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bridge: rework config change pvid handling
[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 void
207 nl_udebug_cb(void *priv, struct nl_msg *msg)
208 {
209 struct nlmsghdr *nlh = nlmsg_hdr(msg);
210
211 udebug_netlink_msg(priv, nlmsg_get_proto(msg), nlh, nlh->nlmsg_len);
212 }
213
214 static struct nl_sock *
215 create_socket(int protocol, int groups)
216 {
217 struct nl_sock *sock;
218
219 sock = nl_socket_alloc();
220 if (!sock)
221 return NULL;
222
223 if (groups)
224 nl_join_groups(sock, groups);
225
226 if (nl_connect(sock, protocol)) {
227 nl_socket_free(sock);
228 return NULL;
229 }
230
231 nl_socket_set_tx_debug_cb(sock, nl_udebug_cb, &udb_nl);
232 nl_socket_set_rx_debug_cb(sock, nl_udebug_cb, &udb_nl);
233
234 return sock;
235 }
236
237 static bool
238 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
239 uloop_fd_handler cb, int flags)
240 {
241 ev->sock = create_socket(protocol, groups);
242 if (!ev->sock)
243 return false;
244
245 ev->uloop.fd = nl_socket_get_fd(ev->sock);
246 ev->uloop.cb = cb;
247 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
248 return false;
249
250 return true;
251 }
252
253 static bool
254 create_event_socket(struct event_socket *ev, int protocol,
255 int (*cb)(struct nl_msg *msg, void *arg))
256 {
257 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
258 return false;
259
260 /* Install the valid custom callback handler */
261 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
262
263 /* Disable sequence number checking on event sockets */
264 nl_socket_disable_seq_check(ev->sock);
265
266 /* Increase rx buffer size to 65K on event sockets */
267 ev->bufsize = 65535;
268 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
269 return false;
270
271 return true;
272 }
273
274 static bool
275 create_hotplug_event_socket(struct event_socket *ev, int protocol,
276 void (*cb)(struct uloop_fd *u, unsigned int events))
277 {
278 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
279 return false;
280
281 /* Increase rx buffer size to 65K on event sockets */
282 ev->bufsize = 65535;
283 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
284 return false;
285
286 return true;
287 }
288
289 static bool
290 system_rtn_aton(const char *src, unsigned int *dst)
291 {
292 char *e;
293 unsigned int n;
294
295 if (!strcmp(src, "local"))
296 n = RTN_LOCAL;
297 else if (!strcmp(src, "nat"))
298 n = RTN_NAT;
299 else if (!strcmp(src, "broadcast"))
300 n = RTN_BROADCAST;
301 else if (!strcmp(src, "anycast"))
302 n = RTN_ANYCAST;
303 else if (!strcmp(src, "multicast"))
304 n = RTN_MULTICAST;
305 else if (!strcmp(src, "prohibit"))
306 n = RTN_PROHIBIT;
307 else if (!strcmp(src, "unreachable"))
308 n = RTN_UNREACHABLE;
309 else if (!strcmp(src, "blackhole"))
310 n = RTN_BLACKHOLE;
311 else if (!strcmp(src, "xresolve"))
312 n = RTN_XRESOLVE;
313 else if (!strcmp(src, "unicast"))
314 n = RTN_UNICAST;
315 else if (!strcmp(src, "throw"))
316 n = RTN_THROW;
317 else if (!strcmp(src, "failed_policy"))
318 n = RTN_FAILED_POLICY;
319 else {
320 n = strtoul(src, &e, 0);
321 if (!e || *e || e == src || n > 255)
322 return false;
323 }
324
325 *dst = n;
326 return true;
327 }
328
329 static bool
330 system_tos_aton(const char *src, unsigned *dst)
331 {
332 char *e;
333
334 *dst = strtoul(src, &e, 16);
335 if (e == src || *e || *dst > 255)
336 return false;
337
338 return true;
339 }
340
341 int system_init(void)
342 {
343 static struct event_socket rtnl_event;
344 static struct event_socket hotplug_event;
345
346 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
347 system_fd_set_cloexec(sock_ioctl);
348
349 /* Prepare socket for routing / address control */
350 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
351 if (!sock_rtnl)
352 return -1;
353
354 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
355 return -1;
356
357 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
358 handle_hotplug_event))
359 return -1;
360
361 /* Receive network link events form kernel */
362 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
363
364 return 0;
365 }
366
367 static void write_file(const char *path, const char *val)
368 {
369 int fd;
370
371 fd = open(path, O_WRONLY);
372 if (fd < 0)
373 return;
374
375 if (write(fd, val, strlen(val))) {}
376 close(fd);
377 }
378
379 static int read_file(const char *path, char *buf, const size_t buf_sz)
380 {
381 int fd = -1, ret = -1;
382
383 fd = open(path, O_RDONLY);
384 if (fd < 0)
385 goto out;
386
387 ssize_t len = read(fd, buf, buf_sz - 1);
388 if (len < 0)
389 goto out;
390
391 ret = buf[len] = 0;
392
393 out:
394 if (fd >= 0)
395 close(fd);
396
397 return ret;
398 }
399
400
401 static const char *
402 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
403 {
404 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
405
406 return dev_buf;
407 }
408
409 static const char *
410 dev_sysfs_path(const char *ifname, const char *file)
411 {
412 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
413
414 return dev_buf;
415 }
416
417 static void
418 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
419 const char *val)
420 {
421 write_file(dev_sysctl_path(prefix, ifname, file), val);
422 }
423
424 static int
425 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
426 char *buf, size_t buf_sz)
427 {
428 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
429 }
430
431 static void
432 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
433 {
434 if (!val)
435 return;
436
437 write_file(dev_sysfs_path(ifname, file), val);
438 }
439
440 static void
441 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
442 {
443 char buf[16];
444
445 snprintf(buf, sizeof(buf), "%d", val);
446 system_set_dev_sysfs(file, ifname, buf);
447 }
448
449 static int
450 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
451 {
452 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
453 }
454
455 static void system_set_disable_ipv6(struct device *dev, const char *val)
456 {
457 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
458 }
459
460 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
461 {
462 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
463 }
464
465 static void system_set_rpfilter(struct device *dev, const char *val)
466 {
467 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
468 }
469
470 static void system_set_acceptlocal(struct device *dev, const char *val)
471 {
472 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
473 }
474
475 static void system_set_igmpversion(struct device *dev, const char *val)
476 {
477 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
478 }
479
480 static void system_set_mldversion(struct device *dev, const char *val)
481 {
482 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
483 }
484
485 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
486 {
487 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
488 }
489
490 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
491 {
492 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
493 }
494
495 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
496 {
497 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
498 }
499
500 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
501 {
502 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
503 }
504
505 static void system_set_neigh4locktime(struct device *dev, const char *val)
506 {
507 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
508 }
509
510 static void system_set_dadtransmits(struct device *dev, const char *val)
511 {
512 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
513 }
514
515 static void system_set_sendredirects(struct device *dev, const char *val)
516 {
517 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
518 }
519
520 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
521 {
522 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
523 }
524
525 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
526 {
527 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
528 }
529
530 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
531 {
532 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
533 }
534
535 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
536 {
537 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
538 }
539
540 static void system_set_arp_accept(struct device *dev, const char *val)
541 {
542 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
543 }
544
545 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
546 {
547 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
548 }
549
550 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
551 {
552 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
553 }
554
555 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
556 {
557 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
558 }
559
560 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
561 {
562 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
563 }
564
565 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
566 {
567 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
568 }
569
570 static void system_bridge_set_isolated(struct device *dev, const char *val)
571 {
572 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
573 }
574
575 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
576 {
577 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
578 }
579
580 void system_bridge_set_stp_state(struct device *dev, bool val)
581 {
582 const char *valstr = val ? "1" : "0";
583
584 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
585 }
586
587 static void system_bridge_set_learning(struct device *dev, const char *val)
588 {
589 system_set_dev_sysfs("brport/learning", dev->ifname, val);
590 }
591
592 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
593 {
594 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
595 }
596
597 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
598 {
599 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
600 dev->ifname, buf, buf_sz);
601 }
602
603 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
604 {
605 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
606 dev->ifname, buf, buf_sz);
607 }
608
609 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
610 {
611 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
612 dev->ifname, buf, buf_sz);
613 }
614
615 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
616 {
617 return system_get_dev_sysctl("ipv4/conf", "accept_local",
618 dev->ifname, buf, buf_sz);
619 }
620
621 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
622 {
623 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
624 dev->ifname, buf, buf_sz);
625 }
626
627 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
628 {
629 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
630 dev->ifname, buf, buf_sz);
631 }
632
633 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
634 {
635 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
636 dev->ifname, buf, buf_sz);
637 }
638
639 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
640 {
641 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
642 dev->ifname, buf, buf_sz);
643 }
644
645 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
646 {
647 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
648 dev->ifname, buf, buf_sz);
649 }
650
651 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
652 {
653 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
654 dev->ifname, buf, buf_sz);
655 }
656
657 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
658 {
659 return system_get_dev_sysctl("ipv4/neigh", "locktime",
660 dev->ifname, buf, buf_sz);
661 }
662
663 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
664 {
665 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
666 dev->ifname, buf, buf_sz);
667 }
668
669 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
670 {
671 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
672 dev->ifname, buf, buf_sz);
673 }
674
675
676 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
677 {
678 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
679 dev->ifname, buf, buf_sz);
680 }
681
682 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
683 {
684 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
685 dev->ifname, buf, buf_sz);
686 }
687
688 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
689 {
690 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
691 dev->ifname, buf, buf_sz);
692 }
693
694 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
695 {
696 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
697 dev->ifname, buf, buf_sz);
698 }
699
700 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
701 {
702 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
703 dev->ifname, buf, buf_sz);
704 }
705
706 #ifndef IFF_LOWER_UP
707 #define IFF_LOWER_UP 0x10000
708 #endif
709
710 static void
711 system_device_update_state(struct device *dev, unsigned int flags, unsigned int ifindex)
712 {
713 if (dev->type == &simple_device_type) {
714 if (dev->external)
715 device_set_disabled(dev, !(flags & IFF_UP));
716
717 device_set_present(dev, ifindex > 0);
718 }
719 device_set_link(dev, flags & IFF_LOWER_UP ? true : false);
720 }
721
722 /* Evaluate netlink messages */
723 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
724 {
725 struct nlmsghdr *nh = nlmsg_hdr(msg);
726 struct ifinfomsg *ifi = NLMSG_DATA(nh);
727 struct nlattr *nla[__IFLA_MAX];
728 struct device *dev;
729
730 if (nh->nlmsg_type != RTM_NEWLINK)
731 return 0;
732
733 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
734 if (!nla[IFLA_IFNAME])
735 return 0;
736
737 dev = device_find(nla_data(nla[IFLA_IFNAME]));
738 if (!dev)
739 return 0;
740
741 system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index);
742 return 0;
743 }
744
745 static void
746 handle_hotplug_msg(char *data, int size)
747 {
748 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
749 char *cur, *end, *sep;
750 int skip;
751 bool add;
752
753 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
754 add = true;
755 else if (!strncmp(data, "remove@", 7))
756 add = false;
757 else
758 return;
759
760 skip = strlen(data) + 1;
761 end = data + size;
762
763 for (cur = data + skip; cur < end; cur += skip) {
764 skip = strlen(cur) + 1;
765
766 sep = strchr(cur, '=');
767 if (!sep)
768 continue;
769
770 *sep = 0;
771 if (!strcmp(cur, "INTERFACE"))
772 interface = sep + 1;
773 else if (!strcmp(cur, "SUBSYSTEM")) {
774 subsystem = sep + 1;
775 if (strcmp(subsystem, "net") != 0)
776 return;
777 } else if (!strcmp(cur, "DEVPATH_OLD")) {
778 interface_old = strrchr(sep + 1, '/');
779 if (interface_old)
780 interface_old++;
781 }
782 }
783
