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


96cc99397100b2c7a2412f23e112c38203e912c4
[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 if (dev->external)
704 device_set_disabled(dev, !(flags & IFF_UP));
705
706 device_set_present(dev, ifindex > 0);
707 }
708 device_set_link(dev, flags & IFF_LOWER_UP ? true : false);
709 }
710
711 /* Evaluate netlink messages */
712 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
713 {
714 struct nlmsghdr *nh = nlmsg_hdr(msg);
715 struct ifinfomsg *ifi = NLMSG_DATA(nh);
716 struct nlattr *nla[__IFLA_MAX];
717 struct device *dev;
718
719 if (nh->nlmsg_type != RTM_NEWLINK)
720 return 0;
721
722 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
723 if (!nla[IFLA_IFNAME])
724 return 0;
725
726 dev = device_find(nla_data(nla[IFLA_IFNAME]));
727 if (!dev)
728 return 0;
729
730 system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index);
731 return 0;
732 }
733
734 static void
735 handle_hotplug_msg(char *data, int size)
736 {
737 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
738 char *cur, *end, *sep;
739 int skip;
740 bool add;
741
742 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
743 add = true;
744 else if (!strncmp(data, "remove@", 7))
745 add = false;
746 else
747 return;
748
749 skip = strlen(data) + 1;
750 end = data + size;
751
752 for (cur = data + skip; cur < end; cur += skip) {
753 skip = strlen(cur) + 1;
754
755 sep = strchr(cur, '=');
756 if (!sep)
757 continue;
758
759 *sep = 0;
760 if (!strcmp(cur, "INTERFACE"))
761 interface = sep + 1;
762 else if (!strcmp(cur, "SUBSYSTEM")) {
763 subsystem = sep + 1;
764 if (strcmp(subsystem, "net") != 0)
765 return;
766 } else if (!strcmp(cur, "DEVPATH_OLD")) {
767 interface_old = strrchr(sep + 1, '/');
768 if (interface_old)
769 interface_old++;
770 }
771 }
772
773 if (!subsystem || !interface)
774 return;
775
776 if (interface_old)
777 device_hotplug_event(interface_old, false);
778
779 device_hotplug_event(interface, add);
780 }
781
782 static void
783 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
784 {
785 struct event_socket *ev = container_of(u, struct event_socket, uloop);
786 struct sockaddr_nl nla;
787 unsigned char *buf = NULL;
788 int size;
789 int err;
790 socklen_t errlen = sizeof(err);
791
792 if (!u->error) {
793 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
794 if (nla.nl_pid == 0)
795 handle_hotplug_msg((char *) buf, size);
796
797 free(buf);
798 }
799 return;
800 }
801
802 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
803 goto abort;
804
805 switch(err) {
806 case ENOBUFS:
807 /* Increase rx buffer size on netlink socket */
808 ev->bufsize *= 2;
809 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
810 goto abort;
811 break;
812
813 default:
814 goto abort;
815 }
816 u->error = false;
817 return;
818
819 abort:
820 uloop_fd_delete(&ev->uloop);
821 return;
822 }
823
824 static int system_rtnl_call(struct nl_msg *msg)
825 {
826 int ret;
827
828 ret = nl_send_auto_complete(sock_rtnl, msg);
829 nlmsg_free(msg);
830
831 if (ret < 0)
832 return ret;
833
834 return nl_wait_for_ack(sock_rtnl);
835 }
836
837 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
838 {
839 struct nl_msg *msg;
840 struct ifinfomsg iim = {
841 .ifi_family = af,
842 .ifi_index = index,
843 };
844
845 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
846 if (!msg)
847 return NULL;
848
849 nlmsg_append(msg, &iim, sizeof(iim), 0);
850 if (ifname)
851 nla_put_string(msg, IFLA_IFNAME, ifname);
852
853 return msg;
854 }
855
856 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
857 {
858 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
859 }
860
861 static int system_link_del(const char *ifname)
862 {
863 struct nl_msg *msg;
864
865 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
866 if (!msg)
867 return -1;
868
869 return system_rtnl_call(msg);
870 }
871
872 int system_bridge_delbr(struct device *bridge)
873 {
874 return system_link_del(bridge->ifname);
875 }
876
877 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
878 {
879 struct ifreq ifr;
880
881 memset(&ifr, 0, sizeof(ifr));
882 if (dev)
883 ifr.ifr_ifindex = dev->ifindex;
884 else
885 ifr.ifr_data = data;
886 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
887 return ioctl(sock_ioctl, cmd, &ifr);
888 }
889
890 static bool system_is_bridge(const char *name)
891 {
892 struct stat st;
893
894 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
895 }
896
897 static char *system_get_bridge(const char *name, char *buf, int buflen)
898 {
899 char *path;
900 ssize_t len = -1;
901 glob_t gl;
902
903 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
904 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
905 return NULL;
906
907 if (gl.gl_pathc > 0)
908 len = readlink(gl.gl_pathv[0], buf, buflen);
909
910 globfree(&gl);
911
912 if (len < 0)
913 return NULL;
914
915 buf[len] = 0;
916 path = strrchr(buf, '/');
917 if (!path)
918 return NULL;
919
920 return path + 1;
921 }
922
923 static void
924 system_bridge_set_wireless(struct device *bridge, struct device *dev)
925 {
926 bool mcast_to_ucast = dev->wireless_ap;
927 bool hairpin;
928
929 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
930 mcast_to_ucast = dev->settings.multicast_to_unicast;
931 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
932 !bridge->settings.multicast_to_unicast)
933 mcast_to_ucast = false;
934
935 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
936 if (dev->wireless_isolate)
937 hairpin = false;
938
939 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
940 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
941 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
942 }
943
944 int system_bridge_addif(struct device *bridge, struct device *dev)
945 {
946 char buf[64];
947 char *oldbr;
948 int tries = 0;
949 int ret;
950
951
952 for (tries = 0; tries < 3; tries++) {
953 ret = 0;
954 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
955 if (oldbr && !strcmp(oldbr, bridge->ifname))
956 break;
957
958 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
959 if (!ret)
960 break;
961
962 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
963 dev->ifname, bridge->ifname, tries, strerror(errno));
964 }
965
966 if (dev->wireless)
967 system_bridge_set_wireless(bridge, dev);
968
969 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
970 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
971 system_bridge_set_multicast_router(dev, buf);
972 }
973
974 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
975 dev->settings.multicast_fast_leave)
976 system_bridge_set_multicast_fast_leave(dev, "1");
977
978 if (dev->settings.flags & DEV_OPT_LEARNING &&
979 !dev->settings.learning)
980 system_bridge_set_learning(dev, "0");
981
982 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
983 !dev->settings.unicast_flood)
984 system_bridge_set_unicast_flood(dev, "0");
985
986 if (dev->settings.flags & DEV_OPT_ISOLATE &&
987 dev->settings.isolate)
988 system_bridge_set_isolated(dev, "1");
989
990 if (dev->bpdu_filter)
991 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
992
993 return ret;
994 }
995
996 int system_bridge_delif(struct device *bridge, struct device *dev)
997 {
998 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
999 }
1000
1001 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
1002 {
1003 struct bridge_vlan_info vinfo = { .vid = vid, };
1004 unsigned short flags = 0;
1005 struct nlattr *afspec;
1006 struct nl_msg *nlm;
1007 int index;
1008 int ret = 0;
1009
1010 index = if_nametoindex(iface);
1011 if (!index)
1012 return -1;
1013
1014 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1015 if (!nlm)
1016 return -1;
1017
1018 if (vflags & BRVLAN_F_SELF)
1019 flags |= BRIDGE_FLAGS_SELF;
1020
1021 if (vflags & BRVLAN_F_PVID)
1022 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1023
1024 if (vflags & BRVLAN_F_UNTAGGED)
1025 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1026
1027 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1028 if (!afspec) {
1029 ret = -ENOMEM;
1030 goto failure;
1031 }
1032
1033 if (flags)
1034 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1035
1036 if (vid_end > vid)
1037 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1038
1039 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1040
1041 if (vid_end > vid) {
1042 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1043 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1044 vinfo.vid = vid_end;
1045 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1046 }
1047
1048 nla_nest_end(nlm, afspec);
1049
1050 return system_rtnl_call(nlm);
1051
1052 failure:
1053 nlmsg_free(nlm);
1054 return ret;
1055 }
1056
1057 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1058 {
1059 const char *ifname = dev->ifname;
1060 struct blob_attr *cur;
1061 char op = cfg ? '+' : '-';
1062 char buf[64];
1063 size_t rem;
1064
1065 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1066 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1067 write_file(dev_buf, buf);
1068
1069 if (!cfg)
1070 return 0;
1071
1072 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1073
1074 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1075
1076 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1077 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1078 cfg->policy == BONDING_MODE_8023AD)
1079 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1080
1081 if (cfg->policy == BONDING_MODE_8023AD) {
1082 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1083 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1084 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1085 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1086 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1087 }
1088
1089 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1090 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1091
1092 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1093 cfg->policy == BONDING_MODE_BALANCE_ALB)
1094 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1095
1096 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1097 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1098 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1099 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1100 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1101 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1102
1103 system_set_dev_sysfs_int((cfg->monitor_arp ?
