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31 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_pcb.h>
39 #include <netinet/sctp_header.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp_output.h>
42 #include <netinet/sctp_bsd_addr.h>
43 #include <netinet/sctp_uio.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_timer.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_sysctl.h>
48 #include <netinet/sctp_indata.h>
49 #include <sys/unistd.h>
52 /* Declare all of our malloc named types */
54 /* Note to Michael/Peter for mac-os,
55 * I think mac has this too since I
56 * do see the M_PCB type, so I
57 * will also put in the mac file the
58 * MALLOC_DECLARE. If this does not
59 * work for mac uncomment the defines for
60 * the strings that we use in Panda, I put
61 * them in comments in the mac-os file.
63 MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
64 MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
65 MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
66 MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
67 MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
68 MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
69 MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
70 MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
71 MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
72 MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
73 MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
74 MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
75 MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
76 MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
77 MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
78 MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
79 MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
80 MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
81 MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
84 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
86 sctp_wakeup_iterator(void)
88 wakeup(&sctppcbinfo.iterator_running);
92 sctp_iterator_thread(void *v)
94 SCTP_IPI_ITERATOR_WQ_LOCK();
95 sctppcbinfo.iterator_running = 0;
97 msleep(&sctppcbinfo.iterator_running,
98 &sctppcbinfo.ipi_iterator_wq_mtx,
99 0, "waiting_for_work", 0);
100 sctp_iterator_worker();
105 sctp_startup_iterator(void)
109 ret = kthread_create(sctp_iterator_thread,
111 &sctppcbinfo.thread_proc,
121 sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
123 struct in6_ifaddr *ifa6;
125 ifa6 = (struct in6_ifaddr *)ifa->ifa;
126 ifa->flags = ifa6->ia6_flags;
127 if (!ip6_use_deprecated) {
129 IN6_IFF_DEPRECATED) {
130 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
132 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
135 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
141 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
143 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
150 sctp_is_desired_interface_type(struct ifaddr *ifa)
154 /* check the interface type to see if it's one we care about */
155 switch (ifa->ifa_ifp->if_type) {
168 case IFT_ISDNPRIMARY:
176 case IFT_VIRTUALIPADDRESS:
187 sctp_init_ifns_for_vrf(int vrfid)
190 * Here we must apply ANY locks needed by the IFN we access and also
191 * make sure we lock any IFA that exists as we float through the
196 struct in6_ifaddr *ifa6;
197 struct sctp_ifa *sctp_ifa;
200 TAILQ_FOREACH(ifn, &ifnet, if_list) {
201 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
202 if (ifa->ifa_addr == NULL) {
205 if ((ifa->ifa_addr->sa_family != AF_INET) &&
206 (ifa->ifa_addr->sa_family != AF_INET6)
208 /* non inet/inet6 skip */
211 if (ifa->ifa_addr->sa_family == AF_INET6) {
212 ifa6 = (struct in6_ifaddr *)ifa;
213 ifa_flags = ifa6->ia6_flags;
214 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
215 /* skip unspecifed addresses */
218 } else if (ifa->ifa_addr->sa_family == AF_INET) {
219 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
223 if (sctp_is_desired_interface_type(ifa) == 0) {
224 /* non desired type */
227 if ((ifa->ifa_addr->sa_family == AF_INET6) ||
228 (ifa->ifa_addr->sa_family == AF_INET)) {
229 if (ifa->ifa_addr->sa_family == AF_INET6) {
230 ifa6 = (struct in6_ifaddr *)ifa;
231 ifa_flags = ifa6->ia6_flags;
235 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
245 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
254 sctp_init_vrf_list(int vrfid)
256 if (vrfid > SCTP_MAX_VRF_ID)
260 /* Don't care about return here */
261 (void)sctp_allocate_vrf(vrfid);
264 * Now we need to build all the ifn's for this vrf and there
267 sctp_init_ifns_for_vrf(vrfid);
270 static uint8_t first_time = 0;
274 sctp_addr_change(struct ifaddr *ifa, int cmd)
276 struct sctp_ifa *ifap = NULL;
277 uint32_t ifa_flags = 0;
278 struct in6_ifaddr *ifa6;
281 * BSD only has one VRF, if this changes we will need to hook in the
282 * right things here to get the id to pass to the address managment
285 if (first_time == 0) {
286 /* Special test to see if my ::1 will showup with this */
288 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
290 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
291 /* don't know what to do with this */
294 if (ifa->ifa_addr == NULL) {
297 if ((ifa->ifa_addr->sa_family != AF_INET) &&
298 (ifa->ifa_addr->sa_family != AF_INET6)
300 /* non inet/inet6 skip */
303 if (ifa->ifa_addr->sa_family == AF_INET6) {
304 ifa6 = (struct in6_ifaddr *)ifa;
305 ifa_flags = ifa6->ia6_flags;
306 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
307 /* skip unspecifed addresses */
310 } else if (ifa->ifa_addr->sa_family == AF_INET) {
311 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
315 if (sctp_is_desired_interface_type(ifa) == 0) {
316 /* non desired type */
319 if (cmd == RTM_ADD) {
320 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
321 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
322 ifa->ifa_ifp->if_xname,
323 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
325 } else if (cmd == RTM_DELETE) {
327 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr, ifa->ifa_ifp->if_index);
329 * We don't bump refcount here so when it completes the
330 * final delete will happen.
