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code style scripts/checkpatch.pl (linux-3.9-rc1) formatting
[linux-2.6.34.14-moxart.git] / net / dccp / ipv6.c
blobfec7de6cfe6e1ed8e6998b1dd2af2a742bc6ff73
1 /*
2 * DCCP over IPv6
3 * Linux INET6 implementation
4 *
5 * Based on net/dccp6/ipv6.c
6 *
7 * Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15 #include <linux/module.h>
16 #include <linux/random.h>
17 #include <linux/slab.h>
18 #include <linux/xfrm.h>
19
20 #include <net/addrconf.h>
21 #include <net/inet_common.h>
22 #include <net/inet_hashtables.h>
23 #include <net/inet_sock.h>
24 #include <net/inet6_connection_sock.h>
25 #include <net/inet6_hashtables.h>
26 #include <net/ip6_route.h>
27 #include <net/ipv6.h>
28 #include <net/protocol.h>
29 #include <net/transp_v6.h>
30 #include <net/ip6_checksum.h>
31 #include <net/xfrm.h>
32 #include <net/secure_seq.h>
33
34 #include "dccp.h"
35 #include "ipv6.h"
36 #include "feat.h"
37
38 /* The per-net dccp.v6_ctl_sk is used for sending RSTs and ACKs */
39
40 static const struct inet_connection_sock_af_ops dccp_ipv6_mapped;
41 static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops;
42
43 static void dccp_v6_hash(struct sock *sk)
44 {
45 if (sk->sk_state != DCCP_CLOSED) {
46 if (inet_csk(sk)->icsk_af_ops == &dccp_ipv6_mapped) {
47 inet_hash(sk);
48 return;
49 }
50 local_bh_disable();
51 __inet6_hash(sk, NULL);
52 local_bh_enable();
53 }
54 }
55
56 /* add pseudo-header to DCCP checksum stored in skb->csum */
57 static inline __sum16 dccp_v6_csum_finish(struct sk_buff *skb,
58 struct in6_addr *saddr,
59 struct in6_addr *daddr)
60 {
61 return csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_DCCP, skb->csum);
62 }
63
64 static inline void dccp_v6_send_check(struct sock *sk, int unused_value,
65 struct sk_buff *skb)
66 {
67 struct ipv6_pinfo *np = inet6_sk(sk);
68 struct dccp_hdr *dh = dccp_hdr(skb);
69
70 dccp_csum_outgoing(skb);
71 dh->dccph_checksum = dccp_v6_csum_finish(skb, &np->saddr, &np->daddr);
72 }
73
74 static inline __u64 dccp_v6_init_sequence(struct sk_buff *skb)
75 {
76 return secure_dccpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,
77 ipv6_hdr(skb)->saddr.s6_addr32,
78 dccp_hdr(skb)->dccph_dport,
79 dccp_hdr(skb)->dccph_sport );
80
81 }
82
83 static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
84 u8 type, u8 code, int offset, __be32 info)
85 {
86 struct ipv6hdr *hdr = (struct ipv6hdr *)skb->data;
87 const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
88 struct dccp_sock *dp;
89 struct ipv6_pinfo *np;
90 struct sock *sk;
91 int err;
92 __u64 seq;
93 struct net *net = dev_net(skb->dev);
94
95 if (skb->len < offset + sizeof(*dh) ||
96 skb->len < offset + __dccp_basic_hdr_len(dh)) {
97 ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),
98 ICMP6_MIB_INERRORS);
99 return;
100 }
101
102 sk = inet6_lookup(net, &dccp_hashinfo,
103 &hdr->daddr, dh->dccph_dport,
104 &hdr->saddr, dh->dccph_sport, inet6_iif(skb));
105
106 if (sk == NULL) {
107 ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),
108 ICMP6_MIB_INERRORS);
109 return;
110 }
111
112 if (sk->sk_state == DCCP_TIME_WAIT) {
113 inet_twsk_put(inet_twsk(sk));
114 return;
115 }
116
117 bh_lock_sock(sk);
118 if (sock_owned_by_user(sk))
119 NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS);
120
121 if (sk->sk_state == DCCP_CLOSED)
122 goto out;
123
124 dp = dccp_sk(sk);
125 seq = dccp_hdr_seq(dh);
126 if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) &&
127 !between48(seq, dp->dccps_awl, dp->dccps_awh)) {
128 NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
129 goto out;
130 }
131
132 np = inet6_sk(sk);
133
134 if (type == ICMPV6_PKT_TOOBIG) {
135 struct dst_entry *dst = NULL;
136
137 if (sock_owned_by_user(sk))
138 goto out;
139 if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED))
140 goto out;
141
142 /* icmp should have updated the destination cache entry */
143 dst = __sk_dst_check(sk, np->dst_cookie);
144 if (dst == NULL) {
145 struct inet_sock *inet = inet_sk(sk);
146 struct flowi fl;
147
148 /* BUGGG_FUTURE: Again, it is not clear how
149 to handle rthdr case. Ignore this complexity
150 for now.