1104 "bonding/arp_interval" :
1105 "bonding/miimon"), ifname, cfg->monitor_interval);
1106
1107 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1108 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1109 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1110 }
1111
1112 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1113 if (cfg->policy < BONDING_MODE_8023AD)
1114 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1115 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1116 if (!cfg->monitor_arp && cfg->monitor_interval) {
1117 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1118 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1119 }
1120
1121 return 0;
1122 }
1123
1124 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1125 {
1126 const char *port_name = port->ifname;
1127 const char op_ch = add ? '+' : '-';
1128 char buf[IFNAMSIZ + 1];
1129
1130 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1131 system_if_down(port);
1132 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1133 system_if_up(port);
1134
1135 if (primary)
1136 system_set_dev_sysfs("bonding/primary", dev->ifname,
1137 add ? port_name : "");
1138
1139 return 0;
1140 }
1141
1142 int system_if_resolve(struct device *dev)
1143 {
1144 struct ifreq ifr;
1145
1146 memset(&ifr, 0, sizeof(ifr));
1147 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1148 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1149 return ifr.ifr_ifindex;
1150 else
1151 return 0;
1152 }
1153
1154 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1155 {
1156 struct ifreq ifr;
1157
1158 memset(&ifr, 0, sizeof(ifr));
1159 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1160 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1161 return -1;
1162
1163 ifr.ifr_flags |= add;
1164 ifr.ifr_flags &= ~rem;
1165 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1166 }
1167
1168 struct clear_data {
1169 struct nl_msg *msg;
1170 struct device *dev;
1171 int type;
1172 int size;
1173 int af;
1174 };
1175
1176
1177 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1178 {
1179 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1180
1181 return (long)ifa->ifa_index == ifindex;
1182 }
1183
1184 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1185 {
1186 struct rtmsg *r = NLMSG_DATA(hdr);
1187 struct nlattr *tb[__RTA_MAX];
1188
1189 if (r->rtm_protocol == RTPROT_KERNEL &&
1190 r->rtm_family == AF_INET6)
1191 return false;
1192
1193 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1194 if (!tb[RTA_OIF])
1195 return false;
1196
1197 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1198 }
1199
1200 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1201 {
1202 return true;
1203 }
1204
1205 static int cb_clear_event(struct nl_msg *msg, void *arg)
1206 {
1207 struct clear_data *clr = arg;
1208 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1209 bool (*cb)(struct nlmsghdr *, int ifindex);
1210 int type, ret;
1211
1212 switch(clr->type) {
1213 case RTM_GETADDR:
1214 type = RTM_DELADDR;
1215 if (hdr->nlmsg_type != RTM_NEWADDR)
1216 return NL_SKIP;
1217
1218 cb = check_ifaddr;
1219 break;
1220 case RTM_GETROUTE:
1221 type = RTM_DELROUTE;
1222 if (hdr->nlmsg_type != RTM_NEWROUTE)
1223 return NL_SKIP;
1224
1225 cb = check_route;
1226 break;
1227 case RTM_GETRULE:
1228 type = RTM_DELRULE;
1229 if (hdr->nlmsg_type != RTM_NEWRULE)
1230 return NL_SKIP;
1231
1232 cb = check_rule;
1233 break;
1234 default:
1235 return NL_SKIP;
1236 }
1237
1238 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1239 return NL_SKIP;
1240
1241 if (type == RTM_DELRULE)
1242 D(SYSTEM, "Remove a rule\n");
1243 else
1244 D(SYSTEM, "Remove %s from device %s\n",
1245 type == RTM_DELADDR ? "an address" : "a route",
1246 clr->dev->ifname);
1247
1248 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1249 hdr = nlmsg_hdr(clr->msg);
1250 hdr->nlmsg_type = type;
1251 hdr->nlmsg_flags = NLM_F_REQUEST;
1252
1253 nl_socket_disable_auto_ack(sock_rtnl);
1254 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1255 if (ret < 0) {
1256 if (type == RTM_DELRULE)
1257 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1258 else
1259 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1260 type == RTM_DELADDR ? "an address" : "a route",
1261 clr->dev->ifname, ret);
1262 }
1263
1264 nl_socket_enable_auto_ack(sock_rtnl);
1265
1266 return NL_SKIP;
1267 }
1268
1269 static int
1270 cb_finish_event(struct nl_msg *msg, void *arg)
1271 {
1272 int *pending = arg;
1273 *pending = 0;
1274 return NL_STOP;
1275 }
1276
1277 static int
1278 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1279 {
1280 int *pending = arg;
1281 *pending = err->error;
1282 return NL_STOP;
1283 }
1284
1285 static void
1286 system_if_clear_entries(struct device *dev, int type, int af)
1287 {
1288 struct clear_data clr;
1289 struct nl_cb *cb;
1290 struct rtmsg rtm = {
1291 .rtm_family = af,
1292 .rtm_flags = RTM_F_CLONED,
1293 };
1294 int flags = NLM_F_DUMP;
1295 int pending = 1;
1296
1297 clr.af = af;
1298 clr.dev = dev;
1299 clr.type = type;
1300 switch (type) {
1301 case RTM_GETADDR:
1302 case RTM_GETRULE:
1303 clr.size = sizeof(struct rtgenmsg);
1304 break;
1305 case RTM_GETROUTE:
1306 clr.size = sizeof(struct rtmsg);
1307 break;
1308 default:
1309 return;
1310 }
1311
1312 cb = nl_cb_alloc(NL_CB_DEFAULT);
1313 if (!cb)
1314 return;
1315
1316 clr.msg = nlmsg_alloc_simple(type, flags);
1317 if (!clr.msg)
1318 goto out;
1319
1320 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1321 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1322 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1323 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1324
1325 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1326 goto free;
1327
1328 while (pending > 0)
1329 nl_recvmsgs(sock_rtnl, cb);
1330
1331 free:
1332 nlmsg_free(clr.msg);
1333 out:
1334 nl_cb_put(cb);
1335 }
1336
1337 /*
1338 * Clear bridge (membership) state and bring down device
1339 */
1340 void system_if_clear_state(struct device *dev)
1341 {
1342 static char buf[256];
1343 char *bridge;
1344 device_set_ifindex(dev, system_if_resolve(dev));
1345
1346 if (dev->external || !dev->ifindex)
1347 return;
1348
1349 system_if_flags(dev->ifname, 0, IFF_UP);
1350
1351 if (system_is_bridge(dev->ifname)) {
1352 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1353 system_bridge_delbr(dev);
1354 return;
1355 }
1356
1357 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1358 if (bridge) {
1359 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1360 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1361 }
1362
1363 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1364 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1365 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1366 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1367 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1368 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1369 system_set_disable_ipv6(dev, "0");
1370 }
1371
1372 static inline unsigned long
1373 sec_to_jiffies(int val)
1374 {
1375 return (unsigned long) val * 100;
1376 }
1377
1378 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1379 {
1380 struct nlattr *linkinfo, *data;
1381 struct nl_msg *msg;
1382 uint64_t val;
1383 int rv;
1384
1385 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1386 if (!msg)
1387 return -1;
1388
1389 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1390 goto nla_put_failure;
1391
1392 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1393
1394 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1395 goto nla_put_failure;
1396
1397 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1398 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1399 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1400 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1401 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1402
1403 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1404 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1405
1406 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1407 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1408 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1409 }
1410
1411 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1412 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1413
1414 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1415 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1416
1417 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1418 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1419
1420 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1421 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1422 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1423 val = cfg->robustness * cfg->query_interval +
1424 cfg->query_response_interval;
1425
1426 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1427
1428 val -= cfg->query_response_interval / 2;
1429
1430 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1431 }
1432
1433 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1434 val = cfg->query_interval / 4;
1435
1436 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1437 }
1438
1439 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1440 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1441 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1442 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1443
1444 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1445 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1446
1447 nla_nest_end(msg, data);
1448 nla_nest_end(msg, linkinfo);
1449
1450 rv = system_rtnl_call(msg);
1451 if (rv)
1452 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1453
1454 return rv;
1455
1456 nla_put_failure:
1457 nlmsg_free(msg);
1458 return -ENOMEM;
1459 }
1460
1461 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1462 {
1463 struct nl_msg *msg;
1464 struct nlattr *linkinfo, *data;
1465 size_t i;
1466 int rv;
1467 static const struct {
1468 const char *name;
1469 enum macvlan_mode val;
1470 } modes[] = {
1471 { "private", MACVLAN_MODE_PRIVATE },
1472 { "vepa", MACVLAN_MODE_VEPA },
1473 { "bridge", MACVLAN_MODE_BRIDGE },
1474 { "passthru", MACVLAN_MODE_PASSTHRU },
1475 };
1476
1477 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1478 if (!msg)
1479 return -1;
1480
1481 if (cfg->flags & MACVLAN_OPT_MACADDR)
1482 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1483 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1484
1485 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1486 goto nla_put_failure;
1487
1488 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1489
1490 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1491 goto nla_put_failure;
1492
1493 if (cfg->mode) {
1494 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1495 if (strcmp(cfg->mode, modes[i].name) != 0)
1496 continue;
1497
1498 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1499 break;
1500 }
1501 }
1502
1503 nla_nest_end(msg, data);
1504 nla_nest_end(msg, linkinfo);
1505
1506 rv = system_rtnl_call(msg);
1507 if (rv)
1508 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1509
1510 return rv;
1511
1512 nla_put_failure:
1513 nlmsg_free(msg);
1514 return -ENOMEM;
1515 }
1516
1517 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1518 {
1519 struct nl_msg *msg;
1520 int index;
1521
1522 if (!dev)
1523 return -1;
1524
1525 index = system_if_resolve(dev);
1526 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1527 if (!msg)
1528 return -1;
1529
1530 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1531 return system_rtnl_call(msg);
1532 }
1533
1534 int system_macvlan_del(struct device *macvlan)
1535 {
1536 return system_link_del(macvlan->ifname);
1537 }
1538
1539 int system_netns_open(const pid_t target_ns)
1540 {
1541 char pid_net_path[PATH_MAX];
1542
1543 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1544
1545 return open(pid_net_path, O_RDONLY);
1546 }
1547
1548 int system_netns_set(int netns_fd)
1549 {
1550 return setns(netns_fd, CLONE_NEWNET);
1551 }
1552
1553 int system_veth_add(struct device *veth, struct veth_config *cfg)
1554 {
1555 struct nl_msg *msg;
1556 struct ifinfomsg empty_iim = {0,};
1557 struct nlattr *linkinfo, *data, *veth_info;
1558 int rv;
1559
1560 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1561
1562 if (!msg)
1563 return -1;
1564
1565 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1566
1567 if (cfg->flags & VETH_OPT_MACADDR)
1568 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1569 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1570
1571 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1572 goto nla_put_failure;
1573
1574 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1575
1576 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1577 goto nla_put_failure;
1578
1579 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1580 goto nla_put_failure;
1581
1582 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1583
1584 if (cfg->flags & VETH_OPT_PEER_NAME)
1585 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1586 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1587 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1588
1589 nla_nest_end(msg, veth_info);
1590 nla_nest_end(msg, data);
1591 nla_nest_end(msg, linkinfo);
1592
1593 rv = system_rtnl_call(msg);
1594 if (rv) {
1595 if (cfg->flags & VETH_OPT_PEER_NAME)
1596 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1597 else
1598 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1599 }
1600
1601 return rv;
1602
1603 nla_put_failure:
1604 nlmsg_free(msg);
1605 return -ENOMEM;
1606 }
1607
