[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_dst.c b/ap/app/iptables/extensions/libip6t_dst.c
new file mode 100755
index 0000000..a47e3a3
--- /dev/null
+++ b/ap/app/iptables/extensions/libip6t_dst.c
@@ -0,0 +1,241 @@
+/* Shared library add-on to ip6tables to add Dst header support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <errno.h>
+#include <xtables.h>
+#include <linux/netfilter_ipv6/ip6t_opts.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+static void dst_help(void)
+{
+	printf(
+"dst match options:\n"
+"[!] --dst-len length            total length of this header\n"
+"  --dst-opts TYPE[:LEN][,TYPE[:LEN]...]\n"
+"                                Options and its length (list, max: %d)\n",
+IP6T_OPTS_OPTSNR);
+}
+
+static const struct option dst_opts[] = {
+	{ .name = "dst-len",        .has_arg = 1, .val = '1' },
+	{ .name = "dst-opts",       .has_arg = 1, .val = '2' },
+	{ .name = "dst-not-strict", .has_arg = 1, .val = '3' },
+	{ .name = NULL }
+};
+
+static u_int32_t
+parse_opts_num(const char *idstr, const char *typestr)
+{
+	unsigned long int id;
+	char* ep;
+
+	id = strtoul(idstr, &ep, 0);
+
+	if ( idstr == ep ) {
+		xtables_error(PARAMETER_PROBLEM,
+		           "dst: no valid digits in %s `%s'", typestr, idstr);
+	}
+	if ( id == ULONG_MAX  && errno == ERANGE ) {
+		xtables_error(PARAMETER_PROBLEM,
+			   "%s `%s' specified too big: would overflow",
+			   typestr, idstr);
+	}
+	if ( *idstr != '\0'  && *ep != '\0' ) {
+		xtables_error(PARAMETER_PROBLEM,
+		           "dst: error parsing %s `%s'", typestr, idstr);
+	}
+	return id;
+}
+
+static int
+parse_options(const char *optsstr, u_int16_t *opts)
+{
+        char *buffer, *cp, *next, *range;
+        unsigned int i;
+	
+	buffer = strdup(optsstr);
+        if (!buffer)
+		xtables_error(OTHER_PROBLEM, "strdup failed");
+			
+        for (cp = buffer, i = 0; cp && i < IP6T_OPTS_OPTSNR; cp = next, i++)
+        {
+                next = strchr(cp, ',');
+
+                if (next)
+			*next++='\0';
+
+                range = strchr(cp, ':');
+
+                if (range) {
+                        if (i == IP6T_OPTS_OPTSNR-1)
+				xtables_error(PARAMETER_PROBLEM,
+                                           "too many ports specified");
+                        *range++ = '\0';
+                }
+
+		opts[i] = (parse_opts_num(cp, "opt") & 0xFF) << 8;
+                if (range) {
+			if (opts[i] == 0)
+				xtables_error(PARAMETER_PROBLEM,
+					"PAD0 hasn't got length");
+			opts[i] |= parse_opts_num(range, "length") & 0xFF;
+                } else
+                        opts[i] |= (0x00FF);
+
+#ifdef DEBUG
+		printf("opts str: %s %s\n", cp, range);
+		printf("opts opt: %04X\n", opts[i]);
+#endif
+	}
+
+        if (cp)
+		xtables_error(PARAMETER_PROBLEM, "too many addresses specified");
+
+	free(buffer);
+
+#ifdef DEBUG
+	printf("addr nr: %d\n", i);
+#endif
+
+	return i;
+}
+
+static void dst_init(struct xt_entry_match *m)
+{
+	struct ip6t_opts *optinfo = (struct ip6t_opts *)m->data;
+
+	optinfo->hdrlen = 0;
+	optinfo->flags = 0;
+	optinfo->invflags = 0;
+	optinfo->optsnr = 0;
+}
+
+static int dst_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	struct ip6t_opts *optinfo = (struct ip6t_opts *)(*match)->data;
