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authorKarsten Keil <kkeil@suse.de>2008-07-26 20:02:10 -0400
committerKarsten Keil <kkeil@suse.de>2008-07-26 20:02:10 -0400
commit3712b42d4b1bec29a4232a6673bf2e6dcc5faa68 (patch)
treeb00ed0696e336c26daf6ec52cefee6d59eb89691
parentaf69fb3a8ffa37e986db00ed93099dc44babeef4 (diff)
Add layer1 over IP support
Implement a ISDN over IP tunnel to use mISDN hardware on remote locations. Signed-off-by: Karsten Keil <kkeil@suse.de>
Diffstat
-rw-r--r--drivers/isdn/mISDN/Kconfig19
-rw-r--r--drivers/isdn/mISDN/Makefile2
-rw-r--r--drivers/isdn/mISDN/l1oip.h91
-rw-r--r--drivers/isdn/mISDN/l1oip_codec.c374
-rw-r--r--drivers/isdn/mISDN/l1oip_core.c1518
5 files changed, 2003 insertions, 1 deletions
diff --git a/drivers/isdn/mISDN/Kconfig b/drivers/isdn/mISDN/Kconfig
index 6a97e86e7f21..4938355c4072 100644
--- a/drivers/isdn/mISDN/Kconfig
+++ b/drivers/isdn/mISDN/Kconfig
@@ -23,5 +23,22 @@ config MISDN_DSP
23 and get more informations about this module and it's usage. 23 and get more informations about this module and it's usage.
24 If unsure, say 'N'. 24 If unsure, say 'N'.
25 25
26 source "drivers/isdn/hardware/mISDN/Kconfig" 26config MISDN_L1OIP
27 tristate "ISDN over IP tunnel"
28 depends on MISDN
29 help
30 Enable support for ISDN over IP tunnel.
31
32 It features:
33 - dynamic IP exchange, if one or both peers have dynamic IPs
34 - BRI (S0) and PRI (S2M) interface
35 - layer 1 control via network keepalive frames
36 - direct tunneling of physical interface via IP
37
38 NOTE: This protocol is called 'Layer 1 over IP' and is not
39 compatible with ISDNoIP (Agfeo) or TDMoIP. Protocol description is
40 provided in the source code.
41
42source "drivers/isdn/hardware/mISDN/Kconfig"
43
27endif #MISDN 44endif #MISDN
diff --git a/drivers/isdn/mISDN/Makefile b/drivers/isdn/mISDN/Makefile
index 7f1a21804208..1cb5e633cf75 100644
--- a/drivers/isdn/mISDN/Makefile
+++ b/drivers/isdn/mISDN/Makefile
@@ -4,8 +4,10 @@
4 4
5obj-$(CONFIG_MISDN) += mISDN_core.o 5obj-$(CONFIG_MISDN) += mISDN_core.o
6obj-$(CONFIG_MISDN_DSP) += mISDN_dsp.o 6obj-$(CONFIG_MISDN_DSP) += mISDN_dsp.o
7obj-$(CONFIG_MISDN_L1OIP) += l1oip.o
7 8
8# multi objects 9# multi objects
9 10
10mISDN_core-objs := core.o fsm.o socket.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o 11mISDN_core-objs := core.o fsm.o socket.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o
11mISDN_dsp-objs := dsp_core.o dsp_cmx.o dsp_tones.o dsp_dtmf.o dsp_audio.o dsp_blowfish.o dsp_pipeline.o dsp_hwec.o 12mISDN_dsp-objs := dsp_core.o dsp_cmx.o dsp_tones.o dsp_dtmf.o dsp_audio.o dsp_blowfish.o dsp_pipeline.o dsp_hwec.o
13l1oip-objs := l1oip_core.o l1oip_codec.o
diff --git a/drivers/isdn/mISDN/l1oip.h b/drivers/isdn/mISDN/l1oip.h
new file mode 100644
index 000000000000..a23d575449f6
--- /dev/null
+++ b/drivers/isdn/mISDN/l1oip.h
@@ -0,0 +1,91 @@
1/*
2 * see notice in l1oip.c
3 */
4
5/* debugging */
6#define DEBUG_L1OIP_INIT 0x00010000
7#define DEBUG_L1OIP_SOCKET 0x00020000
8#define DEBUG_L1OIP_MGR 0x00040000
9#define DEBUG_L1OIP_MSG 0x00080000
10
11/* enable to disorder received bchannels by sequence 2143658798... */
12/*
13#define REORDER_DEBUG
14*/
15
16/* frames */
17#define L1OIP_MAX_LEN 2048 /* max packet size form l2 */
18#define L1OIP_MAX_PERFRAME 1400 /* max data size in one frame */
19
20
21/* timers */
22#define L1OIP_KEEPALIVE 15
23#define L1OIP_TIMEOUT 65
24
25
26/* socket */
27#define L1OIP_DEFAULTPORT 931
28
29
30/* channel structure */
31struct l1oip_chan {
32 struct dchannel *dch;
33 struct bchannel *bch;
34 u32 tx_counter; /* counts xmit bytes/packets */
35 u32 rx_counter; /* counts recv bytes/packets */
36 u32 codecstate; /* used by codec to save data */
37#ifdef REORDER_DEBUG
38 int disorder_flag;
39 struct sk_buff *disorder_skb;
40 u32 disorder_cnt;
41#endif
42};
43
44
45/* card structure */
46struct l1oip {
47 struct list_head list;
48
49 /* card */
50 int registered; /* if registered with mISDN */
51 char name[MISDN_MAX_IDLEN];
52 int idx; /* card index */
53 int pri; /* 1=pri, 0=bri */
54 int d_idx; /* current dchannel number */
55 int b_num; /* number of bchannels */
56 u32 id; /* id of connection */
57 int ondemand; /* if transmis. is on demand */
58 int bundle; /* bundle channels in one frm */
59 int codec; /* codec to use for transmis. */
60 int limit; /* limit number of bchannels */
61
62 /* timer */
63 struct timer_list keep_tl;
64 struct timer_list timeout_tl;
65 int timeout_on;
66 struct work_struct workq;
67
68 /* socket */
69 struct socket *socket; /* if set, socket is created */
70 struct completion socket_complete;/* completion of sock thread */
71 struct task_struct *socket_thread;
72 spinlock_t socket_lock; /* access sock outside thread */
73 u32 remoteip; /* if all set, ip is assigned */
74 u16 localport; /* must always be set */
75 u16 remoteport; /* must always be set */
76 struct sockaddr_in sin_local; /* local socket name */
77 struct sockaddr_in sin_remote; /* remote socket name */
78 struct msghdr sendmsg; /* ip message to send */
79 struct iovec sendiov; /* iov for message */
80
81 /* frame */
82 struct l1oip_chan chan[128]; /* channel instances */
83};
84
85extern int l1oip_law_to_4bit(u8 *data, int len, u8 *result, u32 *state);
86extern int l1oip_4bit_to_law(u8 *data, int len, u8 *result);
87extern int l1oip_alaw_to_ulaw(u8 *data, int len, u8 *result);
88extern int l1oip_ulaw_to_alaw(u8 *data, int len, u8 *result);
89extern void l1oip_4bit_free(void);
90extern int l1oip_4bit_alloc(int ulaw);
91
diff --git a/drivers/isdn/mISDN/l1oip_codec.c b/drivers/isdn/mISDN/l1oip_codec.c
new file mode 100644
index 000000000000..a2dc4570ef43
--- /dev/null
+++ b/drivers/isdn/mISDN/l1oip_codec.c
@@ -0,0 +1,374 @@
1/*
2
3 * l1oip_codec.c generic codec using lookup table
4 * -> conversion from a-Law to u-Law
5 * -> conversion from u-Law to a-Law
6 * -> compression by reducing the number of sample resolution to 4
7 *
8 * NOTE: It is not compatible with any standard codec like ADPCM.
9 *
10 * Author Andreas Eversberg (jolly@eversberg.eu)
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26 */
27
28/*
29
30How the codec works:
31--------------------
32
33The volume is increased to increase the dynamic range of the audio signal.
34Each sample is converted to a-LAW with only 16 steps of level resolution.
35A pair of two samples are stored in one byte.
36
37The first byte is stored in the upper bits, the second byte is stored in the
38lower bits.
39
40To speed up compression and decompression, two lookup tables are formed:
41
42- 16 bits index for two samples (law encoded) with 8 bit compressed result.
43- 8 bits index for one compressed data with 16 bits decompressed result.
44
45NOTE: The bytes are handled as they are law-encoded.
