diff options
Diffstat (limited to 'ext/sctp/usrsctp/usrsctplib/netinet/sctp_asconf.c')
| -rw-r--r-- | ext/sctp/usrsctp/usrsctplib/netinet/sctp_asconf.c | 3524 |
1 files changed, 3524 insertions, 0 deletions
diff --git a/ext/sctp/usrsctp/usrsctplib/netinet/sctp_asconf.c b/ext/sctp/usrsctp/usrsctplib/netinet/sctp_asconf.c new file mode 100644 index 000000000..81e2acfd5 --- /dev/null +++ b/ext/sctp/usrsctp/usrsctplib/netinet/sctp_asconf.c @@ -0,0 +1,3524 @@ +/*- + * 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. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: head/sys/netinet/sctp_asconf.c 363194 2020-07-14 20:32:50Z tuexen $"); +#endif + +#include <netinet/sctp_os.h> +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_pcb.h> +#include <netinet/sctp_header.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctp_timer.h> + +/* + * debug flags: + * SCTP_DEBUG_ASCONF1: protocol info, general info and errors + * SCTP_DEBUG_ASCONF2: detailed info + */ + +/* + * RFC 5061 + * + * An ASCONF parameter queue exists per asoc which holds the pending address + * operations. Lists are updated upon receipt of ASCONF-ACK. + * + * A restricted_addrs list exists per assoc to hold local addresses that are + * not (yet) usable by the assoc as a source address. These addresses are + * either pending an ASCONF operation (and exist on the ASCONF parameter + * queue), or they are permanently restricted (the peer has returned an + * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). + * + * Deleted addresses are always immediately removed from the lists as they will + * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, + * only if allowed. + */ + +/* + * ASCONF parameter processing. + * response_required: set if a reply is required (eg. SUCCESS_REPORT). + * returns a mbuf to an "error" response parameter or NULL/"success" if ok. + * FIX: allocating this many mbufs on the fly is pretty inefficient... + */ +static struct mbuf * +sctp_asconf_success_response(uint32_t id) +{ + struct mbuf *m_reply = NULL; + struct sctp_asconf_paramhdr *aph; + + m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), + 0, M_NOWAIT, 1, MT_DATA); + if (m_reply == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_success_response: couldn't get mbuf!\n"); + return (NULL); + } + aph = mtod(m_reply, struct sctp_asconf_paramhdr *); + aph->correlation_id = id; + aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); + aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); + SCTP_BUF_LEN(m_reply) = aph->ph.param_length; + aph->ph.param_length = htons(aph->ph.param_length); + + return (m_reply); +} + +static struct mbuf * +sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv, + uint16_t tlv_length) +{ + struct mbuf *m_reply = NULL; + struct sctp_asconf_paramhdr *aph; + struct sctp_error_cause *error; + uint32_t buf_len; + uint16_t i, param_length, cause_length, padding_length; + uint8_t *tlv; + + if (error_tlv == NULL) { + tlv_length = 0; + } + cause_length = sizeof(struct sctp_error_cause) + tlv_length; + param_length = sizeof(struct sctp_asconf_paramhdr) + cause_length; + padding_length = tlv_length % 4; + if (padding_length != 0) { + padding_length = 4 - padding_length; + } + buf_len = param_length + padding_length; + if (buf_len > MLEN) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_error_response: tlv_length (%xh) too big\n", + tlv_length); + return (NULL); + } + m_reply = sctp_get_mbuf_for_msg(buf_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_reply == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_error_response: couldn't get mbuf!\n"); + return (NULL); + } + aph = mtod(m_reply, struct sctp_asconf_paramhdr *); + aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); + aph->ph.param_length = htons(param_length); + aph->correlation_id = id; + error = (struct sctp_error_cause *)(aph + 1); + error->code = htons(cause); + error->length = htons(cause_length); + if (error_tlv != NULL) { + tlv = (uint8_t *) (error + 1); + memcpy(tlv, error_tlv, tlv_length); + for (i = 0; i < padding_length; i++) { + tlv[tlv_length + i] = 0; + } + } + SCTP_BUF_LEN(m_reply) = buf_len; + return (m_reply); +} + +static struct mbuf * +sctp_process_asconf_add_ip(struct sockaddr *src, struct sctp_asconf_paramhdr *aph, + struct sctp_tcb *stcb, int send_hb, int response_required) +{ + struct sctp_nets *net; + struct mbuf *m_reply = NULL; + union sctp_sockstore store; + struct sctp_paramhdr *ph; + uint16_t param_type, aparam_length; +#if defined(INET) || defined(INET6) + uint16_t param_length; +#endif + struct sockaddr *sa; + int zero_address = 0; + int bad_address = 0; +#ifdef INET + struct sockaddr_in *sin; + struct sctp_ipv4addr_param *v4addr; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sctp_ipv6addr_param *v6addr; +#endif + + aparam_length = ntohs(aph->ph.param_length); + if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { + return (NULL); + } + ph = (struct sctp_paramhdr *)(aph + 1); + param_type = ntohs(ph->param_type); +#if defined(INET) || defined(INET6) + param_length = ntohs(ph->param_length); + if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { + return (NULL); + } +#endif + sa = &store.sa; + switch (param_type) { +#ifdef INET + case SCTP_IPV4_ADDRESS: + if (param_length != sizeof(struct sctp_ipv4addr_param)) { + /* invalid param size */ + return (NULL); + } + v4addr = (struct sctp_ipv4addr_param *)ph; + sin = &store.sin; + memset(sin, 0, sizeof(*sin)); + sin->sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(struct sockaddr_in); +#endif + sin->sin_port = stcb->rport; + sin->sin_addr.s_addr = v4addr->addr; + if ((sin->sin_addr.s_addr == INADDR_BROADCAST) || + IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { + bad_address = 1; + } + if (sin->sin_addr.s_addr == INADDR_ANY) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + if (param_length != sizeof(struct sctp_ipv6addr_param)) { + /* invalid param size */ + return (NULL); + } + v6addr = (struct sctp_ipv6addr_param *)ph; + sin6 = &store.sin6; + memset(sin6, 0, sizeof(*sin6)); + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6->sin6_port = stcb->rport; + memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, + sizeof(struct in6_addr)); + if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { + bad_address = 1; + } + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif + default: + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, + aparam_length); + return (m_reply); + } /* end switch */ + + /* if 0.0.0.0/::0, add the source address instead */ + if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { + sa = src; + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_add_ip: using source addr "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); + } + net = NULL; + /* add the address */ + if (bad_address) { + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, + aparam_length); + } else if (sctp_add_remote_addr(stcb, sa, &net, stcb->asoc.port, + SCTP_DONOT_SETSCOPE, + SCTP_ADDR_DYNAMIC_ADDED) != 0) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_add_ip: error adding address\n"); + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, + aparam_length); + } else { + if (response_required) { + m_reply = + sctp_asconf_success_response(aph->correlation_id); + } + if (net != NULL) { + /* notify upper layer */ + sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); + sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); + sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, + stcb, net); + if (send_hb) { + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); + } + } + } + return (m_reply); +} + +static int +sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) +{ + struct sctp_nets *src_net, *net, *nnet; + + /* make sure the source address exists as a destination net */ + src_net = sctp_findnet(stcb, src); + if (src_net == NULL) { + /* not found */ + return (-1); + } + + /* delete all destination addresses except the source */ + TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { + if (net != src_net) { + /* delete this address */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_del_remote_addrs_except: deleting "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, + (struct sockaddr *)&net->ro._l_addr); + /* notify upper layer */ + sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, + (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); + sctp_remove_net(stcb, net); + } + } + return (0); +} + +static struct mbuf * +sctp_process_asconf_delete_ip(struct sockaddr *src, + struct sctp_asconf_paramhdr *aph, + struct sctp_tcb *stcb, int response_required) +{ + struct mbuf *m_reply = NULL; + union sctp_sockstore store; + struct sctp_paramhdr *ph; + uint16_t param_type, aparam_length; +#if defined(INET) || defined(INET6) + uint16_t param_length; +#endif + struct sockaddr *sa; + int zero_address = 0; + int result; +#ifdef INET + struct sockaddr_in *sin; + struct sctp_ipv4addr_param *v4addr; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sctp_ipv6addr_param *v6addr; +#endif + + aparam_length = ntohs(aph->ph.param_length); + if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { + return (NULL); + } + ph = (struct sctp_paramhdr *)(aph + 1); + param_type = ntohs(ph->param_type); +#if defined(INET) || defined(INET6) + param_length = ntohs(ph->param_length); + if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { + return (NULL); + } +#endif + sa = &store.sa; + switch (param_type) { +#ifdef INET + case SCTP_IPV4_ADDRESS: + if (param_length != sizeof(struct sctp_ipv4addr_param)) { + /* invalid param size */ + return (NULL); + } + v4addr = (struct sctp_ipv4addr_param *)ph; + sin = &store.sin; + memset(sin, 0, sizeof(*sin)); + sin->sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(struct sockaddr_in); +#endif + sin->sin_port = stcb->rport; + sin->sin_addr.s_addr = v4addr->addr; + if (sin->sin_addr.s_addr == INADDR_ANY) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_delete_ip: deleting "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + if (param_length != sizeof(struct sctp_ipv6addr_param)) { + /* invalid param size */ + return (NULL); + } + v6addr = (struct sctp_ipv6addr_param *)ph; + sin6 = &store.sin6; + memset(sin6, 0, sizeof(*sin6)); + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6->sin6_port = stcb->rport; + memcpy(&sin6->sin6_addr, v6addr->addr, + sizeof(struct in6_addr)); + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_delete_ip: deleting "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif + default: + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, + aparam_length); + return (m_reply); + } + + /* make sure the source address is not being deleted */ + if (sctp_cmpaddr(sa, src)) { + /* trying to delete the source address! */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, + aparam_length); + return (m_reply); + } + + /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ + if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { + result = sctp_asconf_del_remote_addrs_except(stcb, src); + + if (result) { + /* src address did not exist? */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); + /* what error to reply with?? */ + m_reply = + sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, + aparam_length); + } else if (response_required) { + m_reply = + sctp_asconf_success_response(aph->correlation_id); + } + return (m_reply); + } + + /* delete the address */ + result = sctp_del_remote_addr(stcb, sa); + /* + * note if result == -2, the address doesn't exist in the asoc but + * since it's being deleted anyways, we just ack the delete -- but + * this probably means something has already gone awry + */ + if (result == -1) { + /* only one address in the asoc */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, + aparam_length); + } else { + if (response_required) { + m_reply = sctp_asconf_success_response(aph->correlation_id); + } + /* notify upper layer */ + sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); + } + return (m_reply); +} + +static struct mbuf * +sctp_process_asconf_set_primary(struct sockaddr *src, + struct sctp_asconf_paramhdr *aph, + struct sctp_tcb *stcb, int response_required) +{ + struct mbuf *m_reply = NULL; + union sctp_sockstore store; + struct sctp_paramhdr *ph; + uint16_t param_type, aparam_length; +#if defined(INET) || defined(INET6) + uint16_t param_length; +#endif + struct sockaddr *sa; + int zero_address = 0; +#ifdef INET + struct sockaddr_in *sin; + struct sctp_ipv4addr_param *v4addr; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sctp_ipv6addr_param *v6addr; +#endif + + aparam_length = ntohs(aph->ph.param_length); + if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { + return (NULL); + } + ph = (struct sctp_paramhdr *)(aph + 1); + param_type = ntohs(ph->param_type); +#if defined(INET) || defined(INET6) + param_length = ntohs(ph->param_length); + if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { + return (NULL); + } +#endif + sa = &store.sa; + switch (param_type) { +#ifdef INET + case SCTP_IPV4_ADDRESS: + if (param_length != sizeof(struct sctp_ipv4addr_param)) { + /* invalid param size */ + return (NULL); + } + v4addr = (struct sctp_ipv4addr_param *)ph; + sin = &store.sin; + memset(sin, 0, sizeof(*sin)); + sin->sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(struct sockaddr_in); +#endif + sin->sin_addr.s_addr = v4addr->addr; + if (sin->sin_addr.s_addr == INADDR_ANY) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + if (param_length != sizeof(struct sctp_ipv6addr_param)) { + /* invalid param size */ + return (NULL); + } + v6addr = (struct sctp_ipv6addr_param *)ph; + sin6 = &store.sin6; + memset(sin6, 0, sizeof(*sin6)); + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(struct sockaddr_in6); +#endif + memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, + sizeof(struct in6_addr)); + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) + zero_address = 1; + SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + break; +#endif + default: + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, + aparam_length); + return (m_reply); + } + + /* if 0.0.0.0/::0, use the source address instead */ + if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { + sa = src; + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_set_primary: using source addr "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); + } + /* set the primary address */ + if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_set_primary: primary address set\n"); + /* notify upper layer */ + sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); + if ((stcb->asoc.primary_destination->dest_state & SCTP_ADDR_REACHABLE) && + (!(stcb->asoc.primary_destination->dest_state & SCTP_ADDR_PF)) && + (stcb->asoc.alternate)) { + sctp_free_remote_addr(stcb->asoc.alternate); + stcb->asoc.alternate = NULL; + } + if (response_required) { + m_reply = sctp_asconf_success_response(aph->correlation_id); + } + /* Mobility adaptation. + Ideally, when the reception of SET PRIMARY with DELETE IP + ADDRESS of the previous primary destination, unacknowledged + DATA are retransmitted immediately to the new primary + destination for seamless handover. + If the destination is UNCONFIRMED and marked to REQ_PRIM, + The retransmission occur when reception of the + HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in + sctp_input.c) + Also, when change of the primary destination, it is better + that all subsequent new DATA containing already queued DATA + are transmitted to the new primary destination. (by micchie) + */ + if ((sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_BASE) || + sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) && + sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_PRIM_DELETED) && + (stcb->asoc.primary_destination->dest_state & + SCTP_ADDR_UNCONFIRMED) == 0) { + + sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, + stcb->sctp_ep, stcb, NULL, + SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) { + sctp_assoc_immediate_retrans(stcb, + stcb->asoc.primary_destination); + } + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_BASE)) { + sctp_move_chunks_from_net(stcb, + stcb->asoc.deleted_primary); + } + sctp_delete_prim_timer(stcb->sctp_ep, stcb); + } + } else { + /* couldn't set the requested primary address! */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_asconf_set_primary: set primary failed!\n"); + /* must have been an invalid address, so report */ + m_reply = sctp_asconf_error_response(aph->correlation_id, + SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, + aparam_length); + } + + return (m_reply); +} + +/* + * handles an ASCONF chunk. + * if all parameters are processed ok, send a plain (empty) ASCONF-ACK + */ +void +sctp_handle_asconf(struct mbuf *m, unsigned int offset, + struct sockaddr *src, + struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, + int first) +{ + struct sctp_association *asoc; + uint32_t serial_num; + struct mbuf *n, *m_ack, *m_result, *m_tail; + struct sctp_asconf_ack_chunk *ack_cp; + struct sctp_asconf_paramhdr *aph; + struct sctp_ipv6addr_param *p_addr; + unsigned int asconf_limit, cnt; + int error = 0; /* did an error occur? */ + + /* asconf param buffer */ + uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; + struct sctp_asconf_ack *ack, *ack_next; + + /* verify minimum length */ + if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf: chunk too small = %xh\n", + ntohs(cp->ch.chunk_length)); + return; + } + asoc = &stcb->asoc; + serial_num = ntohl(cp->serial_number); + + if (SCTP_TSN_GE(asoc->asconf_seq_in, serial_num)) { + /* got a duplicate ASCONF */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf: got duplicate serial number = %xh\n", + serial_num); + return; + } else if (serial_num != (asoc->asconf_seq_in + 1)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", + serial_num, asoc->asconf_seq_in + 1); + return; + } + + /* it's the expected "next" sequence number, so process it */ + asoc->asconf_seq_in = serial_num; /* update sequence */ + /* get length of all the param's in the ASCONF */ + asconf_limit = offset + ntohs(cp->ch.chunk_length); + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf: asconf_limit=%u, sequence=%xh\n", + asconf_limit, serial_num); + + if (first) { + /* delete old cache */ + SCTPDBG(SCTP_DEBUG_ASCONF1,"handle_asconf: Now processing first ASCONF. Try to delete old cache\n"); + + TAILQ_FOREACH_SAFE(ack, &asoc->asconf_ack_sent, next, ack_next) { + if (ack->serial_number == serial_num) + break; + SCTPDBG(SCTP_DEBUG_ASCONF1,"handle_asconf: delete old(%u) < first(%u)\n", + ack->serial_number, serial_num); + TAILQ_REMOVE(&asoc->asconf_ack_sent, ack, next); + if (ack->data != NULL) { + sctp_m_freem(ack->data); + } + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); + } + } + + m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, + M_NOWAIT, 1, MT_DATA); + if (m_ack == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf: couldn't get mbuf!\n"); + return; + } + m_tail = m_ack; /* current reply chain's tail */ + + /* fill in ASCONF-ACK header */ + ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); + ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; + ack_cp->ch.chunk_flags = 0; + ack_cp->serial_number = htonl(serial_num); + /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ + SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); + ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); + + /* skip the lookup address parameter */ + offset += sizeof(struct sctp_asconf_chunk); + p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf); + if (p_addr == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf: couldn't get lookup addr!\n"); + /* respond with a missing/invalid mandatory parameter error */ + sctp_m_freem(m_ack); + return; + } + /* skip lookup addr */ + offset += SCTP_SIZE32(ntohs(p_addr->ph.param_length)); + /* get pointer to first asconf param in ASCONF */ + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf); + if (aph == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); + goto send_reply; + } + /* process through all parameters */ + cnt = 0; + while (aph != NULL) { + unsigned int param_length, param_type; + + param_type = ntohs(aph->ph.param_type); + param_length = ntohs(aph->ph.param_length); + if (offset + param_length > asconf_limit) { + /* parameter goes beyond end of chunk! */ + sctp_m_freem(m_ack); + return; + } + m_result = NULL; + + if (param_length > sizeof(aparam_buf)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); + sctp_m_freem(m_ack); + return; + } + if (param_length <= sizeof(struct sctp_paramhdr)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); + sctp_m_freem(m_ack); + return; + } + /* get the entire parameter */ + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); + if (aph == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); + sctp_m_freem(m_ack); + return; + } + switch (param_type) { + case SCTP_ADD_IP_ADDRESS: + m_result = sctp_process_asconf_add_ip(src, aph, stcb, + (cnt < SCTP_BASE_SYSCTL(sctp_hb_maxburst)), error); + cnt++; + break; + case SCTP_DEL_IP_ADDRESS: + m_result = sctp_process_asconf_delete_ip(src, aph, stcb, + error); + break; + case SCTP_ERROR_CAUSE_IND: + /* not valid in an ASCONF chunk */ + break; + case SCTP_SET_PRIM_ADDR: + m_result = sctp_process_asconf_set_primary(src, aph, + stcb, error); + break; + case SCTP_NAT_VTAGS: + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); + break; + case SCTP_SUCCESS_REPORT: + /* not valid in an ASCONF chunk */ + break; + case SCTP_ULP_ADAPTATION: + /* FIX */ + break; + default: + if ((param_type & 0x8000) == 0) { + /* Been told to STOP at this param */ + asconf_limit = offset; + /* + * FIX FIX - We need to call + * sctp_arethere_unrecognized_parameters() + * to get a operr and send it for any + * param's with the 0x4000 bit set OR do it + * here ourselves... note we still must STOP + * if the 0x8000 bit is clear. + */ + } + /* unknown/invalid param type */ + break; + } /* switch */ + + /* add any (error) result to the reply mbuf chain */ + if (m_result != NULL) { + SCTP_BUF_NEXT(m_tail) = m_result; + m_tail = m_result; + ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); + /* set flag to force success reports */ + error = 1; + } + offset += SCTP_SIZE32(param_length); + /* update remaining ASCONF message length to process */ + if (offset >= asconf_limit) { + /* no more data in the mbuf chain */ + break; + } + /* get pointer to next asconf param */ + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, + sizeof(struct sctp_asconf_paramhdr), + (uint8_t *)&aparam_buf); + if (aph == NULL) { + /* can't get an asconf paramhdr */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); + /* FIX ME - add error here... */ + } + } + + send_reply: + ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); + /* save the ASCONF-ACK reply */ + ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), + struct sctp_asconf_ack); + if (ack == NULL) { + sctp_m_freem(m_ack); + return; + } + ack->serial_number = serial_num; + ack->last_sent_to = NULL; + ack->data = m_ack; + ack->len = 0; + for (n = m_ack; n != NULL; n = SCTP_BUF_NEXT(n)) { + ack->len += SCTP_BUF_LEN(n); + } + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); + + /* see if last_control_chunk_from is set properly (use IP src addr) */ + if (stcb->asoc.last_control_chunk_from == NULL) { + /* + * this could happen if the source address was just newly + * added + */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); + SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, src); + /* look up the from address */ + stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, src); +#ifdef SCTP_DEBUG + if (stcb->asoc.last_control_chunk_from == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); + } +#endif + } +} + +/* + * does the address match? returns 0 if not, 1 if so + */ +static uint32_t +sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) +{ + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: + { + /* XXX scopeid */ + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; + + if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && + (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, + sizeof(struct in6_addr)) == 0)) { + return (1); + } + break; + } +#endif +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin = (struct sockaddr_in *)sa; + + if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && + (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, + sizeof(struct in_addr)) == 0)) { + return (1); + } + break; + } +#endif + default: + break; + } + return (0); +} + +/* + * does the address match? returns 0 if not, 1 if so + */ +static uint32_t +sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa) +{ +#if defined(INET) || defined(INET6) + uint16_t param_type, param_length; + + param_type = ntohs(ph->param_type); + param_length = ntohs(ph->param_length); +#endif + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: + { + /* XXX scopeid */ + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; + struct sctp_ipv6addr_param *v6addr; + + v6addr = (struct sctp_ipv6addr_param *)ph; + if ((param_type == SCTP_IPV6_ADDRESS) && + (param_length == sizeof(struct sctp_ipv6addr_param)) && + (memcmp(&v6addr->addr, &sin6->sin6_addr, + sizeof(struct in6_addr)) == 0)) { + return (1); + } + break; + } +#endif +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin = (struct sockaddr_in *)sa; + struct sctp_ipv4addr_param *v4addr; + + v4addr = (struct sctp_ipv4addr_param *)ph; + if ((param_type == SCTP_IPV4_ADDRESS) && + (param_length == sizeof(struct sctp_ipv4addr_param)) && + (memcmp(&v4addr->addr, &sin->sin_addr, + sizeof(struct in_addr)) == 0)) { + return (1); + } + break; + } +#endif + default: + break; + } + return (0); +} +/* + * Cleanup for non-responded/OP ERR'd ASCONF + */ +void +sctp_asconf_cleanup(struct sctp_tcb *stcb) +{ + /* + * clear out any existing asconfs going out + */ + sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, + SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); + stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; + /* remove the old ASCONF on our outbound queue */ + sctp_toss_old_asconf(stcb); +} + +/* + * cleanup any cached source addresses that may be topologically + * incorrect after a new address has been added to this interface. + */ +static void +sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) +{ + struct sctp_nets *net; + + /* + * Ideally, we want to only clear cached routes and source addresses + * that are topologically incorrect. But since there is no easy way + * to know whether the newly added address on the ifn would cause a + * routing change (i.e. a new egress interface would be chosen) + * without doing a new routing lookup and source address selection, + * we will (for now) just flush any cached route using a different + * ifn (and cached source addrs) and let output re-choose them during + * the next send on that net. + */ + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + /* + * clear any cached route (and cached source address) if the + * route's interface is NOT the same as the address change. + * If it's the same interface, just clear the cached source + * address. + */ + if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && + ((ifn == NULL) || + (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) { + /* clear any cached route */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + RTFREE(net->ro.ro_rt); + net->ro.ro_rt = NULL; +#endif + } + /* clear any cached source address */ + if (net->src_addr_selected) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + } + } +} + + +void +sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) +{ + int error; + + if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { + return; + } + if (stcb->asoc.deleted_primary == NULL) { + return; + } + + if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); + SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); + sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, + stcb->asoc.deleted_primary, + SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); + stcb->asoc.num_send_timers_up--; + if (stcb->asoc.num_send_timers_up < 0) { + stcb->asoc.num_send_timers_up = 0; + } + SCTP_TCB_LOCK_ASSERT(stcb); + error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, + stcb->asoc.deleted_primary); + if (error) { + SCTP_INP_DECR_REF(stcb->sctp_ep); + return; + } + SCTP_TCB_LOCK_ASSERT(stcb); +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary); +#endif + sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + if ((stcb->asoc.num_send_timers_up == 0) && + (stcb->asoc.sent_queue_cnt > 0)) { + struct sctp_tmit_chunk *chk; + + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); + } + } + } + return; +} + +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__) +static int +sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); + +void +sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + struct sctp_tmit_chunk *chk; + + SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); + sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, + SCTP_FROM_SCTP_ASCONF + SCTP_LOC_4); + stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); + net->error_count = 0; + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo == net) { + if (chk->sent < SCTP_DATAGRAM_RESEND) { + chk->sent = SCTP_DATAGRAM_RESEND; + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + sctp_flight_size_decrease(chk); + sctp_total_flight_decrease(stcb, chk); + net->marked_retrans++; + stcb->asoc.marked_retrans++; + } + } + } + if (net->marked_retrans) { + sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + } +} + +static void +sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) +{ + struct sctp_nets *net; + int addrnum, changed; + + /* If number of local valid addresses is 1, the valid address is + probably newly added address. + Several valid addresses in this association. A source address + may not be changed. Additionally, they can be configured on a + same interface as "alias" addresses. (by micchie) + */ + addrnum = sctp_local_addr_count(stcb); + SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", + addrnum); + if (addrnum == 1) { + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + /* clear any cached route and source address */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + if (net->ro.ro_rt) { + RTFREE(net->ro.ro_rt); + net->ro.ro_rt = NULL; + } +#endif + if (net->src_addr_selected) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + } + /* Retransmit unacknowledged DATA chunks immediately */ + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) { + sctp_net_immediate_retrans(stcb, net); + } + /* also, SET PRIMARY is maybe already sent */ + } + return; + } + + /* Multiple local addresses exsist in the association. */ + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + /* clear any cached route and source address */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + if (net->ro.ro_rt) { + RTFREE(net->ro.ro_rt); + net->ro.ro_rt = NULL; + } +#endif + if (net->src_addr_selected) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + } + /* Check if the nexthop is corresponding to the new address. + If the new address is corresponding to the current nexthop, + the path will be changed. + If the new address is NOT corresponding to the current + nexthop, the path will not be changed. + */ + SCTP_RTALLOC((sctp_route_t *)&net->ro, + stcb->sctp_ep->def_vrf_id, + stcb->sctp_ep->fibnum); +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (net->ro.ro_nh == NULL) +#else + if (net->ro.ro_rt == NULL) +#endif + continue; + + changed = 0; + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *)&net->ro)) { + changed = 1; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (sctp_v6src_match_nexthop( + &newifa->address.sin6, (sctp_route_t *)&net->ro)) { + changed = 1; + } + break; +#endif + default: + break; + } + /* if the newly added address does not relate routing + information, we skip. + */ + if (changed == 0) + continue; + /* Retransmit unacknowledged DATA chunks immediately */ + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) { + sctp_net_immediate_retrans(stcb, net); + } + /* Send SET PRIMARY for this new address */ + if (net == stcb->asoc.primary_destination) { + (void)sctp_asconf_queue_mgmt(stcb, newifa, + SCTP_SET_PRIM_ADDR); + } + } +} +#endif + +/* + * process an ADD/DELETE IP ack from peer. + * addr: corresponding sctp_ifa to the address being added/deleted. + * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. + * flag: 1=success, 0=failure. + */ +static void +sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, uint32_t flag) +{ + /* + * do the necessary asoc list work- if we get a failure indication, + * leave the address on the assoc's restricted list. If we get a + * success indication, remove the address from the restricted list. + */ + /* + * Note: this will only occur for ADD_IP_ADDRESS, since + * DEL_IP_ADDRESS is never actually added to the list... + */ + if (flag) { + /* success case, so remove from the restricted list */ + sctp_del_local_addr_restricted(stcb, addr); + +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__) + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_BASE) || + sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) { + sctp_path_check_and_react(stcb, addr); + return; + } +#endif + /* clear any cached/topologically incorrect source addresses */ + sctp_asconf_nets_cleanup(stcb, addr->ifn_p); + } + /* else, leave it on the list */ +} + +/* + * add an asconf add/delete/set primary IP address parameter to the queue. + * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. + * returns 0 if queued, -1 if not queued/removed. + * NOTE: if adding, but a delete for the same address is already scheduled + * (and not yet sent out), simply remove it from queue. Same for deleting + * an address already scheduled for add. If a duplicate operation is found, + * ignore the new one. + */ +static int +sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, + uint16_t type) +{ + struct sctp_asconf_addr *aa, *aa_next; + + /* make sure the request isn't already in the queue */ + TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { + /* address match? */ + if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) + continue; + /* is the request already in queue but not sent? + * pass the request already sent in order to resolve the following case: + * 1. arrival of ADD, then sent + * 2. arrival of DEL. we can't remove the ADD request already sent + * 3. arrival of ADD + */ + if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { + return (-1); + } + /* is the negative request already in queue, and not sent */ + if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && + (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { + /* add requested, delete already queued */ + TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); + /* remove the ifa from the restricted list */ + sctp_del_local_addr_restricted(stcb, ifa); + /* free the asconf param */ + SCTP_FREE(aa, SCTP_M_ASC_ADDR); + SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); + return (-1); + } + if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && + (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { + /* delete requested, add already queued */ + TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); + /* remove the aa->ifa from the restricted list */ + sctp_del_local_addr_restricted(stcb, aa->ifa); + /* free the asconf param */ + SCTP_FREE(aa, SCTP_M_ASC_ADDR); + SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); + return (-1); + } + } /* for each aa */ + + /* adding new request to the queue */ + SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), + SCTP_M_ASC_ADDR); + if (aa == NULL) { + /* didn't get memory */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); + return (-1); + } + aa->special_del = 0; + /* fill in asconf address parameter fields */ + /* top level elements are "networked" during send */ + aa->ap.aph.ph.param_type = type; + aa->ifa = ifa; + atomic_add_int(&ifa->refcount, 1); + /* correlation_id filled in during send routine later... */ + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + sin6 = &ifa->address.sin6; + aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; + aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); + aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + + sizeof(struct sctp_ipv6addr_param); + memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, + sizeof(struct in6_addr)); + break; + } +#endif +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + sin = &ifa->address.sin; + aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; + aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); + aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + + sizeof(struct sctp_ipv4addr_param); + memcpy(&aa->ap.addrp.addr, &sin->sin_addr, + sizeof(struct in_addr)); + break; + } +#endif + default: + /* invalid family! */ + SCTP_FREE(aa, SCTP_M_ASC_ADDR); + sctp_free_ifa(ifa); + return (-1); + } + aa->sent = 0; /* clear sent flag */ + + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); +#ifdef SCTP_DEBUG + if (SCTP_BASE_SYSCTL(sctp_debug_on) & SCTP_DEBUG_ASCONF2) { + if (type == SCTP_ADD_IP_ADDRESS) { + SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); + } else if (type == SCTP_DEL_IP_ADDRESS) { + SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); + } else { + SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, &ifa->address.sa); + } + } +#endif + + return (0); +} + + +/* + * add an asconf operation for the given ifa and type. + * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. + * returns 0 if completed, -1 if not completed, 1 if immediate send is + * advisable. + */ +static int +sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, + uint16_t type) +{ + uint32_t status; + int pending_delete_queued = 0; + int last; + + /* see if peer supports ASCONF */ + if (stcb->asoc.asconf_supported == 0) { + return (-1); + } + + /* + * if this is deleting the last address from the assoc, mark it as + * pending. + */ + if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending) { + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + last = (sctp_local_addr_count(stcb) == 0); + } else { + last = (sctp_local_addr_count(stcb) == 1); + } + if (last) { + /* set the pending delete info only */ + stcb->asoc.asconf_del_pending = 1; + stcb->asoc.asconf_addr_del_pending = ifa; + atomic_add_int(&ifa->refcount, 1); + SCTPDBG(SCTP_DEBUG_ASCONF2, + "asconf_queue_add: mark delete last address pending\n"); + return (-1); + } + } + + /* queue an asconf parameter */ + status = sctp_asconf_queue_mgmt(stcb, ifa, type); + + /* + * if this is an add, and there is a delete also pending (i.e. the + * last local address is being changed), queue the pending delete too. + */ + if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { + /* queue in the pending delete */ + if (sctp_asconf_queue_mgmt(stcb, + stcb->asoc.asconf_addr_del_pending, + SCTP_DEL_IP_ADDRESS) == 0) { + SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queuing pending delete\n"); + pending_delete_queued = 1; + /* clear out the pending delete info */ + stcb->asoc.asconf_del_pending = 0; + sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); + stcb->asoc.asconf_addr_del_pending = NULL; + } + } + + if (pending_delete_queued) { + struct sctp_nets *net; + /* + * since we know that the only/last address is now being + * changed in this case, reset the cwnd/rto on all nets to + * start as a new address and path. Also clear the error + * counts to give the assoc the best chance to complete the + * address change. + */ + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, + net); + net->RTO = 0; + net->error_count = 0; + } + stcb->asoc.overall_error_count = 0; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { + sctp_misc_ints(SCTP_THRESHOLD_CLEAR, + stcb->asoc.overall_error_count, + 0, + SCTP_FROM_SCTP_ASCONF, + __LINE__); + } + + /* queue in an advisory set primary too */ + (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); + /* let caller know we should send this out immediately */ + status = 1; + } + return (status); +} + +/*- + * add an asconf delete IP address parameter to the queue by sockaddr and + * possibly with no sctp_ifa available. This is only called by the routine + * that checks the addresses in an INIT-ACK against the current address list. + * returns 0 if completed, non-zero if not completed. + * NOTE: if an add is already scheduled (and not yet sent out), simply + * remove it from queue. If a duplicate operation is found, ignore the + * new one. + */ +static int +sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) +{ + struct sctp_ifa *ifa; + struct sctp_asconf_addr *aa, *aa_next; + + if (stcb == NULL) { + return (-1); + } + /* see if peer supports ASCONF */ + if (stcb->asoc.asconf_supported == 0) { + return (-1); + } + /* make sure the request isn't already in the queue */ + TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { + /* address match? */ + if (sctp_asconf_addr_match(aa, sa) == 0) + continue; + /* is the request already in queue (sent or not) */ + if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { + return (-1); + } + /* is the negative request already in queue, and not sent */ + if (aa->sent == 1) + continue; + if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { + /* add already queued, so remove existing entry */ + TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); + sctp_del_local_addr_restricted(stcb, aa->ifa); + /* free the entry */ + SCTP_FREE(aa, SCTP_M_ASC_ADDR); + return (-1); + } + } /* for each aa */ + + /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ + ifa = sctp_find_ifa_by_addr(sa, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); + + /* adding new request to the queue */ + SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), + SCTP_M_ASC_ADDR); + if (aa == NULL) { + /* didn't get memory */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_asconf_queue_sa_delete: failed to get memory!\n"); + return (-1); + } + aa->special_del = 0; + /* fill in asconf address parameter fields */ + /* top level elements are "networked" during send */ + aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; + aa->ifa = ifa; + if (ifa) + atomic_add_int(&ifa->refcount, 1); + /* correlation_id filled in during send routine later... */ + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: + { + /* IPv6 address */ + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)sa; + aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; + aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); + aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); + memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, + sizeof(struct in6_addr)); + break; + } +#endif +#ifdef INET + case AF_INET: + { + /* IPv4 address */ + struct sockaddr_in *sin = (struct sockaddr_in *)sa; + + aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; + aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); + aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); + memcpy(&aa->ap.addrp.addr, &sin->sin_addr, + sizeof(struct in_addr)); + break; + } +#endif + default: + /* invalid family! */ + SCTP_FREE(aa, SCTP_M_ASC_ADDR); + if (ifa) + sctp_free_ifa(ifa); + return (-1); + } + aa->sent = 0; /* clear sent flag */ + + /* delete goes to the back of the queue */ + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); + + /* sa_ignore MEMLEAK {memory is put on the tailq} */ + return (0); +} + +/* + * find a specific asconf param on our "sent" queue + */ +static struct sctp_asconf_addr * +sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) +{ + struct sctp_asconf_addr *aa; + + TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { + if (aa->ap.aph.correlation_id == correlation_id && + aa->sent == 1) { + /* found it */ + return (aa); + } + } + /* didn't find it */ + return (NULL); +} + +/* + * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do + * notifications based on the error response + */ +static void +sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED, + struct sctp_asconf_paramhdr *aph) +{ + struct sctp_error_cause *eh; + struct sctp_paramhdr *ph; + uint16_t param_type; + uint16_t error_code; + + eh = (struct sctp_error_cause *)(aph + 1); + ph = (struct sctp_paramhdr *)(eh + 1); + /* validate lengths */ + if (htons(eh->length) + sizeof(struct sctp_error_cause) > + htons(aph->ph.param_length)) { + /* invalid error cause length */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_process_error: cause element too long\n"); + return; + } + if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > + htons(eh->length)) { + /* invalid included TLV length */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "asconf_process_error: included TLV too long\n"); + return; + } + /* which error code ? */ + error_code = ntohs(eh->code); + param_type = ntohs(aph->ph.param_type); + /* FIX: this should go back up the REMOTE_ERROR ULP notify */ + switch (error_code) { + case SCTP_CAUSE_RESOURCE_SHORTAGE: + /* we allow ourselves to "try again" for this error */ + break; + default: + /* peer can't handle it... */ + switch (param_type) { + case SCTP_ADD_IP_ADDRESS: + case SCTP_DEL_IP_ADDRESS: + case SCTP_SET_PRIM_ADDR: + break; + default: + break; + } + } +} + +/* + * process an asconf queue param. + * aparam: parameter to process, will be removed from the queue. + * flag: 1=success case, 0=failure case + */ +static void +sctp_asconf_process_param_ack(struct sctp_tcb *stcb, + struct sctp_asconf_addr *aparam, uint32_t flag) +{ + uint16_t param_type; + + /* process this param */ + param_type = aparam->ap.aph.ph.param_type; + switch (param_type) { + case SCTP_ADD_IP_ADDRESS: + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_param_ack: added IP address\n"); + sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, flag); + break; + case SCTP_DEL_IP_ADDRESS: + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_param_ack: deleted IP address\n"); + /* nothing really to do... lists already updated */ + break; + case SCTP_SET_PRIM_ADDR: + SCTPDBG(SCTP_DEBUG_ASCONF1, + "process_param_ack: set primary IP address\n"); + /* nothing to do... peer may start using this addr */ + break; + default: + /* should NEVER happen */ + break; + } + + /* remove the param and free it */ + TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); + if (aparam->ifa) + sctp_free_ifa(aparam->ifa); + SCTP_FREE(aparam, SCTP_M_ASC_ADDR); +} + +/* + * cleanup from a bad asconf ack parameter + */ +static void +sctp_asconf_ack_clear(struct sctp_tcb *stcb SCTP_UNUSED) +{ + /* assume peer doesn't really know how to do asconfs */ + /* XXX we could free the pending queue here */ + +} + +void +sctp_handle_asconf_ack(struct mbuf *m, int offset, + struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, + struct sctp_nets *net, int *abort_no_unlock) +{ + struct sctp_association *asoc; + uint32_t serial_num; + uint16_t ack_length; + struct sctp_asconf_paramhdr *aph; + struct sctp_asconf_addr *aa, *aa_next; + uint32_t last_error_id = 0; /* last error correlation id */ + uint32_t id; + struct sctp_asconf_addr *ap; + + /* asconf param buffer */ + uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; + + /* verify minimum length */ + if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "handle_asconf_ack: chunk too small = %xh\n", + ntohs(cp->ch.chunk_length)); + return; + } + asoc = &stcb->asoc; + serial_num = ntohl(cp->serial_number); + + /* + * NOTE: we may want to handle this differently- currently, we will + * abort when we get an ack for the expected serial number + 1 (eg. + * we didn't send it), process an ack normally if it is the expected + * serial number, and re-send the previous ack for *ALL* other + * serial numbers + */ + + /* + * if the serial number is the next expected, but I didn't send it, + * abort the asoc, since someone probably just hijacked us... + */ + if (serial_num == (asoc->asconf_seq_out + 1)) { + struct mbuf *op_err; + char msg[SCTP_DIAG_INFO_LEN]; + + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); + SCTP_SNPRINTF(msg, sizeof(msg), "Never sent serial number %8.8x", serial_num); + op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg); + sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); + *abort_no_unlock = 1; + return; + } + if (serial_num != asoc->asconf_seq_out_acked + 1) { + /* got a duplicate/unexpected ASCONF-ACK */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", + serial_num, asoc->asconf_seq_out_acked + 1); + return; + } + + if (serial_num == asoc->asconf_seq_out - 1) { + /* stop our timer */ + sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, NULL, + SCTP_FROM_SCTP_ASCONF + SCTP_LOC_5); + } + + /* process the ASCONF-ACK contents */ + ack_length = ntohs(cp->ch.chunk_length) - + sizeof(struct sctp_asconf_ack_chunk); + offset += sizeof(struct sctp_asconf_ack_chunk); + /* process through all parameters */ + while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { + unsigned int param_length, param_type; + + /* get pointer to next asconf parameter */ + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, + sizeof(struct sctp_asconf_paramhdr), aparam_buf); + if (aph == NULL) { + /* can't get an asconf paramhdr */ + sctp_asconf_ack_clear(stcb); + return; + } + param_type = ntohs(aph->ph.param_type); + param_length = ntohs(aph->ph.param_length); + if (param_length > ack_length) { + sctp_asconf_ack_clear(stcb); + return; + } + if (param_length < sizeof(struct sctp_paramhdr)) { + sctp_asconf_ack_clear(stcb); + return; + } + /* get the complete parameter... */ + if (param_length > sizeof(aparam_buf)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "param length (%u) larger than buffer size!\n", param_length); + sctp_asconf_ack_clear(stcb); + return; + } + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); + if (aph == NULL) { + sctp_asconf_ack_clear(stcb); + return; + } + /* correlation_id is transparent to peer, no ntohl needed */ + id = aph->correlation_id; + + switch (param_type) { + case SCTP_ERROR_CAUSE_IND: + last_error_id = id; + /* find the corresponding asconf param in our queue */ + ap = sctp_asconf_find_param(stcb, id); + if (ap == NULL) { + /* hmm... can't find this in our queue! */ + break; + } + /* process the parameter, failed flag */ + sctp_asconf_process_param_ack(stcb, ap, 0); + /* process the error response */ + sctp_asconf_process_error(stcb, aph); + break; + case SCTP_SUCCESS_REPORT: + /* find the corresponding asconf param in our queue */ + ap = sctp_asconf_find_param(stcb, id); + if (ap == NULL) { + /* hmm... can't find this in our queue! */ + break; + } + /* process the parameter, success flag */ + sctp_asconf_process_param_ack(stcb, ap, 1); + break; + default: + break; + } /* switch */ + + /* update remaining ASCONF-ACK message length to process */ + if (ack_length > SCTP_SIZE32(param_length)) { + ack_length -= SCTP_SIZE32(param_length); + } else { + break; + } + offset += SCTP_SIZE32(param_length); + } /* while */ + + /* + * if there are any "sent" params still on the queue, these are + * implicitly "success", or "failed" (if we got an error back) ... + * so process these appropriately + * + * we assume that the correlation_id's are monotonically increasing + * beginning from 1 and that we don't have *that* many outstanding + * at any given time + */ + if (last_error_id == 0) + last_error_id--; /* set to "max" value */ + TAILQ_FOREACH_SAFE(aa, &stcb->asoc.asconf_queue, next, aa_next) { + if (aa->sent == 1) { + /* + * implicitly successful or failed if correlation_id + * < last_error_id, then success else, failure + */ + if (aa->ap.aph.correlation_id < last_error_id) + sctp_asconf_process_param_ack(stcb, aa, 1); + else + sctp_asconf_process_param_ack(stcb, aa, 0); + } else { + /* + * since we always process in order (FIFO queue) if + * we reach one that hasn't been sent, the rest + * should not have been sent either. so, we're + * done... + */ + break; + } + } + + /* update the next sequence number to use */ + asoc->asconf_seq_out_acked++; + /* remove the old ASCONF on our outbound queue */ + sctp_toss_old_asconf(stcb); + if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { +#ifdef SCTP_TIMER_BASED_ASCONF + /* we have more params, so restart our timer */ + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, + stcb, net); +#else + /* we have more params, so send out more */ + sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); +#endif + } +} + +#ifdef INET6 +static uint32_t +sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) +{ + struct sockaddr_in6 *sin6, *net6; + struct sctp_nets *net; + + if (sa->sa_family != AF_INET6) { + /* wrong family */ + return (0); + } + sin6 = (struct sockaddr_in6 *)sa; + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { + /* not link local address */ + return (0); + } + /* hunt through our destination nets list for this scope_id */ + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != + AF_INET6) + continue; + net6 = (struct sockaddr_in6 *)&net->ro._l_addr; + if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) + continue; + if (sctp_is_same_scope(sin6, net6)) { + /* found one */ + return (1); + } + } + /* didn't find one */ + return (0); +} +#endif + +/* + * address management functions + */ +static void +sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_ifa *ifa, uint16_t type, int addr_locked) +{ + int status; + + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 || + sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { + /* subset bound, no ASCONF allowed case, so ignore */ + return; + } + /* + * note: we know this is not the subset bound, no ASCONF case eg. + * this is boundall or subset bound w/ASCONF allowed + */ + + /* first, make sure that the address is IPv4 or IPv6 and not jailed */ + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &ifa->address.sin6.sin6_addr) != 0) { + return; + } +#endif + break; +#endif +#ifdef INET + case AF_INET: +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &ifa->address.sin.sin_addr) != 0) { + return; + } +#endif + break; +#endif + default: + return; + } +#ifdef INET6 + /* make sure we're "allowed" to add this type of addr */ + if (ifa->address.sa.sa_family == AF_INET6) { + /* invalid if we're not a v6 endpoint */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) + return; + /* is the v6 addr really valid ? */ + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + return; + } + } +#endif + /* put this address on the "pending/do not use yet" list */ + sctp_add_local_addr_restricted(stcb, ifa); + /* + * check address scope if address is out of scope, don't queue + * anything... note: this would leave the address on both inp and + * asoc lists + */ + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + sin6 = &ifa->address.sin6; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + /* we skip unspecifed addresses */ + return; + } + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { + if (stcb->asoc.scope.local_scope == 0) { + return; + } + /* is it the right link local scope? */ + if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { + return; + } + } + if (stcb->asoc.scope.site_scope == 0 && + IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { + return; + } + break; + } +#endif +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + /* invalid if we are a v6 only endpoint */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) + return; + + sin = &ifa->address.sin; + if (sin->sin_addr.s_addr == 0) { + /* we skip unspecifed addresses */ + return; + } + if (stcb->asoc.scope.ipv4_local_scope == 0 && + IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { + return; + } + break; + } +#endif + default: + /* else, not AF_INET or AF_INET6, so skip */ + return; + } + + /* queue an asconf for this address add/delete */ + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { + /* does the peer do asconf? */ + if (stcb->asoc.asconf_supported) { + /* queue an asconf for this addr */ + status = sctp_asconf_queue_add(stcb, ifa, type); + + /* + * if queued ok, and in the open state, send out the + * ASCONF. If in the non-open state, these will be + * sent when the state goes open. + */ + if (status == 0 && + ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED))) { +#ifdef SCTP_TIMER_BASED_ASCONF + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, + stcb, stcb->asoc.primary_destination); +#else + sctp_send_asconf(stcb, NULL, addr_locked); +#endif + } + } + } +} + + +int +sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) +{ + struct sctp_asconf_iterator *asc; + struct sctp_ifa *ifa; + struct sctp_laddr *l; + int cnt_invalid = 0; + + asc = (struct sctp_asconf_iterator *)ptr; + LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { + ifa = l->ifa; + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + /* invalid if we're not a v6 endpoint */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return (1); + } + break; +#endif +#ifdef INET + case AF_INET: + { + /* invalid if we are a v6 only endpoint */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return (1); + } + break; + } +#endif + default: + /* invalid address family */ + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return (1); + } + } + return (0); +} + +static int +sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val SCTP_UNUSED) +{ + struct sctp_ifa *ifa; + struct sctp_asconf_iterator *asc; + struct sctp_laddr *laddr, *nladdr, *l; + + /* Only for specific case not bound all */ + asc = (struct sctp_asconf_iterator *)ptr; + LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { + ifa = l->ifa; + if (l->action == SCTP_ADD_IP_ADDRESS) { + LIST_FOREACH(laddr, &inp->sctp_addr_list, + sctp_nxt_addr) { + if (laddr->ifa == ifa) { + laddr->action = 0; + break; + } + + } + } else if (l->action == SCTP_DEL_IP_ADDRESS) { + LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { + /* remove only after all guys are done */ + if (laddr->ifa == ifa) { + sctp_del_local_addr_ep(inp, ifa); + } + } + } + } + return (0); +} + +void +sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + void *ptr, uint32_t val SCTP_UNUSED) +{ + struct sctp_asconf_iterator *asc; + struct sctp_ifa *ifa; + struct sctp_laddr *l; + int cnt_invalid = 0; + int type, status; + int num_queued = 0; + + asc = (struct sctp_asconf_iterator *)ptr; + LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { + ifa = l->ifa; + type = l->action; + + /* address's vrf_id must be the vrf_id of the assoc */ + if (ifa->vrf_id != stcb->asoc.vrf_id) { + continue; + } + + /* Same checks again for assoc */ + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + { + /* invalid if we're not a v6 endpoint */ + struct sockaddr_in6 *sin6; + + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return; + else + continue; + } + sin6 = &ifa->address.sin6; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + /* we skip unspecifed addresses */ + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + continue; + } +#endif + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { + if (stcb->asoc.scope.local_scope == 0) { + continue; + } + /* is it the right link local scope? */ + if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { + continue; + } + } + break; + } +#endif +#ifdef INET + case AF_INET: + { + /* invalid if we are a v6 only endpoint */ + struct sockaddr_in *sin; + + /* invalid if we are a v6 only endpoint */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) + continue; + + sin = &ifa->address.sin; + if (sin->sin_addr.s_addr == 0) { + /* we skip unspecifed addresses */ + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + continue; + } +#endif + if (stcb->asoc.scope.ipv4_local_scope == 0 && + IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { + continue; + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return; + else + continue; + } + break; + } +#endif + default: + /* invalid address family */ + cnt_invalid++; + if (asc->cnt == cnt_invalid) + return; + else + continue; + break; + } + + if (type == SCTP_ADD_IP_ADDRESS) { + /* prevent this address from being used as a source */ + sctp_add_local_addr_restricted(stcb, ifa); + } else if (type == SCTP_DEL_IP_ADDRESS) { + struct sctp_nets *net; + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + /* delete this address if cached */ + if (net->ro._s_addr == ifa) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + if (net->ro.ro_rt) { + RTFREE(net->ro.ro_rt); + net->ro.ro_rt = NULL; + } +#endif + /* + * Now we deleted our src address, + * should we not also now reset the + * cwnd/rto to start as if its a new + * address? + */ + stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); + net->RTO = 0; + + } + } + } else if (type == SCTP_SET_PRIM_ADDR) { + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { + /* must validate the ifa is in the ep */ + if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { + continue; + } + } else { + /* Need to check scopes for this guy */ + if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { + continue; + } + } + } + /* queue an asconf for this address add/delete */ + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && + stcb->asoc.asconf_supported == 1) { + /* queue an asconf for this addr */ + status = sctp_asconf_queue_add(stcb, ifa, type); + /* + * if queued ok, and in the open state, update the + * count of queued params. If in the non-open state, + * these get sent when the assoc goes open. + */ + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + if (status >= 0) { + num_queued++; + } + } + } + } + /* + * If we have queued params in the open state, send out an ASCONF. + */ + if (num_queued > 0) { + sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); + } +} + +void +sctp_asconf_iterator_end(void *ptr, uint32_t val SCTP_UNUSED) +{ + struct sctp_asconf_iterator *asc; + struct sctp_ifa *ifa; + struct sctp_laddr *l, *nl; + + asc = (struct sctp_asconf_iterator *)ptr; + LIST_FOREACH_SAFE(l, &asc->list_of_work, sctp_nxt_addr, nl) { + ifa = l->ifa; + if (l->action == SCTP_ADD_IP_ADDRESS) { + /* Clear the defer use flag */ + ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; + } + sctp_free_ifa(ifa); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); + SCTP_DECR_LADDR_COUNT(); + } + SCTP_FREE(asc, SCTP_M_ASC_IT); +} + +/* + * sa is the sockaddr to ask the peer to set primary to. + * returns: 0 = completed, -1 = error + */ +int32_t +sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) +{ + uint32_t vrf_id; + struct sctp_ifa *ifa; + + /* find the ifa for the desired set primary */ + vrf_id = stcb->asoc.vrf_id; + ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); + if (ifa == NULL) { + /* Invalid address */ + return (-1); + } + + /* queue an ASCONF:SET_PRIM_ADDR to be sent */ + if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { + /* set primary queuing succeeded */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "set_primary_ip_address_sa: queued on tcb=%p, ", + (void *)stcb); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { +#ifdef SCTP_TIMER_BASED_ASCONF + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, + stcb->sctp_ep, stcb, + stcb->asoc.primary_destination); +#else + sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); +#endif + } + } else { + SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", + (void *)stcb); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); + return (-1); + } + return (0); +} + +int +sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) +{ + struct sctp_tmit_chunk *chk, *nchk; + unsigned int offset, asconf_limit; + struct sctp_asconf_chunk *acp; + struct sctp_asconf_paramhdr *aph; + uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; + struct sctp_paramhdr *ph; + int add_cnt, del_cnt; + uint16_t last_param_type; + + add_cnt = del_cnt = 0; + last_param_type = 0; + TAILQ_FOREACH_SAFE(chk, &stcb->asoc.asconf_send_queue, sctp_next, nchk) { + if (chk->data == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); + continue; + } + offset = 0; + acp = mtod(chk->data, struct sctp_asconf_chunk *); + offset += sizeof(struct sctp_asconf_chunk); + asconf_limit = ntohs(acp->ch.chunk_length); + ph = (struct sctp_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); + if (ph == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); + continue; + } + offset += ntohs(ph->param_length); + + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); + if (aph == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); + continue; + } + while (aph != NULL) { + unsigned int param_length, param_type; + + param_type = ntohs(aph->ph.param_type); + param_length = ntohs(aph->ph.param_length); + if (offset + param_length > asconf_limit) { + /* parameter goes beyond end of chunk! */ + break; + } + if (param_length > sizeof(aparam_buf)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); + break; + } + if (param_length <= sizeof(struct sctp_paramhdr)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); + break; + } + + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); + if (aph == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); + break; + } + + ph = (struct sctp_paramhdr *)(aph + 1); + if (sctp_addr_match(ph, &sctp_ifa->address.sa) != 0) { + switch (param_type) { + case SCTP_ADD_IP_ADDRESS: + add_cnt++; + break; + case SCTP_DEL_IP_ADDRESS: + del_cnt++; + break; + default: + break; + } + last_param_type = param_type; + } + + offset += SCTP_SIZE32(param_length); + if (offset >= asconf_limit) { + /* no more data in the mbuf chain */ + break; + } + /* get pointer to next asconf param */ + aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); + } + } + + /* we want to find the sequences which consist of ADD -> DEL -> ADD or DEL -> ADD */ + if (add_cnt > del_cnt || + (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { + return (1); + } + return (0); +} + +static struct sockaddr * +sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) +{ + struct sctp_vrf *vrf = NULL; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa; + + if (addr_locked == SCTP_ADDR_NOT_LOCKED) + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(stcb->asoc.vrf_id); + if (vrf == NULL) { + if (addr_locked == SCTP_ADDR_NOT_LOCKED) + SCTP_IPI_ADDR_RUNLOCK(); + return (NULL); + } + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if (stcb->asoc.scope.loopback_scope == 0 && + SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + /* Skip if loopback_scope not set */ + continue; + } + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { + switch (sctp_ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + if (stcb->asoc.scope.ipv4_addr_legal) { + struct sockaddr_in *sin; + + sin = &sctp_ifa->address.sin; + if (sin->sin_addr.s_addr == 0) { + /* skip unspecifed addresses */ + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + continue; + } +#endif + if (stcb->asoc.scope.ipv4_local_scope == 0 && + IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) + continue; + + if (sctp_is_addr_restricted(stcb, sctp_ifa) && + (!sctp_is_addr_pending(stcb, sctp_ifa))) + continue; + /* found a valid local v4 address to use */ + if (addr_locked == SCTP_ADDR_NOT_LOCKED) + SCTP_IPI_ADDR_RUNLOCK(); + return (&sctp_ifa->address.sa); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (stcb->asoc.scope.ipv6_addr_legal) { + struct sockaddr_in6 *sin6; + + if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + continue; + } + + sin6 = &sctp_ifa->address.sin6; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + /* we skip unspecifed addresses */ + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + continue; + } +#endif + if (stcb->asoc.scope.local_scope == 0 && + IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) + continue; + if (stcb->asoc.scope.site_scope == 0 && + IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) + continue; + + if (sctp_is_addr_restricted(stcb, sctp_ifa) && + (!sctp_is_addr_pending(stcb, sctp_ifa))) + continue; + /* found a valid local v6 address to use */ + if (addr_locked == SCTP_ADDR_NOT_LOCKED) + SCTP_IPI_ADDR_RUNLOCK(); + return (&sctp_ifa->address.sa); + } + break; +#endif + default: + break; + } + } + } + /* no valid addresses found */ + if (addr_locked == SCTP_ADDR_NOT_LOCKED) + SCTP_IPI_ADDR_RUNLOCK(); + return (NULL); +} + +static struct sockaddr * +sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) +{ + struct sctp_laddr *laddr; + + LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + continue; + } + /* is the address restricted ? */ + if (sctp_is_addr_restricted(stcb, laddr->ifa) && + (!sctp_is_addr_pending(stcb, laddr->ifa))) + continue; + + /* found a valid local address to use */ + return (&laddr->ifa->address.sa); + } + /* no valid addresses found */ + return (NULL); +} + +/* + * builds an ASCONF chunk from queued ASCONF params. + * returns NULL on error (no mbuf, no ASCONF params queued, etc). + */ +struct mbuf * +sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) +{ + struct mbuf *m_asconf, *m_asconf_chk; + struct sctp_asconf_addr *aa; + struct sctp_asconf_chunk *acp; + struct sctp_asconf_paramhdr *aph; + struct sctp_asconf_addr_param *aap; + uint32_t p_length; + uint32_t correlation_id = 1; /* 0 is reserved... */ + caddr_t ptr, lookup_ptr; + uint8_t lookup_used = 0; + + /* are there any asconf params to send? */ + TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { + if (aa->sent == 0) + break; + } + if (aa == NULL) + return (NULL); + + /* + * get a chunk header mbuf and a cluster for the asconf params since + * it's simpler to fill in the asconf chunk header lookup address on + * the fly + */ + m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_NOWAIT, 1, MT_DATA); + if (m_asconf_chk == NULL) { + /* no mbuf's */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_compose_asconf: couldn't get chunk mbuf!\n"); + return (NULL); + } + m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (m_asconf == NULL) { + /* no mbuf's */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_compose_asconf: couldn't get mbuf!