/*
* Connection Manager
*
- * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2012 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
*
*/
+#include <getopt.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/errno.h>
-#include <libiptc/libiptc.h>
-#include <libiptc/libip6tc.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
#include <xtables.h>
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/xt_quota.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
-static void print_match(const struct ipt_entry *e)
+#include <glib.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"
+
+#define XT_OPTION_OFFSET_SCALE 256
+
+/* 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 error_target {
+ struct xt_entry_target t;
+ char error[IPT_TABLE_MAXNAMELEN];
+};
+
+struct connman_iptables_entry {
+ int offset;
+ int builtin;
+
+ 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;
+
+ unsigned int underflow[NF_INET_NUMHOOKS];
+ unsigned int hook_entry[NF_INET_NUMHOOKS];
+
+ GList *entries;
+};
+
+
+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_jump(struct connman_iptables_entry *e)
+{
+ struct xt_entry_target *target;
+
+ target = ipt_get_target(e->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:
+ case -NF_ACCEPT - 1:
+ case -NF_DROP - 1:
+ case -NF_QUEUE - 1:
+ case -NF_STOP - 1:
+ return false;
+
+ default:
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static gboolean is_chain(struct connman_iptables *table,
+ struct connman_iptables_entry *e)
+{
+ struct ipt_entry *entry;
+ struct xt_entry_target *target;
+
+ entry = e->entry;
+ if (e->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_head(struct connman_iptables *table,
+ char *chain_name)
+{
+ GList *list;
+ struct connman_iptables_entry *head;
+ struct ipt_entry *entry;
+ struct xt_entry_target *target;
+ int builtin;
+
+ for (list = table->entries; list; list = list->next) {
+ head = list->data;
+ entry = head->entry;
+
+ /* Buit-in chain */
+ builtin = head->builtin;
+ 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;
+ }
+
+ return list;
+}
+
+static GList *find_chain_tail(struct connman_iptables *table,
+ char *chain_name)
+{
+ GList *chain_head, *list;
+ struct connman_iptables_entry *tail;
+
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return NULL;
+
+ /* Then we look for the next chain */
+ for (list = chain_head->next; list; list = list->next) {
+ tail = list->data;
+
+ if (is_chain(table, tail))
+ return list;
+ }
+
+ /* Nothing found, we return the table end */
+ return g_list_last(table->entries);
+}
+
+static void update_offsets(struct connman_iptables *table)
+{
+ GList *list, *prev;
+ struct connman_iptables_entry *entry, *prev_entry;
+
+ for (list = table->entries; list; list = list->next) {
+ entry = list->data;
+
+ if (list == table->entries) {
+ entry->offset = 0;
+
+ continue;
+ }
+
+ prev = list->prev;
+ prev_entry = prev->data;
+
+ entry->offset = prev_entry->offset +
+ prev_entry->entry->next_offset;
+ }
+}
+
+static void update_targets_reference(struct connman_iptables *table,
+ struct connman_iptables_entry *entry_before,
+ struct connman_iptables_entry *modified_entry,
+ gboolean is_removing)
+{
+ struct connman_iptables_entry *tmp;
+ struct xt_standard_target *t;
+ GList *list;
+ int offset;
+
+ offset = modified_entry->entry->next_offset;
+
+ for (list = table->entries; list; list = list->next) {
+ tmp = list->data;
+
+ if (!is_jump(tmp))
+ continue;
+
+ t = (struct xt_standard_target *)ipt_get_target(tmp->entry);
+
+ if (is_removing == TRUE) {
+ if (t->verdict >= entry_before->offset)
+ t->verdict -= offset;
+ } else {
+ if (t->verdict > entry_before->offset)
+ t->verdict += offset;
+ }
+ }
+}
+
+static int connman_add_entry(struct connman_iptables *table,
+ struct ipt_entry *entry, GList *before,
+ int builtin)
+{
+ struct connman_iptables_entry *e, *entry_before;
+
+ if (table == NULL)
+ return -1;
+
+ e = g_try_malloc0(sizeof(struct connman_iptables_entry));
+ if (e == NULL)
+ return -1;
+
+ e->entry = entry;
+ e->builtin = builtin;
+
+ table->entries = g_list_insert_before(table->entries, before, e);
+ table->num_entries++;
+ table->size += entry->next_offset;
+
+ if (before == NULL) {
+ e->offset = table->size - entry->next_offset;
+
+ return 0;
+ }
+
+ entry_before = before->data;
+
+ /*
+ * We've just appended/insterted a new entry. All references
+ * should be bumped accordingly.
