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system-linux: set pending to 0 on ifindex found or error for if_get_master
[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 bool 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 return;
1748 }
1749 }
1750
1751 static void if_get_master_linkinfo_attr(struct if_get_master_data *data,
1752 struct rtattr *attr)
1753 {
1754 struct rtattr *cur;
1755 int rem = RTA_PAYLOAD(attr);
1756
1757 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1758 if (cur->rta_type != IFLA_INFO_KIND && cur->rta_type != IFLA_INFO_DATA)
1759 continue;
1760
1761 if (cur->rta_type == IFLA_INFO_KIND && strcmp("dsa", (char *)RTA_DATA(cur)))
1762 return;
1763
1764 if (cur->rta_type == IFLA_INFO_DATA)
1765 if_get_master_dsa_linkinfo_attr(data, cur);
1766 }
1767 }
1768
1769 static int cb_if_get_master_valid(struct nl_msg *msg, void *arg)
1770 {
1771 struct nlmsghdr *nh = nlmsg_hdr(msg);
1772 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1773 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1774 struct rtattr *attr;
1775 int rem;
1776
1777 if (nh->nlmsg_type != RTM_NEWLINK)
1778 return NL_SKIP;
1779
1780 if (ifi->ifi_family != AF_UNSPEC)
1781 return NL_SKIP;
1782
1783 if (ifi->ifi_index != data->ifindex)
1784 return NL_SKIP;
1785
1786 attr = IFLA_RTA(ifi);
1787 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1788
1789 while (RTA_OK(attr, rem)) {
1790 if (attr->rta_type == IFLA_LINKINFO) {
1791 if_get_master_linkinfo_attr(data, attr);
1792 data->pending = false;
1793 break;
1794 }
1795
1796 attr = RTA_NEXT(attr, rem);
1797 }
1798
1799 return NL_OK;
1800 }
1801
1802 static int cb_if_get_master_ack(struct nl_msg *msg, void *arg)
1803 {
1804 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1805 data->pending = false;
1806
1807 return NL_STOP;
1808 }
1809
1810 static int cb_if_get_master_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1811 {
1812 struct if_get_master_data *data = (struct if_get_master_data *)arg;
1813 data->pending = false;
1814
1815 return NL_STOP;
1816 }
1817
1818 static int system_if_get_master_ifindex(struct device *dev)
1819 {
1820 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1821 struct nl_msg *msg;
1822 struct ifinfomsg ifi = {
1823 .ifi_family = AF_UNSPEC,
1824 .ifi_index = 0,
1825 };
1826 struct if_get_master_data data = {
1827 .ifindex = if_nametoindex(dev->ifname),
1828 .master_ifindex = -1,
1829 .pending = true,
1830 };
1831 int ret = -1;
1832
1833 if (!cb)
1834 return ret;
1835
1836 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
1837 if (!msg)
1838 goto out;
1839
1840 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1841 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1842 goto free;
1843
1844 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_get_master_valid, &data);
1845 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_get_master_ack, &data);
1846 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_get_master_error, &data);
1847
1848 ret = nl_send_auto_complete(sock_rtnl, msg);
1849 if (ret < 0)
1850 goto free;
1851
1852 while (data.pending)
1853 nl_recvmsgs(sock_rtnl, cb);
1854
1855 if (data.master_ifindex >= 0)
1856 ret = data.master_ifindex;
1857
1858 free:
1859 nlmsg_free(msg);
1860 out:
1861 nl_cb_put(cb);
1862 return ret;
1863 }
1864
1865 static void system_refresh_orig_macaddr(struct device *dev, struct device_settings *s)
1866 {
1867 struct ifreq ifr;
1868
1869 memset(&ifr, 0, sizeof(ifr));
1870 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1871
1872 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0)
1873 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1874 }
1875
1876 static void system_set_master(struct device *dev, int master_ifindex)
1877 {
1878 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
1879 struct nl_msg *nlm;
1880
1881 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1882 if (!nlm)
1883 return;
1884
1885 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
1886 nla_put_string(nlm, IFLA_IFNAME, dev->ifname);
1887
1888 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
1889 if (!linkinfo)
1890 goto failure;
1891
1892 nla_put_string(nlm, IFLA_INFO_KIND, "dsa");
1893 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
1894 if (!infodata)
1895 goto failure;
1896
1897 nla_put_u32(nlm, IFLA_DSA_MASTER, master_ifindex);
1898
1899 nla_nest_end(nlm, infodata);
1900 nla_nest_end(nlm, linkinfo);
1901
1902 system_rtnl_call(nlm);
1903
1904 return;
1905
1906 failure:
1907 nlmsg_free(nlm);
1908 }
1909 #endif
1910
1911 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1912 {
1913 if (nr < 0)
1914 return;
1915
1916 if (nr >= (nwords * 32))
1917 return;
1918
1919 mask[nr / 32] &= ~(1U << (nr % 32));
1920 }
1921
1922 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1923 {
1924 if (nr < 0)
1925 return false;
1926
1927 if (nr >= (nwords * 32))
1928 return false;
1929
1930 return !!(mask[nr / 32] & (1U << (nr % 32)));
1931 }
1932
1933 static int
1934 system_get_ethtool_gro(struct device *dev)
1935 {
1936 struct ethtool_value ecmd;
1937 struct ifreq ifr = {
1938 .ifr_data = (caddr_t)&ecmd,
1939 };
1940
1941 memset(&ecmd, 0, sizeof(ecmd));
1942 ecmd.cmd = ETHTOOL_GGRO;
1943 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1944
1945 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1946 return -1;
1947
1948 return ecmd.data;
1949 }
1950
1951 static void
1952 system_set_ethtool_gro(struct device *dev, struct device_settings *s)
1953 {
1954 struct ethtool_value ecmd;
1955 struct ifreq ifr = {
1956 .ifr_data = (caddr_t)&ecmd,
1957 };
1958
1959 memset(&ecmd, 0, sizeof(ecmd));
1960 ecmd.cmd = ETHTOOL_SGRO;
1961 ecmd.data = s->gro;
1962 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1963
1964 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1965 }
1966
1967 static void
1968 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1969 {
1970 struct ethtool_pauseparam pp;
1971 struct ifreq ifr = {
1972 .ifr_data = (caddr_t)&pp,
1973 };
1974
1975 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1976 memset(&pp, 0, sizeof(pp));
1977 pp.cmd = ETHTOOL_GPAUSEPARAM;
1978 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1979 return;
1980
1981 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1982 pp.autoneg = AUTONEG_DISABLE;
1983
1984 if (s->flags & DEV_OPT_PAUSE) {
1985 if (s->flags & DEV_OPT_RXPAUSE)
1986 pp.rx_pause = s->rxpause && s->pause;
1987 else
1988 pp.rx_pause = s->pause;
1989
1990 if (s->flags & DEV_OPT_TXPAUSE)
1991 pp.tx_pause = s->txpause && s->pause;
1992 else
1993 pp.tx_pause = s->pause;
1994 } else {
1995 if (s->flags & DEV_OPT_RXPAUSE)
1996 pp.rx_pause = s->rxpause;
1997
1998 if (s->flags & DEV_OPT_TXPAUSE)
1999 pp.tx_pause = s->txpause;
2000 }
2001
2002 if (s->flags & DEV_OPT_ASYM_PAUSE &&
2003 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
2004 pp.rx_pause = pp.tx_pause = false;
2005 } else {
2006 pp.autoneg = AUTONEG_ENABLE;
2007 /* Pause and Asym_Pause advertising bits will be set via
2008 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
2009 */
2010 }
2011
2012 pp.cmd = ETHTOOL_SPAUSEPARAM;
2013 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2014 }
2015
2016 static void
2017 system_set_ethtool_eee_settings(struct device *dev, struct device_settings *s)
2018 {
2019 struct ethtool_eee eeecmd;
2020 struct ifreq ifr = {
2021 .ifr_data = (caddr_t)&eeecmd,
2022 };
2023
2024 memset(&eeecmd, 0, sizeof(eeecmd));
2025 eeecmd.cmd = ETHTOOL_SEEE;
2026 eeecmd.eee_enabled = s->eee;
2027 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2028
2029 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2030 netifd_log_message(L_WARNING, "cannot set eee %d for device %s", s->eee, dev->ifname);
2031 }
2032
2033 static void
2034 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
2035 {
2036 struct {
2037 struct ethtool_link_settings req;
2038 __u32 link_mode_data[3 * 127];
2039 } ecmd;
2040 struct ifreq ifr = {
2041 .ifr_data = (caddr_t)&ecmd,
2042 };
2043 size_t i;
2044 __s8 nwords;
2045 __u32 *supported, *advertising;
2046
2047 system_set_ethtool_pause(dev, s);
2048
2049 if (s->flags & DEV_OPT_EEE)
2050 system_set_ethtool_eee_settings(dev, s);
2051
2052 memset(&ecmd, 0, sizeof(ecmd));
2053 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2054 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2055
2056 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2057 ecmd.req.link_mode_masks_nwords >= 0 ||
2058 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2059 return;
2060
2061 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2062
2063 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2064 ecmd.req.link_mode_masks_nwords <= 0 ||
2065 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2066 return;
2067
2068 nwords = ecmd.req.link_mode_masks_nwords;
2069 supported = &ecmd.link_mode_data[0];
2070 advertising = &ecmd.link_mode_data[nwords];
2071 memcpy(advertising, supported, sizeof(__u32) * nwords);
2072
2073 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2074 if (s->flags & DEV_OPT_DUPLEX) {
2075 if (s->duplex)
2076 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2077 else
2078 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2079 }
2080 if (!(s->flags & DEV_OPT_SPEED) ||
2081 s->speed == ethtool_modes[i].speed)
2082 continue;
2083
2084 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
2085 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
2086 }
2087
2088 if (s->flags & DEV_OPT_PAUSE)
2089 if (!s->pause)
2090 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
2091
2092 if (s->flags & DEV_OPT_ASYM_PAUSE)
2093 if (!s->asym_pause)
2094 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
2095
2096 if (s->flags & DEV_OPT_AUTONEG) {
2097 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
2098 if (!s->autoneg) {
2099 if (s->flags & DEV_OPT_SPEED)
2100 ecmd.req.speed = s->speed;
2101
2102 if (s->flags & DEV_OPT_DUPLEX)
2103 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
2104 }
2105 }
2106
2107 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
2108 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
2109 }
2110
2111 static void
2112 system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s)
2113 {
2114 if (s->flags & DEV_OPT_GRO)
2115 system_set_ethtool_gro(dev, s);
2116 }
2117
2118 void
2119 system_if_get_settings(struct device *dev, struct device_settings *s)
2120 {
2121 struct ifreq ifr;
2122 char buf[10];
2123 int ret;
2124
2125 memset(&ifr, 0, sizeof(ifr));
2126 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2127
2128 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
2129 s->mtu = ifr.ifr_mtu;
2130 s->flags |= DEV_OPT_MTU;
2131 }
2132
2133 s->mtu6 = system_update_ipv6_mtu(dev, 0);