784 if (!subsystem || !interface)
785 return;
786
787 if (interface_old)
788 device_hotplug_event(interface_old, false);
789
790 device_hotplug_event(interface, add);
791 }
792
793 static void
794 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
795 {
796 struct event_socket *ev = container_of(u, struct event_socket, uloop);
797 struct sockaddr_nl nla;
798 unsigned char *buf = NULL;
799 int size;
800 int err;
801 socklen_t errlen = sizeof(err);
802
803 if (!u->error) {
804 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
805 if (nla.nl_pid == 0)
806 handle_hotplug_msg((char *) buf, size);
807
808 free(buf);
809 }
810 return;
811 }
812
813 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
814 goto abort;
815
816 switch(err) {
817 case ENOBUFS:
818 /* Increase rx buffer size on netlink socket */
819 ev->bufsize *= 2;
820 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
821 goto abort;
822 break;
823
824 default:
825 goto abort;
826 }
827 u->error = false;
828 return;
829
830 abort:
831 uloop_fd_delete(&ev->uloop);
832 return;
833 }
834
835 static int system_rtnl_call(struct nl_msg *msg)
836 {
837 int ret;
838
839 ret = nl_send_auto_complete(sock_rtnl, msg);
840 nlmsg_free(msg);
841
842 if (ret < 0)
843 return ret;
844
845 return nl_wait_for_ack(sock_rtnl);
846 }
847
848 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
849 {
850 struct nl_msg *msg;
851 struct ifinfomsg iim = {
852 .ifi_family = af,
853 .ifi_index = index,
854 };
855
856 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
857 if (!msg)
858 return NULL;
859
860 nlmsg_append(msg, &iim, sizeof(iim), 0);
861 if (ifname)
862 nla_put_string(msg, IFLA_IFNAME, ifname);
863
864 return msg;
865 }
866
867 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
868 {
869 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
870 }
871
872 static int system_link_del(const char *ifname)
873 {
874 struct nl_msg *msg;
875
876 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
877 if (!msg)
878 return -1;
879
880 return system_rtnl_call(msg);
881 }
882
883 int system_bridge_delbr(struct device *bridge)
884 {
885 return system_link_del(bridge->ifname);
886 }
887
888 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
889 {
890 struct ifreq ifr;
891
892 memset(&ifr, 0, sizeof(ifr));
893 if (dev)
894 ifr.ifr_ifindex = dev->ifindex;
895 else
896 ifr.ifr_data = data;
897 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
898 return ioctl(sock_ioctl, cmd, &ifr);
899 }
900
901 static bool system_is_bridge(const char *name)
902 {
903 struct stat st;
904
905 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
906 }
907
908 static char *system_get_bridge(const char *name, char *buf, int buflen)
909 {
910 char *path;
911 ssize_t len = -1;
912 glob_t gl;
913
914 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
915 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
916 return NULL;
917
918 if (gl.gl_pathc > 0)
919 len = readlink(gl.gl_pathv[0], buf, buflen);
920
921 globfree(&gl);
922
923 if (len < 0)
924 return NULL;
925
926 buf[len] = 0;
927 path = strrchr(buf, '/');
928 if (!path)
929 return NULL;
930
931 return path + 1;
932 }
933
934 static void
935 system_bridge_set_wireless(struct device *bridge, struct device *dev)
936 {
937 bool mcast_to_ucast = dev->wireless_ap;
938 bool hairpin;
939
940 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
941 mcast_to_ucast = dev->settings.multicast_to_unicast;
942 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
943 !bridge->settings.multicast_to_unicast)
944 mcast_to_ucast = false;
945
946 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
947 if (dev->wireless_isolate)
948 hairpin = false;
949
950 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
951 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
952 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
953 }
954
955 int system_bridge_addif(struct device *bridge, struct device *dev)
956 {
957 char buf[64];
958 char *oldbr;
959 int tries = 0;
960 int ret;
961
962
963 for (tries = 0; tries < 3; tries++) {
964 ret = 0;
965 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
966 if (oldbr && !strcmp(oldbr, bridge->ifname))
967 break;
968
969 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
970 if (!ret)
971 break;
972
973 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s",
974 dev->ifname, bridge->ifname, tries, strerror(errno));
975 }
976
977 if (dev->wireless)
978 system_bridge_set_wireless(bridge, dev);
979
980 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
981 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
982 system_bridge_set_multicast_router(dev, buf);
983 }
984
985 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
986 dev->settings.multicast_fast_leave)
987 system_bridge_set_multicast_fast_leave(dev, "1");
988
989 if (dev->settings.flags & DEV_OPT_LEARNING &&
990 !dev->settings.learning)
991 system_bridge_set_learning(dev, "0");
992
993 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
994 !dev->settings.unicast_flood)
995 system_bridge_set_unicast_flood(dev, "0");
996
997 if (dev->settings.flags & DEV_OPT_ISOLATE &&
998 dev->settings.isolate)
999 system_bridge_set_isolated(dev, "1");
1000
1001 if (dev->bpdu_filter)
1002 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
1003
1004 return ret;
1005 }
1006
1007 int system_bridge_delif(struct device *bridge, struct device *dev)
1008 {
1009 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
1010 }
1011
1012 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
1013 {
1014 struct bridge_vlan_info vinfo = { .vid = vid, };
1015 unsigned short flags = 0;
1016 struct nlattr *afspec;
1017 struct nl_msg *nlm;
1018 int index;
1019 int ret = 0;
1020
1021 index = if_nametoindex(iface);
1022 if (!index)
1023 return -1;
1024
1025 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1026 if (!nlm)
1027 return -1;
1028
1029 if (vflags & BRVLAN_F_SELF)
1030 flags |= BRIDGE_FLAGS_SELF;
1031
1032 if (vflags & BRVLAN_F_PVID)
1033 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1034
1035 if (vflags & BRVLAN_F_UNTAGGED)
1036 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1037
1038 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1039 if (!afspec) {
1040 ret = -ENOMEM;
1041 goto failure;
1042 }
1043
1044 if (flags)
1045 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1046
1047 if (vid_end > vid)
1048 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1049
1050 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1051
1052 if (vid_end > vid) {
1053 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1054 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1055 vinfo.vid = vid_end;
1056 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1057 }
1058
1059 nla_nest_end(nlm, afspec);
1060
1061 return system_rtnl_call(nlm);
1062
1063 failure:
1064 nlmsg_free(nlm);
1065 return ret;
1066 }
1067
1068 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1069 {
1070 const char *ifname = dev->ifname;
1071 struct blob_attr *cur;
1072 char op = cfg ? '+' : '-';
1073 char buf[64];
1074 size_t rem;
1075
1076 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1077 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1078 write_file(dev_buf, buf);
1079
1080 if (!cfg)
1081 return 0;
1082
1083 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1084
1085 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1086
1087 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1088 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1089 cfg->policy == BONDING_MODE_8023AD)
1090 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1091
1092 if (cfg->policy == BONDING_MODE_8023AD) {
1093 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1094 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1095 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1096 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1097 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1098 }
1099
1100 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1101 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1102
1103 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1104 cfg->policy == BONDING_MODE_BALANCE_ALB)
1105 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1106
1107 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1108 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1109 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1110 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1111 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1112 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1113
1114 system_set_dev_sysfs_int((cfg->monitor_arp ?
1115 "bonding/arp_interval" :
1116 "bonding/miimon"), ifname, cfg->monitor_interval);
1117
1118 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1119 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1120 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1121 }
1122
1123 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1124 if (cfg->policy < BONDING_MODE_8023AD)
1125 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1126 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1127 if (!cfg->monitor_arp && cfg->monitor_interval) {
1128 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1129 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1130 }
1131
1132 return 0;
1133 }
1134
1135 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1136 {
1137 const char *port_name = port->ifname;
1138 const char op_ch = add ? '+' : '-';
1139 char buf[IFNAMSIZ + 1];
1140
1141 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1142 system_if_down(port);
1143 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1144 system_if_up(port);
1145
1146 if (primary)
1147 system_set_dev_sysfs("bonding/primary", dev->ifname,
1148 add ? port_name : "");
1149
1150 return 0;
1151 }
1152
1153 int system_if_resolve(struct device *dev)
1154 {
1155 struct ifreq ifr;
1156
1157 memset(&ifr, 0, sizeof(ifr));
1158 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1159 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1160 return ifr.ifr_ifindex;
1161 else
1162 return 0;
1163 }
1164
1165 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1166 {
1167 struct ifreq ifr;
1168
1169 memset(&ifr, 0, sizeof(ifr));
1170 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1171 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1172 return -1;
1173
1174 ifr.ifr_flags |= add;
1175 ifr.ifr_flags &= ~rem;
1176 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1177 }
1178
1179 struct clear_data {
1180 struct nl_msg *msg;
1181 struct device *dev;
1182 int type;
1183 int size;
1184 int af;
1185 };
1186
1187
1188 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1189 {
1190 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1191
1192 return (long)ifa->ifa_index == ifindex;
1193 }
1194
1195 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1196 {
1197 struct rtmsg *r = NLMSG_DATA(hdr);
1198 struct nlattr *tb[__RTA_MAX];
1199
1200 if (r->rtm_protocol == RTPROT_KERNEL &&
1201 r->rtm_family == AF_INET6)
1202 return false;
1203
1204 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1205 if (!tb[RTA_OIF])
1206 return false;
1207
1208 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1209 }
1210
1211 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1212 {
1213 return true;
1214 }
1215
1216 static int cb_clear_event(struct nl_msg *msg, void *arg)
1217 {
1218 struct clear_data *clr = arg;
1219 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1220 bool (*cb)(struct nlmsghdr *, int ifindex);
1221 int type, ret;
1222
1223 switch(clr->type) {
1224 case RTM_GETADDR:
1225 type = RTM_DELADDR;
1226 if (hdr->nlmsg_type != RTM_NEWADDR)
1227 return NL_SKIP;
1228
1229 cb = check_ifaddr;
1230 break;
1231 case RTM_GETROUTE:
1232 type = RTM_DELROUTE;
1233 if (hdr->nlmsg_type != RTM_NEWROUTE)
1234 return NL_SKIP;
1235
1236 cb = check_route;
1237 break;
1238 case RTM_GETRULE:
1239 type = RTM_DELRULE;
1240 if (hdr->nlmsg_type != RTM_NEWRULE)
1241 return NL_SKIP;
1242
1243 cb = check_rule;
1244 break;
1245 default:
1246 return NL_SKIP;
1247 }
1248
1249 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1250 return NL_SKIP;
1251
1252 if (type == RTM_DELRULE)
1253 D(SYSTEM, "Remove a rule");
1254 else
1255 D(SYSTEM, "Remove %s from device %s",
1256 type == RTM_DELADDR ? "an address" : "a route",
1257 clr->dev->ifname);
1258
1259 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1260 hdr = nlmsg_hdr(clr->msg);
1261 hdr->nlmsg_type = type;
1262 hdr->nlmsg_flags = NLM_F_REQUEST;
1263
1264 nl_socket_disable_auto_ack(sock_rtnl);
1265 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1266 if (ret < 0) {
1267 if (type == RTM_DELRULE)
1268 D(SYSTEM, "Error deleting a rule: %d", ret);
1269 else
1270 D(SYSTEM, "Error deleting %s from device '%s': %d",
1271 type == RTM_DELADDR ? "an address" : "a route",
1272 clr->dev->ifname, ret);
1273 }
1274
1275 nl_socket_enable_auto_ack(sock_rtnl);
1276
1277 return NL_SKIP;
1278 }
1279
1280 static int
1281 cb_finish_event(struct nl_msg *msg, void *arg)
1282 {
1283 int *pending = arg;
1284 *pending = 0;
1285 return NL_STOP;
1286 }
1287
1288 static int
1289 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1290 {
1291 int *pending = arg;
1292 *pending = err->error;
1293 return NL_STOP;
1294 }
1295
1296 static void
1297 system_if_clear_entries(struct device *dev, int type, int af)
1298 {
1299 struct clear_data clr;
1300 struct nl_cb *cb;
1301 struct rtmsg rtm = {
1302 .rtm_family = af,
1303 .rtm_flags = RTM_F_CLONED,
1304 };
1305 int flags = NLM_F_DUMP;
1306 int pending = 1;
1307
1308 clr.af = af;
1309 clr.dev = dev;
1310 clr.type = type;
1311 switch (type) {
1312 case RTM_GETADDR:
1313 case RTM_GETRULE:
1314 clr.size = sizeof(struct rtgenmsg);
1315 break;
1316 case RTM_GETROUTE:
1317 clr.size = sizeof(struct rtmsg);
1318 break;
1319 default:
1320 return;
1321 }
1322
1323 cb = nl_cb_alloc(NL_CB_DEFAULT);
1324 if (!cb)
1325 return;
1326
1327 clr.msg = nlmsg_alloc_simple(type, flags);
1328 if (!clr.msg)
1329 goto out;
1330
1331 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1332 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1333 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1334 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1335
1336 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1337 goto free;
1338
1339 while (pending > 0)
1340 nl_recvmsgs(sock_rtnl, cb);
1341
1342 free:
1343 nlmsg_free(clr.msg);
1344 out:
1345 nl_cb_put(cb);
1346 }
1347
1348 /*
1349 * Clear bridge (membership) state and bring down device
1350 */
1351 void system_if_clear_state(struct device *dev)
1352 {
1353 static char buf[256];
1354 char *bridge;
