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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>
51 /* Declare all of our malloc named types */
53 /* Note to Michael/Peter for mac-os,
54 * I think mac has this too since I
55 * do see the M_PCB type, so I
56 * will also put in the mac file the
57 * MALLOC_DECLARE. If this does not
58 * work for mac uncomment the defines for
59 * the strings that we use in Panda, I put
60 * them in comments in the mac-os file.
62 MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
63 MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
64 MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
65 MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
66 MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
67 MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
68 MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
69 MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
70 MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
71 MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
72 MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
73 MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
74 MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
75 MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
76 MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
77 MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
78 MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
79 MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
80 MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
82 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
84 sctp_wakeup_iterator(void)
86 wakeup(&SCTP_BASE_INFO(iterator_running));
90 sctp_iterator_thread(void *v)
92 CURVNET_SET((struct vnet *)v);
93 SCTP_IPI_ITERATOR_WQ_LOCK();
94 SCTP_BASE_INFO(iterator_running) = 0;
96 msleep(&SCTP_BASE_INFO(iterator_running),
97 &SCTP_BASE_INFO(ipi_iterator_wq_mtx),
98 0, "waiting_for_work", 0);
99 if (SCTP_BASE_INFO(threads_must_exit)) {
100 SCTP_IPI_ITERATOR_WQ_DESTROY();
103 sctp_iterator_worker();
109 sctp_startup_iterator(void)
113 ret = kproc_create(sctp_iterator_thread,
115 &SCTP_BASE_INFO(thread_proc),
126 sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
128 struct in6_ifaddr *ifa6;
130 ifa6 = (struct in6_ifaddr *)ifa->ifa;
131 ifa->flags = ifa6->ia6_flags;
132 if (!MODULE_GLOBAL(ip6_use_deprecated)) {
134 IN6_IFF_DEPRECATED) {
135 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
137 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
140 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
146 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
148 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
156 sctp_is_desired_interface_type(struct ifaddr *ifa)
160 /* check the interface type to see if it's one we care about */
161 switch (ifa->ifa_ifp->if_type) {
174 case IFT_ISDNPRIMARY:
185 case IFT_VIRTUALIPADDRESS:
199 sctp_init_ifns_for_vrf(int vrfid)
202 * Here we must apply ANY locks needed by the IFN we access and also
203 * make sure we lock any IFA that exists as we float through the
208 struct in6_ifaddr *ifa6;
209 struct sctp_ifa *sctp_ifa;
213 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
215 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
216 if (ifa->ifa_addr == NULL) {
219 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
220 /* non inet/inet6 skip */
223 if (ifa->ifa_addr->sa_family == AF_INET6) {
224 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
225 /* skip unspecifed addresses */
229 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
233 if (sctp_is_desired_interface_type(ifa) == 0) {
234 /* non desired type */
237 if (ifa->ifa_addr->sa_family == AF_INET6) {
238 ifa6 = (struct in6_ifaddr *)ifa;
239 ifa_flags = ifa6->ia6_flags;
243 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
253 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
262 sctp_init_vrf_list(int vrfid)
264 if (vrfid > SCTP_MAX_VRF_ID)
268 /* Don't care about return here */
269 (void)sctp_allocate_vrf(vrfid);
272 * Now we need to build all the ifn's for this vrf and there
275 sctp_init_ifns_for_vrf(vrfid);
279 sctp_addr_change(struct ifaddr *ifa, int cmd)
281 struct sctp_ifa *ifap = NULL;
282 uint32_t ifa_flags = 0;
285 * BSD only has one VRF, if this changes we will need to hook in the
286 * right things here to get the id to pass to the address managment
289 if (SCTP_BASE_VAR(first_time) == 0) {
290 /* Special test to see if my ::1 will showup with this */
291 SCTP_BASE_VAR(first_time) = 1;
292 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
294 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
295 /* don't know what to do with this */
298 if (ifa->ifa_addr == NULL) {
301 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
302 /* non inet/inet6 skip */
305 if (ifa->ifa_addr->sa_family == AF_INET6) {
306 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
307 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
308 /* skip unspecifed addresses */
312 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
317 if (sctp_is_desired_interface_type(ifa) == 0) {
318 /* non desired type */
321 if (cmd == RTM_ADD) {
322 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
323 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
324 ifa->ifa_ifp->if_xname,
325 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
328 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
329 ifa->ifa_ifp->if_index,
330 ifa->ifa_ifp->if_xname
333 * We don't bump refcount here so when it completes the
334 * final delete will happen.
