Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux INET6 implementation |
| 3 | * |
| 4 | * Authors: |
| 5 | * Pedro Roque <roque@di.fc.ul.pt> |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _NET_IPV6_H |
| 14 | #define _NET_IPV6_H |
| 15 | |
| 16 | #include <linux/ipv6.h> |
| 17 | #include <linux/hardirq.h> |
Eric Dumazet | 08dcdbf | 2013-02-21 12:18:52 +0000 | [diff] [blame] | 18 | #include <linux/jhash.h> |
Herbert Xu | 20283d8 | 2007-07-30 17:05:49 -0700 | [diff] [blame] | 19 | #include <net/if_inet6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <net/ndisc.h> |
| 21 | #include <net/flow.h> |
Jiri Pirko | 1bd758e | 2015-05-12 14:56:07 +0200 | [diff] [blame] | 22 | #include <net/flow_dissector.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <net/snmp.h> |
| 24 | |
| 25 | #define SIN6_LEN_RFC2133 24 |
| 26 | |
| 27 | #define IPV6_MAXPLEN 65535 |
| 28 | |
| 29 | /* |
| 30 | * NextHeader field of IPv6 header |
| 31 | */ |
| 32 | |
| 33 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ |
| 34 | #define NEXTHDR_TCP 6 /* TCP segment. */ |
| 35 | #define NEXTHDR_UDP 17 /* UDP message. */ |
| 36 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ |
| 37 | #define NEXTHDR_ROUTING 43 /* Routing header. */ |
| 38 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 39 | #define NEXTHDR_GRE 47 /* GRE header. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
| 41 | #define NEXTHDR_AUTH 51 /* Authentication header. */ |
| 42 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ |
| 43 | #define NEXTHDR_NONE 59 /* No next header */ |
| 44 | #define NEXTHDR_DEST 60 /* Destination options header. */ |
Joe Stringer | 280c571 | 2013-07-23 13:37:45 +0900 | [diff] [blame] | 45 | #define NEXTHDR_SCTP 132 /* SCTP message. */ |
Masahide NAKAMURA | 2b74165 | 2006-08-23 20:34:26 -0700 | [diff] [blame] | 46 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define NEXTHDR_MAX 255 |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define IPV6_DEFAULT_HOPLIMIT 64 |
| 51 | #define IPV6_DEFAULT_MCASTHOPS 1 |
| 52 | |
| 53 | /* |
| 54 | * Addr type |
| 55 | * |
| 56 | * type - unicast | multicast |
| 57 | * scope - local | site | global |
| 58 | * v4 - compat |
| 59 | * v4mapped |
| 60 | * any |
| 61 | * loopback |
| 62 | */ |
| 63 | |
| 64 | #define IPV6_ADDR_ANY 0x0000U |
| 65 | |
| 66 | #define IPV6_ADDR_UNICAST 0x0001U |
| 67 | #define IPV6_ADDR_MULTICAST 0x0002U |
| 68 | |
| 69 | #define IPV6_ADDR_LOOPBACK 0x0010U |
| 70 | #define IPV6_ADDR_LINKLOCAL 0x0020U |
| 71 | #define IPV6_ADDR_SITELOCAL 0x0040U |
| 72 | |
| 73 | #define IPV6_ADDR_COMPATv4 0x0080U |
| 74 | |
| 75 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U |
| 76 | |
| 77 | #define IPV6_ADDR_MAPPED 0x1000U |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* |
| 80 | * Addr scopes |
| 81 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #define IPV6_ADDR_MC_SCOPE(a) \ |
| 83 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ |
| 84 | #define __IPV6_ADDR_SCOPE_INVALID -1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
| 86 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 |
| 87 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 |
| 88 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 |
| 89 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e |
| 90 | |
| 91 | /* |
Linus Lüssing | 5ced133 | 2011-02-15 13:19:20 +0000 | [diff] [blame] | 92 | * Addr flags |
| 93 | */ |
Linus Lüssing | 5ced133 | 2011-02-15 13:19:20 +0000 | [diff] [blame] | 94 | #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \ |
| 95 | ((a)->s6_addr[1] & 0x10) |
| 96 | #define IPV6_ADDR_MC_FLAG_PREFIX(a) \ |
| 97 | ((a)->s6_addr[1] & 0x20) |
| 98 | #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \ |
| 99 | ((a)->s6_addr[1] & 0x40) |
Linus Lüssing | 5ced133 | 2011-02-15 13:19:20 +0000 | [diff] [blame] | 100 | |
| 101 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | * fragmentation header |
| 103 | */ |
| 104 | |
| 105 | struct frag_hdr { |
Al Viro | 44473a6 | 2006-11-08 00:21:46 -0800 | [diff] [blame] | 106 | __u8 nexthdr; |
| 107 | __u8 reserved; |
| 108 | __be16 frag_off; |
| 109 | __be32 identification; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
Paul Durrant | 1431fb3 | 2013-12-03 17:39:29 +0000 | [diff] [blame] | 112 | #define IP6_MF 0x0001 |
| 113 | #define IP6_OFFSET 0xFFF8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Lorenzo Colitti | e110861 | 2014-05-13 10:17:33 -0700 | [diff] [blame] | 115 | #define IP6_REPLY_MARK(net, mark) \ |
| 116 | ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #include <net/sock.h> |
| 119 | |
| 120 | /* sysctls */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | extern int sysctl_mld_max_msf; |
Hannes Frederic Sowa | 2f71193 | 2014-09-02 15:49:25 +0200 | [diff] [blame] | 122 | extern int sysctl_mld_qrv; |
Pavel Emelyanov | 3d7cc2b | 2008-01-09 00:33:11 -0800 | [diff] [blame] | 123 | |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 124 | #define _DEVINC(net, statname, modifier, idev, field) \ |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 125 | ({ \ |
| 126 | struct inet6_dev *_idev = (idev); \ |
| 127 | if (likely(_idev != NULL)) \ |
| 128 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
Denis V. Lunev | 9261e53 | 2008-10-08 10:36:03 -0700 | [diff] [blame] | 129 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 130 | }) |
| 131 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 132 | /* per device counters are atomic_long_t */ |
| 133 | #define _DEVINCATOMIC(net, statname, modifier, idev, field) \ |
| 134 | ({ \ |
| 135 | struct inet6_dev *_idev = (idev); \ |
| 136 | if (likely(_idev != NULL)) \ |
| 137 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ |
| 138 | SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\ |
| 139 | }) |
| 140 | |
Eric Dumazet | 2a24444 | 2011-11-13 01:24:04 +0000 | [diff] [blame] | 141 | /* per device and per net counters are atomic_long_t */ |
| 142 | #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \ |
| 143 | ({ \ |
| 144 | struct inet6_dev *_idev = (idev); \ |
| 145 | if (likely(_idev != NULL)) \ |
| 146 | SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \ |
| 147 | SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\ |
| 148 | }) |
| 149 | |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 150 | #define _DEVADD(net, statname, modifier, idev, field, val) \ |
Pavel Emelyanov | 8e7999c | 2007-10-15 02:40:06 -0700 | [diff] [blame] | 151 | ({ \ |
| 152 | struct inet6_dev *_idev = (idev); \ |
| 153 | if (likely(_idev != NULL)) \ |