+ */
+ update_targets_reference(table, entry_before, e, FALSE);
+
+ update_offsets(table);
+
+ return 0;
+}
+
+static int remove_table_entry(struct connman_iptables *table,
+ struct connman_iptables_entry *entry)
+{
+ int removed = 0;
+
+ table->num_entries--;
+ table->size -= entry->entry->next_offset;
+ removed = entry->entry->next_offset;
+
+ g_free(entry->entry);
+
+ table->entries = g_list_remove(table->entries, entry);
+
+ return removed;
+}
+
+static int connman_iptables_flush_chain(struct connman_iptables *table,
+ char *name)
+{
+ GList *chain_head, *chain_tail, *list, *next;
+ struct connman_iptables_entry *entry;
+ int builtin, removed = 0;
+
+ chain_head = find_chain_head(table, name);
+ if (chain_head == NULL)
+ return -EINVAL;
+
+ chain_tail = find_chain_tail(table, name);
+ if (chain_tail == NULL)
+ return -EINVAL;
+
+ entry = chain_head->data;
+ builtin = entry->builtin;
+
+ if (builtin >= 0)
+ list = chain_head;
+ else
+ list = chain_head->next;
+
+ if (list == chain_tail->prev)
+ return 0;
+
+ while (list != chain_tail->prev) {
+ entry = list->data;
+ next = g_list_next(list);
+
+ removed += remove_table_entry(table, entry);
+
+ list = next;
+ }
+
+ if (builtin >= 0) {
+ struct connman_iptables_entry *e;
+
+ entry = list->data;
+
+ entry->builtin = builtin;
+
+ table->underflow[builtin] -= removed;
+
+ for (list = chain_tail; list; list = list->next) {
+ e = list->data;
+
+ builtin = e->builtin;
+ if (builtin < 0)
+ continue;
+
+ table->hook_entry[builtin] -= removed;
+ table->underflow[builtin] -= removed;
+ }
+ }
+
+ update_offsets(table);
+
+ return 0;
+}
+
+static int connman_iptables_delete_chain(struct connman_iptables *table,
+ char *name)
+{
+ GList *chain_head, *chain_tail;
+ struct connman_iptables_entry *entry;
+
+ chain_head = find_chain_head(table, name);
+ if (chain_head == NULL)
+ return -EINVAL;
+
+ entry = chain_head->data;
+
+ /* We cannot remove builtin chain */
+ if (entry->builtin >= 0)
+ return -EINVAL;
+
+ chain_tail = find_chain_tail(table, name);
+ if (chain_tail == NULL)
+ return -EINVAL;
+
+ /* Chain must be flushed */
+ if (chain_head->next != chain_tail->prev)
+ return -EINVAL;
+
+ remove_table_entry(table, entry);
+
+ entry = chain_tail->prev->data;
+ remove_table_entry(table, entry);
+
+ update_offsets(table);
+
+ return 0;
+}
+
+static int connman_iptables_add_chain(struct connman_iptables *table,
+ char *name)
+{
+ GList *last;
+ struct ipt_entry *entry_head;
+ struct ipt_entry *entry_return;
+ struct 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 error_target);
+ entry_head = g_try_malloc0(entry_head_size);
+ if (entry_head == NULL)
+ goto err_head;
+
+ memset(entry_head, 0, entry_head_size);
+
+ entry_head->target_offset = sizeof(struct ipt_entry);
+ entry_head->next_offset = entry_head_size;
+
+ error = (struct error_target *) entry_head->elems;
+ strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
+ error->t.u.user.target_size = ALIGN(sizeof(struct error_target));
+ strcpy(error->error, name);
+
+ if (connman_add_entry(table, entry_head, last, -1) < 0)
+ goto err_head;
+
+ /* 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 (connman_add_entry(table, entry_return, last, -1) < 0)
+ goto err;
+
+ return 0;
+
+err:
+ g_free(entry_return);
+err_head:
+ g_free(entry_head);
+
+ return -ENOMEM;
+}
+
+static struct ipt_entry *new_rule(struct ipt_ip *ip,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_rule_match *xt_rm)
+{
+ struct xtables_rule_match *tmp_xt_rm;
+ struct ipt_entry *new_entry;
+ size_t match_size, target_size;
+
+ match_size = 0;
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL; tmp_xt_rm = tmp_xt_rm->next)
+ match_size += tmp_xt_rm->match->m->u.match_size;
+
+ if (xt_t)
+ target_size = ALIGN(xt_t->t->u.target_size);
+ else
+ target_size = ALIGN(sizeof(struct xt_standard_target));
+
+ new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
+ match_size);
+ if (new_entry == NULL)
+ return NULL;
+
+ memcpy(&new_entry->ip, ip, sizeof(struct ipt_ip));
+
+ new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
+ new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
+ match_size;
+
+ match_size = 0;
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
+ tmp_xt_rm = tmp_xt_rm->next) {
+ memcpy(new_entry->elems + match_size, tmp_xt_rm->match->m,
+ tmp_xt_rm->match->m->u.match_size);
+ match_size += tmp_xt_rm->match->m->u.match_size;
+ }
+
+ if (xt_t) {
+ struct xt_entry_target *entry_target;
+
+ entry_target = ipt_get_target(new_entry);
+ memcpy(entry_target, xt_t->t, target_size);
+ }
+
+ return new_entry;
+}
+
+static void update_hooks(struct connman_iptables *table, GList *chain_head,
+ struct ipt_entry *entry)
+{
+ GList *list;
+ struct connman_iptables_entry *head, *e;
+ int builtin;
+
+ if (chain_head == NULL)
+ return;
+
+ head = chain_head->data;
+
+ builtin = head->builtin;
+ if (builtin < 0)
+ return;
+
+ table->underflow[builtin] += entry->next_offset;
+
+ for (list = chain_head->next; list; list = list->next) {
+ e = list->data;
+
+ builtin = e->builtin;
+ if (builtin < 0)
+ continue;
+
+ table->hook_entry[builtin] += entry->next_offset;
+ table->underflow[builtin] += entry->next_offset;
+ }
+}
+
+static struct ipt_entry *prepare_rule_inclusion(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ int *builtin, struct xtables_rule_match *xt_rm)
+{
+ GList *chain_tail, *chain_head;
+ struct ipt_entry *new_entry;
+ struct connman_iptables_entry *head;
+
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return NULL;
+
+ chain_tail = find_chain_tail(table, chain_name);
+ if (chain_tail == NULL)
+ return NULL;
+
+ new_entry = new_rule(ip, target_name, xt_t, xt_rm);
+ if (new_entry == NULL)
+ return NULL;
+
+ update_hooks(table, chain_head, new_entry);
+
+ /*
+ * If the chain is builtin, and does not have any rule,
+ * then the one that we're inserting is becoming the head
+ * and thus needs the builtin flag.
