/* * Linux INET6 implementation * * Authors: * Pedro Roque <roque@di.fc.ul.pt> * * 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/if_inet6.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 /* * Addr scopes */#define IPV6_ADDR_MC_SCOPE(a) \ ((a)->s6_addr[1] & 0x0f) /* nonstandard */#define __IPV6_ADDR_SCOPE_INVALID -1#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 /* * Addr flags */#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ ((a)->s6_addr[1] & 0x10)#define IPV6_ADDR_MC_FLAG_PREFIX(a) \ ((a)->s6_addr[1] & 0x20)#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ ((a)->s6_addr[1] & 0x40) /* * fragmentation header */ struct frag_hdr { __u8 nexthdr; __u8 reserved; __be16 frag_off; __be32 identification;}; #define IP6_MF 0x0001 #include <net/sock.h> /* sysctls */extern int sysctl_mld_max_msf;extern struct ctl_path net_ipv6_ctl_path[]; #define _DEVINC(net, statname, modifier, idev, field) \({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\}) /* per device counters are atomic_long_t */#define _DEVINCATOMIC(net, statname, modifier, idev, field) \({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\}) #define _DEVADD(net, statname, modifier, idev, field, val) \({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\}) #define _DEVUPD(net, statname, modifier, idev, field, val) \({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\}) /* MIBs */ #define IP6_INC_STATS(net, idev,field) \ _DEVINC(net, ipv6, 64, idev, field)#define IP6_INC_STATS_BH(net, idev,field) \ _DEVINC(net, ipv6, 64_BH, idev, field)#define IP6_ADD_STATS(net, idev,field,val) \ _DEVADD(net, ipv6, 64, idev, field, val)#define IP6_ADD_STATS_BH(net, idev,field,val) \ _DEVADD(net, ipv6, 64_BH, idev, field, val)#define IP6_UPD_PO_STATS(net, idev,field,val) \ _DEVUPD(net, ipv6, 64, idev, field, val)#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ _DEVUPD(net, ipv6, 64_BH, idev, field, val)#define ICMP6_INC_STATS(net, idev, field) \ _DEVINCATOMIC(net, icmpv6, , idev, field)#define ICMP6_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6, _BH, idev, field) #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, , idev, field +256)#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field +256)#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field) 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; atomic_t users; struct in6_addr dst; struct ipv6_txoptions *opt; unsigned long linger; u8 share; u32 owner; unsigned long lastuse; unsigned long expires; struct net *fl_net;}; #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)#define IPV6_FLOWLABEL_MASK cpu_to_be32(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 int 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); extern int ipv6_parse_hopopts(struct sk_buff *skb); 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); int ip6_frag_nqueues(struct net *net);int ip6_frag_mem(struct net *net); #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */#define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */#define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ 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(a1, 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){ return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));} static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2){ memcpy(a1, 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; memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); memcpy(pfx->s6_addr, addr, o); if (b != 0) pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);} 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;} 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])) == 0;} 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);} struct inet_frag_queue; enum ip6_defrag_users { IP6_DEFRAG_LOCAL_DELIVER, IP6_DEFRAG_CONNTRACK_IN, __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, IP6_DEFRAG_CONNTRACK_OUT, __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, IP6_DEFRAG_CONNTRACK_BRIDGE_IN, __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,}; struct ip6_create_arg { __be32 id; u32 user; const struct in6_addr *src; const struct in6_addr *dst;}; void ip6_frag_init(struct inet_frag_queue *q, void *a);int ip6_frag_match(struct inet_frag_queue *q, void *a); 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;} static inline int ipv6_addr_loopback(const struct in6_addr *a){ return (a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;} static inline int ipv6_addr_v4mapped(const struct in6_addr *a){ return (a->s6_addr32[0] | a->s6_addr32[1] | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;} /* * Check for a RFC 4843 ORCHID address * (Overlay Routable Cryptographic Hash Identifiers) */static inline int ipv6_addr_orchid(const struct in6_addr *a){ return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);} static inline void ipv6_addr_set_v4mapped(const __be32 addr, struct in6_addr *v4mapped){ ipv6_addr_set(v4mapped, 0, 0, htonl(0x0000FFFF), addr);} /* * 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 + 31 - __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));} extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); /* * 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 flowi6 *fl6, struct ipv6_txoptions *opt, int tclass); extern int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev, const struct in6_addr *saddr, const struct in6_addr *daddr, int proto, int len); extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); Lines 1–500 of 664. 