Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 210 insertions, 0 deletions

diff --git a/include/net/irda/irttp.h b/include/net/irda/irttp.h
new file mode 100644
index 00000000000..a899e5837be
--- /dev/null
+++ b/include/net/irda/irttp.h
@@ -0,0 +1,210 @@
+/*********************************************************************
+ *                
+ * Filename:      irttp.h
+ * Version:       1.0
+ * Description:   Tiny Transport Protocol (TTP) definitions
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Sun Aug 31 20:14:31 1997
+ * Modified at:   Sun Dec 12 13:09:07 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>, 
+ *     All Rights Reserved.
+ *     Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
+ *     
+ *     This program is free software; you can redistribute it and/or 
+ *     modify it under the terms of the GNU General Public License as 
+ *     published by the Free Software Foundation; either version 2 of 
+ *     the License, or (at your option) any later version.
+ *
+ *     Neither Dag Brattli nor University of Tromsų admit liability nor
+ *     provide warranty for any of this software. This material is 
+ *     provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#ifndef IRTTP_H
+#define IRTTP_H
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlmp.h>		/* struct lsap_cb */
+#include <net/irda/qos.h>		/* struct qos_info */
+#include <net/irda/irqueue.h>
+
+#define TTP_MAX_CONNECTIONS    LM_MAX_CONNECTIONS
+#define TTP_HEADER             1
+#define TTP_MAX_HEADER         (TTP_HEADER + LMP_MAX_HEADER)
+#define TTP_SAR_HEADER         5
+#define TTP_PARAMETERS         0x80
+#define TTP_MORE               0x80
+
+/* Transmission queue sizes */
+/* Worst case scenario, two window of data - Jean II */
+#define TTP_TX_MAX_QUEUE	14
+/* We need to keep at least 5 frames to make sure that we can refill
+ * appropriately the LAP layer. LAP keeps only two buffers, and we need
+ * to have 7 to make a full window - Jean II */
+#define TTP_TX_LOW_THRESHOLD	5
+/* Most clients are synchronous with respect to flow control, so we can
+ * keep a low number of Tx buffers in TTP - Jean II */
+#define TTP_TX_HIGH_THRESHOLD	7
+
+/* Receive queue sizes */
+/* Minimum of credit that the peer should hold.
+ * If the peer has less credits than 9 frames, we will explicitely send
+ * him some credits (through irttp_give_credit() and a specific frame).
+ * Note that when we give credits it's likely that it won't be sent in
+ * this LAP window, but in the next one. So, we make sure that the peer
+ * has something to send while waiting for credits (one LAP window == 7
+ * + 1 frames while he process the credits). - Jean II */
+#define TTP_RX_MIN_CREDIT	8
+/* This is the default maximum number of credits held by the peer, so the
+ * default maximum number of frames he can send us before needing flow
+ * control answer from us (this may be negociated differently at TSAP setup).
+ * We want to minimise the number of times we have to explicitely send some
+ * credit to the peer, hoping we can piggyback it on the return data. In
+ * particular, it doesn't make sense for us to send credit more than once
+ * per LAP window.
+ * Moreover, giving credits has some latency, so we need strictly more than
+ * a LAP window, otherwise we may already have credits in our Tx queue.
+ * But on the other hand, we don't want to keep too many Rx buffer here
+ * before starting to flow control the other end, so make it exactly one
+ * LAP window + 1 + MIN_CREDITS. - Jean II */
+#define TTP_RX_DEFAULT_CREDIT	16
+/* Maximum number of credits we can allow the peer to have, and therefore
+ * maximum Rx queue size.
+ * Note that we try to deliver packets to the higher layer every time we
+ * receive something, so in normal mode the Rx queue will never contains
+ * more than one or two packets. - Jean II */
+#define TTP_RX_MAX_CREDIT	21
+
+/* What clients should use when calling ttp_open_tsap() */
+#define DEFAULT_INITIAL_CREDIT	TTP_RX_DEFAULT_CREDIT
+
+/* Some priorities for disconnect requests */
+#define P_NORMAL    0
+#define P_HIGH      1
+
+#define TTP_SAR_DISABLE 0
+#define TTP_SAR_UNBOUND 0xffffffff
+
+/* Parameters */
+#define TTP_MAX_SDU_SIZE 0x01
+
+/*
+ *  This structure contains all data assosiated with one instance of a TTP 
+ *  connection.