1608 int system_veth_del(struct device *veth)
1609 {
1610 return system_link_del(veth->ifname);
1611 }
1612
1613 static int system_vlan(struct device *dev, int id)
1614 {
1615 struct vlan_ioctl_args ifr = {
1616 .cmd = SET_VLAN_NAME_TYPE_CMD,
1617 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1618 };
1619
1620 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1621 return -1;
1622
1623 if (id < 0) {
1624 ifr.cmd = DEL_VLAN_CMD;
1625 ifr.u.VID = 0;
1626 } else {
1627 ifr.cmd = ADD_VLAN_CMD;
1628 ifr.u.VID = id;
1629 }
1630 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1631 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1632 }
1633
1634 int system_vlan_add(struct device *dev, int id)
1635 {
1636 return system_vlan(dev, id);
1637 }
1638
1639 int system_vlan_del(struct device *dev)
1640 {
1641 return system_vlan(dev, -1);
1642 }
1643
1644 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1645 {
1646 struct nl_msg *msg;
1647 struct nlattr *linkinfo, *data, *qos;
1648 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1649 struct vlan_qos_mapping *elem;
1650 struct ifla_vlan_qos_mapping nl_qos_map;
1651 int rv;
1652
1653 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1654
1655 if (!msg)
1656 return -1;
1657
1658 nlmsg_append(msg, &iim, sizeof(iim), 0);
1659 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1660 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1661
1662 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1663 goto nla_put_failure;
1664
1665 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1666
1667 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1668 goto nla_put_failure;
1669
1670 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1671
1672 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1673 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1674 #else
1675 if(cfg->proto == VLAN_PROTO_8021AD)
1676 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);
1677 #endif
1678
1679 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1680 goto nla_put_failure;
1681
1682 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1683 nl_qos_map.from = elem->from;
1684 nl_qos_map.to = elem->to;
1685 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1686 }
1687 nla_nest_end(msg, qos);
1688
1689 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1690 goto nla_put_failure;
1691
1692 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1693 nl_qos_map.from = elem->from;
1694 nl_qos_map.to = elem->to;
1695 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1696 }
1697 nla_nest_end(msg, qos);
1698
1699 nla_nest_end(msg, data);
1700 nla_nest_end(msg, linkinfo);
1701
1702 rv = system_rtnl_call(msg);
1703 if (rv)
1704 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1705
1706 return rv;
1707
1708 nla_put_failure:
1709 nlmsg_free(msg);
1710 return -ENOMEM;
1711 }
1712
1713 int system_vlandev_del(struct device *vlandev)
1714 {
1715 return system_link_del(vlandev->ifname);
1716 }
1717
1718 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
1719 struct if_get_master_data {
1720 int ifindex;
1721 int master_ifindex;
1722 int pending;
1723 };
1724
1725 static void if_get_master_dsa_linkinfo_attr(struct if_get_master_data *data,
1726 struct rtattr *attr)
1727 {
1728 struct rtattr *cur;
1729 int rem = RTA_PAYLOAD(attr);
1730
1731 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1732 if (cur->rta_type != IFLA_DSA_MASTER)
1733 continue;
1734
1735 data->master_ifindex = *(__u32 *)RTA_DATA(cur);
1736 }
1737 }
1738
1739 static void if_get_master_linkinfo_attr(struct if_get_master_data *data,
1740 struct rtattr *attr)
1741 {
1742 struct rtattr *cur;
1743 int rem = RTA_PAYLOAD(attr);
1744
1745 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1746 if (cur->rta_type != IFLA_INFO_KIND && cur->rta_type != IFLA_INFO_DATA)
1747 continue;
1748
1749 if (cur->rta_type == IFLA_INFO_KIND && strcmp("dsa", (char *)RTA_DATA(cur)))
1750 break;
1751
1752 if (cur->rta_type == IFLA_INFO_DATA)
1753 if_get_master_dsa_linkinfo_attr(data, cur);
1754 }
1755 }
1756
1757 static int cb_if_get_master_valid(struct nl_msg *msg, void *arg)
1758 {
1759 struct nlmsghdr *nh = nlmsg_hdr(msg);
1760 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1761 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1762 struct rtattr *attr;
1763 int rem;
1764
1765 if (nh->nlmsg_type != RTM_NEWLINK)
1766 return NL_SKIP;
1767
1768 if (ifi->ifi_family != AF_UNSPEC)
1769 return NL_SKIP;
1770
1771 if (ifi->ifi_index != data->ifindex)
1772 return NL_SKIP;
1773
1774 attr = IFLA_RTA(ifi);
1775 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1776
1777 while (RTA_OK(attr, rem)) {
1778 if (attr->rta_type == IFLA_LINKINFO)
1779 if_get_master_linkinfo_attr(data, attr);
1780
1781 attr = RTA_NEXT(attr, rem);
1782 }
1783
1784 return NL_OK;
1785 }
1786
1787 static int cb_if_get_master_ack(struct nl_msg *msg, void *arg)
1788 {
1789 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1790 data->pending = 0;
1791 return NL_STOP;
1792 }
1793
1794 static int cb_if_get_master_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1795 {
1796 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1797 data->pending = 0;
1798 return NL_STOP;
1799 }
1800
1801 static int system_if_get_master_ifindex(struct device *dev)
1802 {
1803 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1804 struct nl_msg *msg;
1805 struct ifinfomsg ifi = {
1806 .ifi_family = AF_UNSPEC,
1807 .ifi_index = 0,
1808 };
1809 struct if_get_master_data data = {
1810 .ifindex = if_nametoindex(dev->ifname),
1811 .master_ifindex = -1,
1812 .pending = 1,
1813 };
1814 int ret = -1;
1815
1816 if (!cb)
1817 return ret;
1818
1819 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
1820 if (!msg)
1821 goto out;
1822
1823 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1824 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1825 goto free;
1826
1827 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_get_master_valid, &data);
1828 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_get_master_ack, &data);
1829 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_get_master_error, &data);
1830
1831 ret = nl_send_auto_complete(sock_rtnl, msg);
1832 if (ret < 0)
1833 goto free;
1834
1835 while (data.pending > 0)
1836 nl_recvmsgs(sock_rtnl, cb);
1837
1838 if (data.master_ifindex >= 0)
1839 ret = data.master_ifindex;
1840
1841 free:
1842 nlmsg_free(msg);
1843 out:
1844 nl_cb_put(cb);
1845 return ret;
1846 }
1847
1848 static void system_refresh_orig_macaddr(struct device *dev, struct device_settings *s)
1849 {
1850 struct ifreq ifr;
1851
1852 memset(&ifr, 0, sizeof(ifr));
1853 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1854
1855 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0)
1856 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1857 }
1858
1859 static void system_set_master(struct device *dev, int master_ifindex)
1860 {
1861 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
1862 struct nl_msg *nlm;
1863
1864 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1865 if (!nlm)
1866 return;
1867
1868 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
1869 nla_put_string(nlm, IFLA_IFNAME, dev->ifname);
1870
1871 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
1872 if (!linkinfo)
1873 goto failure;
1874
1875 nla_put_string(nlm, IFLA_INFO_KIND, "dsa");
1876 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
1877 if (!infodata)
1878 goto failure;
1879
1880 nla_put_u32(nlm, IFLA_DSA_MASTER, master_ifindex);
1881
1882 nla_nest_end(nlm, infodata);
1883 nla_nest_end(nlm, linkinfo);
1884
1885 system_rtnl_call(nlm);
1886
1887 return;
1888
1889 failure:
1890 nlmsg_free(nlm);
1891 }
1892 #endif
1893
1894 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1895 {
1896 if (nr < 0)
1897 return;
1898
1899 if (nr >= (nwords * 32))
1900 return;
1901
1902 mask[nr / 32] &= ~(1U << (nr % 32));
1903 }
1904
1905 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1906 {
1907 if (nr < 0)
1908 return false;
1909
1910 if (nr >= (nwords * 32))
1911 return false;
1912
1913 return !!(mask[nr / 32] & (1U << (nr % 32)));
1914 }
1915
1916 static int
1917 system_get_ethtool_gro(struct device *dev)
1918 {
1919 struct ethtool_value ecmd;
1920 struct ifreq ifr = {
1921 .ifr_data = (caddr_t)&ecmd,
1922 };
1923
1924 memset(&ecmd, 0, sizeof(ecmd));
1925 ecmd.cmd = ETHTOOL_GGRO;
1926 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1927
1928 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1929 return -1;
1930
1931 return ecmd.data;
1932 }
1933
1934 static void
1935 system_set_ethtool_gro(struct device *dev, struct device_settings *s)
1936 {
1937 struct ethtool_value ecmd;
1938 struct ifreq ifr = {
1939 .ifr_data = (caddr_t)&ecmd,
1940 };
1941
1942 memset(&ecmd, 0, sizeof(ecmd));
1943 ecmd.cmd = ETHTOOL_SGRO;
1944 ecmd.data = s->gro;
1945 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1946
1947 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1948 }
1949
1950 static void
1951 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1952 {
1953 struct ethtool_pauseparam pp;
1954 struct ifreq ifr = {
1955 .ifr_data = (caddr_t)&pp,
1956 };
1957
1958 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1959 memset(&pp, 0, sizeof(pp));
1960 pp.cmd = ETHTOOL_GPAUSEPARAM;
1961 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1962 return;
1963
1964 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1965 pp.autoneg = AUTONEG_DISABLE;
1966
1967 if (s->flags & DEV_OPT_PAUSE) {
1968 if (s->flags & DEV_OPT_RXPAUSE)
1969 pp.rx_pause = s->rxpause && s->pause;
1970 else
1971 pp.rx_pause = s->pause;
1972
1973 if (s->flags & DEV_OPT_TXPAUSE)
1974 pp.tx_pause = s->txpause && s->pause;
1975 else
1976 pp.tx_pause = s->pause;
1977 } else {
1978 if (s->flags & DEV_OPT_RXPAUSE)
1979 pp.rx_pause = s->rxpause;
1980
1981 if (s->flags & DEV_OPT_TXPAUSE)
1982 pp.tx_pause = s->txpause;
1983 }
1984
1985 if (s->flags & DEV_OPT_ASYM_PAUSE &&
1986 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
1987 pp.rx_pause = pp.tx_pause = false;
1988 } else {
1989 pp.autoneg = AUTONEG_ENABLE;
1990 /* Pause and Asym_Pause advertising bits will be set via
1991 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
1992 */
1993 }
1994
1995 pp.cmd = ETHTOOL_SPAUSEPARAM;
1996 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1997 }
1998
1999 static void
2000 system_set_ethtool_eee_settings(struct device *dev, struct device_settings *s)
2001 {
2002 struct ethtool_eee eeecmd;
2003 struct ifreq ifr = {
2004 .ifr_data = (caddr_t)&eeecmd,
2005 };
2006
2007 memset(&eeecmd, 0, sizeof(eeecmd));
2008 eeecmd.cmd = ETHTOOL_SEEE;
2009 eeecmd.eee_enabled = s->eee;
2010 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2011
2012 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2013 netifd_log_message(L_WARNING, "cannot set eee %d for device %s", s->eee, dev->ifname);
2014 }
2015
2016 static void
2017 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
2018 {
2019 struct {
2020 struct ethtool_link_settings req;
2021 __u32 link_mode_data[3 * 127];
2022 } ecmd;
2023 struct ifreq ifr = {
2024 .ifr_data = (caddr_t)&ecmd,
2025 };
2026 size_t i;
2027 __s8 nwords;
2028 __u32 *supported, *advertising;
2029
2030 system_set_ethtool_pause(dev, s);
2031
2032 if (s->flags & DEV_OPT_EEE)
2033 system_set_ethtool_eee_settings(dev, s);
2034
2035 memset(&ecmd, 0, sizeof(ecmd));
2036 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2037 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2038
2039 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2040 ecmd.req.link_mode_masks_nwords >= 0 ||
2041 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2042 return;
2043
2044 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2045
2046 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2047 ecmd.req.link_mode_masks_nwords <= 0 ||
2048 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2049 return;
2050
2051 nwords = ecmd.req.link_mode_masks_nwords;
2052 supported = &ecmd.link_mode_data[0];
2053 advertising = &ecmd.link_mode_data[nwords];
2054 memcpy(advertising, supported, sizeof(__u32) * nwords);
2055
2056 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2057 if (s->flags & DEV_OPT_DUPLEX) {
2058 if (s->duplex)
2059 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2060 else
2061 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2062 }
2063 if (!(s->flags & DEV_OPT_SPEED) ||
2064 s->speed == ethtool_modes[i].speed)
2065 continue;
2066
2067 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2068 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2069 }
2070
2071 if (s->flags & DEV_OPT_PAUSE)
2072 if (!s->pause)
2073 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
2074
2075 if (s->flags & DEV_OPT_ASYM_PAUSE)
2076 if (!s->asym_pause)
2077 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
2078
2079 if (s->flags & DEV_OPT_AUTONEG) {
2080 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
2081 if (!s->autoneg) {
2082 if (s->flags & DEV_OPT_SPEED)
2083 ecmd.req.speed = s->speed;
2084
2085 if (s->flags & DEV_OPT_DUPLEX)
2086 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
2087 }
2088 }
2089
2090 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
2091 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2092 }
2093
2094 static void
2095 system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s)
2096 {
2097 if (s->flags & DEV_OPT_GRO)
2098 system_set_ethtool_gro(dev, s);
2099 }
2100
2101 void
2102 system_if_get_settings(struct device *dev, struct device_settings *s)
2103 {
2104 struct ifreq ifr;
2105 char buf[10];
2106 int ret;
2107
2108 memset(&ifr, 0, sizeof(ifr));
2109 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2110