46
47*/
48
49#include <linux/vmalloc.h>
50#include <linux/mISDNif.h>
51#include "core.h"
52
53/* definitions of codec. don't use calculations, code may run slower. */
54
55static u8 *table_com;
56static u16 *table_dec;
57
58
59/* alaw -> ulaw */
60static u8 alaw_to_ulaw[256] =
61{
62 0xab, 0x2b, 0xe3, 0x63, 0x8b, 0x0b, 0xc9, 0x49,
63 0xba, 0x3a, 0xf6, 0x76, 0x9b, 0x1b, 0xd7, 0x57,
64 0xa3, 0x23, 0xdd, 0x5d, 0x83, 0x03, 0xc1, 0x41,
65 0xb2, 0x32, 0xeb, 0x6b, 0x93, 0x13, 0xcf, 0x4f,
66 0xaf, 0x2f, 0xe7, 0x67, 0x8f, 0x0f, 0xcd, 0x4d,
67 0xbe, 0x3e, 0xfe, 0x7e, 0x9f, 0x1f, 0xdb, 0x5b,
68 0xa7, 0x27, 0xdf, 0x5f, 0x87, 0x07, 0xc5, 0x45,
69 0xb6, 0x36, 0xef, 0x6f, 0x97, 0x17, 0xd3, 0x53,
70 0xa9, 0x29, 0xe1, 0x61, 0x89, 0x09, 0xc7, 0x47,
71 0xb8, 0x38, 0xf2, 0x72, 0x99, 0x19, 0xd5, 0x55,
72 0xa1, 0x21, 0xdc, 0x5c, 0x81, 0x01, 0xbf, 0x3f,
73 0xb0, 0x30, 0xe9, 0x69, 0x91, 0x11, 0xce, 0x4e,
74 0xad, 0x2d, 0xe5, 0x65, 0x8d, 0x0d, 0xcb, 0x4b,
75 0xbc, 0x3c, 0xfa, 0x7a, 0x9d, 0x1d, 0xd9, 0x59,
76 0xa5, 0x25, 0xde, 0x5e, 0x85, 0x05, 0xc3, 0x43,
77 0xb4, 0x34, 0xed, 0x6d, 0x95, 0x15, 0xd1, 0x51,
78 0xac, 0x2c, 0xe4, 0x64, 0x8c, 0x0c, 0xca, 0x4a,
79 0xbb, 0x3b, 0xf8, 0x78, 0x9c, 0x1c, 0xd8, 0x58,
80 0xa4, 0x24, 0xde, 0x5e, 0x84, 0x04, 0xc2, 0x42,
81 0xb3, 0x33, 0xec, 0x6c, 0x94, 0x14, 0xd0, 0x50,
82 0xb0, 0x30, 0xe8, 0x68, 0x90, 0x10, 0xce, 0x4e,
83 0xbf, 0x3f, 0xfe, 0x7e, 0xa0, 0x20, 0xdc, 0x5c,
84 0xa8, 0x28, 0xe0, 0x60, 0x88, 0x08, 0xc6, 0x46,
85 0xb7, 0x37, 0xf0, 0x70, 0x98, 0x18, 0xd4, 0x54,
86 0xaa, 0x2a, 0xe2, 0x62, 0x8a, 0x0a, 0xc8, 0x48,
87 0xb9, 0x39, 0xf4, 0x74, 0x9a, 0x1a, 0xd6, 0x56,
88 0xa2, 0x22, 0xdd, 0x5d, 0x82, 0x02, 0xc0, 0x40,
89 0xb1, 0x31, 0xea, 0x6a, 0x92, 0x12, 0xcf, 0x4f,
90 0xae, 0x2e, 0xe6, 0x66, 0x8e, 0x0e, 0xcc, 0x4c,
91 0xbd, 0x3d, 0xfc, 0x7c, 0x9e, 0x1e, 0xda, 0x5a,
92 0xa6, 0x26, 0xdf, 0x5f, 0x86, 0x06, 0xc4, 0x44,
93 0xb5, 0x35, 0xee, 0x6e, 0x96, 0x16, 0xd2, 0x52
94};
95
96/* ulaw -> alaw */
97static u8 ulaw_to_alaw[256] =
98{
99 0xab, 0x55, 0xd5, 0x15, 0x95, 0x75, 0xf5, 0x35,
100 0xb5, 0x45, 0xc5, 0x05, 0x85, 0x65, 0xe5, 0x25,
101 0xa5, 0x5d, 0xdd, 0x1d, 0x9d, 0x7d, 0xfd, 0x3d,
102 0xbd, 0x4d, 0xcd, 0x0d, 0x8d, 0x6d, 0xed, 0x2d,
103 0xad, 0x51, 0xd1, 0x11, 0x91, 0x71, 0xf1, 0x31,
104 0xb1, 0x41, 0xc1, 0x01, 0x81, 0x61, 0xe1, 0x21,
105 0x59, 0xd9, 0x19, 0x99, 0x79, 0xf9, 0x39, 0xb9,
106 0x49, 0xc9, 0x09, 0x89, 0x69, 0xe9, 0x29, 0xa9,
107 0xd7, 0x17, 0x97, 0x77, 0xf7, 0x37, 0xb7, 0x47,
108 0xc7, 0x07, 0x87, 0x67, 0xe7, 0x27, 0xa7, 0xdf,
109 0x9f, 0x7f, 0xff, 0x3f, 0xbf, 0x4f, 0xcf, 0x0f,
110 0x8f, 0x6f, 0xef, 0x2f, 0x53, 0x13, 0x73, 0x33,
111 0xb3, 0x43, 0xc3, 0x03, 0x83, 0x63, 0xe3, 0x23,
112 0xa3, 0x5b, 0xdb, 0x1b, 0x9b, 0x7b, 0xfb, 0x3b,
113 0xbb, 0xbb, 0x4b, 0x4b, 0xcb, 0xcb, 0x0b, 0x0b,
114 0x8b, 0x8b, 0x6b, 0x6b, 0xeb, 0xeb, 0x2b, 0x2b,
115 0xab, 0x54, 0xd4, 0x14, 0x94, 0x74, 0xf4, 0x34,
116 0xb4, 0x44, 0xc4, 0x04, 0x84, 0x64, 0xe4, 0x24,
117 0xa4, 0x5c, 0xdc, 0x1c, 0x9c, 0x7c, 0xfc, 0x3c,
118 0xbc, 0x4c, 0xcc, 0x0c, 0x8c, 0x6c, 0xec, 0x2c,
119 0xac, 0x50, 0xd0, 0x10, 0x90, 0x70, 0xf0, 0x30,
120 0xb0, 0x40, 0xc0, 0x00, 0x80, 0x60, 0xe0, 0x20,
121 0x58, 0xd8, 0x18, 0x98, 0x78, 0xf8, 0x38, 0xb8,
122 0x48, 0xc8, 0x08, 0x88, 0x68, 0xe8, 0x28, 0xa8,
123 0xd6, 0x16, 0x96, 0x76, 0xf6, 0x36, 0xb6, 0x46,
124 0xc6, 0x06, 0x86, 0x66, 0xe6, 0x26, 0xa6, 0xde,
125 0x9e, 0x7e, 0xfe, 0x3e, 0xbe, 0x4e, 0xce, 0x0e,
126 0x8e, 0x6e, 0xee, 0x2e, 0x52, 0x12, 0x72, 0x32,
127 0xb2, 0x42, 0xc2, 0x02, 0x82, 0x62, 0xe2, 0x22,
128 0xa2, 0x5a, 0xda, 0x1a, 0x9a, 0x7a, 0xfa, 0x3a,
129 0xba, 0xba, 0x4a, 0x4a, 0xca, 0xca, 0x0a, 0x0a,
130 0x8a, 0x8a, 0x6a, 0x6a, 0xea, 0xea, 0x2a, 0x2a
131};
132
133/* alaw -> 4bit compression */
134static u8 alaw_to_4bit[256] = {
135 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
136 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
137 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
138 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
139 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
140 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
141 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
142 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
143 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
144 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
145 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0d, 0x02,
146 0x0e, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
147 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
148 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
149 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
150 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
151 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
152 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
153 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
154 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
155 0x0e, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
156 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x01, 0x0a, 0x05,
157 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
158 0x0d, 0x02, 0x09, 0x07, 0x0f, 0x00, 0x0b, 0x04,
159 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
160 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
161 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
162 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
163 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
164 0x0d, 0x02, 0x08, 0x07, 0x0f, 0x00, 0x0b, 0x04,
165 0x0e, 0x01, 0x0a, 0x05, 0x0f, 0x00, 0x0c, 0x03,
166 0x0d, 0x02, 0x09, 0x06, 0x0f, 0x00, 0x0b, 0x04,
167};
168
169/* 4bit -> alaw decompression */
170static u8 _4bit_to_alaw[16] = {
171 0x5d, 0x51, 0xd9, 0xd7, 0x5f, 0x53, 0xa3, 0x4b,
172 0x2a, 0x3a, 0x22, 0x2e, 0x26, 0x56, 0x20, 0x2c,
173};
174
175/* ulaw -> 4bit compression */
176static u8 ulaw_to_4bit[256] = {
177 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
178 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
179 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
180 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
181 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
182 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
183 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
184 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
185 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
186 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x04, 0x04,
187 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
188 0x04, 0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x05,
189 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
190 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
191 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
192 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x08,
193 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
194 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
195 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
196 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
197 0x0f, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e,
198 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e,
199 0x0e, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d,
200 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d,
201 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
202 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b,
203 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
204 0x0b, 0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, 0x0a,
205 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
206 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09,
207 0x09, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
208 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
209};
210
211/* 4bit -> ulaw decompression */
212static u8 _4bit_to_ulaw[16] = {
213 0x11, 0x21, 0x31, 0x40, 0x4e, 0x5c, 0x68, 0x71,
214 0xfe, 0xef, 0xe7, 0xdb, 0xcd, 0xbf, 0xaf, 0x9f,
215};
216
217
218/*
219 * Compresses data to the result buffer
220 * The result size must be at least half of the input buffer.
