![Joe Perches](/assets/img/avatar_default.png)
Use the generic facility instead of a home-grown one. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
1508 lines
41 KiB
C
1508 lines
41 KiB
C
/*
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* dvb_net.c
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*
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* Copyright (C) 2001 Convergence integrated media GmbH
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* Ralph Metzler <ralph@convergence.de>
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* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
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*
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* ULE Decapsulation code:
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* Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
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* and Department of Scientific Computing
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* Paris Lodron University of Salzburg.
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* Hilmar Linder <hlinder@cosy.sbg.ac.at>
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* and Wolfram Stering <wstering@cosy.sbg.ac.at>
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*
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* ULE Decaps according to RFC 4326.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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*/
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/*
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* ULE ChangeLog:
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* Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
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*
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* Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
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* ULE Extension header handling.
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* Bugreports by Moritz Vieth and Hanno Tersteegen,
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* Fraunhofer Institute for Open Communication Systems
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* Competence Center for Advanced Satellite Communications.
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* Bugfixes and robustness improvements.
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* Filtering on dest MAC addresses, if present (D-Bit = 0)
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* ULE_DEBUG compile-time option.
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* Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by
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* Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
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* Paris Lodron University of Salzburg.
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*/
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/*
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* FIXME / TODO (dvb_net.c):
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*
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* Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/dvb/net.h>
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#include <linux/uio.h>
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#include <asm/uaccess.h>
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#include <linux/crc32.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include "dvb_demux.h"
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#include "dvb_net.h"
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static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
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{
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unsigned int j;
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for (j = 0; j < cnt; j++)
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c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
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return c;
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}
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#define DVB_NET_MULTICAST_MAX 10
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#undef ULE_DEBUG
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#ifdef ULE_DEBUG
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static void hexdump(const unsigned char *buf, unsigned short len)
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{
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print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
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}
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#endif
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struct dvb_net_priv {
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int in_use;
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u16 pid;
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struct net_device *net;
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struct dvb_net *host;
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struct dmx_demux *demux;
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struct dmx_section_feed *secfeed;
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struct dmx_section_filter *secfilter;
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struct dmx_ts_feed *tsfeed;
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int multi_num;
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struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
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unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
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int rx_mode;
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#define RX_MODE_UNI 0
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#define RX_MODE_MULTI 1
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#define RX_MODE_ALL_MULTI 2
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#define RX_MODE_PROMISC 3
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struct work_struct set_multicast_list_wq;
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struct work_struct restart_net_feed_wq;
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unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
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int need_pusi; /* Set to 1, if synchronization on PUSI required. */
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unsigned char tscc; /* TS continuity counter after sync on PUSI. */
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struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
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unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
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unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
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unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
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unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
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unsigned char ule_dbit; /* Whether the DestMAC address present
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* or not (bit is set). */
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unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
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int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
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unsigned long ts_count; /* Current ts cell counter. */
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struct mutex mutex;
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};
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/**
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* Determine the packet's protocol ID. The rule here is that we
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* assume 802.3 if the type field is short enough to be a length.
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* This is normal practice and works for any 'now in use' protocol.
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*
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* stolen from eth.c out of the linux kernel, hacked for dvb-device
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* by Michael Holzt <kju@debian.org>
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*/
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static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct ethhdr *eth;
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unsigned char *rawp;
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skb_reset_mac_header(skb);
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skb_pull(skb,dev->hard_header_len);
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eth = eth_hdr(skb);
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if (*eth->h_dest & 1) {
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if(ether_addr_equal(eth->h_dest,dev->broadcast))
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skb->pkt_type=PACKET_BROADCAST;
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else
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skb->pkt_type=PACKET_MULTICAST;
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}
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if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
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return eth->h_proto;
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rawp = skb->data;
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/**
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* This is a magic hack to spot IPX packets. Older Novell breaks
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
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* won't work for fault tolerant netware but does for the rest.
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*/
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if (*(unsigned short *)rawp == 0xFFFF)
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return htons(ETH_P_802_3);
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/**
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* Real 802.2 LLC
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*/
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return htons(ETH_P_802_2);
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}
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#define TS_SZ 188
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#define TS_SYNC 0x47
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#define TS_TEI 0x80
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#define TS_SC 0xC0
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#define TS_PUSI 0x40
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#define TS_AF_A 0x20
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#define TS_AF_D 0x10
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/* ULE Extension Header handlers. */
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#define ULE_TEST 0
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#define ULE_BRIDGED 1
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#define ULE_OPTEXTHDR_PADDING 0
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static int ule_test_sndu( struct dvb_net_priv *p )
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{
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return -1;
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}
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static int ule_bridged_sndu( struct dvb_net_priv *p )
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{
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struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
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if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) {
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int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
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/* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */
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if(framelen != ntohs(hdr->h_proto)) {
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return -1;
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}
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}
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/* Note:
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* From RFC4326:
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* "A bridged SNDU is a Mandatory Extension Header of Type 1.
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* It must be the final (or only) extension header specified in the header chain of a SNDU."
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* The 'ule_bridged' flag will cause the extension header processing loop to terminate.
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*/
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p->ule_bridged = 1;
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return 0;
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}
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static int ule_exthdr_padding(struct dvb_net_priv *p)
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{
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return 0;
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}
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/** Handle ULE extension headers.
