/* * Linux INET6 implementation * * Authors: * Pedro Roque <roque@di.fc.ul.pt> * * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $ * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _NET_IPV6_H#define _NET_IPV6_H #include <linux/ipv6.h>#include <linux/hardirq.h>#include <net/ndisc.h>#include <net/flow.h>#include <net/snmp.h> #define SIN6_LEN_RFC2133 24 #define IPV6_MAXPLEN 65535 /* * NextHeader field of IPv6 header */ #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */#define NEXTHDR_TCP 6 /* TCP segment. */#define NEXTHDR_UDP 17 /* UDP message. */#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */#define NEXTHDR_ROUTING 43 /* Routing header. */#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */#define NEXTHDR_ESP 50 /* Encapsulating security payload. */#define NEXTHDR_AUTH 51 /* Authentication header. */#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */#define NEXTHDR_NONE 59 /* No next header */#define NEXTHDR_DEST 60 /* Destination options header. */#define NEXTHDR_MOBILITY 135 /* Mobility header. */ #define NEXTHDR_MAX 255 #define IPV6_DEFAULT_HOPLIMIT 64#define IPV6_DEFAULT_MCASTHOPS 1 /* * Addr type * * type - unicast | multicast * scope - local | site | global * v4 - compat * v4mapped * any * loopback */ #define IPV6_ADDR_ANY 0x0000U #define IPV6_ADDR_UNICAST 0x0001U #define IPV6_ADDR_MULTICAST 0x0002U #define IPV6_ADDR_LOOPBACK 0x0010U#define IPV6_ADDR_LINKLOCAL 0x0020U#define IPV6_ADDR_SITELOCAL 0x0040U #define IPV6_ADDR_COMPATv4 0x0080U #define IPV6_ADDR_SCOPE_MASK 0x00f0U #define IPV6_ADDR_MAPPED 0x1000U#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */ /* * Addr scopes */#ifdef __KERNEL__#define IPV6_ADDR_MC_SCOPE(a) \ ((a)->s6_addr[1] & 0x0f) /* nonstandard */#define __IPV6_ADDR_SCOPE_INVALID -1#endif#define IPV6_ADDR_SCOPE_NODELOCAL 0x01#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02#define IPV6_ADDR_SCOPE_SITELOCAL 0x05#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08#define IPV6_ADDR_SCOPE_GLOBAL 0x0e /* * fragmentation header */ struct frag_hdr { __u8 nexthdr; __u8 reserved; __be16 frag_off; __be32 identification;}; #define IP6_MF 0x0001 #ifdef __KERNEL__ #include <net/sock.h> /* sysctls */extern int sysctl_ipv6_bindv6only;extern int sysctl_mld_max_msf; /* MIBs */DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);#define IP6_INC_STATS(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS(_idev->stats.ipv6, field); \ SNMP_INC_STATS(ipv6_statistics, field); \})#define IP6_INC_STATS_BH(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_BH(_idev->stats.ipv6, field); \ SNMP_INC_STATS_BH(ipv6_statistics, field); \})#define IP6_INC_STATS_USER(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_USER(_idev->stats.ipv6, field); \ SNMP_INC_STATS_USER(ipv6_statistics, field); \})DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);#define ICMP6_INC_STATS(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS(idev->stats.icmpv6, field); \ SNMP_INC_STATS(icmpv6_statistics, field); \})#define ICMP6_INC_STATS_BH(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \ SNMP_INC_STATS_BH(icmpv6_statistics, field); \})#define ICMP6_INC_STATS_USER(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \ SNMP_INC_STATS_USER(icmpv6_statistics, field); \})#define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \ struct inet6_dev *_idev = idev; \ __typeof__(offset) _offset = (offset); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \ SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \})DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);#define UDP6_INC_STATS_BH(field, is_udplite) do { \ if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field); \ else SNMP_INC_STATS_BH(udp_stats_in6, field); } while(0)#define UDP6_INC_STATS_USER(field, is_udplite) do { \ if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field); \ else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0) int snmp6_register_dev(struct inet6_dev *idev);int snmp6_unregister_dev(struct inet6_dev *idev);int snmp6_alloc_dev(struct inet6_dev *idev);int snmp6_free_dev(struct inet6_dev *idev);int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);void snmp6_mib_free(void *ptr[2]); struct ip6_ra_chain{ struct ip6_ra_chain *next; struct sock *sk; int sel; void (*destructor)(struct sock *);}; extern struct ip6_ra_chain *ip6_ra_chain;extern rwlock_t ip6_ra_lock; /* This structure