+ */
+ head = chain_head->data;
+ if (head->builtin < 0)
+ *builtin = -1;
+ else if (chain_head == chain_tail->prev) {
+ *builtin = head->builtin;
+ head->builtin = -1;
+ }
+
+ return new_entry;
+}
+
+static int connman_iptables_append_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_rule_match *xt_rm)
+{
+ GList *chain_tail;
+ struct ipt_entry *new_entry;
+ int builtin = -1, ret;
+
+ chain_tail = find_chain_tail(table, chain_name);
+ if (chain_tail == NULL)
+ return -EINVAL;
+
+ new_entry = prepare_rule_inclusion(table, ip, chain_name,
+ target_name, xt_t, &builtin, xt_rm);
+ if (new_entry == NULL)
+ return -EINVAL;
+
+ ret = connman_add_entry(table, new_entry, chain_tail->prev, builtin);
+ if (ret < 0)
+ g_free(new_entry);
+
+ return ret;
+}
+
+static int connman_iptables_insert_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_rule_match *xt_rm)
+{
+ GList *chain_head;
+ struct ipt_entry *new_entry;
+ int builtin = -1, ret;
+
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return -EINVAL;
+
+ new_entry = prepare_rule_inclusion(table, ip, chain_name,
+ target_name, xt_t, &builtin, xt_rm);
+ if (new_entry == NULL)
+ return -EINVAL;
+
+ if (builtin == -1)
+ chain_head = chain_head->next;
+
+ ret = connman_add_entry(table, new_entry, chain_head, builtin);
+ if (ret < 0)
+ g_free(new_entry);
+
+ return ret;
+}
+
+static gboolean is_same_ipt_entry(struct ipt_entry *i_e1,
+ struct ipt_entry *i_e2)
+{
+ if (memcmp(&i_e1->ip, &i_e2->ip, sizeof(struct ipt_ip)) != 0)
+ return FALSE;
+
+ if (i_e1->target_offset != i_e2->target_offset)
+ return FALSE;
+
+ if (i_e1->next_offset != i_e2->next_offset)
+ return FALSE;
+
+ return TRUE;
+}
+
+static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
+ struct xt_entry_target *xt_e_t2)
+{
+ if (xt_e_t1 == NULL || xt_e_t2 == NULL)
+ return FALSE;
+
+ if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
+ struct xt_standard_target *xt_s_t1;
+ struct xt_standard_target *xt_s_t2;
+
+ xt_s_t1 = (struct xt_standard_target *) xt_e_t1;
+ xt_s_t2 = (struct xt_standard_target *) xt_e_t2;
+
+ if (xt_s_t1->verdict != xt_s_t2->verdict)
+ return FALSE;
+ } else {
+ if (xt_e_t1->u.target_size != xt_e_t2->u.target_size)
+ return FALSE;
+
+ if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
+ struct xt_entry_match *xt_e_m2)
+{
+ if (xt_e_m1 == NULL || xt_e_m2 == NULL)
+ return FALSE;
+
+ if (xt_e_m1->u.match_size != xt_e_m2->u.match_size)
+ return FALSE;
+
+ if (xt_e_m1->u.user.revision != xt_e_m2->u.user.revision)
+ return FALSE;
+
+ if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
+ return FALSE;
+
+ return TRUE;
+}
+
+static GList *find_existing_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_match *xt_m,
+ struct xtables_rule_match *xt_rm)
+{
+ GList *chain_tail, *chain_head, *list;
+ struct xt_entry_target *xt_e_t = NULL;
+ struct xt_entry_match *xt_e_m = NULL;
+ struct connman_iptables_entry *entry;
+ struct ipt_entry *entry_test;
+ int builtin;
+
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return NULL;
+
+ chain_tail = find_chain_tail(table, chain_name);
+ if (chain_tail == NULL)
+ return NULL;
+
+ if (!xt_t && !xt_m)
+ return NULL;
+
+ entry_test = new_rule(ip, target_name, xt_t, xt_rm);
+ if (entry_test == NULL)
+ return NULL;
+
+ if (xt_t != NULL)
+ xt_e_t = ipt_get_target(entry_test);
+ if (xt_m != NULL)
+ xt_e_m = (struct xt_entry_match *)entry_test->elems;
+
+ entry = chain_head->data;
+ builtin = entry->builtin;
+
+ if (builtin >= 0)
+ list = chain_head;
+ else
+ list = chain_head->next;
+
+ for (; list != chain_tail->prev; list = list->next) {
+ struct connman_iptables_entry *tmp;
+ struct ipt_entry *tmp_e;
+
+ tmp = list->data;
+ tmp_e = tmp->entry;
+
+ if (is_same_ipt_entry(entry_test, tmp_e) == FALSE)
+ continue;
+
+ if (xt_t != NULL) {
+ struct xt_entry_target *tmp_xt_e_t;
+
+ tmp_xt_e_t = ipt_get_target(tmp_e);
+
+ if (!is_same_target(tmp_xt_e_t, xt_e_t))
+ continue;
+ }
+
+ if (xt_m != NULL) {
+ struct xt_entry_match *tmp_xt_e_m;
+
+ tmp_xt_e_m = (struct xt_entry_match *)tmp_e->elems;
+
+ if (!is_same_match(tmp_xt_e_m, xt_e_m))
+ continue;
+ }
+
+ break;
+ }
+
+ g_free(entry_test);
+
+ if (list != chain_tail->prev)
+ return list;
+
+ return NULL;
+}
+
+static int connman_iptables_delete_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_match *xt_m,
+ struct xtables_rule_match *xt_rm)
+{
+ struct connman_iptables_entry *entry;
+ GList *chain_tail, *list;
+ int builtin, removed;
+
+ removed = 0;
+
