tor-browser

sctp_bsd_addr.c (28078B)

---

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
*    contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <netinet/sctp_os.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp_header.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_bsd_addr.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_indata.h>
#if defined(__FreeBSD__) && !defined(__Userspace__)
#include <sys/unistd.h>
#endif

/* Declare all of our malloc named types */
MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
MALLOC_DEFINE(SCTP_M_MCORE, "sctp_mcore", "sctp mcore queue");

/* Global NON-VNET structure that controls the iterator */
struct iterator_control sctp_it_ctl;
#if !(defined(__FreeBSD__) && !defined(__Userspace__))

static void
sctp_cleanup_itqueue(void)
{
struct sctp_iterator *it, *nit;

TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
	if (it->function_atend != NULL) {
		(*it->function_atend) (it->pointer, it->val);
	}
	TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
	SCTP_FREE(it, SCTP_M_ITER);
}
}
#endif
#if defined(__Userspace__)
/*__Userspace__ TODO if we use thread based iterator
* then the implementation of wakeup will need to change.
* Currently we are using timeo_cond for ident so_timeo
* but that is not sufficient if we need to use another ident
* like wakeup(&sctppcbinfo.iterator_running);
*/
#endif

void
sctp_wakeup_iterator(void)
{
#if defined(SCTP_PROCESS_LEVEL_LOCKS)
#if defined(_WIN32)
WakeAllConditionVariable(&sctp_it_ctl.iterator_wakeup);
#else
pthread_cond_broadcast(&sctp_it_ctl.iterator_wakeup);
#endif
#else
wakeup(&sctp_it_ctl.iterator_running);
#endif
}

#if defined(__Userspace__)
static void *
#else
static void
#endif
sctp_iterator_thread(void *v SCTP_UNUSED)
{
#if defined(__Userspace__)
sctp_userspace_set_threadname("SCTP iterator");
#endif
SCTP_IPI_ITERATOR_WQ_LOCK();
/* In FreeBSD this thread never terminates. */
#if defined(__FreeBSD__) && !defined(__Userspace__)
for (;;) {
#else
while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) == 0) {
#endif
#if !defined(__Userspace__)
	msleep(&sctp_it_ctl.iterator_running,
#if defined(__FreeBSD__)
	       &sctp_it_ctl.ipi_iterator_wq_mtx,
#elif defined(__APPLE__)
	       sctp_it_ctl.ipi_iterator_wq_mtx,
#endif
	       0, "waiting_for_work", 0);
#else
#if defined(_WIN32)
	SleepConditionVariableCS(&sctp_it_ctl.iterator_wakeup, &sctp_it_ctl.ipi_iterator_wq_mtx, INFINITE);
#else
	pthread_cond_wait(&sctp_it_ctl.iterator_wakeup, &sctp_it_ctl.ipi_iterator_wq_mtx);
#endif
#endif
#if !(defined(__FreeBSD__) && !defined(__Userspace__))
	if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) {
		break;
	}
#endif
	sctp_iterator_worker();
}
#if !(defined(__FreeBSD__) && !defined(__Userspace__))
/* Now this thread needs to be terminated */
sctp_cleanup_itqueue();
sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_EXITED;
SCTP_IPI_ITERATOR_WQ_UNLOCK();
#if defined(__Userspace__)
sctp_wakeup_iterator();
return (NULL);
#else
wakeup(&sctp_it_ctl.iterator_flags);
thread_terminate(current_thread());
#ifdef INVARIANTS
panic("Hmm. thread_terminate() continues...");
#endif
#endif
#endif
}

