/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * a) Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * b) Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. * * c) Neither the name of Cisco Systems, Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef INET6 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) { struct mbuf *m; int iphlen; uint32_t vrf_id; uint8_t ecn_bits; struct sockaddr_in6 src, dst; struct ip6_hdr *ip6; struct sctphdr *sh; struct sctp_chunkhdr *ch; int length, offset; uint8_t compute_crc; uint32_t mflowid; uint8_t mflowtype; uint16_t fibnum; iphlen = *offp; if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { SCTP_RELEASE_PKT(*i_pak); return (IPPROTO_DONE); } m = SCTP_HEADER_TO_CHAIN(*i_pak); #ifdef SCTP_MBUF_LOGGING /* Log in any input mbufs */ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { sctp_log_mbc(m, SCTP_MBUF_INPUT); } #endif #ifdef SCTP_PACKET_LOGGING if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { sctp_packet_log(m); } #endif SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", m->m_pkthdr.len, if_name(m->m_pkthdr.rcvif), (int)m->m_pkthdr.csum_flags, CSUM_BITS); mflowid = m->m_pkthdr.flowid; mflowtype = M_HASHTYPE_GET(m); fibnum = M_GETFIB(m); SCTP_STAT_INCR(sctps_recvpackets); SCTP_STAT_INCR_COUNTER64(sctps_inpackets); /* Get IP, SCTP, and first chunk header together in the first mbuf. */ offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); if (m->m_len < offset) { m = m_pullup(m, offset); if (m == NULL) { SCTP_STAT_INCR(sctps_hdrops); return (IPPROTO_DONE); } } ip6 = mtod(m, struct ip6_hdr *); sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen); ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); offset -= sizeof(struct sctp_chunkhdr); memset(&src, 0, sizeof(struct sockaddr_in6)); src.sin6_family = AF_INET6; src.sin6_len = sizeof(struct sockaddr_in6); src.sin6_port = sh->src_port; src.sin6_addr = ip6->ip6_src; if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { goto out; } memset(&dst, 0, sizeof(struct sockaddr_in6)); dst.sin6_family = AF_INET6; dst.sin6_len = sizeof(struct sockaddr_in6); dst.sin6_port = sh->dest_port; dst.sin6_addr = ip6->ip6_dst; if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { goto out; } length = ntohs(ip6->ip6_plen) + iphlen; /* Validate mbuf chain length with IP payload length. */ if (SCTP_HEADER_LEN(m) != length) { SCTPDBG(SCTP_DEBUG_INPUT1, "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); SCTP_STAT_INCR(sctps_hdrops); goto out; } if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { goto out; } ecn_bits = IPV6_TRAFFIC_CLASS(ip6); if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { SCTP_STAT_INCR(sctps_recvhwcrc); compute_crc = 0; } else { SCTP_STAT_INCR(sctps_recvswcrc); compute_crc = 1; } sctp_common_input_processing(&m, iphlen, offset, length, (struct sockaddr *)&src, (struct sockaddr *)&dst, sh, ch, compute_crc, ecn_bits, mflowtype, mflowid, fibnum, vrf_id, port); out: if (m) { sctp_m_freem(m); } return (IPPROTO_DONE); } int sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) { return (sctp6_input_with_port(i_pak, offp, 0)); } void sctp6_notify(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint8_t icmp6_type, uint8_t icmp6_code, uint32_t next_mtu) { int timer_stopped; switch (icmp6_type) { case ICMP6_DST_UNREACH: if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { /* Mark the net unreachable. */ if (net->dest_state & SCTP_ADDR_REACHABLE) { /* Ok that destination is not reachable */ net->dest_state &= ~SCTP_ADDR_REACHABLE; net->dest_state &= ~SCTP_ADDR_PF; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); } } SCTP_TCB_UNLOCK(stcb); break; case ICMP6_PARAM_PROB: /* Treat it like an ABORT. */ if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED); (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); } else { SCTP_TCB_UNLOCK(stcb); } break; case ICMP6_PACKET_TOO_BIG: if (net->dest_state & SCTP_ADDR_NO_PMTUD) { SCTP_TCB_UNLOCK(stcb); break; } if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { timer_stopped = 1; sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); } else { timer_stopped = 0; } /* Update the path MTU. */ if (net->port) { next_mtu -= sizeof(struct udphdr); } if (net->mtu > next_mtu) { net->mtu = next_mtu; if (net->port) { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); } else { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); } } /* Update the association MTU */ if (stcb->asoc.smallest_mtu > next_mtu) { sctp_pathmtu_adjustment(stcb, next_mtu, true); } /* Finally, start the PMTU timer if it was running before. */ if (timer_stopped) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); } SCTP_TCB_UNLOCK(stcb); break; default: SCTP_TCB_UNLOCK(stcb); break; } } void sctp6_ctlinput(struct ip6ctlparam *ip6cp) { struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; struct sctphdr sh; struct sockaddr_in6 src, dst; if (icmp6_errmap(ip6cp->ip6c_icmp6) == 0) { return; } /* * Check if we can safely examine the ports and the verification tag * of the SCTP common header. */ if (ip6cp->ip6c_m->m_pkthdr.len < (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { return; } /* Copy out the port numbers and the verification tag. */ memset(&sh, 0, sizeof(sh)); m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), (caddr_t)&sh); memset(&src, 0, sizeof(struct sockaddr_in6)); src.sin6_family = AF_INET6; src.sin6_len = sizeof(struct sockaddr_in6); src.sin6_port = sh.src_port; src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { return; } memset(&dst, 0, sizeof(struct sockaddr_in6)); dst.sin6_family = AF_INET6; dst.sin6_len = sizeof(struct sockaddr_in6); dst.sin6_port = sh.dest_port; dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { return; } inp = NULL; net = NULL; stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, (struct sockaddr *)&src, &inp, &net, 1, SCTP_DEFAULT_VRFID); if ((stcb != NULL) && (net != NULL) && (inp != NULL)) { /* Check the verification tag */ if (ntohl(sh.v_tag) != 0) { /* * This must be the verification tag used for * sending out packets. We don't consider packets * reflecting the verification tag. */ if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { SCTP_TCB_UNLOCK(stcb); return; } } else { if (ip6cp->ip6c_m->m_pkthdr.len >= ip6cp->ip6c_off + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr) + offsetof(struct sctp_init, a_rwnd)) { /* * In this case we can check if we got an * INIT chunk and if the initiate tag * matches. */ uint32_t initiate_tag; uint8_t chunk_type; m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off + sizeof(struct sctphdr), sizeof(uint8_t), (caddr_t)&chunk_type); m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr), sizeof(uint32_t), (caddr_t)&initiate_tag); if ((chunk_type != SCTP_INITIATION) || (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { SCTP_TCB_UNLOCK(stcb); return; } } else { SCTP_TCB_UNLOCK(stcb); return; } } sctp6_notify(inp, stcb, net, ip6cp->ip6c_icmp6->icmp6_type, ip6cp->ip6c_icmp6->icmp6_code, ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); } else { if ((stcb == NULL) && (inp != NULL)) { /* reduce inp's ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } if (stcb) { SCTP_TCB_UNLOCK(stcb); } } } /* * this routine can probably be collasped into the one in sctp_userreq.c * since they do the same thing and now we lookup with a sockaddr */ static int sctp6_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in6 addrs[2]; struct sctp_inpcb *inp; struct sctp_nets *net; struct sctp_tcb *stcb; int error; uint32_t vrf_id; vrf_id = SCTP_DEFAULT_VRFID; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); if (req->newlen != sizeof(addrs)) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (req->oldlen != sizeof(struct ucred)) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), sin6tosa(&addrs[0]), &inp, &net, 1, vrf_id); if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { if ((inp != NULL) && (stcb == NULL)) { /* reduce ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); goto cred_can_cont; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); error = ENOENT; goto out; } SCTP_TCB_UNLOCK(stcb); /* * We use the write lock