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/* * Linux INET6 implementation * * Authors: * Pedro Roque <roque@di.fc.ul.pt> * * 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/if_inet6.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 /* * Addr scopes */ #define IPV6_ADDR_MC_SCOPE(a) \ ((a)->s6_addr[1] & 0x0f) /* nonstandard */ #define __IPV6_ADDR_SCOPE_INVALID -1 #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 /* * Addr flags */ #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ ((a)->s6_addr[1] & 0x10) #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ ((a)->s6_addr[1] & 0x20) #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ ((a)->s6_addr[1] & 0x40) /* * fragmentation header */ struct frag_hdr { __u8 nexthdr; __u8 reserved; __be16 frag_off; __be32 identification; }; #define IP6_MF 0x0001 #include <net/sock.h> /* sysctls */ extern int sysctl_mld_max_msf; extern struct ctl_path net_ipv6_ctl_path[]; #define _DEVINC(net, statname, modifier, idev, field) \ ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ }) /* per device counters are atomic_long_t */ #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ }) #define _DEVADD(net, statname, modifier, idev, field, val) \ ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ }) #define _DEVUPD(net, statname, modifier, idev, field, val) \ ({ \ struct inet6_dev *_idev = (idev); \ if (likely(_idev != NULL)) \ SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ }) /* MIBs */ #define IP6_INC_STATS(net, idev,field) \ _DEVINC(net, ipv6, 64, idev, field) #define IP6_INC_STATS_BH(net, idev,field) \ _DEVINC(net, ipv6, 64_BH, idev, field) #define IP6_ADD_STATS(net, idev,field,val) \ _DEVADD(net, ipv6, 64, idev, field, val) #define IP6_ADD_STATS_BH(net, idev,field,val) \ _DEVADD(net, ipv6, 64_BH, idev, field, val) #define IP6_UPD_PO_STATS(net, idev,field,val) \ _DEVUPD(net, ipv6, 64, idev, field, val) #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ _DEVUPD(net, ipv6, 64_BH, idev, field, val) #define ICMP6_INC_STATS(net, idev, field) \ _DEVINCATOMIC(net, icmpv6, , idev, field) #define ICMP6_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6, _BH, idev, field) #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, , idev, field +256) #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field +256) #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field) 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; atomic_t users; struct in6_addr dst; struct ipv6_txoptions *opt; unsigned long linger; u8 share; u32 owner; unsigned long lastuse; unsigned long expires; struct net *fl_net; }; #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) #define IPV6_FLOWLABEL_MASK cpu_to_be32(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 int 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); extern int ipv6_parse_hopopts(struct sk_buff *skb); 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); int ip6_frag_nqueues(struct net *net); int ip6_frag_mem(struct net *net); #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */ #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */ #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ 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(a1, 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) { return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); } static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) { memcpy(a1, 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; memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); memcpy(pfx->s6_addr, addr, o); if (b != 0) pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); } 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; } 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])) == 0; } 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); } struct inet_frag_queue; enum ip6_defrag_users { IP6_DEFRAG_LOCAL_DELIVER, IP6_DEFRAG_CONNTRACK_IN, __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, IP6_DEFRAG_CONNTRACK_OUT, __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, IP6_DEFRAG_CONNTRACK_BRIDGE_IN, __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, }; struct ip6_create_arg { __be32 id; u32 user; const struct in6_addr *src; const struct in6_addr *dst; }; void ip6_frag_init(struct inet_frag_queue *q, void *a); int ip6_frag_match(struct inet_frag_queue *q, void *a); 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; } static inline int ipv6_addr_loopback(const struct in6_addr *a) { return (a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; } static inline int ipv6_addr_v4mapped(const struct in6_addr *a) { return (a->s6_addr32[0] | a->s6_addr32[1] | (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; } /* * Check for a RFC 4843 ORCHID address * (Overlay Routable Cryptographic Hash Identifiers) */ static inline int ipv6_addr_orchid(const struct in6_addr *a) { return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); } static inline void ipv6_addr_set_v4mapped(const __be32 addr, struct in6_addr *v4mapped) { ipv6_addr_set(v4mapped, 0, 0, htonl(0x0000FFFF), addr); } /* * 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 + 31 - __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)); } extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt); /* * 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 flowi6 *fl6, struct ipv6_txoptions *opt, int tclass); extern int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev, const struct in6_addr *saddr, const struct in6_addr *daddr, int proto, int len); extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);