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1619 lines
41 KiB
1619 lines
41 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* dvb_net.c |
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* |
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* Copyright (C) 2001 Convergence integrated media GmbH |
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* Ralph Metzler <[email protected]> |
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* Copyright (C) 2002 Ralph Metzler <[email protected]> |
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* |
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* ULE Decapsulation code: |
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* Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH. |
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* and Department of Scientific Computing |
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* Paris Lodron University of Salzburg. |
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* Hilmar Linder <[email protected]> |
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* and Wolfram Stering <[email protected]> |
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* |
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* ULE Decaps according to RFC 4326. |
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*/ |
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|
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/* |
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* ULE ChangeLog: |
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* Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt |
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* |
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* Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt: |
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* ULE Extension header handling. |
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* Bugreports by Moritz Vieth and Hanno Tersteegen, |
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* Fraunhofer Institute for Open Communication Systems |
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* Competence Center for Advanced Satellite Communications. |
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* Bugfixes and robustness improvements. |
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* Filtering on dest MAC addresses, if present (D-Bit = 0) |
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* DVB_ULE_DEBUG compile-time option. |
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* Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by |
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* Christian Praehauser <[email protected]>, |
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* Paris Lodron University of Salzburg. |
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*/ |
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|
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/* |
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* FIXME / TODO (dvb_net.c): |
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* |
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* Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero. |
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* |
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*/ |
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|
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#define pr_fmt(fmt) "dvb_net: " fmt |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/dvb/net.h> |
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#include <linux/uio.h> |
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#include <linux/uaccess.h> |
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#include <linux/crc32.h> |
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#include <linux/mutex.h> |
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#include <linux/sched.h> |
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#include <media/dvb_demux.h> |
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#include <media/dvb_net.h> |
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|
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static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) |
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{ |
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unsigned int j; |
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for (j = 0; j < cnt; j++) |
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c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); |
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return c; |
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} |
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#define DVB_NET_MULTICAST_MAX 10 |
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|
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#ifdef DVB_ULE_DEBUG |
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/* |
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* The code inside DVB_ULE_DEBUG keeps a history of the |
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* last 100 TS cells processed. |
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*/ |
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static unsigned char ule_hist[100*TS_SZ] = { 0 }; |
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static unsigned char *ule_where = ule_hist, ule_dump; |
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|
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static void hexdump(const unsigned char *buf, unsigned short len) |
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{ |
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print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true); |
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} |
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#endif |
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struct dvb_net_priv { |
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int in_use; |
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u16 pid; |
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struct net_device *net; |
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struct dvb_net *host; |
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struct dmx_demux *demux; |
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struct dmx_section_feed *secfeed; |
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struct dmx_section_filter *secfilter; |
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struct dmx_ts_feed *tsfeed; |
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int multi_num; |
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struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; |
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unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; |
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int rx_mode; |
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#define RX_MODE_UNI 0 |
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#define RX_MODE_MULTI 1 |
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#define RX_MODE_ALL_MULTI 2 |
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#define RX_MODE_PROMISC 3 |
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struct work_struct set_multicast_list_wq; |
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struct work_struct restart_net_feed_wq; |
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unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ |
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int need_pusi; /* Set to 1, if synchronization on PUSI required. */ |
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unsigned char tscc; /* TS continuity counter after sync on PUSI. */ |
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struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ |
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unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ |
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unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ |
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unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ |
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unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ |
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unsigned char ule_dbit; /* Whether the DestMAC address present |
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* or not (bit is set). */ |
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unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ |
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int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ |
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unsigned long ts_count; /* Current ts cell counter. */ |
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struct mutex mutex; |
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}; |
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/* |
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* Determine the packet's protocol ID. The rule here is that we |
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* assume 802.3 if the type field is short enough to be a length. |
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* This is normal practice and works for any 'now in use' protocol. |
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* |
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* stolen from eth.c out of the linux kernel, hacked for dvb-device |
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* by Michael Holzt <[email protected]> |
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*/ |
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static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, |
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struct net_device *dev) |