here, only since in the error leg we need * it. If we used RLOCK, then we would have to * wlock/decr/unlock/rlock. Which in theory could create a hole. * Better to use higher wlock. */ SCTP_INP_WLOCK(inp); cred_can_cont: error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); if (error) { SCTP_INP_WUNLOCK(inp); goto out; } cru2x(inp->sctp_socket->so_cred, &xuc); SCTP_INP_WUNLOCK(inp); error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); out: return (error); } SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0, sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); static int sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) { int error; struct sctp_inpcb *inp; uint32_t vrf_id = SCTP_DEFAULT_VRFID; inp = (struct sctp_inpcb *)so->so_pcb; if (inp != NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); if (error) return (error); } error = sctp_inpcb_alloc(so, vrf_id); if (error) return (error); inp = (struct sctp_inpcb *)so->so_pcb; SCTP_INP_WLOCK(inp); inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ inp->ip_inp.inp.inp_vflag |= INP_IPV6; inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ #ifdef INET /* * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 * socket as well, because the socket may be bound to an IPv6 * wildcard address, which may match an IPv4-mapped IPv6 address. */ inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); #endif SCTP_INP_WUNLOCK(inp); return (0); } static int sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) { struct sctp_inpcb *inp; int error; u_char vflagsav; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (addr) { switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } vflagsav = inp->ip_inp.inp.inp_vflag; inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; inp->ip_inp.inp.inp_vflag |= INP_IPV6; if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { switch (addr->sa_family) { #ifdef INET case AF_INET: /* binding v4 addr to v6 socket, so reset flags */ inp->ip_inp.inp.inp_vflag |= INP_IPV4; inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; break; #endif #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6_p; sin6_p = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { inp->ip_inp.inp.inp_vflag |= INP_IPV4; } #ifdef INET if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { struct sockaddr_in sin; in6_sin6_2_sin(&sin, sin6_p); inp->ip_inp.inp.inp_vflag |= INP_IPV4; inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); goto out; } #endif break; } #endif default: break; } } else if (addr != NULL) { struct sockaddr_in6 *sin6_p; /* IPV6_V6ONLY socket */ #ifdef INET if (addr->sa_family == AF_INET) { /* can't bind v4 addr to v6 only socket! */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); error = EINVAL; goto out; } #endif sin6_p = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { /* can't bind v4-mapped addrs either! */ /* NOTE: we don't support SIIT */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); error = EINVAL; goto out; } } error = sctp_inpcb_bind(so, addr, NULL, p); out: if (error != 0) inp->ip_inp.inp.inp_vflag = vflagsav; return (error); } static void sctp6_close(struct socket *so) { sctp_close(so); } /* This could be made common with sctp_detach() since they are identical */ int sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p); static int sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p) { struct sctp_inpcb *inp; #ifdef INET struct sockaddr_in6 *sin6; #endif /* INET */ /* No SPL needed since sctp_output does this */ inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* * For the TCP model we may get a NULL addr, if we are a connected * socket thats ok. */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && (addr == NULL)) { goto connected_type; } if (addr == NULL) { SCTP_RELEASE_PKT(m); if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); return (EDESTADDRREQ); } switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } #ifdef INET sin6 = (struct sockaddr_in6 *)addr; if (SCTP_IPV6_V6ONLY(inp)) { /* * if IPV6_V6ONLY flag, we discard datagrams destined to a * v4 addr or v4-mapped addr */ if (addr->sa_family == AF_INET) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } if ((addr->sa_family == AF_INET6) && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { struct sockaddr_in sin; /* convert v4-mapped into v4 addr and send */ in6_sin6_2_sin(&sin, sin6); return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); } #endif /* INET */ connected_type: /* now what about control */ if (control) { if (inp->control) { SCTP_PRINTF("huh? control set?