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>

1 files changed, 91 insertions, 0 deletions

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 @@
+/*
+ * see notice in l1oip.c
+ */
+
+/* debugging */
+#define DEBUG_L1OIP_INIT        0x00010000
+#define DEBUG_L1OIP_SOCKET      0x00020000
+#define DEBUG_L1OIP_MGR         0x00040000
+#define DEBUG_L1OIP_MSG         0x00080000
+
+/* enable to disorder received bchannels by sequence 2143658798... */
+/*
+#define REORDER_DEBUG
+*/
+
+/* frames */
+#define L1OIP_MAX_LEN           2048            /* max packet size form l2 */
+#define L1OIP_MAX_PERFRAME      1400            /* max data size in one frame */
+
+
+/* timers */
+#define L1OIP_KEEPALIVE         15
+#define L1OIP_TIMEOUT           65
+
+
+/* socket */
+#define L1OIP_DEFAULTPORT       931
+
+
+/* channel structure */
+struct l1oip_chan {
+        struct dchannel         *dch;
+        struct bchannel         *bch;
+        u32                     tx_counter;     /* counts xmit bytes/packets */
+        u32                     rx_counter;     /* counts recv bytes/packets */
+        u32                     codecstate;     /* used by codec to save data */
+#ifdef REORDER_DEBUG
+        int                     disorder_flag;
+        struct sk_buff          *disorder_skb;
+        u32                     disorder_cnt;
+#endif
+};
+
+
+/* card structure */
+struct l1oip {
+        struct list_head        list;
+
+        /* card */
+        int                     registered;     /* if registered with mISDN */
+        char                    name[MISDN_MAX_IDLEN];
+        int                     idx;            /* card index */
+        int                     pri;            /* 1=pri, 0=bri */
+        int                     d_idx;          /* current dchannel number */
+        int                     b_num;          /* number of bchannels */
+        u32                     id;             /* id of connection */
+        int                     ondemand;       /* if transmis. is on demand */
+        int                     bundle;         /* bundle channels in one frm */
+        int                     codec;          /* codec to use for transmis. */
+        int                     limit;          /* limit number of bchannels */
+
+        /* timer */
+        struct timer_list       keep_tl;
+        struct timer_list       timeout_tl;
+        int                     timeout_on;
+        struct work_struct      workq;
+
+        /* socket */
+        struct socket           *socket;        /* if set, socket is created */
+        struct completion       socket_complete;/* completion of sock thread */
+        struct task_struct      *socket_thread;
+        spinlock_t              socket_lock;    /* access sock outside thread */
+        u32                     remoteip;       /* if all set, ip is assigned */
+        u16                     localport;      /* must always be set */
+        u16                     remoteport;     /* must always be set */
+        struct sockaddr_in      sin_local;      /* local socket name */
+        struct sockaddr_in      sin_remote;     /* remote socket name */
+        struct msghdr           sendmsg;        /* ip message to send */
+        struct iovec            sendiov;        /* iov for message */
+
+        /* frame */
+        struct l1oip_chan       chan[128];      /* channel instances */
+};
+
+extern int l1oip_law_to_4bit(u8 *data, int len, u8 *result, u32 *state);
+extern int l1oip_4bit_to_law(u8 *data, int len, u8 *result);
+extern int l1oip_alaw_to_ulaw(u8 *data, int len, u8 *result);
+extern int l1oip_ulaw_to_alaw(u8 *data, int len, u8 *result);
+extern void l1oip_4bit_free(void);
+extern int l1oip_4bit_alloc(int ulaw);
+