void
sctp_startup_iterator(void)
{
if (sctp_it_ctl.thread_proc) {
	/* You only get one */
	return;
}
/* Initialize global locks here, thus only once. */
SCTP_ITERATOR_LOCK_INIT();
SCTP_IPI_ITERATOR_WQ_INIT();
TAILQ_INIT(&sctp_it_ctl.iteratorhead);
#if defined(__Userspace__)
if (sctp_userspace_thread_create(&sctp_it_ctl.thread_proc, &sctp_iterator_thread)) {
	SCTP_PRINTF("ERROR: Creating sctp_iterator_thread failed.\n");
} else {
	SCTP_BASE_VAR(iterator_thread_started) = 1;
}
#elif defined(__FreeBSD__)
kproc_create(sctp_iterator_thread,
             (void *)NULL,
             &sctp_it_ctl.thread_proc,
             0,
             SCTP_KTHREAD_PAGES,
             SCTP_KTRHEAD_NAME);
#elif defined(__APPLE__)
kernel_thread_start((thread_continue_t)sctp_iterator_thread, NULL, &sctp_it_ctl.thread_proc);
#endif
}

#ifdef INET6

#if defined(__Userspace__)
/* __Userspace__ TODO. struct in6_ifaddr is defined in sys/netinet6/in6_var.h
  ip6_use_deprecated is defined as  int ip6_use_deprecated = 1; in /src/sys/netinet6/in6_proto.c
*/
void
sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
{
   return; /* stub */
}
#else
void
sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
{
struct in6_ifaddr *ifa6;

ifa6 = (struct in6_ifaddr *)ifa->ifa;
ifa->flags = ifa6->ia6_flags;
if (!MODULE_GLOBAL(ip6_use_deprecated)) {
	if (ifa->flags &
	    IN6_IFF_DEPRECATED) {
		ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
	} else {
		ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
	}
} else {
	ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
}
if (ifa->flags &
    (IN6_IFF_DETACHED |
     IN6_IFF_ANYCAST |
     IN6_IFF_NOTREADY)) {
	ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
} else {
	ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
}
}
#endif /* __Userspace__ */
#endif /* INET6 */

#if !defined(__Userspace__)
static uint32_t
sctp_is_desired_interface_type(struct ifnet *ifn)
{
int result;

/* check the interface type to see if it's one we care about */
#if defined(__APPLE__) && !defined(__Userspace__)
switch(ifnet_type(ifn)) {
#else
switch (ifn->if_type) {
#endif
case IFT_ETHER:
case IFT_ISO88023:
case IFT_ISO88024:
case IFT_ISO88025:
case IFT_ISO88026:
case IFT_STARLAN:
case IFT_P10:
case IFT_P80:
case IFT_HY:
case IFT_FDDI:
case IFT_XETHER:
case IFT_ISDNBASIC:
case IFT_ISDNPRIMARY:
case IFT_PTPSERIAL:
case IFT_OTHER:
case IFT_PPP:
case IFT_LOOP:
case IFT_SLIP:
case IFT_GIF:
case IFT_L2VLAN:
case IFT_STF:
#if !(defined(__APPLE__) && !defined(__Userspace__))
case IFT_IP:
case IFT_IPOVERCDLC:
case IFT_IPOVERCLAW:
case IFT_PROPVIRTUAL: /* NetGraph Virtual too */
case IFT_VIRTUALIPADDRESS:
#endif
	result = 1;
	break;
default:
	result = 0;
}

return (result);
}
#endif
#if defined(__APPLE__) && !defined(__Userspace__)

int
sctp_is_vmware_interface(struct ifnet *ifn)
{
return (strncmp(ifnet_name(ifn), "vmnet", 5) == 0);
}

#endif

#if defined(_WIN32) && defined(__Userspace__)
#ifdef MALLOC
#undef MALLOC
#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
#endif
#ifdef FREE
#undef FREE
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
#endif
static void
sctp_init_ifns_for_vrf(int vrfid)
{
#if defined(INET) || defined(INET6)
struct sctp_ifa *sctp_ifa;
DWORD Err, AdapterAddrsSize;
PIP_ADAPTER_ADDRESSES pAdapterAddrs, pAdapt;
PIP_ADAPTER_UNICAST_ADDRESS pUnicast;
#endif

