/*- * 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 #include #include #include #include #include #include #include #include #include #include #include #include #if defined(__FreeBSD__) && !defined(__Userspace__) #include #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__) #define SCTP_BSD_FREE(x) HeapFree(GetProcessHeap(), 0, (x)) 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); SCTP_BSD_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; } } } } SCTP_BSD_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); SCTP_BSD_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; } } } } SCTP_BSD_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