1 files changed, 133 insertions, 0 deletions
diff --git a/net/ax25/ax25_ctl.c b/net/ax25/ax25_ctl.c
new file mode 100644
index 000000000..da4cd49c8
--- /dev/null
+++ b/net/ax25/ax25_ctl.c
@@ -0,0 +1,133 @@
+/*
+ * ax25_ctl.c:  Implements ioctl()s on persisting VC sockets (NEW-AX.25)
+ *
+ * Authors:     Jens David (DG1KJD), Matthias Welwarsky (DG2FEF), Joerg (DL1BKE)
+ *
+ * Comment:
+ *
+ * Changelog:
+ *
+ * License:     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.
+ */
+
+#include <asm/uaccess.h>
+#include <linux/ax25.h>
+#include <net/ax25.h>
+
+#include "af_ax25.h"
+#include "ax25_in.h"
+#include "ax25_subr.h"
+#include "ax25_timer.h"
+
+/*
+ * dl1bke 960311: set parameters for existing AX.25 connections,
+ *		  includes a KILL command to abort any connection.
+ *		  VERY useful for debugging ;-)
+ */
+int ax25_ctl_ioctl(const unsigned int cmd, void *arg)
+{
+	struct ax25_ctl_struct ax25_ctl;
+	struct net_device *dev;
+	ax25_cb *ax25;
+	ax25_addr_t addr;
+	int err;
+
+	if ((err = verify_area(VERIFY_READ, arg, sizeof(ax25_ctl))) != 0)
+		return err;
+
+	if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
+		return -EFAULT;;
+
+	if ((dev = ax25rtr_get_dev(&ax25_ctl.port_addr)) == NULL)
+		return -ENODEV;
+
+	addr.src    = ax25_ctl.source_addr;
+	addr.dest   = ax25_ctl.dest_addr;
+	addr.dcount = 0;
+
+	if ((ax25 = ax25_find_cb(&addr, dev)) == NULL)
+		return -ENOTCONN;
+
+	switch (ax25_ctl.cmd) {
+		case AX25_KILL:
+			ax25_tx_command(ax25, AX25_DISC, AX25_POLLON);
+			ax25_set_cond(ax25, AX25_COND_STATE_CHANGE);
+			ax25_disconnect(ax25, ENETRESET);
+			if (ax25->sk)
+				ax25_close_socket(ax25->sk, ENETRESET);
+			break;
+
+		case AX25_WINDOW:
+			if (ax25->seqmask == AX25_SEQMASK) {
+				if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
+					return -EINVAL;
+			} else {
+				if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
+					return -EINVAL;
+			}
+			ax25->window = ax25_ctl.arg;
+			break;
+
+		case AX25_T1:
+			if (ax25_ctl.arg < 1)
+				return -EINVAL;
+			ax25->rtt = (ax25_ctl.arg * AX25_TICS) / 4;
+			ax25->t1  = ax25_ctl.arg;
+			write_lock(&ax25->timer_lock);
+			if (ax25->wrt_timer > ax25->t1)
+				ax25->wrt_timer = ax25->t1;
+			write_unlock(&ax25->timer_lock);
+			break;
+
+		case AX25_T2:
+			if (ax25_ctl.arg < 0)
+				return -EINVAL;
+			ax25->t2 = ax25_ctl.arg;
+			write_lock(&ax25->timer_lock);
+			if (ax25->ack_timer > ax25->t2)
+				ax25->ack_timer = ax25->t2;
+			write_unlock(&ax25->timer_lock);
+			break;
+
+		case AX25_N2:
+			if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
+				return -EINVAL;
+			ax25->n2count = 0;
+			ax25->n2 = ax25_ctl.arg;
+			break;
+
+		case AX25_T3:
+			if (ax25_ctl.arg < 0)
+				return -EINVAL;
+			ax25->t3 = ax25_ctl.arg * AX25_SLOWHZ;
+			write_lock(&ax25->timer_lock);
+			if (ax25->wrt_timer != 0)
+				ax25->wrt_timer = ax25->t3;
+			write_unlock(&ax25->timer_lock);
+			break;
+
+		case AX25_IDLE:
+			if (ax25_ctl.arg < 0)
+				return -EINVAL;
+			ax25->idle = ax25_ctl.arg * AX25_SLOWHZ;
+			write_lock(&ax25->timer_lock);
+			if (ax25->idletimer != 0)
+				ax25->idletimer = ax25->idle;
+			write_unlock(&ax25->timer_lock);
+			break;
+
+		case AX25_PACLEN:
+			if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
+				return -EINVAL;
+			ax25->paclen = ax25_ctl.arg;
+			break;
+
+		default:
+			return -EINVAL;
+	  }
+
+	  return 0;
+}