static GList *find_chain_tail(struct connman_iptables *table,
char *chain_name)
{
+ struct connman_iptables_entry *tail;
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 = 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;
- }
-
- if (list == NULL)
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == 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;
entry_before = before->data;
/*
- * We've just insterted a new entry. All references before it
+ * We've just appended/insterted a new entry. All references
* should be bumped accordingly.
*/
- for (list = table->entries; list != before; list = list->next) {
+ for (list = table->entries; list; list = list->next) {
tmp = list->data;
if (!is_jump(tmp))
t = (struct xt_standard_target *)ipt_get_target(tmp->entry);
- if (t->verdict >= entry_before->offset)
+ if (t->verdict > entry_before->offset)
t->verdict += entry->next_offset;
}
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)
{
entry = list->data;
next = g_list_next(list);
- 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, list->data);
+ removed += remove_table_entry(table, entry);
list = next;
}
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);
strcpy(error->error, name);
if (iptables_add_entry(table, entry_head, last, -1) < 0)
- goto err;
+ goto err_head;
/* tail entry */
entry_return_size = sizeof(struct ipt_entry) +
return 0;
err:
- g_free(entry_head);
g_free(entry_return);
+err_head:
+ g_free(entry_head);
return -ENOMEM;
}
+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 connman_iptables *table, struct ipt_ip *ip,
- char *target_name, struct xtables_target *xt_t,
+new_rule(struct ipt_ip *ip, char *target_name,
+ struct xtables_target *xt_t,
char *match_name, struct xtables_match *xt_m)
{
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;
if (xt_t) {
struct xt_entry_target *entry_target;
- if (is_builtin) {
- struct xt_standard_target *target;
-
- target = (struct xt_standard_target *)(xt_t->t);
- strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
- target->verdict = target_to_verdict(target_name);
- }
-
entry_target = ipt_get_target(new_entry);
memcpy(entry_target, xt_t->t, target_size);
- } else {
- struct connman_iptables_entry *target_rule;
- struct xt_standard_target *target;
- GList *chain_head;
-
- /*
- * This is a user defined target, i.e. a chain jump.
- * We search for the chain head, and the target verdict
- * is the first rule's offset on this chain.
- * The offset is from the beginning of the table.
- */
-
- chain_head = find_chain_head(table, target_name);
- if (chain_head == NULL || chain_head->next == NULL) {
- g_free(new_entry);
- return NULL;
- }
-
- target_rule = chain_head->next->data;
-
- target = (struct xt_standard_target *)ipt_get_target(new_entry);
- strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
- target->target.u.user.target_size = target_size;
- target->verdict = target_rule->offset;
}
return new_entry;
}
}
-static int
-iptables_add_rule(struct connman_iptables *table,
+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,
- char *match_name, struct xtables_match *xt_m)
+ char *match_name, struct xtables_match *xt_m,
+ int *builtin)
{
GList *chain_tail, *chain_head;
struct ipt_entry *new_entry;
struct connman_iptables_entry *head;
- int builtin = -1;
-
- DBG("");
chain_head = find_chain_head(table, chain_name);
if (chain_head == NULL)
- return -EINVAL;
+ return NULL;
chain_tail = find_chain_tail(table, chain_name);
if (chain_tail == NULL)
- return -EINVAL;
+ return NULL;
- new_entry = new_rule(table, ip,
- target_name, xt_t,
- match_name, xt_m);
+ new_entry = new_rule(ip, target_name, xt_t, match_name, xt_m);
if (new_entry == NULL)
- return -EINVAL;
+ return NULL;
update_hooks(table, chain_head, new_entry);
*/
