*
* 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
#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...) \
({ \
type *__entry; \
\
for (__i = 0, __n = 0; __i < (size); \
- __i += __entry->next_offset, __n++) { \
+ __i += __entry->next_offset, __n++) { \
__entry = (void *)(entries) + __i; \
if (__n < n) \
continue; \
#define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
-struct ipt_error_target {
+struct error_target {
struct xt_entry_target t;
char error[IPT_TABLE_MAXNAMELEN];
};
struct connman_iptables_entry {
- int jump_offset;
+ int offset;
+ int builtin;
struct ipt_entry *entry;
};
unsigned int old_entries;
unsigned int size;
+ unsigned int underflow[NF_INET_NUMHOOKS];
+ unsigned int hook_entry[NF_INET_NUMHOOKS];
+
GList *entries;
};
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)
{
- int builtin;
struct ipt_entry *entry;
struct xt_entry_target *target;
entry = e->entry;
- builtin = is_hook_entry(table, entry);
- if (builtin >= 0)
+ if (e->builtin >= 0)
return TRUE;
target = ipt_get_target(entry);
return FALSE;
}
-static GList *find_chain_tail(struct connman_iptables *table,
+static GList *find_chain_head(struct connman_iptables *table,
char *chain_name)
{
- GList *chain_head, *list;
- struct connman_iptables_entry *head, *tail;
+ GList *list;
+ struct connman_iptables_entry *head;
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);
+ builtin = head->builtin;
if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
break;
break;
}
- if (list == NULL)
- return NULL;
+ return list;
+}
- chain_head = list;
+static GList *find_chain_tail(struct connman_iptables *table,
+ char *chain_name)
+{
+ struct connman_iptables_entry *tail;
+ GList *chain_head, *list;
+
+ 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;
- entry = tail->entry;
if (is_chain(table, tail))
return list;
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 iptables_add_entry(struct connman_iptables *table,
- struct ipt_entry *entry, GList *before)
+ struct ipt_entry *entry, GList *before,
+ int builtin)
{
- struct connman_iptables_entry *e;
+ struct connman_iptables_entry *e, *entry_before;
if (table == NULL)
return -1;
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 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;
}
GList *last;
struct ipt_entry *entry_head;
struct ipt_entry *entry_return;
- struct ipt_error_target *error;
+ struct error_target *error;
struct ipt_standard_target *standard;
u_int16_t entry_head_size, entry_return_size;
/* head entry */
entry_head_size = sizeof(struct ipt_entry) +
- sizeof(struct ipt_error_target);
+ sizeof(struct error_target);
entry_head = g_try_malloc0(entry_head_size);
if (entry_head == NULL)
- goto err;
+ 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 ipt_error_target *) entry_head->elems;
+ 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 ipt_error_target));
+ error->t.u.user.target_size = ALIGN(sizeof(struct error_target));
strcpy(error->error, name);
- if (iptables_add_entry(table, entry_head, last) < 0)
- goto err;
+ if (iptables_add_entry(table, entry_head, last, -1) < 0)
+ goto err_head;
/* tail entry */
entry_return_size = sizeof(struct ipt_entry) +
ALIGN(sizeof(struct ipt_standard_target));
standard->verdict = XT_RETURN;
- if (iptables_add_entry(table, entry_return, last) < 0)
+ if (iptables_add_entry(table, entry_return, last, -1) < 0)
goto err;
return 0;
err:
- g_free(entry_head);
g_free(entry_return);
+err_head:
+ g_free(entry_head);
return -ENOMEM;
}
-static struct ipt_entry *
-new_rule(char *target_name, struct xtables_target *xt_t,
- char *match_name, struct xtables_match *xt_m)
+static int iptables_delete_chain(struct connman_iptables *table, char *name)
{
+ struct connman_iptables_entry *entry;
+ GList *chain_head, *chain_tail;
+
+ 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 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;
- int is_builtin = is_builtin_target(target_name);
- if (xt_m)
- match_size = xt_m->m->u.match_size;
- else
- match_size = 0;
+ 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 = 0;
+ 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;
- if (xt_m) {
- struct xt_entry_match *entry_match;
- entry_match = (struct xt_entry_match *)new_entry->elems;
