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Commit | Line | Data |
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95616c82 OZ |
1 | /* |
2 | * BIRD -- Linux Netlink Interface | |
3 | * | |
4 | * (c) 1999--2000 Martin Mares <mj@ucw.cz> | |
5 | * | |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
7 | */ | |
8 | ||
a8caff32 | 9 | #include <alloca.h> |
95616c82 | 10 | #include <stdio.h> |
f83ce94d | 11 | #include <unistd.h> |
95616c82 OZ |
12 | #include <fcntl.h> |
13 | #include <sys/socket.h> | |
14 | #include <sys/uio.h> | |
15 | #include <errno.h> | |
16 | ||
17 | #undef LOCAL_DEBUG | |
18 | ||
19 | #include "nest/bird.h" | |
20 | #include "nest/route.h" | |
21 | #include "nest/protocol.h" | |
22 | #include "nest/iface.h" | |
4e276a89 | 23 | #include "lib/alloca.h" |
7152e5ef MM |
24 | #include "sysdep/unix/timer.h" |
25 | #include "sysdep/unix/unix.h" | |
26 | #include "sysdep/unix/krt.h" | |
95616c82 OZ |
27 | #include "lib/socket.h" |
28 | #include "lib/string.h" | |
9ddbfbdd | 29 | #include "lib/hash.h" |
95616c82 OZ |
30 | #include "conf/conf.h" |
31 | ||
32 | #include <asm/types.h> | |
33 | #include <linux/if.h> | |
54635f43 | 34 | #ifdef HAVE_LWTUNNEL |
d14f8c3c | 35 | #include <linux/lwtunnel.h> |
54635f43 MM |
36 | #else |
37 | #include "sysdep/linux/lwtunnel.h" | |
38 | #endif | |
95616c82 OZ |
39 | #include <linux/netlink.h> |
40 | #include <linux/rtnetlink.h> | |
41 | ||
9ddbfbdd | 42 | |
95616c82 OZ |
43 | #ifndef MSG_TRUNC /* Hack: Several versions of glibc miss this one :( */ |
44 | #define MSG_TRUNC 0x20 | |
45 | #endif | |
46 | ||
a08a81c6 OZ |
47 | #ifndef IFA_FLAGS |
48 | #define IFA_FLAGS 8 | |
49 | #endif | |
50 | ||
95616c82 OZ |
51 | #ifndef IFF_LOWER_UP |
52 | #define IFF_LOWER_UP 0x10000 | |
53 | #endif | |
54 | ||
9ddbfbdd MM |
55 | #ifndef RTA_TABLE |
56 | #define RTA_TABLE 15 | |
57 | #endif | |
58 | ||
d14f8c3c MM |
59 | #ifndef RTA_VIA |
60 | #define RTA_VIA 18 | |
61 | #endif | |
62 | ||
97e48b6a MM |
63 | #ifndef HAVE_STRUCT_RTVIA |
64 | struct rtvia { | |
65 | __kernel_sa_family_t rtvia_family; | |
66 | __u8 rtvia_addr[0]; | |
67 | }; | |
68 | #endif | |
69 | ||
d14f8c3c MM |
70 | #ifndef RTA_NEWDST |
71 | #define RTA_NEWDST 19 | |
72 | #endif | |
73 | ||
74 | #ifndef RTA_ENCAP_TYPE | |
75 | #define RTA_ENCAP_TYPE 21 | |
76 | #endif | |
77 | ||
78 | #ifndef RTA_ENCAP | |
79 | #define RTA_ENCAP 22 | |
80 | #endif | |
9ddbfbdd | 81 | |
cc5b93f7 | 82 | #define krt_ecmp6(p) ((p)->af == AF_INET6) |
2feaa693 OZ |
83 | |
84 | /* | |
85 | * Structure nl_parse_state keeps state of received route processing. Ideally, | |
86 | * we could just independently parse received Netlink messages and immediately | |
87 | * propagate received routes to the rest of BIRD, but Linux kernel represents | |
88 | * and announces IPv6 ECMP routes not as one route with multiple next hops (like | |
89 | * RTA_MULTIPATH in IPv4 ECMP), but as a set of routes with the same prefix. | |
90 | * | |
91 | * Therefore, BIRD keeps currently processed route in nl_parse_state structure | |
92 | * and postpones its propagation until we expect it to be final; i.e., when | |
93 | * non-matching route is received or when the scan ends. When another matching | |
94 | * route is received, it is merged with the already processed route to form an | |
95 | * ECMP route. Note that merging is done only for IPv6 (merge == 1), but the | |
96 | * postponing is done in both cases (for simplicity). All IPv4 routes are just | |
97 | * considered non-matching. | |
98 | * | |
99 | * This is ignored for asynchronous notifications (every notification is handled | |
100 | * as a separate route). It is not an issue for our routes, as we ignore such | |
101 | * notifications anyways. But importing alien IPv6 ECMP routes does not work | |
102 | * properly. | |
103 | */ | |
104 | ||
105 | struct nl_parse_state | |
106 | { | |
107 | struct linpool *pool; | |
108 | int scan; | |
109 | int merge; | |
110 | ||
111 | net *net; | |
112 | rta *attrs; | |
113 | struct krt_proto *proto; | |
114 | s8 new; | |
115 | s8 krt_src; | |
116 | u8 krt_type; | |
117 | u8 krt_proto; | |
118 | u32 krt_metric; | |
119 | }; | |
120 | ||
95616c82 OZ |
121 | /* |
122 | * Synchronous Netlink interface | |
123 | */ | |
124 | ||
125 | struct nl_sock | |
126 | { | |
127 | int fd; | |
128 | u32 seq; | |
129 | byte *rx_buffer; /* Receive buffer */ | |
130 | struct nlmsghdr *last_hdr; /* Recently received packet */ | |
ae80a2de | 131 | uint last_size; |
95616c82 OZ |
132 | }; |
133 | ||
134 | #define NL_RX_SIZE 8192 | |
135 | ||
2feaa693 OZ |
136 | #define NL_OP_DELETE 0 |
137 | #define NL_OP_ADD (NLM_F_CREATE|NLM_F_EXCL) | |
138 | #define NL_OP_REPLACE (NLM_F_CREATE|NLM_F_REPLACE) | |
139 | #define NL_OP_APPEND (NLM_F_CREATE|NLM_F_APPEND) | |
140 | ||
141 | static linpool *nl_linpool; | |
142 | ||
95616c82 OZ |
143 | static struct nl_sock nl_scan = {.fd = -1}; /* Netlink socket for synchronous scan */ |
144 | static struct nl_sock nl_req = {.fd = -1}; /* Netlink socket for requests */ | |
145 | ||
146 | static void | |
147 | nl_open_sock(struct nl_sock *nl) | |
148 | { | |
149 | if (nl->fd < 0) | |
150 | { | |
151 | nl->fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); | |
152 | if (nl->fd < 0) | |
153 | die("Unable to open rtnetlink socket: %m"); | |
154 | nl->seq = now; | |
155 | nl->rx_buffer = xmalloc(NL_RX_SIZE); | |
156 | nl->last_hdr = NULL; | |
157 | nl->last_size = 0; | |
158 | } | |
159 | } | |
160 | ||
161 | static void | |
162 | nl_open(void) | |
163 | { | |
164 | nl_open_sock(&nl_scan); | |
165 | nl_open_sock(&nl_req); | |
166 | } | |
167 | ||
168 | static void | |
169 | nl_send(struct nl_sock *nl, struct nlmsghdr *nh) | |
170 | { | |
171 | struct sockaddr_nl sa; | |
172 | ||
173 | memset(&sa, 0, sizeof(sa)); | |
174 | sa.nl_family = AF_NETLINK; | |
175 | nh->nlmsg_pid = 0; | |
176 | nh->nlmsg_seq = ++(nl->seq); | |
177 | if (sendto(nl->fd, nh, nh->nlmsg_len, 0, (struct sockaddr *)&sa, sizeof(sa)) < 0) | |
178 | die("rtnetlink sendto: %m"); | |
179 | nl->last_hdr = NULL; | |
180 | } | |
181 | ||
182 | static void | |
86c3eea0 | 183 | nl_request_dump(int af, int cmd) |
95616c82 OZ |
184 | { |
185 | struct { | |
186 | struct nlmsghdr nh; | |
187 | struct rtgenmsg g; | |
641172c6 OZ |
188 | } req = { |
189 | .nh.nlmsg_type = cmd, | |
190 | .nh.nlmsg_len = sizeof(req), | |
191 | .nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP, | |
192 | .g.rtgen_family = af | |
193 | }; | |
95616c82 OZ |
194 | nl_send(&nl_scan, &req.nh); |
195 | } | |
196 | ||
197 | static struct nlmsghdr * | |
198 | nl_get_reply(struct nl_sock *nl) | |
199 | { | |
200 | for(;;) | |
201 | { | |
202 | if (!nl->last_hdr) | |
203 | { | |
204 | struct iovec iov = { nl->rx_buffer, NL_RX_SIZE }; | |
205 | struct sockaddr_nl sa; | |
31e9e101 ST |
206 | struct msghdr m = { |
207 | .msg_name = &sa, | |
208 | .msg_namelen = sizeof(sa), | |
209 | .msg_iov = &iov, | |
210 | .msg_iovlen = 1, | |
211 | }; | |
95616c82 OZ |
212 | int x = recvmsg(nl->fd, &m, 0); |
213 | if (x < 0) | |
214 | die("nl_get_reply: %m"); | |
215 | if (sa.nl_pid) /* It isn't from the kernel */ | |
216 | { | |
217 | DBG("Non-kernel packet\n"); | |
218 | continue; | |
219 | } | |
220 | nl->last_size = x; | |
221 | nl->last_hdr = (void *) nl->rx_buffer; | |
222 | if (m.msg_flags & MSG_TRUNC) | |
223 | bug("nl_get_reply: got truncated reply which should be impossible"); | |
224 | } | |
225 | if (NLMSG_OK(nl->last_hdr, nl->last_size)) | |
226 | { | |
227 | struct nlmsghdr *h = nl->last_hdr; | |
228 | nl->last_hdr = NLMSG_NEXT(h, nl->last_size); | |
229 | if (h->nlmsg_seq != nl->seq) | |
230 | { | |
231 | log(L_WARN "nl_get_reply: Ignoring out of sequence netlink packet (%x != %x)", | |
232 | h->nlmsg_seq, nl->seq); | |
233 | continue; | |
234 | } | |
235 | return h; | |
236 | } | |
237 | if (nl->last_size) | |
238 | log(L_WARN "nl_get_reply: Found packet remnant of size %d", nl->last_size); | |
239 | nl->last_hdr = NULL; | |
240 | } | |
241 | } | |
242 | ||
1123e707 | 243 | static struct tbf rl_netlink_err = TBF_DEFAULT_LOG_LIMITS; |
95616c82 OZ |
244 | |
245 | static int | |
2feaa693 | 246 | nl_error(struct nlmsghdr *h, int ignore_esrch) |
95616c82 OZ |
247 | { |
248 | struct nlmsgerr *e; | |
249 | int ec; | |
250 | ||
251 | if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) | |
252 | { | |
253 | log(L_WARN "Netlink: Truncated error message received"); | |
254 | return ENOBUFS; | |
255 | } | |
256 | e = (struct nlmsgerr *) NLMSG_DATA(h); | |
257 | ec = -e->error; | |
2feaa693 | 258 | if (ec && !(ignore_esrch && (ec == ESRCH))) |
95616c82 OZ |
259 | log_rl(&rl_netlink_err, L_WARN "Netlink: %s", strerror(ec)); |
260 | return ec; | |
261 | } | |
262 | ||
263 | static struct nlmsghdr * | |
264 | nl_get_scan(void) | |
265 | { | |
