diff options
Diffstat (limited to 'drivers/media/dvb-core/dvb_net.c')
| -rw-r--r-- | drivers/media/dvb-core/dvb_net.c | 1664 |
1 files changed, 1664 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c new file mode 100644 index 000000000..8bb8dd34c --- /dev/null +++ b/drivers/media/dvb-core/dvb_net.c @@ -0,0 +1,1664 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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. + */ + +/* + * 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) + * DVB_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. + * + */ + +#define pr_fmt(fmt) "dvb_net: " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/nospec.h> +#include <linux/etherdevice.h> +#include <linux/dvb/net.h> +#include <linux/uio.h> +#include <linux/uaccess.h> +#include <linux/crc32.h> +#include <linux/mutex.h> +#include <linux/sched.h> + +#include <media/dvb_demux.h> +#include <media/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 + +#ifdef DVB_ULE_DEBUG +/* + * The code inside DVB_ULE_DEBUG keeps a history of the + * last 100 TS cells processed. + */ +static unsigned char ule_hist[100*TS_SZ] = { 0 }; +static unsigned char *ule_where = ule_hist, ule_dump; + +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; + 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); + + } 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. + */ + +struct dvb_net_ule_handle { + struct net_device *dev; + struct dvb_net_priv *priv; + struct ethhdr *ethh; + const u8 *buf; + size_t buf_len; + unsigned long skipped; + const u8 *ts, *ts_end, *from_where; + u8 ts_remain, how_much, new_ts; + bool error; +}; + +static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h) +{ + /* We are about to process a new TS cell. */ + +#ifdef DVB_ULE_DEBUG + if (ule_where >= &ule_hist[100*TS_SZ]) + ule_where = ule_hist; + memcpy(ule_where, h->ts, TS_SZ); + if (ule_dump) { + hexdump(ule_where, TS_SZ); + ule_dump = 0; + } + ule_where += TS_SZ; +#endif + + /* + * Check TS h->error conditions: sync_byte, transport_error_indicator, + * scrambling_control . + */ + if ((h->ts[0] != TS_SYNC) || (h->ts[1] & TS_TEI) || + ((h->ts[3] & TS_SC) != 0)) { + pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", + h->priv->ts_count, h->ts[0], + (h->ts[1] & TS_TEI) >> 7, + (h->ts[3] & TS_SC) >> 6); + + /* Drop partly decoded SNDU, reset state, resync on PUSI. */ + if (h->priv->ule_skb) { + dev_kfree_skb(h->priv->ule_skb); + /* Prepare for next SNDU. */ + h->dev->stats.rx_errors++; + h->dev->stats.rx_frame_errors++; + } + reset_ule(h->priv); + h->priv->need_pusi = 1; + + /* Continue with next TS cell. */ + h->ts += TS_SZ; + h->priv->ts_count++; + return 1; + } + + h->ts_remain = 184; + h->from_where = h->ts + 4; + + return 0; +} + +static int dvb_net_ule_ts_pusi(struct dvb_net_ule_handle *h) +{ + if (h->ts[1] & TS_PUSI) { + /* Find beginning of first ULE SNDU in current TS cell. */ + /* Synchronize continuity counter. */ + h->priv->tscc = h->ts[3] & 0x0F; + /* There is a pointer field here. */ + if (h->ts[4] > h->ts_remain) { + pr_err("%lu: Invalid ULE packet (pointer field %d)\n", + h->priv->ts_count, h->ts[4]); + h->ts += TS_SZ; + h->priv->ts_count++; + return 1; + } + /* Skip to destination of pointer field. */ + h->from_where = &h->ts[5] + h->ts[4]; + h->ts_remain -= 1 + h->ts[4]; + h->skipped = 0; + } else { + h->skipped++; + h->ts += TS_SZ; + h->priv->ts_count++; + return 1; + } + + return 0; +} + +static int dvb_net_ule_new_ts(struct dvb_net_ule_handle *h) +{ + /* Check continuity counter. */ + if ((h->ts[3] & 0x0F) == h->priv->tscc) + h->priv->tscc = (h->priv->tscc + 1) & 0x0F; + else { + /* TS discontinuity handling: */ + pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n", + h->priv->ts_count, h->ts[3] & 0x0F, + h->priv->tscc); + /* Drop partly decoded SNDU, reset state, resync on PUSI. */ + if (h->priv->ule_skb) { + dev_kfree_skb(h->priv->ule_skb); + /* Prepare for next SNDU. */ + // reset_ule(h->priv); moved to below. + h->dev->stats.rx_errors++; + h->dev->stats.rx_frame_errors++; + } + reset_ule(h->priv); + /* skip to next PUSI. */ + h->priv->need_pusi = 1; + return 1; + } + /* + * 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 (h->ts[1] & TS_PUSI) { + if (!h->priv->need_pusi) { + if (!