11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Definitions for the IP module. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Version: @(#)ip.h 1.0.2 05/07/93 91da177e4SLinus Torvalds * 1002c30a84SJesper Juhl * Authors: Ross Biro 111da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 121da177e4SLinus Torvalds * Alan Cox, <gw4pts@gw4pts.ampr.org> 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * Changes: 151da177e4SLinus Torvalds * Mike McLagan : Routing by source 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 181da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 191da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 201da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds #ifndef _IP_H 231da177e4SLinus Torvalds #define _IP_H 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include <linux/config.h> 261da177e4SLinus Torvalds #include <linux/types.h> 271da177e4SLinus Torvalds #include <linux/ip.h> 281da177e4SLinus Torvalds #include <linux/in.h> 2914c85021SArnaldo Carvalho de Melo 3014c85021SArnaldo Carvalho de Melo #include <net/inet_sock.h> 311da177e4SLinus Torvalds #include <net/snmp.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds struct sock; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds struct inet_skb_parm 361da177e4SLinus Torvalds { 371da177e4SLinus Torvalds struct ip_options opt; /* Compiled IP options */ 381da177e4SLinus Torvalds unsigned char flags; 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #define IPSKB_MASQUERADED 1 411da177e4SLinus Torvalds #define IPSKB_TRANSLATED 2 421da177e4SLinus Torvalds #define IPSKB_FORWARDED 4 431da177e4SLinus Torvalds #define IPSKB_XFRM_TUNNEL_SIZE 8 4489cee8b1SHerbert Xu #define IPSKB_FRAG_COMPLETE 16 451da177e4SLinus Torvalds }; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds struct ipcm_cookie 481da177e4SLinus Torvalds { 491da177e4SLinus Torvalds u32 addr; 501da177e4SLinus Torvalds int oif; 511da177e4SLinus Torvalds struct ip_options *opt; 521da177e4SLinus Torvalds }; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds #define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb)) 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds struct ip_ra_chain 571da177e4SLinus Torvalds { 581da177e4SLinus Torvalds struct ip_ra_chain *next; 591da177e4SLinus Torvalds struct sock *sk; 601da177e4SLinus Torvalds void (*destructor)(struct sock *); 611da177e4SLinus Torvalds }; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds extern struct ip_ra_chain *ip_ra_chain; 641da177e4SLinus Torvalds extern rwlock_t ip_ra_lock; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds /* IP flags. */ 671da177e4SLinus Torvalds #define IP_CE 0x8000 /* Flag: "Congestion" */ 681da177e4SLinus Torvalds #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ 691da177e4SLinus Torvalds #define IP_MF 0x2000 /* Flag: "More Fragments" */ 701da177e4SLinus Torvalds #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ 731da177e4SLinus Torvalds 7414c85021SArnaldo Carvalho de Melo struct msghdr; 7514c85021SArnaldo Carvalho de Melo struct net_device; 7614c85021SArnaldo Carvalho de Melo struct packet_type; 7714c85021SArnaldo Carvalho de Melo struct rtable; 7814c85021SArnaldo Carvalho de Melo struct sk_buff; 7914c85021SArnaldo Carvalho de Melo struct sockaddr; 8014c85021SArnaldo Carvalho de Melo 811da177e4SLinus Torvalds extern void ip_mc_dropsocket(struct sock *); 821da177e4SLinus Torvalds extern void ip_mc_dropdevice(struct net_device *dev); 831da177e4SLinus Torvalds extern int igmp_mc_proc_init(void); 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* 861da177e4SLinus Torvalds * Functions provided by ip.c 871da177e4SLinus Torvalds */ 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk, 901da177e4SLinus Torvalds u32 saddr, u32 daddr, 911da177e4SLinus Torvalds struct ip_options *opt); 