| 154 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ |
Denis V. Lunev | 9261e53 | 2008-10-08 10:36:03 -0700 | [diff] [blame] | 155 | SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\ |
Pavel Emelyanov | 8e7999c | 2007-10-15 02:40:06 -0700 | [diff] [blame] | 156 | }) |
| 157 | |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 158 | #define _DEVUPD(net, statname, modifier, idev, field, val) \ |
| 159 | ({ \ |
| 160 | struct inet6_dev *_idev = (idev); \ |
| 161 | if (likely(_idev != NULL)) \ |
| 162 | SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \ |
| 163 | SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\ |
| 164 | }) |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /* MIBs */ |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 167 | |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 168 | #define IP6_INC_STATS(net, idev,field) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 169 | _DEVINC(net, ipv6, 64, idev, field) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 170 | #define IP6_INC_STATS_BH(net, idev,field) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 171 | _DEVINC(net, ipv6, 64_BH, idev, field) |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 172 | #define IP6_ADD_STATS(net, idev,field,val) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 173 | _DEVADD(net, ipv6, 64, idev, field, val) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 174 | #define IP6_ADD_STATS_BH(net, idev,field,val) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 175 | _DEVADD(net, ipv6, 64_BH, idev, field, val) |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 176 | #define IP6_UPD_PO_STATS(net, idev,field,val) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 177 | _DEVUPD(net, ipv6, 64, idev, field, val) |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 178 | #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \ |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 179 | _DEVUPD(net, ipv6, 64_BH, idev, field, val) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 180 | #define ICMP6_INC_STATS(net, idev, field) \ |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 181 | _DEVINCATOMIC(net, icmpv6, , idev, field) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 182 | #define ICMP6_INC_STATS_BH(net, idev, field) \ |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 183 | _DEVINCATOMIC(net, icmpv6, _BH, idev, field) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 184 | |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 185 | #define ICMP6MSGOUT_INC_STATS(net, idev, field) \ |
Eric Dumazet | 2a24444 | 2011-11-13 01:24:04 +0000 | [diff] [blame] | 186 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 187 | #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \ |
Eric Dumazet | 2a24444 | 2011-11-13 01:24:04 +0000 | [diff] [blame] | 188 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256) |
Denis V. Lunev | 087fe24 | 2008-10-08 10:35:11 -0700 | [diff] [blame] | 189 | #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \ |
Eric Dumazet | 2a24444 | 2011-11-13 01:24:04 +0000 | [diff] [blame] | 190 | _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 191 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 192 | struct ip6_ra_chain { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | struct ip6_ra_chain *next; |
| 194 | struct sock *sk; |
| 195 | int sel; |
| 196 | void (*destructor)(struct sock *); |
| 197 | }; |
| 198 | |
| 199 | extern struct ip6_ra_chain *ip6_ra_chain; |
| 200 | extern rwlock_t ip6_ra_lock; |
| 201 | |
| 202 | /* |
| 203 | This structure is prepared by protocol, when parsing |
| 204 | ancillary data and passed to IPv6. |
| 205 | */ |
| 206 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 207 | struct ipv6_txoptions { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | /* Length of this structure */ |
| 209 | int tot_len; |
| 210 | |
| 211 | /* length of extension headers */ |
| 212 | |
| 213 | __u16 opt_flen; /* after fragment hdr */ |
| 214 | __u16 opt_nflen; /* before fragment hdr */ |
| 215 | |
| 216 | struct ipv6_opt_hdr *hopopt; |
| 217 | struct ipv6_opt_hdr *dst0opt; |
| 218 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | struct ipv6_opt_hdr *dst1opt; |
| 220 | |
| 221 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
| 222 | }; |
| 223 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 224 | struct ip6_flowlabel { |
Eric Dumazet | 7f0e44a | 2013-03-07 04:20:32 +0000 | [diff] [blame] | 225 | struct ip6_flowlabel __rcu *next; |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 226 | __be32 label; |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 227 | atomic_t users; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | struct in6_addr dst; |
| 229 | struct ipv6_txoptions *opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | unsigned long linger; |
YOSHIFUJI Hideaki / 吉藤英明 | d3aedd5 | 2013-01-30 09:27:47 +0000 | [diff] [blame] | 231 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | u8 share; |
Eric W. Biederman | 4f82f45 | 2012-05-24 10:37:59 -0600 | [diff] [blame] | 233 | union { |
| 234 | struct pid *pid; |
| 235 | kuid_t uid; |
| 236 | } owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | unsigned long lastuse; |
| 238 | unsigned long expires; |
Benjamin Thery | 60e8fbc | 2008-03-26 16:53:08 -0700 | [diff] [blame] | 239 | struct net *fl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | }; |
| 241 | |
Tom Herbert | 82a584b | 2015-04-29 15:33:21 -0700 | [diff] [blame] | 242 | #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF) |
| 243 | #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF) |
| 244 | #define IPV6_FLOWLABEL_STATELESS_FLAG cpu_to_be32(0x00080000) |
| 245 | |
Florent Fourcot | 37cfee9 | 2013-12-08 15:46:58 +0100 | [diff] [blame] | 246 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
Li RongQing | d76ed22 | 2014-01-15 17:03:30 +0800 | [diff] [blame] | 247 | #define IPV6_TCLASS_SHIFT 20 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 249 | struct ipv6_fl_socklist { |
Eric Dumazet | 7f0e44a | 2013-03-07 04:20:32 +0000 | [diff] [blame] | 250 | struct ipv6_fl_socklist __rcu *next; |
| 251 | struct ip6_flowlabel *fl; |
| 252 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | }; |
| 254 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 255 | struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
| 256 | struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, |
| 257 | struct ip6_flowlabel *fl, |