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{ |
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struct ethhdr *eth; |
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unsigned char *rawp; |
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|
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skb_reset_mac_header(skb); |
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skb_pull(skb,dev->hard_header_len); |
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eth = eth_hdr(skb); |
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if (*eth->h_dest & 1) { |
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if(ether_addr_equal(eth->h_dest,dev->broadcast)) |
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skb->pkt_type=PACKET_BROADCAST; |
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else |
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skb->pkt_type=PACKET_MULTICAST; |
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} |
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if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
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return eth->h_proto; |
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rawp = skb->data; |
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|
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/* |
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* This is a magic hack to spot IPX packets. Older Novell breaks |
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC |
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This |
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* won't work for fault tolerant netware but does for the rest. |
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*/ |
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if (*(unsigned short *)rawp == 0xFFFF) |
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return htons(ETH_P_802_3); |
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|
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/* |
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* Real 802.2 LLC |
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*/ |
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return htons(ETH_P_802_2); |
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} |
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#define TS_SZ 188 |
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#define TS_SYNC 0x47 |
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#define TS_TEI 0x80 |
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#define TS_SC 0xC0 |
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#define TS_PUSI 0x40 |
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#define TS_AF_A 0x20 |
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#define TS_AF_D 0x10 |
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|
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/* ULE Extension Header handlers. */ |
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#define ULE_TEST 0 |
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#define ULE_BRIDGED 1 |
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#define ULE_OPTEXTHDR_PADDING 0 |
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static int ule_test_sndu( struct dvb_net_priv *p ) |
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{ |
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return -1; |
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} |
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static int ule_bridged_sndu( struct dvb_net_priv *p ) |
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{ |
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struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; |
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if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { |
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int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); |
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/* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ |
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if(framelen != ntohs(hdr->h_proto)) { |
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return -1; |
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} |
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} |
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/* Note: |
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* From RFC4326: |
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* "A bridged SNDU is a Mandatory Extension Header of Type 1. |
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* It must be the final (or only) extension header specified in the header chain of a SNDU." |
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* The 'ule_bridged' flag will cause the extension header processing loop to terminate. |
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*/ |
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p->ule_bridged = 1; |
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return 0; |
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} |
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static int ule_exthdr_padding(struct dvb_net_priv *p) |
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{ |
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return 0; |
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} |
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/* |
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* Handle ULE extension headers. |
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* Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. |
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* Returns: >= 0: nr. of bytes consumed by next extension header |
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* -1: Mandatory extension header that is not recognized or TEST SNDU; discard. |
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*/ |
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static int handle_one_ule_extension( struct dvb_net_priv *p ) |
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{ |
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/* Table of mandatory extension header handlers. The header type is the index. */ |
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static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = |
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{ [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; |
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|
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/* Table of optional extension header handlers. The header type is the index. */ |
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static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = |
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{ [0] = ule_exthdr_padding, [1] = NULL, }; |
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int ext_len = 0; |
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unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; |
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unsigned char htype = p->ule_sndu_type & 0x00FF; |
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|
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/* Discriminate mandatory and optional extension headers. */ |
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if (hlen == 0) { |
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/* Mandatory extension header */ |
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if (ule_mandatory_ext_handlers[htype]) { |
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ext_len = ule_mandatory_ext_handlers[htype]( p ); |
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if(ext_len >= 0) { |
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p->ule_next_hdr += ext_len; |
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if (!p->ule_bridged) { |
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p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); |
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p->ule_next_hdr += 2; |
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} else { |
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p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); |
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/* This assures the extension handling loop will terminate. */ |
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} |
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} |
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// else: extension handler failed or SNDU should be discarded |
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} else |
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ext_len = -1; /* SNDU has to be discarded. */ |
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} else { |
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/* Optional extension header. Calculate the length. */ |
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ext_len = hlen << 1; |
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/* Process the optional extension header according to its type. */ |
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if (ule_optional_ext_handlers[htype]) |
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(void)ule_optional_ext_handlers[htype]( p ); |
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p->ule_next_hdr += ext_len; |
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p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); |
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/* |
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* note: the length of the next header type is included in the |
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* length of THIS optional extension header |
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*/ |
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} |