151 */
152 memset(&fl, 0, sizeof(fl));
153 fl.proto = IPPROTO_DCCP;
154 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
155 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
156 fl.oif = sk->sk_bound_dev_if;
157 fl.fl_ip_dport = inet->inet_dport;
158 fl.fl_ip_sport = inet->inet_sport;
159 security_sk_classify_flow(sk, &fl);
160
161 err = ip6_dst_lookup(sk, &dst, &fl);
162 if (err) {
163 sk->sk_err_soft = -err;
164 goto out;
165 }
166
167 err = xfrm_lookup(net, &dst, &fl, sk, 0);
168 if (err < 0) {
169 sk->sk_err_soft = -err;
170 goto out;
171 }
172 } else
173 dst_hold(dst);
174
175 if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
176 dccp_sync_mss(sk, dst_mtu(dst));
177 } /* else let the usual retransmit timer handle it */
178 dst_release(dst);
179 goto out;
180 }
181
182 icmpv6_err_convert(type, code, &err);
183
184 /* Might be for an request_sock */
185 switch (sk->sk_state) {
186 struct request_sock *req, **prev;
187 case DCCP_LISTEN:
188 if (sock_owned_by_user(sk))
189 goto out;
190
191 req = inet6_csk_search_req(sk, &prev, dh->dccph_dport,
192 &hdr->daddr, &hdr->saddr,
193 inet6_iif(skb));
194 if (req == NULL)
195 goto out;
196
197 /*
198 * ICMPs are not backlogged, hence we cannot get an established
199 * socket here.
200 */
201 WARN_ON(req->sk != NULL);
202
203 if (seq != dccp_rsk(req)->dreq_iss) {
204 NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
205 goto out;
206 }
207
208 inet_csk_reqsk_queue_drop(sk, req, prev);
209 goto out;
210
211 case DCCP_REQUESTING:
212 case DCCP_RESPOND: /* Cannot happen.
213 It can, it SYNs are crossed. --ANK */
214 if (!sock_owned_by_user(sk)) {
215 DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
216 sk->sk_err = err;
217 /*
218 * Wake people up to see the error
219 * (see connect in sock.c)
220 */
221 sk->sk_error_report(sk);
222 dccp_done(sk);
223 } else
224 sk->sk_err_soft = err;
225 goto out;
226 }
227
228 if (!sock_owned_by_user(sk) && np->recverr) {
229 sk->sk_err = err;
230 sk->sk_error_report(sk);
231 } else
232 sk->sk_err_soft = err;
233
234 out:
235 bh_unlock_sock(sk);
236 sock_put(sk);
237 }
238
239
240 static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
241 struct request_values *rv_unused)
242 {
243 struct inet6_request_sock *ireq6 = inet6_rsk(req);
244 struct ipv6_pinfo *np = inet6_sk(sk);
245 struct sk_buff *skb;
246 struct ipv6_txoptions *opt = NULL;
247 struct in6_addr *final_p = NULL, final;
248 struct flowi fl;
249 int err = -1;
250 struct dst_entry *dst;
251
252 memset(&fl, 0, sizeof(fl));
253 fl.proto = IPPROTO_DCCP;
254 ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
255 ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
256 fl.fl6_flowlabel = 0;
257 fl.oif = ireq6->iif;
258 fl.fl_ip_dport = inet_rsk(req)->rmt_port;
259 fl.fl_ip_sport = inet_rsk(req)->loc_port;
260 security_req_classify_flow(req, &fl);
261
262 opt = np->opt;
263
264 if (opt != NULL && opt->srcrt != NULL) {
265 const struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
266
267 ipv6_addr_copy(&final, &fl.fl6_dst);
268 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
269 final_p = &final;
270 }
271
272 err = ip6_dst_lookup(sk, &dst, &fl);
273 if (err)
274 goto done;
275
276 if (final_p)
277 ipv6_addr_copy(&fl.fl6_dst, final_p);
278
279 err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0);
280 if (err < 0)
281 goto done;
282
283 skb = dccp_make_response(sk, dst, req);
284 if (skb != NULL) {
285 struct dccp_hdr *dh = dccp_hdr(skb);
286
287 dh->dccph_checksum = dccp_v6_csum_finish(skb,
288 &ireq6->loc_addr,
289 &ireq6->rmt_addr);
290 ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
291 err = ip6_xmit(sk, skb, &fl, opt, 0);
292 err = net_xmit_eval(err);
293 }
294
295 done:
296 if (opt != NULL && opt != np->opt)
297 sock_kfree_s(sk, opt, opt->tot_len);
298 dst_release(dst);
299 return err;
300 }
301
302 static void dccp_v6_reqsk_destructor(struct request_sock *req)
303 {
304 dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg);
305 if (inet6_rsk(req)->pktopts != NULL)
306 kfree_skb(inet6_rsk(req)->pktopts);
307 }
308
309 static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
310 {
311 struct ipv6hdr *rxip6h;
312 struct sk_buff *skb;
313 struct flowi fl;
314 struct net *net = dev_net(skb_dst(rxskb)->dev);
315 struct sock *ctl_sk = net->dccp.v6_ctl_sk;
316 struct dst_entry *dst;
