[mirror_frr.git] / zebra / ipforward_proc.c

/*
 * Fetch ipforward value by reading /proc filesystem.
 * Copyright (C) 1997 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Zebra; see the file COPYING.  If not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.  
 */

#include <zebra.h>

char proc_net_snmp[] = "/proc/net/snmp";

static void
dropline (FILE *fp)
{
  int c;

  while ((c = getc (fp)) != '\n')
    ;
}

int
ipforward ()
{
  FILE *fp;
  int ipforwarding = 0;
  char *pnt;
  char buf[10];

  fp = fopen (proc_net_snmp, "r");

  if (fp == NULL)
    return -1;

  /* We don't care about the first line. */
  dropline (fp);
  
  /* Get ip_statistics.IpForwarding : 
     1 => ip forwarding enabled 
     2 => ip forwarding off. */
  pnt = fgets (buf, 6, fp);
  sscanf (buf, "Ip: %d", &ipforwarding);

  if (ipforwarding == 1)
    return 1;

  return 0;
}

/* char proc_ipv4_forwarding[] = "/proc/sys/net/ipv4/conf/all/forwarding"; */
char proc_ipv4_forwarding[] = "/proc/sys/net/ipv4/ip_forward";

int
ipforward_on ()
{
  FILE *fp;

  fp = fopen (proc_ipv4_forwarding, "w");
  
  if (fp == NULL)
    return -1;

  fprintf (fp, "1\n");

  fclose (fp);

  return ipforward ();
}

int
ipforward_off ()
{
  FILE *fp;

  fp = fopen (proc_ipv4_forwarding, "w");
  
  if (fp == NULL)
    return -1;

  fprintf (fp, "0\n");

  fclose (fp);

  return ipforward ();
}
#ifdef HAVE_IPV6

char proc_ipv6_forwarding[] = "/proc/sys/net/ipv6/conf/all/forwarding";

int
ipforward_ipv6 ()
{
  FILE *fp;
  char buf[5];
  int ipforwarding = 0;

  fp = fopen (proc_ipv6_forwarding, "r");

  if (fp == NULL)
    return -1;

  fgets (buf, 2, fp);
  sscanf (buf, "%d", &ipforwarding);

  return ipforwarding;
}

int
ipforward_ipv6_on ()
{
  FILE *fp;

  fp = fopen (proc_ipv6_forwarding, "w");
  
  if (fp == NULL)
    return -1;

  fprintf (fp, "1\n");

  fclose (fp);

  return ipforward_ipv6 ();
}

int
ipforward_ipv6_off ()
{
  FILE *fp;

  fp = fopen (proc_ipv6_forwarding, "w");
  
  if (fp == NULL)
    return -1;

  fprintf (fp, "0\n");

  fclose (fp);

  return ipforward_ipv6 ();
}
#endif /* HAVE_IPV6 */
Commit	Line	Data
718e3744	1	/*
	2	* Fetch ipforward value by reading /proc filesystem.
	3	* Copyright (C) 1997 Kunihiro Ishiguro
	4	*
	5	* This file is part of GNU Zebra.
	6	*
	7	* GNU Zebra is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	* GNU Zebra is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with GNU Zebra; see the file COPYING. If not, write to the Free
	19	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	20	* 02111-1307, USA.
	21	*/
	22
	23	#include <zebra.h>
	24
	25	char proc_net_snmp[] = "/proc/net/snmp";
	26
	27	static void
	28	dropline (FILE *fp)
	29	{
	30	int c;
	31
	32	while ((c = getc (fp)) != '\n')
	33	;
	34	}
	35
	36	int
	37	ipforward ()
	38	{
	39	FILE *fp;
	40	int ipforwarding = 0;
	41	char *pnt;
	42	char buf[10];
	43
	44	fp = fopen (proc_net_snmp, "r");
	45
	46	if (fp == NULL)
	47	return -1;
	48
	49	/* We don't care about the first line. */
	50	dropline (fp);
	51
	52	/* Get ip_statistics.IpForwarding :
	53	1 => ip forwarding enabled
	54	2 => ip forwarding off. */
	55	pnt = fgets (buf, 6, fp);
	56	sscanf (buf, "Ip: %d", &ipforwarding);
	57
	58	if (ipforwarding == 1)
	59	return 1;
	60
	61	return 0;
	62	}
	63
	64	/* char proc_ipv4_forwarding[] = "/proc/sys/net/ipv4/conf/all/forwarding"; */
65	char proc_ipv4_forwarding[] = "/proc/sys/net/ipv4/ip_forward";
66
67	int
68	ipforward_on ()
69	{
70	FILE *fp;
71
72	fp = fopen (proc_ipv4_forwarding, "w");
73
74	if (fp == NULL)
75	return -1;
76
77	fprintf (fp, "1\n");
78
79	fclose (fp);
80
81	return ipforward ();
82	}
83
84	int
85	ipforward_off ()
86	{
87	FILE *fp;
88
89	fp = fopen (proc_ipv4_forwarding, "w");
90
91	if (fp == NULL)
92	return -1;
93
94	fprintf (fp, "0\n");
95
96	fclose (fp);
97
98	return ipforward ();
99	}
100	#ifdef HAVE_IPV6
101
102	char proc_ipv6_forwarding[] = "/proc/sys/net/ipv6/conf/all/forwarding";
103
104	int
105	ipforward_ipv6 ()
106	{
107	FILE *fp;
108	char buf[5];
109	int ipforwarding = 0;
110
111	fp = fopen (proc_ipv6_forwarding, "r");
112
113	if (fp == NULL)
114	return -1;
115
116	fgets (buf, 2, fp);
117	sscanf (buf, "%d", &ipforwarding);
118
119	return ipforwarding;
120	}
121
122	int
123	ipforward_ipv6_on ()
124	{
125	FILE *fp;
126
127	fp = fopen (proc_ipv6_forwarding, "w");
128
129	if (fp == NULL)
130	return -1;
131
132	fprintf (fp, "1\n");
133
134	fclose (fp);
135
136	return ipforward_ipv6 ();
137	}
138
139	int
140	ipforward_ipv6_off ()
141	{
142	FILE *fp;
143
144	fp = fopen (proc_ipv6_forwarding, "w");
145
146	if (fp == NULL)
147	return -1;
148
149	fprintf (fp, "0\n");
150
151	fclose (fp);
152
153	return ipforward_ipv6 ();
154	}
155	#endif /* HAVE_IPV6 */