- memcpy(entry_match, xt_m->m, 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 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;
+
+ DBG("");
+
+ 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 = iptables_add_entry(table, new_entry, chain_tail->prev, builtin);
+ if (ret < 0)
+ g_free(new_entry);
+
+ return ret;
+}
+
+static int 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)
+{
+ struct ipt_entry *new_entry;
+ int builtin = -1, ret;
+ GList *chain_head;
+
+ 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 = iptables_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 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;
- if (xt_t) {
- struct xt_entry_target *entry_target;
+ builtin = entry->builtin;
- if (is_builtin) {
- struct xt_standard_target *target;
+ /* 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);
- target = (struct xt_standard_target *)(xt_t->t);
- strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
- target->verdict = target_to_verdict(target_name);
+ removed += remove_table_entry(table, entry);
+
+ if (builtin >= 0) {
+ list = list->next;
+ if (list) {
+ entry = list->data;
+ entry->builtin = builtin;
}
- entry_target = ipt_get_target(new_entry);
- memcpy(entry_target, xt_t->t, target_size);
+ 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;
+ }
}
- return new_entry;
+ update_offsets(table);
+
+ return 0;
}
-static int
-iptables_add_rule(struct connman_iptables *table, char *chain_name,
+static int iptables_compare_rule(struct connman_iptables *table,
+ struct ipt_ip *ip, char *chain_name,
char *target_name, struct xtables_target *xt_t,
- char *match_name, struct xtables_match *xt_m)
+ struct xtables_match *xt_m,
+ struct xtables_rule_match *xt_rm)
{
- GList *chain_tail;
- struct ipt_entry *new_entry;
+ struct connman_iptables_entry *entry;
+ GList *found;
- chain_tail = find_chain_tail(table, chain_name);
- if (chain_tail == NULL)
+ found = find_existing_rule(table, ip, chain_name, target_name,
+ xt_t, xt_m, xt_rm);
+ if (found == NULL)
return -EINVAL;
- new_entry = new_rule(target_name, xt_t,
- match_name, xt_m);
- if (new_entry == NULL)
+ entry = found->data;
+ if (entry == NULL)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+static int 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;
- return iptables_add_entry(table, new_entry, chain_tail->prev);
+ target = ipt_get_target(entry->entry);
+
+ t = (struct xt_standard_target *)target;
+ t->verdict = verdict;
+
+ return 0;
}
-static struct ipt_replace *
-iptables_blob(struct connman_iptables *table)
+static struct ipt_replace *iptables_blob(struct connman_iptables *table)
{
struct ipt_replace *r;
GList *list;
memset(r, 0, sizeof(*r) + table->size);
r->counters = g_try_malloc0(sizeof(struct xt_counters)
- * table->num_entries);
+ * table->old_entries);
if (r->counters == NULL) {
g_free(r);
return NULL;
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));
+ 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) {
return r;
}
+static void dump_ip(struct ipt_entry *entry)
+{
+ struct ipt_ip *ip = &entry->ip;
+ char ip_string[INET6_ADDRSTRLEN];
+ char ip_mask[INET6_ADDRSTRLEN];
+
+ if (strlen(ip->iniface))
+ connman_info("\tin %s", ip->iniface);
+
+ if (strlen(ip->outiface))
+ connman_info("\tout %s", ip->outiface);
+
+ if (inet_ntop(AF_INET, &ip->src, ip_string, INET6_ADDRSTRLEN) != NULL &&
+ inet_ntop(AF_INET, &ip->smsk,
+ ip_mask, INET6_ADDRSTRLEN) != NULL)
+ connman_info("\tsrc %s/%s", ip_string, ip_mask);
+
+ if (inet_ntop(AF_INET, &ip->dst, ip_string, INET6_ADDRSTRLEN) != NULL &&
+ inet_ntop(AF_INET, &ip->dmsk,
+ ip_mask, INET6_ADDRSTRLEN) != NULL)
+ connman_info("\tdst %s/%s", ip_string, ip_mask);
+}
+
static void dump_target(struct connman_iptables *table,
struct ipt_entry *entry)
dump_match(table, entry);
dump_target(table, entry);
+ dump_ip(entry);
return 0;
}
static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
{
struct ipt_entry *new_entry;
+ int builtin;
new_entry = g_try_malloc0(entry->next_offset);
if (new_entry == NULL)
memcpy(new_entry, entry, entry->next_offset);
- return iptables_add_entry(table, new_entry, NULL);
+ builtin = is_hook_entry(table, entry);
+
+ return iptables_add_entry(table, new_entry, NULL, builtin);
