[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..12d8e72
--- /dev/null
+++ b/ap/app/iptables/extensions/libip6t_HL.c
@@ -0,0 +1,157 @@
+/*
+ * IPv6 Hop Limit Target module
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ * Based on HW's ttl target
+ * This program is distributed under the terms of GNU GPL
+ */
+
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <xtables.h>
+
+#include <linux/netfilter_ipv6/ip6t_HL.h>
+
+#define IP6T_HL_USED 1
+
+static void HL_help(void)
+{
+ printf(
+"HL target options\n"
+" --hl-set value Set HL to <value 0-255>\n"
+" --hl-dec value Decrement HL by <value 1-255>\n"
+" --hl-inc value Increment HL by <value 1-255>\n");
+}
+
+static int HL_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ struct ip6t_HL_info *info = (struct ip6t_HL_info *) (*target)->data;
+ unsigned int value;
+
+ if (*flags & IP6T_HL_USED) {
+ xtables_error(PARAMETER_PROBLEM,
+ "Can't specify HL option twice");
+ }
+
+ if (!optarg)
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: You must specify a value");
+
+ if (xtables_check_inverse(optarg, &invert, NULL, 0))
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: unexpected `!'");
+
+ if (!xtables_strtoui(optarg, NULL, &value, 0, UINT8_MAX))
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: Expected value between 0 and 255");
+
+ switch (c) {
+
+ case '1':
+ info->mode = IP6T_HL_SET;
+ break;
+
+ case '2':
+ if (value == 0) {
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: decreasing by 0?");
+ }
+
+ info->mode = IP6T_HL_DEC;
+ break;
+
+ case '3':
+ if (value == 0) {
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: increasing by 0?");
+ }
+
+ info->mode = IP6T_HL_INC;
+ break;
+
+ default:
+ return 0;
+
+ }
+
+ info->hop_limit = value;
+ *flags |= IP6T_HL_USED;
+
+ return 1;
+}
+
+static void HL_check(unsigned int flags)
+{
+ if (!(flags & IP6T_HL_USED))
+ xtables_error(PARAMETER_PROBLEM,
+ "HL: You must specify an action");
+}
+
+static void HL_save(const void *ip, const struct xt_entry_target *target)
+{
+ const struct ip6t_HL_info *info =
+ (struct ip6t_HL_info *) target->data;
+
+ switch (info->mode) {
+ case IP6T_HL_SET:
+ printf("--hl-set ");
+ break;
+ case IP6T_HL_DEC:
+ printf("--hl-dec ");
+ break;
+
+ case IP6T_HL_INC:
+ printf("--hl-inc ");
+ break;
+ }
+ printf("%u ", info->hop_limit);
+}
+
+static void HL_print(const void *ip, const struct xt_entry_target *target,
+ int numeric)
+{
+ const struct ip6t_HL_info *info =
+ (struct ip6t_HL_info *) target->data;
+
+ printf("HL ");
+ switch (info->mode) {
+ case IP6T_HL_SET:
+ printf("set to ");
+ break;
+ case IP6T_HL_DEC:
+ printf("decrement by ");
+ break;
+ case IP6T_HL_INC:
+ printf("increment by ");
+ break;
+ }
+ printf("%u ", info->hop_limit);
+}
+
+static const struct option HL_opts[] = {
+ { "hl-set", 1, NULL, '1' },
+ { "hl-dec", 1, NULL, '2' },
+ { "hl-inc", 1, NULL, '3' },
+ { .name = NULL }
+};
+
+static struct xtables_target hl_tg6_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_target(&hl_tg6_reg);
+}