266 | struct nlmsghdr *h = nl_get_reply(&nl_scan); | |
267 | ||
268 | if (h->nlmsg_type == NLMSG_DONE) | |
269 | return NULL; | |
270 | if (h->nlmsg_type == NLMSG_ERROR) | |
271 | { | |
2feaa693 | 272 | nl_error(h, 0); |
95616c82 OZ |
273 | return NULL; |
274 | } | |
275 | return h; | |
276 | } | |
277 | ||
278 | static int | |
2feaa693 | 279 | nl_exchange(struct nlmsghdr *pkt, int ignore_esrch) |
95616c82 OZ |
280 | { |
281 | struct nlmsghdr *h; | |
282 | ||
283 | nl_send(&nl_req, pkt); | |
284 | for(;;) | |
285 | { | |
286 | h = nl_get_reply(&nl_req); | |
287 | if (h->nlmsg_type == NLMSG_ERROR) | |
288 | break; | |
289 | log(L_WARN "nl_exchange: Unexpected reply received"); | |
290 | } | |
2feaa693 | 291 | return nl_error(h, ignore_esrch) ? -1 : 0; |
95616c82 OZ |
292 | } |
293 | ||
294 | /* | |
295 | * Netlink attributes | |
296 | */ | |
297 | ||
298 | static int nl_attr_len; | |
299 | ||
300 | static void * | |
301 | nl_checkin(struct nlmsghdr *h, int lsize) | |
302 | { | |
303 | nl_attr_len = h->nlmsg_len - NLMSG_LENGTH(lsize); | |
304 | if (nl_attr_len < 0) | |
305 | { | |
306 | log(L_ERR "nl_checkin: underrun by %d bytes", -nl_attr_len); | |
307 | return NULL; | |
308 | } | |
309 | return NLMSG_DATA(h); | |
310 | } | |
311 | ||
ad276157 MM |
312 | struct nl_want_attrs { |
313 | u8 defined:1; | |
314 | u8 checksize:1; | |
315 | u8 size; | |
316 | }; | |
317 | ||
318 | ||
319 | #define BIRD_IFLA_MAX (IFLA_WIRELESS+1) | |
320 | ||
321 | static struct nl_want_attrs ifla_attr_want[BIRD_IFLA_MAX] = { | |
322 | [IFLA_IFNAME] = { 1, 0, 0 }, | |
323 | [IFLA_MTU] = { 1, 1, sizeof(u32) }, | |
324 | [IFLA_WIRELESS] = { 1, 0, 0 }, | |
325 | }; | |
326 | ||
29a64162 | 327 | |
e37d2e3e | 328 | #define BIRD_IFA_MAX (IFA_FLAGS+1) |
ad276157 | 329 | |
ad276157 MM |
330 | static struct nl_want_attrs ifa_attr_want4[BIRD_IFA_MAX] = { |
331 | [IFA_ADDRESS] = { 1, 1, sizeof(ip4_addr) }, | |
332 | [IFA_LOCAL] = { 1, 1, sizeof(ip4_addr) }, | |
333 | [IFA_BROADCAST] = { 1, 1, sizeof(ip4_addr) }, | |
62e64905 | 334 | [IFA_FLAGS] = { 1, 1, sizeof(u32) }, |
ad276157 | 335 | }; |
29a64162 | 336 | |
ad276157 MM |
337 | static struct nl_want_attrs ifa_attr_want6[BIRD_IFA_MAX] = { |
338 | [IFA_ADDRESS] = { 1, 1, sizeof(ip6_addr) }, | |
339 | [IFA_LOCAL] = { 1, 1, sizeof(ip6_addr) }, | |
e37d2e3e | 340 | [IFA_FLAGS] = { 1, 1, sizeof(u32) }, |
ad276157 | 341 | }; |
29a64162 | 342 | |
ad276157 | 343 | |
d14f8c3c | 344 | #define BIRD_RTA_MAX (RTA_ENCAP+1) |
ad276157 | 345 | |
4e276a89 | 346 | static struct nl_want_attrs nexthop_attr_want4[BIRD_RTA_MAX] = { |
ad276157 | 347 | [RTA_GATEWAY] = { 1, 1, sizeof(ip4_addr) }, |
d14f8c3c MM |
348 | [RTA_ENCAP_TYPE]= { 1, 1, sizeof(u16) }, |
349 | [RTA_ENCAP] = { 1, 0, 0 }, | |
350 | }; | |
351 | ||
352 | static struct nl_want_attrs encap_mpls_want[BIRD_RTA_MAX] = { | |
353 | [RTA_DST] = { 1, 0, 0 }, | |
ad276157 MM |
354 | }; |
355 | ||
ad276157 MM |
356 | static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = { |
357 | [RTA_DST] = { 1, 1, sizeof(ip4_addr) }, | |
358 | [RTA_OIF] = { 1, 1, sizeof(u32) }, | |
359 | [RTA_GATEWAY] = { 1, 1, sizeof(ip4_addr) }, | |
360 | [RTA_PRIORITY] = { 1, 1, sizeof(u32) }, | |
361 | [RTA_PREFSRC] = { 1, 1, sizeof(ip4_addr) }, | |
362 | [RTA_METRICS] = { 1, 0, 0 }, | |
363 | [RTA_MULTIPATH] = { 1, 0, 0 }, | |
364 | [RTA_FLOW] = { 1, 1, sizeof(u32) }, | |
365 | [RTA_TABLE] = { 1, 1, sizeof(u32) }, | |
d14f8c3c MM |
366 | [RTA_ENCAP_TYPE]= { 1, 1, sizeof(u16) }, |
367 | [RTA_ENCAP] = { 1, 0, 0 }, | |
ad276157 | 368 | }; |
29a64162 | 369 | |
ad276157 MM |
370 | static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = { |
371 | [RTA_DST] = { 1, 1, sizeof(ip6_addr) }, | |
372 | [RTA_IIF] = { 1, 1, sizeof(u32) }, | |
373 | [RTA_OIF] = { 1, 1, sizeof(u32) }, | |
374 | [RTA_GATEWAY] = { 1, 1, sizeof(ip6_addr) }, | |
375 | [RTA_PRIORITY] = { 1, 1, sizeof(u32) }, | |
376 | [RTA_PREFSRC] = { 1, 1, sizeof(ip6_addr) }, | |
377 | [RTA_METRICS] = { 1, 0, 0 }, | |
378 | [RTA_FLOW] = { 1, 1, sizeof(u32) }, | |
379 | [RTA_TABLE] = { 1, 1, sizeof(u32) }, | |
d14f8c3c MM |
380 | [RTA_ENCAP_TYPE]= { 1, 1, sizeof(u16) }, |
381 | [RTA_ENCAP] = { 1, 0, 0 }, | |
382 | }; | |
383 | ||
384 | static struct nl_want_attrs rtm_attr_want_mpls[BIRD_RTA_MAX] = { | |
385 | [RTA_DST] = { 1, 1, sizeof(u32) }, | |
386 | [RTA_IIF] = { 1, 1, sizeof(u32) }, | |
387 | [RTA_OIF] = { 1, 1, sizeof(u32) }, | |
388 | [RTA_PRIORITY] = { 1, 1, sizeof(u32) }, | |
389 | [RTA_METRICS] = { 1, 0, 0 }, | |
390 | [RTA_FLOW] = { 1, 1, sizeof(u32) }, | |
391 | [RTA_TABLE] = { 1, 1, sizeof(u32) }, | |
392 | [RTA_VIA] = { 1, 0, 0 }, | |
393 | [RTA_NEWDST] = { 1, 0, 0 }, | |
ad276157 | 394 | }; |
ad276157 MM |
395 | |
396 | ||
95616c82 | 397 | static int |
ad276157 | 398 | nl_parse_attrs(struct rtattr *a, struct nl_want_attrs *want, struct rtattr **k, int ksize) |
95616c82 OZ |
399 | { |
400 | int max = ksize / sizeof(struct rtattr *); | |
401 | bzero(k, ksize); | |
ad276157 MM |
402 | |
403 | for ( ; RTA_OK(a, nl_attr_len); a = RTA_NEXT(a, nl_attr_len)) | |
95616c82 | 404 | { |
ad276157 MM |
405 | if ((a->rta_type >= max) || !want[a->rta_type].defined) |
406 | continue; | |
407 | ||
408 | if (want[a->rta_type].checksize && (RTA_PAYLOAD(a) != want[a->rta_type].size)) | |
409 | { | |
9b136840 | 410 | log(L_ERR "nl_parse_attrs: Malformed attribute received"); |
ad276157 MM |
411 | return 0; |
412 | } | |
413 | ||
414 | k[a->rta_type] = a; | |
95616c82 | 415 | } |
ad276157 | 416 | |
95616c82 OZ |
417 | if (nl_attr_len) |
418 | { | |
419 | log(L_ERR "nl_parse_attrs: remnant of size %d", nl_attr_len); | |
420 | return 0; | |
421 | } | |
ad276157 MM |
422 | |
423 | return 1; | |
95616c82 OZ |
424 | } |
425 | ||
d14f8c3c MM |
426 | static inline u16 rta_get_u16(struct rtattr *a) |
427 | { return *(u16 *) RTA_DATA(a); } | |
428 | ||
fce764f9 | 429 | static inline u32 rta_get_u32(struct rtattr *a) |
acb04cfd OZ |
430 | { return *(u32 *) RTA_DATA(a); } |
431 | ||
432 | static inline ip4_addr rta_get_ip4(struct rtattr *a) | |
433 | { return ip4_ntoh(*(ip4_addr *) RTA_DATA(a)); } | |
434 | ||
435 | static inline ip6_addr rta_get_ip6(struct rtattr *a) | |
436 | { return ip6_ntoh(*(ip6_addr *) RTA_DATA(a)); } | |
437 | ||
9b136840 MM |
438 | static inline ip_addr rta_get_ipa(struct rtattr *a) |
439 | { | |
440 | if (RTA_PAYLOAD(a) == sizeof(ip4_addr)) | |
441 | return ipa_from_ip4(rta_get_ip4(a)); | |
442 | else | |
443 | return ipa_from_ip6(rta_get_ip6(a)); | |
444 | } | |
acb04cfd | 445 | |
d14f8c3c MM |
446 | static inline ip_addr rta_get_via(struct rtattr *a) |
447 | { | |
448 | struct rtvia *v = RTA_DATA(a); | |
449 | switch(v->rtvia_family) { | |
450 | case AF_INET: return ipa_from_ip4(ip4_ntoh(*(ip4_addr *) v->rtvia_addr)); | |
451 | case AF_INET6: return ipa_from_ip6(ip6_ntoh(*(ip6_addr *) v->rtvia_addr)); | |
452 | } | |
453 | return IPA_NONE; | |
454 | } | |
455 | ||
456 | static u32 rta_mpls_stack[MPLS_MAX_LABEL_STACK]; | |
457 | static inline int rta_get_mpls(struct rtattr *a, u32 *stack) | |
458 | { | |
459 | if (RTA_PAYLOAD(a) % 4) | |
460 | log(L_WARN "KRT: Strange length of received MPLS stack: %u", RTA_PAYLOAD(a)); | |
461 | ||
462 | return mpls_get(RTA_DATA(a), RTA_PAYLOAD(a) & ~0x3, stack); | |
463 | } | |
464 | ||
9fdf9d29 OZ |
465 | struct rtattr * |
466 | nl_add_attr(struct nlmsghdr *h, uint bufsize, uint code, const void *data, uint dlen) | |
95616c82 | 467 | { |
9fdf9d29 OZ |
468 | uint pos = NLMSG_ALIGN(h->nlmsg_len); |
469 | uint len = RTA_LENGTH(dlen); | |
95616c82 OZ |
470 | |
471 | if (pos + len > bufsize) | |
472 | bug("nl_add_attr: packet buffer overflow"); | |
9fdf9d29 OZ |
473 | |
474 | struct rtattr *a = (struct rtattr *)((char *)h + pos); | |
95616c82 OZ |
475 | a->rta_type = code; |
476 | a->rta_len = len; | |
477 | h->nlmsg_len = pos + len; | |
9fdf9d29 OZ |
478 | |
479 | if (dlen > 0) | |
480 | memcpy(RTA_DATA(a), data, dlen); | |
481 | ||
482 | return a; | |
95616c82 OZ |
483 | } |
484 | ||
d14f8c3c MM |
485 | static inline struct rtattr * |
486 | nl_open_attr(struct nlmsghdr *h, uint bufsize, uint code) | |
487 | { | |
488 | return nl_add_attr(h, bufsize, code, NULL, 0); | |
489 | } | |
490 | ||
491 | static inline void | |
492 | nl_close_attr(struct nlmsghdr *h, struct rtattr *a) | |
493 | { | |
494 | a->rta_len = (void *)h + NLMSG_ALIGN(h->nlmsg_len) - (void *)a; | |
495 | } | |
496 | ||
497 | static inline void | |
498 | nl_add_attr_u16(struct nlmsghdr *h, uint bufsize, int code, u16 data) | |
499 | { | |
500 | nl_add_attr(h, bufsize, code, &data, 2); | |
501 | } | |
502 | ||
95616c82 | 503 | static inline void |
29a64162 | 504 | nl_add_attr_u32(struct nlmsghdr *h, uint bufsize, int code, u32 data) |
95616c82 OZ |
505 | { |
506 | nl_add_attr(h, bufsize, code, &data, 4); | |
507 | } | |
508 | ||
509 | static inline void | |
