sep + 1;
764 else if (!strcmp(cur, "SUBSYSTEM")) {
765 subsystem = sep + 1;
766 if (strcmp(subsystem, "net") != 0)
767 return;
768 } else if (!strcmp(cur, "DEVPATH_OLD")) {
769 interface_old = strrchr(sep + 1, '/');
770 if (interface_old)
771 interface_old++;
772 }
773 }
774
775 if (!subsystem || !interface)
776 return;
777
778 if (interface_old)
779 device_hotplug_event(interface_old, false);
780
781 device_hotplug_event(interface, add);
782 }
783
784 static void
785 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
786 {
787 struct event_socket *ev = container_of(u, struct event_socket, uloop);
788 struct sockaddr_nl nla;
789 unsigned char *buf = NULL;
790 int size;
791 int err;
792 socklen_t errlen = sizeof(err);
793
794 if (!u->error) {
795 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
796 if (nla.nl_pid == 0)
797 handle_hotplug_msg((char *) buf, size);
798
799 free(buf);
800 }
801 return;
802 }
803
804 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
805 goto abort;
806
807 switch(err) {
808 case ENOBUFS:
809 /* Increase rx buffer size on netlink socket */
810 ev->bufsize *= 2;
811 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
812 goto abort;
813 break;
814
815 default:
816 goto abort;
817 }
818 u->error = false;
819 return;
820
821 abort:
822 uloop_fd_delete(&ev->uloop);
823 return;
824 }
825
826 static int system_rtnl_call(struct nl_msg *msg)
827 {
828 int ret;
829
830 ret = nl_send_auto_complete(sock_rtnl, msg);
831 nlmsg_free(msg);
832
833 if (ret < 0)
834 return ret;
835
836 return nl_wait_for_ack(sock_rtnl);
837 }
838
839 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
840 {
841 struct nl_msg *msg;
842 struct ifinfomsg iim = {
843 .ifi_family = af,
844 .ifi_index = index,
845 };
846
847 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
848 if (!msg)
849 return NULL;
850
851 nlmsg_append(msg, &iim, sizeof(iim), 0);
852 if (ifname)
853 nla_put_string(msg, IFLA_IFNAME, ifname);
854
855 return msg;
856 }
857
858 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
859 {
860 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
861 }
862
863 static int system_link_del(const char *ifname)
864 {
865 struct nl_msg *msg;
866
867 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
868 if (!msg)
869 return -1;
870
871 return system_rtnl_call(msg);
872 }
873
874 int system_bridge_delbr(struct device *bridge)
875 {
876 return system_link_del(bridge->ifname);
877 }
878
879 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
880 {
881 struct ifreq ifr;
882
883 memset(&ifr, 0, sizeof(ifr));
884 if (dev)
885 ifr.ifr_ifindex = dev->ifindex;
886 else
887 ifr.ifr_data = data;
888 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
889 return ioctl(sock_ioctl, cmd, &ifr);
890 }
891
892 static bool system_is_bridge(const char *name)
893 {
894 struct stat st;
895
896 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
897 }
898
899 static char *system_get_bridge(const char *name, char *buf, int buflen)
900 {
901 char *path;
902 ssize_t len = -1;
903 glob_t gl;
904
905 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
906 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
907 return NULL;
908
909 if (gl.gl_pathc > 0)
910 len = readlink(gl.gl_pathv[0], buf, buflen);
911
912 globfree(&gl);
913
914 if (len < 0)
915 return NULL;
916
917 buf[len] = 0;
918 path = strrchr(buf, '/');
919 if (!path)
920 return NULL;
921
922 return path + 1;
923 }
924
925 static void
926 system_bridge_set_wireless(struct device *bridge, struct device *dev)
927 {
928 bool mcast_to_ucast = dev->wireless_ap;
929 bool hairpin;
930
931 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
932 mcast_to_ucast = dev->settings.multicast_to_unicast;
933 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
934 !bridge->settings.multicast_to_unicast)
935 mcast_to_ucast = false;
936
937 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
938 if (dev->wireless_isolate)
939 hairpin = false;
940
941 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
942 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
943 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
944 }
945
946 int system_bridge_addif(struct device *bridge, struct device *dev)
947 {
948 char buf[64];
949 char *oldbr;
950 int tries = 0;
951 int ret;
952
953 retry:
954 ret = 0;
955 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
956 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
957 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
958 tries++;
959 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
960 dev->ifname, bridge->ifname, tries, strerror(errno));
961 if (tries <= 3)
962 goto retry;
963 }
964
965 if (dev->wireless)
966 system_bridge_set_wireless(bridge, dev);
967
968 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
969 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
970 system_bridge_set_multicast_router(dev, buf);
971 }
972
973 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
974 dev->settings.multicast_fast_leave)
975 system_bridge_set_multicast_fast_leave(dev, "1");
976
977 if (dev->settings.flags & DEV_OPT_LEARNING &&
978 !dev->settings.learning)
979 system_bridge_set_learning(dev, "0");
980
981 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
982 !dev->settings.unicast_flood)
983 system_bridge_set_unicast_flood(dev, "0");
984
985 if (dev->settings.flags & DEV_OPT_ISOLATE &&
986 dev->settings.isolate)
987 system_bridge_set_isolated(dev, "1");
988
989 if (dev->bpdu_filter)
990 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
991
992 return ret;
993 }
994
995 int system_bridge_delif(struct device *bridge, struct device *dev)
996 {
997 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
998 }
999
1000 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
1001 {
1002 struct bridge_vlan_info vinfo = { .vid = vid, };
1003 unsigned short flags = 0;
1004 struct nlattr *afspec;
1005 struct nl_msg *nlm;
1006 int index;
1007 int ret = 0;
1008
1009 index = if_nametoindex(iface);
1010 if (!index)
1011 return -1;
1012
1013 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1014 if (!nlm)
1015 return -1;
1016
1017 if (vflags & BRVLAN_F_SELF)
1018 flags |= BRIDGE_FLAGS_SELF;
1019
1020 if (vflags & BRVLAN_F_PVID)
1021 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1022
1023 if (vflags & BRVLAN_F_UNTAGGED)
1024 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1025
1026 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1027 if (!afspec) {
1028 ret = -ENOMEM;
1029 goto failure;
1030 }
1031
1032 if (flags)
1033 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1034
1035 if (vid_end > vid)
1036 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1037
1038 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1039
1040 if (vid_end > vid) {
1041 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1042 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1043 vinfo.vid = vid_end;
1044 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1045 }
1046
1047 nla_nest_end(nlm, afspec);
1048
1049 return system_rtnl_call(nlm);
1050
1051 failure:
1052 nlmsg_free(nlm);
1053 return ret;
1054 }
1055
1056 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1057 {
1058 const char *ifname = dev->ifname;
1059 struct blob_attr *cur;
1060 char op = cfg ? '+' : '-';
1061 char buf[64];
1062 size_t rem;
1063
1064 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1065 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1066 write_file(dev_buf, buf);
1067
1068 if (!cfg)
1069 return 0;
1070
1071 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1072
1073 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1074
1075 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1076 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1077 cfg->policy == BONDING_MODE_8023AD)
1078 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1079
1080 if (cfg->policy == BONDING_MODE_8023AD) {
1081 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1082 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1083 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1084 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1085 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1086 }
1087
1088 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1089 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1090
1091 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1092 cfg->policy == BONDING_MODE_BALANCE_ALB)
1093 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1094
1095 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1096 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1097 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1098 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1099 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1100 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1101
1102 system_set_dev_sysfs_int((cfg->monitor_arp ?
1103 "bonding/arp_interval" :
1104 "bonding/miimon"), ifname, cfg->monitor_interval);
1105
1106 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1107 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1108 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1109 }
1110
1111 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1112 if (cfg->policy < BONDING_MODE_8023AD)
1113 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1114 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1115 if (!cfg->monitor_arp && cfg->monitor_interval) {
1116 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1117 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1118 }
1119
1120 return 0;
1121 }
1122
1123 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1124 {
1125 const char *port_name = port->ifname;
1126 const char op_ch = add ? '+' : '-';
1127 char buf[IFNAMSIZ + 1];
1128
1129 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1130 system_if_down(port);
1131 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1132 system_if_up(port);
1133
1134 if (primary)
1135 system_set_dev_sysfs("bonding/primary", dev->ifname,
1136 add ? port_name : "");
1137
1138 return 0;
1139 }
1140
1141 int system_if_resolve(struct device *dev)
1142 {
1143 struct ifreq ifr;
1144
1145 memset(&ifr, 0, sizeof(ifr));
1146 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1147 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1148 return ifr.ifr_ifindex;
1149 else
1150 return 0;
1151 }
1152
1153 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1154 {
1155 struct ifreq ifr;
1156
1157 memset(&ifr, 0, sizeof(ifr));
1158 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1159 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1160 return -1;
1161
1162 ifr.ifr_flags |= add;
1163 ifr.ifr_flags &= ~rem;
1164 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1165 }
1166
1167 struct clear_data {
1168 struct nl_msg *msg;
1169 struct device *dev;
1170 int type;
1171 int size;
1172 int af;
1173 };
1174
1175
1176 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1177 {
1178 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1179
1180 return (long)ifa->ifa_index == ifindex;
1181 }
1182
1183 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1184 {
1185 struct rtmsg *r = NLMSG_DATA(hdr);
1186 struct nlattr *tb[__RTA_MAX];
1187
1188 if (r->rtm_protocol == RTPROT_KERNEL &&
1189 r->rtm_family == AF_INET6)
1190 return false;
1191
1192 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1193 if (!tb[RTA_OIF])
1194 return false;
1195
1196 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1197 }
1198
1199 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1200 {
1201 return true;
1202 }
1203
1204 static int cb_clear_event(struct nl_msg *msg, void *arg)
1205 {
1206 struct clear_data *clr = arg;
1207 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1208 bool (*cb)(struct nlmsghdr *, int ifindex);
1209 int type, ret;
1210
1211 switch(clr->type) {
1212 case RTM_GETADDR:
1213 type = RTM_DELADDR;
1214 if (hdr->nlmsg_type != RTM_NEWADDR)
1215 return NL_SKIP;
1216
1217 cb = check_ifaddr;
1218 break;
1219 case RTM_GETROUTE:
1220 type = RTM_DELROUTE;
1221 if (hdr->nlmsg_type != RTM_NEWROUTE)
1222 return NL_SKIP;
1223
1224 cb = check_route;
1225 break;
1226 case RTM_GETRULE:
1227 type = RTM_DELRULE;
1228 if (hdr->nlmsg_type != RTM_NEWRULE)
1229 return NL_SKIP;
1230
1231 cb = check_rule;
1232 break;
1233 default:
1234 return NL_SKIP;
1235 }
1236
1237 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1238 return NL_SKIP;
1239
1240 if (type == RTM_DELRULE)
1241 D(SYSTEM, "Remove a rule\n");
1242 else
1243 D(SYSTEM, "Remove %s from device %s\n",
1244 type == RTM_DELADDR ? "an address" : "a route",
1245 clr->dev->ifname);
1246
1247 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1248 hdr = nlmsg_hdr(clr->msg);
1249 hdr->nlmsg_type = type;
1250 hdr->nlmsg_flags = NLM_F_REQUEST;
1251
1252 nl_socket_disable_auto_ack(sock_rtnl);
1253 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1254 if (ret < 0) {
1255 if (type == RTM_DELRULE)
1256 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1257 else
