--- /dev/null
+/*
+ * m_xt.c xtables based targets
+ * utilities mostly ripped from iptables <duh, its the linux way>
+ *
+ * This program is free software; you can distribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: J Hadi Salim (hadi@cyberus.ca)
+ */
+
+/*XXX: in the future (xtables 1.4.3?) get rid of everything tagged
+ * as TC_CONFIG_XT_H */
+
+#include <syslog.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <xtables.h>
+#include "utils.h"
+#include "tc_util.h"
+#include <linux/tc_act/tc_ipt.h>
+#include <stdio.h>
+#include <dlfcn.h>
+#include <getopt.h>
+#include <errno.h>
+#include <string.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#ifdef TC_CONFIG_XT_H
+#include "xt-internal.h"
+#endif
+
+static const char *pname = "tc-ipt";
+static const char *tname = "mangle";
+static const char *pversion = "0.2";
+
+static const char *ipthooks[] = {
+ "NF_IP_PRE_ROUTING",
+ "NF_IP_LOCAL_IN",
+ "NF_IP_FORWARD",
+ "NF_IP_LOCAL_OUT",
+ "NF_IP_POST_ROUTING",
+};
+
+static struct option original_opts[] = {
+ {"jump", 1, 0, 'j'},
+ {0, 0, 0, 0}
+};
+
+static struct option *opts = original_opts;
+static unsigned int global_option_offset = 0;
+char *lib_dir;
+const char *program_version = XTABLES_VERSION;
+const char *program_name = "tc-ipt";
+struct afinfo afinfo = {
+ .family = AF_INET,
+ .libprefix = "libxt_",
+ .ipproto = IPPROTO_IP,
+ .kmod = "ip_tables",
+ .so_rev_target = IPT_SO_GET_REVISION_TARGET,
+};
+
+
+#define OPTION_OFFSET 256
+
+/*XXX: TC_CONFIG_XT_H */
+static void free_opts(struct option *local_opts)
+{
+ if (local_opts != original_opts) {
+ free(local_opts);
+ opts = original_opts;
+ global_option_offset = 0;
+ }
+}
+
+/*XXX: TC_CONFIG_XT_H */
+static struct option *
+merge_options(struct option *oldopts, const struct option *newopts,
+ unsigned int *option_offset)
+{
+ struct option *merge;
+ unsigned int num_old, num_new, i;
+
+ for (num_old = 0; oldopts[num_old].name; num_old++) ;
+ for (num_new = 0; newopts[num_new].name; num_new++) ;
+
+ *option_offset = global_option_offset + OPTION_OFFSET;
+
+ merge = malloc(sizeof (struct option) * (num_new + num_old + 1));
+ memcpy(merge, oldopts, num_old * sizeof (struct option));
+ for (i = 0; i < num_new; i++) {
+ merge[num_old + i] = newopts[i];
+ merge[num_old + i].val += *option_offset;
+ }
+ memset(merge + num_old + num_new, 0, sizeof (struct option));
+
+ return merge;
+}
+
+
+/*XXX: TC_CONFIG_XT_H */
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+/*XXX: TC_CONFIG_XT_H */
+int
+check_inverse(const char option[], int *invert, int *my_optind, int argc)
+{
+ if (option && strcmp(option, "!") == 0) {
+ if (*invert)
+ exit_error(PARAMETER_PROBLEM,
+ "Multiple `!' flags not allowed");
+ *invert = TRUE;
+ if (my_optind != NULL) {
+ ++*my_optind;
+ if (argc && *my_optind > argc)
+ exit_error(PARAMETER_PROBLEM,
+ "no argument following `!'");
+ }
+
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*XXX: TC_CONFIG_XT_H */
+void exit_error(enum exittype status, const char *msg, ...)