317
318 if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET)
319 return;
320
321 if (!ipv6_unicast_destination(rxskb))
322 return;
323
324 skb = dccp_ctl_make_reset(ctl_sk, rxskb);
325 if (skb == NULL)
326 return;
327
328 rxip6h = ipv6_hdr(rxskb);
329 dccp_hdr(skb)->dccph_checksum = dccp_v6_csum_finish(skb, &rxip6h->saddr,
330 &rxip6h->daddr);
331
332 memset(&fl, 0, sizeof(fl));
333 ipv6_addr_copy(&fl.fl6_dst, &rxip6h->saddr);
334 ipv6_addr_copy(&fl.fl6_src, &rxip6h->daddr);
335
336 fl.proto = IPPROTO_DCCP;
337 fl.oif = inet6_iif(rxskb);
338 fl.fl_ip_dport = dccp_hdr(skb)->dccph_dport;
339 fl.fl_ip_sport = dccp_hdr(skb)->dccph_sport;
340 security_skb_classify_flow(rxskb, &fl);
341
342 /* sk = NULL, but it is safe for now. RST socket required. */
343 if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) {
344 if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) {
345 skb_dst_set(skb, dst);
346 ip6_xmit(ctl_sk, skb, &fl, NULL, 0);
347 DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
348 DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
349 return;
350 }
351 }
352
353 kfree_skb(skb);
354 }
355
356 static struct request_sock_ops dccp6_request_sock_ops = {
357 .family = AF_INET6,
358 .obj_size = sizeof(struct dccp6_request_sock),
359 .rtx_syn_ack = dccp_v6_send_response,
360 .send_ack = dccp_reqsk_send_ack,
361 .destructor = dccp_v6_reqsk_destructor,
362 .send_reset = dccp_v6_ctl_send_reset,
363 };
364
365 static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
366 {
367 const struct dccp_hdr *dh = dccp_hdr(skb);
368 const struct ipv6hdr *iph = ipv6_hdr(skb);
369 struct sock *nsk;
370 struct request_sock **prev;
371 /* Find possible connection requests. */
372 struct request_sock *req = inet6_csk_search_req(sk, &prev,
373 dh->dccph_sport,
374 &iph->saddr,
375 &iph->daddr,
376 inet6_iif(skb));
377 if (req != NULL)
378 return dccp_check_req(sk, skb, req, prev);
379
380 nsk = __inet6_lookup_established(sock_net(sk), &dccp_hashinfo,
381 &iph->saddr, dh->dccph_sport,
382 &iph->daddr, ntohs(dh->dccph_dport),
383 inet6_iif(skb));
384 if (nsk != NULL) {
385 if (nsk->sk_state != DCCP_TIME_WAIT) {
386 bh_lock_sock(nsk);
387 return nsk;
388 }
389 inet_twsk_put(inet_twsk(nsk));
390 return NULL;
391 }
392
393 return sk;
394 }
395
396 static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
397 {
398 struct request_sock *req;
399 struct dccp_request_sock *dreq;
400 struct inet6_request_sock *ireq6;
401 struct ipv6_pinfo *np = inet6_sk(sk);
402 const __be32 service = dccp_hdr_request(skb)->dccph_req_service;
403 struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
404
405 if (skb->protocol == htons(ETH_P_IP))
406 return dccp_v4_conn_request(sk, skb);
407
408 if (!ipv6_unicast_destination(skb))
409 return 0; /* discard, don't send a reset here */
410
411 if (dccp_bad_service_code(sk, service)) {
412 dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
413 goto drop;
414 }
415 /*
416 * There are no SYN attacks on IPv6, yet...
417 */
418 dcb->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY;
419 if (inet_csk_reqsk_queue_is_full(sk))
420 goto drop;
421
422 if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
423 goto drop;
424
425 req = inet6_reqsk_alloc(&dccp6_request_sock_ops);
426 if (req == NULL)
427 goto drop;
428
429 if (dccp_reqsk_init(req, dccp_sk(sk), skb))
430 goto drop_and_free;
431
432 dreq = dccp_rsk(req);
433 if (dccp_parse_options(sk, dreq, skb))
434 goto drop_and_free;
435
436 if (security_inet_conn_request(sk, skb, req))
437 goto drop_and_free;
438
439 ireq6 = inet6_rsk(req);
440 ipv6_addr_copy(&ireq6->rmt_addr, &ipv6_hdr(skb)->saddr);
441 ipv6_addr_copy(&ireq6->loc_addr, &ipv6_hdr(skb)->daddr);
442
443 if (ipv6_opt_accepted(sk, skb) ||
444 np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
445 np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
446 atomic_inc(&skb->users);
447 ireq6->pktopts = skb;
448 }
449 ireq6->iif = sk->sk_bound_dev_if;
450
451 /* So that link locals have meaning */
452 if (!sk->sk_bound_dev_if &&
453 ipv6_addr_type(&ireq6->rmt_addr) & IPV6_ADDR_LINKLOCAL)
454 ireq6->iif = inet6_iif(skb);
455
456 /*
457 * Step 3: Process LISTEN state
458 *
459 * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
460 *
461 * In fact we defer setting S.GSR, S.SWL, S.SWH to
462 * dccp_create_openreq_child.