+
+	switch (c) {
+	case '1':
+		if (*flags & IP6T_OPTS_LEN)
+			xtables_error(PARAMETER_PROBLEM,
+				   "Only one `--dst-len' allowed");
+		xtables_check_inverse(optarg, &invert, &optind, 0);
+		optinfo->hdrlen = parse_opts_num(argv[optind-1], "length");
+		if (invert)
+			optinfo->invflags |= IP6T_OPTS_INV_LEN;
+		optinfo->flags |= IP6T_OPTS_LEN;
+		*flags |= IP6T_OPTS_LEN;
+		break;
+	case '2':
+		if (*flags & IP6T_OPTS_OPTS)
+			xtables_error(PARAMETER_PROBLEM,
+				   "Only one `--dst-opts' allowed");
+                xtables_check_inverse(optarg, &invert, &optind, 0);
+                if (invert)
+			xtables_error(PARAMETER_PROBLEM,
+				" '!' not allowed with `--dst-opts'");
+		optinfo->optsnr = parse_options(argv[optind-1], optinfo->opts);
+		optinfo->flags |= IP6T_OPTS_OPTS;
+		*flags |= IP6T_OPTS_OPTS;
+		break;
+	case '3':
+		if (*flags & IP6T_OPTS_NSTRICT)
+			xtables_error(PARAMETER_PROBLEM,
+				   "Only one `--dst-not-strict' allowed");
+		if ( !(*flags & IP6T_OPTS_OPTS) )
+			xtables_error(PARAMETER_PROBLEM,
+				   "`--dst-opts ...' required before "
+				   "`--dst-not-strict'");
+		optinfo->flags |= IP6T_OPTS_NSTRICT;
+		*flags |= IP6T_OPTS_NSTRICT;
+		break;
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void
+print_options(unsigned int optsnr, u_int16_t *optsp)
+{
+	unsigned int i;
+
+	for(i = 0; i < optsnr; i++) {
+		printf("%d", (optsp[i] & 0xFF00) >> 8);
+
+		if ((optsp[i] & 0x00FF) != 0x00FF)
+			printf(":%d", (optsp[i] & 0x00FF));
+
+		printf("%c", (i != optsnr - 1) ? ',' : ' ');
+	}
+}
+
+static void dst_print(const void *ip, const struct xt_entry_match *match,
+                      int numeric)
+{
+	const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
+
+	printf("dst ");
+	if (optinfo->flags & IP6T_OPTS_LEN)
+		printf("length:%s%u ",
+			optinfo->invflags & IP6T_OPTS_INV_LEN ? "!" : "",
+			optinfo->hdrlen);
+
+	if (optinfo->flags & IP6T_OPTS_OPTS)
+		printf("opts ");
+
+	print_options(optinfo->optsnr, (u_int16_t *)optinfo->opts);
+
+	if (optinfo->flags & IP6T_OPTS_NSTRICT)
+		printf("not-strict ");
+
+	if (optinfo->invflags & ~IP6T_OPTS_INV_MASK)
+		printf("Unknown invflags: 0x%X ",
+		       optinfo->invflags & ~IP6T_OPTS_INV_MASK);
+}
+
+static void dst_save(const void *ip, const struct xt_entry_match *match)
+{
+	const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
+
+	if (optinfo->flags & IP6T_OPTS_LEN) {
+		printf("%s--dst-len %u ",
+			(optinfo->invflags & IP6T_OPTS_INV_LEN) ? "! " : "", 
+			optinfo->hdrlen);
+	}
+
+	if (optinfo->flags & IP6T_OPTS_OPTS)
+		printf("--dst-opts ");
+
+	print_options(optinfo->optsnr, (u_int16_t *)optinfo->opts);
+
+	if (optinfo->flags & IP6T_OPTS_NSTRICT)
+		printf("--dst-not-strict ");
+}
+
+static struct xtables_match dst_mt6_reg = {
+	.name          = "dst",
+	.version       = XTABLES_VERSION,
+	.family        = NFPROTO_IPV6,
+	.size          = XT_ALIGN(sizeof(struct ip6t_opts)),
+	.userspacesize = XT_ALIGN(sizeof(struct ip6t_opts)),
+	.help          = dst_help,
+	.init          = dst_init,
+	.parse         = dst_parse,
+	.print         = dst_print,
+	.save          = dst_save,
+	.extra_opts    = dst_opts,
+};
+
+void
+_init(void)
+{
+	xtables_register_match(&dst_mt6_reg);
+}