patch-2.3.4 linux/net/decnet/sysctl_net_decnet.c

• Lines: 474
• Date: Wed May 26 09:36:36 1999
• Orig file: v2.3.3/linux/net/decnet/sysctl_net_decnet.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.3/linux/net/decnet/sysctl_net_decnet.c linux/net/decnet/sysctl_net_decnet.c
@@ -0,0 +1,473 @@
+/*
+ * DECnet       An implementation of the DECnet protocol suite for the LINUX
+ *              operating system.  DECnet is implemented using the  BSD Socket
+ *              interface as the means of communication with the user level.
+ *
+ *              DECnet sysctl support functions
+ *
+ * Author:      Steve Whitehouse <SteveW@ACM.org>
+ *
+ *
+ * Changes:
+ *
+ */
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/fs.h>
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include <net/neighbour.h>
+#include <net/dst.h>
+
+#include <asm/uaccess.h>
+
+#include <net/dn.h>
+#include <net/dn_dev.h>
+#include <net/dn_route.h>
+
+
+int decnet_debug_level = 0;
+int decnet_time_wait = 30;
+int decnet_dn_count = 3;
+int decnet_di_count = 5;
+int decnet_dr_count = 5;
+extern int decnet_dst_gc_interval;
+static int min_decnet_time_wait[] = { 5 };
+static int max_decnet_time_wait[] = { 600 };
+static int min_state_count[] = { 1 };
+static int max_state_count[] = { NSP_MAXRXTSHIFT };
+static int min_decnet_dst_gc_interval[] = { 1 };
+static int max_decnet_dst_gc_interval[] = { 60 };
+static char node_name[7] = "???";
+
+static struct ctl_table_header *dn_table_header = NULL;
+
+/*
+ * ctype.h :-)
+ */
+#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
+#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
+#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
+#define ISALPHA(x) (ISLOWER(x) || ISUPPER(x))
+#define INVALID_END_CHAR(x) (ISNUM(x) || ISALPHA(x))
+
+/*
+ * Simple routine to parse an ascii DECnet address
+ * into a network order address.
+ */
+static int parse_addr(dn_address *addr, char *str)
+{
+	dn_address area, node;
+
+	while(*str && !ISNUM(*str)) str++;
+
+	if (*str == 0)
+		return -1;
+
+	area = (*str++ - '0');
+	if (ISNUM(*str)) {
+		area *= 10;
+		area += (*str++ - '0');
+	}
+
+	if (*str++ != '.')
+		return -1;
+
+	if (!ISNUM(*str))
+		return -1;
+
+	node = *str++ - '0';
+	if (ISNUM(*str)) {
+		node *= 10;
+		node += (*str++ - '0');
+	}
+	if (ISNUM(*str)) {
+		node *= 10;
+		node += (*str++ - '0');
+	}
+	if (ISNUM(*str)) {
+		node *= 10;
+		node += (*str++ - '0');
+	}
+
+	if ((node > 1023) || (area > 63))
+		return -1;
+
+	if (INVALID_END_CHAR(*str))
+		return -1;
+
+	*addr = dn_htons((area << 10) | node);
+
+	return 0;
+}
+
+static char *node2str(int n)
+{
+	switch(n) {
+		case DN_RT_INFO_ENDN:
+			return "EndNode\n";
+		case DN_RT_INFO_L1RT:
+			return "Level 1 Router\n";
+		case DN_RT_INFO_L2RT:
+			return "Level 2 Router\n";
+	}
+
+	return "Unknown\n";
+}
+
+static int dn_node_type_strategy(ctl_table *table, int *name, int nlen,
+				void *oldval, size_t *oldlenp,
+				void *newval, size_t newlen,
+				void **context)
+{
+	int len;
+	int type;
+
+	if (oldval && oldlenp) {
+		if (get_user(len, oldlenp))
+			return -EFAULT;
+		if (len) {
+			if (len != sizeof(int))
+				return -EINVAL;
+			if (put_user(decnet_node_type, (int *)oldval))
+				return -EFAULT;
+		}
+	}
+
+	if (newval && newlen) {
+		if (newlen != sizeof(int))
+			return -EINVAL;
+
+		if (get_user(type, (int *)newval))
+			return -EFAULT;
+
+		switch(type) {
+			case DN_RT_INFO_ENDN: /* EndNode        */