}
static void table_cleanup(struct connman_iptables *table)
GList *list;
struct connman_iptables_entry *entry;
+ if (table == NULL)
+ return;
+
close(table->ipt_sock);
for (list = table->entries; list; list = list->next) {
entry = list->data;
g_free(entry->entry);
+ g_free(entry);
}
g_list_free(table->entries);
static struct connman_iptables *iptables_init(char *table_name)
{
- struct connman_iptables *table;
+ struct connman_iptables *table = NULL;
+ char *module = NULL;
socklen_t s;
+ DBG("%s", table_name);
+
+ if (xtables_insmod("ip_tables", NULL, TRUE) != 0)
+ return NULL;
+
+ module = g_strconcat("iptable_", table_name, NULL);
+ if (module == NULL)
+ return NULL;
+
+ if (xtables_insmod(module, NULL, TRUE) != 0) {
+ g_free(module);
+ return NULL;
+ }
+
+ g_free(module);
+
table = g_hash_table_lookup(table_hash, table_name);
if (table != NULL)
return table;
if (table->info == NULL)
goto err;
- table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
+ table->ipt_sock = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
if (table->ipt_sock < 0)
goto err;
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);
- g_hash_table_insert(table_hash, table_name, table);
+ g_hash_table_insert(table_hash, g_strdup(table_name), table);
return table;
err:
-
table_cleanup(table);
return NULL;
static struct option 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},
};
.orig_opts = 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);
+
+ if (xt_t == NULL)
+ return NULL;
+
+ 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;
+
+ 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);
+
+ if (is_builtin == TRUE)
+ target->verdict = target_to_verdict(target_name);
+ else if (is_user_defined == TRUE) {
+ struct connman_iptables_entry *target_rule;
+
+ 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);
+ }
+
+#if XTABLES_VERSION_CODE > 5
+ if (xt_t->x6_options != NULL)
+ iptables_globals.opts =
+ xtables_options_xfrm(
+ iptables_globals.orig_opts,
+ iptables_globals.opts,
+ xt_t->x6_options,
+ &xt_t->option_offset);
+ else
+#endif
+ iptables_globals.opts =
+ xtables_merge_options(
+#if XTABLES_VERSION_CODE > 5
+ iptables_globals.orig_opts,
+#endif
+ iptables_globals.opts,
+ xt_t->extra_opts,
+ &xt_t->option_offset);
+
+ if (iptables_globals.opts == NULL) {
+ g_free(xt_t->t);
+ xt_t = NULL;
+ }
+
+ return xt_t;
+}
+
+static struct xtables_match *prepare_matches(struct connman_iptables *table,
+ struct xtables_rule_match **xt_rm, char *match_name)
+{
+ 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)
+ iptables_globals.opts =
+ xtables_options_xfrm(
+ iptables_globals.orig_opts,
+ iptables_globals.opts,
+ xt_m->x6_options,
+ &xt_m->option_offset);
+ else
+#endif
+ iptables_globals.opts =
+ xtables_merge_options(
+#if XTABLES_VERSION_CODE > 5
+ iptables_globals.orig_opts,
+#endif
+ iptables_globals.opts,
+ xt_m->extra_opts,
+ &xt_m->option_offset);
+
+ if (iptables_globals.opts == NULL) {
+ g_free(xt_m->m);
+ xt_m = NULL;
+ }
+
+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 (tokens[1] != NULL) {
+ prefixlength = strtol(tokens[1], NULL, 10);
+ if (prefixlength > 31) {
+ err = -1;
+ goto out;
+ }
+
+ tmp = ~(0xffffffff >> prefixlength);
+ } else {
+ tmp = 0xffffffff;
+ }
+
+ mask->s_addr = htonl(tmp);
+ ip->s_addr = ip->s_addr & mask->s_addr;
+ err = 0;
+out:
+ g_strfreev(tokens);
+
+ return err;
+}
+
static int iptables_command(int argc, char *argv[])
{
struct connman_iptables *table;
- struct xtables_match *xt_m;
+ 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;
- int c, ret;
- size_t size;
- gboolean dump, invert;
+ char *flush_chain, *delete_chain, *policy;
+ int c, ret, in_len, out_len;
+ gboolean dump, invert, insert, delete, compare;
if (argc == 0)
return -EINVAL;
dump = FALSE;
invert = FALSE;
- table_name = chain = new_chain = match_name = target_name = NULL;
+ insert = FALSE;
+ delete = FALSE;
+ compare = FALSE;
+ chain = new_chain = match_name = target_name = NULL;
+ flush_chain = delete_chain = policy = NULL;
+ memset(&ip, 0, sizeof(struct ipt_ip));
table = NULL;
+ xt_rm = NULL;
xt_m = NULL;
xt_t = NULL;
ret = 0;
+ /* extension's options will generate false-positives errors */
+ opterr = 0;
+
optind = 0;
