forked from Minki/linux
034005a011
If the FIFO of the card is small, many short messages are queued up to the upper layers and the userspace. This change allows the applications to set a minimum datalen they want from the drivers. Create a common control function to avoid code duplication in each driver. Signed-off-by: Karsten Keil <kkeil@linux-pingi.de> Signed-off-by: David S. Miller <davem@davemloft.net>
1533 lines
40 KiB
C
1533 lines
40 KiB
C
/*
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* l1oip.c low level driver for tunneling layer 1 over IP
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*
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* NOTE: It is not compatible with TDMoIP nor "ISDN over IP".
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*
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* Author Andreas Eversberg (jolly@eversberg.eu)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/* module parameters:
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* type:
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Value 1 = BRI
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Value 2 = PRI
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Value 3 = BRI (multi channel frame, not supported yet)
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Value 4 = PRI (multi channel frame, not supported yet)
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A multi channel frame reduces overhead to a single frame for all
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b-channels, but increases delay.
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(NOTE: Multi channel frames are not implemented yet.)
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* codec:
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Value 0 = transparent (default)
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Value 1 = transfer ALAW
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Value 2 = transfer ULAW
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Value 3 = transfer generic 4 bit compression.
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* ulaw:
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0 = we use a-Law (default)
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1 = we use u-Law
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* limit:
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limitation of B-channels to control bandwidth (1...126)
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BRI: 1 or 2
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PRI: 1-30, 31-126 (126, because dchannel ist not counted here)
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Also limited ressources are used for stack, resulting in less channels.
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It is possible to have more channels than 30 in PRI mode, this must
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be supported by the application.
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* ip:
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byte representation of remote ip address (127.0.0.1 -> 127,0,0,1)
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If not given or four 0, no remote address is set.
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For multiple interfaces, concat ip addresses. (127,0,0,1,127,0,0,1)
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* port:
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port number (local interface)
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If not given or 0, port 931 is used for fist instance, 932 for next...
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For multiple interfaces, different ports must be given.
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* remoteport:
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port number (remote interface)
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If not given or 0, remote port equals local port
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For multiple interfaces on equal sites, different ports must be given.
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* ondemand:
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0 = fixed (always transmit packets, even when remote side timed out)
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1 = on demand (only transmit packets, when remote side is detected)
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the default is 0
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NOTE: ID must also be set for on demand.
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* id:
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optional value to identify frames. This value must be equal on both
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peers and should be random. If omitted or 0, no ID is transmitted.
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* debug:
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NOTE: only one debug value must be given for all cards
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enable debugging (see l1oip.h for debug options)
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Special mISDN controls:
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op = MISDN_CTRL_SETPEER*
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p1 = bytes 0-3 : remote IP address in network order (left element first)
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p2 = bytes 1-2 : remote port in network order (high byte first)
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optional:
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p2 = bytes 3-4 : local port in network order (high byte first)
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op = MISDN_CTRL_UNSETPEER*
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* Use l1oipctrl for comfortable setting or removing ip address.
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(Layer 1 Over IP CTRL)
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L1oIP-Protocol
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--------------
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Frame Header:
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7 6 5 4 3 2 1 0
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+---------------+
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|Ver|T|I|Coding |
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+---------------+
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| ID byte 3 * |
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+---------------+
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| ID byte 2 * |
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+---------------+
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| ID byte 1 * |
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+---------------+
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| ID byte 0 * |
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+---------------+
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|M| Channel |
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+---------------+
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| Length * |
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+---------------+
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| Time Base MSB |
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+---------------+
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| Time Base LSB |
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+---------------+
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| Data.... |
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...
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| |
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+---------------+
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|M| Channel |
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+---------------+
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| Length * |
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+---------------+
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| Time Base MSB |
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+---------------+
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| Time Base LSB |
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+---------------+
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| Data.... |
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...
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* Only included in some cases.
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- Ver = Version
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If version is missmatch, the frame must be ignored.
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- T = Type of interface
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Must be 0 for S0 or 1 for E1.
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- I = Id present
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If bit is set, four ID bytes are included in frame.
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- ID = Connection ID
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Additional ID to prevent Denial of Service attacs. Also it prevents hijacking
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connections with dynamic IP. The ID should be random and must not be 0.
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- Coding = Type of codec
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Must be 0 for no transcoding. Also for D-channel and other HDLC frames.
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1 and 2 are reserved for explicitly use of a-LAW or u-LAW codec.
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3 is used for generic table compressor.
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- M = More channels to come. If this flag is 1, the following byte contains
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the length of the channel data. After the data block, the next channel will
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be defined. The flag for the last channel block (or if only one channel is
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transmitted), must be 0 and no length is given.
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- Channel = Channel number
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0 reserved
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1-3 channel data for S0 (3 is D-channel)
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1-31 channel data for E1 (16 is D-channel)
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32-127 channel data for extended E1 (16 is D-channel)
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- The length is used if the M-flag is 1. It is used to find the next channel
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inside frame.
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NOTE: A value of 0 equals 256 bytes of data.
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-> For larger data blocks, a single frame must be used.
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-> For larger streams, a single frame or multiple blocks with same channel ID
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must be used.
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- Time Base = Timestamp of first sample in frame
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The "Time Base" is used to rearange packets and to detect packet loss.
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The 16 bits are sent in network order (MSB first) and count 1/8000 th of a
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second. This causes a wrap around each 8,192 seconds. There is no requirement
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for the initial "Time Base", but 0 should be used for the first packet.
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In case of HDLC data, this timestamp counts the packet or byte number.
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Two Timers:
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After initialisation, a timer of 15 seconds is started. Whenever a packet is
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transmitted, the timer is reset to 15 seconds again. If the timer expires, an
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empty packet is transmitted. This keep the connection alive.
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When a valid packet is received, a timer 65 seconds is started. The interface
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become ACTIVE. If the timer expires, the interface becomes INACTIVE.
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Dynamic IP handling:
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To allow dynamic IP, the ID must be non 0. In this case, any packet with the
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correct port number and ID will be accepted. If the remote side changes its IP
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the new IP is used for all transmitted packets until it changes again.
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On Demand:
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If the ondemand parameter is given, the remote IP is set to 0 on timeout.