\n"); SCTP_RELEASE_PKT(inp->control); inp->control = NULL; } inp->control = control; } /* Place the data */ if (inp->pkt) { SCTP_BUF_NEXT(inp->pkt_last) = m; inp->pkt_last = m; } else { inp->pkt_last = inp->pkt = m; } if ( /* FreeBSD and MacOSX uses a flag passed */ ((flags & PRUS_MORETOCOME) == 0) ) { /* * note with the current version this code will only be used * by OpenBSD, NetBSD and FreeBSD have methods for * re-defining sosend() to use sctp_sosend(). One can * optionaly switch back to this code (by changing back the * defininitions but this is not advisable. */ struct epoch_tracker et; int ret; NET_EPOCH_ENTER(et); ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); NET_EPOCH_EXIT(et); inp->pkt = NULL; inp->control = NULL; return (ret); } else { return (0); } } static int sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) { struct epoch_tracker et; uint32_t vrf_id; int error = 0; struct sctp_inpcb *inp; struct sctp_tcb *stcb; #ifdef INET struct sockaddr_in6 *sin6; union sctp_sockstore store; #endif inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); /* I made the same as TCP since we are * not setup? */ } if (addr == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } vrf_id = inp->def_vrf_id; SCTP_ASOC_CREATE_LOCK(inp); SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == SCTP_PCB_FLAGS_UNBOUND) { /* Bind a ephemeral port */ SCTP_INP_RUNLOCK(inp); error = sctp6_bind(so, NULL, p); if (error) { SCTP_ASOC_CREATE_UNLOCK(inp); return (error); } SCTP_INP_RLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { /* We are already connected AND the TCP model */ SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); return (EADDRINUSE); } #ifdef INET sin6 = (struct sockaddr_in6 *)addr; if (SCTP_IPV6_V6ONLY(inp)) { /* * if IPV6_V6ONLY flag, ignore connections destined to a v4 * addr or v4-mapped addr */ if (addr->sa_family == AF_INET) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } if ((addr->sa_family == AF_INET6) && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* convert v4-mapped into v4 addr */ in6_sin6_2_sin(&store.sin, sin6); addr = &store.sa; } #endif /* INET */ /* Now do we connect? */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); } else { SCTP_INP_RUNLOCK(inp); SCTP_INP_WLOCK(inp); SCTP_INP_INCR_REF(inp); SCTP_INP_WUNLOCK(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); if (stcb == NULL) { SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } } if (stcb != NULL) { /* Already have or am bring up an association */ SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); return (EALREADY); } /* We are GOOD to go */ stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, inp->sctp_ep.port, p, SCTP_INITIALIZE_AUTH_PARAMS); SCTP_ASOC_CREATE_UNLOCK(inp); if (stcb == NULL) { /* Gak! no memory */ return (error); } SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); NET_EPOCH_ENTER(et); sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); SCTP_TCB_UNLOCK(stcb); NET_EPOCH_EXIT(et); return (error); } static int sctp6_getaddr(struct socket *so, struct sockaddr *sa) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; struct sctp_inpcb *inp; uint32_t vrf_id; struct sctp_ifa *sctp_ifa; int error; *sin6 = (struct sockaddr_in6 ){ .sin6_len = sizeof(struct sockaddr_in6), .sin6_family = AF_INET6, }; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); } SCTP_INP_RLOCK(inp); sin6->sin6_port = inp->sctp_lport; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* For the bound all case you get back 0 */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { struct sctp_tcb *stcb; struct