463 */
464 dreq->dreq_isr = dcb->dccpd_seq;
465 dreq->dreq_iss = dccp_v6_init_sequence(skb);
466 dreq->dreq_service = service;
467
468 if (dccp_v6_send_response(sk, req, NULL))
469 goto drop_and_free;
470
471 inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
472 return 0;
473
474 drop_and_free:
475 reqsk_free(req);
476 drop:
477 DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
478 return -1;
479 }
480
481 static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
482 struct sk_buff *skb,
483 struct request_sock *req,
484 struct dst_entry *dst)
485 {
486 struct inet6_request_sock *ireq6 = inet6_rsk(req);
487 struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
488 struct inet_sock *newinet;
489 struct dccp_sock *newdp;
490 struct dccp6_sock *newdp6;
491 struct sock *newsk;
492 struct ipv6_txoptions *opt;
493
494 if (skb->protocol == htons(ETH_P_IP)) {
495 /*
496 * v6 mapped
497 */
498 newsk = dccp_v4_request_recv_sock(sk, skb, req, dst);
499 if (newsk == NULL)
500 return NULL;
501
502 newdp6 = (struct dccp6_sock *)newsk;
503 newdp = dccp_sk(newsk);
504 newinet = inet_sk(newsk);
505 newinet->pinet6 = &newdp6->inet6;
506 newnp = inet6_sk(newsk);
507
508 memcpy(newnp, np, sizeof(struct ipv6_pinfo));
509
510 ipv6_addr_set_v4mapped(newinet->inet_daddr, &newnp->daddr);
511
512 ipv6_addr_set_v4mapped(newinet->inet_saddr, &newnp->saddr);
513
514 ipv6_addr_copy(&newnp->rcv_saddr, &newnp->saddr);
515
516 inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped;
517 newsk->sk_backlog_rcv = dccp_v4_do_rcv;
518 newnp->pktoptions = NULL;
519 newnp->opt = NULL;
520 newnp->mcast_oif = inet6_iif(skb);
521 newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
522
523 /*
524 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
525 * here, dccp_create_openreq_child now does this for us, see the comment in
526 * that function for the gory details. -acme
527 */
528
529 /* It is tricky place. Until this moment IPv4 tcp
530 worked with IPv6 icsk.icsk_af_ops.
531 Sync it now.
532 */
533 dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
534
535 return newsk;
536 }
537
538 opt = np->opt;
539
540 if (sk_acceptq_is_full(sk))
541 goto out_overflow;
542
543 if (dst == NULL) {
544 struct in6_addr *final_p = NULL, final;
545 struct flowi fl;
546
547 memset(&fl, 0, sizeof(fl));
548 fl.proto = IPPROTO_DCCP;
549 ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
550 if (opt != NULL && opt->srcrt != NULL) {
551 const struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
552
553 ipv6_addr_copy(&final, &fl.fl6_dst);
554 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
555 final_p = &final;
556 }
557 ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
558 fl.oif = sk->sk_bound_dev_if;
559 fl.fl_ip_dport = inet_rsk(req)->rmt_port;
560 fl.fl_ip_sport = inet_rsk(req)->loc_port;
561 security_sk_classify_flow(sk, &fl);
562
563 if (ip6_dst_lookup(sk, &dst, &fl))
564 goto out;
565
566 if (final_p)
567 ipv6_addr_copy(&fl.fl6_dst, final_p);
568
569 if ((xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0)
570 goto out;
571 }
572
573 newsk = dccp_create_openreq_child(sk, req, skb);
574 if (newsk == NULL)
575 goto out;
576
577 /*
578 * No need to charge this sock to the relevant IPv6 refcnt debug socks
579 * count here, dccp_create_openreq_child now does this for us, see the
580 * comment in that function for the gory details. -acme
581 */
582
583 __ip6_dst_store(newsk, dst, NULL, NULL);
584 newsk->sk_route_caps = dst->dev->features & ~(NETIF_F_IP_CSUM |
585 NETIF_F_TSO);
586 newdp6 = (struct dccp6_sock *)newsk;
587 newinet = inet_sk(newsk);
588 newinet->pinet6 = &newdp6->inet6;
589 newdp = dccp_sk(newsk);
590 newnp = inet6_sk(newsk);
591
592 memcpy(newnp, np, sizeof(struct ipv6_pinfo));
593
594 ipv6_addr_copy(&newnp->daddr, &ireq6->rmt_addr);
595 ipv6_addr_copy(&newnp->saddr, &ireq6->loc_addr);
596 ipv6_addr_copy(&newnp->rcv_saddr, &ireq6->loc_addr);
597 newsk->sk_bound_dev_if = ireq6->iif;
598
599 /* Now IPv6 options...
600
601 First: no IPv4 options.
602 */
603 newinet->opt = NULL;
604
605 /* Clone RX bits */
606 newnp->rxopt.all = np->rxopt.all;
607
608 /* Clone pktoptions received with SYN */
609 newnp->pktoptions = NULL;
610 if (ireq6->pktopts != NULL) {
611 newnp->pktoptions = skb_clone(ireq6->pktopts, GFP_ATOMIC);
612 kfree_skb(ireq6->pktopts);
613 ireq6->pktopts = NULL;
614 if (newnp->pktoptions)
615 skb_set_owner_r(newnp->pktoptions, newsk);
616 }
617 newnp->opt = NULL;
618 newnp->mcast_oif = inet6_iif(skb);
619 newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
620
621 /*
622 * Clone native IPv6 options from listening socket (if any)
623 *
624 * Yes, keeping reference count would be much more clever, but we make
625 * one more one thing there: reattach optmem to newsk.
626 */
627 if (opt != NULL) {
628 newnp->opt = ipv6_dup_options(newsk, opt);
629 if (opt != np->opt)
630 sock_kfree_s(sk, opt, opt->tot_len);
631 }
632
633 inet_csk(newsk)->icsk_ext_hdr_len = 0;
634 if (newnp->opt != NULL)
635 inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
636 newnp->opt->opt_flen);
637
638 dccp_sync_mss(newsk, dst_mtu(dst));
639
640 newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
641 newinet->inet_rcv_saddr = LOOPBACK4_IPV6;
642
643 __inet6_hash(newsk, NULL);
644 __inet_inherit_port(sk, newsk);
645
646 return newsk;
647
648 out_overflow:
649 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
650 out:
651 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
652 if (opt != NULL && opt != np->opt)
653 sock_kfree_s(sk, opt, opt->tot_len);
654 dst_release(dst);
655 return NULL;
656 }
657
658 /* The socket must have it's spinlock held when we get
659 * here.