29a64162 | 510 | nl_add_attr_ip4(struct nlmsghdr *h, uint bufsize, int code, ip4_addr ip4) |
95616c82 | 511 | { |
29a64162 OZ |
512 | ip4 = ip4_hton(ip4); |
513 | nl_add_attr(h, bufsize, code, &ip4, sizeof(ip4)); | |
514 | } | |
515 | ||
516 | static inline void | |
517 | nl_add_attr_ip6(struct nlmsghdr *h, uint bufsize, int code, ip6_addr ip6) | |
518 | { | |
519 | ip6 = ip6_hton(ip6); | |
520 | nl_add_attr(h, bufsize, code, &ip6, sizeof(ip6)); | |
521 | } | |
522 | ||
523 | static inline void | |
524 | nl_add_attr_ipa(struct nlmsghdr *h, uint bufsize, int code, ip_addr ipa) | |
525 | { | |
526 | if (ipa_is_ip4(ipa)) | |
527 | nl_add_attr_ip4(h, bufsize, code, ipa_to_ip4(ipa)); | |
9b136840 | 528 | else |
29a64162 | 529 | nl_add_attr_ip6(h, bufsize, code, ipa_to_ip6(ipa)); |
95616c82 OZ |
530 | } |
531 | ||
d14f8c3c MM |
532 | static inline void |
533 | nl_add_attr_mpls(struct nlmsghdr *h, uint bufsize, int code, int len, u32 *stack) | |
9fdf9d29 | 534 | { |
d14f8c3c MM |
535 | char buf[len*4]; |
536 | mpls_put(buf, len, stack); | |
537 | nl_add_attr(h, bufsize, code, buf, len*4); | |
9fdf9d29 | 538 | } |
95616c82 OZ |
539 | |
540 | static inline void | |
d14f8c3c | 541 | nl_add_attr_mpls_encap(struct nlmsghdr *h, uint bufsize, int len, u32 *stack) |
95616c82 | 542 | { |
d14f8c3c MM |
543 | nl_add_attr_u16(h, bufsize, RTA_ENCAP_TYPE, LWTUNNEL_ENCAP_MPLS); |
544 | ||
545 | struct rtattr *nest = nl_open_attr(h, bufsize, RTA_ENCAP); | |
546 | nl_add_attr_mpls(h, bufsize, RTA_DST, len, stack); | |
547 | nl_close_attr(h, nest); | |
548 | } | |
549 | ||
550 | static inline void | |
551 | nl_add_attr_via(struct nlmsghdr *h, uint bufsize, ip_addr ipa) | |
552 | { | |
553 | struct rtattr *nest = nl_open_attr(h, bufsize, RTA_VIA); | |
554 | struct rtvia *via = RTA_DATA(nest); | |
555 | ||
556 | h->nlmsg_len += sizeof(*via); | |
557 | ||
62e64905 OZ |
558 | if (ipa_is_ip4(ipa)) |
559 | { | |
d14f8c3c | 560 | via->rtvia_family = AF_INET; |
62e64905 OZ |
561 | put_ip4(via->rtvia_addr, ipa_to_ip4(ipa)); |
562 | h->nlmsg_len += sizeof(ip4_addr); | |
563 | } | |
564 | else | |
565 | { | |
d14f8c3c | 566 | via->rtvia_family = AF_INET6; |
62e64905 OZ |
567 | put_ip6(via->rtvia_addr, ipa_to_ip6(ipa)); |
568 | h->nlmsg_len += sizeof(ip6_addr); | |
d14f8c3c MM |
569 | } |
570 | ||
571 | nl_close_attr(h, nest); | |
95616c82 OZ |
572 | } |
573 | ||
9fdf9d29 OZ |
574 | static inline struct rtnexthop * |
575 | nl_open_nexthop(struct nlmsghdr *h, uint bufsize) | |
576 | { | |
577 | uint pos = NLMSG_ALIGN(h->nlmsg_len); | |
578 | uint len = RTNH_LENGTH(0); | |
579 | ||
580 | if (pos + len > bufsize) | |
581 | bug("nl_open_nexthop: packet buffer overflow"); | |
582 | ||
583 | h->nlmsg_len = pos + len; | |
584 | ||
585 | return (void *)h + pos; | |
586 | } | |
587 | ||
588 | static inline void | |
589 | nl_close_nexthop(struct nlmsghdr *h, struct rtnexthop *nh) | |
590 | { | |
591 | nh->rtnh_len = (void *)h + NLMSG_ALIGN(h->nlmsg_len) - (void *)nh; | |
592 | } | |
95616c82 | 593 | |
d14f8c3c MM |
594 | static inline void |
595 | nl_add_nexthop(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af) | |
596 | { | |
597 | if (nh->labels > 0) | |
598 | if (af == AF_MPLS) | |
599 | nl_add_attr_mpls(h, bufsize, RTA_NEWDST, nh->labels, nh->label); | |
600 | else | |
601 | nl_add_attr_mpls_encap(h, bufsize, nh->labels, nh->label); | |
602 | ||
603 | if (ipa_nonzero(nh->gw)) | |
604 | if (af == AF_MPLS) | |
605 | nl_add_attr_via(h, bufsize, nh->gw); | |
606 | else | |
607 | nl_add_attr_ipa(h, bufsize, RTA_GATEWAY, nh->gw); | |
608 | } | |
609 | ||
95616c82 | 610 | static void |
d14f8c3c | 611 | nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af) |
95616c82 | 612 | { |
9fdf9d29 OZ |
613 | struct rtattr *a = nl_open_attr(h, bufsize, RTA_MULTIPATH); |
614 | ||
95616c82 | 615 | for (; nh; nh = nh->next) |
9fdf9d29 OZ |
616 | { |
617 | struct rtnexthop *rtnh = nl_open_nexthop(h, bufsize); | |
95616c82 | 618 | |
9fdf9d29 OZ |
619 | rtnh->rtnh_flags = 0; |
620 | rtnh->rtnh_hops = nh->weight; | |
621 | rtnh->rtnh_ifindex = nh->iface->index; | |
95616c82 | 622 | |
d14f8c3c | 623 | nl_add_nexthop(h, bufsize, nh, af); |
95616c82 | 624 | |
9fdf9d29 OZ |
625 | nl_close_nexthop(h, rtnh); |
626 | } | |
627 | ||
628 | nl_close_attr(h, a); | |
629 | } | |
95616c82 | 630 | |
4e276a89 | 631 | static struct nexthop * |
95616c82 OZ |
632 | nl_parse_multipath(struct krt_proto *p, struct rtattr *ra) |
633 | { | |
634 | /* Temporary buffer for multicast nexthops */ | |
4e276a89 | 635 | static struct nexthop *nh_buffer; |
95616c82 OZ |
636 | static int nh_buf_size; /* in number of structures */ |
637 | static int nh_buf_used; | |
638 | ||
ad276157 | 639 | struct rtattr *a[BIRD_RTA_MAX]; |
95616c82 | 640 | struct rtnexthop *nh = RTA_DATA(ra); |
4e276a89 | 641 | struct nexthop *rv, *first, **last; |
3e236955 | 642 | unsigned len = RTA_PAYLOAD(ra); |
95616c82 OZ |
643 | |
644 | first = NULL; | |
645 | last = &first; | |
646 | nh_buf_used = 0; | |
647 | ||
648 | while (len) | |
649 | { | |
650 | /* Use RTNH_OK(nh,len) ?? */ | |
651 | if ((len < sizeof(*nh)) || (len < nh->rtnh_len)) | |
652 | return NULL; | |
653 | ||
654 | if (nh_buf_used == nh_buf_size) | |
655 | { | |
656 | nh_buf_size = nh_buf_size ? (nh_buf_size * 2) : 4; | |
d14f8c3c | 657 | nh_buffer = xrealloc(nh_buffer, nh_buf_size * NEXTHOP_MAX_SIZE); |
95616c82 OZ |
658 | } |
659 | *last = rv = nh_buffer + nh_buf_used++; | |
660 | rv->next = NULL; | |
661 | last = &(rv->next); | |
662 | ||
663 | rv->weight = nh->rtnh_hops; | |
664 | rv->iface = if_find_by_index(nh->rtnh_ifindex); | |
665 | if (!rv->iface) | |
666 | return NULL; | |
667 | ||
668 | /* Nonexistent RTNH_PAYLOAD ?? */ | |
669 | nl_attr_len = nh->rtnh_len - RTNH_LENGTH(0); | |
4e276a89 | 670 | nl_parse_attrs(RTNH_DATA(nh), nexthop_attr_want4, a, sizeof(a)); |
95616c82 OZ |
671 | if (a[RTA_GATEWAY]) |
672 | { | |
23c212e7 | 673 | rv->gw = rta_get_ipa(a[RTA_GATEWAY]); |
95616c82 | 674 | |
23c212e7 OZ |
675 | neighbor *nbr; |
676 | nbr = neigh_find2(&p->p, &rv->gw, rv->iface, | |
677 | (nh->rtnh_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0); | |
678 | if (!nbr || (nbr->scope == SCOPE_HOST)) | |
95616c82 OZ |
679 | return NULL; |
680 | } | |
681 | else | |
d14f8c3c | 682 | rv->gw = IPA_NONE; |
62e64905 | 683 | |
d14f8c3c MM |
684 | if (a[RTA_ENCAP_TYPE]) |
685 | { | |
686 | if (rta_get_u16(a[RTA_ENCAP_TYPE]) != LWTUNNEL_ENCAP_MPLS) { | |
687 | log(L_WARN "KRT: Unknown encapsulation method %d in multipath", rta_get_u16(a[RTA_ENCAP_TYPE])); | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | struct rtattr *enca[BIRD_RTA_MAX]; | |
692 | nl_attr_len = RTA_PAYLOAD(a[RTA_ENCAP]); | |
693 | nl_parse_attrs(RTA_DATA(a[RTA_ENCAP]), encap_mpls_want, enca, sizeof(enca)); | |
694 | rv->labels = rta_get_mpls(enca[RTA_DST], rv->label); | |
695 | break; | |
696 | } | |
697 | ||
95616c82 OZ |
698 | |
699 | len -= NLMSG_ALIGN(nh->rtnh_len); | |
700 | nh = RTNH_NEXT(nh); | |
701 | } | |
702 | ||
703 | return first; | |
704 | } | |
705 | ||
9fdf9d29 OZ |
706 | static void |
707 | nl_add_metrics(struct nlmsghdr *h, uint bufsize, u32 *metrics, int max) | |
708 | { | |
709 | struct rtattr *a = nl_open_attr(h, bufsize, RTA_METRICS); | |
710 | int t; | |
711 | ||
712 | for (t = 1; t < max; t++) | |
713 | if (metrics[0] & (1 << t)) | |
714 | nl_add_attr_u32(h, bufsize, t, metrics[t]); | |
715 | ||
716 | nl_close_attr(h, a); | |
717 | } | |
718 | ||
719 | static int | |
720 | nl_parse_metrics(struct rtattr *hdr, u32 *metrics, int max) | |
721 | { | |
722 | struct rtattr *a = RTA_DATA(hdr); | |
723 | int len = RTA_PAYLOAD(hdr); | |
724 | ||
725 | metrics[0] = 0; | |
726 | for (; RTA_OK(a, len); a = RTA_NEXT(a, len)) | |
727 | { | |
728 | if (a->rta_type == RTA_UNSPEC) | |
729 | continue; | |
730 | ||
731 | if (a->rta_type >= max) | |
732 | continue; | |
733 | ||
734 | if (RTA_PAYLOAD(a) != 4) | |
735 | return -1; | |
736 | ||
737 | metrics[0] |= 1 << a->rta_type; | |
acb04cfd | 738 | metrics[a->rta_type] = rta_get_u32(a); |
9fdf9d29 OZ |
739 | } |
740 | ||
741 | if (len > 0) | |
742 | return -1; | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
95616c82 OZ |
747 | |
748 | /* | |
749 | * Scanning of interfaces | |
750 | */ | |
751 | ||
752 | static void | |
753 | nl_parse_link(struct nlmsghdr *h, int scan) | |
754 | { | |
755 | struct ifinfomsg *i; | |
ad276157 | 756 | struct rtattr *a[BIRD_IFLA_MAX]; |
95616c82 OZ |
757 | int new = h->nlmsg_type == RTM_NEWLINK; |
758 | struct iface f = {}; | |
759 | struct iface *ifi; | |
760 | char *name; | |
761 | u32 mtu; | |
ae80a2de | 762 | uint fl; |
95616c82 | 763 | |
ad276157 | 764 | if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(IFLA_RTA(i), ifla_attr_want, a, sizeof(a))) |
95616c82 | 765 | return; |
ad276157 | 766 | if (!a[IFLA_IFNAME] || (RTA_PAYLOAD(a[IFLA_IFNAME]) < 2) || !a[IFLA_MTU]) |
