+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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 published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
+#include "device.h"
+#include "interface.h"
+#include "interface-ip.h"
+#include "proto.h"
#include "ubus.h"
+#include "config.h"
+#include "system.h"
-LIST_HEAD(interfaces);
+struct vlist_tree interfaces;
+static LIST_HEAD(iface_all_users);
+enum {
+ IFACE_ATTR_IFNAME,
+ IFACE_ATTR_PROTO,
+ IFACE_ATTR_AUTO,
+ IFACE_ATTR_DEFAULTROUTE,
+ IFACE_ATTR_PEERDNS,
+ IFACE_ATTR_DNS,
+ IFACE_ATTR_DNS_SEARCH,
+ IFACE_ATTR_DNS_METRIC,
+ IFACE_ATTR_METRIC,
+ IFACE_ATTR_INTERFACE,
+ IFACE_ATTR_IP6ASSIGN,
+ IFACE_ATTR_IP6HINT,
+ IFACE_ATTR_IP4TABLE,
+ IFACE_ATTR_IP6TABLE,
+ IFACE_ATTR_IP6CLASS,
+ IFACE_ATTR_DELEGATE,
+ IFACE_ATTR_IP6IFACEID,
+ IFACE_ATTR_FORCE_LINK,
+ IFACE_ATTR_IP6WEIGHT,
+ IFACE_ATTR_MAX
+};
+
+static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
+ [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
+ [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
+ [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
+ [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
+ [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
+ [IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
+ [IFACE_ATTR_DNS_METRIC] = { .name = "dns_metric", .type = BLOBMSG_TYPE_INT32 },
+ [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
+ [IFACE_ATTR_IP6HINT] = { .name = "ip6hint", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
+ [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
+ [IFACE_ATTR_IP6IFACEID] = { .name = "ip6ifaceid", .type = BLOBMSG_TYPE_STRING },
+ [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
+ [IFACE_ATTR_IP6WEIGHT] = { .name = "ip6weight", .type = BLOBMSG_TYPE_INT32 },
+};
+
+const struct uci_blob_param_list interface_attr_list = {
+ .n_params = IFACE_ATTR_MAX,
+ .params = iface_attrs,
+};
+
+static void
+set_config_state(struct interface *iface, enum interface_config_state s);
static void
-clear_interface_errors(struct interface *iface)
+interface_event(struct interface *iface, enum interface_event ev);
+
+static void
+interface_error_flush(struct interface *iface)
{
struct interface_error *error, *tmp;
}
}
+static void
+interface_clear_errors(struct interface *iface)
+{
+ /* don't flush the errors in case the configured protocol handler matches the
+ running protocol handler and is having the last error capability */
+ if (!(iface->proto &&
+ (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
+ (iface->proto->handler->name == iface->proto_handler->name)))
+ interface_error_flush(iface);
+}
+
void interface_add_error(struct interface *iface, const char *subsystem,
const char *code, const char **data, int n_data)
{
struct interface_error *error;
int i, len = 0;
- int *datalen;
- char *dest;
+ int *datalen = NULL;
+ char *dest, *d_subsys, *d_code;
+
+ /* if the configured protocol handler has the last error support capability,
+ errors should only be added if the running protocol handler matches the
+ configured one */
+ if (iface->proto &&
+ (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
+ (iface->proto->handler->name != iface->proto_handler->name))
+ return;
if (n_data) {
len = n_data * sizeof(char *);
}
}
- error = calloc(1, sizeof(*error) + sizeof(char *) + len);
+ error = calloc_a(sizeof(*error) + sizeof(char *) + len,
+ &d_subsys, subsystem ? strlen(subsystem) + 1 : 0,
+ &d_code, code ? strlen(code) + 1 : 0);
