--- /dev/null
+/*
+ *
+ * Connection Manager
+ *
+ * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <getopt.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <xtables.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+#include "connman.h"
+
+
+static const char *hooknames[] = {
+ [NF_IP_PRE_ROUTING] = "PREROUTING",
+ [NF_IP_LOCAL_IN] = "INPUT",
+ [NF_IP_FORWARD] = "FORWARD",
+ [NF_IP_LOCAL_OUT] = "OUTPUT",
+ [NF_IP_POST_ROUTING] = "POSTROUTING",
+};
+
+#define LABEL_ACCEPT "ACCEPT"
+#define LABEL_DROP "DROP"
+#define LABEL_QUEUE "QUEUE"
+#define LABEL_RETURN "RETURN"
+
+/* fn returns 0 to continue iteration */
+#define _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
+({ \
+ unsigned int __i; \
+ int __n; \
+ int __ret = 0; \
+ type *__entry; \
+ \
+ for (__i = 0, __n = 0; __i < (size); \
+ __i += __entry->next_offset, __n++) { \
+ __entry = (void *)(entries) + __i; \
+ if (__n < n) \
+ continue; \
+ \
+ __ret = fn(__entry, ## args); \
+ if (__ret != 0) \
+ break; \
+ } \
+ __ret; \
+})
+
+/* fn returns 0 to continue iteration */
+#define _XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
+ _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
+
+#define ENTRY_ITERATE(entries, size, fn, args...) \
+ _XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
+
+#define MIN_ALIGN (__alignof__(struct ipt_entry))
+
+#define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
+
+struct ipt_error_target {
+ struct xt_entry_target t;
+ char error[IPT_TABLE_MAXNAMELEN];
+};
+
+struct connman_iptables_entry {
+ int jump_offset;
+
+ struct ipt_entry *entry;
+};
+
+struct connman_iptables {
+ int ipt_sock;
+
+ struct ipt_getinfo *info;
+ struct ipt_get_entries *blob_entries;
+
+ unsigned int num_entries;
+ unsigned int old_entries;
+ unsigned int size;
+
+ GList *entries;
+};
+
+static GHashTable *table_hash = NULL;
+
+static struct ipt_entry *get_entry(struct connman_iptables *table,
+ unsigned int offset)
+{
+ return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
+ offset);
+}
+
+static int is_hook_entry(struct connman_iptables *table,
+ struct ipt_entry *entry)
+{
+ unsigned int i;
+
+ for (i = 0; i < NF_INET_NUMHOOKS; i++) {
+ if ((table->info->valid_hooks & (1 << i))
+ && get_entry(table, table->info->hook_entry[i]) == entry)
+ return i;
+ }
+
+ return -1;
+}
+
+static unsigned long entry_to_offset(struct connman_iptables *table,
+ struct ipt_entry *entry)
+{
+ return (void *)entry - (void *)table->blob_entries->entrytable;
+}
+
+static int target_to_verdict(char *target_name)
+{
+ if (!strcmp(target_name, LABEL_ACCEPT))
+ return -NF_ACCEPT - 1;
+
+ if (!strcmp(target_name, LABEL_DROP))
+ return -NF_DROP - 1;
+
+ if (!strcmp(target_name, LABEL_QUEUE))
+ return -NF_QUEUE - 1;
+
+ if (!strcmp(target_name, LABEL_RETURN))
+ return XT_RETURN;
+
+ return 0;
+}
+
+static gboolean is_builtin_target(char *target_name)
+{
+ if (!strcmp(target_name, LABEL_ACCEPT) ||
+ !strcmp(target_name, LABEL_DROP) ||
+ !strcmp(target_name, LABEL_QUEUE) ||
+ !strcmp(target_name, LABEL_RETURN))
+ return TRUE;
+
+ return FALSE;
+}
+
+static gboolean is_chain(struct connman_iptables *table,
+ struct connman_iptables_entry *e)
+{
+ int builtin;
+ struct ipt_entry *entry;
+ struct xt_entry_target *target;
+
+ entry = e->entry;
+ builtin = is_hook_entry(table, entry);
+ if (builtin >= 0)
+ return TRUE;
+
+ target = ipt_get_target(entry);
+ if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
+ return TRUE;
+
+ return FALSE;
+}
+
+static GList *find_chain_tail(struct connman_iptables *table,
+ char *chain_name)
+{