95616c82 | 767 | { |
ad276157 MM |
768 | /* |
769 | * IFLA_IFNAME and IFLA_MTU are required, in fact, but there may also come | |
770 | * a message with IFLA_WIRELESS set, where (e.g.) no IFLA_IFNAME exists. | |
771 | * We simply ignore all such messages with IFLA_WIRELESS without notice. | |
772 | */ | |
773 | ||
774 | if (a[IFLA_WIRELESS]) | |
775 | return; | |
776 | ||
777 | log(L_ERR "KIF: Malformed message received"); | |
95616c82 OZ |
778 | return; |
779 | } | |
ad276157 | 780 | |
95616c82 | 781 | name = RTA_DATA(a[IFLA_IFNAME]); |
acb04cfd | 782 | mtu = rta_get_u32(a[IFLA_MTU]); |
95616c82 OZ |
783 | |
784 | ifi = if_find_by_index(i->ifi_index); | |
785 | if (!new) | |
786 | { | |
787 | DBG("KIF: IF%d(%s) goes down\n", i->ifi_index, name); | |
788 | if (!ifi) | |
789 | return; | |
790 | ||
791 | if_delete(ifi); | |
792 | } | |
793 | else | |
794 | { | |
795 | DBG("KIF: IF%d(%s) goes up (mtu=%d,flg=%x)\n", i->ifi_index, name, mtu, i->ifi_flags); | |
796 | if (ifi && strncmp(ifi->name, name, sizeof(ifi->name)-1)) | |
797 | if_delete(ifi); | |
798 | ||
799 | strncpy(f.name, name, sizeof(f.name)-1); | |
800 | f.index = i->ifi_index; | |
801 | f.mtu = mtu; | |
802 | ||
803 | fl = i->ifi_flags; | |
804 | if (fl & IFF_UP) | |
805 | f.flags |= IF_ADMIN_UP; | |
806 | if (fl & IFF_LOWER_UP) | |
807 | f.flags |= IF_LINK_UP; | |
808 | if (fl & IFF_LOOPBACK) /* Loopback */ | |
809 | f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE; | |
810 | else if (fl & IFF_POINTOPOINT) /* PtP */ | |
811 | f.flags |= IF_MULTICAST; | |
812 | else if (fl & IFF_BROADCAST) /* Broadcast */ | |
813 | f.flags |= IF_MULTIACCESS | IF_BROADCAST | IF_MULTICAST; | |
814 | else | |
815 | f.flags |= IF_MULTIACCESS; /* NBMA */ | |
3216eb03 | 816 | |
16a3254c OZ |
817 | if (fl & IFF_MULTICAST) |
818 | f.flags |= IF_MULTICAST; | |
819 | ||
3216eb03 OZ |
820 | ifi = if_update(&f); |
821 | ||
822 | if (!scan) | |
823 | if_end_partial_update(ifi); | |
95616c82 OZ |
824 | } |
825 | } | |
826 | ||
827 | static void | |
9b136840 | 828 | nl_parse_addr4(struct ifaddrmsg *i, int scan, int new) |
95616c82 | 829 | { |
ad276157 | 830 | struct rtattr *a[BIRD_IFA_MAX]; |
95616c82 | 831 | struct iface *ifi; |
e37d2e3e | 832 | u32 ifa_flags; |
95616c82 OZ |
833 | int scope; |
834 | ||
9b136840 | 835 | if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want4, a, sizeof(a))) |
95616c82 | 836 | return; |
ad276157 | 837 | |
9b136840 | 838 | if (!a[IFA_LOCAL]) |
ad276157 | 839 | { |
9b136840 MM |
840 | log(L_ERR "KIF: Malformed message received (missing IFA_LOCAL)"); |
841 | return; | |
ad276157 | 842 | } |
ad276157 | 843 | if (!a[IFA_ADDRESS]) |
95616c82 | 844 | { |
ad276157 | 845 | log(L_ERR "KIF: Malformed message received (missing IFA_ADDRESS)"); |
95616c82 OZ |
846 | return; |
847 | } | |
848 | ||
849 | ifi = if_find_by_index(i->ifa_index); | |
850 | if (!ifi) | |
851 | { | |
852 | log(L_ERR "KIF: Received address message for unknown interface %d", i->ifa_index); | |
853 | return; | |
854 | } | |
855 | ||
e37d2e3e OZ |
856 | if (a[IFA_FLAGS]) |
857 | ifa_flags = rta_get_u32(a[IFA_FLAGS]); | |
858 | else | |
859 | ifa_flags = i->ifa_flags; | |
860 | ||
9b136840 | 861 | struct ifa ifa; |
95616c82 OZ |
862 | bzero(&ifa, sizeof(ifa)); |
863 | ifa.iface = ifi; | |
cc5b93f7 | 864 | if (ifa_flags & IFA_F_SECONDARY) |
95616c82 OZ |
865 | ifa.flags |= IA_SECONDARY; |
866 | ||
9b136840 MM |
867 | ifa.ip = rta_get_ipa(a[IFA_LOCAL]); |
868 | ||
d7661fbe | 869 | if (i->ifa_prefixlen > IP4_MAX_PREFIX_LENGTH) |
95616c82 OZ |
870 | { |
871 | log(L_ERR "KIF: Invalid prefix length for interface %s: %d", ifi->name, i->ifa_prefixlen); | |
872 | new = 0; | |
873 | } | |
d7661fbe | 874 | if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH) |
95616c82 | 875 | { |
9b136840 MM |
876 | ifa.brd = rta_get_ipa(a[IFA_ADDRESS]); |
877 | net_fill_ip4(&ifa.prefix, rta_get_ip4(a[IFA_ADDRESS]), i->ifa_prefixlen); | |
95616c82 OZ |
878 | |
879 | /* It is either a host address or a peer address */ | |
9b136840 | 880 | if (ipa_equal(ifa.ip, ifa.brd)) |
95616c82 OZ |
881 | ifa.flags |= IA_HOST; |
882 | else | |
883 | { | |
884 | ifa.flags |= IA_PEER; | |
9b136840 | 885 | ifa.opposite = ifa.brd; |
95616c82 OZ |
886 | } |
887 | } | |
888 | else | |
889 | { | |
9b136840 MM |
890 | net_fill_ip4(&ifa.prefix, ipa_to_ip4(ifa.ip), i->ifa_prefixlen); |
891 | net_normalize(&ifa.prefix); | |
892 | ||
d7661fbe | 893 | if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH - 1) |
95616c82 OZ |
894 | ifa.opposite = ipa_opposite_m1(ifa.ip); |
895 | ||
d7661fbe | 896 | if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH - 2) |
95616c82 OZ |
897 | ifa.opposite = ipa_opposite_m2(ifa.ip); |
898 | ||
899 | if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST]) | |
900 | { | |
9b136840 MM |
901 | ip4_addr xbrd = rta_get_ip4(a[IFA_BROADCAST]); |
902 | ip4_addr ybrd = ip4_or(ipa_to_ip4(ifa.ip), ip4_not(ip4_mkmask(i->ifa_prefixlen))); | |
903 | ||
904 | if (ip4_equal(xbrd, net4_prefix(&ifa.prefix)) || ip4_equal(xbrd, ybrd)) | |
905 | ifa.brd = ipa_from_ip4(xbrd); | |
95616c82 | 906 | else if (ifi->flags & IF_TMP_DOWN) /* Complain only during the first scan */ |
9b136840 | 907 | { |
e691d16a | 908 | log(L_ERR "KIF: Invalid broadcast address %I4 for %s", xbrd, ifi->name); |
9b136840 MM |
909 | ifa.brd = ipa_from_ip4(ybrd); |
910 | } | |
911 | } | |
912 | } | |
913 | ||
914 | scope = ipa_classify(ifa.ip); | |
915 | if (scope < 0) | |
916 | { | |
917 | log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, ifi->name); | |
918 | return; | |
919 | } | |
920 | ifa.scope = scope & IADDR_SCOPE_MASK; | |
921 | ||
922 | DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %N, brd %I, opp %I\n", | |
923 | ifi->index, ifi->name, | |
924 | new ? "added" : "removed", | |
925 | ifa.ip, ifa.flags, ifa.prefix, ifa.brd, ifa.opposite); | |
926 | ||
927 | if (new) | |
928 | ifa_update(&ifa); | |
929 | else | |
930 | ifa_delete(&ifa); | |
931 | ||
932 | if (!scan) | |
933 | if_end_partial_update(ifi); | |
934 | } | |
935 | ||
936 | static void | |
937 | nl_parse_addr6(struct ifaddrmsg *i, int scan, int new) | |
938 | { | |
939 | struct rtattr *a[BIRD_IFA_MAX]; | |
940 | struct iface *ifi; | |
cc5b93f7 | 941 | u32 ifa_flags; |
9b136840 MM |
942 | int scope; |
943 | ||
944 | if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want6, a, sizeof(a))) | |
945 | return; | |
946 | ||
947 | if (!a[IFA_ADDRESS]) | |
948 | { | |
949 | log(L_ERR "KIF: Malformed message received (missing IFA_ADDRESS)"); | |
950 | return; | |
951 | } | |
952 | ||
953 | ifi = if_find_by_index(i->ifa_index); | |
954 | if (!ifi) | |
955 | { | |
956 | log(L_ERR "KIF: Received address message for unknown interface %d", i->ifa_index); | |
957 | return; | |
958 | } | |
959 | ||
cc5b93f7 OZ |
960 | if (a[IFA_FLAGS]) |
961 | ifa_flags = rta_get_u32(a[IFA_FLAGS]); | |
962 | else | |
963 | ifa_flags = i->ifa_flags; | |
964 | ||
9b136840 MM |
965 | struct ifa ifa; |
966 | bzero(&ifa, sizeof(ifa)); | |
967 | ifa.iface = ifi; | |
e37d2e3e | 968 | if (ifa_flags & IFA_F_SECONDARY) |
9b136840 MM |
969 | ifa.flags |= IA_SECONDARY; |
970 | ||
e37d2e3e OZ |
971 | /* Ignore tentative addresses silently */ |
972 | if (ifa_flags & IFA_F_TENTATIVE) | |
973 | return; | |
9b136840 | 974 | |
95616c82 | 975 | /* IFA_LOCAL can be unset for IPv6 interfaces */ |
9b136840 MM |
976 | ifa.ip = rta_get_ipa(a[IFA_LOCAL] ? : a[IFA_ADDRESS]); |
977 | ||
d7661fbe | 978 | if (i->ifa_prefixlen > IP6_MAX_PREFIX_LENGTH) |
9b136840 MM |
979 | { |
980 | log(L_ERR "KIF: Invalid prefix length for interface %s: %d", ifi->name, i->ifa_prefixlen); | |
981 | new = 0; | |
982 | } | |
d7661fbe | 983 | if (i->ifa_prefixlen == IP6_MAX_PREFIX_LENGTH) |
9b136840 MM |
984 | { |
985 | ifa.brd = rta_get_ipa(a[IFA_ADDRESS]); | |
986 | net_fill_ip6(&ifa.prefix, rta_get_ip6(a[IFA_ADDRESS]), i->ifa_prefixlen); | |
987 | ||
988 | /* It is either a host address or a peer address */ | |
989 | if (ipa_equal(ifa.ip, ifa.brd)) | |
990 | ifa.flags |= IA_HOST; | |
991 | else | |
992 | { | |
993 | ifa.flags |= IA_PEER; | |
994 | ifa.opposite = ifa.brd; | |
95616c82 | 995 | } |
9b136840 MM |
996 | } |
997 | else | |
998 | { | |
999 | net_fill_ip6(&ifa.prefix, ipa_to_ip6(ifa.ip), i->ifa_prefixlen); | |
1000 | net_normalize(&ifa.prefix); | |
1001 | ||
d7661fbe | 1002 | if (i->ifa_prefixlen == IP6_MAX_PREFIX_LENGTH - 1) |
9b136840 | 1003 | ifa.opposite = ipa_opposite_m1(ifa.ip); |
95616c82 OZ |
1004 | } |
1005 | ||
1006 | scope = ipa_classify(ifa.ip); | |
1007 | if (scope < 0) | |
1008 | { | |
1009 | log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, ifi->name); | |
1010 | return; | |
1011 | } | |
1012 | ifa.scope = scope & IADDR_SCOPE_MASK; | |
1013 | ||