while ((c = getopt_long(argc, argv,
- "-A:L::N:j:i:m:o:t:", iptables_globals.opts, NULL)) != -1) {
+ "-A:C:D:F:I:L::N:P:X:d:j:i:m:o:s:t:",
+ 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 = TRUE;
+ break;
+
+ case 'D':
+ /* It is either -A, -C, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ delete = 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':
new_chain = optarg;
break;
- case 'j':
- target_name = optarg;
- xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
+ case 'P':
+ chain = optarg;
+ if (optind < argc)
+ policy = argv[optind++];
+ else
+ goto out;
- if (xt_t == NULL)
- break;
+ break;
- size = ALIGN(sizeof(struct ipt_entry_target)) +
- xt_t->size;
+ case 'X':
+ delete_chain = optarg;
+ break;
- 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;
+ 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 = 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);
+ xt_m = prepare_matches(table, &xt_rm, match_name);
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':
+ 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 = iptables_init(table_name);
+ if (table == NULL) {
+ ret = -EINVAL;
+ goto out;
+ }
+
break;
case 1:
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;
+#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);
- xt_m->parse(c - xt_m->option_offset, argv,
- invert, &xt_m->mflags, NULL, &xt_m->m);
+ 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;
}
- if (table_name == NULL)
- table_name = "filter";
+#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
- table = iptables_init(table_name);
if (table == NULL) {
- ret = -EINVAL;
+ table_name = "filter";
+
+ table = iptables_init(table_name);
+ if (table == NULL) {
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ if (delete_chain != NULL) {
+ printf("Delete chain %s\n", delete_chain);
+
+ iptables_delete_chain(table, delete_chain);
+
goto out;
}
goto out;
}
+ if (flush_chain) {
+ DBG("Flush chain %s", flush_chain);
+
+ iptables_flush_chain(table, flush_chain);
+
+ goto out;
+ }
+
if (chain && new_chain) {
ret = -EINVAL;
goto out;
}
if (chain) {
- if (target_name == NULL)
- return -1;
+ if (policy != NULL) {
+ printf("Changing policy of %s to %s\n", chain, policy);
- DBG("Adding %s to %s (match %s)",
- target_name, chain, match_name);
+ iptables_change_policy(table, chain, policy);
- ret = iptables_add_rule(table, chain, target_name, xt_t,
- match_name, xt_m);
+ goto out;
+ }
- goto out;
+ if (xt_t == NULL)
+ goto out;
+
+ if (compare == TRUE) {
+ ret = iptables_compare_rule(table, &ip, chain,
+ target_name, xt_t, xt_m, xt_rm);
+ goto out;
+ }
+
+ if (delete == TRUE) {
+ DBG("Deleting %s to %s (match %s)\n",
+ target_name, chain, match_name);
+
+ ret = iptables_delete_rule(table, &ip, chain,
+ target_name, xt_t, xt_m, xt_rm);
+
+ goto out;
+ }
+
+ if (insert == TRUE) {
+ DBG("Inserting %s to %s (match %s)",
+ target_name, chain, match_name);
+
+ ret = iptables_insert_rule(table, &ip, chain,
+ target_name, xt_t, xt_rm);
+
+ goto out;
+ } else {
+ DBG("Adding %s to %s (match %s)",
+ target_name, chain, match_name);
+
+ ret = iptables_append_rule(table, &ip, chain,
+ target_name, xt_t, xt_rm);
+
+ goto out;
+ }
}
out:
arguments = g_strsplit_set(command, " ", -1);
for (argc = 0; arguments[argc]; argc++);
+ ++argc;
- DBG("command %s argc %d", command, ++argc);
+ DBG("command %s argc %d", command, argc);
argv = g_try_malloc0(argc * sizeof(char *));
if (argv == NULL) {
{
struct connman_iptables *table;
struct ipt_replace *repl;
+ int err;
+
+ DBG("%s", table_name);
table = g_hash_table_lookup(table_hash, table_name);
if (table == NULL)
repl = iptables_blob(table);
- return iptables_replace(table, repl);
+ err = iptables_replace(table, repl);
+
+ g_free(repl->counters);
+ g_free(repl);
+
+ if (err < 0)
+ return err;
+
+ g_hash_table_remove(table_hash, table_name);
+
+ return 0;
}
static void remove_table(gpointer user_data)
DBG("");
table_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
- NULL, remove_table);
+ g_free, remove_table);
xtables_init_all(&iptables_globals, NFPROTO_IPV4);
void __connman_iptables_cleanup(void)
{
+ DBG("");
+
g_hash_table_destroy(table_hash);
xtables_free_opts(1);
projects / framework / connectivity / connman.git / blobdiff