+ GList *chain_head, *list;
+ struct connman_iptables_entry *head, *tail;
+ struct ipt_entry *entry;
+ struct xt_entry_target *target;
+ int builtin;
+
+ /* First we look for the head */
+ for (list = table->entries; list; list = list->next) {
+ head = list->data;
+ entry = head->entry;
+
+ /* Buit-in chain */
+ builtin = is_hook_entry(table, entry);
+ if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
+ break;
+
+ /* User defined chain */
+ target = ipt_get_target(entry);
+ if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
+ !strcmp((char *)target->data, chain_name))
+ break;
+ }
+
+ if (list == NULL)
+ return NULL;
+
+ chain_head = list;
+
+ /* Then we look for the next chain */
+ for (list = chain_head->next; list; list = list->next) {
+ tail = list->data;
+ entry = tail->entry;
+
+ if (is_chain(table, tail))
+ return list;
+ }
+
+ /* Nothing found, we return the table end */
+ return g_list_last(table->entries);
+}
+
+static int iptables_add_entry(struct connman_iptables *table,
+ struct ipt_entry *entry, GList *before)
+{
+ struct connman_iptables_entry *e;
+
+ if (table == NULL)
+ return -1;
+
+ e = g_try_malloc0(sizeof(struct connman_iptables_entry));
+ if (e == NULL)
+ return -1;
+
+ e->entry = entry;
+
+ table->entries = g_list_insert_before(table->entries, before, e);
+ table->num_entries++;
+ table->size += entry->next_offset;
+
+ return 0;
+}
+
+static int iptables_add_chain(struct connman_iptables *table,
+ char *name)
+{
+ GList *last;
+ struct ipt_entry *entry_head;
+ struct ipt_entry *entry_return;
+ struct ipt_error_target *error;
+ struct ipt_standard_target *standard;
+ u_int16_t entry_head_size, entry_return_size;
+
+ last = g_list_last(table->entries);
+
+ /*
+ * An empty chain is composed of:
+ * - A head entry, with no match and an error target.
+ * The error target data is the chain name.
+ * - A tail entry, with no match and a standard target.
+ * The standard target verdict is XT_RETURN (return to the
+ * caller).
+ */
+
+ /* head entry */
+ entry_head_size = sizeof(struct ipt_entry) +
+ sizeof(struct ipt_error_target);
+ entry_head = g_try_malloc0(entry_head_size);
+ if (entry_head == NULL)
+ goto err;
+
+ memset(entry_head, 0, entry_head_size);
+
+ entry_head->target_offset = sizeof(struct ipt_entry);
+ entry_head->next_offset = entry_head_size;
+
+ error = (struct ipt_error_target *) entry_head->elems;
+ strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
+ error->t.u.user.target_size = ALIGN(sizeof(struct ipt_error_target));
+ strcpy(error->error, name);
+
+ if (iptables_add_entry(table, entry_head, last) < 0)
+ goto err;
+
+ /* tail entry */
+ entry_return_size = sizeof(struct ipt_entry) +
+ sizeof(struct ipt_standard_target);
+ entry_return = g_try_malloc0(entry_return_size);
+ if (entry_return == NULL)
+ goto err;
+
+ memset(entry_return, 0, entry_return_size);
+
+ entry_return->target_offset = sizeof(struct ipt_entry);
+ entry_return->next_offset = entry_return_size;
+
+ standard = (struct ipt_standard_target *) entry_return->elems;
+ standard->target.u.user.target_size =
+ ALIGN(sizeof(struct ipt_standard_target));
+ standard->verdict = XT_RETURN;
+
+ if (iptables_add_entry(table, entry_return, last) < 0)
+ goto err;
+
+ return 0;
+
+err:
+ g_free(entry_head);
+ g_free(entry_return);
+
+ return -ENOMEM;
+}
+
+static struct ipt_entry *
+new_builtin_rule(char *target_name, struct xtables_match *xt_m)
+{
+ struct ipt_entry *entry;
+ size_t match_size, target_size;
+ struct xt_entry_match *entry_match;
+ struct xt_standard_target *target;
+
+ if (xt_m)
+ match_size = xt_m->m->u.match_size;
