The Tor Browser: netwerk/sctp/src/netinet/sctp_bsd

netwerk/sctp/src/netinet/sctp_bsd_addr.c@4ab42b5ab56c (annotated)

netwerk/sctp/src/netinet/sctp_bsd_addr.c

Wed, 31 Dec 2014 07:53:36 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:53:36 +0100
branch: TOR_BUG_3246
changeset 5: 4ab42b5ab56c
permissions: -rwxr-xr-x

Correct small whitespace inconsistency, lost while renaming variables.

 /*-
  * 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.
  */
 #ifdef __FreeBSD__
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 258765 2013-11-30 12:51:19Z tuexen $");
 #endif
 #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(ANDROID)
 #include <unistd.h>
 #include <ifaddrs-android-ext.h>
 #else
 #if defined(__FreeBSD__)
 #include <sys/unistd.h>
 #endif
 #endif
 /* Declare all of our malloc named types */
 #ifndef __Panda__
 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");
 #endif
 /* Global NON-VNET structure that controls the iterator */
 struct iterator_control sctp_it_ctl;
 #if !defined(__FreeBSD__)
 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(__Userspace_os_Windows)
 	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)
 {
 	SCTP_IPI_ITERATOR_WQ_LOCK();
 	/* In FreeBSD this thread never terminates. */
 #if defined(__FreeBSD__)
 	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__) || defined(__Userspace_os_Darwin)
 		       sctp_it_ctl.ipi_iterator_wq_mtx,
 #endif
 , "waiting_for_work", 0);
 #else
 #if defined(__Userspace_os_Windows)
 		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__)
 		if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) {
 			break;
 		}
 #endif
 		sctp_iterator_worker();
 	}
 #if !defined(__FreeBSD__)
 	/* 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(__FreeBSD__)
 #if __FreeBSD_version <= 701000
 	kthread_create(sctp_iterator_thread,
 #else
 	kproc_create(sctp_iterator_thread,
 #endif
 	             (void *)NULL,
 	             &sctp_it_ctl.thread_proc,
 	             RFPROC,
 	             SCTP_KTHREAD_PAGES,
 	             SCTP_KTRHEAD_NAME);
 #elif defined(__APPLE__)
 	kernel_thread_start((thread_continue_t)sctp_iterator_thread, NULL, &sctp_it_ctl.thread_proc);
 #elif defined(__Userspace__)
 #if defined(__Userspace_os_Windows)
 	if ((sctp_it_ctl.thread_proc = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)&sctp_iterator_thread, NULL, 0, NULL)) == NULL) {
 #else
 	if (pthread_create(&sctp_it_ctl.thread_proc, NULL, &sctp_iterator_thread, NULL)) {
 #endif
 		SCTP_PRINTF("ERROR: Creating sctp_iterator_thread failed.\n");
 	}
 #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__)
 	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__)
 	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__)
 int
 sctp_is_vmware_interface(struct ifnet *ifn)
 {
 	return (strncmp(ifnet_name(ifn), "vmnet", 5) == 0);
 }
 #endif
 #if defined(__Userspace_os_Windows)
 #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 ifaddrs *ifa;
 	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);
 		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;
 				}
 				ifa = (struct ifaddrs*)malloc(sizeof(struct ifaddrs));
 				ifa->ifa_name = strdup(pAdapt->AdapterName);
 				ifa->ifa_flags = pAdapt->Flags;
 				ifa->ifa_addr = (struct sockaddr *)malloc(sizeof(struct sockaddr_in));
 				memcpy(ifa->ifa_addr, pUnicast->Address.lpSockaddr, sizeof(struct sockaddr_in));
 				sctp_ifa = sctp_add_addr_to_vrf(0,
 				                                ifa,
 				                                pAdapt->IfIndex,
 				                                (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
 				                                ifa->ifa_name,
 				                                (void *)ifa,
 				                                ifa->ifa_addr,
 				                                ifa->ifa_flags,
 );
