};
static GHashTable *table_hash = NULL;
+static gboolean debug_enabled = FALSE;
-typedef int (*iterate_entries_cb_t)(struct connman_iptables *table,
- struct ipt_entry *entry, int builtin,
- unsigned int hook, unsigned int offset,
- void *user_data);
+typedef int (*iterate_entries_cb_t)(struct ipt_entry *entry, int builtin,
+ unsigned int hook,size_t size,
+ unsigned int offset, void *user_data);
-static int iterate_entries(struct connman_iptables *table,
- struct ipt_entry *entries,
+static int iterate_entries(struct ipt_entry *entries,
unsigned int valid_hooks,
unsigned int *hook_entry,
size_t size, iterate_entries_cb_t cb,
builtin = h;
}
- err = cb(table, entry, builtin, h, i, user_data);
+ err = cb(entry, builtin, h, size, i, user_data);
if (err < 0)
return err;
return 0;
}
-static unsigned long entry_to_offset(struct connman_iptables *table,
- struct ipt_entry *entry)
+static int print_entry(struct ipt_entry *entry, int builtin, unsigned int hook,
+ size_t size, unsigned int offset,
+ void *user_data)
{
- return (void *)entry - (void *)table->blob_entries->entrytable;
+ iterate_entries_cb_t cb = user_data;
+
+ DBG("entry %p hook %d offset %d size %d", entry, hook,
+ offset, entry->next_offset);
+
+ return cb(entry, builtin, hook, size, offset, NULL);
}
static int target_to_verdict(const char *target_name)
return false;
}
+static gboolean is_fallthrough(struct connman_iptables_entry *e)
+{
+ struct xt_entry_target *target;
+
+ target = ipt_get_target(e->entry);
+ if (!strcmp(target->u.user.name, ""))
+ return true;
+
+ return false;
+}
+
static gboolean is_chain(struct connman_iptables *table,
struct connman_iptables_entry *e)
{
t->verdict += offset;
}
}
+
+ if (is_fallthrough(modified_entry)) {
+ t = (struct xt_standard_target *) ipt_get_target(modified_entry->entry);
+
+ t->verdict = entry_before->offset +
+ modified_entry->entry->target_offset +
+ ALIGN(sizeof(struct xt_standard_target));
+ t->target.u.target_size =
+ ALIGN(sizeof(struct xt_standard_target));
+ }
}
static int iptables_add_entry(struct connman_iptables *table,
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, const char *chain_name,
const char *target_name,
static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
struct xt_entry_target *xt_e_t2)
{
+ unsigned int i;
+
if (xt_e_t1 == NULL || xt_e_t2 == NULL)
return FALSE;
- if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
+ if (strcmp(xt_e_t1->u.user.name, "") == 0 &&
+ strcmp(xt_e_t2->u.user.name, "") == 0) {
+ /* fallthrough */
+ return TRUE;
+ } else 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;
if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
return FALSE;
+
+ for (i = 0; i < xt_e_t1->u.target_size -
+ sizeof(struct xt_standard_target); i++) {
+ if ((xt_e_t1->data[i] ^ xt_e_t2->data[i]) != 0)
+ return FALSE;
+ }
}
return TRUE;
static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
struct xt_entry_match *xt_e_m2)
{
+ unsigned int i;
+
if (xt_e_m1 == NULL || xt_e_m2 == NULL)
return FALSE;
if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
return FALSE;
+ for (i = 0; i < xt_e_m1->u.match_size - sizeof(struct xt_entry_match);
+ i++) {
+ if ((xt_e_m1->data[i] ^ xt_e_m2->data[i]) != 0)
+ return FALSE;
+ }
+
return TRUE;
}
struct xtables_rule_match *xt_rm)
{
struct connman_iptables_entry *entry;
- GList *chain_tail, *list;
+ GList *chain_head, *chain_tail, *list;
int builtin, removed;
removed = 0;
+ chain_head = find_chain_head(table, chain_name);
+ if (chain_head == NULL)
+ return -EINVAL;
+
chain_tail = find_chain_tail(table, chain_name);
if (chain_tail == NULL)
return -EINVAL;
if (list == NULL)
return -EINVAL;
+ entry = chain_head->data;
+ builtin = entry->builtin;
+
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)
return 0;
}
-static int iptables_compare_rule(struct connman_iptables *table,