1355 device_set_ifindex(dev, system_if_resolve(dev));
1356
1357 if (dev->external || !dev->ifindex)
1358 return;
1359
1360 system_if_flags(dev->ifname, 0, IFF_UP);
1361
1362 if (system_is_bridge(dev->ifname)) {
1363 D(SYSTEM, "Delete existing bridge named '%s'", dev->ifname);
1364 system_bridge_delbr(dev);
1365 return;
1366 }
1367
1368 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1369 if (bridge) {
1370 D(SYSTEM, "Remove device '%s' from bridge '%s'", dev->ifname, bridge);
1371 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1372 }
1373
1374 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1375 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1376 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1377 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1378 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1379 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1380 system_set_disable_ipv6(dev, "0");
1381 }
1382
1383 static inline unsigned long
1384 sec_to_jiffies(int val)
1385 {
1386 return (unsigned long) val * 100;
1387 }
1388
1389 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1390 {
1391 struct nlattr *linkinfo, *data;
1392 struct nl_msg *msg;
1393 uint64_t val;
1394 int rv;
1395
1396 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1397 if (!msg)
1398 return -1;
1399
1400 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1401 goto nla_put_failure;
1402
1403 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1404
1405 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1406 goto nla_put_failure;
1407
1408 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1409 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1410 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1411 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1412 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1413
1414 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1415 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1416
1417 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1418 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1419 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1420 }
1421
1422 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1423 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1424
1425 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1426 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1427
1428 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1429 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1430
1431 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1432 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1433 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1434 val = cfg->robustness * cfg->query_interval +
1435 cfg->query_response_interval;
1436
1437 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1438
1439 val -= cfg->query_response_interval / 2;
1440
1441 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1442 }
1443
1444 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1445 val = cfg->query_interval / 4;
1446
1447 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1448 }
1449
1450 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1451 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1452 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1453 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1454
1455 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1456 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1457
1458 nla_nest_end(msg, data);
1459 nla_nest_end(msg, linkinfo);
1460
1461 rv = system_rtnl_call(msg);
1462 if (rv)
1463 D(SYSTEM, "Error adding bridge '%s': %d", bridge->ifname, rv);
1464
1465 return rv;
1466
1467 nla_put_failure:
1468 nlmsg_free(msg);
1469 return -ENOMEM;
1470 }
1471
1472 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1473 {
1474 struct nl_msg *msg;
1475 struct nlattr *linkinfo, *data;
1476 size_t i;
1477 int rv;
1478 static const struct {
1479 const char *name;
1480 enum macvlan_mode val;
1481 } modes[] = {
1482 { "private", MACVLAN_MODE_PRIVATE },
1483 { "vepa", MACVLAN_MODE_VEPA },
1484 { "bridge", MACVLAN_MODE_BRIDGE },
1485 { "passthru", MACVLAN_MODE_PASSTHRU },
1486 };
1487
1488 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1489 if (!msg)
1490 return -1;
1491
1492 if (cfg->flags & MACVLAN_OPT_MACADDR)
1493 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1494 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1495
1496 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1497 goto nla_put_failure;
1498
1499 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1500
1501 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1502 goto nla_put_failure;
1503
1504 if (cfg->mode) {
1505 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1506 if (strcmp(cfg->mode, modes[i].name) != 0)
1507 continue;
1508
1509 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1510 break;
1511 }
1512 }
1513
1514 nla_nest_end(msg, data);
1515 nla_nest_end(msg, linkinfo);
1516
1517 rv = system_rtnl_call(msg);
1518 if (rv)
1519 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d", macvlan->ifname, dev->ifname, rv);
1520
1521 return rv;
1522
1523 nla_put_failure:
1524 nlmsg_free(msg);
1525 return -ENOMEM;
1526 }
1527
1528 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1529 {
1530 struct nl_msg *msg;
1531 int index;
1532
1533 if (!dev)
1534 return -1;
1535
1536 index = system_if_resolve(dev);
1537 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1538 if (!msg)
1539 return -1;
1540
1541 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1542 return system_rtnl_call(msg);
1543 }
1544
1545 int system_macvlan_del(struct device *macvlan)
1546 {
1547 return system_link_del(macvlan->ifname);
1548 }
1549
1550 int system_netns_open(const pid_t target_ns)
1551 {
1552 char pid_net_path[PATH_MAX];
1553
1554 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1555
1556 return open(pid_net_path, O_RDONLY);
1557 }
1558
1559 int system_netns_set(int netns_fd)
1560 {
1561 return setns(netns_fd, CLONE_NEWNET);
1562 }
1563
1564 int system_veth_add(struct device *veth, struct veth_config *cfg)
1565 {
1566 struct nl_msg *msg;
1567 struct ifinfomsg empty_iim = {0,};
1568 struct nlattr *linkinfo, *data, *veth_info;
1569 int rv;
1570
1571 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1572
1573 if (!msg)
1574 return -1;
1575
1576 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1577
1578 if (cfg->flags & VETH_OPT_MACADDR)
1579 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1580 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1581
1582 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1583 goto nla_put_failure;
1584
1585 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1586
1587 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1588 goto nla_put_failure;
1589
1590 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1591 goto nla_put_failure;
1592
1593 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1594
1595 if (cfg->flags & VETH_OPT_PEER_NAME)
1596 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1597 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1598 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1599
1600 nla_nest_end(msg, veth_info);
1601 nla_nest_end(msg, data);
1602 nla_nest_end(msg, linkinfo);
1603
1604 rv = system_rtnl_call(msg);
1605 if (rv) {
1606 if (cfg->flags & VETH_OPT_PEER_NAME)
1607 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d", veth->ifname, cfg->peer_name, rv);
1608 else
1609 D(SYSTEM, "Error adding veth '%s': %d", veth->ifname, rv);
1610 }
1611
1612 return rv;
1613
1614 nla_put_failure:
1615 nlmsg_free(msg);
1616 return -ENOMEM;
1617 }
1618
1619 int system_veth_del(struct device *veth)
1620 {
1621 return system_link_del(veth->ifname);
1622 }
1623
1624 static int system_vlan(struct device *dev, int id)
1625 {
1626 struct vlan_ioctl_args ifr = {
1627 .cmd = SET_VLAN_NAME_TYPE_CMD,
1628 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1629 };
1630
1631 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1632 return -1;
1633
1634 if (id < 0) {
1635 ifr.cmd = DEL_VLAN_CMD;
1636 ifr.u.VID = 0;
1637 } else {
1638 ifr.cmd = ADD_VLAN_CMD;
1639 ifr.u.VID = id;
1640 }
1641 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1642 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1643 }
1644
1645 int system_vlan_add(struct device *dev, int id)
1646 {
1647 return system_vlan(dev, id);
1648 }
1649
1650 int system_vlan_del(struct device *dev)
1651 {
1652 return system_vlan(dev, -1);
1653 }
1654
1655 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1656 {
1657 struct nl_msg *msg;
1658 struct nlattr *linkinfo, *data, *qos;
1659 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1660 struct vlan_qos_mapping *elem;
1661 struct ifla_vlan_qos_mapping nl_qos_map;
1662 int rv;
1663
1664 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1665
1666 if (!msg)
1667 return -1;
1668
1669 nlmsg_append(msg, &iim, sizeof(iim), 0);
1670 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1671 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1672
1673 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1674 goto nla_put_failure;
1675
1676 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1677
1678 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1679 goto nla_put_failure;
1680
1681 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1682
1683 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1684 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1685 #else
1686 if(cfg->proto == VLAN_PROTO_8021AD)
1687 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);
1688 #endif
1689
1690 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1691 goto nla_put_failure;
1692
1693 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1694 nl_qos_map.from = elem->from;
1695 nl_qos_map.to = elem->to;
1696 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1697 }
1698 nla_nest_end(msg, qos);
1699
1700 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1701 goto nla_put_failure;
1702
1703 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1704 nl_qos_map.from = elem->from;
1705 nl_qos_map.to = elem->to;
1706 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1707 }
1708 nla_nest_end(msg, qos);
1709
1710 nla_nest_end(msg, data);
1711 nla_nest_end(msg, linkinfo);
1712
1713 rv = system_rtnl_call(msg);
1714 if (rv)
1715 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d", vlandev->ifname, dev->ifname, rv);
1716
1717 return rv;
1718
1719 nla_put_failure:
1720 nlmsg_free(msg);
1721 return -ENOMEM;
1722 }
1723
1724 int system_vlandev_del(struct device *vlandev)
1725 {
1726 return system_link_del(vlandev->ifname);
1727 }
1728
1729 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
1730 struct if_get_master_data {
1731 int ifindex;
1732 int master_ifindex;
1733 int pending;
1734 };
1735
1736 static void if_get_master_dsa_linkinfo_attr(struct if_get_master_data *data,
1737 struct rtattr *attr)
1738 {
1739 struct rtattr *cur;
1740 int rem = RTA_PAYLOAD(attr);
1741
1742 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1743 if (cur->rta_type != IFLA_DSA_MASTER)
1744 continue;
1745
1746 data->master_ifindex = *(__u32 *)RTA_DATA(cur);
1747 }
1748 }
1749
1750 static void if_get_master_linkinfo_attr(struct if_get_master_data *data,
1751 struct rtattr *attr)
1752 {
1753 struct rtattr *cur;
1754 int rem = RTA_PAYLOAD(attr);
1755
1756 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1757 if (cur->rta_type != IFLA_INFO_KIND && cur->rta_type != IFLA_INFO_DATA)
1758 continue;
1759
1760 if (cur->rta_type == IFLA_INFO_KIND && strcmp("dsa", (char *)RTA_DATA(cur)))
1761 break;
1762
1763 if (cur->rta_type == IFLA_INFO_DATA)
1764 if_get_master_dsa_linkinfo_attr(data, cur);
1765 }
1766 }
1767
1768 static int cb_if_get_master_valid(struct nl_msg *msg, void *arg)
1769 {
1770 struct nlmsghdr *nh = nlmsg_hdr(msg);
1771 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1772 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1773 struct rtattr *attr;
1774 int rem;
1775
1776 if (nh->nlmsg_type != RTM_NEWLINK)
1777 return NL_SKIP;
1778
1779 if (ifi->ifi_family != AF_UNSPEC)
1780 return NL_SKIP;
1781
1782 if (ifi->ifi_index != data->ifindex)
1783 return NL_SKIP;
1784
1785 attr = IFLA_RTA(ifi);
1786 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1787
1788 while (RTA_OK(attr, rem)) {
1789 if (attr->rta_type == IFLA_LINKINFO)
1790 if_get_master_linkinfo_attr(data, attr);
1791
1792 attr = RTA_NEXT(attr, rem);
1793 }
1794
1795 return NL_OK;
1796 }
1797
1798 static int cb_if_get_master_ack(struct nl_msg *msg, void *arg)
1799 {
1800 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1801 data->pending = 0;
1802 return NL_STOP;
1803 }
1804
1805 static int cb_if_get_master_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1806 {
1807 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1808 data->pending = 0;
1809 return NL_STOP;
1810 }
1811
1812 static int system_if_get_master_ifindex(struct device *dev)
1813 {
1814 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1815 struct nl_msg *msg;
1816 struct ifinfomsg ifi = {
1817 .ifi_family = AF_UNSPEC,
1818 .ifi_index = 0,
1819 };
1820 struct if_get_master_data data = {
1821 .ifindex = if_nametoindex(dev->ifname),
1822 .master_ifindex = -1,
1823 .pending = 1,
1824 };
1825 int ret = -1;
1826
1827 if (!cb)
1828 return ret;
1829
1830 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
1831 if (!msg)
1832 goto out;
1833
1834 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1835 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1836 goto free;
1837
1838 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_get_master_valid, &data);
1839 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_get_master_ack, &data);
1840 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_get_master_error, &data);
1841
1842 ret = nl_send_auto_complete(sock_rtnl, msg);
1843 if (ret < 0)
1844 goto free;
1845
1846 while (data.pending > 0)
1847 nl_recvmsgs(sock_rtnl, cb);
1848
1849 if (data.master_ifindex >= 0)
1850 ret = data.master_ifindex;
1851
1852 free:
1853 nlmsg_free(msg);
1854 out:
1855 nl_cb_put(cb);
1856 return ret;
1857 }
1858
1859 static void system_refresh_orig_macaddr(struct device *dev, struct device_settings *s)
1860 {
1861 struct ifreq ifr;
1862
1863 memset(&ifr, 0, sizeof(ifr));
1864 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1865
1866 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0)
1867 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1868 }
1869
1870 static void system_set_master(struct device *dev, int master_ifindex)
1871 {
1872 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
1873 struct nl_msg *nlm;