sockaddr_in6 *sin_a6; struct sctp_nets *net; int fnd; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } fnd = 0; sin_a6 = NULL; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; if (sin_a6 == NULL) /* this will make coverity happy */ continue; if (sin_a6->sin6_family == AF_INET6) { fnd = 1; break; } } if ((!fnd) || (sin_a6 == NULL)) { /* punt */ SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } vrf_id = inp->def_vrf_id; sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); if (sctp_ifa) { sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; } } else { /* For the bound all case you get back 0 */ memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); } } else { /* Take the first IPv6 address in the list */ struct sctp_laddr *laddr; int fnd = 0; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa->address.sa.sa_family == AF_INET6) { struct sockaddr_in6 *sin_a; sin_a = &laddr->ifa->address.sin6; sin6->sin6_addr = sin_a->sin6_addr; fnd = 1; break; } } if (!fnd) { SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } } SCTP_INP_RUNLOCK(inp); /* Scoping things for v6 */ if ((error = sa6_recoverscope(sin6)) != 0) { return (error); } return (0); } static int sctp6_peeraddr(struct socket *so, struct sockaddr *sa) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; int fnd; struct sockaddr_in6 *sin_a6; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; int error; *sin6 = (struct sockaddr_in6 ){ .sin6_len = sizeof(struct sockaddr_in6), .sin6_family = AF_INET6, }; inp = (struct sctp_inpcb *)so->so_pcb; if ((inp == NULL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { /* UDP type and listeners will drop out here */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); return (ENOTCONN); } SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); } fnd = 0; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; if (sin_a6->sin6_family == AF_INET6) { fnd = 1; sin6->sin6_port = stcb->rport; sin6->sin6_addr = sin_a6->sin6_addr; break; } } SCTP_TCB_UNLOCK(stcb); if (!fnd) { /* No IPv4 address */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } if ((error = sa6_recoverscope(sin6)) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); return (error); } return (0); } static int sctp6_in6getaddr(struct socket *so, struct sockaddr *sa) { struct inpcb *inp = sotoinpcb(so); int error; if (inp == NULL) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* allow v6 addresses precedence */ error = sctp6_getaddr(so, sa); #ifdef INET if (error) { struct sockaddr_in sin; /* try v4 next if v6 failed */ error = sctp_ingetaddr(so, (struct sockaddr *)&sin); if (error) return (error); in6_sin_2_v4mapsin6(&sin, (struct sockaddr_in6 *)sa); } #endif return (error); } static int sctp6_getpeeraddr(struct socket *so, struct sockaddr *sa) { struct inpcb *inp = sotoinpcb(so); int error; if (inp == NULL) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* allow v6 addresses precedence */ error = sctp6_peeraddr(so, sa); #ifdef INET if (error) { struct sockaddr_in sin; /* try v4 next if v6 failed */ error = sctp_peeraddr(so, (struct sockaddr *)&sin); if (error) return (error); in6_sin_2_v4mapsin6(&sin, (struct sockaddr_in6 *)sa); } #endif return (error); } #define SCTP6_PROTOSW \ .pr_protocol = IPPROTO_SCTP, \ .pr_ctloutput = sctp_ctloutput, \ .pr_abort = sctp_abort, \ .pr_accept = sctp_accept, \ .pr_attach = sctp6_attach, \ .pr_bind = sctp6_bind, \ .pr_connect = sctp6_connect, \ .pr_control = in6_control, \ .pr_close = sctp6_close, \ .pr_detach = sctp6_close, \ .pr_sopoll = sopoll_generic, \ .pr_flush = sctp_flush, \ .pr_disconnect = sctp_disconnect, \ .pr_listen = sctp_listen, \ .pr_peeraddr = sctp6_getpeeraddr, \ .pr_send = sctp6_send, \ .pr_shutdown = sctp_shutdown, \ .pr_sockaddr = sctp6_in6getaddr, \ .pr_sosend = sctp_sosend, \ .pr_soreceive = sctp_soreceive struct protosw sctp6_seqpacket_protosw = { .pr_type = SOCK_SEQPACKET, .pr_flags = PR_WANTRCVD, SCTP6_PROTOSW }; struct protosw sctp6_stream_protosw = { .pr_type = SOCK_STREAM, .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, SCTP6_PROTOSW }; #endif