| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Michael Hunold | 3090 | 39.45% | 7 | 7.53% |
| Alan Cox | 2184 | 27.88% | 3 | 3.23% |
| Mauro Carvalho Chehab | 1291 | 16.48% | 14 | 15.05% |
| Christian Praehauser | 217 | 2.77% | 1 | 1.08% |
| Johannes Stezenbach | 177 | 2.26% | 4 | 4.30% |
| Nikolaus Schulz | 155 | 1.98% | 1 | 1.08% |
| Hyunwoo Kim | 95 | 1.21% | 1 | 1.08% |
| Stephen Hemminger | 80 | 1.02% | 2 | 2.15% |
| Ralph Metzler | 70 | 0.89% | 1 | 1.08% |
| Markus Rechberger | 65 | 0.83% | 1 | 1.08% |
| Joe Perches | 62 | 0.79% | 3 | 3.23% |
| Andrew Morton | 59 | 0.75% | 1 | 1.08% |
| Ang Way Chuang | 46 | 0.59% | 2 | 2.15% |
| David Howells | 45 | 0.57% | 1 | 1.08% |
| Wang Chen | 36 | 0.46% | 1 | 1.08% |
| Al Viro | 30 | 0.38% | 6 | 6.45% |
| Jiri Pirko | 24 | 0.31% | 4 | 4.30% |
| Arnd Bergmann | 24 | 0.31% | 5 | 5.38% |
| Arnaldo Carvalho de Melo | 11 | 0.14% | 4 | 4.30% |
| Ingo Molnar | 9 | 0.11% | 2 | 2.15% |
| Trent Piepho | 8 | 0.10% | 2 | 2.15% |
| Linus Torvalds (pre-git) | 7 | 0.09% | 3 | 3.23% |
| Jarod Wilson | 6 | 0.08% | 1 | 1.08% |
| David S. Miller | 6 | 0.08% | 2 | 2.15% |
| Tejun Heo | 5 | 0.06% | 2 | 2.15% |
| Simon Horman | 5 | 0.06% | 1 | 1.08% |
| Jakub Kiciński | 5 | 0.06% | 1 | 1.08% |
| Gustavo A. R. Silva | 2 | 0.03% | 1 | 1.08% |
| Tom Gundersen | 2 | 0.03% | 1 | 1.08% |
| Thomas Gleixner | 2 | 0.03% | 1 | 1.08% |
| Hans Verkuil | 2 | 0.03% | 1 | 1.08% |
| Luc Van Oostenryck | 1 | 0.01% | 1 | 1.08% |
| Dirk Hohndel | 1 | 0.01% | 1 | 1.08% |
| Johannes Berg | 1 | 0.01% | 1 | 1.08% |
| Ding Tianhong | 1 | 0.01% | 1 | 1.08% |
| Patrick McHardy | 1 | 0.01% | 1 | 1.08% |
| Peter Beutner | 1 | 0.01% | 1 | 1.08% |
| Dan Carpenter | 1 | 0.01% | 1 | 1.08% |
| Harvey Harrison | 1 | 0.01% | 1 | 1.08% |
| Vaishali Thakkar | 1 | 0.01% | 1 | 1.08% |
| Jonathan Nieder | 1 | 0.01% | 1 | 1.08% |
| Christoph Hellwig | 1 | 0.01% | 1 | 1.08% |
| Linus Torvalds | 1 | 0.01% | 1 | 1.08% |
| Jan Engelhardt | 1 | 0.01% | 1 | 1.08% |
| Total | 7833 | 93 |
// 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);
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