Author: pluto Date: Wed Nov 2 22:28:49 2005 GMT
Module: SOURCES Tag: LINUX_2_6
---- Log message:
- layer7 2.0-beta.
---- Files affected:
SOURCES:
linux-2.6-nf-layer7.patch (NONE -> 1.1.2.1) (NEW)
---- Diffs:
================================================================
Index: SOURCES/linux-2.6-nf-layer7.patch
diff -u /dev/null SOURCES/linux-2.6-nf-layer7.patch:1.1.2.1
--- /dev/null Wed Nov 2 23:28:49 2005
+++ SOURCES/linux-2.6-nf-layer7.patch Wed Nov 2 23:28:44 2005
@@ -0,0 +1,2046 @@
+diff -uNr linux-2.6.14/include/linux/netfilter_ipv4.orig/ip_conntrack.h
linux-2.6.14/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux-2.6.14/include/linux/netfilter_ipv4.orig/ip_conntrack.h
2005-10-28 02:02:08.000000000 +0200
++++ linux-2.6.14/include/linux/netfilter_ipv4/ip_conntrack.h 2005-11-02
23:20:01.000000000 +0100
+@@ -253,6 +253,15 @@
+ /* Traversed often, so hopefully in different cacheline to top */
+ /* These are my tuples; original and reply */
+ struct ip_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
++
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) ||
defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++ struct {
++ char * app_proto; /* e.g. "http". NULL before decision.
"unknown" after decision if no match */
++ char * app_data; /* application layer data so far. NULL
after match decision */
++ unsigned int app_data_len;
++ } layer7;
++#endif
++
+ };
+
+ struct ip_conntrack_expect
+diff -uNr linux-2.6.14/include/linux/netfilter_ipv4.orig/ipt_layer7.h
linux-2.6.14/include/linux/netfilter_ipv4/ipt_layer7.h
+--- linux-2.6.14/include/linux/netfilter_ipv4.orig/ipt_layer7.h
1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.14/include/linux/netfilter_ipv4/ipt_layer7.h 2005-11-02
23:20:01.000000000 +0100
+@@ -0,0 +1,26 @@
++/*
++ By Matthew Strait <[EMAIL PROTECTED]>, Dec 2003.
++ http://l7-filter.sf.net
++
++ This program is free software; you can redistribute it and/or
++ modify it under the terms of the GNU General Public License
++ as published by the Free Software Foundation; either version
++ 2 of the License, or (at your option) any later version.
++ http://www.gnu.org/licenses/gpl.txt
++*/
++
++#ifndef _IPT_LAYER7_H
++#define _IPT_LAYER7_H
++
++#define MAX_PATTERN_LEN 8192
++#define MAX_PROTOCOL_LEN 256
++
++typedef char *(*proc_ipt_search) (char *, char, char *);
++
++struct ipt_layer7_info {
++ char protocol[MAX_PROTOCOL_LEN];
++ char invert:1;
++ char pattern[MAX_PATTERN_LEN];
++};
++
++#endif /* _IPT_LAYER7_H */
+diff -uNr linux-2.6.14/net/ipv4/netfilter.orig/ip_conntrack_core.c
linux-2.6.14/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux-2.6.14/net/ipv4/netfilter.orig/ip_conntrack_core.c 2005-10-28
02:02:08.000000000 +0200
++++ linux-2.6.14/net/ipv4/netfilter/ip_conntrack_core.c 2005-11-02
23:20:01.000000000 +0100
+@@ -335,6 +335,13 @@
+ * too. */
+ ip_ct_remove_expectations(ct);
+
++ #if defined(CONFIG_IP_NF_MATCH_LAYER7) ||
defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++ if(ct->layer7.app_proto)
++ kfree(ct->layer7.app_proto);
++ if(ct->layer7.app_data)
++ kfree(ct->layer7.app_data);
++ #endif
++
+ /* We overload first tuple to link into unconfirmed list. */
+ if (!is_confirmed(ct)) {
+ BUG_ON(list_empty(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list));
+diff -uNr linux-2.6.14/net/ipv4/netfilter.orig/ip_conntrack_standalone.c