2111 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
2112 s->mtu = ifr.ifr_mtu;
2113 s->flags |= DEV_OPT_MTU;
2114 }
2115
2116 s->mtu6 = system_update_ipv6_mtu(dev, 0);
2117 if (s->mtu6 > 0)
2118 s->flags |= DEV_OPT_MTU6;
2119
2120 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
2121 s->txqueuelen = ifr.ifr_qlen;
2122 s->flags |= DEV_OPT_TXQUEUELEN;
2123 }
2124
2125 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
2126 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
2127 s->flags |= DEV_OPT_MACADDR;
2128 }
2129
2130 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
2131 s->ipv6 = !strtoul(buf, NULL, 0);
2132 s->flags |= DEV_OPT_IPV6;
2133 }
2134
2135 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
2136 s->ip6segmentrouting = strtoul(buf, NULL, 0);
2137 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
2138 }
2139
2140 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
2141 s->promisc = ifr.ifr_flags & IFF_PROMISC;
2142 s->flags |= DEV_OPT_PROMISC;
2143
2144 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
2145 s->flags |= DEV_OPT_MULTICAST;
2146 }
2147
2148 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
2149 s->rpfilter = strtoul(buf, NULL, 0);
2150 s->flags |= DEV_OPT_RPFILTER;
2151 }
2152
2153 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
2154 s->acceptlocal = strtoul(buf, NULL, 0);
2155 s->flags |= DEV_OPT_ACCEPTLOCAL;
2156 }
2157
2158 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
2159 s->igmpversion = strtoul(buf, NULL, 0);
2160 s->flags |= DEV_OPT_IGMPVERSION;
2161 }
2162
2163 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
2164 s->mldversion = strtoul(buf, NULL, 0);
2165 s->flags |= DEV_OPT_MLDVERSION;
2166 }
2167
2168 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
2169 s->neigh4reachabletime = strtoul(buf, NULL, 0);
2170 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2171 }
2172
2173 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
2174 s->neigh6reachabletime = strtoul(buf, NULL, 0);
2175 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2176 }
2177
2178 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
2179 s->neigh4locktime = strtol(buf, NULL, 0);
2180 s->flags |= DEV_OPT_NEIGHLOCKTIME;
2181 }
2182
2183 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
2184 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
2185 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2186 }
2187
2188 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
2189 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
2190 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2191 }
2192
2193 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
2194 s->dadtransmits = strtoul(buf, NULL, 0);
2195 s->flags |= DEV_OPT_DADTRANSMITS;
2196 }
2197
2198 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
2199 s->sendredirects = strtoul(buf, NULL, 0);
2200 s->flags |= DEV_OPT_SENDREDIRECTS;
2201 }
2202
2203 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2204 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2205 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
2206 }
2207
2208 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2209 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2210 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
2211 }
2212
2213 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
2214 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
2215 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
2216 }
2217
2218 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
2219 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
2220 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
2221 }
2222
2223 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
2224 s->arp_accept = strtoul(buf, NULL, 0);
2225 s->flags |= DEV_OPT_ARP_ACCEPT;
2226 }
2227
2228 ret = system_get_ethtool_gro(dev);
2229 if (ret >= 0) {
2230 s->gro = ret;
2231 s->flags |= DEV_OPT_GRO;
2232 }
2233
2234 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2235 ret = system_if_get_master_ifindex(dev);
2236 if (ret >= 0) {
2237 s->master_ifindex = ret;
2238 s->flags |= DEV_OPT_MASTER;
2239 }
2240 #endif
2241 }
2242
2243 void
2244 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
2245 {
2246 struct ifreq ifr;
2247 char buf[12];
2248
2249 apply_mask &= s->flags;
2250
2251 memset(&ifr, 0, sizeof(ifr));
2252 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2253 if (apply_mask & DEV_OPT_MTU) {
2254 ifr.ifr_mtu = s->mtu;
2255 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2256 s->flags &= ~DEV_OPT_MTU;
2257 }
2258 if (apply_mask & DEV_OPT_MTU6) {
2259 system_update_ipv6_mtu(dev, s->mtu6);
2260 }
2261 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2262 ifr.ifr_qlen = s->txqueuelen;
2263 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2264 s->flags &= ~DEV_OPT_TXQUEUELEN;
2265 }
2266 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2267 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2268 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2269 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2270 s->flags &= ~DEV_OPT_MACADDR;
2271 }
2272 if (apply_mask & DEV_OPT_IPV6)
2273 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2274 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2275 struct device dummy = {
2276 .ifname = "all",
2277 };
2278 bool ip6segmentrouting = device_check_ip6segmentrouting();
2279
2280 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2281 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2282 }
2283 if (apply_mask & DEV_OPT_PROMISC) {
2284 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2285 !s->promisc ? IFF_PROMISC : 0) < 0)
2286 s->flags &= ~DEV_OPT_PROMISC;
2287 }
2288 if (apply_mask & DEV_OPT_RPFILTER) {
2289 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2290 system_set_rpfilter(dev, buf);
2291 }
2292 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2293 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2294 if (apply_mask & DEV_OPT_IGMPVERSION) {
2295 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2296 system_set_igmpversion(dev, buf);
2297 }
2298 if (apply_mask & DEV_OPT_MLDVERSION) {
2299 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2300 system_set_mldversion(dev, buf);
2301 }
2302 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2303 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2304 system_set_neigh4reachabletime(dev, buf);
2305 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2306 system_set_neigh6reachabletime(dev, buf);
2307 }
2308 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2309 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2310 system_set_neigh4locktime(dev, buf);
2311 }
2312 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2313 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2314 system_set_neigh4gcstaletime(dev, buf);
2315 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2316 system_set_neigh6gcstaletime(dev, buf);
2317 }
2318 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2319 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2320 system_set_dadtransmits(dev, buf);
2321 }
2322 if (apply_mask & DEV_OPT_MULTICAST) {
2323 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2324 !s->multicast ? IFF_MULTICAST : 0) < 0)
2325 s->flags &= ~DEV_OPT_MULTICAST;
2326 }
2327 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2328 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2329 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2330 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2331 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2332 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2333 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2334 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2335 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2336 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2337 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2338 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2339 if (apply_mask & DEV_OPT_MASTER) {
2340 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2341 system_set_master(dev, s->master_ifindex);
2342 system_refresh_orig_macaddr(dev, &dev->orig_settings);
2343 #else
2344 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 6.1.0, changing DSA port conduit is not supported!", dev->ifname);
2345 #endif
2346 }
2347 system_set_ethtool_settings(dev, s);
2348 }
2349
2350 void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s)
2351 {
2352 system_set_ethtool_settings_after_up(dev, s);
2353 }
2354
2355 int system_if_up(struct device *dev)
2356 {
2357 return system_if_flags(dev->ifname, IFF_UP, 0);
2358 }
2359
2360 int system_if_down(struct device *dev)
2361 {
2362 return system_if_flags(dev->ifname, 0, IFF_UP);
2363 }
2364
2365 struct if_check_data {
2366 struct device *dev;
2367 int pending;
2368 int ret;
2369 };
2370
2371 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2372 {
2373 struct nlmsghdr *nh = nlmsg_hdr(msg);
2374 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2375 struct if_check_data *chk = (struct if_check_data *)arg;
2376
2377 if (nh->nlmsg_type != RTM_NEWLINK)
2378 return NL_SKIP;
2379
2380 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2381 return NL_OK;
2382 }
2383
2384 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2385 {
2386 struct if_check_data *chk = (struct if_check_data *)arg;
2387 chk->pending = 0;
2388 return NL_STOP;
2389 }
2390
2391 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2392 {
2393 struct if_check_data *chk = (struct if_check_data *)arg;
2394
2395 if (chk->dev->type == &simple_device_type)
2396 device_set_present(chk->dev, false);
2397 device_set_link(chk->dev, false);
2398 chk->pending = err->error;
2399
2400 return NL_STOP;
2401 }
2402
2403 struct bridge_vlan_check_data {
2404 struct device *check_dev;
2405 int ifindex;
2406 int ret;
2407 bool pending;
2408 };
2409
2410 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2411 struct bridge_vlan_port *port,
2412 struct bridge_vlan_info *vinfo)
2413 {
2414 uint16_t flags = 0, diff, mask;
2415
2416 if (port->flags & BRVLAN_F_PVID)
2417 flags |= BRIDGE_VLAN_INFO_PVID;
2418 if (port->flags & BRVLAN_F_UNTAGGED)
2419 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2420
2421 diff = vinfo->flags ^ flags;
2422 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2423 if (diff & mask) {
2424 data->ret = 1;
2425 data->pending = false;
2426 }
2427
2428 port->check = 1;
2429 }
2430
2431 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2432 struct rtattr *attr)
2433 {
2434 struct bridge_vlan_hotplug_port *port;
2435 struct bridge_vlan_info *vinfo;
2436 struct bridge_vlan *vlan;
2437 struct rtattr *cur;
2438 int rem = RTA_PAYLOAD(attr);
2439 int i;
2440
2441 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2442 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2443 continue;
2444
2445 vinfo = RTA_DATA(cur);
2446 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2447 if (!vlan) {
2448 data->ret = 1;
2449 data->pending = false;
2450 return;
2451 }
2452
2453 for (i = 0; i < vlan->n_ports; i++)
2454 if (!vlan->ports[i].check)
2455 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2456
2457 list_for_each_entry(port, &vlan->hotplug_ports, list)
2458 if (!port->port.check)
2459 bridge_vlan_check_port(data, &port->port, vinfo);
2460 }
2461 }
2462
2463 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2464 {
2465 struct bridge_vlan_check_data *data = arg;
2466 struct nlmsghdr *nh = nlmsg_hdr(msg);
2467 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2468 struct rtattr *attr;
2469 int rem;
2470
2471 if (nh->nlmsg_type != RTM_NEWLINK)
2472 return NL_SKIP;
2473
2474 if (ifi->ifi_family != AF_BRIDGE)
2475 return NL_SKIP;
2476
2477 if (ifi->ifi_index != data->ifindex)
2478 return NL_SKIP;
2479
2480 attr = IFLA_RTA(ifi);
2481 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2482 while (RTA_OK(attr, rem)) {
2483 if (attr->rta_type == IFLA_AF_SPEC)
2484 bridge_vlan_check_attr(data, attr);
2485
2486 attr = RTA_NEXT(attr, rem);
2487 }
2488
2489 return NL_SKIP;
2490 }
2491
2492 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2493 {
2494 struct bridge_vlan_check_data *data = arg;
2495 data->pending = false;
2496 return NL_STOP;
2497 }
2498
2499 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2500 {
2501 struct bridge_vlan_check_data *data = arg;
2502 data->pending = false;
2503 return NL_STOP;
2504 }
2505
2506 int system_bridge_vlan_check(struct device *dev, char *ifname)
2507 {
2508 struct bridge_vlan_check_data data = {
2509 .check_dev = dev,
2510 .ifindex = if_nametoindex(ifname),
2511 .ret = -1,
2512 .pending = true,
2513 };
2514 static struct ifinfomsg ifi = {
2515 .ifi_family = AF_BRIDGE
2516 };
2517 static struct rtattr ext_req = {
2518 .rta_type = IFLA_EXT_MASK,
2519 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2520 };
2521 uint32_t filter = RTEXT_FILTER_BRVLAN;
2522 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2523 struct bridge_vlan *vlan;
2524 struct nl_msg *msg;
2525 int i;
2526
2527 if (!data.ifindex)
2528 return 0;
2529
2530 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2531
2532 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2533 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2534 nlmsg_append(msg, &filter, sizeof(filter), 0))
2535 goto free;
2536
2537 vlist_for_each_element(&dev->vlans, vlan, node) {
2538 struct bridge_vlan_hotplug_port *port;
2539
2540 for (i = 0; i < vlan->n_ports; i++) {
2541 if (!strcmp(vlan->ports[i].ifname, ifname))
2542 vlan->ports[i].check = 0;
2543 else
2544 vlan->ports[i].check = -1;
2545 }
2546