| 258 | struct ipv6_txoptions *fopt); |
| 259 | void fl6_free_socklist(struct sock *sk); |
| 260 | int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); |
Florent Fourcot | 46e5f40 | 2014-01-17 17:15:04 +0100 | [diff] [blame] | 261 | int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, |
| 262 | int flags); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 263 | int ip6_flowlabel_init(void); |
| 264 | void ip6_flowlabel_cleanup(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) |
| 267 | { |
| 268 | if (fl) |
| 269 | atomic_dec(&fl->users); |
| 270 | } |
| 271 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 272 | void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); |
David S. Miller | b94f1c0 | 2012-07-12 00:33:37 -0700 | [diff] [blame] | 273 | |
Lorenzo Colitti | 6d0bfe2 | 2013-05-22 20:17:31 +0000 | [diff] [blame] | 274 | int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
| 275 | struct icmp6hdr *thdr, int len); |
| 276 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 277 | int ip6_ra_control(struct sock *sk, int sel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 279 | int ipv6_parse_hopopts(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 281 | struct ipv6_txoptions *ipv6_dup_options(struct sock *sk, |
| 282 | struct ipv6_txoptions *opt); |
| 283 | struct ipv6_txoptions *ipv6_renew_options(struct sock *sk, |
| 284 | struct ipv6_txoptions *opt, |
| 285 | int newtype, |
| 286 | struct ipv6_opt_hdr __user *newopt, |
| 287 | int newoptlen); |
YOSHIFUJI Hideaki | df9890c | 2005-11-20 12:23:18 +0900 | [diff] [blame] | 288 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
| 289 | struct ipv6_txoptions *opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Eric Dumazet | a224772 | 2014-09-27 09:50:56 -0700 | [diff] [blame] | 291 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
| 292 | const struct inet6_skb_parm *opt); |
Arnaldo Carvalho de Melo | 399c07d | 2005-12-13 23:24:28 -0800 | [diff] [blame] | 293 | |
Shmulik Ladkani | aeaf6e9 | 2012-11-30 10:25:59 +0000 | [diff] [blame] | 294 | static inline bool ipv6_accept_ra(struct inet6_dev *idev) |
| 295 | { |
| 296 | /* If forwarding is enabled, RA are not accepted unless the special |
| 297 | * hybrid mode (accept_ra=2) is enabled. |
| 298 | */ |
| 299 | return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : |
| 300 | idev->cnf.accept_ra; |
| 301 | } |
| 302 | |
Amerigo Wang | d4915c0 | 2012-09-18 16:50:10 +0000 | [diff] [blame] | 303 | #if IS_ENABLED(CONFIG_IPV6) |
Amerigo Wang | d4915c0 | 2012-09-18 16:50:10 +0000 | [diff] [blame] | 304 | static inline int ip6_frag_mem(struct net *net) |
| 305 | { |
Jesper Dangaard Brouer | d433673 | 2013-01-28 23:45:12 +0000 | [diff] [blame] | 306 | return sum_frag_mem_limit(&net->ipv6.frags); |
Amerigo Wang | d4915c0 | 2012-09-18 16:50:10 +0000 | [diff] [blame] | 307 | } |
| 308 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Jesper Dangaard Brouer | c2a9366 | 2013-01-15 07:16:35 +0000 | [diff] [blame] | 310 | #define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024) /* 4194304 */ |
| 311 | #define IPV6_FRAG_LOW_THRESH (3 * 1024*1024) /* 3145728 */ |
Joe Perches | 9874c41 | 2010-02-16 18:40:04 +0000 | [diff] [blame] | 312 | #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 314 | int __ipv6_addr_type(const struct in6_addr *addr); |
YOSHIFUJI Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 315 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
| 316 | { |
| 317 | return __ipv6_addr_type(addr) & 0xffff; |
| 318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | static inline int ipv6_addr_scope(const struct in6_addr *addr) |
| 321 | { |
YOSHIFUJI Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 322 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
| 323 | } |
| 324 | |
| 325 | static inline int __ipv6_addr_src_scope(int type) |
| 326 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 327 | return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16); |
YOSHIFUJI Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) |
| 331 | { |
| 332 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Hannes Frederic Sowa | b7ef213 | 2013-03-08 02:07:16 +0000 | [diff] [blame] | 335 | static inline bool __ipv6_addr_needs_scope_id(int type) |
| 336 | { |
| 337 | return type & IPV6_ADDR_LINKLOCAL || |
| 338 | (type & IPV6_ADDR_MULTICAST && |
| 339 | (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL))); |
| 340 | } |
| 341 | |
| 342 | static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface) |
| 343 | { |
| 344 | return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0; |
| 345 | } |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
| 348 | { |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 349 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 352 | static inline bool |
Patrick McHardy | f2ffd9e | 2006-03-20 18:03:16 -0800 | [diff] [blame] | 353 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
| 354 | const struct in6_addr *a2) |
| 355 | { |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 356 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 357 | const unsigned long *ul1 = (const unsigned long *)a1; |
| 358 | const unsigned long *ulm = (const unsigned long *)m; |
| 359 | const unsigned long *ul2 = (const unsigned long *)a2; |
| 360 | |
| 361 | return !!(((ul1[0] ^ ul2[0]) & ulm[0]) | |
| 362 | ((ul1[1] ^ ul2[1]) & ulm[1])); |
| 363 | #else |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 364 | return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) | |
| 365 | ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) | |
| 366 | ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) | |
| 367 | ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])); |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 368 | #endif |
Patrick McHardy | f2ffd9e | 2006-03-20 18:03:16 -0800 | [diff] [blame] | 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
| 372 | const struct in6_addr *addr, |
| 373 | int plen) |
| 374 | { |
| 375 | /* caller must guarantee 0 <= plen <= 128 */ |
| 376 | int o = plen >> 3, |
| 377 | b = plen & 0x7; |
| 378 | |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 379 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | memcpy(pfx->s6_addr, addr, o); |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 381 | if (b != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
YOSHIFUJI Hideaki / 吉藤英明 | 5206c57 | 2013-01-14 07:10:24 +0000 | [diff] [blame] | 385 | static inline void __ipv6_addr_set_half(__be32 *addr, |
