LXR linux-old/net/ipv4/sysctl_net

   1/*
   2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
   3 *
   4 * $Id: sysctl_net_ipv4.c,v 1.38 1999/01/02 16:51:48 davem Exp $
   5 *
   6 * Begun April 1, 1996, Mike Shaver.
   7 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
   8 */
   9
  10#include <linux/mm.h>
  11#include <linux/sysctl.h>
  12#include <linux/config.h>
  13#include <net/snmp.h>
  14#include <net/ip.h>
  15#include <net/route.h>
  16#include <net/tcp.h>
  17
  18/*
  19 *      TCP configuration parameters
  20 */
  21
  22#define TCP_PMTU_DISC   0x00000001      /* perform PMTU discovery         */
  23#define TCP_CONG_AVOID  0x00000002      /* congestion avoidance algorithm */
  24#define TCP_DELAY_ACKS  0x00000003      /* delayed ack stategy            */
  25
  26#if 0
  27static int boolean_min = 0;
  28static int boolean_max = 1;
  29#endif
  30
  31/* From icmp.c */
  32extern int sysctl_icmp_echo_ignore_all;
  33extern int sysctl_icmp_echo_ignore_broadcasts;
  34extern int sysctl_icmp_ignore_bogus_error_responses;
  35
  36/* From ip_fragment.c */
  37extern int sysctl_ipfrag_low_thresh;
  38extern int sysctl_ipfrag_high_thresh; 
  39extern int sysctl_ipfrag_time;
  40
  41/* From ip_output.c */
  42extern int sysctl_ip_dynaddr;
  43
  44/* From ip_masq.c */
  45extern int sysctl_ip_masq_debug;
  46
  47extern int sysctl_tcp_timestamps;
  48extern int sysctl_tcp_window_scaling;
  49extern int sysctl_tcp_sack;
  50extern int sysctl_tcp_retrans_collapse;
  51extern int sysctl_tcp_keepalive_time;
  52extern int sysctl_tcp_keepalive_probes;
  53extern int sysctl_tcp_max_ka_probes;
  54extern int sysctl_tcp_retries1;
  55extern int sysctl_tcp_retries2;
  56extern int sysctl_tcp_fin_timeout;
  57extern int sysctl_tcp_syncookies;
  58extern int sysctl_tcp_syn_retries;
  59extern int sysctl_tcp_stdurg;
  60extern int sysctl_tcp_rfc1337;
  61extern int sysctl_tcp_syn_taildrop; 
  62extern int sysctl_max_syn_backlog; 
  63
  64/* From icmp.c */
  65extern int sysctl_icmp_destunreach_time;
  66extern int sysctl_icmp_timeexceed_time;
  67extern int sysctl_icmp_paramprob_time;
  68extern int sysctl_icmp_echoreply_time;
  69
  70/* From igmp.c */
  71extern int sysctl_igmp_max_memberships;
  72
  73int tcp_retr1_max = 255; 
  74
  75struct ipv4_config ipv4_config;
  76
  77extern ctl_table ipv4_route_table[];
  78
  79#ifdef CONFIG_SYSCTL
  80
  81static
  82int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
  83                        void *buffer, size_t *lenp)
  84{
  85        int val = ipv4_devconf.forwarding;
  86        int ret;
  87
  88        ret = proc_dointvec(ctl, write, filp, buffer, lenp);
  89
  90        if (write && ipv4_devconf.forwarding != val)
  91                inet_forward_change();
  92
  93        return ret;
  94}
  95
  96
  97ctl_table ipv4_table[] = {
  98        {NET_IPV4_TCP_TIMESTAMPS, "tcp_timestamps",
  99         &sysctl_tcp_timestamps, sizeof(int), 0644, NULL,
 100         &proc_dointvec},
 101        {NET_IPV4_TCP_WINDOW_SCALING, "tcp_window_scaling",
 102         &sysctl_tcp_window_scaling, sizeof(int), 0644, NULL,
 103         &proc_dointvec},
 104        {NET_IPV4_TCP_SACK, "tcp_sack",
 105         &sysctl_tcp_sack, sizeof(int), 0644, NULL,
 106         &proc_dointvec},
 107        {NET_IPV4_TCP_RETRANS_COLLAPSE, "tcp_retrans_collapse",
 108         &sysctl_tcp_retrans_collapse, sizeof(int), 0644, NULL,
 109         &proc_dointvec},
 110        {NET_IPV4_FORWARD, "ip_forward",
 111         &ipv4_devconf.forwarding, sizeof(int), 0644, NULL,
 112         &ipv4_sysctl_forward},
 113        {NET_IPV4_DEFAULT_TTL, "ip_default_ttl",
 114         &ip_statistics.IpDefaultTTL, sizeof(int), 0644, NULL,
 115         &proc_dointvec},
 116        {NET_IPV4_AUTOCONFIG, "ip_autoconfig",
 117         &ipv4_config.autoconfig, sizeof(int), 0644, NULL,
 118         &proc_dointvec},
 119        {NET_IPV4_NO_PMTU_DISC, "ip_no_pmtu_disc",
 120         &ipv4_config.no_pmtu_disc, sizeof(int), 0644, NULL,
 121         &proc_dointvec},
