/* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */ /* $NetBSD: sctp6_usrreq.c,v 1.22 2020/04/27 19:33:48 rjs Exp $ */ /* * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Cisco Systems, Inc. * 4. Neither the name of the project 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 CISCO SYSTEMS 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 CISCO SYSTEMS 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 __KERNEL_RCSID(0, "$NetBSD: sctp6_usrreq.c,v 1.22 2020/04/27 19:33:48 rjs Exp $"); #ifdef _KERNEL_OPT #include "opt_inet.h" #include "opt_ipsec.h" #include "opt_sctp.h" #include "opt_net_mpsafe.h" #endif /* _KERNEL_OPT */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IPSEC #include #include #endif /*IPSEC*/ #if defined(NFAITH) && NFAITH > 0 #include #endif #if defined(HAVE_NRL_INPCB) || defined(__FreeBSD__) #ifndef in6pcb #define in6pcb inpcb #endif #ifndef sotoin6pcb #define sotoin6pcb sotoinpcb #endif #endif #ifdef SCTP_DEBUG extern u_int32_t sctp_debug_on; #endif static int sctp6_detach(struct socket *so); extern int sctp_no_csum_on_loopback; int sctp6_input(struct mbuf **mp, int *offp, int proto) { struct mbuf *m = *mp; struct ip6_hdr *ip6; struct sctphdr *sh; struct sctp_inpcb *in6p = NULL; struct sctp_nets *net; int refcount_up = 0; u_int32_t check, calc_check; struct inpcb *in6p_ip; struct sctp_chunkhdr *ch; struct mbuf *opts = NULL; int length, mlen, offset, iphlen; u_int8_t ecn_bits; struct sctp_tcb *stcb = NULL; int off = *offp; int s; ip6 = mtod(m, struct ip6_hdr *); /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch)); if (sh == NULL) { sctp_pegs[SCTP_HDR_DROPS]++; return IPPROTO_DONE; } ch = (struct sctp_chunkhdr *)((vaddr_t)sh + sizeof(struct sctphdr)); iphlen = off; offset = iphlen + sizeof(*sh) + sizeof(*ch); #if defined(NFAITH) && NFAITH > 0 if (faithprefix(&ip6->ip6_dst)) goto bad; #endif /* NFAITH defined and > 0 */ sctp_pegs[SCTP_INPKTS]++; #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT1) { printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, m->m_pkthdr.len); } #endif if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { /* No multi-cast support in SCTP */ sctp_pegs[SCTP_IN_MCAST]++; goto bad; } /* destination port of 0 is illegal, based on RFC2960. */ if (sh->dest_port == 0) goto bad; if ((sctp_no_csum_on_loopback == 0) || (m_get_rcvif_NOMPSAFE(m) == NULL) || (m_get_rcvif_NOMPSAFE(m)->if_type != IFT_LOOP)) { /* we do NOT validate things from the loopback if the * sysctl is set to 1. */ check = sh->checksum; /* save incoming checksum */ if ((check == 0) && (sctp_no_csum_on_loopback)) { /* special hook for where we got a local address * somehow routed across a non IFT_LOOP type interface */ if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) goto sctp_skip_csum; } sh->checksum = 0; /* prepare for calc */ calc_check = sctp_calculate_sum(m, &mlen, iphlen); if (calc_check != check) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT1) { printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", calc_check, check, m, mlen, iphlen); } #endif stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), sh, ch, &in6p, &net); /* in6p's ref-count increased && stcb locked */ if ((in6p) && (stcb)) { sctp_send_packet_dropped(stcb, net, m, iphlen, 1); sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); } else if ((in6p != NULL) && (stcb == NULL)) { refcount_up = 1; } sctp_pegs[SCTP_BAD_CSUM]++; goto bad; } sh->checksum = calc_check; } else { sctp_skip_csum: mlen = m->m_pkthdr.len; } net = NULL; /* * Locate pcb and tcb for datagram * sctp_findassociation_addr() wants IP/SCTP/first chunk header... */ #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT1) { printf("V6 Find the association\n"); } #endif stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), sh, ch, &in6p, &net); /* in6p's