2134 if (s->mtu6 > 0)
2135 s->flags |= DEV_OPT_MTU6;
2136
2137 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
2138 s->txqueuelen = ifr.ifr_qlen;
2139 s->flags |= DEV_OPT_TXQUEUELEN;
2140 }
2141
2142 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
2143 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
2144 s->flags |= DEV_OPT_MACADDR;
2145 }
2146
2147 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
2148 s->ipv6 = !strtoul(buf, NULL, 0);
2149 s->flags |= DEV_OPT_IPV6;
2150 }
2151
2152 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
2153 s->ip6segmentrouting = strtoul(buf, NULL, 0);
2154 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
2155 }
2156
2157 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
2158 s->promisc = ifr.ifr_flags & IFF_PROMISC;
2159 s->flags |= DEV_OPT_PROMISC;
2160
2161 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
2162 s->flags |= DEV_OPT_MULTICAST;
2163 }
2164
2165 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
2166 s->rpfilter = strtoul(buf, NULL, 0);
2167 s->flags |= DEV_OPT_RPFILTER;
2168 }
2169
2170 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
2171 s->acceptlocal = strtoul(buf, NULL, 0);
2172 s->flags |= DEV_OPT_ACCEPTLOCAL;
2173 }
2174
2175 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
2176 s->igmpversion = strtoul(buf, NULL, 0);
2177 s->flags |= DEV_OPT_IGMPVERSION;
2178 }
2179
2180 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
2181 s->mldversion = strtoul(buf, NULL, 0);
2182 s->flags |= DEV_OPT_MLDVERSION;
2183 }
2184
2185 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
2186 s->neigh4reachabletime = strtoul(buf, NULL, 0);
2187 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2188 }
2189
2190 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
2191 s->neigh6reachabletime = strtoul(buf, NULL, 0);
2192 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
2193 }
2194
2195 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
2196 s->neigh4locktime = strtol(buf, NULL, 0);
2197 s->flags |= DEV_OPT_NEIGHLOCKTIME;
2198 }
2199
2200 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
2201 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
2202 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2203 }
2204
2205 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
2206 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
2207 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
2208 }
2209
2210 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
2211 s->dadtransmits = strtoul(buf, NULL, 0);
2212 s->flags |= DEV_OPT_DADTRANSMITS;
2213 }
2214
2215 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
2216 s->sendredirects = strtoul(buf, NULL, 0);
2217 s->flags |= DEV_OPT_SENDREDIRECTS;
2218 }
2219
2220 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2221 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2222 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
2223 }
2224
2225 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
2226 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
2227 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
2228 }
2229
2230 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
2231 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
2232 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
2233 }
2234
2235 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
2236 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
2237 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
2238 }
2239
2240 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
2241 s->arp_accept = strtoul(buf, NULL, 0);
2242 s->flags |= DEV_OPT_ARP_ACCEPT;
2243 }
2244
2245 ret = system_get_ethtool_gro(dev);
2246 if (ret >= 0) {
2247 s->gro = ret;
2248 s->flags |= DEV_OPT_GRO;
2249 }
2250
2251 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2252 ret = system_if_get_master_ifindex(dev);
2253 if (ret >= 0) {
2254 s->master_ifindex = ret;
2255 s->flags |= DEV_OPT_MASTER;
2256 }
2257 #endif
2258 }
2259
2260 void
2261 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
2262 {
2263 struct ifreq ifr;
2264 char buf[12];
2265
2266 apply_mask &= s->flags;
2267
2268 if (apply_mask & DEV_OPT_MASTER) {
2269 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0)
2270 system_set_master(dev, s->master_ifindex);
2271 if (!(apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) || dev->external)
2272 system_refresh_orig_macaddr(dev, &dev->orig_settings);
2273 #else
2274 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 6.1.0, changing DSA port conduit is not supported!", dev->ifname);
2275 #endif
2276 }
2277
2278 memset(&ifr, 0, sizeof(ifr));
2279 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2280 if (apply_mask & DEV_OPT_MTU) {
2281 ifr.ifr_mtu = s->mtu;
2282 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2283 s->flags &= ~DEV_OPT_MTU;
2284 }
2285 if (apply_mask & DEV_OPT_MTU6) {
2286 system_update_ipv6_mtu(dev, s->mtu6);
2287 }
2288 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2289 ifr.ifr_qlen = s->txqueuelen;
2290 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2291 s->flags &= ~DEV_OPT_TXQUEUELEN;
2292 }
2293 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2294 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2295 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2296 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2297 s->flags &= ~DEV_OPT_MACADDR;
2298 }
2299 if (apply_mask & DEV_OPT_IPV6)
2300 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2301 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2302 struct device dummy = {
2303 .ifname = "all",
2304 };
2305 bool ip6segmentrouting = device_check_ip6segmentrouting();
2306
2307 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2308 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2309 }
2310 if (apply_mask & DEV_OPT_PROMISC) {
2311 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2312 !s->promisc ? IFF_PROMISC : 0) < 0)
2313 s->flags &= ~DEV_OPT_PROMISC;
2314 }
2315 if (apply_mask & DEV_OPT_RPFILTER) {
2316 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2317 system_set_rpfilter(dev, buf);
2318 }
2319 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2320 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2321 if (apply_mask & DEV_OPT_IGMPVERSION) {
2322 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2323 system_set_igmpversion(dev, buf);
2324 }
2325 if (apply_mask & DEV_OPT_MLDVERSION) {
2326 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2327 system_set_mldversion(dev, buf);
2328 }
2329 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2330 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2331 system_set_neigh4reachabletime(dev, buf);
2332 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2333 system_set_neigh6reachabletime(dev, buf);
2334 }
2335 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2336 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2337 system_set_neigh4locktime(dev, buf);
2338 }
2339 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2340 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2341 system_set_neigh4gcstaletime(dev, buf);
2342 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2343 system_set_neigh6gcstaletime(dev, buf);
2344 }
2345 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2346 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2347 system_set_dadtransmits(dev, buf);
2348 }
2349 if (apply_mask & DEV_OPT_MULTICAST) {
2350 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2351 !s->multicast ? IFF_MULTICAST : 0) < 0)
2352 s->flags &= ~DEV_OPT_MULTICAST;
2353 }
2354 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2355 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2356 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2357 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2358 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2359 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2360 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2361 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2362 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2363 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2364 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2365 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2366 system_set_ethtool_settings(dev, s);
2367 }
2368
2369 void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s)
2370 {
2371 system_set_ethtool_settings_after_up(dev, s);
2372 }
2373
2374 int system_if_up(struct device *dev)
2375 {
2376 return system_if_flags(dev->ifname, IFF_UP, 0);
2377 }
2378
2379 int system_if_down(struct device *dev)
2380 {
2381 return system_if_flags(dev->ifname, 0, IFF_UP);
2382 }
2383
2384 struct if_check_data {
2385 struct device *dev;
2386 int pending;
2387 int ret;
2388 };
2389
2390 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2391 {
2392 struct nlmsghdr *nh = nlmsg_hdr(msg);
2393 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2394 struct if_check_data *chk = (struct if_check_data *)arg;
2395
2396 if (nh->nlmsg_type != RTM_NEWLINK)
2397 return NL_SKIP;
2398
2399 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2400 return NL_OK;
2401 }
2402
2403 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2404 {
2405 struct if_check_data *chk = (struct if_check_data *)arg;
2406 chk->pending = 0;
2407 return NL_STOP;
2408 }
2409
2410 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2411 {
2412 struct if_check_data *chk = (struct if_check_data *)arg;
2413
2414 if (chk->dev->type == &simple_device_type)
2415 device_set_present(chk->dev, false);
2416 device_set_link(chk->dev, false);
2417 chk->pending = err->error;
2418
2419 return NL_STOP;
2420 }
2421
2422 struct bridge_vlan_check_data {
2423 struct device *check_dev;
2424 int ifindex;
2425 int ret;
2426 bool pending;
2427 };
2428
2429 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2430 struct bridge_vlan_port *port,
2431 struct bridge_vlan_info *vinfo)
2432 {
2433 uint16_t flags = 0, diff, mask;
2434
2435 if (port->flags & BRVLAN_F_PVID)
2436 flags |= BRIDGE_VLAN_INFO_PVID;
2437 if (port->flags & BRVLAN_F_UNTAGGED)
2438 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2439
2440 diff = vinfo->flags ^ flags;
2441 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2442 if (diff & mask) {
2443 data->ret = 1;
2444 data->pending = false;
2445 }
2446
2447 port->check = 1;
2448 }
2449
2450 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2451 struct rtattr *attr)
2452 {
2453 struct bridge_vlan_hotplug_port *port;
2454 struct bridge_vlan_info *vinfo;
2455 struct bridge_vlan *vlan;
2456 struct rtattr *cur;