9b136840 | 1014 | DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %N, brd %I, opp %I\n", |
95616c82 OZ |
1015 | ifi->index, ifi->name, |
1016 | new ? "added" : "removed", | |
9b136840 | 1017 | ifa.ip, ifa.flags, ifa.prefix, ifa.brd, ifa.opposite); |
3216eb03 | 1018 | |
95616c82 OZ |
1019 | if (new) |
1020 | ifa_update(&ifa); | |
1021 | else | |
1022 | ifa_delete(&ifa); | |
3216eb03 OZ |
1023 | |
1024 | if (!scan) | |
1025 | if_end_partial_update(ifi); | |
95616c82 OZ |
1026 | } |
1027 | ||
9b136840 MM |
1028 | static void |
1029 | nl_parse_addr(struct nlmsghdr *h, int scan) | |
1030 | { | |
1031 | struct ifaddrmsg *i; | |
1032 | ||
1033 | if (!(i = nl_checkin(h, sizeof(*i)))) | |
1034 | return; | |
1035 | ||
1036 | int new = (h->nlmsg_type == RTM_NEWADDR); | |
1037 | ||
1038 | switch (i->ifa_family) | |
1039 | { | |
9b136840 MM |
1040 | case AF_INET: |
1041 | return nl_parse_addr4(i, scan, new); | |
29a64162 | 1042 | |
9b136840 MM |
1043 | case AF_INET6: |
1044 | return nl_parse_addr6(i, scan, new); | |
9b136840 MM |
1045 | } |
1046 | } | |
1047 | ||
95616c82 OZ |
1048 | void |
1049 | kif_do_scan(struct kif_proto *p UNUSED) | |
1050 | { | |
1051 | struct nlmsghdr *h; | |
1052 | ||
1053 | if_start_update(); | |
1054 | ||
86c3eea0 | 1055 | nl_request_dump(AF_UNSPEC, RTM_GETLINK); |
95616c82 OZ |
1056 | while (h = nl_get_scan()) |
1057 | if (h->nlmsg_type == RTM_NEWLINK || h->nlmsg_type == RTM_DELLINK) | |
1058 | nl_parse_link(h, 1); | |
1059 | else | |
1060 | log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type); | |
29a64162 | 1061 | |
d7661fbe | 1062 | nl_request_dump(AF_INET, RTM_GETADDR); |
95616c82 OZ |
1063 | while (h = nl_get_scan()) |
1064 | if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR) | |
3216eb03 | 1065 | nl_parse_addr(h, 1); |
95616c82 OZ |
1066 | else |
1067 | log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type); | |
29a64162 | 1068 | |
d7661fbe MM |
1069 | nl_request_dump(AF_INET6, RTM_GETADDR); |
1070 | while (h = nl_get_scan()) | |
1071 | if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR) | |
1072 | nl_parse_addr(h, 1); | |
1073 | else | |
1074 | log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type); | |
29a64162 | 1075 | |
95616c82 OZ |
1076 | if_end_update(); |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Routes | |
1081 | */ | |
1082 | ||
9ddbfbdd MM |
1083 | static inline u32 |
1084 | krt_table_id(struct krt_proto *p) | |
1085 | { | |
1086 | return KRT_CF->sys.table_id; | |
1087 | } | |
1088 | ||
1089 | static HASH(struct krt_proto) nl_table_map; | |
1090 | ||
29a64162 OZ |
1091 | #define RTH_KEY(p) p->af, krt_table_id(p) |
1092 | #define RTH_NEXT(p) p->sys.hash_next | |
1093 | #define RTH_EQ(a1,i1,a2,i2) a1 == a2 && i1 == i2 | |
1094 | #define RTH_FN(a,i) a ^ u32_hash(i) | |
9ddbfbdd MM |
1095 | |
1096 | #define RTH_REHASH rth_rehash | |
1097 | #define RTH_PARAMS /8, *2, 2, 2, 6, 20 | |
1098 | ||
1099 | HASH_DEFINE_REHASH_FN(RTH, struct krt_proto) | |
95616c82 OZ |
1100 | |
1101 | int | |
1102 | krt_capable(rte *e) | |
1103 | { | |
1104 | rta *a = e->attrs; | |
1105 | ||
95616c82 | 1106 | switch (a->dest) |
62e64905 | 1107 | { |
4e276a89 | 1108 | case RTD_UNICAST: |
95616c82 OZ |
1109 | case RTD_BLACKHOLE: |
1110 | case RTD_UNREACHABLE: | |
1111 | case RTD_PROHIBIT: | |
62e64905 OZ |
1112 | return 1; |
1113 | ||
95616c82 OZ |
1114 | default: |
1115 | return 0; | |
62e64905 | 1116 | } |
95616c82 OZ |
1117 | } |
1118 | ||
1119 | static inline int | |
4e276a89 | 1120 | nh_bufsize(struct nexthop *nh) |
95616c82 OZ |
1121 | { |
1122 | int rv = 0; | |
1123 | for (; nh != NULL; nh = nh->next) | |
9fdf9d29 | 1124 | rv += RTNH_LENGTH(RTA_LENGTH(sizeof(ip_addr))); |
95616c82 OZ |
1125 | return rv; |
1126 | } | |
1127 | ||
1128 | static int | |
4e276a89 | 1129 | nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int dest, struct nexthop *nh) |
95616c82 OZ |
1130 | { |
1131 | eattr *ea; | |
1132 | net *net = e->net; | |
1133 | rta *a = e->attrs; | |
4e276a89 | 1134 | int bufsize = 128 + KRT_METRICS_MAX*8 + nh_bufsize(&(a->nh)); |
4adcb9df | 1135 | u32 priority = 0; |
a8caff32 | 1136 | |
95616c82 OZ |
1137 | struct { |
1138 | struct nlmsghdr h; | |
1139 | struct rtmsg r; | |
a8caff32 MM |
1140 | char buf[0]; |
1141 | } *r; | |
1142 | ||
1143 | int rsize = sizeof(*r) + bufsize; | |
1144 | r = alloca(rsize); | |
95616c82 | 1145 | |
cc5b93f7 | 1146 | DBG("nl_send_route(%N,op=%x)\n", net->n.addr, op); |
95616c82 | 1147 | |
a8caff32 MM |
1148 | bzero(&r->h, sizeof(r->h)); |
1149 | bzero(&r->r, sizeof(r->r)); | |
cc5b93f7 | 1150 | r->h.nlmsg_type = op ? RTM_NEWROUTE : RTM_DELROUTE; |
a8caff32 | 1151 | r->h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
cc5b93f7 | 1152 | r->h.nlmsg_flags = op | NLM_F_REQUEST | NLM_F_ACK; |
95616c82 | 1153 | |
a8caff32 MM |
1154 | r->r.rtm_family = p->af; |
1155 | r->r.rtm_dst_len = net_pxlen(net->n.addr); | |
1156 | r->r.rtm_protocol = RTPROT_BIRD; | |
7074be22 | 1157 | r->r.rtm_scope = RT_SCOPE_NOWHERE; |
d14f8c3c MM |
1158 | if (p->af == AF_MPLS) |
1159 | { | |
1160 | u32 label = net_mpls(net->n.addr); | |
1161 | nl_add_attr_mpls(&r->h, rsize, RTA_DST, 1, &label); | |
1162 | } | |
1163 | else | |
1164 | nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(net->n.addr)); | |
95616c82 | 1165 | |
2feaa693 OZ |
1166 | /* |
1167 | * Strange behavior for RTM_DELROUTE: | |
1168 | * 1) rtm_family is ignored in IPv6, works for IPv4 | |
1169 | * 2) not setting RTA_PRIORITY is different from setting default value (on IPv6) | |
1170 | * 3) not setting RTA_PRIORITY is equivalent to setting 0, which is wildcard | |
1171 | */ | |
1172 | ||
9ddbfbdd | 1173 | if (krt_table_id(p) < 256) |
a8caff32 | 1174 | r->r.rtm_table = krt_table_id(p); |
9ddbfbdd | 1175 | else |
a8caff32 | 1176 | nl_add_attr_u32(&r->h, rsize, RTA_TABLE, krt_table_id(p)); |
9ddbfbdd | 1177 | |
4adcb9df OZ |
1178 | if (a->source == RTS_DUMMY) |
1179 | priority = e->u.krt.metric; | |
1180 | else if (KRT_CF->sys.metric) | |
1181 | priority = KRT_CF->sys.metric; | |
1182 | else if ((op != NL_OP_DELETE) && (ea = ea_find(eattrs, EA_KRT_METRIC))) | |
1183 | priority = ea->u.data; | |
78a2cc28 | 1184 | |
4adcb9df | 1185 | if (priority) |
d1b8fe93 | 1186 | nl_add_attr_u32(&r->h, rsize, RTA_PRIORITY, priority); |
78a2cc28 | 1187 | |
2feaa693 OZ |
1188 | /* For route delete, we do not specify remaining route attributes */ |
1189 | if (op == NL_OP_DELETE) | |
1190 | goto dest; | |
78a2cc28 | 1191 | |
6e75d0d2 OZ |
1192 | /* Default scope is LINK for device routes, UNIVERSE otherwise */ |
1193 | if (ea = ea_find(eattrs, EA_KRT_SCOPE)) | |
cc5b93f7 | 1194 | r->r.rtm_scope = ea->u.data; |
6e75d0d2 | 1195 | else |
4e276a89 | 1196 | r->r.rtm_scope = (dest == RTD_UNICAST && ipa_zero(nh->gw)) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE; |
95616c82 OZ |
1197 | |
1198 | if (ea = ea_find(eattrs, EA_KRT_PREFSRC)) | |
a8caff32 | 1199 | nl_add_attr_ipa(&r->h, rsize, RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data); |
95616c82 OZ |
1200 | |
1201 | if (ea = ea_find(eattrs, EA_KRT_REALM)) | |
a8caff32 | 1202 | nl_add_attr_u32(&r->h, rsize, RTA_FLOW, ea->u.data); |
95616c82 | 1203 | |
9fdf9d29 OZ |
1204 | |
1205 | u32 metrics[KRT_METRICS_MAX]; | |
1206 | metrics[0] = 0; | |
1207 | ||
1208 | struct ea_walk_state ews = { .eattrs = eattrs }; | |
1209 | while (ea = ea_walk(&ews, EA_KRT_METRICS, KRT_METRICS_MAX)) | |
1210 | { | |
1211 | int id = ea->id - EA_KRT_METRICS; | |
1212 | metrics[0] |= 1 << id; | |
1213 | metrics[id] = ea->u.data; | |
1214 | } | |
1215 | ||
1216 | if (metrics[0]) | |
a8caff32 | 1217 | nl_add_metrics(&r->h, rsize, metrics, KRT_METRICS_MAX); |
9fdf9d29 OZ |
1218 | |
1219 | ||
2feaa693 | 1220 | dest: |
2feaa693 | 1221 | switch (dest) |
95616c82 | 1222 | { |
4e276a89 | 1223 | case RTD_UNICAST: |
a8caff32 | 1224 | r->r.rtm_type = RTN_UNICAST; |
4e276a89 | 1225 | if (nh->next && !krt_ecmp6(p)) |
d14f8c3c | 1226 | nl_add_multipath(&r->h, rsize, nh, p->af); |
4e276a89 MM |
1227 | else |
1228 | { | |
1229 | nl_add_attr_u32(&r->h, rsize, RTA_OIF, nh->iface->index); | |
d14f8c3c | 1230 | nl_add_nexthop(&r->h, rsize, nh, p->af); |
4e276a89 | 1231 | } |
95616c82 OZ |
1232 | break; |
1233 | case RTD_BLACKHOLE: | |
a8caff32 | 1234 | r->r.rtm_type = RTN_BLACKHOLE; |
95616c82 OZ |
1235 | break; |
1236 | case RTD_UNREACHABLE: | |
a8caff32 | 1237 | r->r.rtm_type = RTN_UNREACHABLE; |
95616c82 OZ |
1238 | break; |
1239 | case RTD_PROHIBIT: | |
a8caff32 | 1240 | r->r.rtm_type = RTN_PROHIBIT; |
95616c82 | 1241 | break; |
2feaa693 OZ |
1242 | case RTD_NONE: |
1243 | break; | |
95616c82 OZ |
1244 | default: |
1245 | bug("krt_capable inconsistent with nl_send_route"); | |
1246 | } | |
1247 | ||
2feaa693 | 1248 | /* Ignore missing for DELETE */ |
cc5b93f7 | 1249 | return nl_exchange(&r->h, (op == NL_OP_DELETE)); |
2feaa693 OZ |
1250 | } |
1251 | ||