| 386 | __be32 wh, __be32 wl) |
| 387 | { |
| 388 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 389 | #if defined(__BIG_ENDIAN) |
| 390 | if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { |
| 391 | *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); |
| 392 | return; |
| 393 | } |
| 394 | #elif defined(__LITTLE_ENDIAN) |
| 395 | if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { |
| 396 | *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); |
| 397 | return; |
| 398 | } |
| 399 | #endif |
| 400 | #endif |
| 401 | addr[0] = wh; |
| 402 | addr[1] = wl; |
| 403 | } |
| 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | static inline void ipv6_addr_set(struct in6_addr *addr, |
Al Viro | 48818f8 | 2006-09-27 18:44:54 -0700 | [diff] [blame] | 406 | __be32 w1, __be32 w2, |
| 407 | __be32 w3, __be32 w4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | { |
YOSHIFUJI Hideaki / 吉藤英明 | 5206c57 | 2013-01-14 07:10:24 +0000 | [diff] [blame] | 409 | __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); |
| 410 | __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 413 | static inline bool ipv6_addr_equal(const struct in6_addr *a1, |
| 414 | const struct in6_addr *a2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 416 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 417 | const unsigned long *ul1 = (const unsigned long *)a1; |
| 418 | const unsigned long *ul2 = (const unsigned long *)a2; |
| 419 | |
| 420 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; |
| 421 | #else |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 422 | return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) | |
| 423 | (a1->s6_addr32[1] ^ a2->s6_addr32[1]) | |
| 424 | (a1->s6_addr32[2] ^ a2->s6_addr32[2]) | |
| 425 | (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0; |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 426 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
YOSHIFUJI Hideaki / 吉藤英明 | 3867517 | 2013-01-14 07:10:38 +0000 | [diff] [blame] | 429 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 430 | static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, |
| 431 | const __be64 *a2, |
| 432 | unsigned int len) |
| 433 | { |
Fabio Baltieri | 512613d | 2013-01-16 22:30:17 +0100 | [diff] [blame] | 434 | if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len)))) |
YOSHIFUJI Hideaki / 吉藤英明 | 3867517 | 2013-01-14 07:10:38 +0000 | [diff] [blame] | 435 | return false; |
| 436 | return true; |
| 437 | } |
| 438 | |
| 439 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
| 440 | const struct in6_addr *addr2, |
| 441 | unsigned int prefixlen) |
| 442 | { |
| 443 | const __be64 *a1 = (const __be64 *)addr1; |
| 444 | const __be64 *a2 = (const __be64 *)addr2; |
| 445 | |
| 446 | if (prefixlen >= 64) { |
| 447 | if (a1[0] ^ a2[0]) |
| 448 | return false; |
| 449 | return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); |
| 450 | } |
| 451 | return __ipv6_prefix_equal64_half(a1, a2, prefixlen); |
| 452 | } |
| 453 | #else |
YOSHIFUJI Hideaki / 吉藤英明 | 2ef9733 | 2013-01-14 07:10:31 +0000 | [diff] [blame] | 454 | static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, |
| 455 | const struct in6_addr *addr2, |
| 456 | unsigned int prefixlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | { |
YOSHIFUJI Hideaki / 吉藤英明 | 2ef9733 | 2013-01-14 07:10:31 +0000 | [diff] [blame] | 458 | const __be32 *a1 = addr1->s6_addr32; |
| 459 | const __be32 *a2 = addr2->s6_addr32; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 460 | unsigned int pdw, pbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | /* check complete u32 in prefix */ |
| 463 | pdw = prefixlen >> 5; |
| 464 | if (pdw && memcmp(a1, a2, pdw << 2)) |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 465 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | /* check incomplete u32 in prefix */ |
| 468 | pbi = prefixlen & 0x1f; |
| 469 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 470 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 472 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 3867517 | 2013-01-14 07:10:38 +0000 | [diff] [blame] | 474 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Pavel Emelyanov | 2588fe1 | 2007-10-17 19:44:34 -0700 | [diff] [blame] | 476 | struct inet_frag_queue; |
Pavel Emelyanov | 2588fe1 | 2007-10-17 19:44:34 -0700 | [diff] [blame] | 477 | |
Patrick McHardy | 0b5ccb2 | 2009-12-15 16:59:18 +0100 | [diff] [blame] | 478 | enum ip6_defrag_users { |
| 479 | IP6_DEFRAG_LOCAL_DELIVER, |
| 480 | IP6_DEFRAG_CONNTRACK_IN, |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 481 | __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
Patrick McHardy | 0b5ccb2 | 2009-12-15 16:59:18 +0100 | [diff] [blame] | 482 | IP6_DEFRAG_CONNTRACK_OUT, |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 483 | __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
Patrick McHardy | 8fa9ff6 | 2009-12-15 16:59:59 +0100 | [diff] [blame] | 484 | IP6_DEFRAG_CONNTRACK_BRIDGE_IN, |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 485 | __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
Patrick McHardy | 0b5ccb2 | 2009-12-15 16:59:18 +0100 | [diff] [blame] | 486 | }; |
| 487 | |
Pavel Emelyanov | c6fda28 | 2007-10-17 19:46:47 -0700 | [diff] [blame] | 488 | struct ip6_create_arg { |
| 489 | __be32 id; |
Patrick McHardy | 0b5ccb2 | 2009-12-15 16:59:18 +0100 | [diff] [blame] | 490 | u32 user; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 491 | const struct in6_addr *src; |
| 492 | const struct in6_addr *dst; |
Hannes Frederic Sowa | eec2e61 | 2013-03-22 08:24:44 +0000 | [diff] [blame] | 493 | u8 ecn; |
Pavel Emelyanov | c6fda28 | 2007-10-17 19:46:47 -0700 | [diff] [blame] | 494 | }; |
| 495 | |
Florian Westphal | 36c7778 | 2014-07-24 16:50:29 +0200 | [diff] [blame] | 496 | void ip6_frag_init(struct inet_frag_queue *q, const void *a); |
| 497 | bool ip6_frag_match(const struct inet_frag_queue *q, const void *a); |
Pavel Emelyanov | c6fda28 | 2007-10-17 19:46:47 -0700 | [diff] [blame] | 498 | |
Amerigo Wang | b836c99 | 2012-09-18 16:50:09 +0000 | [diff] [blame] | 499 | /* |
| 500 | * Equivalent of ipv4 struct ip |
| 501 | */ |
| 502 | struct frag_queue { |
| 503 | struct inet_frag_queue q; |
| 504 | |
| 505 | __be32 id; /* fragment id */ |
| 506 | u32 user; |
| 507 | struct in6_addr saddr; |
| 508 | struct in6_addr daddr; |
| 509 | |
| 510 | int iif; |
| 511 | unsigned int csum; |
| 512 | __u16 nhoffset; |
Hannes Frederic Sowa | eec2e61 | 2013-03-22 08:24:44 +0000 | [diff] [blame] | 513 | u8 ecn; |
