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/types.h> 261da177e4SLinus Torvalds #include <linux/ip.h> 271da177e4SLinus Torvalds #include <linux/in.h> 28c9bdd4b5SArnaldo Carvalho de Melo #include <linux/skbuff.h> 2914c85021SArnaldo Carvalho de Melo 3014c85021SArnaldo Carvalho de Melo #include <net/inet_sock.h> 311da177e4SLinus Torvalds #include <net/snmp.h> 3286b08d86SKOVACS Krisztian #include <net/flow.h> 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds struct sock; 351da177e4SLinus Torvalds 36fd2c3ef7SEric Dumazet struct inet_skb_parm { 371da177e4SLinus Torvalds struct ip_options opt; /* Compiled IP options */ 381da177e4SLinus Torvalds unsigned char flags; 391da177e4SLinus Torvalds 408cdfab8aSPatrick McHardy #define IPSKB_FORWARDED 1 418cdfab8aSPatrick McHardy #define IPSKB_XFRM_TUNNEL_SIZE 2 423e3850e9SPatrick McHardy #define IPSKB_XFRM_TRANSFORMED 4 433e3850e9SPatrick McHardy #define IPSKB_FRAG_COMPLETE 8 4448d5cad8SPatrick McHardy #define IPSKB_REROUTED 16 451da177e4SLinus Torvalds }; 461da177e4SLinus Torvalds 47c9bdd4b5SArnaldo Carvalho de Melo static inline unsigned int ip_hdrlen(const struct sk_buff *skb) 48c9bdd4b5SArnaldo Carvalho de Melo { 49eddc9ec5SArnaldo Carvalho de Melo return ip_hdr(skb)->ihl * 4; 50c9bdd4b5SArnaldo Carvalho de Melo } 51c9bdd4b5SArnaldo Carvalho de Melo 52fd2c3ef7SEric Dumazet struct ipcm_cookie { 53c1d18f9fSAl Viro __be32 addr; 541da177e4SLinus Torvalds int oif; 551da177e4SLinus Torvalds struct ip_options *opt; 5651f31cabSPatrick Ohly union skb_shared_tx shtx; 571da177e4SLinus Torvalds }; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds #define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb)) 601da177e4SLinus Torvalds 61fd2c3ef7SEric Dumazet struct ip_ra_chain { 621da177e4SLinus Torvalds struct ip_ra_chain *next; 631da177e4SLinus Torvalds struct sock *sk; 641da177e4SLinus Torvalds void (*destructor)(struct sock *); 651da177e4SLinus Torvalds }; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds extern struct ip_ra_chain *ip_ra_chain; 681da177e4SLinus Torvalds extern rwlock_t ip_ra_lock; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* IP flags. */ 711da177e4SLinus Torvalds #define IP_CE 0x8000 /* Flag: "Congestion" */ 721da177e4SLinus Torvalds #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ 731da177e4SLinus Torvalds #define IP_MF 0x2000 /* Flag: "More Fragments" */ 741da177e4SLinus Torvalds #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ 771da177e4SLinus Torvalds 7814c85021SArnaldo Carvalho de Melo struct msghdr; 7914c85021SArnaldo Carvalho de Melo struct net_device; 8014c85021SArnaldo Carvalho de Melo struct packet_type; 8114c85021SArnaldo Carvalho de Melo struct rtable; 8214c85021SArnaldo Carvalho de Melo struct sockaddr; 8314c85021SArnaldo Carvalho de Melo 841da177e4SLinus Torvalds extern int igmp_mc_proc_init(void); 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* 871da177e4SLinus Torvalds * Functions provided by ip.c 881da177e4SLinus Torvalds */ 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk, 9113d8eaa0SAl Viro __be32 saddr, __be32 daddr, 921da177e4SLinus Torvalds struct ip_options *opt); 931da177e4SLinus Torvalds extern int ip_rcv(struct sk_buff *skb, struct net_device *dev, 94f2ccd8faSDavid S. Miller struct packet_type *pt, struct net_device *orig_dev); 951da177e4SLinus Torvalds extern int ip_local_deliver(struct sk_buff *skb); 961da177e4SLinus Torvalds extern int ip_mr_input(struct sk_buff *skb); 971da177e4SLinus Torvalds extern int ip_output(struct