1874
1875 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1876 if (!nlm)
1877 return;
1878
1879 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
1880 nla_put_string(nlm, IFLA_IFNAME, dev->ifname);
1881
1882 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
1883 if (!linkinfo)
1884 goto failure;
1885
1886 nla_put_string(nlm, IFLA_INFO_KIND, "dsa");
1887 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
1888 if (!infodata)
1889 goto failure;
1890
1891 nla_put_u32(nlm, IFLA_DSA_MASTER, master_ifindex);
1892
1893 nla_nest_end(nlm, infodata);
1894 nla_nest_end(nlm, linkinfo);
1895
1896 system_rtnl_call(nlm);
1897
1898 return;
1899
1900 failure:
1901 nlmsg_free(nlm);
1902 }
1903 #endif
1904
1905 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1906 {
1907 if (nr < 0)
1908 return;
1909
1910 if (nr >= (nwords * 32))
1911 return;
1912
1913 mask[nr / 32] &= ~(1U << (nr % 32));
1914 }
1915
1916 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1917 {
1918 if (nr < 0)
1919 return false;
1920
1921 if (nr >= (nwords * 32))
1922 return false;
1923
1924 return !!(mask[nr / 32] & (1U << (nr % 32)));
1925 }
1926
1927 static int
1928 system_get_ethtool_gro(struct device *dev)
1929 {
1930 struct ethtool_value ecmd;
1931 struct ifreq ifr = {
1932 .ifr_data = (caddr_t)&ecmd,
1933 };
1934
1935 memset(&ecmd, 0, sizeof(ecmd));
1936 ecmd.cmd = ETHTOOL_GGRO;
1937 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1938
1939 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1940 return -1;
1941
1942 return ecmd.data;
1943 }
1944
1945 static void
1946 system_set_ethtool_gro(struct device *dev, struct device_settings *s)
1947 {
1948 struct ethtool_value ecmd;
1949 struct ifreq ifr = {
1950 .ifr_data = (caddr_t)&ecmd,
1951 };
1952
1953 memset(&ecmd, 0, sizeof(ecmd));
1954 ecmd.cmd = ETHTOOL_SGRO;
1955 ecmd.data = s->gro;
1956 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1957
1958 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1959 }
1960
1961 static void
1962 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1963 {
1964 struct ethtool_pauseparam pp;
1965 struct ifreq ifr = {
1966 .ifr_data = (caddr_t)&pp,
1967 };
1968
1969 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1970 memset(&pp, 0, sizeof(pp));
1971 pp.cmd = ETHTOOL_GPAUSEPARAM;
1972 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1973 return;
1974
1975 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1976 pp.autoneg = AUTONEG_DISABLE;
1977
1978 if (s->flags & DEV_OPT_PAUSE) {
1979 if (s->flags & DEV_OPT_RXPAUSE)
1980 pp.rx_pause = s->rxpause && s->pause;
1981 else
1982 pp.rx_pause = s->pause;
1983
1984 if (s->flags & DEV_OPT_TXPAUSE)
1985 pp.tx_pause = s->txpause && s->pause;
1986 else
1987 pp.tx_pause = s->pause;
1988 } else {
1989 if (s->flags & DEV_OPT_RXPAUSE)
1990 pp.rx_pause = s->rxpause;
1991
1992 if (s->flags & DEV_OPT_TXPAUSE)
1993 pp.tx_pause = s->txpause;
1994 }
1995
1996 if (s->flags & DEV_OPT_ASYM_PAUSE &&
1997 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
1998 pp.rx_pause = pp.tx_pause = false;
1999 } else {
2000 pp.autoneg = AUTONEG_ENABLE;
2001 /* Pause and Asym_Pause advertising bits will be set via
2002 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
2003 */
2004 }
2005
2006 pp.cmd = ETHTOOL_SPAUSEPARAM;
2007 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2008 }
2009
2010 static void
2011 system_set_ethtool_eee_settings(struct device *dev, struct device_settings *s)
2012 {
2013 struct ethtool_eee eeecmd;
2014 struct ifreq ifr = {
2015 .ifr_data = (caddr_t)&eeecmd,
2016 };
2017
2018 memset(&eeecmd, 0, sizeof(eeecmd));
2019 eeecmd.cmd = ETHTOOL_SEEE;
2020 eeecmd.eee_enabled = s->eee;
2021 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2022
2023 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2024 netifd_log_message(L_WARNING, "cannot set eee %d for device %s", s->eee, dev->ifname);
2025 }
2026
2027 static void
2028 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
2029 {
2030 struct {
2031 struct ethtool_link_settings req;
2032 __u32 link_mode_data[3 * 127];
2033 } ecmd;
2034 struct ifreq ifr = {
2035 .ifr_data = (caddr_t)&ecmd,
2036 };
2037 size_t i;
2038 __s8 nwords;
2039 __u32 *supported, *advertising;
2040
2041 system_set_ethtool_pause(dev, s);
2042
2043 if (s->flags & DEV_OPT_EEE)
2044 system_set_ethtool_eee_settings(dev, s);
2045
2046 memset(&ecmd, 0, sizeof(ecmd));
2047 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2048 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2049
2050 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2051 ecmd.req.link_mode_masks_nwords >= 0 ||
2052 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2053 return;
2054
2055 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2056
2057 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2058 ecmd.req.link_mode_masks_nwords <= 0 ||
2059 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2060 return;
2061
2062 nwords = ecmd.req.link_mode_masks_nwords;
2063 supported = &ecmd.link_mode_data[0];
2064 advertising = &ecmd.link_mode_data[nwords];
2065 memcpy(advertising, supported, sizeof(__u32) * nwords);
2066
2067 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2068 if (s->flags & DEV_OPT_DUPLEX) {
2069 if (s->duplex)
2070 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2071 else
2072 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2073 }
2074 if (!(s->flags & DEV_OPT_SPEED) ||
2075 s->speed == ethtool_modes[i].speed)
2076 continue;
2077
2078 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2079 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2080 }
2081
2082 if (s->flags & DEV_OPT_PAUSE)
2083 if (!s->pause)
2084 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
2085
2086 if (s->flags & DEV_OPT_ASYM_PAUSE)
2087 if (!s->asym_pause)
2088 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
2089
2090 if (s->flags & DEV_OPT_AUTONEG) {
2091 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
2092 if (!s->autoneg) {
2093 if (s->flags & DEV_OPT_SPEED)
2094 ecmd.req.speed = s->speed;
2095
2096 if (s->flags & DEV_OPT_DUPLEX)
2097 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
2098 }
2099 }
2100
2101 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
2102 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2103 }
2104
2105 static void
2106 system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s)
2107 {
2108 if (s->flags & DEV_OPT_GRO)
2109 system_set_ethtool_gro(dev, s);
2110 }
2111
2112 void
2113 system_if_get_settings(struct device *dev, struct device_settings *s)
2114 {
2115 struct ifreq ifr;
2116 char buf[10];
2117 int ret;
2118
2119 memset(&ifr, 0, sizeof(ifr));
2120 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2121
2122 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
2123 s->mtu = ifr.ifr_mtu;
2124 s->flags |= DEV_OPT_MTU;
2125 }
2126
2127 s->mtu6 = system_update_ipv6_mtu(dev, 0);
2128 if (s->mtu6 > 0)
2129 s->flags |= DEV_OPT_MTU6;
2130
2131 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
2132 s->txqueuelen = ifr.ifr_qlen;
2133 s->flags |= DEV_OPT_TXQUEUELEN;
2134 }
2135
2136 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
2137 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
2138 s->flags |= DEV_OPT_MACADDR;
2139 }
2140
2141 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
2142 s->ipv6 = !strtoul(buf, NULL, 0);
2143 s->flags |= DEV_OPT_IPV6;
2144 }
2145
2146 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
2147 s->ip6segmentrouting = strtoul(buf, NULL, 0);
2148 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
2149 }
2150
2151 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
2152 s->promisc = ifr.ifr_flags & IFF_PROMISC;
2153 s->flags |= DEV_OPT_PROMISC;
2154
2155 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
2156 s->flags |= DEV_OPT_MULTICAST;
2157 }
2158
2159 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
2160 s->rpfilter = strtoul(buf, NULL, 0);
2161 s->flags |= DEV_OPT_RPFILTER;
2162 }
2163
2164 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
2165 s->acceptlocal = strtoul(buf, NULL, 0);
2166 s->flags |= DEV_OPT_ACCEPTLOCAL;
2167 }
2168
2169 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
2170 s->igmpversion = strtoul(buf, NULL, 0);
2171 s->flags |= DEV_OPT_IGMPVERSION;
2172 }
2173
2174 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
2175 s->mldversion = strtoul(buf, NULL, 0);
2176 s->flags |= DEV_OPT_MLDVERSION;
2177 }
2178
2179 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
2180 s->neigh4reachabletime = strtoul(buf, NULL, 0);
2181 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2182 }
2183
2184 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
2185 s->neigh6reachabletime = strtoul(buf, NULL, 0);
2186 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2187 }
2188
2189 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
2190 s->neigh4locktime = strtol(buf, NULL, 0);
2191 s->flags |= DEV_OPT_NEIGHLOCKTIME;
2192 }
2193
2194 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
2195 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
2196 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2197 }
2198
2199 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
2200 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
2201 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2202 }
2203
2204 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
2205 s->dadtransmits = strtoul(buf, NULL, 0);
2206 s->flags |= DEV_OPT_DADTRANSMITS;
2207 }
2208
2209 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
2210 s->sendredirects = strtoul(buf, NULL, 0);
2211 s->flags |= DEV_OPT_SENDREDIRECTS;
2212 }
2213
2214 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2215 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2216 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
2217 }
2218
2219 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2220 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2221 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
2222 }
2223
2224 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
2225 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
2226 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
2227 }
2228
2229 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
2230 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
2231 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
2232 }
2233
2234 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
2235 s->arp_accept = strtoul(buf, NULL, 0);
2236 s->flags |= DEV_OPT_ARP_ACCEPT;
2237 }
2238
2239 ret = system_get_ethtool_gro(dev);
2240 if (ret >= 0) {
2241 s->gro = ret;
2242 s->flags |= DEV_OPT_GRO;
2243 }
2244
2245 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2246 ret = system_if_get_master_ifindex(dev);
2247 if (ret >= 0) {
2248 s->master_ifindex = ret;
2249 s->flags |= DEV_OPT_MASTER;
2250 }
2251 #endif
2252 }
2253
2254 void
2255 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
2256 {
2257 struct ifreq ifr;
2258 char buf[12];
2259
2260 apply_mask &= s->flags;
2261
2262 memset(&ifr, 0, sizeof(ifr));
2263 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2264 if (apply_mask & DEV_OPT_MTU) {
2265 ifr.ifr_mtu = s->mtu;
2266 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2267 s->flags &= ~DEV_OPT_MTU;
2268 }
2269 if (apply_mask & DEV_OPT_MTU6) {
2270 system_update_ipv6_mtu(dev, s->mtu6);
2271 }
2272 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2273 ifr.ifr_qlen = s->txqueuelen;
2274 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2275 s->flags &= ~DEV_OPT_TXQUEUELEN;
2276 }
2277 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2278 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2279 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2280 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2281 s->flags &= ~DEV_OPT_MACADDR;
2282 }
2283 if (apply_mask & DEV_OPT_IPV6)
2284 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2285 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2286 struct device dummy = {
2287 .ifname = "all",
2288 };
2289 bool ip6segmentrouting = device_check_ip6segmentrouting();
2290
2291 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2292 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2293 }
2294 if (apply_mask & DEV_OPT_PROMISC) {
2295 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2296 !s->promisc ? IFF_PROMISC : 0) < 0)
2297 s->flags &= ~DEV_OPT_PROMISC;
2298 }
2299 if (apply_mask & DEV_OPT_RPFILTER) {
2300 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2301 system_set_rpfilter(dev, buf);
2302 }
2303 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2304 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2305 if (apply_mask & DEV_OPT_IGMPVERSION) {
2306 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2307 system_set_igmpversion(dev, buf);
2308 }
2309 if (apply_mask & DEV_OPT_MLDVERSION) {
2310 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2311 system_set_mldversion(dev, buf);
2312 }
2313 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2314 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2315 system_set_neigh4reachabletime(dev, buf);
2316 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2317 system_set_neigh6reachabletime(dev, buf);
2318 }
2319 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2320 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2321 system_set_neigh4locktime(dev, buf);
2322 }
2323 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2324 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2325 system_set_neigh4gcstaletime(dev, buf);
2326 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2327 system_set_neigh6gcstaletime(dev, buf);
2328 }
2329 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2330 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2331 system_set_dadtransmits(dev, buf);
2332 }
2333 if (apply_mask & DEV_OPT_MULTICAST) {
2334 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2335 !s->multicast ? IFF_MULTICAST : 0) < 0)
2336 s->flags &= ~DEV_OPT_MULTICAST;
2337 }
2338 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2339 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2340 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2341 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2342 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2343 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2344 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2345 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2346 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2347 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2348 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2349 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2350 if (apply_mask & DEV_OPT_MASTER) {