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* Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
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* Returns: >= 0: nr. of bytes consumed by next extension header
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* -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
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*/
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static int handle_one_ule_extension( struct dvb_net_priv *p )
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{
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/* Table of mandatory extension header handlers. The header type is the index. */
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static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
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{ [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
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/* Table of optional extension header handlers. The header type is the index. */
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static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
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{ [0] = ule_exthdr_padding, [1] = NULL, };
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int ext_len = 0;
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unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
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unsigned char htype = p->ule_sndu_type & 0x00FF;
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/* Discriminate mandatory and optional extension headers. */
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if (hlen == 0) {
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/* Mandatory extension header */
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if (ule_mandatory_ext_handlers[htype]) {
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ext_len = ule_mandatory_ext_handlers[htype]( p );
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if(ext_len >= 0) {
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p->ule_next_hdr += ext_len;
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if (!p->ule_bridged) {
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p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
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p->ule_next_hdr += 2;
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} else {
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p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
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/* This assures the extension handling loop will terminate. */
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}
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}
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// else: extension handler failed or SNDU should be discarded
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} else
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ext_len = -1; /* SNDU has to be discarded. */
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} else {
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/* Optional extension header. Calculate the length. */
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ext_len = hlen << 1;
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/* Process the optional extension header according to its type. */
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if (ule_optional_ext_handlers[htype])
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(void)ule_optional_ext_handlers[htype]( p );
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p->ule_next_hdr += ext_len;
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p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
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/*
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* note: the length of the next header type is included in the
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* length of THIS optional extension header
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*/
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}
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return ext_len;
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}
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static int handle_ule_extensions( struct dvb_net_priv *p )
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{
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int total_ext_len = 0, l;
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p->ule_next_hdr = p->ule_skb->data;
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do {
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l = handle_one_ule_extension( p );
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if (l < 0)
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return l; /* Stop extension header processing and discard SNDU. */
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total_ext_len += l;
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#ifdef ULE_DEBUG
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pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n",
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p->ule_next_hdr, (int)p->ule_sndu_type,
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l, total_ext_len);
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#endif
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} while (p->ule_sndu_type < ETH_P_802_3_MIN);
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return total_ext_len;
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}
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/** Prepare for a new ULE SNDU: reset the decoder state. */
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static inline void reset_ule( struct dvb_net_priv *p )
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{
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p->ule_skb = NULL;
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p->ule_next_hdr = NULL;
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p->ule_sndu_len = 0;
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p->ule_sndu_type = 0;
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p->ule_sndu_type_1 = 0;
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p->ule_sndu_remain = 0;
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p->ule_dbit = 0xFF;
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p->ule_bridged = 0;
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}
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/**
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* Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
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* TS cells of a single PID.
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*/
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static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
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{
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struct dvb_net_priv *priv = netdev_priv(dev);
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unsigned long skipped = 0L;
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const u8 *ts, *ts_end, *from_where = NULL;
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u8 ts_remain = 0, how_much = 0, new_ts = 1;
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struct ethhdr *ethh = NULL;
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bool error = false;
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#ifdef ULE_DEBUG
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/* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
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static unsigned char ule_hist[100*TS_SZ];
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static unsigned char *ule_where = ule_hist, ule_dump;
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#endif
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/* For all TS cells in current buffer.
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* Appearently, we are called for every single TS cell.
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*/
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for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
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if (new_ts) {
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/* We are about to process a new TS cell. */
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#ifdef ULE_DEBUG
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if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
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memcpy( ule_where, ts, TS_SZ );
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if (ule_dump) {
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hexdump( ule_where, TS_SZ );
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ule_dump = 0;
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}
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ule_where += TS_SZ;
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#endif
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/* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
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if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
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printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
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priv->ts_count, ts[0],
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(ts[1] & TS_TEI) >> 7,
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(ts[3] & TS_SC) >> 6);
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/* Drop partly decoded SNDU, reset state, resync on PUSI. */
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if (priv->ule_skb) {
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dev_kfree_skb( priv->ule_skb );
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/* Prepare for next SNDU. */
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dev->stats.rx_errors++;
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dev->stats.rx_frame_errors++;
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}
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reset_ule(priv);
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priv->need_pusi = 1;
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/* Continue with next TS cell. */
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ts += TS_SZ;
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priv->ts_count++;
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continue;
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}
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ts_remain = 184;
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from_where = ts + 4;
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}
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/* Synchronize on PUSI, if required. */
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if (priv->need_pusi) {
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if (ts[1] & TS_PUSI) {
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/* Find beginning of first ULE SNDU in current TS cell. */
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/* Synchronize continuity counter. */
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priv->tscc = ts[3] & 0x0F;
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/* There is a pointer field here. */
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if (ts[4] > ts_remain) {
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printk(KERN_ERR "%lu: Invalid ULE packet "
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"(pointer field %d)\n", priv->ts_count, ts[4]);
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ts += TS_SZ;
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priv->ts_count++;
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continue;
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}
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/* Skip to destination of pointer field. */
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from_where = &ts[5] + ts[4];
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ts_remain -= 1 + ts[4];
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skipped = 0;
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} else {
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skipped++;
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ts += TS_SZ;
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priv->ts_count++;
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continue;
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}
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}
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if (new_ts) {
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/* Check continuity counter. */
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if ((ts[3] & 0x0F) == priv->tscc)
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priv->tscc = (priv->tscc + 1) & 0x0F;
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else {
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/* TS discontinuity handling: */
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printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
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"expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
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/* Drop partly decoded SNDU, reset state, resync on PUSI. */
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if (priv->ule_skb) {
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dev_kfree_skb( priv->ule_skb );
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/* Prepare for next SNDU. */
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// reset_ule(priv); moved to below.
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dev->stats.rx_errors++;
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dev->stats.rx_frame_errors++;
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}
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reset_ule(priv);
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/* skip to next PUSI. */
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priv->need_pusi = 1;
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continue;
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}
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/* If we still have an incomplete payload, but PUSI is
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* set; some TS cells are missing.