if (!error)
return;
+ /* Only keep the last flagged error, prevent this list grows unlimitted in case the
+ protocol can't be established (e.g auth failure) */
+ if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
+ interface_error_flush(iface);
+
list_add_tail(&error->list, &iface->errors);
- error->subsystem = subsystem;
- error->code = code;
dest = (char *) &error->data[n_data + 1];
for (i = 0; i < n_data; i++) {
dest += datalen[i];
}
error->data[n_data] = NULL;
+
+ if (subsystem)
+ error->subsystem = strcpy(d_subsys, subsystem);
+
+ if (code)
+ error->code = strcpy(d_code, code);
}
-static int
+static void
+interface_data_del(struct interface *iface, struct interface_data *data)
+{
+ avl_delete(&iface->data, &data->node);
+ free(data);
+}
+
+static void
+interface_data_flush(struct interface *iface)
+{
+ struct interface_data *d, *tmp;
+
+ avl_for_each_element_safe(&iface->data, d, node, tmp)
+ interface_data_del(iface, d);
+}
+
+int
+interface_add_data(struct interface *iface, const struct blob_attr *data)
+{
+ struct interface_data *n, *o;
+
+ if (!blobmsg_check_attr(data, true))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ const char *name = blobmsg_name(data);
+ unsigned len = blob_pad_len(data);
+
+ o = avl_find_element(&iface->data, name, o, node);
+ if (o) {
+ if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
+ return 0;
+
+ interface_data_del(iface, o);
+ }
+
+ n = calloc(1, sizeof(*n) + len);
+ if (!n)
+ return UBUS_STATUS_UNKNOWN_ERROR;
+
+ memcpy(n->data, data, len);
+ n->node.key = blobmsg_name(n->data);
+ avl_insert(&iface->data, &n->node);
+
+ iface->updated |= IUF_DATA;
+ return 0;
+}
+
+int interface_parse_data(struct interface *iface, const struct blob_attr *attr)
+{
+ struct blob_attr *cur;
+ int rem, ret;
+
+ iface->updated = 0;
+
+ blob_for_each_attr(cur, attr, rem) {
+ ret = interface_add_data(iface, cur);
+ if (ret)
+ return ret;
+ }
+
+ if (iface->updated && iface->state == IFS_UP)
+ interface_event(iface, IFEV_UPDATE);
+
+ return 0;
+}
+
+static void
interface_event(struct interface *iface, enum interface_event ev)
{
- if (!iface->state || !iface->state->event)
- return 0;
+ struct interface_user *dep, *tmp;
+ struct device *adev = NULL;
- return iface->state->event(iface, iface->state, ev);
+ list_for_each_entry_safe(dep, tmp, &iface->users, list)
+ dep->cb(dep, iface, ev);
+
+ list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
+ dep->cb(dep, iface, ev);
+
+ switch (ev) {
+ case IFEV_UP:
+ interface_error_flush(iface);
+ adev = iface->l3_dev.dev;
+ /* fall through */
+ case IFEV_DOWN:
+ case IFEV_UP_FAILED:
+ alias_notify_device(iface->name, adev);
+ break;
+ default:
+ break;
+ }
}
static void
-__set_interface_up(struct interface *iface)
+interface_flush_state(struct interface *iface)
{
- if (iface->up)
- return;
+ if (iface->l3_dev.dev)
+ device_release(&iface->l3_dev);
+ interface_data_flush(iface);
+}
- if (claim_device(iface->main_dev.dev) < 0)
- return;
+static void
+mark_interface_down(struct interface *iface)
+{
+ enum interface_state state = iface->state;
- if (interface_event(iface, IFEV_UP) < 0) {
- release_device(iface->main_dev.dev);
+ if (state == IFS_DOWN)
return;
+
+ iface->link_up_event = false;
+ iface->state = IFS_DOWN;
+ if (state == IFS_UP)
+ interface_event(iface, IFEV_DOWN);
+ else
+ interface_event(iface, IFEV_UP_FAILED);
+ interface_ip_set_enabled(&iface->config_ip, false);
+ interface_ip_set_enabled(&iface->proto_ip, false);
