From owner-svn-src-all@FreeBSD.ORG Mon Jul 2 16:44:10 2012 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 58BEC106566C; Mon, 2 Jul 2012 16:44:10 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 3B5C38FC1E; Mon, 2 Jul 2012 16:44:10 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q62GiAXF082147; Mon, 2 Jul 2012 16:44:10 GMT (envelope-from tuexen@svn.freebsd.org) Received: (from tuexen@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id q62GiAtH082142; Mon, 2 Jul 2012 16:44:10 GMT (envelope-from tuexen@svn.freebsd.org) Message-Id: <201207021644.q62GiAtH082142@svn.freebsd.org> From: Michael Tuexen Date: Mon, 2 Jul 2012 16:44:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r238003 - in head/sys: netinet netinet6 X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Jul 2012 16:44:10 -0000 Author: tuexen Date: Mon Jul 2 16:44:09 2012 New Revision: 238003 URL: http://svn.freebsd.org/changeset/base/238003 Log: Move common code parts to sctp_common_input_processing(). MFC after: 3 days Modified: head/sys/netinet/sctp_input.c head/sys/netinet/sctp_input.h head/sys/netinet6/sctp6_usrreq.c Modified: head/sys/netinet/sctp_input.c ============================================================================== --- head/sys/netinet/sctp_input.c Mon Jul 2 16:40:11 2012 (r238002) +++ head/sys/netinet/sctp_input.c Mon Jul 2 16:44:09 2012 (r238003) @@ -5590,26 +5590,141 @@ void sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_chunkhdr *ch, - struct sctp_inpcb *inp, struct sctp_tcb *stcb, - struct sctp_nets *net, uint8_t ecn_bits, +#if !defined(SCTP_WITH_NO_CSUM) + uint8_t compute_crc, +#endif + uint8_t ecn_bits, uint8_t use_mflowid, uint32_t mflowid, uint32_t vrf_id, uint16_t port) { - /* - * Control chunk processing - */ uint32_t high_tsn; int fwd_tsn_seen = 0, data_processed = 0; struct mbuf *m = *mm; int un_sent; int cnt_ctrl_ready = 0; + struct sctp_inpcb *inp, *inp_decr = NULL; + struct sctp_tcb *stcb = NULL; + struct sctp_nets *net; SCTP_STAT_INCR(sctps_recvdatagrams); #ifdef SCTP_AUDITING_ENABLED sctp_audit_log(0xE0, 1); sctp_auditing(0, inp, stcb, net); #endif +#if !defined(SCTP_WITH_NO_CSUM) + if (compute_crc != 0) { + uint32_t check, calc_check; + check = sh->checksum; + sh->checksum = 0; + calc_check = sctp_calculate_cksum(m, iphlen); + sh->checksum = check; + if (calc_check != check) { + SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", + calc_check, check, m, length, iphlen); + stcb = sctp_findassociation_addr(m, offset, src, dst, + sh, ch, &inp, &net, vrf_id); + if ((net != NULL) && (port != 0)) { + if (net->port == 0) { + sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); + } + net->port = port; + } + if ((net != NULL) && (use_mflowid != 0)) { + net->flowid = mflowid; +#ifdef INVARIANTS + net->flowidset = 1; +#endif + } + if ((inp != NULL) && (stcb != NULL)) { + sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1); + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); + } else if ((inp != NULL) && (stcb == NULL)) { + inp_decr = inp; + } + SCTP_STAT_INCR(sctps_badsum); + SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); + goto out; + } + } +#endif + /* Destination port of 0 is illegal, based on RFC4960. */ + if (sh->dest_port == 0) { + SCTP_STAT_INCR(sctps_hdrops); + goto out; + } + stcb = sctp_findassociation_addr(m, offset, src, dst, + sh, ch, &inp, &net, vrf_id); + if ((net != NULL) && (port != 0)) { + if (net->port == 0) { + sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); + } + net->port = port; + } + if ((net != NULL) && (use_mflowid != 0)) { + net->flowid = mflowid; +#ifdef INVARIANTS + net->flowidset = 1; +#endif + } + if (inp == NULL) { + SCTP_STAT_INCR(sctps_noport); + if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) { + goto out; + } + if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { + sctp_send_shutdown_complete2(src, dst, sh, + use_mflowid, mflowid, + vrf_id, port); + goto out; + } + if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { + goto out; + } + if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) { + if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) || + ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) && + (ch->chunk_type != SCTP_INIT))) { + sctp_send_abort(m, iphlen, src, dst, + sh, 0, NULL, + use_mflowid, mflowid, + vrf_id, port); + } + } + goto out; + } else if (stcb == NULL) { + inp_decr = inp; + } +#ifdef IPSEC + /*- + * I very much doubt any of the IPSEC stuff will work but I have no + * idea, so I will leave it in place. + */ + if (inp != NULL) { + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + if (ipsec4_in_reject(m, &inp->ip_inp.inp)) { + MODULE_GLOBAL(ipsec4stat).in_polvio++; + SCTP_STAT_INCR(sctps_hdrops); + goto out; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (ipsec6_in_reject(m, &inp->ip_inp.inp)) { + MODULE_GLOBAL(ipsec6stat).in_polvio++; + SCTP_STAT_INCR(sctps_hdrops); + goto out; + } + break; +#endif + default: + break; + } + } +#endif SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n", m, iphlen, offset, length, stcb); if (stcb) { @@ -5628,10 +5743,11 @@ sctp_common_input_processing(struct mbuf * NOT respond to any packet.. its OOTB. */ SCTP_TCB_UNLOCK(stcb); + stcb = NULL; sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, use_mflowid, mflowid, vrf_id, port); - goto out_now; + goto out; } } if (IS_SCTP_CONTROL(ch)) { @@ -5671,21 +5787,19 @@ sctp_common_input_processing(struct mbuf sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) { /* "silently" ignore */ SCTP_STAT_INCR(sctps_recvauthmissing); - SCTP_TCB_UNLOCK(stcb); - goto out_now; + goto out; } if (stcb == NULL) { /* out of the blue DATA chunk */ sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, use_mflowid, mflowid, vrf_id, port); - goto out_now; + goto out; } if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { /* v_tag mismatch! */ SCTP_STAT_INCR(sctps_badvtag); - SCTP_TCB_UNLOCK(stcb); - goto out_now; + goto out; } } @@ -5695,7 +5809,7 @@ sctp_common_input_processing(struct mbuf * packet while processing control, or we're done with this * packet (done or skip rest of data), so we drop it... */ - goto out_now; + goto out; } /* * DATA chunk processing @@ -5749,8 +5863,7 @@ sctp_common_input_processing(struct mbuf sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, use_mflowid, mflowid, vrf_id, port); - SCTP_TCB_UNLOCK(stcb); - goto out_now; + goto out; /* sa_ignore NOTREACHED */ break; case SCTP_STATE_EMPTY: /* should not happen */ @@ -5758,8 +5871,7 @@ sctp_common_input_processing(struct mbuf case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ case SCTP_STATE_SHUTDOWN_ACK_SENT: default: - SCTP_TCB_UNLOCK(stcb); - goto out_now; + goto out; /* sa_ignore NOTREACHED */ break; case SCTP_STATE_OPEN: @@ -5777,7 +5889,8 @@ sctp_common_input_processing(struct mbuf * The association aborted, NO UNLOCK needed since * the association is destroyed. */ - goto out_now; + stcb = NULL; + goto out; } data_processed = 1; /* @@ -5834,10 +5947,20 @@ trigger_send: sctp_audit_log(0xE0, 3); sctp_auditing(2, inp, stcb, net); #endif - SCTP_TCB_UNLOCK(stcb); -out_now: +out: + if (stcb != NULL) { + SCTP_TCB_UNLOCK(stcb); + } + if (inp_decr != NULL) { + /* reduce ref-count */ + SCTP_INP_WLOCK(inp_decr); + SCTP_INP_DECR_REF(inp_decr); + SCTP_INP_WUNLOCK(inp_decr); + } #ifdef INVARIANTS - sctp_validate_no_locks(inp); + if (inp != NULL) { + sctp_validate_no_locks(inp); + } #endif return; } @@ -5867,18 +5990,14 @@ sctp_input_with_port(struct mbuf *i_pak, struct ip *ip; struct sctphdr *sh; struct sctp_chunkhdr *ch; - struct sctp_inpcb *inp = NULL; - struct sctp_tcb *stcb = NULL; - struct sctp_nets *net = NULL; - int refcount_up = 0; int length, offset; - uint32_t mflowid; - uint8_t use_mflowid; #if !defined(SCTP_WITH_NO_CSUM) - uint32_t check, calc_check; + uint8_t compute_crc; #endif + uint32_t mflowid; + uint8_t use_mflowid; iphlen = off; if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) { @@ -5903,6 +6022,11 @@ sctp_input_with_port(struct mbuf *i_pak, sctp_packet_log(m); } #endif + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", + m->m_pkthdr.len, + if_name(m->m_pkthdr.rcvif), + m->m_pkthdr.csum_flags); if (m->m_flags & M_FLOWID) { mflowid = m->m_pkthdr.flowid; use_mflowid = 1; @@ -5936,161 +6060,42 @@ sctp_input_with_port(struct mbuf *i_pak, dst.sin_addr = ip->ip_dst; length = ip->ip_len + iphlen; /* Validate mbuf chain length with IP payload length. */ - if (SCTP_HEADER_LEN(i_pak) != length) { + if (SCTP_HEADER_LEN(m) != length) { SCTPDBG(SCTP_DEBUG_INPUT1, - "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(i_pak)); + "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); SCTP_STAT_INCR(sctps_hdrops); - goto bad; + goto out; } /* SCTP does not allow broadcasts or multicasts */ if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) { - goto bad; + goto out; } if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) { - goto bad; + goto out; } - SCTPDBG(SCTP_DEBUG_INPUT1, - "sctp_input() length:%d iphlen:%d\n", length, iphlen); - SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, - "sctp_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", - m->m_pkthdr.len, - if_name(m->m_pkthdr.rcvif), - m->m_pkthdr.csum_flags); + ecn_bits = ip->ip_tos; #if defined(SCTP_WITH_NO_CSUM) SCTP_STAT_INCR(sctps_recvnocrc); #else if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { SCTP_STAT_INCR(sctps_recvhwcrc); - goto sctp_skip_csum; - } - check = sh->checksum; - sh->checksum = 0; - calc_check = sctp_calculate_cksum(m, iphlen); - sh->checksum = check; - SCTP_STAT_INCR(sctps_recvswcrc); - if (calc_check != check) { - SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", - calc_check, check, m, length, iphlen); - stcb = sctp_findassociation_addr(m, offset, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, ch, &inp, &net, vrf_id); - if ((net) && (port)) { - if (net->port == 0) { - sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); - } - net->port = port; - } - if ((net != NULL) && (use_mflowid != 0)) { - net->flowid = mflowid; -#ifdef INVARIANTS - net->flowidset = 1; -#endif - } - if ((inp) && (stcb)) { - sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1); - sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); - } else if ((inp != NULL) && (stcb == NULL)) { - refcount_up = 1; - } - SCTP_STAT_INCR(sctps_badsum); - SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); - goto bad; - } -sctp_skip_csum: -#endif - /* destination port of 0 is illegal, based on RFC2960. */ - if (sh->dest_port == 0) { - SCTP_STAT_INCR(sctps_hdrops); - goto bad; - } - stcb = sctp_findassociation_addr(m, offset, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, ch, &inp, &net, vrf_id); - if ((net) && (port)) { - if (net->port == 0) { - sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); - } - net->port = port; - } - if ((net != NULL) && (use_mflowid != 0)) { - net->flowid = mflowid; -#ifdef INVARIANTS - net->flowidset = 1; -#endif - } - if (inp == NULL) { - SCTP_STAT_INCR(sctps_noport); - if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) - goto bad; - if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { - sctp_send_shutdown_complete2((struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, - use_mflowid, mflowid, - vrf_id, port); - goto bad; - } - if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { - goto bad; - } - if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) { - if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) || - ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) && - (ch->chunk_type != SCTP_INIT))) { - sctp_send_abort(m, iphlen, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, 0, NULL, - use_mflowid, mflowid, - vrf_id, port); - } - } - goto bad; - } else if (stcb == NULL) { - refcount_up = 1; - } -#ifdef IPSEC - /*- - * I very much doubt any of the IPSEC stuff will work but I have no - * idea, so I will leave