+ */
+struct tsap_cb {
+	irda_queue_t q;            /* Must be first */
+	magic_t magic;        /* Just in case */
+
+	__u8 stsap_sel;       /* Source TSAP */
+	__u8 dtsap_sel;       /* Destination TSAP */
+
+	struct lsap_cb *lsap; /* Corresponding LSAP to this TSAP */
+
+	__u8 connected;       /* TSAP connected */
+	 
+	__u8 initial_credit;  /* Initial credit to give peer */
+
+        int avail_credit;    /* Available credit to return to peer */
+	int remote_credit;   /* Credit held by peer TTP entity */
+	int send_credit;     /* Credit held by local TTP entity */
+	
+	struct sk_buff_head tx_queue; /* Frames to be transmitted */
+	struct sk_buff_head rx_queue; /* Received frames */
+	struct sk_buff_head rx_fragments;
+	int tx_queue_lock;
+	int rx_queue_lock;
+	spinlock_t lock;
+
+	notify_t notify;       /* Callbacks to client layer */
+
+	struct net_device_stats stats;
+	struct timer_list todo_timer; 
+
+	__u32 max_seg_size;     /* Max data that fit into an IrLAP frame */
+	__u8  max_header_size;
+
+	int   rx_sdu_busy;     /* RxSdu.busy */
+	__u32 rx_sdu_size;     /* Current size of a partially received frame */
+	__u32 rx_max_sdu_size; /* Max receive user data size */
+
+	int tx_sdu_busy;       /* TxSdu.busy */
+	__u32 tx_max_sdu_size; /* Max transmit user data size */
+
+	int close_pend;        /* Close, but disconnect_pend */
+	unsigned long disconnect_pend; /* Disconnect, but still data to send */
+	struct sk_buff *disconnect_skb;
+};
+
+struct irttp_cb {
+	magic_t    magic;	
+	hashbin_t *tsaps;
+};
+
+int  irttp_init(void);
+void irttp_cleanup(void);
+
+struct tsap_cb *irttp_open_tsap(__u8 stsap_sel, int credit, notify_t *notify);
+int irttp_close_tsap(struct tsap_cb *self);
+
+int irttp_data_request(struct tsap_cb *self, struct sk_buff *skb);
+int irttp_udata_request(struct tsap_cb *self, struct sk_buff *skb);
+
+int irttp_connect_request(struct tsap_cb *self, __u8 dtsap_sel, 
+			  __u32 saddr, __u32 daddr,
+			  struct qos_info *qos, __u32 max_sdu_size, 
+			  struct sk_buff *userdata);
+int irttp_connect_response(struct tsap_cb *self, __u32 max_sdu_size, 
+			    struct sk_buff *userdata);
+int irttp_disconnect_request(struct tsap_cb *self, struct sk_buff *skb,
+			     int priority);
+void irttp_flow_request(struct tsap_cb *self, LOCAL_FLOW flow);
+struct tsap_cb *irttp_dup(struct tsap_cb *self, void *instance);
+
+static __inline __u32 irttp_get_saddr(struct tsap_cb *self)
+{
+	return irlmp_get_saddr(self->lsap);
+}
+
+static __inline __u32 irttp_get_daddr(struct tsap_cb *self)
+{
+	return irlmp_get_daddr(self->lsap);
+}
+
+static __inline __u32 irttp_get_max_seg_size(struct tsap_cb *self)
+{
+	return self->max_seg_size;
+}
+
+/* After doing a irttp_dup(), this get one of the two socket back into
+ * a state where it's waiting incomming connections.
+ * Note : this can be used *only* if the socket is not yet connected
+ * (i.e. NO irttp_connect_response() done on this socket).
+ * - Jean II */
+static inline void irttp_listen(struct tsap_cb *self)
+{
+	irlmp_listen(self->lsap);
+	self->dtsap_sel = LSAP_ANY;
+}
+
+/* Return TRUE if the node is in primary mode (i.e. master)
+ * - Jean II */
+static inline int irttp_is_primary(struct tsap_cb *self)
+{
+	if ((self == NULL) ||
+	    (self->lsap == NULL) ||
+	    (self->lsap->lap == NULL) ||
+	    (self->lsap->lap->irlap == NULL))
+		return -2;
+	return(irlap_is_primary(self->lsap->lap->irlap));
+}
+
+#endif /* IRTTP_H */