is prepared by protocol, when parsing ancillary data and passed to IPv6. */ struct ipv6_txoptions{ /* Length of this structure */ int tot_len; /* length of extension headers */ __u16 opt_flen; /* after fragment hdr */ __u16 opt_nflen; /* before fragment hdr */ struct ipv6_opt_hdr *hopopt; struct ipv6_opt_hdr *dst0opt; struct ipv6_rt_hdr *srcrt; /* Routing Header */ struct ipv6_opt_hdr *dst1opt; /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */}; struct ip6_flowlabel{ struct ip6_flowlabel *next; __be32 label; struct in6_addr dst; struct ipv6_txoptions *opt; atomic_t users; unsigned long linger; u8 share; u32 owner; unsigned long lastuse; unsigned long expires;}; #define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF) struct ipv6_fl_socklist{ struct ipv6_fl_socklist *next; struct ip6_flowlabel *fl;}; extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, struct ip6_flowlabel * fl, struct ipv6_txoptions * fopt);extern void fl6_free_socklist(struct sock *sk);extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);extern void ip6_flowlabel_init(void);extern void ip6_flowlabel_cleanup(void); static inline void fl6_sock_release(struct ip6_flowlabel *fl){ if (fl) atomic_dec(&fl->users);} extern int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)); extern int ipv6_parse_hopopts(struct sk_buff **skbp); extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, int newtype, struct ipv6_opt_hdr __user *newopt, int newoptlen);struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, struct ipv6_txoptions *opt); extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); extern int ip6_frag_nqueues;extern atomic_t ip6_frag_mem; #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */ /* * Function prototype for build_xmit */ typedef int (*inet_getfrag_t) (const void *data, struct in6_addr *addr, char *, unsigned int, unsigned int); extern int __ipv6_addr_type(const struct in6_addr *addr);static inline int ipv6_addr_type(const struct in6_addr *addr){ return __ipv6_addr_type(addr) & 0xffff;} static inline int ipv6_addr_scope(const struct in6_addr *addr){ return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;} static inline int __ipv6_addr_src_scope(int type){ return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));} static inline int ipv6_addr_src_scope(const struct in6_addr *addr){ return __ipv6_addr_src_scope(__ipv6_addr_type(addr));} static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2){ return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));} static inline intipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, const struct in6_addr *a2){ unsigned int i; for (i = 0; i < 4; i++) if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i]) return 1; return 0;} static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2){ memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));} static inline void ipv6_addr_prefix(struct in6_addr *pfx, const struct in6_addr *addr, int plen){ /* caller must guarantee 0 <= plen <= 128 */ int o = plen >> 3, b = plen & 0x7; memcpy(pfx->s6_addr, addr, o); if (b != 0) { pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); o++; } if (o < 16) memset(pfx->s6_addr + o, 0, 16 - o);} #ifndef __HAVE_ARCH_ADDR_SETstatic inline void ipv6_addr_set(struct in6_addr *addr, __be32 w1, __be32 w2, __be32 w3, __be32 w4){ addr->s6_addr32[0] = w1; addr->s6_addr32[1] = w2; addr->s6_addr32[2] = w3; addr->s6_addr32[3] = w4;}#endif static inline int ipv6_addr_equal(const struct in6_addr *a1, const struct in6_addr *a2){ return (a1->s6_addr32[0] == a2->s6_addr32[0] && a1->s6_addr32[1] == a2->s6_addr32[1] && a1->s6_addr32[2] == a2->s6_addr32[2] && a1->s6_addr32[3] == a2->s6_addr32[3]);} static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, unsigned int prefixlen){ unsigned pdw, pbi; /* check complete u32 in prefix */ pdw = prefixlen >> 5; if (pdw && memcmp(a1, a2, pdw << 2)) return 0; /* check incomplete u32 in prefix */ pbi = prefixlen & 0x1f; if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) return 0; return 1;} static inline int ipv6_prefix_equal(const struct in6_addr *a1, const struct in6_addr *a2, unsigned int prefixlen){ return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, prefixlen);} static inline int ipv6_addr_any(const struct in6_addr *a){ return ((a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | a->s6_addr32[3] ) == 0); } /* * find