package/iptables: update to iptables-1.4.10 & layer7_2.22. (partially closes #8369)

SVN-Revision: 24345

1 files changed, 371 insertions, 0 deletions

diff --git a/package/iptables/patches/002-layer7_2.22.patch b/package/iptables/patches/002-layer7_2.22.patch
new file mode 100644
index 0000000000..04b21c0105
--- /dev/null
+++ b/package/iptables/patches/002-layer7_2.22.patch
@@ -0,0 +1,371 @@
+--- /dev/null
++++ b/libxt_layer7.c
+@@ -0,0 +1,368 @@
++/* 
++   Shared library add-on to iptables for layer 7 matching support. 
++  
++   By Matthew Strait <quadong@users.sf.net>, Oct 2003-Aug 2008.
++
++   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
++*/
++
++#define _GNU_SOURCE
++#include <stdio.h>
++#include <netdb.h>
++#include <string.h>
++#include <stdlib.h>
++#include <getopt.h>
++#include <ctype.h>
++#include <dirent.h>
++
++#include <xtables.h>
++#include <linux/netfilter/xt_layer7.h>
++
++#define MAX_FN_LEN 256
++
++static char l7dir[MAX_FN_LEN] = "\0";
++
++/* Function which prints out usage message. */
++static void help(void)
++{
++	printf(
++	"layer7 match options:\n"
++	"    --l7dir <directory> : Look for patterns here instead of /etc/l7-protocols/\n"
++	"                          (--l7dir must be specified before --l7proto if used)\n"
++	"[!] --l7proto <name>: Match named protocol using /etc/l7-protocols/.../name.pat\n");
++}
++
++static const struct option opts[] = {
++	{ .name = "l7proto", .has_arg = 1, .val = 'p' },
++	{ .name = "l7dir",   .has_arg = 1, .val = 'd' },
++	{ .name = NULL }
++};
++
++/* reads filename, puts protocol info into layer7_protocol_info, number of protocols to numprotos */
++static int parse_protocol_file(char * filename, const char * protoname, struct xt_layer7_info *info)
++{
++	FILE * f;
++	char * line = NULL;
++	size_t len = 0;
++
++	enum { protocol, pattern, done } datatype = protocol;
++
++	f = fopen(filename, "r");
++
++	if(!f)
++		return 0;
++
++	while(getline(&line, &len, f) != -1)
++	{
++		if(strlen(line) < 2 || line[0] == '#')
++			continue;
++
++		/* strip the pesky newline... */
++		if(line[strlen(line) - 1] == '\n')
++			line[strlen(line) - 1] = '\0';
++
++		if(datatype == protocol)
++		{
++			/* Ignore everything on the line beginning with the 
++			first space or tab . For instance, this allows the 
++			protocol line in http.pat to be "http " (or 
++			"http I am so cool") instead of just "http". */
++			if(strchr(line, ' ')){
++				char * space = strchr(line, ' ');
++				space[0] = '\0';
++			}
++			if(strchr(line, '\t')){
++				char * space = strchr(line, '\t');
++				space[0] = '\0';
++			}
++
++			/* sanity check.  First non-comment non-blank 
++			line must be the same as the file name. */
++			if(strcmp(line, protoname))
++				xtables_error(OTHER_PROBLEM, 
++					"Protocol name (%s) doesn't match file name (%s).  Bailing out\n",
++					line, filename);
++
++			if(strlen(line) >= MAX_PROTOCOL_LEN)
++				 xtables_error(PARAMETER_PROBLEM, 
++					"Protocol name in %s too long!", filename);
++			strncpy(info->protocol, line, MAX_PROTOCOL_LEN);
++
++			datatype = pattern; 
++		}
++		else if(datatype == pattern)
++		{
++			if(strlen(line) >= MAX_PATTERN_LEN)
++				 xtables_error(PARAMETER_PROBLEM, "Pattern in %s too long!", filename);