(*h->from_where < (h->ts_remain-1)) || + *h->from_where != h->priv->ule_sndu_remain) { + /* + * Pointer field is invalid. + * Drop this TS cell and any started ULE SNDU. + */ + pr_warn("%lu: Invalid pointer field: %u.\n", + h->priv->ts_count, + *h->from_where); + + /* + * Drop partly decoded SNDU, reset state, + * resync on PUSI. + */ + if (h->priv->ule_skb) { + h->error = true; + dev_kfree_skb(h->priv->ule_skb); + } + + if (h->error || h->priv->ule_sndu_remain) { + h->dev->stats.rx_errors++; + h->dev->stats.rx_frame_errors++; + h->error = false; + } + + reset_ule(h->priv); + h->priv->need_pusi = 1; + return 1; + } + /* + * Skip pointer field (we're processing a + * packed payload). + */ + h->from_where += 1; + h->ts_remain -= 1; + } else + h->priv->need_pusi = 0; + + if (h->priv->ule_sndu_remain > 183) { + /* + * Current SNDU lacks more data than there + * could be available in the current TS cell. + */ + h->dev->stats.rx_errors++; + h->dev->stats.rx_length_errors++; + pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, h->ts_remain %d). Flushing incomplete payload.\n", + h->priv->ts_count, + h->priv->ule_sndu_remain, + h->ts[4], h->ts_remain); + dev_kfree_skb(h->priv->ule_skb); + /* Prepare for next SNDU. */ + reset_ule(h->priv); + /* + * Resync: go to where pointer field points to: + * start of next ULE SNDU. + */ + h->from_where += h->ts[4]; + h->ts_remain -= h->ts[4]; + } + } + return 0; +} + + +/* + * 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 h.ts_remain has to be >= 2 here. + */ +static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h) +{ + if (h->ts_remain < 2) { + pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n", + h->ts_remain); + h->priv->ule_sndu_len = 0; + h->priv->need_pusi = 1; + h->ts += TS_SZ; + return 1; + } + + if (!h->priv->ule_sndu_len) { + /* Got at least two bytes, thus extrace the SNDU length. */ + h->priv->ule_sndu_len = h->from_where[0] << 8 | + h->from_where[1]; + if (h->priv->ule_sndu_len & 0x8000) { + /* D-Bit is set: no dest mac present. */ + h->priv->ule_sndu_len &= 0x7FFF; + h->priv->ule_dbit = 1; + } else + h->priv->ule_dbit = 0; + + if (h->priv->ule_sndu_len < 5) { + pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n", + h->priv->ts_count, + h->priv->ule_sndu_len); + h->dev->stats.rx_errors++; + h->dev->stats.rx_length_errors++; + h->priv->ule_sndu_len = 0; + h->priv->need_pusi = 1; + h->new_ts = 1; + h->ts += TS_SZ; + h->priv->ts_count++; + return 1; + } + h->ts_remain -= 2; /* consume the 2 bytes SNDU length. */ + h->from_where += 2; + } + + h->priv->ule_sndu_remain = h->priv->ule_sndu_len + 2; + /* + * State of current TS: + * h->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 (h->ts_remain) { + case 1: + h->priv->ule_sndu_remain--; + h->priv->ule_sndu_type = h->from_where[0] << 8; + + /* first byte of ule_type is set. */ + h->priv->ule_sndu_type_1 = 1; + h->ts_remain -= 1; + h->from_where += 1; + fallthrough; + case 0: + h->new_ts = 1; + h->ts += TS_SZ; + h->priv->ts_count++; + return 1; + + default: /* complete ULE header is present in current TS. */ + /* Extract ULE type field. */ + if (h->priv->ule_sndu_type_1) { + h->priv->ule_sndu_type_1 = 0; + h->priv->ule_sndu_type |= h->from_where[0]; + h->from_where += 1; /* points to payload start. */ + h->ts_remain -= 1; + } else { + /* Complete type is present in new TS. */ + h->priv->ule_sndu_type = h->from_where[0] << 8 | + h->from_where[1]; + h->from_where += 2; /* points to payload start. */ + h->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). + */ + h->priv->ule_skb = dev_alloc_skb(h->priv->ule_sndu_len + + ETH_HLEN + ETH_ALEN); + if (!h->priv->ule_skb) { + pr_notice("%s: Memory squeeze, dropping packet.