+{
+ va_list args;
+
+ va_start(args, msg);
+ fprintf(stderr, "%s v%s: ", pname, pversion);
+ vfprintf(stderr, msg, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ /* On error paths, make sure that we don't leak memory */
+ exit(status);
+}
+
+/*XXX: TC_CONFIG_XT_H */
+static void set_revision(char *name, u_int8_t revision)
+{
+ /* Old kernel sources don't have ".revision" field,
+ * but we stole a byte from name. */
+ name[IPT_FUNCTION_MAXNAMELEN - 2] = '\0';
+ name[IPT_FUNCTION_MAXNAMELEN - 1] = revision;
+}
+
+/*
+ * we may need to check for version mismatch
+*/
+int
+build_st(struct xtables_target *target, struct xt_entry_target *t)
+{
+
+ size_t size =
+ XT_ALIGN(sizeof (struct xt_entry_target)) + target->size;
+
+ if (NULL == t) {
+ target->t = fw_calloc(1, size);
+ target->t->u.target_size = size;
+ strcpy(target->t->u.user.name, target->name);
+ set_revision(target->t->u.user.name, target->revision);
+
+ if (target->init != NULL)
+ target->init(target->t);
+ } else {
+ target->t = t;
+ }
+ return 0;
+
+}
+
+inline void set_lib_dir(void)
+{
+
+ lib_dir = getenv("XTABLES_LIBDIR");
+ if (!lib_dir) {
+ lib_dir = getenv("IPTABLES_LIB_DIR");
+ if (lib_dir)
+ fprintf(stderr, "using deprecated IPTABLES_LIB_DIR \n");
+ }
+ if (lib_dir == NULL)
+ lib_dir = XT_LIB_DIR;
+
+}
+
+static int parse_ipt(struct action_util *a,int *argc_p,
+ char ***argv_p, int tca_id, struct nlmsghdr *n)
+{
+ struct xtables_target *m = NULL;
+ struct ipt_entry fw;
+ struct rtattr *tail;
+ int c;
+ int rargc = *argc_p;
+ char **argv = *argv_p;
+ int argc = 0, iargc = 0;
+ char k[16];
+ int res = -1;
+ int size = 0;
+ int iok = 0, ok = 0;
+ __u32 hook = 0, index = 0;
+ res = 0;
+
+ set_lib_dir();
+
+ {
+ int i;
+ for (i = 0; i < rargc; i++) {
+ if (NULL == argv[i] || 0 == strcmp(argv[i], "action")) {
+ break;
+ }
+ }
+ iargc = argc = i;
+ }
+
+ if (argc <= 2) {
+ fprintf(stderr,"bad arguements to ipt %d vs %d \n", argc, rargc);
+ return -1;
+ }
+
+ while (1) {
+ c = getopt_long(argc, argv, "j:", opts, NULL);
+ if (c == -1)
+ break;
+ switch (c) {
+ case 'j':
+ m = find_target(optarg, TRY_LOAD);
+ if (NULL != m) {
+
+ if (0 > build_st(m, NULL)) {
+ printf(" %s error \n", m->name);
+ return -1;
+ }
+ opts =
+ merge_options(opts, m->extra_opts,
+ &m->option_offset);
+ } else {
+ fprintf(stderr," failed to find target %s\n\n", optarg);
+ return -1;
+ }
+ ok++;
+ break;
+
+ default:
+ memset(&fw, 0, sizeof (fw));
+ if (m) {
+ m->parse(c - m->option_offset, argv, 0,
+ &m->tflags, NULL, &m->t);
+ } else {
+ fprintf(stderr," failed to find target %s\n\n", optarg);
+ return -1;
+
+ }
+ ok++;
+ break;
+
+ }
+ }
+
+ if (iargc > optind) {
+ if (matches(argv[optind], "index") == 0) {
+ if (get_u32(&index, argv[optind + 1], 10)) {
+ fprintf(stderr, "Illegal \"index\"\n");
+ free_opts(opts);
+ return -1;
+ }
+ iok++;
+
+ optind += 2;
+ }
+ }
+
+ if (!ok && !iok) {
+ fprintf(stderr," ipt Parser BAD!! (%s)\n", *argv);
+ return -1;
+ }
+
+ /* check that we passed the correct parameters to the target */
+ if (m)