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This will stop keepalive traffic to remote. If the remote is online again,
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traffic will continue to the remote address. This is useful for road warriors.
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This feature only works with ID set, otherwhise it is highly unsecure.
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Socket and Thread
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-----------------
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The complete socket opening and closing is done by a thread.
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When the thread opened a socket, the hc->socket descriptor is set. Whenever a
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packet shall be sent to the socket, the hc->socket must be checked wheter not
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NULL. To prevent change in socket descriptor, the hc->socket_lock must be used.
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To change the socket, a recall of l1oip_socket_open() will safely kill the
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socket process and create a new one.
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*/
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#define L1OIP_VERSION 0 /* 0...3 */
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/mISDNif.h>
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#include <linux/mISDNhw.h>
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#include <linux/mISDNdsp.h>
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#include <linux/init.h>
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/workqueue.h>
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#include <linux/kthread.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include "core.h"
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#include "l1oip.h"
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static const char *l1oip_revision = "2.00";
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static int l1oip_cnt;
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static spinlock_t l1oip_lock;
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static struct list_head l1oip_ilist;
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#define MAX_CARDS 16
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static u_int type[MAX_CARDS];
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static u_int codec[MAX_CARDS];
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static u_int ip[MAX_CARDS * 4];
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static u_int port[MAX_CARDS];
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static u_int remoteport[MAX_CARDS];
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static u_int ondemand[MAX_CARDS];
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static u_int limit[MAX_CARDS];
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static u_int id[MAX_CARDS];
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static int debug;
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static int ulaw;
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MODULE_AUTHOR("Andreas Eversberg");
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MODULE_LICENSE("GPL");
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module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR);
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module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR);
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module_param(ulaw, uint, S_IRUGO | S_IWUSR);
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module_param(debug, uint, S_IRUGO | S_IWUSR);
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/*
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* send a frame via socket, if open and restart timer
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*/
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static int
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l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask,
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u16 timebase, u8 *buf, int len)
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{
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u8 *p;
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int multi = 0;
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u8 frame[len + 32];
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struct socket *socket = NULL;
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n",
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__func__, len);
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p = frame;
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/* restart timer */
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if ((int)(hc->keep_tl.expires-jiffies) < 5 * HZ) {
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del_timer(&hc->keep_tl);
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hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ;
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add_timer(&hc->keep_tl);
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} else
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hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ;
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: resetting timer\n", __func__);
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/* drop if we have no remote ip or port */
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if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) {
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: dropping frame, because remote "
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"IP is not set.\n", __func__);
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return len;
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}
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/* assemble frame */
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*p++ = (L1OIP_VERSION << 6) /* version and coding */
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| (hc->pri ? 0x20 : 0x00) /* type */
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| (hc->id ? 0x10 : 0x00) /* id */
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| localcodec;
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if (hc->id) {
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*p++ = hc->id >> 24; /* id */
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*p++ = hc->id >> 16;