1258 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1259 type == RTM_DELADDR ? "an address" : "a route",
1260 clr->dev->ifname, ret);
1261 }
1262
1263 nl_socket_enable_auto_ack(sock_rtnl);
1264
1265 return NL_SKIP;
1266 }
1267
1268 static int
1269 cb_finish_event(struct nl_msg *msg, void *arg)
1270 {
1271 int *pending = arg;
1272 *pending = 0;
1273 return NL_STOP;
1274 }
1275
1276 static int
1277 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1278 {
1279 int *pending = arg;
1280 *pending = err->error;
1281 return NL_STOP;
1282 }
1283
1284 static void
1285 system_if_clear_entries(struct device *dev, int type, int af)
1286 {
1287 struct clear_data clr;
1288 struct nl_cb *cb;
1289 struct rtmsg rtm = {
1290 .rtm_family = af,
1291 .rtm_flags = RTM_F_CLONED,
1292 };
1293 int flags = NLM_F_DUMP;
1294 int pending = 1;
1295
1296 clr.af = af;
1297 clr.dev = dev;
1298 clr.type = type;
1299 switch (type) {
1300 case RTM_GETADDR:
1301 case RTM_GETRULE:
1302 clr.size = sizeof(struct rtgenmsg);
1303 break;
1304 case RTM_GETROUTE:
1305 clr.size = sizeof(struct rtmsg);
1306 break;
1307 default:
1308 return;
1309 }
1310
1311 cb = nl_cb_alloc(NL_CB_DEFAULT);
1312 if (!cb)
1313 return;
1314
1315 clr.msg = nlmsg_alloc_simple(type, flags);
1316 if (!clr.msg)
1317 goto out;
1318
1319 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1320 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1321 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1322 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1323
1324 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1325 goto free;
1326
1327 while (pending > 0)
1328 nl_recvmsgs(sock_rtnl, cb);
1329
1330 free:
1331 nlmsg_free(clr.msg);
1332 out:
1333 nl_cb_put(cb);
1334 }
1335
1336 /*
1337 * Clear bridge (membership) state and bring down device
1338 */
1339 void system_if_clear_state(struct device *dev)
1340 {
1341 static char buf[256];
1342 char *bridge;
1343 device_set_ifindex(dev, system_if_resolve(dev));
1344
1345 if (dev->external || !dev->ifindex)
1346 return;
1347
1348 system_if_flags(dev->ifname, 0, IFF_UP);
1349
1350 if (system_is_bridge(dev->ifname)) {
1351 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1352 system_bridge_delbr(dev);
1353 return;
1354 }
1355
1356 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1357 if (bridge) {
1358 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1359 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1360 }
1361
1362 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1363 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1364 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1365 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1366 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1367 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1368 system_set_disable_ipv6(dev, "0");
1369 }
1370
1371 static inline unsigned long
1372 sec_to_jiffies(int val)
1373 {
1374 return (unsigned long) val * 100;
1375 }
1376
1377 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1378 {
1379 struct nlattr *linkinfo, *data;
1380 struct nl_msg *msg;
1381 uint64_t val;
1382 int rv;
1383
1384 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1385 if (!msg)
1386 return -1;
1387
1388 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1389 goto nla_put_failure;
1390
1391 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1392
1393 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1394 goto nla_put_failure;
1395
1396 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1397 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1398 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1399 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1400 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1401
1402 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1403 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1404
1405 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1406 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1407 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1408 }
1409
1410 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1411 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1412
1413 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1414 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1415
1416 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1417 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1418
1419 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1420 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1421 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1422 val = cfg->robustness * cfg->query_interval +
1423 cfg->query_response_interval;
1424
1425 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1426
1427 val -= cfg->query_response_interval / 2;
1428
1429 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1430 }
1431
1432 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1433 val = cfg->query_interval / 4;
1434
1435 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1436 }
1437
1438 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1439 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1440 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1441 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1442
1443 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1444 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1445
1446 nla_nest_end(msg, data);
1447 nla_nest_end(msg, linkinfo);
1448
1449 rv = system_rtnl_call(msg);
1450 if (rv)
1451 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1452
1453 return rv;
1454
1455 nla_put_failure:
1456 nlmsg_free(msg);
1457 return -ENOMEM;
1458 }
1459
1460 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1461 {
1462 struct nl_msg *msg;
1463 struct nlattr *linkinfo, *data;
1464 size_t i;
1465 int rv;
1466 static const struct {
1467 const char *name;
1468 enum macvlan_mode val;
1469 } modes[] = {
1470 { "private", MACVLAN_MODE_PRIVATE },
1471 { "vepa", MACVLAN_MODE_VEPA },
1472 { "bridge", MACVLAN_MODE_BRIDGE },
1473 { "passthru", MACVLAN_MODE_PASSTHRU },
1474 };
1475
1476 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1477 if (!msg)
1478 return -1;
1479
1480 if (cfg->flags & MACVLAN_OPT_MACADDR)
1481 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1482 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1483
1484 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1485 goto nla_put_failure;
1486
1487 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1488
1489 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1490 goto nla_put_failure;
1491
1492 if (cfg->mode) {
1493 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1494 if (strcmp(cfg->mode, modes[i].name) != 0)
1495 continue;
1496
1497 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1498 break;
1499 }
1500 }
1501
1502 nla_nest_end(msg, data);
1503 nla_nest_end(msg, linkinfo);
1504
1505 rv = system_rtnl_call(msg);
1506 if (rv)
1507 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1508
1509 return rv;
1510
1511 nla_put_failure:
1512 nlmsg_free(msg);
1513 return -ENOMEM;
1514 }
1515
1516 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1517 {
1518 struct nl_msg *msg;
1519 int index;
1520
1521 if (!dev)
1522 return -1;
1523
1524 index = system_if_resolve(dev);
1525 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1526 if (!msg)
1527 return -1;
1528
1529 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1530 return system_rtnl_call(msg);
1531 }
1532
1533 int system_macvlan_del(struct device *macvlan)
1534 {
1535 return system_link_del(macvlan->ifname);
1536 }
1537
1538 int system_netns_open(const pid_t target_ns)
1539 {
1540 char pid_net_path[PATH_MAX];
1541
1542 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1543
1544 return open(pid_net_path, O_RDONLY);
1545 }
1546
1547 int system_netns_set(int netns_fd)
1548 {
1549 return setns(netns_fd, CLONE_NEWNET);
1550 }
1551
1552 int system_veth_add(struct device *veth, struct veth_config *cfg)
1553 {
1554 struct nl_msg *msg;
1555 struct ifinfomsg empty_iim = {0,};
1556 struct nlattr *linkinfo, *data, *veth_info;
1557 int rv;
1558
1559 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1560
1561 if (!msg)
1562 return -1;
1563
1564 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1565
1566 if (cfg->flags & VETH_OPT_MACADDR)
1567 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1568 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1569
1570 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1571 goto nla_put_failure;
1572
1573 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1574
1575 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1576 goto nla_put_failure;
1577
1578 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1579 goto nla_put_failure;
1580
1581 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1582
1583 if (cfg->flags & VETH_OPT_PEER_NAME)
1584 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1585 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1586 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1587
1588 nla_nest_end(msg, veth_info);
1589 nla_nest_end(msg, data);
1590 nla_nest_end(msg, linkinfo);
1591
1592 rv = system_rtnl_call(msg);
1593 if (rv) {
1594 if (cfg->flags & VETH_OPT_PEER_NAME)
1595 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1596 else
1597 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1598 }
1599
1600 return rv;
1601
1602 nla_put_failure:
1603 nlmsg_free(msg);
1604 return -ENOMEM;
1605 }
1606
1607 int system_veth_del(struct device *veth)
1608 {
1609 return system_link_del(veth->ifname);
1610 }
1611
1612 static int system_vlan(struct device *dev, int id)
1613 {
1614 struct vlan_ioctl_args ifr = {
1615 .cmd = SET_VLAN_NAME_TYPE_CMD,
1616 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1617 };
1618
1619 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1620 return -1;
1621
1622 if (id < 0) {
1623 ifr.cmd = DEL_VLAN_CMD;
1624 ifr.u.VID = 0;
1625 } else {
1626 ifr.cmd = ADD_VLAN_CMD;
1627 ifr.u.VID = id;
1628 }
1629 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1630 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1631 }
1632
1633 int system_vlan_add(struct device *dev, int id)
1634 {
1635 return system_vlan(dev, id);
1636 }
1637
1638 int system_vlan_del(struct device *dev)
1639 {
1640 return system_vlan(dev, -1);
1641 }
1642
1643 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1644 {
1645 struct nl_msg *msg;
1646 struct nlattr *linkinfo, *data, *qos;
1647 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1648 struct vlan_qos_mapping *elem;
1649 struct ifla_vlan_qos_mapping nl_qos_map;
1650 int rv;
1651
1652 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1653
1654 if (!msg)
1655 return -1;
1656
1657 nlmsg_append(msg, &iim, sizeof(iim), 0);
1658 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1659 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1660
1661 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1662 goto nla_put_failure;
1663
1664 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1665
1666 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1667 goto nla_put_failure;
1668
1669 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1670
1671 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1672 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1673 #else
1674 if(cfg->proto == VLAN_PROTO_8021AD)
1675 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1676 #endif
1677
1678 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1679 goto nla_put_failure;
1680
1681 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1682 nl_qos_map.from = elem->from;
1683 nl_qos_map.to = elem->to;
1684 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1685 }
1686 nla_nest_end(msg, qos);
1687
1688 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1689 goto nla_put_failure;
1690
1691 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1692 nl_qos_map.from = elem->from;
1693 nl_qos_map.to = elem->to;
1694 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1695 }
1696 nla_nest_end(msg, qos);
1697
1698 nla_nest_end(msg, data);
1699 nla_nest_end(msg, linkinfo);
1700
1701 rv = system_rtnl_call(msg);
1702 if (rv)
1703 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1704
1705 return rv;
1706
1707 nla_put_failure:
1708 nlmsg_free(msg);
1709 return -ENOMEM;
1710 }
1711
1712 int system_vlandev_del(struct device *vlandev)
1713 {
1714 return system_link_del(vlandev->ifname);
1715 }
1716
1717 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
1718 struct if_get_master_data {
1719 int ifindex;
1720 int master_ifindex;
1721 int pending;
1722 };
1723
1724 static void if_get_master_dsa_linkinfo_attr(struct if_get_master_data *data,
1725 struct rtattr *attr)
1726 {
1727 struct rtattr *cur;
1728 int rem = RTA_PAYLOAD(attr);
1729
1730 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1731 if (cur->rta_type != IFLA_DSA_MASTER)
1732 continue;
1733
1734 data->master_ifindex = *(__u32 *)RTA_DATA(cur);
1735 }
1736 }
1737
1738 static void if_get_master_linkinfo_attr(struct if_get_master_data *data,
1739 struct rtattr *attr)
1740 {
1741 struct rtattr *cur;
1742 int rem = RTA_PAYLOAD(attr);
1743
1744 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1745 if (cur->rta_type != IFLA_INFO_KIND && cur->rta_type != IFLA_INFO_DATA)
1746 continue;
1747
1748 if (cur->rta_type == IFLA_INFO_KIND && strcmp("dsa", (char *)RTA_DATA(cur)))
1749 break;
1750
1751 if (cur->rta_type == IFLA_INFO_DATA)
1752 if_get_master_dsa_linkinfo_attr(data, cur);
1753 }
1754 }
1755
1756 static int cb_if_get_master_valid(struct nl_msg *msg, void *arg)
1757 {
1758 struct nlmsghdr *nh = nlmsg_hdr(msg);
1759 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1760 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1761 struct rtattr *attr;
1762 int rem;
1763
1764 if (nh->nlmsg_type != RTM_NEWLINK)
1765 return NL_SKIP;
1766
1767 if (ifi->ifi_family != AF_UNSPEC)
1768 return NL_SKIP;
1769
1770 if (ifi->ifi_index != data->ifindex)
1771 return NL_SKIP;
1772
1773 attr = IFLA_RTA(ifi);
1774 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1775
1776 while (RTA_OK(attr, rem)) {
1777 if (attr->rta_type == IFLA_LINKINFO)
1778 if_get_master_linkinfo_attr(data, attr);
1779
1780 attr = RTA_NEXT(attr, rem);
1781 }
1782
1783 return NL_OK;
1784 }
1785
1786 static int cb_if_get_master_ack(struct nl_msg *msg, void *arg)
1787 {
1788 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1789 data->pending = 0;
1790 return NL_STOP;
1791 }
1792
1793 static int cb_if_get_master_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1794 {
1795 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1796 data->pending = 0;
1797 return NL_STOP;
1798 }
1799
1800 static int system_if_get_master_ifindex(struct device *dev)
1801 {
1802 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1803 struct nl_msg *msg;
1804 struct ifinfomsg ifi = {
1805 .ifi_family = AF_UNSPEC,
1806 .ifi_index = 0,
1807 };
1808 struct if_get_master_data data = {
1809 .ifindex = if_nametoindex(dev->ifname),
1810 .master_ifindex = -1,
1811 .pending = 1,
1812 };
1813 int ret = -1;
1814
1815 if (!cb)
1816 return ret;
1817
1818 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
1819 if (!msg)
1820 goto out;
1821
1822 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1823 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1824 goto free;
1825
1826 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_get_master_valid, &data);
1827 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_get_master_ack, &data);
1828 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_get_master_error, &data);
1829
1830 ret = nl_send_auto_complete(sock_rtnl, msg);
1831 if (ret < 0)
1832 goto free;
1833
1834 while (data.pending > 0)
1835 nl_recvmsgs(sock_rtnl, cb);
1836
1837 if (data.master_ifindex >= 0)
1838 ret = data.master_ifindex;
1839
1840 free:
1841 nlmsg_free(msg);
1842 out:
1843 nl_cb_put(cb);
1844 return ret;
1845 }
1846
1847 static void system_set_master(struct device *dev, int master_ifindex)
1848 {
1849 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
1850 struct nl_msg *nlm;
1851
1852 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1853 if (!nlm)
1854 return;
1855
1856 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
1857 nla_put_string(nlm, IFLA_IFNAME, dev->ifname);
1858
1859 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
1860 if (!linkinfo)
1861 goto failure;
1862
1863 nla_put_string(nlm, IFLA_INFO_KIND, "dsa");
1864 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
1865 if (!infodata)
1866 goto failure;
1867
1868 nla_put_u32(nlm, IFLA_DSA_MASTER, master_ifindex);
1869
1870 nla_nest_end(nlm, infodata);
1871 nla_nest_end(nlm, linkinfo);
1872
1873 system_rtnl_call(nlm);
1874
1875 return;
1876
1877 failure:
1878 nlmsg_free(nlm);
1879 }
1880 #endif
1881
1882 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1883 {
1884 if (nr < 0)
1885 return;
1886
1887 if (nr >= (nwords * 32))
1888 return;
1889
1890 mask[nr / 32] &= ~(1U << (nr % 32));
1891 }
1892
1893 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1894 {
1895 if (nr < 0)
1896 return false;
1897
1898 if (nr >= (nwords * 32))
1899 return false;
1900
1901 return !!(mask[nr / 32] & (1U << (nr % 32)));
1902 }
1903
1904 static int
1905 system_get_ethtool_gro(struct device *dev)
1906 {
1907 struct ethtool_value ecmd;
1908 struct ifreq ifr = {
1909 .ifr_data = (caddr_t)&ecmd,
1910 };
1911
1912 memset(&ecmd, 0, sizeof(ecmd));
1913 ecmd.cmd = ETHTOOL_GGRO;
1914 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1915
1916 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1917 return -1;
1918
1919 return ecmd.data;
1920 }
1921
1922 static void
1923 system_set_ethtool_gro(struct device *dev, struct device_settings *s)
1924 {
1925 struct ethtool_value ecmd;
1926 struct ifreq ifr = {
1927 .ifr_data = (caddr_t)&ecmd,
1928 };
1929
1930 memset(&ecmd, 0, sizeof(ecmd));
1931 ecmd.cmd = ETHTOOL_SGRO;
1932 ecmd.data = s->gro;
1933 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1934
1935 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1936 }
1937
1938 static void
1939 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1940 {
1941 struct ethtool_pauseparam pp;
1942 struct ifreq ifr = {
1943 .ifr_data = (caddr_t)&pp,
1944 };
1945
1946 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1947 memset(&pp, 0, sizeof(pp));
1948 pp.cmd = ETHTOOL_GPAUSEPARAM;
1949 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1950 return;
1951
1952 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1953 pp.autoneg = AUTONEG_DISABLE;
1954
1955 if (s->flags & DEV_OPT_PAUSE) {
1956 if (s->flags & DEV_OPT_RXPAUSE)
1957 pp.rx_pause = s->rxpause && s->pause;
1958 else
1959 pp.rx_pause = s->pause;
1960
1961 if (s->flags & DEV_OPT_TXPAUSE)
1962 pp.tx_pause = s->txpause && s->pause;
1963 else
1964 pp.tx_pause = s->pause;
1965 } else {
1966 if (s->flags & DEV_OPT_RXPAUSE)
1967 pp.rx_pause = s->rxpause;
1968
1969 if (s->flags & DEV_OPT_TXPAUSE)
1970 pp.tx_pause = s->txpause;
1971 }
1972
1973 if (s->flags & DEV_OPT_ASYM_PAUSE &&
1974 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
1975 pp.rx_pause = pp.tx_pause = false;
1976 } else {
1977 pp.autoneg = AUTONEG_ENABLE;
1978 /* Pause and Asym_Pause advertising bits will be set via
1979 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
1980 */
1981 }
1982
1983 pp.cmd = ETHTOOL_SPAUSEPARAM;
1984 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1985 }
1986
1987 static void
1988 system_set_ethtool_eee_settings(struct device *dev, struct device_settings *s)
1989 {
1990 struct ethtool_eee eeecmd;
1991 struct ifreq ifr = {
1992 .ifr_data = (caddr_t)&eeecmd,
1993 };
1994
1995 memset(&eeecmd, 0, sizeof(eeecmd));
1996 eeecmd.cmd = ETHTOOL_SEEE;
1997 eeecmd.eee_enabled = s->eee;
1998 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1999
2000 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2001 netifd_log_message(L_WARNING, "cannot set eee %d for device %s", s->eee, dev->ifname);
2002 }
2003
2004 static void
2005 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
2006 {
2007 struct {
2008 struct ethtool_link_settings req;
2009 __u32 link_mode_data[3 * 127];
2010 } ecmd;
2011 struct ifreq ifr = {
2012 .ifr_data = (caddr_t)&ecmd,
2013 };
2014 size_t i;
2015 __s8 nwords;
2016 __u32 *supported, *advertising;
2017
2018 system_set_ethtool_pause(dev, s);
2019
2020 if (s->flags & DEV_OPT_EEE)
2021 system_set_ethtool_eee_settings(dev, s);
2022
2023 memset(&ecmd, 0, sizeof(ecmd));
2024 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2025 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2026
2027 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2028 ecmd.req.link_mode_masks_nwords >= 0 ||
2029 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2030 return;
2031
2032 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2033
2034 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2035 ecmd.req.link_mode_masks_nwords <= 0 ||
2036 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2037 return;
2038
2039 nwords = ecmd.req.link_mode_masks_nwords;
2040 supported = &ecmd.link_mode_data[0];
2041 advertising = &ecmd.link_mode_data[nwords];
2042 memcpy(advertising, supported, sizeof(__u32) * nwords);
2043
2044 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2045 if (s->flags & DEV_OPT_DUPLEX) {
2046 if (s->duplex)
2047 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2048 else
2049 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2050 }
2051 if (!(s->flags & DEV_OPT_SPEED) ||
2052 s->speed == ethtool_modes[i].speed)
2053 continue;
2054
2055 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2056 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2057 }
2058
2059 if (s->flags & DEV_OPT_PAUSE)
2060 if (!s->pause)
2061 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
2062
2063 if (s->flags & DEV_OPT_ASYM_PAUSE)
2064 if (!s->asym_pause)
2065 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
2066
2067 if (s->flags & DEV_OPT_AUTONEG) {
2068 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
2069 if (!s->autoneg) {
2070 if (s->flags & DEV_OPT_SPEED)
2071 ecmd.req.speed = s->speed;
2072
2073 if (s->flags & DEV_OPT_DUPLEX)
2074 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
2075 }
2076 }
2077
2078 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
2079 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2080 }
2081
2082 static void
2083 system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s)
2084 {
2085 if (s->flags & DEV_OPT_GRO)
2086 system_set_ethtool_gro(dev, s);
2087 }
2088
2089 void
2090 system_if_get_settings(struct device *dev, struct device_settings *s)
2091 {
2092 struct ifreq ifr;
2093 char buf[10];
2094 int ret;
2095
2096 memset(&ifr, 0, sizeof(ifr));
2097 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2098
2099 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
2100 s->mtu = ifr.ifr_mtu;
2101 s->flags |= DEV_OPT_MTU;
2102 }
2103
2104 s->mtu6 = system_update_ipv6_mtu(dev, 0);
2105 if (s->mtu6 > 0)
2106 s->flags |= DEV_OPT_MTU6;
2107
2108 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
2109 s->txqueuelen = ifr.ifr_qlen;
2110 s->flags |= DEV_OPT_TXQUEUELEN;
2111 }
2112
2113 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
2114 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
2115 s->flags |= DEV_OPT_MACADDR;
2116 }
2117
2118 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
2119 s->ipv6 = !strtoul(buf, NULL, 0);
2120 s->flags |= DEV_OPT_IPV6;
2121 }
2122
2123 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
2124 s->ip6segmentrouting = strtoul(buf, NULL, 0);
2125 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
2126 }
2127
2128 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
2129 s->promisc = ifr.ifr_flags & IFF_PROMISC;
2130 s->flags |= DEV_OPT_PROMISC;
2131
2132 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
2133 s->flags |= DEV_OPT_MULTICAST;
2134 }
2135
2136 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
2137 s->rpfilter = strtoul(buf, NULL, 0);
2138 s->flags |= DEV_OPT_RPFILTER;
2139 }
2140
2141 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
2142 s->acceptlocal = strtoul(buf, NULL, 0);
2143 s->flags |= DEV_OPT_ACCEPTLOCAL;
2144 }
2145
2146 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
2147 s->igmpversion = strtoul(buf, NULL, 0);
2148 s->flags |= DEV_OPT_IGMPVERSION;
2149 }
2150
2151 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
2152 s->mldversion = strtoul(buf, NULL, 0);
2153 s->flags |= DEV_OPT_MLDVERSION;
2154 }
2155
2156 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
2157 s->neigh4reachabletime = strtoul(buf, NULL, 0);
2158 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2159 }
2160
2161 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
2162 s->neigh6reachabletime = strtoul(buf, NULL, 0);
2163 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2164 }
2165
2166 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
2167 s->neigh4locktime = strtol(buf, NULL, 0);
2168 s->flags |= DEV_OPT_NEIGHLOCKTIME;
2169 }
2170
2171 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
2172 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
2173 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2174 }
2175
2176 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
2177 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
2178 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2179 }
2180
2181 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
2182 s->dadtransmits = strtoul(buf, NULL, 0);
2183 s->flags |= DEV_OPT_DADTRANSMITS;
2184 }
2185
2186 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
2187 s->sendredirects = strtoul(buf, NULL, 0);
2188 s->flags |= DEV_OPT_SENDREDIRECTS;
2189 }
2190
2191 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2192 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2193 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
2194 }
2195