it in place. - */ - if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { - MODULE_GLOBAL(ipsec4stat).in_polvio++; - SCTP_STAT_INCR(sctps_hdrops); - goto bad; + compute_crc = 0; + } else { + SCTP_STAT_INCR(sctps_recvswcrc); + compute_crc = 1; } #endif - - ecn_bits = ip->ip_tos; - /* sa_ignore NO_NULL_CHK */ sctp_common_input_processing(&m, iphlen, offset, length, (struct sockaddr *)&src, (struct sockaddr *)&dst, - sh, ch, inp, stcb, net, ecn_bits, + sh, ch, +#if !defined(SCTP_WITH_NO_CSUM) + compute_crc, +#endif + ecn_bits, use_mflowid, mflowid, vrf_id, port); - if (m) { - sctp_m_freem(m); - } - if ((inp) && (refcount_up)) { - /* reduce ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } - return; -bad: - if (stcb) { - SCTP_TCB_UNLOCK(stcb); - } - if ((inp) && (refcount_up)) { - /* reduce ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } +out: if (m) { sctp_m_freem(m); } Modified: head/sys/netinet/sctp_input.h ============================================================================== --- head/sys/netinet/sctp_input.h Mon Jul 2 16:40:11 2012 (r238002) +++ head/sys/netinet/sctp_input.h Mon Jul 2 16:44:09 2012 (r238003) @@ -41,8 +41,10 @@ void sctp_common_input_processing(struct mbuf **, int, int, int, struct sockaddr *, struct sockaddr *, struct sctphdr *, struct sctp_chunkhdr *, - struct sctp_inpcb *, struct sctp_tcb *, - struct sctp_nets *, uint8_t, +#if !defined(SCTP_WITH_NO_CSUM) + uint8_t, +#endif + uint8_t, uint8_t, uint32_t, uint32_t, uint16_t); Modified: head/sys/netinet6/sctp6_usrreq.c ============================================================================== --- head/sys/netinet6/sctp6_usrreq.c Mon Jul 2 16:40:11 2012 (r238002) +++ head/sys/netinet6/sctp6_usrreq.c Mon Jul 2 16:44:09 2012 (r238003) @@ -69,24 +69,20 @@ sctp6_input(struct mbuf **i_pak, int *of { struct mbuf *m; int iphlen; - uint32_t vrf_id = 0; + uint32_t vrf_id; uint8_t ecn_bits; struct sockaddr_in6 src, dst; struct ip6_hdr *ip6; struct sctphdr *sh; struct sctp_chunkhdr *ch; - struct sctp_inpcb *inp = NULL; - struct sctp_tcb *stcb = NULL; - struct sctp_nets *net = NULL; - int refcount_up = 0; int length, offset; - uint32_t mflowid; - uint8_t use_mflowid; #if !defined(SCTP_WITH_NO_CSUM) - uint32_t check, calc_check; + uint8_t compute_crc; #endif + uint32_t mflowid; + uint8_t use_mflowid; uint16_t port = 0; iphlen = *offp; @@ -112,6 +108,11 @@ sctp6_input(struct mbuf **i_pak, int *of sctp_packet_log(m); } #endif + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", + m->m_pkthdr.len, + if_name(m->m_pkthdr.rcvif), + m->m_pkthdr.csum_flags); if (m->m_flags & M_FLOWID) { mflowid = m->m_pkthdr.flowid; use_mflowid = 1; @@ -122,8 +123,8 @@ sctp6_input(struct mbuf **i_pak, int *of SCTP_STAT_INCR(sctps_recvpackets); SCTP_STAT_INCR_COUNTER64(sctps_inpackets); /* Get IP, SCTP, and first chunk header together in the first mbuf. */ - ip6 = mtod(m, struct ip6_hdr *); offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); + ip6 = mtod(m, struct ip6_hdr *); IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); if (sh == NULL) { @@ -138,7 +139,7 @@ sctp6_input(struct mbuf **i_pak, int *of 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 bad; + goto out; } memset(&dst, 0, sizeof(struct sockaddr_in6)); dst.sin6_family = AF_INET6; @@ -146,165 +147,46 @@ sctp6_input(struct mbuf **i_pak, int *of 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 bad; + goto out; } if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { /* XXX send icmp6 host/port unreach? */ - goto bad; + goto out; } length = ntohs(ip6->ip6_plen) + iphlen; /* Validate mbuf chain length with IP payload length. */ - if (SCTP_HEADER_LEN(*i_pak) != length) { + if (SCTP_HEADER_LEN(m) != length) { SCTPDBG(SCTP_DEBUG_INPUT1, - "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(*i_pak)); + "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); SCTP_STAT_INCR(sctps_hdrops); - goto bad; + goto out; } if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { - goto bad; + goto out; } - SCTPDBG(SCTP_DEBUG_INPUT1, - "sctp6_input() length:%d iphlen:%d\n", length, iphlen); - SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, - "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", - m->m_pkthdr.len, - if_name(m->m_pkthdr.rcvif), - m->m_pkthdr.csum_flags); + ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); #if defined(SCTP_WITH_NO_CSUM) SCTP_STAT_INCR(sctps_recvnocrc); #else if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { SCTP_STAT_INCR(sctps_recvhwcrc); - goto sctp_skip_csum; - } - check = sh->checksum; - sh->checksum = 0; - calc_check = sctp_calculate_cksum(m, iphlen); - sh->checksum = check; - SCTP_STAT_INCR(sctps_recvswcrc); - if (calc_check != check) { - SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", - calc_check, check, m, length, iphlen); - stcb = sctp_findassociation_addr(m, offset, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, ch, &inp, &net, vrf_id); - if ((net) && (port)) { - if (net->port == 0) { - sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); - } - net->port = port; - } - if ((net != NULL) && (use_mflowid != 0)) { - net->flowid = mflowid; -#ifdef INVARIANTS - net->flowidset = 1; -#endif - } - if ((inp) && (stcb)) { - sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1); - sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); - } else if ((inp != NULL) && (stcb == NULL)) { - refcount_up = 1; - } - SCTP_STAT_INCR(sctps_badsum); - SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); - goto bad; - } -sctp_skip_csum: -#endif - /* destination port of 0 is illegal, based on RFC2960. */ - if (sh->dest_port == 0) { - SCTP_STAT_INCR(sctps_hdrops); - goto bad; - } - stcb = sctp_findassociation_addr(m, offset, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, ch, &inp, &net, vrf_id); - if ((net) && (port)) { - if (net->port == 0) { - sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); - } - net->port = port; - } - if ((net != NULL) && (use_mflowid != 0)) { - net->flowid = mflowid; -#ifdef INVARIANTS - net->flowidset = 1; -#endif - } - if (inp == NULL) { - SCTP_STAT_INCR(sctps_noport); - if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) - goto bad; - if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { - sctp_send_shutdown_complete2((struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, - use_mflowid, mflowid, - vrf_id, port); - goto bad; - } - if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { - goto bad; - } - if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) { - if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) || - ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) && - (ch->chunk_type != SCTP_INIT))) { - sctp_send_abort(m, iphlen, - (struct sockaddr *)&src, - (struct sockaddr *)&dst, - sh, 0, NULL, - use_mflowid, mflowid, - vrf_id, port); - } - } - goto bad; - } else if (stcb == NULL) { - refcount_up = 1; - } -#ifdef IPSEC - /*- - * I very much doubt any of the IPSEC stuff will work but I have no - * idea, so I will leave it in place. - */ - if (inp && ipsec6_in_reject(m, &inp->ip_inp.inp)) { - MODULE_GLOBAL(ipsec6stat).in_polvio++; - SCTP_STAT_INCR(sctps_hdrops); - goto bad; + compute_crc = 0; + } else { + SCTP_STAT_INCR(sctps_recvswcrc); + compute_crc = 1; } #endif - - ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); - /* sa_ignore NO_NULL_CHK */ sctp_common_input_processing(&m, iphlen, offset, length, (struct sockaddr *)&src, (struct sockaddr *)&dst, - sh, ch, inp, stcb, net, ecn_bits, + sh, ch, +#if !defined(SCTP_WITH_NO_CSUM) + compute_crc, +#endif + ecn_bits, use_mflowid, mflowid, vrf_id, port); - if (m) { - sctp_m_freem(m); - } - if ((inp) && (refcount_up)) { - /* reduce ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } - return (IPPROTO_DONE); -bad: - if (stcb) { - SCTP_TCB_UNLOCK(stcb); - } - if ((inp) && (refcount_up)) { - /* reduce ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } +out: if (m) { sctp_m_freem(m); }