linux-2.6.14/net/ipv4/netfilter/ip_conntrack_standalone.c
+--- linux-2.6.14/net/ipv4/netfilter.orig/ip_conntrack_standalone.c
2005-10-28 02:02:08.000000000 +0200
++++ linux-2.6.14/net/ipv4/netfilter/ip_conntrack_standalone.c 2005-11-02
23:20:01.000000000 +0100
+@@ -188,6 +188,12 @@
+ return -ENOSPC;
+ #endif
+
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) ||
defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++ if(conntrack->layer7.app_proto)
++ if (seq_printf(s, "l7proto=%s ",conntrack->layer7.app_proto))
++ return 1;
++#endif
++
+ if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
+ return -ENOSPC;
+
+diff -uNr linux-2.6.14/net/ipv4/netfilter.orig/ipt_layer7.c
linux-2.6.14/net/ipv4/netfilter/ipt_layer7.c
+--- linux-2.6.14/net/ipv4/netfilter.orig/ipt_layer7.c 1970-01-01
01:00:00.000000000 +0100
++++ linux-2.6.14/net/ipv4/netfilter/ipt_layer7.c 2005-11-02
23:20:01.000000000 +0100
+@@ -0,0 +1,568 @@
++/*
++ Kernel module to match application layer (OSI layer 7)
++ data in connections.
++
++ http://l7-filter.sf.net
++
++ By Matthew Strait and Ethan Sommer, 2003-2005.
++
++ This program is free software; you can redistribute it and/or
++ modify it under the terms of the GNU General Public License
++ as published by the Free Software Foundation; either version
++ 2 of the License, or (at your option) any later version.
++ http://www.gnu.org/licenses/gpl.txt
++
++ Based on ipt_string.c (C) 2000 Emmanuel Roger <[EMAIL PROTECTED]>
++ and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++#include <linux/proc_fs.h>
++#include <linux/ctype.h>
++#include <net/ip.h>
++#include <net/tcp.h>
++#include <linux/spinlock.h>
++
++#include "regexp/regexp.c"
++
++#include <linux/netfilter_ipv4/ipt_layer7.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++
++MODULE_AUTHOR("Matthew Strait <[EMAIL PROTECTED]>, Ethan Sommer <[EMAIL
PROTECTED]>");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("iptables application layer match module");
++
++static int maxdatalen = 2048; // this is the default
++module_param(maxdatalen, int, 0444);
++MODULE_PARM_DESC(maxdatalen, "maximum bytes of data looked at by l7-filter");
++
++#if defined(CONFIG_IP_NF_MATCH_LAYER7_DEBUG)
++ #define DPRINTK(format,args...) printk(format,##args)
++#else
++ #define DPRINTK(format,args...)
++#endif
++
++#define TOTAL_PACKETS master_conntrack->counters[IP_CT_DIR_ORIGINAL].packets
+ \
++ master_conntrack->counters[IP_CT_DIR_REPLY].packets
++
++/* Number of packets whose data we look at.
++This can be modified through /proc/net/layer7_numpackets */
++static int num_packets = 10;
++
++static struct pattern_cache {
++ char * regex_string;
++ regexp * pattern;
++ struct pattern_cache * next;
++} * first_pattern_cache = NULL;
++
++/* I'm new to locking. Here are my assumptions:
++
++- No one will write to /proc/net/layer7_numpackets over and over very fast;
++ if they did, nothing awful would happen.
++
++- This code will never be processing the same packet twice at the same time,
++ because iptables rules are traversed in order.
++
++- It doesn't matter if two packets from different connections are in here at
++ the same time, because they don't share any data.
++
++- It _does_ matter if two packets from the same connection are here at the
same
++ time. In this case, we have to protect the conntracks and the list of
++ compiled patterns.
