linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * 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:

 * Steve Whitehouse - C99 changes and default device handling

 * Steve Whitehouse - Memory buffer settings, like the tcp ones

 *

 */

#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 <net/flow.h>

​

#include <linux/uaccess.h>

​

#include <net/dn.h>

#include <net/dn_dev.h>

#include <net/dn_route.h>

​

​

int decnet_debug_level;

int decnet_time_wait = 30;

int decnet_dn_count = 1;

int decnet_di_count = 3;

int decnet_dr_count = 3;

int decnet_log_martians = 1;

int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;

​

/* Reasonable defaults, I hope, based on tcp's defaults */

long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };

int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };

int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };

​

#ifdef CONFIG_SYSCTL

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 int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };

static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };

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))

​

static void strip_it(char *str)

{

    for(;;) {

        switch (*str) {

        case ' ':

        case '\n':

        case '\r':

        case ':':

            *str = 0;

            /* Fallthrough */

        case 0:

            return;

        }

        str++;

    }

}

​

/*

 * Simple routine to parse an ascii DECnet address

 * into a network order address.

 */

static int parse_addr(__le16 *addr, char *str)

{

    __u16 area, node;