221 * The number of samples also must be even!
222 */
223int
224l1oip_law_to_4bit(u8 *data, int len, u8 *result, u32 *state)
225{
226 int ii, i = 0, o = 0;
227
228 if (!len)
229 return 0;
230
231 /* send saved byte and first input byte */
232 if (*state) {
233 *result++ = table_com[(((*state)<<8)&0xff00) | (*data++)];
234 len--;
235 o++;
236 }
237
238 ii = len >> 1;
239
240 while (i < ii) {
241 *result++ = table_com[(data[0]<<8) | (data[1])];
242 data += 2;
243 i++;
244 o++;
245 }
246
247 /* if len has an odd number, we save byte for next call */
248 if (len & 1)
249 *state = 0x100 + *data;
250 else
251 *state = 0;
252
253 return o;
254}
255
256/* Decompress data to the result buffer
257 * The result size must be the number of sample in packet. (2 * input data)
258 * The number of samples in the result are even!
259 */
260int
261l1oip_4bit_to_law(u8 *data, int len, u8 *result)
262{
263 int i = 0;
264 u16 r;
265
266 while (i < len) {
267 r = table_dec[*data++];
268 *result++ = r>>8;
269 *result++ = r;
270 i++;
271 }
272
273 return len << 1;
274}
275
276
277/*
278 * law conversion
279 */
280int
281l1oip_alaw_to_ulaw(u8 *data, int len, u8 *result)
282{
283 int i = 0;
284
285 while (i < len) {
286 *result++ = alaw_to_ulaw[*data++];
287 i++;
288 }
289
290 return len;
291}
292
293int
294l1oip_ulaw_to_alaw(u8 *data, int len, u8 *result)
295{
296 int i = 0;
297
298 while (i < len) {
299 *result++ = ulaw_to_alaw[*data++];
300 i++;
301 }
302
303 return len;
304}
305
306
307/*
308 * generate/free compression and decompression table
309 */
310void
311l1oip_4bit_free(void)
312{
313 if (table_dec)
314 vfree(table_dec);
315 if (table_com)
316 vfree(table_com);
317 table_com = NULL;
318 table_dec = NULL;
319}
320
321int
322l1oip_4bit_alloc(int ulaw)
323{
324 int i1, i2, c, sample;
325
326 /* in case, it is called again */
327 if (table_dec)
328 return 0;
329
330 /* alloc conversion tables */
331 table_com = vmalloc(65536);
332 table_dec = vmalloc(512);
333 if (!table_com | !table_dec) {
334 l1oip_4bit_free();
335 return -ENOMEM;
336 }
337 memset(table_com, 0, 65536);
338 memset(table_dec, 0, 512);
339 /* generate compression table */
340 i1 = 0;
341 while (i1 < 256) {
342 if (ulaw)
343 c = ulaw_to_4bit[i1];
344 else
345 c = alaw_to_4bit[i1];
346 i2 = 0;
347 while (i2 < 256) {
348 table_com[(i1<<8) | i2] |= (c<<4);
349 table_com[(i2<<8) | i1] |= c;
350 i2++;
351 }
352 i1++;
353 }
354
355 /* generate decompression table */
356 i1 = 0;
357 while (i1 < 16) {
358 if (ulaw)
359 sample = _4bit_to_ulaw[i1];
360 else
361 sample = _4bit_to_alaw[i1];
362 i2 = 0;
363 while (i2 < 16) {
364 table_dec[(i1<<4) | i2] |= (sample<<8);
365 table_dec[(i2<<4) | i1] |= sample;
366 i2++;
367 }
368 i1++;
369 }
370
371 return 0;
372}
373
374
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
new file mode 100644
index 000000000000..155b99780c4f
--- /dev/null
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -0,0 +1,1518 @@
1/*
2
3 * l1oip.c low level driver for tunneling layer 1 over IP
4 *
5 * NOTE: It is not compatible with TDMoIP nor "ISDN over IP".
6 *
7 * Author Andreas Eversberg (jolly@eversberg.eu)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 */
24
25/* module parameters:
26 * type:
27 Value 1 = BRI
28 Value 2 = PRI
29 Value 3 = BRI (multi channel frame, not supported yet)
30 Value 4 = PRI (multi channel frame, not supported yet)
31 A multi channel frame reduces overhead to a single frame for all
32 b-channels, but increases delay.
33 (NOTE: Multi channel frames are not implemented yet.)
34
35 * codec:
36 Value 0 = transparent (default)
37 Value 1 = transfer ALAW
38 Value 2 = transfer ULAW
39 Value 3 = transfer generic 4 bit compression.
40
41 * ulaw:
42 0 = we use a-Law (default)
43 1 = we use u-Law
44
45 * limit:
46 limitation of B-channels to control bandwidth (1...126)
47 BRI: 1 or 2
48 PRI: 1-30, 31-126 (126, because dchannel ist not counted here)
49 Also limited ressources are used for stack, resulting in less channels.
50 It is possible to have more channels than 30 in PRI mode, this must
51 be supported by the application.
52
53 * ip:
54 byte representation of remote ip address (127.0.0.1 -> 127,0,0,1)
55 If not given or four 0, no remote address is set.
56 For multiple interfaces, concat ip addresses. (127,0,0,1,127,0,0,1)
57
58 * port:
59 port number (local interface)
60 If not given or 0, port 931 is used for fist instance, 932 for next...
61 For multiple interfaces, different ports must be given.
62
63 * remoteport:
64 port number (remote interface)
65 If not given or 0, remote port equals local port
66 For multiple interfaces on equal sites, different ports must be given.
67
68 * ondemand:
69 0 = fixed (always transmit packets, even when remote side timed out)
70 1 = on demand (only transmit packets, when remote side is detected)
71 the default is 0
72 NOTE: ID must also be set for on demand.
73
74 * id:
75 optional value to identify frames. This value must be equal on both
76 peers and should be random. If omitted or 0, no ID is transmitted.
77
78 * debug:
79 NOTE: only one debug value must be given for all cards
80 enable debugging (see l1oip.h for debug options)
81
82
83Special mISDN controls:
84
85 op = MISDN_CTRL_SETPEER*
86 p1 = bytes 0-3 : remote IP address in network order (left element first)
87 p2 = bytes 1-2 : remote port in network order (high byte first)
88 optional:
89 p2 = bytes 3-4 : local port in network order (high byte first)
90
91 op = MISDN_CTRL_UNSETPEER*
92
93 * Use l1oipctrl for comfortable setting or removing ip address.
94 (Layer 1 Over IP CTRL)
95
96
97L1oIP-Protocol
98--------------
99
100Frame Header:
101
102 7 6 5 4 3 2 1 0
103+---------------+
104|Ver|T|I|Coding |
105+---------------+
106| ID byte 3 * |
107+---------------+
108| ID byte 2 * |
109+---------------+
110| ID byte 1 * |
111+---------------+
112| ID byte 0 * |
113+---------------+
114|M| Channel |
115+---------------+
116| Length * |
117+---------------+
118| Time Base MSB |
119+---------------+
120| Time Base LSB |
121+---------------+
122| Data.... |
123
124...
125
126| |
127+---------------+
128|M| Channel |
129+---------------+
130| Length * |
131+---------------+
132| Time Base MSB |
133+---------------+
134| Time Base LSB |
135+---------------+
136| Data.... |
137
138...
139
140
141* Only included in some cases.
142
143- Ver = Version
144If version is missmatch, the frame must be ignored.
145
146- T = Type of interface
147Must be 0 for S0 or 1 for E1.
148
149- I = Id present
150If bit is set, four ID bytes are included in frame.
151
152- ID = Connection ID
153Additional ID to prevent Denial of Service attacs. Also it prevents hijacking
154connections with dynamic IP. The ID should be random and must not be 0.
155
156- Coding = Type of codec
157Must be 0 for no transcoding. Also for D-channel and other HDLC frames.
158 1 and 2 are reserved for explicitly use of a-LAW or u-LAW codec.
159 3 is used for generic table compressor.
160
161- M = More channels to come. If this flag is 1, the following byte contains
162the length of the channel data. After the data block, the next channel will
163be defined. The flag for the last channel block (or if only one channel is
164transmitted), must be 0 and no length is given.
165
166- Channel = Channel number
1670 reserved
1681-3 channel data for S0 (3 is D-channel)
1691-31 channel data for E1 (16 is D-channel)
17032-127 channel data for extended E1 (16 is D-channel)
171
172- The length is used if the M-flag is 1. It is used to find the next channel
173inside frame.
174NOTE: A value of 0 equals 256 bytes of data.
175 -> For larger data blocks, a single frame must be used.
176 -> For larger streams, a single frame or multiple blocks with same channel ID
177 must be used.