340 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){
345 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
346 if (!(*pred) (ifn)) {
349 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
350 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE);
357 sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
358 int how, int allonebuf, int type)
360 struct mbuf *m = NULL;
362 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
370 if (SCTP_BUF_IS_EXTENDED(m)) {
371 siz = SCTP_BUF_EXTEND_SIZE(m);
378 if (siz < space_needed) {
383 if (SCTP_BUF_NEXT(m)) {
384 sctp_m_freem(SCTP_BUF_NEXT(m));
385 SCTP_BUF_NEXT(m) = NULL;
387 #ifdef SCTP_MBUF_LOGGING
388 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
389 if (SCTP_BUF_IS_EXTENDED(m)) {
390 sctp_log_mb(m, SCTP_MBUF_IALLOC);
398 #ifdef SCTP_PACKET_LOGGING
400 sctp_packet_log(struct mbuf *m, int length)
406 int grabbed_lock = 0;
407 int value, newval, thisend, thisbegin;
410 * Buffer layout. -sizeof this entry (total_len) -previous end
411 * (value) -ticks of log (ticks) o -ip packet o -as logged -
412 * where this started (thisbegin) x <--end points here
414 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
415 /* Log a packet to the buffer. */
416 if (total_len > SCTP_PACKET_LOG_SIZE) {
417 /* Can't log this packet I have not a buffer big enough */
420 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
423 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
425 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
426 SCTP_IP_PKTLOG_LOCK();
429 value = SCTP_BASE_VAR(packet_log_end);
430 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
431 if (newval >= SCTP_PACKET_LOG_SIZE) {
436 thisbegin = SCTP_BASE_VAR(packet_log_end);
439 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
443 value = SCTP_BASE_VAR(packet_log_end);
444 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
445 if (newval >= SCTP_PACKET_LOG_SIZE) {
450 thisbegin = SCTP_BASE_VAR(packet_log_end);
453 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
458 if (thisend >= SCTP_PACKET_LOG_SIZE) {
459 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
462 SCTP_BASE_VAR(packet_log_writers),
464 SCTP_BASE_VAR(packet_log_end));
465 SCTP_BASE_VAR(packet_log_end) = 0;
469 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
474 tick_tock = (uint32_t *) lenat;
476 *tick_tock = sctp_get_tick_count();
477 copyto = (void *)lenat;
478 thisone = thisend - sizeof(int);
479 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
482 SCTP_IP_PKTLOG_UNLOCK();
485 m_copydata(m, 0, length, (caddr_t)copyto);
488 SCTP_IP_PKTLOG_UNLOCK();
490 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
495 sctp_copy_out_packet_log(uint8_t * target, int length)
498 * We wind through the packet log starting at start copying up to
499 * length bytes out. We return the number of bytes copied.
501 int tocopy, this_copy;
506 if (length < (int)(2 * sizeof(int))) {
507 /* not enough room */
510 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
511 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
513 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
515 * we delay here for just a moment hoping the
516 * writer(s) that were present when we entered will
517 * have left and we only have locking ones that will
518 * contend with us for the lock. This does not
519 * assure 100% access, but its good enough for a
520 * logging facility like this.
527 SCTP_IP_PKTLOG_LOCK();
528 lenat = (int *)target;
529 *lenat = SCTP_BASE_VAR(packet_log_end);
531 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
532 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
533 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
534 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
535 SCTP_PKTLOG_WRITERS_NEED_LOCK);
537 SCTP_IP_PKTLOG_UNLOCK();
538 return (this_copy + sizeof(int));