++*/
++DEFINE_RWLOCK(ct_lock);
++DEFINE_SPINLOCK(list_lock);
++
++#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++/* Converts an unfriendly string into a friendly one by
++replacing unprintables with periods and all whitespace with " ". */
++static char * friendly_print(unsigned char * s)
++{
++ char * f = kmalloc(strlen(s) + 1, GFP_ATOMIC);
++ int i;
++
++ if(!f) {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
friendly_print, bailing.\n");
++ return NULL;
++ }
++
++ for(i = 0; i < strlen(s); i++){
++ if(isprint(s[i]) && s[i] < 128) f[i] = s[i];
++ else if(isspace(s[i])) f[i] = ' ';
++ else f[i] = '.';
++ }
++ f[i] = '\0';
++ return f;
++}
++
++static char dec2hex(int i)
++{
++ switch (i) {
++ case 0 ... 9:
++ return (char)(i + '0');
++ break;
++ case 10 ... 15:
++ return (char)(i - 10 + 'a');
++ break;
++ default:
++ if (net_ratelimit())
++ printk("Problem in dec2hex\n");
++ return '\0';
++ }
++}
++
++static char * hex_print(unsigned char * s)
++{
++ char * g = kmalloc(strlen(s)*3 + 1, GFP_ATOMIC);
++ int i;
++
++ if(!g) {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in hex_print,
bailing.\n");
++ return NULL;
++ }
++
++ for(i = 0; i < strlen(s); i++) {
++ g[i*3 ] = dec2hex(s[i]/16);
++ g[i*3 + 1] = dec2hex(s[i]%16);
++ g[i*3 + 2] = ' ';
++ }
++ g[i*3] = '\0';
++
++ return g;
++}
++#endif // DEBUG
++
++/* Use instead of regcomp. As we expect to be seeing the same regexps over
and
++over again, it make sense to cache the results. */
++static regexp * compile_and_cache(char * regex_string, char * protocol)
++{
++ struct pattern_cache * node = first_pattern_cache;
++ struct pattern_cache * last_pattern_cache = first_pattern_cache;
++ struct pattern_cache * tmp;
++ unsigned int len;
++
++ while (node != NULL) {
++ if (!strcmp(node->regex_string, regex_string))
++ return node->pattern;
++
++ last_pattern_cache = node;/* points at the last non-NULL node */
++ node = node->next;
++ }
++
++ /* If we reach the end of the list, then we have not yet cached
++ the pattern for this regex. Let's do that now.
++ Be paranoid about running out of memory to avoid list corruption. */
++ tmp = kmalloc(sizeof(struct pattern_cache), GFP_ATOMIC);
++
++ if(!tmp) {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
compile_and_cache, bailing.\n");
++ return NULL;
++ }
++
++ tmp->regex_string = kmalloc(strlen(regex_string) + 1, GFP_ATOMIC);
++ tmp->pattern = kmalloc(sizeof(struct regexp), GFP_ATOMIC);
++ tmp->next = NULL;
++
++ if(!tmp->regex_string || !tmp->pattern) {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
compile_and_cache, bailing.\n");
++ kfree(tmp->regex_string);
++ kfree(tmp->pattern);
++ kfree(tmp);
++ return NULL;
++ }
++
++ /* Ok. The new node is all ready now. */
++ node = tmp;
++
++ if(first_pattern_cache == NULL) /* list is empty */
++ first_pattern_cache = node; /* make node the beginning */
++ else
++ last_pattern_cache->next = node; /* attach node to the end */
++
++ /* copy the string and compile the regex */
++ len = strlen(regex_string);
++ DPRINTK("About to compile this: \"%s\"\n", regex_string);
++ node->pattern = regcomp(regex_string, &len);
++ if ( !node->pattern ) {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: Error compiling regexp \"%s\"
(%s)\n", regex_string, protocol);
++ /* pattern is now cached as NULL, so we won't try again. */
++ }
++
++ strcpy(node->regex_string, regex_string);
++ return node->pattern;
++}
++
++static int can_handle(const struct sk_buff *skb)
++{
++ if(!skb->nh.iph) /* not IP */
++ return 0;
++ if(skb->nh.iph->protocol != IPPROTO_TCP &&
++ skb->nh.iph->protocol != IPPROTO_UDP &&
++ skb->nh.iph->protocol != IPPROTO_ICMP)
++ return 0;
++ return 1;
++}
++
++/* Returns offset the into the skb->data that the application data starts */
++static int app_data_offset(const struct sk_buff *skb)
++{
++ /* In case we are ported somewhere (ebtables?) where skb->nh.iph
++ isn't set, this can be gotten from 4*(skb->data[0] & 0x0f) as well. */
++ int ip_hl = 4*skb->nh.iph->ihl;
++
++ if( skb->nh.iph->protocol == IPPROTO_TCP ) {
++ /* 12 == offset into TCP header for the header length field.