- struct ipt_ip *ip, const char *chain_name,
- const 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 iptables_change_policy(struct connman_iptables *table,
const char *chain_name, const char *policy)
{
char ip_mask[INET6_ADDRSTRLEN];
if (strlen(ip->iniface))
- connman_info("\tin %s", ip->iniface);
+ DBG("\tin %s", ip->iniface);
if (strlen(ip->outiface))
- connman_info("\tout %s", ip->outiface);
+ DBG("\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);
+ DBG("\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);
+ DBG("\tdst %s/%s", ip_string, ip_mask);
}
static void dump_target(struct ipt_entry *entry)
switch (t->verdict) {
case XT_RETURN:
- connman_info("\ttarget RETURN");
+ DBG("\ttarget RETURN");
break;
case -NF_ACCEPT - 1:
- connman_info("\ttarget ACCEPT");
+ DBG("\ttarget ACCEPT");
break;
case -NF_DROP - 1:
- connman_info("\ttarget DROP");
+ DBG("\ttarget DROP");
break;
case -NF_QUEUE - 1:
- connman_info("\ttarget QUEUE");
+ DBG("\ttarget QUEUE");
break;
case -NF_STOP - 1:
- connman_info("\ttarget STOP");
+ DBG("\ttarget STOP");
break;
default:
- connman_info("\tJUMP (0x%x)", t->verdict);
+ DBG("\tJUMP %u", t->verdict);
break;
}
} else {
xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
if (xt_t == NULL) {
- connman_info("\ttarget %s", target->u.user.name);
+ DBG("\ttarget %s", target->u.user.name);
return;
}
if(xt_t->print != NULL) {
- connman_info("\ttarget ");
+ DBG("\ttarget ");
xt_t->print(NULL, target, 1);
}
}
goto out;
if(xt_m->print != NULL) {
- connman_info("\tmatch ");
+ DBG("\tmatch ");
xt_m->print(NULL, match, 1);
return;
}
out:
- connman_info("\tmatch %s", match->u.user.name);
+ DBG("\tmatch %s", match->u.user.name);
}
-static int dump_entry(struct connman_iptables *table,
- struct ipt_entry *entry, int builtin,
- unsigned int hook, unsigned int offset,
+static int dump_entry(struct ipt_entry *entry, int builtin,
+ unsigned int hook, size_t size, unsigned int offset,
void *user_data)
{
struct xt_entry_target *target;
target = ipt_get_target(entry);
- if (entry_to_offset(table, entry) + entry->next_offset ==
- table->blob_entries->size) {
- connman_info("End of CHAIN 0x%x", offset);
+ if (offset + entry->next_offset == size) {
+ DBG("\tEnd of CHAIN");
return 0;
}
if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
- connman_info("USER CHAIN (%s) %p match %p target %p size %d",
- target->data, entry, entry->elems,
- (char *)entry + entry->target_offset,
- entry->next_offset);
+ DBG("\tUSER CHAIN (%s) match %p target %p",
+ target->data, entry->elems,
+ (char *)entry + entry->target_offset);
return 0;
} else if (builtin >= 0) {
- connman_info("CHAIN (%s) %p match %p target %p size %d",
- hooknames[builtin], entry, entry->elems,
- (char *)entry + entry->target_offset,
- entry->next_offset);
+ DBG("\tCHAIN (%s) match %p target %p",
+ hooknames[builtin], entry->elems,
+ (char *)entry + entry->target_offset);
} else {
- connman_info("RULE %p match %p target %p size %d", entry,
+ DBG("\tRULE match %p target %p",
entry->elems,
- (char *)entry + entry->target_offset,
- entry->next_offset);
+ (char *)entry + entry->target_offset);
}
dump_match(entry);
return 0;
}
-static void iptables_dump(struct connman_iptables *table)
+static void dump_table(struct connman_iptables *table)
{
- connman_info("%s valid_hooks=0x%08x, num_entries=%u, size=%u",
+ DBG("%s valid_hooks=0x%08x, num_entries=%u, size=%u",
table->info->name,
table->info->valid_hooks, table->info->num_entries,
table->info->size);
- iterate_entries(table, table->blob_entries->entrytable,
+ DBG("entry hook: pre/in/fwd/out/post %d/%d/%d/%d/%d",
+ table->info->hook_entry[NF_IP_PRE_ROUTING],
+ table->info->hook_entry[NF_IP_LOCAL_IN],
+ table->info->hook_entry[NF_IP_FORWARD],
+ table->info->hook_entry[NF_IP_LOCAL_OUT],
+ table->info->hook_entry[NF_IP_POST_ROUTING]);
+ DBG("underflow: pre/in/fwd/out/post %d/%d/%d/%d/%d",