178
179- Time Base = Timestamp of first sample in frame
180The "Time Base" is used to rearange packets and to detect packet loss.
181The 16 bits are sent in network order (MSB first) and count 1/8000 th of a
182second. This causes a wrap arround each 8,192 seconds. There is no requirement
183for the initial "Time Base", but 0 should be used for the first packet.
184In case of HDLC data, this timestamp counts the packet or byte number.
185
186
187Two Timers:
188
189After initialisation, a timer of 15 seconds is started. Whenever a packet is
190transmitted, the timer is reset to 15 seconds again. If the timer expires, an
191empty packet is transmitted. This keep the connection alive.
192
193When a valid packet is received, a timer 65 seconds is started. The interface
194become ACTIVE. If the timer expires, the interface becomes INACTIVE.
195
196
197Dynamic IP handling:
198
199To allow dynamic IP, the ID must be non 0. In this case, any packet with the
200correct port number and ID will be accepted. If the remote side changes its IP
201the new IP is used for all transmitted packets until it changes again.
202
203
204On Demand:
205
206If the ondemand parameter is given, the remote IP is set to 0 on timeout.
207This will stop keepalive traffic to remote. If the remote is online again,
208traffic will continue to the remote address. This is usefull for road warriors.
209This feature only works with ID set, otherwhise it is highly unsecure.
210
211
212Socket and Thread
213-----------------
214
215The complete socket opening and closing is done by a thread.
216When the thread opened a socket, the hc->socket descriptor is set. Whenever a
217packet shall be sent to the socket, the hc->socket must be checked wheter not
218NULL. To prevent change in socket descriptor, the hc->socket_lock must be used.
219To change the socket, a recall of l1oip_socket_open() will safely kill the
220socket process and create a new one.
221
222*/
223
224#define L1OIP_VERSION 0 /* 0...3 */
225
226#include <linux/module.h>
227#include <linux/delay.h>
228#include <linux/mISDNif.h>
229#include <linux/mISDNhw.h>
230#include <linux/mISDNdsp.h>
231#include <linux/init.h>
232#include <linux/in.h>
233#include <linux/inet.h>
234#include <linux/workqueue.h>
235#include <linux/kthread.h>
236#include <net/sock.h>
237#include "core.h"
238#include "l1oip.h"
239
240static const char *l1oip_revision = "2.00";
241
242static int l1oip_cnt;
243static spinlock_t l1oip_lock;
244static struct list_head l1oip_ilist;
245
246#define MAX_CARDS 16
247static u_int type[MAX_CARDS];
248static u_int codec[MAX_CARDS];
249static u_int ip[MAX_CARDS*4];
250static u_int port[MAX_CARDS];
251static u_int remoteport[MAX_CARDS];
252static u_int ondemand[MAX_CARDS];
253static u_int limit[MAX_CARDS];
254static u_int id[MAX_CARDS];
255static int debug;
256static int ulaw;
257
258MODULE_AUTHOR("Andreas Eversberg");
259MODULE_LICENSE("GPL");
260module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR);
261module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR);
262module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR);
263module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR);
264module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR);
265module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR);
266module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR);
267module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR);
268module_param(ulaw, uint, S_IRUGO | S_IWUSR);
269module_param(debug, uint, S_IRUGO | S_IWUSR);
270
271/*
272 * send a frame via socket, if open and restart timer
273 */
274static int
275l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask,
276 u16 timebase, u8 *buf, int len)
277{
278 u8 *p;
279 int multi = 0;
280 u8 frame[len+32];
281 struct socket *socket = NULL;
282 mm_segment_t oldfs;
283
284 if (debug & DEBUG_L1OIP_MSG)
285 printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n",
286 __func__, len);
287
288 p = frame;
289
290 /* restart timer */
291 if ((int)(hc->keep_tl.expires-jiffies) < 5*HZ) {
292 del_timer(&hc->keep_tl);
293 hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE*HZ;
294 add_timer(&hc->keep_tl);
295 } else
296 hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE*HZ;
297
298 if (debug & DEBUG_L1OIP_MSG)
299 printk(KERN_DEBUG "%s: resetting timer\n", __func__);
300
301 /* drop if we have no remote ip or port */
302 if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) {
303 if (debug & DEBUG_L1OIP_MSG)
304 printk(KERN_DEBUG "%s: dropping frame, because remote "
305 "IP is not set.\n", __func__);
306 return len;
307 }
308
309 /* assemble frame */
310 *p++ = (L1OIP_VERSION<<6) /* version and coding */
311 | (hc->pri?0x20:0x00) /* type */
312 | (hc->id?0x10:0x00) /* id */
313 | localcodec;
314 if (hc->id) {
315 *p++ = hc->id>>24; /* id */
316 *p++ = hc->id>>16;
317 *p++ = hc->id>>8;
318 *p++ = hc->id;
319 }
320 *p++ = (multi == 1)?0x80:0x00 + channel; /* m-flag, channel */
321 if (multi == 1)
322 *p++ = len; /* length */
323 *p++ = timebase>>8; /* time base */
324 *p++ = timebase;
325
326 if (buf && len) { /* add data to frame */
327 if (localcodec == 1 && ulaw)
328 l1oip_ulaw_to_alaw(buf, len, p);
329 else if (localcodec == 2 && !ulaw)
330 l1oip_alaw_to_ulaw(buf, len, p);
331 else if (localcodec == 3)
332 len = l1oip_law_to_4bit(buf, len, p,
333 &hc->chan[channel].codecstate);
334 else
335 memcpy(p, buf, len);
336 }
337 len += p - frame;
338
339 /* check for socket in safe condition */
340 spin_lock(&hc->socket_lock);
341 if (!hc->socket) {
342 spin_unlock(&hc->socket_lock);
343 return 0;
344 }
345 /* seize socket */
346 socket = hc->socket;
347 hc->socket = NULL;
348 spin_unlock(&hc->socket_lock);
349 /* send packet */
350 if (debug & DEBUG_L1OIP_MSG)
351 printk(KERN_DEBUG "%s: sending packet to socket (len "
352 "= %d)\n", __func__, len);
353 hc->sendiov.iov_base = frame;
354 hc->sendiov.iov_len = len;
355 oldfs = get_fs();
356 set_fs(KERNEL_DS);
357 len = sock_sendmsg(socket, &hc->sendmsg, len);
358 set_fs(oldfs);
359 /* give socket back */
360 hc->socket = socket; /* no locking required */
361
362 return len;
363}
364
365
366/*
367 * receive channel data from socket
368 */
369static void
370l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase,
371 u8 *buf, int len)
372{
373 struct sk_buff *nskb;
374 struct bchannel *bch;
375 struct dchannel *dch;
376 u8 *p;
377 u32 rx_counter;
378
379 if (len == 0) {
380 if (debug & DEBUG_L1OIP_MSG)
381 printk(KERN_DEBUG "%s: received empty keepalive data, "
382 "ignoring\n", __func__);
383 return;
384 }
385
386 if (debug & DEBUG_L1OIP_MSG)
387 printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n",
388 __func__, len);
389
390 if (channel < 1 || channel > 127) {
391 printk(KERN_WARNING "%s: packet error - channel %d out of "
392 "range\n", __func__, channel);
393 return;
394 }
395 dch = hc->chan[channel].dch;
396 bch = hc->chan[channel].bch;
397 if (!dch && !bch) {
398 printk(KERN_WARNING "%s: packet error - channel %d not in "
399 "stack\n", __func__, channel);
400 return;
401 }
402
403 /* prepare message */
404 nskb = mI_alloc_skb((remotecodec == 3)?(len<<1):len, GFP_ATOMIC);
405 if (!nskb) {
406 printk(KERN_ERR "%s: No mem for skb.\n", __func__);
407 return;
408 }
409 p = skb_put(nskb, (remotecodec == 3)?(len<<1):len);
410
411 if (remotecodec == 1 && ulaw)
412 l1oip_alaw_to_ulaw(buf, len, p);
413 else if (remotecodec == 2 && !ulaw)
414 l1oip_ulaw_to_alaw(buf, len, p);
415 else if (remotecodec == 3)
416 len = l1oip_4bit_to_law(buf, len, p);
