diff options
Diffstat (limited to 'net/ipv4/netfilter/ipt_connbytes.c')
| -rw-r--r-- | net/ipv4/netfilter/ipt_connbytes.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/net/ipv4/netfilter/ipt_connbytes.c b/net/ipv4/netfilter/ipt_connbytes.c deleted file mode 100644 index d68a048b7176..000000000000 --- a/net/ipv4/netfilter/ipt_connbytes.c +++ /dev/null @@ -1,161 +0,0 @@ -/* Kernel module to match connection tracking byte counter. - * GPL (C) 2002 Martin Devera (devik@cdi.cz). - * - * 2004-07-20 Harald Welte <laforge@netfilter.org> - * - reimplemented to use per-connection accounting counters - * - add functionality to match number of packets - * - add functionality to match average packet size - * - add support to match directions seperately - * - */ -#include <linux/module.h> -#include <linux/skbuff.h> -#include <net/netfilter/nf_conntrack_compat.h> -#include <linux/netfilter_ipv4/ip_tables.h> -#include <linux/netfilter_ipv4/ipt_connbytes.h> - -#include <asm/div64.h> -#include <asm/bitops.h> - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); -MODULE_DESCRIPTION("iptables match for matching number of pkts/bytes per connection"); - -/* 64bit divisor, dividend and result. dynamic precision */ -static u_int64_t div64_64(u_int64_t dividend, u_int64_t divisor) -{ - u_int32_t d = divisor; - - if (divisor > 0xffffffffULL) { - unsigned int shift = fls(divisor >> 32); - - d = divisor >> shift; - dividend >>= shift; - } - - do_div(dividend, d); - return dividend; -} - -static int -match(const struct sk_buff *skb, - const struct net_device *in, - const struct net_device *out, - const void *matchinfo, - int offset, - int *hotdrop) -{ - const struct ipt_connbytes_info *sinfo = matchinfo; - u_int64_t what = 0; /* initialize to make gcc happy */ - const struct ip_conntrack_counter *counters; - - if (!(counters = nf_ct_get_counters(skb))) - return 0; /* no match */ - - switch (sinfo->what) { - case IPT_CONNBYTES_PKTS: - switch (sinfo->direction) { - case IPT_CONNBYTES_DIR_ORIGINAL: - what = counters[IP_CT_DIR_ORIGINAL].packets; - break; - case IPT_CONNBYTES_DIR_REPLY: - what = counters[IP_CT_DIR_REPLY].packets; - break; - case IPT_CONNBYTES_DIR_BOTH: - what = counters[IP_CT_DIR_ORIGINAL].packets; - what += counters[IP_CT_DIR_REPLY].packets; - break; - } - break; - case IPT_CONNBYTES_BYTES: - switch (sinfo->direction) { - case IPT_CONNBYTES_DIR_ORIGINAL: - what = counters[IP_CT_DIR_ORIGINAL].bytes; - break; - case IPT_CONNBYTES_DIR_REPLY: - what = counters[IP_CT_DIR_REPLY].bytes; - break; - case IPT_CONNBYTES_DIR_BOTH: - what = counters[IP_CT_DIR_ORIGINAL].bytes; - what += counters[IP_CT_DIR_REPLY].bytes; - break; - } - break; - case IPT_CONNBYTES_AVGPKT: - switch (sinfo->direction) { - case IPT_CONNBYTES_DIR_ORIGINAL: - what = div64_64(counters[IP_CT_DIR_ORIGINAL].bytes, - counters[IP_CT_DIR_ORIGINAL].packets); - break; - case IPT_CONNBYTES_DIR_REPLY: - what = div64_64(counters[IP_CT_DIR_REPLY].bytes, - counters[IP_CT_DIR_REPLY].packets); - break; - case IPT_CONNBYTES_DIR_BOTH: - { - u_int64_t bytes; - u_int64_t pkts; - bytes = counters[IP_CT_DIR_ORIGINAL].bytes + - counters[IP_CT_DIR_REPLY].bytes; - pkts = counters[IP_CT_DIR_ORIGINAL].packets+ - counters[IP_CT_DIR_REPLY].packets; - - /* FIXME_THEORETICAL: what to do if sum - * overflows ? */ - - what = div64_64(bytes, pkts); - } - break; - } - break; - } - - if (sinfo->count.to) - return (what <= sinfo->count.to && what >= sinfo->count.from); - else - return (what >= sinfo->count.from); -} - -static int check(const char *tablename, - const struct ipt_ip *ip, - void *matchinfo, - unsigned int matchsize, - unsigned int hook_mask) -{ - const struct ipt_connbytes_info *sinfo = matchinfo; - - if (matchsize != IPT_ALIGN(sizeof(struct ipt_connbytes_info))) - return 0; - - if (sinfo->what != IPT_CONNBYTES_PKTS && - sinfo->what != IPT_CONNBYTES_BYTES && - sinfo->what != IPT_CONNBYTES_AVGPKT) - return 0; - - if (sinfo->direction != IPT_CONNBYTES_DIR_ORIGINAL && - sinfo->direction != IPT_CONNBYTES_DIR_REPLY && - sinfo->direction != IPT_CONNBYTES_DIR_BOTH) - return 0; - - return 1; -} - -static struct ipt_match state_match = { - .name = "connbytes", - .match = &match, - .checkentry = &check, - .me = THIS_MODULE -}; - -static int __init init(void) -{ - return ipt_register_match(&state_match); -} - -static void __exit fini(void) -{ - ipt_unregister_match(&state_match); -} - -module_init(init); -module_exit(fini); |