+ table->info->underflow[NF_IP_PRE_ROUTING],
+ table->info->underflow[NF_IP_LOCAL_IN],
+ table->info->underflow[NF_IP_FORWARD],
+ table->info->underflow[NF_IP_LOCAL_OUT],
+ table->info->underflow[NF_IP_POST_ROUTING]);
+
+ iterate_entries(table->blob_entries->entrytable,
table->info->valid_hooks,
table->info->hook_entry,
table->blob_entries->size,
- dump_entry, NULL);
+ print_entry, dump_entry);
+}
+static void dump_ipt_replace(struct ipt_replace *repl)
+{
+ DBG("%s valid_hooks 0x%08x num_entries %u size %u",
+ repl->name, repl->valid_hooks, repl->num_entries,
+ repl->size);
+
+ DBG("entry hook: pre/in/fwd/out/post %d/%d/%d/%d/%d",
+ repl->hook_entry[NF_IP_PRE_ROUTING],
+ repl->hook_entry[NF_IP_LOCAL_IN],
+ repl->hook_entry[NF_IP_FORWARD],
+ repl->hook_entry[NF_IP_LOCAL_OUT],
+ repl->hook_entry[NF_IP_POST_ROUTING]);
+ DBG("underflow: pre/in/fwd/out/post %d/%d/%d/%d/%d",
+ repl->underflow[NF_IP_PRE_ROUTING],
+ repl->underflow[NF_IP_LOCAL_IN],
+ repl->underflow[NF_IP_FORWARD],
+ repl->underflow[NF_IP_LOCAL_OUT],
+ repl->underflow[NF_IP_POST_ROUTING]);
+
+ iterate_entries(repl->entries, repl->valid_hooks,
+ repl->hook_entry, repl->size, print_entry, dump_entry);
}
static int iptables_get_entries(struct connman_iptables *table)
sizeof(*r) + r->size);
}
-static int add_entry(struct connman_iptables *table, struct ipt_entry *entry,
- int builtin, unsigned int hook, unsigned offset,
- void *user_data)
+static int add_entry(struct ipt_entry *entry, int builtin, unsigned int hook,
+ size_t size, unsigned offset, void *user_data)
{
+ struct connman_iptables *table = user_data;
struct ipt_entry *new_entry;
new_entry = g_try_malloc0(entry->next_offset);
memcpy(table->hook_entry, table->info->hook_entry,
sizeof(table->info->hook_entry));
- iterate_entries(table, table->blob_entries->entrytable,
+ iterate_entries(table->blob_entries->entrytable,
table->info->valid_hooks, table->info->hook_entry,
- table->blob_entries->size, add_entry, NULL);
+ table->blob_entries->size, add_entry, table);
g_hash_table_insert(table_hash, g_strdup(table_name), table);
+ if (debug_enabled == TRUE)
+ dump_table(table);
+
return table;
err:
}
}
-static int iptables_command(int argc, char *argv[])
-{
- struct connman_iptables *table;
- struct xtables_rule_match *xt_rm, *tmp_xt_rm;
- struct xtables_match *xt_m, *xt_m_t;
+struct parse_context {
+ int argc;
+ char **argv;
+ struct ipt_ip *ip;
struct xtables_target *xt_t;
- struct ipt_ip ip;
- char *table_name, *chain, *new_chain, *match_name, *target_name;
- char *flush_chain, *delete_chain, *policy;
- int c, ret, in_len, out_len;
- gboolean dump, invert, insert, delete, compare;
+ struct xtables_match *xt_m;
+ struct xtables_rule_match *xt_rm;
+};
- if (argc == 0)
- return -EINVAL;
+static int prepare_getopt_args(const char *str, struct parse_context *ctx)
+{
+ char **tokens;
+ int i;
- dump = FALSE;
- invert = FALSE;
- insert = FALSE;
- delete = FALSE;
- compare = FALSE;
- chain = new_chain = match_name = target_name = NULL;
- flush_chain = delete_chain = policy = table_name = NULL;
- memset(&ip, 0, sizeof(struct ipt_ip));
- table = NULL;
- xt_rm = NULL;
- xt_m = NULL;
- xt_t = NULL;
- /* Default code for options parsing */
- ret = -EINVAL;
+ tokens = g_strsplit_set(str, " ", -1);
- clear_tables_flags();
+ for (i = 0; tokens[i]; i++);
- /* extension's options will generate false-positives errors */
- opterr = 0;
+ /* Add space for the argv[0] value */
+ ctx->argc = i + 1;
- optind = 0;
+ /* Don't forget the last NULL entry */
+ ctx->argv = g_try_malloc0((ctx->argc + 1) * sizeof(char *));
+ if (ctx->argv == NULL) {
+ g_strfreev(tokens);
+ return -ENOMEM;
+ }
- while ((c = getopt_long(argc, argv,
- "-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;
+ /*
+ * getopt_long() jumps over the first token; we need to add some
+ * random argv[0] entry.