+ else
+ match_size = 0;
+
+ target_size = ALIGN(sizeof(struct xt_standard_target));
+
+ entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
+ match_size);
+ if (entry == NULL)
+ return NULL;
+
+ entry->target_offset = sizeof(struct ipt_entry) + match_size;
+ entry->next_offset = sizeof(struct ipt_entry) + target_size +
+ match_size;
+ if (xt_m) {
+ entry_match = (struct xt_entry_match *)entry->elems;
+ memcpy(entry_match, xt_m->m, match_size);
+ }
+
+ target = (struct xt_standard_target *)ipt_get_target(entry);
+ strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
+ target->target.u.user.target_size =
+ ALIGN(sizeof(struct ipt_standard_target));
+ target->verdict = target_to_verdict(target_name);
+
+ return entry;
+}
+
+static struct ipt_entry *
+new_custom_rule(struct xtables_target *xt_t, struct xtables_match *xt_m)
+{
+ struct ipt_entry *entry;
+ size_t match_size, target_size;
+ struct xt_entry_match *entry_match;
+ struct xt_entry_target *entry_target;
+
+ if (xt_m)
+ match_size = xt_m->m->u.match_size;
+ else
+ match_size = 0;
+
+ if (xt_t)
+ target_size = ALIGN(xt_t->t->u.target_size);
+ else
+ target_size = 0;
+
+ entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
+ match_size);
+ if (entry == NULL)
+ return NULL;
+
+ entry->target_offset = sizeof(struct ipt_entry) + match_size;
+ entry->next_offset = sizeof(struct ipt_entry) + target_size +
+ match_size;
+ if (xt_m) {
+ entry_match = (struct xt_entry_match *)entry->elems;
+ memcpy(entry_match, xt_m->m, match_size);
+ }
+
+ if (xt_t) {
+ entry_target = ipt_get_target(entry);
+ memcpy(entry_target, xt_t->t, target_size);
+ }
+
+ return entry;
+}
+
+static struct ipt_entry *
+new_rule(char *target_name, struct xtables_target *xt_t,
+ char *match_name, struct xtables_match *xt_m)
+{
+ struct ipt_entry *new_entry;
+
+ if (is_builtin_target(target_name))
+ new_entry = new_builtin_rule(target_name, xt_m);
+ else
+ new_entry = new_custom_rule(xt_t, xt_m);
+
+ return new_entry;
+}
+
+static int
+iptables_add_rule(struct connman_iptables *table, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ char *match_name, struct xtables_match *xt_m)
+{
+ GList *chain_tail;
+ struct ipt_entry *new_entry;
+
+ chain_tail = find_chain_tail(table, chain_name);
+ if (chain_tail == NULL)
+ return -EINVAL;
+
+ new_entry = new_rule(target_name, xt_t,
+ match_name, xt_m);
+ if (new_entry == NULL)
+ return -EINVAL;
+
+ return iptables_add_entry(table, new_entry, chain_tail->prev);
+}
+
+static struct ipt_replace *
+iptables_blob(struct connman_iptables *table)
+{
+ struct ipt_replace *r;
+ GList *list;
+ struct connman_iptables_entry *e;
+ unsigned char *entry_index;
+
+ r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
+ if (r == NULL)
+ return NULL;
+
+ memset(r, 0, sizeof(*r) + table->size);
+
+ r->counters = g_try_malloc0(sizeof(struct xt_counters)
+ * table->num_entries);
+ if (r->counters == NULL) {
+ g_free(r);
+ return NULL;
+ }
+
+ strcpy(r->name, table->info->name);
+ r->num_entries = table->num_entries;
+ r->size = table->size;
+
+ r->num_counters = table->old_entries;
+ r->valid_hooks = table->info->valid_hooks;
+
+ memcpy(r->hook_entry, table->info->hook_entry,
+ sizeof(table->info->hook_entry));
+ memcpy(r->underflow, table->info->underflow,
+ sizeof(table->info->underflow));
+
+ entry_index = (unsigned char *)r->entries;
+ for (list = table->entries; list; list = list->next) {
+ e = list->data;
+
+ memcpy(entry_index, e->entry, e->entry->next_offset);
+ entry_index += e->entry->next_offset;
+ }
+
+ return r;
+}
+
+static void dump_target(struct connman_iptables *table,