+ chain_tail = find_chain_tail(table, chain_name);
+ if (chain_tail == NULL)
+ return -EINVAL;
+
+ list = find_existing_rule(table, ip, chain_name, target_name,
+ xt_t, xt_m, xt_rm);
+ if (list == NULL)
+ return -EINVAL;
+
+ entry = list->data;
+
+ if (entry == NULL)
+ return -EINVAL;
+
+ builtin = entry->builtin;
+
+ /* We have deleted a rule,
+ * all references should be bumped accordingly */
+ if (list->next != NULL)
+ update_targets_reference(table, list->next->data,
+ list->data, TRUE);
+
+ removed += remove_table_entry(table, entry);
+
+ if (builtin >= 0) {
+ list = list->next;
+ if (list) {
+ entry = list->data;
+ entry->builtin = builtin;
+ }
+
+ table->underflow[builtin] -= removed;
+ for (list = chain_tail; list; list = list->next) {
+ entry = list->data;
+
+ builtin = entry->builtin;
+ if (builtin < 0)
+ continue;
+
+ table->hook_entry[builtin] -= removed;
+ table->underflow[builtin] -= removed;
+ }
+ }
+
+ update_offsets(table);
+
+ return 0;
+}
+
+static int connman_iptables_compare_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
+ char *target_name, struct xtables_target *xt_t,
+ struct xtables_match *xt_m,
+ struct xtables_rule_match *xt_rm)
+{
+ struct connman_iptables_entry *entry;
+ GList *found;
+
+ found = find_existing_rule(table, ip, chain_name, target_name,
+ xt_t, xt_m, xt_rm);
+ if (found == NULL)
+ return -EINVAL;
+
+ entry = found->data;
+ if (entry == NULL)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+static int connman_iptables_change_policy(struct connman_iptables *table,
+ char *chain_name, char *policy)
+{
+ GList *chain_head;
+ struct connman_iptables_entry *entry;
+ struct xt_entry_target *target;
+ struct xt_standard_target *t;
+ int verdict;
+
+ verdict = target_to_verdict(policy);
+ if (verdict == 0)
+ return -EINVAL;
+
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return -EINVAL;
+
+ entry = chain_head->data;
+ if (entry->builtin < 0)
+ return -EINVAL;
+
+ target = ipt_get_target(entry->entry);
+
+ t = (struct xt_standard_target *)target;
+ t->verdict = verdict;
+
+ return 0;
+}
+
+static struct ipt_replace *connman_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->old_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->hook_entry, sizeof(table->hook_entry));
+ memcpy(r->underflow, table->underflow, sizeof(table->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:
+ printf("\ttarget RETURN\n");
+ break;
+
+ case -NF_ACCEPT - 1:
+ printf("\ttarget ACCEPT\n");
+ break;
+
+ case -NF_DROP - 1:
+ printf("\ttarget DROP\n");
+ break;
+
+ case -NF_QUEUE - 1:
+ printf("\ttarget QUEUE\n");
+ break;
+
+ case -NF_STOP - 1:
+ printf("\ttarget STOP\n");
+ break;
+
+ default:
+ printf("\tJUMP @%p (0x%x)\n",
+ (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) {
+ printf("\ttarget %s\n", target->u.user.name);
+ return;
+ }
+
+ if(xt_t->print != NULL) {
+ printf("\ttarget ");
+ xt_t->print(NULL, target, 1);
+ printf("\n");
+ }
+ }
+}
+
+static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
{
+ struct xtables_match *xt_m;
struct xt_entry_match *match;
- struct xtables_match *xt_match;
- match = (struct xt_entry_match *)e->elems;
- if (match == NULL)
+ if (entry->elems == (unsigned char *)entry + entry->target_offset)
return;
- xt_match = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
- if (xt_match == NULL)
+ 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) {
+ printf("\tmatch ");
+ xt_m->print(NULL, match, 1);
+ printf("\n");
+
return;
+ }
+
+out:
+ printf("\tmatch %s\n", match->u.user.name);
- printf("\tMATCH:%s\n", xt_match->m->u.user.name);
}
-static void print_target(const struct ipt_entry *e)
+static int connman_iptables_dump_entry(struct ipt_entry *entry,
+ struct connman_iptables *table)
{
struct xt_entry_target *target;
- struct xtables_target *xt_target;
+ unsigned int offset;
+ int builtin;
- target = (void *)e + e->target_offset;
- if (target == NULL)
- return;
+ offset = (char *)entry - (char *)table->blob_entries->entrytable;
+ target = ipt_get_target(entry);
+ builtin = is_hook_entry(table, entry);
- xt_target = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
- if (xt_target == NULL)
- return;
+ if (entry_to_offset(table, entry) + entry->next_offset ==
+ table->blob_entries->size) {
+ printf("End of CHAIN 0x%x\n", offset);
+ return 0;
+ }
+
+ if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
+ printf("USER CHAIN (%s) %p match %p target %p size %d\n",
+ target->data, entry, entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+
