From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 13 Apr 2015 22:23:19 +0000 (+0000)
Subject: iptables: remove layer7 support
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4e4060138a5590b8deab3adc745d0e2619bbdf22;p=openwrt%2Fstaging%2Fansuel.git

iptables: remove layer7 support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45424
---

diff --git a/package/network/utils/iptables/Makefile b/package/network/utils/iptables/Makefile
index ab21b41fda..b8a02772ea 100644
--- a/package/network/utils/iptables/Makefile
+++ b/package/network/utils/iptables/Makefile
@@ -124,7 +124,6 @@ iptables extensions for packet content inspection.
 Includes support for:
 
  Matches:
-  - layer7
   - string
 
 endef
diff --git a/package/network/utils/iptables/patches/002-layer7_2.22.patch b/package/network/utils/iptables/patches/002-layer7_2.22.patch
deleted file mode 100644
index ba4531e3f3..0000000000
--- a/package/network/utils/iptables/patches/002-layer7_2.22.patch
+++ /dev/null
@@ -1,371 +0,0 @@
---- /dev/null
-+++ b/extensions/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);
-+}