sk_buff *skb); 981da177e4SLinus Torvalds extern int ip_mc_output(struct sk_buff *skb); 992e2f7aefSPatrick McHardy extern int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); 1001da177e4SLinus Torvalds extern int ip_do_nat(struct sk_buff *skb); 1011da177e4SLinus Torvalds extern void ip_send_check(struct iphdr *ip); 102c439cb2eSHerbert Xu extern int __ip_local_out(struct sk_buff *skb); 103c439cb2eSHerbert Xu extern int ip_local_out(struct sk_buff *skb); 104e89862f4SDavid S. Miller extern int ip_queue_xmit(struct sk_buff *skb, int ipfragok); 1051da177e4SLinus Torvalds extern void ip_init(void); 1061da177e4SLinus Torvalds extern int ip_append_data(struct sock *sk, 1071da177e4SLinus Torvalds int getfrag(void *from, char *to, int offset, int len, 1081da177e4SLinus Torvalds int odd, struct sk_buff *skb), 1091da177e4SLinus Torvalds void *from, int len, int protolen, 1101da177e4SLinus Torvalds struct ipcm_cookie *ipc, 1112e77d89bSEric Dumazet struct rtable **rt, 1121da177e4SLinus Torvalds unsigned int flags); 1131da177e4SLinus Torvalds extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb); 1141da177e4SLinus Torvalds extern ssize_t ip_append_page(struct sock *sk, struct page *page, 1151da177e4SLinus Torvalds int offset, size_t size, int flags); 1161da177e4SLinus Torvalds extern int ip_push_pending_frames(struct sock *sk); 1171da177e4SLinus Torvalds extern void ip_flush_pending_frames(struct sock *sk); 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* datagram.c */ 1201da177e4SLinus Torvalds extern int ip4_datagram_connect(struct sock *sk, 1211da177e4SLinus Torvalds struct sockaddr *uaddr, int addr_len); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* 1241da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type Token Ring. 1251da177e4SLinus Torvalds * This conforms to RFC1469 Option 2 Multicasting i.e. 1261da177e4SLinus Torvalds * using a functional address to transmit / receive 1271da177e4SLinus Torvalds * multicast packets. 1281da177e4SLinus Torvalds */ 1291da177e4SLinus Torvalds 130714e85beSAl Viro static inline void ip_tr_mc_map(__be32 addr, char *buf) 1311da177e4SLinus Torvalds { 1321da177e4SLinus Torvalds buf[0]=0xC0; 1331da177e4SLinus Torvalds buf[1]=0x00; 1341da177e4SLinus Torvalds buf[2]=0x00; 1351da177e4SLinus Torvalds buf[3]=0x04; 1361da177e4SLinus Torvalds buf[4]=0x00; 1371da177e4SLinus Torvalds buf[5]=0x00; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds struct ip_reply_arg { 1411da177e4SLinus Torvalds struct kvec iov[1]; 14288ef4a5aSKOVACS Krisztian int flags; 143d6f5493cSAl Viro __wsum csum; 1441da177e4SLinus Torvalds int csumoffset; /* u16 offset of csum in iov[0].iov_base */ 1451da177e4SLinus Torvalds /* -1 if not needed */ 146f0e48dbfSPatrick McHardy int bound_dev_if; 1471da177e4SLinus Torvalds }; 1481da177e4SLinus Torvalds 14988ef4a5aSKOVACS Krisztian #define IP_REPLY_ARG_NOSRCCHECK 1 15088ef4a5aSKOVACS Krisztian 15186b08d86SKOVACS Krisztian static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg) 15286b08d86SKOVACS Krisztian { 15386b08d86SKOVACS Krisztian return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0; 15486b08d86SKOVACS Krisztian } 15586b08d86SKOVACS Krisztian 1561da177e4SLinus Torvalds void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, 1571da177e4SLinus Torvalds unsigned int len); 1581da177e4SLinus Torvalds 159fd2c3ef7SEric Dumazet struct ipv4_config { 1601da177e4SLinus Torvalds int log_martians; 1611da177e4SLinus Torvalds int no_pmtu_disc; 1621da177e4SLinus Torvalds }; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds extern struct ipv4_config ipv4_config; 165a20f5799SPavel Emelyanov #define IP_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.ip_statistics, field) 166a20f5799SPavel Emelyanov #define IP_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.ip_statistics, field) 167edf391ffSNeil Horman #define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.ip_statistics, field, val) 168a20f5799SPavel Emelyanov #define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS_BH((net)->mib.ip_statistics, field, val) 169edf391ffSNeil Horman #define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS((net)->mib.ip_statistics, field, val) 170edf391ffSNeil Horman #define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS_BH((net)->mib.ip_statistics, field, val) 17161a7e260SPavel Emelyanov #define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field) 17261a7e260SPavel Emelyanov #define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field) 17361a7e260SPavel Emelyanov #define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field) 17461a7e260SPavel Emelyanov #define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd) 17561a7e260SPavel Emelyanov #define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd) 1761da177e4SLinus Torvalds 1775e0f0435SHerbert Xu extern unsigned long snmp_fold_field(void *mib[], int offt); 178c69bce20SYOSHIFUJI Hideaki extern int snmp_mib_init(void *ptr[2], size_t mibsize); 17933490170SYOSHIFUJI Hideaki extern void snmp_mib_free(void *ptr[2]); 18033490170SYOSHIFUJI Hideaki 1813c689b73SEric Dumazet extern struct local_ports { 1823c689b73SEric Dumazet seqlock_t lock; 1833c689b73SEric Dumazet int range[2]; 1843c689b73SEric Dumazet } sysctl_local_ports; 185227b60f5SStephen Hemminger extern void inet_get_local_port_range(int *low, int *high); 186227b60f5SStephen Hemminger 1871da177e4SLinus Torvalds extern int sysctl_ip_default_ttl; 188cdac4e07SNeil Horman extern int sysctl_ip_nonlocal_bind; 1891da177e4SLinus Torvalds 190b27aeadbSAlexey Dobriyan extern struct ctl_path net_core_path[]; 1913d7cc2baSPavel Emelyanov extern struct ctl_path net_ipv4_ctl_path[]; 1923d7cc2baSPavel Emelyanov 19320380731SArnaldo Carvalho de Melo /* From inetpeer.c */ 19420380731SArnaldo Carvalho de Melo extern int inet_peer_threshold; 19520380731SArnaldo Carvalho de Melo extern int inet_peer_minttl; 19620380731SArnaldo Carvalho de Melo extern int inet_peer_maxttl; 19720380731SArnaldo Carvalho de Melo extern int inet_peer_gc_mintime; 19820380731SArnaldo Carvalho de Melo extern int inet_peer_gc_maxtime; 19920380731SArnaldo Carvalho de Melo 20020380731SArnaldo Carvalho de Melo /* From ip_output.c */ 20120380731SArnaldo Carvalho de Melo extern int sysctl_ip_dynaddr; 20220380731SArnaldo Carvalho de Melo 20320380731SArnaldo Carvalho de Melo extern void ipfrag_init(void); 20420380731SArnaldo Carvalho de Melo 205bd7b1533SAl Viro extern void ip_static_sysctl_init(void); 206bd7b1533SAl Viro 2071da177e4SLinus Torvalds #ifdef CONFIG_INET 20814c85021SArnaldo Carvalho de Melo #include <net/dst.h> 20914c85021SArnaldo Carvalho de Melo 2101da177e4SLinus Torvalds /* The function in 2.2 was invalid, producing wrong result for 2111da177e4SLinus Torvalds * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */ 2121da177e4SLinus Torvalds static inline 2131da177e4SLinus Torvalds int ip_decrease_ttl(struct iphdr *iph) 2141da177e4SLinus Torvalds { 2155c78f275SAl Viro u32 check = (__force u32)iph->check; 2165c78f275SAl Viro check += (__force u32)htons(0x0100); 2175c78f275SAl Viro iph->check = (__force __sum16)(check + (check>=0xFFFF)); 2181da177e4SLinus Torvalds return --iph->ttl; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static inline 2221da177e4SLinus Torvalds int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds return (inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || 2251da177e4SLinus Torvalds (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && 2260bbeafd0SSatoru SATOH !