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*p++ = hc->id >> 8;
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*p++ = hc->id;
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}
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*p++ = (multi == 1) ? 0x80 : 0x00 + channel; /* m-flag, channel */
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if (multi == 1)
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*p++ = len; /* length */
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*p++ = timebase >> 8; /* time base */
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*p++ = timebase;
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if (buf && len) { /* add data to frame */
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if (localcodec == 1 && ulaw)
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l1oip_ulaw_to_alaw(buf, len, p);
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else if (localcodec == 2 && !ulaw)
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l1oip_alaw_to_ulaw(buf, len, p);
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else if (localcodec == 3)
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len = l1oip_law_to_4bit(buf, len, p,
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&hc->chan[channel].codecstate);
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else
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memcpy(p, buf, len);
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}
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len += p - frame;
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/* check for socket in safe condition */
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spin_lock(&hc->socket_lock);
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if (!hc->socket) {
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spin_unlock(&hc->socket_lock);
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return 0;
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}
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/* seize socket */
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socket = hc->socket;
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hc->socket = NULL;
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spin_unlock(&hc->socket_lock);
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/* send packet */
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: sending packet to socket (len "
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"= %d)\n", __func__, len);
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hc->sendiov.iov_base = frame;
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hc->sendiov.iov_len = len;
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len = kernel_sendmsg(socket, &hc->sendmsg, &hc->sendiov, 1, len);
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/* give socket back */
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hc->socket = socket; /* no locking required */
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return len;
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}
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/*
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* receive channel data from socket
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*/
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static void
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l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase,
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u8 *buf, int len)
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{
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struct sk_buff *nskb;
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struct bchannel *bch;
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struct dchannel *dch;
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u8 *p;
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u32 rx_counter;
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if (len == 0) {
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: received empty keepalive data, "
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"ignoring\n", __func__);
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return;
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}
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n",
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__func__, len);
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if (channel < 1 || channel > 127) {
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printk(KERN_WARNING "%s: packet error - channel %d out of "
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"range\n", __func__, channel);
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return;
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}
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dch = hc->chan[channel].dch;
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bch = hc->chan[channel].bch;
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if (!dch && !bch) {
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printk(KERN_WARNING "%s: packet error - channel %d not in "
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"stack\n", __func__, channel);
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return;
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}
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/* prepare message */
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nskb = mI_alloc_skb((remotecodec == 3) ? (len << 1) : len, GFP_ATOMIC);
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if (!nskb) {
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printk(KERN_ERR "%s: No mem for skb.\n", __func__);
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return;
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}
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p = skb_put(nskb, (remotecodec == 3) ? (len << 1) : len);
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if (remotecodec == 1 && ulaw)
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l1oip_alaw_to_ulaw(buf, len, p);
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else if (remotecodec == 2 && !ulaw)
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l1oip_ulaw_to_alaw(buf, len, p);
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else if (remotecodec == 3)
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len = l1oip_4bit_to_law(buf, len, p);
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else
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memcpy(p, buf, len);