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* This is only possible here, if we missed exactly 16 TS
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* cells (continuity counter wrap). */
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if (ts[1] & TS_PUSI) {
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if (! priv->need_pusi) {
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if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
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/* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
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printk(KERN_WARNING "%lu: Invalid pointer "
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"field: %u.\n", priv->ts_count, *from_where);
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/* Drop partly decoded SNDU, reset state, resync on PUSI. */
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if (priv->ule_skb) {
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error = true;
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dev_kfree_skb(priv->ule_skb);
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}
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if (error || priv->ule_sndu_remain) {
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dev->stats.rx_errors++;
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dev->stats.rx_frame_errors++;
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error = false;
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}
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reset_ule(priv);
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priv->need_pusi = 1;
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continue;
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}
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/* Skip pointer field (we're processing a
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* packed payload). */
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from_where += 1;
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ts_remain -= 1;
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} else
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priv->need_pusi = 0;
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if (priv->ule_sndu_remain > 183) {
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/* Current SNDU lacks more data than there could be available in the
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* current TS cell. */
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dev->stats.rx_errors++;
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dev->stats.rx_length_errors++;
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printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
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"got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
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priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
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dev_kfree_skb(priv->ule_skb);
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/* Prepare for next SNDU. */
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|
reset_ule(priv);
|
|
/* Resync: go to where pointer field points to: start of next ULE SNDU. */
|
|
from_where += ts[4];
|
|
ts_remain -= ts[4];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if new payload needs to be started. */
|
|
if (priv->ule_skb == NULL) {
|
|
/* Start a new payload with skb.
|
|
* Find ULE header. It is only guaranteed that the
|
|
* length field (2 bytes) is contained in the current
|
|
* TS.
|
|
* Check ts_remain has to be >= 2 here. */
|
|
if (ts_remain < 2) {
|
|
printk(KERN_WARNING "Invalid payload packing: only %d "
|
|
"bytes left in TS. Resyncing.\n", ts_remain);
|
|
priv->ule_sndu_len = 0;
|
|
priv->need_pusi = 1;
|
|
ts += TS_SZ;
|
|
continue;
|
|
}
|
|
|
|
if (! priv->ule_sndu_len) {
|
|
/* Got at least two bytes, thus extrace the SNDU length. */
|
|
priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
|
|
if (priv->ule_sndu_len & 0x8000) {
|
|
/* D-Bit is set: no dest mac present. */
|
|
priv->ule_sndu_len &= 0x7FFF;
|
|
priv->ule_dbit = 1;
|
|
} else
|
|
priv->ule_dbit = 0;
|
|
|
|
if (priv->ule_sndu_len < 5) {
|
|
printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
|
|
"Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
|
|
dev->stats.rx_errors++;
|
|
dev->stats.rx_length_errors++;
|
|
priv->ule_sndu_len = 0;
|
|
priv->need_pusi = 1;
|
|
new_ts = 1;
|
|
ts += TS_SZ;
|
|
priv->ts_count++;
|
|
continue;
|
|
}
|
|
ts_remain -= 2; /* consume the 2 bytes SNDU length. */
|
|
from_where += 2;
|
|
}
|
|
|
|
priv->ule_sndu_remain = priv->ule_sndu_len + 2;
|
|
/*
|
|
* State of current TS:
|
|
* ts_remain (remaining bytes in the current TS cell)
|
|
* 0 ule_type is not available now, we need the next TS cell
|
|
* 1 the first byte of the ule_type is present
|
|
* >=2 full ULE header present, maybe some payload data as well.
|
|
*/
|
|
switch (ts_remain) {
|
|
case 1:
|
|
priv->ule_sndu_remain--;
|
|
priv->ule_sndu_type = from_where[0] << 8;
|
|
priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
|
|
ts_remain -= 1; from_where += 1;
|
|
/* Continue w/ next TS. */
|
|
case 0:
|
|
new_ts = 1;
|
|
ts += TS_SZ;
|
|
priv->ts_count++;
|
|
continue;
|
|
|
|
default: /* complete ULE header is present in current TS. */
|
|
