patch-2.1.9 linux/net/ax25/ax25_timer.c

• Lines: 320
• Date: Sun Nov 10 19:12:58 1996
• Orig file: v2.1.8/linux/net/ax25/ax25_timer.c
• Orig date: Tue Oct 29 19:58:49 1996

diff -u --recursive --new-file v2.1.8/linux/net/ax25/ax25_timer.c linux/net/ax25/ax25_timer.c
@@ -1,5 +1,5 @@
 /*
- *	AX.25 release 032
+ *	AX.25 release 033
  *
  *	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. 
@@ -19,10 +19,11 @@
  *	AX.25 029	Alan(GW4PTS)	Switched to KA9Q constant names.
  *	AX.25 031	Joerg(DL1BKE)	Added DAMA support
  *	AX.25 032	Joerg(DL1BKE)	Fixed DAMA timeout bug
+ *	AX.25 033	Jonathan(G4KLX)	Modularisation functions.
  */
 
 #include <linux/config.h>
-#ifdef CONFIG_AX25
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/socket.h>
@@ -43,9 +44,6 @@
 #include <linux/fcntl.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
-#ifdef CONFIG_NETROM
-#include <net/netrom.h>
-#endif
 
 static void ax25_timer(unsigned long);
 
@@ -144,16 +142,14 @@
 		/* dl1bke 960114: T3 expires and we are in DAMA mode:  */
 		/*                send a DISC and abort the connection */
 		if (ax25->dama_slave) {
-#ifdef CONFIG_NETROM
-			nr_link_failed(&ax25->dest_addr, ax25->device);
-#endif
+			ax25_link_failed(&ax25->dest_addr, ax25->device);
 			ax25_clear_queues(ax25);
 			ax25_send_control(ax25, DISC, POLLON, C_COMMAND);
 				
 			ax25->state = AX25_STATE_0;
 			if (ax25->sk != NULL) {
 				if (ax25->sk->debug)
-					printk("T3 Timeout\n");
+					printk(KERN_DEBUG "AX.25 T3 Timeout\n");
 				ax25->sk->state = TCP_CLOSE;
 				ax25->sk->err   = ETIMEDOUT;
 				if (!ax25->sk->dead)
@@ -237,9 +233,7 @@
 		case AX25_STATE_1: 
 			if (ax25->n2count == ax25->n2) {
 				if (ax25->modulus == MODULUS) {
-#ifdef CONFIG_NETROM
-					nr_link_failed(&ax25->dest_addr, ax25->device);
-#endif
+					ax25_link_failed(&ax25->dest_addr, ax25->device);
 					ax25_clear_queues(ax25);
 					ax25->state = AX25_STATE_0;
 					if (ax25->sk != NULL) {
@@ -267,9 +261,7 @@
 
 		case AX25_STATE_2:
 			if (ax25->n2count == ax25->n2) {
-#ifdef CONFIG_NETROM
-				nr_link_failed(&ax25->dest_addr, ax25->device);
-#endif
+				ax25_link_failed(&ax25->dest_addr, ax25->device);
 				ax25_clear_queues(ax25);
 				ax25->state = AX25_STATE_0;
 				ax25_send_control(ax25, DISC, POLLON, C_COMMAND);
@@ -297,15 +289,13 @@
 
 		case AX25_STATE_4:
 			if (ax25->n2count == ax25->n2) {
-#ifdef CONFIG_NETROM
-				nr_link_failed(&ax25->dest_addr, ax25->device);
-#endif
+				ax25_link_failed(&ax25->dest_addr, ax25->device);
 				ax25_clear_queues(ax25);
 				ax25_send_control(ax25, DM, POLLON, C_RESPONSE);
 				ax25->state = AX25_STATE_0;
 				if (ax25->sk != NULL) {
 					if (ax25->sk->debug)
-						printk("Link Failure\n");
+						printk(KERN_DEBUG "AX.25 link Failure\n");
 					ax25->sk->state = TCP_CLOSE;
 					ax25->sk->err   = ETIMEDOUT;
 					if (!ax25->sk->dead)
@@ -323,6 +313,230 @@
 	ax25->t1timer = ax25->t1 = ax25_calculate_t1(ax25);
 