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return ext_len; |
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} |
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static int handle_ule_extensions( struct dvb_net_priv *p ) |
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{ |
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int total_ext_len = 0, l; |
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p->ule_next_hdr = p->ule_skb->data; |
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do { |
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l = handle_one_ule_extension( p ); |
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if (l < 0) |
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return l; /* Stop extension header processing and discard SNDU. */ |
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total_ext_len += l; |
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pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n", |
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p->ule_next_hdr, (int)p->ule_sndu_type, |
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l, total_ext_len); |
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} while (p->ule_sndu_type < ETH_P_802_3_MIN); |
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return total_ext_len; |
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} |
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/* Prepare for a new ULE SNDU: reset the decoder state. */ |
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static inline void reset_ule( struct dvb_net_priv *p ) |
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{ |
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p->ule_skb = NULL; |
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p->ule_next_hdr = NULL; |
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p->ule_sndu_len = 0; |
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p->ule_sndu_type = 0; |
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p->ule_sndu_type_1 = 0; |
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p->ule_sndu_remain = 0; |
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p->ule_dbit = 0xFF; |
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p->ule_bridged = 0; |
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} |
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/* |
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* Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of |
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* TS cells of a single PID. |
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*/ |
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struct dvb_net_ule_handle { |
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struct net_device *dev; |
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struct dvb_net_priv *priv; |
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struct ethhdr *ethh; |
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const u8 *buf; |
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size_t buf_len; |
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unsigned long skipped; |
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const u8 *ts, *ts_end, *from_where; |
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u8 ts_remain, how_much, new_ts; |
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bool error; |
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}; |
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static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h) |
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{ |
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/* We are about to process a new TS cell. */ |
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#ifdef DVB_ULE_DEBUG |
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if (ule_where >= &ule_hist[100*TS_SZ]) |
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ule_where = ule_hist; |
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memcpy(ule_where, h->ts, TS_SZ); |
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if (ule_dump) { |
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hexdump(ule_where, TS_SZ); |
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ule_dump = 0; |
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} |
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ule_where += TS_SZ; |
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#endif |
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|
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/* |
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* Check TS h->error conditions: sync_byte, transport_error_indicator, |
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* scrambling_control . |
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*/ |
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if ((h->ts[0] != TS_SYNC) || (h->ts[1] & TS_TEI) || |
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((h->ts[3] & TS_SC) != 0)) { |
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pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", |
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h->priv->ts_count, h->ts[0], |
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(h->ts[1] & TS_TEI) >> 7, |
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(h->ts[3] & TS_SC) >> 6); |
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|
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/* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
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if (h->priv->ule_skb) { |
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dev_kfree_skb(h->priv->ule_skb); |
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/* Prepare for next SNDU. */ |
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h->dev->stats.rx_errors++; |
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h->dev->stats.rx_frame_errors++; |
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} |
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reset_ule(h->priv); |
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h->priv->need_pusi = 1; |
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/* Continue with next TS cell. */ |
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h->ts += TS_SZ; |
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h->priv->ts_count++; |
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return 1; |
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} |
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h->ts_remain = 184; |
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h->from_where = h->ts + 4; |
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return 0; |
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} |
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static int dvb_net_ule_ts_pusi(struct dvb_net_ule_handle *h) |
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{ |
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if (h->ts[1] & TS_PUSI) { |
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/* Find beginning of first ULE SNDU in current TS cell. */ |
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/* Synchronize continuity counter. */ |
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h->priv->tscc = h->ts[3] & 0x0F; |
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/* There is a pointer field here. */ |
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if (h->ts[4] > h->ts_remain) { |
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pr_err("%lu: Invalid ULE packet (pointer field %d)\n", |
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h->priv->ts_count, h->ts[4]); |
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h->ts += TS_SZ; |
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h->priv->ts_count++; |
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return 1; |
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} |
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/* Skip to destination of pointer field. */ |
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h->from_where = &h->ts[5] + h->ts[4]; |
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h->ts_remain -= 1 + h->ts[4]; |
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h->skipped = 0; |
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} else { |
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h->skipped++; |
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h->ts += TS_SZ; |
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h->priv->ts_count++; |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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static int dvb_net_ule_new_ts(struct dvb_net_ule_handle *h) |
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{ |
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/* Check continuity counter. */ |
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if ((h->ts[3] & 0x0F) == h->priv->tscc) |
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h->priv->tscc = (h->priv->tscc + 1) & 0x0F; |
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else { |
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/* TS discontinuity handling: */ |
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pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n", |
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h->priv->ts_count, h->ts[3] & 0x0F, |
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h->priv->tscc); |
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/* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
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if (h->priv->ule_skb) { |
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dev_kfree_skb(h->priv->ule_skb); |
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/* Prepare for next SNDU. */ |
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// reset_ule(h->priv); moved to below. |