2351 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2352 system_set_master(dev, s->master_ifindex);
2353 system_refresh_orig_macaddr(dev, &dev->orig_settings);
2354 #else
2355 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 6.1.0, changing DSA port conduit is not supported!", dev->ifname);
2356 #endif
2357 }
2358 system_set_ethtool_settings(dev, s);
2359 }
2360
2361 void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s)
2362 {
2363 system_set_ethtool_settings_after_up(dev, s);
2364 }
2365
2366 int system_if_up(struct device *dev)
2367 {
2368 return system_if_flags(dev->ifname, IFF_UP, 0);
2369 }
2370
2371 int system_if_down(struct device *dev)
2372 {
2373 return system_if_flags(dev->ifname, 0, IFF_UP);
2374 }
2375
2376 struct if_check_data {
2377 struct device *dev;
2378 int pending;
2379 int ret;
2380 };
2381
2382 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2383 {
2384 struct nlmsghdr *nh = nlmsg_hdr(msg);
2385 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2386 struct if_check_data *chk = (struct if_check_data *)arg;
2387
2388 if (nh->nlmsg_type != RTM_NEWLINK)
2389 return NL_SKIP;
2390
2391 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2392 return NL_OK;
2393 }
2394
2395 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2396 {
2397 struct if_check_data *chk = (struct if_check_data *)arg;
2398 chk->pending = 0;
2399 return NL_STOP;
2400 }
2401
2402 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2403 {
2404 struct if_check_data *chk = (struct if_check_data *)arg;
2405
2406 if (chk->dev->type == &simple_device_type)
2407 device_set_present(chk->dev, false);
2408 device_set_link(chk->dev, false);
2409 chk->pending = err->error;
2410
2411 return NL_STOP;
2412 }
2413
2414 struct bridge_vlan_check_data {
2415 struct device *check_dev;
2416 int ifindex;
2417 int ret;
2418 bool pending;
2419 };
2420
2421 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2422 struct bridge_vlan_port *port,
2423 struct bridge_vlan_info *vinfo)
2424 {
2425 uint16_t flags = 0, diff, mask;
2426
2427 if (port->flags & BRVLAN_F_PVID)
2428 flags |= BRIDGE_VLAN_INFO_PVID;
2429 if (port->flags & BRVLAN_F_UNTAGGED)
2430 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2431
2432 diff = vinfo->flags ^ flags;
2433 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2434 if (diff & mask) {
2435 data->ret = 1;
2436 data->pending = false;
2437 }
2438
2439 port->check = 1;
2440 }
2441
2442 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2443 struct rtattr *attr)
2444 {
2445 struct bridge_vlan_hotplug_port *port;
2446 struct bridge_vlan_info *vinfo;
2447 struct bridge_vlan *vlan;
2448 struct rtattr *cur;
2449 int rem = RTA_PAYLOAD(attr);
2450 int i;
2451
2452 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2453 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2454 continue;
2455
2456 vinfo = RTA_DATA(cur);
2457 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2458 if (!vlan) {
2459 data->ret = 1;
2460 data->pending = false;
2461 return;
2462 }
2463
2464 for (i = 0; i < vlan->n_ports; i++)
2465 if (!vlan->ports[i].check)
2466 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2467
2468 list_for_each_entry(port, &vlan->hotplug_ports, list)
2469 if (!port->port.check)
2470 bridge_vlan_check_port(data, &port->port, vinfo);
2471 }
2472 }
2473
2474 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2475 {
2476 struct bridge_vlan_check_data *data = arg;
2477 struct nlmsghdr *nh = nlmsg_hdr(msg);
2478 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2479 struct rtattr *attr;
2480 int rem;
2481
2482 if (nh->nlmsg_type != RTM_NEWLINK)
2483 return NL_SKIP;
2484
2485 if (ifi->ifi_family != AF_BRIDGE)
2486 return NL_SKIP;
2487
2488 if (ifi->ifi_index != data->ifindex)
2489 return NL_SKIP;
2490
2491 attr = IFLA_RTA(ifi);
2492 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2493 while (RTA_OK(attr, rem)) {
2494 if (attr->rta_type == IFLA_AF_SPEC)
2495 bridge_vlan_check_attr(data, attr);
2496
2497 attr = RTA_NEXT(attr, rem);
2498 }
2499
2500 return NL_SKIP;
2501 }
2502
2503 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2504 {
2505 struct bridge_vlan_check_data *data = arg;
2506 data->pending = false;
2507 return NL_STOP;
2508 }
2509
2510 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2511 {
2512 struct bridge_vlan_check_data *data = arg;
2513 data->pending = false;
2514 return NL_STOP;
2515 }
2516
2517 int system_bridge_vlan_check(struct device *dev, char *ifname)
2518 {
2519 struct bridge_vlan_check_data data = {
2520 .check_dev = dev,
2521 .ifindex = if_nametoindex(ifname),
2522 .ret = -1,
2523 .pending = true,
2524 };
2525 static struct ifinfomsg ifi = {
2526 .ifi_family = AF_BRIDGE
2527 };
2528 static struct rtattr ext_req = {
2529 .rta_type = IFLA_EXT_MASK,
2530 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2531 };
2532 uint32_t filter = RTEXT_FILTER_BRVLAN;
2533 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2534 struct bridge_vlan *vlan;
2535 struct nl_msg *msg;
2536 int i;
2537
2538 if (!data.ifindex)
2539 return 0;
2540
2541 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2542
2543 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2544 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2545 nlmsg_append(msg, &filter, sizeof(filter), 0))
2546 goto free;
2547
2548 vlist_for_each_element(&dev->vlans, vlan, node) {
2549 struct bridge_vlan_hotplug_port *port;
2550
2551 for (i = 0; i < vlan->n_ports; i++) {
2552 if (!strcmp(vlan->ports[i].ifname, ifname))
2553 vlan->ports[i].check = 0;
2554 else
2555 vlan->ports[i].check = -1;
2556 }
2557
2558 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2559 if (!strcmp(port->port.ifname, ifname))
2560 port->port.check = 0;
2561 else
2562 port->port.check = -1;
2563 }
2564 }
2565
2566 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2567 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2568 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2569 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2570
2571 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2572 goto free;
2573
2574 data.ret = 0;
2575 while (data.pending)
2576 nl_recvmsgs(sock_rtnl, cb);
2577
2578 vlist_for_each_element(&dev->vlans, vlan, node) {
2579 struct bridge_vlan_hotplug_port *port;
2580
2581 for (i = 0; i < vlan->n_ports; i++) {
2582 if (!vlan->ports[i].check) {
2583 data.ret = 1;
2584 break;
2585 }
2586 }
2587
2588 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2589 if (!port->port.check) {
2590 data.ret = 1;
2591 break;
2592 }
2593 }
2594 }
2595
2596 free:
2597 nlmsg_free(msg);
2598 nl_cb_put(cb);
2599 return data.ret;
2600 }
2601
2602 int system_if_check(struct device *dev)
2603 {
2604 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2605 struct nl_msg *msg;
2606 struct ifinfomsg ifi = {
2607 .ifi_family = AF_UNSPEC,
2608 .ifi_index = 0,
2609 };
2610 struct if_check_data chk = {
2611 .dev = dev,
2612 .pending = 1,
2613 };
2614 int ret = 1;
2615
2616 if (!cb)
2617 return ret;
2618
2619 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2620 if (!msg)
2621 goto out;
2622
2623 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2624 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2625 goto free;
2626
2627 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2628 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2629 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2630
2631 ret = nl_send_auto_complete(sock_rtnl, msg);
2632 if (ret < 0)
2633 goto free;
2634
2635 while (chk.pending > 0)
2636 nl_recvmsgs(sock_rtnl, cb);
2637
2638 ret = chk.pending;
2639
2640 free:
2641 nlmsg_free(msg);
2642 out:
2643 nl_cb_put(cb);
2644 return ret;
2645 }
2646
2647 struct device *
2648 system_if_get_parent(struct device *dev)
2649 {
2650 char buf[64], *devname;
2651 int ifindex, iflink;
2652
2653 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2654 return NULL;
2655
2656 iflink = strtoul(buf, NULL, 0);
2657 ifindex = system_if_resolve(dev);
2658 if (!iflink || iflink == ifindex)
2659 return NULL;
2660
2661 devname = if_indextoname(iflink, buf);
2662 if (!devname)
2663 return NULL;
2664
2665 return device_get(devname, true);
2666 }
2667
2668 static bool
2669 read_string_file(int dir_fd, const char *file, char *buf, int len)
2670 {
2671 bool ret = false;
2672 char *c;
2673 int fd;
2674
2675 fd = openat(dir_fd, file, O_RDONLY);
2676 if (fd < 0)
2677 return false;
2678
2679 retry:
2680 len = read(fd, buf, len - 1);
2681 if (len < 0) {
2682 if (errno == EINTR)
2683 goto retry;
2684 } else if (len > 0) {
2685 buf[len] = 0;
2686
2687 c = strchr(buf, '\n');
2688 if (c)
2689 *c = 0;
2690
2691 ret = true;
2692 }
2693
2694 close(fd);
2695
2696 return ret;
2697 }
2698
2699 static bool
2700 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2701 {
2702 char buf[64];
2703 bool ret = false;
2704
2705 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2706 if (ret)
2707 *val = strtoull(buf, NULL, 0);
2708
2709 return ret;
2710 }
2711
2712 bool
2713 system_if_force_external(const char *ifname)
2714 {
2715 struct stat s;
2716
2717 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2718 }
2719
2720 static const char *
2721 system_netdevtype_name(unsigned short dev_type)
2722 {
2723 size_t i;
2724
2725 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2726 if (netdev_types[i].id == dev_type)
2727 return netdev_types[i].name;
2728 }
2729
2730 /* the last key is used by default */
2731 i = ARRAY_SIZE(netdev_types) - 1;
2732
2733 return netdev_types[i].name;
2734 }
2735
2736 static void
2737 system_add_devtype(struct blob_buf *b, const char *ifname)
2738 {
2739 char buf[100];
2740 bool found = false;
2741
2742 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2743 const char *info = "DEVTYPE=";
2744 char *context = NULL;
2745 const char *line = strtok_r(buf, "\r\n", &context);
2746
2747 while (line != NULL) {
2748 char *index = strstr(line, info);
2749
2750 if (index != NULL) {
2751 blobmsg_add_string(b, "devtype", index + strlen(info));
2752 found = true;
2753 break;
2754 }
2755
2756 line = strtok_r(NULL, "\r\n", &context);
2757 }
2758 }
2759
2760 if (!found) {
2761 unsigned short number = 0;
2762 const char *name = NULL;
2763
2764 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2765 number = strtoul(buf, NULL, 0);
2766 name = system_netdevtype_name(number);
2767 blobmsg_add_string(b, "devtype", name);
2768 }
2769 }
2770 }
2771
2772 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2773
2774 static int32_t
2775 ethtool_feature_count(const char *ifname)
2776 {
2777 struct {
2778 struct ethtool_sset_info hdr;
2779 uint32_t buf;
2780 } req = {
2781 .hdr = {
2782 .cmd = ETHTOOL_GSSET_INFO,
2783 .sset_mask = 1 << ETH_SS_FEATURES
2784 }
2785 };
2786
2787 struct ifreq ifr = {
2788 .ifr_data = (void *)&req
2789 };
2790
2791 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2792
2793 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2794 return -1;
2795
2796 if (!req.hdr.sset_mask)
2797 return 0;
2798
2799 return req.buf;
2800 }
2801
2802 static int32_t
2803 ethtool_feature_index(const char *ifname, const char *keyname)
2804 {
2805 struct ethtool_gstrings *feature_names;
2806 struct ifreq ifr = { 0 };
2807 int32_t n_features;
2808 uint32_t i;
2809
2810 n_features = ethtool_feature_count(ifname);
2811
2812 if (n_features <= 0)
2813 return -1;
2814
2815 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2816
2817 if (!feature_names)
2818 return -1;
2819
2820 feature_names->cmd = ETHTOOL_GSTRINGS;
2821 feature_names->string_set = ETH_SS_FEATURES;
2822 feature_names->len = n_features;
2823
2824 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2825 ifr.ifr_data = (void *)feature_names;
2826
2827 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2828 free(feature_names);
2829
2830 return -1;
2831 }
2832
2833 for (i = 0; i < feature_names->len; i++)
2834 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2835 break;
2836
2837 if (i >= feature_names->len)
2838 i = -1;
2839
2840 free(feature_names);
2841
2842 return i;
2843 }
2844
2845 static bool
2846 ethtool_feature_value(const char *ifname, const char *keyname)
2847 {
2848 struct ethtool_get_features_block *feature_block;
2849 struct ethtool_gfeatures *feature_values;
2850 struct ifreq ifr = { 0 };
2851 int32_t feature_idx;
2852 bool active;
2853
2854 feature_idx = ethtool_feature_index(ifname, keyname);
2855
2856 if (feature_idx < 0)
2857 return false;
2858
2859 feature_values = calloc(1,
2860 sizeof(*feature_values) +
2861 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2862
2863 if (!feature_values)
2864 return false;
2865
2866 feature_values->cmd = ETHTOOL_GFEATURES;
2867 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2868
2869 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2870 ifr.ifr_data = (void *)feature_values;
2871
2872 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2873 free(feature_values);
2874
2875 return false;
2876 }
2877
2878 feature_block = &feature_values->features[feature_idx / 32];
2879 active = feature_block->active & (1U << feature_idx % 32);
2880
2881 free(feature_values);
2882
2883 return active;
2884 }
2885
2886 static void
2887 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2888 {
2889 char *buf;
2890
2891 /* allocate string buffer large enough for the mode name and a suffix
2892 * "-F" or "-H" indicating full duplex or half duplex.
2893 */
2894 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2895 if (!buf)
2896 return;
2897
2898 strcpy(buf, ethtool_modes[i].name);
2899 if (half)
2900 strcat(buf, "-H");
2901 else
2902 strcat(buf, "-F");
2903
2904 blobmsg_add_string_buffer(b);
2905 }
2906
2907 static void
2908 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2909 {
2910 size_t i;
2911
2912 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2913 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2914 system_add_link_mode_name(b, i, true);
2915
2916 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2917 system_add_link_mode_name(b, i, false);
2918 }
2919 }
2920
2921 static void
2922 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2923 {
2924 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2925 blobmsg_add_string(b, NULL, "pause");
2926
2927 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2928 blobmsg_add_string(b, NULL, "asym_pause");
2929 }
2930
2931
2932 static void
2933 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2934 __u32 *advertising, __u32 *lp_advertising)
2935 {
2936 bool an_rx = false, an_tx = false;
2937 void *d;
2938
2939 d = blobmsg_open_array(b, "negotiated");
2940
2941 /* Work out negotiated pause frame usage per
2942 * IEEE 802.3-2005 table 28B-3.
