net/ipv4/sysctl_net_ipv4.c

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 1 /*
 2  * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
 3  *
 4  * Begun April 1, 1996, Mike Shaver.
 5  * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
 6  */
 7
 8 #include <linux/mm.h>
 9 #include <linux/sysctl.h>
 10 #include <linux/config.h>
 11 #include <net/snmp.h>
 12 #include <net/ip.h>
 13 #include <net/route.h>
 14 #include <net/tcp.h>
 15
 16 /*
 17  * TCP configuration parameters
 18  */
 19
 20 #define TCP_PMTU_DISC 0x00000001/* perform PMTU discovery */
 21 #define TCP_CONG_AVOID 0x00000002/* congestion avoidance algorithm */
 22 #define TCP_DELAY_ACKS 0x00000003/* delayed ack stategy */
 23
 24 #if 0
 25 static int boolean_min =0;
 26 static int boolean_max =1;
 27 #endif
 28
 29 /* From arp.c */
 30 externint sysctl_arp_res_time;
 31 externint sysctl_arp_dead_res_time;
 32 externint sysctl_arp_max_tries;
 33 externint sysctl_arp_timeout;
 34 externint sysctl_arp_check_interval;
 35 externint sysctl_arp_confirm_interval;
 36 externint sysctl_arp_confirm_timeout;
 37
 38 externint sysctl_tcp_cong_avoidance;
 39 externinttcp_sysctl_congavoid(ctl_table *ctl,int write,struct file * filp,
 40 void*buffer,size_t*lenp);
 41
 42 struct ipv4_config ipv4_config = {1,1,1,1, };
 43
 44 #ifdef CONFIG_SYSCTL
 45
 46 struct ipv4_config ipv4_def_router_config = {0,1,1,1,1,1,1, };
 47 struct ipv4_config ipv4_def_host_config = {1,1,1,1, };
 48
 49 intipv4_sysctl_forwarding(ctl_table *ctl,int write,struct file * filp,
 50 void*buffer,size_t*lenp)
 51 {
 52 int val = IS_ROUTER;
 53 int ret;
 54
 55  ret =proc_dointvec(ctl, write, filp, buffer, lenp);
 56
 57 if(write && IS_ROUTER != val) {
 58 if(IS_ROUTER)
 59  ipv4_config = ipv4_def_router_config;
 60 else
 61  ipv4_config = ipv4_def_host_config;
 62 rt_cache_flush(0);
 63 }
 64 return ret;
 65 }
 66
 67 ctl_table ipv4_table[] = {
 68 {NET_IPV4_ARP_RES_TIME,"arp_res_time",
 69 &sysctl_arp_res_time,sizeof(int),0644, NULL, &proc_dointvec},
 70 {NET_IPV4_ARP_DEAD_RES_TIME,"arp_dead_res_time",
 71 &sysctl_arp_dead_res_time,sizeof(int),0644, NULL, &proc_dointvec},
 72 {NET_IPV4_ARP_MAX_TRIES,"arp_max_tries",
 73 &sysctl_arp_max_tries,sizeof(int),0644, NULL, &proc_dointvec},
 74 {NET_IPV4_ARP_TIMEOUT,"arp_timeout",
 75 &sysctl_arp_timeout,sizeof(int),0644, NULL, &proc_dointvec},
 76 {NET_IPV4_ARP_CHECK_INTERVAL,"arp_check_interval",
 77 &sysctl_arp_check_interval,sizeof(int),0644, NULL, &proc_dointvec},
 78 {NET_IPV4_ARP_CONFIRM_INTERVAL,"arp_confirm_interval",
 79 &sysctl_arp_confirm_interval,sizeof(int),0644, NULL,
 80 &proc_dointvec},
 81 {NET_IPV4_ARP_CONFIRM_TIMEOUT,"arp_confirm_timeout",
 82 &sysctl_arp_confirm_timeout,sizeof(int),0644, NULL,
 83 &proc_dointvec},
 84 {NET_IPV4_TCP_VEGAS_CONG_AVOID,"tcp_vegas_cong_avoid",
 85 &sysctl_tcp_cong_avoidance,sizeof(int),0644,
 86  NULL, &tcp_sysctl_congavoid },
 87 {NET_IPV4_FORWARDING,"ip_forwarding",
 88 &ip_statistics.IpForwarding,sizeof(int),0644, NULL,
 89 &ipv4_sysctl_forwarding},
 90 {NET_IPV4_DEFAULT_TTL,"ip_default_ttl",
 91 &ip_statistics.IpDefaultTTL,sizeof(int),0644, NULL,
 92 &proc_dointvec},
 93 {NET_IPV4_RFC1812_FILTER,"ip_rfc1812_filter",
 94 &ipv4_config.rfc1812_filter,sizeof(int),0644, NULL,
 95 &proc_dointvec},
 96 {NET_IPV4_LOG_MARTIANS,"ip_log_martians",
 97 &ipv4_config.log_martians,sizeof(int),0644, NULL,
 98 &proc_dointvec},
 99 {NET_IPV4_SOURCE_ROUTE,"ip_source_route",
 100 &ipv4_config.source_route,sizeof(int),0644, NULL,
 101 &proc_dointvec},
 102 {NET_IPV4_ADDRMASK_AGENT,"ip_addrmask_agent",
 103 &ipv4_config.addrmask_agent,sizeof(int),0644, NULL,
 104 &proc_dointvec},
 105 {NET_IPV4_BOOTP_AGENT,"ip_bootp_agent",
 106 &ipv4_config.bootp_agent,sizeof(int),0644, NULL,
 107 &proc_dointvec},
 108 {NET_IPV4_BOOTP_RELAY,"ip_bootp_relay",
 109 &ipv4_config.bootp_relay,sizeof(int),0644, NULL,
 110 &proc_dointvec},
 111 {NET_IPV4_FIB_MODEL,"ip_fib_model",
 112 &ipv4_config.fib_model,sizeof(int),0644, NULL,
 113 &proc_dointvec},
 114 {NET_IPV4_NO_PMTU_DISC,"ip_no_pmtu_disc",
 115 &ipv4_config.no_pmtu_disc,sizeof(int),0644, NULL,
 116 &proc_dointvec},
 117 {NET_IPV4_ACCEPT_REDIRECTS,"ip_accept_redirects",
 118 &ipv4_config.accept_redirects,sizeof(int),0644, NULL,
 119 &proc_dointvec},
 120 {NET_IPV4_SECURE_REDIRECTS,"ip_secure_redirects",
 121 &ipv4_config.secure_redirects,sizeof(int),0644, NULL,
 122 &proc_dointvec},
 123 {NET_IPV4_RFC1620_REDIRECTS,"ip_rfc1620_redirects",
 124 &ipv4_config.rfc1620_redirects,sizeof(int),0644, NULL,
 125 &proc_dointvec},
 126 {0}
 127 };
 128
 129 #endif/* CONFIG_SYSCTL */