+ interface_ip_flush(&iface->proto_ip);
+ interface_flush_state(iface);
+ system_flush_routes();
+}
+
+void
+__interface_set_down(struct interface *iface, bool force)
+{
+ enum interface_state state = iface->state;
+ switch (state) {
+ case IFS_UP:
+ case IFS_SETUP:
+ iface->state = IFS_TEARDOWN;
+ if (state == IFS_UP)
+ interface_event(iface, IFEV_DOWN);
+
+ interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
+ if (force)
+ interface_flush_state(iface);
+ break;
+
+ case IFS_DOWN:
+ if (iface->main_dev.dev)
+ device_release(&iface->main_dev);
+ case IFS_TEARDOWN:
+ default:
+ break;
}
+}
- iface->up = true;
+static int
+__interface_set_up(struct interface *iface)
+{
+ int ret;
+
+ netifd_log_message(L_NOTICE, "Interface '%s' is setting up now\n", iface->name);
+
+ iface->state = IFS_SETUP;
+ ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
+ if (ret)
+ mark_interface_down(iface);
+
+ return ret;
}
static void
-__set_interface_down(struct interface *iface)
+interface_check_state(struct interface *iface)
{
- clear_interface_errors(iface);
+ bool link_state = iface->link_state || iface->force_link;
- if (!iface->up)
+ switch (iface->state) {
+ case IFS_UP:
+ case IFS_SETUP:
+ if (!iface->enabled || !link_state) {
+ interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
+ mark_interface_down(iface);
+ }
+ break;
+ case IFS_DOWN:
+ if (!iface->available)
+ return;
+
+ if (iface->autostart && iface->enabled && link_state && !config_init)
+ __interface_set_up(iface);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+interface_set_enabled(struct interface *iface, bool new_state)
+{
+ if (iface->enabled == new_state)
return;
- iface->up = false;
- interface_event(iface, IFEV_DOWN);
- release_device(iface->main_dev.dev);
+ netifd_log_message(L_NOTICE, "Interface '%s' is %s\n", iface->name, new_state ? "enabled" : "disabled");
+ iface->enabled = new_state;
+ interface_check_state(iface);
}
static void
-interface_cb(struct device_user *dep, enum device_event ev)
+interface_set_link_state(struct interface *iface, bool new_state)
+{
+ if (iface->link_state == new_state)
+ return;
+
+ netifd_log_message(L_NOTICE, "Interface '%s' has link connectivity %s\n", iface->name, new_state ? "" : "loss");
+ iface->link_state = new_state;
+ interface_check_state(iface);
+
+ if (new_state && iface->force_link && iface->state == IFS_UP && !iface->link_up_event) {
+ interface_event(iface, IFEV_LINK_UP);
+ iface->link_up_event = true;
+ }
+}
+
+static void
+interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
+{
+ if (ev == DEV_EVENT_REMOVE)
+ device_remove_user(dep);
+}
+
+static void
+interface_main_dev_cb(struct device_user *dep, enum device_event ev)
{
struct interface *iface;
- bool new_state;
+ bool new_state = false;
iface = container_of(dep, struct interface, main_dev);
switch (ev) {
case DEV_EVENT_ADD:
new_state = true;
- break;
case DEV_EVENT_REMOVE:
- new_state = false;
+ interface_set_available(iface, new_state);
+ if (!new_state && dep->dev && dep->dev->external)
+ interface_set_main_dev(iface, NULL);
+ break;
+ case DEV_EVENT_UP:
+ new_state = true;
+ case DEV_EVENT_DOWN:
+ interface_set_enabled(iface, new_state);
break;
+ case DEV_EVENT_LINK_UP:
+ new_state = true;
+ case DEV_EVENT_LINK_DOWN:
+ interface_set_link_state(iface, new_state);
+ break;
+ case DEV_EVENT_TOPO_CHANGE:
+ interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
+ return;
default:
+ break;
+ }
+}
+
+static void
+interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
+{
+ struct interface *iface;
+
+ iface = container_of(dep, struct interface, l3_dev);
+ if (iface->l3_dev.dev == iface->main_dev.dev)
return;
+
+ switch (ev) {
+ case DEV_EVENT_LINK_DOWN:
+ if (iface->proto_handler->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN)
+ interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
+ break;
+ default:
+ break;
}
+}
- if (iface->active == new_state)
+void
+interface_set_available(struct interface *iface, bool new_state)
+{
+ if (iface->available == new_state)
return;
- iface->active = new_state;
+ D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
+ iface->available = new_state;
if (new_state) {
- if (iface->autostart)
- __set_interface_up(iface);
+ if (iface->autostart && !config_init)
+ interface_set_up(iface);
} else
- __set_interface_down(iface);
+ __interface_set_down(iface, true);
}
-struct interface *
-alloc_interface(const char *name)
+void
+interface_add_user(struct interface_user *dep, struct interface *iface)
{
- struct interface *iface;
+ if (!iface) {
+ list_add(&dep->list, &iface_all_users);
+ return;
+ }
- iface = get_interface(name);
- if (iface)
- return iface;
+ dep->iface = iface;
+ list_add(&dep->list, &iface->users);
+ if (iface->state == IFS_UP)
+ dep->cb(dep, iface, IFEV_UP);
+}
- iface = calloc(1, sizeof(*iface));
- iface->main_dev.cb = interface_cb;
- iface->l3_iface = &iface->main_dev;
- strncpy(iface->name, name, sizeof(iface->name) - 1);
- list_add(&iface->list, &interfaces);
- INIT_LIST_HEAD(&iface->errors);
+void
+interface_remove_user(struct interface_user *dep)
+{
+ list_del_init(&dep->list);
+ dep->iface = NULL;
+}
- netifd_ubus_add_interface(iface);
+static void
+interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
+{
+ struct blob_attr *cur;
+ int rem;
- return iface;
+ blobmsg_for_each_attr(cur, list, rem) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ if (!blobmsg_check_attr(cur, NULL))
+ continue;
+
+ struct interface_assignment_class *c = malloc(sizeof(*c) + blobmsg_data_len(cur));
+ memcpy(c->name, blobmsg_data(cur), blobmsg_data_len(cur));
+ list_add(&c->head, &iface->assignment_classes);
+ }
}
-void
-free_interface(struct interface *iface)
+static void
+interface_clear_assignment_classes(struct interface *iface)
+{
+ while (!list_empty(&iface->assignment_classes)) {
+ struct interface_assignment_class *c = list_first_entry(&iface->assignment_classes,
+ struct interface_assignment_class, head);
+ list_del(&c->head);
+ free(c);
+ }
+}
+
+static void
+interface_merge_assignment_data(struct interface *old, struct interface *new)
+{
+ bool changed = (old->assignment_hint != new->assignment_hint ||
+ old->assignment_length != new->assignment_length ||
+ old->assignment_iface_id_selection != new->assignment_iface_id_selection ||
+ old->assignment_weight != new->assignment_weight ||
+ (old->assignment_iface_id_selection == IFID_FIXED &&
+ memcmp(&old->assignment_fixed_iface_id, &new->assignment_fixed_iface_id,
+ sizeof(old->assignment_fixed_iface_id))) ||
+ list_empty(&old->assignment_classes) != list_empty(&new->assignment_classes));
+
+ struct interface_assignment_class *c;
+ list_for_each_entry(c, &new->assignment_classes, head) {
+ // Compare list entries one-by-one to see if there was a change
+ if (list_empty(&old->assignment_classes)) // The new list is longer
+ changed = true;
+
+ if (changed)
+ break;
+
+ struct interface_assignment_class *c_old = list_first_entry(&old->assignment_classes,
