Import of Linux/MIPS 1.3.0

1 files changed, 192 insertions, 0 deletions

diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c
new file mode 100644
index 000000000..2e9269f13
--- /dev/null
+++ b/net/netrom/nr_timer.c
@@ -0,0 +1,192 @@
+/*
+ *	NET/ROM release 002
+ *
+ *	This is ALPHA test software. This code may break your machine, randomly fail to work with new 
+ *	releases, misbehave and/or generally screw up. It might even work. 
+ *
+ *	This code REQUIRES 1.2.1 or higher/ NET3.029
+ *
+ *	This module:
+ *		This module 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.
+ *
+ *	History
+ *	NET/ROM 001	Jonathan(G4KLX)	Cloned from ax25_timer.c
+ */
+
+#include <linux/config.h>
+#ifdef CONFIG_NETROM
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <asm/segment.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/netrom.h>
+
+static void nr_timer(unsigned long);
+
+/*
+ *	Linux set/reset timer routines
+ */
+void nr_set_timer(struct sock *sk)
+{
+	unsigned long flags;
+	
+	save_flags(flags);
+	cli();
+	del_timer(&sk->timer);
+	restore_flags(flags);
+
+	sk->timer.next     = sk->timer.prev = NULL;	
+	sk->timer.data     = (unsigned long)sk;
+	sk->timer.function = &nr_timer;
+
+	sk->timer.expires = 10;
+	add_timer(&sk->timer);
+}
+
+static void nr_reset_timer(struct sock *sk)
+{
+	unsigned long flags;
+	
+	save_flags(flags);
+	cli();
+	del_timer(&sk->timer);
+	restore_flags(flags);
+
+	sk->timer.data     = (unsigned long)sk;
+	sk->timer.function = &nr_timer;
+	sk->timer.expires  = 10;
+	add_timer(&sk->timer);
+}
+
+/*
+ *	NET/ROM TIMER 
+ *
+ *	This routine is called every 500ms. Decrement timer by this
+ *	amount - if expired then process the event.
+ */
+static void nr_timer(unsigned long param)
+{
+	struct sock *sk = (struct sock *)param;
+
+	switch (sk->nr->state) {
+		case NR_STATE_0:
+			/* Magic here: If we listen() and a new link dies before it
+			   is accepted() it isnt 'dead' so doesnt get removed. */
+			if (sk->dead) {
+				del_timer(&sk->timer);
+				nr_destroy_socket(sk);
+				return;
+			}
+			break;
+
+		case NR_STATE_3:
+			/*
+			 * Check for the state of the receive buffer.
+			 */
+			if (sk->rmem_alloc < (sk->rcvbuf / 2) && (sk->nr->condition & OWN_RX_BUSY_CONDITION)) {
+				sk->nr->condition &= ~OWN_RX_BUSY_CONDITION;
+				nr_write_internal(sk, NR_INFOACK);
+				sk->nr->condition &= ~ACK_PENDING_CONDITION;
+				sk->nr->vl = sk->nr->vr;
+				break;
+			}
+			/*
+			 * Check for frames to transmit.
+			 */
+			nr_kick(sk);
+			break;
+
+		default:
+			break;
+	}
+
+	if (sk->nr->t2timer > 0 && --sk->nr->t2timer == 0) {
+		if (sk->nr->state == NR_STATE_3) {
+			if (sk->nr->condition & ACK_PENDING_CONDITION) {
+				sk->nr->condition &= ~ACK_PENDING_CONDITION;
+				nr_enquiry_response(sk);
+			}
+		}
+	}
+
+	if (sk->nr->t4timer > 0 && --sk->nr->t4timer == 0) {
+		sk->nr->condition &= ~PEER_RX_BUSY_CONDITION;
+	}
+
+	if (sk->nr->t1timer == 0 || --sk->nr->t1timer > 0) {
+		nr_reset_timer(sk);
+		return;
+	}
+
+	switch (sk->nr->state) {
+		case NR_STATE_1: 
+			if (sk->nr->n2count == sk->nr->n2) {
+				nr_clear_tx_queue(sk);
+				sk->nr->state = NR_STATE_0;
+				sk->state     = TCP_CLOSE;
+				sk->err       = ETIMEDOUT;
+				if (!sk->dead)
+					sk->state_change(sk);
+				sk->dead      = 1;
+			} else {
+				sk->nr->n2count++;
+				nr_write_internal(sk, NR_CONNREQ);
+			}
+			break;
+
+		case NR_STATE_2:
+			if (sk->nr->n2count == sk->nr->n2) {
+				nr_clear_tx_queue(sk);
+				sk->nr->state = NR_STATE_0;
+				sk->state     = TCP_CLOSE;
+				sk->err       = ETIMEDOUT;
+				if (!sk->dead)
+					sk->state_change(sk);
+				sk->dead      = 1;
+			} else {
+				sk->nr->n2count++;
+				nr_write_internal(sk, NR_DISCREQ);
+			}
+			break;
+
+		case NR_STATE_3:
+			if (sk->nr->n2count == sk->nr->n2) {
+				nr_clear_tx_queue(sk);
+				sk->nr->state = NR_STATE_0;
+				sk->state     = TCP_CLOSE;
+				sk->err       = ETIMEDOUT;
+				if (!sk->dead)
+					sk->state_change(sk);
+				sk->dead      = 1;
+			} else {
+				sk->nr->n2count++;
+				nr_requeue_frames(sk);
+			}
+			break;
+	}
+
+	sk->nr->t1timer = sk->nr->t1 = nr_calculate_t1(sk);
+
+	nr_set_timer(sk);
+}
+
+#endif