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@@ -0,0 +1,1518 @@
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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 (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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+
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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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+
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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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+
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+
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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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+
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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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+
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+
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+L1oIP-Protocol
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+--------------
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+
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+Frame Header:
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+
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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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+| |
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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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+
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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 arround 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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+
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+
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+Two Timers:
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+
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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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+
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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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+
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+
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+Dynamic IP handling:
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+
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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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+
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+
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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 usefull for road warriors.
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+This feature only works with ID set, otherwhise it is highly unsecure.
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+
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+
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+Socket and Thread
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+-----------------
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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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+*/
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+
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+#define L1OIP_VERSION 0 /* 0...3 */
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+
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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 <net/sock.h>
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+#include "core.h"
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+#include "l1oip.h"
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+
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+static const char *l1oip_revision = "2.00";
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+
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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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+
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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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+
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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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+/*
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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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+ mm_segment_t oldfs;
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+
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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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+
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+ p = frame;
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+
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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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+
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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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+
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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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+
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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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+
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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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+ oldfs = get_fs();
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+ set_fs(KERNEL_DS);
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+ len = sock_sendmsg(socket, &hc->sendmsg, len);
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+ set_fs(oldfs);
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+ /* give socket back */
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+ hc->socket = socket; /* no locking required */
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+
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+ return len;
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+}
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+
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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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+
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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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+