(dst_metric_locked(dst, RTAX_MTU)))); 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more); 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk) 2321da177e4SLinus Torvalds { 2331da177e4SLinus Torvalds if (iph->frag_off & htons(IP_DF)) { 2341da177e4SLinus Torvalds /* This is only to work around buggy Windows95/2000 2351da177e4SLinus Torvalds * VJ compression implementations. If the ID field 2361da177e4SLinus Torvalds * does not change, they drop every other packet in 2371da177e4SLinus Torvalds * a TCP stream using header compression. 2381da177e4SLinus Torvalds */ 239c720c7e8SEric Dumazet iph->id = (sk && inet_sk(sk)->inet_daddr) ? 240c720c7e8SEric Dumazet htons(inet_sk(sk)->inet_id++) : 0; 2411da177e4SLinus Torvalds } else 2421da177e4SLinus Torvalds __ip_select_ident(iph, dst, 0); 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more) 2461da177e4SLinus Torvalds { 2471da177e4SLinus Torvalds if (iph->frag_off & htons(IP_DF)) { 248c720c7e8SEric Dumazet if (sk && inet_sk(sk)->inet_daddr) { 249c720c7e8SEric Dumazet iph->id = htons(inet_sk(sk)->inet_id); 250c720c7e8SEric Dumazet inet_sk(sk)->inet_id += 1 + more; 2511da177e4SLinus Torvalds } else 2521da177e4SLinus Torvalds iph->id = 0; 2531da177e4SLinus Torvalds } else 2541da177e4SLinus Torvalds __ip_select_ident(iph, dst, more); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds /* 2581da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type ethernet. 2591da177e4SLinus Torvalds */ 2601da177e4SLinus Torvalds 261714e85beSAl Viro static inline void ip_eth_mc_map(__be32 naddr, char *buf) 2621da177e4SLinus Torvalds { 263714e85beSAl Viro __u32 addr=ntohl(naddr); 2641da177e4SLinus Torvalds buf[0]=0x01; 2651da177e4SLinus Torvalds buf[1]=0x00; 2661da177e4SLinus Torvalds buf[2]=0x5e; 2671da177e4SLinus Torvalds buf[5]=addr&0xFF; 2681da177e4SLinus Torvalds addr>>=8; 2691da177e4SLinus Torvalds buf[4]=addr&0xFF; 2701da177e4SLinus Torvalds addr>>=8; 2711da177e4SLinus Torvalds buf[3]=addr&0x7F; 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds /* 2751da177e4SLinus Torvalds * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand. 2761da177e4SLinus Torvalds * Leave P_Key as 0 to be filled in by driver. 2771da177e4SLinus Torvalds */ 2781da177e4SLinus Torvalds 279a9e527e3SRolf Manderscheid static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) 2801da177e4SLinus Torvalds { 281714e85beSAl Viro __u32 addr; 282a9e527e3SRolf Manderscheid unsigned char scope = broadcast[5] & 0xF; 283a9e527e3SRolf Manderscheid 2841da177e4SLinus Torvalds buf[0] = 0; /* Reserved */ 2851da177e4SLinus Torvalds buf[1] = 0xff; /* Multicast QPN */ 2861da177e4SLinus Torvalds buf[2] = 0xff; 2871da177e4SLinus Torvalds buf[3] = 0xff; 288714e85beSAl Viro addr = ntohl(naddr); 2891da177e4SLinus Torvalds buf[4] = 0xff; 290a9e527e3SRolf Manderscheid buf[5] = 0x10 | scope; /* scope from broadcast address */ 2911da177e4SLinus Torvalds buf[6] = 0x40; /* IPv4 signature */ 2921da177e4SLinus Torvalds buf[7] = 0x1b; 293a9e527e3SRolf Manderscheid buf[8] = broadcast[8]; /* P_Key */ 