the first different bit between two addresses * length of address must be a multiple of 32bits */static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen){ const __be32 *a1 = token1, *a2 = token2; int i; addrlen >>= 2; for (i = 0; i < addrlen; i++) { __be32 xb = a1[i] ^ a2[i]; if (xb) return i * 32 + 32 - fls(ntohl(xb)); } /* * we should *never* get to this point since that * would mean the addrs are equal * * However, we do get to it 8) And exacly, when * addresses are equal 8) * * ip route add 1111::/128 via ... * ip route add 1111::/64 via ... * and we are here. * * Ideally, this function should stop comparison * at prefix length. It does not, but it is still OK, * if returned value is greater than prefix length. * --ANK (980803) */ return (addrlen << 5);} static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2){ return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));} /* * Prototypes exported by ipv6 */ /* * rcv function (called from netdevice level) */ extern int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); extern int ip6_rcv_finish(struct sk_buff *skb); /* * upper-layer output functions */extern int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl, struct ipv6_txoptions *opt, int ipfragok); extern int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev, struct in6_addr *saddr, struct in6_addr *daddr, int proto, int len); extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); extern int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, int length, int transhdrlen, int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi *fl, struct rt6_info *rt, unsigned int flags); extern int ip6_push_pending_frames(struct sock *sk); extern void ip6_flush_pending_frames(struct sock *sk); extern int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl);extern int ip6_sk_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl); /* * skb processing functions */ extern int ip6_output(struct sk_buff *skb);extern int ip6_forward(struct sk_buff *skb);extern int ip6_input(struct sk_buff *skb);extern int ip6_mc_input(struct sk_buff *skb); /* * Extension header (options) processing */ Lines 1–500 of 621. 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/* * Linux INET6 implementation * * Authors: * Pedro Roque <roque@di.fc.ul.pt> * * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $ * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _NET_IPV6_H #define _NET_IPV6_H #include <linux/ipv6.h> #include <linux/hardirq.h> #include <net/ndisc.h> #include <net/flow.h> #include <net/snmp.h> #define SIN6_LEN_RFC2133 24 #define IPV6_MAXPLEN 65535 /* * NextHeader field of IPv6 header */ #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ #define NEXTHDR_TCP 6 /* TCP segment. */ #define NEXTHDR_UDP 17 /* UDP message. */ #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ #define NEXTHDR_ROUTING 43 /* Routing header. */ #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ #define NEXTHDR_AUTH 51 /* Authentication header. */ #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ #define NEXTHDR_NONE 59 /* No next header */ #define NEXTHDR_DEST 60 /* Destination options header. */ #define NEXTHDR_MOBILITY 135 /* Mobility header. */ #define NEXTHDR_MAX 255 #define IPV6_DEFAULT_HOPLIMIT 64 #define IPV6_DEFAULT_MCASTHOPS 1 /* * Addr type * * type - unicast | multicast * scope - local | site | global * v4 - compat * v4mapped * any * loopback */ #define IPV6_ADDR_ANY 0x0000U #define IPV6_ADDR_UNICAST 0x0001U #define IPV6_ADDR_MULTICAST 0x0002U #define IPV6_ADDR_LOOPBACK 0x0010U #define IPV6_ADDR_LINKLOCAL 0x0020U #define IPV6_ADDR_SITELOCAL 0x0040U #define IPV6_ADDR_COMPATv4 0x0080U #define IPV6_ADDR_SCOPE_MASK 0x00f0U #define IPV6_ADDR_MAPPED 0x1000U #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */ /* * Addr scopes */ #ifdef __KERNEL__ #define IPV6_ADDR_MC_SCOPE(a) \ ((a)->s6_addr[1] & 0x0f) /* nonstandard */ #define __IPV6_ADDR_SCOPE_INVALID -1 #endif #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e /* * fragmentation header */ struct frag_hdr { __u8 nexthdr; __u8 reserved; __be16 frag_off; __be32 identification; }; #define IP6_MF 0x0001 #ifdef __KERNEL__ #include <net/sock.h> /* sysctls */ extern int sysctl_ipv6_bindv6only; extern int sysctl_mld_max_msf; /* MIBs */ DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics); #define