336 sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
337 int how, int allonebuf, int type)
339 struct mbuf *m = NULL;
341 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
349 if (SCTP_BUF_IS_EXTENDED(m)) {
350 siz = SCTP_BUF_EXTEND_SIZE(m);
357 if (siz < space_needed) {
362 if (SCTP_BUF_NEXT(m)) {
363 sctp_m_freem(SCTP_BUF_NEXT(m));
364 SCTP_BUF_NEXT(m) = NULL;
366 #ifdef SCTP_MBUF_LOGGING
367 if (SCTP_BUF_IS_EXTENDED(m)) {
368 sctp_log_mb(m, SCTP_MBUF_IALLOC);
375 #ifdef SCTP_PACKET_LOGGING
377 int packet_log_start = 0;
378 int packet_log_end = 0;
379 int packet_log_old_end = SCTP_PACKET_LOG_SIZE;
380 int packet_log_wrapped = 0;
381 uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
385 sctp_packet_log(struct mbuf *m, int length)
387 int *lenat, needed, thisone;
390 int total_len, spare;
392 total_len = SCTP_SIZE32((length + (2 * sizeof(int))));
393 /* Log a packet to the buffer. */
394 if (total_len > SCTP_PACKET_LOG_SIZE) {
395 /* Can't log this packet I have not a buffer big enough */
398 if (length < (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
399 printf("Huh, length is %d to small for sctp min:%d\n",
401 (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk)));
404 SCTP_IP_PKTLOG_LOCK();
405 if ((SCTP_PACKET_LOG_SIZE - packet_log_end) <= total_len) {
407 * it won't fit on the end. We must go back to the
408 * beginning. To do this we go back and cahnge
413 lenat = (int *)packet_log_buffer;
414 orig_end = packet_log_end;
415 packet_log_old_end = packet_log_end;
417 if (packet_log_start > packet_log_old_end) {
418 /* calculate the head room */
419 spare = packet_log_start - packet_log_old_end;
423 needed = total_len - spare;
424 packet_log_wrapped = 1;
425 /* Now update the start */
427 thisone = (*(int *)(&packet_log_buffer[packet_log_start]));
432 foo = (int *)(&packet_log_buffer[packet_log_start]);
435 /* move to next one */
436 packet_log_start += thisone;
439 lenat = (int *)&packet_log_buffer[packet_log_end];
440 if (packet_log_start > packet_log_end) {
441 if ((packet_log_end + total_len) > packet_log_start) {
442 /* Now need to update killing some packets */
443 needed = total_len - ((packet_log_start - packet_log_end));
445 thisone = (*(int *)(&packet_log_buffer[packet_log_start]));
450 /* move to next one */
451 packet_log_start += thisone;
452 if (((packet_log_start + sizeof(struct ip)) > SCTP_PACKET_LOG_SIZE) ||
453 (packet_log_wrapped && (packet_log_start >= packet_log_old_end))) {
454 packet_log_start = 0;
455 packet_log_old_end = 0;
456 packet_log_wrapped = 0;
463 if (((packet_log_end + total_len) >= SCTP_PACKET_LOG_SIZE) ||
464 ((void *)((caddr_t)lenat) < (void *)packet_log_buffer) ||
465 ((void *)((caddr_t)lenat + total_len) > (void *)&packet_log_buffer[SCTP_PACKET_LOG_SIZE])) {
466 /* Madness protection */
468 printf("Went mad, end:%d start:%d len:%d wrapped:%d oe:%d - zapping\n",
469 packet_log_end, packet_log_start, total_len, packet_log_wrapped, packet_log_old_end);
470 packet_log_start = packet_log_end = packet_log_old_end = packet_log_wrapped = 0;
471 lenat = (int *)&packet_log_buffer[0];
475 tick_tock = (uint32_t *) lenat;
477 *tick_tock = sctp_get_tick_count();
478 copyto = (void *)lenat;
479 packet_log_end = (((caddr_t)copyto + length) - (caddr_t)packet_log_buffer);
480 SCTP_IP_PKTLOG_UNLOCK();
481 m_copydata(m, 0, length, (caddr_t)copyto);
487 sctp_copy_out_packet_log(uint8_t * target, int length)
490 * We wind through the packet log starting at start copying up to
491 * length bytes out. We return the number of bytes copied.
493 int tocopy, this_copy, copied = 0;
497 if (packet_log_start == packet_log_end) {
501 if (packet_log_wrapped) {
503 * we have a wrapped buffer, we must copy from start to the
504 * old end. Then copy from the top of the buffer to the end.
506 SCTP_IP_PKTLOG_LOCK();
507 at = (void *)&packet_log_buffer[packet_log_start];
508 this_copy = min(tocopy, (packet_log_old_end - packet_log_start));
509 memcpy(target, at, this_copy);
513 SCTP_IP_PKTLOG_UNLOCK();
516 this_copy = min(tocopy, packet_log_end);
517 at = (void *)&packet_log_buffer;
518 memcpy(&target[copied], at, this_copy);
520 SCTP_IP_PKTLOG_UNLOCK();
523 /* we have one contiguous buffer */
524 SCTP_IP_PKTLOG_LOCK();
525 at = (void *)&packet_log_buffer;
526 this_copy = min(length, packet_log_end);
527 memcpy(target, at, this_copy);
528 SCTP_IP_PKTLOG_UNLOCK();