From patchwork Mon Jun 21 23:54:50 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tilman Schmidt X-Patchwork-Id: 56379 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 05EFBB6F0C for ; Tue, 22 Jun 2010 10:06:06 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932870Ab0FVAEj (ORCPT ); Mon, 21 Jun 2010 20:04:39 -0400 Received: from mail.pxnet.com ([89.1.7.7]:38340 "EHLO mail.pxnet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932856Ab0FVAEi (ORCPT ); Mon, 21 Jun 2010 20:04:38 -0400 Received: from xenon.ts.pxnet.com (pD9E8602C.dip.t-dialin.net [217.232.96.44]) (user=ts author=<> mech=DIGEST-MD5 bits=0) by mail.pxnet.com (8.13.8/8.13.8) with ESMTP id o5LNtdTU019157 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 22 Jun 2010 01:55:42 +0200 Received: by xenon.ts.pxnet.com (Postfix, from userid 1000) id 52AAC40121; Tue, 22 Jun 2010 01:54:50 +0200 (CEST) Subject: [PATCH 3/5] isdn/gigaset: correct CAPI DATA_B3 Delivery Confirmation From: Tilman Schmidt To: Karsten Keil , David Miller CC: Hansjoerg Lipp , Karsten Keil , i4ldeveloper@listserv.isdn4linux.de, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Message-ID: <20100622-patch-gigaset-03.tilman@imap.cc> In-Reply-To: <20100622-patch-gigaset-00.tilman@imap.cc> References: <20100622-patch-gigaset-00.tilman@imap.cc> Date: Tue, 22 Jun 2010 01:54:50 +0200 (CEST) X-Spam-Score: -2.07 () AWL,BAYES_00,RDNS_DYNAMIC X-Scanned-By: MIMEDefang 2.69 on 89.1.7.7 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The Gigaset CAPI driver handled all DATA_B3_REQ messages as if the Delivery Confirmation flag bit was set, delaying the emission of the DATA_B3_CONF reply until the data was actually transmitted. Some CAPI applications (notably Asterisk) aren't happy with that behaviour. Change it to actually evaluate the Delivery Confirmation flag as described the CAPI specification. Impact: bugfix Signed-off-by: Tilman Schmidt --- drivers/isdn/gigaset/capi.c | 83 ++++++++++++++++++++++++++---------------- 1 files changed, 51 insertions(+), 32 deletions(-) diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c index cb55ead..e685123 100644 --- a/drivers/isdn/gigaset/capi.c +++ b/drivers/isdn/gigaset/capi.c @@ -320,6 +320,39 @@ static const char *format_ie(const char *ie) return result; } +/* + * emit DATA_B3_CONF message + */ +static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr, + u16 appl, u16 msgid, int channel, + u16 handle, u16 info) +{ + struct sk_buff *cskb; + u8 *msg; + + cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC); + if (!cskb) { + dev_err(cs->dev, "%s: out of memory\n", __func__); + return; + } + /* frequent message, avoid _cmsg overhead */ + msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN); + CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN); + CAPIMSG_SETAPPID(msg, appl); + CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3); + CAPIMSG_SETSUBCOMMAND(msg, CAPI_CONF); + CAPIMSG_SETMSGID(msg, msgid); + CAPIMSG_SETCONTROLLER(msg, ctr->cnr); + CAPIMSG_SETPLCI_PART(msg, channel); + CAPIMSG_SETNCCI_PART(msg, 1); + CAPIMSG_SETHANDLE_CONF(msg, handle); + CAPIMSG_SETINFO_CONF(msg, info); + + /* emit message */ + dump_rawmsg(DEBUG_MCMD, __func__, msg); + capi_ctr_handle_message(ctr, appl, cskb); +} + /* * driver interface functions @@ -340,7 +373,6 @@ void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb) struct gigaset_capi_ctr *iif = cs->iif; struct gigaset_capi_appl *ap = bcs->ap; unsigned char *req = skb_mac_header(dskb); - struct sk_buff *cskb; u16 flags; /* update statistics */ @@ -357,34 +389,17 @@ void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb) return; } - /* ToDo: honor unset "delivery confirmation" bit */ + /* + * send DATA_B3_CONF if "delivery confirmation" bit was set in request; + * otherwise it has already been sent by do_data_b3_req() + */ flags = CAPIMSG_FLAGS(req); - - /* build DATA_B3_CONF message */ - cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC); - if (!cskb) { - dev_err(cs->dev, "%s: out of memory\n", __func__); - return; - } - /* frequent message, avoid _cmsg overhead */ - CAPIMSG_SETLEN(cskb->data, CAPI_DATA_B3_CONF_LEN); - CAPIMSG_SETAPPID(cskb->data, ap->id); - CAPIMSG_SETCOMMAND(cskb->data, CAPI_DATA_B3); - CAPIMSG_SETSUBCOMMAND(cskb->data, CAPI_CONF); - CAPIMSG_SETMSGID(cskb->data, CAPIMSG_MSGID(req)); - CAPIMSG_SETCONTROLLER(cskb->data, iif->ctr.cnr); - CAPIMSG_SETPLCI_PART(cskb->data, bcs->channel + 1); - CAPIMSG_SETNCCI_PART(cskb->data, 1); - CAPIMSG_SETHANDLE_CONF(cskb->data, CAPIMSG_HANDLE_REQ(req)); - if (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) - CAPIMSG_SETINFO_CONF(cskb->data, - CapiFlagsNotSupportedByProtocol); - else - CAPIMSG_SETINFO_CONF(cskb->data, CAPI_NOERROR); - - /* emit message */ - dump_rawmsg(DEBUG_LLDATA, "DATA_B3_CONF", cskb->data); - capi_ctr_handle_message(&iif->ctr, ap->id, cskb); + if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION) + send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req), + bcs->channel + 1, CAPIMSG_HANDLE_REQ(req), + (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ? + CapiFlagsNotSupportedByProtocol : + CAPI_NOERROR); } EXPORT_SYMBOL_GPL(gigaset_skb_sent); @@ -1795,6 +1810,8 @@ static void do_data_b3_req(struct gigaset_capi_ctr *iif, u16 msglen = CAPIMSG_LEN(skb->data); u16 datalen = CAPIMSG_DATALEN(skb->data); u16 flags = CAPIMSG_FLAGS(skb->data); + u16 msgid = CAPIMSG_MSGID(skb->data); + u16 handle = CAPIMSG_HANDLE_REQ(skb->data); /* frequent message, avoid _cmsg overhead */ dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data); @@ -1845,12 +1862,14 @@ static void do_data_b3_req(struct gigaset_capi_ctr *iif, return; } - /* DATA_B3_CONF reply will be sent by gigaset_skb_sent() */ - /* - * ToDo: honor unset "delivery confirmation" bit - * (send DATA_B3_CONF immediately?) + * DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery + * confirmation" bit is set; otherwise we have to send it now */ + if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)) + send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle, + flags ? CapiFlagsNotSupportedByProtocol + : CAPI_NOERROR); } /*