[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/libip6t_hl.c b/ap/app/iptables/extensions/libip6t_hl.c
new file mode 100755
index 0000000..9252c3d
--- /dev/null
+++ b/ap/app/iptables/extensions/libip6t_hl.c
@@ -0,0 +1,144 @@
+/*
+ * IPv6 Hop Limit matching module
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ * Based on HW's ttl match
+ * This program is released under the terms of GNU GPL
+ * Cleanups by Stephane Ouellette <ouellettes@videotron.ca>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <xtables.h>
+
+#include <linux/netfilter_ipv6/ip6t_hl.h>
+
+static void hl_help(void)
+{
+ printf(
+"hl match options:\n"
+"[!] --hl-eq value Match hop limit value\n"
+" --hl-lt value Match HL < value\n"
+" --hl-gt value Match HL > value\n");
+}
+
+static int hl_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct ip6t_hl_info *info = (struct ip6t_hl_info *) (*match)->data;
+ u_int8_t value;
+
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+ value = atoi(argv[optind-1]);
+
+ if (*flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "Can't specify HL option twice");
+
+ if (!optarg)
+ xtables_error(PARAMETER_PROBLEM,
+ "hl: You must specify a value");
+ switch (c) {
+ case '2':
+ if (invert)
+ info->mode = IP6T_HL_NE;
+ else
+ info->mode = IP6T_HL_EQ;
+
+ /* is 0 allowed? */
+ info->hop_limit = value;
+ *flags = 1;
+
+ break;
+ case '3':
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "hl: unexpected `!'");
+
+ info->mode = IP6T_HL_LT;
+ info->hop_limit = value;
+ *flags = 1;
+
+ break;
+ case '4':
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "hl: unexpected `!'");
+
+ info->mode = IP6T_HL_GT;
+ info->hop_limit = value;
+ *flags = 1;
+
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void hl_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "HL match: You must specify one of "
+ "`--hl-eq', `--hl-lt', `--hl-gt'");
+}
+
+static void hl_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ static const char *op[] = {
+ [IP6T_HL_EQ] = "==",
+ [IP6T_HL_NE] = "!=",
+ [IP6T_HL_LT] = "<",
+ [IP6T_HL_GT] = ">" };
+
+ const struct ip6t_hl_info *info =
+ (struct ip6t_hl_info *) match->data;
+
+ printf("HL match HL %s %u ", op[info->mode], info->hop_limit);
+}
+
+static void hl_save(const void *ip, const struct xt_entry_match *match)
+{
+ static const char *const op[] = {
+ [IP6T_HL_EQ] = "--hl-eq",
+ [IP6T_HL_NE] = "! --hl-eq",
+ [IP6T_HL_LT] = "--hl-lt",
+ [IP6T_HL_GT] = "--hl-gt" };
+
+ const struct ip6t_hl_info *info =
+ (struct ip6t_hl_info *) match->data;
+
+ printf("%s %u ", op[info->mode], info->hop_limit);
+}
+
+static const struct option hl_opts[] = {
+ { .name = "hl", .has_arg = 1, .val = '2' },
+ { .name = "hl-eq", .has_arg = 1, .val = '2' },
+ { .name = "hl-lt", .has_arg = 1, .val = '3' },
+ { .name = "hl-gt", .has_arg = 1, .val = '4' },
+ { .name = NULL }
+};
+
+static struct xtables_match hl_mt6_reg = {
+ .name = "hl",
+ .version = XTABLES_VERSION,
+ .family = NFPROTO_IPV6,
+ .size = XT_ALIGN(sizeof(struct ip6t_hl_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ip6t_hl_info)),
+ .help = hl_help,
+ .parse = hl_parse,
+ .final_check = hl_check,
+ .print = hl_print,
+ .save = hl_save,
+ .extra_opts = hl_opts,
+};
+
+
+void _init(void)
+{
+ xtables_register_match(&hl_mt6_reg);
+}