/* Extract ULE type field. */
|
|
if (priv->ule_sndu_type_1) {
|
|
priv->ule_sndu_type_1 = 0;
|
|
priv->ule_sndu_type |= from_where[0];
|
|
from_where += 1; /* points to payload start. */
|
|
ts_remain -= 1;
|
|
} else {
|
|
/* Complete type is present in new TS. */
|
|
priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
|
|
from_where += 2; /* points to payload start. */
|
|
ts_remain -= 2;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Allocate the skb (decoder target buffer) with the correct size, as follows:
|
|
* prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
|
|
priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
|
|
if (priv->ule_skb == NULL) {
|
|
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
|
|
dev->name);
|
|
dev->stats.rx_dropped++;
|
|
return;
|
|
}
|
|
|
|
/* This includes the CRC32 _and_ dest mac, if !dbit. */
|
|
priv->ule_sndu_remain = priv->ule_sndu_len;
|
|
priv->ule_skb->dev = dev;
|
|
/* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
|
|
skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
|
|
}
|
|
|
|
/* Copy data into our current skb. */
|
|
how_much = min(priv->ule_sndu_remain, (int)ts_remain);
|
|
memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
|
|
priv->ule_sndu_remain -= how_much;
|
|
ts_remain -= how_much;
|
|
from_where += how_much;
|
|
|
|
/* Check for complete payload. */
|
|
if (priv->ule_sndu_remain <= 0) {
|
|
/* Check CRC32, we've got it in our skb already. */
|
|
__be16 ulen = htons(priv->ule_sndu_len);
|
|
__be16 utype = htons(priv->ule_sndu_type);
|
|
const u8 *tail;
|
|
struct kvec iov[3] = {
|
|
{ &ulen, sizeof ulen },
|
|
{ &utype, sizeof utype },
|
|
{ priv->ule_skb->data, priv->ule_skb->len - 4 }
|
|
};
|
|
u32 ule_crc = ~0L, expected_crc;
|
|
if (priv->ule_dbit) {
|
|
/* Set D-bit for CRC32 verification,
|
|
* if it was set originally. */
|
|
ulen |= htons(0x8000);
|
|
}
|
|
|
|
ule_crc = iov_crc32(ule_crc, iov, 3);
|
|
tail = skb_tail_pointer(priv->ule_skb);
|
|
expected_crc = *(tail - 4) << 24 |
|
|
*(tail - 3) << 16 |
|
|
*(tail - 2) << 8 |
|
|
*(tail - 1);
|
|
if (ule_crc != expected_crc) {
|
|
printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
|
|
priv->ts_count, ule_crc, expected_crc, priv->ule_sndu_len, priv->ule_sndu_type, ts_remain, ts_remain > 2 ? *(unsigned short *)from_where : 0);
|
|
|
|
#ifdef ULE_DEBUG
|
|
hexdump( iov[0].iov_base, iov[0].iov_len );
|
|
hexdump( iov[1].iov_base, iov[1].iov_len );
|
|
hexdump( iov[2].iov_base, iov[2].iov_len );
|
|
|
|
if (ule_where == ule_hist) {
|
|
hexdump( &ule_hist[98*TS_SZ], TS_SZ );
|
|
hexdump( &ule_hist[99*TS_SZ], TS_SZ );
|
|
} else if (ule_where == &ule_hist[TS_SZ]) {
|
|
hexdump( &ule_hist[99*TS_SZ], TS_SZ );
|
|
hexdump( ule_hist, TS_SZ );
|
|
} else {
|
|
hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
|
|
hexdump( ule_where - TS_SZ, TS_SZ );
|
|
}
|
|
ule_dump = 1;
|
|
#endif
|
|
|
|
dev->stats.rx_errors++;
|
|
dev->stats.rx_crc_errors++;
|
|
dev_kfree_skb(priv->ule_skb);
|
|
} else {
|
|
/* CRC32 verified OK. */
|
|
u8 dest_addr[ETH_ALEN];
|
|
static const u8 bc_addr[ETH_ALEN] =
|
|
{ [ 0 ... ETH_ALEN-1] = 0xff };
|
|
|
|
/* CRC32 was OK. Remove it from skb. */
|
|
priv->ule_skb->tail -= 4;
|
|
priv->ule_skb->len -= 4;
|
|
|
|
if (!priv->ule_dbit) {
|
|
/*
|
|
* The destination MAC address is the
|
|
* next data in the skb. It comes
|
|
* before any extension headers.
|
|
*
|
|
* Check if the payload of this SNDU
|
|
* should be passed up the stack.
|
|
*/
|
|
register int drop = 0;
|
|
if (priv->rx_mode != RX_MODE_PROMISC) {
|
|
if (priv->ule_skb->data[0] & 0x01) {
|
|
/* multicast or broadcast */
|
|
if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) {
|
|
/* multicast */
|
|
if (priv->rx_mode == RX_MODE_MULTI) {
|
|
int i;
|
|
for(i = 0; i < priv->multi_num &&
|
|
!ether_addr_equal(priv->ule_skb->data,
|
|
priv->multi_macs[i]); i++)
|
|
;
|
|
if (i == priv->multi_num)
|
|
drop = 1;
|
|
} else if (priv->rx_mode != RX_MODE_ALL_MULTI)
|
|
drop = 1; /* no broadcast; */
|
|
/* else: all multicast mode: accept all multicast packets */
|
|
}
|
|
/* else: broadcast */
|
|
}
|
|
else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr))
|
|
drop = 1;
|
|
/* else: destination address matches the MAC address of our receiver device */
|
|
}
|
|
/* else: promiscuous mode; pass everything up the stack */
|
|
|
|
if (drop) {
|
|
#ifdef ULE_DEBUG
|
|
netdev_dbg(dev, "Dropping SNDU: MAC destination address does not match: dest addr: %pM, dev addr: %pM\n",
|
|
priv->ule_skb->data, dev->dev_addr);
|
|
#endif
|
|
dev_kfree_skb(priv->ule_skb);
|
|
goto sndu_done;
|
|
}
|
|
else
|
|
{
|
|
skb_copy_from_linear_data(priv->ule_skb,
|
|
dest_addr,
|
|
ETH_ALEN);
|
|
skb_pull(priv->ule_skb, ETH_ALEN);
|
|
}
|
|
}
|
|
|
|
/* Handle ULE Extension Headers. */
|
|
if (priv->ule_sndu_type < ETH_P_802_3_MIN) {
|
|
/* There is an extension header. Handle it accordingly. */
|
|
int l = handle_ule_extensions(priv);
|
|
if (l < 0) {
|
|
/* Mandatory extension header unknown or TEST SNDU. Drop it. */
|
|
// printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
|
|
dev_kfree_skb(priv->ule_skb);
|
|
goto sndu_done;
|
|
}
|
|
skb_pull(priv->ule_skb, l);
|
|
}
|
|
|
|
/*
|
|
* Construct/assure correct ethernet header.
|
|
* Note: in bridged mode (priv->ule_bridged !=
|
|
* 0) we already have the (original) ethernet
|
|
* header at the start of the payload (after
|
|
* optional dest. address and any extension
|
|
* headers).
