zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/iptables/extensions/libipt_ecn.c b/ap/app/iptables/extensions/libipt_ecn.c
new file mode 100755
index 0000000..3ee190e
--- /dev/null
+++ b/ap/app/iptables/extensions/libipt_ecn.c
@@ -0,0 +1,160 @@
+/* Shared library add-on to iptables for ECN matching
+ *
+ * (C) 2002 by Harald Welte <laforge@gnumonks.org>
+ *
+ * This program is distributed under the terms of GNU GPL v2, 1991
+ *
+ * libipt_ecn.c borrowed heavily from libipt_dscp.c
+ *
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter_ipv4/ipt_ecn.h>
+
+static void ecn_help(void)
+{
+ printf(
+"ECN match options\n"
+"[!] --ecn-tcp-cwr Match CWR bit of TCP header\n"
+"[!] --ecn-tcp-ece Match ECE bit of TCP header\n"
+"[!] --ecn-ip-ect [0..3] Match ECN codepoint in IPv4 header\n");
+}
+
+static const struct option ecn_opts[] = {
+ { .name = "ecn-tcp-cwr", .has_arg = 0, .val = 'F' },
+ { .name = "ecn-tcp-ece", .has_arg = 0, .val = 'G' },
+ { .name = "ecn-ip-ect", .has_arg = 1, .val = 'H' },
+ { .name = NULL }
+};
+
+static int ecn_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ unsigned int result;
+ struct ipt_ecn_info *einfo
+ = (struct ipt_ecn_info *)(*match)->data;
+
+ switch (c) {
+ case 'F':
+ if (*flags & IPT_ECN_OP_MATCH_CWR)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN match: can only use parameter ONCE!");
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+ einfo->operation |= IPT_ECN_OP_MATCH_CWR;
+ if (invert)
+ einfo->invert |= IPT_ECN_OP_MATCH_CWR;
+ *flags |= IPT_ECN_OP_MATCH_CWR;
+ break;
+
+ case 'G':
+ if (*flags & IPT_ECN_OP_MATCH_ECE)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN match: can only use parameter ONCE!");
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+ einfo->operation |= IPT_ECN_OP_MATCH_ECE;
+ if (invert)
+ einfo->invert |= IPT_ECN_OP_MATCH_ECE;
+ *flags |= IPT_ECN_OP_MATCH_ECE;
+ break;
+
+ case 'H':
+ if (*flags & IPT_ECN_OP_MATCH_IP)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN match: can only use parameter ONCE!");
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+ if (invert)
+ einfo->invert |= IPT_ECN_OP_MATCH_IP;
+ *flags |= IPT_ECN_OP_MATCH_IP;
+ einfo->operation |= IPT_ECN_OP_MATCH_IP;
+ if (!xtables_strtoui(optarg, NULL, &result, 0, 3))
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN match: Value out of range");
+ einfo->ip_ect = result;
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void ecn_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN match: some option required");
+}
+
+static void ecn_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct ipt_ecn_info *einfo =
+ (const struct ipt_ecn_info *)match->data;
+
+ printf("ECN match ");
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_ECE) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_ECE)
+ fputc('!', stdout);
+ printf("ECE ");
+ }
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_CWR) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_CWR)
+ fputc('!', stdout);
+ printf("CWR ");
+ }
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_IP) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_IP)
+ fputc('!', stdout);
+ printf("ECT=%d ", einfo->ip_ect);
+ }
+}
+
+static void ecn_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct ipt_ecn_info *einfo =
+ (const struct ipt_ecn_info *)match->data;
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_ECE) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_ECE)
+ printf("! ");
+ printf("--ecn-tcp-ece ");
+ }
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_CWR) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_CWR)
+ printf("! ");
+ printf("--ecn-tcp-cwr ");
+ }
+
+ if (einfo->operation & IPT_ECN_OP_MATCH_IP) {
+ if (einfo->invert & IPT_ECN_OP_MATCH_IP)
+ printf("! ");
+ printf("--ecn-ip-ect %d", einfo->ip_ect);
+ }
+}
+
+static struct xtables_match ecn_mt_reg = {
+ .name = "ecn",
+ .version = XTABLES_VERSION,
+ .family = NFPROTO_IPV4,
+ .size = XT_ALIGN(sizeof(struct ipt_ecn_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ipt_ecn_info)),
+ .help = ecn_help,
+ .parse = ecn_parse,
+ .final_check = ecn_check,
+ .print = ecn_print,
+ .save = ecn_save,
+ .extra_opts = ecn_opts,
+};
+
+void _init(void)
+{
+ xtables_register_match(&ecn_mt_reg);
+}