2457 int rem = RTA_PAYLOAD(attr);
2458 int i;
2459
2460 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2461 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2462 continue;
2463
2464 vinfo = RTA_DATA(cur);
2465 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2466 if (!vlan) {
2467 data->ret = 1;
2468 data->pending = false;
2469 return;
2470 }
2471
2472 for (i = 0; i < vlan->n_ports; i++)
2473 if (!vlan->ports[i].check)
2474 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2475
2476 list_for_each_entry(port, &vlan->hotplug_ports, list)
2477 if (!port->port.check)
2478 bridge_vlan_check_port(data, &port->port, vinfo);
2479 }
2480 }
2481
2482 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2483 {
2484 struct bridge_vlan_check_data *data = arg;
2485 struct nlmsghdr *nh = nlmsg_hdr(msg);
2486 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2487 struct rtattr *attr;
2488 int rem;
2489
2490 if (nh->nlmsg_type != RTM_NEWLINK)
2491 return NL_SKIP;
2492
2493 if (ifi->ifi_family != AF_BRIDGE)
2494 return NL_SKIP;
2495
2496 if (ifi->ifi_index != data->ifindex)
2497 return NL_SKIP;
2498
2499 attr = IFLA_RTA(ifi);
2500 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2501 while (RTA_OK(attr, rem)) {
2502 if (attr->rta_type == IFLA_AF_SPEC)
2503 bridge_vlan_check_attr(data, attr);
2504
2505 attr = RTA_NEXT(attr, rem);
2506 }
2507
2508 return NL_SKIP;
2509 }
2510
2511 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2512 {
2513 struct bridge_vlan_check_data *data = arg;
2514 data->pending = false;
2515 return NL_STOP;
2516 }
2517
2518 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2519 {
2520 struct bridge_vlan_check_data *data = arg;
2521 data->pending = false;
2522 return NL_STOP;
2523 }
2524
2525 int system_bridge_vlan_check(struct device *dev, char *ifname)
2526 {
2527 struct bridge_vlan_check_data data = {
2528 .check_dev = dev,
2529 .ifindex = if_nametoindex(ifname),
2530 .ret = -1,
2531 .pending = true,
2532 };
2533 static struct ifinfomsg ifi = {
2534 .ifi_family = AF_BRIDGE
2535 };
2536 static struct rtattr ext_req = {
2537 .rta_type = IFLA_EXT_MASK,
2538 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2539 };
2540 uint32_t filter = RTEXT_FILTER_BRVLAN;
2541 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2542 struct bridge_vlan *vlan;
2543 struct nl_msg *msg;
2544 int i;
2545
2546 if (!data.ifindex)
2547 return 0;
2548
2549 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2550
2551 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2552 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2553 nlmsg_append(msg, &filter, sizeof(filter), 0))
2554 goto free;
2555
2556 vlist_for_each_element(&dev->vlans, vlan, node) {
2557 struct bridge_vlan_hotplug_port *port;
2558
2559 for (i = 0; i < vlan->n_ports; i++) {
2560 if (!strcmp(vlan->ports[i].ifname, ifname))
2561 vlan->ports[i].check = 0;
2562 else
2563 vlan->ports[i].check = -1;
2564 }
2565
2566 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2567 if (!strcmp(port->port.ifname, ifname))
2568 port->port.check = 0;
2569 else
2570 port->port.check = -1;
2571 }
2572 }
2573
2574 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2575 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2576 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2577 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2578
2579 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2580 goto free;
2581
2582 data.ret = 0;
2583 while (data.pending)
2584 nl_recvmsgs(sock_rtnl, cb);
2585
2586 vlist_for_each_element(&dev->vlans, vlan, node) {
2587 struct bridge_vlan_hotplug_port *port;
2588
2589 for (i = 0; i < vlan->n_ports; i++) {
2590 if (!vlan->ports[i].check) {
2591 data.ret = 1;
2592 break;
2593 }
2594 }
2595
2596 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2597 if (!port->port.check) {
2598 data.ret = 1;
2599 break;
2600 }
2601 }
2602 }
2603
2604 free:
2605 nlmsg_free(msg);
2606 nl_cb_put(cb);
2607 return data.ret;
2608 }
2609
2610 int system_if_check(struct device *dev)
2611 {
2612 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2613 struct nl_msg *msg;
2614 struct ifinfomsg ifi = {
2615 .ifi_family = AF_UNSPEC,
2616 .ifi_index = 0,
2617 };
2618 struct if_check_data chk = {
2619 .dev = dev,
2620 .pending = 1,
2621 };
2622 int ret = 1;
2623
2624 if (!cb)
2625 return ret;
2626
2627 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2628 if (!msg)
2629 goto out;
2630
2631 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2632 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2633 goto free;
2634
2635 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2636 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2637 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2638
2639 ret = nl_send_auto_complete(sock_rtnl, msg);
2640 if (ret < 0)
2641 goto free;
2642
2643 while (chk.pending > 0)
2644 nl_recvmsgs(sock_rtnl, cb);
2645
2646 ret = chk.pending;
2647
2648 free:
2649 nlmsg_free(msg);
2650 out:
2651 nl_cb_put(cb);
2652 return ret;
2653 }
2654
2655 struct device *
2656 system_if_get_parent(struct device *dev)
2657 {
2658 char buf[64], *devname;
2659 int ifindex, iflink;
2660
2661 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2662 return NULL;
2663
2664 iflink = strtoul(buf, NULL, 0);
2665 ifindex = system_if_resolve(dev);
2666 if (!iflink || iflink == ifindex)
2667 return NULL;
2668
2669 devname = if_indextoname(iflink, buf);
2670 if (!devname)
2671 return NULL;
2672
2673 return device_get(devname, true);
2674 }
2675
2676 static bool
2677 read_string_file(int dir_fd, const char *file, char *buf, int len)
2678 {
2679 bool ret = false;
2680 char *c;
2681 int fd;
2682
2683 fd = openat(dir_fd, file, O_RDONLY);
2684 if (fd < 0)
2685 return false;
2686
2687 retry:
2688 len = read(fd, buf, len - 1);
2689 if (len < 0) {
2690 if (errno == EINTR)
2691 goto retry;
2692 } else if (len > 0) {
2693 buf[len] = 0;
2694
2695 c = strchr(buf, '\n');
2696 if (c)
2697 *c = 0;
2698
2699 ret = true;
2700 }
2701
2702 close(fd);
2703
2704 return ret;
2705 }
2706
2707 static bool
2708 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2709 {
2710 char buf[64];
2711 bool ret = false;
2712
2713 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2714 if (ret)
2715 *val = strtoull(buf, NULL, 0);
2716
2717 return ret;
2718 }
2719
2720 bool
2721 system_if_force_external(const char *ifname)
2722 {
2723 struct stat s;
2724
2725 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2726 }
2727
2728 static const char *
2729 system_netdevtype_name(unsigned short dev_type)
2730 {
2731 size_t i;
2732
2733 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2734 if (netdev_types[i].id == dev_type)
2735 return netdev_types[i].name;
2736 }
2737
2738 /* the last key is used by default */
2739 i = ARRAY_SIZE(netdev_types) - 1;
2740
2741 return netdev_types[i].name;
2742 }
2743
2744 static void
2745 system_add_devtype(struct blob_buf *b, const char *ifname)
2746 {
2747 char buf[100];
2748 bool found = false;
2749
2750 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2751 const char *info = "DEVTYPE=";
2752 char *context = NULL;
2753 const char *line = strtok_r(buf, "\r\n", &context);
2754
2755 while (line != NULL) {
2756 char *index = strstr(line, info);
2757
2758 if (index != NULL) {
2759 blobmsg_add_string(b, "devtype", index + strlen(info));
2760 found = true;
2761 break;
2762 }
2763
2764 line = strtok_r(NULL, "\r\n", &context);
2765 }
2766 }
2767
2768 if (!found) {
2769 unsigned short number = 0;
2770 const char *name = NULL;
2771
2772 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2773 number = strtoul(buf, NULL, 0);
2774 name = system_netdevtype_name(number);
2775 blobmsg_add_string(b, "devtype", name);
2776 }
2777 }
2778 }
2779
2780 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2781
2782 static int32_t
2783 ethtool_feature_count(const char *ifname)
2784 {
2785 struct {
2786 struct ethtool_sset_info hdr;
2787 uint32_t buf;
2788 } req = {
2789 .hdr = {
2790 .cmd = ETHTOOL_GSSET_INFO,
2791 .sset_mask = 1 << ETH_SS_FEATURES
2792 }
2793 };
2794
2795 struct ifreq ifr = {
2796 .ifr_data = (void *)&req
2797 };
2798
2799 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2800
2801 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2802 return -1;
2803
2804 if (!req.hdr.sset_mask)
2805 return 0;
2806
2807 return req.buf;
2808 }
2809
2810 static int32_t
2811 ethtool_feature_index(const char *ifname, const char *keyname)
2812 {
2813 struct ethtool_gstrings *feature_names;
2814 struct ifreq ifr = { 0 };
2815 int32_t n_features;
2816 uint32_t i;
2817
2818 n_features = ethtool_feature_count(ifname);
2819
2820 if (n_features <= 0)
2821 return -1;
2822
2823 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2824
2825 if (!feature_names)
2826 return -1;
2827
2828 feature_names->cmd = ETHTOOL_GSTRINGS;
2829 feature_names->string_set = ETH_SS_FEATURES;
2830 feature_names->len = n_features;
2831
2832 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2833 ifr.ifr_data = (void *)feature_names;
2834
2835 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2836 free(feature_names);
2837
2838 return -1;
2839 }
2840
2841 for (i = 0; i < feature_names->len; i++)
2842 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2843 break;
2844
2845 if (i >= feature_names->len)
2846 i = -1;
2847
2848 free(feature_names);
2849
2850 return i;
2851 }
2852
2853 static bool
2854 ethtool_feature_value(const char *ifname, const char *keyname)
2855 {
2856 struct ethtool_get_features_block *feature_block;
2857 struct ethtool_gfeatures *feature_values;
2858 struct ifreq ifr = { 0 };
2859 int32_t feature_idx;
2860 bool active;
2861
2862 feature_idx = ethtool_feature_index(ifname, keyname);
2863
2864 if (feature_idx < 0)
2865 return false;
2866
2867 feature_values = calloc(1,
2868 sizeof(*feature_values) +
2869 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2870
2871 if (!feature_values)
2872 return false;
2873
2874 feature_values->cmd = ETHTOOL_GFEATURES;
2875 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2876
2877 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2878 ifr.ifr_data = (void *)feature_values;
2879
2880 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2881 free(feature_values);
2882
2883 return false;
2884 }
2885
2886 feature_block = &feature_values->features[feature_idx / 32];
2887 active = feature_block->active & (1U << feature_idx % 32);
2888
2889 free(feature_values);
2890
2891 return active;
2892 }
2893
2894 static void
2895 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2896 {
2897 char *buf;
2898
2899 /* allocate string buffer large enough for the mode name and a suffix
2900 * "-F" or "-H" indicating full duplex or half duplex.
