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/*
* sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
*
* $Id: sysctl_net_ipv4.c,v 1.21 1997/10/17 01:21:18 davem Exp $
*
* Begun April 1, 1996, Mike Shaver.
* Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
*/
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/config.h>
#include <net/snmp.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/tcp.h>
/*
* TCP configuration parameters
*/
#define TCP_PMTU_DISC 0x00000001 /* perform PMTU discovery */
#define TCP_CONG_AVOID 0x00000002 /* congestion avoidance algorithm */
#define TCP_DELAY_ACKS 0x00000003 /* delayed ack stategy */
#if 0
static int boolean_min = 0;
static int boolean_max = 1;
#endif
/* From arp.c */
extern int sysctl_arp_res_time;
extern int sysctl_arp_dead_res_time;
extern int sysctl_arp_max_tries;
extern int sysctl_arp_timeout;
extern int sysctl_arp_check_interval;
extern int sysctl_arp_confirm_interval;
extern int sysctl_arp_confirm_timeout;
extern int sysctl_arp_max_pings;
/* From icmp.c */
extern int sysctl_icmp_echo_ignore_all;
extern int sysctl_icmp_echo_ignore_broadcasts;
/* From ip_fragment.c */
extern int sysctl_ipfrag_low_thresh;
extern int sysctl_ipfrag_high_thresh;
extern int sysctl_ipfrag_time;
extern int sysctl_tcp_cong_avoidance;
extern int sysctl_tcp_hoe_retransmits;
extern int sysctl_tcp_sack;
extern int sysctl_tcp_tsack;
extern int sysctl_tcp_timestamps;
extern int sysctl_tcp_window_scaling;
extern int sysctl_tcp_keepalive_time;
extern int sysctl_tcp_keepalive_probes;
extern int sysctl_tcp_max_ka_probes;
extern int sysctl_tcp_retries1;
extern int sysctl_tcp_retries2;
extern int sysctl_tcp_max_delay_acks;
extern int sysctl_tcp_fin_timeout;
extern int sysctl_tcp_syncookies;
extern int sysctl_tcp_syn_retries;
extern int sysctl_tcp_stdurg;
extern int sysctl_tcp_syn_taildrop;
extern int sysctl_max_syn_backlog;
/* From icmp.c */
extern int sysctl_icmp_sourcequench_time;
extern int sysctl_icmp_destunreach_time;
extern int sysctl_icmp_timeexceed_time;
extern int sysctl_icmp_paramprob_time;
extern int sysctl_icmp_echoreply_time;
int tcp_retr1_max = 255;
extern int tcp_sysctl_congavoid(ctl_table *ctl, int write, struct file * filp,
void *buffer, size_t *lenp);
struct ipv4_config ipv4_config = { 1, 1, 1, 0, };
#ifdef CONFIG_SYSCTL
struct ipv4_config ipv4_def_router_config = { 0, 1, 1, 1, 1, 1, 1, };
struct ipv4_config ipv4_def_host_config = { 1, 1, 1, 0, };
static
int ipv4_sysctl_forwarding(ctl_table *ctl, int write, struct file * filp,
void *buffer, size_t *lenp)
{
int val = IS_ROUTER;
int ret;
ret = proc_dointvec(ctl, write, filp, buffer, lenp);
if (write && IS_ROUTER != val) {
if (IS_ROUTER)
ipv4_config = ipv4_def_router_config;
else
ipv4_config = ipv4_def_host_config;
rt_cache_flush(0);
}
return ret;
}
static
int ipv4_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp,
void *buffer, size_t *lenp)
{
if (write)
rt_cache_flush(0);
return 0;
}
ctl_table ipv4_table[] = {
{NET_IPV4_ARP_RES_TIME, "arp_res_time",
&sysctl_arp_res_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_DEAD_RES_TIME, "arp_dead_res_time",
&sysctl_arp_dead_res_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_MAX_TRIES, "arp_max_tries",
&sysctl_arp_max_tries, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_MAX_PINGS, "arp_max_pings",
&sysctl_arp_max_pings, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_TIMEOUT, "arp_timeout",
&sysctl_arp_timeout, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_CHECK_INTERVAL, "arp_check_interval",
&sysctl_arp_check_interval, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ARP_CONFIRM_INTERVAL, "arp_confirm_interval",
&sysctl_arp_confirm_interval, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_ARP_CONFIRM_TIMEOUT, "arp_confirm_timeout",
&sysctl_arp_confirm_timeout, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_HOE_RETRANSMITS, "tcp_hoe_retransmits",
&sysctl_tcp_hoe_retransmits, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_SACK, "tcp_sack",
&sysctl_tcp_sack, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_TSACK, "tcp_tsack",
&sysctl_tcp_tsack, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_TIMESTAMPS, "tcp_timestamps",
&sysctl_tcp_timestamps, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_WINDOW_SCALING, "tcp_window_scaling",
&sysctl_tcp_window_scaling, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_VEGAS_CONG_AVOID, "tcp_vegas_cong_avoid",
&sysctl_tcp_cong_avoidance, sizeof(int), 0644,
NULL, &tcp_sysctl_congavoid },