2547 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2548 if (!strcmp(port->port.ifname, ifname))
2549 port->port.check = 0;
2550 else
2551 port->port.check = -1;
2552 }
2553 }
2554
2555 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2556 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2557 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2558 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2559
2560 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2561 goto free;
2562
2563 data.ret = 0;
2564 while (data.pending)
2565 nl_recvmsgs(sock_rtnl, cb);
2566
2567 vlist_for_each_element(&dev->vlans, vlan, node) {
2568 struct bridge_vlan_hotplug_port *port;
2569
2570 for (i = 0; i < vlan->n_ports; i++) {
2571 if (!vlan->ports[i].check) {
2572 data.ret = 1;
2573 break;
2574 }
2575 }
2576
2577 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2578 if (!port->port.check) {
2579 data.ret = 1;
2580 break;
2581 }
2582 }
2583 }
2584
2585 free:
2586 nlmsg_free(msg);
2587 nl_cb_put(cb);
2588 return data.ret;
2589 }
2590
2591 int system_if_check(struct device *dev)
2592 {
2593 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2594 struct nl_msg *msg;
2595 struct ifinfomsg ifi = {
2596 .ifi_family = AF_UNSPEC,
2597 .ifi_index = 0,
2598 };
2599 struct if_check_data chk = {
2600 .dev = dev,
2601 .pending = 1,
2602 };
2603 int ret = 1;
2604
2605 if (!cb)
2606 return ret;
2607
2608 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2609 if (!msg)
2610 goto out;
2611
2612 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2613 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2614 goto free;
2615
2616 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2617 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2618 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2619
2620 ret = nl_send_auto_complete(sock_rtnl, msg);
2621 if (ret < 0)
2622 goto free;
2623
2624 while (chk.pending > 0)
2625 nl_recvmsgs(sock_rtnl, cb);
2626
2627 ret = chk.pending;
2628
2629 free:
2630 nlmsg_free(msg);
2631 out:
2632 nl_cb_put(cb);
2633 return ret;
2634 }
2635
2636 struct device *
2637 system_if_get_parent(struct device *dev)
2638 {
2639 char buf[64], *devname;
2640 int ifindex, iflink;
2641
2642 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2643 return NULL;
2644
2645 iflink = strtoul(buf, NULL, 0);
2646 ifindex = system_if_resolve(dev);
2647 if (!iflink || iflink == ifindex)
2648 return NULL;
2649
2650 devname = if_indextoname(iflink, buf);
2651 if (!devname)
2652 return NULL;
2653
2654 return device_get(devname, true);
2655 }
2656
2657 static bool
2658 read_string_file(int dir_fd, const char *file, char *buf, int len)
2659 {
2660 bool ret = false;
2661 char *c;
2662 int fd;
2663
2664 fd = openat(dir_fd, file, O_RDONLY);
2665 if (fd < 0)
2666 return false;
2667
2668 retry:
2669 len = read(fd, buf, len - 1);
2670 if (len < 0) {
2671 if (errno == EINTR)
2672 goto retry;
2673 } else if (len > 0) {
2674 buf[len] = 0;
2675
2676 c = strchr(buf, '\n');
2677 if (c)
2678 *c = 0;
2679
2680 ret = true;
2681 }
2682
2683 close(fd);
2684
2685 return ret;
2686 }
2687
2688 static bool
2689 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2690 {
2691 char buf[64];
2692 bool ret = false;
2693
2694 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2695 if (ret)
2696 *val = strtoull(buf, NULL, 0);
2697
2698 return ret;
2699 }
2700
2701 bool
2702 system_if_force_external(const char *ifname)
2703 {
2704 struct stat s;
2705
2706 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2707 }
2708
2709 static const char *
2710 system_netdevtype_name(unsigned short dev_type)
2711 {
2712 size_t i;
2713
2714 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2715 if (netdev_types[i].id == dev_type)
2716 return netdev_types[i].name;
2717 }
2718
2719 /* the last key is used by default */
2720 i = ARRAY_SIZE(netdev_types) - 1;
2721
2722 return netdev_types[i].name;
2723 }
2724
2725 static void
2726 system_add_devtype(struct blob_buf *b, const char *ifname)
2727 {
2728 char buf[100];
2729 bool found = false;
2730
2731 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2732 const char *info = "DEVTYPE=";
2733 char *context = NULL;
2734 const char *line = strtok_r(buf, "\r\n", &context);
2735
2736 while (line != NULL) {
2737 char *index = strstr(line, info);
2738
2739 if (index != NULL) {
2740 blobmsg_add_string(b, "devtype", index + strlen(info));
2741 found = true;
2742 break;
2743 }
2744
2745 line = strtok_r(NULL, "\r\n", &context);
2746 }
2747 }
2748
2749 if (!found) {
2750 unsigned short number = 0;
2751 const char *name = NULL;
2752
2753 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2754 number = strtoul(buf, NULL, 0);
2755 name = system_netdevtype_name(number);
2756 blobmsg_add_string(b, "devtype", name);
2757 }
2758 }
2759 }
2760
2761 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2762
2763 static int32_t
2764 ethtool_feature_count(const char *ifname)
2765 {
2766 struct {
2767 struct ethtool_sset_info hdr;
2768 uint32_t buf;
2769 } req = {
2770 .hdr = {
2771 .cmd = ETHTOOL_GSSET_INFO,
2772 .sset_mask = 1 << ETH_SS_FEATURES
2773 }
2774 };
2775
2776 struct ifreq ifr = {
2777 .ifr_data = (void *)&req
2778 };
2779
2780 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2781
2782 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2783 return -1;
2784
2785 if (!req.hdr.sset_mask)
2786 return 0;
2787
2788 return req.buf;
2789 }
2790
2791 static int32_t
2792 ethtool_feature_index(const char *ifname, const char *keyname)
2793 {
2794 struct ethtool_gstrings *feature_names;
2795 struct ifreq ifr = { 0 };
2796 int32_t n_features;
2797 uint32_t i;
2798
2799 n_features = ethtool_feature_count(ifname);
2800
2801 if (n_features <= 0)
2802 return -1;
2803
2804 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2805
2806 if (!feature_names)
2807 return -1;
2808
2809 feature_names->cmd = ETHTOOL_GSTRINGS;
2810 feature_names->string_set = ETH_SS_FEATURES;
2811 feature_names->len = n_features;
2812
2813 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2814 ifr.ifr_data = (void *)feature_names;
2815
2816 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2817 free(feature_names);
2818
2819 return -1;
2820 }
2821
2822 for (i = 0; i < feature_names->len; i++)
2823 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2824 break;
2825
2826 if (i >= feature_names->len)
2827 i = -1;
2828
2829 free(feature_names);
2830
2831 return i;
2832 }
2833
2834 static bool
2835 ethtool_feature_value(const char *ifname, const char *keyname)
2836 {
2837 struct ethtool_get_features_block *feature_block;
2838 struct ethtool_gfeatures *feature_values;
2839 struct ifreq ifr = { 0 };
2840 int32_t feature_idx;
2841 bool active;
2842
2843 feature_idx = ethtool_feature_index(ifname, keyname);
2844
2845 if (feature_idx < 0)
2846 return false;
2847
2848 feature_values = calloc(1,
2849 sizeof(*feature_values) +
2850 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2851
2852 if (!feature_values)
2853 return false;
2854
2855 feature_values->cmd = ETHTOOL_GFEATURES;
2856 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2857
2858 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2859 ifr.ifr_data = (void *)feature_values;
2860
2861 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2862 free(feature_values);
2863
2864 return false;
2865 }
2866
2867 feature_block = &feature_values->features[feature_idx / 32];
2868 active = feature_block->active & (1U << feature_idx % 32);
2869
2870 free(feature_values);
2871
2872 return active;
2873 }
2874
2875 static void
2876 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2877 {
2878 char *buf;
2879
2880 /* allocate string buffer large enough for the mode name and a suffix
2881 * "-F" or "-H" indicating full duplex or half duplex.
2882 */
2883 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2884 if (!buf)
2885 return;
2886
2887 strcpy(buf, ethtool_modes[i].name);
2888 if (half)
2889 strcat(buf, "-H");
2890 else
2891 strcat(buf, "-F");
2892
2893 blobmsg_add_string_buffer(b);
2894 }
2895
2896 static void
2897 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2898 {
2899 size_t i;
2900
2901 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2902 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2903 system_add_link_mode_name(b, i, true);
2904
2905 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2906 system_add_link_mode_name(b, i, false);
2907 }
2908 }
2909
2910 static void
2911 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2912 {
2913 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2914 blobmsg_add_string(b, NULL, "pause");
2915
2916 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2917 blobmsg_add_string(b, NULL, "asym_pause");
2918 }
2919
2920
2921 static void
2922 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2923 __u32 *advertising, __u32 *lp_advertising)
2924 {
2925 bool an_rx = false, an_tx = false;
2926 void *d;
2927
2928 d = blobmsg_open_array(b, "negotiated");
2929
2930 /* Work out negotiated pause frame usage per
2931 * IEEE 802.3-2005 table 28B-3.
2932 */
2933 if (ethtool_link_mode_test_bit(nwords,
2934 ETHTOOL_LINK_MODE_Pause_BIT,
2935 advertising) &&
2936 ethtool_link_mode_test_bit(nwords,
2937 ETHTOOL_LINK_MODE_Pause_BIT,
2938 lp_advertising)) {
2939 an_tx = true;
2940 an_rx = true;
2941 } else if (ethtool_link_mode_test_bit(nwords,
2942 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2943 advertising) &&
2944 ethtool_link_mode_test_bit(nwords,
2945 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2946 lp_advertising)) {
2947 if (ethtool_link_mode_test_bit(nwords,
2948 ETHTOOL_LINK_MODE_Pause_BIT,
2949 advertising))
2950 an_rx = true;
2951 else if (ethtool_link_mode_test_bit(nwords,
2952 ETHTOOL_LINK_MODE_Pause_BIT,
2953 lp_advertising))
2954 an_tx = true;
2955 }
2956 if (an_tx)
2957 blobmsg_add_string(b, NULL, "rx");
2958
2959 if (an_rx)
2960 blobmsg_add_string(b, NULL, "tx");
2961
2962 blobmsg_close_array(b, d);
2963 }
2964
2965 static void
2966 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2967 {
2968 struct ethtool_pauseparam pp;
2969 struct ifreq ifr = {
2970 .ifr_data = (caddr_t)&pp,
2971 };
2972
2973 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2974 memset(&pp, 0, sizeof(pp));
2975 pp.cmd = ETHTOOL_GPAUSEPARAM;
2976
2977 /* may fail */
2978 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2979 *pause_autoneg = true;
2980 return;
2981 }
2982
2983 *rx_pause = pp.rx_pause;
2984 *tx_pause = pp.tx_pause;
2985 *pause_autoneg = pp.autoneg;
2986 }
2987
2988 int
2989 system_if_dump_info(struct device *dev, struct blob_buf *b)
2990 {
2991 __u32 *supported, *advertising, *lp_advertising;
2992 bool rx_pause, tx_pause, pause_autoneg;
2993 struct {
2994 struct ethtool_link_settings req;
2995 __u32 link_mode_data[3 * 127];
2996 } ecmd;
2997 struct ifreq ifr = {
2998 .ifr_data = (caddr_t)&ecmd,
2999 };
3000 __s8 nwords;
3001 void *c, *d;
3002 char *s;
3003
3004 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
3005
3006 memset(&ecmd, 0, sizeof(ecmd));
3007 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
3008 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
3009
3010 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3011 ecmd.req.link_mode_masks_nwords >= 0 ||
3012 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3013 return -EOPNOTSUPP;
3014
3015 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
3016
3017 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3018 ecmd.req.link_mode_masks_nwords <= 0 ||
3019 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3020 return -EIO;
3021
3022 nwords = ecmd.req.link_mode_masks_nwords;
3023 supported = &ecmd.link_mode_data[0];
3024 advertising = &ecmd.link_mode_data[nwords];
3025 lp_advertising = &ecmd.link_mode_data[2 * nwords];
3026
3027 c = blobmsg_open_array(b, "link-advertising");
3028 system_add_link_modes(nwords, b, advertising);
3029 blobmsg_close_array(b, c);
3030
3031 c = blobmsg_open_array(b, "link-partner-advertising");
3032 system_add_link_modes(nwords, b, lp_advertising);
3033 blobmsg_close_array(b, c);
3034
3035 c = blobmsg_open_array(b, "link-supported");
3036 system_add_link_modes(nwords, b, supported);
3037 blobmsg_close_array(b, c);
3038
3039 if (ethtool_validate_speed(ecmd.req.speed) &&
3040 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
3041 (ecmd.req.speed != 0)) {
3042 s = blobmsg_alloc_string_buffer(b, "speed", 10);
3043 snprintf(s, 8, "%d%c", ecmd.req.speed,
3044 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
3045 blobmsg_add_string_buffer(b);
3046 }
3047 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
3048
3049 c = blobmsg_open_table(b, "flow-control");
3050 blobmsg_add_u8(b, "autoneg", pause_autoneg);
3051
3052 d = blobmsg_open_array(b, "supported");
3053 system_add_pause_modes(nwords, b, supported);
3054 blobmsg_close_array(b, d);
3055
3056 if (pause_autoneg) {
3057 d = blobmsg_open_array(b, "link-advertising");
3058 system_add_pause_modes(nwords, b, advertising);
3059 blobmsg_close_array(b, d);
3060 }
3061
3062 d = blobmsg_open_array(b, "link-partner-advertising");
3063 system_add_pause_modes(nwords, b, lp_advertising);
3064 blobmsg_close_array(b, d);
3065
3066 if (pause_autoneg) {
3067 system_add_ethtool_pause_an(b, nwords, advertising,
3068 lp_advertising);
3069 } else {
3070 d = blobmsg_open_array(b, "selected");
3071 if (rx_pause)
3072 blobmsg_add_string(b, NULL, "rx");
3073
3074 if (tx_pause)
3075 blobmsg_add_string(b, NULL, "tx");
3076
3077 blobmsg_close_array(b, d);
3078 }
3079
3080 blobmsg_close_table(b, c);
3081
3082 blobmsg_add_u8(b, "hw-tc-offload",
3083 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
3084
3085 system_add_devtype(b, dev->ifname);