2943 */
2944 if (ethtool_link_mode_test_bit(nwords,
2945 ETHTOOL_LINK_MODE_Pause_BIT,
2946 advertising) &&
2947 ethtool_link_mode_test_bit(nwords,
2948 ETHTOOL_LINK_MODE_Pause_BIT,
2949 lp_advertising)) {
2950 an_tx = true;
2951 an_rx = true;
2952 } else if (ethtool_link_mode_test_bit(nwords,
2953 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2954 advertising) &&
2955 ethtool_link_mode_test_bit(nwords,
2956 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2957 lp_advertising)) {
2958 if (ethtool_link_mode_test_bit(nwords,
2959 ETHTOOL_LINK_MODE_Pause_BIT,
2960 advertising))
2961 an_rx = true;
2962 else if (ethtool_link_mode_test_bit(nwords,
2963 ETHTOOL_LINK_MODE_Pause_BIT,
2964 lp_advertising))
2965 an_tx = true;
2966 }
2967 if (an_tx)
2968 blobmsg_add_string(b, NULL, "rx");
2969
2970 if (an_rx)
2971 blobmsg_add_string(b, NULL, "tx");
2972
2973 blobmsg_close_array(b, d);
2974 }
2975
2976 static void
2977 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2978 {
2979 struct ethtool_pauseparam pp;
2980 struct ifreq ifr = {
2981 .ifr_data = (caddr_t)&pp,
2982 };
2983
2984 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2985 memset(&pp, 0, sizeof(pp));
2986 pp.cmd = ETHTOOL_GPAUSEPARAM;
2987
2988 /* may fail */
2989 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2990 *pause_autoneg = true;
2991 return;
2992 }
2993
2994 *rx_pause = pp.rx_pause;
2995 *tx_pause = pp.tx_pause;
2996 *pause_autoneg = pp.autoneg;
2997 }
2998
2999 int
3000 system_if_dump_info(struct device *dev, struct blob_buf *b)
3001 {
3002 __u32 *supported, *advertising, *lp_advertising;
3003 bool rx_pause, tx_pause, pause_autoneg;
3004 struct {
3005 struct ethtool_link_settings req;
3006 __u32 link_mode_data[3 * 127];
3007 } ecmd;
3008 struct ifreq ifr = {
3009 .ifr_data = (caddr_t)&ecmd,
3010 };
3011 __s8 nwords;
3012 void *c, *d;
3013 char *s;
3014
3015 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
3016
3017 memset(&ecmd, 0, sizeof(ecmd));
3018 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
3019 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
3020
3021 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3022 ecmd.req.link_mode_masks_nwords >= 0 ||
3023 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3024 return -EOPNOTSUPP;
3025
3026 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
3027
3028 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3029 ecmd.req.link_mode_masks_nwords <= 0 ||
3030 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3031 return -EIO;
3032
3033 nwords = ecmd.req.link_mode_masks_nwords;
3034 supported = &ecmd.link_mode_data[0];
3035 advertising = &ecmd.link_mode_data[nwords];
3036 lp_advertising = &ecmd.link_mode_data[2 * nwords];
3037
3038 c = blobmsg_open_array(b, "link-advertising");
3039 system_add_link_modes(nwords, b, advertising);
3040 blobmsg_close_array(b, c);
3041
3042 c = blobmsg_open_array(b, "link-partner-advertising");
3043 system_add_link_modes(nwords, b, lp_advertising);
3044 blobmsg_close_array(b, c);
3045
3046 c = blobmsg_open_array(b, "link-supported");
3047 system_add_link_modes(nwords, b, supported);
3048 blobmsg_close_array(b, c);
3049
3050 if (ethtool_validate_speed(ecmd.req.speed) &&
3051 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
3052 (ecmd.req.speed != 0)) {
3053 s = blobmsg_alloc_string_buffer(b, "speed", 10);
3054 snprintf(s, 8, "%d%c", ecmd.req.speed,
3055 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
3056 blobmsg_add_string_buffer(b);
3057 }
3058 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
3059
3060 c = blobmsg_open_table(b, "flow-control");
3061 blobmsg_add_u8(b, "autoneg", pause_autoneg);
3062
3063 d = blobmsg_open_array(b, "supported");
3064 system_add_pause_modes(nwords, b, supported);
3065 blobmsg_close_array(b, d);
3066
3067 if (pause_autoneg) {
3068 d = blobmsg_open_array(b, "link-advertising");
3069 system_add_pause_modes(nwords, b, advertising);
3070 blobmsg_close_array(b, d);
3071 }
3072
3073 d = blobmsg_open_array(b, "link-partner-advertising");
3074 system_add_pause_modes(nwords, b, lp_advertising);
3075 blobmsg_close_array(b, d);
3076
3077 if (pause_autoneg) {
3078 system_add_ethtool_pause_an(b, nwords, advertising,
3079 lp_advertising);
3080 } else {
3081 d = blobmsg_open_array(b, "selected");
3082 if (rx_pause)
3083 blobmsg_add_string(b, NULL, "rx");
3084
3085 if (tx_pause)
3086 blobmsg_add_string(b, NULL, "tx");
3087
3088 blobmsg_close_array(b, d);
3089 }
3090
3091 blobmsg_close_table(b, c);
3092
3093 blobmsg_add_u8(b, "hw-tc-offload",
3094 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
3095
3096 system_add_devtype(b, dev->ifname);
3097
3098 return 0;
3099 }
3100
3101 int
3102 system_if_dump_stats(struct device *dev, struct blob_buf *b)
3103 {
3104 const char *const counters[] = {
3105 "collisions", "rx_frame_errors", "tx_compressed",
3106 "multicast", "rx_length_errors", "tx_dropped",
3107 "rx_bytes", "rx_missed_errors", "tx_errors",
3108 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
3109 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
3110 "rx_dropped", "tx_aborted_errors", "tx_packets",
3111 "rx_errors", "tx_bytes", "tx_window_errors",
3112 "rx_fifo_errors", "tx_carrier_errors",
3113 };
3114 int stats_dir;
3115 size_t i;
3116 uint64_t val = 0;
3117
3118 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
3119 if (stats_dir < 0)
3120 return -1;
3121
3122 for (i = 0; i < ARRAY_SIZE(counters); i++)
3123 if (read_uint64_file(stats_dir, counters[i], &val))
3124 blobmsg_add_u64(b, counters[i], val);
3125
3126 close(stats_dir);
3127 return 0;
3128 }
3129
3130 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
3131 {
3132 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
3133 int alen = v4 ? 4 : 16;
3134 unsigned int flags = 0;
3135 struct ifaddrmsg ifa = {
3136 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
3137 .ifa_prefixlen = addr->mask,
3138 .ifa_index = dev->ifindex,
3139 };
3140
3141 struct nl_msg *msg;
3142 if (cmd == RTM_NEWADDR)
3143 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3144
3145 msg = nlmsg_alloc_simple(cmd, flags);
3146 if (!msg)
3147 return -1;
3148
3149 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
3150 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
3151 if (v4) {
3152 if (addr->broadcast)
3153 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
3154 if (addr->point_to_point)
3155 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
3156 } else {
3157 time_t now = system_get_rtime();
3158 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
3159
3160 if (addr->preferred_until) {
3161 int64_t preferred = addr->preferred_until - now;
3162 if (preferred < 0)
3163 preferred = 0;
3164 else if (preferred > UINT32_MAX)
3165 preferred = UINT32_MAX;
3166
3167 cinfo.ifa_prefered = preferred;
3168 }
3169
3170 if (addr->valid_until) {
3171 int64_t valid = addr->valid_until - now;
3172 if (valid <= 0) {
3173 nlmsg_free(msg);
3174 return -1;
3175 }
3176 else if (valid > UINT32_MAX)
3177 valid = UINT32_MAX;
3178
3179 cinfo.ifa_valid = valid;
3180 }
3181
3182 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
3183
3184 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
3185 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
3186 }
3187
3188 return system_rtnl_call(msg);
3189 }
3190
3191 int system_add_address(struct device *dev, struct device_addr *addr)
3192 {
3193 return system_addr(dev, addr, RTM_NEWADDR);
3194 }
3195
3196 int system_del_address(struct device *dev, struct device_addr *addr)
3197 {
3198 return system_addr(dev, addr, RTM_DELADDR);
3199 }
3200
3201 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
3202 {
3203 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3204 unsigned int flags = 0;
3205 struct ndmsg ndm = {
3206 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
3207 .ndm_ifindex = dev->ifindex,
3208 .ndm_state = NUD_PERMANENT,
3209 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
3210 };
3211 struct nl_msg *msg;
3212
3213 if (cmd == RTM_NEWNEIGH)
3214 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3215
3216 msg = nlmsg_alloc_simple(cmd, flags);
3217
3218 if (!msg)
3219 return -1;
3220
3221 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
3222
3223 nla_put(msg, NDA_DST, alen, &neighbor->addr);
3224 if (neighbor->flags & DEVNEIGH_MAC)
3225 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
3226
3227
3228 return system_rtnl_call(msg);
3229 }
3230
3231 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
3232 {
3233 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
3234 }
3235
3236 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
3237 {
3238 return system_neigh(dev, neighbor, RTM_DELNEIGH);
3239 }
3240
3241 static int system_rt(struct device *dev, struct device_route *route, int cmd)
3242 {
3243 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3244 bool have_gw;
3245 unsigned int flags = 0;
3246
3247 if (alen == 4)
3248 have_gw = !!route->nexthop.in.s_addr;
3249 else
3250 have_gw = route->nexthop.in6.s6_addr32[0] ||
3251 route->nexthop.in6.s6_addr32[1] ||
3252 route->nexthop.in6.s6_addr32[2] ||
3253 route->nexthop.in6.s6_addr32[3];
3254
3255 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
3256 ? route->table : RT_TABLE_MAIN;
3257
3258 struct rtmsg rtm = {
3259 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3260 .rtm_dst_len = route->mask,
3261 .rtm_src_len = route->sourcemask,
3262 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
3263 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
3264 .rtm_scope = RT_SCOPE_NOWHERE,
3265 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
3266 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
3267 };
3268 struct nl_msg *msg;
3269
3270 if (cmd == RTM_NEWROUTE) {
3271 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3272
3273 if (!dev) { /* Add null-route */
3274 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3275 rtm.rtm_type = RTN_UNREACHABLE;
3276 }
3277 else
3278 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3279 }
3280
3281 if (route->flags & DEVROUTE_TYPE) {
3282 rtm.rtm_type = route->type;
3283 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3284 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3285 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3286 rtm.rtm_table = RT_TABLE_LOCAL;
3287 }
3288
3289 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3290 rtm.rtm_scope = RT_SCOPE_HOST;
3291 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3292 rtm.rtm_type == RTN_ANYCAST) {
3293 rtm.rtm_scope = RT_SCOPE_LINK;
3294 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3295 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3296 rtm.rtm_type == RTN_THROW) {
3297 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3298 dev = NULL;
3299 }
3300 }
3301
3302 if (route->flags & DEVROUTE_NODEV)
3303 dev = NULL;
3304
3305 msg = nlmsg_alloc_simple(cmd, flags);
3306 if (!msg)
3307 return -1;
3308
3309 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3310
3311 if (route->mask)
3312 nla_put(msg, RTA_DST, alen, &route->addr);
3313
3314 if (route->sourcemask) {
3315 if (rtm.rtm_family == AF_INET)
3316 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3317 else
3318 nla_put(msg, RTA_SRC, alen, &route->source);
3319 }
3320
3321 if (route->metric > 0)
3322 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3323
3324 if (have_gw)
3325 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3326
3327 if (dev)
3328 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3329
3330 if (table >= 256)
3331 nla_put_u32(msg, RTA_TABLE, table);
3332
3333 if (route->flags & DEVROUTE_MTU) {
3334 struct nlattr *metrics;
3335
3336 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3337 goto nla_put_failure;
3338
3339 nla_put_u32(msg, RTAX_MTU, route->mtu);
3340
3341 nla_nest_end(msg, metrics);
3342 }
3343
3344 return system_rtnl_call(msg);
3345
3346 nla_put_failure:
3347 nlmsg_free(msg);
3348 return -ENOMEM;
3349 }
3350
3351 int system_add_route(struct device *dev, struct device_route *route)
3352 {
3353 return system_rt(dev, route, RTM_NEWROUTE);
3354 }
3355
3356 int system_del_route(struct device *dev, struct device_route *route)
3357 {
3358 return system_rt(dev, route, RTM_DELROUTE);
3359 }
3360
3361 int system_flush_routes(void)
3362 {
3363 const char *names[] = { "ipv4", "ipv6" };
3364 size_t i;
3365 int fd;
3366
3367 for (i = 0; i < ARRAY_SIZE(names); i++) {
3368 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3369 fd = open(dev_buf, O_WRONLY);
3370 if (fd < 0)
3371 continue;
3372
3373 if (write(fd, "-1", 2)) {}
3374 close(fd);
3375 }
3376 return 0;
3377 }
3378
3379 bool system_resolve_rt_type(const char *type, unsigned int *id)
3380 {
3381 return system_rtn_aton(type, id);
3382 }
3383
3384 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3385 {
3386 FILE *f;
3387 char *e, buf[128];
3388 unsigned int n, proto = 256;
3389 n = strtoul(type, &e, 0);
3390 if (!*e && e != type)
3391 proto = n;
3392 else if (!strcmp(type, "unspec"))
3393 proto = RTPROT_UNSPEC;
3394 else if (!strcmp(type, "kernel"))
3395 proto = RTPROT_KERNEL;
3396 else if (!strcmp(type, "boot"))
3397 proto = RTPROT_BOOT;
3398 else if (!strcmp(type, "static"))
3399 proto = RTPROT_STATIC;
3400 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3401 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3402 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3403 continue;
3404
3405 n = strtoul(e, NULL, 10);
3406 e = strtok(NULL, " \t\n");
3407
3408 if (e && !strcmp(e, type)) {
3409 proto = n;
3410 break;
3411 }
3412 }
3413 fclose(f);
3414 }
3415
3416 if (proto > 255)
3417 return false;
3418
3419 *id = proto;
3420 return true;
3421 }
3422
3423 bool system_resolve_rt_table(const char *name, unsigned int *id)
3424 {
3425 FILE *f;
3426 char *e, buf[128];
3427 unsigned int n, table = RT_TABLE_UNSPEC;
3428
3429 /* first try to parse table as number */
3430 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3431 table = n;
3432
3433 /* handle well known aliases */
3434 else if (!strcmp(name, "default"))
3435 table = RT_TABLE_DEFAULT;
3436 else if (!strcmp(name, "main"))
3437 table = RT_TABLE_MAIN;
3438 else if (!strcmp(name, "local"))
3439 table = RT_TABLE_LOCAL;
3440
3441 /* try to look up name in /etc/iproute2/rt_tables */
3442 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3443 {
3444 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3445 {
3446 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3447 continue;
3448
3449 n = strtoul(e, NULL, 10);
3450 e = strtok(NULL, " \t\n");
3451
3452 if (e && !strcmp(e, name))
3453 {
3454 table = n;
3455 break;
3456 }
3457 }
3458
3459 fclose(f);
3460 }
3461
3462 if (table == RT_TABLE_UNSPEC)
3463 return false;
3464
3465 *id = table;
3466 return true;
3467 }
3468
3469 bool system_is_default_rt_table(unsigned int id)
3470 {
3471 return (id == RT_TABLE_MAIN);
3472 }
3473
3474 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3475 {
3476 char *e;
3477 unsigned int n;
3478
3479 if (!strcmp(filter, "strict"))
3480 n = 1;
3481 else if (!strcmp(filter, "loose"))
3482 n = 2;
3483 else {
3484 n = strtoul(filter, &e, 0);
3485 if (*e || e == filter || n > 2)
3486 return false;
3487 }
3488
3489 *id = n;
3490 return true;