921da177e4SLinus Torvalds extern int ip_rcv(struct sk_buff *skb, struct net_device *dev, 93f2ccd8faSDavid S. Miller struct packet_type *pt, struct net_device *orig_dev); 941da177e4SLinus Torvalds extern int ip_local_deliver(struct sk_buff *skb); 951da177e4SLinus Torvalds extern int ip_mr_input(struct sk_buff *skb); 961da177e4SLinus Torvalds extern int ip_output(struct sk_buff *skb); 971da177e4SLinus Torvalds extern int ip_mc_output(struct sk_buff *skb); 981da177e4SLinus Torvalds extern int ip_fragment(struct sk_buff *skb, int (*out)(struct sk_buff*)); 991da177e4SLinus Torvalds extern int ip_do_nat(struct sk_buff *skb); 1001da177e4SLinus Torvalds extern void ip_send_check(struct iphdr *ip); 1011da177e4SLinus Torvalds extern int ip_queue_xmit(struct sk_buff *skb, int ipfragok); 1021da177e4SLinus Torvalds extern void ip_init(void); 1031da177e4SLinus Torvalds extern int ip_append_data(struct sock *sk, 1041da177e4SLinus Torvalds int getfrag(void *from, char *to, int offset, int len, 1051da177e4SLinus Torvalds int odd, struct sk_buff *skb), 1061da177e4SLinus Torvalds void *from, int len, int protolen, 1071da177e4SLinus Torvalds struct ipcm_cookie *ipc, 1081da177e4SLinus Torvalds struct rtable *rt, 1091da177e4SLinus Torvalds unsigned int flags); 1101da177e4SLinus Torvalds extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb); 1111da177e4SLinus Torvalds extern ssize_t ip_append_page(struct sock *sk, struct page *page, 1121da177e4SLinus Torvalds int offset, size_t size, int flags); 1131da177e4SLinus Torvalds extern int ip_push_pending_frames(struct sock *sk); 1141da177e4SLinus Torvalds extern void ip_flush_pending_frames(struct sock *sk); 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds /* datagram.c */ 1171da177e4SLinus Torvalds extern int ip4_datagram_connect(struct sock *sk, 1181da177e4SLinus Torvalds struct sockaddr *uaddr, int addr_len); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* 1211da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type Token Ring. 1221da177e4SLinus Torvalds * This conforms to RFC1469 Option 2 Multicasting i.e. 1231da177e4SLinus Torvalds * using a functional address to transmit / receive 1241da177e4SLinus Torvalds * multicast packets. 1251da177e4SLinus Torvalds */ 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds static inline void ip_tr_mc_map(u32 addr, char *buf) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds buf[0]=0xC0; 1301da177e4SLinus Torvalds buf[1]=0x00; 1311da177e4SLinus Torvalds buf[2]=0x00; 1321da177e4SLinus Torvalds buf[3]=0x04; 1331da177e4SLinus Torvalds buf[4]=0x00; 1341da177e4SLinus Torvalds buf[5]=0x00; 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds struct ip_reply_arg { 1381da177e4SLinus Torvalds struct kvec iov[1]; 1391da177e4SLinus Torvalds u32 csum; 1401da177e4SLinus Torvalds int csumoffset; /* u16 offset of csum in iov[0].iov_base */ 1411da177e4SLinus Torvalds /* -1 if not needed */ 1421da177e4SLinus Torvalds }; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, 1451da177e4SLinus Torvalds unsigned int len); 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds struct ipv4_config 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds int log_martians; 1501da177e4SLinus Torvalds int autoconfig; 1511da177e4SLinus Torvalds int no_pmtu_disc; 1521da177e4SLinus Torvalds }; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds extern struct ipv4_config ipv4_config; 1551da177e4SLinus Torvalds DECLARE_SNMP_STAT(struct ipstats_mib, ip_statistics); 1561da177e4SLinus Torvalds #define IP_INC_STATS(field) SNMP_INC_STATS(ip_statistics, field) 1571da177e4SLinus Torvalds #define IP_INC_STATS_BH(field) SNMP_INC_STATS_BH(ip_statistics, field) 1581da177e4SLinus Torvalds #define IP_INC_STATS_USER(field) SNMP_INC_STATS_USER(ip_statistics, field) 1591da177e4SLinus Torvalds DECLARE_SNMP_STAT(struct linux_mib, net_statistics); 