3086
3087 return 0;
3088 }
3089
3090 int
3091 system_if_dump_stats(struct device *dev, struct blob_buf *b)
3092 {
3093 const char *const counters[] = {
3094 "collisions", "rx_frame_errors", "tx_compressed",
3095 "multicast", "rx_length_errors", "tx_dropped",
3096 "rx_bytes", "rx_missed_errors", "tx_errors",
3097 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
3098 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
3099 "rx_dropped", "tx_aborted_errors", "tx_packets",
3100 "rx_errors", "tx_bytes", "tx_window_errors",
3101 "rx_fifo_errors", "tx_carrier_errors",
3102 };
3103 int stats_dir;
3104 size_t i;
3105 uint64_t val = 0;
3106
3107 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
3108 if (stats_dir < 0)
3109 return -1;
3110
3111 for (i = 0; i < ARRAY_SIZE(counters); i++)
3112 if (read_uint64_file(stats_dir, counters[i], &val))
3113 blobmsg_add_u64(b, counters[i], val);
3114
3115 close(stats_dir);
3116 return 0;
3117 }
3118
3119 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
3120 {
3121 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
3122 int alen = v4 ? 4 : 16;
3123 unsigned int flags = 0;
3124 struct ifaddrmsg ifa = {
3125 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
3126 .ifa_prefixlen = addr->mask,
3127 .ifa_index = dev->ifindex,
3128 };
3129
3130 struct nl_msg *msg;
3131 if (cmd == RTM_NEWADDR)
3132 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3133
3134 msg = nlmsg_alloc_simple(cmd, flags);
3135 if (!msg)
3136 return -1;
3137
3138 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
3139 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
3140 if (v4) {
3141 if (addr->broadcast)
3142 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
3143 if (addr->point_to_point)
3144 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
3145 } else {
3146 time_t now = system_get_rtime();
3147 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
3148
3149 if (addr->preferred_until) {
3150 int64_t preferred = addr->preferred_until - now;
3151 if (preferred < 0)
3152 preferred = 0;
3153 else if (preferred > UINT32_MAX)
3154 preferred = UINT32_MAX;
3155
3156 cinfo.ifa_prefered = preferred;
3157 }
3158
3159 if (addr->valid_until) {
3160 int64_t valid = addr->valid_until - now;
3161 if (valid <= 0) {
3162 nlmsg_free(msg);
3163 return -1;
3164 }
3165 else if (valid > UINT32_MAX)
3166 valid = UINT32_MAX;
3167
3168 cinfo.ifa_valid = valid;
3169 }
3170
3171 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
3172
3173 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
3174 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
3175 }
3176
3177 return system_rtnl_call(msg);
3178 }
3179
3180 int system_add_address(struct device *dev, struct device_addr *addr)
3181 {
3182 return system_addr(dev, addr, RTM_NEWADDR);
3183 }
3184
3185 int system_del_address(struct device *dev, struct device_addr *addr)
3186 {
3187 return system_addr(dev, addr, RTM_DELADDR);
3188 }
3189
3190 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
3191 {
3192 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3193 unsigned int flags = 0;
3194 struct ndmsg ndm = {
3195 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
3196 .ndm_ifindex = dev->ifindex,
3197 .ndm_state = NUD_PERMANENT,
3198 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
3199 };
3200 struct nl_msg *msg;
3201
3202 if (cmd == RTM_NEWNEIGH)
3203 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3204
3205 msg = nlmsg_alloc_simple(cmd, flags);
3206
3207 if (!msg)
3208 return -1;
3209
3210 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
3211
3212 nla_put(msg, NDA_DST, alen, &neighbor->addr);
3213 if (neighbor->flags & DEVNEIGH_MAC)
3214 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
3215
3216
3217 return system_rtnl_call(msg);
3218 }
3219
3220 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
3221 {
3222 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
3223 }
3224
3225 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
3226 {
3227 return system_neigh(dev, neighbor, RTM_DELNEIGH);
3228 }
3229
3230 static int system_rt(struct device *dev, struct device_route *route, int cmd)
3231 {
3232 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3233 bool have_gw;
3234 unsigned int flags = 0;
3235
3236 if (alen == 4)
3237 have_gw = !!route->nexthop.in.s_addr;
3238 else
3239 have_gw = route->nexthop.in6.s6_addr32[0] ||
3240 route->nexthop.in6.s6_addr32[1] ||
3241 route->nexthop.in6.s6_addr32[2] ||
3242 route->nexthop.in6.s6_addr32[3];
3243
3244 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
3245 ? route->table : RT_TABLE_MAIN;
3246
3247 struct rtmsg rtm = {
3248 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3249 .rtm_dst_len = route->mask,
3250 .rtm_src_len = route->sourcemask,
3251 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
3252 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
3253 .rtm_scope = RT_SCOPE_NOWHERE,
3254 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
3255 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
3256 };
3257 struct nl_msg *msg;
3258
3259 if (cmd == RTM_NEWROUTE) {
3260 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3261
3262 if (!dev) { /* Add null-route */
3263 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3264 rtm.rtm_type = RTN_UNREACHABLE;
3265 }
3266 else
3267 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3268 }
3269
3270 if (route->flags & DEVROUTE_TYPE) {
3271 rtm.rtm_type = route->type;
3272 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3273 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3274 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3275 rtm.rtm_table = RT_TABLE_LOCAL;
3276 }
3277
3278 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3279 rtm.rtm_scope = RT_SCOPE_HOST;
3280 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3281 rtm.rtm_type == RTN_ANYCAST) {
3282 rtm.rtm_scope = RT_SCOPE_LINK;
3283 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3284 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3285 rtm.rtm_type == RTN_THROW) {
3286 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3287 dev = NULL;
3288 }
3289 }
3290
3291 if (route->flags & DEVROUTE_NODEV)
3292 dev = NULL;
3293
3294 msg = nlmsg_alloc_simple(cmd, flags);
3295 if (!msg)
3296 return -1;
3297
3298 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3299
3300 if (route->mask)
3301 nla_put(msg, RTA_DST, alen, &route->addr);
3302
3303 if (route->sourcemask) {
3304 if (rtm.rtm_family == AF_INET)
3305 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3306 else
3307 nla_put(msg, RTA_SRC, alen, &route->source);
3308 }
3309
3310 if (route->metric > 0)
3311 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3312
3313 if (have_gw)
3314 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3315
3316 if (dev)
3317 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3318
3319 if (table >= 256)
3320 nla_put_u32(msg, RTA_TABLE, table);
3321
3322 if (route->flags & DEVROUTE_MTU) {
3323 struct nlattr *metrics;
3324
3325 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3326 goto nla_put_failure;
3327
3328 nla_put_u32(msg, RTAX_MTU, route->mtu);
3329
3330 nla_nest_end(msg, metrics);
3331 }
3332
3333 return system_rtnl_call(msg);
3334
3335 nla_put_failure:
3336 nlmsg_free(msg);
3337 return -ENOMEM;
3338 }
3339
3340 int system_add_route(struct device *dev, struct device_route *route)
3341 {
3342 return system_rt(dev, route, RTM_NEWROUTE);
3343 }
3344
3345 int system_del_route(struct device *dev, struct device_route *route)
3346 {
3347 return system_rt(dev, route, RTM_DELROUTE);
3348 }
3349
3350 int system_flush_routes(void)
3351 {
3352 const char *names[] = { "ipv4", "ipv6" };
3353 size_t i;
3354 int fd;
3355
3356 for (i = 0; i < ARRAY_SIZE(names); i++) {
3357 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3358 fd = open(dev_buf, O_WRONLY);
3359 if (fd < 0)
3360 continue;
3361
3362 if (write(fd, "-1", 2)) {}
3363 close(fd);
3364 }
3365 return 0;
3366 }
3367
3368 bool system_resolve_rt_type(const char *type, unsigned int *id)
3369 {
3370 return system_rtn_aton(type, id);
3371 }
3372
3373 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3374 {
3375 FILE *f;
3376 char *e, buf[128];
3377 unsigned int n, proto = 256;
3378 n = strtoul(type, &e, 0);
3379 if (!*e && e != type)
3380 proto = n;
3381 else if (!strcmp(type, "unspec"))
3382 proto = RTPROT_UNSPEC;
3383 else if (!strcmp(type, "kernel"))
3384 proto = RTPROT_KERNEL;
3385 else if (!strcmp(type, "boot"))
3386 proto = RTPROT_BOOT;
3387 else if (!strcmp(type, "static"))
3388 proto = RTPROT_STATIC;
3389 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3390 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3391 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3392 continue;
3393
3394 n = strtoul(e, NULL, 10);
3395 e = strtok(NULL, " \t\n");
3396
3397 if (e && !strcmp(e, type)) {
3398 proto = n;
3399 break;
3400 }
3401 }
3402 fclose(f);
3403 }
3404
3405 if (proto > 255)
3406 return false;
3407
3408 *id = proto;
3409 return true;
3410 }
3411
3412 bool system_resolve_rt_table(const char *name, unsigned int *id)
3413 {
3414 FILE *f;
3415 char *e, buf[128];
3416 unsigned int n, table = RT_TABLE_UNSPEC;
3417
3418 /* first try to parse table as number */
3419 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3420 table = n;
3421
3422 /* handle well known aliases */
3423 else if (!strcmp(name, "default"))
3424 table = RT_TABLE_DEFAULT;
3425 else if (!strcmp(name, "main"))
3426 table = RT_TABLE_MAIN;
3427 else if (!strcmp(name, "local"))
3428 table = RT_TABLE_LOCAL;
3429
3430 /* try to look up name in /etc/iproute2/rt_tables */
3431 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3432 {
3433 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3434 {
3435 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3436 continue;
3437
3438 n = strtoul(e, NULL, 10);
3439 e = strtok(NULL, " \t\n");
3440
3441 if (e && !strcmp(e, name))
3442 {
3443 table = n;
3444 break;
3445 }
3446 }
3447
3448 fclose(f);
3449 }
3450
3451 if (table == RT_TABLE_UNSPEC)
3452 return false;
3453
3454 *id = table;
3455 return true;
3456 }
3457
3458 bool system_is_default_rt_table(unsigned int id)
3459 {
3460 return (id == RT_TABLE_MAIN);
3461 }
3462
3463 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3464 {
3465 char *e;
3466 unsigned int n;
3467
3468 if (!strcmp(filter, "strict"))
3469 n = 1;
3470 else if (!strcmp(filter, "loose"))
3471 n = 2;
3472 else {
3473 n = strtoul(filter, &e, 0);
3474 if (*e || e == filter || n > 2)
3475 return false;
3476 }
3477
3478 *id = n;
3479 return true;
3480 }
3481
3482 static int system_iprule(struct iprule *rule, int cmd)
3483 {
3484 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3485
3486 struct nl_msg *msg;
3487 struct rtmsg rtm = {
3488 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3489 .rtm_protocol = RTPROT_STATIC,
3490 .rtm_scope = RT_SCOPE_UNIVERSE,
3491 .rtm_table = RT_TABLE_UNSPEC,
3492 .rtm_type = RTN_UNSPEC,
3493 .rtm_flags = 0,
3494 };
3495
3496 if (cmd == RTM_NEWRULE)
3497 rtm.rtm_type = RTN_UNICAST;
3498
3499 if (rule->invert)
3500 rtm.rtm_flags |= FIB_RULE_INVERT;
3501
3502 if (rule->flags & IPRULE_SRC)
3503 rtm.rtm_src_len = rule->src_mask;
3504
3505 if (rule->flags & IPRULE_DEST)
3506 rtm.rtm_dst_len = rule->dest_mask;
3507
3508 if (rule->flags & IPRULE_TOS)
3509 rtm.rtm_tos = rule->tos;
3510
3511 if (rule->flags & IPRULE_LOOKUP) {
3512 if (rule->lookup < 256)
3513 rtm.rtm_table = rule->lookup;
3514 }
3515
3516 if (rule->flags & IPRULE_ACTION)
3517 rtm.rtm_type = rule->action;
3518 else if (rule->flags & IPRULE_GOTO)
3519 rtm.rtm_type = FR_ACT_GOTO;
3520 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3521 rtm.rtm_type = FR_ACT_NOP;
3522
3523 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3524
3525 if (!msg)
3526 return -1;
3527
3528 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3529
3530 if (rule->flags & IPRULE_IN)
3531 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3532
3533 if (rule->flags & IPRULE_OUT)
3534 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3535
3536 if (rule->flags & IPRULE_SRC)
3537 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3538
3539 if (rule->flags & IPRULE_DEST)
3540 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3541
3542 if (rule->flags & IPRULE_PRIORITY)
3543 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3544 else if (cmd == RTM_NEWRULE)
3545 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3546
3547 if (rule->flags & IPRULE_FWMARK)
3548 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3549
3550 if (rule->flags & IPRULE_FWMASK)
3551 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3552
3553 if (rule->flags & IPRULE_LOOKUP) {
3554 if (rule->lookup >= 256)
3555 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3556 }
3557
3558 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3559 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3560
3561 if (rule->flags & IPRULE_UIDRANGE) {
3562 struct fib_rule_uid_range uidrange = {
3563 .start = rule->uidrange_start,
3564 .end = rule->uidrange_end
3565 };
3566
3567 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3568 }
3569
3570 if (rule->flags & IPRULE_GOTO)
3571 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3572
3573 return system_rtnl_call(msg);
3574 }
3575
3576 int system_add_iprule(struct iprule *rule)
3577 {
3578 return system_iprule(rule, RTM_NEWRULE);
3579 }
3580
3581 int system_del_iprule(struct iprule *rule)
3582 {
3583 return system_iprule(rule, RTM_DELRULE);
3584 }
3585
3586 int system_flush_iprules(void)
3587 {
3588 int rv = 0;
3589 struct iprule rule;
3590