3491 }
3492
3493 static int system_iprule(struct iprule *rule, int cmd)
3494 {
3495 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3496
3497 struct nl_msg *msg;
3498 struct rtmsg rtm = {
3499 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3500 .rtm_protocol = RTPROT_STATIC,
3501 .rtm_scope = RT_SCOPE_UNIVERSE,
3502 .rtm_table = RT_TABLE_UNSPEC,
3503 .rtm_type = RTN_UNSPEC,
3504 .rtm_flags = 0,
3505 };
3506
3507 if (cmd == RTM_NEWRULE)
3508 rtm.rtm_type = RTN_UNICAST;
3509
3510 if (rule->invert)
3511 rtm.rtm_flags |= FIB_RULE_INVERT;
3512
3513 if (rule->flags & IPRULE_SRC)
3514 rtm.rtm_src_len = rule->src_mask;
3515
3516 if (rule->flags & IPRULE_DEST)
3517 rtm.rtm_dst_len = rule->dest_mask;
3518
3519 if (rule->flags & IPRULE_TOS)
3520 rtm.rtm_tos = rule->tos;
3521
3522 if (rule->flags & IPRULE_LOOKUP) {
3523 if (rule->lookup < 256)
3524 rtm.rtm_table = rule->lookup;
3525 }
3526
3527 if (rule->flags & IPRULE_ACTION)
3528 rtm.rtm_type = rule->action;
3529 else if (rule->flags & IPRULE_GOTO)
3530 rtm.rtm_type = FR_ACT_GOTO;
3531 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3532 rtm.rtm_type = FR_ACT_NOP;
3533
3534 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3535
3536 if (!msg)
3537 return -1;
3538
3539 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3540
3541 if (rule->flags & IPRULE_IN)
3542 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3543
3544 if (rule->flags & IPRULE_OUT)
3545 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3546
3547 if (rule->flags & IPRULE_SRC)
3548 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3549
3550 if (rule->flags & IPRULE_DEST)
3551 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3552
3553 if (rule->flags & IPRULE_PRIORITY)
3554 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3555 else if (cmd == RTM_NEWRULE)
3556 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3557
3558 if (rule->flags & IPRULE_FWMARK)
3559 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3560
3561 if (rule->flags & IPRULE_FWMASK)
3562 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3563
3564 if (rule->flags & IPRULE_LOOKUP) {
3565 if (rule->lookup >= 256)
3566 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3567 }
3568
3569 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3570 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3571
3572 if (rule->flags & IPRULE_UIDRANGE) {
3573 struct fib_rule_uid_range uidrange = {
3574 .start = rule->uidrange_start,
3575 .end = rule->uidrange_end
3576 };
3577
3578 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3579 }
3580
3581 if (rule->flags & IPRULE_GOTO)
3582 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3583
3584 return system_rtnl_call(msg);
3585 }
3586
3587 int system_add_iprule(struct iprule *rule)
3588 {
3589 return system_iprule(rule, RTM_NEWRULE);
3590 }
3591
3592 int system_del_iprule(struct iprule *rule)
3593 {
3594 return system_iprule(rule, RTM_DELRULE);
3595 }
3596
3597 int system_flush_iprules(void)
3598 {
3599 int rv = 0;
3600 struct iprule rule;
3601
3602 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3603 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3604
3605 memset(&rule, 0, sizeof(rule));
3606
3607
3608 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3609
3610 rule.priority = 0;
3611 rule.lookup = RT_TABLE_LOCAL;
3612 rv |= system_iprule(&rule, RTM_NEWRULE);
3613
3614 rule.priority = 32766;
3615 rule.lookup = RT_TABLE_MAIN;
3616 rv |= system_iprule(&rule, RTM_NEWRULE);
3617
3618 rule.priority = 32767;
3619 rule.lookup = RT_TABLE_DEFAULT;
3620 rv |= system_iprule(&rule, RTM_NEWRULE);
3621
3622
3623 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3624
3625 rule.priority = 0;
3626 rule.lookup = RT_TABLE_LOCAL;
3627 rv |= system_iprule(&rule, RTM_NEWRULE);
3628
3629 rule.priority = 32766;
3630 rule.lookup = RT_TABLE_MAIN;
3631 rv |= system_iprule(&rule, RTM_NEWRULE);
3632
3633 return rv;
3634 }
3635
3636 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3637 {
3638 return system_rtn_aton(action, id);
3639 }
3640
3641 time_t system_get_rtime(void)
3642 {
3643 struct timespec ts;
3644 struct timeval tv;
3645
3646 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3647 return ts.tv_sec;
3648
3649 if (gettimeofday(&tv, NULL) == 0)
3650 return tv.tv_sec;
3651
3652 return 0;
3653 }
3654
3655 #ifndef IP_DF
3656 #define IP_DF 0x4000
3657 #endif
3658
3659 static int tunnel_ioctl(const char *name, int cmd, void *p)
3660 {
3661 struct ifreq ifr;
3662
3663 memset(&ifr, 0, sizeof(ifr));
3664 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3665 ifr.ifr_ifru.ifru_data = p;
3666 return ioctl(sock_ioctl, cmd, &ifr);
3667 }
3668
3669 #ifdef IFLA_IPTUN_MAX
3670 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3671 struct blob_attr **tb)
3672 {
3673 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3674 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3675 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3676 struct blob_attr *cur;
3677 int ret = 0, ttl = 0;
3678
3679 if (!nlm)
3680 return -1;
3681
3682 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3683 nla_put_string(nlm, IFLA_IFNAME, name);
3684
3685 if (link)
3686 nla_put_u32(nlm, IFLA_LINK, link);
3687
3688 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3689 if (!linkinfo) {
3690 ret = -ENOMEM;
3691 goto failure;
3692 }
3693
3694 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3695 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3696 if (!infodata) {
3697 ret = -ENOMEM;
3698 goto failure;
3699 }
3700
3701 if (link)
3702 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3703
3704 if ((cur = tb[TUNNEL_ATTR_TTL]))
3705 ttl = blobmsg_get_u32(cur);
3706
3707 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3708 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3709
3710 struct in6_addr in6buf;
3711 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3712 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3713 ret = -EINVAL;
3714 goto failure;
3715 }
3716 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3717 }
3718
3719 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3720 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3721 ret = -EINVAL;
3722 goto failure;
3723 }
3724 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3725 }
3726
3727 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3728 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3729 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3730
3731 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3732 blobmsg_data(cur), blobmsg_len(cur));
3733
3734 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3735 char *str = blobmsg_get_string(cur);
3736
3737 if (strcmp(str, "ignore")) {
3738 char *e;
3739 unsigned encap_limit = strtoul(str, &e, 0);
3740
3741 if (e == str || *e || encap_limit > 255) {
3742 ret = -EINVAL;
3743 goto failure;
3744 }
3745
3746 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3747 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3748 }
3749 }
3750
3751 #ifdef IFLA_IPTUN_FMR_MAX
3752 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3753 struct blob_attr *rcur;
3754 unsigned rrem, fmrcnt = 0;
3755 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3756
3757 if (!fmrs) {
3758 ret = -ENOMEM;
3759 goto failure;
3760 }
3761
3762 blobmsg_for_each_attr(rcur, cur, rrem) {
3763 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3764 struct in6_addr ip6prefix;
3765 struct in_addr ip4prefix;
3766 unsigned ip4len, ip6len, ealen, offset;
3767
3768 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3769 blobmsg_data(rcur), blobmsg_len(rcur));
3770
3771 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3772 !parse_ip_and_netmask(AF_INET6,
3773 blobmsg_data(tb_cur), &ip6prefix,
3774 &ip6len)) {
3775 ret = -EINVAL;
3776 goto failure;
3777 }
3778
3779 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3780 !parse_ip_and_netmask(AF_INET,
3781 blobmsg_data(tb_cur), &ip4prefix,
3782 &ip4len)) {
3783 ret = -EINVAL;
3784 goto failure;
3785 }
3786
3787 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3788 ret = -EINVAL;
3789 goto failure;
3790 }
3791 ealen = blobmsg_get_u32(tb_cur);
3792
3793 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3794 ret = -EINVAL;
3795 goto failure;
3796 }
3797 offset = blobmsg_get_u32(tb_cur);
3798
3799 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3800 if (!rule) {
3801 ret = -ENOMEM;
3802 goto failure;
3803 }
3804
3805 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3806 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3807 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3808 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3809 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3810 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3811
3812 nla_nest_end(nlm, rule);
3813 }
3814
3815 nla_nest_end(nlm, fmrs);
3816 }
3817 #endif
3818 if (tun_flags)
3819 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3820 }
3821
3822 nla_nest_end(nlm, infodata);
3823 nla_nest_end(nlm, linkinfo);
3824
3825 return system_rtnl_call(nlm);
3826
3827 failure:
3828 nlmsg_free(nlm);
3829 return ret;
3830 }
3831 #endif
3832
3833 #ifdef IFLA_IPTUN_MAX
3834 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3835 static int system_add_gre_tunnel(const char *name, const char *kind,
3836 const unsigned int link, struct blob_attr **tb, bool v6)
3837 {
3838 struct nl_msg *nlm;
3839 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3840 struct blob_attr *cur;
3841 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3842 uint16_t iflags = 0, oflags = 0;
3843 uint8_t tos = 0;
3844 int ret = 0, ttl = 0;
3845 unsigned encap_limit = 0;
3846
3847 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3848 if (!nlm)
3849 return -1;
3850
3851 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3852 nla_put_string(nlm, IFLA_IFNAME, name);
3853
3854 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3855 if (!linkinfo) {
3856 ret = -ENOMEM;
3857 goto failure;
3858 }
3859
3860 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3861 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3862 if (!infodata) {
3863 ret = -ENOMEM;
3864 goto failure;
3865 }
3866
3867 if (link)
3868 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3869
3870 if ((cur = tb[TUNNEL_ATTR_TTL]))
3871 ttl = blobmsg_get_u32(cur);
3872
3873 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3874 char *str = blobmsg_get_string(cur);
3875 if (strcmp(str, "inherit")) {
3876 unsigned uval;
3877
3878 if (!system_tos_aton(str, &uval)) {
3879 ret = -EINVAL;
3880 goto failure;
3881 }
3882
3883 if (v6)
3884 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3885 else
3886 tos = uval;
3887 } else {
3888 if (v6)
3889 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3890 else
3891 tos = 1;
3892 }
3893 }
3894
3895 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3896 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3897
3898 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3899 blobmsg_data(cur), blobmsg_len(cur));
3900
3901 if ((cur = tb_data[GRE_DATA_IKEY])) {
3902 if ((ikey = blobmsg_get_u32(cur)))
3903 iflags |= GRE_KEY;
3904 }
3905
3906 if ((cur = tb_data[GRE_DATA_OKEY])) {
3907 if ((okey = blobmsg_get_u32(cur)))
3908 oflags |= GRE_KEY;
3909 }
3910
3911 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3912 if (blobmsg_get_bool(cur))
3913 iflags |= GRE_CSUM;
3914 }
3915
3916 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3917 if (blobmsg_get_bool(cur))
3918 oflags |= GRE_CSUM;
3919 }
3920
3921 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3922 if (blobmsg_get_bool(cur))
3923 iflags |= GRE_SEQ;
3924 }
3925
3926 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3927 if (blobmsg_get_bool(cur))
3928 oflags |= GRE_SEQ;
3929 }
3930
3931 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3932 char *str = blobmsg_get_string(cur);
3933
3934 if (strcmp(str, "ignore")) {
3935 char *e;
3936
3937 encap_limit = strtoul(str, &e, 0);
3938
3939 if (e == str || *e || encap_limit > 255) {
3940 ret = -EINVAL;
3941 goto failure;
3942 }
3943
3944 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3945 }
3946 }
3947 }
3948
3949 if (v6) {
3950 struct in6_addr in6buf;
3951 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3952 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3953 ret = -EINVAL;
3954 goto failure;
3955 }
3956 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3957 }
3958
3959 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3960 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3961 ret = -EINVAL;
3962 goto failure;
3963 }
3964 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3965 }
3966
3967 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3968 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3969
3970 if (flowinfo)
3971 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3972
3973 if (flags6)
3974 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3975
3976 if (!ttl)
3977 ttl = 64;
3978 } else {
3979 struct in_addr inbuf;
3980 bool set_df = true;
3981
3982 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3983 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3984 ret = -EINVAL;
3985 goto failure;
3986 }
3987 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3988 }
3989
3990 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3991 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3992 ret = -EINVAL;
3993 goto failure;
3994 }
3995 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3996
3997 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3998 if (!okey) {
3999 okey = inbuf.s_addr;
4000 oflags |= GRE_KEY;
4001 }
4002
4003 if (!ikey) {
4004 ikey = inbuf.s_addr;
4005 iflags |= GRE_KEY;
4006 }
4007 }
4008 }
4009
4010 if ((cur = tb[TUNNEL_ATTR_DF]))
4011 set_df = blobmsg_get_bool(cur);
4012
4013 if (!set_df) {
4014 /* ttl != 0 and nopmtudisc are incompatible */
4015 if (ttl) {
4016 ret = -EINVAL;
4017 goto failure;
4018 }
4019 } else if (!ttl)
4020 ttl = 64;
4021
4022 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
4023
4024 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
4025 }
4026
4027 if (ttl)
4028 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
4029
4030 if (oflags)
4031 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
4032
4033 if (iflags)
4034 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
4035
4036 if (okey)
4037 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
4038
4039 if (ikey)
4040 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
4041
4042 nla_nest_end(nlm, infodata);
4043 nla_nest_end(nlm, linkinfo);
4044
4045 return system_rtnl_call(nlm);
4046
4047 failure:
4048 nlmsg_free(nlm);
4049 return ret;
4050 }
4051 #endif
4052
4053 #ifdef IFLA_VTI_MAX
4054 static int system_add_vti_tunnel(const char *name, const char *kind,
4055 const unsigned int link, struct blob_attr **tb, bool v6)
4056 {
4057 struct nl_msg *nlm;
4058 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4059 struct blob_attr *cur;
4060 int ret = 0;
4061
4062 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4063 if (!nlm)
4064 return -1;
4065
4066 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4067 nla_put_string(nlm, IFLA_IFNAME, name);