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/* send message up */
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if (dch && len >= 2) {
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dch->rx_skb = nskb;
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recv_Dchannel(dch);
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}
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if (bch) {
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/* expand 16 bit sequence number to 32 bit sequence number */
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rx_counter = hc->chan[channel].rx_counter;
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if (((s16)(timebase - rx_counter)) >= 0) {
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/* time has changed forward */
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if (timebase >= (rx_counter & 0xffff))
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rx_counter =
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(rx_counter & 0xffff0000) | timebase;
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else
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rx_counter = ((rx_counter & 0xffff0000) + 0x10000)
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| timebase;
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} else {
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/* time has changed backwards */
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if (timebase < (rx_counter & 0xffff))
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rx_counter =
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(rx_counter & 0xffff0000) | timebase;
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else
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rx_counter = ((rx_counter & 0xffff0000) - 0x10000)
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| timebase;
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}
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hc->chan[channel].rx_counter = rx_counter;
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#ifdef REORDER_DEBUG
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if (hc->chan[channel].disorder_flag) {
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struct sk_buff *skb;
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int cnt;
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skb = hc->chan[channel].disorder_skb;
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hc->chan[channel].disorder_skb = nskb;
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nskb = skb;
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cnt = hc->chan[channel].disorder_cnt;
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hc->chan[channel].disorder_cnt = rx_counter;
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rx_counter = cnt;
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}
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hc->chan[channel].disorder_flag ^= 1;
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if (nskb)
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#endif
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queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb);
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}
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}
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/*
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* parse frame and extract channel data
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*/
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static void
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l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len)
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{
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u32 packet_id;
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u8 channel;
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u8 remotecodec;
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u16 timebase;
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int m, mlen;
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int len_start = len; /* initial frame length */
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struct dchannel *dch = hc->chan[hc->d_idx].dch;
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if (debug & DEBUG_L1OIP_MSG)
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printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n",
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__func__, len);
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/* check length */
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if (len < 1 + 1 + 2) {
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printk(KERN_WARNING "%s: packet error - length %d below "
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"4 bytes\n", __func__, len);
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return;
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}
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/* check version */
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if (((*buf) >> 6) != L1OIP_VERSION) {
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printk(KERN_WARNING "%s: packet error - unknown version %d\n",
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__func__, buf[0]>>6);
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return;
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}
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/* check type */
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if (((*buf) & 0x20) && !hc->pri) {
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printk(KERN_WARNING "%s: packet error - received E1 packet "
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"on S0 interface\n", __func__);
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return;
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}
|
|
if (!((*buf) & 0x20) && hc->pri) {
|
|
printk(KERN_WARNING "%s: packet error - received S0 packet "
|
|
"on E1 interface\n", __func__);
|
|
return;
|
|
}
|
|
|
|
/* get id flag */
|
|
packet_id = (*buf >> 4) & 1;
|
|
|
|
/* check coding */
|
|
remotecodec = (*buf) & 0x0f;
|
|
if (remotecodec > 3) {
|
|
printk(KERN_WARNING "%s: packet error - remotecodec %d "
|
|
"unsupported\n", __func__, remotecodec);
|
|
return;
|
|
}
|
|
buf++;
|
|
len--;
|
|
|
|
/* check packet_id */
|
|
if (packet_id) {
|
|
if (!hc->id) {
|
|
printk(KERN_WARNING "%s: packet error - packet has id "
|
|
"0x%x, but we have not\n", __func__, packet_id);
|
|
return;
|
|
}
|
|
if (len < 4) {
|
|
