--- /dev/null
+/*
+ * dvb_net.c
+ *
+ * Copyright (C) 2001 Convergence integrated media GmbH
+ * Ralph Metzler <ralph@convergence.de>
+ * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
+ *
+ * ULE Decapsulation code:
+ * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
+ * and Department of Scientific Computing
+ * Paris Lodron University of Salzburg.
+ * Hilmar Linder <hlinder@cosy.sbg.ac.at>
+ * and Wolfram Stering <wstering@cosy.sbg.ac.at>
+ *
+ * ULE Decaps according to RFC 4326.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*
+ * ULE ChangeLog:
+ * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
+ *
+ * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
+ * ULE Extension header handling.
+ * Bugreports by Moritz Vieth and Hanno Tersteegen,
+ * Fraunhofer Institute for Open Communication Systems
+ * Competence Center for Advanced Satellite Communications.
+ * Bugfixes and robustness improvements.
+ * Filtering on dest MAC addresses, if present (D-Bit = 0)
+ * ULE_DEBUG compile-time option.
+ * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by
+ * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
+ * Paris Lodron University of Salzburg.
+ */
+
+/*
+ * FIXME / TODO (dvb_net.c):
+ *
+ * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/dvb/net.h>
+#include <linux/uio.h>
+#include <asm/uaccess.h>
+#include <linux/crc32.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+
+#include "dvb_demux.h"
+#include "dvb_net.h"
+
+static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
+{
+ unsigned int j;
+ for (j = 0; j < cnt; j++)
+ c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
+ return c;
+}
+
+
+#define DVB_NET_MULTICAST_MAX 10
+
+#undef ULE_DEBUG
+
+#ifdef ULE_DEBUG
+
+static void hexdump(const unsigned char *buf, unsigned short len)
+{
+ print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
+}
+
+#endif
+
+struct dvb_net_priv {
+ int in_use;
+ u16 pid;
+ struct net_device *net;
+ struct dvb_net *host;
+ struct dmx_demux *demux;
+ struct dmx_section_feed *secfeed;
+ struct dmx_section_filter *secfilter;
+ struct dmx_ts_feed *tsfeed;
+ int multi_num;
+ struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
+ unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
+ int rx_mode;
+#define RX_MODE_UNI 0
+#define RX_MODE_MULTI 1
+#define RX_MODE_ALL_MULTI 2
+#define RX_MODE_PROMISC 3
+ struct work_struct set_multicast_list_wq;
+ struct work_struct restart_net_feed_wq;
+ unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
+ int need_pusi; /* Set to 1, if synchronization on PUSI required. */
+ unsigned char tscc; /* TS continuity counter after sync on PUSI. */
+ struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
+ unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
+ unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
+ unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
+ unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
+ unsigned char ule_dbit; /* Whether the DestMAC address present
+ * or not (bit is set). */
+ unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
+ int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
+ unsigned long ts_count; /* Current ts cell counter. */
+ struct mutex mutex;
+};
+
+
+/**
+ * Determine the packet's protocol ID. The rule here is that we
+ * assume 802.3 if the type field is short enough to be a length.
+ * This is normal practice and works for any 'now in use' protocol.
+ *
+ * stolen from eth.c out of the linux kernel, hacked for dvb-device
+ * by Michael Holzt <kju@debian.org>
+ */
+static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ethhdr *eth;
+ unsigned char *rawp;
+
+ skb_reset_mac_header(skb);
+ skb_pull(skb,dev->hard_header_len);
+ eth = eth_hdr(skb);
+
+ if (*eth->h_dest & 1) {
+ if(ether_addr_equal(eth->h_dest,dev->broadcast))
+ skb->pkt_type=PACKET_BROADCAST;
+ else
+ skb->pkt_type=PACKET_MULTICAST;
+ }
+
+ if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
+ return eth->h_proto;
+
+ rawp = skb->data;
+
+ /**
+ * This is a magic hack to spot IPX packets. Older Novell breaks
+ * the protocol design and runs IPX over 802.3 without an 802.2 LLC
+ * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
+ * won't work for fault tolerant netware but does for the rest.