ref-count increased */ if (in6p == NULL) { struct sctp_init_chunk *init_chk, chunk_buf; sctp_pegs[SCTP_NOPORTS]++; if (ch->chunk_type == SCTP_INITIATION) { /* we do a trick here to get the INIT tag, * dig in and get the tag from the INIT and * put it in the common header. */ init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, iphlen + sizeof(*sh), sizeof(*init_chk), (u_int8_t *)&chunk_buf); sh->v_tag = init_chk->init.initiate_tag; } sctp_send_abort(m, iphlen, sh, 0, NULL); goto bad; } else if (stcb == NULL) { refcount_up = 1; } in6p_ip = (struct inpcb *)in6p; #ifdef IPSEC /* * Check AH/ESP integrity. */ if (ipsec_used && ipsec_in_reject(m, (struct in6pcb *)in6p_ip)) { /* XXX */ #if 0 /* FIX ME: need to find right stat */ ipsec6stat.in_polvio++; #endif goto bad; } #endif /*IPSEC*/ /* * Construct sockaddr format source address. * Stuff source address and datagram in user buffer. */ if ((in6p->ip_inp.inp.inp_flags & INP_CONTROLOPTS) #ifndef __OpenBSD__ || (in6p->sctp_socket->so_options & SO_TIMESTAMP) #endif ) { #if defined(__FreeBSD__) || defined(__APPLE__) #if (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version < 501113) || defined(__APPLE__) ip6_savecontrol(in6p_ip, &opts, ip6, m); #elif __FreeBSD_version >= 440000 || (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version >= 501113) ip6_savecontrol(in6p_ip, m, &opts); #else ip6_savecontrol(in6p_ip, m, &opts, NULL); #endif #elif defined(__NetBSD__) ip6_savecontrol((struct in6pcb *)in6p_ip, &opts, ip6, m); #else ip6_savecontrol((struct in6pcb *)in6p_ip, m, &opts); #endif } /* * CONTROL chunk processing */ length = ntohs(ip6->ip6_plen) + iphlen; offset -= sizeof(*ch); ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); s = splsoftnet(); (void)sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, in6p, stcb, net, ecn_bits); /* inp's ref-count reduced && stcb unlocked */ splx(s); /* XXX this stuff below gets moved to appropriate parts later... */ if (m) m_freem(m); if (opts) m_freem(opts); if ((in6p) && refcount_up){ /* reduce ref-count */ SCTP_INP_WLOCK(in6p); SCTP_INP_DECR_REF(in6p); SCTP_INP_WUNLOCK(in6p); } return IPPROTO_DONE; bad: if (stcb) { SCTP_TCB_UNLOCK(stcb); } if ((in6p) && refcount_up){ /* reduce ref-count */ SCTP_INP_WLOCK(in6p); SCTP_INP_DECR_REF(in6p); SCTP_INP_WUNLOCK(in6p); } if (m) { m_freem(m); } if (opts) { m_freem(opts); } return IPPROTO_DONE; } static void sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) { unsigned int nxtsz; if ((inp == NULL) || (stcb == NULL) || (net == NULL) || (icmp6 == NULL) || (sh == NULL)) { goto out; } /* First do we even look at it? */ if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) goto out; if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { /* not PACKET TO BIG */ goto out; } /* * ok we need to look closely. We could even get smarter and * look at anyone that we sent to in case we get a different * ICMP that tells us there is no way to reach a host, but for * this impl, all we care about is MTU discovery. */ nxtsz = ntohl(icmp6->icmp6_mtu); /* Stop any PMTU timer */ sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); /* Adjust destination size limit */ if (net->mtu > nxtsz) { net->mtu = nxtsz; } /* now what about the ep? */ if (stcb->asoc.smallest_mtu > nxtsz) { struct sctp_tmit_chunk *chk; struct sctp_stream_out *strm; /* Adjust that too */ stcb->asoc.smallest_mtu = nxtsz; /* now off to subtract IP_DF flag if needed */ TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { if ((chk->send_size+IP_HDR_SIZE) > nxtsz) { chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; } } TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { if ((chk->send_size+IP_HDR_SIZE) > nxtsz) { /* * For this guy we also mark for immediate * resend since we sent to big of chunk */ chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; if (chk->sent != SCTP_DATAGRAM_RESEND) stcb->asoc.sent_queue_retran_cnt++; chk->sent = SCTP_DATAGRAM_RESEND; chk->rec.data.doing_fast_retransmit = 0; chk->sent = SCTP_DATAGRAM_RESEND; /* Clear any time so NO RTT is being done */ chk->sent_rcv_time.tv_sec = 0; chk->sent_rcv_time.tv_usec = 0; stcb->asoc.total_flight -= chk->send_size; net->flight_size -= chk->send_size; } } TAILQ_FOREACH(strm, &stcb->asoc.out_wheel, next_spoke) { TAILQ_FOREACH(chk, &strm->outqueue, sctp_next) { if ((chk->send_size+IP_HDR_SIZE) > nxtsz) { chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; } } } } sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); out: if (inp) { /* reduce inp's ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } if (stcb) { SCTP_TCB_UNLOCK(stcb); } } void * sctp6_ctlinput(int cmd, const struct sockaddr *pktdst, void *d) { struct sctphdr sh; struct ip6ctlparam *ip6cp = NULL; int s, cm; if (pktdst->sa_family != AF_INET6 || pktdst->sa_len != sizeof(struct sockaddr_in6)) return NULL; if ((unsigned)cmd >= PRC_NCMDS) return NULL; if (PRC_IS_REDIRECT(cmd)) { d = NULL; } else if (inet6ctlerrmap[cmd] == 0) { return NULL; } /* if the parameter is from icmp6, decode it. */ if (d != NULL) { ip6cp = (struct ip6ctlparam *)d; } else { ip6cp = (struct ip6ctlparam *)NULL; } if (ip6cp) { /* * XXX: We assume that when IPV6 is non NULL, * M and OFF are valid. */ /* check if we can safely examine src and dst ports */ struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; struct sockaddr_in6 final; if (ip6cp->ip6c_m == NULL || (size_t)ip6cp->ip6c_m->m_pkthdr.len < (ip6cp->ip6c_off + sizeof(sh))) return NULL; memset(&sh, 0, sizeof(sh)); memset(&final, 0, sizeof(final)); inp = NULL; net = NULL; m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), (void *)&sh); ip6cp->ip6c_src->sin6_port = sh.src_port; final.sin6_len = sizeof(final); final.sin6_family = AF_INET6; final.sin6_addr = ((const struct sockaddr_in6 *)pktdst)->sin6_addr; final.sin6_port = sh.dest_port; s = splsoftnet(); stcb = sctp_findassociation_addr_sa(sin6tosa(ip6cp->ip6c_src), sin6tosa(&final), &inp, &net, 1); /* inp's ref-count increased && stcb locked */ if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { if (cmd == PRC_MSGSIZE) { sctp6_notify_mbuf(inp, ip6cp->ip6c_icmp6, &sh, stcb, net); /* inp's ref-count reduced && stcb unlocked */ } else { if (cmd == PRC_HOSTDEAD) { cm = EHOSTUNREACH; } else { cm = inet6ctlerrmap[cmd]; } sctp_notify(inp, cm, &sh, sin6tosa(&final), stcb, net); /* inp's ref-count reduced && stcb unlocked */ } } else { if (PRC_IS_REDIRECT(cmd) && inp) { in6_rtchange((struct in6pcb *)inp, inet6ctlerrmap[cmd]); } if (inp) { /* reduce inp's ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } if (stcb) { SCTP_TCB_UNLOCK(stcb); } } splx(s); } return NULL; } /* * 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 */ #ifdef __FreeBSD__ static int sctp6_getcred(SYSCTL_HANDLER_ARGS) { struct sockaddr_in6 addrs[2]; struct sctp_inpcb *inp; struct sctp_nets *net; struct sctp_tcb *stcb; int error, s; #if defined(__FreeBSD__) && __FreeBSD_version >= 500000 error = suser(req->td); #else error = suser(req->p); #endif if (error) return (error); if (req->newlen != sizeof(addrs)) return (EINVAL); if (req->oldlen != sizeof(struct ucred)) return (EINVAL); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); s = splsoftnet(); stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), sin6tosa(&addrs[1]), &inp, &net, 1); if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { error = ENOENT; if (inp) { SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } goto out; } error = SYSCTL_OUT(req, inp->sctp_socket->so_cred, sizeof(struct ucred)); SCTP_TCB_UNLOCK (stcb); out: splx(s); return (error); } SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0, 0, sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); #endif /* This is the same as the sctp_abort() could be made common */ static int sctp6_abort(struct socket *so) { int s; struct sctp_inpcb *inp; KASSERT(solocked(so)); s = splsoftnet(); inp = (struct sctp_inpcb *)so->so_pcb; if (inp == 0) return EINVAL; /* ??? possible? panic instead? */ soisdisconnected(so); sctp_inpcb_free(inp, 1); splx(s); return 0; } static int sctp6_attach(struct socket *so, int proto) { struct in6pcb *inp6; int error; struct sctp_inpcb *inp; sosetlock(so); inp = (struct sctp_inpcb *)so->so_pcb; if (inp != NULL) return EINVAL; if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { error = soreserve(so, sctp_sendspace, sctp_recvspace); if (error) return error; } error = sctp_inpcb_alloc(so); if (error) return error; inp = (struct sctp_inpcb *)so->so_pcb; inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ inp6 = (struct in6pcb *)inp; inp->inp_vflag |= INP_IPV6; if (ip6_v6only) { inp6->in6p_flags |= IN6P_IPV6_V6ONLY; } so->so_send = sctp_sosend; #ifdef IPSEC inp6->in6p_af = proto; #endif inp6->in6p_hops = -1; /* use kernel default */ inp6->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->inp_ip_ttl = ip_defttl; #endif /* * Hmm what about the IPSEC stuff that is missing here but * in sctp_attach()? */ return 0; } static int sctp6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) { struct sctp_inpcb *inp; struct in6pcb *inp6; int error; KASSERT(solocked(so)); inp = (struct sctp_inpcb *)so->so_pcb; if (inp == 0) return EINVAL; inp6 = (struct in6pcb *)inp; inp->inp_vflag &= ~INP_IPV4; inp->inp_vflag |= INP_IPV6; if (nam != NULL && (inp6->in6p_flags & IN6P_IPV6_V6ONLY) == 0) { if (nam->sa_family == AF_INET) { /* binding v4 addr to v6 socket, so reset flags */ inp->inp_vflag |= INP_IPV4; inp->inp_vflag &= ~INP_IPV6; } else { struct sockaddr_in6 *sin6_p; sin6_p = (struct sockaddr_in6 *)nam; if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { inp->inp_vflag |= INP_IPV4; } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { struct sockaddr_in sin; in6_sin6_2_sin(&sin, sin6_p); inp->inp_vflag |= INP_IPV4; inp->inp_vflag &= ~INP_IPV6; error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, l); return error; } } } else if (nam != NULL) { /* IPV6_V6ONLY socket */ if (nam->sa_family == AF_INET) { /* can't bind v4 addr to v6 only socket! */ return EINVAL; } else { struct sockaddr_in6 *sin6_p; sin6_p = (struct sockaddr_in6 *)nam; if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) /* can't bind v4-mapped addrs either! */ /* NOTE: we don't support SIIT */ return EINVAL; } } error = sctp_inpcb_bind(so, nam, l); return error; } /*This could be made common with sctp_detach() since they are identical */ static int sctp6_detach(struct socket *so) { struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == 0) return EINVAL; if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || (so->so_rcv.sb_cc > 0)) sctp_inpcb_free(inp, 1); else sctp_inpcb_free(inp, 0); return 0; } static int sctp6_disconnect(struct socket *so) { struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { return (ENOTCONN); } if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { if (LIST_EMPTY(&inp->sctp_asoc_list)) { /* No connection */ return (ENOTCONN); } else { int some_on_streamwheel = 0; struct sctp_association *asoc; struct sctp_tcb *stcb; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { return (EINVAL); } asoc = &stcb->asoc; if (!TAILQ_EMPTY(&asoc->out_wheel)) { /* Check to see if some data queued */ struct sctp_stream_out *outs; TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { if (!TAILQ_EMPTY(&outs->outqueue)) { some_on_streamwheel = 1; break; } } } if (TAILQ_EMPTY(&asoc->send_queue) && TAILQ_EMPTY(&asoc->sent_queue) && (some_on_streamwheel == 0)) { /* nothing queued to send, so I'm done... */ if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { /* only send SHUTDOWN the first time */ #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { printf("%s:%d sends a shutdown\n", __FILE__, __LINE__ ); } #endif sctp_send_shutdown(stcb, stcb->asoc.primary_destination); sctp_chunk_output(stcb->sctp_ep, stcb, 1); asoc->state = SCTP_STATE_SHUTDOWN_SENT; sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, asoc->primary_destination); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, asoc->primary_destination); } } else { /* * we still got (or just got) data to send, * so set SHUTDOWN_PENDING */ /* * XXX sockets draft says that MSG_EOF should * be sent with no data. currently, we will * allow user data to be sent first and move * to SHUTDOWN-PENDING */ asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; } return (0); } } else { /* UDP model does not support this */ return EOPNOTSUPP; } } static int sctp6_recvoob(struct socket *so, struct mbuf *m, int flags) { KASSERT(solocked(so)); return EOPNOTSUPP; } static int sctp6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, struct mbuf *control, struct lwp *l) { struct sctp_inpcb *inp; struct in6pcb *inp6; #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) { m_freem(control); control = NULL; } m_freem(m); return EINVAL; } inp6 = (struct in6pcb *)inp; /* 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) && (nam == NULL)) { goto connected_type; } if (nam == NULL) { m_freem(m); if (control) { m_freem(control); control = NULL; } return (EDESTADDRREQ); } #ifdef INET sin6 = (struct sockaddr_in6 *)nam; /* * XXX XXX XXX Check sin6->sin6_len? */ if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) { /* * if IPV6_V6ONLY flag, we discard datagrams * destined to a v4 addr or v4-mapped addr */ if (nam->sa_family == AF_INET) { return EINVAL; } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { return EINVAL; } } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { if (!ip6_v6only) { struct sockaddr_in sin; /* convert v4-mapped into v4 addr and send */ in6_sin6_2_sin(&sin, sin6); return sctp_send(so, m, (struct sockaddr *)&sin, control, l); } else { /* mapped addresses aren't enabled */ return EINVAL; } } #endif /* INET */ connected_type: /* now what about control */ if (control) { if (inp->control) { printf("huh? control set?\n"); m_freem(inp->control); inp->control = NULL; } inp->control = control; } /* add it in possibly */ if ((inp->pkt) && (inp->pkt->m_flags & M_PKTHDR)) { struct mbuf *x; int c_len; c_len = 0; /* How big is it */ for (x=m;x;x = x->m_next) { c_len += x->m_len; } inp->pkt->m_pkthdr.len += c_len; } /* Place the data */ if (inp->pkt) { inp->pkt_last->m_next = m; inp->pkt_last = m; } else { inp->pkt_last = inp->pkt = m; } if ((so->so_state & SS_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. */ int ret; ret = sctp_output(inp, inp->pkt , nam, inp->control, l, 0); inp->pkt = NULL; inp->control = NULL; return (ret); } else { return (0); } } static int sctp6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) { KASSERT(solocked(so)); m_freem(m); m_freem(control); return EOPNOTSUPP; } static int sctp6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) { int error = 0; struct sctp_inpcb *inp; struct in6pcb *inp6; struct sctp_tcb *stcb; #ifdef INET struct sockaddr_in6 *sin6; struct sockaddr_storage ss; #endif /* INET */ inp6 = (struct in6pcb *)so->so_pcb; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == 0) { return (ECONNRESET); /* I made the same as TCP since * we are not setup? */ } 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, l); 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); return (EADDRINUSE); } #ifdef INET sin6 = (struct