[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/iptables/extensions/libipt_ttl.c b/ap/app/iptables/extensions/libipt_ttl.c
new file mode 100755
index 0000000..019a556
--- /dev/null
+++ b/ap/app/iptables/extensions/libipt_ttl.c
@@ -0,0 +1,167 @@
+/* Shared library add-on to iptables to add TTL matching support
+ * (C) 2000 by Harald Welte <laforge@gnumonks.org>
+ *
+ * $Id$
+ *
+ * This program is released under the terms of GNU GPL */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <xtables.h>
+
+#include <linux/netfilter_ipv4/ipt_ttl.h>
+
+static void ttl_help(void)
+{
+ printf(
+"ttl match options:\n"
+" --ttl-eq value Match time to live value\n"
+" --ttl-lt value Match TTL < value\n"
+" --ttl-gt value Match TTL > value\n");
+}
+
+static int ttl_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct ipt_ttl_info *info = (struct ipt_ttl_info *) (*match)->data;
+ unsigned int value;
+
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+
+ switch (c) {
+ case '2':
+ if (!xtables_strtoui(optarg, NULL, &value, 0, UINT8_MAX))
+ xtables_error(PARAMETER_PROBLEM,
+ "ttl: Expected value between 0 and 255");
+
+ if (invert)
+ info->mode = IPT_TTL_NE;
+ else
+ info->mode = IPT_TTL_EQ;
+
+ /* is 0 allowed? */
+ info->ttl = value;
+ break;
+ case '3':
+ if (!xtables_strtoui(optarg, NULL, &value, 0, UINT8_MAX))
+ xtables_error(PARAMETER_PROBLEM,
+ "ttl: Expected value between 0 and 255");
+
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "ttl: unexpected `!'");
+
+ info->mode = IPT_TTL_LT;
+ info->ttl = value;
+ break;
+ case '4':
+ if (!xtables_strtoui(optarg, NULL, &value, 0, UINT8_MAX))
+ xtables_error(PARAMETER_PROBLEM,
+ "ttl: Expected value between 0 and 255");
+
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "ttl: unexpected `!'");
+
+ info->mode = IPT_TTL_GT;
+ info->ttl = value;
+ break;
+ default:
+ return 0;
+
+ }
+
+ if (*flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "Can't specify TTL option twice");
+ *flags = 1;
+
+ return 1;
+}
+
+static void ttl_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "TTL match: You must specify one of "
+ "`--ttl-eq', `--ttl-lt', `--ttl-gt");
+}
+
+static void ttl_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct ipt_ttl_info *info =
+ (struct ipt_ttl_info *) match->data;
+
+ printf("TTL match ");
+ switch (info->mode) {
+ case IPT_TTL_EQ:
+ printf("TTL == ");
+ break;
+ case IPT_TTL_NE:
+ printf("TTL != ");
+ break;
+ case IPT_TTL_LT:
+ printf("TTL < ");
+ break;
+ case IPT_TTL_GT:
+ printf("TTL > ");
+ break;
+ }
+ printf("%u ", info->ttl);
+}
+
+static void ttl_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct ipt_ttl_info *info =
+ (struct ipt_ttl_info *) match->data;
+
+ switch (info->mode) {
+ case IPT_TTL_EQ:
+ printf("--ttl-eq ");
+ break;
+ case IPT_TTL_NE:
+ printf("! --ttl-eq ");
+ break;
+ case IPT_TTL_LT:
+ printf("--ttl-lt ");
+ break;
+ case IPT_TTL_GT:
+ printf("--ttl-gt ");
+ break;
+ default:
+ /* error */
+ break;
+ }
+ printf("%u ", info->ttl);
+}
+
+static const struct option ttl_opts[] = {
+ { "ttl", 1, NULL, '2' },
+ { "ttl-eq", 1, NULL, '2'},
+ { "ttl-lt", 1, NULL, '3'},
+ { "ttl-gt", 1, NULL, '4'},
+ { .name = NULL }
+};
+
+static struct xtables_match ttl_mt_reg = {
+ .name = "ttl",
+ .version = XTABLES_VERSION,
+ .family = NFPROTO_IPV4,
+ .size = XT_ALIGN(sizeof(struct ipt_ttl_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ipt_ttl_info)),
+ .help = ttl_help,
+ .parse = ttl_parse,
+ .final_check = ttl_check,
+ .print = ttl_print,
+ .save = ttl_save,
+ .extra_opts = ttl_opts,
+};
+
+
+void _init(void)
+{
+ xtables_register_match(&ttl_mt_reg);
+}