Amerigo Wang | b836c99 | 2012-09-18 16:50:09 +0000 | [diff] [blame] | 514 | }; |
| 515 | |
| 516 | void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq, |
| 517 | struct inet_frags *frags); |
| 518 | |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 519 | static inline bool ipv6_addr_any(const struct in6_addr *a) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 521 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 522 | const unsigned long *ul = (const unsigned long *)a; |
| 523 | |
| 524 | return (ul[0] | ul[1]) == 0UL; |
| 525 | #else |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 526 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
| 527 | a->s6_addr32[2] | a->s6_addr32[3]) == 0; |
Eric Dumazet | 1a203cb | 2012-07-10 19:05:57 +0000 | [diff] [blame] | 528 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 531 | static inline u32 ipv6_addr_hash(const struct in6_addr *a) |
| 532 | { |
| 533 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 534 | const unsigned long *ul = (const unsigned long *)a; |
| 535 | unsigned long x = ul[0] ^ ul[1]; |
| 536 | |
| 537 | return (u32)(x ^ (x >> 32)); |
| 538 | #else |
| 539 | return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^ |
| 540 | a->s6_addr32[2] ^ a->s6_addr32[3]); |
| 541 | #endif |
| 542 | } |
| 543 | |
Eric Dumazet | 08dcdbf | 2013-02-21 12:18:52 +0000 | [diff] [blame] | 544 | /* more secured version of ipv6_addr_hash() */ |
Hannes Frederic Sowa | b50026b | 2013-10-19 21:48:52 +0200 | [diff] [blame] | 545 | static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval) |
Eric Dumazet | 08dcdbf | 2013-02-21 12:18:52 +0000 | [diff] [blame] | 546 | { |
| 547 | u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1]; |
| 548 | |
| 549 | return jhash_3words(v, |
| 550 | (__force u32)a->s6_addr32[2], |
| 551 | (__force u32)a->s6_addr32[3], |
Hannes Frederic Sowa | b50026b | 2013-10-19 21:48:52 +0200 | [diff] [blame] | 552 | initval); |
Eric Dumazet | 08dcdbf | 2013-02-21 12:18:52 +0000 | [diff] [blame] | 553 | } |
| 554 | |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 555 | static inline bool ipv6_addr_loopback(const struct in6_addr *a) |
YOSHIFUJI Hideaki | f630e43 | 2008-06-19 16:33:57 -0700 | [diff] [blame] | 556 | { |
YOSHIFUJI Hideaki / 吉藤英明 | e287656 | 2013-01-14 07:10:06 +0000 | [diff] [blame] | 557 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 558 | const __be64 *be = (const __be64 *)a; |
YOSHIFUJI Hideaki / 吉藤英明 | e287656 | 2013-01-14 07:10:06 +0000 | [diff] [blame] | 559 | |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 560 | return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL; |
YOSHIFUJI Hideaki / 吉藤英明 | e287656 | 2013-01-14 07:10:06 +0000 | [diff] [blame] | 561 | #else |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 562 | return (a->s6_addr32[0] | a->s6_addr32[1] | |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 563 | a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0; |
YOSHIFUJI Hideaki / 吉藤英明 | e287656 | 2013-01-14 07:10:06 +0000 | [diff] [blame] | 564 | #endif |
YOSHIFUJI Hideaki | f630e43 | 2008-06-19 16:33:57 -0700 | [diff] [blame] | 565 | } |
| 566 | |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 567 | /* |
| 568 | * Note that we must __force cast these to unsigned long to make sparse happy, |
| 569 | * since all of the endian-annotated types are fixed size regardless of arch. |
| 570 | */ |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 571 | static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) |
Brian Haley | e773e4f | 2007-08-24 23:16:08 -0700 | [diff] [blame] | 572 | { |
YOSHIFUJI Hideaki / 吉藤英明 | a04d40b | 2013-01-14 07:10:14 +0000 | [diff] [blame] | 573 | return ( |
| 574 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 575 | *(unsigned long *)a | |
YOSHIFUJI Hideaki / 吉藤英明 | a04d40b | 2013-01-14 07:10:14 +0000 | [diff] [blame] | 576 | #else |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 577 | (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) | |
YOSHIFUJI Hideaki / 吉藤英明 | a04d40b | 2013-01-14 07:10:14 +0000 | [diff] [blame] | 578 | #endif |
Jeff Layton | 1373a77 | 2014-07-16 06:55:46 -0400 | [diff] [blame] | 579 | (__force unsigned long)(a->s6_addr32[2] ^ |
| 580 | cpu_to_be32(0x0000ffff))) == 0UL; |
Brian Haley | e773e4f | 2007-08-24 23:16:08 -0700 | [diff] [blame] | 581 | } |
| 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | /* |
Juha-Matti Tapio | 99cd07a | 2008-02-28 20:55:46 -0800 | [diff] [blame] | 584 | * Check for a RFC 4843 ORCHID address |
| 585 | * (Overlay Routable Cryptographic Hash Identifiers) |
| 586 | */ |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 587 | static inline bool ipv6_addr_orchid(const struct in6_addr *a) |
Juha-Matti Tapio | 99cd07a | 2008-02-28 20:55:46 -0800 | [diff] [blame] | 588 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 589 | return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010); |
Juha-Matti Tapio | 99cd07a | 2008-02-28 20:55:46 -0800 | [diff] [blame] | 590 | } |
| 591 | |
Lorenzo Colitti | 5c98631 | 2014-04-29 11:57:34 +0900 | [diff] [blame] | 592 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
| 593 | { |
| 594 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
| 595 | } |
| 596 | |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 597 | static inline void ipv6_addr_set_v4mapped(const __be32 addr, |
| 598 | struct in6_addr *v4mapped) |
| 599 | { |
| 600 | ipv6_addr_set(v4mapped, |
| 601 | 0, 0, |
| 602 | htonl(0x0000FFFF), |
| 603 | addr); |
| 604 | } |
| 605 | |
Juha-Matti Tapio | 99cd07a | 2008-02-28 20:55:46 -0800 | [diff] [blame] | 606 | /* |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 607 | * find the first different bit between two addresses |
| 608 | * length of address must be a multiple of 32bits |
| 609 | */ |
YOSHIFUJI Hideaki / 吉藤英明 | 9f2e733 | 2013-01-14 07:09:54 +0000 | [diff] [blame] | 610 | static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen) |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 611 | { |
Al Viro | ef296f5 | 2006-11-14 20:56:33 -0800 | [diff] [blame] | 612 | const __be32 *a1 = token1, *a2 = token2; |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 613 | int i; |
| 614 | |
| 615 | addrlen >>= 2; |
| 616 | |
| 617 | for (i = 0; i < addrlen; i++) { |
Al Viro | ef296f5 | 2006-11-14 20:56:33 -0800 | [diff] [blame] | 618 | __be32 xb = a1[i] ^ a2[i]; |
| 619 | if (xb) |
YOSHIFUJI Hideaki / 吉藤英明 | d57b8fb | 2010-03-29 06:00:05 +0000 | [diff] [blame] | 620 | return i * 32 + 31 - __fls(ntohl(xb)); |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | /* |
