release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/sysroot/usr/include/linux/netfilter_ipv6/ip6_tables.h

   1 /*
   2  * 25-Jul-1998 Major changes to allow for ip chain table
   3  *
   4  * 3-Jan-2000 Named tables to allow packet selection for different uses.
   5  */
   6
   7 /*
   8  *      Format of an IP6 firewall descriptor
   9  *
  10  *      src, dst, src_mask, dst_mask are always stored in network byte order.
  11  *      flags are stored in host byte order (of course).
  12  *      Port numbers are stored in HOST byte order.
  13  */
  14
  15 #ifndef _IP6_TABLES_H
  16 #define _IP6_TABLES_H
  17
  18 #include <linux/types.h>
  19
  20 #include <linux/netfilter_ipv6.h>
  21
  22 #include <linux/netfilter/x_tables.h>
  23
  24 #define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
  25 #define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
  26
  27 #define ip6t_match xt_match
  28 #define ip6t_target xt_target
  29 #define ip6t_table xt_table
  30 #define ip6t_get_revision xt_get_revision
  31
  32 /* Yes, Virginia, you have to zero the padding. */
  33 struct ip6t_ip6 {
  34         /* Source and destination IP6 addr */
  35         struct in6_addr src, dst;
  36         /* Mask for src and dest IP6 addr */
  37         struct in6_addr smsk, dmsk;
  38         char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
  39         unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
  40
  41         /* Upper protocol number
  42          * - The allowed value is 0 (any) or protocol number of last parsable
  43          *   header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
  44          *   the non IPv6 extension headers.
  45          * - The protocol numbers of IPv6 extension headers except of ESP and
  46          *   MH do not match any packets.
  47          * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
  48          */
  49         u_int16_t proto;
  50         /* TOS to match iff flags & IP6T_F_TOS */
  51         u_int8_t tos;
  52
  53         /* Flags word */
  54         u_int8_t flags;
  55         /* Inverse flags */
  56         u_int8_t invflags;
  57 };
  58
  59 #define ip6t_entry_match xt_entry_match
  60 #define ip6t_entry_target xt_entry_target
  61 #define ip6t_standard_target xt_standard_target
  62
  63 #define ip6t_counters   xt_counters
  64
  65 /* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
  66 #define IP6T_F_PROTO            0x01    /* Set if rule cares about upper
  67                                            protocols */
  68 #define IP6T_F_TOS              0x02    /* Match the TOS. */
  69 #define IP6T_F_GOTO             0x04    /* Set if jump is a goto */
  70 #define IP6T_F_MASK             0x07    /* All possible flag bits mask. */
  71
  72 /* Values for "inv" field in struct ip6t_ip6. */
  73 #define IP6T_INV_VIA_IN         0x01    /* Invert the sense of IN IFACE. */
  74 #define IP6T_INV_VIA_OUT                0x02    /* Invert the sense of OUT IFACE */
  75 #define IP6T_INV_TOS            0x04    /* Invert the sense of TOS. */
  76 #define IP6T_INV_SRCIP          0x08    /* Invert the sense of SRC IP. */
  77 #define IP6T_INV_DSTIP          0x10    /* Invert the sense of DST OP. */
  78 #define IP6T_INV_FRAG           0x20    /* Invert the sense of FRAG. */
  79 #define IP6T_INV_PROTO          XT_INV_PROTO
  80 #define IP6T_INV_MASK           0x7F    /* All possible flag bits mask. */
  81
  82 /* This structure defines each of the firewall rules.  Consists of 3
  83    parts which are 1) general IP header stuff 2) match specific
  84    stuff 3) the target to perform if the rule matches */
  85 struct ip6t_entry {
  86         struct ip6t_ip6 ipv6;
  87
  88         /* Mark with fields that we care about. */