2196 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2197 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2198 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
2199 }
2200
2201 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
2202 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
2203 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
2204 }
2205
2206 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
2207 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
2208 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
2209 }
2210
2211 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
2212 s->arp_accept = strtoul(buf, NULL, 0);
2213 s->flags |= DEV_OPT_ARP_ACCEPT;
2214 }
2215
2216 ret = system_get_ethtool_gro(dev);
2217 if (ret >= 0) {
2218 s->gro = ret;
2219 s->flags |= DEV_OPT_GRO;
2220 }
2221
2222 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2223 ret = system_if_get_master_ifindex(dev);
2224 if (ret >= 0) {
2225 s->master_ifindex = ret;
2226 s->flags |= DEV_OPT_MASTER;
2227 }
2228 #endif
2229 }
2230
2231 void
2232 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
2233 {
2234 struct ifreq ifr;
2235 char buf[12];
2236
2237 apply_mask &= s->flags;
2238
2239 memset(&ifr, 0, sizeof(ifr));
2240 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2241 if (apply_mask & DEV_OPT_MTU) {
2242 ifr.ifr_mtu = s->mtu;
2243 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2244 s->flags &= ~DEV_OPT_MTU;
2245 }
2246 if (apply_mask & DEV_OPT_MTU6) {
2247 system_update_ipv6_mtu(dev, s->mtu6);
2248 }
2249 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2250 ifr.ifr_qlen = s->txqueuelen;
2251 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2252 s->flags &= ~DEV_OPT_TXQUEUELEN;
2253 }
2254 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2255 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2256 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2257 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2258 s->flags &= ~DEV_OPT_MACADDR;
2259 }
2260 if (apply_mask & DEV_OPT_IPV6)
2261 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2262 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2263 struct device dummy = {
2264 .ifname = "all",
2265 };
2266 bool ip6segmentrouting = device_check_ip6segmentrouting();
2267
2268 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2269 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2270 }
2271 if (apply_mask & DEV_OPT_PROMISC) {
2272 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2273 !s->promisc ? IFF_PROMISC : 0) < 0)
2274 s->flags &= ~DEV_OPT_PROMISC;
2275 }
2276 if (apply_mask & DEV_OPT_RPFILTER) {
2277 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2278 system_set_rpfilter(dev, buf);
2279 }
2280 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2281 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2282 if (apply_mask & DEV_OPT_IGMPVERSION) {
2283 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2284 system_set_igmpversion(dev, buf);
2285 }
2286 if (apply_mask & DEV_OPT_MLDVERSION) {
2287 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2288 system_set_mldversion(dev, buf);
2289 }
2290 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2291 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2292 system_set_neigh4reachabletime(dev, buf);
2293 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2294 system_set_neigh6reachabletime(dev, buf);
2295 }
2296 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2297 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2298 system_set_neigh4locktime(dev, buf);
2299 }
2300 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2301 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2302 system_set_neigh4gcstaletime(dev, buf);
2303 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2304 system_set_neigh6gcstaletime(dev, buf);
2305 }
2306 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2307 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2308 system_set_dadtransmits(dev, buf);
2309 }
2310 if (apply_mask & DEV_OPT_MULTICAST) {
2311 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2312 !s->multicast ? IFF_MULTICAST : 0) < 0)
2313 s->flags &= ~DEV_OPT_MULTICAST;
2314 }
2315 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2316 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2317 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2318 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2319 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2320 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2321 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2322 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2323 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2324 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2325 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2326 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2327 if (apply_mask & DEV_OPT_MASTER)
2328 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2329 system_set_master(dev, s->master_ifindex);
2330 #else
2331 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 6.1.0, changing DSA port conduit is not supported!", dev->ifname);
2332 #endif
2333 system_set_ethtool_settings(dev, s);
2334 }
2335
2336 void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s)
2337 {
2338 system_set_ethtool_settings_after_up(dev, s);
2339 }
2340
2341 int system_if_up(struct device *dev)
2342 {
2343 return system_if_flags(dev->ifname, IFF_UP, 0);
2344 }
2345
2346 int system_if_down(struct device *dev)
2347 {
2348 return system_if_flags(dev->ifname, 0, IFF_UP);
2349 }
2350
2351 struct if_check_data {
2352 struct device *dev;
2353 int pending;
2354 int ret;
2355 };
2356
2357 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2358 {
2359 struct nlmsghdr *nh = nlmsg_hdr(msg);
2360 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2361 struct if_check_data *chk = (struct if_check_data *)arg;
2362
2363 if (nh->nlmsg_type != RTM_NEWLINK)
2364 return NL_SKIP;
2365
2366 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2367 return NL_OK;
2368 }
2369
2370 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2371 {
2372 struct if_check_data *chk = (struct if_check_data *)arg;
2373 chk->pending = 0;
2374 return NL_STOP;
2375 }
2376
2377 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2378 {
2379 struct if_check_data *chk = (struct if_check_data *)arg;
2380
2381 if (chk->dev->type == &simple_device_type)
2382 device_set_present(chk->dev, false);
2383 device_set_link(chk->dev, false);
2384 chk->pending = err->error;
2385
2386 return NL_STOP;
2387 }
2388
2389 struct bridge_vlan_check_data {
2390 struct device *check_dev;
2391 int ifindex;
2392 int ret;
2393 bool pending;
2394 };
2395
2396 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2397 struct bridge_vlan_port *port,
2398 struct bridge_vlan_info *vinfo)
2399 {
2400 uint16_t flags = 0, diff, mask;
2401
2402 if (port->flags & BRVLAN_F_PVID)
2403 flags |= BRIDGE_VLAN_INFO_PVID;
2404 if (port->flags & BRVLAN_F_UNTAGGED)
2405 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2406
2407 diff = vinfo->flags ^ flags;
2408 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2409 if (diff & mask) {
2410 data->ret = 1;
2411 data->pending = false;
2412 }
2413
2414 port->check = 1;
2415 }
2416
2417 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2418 struct rtattr *attr)
2419 {
2420 struct bridge_vlan_hotplug_port *port;
2421 struct bridge_vlan_info *vinfo;
2422 struct bridge_vlan *vlan;
2423 struct rtattr *cur;
2424 int rem = RTA_PAYLOAD(attr);
2425 int i;
2426
2427 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2428 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2429 continue;
2430
2431 vinfo = RTA_DATA(cur);
2432 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2433 if (!vlan) {
2434 data->ret = 1;
2435 data->pending = false;
2436 return;
2437 }
2438
2439 for (i = 0; i < vlan->n_ports; i++)
2440 if (!vlan->ports[i].check)
2441 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2442
2443 list_for_each_entry(port, &vlan->hotplug_ports, list)
2444 if (!port->port.check)
2445 bridge_vlan_check_port(data, &port->port, vinfo);
2446 }
2447 }
2448
2449 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2450 {
2451 struct bridge_vlan_check_data *data = arg;
2452 struct nlmsghdr *nh = nlmsg_hdr(msg);
2453 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2454 struct rtattr *attr;
2455 int rem;
2456
2457 if (nh->nlmsg_type != RTM_NEWLINK)
2458 return NL_SKIP;
2459
2460 if (ifi->ifi_family != AF_BRIDGE)
2461 return NL_SKIP;
2462
2463 if (ifi->ifi_index != data->ifindex)
2464 return NL_SKIP;
2465
2466 attr = IFLA_RTA(ifi);
2467 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2468 while (RTA_OK(attr, rem)) {
2469 if (attr->rta_type == IFLA_AF_SPEC)
2470 bridge_vlan_check_attr(data, attr);
2471
2472 attr = RTA_NEXT(attr, rem);
2473 }
2474
2475 return NL_SKIP;
2476 }
2477
2478 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2479 {
2480 struct bridge_vlan_check_data *data = arg;
2481 data->pending = false;
2482 return NL_STOP;
2483 }
2484
2485 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2486 {
2487 struct bridge_vlan_check_data *data = arg;
2488 data->pending = false;
2489 return NL_STOP;
2490 }
2491
2492 int system_bridge_vlan_check(struct device *dev, char *ifname)
2493 {
2494 struct bridge_vlan_check_data data = {
2495 .check_dev = dev,
2496 .ifindex = if_nametoindex(ifname),
2497 .ret = -1,
2498 .pending = true,
2499 };
2500 static struct ifinfomsg ifi = {
2501 .ifi_family = AF_BRIDGE
2502 };
2503 static struct rtattr ext_req = {
2504 .rta_type = IFLA_EXT_MASK,
2505 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2506 };
2507 uint32_t filter = RTEXT_FILTER_BRVLAN;
2508 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2509 struct bridge_vlan *vlan;
2510 struct nl_msg *msg;
2511 int i;
2512
2513 if (!data.ifindex)
2514 return 0;
2515
2516 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2517
2518 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2519 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2520 nlmsg_append(msg, &filter, sizeof(filter), 0))
2521 goto free;
2522
2523 vlist_for_each_element(&dev->vlans, vlan, node) {
2524 struct bridge_vlan_hotplug_port *port;
2525
2526 for (i = 0; i < vlan->n_ports; i++) {
2527 if (!strcmp(vlan->ports[i].ifname, ifname))
2528 vlan->ports[i].check = 0;
2529 else
2530 vlan->ports[i].check = -1;
2531 }
2532
2533 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2534 if (!strcmp(port->port.ifname, ifname))
2535 port->port.check = 0;
2536 else
2537 port->port.check = -1;
2538 }
2539 }
2540
2541 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2542 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2543 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2544 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2545
2546 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2547 goto free;
2548
2549 data.ret = 0;
2550 while (data.pending)
2551 nl_recvmsgs(sock_rtnl, cb);
2552
2553 vlist_for_each_element(&dev->vlans, vlan, node) {
2554 struct bridge_vlan_hotplug_port *port;
2555
2556 for (i = 0; i < vlan->n_ports; i++) {
2557 if (!vlan->ports[i].check) {
2558 data.ret = 1;
2559 break;
2560 }
2561 }
2562
2563 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2564 if (!port->port.check) {
2565 data.ret = 1;
2566 break;
2567 }
2568 }
2569 }
2570
2571 free:
2572 nlmsg_free(msg);
2573 nl_cb_put(cb);
2574 return data.ret;
2575 }
2576
2577 int system_if_check(struct device *dev)
2578 {
2579 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2580 struct nl_msg *msg;
2581 struct ifinfomsg ifi = {
2582 .ifi_family = AF_UNSPEC,
2583 .ifi_index = 0,
2584 };
2585 struct if_check_data chk = {
2586 .dev = dev,
2587 .pending = 1,
2588 };
2589 int ret = 1;
2590
2591 if (!cb)
2592 return ret;
2593
2594 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2595 if (!msg)
2596 goto out;
2597
2598 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2599 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2600 goto free;
2601
2602 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2603 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2604 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2605
2606 ret = nl_send_auto_complete(sock_rtnl, msg);
2607 if (ret < 0)
2608 goto free;
2609
2610 while (chk.pending > 0)
2611 nl_recvmsgs(sock_rtnl, cb);
2612
2613 ret = chk.pending;
2614
2615 free:
2616 nlmsg_free(msg);
2617 out:
2618 nl_cb_put(cb);
2619 return ret;
2620 }
2621
2622 struct device *
2623 system_if_get_parent(struct device *dev)
2624 {
2625 char buf[64], *devname;
2626 int ifindex, iflink;
2627
2628 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2629 return NULL;
2630
2631 iflink = strtoul(buf, NULL, 0);
2632 ifindex = system_if_resolve(dev);
2633 if (!iflink || iflink == ifindex)
2634 return NULL;
2635
2636 devname = if_indextoname(iflink, buf);
2637 if (!devname)
2638 return NULL;
2639
2640 return device_get(devname, true);
2641 }
2642
2643 static bool
