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..bf1f8a5
--- /dev/null
+++ b/ap/app/iptables/extensions/libipt_ECN.c
@@ -0,0 +1,169 @@
+/* Shared library add-on to iptables for ECN, $Version$
+ *
+ * (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
+ *
+ * $Id$
+ */
+#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 target options\n"
+" --ecn-tcp-remove Remove all ECN bits from TCP header\n");
+}
+
+#if 0
+"ECN target v%s EXPERIMENTAL options (use with extreme care!)\n"
+" --ecn-ip-ect Set the IPv4 ECT codepoint (0 to 3)\n"
+" --ecn-tcp-cwr Set the IPv4 CWR bit (0 or 1)\n"
+" --ecn-tcp-ece Set the IPv4 ECE bit (0 or 1)\n",
+#endif
+
+
+static const struct option ECN_opts[] = {
+ { "ecn-tcp-remove", 0, NULL, 'F' },
+ { "ecn-tcp-cwr", 1, NULL, 'G' },
+ { "ecn-tcp-ece", 1, NULL, 'H' },
+ { "ecn-ip-ect", 1, NULL, '9' },
+ { .name = NULL }
+};
+
+static int ECN_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ unsigned int result;
+ struct ipt_ECN_info *einfo
+ = (struct ipt_ECN_info *)(*target)->data;
+
+ switch (c) {
+ case 'F':
+ if (*flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Only use --ecn-tcp-remove ONCE!");
+ einfo->operation = IPT_ECN_OP_SET_ECE | IPT_ECN_OP_SET_CWR;
+ einfo->proto.tcp.ece = 0;
+ einfo->proto.tcp.cwr = 0;
+ *flags = 1;
+ break;
+ case 'G':
+ if (*flags & IPT_ECN_OP_SET_CWR)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Only use --ecn-tcp-cwr ONCE!");
+ if (!xtables_strtoui(optarg, NULL, &result, 0, 1))
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Value out of range");
+ einfo->operation |= IPT_ECN_OP_SET_CWR;
+ einfo->proto.tcp.cwr = result;
+ *flags |= IPT_ECN_OP_SET_CWR;
+ break;
+ case 'H':
+ if (*flags & IPT_ECN_OP_SET_ECE)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Only use --ecn-tcp-ece ONCE!");
+ if (!xtables_strtoui(optarg, NULL, &result, 0, 1))
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Value out of range");
+ einfo->operation |= IPT_ECN_OP_SET_ECE;
+ einfo->proto.tcp.ece = result;
+ *flags |= IPT_ECN_OP_SET_ECE;
+ break;
+ case '9':
+ if (*flags & IPT_ECN_OP_SET_IP)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Only use --ecn-ip-ect ONCE!");
+ if (!xtables_strtoui(optarg, NULL, &result, 0, 3))
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Value out of range");
+ einfo->operation |= IPT_ECN_OP_SET_IP;
+ einfo->ip_ect = result;
+ *flags |= IPT_ECN_OP_SET_IP;
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void ECN_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "ECN target: Parameter --ecn-tcp-remove is required");
+}
+
+static void ECN_print(const void *ip, const struct xt_entry_target *target,
+ int numeric)
+{
+ const struct ipt_ECN_info *einfo =
+ (const struct ipt_ECN_info *)target->data;
+
+ printf("ECN ");
+
+ if (einfo->operation == (IPT_ECN_OP_SET_ECE|IPT_ECN_OP_SET_CWR)
+ && einfo->proto.tcp.ece == 0
+ && einfo->proto.tcp.cwr == 0)
+ printf("TCP remove ");
+ else {
+ if (einfo->operation & IPT_ECN_OP_SET_ECE)
+ printf("ECE=%u ", einfo->proto.tcp.ece);
+
+ if (einfo->operation & IPT_ECN_OP_SET_CWR)
+ printf("CWR=%u ", einfo->proto.tcp.cwr);
+
+ if (einfo->operation & IPT_ECN_OP_SET_IP)
+ printf("ECT codepoint=%u ", einfo->ip_ect);
+ }
+}
+
+static void ECN_save(const void *ip, const struct xt_entry_target *target)
+{
+ const struct ipt_ECN_info *einfo =
+ (const struct ipt_ECN_info *)target->data;
+
+ if (einfo->operation == (IPT_ECN_OP_SET_ECE|IPT_ECN_OP_SET_CWR)
+ && einfo->proto.tcp.ece == 0
+ && einfo->proto.tcp.cwr == 0)
+ printf("--ecn-tcp-remove ");
+ else {
+
+ if (einfo->operation & IPT_ECN_OP_SET_ECE)
+ printf("--ecn-tcp-ece %d ", einfo->proto.tcp.ece);
+
+ if (einfo->operation & IPT_ECN_OP_SET_CWR)
+ printf("--ecn-tcp-cwr %d ", einfo->proto.tcp.cwr);
+
+ if (einfo->operation & IPT_ECN_OP_SET_IP)
+ printf("--ecn-ip-ect %d ", einfo->ip_ect);
+ }
+}
+
+static struct xtables_target ecn_tg_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_target(&ecn_tg_reg);
+}