+++ /dev/null
-/*
- * 25-Jul-1998 Major changes to allow for ip chain table
- *
- * 3-Jan-2000 Named tables to allow packet selection for different uses.
- */
-
-/*
- * Format of an IP firewall descriptor
- *
- * src, dst, src_mask, dst_mask are always stored in network byte order.
- * flags are stored in host byte order (of course).
- * Port numbers are stored in HOST byte order.
- */
-
-#ifndef _IPTABLES_H
-#define _IPTABLES_H
-
-#include <linux/netfilter_ipv4.h>
-
-#define IPT_FUNCTION_MAXNAMELEN 30
-#define IPT_TABLE_MAXNAMELEN 32
-
-/* Yes, Virginia, you have to zero the padding. */
-struct ipt_ip {
- /* Source and destination IP addr */
- struct in_addr src, dst;
- /* Mask for src and dest IP addr */
- struct in_addr smsk, dmsk;
- char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
- unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
-
- /* Protocol, 0 = ANY */
- u_int16_t proto;
-
- /* Flags word */
- u_int8_t flags;
- /* Inverse flags */
- u_int8_t invflags;
-};
-
-struct ipt_entry_match
-{
- union {
- struct {
- u_int16_t match_size;
-
- /* Used by userspace */
- char name[IPT_FUNCTION_MAXNAMELEN-1];
-
- u_int8_t revision;
- } user;
- struct {
- u_int16_t match_size;
-
- /* Used inside the kernel */
- struct ipt_match *match;
- } kernel;
-
- /* Total length */
- u_int16_t match_size;
- } u;
-
- unsigned char data[0];
-};
-
-struct ipt_entry_target
-{
- union {
- struct {
- u_int16_t target_size;
-
- /* Used by userspace */
- char name[IPT_FUNCTION_MAXNAMELEN-1];
-
- u_int8_t revision;
- } user;
- struct {
- u_int16_t target_size;
-
- /* Used inside the kernel */
- struct ipt_target *target;
- } kernel;
-
- /* Total length */
- u_int16_t target_size;
- } u;
-
- unsigned char data[0];
-};
-
-struct ipt_standard_target
-{
- struct ipt_entry_target target;
- int verdict;
-};
-
-struct ipt_counters
-{
- u_int64_t pcnt, bcnt; /* Packet and byte counters */
-};
-
-/* Values for "flag" field in struct ipt_ip (general ip structure). */
-#define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */
-#define IPT_F_MASK 0x01 /* All possible flag bits mask. */
-
-/* Values for "inv" field in struct ipt_ip. */
-#define IPT_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
-#define IPT_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
-#define IPT_INV_TOS 0x04 /* Invert the sense of TOS. */
-#define IPT_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
-#define IPT_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
-#define IPT_INV_FRAG 0x20 /* Invert the sense of FRAG. */
-#define IPT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
-#define IPT_INV_MASK 0x7F /* All possible flag bits mask. */
-
-/* This structure defines each of the firewall rules. Consists of 3
- parts which are 1) general IP header stuff 2) match specific
- stuff 3) the target to perform if the rule matches */
-struct ipt_entry
-{
- struct ipt_ip ip;
-
- /* Mark with fields that we care about. */
- unsigned int nfcache;
-
- /* Size of ipt_entry + matches */
- u_int16_t target_offset;
- /* Size of ipt_entry + matches + target */
- u_int16_t next_offset;
-
- /* Back pointer */
- unsigned int comefrom;
-
- /* Packet and byte counters. */
- struct ipt_counters counters;
-
- /* The matches (if any), then the target. */
- unsigned char elems[0];
-};
-
-/*
- * New IP firewall options for [gs]etsockopt at the RAW IP level.
- * Unlike BSD Linux inherits IP options so you don't have to use a raw
- * socket for this. Instead we check rights in the calls. */
-#define IPT_BASE_CTL 64 /* base for firewall socket options */
-
-#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
-#define IPT_SO_SET_ADD_COUNTERS (IPT_BASE_CTL + 1)
-#define IPT_SO_SET_MAX IPT_SO_SET_ADD_COUNTERS
-
-#define IPT_SO_GET_INFO (IPT_BASE_CTL)
-#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)
-#define IPT_SO_GET_REVISION_MATCH (IPT_BASE_CTL + 2)
-#define IPT_SO_GET_REVISION_TARGET (IPT_BASE_CTL + 3)
-#define IPT_SO_GET_MAX IPT_SO_GET_REVISION_TARGET
-
-/* CONTINUE verdict for targets */
-#define IPT_CONTINUE 0xFFFFFFFF
-
-/* For standard target */
-#define IPT_RETURN (-NF_MAX_VERDICT - 1)
-
-/* TCP matching stuff */
-struct ipt_tcp
-{
- u_int16_t spts[2]; /* Source port range. */
- u_int16_t dpts[2]; /* Destination port range. */
- u_int8_t option; /* TCP Option iff non-zero*/
- u_int8_t flg_mask; /* TCP flags mask byte */
- u_int8_t flg_cmp; /* TCP flags compare byte */