  89         unsigned int nfcache;
  90
  91         /* Size of ipt_entry + matches */
  92         u_int16_t target_offset;
  93         /* Size of ipt_entry + matches + target */
  94         u_int16_t next_offset;
  95
  96         /* Back pointer */
  97         unsigned int comefrom;
  98
  99         /* Packet and byte counters. */
 100         struct xt_counters counters;
 101
 102         /* The matches (if any), then the target. */
 103         unsigned char elems[0];
 104 };
 105
 106 /* Standard entry */
 107 struct ip6t_standard {
 108         struct ip6t_entry entry;
 109         struct ip6t_standard_target target;
 110 };
 111
 112 struct ip6t_error_target {
 113         struct ip6t_entry_target target;
 114         char errorname[IP6T_FUNCTION_MAXNAMELEN];
 115 };
 116
 117 struct ip6t_error {
 118         struct ip6t_entry entry;
 119         struct ip6t_error_target target;
 120 };
 121
 122 #define IP6T_ENTRY_INIT(__size)                                                \
 123 {                                                                              \
 124         .target_offset  = sizeof(struct ip6t_entry),                           \
 125         .next_offset    = (__size),                                            \
 126 }
 127
 128 #define IP6T_STANDARD_INIT(__verdict)                                          \
 129 {                                                                              \
 130         .entry          = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)),       \
 131         .target         = XT_TARGET_INIT(IP6T_STANDARD_TARGET,                 \
 132                                          sizeof(struct ip6t_standard_target)), \
 133         .target.verdict = -(__verdict) - 1,                                    \
 134 }
 135
 136 #define IP6T_ERROR_INIT                                                        \
 137 {                                                                              \
 138         .entry          = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)),          \
 139         .target         = XT_TARGET_INIT(IP6T_ERROR_TARGET,                    \
 140                                          sizeof(struct ip6t_error_target)),    \
 141         .target.errorname = "ERROR",                                           \
 142 }
 143
 144 /*
 145  * New IP firewall options for [gs]etsockopt at the RAW IP level.
 146  * Unlike BSD Linux inherits IP options so you don't have to use
 147  * a raw socket for this. Instead we check rights in the calls.
 148  *
 149  * ATTENTION: check linux/in6.h before adding new number here.
 150  */
 151 #define IP6T_BASE_CTL                   64
 152
 153 #define IP6T_SO_SET_REPLACE             (IP6T_BASE_CTL)
 154 #define IP6T_SO_SET_ADD_COUNTERS        (IP6T_BASE_CTL + 1)
 155 #define IP6T_SO_SET_MAX                 IP6T_SO_SET_ADD_COUNTERS
 156
 157 #define IP6T_SO_GET_INFO                (IP6T_BASE_CTL)
 158 #define IP6T_SO_GET_ENTRIES             (IP6T_BASE_CTL + 1)
 159 #define IP6T_SO_GET_REVISION_MATCH      (IP6T_BASE_CTL + 4)
 160 #define IP6T_SO_GET_REVISION_TARGET     (IP6T_BASE_CTL + 5)
 161 #define IP6T_SO_GET_MAX                 IP6T_SO_GET_REVISION_TARGET
 162
 163 /* CONTINUE verdict for targets */
 164 #define IP6T_CONTINUE XT_CONTINUE
 165
 166 /* For standard target */
 167 #define IP6T_RETURN XT_RETURN
 168
 169 /* TCP/UDP matching stuff */
 170 #include <linux/netfilter/xt_tcpudp.h>
 171
 172 #define ip6t_tcp xt_tcp
 173 #define ip6t_udp xt_udp
 174
 175 /* Values for "inv" field in struct ipt_tcp. */
 176 #define IP6T_TCP_INV_SRCPT      XT_TCP_INV_SRCPT
 177 #define IP6T_TCP_INV_DSTPT      XT_TCP_INV_DSTPT
 178 #define IP6T_TCP_INV_FLAGS      XT_TCP_INV_FLAGS
 179 #define IP6T_TCP_INV_OPTION     XT_TCP_INV_OPTION