|
|
*/
|
|
|
|
if (!priv->ule_bridged) {
|
|
skb_push(priv->ule_skb, ETH_HLEN);
|
|
ethh = (struct ethhdr *)priv->ule_skb->data;
|
|
if (!priv->ule_dbit) {
|
|
/* dest_addr buffer is only valid if priv->ule_dbit == 0 */
|
|
memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
|
|
memset(ethh->h_source, 0, ETH_ALEN);
|
|
}
|
|
else /* zeroize source and dest */
|
|
memset( ethh, 0, ETH_ALEN*2 );
|
|
|
|
ethh->h_proto = htons(priv->ule_sndu_type);
|
|
}
|
|
/* else: skb is in correct state; nothing to do. */
|
|
priv->ule_bridged = 0;
|
|
|
|
/* Stuff into kernel's protocol stack. */
|
|
priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
|
|
/* If D-bit is set (i.e. destination MAC address not present),
|
|
* receive the packet anyhow. */
|
|
/* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
|
|
priv->ule_skb->pkt_type = PACKET_HOST; */
|
|
dev->stats.rx_packets++;
|
|
dev->stats.rx_bytes += priv->ule_skb->len;
|
|
netif_rx(priv->ule_skb);
|
|
}
|
|
sndu_done:
|
|
/* Prepare for next SNDU. */
|
|
reset_ule(priv);
|
|
}
|
|
|
|
/* More data in current TS (look at the bytes following the CRC32)? */
|
|
if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
|
|
/* Next ULE SNDU starts right there. */
|
|
new_ts = 0;
|
|
priv->ule_skb = NULL;
|
|
priv->ule_sndu_type_1 = 0;
|
|
priv->ule_sndu_len = 0;
|
|
// printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
|
|
// *(from_where + 0), *(from_where + 1),
|
|
// *(from_where + 2), *(from_where + 3));
|
|
// printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
|
|
// hexdump(ts, 188);
|
|
} else {
|
|
new_ts = 1;
|
|
ts += TS_SZ;
|
|
priv->ts_count++;
|
|
if (priv->ule_skb == NULL) {
|
|
priv->need_pusi = 1;
|
|
priv->ule_sndu_type_1 = 0;
|
|
priv->ule_sndu_len = 0;
|
|
}
|
|
}
|
|
} /* for all available TS cells */
|
|
}
|
|
|
|
static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
|
|
const u8 *buffer2, size_t buffer2_len,
|
|
struct dmx_ts_feed *feed, enum dmx_success success)
|
|
{
|
|
struct net_device *dev = feed->priv;
|
|
|
|
if (buffer2)
|
|
printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
|
|
if (buffer1_len > 32768)
|
|
printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
|
|
/* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
|
|
buffer1_len, buffer1_len / TS_SZ, buffer1); */
|
|
dvb_net_ule(dev, buffer1, buffer1_len);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void dvb_net_sec(struct net_device *dev,
|
|
const u8 *pkt, int pkt_len)
|
|
{
|
|
u8 *eth;
|
|
struct sk_buff *skb;
|
|
struct net_device_stats *stats = &dev->stats;
|
|
int snap = 0;
|
|
|
|
/* note: pkt_len includes a 32bit checksum */
|
|
if (pkt_len < 16) {
|
|
printk("%s: IP/MPE packet length = %d too small.\n",
|
|
dev->name, pkt_len);
|
|
stats->rx_errors++;
|
|
stats->rx_length_errors++;
|
|
return;
|
|
}
|
|
/* it seems some ISPs manage to screw up here, so we have to
|
|
* relax the error checks... */
|
|
#if 0
|
|
if ((pkt[5] & 0xfd) != 0xc1) {
|
|
/* drop scrambled or broken packets */
|
|
#else
|
|
if ((pkt[5] & 0x3c) != 0x00) {
|
|
/* drop scrambled */
|
|
#endif
|
|
stats->rx_errors++;
|
|
stats->rx_crc_errors++;
|
|
return;
|
|
}
|
|
if (pkt[5] & 0x02) {
|
|
/* handle LLC/SNAP, see rfc-1042 */
|
|
if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
|
|
stats->rx_dropped++;
|
|
return;
|
|
}
|
|
snap = 8;
|
|
}
|
|
if (pkt[7]) {
|
|
/* FIXME: assemble datagram from multiple sections */
|
|
stats->rx_errors++;
|
|
stats->rx_frame_errors++;
|
|
return;
|
|
}
|
|
|
|
/* we have 14 byte ethernet header (ip header follows);
|
|
* 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
|
|
*/
|
|
if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
|
|
//printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
|
|
stats->rx_dropped++;
|
|
return;
|
|
}
|
|
skb_reserve(skb, 2); /* longword align L3 header */
|
|
skb->dev = dev;
|
|
|
|
/* copy L3 payload */
|
|
eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
|
|
memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
|
|
|
|
/* create ethernet header: */
|
|
eth[0]=pkt[0x0b];
|
|
eth[1]=pkt[0x0a];
|
|
eth[2]=pkt[0x09];
|
|
eth[3]=pkt[0x08];
|
|
eth[4]=pkt[0x04];
|
|
eth[5]=pkt[0x03];
|
|
|
|
eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
|
|
|
|
if (snap) {
|
|
eth[12] = pkt[18];
|
|
eth[13] = pkt[19];
|
|
} else {
|
|
/* protocol numbers are from rfc-1700 or
|
|
* http://www.iana.org/assignments/ethernet-numbers
|
|
*/
|
|
if (pkt[12] >> 4 == 6) { /* version field from IP header */
|
|
eth[12] = 0x86; /* IPv6 */
|
|
eth[13] = 0xdd;
|
|
} else {
|
|
eth[12] = 0x08; /* IPv4 */
|
|
eth[13] = 0x00;
|
|
}
|
|
}
|
|
|
|
skb->protocol = dvb_net_eth_type_trans(skb, dev);
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes+=skb->len;
|
|
netif_rx(skb);
|
|
}
|
|
|
|
static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
|
|
const u8 *buffer2, size_t buffer2_len,
|
|
struct dmx_section_filter *filter,
|
|
enum dmx_success success)
|
|
{
|
|
struct net_device *dev = filter->priv;
|
|
|
|
/**
|
|
* we rely on the DVB API definition where exactly one complete
|
|
* section is delivered in buffer1
|
|
*/
|
|
dvb_net_sec (dev, buffer1, buffer1_len);
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
|
|