\n"); + sctp_m_freem(m_asconf_chk); + return (NULL); + } + SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); + SCTP_BUF_LEN(m_asconf) = 0; + acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); + memset(acp, 0, sizeof(struct sctp_asconf_chunk)); + /* save pointers to lookup address and asconf params */ + lookup_ptr = (caddr_t)(acp + 1); /* after the header */ + ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ + + /* fill in chunk header info */ + acp->ch.chunk_type = SCTP_ASCONF; + acp->ch.chunk_flags = 0; + acp->serial_number = htonl(stcb->asoc.asconf_seq_out); + stcb->asoc.asconf_seq_out++; + + /* add parameters... up to smallest MTU allowed */ + TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { + if (aa->sent) + continue; + /* get the parameter length */ + p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); + /* will it fit in current chunk? */ + if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) || + (SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) { + /* won't fit, so we're done with this chunk */ + break; + } + /* assign (and store) a correlation id */ + aa->ap.aph.correlation_id = correlation_id++; + + /* + * fill in address if we're doing a delete this is a simple + * way for us to fill in the correlation address, which + * should only be used by the peer if we're deleting our + * source address and adding a new address (e.g. renumbering + * case) + */ + if (lookup_used == 0 && + (aa->special_del == 0) && + aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { + struct sctp_ipv6addr_param *lookup; + uint16_t p_size, addr_size; + + lookup = (struct sctp_ipv6addr_param *)lookup_ptr; + lookup->ph.param_type = + htons(aa->ap.addrp.ph.param_type); + if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { + /* copy IPv6 address */ + p_size = sizeof(struct sctp_ipv6addr_param); + addr_size = sizeof(struct in6_addr); + } else { + /* copy IPv4 address */ + p_size = sizeof(struct sctp_ipv4addr_param); + addr_size = sizeof(struct in_addr); + } + lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); + memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); + SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); + lookup_used = 1; + } + /* copy into current space */ + memcpy(ptr, &aa->ap, p_length); + + /* network elements and update lengths */ + aph = (struct sctp_asconf_paramhdr *)ptr; + aap = (struct sctp_asconf_addr_param *)ptr; + /* correlation_id is transparent to peer, no htonl needed */ + aph->ph.param_type = htons(aph->ph.param_type); + aph->ph.param_length = htons(aph->ph.param_length); + aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); + aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); + + SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); + ptr += SCTP_SIZE32(p_length); + + /* + * these params are removed off the pending list upon + * getting an ASCONF-ACK back from the peer, just set flag + */ + aa->sent = 1; + } + /* check to see if the lookup addr has been populated yet */ + if (lookup_used == 0) { + /* NOTE: if the address param is optional, can skip this... */ + /* add any valid (existing) address... */ + struct sctp_ipv6addr_param *lookup; + uint16_t p_size, addr_size; + struct sockaddr *found_addr; + caddr_t addr_ptr; + + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) + found_addr = sctp_find_valid_localaddr(stcb, + addr_locked); + else + found_addr = sctp_find_valid_localaddr_ep(stcb); + + lookup = (struct sctp_ipv6addr_param *)lookup_ptr; + if (found_addr != NULL) { + switch (found_addr->sa_family) { +#ifdef INET6 + case AF_INET6: + /* copy IPv6 address */ + lookup->ph.param_type = + htons(SCTP_IPV6_ADDRESS); + p_size = sizeof(struct sctp_ipv6addr_param); + addr_size = sizeof(struct in6_addr); + addr_ptr = (caddr_t)&((struct sockaddr_in6 *) + found_addr)->sin6_addr; + break; +#endif +#ifdef INET + case AF_INET: + /* copy IPv4 address */ + lookup->ph.param_type = + htons(SCTP_IPV4_ADDRESS); + p_size = sizeof(struct sctp_ipv4addr_param); + addr_size = sizeof(struct in_addr); + addr_ptr = (caddr_t)&((struct sockaddr_in *) + found_addr)->sin_addr; + break; +#endif + default: + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_compose_asconf: no usable lookup addr (family = %d)!\n", + found_addr->sa_family); + sctp_m_freem(m_asconf_chk); + sctp_m_freem(m_asconf); + return (NULL); + } + lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); + memcpy(lookup->addr, addr_ptr, addr_size); + SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); + } else { + /* uh oh... don't have any address?? */ + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_compose_asconf: no lookup addr!\n"); + sctp_m_freem(m_asconf_chk); + sctp_m_freem(m_asconf); + return (NULL); + } + } + /* chain it all together */ + SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; + *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); + acp->ch.chunk_length = htons(*retlen); + + return (m_asconf_chk); +} + +/* + * section to handle address changes before an association is up eg. changes + * during INIT/INIT-ACK/COOKIE-ECHO handshake + */ + +/* + * processes the (local) addresses in the INIT-ACK chunk + */ +static void +sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, + unsigned int offset, unsigned int length) +{ + struct sctp_paramhdr tmp_param, *ph; + uint16_t plen, ptype; + struct sctp_ifa *sctp_ifa; + union sctp_sockstore store; +#ifdef INET6 + struct sctp_ipv6addr_param addr6_store; +#endif +#ifdef INET + struct sctp_ipv4addr_param addr4_store; +#endif + + SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); + if (stcb == NULL) /* Un-needed check for SA */ + return; + + /* convert to upper bound */ + length += offset; + + if ((offset + sizeof(struct sctp_paramhdr)) > length) { + return; + } + /* go through the addresses in the init-ack */ + ph = (struct sctp_paramhdr *) + sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), + (uint8_t *)&tmp_param); + while (ph != NULL) { + ptype = ntohs(ph->param_type); + plen = ntohs(ph->param_length); + switch (ptype) { +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + { + struct sctp_ipv6addr_param *a6p; + + /* get the entire IPv6 address param */ + a6p = (struct sctp_ipv6addr_param *) + sctp_m_getptr(m, offset, + sizeof(struct sctp_ipv6addr_param), + (uint8_t *)&addr6_store); + if (plen != sizeof(struct sctp_ipv6addr_param) || + a6p == NULL) { + return; + } + memset(&store, 0, sizeof(union sctp_sockstore)); + store.sin6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + store.sin6.sin6_len = sizeof(struct sockaddr_in6); +#endif + store.sin6.sin6_port = stcb->rport; + memcpy(&store.sin6.sin6_addr, a6p->addr, sizeof(struct in6_addr)); + break; + } +#endif +#ifdef INET + case SCTP_IPV4_ADDRESS: + { + struct sctp_ipv4addr_param *a4p; + + /* get the entire IPv4 address param */ + a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, + sizeof(struct sctp_ipv4addr_param), + (uint8_t *)&addr4_store); + if (plen != sizeof(struct sctp_ipv4addr_param) || + a4p == NULL) { + return; + } + memset(&store, 0, sizeof(union sctp_sockstore)); + store.sin.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + store.sin.sin_len = sizeof(struct sockaddr_in); +#endif + store.sin.sin_port = stcb->rport; + store.sin.sin_addr.s_addr = a4p->addr; + break; + } +#endif + default: + goto next_addr; + } + + /* see if this address really (still) exists */ + sctp_ifa = sctp_find_ifa_by_addr(&store.sa, stcb->asoc.vrf_id, + SCTP_ADDR_NOT_LOCKED); + if (sctp_ifa == NULL) { + /* address doesn't exist anymore */ + int status; + + /* are ASCONFs allowed ? */ + if ((sctp_is_feature_on(stcb->sctp_ep, + SCTP_PCB_FLAGS_DO_ASCONF)) && + stcb->asoc.asconf_supported) { + /* queue an ASCONF DEL_IP_ADDRESS */ + status = sctp_asconf_queue_sa_delete(stcb, &store.sa); + /* + * if queued ok, and in correct state, send + * out the ASCONF. + */ + if (status == 0 && + SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { +#ifdef SCTP_TIMER_BASED_ASCONF + sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, + stcb->sctp_ep, stcb, + stcb->asoc.primary_destination); +#else + sctp_send_asconf(stcb, NULL, SCTP_ADDR_NOT_LOCKED); +#endif + } + } + } + +next_addr: + /* + * Sanity check: Make sure the length isn't 0, otherwise + * we'll be stuck in this loop for a long time... + */ + if (SCTP_SIZE32(plen) == 0) { + SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", + plen, ptype); + return; + } + /* get next parameter */ + offset += SCTP_SIZE32(plen); + if ((offset + sizeof(struct sctp_paramhdr)) > length) + return; + ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, + sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param); + } /* while */ +} + +/* FIX ME: need to verify return result for v6 address type if v6 disabled */ +/* + * checks to see if a specific address is in the initack address list returns + * 1 if found, 0 if not + */ +static uint32_t +sctp_addr_in_initack(struct mbuf *m, uint32_t offset, uint32_t length, struct sockaddr *sa) +{ + struct sctp_paramhdr tmp_param, *ph; + uint16_t plen, ptype; +#ifdef INET + struct sockaddr_in *sin; + struct sctp_ipv4addr_param *a4p; + struct sctp_ipv6addr_param addr4_store; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sctp_ipv6addr_param *a6p; + struct sctp_ipv6addr_param addr6_store; +#ifdef SCTP_EMBEDDED_V6_SCOPE + struct sockaddr_in6 sin6_tmp; +#endif +#endif + + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + break; +#endif +#ifdef INET6 + case AF_INET6: + break; +#endif + default: + return (0); + } + + SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); + /* convert to upper bound */ + length += offset; + + if ((offset + sizeof(struct sctp_paramhdr)) > length) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "find_initack_addr: invalid offset?\n"); + return (0); + } + /* go through the addresses in the init-ack */ + ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, + sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); + while (ph != NULL) { + ptype = ntohs(ph->param_type); + plen = ntohs(ph->param_length); + switch (ptype) { +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + if (sa->sa_family == AF_INET6) { + /* get the entire IPv6 address param */ + if (plen != sizeof(struct sctp_ipv6addr_param)) { + break; + } + /* get the entire IPv6 address param */ + a6p = (struct sctp_ipv6addr_param *) + sctp_m_getptr(m, offset, + sizeof(struct sctp_ipv6addr_param), + (uint8_t *)&addr6_store); + if (a6p == NULL) { + return (0); + } + sin6 = (struct sockaddr_in6 *)sa; +#ifdef SCTP_EMBEDDED_V6_SCOPE + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { + /* create a copy and clear scope */ + memcpy(&sin6_tmp, sin6, + sizeof(struct sockaddr_in6)); + sin6 = &sin6_tmp; + in6_clearscope(&sin6->sin6_addr); + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + if (memcmp(&sin6->sin6_addr, a6p->addr, + sizeof(struct in6_addr)) == 0) { + /* found it */ + return (1); + } + } + break; +#endif /* INET6 */ +#ifdef INET + case SCTP_IPV4_ADDRESS: + if (sa->sa_family == AF_INET) { + if (plen != sizeof(struct sctp_ipv4addr_param)) { + break; + } + /* get the entire IPv4 address param */ + a4p = (struct sctp_ipv4addr_param *) + sctp_m_getptr(m, offset, + sizeof(struct sctp_ipv4addr_param), + (uint8_t *)&addr4_store); + if (a4p == NULL) { + return (0); + } + sin = (struct sockaddr_in *)sa; + if (sin->sin_addr.s_addr == a4p->addr) { + /* found it */ + return (1); + } + } + break; +#endif + default: + break; + } + /* get next parameter */ + offset += SCTP_SIZE32(plen); + if (offset + sizeof(struct sctp_paramhdr) > length) { + return (0); + } + ph = (struct sctp_paramhdr *) + sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), + (uint8_t *) & tmp_param); + } /* while */ + /* not found! */ + return (0); +} + +/* + * makes sure that the current endpoint local addr list is consistent with + * the new association (eg. subset bound, asconf allowed) adds addresses as + * necessary + */ +static void +sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, + int length, struct sockaddr *init_addr) +{ + struct sctp_laddr *laddr; + + /* go through the endpoint list */ + LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { + /* be paranoid and validate the laddr */ + if (laddr->ifa == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, + "check_addr_list_ep: laddr->ifa is NULL"); + continue; + } + /* do i have it implicitly? */ + if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { + continue; + } + /* check to see if in the init-ack */ + if (!sctp_addr_in_initack(m, offset, length, &laddr->ifa->address.sa)) { + /* try to add it */ + sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, + SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); + } + } +} + +/* + * makes sure that the current kernel address list is consistent with the new + * association (with all addrs bound) adds addresses