660 *
661 * We have a potential double-lock case here, so even when
662 * doing backlog processing we use the BH locking scheme.
663 * This is because we cannot sleep with the original spinlock
664 * held.
665 */
666 static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
667 {
668 struct ipv6_pinfo *np = inet6_sk(sk);
669 struct sk_buff *opt_skb = NULL;
670
671 /* Imagine: socket is IPv6. IPv4 packet arrives,
672 goes to IPv4 receive handler and backlogged.
673 From backlog it always goes here. Kerboom...
674 Fortunately, dccp_rcv_established and rcv_established
675 handle them correctly, but it is not case with
676 dccp_v6_hnd_req and dccp_v6_ctl_send_reset(). --ANK
677 */
678
679 if (skb->protocol == htons(ETH_P_IP))
680 return dccp_v4_do_rcv(sk, skb);
681
682 if (sk_filter(sk, skb))
683 goto discard;
684
685 /*
686 * socket locking is here for SMP purposes as backlog rcv is currently
687 * called with bh processing disabled.
688 */
689
690 /* Do Stevens' IPV6_PKTOPTIONS.
691
692 Yes, guys, it is the only place in our code, where we
693 may make it not affecting IPv4.
694 The rest of code is protocol independent,
695 and I do not like idea to uglify IPv4.
696
697 Actually, all the idea behind IPV6_PKTOPTIONS
698 looks not very well thought. For now we latch
699 options, received in the last packet, enqueued
700 by tcp. Feel free to propose better solution.
701 --ANK (980728)
702 */
703 if (np->rxopt.all)
704 /*
705 * FIXME: Add handling of IPV6_PKTOPTIONS skb. See the comments below
706 * (wrt ipv6_pktopions) and net/ipv6/tcp_ipv6.c for an example.
707 */
708 opt_skb = skb_clone(skb, GFP_ATOMIC);
709
710 if (sk->sk_state == DCCP_OPEN) { /* Fast path */
711 if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))
712 goto reset;
713 if (opt_skb) {
714 /* XXX This is where we would goto ipv6_pktoptions. */
715 __kfree_skb(opt_skb);
716 }
717 return 0;
718 }
719
720 /*
721 * Step 3: Process LISTEN state
722 * If S.state == LISTEN,
723 * If P.type == Request or P contains a valid Init Cookie option,
724 * (* Must scan the packet's options to check for Init
725 * Cookies. Only Init Cookies are processed here,
726 * however; other options are processed in Step 8. This
727 * scan need only be performed if the endpoint uses Init
728 * Cookies *)
729 * (* Generate a new socket and switch to that socket *)
730 * Set S := new socket for this port pair
731 * S.state = RESPOND
732 * Choose S.ISS (initial seqno) or set from Init Cookies
733 * Initialize S.GAR := S.ISS
734 * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies
735 * Continue with S.state == RESPOND
736 * (* A Response packet will be generated in Step 11 *)
737 * Otherwise,
738 * Generate Reset(No Connection) unless P.type == Reset
739 * Drop packet and return
740 *
741 * NOTE: the check for the packet types is done in
742 * dccp_rcv_state_process
743 */
744 if (sk->sk_state == DCCP_LISTEN) {
745 struct sock *nsk = dccp_v6_hnd_req(sk, skb);
746
747 if (nsk == NULL)
748 goto discard;
749 /*
750 * Queue it on the new socket if the new socket is active,
751 * otherwise we just shortcircuit this and continue with
752 * the new socket..
753 */
754 if (nsk != sk) {
755 if (dccp_child_process(sk, nsk, skb))
756 goto reset;
757 if (opt_skb != NULL)
758 __kfree_skb(opt_skb);
759 return 0;
760 }
761 }
762
763 if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len))
764 goto reset;
765 if (opt_skb) {
766 /* XXX This is where we would goto ipv6_pktoptions. */
767 __kfree_skb(opt_skb);
768 }
769 return 0;
770
771 reset:
772 dccp_v6_ctl_send_reset(sk, skb);
773 discard:
774 if (opt_skb != NULL)
775 __kfree_skb(opt_skb);
776 kfree_skb(skb);
777 return 0;
778 }
779
780 static int dccp_v6_rcv(struct sk_buff *skb)
781 {
782 const struct dccp_hdr *dh;
783 struct sock *sk;
784 int min_cov;
785
786 /* Step 1: Check header basics */
787
788 if (dccp_invalid_packet(skb))
789 goto discard_it;
790
791 /* Step 1: If header checksum is incorrect, drop packet and return. */
792 if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr,
793 &ipv6_hdr(skb)->daddr)) {
794 DCCP_WARN("dropped packet with invalid checksum\n");
795 goto discard_it;
796 }
797
798 dh = dccp_hdr(skb);
799
800 DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh);
801 DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
802
803 if (dccp_packet_without_ack(skb))
804 DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ;
805 else
806 DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);
807
808 /* Step 2:
809 * Look up flow ID in table and get corresponding socket */
810 sk = __inet6_lookup_skb(&dccp_hashinfo, skb,
811 dh->dccph_sport, dh->dccph_dport);
812 /*
813 * Step 2:
814 * If no socket ...