3591 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3592 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3593
3594 memset(&rule, 0, sizeof(rule));
3595
3596
3597 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3598
3599 rule.priority = 0;
3600 rule.lookup = RT_TABLE_LOCAL;
3601 rv |= system_iprule(&rule, RTM_NEWRULE);
3602
3603 rule.priority = 32766;
3604 rule.lookup = RT_TABLE_MAIN;
3605 rv |= system_iprule(&rule, RTM_NEWRULE);
3606
3607 rule.priority = 32767;
3608 rule.lookup = RT_TABLE_DEFAULT;
3609 rv |= system_iprule(&rule, RTM_NEWRULE);
3610
3611
3612 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3613
3614 rule.priority = 0;
3615 rule.lookup = RT_TABLE_LOCAL;
3616 rv |= system_iprule(&rule, RTM_NEWRULE);
3617
3618 rule.priority = 32766;
3619 rule.lookup = RT_TABLE_MAIN;
3620 rv |= system_iprule(&rule, RTM_NEWRULE);
3621
3622 return rv;
3623 }
3624
3625 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3626 {
3627 return system_rtn_aton(action, id);
3628 }
3629
3630 time_t system_get_rtime(void)
3631 {
3632 struct timespec ts;
3633 struct timeval tv;
3634
3635 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3636 return ts.tv_sec;
3637
3638 if (gettimeofday(&tv, NULL) == 0)
3639 return tv.tv_sec;
3640
3641 return 0;
3642 }
3643
3644 #ifndef IP_DF
3645 #define IP_DF 0x4000
3646 #endif
3647
3648 static int tunnel_ioctl(const char *name, int cmd, void *p)
3649 {
3650 struct ifreq ifr;
3651
3652 memset(&ifr, 0, sizeof(ifr));
3653 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3654 ifr.ifr_ifru.ifru_data = p;
3655 return ioctl(sock_ioctl, cmd, &ifr);
3656 }
3657
3658 #ifdef IFLA_IPTUN_MAX
3659 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3660 struct blob_attr **tb)
3661 {
3662 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3663 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3664 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3665 struct blob_attr *cur;
3666 int ret = 0, ttl = 0;
3667
3668 if (!nlm)
3669 return -1;
3670
3671 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3672 nla_put_string(nlm, IFLA_IFNAME, name);
3673
3674 if (link)
3675 nla_put_u32(nlm, IFLA_LINK, link);
3676
3677 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3678 if (!linkinfo) {
3679 ret = -ENOMEM;
3680 goto failure;
3681 }
3682
3683 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3684 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3685 if (!infodata) {
3686 ret = -ENOMEM;
3687 goto failure;
3688 }
3689
3690 if (link)
3691 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3692
3693 if ((cur = tb[TUNNEL_ATTR_TTL]))
3694 ttl = blobmsg_get_u32(cur);
3695
3696 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3697 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3698
3699 struct in6_addr in6buf;
3700 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3701 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3702 ret = -EINVAL;
3703 goto failure;
3704 }
3705 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3706 }
3707
3708 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3709 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3710 ret = -EINVAL;
3711 goto failure;
3712 }
3713 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3714 }
3715
3716 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3717 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3718 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3719
3720 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3721 blobmsg_data(cur), blobmsg_len(cur));
3722
3723 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3724 char *str = blobmsg_get_string(cur);
3725
3726 if (strcmp(str, "ignore")) {
3727 char *e;
3728 unsigned encap_limit = strtoul(str, &e, 0);
3729
3730 if (e == str || *e || encap_limit > 255) {
3731 ret = -EINVAL;
3732 goto failure;
3733 }
3734
3735 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3736 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3737 }
3738 }
3739
3740 #ifdef IFLA_IPTUN_FMR_MAX
3741 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3742 struct blob_attr *rcur;
3743 unsigned rrem, fmrcnt = 0;
3744 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3745
3746 if (!fmrs) {
3747 ret = -ENOMEM;
3748 goto failure;
3749 }
3750
3751 blobmsg_for_each_attr(rcur, cur, rrem) {
3752 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3753 struct in6_addr ip6prefix;
3754 struct in_addr ip4prefix;
3755 unsigned ip4len, ip6len, ealen, offset;
3756
3757 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3758 blobmsg_data(rcur), blobmsg_len(rcur));
3759
3760 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3761 !parse_ip_and_netmask(AF_INET6,
3762 blobmsg_data(tb_cur), &ip6prefix,
3763 &ip6len)) {
3764 ret = -EINVAL;
3765 goto failure;
3766 }
3767
3768 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3769 !parse_ip_and_netmask(AF_INET,
3770 blobmsg_data(tb_cur), &ip4prefix,
3771 &ip4len)) {
3772 ret = -EINVAL;
3773 goto failure;
3774 }
3775
3776 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3777 ret = -EINVAL;
3778 goto failure;
3779 }
3780 ealen = blobmsg_get_u32(tb_cur);
3781
3782 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3783 ret = -EINVAL;
3784 goto failure;
3785 }
3786 offset = blobmsg_get_u32(tb_cur);
3787
3788 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3789 if (!rule) {
3790 ret = -ENOMEM;
3791 goto failure;
3792 }
3793
3794 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3795 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3796 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3797 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3798 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3799 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3800
3801 nla_nest_end(nlm, rule);
3802 }
3803
3804 nla_nest_end(nlm, fmrs);
3805 }
3806 #endif
3807 if (tun_flags)
3808 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3809 }
3810
3811 nla_nest_end(nlm, infodata);
3812 nla_nest_end(nlm, linkinfo);
3813
3814 return system_rtnl_call(nlm);
3815
3816 failure:
3817 nlmsg_free(nlm);
3818 return ret;
3819 }
3820 #endif
3821
3822 #ifdef IFLA_IPTUN_MAX
3823 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3824 static int system_add_gre_tunnel(const char *name, const char *kind,
3825 const unsigned int link, struct blob_attr **tb, bool v6)
3826 {
3827 struct nl_msg *nlm;
3828 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3829 struct blob_attr *cur;
3830 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3831 uint16_t iflags = 0, oflags = 0;
3832 uint8_t tos = 0;
3833 int ret = 0, ttl = 0;
3834 unsigned encap_limit = 0;
3835
3836 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3837 if (!nlm)
3838 return -1;
3839
3840 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3841 nla_put_string(nlm, IFLA_IFNAME, name);
3842
3843 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3844 if (!linkinfo) {
3845 ret = -ENOMEM;
3846 goto failure;
3847 }
3848
3849 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3850 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3851 if (!infodata) {
3852 ret = -ENOMEM;
3853 goto failure;
3854 }
3855
3856 if (link)
3857 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3858
3859 if ((cur = tb[TUNNEL_ATTR_TTL]))
3860 ttl = blobmsg_get_u32(cur);
3861
3862 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3863 char *str = blobmsg_get_string(cur);
3864 if (strcmp(str, "inherit")) {
3865 unsigned uval;
3866
3867 if (!system_tos_aton(str, &uval)) {
3868 ret = -EINVAL;
3869 goto failure;
3870 }
3871
3872 if (v6)
3873 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3874 else
3875 tos = uval;
3876 } else {
3877 if (v6)
3878 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3879 else
3880 tos = 1;
3881 }
3882 }
3883
3884 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3885 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3886
3887 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3888 blobmsg_data(cur), blobmsg_len(cur));
3889
3890 if ((cur = tb_data[GRE_DATA_IKEY])) {
3891 if ((ikey = blobmsg_get_u32(cur)))
3892 iflags |= GRE_KEY;
3893 }
3894
3895 if ((cur = tb_data[GRE_DATA_OKEY])) {
3896 if ((okey = blobmsg_get_u32(cur)))
3897 oflags |= GRE_KEY;
3898 }
3899
3900 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3901 if (blobmsg_get_bool(cur))
3902 iflags |= GRE_CSUM;
3903 }
3904
3905 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3906 if (blobmsg_get_bool(cur))
3907 oflags |= GRE_CSUM;
3908 }
3909
3910 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3911 if (blobmsg_get_bool(cur))
3912 iflags |= GRE_SEQ;
3913 }
3914
3915 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3916 if (blobmsg_get_bool(cur))
3917 oflags |= GRE_SEQ;
3918 }
3919
3920 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3921 char *str = blobmsg_get_string(cur);
3922
3923 if (strcmp(str, "ignore")) {
3924 char *e;
3925
3926 encap_limit = strtoul(str, &e, 0);
3927
3928 if (e == str || *e || encap_limit > 255) {
3929 ret = -EINVAL;
3930 goto failure;
3931 }
3932
3933 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3934 }
3935 }
3936 }
3937
3938 if (v6) {
3939 struct in6_addr in6buf;
3940 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3941 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3942 ret = -EINVAL;
3943 goto failure;
3944 }
3945 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3946 }
3947
3948 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3949 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3950 ret = -EINVAL;
3951 goto failure;
3952 }
3953 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3954 }
3955
3956 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3957 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3958
3959 if (flowinfo)
3960 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3961
3962 if (flags6)
3963 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3964
3965 if (!ttl)
3966 ttl = 64;
3967 } else {
3968 struct in_addr inbuf;
3969 bool set_df = true;
3970
3971 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3972 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3973 ret = -EINVAL;
3974 goto failure;
3975 }
3976 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3977 }
3978
3979 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3980 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3981 ret = -EINVAL;
3982 goto failure;
3983 }
3984 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3985
3986 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3987 if (!okey) {
3988 okey = inbuf.s_addr;
3989 oflags |= GRE_KEY;
3990 }
3991
3992 if (!ikey) {
3993 ikey = inbuf.s_addr;
3994 iflags |= GRE_KEY;
3995 }
3996 }
3997 }
3998
3999 if ((cur = tb[TUNNEL_ATTR_DF]))
4000 set_df = blobmsg_get_bool(cur);
4001
4002 if (!set_df) {
4003 /* ttl != 0 and nopmtudisc are incompatible */
4004 if (ttl) {
4005 ret = -EINVAL;
4006 goto failure;
4007 }
4008 } else if (!ttl)
4009 ttl = 64;
4010
4011 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
4012
4013 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
4014 }
4015
4016 if (ttl)
4017 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
4018
4019 if (oflags)
4020 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
4021
4022 if (iflags)
4023 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
4024
4025 if (okey)
4026 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
4027
4028 if (ikey)
4029 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
4030
4031 nla_nest_end(nlm, infodata);
4032 nla_nest_end(nlm, linkinfo);
4033
4034 return system_rtnl_call(nlm);
4035
4036 failure:
4037 nlmsg_free(nlm);
4038 return ret;
4039 }
4040 #endif
4041
4042 #ifdef IFLA_VTI_MAX
4043 static int system_add_vti_tunnel(const char *name, const char *kind,
4044 const unsigned int link, struct blob_attr **tb, bool v6)
4045 {
4046 struct nl_msg *nlm;
4047 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4048 struct blob_attr *cur;
4049 int ret = 0;
4050
4051 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4052 if (!nlm)
4053 return -1;
4054
4055 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4056 nla_put_string(nlm, IFLA_IFNAME, name);
4057
4058 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4059 if (!linkinfo) {
4060 ret = -ENOMEM;
4061 goto failure;
4062 }
4063
4064 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4065 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4066 if (!infodata) {
4067 ret = -ENOMEM;
4068 goto failure;
4069 }
4070
4071 if (link)
4072 nla_put_u32(nlm, IFLA_VTI_LINK, link);
4073
4074 if (v6) {
4075 struct in6_addr in6buf;
4076 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4077 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4078 ret = -EINVAL;
4079 goto failure;
4080 }
4081 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
4082 }
4083
4084 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4085 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4086 ret = -EINVAL;
4087 goto failure;
4088 }
4089 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
4090 }
4091
4092 } else {
4093 struct in_addr inbuf;
4094
4095 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4096 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4097 ret = -EINVAL;
4098 goto failure;
4099 }
4100 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
4101 }
4102
4103 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4104 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4105 ret = -EINVAL;
4106 goto failure;
4107 }
4108 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
4109 }
4110
4111 }
4112
4113 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4114 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