4068
4069 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4070 if (!linkinfo) {
4071 ret = -ENOMEM;
4072 goto failure;
4073 }
4074
4075 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4076 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4077 if (!infodata) {
4078 ret = -ENOMEM;
4079 goto failure;
4080 }
4081
4082 if (link)
4083 nla_put_u32(nlm, IFLA_VTI_LINK, link);
4084
4085 if (v6) {
4086 struct in6_addr in6buf;
4087 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4088 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4089 ret = -EINVAL;
4090 goto failure;
4091 }
4092 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
4093 }
4094
4095 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4096 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4097 ret = -EINVAL;
4098 goto failure;
4099 }
4100 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
4101 }
4102
4103 } else {
4104 struct in_addr inbuf;
4105
4106 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4107 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4108 ret = -EINVAL;
4109 goto failure;
4110 }
4111 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
4112 }
4113
4114 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4115 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4116 ret = -EINVAL;
4117 goto failure;
4118 }
4119 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
4120 }
4121
4122 }
4123
4124 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4125 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
4126 uint32_t ikey = 0, okey = 0;
4127
4128 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
4129 blobmsg_data(cur), blobmsg_len(cur));
4130
4131 if ((cur = tb_data[VTI_DATA_IKEY])) {
4132 if ((ikey = blobmsg_get_u32(cur)))
4133 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
4134 }
4135
4136 if ((cur = tb_data[VTI_DATA_OKEY])) {
4137 if ((okey = blobmsg_get_u32(cur)))
4138 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
4139 }
4140 }
4141
4142 nla_nest_end(nlm, infodata);
4143 nla_nest_end(nlm, linkinfo);
4144
4145 return system_rtnl_call(nlm);
4146
4147 failure:
4148 nlmsg_free(nlm);
4149 return ret;
4150 }
4151 #endif
4152
4153 #ifdef IFLA_XFRM_MAX
4154 static int system_add_xfrm_tunnel(const char *name, const char *kind,
4155 const unsigned int link, struct blob_attr **tb)
4156 {
4157 struct nl_msg *nlm;
4158 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4159 struct blob_attr *cur;
4160 int ret = 0;
4161
4162 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4163 if (!nlm)
4164 return -1;
4165
4166 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4167 nla_put_string(nlm, IFLA_IFNAME, name);
4168
4169 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4170 if (!linkinfo) {
4171 ret = -ENOMEM;
4172 goto failure;
4173 }
4174
4175 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4176 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4177 if (!infodata) {
4178 ret = -ENOMEM;
4179 goto failure;
4180 }
4181
4182 if (link)
4183 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
4184
4185 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4186 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
4187 uint32_t if_id = 0;
4188
4189 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
4190 blobmsg_data(cur), blobmsg_len(cur));
4191
4192 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
4193 if ((if_id = blobmsg_get_u32(cur)))
4194 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
4195 }
4196
4197 }
4198
4199 nla_nest_end(nlm, infodata);
4200 nla_nest_end(nlm, linkinfo);
4201
4202 return system_rtnl_call(nlm);
4203
4204 failure:
4205 nlmsg_free(nlm);
4206 return ret;
4207 }
4208 #endif
4209
4210 #ifdef IFLA_VXLAN_MAX
4211 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
4212 struct blob_attr *cur;
4213 if ((cur = tb_data[vxlandatatype])) {
4214 bool val = blobmsg_get_bool(cur);
4215 if (invert)
4216 val = !val;
4217
4218 if ((attrtype == IFLA_VXLAN_GBP) && val)
4219 nla_put_flag(msg, attrtype);
4220 else
4221 nla_put_u8(msg, attrtype, val);
4222
4223 }
4224 }
4225
4226 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
4227 {
4228 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
4229 struct nl_msg *msg;
4230 struct nlattr *linkinfo, *data;
4231 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
4232 struct blob_attr *cur;
4233 int ret = 0;
4234
4235 if ((cur = tb[TUNNEL_ATTR_DATA]))
4236 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
4237 blobmsg_data(cur), blobmsg_len(cur));
4238 else
4239 return -EINVAL;
4240
4241 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
4242
4243 if (!msg)
4244 return -1;
4245
4246 nlmsg_append(msg, &iim, sizeof(iim), 0);
4247
4248 nla_put_string(msg, IFLA_IFNAME, name);
4249
4250 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
4251 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
4252 if (!ea) {
4253 ret = -EINVAL;
4254 goto failure;
4255 }
4256
4257 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
4258 }
4259
4260 if ((cur = tb[TUNNEL_ATTR_MTU])) {
4261 uint32_t mtu = blobmsg_get_u32(cur);
4262 nla_put_u32(msg, IFLA_MTU, mtu);
4263 }
4264
4265 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
4266 ret = -ENOMEM;
4267 goto failure;
4268 }
4269
4270 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
4271
4272 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
4273 ret = -ENOMEM;
4274 goto failure;
4275 }
4276
4277 if (link)
4278 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
4279
4280 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4281 uint32_t id = blobmsg_get_u32(cur);
4282 if (id >= (1u << 24) - 1) {
4283 ret = -EINVAL;
4284 goto failure;
4285 }
4286
4287 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4288 }
4289
4290 if (v6) {
4291 struct in6_addr in6buf;
4292 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4293 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4294 ret = -EINVAL;
4295 goto failure;
4296 }
4297 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4298 }
4299
4300 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4301 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4302 ret = -EINVAL;
4303 goto failure;
4304 }
4305 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4306 }
4307 } else {
4308 struct in_addr inbuf;
4309
4310 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4311 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4312 ret = -EINVAL;
4313 goto failure;
4314 }
4315 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4316 }
4317
4318 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4319 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4320 ret = -EINVAL;
4321 goto failure;
4322 }
4323 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4324 }
4325 }
4326
4327 uint32_t port = 4789;
4328 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4329 port = blobmsg_get_u32(cur);
4330 if (port < 1 || port > 65535) {
4331 ret = -EINVAL;
4332 goto failure;
4333 }
4334 }
4335 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4336
4337 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4338 struct ifla_vxlan_port_range srcports = {0,0};
4339
4340 uint32_t low = blobmsg_get_u32(cur);
4341 if (low < 1 || low > 65535 - 1) {
4342 ret = -EINVAL;
4343 goto failure;
4344 }
4345
4346 srcports.low = htons((uint16_t) low);
4347 srcports.high = htons((uint16_t) (low+1));
4348
4349 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4350 uint32_t high = blobmsg_get_u32(cur);
4351 if (high < 1 || high > 65535) {
4352 ret = -EINVAL;
4353 goto failure;
4354 }
4355
4356 if (high > low)
4357 srcports.high = htons((uint16_t) high);
4358 }
4359
4360 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4361 }
4362
4363 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4364 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4365 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4366 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4367 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4368 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4369 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4370 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4371 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4372
4373 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4374 uint32_t ageing = blobmsg_get_u32(cur);
4375 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4376 }
4377
4378 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4379 uint32_t maxaddress = blobmsg_get_u32(cur);
4380 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4381 }
4382
4383 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4384 char *str = blobmsg_get_string(cur);
4385 unsigned tos = 1;
4386
4387 if (strcmp(str, "inherit")) {
4388 if (!system_tos_aton(str, &tos)) {
4389 ret = -EINVAL;
4390 goto failure;
4391 }
4392 }
4393
4394 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4395 }
4396
4397 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4398 uint32_t ttl = blobmsg_get_u32(cur);
4399 if (ttl < 1 || ttl > 255) {
4400 ret = -EINVAL;
4401 goto failure;
4402 }
4403
4404 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4405 }
4406
4407 nla_nest_end(msg, data);
4408 nla_nest_end(msg, linkinfo);
4409
4410 ret = system_rtnl_call(msg);
4411 if (ret)
4412 D(SYSTEM, "Error adding vxlan '%s': %d", name, ret);
4413
4414 return ret;
4415
4416 failure:
4417 nlmsg_free(msg);
4418 return ret;
4419 }
4420 #endif
4421
4422 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4423 {
4424 struct blob_attr *cur;
4425 int ret = 0;
4426
4427 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4428 return -1;
4429
4430 #ifdef SIOCADD6RD
4431 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4432 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4433 unsigned int mask;
4434 struct ip_tunnel_6rd p6;
4435
4436 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4437 blobmsg_data(cur), blobmsg_len(cur));
4438
4439 memset(&p6, 0, sizeof(p6));
4440
4441 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4442 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4443 &p6.prefix, &mask) || mask > 128) {
4444 ret = -EINVAL;
4445 goto failure;
4446 }
4447
4448 p6.prefixlen = mask;
4449 }
4450
4451 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4452 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4453 &p6.relay_prefix, &mask) || mask > 32) {
4454 ret = -EINVAL;
4455 goto failure;
4456 }
4457
4458 p6.relay_prefixlen = mask;
4459 }
4460
4461 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4462 ret = -1;
4463 goto failure;
4464 }
4465 }
4466 #endif
4467
4468 return ret;
4469
4470 failure:
4471 system_link_del(name);
4472 return ret;
4473 }
4474
4475 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4476 {
4477 struct blob_attr *cur;
4478 bool set_df = true;
4479 struct ip_tunnel_parm p = {
4480 .link = link,
4481 .iph = {
4482 .version = 4,
4483 .ihl = 5,
4484 .protocol = proto,
4485 }
4486 };
4487
4488 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4489 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4490 return -EINVAL;
4491
4492 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4493 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4494 return -EINVAL;
4495
4496 if ((cur = tb[TUNNEL_ATTR_DF]))
4497 set_df = blobmsg_get_bool(cur);
4498
4499 if ((cur = tb[TUNNEL_ATTR_TTL]))
4500 p.iph.ttl = blobmsg_get_u32(cur);
4501
4502 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4503 char *str = blobmsg_get_string(cur);
4504 if (strcmp(str, "inherit")) {
4505 unsigned uval;
4506
4507 if (!system_tos_aton(str, &uval))
4508 return -EINVAL;
4509
4510 p.iph.tos = uval;
4511 } else
4512 p.iph.tos = 1;
4513 }
4514
4515 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4516 /* ttl !=0 and nopmtudisc are incompatible */
4517 if (p.iph.ttl && p.iph.frag_off == 0)
4518 return -EINVAL;
4519
4520 strncpy(p.name, name, sizeof(p.name) - 1);
4521
4522 switch (p.iph.protocol) {
4523 case IPPROTO_IPIP:
4524 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4525 case IPPROTO_IPV6:
4526 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4527 default:
4528 break;
4529 }
4530 return -1;
4531 }
4532
4533 int system_del_ip_tunnel(const struct device *dev)
4534 {
4535 return system_link_del(dev->ifname);
4536 }
4537
4538 int system_update_ipv6_mtu(struct device *dev, int mtu)
4539 {
4540 int ret = -1;
4541 char buf[64];
4542 int fd;
4543
4544 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4545 if (fd < 0)
4546 return ret;
4547
4548 if (!mtu) {
4549 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4550 if (len < 0)
4551 goto out;
4552
4553 buf[len] = 0;
4554 ret = atoi(buf);
4555 } else {
4556 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4557 ret = mtu;
4558 }
4559
4560 out:
4561 close(fd);
4562 return ret;
4563 }
4564
4565 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4566 {
4567 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4568 struct blob_attr *cur;
4569 const char *str;
4570
4571 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4572 blob_data(attr), blob_len(attr));
4573
4574 system_link_del(dev->ifname);
4575
4576 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4577 return -EINVAL;
4578 str = blobmsg_data(cur);
4579
4580 unsigned int ttl = 0;
4581 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4582 ttl = blobmsg_get_u32(cur);
4583 if (ttl > 255)
4584 return -EINVAL;
4585 }
4586
4587 unsigned int link = 0;
4588 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4589 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4590 if (!iface)
4591 return -EINVAL;
4592
4593 if (iface->l3_dev.dev)
4594 link = iface->l3_dev.dev->ifindex;
4595 }
4596
4597 if (!strcmp(str, "sit"))
4598 return system_add_sit_tunnel(dev->ifname, link, tb);
4599 #ifdef IFLA_IPTUN_MAX
4600 else if (!strcmp(str, "ipip6")) {
4601 return system_add_ip6_tunnel(dev->ifname, link, tb);
4602 } else if (!strcmp(str, "greip")) {
4603 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4604 } else if (!strcmp(str, "gretapip")) {
4605 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4606 } else if (!strcmp(str, "greip6")) {
4607 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4608 } else if (!strcmp(str, "gretapip6")) {
4609 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4610 #ifdef IFLA_VTI_MAX
4611 } else if (!strcmp(str, "vtiip")) {
4612 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4613 } else if (!strcmp(str, "vtiip6")) {
4614 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4615 #endif
4616 #ifdef IFLA_XFRM_MAX
4617 } else if (!strcmp(str, "xfrm")) {
4618 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4619 #endif
4620 #ifdef IFLA_VXLAN_MAX
4621 } else if(!strcmp(str, "vxlan")) {
4622 return system_add_vxlan(dev->ifname, link, tb, false);
4623 } else if(!strcmp(str, "vxlan6")) {
4624 return system_add_vxlan(dev->ifname, link, tb, true);
4625 #endif
4626 #endif
4627 } else if (!strcmp(str, "ipip")) {
4628 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4629 }
4630 else
4631 return -EINVAL;
4632
4633 return 0;
4634 }
OpenWrt Network interface configuration daemon