head = chain_head->data;
if (head->builtin < 0)
- builtin = -1;
+ *builtin = -1;
else if (chain_head == chain_tail->prev) {
- builtin = head->builtin;
+ *builtin = head->builtin;
head->builtin = -1;
}
- return iptables_add_entry(table, new_entry, chain_tail->prev, builtin);
+ 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,
+ char *match_name, struct xtables_match *xt_m)
+{
+ 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, match_name, xt_m, &builtin);
+ 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,
+ char *match_name, struct xtables_match *xt_m)
+{
+ 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, match_name, xt_m, &builtin);
+ if (new_entry == NULL)
+ return -EINVAL;
+
+ ret = iptables_add_entry(table, new_entry, chain_head->next, builtin);
+ if (ret < 0)
+ g_free(new_entry);
+
+ return ret;
}
static struct ipt_replace *
entry = list->data;
g_free(entry->entry);
+ g_free(entry);
}
g_list_free(table->entries);
return NULL;
}
+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);
+ }
+
+ return xt_t;
+}
+
static struct option iptables_opts[] = {
{.name = "append", .has_arg = 1, .val = 'A'},
{.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 = "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'},
struct xtables_target *xt_t;
struct ipt_ip ip;
char *table_name, *chain, *new_chain, *match_name, *target_name;
- char *flush_chain;
+ char *flush_chain, *delete_chain;
int c, ret, in_len, out_len;
size_t size;
- gboolean dump, invert;
+ gboolean dump, invert, insert;
struct in_addr src, dst;
if (argc == 0)
dump = FALSE;
invert = FALSE;
+ insert = FALSE;
table_name = chain = new_chain = match_name = target_name = NULL;
- flush_chain = NULL;
+ flush_chain = delete_chain = NULL;
memset(&ip, 0, sizeof(struct ipt_ip));
table = NULL;
xt_m = NULL;
optind = 0;
- while ((c = getopt_long(argc, argv,
- "-A:F:L::N:d:j:i:m:o:s:t:", iptables_globals.opts, NULL)) != -1) {
+ while ((c = getopt_long(argc, argv, "-A:F:I:L::N:X:d:j:i:m:o:s:t:",
+ iptables_globals.opts, NULL)) != -1) {
switch (c) {
case 'A':
+ /* It is either -A, -D or -I at once */
+ if (chain)
+ goto out;
+
chain = optarg;
break;
flush_chain = optarg;
break;
+ case 'I':
+ /* It is either -A, -D or -I at once */
+ if (chain)
+ goto out;
+
+ chain = optarg;
+ insert = TRUE;
+ break;
+
case 'L':
dump = TRUE;
break;
new_chain = optarg;
break;
+ case 'X':
+ delete_chain = optarg;
+ break;
+
case 'd':
if (!inet_pton(AF_INET, optarg, &dst))
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 'm':
xt_m->init(xt_m->m);
if (xt_m != xt_m->next) {
iptables_globals.opts =
- xtables_merge_options(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)
goto out;
}
+ if (delete_chain != NULL) {
+ printf("Delete chain %s\n", delete_chain);
+
+ iptables_delete_chain(table, delete_chain);
+
+ goto out;
+ }
+
if (dump) {
iptables_dump(table);
}
if (chain) {
- if (target_name == NULL)
- return -1;
+ xt_t = prepare_target(table, target_name);
+ if (xt_t == NULL)
+ goto out;
- DBG("Adding %s to %s (match %s)",
- target_name, chain, match_name);
+ 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)
+ goto out;
- ret = iptables_add_rule(table, &ip, chain, target_name, xt_t,
- match_name, xt_m);
+ if (insert == TRUE) {
+ DBG("Inserting %s to %s (match %s)",
+ target_name, chain, match_name);
- goto out;
+ ret = iptables_insert_rule(table, &ip, chain,
+ target_name, xt_t, match_name, xt_m);
+
+ 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, match_name, xt_m);
+
+ goto out;
+ }
}
out:
err = iptables_replace(table, repl);
+ g_free(repl->counters);
g_free(repl);
if (err < 0)
void __connman_iptables_cleanup(void)
{
+ DBG("");
+
g_hash_table_destroy(table_hash);
xtables_free_opts(1);
projects / framework / connectivity / connman.git / blobdiff