printk(KERN_WARNING "%s: packet error - packet too "
|
|
"short for ID value\n", __func__);
|
|
return;
|
|
}
|
|
packet_id = (*buf++) << 24;
|
|
packet_id += (*buf++) << 16;
|
|
packet_id += (*buf++) << 8;
|
|
packet_id += (*buf++);
|
|
len -= 4;
|
|
|
|
if (packet_id != hc->id) {
|
|
printk(KERN_WARNING "%s: packet error - ID mismatch, "
|
|
"got 0x%x, we 0x%x\n",
|
|
__func__, packet_id, hc->id);
|
|
return;
|
|
}
|
|
} else {
|
|
if (hc->id) {
|
|
printk(KERN_WARNING "%s: packet error - packet has no "
|
|
"ID, but we have\n", __func__);
|
|
return;
|
|
}
|
|
}
|
|
|
|
multiframe:
|
|
if (len < 1) {
|
|
printk(KERN_WARNING "%s: packet error - packet too short, "
|
|
"channel expected at position %d.\n",
|
|
__func__, len-len_start + 1);
|
|
return;
|
|
}
|
|
|
|
/* get channel and multiframe flag */
|
|
channel = *buf & 0x7f;
|
|
m = *buf >> 7;
|
|
buf++;
|
|
len--;
|
|
|
|
/* check length on multiframe */
|
|
if (m) {
|
|
if (len < 1) {
|
|
printk(KERN_WARNING "%s: packet error - packet too "
|
|
"short, length expected at position %d.\n",
|
|
__func__, len_start - len - 1);
|
|
return;
|
|
}
|
|
|
|
mlen = *buf++;
|
|
len--;
|
|
if (mlen == 0)
|
|
mlen = 256;
|
|
if (len < mlen + 3) {
|
|
printk(KERN_WARNING "%s: packet error - length %d at "
|
|
"position %d exceeds total length %d.\n",
|
|
__func__, mlen, len_start-len - 1, len_start);
|
|
return;
|
|
}
|
|
if (len == mlen + 3) {
|
|
printk(KERN_WARNING "%s: packet error - length %d at "
|
|
"position %d will not allow additional "
|
|
"packet.\n",
|
|
__func__, mlen, len_start-len + 1);
|
|
return;
|
|
}
|
|
} else
|
|
mlen = len - 2; /* single frame, subtract timebase */
|
|
|
|
if (len < 2) {
|
|
printk(KERN_WARNING "%s: packet error - packet too short, time "
|
|
"base expected at position %d.\n",
|
|
__func__, len-len_start + 1);
|
|
return;
|
|
}
|
|
|
|
/* get time base */
|
|
timebase = (*buf++) << 8;
|
|
timebase |= (*buf++);
|
|
len -= 2;
|
|
|
|
/* if inactive, we send up a PH_ACTIVATE and activate */
|
|
if (!test_bit(FLG_ACTIVE, &dch->Flags)) {
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: interface become active due to "
|
|
"received packet\n", __func__);
|
|
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
|
|
_queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
|
|
NULL, GFP_ATOMIC);
|
|
}
|
|
|
|
/* distribute packet */
|
|
l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen);
|
|
buf += mlen;
|
|
len -= mlen;
|
|
|
|
/* multiframe */
|
|
if (m)
|
|
goto multiframe;
|
|
|
|
/* restart timer */
|
|
if ((int)(hc->timeout_tl.expires-jiffies) < 5 * HZ || !hc->timeout_on) {
|
|
hc->timeout_on = 1;
|
|
del_timer(&hc->timeout_tl);
|
|
hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ;
|
|
add_timer(&hc->timeout_tl);
|
|
} else /* only adjust timer */
|
|
hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ;
|
|
|
|
/* if ip or source port changes */
|
|
if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr)
|
|
|| (hc->sin_remote.sin_port != sin->sin_port)) {
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: remote address changes from "
|
|
"0x%08x to 0x%08x (port %d to %d)\n", __func__,
|
|
ntohl(hc->sin_remote.sin_addr.s_addr),
|
|
ntohl(sin->sin_addr.s_addr),
|
|
ntohs(hc->sin_remote.sin_port),
|
|
ntohs(sin->sin_port));
|
|
hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr;
|
|
hc->sin_remote.sin_port = sin->sin_port;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* socket stuff
|
|
*/
|
|
static int
|
|
l1oip_socket_thread(void *data)
|
|
{
|
|
struct l1oip *hc = (struct l1oip *)data;
|
|
int ret = 0;
|
|
struct msghdr msg;
|
|
struct sockaddr_in sin_rx;
|
|
unsigned char *recvbuf;
|
|
size_t recvbuf_size = 1500;
|
|
int recvlen;
|
|
struct socket *socket = NULL;
|
|
DECLARE_COMPLETION_ONSTACK(wait);
|
|
|
|
/* allocate buffer memory */
|
|
recvbuf = kmalloc(recvbuf_size, GFP_KERNEL);
|
|
if (!recvbuf) {
|
|
printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* make daemon */
|
|
allow_signal(SIGTERM);
|
|
|
|
/* create socket */
|
|
if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) {
|
|
printk(KERN_ERR "%s: Failed to create socket.\n", __func__);
|
|
ret = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
/* set incoming address */
|
|
hc->sin_local.sin_family = AF_INET;
|
|
hc->sin_local.sin_addr.s_addr = INADDR_ANY;
|
|
hc->sin_local.sin_port = htons((unsigned short)hc->localport);
|
|
|
|
/* set outgoing address */
|
|
hc->sin_remote.sin_family = AF_INET;
|
|
hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip);
|
|
hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport);
|
|
|
|
/* bind to incomming port */
|
|
if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local,
|
|
sizeof(hc->sin_local))) {
|
|
printk(KERN_ERR "%s: Failed to bind socket to port %d.\n",
|
|
__func__, hc->localport);
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
/* check sk */
|
|
if (socket->sk == NULL) {
|
|
printk(KERN_ERR "%s: socket->sk == NULL\n", __func__);
|
|
ret = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
/* build receive message */
|
|
msg.msg_name = &sin_rx;
|
|
msg.msg_namelen = sizeof(sin_rx);
|
|
msg.msg_control = NULL;
|
|
msg.msg_controllen = 0;
|
|
|
|
/* build send message */
|
|
hc->sendmsg.msg_name = &hc->sin_remote;
|
|
hc->sendmsg.msg_namelen = sizeof(hc->sin_remote);
|
|
hc->sendmsg.msg_control = NULL;
|
|
hc->sendmsg.msg_controllen = 0;
|
|
|
|
/* give away socket */
|
|
spin_lock(&hc->socket_lock);
|
|
hc->socket = socket;
|
|
spin_unlock(&hc->socket_lock);
|
|
|
|
/* read loop */
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: socket created and open\n",
|
|
__func__);
|
|
while (!signal_pending(current)) {
|
|
struct kvec iov = {
|
|
.iov_base = recvbuf,
|
|
.iov_len = recvbuf_size,
|
|
};
|
|
recvlen = kernel_recvmsg(socket, &msg, &iov, 1,
|
|
recvbuf_size, 0);
|
|
if (recvlen > 0) {
|
|
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
|
|
} else {
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_WARNING
|
|
"%s: broken pipe on socket\n", __func__);
|
|
}
|
|
}
|
|
|
|
/* get socket back, check first if in use, maybe by send function */
|
|
spin_lock(&hc->socket_lock);
|
|
/* if hc->socket is NULL, it is in use until it is given back */
|
|
while (!hc->socket) {
|
|
spin_unlock(&hc->socket_lock);
|
|
schedule_timeout(HZ / 10);
|
|
spin_lock(&hc->socket_lock);
|
|
}
|
|
hc->socket = NULL;
|
|
spin_unlock(&hc->socket_lock);
|
|
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: socket thread terminating\n",
|
|
__func__);
|
|
|
|
fail:
|
|
/* free recvbuf */
|
|
kfree(recvbuf);
|
|
|
|
/* close socket */
|
|
if (socket)
|
|
sock_release(socket);
|
|
|
|