+ */
+ ctx->argv[0] = g_strdup("argh");
+ for (i = 1; i < ctx->argc; i++)
+ ctx->argv[i] = tokens[i - 1];
- chain = optarg;
- break;
+ return 0;
+}
- case 'C':
- /* It is either -A, -C, -D or -I at once */
- if (chain)
- goto out;
+#if XTABLES_VERSION_CODE > 5
- chain = optarg;
- compare = TRUE;
- break;
+static int parse_xt_modules(int c, connman_bool_t invert,
+ struct parse_context *ctx)
+{
+ struct xtables_match *m;
+ struct xtables_rule_match *rm;
- case 'D':
- /* It is either -A, -C, -D or -I at once */
- if (chain)
- goto out;
+ DBG("xtables version code > 5");
- chain = optarg;
- delete = TRUE;
- break;
+ for (rm = ctx->xt_rm; rm != NULL; rm = rm->next) {
+ if (rm->completed != 0)
+ continue;
- case 'F':
- flush_chain = optarg;
- break;
+ m = rm->match;
- case 'I':
- /* It is either -A, -C, -D or -I at once */
- if (chain)
- goto out;
+ if (m->x6_parse == NULL && m->parse == NULL)
+ continue;
- chain = optarg;
- insert = TRUE;
- break;
+ if (c < (int) m->option_offset ||
+ c >= (int) m->option_offset
+ + XT_OPTION_OFFSET_SCALE)
+ continue;
- case 'L':
- dump = TRUE;
- break;
+ xtables_option_mpcall(c, ctx->argv, invert, m, NULL);
+ }
- case 'N':
- new_chain = optarg;
- break;
+ if (ctx->xt_t == NULL)
+ return 0;
- case 'P':
- chain = optarg;
- if (optind < argc)
- policy = argv[optind++];
- else
- goto out;
+ if (ctx->xt_t->x6_parse == NULL && ctx->xt_t->parse == NULL)
+ return 0;
- break;
+ if (c < (int) ctx->xt_t->option_offset ||
+ c >= (int) ctx->xt_t->option_offset
+ + XT_OPTION_OFFSET_SCALE)
+ return 0;
- case 'X':
- delete_chain = optarg;
- break;
+ xtables_option_tpcall(c, ctx->argv, invert, ctx->xt_t, NULL);
- case 'd':
- if (!parse_ip_and_mask(optarg, &ip.dst, &ip.dmsk))
- break;
+ return 0;
+}
- if (invert)
- ip.invflags |= IPT_INV_DSTIP;
+static int final_check_xt_modules(struct parse_context *ctx)
+{
+ struct xtables_rule_match *rm;
- break;
+ DBG("xtables version code > 5");
- case 'i':
- in_len = strlen(optarg);
+ for (rm = ctx->xt_rm; rm != NULL; rm = rm->next)
+ xtables_option_mfcall(rm->match);
- if (in_len + 1 > IFNAMSIZ)
- break;
+ if (ctx->xt_t != NULL)
+ xtables_option_tfcall(ctx->xt_t);
- strcpy(ip.iniface, optarg);
- memset(ip.iniface_mask, 0xff, in_len + 1);
+ return 0;
+}
- if (invert)
- ip.invflags |= IPT_INV_VIA_IN;
+#else
- break;
+static int parse_xt_modules(int c, connman_bool_t invert,
+ struct parse_context *ctx)
+{
+ struct xtables_match *m;
+ struct xtables_rule_match *rm;
+ int err;
- case 'j':
- target_name = optarg;
+ DBG("xtables version code <= 5");
- table = pre_load_table(table_name, table);
- if (table == NULL)
- goto out;
+ for (rm = ctx->xt_rm; rm != NULL; rm = rm->next) {
+ if (rm->completed == 1)
+ continue;
- xt_t = prepare_target(table, target_name);
- if (xt_t == NULL)
- goto out;
+ m = rm->match;
- break;
+ if (m->parse == NULL)
+ continue;
- case 'm':
- match_name = optarg;
+ err = m->parse(c - m->option_offset,
+ argv, invert, &m->mflags,
+ NULL, &m->m);
+ if (err > 0)
+ return -err;
+ }
- table = pre_load_table(table_name, table);
- if (table == NULL)
- goto out;
+ if (ctx->xt_t == NULL)
+ return 0;
- xt_m = prepare_matches(table, &xt_rm, match_name);
- if (xt_m == NULL)
- goto out;