2644 read_string_file(int dir_fd, const char *file, char *buf, int len)
2645 {
2646 bool ret = false;
2647 char *c;
2648 int fd;
2649
2650 fd = openat(dir_fd, file, O_RDONLY);
2651 if (fd < 0)
2652 return false;
2653
2654 retry:
2655 len = read(fd, buf, len - 1);
2656 if (len < 0) {
2657 if (errno == EINTR)
2658 goto retry;
2659 } else if (len > 0) {
2660 buf[len] = 0;
2661
2662 c = strchr(buf, '\n');
2663 if (c)
2664 *c = 0;
2665
2666 ret = true;
2667 }
2668
2669 close(fd);
2670
2671 return ret;
2672 }
2673
2674 static bool
2675 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2676 {
2677 char buf[64];
2678 bool ret = false;
2679
2680 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2681 if (ret)
2682 *val = strtoull(buf, NULL, 0);
2683
2684 return ret;
2685 }
2686
2687 bool
2688 system_if_force_external(const char *ifname)
2689 {
2690 struct stat s;
2691
2692 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2693 }
2694
2695 static const char *
2696 system_netdevtype_name(unsigned short dev_type)
2697 {
2698 size_t i;
2699
2700 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2701 if (netdev_types[i].id == dev_type)
2702 return netdev_types[i].name;
2703 }
2704
2705 /* the last key is used by default */
2706 i = ARRAY_SIZE(netdev_types) - 1;
2707
2708 return netdev_types[i].name;
2709 }
2710
2711 static void
2712 system_add_devtype(struct blob_buf *b, const char *ifname)
2713 {
2714 char buf[100];
2715 bool found = false;
2716
2717 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2718 const char *info = "DEVTYPE=";
2719 char *context = NULL;
2720 const char *line = strtok_r(buf, "\r\n", &context);
2721
2722 while (line != NULL) {
2723 char *index = strstr(line, info);
2724
2725 if (index != NULL) {
2726 blobmsg_add_string(b, "devtype", index + strlen(info));
2727 found = true;
2728 break;
2729 }
2730
2731 line = strtok_r(NULL, "\r\n", &context);
2732 }
2733 }
2734
2735 if (!found) {
2736 unsigned short number = 0;
2737 const char *name = NULL;
2738
2739 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2740 number = strtoul(buf, NULL, 0);
2741 name = system_netdevtype_name(number);
2742 blobmsg_add_string(b, "devtype", name);
2743 }
2744 }
2745 }
2746
2747 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2748
2749 static int32_t
2750 ethtool_feature_count(const char *ifname)
2751 {
2752 struct {
2753 struct ethtool_sset_info hdr;
2754 uint32_t buf;
2755 } req = {
2756 .hdr = {
2757 .cmd = ETHTOOL_GSSET_INFO,
2758 .sset_mask = 1 << ETH_SS_FEATURES
2759 }
2760 };
2761
2762 struct ifreq ifr = {
2763 .ifr_data = (void *)&req
2764 };
2765
2766 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2767
2768 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2769 return -1;
2770
2771 if (!req.hdr.sset_mask)
2772 return 0;
2773
2774 return req.buf;
2775 }
2776
2777 static int32_t
2778 ethtool_feature_index(const char *ifname, const char *keyname)
2779 {
2780 struct ethtool_gstrings *feature_names;
2781 struct ifreq ifr = { 0 };
2782 int32_t n_features;
2783 uint32_t i;
2784
2785 n_features = ethtool_feature_count(ifname);
2786
2787 if (n_features <= 0)
2788 return -1;
2789
2790 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2791
2792 if (!feature_names)
2793 return -1;
2794
2795 feature_names->cmd = ETHTOOL_GSTRINGS;
2796 feature_names->string_set = ETH_SS_FEATURES;
2797 feature_names->len = n_features;
2798
2799 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2800 ifr.ifr_data = (void *)feature_names;
2801
2802 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2803 free(feature_names);
2804
2805 return -1;
2806 }
2807
2808 for (i = 0; i < feature_names->len; i++)
2809 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2810 break;
2811
2812 if (i >= feature_names->len)
2813 i = -1;
2814
2815 free(feature_names);
2816
2817 return i;
2818 }
2819
2820 static bool
2821 ethtool_feature_value(const char *ifname, const char *keyname)
2822 {
2823 struct ethtool_get_features_block *feature_block;
2824 struct ethtool_gfeatures *feature_values;
2825 struct ifreq ifr = { 0 };
2826 int32_t feature_idx;
2827 bool active;
2828
2829 feature_idx = ethtool_feature_index(ifname, keyname);
2830
2831 if (feature_idx < 0)
2832 return false;
2833
2834 feature_values = calloc(1,
2835 sizeof(*feature_values) +
2836 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2837
2838 if (!feature_values)
2839 return false;
2840
2841 feature_values->cmd = ETHTOOL_GFEATURES;
2842 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2843
2844 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2845 ifr.ifr_data = (void *)feature_values;
2846
2847 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2848 free(feature_values);
2849
2850 return false;
2851 }
2852
2853 feature_block = &feature_values->features[feature_idx / 32];
2854 active = feature_block->active & (1U << feature_idx % 32);
2855
2856 free(feature_values);
2857
2858 return active;
2859 }
2860
2861 static void
2862 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2863 {
2864 char *buf;
2865
2866 /* allocate string buffer large enough for the mode name and a suffix
2867 * "-F" or "-H" indicating full duplex or half duplex.
2868 */
2869 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2870 if (!buf)
2871 return;
2872
2873 strcpy(buf, ethtool_modes[i].name);
2874 if (half)
2875 strcat(buf, "-H");
2876 else
2877 strcat(buf, "-F");
2878
2879 blobmsg_add_string_buffer(b);
2880 }
2881
2882 static void
2883 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2884 {
2885 size_t i;
2886
2887 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2888 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2889 system_add_link_mode_name(b, i, true);
2890
2891 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2892 system_add_link_mode_name(b, i, false);
2893 }
2894 }
2895
2896 static void
2897 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2898 {
2899 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2900 blobmsg_add_string(b, NULL, "pause");
2901
2902 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2903 blobmsg_add_string(b, NULL, "asym_pause");
2904 }
2905
2906
2907 static void
2908 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2909 __u32 *advertising, __u32 *lp_advertising)
2910 {
2911 bool an_rx = false, an_tx = false;
2912 void *d;
2913
2914 d = blobmsg_open_array(b, "negotiated");
2915
2916 /* Work out negotiated pause frame usage per
2917 * IEEE 802.3-2005 table 28B-3.
2918 */
2919 if (ethtool_link_mode_test_bit(nwords,
2920 ETHTOOL_LINK_MODE_Pause_BIT,
2921 advertising) &&
2922 ethtool_link_mode_test_bit(nwords,
2923 ETHTOOL_LINK_MODE_Pause_BIT,
2924 lp_advertising)) {
2925 an_tx = true;
2926 an_rx = true;
2927 } else if (ethtool_link_mode_test_bit(nwords,
2928 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2929 advertising) &&
2930 ethtool_link_mode_test_bit(nwords,
2931 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2932 lp_advertising)) {
2933 if (ethtool_link_mode_test_bit(nwords,
2934 ETHTOOL_LINK_MODE_Pause_BIT,
2935 advertising))
2936 an_rx = true;
2937 else if (ethtool_link_mode_test_bit(nwords,
2938 ETHTOOL_LINK_MODE_Pause_BIT,
2939 lp_advertising))
2940 an_tx = true;
2941 }
2942 if (an_tx)
2943 blobmsg_add_string(b, NULL, "rx");
2944
2945 if (an_rx)
2946 blobmsg_add_string(b, NULL, "tx");
2947
2948 blobmsg_close_array(b, d);
2949 }
2950
2951 static void
2952 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2953 {
2954 struct ethtool_pauseparam pp;
2955 struct ifreq ifr = {
2956 .ifr_data = (caddr_t)&pp,
2957 };
2958
2959 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2960 memset(&pp, 0, sizeof(pp));
2961 pp.cmd = ETHTOOL_GPAUSEPARAM;
2962
2963 /* may fail */
2964 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2965 *pause_autoneg = true;
2966 return;
2967 }
2968
2969 *rx_pause = pp.rx_pause;
2970 *tx_pause = pp.tx_pause;
2971 *pause_autoneg = pp.autoneg;
2972 }
2973
2974 int
2975 system_if_dump_info(struct device *dev, struct blob_buf *b)
2976 {
2977 __u32 *supported, *advertising, *lp_advertising;
2978 bool rx_pause, tx_pause, pause_autoneg;
2979 struct {
2980 struct ethtool_link_settings req;
2981 __u32 link_mode_data[3 * 127];
2982 } ecmd;
2983 struct ifreq ifr = {
2984 .ifr_data = (caddr_t)&ecmd,
2985 };
2986 __s8 nwords;
2987 void *c, *d;
2988 char *s;
2989
2990 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
2991
2992 memset(&ecmd, 0, sizeof(ecmd));
2993 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2994 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2995
2996 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2997 ecmd.req.link_mode_masks_nwords >= 0 ||
2998 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2999 return -EOPNOTSUPP;
3000
3001 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
3002
3003 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3004 ecmd.req.link_mode_masks_nwords <= 0 ||
3005 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3006 return -EIO;
3007
3008 nwords = ecmd.req.link_mode_masks_nwords;
3009 supported = &ecmd.link_mode_data[0];
3010 advertising = &ecmd.link_mode_data[nwords];
3011 lp_advertising = &ecmd.link_mode_data[2 * nwords];
3012
3013 c = blobmsg_open_array(b, "link-advertising");
3014 system_add_link_modes(nwords, b, advertising);
3015 blobmsg_close_array(b, c);
3016
3017 c = blobmsg_open_array(b, "link-partner-advertising");
3018 system_add_link_modes(nwords, b, lp_advertising);
3019 blobmsg_close_array(b, c);
3020
3021 c = blobmsg_open_array(b, "link-supported");
3022 system_add_link_modes(nwords, b, supported);
3023 blobmsg_close_array(b, c);
3024
3025 if (ethtool_validate_speed(ecmd.req.speed) &&
3026 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
3027 (ecmd.req.speed != 0)) {
3028 s = blobmsg_alloc_string_buffer(b, "speed", 10);
3029 snprintf(s, 8, "%d%c", ecmd.req.speed,
3030 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
3031 blobmsg_add_string_buffer(b);
3032 }
3033 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
3034
3035 c = blobmsg_open_table(b, "flow-control");
3036 blobmsg_add_u8(b, "autoneg", pause_autoneg);
3037
3038 d = blobmsg_open_array(b, "supported");
3039 system_add_pause_modes(nwords, b, supported);
3040 blobmsg_close_array(b, d);
3041
3042 if (pause_autoneg) {
3043 d = blobmsg_open_array(b, "link-advertising");
3044 system_add_pause_modes(nwords, b, advertising);
3045 blobmsg_close_array(b, d);
3046 }
3047
3048 d = blobmsg_open_array(b, "link-partner-advertising");
3049 system_add_pause_modes(nwords, b, lp_advertising);
3050 blobmsg_close_array(b, d);
3051
3052 if (pause_autoneg) {
3053 system_add_ethtool_pause_an(b, nwords, advertising,
3054 lp_advertising);
3055 } else {
3056 d = blobmsg_open_array(b, "selected");
3057 if (rx_pause)
3058 blobmsg_add_string(b, NULL, "rx");
3059
3060 if (tx_pause)
3061 blobmsg_add_string(b, NULL, "tx");
3062
3063 blobmsg_close_array(b, d);
3064 }
3065
3066 blobmsg_close_table(b, c);
3067
3068 blobmsg_add_u8(b, "hw-tc-offload",
3069 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
3070
3071 system_add_devtype(b, dev->ifname);
3072
3073 return 0;
3074 }
3075
3076 int
3077 system_if_dump_stats(struct device *dev, struct blob_buf *b)
3078 {
3079 const char *const counters[] = {
3080 "collisions", "rx_frame_errors", "tx_compressed",
3081 "multicast", "rx_length_errors", "tx_dropped",
3082 "rx_bytes", "rx_missed_errors", "tx_errors",
3083 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
3084 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
3085 "rx_dropped", "tx_aborted_errors", "tx_packets",
3086 "rx_errors", "tx_bytes", "tx_window_errors",
3087 "rx_fifo_errors", "tx_carrier_errors",
3088 };
3089 int stats_dir;
3090 size_t i;
3091 uint64_t val = 0;
3092
3093 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
3094 if (stats_dir < 0)
3095 return -1;
3096
3097 for (i = 0; i < ARRAY_SIZE(counters); i++)
3098 if (read_uint64_file(stats_dir, counters[i], &val))
3099 blobmsg_add_u64(b, counters[i], val);
3100
3101 close(stats_dir);
3102 return 0;
3103 }
3104
3105 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
3106 {
3107 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
3108 int alen = v4 ? 4 : 16;
3109 unsigned int flags = 0;
3110 struct ifaddrmsg ifa = {
3111 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
3112 .ifa_prefixlen = addr->mask,
3113 .ifa_index = dev->ifindex,
3114 };
3115
3116 struct nl_msg *msg;
3117 if (cmd == RTM_NEWADDR)
3118 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3119
3120 msg = nlmsg_alloc_simple(cmd, flags);
3121 if (!msg)
3122 return -1;
3123
3124 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
3125 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
3126 if (v4) {
3127 if (addr->broadcast)
3128 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
3129 if (addr->point_to_point)
3130 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
3131 } else {
3132 time_t now = system_get_rtime();
3133 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
3134
3135 if (addr->preferred_until) {