2901 */
2902 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2903 if (!buf)
2904 return;
2905
2906 strcpy(buf, ethtool_modes[i].name);
2907 if (half)
2908 strcat(buf, "-H");
2909 else
2910 strcat(buf, "-F");
2911
2912 blobmsg_add_string_buffer(b);
2913 }
2914
2915 static void
2916 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2917 {
2918 size_t i;
2919
2920 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2921 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2922 system_add_link_mode_name(b, i, true);
2923
2924 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2925 system_add_link_mode_name(b, i, false);
2926 }
2927 }
2928
2929 static void
2930 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2931 {
2932 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2933 blobmsg_add_string(b, NULL, "pause");
2934
2935 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2936 blobmsg_add_string(b, NULL, "asym_pause");
2937 }
2938
2939
2940 static void
2941 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2942 __u32 *advertising, __u32 *lp_advertising)
2943 {
2944 bool an_rx = false, an_tx = false;
2945 void *d;
2946
2947 d = blobmsg_open_array(b, "negotiated");
2948
2949 /* Work out negotiated pause frame usage per
2950 * IEEE 802.3-2005 table 28B-3.
2951 */
2952 if (ethtool_link_mode_test_bit(nwords,
2953 ETHTOOL_LINK_MODE_Pause_BIT,
2954 advertising) &&
2955 ethtool_link_mode_test_bit(nwords,
2956 ETHTOOL_LINK_MODE_Pause_BIT,
2957 lp_advertising)) {
2958 an_tx = true;
2959 an_rx = true;
2960 } else if (ethtool_link_mode_test_bit(nwords,
2961 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2962 advertising) &&
2963 ethtool_link_mode_test_bit(nwords,
2964 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2965 lp_advertising)) {
2966 if (ethtool_link_mode_test_bit(nwords,
2967 ETHTOOL_LINK_MODE_Pause_BIT,
2968 advertising))
2969 an_rx = true;
2970 else if (ethtool_link_mode_test_bit(nwords,
2971 ETHTOOL_LINK_MODE_Pause_BIT,
2972 lp_advertising))
2973 an_tx = true;
2974 }
2975 if (an_tx)
2976 blobmsg_add_string(b, NULL, "rx");
2977
2978 if (an_rx)
2979 blobmsg_add_string(b, NULL, "tx");
2980
2981 blobmsg_close_array(b, d);
2982 }
2983
2984 static void
2985 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2986 {
2987 struct ethtool_pauseparam pp;
2988 struct ifreq ifr = {
2989 .ifr_data = (caddr_t)&pp,
2990 };
2991
2992 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2993 memset(&pp, 0, sizeof(pp));
2994 pp.cmd = ETHTOOL_GPAUSEPARAM;
2995
2996 /* may fail */
2997 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2998 *pause_autoneg = true;
2999 return;
3000 }
3001
3002 *rx_pause = pp.rx_pause;
3003 *tx_pause = pp.tx_pause;
3004 *pause_autoneg = pp.autoneg;
3005 }
3006
3007 int
3008 system_if_dump_info(struct device *dev, struct blob_buf *b)
3009 {
3010 __u32 *supported, *advertising, *lp_advertising;
3011 bool rx_pause, tx_pause, pause_autoneg;
3012 struct {
3013 struct ethtool_link_settings req;
3014 __u32 link_mode_data[3 * 127];
3015 } ecmd;
3016 struct ifreq ifr = {
3017 .ifr_data = (caddr_t)&ecmd,
3018 };
3019 __s8 nwords;
3020 void *c, *d;
3021 char *s;
3022
3023 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
3024
3025 memset(&ecmd, 0, sizeof(ecmd));
3026 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
3027 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
3028
3029 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3030 ecmd.req.link_mode_masks_nwords >= 0 ||
3031 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3032 return -EOPNOTSUPP;
3033
3034 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
3035
3036 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
3037 ecmd.req.link_mode_masks_nwords <= 0 ||
3038 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
3039 return -EIO;
3040
3041 nwords = ecmd.req.link_mode_masks_nwords;
3042 supported = &ecmd.link_mode_data[0];
3043 advertising = &ecmd.link_mode_data[nwords];
3044 lp_advertising = &ecmd.link_mode_data[2 * nwords];
3045
3046 c = blobmsg_open_array(b, "link-advertising");
3047 system_add_link_modes(nwords, b, advertising);
3048 blobmsg_close_array(b, c);
3049
3050 c = blobmsg_open_array(b, "link-partner-advertising");
3051 system_add_link_modes(nwords, b, lp_advertising);
3052 blobmsg_close_array(b, c);
3053
3054 c = blobmsg_open_array(b, "link-supported");
3055 system_add_link_modes(nwords, b, supported);
3056 blobmsg_close_array(b, c);
3057
3058 if (ethtool_validate_speed(ecmd.req.speed) &&
3059 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
3060 (ecmd.req.speed != 0)) {
3061 s = blobmsg_alloc_string_buffer(b, "speed", 10);
3062 snprintf(s, 8, "%d%c", ecmd.req.speed,
3063 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
3064 blobmsg_add_string_buffer(b);
3065 }
3066 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
3067
3068 c = blobmsg_open_table(b, "flow-control");
3069 blobmsg_add_u8(b, "autoneg", pause_autoneg);
3070
3071 d = blobmsg_open_array(b, "supported");
3072 system_add_pause_modes(nwords, b, supported);
3073 blobmsg_close_array(b, d);
3074
3075 if (pause_autoneg) {
3076 d = blobmsg_open_array(b, "link-advertising");
3077 system_add_pause_modes(nwords, b, advertising);
3078 blobmsg_close_array(b, d);
3079 }
3080
3081 d = blobmsg_open_array(b, "link-partner-advertising");
3082 system_add_pause_modes(nwords, b, lp_advertising);
3083 blobmsg_close_array(b, d);
3084
3085 if (pause_autoneg) {
3086 system_add_ethtool_pause_an(b, nwords, advertising,
3087 lp_advertising);
3088 } else {
3089 d = blobmsg_open_array(b, "selected");
3090 if (rx_pause)
3091 blobmsg_add_string(b, NULL, "rx");
3092
3093 if (tx_pause)
3094 blobmsg_add_string(b, NULL, "tx");
3095
3096 blobmsg_close_array(b, d);
3097 }
3098
3099 blobmsg_close_table(b, c);
3100
3101 blobmsg_add_u8(b, "hw-tc-offload",
3102 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
3103
3104 system_add_devtype(b, dev->ifname);
3105
3106 return 0;
3107 }
3108
3109 int
3110 system_if_dump_stats(struct device *dev, struct blob_buf *b)
3111 {
3112 const char *const counters[] = {
3113 "collisions", "rx_frame_errors", "tx_compressed",
3114 "multicast", "rx_length_errors", "tx_dropped",
3115 "rx_bytes", "rx_missed_errors", "tx_errors",
3116 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
3117 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
3118 "rx_dropped", "tx_aborted_errors", "tx_packets",
3119 "rx_errors", "tx_bytes", "tx_window_errors",
3120 "rx_fifo_errors", "tx_carrier_errors",
3121 };
3122 int stats_dir;
3123 size_t i;
3124 uint64_t val = 0;
3125
3126 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
3127 if (stats_dir < 0)
3128 return -1;
3129
3130 for (i = 0; i < ARRAY_SIZE(counters); i++)
3131 if (read_uint64_file(stats_dir, counters[i], &val))
3132 blobmsg_add_u64(b, counters[i], val);
3133
3134 close(stats_dir);
3135 return 0;
3136 }
3137
3138 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
3139 {
3140 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
3141 int alen = v4 ? 4 : 16;
3142 unsigned int flags = 0;
3143 struct ifaddrmsg ifa = {
3144 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
3145 .ifa_prefixlen = addr->mask,
3146 .ifa_index = dev->ifindex,
3147 };
3148
3149 struct nl_msg *msg;
3150 if (cmd == RTM_NEWADDR)
3151 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3152
3153 msg = nlmsg_alloc_simple(cmd, flags);
3154 if (!msg)
3155 return -1;
3156
3157 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
3158 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
3159 if (v4) {
3160 if (addr->broadcast)
3161 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
3162 if (addr->point_to_point)
3163 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
3164 } else {
3165 time_t now = system_get_rtime();
3166 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
3167
3168 if (addr->preferred_until) {
3169 int64_t preferred = addr->preferred_until - now;
3170 if (preferred < 0)
3171 preferred = 0;
3172 else if (preferred > UINT32_MAX)
3173 preferred = UINT32_MAX;
3174
3175 cinfo.ifa_prefered = preferred;
3176 }
3177
3178 if (addr->valid_until) {
3179 int64_t valid = addr->valid_until - now;
3180 if (valid <= 0) {
3181 nlmsg_free(msg);
3182 return -1;
3183 }
3184 else if (valid > UINT32_MAX)
3185 valid = UINT32_MAX;
3186
3187 cinfo.ifa_valid = valid;
3188 }
3189
3190 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
3191
3192 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
3193 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
3194 }
3195
3196 return system_rtnl_call(msg);
3197 }
3198
3199 int system_add_address(struct device *dev, struct device_addr *addr)
3200 {
3201 return system_addr(dev, addr, RTM_NEWADDR);
3202 }
3203
3204 int system_del_address(struct device *dev, struct device_addr *addr)
3205 {
3206 return system_addr(dev, addr, RTM_DELADDR);
3207 }
3208
3209 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
3210 {
3211 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3212 unsigned int flags = 0;
3213 struct ndmsg ndm = {
3214 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
3215 .ndm_ifindex = dev->ifindex,
3216 .ndm_state = NUD_PERMANENT,
3217 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
3218 };
3219 struct nl_msg *msg;
3220
3221 if (cmd == RTM_NEWNEIGH)
3222 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3223
3224 msg = nlmsg_alloc_simple(cmd, flags);