+ if (ctx->xt_t->parse == NULL)
+ return 0;
- break;
+ err = ctx->xt_m->parse(c - ctx->xt_m->option_offset,
+ ctx->argv, invert, &ctx->xt_m->mflags,
+ NULL, &ctx->xt_m->m);
+ return -err;
+}
- case 'o':
- out_len = strlen(optarg);
+static int final_check_xt_modules(struct parse_context *ctx)
+{
+ struct xtables_rule_match *rm;
- if (out_len + 1 > IFNAMSIZ)
- break;
+ DBG("xtables version code <= 5");
+
+ for (rm = ctx->xt_rm; rm != NULL; rm = rm->next)
+ if (rm->match->final_check != NULL)
+ rm->match->final_check(rm->match->mflags);
+
+ if (ctx->xt_t != NULL && ctx->xt_t->final_check != NULL)
+ ctx->xt_t->final_check(ctx->xt_t->tflags);
+
+ return 0;
+}
+
+#endif
+
+static int parse_rule_spec(struct connman_iptables *table,
+ struct parse_context *ctx)
+{
+ /*
+ * How the parser works:
+ *
+ * - If getopt finds 's', 'd', 'i', 'o'.
+ * just extract the information.
+ * - if '!' is found, set the invert flag to true and
+ * removes the '!' from the optarg string and jumps
+ * back to getopt to reparse the current optarg string.
+ * After reparsing the invert flag is reseted to false.
+ * - If 'm' or 'j' is found then call either
+ * prepare_matches() or prepare_target(). Those function
+ * will modify (extend) the longopts for getopt_long.
+ * That means getopt will change its matching context according
+ * the loaded target.
+ *
+ * Here an example with iptables-test
+ *
+ * argv[0] = ./tools/iptables-test
+ * argv[1] = -t
+ * argv[2] = filter
+ * argv[3] = -A
+ * argv[4] = INPUT
+ * argv[5] = -m
+ * argv[6] = mark
+ * argv[7] = --mark
+ * argv[8] = 999
+ * argv[9] = -j
+ * argv[10] = LOG
+ *
+ * getopt found 'm' then the optarg is "mark" and optind 7
+ * The longopts array containts before hitting the `case 'm'`
+ *
+ * val A has_arg 1 name append
+ * val C has_arg 1 name compare
+ * val D has_arg 1 name delete
+ * val F has_arg 1 name flush-chain
+ * val I has_arg 1 name insert
+ * val L has_arg 2 name list
+ * val N has_arg 1 name new-chain
+ * val P has_arg 1 name policy
+ * val X has_arg 1 name delete-chain
+ * val d has_arg 1 name destination
+ * val i has_arg 1 name in-interface
+ * val j has_arg 1 name jump
+ * val m has_arg 1 name match
+ * val o has_arg 1 name out-interface
+ * val s has_arg 1 name source
+ * val t has_arg 1 name table
+ *
+ * After executing the `case 'm'` block longopts is
+ *
+ * val A has_arg 1 name append
+ * val C has_arg 1 name compare
+ * val D has_arg 1 name delete
+ * val F has_arg 1 name flush-chain
+ * val I has_arg 1 name insert
+ * val L has_arg 2 name list
+ * val N has_arg 1 name new-chain
+ * val P has_arg 1 name policy
+ * val X has_arg 1 name delete-chain
+ * val d has_arg 1 name destination
+ * val i has_arg 1 name in-interface
+ * val j has_arg 1 name jump
+ * val m has_arg 1 name match
+ * val o has_arg 1 name out-interface
+ * val s has_arg 1 name source
+ * val t has_arg 1 name table
+ * val has_arg 1 name mark
+ *
+ * So the 'mark' matcher has added the 'mark' options
+ * and getopt will then return c '256' optarg "999" optind 9
+ * And we will hit the 'default' statement which then
+ * will call the matchers parser (xt_m->parser() or
+ * xtables_option_mpcall() depending on which version
+ * of libxtables is found.