sockaddr_in6 *)nam; /* * XXX XXX XXX Check sin6->sin6_len? */ if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) { /* * if IPV6_V6ONLY flag, ignore connections * destined to a v4 addr or v4-mapped addr */ if (nam->sa_family == AF_INET) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); return EINVAL; } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); return EINVAL; } } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { if (!ip6_v6only) { /* convert v4-mapped into v4 addr */ in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); nam = (struct sockaddr *)&ss; } else { /* mapped addresses aren't enabled */ SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); return EINVAL; } } #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_UNLOCK (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, nam, 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); return (EALREADY); } /* We are GOOD to go */ stcb = sctp_aloc_assoc(inp, nam, 1, &error, 0); SCTP_ASOC_CREATE_UNLOCK(inp); if (stcb == NULL) { /* Gak! no memory */ return (error); } if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; /* Set the connected flag so we can queue data */ soisconnecting(so); } stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); sctp_send_initiate(inp, stcb); SCTP_TCB_UNLOCK (stcb); return error; } static int sctp6_connect2(struct socket *so, struct socket *so2) { KASSERT(solocked(so)); return EOPNOTSUPP; } static int sctp6_getaddr(struct socket *so, struct sockaddr *nam) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; struct sctp_inpcb *inp; int error; /* * Do the malloc first in case it blocks. */ memset(sin6, 0, sizeof(*sin6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { return ECONNRESET; } 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; const struct sockaddr_in6 *sin_a6; struct sctp_nets *net; int fnd; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { goto notConn6; } fnd = 0; sin_a6 = NULL; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro); if (sin_a6->sin6_family == AF_INET6) { fnd = 1; break; } } if ((!fnd) || (sin_a6 == NULL)) { /* punt */ goto notConn6; } sin6->sin6_addr = sctp_ipv6_source_address_selection( inp, stcb, &net->ro, net, 0); } else { /* For the bound all case you get back 0 */ notConn6: 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->ifa_addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin_a; sin_a = (struct sockaddr_in6 *)laddr->ifa->ifa_addr; sin6->sin6_addr = sin_a->sin6_addr; fnd = 1; break; } } if (!fnd) { return ENOENT; } } /* Scoping things for v6 */ if ((error = sa6_recoverscope(sin6)) != 0) return (error); return (0); } static int sctp6_peeraddr(struct socket *so, struct sockaddr *nam) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; int fnd, error; const struct sockaddr_in6 *sin_a6; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; /* * Do the malloc first in case it blocks. */ inp = (struct sctp_inpcb *)so->so_pcb; if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { /* UDP type and listeners will drop out here */ return (ENOTCONN); } memset(sin6, 0, sizeof(*sin6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); /* We must recapture incase we blocked */ inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { return ECONNRESET; } stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { return ECONNRESET; } fnd = 0; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro); if (sin_a6->sin6_family == AF_INET6) { fnd = 1; sin6->sin6_port = stcb->rport; sin6->sin6_addr = sin_a6->sin6_addr; break; } } if (!fnd) { /* No IPv4 address */ return ENOENT; } if ((error = sa6_recoverscope(sin6)) != 0) return (error); return (0); } static int sctp6_sockaddr(struct socket *so, struct sockaddr *nam) { struct in6pcb *inp6 = sotoin6pcb(so); int error; if (inp6 == NULL) return EINVAL; /* allow v6 addresses precedence */ error = sctp6_getaddr(so, nam); if (error) { /* try v4 next if v6 failed */ error = sctp_sockaddr(so, nam); if (error) { return (error); } /* if I'm V6ONLY, convert it to v4-mapped */ if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) { struct sockaddr_in6 sin6; in6_sin_2_v4mapsin6((struct sockaddr_in *)nam, &sin6); memcpy(nam, &sin6, sizeof(struct sockaddr_in6)); } } return (error); } #if 0 static int sctp6_getpeeraddr(struct socket *so, struct sockaddr *nam) { struct in6pcb *inp6 = sotoin6pcb(so); int error; if (inp6 == NULL) return EINVAL; /* allow v6 addresses precedence */ error = sctp6_peeraddr(so, nam); if (error) { /* try v4 next if v6 failed */ error = sctp_peeraddr(so, nam); if (error) { return (error); } /* if I'm V6ONLY, convert it to v4-mapped */ if ((inp6->in6p_flags & IN6P_IPV6_V6ONLY)) { struct sockaddr_in6 sin6; in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); } } return error; } #endif static int sctp6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) { int error = 0; int family; if (cmd == SIOCCONNECTX) { solock(so); error = sctp_do_connect_x(so, nam, curlwp, 0); sounlock(so); } else if (cmd == SIOCCONNECTXDEL) { solock(so); error = sctp_do_connect_x(so, nam, curlwp, 1); sounlock(so); } else { family = so->so_proto->pr_domain->dom_family; switch (family) { #ifdef INET case PF_INET: error = in_control(so, cmd, nam, ifp); break; #endif #ifdef INET6 case PF_INET6: error = in6_control(so, cmd, nam, ifp); break; #endif default: error = EAFNOSUPPORT; } } return (error); } static int sctp6_accept(struct socket *so, struct sockaddr *nam) { return sctp_accept(so, nam); } static int sctp6_stat(struct socket *so, struct stat *ub) { return 0; } static int sctp6_listen(struct socket *so, struct lwp *l) { return sctp_listen(so, l); } static int sctp6_shutdown(struct socket *so) { return sctp_shutdown(so); } static int sctp6_rcvd(struct socket *so, int flags, struct lwp *l) { KASSERT(solocked(so)); return sctp_rcvd(so, flags, l); } static int sctp6_purgeif(struct socket *so, struct ifnet *ifp) { struct ifaddr *ifa; /* FIXME NOMPSAFE */ IFADDR_READER_FOREACH(ifa, ifp) { if (ifa->ifa_addr->sa_family == PF_INET6) { sctp_delete_ip_address(ifa); } } #ifndef NET_MPSAFE mutex_enter(softnet_lock); #endif in6_purgeif(ifp); #ifndef NET_MPSAFE mutex_exit(softnet_lock); #endif return 0; } PR_WRAP_USRREQS(sctp6) #define sctp6_attach sctp6_attach_wrapper #define sctp6_detach sctp6_detach_wrapper #define sctp6_accept sctp6_accept_wrapper #define sctp6_bind sctp6_bind_wrapper #define sctp6_listen sctp6_listen_wrapper #define sctp6_connect sctp6_connect_wrapper #define sctp6_connect2 sctp6_connect2_wrapper #define sctp6_disconnect sctp6_disconnect_wrapper #define sctp6_shutdown sctp6_shutdown_wrapper #define sctp6_abort sctp6_abort_wrapper #define sctp6_ioctl sctp6_ioctl_wrapper #define sctp6_stat sctp6_stat_wrapper #define sctp6_peeraddr sctp6_peeraddr_wrapper #define sctp6_sockaddr sctp6_sockaddr_wrapper #define sctp6_rcvd sctp6_rcvd_wrapper #define sctp6_recvoob sctp6_recvoob_wrapper #define sctp6_send sctp6_send_wrapper #define sctp6_sendoob sctp6_sendoob_wrapper #define sctp6_purgeif sctp6_purgeif_wrapper const struct pr_usrreqs sctp6_usrreqs = { .pr_attach = sctp6_attach, .pr_detach = sctp6_detach, .pr_accept = sctp6_accept, .pr_bind = sctp6_bind, .pr_listen = sctp6_listen, .pr_connect = sctp6_connect, .pr_connect2 = sctp6_connect2, .pr_disconnect = sctp6_disconnect, .pr_shutdown = sctp6_shutdown, .pr_abort = sctp6_abort, .pr_ioctl = sctp6_ioctl, .pr_stat = sctp6_stat, .pr_peeraddr = sctp6_peeraddr, .pr_sockaddr = sctp6_sockaddr, .pr_rcvd = sctp6_rcvd, .pr_recvoob = sctp6_recvoob, .pr_send = sctp6_send, .pr_sendoob = sctp6_sendoob, .pr_purgeif = sctp6_purgeif, };