 122        {NET_IPV4_TCP_SYN_RETRIES, "tcp_syn_retries",
 123         &sysctl_tcp_syn_retries, sizeof(int), 0644, NULL, &proc_dointvec},
 124        {NET_IPV4_IPFRAG_HIGH_THRESH, "ipfrag_high_thresh",
 125         &sysctl_ipfrag_high_thresh, sizeof(int), 0644, NULL, &proc_dointvec},
 126        {NET_IPV4_IPFRAG_LOW_THRESH, "ipfrag_low_thresh",
 127         &sysctl_ipfrag_low_thresh, sizeof(int), 0644, NULL, &proc_dointvec},
 128        {NET_IPV4_DYNADDR, "ip_dynaddr",
 129         &sysctl_ip_dynaddr, sizeof(int), 0644, NULL, &proc_dointvec},
 130#ifdef CONFIG_IP_MASQUERADE
 131        {NET_IPV4_IP_MASQ_DEBUG, "ip_masq_debug",
 132         &sysctl_ip_masq_debug, sizeof(int), 0644, NULL, &proc_dointvec},
 133#endif
 134        {NET_IPV4_IPFRAG_TIME, "ipfrag_time",
 135         &sysctl_ipfrag_time, sizeof(int), 0644, NULL, &proc_dointvec_jiffies},
 136        {NET_IPV4_TCP_MAX_KA_PROBES, "tcp_max_ka_probes",
 137         &sysctl_tcp_max_ka_probes, sizeof(int), 0644, NULL, &proc_dointvec},
 138        {NET_IPV4_TCP_KEEPALIVE_TIME, "tcp_keepalive_time",
 139         &sysctl_tcp_keepalive_time, sizeof(int), 0644, NULL, 
 140         &proc_dointvec_jiffies},
 141        {NET_IPV4_TCP_KEEPALIVE_PROBES, "tcp_keepalive_probes",
 142         &sysctl_tcp_keepalive_probes, sizeof(int), 0644, NULL, 
 143         &proc_dointvec},
 144        {NET_IPV4_TCP_RETRIES1, "tcp_retries1",
 145         &sysctl_tcp_retries1, sizeof(int), 0644, NULL, &proc_dointvec_minmax, 
 146         &sysctl_intvec, NULL, NULL, &tcp_retr1_max},
 147        {NET_IPV4_TCP_RETRIES2, "tcp_retries2",
 148         &sysctl_tcp_retries2, sizeof(int), 0644, NULL, &proc_dointvec},
 149        {NET_IPV4_TCP_FIN_TIMEOUT, "tcp_fin_timeout",
 150         &sysctl_tcp_fin_timeout, sizeof(int), 0644, NULL, 
 151         &proc_dointvec_jiffies},
 152#ifdef CONFIG_SYN_COOKIES
 153        {NET_TCP_SYNCOOKIES, "tcp_syncookies",
 154         &sysctl_tcp_syncookies, sizeof(int), 0644, NULL, &proc_dointvec},
 155#endif
 156        {NET_TCP_STDURG, "tcp_stdurg", &sysctl_tcp_stdurg,
 157         sizeof(int), 0644, NULL, &proc_dointvec},
 158        {NET_TCP_RFC1337, "tcp_rfc1337", &sysctl_tcp_rfc1337,
 159         sizeof(int), 0644, NULL, &proc_dointvec},
 160        {NET_TCP_MAX_SYN_BACKLOG, "tcp_max_syn_backlog", &sysctl_max_syn_backlog,
 161         sizeof(int), 0644, NULL, &proc_dointvec},
 162        {NET_IPV4_LOCAL_PORT_RANGE, "ip_local_port_range",
 163         &sysctl_local_port_range, sizeof(sysctl_local_port_range), 0644, 
 164         NULL, &proc_dointvec},
 165        {NET_IPV4_ICMP_ECHO_IGNORE_ALL, "icmp_echo_ignore_all",
 166         &sysctl_icmp_echo_ignore_all, sizeof(int), 0644, NULL,
 167         &proc_dointvec},
 168        {NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS, "icmp_echo_ignore_broadcasts",
 169         &sysctl_icmp_echo_ignore_broadcasts, sizeof(int), 0644, NULL,
 170         &proc_dointvec},
 171        {NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES, "icmp_ignore_bogus_error_responses",
 172         &sysctl_icmp_ignore_bogus_error_responses, sizeof(int), 0644, NULL,
 173         &proc_dointvec},
 174        {NET_IPV4_ICMP_DESTUNREACH_RATE, "icmp_destunreach_rate",
 175         &sysctl_icmp_destunreach_time, sizeof(int), 0644, NULL, &proc_dointvec},
 176        {NET_IPV4_ICMP_TIMEEXCEED_RATE, "icmp_timeexceed_rate",
 177         &sysctl_icmp_timeexceed_time, sizeof(int), 0644, NULL, &proc_dointvec},
 178        {NET_IPV4_ICMP_PARAMPROB_RATE, "icmp_paramprob_rate",
 179         &sysctl_icmp_paramprob_time, sizeof(int), 0644, NULL, &proc_dointvec},
 180        {NET_IPV4_ICMP_ECHOREPLY_RATE, "icmp_echoreply_rate",
 181         &sysctl_icmp_echoreply_time, sizeof(int), 0644, NULL, &proc_dointvec},
 182        {NET_IPV4_ROUTE, "route", NULL, 0, 0555, ipv4_route_table},
 183#ifdef CONFIG_IP_MULTICAST
 184        {NET_IPV4_IGMP_MAX_MEMBERSHIPS, "igmp_max_memberships",
 185         &sysctl_igmp_max_memberships, sizeof(int), 0644, NULL, &proc_dointvec},
 186#endif
 187        {0}
 188};
 189
 190#endif /* CONFIG_SYSCTL */
 191