++ Can't get this with skb->h.th->doff because the tcphdr
++ struct doesn't get set when routing (this is confirmed to be
++ true in Netfilter as well as QoS.) */
++ int tcp_hl = 4*(skb->data[ip_hl + 12] >> 4);
++
++ return ip_hl + tcp_hl;
++ } else if( skb->nh.iph->protocol == IPPROTO_UDP ) {
++ return ip_hl + 8; /* UDP header is always 8 bytes */
++ } else if( skb->nh.iph->protocol == IPPROTO_ICMP ) {
++ return ip_hl + 8; /* ICMP header is 8 bytes */
++ } else {
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: tried to handle unknown
protocol!\n");
++ return ip_hl + 8; /* something reasonable */
++ }
++}
++
++/* handles whether there's a match when we aren't appending data anymore */
++static int match_no_append(struct ip_conntrack * conntrack, struct
ip_conntrack * master_conntrack,
++ enum ip_conntrack_info ctinfo, enum ip_conntrack_info
master_ctinfo,
++ struct ipt_layer7_info * info)
++{
++ /* If we're in here, throw the app data away */
++ write_lock(&ct_lock);
++ if(master_conntrack->layer7.app_data != NULL) {
++
++ #ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++ if(!master_conntrack->layer7.app_proto) {
++ char * f =
friendly_print(master_conntrack->layer7.app_data);
++ char * g = hex_print(master_conntrack->layer7.app_data);
++ DPRINTK("\nl7-filter gave up after %d bytes (%llu
packets):\n%s\n",
++ strlen(f),
++ TOTAL_PACKETS, f);
++ kfree(f);
++ DPRINTK("In hex: %s\n", g);
++ kfree(g);
++ }
++ #endif
++
++ kfree(master_conntrack->layer7.app_data);
++ master_conntrack->layer7.app_data = NULL; /* don't free again */
++ }
++ write_unlock(&ct_lock);
++
++ if(master_conntrack->layer7.app_proto){
++ /* Here child connections set their .app_proto (for
/proc/net/ip_conntrack) */
++ write_lock(&ct_lock);
++ if(!conntrack->layer7.app_proto) {
++ conntrack->layer7.app_proto =
kmalloc(strlen(master_conntrack->layer7.app_proto)+1, GFP_ATOMIC);
++ if(!conntrack->layer7.app_proto){
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory
in match_no_append, bailing.\n");
++ write_unlock(&ct_lock);
++ return 1;
++ }
++ strcpy(conntrack->layer7.app_proto,
master_conntrack->layer7.app_proto);
++ }
++ write_unlock(&ct_lock);
++
++ return (!strcmp(master_conntrack->layer7.app_proto,
info->protocol));
++ }
++ else {
++ /* If not classified, set to "unknown" to distinguish from
++ connections that are still being tested. */
++ write_lock(&ct_lock);
++ master_conntrack->layer7.app_proto =
kmalloc(strlen("unknown")+1, GFP_ATOMIC);
++ if(!master_conntrack->layer7.app_proto){
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
match_no_append, bailing.\n");
++ write_unlock(&ct_lock);
++ return 1;
