[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/libxt_state.c b/ap/app/iptables/extensions/libxt_state.c
new file mode 100755
index 0000000..0f26443
--- /dev/null
+++ b/ap/app/iptables/extensions/libxt_state.c
@@ -0,0 +1,173 @@
+/* Shared library add-on to iptables to add state tracking support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter/nf_conntrack_common.h>
+#include <linux/netfilter/xt_state.h>
+
+#ifndef XT_STATE_UNTRACKED
+#define XT_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 1))
+#endif
+
+static void
+state_help(void)
+{
+ printf(
+"state match options:\n"
+" [!] --state [INVALID|ESTABLISHED|NEW|RELATED|UNTRACKED][,...]\n"
+" State(s) to match\n");
+}
+
+static const struct option state_opts[] = {
+ { "state", 1, NULL, '1' },
+ { .name = NULL }
+};
+
+static int
+state_parse_state(const char *state, size_t len, struct xt_state_info *sinfo)
+{
+ if (strncasecmp(state, "INVALID", len) == 0)
+ sinfo->statemask |= XT_STATE_INVALID;
+ else if (strncasecmp(state, "NEW", len) == 0)
+ sinfo->statemask |= XT_STATE_BIT(IP_CT_NEW);
+ else if (strncasecmp(state, "ESTABLISHED", len) == 0)
+ sinfo->statemask |= XT_STATE_BIT(IP_CT_ESTABLISHED);
+ else if (strncasecmp(state, "RELATED", len) == 0)
+ sinfo->statemask |= XT_STATE_BIT(IP_CT_RELATED);
+ else if (strncasecmp(state, "UNTRACKED", len) == 0)
+ sinfo->statemask |= XT_STATE_UNTRACKED;
+ else
+ return 0;
+ return 1;
+}
+
+static void
+state_parse_states(const char *arg, struct xt_state_info *sinfo)
+{
+ const char *comma;
+
+ while ((comma = strchr(arg, ',')) != NULL) {
+ if (comma == arg || !state_parse_state(arg, comma-arg, sinfo))
+ xtables_error(PARAMETER_PROBLEM, "Bad state \"%s\"", arg);
+ arg = comma+1;
+ }
+ if (!*arg)
+ xtables_error(PARAMETER_PROBLEM, "\"--state\" requires a list of "
+ "states with no spaces, e.g. "
+ "ESTABLISHED,RELATED");
+ if (strlen(arg) == 0 || !state_parse_state(arg, strlen(arg), sinfo))
+ xtables_error(PARAMETER_PROBLEM, "Bad state \"%s\"", arg);
+}
+
+static int
+state_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry,
+ struct xt_entry_match **match)
+{
+ struct xt_state_info *sinfo = (struct xt_state_info *)(*match)->data;
+
+ switch (c) {
+ case '1':
+ xtables_check_inverse(optarg, &invert, &optind, 0);
+
+ state_parse_states(argv[optind-1], sinfo);
+ if (invert)
+ sinfo->statemask = ~sinfo->statemask;
+ *flags = 1;
+ break;
+
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void state_final_check(unsigned int flags)
+{
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM, "You must specify \"--state\"");
+}
+
+static void state_print_state(unsigned int statemask)
+{
+ const char *sep = "";
+
+ if (statemask & XT_STATE_INVALID) {
+ printf("%sINVALID", sep);
+ sep = ",";
+ }
+ if (statemask & XT_STATE_BIT(IP_CT_NEW)) {
+ printf("%sNEW", sep);
+ sep = ",";
+ }
+ if (statemask & XT_STATE_BIT(IP_CT_RELATED)) {
+ printf("%sRELATED", sep);
+ sep = ",";
+ }
+ if (statemask & XT_STATE_BIT(IP_CT_ESTABLISHED)) {
+ printf("%sESTABLISHED", sep);
+ sep = ",";
+ }
+ if (statemask & XT_STATE_UNTRACKED) {
+ printf("%sUNTRACKED", sep);
+ sep = ",";
+ }
+ printf(" ");
+}
+
+static void
+state_print(const void *ip,
+ const struct xt_entry_match *match,
+ int numeric)
+{
+ struct xt_state_info *sinfo = (struct xt_state_info *)match->data;
+
+ printf("state ");
+ state_print_state(sinfo->statemask);
+}
+
+static void state_save(const void *ip, const struct xt_entry_match *match)
+{
+ struct xt_state_info *sinfo = (struct xt_state_info *)match->data;
+
+ printf("--state ");
+ state_print_state(sinfo->statemask);
+}
+
+static struct xtables_match state_match = {
+ .family = NFPROTO_IPV4,
+ .name = "state",
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_state_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_state_info)),
+ .help = state_help,
+ .parse = state_parse,
+ .final_check = state_final_check,
+ .print = state_print,
+ .save = state_save,
+ .extra_opts = state_opts,
+};
+
+static struct xtables_match state_match6 = {
+ .family = NFPROTO_IPV6,
+ .name = "state",
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_state_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_state_info)),
+ .help = state_help,
+ .parse = state_parse,
+ .final_check = state_final_check,
+ .print = state_print,
+ .save = state_save,
+ .extra_opts = state_opts,
+};
+
+void _init(void)
+{
+ xtables_register_match(&state_match);
+ xtables_register_match(&state_match6);
+}