+ return 0;
+ } else if (builtin >= 0) {
+ printf("CHAIN (%s) %p match %p target %p size %d\n",
+ hooknames[builtin], entry, entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+ } else {
+ printf("RULE %p match %p target %p size %d\n", entry,
+ entry->elems,
+ (char *)entry + entry->target_offset,
+ entry->next_offset);
+ }
+
+ dump_match(table, entry);
+ dump_target(table, entry);
+
+ return 0;
+}
- printf("\tTARGET: %s\n", xt_target->t->u.user.name);
+static void connman_iptables_dump_hook(struct connman_iptables *table)
+{
+ int i;
+ printf("hooks: \n");
+ for (i = 0; i < NF_INET_NUMHOOKS; i++) {
+ if ((table->info->valid_hooks & (1 << i)))
+ printf("%s entry %p underflow %p (%#x)\n",
+ hooknames[i],
+ table->blob_entries->entrytable +
+ table->info->hook_entry[i],
+ table->blob_entries->entrytable +
+ table->info->underflow[i],
+ table->info->underflow[i]);
+ }
}
+static void connman_iptables_dump(struct connman_iptables *table)
+{
+ printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
+ table->info->name,
+ table->info->valid_hooks, table->info->num_entries,
+ table->info->size);
+
+ connman_iptables_dump_hook(table);
+
+ ENTRY_ITERATE(table->blob_entries->entrytable,
+ table->blob_entries->size,
+ connman_iptables_dump_entry, table);
+
+}
-static void print_rule(const struct ipt_entry *e, const char *chain)
+static int connman_iptables_get_entries(struct connman_iptables *table)
{
- /* print chain name */
- printf("CHAIN %s:\n", chain);
+ socklen_t entry_size;
- print_match(e);
- print_target(e);
+ 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 void print_tables(struct iptc_handle *h)
+static int connman_iptables_replace(struct connman_iptables *table,
+ struct ipt_replace *r)
{
- const char *chain;
- const struct ipt_entry *rule;
+ return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
+ sizeof(*r) + r->size);
+}
- chain = iptc_first_chain(h);
+static void connman_iptables_cleanup(struct connman_iptables *table)
+{
+ GList *list;
+ struct connman_iptables_entry *entry;
- while(chain) {
- rule = iptc_first_rule(chain, h);
- while (rule) {
- print_rule(rule, chain);
+ close(table->ipt_sock);
- rule = iptc_next_rule(rule, h);
- }
+ for (list = table->entries; list; list = list->next) {
+ entry = list->data;
- chain = iptc_next_chain(h);
+ g_free(entry->entry);
}
+
+ g_free(table->info);
+ g_free(table->blob_entries);
+ g_free(table);
+
+ xtables_free_opts(1);
}
-static struct ipt_entry *build_quota_drop_entry(void)
+static int connman_iptables_commit(struct connman_iptables *table)
{
- struct ipt_entry *e;
- size_t match_size, target_size;
- struct xtables_target *t;
- struct xtables_match *m;
- struct xtables_rule_match *matches = NULL;
+ struct ipt_replace *repl;
+
+ repl = connman_iptables_blob(table);
+
+ return connman_iptables_replace(table, repl);
+}
+
+static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
+{
+ struct ipt_entry *new_entry;
+ int builtin;
- m = xtables_find_match("quota", XTF_LOAD_MUST_SUCCEED, &matches);
- if (m == NULL)
+ new_entry = g_try_malloc0(entry->next_offset);
+ if (new_entry == NULL)
+ return -ENOMEM;
+
+ memcpy(new_entry, entry, entry->next_offset);
+
+ builtin = is_hook_entry(table, entry);
+
+ return connman_add_entry(table, new_entry, NULL, builtin);
+}
+
+static struct connman_iptables *connman_iptables_init(const char *table_name)
+{
+ struct connman_iptables *table = NULL;
+ char *module = NULL;
+ socklen_t s;
+
+ if (xtables_insmod("ip_tables", NULL, TRUE) != 0)
+ goto err;
+
+ module = g_strconcat("iptable_", table_name, NULL);
+ if (module == NULL)
+ goto err;
+
+ if (xtables_insmod(module, NULL, TRUE) != 0)
+ goto err;
+
+ g_free(module);
+ module = NULL;
+
+ table = g_try_new0(struct connman_iptables, 1);
+ if (table == NULL)
return NULL;
- match_size = IPT_ALIGN(sizeof(struct ipt_entry_match)) + m->size;
+ table->info = g_try_new0(struct ipt_getinfo, 1);
+ if (table->info == NULL)
+ goto err;
+
+ table->ipt_sock = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, 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 (connman_iptables_get_entries(table) < 0)
+ goto err;
+
+ table->num_entries = 0;
+ table->old_entries = table->info->num_entries;
+ table->size = 0;
+
+ memcpy(table->underflow, table->info->underflow,
+ sizeof(table->info->underflow));
+ memcpy(table->hook_entry, table->info->hook_entry,
+ sizeof(table->info->hook_entry));
+
+ ENTRY_ITERATE(table->blob_entries->entrytable,