3225
3226 if (!msg)
3227 return -1;
3228
3229 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
3230
3231 nla_put(msg, NDA_DST, alen, &neighbor->addr);
3232 if (neighbor->flags & DEVNEIGH_MAC)
3233 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
3234
3235
3236 return system_rtnl_call(msg);
3237 }
3238
3239 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
3240 {
3241 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
3242 }
3243
3244 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
3245 {
3246 return system_neigh(dev, neighbor, RTM_DELNEIGH);
3247 }
3248
3249 static int system_rt(struct device *dev, struct device_route *route, int cmd)
3250 {
3251 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
3252 bool have_gw;
3253 unsigned int flags = 0;
3254
3255 if (alen == 4)
3256 have_gw = !!route->nexthop.in.s_addr;
3257 else
3258 have_gw = route->nexthop.in6.s6_addr32[0] ||
3259 route->nexthop.in6.s6_addr32[1] ||
3260 route->nexthop.in6.s6_addr32[2] ||
3261 route->nexthop.in6.s6_addr32[3];
3262
3263 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
3264 ? route->table : RT_TABLE_MAIN;
3265
3266 struct rtmsg rtm = {
3267 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3268 .rtm_dst_len = route->mask,
3269 .rtm_src_len = route->sourcemask,
3270 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
3271 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
3272 .rtm_scope = RT_SCOPE_NOWHERE,
3273 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
3274 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
3275 };
3276 struct nl_msg *msg;
3277
3278 if (cmd == RTM_NEWROUTE) {
3279 flags |= NLM_F_CREATE | NLM_F_REPLACE;
3280
3281 if (!dev) { /* Add null-route */
3282 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3283 rtm.rtm_type = RTN_UNREACHABLE;
3284 }
3285 else
3286 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3287 }
3288
3289 if (route->flags & DEVROUTE_TYPE) {
3290 rtm.rtm_type = route->type;
3291 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3292 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3293 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3294 rtm.rtm_table = RT_TABLE_LOCAL;
3295 }
3296
3297 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3298 rtm.rtm_scope = RT_SCOPE_HOST;
3299 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3300 rtm.rtm_type == RTN_ANYCAST) {
3301 rtm.rtm_scope = RT_SCOPE_LINK;
3302 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3303 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3304 rtm.rtm_type == RTN_THROW) {
3305 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3306 dev = NULL;
3307 }
3308 }
3309
3310 if (route->flags & DEVROUTE_NODEV)
3311 dev = NULL;
3312
3313 msg = nlmsg_alloc_simple(cmd, flags);
3314 if (!msg)
3315 return -1;
3316
3317 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3318
3319 if (route->mask)
3320 nla_put(msg, RTA_DST, alen, &route->addr);
3321
3322 if (route->sourcemask) {
3323 if (rtm.rtm_family == AF_INET)
3324 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3325 else
3326 nla_put(msg, RTA_SRC, alen, &route->source);
3327 }
3328
3329 if (route->metric > 0)
3330 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3331
3332 if (have_gw)
3333 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3334
3335 if (dev)
3336 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3337
3338 if (table >= 256)
3339 nla_put_u32(msg, RTA_TABLE, table);
3340
3341 if (route->flags & DEVROUTE_MTU) {
3342 struct nlattr *metrics;
3343
3344 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3345 goto nla_put_failure;
3346
3347 nla_put_u32(msg, RTAX_MTU, route->mtu);
3348
3349 nla_nest_end(msg, metrics);
3350 }
3351
3352 return system_rtnl_call(msg);
3353
3354 nla_put_failure:
3355 nlmsg_free(msg);
3356 return -ENOMEM;
3357 }
3358
3359 int system_add_route(struct device *dev, struct device_route *route)
3360 {
3361 return system_rt(dev, route, RTM_NEWROUTE);
3362 }
3363
3364 int system_del_route(struct device *dev, struct device_route *route)
3365 {
3366 return system_rt(dev, route, RTM_DELROUTE);
3367 }
3368
3369 int system_flush_routes(void)
3370 {
3371 const char *names[] = { "ipv4", "ipv6" };
3372 size_t i;
3373 int fd;
3374
3375 for (i = 0; i < ARRAY_SIZE(names); i++) {
3376 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3377 fd = open(dev_buf, O_WRONLY);
3378 if (fd < 0)
3379 continue;
3380
3381 if (write(fd, "-1", 2)) {}
3382 close(fd);
3383 }
3384 return 0;
3385 }
3386
3387 bool system_resolve_rt_type(const char *type, unsigned int *id)
3388 {
3389 return system_rtn_aton(type, id);
3390 }
3391
3392 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3393 {
3394 FILE *f;
3395 char *e, buf[128];
3396 unsigned int n, proto = 256;
3397 n = strtoul(type, &e, 0);
3398 if (!*e && e != type)
3399 proto = n;
3400 else if (!strcmp(type, "unspec"))
3401 proto = RTPROT_UNSPEC;
3402 else if (!strcmp(type, "kernel"))
3403 proto = RTPROT_KERNEL;
3404 else if (!strcmp(type, "boot"))
3405 proto = RTPROT_BOOT;
3406 else if (!strcmp(type, "static"))
3407 proto = RTPROT_STATIC;
3408 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3409 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3410 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3411 continue;
3412
3413 n = strtoul(e, NULL, 10);
3414 e = strtok(NULL, " \t\n");
3415
3416 if (e && !strcmp(e, type)) {
3417 proto = n;
3418 break;
3419 }
3420 }
3421 fclose(f);
3422 }
3423
3424 if (proto > 255)
3425 return false;
3426
3427 *id = proto;
3428 return true;
3429 }
3430
3431 bool system_resolve_rt_table(const char *name, unsigned int *id)
3432 {
3433 FILE *f;
3434 char *e, buf[128];
3435 unsigned int n, table = RT_TABLE_UNSPEC;
3436
3437 /* first try to parse table as number */
3438 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3439 table = n;
3440
3441 /* handle well known aliases */
3442 else if (!strcmp(name, "default"))
3443 table = RT_TABLE_DEFAULT;
3444 else if (!strcmp(name, "main"))
3445 table = RT_TABLE_MAIN;
3446 else if (!strcmp(name, "local"))
3447 table = RT_TABLE_LOCAL;
3448
3449 /* try to look up name in /etc/iproute2/rt_tables */
3450 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3451 {
3452 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3453 {
3454 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3455 continue;
3456
3457 n = strtoul(e, NULL, 10);
3458 e = strtok(NULL, " \t\n");
3459
3460 if (e && !strcmp(e, name))
3461 {
3462 table = n;
3463 break;
3464 }
3465 }
3466
3467 fclose(f);
3468 }
3469
3470 if (table == RT_TABLE_UNSPEC)
3471 return false;
3472
3473 *id = table;
3474 return true;
3475 }
3476
3477 bool system_is_default_rt_table(unsigned int id)
3478 {
3479 return (id == RT_TABLE_MAIN);
3480 }
3481
3482 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3483 {
3484 char *e;
3485 unsigned int n;
3486
3487 if (!strcmp(filter, "strict"))
3488 n = 1;
3489 else if (!strcmp(filter, "loose"))
3490 n = 2;
3491 else {
3492 n = strtoul(filter, &e, 0);
3493 if (*e || e == filter || n > 2)
3494 return false;
3495 }
3496
3497 *id = n;
3498 return true;
3499 }
3500
3501 static int system_iprule(struct iprule *rule, int cmd)
3502 {
3503 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3504
3505 struct nl_msg *msg;
3506 struct rtmsg rtm = {
3507 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3508 .rtm_protocol = RTPROT_STATIC,
3509 .rtm_scope = RT_SCOPE_UNIVERSE,
3510 .rtm_table = RT_TABLE_UNSPEC,
3511 .rtm_type = RTN_UNSPEC,
3512 .rtm_flags = 0,
3513 };
3514
3515 if (cmd == RTM_NEWRULE)
3516 rtm.rtm_type = RTN_UNICAST;
3517
3518 if (rule->invert)
3519 rtm.rtm_flags |= FIB_RULE_INVERT;
3520
3521 if (rule->flags & IPRULE_SRC)
3522 rtm.rtm_src_len = rule->src_mask;
3523
3524 if (rule->flags & IPRULE_DEST)
3525 rtm.rtm_dst_len = rule->dest_mask;
3526
3527 if (rule->flags & IPRULE_TOS)
3528 rtm.rtm_tos = rule->tos;
3529
3530 if (rule->flags & IPRULE_LOOKUP) {
3531 if (rule->lookup < 256)
3532 rtm.rtm_table = rule->lookup;
3533 }
3534
3535 if (rule->flags & IPRULE_ACTION)
3536 rtm.rtm_type = rule->action;
3537 else if (rule->flags & IPRULE_GOTO)
3538 rtm.rtm_type = FR_ACT_GOTO;
3539 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3540 rtm.rtm_type = FR_ACT_NOP;
3541
3542 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3543
3544 if (!msg)
3545 return -1;
3546
3547 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3548
3549 if (rule->flags & IPRULE_IN)
3550 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3551
3552 if (rule->flags & IPRULE_OUT)
3553 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3554
3555 if (rule->flags & IPRULE_SRC)
3556 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3557
3558 if (rule->flags & IPRULE_DEST)
3559 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3560
3561 if (rule->flags & IPRULE_PRIORITY)
3562 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3563 else if (cmd == RTM_NEWRULE)
3564 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3565
3566 if (rule->flags & IPRULE_FWMARK)
3567 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3568
3569 if (rule->flags & IPRULE_FWMASK)
3570 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3571
3572 if (rule->flags & IPRULE_LOOKUP) {
3573 if (rule->lookup >= 256)
3574 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3575 }
3576