1601da177e4SLinus Torvalds #define NET_INC_STATS(field) SNMP_INC_STATS(net_statistics, field) 1611da177e4SLinus Torvalds #define NET_INC_STATS_BH(field) SNMP_INC_STATS_BH(net_statistics, field) 1621da177e4SLinus Torvalds #define NET_INC_STATS_USER(field) SNMP_INC_STATS_USER(net_statistics, field) 1631da177e4SLinus Torvalds #define NET_ADD_STATS_BH(field, adnd) SNMP_ADD_STATS_BH(net_statistics, field, adnd) 1641da177e4SLinus Torvalds #define NET_ADD_STATS_USER(field, adnd) SNMP_ADD_STATS_USER(net_statistics, field, adnd) 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds extern int sysctl_local_port_range[2]; 1671da177e4SLinus Torvalds extern int sysctl_ip_default_ttl; 168cdac4e07SNeil Horman extern int sysctl_ip_nonlocal_bind; 1691da177e4SLinus Torvalds 17020380731SArnaldo Carvalho de Melo /* From ip_fragment.c */ 17120380731SArnaldo Carvalho de Melo extern int sysctl_ipfrag_high_thresh; 17220380731SArnaldo Carvalho de Melo extern int sysctl_ipfrag_low_thresh; 17320380731SArnaldo Carvalho de Melo extern int sysctl_ipfrag_time; 17420380731SArnaldo Carvalho de Melo extern int sysctl_ipfrag_secret_interval; 17589cee8b1SHerbert Xu extern int sysctl_ipfrag_max_dist; 17620380731SArnaldo Carvalho de Melo 17720380731SArnaldo Carvalho de Melo /* From inetpeer.c */ 17820380731SArnaldo Carvalho de Melo extern int inet_peer_threshold; 17920380731SArnaldo Carvalho de Melo extern int inet_peer_minttl; 18020380731SArnaldo Carvalho de Melo extern int inet_peer_maxttl; 18120380731SArnaldo Carvalho de Melo extern int inet_peer_gc_mintime; 18220380731SArnaldo Carvalho de Melo extern int inet_peer_gc_maxtime; 18320380731SArnaldo Carvalho de Melo 18420380731SArnaldo Carvalho de Melo /* From ip_output.c */ 18520380731SArnaldo Carvalho de Melo extern int sysctl_ip_dynaddr; 18620380731SArnaldo Carvalho de Melo 18720380731SArnaldo Carvalho de Melo extern void ipfrag_init(void); 18820380731SArnaldo Carvalho de Melo 1891da177e4SLinus Torvalds #ifdef CONFIG_INET 19014c85021SArnaldo Carvalho de Melo #include <net/dst.h> 19114c85021SArnaldo Carvalho de Melo 1921da177e4SLinus Torvalds /* The function in 2.2 was invalid, producing wrong result for 1931da177e4SLinus Torvalds * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */ 1941da177e4SLinus Torvalds static inline 1951da177e4SLinus Torvalds int ip_decrease_ttl(struct iphdr *iph) 1961da177e4SLinus Torvalds { 1971da177e4SLinus Torvalds u32 check = iph->check; 1981da177e4SLinus Torvalds check += htons(0x0100); 1991da177e4SLinus Torvalds iph->check = check + (check>=0xFFFF); 2001da177e4SLinus Torvalds return --iph->ttl; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds static inline 2041da177e4SLinus Torvalds int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds return (inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || 2071da177e4SLinus Torvalds (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && 2081da177e4SLinus Torvalds !(dst_metric(dst, RTAX_LOCK)&(1<<RTAX_MTU)))); 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more); 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk) 2141da177e4SLinus Torvalds { 2151da177e4SLinus Torvalds if (iph->frag_off & htons(IP_DF)) { 2161da177e4SLinus Torvalds /* This is only to work around buggy Windows95/2000 2171da177e4SLinus Torvalds * VJ compression implementations. If the ID field 2181da177e4SLinus Torvalds * does not change, they drop every other packet in 2191da177e4SLinus Torvalds * a TCP stream using header compression. 2201da177e4SLinus Torvalds */ 2211da177e4SLinus Torvalds iph->id = (sk && inet_sk(sk)->daddr) ? 