++ }
++ strcpy(master_conntrack->layer7.app_proto, "unknown");
++ write_unlock(&ct_lock);
++ return 0;
++ }
++}
++
++/* add the new app data to the conntrack. Return number of bytes added. */
++static int add_data(struct ip_conntrack * master_conntrack,
++ char * app_data, int appdatalen)
++{
++ int length = 0, i;
++ int oldlength = master_conntrack->layer7.app_data_len;
++
++ /* Strip nulls. Make everything lower case (our regex lib doesn't
++ do case insensitivity). Add it to the end of the current data. */
++ for(i = 0; i < maxdatalen-oldlength-1 &&
++ i < appdatalen; i++) {
++ if(app_data[i] != '\0') {
++ master_conntrack->layer7.app_data[length+oldlength] =
++ /* the kernel version of tolower mungs 'upper
ascii' */
++ isascii(app_data[i])? tolower(app_data[i]) :
app_data[i];
++ length++;
++ }
++ }
++
++ master_conntrack->layer7.app_data[length+oldlength] = '\0';
++ master_conntrack->layer7.app_data_len = length + oldlength;
++
++ return length;
++}
++
++/* Returns true on match and false otherwise. */
++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)
++{
++ struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++ enum ip_conntrack_info master_ctinfo, ctinfo;
++ struct ip_conntrack *master_conntrack, *conntrack;
++ unsigned char * app_data;
++ unsigned int pattern_result, appdatalen;
++ regexp * comppattern;
++
++ if(!can_handle(skb)){
++ DPRINTK("layer7: This is some protocol I can't handle.\n");
++ return info->invert;
++ }
++
++ /* Treat parent & all its children together as one connection, except
++ for the purpose of setting conntrack->layer7.app_proto in the actual
++ connection. This makes /proc/net/ip_conntrack more satisfying. */
++ if(!(conntrack = ip_conntrack_get((struct sk_buff *)skb, &ctinfo)) ||
++ !(master_conntrack = ip_conntrack_get((struct sk_buff *)skb,
&master_ctinfo))) {
++ //DPRINTK("layer7: packet is not from a known connection,
giving up.\n");
++ return info->invert;
++ }
++
++ /* Try to get a master conntrack (and its master etc) for FTP, etc. */
++ while (master_ct(master_conntrack) != NULL)
++ master_conntrack = master_ct(master_conntrack);
++
++ /* if we've classified it or seen too many packets */
++ if(TOTAL_PACKETS > num_packets ||
++ master_conntrack->layer7.app_proto) {
++
++ pattern_result = match_no_append(conntrack, master_conntrack,
ctinfo, master_ctinfo, info);
++
++ /* skb->cb[0] == seen. Avoid doing things twice if there are
two l7
++ rules. I'm not sure that using cb for this purpose is correct,
although
++ it says "put your private variables there". But it doesn't look
like it
++ is being used for anything else in the skbs that make it here.