+ */
+ connman_bool_t invert = FALSE;
+ int len, c, err;
+
+ DBG("");
+
+ ctx->ip = g_try_new0(struct ipt_ip, 1);
+ if (ctx->ip == NULL)
+ return -ENOMEM;
- strcpy(ip.outiface, optarg);
- memset(ip.outiface_mask, 0xff, out_len + 1);
+ /*
+ * As side effect parsing a rule sets some global flags
+ * which will be evaluated/verified. Let's reset them
+ * to ensure we can parse more than one rule.
+ */
+ clear_tables_flags();
+
+ /*
+ * Tell getopt_long not to generate error messages for unknown
+ * options and also reset optind back to 0.
+ */
+ opterr = 0;
+ optind = 0;
+
+ while ((c = getopt_long(ctx->argc, ctx->argv,
+ "-:d:i:o:s:m:j:",
+ iptables_globals.opts, NULL)) != -1) {
+ switch (c) {
+ case 's':
+ /* Source specification */
+ if (!parse_ip_and_mask(optarg,
+ &ctx->ip->src,
+ &ctx->ip->smsk))
+ break;
if (invert)
- ip.invflags |= IPT_INV_VIA_OUT;
+ ctx->ip->invflags |= IPT_INV_SRCIP;
break;
+ case 'd':
+ /* Destination specification */
+ if (!parse_ip_and_mask(optarg,
+ &ctx->ip->dst,
+ &ctx->ip->dmsk))
+ break;
- case 's':
- if (!parse_ip_and_mask(optarg, &ip.src, &ip.smsk))
+ if (invert)
+ ctx->ip->invflags |= IPT_INV_DSTIP;
+ break;
+ case 'i':
+ /* In interface specification */
+ len = strlen(optarg);
+
+ if (len + 1 > IFNAMSIZ)
break;
+ strcpy(ctx->ip->iniface, optarg);
+ memset(ctx->ip->iniface_mask, 0xff, len + 1);
+
if (invert)
- ip.invflags |= IPT_INV_SRCIP;
+ ctx->ip->invflags |= IPT_INV_VIA_IN;
break;
+ case 'o':
+ /* Out interface specification */
+ len = strlen(optarg);
+
+ if (len + 1 > IFNAMSIZ)
+ break;
- case 't':
- table_name = optarg;
+ strcpy(ctx->ip->outiface, optarg);
+ memset(ctx->ip->outiface_mask, 0xff, len + 1);
- table = pre_load_table(table_name, table);
- if (table == NULL)
+ if (invert)
+ ctx->ip->invflags |= IPT_INV_VIA_OUT;
+
+ break;
+ case 'm':
+ /* Matches */
+ ctx->xt_m = prepare_matches(table, &ctx->xt_rm, optarg);
+ if (ctx->xt_m == NULL) {
+ err = -EINVAL;
goto out;
+ }
break;
+ case 'j':
+ /* Target */
+ ctx->xt_t = prepare_target(table, optarg);
+ if (ctx->xt_t == NULL) {
+ err = -EINVAL;
+ goto out;
+ }
+ break;
case 1:
if (optarg[0] == '!' && optarg[1] == '\0') {
invert = TRUE;
+
+ /* Remove the '!' from the optarg */
optarg[0] = '\0';
+
+ /*
+ * And recall getopt_long without reseting
+ * invert.