294a9e527e3SRolf Manderscheid buf[9] = broadcast[9]; 2951da177e4SLinus Torvalds buf[10] = 0; 2961da177e4SLinus Torvalds buf[11] = 0; 2971da177e4SLinus Torvalds buf[12] = 0; 2981da177e4SLinus Torvalds buf[13] = 0; 2991da177e4SLinus Torvalds buf[14] = 0; 3001da177e4SLinus Torvalds buf[15] = 0; 3011da177e4SLinus Torvalds buf[19] = addr & 0xff; 3021da177e4SLinus Torvalds addr >>= 8; 3031da177e4SLinus Torvalds buf[18] = addr & 0xff; 3041da177e4SLinus Torvalds addr >>= 8; 3051da177e4SLinus Torvalds buf[17] = addr & 0xff; 3061da177e4SLinus Torvalds addr >>= 8; 3071da177e4SLinus Torvalds buf[16] = addr & 0x0f; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 3111da177e4SLinus Torvalds #include <linux/ipv6.h> 3121da177e4SLinus Torvalds #endif 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static __inline__ void inet_reset_saddr(struct sock *sk) 3151da177e4SLinus Torvalds { 316c720c7e8SEric Dumazet inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0; 3171da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 3181da177e4SLinus Torvalds if (sk->sk_family == PF_INET6) { 3191da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds memset(&np->saddr, 0, sizeof(np->saddr)); 3221da177e4SLinus Torvalds memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr)); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds #endif 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds #endif 3281da177e4SLinus Torvalds 3297ad6848cSOctavian Purdila static inline int sk_mc_loop(struct sock *sk) 3307ad6848cSOctavian Purdila { 3317ad6848cSOctavian Purdila if (!sk) 3327ad6848cSOctavian Purdila return 1; 3337ad6848cSOctavian Purdila switch (sk->sk_family) { 3347ad6848cSOctavian Purdila case AF_INET: 3357ad6848cSOctavian Purdila return inet_sk(sk)->mc_loop; 3367ad6848cSOctavian Purdila #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 3377ad6848cSOctavian Purdila case AF_INET6: 3387ad6848cSOctavian Purdila return inet6_sk(sk)->mc_loop; 3397ad6848cSOctavian Purdila #endif 3407ad6848cSOctavian Purdila } 341cd65c3c7SOctavian Purdila WARN_ON(1); 3427ad6848cSOctavian Purdila return 1; 3437ad6848cSOctavian Purdila } 3447ad6848cSOctavian Purdila 3451da177e4SLinus Torvalds extern int ip_call_ra_chain(struct sk_buff *skb); 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds /* 348b798232fSRami Rosen * Functions provided by ip_fragment.c 3491da177e4SLinus Torvalds */ 3501da177e4SLinus Torvalds 351fd2c3ef7SEric Dumazet enum ip_defrag_users { 3521da177e4SLinus Torvalds IP_DEFRAG_LOCAL_DELIVER, 3531da177e4SLinus Torvalds IP_DEFRAG_CALL_RA_CHAIN, 3541da177e4SLinus Torvalds IP_DEFRAG_CONNTRACK_IN, 355*5d0aa2ccSPatrick McHardy __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHORT_MAX, 3561da177e4SLinus Torvalds IP_DEFRAG_CONNTRACK_OUT, 357*5d0aa2ccSPatrick McHardy __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHORT_MAX, 3588fa9ff68SPatrick McHardy IP_DEFRAG_CONNTRACK_BRIDGE_IN, 359*5d0aa2ccSPatrick McHardy __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHORT_MAX, 3601da177e4SLinus Torvalds IP_DEFRAG_VS_IN, 3611da177e4SLinus Torvalds IP_DEFRAG_VS_OUT, 3621da177e4SLinus Torvalds IP_DEFRAG_VS_FWD 3631da177e4SLinus Torvalds }; 3641da177e4SLinus Torvalds 365776c729eSHerbert Xu int ip_defrag(struct sk_buff *skb, u32 user); 3666ddc0822SPavel Emelyanov int ip_frag_mem(struct net *net); 367e5a2bb84SPavel Emelyanov int ip_frag_nqueues(struct net *net); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* 3701da177e4SLinus Torvalds * Functions provided by ip_forward.c 