417 else
418 memcpy(p, buf, len);
419
420 /* send message up */
421 if (dch && len >= 2) {
422 dch->rx_skb = nskb;
423 recv_Dchannel(dch);
424 }
425 if (bch) {
426 /* expand 16 bit sequence number to 32 bit sequence number */
427 rx_counter = hc->chan[channel].rx_counter;
428 if (((s16)(timebase - rx_counter)) >= 0) {
429 /* time has changed forward */
430 if (timebase >= (rx_counter & 0xffff))
431 rx_counter =
432 (rx_counter & 0xffff0000) | timebase;
433 else
434 rx_counter = ((rx_counter & 0xffff0000)+0x10000)
435 | timebase;
436 } else {
437 /* time has changed backwards */
438 if (timebase < (rx_counter & 0xffff))
439 rx_counter =
440 (rx_counter & 0xffff0000) | timebase;
441 else
442 rx_counter = ((rx_counter & 0xffff0000)-0x10000)
443 | timebase;
444 }
445 hc->chan[channel].rx_counter = rx_counter;
446
447#ifdef REORDER_DEBUG
448 if (hc->chan[channel].disorder_flag) {
449 struct sk_buff *skb;
450 int cnt;
451 skb = hc->chan[channel].disorder_skb;
452 hc->chan[channel].disorder_skb = nskb;
453 nskb = skb;
454 cnt = hc->chan[channel].disorder_cnt;
455 hc->chan[channel].disorder_cnt = rx_counter;
456 rx_counter = cnt;
457 }
458 hc->chan[channel].disorder_flag ^= 1;
459 if (nskb)
460#endif
461 queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb);
462 }
463}
464
465
466/*
467 * parse frame and extract channel data
468 */
469static void
470l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len)
471{
472 u32 id;
473 u8 channel;
474 u8 remotecodec;
475 u16 timebase;
476 int m, mlen;
477 int len_start = len; /* initial frame length */
478 struct dchannel *dch = hc->chan[hc->d_idx].dch;
479
480 if (debug & DEBUG_L1OIP_MSG)
481 printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n",
482 __func__, len);
483
484 /* check lenght */
485 if (len < 1+1+2) {
486 printk(KERN_WARNING "%s: packet error - length %d below "
487 "4 bytes\n", __func__, len);
488 return;
489 }
490
491 /* check version */
492 if (((*buf)>>6) != L1OIP_VERSION) {
493 printk(KERN_WARNING "%s: packet error - unknown version %d\n",
494 __func__, buf[0]>>6);
495 return;
496 }
497
498 /* check type */
499 if (((*buf)&0x20) && !hc->pri) {
500 printk(KERN_WARNING "%s: packet error - received E1 packet "
501 "on S0 interface\n", __func__);
502 return;
503 }
504 if (!((*buf)&0x20) && hc->pri) {
505 printk(KERN_WARNING "%s: packet error - received S0 packet "
506 "on E1 interface\n", __func__);
507 return;
508 }
509
510 /* get id flag */
511 id = (*buf>>4)&1;
512
513 /* check coding */
514 remotecodec = (*buf) & 0x0f;
515 if (remotecodec > 3) {
516 printk(KERN_WARNING "%s: packet error - remotecodec %d "
517 "unsupported\n", __func__, remotecodec);
518 return;
519 }
520 buf++;
521 len--;
522
523 /* check id */
524 if (id) {
525 if (!hc->id) {
526 printk(KERN_WARNING "%s: packet error - packet has id "
527 "0x%x, but we have not\n", __func__, id);
528 return;
529 }
530 if (len < 4) {
531 printk(KERN_WARNING "%s: packet error - packet too "
532 "short for ID value\n", __func__);
533 return;
534 }
535 id = (*buf++) << 24;
536 id += (*buf++) << 16;
537 id += (*buf++) << 8;
538 id += (*buf++);
539 len -= 4;
540
541 if (id != hc->id) {
542 printk(KERN_WARNING "%s: packet error - ID mismatch, "
543 "got 0x%x, we 0x%x\n",
544 __func__, id, hc->id);
545 return;
546 }
547 } else {
548 if (hc->id) {
549 printk(KERN_WARNING "%s: packet error - packet has no "
550 "ID, but we have\n", __func__);
551 return;
552 }
553 }
554
555multiframe:
556 if (len < 1) {
557 printk(KERN_WARNING "%s: packet error - packet too short, "
558 "channel expected at position %d.\n",
559 __func__, len-len_start+1);
560 return;
561 }
562
563 /* get channel and multiframe flag */
564 channel = *buf&0x7f;
565 m = *buf >> 7;
566 buf++;
567 len--;
568
569 /* check length on multiframe */
570 if (m) {
571 if (len < 1) {
572 printk(KERN_WARNING "%s: packet error - packet too "
573 "short, length expected at position %d.\n",
574 __func__, len_start-len-1);
575 return;
576 }
577
578 mlen = *buf++;
579 len--;
580 if (mlen == 0)
581 mlen = 256;
582 if (len < mlen+3) {
583 printk(KERN_WARNING "%s: packet error - length %d at "
584 "position %d exceeds total length %d.\n",
585 __func__, mlen, len_start-len-1, len_start);
586 return;
587 }
588 if (len == mlen+3) {
589 printk(KERN_WARNING "%s: packet error - length %d at "
590 "position %d will not allow additional "
591 "packet.\n",
592 __func__, mlen, len_start-len+1);
593 return;
594 }
595 } else
596 mlen = len-2; /* single frame, substract timebase */
597
598 if (len < 2) {
599 printk(KERN_WARNING "%s: packet error - packet too short, time "
600 "base expected at position %d.\n",
601 __func__, len-len_start+1);
602 return;
603 }
604
605 /* get time base */
606 timebase = (*buf++) << 8;
607 timebase |= (*buf++);
608 len -= 2;
609
610 /* if inactive, we send up a PH_ACTIVATE and activate */
611 if (!test_bit(FLG_ACTIVE, &dch->Flags)) {
612 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
613 printk(KERN_DEBUG "%s: interface become active due to "
614 "received packet\n", __func__);
615 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
616 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
617 NULL, GFP_ATOMIC);
618 }
619
620 /* distribute packet */
621 l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen);
622 buf += mlen;
623 len -= mlen;
624
625 /* multiframe */
626 if (m)
627 goto multiframe;
628
629 /* restart timer */
630 if ((int)(hc->timeout_tl.expires-jiffies) < 5*HZ || !hc->timeout_on) {
631 hc->timeout_on = 1;
632 del_timer(&hc->timeout_tl);
633 hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT*HZ;
634 add_timer(&hc->timeout_tl);
635 } else /* only adjust timer */
636 hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT*HZ;
637
638 /* if ip or source port changes */
639 if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr)
640 || (hc->sin_remote.sin_port != sin->sin_port)) {
641 if (debug & DEBUG_L1OIP_SOCKET)
642 printk(KERN_DEBUG "%s: remote address changes from "
643 "0x%08x to 0x%08x (port %d to %d)\n", __func__,
644 ntohl(hc->sin_remote.sin_addr.s_addr),
645 ntohl(sin->sin_addr.s_addr),
646 ntohs(hc->sin_remote.sin_port),
647 ntohs(sin->sin_port));
648 hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr;
649 hc->sin_remote.sin_port = sin->sin_port;
650 }
651}
652
653
654/*
655 * socket stuff
656 */
657static int
658l1oip_socket_thread(void *data)
659{
660 struct l1oip *hc = (struct l1oip *)data;
661 int ret = 0;
662 struct msghdr msg;
663 struct iovec iov;
664 mm_segment_t oldfs;
665 struct sockaddr_in sin_rx;
666 unsigned char recvbuf[1500];
667 int recvlen;
668 struct socket *socket = NULL;
669 DECLARE_COMPLETION(wait);
670
671 /* make daemon */
672 allow_signal(SIGTERM);
673
674 /* create socket */
675 if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) {
676 printk(KERN_ERR "%s: Failed to create socket.\n", __func__);
677 return -EIO;
678 }
679
680 /* set incoming address */
681 hc->sin_local.sin_family = AF_INET;
682 hc->sin_local.sin_addr.s_addr = INADDR_ANY;
683 hc->sin_local.sin_port = htons((unsigned short)hc->localport);
684
685 /* set outgoing address */
686 hc->sin_remote.sin_family = AF_INET;
687 hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip);
688 hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport);
689
690 /* bind to incomming port */
691 if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local,
692 sizeof(hc->sin_local))) {
693 printk(KERN_ERR "%s: Failed to bind socket to port %d.\n",
694 __func__, hc->localport);
695 ret = -EINVAL;
