1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * see notice in l1oip.c
4  */
5 
6 /* debugging */
7 #define DEBUG_L1OIP_INIT	0x00010000
8 #define DEBUG_L1OIP_SOCKET	0x00020000
9 #define DEBUG_L1OIP_MGR		0x00040000
10 #define DEBUG_L1OIP_MSG		0x00080000
11 
12 /* enable to disorder received bchannels by sequence 2143658798... */
13 /*
14   #define REORDER_DEBUG
15 */
16 
17 /* frames */
18 #define L1OIP_MAX_LEN		2048		/* max packet size form l2 */
19 #define L1OIP_MAX_PERFRAME	1400		/* max data size in one frame */
20 
21 
22 /* timers */
23 #define L1OIP_KEEPALIVE		15
24 #define L1OIP_TIMEOUT		65
25 
26 
27 /* socket */
28 #define L1OIP_DEFAULTPORT	931
29 
30 
31 /* channel structure */
32 struct l1oip_chan {
33 	struct dchannel		*dch;
34 	struct bchannel		*bch;
35 	u32			tx_counter;	/* counts xmit bytes/packets */
36 	u32			rx_counter;	/* counts recv bytes/packets */
37 	u32			codecstate;	/* used by codec to save data */
38 #ifdef REORDER_DEBUG
39 	int			disorder_flag;
40 	struct sk_buff		*disorder_skb;
41 	u32			disorder_cnt;
42 #endif
43 };
44 
45 
46 /* card structure */
47 struct l1oip {
48 	struct list_head        list;
49 
50 	/* card */
51 	int			registered;	/* if registered with mISDN */
52 	char			name[MISDN_MAX_IDLEN];
53 	int			idx;		/* card index */
54 	int			pri;		/* 1=pri, 0=bri */
55 	int			d_idx;		/* current dchannel number */
56 	int			b_num;		/* number of bchannels */
57 	u32			id;		/* id of connection */
58 	int			ondemand;	/* if transmis. is on demand */
59 	int			bundle;		/* bundle channels in one frm */
60 	int			codec;		/* codec to use for transmis. */
61 	int			limit;		/* limit number of bchannels */
62 	bool			shutdown;	/* if card is released */
63 
64 	/* timer */
65 	struct timer_list	keep_tl;
66 	struct timer_list	timeout_tl;
67 	int			timeout_on;
68 	struct work_struct	workq;
69 
70 	/* socket */
71 	struct socket		*socket;	/* if set, socket is created */
72 	struct completion	socket_complete;/* completion of sock thread */
73 	struct task_struct	*socket_thread;
74 	spinlock_t		socket_lock;	/* access sock outside thread */
75 	u32			remoteip;	/* if all set, ip is assigned */
76 	u16			localport;	/* must always be set */
77 	u16			remoteport;	/* must always be set */
78 	struct sockaddr_in	sin_local;	/* local socket name */
79 	struct sockaddr_in	sin_remote;	/* remote socket name */
80 	struct msghdr		sendmsg;	/* ip message to send */
81 	struct kvec		sendiov;	/* iov for message */
82 
83 	/* frame */
84 	struct l1oip_chan	chan[128];	/* channel instances */
85 };
86 
87 extern int l1oip_law_to_4bit(u8 *data, int len, u8 *result, u32 *state);
88 extern int l1oip_4bit_to_law(u8 *data, int len, u8 *result);
89 extern int l1oip_alaw_to_ulaw(u8 *data, int len, u8 *result);
90 extern int l1oip_ulaw_to_alaw(u8 *data, int len, u8 *result);
91 extern void l1oip_4bit_free(void);
92 extern int l1oip_4bit_alloc(int ulaw);
93