3711da177e4SLinus Torvalds */ 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds extern int ip_forward(struct sk_buff *skb); 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds /* 3761da177e4SLinus Torvalds * Functions provided by ip_options.c 3771da177e4SLinus Torvalds */ 3781da177e4SLinus Torvalds 3798712f774SAl Viro extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, __be32 daddr, struct rtable *rt, int is_frag); 3801da177e4SLinus Torvalds extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb); 3811da177e4SLinus Torvalds extern void ip_options_fragment(struct sk_buff *skb); 3820e6bd4a1SDenis V. Lunev extern int ip_options_compile(struct net *net, 3830e6bd4a1SDenis V. Lunev struct ip_options *opt, struct sk_buff *skb); 384f2c4802bSDenis V. Lunev extern int ip_options_get(struct net *net, struct ip_options **optp, 3854c6ea29dSArnaldo Carvalho de Melo unsigned char *data, int optlen); 386f2c4802bSDenis V. Lunev extern int ip_options_get_from_user(struct net *net, struct ip_options **optp, 3874c6ea29dSArnaldo Carvalho de Melo unsigned char __user *data, int optlen); 3881da177e4SLinus Torvalds extern void ip_options_undo(struct ip_options * opt); 3891da177e4SLinus Torvalds extern void ip_forward_options(struct sk_buff *skb); 3901da177e4SLinus Torvalds extern int ip_options_rcv_srr(struct sk_buff *skb); 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* 3931da177e4SLinus Torvalds * Functions provided by ip_sockglue.c 3941da177e4SLinus Torvalds */ 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb); 3977a6adb92SDenis V. Lunev extern int ip_cmsg_send(struct net *net, 3987a6adb92SDenis V. Lunev struct msghdr *msg, struct ipcm_cookie *ipc); 399b7058842SDavid S. Miller extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen); 4001da177e4SLinus Torvalds extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen); 4013fdadf7dSDmitry Mishin extern int compat_ip_setsockopt(struct sock *sk, int level, 402b7058842SDavid S. Miller int optname, char __user *optval, unsigned int optlen); 4033fdadf7dSDmitry Mishin extern int compat_ip_getsockopt(struct sock *sk, int level, 4043fdadf7dSDmitry Mishin int optname, char __user *optval, int __user *optlen); 4051da177e4SLinus Torvalds extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)); 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len); 4081da177e4SLinus Torvalds extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 40935986b32SAl Viro __be16 port, u32 info, u8 *payload); 4100579016eSAl Viro extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport, 4111da177e4SLinus Torvalds u32 info); 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds /* sysctl helpers - any sysctl which holds a value that ends up being 4141da177e4SLinus Torvalds * fed into the routing cache should use these handlers. 4151da177e4SLinus Torvalds */ 4161da177e4SLinus Torvalds int ipv4_doint_and_flush(ctl_table *ctl, int write, 4178d65af78SAlexey Dobriyan void __user *buffer, 4181da177e4SLinus Torvalds size_t *lenp, loff_t *ppos); 419f221e726SAlexey Dobriyan int ipv4_doint_and_flush_strategy(ctl_table *table, 4201da177e4SLinus Torvalds void __user *oldval, size_t __user *oldlenp, 4211f29bcd7SAlexey Dobriyan void __user *newval, size_t newlen); 42220380731SArnaldo Carvalho de Melo #ifdef CONFIG_PROC_FS 42320380731SArnaldo Carvalho de Melo extern int ip_misc_proc_init(void); 42420380731SArnaldo Carvalho de Melo #endif 42520380731SArnaldo Carvalho de Melo 4261da177e4SLinus Torvalds #endif /* _IP_H */ 427