+#ifdef CONFIG_DECNET_ROUTER
+			case DN_RT_INFO_L1RT: /* Level 1 Router */
+			case DN_RT_INFO_L2RT: /* Level 2 Router */
+#endif
+				break;
+			default:
+				return -EINVAL;
+		}
+
+		if (decnet_node_type != type) {
+			dn_dev_devices_off();
+			decnet_node_type = type;
+			dn_dev_devices_on();
+		}
+	}
+	return 0;
+}
+
+static int dn_node_type_handler(ctl_table *table, int write, 
+				struct file * filp,
+				void *buffer, size_t *lenp)
+{
+	char *s = node2str(decnet_node_type);
+	int len = strlen(s);
+
+	if (!*lenp || (filp->f_pos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+
+	if (write) {
+		char c = *(char *)buffer;
+		int type = 0;
+
+		switch(c) {
+			case 'e':
+			case 'E':
+			case '0':
+				type = DN_RT_INFO_ENDN;
+				break;
+#ifdef CONFIG_DECNET_ROUTER
+			case 'r':
+			case '1':
+				type = DN_RT_INFO_L1RT;
+				break;
+			case 'R':
+			case '2':
+				type = DN_RT_INFO_L2RT;
+				break;
+#endif /* CONFIG_DECNET_ROUTER */
+			default:
+				return -EINVAL;	
+		}
+
+		if (decnet_node_type != type) {
+			dn_dev_devices_off();
+			decnet_node_type = type;
+			dn_dev_devices_on();
+		}
+
+		filp->f_pos += 1;
+
+		return 0;
+	}
+
+	if (len > *lenp) len = *lenp;
+
+	if (copy_to_user(buffer, s, len))
+		return -EFAULT;
+
+	*lenp = len;
+	filp->f_pos += len;
+
+	return 0;
+}
+
+static int dn_node_address_strategy(ctl_table *table, int *name, int nlen,
+				void *oldval, size_t *oldlenp,
+				void *newval, size_t newlen,
+				void **context)
+{
+	int len;
+	dn_address addr;
+
+	if (oldval && oldlenp) {
+		if (get_user(len, oldlenp))
+			return -EFAULT;
+		if (len) {
+			if (len != sizeof(unsigned short))
+				return -EINVAL;
+			if (put_user(decnet_address, (unsigned short *)oldval))
+				return -EFAULT;
+		}
+	}
+	if (newval && newlen) {
+		if (newlen != sizeof(unsigned short))
+			return -EINVAL;
+		if (get_user(addr, (unsigned short *)newval))
+			return -EFAULT;
+
+		dn_dev_devices_off();
+
+		decnet_address = addr;
+		dn_dn2eth(decnet_ether_address, decnet_address);
+
+		dn_dev_devices_on();
+	}
+	return 0;
+}
+
+static int dn_node_address_handler(ctl_table *table, int write, 
+				struct file *filp,
+				void *buffer, size_t *lenp)
+{
+	char addr[DN_ASCBUF_LEN];
+	int len;
+	dn_address dnaddr;
+
+	if (!*lenp || (filp->f_pos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+
+	if (write) {
+		int len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
+
+		if (copy_from_user(addr, buffer, len))
+			return -EFAULT;
+
+		addr[len] = 0;
+
+		if (parse_addr(&dnaddr, buffer))
+			return -EINVAL;
+
+		dn_dev_devices_off();
+
+		decnet_address = dnaddr;
+		dn_dn2eth(decnet_ether_address, decnet_address);
+
+		dn_dev_devices_on();
+
+		filp->f_pos += len;
+
+		return 0;
+	}
+
+	dn_addr2asc(dn_ntohs(decnet_address), addr);
+	len = strlen(addr);
+	addr[len++] = '\n';
+
+	if (len > *lenp) len = *lenp;
+
+	if (copy_to_user(buffer, addr, len))
+		return -EFAULT;
+
+	*lenp = len;
+	filp->f_pos += len;
+
+	return 0;
+}
+
+
+static int dn_def_dev_strategy(ctl_table *table, int *name, int nlen,
+				void *oldval, size_t *oldlenp,
+				void *newval, size_t newlen,
+				void **context)
+{
+	size_t len;
+	struct device *dev = decnet_default_device;
+	char devname[17];
+	size_t namel;
+
+	devname[0] = 0;
+
+	if (oldval && oldlenp) {
+		if (get_user(len, oldlenp))
+			return -EFAULT;
+		if (len) {
+			if (dev)
+				strcpy(devname, dev->name);
+