++			strncpy(info->pattern, line, MAX_PATTERN_LEN);
++			
++			datatype = done;			
++			break;
++		}
++		else
++			xtables_error(OTHER_PROBLEM, "Internal error");
++	}
++
++	if(datatype != done)
++		xtables_error(OTHER_PROBLEM, "Failed to get all needed data from %s", filename);
++
++	if(line) free(line);
++	fclose(f);
++
++	return 1;
++}
++
++static int hex2dec(char c)
++{
++        switch (c)
++        {
++                case '0' ... '9':
++                        return c - '0';
++                case 'a' ... 'f':
++                        return c - 'a' + 10;
++                case 'A' ... 'F':
++                        return c - 'A' + 10;
++                default:
++                        xtables_error(OTHER_PROBLEM, "hex2dec: bad value!\n");
++                        return 0;
++        }
++}
++
++/* takes a string with \xHH escapes and returns one with the characters 
++they stand for */
++static char * pre_process(char * s)
++{
++	char * result = malloc(strlen(s) + 1);
++	int sindex = 0, rrindex = 0;
++        while( sindex < strlen(s) )
++        {
++            if( sindex + 3 < strlen(s) &&
++                s[sindex] == '\\' && s[sindex+1] == 'x' && 
++                isxdigit(s[sindex + 2]) && isxdigit(s[sindex + 3]) ) 
++                {
++                        /* carefully remember to call tolower here... */
++                        result[rrindex] = tolower( hex2dec(s[sindex + 2])*16 +
++                                                  hex2dec(s[sindex + 3] ) );
++
++			switch ( result[rrindex] )
++			{
++			case 0x24:
++			case 0x28:
++			case 0x29:
++			case 0x2a:
++			case 0x2b:
++			case 0x2e:
++			case 0x3f:
++			case 0x5b:
++			case 0x5c:
++			case 0x5d:
++			case 0x5e:
++			case 0x7c:
++				fprintf(stderr, 
++					"Warning: layer7 regexp contains a control character, %c, in hex (\\x%c%c).\n"
++					"I recommend that you write this as %c or \\%c, depending on what you meant.\n",
++					result[rrindex], s[sindex + 2], s[sindex + 3], result[rrindex], result[rrindex]);
++				break;
++			case 0x00:
++				fprintf(stderr, 
++					"Warning: null (\\x00) in layer7 regexp.  A null terminates the regexp string!\n");
++				break;
++			default:
++				break;
++			}
++
++
++                        sindex += 3; /* 4 total */
++                }
++                else
++                        result[rrindex] = tolower(s[sindex]);
++
++		sindex++; 
++		rrindex++;
++        }
++	result[rrindex] = '\0';
++
++	return result;
++}
++
++#define MAX_SUBDIRS 128
++static char ** readl7dir(char * dirname)
++{
++        DIR             * scratchdir;
++        struct dirent   ** namelist;
++	char ** subdirs = malloc(MAX_SUBDIRS * sizeof(char *));
++
++        int n, d = 1;
++	subdirs[0] = "";
++
++        n = scandir(dirname, &namelist, 0, alphasort);
++
++	if (n < 0)
++	{
++            perror("scandir");
++	    xtables_error(OTHER_PROBLEM, "Couldn't open %s\n", dirname);
++	}
++        else 
++	{
++            	while(n--) 
++		{
++			char fulldirname[MAX_FN_LEN];
++
++			snprintf(fulldirname, MAX_FN_LEN, "%s/%s", dirname, namelist[n]->d_name);
++
++                	if((scratchdir = opendir(fulldirname)) != NULL)
++			{
++				closedir(scratchdir);
++
++				if(!strcmp(namelist[n]->d_name, ".") || 
++				   !strcmp(namelist[n]->d_name, ".."))