#ifdef INET
AdapterAddrsSize = 0;

if ((Err = GetAdaptersAddresses(AF_INET, 0, NULL, NULL, &AdapterAddrsSize)) != 0) {
	if ((Err != ERROR_BUFFER_OVERFLOW) && (Err != ERROR_INSUFFICIENT_BUFFER)) {
		SCTP_PRINTF("GetAdaptersV4Addresses() sizing failed with error code %d\n", Err);
		SCTP_PRINTF("err = %d; AdapterAddrsSize = %d\n", Err, AdapterAddrsSize);
		return;
	}
}

/* Allocate memory from sizing information */
if ((pAdapterAddrs = (PIP_ADAPTER_ADDRESSES) GlobalAlloc(GPTR, AdapterAddrsSize)) == NULL) {
	SCTP_PRINTF("Memory allocation error!\n");
	return;
}
/* Get actual adapter information */
if ((Err = GetAdaptersAddresses(AF_INET, 0, NULL, pAdapterAddrs, &AdapterAddrsSize)) != ERROR_SUCCESS) {
	SCTP_PRINTF("GetAdaptersV4Addresses() failed with error code %d\n", Err);
	FREE(pAdapterAddrs);
	return;
}
/* Enumerate through each returned adapter and save its information */
for (pAdapt = pAdapterAddrs; pAdapt; pAdapt = pAdapt->Next) {
	if (pAdapt->IfType == IF_TYPE_IEEE80211 || pAdapt->IfType == IF_TYPE_ETHERNET_CSMACD) {
		for (pUnicast = pAdapt->FirstUnicastAddress; pUnicast; pUnicast = pUnicast->Next) {
			if (IN4_ISLINKLOCAL_ADDRESS(&(((struct sockaddr_in *)(pUnicast->Address.lpSockaddr))->sin_addr))) {
				continue;
			}
			sctp_ifa = sctp_add_addr_to_vrf(0,
			                                NULL,
			                                pAdapt->IfIndex,
			                                (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
			                                pAdapt->AdapterName,
			                                NULL,
			                                pUnicast->Address.lpSockaddr,
			                                pAdapt->Flags,
			                                0);
			if (sctp_ifa) {
				sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
			}
		}
	}
}
FREE(pAdapterAddrs);
#endif
#ifdef INET6
AdapterAddrsSize = 0;

if ((Err = GetAdaptersAddresses(AF_INET6, 0, NULL, NULL, &AdapterAddrsSize)) != 0) {
	if ((Err != ERROR_BUFFER_OVERFLOW) && (Err != ERROR_INSUFFICIENT_BUFFER)) {
		SCTP_PRINTF("GetAdaptersV6Addresses() sizing failed with error code %d\n", Err);
		SCTP_PRINTF("err = %d; AdapterAddrsSize = %d\n", Err, AdapterAddrsSize);
		return;
	}
}
/* Allocate memory from sizing information */
if ((pAdapterAddrs = (PIP_ADAPTER_ADDRESSES) GlobalAlloc(GPTR, AdapterAddrsSize)) == NULL) {
	SCTP_PRINTF("Memory allocation error!\n");
	return;
}
/* Get actual adapter information */
if ((Err = GetAdaptersAddresses(AF_INET6, 0, NULL, pAdapterAddrs, &AdapterAddrsSize)) != ERROR_SUCCESS) {
	SCTP_PRINTF("GetAdaptersV6Addresses() failed with error code %d\n", Err);
	FREE(pAdapterAddrs);
	return;
}
/* Enumerate through each returned adapter and save its information */
for (pAdapt = pAdapterAddrs; pAdapt; pAdapt = pAdapt->Next) {
	if (pAdapt->IfType == IF_TYPE_IEEE80211 || pAdapt->IfType == IF_TYPE_ETHERNET_CSMACD) {
		for (pUnicast = pAdapt->FirstUnicastAddress; pUnicast; pUnicast = pUnicast->Next) {
			sctp_ifa = sctp_add_addr_to_vrf(0,
			                                NULL,
			                                pAdapt->Ipv6IfIndex,
			                                (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
			                                pAdapt->AdapterName,
			                                NULL,
			                                pUnicast->Address.lpSockaddr,
			                                pAdapt->Flags,
			                                0);
			if (sctp_ifa) {
				sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
			}
		}
	}
}
FREE(pAdapterAddrs);
#endif
}
#elif defined(__Userspace__)
static void
sctp_init_ifns_for_vrf(int vrfid)
{
#if defined(INET) || defined(INET6)
int rc;
struct ifaddrs *ifa, *ifas;
struct sctp_ifa *sctp_ifa;
uint32_t ifa_flags;