2221da177e4SLinus Torvalds htons(inet_sk(sk)->id++) : 0; 2231da177e4SLinus Torvalds } else 2241da177e4SLinus Torvalds __ip_select_ident(iph, dst, 0); 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more) 2281da177e4SLinus Torvalds { 2291da177e4SLinus Torvalds if (iph->frag_off & htons(IP_DF)) { 2301da177e4SLinus Torvalds if (sk && inet_sk(sk)->daddr) { 2311da177e4SLinus Torvalds iph->id = htons(inet_sk(sk)->id); 2321da177e4SLinus Torvalds inet_sk(sk)->id += 1 + more; 2331da177e4SLinus Torvalds } else 2341da177e4SLinus Torvalds iph->id = 0; 2351da177e4SLinus Torvalds } else 2361da177e4SLinus Torvalds __ip_select_ident(iph, dst, more); 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds /* 2401da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type ethernet. 2411da177e4SLinus Torvalds */ 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds static inline void ip_eth_mc_map(u32 addr, char *buf) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds addr=ntohl(addr); 2461da177e4SLinus Torvalds buf[0]=0x01; 2471da177e4SLinus Torvalds buf[1]=0x00; 2481da177e4SLinus Torvalds buf[2]=0x5e; 2491da177e4SLinus Torvalds buf[5]=addr&0xFF; 2501da177e4SLinus Torvalds addr>>=8; 2511da177e4SLinus Torvalds buf[4]=addr&0xFF; 2521da177e4SLinus Torvalds addr>>=8; 2531da177e4SLinus Torvalds buf[3]=addr&0x7F; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* 2571da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand. 2581da177e4SLinus Torvalds * Leave P_Key as 0 to be filled in by driver. 2591da177e4SLinus Torvalds */ 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds static inline void ip_ib_mc_map(u32 addr, char *buf) 2621da177e4SLinus Torvalds { 2631da177e4SLinus Torvalds buf[0] = 0; /* Reserved */ 2641da177e4SLinus Torvalds buf[1] = 0xff; /* Multicast QPN */ 2651da177e4SLinus Torvalds buf[2] = 0xff; 2661da177e4SLinus Torvalds buf[3] = 0xff; 2671da177e4SLinus Torvalds addr = ntohl(addr); 2681da177e4SLinus Torvalds buf[4] = 0xff; 2691da177e4SLinus Torvalds buf[5] = 0x12; /* link local scope */ 2701da177e4SLinus Torvalds buf[6] = 0x40; /* IPv4 signature */ 2711da177e4SLinus Torvalds buf[7] = 0x1b; 2721da177e4SLinus Torvalds buf[8] = 0; /* P_Key */ 2731da177e4SLinus Torvalds buf[9] = 0; 2741da177e4SLinus Torvalds buf[10] = 0; 2751da177e4SLinus Torvalds buf[11] = 0; 2761da177e4SLinus Torvalds buf[12] = 0; 2771da177e4SLinus Torvalds buf[13] = 0; 2781da177e4SLinus Torvalds buf[14] = 0; 2791da177e4SLinus Torvalds buf[15] = 0; 2801da177e4SLinus Torvalds buf[19] = addr & 0xff; 2811da177e4SLinus Torvalds addr >>= 8; 2821da177e4SLinus Torvalds buf[18] = addr & 0xff; 2831da177e4SLinus Torvalds addr >>= 8; 2841da177e4SLinus Torvalds buf[17] = addr & 0xff; 2851da177e4SLinus Torvalds addr >>= 8; 2861da177e4SLinus Torvalds buf[16] = addr & 0x0f; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2901da177e4SLinus Torvalds #include <linux/ipv6.h> 2911da177e4SLinus Torvalds #endif 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds static __inline__ void inet_reset_saddr(struct sock *sk) 2941da177e4SLinus Torvalds { 2951da177e4SLinus Torvalds inet_sk(sk)->rcv_saddr = inet_sk(sk)->saddr = 0; 2961da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2971da177e4SLinus Torvalds if (sk->sk_family == PF_INET6) { 2981da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds memset(&np->saddr, 0, sizeof(np->saddr)); 3011da177e4SLinus Torvalds memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr)); 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds #endif 3041da177e4SLinus Torvalds } 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds #endif 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds extern int ip_call_ra_chain(struct sk_buff *skb); 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds /* 3111da177e4SLinus Torvalds * Functions provided by ip_fragment.o 3121da177e4SLinus Torvalds */ 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds enum ip_defrag_users 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds IP_DEFRAG_LOCAL_DELIVER, 3171da177e4SLinus Torvalds IP_DEFRAG_CALL_RA_CHAIN, 3181da177e4SLinus Torvalds IP_DEFRAG_CONNTRACK_IN, 