696 goto fail;
697 }
698
699 /* check sk */
700 if (socket->sk == NULL) {
701 printk(KERN_ERR "%s: socket->sk == NULL\n", __func__);
702 ret = -EIO;
703 goto fail;
704 }
705
706 /* build receive message */
707 msg.msg_name = &sin_rx;
708 msg.msg_namelen = sizeof(sin_rx);
709 msg.msg_control = NULL;
710 msg.msg_controllen = 0;
711 msg.msg_iov = &iov;
712 msg.msg_iovlen = 1;
713
714 /* build send message */
715 hc->sendmsg.msg_name = &hc->sin_remote;
716 hc->sendmsg.msg_namelen = sizeof(hc->sin_remote);
717 hc->sendmsg.msg_control = NULL;
718 hc->sendmsg.msg_controllen = 0;
719 hc->sendmsg.msg_iov = &hc->sendiov;
720 hc->sendmsg.msg_iovlen = 1;
721
722 /* give away socket */
723 spin_lock(&hc->socket_lock);
724 hc->socket = socket;
725 spin_unlock(&hc->socket_lock);
726
727 /* read loop */
728 if (debug & DEBUG_L1OIP_SOCKET)
729 printk(KERN_DEBUG "%s: socket created and open\n",
730 __func__);
731 while (!signal_pending(current)) {
732 iov.iov_base = recvbuf;
733 iov.iov_len = sizeof(recvbuf);
734 oldfs = get_fs();
735 set_fs(KERNEL_DS);
736 recvlen = sock_recvmsg(socket, &msg, sizeof(recvbuf), 0);
737 set_fs(oldfs);
738 if (recvlen > 0) {
739 l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
740 } else {
741 if (debug & DEBUG_L1OIP_SOCKET)
742 printk(KERN_WARNING "%s: broken pipe on socket\n",
743 __func__);
744 }
745 }
746
747 /* get socket back, check first if in use, maybe by send function */
748 spin_lock(&hc->socket_lock);
749 /* if hc->socket is NULL, it is in use until it is given back */
750 while (!hc->socket) {
751 spin_unlock(&hc->socket_lock);
752 schedule_timeout(HZ/10);
753 spin_lock(&hc->socket_lock);
754 }
755 hc->socket = NULL;
756 spin_unlock(&hc->socket_lock);
757
758 if (debug & DEBUG_L1OIP_SOCKET)
759 printk(KERN_DEBUG "%s: socket thread terminating\n",
760 __func__);
761
762fail:
763 /* close socket */
764 if (socket)
765 sock_release(socket);
766
767 /* if we got killed, signal completion */
768 complete(&hc->socket_complete);
769 hc->socket_thread = NULL; /* show termination of thread */
770
771 if (debug & DEBUG_L1OIP_SOCKET)
772 printk(KERN_DEBUG "%s: socket thread terminated\n",
773 __func__);
774 return ret;
775}
776
777static void
778l1oip_socket_close(struct l1oip *hc)
779{
780 /* kill thread */
781 if (hc->socket_thread) {
782 if (debug & DEBUG_L1OIP_SOCKET)
783 printk(KERN_DEBUG "%s: socket thread exists, "
784 "killing...\n", __func__);
785 send_sig(SIGTERM, hc->socket_thread, 0);
786 wait_for_completion(&hc->socket_complete);
787 }
788}
789
790static int
791l1oip_socket_open(struct l1oip *hc)
792{
793 /* in case of reopen, we need to close first */
794 l1oip_socket_close(hc);
795
796 init_completion(&hc->socket_complete);
797
798 /* create receive process */
799 hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s",
800 hc->name);
801 if (IS_ERR(hc->socket_thread)) {
802 int err = PTR_ERR(hc->socket_thread);
803 printk(KERN_ERR "%s: Failed (%d) to create socket process.\n",
804 __func__, err);
805 hc->socket_thread = NULL;
806 sock_release(hc->socket);
807 return err;
808 }
809 if (debug & DEBUG_L1OIP_SOCKET)
810 printk(KERN_DEBUG "%s: socket thread created\n", __func__);
811
812 return 0;
813}
814
815
816static void
817l1oip_send_bh(struct work_struct *work)
818{
819 struct l1oip *hc = container_of(work, struct l1oip, workq);
820
821 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
822 printk(KERN_DEBUG "%s: keepalive timer expired, sending empty "
823 "frame on dchannel\n", __func__);
824
825 /* send an empty l1oip frame at D-channel */
826 l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0);
827}
828
829
830/*
831 * timer stuff
832 */
833static void
834l1oip_keepalive(void *data)
835{
836 struct l1oip *hc = (struct l1oip *)data;
837
838 schedule_work(&hc->workq);
839}
840
841static void
842l1oip_timeout(void *data)
843{
844 struct l1oip *hc = (struct l1oip *)data;
845 struct dchannel *dch = hc->chan[hc->d_idx].dch;
846
847 if (debug & DEBUG_L1OIP_MSG)
848 printk(KERN_DEBUG "%s: timeout timer expired, turn layer one "
849 "down.\n", __func__);
850
851 hc->timeout_on = 0; /* state that timer must be initialized next time */
852
853 /* if timeout, we send up a PH_DEACTIVATE and deactivate */
854 if (test_bit(FLG_ACTIVE, &dch->Flags)) {
855 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
856 printk(KERN_DEBUG "%s: interface become deactivated "
857 "due to timeout\n", __func__);
858 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
859 _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
860 NULL, GFP_ATOMIC);
861 }
862
863 /* if we have ondemand set, we remove ip address */
864 if (hc->ondemand) {
865 if (debug & DEBUG_L1OIP_MSG)
866 printk(KERN_DEBUG "%s: on demand causes ip address to "
867 "be removed\n", __func__);
868 hc->sin_remote.sin_addr.s_addr = 0;
869 }
870}
871
872
873/*
874 * message handling
875 */
876static int
877handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb)
878{
879 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
880 struct dchannel *dch = container_of(dev, struct dchannel, dev);
881 struct l1oip *hc = dch->hw;
882 struct mISDNhead *hh = mISDN_HEAD_P(skb);
883 int ret = -EINVAL;
884 int l, ll;
885 unsigned char *p;
886
887 switch (hh->prim) {
888 case PH_DATA_REQ:
889 if (skb->len < 1) {
890 printk(KERN_WARNING "%s: skb too small\n",
891 __func__);
892 break;
893 }
894 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) {
895 printk(KERN_WARNING "%s: skb too large\n",
896 __func__);
897 break;
898 }
899 /* send frame */
900 p = skb->data;
901 l = skb->len;
902 while (l) {
903 ll = (l < L1OIP_MAX_PERFRAME)?l:L1OIP_MAX_PERFRAME;
904 l1oip_socket_send(hc, 0, dch->slot, 0,
905 hc->chan[dch->slot].tx_counter++, p, ll);
906 p += ll;
907 l -= ll;
908 }
909 skb_trim(skb, 0);
910 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
911 return 0;
912 case PH_ACTIVATE_REQ:
913 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
914 printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n"
915 , __func__, dch->slot, hc->b_num+1);
916 skb_trim(skb, 0);
917 if (test_bit(FLG_ACTIVE, &dch->Flags))
918 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
919 else
920 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
921 return 0;
922 case PH_DEACTIVATE_REQ:
923 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
924 printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d "
925 "(1..%d)\n", __func__, dch->slot,
926 hc->b_num+1);
927 skb_trim(skb, 0);
928 if (test_bit(FLG_ACTIVE, &dch->Flags))
929 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
930 else
931 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
932 return 0;
933 }
934 if (!ret)
935 dev_kfree_skb(skb);
936 return ret;
937}
938
939static int
940channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq)
941{
942 int ret = 0;
943 struct l1oip *hc = dch->hw;
944
945 switch (cq->op) {
946 case MISDN_CTRL_GETOP:
947 cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER;
948 break;
949 case MISDN_CTRL_SETPEER:
950 hc->remoteip = (u32)cq->p1;
951 hc->remoteport = cq->p2 & 0xffff;
952 hc->localport = cq->p2 >> 16;
953 if (!hc->remoteport)
954 hc->remoteport = hc->localport;
955 if (debug & DEBUG_L1OIP_SOCKET)
956 printk(KERN_DEBUG "%s: got new ip address from user "
957 "space.\n", __func__);
958 l1oip_socket_open(hc);
959 break;
960 case MISDN_CTRL_UNSETPEER:
961 if (debug & DEBUG_L1OIP_SOCKET)
962 printk(KERN_DEBUG "%s: removing ip address.\n",
963 __func__);
964 hc->remoteip = 0;
965 l1oip_socket_open(hc);
966 break;
967 default:
968 printk(KERN_WARNING "%s: unknown Op %x\n",
969 __func__, cq->op);
970 ret = -EINVAL;
971 break;
972 }
973 return ret;
974}
975
976static int
977open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq)
978{
979 if (debug & DEBUG_HW_OPEN)
980 printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__,
981 dch->dev.id, __builtin_return_address(0));
982 if (rq->protocol == ISDN_P_NONE)
983 return -EINVAL;
984 if ((dch->dev.D.protocol != ISDN_P_NONE) &&
985 (dch->dev.D.protocol != rq->protocol)) {
986 if (debug & DEBUG_HW_OPEN)
987 printk(KERN_WARNING "%s: change protocol %x to %x\n",
988 __func__, dch->dev.D.protocol, rq->protocol);
989 }
990 if (dch->dev.D.protocol != rq->protocol)
991 dch->dev.D.protocol = rq->protocol;
992
993 if (test_bit(FLG_ACTIVE, &dch->Flags)) {
994 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY,
995 0, NULL, GFP_KERNEL);
996 }
997 rq->ch = &dch->dev.D;
998 if (!try_module_get(THIS_MODULE))
999 printk(KERN_WARNING "%s:cannot get module\n", __func__);
1000 return 0;
1001}
1002
1003static int
1004open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq)
1005{
1006 struct bchannel *bch;
1007 int ch;
1008
1009 if (!test_bit(rq->adr.channel & 0x1f,
1010 &dch->dev.channelmap[rq->adr.channel >> 5]))
1011 return -EINVAL;
1012 if (rq->protocol == ISDN_P_NONE)
1013 return -EINVAL;
1014 ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */
1015 bch = hc->chan[ch].bch;
1016 if (!bch) {
1017 printk(KERN_ERR "%s:internal error ch %d has no bch\n",
1018 __func__, ch);
1019 return -EINVAL;
1020 }
1021 if (test_and_set_bit(FLG_OPEN, &bch->Flags))
1022 return -EBUSY; /* b-channel can be only open once */
1023 bch->ch.protocol = rq->protocol;
1024 rq->ch = &bch->ch;
1025 if (!try_module_get(THIS_MODULE))
1026 printk(KERN_WARNING "%s:cannot get module\n", __func__);
1027 return 0;
1028}
1029
1030static int
1031l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1032{
1033 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
1034 struct dchannel *dch = container_of(dev, struct dchannel, dev);
1035 struct l1oip *hc = dch->hw;
1036 struct channel_req *rq;
1037 int err = 0;
1038
1039 if (dch->debug & DEBUG_HW)
1040 printk(KERN_DEBUG "%s: cmd:%x %p\n",
1041 __func__, cmd, arg);
1042 switch (cmd) {
1043 case OPEN_CHANNEL:
1044 rq = arg;
1045 switch (rq->protocol) {
1046 case ISDN_P_TE_S0:
1047 case ISDN_P_NT_S0:
1048 if (hc->pri) {
1049 err = -EINVAL;
1050 break;
1051 }
1052 err = open_dchannel(hc, dch, rq);
1053 break;
1054 case ISDN_P_TE_E1:
1055 case ISDN_P_NT_E1:
1056 if (!hc->pri) {
1057 err = -EINVAL;
1058 break;
1059 }
1060 err = open_dchannel(hc, dch, rq);
1061 break;
1062 default:
1063 err = open_bchannel(hc, dch, rq);
1064 }
1065 break;
1066 case CLOSE_CHANNEL:
1067 if (debug & DEBUG_HW_OPEN)
1068 printk(KERN_DEBUG "%s: dev(%d) close from %p\n",
1069 __func__, dch->dev.id,
1070 __builtin_return_address(0));
1071 module_put(THIS_MODULE);
1072 break;
1073 case CONTROL_CHANNEL:
1074 err = channel_dctrl(dch, arg);
1075 break;
1076 default:
1077 if (dch->debug & DEBUG_HW)
1078 printk(KERN_DEBUG "%s: unknown command %x\n",
1079 __func__, cmd);
1080 err = -EINVAL;
1081 }
1082 return err;
1083}
1084
1085static int
1086handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb)
1087{
1088 struct bchannel *bch = container_of(ch, struct bchannel, ch);
1089 struct l1oip *hc = bch->hw;
1090 int ret = -EINVAL;
1091 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1092 int l, ll, i;
1093 unsigned char *p;
1094
1095 switch (hh->prim) {
1096 case PH_DATA_REQ:
1097 if (skb->len <= 0) {
1098 printk(KERN_WARNING "%s: skb too small\n",
1099 __func__);
1100 break;
1101 }
1102 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) {
1103 printk(KERN_WARNING "%s: skb too large\n",
1104 __func__);
1105 break;
1106 }
1107 /* check for AIS / ulaw-silence */
1108 p = skb->data;
1109 l = skb->len;
1110 for (i = 0; i < l; i++) {
1111 if (*p++ != 0xff)
1112 break;
1113 }
1114 if (i == l) {
1115 if (debug & DEBUG_L1OIP_MSG)
1116 printk(KERN_DEBUG "%s: got AIS, not sending, "
1117 "but counting\n", __func__);
1118 hc->chan[bch->slot].tx_counter += l;
1119 skb_trim(skb, 0);
1120 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
1121 return 0;
1122 }
1123 /* check for silence */
1124 p = skb->data;
1125 l = skb->len;
1126 for (i = 0; i < l; i++) {
1127 if (*p++ != 0x2a)
1128 break;
1129 }
1130 if (i == l) {
1131 if (debug & DEBUG_L1OIP_MSG)
1132 printk(KERN_DEBUG "%s: got silence, not sending"
1133 ", but counting\n", __func__);
1134 hc->chan[bch->slot].tx_counter += l;
1135 skb_trim(skb, 0);
1136 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
1137 return 0;
1138 }
1139
1140 /* send frame */
1141 p = skb->data;
1142 l = skb->len;
1143 while (l) {
1144 ll = (l < L1OIP_MAX_PERFRAME)?l:L1OIP_MAX_PERFRAME;
1145 l1oip_socket_send(hc, hc->codec, bch->slot, 0,
1146 hc->chan[bch->slot].tx_counter, p, ll);
1147 hc->chan[bch->slot].tx_counter += ll;
1148 p += ll;
1149 l -= ll;
1150 }
1151 skb_trim(skb, 0);
1152 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb);
1153 return 0;
1154 case PH_ACTIVATE_REQ:
1155 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
1156 printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n"
1157 , __func__, bch->slot, hc->b_num+1);
1158 hc->chan[bch->slot].codecstate = 0;
1159 test_and_set_bit(FLG_ACTIVE, &bch->Flags);
1160 skb_trim(skb, 0);
1161 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb);
1162 return 0;
1163 case PH_DEACTIVATE_REQ:
1164 if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
1165 printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d "
1166 "(1..%d)\n", __func__, bch->slot,
1167 hc->b_num+1);
1168 test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
1169 skb_trim(skb, 0);
1170 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb);
1171 return 0;
1172 }
1173 if (!ret)
1174 dev_kfree_skb(skb);
1175 return ret;
1176}
1177
1178static int
1179channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
1180{
1181 int ret = 0;
1182 struct dsp_features *features =
1183 (struct dsp_features *)(*((u_long *)&cq->p1));
1184
1185 switch (cq->op) {
1186 case MISDN_CTRL_GETOP:
1187 cq->op = MISDN_CTRL_HW_FEATURES_OP;
1188 break;
1189 case MISDN_CTRL_HW_FEATURES: /* fill features structure */
1190 if (debug & DEBUG_L1OIP_MSG)
1191 printk(KERN_DEBUG "%s: HW_FEATURE request\n",
1192 __func__);
1193 /* create confirm */
1194 features->unclocked = 1;
1195 features->unordered = 1;
1196 break;
1197 default:
1198 printk(KERN_WARNING "%s: unknown Op %x\n",
1199 __func__, cq->op);
1200 ret = -EINVAL;
1201 break;
1202 }
1203 return ret;
1204}
1205
1206static int
1207l1oip_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1208{
1209 struct bchannel *bch = container_of(ch, struct bchannel, ch);
1210 int err = -EINVAL;
1211
1212 if (bch->debug & DEBUG_HW)
1213 printk(KERN_DEBUG "%s: cmd:%x %p\n",
1214 __func__, cmd, arg);
1215 switch (cmd) {
1216 case CLOSE_CHANNEL:
1217 test_and_clear_bit(FLG_OPEN, &bch->Flags);
1218 test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
1219 ch->protocol = ISDN_P_NONE;
1220 ch->peer = NULL;
1221 module_put(THIS_MODULE);
1222 err = 0;
1223 break;
1224 case CONTROL_CHANNEL:
1225 err = channel_bctrl(bch, arg);
1226 break;
1227 default:
1228 printk(KERN_WARNING "%s: unknown prim(%x)\n",
1229 __func__, cmd);
1230 }
1231 return err;
1232}
1233
1234
1235/*
1236 * cleanup module and stack
1237 */
1238static void
1239release_card(struct l1oip *hc)
1240{
1241 int ch;
1242
1243 if (timer_pending(&hc->keep_tl))
1244 del_timer(&hc->keep_tl);