/* if we got killed, signal completion */
|
|
complete(&hc->socket_complete);
|
|
hc->socket_thread = NULL; /* show termination of thread */
|
|
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: socket thread terminated\n",
|
|
__func__);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
l1oip_socket_close(struct l1oip *hc)
|
|
{
|
|
struct dchannel *dch = hc->chan[hc->d_idx].dch;
|
|
|
|
/* kill thread */
|
|
if (hc->socket_thread) {
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: socket thread exists, "
|
|
"killing...\n", __func__);
|
|
send_sig(SIGTERM, hc->socket_thread, 0);
|
|
wait_for_completion(&hc->socket_complete);
|
|
}
|
|
|
|
/* if active, we send up a PH_DEACTIVATE and deactivate */
|
|
if (test_bit(FLG_ACTIVE, &dch->Flags)) {
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: interface become deactivated "
|
|
"due to timeout\n", __func__);
|
|
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
|
|
_queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
|
|
NULL, GFP_ATOMIC);
|
|
}
|
|
}
|
|
|
|
static int
|
|
l1oip_socket_open(struct l1oip *hc)
|
|
{
|
|
/* in case of reopen, we need to close first */
|
|
l1oip_socket_close(hc);
|
|
|
|
init_completion(&hc->socket_complete);
|
|
|
|
/* create receive process */
|
|
hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s",
|
|
hc->name);
|
|
if (IS_ERR(hc->socket_thread)) {
|
|
int err = PTR_ERR(hc->socket_thread);
|
|
printk(KERN_ERR "%s: Failed (%d) to create socket process.\n",
|
|
__func__, err);
|
|
hc->socket_thread = NULL;
|
|
sock_release(hc->socket);
|
|
return err;
|
|
}
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: socket thread created\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
l1oip_send_bh(struct work_struct *work)
|
|
{
|
|
struct l1oip *hc = container_of(work, struct l1oip, workq);
|
|
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: keepalive timer expired, sending empty "
|
|
"frame on dchannel\n", __func__);
|
|
|
|
/* send an empty l1oip frame at D-channel */
|
|
l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* timer stuff
|
|
*/
|
|
static void
|
|
l1oip_keepalive(void *data)
|
|
{
|
|
struct l1oip *hc = (struct l1oip *)data;
|
|
|
|
schedule_work(&hc->workq);
|
|
}
|
|
|
|
static void
|
|
l1oip_timeout(void *data)
|
|
{
|
|
struct l1oip *hc = (struct l1oip *)data;
|
|
struct dchannel *dch = hc->chan[hc->d_idx].dch;
|
|
|
|
if (debug & DEBUG_L1OIP_MSG)
|
|
printk(KERN_DEBUG "%s: timeout timer expired, turn layer one "
|
|
"down.\n", __func__);
|
|
|
|
hc->timeout_on = 0; /* state that timer must be initialized next time */
|
|
|
|
/* if timeout, we send up a PH_DEACTIVATE and deactivate */
|
|
if (test_bit(FLG_ACTIVE, &dch->Flags)) {
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: interface become deactivated "
|
|
"due to timeout\n", __func__);
|
|
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
|
|
_queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
|
|
NULL, GFP_ATOMIC);
|
|
}
|
|
|
|
/* if we have ondemand set, we remove ip address */
|
|
if (hc->ondemand) {
|
|
if (debug & DEBUG_L1OIP_MSG)
|
|
printk(KERN_DEBUG "%s: on demand causes ip address to "
|
|
"be removed\n", __func__);
|
|
hc->sin_remote.sin_addr.s_addr = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* message handling
|
|
*/
|
|
static int
|
|
handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb)
|
|
{
|
|
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
|
|
struct dchannel *dch = container_of(dev, struct dchannel, dev);
|
|
struct l1oip *hc = dch->hw;
|
|
struct mISDNhead *hh = mISDN_HEAD_P(skb);
|
|
int ret = -EINVAL;
|
|
int l, ll;
|
|
unsigned char *p;
|
|
|
|
switch (hh->prim) {
|
|
case PH_DATA_REQ:
|
|
if (skb->len < 1) {
|
|
printk(KERN_WARNING "%s: skb too small\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) {
|
|
printk(KERN_WARNING "%s: skb too large\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
/* send frame */
|
|
p = skb->data;
|
|
l = skb->len;
|
|
while (l) {
|
|
ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME;
|
|
l1oip_socket_send(hc, 0, dch->slot, 0,
|
|
hc->chan[dch->slot].tx_counter++, p, ll);
|
|
p += ll;
|
|
l -= ll;
|
|
}
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
|
|
return 0;
|
|
case PH_ACTIVATE_REQ:
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n"
|
|
, __func__, dch->slot, hc->b_num + 1);
|
|
skb_trim(skb, 0);
|
|
if (test_bit(FLG_ACTIVE, &dch->Flags))
|
|
queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
|
|
else
|
|
queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
|
|
return 0;
|
|
case PH_DEACTIVATE_REQ:
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d "
|
|
"(1..%d)\n", __func__, dch->slot,
|
|
hc->b_num + 1);
|
|
skb_trim(skb, 0);
|
|
if (test_bit(FLG_ACTIVE, &dch->Flags))
|
|
queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
|
|
else
|
|
queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
|
|
return 0;
|
|
}
|
|
if (!ret)
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq)
|
|
{
|
|
int ret = 0;
|
|
struct l1oip *hc = dch->hw;
|
|
|
|
switch (cq->op) {
|
|
case MISDN_CTRL_GETOP:
|
|
cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER
|
|
| MISDN_CTRL_GETPEER;
|
|
break;
|
|
case MISDN_CTRL_SETPEER:
|
|
hc->remoteip = (u32)cq->p1;
|
|
hc->remoteport = cq->p2 & 0xffff;
|
|
hc->localport = cq->p2 >> 16;
|
|
if (!hc->remoteport)
|
|
hc->remoteport = hc->localport;
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: got new ip address from user "
|
|
"space.\n", __func__);
|
|
l1oip_socket_open(hc);
|
|
break;
|
|
case MISDN_CTRL_UNSETPEER:
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: removing ip address.\n",
|
|
__func__);
|
|
hc->remoteip = 0;
|
|
l1oip_socket_open(hc);
|
|
break;
|
|
case MISDN_CTRL_GETPEER:
|
|
if (debug & DEBUG_L1OIP_SOCKET)
|
|
printk(KERN_DEBUG "%s: getting ip address.\n",
|
|
__func__);
|
|
cq->p1 = hc->remoteip;
|
|
cq->p2 = hc->remoteport | (hc->localport << 16);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "%s: unknown Op %x\n",
|
|
__func__, cq->op);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq)
|
|
{
|
|
if (debug & DEBUG_HW_OPEN)
|
|
printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__,
|
|
dch->dev.id, __builtin_return_address(0));
|
|
if (rq->protocol == ISDN_P_NONE)
|
|
return -EINVAL;
|
|
if ((dch->dev.D.protocol != ISDN_P_NONE) &&
|
|
(dch->dev.D.protocol != rq->protocol)) {
|
|
if (debug & DEBUG_HW_OPEN)
|
|
printk(KERN_WARNING "%s: change protocol %x to %x\n",
|
|
__func__, dch->dev.D.protocol, rq->protocol);
|
|
}
|
|
if (dch->dev.D.protocol != rq->protocol)
|
|
dch->dev.D.protocol = rq->protocol;
|
|
|
|
if (test_bit(FLG_ACTIVE, &dch->Flags)) {