+ m->final_check(m->tflags);
+
+ {
+ struct tcmsg *t = NLMSG_DATA(n);
+ if (t->tcm_parent != TC_H_ROOT
+ && t->tcm_parent == TC_H_MAJ(TC_H_INGRESS)) {
+ hook = NF_IP_PRE_ROUTING;
+ } else {
+ hook = NF_IP_POST_ROUTING;
+ }
+ }
+
+ tail = NLMSG_TAIL(n);
+ addattr_l(n, MAX_MSG, tca_id, NULL, 0);
+ fprintf(stdout, "tablename: %s hook: %s\n ", tname, ipthooks[hook]);
+ fprintf(stdout, "\ttarget: ");
+
+ if (m)
+ m->print(NULL, m->t, 0);
+ fprintf(stdout, " index %d\n", index);
+
+ if (strlen(tname) > 16) {
+ size = 16;
+ k[15] = 0;
+ } else {
+ size = 1 + strlen(tname);
+ }
+ strncpy(k, tname, size);
+
+ addattr_l(n, MAX_MSG, TCA_IPT_TABLE, k, size);
+ addattr_l(n, MAX_MSG, TCA_IPT_HOOK, &hook, 4);
+ addattr_l(n, MAX_MSG, TCA_IPT_INDEX, &index, 4);
+ if (m)
+ addattr_l(n, MAX_MSG, TCA_IPT_TARG, m->t, m->t->u.target_size);
+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
+
+ argc -= optind;
+ argv += optind;
+ *argc_p = rargc - iargc;
+ *argv_p = argv;
+
+ optind = 0;
+ free_opts(opts);
+ /* Clear flags if target will be used again */
+ m->tflags=0;
+ m->used=0;
+ /* Free allocated memory */
+ if (m->t)
+ free(m->t);
+
+
+ return 0;
+
+}
+
+static int
+print_ipt(struct action_util *au,FILE * f, struct rtattr *arg)
+{
+ struct rtattr *tb[TCA_IPT_MAX + 1];
+ struct xt_entry_target *t = NULL;
+
+ if (arg == NULL)
+ return -1;
+
+ set_lib_dir();
+
+ parse_rtattr_nested(tb, TCA_IPT_MAX, arg);
+
+ if (tb[TCA_IPT_TABLE] == NULL) {
+ fprintf(f, "[NULL ipt table name ] assuming mangle ");
+ } else {
+ fprintf(f, "tablename: %s ",
+ (char *) RTA_DATA(tb[TCA_IPT_TABLE]));
+ }
+
+ if (tb[TCA_IPT_HOOK] == NULL) {
+ fprintf(f, "[NULL ipt hook name ]\n ");
+ return -1;
+ } else {
+ __u32 hook;
+ hook = *(__u32 *) RTA_DATA(tb[TCA_IPT_HOOK]);
+ fprintf(f, " hook: %s \n", ipthooks[hook]);
+ }
+
+ if (tb[TCA_IPT_TARG] == NULL) {
+ fprintf(f, "\t[NULL ipt target parameters ] \n");
+ return -1;
+ } else {
+ struct xtables_target *m = NULL;
+ t = RTA_DATA(tb[TCA_IPT_TARG]);
+ m = find_target(t->u.user.name, TRY_LOAD);
+ if (NULL != m) {
+ if (0 > build_st(m, t)) {
+ fprintf(stderr, " %s error \n", m->name);
+ return -1;
+ }
+
+ opts =
+ merge_options(opts, m->extra_opts,
+ &m->option_offset);
+ } else {
+ fprintf(stderr, " failed to find target %s\n\n",
+ t->u.user.name);
+ return -1;
+ }
+ fprintf(f, "\ttarget ");
+ m->print(NULL, m->t, 0);
+ if (tb[TCA_IPT_INDEX] == NULL) {
+ fprintf(f, " [NULL ipt target index ]\n");
+ } else {
+ __u32 index;
+ index = *(__u32 *) RTA_DATA(tb[TCA_IPT_INDEX]);
+ fprintf(f, " \n\tindex %d", index);
+ }
+
+ if (tb[TCA_IPT_CNT]) {
+ struct tc_cnt *c = RTA_DATA(tb[TCA_IPT_CNT]);;
+ fprintf(f, " ref %d bind %d", c->refcnt, c->bindcnt);
+ }
+ if (show_stats) {
+ if (tb[TCA_IPT_TM]) {
+ struct tcf_t *tm = RTA_DATA(tb[TCA_IPT_TM]);
+ print_tm(f,tm);
+ }
+ }
+ fprintf(f, " \n");
+
+ }
+ free_opts(opts);
+
+ return 0;
+}
+
+struct action_util ipt_action_util = {
+ .id = "ipt",
+ .parse_aopt = parse_ipt,
+ .print_aopt = print_ipt,
+};
+
projects / lisovros / iproute2_canprio.git / commitdiff