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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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+
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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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+
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|
|
+ /* prepare message */
|
|
|
+ nskb = mI_alloc_skb((remotecodec == 3)?(len<<1):len, GFP_ATOMIC);
|
|
|
+ if (!nskb) {
|
|
|
+ printk(KERN_ERR "%s: No mem for skb.\n", __func__);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ p = skb_put(nskb, (remotecodec == 3)?(len<<1):len);
|
|
|
+
|
|
|
+ if (remotecodec == 1 && ulaw)
|
|
|
+ l1oip_alaw_to_ulaw(buf, len, p);
|
|
|
+ else if (remotecodec == 2 && !ulaw)
|
|
|
+ l1oip_ulaw_to_alaw(buf, len, p);
|
|
|
+ else if (remotecodec == 3)
|
|
|
+ len = l1oip_4bit_to_law(buf, len, p);
|
|
|
+ else
|
|
|
+ memcpy(p, buf, len);
|
|
|
+
|
|
|
+ /* send message up */
|
|
|
+ if (dch && len >= 2) {
|
|
|
+ dch->rx_skb = nskb;
|
|
|
+ recv_Dchannel(dch);
|
|
|
+ }
|
|
|
+ if (bch) {
|
|
|
+ /* expand 16 bit sequence number to 32 bit sequence number */
|
|
|
+ rx_counter = hc->chan[channel].rx_counter;
|
|
|
+ if (((s16)(timebase - rx_counter)) >= 0) {
|
|
|
+ /* time has changed forward */
|
|
|
+ if (timebase >= (rx_counter & 0xffff))
|
|
|
+ rx_counter =
|
|
|
+ (rx_counter & 0xffff0000) | timebase;
|
|
|
+ else
|
|
|
+ rx_counter = ((rx_counter & 0xffff0000)+0x10000)
|
|
|
+ | timebase;
|
|
|
+ } else {
|
|
|
+ /* time has changed backwards */
|
|
|
+ if (timebase < (rx_counter & 0xffff))
|
|
|
+ rx_counter =
|
|
|
+ (rx_counter & 0xffff0000) | timebase;
|
|
|
+ else
|
|
|
+ rx_counter = ((rx_counter & 0xffff0000)-0x10000)
|
|
|
+ | timebase;
|
|
|
+ }
|
|
|
+ hc->chan[channel].rx_counter = rx_counter;
|
|
|
+
|
|
|
+#ifdef REORDER_DEBUG
|
|
|
+ if (hc->chan[channel].disorder_flag) {
|
|
|
+ struct sk_buff *skb;
|
|
|
+ int cnt;
|
|
|
+ skb = hc->chan[channel].disorder_skb;
|
|
|
+ hc->chan[channel].disorder_skb = nskb;
|
|
|
+ nskb = skb;
|
|
|
+ cnt = hc->chan[channel].disorder_cnt;
|
|
|
+ hc->chan[channel].disorder_cnt = rx_counter;
|
|
|
+ rx_counter = cnt;
|
|
|
+ }
|
|
|
+ hc->chan[channel].disorder_flag ^= 1;
|
|
|
+ if (nskb)
|
|
|
+#endif
|
|
|
+ queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/*
|
|
|
+ * parse frame and extract channel data
|
|
|
+ */
|
|
|
+static void
|
|
|
+l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len)
|
|
|
+{
|
|
|
+ u32 id;
|
|
|
+ u8 channel;
|
|
|
+ u8 remotecodec;
|
|
|
+ u16 timebase;
|
|
|
+ int m, mlen;
|
|
|
+ int len_start = len; /* initial frame length */
|
|
|
+ struct dchannel *dch = hc->chan[hc->d_idx].dch;
|
|
|
+
|
|
|
+ if (debug & DEBUG_L1OIP_MSG)
|
|
|
+ printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n",
|
|
|
+ __func__, len);
|
|
|
+
|
|
|
+ /* check lenght */
|
|
|
+ if (len < 1+1+2) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - length %d below "
|
|
|
+ "4 bytes\n", __func__, len);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* check version */
|
|
|
+ if (((*buf)>>6) != L1OIP_VERSION) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - unknown version %d\n",
|
|
|
+ __func__, buf[0]>>6);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* check type */
|
|
|
+ if (((*buf)&0x20) && !hc->pri) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - received E1 packet "
|
|
|
+ "on S0 interface\n", __func__);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ if (!((*buf)&0x20) && hc->pri) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - received S0 packet "
|
|
|
+ "on E1 interface\n", __func__);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* get id flag */
|
|
|
+ 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 id */
|
|
|
+ if (id) {
|
|
|
+ if (!hc->id) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - packet has id "
|
|
|
+ "0x%x, but we have not\n", __func__, id);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ if (len < 4) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - packet too "
|
|
|
+ "short for ID value\n", __func__);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ id = (*buf++) << 24;
|
|
|
+ id += (*buf++) << 16;
|
|
|
+ id += (*buf++) << 8;
|
|
|
+ id += (*buf++);
|
|
|
+ len -= 4;
|
|
|
+
|
|
|
+ if (id != hc->id) {
|
|
|
+ printk(KERN_WARNING "%s: packet error - ID mismatch, "
|
|
|
+ "got 0x%x, we 0x%x\n",
|
|
|
+ __func__, 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, substract 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 iovec iov;
|
|
|
+ mm_segment_t oldfs;
|
|
|
+ struct sockaddr_in sin_rx;
|
|
|
+ unsigned char recvbuf[1500];
|
|
|
+ int recvlen;
|
|
|
+ struct socket *socket = NULL;
|
|
|
+ DECLARE_COMPLETION(wait);
|
|
|
+
|
|
|
+ /* 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__);
|
|
|
+ return -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* 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;
|
|
|
+ msg.msg_iov = &iov;
|
|
|
+ msg.msg_iovlen = 1;
|
|
|
+
|
|
|
+ /* 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;
|
|
|
+ hc->sendmsg.msg_iov = &hc->sendiov;
|
|
|
+ hc->sendmsg.msg_iovlen = 1;
|
|
|
+
|
|
|
+ /* 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.iov_base = recvbuf;
|
|
|
+ iov.iov_len = sizeof(recvbuf);
|
|
|
+ oldfs = get_fs();
|
|
|
+ set_fs(KERNEL_DS);
|
|
|
+ recvlen = sock_recvmsg(socket, &msg, sizeof(recvbuf), 0);
|
|
|
+ set_fs(oldfs);
|
|
|
+ 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:
|
|
|
+ /* 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)
|
|
|
+{
|
|
|
+ /* 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);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+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;
|
|
|
+ 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;
|
|
|
+ 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_bit(rq->adr.channel & 0x1f,
|
|
|
+ &dch->dev.channelmap[rq->adr.channel >> 5]))
|
|
|
+ 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, i;
|
|
|
+ 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 */
|
|
|
+ p = skb->data;
|
|
|
+ l = skb->len;
|
|
|
+ for (i = 0; i < l; i++) {
|
|
|
+ if (*p++ != 0xff)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (i == 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 */
|
|
|
+ p = skb->data;
|
|
|
+ l = skb->len;
|
|
|
+ for (i = 0; i < l; i++) {
|
|
|
+ if (*p++ != 0x2a)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (i == 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);
|
|
|
+
|
|
|
+ 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);
|
|
|
+ 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;
|
|
|
+ test_and_set_bit(bch->nr & 0x1f,
|
|
|
+ &dch->dev.channelmap[bch->nr >> 5]);
|
|
|
+ }
|
|
|
+ ret = mISDN_register_device(&dch->dev, 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 (type[l1oip_cnt] && l1oip_cnt < MAX_CARDS) {
|
|
|
+ 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"
|
|
|
+ :"seperate 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);
|
|
|
+
|
Karsten Keil