/* * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. * * $Id: sysctl_net_ipv4.c,v 1.38.2.2 1999/09/22 16:33:30 davem Exp $ * * Begun April 1, 1996, Mike Shaver. * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] */ #include #include #include #include #include #include #include /* * 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 icmp.c */ extern int sysctl_icmp_echo_ignore_all; extern int sysctl_icmp_echo_ignore_broadcasts; extern int sysctl_icmp_ignore_bogus_error_responses; /* From ip_fragment.c */ extern int sysctl_ipfrag_low_thresh; extern int sysctl_ipfrag_high_thresh; extern int sysctl_ipfrag_time; /* From ip_output.c */ extern int sysctl_ip_dynaddr; /* From ip_input.c */ extern int sysctl_ip_always_defrag; /* From ip_masq.c */ extern int sysctl_ip_masq_debug; extern int sysctl_tcp_timestamps; extern int sysctl_tcp_window_scaling; extern int sysctl_tcp_sack; extern int sysctl_tcp_retrans_collapse; 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_fin_timeout; extern int sysctl_tcp_syncookies; extern int sysctl_tcp_syn_retries; extern int sysctl_tcp_stdurg; extern int sysctl_tcp_rfc1337; extern int sysctl_tcp_syn_taildrop; extern int sysctl_max_syn_backlog; /* From icmp.c */ extern int sysctl_icmp_destunreach_time; extern int sysctl_icmp_timeexceed_time; extern int sysctl_icmp_paramprob_time; extern int sysctl_icmp_echoreply_time; /* From igmp.c */ extern int sysctl_igmp_max_memberships; int tcp_retr1_max = 255; struct ipv4_config ipv4_config; extern ctl_table ipv4_route_table[]; #ifdef CONFIG_SYSCTL static int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp, void *buffer, size_t *lenp) { int val = ipv4_devconf.forwarding; int ret; ret = proc_dointvec(ctl, write, filp, buffer, lenp); if (write && ipv4_devconf.forwarding != val) inet_forward_change(); return ret; } static int ipv4_sysctl_forward_strategy(ctl_table *table, int *name, int nlen, void *oldval, size_t *oldlenp, void *newval, size_t newlen, void **context) { int new; if (newlen != sizeof(int)) return -EINVAL; if (get_user(new,(int *)newval)) return -EFAULT; if (new != ipv4_devconf.forwarding) inet_forward_change(); return 0; /* caller does change again and handles handles oldval */ } ctl_table ipv4_table[] = { {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_SACK, "tcp_sack", &sysctl_tcp_sack, sizeof(int), 0644, NULL, &proc_dointvec}, {NET_IPV4_TCP_RETRANS_COLLAPSE, "tcp_retrans_collapse", &sysctl_tcp_retrans_collapse, sizeof(int), 0644, NULL, &proc_dointvec}, {NET_IPV4_FORWARD, "ip_forward", &ipv4_devconf.forwarding, sizeof(int), 0644, NULL, &ipv4_sysctl_forward,&ipv4_sysctl_forward_strategy}, {NET_IPV4_DEFAULT_TTL, "ip_default_ttl", &ip_statistics.IpDefaultTTL, sizeof(int), 0644, NULL, &proc_dointvec}, {NET_IPV4_AUTOCONFIG, "ip_autoconfig", &ipv4_config.autoconfig, 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_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_DYNADDR, "ip_dynaddr", &sysctl_ip_dynaddr, sizeof(int), 0644, NULL, &proc_dointvec}, {NET_IPV4_ALWAYS_DEFRAG, "ip_always_defrag", &sysctl_ip_always_defrag, sizeof(int), 0644, NULL, &proc_dointvec}, #ifdef CONFIG_IP_MASQUERADE {NET_IPV4_IP_MASQ_DEBUG, "ip_masq_debug", &sysctl_ip_masq_debug, sizeof(int), 0644, NULL, &proc_dointvec}, #endif {NET_IPV4_IPFRAG_TIME, "ipfrag_time", &sysctl_ipfrag_time, sizeof(int), 0644, NULL, &proc_dointvec_jiffies, &sysctl_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, &sysctl_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_FIN_TIMEOUT, "tcp_fin_timeout", &sysctl_tcp_fin_timeout, sizeof(int), 0644, NULL, &proc_dointvec_jiffies, &sysctl_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_RFC1337, "tcp_rfc1337", &sysctl_tcp_rfc1337, 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_IGNORE_BOGUS_ERROR_RESPONSES, "icmp_ignore_bogus_error_responses", &sysctl_icmp_ignore_bogus_error_responses, 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}, {NET_IPV4_ROUTE, "route", NULL, 0, 0555, ipv4_route_table}, #ifdef CONFIG_IP_MULTICAST {NET_IPV4_IGMP_MAX_MEMBERSHIPS, "igmp_max_memberships", &sysctl_igmp_max_memberships, sizeof(int), 0644, NULL, &proc_dointvec}, #endif {0} }; #endif /* CONFIG_SYSCTL */