|
|
_queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY,
|
|
0, NULL, GFP_KERNEL);
|
|
}
|
|
rq->ch = &dch->dev.D;
|
|
if (!try_module_get(THIS_MODULE))
|
|
printk(KERN_WARNING "%s:cannot get module\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq)
|
|
{
|
|
struct bchannel *bch;
|
|
int ch;
|
|
|
|
if (!test_channelmap(rq->adr.channel, dch->dev.channelmap))
|
|
return -EINVAL;
|
|
if (rq->protocol == ISDN_P_NONE)
|
|
return -EINVAL;
|
|
ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */
|
|
bch = hc->chan[ch].bch;
|
|
if (!bch) {
|
|
printk(KERN_ERR "%s:internal error ch %d has no bch\n",
|
|
__func__, ch);
|
|
return -EINVAL;
|
|
}
|
|
if (test_and_set_bit(FLG_OPEN, &bch->Flags))
|
|
return -EBUSY; /* b-channel can be only open once */
|
|
bch->ch.protocol = rq->protocol;
|
|
rq->ch = &bch->ch;
|
|
if (!try_module_get(THIS_MODULE))
|
|
printk(KERN_WARNING "%s:cannot get module\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
|
|
{
|
|
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
|
|
struct dchannel *dch = container_of(dev, struct dchannel, dev);
|
|
struct l1oip *hc = dch->hw;
|
|
struct channel_req *rq;
|
|
int err = 0;
|
|
|
|
if (dch->debug & DEBUG_HW)
|
|
printk(KERN_DEBUG "%s: cmd:%x %p\n",
|
|
__func__, cmd, arg);
|
|
switch (cmd) {
|
|
case OPEN_CHANNEL:
|
|
rq = arg;
|
|
switch (rq->protocol) {
|
|
case ISDN_P_TE_S0:
|
|
case ISDN_P_NT_S0:
|
|
if (hc->pri) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err = open_dchannel(hc, dch, rq);
|
|
break;
|
|
case ISDN_P_TE_E1:
|
|
case ISDN_P_NT_E1:
|
|
if (!hc->pri) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err = open_dchannel(hc, dch, rq);
|
|
break;
|
|
default:
|
|
err = open_bchannel(hc, dch, rq);
|
|
}
|
|
break;
|
|
case CLOSE_CHANNEL:
|
|
if (debug & DEBUG_HW_OPEN)
|
|
printk(KERN_DEBUG "%s: dev(%d) close from %p\n",
|
|
__func__, dch->dev.id,
|
|
__builtin_return_address(0));
|
|
module_put(THIS_MODULE);
|
|
break;
|
|
case CONTROL_CHANNEL:
|
|
err = channel_dctrl(dch, arg);
|
|
break;
|
|
default:
|
|
if (dch->debug & DEBUG_HW)
|
|
printk(KERN_DEBUG "%s: unknown command %x\n",
|
|
__func__, cmd);
|
|
err = -EINVAL;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb)
|
|
{
|
|
struct bchannel *bch = container_of(ch, struct bchannel, ch);
|
|
struct l1oip *hc = bch->hw;
|
|
int ret = -EINVAL;
|
|
struct mISDNhead *hh = mISDN_HEAD_P(skb);
|
|
int l, ll;
|
|
unsigned char *p;
|
|
|
|
switch (hh->prim) {
|
|
case PH_DATA_REQ:
|
|
if (skb->len <= 0) {
|
|
printk(KERN_WARNING "%s: skb too small\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) {
|
|
printk(KERN_WARNING "%s: skb too large\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
/* check for AIS / ulaw-silence */
|
|
l = skb->len;
|
|
if (!memchr_inv(skb->data, 0xff, l)) {
|
|
if (debug & DEBUG_L1OIP_MSG)
|
|
printk(KERN_DEBUG "%s: got AIS, not sending, "
|
|
"but counting\n", __func__);
|
|
hc->chan[bch->slot].tx_counter += l;
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
|
|
return 0;
|
|
}
|
|
/* check for silence */
|
|
l = skb->len;
|
|
if (!memchr_inv(skb->data, 0x2a, l)) {
|
|
if (debug & DEBUG_L1OIP_MSG)
|
|
printk(KERN_DEBUG "%s: got silence, not sending"
|
|
", but counting\n", __func__);
|
|
hc->chan[bch->slot].tx_counter += l;
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
|
|
return 0;
|
|
}
|
|
|
|
/* send frame */
|
|
p = skb->data;
|
|
l = skb->len;
|
|
while (l) {
|
|
ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME;
|
|
l1oip_socket_send(hc, hc->codec, bch->slot, 0,
|
|
hc->chan[bch->slot].tx_counter, p, ll);
|
|
hc->chan[bch->slot].tx_counter += ll;
|
|
p += ll;
|
|
l -= ll;
|
|
}
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
|
|
return 0;
|
|
case PH_ACTIVATE_REQ:
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n"
|
|
, __func__, bch->slot, hc->b_num + 1);
|
|
hc->chan[bch->slot].codecstate = 0;
|
|
test_and_set_bit(FLG_ACTIVE, &bch->Flags);
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
|
|
return 0;
|
|
case PH_DEACTIVATE_REQ:
|
|
if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET))
|
|
printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d "
|
|
"(1..%d)\n", __func__, bch->slot,
|
|
hc->b_num + 1);
|
|
test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
|
|
skb_trim(skb, 0);
|
|
queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
|
|
return 0;
|
|
}
|
|
if (!ret)
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
|
|
{
|
|
int ret = 0;
|
|
struct dsp_features *features =
|
|
(struct dsp_features *)(*((u_long *)&cq->p1));
|
|
|
|
switch (cq->op) {
|
|
case MISDN_CTRL_GETOP:
|
|
cq->op = MISDN_CTRL_HW_FEATURES_OP;
|
|
break;
|
|
case MISDN_CTRL_HW_FEATURES: /* fill features structure */
|
|
if (debug & DEBUG_L1OIP_MSG)
|
|
printk(KERN_DEBUG "%s: HW_FEATURE request\n",
|
|
__func__);
|
|
/* create confirm */
|
|
features->unclocked = 1;
|
|
features->unordered = 1;
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "%s: unknown Op %x\n",
|
|
__func__, cq->op);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
l1oip_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
|
|
{
|
|
struct bchannel *bch = container_of(ch, struct bchannel, ch);
|
|
int err = -EINVAL;
|
|
|
|
if (bch->debug & DEBUG_HW)
|
|
printk(KERN_DEBUG "%s: cmd:%x %p\n",
|
|
__func__, cmd, arg);
|
|
switch (cmd) {
|
|
case CLOSE_CHANNEL:
|
|
test_and_clear_bit(FLG_OPEN, &bch->Flags);
|
|
test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
|
|
ch->protocol = ISDN_P_NONE;
|
|
ch->peer = NULL;
|
|
module_put(THIS_MODULE);
|
|
err = 0;
|
|
break;
|
|
case CONTROL_CHANNEL:
|
|
err = channel_bctrl(bch, arg);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "%s: unknown prim(%x)\n",
|
|
__func__, cmd);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* cleanup module and stack
|
|
*/
|
|
static void
|
|
release_card(struct l1oip *hc)
|
|
{
|
|
int ch;
|
|
|
|
if (timer_pending(&hc->keep_tl))
|
|
del_timer(&hc->keep_tl);
|
|
|
|
if (timer_pending(&hc->timeout_tl))
|
|
del_timer(&hc->timeout_tl);
|
|
|
|
cancel_work_sync(&hc->workq);
|
|
|
|
if (hc->socket_thread)
|
|
l1oip_socket_close(hc);
|
|
|
|
if (hc->registered && hc->chan[hc->d_idx].dch)
|
|
mISDN_unregister_device(&hc->chan[hc->d_idx].dch->dev);
|
|
for (ch = 0; ch < 128; ch++) {
|
|
if (hc->chan[ch].dch) {
|
|
mISDN_freedchannel(hc->chan[ch].dch);
|
|
kfree(hc->chan[ch].dch);
|
|
}
|
|
if (hc->chan[ch].bch) {
|
|
mISDN_freebchannel(hc->chan[ch].bch);
|
|
kfree(hc->chan[ch].bch);
|
|
#ifdef REORDER_DEBUG
|
|
if (hc->chan[ch].disorder_skb)
|
|
dev_kfree_skb(hc->chan[ch].disorder_skb);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
spin_lock(&l1oip_lock);