1245
1246 if (timer_pending(&hc->timeout_tl))
1247 del_timer(&hc->timeout_tl);
1248
1249 if (hc->socket_thread)
1250 l1oip_socket_close(hc);
1251
1252 if (hc->registered && hc->chan[hc->d_idx].dch)
1253 mISDN_unregister_device(&hc->chan[hc->d_idx].dch->dev);
1254 for (ch = 0; ch < 128; ch++) {
1255 if (hc->chan[ch].dch) {
1256 mISDN_freedchannel(hc->chan[ch].dch);
1257 kfree(hc->chan[ch].dch);
1258 }
1259 if (hc->chan[ch].bch) {
1260 mISDN_freebchannel(hc->chan[ch].bch);
1261 kfree(hc->chan[ch].bch);
1262#ifdef REORDER_DEBUG
1263 if (hc->chan[ch].disorder_skb)
1264 dev_kfree_skb(hc->chan[ch].disorder_skb);
1265#endif
1266 }
1267 }
1268
1269 spin_lock(&l1oip_lock);
1270 list_del(&hc->list);
1271 spin_unlock(&l1oip_lock);
1272
1273 kfree(hc);
1274}
1275
1276static void
1277l1oip_cleanup(void)
1278{
1279 struct l1oip *hc, *next;
1280
1281 list_for_each_entry_safe(hc, next, &l1oip_ilist, list)
1282 release_card(hc);
1283
1284 l1oip_4bit_free();
1285}
1286
1287
1288/*
1289 * module and stack init
1290 */
1291static int
1292init_card(struct l1oip *hc, int pri, int bundle)
1293{
1294 struct dchannel *dch;
1295 struct bchannel *bch;
1296 int ret;
1297 int i, ch;
1298
1299 spin_lock_init(&hc->socket_lock);
1300 hc->idx = l1oip_cnt;
1301 hc->pri = pri;
1302 hc->d_idx = pri?16:3;
1303 hc->b_num = pri?30:2;
1304 hc->bundle = bundle;
1305 if (hc->pri)
1306 sprintf(hc->name, "l1oip-e1.%d", l1oip_cnt + 1);
1307 else
1308 sprintf(hc->name, "l1oip-s0.%d", l1oip_cnt + 1);
1309
1310 switch (codec[l1oip_cnt]) {
1311 case 0: /* as is */
1312 case 1: /* alaw */
1313 case 2: /* ulaw */
1314 case 3: /* 4bit */
1315 break;
1316 default:
1317 printk(KERN_ERR "Codec(%d) not supported.\n",
1318 codec[l1oip_cnt]);
1319 return -EINVAL;
1320 }
1321 hc->codec = codec[l1oip_cnt];
1322 if (debug & DEBUG_L1OIP_INIT)
1323 printk(KERN_DEBUG "%s: using codec %d\n",
1324 __func__, hc->codec);
1325
1326 if (id[l1oip_cnt] == 0) {
1327 printk(KERN_WARNING "Warning: No 'id' value given or "
1328 "0, this is highly unsecure. Please use 32 "
1329 "bit randmom number 0x...\n");
1330 }
1331 hc->id = id[l1oip_cnt];
1332 if (debug & DEBUG_L1OIP_INIT)
1333 printk(KERN_DEBUG "%s: using id 0x%x\n", __func__, hc->id);
1334
1335 hc->ondemand = ondemand[l1oip_cnt];
1336 if (hc->ondemand && !hc->id) {
1337 printk(KERN_ERR "%s: ondemand option only allowed in "
1338 "conjunction with non 0 ID\n", __func__);
1339 return -EINVAL;
1340 }
1341
1342 if (limit[l1oip_cnt])
1343 hc->b_num = limit[l1oip_cnt];
1344 if (!pri && hc->b_num > 2) {
1345 printk(KERN_ERR "Maximum limit for BRI interface is 2 "
1346 "channels.\n");
1347 return -EINVAL;
1348 }
1349 if (pri && hc->b_num > 126) {
1350 printk(KERN_ERR "Maximum limit for PRI interface is 126 "
1351 "channels.\n");
1352 return -EINVAL;
1353 }
1354 if (pri && hc->b_num > 30) {
1355 printk(KERN_WARNING "Maximum limit for BRI interface is 30 "
1356 "channels.\n");
1357 printk(KERN_WARNING "Your selection of %d channels must be "
1358 "supported by application.\n", hc->limit);
1359 }
1360
1361 hc->remoteip = ip[l1oip_cnt<<2] << 24
1362 | ip[(l1oip_cnt<<2)+1] << 16
1363 | ip[(l1oip_cnt<<2)+2] << 8
1364 | ip[(l1oip_cnt<<2)+3];
1365 hc->localport = port[l1oip_cnt]?:(L1OIP_DEFAULTPORT+l1oip_cnt);
1366 if (remoteport[l1oip_cnt])
1367 hc->remoteport = remoteport[l1oip_cnt];
1368 else
1369 hc->remoteport = hc->localport;
1370 if (debug & DEBUG_L1OIP_INIT)
1371 printk(KERN_DEBUG "%s: using local port %d remote ip "
1372 "%d.%d.%d.%d port %d ondemand %d\n", __func__,
1373 hc->localport, hc->remoteip >> 24,
1374 (hc->remoteip >> 16) & 0xff,
1375 (hc->remoteip >> 8) & 0xff, hc->remoteip & 0xff,
1376 hc->remoteport, hc->ondemand);
1377
1378 dch = kzalloc(sizeof(struct dchannel), GFP_KERNEL);
1379 if (!dch)
1380 return -ENOMEM;
1381 dch->debug = debug;
1382 mISDN_initdchannel(dch, MAX_DFRAME_LEN_L1, NULL);
1383 dch->hw = hc;
1384 if (pri)
1385 dch->dev.Dprotocols = (1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1);
1386 else
1387 dch->dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0);
1388 dch->dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
1389 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
1390 dch->dev.D.send = handle_dmsg;
1391 dch->dev.D.ctrl = l1oip_dctrl;
1392 dch->dev.nrbchan = hc->b_num;
1393 dch->slot = hc->d_idx;
1394 hc->chan[hc->d_idx].dch = dch;
1395 i = 1;
1396 for (ch = 0; ch < dch->dev.nrbchan; ch++) {
1397 if (ch == 15)
1398 i++;
1399 bch = kzalloc(sizeof(struct bchannel), GFP_KERNEL);
1400 if (!bch) {
1401 printk(KERN_ERR "%s: no memory for bchannel\n",
1402 __func__);
1403 return -ENOMEM;
1404 }
1405 bch->nr = i + ch;
1406 bch->slot = i + ch;
1407 bch->debug = debug;
1408 mISDN_initbchannel(bch, MAX_DATA_MEM);
1409 bch->hw = hc;
1410 bch->ch.send = handle_bmsg;
1411 bch->ch.ctrl = l1oip_bctrl;
1412 bch->ch.nr = i + ch;
1413 list_add(&bch->ch.list, &dch->dev.bchannels);
1414 hc->chan[i + ch].bch = bch;
1415 test_and_set_bit(bch->nr & 0x1f,
1416 &dch->dev.channelmap[bch->nr >> 5]);
1417 }
1418 ret = mISDN_register_device(&dch->dev, hc->name);
1419 if (ret)
1420 return ret;
1421 hc->registered = 1;
1422
1423 if (debug & DEBUG_L1OIP_INIT)
1424 printk(KERN_DEBUG "%s: Setting up network card(%d)\n",
1425 __func__, l1oip_cnt + 1);
1426 ret = l1oip_socket_open(hc);
1427 if (ret)
1428 return ret;
1429
1430 hc->keep_tl.function = (void *)l1oip_keepalive;
1431 hc->keep_tl.data = (ulong)hc;
1432 init_timer(&hc->keep_tl);
1433 hc->keep_tl.expires = jiffies + 2*HZ; /* two seconds first time */
1434 add_timer(&hc->keep_tl);
1435
1436 hc->timeout_tl.function = (void *)l1oip_timeout;
1437 hc->timeout_tl.data = (ulong)hc;
1438 init_timer(&hc->timeout_tl);
1439 hc->timeout_on = 0; /* state that we have timer off */
1440
1441 return 0;
1442}
1443
1444static int __init
1445l1oip_init(void)
1446{
1447 int pri, bundle;
1448 struct l1oip *hc;
1449 int ret;
1450
1451 printk(KERN_INFO "mISDN: Layer-1-over-IP driver Rev. %s\n",
1452 l1oip_revision);
1453
1454 INIT_LIST_HEAD(&l1oip_ilist);
1455 spin_lock_init(&l1oip_lock);
1456
1457 if (l1oip_4bit_alloc(ulaw))
1458 return -ENOMEM;
1459
1460 l1oip_cnt = 0;
1461 while (type[l1oip_cnt] && l1oip_cnt < MAX_CARDS) {
1462 switch (type[l1oip_cnt] & 0xff) {
1463 case 1:
1464 pri = 0;
1465 bundle = 0;
1466 break;
1467 case 2:
1468 pri = 1;
1469 bundle = 0;
1470 break;
1471 case 3:
1472 pri = 0;
1473 bundle = 1;
1474 break;
1475 case 4:
1476 pri = 1;
1477 bundle = 1;
1478 break;
1479 default:
1480 printk(KERN_ERR "Card type(%d) not supported.\n",
1481 type[l1oip_cnt] & 0xff);
1482 l1oip_cleanup();
1483 return -EINVAL;
1484 }
1485
1486 if (debug & DEBUG_L1OIP_INIT)
1487 printk(KERN_DEBUG "%s: interface %d is %s with %s.\n",
1488 __func__, l1oip_cnt, pri?"PRI":"BRI",
1489 bundle?"bundled IP packet for all B-channels"
1490 :"seperate IP packets for every B-channel");
1491
1492 hc = kzalloc(sizeof(struct l1oip), GFP_ATOMIC);
1493 if (!hc) {
1494 printk(KERN_ERR "No kmem for L1-over-IP driver.\n");
1495 l1oip_cleanup();
1496 return -ENOMEM;
1497 }
1498 INIT_WORK(&hc->workq, (void *)l1oip_send_bh);
1499
1500 spin_lock(&l1oip_lock);
1501 list_add_tail(&hc->list, &l1oip_ilist);
1502 spin_unlock(&l1oip_lock);
1503
1504 ret = init_card(hc, pri, bundle);
1505 if (ret) {
1506 l1oip_cleanup();
1507 return ret;
1508 }
1509
1510 l1oip_cnt++;
1511 }
1512 printk(KERN_INFO "%d virtual devices registered\n", l1oip_cnt);
1513 return 0;
1514}
1515
1516module_init(l1oip_init);
1517module_exit(l1oip_cleanup);
1518
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-26 12:14:33 -0500