+ */
continue;
}
- connman_error("Invalid option");
-
- goto out;
-
+ break;
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);
+ err = parse_xt_modules(c, invert, ctx);
+ if (err == 1)
+ continue;
- 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 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 = pre_load_table(table_name, table);
- if (table == NULL)
- goto out;
+ err = final_check_xt_modules(ctx);
- /* Option parsing went fine, falling back to succes code */
- ret = 0;
+out:
+ return err;
+}
- if (delete_chain != NULL) {
- printf("Delete chain %s\n", delete_chain);
+static void cleanup_parse_context(struct parse_context *ctx)
+{
+ g_strfreev(ctx->argv);
+ g_free(ctx->ip);
+ if (ctx->xt_t != NULL)
+ g_free(ctx->xt_t->t);
+ if (ctx->xt_m != NULL)
+ g_free(ctx->xt_m->m);
+ g_free(ctx);
+}
- iptables_delete_chain(table, delete_chain);
+int __connman_iptables_new_chain(const char *table_name,
+ const char *chain)
+{
+ struct connman_iptables *table;
- goto out;
- }
+ DBG("-t %s -N %s", table_name, chain);
- if (dump) {
- iptables_dump(table);
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL)
+ return -EINVAL;
- goto out;
- }
+ return iptables_add_chain(table, chain);
+}
- if (flush_chain) {
- DBG("Flush chain %s", flush_chain);
+int __connman_iptables_delete_chain(const char *table_name,
+ const char *chain)
+{
+ struct connman_iptables *table;
- iptables_flush_chain(table, flush_chain);
+ DBG("-t %s -X %s", table_name, chain);
- goto out;
- }
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL)
+ return -EINVAL;
- if (chain && new_chain) {
- ret = -EINVAL;
- goto out;
- }
+ return iptables_delete_chain(table, chain);
+}
- if (new_chain) {
- DBG("New chain %s", new_chain);
+int __connman_iptables_flush_chain(const char *table_name,
+ const char *chain)
+{
+ struct connman_iptables *table;
- ret = iptables_add_chain(table, new_chain);
- goto out;
- }
+ DBG("-t %s -F %s", table_name, chain);
- if (chain) {
- if (policy != NULL) {
- printf("Changing policy of %s to %s\n", chain, policy);
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL)
+ return -EINVAL;
- iptables_change_policy(table, chain, policy);
+ return iptables_flush_chain(table, chain);
+}
- goto out;
- }
+int __connman_iptables_change_policy(const char *table_name,
+ const char *chain,
+ const char *policy)
+{
+ struct connman_iptables *table;
- if (xt_t == NULL)
- goto out;
+ DBG("-t %s -F %s", table_name, chain);
- if (compare == TRUE) {
- ret = iptables_compare_rule(table, &ip, chain,
- target_name, xt_t, xt_m, xt_rm);
- goto out;
- }
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL)
+ return -EINVAL;
- if (delete == TRUE) {
- DBG("Deleting %s to %s (match %s)\n",
- target_name, chain, match_name);
+ return iptables_change_policy(table, chain, policy);
+}
- ret = iptables_delete_rule(table, &ip, chain,
- target_name, xt_t, xt_m, xt_rm);
+int __connman_iptables_append(const char *table_name,
+ const char *chain,
+ const char *rule_spec)
+{
+ struct connman_iptables *table;
+ struct parse_context *ctx;
+ const char *target_name;
+ int err;
- goto out;
- }
+ ctx = g_try_new0(struct parse_context, 1);
+ if (ctx == NULL)
+ return -ENOMEM;
- if (insert == TRUE) {
- DBG("Inserting %s to %s (match %s)",
- target_name, chain, match_name);
+ DBG("-t %s -A %s %s", table_name, chain, rule_spec);
- ret = iptables_insert_rule(table, &ip, chain,
- target_name, xt_t, xt_rm);
+ err = prepare_getopt_args(rule_spec, ctx);
+ if (err < 0)
+ goto out;
- goto out;
- } else {
- DBG("Adding %s to %s (match %s)",
- target_name, chain, match_name);
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL) {
+ err = -EINVAL;
+ goto out;
+ }
- ret = iptables_append_rule(table, &ip, chain,
- target_name, xt_t, xt_rm);
+ err = parse_rule_spec(table, ctx);
+ if (err < 0)
+ goto out;
- goto out;
- }
- }
+ if (ctx->xt_t == NULL)
+ target_name = NULL;
+ else
+ target_name = ctx->xt_t->name;
+ err = iptables_insert_rule(table, ctx->ip, chain,
+ target_name, ctx->xt_t, ctx->xt_rm);
out:
- if (xt_t)
- g_free(xt_t->t);
+ cleanup_parse_context(ctx);
- if (xt_m)
- g_free(xt_m->m);
-
- return ret;
+ return err;
}
-int __connman_iptables_command(const char *format, ...)