+ struct interface_assignment_class, head);
+
+ if (strcmp(c_old->name, c->name)) // An entry didn't match
+ break;
+
+ list_del(&c_old->head);
+ free(c_old);
+ }
+
+ // The old list was longer than the new one or the last entry didn't match
+ if (!list_empty(&old->assignment_classes)) {
+ interface_clear_assignment_classes(old);
+ changed = true;
+ }
+
+ list_splice_init(&new->assignment_classes, &old->assignment_classes);
+
+ if (changed) {
+ old->assignment_hint = new->assignment_hint;
+ old->assignment_length = new->assignment_length;
+ old->assignment_iface_id_selection = new->assignment_iface_id_selection;
+ old->assignment_fixed_iface_id = new->assignment_fixed_iface_id;
+ old->assignment_weight = new->assignment_weight;
+ interface_refresh_assignments(true);
+ }
+}
+
+static void
+interface_alias_cb(struct interface_user *dep, struct interface *iface, enum interface_event ev)
+{
+ struct interface *alias = container_of(dep, struct interface, parent_iface);
+ struct device *dev = iface->l3_dev.dev;
+
+ switch (ev) {
+ case IFEV_UP:
+ if (!dev)
+ return;
+
+ interface_set_main_dev(alias, dev);
+ interface_set_available(alias, true);
+ break;
+ case IFEV_DOWN:
+ case IFEV_UP_FAILED:
+ interface_set_available(alias, false);
+ interface_set_main_dev(alias, NULL);
+ break;
+ case IFEV_FREE:
+ interface_remove_user(dep);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+interface_set_device_config(struct interface *iface, struct device *dev)
+{
+ if (!dev || !dev->default_config)
+ return;
+
+ if (!iface->device_config &&
+ (!dev->iface_config || dev->config_iface != iface))
+ return;
+
+ dev->config_iface = iface;
+ dev->iface_config = iface->device_config;
+ device_apply_config(dev, dev->type, iface->config);
+}
+
+static void
+interface_claim_device(struct interface *iface)
+{
+ struct interface *parent;
+ struct device *dev = NULL;
+
+ if (iface->parent_iface.iface)
+ interface_remove_user(&iface->parent_iface);
+
+ device_lock();
+
+ if (iface->parent_ifname) {
+ parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
+ iface->parent_iface.cb = interface_alias_cb;
+ interface_add_user(&iface->parent_iface, parent);
+ } else if (iface->ifname &&
+ !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
+ dev = device_get(iface->ifname, true);
+ interface_set_device_config(iface, dev);
+ } else {
+ dev = iface->ext_dev.dev;
+ }
+
+ if (dev)
+ interface_set_main_dev(iface, dev);
+
+ device_unlock();
+
+ if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
+ interface_set_available(iface, true);
+}
+
+static void
+interface_cleanup_state(struct interface *iface)
+{
+ interface_set_available(iface, false);
+
+ interface_flush_state(iface);
+ interface_clear_errors(iface);
+ interface_set_proto_state(iface, NULL);
+
+ interface_set_main_dev(iface, NULL);
+ interface_set_l3_dev(iface, NULL);
+}
+
+static void
+interface_cleanup(struct interface *iface)
+{
+ struct interface_user *dep, *tmp;
+
+ uloop_timeout_cancel(&iface->remove_timer);
+ device_remove_user(&iface->ext_dev);
+
+ if (iface->parent_iface.iface)
+ interface_remove_user(&iface->parent_iface);
+
+ list_for_each_entry_safe(dep, tmp, &iface->users, list)
+ interface_remove_user(dep);
+
+ interface_clear_assignment_classes(iface);
+ interface_ip_flush(&iface->config_ip);
+ interface_cleanup_state(iface);
+}
+
+static void
+interface_do_free(struct interface *iface)
{
+ interface_event(iface, IFEV_FREE);
+ interface_cleanup(iface);
