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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 = kproc_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;
151 sctp_is_desired_interface_type(struct ifaddr *ifa)
155 /* check the interface type to see if it's one we care about */
156 switch (ifa->ifa_ifp->if_type) {
169 case IFT_ISDNPRIMARY:
178 case IFT_VIRTUALIPADDRESS:
189 sctp_init_ifns_for_vrf(int vrfid)
192 * Here we must apply ANY locks needed by the IFN we access and also
193 * make sure we lock any IFA that exists as we float through the
198 struct in6_ifaddr *ifa6;
199 struct sctp_ifa *sctp_ifa;
202 TAILQ_FOREACH(ifn, &ifnet, if_list) {
203 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
204 if (ifa->ifa_addr == NULL) {
207 if ((ifa->ifa_addr->sa_family != AF_INET) &&
208 (ifa->ifa_addr->sa_family != AF_INET6)
210 /* non inet/inet6 skip */
213 if (ifa->ifa_addr->sa_family == AF_INET6) {
214 ifa6 = (struct in6_ifaddr *)ifa;
215 ifa_flags = ifa6->ia6_flags;
216 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
217 /* skip unspecifed addresses */
220 } else if (ifa->ifa_addr->sa_family == AF_INET) {
221 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
225 if (sctp_is_desired_interface_type(ifa) == 0) {
226 /* non desired type */
229 if ((ifa->ifa_addr->sa_family == AF_INET6) ||
230 (ifa->ifa_addr->sa_family == AF_INET)) {
231 if (ifa->ifa_addr->sa_family == AF_INET6) {
232 ifa6 = (struct in6_ifaddr *)ifa;
233 ifa_flags = ifa6->ia6_flags;
237 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
247 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
256 sctp_init_vrf_list(int vrfid)
258 if (vrfid > SCTP_MAX_VRF_ID)
262 /* Don't care about return here */
263 (void)sctp_allocate_vrf(vrfid);
266 * Now we need to build all the ifn's for this vrf and there
269 sctp_init_ifns_for_vrf(vrfid);
272 static uint8_t first_time = 0;
276 sctp_addr_change(struct ifaddr *ifa, int cmd)
278 struct sctp_ifa *ifap = NULL;
279 uint32_t ifa_flags = 0;
280 struct in6_ifaddr *ifa6;
283 * BSD only has one VRF, if this changes we will need to hook in the
284 * right things here to get the id to pass to the address managment
287 if (first_time == 0) {
288 /* Special test to see if my ::1 will showup with this */
290 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
292 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
293 /* don't know what to do with this */
296 if (ifa->ifa_addr == NULL) {
299 if ((ifa->ifa_addr->sa_family != AF_INET) &&
300 (ifa->ifa_addr->sa_family != AF_INET6)
302 /* non inet/inet6 skip */
305 if (ifa->ifa_addr->sa_family == AF_INET6) {
306 ifa6 = (struct in6_ifaddr *)ifa;
307 ifa_flags = ifa6->ia6_flags;
308 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
309 /* skip unspecifed addresses */
312 } else if (ifa->ifa_addr->sa_family == AF_INET) {
313 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);
326 } else if (cmd == RTM_DELETE) {
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_get_mbuf_for_msg(unsigned int space_needed, int want_header,
341 int how, int allonebuf, int type)
343 struct mbuf *m = NULL;
345 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
353 if (SCTP_BUF_IS_EXTENDED(m)) {
354 siz = SCTP_BUF_EXTEND_SIZE(m);
361 if (siz < space_needed) {
366 if (SCTP_BUF_NEXT(m)) {
367 sctp_m_freem(SCTP_BUF_NEXT(m));
368 SCTP_BUF_NEXT(m) = NULL;
370 #ifdef SCTP_MBUF_LOGGING
371 if (sctp_logging_level & SCTP_MBUF_LOGGING_ENABLE) {
372 if (SCTP_BUF_IS_EXTENDED(m)) {
373 sctp_log_mb(m, SCTP_MBUF_IALLOC);
381 #ifdef SCTP_PACKET_LOGGING
383 int packet_log_writers = 0;
384 int packet_log_end = 0;
385 uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
389 sctp_packet_log(struct mbuf *m, int length)
395 int grabbed_lock = 0;
396 int value, newval, thisend, thisbegin;
399 * Buffer layout. -sizeof this entry (total_len) -previous end
400 * (value) -ticks of log (ticks) o -ip packet o -as logged -
401 * where this started (thisbegin) x <--end points here
403 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
404 /* Log a packet to the buffer. */
405 if (total_len > SCTP_PACKET_LOG_SIZE) {
406 /* Can't log this packet I have not a buffer big enough */
409 if (length < (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
412 atomic_add_int(&packet_log_writers, 1);
414 if (packet_log_writers > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
415 SCTP_IP_PKTLOG_LOCK();
418 value = packet_log_end;
419 newval = packet_log_end + total_len;
420 if (newval >= SCTP_PACKET_LOG_SIZE) {
425 thisbegin = packet_log_end;
428 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
432 value = packet_log_end;
433 newval = packet_log_end + total_len;
434 if (newval >= SCTP_PACKET_LOG_SIZE) {
439 thisbegin = packet_log_end;
442 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
447 if (thisend >= SCTP_PACKET_LOG_SIZE) {
448 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
458 lenat = (int *)&packet_log_buffer[thisbegin];
463 tick_tock = (uint32_t *) lenat;
465 *tick_tock = sctp_get_tick_count();
466 copyto = (void *)lenat;
467 thisone = thisend - sizeof(int);
468 lenat = (int *)&packet_log_buffer[thisone];
471 SCTP_IP_PKTLOG_UNLOCK();
474 m_copydata(m, 0, length, (caddr_t)copyto);
477 SCTP_IP_PKTLOG_UNLOCK();
479 atomic_subtract_int(&packet_log_writers, 1);
484 sctp_copy_out_packet_log(uint8_t * target, int length)
487 * We wind through the packet log starting at start copying up to
488 * length bytes out. We return the number of bytes copied.
490 int tocopy, this_copy;
495 if (length < (2 * sizeof(int))) {
496 /* not enough room */
499 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
500 atomic_add_int(&packet_log_writers, SCTP_PKTLOG_WRITERS_NEED_LOCK);
502 if ((did_delay == 0) && (packet_log_writers != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
504 * we delay here for just a moment hoping the
505 * writer(s) that were present when we entered will
506 * have left and we only have locking ones that will
507 * contend with us for the lock. This does not
508 * assure 100% access, but its good enough for a
509 * logging facility like this.
516 SCTP_IP_PKTLOG_LOCK();
517 lenat = (int *)target;
518 *lenat = packet_log_end;
520 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
521 memcpy((void *)lenat, (void *)packet_log_buffer, this_copy);
522 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
523 atomic_subtract_int(&packet_log_writers,
524 SCTP_PKTLOG_WRITERS_NEED_LOCK);
526 SCTP_IP_PKTLOG_UNLOCK();
527 return (this_copy + sizeof(int));