+int __connman_iptables_delete(const char *table_name,
+ const char *chain,
+ const char *rule_spec)
{
- char **argv, **arguments, *command;
- int argc, i, ret;
- va_list args;
-
- if (format == NULL)
- return -EINVAL;
-
- va_start(args, format);
-
- command = g_strdup_vprintf(format, args);
-
- va_end(args);
+ struct connman_iptables *table;
+ struct parse_context *ctx;
+ const char *target_name;
+ int err;
- if (command == NULL)
+ ctx = g_try_new0(struct parse_context, 1);
+ if (ctx == NULL)
return -ENOMEM;
- arguments = g_strsplit_set(command, " ", -1);
-
- for (argc = 0; arguments[argc]; argc++);
- ++argc;
+ DBG("-t %s -D %s %s", table_name, chain, rule_spec);
- DBG("command %s argc %d", command, argc);
+ err = prepare_getopt_args(rule_spec, ctx);
+ if (err < 0)
+ goto out;
- argv = g_try_malloc0(argc * sizeof(char *));
- if (argv == NULL) {
- g_free(command);
- g_strfreev(arguments);
- return -ENOMEM;
+ table = pre_load_table(table_name, NULL);
+ if (table == NULL) {
+ err = -EINVAL;
+ goto out;
}
- argv[0] = "iptables";
- for (i = 1; i < argc; i++)
- argv[i] = arguments[i - 1];
+ err = parse_rule_spec(table, ctx);
+ if (err < 0)
+ goto out;
- ret = iptables_command(argc, argv);
+ if (ctx->xt_t == NULL)
+ target_name = NULL;
+ else
+ target_name = ctx->xt_t->name;
- g_free(command);
- g_strfreev(arguments);
- g_free(argv);
+ err = iptables_delete_rule(table, ctx->ip, chain,
+ target_name, ctx->xt_t, ctx->xt_m,
+ ctx->xt_rm);
+out:
+ cleanup_parse_context(ctx);
- return ret;
+ return err;
}
-
int __connman_iptables_commit(const char *table_name)
{
struct connman_iptables *table;
repl = iptables_blob(table);
+ if (debug_enabled == TRUE)
+ dump_ipt_replace(repl);
+
err = iptables_replace(table, repl);
g_free(repl->counters);
table_cleanup(table);
}
+static int flush_table_cb(struct ipt_entry *entry, int builtin,
+ unsigned int hook, size_t size,
+ unsigned int offset, void *user_data)
+{
+ GSList **chains = user_data;
+ struct xt_entry_target *target;
+ char *name;
+
+ if (offset + entry->next_offset == size)
+ return 0;
+
+ target = ipt_get_target(entry);
+
+ if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
+ name = g_strdup((const char*)target->data);
+ else if (builtin >= 0)
+ name = g_strdup(hooknames[builtin]);
+ else
+ return 0;
+
+ *chains = g_slist_prepend(*chains, name);
+
+ return 0;
+}
+
+static void flush_table(const char *name)
+{
+ GSList *chains = NULL, *list;
+ struct connman_iptables *table;
+
+ table = pre_load_table(name, NULL);
+ if (table == NULL)
+ return;
+
+ iterate_entries(table->blob_entries->entrytable,
+ table->info->valid_hooks,
+ table->info->hook_entry,
+ table->blob_entries->size,
+ flush_table_cb, &chains);
+
+ for (list = chains; list != NULL; list = list->next) {
+ char *chain = list->data;
+
+ DBG("chain %s", chain);
+ iptables_flush_chain(table, chain);
+ }
+
+ __connman_iptables_commit(name);
+ g_slist_free_full(chains, g_free);
+}
+
+static void flush_all_chains(void)
+{
+ flush_table("filter");
+ flush_table("mangle");
+ flush_table("nat");
+}
+
int __connman_iptables_init(void)
{
DBG("");
+ if (getenv("CONNMAN_IPTABLES_DEBUG"))
+ debug_enabled = TRUE;
+
table_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
g_free, remove_table);
xtables_init_all(&iptables_globals, NFPROTO_IPV4);
- return 0;
+ flush_all_chains();
+ return 0;
}
void __connman_iptables_cleanup(void)
projects / platform / upstream / connman.git / blobdiff