3136 int64_t preferred = addr->preferred_until - now;
3137 if (preferred < 0)
3138 preferred = 0;
3139 else if (preferred > UINT32_MAX)
3140 preferred = UINT32_MAX;
3141
3142 cinfo.ifa_prefered = preferred;
3143 }
3144
3145 if (addr->valid_until) {
3146 int64_t valid = addr->valid_until - now;
3147 if (valid <= 0) {
3148 nlmsg_free(msg);
3149 return -1;
3150 }
3151 else if (valid > UINT32_MAX)
3152 valid = UINT32_MAX;
3153
3154 cinfo.ifa_valid = valid;
3155 }
3156
3157 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
3158
3159 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
3160 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
3161 }
3162
3163 return system_rtnl_call(msg);
3164 }
3165
3166 int system_add_address(struct device *dev, struct device_addr *addr)
3167 {
3168 return system_addr(dev, addr, RTM_NEWADDR);
3169 }
3170
3171 int system_del_address(struct device *dev, struct device_addr *addr)
3172 {
3173 return system_addr(dev, addr, RTM_DELADDR);
3174 }
3175
3176 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
3177 {
3178 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3179 unsigned int flags = 0;
3180 struct ndmsg ndm = {
3181 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
3182 .ndm_ifindex = dev->ifindex,
3183 .ndm_state = NUD_PERMANENT,
3184 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
3185 };
3186 struct nl_msg *msg;
3187
3188 if (cmd == RTM_NEWNEIGH)
3189 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3190
3191 msg = nlmsg_alloc_simple(cmd, flags);
3192
3193 if (!msg)
3194 return -1;
3195
3196 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
3197
3198 nla_put(msg, NDA_DST, alen, &neighbor->addr);
3199 if (neighbor->flags & DEVNEIGH_MAC)
3200 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
3201
3202
3203 return system_rtnl_call(msg);
3204 }
3205
3206 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
3207 {
3208 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
3209 }
3210
3211 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
3212 {
3213 return system_neigh(dev, neighbor, RTM_DELNEIGH);
3214 }
3215
3216 static int system_rt(struct device *dev, struct device_route *route, int cmd)
3217 {
3218 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3219 bool have_gw;
3220 unsigned int flags = 0;
3221
3222 if (alen == 4)
3223 have_gw = !!route->nexthop.in.s_addr;
3224 else
3225 have_gw = route->nexthop.in6.s6_addr32[0] ||
3226 route->nexthop.in6.s6_addr32[1] ||
3227 route->nexthop.in6.s6_addr32[2] ||
3228 route->nexthop.in6.s6_addr32[3];
3229
3230 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
3231 ? route->table : RT_TABLE_MAIN;
3232
3233 struct rtmsg rtm = {
3234 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3235 .rtm_dst_len = route->mask,
3236 .rtm_src_len = route->sourcemask,
3237 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
3238 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
3239 .rtm_scope = RT_SCOPE_NOWHERE,
3240 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
3241 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
3242 };
3243 struct nl_msg *msg;
3244
3245 if (cmd == RTM_NEWROUTE) {
3246 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3247
3248 if (!dev) { /* Add null-route */
3249 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3250 rtm.rtm_type = RTN_UNREACHABLE;
3251 }
3252 else
3253 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3254 }
3255
3256 if (route->flags & DEVROUTE_TYPE) {
3257 rtm.rtm_type = route->type;
3258 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3259 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3260 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3261 rtm.rtm_table = RT_TABLE_LOCAL;
3262 }
3263
3264 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3265 rtm.rtm_scope = RT_SCOPE_HOST;
3266 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3267 rtm.rtm_type == RTN_ANYCAST) {
3268 rtm.rtm_scope = RT_SCOPE_LINK;
3269 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3270 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3271 rtm.rtm_type == RTN_THROW) {
3272 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3273 dev = NULL;
3274 }
3275 }
3276
3277 if (route->flags & DEVROUTE_NODEV)
3278 dev = NULL;
3279
3280 msg = nlmsg_alloc_simple(cmd, flags);
3281 if (!msg)
3282 return -1;
3283
3284 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3285
3286 if (route->mask)
3287 nla_put(msg, RTA_DST, alen, &route->addr);
3288
3289 if (route->sourcemask) {
3290 if (rtm.rtm_family == AF_INET)
3291 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3292 else
3293 nla_put(msg, RTA_SRC, alen, &route->source);
3294 }
3295
3296 if (route->metric > 0)
3297 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3298
3299 if (have_gw)
3300 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3301
3302 if (dev)
3303 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3304
3305 if (table >= 256)
3306 nla_put_u32(msg, RTA_TABLE, table);
3307
3308 if (route->flags & DEVROUTE_MTU) {
3309 struct nlattr *metrics;
3310
3311 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3312 goto nla_put_failure;
3313
3314 nla_put_u32(msg, RTAX_MTU, route->mtu);
3315
3316 nla_nest_end(msg, metrics);
3317 }
3318
3319 return system_rtnl_call(msg);
3320
3321 nla_put_failure:
3322 nlmsg_free(msg);
3323 return -ENOMEM;
3324 }
3325
3326 int system_add_route(struct device *dev, struct device_route *route)
3327 {
3328 return system_rt(dev, route, RTM_NEWROUTE);
3329 }
3330
3331 int system_del_route(struct device *dev, struct device_route *route)
3332 {
3333 return system_rt(dev, route, RTM_DELROUTE);
3334 }
3335
3336 int system_flush_routes(void)
3337 {
3338 const char *names[] = { "ipv4", "ipv6" };
3339 size_t i;
3340 int fd;
3341
3342 for (i = 0; i < ARRAY_SIZE(names); i++) {
3343 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3344 fd = open(dev_buf, O_WRONLY);
3345 if (fd < 0)
3346 continue;
3347
3348 if (write(fd, "-1", 2)) {}
3349 close(fd);
3350 }
3351 return 0;
3352 }
3353
3354 bool system_resolve_rt_type(const char *type, unsigned int *id)
3355 {
3356 return system_rtn_aton(type, id);
3357 }
3358
3359 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3360 {
3361 FILE *f;
3362 char *e, buf[128];
3363 unsigned int n, proto = 256;
3364 n = strtoul(type, &e, 0);
3365 if (!*e && e != type)
3366 proto = n;
3367 else if (!strcmp(type, "unspec"))
3368 proto = RTPROT_UNSPEC;
3369 else if (!strcmp(type, "kernel"))
3370 proto = RTPROT_KERNEL;
3371 else if (!strcmp(type, "boot"))
3372 proto = RTPROT_BOOT;
3373 else if (!strcmp(type, "static"))
3374 proto = RTPROT_STATIC;
3375 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3376 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3377 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3378 continue;
3379
3380 n = strtoul(e, NULL, 10);
3381 e = strtok(NULL, " \t\n");
3382
3383 if (e && !strcmp(e, type)) {
3384 proto = n;
3385 break;
3386 }
3387 }
3388 fclose(f);
3389 }
3390
3391 if (proto > 255)
3392 return false;
3393
3394 *id = proto;
3395 return true;
3396 }
3397
3398 bool system_resolve_rt_table(const char *name, unsigned int *id)
3399 {
3400 FILE *f;
3401 char *e, buf[128];
3402 unsigned int n, table = RT_TABLE_UNSPEC;
3403
3404 /* first try to parse table as number */
3405 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3406 table = n;
3407
3408 /* handle well known aliases */
3409 else if (!strcmp(name, "default"))
3410 table = RT_TABLE_DEFAULT;
3411 else if (!strcmp(name, "main"))
3412 table = RT_TABLE_MAIN;
3413 else if (!strcmp(name, "local"))
3414 table = RT_TABLE_LOCAL;
3415
3416 /* try to look up name in /etc/iproute2/rt_tables */
3417 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3418 {
3419 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3420 {
3421 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3422 continue;
3423
3424 n = strtoul(e, NULL, 10);
3425 e = strtok(NULL, " \t\n");
3426
3427 if (e && !strcmp(e, name))
3428 {
3429 table = n;
3430 break;
3431 }
3432 }
3433
3434 fclose(f);
3435 }
3436
3437 if (table == RT_TABLE_UNSPEC)
3438 return false;
3439
3440 *id = table;
3441 return true;
3442 }
3443
3444 bool system_is_default_rt_table(unsigned int id)
3445 {
3446 return (id == RT_TABLE_MAIN);
3447 }
3448
3449 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3450 {
3451 char *e;
3452 unsigned int n;
3453
3454 if (!strcmp(filter, "strict"))
3455 n = 1;
3456 else if (!strcmp(filter, "loose"))
3457 n = 2;
3458 else {
3459 n = strtoul(filter, &e, 0);
3460 if (*e || e == filter || n > 2)
3461 return false;
3462 }
3463
3464 *id = n;
3465 return true;
3466 }
3467
3468 static int system_iprule(struct iprule *rule, int cmd)
3469 {
3470 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3471
3472 struct nl_msg *msg;
3473 struct rtmsg rtm = {
3474 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3475 .rtm_protocol = RTPROT_STATIC,
3476 .rtm_scope = RT_SCOPE_UNIVERSE,
3477 .rtm_table = RT_TABLE_UNSPEC,
3478 .rtm_type = RTN_UNSPEC,
3479 .rtm_flags = 0,
3480 };
3481
3482 if (cmd == RTM_NEWRULE)
3483 rtm.rtm_type = RTN_UNICAST;
3484
3485 if (rule->invert)
3486 rtm.rtm_flags |= FIB_RULE_INVERT;
3487
3488 if (rule->flags & IPRULE_SRC)
3489 rtm.rtm_src_len = rule->src_mask;
3490
3491 if (rule->flags & IPRULE_DEST)
3492 rtm.rtm_dst_len = rule->dest_mask;
3493
3494 if (rule->flags & IPRULE_TOS)
3495 rtm.rtm_tos = rule->tos;
3496
3497 if (rule->flags & IPRULE_LOOKUP) {
3498 if (rule->lookup < 256)
3499 rtm.rtm_table = rule->lookup;
3500 }
3501
3502 if (rule->flags & IPRULE_ACTION)
3503 rtm.rtm_type = rule->action;
3504 else if (rule->flags & IPRULE_GOTO)
3505 rtm.rtm_type = FR_ACT_GOTO;
3506 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3507 rtm.rtm_type = FR_ACT_NOP;
3508
3509 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3510
3511 if (!msg)
3512 return -1;
3513
3514 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3515
3516 if (rule->flags & IPRULE_IN)
3517 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3518
3519 if (rule->flags & IPRULE_OUT)
3520 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3521
3522 if (rule->flags & IPRULE_SRC)
3523 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3524
3525 if (rule->flags & IPRULE_DEST)
3526 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3527
3528 if (rule->flags & IPRULE_PRIORITY)
3529 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3530 else if (cmd == RTM_NEWRULE)
3531 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3532
3533 if (rule->flags & IPRULE_FWMARK)
3534 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3535
3536 if (rule->flags & IPRULE_FWMASK)
3537 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3538
3539 if (rule->flags & IPRULE_LOOKUP) {
3540 if (rule->lookup >= 256)
3541 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3542 }
3543
3544 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3545 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3546
3547 if (rule->flags & IPRULE_UIDRANGE) {
3548 struct fib_rule_uid_range uidrange = {
3549 .start = rule->uidrange_start,
3550 .end = rule->uidrange_end
3551 };
3552
3553 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3554 }
3555
3556 if (rule->flags & IPRULE_GOTO)
3557 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3558
3559 return system_rtnl_call(msg);
3560 }
3561
3562 int system_add_iprule(struct iprule *rule)
3563 {
3564 return system_iprule(rule, RTM_NEWRULE);
3565 }
3566
3567 int system_del_iprule(struct iprule *rule)
3568 {
3569 return system_iprule(rule, RTM_DELRULE);
3570 }
3571
3572 int system_flush_iprules(void)
3573 {
3574 int rv = 0;
3575 struct iprule rule;
3576
3577 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3578 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3579
3580 memset(&rule, 0, sizeof(rule));
3581
3582
3583 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3584
3585 rule.priority = 0;
3586 rule.lookup = RT_TABLE_LOCAL;
3587 rv |= system_iprule(&rule, RTM_NEWRULE);
3588
3589 rule.priority = 32766;
3590 rule.lookup = RT_TABLE_MAIN;
3591 rv |= system_iprule(&rule, RTM_NEWRULE);
3592
3593 rule.priority = 32767;
3594 rule.lookup = RT_TABLE_DEFAULT;
3595 rv |= system_iprule(&rule, RTM_NEWRULE);
3596
3597
3598 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3599
3600 rule.priority = 0;
3601 rule.lookup = RT_TABLE_LOCAL;
3602 rv |= system_iprule(&rule, RTM_NEWRULE);
3603
3604 rule.priority = 32766;
3605 rule.lookup = RT_TABLE_MAIN;
3606 rv |= system_iprule(&rule, RTM_NEWRULE);
3607
3608 return rv;
3609 }
3610
3611 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3612 {
3613 return system_rtn_aton(action, id);
3614 }
3615
3616 time_t system_get_rtime(void)
3617 {
3618 struct timespec ts;
3619 struct timeval tv;
3620
3621 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3622 return ts.tv_sec;
3623
3624 if (gettimeofday(&tv, NULL) == 0)
3625 return tv.tv_sec;
3626
3627 return 0;
3628 }
3629
3630 #ifndef IP_DF
3631 #define IP_DF 0x4000