3577 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3578 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3579
3580 if (rule->flags & IPRULE_UIDRANGE) {
3581 struct fib_rule_uid_range uidrange = {
3582 .start = rule->uidrange_start,
3583 .end = rule->uidrange_end
3584 };
3585
3586 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3587 }
3588
3589 if (rule->flags & IPRULE_GOTO)
3590 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3591
3592 return system_rtnl_call(msg);
3593 }
3594
3595 int system_add_iprule(struct iprule *rule)
3596 {
3597 return system_iprule(rule, RTM_NEWRULE);
3598 }
3599
3600 int system_del_iprule(struct iprule *rule)
3601 {
3602 return system_iprule(rule, RTM_DELRULE);
3603 }
3604
3605 int system_flush_iprules(void)
3606 {
3607 int rv = 0;
3608 struct iprule rule;
3609
3610 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3611 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3612
3613 memset(&rule, 0, sizeof(rule));
3614
3615
3616 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3617
3618 rule.priority = 0;
3619 rule.lookup = RT_TABLE_LOCAL;
3620 rv |= system_iprule(&rule, RTM_NEWRULE);
3621
3622 rule.priority = 32766;
3623 rule.lookup = RT_TABLE_MAIN;
3624 rv |= system_iprule(&rule, RTM_NEWRULE);
3625
3626 rule.priority = 32767;
3627 rule.lookup = RT_TABLE_DEFAULT;
3628 rv |= system_iprule(&rule, RTM_NEWRULE);
3629
3630
3631 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3632
3633 rule.priority = 0;
3634 rule.lookup = RT_TABLE_LOCAL;
3635 rv |= system_iprule(&rule, RTM_NEWRULE);
3636
3637 rule.priority = 32766;
3638 rule.lookup = RT_TABLE_MAIN;
3639 rv |= system_iprule(&rule, RTM_NEWRULE);
3640
3641 return rv;
3642 }
3643
3644 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3645 {
3646 return system_rtn_aton(action, id);
3647 }
3648
3649 time_t system_get_rtime(void)
3650 {
3651 struct timespec ts;
3652 struct timeval tv;
3653
3654 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3655 return ts.tv_sec;
3656
3657 if (gettimeofday(&tv, NULL) == 0)
3658 return tv.tv_sec;
3659
3660 return 0;
3661 }
3662
3663 #ifndef IP_DF
3664 #define IP_DF 0x4000
3665 #endif
3666
3667 static int tunnel_ioctl(const char *name, int cmd, void *p)
3668 {
3669 struct ifreq ifr;
3670
3671 memset(&ifr, 0, sizeof(ifr));
3672 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3673 ifr.ifr_ifru.ifru_data = p;
3674 return ioctl(sock_ioctl, cmd, &ifr);
3675 }
3676
3677 #ifdef IFLA_IPTUN_MAX
3678 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3679 struct blob_attr **tb)
3680 {
3681 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3682 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3683 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3684 struct blob_attr *cur;
3685 int ret = 0, ttl = 0;
3686
3687 if (!nlm)
3688 return -1;
3689
3690 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3691 nla_put_string(nlm, IFLA_IFNAME, name);
3692
3693 if (link)
3694 nla_put_u32(nlm, IFLA_LINK, link);
3695
3696 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3697 if (!linkinfo) {
3698 ret = -ENOMEM;
3699 goto failure;
3700 }
3701
3702 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3703 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3704 if (!infodata) {
3705 ret = -ENOMEM;
3706 goto failure;
3707 }
3708
3709 if (link)
3710 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3711
3712 if ((cur = tb[TUNNEL_ATTR_TTL]))
3713 ttl = blobmsg_get_u32(cur);
3714
3715 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3716 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3717
3718 struct in6_addr in6buf;
3719 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3720 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3721 ret = -EINVAL;
3722 goto failure;
3723 }
3724 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3725 }
3726
3727 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3728 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3729 ret = -EINVAL;
3730 goto failure;
3731 }
3732 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3733 }
3734
3735 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3736 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3737 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3738
3739 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3740 blobmsg_data(cur), blobmsg_len(cur));
3741
3742 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3743 char *str = blobmsg_get_string(cur);
3744
3745 if (strcmp(str, "ignore")) {
3746 char *e;
3747 unsigned encap_limit = strtoul(str, &e, 0);
3748
3749 if (e == str || *e || encap_limit > 255) {
3750 ret = -EINVAL;
3751 goto failure;
3752 }
3753
3754 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3755 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3756 }
3757 }
3758
3759 #ifdef IFLA_IPTUN_FMR_MAX
3760 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3761 struct blob_attr *rcur;
3762 unsigned rrem, fmrcnt = 0;
3763 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3764
3765 if (!fmrs) {
3766 ret = -ENOMEM;
3767 goto failure;
3768 }
3769
3770 blobmsg_for_each_attr(rcur, cur, rrem) {
3771 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3772 struct in6_addr ip6prefix;
3773 struct in_addr ip4prefix;
3774 unsigned ip4len, ip6len, ealen, offset;
3775
3776 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3777 blobmsg_data(rcur), blobmsg_len(rcur));
3778
3779 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3780 !parse_ip_and_netmask(AF_INET6,
3781 blobmsg_data(tb_cur), &ip6prefix,
3782 &ip6len)) {
3783 ret = -EINVAL;
3784 goto failure;
3785 }
3786
3787 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3788 !parse_ip_and_netmask(AF_INET,
3789 blobmsg_data(tb_cur), &ip4prefix,
3790 &ip4len)) {
3791 ret = -EINVAL;
3792 goto failure;
3793 }
3794
3795 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3796 ret = -EINVAL;
3797 goto failure;
3798 }
3799 ealen = blobmsg_get_u32(tb_cur);
3800
3801 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3802 ret = -EINVAL;
3803 goto failure;
3804 }
3805 offset = blobmsg_get_u32(tb_cur);
3806
3807 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3808 if (!rule) {
3809 ret = -ENOMEM;
3810 goto failure;
3811 }
3812
3813 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3814 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3815 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3816 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3817 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3818 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3819
3820 nla_nest_end(nlm, rule);
3821 }
3822
3823 nla_nest_end(nlm, fmrs);
3824 }
3825 #endif
3826 if (tun_flags)
3827 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3828 }
3829
3830 nla_nest_end(nlm, infodata);
3831 nla_nest_end(nlm, linkinfo);
3832
3833 return system_rtnl_call(nlm);
3834
3835 failure:
3836 nlmsg_free(nlm);
3837 return ret;
3838 }
3839 #endif
3840
3841 #ifdef IFLA_IPTUN_MAX
3842 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3843 static int system_add_gre_tunnel(const char *name, const char *kind,
3844 const unsigned int link, struct blob_attr **tb, bool v6)
3845 {
3846 struct nl_msg *nlm;
3847 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3848 struct blob_attr *cur;
3849 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3850 uint16_t iflags = 0, oflags = 0;
3851 uint8_t tos = 0;
3852 int ret = 0, ttl = 0;
3853 unsigned encap_limit = 0;
3854
3855 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3856 if (!nlm)
3857 return -1;
3858
3859 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3860 nla_put_string(nlm, IFLA_IFNAME, name);
3861
3862 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3863 if (!linkinfo) {
3864 ret = -ENOMEM;
3865 goto failure;
3866 }
3867
3868 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3869 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3870 if (!infodata) {
3871 ret = -ENOMEM;
3872 goto failure;
3873 }
3874
3875 if (link)
3876 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3877
3878 if ((cur = tb[TUNNEL_ATTR_TTL]))
3879 ttl = blobmsg_get_u32(cur);
3880
3881 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3882 char *str = blobmsg_get_string(cur);
3883 if (strcmp(str, "inherit")) {
3884 unsigned uval;
3885
3886 if (!system_tos_aton(str, &uval)) {
3887 ret = -EINVAL;
3888 goto failure;
3889 }
3890
3891 if (v6)
3892 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3893 else
3894 tos = uval;
3895 } else {
3896 if (v6)
3897 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3898 else
3899 tos = 1;
3900 }
3901 }
3902
3903 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3904 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3905
3906 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3907 blobmsg_data(cur), blobmsg_len(cur));
3908
3909 if ((cur = tb_data[GRE_DATA_IKEY])) {
3910 if ((ikey = blobmsg_get_u32(cur)))
3911 iflags |= GRE_KEY;
3912 }
3913
3914 if ((cur = tb_data[GRE_DATA_OKEY])) {
3915 if ((okey = blobmsg_get_u32(cur)))
3916 oflags |= GRE_KEY;
3917 }
3918
3919 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3920 if (blobmsg_get_bool(cur))
3921 iflags |= GRE_CSUM;
3922 }
3923
3924 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3925 if (blobmsg_get_bool(cur))
3926 oflags |= GRE_CSUM;
3927 }
3928
3929 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3930 if (blobmsg_get_bool(cur))