+ struct ipt_entry *entry)
+
+{
+ struct xtables_target *xt_t;
+ struct xt_entry_target *target;
+
+ target = ipt_get_target(entry);
+
+ if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
+ struct xt_standard_target *t;
+
+ t = (struct xt_standard_target *)target;
+
+ switch (t->verdict) {
+ case XT_RETURN:
+ connman_info("\ttarget RETURN");
+ break;
+
+ case -NF_ACCEPT - 1:
+ connman_info("\ttarget ACCEPT");
+ break;
+
+ case -NF_DROP - 1:
+ connman_info("\ttarget DROP");
+ break;
+
+ case -NF_QUEUE - 1:
+ connman_info("\ttarget QUEUE");
+ break;
+
+ case -NF_STOP - 1:
+ connman_info("\ttarget STOP");
+ break;
+
+ default:
+ connman_info("\tJUMP @%p (0x%x)",
+ (char*)table->blob_entries->entrytable +
+ t->verdict, t->verdict);
+ break;
+ }
+
+ xt_t = xtables_find_target(IPT_STANDARD_TARGET,
+ XTF_LOAD_MUST_SUCCEED);
+
+ if(xt_t->print != NULL)
+ xt_t->print(NULL, target, 1);
+ } else {
+ xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
+ if (xt_t == NULL) {
+ connman_info("\ttarget %s", target->u.user.name);
+ return;
+ }
+
+ if(xt_t->print != NULL) {
+ connman_info("\ttarget ");
+ xt_t->print(NULL, target, 1);
+ }
+ }
+}
+
+static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
+{
+ struct xtables_match *xt_m;
+ struct xt_entry_match *match;
+
+ if (entry->elems == (unsigned char *)entry + entry->target_offset)
+ return;
+
+ match = (struct xt_entry_match *) entry->elems;
+
+ if (!strlen(match->u.user.name))
+ return;
+
+ xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
+ if (xt_m == NULL)
+ goto out;
+
+ if(xt_m->print != NULL) {
+ connman_info("\tmatch ");
+ xt_m->print(NULL, match, 1);
+
+ return;
+ }
+
+out:
+ connman_info("\tmatch %s", match->u.user.name);
+
+}
+
+static int dump_entry(struct ipt_entry *entry,
+ struct connman_iptables *table)
+{
+ struct xt_entry_target *target;
+ unsigned int offset;
+ int builtin;
+
+ offset = (char *)entry - (char *)table->blob_entries->entrytable;
+ target = ipt_get_target(entry);
+ builtin = is_hook_entry(table, entry);
+
+ if (entry_to_offset(table, entry) + entry->next_offset ==
+ table->blob_entries->size) {
+ connman_info("End of CHAIN 0x%x", offset);
+ return 0;
+ }
+
+ if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
+ connman_info("USER CHAIN (%s) %p match %p target %p size %d",
+ target->data, entry, entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+
+ return 0;
+ } else if (builtin >= 0) {
+ connman_info("CHAIN (%s) %p match %p target %p size %d",
+ hooknames[builtin], entry, entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+ } else {
+ connman_info("RULE %p match %p target %p size %d", entry,
+ entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+ }
+
+ dump_match(table, entry);
+ dump_target(table, entry);
+
+ return 0;
+}
+
+static void iptables_dump(struct connman_iptables *table)
+{
+ connman_info("%s valid_hooks=0x%08x, num_entries=%u, size=%u",
+ table->info->name,
+ table->info->valid_hooks, table->info->num_entries,
+ table->info->size);
+
+ ENTRY_ITERATE(table->blob_entries->entrytable,
+ table->blob_entries->size,
+ dump_entry, table);
+
+}
+
+static int iptables_get_entries(struct connman_iptables *table)
+{
+ socklen_t entry_size;
+
+ entry_size = sizeof(struct ipt_get_entries) + table->info->size;
+
+ return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
+ table->blob_entries, &entry_size);
+}
+
+static int iptables_replace(struct connman_iptables *table,
+ struct ipt_replace *r)
+{
+ return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
+ sizeof(*r) + r->size);
+}
+