 	ax25_set_timer(ax25);
+}
+
+/************************************************************************/
+/*	Module support functions follow.				*/
+/************************************************************************/
+
+static struct protocol_struct {
+	struct protocol_struct *next;
+	unsigned int pid;
+	int (*func)(struct sk_buff *, ax25_cb *);
+} *protocol_list = NULL;
+
+static struct linkfail_struct {
+	struct linkfail_struct *next;
+	void (*func)(ax25_address *, struct device *);
+} *linkfail_list = NULL;
+
+static struct listen_struct {
+	struct listen_struct *next;
+	ax25_address  callsign;
+	struct device *dev;
+} *listen_list = NULL;
+
+int ax25_protocol_register(unsigned int pid, int (*func)(struct sk_buff *, ax25_cb *))
+{
+	struct protocol_struct *protocol;
+	unsigned long flags;
+
+	if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
+		return 0;
+#ifdef CONFIG_INET
+	if (pid == AX25_P_IP || pid == AX25_P_ARP)
+		return 0;
+#endif
+	if ((protocol = (struct protocol_struct *)kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	protocol->pid  = pid;
+	protocol->func = func;
+	
+	save_flags(flags);
+	cli();
+	
+	protocol->next = protocol_list;
+	protocol_list  = protocol;
+	
+	restore_flags(flags);
+
+	return 1;
+}
+
+void ax25_protocol_release(unsigned int pid)
+{
+	struct protocol_struct *s, *protocol = protocol_list;
+	unsigned long flags;
+
+	if (protocol == NULL)
+		return;
+
+	save_flags(flags);
+	cli();
+
+	if (protocol->pid == pid) {
+		protocol_list = protocol->next;
+		restore_flags(flags);
+		kfree_s(protocol, sizeof(struct protocol_struct));
+		return;
+	}
+
+	while (protocol != NULL && protocol->next != NULL) {
+		if (protocol->next->pid == pid) {
+			s = protocol->next;
+			protocol->next = protocol->next->next;
+			restore_flags(flags);
+			kfree_s(s, sizeof(struct protocol_struct));
+			return;
+		}
+		
+		protocol = protocol->next;
+	}
+	
+	restore_flags(flags);
+}
+
+int ax25_linkfail_register(void (*func)(ax25_address *, struct device *))
+{
+	struct linkfail_struct *linkfail;
+	unsigned long flags;
+
+	if ((linkfail = (struct linkfail_struct *)kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	linkfail->func = func;
+	
+	save_flags(flags);
+	cli();
+	
+	linkfail->next = linkfail_list;
+	linkfail_list  = linkfail;
+	
+	restore_flags(flags);
+
+	return 1;
+}
+
+void ax25_linkfail_release(void (*func)(ax25_address *, struct device *))
+{
+	struct linkfail_struct *s, *linkfail = linkfail_list;
+	unsigned long flags;
+
+	if (linkfail == NULL)
+		return;
+
+	save_flags(flags);
+	cli();
+
+	if (linkfail->func == func) {
+		linkfail_list = linkfail->next;
+		restore_flags(flags);
+		kfree_s(linkfail, sizeof(struct linkfail_struct));
+		return;
+	}
+
+	while (linkfail != NULL && linkfail->next != NULL) {
+		if (linkfail->next->func == func) {
+			s = linkfail->next;
+			linkfail->next = linkfail->next->next;
+			restore_flags(flags);
+			kfree_s(s, sizeof(struct linkfail_struct));
+			return;
+		}
+		
+		linkfail = linkfail->next;
+	}
+	
+	restore_flags(flags);
+}
+
+int ax25_listen_register(ax25_address *callsign, struct device *dev)
+{
+	struct listen_struct *listen;
+	unsigned long flags;
+
+	if (ax25_listen_mine(callsign, dev))
+		return 0;
+
+	if ((listen = (struct listen_struct *)kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	listen->callsign = *callsign;
+	listen->dev      = dev;
+	
+	save_flags(flags);
+	cli();
+	
+	listen->next = listen_list;
+	listen_list  = listen;
+	
+	restore_flags(flags);
+
+	return 1;
+}
+
+void ax25_listen_release(ax25_address *callsign, struct device *dev)
+{
+	struct listen_struct *s, *listen = listen_list;
+	unsigned long flags;
+
+	if (listen == NULL)
+		return;
+
+	save_flags(flags);
+	cli();
+
+	if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
+		listen_list = listen->next;
+		restore_flags(flags);
+		kfree_s(listen, sizeof(struct listen_struct));
+		return;
+	}
+
+	while (listen != NULL && listen->next != NULL) {
+		if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
+			s = listen->next;
+			listen->next = listen->next->next;
+			restore_flags(flags);
+			kfree_s(s, sizeof(struct listen_struct));
+			return;
+		}
+		
+		listen = listen->next;
+	}
+	
+	restore_flags(flags);
+}
+
+int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
+{
+	struct protocol_struct *protocol;
+
+	for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
+		if (protocol->pid == pid)
+			return protocol->func;
+
+	return NULL;
+}
+
+int ax25_listen_mine(ax25_address *callsign, struct device *dev)
+{
+	struct listen_struct *listen;
+
+	for (listen = listen_list; listen != NULL; listen = listen->next)
+		if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL))
+			return 1;
+
+	return 0;
+}
+
+void ax25_link_failed(ax25_address *callsign, struct device *dev)
+{
+	struct linkfail_struct *linkfail;
+	
+	for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next)
+		(linkfail->func)(callsign, dev);
 }
 
 #endif