+ table->blob_entries->size,
+ add_entry, table);
+
+ return table;
+
+err:
+ g_free(module);
+
+ connman_iptables_cleanup(table);
+
+ return NULL;
+}
+
+static struct option connman_iptables_opts[] = {
+ {.name = "append", .has_arg = 1, .val = 'A'},
+ {.name = "compare", .has_arg = 1, .val = 'C'},
+ {.name = "delete", .has_arg = 1, .val = 'D'},
+ {.name = "flush-chain", .has_arg = 1, .val = 'F'},
+ {.name = "insert", .has_arg = 1, .val = 'I'},
+ {.name = "list", .has_arg = 2, .val = 'L'},
+ {.name = "new-chain", .has_arg = 1, .val = 'N'},
+ {.name = "policy", .has_arg = 1, .val = 'P'},
+ {.name = "delete-chain", .has_arg = 1, .val = 'X'},
+ {.name = "destination", .has_arg = 1, .val = 'd'},
+ {.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 = "source", .has_arg = 1, .val = 's'},
+ {.name = "table", .has_arg = 1, .val = 't'},
+ {NULL},
+};
+
+struct xtables_globals connman_iptables_globals = {
+ .option_offset = 0,
+ .opts = connman_iptables_opts,
+ .orig_opts = connman_iptables_opts,
+};
+
+static struct xtables_target *prepare_target(struct connman_iptables *table,
+ char *target_name)
+{
+ struct xtables_target *xt_t = NULL;
+ gboolean is_builtin, is_user_defined;
+ GList *chain_head = NULL;
+ size_t target_size;
+
+ is_builtin = FALSE;
+ is_user_defined = FALSE;
+
+ if (is_builtin_target(target_name))
+ is_builtin = TRUE;
+ else {
+ chain_head = find_chain_head(table, target_name);
+ if (chain_head != NULL && chain_head->next != NULL)
+ is_user_defined = TRUE;
+ }
+
+ if (is_builtin || is_user_defined)
+ xt_t = xtables_find_target(IPT_STANDARD_TARGET,
+ XTF_LOAD_MUST_SUCCEED);
+ else
+ xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
- m->m = xtables_calloc(1, match_size);
- if (m->m == NULL)
+ if (xt_t == NULL)
return NULL;
- m->m->u.match_size = match_size;
- strcpy(m->m->u.user.name, m->name);
- xtables_set_revision(m->m->u.user.name, m->revision);
- if (m->init != NULL)
- m->init(m->m);
- t = xtables_find_target("DROP", XTF_TRY_LOAD);
- if (t == NULL) {
- free(m->m);
+ target_size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
+
+ xt_t->t = g_try_malloc0(target_size);
+ if (xt_t->t == NULL)
return NULL;
- }
- target_size = IPT_ALIGN(sizeof(struct ipt_entry_target)) + t->size;
+ xt_t->t->u.target_size = target_size;
+
+ if (is_builtin || is_user_defined) {
+ struct xt_standard_target *target;
+
+ target = (struct xt_standard_target *)(xt_t->t);
+ strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
- t->t = xtables_calloc(1, target_size);
- t->t->u.target_size = target_size;
- strcpy(t->t->u.user.name, "DROP");
- xtables_set_revision(t->t->u.user.name, t->revision);
- if (t->init != NULL)
- t->init(t->t);
+ if (is_builtin == TRUE)
+ target->verdict = target_to_verdict(target_name);
+ else if (is_user_defined == TRUE) {
+ struct connman_iptables_entry *target_rule;
- e = calloc(1, sizeof(struct ipt_entry) + match_size + target_size);
- if (e == NULL) {
- free(m->m);
- free(t->t);
+ if (chain_head == NULL) {
+ g_free(xt_t->t);
+ return NULL;
+ }
+
+ target_rule = chain_head->next->data;
+ target->verdict = target_rule->offset;
+ }
+ } else {
+ 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);
}
- e->target_offset = sizeof(struct ipt_entry) + match_size;
- e->next_offset = sizeof(struct ipt_entry) + match_size + target_size;
+#if XTABLES_VERSION_CODE > 5
+ if (xt_t->x6_options != NULL)
+ connman_iptables_globals.opts =
+ xtables_options_xfrm(
+ connman_iptables_globals.orig_opts,
- memcpy(e->elems, m->m, match_size);
- memcpy(e->elems + match_size, t->t, target_size);
+ connman_iptables_globals.opts,
+ xt_t->x6_options,
+ &xt_t->option_offset);
+ else
+#endif
+ connman_iptables_globals.opts =
+ xtables_merge_options(
+#if XTABLES_VERSION_CODE > 5
+ connman_iptables_globals.orig_opts,
+#endif
+ connman_iptables_globals.opts,
+ xt_t->extra_opts,
+ &xt_t->option_offset);
+
+ if (connman_iptables_globals.opts == NULL) {
+ g_free(xt_t->t);
+ xt_t = NULL;
+ }
- return e;
+ return xt_t;
}
-static int add_rule(const ipt_chainlabel chain, struct ipt_entry *e,
- struct iptc_handle *h)
+static struct xtables_match *prepare_matches(struct connman_iptables *table,
+ struct xtables_rule_match **xt_rm, char *match_name)
{
- if (!iptc_create_chain(chain, h)) {
- printf("Chain creation error (%s)\n", iptc_strerror(errno));
- return -1;
+ struct xtables_match *xt_m;
+ size_t match_size;
+
+ if (match_name == NULL)
+ return NULL;
+