| 624 | * we should *never* get to this point since that |
| 625 | * would mean the addrs are equal |
| 626 | * |
| 627 | * However, we do get to it 8) And exacly, when |
| 628 | * addresses are equal 8) |
| 629 | * |
| 630 | * ip route add 1111::/128 via ... |
| 631 | * ip route add 1111::/64 via ... |
| 632 | * and we are here. |
| 633 | * |
| 634 | * Ideally, this function should stop comparison |
| 635 | * at prefix length. It does not, but it is still OK, |
| 636 | * if returned value is greater than prefix length. |
| 637 | * --ANK (980803) |
| 638 | */ |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 639 | return addrlen << 5; |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 640 | } |
| 641 | |
YOSHIFUJI Hideaki / 吉藤英明 | 9f2e733 | 2013-01-14 07:09:54 +0000 | [diff] [blame] | 642 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 643 | static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen) |
| 644 | { |
| 645 | const __be64 *a1 = token1, *a2 = token2; |
| 646 | int i; |
| 647 | |
| 648 | addrlen >>= 3; |
| 649 | |
| 650 | for (i = 0; i < addrlen; i++) { |
| 651 | __be64 xb = a1[i] ^ a2[i]; |
| 652 | if (xb) |
| 653 | return i * 64 + 63 - __fls(be64_to_cpu(xb)); |
| 654 | } |
| 655 | |
| 656 | return addrlen << 6; |
| 657 | } |
| 658 | #endif |
| 659 | |
| 660 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) |
| 661 | { |
| 662 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
| 663 | if (__builtin_constant_p(addrlen) && !(addrlen & 7)) |
| 664 | return __ipv6_addr_diff64(token1, token2, addrlen); |
| 665 | #endif |
| 666 | return __ipv6_addr_diff32(token1, token2, addrlen); |
| 667 | } |
| 668 | |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 669 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
| 670 | { |
| 671 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); |
| 672 | } |
| 673 | |
Eric Dumazet | 7f15986 | 2015-05-25 16:02:21 -0700 | [diff] [blame] | 674 | __be32 ipv6_select_ident(struct net *net, |
| 675 | const struct in6_addr *daddr, |
| 676 | const struct in6_addr *saddr); |
Hannes Frederic Sowa | 5a352dd | 2015-03-25 17:07:45 +0100 | [diff] [blame] | 677 | void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb); |
Ben Hutchings | 5188cd4 | 2014-10-30 18:27:17 +0000 | [diff] [blame] | 678 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 679 | int ip6_dst_hoplimit(struct dst_entry *dst); |
Cong Wang | 3ce9b35 | 2013-08-31 13:44:28 +0800 | [diff] [blame] | 680 | |
Lorenzo Colitti | 5c98631 | 2014-04-29 11:57:34 +0900 | [diff] [blame] | 681 | static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6, |
| 682 | struct dst_entry *dst) |
| 683 | { |
| 684 | int hlimit; |
| 685 | |
| 686 | if (ipv6_addr_is_multicast(&fl6->daddr)) |
| 687 | hlimit = np->mcast_hops; |
| 688 | else |
| 689 | hlimit = np->hop_limit; |
| 690 | if (hlimit < 0) |
| 691 | hlimit = ip6_dst_hoplimit(dst); |
| 692 | return hlimit; |
| 693 | } |
| 694 | |
Tom Herbert | c3f8324 | 2015-06-04 09:16:40 -0700 | [diff] [blame] | 695 | /* copy IPv6 saddr & daddr to flow_keys, possibly using 64bit load/store |
| 696 | * Equivalent to : flow->v6addrs.src = iph->saddr; |
| 697 | * flow->v6addrs.dst = iph->daddr; |
| 698 | */ |
| 699 | static inline void iph_to_flow_copy_v6addrs(struct flow_keys *flow, |
| 700 | const struct ipv6hdr *iph) |
| 701 | { |
| 702 | BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) != |
| 703 | offsetof(typeof(flow->addrs), v6addrs.src) + |
| 704 | sizeof(flow->addrs.v6addrs.src)); |
| 705 | memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs)); |
| 706 | flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; |
| 707 | } |
| 708 | |
Florian Fainelli | a37934f | 2014-07-08 11:15:03 -0700 | [diff] [blame] | 709 | #if IS_ENABLED(CONFIG_IPV6) |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 710 | |
| 711 | /* Sysctl settings for net ipv6.auto_flowlabels */ |
| 712 | #define IP6_AUTO_FLOW_LABEL_OFF 0 |
| 713 | #define IP6_AUTO_FLOW_LABEL_OPTOUT 1 |
| 714 | #define IP6_AUTO_FLOW_LABEL_OPTIN 2 |
| 715 | #define IP6_AUTO_FLOW_LABEL_FORCED 3 |
| 716 | |
| 717 | #define IP6_AUTO_FLOW_LABEL_MAX IP6_AUTO_FLOW_LABEL_FORCED |
| 718 | |
Tom Herbert | b567741 | 2015-07-31 16:52:14 -0700 | [diff] [blame] | 719 | #define IP6_DEFAULT_AUTO_FLOW_LABELS IP6_AUTO_FLOW_LABEL_OPTOUT |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 720 | |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 721 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
Tom Herbert | 67800f9 | 2015-07-31 16:52:11 -0700 | [diff] [blame] | 722 | __be32 flowlabel, bool autolabel, |
| 723 | struct flowi6 *fl6) |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 724 | { |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 725 | u32 hash; |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 726 | |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 727 | if (flowlabel || |
| 728 | net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF || |
| 729 | (!autolabel && |
| 730 | net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED)) |
| 731 | return flowlabel; |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 732 | |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 733 | hash = skb_get_hash_flowi6(skb, fl6); |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 734 | |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 735 | /* Since this is being sent on the wire obfuscate hash a bit |
| 736 | * to minimize possbility that any useful information to an |
| 737 | * attacker is leaked. Only lower 20 bits are relevant. |
| 738 | */ |
| 739 | rol32(hash, 16); |
Tom Herbert | 82a584b | 2015-04-29 15:33:21 -0700 | [diff] [blame] | 740 | |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 741 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
| 742 | |
| 743 | if (net->ipv6.sysctl.flowlabel_state_ranges) |
| 744 | flowlabel |= IPV6_FLOWLABEL_STATELESS_FLAG; |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 745 | |
| 746 | return flowlabel; |
| 747 | } |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 748 | |
| 749 | static inline int ip6_default_np_autolabel(struct net *net) |
| 750 | { |
| 751 | switch (net->ipv6.sysctl.auto_flowlabels) { |
| 752 | case IP6_AUTO_FLOW_LABEL_OFF: |
| 753 | case IP6_AUTO_FLOW_LABEL_OPTIN: |
| 754 | default: |
| 755 | return 0; |
| 756 | case IP6_AUTO_FLOW_LABEL_OPTOUT: |
| 757 | case IP6_AUTO_FLOW_LABEL_FORCED: |
| 758 | return 1; |
| 759 | } |
| 760 | } |