rc = getifaddrs(&ifas);
if (rc != 0) {
	return;
}
for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
	if (ifa->ifa_addr == NULL) {
		continue;
	}
#if !defined(INET)
	if (ifa->ifa_addr->sa_family != AF_INET6) {
		/* non inet6 skip */
		continue;
	}
#elif !defined(INET6)
	if (ifa->ifa_addr->sa_family != AF_INET) {
		/* non inet skip */
		continue;
	}
#else
	if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
		/* non inet/inet6 skip */
		continue;
	}
#endif
#if defined(INET6)
	if ((ifa->ifa_addr->sa_family == AF_INET6) &&
	    IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
		/* skip unspecified addresses */
		continue;
	}
#endif
#if defined(INET)
	if (ifa->ifa_addr->sa_family == AF_INET &&
	    ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
		continue;
	}
#endif
	ifa_flags = 0;
	sctp_ifa = sctp_add_addr_to_vrf(vrfid,
	                                NULL,
	                                if_nametoindex(ifa->ifa_name),
	                                0,
	                                ifa->ifa_name,
	                                NULL,
	                                ifa->ifa_addr,
	                                ifa_flags,
	                                0);
	if (sctp_ifa) {
		sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
	}
}
freeifaddrs(ifas);
#endif
}
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
static void
sctp_init_ifns_for_vrf(int vrfid)
{
/* Here we must apply ANY locks needed by the
 * IFN we access and also make sure we lock
 * any IFA that exists as we float through the
 * list of IFA's
 */
struct ifnet **ifnetlist;
uint32_t i, j, count;
char name[SCTP_IFNAMSIZ];
struct ifnet *ifn;
struct ifaddr **ifaddrlist;
struct ifaddr *ifa;
struct in6_ifaddr *ifa6;
struct sctp_ifa *sctp_ifa;
uint32_t ifa_flags;

if (ifnet_list_get(IFNET_FAMILY_ANY, &ifnetlist, &count) != 0) {
	return;
}
for (i = 0; i < count; i++) {
	ifn = ifnetlist[i];
	if (SCTP_BASE_SYSCTL(sctp_ignore_vmware_interfaces) && sctp_is_vmware_interface(ifn)) {
		continue;
	}
	if (sctp_is_desired_interface_type(ifn) == 0) {
		/* non desired type */
		continue;
	}
	if (ifnet_get_address_list(ifn, &ifaddrlist) != 0) {
		continue;
	}
	for (j = 0; ifaddrlist[j] != NULL; j++) {
		ifa = ifaddrlist[j];
		if (ifa->ifa_addr == NULL) {
			continue;
		}
		if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
			/* non inet/inet6 skip */
			continue;
		}
		if (ifa->ifa_addr->sa_family == AF_INET6) {
			if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
				/* skip unspecified addresses */
				continue;
			}
		} else {
			if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == INADDR_ANY) {
				continue;
			}
		}
		if (ifa->ifa_addr->sa_family == AF_INET6) {
			ifa6 = (struct in6_ifaddr *)ifa;
			ifa_flags = ifa6->ia6_flags;
		} else {
			ifa_flags = 0;
		}
		SCTP_SNPRINTF(name, SCTP_IFNAMSIZ, "%s%d", ifnet_name(ifn), ifnet_unit(ifn));
		sctp_ifa = sctp_add_addr_to_vrf(vrfid,
		                                (void *)ifn, /* XXX */
		                                ifnet_index(ifn),
		                                ifnet_type(ifn),
		                                name,
		                                (void *)ifa, /* XXX */
		                                ifa->ifa_addr,
		                                ifa_flags,
		                                0);
		if (sctp_ifa) {
			sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
		}
	}
	ifnet_free_address_list(ifaddrlist);
}
ifnet_list_free(ifnetlist);
}
#endif
#if defined(__FreeBSD__) && !defined(__Userspace__)
static void
sctp_init_ifns_for_vrf(int vrfid)
{
/* Here we must apply ANY locks needed by the
 * IFN we access and also make sure we lock
 * any IFA that exists as we float through the
 * list of IFA's
 */
struct epoch_tracker et;
struct ifnet *ifn;
struct ifaddr *ifa;
struct sctp_ifa *sctp_ifa;
uint32_t ifa_flags;
#ifdef INET6
struct in6_ifaddr *ifa6;
#endif