 				if (sctp_ifa) {
 					sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 				}
 			}
 		}
 	}
 	if (pAdapterAddrs)
 		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);
 		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) {
 				ifa = (struct ifaddrs*)malloc(sizeof(struct ifaddrs));
 				ifa->ifa_name = strdup(pAdapt->AdapterName);
 				ifa->ifa_flags = pAdapt->Flags;
 				ifa->ifa_addr = (struct sockaddr *)malloc(sizeof(struct sockaddr_in6));
 				memcpy(ifa->ifa_addr, pUnicast->Address.lpSockaddr, sizeof(struct sockaddr_in6));
 				sctp_ifa = sctp_add_addr_to_vrf(0,
 				                                ifa,
 				                                pAdapt->Ipv6IfIndex,
 				                                (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
 				                                ifa->ifa_name,
 				                                (void *)ifa,
 				                                ifa->ifa_addr,
 				                                ifa->ifa_flags,
 );
 				if (sctp_ifa) {
 					sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 				}
 			}
 		}
 	}
 	if (pAdapterAddrs)
 		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 = NULL;
 	struct sctp_ifa *sctp_ifa;
 	uint32_t ifa_flags;
 	rc = getifaddrs(&g_interfaces);
 	if (rc != 0) {
 		return;
 	}
 	for (ifa = g_interfaces; 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 unspecifed 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,
 		                                ifa,
 		                                if_nametoindex(ifa->ifa_name),
 ,
 		                                ifa->ifa_name,
 		                                (void *)ifa,
 		                                ifa->ifa_addr,
 		                                ifa_flags,
 );
 		if (sctp_ifa) {
 			sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 		}
 	}
 #endif
 }
 #endif
 #if defined(__APPLE__)
 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 unspecifed 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;
 			}
 			snprintf(name, SCTP_IFNAMSIZ, "%s%d", ifnet_name(ifn), ifnet_unit(ifn));
 			sctp_ifa = sctp_add_addr_to_vrf(vrfid,
 			                                (void *)ifn,
 			                                ifnet_index(ifn),
 			                                ifnet_type(ifn),
 			                                name,
 			                                (void *)ifa,
 			                                ifa->ifa_addr,
 			                                ifa_flags,
 );
 			if (sctp_ifa) {
 				sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 			}
 		}
 		ifnet_free_address_list(ifaddrlist);
 	}
 	ifnet_list_free(ifnetlist);
 }
 #endif
 #if defined(__FreeBSD__)
 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 *ifn;
 	struct ifaddr *ifa;
 	struct sctp_ifa *sctp_ifa;
 	uint32_t ifa_flags;
 #ifdef INET6
 	struct in6_ifaddr *ifa6;
 #endif
 	IFNET_RLOCK();
 	TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
 		if (sctp_is_desired_interface_type(ifn) == 0) {
 			/* non desired type */
 			continue;
 		}
 #if (__FreeBSD_version >= 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000
 		IF_ADDR_RLOCK(ifn);
 #else
 		IF_ADDR_LOCK(ifn);
 #endif
 		TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
 			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 unspecifed 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,
 );
 			if (sctp_ifa) {
 				sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 			}
 		}
 #if (__FreeBSD_version >= 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000
 		IF_ADDR_RUNLOCK(ifn);
 #else
 		IF_ADDR_UNLOCK(ifn);
 #endif
 	}
 	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;
 	/* 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 managment 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 unspecifed 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__)