+ free(iface->config);
netifd_ubus_remove_interface(iface);
- list_del(&iface->list);
- if (iface->state && iface->state->free)
- iface->state->free(iface, iface->state);
+ avl_delete(&interfaces.avl, &iface->node.avl);
free(iface);
}
+static void
+interface_do_reload(struct interface *iface)
+{
+ interface_event(iface, IFEV_RELOAD);
+ interface_cleanup_state(iface);
+ proto_init_interface(iface, iface->config);
+ interface_claim_device(iface);
+}
+
+static void
+interface_handle_config_change(struct interface *iface)
+{
+ enum interface_config_state state = iface->config_state;
+
+ iface->config_state = IFC_NORMAL;
+ switch(state) {
+ case IFC_NORMAL:
+ break;
+ case IFC_RELOAD:
+ interface_do_reload(iface);
+ break;
+ case IFC_REMOVE:
+ interface_do_free(iface);
+ return;
+ }
+ if (iface->autostart && iface->available)
+ interface_set_up(iface);
+ else if (iface->dynamic)
+ set_config_state(iface, IFC_REMOVE);
+}
+
+static void
+interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
+{
+ struct interface *iface = state->iface;
+
+ switch (ev) {
+ case IFPEV_UP:
+ if (iface->state != IFS_SETUP) {
+ if (iface->state == IFS_UP && iface->updated)
+ interface_event(iface, IFEV_UPDATE);
+ return;
+ }
+
+ if (!iface->l3_dev.dev)
+ interface_set_l3_dev(iface, iface->main_dev.dev);
+
+ interface_ip_set_enabled(&iface->config_ip, true);
+ interface_ip_set_enabled(&iface->proto_ip, true);
+ system_flush_routes();
+ iface->state = IFS_UP;
+ iface->start_time = system_get_rtime();
+ interface_event(iface, IFEV_UP);
+ netifd_log_message(L_NOTICE, "Interface '%s' is now up\n", iface->name);
+ break;
+ case IFPEV_DOWN:
+ if (iface->state == IFS_DOWN)
+ return;
+
+ netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
+ mark_interface_down(iface);
+ if (iface->main_dev.dev)
+ device_release(&iface->main_dev);
+ if (iface->l3_dev.dev)
+ device_remove_user(&iface->l3_dev);
+ interface_handle_config_change(iface);
+ break;
+ case IFPEV_LINK_LOST:
+ if (iface->state != IFS_UP)
+ return;
+
+ netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
+ mark_interface_down(iface);
+ iface->state = IFS_SETUP;
+ break;
+ default:
+ return;
+ }
+
+ interface_write_resolv_conf();
+}
+
+void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
+{
+ if (iface->proto) {
+ iface->proto->free(iface->proto);
+ iface->proto = NULL;
+ }
+ iface->state = IFS_DOWN;
+ iface->proto = state;
+ if (!state)
+ return;
+
+ state->proto_event = interface_proto_event_cb;
+ state->iface = iface;
+}
+
struct interface *
-get_interface(const char *name)
+interface_alloc(const char *name, struct blob_attr *config)
{
struct interface *iface;
+ struct blob_attr *tb[IFACE_ATTR_MAX];
+ struct blob_attr *cur;
+ const char *proto_name = NULL;
+ char *iface_name;
+ bool force_link = false;
+
+ iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
+ iface->name = strcpy(iface_name, name);
+ INIT_LIST_HEAD(&iface->errors);
+ INIT_LIST_HEAD(&iface->users);
+ INIT_LIST_HEAD(&iface->hotplug_list);
+ INIT_LIST_HEAD(&iface->assignment_classes);
+ interface_ip_init(iface);
+ avl_init(&iface->data, avl_strcmp, false, NULL);
+ iface->config_ip.enabled = false;
+
+ iface->main_dev.cb = interface_main_dev_cb;
+ iface->l3_dev.cb = interface_l3_dev_cb;
+ iface->ext_dev.cb = interface_ext_dev_cb;
+
+ blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
+ blob_data(config), blob_len(config));
+
+ if ((cur = tb[IFACE_ATTR_PROTO]))
+ proto_name = blobmsg_data(cur);
+
+ proto_attach_interface(iface, proto_name);
+ if (iface->proto_handler->flags & PROTO_FLAG_FORCE_LINK_DEFAULT)
+ force_link = true;
+
+ iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
+ iface->force_link = blobmsg_get_bool_default(tb[IFACE_ATTR_FORCE_LINK], force_link);
+ iface->proto_ip.no_defaultroute =
+ !blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
+ iface->proto_ip.no_dns =
+ !blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
+
+ if ((cur = tb[IFACE_ATTR_DNS]))
+ interface_add_dns_server_list(&iface->config_ip, cur);
- list_for_each_entry(iface, &interfaces, list) {
- if (!strcmp(iface->name, name))
- return iface;
+ if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
+ interface_add_dns_search_list(&iface->config_ip, cur);
+
+ if ((cur = tb[IFACE_ATTR_DNS_METRIC]))
+ iface->dns_metric = blobmsg_get_u32(cur);
+
+ if ((cur = tb[IFACE_ATTR_METRIC]))
+ iface->metric = blobmsg_get_u32(cur);
+
+ if ((cur = tb[IFACE_ATTR_IP6ASSIGN]))
+ iface->assignment_length = blobmsg_get_u32(cur);
+
+ /* defaults */
+ iface->assignment_iface_id_selection = IFID_FIXED;
+ iface->assignment_fixed_iface_id = in6addr_any;
+ iface->assignment_fixed_iface_id.s6_addr[15] = 1;
+
+ if ((cur = tb[IFACE_ATTR_IP6IFACEID])) {
+ const char *ifaceid = blobmsg_data(cur);
+ if (!strcmp(ifaceid, "random")) {
+ iface->assignment_iface_id_selection = IFID_RANDOM;
+ }
+ else if (!strcmp(ifaceid, "eui64")) {
+ iface->assignment_iface_id_selection = IFID_EUI64;
+ }
+ else {
+ /* we expect an IPv6 address with network id zero here -> fixed iface id
+ if we cannot parse -> revert to iface id 1 */
+ if (inet_pton(AF_INET6,ifaceid,&iface->assignment_fixed_iface_id) != 1 ||
+ iface->assignment_fixed_iface_id.s6_addr32[0] != 0 ||
+ iface->assignment_fixed_iface_id.s6_addr32[1] != 0) {
+ iface->assignment_fixed_iface_id = in6addr_any;
+ iface->assignment_fixed_iface_id.s6_addr[15] = 1;
+ netifd_log_message(L_WARNING, "Failed to parse ip6ifaceid for interface '%s', \
+ falling back to iface id 1.\n", iface->name);
+ }
+ }
+ }
+
+ iface->assignment_hint = -1;
+ if ((cur = tb[IFACE_ATTR_IP6HINT]))
+ iface->assignment_hint = strtol(blobmsg_get_string(cur), NULL, 16) &
+ ~((1 << (64 - iface->assignment_length)) - 1);
+
+ if ((cur = tb[IFACE_ATTR_IP6CLASS]))
+ interface_add_assignment_classes(iface, cur);
+
+ if ((cur = tb[IFACE_ATTR_IP6WEIGHT]))
+ iface->assignment_weight = blobmsg_get_u32(cur);
+
+ if ((cur = tb[IFACE_ATTR_IP4TABLE])) {
+ if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip4table))
+ DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
+ }
+
+ if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
+ if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
+ DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
+ }
+
+ iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
+
+ iface->config_autostart = iface->autostart;
+ return iface;
+}
+
+void interface_set_dynamic(struct interface *iface)
+{
+ iface->dynamic = true;
+ iface->autostart = true;
+ iface->node.version = -1; // Don't delete on reload
+}
+
+static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
+{
+ struct blob_attr *tb[IFACE_ATTR_MAX];
+ struct blob_attr *cur;
+
+ blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
+ blob_data(config), blob_len(config));
+
+ if (alias) {
+ if ((cur = tb[IFACE_ATTR_INTERFACE]))
+ iface->parent_ifname = blobmsg_data(cur);
+
+ if (!iface->parent_ifname)
+ return false;
+ } else {
+ if ((cur = tb[IFACE_ATTR_IFNAME]))