static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
|
|
static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
|
|
static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
|
|
|
|
static int dvb_net_filter_sec_set(struct net_device *dev,
|
|
struct dmx_section_filter **secfilter,
|
|
u8 *mac, u8 *mac_mask)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
int ret;
|
|
|
|
*secfilter=NULL;
|
|
ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
|
|
if (ret<0) {
|
|
printk("%s: could not get filter\n", dev->name);
|
|
return ret;
|
|
}
|
|
|
|
(*secfilter)->priv=(void *) dev;
|
|
|
|
memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
|
|
memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
|
|
memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
|
|
|
|
(*secfilter)->filter_value[0]=0x3e;
|
|
(*secfilter)->filter_value[3]=mac[5];
|
|
(*secfilter)->filter_value[4]=mac[4];
|
|
(*secfilter)->filter_value[8]=mac[3];
|
|
(*secfilter)->filter_value[9]=mac[2];
|
|
(*secfilter)->filter_value[10]=mac[1];
|
|
(*secfilter)->filter_value[11]=mac[0];
|
|
|
|
(*secfilter)->filter_mask[0] = 0xff;
|
|
(*secfilter)->filter_mask[3] = mac_mask[5];
|
|
(*secfilter)->filter_mask[4] = mac_mask[4];
|
|
(*secfilter)->filter_mask[8] = mac_mask[3];
|
|
(*secfilter)->filter_mask[9] = mac_mask[2];
|
|
(*secfilter)->filter_mask[10] = mac_mask[1];
|
|
(*secfilter)->filter_mask[11]=mac_mask[0];
|
|
|
|
netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_net_feed_start(struct net_device *dev)
|
|
{
|
|
int ret = 0, i;
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
struct dmx_demux *demux = priv->demux;
|
|
unsigned char *mac = (unsigned char *) dev->dev_addr;
|
|
|
|
netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode);
|
|
mutex_lock(&priv->mutex);
|
|
if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
|
|
printk("%s: BUG %d\n", __func__, __LINE__);
|
|
|
|
priv->secfeed=NULL;
|
|
priv->secfilter=NULL;
|
|
priv->tsfeed = NULL;
|
|
|
|
if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
|
|
netdev_dbg(dev, "alloc secfeed\n");
|
|
ret=demux->allocate_section_feed(demux, &priv->secfeed,
|
|
dvb_net_sec_callback);
|
|
if (ret<0) {
|
|
printk("%s: could not allocate section feed\n", dev->name);
|
|
goto error;
|
|
}
|
|
|
|
ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
|
|
|
|
if (ret<0) {
|
|
printk("%s: could not set section feed\n", dev->name);
|
|
priv->demux->release_section_feed(priv->demux, priv->secfeed);
|
|
priv->secfeed=NULL;
|
|
goto error;
|
|
}
|
|
|
|
if (priv->rx_mode != RX_MODE_PROMISC) {
|
|
netdev_dbg(dev, "set secfilter\n");
|
|
dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
|
|
}
|
|
|
|
switch (priv->rx_mode) {
|
|
case RX_MODE_MULTI:
|
|
for (i = 0; i < priv->multi_num; i++) {
|
|
netdev_dbg(dev, "set multi_secfilter[%d]\n", i);
|
|
dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
|
|
priv->multi_macs[i], mask_normal);
|
|
}
|
|
break;
|
|
case RX_MODE_ALL_MULTI:
|
|
priv->multi_num=1;
|
|
netdev_dbg(dev, "set multi_secfilter[0]\n");
|
|
dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
|
|
mac_allmulti, mask_allmulti);
|
|
break;
|
|
case RX_MODE_PROMISC:
|
|
priv->multi_num=0;
|
|
netdev_dbg(dev, "set secfilter\n");
|
|
dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
|
|
break;
|
|
}
|
|
|
|
netdev_dbg(dev, "start filtering\n");
|
|
priv->secfeed->start_filtering(priv->secfeed);
|
|
} else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
|
|
struct timespec timeout = { 0, 10000000 }; // 10 msec
|
|
|
|
/* we have payloads encapsulated in TS */
|
|
netdev_dbg(dev, "alloc tsfeed\n");
|
|
ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
|
|
if (ret < 0) {
|
|
printk("%s: could not allocate ts feed\n", dev->name);
|
|
goto error;
|
|
}
|
|
|
|
/* Set netdevice pointer for ts decaps callback. */
|
|
priv->tsfeed->priv = (void *)dev;
|
|
ret = priv->tsfeed->set(priv->tsfeed,
|
|
priv->pid, /* pid */
|
|
TS_PACKET, /* type */
|
|
DMX_PES_OTHER, /* pes type */
|
|
32768, /* circular buffer size */
|
|
timeout /* timeout */
|
|
);
|
|
|
|
if (ret < 0) {
|
|
printk("%s: could not set ts feed\n", dev->name);
|
|
priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
|
|
priv->tsfeed = NULL;
|
|
goto error;
|
|
}
|
|
|
|
netdev_dbg(dev, "start filtering\n");
|
|
priv->tsfeed->start_filtering(priv->tsfeed);
|
|
} else
|
|
ret = -EINVAL;
|
|
|
|
error:
|
|
mutex_unlock(&priv->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int dvb_net_feed_stop(struct net_device *dev)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
int i, ret = 0;
|
|
|
|
mutex_lock(&priv->mutex);
|
|
if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
|
|
if (priv->secfeed) {
|
|
if (priv->secfeed->is_filtering) {
|
|
netdev_dbg(dev, "stop secfeed\n");
|
|
priv->secfeed->stop_filtering(priv->secfeed);
|
|
}
|
|
|
|
if (priv->secfilter) {
|
|
netdev_dbg(dev, "release secfilter\n");
|
|
priv->secfeed->release_filter(priv->secfeed,
|
|
priv->secfilter);
|
|
priv->secfilter=NULL;
|
|
}
|
|
|
|
for (i=0; i<priv->multi_num; i++) {
|
|
if (priv->multi_secfilter[i]) {
|
|
netdev_dbg(dev, "release multi_filter[%d]\n",
|
|
i);
|
|
priv->secfeed->release_filter(priv->secfeed,
|
|
priv->multi_secfilter[i]);
|
|