 		                           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__)
 		                       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__)
 void
 sctp_add_or_del_interfaces(int (*pred)(struct ifnet *), int add)
 {
 	struct ifnet *ifn;
 	struct ifaddr *ifa;
 	IFNET_RLOCK();
 	TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
 		if (!(*pred)(ifn)) {
 			continue;
 		}
 		TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
 			sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE);
 		}
 	}
 	IFNET_RUNLOCK();
 }
 #endif
 #if defined(__APPLE__)
 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(__Userspace__)
   /*
    * __Userspace__
    * Using m_clget, which creates and mbuf and a cluster and
    * hooks those together.
    * TODO: This does not yet have functionality for jumbo packets.
    *
    */
 	int mbuf_threshold;
 	if (want_header) {
 		MGETHDR(m, how, type);
 	} else {
 		MGET(m, how, type);
 	}
 	if (m == NULL) {
 		return (NULL);
 	}
 	if (allonebuf == 0)
 		mbuf_threshold = SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count);
 	else
 		mbuf_threshold = 1;
 	if ((int)space_needed > (((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);
 		}
 	}
 	SCTP_BUF_LEN(m) = 0;
 	SCTP_BUF_NEXT(m) = SCTP_BUF_NEXT_PKT(m) = NULL;
 #if defined(__Userspace__)
 	/* __Userspace__
 	 * Check if anything need to be done to ensure logging works
 	 */
 #endif
 #ifdef SCTP_MBUF_LOGGING
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 		if (SCTP_BUF_IS_EXTENDED(m)) {
 			sctp_log_mb(m, SCTP_MBUF_IALLOC);
 		}
 	}
 #endif
 #elif defined(__FreeBSD__) && __FreeBSD_version > 602000
 	m =  m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
 	if (m == NULL) {
 		/* bad, no memory */
 		return (m);
 	}
 	if (allonebuf) {
 		int siz;
 		if (SCTP_BUF_IS_EXTENDED(m)) {
 			siz = SCTP_BUF_EXTEND_SIZE(m);
 		} else {
 			if (want_header)
 				siz = MHLEN;
 			else
 				siz = MLEN;
 		}
 		if (siz < space_needed) {
 			m_freem(m);
 			return (NULL);
 		}
 	}
 	if (SCTP_BUF_NEXT(m)) {
 		sctp_m_freem( SCTP_BUF_NEXT(m));
 		SCTP_BUF_NEXT(m) = NULL;
 	}
 #ifdef SCTP_MBUF_LOGGING
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 		if (SCTP_BUF_IS_EXTENDED(m)) {
 			sctp_log_mb(m, SCTP_MBUF_IALLOC);
 		}
 	}
 #endif
 #else
 #if defined(__FreeBSD__) && __FreeBSD_version >= 601000
 	int aloc_size;
 	int index = 0;
 #endif
 	int mbuf_threshold;
 	if (want_header) {
 		MGETHDR(m, how, type);
 	} else {
 		MGET(m, how, type);
 	}
 	if (m == NULL) {
 		return (NULL);
 	}
 	if (allonebuf == 0)
 		mbuf_threshold = SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count);
 	else
 		mbuf_threshold = 1;
 	if (space_needed > (((mbuf_threshold - 1) * MLEN) + MHLEN)) {
 #if defined(__FreeBSD__) && __FreeBSD_version >= 601000
 	try_again:
 		index = 4;
 		if (space_needed <= MCLBYTES) {
 			aloc_size = MCLBYTES;
 		} else {
 			aloc_size = MJUMPAGESIZE;
 			index = 5;
 		}
 		m_cljget(m, how, aloc_size);
 		if (m == NULL) {
 			return (NULL);
 		}
 		if (SCTP_BUF_IS_EXTENDED(m) == 0) {
 			if ((aloc_size != MCLBYTES) &&
 			   (allonebuf == 0)) {
 				aloc_size -= 10;
 				goto try_again;
 			}
 			sctp_m_freem(m);
 			return (NULL);
 		}
 #else
 		MCLGET(m, how);
 		if (m == NULL) {
 			return (NULL);
 		}
 		if (SCTP_BUF_IS_EXTENDED(m) == 0) {
 			sctp_m_freem(m);
 			return (NULL);
 		}
 #endif
 	}
 	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) {
 		if (SCTP_BUF_IS_EXTENDED(m)) {
 			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 tocopy, this_copy;
 	int *lenat;
 	int did_delay = 0;
 	tocopy = length;
 	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

The Tor Browser / annotate

netwerk/sctp/src/netinet/sctp_bsd_addr.c@4ab42b5ab56c (annotated)

netwerk/sctp/src/netinet/sctp_bsd_addr.c