3632 #endif
3633
3634 static int tunnel_ioctl(const char *name, int cmd, void *p)
3635 {
3636 struct ifreq ifr;
3637
3638 memset(&ifr, 0, sizeof(ifr));
3639 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3640 ifr.ifr_ifru.ifru_data = p;
3641 return ioctl(sock_ioctl, cmd, &ifr);
3642 }
3643
3644 #ifdef IFLA_IPTUN_MAX
3645 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3646 struct blob_attr **tb)
3647 {
3648 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3649 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3650 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3651 struct blob_attr *cur;
3652 int ret = 0, ttl = 0;
3653
3654 if (!nlm)
3655 return -1;
3656
3657 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3658 nla_put_string(nlm, IFLA_IFNAME, name);
3659
3660 if (link)
3661 nla_put_u32(nlm, IFLA_LINK, link);
3662
3663 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3664 if (!linkinfo) {
3665 ret = -ENOMEM;
3666 goto failure;
3667 }
3668
3669 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3670 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3671 if (!infodata) {
3672 ret = -ENOMEM;
3673 goto failure;
3674 }
3675
3676 if (link)
3677 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3678
3679 if ((cur = tb[TUNNEL_ATTR_TTL]))
3680 ttl = blobmsg_get_u32(cur);
3681
3682 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3683 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3684
3685 struct in6_addr in6buf;
3686 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3687 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3688 ret = -EINVAL;
3689 goto failure;
3690 }
3691 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3692 }
3693
3694 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3695 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3696 ret = -EINVAL;
3697 goto failure;
3698 }
3699 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3700 }
3701
3702 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3703 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3704 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3705
3706 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3707 blobmsg_data(cur), blobmsg_len(cur));
3708
3709 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3710 char *str = blobmsg_get_string(cur);
3711
3712 if (strcmp(str, "ignore")) {
3713 char *e;
3714 unsigned encap_limit = strtoul(str, &e, 0);
3715
3716 if (e == str || *e || encap_limit > 255) {
3717 ret = -EINVAL;
3718 goto failure;
3719 }
3720
3721 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3722 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3723 }
3724 }
3725
3726 #ifdef IFLA_IPTUN_FMR_MAX
3727 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3728 struct blob_attr *rcur;
3729 unsigned rrem, fmrcnt = 0;
3730 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3731
3732 if (!fmrs) {
3733 ret = -ENOMEM;
3734 goto failure;
3735 }
3736
3737 blobmsg_for_each_attr(rcur, cur, rrem) {
3738 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3739 struct in6_addr ip6prefix;
3740 struct in_addr ip4prefix;
3741 unsigned ip4len, ip6len, ealen, offset;
3742
3743 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3744 blobmsg_data(rcur), blobmsg_len(rcur));
3745
3746 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3747 !parse_ip_and_netmask(AF_INET6,
3748 blobmsg_data(tb_cur), &ip6prefix,
3749 &ip6len)) {
3750 ret = -EINVAL;
3751 goto failure;
3752 }
3753
3754 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3755 !parse_ip_and_netmask(AF_INET,
3756 blobmsg_data(tb_cur), &ip4prefix,
3757 &ip4len)) {
3758 ret = -EINVAL;
3759 goto failure;
3760 }
3761
3762 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3763 ret = -EINVAL;
3764 goto failure;
3765 }
3766 ealen = blobmsg_get_u32(tb_cur);
3767
3768 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3769 ret = -EINVAL;
3770 goto failure;
3771 }
3772 offset = blobmsg_get_u32(tb_cur);
3773
3774 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3775 if (!rule) {
3776 ret = -ENOMEM;
3777 goto failure;
3778 }
3779
3780 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3781 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3782 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3783 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3784 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3785 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3786
3787 nla_nest_end(nlm, rule);
3788 }
3789
3790 nla_nest_end(nlm, fmrs);
3791 }
3792 #endif
3793 if (tun_flags)
3794 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3795 }
3796
3797 nla_nest_end(nlm, infodata);
3798 nla_nest_end(nlm, linkinfo);
3799
3800 return system_rtnl_call(nlm);
3801
3802 failure:
3803 nlmsg_free(nlm);
3804 return ret;
3805 }
3806 #endif
3807
3808 #ifdef IFLA_IPTUN_MAX
3809 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3810 static int system_add_gre_tunnel(const char *name, const char *kind,
3811 const unsigned int link, struct blob_attr **tb, bool v6)
3812 {
3813 struct nl_msg *nlm;
3814 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3815 struct blob_attr *cur;
3816 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3817 uint16_t iflags = 0, oflags = 0;
3818 uint8_t tos = 0;
3819 int ret = 0, ttl = 0;
3820 unsigned encap_limit = 0;
3821
3822 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3823 if (!nlm)
3824 return -1;
3825
3826 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3827 nla_put_string(nlm, IFLA_IFNAME, name);
3828
3829 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3830 if (!linkinfo) {
3831 ret = -ENOMEM;
3832 goto failure;
3833 }
3834
3835 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3836 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3837 if (!infodata) {
3838 ret = -ENOMEM;
3839 goto failure;
3840 }
3841
3842 if (link)
3843 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3844
3845 if ((cur = tb[TUNNEL_ATTR_TTL]))
3846 ttl = blobmsg_get_u32(cur);
3847
3848 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3849 char *str = blobmsg_get_string(cur);
3850 if (strcmp(str, "inherit")) {
3851 unsigned uval;
3852
3853 if (!system_tos_aton(str, &uval)) {
3854 ret = -EINVAL;
3855 goto failure;
3856 }
3857
3858 if (v6)
3859 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3860 else
3861 tos = uval;
3862 } else {
3863 if (v6)
3864 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3865 else
3866 tos = 1;
3867 }
3868 }
3869
3870 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3871 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3872
3873 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3874 blobmsg_data(cur), blobmsg_len(cur));
3875
3876 if ((cur = tb_data[GRE_DATA_IKEY])) {
3877 if ((ikey = blobmsg_get_u32(cur)))
3878 iflags |= GRE_KEY;
3879 }
3880
3881 if ((cur = tb_data[GRE_DATA_OKEY])) {
3882 if ((okey = blobmsg_get_u32(cur)))
3883 oflags |= GRE_KEY;
3884 }
3885
3886 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3887 if (blobmsg_get_bool(cur))
3888 iflags |= GRE_CSUM;
3889 }
3890
3891 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3892 if (blobmsg_get_bool(cur))
3893 oflags |= GRE_CSUM;
3894 }
3895
3896 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3897 if (blobmsg_get_bool(cur))
3898 iflags |= GRE_SEQ;
3899 }
3900
3901 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3902 if (blobmsg_get_bool(cur))
3903 oflags |= GRE_SEQ;
3904 }
3905
3906 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3907 char *str = blobmsg_get_string(cur);
3908
3909 if (strcmp(str, "ignore")) {
3910 char *e;
3911
3912 encap_limit = strtoul(str, &e, 0);
3913
3914 if (e == str || *e || encap_limit > 255) {
3915 ret = -EINVAL;
3916 goto failure;
3917 }
3918
3919 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3920 }
3921 }
3922 }
3923
3924 if (v6) {
3925 struct in6_addr in6buf;
3926 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3927 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3928 ret = -EINVAL;
3929 goto failure;
3930 }
3931 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3932 }
3933
3934 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3935 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3936 ret = -EINVAL;
3937 goto failure;
3938 }
3939 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3940 }
3941
3942 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3943 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3944
3945 if (flowinfo)
3946 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3947
3948 if (flags6)
3949 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3950
3951 if (!ttl)
3952 ttl = 64;
3953 } else {
3954 struct in_addr inbuf;
3955 bool set_df = true;
3956
3957 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3958 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3959 ret = -EINVAL;
3960 goto failure;
3961 }
3962 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3963 }
3964
3965 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3966 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3967 ret = -EINVAL;
3968 goto failure;
3969 }
3970 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3971
3972 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3973 if (!okey) {
3974 okey = inbuf.s_addr;
3975 oflags |= GRE_KEY;
3976 }
3977
3978 if (!ikey) {
3979 ikey = inbuf.s_addr;
3980 iflags |= GRE_KEY;
3981 }
3982 }
3983 }
3984
3985 if ((cur = tb[TUNNEL_ATTR_DF]))
3986 set_df = blobmsg_get_bool(cur);
3987
3988 if (!set_df) {
3989 /* ttl != 0 and nopmtudisc are incompatible */
3990 if (ttl) {
3991 ret = -EINVAL;
3992 goto failure;
3993 }
3994 } else if (!ttl)
3995 ttl = 64;
3996
3997 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3998
3999 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
4000 }
4001
4002 if (ttl)
4003 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
4004
4005 if (oflags)
4006 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
4007
4008 if (iflags)
4009 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
4010
4011 if (okey)
4012 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
4013
4014 if (ikey)
4015 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
4016
4017 nla_nest_end(nlm, infodata);
4018 nla_nest_end(nlm, linkinfo);
4019
4020 return system_rtnl_call(nlm);
4021
4022 failure:
4023 nlmsg_free(nlm);
4024 return ret;
4025 }
4026 #endif
4027
4028 #ifdef IFLA_VTI_MAX
4029 static int system_add_vti_tunnel(const char *name, const char *kind,
4030 const unsigned int link, struct blob_attr **tb, bool v6)
4031 {
4032 struct nl_msg *nlm;
4033 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4034 struct blob_attr *cur;
4035 int ret = 0;
4036
4037 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4038 if (!nlm)
4039 return -1;
4040
4041 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4042 nla_put_string(nlm, IFLA_IFNAME, name);
4043
4044 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4045 if (!linkinfo) {
4046 ret = -ENOMEM;
4047 goto failure;
4048 }
4049
4050 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4051 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4052 if (!infodata) {
4053 ret = -ENOMEM;
4054 goto failure;
4055 }
4056
4057 if (link)
4058 nla_put_u32(nlm, IFLA_VTI_LINK, link);
4059
4060 if (v6) {
4061 struct in6_addr in6buf;
4062 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4063 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4064 ret = -EINVAL;
4065 goto failure;
4066 }
4067 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
4068 }
4069
4070 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4071 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4072 ret = -EINVAL;
4073 goto failure;
4074 }
4075 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
4076 }
4077
4078 } else {
4079 struct in_addr inbuf;
4080
4081 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4082 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4083 ret = -EINVAL;
4084 goto failure;
4085 }
4086 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
4087 }
4088
4089 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4090 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4091 ret = -EINVAL;
4092 goto failure;
4093 }
4094 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
4095 }
4096
4097 }
4098
4099 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4100 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
4101 uint32_t ikey = 0, okey = 0;
4102
4103 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
4104 blobmsg_data(cur), blobmsg_len(cur));
4105
4106 if ((cur = tb_data[VTI_DATA_IKEY])) {
4107 if ((ikey = blobmsg_get_u32(cur)))
4108 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
4109 }
4110
4111 if ((cur = tb_data[VTI_DATA_OKEY])) {
4112 if ((okey = blobmsg_get_u32(cur)))
4113 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
4114 }
4115 }
4116
4117 nla_nest_end(nlm, infodata);
4118 nla_nest_end(nlm, linkinfo);
4119
4120 return system_rtnl_call(nlm);
4121
4122 failure:
4123 nlmsg_free(nlm);