\n", + h->dev->name); + h->dev->stats.rx_dropped++; + return -1; + } + + /* This includes the CRC32 _and_ dest mac, if !dbit. */ + h->priv->ule_sndu_remain = h->priv->ule_sndu_len; + h->priv->ule_skb->dev = h->dev; + /* + * Leave space for Ethernet or bridged SNDU header + * (eth hdr plus one MAC addr). + */ + skb_reserve(h->priv->ule_skb, ETH_HLEN + ETH_ALEN); + + return 0; +} + + +static int dvb_net_ule_should_drop(struct dvb_net_ule_handle *h) +{ + static const u8 bc_addr[ETH_ALEN] = { [0 ... ETH_ALEN - 1] = 0xff }; + + /* + * 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. + */ + if (h->priv->rx_mode == RX_MODE_PROMISC) + return 0; + + if (h->priv->ule_skb->data[0] & 0x01) { + /* multicast or broadcast */ + if (!ether_addr_equal(h->priv->ule_skb->data, bc_addr)) { + /* multicast */ + if (h->priv->rx_mode == RX_MODE_MULTI) { + int i; + + for (i = 0; i < h->priv->multi_num && + !ether_addr_equal(h->priv->ule_skb->data, + h->priv->multi_macs[i]); + i++) + ; + if (i == h->priv->multi_num) + return 1; + } else if (h->priv->rx_mode != RX_MODE_ALL_MULTI) + return 1; /* no broadcast; */ + /* + * else: + * all multicast mode: accept all multicast packets + */ + } + /* else: broadcast */ + } else if (!ether_addr_equal(h->priv->ule_skb->data, h->dev->dev_addr)) + return 1; + + return 0; +} + + +static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h, + struct kvec iov[3], + u32 ule_crc, u32 expected_crc) +{ + u8 dest_addr[ETH_ALEN]; + + if (ule_crc != expected_crc) { + pr_warn("%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", + h->priv->ts_count, ule_crc, expected_crc, + h->priv->ule_sndu_len, h->priv->ule_sndu_type, + h->ts_remain, + h->ts_remain > 2 ? + *(unsigned short *)h->from_where : 0); + + #ifdef DVB_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 + + h->dev->stats.rx_errors++; + h->dev->stats.rx_crc_errors++; + dev_kfree_skb(h->priv->ule_skb); + + return; + } + + /* CRC32 verified OK. */ + + /* CRC32 was OK, so remove it from skb. */ + h->priv->ule_skb->tail -= 4; + h->priv->ule_skb->len -= 4; + + if (!h->priv->ule_dbit) { + if (dvb_net_ule_should_drop(h)) { + netdev_dbg(h->dev, + "Dropping SNDU: MAC destination address does not match: dest addr: %pM, h->dev addr: %pM\n", + h->priv->ule_skb->data, h->dev->dev_addr); + dev_kfree_skb(h->priv->ule_skb); + return; + } + + skb_copy_from_linear_data(h->priv->ule_skb, dest_addr, + ETH_ALEN); + skb_pull(h->priv->ule_skb, ETH_ALEN); + } else { + /* dest_addr buffer is only valid if h->priv->ule_dbit == 0 */ + eth_zero_addr(dest_addr); + } + + /* Handle ULE Extension Headers. */ + if (h->priv->ule_sndu_type < ETH_P_802_3_MIN) { + /* There is an extension header. Handle it accordingly. */ + int l = handle_ule_extensions(h->priv); + + if (l < 0) { + /* + * Mandatory extension header unknown or TEST SNDU. + * Drop it. + */ + + // pr_warn("Dropping SNDU, extension headers.