+			namel = strlen(devname) + 1;
+			if (len > namel) len = namel;	
+
+			if (copy_to_user(oldval, devname, len))
+				return -EFAULT;
+
+			if (put_user(len, oldlenp))
+				return -EFAULT;
+		}
+	}
+
+	if (newval && newlen) {
+		if (newlen > 16)
+			return -E2BIG;
+
+		if (copy_from_user(devname, newval, newlen))
+			return -EFAULT;
+
+		devname[newlen] = 0;
+
+		if ((dev = dev_get(devname)) == NULL)
+			return -ENODEV;
+
+		if (dev->dn_ptr == NULL)
+			return -ENODEV;
+
+		decnet_default_device = dev;
+	}
+
+	return 0;
+}
+
+
+static int dn_def_dev_handler(ctl_table *table, int write, 
+				struct file * filp,
+				void *buffer, size_t *lenp)
+{
+	int len;
+	struct device *dev = decnet_default_device;
+	char devname[17];
+
+	if (!*lenp || (filp->f_pos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+
+	if (write) {
+
+		if (*lenp > 16)
+			return -E2BIG;
+
+		if (copy_from_user(devname, buffer, *lenp))
+			return -EFAULT;
+
+		devname[*lenp] = 0;
+
+		if ((dev = dev_get(devname)) == NULL)
+			return -ENODEV;
+
+		if (dev->dn_ptr == NULL)
+			return -ENODEV;
+
+		decnet_default_device = dev;
+		filp->f_pos += *lenp;
+
+		return 0;
+	}
+
+	if (dev == NULL) {
+		*lenp = 0;
+		return 0;
+	}
+
+	strcpy(devname, dev->name);
+	len = strlen(devname);
+	devname[len++] = '\n';
+
+	if (len > *lenp) len = *lenp;
+
+	if (copy_to_user(buffer, devname, len))
+		return -EFAULT;
+
+	*lenp = len;
+	filp->f_pos += len;
+
+	return 0;
+}
+
+static ctl_table dn_table[] = {
+	{NET_DECNET_NODE_TYPE, "node_type", NULL, 1, 0644, NULL,
+	dn_node_type_handler, dn_node_type_strategy, NULL,
+	NULL, NULL},
+	{NET_DECNET_NODE_ADDRESS, "node_address", NULL, 7, 0644, NULL,
+	dn_node_address_handler, dn_node_address_strategy, NULL,
+	NULL, NULL},
+	{NET_DECNET_NODE_NAME, "node_name", node_name, 7, 0644, NULL,
+	&proc_dostring, &sysctl_string, NULL, NULL, NULL},
+	{NET_DECNET_DEFAULT_DEVICE, "default_device", NULL, 16, 0644, NULL,
+	dn_def_dev_handler, dn_def_dev_strategy, NULL, NULL, NULL},
+	{NET_DECNET_TIME_WAIT, "time_wait", &decnet_time_wait,
+	sizeof(int), 0644,
+	NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
+	&min_decnet_time_wait, &max_decnet_time_wait},
+	{NET_DECNET_DN_COUNT, "dn_count", &decnet_dn_count,
+	sizeof(int), 0644,
+	NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
+	&min_state_count, &max_state_count},
+	{NET_DECNET_DI_COUNT, "di_count", &decnet_di_count,
+	sizeof(int), 0644,
+	NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
+	&min_state_count, &max_state_count},
+	{NET_DECNET_DR_COUNT, "dr_count", &decnet_dr_count,
+	sizeof(int), 0644,
+	NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
+	&min_state_count, &max_state_count},
+	{NET_DECNET_DST_GC_INTERVAL, "dst_gc_interval", &decnet_dst_gc_interval,
+	sizeof(int), 0644,
+	NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
+	&min_decnet_dst_gc_interval, &max_decnet_dst_gc_interval},
+	{NET_DECNET_DEBUG_LEVEL, "debug", &decnet_debug_level, 
+	sizeof(int), 0644, 
+	NULL, &proc_dointvec, &sysctl_intvec, NULL,
+	NULL, NULL},
+	{0}
+};
+
+static ctl_table dn_dir_table[] = {
+	{NET_DECNET, "decnet", NULL, 0, 0555, dn_table},
+	{0}
+};
+
+static ctl_table dn_root_table[] = {
+	{CTL_NET, "net", NULL, 0, 0555, dn_dir_table},
+	{0}
+};
+
+void dn_register_sysctl(void)
+{
+	dn_table_header = register_sysctl_table(dn_root_table, 1);
+}
+
+void dn_unregister_sysctl(void)
+{
+	unregister_sysctl_table(dn_table_header);
+}
+