3931 iflags |= GRE_SEQ;
3932 }
3933
3934 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3935 if (blobmsg_get_bool(cur))
3936 oflags |= GRE_SEQ;
3937 }
3938
3939 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3940 char *str = blobmsg_get_string(cur);
3941
3942 if (strcmp(str, "ignore")) {
3943 char *e;
3944
3945 encap_limit = strtoul(str, &e, 0);
3946
3947 if (e == str || *e || encap_limit > 255) {
3948 ret = -EINVAL;
3949 goto failure;
3950 }
3951
3952 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3953 }
3954 }
3955 }
3956
3957 if (v6) {
3958 struct in6_addr in6buf;
3959 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3960 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3961 ret = -EINVAL;
3962 goto failure;
3963 }
3964 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3965 }
3966
3967 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3968 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3969 ret = -EINVAL;
3970 goto failure;
3971 }
3972 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3973 }
3974
3975 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3976 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3977
3978 if (flowinfo)
3979 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3980
3981 if (flags6)
3982 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3983
3984 if (!ttl)
3985 ttl = 64;
3986 } else {
3987 struct in_addr inbuf;
3988 bool set_df = true;
3989
3990 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3991 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3992 ret = -EINVAL;
3993 goto failure;
3994 }
3995 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3996 }
3997
3998 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3999 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4000 ret = -EINVAL;
4001 goto failure;
4002 }
4003 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
4004
4005 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
4006 if (!okey) {
4007 okey = inbuf.s_addr;
4008 oflags |= GRE_KEY;
4009 }
4010
4011 if (!ikey) {
4012 ikey = inbuf.s_addr;
4013 iflags |= GRE_KEY;
4014 }
4015 }
4016 }
4017
4018 if ((cur = tb[TUNNEL_ATTR_DF]))
4019 set_df = blobmsg_get_bool(cur);
4020
4021 if (!set_df) {
4022 /* ttl != 0 and nopmtudisc are incompatible */
4023 if (ttl) {
4024 ret = -EINVAL;
4025 goto failure;
4026 }
4027 } else if (!ttl)
4028 ttl = 64;
4029
4030 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
4031
4032 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
4033 }
4034
4035 if (ttl)
4036 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
4037
4038 if (oflags)
4039 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
4040
4041 if (iflags)
4042 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
4043
4044 if (okey)
4045 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
4046
4047 if (ikey)
4048 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
4049
4050 nla_nest_end(nlm, infodata);
4051 nla_nest_end(nlm, linkinfo);
4052
4053 return system_rtnl_call(nlm);
4054
4055 failure:
4056 nlmsg_free(nlm);
4057 return ret;
4058 }
4059 #endif
4060
4061 #ifdef IFLA_VTI_MAX
4062 static int system_add_vti_tunnel(const char *name, const char *kind,
4063 const unsigned int link, struct blob_attr **tb, bool v6)
4064 {
4065 struct nl_msg *nlm;
4066 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4067 struct blob_attr *cur;
4068 int ret = 0;
4069
4070 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4071 if (!nlm)
4072 return -1;
4073
4074 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4075 nla_put_string(nlm, IFLA_IFNAME, name);
4076
4077 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4078 if (!linkinfo) {
4079 ret = -ENOMEM;
4080 goto failure;
4081 }
4082
4083 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4084 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4085 if (!infodata) {
4086 ret = -ENOMEM;
4087 goto failure;
4088 }
4089
4090 if (link)
4091 nla_put_u32(nlm, IFLA_VTI_LINK, link);
4092
4093 if (v6) {
4094 struct in6_addr in6buf;
4095 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4096 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4097 ret = -EINVAL;
4098 goto failure;
4099 }
4100 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
4101 }
4102
4103 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4104 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4105 ret = -EINVAL;
4106 goto failure;
4107 }
4108 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
4109 }
4110
4111 } else {
4112 struct in_addr inbuf;
4113
4114 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4115 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4116 ret = -EINVAL;
4117 goto failure;
4118 }
4119 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
4120 }
4121
4122 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4123 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4124 ret = -EINVAL;
4125 goto failure;
4126 }
4127 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
4128 }
4129
4130 }
4131
4132 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4133 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
4134 uint32_t ikey = 0, okey = 0;
4135
4136 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
4137 blobmsg_data(cur), blobmsg_len(cur));
4138
4139 if ((cur = tb_data[VTI_DATA_IKEY])) {
4140 if ((ikey = blobmsg_get_u32(cur)))
4141 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
4142 }
4143
4144 if ((cur = tb_data[VTI_DATA_OKEY])) {
4145 if ((okey = blobmsg_get_u32(cur)))
4146 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
4147 }
4148 }
4149
4150 nla_nest_end(nlm, infodata);
4151 nla_nest_end(nlm, linkinfo);
4152
4153 return system_rtnl_call(nlm);
4154
4155 failure:
4156 nlmsg_free(nlm);
4157 return ret;
4158 }
4159 #endif
4160
4161 #ifdef IFLA_XFRM_MAX
4162 static int system_add_xfrm_tunnel(const char *name, const char *kind,
4163 const unsigned int link, struct blob_attr **tb)
4164 {
4165 struct nl_msg *nlm;
4166 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
4167 struct blob_attr *cur;
4168 int ret = 0;
4169
4170 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
4171 if (!nlm)
4172 return -1;
4173
4174 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
4175 nla_put_string(nlm, IFLA_IFNAME, name);
4176
4177 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
4178 if (!linkinfo) {
4179 ret = -ENOMEM;
4180 goto failure;
4181 }
4182
4183 nla_put_string(nlm, IFLA_INFO_KIND, kind);
4184 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
4185 if (!infodata) {
4186 ret = -ENOMEM;
4187 goto failure;
4188 }
4189
4190 if (link)
4191 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
4192
4193 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4194 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
4195 uint32_t if_id = 0;
4196
4197 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
4198 blobmsg_data(cur), blobmsg_len(cur));
4199
4200 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
4201 if ((if_id = blobmsg_get_u32(cur)))
4202 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
4203 }
4204
4205 }
4206
4207 nla_nest_end(nlm, infodata);
4208 nla_nest_end(nlm, linkinfo);
4209
4210 return system_rtnl_call(nlm);
4211
4212 failure:
4213 nlmsg_free(nlm);
4214 return ret;
4215 }
4216 #endif
4217
4218 #ifdef IFLA_VXLAN_MAX
4219 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
4220 struct blob_attr *cur;
4221 if ((cur = tb_data[vxlandatatype])) {
4222 bool val = blobmsg_get_bool(cur);
4223 if (invert)
4224 val = !val;
4225
4226 if ((attrtype == IFLA_VXLAN_GBP) && val)
4227 nla_put_flag(msg, attrtype);
4228 else
4229 nla_put_u8(msg, attrtype, val);
4230
4231 }
4232 }
4233
4234 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
4235 {
4236 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
4237 struct nl_msg *msg;
4238 struct nlattr *linkinfo, *data;
4239 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
4240 struct blob_attr *cur;
4241 int ret = 0;
4242
4243 if ((cur = tb[TUNNEL_ATTR_DATA]))
4244 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
4245 blobmsg_data(cur), blobmsg_len(cur));
4246 else
4247 return -EINVAL;
4248
4249 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
4250
4251 if (!msg)
4252 return -1;
4253
4254 nlmsg_append(msg, &iim, sizeof(iim), 0);
4255
4256 nla_put_string(msg, IFLA_IFNAME, name);
4257
4258 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
4259 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
4260 if (!ea) {
4261 ret = -EINVAL;
4262 goto failure;
4263 }
4264
4265 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
4266 }
4267
4268 if ((cur = tb[TUNNEL_ATTR_MTU])) {
4269 uint32_t mtu = blobmsg_get_u32(cur);
4270 nla_put_u32(msg, IFLA_MTU, mtu);
4271 }
4272
4273 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
4274 ret = -ENOMEM;
4275 goto failure;
4276 }
4277
4278 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
4279
4280 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
4281 ret = -ENOMEM;
4282 goto failure;
4283 }
4284
4285 if (link)
4286 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
4287
4288 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4289 uint32_t id = blobmsg_get_u32(cur);
4290 if (id >= (1u << 24) - 1) {
4291 ret = -EINVAL;
4292 goto failure;
4293 }
4294
4295 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4296 }
4297
4298 if (v6) {