priv->multi_secfilter[i] = NULL;
|
|
}
|
|
}
|
|
|
|
priv->demux->release_section_feed(priv->demux, priv->secfeed);
|
|
priv->secfeed = NULL;
|
|
} else
|
|
printk("%s: no feed to stop\n", dev->name);
|
|
} else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
|
|
if (priv->tsfeed) {
|
|
if (priv->tsfeed->is_filtering) {
|
|
netdev_dbg(dev, "stop tsfeed\n");
|
|
priv->tsfeed->stop_filtering(priv->tsfeed);
|
|
}
|
|
priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
|
|
priv->tsfeed = NULL;
|
|
}
|
|
else
|
|
printk("%s: no ts feed to stop\n", dev->name);
|
|
} else
|
|
ret = -EINVAL;
|
|
mutex_unlock(&priv->mutex);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
|
|
if (priv->multi_num == DVB_NET_MULTICAST_MAX)
|
|
return -ENOMEM;
|
|
|
|
memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
|
|
|
|
priv->multi_num++;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void wq_set_multicast_list (struct work_struct *work)
|
|
{
|
|
struct dvb_net_priv *priv =
|
|
container_of(work, struct dvb_net_priv, set_multicast_list_wq);
|
|
struct net_device *dev = priv->net;
|
|
|
|
dvb_net_feed_stop(dev);
|
|
priv->rx_mode = RX_MODE_UNI;
|
|
netif_addr_lock_bh(dev);
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
netdev_dbg(dev, "promiscuous mode\n");
|
|
priv->rx_mode = RX_MODE_PROMISC;
|
|
} else if ((dev->flags & IFF_ALLMULTI)) {
|
|
netdev_dbg(dev, "allmulti mode\n");
|
|
priv->rx_mode = RX_MODE_ALL_MULTI;
|
|
} else if (!netdev_mc_empty(dev)) {
|
|
struct netdev_hw_addr *ha;
|
|
|
|
netdev_dbg(dev, "set_mc_list, %d entries\n",
|
|
netdev_mc_count(dev));
|
|
|
|
priv->rx_mode = RX_MODE_MULTI;
|
|
priv->multi_num = 0;
|
|
|
|
netdev_for_each_mc_addr(ha, dev)
|
|
dvb_set_mc_filter(dev, ha->addr);
|
|
}
|
|
|
|
netif_addr_unlock_bh(dev);
|
|
dvb_net_feed_start(dev);
|
|
}
|
|
|
|
|
|
static void dvb_net_set_multicast_list (struct net_device *dev)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
schedule_work(&priv->set_multicast_list_wq);
|
|
}
|
|
|
|
|
|
static void wq_restart_net_feed (struct work_struct *work)
|
|
{
|
|
struct dvb_net_priv *priv =
|
|
container_of(work, struct dvb_net_priv, restart_net_feed_wq);
|
|
struct net_device *dev = priv->net;
|
|
|
|
if (netif_running(dev)) {
|
|
dvb_net_feed_stop(dev);
|
|
dvb_net_feed_start(dev);
|
|
}
|
|
}
|
|
|
|
|
|
static int dvb_net_set_mac (struct net_device *dev, void *p)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
struct sockaddr *addr=p;
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
|
|
|
|
if (netif_running(dev))
|
|
schedule_work(&priv->restart_net_feed_wq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int dvb_net_open(struct net_device *dev)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
|
|
priv->in_use++;
|
|
dvb_net_feed_start(dev);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int dvb_net_stop(struct net_device *dev)
|
|
{
|
|
struct dvb_net_priv *priv = netdev_priv(dev);
|
|
|
|
priv->in_use--;
|
|
return dvb_net_feed_stop(dev);
|
|
}
|
|
|
|
static const struct header_ops dvb_header_ops = {
|
|
.create = eth_header,
|
|
.parse = eth_header_parse,
|
|
.rebuild = eth_rebuild_header,
|
|
};
|
|
|
|
|
|
static const struct net_device_ops dvb_netdev_ops = {
|
|
.ndo_open = dvb_net_open,
|
|
.ndo_stop = dvb_net_stop,
|
|
.ndo_start_xmit = dvb_net_tx,
|
|
.ndo_set_rx_mode = dvb_net_set_multicast_list,
|
|
.ndo_set_mac_address = dvb_net_set_mac,
|
|
.ndo_change_mtu = eth_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
static void dvb_net_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->header_ops = &dvb_header_ops;
|
|
dev->netdev_ops = &dvb_netdev_ops;
|
|
dev->mtu = 4096;
|
|
|
|
dev->flags |= IFF_NOARP;
|
|
}
|
|
|
|
static int get_if(struct dvb_net *dvbnet)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<DVB_NET_DEVICES_MAX; i++)
|
|
if (!dvbnet->state[i])
|
|
break;
|
|
|
|
if (i == DVB_NET_DEVICES_MAX)
|
|
return -1;
|
|
|
|
dvbnet->state[i]=1;
|
|
return i;
|
|
}
|
|
|
|
static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
|
|
{
|
|
struct net_device *net;
|
|
struct dvb_net_priv *priv;
|
|
int result;
|
|
int if_num;
|
|
|
|
if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
|
|
return -EINVAL;
|
|
if ((if_num = get_if(dvbnet)) < 0)
|
|
return -EINVAL;
|
|
|
|
net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
|
|
NET_NAME_UNKNOWN, dvb_net_setup);
|
|
if (!net)
|
|
return -ENOMEM;
|
|
|
|
if (dvbnet->dvbdev->id)
|
|
snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
|
|
dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
|
|
else
|
|
/* compatibility fix to keep dvb0_0 format */
|
|
snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
|
|
dvbnet->dvbdev->adapter->num, if_num);
|
|
|
|
net->addr_len = 6;
|
|
memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
|
|
|
|
dvbnet->device[if_num] = net;
|
|
|
|
priv = netdev_priv(net);
|
|
priv->net = net;
|
|
priv->demux = dvbnet->demux;
|
|
priv->pid = pid;
|
|
priv->rx_mode = RX_MODE_UNI;
|
|
priv->need_pusi = 1;
|
|
priv->tscc = 0;
|
|
priv->feedtype = feedtype;
|
|
reset_ule(priv);
|
|
|
|
INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
|
|
INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
|
|
mutex_init(&priv->mutex);
|
|
|
|
net->base_addr = pid;