1252 | static inline int | |
1253 | nl_add_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs) | |
1254 | { | |
1255 | rta *a = e->attrs; | |
1256 | int err = 0; | |
1257 | ||
4e276a89 | 1258 | if (krt_ecmp6(p) && a->nh.next) |
2feaa693 | 1259 | { |
4e276a89 | 1260 | struct nexthop *nh = &(a->nh); |
2feaa693 | 1261 | |
4e276a89 | 1262 | err = nl_send_route(p, e, eattrs, NL_OP_ADD, RTD_UNICAST, nh); |
2feaa693 OZ |
1263 | if (err < 0) |
1264 | return err; | |
1265 | ||
1266 | for (nh = nh->next; nh; nh = nh->next) | |
4e276a89 | 1267 | err += nl_send_route(p, e, eattrs, NL_OP_APPEND, RTD_UNICAST, nh); |
2feaa693 OZ |
1268 | |
1269 | return err; | |
1270 | } | |
1271 | ||
4e276a89 | 1272 | return nl_send_route(p, e, eattrs, NL_OP_ADD, a->dest, &(a->nh)); |
2feaa693 OZ |
1273 | } |
1274 | ||
1275 | static inline int | |
1276 | nl_delete_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs) | |
1277 | { | |
1278 | int err = 0; | |
1279 | ||
1280 | /* For IPv6, we just repeatedly request DELETE until we get error */ | |
1281 | do | |
4e276a89 | 1282 | err = nl_send_route(p, e, eattrs, NL_OP_DELETE, RTD_NONE, NULL); |
2feaa693 OZ |
1283 | while (krt_ecmp6(p) && !err); |
1284 | ||
1285 | return err; | |
95616c82 OZ |
1286 | } |
1287 | ||
1288 | void | |
1289 | krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs) | |
1290 | { | |
1291 | int err = 0; | |
1292 | ||
1293 | /* | |
2feaa693 OZ |
1294 | * We could use NL_OP_REPLACE, but route replace on Linux has some problems: |
1295 | * | |
1296 | * 1) Does not check for matching rtm_protocol | |
1297 | * 2) Has broken semantics for IPv6 ECMP | |
1298 | * 3) Crashes some kernel version when used for IPv6 ECMP | |
1299 | * | |
1300 | * So we use NL_OP_DELETE and then NL_OP_ADD. We also do not trust the old | |
1301 | * route value, so we do not try to optimize IPv6 ECMP reconfigurations. | |
95616c82 OZ |
1302 | */ |
1303 | ||
1304 | if (old) | |
2feaa693 | 1305 | nl_delete_rte(p, old, eattrs); |
95616c82 OZ |
1306 | |
1307 | if (new) | |
2feaa693 | 1308 | err = nl_add_rte(p, new, eattrs); |
95616c82 OZ |
1309 | |
1310 | if (err < 0) | |
1311 | n->n.flags |= KRF_SYNC_ERROR; | |
1312 | else | |
1313 | n->n.flags &= ~KRF_SYNC_ERROR; | |
1314 | } | |
1315 | ||
1316 | ||
4e276a89 MM |
1317 | static inline struct nexthop * |
1318 | nl_alloc_nexthop(struct nl_parse_state *s, ip_addr gw, struct iface *iface, byte weight) | |
2feaa693 | 1319 | { |
4e276a89 | 1320 | struct nexthop *nh = lp_alloc(s->pool, sizeof(struct nexthop)); |
2feaa693 OZ |
1321 | |
1322 | nh->gw = gw; | |
1323 | nh->iface = iface; | |
1324 | nh->next = NULL; | |
1325 | nh->weight = weight; | |
1326 | ||
1327 | return nh; | |
1328 | } | |
1329 | ||
1330 | static int | |
1331 | nl_mergable_route(struct nl_parse_state *s, net *net, struct krt_proto *p, uint priority, uint krt_type) | |
1332 | { | |
1333 | /* Route merging must be active */ | |
1334 | if (!s->merge) | |
1335 | return 0; | |
1336 | ||
1337 | /* Saved and new route must have same network, proto/table, and priority */ | |
1338 | if ((s->net != net) || (s->proto != p) || (s->krt_metric != priority)) | |
1339 | return 0; | |
1340 | ||
1341 | /* Both must be regular unicast routes */ | |
1342 | if ((s->krt_type != RTN_UNICAST) || (krt_type != RTN_UNICAST)) | |
1343 | return 0; | |
1344 | ||
1345 | return 1; | |
1346 | } | |
1347 | ||
1348 | static void | |
1349 | nl_announce_route(struct nl_parse_state *s) | |
1350 | { | |
1351 | rte *e = rte_get_temp(s->attrs); | |
1352 | e->net = s->net; | |
1353 | e->u.krt.src = s->krt_src; | |
1354 | e->u.krt.proto = s->krt_proto; | |
1355 | e->u.krt.seen = 0; | |
1356 | e->u.krt.best = 0; | |
1357 | e->u.krt.metric = s->krt_metric; | |
1358 | ||
1359 | if (s->scan) | |
1360 | krt_got_route(s->proto, e); | |
1361 | else | |
1362 | krt_got_route_async(s->proto, e, s->new); | |
1363 | ||
1364 | s->net = NULL; | |
1365 | s->attrs = NULL; | |
1366 | s->proto = NULL; | |
1367 | lp_flush(s->pool); | |
1368 | } | |
1369 | ||
1370 | static inline void | |
1371 | nl_parse_begin(struct nl_parse_state *s, int scan, int merge) | |
1372 | { | |
1373 | memset(s, 0, sizeof (struct nl_parse_state)); | |
1374 | s->pool = nl_linpool; | |
1375 | s->scan = scan; | |
1376 | s->merge = merge; | |
1377 | } | |
1378 | ||
1379 | static inline void | |
1380 | nl_parse_end(struct nl_parse_state *s) | |
1381 | { | |
1382 | if (s->net) | |
1383 | nl_announce_route(s); | |
1384 | } | |
1385 | ||
1386 | ||
95616c82 OZ |
1387 | #define SKIP(ARG...) do { DBG("KRT: Ignoring route - " ARG); return; } while(0) |
1388 | ||
1389 | static void | |
2feaa693 | 1390 | nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h) |
95616c82 OZ |
1391 | { |
1392 | struct krt_proto *p; | |
1393 | struct rtmsg *i; | |
ad276157 | 1394 | struct rtattr *a[BIRD_RTA_MAX]; |
95616c82 OZ |
1395 | int new = h->nlmsg_type == RTM_NEWROUTE; |
1396 | ||
29a64162 | 1397 | net_addr dst; |
95616c82 | 1398 | u32 oif = ~0; |
29a64162 | 1399 | u32 table_id; |
2feaa693 | 1400 | u32 priority = 0; |
6e75d0d2 | 1401 | u32 def_scope = RT_SCOPE_UNIVERSE; |
95616c82 OZ |
1402 | int src; |
1403 | ||
ad276157 | 1404 | if (!(i = nl_checkin(h, sizeof(*i)))) |
95616c82 | 1405 | return; |
ad276157 MM |
1406 | |
1407 | switch (i->rtm_family) | |
95616c82 | 1408 | { |
29a64162 OZ |
1409 | case AF_INET: |
1410 | if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want4, a, sizeof(a))) | |
1411 | return; | |
1412 | ||
1413 | if (a[RTA_DST]) | |
1414 | net_fill_ip4(&dst, rta_get_ip4(a[RTA_DST]), i->rtm_dst_len); | |
1415 | else | |
1416 | net_fill_ip4(&dst, IP4_NONE, 0); | |
1417 | break; | |
1418 | ||
cc5b93f7 OZ |
1419 | case AF_INET6: |
1420 | if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a))) | |
1421 | return; | |
29a64162 OZ |
1422 | |
1423 | if (a[RTA_DST]) | |
1424 | net_fill_ip6(&dst, rta_get_ip6(a[RTA_DST]), i->rtm_dst_len); | |
1425 | else | |
1426 | net_fill_ip6(&dst, IP6_NONE, 0); | |
1427 | break; | |
1428 | ||
d14f8c3c MM |
1429 | case AF_MPLS: |
1430 | if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want_mpls, a, sizeof(a))) | |
1431 | return; | |
1432 | ||
ed610044 OZ |
1433 | if (!a[RTA_DST]) |
1434 | SKIP("MPLS route without RTA_DST"); | |
1435 | ||
1436 | if (rta_get_mpls(a[RTA_DST], rta_mpls_stack) != 1) | |
1437 | SKIP("MPLS route with multi-label RTA_DST"); | |
1438 | ||
1439 | net_fill_mpls(&dst, rta_mpls_stack[0]); | |
d14f8c3c MM |
1440 | break; |
1441 | ||
29a64162 OZ |
1442 | default: |
1443 | return; | |
95616c82 OZ |
1444 | } |
1445 | ||
95616c82 | 1446 | if (a[RTA_OIF]) |
acb04cfd | 1447 | oif = rta_get_u32(a[RTA_OIF]); |
95616c82 | 1448 | |
9ddbfbdd | 1449 | if (a[RTA_TABLE]) |
29a64162 | 1450 | table_id = rta_get_u32(a[RTA_TABLE]); |
9ddbfbdd | 1451 | else |
29a64162 | 1452 | table_id = i->rtm_table; |
9ddbfbdd | 1453 | |
29a64162 OZ |
1454 | /* Do we know this table? */ |
1455 | p = HASH_FIND(nl_table_map, RTH, i->rtm_family, table_id); | |
95616c82 | 1456 | if (!p) |
9ddbfbdd | 1457 | SKIP("unknown table %d\n", table); |
95616c82 | 1458 | |
95616c82 OZ |
1459 | if (a[RTA_IIF]) |
1460 | SKIP("IIF set\n"); | |
29a64162 | 1461 | |
95616c82 OZ |
1462 | if (i->rtm_tos != 0) /* We don't support TOS */ |
1463 | SKIP("TOS %02x\n", i->rtm_tos); | |
95616c82 | 1464 | |
2feaa693 | 1465 | if (s->scan && !new) |
95616c82 OZ |
1466 | SKIP("RTM_DELROUTE in scan\n"); |
1467 | ||
2feaa693 OZ |
1468 | if (a[RTA_PRIORITY]) |
1469 | priority = rta_get_u32(a[RTA_PRIORITY]); | |
1470 | ||
9b136840 | 1471 | int c = net_classify(&dst); |
95616c82 OZ |
1472 | if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK)) |
1473 | SKIP("strange class/scope\n"); | |
1474 | ||
95616c82 OZ |
1475 | switch (i->rtm_protocol) |
1476 | { | |
1477 | case RTPROT_UNSPEC: | |
1478 | SKIP("proto unspec\n"); | |
1479 | ||
1480 | case RTPROT_REDIRECT: | |
1481 | src = KRT_SRC_REDIRECT; | |
1482 | break; | |
1483 | ||
1484 | case RTPROT_KERNEL: | |
1485 | src = KRT_SRC_KERNEL; | |
1486 | return; | |
1487 | ||
1488 | case RTPROT_BIRD: | |
2feaa693 | 1489 | if (!s->scan) |
95616c82 OZ |
1490 | SKIP("echo\n"); |
1491 | src = KRT_SRC_BIRD; | |
1492 | break; | |
1493 | ||
1494 | case RTPROT_BOOT: | |
1495 | default: | |
1496 | src = KRT_SRC_ALIEN; | |
1497 | } | |
1498 | ||
f4a60a9b | 1499 | net *net = net_get(p->p.main_channel->table, &dst); |
95616c82 | 1500 | |
2feaa693 OZ |
1501 | if (s->net && !nl_mergable_route(s, net, p, priority, i->rtm_type)) |
1502 | nl_announce_route(s); | |
1503 | ||
d14f8c3c | 1504 | rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE); |
2feaa693 OZ |
1505 | ra->src = p->p.main_source; |
1506 | ra->source = RTS_INHERIT; | |
1507 | ra->scope = SCOPE_UNIVERSE; | |
95616c82 OZ |
1508 | |
1509 | switch (i->rtm_type) | |
1510 | { | |
1511 | case RTN_UNICAST: | |
62e64905 | 1512 | ra->dest = RTD_UNICAST; |