as necessary + */ +static void +sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, + int length, struct sockaddr *init_addr, + uint16_t local_scope, uint16_t site_scope, + uint16_t ipv4_scope, uint16_t loopback_scope) +{ + struct sctp_vrf *vrf = NULL; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa; + uint32_t vrf_id; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif + + if (stcb) { + vrf_id = stcb->asoc.vrf_id; + } else { + return; + } + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + SCTP_IPI_ADDR_RUNLOCK(); + return; + } + /* go through all our known interfaces */ + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + /* skip loopback interface */ + continue; + } + /* go through each interface address */ + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { + /* do i have it implicitly? */ + if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { + continue; + } + switch (sctp_ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + sin = &sctp_ifa->address.sin; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + continue; + } +#endif + if ((ipv4_scope == 0) && + (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { + /* private address not in scope */ + continue; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + sin6 = &sctp_ifa->address.sin6; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + continue; + } +#endif + if ((local_scope == 0) && + (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { + continue; + } + if ((site_scope == 0) && + (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { + continue; + } + break; +#endif + default: + break; + } + /* check to see if in the init-ack */ + if (!sctp_addr_in_initack(m, offset, length, &sctp_ifa->address.sa)) { + /* try to add it */ + sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, + sctp_ifa, SCTP_ADD_IP_ADDRESS, + SCTP_ADDR_LOCKED); + } + } /* end foreach ifa */ + } /* end foreach ifn */ + SCTP_IPI_ADDR_RUNLOCK(); +} + +/* + * validates an init-ack chunk (from a cookie-echo) with current addresses + * adds addresses from the init-ack into our local address list, if needed + * queues asconf adds/deletes addresses as needed and makes appropriate list + * changes for source address selection m, offset: points to the start of the + * address list in an init-ack chunk length: total length of the address + * params only init_addr: address where my INIT-ACK was sent from + */ +void +sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, + int length, struct sockaddr *init_addr, + uint16_t local_scope, uint16_t site_scope, + uint16_t ipv4_scope, uint16_t loopback_scope) +{ + /* process the local addresses in the initack */ + sctp_process_initack_addresses(stcb, m, offset, length); + + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* bound all case */ + sctp_check_address_list_all(stcb, m, offset, length, init_addr, + local_scope, site_scope, ipv4_scope, loopback_scope); + } else { + /* subset bound case */ + if (sctp_is_feature_on(stcb->sctp_ep, + SCTP_PCB_FLAGS_DO_ASCONF)) { + /* asconf's allowed */ + sctp_check_address_list_ep(stcb, m, offset, length, + init_addr); + } + /* else, no asconfs allowed, so what we sent is what we get */ + } +} + +/* + * sctp_bindx() support + */ +uint32_t +sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, + uint32_t type, uint32_t vrf_id) +{ + struct sctp_ifa *ifa; + struct sctp_laddr *laddr, *nladdr; + +#ifdef HAVE_SA_LEN + if (sa->sa_len == 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); + return (EINVAL); + } +#endif + if (type == SCTP_ADD_IP_ADDRESS) { + /* For an add the address MUST be on the system */ + ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); + } else if (type == SCTP_DEL_IP_ADDRESS) { + /* For a delete we need to find it in the inp */ + ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); + } else { + ifa = NULL; + } + if (ifa != NULL) { + if (type == SCTP_ADD_IP_ADDRESS) { + sctp_add_local_addr_ep(inp, ifa, type); + } else if (type == SCTP_DEL_IP_ADDRESS) { + if (inp->laddr_count < 2) { + /* can't delete the last local address */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); + return (EINVAL); + } + LIST_FOREACH(laddr, &inp->sctp_addr_list, + sctp_nxt_addr) { + if (ifa == laddr->ifa) { + /* Mark in the delete */ + laddr->action = type; + } + } + } + if (LIST_EMPTY(&inp->sctp_asoc_list)) { + /* + * There is no need to start the iterator if + * the inp has no associations. + */ + if (type == SCTP_DEL_IP_ADDRESS) { + LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { + if (laddr->ifa == ifa) { + sctp_del_local_addr_ep(inp, ifa); + } + } + } + } else { + struct sctp_asconf_iterator *asc; + struct sctp_laddr *wi; + int ret; + + SCTP_MALLOC(asc, struct sctp_asconf_iterator *, + sizeof(struct sctp_asconf_iterator), + SCTP_M_ASC_IT); + if (asc == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); + return (ENOMEM); + } + wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); + if (wi == NULL) { + SCTP_FREE(asc, SCTP_M_ASC_IT); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); + return (ENOMEM); + } + LIST_INIT(&asc->list_of_work); + asc->cnt = 1; + SCTP_INCR_LADDR_COUNT(); + wi->ifa = ifa; + wi->action = type; + atomic_add_int(&ifa->refcount, 1); + LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); + ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, + sctp_asconf_iterator_stcb, + sctp_asconf_iterator_ep_end, + SCTP_PCB_ANY_FLAGS, + SCTP_PCB_ANY_FEATURES, + SCTP_ASOC_ANY_STATE, + (void *)asc, 0, + sctp_asconf_iterator_end, inp, 0); + if (ret) { + SCTP_PRINTF("Failed to initiate iterator for addr_mgmt_ep_sa\n"); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EFAULT); + sctp_asconf_iterator_end(asc, 0); + return (EFAULT); + } + } + return (0); + } else { + /* invalid address! */ + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); + return (EADDRNOTAVAIL); + } +} + +void +sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + struct sctp_asconf_addr *aa_vtag, *aa_add, *aa_del; + struct sctp_ifa *sctp_ifap; + struct sctp_asconf_tag_param *vtag; +#ifdef INET + struct sockaddr_in *to; +#endif +#ifdef INET6 + struct sockaddr_in6 *to6; +#endif + + if (net == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); + return; + } + if (stcb == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); + return; + } + /* Need to have in the ASCONF: + * - VTAG(my_vtag/peer_vtag) + * - ADD(wildcard) + * - DEL(wildcard) + * - ADD(Any global addresses) + */ + SCTP_MALLOC(aa_vtag, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); + SCTP_MALLOC(aa_add, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); + SCTP_MALLOC(aa_del, struct sctp_asconf_addr *, sizeof(struct sctp_asconf_addr), SCTP_M_ASC_ADDR); + + if ((aa_vtag == NULL) || (aa_add == NULL) || (aa_del == NULL)) { + /* Didn't get memory */ + SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: failed to get memory!\n"); +out: + if (aa_vtag != NULL) { + SCTP_FREE(aa_vtag, SCTP_M_ASC_ADDR); + } + if (aa_add != NULL) { + SCTP_FREE(aa_add, SCTP_M_ASC_ADDR); + } + if (aa_del != NULL) { + SCTP_FREE(aa_del, SCTP_M_ASC_ADDR); + } + return; + } + memset(aa_vtag, 0, sizeof(struct sctp_asconf_addr)); + aa_vtag->special_del = 0; + /* Fill in ASCONF address parameter fields. */ + /* Top level elements are "networked" during send. */ + aa_vtag->ifa = NULL; + aa_vtag->sent = 0; /* clear sent flag */ + vtag = (struct sctp_asconf_tag_param *)&aa_vtag->ap.aph; + vtag->aph.ph.param_type = SCTP_NAT_VTAGS; + vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); + vtag->local_vtag = htonl(stcb->asoc.my_vtag); + vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); + + memset(aa_add, 0, sizeof(struct sctp_asconf_addr)); + memset(aa_del, 0, sizeof(struct sctp_asconf_addr)); + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; + aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); + aa_add->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; + aa_add->ap.addrp.ph.param_length = sizeof (struct sctp_ipv4addr_param); + /* No need to fill the address, we are using 0.0.0.0 */ + aa_del->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; + aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); + aa_del->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; + aa_del->ap.addrp.ph.param_length = sizeof (struct sctp_ipv4addr_param); + /* No need to fill the address, we are using 0.0.0.0 */ + break; +#endif +#ifdef INET6 + case AF_INET6: + aa_add->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; + aa_add->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); + aa_add->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; + aa_add->ap.addrp.ph.param_length = sizeof (struct sctp_ipv6addr_param); + /* No need to fill the address, we are using ::0 */ + aa_del->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; + aa_del->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); + aa_del->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; + aa_del->ap.addrp.ph.param_length = sizeof (struct sctp_ipv6addr_param); + /* No need to fill the address, we are using ::0 */ + break; +#endif + default: + SCTPDBG(SCTP_DEBUG_ASCONF1, + "sctp_asconf_send_nat_state_update: unknown address family %d\n", + net->ro._l_addr.sa.sa_family); + goto out; + } + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_vtag, next); + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_add, next); + TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa_del, next); + + /* Now we must hunt the addresses and add all global addresses */ + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + struct sctp_vrf *vrf = NULL; + struct sctp_ifn *sctp_ifnp; + uint32_t vrf_id; + + vrf_id = stcb->sctp_ep->def_vrf_id; + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + goto skip_rest; + } + + SCTP_IPI_ADDR_RLOCK(); + LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { + LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { + switch (sctp_ifap->address.sa.sa_family) { +#ifdef INET + case AF_INET: + to = &sctp_ifap->address.sin; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, + &to->sin_addr) != 0) { + continue; + } +#endif + if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { + continue; + } + if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { + continue; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + to6 = &sctp_ifap->address.sin6; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, + &to6->sin6_addr) != 0) { + continue; + } +#endif + if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { + continue; + } + if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { + continue; + } + break; +#endif + default: + continue; + } + sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); + } + } + SCTP_IPI_ADDR_RUNLOCK(); + } else { + struct sctp_laddr *laddr; + + LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + continue; + } + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) + /* Address being deleted by the system, dont + * list. + */ + continue; + if (laddr->action == SCTP_DEL_IP_ADDRESS) { + /* Address being deleted on this ep + * don't list. + */ + continue; + } + sctp_ifap = laddr->ifa; + switch (sctp_ifap->address.sa.sa_family) { +#ifdef INET + case AF_INET: + to = &sctp_ifap->address.sin; + if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { + continue; + } + if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { + continue; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + to6 = &sctp_ifap->address.sin6; + if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { + continue; + } + if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { + continue; + } + break; +#endif + default: + continue; + } + sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); + } + } + skip_rest: + /* Now we must send the asconf into the queue */ + sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); +} |