+ xt_m = xtables_find_match(match_name, XTF_LOAD_MUST_SUCCEED, xt_rm);
+ match_size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
+
+ xt_m->m = g_try_malloc0(match_size);
+ if (xt_m->m == NULL)
+ return NULL;
+
+ xt_m->m->u.match_size = match_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)
+ goto done;
+
+#if XTABLES_VERSION_CODE > 5
+ if (xt_m->x6_options != NULL)
+ connman_iptables_globals.opts =
+ xtables_options_xfrm(
+ connman_iptables_globals.orig_opts,
+ connman_iptables_globals.opts,
+ xt_m->x6_options,
+ &xt_m->option_offset);
+ else
+#endif
+ connman_iptables_globals.opts =
+ xtables_merge_options(
+#if XTABLES_VERSION_CODE > 5
+ connman_iptables_globals.orig_opts,
+#endif
+ connman_iptables_globals.opts,
+ xt_m->extra_opts,
+ &xt_m->option_offset);
+
+ if (connman_iptables_globals.opts == NULL) {
+ g_free(xt_m->m);
+ xt_m = NULL;
}
- if (!iptc_insert_entry(chain, e, 0, h)) {
- printf("Entry insertion error (%s)\n", iptc_strerror(errno));
+done:
+ return xt_m;
+}
+
+static int parse_ip_and_mask(const char *str, struct in_addr *ip, struct in_addr *mask)
+{
+ char **tokens;
+ uint32_t prefixlength;
+ uint32_t tmp;
+ int err;
+
+ tokens = g_strsplit(str, "/", 2);
+ if (tokens == NULL)
return -1;
+
+ if (!inet_pton(AF_INET, tokens[0], ip)) {
+ err = -1;
+ goto out;
}
- if (!iptc_commit(h)) {
- printf("Commit error (%s)\n", iptc_strerror(errno));
- return -1;
+ if (tokens[1] != NULL) {
+ prefixlength = strtol(tokens[1], NULL, 10);
+ if (prefixlength > 31) {
+ err = -1;
+ goto out;
+ }
+
+ tmp = ~(0xffffffff >> prefixlength);
+ } else {
+ tmp = 0xffffffff;
}
- return 0;
-}
+ mask->s_addr = htonl(tmp);
+ ip->s_addr = ip->s_addr & mask->s_addr;
+ err = 0;
+out:
+ g_strfreev(tokens);
-static void remove_rule(const ipt_chainlabel chain, struct iptc_handle *h)
-{
- iptc_flush_entries(chain, h);
- iptc_delete_chain(chain, h);
- iptc_commit(h);
+ return err;
}
-
int main(int argc, char *argv[])
{
- struct iptc_handle *h;
- struct ipt_entry *e;
+ struct connman_iptables *table;
+ struct xtables_rule_match *xt_rm, *tmp_xt_rm;
+ struct xtables_match *xt_m, *xt_m_t;
+ struct xtables_target *xt_t;
+ struct ipt_ip ip;
+ char *table_name, *chain, *new_chain, *match_name, *target_name;
+ char *delete_chain, *flush_chain, *policy;
+ int c, in_len, out_len;
+ gboolean dump, invert, delete, insert, delete_rule, compare_rule;
- if (argc < 2) {
- printf("Usage: iptables-test [chain-name]\n");
- return -1;
+ xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
+
+ dump = FALSE;
+ invert = FALSE;
+ delete = FALSE;
+ insert = FALSE;
+ delete_rule = FALSE;
+ compare_rule = FALSE;
+ chain = new_chain = match_name = target_name = NULL;
+ delete_chain = flush_chain = policy = NULL;
+ memset(&ip, 0, sizeof(struct ipt_ip));
+ table = NULL;
+ xt_rm = NULL;
+ xt_m = NULL;
+ xt_t = NULL;
+
+ /* extension's options will generate false-positives errors */
+ opterr = 0;
+
+ while ((c = getopt_long(argc, argv,
+ "-A:C:D:F:I:L::N:P:X:d:i:j:m:o:s:t:",
+ connman_iptables_globals.opts, NULL)) != -1) {
+ switch (c) {
+ case 'A':
+ /* It is either -A, -C, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ break;
+
+ case 'C':
+ /* It is either -A, -C, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ compare_rule = TRUE;
+ break;
+
+ case 'D':
+ /* It is either -A, -C, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ delete_rule = TRUE;
+ break;
+
+ case 'F':
+ flush_chain = optarg;
+ break;
+
+ case 'I':
+ /* It is either -A, -C, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ insert = TRUE;
+ break;
+
+ case 'L':
+ dump = true;
+ break;
+
+ case 'N':
+ new_chain = optarg;
+ break;
+
+ case 'P':
+ chain = optarg;
+ if (optind < argc)
+ policy = argv[optind++];
+ else
+ goto out;
+
+ break;
+
+ case 'X':
+ delete = true;
+ delete_chain = optarg;
+ break;
+
+ case 'd':
+ if (!parse_ip_and_mask(optarg, &ip.dst, &ip.dmsk))
+ break;
+
+ if (invert)
+ ip.invflags |= IPT_INV_DSTIP;
+
+
+ break;
+
+ case 'i':
+ in_len = strlen(optarg);
+
+ if (in_len + 1 > IFNAMSIZ)
+ break;
+
+ strcpy(ip.iniface, optarg);
+ memset(ip.iniface_mask, 0xff, in_len + 1);
+
+ if (invert)
+ ip.invflags |= IPT_INV_VIA_IN;
+
+ break;
+
+ case 'j':
+ target_name = optarg;
+ xt_t = prepare_target(table, target_name);
+ if (xt_t == NULL)
+ goto out;
+
+ break;
+
+ case 'm':
+ match_name = optarg;
+ xt_m = prepare_matches(table, &xt_rm, match_name);
+ if (xt_m == NULL)
+ goto out;
+
+ break;
+
+ case 'o':
+ out_len = strlen(optarg);
+
+ if (out_len + 1 > IFNAMSIZ)