95616c82 | 1513 | |
ad276157 | 1514 | if (a[RTA_MULTIPATH] && (i->rtm_family == AF_INET)) |
95616c82 | 1515 | { |
4e276a89 MM |
1516 | struct nexthop *nh = nl_parse_multipath(p, a[RTA_MULTIPATH]); |
1517 | if (!nh) | |
95616c82 | 1518 | { |
fe9f1a6d | 1519 | log(L_ERR "KRT: Received strange multipath route %N", net->n.addr); |
95616c82 OZ |
1520 | return; |
1521 | } | |
9fdf9d29 | 1522 | |
62e64905 | 1523 | ra->nh = *nh; |
95616c82 OZ |
1524 | break; |
1525 | } | |
1526 | ||
4e276a89 MM |
1527 | ra->nh.iface = if_find_by_index(oif); |
1528 | if (!ra->nh.iface) | |
95616c82 | 1529 | { |
fe9f1a6d | 1530 | log(L_ERR "KRT: Received route %N with unknown ifindex %u", net->n.addr, oif); |
95616c82 OZ |
1531 | return; |
1532 | } | |
1533 | ||
d14f8c3c | 1534 | if ((i->rtm_family != AF_MPLS) && a[RTA_GATEWAY] || (i->rtm_family == AF_MPLS) && a[RTA_VIA]) |
95616c82 | 1535 | { |
d14f8c3c MM |
1536 | if (i->rtm_family == AF_MPLS) |
1537 | ra->nh.gw = rta_get_via(a[RTA_VIA]); | |
1538 | else | |
1539 | ra->nh.gw = rta_get_ipa(a[RTA_GATEWAY]); | |
95616c82 OZ |
1540 | |
1541 | /* Silently skip strange 6to4 routes */ | |
0bf95f99 | 1542 | const net_addr_ip6 sit = NET_ADDR_IP6(IP6_NONE, 96); |
4e276a89 | 1543 | if ((i->rtm_family == AF_INET6) && ipa_in_netX(ra->nh.gw, (net_addr *) &sit)) |
95616c82 OZ |
1544 | return; |
1545 | ||
23c212e7 | 1546 | neighbor *nbr; |
d14f8c3c | 1547 | nbr = neigh_find2(&p->p, &(ra->nh.gw), ra->nh.iface, |
23c212e7 OZ |
1548 | (i->rtm_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0); |
1549 | if (!nbr || (nbr->scope == SCOPE_HOST)) | |
95616c82 | 1550 | { |
4e276a89 MM |
1551 | log(L_ERR "KRT: Received route %N with strange next-hop %I", net->n.addr, |
1552 | ra->nh.gw); | |
95616c82 OZ |
1553 | return; |
1554 | } | |
1555 | } | |
95616c82 OZ |
1556 | |
1557 | break; | |
1558 | case RTN_BLACKHOLE: | |
2feaa693 | 1559 | ra->dest = RTD_BLACKHOLE; |
95616c82 OZ |
1560 | break; |
1561 | case RTN_UNREACHABLE: | |
2feaa693 | 1562 | ra->dest = RTD_UNREACHABLE; |
95616c82 OZ |
1563 | break; |
1564 | case RTN_PROHIBIT: | |
2feaa693 | 1565 | ra->dest = RTD_PROHIBIT; |
95616c82 OZ |
1566 | break; |
1567 | /* FIXME: What about RTN_THROW? */ | |
1568 | default: | |
1569 | SKIP("type %d\n", i->rtm_type); | |
1570 | return; | |
1571 | } | |
1572 | ||
d14f8c3c MM |
1573 | int labels = 0; |
1574 | if ((i->rtm_family == AF_MPLS) && a[RTA_NEWDST] && !ra->nh.next) | |
1575 | labels = rta_get_mpls(a[RTA_NEWDST], ra->nh.label); | |
1576 | ||
1577 | if (a[RTA_ENCAP] && a[RTA_ENCAP_TYPE] && !ra->nh.next) | |
1578 | { | |
1579 | switch (rta_get_u16(a[RTA_ENCAP_TYPE])) | |
1580 | { | |
1581 | case LWTUNNEL_ENCAP_MPLS: | |
1582 | { | |
1583 | struct rtattr *enca[BIRD_RTA_MAX]; | |
1584 | nl_attr_len = RTA_PAYLOAD(a[RTA_ENCAP]); | |
1585 | nl_parse_attrs(RTA_DATA(a[RTA_ENCAP]), encap_mpls_want, enca, sizeof(enca)); | |
1586 | labels = rta_get_mpls(enca[RTA_DST], ra->nh.label); | |
1587 | break; | |
1588 | } | |
1589 | default: | |
1590 | SKIP("unknown encapsulation method %d\n", rta_get_u16(a[RTA_ENCAP_TYPE])); | |
1591 | break; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | if (labels < 0) | |
1596 | { | |
1597 | log(L_WARN "KRT: Too long MPLS stack received, ignoring."); | |
1598 | ra->nh.labels = 0; | |
1599 | } | |
1600 | else | |
1601 | ra->nh.labels = labels; | |
1602 | ||
1603 | rte *e = rte_get_temp(ra); | |
1604 | e->net = net; | |
1605 | e->u.krt.src = src; | |
1606 | e->u.krt.proto = i->rtm_protocol; | |
1607 | e->u.krt.seen = 0; | |
1608 | e->u.krt.best = 0; | |
1609 | e->u.krt.metric = 0; | |
1610 | ||
6e75d0d2 OZ |
1611 | if (i->rtm_scope != def_scope) |
1612 | { | |
1613 | ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr)); | |
1614 | ea->next = ra->eattrs; | |
1615 | ra->eattrs = ea; | |
1616 | ea->flags = EALF_SORTED; | |
1617 | ea->count = 1; | |
1618 | ea->attrs[0].id = EA_KRT_SCOPE; | |
1619 | ea->attrs[0].flags = 0; | |
1620 | ea->attrs[0].type = EAF_TYPE_INT; | |
1621 | ea->attrs[0].u.data = i->rtm_scope; | |
1622 | } | |
95616c82 | 1623 | |
d14f8c3c MM |
1624 | if (a[RTA_PRIORITY]) |
1625 | e->u.krt.metric = rta_get_u32(a[RTA_PRIORITY]); | |
1626 | ||
95616c82 OZ |
1627 | if (a[RTA_PREFSRC]) |
1628 | { | |
9b136840 | 1629 | ip_addr ps = rta_get_ipa(a[RTA_PREFSRC]); |
95616c82 | 1630 | |
2feaa693 OZ |
1631 | ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr)); |
1632 | ea->next = ra->eattrs; | |
1633 | ra->eattrs = ea; | |
95616c82 OZ |
1634 | ea->flags = EALF_SORTED; |
1635 | ea->count = 1; | |
1636 | ea->attrs[0].id = EA_KRT_PREFSRC; | |
1637 | ea->attrs[0].flags = 0; | |
1638 | ea->attrs[0].type = EAF_TYPE_IP_ADDRESS; | |
2feaa693 | 1639 | ea->attrs[0].u.ptr = lp_alloc(s->pool, sizeof(struct adata) + sizeof(ps)); |
95616c82 OZ |
1640 | ea->attrs[0].u.ptr->length = sizeof(ps); |
1641 | memcpy(ea->attrs[0].u.ptr->data, &ps, sizeof(ps)); | |
1642 | } | |
1643 | ||
1644 | if (a[RTA_FLOW]) | |
1645 | { | |
2feaa693 OZ |
1646 | ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr)); |
1647 | ea->next = ra->eattrs; | |
1648 | ra->eattrs = ea; | |
95616c82 OZ |
1649 | ea->flags = EALF_SORTED; |
1650 | ea->count = 1; | |
1651 | ea->attrs[0].id = EA_KRT_REALM; | |
1652 | ea->attrs[0].flags = 0; | |
1653 | ea->attrs[0].type = EAF_TYPE_INT; | |
acb04cfd | 1654 | ea->attrs[0].u.data = rta_get_u32(a[RTA_FLOW]); |
95616c82 OZ |
1655 | } |
1656 | ||
9fdf9d29 OZ |
1657 | if (a[RTA_METRICS]) |
1658 | { | |
1659 | u32 metrics[KRT_METRICS_MAX]; | |
2feaa693 | 1660 | ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + KRT_METRICS_MAX * sizeof(eattr)); |
9fdf9d29 OZ |
1661 | int t, n = 0; |
1662 | ||
1663 | if (nl_parse_metrics(a[RTA_METRICS], metrics, ARRAY_SIZE(metrics)) < 0) | |
1664 | { | |
fe9f1a6d | 1665 | log(L_ERR "KRT: Received route %N with strange RTA_METRICS attribute", net->n.addr); |
9fdf9d29 OZ |
1666 | return; |
1667 | } | |
1668 | ||
1669 | for (t = 1; t < KRT_METRICS_MAX; t++) | |
1670 | if (metrics[0] & (1 << t)) | |
1671 | { | |
1672 | ea->attrs[n].id = EA_CODE(EAP_KRT, KRT_METRICS_OFFSET + t); | |
1673 | ea->attrs[n].flags = 0; | |
1674 | ea->attrs[n].type = EAF_TYPE_INT; /* FIXME: Some are EAF_TYPE_BITFIELD */ | |
1675 | ea->attrs[n].u.data = metrics[t]; | |
1676 | n++; | |
1677 | } | |
1678 | ||
1679 | if (n > 0) | |
1680 | { | |
2feaa693 | 1681 | ea->next = ra->eattrs; |
9fdf9d29 OZ |
1682 | ea->flags = EALF_SORTED; |
1683 | ea->count = n; | |
2feaa693 | 1684 | ra->eattrs = ea; |
9fdf9d29 OZ |
1685 | } |
1686 | } | |
1687 | ||
2feaa693 OZ |
1688 | /* |
1689 | * Ideally, now we would send the received route to the rest of kernel code. | |
1690 | * But IPv6 ECMP routes are sent as a sequence of routes, so we postpone it | |
1691 | * and merge next hops until the end of the sequence. | |
1692 | */ | |
1693 | ||
1694 | if (!s->net) | |
1695 | { | |
1696 | /* Store the new route */ | |
1697 | s->net = net; | |
1698 | s->attrs = ra; | |
1699 | s->proto = p; | |
1700 | s->new = new; | |
1701 | s->krt_src = src; | |
1702 | s->krt_type = i->rtm_type; | |
1703 | s->krt_proto = i->rtm_protocol; | |
1704 | s->krt_metric = priority; | |
1705 | } | |
95616c82 | 1706 | else |
2feaa693 OZ |
1707 | { |
1708 | /* Merge next hops with the stored route */ | |
62e64905 | 1709 | rta *oa = s->attrs; |
2feaa693 | 1710 | |
62e64905 OZ |
1711 | struct nexthop *nhs = &oa->nh; |
1712 | nexthop_insert(&nhs, &ra->nh); | |
1713 | ||
1714 | /* Perhaps new nexthop is inserted at the first position */ | |
1715 | if (nhs == &ra->nh) | |
1716 | { | |
1717 | /* Swap rtas */ | |
1718 | s->attrs = ra; | |
1719 | ||
1720 | /* Keep old eattrs */ | |
1721 | ra->eattrs = oa->eattrs; | |
1722 | } | |
2feaa693 | 1723 | } |
95616c82 OZ |
1724 | } |
1725 | ||
1726 | void | |
1727 | krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NULL */ | |
1728 | { | |
1729 | struct nlmsghdr *h; | |
2feaa693 | 1730 | struct nl_parse_state s; |
95616c82 | 1731 | |
cc5b93f7 | 1732 | nl_parse_begin(&s, 1, 0); |
d7661fbe | 1733 | nl_request_dump(AF_INET, RTM_GETROUTE); |
95616c82 OZ |
1734 | while (h = nl_get_scan()) |
1735 | if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE) | |
2feaa693 | 1736 | nl_parse_route(&s, h); |
95616c82 OZ |
1737 | else |
1738 | log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type); | |
cc5b93f7 | 1739 | nl_parse_end(&s); |
29a64162 | 1740 | |
cc5b93f7 | 1741 | nl_parse_begin(&s, 1, 1); |
d7661fbe MM |
1742 | nl_request_dump(AF_INET6, RTM_GETROUTE); |
1743 | while (h = nl_get_scan()) | |
1744 | if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE) | |
cc5b93f7 | 1745 | nl_parse_route(&s, h); |
d7661fbe MM |
1746 | else |
1747 | log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type); | |
2feaa693 | 1748 | nl_parse_end(&s); |
d14f8c3c MM |
1749 | |
1750 | nl_parse_begin(&s, 1, 1); | |