 180 #define IP6T_TCP_INV_MASK       XT_TCP_INV_MASK
 181
 182 /* Values for "invflags" field in struct ipt_udp. */
 183 #define IP6T_UDP_INV_SRCPT      XT_UDP_INV_SRCPT
 184 #define IP6T_UDP_INV_DSTPT      XT_UDP_INV_DSTPT
 185 #define IP6T_UDP_INV_MASK       XT_UDP_INV_MASK
 186
 187 /* ICMP matching stuff */
 188 struct ip6t_icmp {
 189         u_int8_t type;                          /* type to match */
 190         u_int8_t code[2];                       /* range of code */
 191         u_int8_t invflags;                      /* Inverse flags */
 192 };
 193
 194 /* Values for "inv" field for struct ipt_icmp. */
 195 #define IP6T_ICMP_INV   0x01    /* Invert the sense of type/code test */
 196
 197 /* The argument to IP6T_SO_GET_INFO */
 198 struct ip6t_getinfo {
 199         /* Which table: caller fills this in. */
 200         char name[IP6T_TABLE_MAXNAMELEN];
 201
 202         /* Kernel fills these in. */
 203         /* Which hook entry points are valid: bitmask */
 204         unsigned int valid_hooks;
 205
 206         /* Hook entry points: one per netfilter hook. */
 207         unsigned int hook_entry[NF_INET_NUMHOOKS];
 208
 209         /* Underflow points. */
 210         unsigned int underflow[NF_INET_NUMHOOKS];
 211
 212         /* Number of entries */
 213         unsigned int num_entries;
 214
 215         /* Size of entries. */
 216         unsigned int size;
 217 };
 218
 219 /* The argument to IP6T_SO_SET_REPLACE. */
 220 struct ip6t_replace {
 221         /* Which table. */
 222         char name[IP6T_TABLE_MAXNAMELEN];
 223
 224         /* Which hook entry points are valid: bitmask.  You can't
 225            change this. */
 226         unsigned int valid_hooks;
 227
 228         /* Number of entries */
 229         unsigned int num_entries;
 230
 231         /* Total size of new entries */
 232         unsigned int size;
 233
 234         /* Hook entry points. */
 235         unsigned int hook_entry[NF_INET_NUMHOOKS];
 236
 237         /* Underflow points. */
 238         unsigned int underflow[NF_INET_NUMHOOKS];
 239
 240         /* Information about old entries: */
 241         /* Number of counters (must be equal to current number of entries). */
 242         unsigned int num_counters;
 243         /* The old entries' counters. */
 244         struct xt_counters *counters;
 245
 246         /* The entries (hang off end: not really an array). */
 247         struct ip6t_entry entries[0];
 248 };
 249
 250 /* The argument to IP6T_SO_ADD_COUNTERS. */
 251 #define ip6t_counters_info xt_counters_info
 252
 253 /* The argument to IP6T_SO_GET_ENTRIES. */
 254 struct ip6t_get_entries {
 255         /* Which table: user fills this in. */
 256         char name[IP6T_TABLE_MAXNAMELEN];
 257
 258         /* User fills this in: total entry size. */
 259         unsigned int size;
 260
 261         /* The entries. */
 262         struct ip6t_entry entrytable[0];
 263 };
 264
 265 /* Standard return verdict, or do jump. */
 266 #define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
 267 /* Error verdict. */
 268 #define IP6T_ERROR_TARGET XT_ERROR_TARGET
 269
 270 /* Helper functions */
 271 static __inline__ struct ip6t_entry_target *
 272 ip6t_get_target(struct ip6t_entry *e)
 273 {
 274         return (void *)e + e->target_offset;
 275 }
 276
 277 /* fn returns 0 to continue iteration */
 278 #define IP6T_MATCH_ITERATE(e, fn, args...) \
 279         XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
 280
 281 /* fn returns 0 to continue iteration */
 282 #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
 283         XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
 284
 285 /*
 286  *      Main firewall chains definitions and global var's definitions.
 287  */
 288
 289 #endif /* _IP6_TABLES_H */