From owner-svn-src-head@freebsd.org Tue Nov 14 02:30:22 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DF5AFC7FCC8; Tue, 14 Nov 2017 02:30:22 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A16A66949F; Tue, 14 Nov 2017 02:30:22 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vAE2ULCx074975; Tue, 14 Nov 2017 02:30:21 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vAE2ULo0074974; Tue, 14 Nov 2017 02:30:21 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201711140230.vAE2ULo0074974@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Tue, 14 Nov 2017 02:30:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r325788 - head/sys/netinet X-SVN-Group: head X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: head/sys/netinet X-SVN-Commit-Revision: 325788 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Nov 2017 02:30:23 -0000 Author: tuexen Date: Tue Nov 14 02:30:21 2017 New Revision: 325788 URL: https://svnweb.freebsd.org/changeset/base/325788 Log: Simply the code and use the full buffer for contigous chunk representation. MFC after: 1 week Modified: head/sys/netinet/sctp_input.c Modified: head/sys/netinet/sctp_input.c ============================================================================== --- head/sys/netinet/sctp_input.c Tue Nov 14 01:57:54 2017 (r325787) +++ head/sys/netinet/sctp_input.c Tue Nov 14 02:30:21 2017 (r325788) @@ -4524,7 +4524,7 @@ sctp_process_control(struct mbuf *m, int iphlen, int * char msg[SCTP_DIAG_INFO_LEN]; uint32_t vtag_in; int num_chunks = 0; /* number of control chunks processed */ - uint32_t chk_length; + uint32_t chk_length, contiguous; int ret; int abort_no_unlock = 0; int ecne_seen = 0; @@ -4750,58 +4750,30 @@ process_control_chunks: } SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); /* - * INIT-ACK only gets the init ack "header" portion only - * because we don't have to process the peer's COOKIE. All - * others get a complete chunk. + * INIT and INIT-ACK only gets the init ack "header" portion + * only because we don't have to process the peer's COOKIE. + * All others get a complete chunk. */ - if ((ch->chunk_type == SCTP_INITIATION_ACK) || - (ch->chunk_type == SCTP_INITIATION)) { - /* get an init-ack chunk */ - ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, - sizeof(struct sctp_init_ack_chunk), chunk_buf); - if (ch == NULL) { - *offset = length; - if (stcb != NULL) { - SCTP_TCB_UNLOCK(stcb); - } - return (NULL); + switch (ch->chunk_type) { + case SCTP_INITIATION: + contiguous = sizeof(struct sctp_init_chunk); + break; + case SCTP_INITIATION_ACK: + contiguous = sizeof(struct sctp_init_ack_chunk); + break; + default: + contiguous = min(chk_length, sizeof(chunk_buf)); + break; + } + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, + contiguous, + chunk_buf); + if (ch == NULL) { + *offset = length; + if (stcb != NULL) { + SCTP_TCB_UNLOCK(stcb); } - } else { - /* For cookies and all other chunks. */ - if (chk_length > sizeof(chunk_buf)) { - /* - * use just the size of the chunk buffer so - * the front part of our chunks fit in - * contiguous space up to the chunk buffer - * size (508 bytes). For chunks that need to - * get more than that they must use the - * sctp_m_getptr() function or other means - * (e.g. know how to parse mbuf chains). - * Cookies do this already. - */ - ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, - (sizeof(chunk_buf) - 4), - chunk_buf); - if (ch == NULL) { - *offset = length; - if (stcb != NULL) { - SCTP_TCB_UNLOCK(stcb); - } - return (NULL); - } - } else { - /* We can fit it all */ - ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, - chk_length, chunk_buf); - if (ch == NULL) { - SCTP_PRINTF("sctp_process_control: Can't get the all data....\n"); - *offset = length; - if (stcb != NULL) { - SCTP_TCB_UNLOCK(stcb); - } - return (NULL); - } - } + return (NULL); } num_chunks++; /* Save off the last place we got a control from */ @@ -5410,7 +5382,7 @@ process_control_chunks: } sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, stcb, *netp, - min(chk_length, (sizeof(chunk_buf) - 4))); + min(chk_length, contiguous)); } break; case SCTP_AUTHENTICATION: