* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ * Copyright (C) 2018 Alexander Couzens <lynxis@fe80.eu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
+#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
-#include <unistd.h>
#include <arpa/inet.h>
#include "system.h"
struct vlist_tree iprules;
+static bool iprules_flushed = false;
static unsigned int iprules_counter[2];
enum {
RULE_LOOKUP,
RULE_ACTION,
RULE_GOTO,
+ RULE_SUP_PREFIXLEN,
__RULE_MAX
};
[RULE_TOS] = { .name = "tos", .type = BLOBMSG_TYPE_INT32 },
[RULE_FWMARK] = { .name = "mark", .type = BLOBMSG_TYPE_STRING },
[RULE_LOOKUP] = { .name = "lookup", .type = BLOBMSG_TYPE_STRING },
+ [RULE_SUP_PREFIXLEN] = { .name = "suppress_prefixlength", .type = BLOBMSG_TYPE_INT32 },
[RULE_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_STRING },
[RULE_GOTO] = { .name = "goto", .type = BLOBMSG_TYPE_INT32 },
};
-const struct config_param_list rule_attr_list = {
+const struct uci_blob_param_list rule_attr_list = {
.n_params = __RULE_MAX,
.params = rule_attr,
};
+/* interface based rules are dynamic. */
+static bool rule_ready(struct iprule *rule) {
+ if (rule->flags & IPRULE_OUT && rule->out_dev == NULL)
+ return false;
+
+ if (rule->flags & IPRULE_IN && rule->in_dev == NULL)
+ return false;
+
+ return true;
+}
static bool
iprule_parse_mark(const char *mark, struct iprule *rule)
return true;
}
+/* called on interface changes of the incoming interface */
+static void rule_in_cb(
+ struct interface_user *dep,
+ struct interface *iface,
+ enum interface_event ev)
+{
+ struct iprule *rule = container_of(dep, struct iprule, in_iface_user);
+
+ switch (ev) {
+ case IFEV_UP:
+ if (!iface->l3_dev.dev)
+ break;
+ memcpy(rule->in_dev, iface->l3_dev.dev->ifname, sizeof(rule->in_dev));
+ if (rule_ready(rule))
+ system_add_iprule(rule);
+ break;
+ case IFEV_DOWN:
+ case IFEV_UP_FAILED:
+ case IFEV_FREE:
+ if (rule_ready(rule))
+ system_del_iprule(rule);
+ rule->in_dev[0] = 0;
+ break;
+ default:
+ break;
+ }
+}
+
+/* called on interface changes of the outgoing interface */
+static void rule_out_cb(
+ struct interface_user *dep,
+ struct interface *iface,
+ enum interface_event ev)
+{
+ struct iprule *rule = container_of(dep, struct iprule, out_iface_user);
+
+ switch (ev) {
+ case IFEV_UP:
+ if (!iface->l3_dev.dev)
+ break;
+ memcpy(rule->out_dev, iface->l3_dev.dev->ifname, sizeof(rule->out_dev));
+ if (rule_ready(rule))
+ system_add_iprule(rule);
+ break;
+ case IFEV_DOWN:
+ case IFEV_UP_FAILED:
+ case IFEV_FREE:
+ if (rule_ready(rule))
+ system_del_iprule(rule);
+ rule->out_dev[0] = 0;
+ break;
+ default:
+ break;
+ }
+}
+
+/* called on all interface events */
+static void generic_interface_cb(
+ struct interface_user *dep,
+ struct interface *iface,
+ enum interface_event ev)
+{
+ struct iprule *rule;
+
+ if (ev != IFEV_CREATE)
+ return;
+
+ /* add new interfaces to rules */
+ vlist_for_each_element(&iprules, rule, node) {
+ if (rule_ready(rule))
+ continue;
+
+ if (!strcmp(rule->out_iface, iface->name)) {
+ assert(!rule->out_dev);
+ memcpy(rule->out_dev, iface->l3_dev.dev->ifname, sizeof(rule->out_dev));
+ interface_add_user(&rule->out_iface_user, iface);
+ }
+
+ if (!strcmp(rule->in_iface, iface->name)) {
+ assert(!rule->in_dev);
+ memcpy(rule->in_dev, iface->l3_dev.dev->ifname, sizeof(rule->in_dev));
+ interface_add_user(&rule->in_iface_user, iface);
+ }
+ }
+}
+
+struct interface_user generic_listener = {
+ .cb = generic_interface_cb
+};
+
void
iprule_add(struct blob_attr *attr, bool v6)
{
- struct interface *iif = NULL, *oif = NULL;
struct blob_attr *tb[__RULE_MAX], *cur;
- struct interface *iface;
struct iprule *rule;
+ char *iface_name;
int af = v6 ? AF_INET6 : AF_INET;
blobmsg_parse(rule_attr, __RULE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
rule->invert = blobmsg_get_bool(cur);
if ((cur = tb[RULE_INTERFACE_IN]) != NULL) {
- iif = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
-
- if (!iif || !iif->l3_dev.dev) {
- DPRINTF("Failed to resolve device of network: %s\n", (char *) blobmsg_data(cur));
- goto error;
- }
-
- memcpy(rule->in_dev, iif->l3_dev.dev->ifname, sizeof(rule->in_dev));
+ iface_name = calloc(1, strlen(blobmsg_data(cur)) + 1);
+ rule->in_iface = strcpy(iface_name, blobmsg_data(cur));
+ rule->in_iface_user.cb = &rule_in_cb;
rule->flags |= IPRULE_IN;
}
if ((cur = tb[RULE_INTERFACE_OUT]) != NULL) {
- oif = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
-
- if (!oif || !oif->l3_dev.dev) {
- DPRINTF("Failed to resolve device of network: %s\n", (char *) blobmsg_data(cur));
- goto error;
- }
-
- memcpy(rule->out_dev, oif->l3_dev.dev->ifname, sizeof(rule->out_dev));
+ iface_name = calloc(1, strlen(blobmsg_data(cur)) + 1);
+ rule->out_iface = strcpy(iface_name, blobmsg_data(cur));
+ rule->out_iface_user.cb = &rule_out_cb;
rule->flags |= IPRULE_OUT;
}
rule->flags |= IPRULE_LOOKUP;
}
+ if ((cur = tb[RULE_SUP_PREFIXLEN]) != NULL) {
+ rule->sup_prefixlen = blobmsg_get_u32(cur);
+ rule->flags |= IPRULE_SUP_PREFIXLEN;
+ }
+
if ((cur = tb[RULE_ACTION]) != NULL) {
if (!system_resolve_iprule_action(blobmsg_data(cur), &rule->action)) {
DPRINTF("Failed to parse rule action: %s\n", (char *) blobmsg_data(cur));
void
iprule_update_start(void)
{
+ if (!iprules_flushed) {
+ system_flush_iprules();
+ iprules_flushed = true;
+ }
+
iprules_counter[0] = 1;
iprules_counter[1] = 1;
vlist_update(&iprules);
return memcmp(k1, k2, sizeof(struct iprule)-offsetof(struct iprule, flags));
}
+static void deregister_interfaces(struct iprule *rule)
+{
+ if (rule->flags & IPRULE_IN && rule->in_iface_user.iface)
+ interface_remove_user(&rule->in_iface_user);
+
+ if (rule->flags & IPRULE_OUT && rule->out_iface_user.iface)
+ interface_remove_user(&rule->out_iface_user);
+}
+
+static void register_interfaces(struct iprule *rule)
+{
+ struct interface *iface, *tmp;
+
+ if (rule->flags & IPRULE_IN) {
+ tmp = vlist_find(&interfaces, rule->in_iface, iface, node);
+ if (tmp)
+ interface_add_user(&rule->in_iface_user, tmp);
+ }
+ if (rule->flags & IPRULE_OUT) {
+ tmp = vlist_find(&interfaces, rule->out_iface, iface, node);
+ if (tmp)
+ interface_add_user(&rule->out_iface_user, tmp);
+ }
+}
+
static void
iprule_update_rule(struct vlist_tree *tree,
- struct vlist_node *node_new, struct vlist_node *node_old)
+ struct vlist_node *node_new, struct vlist_node *node_old)
{
struct iprule *rule_old, *rule_new;
rule_new = container_of(node_new, struct iprule, node);
if (node_old) {
- system_del_iprule(rule_old);
+ if (rule_ready(rule_old))
+ system_del_iprule(rule_old);
+
+ if (rule_old->flags & (IPRULE_IN | IPRULE_OUT))
+ deregister_interfaces(rule_old);
+
+ if (rule_old->in_iface)
+ free(rule_old->in_iface);
+
+ if (rule_old->out_iface)
+ free(rule_old->out_iface);
+
free(rule_old);
}
- if (node_new)
- system_add_iprule(rule_new);
+ if (node_new) {
+ /* interface based rules calls system_add_iprule over the event cb */
+ if (rule_new->flags & (IPRULE_IN | IPRULE_OUT)) {
+ register_interfaces(rule_new);
+ } else {
+ system_add_iprule(rule_new);
+ }
+ }
}
static void __init
iprule_init_list(void)
{
vlist_init(&iprules, rule_cmp, iprule_update_rule);
+ interface_add_user(&generic_listener, NULL);
}
projects / project / netifd.git / blobdiff