IFNET_RLOCK();
NET_EPOCH_ENTER(et);
CK_STAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_link) {
	if (sctp_is_desired_interface_type(ifn) == 0) {
		/* non desired type */
		continue;
	}
	CK_STAILQ_FOREACH(ifa, &ifn->if_addrhead, ifa_link) {
		if (ifa->ifa_addr == NULL) {
			continue;
		}
		switch (ifa->ifa_addr->sa_family) {
#ifdef INET
		case AF_INET:
			if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
				continue;
			}
			break;
#endif
#ifdef INET6
		case AF_INET6:
			if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
				/* skip unspecified addresses */
				continue;
			}
			break;
#endif
		default:
			continue;
		}
		switch (ifa->ifa_addr->sa_family) {
#ifdef INET
		case AF_INET:
			ifa_flags = 0;
			break;
#endif
#ifdef INET6
		case AF_INET6:
			ifa6 = (struct in6_ifaddr *)ifa;
			ifa_flags = ifa6->ia6_flags;
			break;
#endif
		default:
			ifa_flags = 0;
			break;
		}
		sctp_ifa = sctp_add_addr_to_vrf(vrfid,
		                                (void *)ifn,
		                                ifn->if_index,
		                                ifn->if_type,
		                                ifn->if_xname,
		                                (void *)ifa,
		                                ifa->ifa_addr,
		                                ifa_flags,
		                                0);
		if (sctp_ifa) {
			sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
		}
	}
}
NET_EPOCH_EXIT(et);
IFNET_RUNLOCK();
}
#endif

void
sctp_init_vrf_list(int vrfid)
{
if (vrfid > SCTP_MAX_VRF_ID)
	/* can't do that */
	return;

/* Don't care about return here */
(void)sctp_allocate_vrf(vrfid);

/* Now we need to build all the ifn's
 * for this vrf and there addresses
 */
sctp_init_ifns_for_vrf(vrfid);
}

void
sctp_addr_change(struct ifaddr *ifa, int cmd)
{
#if defined(__Userspace__)
       return;
#else
uint32_t ifa_flags = 0;

if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
	return;
}
/* BSD only has one VRF, if this changes
 * we will need to hook in the right
 * things here to get the id to pass to
 * the address management routine.
 */
if (SCTP_BASE_VAR(first_time) == 0) {
	/* Special test to see if my ::1 will showup with this */
	SCTP_BASE_VAR(first_time) = 1;
	sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
}

if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
	/* don't know what to do with this */
	return;
}