++					/* do nothing */ ;
++				else
++				{
++					subdirs[d] = malloc(strlen(namelist[n]->d_name) + 1);
++					strcpy(subdirs[d], namelist[n]->d_name);
++					d++;
++					if(d >= MAX_SUBDIRS - 1)
++					{
++						fprintf(stderr, 
++						  "Too many subdirectories, skipping the rest!\n");
++						break;
++					}
++				}
++			}
++                	free(namelist[n]);
++            	}
++            	free(namelist);
++        }
++	
++	subdirs[d] = NULL;
++
++	return subdirs;
++}
++
++static void parse_layer7_protocol(const char *s, struct xt_layer7_info *info)
++{
++	char filename[MAX_FN_LEN];
++	char * dir = NULL;
++	char ** subdirs;
++	int n = 0, done = 0;
++
++	if(strlen(l7dir) > 0) dir = l7dir;
++	else                  dir = "/etc/l7-protocols";
++
++	subdirs = readl7dir(dir);
++
++	while(subdirs[n] != NULL)
++	{
++		int c = snprintf(filename, MAX_FN_LEN, "%s/%s/%s.pat", dir, subdirs[n], s);
++
++		if(c > MAX_FN_LEN)
++			xtables_error(OTHER_PROBLEM, 
++				"Filename beginning with %s is too long!\n", filename);
++
++		/* read in the pattern from the file */
++		if(parse_protocol_file(filename, s, info)){
++			done = 1;
++			break;
++		}
++		
++		n++;
++	}
++
++	if(!done)
++		xtables_error(OTHER_PROBLEM, 
++			"Couldn't find a pattern definition file for %s.\n", s);
++
++	/* process \xHH escapes and tolower everything. (our regex lib has no
++	case insensitivity option.) */
++	strncpy(info->pattern, pre_process(info->pattern), MAX_PATTERN_LEN);
++}
++
++/* Function which parses command options; returns true if it ate an option */
++static int parse(int c, char **argv, int invert, unsigned int *flags,
++      const void *entry, struct xt_entry_match **match)
++{
++	struct xt_layer7_info *layer7info = 
++		(struct xt_layer7_info *)(*match)->data;
++
++	switch (c) {
++	case 'p':
++		parse_layer7_protocol(argv[optind-1], layer7info);
++		if (invert)
++			layer7info->invert = true;
++		*flags = 1;
++		break;
++
++	case 'd':
++		if(strlen(argv[optind-1]) >= MAX_FN_LEN)
++			xtables_error(PARAMETER_PROBLEM, "directory name too long\n");
++
++		strncpy(l7dir, argv[optind-1], MAX_FN_LEN);
++
++		*flags = 1;
++		break;
++
++	default:
++		return 0;
++	}
++
++	return 1;
++}
++
++/* Final check; must have specified --l7proto */
++static void final_check(unsigned int flags)
++{
++	if (!flags)
++		xtables_error(PARAMETER_PROBLEM,
++			   "LAYER7 match: You must specify `--l7proto'");
++}
++
++static void print_protocol(char s[], int invert, int numeric)
++{
++	fputs("l7proto ", stdout);
++	if (invert) fputc('!', stdout);
++	printf("%s ", s);
++}
++
++/* Prints out the matchinfo. */
++static void print(const void *ip,
++      const struct xt_entry_match *match,
++      int numeric)
++{
++	printf("LAYER7 ");
++	print_protocol(((struct xt_layer7_info *)match->data)->protocol,
++		  ((struct xt_layer7_info *)match->data)->invert, numeric);
++}
++/* Saves the union ipt_matchinfo in parsable form to stdout. */
++static void save(const void *ip, const struct xt_entry_match *match)
++{
++        const struct xt_layer7_info *info =
++            (const struct xt_layer7_info*) match->data;
++
++        printf("--l7proto %s%s ", (info->invert)? "! ":"", info->protocol);
++}
++
++static struct xtables_match layer7 = { 
++    .family        = AF_INET,
++    .name          = "layer7",
++    .version       = XTABLES_VERSION,
++    .size          = XT_ALIGN(sizeof(struct xt_layer7_info)),
++    .userspacesize = XT_ALIGN(sizeof(struct xt_layer7_info)),
++    .help          = &help,
++    .parse         = &parse,
++    .final_check   = &final_check,
++    .print         = &print,
++    .save          = &save,
++    .extra_opts    = opts
++};
++
++void _init(void)
++{
++	xtables_register_match(&layer7);
++}