\n" ); + dev_kfree_skb(h->priv->ule_skb); + return; + } + skb_pull(h->priv->ule_skb, l); + } + + /* + * Construct/assure correct ethernet header. + * Note: in bridged mode (h->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 (!h->priv->ule_bridged) { + skb_push(h->priv->ule_skb, ETH_HLEN); + h->ethh = (struct ethhdr *)h->priv->ule_skb->data; + memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN); + eth_zero_addr(h->ethh->h_source); + h->ethh->h_proto = htons(h->priv->ule_sndu_type); + } + /* else: skb is in correct state; nothing to do. */ + h->priv->ule_bridged = 0; + + /* Stuff into kernel's protocol stack. */ + h->priv->ule_skb->protocol = dvb_net_eth_type_trans(h->priv->ule_skb, + h->dev); + /* + * If D-bit is set (i.e. destination MAC address not present), + * receive the packet anyhow. + */ +#if 0 + if (h->priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) + h->priv->ule_skb->pkt_type = PACKET_HOST; +#endif + h->dev->stats.rx_packets++; + h->dev->stats.rx_bytes += h->priv->ule_skb->len; + netif_rx(h->priv->ule_skb); +} + +static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len) +{ + int ret; + struct dvb_net_ule_handle h = { + .dev = dev, + .priv = netdev_priv(dev), + .ethh = NULL, + .buf = buf, + .buf_len = buf_len, + .skipped = 0L, + .ts = NULL, + .ts_end = NULL, + .from_where = NULL, + .ts_remain = 0, + .how_much = 0, + .new_ts = 1, + .error = false, + }; + + /* + * For all TS cells in current buffer. + * Appearently, we are called for every single TS cell. + */ + for (h.ts = h.buf, h.ts_end = h.buf + h.buf_len; + h.ts < h.ts_end; /* no incr. */) { + if (h.new_ts) { + /* We are about to process a new TS cell. */ + if (dvb_net_ule_new_ts_cell(&h)) + continue; + } + + /* Synchronize on PUSI, if required. */ + if (h.priv->need_pusi) { + if (dvb_net_ule_ts_pusi(&h)) + continue; + } + + if (h.new_ts) { + if (dvb_net_ule_new_ts(&h)) + continue; + } + + /* Check if new payload needs to be started. */ + if (h.priv->ule_skb == NULL) { + ret = dvb_net_ule_new_payload(&h); + if (ret < 0) + return; + if (ret) + continue; + } + + /* Copy data into our current skb. */ + h.how_much = min(h.priv->ule_sndu_remain, (int)h.ts_remain); + skb_put_data(h.priv->ule_skb, h.from_where, h.how_much); + h.priv->ule_sndu_remain -= h.how_much; + h.ts_remain -= h.how_much; + h.from_where += h.how_much; + + /* Check for complete payload. */ + if (h.priv->ule_sndu_remain <= 0) { + /* Check CRC32, we've got it in our skb already. */ + __be16 ulen = htons(h.priv->ule_sndu_len); + __be16 utype = htons(h.priv->ule_sndu_type); + const u8 *tail; + struct kvec iov[3] = { + { &ulen, sizeof ulen }, + { &utype, sizeof utype }, + { h.priv->ule_skb->data, + h.priv->ule_skb->len - 4 } + }; + u32 ule_crc = ~0L, expected_crc; + if (h.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(h.priv->ule_skb); + expected_crc = *(tail - 4) << 24 | + *(tail - 3) << 16 | + *(tail - 2) << 8 | + *(tail - 1); + + dvb_net_ule_check_crc(&h, iov, ule_crc, expected_crc); + + /* Prepare for next SNDU. */ + reset_ule(h.priv); + } + + /* More data in current TS (look at the bytes following the CRC32)? */ + if (h.ts_remain >= 2 && *((unsigned short *)h.from_where) != 0xFFFF) { + /* Next ULE SNDU starts right there. */ + h.new_ts = 0; + h.priv->ule_skb = NULL; + h.priv->ule_sndu_type_1 = 0; + h.priv->ule_sndu_len = 0; + // pr_warn("More data in current TS: [%#x %#x %#x %#x]\n", + // *(h.from_where + 0), *(h.from_where + 1), + // *(h.from_where + 2), *(h.from_where + 3)); + // pr_warn("h.ts @ %p, stopped @ %p:\n", h.ts, h.from_where + 0); + // hexdump(h.ts, 188); + } else { + h.new_ts = 1; + h.ts += TS_SZ; + h.priv->ts_count++; + if (h.priv->ule_skb == NULL) { + h.priv->need_pusi = 1; + h.priv->ule_sndu_type_1 = 0; + h.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, + u32 *buffer_flags) +{ + struct net_device *dev = feed->priv; + + if (buffer2) + pr_warn("buffer2 not NULL: %p.\n", buffer2); + if (buffer1_len > 32768) + pr_warn("length > 32k: %zu.