+ break;
+
+ strcpy(ip.outiface, optarg);
+ memset(ip.outiface_mask, 0xff, out_len + 1);
+
+ if (invert)
+ ip.invflags |= IPT_INV_VIA_OUT;
+
+ break;
+
+ case 's':
+ if (!parse_ip_and_mask(optarg, &ip.src, &ip.smsk))
+ break;
+
+ if (invert)
+ ip.invflags |= IPT_INV_SRCIP;
+
+ break;
+
+ case 't':
+ table_name = optarg;
+
+ table = connman_iptables_init(table_name);
+ if (table == NULL)
+ return -1;
+
+ break;
+
+ case 1:
+ if (optarg[0] == '!' && optarg[1] == '\0') {
+ if (invert)
+ printf("Consecutive ! not allowed\n");
+
+ invert = TRUE;
+ optarg[0] = '\0';
+ continue;
+ }
+
+ printf("Invalid option\n");
+
+ return -1;
+
+ default:
+#if XTABLES_VERSION_CODE > 5
+ if (xt_t != NULL && (xt_t->x6_parse != NULL ||
+ xt_t->parse != NULL) &&
+ (c >= (int) xt_t->option_offset &&
+ c < (int) xt_t->option_offset +
+ XT_OPTION_OFFSET_SCALE)) {
+ xtables_option_tpcall(c, argv,
+ invert, xt_t, NULL);
+
+ break;
+ }
+
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
+ tmp_xt_rm = tmp_xt_rm->next) {
+ xt_m_t = tmp_xt_rm->match;
+
+ if (tmp_xt_rm->completed ||
+ (xt_m_t->x6_parse == NULL &&
+ xt_m_t->parse == NULL))
+ continue;
+
+ if (c < (int) xt_m_t->option_offset ||
+ c >= (int) xt_m_t->option_offset
+ + XT_OPTION_OFFSET_SCALE)
+ continue;
+
+ xtables_option_mpcall(c, argv,
+ invert, xt_m_t, NULL);
+
+ break;
+ }
+#else
+ 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)) {
+
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
+ tmp_xt_rm = tmp_xt_rm->next) {
+ xt_m_t = tmp_xt_rm->match;
+
+ if (tmp_xt_rm->completed ||
+ xt_m_t->parse == NULL)
+ continue;
+
+ if (xt_m->parse(c - xt_m->option_offset,
+ argv, invert, &xt_m->mflags,
+ NULL, &xt_m->m))
+ break;
+ }
+ }
+#endif
+ break;
+ }
+
+ invert = FALSE;
}
- h = iptc_init("filter");
- if (!h) {
- printf("libiptc initialization error (%s)\n",
- iptc_strerror(errno));
- exit(errno);
+#if XTABLES_VERSION_CODE > 5
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
+ tmp_xt_rm = tmp_xt_rm->next)
+ xtables_option_mfcall(tmp_xt_rm->match);
+
+ if (xt_t != NULL)
+ xtables_option_tfcall(xt_t);
+#else
+ for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
+ tmp_xt_rm = tmp_xt_rm->next)
+ if (tmp_xt_rm->match->final_check != NULL)
+ tmp_xt_rm->match->final_check(
+ tmp_xt_rm->match->mflags);
+
+ if (xt_t != NULL && xt_t->final_check != NULL)
+ xt_t->final_check(xt_t->tflags);
+#endif
+
+ if (table == NULL) {
+ table_name = "filter";
+
+ table = connman_iptables_init(table_name);
+ if (table == NULL)
+ return -1;
}
- xtables_init();
- xtables_set_nfproto(NFPROTO_IPV4);
+ if (delete) {
+ if (delete_chain == NULL)
+ goto out;
- e = build_quota_drop_entry();
- if (e == NULL)
+ printf("Delete chain %s\n", delete_chain);
+
+ connman_iptables_delete_chain(table, delete_chain);
+
+ goto commit;
+ }
+
+ if (flush_chain) {
+ printf("Flush chain %s\n", flush_chain);
+
+ connman_iptables_flush_chain(table, flush_chain);
+
+ goto commit;
+ }
+
+ if (dump) {
+ connman_iptables_dump(table);
+
+ return 0;
+ }
+
+ if (chain && new_chain)
return -1;
- add_rule(argv[1], e, h);
+ if (new_chain) {
+ printf("New chain %s\n", new_chain);
+
+ connman_iptables_add_chain(table, new_chain);
+
+ goto commit;
+ }
+
+ if (chain) {
+ if (policy != NULL) {
+ printf("Changing policy of %s to %s\n", chain, policy);
+
+ connman_iptables_change_policy(table, chain, policy);
+
+ goto commit;
+ }
+
+ if (compare_rule == TRUE) {
+ int ret;
+
+ ret = connman_iptables_compare_rule(table, &ip,
+ chain, target_name, xt_t, xt_m, xt_rm);
+
+ if (ret == 0)
+ printf("Rule exists.\n");
+ else
+ printf("Rule does not exist.\n");
+
+ goto out;
+ }
+
+ if (delete_rule == TRUE) {
+ printf("Deleting %s to %s (match %s)\n", target_name,
+ chain, match_name);
+
+ connman_iptables_delete_rule(table, &ip, chain,
+ target_name, xt_t, xt_m, xt_rm);
+
+ goto commit;
+ }
+
+ if (insert == TRUE) {
+ printf("Inserting %s to %s (match %s)\n", target_name,
+ chain, match_name);
+
+ connman_iptables_insert_rule(table, &ip, chain,
+ target_name, xt_t, xt_rm);
+ } else {
+ printf("Appending %s to %s (match %s)\n", target_name,
+ chain, match_name);
+
+ connman_iptables_append_rule(table, &ip, chain,
+ target_name, xt_t, xt_rm);
+ }
+ }
+
+commit:
+
+ connman_iptables_commit(table);
+
+out:
+ connman_iptables_cleanup(table);
- print_tables(h);
+ if (xt_t)
+ g_free(xt_t->t);
- remove_rule(argv[1], h);
+ if (xt_m)
+ g_free(xt_m->m);
return 0;
}
projects / framework / connectivity / connman.git / blobdiff