+static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
+{
+ struct ipt_entry *new_entry;
+
+ new_entry = g_try_malloc0(entry->next_offset);
+ if (new_entry == NULL)
+ return -ENOMEM;
+
+ memcpy(new_entry, entry, entry->next_offset);
+
+ return iptables_add_entry(table, new_entry, NULL);
+}
+
+static void table_cleanup(struct connman_iptables *table)
+{
+ GList *list;
+ struct connman_iptables_entry *entry;
+
+ close(table->ipt_sock);
+
+ for (list = table->entries; list; list = list->next) {
+ entry = list->data;
+
+ g_free(entry->entry);
+ }
+
+ g_list_free(table->entries);
+ g_free(table->info);
+ g_free(table->blob_entries);
+ g_free(table);
+}
+
+static struct connman_iptables *iptables_init(char *table_name)
+{
+ struct connman_iptables *table;
+ socklen_t s;
+
+ table = g_hash_table_lookup(table_hash, table_name);
+ if (table != NULL)
+ return table;
+
+ table = g_try_new0(struct connman_iptables, 1);
+ if (table == NULL)
+ return NULL;
+
+ table->info = g_try_new0(struct ipt_getinfo, 1);
+ if (table->info == NULL)
+ goto err;
+
+ table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
+ if (table->ipt_sock < 0)
+ goto err;
+
+ s = sizeof(*table->info);
+ strcpy(table->info->name, table_name);
+ if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
+ table->info, &s) < 0)
+ goto err;
+
+ table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
+ table->info->size);
+ if (table->blob_entries == NULL)
+ goto err;
+
+ strcpy(table->blob_entries->name, table_name);
+ table->blob_entries->size = table->info->size;
+
+ if (iptables_get_entries(table) < 0)
+ goto err;
+
+ table->num_entries = 0;
+ table->old_entries = table->info->num_entries;
+ table->size = 0;
+
+ ENTRY_ITERATE(table->blob_entries->entrytable,
+ table->blob_entries->size,
+ add_entry, table);
+
+ g_hash_table_insert(table_hash, table_name, table);
+
+ return table;
+
+err:
+
+ table_cleanup(table);
+
+ return NULL;
+}
+
+static struct option iptables_opts[] = {
+ {.name = "append", .has_arg = 1, .val = 'A'},
+ {.name = "list", .has_arg = 2, .val = 'L'},
+ {.name = "new-chain", .has_arg = 1, .val = 'N'},
+ {.name = "in-interface", .has_arg = 1, .val = 'i'},
+ {.name = "jump", .has_arg = 1, .val = 'j'},
+ {.name = "match", .has_arg = 1, .val = 'm'},
+ {.name = "out-interface", .has_arg = 1, .val = 'o'},
+ {.name = "table", .has_arg = 1, .val = 't'},
+ {NULL},
+};
+
+struct xtables_globals iptables_globals = {
+ .option_offset = 0,
+ .opts = iptables_opts,
+ .orig_opts = iptables_opts,
+};
+
+static int iptables_command(int argc, char *argv[])
+{
+ struct connman_iptables *table;
+ struct xtables_match *xt_m;
+ struct xtables_target *xt_t;
+ char *table_name, *chain, *new_chain, *match_name, *target_name;
+ int c, ret;
+ size_t size;
+ gboolean dump, invert;
+
+ if (argc == 0)
+ return -EINVAL;
+
+ dump = FALSE;
+ invert = FALSE;
+ table_name = chain = new_chain = match_name = target_name = NULL;
+ table = NULL;
+ xt_m = NULL;
+ xt_t = NULL;
+ ret = 0;
+
+ optind = 0;
+
+ while ((c = getopt_long(argc, argv,
+ "-A:L::N:j:i:m:o:t:", iptables_globals.opts, NULL)) != -1) {
+ switch (c) {
+ case 'A':
+ chain = optarg;
+ break;
+
+ case 'L':
+ dump = TRUE;
+ break;
+
+ case 'N':
+ new_chain = optarg;
+ break;
+
+ case 'j':
+ target_name = optarg;
+ xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
+
+ if (xt_t == NULL)
+ break;
+
+ size = ALIGN(sizeof(struct ipt_entry_target)) +
+ xt_t->size;
+
+ xt_t->t = g_try_malloc0(size);
+ if (xt_t->t == NULL)
+ goto out;
+ xt_t->t->u.target_size = size;
+ strcpy(xt_t->t->u.user.name, target_name);
