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1506 lines
39 KiB
1506 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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|
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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 ([email protected]) |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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- Ver = Version |
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If version is missmatch, the frame must be ignored. |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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 <linux/sched/signal.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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u8 frame[MAX_DFRAME_LEN_L1 + 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 (time_before(hc->keep_tl.expires, jiffies + 5 * HZ)) |
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mod_timer(&hc->keep_tl, jiffies + L1OIP_KEEPALIVE * HZ); |
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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++ = 0x00 + channel; /* m-flag, channel */ |
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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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|
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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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|
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#ifdef REORDER_DEBUG |
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if (hc->chan[channel].disorder_flag) { |
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swap(hc->chan[channel].disorder_skb, nskb); |
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swap(hc->chan[channel].disorder_cnt, rx_counter); |
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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} |
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if (!((*buf) & 0x20) && hc->pri) { |
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printk(KERN_WARNING "%s: packet error - received S0 packet " |
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"on E1 interface\n", __func__); |
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return; |
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} |
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|
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/* get id flag */ |
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packet_id = (*buf >> 4) & 1; |
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|
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/* check coding */ |
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remotecodec = (*buf) & 0x0f; |
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if (remotecodec > 3) { |
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printk(KERN_WARNING "%s: packet error - remotecodec %d " |
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"unsupported\n", __func__, remotecodec); |
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return; |
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} |
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buf++; |
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len--; |
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|
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/* check packet_id */ |
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if (packet_id) { |
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if (!hc->id) { |
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printk(KERN_WARNING "%s: packet error - packet has id " |
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"0x%x, but we have not\n", __func__, packet_id); |
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return; |
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} |
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if (len < 4) { |
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printk(KERN_WARNING "%s: packet error - packet too " |
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"short for ID value\n", __func__); |
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return; |
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} |
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packet_id = (*buf++) << 24; |
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packet_id += (*buf++) << 16; |
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packet_id += (*buf++) << 8; |
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packet_id += (*buf++); |
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len -= 4; |
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|
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if (packet_id != hc->id) { |
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printk(KERN_WARNING "%s: packet error - ID mismatch, " |
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"got 0x%x, we 0x%x\n", |
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__func__, packet_id, hc->id); |
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return; |
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} |
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} else { |
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if (hc->id) { |
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printk(KERN_WARNING "%s: packet error - packet has no " |
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"ID, but we have\n", __func__); |
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return; |
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} |
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} |
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|
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multiframe: |
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if (len < 1) { |
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printk(KERN_WARNING "%s: packet error - packet too short, " |
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"channel expected at position %d.\n", |
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__func__, len-len_start + 1); |
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return; |
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} |
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|
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/* get channel and multiframe flag */ |
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channel = *buf & 0x7f; |
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m = *buf >> 7; |
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buf++; |
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len--; |
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|
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/* check length on multiframe */ |
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if (m) { |
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if (len < 1) { |
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printk(KERN_WARNING "%s: packet error - packet too " |
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"short, length expected at position %d.\n", |
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__func__, len_start - len - 1); |
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return; |
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} |
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|
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mlen = *buf++; |
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len--; |
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if (mlen == 0) |
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mlen = 256; |
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if (len < mlen + 3) { |
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printk(KERN_WARNING "%s: packet error - length %d at " |
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"position %d exceeds total length %d.\n", |
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__func__, mlen, len_start-len - 1, len_start); |
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return; |
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} |
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if (len == mlen + 3) { |
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printk(KERN_WARNING "%s: packet error - length %d at " |
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"position %d will not allow additional " |
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"packet.\n", |
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__func__, mlen, len_start-len + 1); |
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return; |
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} |
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} else |
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mlen = len - 2; /* single frame, subtract timebase */ |
|
|
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if (len < 2) { |
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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 (time_before(hc->timeout_tl.expires, jiffies + 5 * HZ) || !hc->timeout_on) { |
|
hc->timeout_on = 1; |
|
mod_timer(&hc->timeout_tl, jiffies + L1OIP_TIMEOUT * HZ); |
|
} 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 sockaddr_in sin_rx; |
|
struct kvec iov; |
|
struct msghdr msg = {.msg_name = &sin_rx, |
|
.msg_namelen = sizeof(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; |
|
} |
|
|
|
iov.iov_base = recvbuf; |
|
iov.iov_len = recvbuf_size; |
|
|
|
/* 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 incoming 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 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)) { |
|
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, recvbuf_size); |
|
recvlen = sock_recvmsg(socket, &msg, 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(struct timer_list *t) |
|
{ |
|
struct l1oip *hc = from_timer(hc, t, keep_tl); |
|
|
|
schedule_work(&hc->workq); |
|
} |
|
|
|
static void |
|
l1oip_timeout(struct timer_list *t) |
|
{ |
|
struct l1oip *hc = from_timer(hc, t, |
|
timeout_tl); |
|
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) { |
|
/* |
|
* This is technically bounded by L1OIP_MAX_PERFRAME but |
|
* MAX_DFRAME_LEN_L1 < L1OIP_MAX_PERFRAME |
|
*/ |
|
ll = (l < MAX_DFRAME_LEN_L1) ? l : MAX_DFRAME_LEN_L1; |
|
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) { |
|
/* |
|
* This is technically bounded by L1OIP_MAX_PERFRAME but |
|
* MAX_DFRAME_LEN_L1 < L1OIP_MAX_PERFRAME |
|
*/ |
|
ll = (l < MAX_DFRAME_LEN_L1) ? l : MAX_DFRAME_LEN_L1; |
|
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 |
|
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 random 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; |
|
|
|
timer_setup(&hc->keep_tl, l1oip_keepalive, 0); |
|
hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */ |
|
add_timer(&hc->keep_tl); |
|
|
|
timer_setup(&hc->timeout_tl, l1oip_timeout, 0); |
|
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);
|
|
|