|
|
list_del(&hc->list);
|
|
spin_unlock(&l1oip_lock);
|
|
|
|
kfree(hc);
|
|
}
|
|
|
|
static void
|
|
l1oip_cleanup(void)
|
|
{
|
|
struct l1oip *hc, *next;
|
|
|
|
list_for_each_entry_safe(hc, next, &l1oip_ilist, list)
|
|
release_card(hc);
|
|
|
|
l1oip_4bit_free();
|
|
}
|
|
|
|
|
|
/*
|
|
* module and stack init
|
|
*/
|
|
static int
|
|
init_card(struct l1oip *hc, int pri, int bundle)
|
|
{
|
|
struct dchannel *dch;
|
|
struct bchannel *bch;
|
|
int ret;
|
|
int i, ch;
|
|
|
|
spin_lock_init(&hc->socket_lock);
|
|
hc->idx = l1oip_cnt;
|
|
hc->pri = pri;
|
|
hc->d_idx = pri ? 16 : 3;
|
|
hc->b_num = pri ? 30 : 2;
|
|
hc->bundle = bundle;
|
|
if (hc->pri)
|
|
sprintf(hc->name, "l1oip-e1.%d", l1oip_cnt + 1);
|
|
else
|
|
sprintf(hc->name, "l1oip-s0.%d", l1oip_cnt + 1);
|
|
|
|
switch (codec[l1oip_cnt]) {
|
|
case 0: /* as is */
|
|
case 1: /* alaw */
|
|
case 2: /* ulaw */
|
|
case 3: /* 4bit */
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Codec(%d) not supported.\n",
|
|
codec[l1oip_cnt]);
|
|
return -EINVAL;
|
|
}
|
|
hc->codec = codec[l1oip_cnt];
|
|
if (debug & DEBUG_L1OIP_INIT)
|
|
printk(KERN_DEBUG "%s: using codec %d\n",
|
|
__func__, hc->codec);
|
|
|
|
if (id[l1oip_cnt] == 0) {
|
|
printk(KERN_WARNING "Warning: No 'id' value given or "
|
|
"0, this is highly unsecure. Please use 32 "
|
|
"bit randmom number 0x...\n");
|
|
}
|
|
hc->id = id[l1oip_cnt];
|
|
if (debug & DEBUG_L1OIP_INIT)
|
|
printk(KERN_DEBUG "%s: using id 0x%x\n", __func__, hc->id);
|
|
|
|
hc->ondemand = ondemand[l1oip_cnt];
|
|
if (hc->ondemand && !hc->id) {
|
|
printk(KERN_ERR "%s: ondemand option only allowed in "
|
|
"conjunction with non 0 ID\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (limit[l1oip_cnt])
|
|
hc->b_num = limit[l1oip_cnt];
|
|
if (!pri && hc->b_num > 2) {
|
|
printk(KERN_ERR "Maximum limit for BRI interface is 2 "
|
|
"channels.\n");
|
|
return -EINVAL;
|
|
}
|
|
if (pri && hc->b_num > 126) {
|
|
printk(KERN_ERR "Maximum limit for PRI interface is 126 "
|
|
"channels.\n");
|
|
return -EINVAL;
|
|
}
|
|
if (pri && hc->b_num > 30) {
|
|
printk(KERN_WARNING "Maximum limit for BRI interface is 30 "
|
|
"channels.\n");
|
|
printk(KERN_WARNING "Your selection of %d channels must be "
|
|
"supported by application.\n", hc->limit);
|
|
}
|
|
|
|
hc->remoteip = ip[l1oip_cnt << 2] << 24
|
|
| ip[(l1oip_cnt << 2) + 1] << 16
|
|
| ip[(l1oip_cnt << 2) + 2] << 8
|
|
| ip[(l1oip_cnt << 2) + 3];
|
|
hc->localport = port[l1oip_cnt]?:(L1OIP_DEFAULTPORT + l1oip_cnt);
|
|
if (remoteport[l1oip_cnt])
|
|
hc->remoteport = remoteport[l1oip_cnt];
|
|
else
|
|
hc->remoteport = hc->localport;
|
|
if (debug & DEBUG_L1OIP_INIT)
|
|
printk(KERN_DEBUG "%s: using local port %d remote ip "
|
|
"%d.%d.%d.%d port %d ondemand %d\n", __func__,
|
|
hc->localport, hc->remoteip >> 24,
|
|
(hc->remoteip >> 16) & 0xff,
|
|
(hc->remoteip >> 8) & 0xff, hc->remoteip & 0xff,
|
|
hc->remoteport, hc->ondemand);
|
|
|
|
dch = kzalloc(sizeof(struct dchannel), GFP_KERNEL);
|
|
if (!dch)
|
|
return -ENOMEM;
|
|
dch->debug = debug;
|
|
mISDN_initdchannel(dch, MAX_DFRAME_LEN_L1, NULL);
|
|
dch->hw = hc;
|
|
if (pri)
|
|
dch->dev.Dprotocols = (1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1);
|
|
else
|
|
dch->dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0);
|
|
dch->dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
|
|
(1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
|
|
dch->dev.D.send = handle_dmsg;
|
|
dch->dev.D.ctrl = l1oip_dctrl;
|
|
dch->dev.nrbchan = hc->b_num;
|
|
dch->slot = hc->d_idx;
|
|
hc->chan[hc->d_idx].dch = dch;
|
|
i = 1;
|
|
for (ch = 0; ch < dch->dev.nrbchan; ch++) {
|
|
if (ch == 15)
|
|
i++;
|
|
bch = kzalloc(sizeof(struct bchannel), GFP_KERNEL);
|
|
if (!bch) {
|
|
printk(KERN_ERR "%s: no memory for bchannel\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
bch->nr = i + ch;
|
|
bch->slot = i + ch;
|
|
bch->debug = debug;
|
|
mISDN_initbchannel(bch, MAX_DATA_MEM, 0);
|
|
bch->hw = hc;
|
|
bch->ch.send = handle_bmsg;
|
|
bch->ch.ctrl = l1oip_bctrl;
|
|
bch->ch.nr = i + ch;
|
|
list_add(&bch->ch.list, &dch->dev.bchannels);
|
|
hc->chan[i + ch].bch = bch;
|
|
set_channelmap(bch->nr, dch->dev.channelmap);
|
|
}
|
|
/* TODO: create a parent device for this driver */
|
|
ret = mISDN_register_device(&dch->dev, NULL, hc->name);
|
|
if (ret)
|
|
return ret;
|
|
hc->registered = 1;
|
|
|
|
if (debug & DEBUG_L1OIP_INIT)
|
|
printk(KERN_DEBUG "%s: Setting up network card(%d)\n",
|
|
__func__, l1oip_cnt + 1);
|
|
ret = l1oip_socket_open(hc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
hc->keep_tl.function = (void *)l1oip_keepalive;
|
|
hc->keep_tl.data = (ulong)hc;
|
|
init_timer(&hc->keep_tl);
|
|
hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */
|
|
add_timer(&hc->keep_tl);
|
|
|
|
hc->timeout_tl.function = (void *)l1oip_timeout;
|
|
hc->timeout_tl.data = (ulong)hc;
|
|
init_timer(&hc->timeout_tl);
|
|
hc->timeout_on = 0; /* state that we have timer off */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
l1oip_init(void)
|
|
{
|
|
int pri, bundle;
|
|
struct l1oip *hc;
|
|
int ret;
|
|
|
|
printk(KERN_INFO "mISDN: Layer-1-over-IP driver Rev. %s\n",
|
|
l1oip_revision);
|
|
|
|
INIT_LIST_HEAD(&l1oip_ilist);
|
|
spin_lock_init(&l1oip_lock);
|
|
|
|
if (l1oip_4bit_alloc(ulaw))
|
|
return -ENOMEM;
|
|
|
|
l1oip_cnt = 0;
|
|
while (l1oip_cnt < MAX_CARDS && type[l1oip_cnt]) {
|
|
switch (type[l1oip_cnt] & 0xff) {
|
|
case 1:
|
|
pri = 0;
|
|
bundle = 0;
|
|
break;
|
|
case 2:
|
|
pri = 1;
|
|
bundle = 0;
|
|
break;
|
|
case 3:
|
|
pri = 0;
|
|
bundle = 1;
|
|
break;
|
|
case 4:
|
|
pri = 1;
|
|
bundle = 1;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Card type(%d) not supported.\n",
|
|
type[l1oip_cnt] & 0xff);
|
|
l1oip_cleanup();
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (debug & DEBUG_L1OIP_INIT)
|
|
printk(KERN_DEBUG "%s: interface %d is %s with %s.\n",
|
|
__func__, l1oip_cnt, pri ? "PRI" : "BRI",
|
|
bundle ? "bundled IP packet for all B-channels" :
|
|
"separate IP packets for every B-channel");
|
|
|
|
hc = kzalloc(sizeof(struct l1oip), GFP_ATOMIC);
|
|
if (!hc) {
|
|
printk(KERN_ERR "No kmem for L1-over-IP driver.\n");
|
|
l1oip_cleanup();
|
|
return -ENOMEM;
|
|
}
|
|
INIT_WORK(&hc->workq, (void *)l1oip_send_bh);
|
|
|
|
spin_lock(&l1oip_lock);
|
|
list_add_tail(&hc->list, &l1oip_ilist);
|
|
spin_unlock(&l1oip_lock);
|
|
|
|
ret = init_card(hc, pri, bundle);
|
|
if (ret) {
|
|
l1oip_cleanup();
|
|
return ret;
|
|
}
|
|
|
|
l1oip_cnt++;
|
|
}
|
|
printk(KERN_INFO "%d virtual devices registered\n", l1oip_cnt);
|
|
return 0;
|
|
}
|
|
|
|
module_init(l1oip_init);
|
|
module_exit(l1oip_cleanup);
|