4299 struct in6_addr in6buf;
4300 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4301 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4302 ret = -EINVAL;
4303 goto failure;
4304 }
4305 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4306 }
4307
4308 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4309 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4310 ret = -EINVAL;
4311 goto failure;
4312 }
4313 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4314 }
4315 } else {
4316 struct in_addr inbuf;
4317
4318 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4319 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4320 ret = -EINVAL;
4321 goto failure;
4322 }
4323 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4324 }
4325
4326 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4327 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4328 ret = -EINVAL;
4329 goto failure;
4330 }
4331 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4332 }
4333 }
4334
4335 uint32_t port = 4789;
4336 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4337 port = blobmsg_get_u32(cur);
4338 if (port < 1 || port > 65535) {
4339 ret = -EINVAL;
4340 goto failure;
4341 }
4342 }
4343 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4344
4345 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4346 struct ifla_vxlan_port_range srcports = {0,0};
4347
4348 uint32_t low = blobmsg_get_u32(cur);
4349 if (low < 1 || low > 65535 - 1) {
4350 ret = -EINVAL;
4351 goto failure;
4352 }
4353
4354 srcports.low = htons((uint16_t) low);
4355 srcports.high = htons((uint16_t) (low+1));
4356
4357 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4358 uint32_t high = blobmsg_get_u32(cur);
4359 if (high < 1 || high > 65535) {
4360 ret = -EINVAL;
4361 goto failure;
4362 }
4363
4364 if (high > low)
4365 srcports.high = htons((uint16_t) high);
4366 }
4367
4368 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4369 }
4370
4371 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4372 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4373 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4374 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4375 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4376 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4377 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4378 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4379 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4380
4381 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4382 uint32_t ageing = blobmsg_get_u32(cur);
4383 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4384 }
4385
4386 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4387 uint32_t maxaddress = blobmsg_get_u32(cur);
4388 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4389 }
4390
4391 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4392 char *str = blobmsg_get_string(cur);
4393 unsigned tos = 1;
4394
4395 if (strcmp(str, "inherit")) {
4396 if (!system_tos_aton(str, &tos)) {
4397 ret = -EINVAL;
4398 goto failure;
4399 }
4400 }
4401
4402 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4403 }
4404
4405 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4406 uint32_t ttl = blobmsg_get_u32(cur);
4407 if (ttl < 1 || ttl > 255) {
4408 ret = -EINVAL;
4409 goto failure;
4410 }
4411
4412 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4413 }
4414
4415 nla_nest_end(msg, data);
4416 nla_nest_end(msg, linkinfo);
4417
4418 ret = system_rtnl_call(msg);
4419 if (ret)
4420 D(SYSTEM, "Error adding vxlan '%s': %d", name, ret);
4421
4422 return ret;
4423
4424 failure:
4425 nlmsg_free(msg);
4426 return ret;
4427 }
4428 #endif
4429
4430 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4431 {
4432 struct blob_attr *cur;
4433 int ret = 0;
4434
4435 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4436 return -1;
4437
4438 #ifdef SIOCADD6RD
4439 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4440 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4441 unsigned int mask;
4442 struct ip_tunnel_6rd p6;
4443
4444 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4445 blobmsg_data(cur), blobmsg_len(cur));
4446
4447 memset(&p6, 0, sizeof(p6));
4448
4449 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4450 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4451 &p6.prefix, &mask) || mask > 128) {
4452 ret = -EINVAL;
4453 goto failure;
4454 }
4455
4456 p6.prefixlen = mask;
4457 }
4458
4459 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4460 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4461 &p6.relay_prefix, &mask) || mask > 32) {
4462 ret = -EINVAL;
4463 goto failure;
4464 }
4465
4466 p6.relay_prefixlen = mask;
4467 }
4468
4469 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4470 ret = -1;
4471 goto failure;
4472 }
4473 }
4474 #endif
4475
4476 return ret;
4477
4478 failure:
4479 system_link_del(name);
4480 return ret;
4481 }
4482
4483 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4484 {
4485 struct blob_attr *cur;
4486 bool set_df = true;
4487 struct ip_tunnel_parm p = {
4488 .link = link,
4489 .iph = {
4490 .version = 4,
4491 .ihl = 5,
4492 .protocol = proto,
4493 }
4494 };
4495
4496 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4497 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4498 return -EINVAL;
4499
4500 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4501 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4502 return -EINVAL;
4503
4504 if ((cur = tb[TUNNEL_ATTR_DF]))
4505 set_df = blobmsg_get_bool(cur);
4506
4507 if ((cur = tb[TUNNEL_ATTR_TTL]))
4508 p.iph.ttl = blobmsg_get_u32(cur);
4509
4510 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4511 char *str = blobmsg_get_string(cur);
4512 if (strcmp(str, "inherit")) {
4513 unsigned uval;
4514
4515 if (!system_tos_aton(str, &uval))
4516 return -EINVAL;
4517
4518 p.iph.tos = uval;
4519 } else
4520 p.iph.tos = 1;
4521 }
4522
4523 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4524 /* ttl !=0 and nopmtudisc are incompatible */
4525 if (p.iph.ttl && p.iph.frag_off == 0)
4526 return -EINVAL;
4527
4528 strncpy(p.name, name, sizeof(p.name) - 1);
4529
4530 switch (p.iph.protocol) {
4531 case IPPROTO_IPIP:
4532 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4533 case IPPROTO_IPV6:
4534 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4535 default:
4536 break;
4537 }
4538 return -1;
4539 }
4540
4541 int system_del_ip_tunnel(const struct device *dev)
4542 {
4543 return system_link_del(dev->ifname);
4544 }
4545
4546 int system_update_ipv6_mtu(struct device *dev, int mtu)
4547 {
4548 int ret = -1;
4549 char buf[64];
4550 int fd;
4551
4552 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4553 if (fd < 0)
4554 return ret;
4555
4556 if (!mtu) {
4557 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4558 if (len < 0)
4559 goto out;
4560
4561 buf[len] = 0;
4562 ret = atoi(buf);
4563 } else {
4564 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4565 ret = mtu;
4566 }
4567
4568 out:
4569 close(fd);
4570 return ret;
4571 }
4572
4573 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4574 {
4575 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4576 struct blob_attr *cur;
4577 const char *str;
4578
4579 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4580 blob_data(attr), blob_len(attr));
4581
4582 system_link_del(dev->ifname);
4583
4584 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4585 return -EINVAL;
4586 str = blobmsg_data(cur);
4587
4588 unsigned int ttl = 0;
4589 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4590 ttl = blobmsg_get_u32(cur);
4591 if (ttl > 255)
4592 return -EINVAL;
4593 }
4594
4595 unsigned int link = 0;
4596 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4597 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4598 if (!iface)
4599 return -EINVAL;
4600
4601 if (iface->l3_dev.dev)
4602 link = iface->l3_dev.dev->ifindex;
4603 }
4604
4605 if (!strcmp(str, "sit"))
4606 return system_add_sit_tunnel(dev->ifname, link, tb);
4607 #ifdef IFLA_IPTUN_MAX
4608 else if (!strcmp(str, "ipip6")) {
4609 return system_add_ip6_tunnel(dev->ifname, link, tb);
4610 } else if (!strcmp(str, "greip")) {
4611 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4612 } else if (!strcmp(str, "gretapip")) {
4613 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4614 } else if (!strcmp(str, "greip6")) {
4615 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4616 } else if (!strcmp(str, "gretapip6")) {
4617 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4618 #ifdef IFLA_VTI_MAX
4619 } else if (!strcmp(str, "vtiip")) {
4620 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4621 } else if (!strcmp(str, "vtiip6")) {
4622 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4623 #endif
4624 #ifdef IFLA_XFRM_MAX
4625 } else if (!strcmp(str, "xfrm")) {
4626 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4627 #endif
4628 #ifdef IFLA_VXLAN_MAX
4629 } else if(!strcmp(str, "vxlan")) {
4630 return system_add_vxlan(dev->ifname, link, tb, false);
4631 } else if(!strcmp(str, "vxlan6")) {
4632 return system_add_vxlan(dev->ifname, link, tb, true);
4633 #endif
4634 #endif
4635 } else if (!strcmp(str, "ipip")) {
4636 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4637 }
4638 else
4639 return -EINVAL;
4640
4641 return 0;
4642 }
OpenWrt Network interface configuration daemon