4124 return ret;
4125 }
4126 #endif
4127
4128 #ifdef IFLA_XFRM_MAX
4129 static int system_add_xfrm_tunnel(const char *name, const char *kind,
4130 const unsigned int link, struct blob_attr **tb)
4131 {
4132 struct nl_msg *nlm;
4133 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4134 struct blob_attr *cur;
4135 int ret = 0;
4136
4137 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4138 if (!nlm)
4139 return -1;
4140
4141 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4142 nla_put_string(nlm, IFLA_IFNAME, name);
4143
4144 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4145 if (!linkinfo) {
4146 ret = -ENOMEM;
4147 goto failure;
4148 }
4149
4150 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4151 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4152 if (!infodata) {
4153 ret = -ENOMEM;
4154 goto failure;
4155 }
4156
4157 if (link)
4158 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
4159
4160 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4161 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
4162 uint32_t if_id = 0;
4163
4164 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
4165 blobmsg_data(cur), blobmsg_len(cur));
4166
4167 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
4168 if ((if_id = blobmsg_get_u32(cur)))
4169 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
4170 }
4171
4172 }
4173
4174 nla_nest_end(nlm, infodata);
4175 nla_nest_end(nlm, linkinfo);
4176
4177 return system_rtnl_call(nlm);
4178
4179 failure:
4180 nlmsg_free(nlm);
4181 return ret;
4182 }
4183 #endif
4184
4185 #ifdef IFLA_VXLAN_MAX
4186 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
4187 struct blob_attr *cur;
4188 if ((cur = tb_data[vxlandatatype])) {
4189 bool val = blobmsg_get_bool(cur);
4190 if (invert)
4191 val = !val;
4192
4193 if ((attrtype == IFLA_VXLAN_GBP) && val)
4194 nla_put_flag(msg, attrtype);
4195 else
4196 nla_put_u8(msg, attrtype, val);
4197
4198 }
4199 }
4200
4201 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
4202 {
4203 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
4204 struct nl_msg *msg;
4205 struct nlattr *linkinfo, *data;
4206 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
4207 struct blob_attr *cur;
4208 int ret = 0;
4209
4210 if ((cur = tb[TUNNEL_ATTR_DATA]))
4211 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
4212 blobmsg_data(cur), blobmsg_len(cur));
4213 else
4214 return -EINVAL;
4215
4216 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
4217
4218 if (!msg)
4219 return -1;
4220
4221 nlmsg_append(msg, &iim, sizeof(iim), 0);
4222
4223 nla_put_string(msg, IFLA_IFNAME, name);
4224
4225 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
4226 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
4227 if (!ea) {
4228 ret = -EINVAL;
4229 goto failure;
4230 }
4231
4232 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
4233 }
4234
4235 if ((cur = tb[TUNNEL_ATTR_MTU])) {
4236 uint32_t mtu = blobmsg_get_u32(cur);
4237 nla_put_u32(msg, IFLA_MTU, mtu);
4238 }
4239
4240 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
4241 ret = -ENOMEM;
4242 goto failure;
4243 }
4244
4245 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
4246
4247 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
4248 ret = -ENOMEM;
4249 goto failure;
4250 }
4251
4252 if (link)
4253 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
4254
4255 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4256 uint32_t id = blobmsg_get_u32(cur);
4257 if (id >= (1u << 24) - 1) {
4258 ret = -EINVAL;
4259 goto failure;
4260 }
4261
4262 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4263 }
4264
4265 if (v6) {
4266 struct in6_addr in6buf;
4267 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4268 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4269 ret = -EINVAL;
4270 goto failure;
4271 }
4272 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4273 }
4274
4275 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4276 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4277 ret = -EINVAL;
4278 goto failure;
4279 }
4280 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4281 }
4282 } else {
4283 struct in_addr inbuf;
4284
4285 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4286 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4287 ret = -EINVAL;
4288 goto failure;
4289 }
4290 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4291 }
4292
4293 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4294 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4295 ret = -EINVAL;
4296 goto failure;
4297 }
4298 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4299 }
4300 }
4301
4302 uint32_t port = 4789;
4303 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4304 port = blobmsg_get_u32(cur);
4305 if (port < 1 || port > 65535) {
4306 ret = -EINVAL;
4307 goto failure;
4308 }
4309 }
4310 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4311
4312 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4313 struct ifla_vxlan_port_range srcports = {0,0};
4314
4315 uint32_t low = blobmsg_get_u32(cur);
4316 if (low < 1 || low > 65535 - 1) {
4317 ret = -EINVAL;
4318 goto failure;
4319 }
4320
4321 srcports.low = htons((uint16_t) low);
4322 srcports.high = htons((uint16_t) (low+1));
4323
4324 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4325 uint32_t high = blobmsg_get_u32(cur);
4326 if (high < 1 || high > 65535) {
4327 ret = -EINVAL;
4328 goto failure;
4329 }
4330
4331 if (high > low)
4332 srcports.high = htons((uint16_t) high);
4333 }
4334
4335 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4336 }
4337
4338 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4339 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4340 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4341 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4342 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4343 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4344 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4345 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4346 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4347
4348 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4349 uint32_t ageing = blobmsg_get_u32(cur);
4350 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4351 }
4352
4353 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4354 uint32_t maxaddress = blobmsg_get_u32(cur);
4355 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4356 }
4357
4358 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4359 char *str = blobmsg_get_string(cur);
4360 unsigned tos = 1;
4361
4362 if (strcmp(str, "inherit")) {
4363 if (!system_tos_aton(str, &tos)) {
4364 ret = -EINVAL;
4365 goto failure;
4366 }
4367 }
4368
4369 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4370 }
4371
4372 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4373 uint32_t ttl = blobmsg_get_u32(cur);
4374 if (ttl < 1 || ttl > 255) {
4375 ret = -EINVAL;
4376 goto failure;
4377 }
4378
4379 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4380 }
4381
4382 nla_nest_end(msg, data);
4383 nla_nest_end(msg, linkinfo);
4384
4385 ret = system_rtnl_call(msg);
4386 if (ret)
4387 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
4388
4389 return ret;
4390
4391 failure:
4392 nlmsg_free(msg);
4393 return ret;
4394 }
4395 #endif
4396
4397 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4398 {
4399 struct blob_attr *cur;
4400 int ret = 0;
4401
4402 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4403 return -1;
4404
4405 #ifdef SIOCADD6RD
4406 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4407 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4408 unsigned int mask;
4409 struct ip_tunnel_6rd p6;
4410
4411 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4412 blobmsg_data(cur), blobmsg_len(cur));
4413
4414 memset(&p6, 0, sizeof(p6));
4415
4416 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4417 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4418 &p6.prefix, &mask) || mask > 128) {
4419 ret = -EINVAL;
4420 goto failure;
4421 }
4422
4423 p6.prefixlen = mask;
4424 }
4425
4426 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4427 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4428 &p6.relay_prefix, &mask) || mask > 32) {
4429 ret = -EINVAL;
4430 goto failure;
4431 }
4432
4433 p6.relay_prefixlen = mask;
4434 }
4435
4436 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4437 ret = -1;
4438 goto failure;
4439 }
4440 }
4441 #endif
4442
4443 return ret;
4444
4445 failure:
4446 system_link_del(name);
4447 return ret;
4448 }
4449
4450 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4451 {
4452 struct blob_attr *cur;
4453 bool set_df = true;
4454 struct ip_tunnel_parm p = {
4455 .link = link,
4456 .iph = {
4457 .version = 4,
4458 .ihl = 5,
4459 .protocol = proto,
4460 }
4461 };
4462
4463 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4464 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4465 return -EINVAL;
4466
4467 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4468 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4469 return -EINVAL;
4470
4471 if ((cur = tb[TUNNEL_ATTR_DF]))
4472 set_df = blobmsg_get_bool(cur);
4473
4474 if ((cur = tb[TUNNEL_ATTR_TTL]))
4475 p.iph.ttl = blobmsg_get_u32(cur);
4476
4477 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4478 char *str = blobmsg_get_string(cur);
4479 if (strcmp(str, "inherit")) {
4480 unsigned uval;
4481
4482 if (!system_tos_aton(str, &uval))
4483 return -EINVAL;
4484
4485 p.iph.tos = uval;
4486 } else
4487 p.iph.tos = 1;
4488 }
4489
4490 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4491 /* ttl !=0 and nopmtudisc are incompatible */
4492 if (p.iph.ttl && p.iph.frag_off == 0)
4493 return -EINVAL;
4494
4495 strncpy(p.name, name, sizeof(p.name) - 1);
4496
4497 switch (p.iph.protocol) {
4498 case IPPROTO_IPIP:
4499 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4500 case IPPROTO_IPV6:
4501 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4502 default:
4503 break;
4504 }
4505 return -1;
4506 }
4507
4508 int system_del_ip_tunnel(const struct device *dev)
4509 {
4510 return system_link_del(dev->ifname);
4511 }
4512
4513 int system_update_ipv6_mtu(struct device *dev, int mtu)
4514 {
4515 int ret = -1;
4516 char buf[64];
4517 int fd;
4518
4519 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4520 if (fd < 0)
4521 return ret;
4522
4523 if (!mtu) {
4524 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4525 if (len < 0)
4526 goto out;
4527
4528 buf[len] = 0;
4529 ret = atoi(buf);
4530 } else {
4531 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4532 ret = mtu;
4533 }
4534
4535 out:
4536 close(fd);
4537 return ret;
4538 }
4539
4540 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4541 {
4542 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4543 struct blob_attr *cur;
4544 const char *str;
4545
4546 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4547 blob_data(attr), blob_len(attr));
4548
4549 system_link_del(dev->ifname);
4550
4551 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4552 return -EINVAL;
4553 str = blobmsg_data(cur);
4554
4555 unsigned int ttl = 0;
4556 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4557 ttl = blobmsg_get_u32(cur);
4558 if (ttl > 255)
4559 return -EINVAL;
4560 }
4561
4562 unsigned int link = 0;
4563 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4564 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4565 if (!iface)
4566 return -EINVAL;
4567
4568 if (iface->l3_dev.dev)
4569 link = iface->l3_dev.dev->ifindex;
4570 }
4571
4572 if (!strcmp(str, "sit"))
4573 return system_add_sit_tunnel(dev->ifname, link, tb);
4574 #ifdef IFLA_IPTUN_MAX
4575 else if (!strcmp(str, "ipip6")) {
4576 return system_add_ip6_tunnel(dev->ifname, link, tb);
4577 } else if (!strcmp(str, "greip")) {
4578 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4579 } else if (!strcmp(str, "gretapip")) {
4580 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4581 } else if (!strcmp(str, "greip6")) {
4582 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4583 } else if (!strcmp(str, "gretapip6")) {
4584 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4585 #ifdef IFLA_VTI_MAX
4586 } else if (!strcmp(str, "vtiip")) {
4587 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4588 } else if (!strcmp(str, "vtiip6")) {
4589 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4590 #endif
4591 #ifdef IFLA_XFRM_MAX
4592 } else if (!strcmp(str, "xfrm")) {
4593 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4594 #endif
4595 #ifdef IFLA_VXLAN_MAX
4596 } else if(!strcmp(str, "vxlan")) {
4597 return system_add_vxlan(dev->ifname, link, tb, false);
4598 } else if(!strcmp(str, "vxlan6")) {
4599 return system_add_vxlan(dev->ifname, link, tb, true);
4600 #endif
4601 #endif
4602 } else if (!strcmp(str, "ipip")) {
4603 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4604 }
4605 else
4606 return -EINVAL;
4607
4608 return 0;
4609 }
OpenWrt Network interface configuration daemon