\n", buffer1_len); + /* pr_info("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) { + pr_warn("%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))) { + //pr_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 = 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, u32 *buffer_flags) +{ + 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 netdev_tx_t 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, + const 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) { + pr_err("%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; + const unsigned char *mac = (const 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]) + pr_err("%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) { + pr_err("%s: could not allocate section feed\n", + dev->name); + goto error; + } + + ret = priv->secfeed->set(priv->secfeed, priv->pid, 1); + + if (ret<0) { + pr_err("%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) { + ktime_t timeout = ns_to_ktime(10 * NSEC_PER_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) { + pr_err("%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 */ + timeout /* timeout */ + ); + + if (ret < 0) { + pr_err("%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 + pr_err("%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 + pr_err("%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; + + eth_hw_addr_set(dev, addr->sa_data); + + 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_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->max_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; + eth_hw_addr_set(net, dvbnet->dvbdev->adapter->proposed_mac); + + 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; + } + pr_info("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); + pr_info("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; + int if_num = dvbnetif->if_num; + + if (if_num >= DVB_NET_DEVICES_MAX) { + ret = -EINVAL; + goto ioctl_error; + } + if_num = array_index_nospec(if_num, DVB_NET_DEVICES_MAX); + + if (!dvbnet->state[if_num]) { + ret = -EINVAL; + goto ioctl_error; + } + + netdev = dvbnet->device[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; + int if_num = dvbnetif->if_num; + + if (if_num >= DVB_NET_DEVICES_MAX) { + ret = -EINVAL; + goto ioctl_error; + } + if_num = array_index_nospec(if_num, DVB_NET_DEVICES_MAX); + + if (!dvbnet->state[if_num]) { + ret = -EINVAL; + goto ioctl_error; + } + + netdev = dvbnet->device[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 locked_dvb_net_open(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev = file->private_data; + struct dvb_net *dvbnet = dvbdev->priv; + int ret; + + if (mutex_lock_interruptible(&dvbnet->remove_mutex)) + return -ERESTARTSYS; + + if (dvbnet->exit) { + mutex_unlock(&dvbnet->remove_mutex); + return -ENODEV; + } + + ret = dvb_generic_open(inode, file); + + mutex_unlock(&dvbnet->remove_mutex); + + return ret; +} + +static int dvb_net_close(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev = file->private_data; + struct dvb_net *dvbnet = dvbdev->priv; + + mutex_lock(&dvbnet->remove_mutex); + + dvb_generic_release(inode, file); + + if (dvbdev->users == 1 && dvbnet->exit == 1) { + mutex_unlock(&dvbnet->remove_mutex); + wake_up(&dvbdev->wait_queue); + } else { + mutex_unlock(&dvbnet->remove_mutex); + } + + return 0; +} + + +static const struct file_operations dvb_net_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = dvb_net_ioctl, + .open = locked_dvb_net_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; + + mutex_lock(&dvbnet->remove_mutex); + dvbnet->exit = 1; + mutex_unlock(&dvbnet->remove_mutex); + + 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); + mutex_init(&dvbnet->remove_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, 0); +} +EXPORT_SYMBOL(dvb_net_init); |