815 */
816 if (sk == NULL) {
817 dccp_pr_debug("failed to look up flow ID in table and "
818 "get corresponding socket\n");
819 goto no_dccp_socket;
820 }
821
822 /*
823 * Step 2:
824 * ... or S.state == TIMEWAIT,
825 * Generate Reset(No Connection) unless P.type == Reset
826 * Drop packet and return
827 */
828 if (sk->sk_state == DCCP_TIME_WAIT) {
829 dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: do_time_wait\n");
830 inet_twsk_put(inet_twsk(sk));
831 goto no_dccp_socket;
832 }
833
834 /*
835 * RFC 4340, sec. 9.2.1: Minimum Checksum Coverage
836 * o if MinCsCov = 0, only packets with CsCov = 0 are accepted
837 * o if MinCsCov > 0, also accept packets with CsCov >= MinCsCov
838 */
839 min_cov = dccp_sk(sk)->dccps_pcrlen;
840 if (dh->dccph_cscov && (min_cov == 0 || dh->dccph_cscov < min_cov)) {
841 dccp_pr_debug("Packet CsCov %d does not satisfy MinCsCov %d\n",
842 dh->dccph_cscov, min_cov);
843 /* FIXME: send Data Dropped option (see also dccp_v4_rcv) */
844 goto discard_and_relse;
845 }
846
847 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
848 goto discard_and_relse;
849
850 return sk_receive_skb(sk, skb, 1) ? -1 : 0;
851
852 no_dccp_socket:
853 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
854 goto discard_it;
855 /*
856 * Step 2:
857 * If no socket ...
858 * Generate Reset(No Connection) unless P.type == Reset
859 * Drop packet and return
860 */
861 if (dh->dccph_type != DCCP_PKT_RESET) {
862 DCCP_SKB_CB(skb)->dccpd_reset_code =
863 DCCP_RESET_CODE_NO_CONNECTION;
864 dccp_v6_ctl_send_reset(sk, skb);
865 }
866
867 discard_it:
868 kfree_skb(skb);
869 return 0;
870
871 discard_and_relse:
872 sock_put(sk);
873 goto discard_it;
874 }
875
876 static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
877 int addr_len)
878 {
879 struct sockaddr_in6 *usin = (struct sockaddr_in6 *)uaddr;
880 struct inet_connection_sock *icsk = inet_csk(sk);
881 struct inet_sock *inet = inet_sk(sk);
882 struct ipv6_pinfo *np = inet6_sk(sk);
883 struct dccp_sock *dp = dccp_sk(sk);
884 struct in6_addr *saddr = NULL, *final_p = NULL, final;
885 struct flowi fl;
886 struct dst_entry *dst;
887 int addr_type;
888 int err;
889
890 dp->dccps_role = DCCP_ROLE_CLIENT;
891
892 if (addr_len < SIN6_LEN_RFC2133)
893 return -EINVAL;
894
895 if (usin->sin6_family != AF_INET6)
896 return -EAFNOSUPPORT;
897
898 memset(&fl, 0, sizeof(fl));
899
900 if (np->sndflow) {
901 fl.fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK;
902 IP6_ECN_flow_init(fl.fl6_flowlabel);
903 if (fl.fl6_flowlabel & IPV6_FLOWLABEL_MASK) {
904 struct ip6_flowlabel *flowlabel;
905 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
906 if (flowlabel == NULL)
907 return -EINVAL;
908 ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
909 fl6_sock_release(flowlabel);
910 }
911 }
912 /*
913 * connect() to INADDR_ANY means loopback (BSD'ism).
914 */
915 if (ipv6_addr_any(&usin->sin6_addr))
916 usin->sin6_addr.s6_addr[15] = 1;
917
918 addr_type = ipv6_addr_type(&usin->sin6_addr);
919
920 if (addr_type & IPV6_ADDR_MULTICAST)
921 return -ENETUNREACH;
922
923 if (addr_type & IPV6_ADDR_LINKLOCAL) {
924 if (addr_len >= sizeof(struct sockaddr_in6) &&
925 usin->sin6_scope_id) {
926 /* If interface is set while binding, indices
927 * must coincide.