|
|
|
|
if ((result = register_netdev(net)) < 0) {
|
|
dvbnet->device[if_num] = NULL;
|
|
free_netdev(net);
|
|
return result;
|
|
}
|
|
printk("dvb_net: created network interface %s\n", net->name);
|
|
|
|
return if_num;
|
|
}
|
|
|
|
static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
|
|
{
|
|
struct net_device *net = dvbnet->device[num];
|
|
struct dvb_net_priv *priv;
|
|
|
|
if (!dvbnet->state[num])
|
|
return -EINVAL;
|
|
priv = netdev_priv(net);
|
|
if (priv->in_use)
|
|
return -EBUSY;
|
|
|
|
dvb_net_stop(net);
|
|
flush_work(&priv->set_multicast_list_wq);
|
|
flush_work(&priv->restart_net_feed_wq);
|
|
printk("dvb_net: removed network interface %s\n", net->name);
|
|
unregister_netdev(net);
|
|
dvbnet->state[num]=0;
|
|
dvbnet->device[num] = NULL;
|
|
free_netdev(net);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_net_do_ioctl(struct file *file,
|
|
unsigned int cmd, void *parg)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_net *dvbnet = dvbdev->priv;
|
|
int ret = 0;
|
|
|
|
if (((file->f_flags&O_ACCMODE)==O_RDONLY))
|
|
return -EPERM;
|
|
|
|
if (mutex_lock_interruptible(&dvbnet->ioctl_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
switch (cmd) {
|
|
case NET_ADD_IF:
|
|
{
|
|
struct dvb_net_if *dvbnetif = parg;
|
|
int result;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
ret = -EPERM;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
if (!try_module_get(dvbdev->adapter->module)) {
|
|
ret = -EPERM;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
|
|
if (result<0) {
|
|
module_put(dvbdev->adapter->module);
|
|
ret = result;
|
|
goto ioctl_error;
|
|
}
|
|
dvbnetif->if_num=result;
|
|
break;
|
|
}
|
|
case NET_GET_IF:
|
|
{
|
|
struct net_device *netdev;
|
|
struct dvb_net_priv *priv_data;
|
|
struct dvb_net_if *dvbnetif = parg;
|
|
|
|
if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
|
|
!dvbnet->state[dvbnetif->if_num]) {
|
|
ret = -EINVAL;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
netdev = dvbnet->device[dvbnetif->if_num];
|
|
|
|
priv_data = netdev_priv(netdev);
|
|
dvbnetif->pid=priv_data->pid;
|
|
dvbnetif->feedtype=priv_data->feedtype;
|
|
break;
|
|
}
|
|
case NET_REMOVE_IF:
|
|
{
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
ret = -EPERM;
|
|
goto ioctl_error;
|
|
}
|
|
if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) {
|
|
ret = -EINVAL;
|
|
goto ioctl_error;
|
|
}
|
|
ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
|
|
if (!ret)
|
|
module_put(dvbdev->adapter->module);
|
|
break;
|
|
}
|
|
|
|
/* binary compatibility cruft */
|
|
case __NET_ADD_IF_OLD:
|
|
{
|
|
struct __dvb_net_if_old *dvbnetif = parg;
|
|
int result;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
ret = -EPERM;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
if (!try_module_get(dvbdev->adapter->module)) {
|
|
ret = -EPERM;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
|
|
if (result<0) {
|
|
module_put(dvbdev->adapter->module);
|
|
ret = result;
|
|
goto ioctl_error;
|
|
}
|
|
dvbnetif->if_num=result;
|
|
break;
|
|
}
|
|
case __NET_GET_IF_OLD:
|
|
{
|
|
struct net_device *netdev;
|
|
struct dvb_net_priv *priv_data;
|
|
struct __dvb_net_if_old *dvbnetif = parg;
|
|
|
|
if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
|
|
!dvbnet->state[dvbnetif->if_num]) {
|
|
ret = -EINVAL;
|
|
goto ioctl_error;
|
|
}
|
|
|
|
netdev = dvbnet->device[dvbnetif->if_num];
|
|
|
|
priv_data = netdev_priv(netdev);
|
|
dvbnetif->pid=priv_data->pid;
|
|
break;
|
|
}
|
|
default:
|
|
ret = -ENOTTY;
|
|
break;
|
|
}
|
|
|
|
ioctl_error:
|
|
mutex_unlock(&dvbnet->ioctl_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static long dvb_net_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
|
|
}
|
|
|
|
static int dvb_net_close(struct inode *inode, struct file *file)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_net *dvbnet = dvbdev->priv;
|
|
|
|
dvb_generic_release(inode, file);
|
|
|
|
if(dvbdev->users == 1 && dvbnet->exit == 1)
|
|
wake_up(&dvbdev->wait_queue);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct file_operations dvb_net_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = dvb_net_ioctl,
|
|
.open = dvb_generic_open,
|
|
.release = dvb_net_close,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct dvb_device dvbdev_net = {
|
|
.priv = NULL,
|
|
.users = 1,
|
|
.writers = 1,
|
|
.fops = &dvb_net_fops,
|
|
};
|
|
|
|
|
|
void dvb_net_release (struct dvb_net *dvbnet)
|
|
{
|
|
int i;
|
|
|
|
dvbnet->exit = 1;
|
|
if (dvbnet->dvbdev->users < 1)
|
|
wait_event(dvbnet->dvbdev->wait_queue,
|
|
dvbnet->dvbdev->users==1);
|
|
|
|
dvb_unregister_device(dvbnet->dvbdev);
|
|
|
|
for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
|
|
if (!dvbnet->state[i])
|
|
continue;
|
|
dvb_net_remove_if(dvbnet, i);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(dvb_net_release);
|
|
|
|
|
|
int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
|
|
struct dmx_demux *dmx)
|
|
{
|
|
int i;
|
|
|
|
mutex_init(&dvbnet->ioctl_mutex);
|
|
dvbnet->demux = dmx;
|
|
|
|
for (i=0; i<DVB_NET_DEVICES_MAX; i++)
|
|
dvbnet->state[i] = 0;
|
|
|
|
return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
|
|
dvbnet, DVB_DEVICE_NET);
|
|
}
|
|
EXPORT_SYMBOL(dvb_net_init);
|