Florian Fainelli | a37934f | 2014-07-08 11:15:03 -0700 | [diff] [blame] | 761 | #else |
| 762 | static inline void ip6_set_txhash(struct sock *sk) { } |
| 763 | static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb, |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 764 | __be32 flowlabel, bool autolabel, |
| 765 | struct flowi6 *fl6) |
Florian Fainelli | a37934f | 2014-07-08 11:15:03 -0700 | [diff] [blame] | 766 | { |
| 767 | return flowlabel; |
| 768 | } |
Tom Herbert | 4224090 | 2015-07-31 16:52:12 -0700 | [diff] [blame] | 769 | static inline int ip6_default_np_autolabel(struct net *net) |
| 770 | { |
| 771 | return 0; |
| 772 | } |
Florian Fainelli | a37934f | 2014-07-08 11:15:03 -0700 | [diff] [blame] | 773 | #endif |
| 774 | |
Tom Herbert | cb1ce2e | 2014-07-01 21:33:10 -0700 | [diff] [blame] | 775 | |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 776 | /* |
YOSHIFUJI Hideaki / 吉藤英明 | 3e4e4c1 | 2013-01-13 05:01:39 +0000 | [diff] [blame] | 777 | * Header manipulation |
| 778 | */ |
| 779 | static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass, |
| 780 | __be32 flowlabel) |
| 781 | { |
YOSHIFUJI Hideaki | 07f623d | 2013-01-17 12:10:57 +0900 | [diff] [blame] | 782 | *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel; |
YOSHIFUJI Hideaki / 吉藤英明 | 3e4e4c1 | 2013-01-13 05:01:39 +0000 | [diff] [blame] | 783 | } |
| 784 | |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 785 | static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr) |
| 786 | { |
| 787 | return *(__be32 *)hdr & IPV6_FLOWINFO_MASK; |
| 788 | } |
| 789 | |
Florent Fourcot | 3308de2 | 2013-12-08 15:47:00 +0100 | [diff] [blame] | 790 | static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr) |
| 791 | { |
| 792 | return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK; |
| 793 | } |
| 794 | |
Li RongQing | d76ed22 | 2014-01-15 17:03:30 +0800 | [diff] [blame] | 795 | static inline u8 ip6_tclass(__be32 flowinfo) |
| 796 | { |
| 797 | return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT; |
| 798 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 3e4e4c1 | 2013-01-13 05:01:39 +0000 | [diff] [blame] | 799 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | * Prototypes exported by ipv6 |
| 801 | */ |
| 802 | |
| 803 | /* |
| 804 | * rcv function (called from netdevice level) |
| 805 | */ |
| 806 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 807 | int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, |
| 808 | struct packet_type *pt, struct net_device *orig_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Eric W. Biederman | 0c4b51f | 2015-09-15 20:04:18 -0500 | [diff] [blame] | 810 | int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
Patrick McHardy | b05e106 | 2006-01-06 23:03:34 -0800 | [diff] [blame] | 811 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | /* |
| 813 | * upper-layer output functions |
| 814 | */ |
Eric Dumazet | 1c1e9d2 | 2015-09-25 07:39:20 -0700 | [diff] [blame] | 815 | int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 816 | struct ipv6_txoptions *opt, int tclass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 818 | int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 820 | int ip6_append_data(struct sock *sk, |
| 821 | int getfrag(void *from, char *to, int offset, int len, |
| 822 | int odd, struct sk_buff *skb), |
| 823 | void *from, int length, int transhdrlen, int hlimit, |
| 824 | int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6, |
| 825 | struct rt6_info *rt, unsigned int flags, int dontfrag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 827 | int ip6_push_pending_frames(struct sock *sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 829 | void ip6_flush_pending_frames(struct sock *sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
Vlad Yasevich | 6422398 | 2015-01-31 10:40:15 -0500 | [diff] [blame] | 831 | int ip6_send_skb(struct sk_buff *skb); |
| 832 | |
| 833 | struct sk_buff *__ip6_make_skb(struct sock *sk, struct sk_buff_head *queue, |
| 834 | struct inet_cork_full *cork, |
| 835 | struct inet6_cork *v6_cork); |
| 836 | struct sk_buff *ip6_make_skb(struct sock *sk, |
| 837 | int getfrag(void *from, char *to, int offset, |
| 838 | int len, int odd, struct sk_buff *skb), |
| 839 | void *from, int length, int transhdrlen, |
| 840 | int hlimit, int tclass, struct ipv6_txoptions *opt, |
| 841 | struct flowi6 *fl6, struct rt6_info *rt, |
| 842 | unsigned int flags, int dontfrag); |
| 843 | |
| 844 | static inline struct sk_buff *ip6_finish_skb(struct sock *sk) |
| 845 | { |
| 846 | return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork, |
| 847 | &inet6_sk(sk)->cork); |
| 848 | } |
| 849 | |
Roopa Prabhu | 343d60a | 2015-07-30 13:34:53 -0700 | [diff] [blame] | 850 | int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst, |
| 851 | struct flowi6 *fl6); |
Eric Dumazet | 3aef934 | 2015-09-25 07:39:12 -0700 | [diff] [blame] | 852 | struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6, |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 853 | const struct in6_addr *final_dst); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 854 | struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 855 | const struct in6_addr *final_dst); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 856 | struct dst_entry *ip6_blackhole_route(struct net *net, |
| 857 | struct dst_entry *orig_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | /* |
| 860 | * skb processing functions |
| 861 | */ |
| 862 | |
Eric Dumazet | aad8872 | 2014-04-15 13:47:15 -0400 | [diff] [blame] | 863 | int ip6_output(struct sock *sk, struct sk_buff *skb); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 864 | int ip6_forward(struct sk_buff *skb); |
| 865 | int ip6_input(struct sk_buff *skb); |
| 866 | int ip6_mc_input(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
Eric W. Biederman | 9f8955c | 2015-10-07 16:48:39 -0500 | [diff] [blame^] | 868 | int __ip6_local_out(struct sock *sk, struct sk_buff *skb); |
David Miller | 79b16aa | 2015-04-05 22:19:09 -0400 | [diff] [blame] | 869 | int ip6_local_out_sk(struct sock *sk, struct sk_buff *skb); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 870 | int ip6_local_out(struct sk_buff *skb); |
Herbert Xu | ef76bc2 | 2008-01-11 19:15:08 -0800 | [diff] [blame] | 871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | /* |
| 873 | * Extension header (options) processing |
| 874 | */ |
| 875 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 876 | void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