928 */
929 if (sk->sk_bound_dev_if &&
930 sk->sk_bound_dev_if != usin->sin6_scope_id)
931 return -EINVAL;
932
933 sk->sk_bound_dev_if = usin->sin6_scope_id;
934 }
935
936 /* Connect to link-local address requires an interface */
937 if (!sk->sk_bound_dev_if)
938 return -EINVAL;
939 }
940
941 ipv6_addr_copy(&np->daddr, &usin->sin6_addr);
942 np->flow_label = fl.fl6_flowlabel;
943
944 /*
945 * DCCP over IPv4
946 */
947 if (addr_type == IPV6_ADDR_MAPPED) {
948 u32 exthdrlen = icsk->icsk_ext_hdr_len;
949 struct sockaddr_in sin;
950
951 SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
952
953 if (__ipv6_only_sock(sk))
954 return -ENETUNREACH;
955
956 sin.sin_family = AF_INET;
957 sin.sin_port = usin->sin6_port;
958 sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
959
960 icsk->icsk_af_ops = &dccp_ipv6_mapped;
961 sk->sk_backlog_rcv = dccp_v4_do_rcv;
962
963 err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
964 if (err) {
965 icsk->icsk_ext_hdr_len = exthdrlen;
966 icsk->icsk_af_ops = &dccp_ipv6_af_ops;
967 sk->sk_backlog_rcv = dccp_v6_do_rcv;
968 goto failure;
969 }
970 ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
971 ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, &np->rcv_saddr);
972
973 return err;
974 }
975
976 if (!ipv6_addr_any(&np->rcv_saddr))
977 saddr = &np->rcv_saddr;
978
979 fl.proto = IPPROTO_DCCP;
980 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
981 ipv6_addr_copy(&fl.fl6_src, saddr ? saddr : &np->saddr);
982 fl.oif = sk->sk_bound_dev_if;
983 fl.fl_ip_dport = usin->sin6_port;
984 fl.fl_ip_sport = inet->inet_sport;
985 security_sk_classify_flow(sk, &fl);
986
987 if (np->opt != NULL && np->opt->srcrt != NULL) {
988 const struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
989
990 ipv6_addr_copy(&final, &fl.fl6_dst);
991 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
992 final_p = &final;
993 }
994
995 err = ip6_dst_lookup(sk, &dst, &fl);
996 if (err)
997 goto failure;
998
999 if (final_p)
1000 ipv6_addr_copy(&fl.fl6_dst, final_p);
1001
1002 err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
1003 if (err < 0) {
1004 if (err == -EREMOTE)
1005 err = ip6_dst_blackhole(sk, &dst, &fl);
1006 if (err < 0)
1007 goto failure;
1008 }
1009
1010 if (saddr == NULL) {
1011 saddr = &fl.fl6_src;
1012 ipv6_addr_copy(&np->rcv_saddr, saddr);
1013 }
1014
1015 /* set the source address */
1016 ipv6_addr_copy(&np->saddr, saddr);
1017 inet->inet_rcv_saddr = LOOPBACK4_IPV6;
1018
1019 __ip6_dst_store(sk, dst, NULL, NULL);
1020
1021 icsk->icsk_ext_hdr_len = 0;
1022 if (np->opt != NULL)
1023 icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
1024 np->opt->opt_nflen);
1025
1026 inet->inet_dport = usin->sin6_port;
1027
1028 dccp_set_state(sk, DCCP_REQUESTING);
1029 err = inet6_hash_connect(&dccp_death_row, sk);
1030 if (err)
1031 goto late_failure;
1032
1033 dp->dccps_iss = secure_dccpv6_sequence_number(np->saddr.s6_addr32,
1034 np->daddr.s6_addr32,
1035 inet->inet_sport,
1036 inet->inet_dport);
1037 err = dccp_connect(sk);
1038 if (err)
1039 goto late_failure;
1040
1041 return 0;
1042
1043 late_failure:
1044 dccp_set_state(sk, DCCP_CLOSED);
1045 __sk_dst_reset(sk);
1046 failure:
1047 inet->inet_dport = 0;
1048 sk->sk_route_caps = 0;
1049 return err;
1050 }
1051
1052 static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
1053 .queue_xmit = inet6_csk_xmit,
1054 .send_check = dccp_v6_send_check,
1055 .rebuild_header = inet6_sk_rebuild_header,
1056 .conn_request = dccp_v6_conn_request,
1057 .syn_recv_sock = dccp_v6_request_recv_sock,
1058 .net_header_len = sizeof(struct ipv6hdr),
1059 .setsockopt = ipv6_setsockopt,
1060 .getsockopt = ipv6_getsockopt,
1061 .addr2sockaddr = inet6_csk_addr2sockaddr,
1062 .sockaddr_len = sizeof(struct sockaddr_in6),
1063 .bind_conflict = inet6_csk_bind_conflict,
1064 #ifdef CONFIG_COMPAT
1065 .compat_setsockopt = compat_ipv6_setsockopt,
1066 .compat_getsockopt = compat_ipv6_getsockopt,
1067 #endif
1068 };
1069
1070 /*
1071 * DCCP over IPv4 via INET6 API
1072 */
1073 static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
1074 .queue_xmit = ip_queue_xmit,
1075 .send_check = dccp_v4_send_check,
1076 .rebuild_header = inet_sk_rebuild_header,
1077 .conn_request = dccp_v6_conn_request,
1078 .syn_recv_sock = dccp_v6_request_recv_sock,
1079 .net_header_len = sizeof(struct iphdr),
1080 .setsockopt = ipv6_setsockopt,
1081 .getsockopt = ipv6_getsockopt,
1082 .addr2sockaddr = inet6_csk_addr2sockaddr,
1083 .sockaddr_len = sizeof(struct sockaddr_in6),
1084 #ifdef CONFIG_COMPAT
1085 .compat_setsockopt = compat_ipv6_setsockopt,
1086 .compat_getsockopt = compat_ipv6_getsockopt,
1087 #endif
1088 };
1089
1090 /* NOTE: A lot of things set to zero explicitly by call to
1091 * sk_alloc() so need not be done here.