4115 uint32_t ikey = 0, okey = 0;
4116
4117 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
4118 blobmsg_data(cur), blobmsg_len(cur));
4119
4120 if ((cur = tb_data[VTI_DATA_IKEY])) {
4121 if ((ikey = blobmsg_get_u32(cur)))
4122 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
4123 }
4124
4125 if ((cur = tb_data[VTI_DATA_OKEY])) {
4126 if ((okey = blobmsg_get_u32(cur)))
4127 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
4128 }
4129 }
4130
4131 nla_nest_end(nlm, infodata);
4132 nla_nest_end(nlm, linkinfo);
4133
4134 return system_rtnl_call(nlm);
4135
4136 failure:
4137 nlmsg_free(nlm);
4138 return ret;
4139 }
4140 #endif
4141
4142 #ifdef IFLA_XFRM_MAX
4143 static int system_add_xfrm_tunnel(const char *name, const char *kind,
4144 const unsigned int link, struct blob_attr **tb)
4145 {
4146 struct nl_msg *nlm;
4147 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4148 struct blob_attr *cur;
4149 int ret = 0;
4150
4151 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4152 if (!nlm)
4153 return -1;
4154
4155 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4156 nla_put_string(nlm, IFLA_IFNAME, name);
4157
4158 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4159 if (!linkinfo) {
4160 ret = -ENOMEM;
4161 goto failure;
4162 }
4163
4164 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4165 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4166 if (!infodata) {
4167 ret = -ENOMEM;
4168 goto failure;
4169 }
4170
4171 if (link)
4172 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
4173
4174 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4175 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
4176 uint32_t if_id = 0;
4177
4178 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
4179 blobmsg_data(cur), blobmsg_len(cur));
4180
4181 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
4182 if ((if_id = blobmsg_get_u32(cur)))
4183 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
4184 }
4185
4186 }
4187
4188 nla_nest_end(nlm, infodata);
4189 nla_nest_end(nlm, linkinfo);
4190
4191 return system_rtnl_call(nlm);
4192
4193 failure:
4194 nlmsg_free(nlm);
4195 return ret;
4196 }
4197 #endif
4198
4199 #ifdef IFLA_VXLAN_MAX
4200 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
4201 struct blob_attr *cur;
4202 if ((cur = tb_data[vxlandatatype])) {
4203 bool val = blobmsg_get_bool(cur);
4204 if (invert)
4205 val = !val;
4206
4207 if ((attrtype == IFLA_VXLAN_GBP) && val)
4208 nla_put_flag(msg, attrtype);
4209 else
4210 nla_put_u8(msg, attrtype, val);
4211
4212 }
4213 }
4214
4215 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
4216 {
4217 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
4218 struct nl_msg *msg;
4219 struct nlattr *linkinfo, *data;
4220 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
4221 struct blob_attr *cur;
4222 int ret = 0;
4223
4224 if ((cur = tb[TUNNEL_ATTR_DATA]))
4225 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
4226 blobmsg_data(cur), blobmsg_len(cur));
4227 else
4228 return -EINVAL;
4229
4230 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
4231
4232 if (!msg)
4233 return -1;
4234
4235 nlmsg_append(msg, &iim, sizeof(iim), 0);
4236
4237 nla_put_string(msg, IFLA_IFNAME, name);
4238
4239 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
4240 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
4241 if (!ea) {
4242 ret = -EINVAL;
4243 goto failure;
4244 }
4245
4246 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
4247 }
4248
4249 if ((cur = tb[TUNNEL_ATTR_MTU])) {
4250 uint32_t mtu = blobmsg_get_u32(cur);
4251 nla_put_u32(msg, IFLA_MTU, mtu);
4252 }
4253
4254 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
4255 ret = -ENOMEM;
4256 goto failure;
4257 }
4258
4259 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
4260
4261 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
4262 ret = -ENOMEM;
4263 goto failure;
4264 }
4265
4266 if (link)
4267 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
4268
4269 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4270 uint32_t id = blobmsg_get_u32(cur);
4271 if (id >= (1u << 24) - 1) {
4272 ret = -EINVAL;
4273 goto failure;
4274 }
4275
4276 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4277 }
4278
4279 if (v6) {
4280 struct in6_addr in6buf;
4281 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4282 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4283 ret = -EINVAL;
4284 goto failure;
4285 }
4286 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4287 }
4288
4289 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4290 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4291 ret = -EINVAL;
4292 goto failure;
4293 }
4294 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4295 }
4296 } else {
4297 struct in_addr inbuf;
4298
4299 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4300 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4301 ret = -EINVAL;
4302 goto failure;
4303 }
4304 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4305 }
4306
4307 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4308 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4309 ret = -EINVAL;
4310 goto failure;
4311 }
4312 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4313 }
4314 }
4315
4316 uint32_t port = 4789;
4317 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4318 port = blobmsg_get_u32(cur);
4319 if (port < 1 || port > 65535) {
4320 ret = -EINVAL;
4321 goto failure;
4322 }
4323 }
4324 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4325
4326 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4327 struct ifla_vxlan_port_range srcports = {0,0};
4328
4329 uint32_t low = blobmsg_get_u32(cur);
4330 if (low < 1 || low > 65535 - 1) {
4331 ret = -EINVAL;
4332 goto failure;
4333 }
4334
4335 srcports.low = htons((uint16_t) low);
4336 srcports.high = htons((uint16_t) (low+1));
4337
4338 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4339 uint32_t high = blobmsg_get_u32(cur);
4340 if (high < 1 || high > 65535) {
4341 ret = -EINVAL;
4342 goto failure;
4343 }
4344
4345 if (high > low)
4346 srcports.high = htons((uint16_t) high);
4347 }
4348
4349 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4350 }
4351
4352 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4353 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4354 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4355 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4356 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4357 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4358 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4359 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4360 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4361
4362 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4363 uint32_t ageing = blobmsg_get_u32(cur);
4364 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4365 }
4366
4367 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4368 uint32_t maxaddress = blobmsg_get_u32(cur);
4369 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4370 }
4371
4372 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4373 char *str = blobmsg_get_string(cur);
4374 unsigned tos = 1;
4375
4376 if (strcmp(str, "inherit")) {
4377 if (!system_tos_aton(str, &tos)) {
4378 ret = -EINVAL;
4379 goto failure;
4380 }
4381 }
4382
4383 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4384 }
4385
4386 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4387 uint32_t ttl = blobmsg_get_u32(cur);
4388 if (ttl < 1 || ttl > 255) {
4389 ret = -EINVAL;
4390 goto failure;
4391 }
4392
4393 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4394 }
4395
4396 nla_nest_end(msg, data);
4397 nla_nest_end(msg, linkinfo);
4398
4399 ret = system_rtnl_call(msg);
4400 if (ret)
4401 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
4402
4403 return ret;
4404
4405 failure:
4406 nlmsg_free(msg);
4407 return ret;
4408 }
4409 #endif
4410
4411 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4412 {
4413 struct blob_attr *cur;
4414 int ret = 0;
4415
4416 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4417 return -1;
4418
4419 #ifdef SIOCADD6RD
4420 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4421 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4422 unsigned int mask;
4423 struct ip_tunnel_6rd p6;
4424
4425 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4426 blobmsg_data(cur), blobmsg_len(cur));
4427
4428 memset(&p6, 0, sizeof(p6));
4429
4430 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4431 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4432 &p6.prefix, &mask) || mask > 128) {
4433 ret = -EINVAL;
4434 goto failure;
4435 }
4436
4437 p6.prefixlen = mask;
4438 }
4439
4440 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4441 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4442 &p6.relay_prefix, &mask) || mask > 32) {
4443 ret = -EINVAL;
4444 goto failure;
4445 }
4446
4447 p6.relay_prefixlen = mask;
4448 }
4449
4450 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4451 ret = -1;
4452 goto failure;
4453 }
4454 }
4455 #endif
4456
4457 return ret;
4458
4459 failure:
4460 system_link_del(name);
4461 return ret;
4462 }
4463
4464 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4465 {
4466 struct blob_attr *cur;
4467 bool set_df = true;
4468 struct ip_tunnel_parm p = {
4469 .link = link,
4470 .iph = {
4471 .version = 4,
4472 .ihl = 5,
4473 .protocol = proto,
4474 }
4475 };
4476
4477 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4478 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4479 return -EINVAL;
4480
4481 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4482 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4483 return -EINVAL;
4484
4485 if ((cur = tb[TUNNEL_ATTR_DF]))
4486 set_df = blobmsg_get_bool(cur);
4487
4488 if ((cur = tb[TUNNEL_ATTR_TTL]))
4489 p.iph.ttl = blobmsg_get_u32(cur);
4490
4491 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4492 char *str = blobmsg_get_string(cur);
4493 if (strcmp(str, "inherit")) {
4494 unsigned uval;
4495
4496 if (!system_tos_aton(str, &uval))
4497 return -EINVAL;
4498
4499 p.iph.tos = uval;
4500 } else
4501 p.iph.tos = 1;
4502 }
4503
4504 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4505 /* ttl !=0 and nopmtudisc are incompatible */
4506 if (p.iph.ttl && p.iph.frag_off == 0)
4507 return -EINVAL;
4508
4509 strncpy(p.name, name, sizeof(p.name) - 1);
4510
4511 switch (p.iph.protocol) {
4512 case IPPROTO_IPIP:
4513 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4514 case IPPROTO_IPV6:
4515 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4516 default:
4517 break;
4518 }
4519 return -1;
4520 }
4521
4522 int system_del_ip_tunnel(const struct device *dev)
4523 {
4524 return system_link_del(dev->ifname);
4525 }
4526
4527 int system_update_ipv6_mtu(struct device *dev, int mtu)
4528 {
4529 int ret = -1;
4530 char buf[64];
4531 int fd;
4532
4533 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4534 if (fd < 0)
4535 return ret;
4536
4537 if (!mtu) {
4538 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4539 if (len < 0)
4540 goto out;
4541
4542 buf[len] = 0;
4543 ret = atoi(buf);
4544 } else {
4545 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4546 ret = mtu;
4547 }
4548
4549 out:
4550 close(fd);
4551 return ret;
4552 }
4553
4554 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4555 {
4556 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4557 struct blob_attr *cur;
4558 const char *str;
4559
4560 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4561 blob_data(attr), blob_len(attr));
4562
4563 system_link_del(dev->ifname);
4564
4565 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4566 return -EINVAL;
4567 str = blobmsg_data(cur);
4568
4569 unsigned int ttl = 0;
4570 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4571 ttl = blobmsg_get_u32(cur);
4572 if (ttl > 255)
4573 return -EINVAL;
4574 }
4575
4576 unsigned int link = 0;
4577 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4578 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4579 if (!iface)
4580 return -EINVAL;
4581
4582 if (iface->l3_dev.dev)
4583 link = iface->l3_dev.dev->ifindex;
4584 }
4585
4586 if (!strcmp(str, "sit"))
4587 return system_add_sit_tunnel(dev->ifname, link, tb);
4588 #ifdef IFLA_IPTUN_MAX
4589 else if (!strcmp(str, "ipip6")) {
4590 return system_add_ip6_tunnel(dev->ifname, link, tb);
4591 } else if (!strcmp(str, "greip")) {
4592 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4593 } else if (!strcmp(str, "gretapip")) {
4594 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4595 } else if (!strcmp(str, "greip6")) {
4596 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4597 } else if (!strcmp(str, "gretapip6")) {
4598 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4599 #ifdef IFLA_VTI_MAX
4600 } else if (!strcmp(str, "vtiip")) {
4601 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4602 } else if (!strcmp(str, "vtiip6")) {
4603 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4604 #endif
4605 #ifdef IFLA_XFRM_MAX
4606 } else if (!strcmp(str, "xfrm")) {
4607 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4608 #endif
4609 #ifdef IFLA_VXLAN_MAX
4610 } else if(!strcmp(str, "vxlan")) {
4611 return system_add_vxlan(dev->ifname, link, tb, false);
4612 } else if(!strcmp(str, "vxlan6")) {
4613 return system_add_vxlan(dev->ifname, link, tb, true);
4614 #endif
4615 #endif
4616 } else if (!strcmp(str, "ipip")) {
4617 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4618 }
4619 else
4620 return -EINVAL;
4621
4622 return 0;
4623 }
OpenWrt Network interface configuration daemon