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h->dev->stats.rx_errors++; |
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h->dev->stats.rx_frame_errors++; |
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} |
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reset_ule(h->priv); |
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/* skip to next PUSI. */ |
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h->priv->need_pusi = 1; |
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return 1; |
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} |
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/* |
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* If we still have an incomplete payload, but PUSI is |
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* set; some TS cells are missing. |
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* This is only possible here, if we missed exactly 16 TS |
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* cells (continuity counter wrap). |
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*/ |
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if (h->ts[1] & TS_PUSI) { |
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if (!h->priv->need_pusi) { |
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if (!(*h->from_where < (h->ts_remain-1)) || |
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*h->from_where != h->priv->ule_sndu_remain) { |
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/* |
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* Pointer field is invalid. |
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* Drop this TS cell and any started ULE SNDU. |
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*/ |
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pr_warn("%lu: Invalid pointer field: %u.\n", |
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h->priv->ts_count, |
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*h->from_where); |
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|
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/* |
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* Drop partly decoded SNDU, reset state, |
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* resync on PUSI. |
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*/ |
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if (h->priv->ule_skb) { |
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h->error = true; |
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dev_kfree_skb(h->priv->ule_skb); |
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} |
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|
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if (h->error || h->priv->ule_sndu_remain) { |
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h->dev->stats.rx_errors++; |
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h->dev->stats.rx_frame_errors++; |
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h->error = false; |
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} |
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|
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reset_ule(h->priv); |
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h->priv->need_pusi = 1; |
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return 1; |
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} |
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/* |
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* Skip pointer field (we're processing a |
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* packed payload). |
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*/ |
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h->from_where += 1; |
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h->ts_remain -= 1; |
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} else |
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h->priv->need_pusi = 0; |
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|
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if (h->priv->ule_sndu_remain > 183) { |
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/* |
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* Current SNDU lacks more data than there |
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* could be available in the current TS cell. |
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*/ |
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h->dev->stats.rx_errors++; |
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h->dev->stats.rx_length_errors++; |
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pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, h->ts_remain %d). Flushing incomplete payload.\n", |
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h->priv->ts_count, |
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h->priv->ule_sndu_remain, |
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h->ts[4], h->ts_remain); |
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dev_kfree_skb(h->priv->ule_skb); |
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/* Prepare for next SNDU. */ |
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reset_ule(h->priv); |
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/* |
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* Resync: go to where pointer field points to: |
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* start of next ULE SNDU. |
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*/ |
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h->from_where += h->ts[4]; |
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h->ts_remain -= h->ts[4]; |
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} |
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} |
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return 0; |
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} |
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|
|
|
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/* |
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* Start a new payload with skb. |
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* Find ULE header. It is only guaranteed that the |
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* length field (2 bytes) is contained in the current |
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* TS. |
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* Check h.ts_remain has to be >= 2 here. |
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*/ |
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static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h) |
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{ |
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if (h->ts_remain < 2) { |
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pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n", |
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h->ts_remain); |
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h->priv->ule_sndu_len = 0; |
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h->priv->need_pusi = 1; |
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h->ts += TS_SZ; |
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return 1; |
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} |
|
|
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if (!h->priv->ule_sndu_len) { |
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/* Got at least two bytes, thus extrace the SNDU length. */ |
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h->priv->ule_sndu_len = h->from_where[0] << 8 | |
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h->from_where[1]; |
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if (h->priv->ule_sndu_len & 0x8000) { |
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/* D-Bit is set: no dest mac present. */ |
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h->priv->ule_sndu_len &= 0x7FFF; |
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h->priv->ule_dbit = 1; |
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} else |
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h->priv->ule_dbit = 0; |
|
|
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if (h->priv->ule_sndu_len < 5) { |
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pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n", |
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h->priv->ts_count, |
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h->priv->ule_sndu_len); |
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h->dev->stats.rx_errors++; |
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h->dev->stats.rx_length_errors++; |
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h->priv->ule_sndu_len = 0; |
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h->priv->need_pusi = 1; |
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h->new_ts = 1; |
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h->ts += TS_SZ; |
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h->priv->ts_count++; |
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return 1; |
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} |
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h->ts_remain -= 2; /* consume the 2 bytes SNDU length. */ |
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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, |
|
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; |
|
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]) |
|
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; |
|
|
|
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_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; |
|
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; |
|
} |
|
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; |
|
|
|
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, 0); |
|
} |
|
EXPORT_SYMBOL(dvb_net_init);
|
|
|