1092 */
1093 static int dccp_v6_init_sock(struct sock *sk)
1094 {
1095 static __u8 dccp_v6_ctl_sock_initialized;
1096 int err = dccp_init_sock(sk, dccp_v6_ctl_sock_initialized);
1097
1098 if (err == 0) {
1099 if (unlikely(!dccp_v6_ctl_sock_initialized))
1100 dccp_v6_ctl_sock_initialized = 1;
1101 inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
1102 }
1103
1104 return err;
1105 }
1106
1107 static void dccp_v6_destroy_sock(struct sock *sk)
1108 {
1109 dccp_destroy_sock(sk);
1110 inet6_destroy_sock(sk);
1111 }
1112
1113 static struct timewait_sock_ops dccp6_timewait_sock_ops = {
1114 .twsk_obj_size = sizeof(struct dccp6_timewait_sock),
1115 };
1116
1117 static struct proto dccp_v6_prot = {
1118 .name = "DCCPv6",
1119 .owner = THIS_MODULE,
1120 .close = dccp_close,
1121 .connect = dccp_v6_connect,
1122 .disconnect = dccp_disconnect,
1123 .ioctl = dccp_ioctl,
1124 .init = dccp_v6_init_sock,
1125 .setsockopt = dccp_setsockopt,
1126 .getsockopt = dccp_getsockopt,
1127 .sendmsg = dccp_sendmsg,
1128 .recvmsg = dccp_recvmsg,
1129 .backlog_rcv = dccp_v6_do_rcv,
1130 .hash = dccp_v6_hash,
1131 .unhash = inet_unhash,
1132 .accept = inet_csk_accept,
1133 .get_port = inet_csk_get_port,
1134 .shutdown = dccp_shutdown,
1135 .destroy = dccp_v6_destroy_sock,
1136 .orphan_count = &dccp_orphan_count,
1137 .max_header = MAX_DCCP_HEADER,
1138 .obj_size = sizeof(struct dccp6_sock),
1139 .slab_flags = SLAB_DESTROY_BY_RCU,
1140 .rsk_prot = &dccp6_request_sock_ops,
1141 .twsk_prot = &dccp6_timewait_sock_ops,
1142 .h.hashinfo = &dccp_hashinfo,
1143 #ifdef CONFIG_COMPAT
1144 .compat_setsockopt = compat_dccp_setsockopt,
1145 .compat_getsockopt = compat_dccp_getsockopt,
1146 #endif
1147 };
1148
1149 static const struct inet6_protocol dccp_v6_protocol = {
1150 .handler = dccp_v6_rcv,
1151 .err_handler = dccp_v6_err,
1152 .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
1153 };
1154
1155 static const struct proto_ops inet6_dccp_ops = {
1156 .family = PF_INET6,
1157 .owner = THIS_MODULE,
1158 .release = inet6_release,
1159 .bind = inet6_bind,
1160 .connect = inet_stream_connect,
1161 .socketpair = sock_no_socketpair,
1162 .accept = inet_accept,
1163 .getname = inet6_getname,
1164 .poll = dccp_poll,
1165 .ioctl = inet6_ioctl,
1166 .listen = inet_dccp_listen,
1167 .shutdown = inet_shutdown,
1168 .setsockopt = sock_common_setsockopt,
1169 .getsockopt = sock_common_getsockopt,
1170 .sendmsg = inet_sendmsg,
1171 .recvmsg = sock_common_recvmsg,
1172 .mmap = sock_no_mmap,
1173 .sendpage = sock_no_sendpage,
1174 #ifdef CONFIG_COMPAT
1175 .compat_setsockopt = compat_sock_common_setsockopt,
1176 .compat_getsockopt = compat_sock_common_getsockopt,
1177 #endif
1178 };
1179
1180 static struct inet_protosw dccp_v6_protosw = {
1181 .type = SOCK_DCCP,
1182 .protocol = IPPROTO_DCCP,
1183 .prot = &dccp_v6_prot,
1184 .ops = &inet6_dccp_ops,
1185 .flags = INET_PROTOSW_ICSK,
1186 };
1187
1188 static int __net_init dccp_v6_init_net(struct net *net)
1189 {
1190 if (dccp_hashinfo.bhash == NULL)
1191 return -ESOCKTNOSUPPORT;
1192
1193 return inet_ctl_sock_create(&net->dccp.v6_ctl_sk, PF_INET6,
1194 SOCK_DCCP, IPPROTO_DCCP, net);
1195 }
1196
1197 static void __net_exit dccp_v6_exit_net(struct net *net)
1198 {
1199 inet_ctl_sock_destroy(net->dccp.v6_ctl_sk);
1200 }
1201
1202 static struct pernet_operations dccp_v6_ops = {
1203 .init = dccp_v6_init_net,
1204 .exit = dccp_v6_exit_net,
1205 };
1206
1207 static int __init dccp_v6_init(void)
1208 {
1209 int err = proto_register(&dccp_v6_prot, 1);
1210
1211 if (err != 0)
1212 goto out;
1213
1214 err = inet6_add_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
1215 if (err != 0)
1216 goto out_unregister_proto;
1217
1218 inet6_register_protosw(&dccp_v6_protosw);
1219
1220 err = register_pernet_subsys(&dccp_v6_ops);
1221 if (err != 0)
1222 goto out_destroy_ctl_sock;
1223 out:
1224 return err;
1225
1226 out_destroy_ctl_sock:
1227 inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
1228 inet6_unregister_protosw(&dccp_v6_protosw);
1229 out_unregister_proto:
1230 proto_unregister(&dccp_v6_prot);
1231 goto out;
1232 }
1233
1234 static void __exit dccp_v6_exit(void)
1235 {
1236 unregister_pernet_subsys(&dccp_v6_ops);
1237 inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
1238 inet6_unregister_protosw(&dccp_v6_protosw);
1239 proto_unregister(&dccp_v6_prot);
1240 }
1241
1242 module_init(dccp_v6_init);
1243 module_exit(dccp_v6_exit);
1244
1245 /*
1246 * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33)
1247 * values directly, Also cover the case where the protocol is not specified,
1248 * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP
1249 */
1250 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 33, 6);
1251 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 0, 6);
1252 MODULE_LICENSE("GPL");
1253 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
1254 MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol");
Linux ARM platform port for MOXA ART SoC