- u_int8_t invflags; /* Inverse flags */
-};
-
-/* Values for "inv" field in struct ipt_tcp. */
-#define IPT_TCP_INV_SRCPT 0x01 /* Invert the sense of source ports. */
-#define IPT_TCP_INV_DSTPT 0x02 /* Invert the sense of dest ports. */
-#define IPT_TCP_INV_FLAGS 0x04 /* Invert the sense of TCP flags. */
-#define IPT_TCP_INV_OPTION 0x08 /* Invert the sense of option test. */
-#define IPT_TCP_INV_MASK 0x0F /* All possible flags. */
-
-/* UDP matching stuff */
-struct ipt_udp
-{
- u_int16_t spts[2]; /* Source port range. */
- u_int16_t dpts[2]; /* Destination port range. */
- u_int8_t invflags; /* Inverse flags */
-};
-
-/* Values for "invflags" field in struct ipt_udp. */
-#define IPT_UDP_INV_SRCPT 0x01 /* Invert the sense of source ports. */
-#define IPT_UDP_INV_DSTPT 0x02 /* Invert the sense of dest ports. */
-#define IPT_UDP_INV_MASK 0x03 /* All possible flags. */
-
-/* ICMP matching stuff */
-struct ipt_icmp
-{
- u_int8_t type; /* type to match */
- u_int8_t code[2]; /* range of code */
- u_int8_t invflags; /* Inverse flags */
-};
-
-/* Values for "inv" field for struct ipt_icmp. */
-#define IPT_ICMP_INV 0x01 /* Invert the sense of type/code test */
-
-/* The argument to IPT_SO_GET_INFO */
-struct ipt_getinfo
-{
- /* Which table: caller fills this in. */
- char name[IPT_TABLE_MAXNAMELEN];
-
- /* Kernel fills these in. */
- /* Which hook entry points are valid: bitmask */
- unsigned int valid_hooks;
-
- /* Hook entry points: one per netfilter hook. */
- unsigned int hook_entry[NF_IP_NUMHOOKS];
-
- /* Underflow points. */
- unsigned int underflow[NF_IP_NUMHOOKS];
-
- /* Number of entries */
- unsigned int num_entries;
-
- /* Size of entries. */
- unsigned int size;
-};
-
-/* The argument to IPT_SO_SET_REPLACE. */
-struct ipt_replace
-{
- /* Which table. */
- char name[IPT_TABLE_MAXNAMELEN];
-
- /* Which hook entry points are valid: bitmask. You can't
- change this. */
- unsigned int valid_hooks;
-
- /* Number of entries */
- unsigned int num_entries;
-
- /* Total size of new entries */
- unsigned int size;
-
- /* Hook entry points. */
- unsigned int hook_entry[NF_IP_NUMHOOKS];
-
- /* Underflow points. */
- unsigned int underflow[NF_IP_NUMHOOKS];
-
- /* Information about old entries: */
- /* Number of counters (must be equal to current number of entries). */
- unsigned int num_counters;
-
- /* The old entries' counters. */
- struct ipt_counters *counters;
-
- /* The entries (hang off end: not really an array). */
- struct ipt_entry entries[0];
-};
-
-/* The argument to IPT_SO_ADD_COUNTERS. */
-struct ipt_counters_info
-{
- /* Which table. */
- char name[IPT_TABLE_MAXNAMELEN];
-
- unsigned int num_counters;
-
- /* The counters (actually `number' of these). */
- struct ipt_counters counters[0];
-};
-
-/* The argument to IPT_SO_GET_ENTRIES. */
-struct ipt_get_entries
-{
- /* Which table: user fills this in. */
- char name[IPT_TABLE_MAXNAMELEN];
-
- /* User fills this in: total entry size. */
- unsigned int size;
-
- /* The entries. */
- struct ipt_entry entrytable[0];
-};
-
-/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
- * kernel supports, if >= revision. */
-struct ipt_get_revision
-{
- char name[IPT_FUNCTION_MAXNAMELEN-1];
-
- u_int8_t revision;
-};
-
-/* Standard return verdict, or do jump. */
-#define IPT_STANDARD_TARGET ""
-/* Error verdict. */
-#define IPT_ERROR_TARGET "ERROR"
-
-/* Helper functions */
-static __inline__ struct ipt_entry_target *
-ipt_get_target(struct ipt_entry *e)
-{
- return (void *)e + e->target_offset;
-}
-
-/* fn returns 0 to continue iteration */
-#define IPT_MATCH_ITERATE(e, fn, args...) \
-({ \
- unsigned int __i; \
- int __ret = 0; \
- struct ipt_entry_match *__match; \
- \
- for (__i = sizeof(struct ipt_entry); \
- __i < (e)->target_offset; \
- __i += __match->u.match_size) { \
- __match = (void *)(e) + __i; \
- \
- __ret = fn(__match , ## args); \
- if (__ret != 0) \
- break; \
- } \
- __ret; \
-})
-
-/* fn returns 0 to continue iteration */
-#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \
-({ \
- unsigned int __i; \
- int __ret = 0; \
- struct ipt_entry *__entry; \
- \
- for (__i = 0; __i < (size); __i += __entry->next_offset) { \
- __entry = (void *)(entries) + __i; \
- \
- __ret = fn(__entry , ## args); \
- if (__ret != 0) \
- break; \
- } \
- __ret; \
-})
-
-/*
- * Main firewall chains definitions and global var's definitions.
- */
-#endif /* _IPTABLES_H */
git://git.onelab.eu / iproute2.git / blobdiff