+ xt_t->t->u.user.revision = xt_t->revision;
+ if (xt_t->init != NULL)
+ xt_t->init(xt_t->t);
+ iptables_globals.opts =
+ xtables_merge_options(iptables_globals.opts,
+ xt_t->extra_opts,
+ &xt_t->option_offset);
+ if (iptables_globals.opts == NULL)
+ goto out;
+
+ break;
+
+ case 'i':
+ break;
+
+ case 'm':
+ match_name = optarg;
+
+ xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
+ size = ALIGN(sizeof(struct ipt_entry_match)) +
+ xt_m->size;
+ xt_m->m = g_try_malloc0(size);
+ if (xt_m == NULL)
+ goto out;
+ xt_m->m->u.match_size = size;
+ strcpy(xt_m->m->u.user.name, xt_m->name);
+ xt_m->m->u.user.revision = xt_m->revision;
+ if (xt_m->init != NULL)
+ xt_m->init(xt_m->m);
+ if (xt_m != xt_m->next) {
+ iptables_globals.opts =
+ xtables_merge_options(iptables_globals.opts,
+ xt_m->extra_opts,
+ &xt_m->option_offset);
+ if (iptables_globals.opts == NULL)
+ goto out;
+ }
+
+ break;
+
+ case 'o':
+ break;
+
+ case 't':
+ table_name = optarg;
+ break;
+
+ case 1:
+ if (optarg[0] == '!' && optarg[1] == '\0') {
+ invert = TRUE;
+ optarg[0] = '\0';
+ continue;
+ }
+
+ connman_error("Invalid option");
+
+ ret = -EINVAL;
+ goto out;
+
+ default:
+ if (xt_t == NULL || xt_t->parse == NULL ||
+ !xt_t->parse(c - xt_t->option_offset, argv, invert,
+ &xt_t->tflags, NULL, &xt_t->t)) {
+ if (xt_m == NULL || xt_m->parse == NULL)
+ break;
+
+ xt_m->parse(c - xt_m->option_offset, argv,
+ invert, &xt_m->mflags, NULL, &xt_m->m);
+ }
+
+ break;
+ }
+ }
+
+ if (table_name == NULL)
+ table_name = "filter";
+
+ table = iptables_init(table_name);
+ if (table == NULL) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (dump) {
+ iptables_dump(table);
+
+ ret = 0;
+ goto out;
+ }
+
+ if (chain && new_chain) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (new_chain) {
+ DBG("New chain %s", new_chain);
+
+ ret = iptables_add_chain(table, new_chain);
+ goto out;
+ }
+
+ if (chain) {
+ if (target_name == NULL)
+ return -1;
+
+ DBG("Adding %s to %s (match %s)",
+ target_name, chain, match_name);
+
+ ret = iptables_add_rule(table, chain, target_name, xt_t,
+ match_name, xt_m);
+
+ goto out;
+ }
+
+out:
+ if (xt_t)
+ g_free(xt_t->t);
+
+ if (xt_m)
+ g_free(xt_m->m);
+
+ return ret;
+}
+
+int __connman_iptables_command(char *command)
+{
+ char **argv, **arguments;
+ int argc, i, ret;
+
+ if (command == NULL)
+ return -EINVAL;
+
+ arguments = g_strsplit_set(command, " ", -1);
+
+ for (argc = 0; arguments[argc]; argc++);
+
+ DBG("command %s argc %d", command, ++argc);
+
+ argv = g_try_malloc0(argc * sizeof(char *));
+ if (argv == NULL) {
+ g_strfreev(arguments);
+ return -ENOMEM;
+ }
+
+ argv[0] = "iptables";
+ for (i = 1; i < argc; i++)
+ argv[i] = arguments[i - 1];
+
+ ret = iptables_command(argc, argv);
+
+ g_strfreev(arguments);
+ g_free(argv);
+
+ return ret;
+}
+
+
+int __connman_iptables_commit(char *table_name)
+{
+ struct connman_iptables *table;
+ struct ipt_replace *repl;
+
+ table = g_hash_table_lookup(table_hash, table_name);
+ if (table == NULL)
+ return -EINVAL;
+
+ repl = iptables_blob(table);
+
+ return iptables_replace(table, repl);
+}
+
+static void remove_table(gpointer user_data)
+{
+ struct connman_iptables *table = user_data;
+
+ table_cleanup(table);
+}
+
+int __connman_iptables_init(void)
+{
+ DBG("");
+
+ table_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
+ NULL, remove_table);
+
+ xtables_init_all(&iptables_globals, NFPROTO_IPV4);
+
+ return 0;
+
+}
+
+void __connman_iptables_cleanup(void)
+{
+ g_hash_table_destroy(table_hash);
+
+ xtables_free_opts(1);
+}
projects / framework / connectivity / connman.git / commitdiff