+ */
+ if (*(unsigned short *)rawp == 0xFFFF)
+ return htons(ETH_P_802_3);
+
+ /**
+ * Real 802.2 LLC
+ */
+ return htons(ETH_P_802_2);
+}
+
+#define TS_SZ 188
+#define TS_SYNC 0x47
+#define TS_TEI 0x80
+#define TS_SC 0xC0
+#define TS_PUSI 0x40
+#define TS_AF_A 0x20
+#define TS_AF_D 0x10
+
+/* ULE Extension Header handlers. */
+
+#define ULE_TEST 0
+#define ULE_BRIDGED 1
+
+#define ULE_OPTEXTHDR_PADDING 0
+
+static int ule_test_sndu( struct dvb_net_priv *p )
+{
+ return -1;
+}
+
+static int ule_bridged_sndu( struct dvb_net_priv *p )
+{
+ struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
+ if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) {
+ int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
+ /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */
+ if(framelen != ntohs(hdr->h_proto)) {
+ return -1;
+ }
+ }
+ /* Note:
+ * From RFC4326:
+ * "A bridged SNDU is a Mandatory Extension Header of Type 1.
+ * It must be the final (or only) extension header specified in the header chain of a SNDU."
+ * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
+ */
+ p->ule_bridged = 1;
+ return 0;
+}
+
+static int ule_exthdr_padding(struct dvb_net_priv *p)
+{
+ return 0;
+}
+
+/** Handle ULE extension headers.
+ * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
+ * Returns: >= 0: nr. of bytes consumed by next extension header
+ * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
+ */
+static int handle_one_ule_extension( struct dvb_net_priv *p )
+{
+ /* Table of mandatory extension header handlers. The header type is the index. */
+ static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
+ { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
+
+ /* Table of optional extension header handlers. The header type is the index. */
+ static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
+ { [0] = ule_exthdr_padding, [1] = NULL, };
+
+ int ext_len = 0;
+ unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
+ unsigned char htype = p->ule_sndu_type & 0x00FF;
+
+ /* Discriminate mandatory and optional extension headers. */
+ if (hlen == 0) {
+ /* Mandatory extension header */
+ if (ule_mandatory_ext_handlers[htype]) {
+ ext_len = ule_mandatory_ext_handlers[htype]( p );
+ if(ext_len >= 0) {
+ p->ule_next_hdr += ext_len;
+ if (!p->ule_bridged) {
+ p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
+ p->ule_next_hdr += 2;
+ } else {
+ p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
+ /* This assures the extension handling loop will terminate. */
+ }
+ }
+ // else: extension handler failed or SNDU should be discarded
+ } else
+ ext_len = -1; /* SNDU has to be discarded. */
+ } else {
+ /* Optional extension header. Calculate the length. */
+ ext_len = hlen << 1;
+ /* Process the optional extension header according to its type. */
+ if (ule_optional_ext_handlers[htype])
+ (void)ule_optional_ext_handlers[htype]( p );
+ p->ule_next_hdr += ext_len;
+ p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
+ /*
+ * note: the length of the next header type is included in the
+ * length of THIS optional extension header
+ */
+ }
+
+ return ext_len;
+}
+
+static int handle_ule_extensions( struct dvb_net_priv *p )
+{
+ int total_ext_len = 0, l;
+
+ p->ule_next_hdr = p->ule_skb->data;
+ do {
+ l = handle_one_ule_extension( p );
+ if (l < 0)
+ return l; /* Stop extension header processing and discard SNDU. */
+ total_ext_len += l;
+#ifdef ULE_DEBUG
+ pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n",
+ p->ule_next_hdr, (int)p->ule_sndu_type,
+ l, total_ext_len);
+#endif
+
+ } while (p->ule_sndu_type < ETH_P_802_3_MIN);
+
+ return total_ext_len;
+}
+
+
+/** Prepare for a new ULE SNDU: reset the decoder state. */
+static inline void reset_ule( struct dvb_net_priv *p )
+{
+ p->ule_skb = NULL;
+ p->ule_next_hdr = NULL;
+ p->ule_sndu_len = 0;
+ p->ule_sndu_type = 0;
+ p->ule_sndu_type_1 = 0;
+ p->ule_sndu_remain = 0;
+ p->ule_dbit = 0xFF;
+ p->ule_bridged = 0;
+}
+
+/**
+ * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
+ * TS cells of a single PID.
+ */
+static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
+{
+ struct dvb_net_priv *priv = netdev_priv(dev);
+ unsigned long skipped = 0L;
+ const u8 *ts, *ts_end, *from_where = NULL;
+ u8 ts_remain = 0, how_much = 0, new_ts = 1;
+ struct ethhdr *ethh = NULL;
+ bool error = false;
+
+#ifdef ULE_DEBUG
+ /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
+ static unsigned char ule_hist[100*TS_SZ];
+ static unsigned char *ule_where = ule_hist, ule_dump;
+#endif
+
+ /* For all TS cells in current buffer.
+ * Appearently, we are called for every single TS cell.