if (ifa->ifa_addr == NULL) {
	return;
}
if (sctp_is_desired_interface_type(ifa->ifa_ifp) == 0) {
	/* non desired type */
	return;
}
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
	if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
		return;
	}
	break;
#endif
#ifdef INET6
case AF_INET6:
	ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
	if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
		/* skip unspecified addresses */
		return;
	}
	break;
#endif
default:
	/* non inet/inet6 skip */
	return;
}
if (cmd == RTM_ADD) {
	(void)sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
#if defined(__APPLE__) && !defined(__Userspace__)
	                           ifnet_index(ifa->ifa_ifp), ifnet_type(ifa->ifa_ifp), ifnet_name(ifa->ifa_ifp),
#else
	                           ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, ifa->ifa_ifp->if_xname,
#endif
	                           (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
} else {
	sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
#if defined(__APPLE__) && !defined(__Userspace__)
	                       ifnet_index(ifa->ifa_ifp),
	                       ifnet_name(ifa->ifa_ifp));
#else
	                       ifa->ifa_ifp->if_index,
	                       ifa->ifa_ifp->if_xname);
#endif

	/* We don't bump refcount here so when it completes
	 * the final delete will happen.
	 */
}
#endif
}

#if defined(__FreeBSD__) && !defined(__Userspace__)
void
sctp_addr_change_event_handler(void *arg __unused, struct ifaddr *ifa, int cmd) {
sctp_addr_change(ifa, cmd);
}
#endif
#if defined(__APPLE__) && !defined(__Userspace__)
void
sctp_add_or_del_interfaces(int (*pred)(struct ifnet *), int add)
{
struct ifnet **ifnetlist;
struct ifaddr **ifaddrlist;
uint32_t i, j, count;

if (ifnet_list_get(IFNET_FAMILY_ANY, &ifnetlist, &count) != 0) {
	return;
}
for (i = 0; i < count; i++) {
	if (!(*pred)(ifnetlist[i])) {
		continue;
	}
	if (ifnet_get_address_list(ifnetlist[i], &ifaddrlist) != 0) {
		continue;
	}
	for (j = 0; ifaddrlist[j] != NULL; j++) {
		sctp_addr_change(ifaddrlist[j], add ? RTM_ADD : RTM_DELETE);
	}
	ifnet_free_address_list(ifaddrlist);
}
ifnet_list_free(ifnetlist);
return;
}
#endif

struct mbuf *
sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
	      int how, int allonebuf, int type)
{
struct mbuf *m = NULL;
#if defined(__FreeBSD__) || defined(__Userspace__)
#if defined(__Userspace__)
m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0, allonebuf);
#else
m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
#endif
if (m == NULL) {
	/* bad, no memory */
	return (m);
}
#if !defined(__Userspace__)
if (allonebuf) {
	if (SCTP_BUF_SIZE(m) < space_needed) {
		m_freem(m);
		return (NULL);
	}
	KASSERT(SCTP_BUF_NEXT(m) == NULL, ("%s: no chain allowed", __func__));
}
#endif
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
	sctp_log_mb(m, SCTP_MBUF_IALLOC);
}
#endif
#else
int mbuf_threshold;
unsigned int size;

if (want_header) {
	MGETHDR(m, how, type);
	size = MHLEN;
} else {
	MGET(m, how, type);
	size = MLEN;
}
if (m == NULL) {
	return (NULL);
}
if (allonebuf == 0) {
	mbuf_threshold = SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count);
} else {
	mbuf_threshold = 1;
}

if (space_needed > (unsigned int)(((mbuf_threshold - 1) * MLEN) + MHLEN)) {
	MCLGET(m, how);
	if (m == NULL) {
		return (NULL);
	}
	if (SCTP_BUF_IS_EXTENDED(m) == 0) {
		sctp_m_freem(m);
		return (NULL);
	}
	size = SCTP_BUF_EXTEND_SIZE(m);
}
if (allonebuf != 0 && size < space_needed) {
	m_freem(m);
	return (NULL);
}
SCTP_BUF_LEN(m) = 0;
SCTP_BUF_NEXT(m) = SCTP_BUF_NEXT_PKT(m) = NULL;
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
	sctp_log_mb(m, SCTP_MBUF_IALLOC);
}
#endif
#endif
return (m);
}