How can
++ I write to cb without making the compiler angry? */
++ skb->cb[0] = 1; /* marking it seen here is probably irrelevant,
but consistant */
++
++ return (pattern_result ^ info->invert);
++ }
++
++ if(skb_is_nonlinear(skb)){
++ if(skb_linearize(skb, GFP_ATOMIC) != 0){
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: failed to linearize
packet, bailing.\n");
++ return info->invert;
++ }
++ }
++
++ /* now that the skb is linearized, it's safe to set these. */
++ app_data = skb->data + app_data_offset(skb);
++ appdatalen = skb->tail - app_data;
++
++ spin_lock_bh(&list_lock);
++ /* the return value gets checked later, when we're ready to use it */
++ comppattern = compile_and_cache(info->pattern, info->protocol);
++ spin_unlock_bh(&list_lock);
++
++ /* On the first packet of a connection, allocate space for app data */
++ write_lock(&ct_lock);
++ if(TOTAL_PACKETS == 1 && !skb->cb[0] &&
!master_conntrack->layer7.app_data) {
++ master_conntrack->layer7.app_data = kmalloc(maxdatalen,
GFP_ATOMIC);
++ if(!master_conntrack->layer7.app_data){
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
match, bailing.\n");
++ write_unlock(&ct_lock);
++ return info->invert;
++ }
++
++ master_conntrack->layer7.app_data[0] = '\0';
++ }
++ write_unlock(&ct_lock);
++
++ /* Can be here, but unallocated, if numpackets is increased near
++ the beginning of a connection */
++ if(master_conntrack->layer7.app_data == NULL)
++ return (info->invert); /* unmatched */
++
++ if(!skb->cb[0]){
++ int newbytes;
++ write_lock(&ct_lock);
++ newbytes = add_data(master_conntrack, app_data, appdatalen);
++ write_unlock(&ct_lock);
++
++ if(newbytes == 0) { /* didn't add any data */
++ skb->cb[0] = 1;
++ /* Didn't match before, not going to match now */
++ return info->invert;
++ }
++ }
++
++ /* If looking for "unknown", then never match. "Unknown" means that
++ we've given up; we're still trying with these packets. */
++ if(!strcmp(info->protocol, "unknown")) {
++ pattern_result = 0;
++ /* If the regexp failed to compile, don't bother running it */
++ } else if(comppattern && regexec(comppattern,
master_conntrack->layer7.app_data)) {
++ DPRINTK("layer7: matched %s\n", info->protocol);
++ pattern_result = 1;
++ } else pattern_result = 0;
++
++ if(pattern_result) {
++ write_lock(&ct_lock);
++ master_conntrack->layer7.app_proto =
kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
++ if(!master_conntrack->layer7.app_proto){
++ if (net_ratelimit())
++ printk(KERN_ERR "layer7: out of memory in
match, bailing.\n");
++ write_unlock(&ct_lock);
++ return (pattern_result ^ info->invert);
++ }
++ strcpy(master_conntrack->layer7.app_proto, info->protocol);
++ write_unlock(&ct_lock);
++ }
++
++ /* mark the packet seen */
++ skb->cb[0] = 1;
++
++ return (pattern_result ^ info->invert);
++}
++
++static int checkentry(const char *tablename, const struct ipt_ip *ip,
++ void *matchinfo, unsigned int matchsize, unsigned int hook_mask)
++{
++ if (matchsize != IPT_ALIGN(sizeof(struct ipt_layer7_info)))
++ return 0;
++ return 1;
++}
++
++static struct ipt_match layer7_match = {
++ .name = "layer7",
++ .match = &match,
++ .checkentry = &checkentry,
++ .me = THIS_MODULE
++};
++
++/* taken from drivers/video/modedb.c */
++static int my_atoi(const char *s)
++{
++ int val = 0;
++
++ for (;; s++) {
++ switch (*s) {
++ case '0'...'9':
++ val = 10*val+(*s-'0');
++ break;
++ default:
++ return val;
++ }
++ }
++}
++
++/* write out num_packets to userland. */
++static int layer7_read_proc(char* page, char ** start, off_t off, int count,
++ int* eof, void * data)
++{
++ if(num_packets > 99 && net_ratelimit())
++ printk(KERN_ERR "layer7: NOT REACHED. num_packets too big\n");
++
++ page[0] = num_packets/10 + '0';
++ page[1] = num_packets%10 + '0';
++ page[2] = '\n';
++ page[3] = '\0';
++
++ *eof=1;
++
++ return 3;
++}
++
++/* Read in num_packets from userland */
++static int layer7_write_proc(struct file* file, const char* buffer,
++ unsigned long count, void *data)
++{
++ char * foo = kmalloc(count, GFP_ATOMIC);
++
++ if(!foo){
++ if (net_ratelimit())
<<Diff was trimmed, longer than 597 lines>>
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