+ */
+ for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
+
+ if (new_ts) {
+ /* We are about to process a new TS cell. */
+
+#ifdef ULE_DEBUG
+ if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
+ memcpy( ule_where, ts, TS_SZ );
+ if (ule_dump) {
+ hexdump( ule_where, TS_SZ );
+ ule_dump = 0;
+ }
+ ule_where += TS_SZ;
+#endif
+
+ /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
+ if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
+ printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
+ priv->ts_count, ts[0],
+ (ts[1] & TS_TEI) >> 7,
+ (ts[3] & TS_SC) >> 6);
+
+ /* Drop partly decoded SNDU, reset state, resync on PUSI. */
+ if (priv->ule_skb) {
+ dev_kfree_skb( priv->ule_skb );
+ /* Prepare for next SNDU. */
+ dev->stats.rx_errors++;
+ dev->stats.rx_frame_errors++;
+ }
+ reset_ule(priv);
+ priv->need_pusi = 1;
+
+ /* Continue with next TS cell. */
+ ts += TS_SZ;
+ priv->ts_count++;
+ continue;
+ }
+
+ ts_remain = 184;
+ from_where = ts + 4;
+ }
+ /* Synchronize on PUSI, if required. */
+ if (priv->need_pusi) {
+ if (ts[1] & TS_PUSI) {
+ /* Find beginning of first ULE SNDU in current TS cell. */
+ /* Synchronize continuity counter. */
+ priv->tscc = ts[3] & 0x0F;
+ /* There is a pointer field here. */
+ if (ts[4] > ts_remain) {
+ printk(KERN_ERR "%lu: Invalid ULE packet "
+ "(pointer field %d)\n", priv->ts_count, ts[4]);
+ ts += TS_SZ;
+ priv->ts_count++;
+ continue;
+ }
+ /* Skip to destination of pointer field. */
+ from_where = &ts[5] + ts[4];
+ ts_remain -= 1 + ts[4];
+ skipped = 0;
+ } else {
+ skipped++;
+ ts += TS_SZ;
+ priv->ts_count++;
+ continue;
+ }
+ }
+
+ if (new_ts) {
+ /* Check continuity counter. */
+ if ((ts[3] & 0x0F) == priv->tscc)
+ priv->tscc = (priv->tscc + 1) & 0x0F;
+ else {
+ /* TS discontinuity handling: */
+ printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
+ "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
+ /* Drop partly decoded SNDU, reset state, resync on PUSI. */
+ if (priv->ule_skb) {
+ dev_kfree_skb( priv->ule_skb );
+ /* Prepare for next SNDU. */
+ // reset_ule(priv); moved to below.
+ dev->stats.rx_errors++;
+ dev->stats.rx_frame_errors++;
+ }
+ reset_ule(priv);
+ /* skip to next PUSI. */
+ priv->need_pusi = 1;
+ continue;
+ }
+ /* If we still have an incomplete payload, but PUSI is
+ * set; some TS cells are missing.
+ * This is only possible here, if we missed exactly 16 TS
+ * cells (continuity counter wrap). */
+ if (ts[1] & TS_PUSI) {
+ if (! priv->need_pusi) {
+ if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
+ /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
+ printk(KERN_WARNING "%lu: Invalid pointer "
+ "field: %u.\n", priv->ts_count, *from_where);
+
+ /* Drop partly decoded SNDU, reset state, resync on PUSI. */
+ if (priv->ule_skb) {
+ error = true;
+ dev_kfree_skb(priv->ule_skb);
+ }
+
+ if (error || priv->ule_sndu_remain) {
+ dev->stats.rx_errors++;
+ dev->stats.rx_frame_errors++;
+ error = false;
+ }
+
+ reset_ule(priv);
+ priv->need_pusi = 1;
+ continue;
+ }
+ /* Skip pointer field (we're processing a
+ * packed payload). */
+ from_where += 1;
+ ts_remain -= 1;
+ } else
+ priv->need_pusi = 0;
+
+ if (priv->ule_sndu_remain > 183) {
+ /* Current SNDU lacks more data than there could be available in the
+ * current TS cell. */
+ dev->stats.rx_errors++;
+ dev->stats.rx_length_errors++;
+ printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
+ "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
+ priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
+ dev_kfree_skb(priv->ule_skb);
+ /* Prepare for next SNDU. */
+ 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,
+};
+
+
+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 const struct dvb_device dvbdev_net = {
+ .priv = NULL,
+ .users = 1,
+ .writers = 1,
+#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
+ .name = "dvb-net",
+#endif
+ .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);
Code Review / kvmfornfv.git / blobdiff