| 877 | u8 *proto, struct in6_addr **daddr_p); |
| 878 | void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, |
| 879 | u8 *proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 881 | int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp, |
| 882 | __be16 *frag_offp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 884 | bool ipv6_ext_hdr(u8 nexthdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Jesse Gross | f8f6267 | 2012-11-09 17:05:07 -0800 | [diff] [blame] | 886 | enum { |
Ansis Atteka | 9195bb8 | 2012-11-09 17:11:31 -0800 | [diff] [blame] | 887 | IP6_FH_F_FRAG = (1 << 0), |
| 888 | IP6_FH_F_AUTH = (1 << 1), |
| 889 | IP6_FH_F_SKIP_RH = (1 << 2), |
Jesse Gross | f8f6267 | 2012-11-09 17:05:07 -0800 | [diff] [blame] | 890 | }; |
| 891 | |
| 892 | /* find specified header and get offset to it */ |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 893 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target, |
| 894 | unsigned short *fragoff, int *fragflg); |
Jesse Gross | f8f6267 | 2012-11-09 17:05:07 -0800 | [diff] [blame] | 895 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 896 | int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
Masahide NAKAMURA | c61a404 | 2006-08-23 19:18:35 -0700 | [diff] [blame] | 897 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 898 | struct in6_addr *fl6_update_dst(struct flowi6 *fl6, |
| 899 | const struct ipv6_txoptions *opt, |
| 900 | struct in6_addr *orig); |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 901 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | /* |
| 903 | * socket options (ipv6_sockglue.c) |
| 904 | */ |
| 905 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 906 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
| 907 | char __user *optval, unsigned int optlen); |
| 908 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
| 909 | char __user *optval, int __user *optlen); |
| 910 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, |
| 911 | char __user *optval, unsigned int optlen); |
| 912 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, |
| 913 | char __user *optval, int __user *optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 915 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len); |
Hannes Frederic Sowa | 82b276c | 2014-01-20 05:16:39 +0100 | [diff] [blame] | 916 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr, |
| 917 | int addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Hannes Frederic Sowa | 85fbaa7 | 2013-11-23 00:46:12 +0100 | [diff] [blame] | 919 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
| 920 | int *addr_len); |
| 921 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, |
| 922 | int *addr_len); |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 923 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
| 924 | u32 info, u8 *payload); |
| 925 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info); |
| 926 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 928 | int inet6_release(struct socket *sock); |
| 929 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); |
| 930 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, |
| 931 | int peer); |
| 932 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 934 | int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
Arnaldo Carvalho de Melo | d8313f5 | 2005-12-13 23:25:44 -0800 | [diff] [blame] | 935 | struct sock *sk); |
| 936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | /* |
| 938 | * reassembly.c |
| 939 | */ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 940 | extern const struct proto_ops inet6_stream_ops; |
| 941 | extern const struct proto_ops inet6_dgram_ops; |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 942 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 943 | struct group_source_req; |
| 944 | struct group_filter; |
| 945 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 946 | int ip6_mc_source(int add, int omode, struct sock *sk, |
| 947 | struct group_source_req *pgsr); |
| 948 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); |
| 949 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
| 950 | struct group_filter __user *optval, int __user *optlen); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 951 | |
| 952 | #ifdef CONFIG_PROC_FS |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 953 | int ac6_proc_init(struct net *net); |
| 954 | void ac6_proc_exit(struct net *net); |
| 955 | int raw6_proc_init(void); |
| 956 | void raw6_proc_exit(void); |
| 957 | int tcp6_proc_init(struct net *net); |
| 958 | void tcp6_proc_exit(struct net *net); |
| 959 | int udp6_proc_init(struct net *net); |
| 960 | void udp6_proc_exit(struct net *net); |
| 961 | int udplite6_proc_init(void); |
| 962 | void udplite6_proc_exit(void); |
| 963 | int ipv6_misc_proc_init(void); |
| 964 | void ipv6_misc_proc_exit(void); |
| 965 | int snmp6_register_dev(struct inet6_dev *idev); |
| 966 | int snmp6_unregister_dev(struct inet6_dev *idev); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 967 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 968 | #else |
Daniel Lezcano | 6ab57e7 | 2008-03-26 16:52:32 -0700 | [diff] [blame] | 969 | static inline int ac6_proc_init(struct net *net) { return 0; } |
| 970 | static inline void ac6_proc_exit(struct net *net) { } |
| 971 | static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; } |
| 972 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; } |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 973 | #endif |
| 974 | |
| 975 | #ifdef CONFIG_SYSCTL |
Joe Perches | 9e8cda3 | 2013-06-13 19:37:53 -0700 | [diff] [blame] | 976 | extern struct ctl_table ipv6_route_table_template[]; |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 977 | |
Joe Perches | 5c3a0fd | 2013-09-21 10:22:42 -0700 | [diff] [blame] | 978 | struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); |
| 979 | struct ctl_table *ipv6_route_sysctl_init(struct net *net); |
| 980 | int ipv6_sysctl_register(void); |
| 981 | void ipv6_sysctl_unregister(void); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 982 | #endif |
| 983 | |
Madhu Challa | 46a4dee | 2015-02-25 09:58:34 -0800 | [diff] [blame] | 984 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
| 985 | const struct in6_addr *addr); |
Madhu Challa | 46a4dee | 2015-02-25 09:58:34 -0800 | [diff] [blame] | 986 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
| 987 | const struct in6_addr *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | #endif /* _NET_IPV6_H */ |