IP6_INC_STATS(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS(_idev->stats.ipv6, field); \ SNMP_INC_STATS(ipv6_statistics, field); \ }) #define IP6_INC_STATS_BH(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_BH(_idev->stats.ipv6, field); \ SNMP_INC_STATS_BH(ipv6_statistics, field); \ }) #define IP6_INC_STATS_USER(idev,field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_USER(_idev->stats.ipv6, field); \ SNMP_INC_STATS_USER(ipv6_statistics, field); \ }) DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics); #define ICMP6_INC_STATS(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS(idev->stats.icmpv6, field); \ SNMP_INC_STATS(icmpv6_statistics, field); \ }) #define ICMP6_INC_STATS_BH(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \ SNMP_INC_STATS_BH(icmpv6_statistics, field); \ }) #define ICMP6_INC_STATS_USER(idev, field) ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \ SNMP_INC_STATS_USER(icmpv6_statistics, field); \ }) #define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \ struct inet6_dev *_idev = idev; \ __typeof__(offset) _offset = (offset); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \ SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \ }) DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6); DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6); #define UDP6_INC_STATS_BH(field, is_udplite) do { \ if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field); \ else SNMP_INC_STATS_BH(udp_stats_in6, field); } while(0) #define UDP6_INC_STATS_USER(field, is_udplite) do { \ if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field); \ else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0) int snmp6_register_dev(struct inet6_dev *idev); int snmp6_unregister_dev(struct inet6_dev *idev); int snmp6_alloc_dev(struct inet6_dev *idev); int snmp6_free_dev(struct inet6_dev *idev); int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign); void snmp6_mib_free(void *ptr[2]); struct ip6_ra_chain { struct ip6_ra_chain *next; struct sock *sk; int sel; void (*destructor)(struct sock *); }; extern struct ip6_ra_chain *ip6_ra_chain; extern rwlock_t ip6_ra_lock; /* This structure is prepared by protocol, when parsing ancillary data and passed to IPv6. */ struct ipv6_txoptions { /* Length of this structure */ int tot_len; /* length of extension headers */ __u16 opt_flen; /* after fragment hdr */ __u16 opt_nflen; /* before fragment hdr */ struct ipv6_opt_hdr *hopopt; struct ipv6_opt_hdr *dst0opt; struct ipv6_rt_hdr *srcrt; /* Routing Header */ struct ipv6_opt_hdr *dst1opt; /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ }; struct ip6_flowlabel { struct ip6_flowlabel *next; __be32 label; struct in6_addr dst; struct ipv6_txoptions *opt; atomic_t users; unsigned long linger; u8 share; u32 owner; unsigned long lastuse; unsigned long expires; }; #define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF) #define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF) struct ipv6_fl_socklist { struct ipv6_fl_socklist *next; struct ip6_flowlabel *fl; }; extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, struct ip6_flowlabel * fl, struct ipv6_txoptions * fopt); extern void fl6_free_socklist(struct sock *sk); extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); extern void ip6_flowlabel_init(void); extern void ip6_flowlabel_cleanup(void); static inline void fl6_sock_release(struct ip6_flowlabel *fl) { if (fl) atomic_dec(&fl->users); } extern int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)); extern int ipv6_parse_hopopts(struct sk_buff **skbp); extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, int newtype, struct ipv6_opt_hdr __user *newopt, int newoptlen); struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, struct ipv6_txoptions *opt); extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); extern int ip6_frag_nqueues; extern atomic_t ip6_frag_mem; #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */ /* * Function prototype for build_xmit */ typedef int (*inet_getfrag_t) (const void *data, struct in6_addr *addr, char *, unsigned int, unsigned int); extern int __ipv6_addr_type(const struct in6_addr *addr); static inline int ipv6_addr_type(const struct in6_addr *addr) { return __ipv6_addr_type(addr) & 0xffff; } static inline int ipv6_addr_scope(const struct in6_addr *addr) { return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; } static inline int __ipv6_addr_src_scope(int type) { return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16)); } static inline int ipv6_addr_src_scope(const struct in6_addr *addr) { return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); } static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) { return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr)); } static inline int ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, const struct in6_addr *a2) { unsigned int i; for (i = 0; i < 4; i++) if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i]) return 1; return 0; } static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) { memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr)); } static inline void ipv6_addr_prefix(struct in6_addr *pfx, const struct in6_addr *addr, int plen) { /* caller must guarantee 0 <= plen <= 128 */ int o = plen >> 3, b = plen & 0x7; memcpy(pfx->s6_addr, addr, o); if (b != 0) { pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); o++; } if (o < 16) memset(pfx->s6_addr + o, 0, 16 - o); } #ifndef __HAVE_ARCH_ADDR_SET static inline void ipv6_addr_set(struct in6_addr *addr, __be32 w1, __be32 w2, __be32 w3, __be32 w4) { addr->s6_addr32[0] = w1; addr->s6_addr32[1] = w2; addr->s6_addr32[2] = w3; addr->s6_addr32[3] = w4; } #endif static inline int ipv6_addr_equal(const struct in6_addr *a1, const struct in6_addr *a2) { return (a1->s6_addr32[0] == a2->s6_addr32[0] && a1->s6_addr32[1] == a2->s6_addr32[1] && a1->s6_addr32[2] == a2->s6_addr32[2] && a1->s6_addr32[3] == a2->s6_addr32[3]); } static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, unsigned int prefixlen) { unsigned pdw, pbi; /* check complete u32 in prefix */ pdw = prefixlen >> 5; if (pdw && memcmp(a1, a2, pdw << 2)) return 0; /* check incomplete u32 in prefix */ pbi = prefixlen & 0x1f; if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) return 0; return 1; } static inline int ipv6_prefix_equal(const struct in6_addr *a1, const struct in6_addr *a2, unsigned int prefixlen) { return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, prefixlen); } static inline int ipv6_addr_any(const struct in6_addr *a) { return ((a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | a->s6_addr32[3] ) == 0); } /* * find the first different bit between two addresses * length of address must be a multiple of 32bits */ static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) { const __be32 *a1 = token1, *a2 = token2; int i; addrlen >>= 2; for (i = 0; i < addrlen; i++) { __be32 xb = a1[i] ^ a2[i]; if (xb) return i * 32 + 32 - fls(ntohl(xb)); } /* * we should *never* get to this point since that * would mean the addrs are equal * * However, we do get to it 8) And exacly, when * addresses are equal 8) * * ip route add 1111::/128 via ... * ip route add 1111::/64 via ... * and we are here. * * Ideally, this function should stop comparison * at prefix length. It does not, but it is still OK, * if returned value is greater than prefix length. * --ANK (980803) */ return (addrlen << 5); } static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) { return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); } /* * Prototypes exported by ipv6 */ /* * rcv function (called from netdevice level) */ extern int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); extern int ip6_rcv_finish(struct sk_buff *skb); /* * upper-layer output functions */ extern int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl, struct ipv6_txoptions *opt, int ipfragok); extern int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev, struct in6_addr *saddr, struct in6_addr *daddr, int proto, int len); extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); extern int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, int length, int transhdrlen, int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi *fl, struct rt6_info *rt, unsigned int flags); extern int ip6_push_pending_frames(struct sock *sk); extern void ip6_flush_pending_frames(struct sock *sk); extern int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl); extern int ip6_sk_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl); /* * skb processing functions */ extern int ip6_output(struct sk_buff *skb); extern int ip6_forward(struct sk_buff *skb); extern int ip6_input(struct sk_buff *skb); extern int ip6_mc_input(struct sk_buff *skb); /* * Extension header (options) processing */