#ifdef SCTP_PACKET_LOGGING
void
sctp_packet_log(struct mbuf *m)
{
int *lenat, thisone;
void *copyto;
uint32_t *tick_tock;
int length;
int total_len;
int grabbed_lock = 0;
int value, newval, thisend, thisbegin;
/*
 * Buffer layout.
 * -sizeof this entry (total_len)
 * -previous end      (value)
 * -ticks of log      (ticks)
 * o -ip packet
 * o -as logged
 * - where this started (thisbegin)
 * x <--end points here
 */
length = SCTP_HEADER_LEN(m);
total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
/* Log a packet to the buffer. */
if (total_len> SCTP_PACKET_LOG_SIZE) {
	/* Can't log this packet I have not a buffer big enough */
	return;
}
if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
	return;
}
atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
try_again:
if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
	SCTP_IP_PKTLOG_LOCK();
	grabbed_lock = 1;
again_locked:
	value = SCTP_BASE_VAR(packet_log_end);
	newval = SCTP_BASE_VAR(packet_log_end) + total_len;
	if (newval >= SCTP_PACKET_LOG_SIZE) {
		/* we wrapped */
		thisbegin = 0;
		thisend = total_len;
	} else {
		thisbegin = SCTP_BASE_VAR(packet_log_end);
		thisend = newval;
	}
	if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
		goto again_locked;
	}
} else {
	value = SCTP_BASE_VAR(packet_log_end);
	newval = SCTP_BASE_VAR(packet_log_end) + total_len;
	if (newval >= SCTP_PACKET_LOG_SIZE) {
		/* we wrapped */
		thisbegin = 0;
		thisend = total_len;
	} else {
		thisbegin = SCTP_BASE_VAR(packet_log_end);
		thisend = newval;
	}
	if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
		goto try_again;
	}
}
/* Sanity check */
if (thisend >= SCTP_PACKET_LOG_SIZE) {
	SCTP_PRINTF("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
	            thisbegin,
	            thisend,
	            SCTP_BASE_VAR(packet_log_writers),
	            grabbed_lock,
	            SCTP_BASE_VAR(packet_log_end));
	SCTP_BASE_VAR(packet_log_end) = 0;
	goto no_log;
}
lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
*lenat = total_len;
lenat++;
*lenat = value;
lenat++;
tick_tock = (uint32_t *)lenat;
lenat++;
*tick_tock = sctp_get_tick_count();
copyto = (void *)lenat;
thisone = thisend - sizeof(int);
lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
*lenat = thisbegin;
if (grabbed_lock) {
	SCTP_IP_PKTLOG_UNLOCK();
	grabbed_lock = 0;
}
m_copydata(m, 0, length, (caddr_t)copyto);
no_log:
if (grabbed_lock) {
	SCTP_IP_PKTLOG_UNLOCK();
}
atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
}

int
sctp_copy_out_packet_log(uint8_t *target, int length)
{
/* We wind through the packet log starting at
 * start copying up to length bytes out.
 * We return the number of bytes copied.
 */
int this_copy;
int *lenat;
int did_delay = 0;

if (length < (int)(2 * sizeof(int))) {
	/* not enough room */
	return (0);
}
if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
	atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
again:
	if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
		/* we delay here for just a moment hoping the writer(s) that were
		 * present when we entered will have left and we only have
		 * locking ones that will contend with us for the lock. This
		 * does not assure 100% access, but its good enough for
		 * a logging facility like this.
		 */
		did_delay = 1;
		DELAY(10);
		goto again;
	}
}
SCTP_IP_PKTLOG_LOCK();
lenat = (int *)target;
*lenat = SCTP_BASE_VAR(packet_log_end);
lenat++;
this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
	atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
	                    SCTP_PKTLOG_WRITERS_NEED_LOCK);
}
SCTP_IP_PKTLOG_UNLOCK();
return (this_copy + sizeof(int));
}

#endif