{NET_IPV4_FORWARDING, "ip_forwarding",
&ip_statistics.IpForwarding, sizeof(int), 0644, NULL,
&ipv4_sysctl_forwarding},
{NET_IPV4_DEFAULT_TTL, "ip_default_ttl",
&ip_statistics.IpDefaultTTL, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_RFC1812_FILTER, "ip_rfc1812_filter",
&ipv4_config.rfc1812_filter, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_LOG_MARTIANS, "ip_log_martians",
&ipv4_config.log_martians, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_SOURCE_ROUTE, "ip_source_route",
&ipv4_config.source_route, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_SEND_REDIRECTS, "ip_send_redirects",
&ipv4_config.send_redirects, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_AUTOCONFIG, "ip_autoconfig",
&ipv4_config.autoconfig, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_BOOTP_RELAY, "ip_bootp_relay",
&ipv4_config.bootp_relay, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_PROXY_ARP, "ip_proxy_arp",
&ipv4_config.proxy_arp, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_NO_PMTU_DISC, "ip_no_pmtu_disc",
&ipv4_config.no_pmtu_disc, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_ACCEPT_REDIRECTS, "ip_accept_redirects",
&ipv4_config.accept_redirects, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_SECURE_REDIRECTS, "ip_secure_redirects",
&ipv4_config.secure_redirects, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_RFC1620_REDIRECTS, "ip_rfc1620_redirects",
&ipv4_config.rfc1620_redirects, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_RTCACHE_FLUSH, "ip_rtcache_flush",
NULL, sizeof(int), 0644, NULL,
&ipv4_sysctl_rtcache_flush},
{NET_IPV4_TCP_SYN_RETRIES, "tcp_syn_retries",
&sysctl_tcp_syn_retries, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_IPFRAG_HIGH_THRESH, "ipfrag_high_thresh",
&sysctl_ipfrag_high_thresh, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_IPFRAG_LOW_THRESH, "ipfrag_low_thresh",
&sysctl_ipfrag_low_thresh, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_IPFRAG_TIME, "ipfrag_time",
&sysctl_ipfrag_time, sizeof(int), 0644, NULL, &proc_dointvec_jiffies},
{NET_IPV4_TCP_MAX_KA_PROBES, "tcp_max_ka_probes",
&sysctl_tcp_max_ka_probes, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_TCP_KEEPALIVE_TIME, "tcp_keepalive_time",
&sysctl_tcp_keepalive_time, sizeof(int), 0644, NULL,
&proc_dointvec_jiffies},
{NET_IPV4_TCP_KEEPALIVE_PROBES, "tcp_keepalive_probes",
&sysctl_tcp_keepalive_probes, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_TCP_RETRIES1, "tcp_retries1",
&sysctl_tcp_retries1, sizeof(int), 0644, NULL, &proc_dointvec_minmax,
&sysctl_intvec, NULL, NULL, &tcp_retr1_max},
{NET_IPV4_TCP_RETRIES2, "tcp_retries2",
&sysctl_tcp_retries2, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_TCP_MAX_DELAY_ACKS, "tcp_max_delay_acks",
&sysctl_tcp_max_delay_acks, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_TCP_FIN_TIMEOUT, "tcp_fin_timeout",
&sysctl_tcp_fin_timeout, sizeof(int), 0644, NULL,
&proc_dointvec_jiffies},
#ifdef CONFIG_SYN_COOKIES
{NET_TCP_SYNCOOKIES, "tcp_syncookies",
&sysctl_tcp_syncookies, sizeof(int), 0644, NULL, &proc_dointvec},
#endif
{NET_TCP_STDURG, "tcp_stdurg", &sysctl_tcp_stdurg,
sizeof(int), 0644, NULL, &proc_dointvec},
{NET_TCP_SYN_TAILDROP, "tcp_syn_taildrop", &sysctl_tcp_syn_taildrop,
sizeof(int), 0644, NULL, &proc_dointvec},
{NET_TCP_MAX_SYN_BACKLOG, "tcp_max_syn_backlog", &sysctl_max_syn_backlog,
sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_LOCAL_PORT_RANGE, "ip_local_port_range",
&sysctl_local_port_range, sizeof(sysctl_local_port_range), 0644,
NULL, &proc_dointvec},
{NET_IPV4_ICMP_ECHO_IGNORE_ALL, "icmp_echo_ignore_all",
&sysctl_icmp_echo_ignore_all, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS, "icmp_echo_ignore_broadcasts",
&sysctl_icmp_echo_ignore_broadcasts, sizeof(int), 0644, NULL,
&proc_dointvec},
{NET_IPV4_ICMP_SOURCEQUENCH_RATE, "icmp_sourcequench_rate",
&sysctl_icmp_sourcequench_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ICMP_DESTUNREACH_RATE, "icmp_destunreach_rate",
&sysctl_icmp_destunreach_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ICMP_TIMEEXCEED_RATE, "icmp_timeexceed_rate",
&sysctl_icmp_timeexceed_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ICMP_PARAMPROB_RATE, "icmp_paramprob_rate",
&sysctl_icmp_paramprob_time, sizeof(int), 0644, NULL, &proc_dointvec},
{NET_IPV4_ICMP_ECHOREPLY_RATE, "icmp_echoreply_rate",
&sysctl_icmp_echoreply_time, sizeof(int), 0644, NULL, &proc_dointvec},
{0}
};
#endif /* CONFIG_SYSCTL */
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