1751 | nl_request_dump(AF_MPLS, RTM_GETROUTE); | |
1752 | while (h = nl_get_scan()) | |
1753 | if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE) | |
1754 | nl_parse_route(&s, h); | |
1755 | else | |
1756 | log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type); | |
1757 | nl_parse_end(&s); | |
95616c82 OZ |
1758 | } |
1759 | ||
1760 | /* | |
1761 | * Asynchronous Netlink interface | |
1762 | */ | |
1763 | ||
1764 | static sock *nl_async_sk; /* BIRD socket for asynchronous notifications */ | |
1765 | static byte *nl_async_rx_buffer; /* Receive buffer */ | |
1766 | ||
1767 | static void | |
1768 | nl_async_msg(struct nlmsghdr *h) | |
1769 | { | |
2feaa693 OZ |
1770 | struct nl_parse_state s; |
1771 | ||
95616c82 OZ |
1772 | switch (h->nlmsg_type) |
1773 | { | |
1774 | case RTM_NEWROUTE: | |
1775 | case RTM_DELROUTE: | |
1776 | DBG("KRT: Received async route notification (%d)\n", h->nlmsg_type); | |
2feaa693 OZ |
1777 | nl_parse_begin(&s, 0, 0); |
1778 | nl_parse_route(&s, h); | |
1779 | nl_parse_end(&s); | |
95616c82 OZ |
1780 | break; |
1781 | case RTM_NEWLINK: | |
1782 | case RTM_DELLINK: | |
1783 | DBG("KRT: Received async link notification (%d)\n", h->nlmsg_type); | |
1e4891e4 OZ |
1784 | if (kif_proto) |
1785 | nl_parse_link(h, 0); | |
95616c82 OZ |
1786 | break; |
1787 | case RTM_NEWADDR: | |
1788 | case RTM_DELADDR: | |
1789 | DBG("KRT: Received async address notification (%d)\n", h->nlmsg_type); | |
1e4891e4 OZ |
1790 | if (kif_proto) |
1791 | nl_parse_addr(h, 0); | |
95616c82 OZ |
1792 | break; |
1793 | default: | |
1794 | DBG("KRT: Received unknown async notification (%d)\n", h->nlmsg_type); | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | static int | |
3e236955 | 1799 | nl_async_hook(sock *sk, uint size UNUSED) |
95616c82 OZ |
1800 | { |
1801 | struct iovec iov = { nl_async_rx_buffer, NL_RX_SIZE }; | |
1802 | struct sockaddr_nl sa; | |
31e9e101 ST |
1803 | struct msghdr m = { |
1804 | .msg_name = &sa, | |
1805 | .msg_namelen = sizeof(sa), | |
1806 | .msg_iov = &iov, | |
1807 | .msg_iovlen = 1, | |
1808 | }; | |
95616c82 OZ |
1809 | struct nlmsghdr *h; |
1810 | int x; | |
ae80a2de | 1811 | uint len; |
95616c82 OZ |
1812 | |
1813 | x = recvmsg(sk->fd, &m, 0); | |
1814 | if (x < 0) | |
1815 | { | |
1816 | if (errno == ENOBUFS) | |
1817 | { | |
1818 | /* | |
1819 | * Netlink reports some packets have been thrown away. | |
1820 | * One day we might react to it by asking for route table | |
1821 | * scan in near future. | |
1822 | */ | |
2c33da50 | 1823 | log(L_WARN "Kernel dropped some netlink messages, will resync on next scan."); |
95616c82 OZ |
1824 | return 1; /* More data are likely to be ready */ |
1825 | } | |
1826 | else if (errno != EWOULDBLOCK) | |
1827 | log(L_ERR "Netlink recvmsg: %m"); | |
1828 | return 0; | |
1829 | } | |
1830 | if (sa.nl_pid) /* It isn't from the kernel */ | |
1831 | { | |
1832 | DBG("Non-kernel packet\n"); | |
1833 | return 1; | |
1834 | } | |
1835 | h = (void *) nl_async_rx_buffer; | |
1836 | len = x; | |
1837 | if (m.msg_flags & MSG_TRUNC) | |
1838 | { | |
1839 | log(L_WARN "Netlink got truncated asynchronous message"); | |
1840 | return 1; | |
1841 | } | |
1842 | while (NLMSG_OK(h, len)) | |
1843 | { | |
1844 | nl_async_msg(h); | |
1845 | h = NLMSG_NEXT(h, len); | |
1846 | } | |
1847 | if (len) | |
1848 | log(L_WARN "nl_async_hook: Found packet remnant of size %d", len); | |
1849 | return 1; | |
1850 | } | |
1851 | ||
ccd2a3ed MM |
1852 | static void |
1853 | nl_async_err_hook(sock *sk, int e UNUSED) | |
1854 | { | |
1855 | nl_async_hook(sk, 0); | |
1856 | } | |
1857 | ||
95616c82 OZ |
1858 | static void |
1859 | nl_open_async(void) | |
1860 | { | |
1861 | sock *sk; | |
1862 | struct sockaddr_nl sa; | |
1863 | int fd; | |
95616c82 | 1864 | |
f83ce94d | 1865 | if (nl_async_sk) |
95616c82 | 1866 | return; |
95616c82 OZ |
1867 | |
1868 | DBG("KRT: Opening async netlink socket\n"); | |
1869 | ||
1870 | fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); | |
1871 | if (fd < 0) | |
1872 | { | |
1873 | log(L_ERR "Unable to open asynchronous rtnetlink socket: %m"); | |
1874 | return; | |
1875 | } | |
1876 | ||
1877 | bzero(&sa, sizeof(sa)); | |
1878 | sa.nl_family = AF_NETLINK; | |
29a64162 OZ |
1879 | sa.nl_groups = RTMGRP_LINK | |
1880 | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE | | |
1881 | RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE; | |
1882 | ||
95616c82 OZ |
1883 | if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) |
1884 | { | |
1885 | log(L_ERR "Unable to bind asynchronous rtnetlink socket: %m"); | |
f83ce94d | 1886 | close(fd); |
95616c82 OZ |
1887 | return; |
1888 | } | |
1889 | ||
f83ce94d OZ |
1890 | nl_async_rx_buffer = xmalloc(NL_RX_SIZE); |
1891 | ||
95616c82 OZ |
1892 | sk = nl_async_sk = sk_new(krt_pool); |
1893 | sk->type = SK_MAGIC; | |
1894 | sk->rx_hook = nl_async_hook; | |
ccd2a3ed | 1895 | sk->err_hook = nl_async_err_hook; |
95616c82 | 1896 | sk->fd = fd; |
05476c4d | 1897 | if (sk_open(sk) < 0) |
95616c82 | 1898 | bug("Netlink: sk_open failed"); |
95616c82 OZ |
1899 | } |
1900 | ||
9ddbfbdd | 1901 | |
95616c82 OZ |
1902 | /* |
1903 | * Interface to the UNIX krt module | |
1904 | */ | |
1905 | ||
95616c82 | 1906 | void |
9ddbfbdd MM |
1907 | krt_sys_io_init(void) |
1908 | { | |
2feaa693 | 1909 | nl_linpool = lp_new(krt_pool, 4080); |
9ddbfbdd MM |
1910 | HASH_INIT(nl_table_map, krt_pool, 6); |
1911 | } | |
1912 | ||
1913 | int | |
c6964c30 | 1914 | krt_sys_start(struct krt_proto *p) |
95616c82 | 1915 | { |
29a64162 | 1916 | struct krt_proto *old = HASH_FIND(nl_table_map, RTH, p->af, krt_table_id(p)); |
9ddbfbdd MM |
1917 | |
1918 | if (old) | |
1919 | { | |
1920 | log(L_ERR "%s: Kernel table %u already registered by %s", | |
1921 | p->p.name, krt_table_id(p), old->p.name); | |
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | HASH_INSERT2(nl_table_map, RTH, krt_pool, p); | |
c6964c30 OZ |
1926 | |
1927 | nl_open(); | |
1928 | nl_open_async(); | |
9ddbfbdd MM |
1929 | |
1930 | return 1; | |
95616c82 OZ |
1931 | } |
1932 | ||
1933 | void | |
9ddbfbdd | 1934 | krt_sys_shutdown(struct krt_proto *p) |
95616c82 | 1935 | { |
9ddbfbdd | 1936 | HASH_REMOVE2(nl_table_map, RTH, krt_pool, p); |
95616c82 OZ |
1937 | } |
1938 | ||
1939 | int | |
1940 | krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o) | |
1941 | { | |
4adcb9df | 1942 | return (n->sys.table_id == o->sys.table_id) && (n->sys.metric == o->sys.metric); |
95616c82 OZ |
1943 | } |
1944 | ||
95616c82 OZ |
1945 | void |
1946 | krt_sys_init_config(struct krt_config *cf) | |
1947 | { | |
1948 | cf->sys.table_id = RT_TABLE_MAIN; | |
bff21441 | 1949 | cf->sys.metric = 32; |
95616c82 OZ |
1950 | } |
1951 | ||
1952 | void | |
1953 | krt_sys_copy_config(struct krt_config *d, struct krt_config *s) | |
1954 | { | |
1955 | d->sys.table_id = s->sys.table_id; | |
4adcb9df | 1956 | d->sys.metric = s->sys.metric; |
95616c82 OZ |
1957 | } |
1958 | ||
9fdf9d29 OZ |
1959 | static const char *krt_metrics_names[KRT_METRICS_MAX] = { |
1960 | NULL, "lock", "mtu", "window", "rtt", "rttvar", "sstresh", "cwnd", "advmss", | |
1961 | "reordering", "hoplimit", "initcwnd", "features", "rto_min", "initrwnd", "quickack" | |
1962 | }; | |
1963 | ||
1964 | static const char *krt_features_names[KRT_FEATURES_MAX] = { | |
1965 | "ecn", NULL, NULL, "allfrag" | |
1966 | }; | |
1967 | ||
1968 | int | |
1969 | krt_sys_get_attr(eattr *a, byte *buf, int buflen UNUSED) | |
1970 | { | |
1971 | switch (a->id) | |
1972 | { | |
1973 | case EA_KRT_PREFSRC: | |
1974 | bsprintf(buf, "prefsrc"); | |
1975 | return GA_NAME; | |
1976 | ||
1977 | case EA_KRT_REALM: | |
1978 | bsprintf(buf, "realm"); | |
1979 | return GA_NAME; | |
1980 | ||
6e75d0d2 OZ |
1981 | case EA_KRT_SCOPE: |
1982 | bsprintf(buf, "scope"); | |
1983 | return GA_NAME; | |
1984 | ||
9fdf9d29 OZ |
1985 | case EA_KRT_LOCK: |
1986 | buf += bsprintf(buf, "lock:"); | |
1987 | ea_format_bitfield(a, buf, buflen, krt_metrics_names, 2, KRT_METRICS_MAX); | |
1988 | return GA_FULL; | |
1989 | ||
1990 | case EA_KRT_FEATURES: | |
1991 | buf += bsprintf(buf, "features:"); | |
1992 | ea_format_bitfield(a, buf, buflen, krt_features_names, 0, KRT_FEATURES_MAX); | |
1993 | return GA_FULL; | |
1994 | ||
1995 | default:; | |
1996 | int id = (int)EA_ID(a->id) - KRT_METRICS_OFFSET; | |
1997 | if (id > 0 && id < KRT_METRICS_MAX) | |
1998 | { | |
1999 | bsprintf(buf, "%s", krt_metrics_names[id]); | |
2000 | return GA_NAME; | |
2001 | } | |
2002 | ||
2003 | return GA_UNKNOWN; | |
2004 | } | |
2005 | } | |
2006 | ||
95616c82 OZ |
2007 | |
2008 | ||
2009 | void | |
2010 | kif_sys_start(struct kif_proto *p UNUSED) | |
2011 | { | |
2012 | nl_open(); | |
2013 | nl_open_async(); | |
2014 | } | |
2015 | ||
2016 | void | |
2017 | kif_sys_shutdown(struct kif_proto *p UNUSED) | |
2018 | { | |
2019 | } |