3191da177e4SLinus Torvalds IP_DEFRAG_CONNTRACK_OUT, 3201da177e4SLinus Torvalds IP_DEFRAG_NAT_OUT, 3211da177e4SLinus Torvalds IP_DEFRAG_VS_IN, 3221da177e4SLinus Torvalds IP_DEFRAG_VS_OUT, 3231da177e4SLinus Torvalds IP_DEFRAG_VS_FWD 3241da177e4SLinus Torvalds }; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds struct sk_buff *ip_defrag(struct sk_buff *skb, u32 user); 3271da177e4SLinus Torvalds extern int ip_frag_nqueues; 3281da177e4SLinus Torvalds extern atomic_t ip_frag_mem; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds /* 3311da177e4SLinus Torvalds * Functions provided by ip_forward.c 3321da177e4SLinus Torvalds */ 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds extern int ip_forward(struct sk_buff *skb); 3351da177e4SLinus Torvalds extern int ip_net_unreachable(struct sk_buff *skb); 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds /* 3381da177e4SLinus Torvalds * Functions provided by ip_options.c 3391da177e4SLinus Torvalds */ 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, u32 daddr, struct rtable *rt, int is_frag); 3421da177e4SLinus Torvalds extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb); 3431da177e4SLinus Torvalds extern void ip_options_fragment(struct sk_buff *skb); 3441da177e4SLinus Torvalds extern int ip_options_compile(struct ip_options *opt, struct sk_buff *skb); 3454c6ea29dSArnaldo Carvalho de Melo extern int ip_options_get(struct ip_options **optp, 3464c6ea29dSArnaldo Carvalho de Melo unsigned char *data, int optlen); 3474c6ea29dSArnaldo Carvalho de Melo extern int ip_options_get_from_user(struct ip_options **optp, 3484c6ea29dSArnaldo Carvalho de Melo unsigned char __user *data, int optlen); 3491da177e4SLinus Torvalds extern void ip_options_undo(struct ip_options * opt); 3501da177e4SLinus Torvalds extern void ip_forward_options(struct sk_buff *skb); 3511da177e4SLinus Torvalds extern int ip_options_rcv_srr(struct sk_buff *skb); 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds /* 3541da177e4SLinus Torvalds * Functions provided by ip_sockglue.c 3551da177e4SLinus Torvalds */ 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb); 3581da177e4SLinus Torvalds extern int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc); 3591da177e4SLinus Torvalds extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen); 3601da177e4SLinus Torvalds extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen); 3611da177e4SLinus Torvalds extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len); 3641da177e4SLinus Torvalds extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 3651da177e4SLinus Torvalds u16 port, u32 info, u8 *payload); 3661da177e4SLinus Torvalds extern void ip_local_error(struct sock *sk, int err, u32 daddr, u16 dport, 3671da177e4SLinus Torvalds u32 info); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* sysctl helpers - any sysctl which holds a value that ends up being 3701da177e4SLinus Torvalds * fed into the routing cache should use these handlers. 3711da177e4SLinus Torvalds */ 3721da177e4SLinus Torvalds int ipv4_doint_and_flush(ctl_table *ctl, int write, 3731da177e4SLinus Torvalds struct file* filp, void __user *buffer, 3741da177e4SLinus Torvalds size_t *lenp, loff_t *ppos); 3751da177e4SLinus Torvalds int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen, 3761da177e4SLinus Torvalds void __user *oldval, size_t __user *oldlenp, 3771da177e4SLinus Torvalds void __user *newval, size_t newlen, 3781da177e4SLinus Torvalds void **context); 37920380731SArnaldo Carvalho de Melo #ifdef CONFIG_PROC_FS 38020380731SArnaldo Carvalho de Melo extern int ip_misc_proc_init(void); 38120380731SArnaldo Carvalho de Melo #endif 38220380731SArnaldo Carvalho de Melo 38320380731SArnaldo Carvalho de Melo extern struct ctl_table ipv4_table[]; 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds #endif /* _IP_H */ 386