eliminating unnecessary definitions and adopting to new features. by this patch, ip_tables.h will caontain the necessary definitions that are required by iptablestng to implement ipv4 tables. diff --git a/include/linux/netfilter_ipv4/ip_tables.h b/include/linux/netfilter_ipv4/ip_tables.h index bfc889f..f133037 100644 --- a/include/linux/netfilter_ipv4/ip_tables.h +++ b/include/linux/netfilter_ipv4/ip_tables.h @@ -1,15 +1,6 @@ -/* - * 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 +/* Packet Tables Code - IP4 part * - * 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. + * Copyright (C) 2005-2008 Hamid Jafarian(hm.t.) <hamid.jafarian@xxxxxxxxx> */ #ifndef _IPTABLES_H @@ -21,8 +12,9 @@ #include <linux/in.h> #include <linux/ip.h> #include <linux/skbuff.h> -#endif #include <linux/compiler.h> +#endif + #include <linux/netfilter_ipv4.h> #include <linux/netfilter/x_tables.h> @@ -51,12 +43,13 @@ struct ipt_ip { /* Inverse flags */ u_int8_t invflags; }; +#include <linux/netfilter/pkt_tables.h> #define ipt_entry_match xt_entry_match #define ipt_entry_target xt_entry_target #define ipt_standard_target xt_standard_target -#define ipt_counters xt_counters +#define ipt_counters pktt_counters /* Values for "flag" field in struct ipt_ip (general ip structure). */ #define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */ @@ -73,30 +66,24 @@ struct ipt_ip { #define IPT_INV_PROTO XT_INV_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; +#define ipt_entry pktt_entry - /* Size of ipt_entry + matches */ - u_int16_t target_offset; - /* Size of ipt_entry + matches + target */ - u_int16_t next_offset; +#define IP4_SRCIP(skb) (ip_hdr(skb)->saddr) +#define IP4_DSTIP(skb) (ip_hdr(skb)->daddr) +#define IP4_PROTO(skb) (ip_hdr(skb)->protocol) - /* Back pointer */ - unsigned int comefrom; +#define IP4_TOTLEN(skb)(ntohs(ip_hdr(skb)->tot_len)) +#define IP4_PROTOFF(skb)(ip_hdr(skb)->ihl * 4) +#define IP4_OFFSET(skb) (ntohs(ip_hdr(skb)->frag_off) & IP_OFFSET) - /* Packet and byte counters. */ - struct xt_counters counters; - - /* The matches (if any), then the target. */ - unsigned char elems[0]; -}; +#define IP4_CHECK_FRAGMENT(ip, offset) \ +({ \ + int __ret = 0; \ + if( (( (ip).flags & IPT_F_FRAG ) && !offset) /*he can't match*/ \ + /* but if INV */ ^ !!((ip).invflags & IPT_INV_FRAG) ) \ + __ret = NF_MAX_VERDICT +2; \ + __ret; \ +}) /* * New IP firewall options for [gs]etsockopt at the RAW IP level. @@ -117,8 +104,8 @@ struct ipt_entry #define IPT_SO_GET_REVISION_TARGET (IPT_BASE_CTL + 3) #define IPT_SO_GET_MAX IPT_SO_GET_REVISION_TARGET -#define IPT_CONTINUE XT_CONTINUE -#define IPT_RETURN XT_RETURN +#define IPT_CONTINUE PKTT_CONTINUE +#define IPT_RETURN PKTT_RETURN #include <linux/netfilter/xt_tcpudp.h> #define ipt_udp xt_udp @@ -145,96 +132,19 @@ struct ipt_icmp /* 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_INET_NUMHOOKS]; - - /* Underflow points. */ - unsigned int underflow[NF_INET_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_INET_NUMHOOKS]; - - /* Underflow points. */ - unsigned int underflow[NF_INET_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 xt_counters __user *counters; - - /* The entries (hang off end: not really an array). */ - struct ipt_entry entries[0]; -}; - /* The argument to IPT_SO_ADD_COUNTERS. */ #define ipt_counters_info xt_counters_info -/* 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]; -}; - /* Standard return verdict, or do jump. */ #define IPT_STANDARD_TARGET XT_STANDARD_TARGET /* Error verdict. */ #define IPT_ERROR_TARGET XT_ERROR_TARGET /* Helper functions */ -static __inline__ struct ipt_entry_target * -ipt_get_target(struct ipt_entry *e) -{ - return (void *)e + e->target_offset; -} +#define ipt_get_target(e) pktt_entry_get_target(e) -/* fn returns 0 to continue iteration */ -#define IPT_MATCH_ITERATE(e, fn, args...) \ - XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \ - XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args) +#define IPT_MATCH_ITERATE(e, fn, args...) \ + PKTT_ENTRY_MATCH_ITERATE(e, fn, ## args) /* * Main firewall chains definitions and global var's definitions. @@ -244,96 +154,7 @@ ipt_get_target(struct ipt_entry *e) #include <linux/init.h> extern void ipt_init(void) __init; -extern struct xt_table *ipt_register_table(struct net *net, - struct xt_table *table, - const struct ipt_replace *repl); -extern void ipt_unregister_table(struct xt_table *table); - -/* Standard entry. */ -struct ipt_standard -{ - struct ipt_entry entry; - struct ipt_standard_target target; -}; - -struct ipt_error_target -{ - struct ipt_entry_target target; - char errorname[IPT_FUNCTION_MAXNAMELEN]; -}; - -struct ipt_error -{ - struct ipt_entry entry; - struct ipt_error_target target; -}; - -#define IPT_ENTRY_INIT(__size) \ -{ \ - .target_offset = sizeof(struct ipt_entry), \ - .next_offset = (__size), \ -} - -#define IPT_STANDARD_INIT(__verdict) \ -{ \ - .entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \ - .target = XT_TARGET_INIT(IPT_STANDARD_TARGET, \ - sizeof(struct xt_standard_target)), \ - .target.verdict = -(__verdict) - 1, \ -} - -#define IPT_ERROR_INIT \ -{ \ - .entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \ - .target = XT_TARGET_INIT(IPT_ERROR_TARGET, \ - sizeof(struct ipt_error_target)), \ - .target.errorname = "ERROR", \ -} - -extern unsigned int ipt_do_table(struct sk_buff *skb, - unsigned int hook, - const struct net_device *in, - const struct net_device *out, - struct xt_table *table); - #define IPT_ALIGN(s) XT_ALIGN(s) -#ifdef CONFIG_COMPAT -#include <net/compat.h> - -struct compat_ipt_entry -{ - struct ipt_ip ip; - compat_uint_t nfcache; - u_int16_t target_offset; - u_int16_t next_offset; - compat_uint_t comefrom; - struct compat_xt_counters counters; - unsigned char elems[0]; -}; - -/* Helper functions */ -static inline struct ipt_entry_target * -compat_ipt_get_target(struct compat_ipt_entry *e) -{ - return (void *)e + e->target_offset; -} - -#define COMPAT_IPT_ALIGN(s) COMPAT_XT_ALIGN(s) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_MATCH_ITERATE(e, fn, args...) \ - XT_MATCH_ITERATE(struct compat_ipt_entry, e, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_ENTRY_ITERATE(entries, size, fn, args...) \ - XT_ENTRY_ITERATE(struct compat_ipt_entry, entries, size, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \ - XT_ENTRY_ITERATE_CONTINUE(struct compat_ipt_entry, entries, size, n, \ - fn, ## args) - -#endif /* CONFIG_COMPAT */ #endif /*__KERNEL__*/ #endif /* _IPTABLES_H */ -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html