+ iface->ifname = blobmsg_data(cur);
}
- return NULL;
+
+ iface->config = config;
+ vlist_add(&interfaces, &iface->node, iface->name);
+ return true;
}
void
-interface_remove_link(struct interface *iface, struct device *llif)
+interface_add(struct interface *iface, struct blob_attr *config)
{
- struct device *dev = iface->main_dev.dev;
+ __interface_add(iface, config, false);
+}
- if (dev && dev->hotplug_ops) {
- dev->hotplug_ops->del(dev, llif);
+bool
+interface_add_alias(struct interface *iface, struct blob_attr *config)
+{
+ if (iface->proto_handler->flags & PROTO_FLAG_NODEV)
+ return false;
+
+ return __interface_add(iface, config, true);
+}
+
+void
+interface_set_l3_dev(struct interface *iface, struct device *dev)
+{
+ bool enabled = iface->config_ip.enabled;
+ bool claimed = iface->l3_dev.claimed;
+
+ if (iface->l3_dev.dev == dev)
return;
+
+ interface_ip_set_enabled(&iface->config_ip, false);
+ interface_ip_set_enabled(&iface->proto_ip, false);
+ interface_ip_flush(&iface->proto_ip);
+ device_add_user(&iface->l3_dev, dev);
+
+ if (dev) {
+ if (claimed) {
+ if (device_claim(&iface->l3_dev) < 0)
+ return;
+ }
+ interface_ip_set_enabled(&iface->config_ip, enabled);
+ interface_ip_set_enabled(&iface->proto_ip, enabled);
}
+}
+
+void
+interface_set_main_dev(struct interface *iface, struct device *dev)
+{
+ bool claimed = iface->l3_dev.claimed;
- remove_device_user(&iface->main_dev);
+ if (iface->main_dev.dev == dev)
+ return;
+
+ interface_set_available(iface, false);
+ device_add_user(&iface->main_dev, dev);
+ if (!dev) {
+ interface_set_link_state(iface, false);
+ return;
+ }
+
+ if (claimed) {
+ if (device_claim(&iface->l3_dev) < 0)
+ return;
+ }
+
+ if (!iface->l3_dev.dev)
+ interface_set_l3_dev(iface, dev);
}
int
-interface_add_link(struct interface *iface, struct device *llif)
+interface_remove_link(struct interface *iface, struct device *dev)
{
- struct device *dev = iface->main_dev.dev;
+ struct device *mdev = iface->main_dev.dev;
+
+ if (mdev && mdev->hotplug_ops)
+ return mdev->hotplug_ops->del(mdev, dev);
- if (dev && dev->hotplug_ops)
- return dev->hotplug_ops->add(dev, llif);
+ if (dev == iface->ext_dev.dev)
+ device_remove_user(&iface->ext_dev);
- if (iface->main_dev.dev)
- interface_remove_link(iface, NULL);
+ if (!iface->main_dev.hotplug)
+ return UBUS_STATUS_INVALID_ARGUMENT;
- add_device_user(&iface->main_dev, llif);
+ if (dev != iface->main_dev.dev)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+ interface_set_main_dev(iface, NULL);
return 0;
}
+static int
+interface_add_link(struct interface *iface, struct device *dev, bool link_ext)
+{
+ struct device *mdev = iface->main_dev.dev;
+
+ if (mdev == dev)
+ return 0;
+
+ if (iface->main_dev.hotplug)
+ device_remove_user(&iface->main_dev);
+
+ if (mdev) {
+ if (mdev->hotplug_ops)
+ return mdev->hotplug_ops->add(mdev, dev);
+ else
+ return UBUS_STATUS_NOT_SUPPORTED;
+ }
+
+ if (link_ext)
+ device_add_user(&iface->ext_dev, dev);
+
+ interface_set_main_dev(iface, dev);
+ iface->main_dev.hotplug = true;
+ return 0;
+}
+
+int
+interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext)
+{
+ struct device *dev;
+ int ret;
+
+ device_lock();
+
+ dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
+ if (!dev) {
+ ret = UBUS_STATUS_NOT_FOUND;
+ goto out;
+ }
+
+ if (add) {
+ interface_set_device_config(iface, dev);
+ device_set_present(dev, true);
+
+ ret = interface_add_link(iface, dev, link_ext);
+ } else {
+ ret = interface_remove_link(iface, dev);
+ }
+
+out:
+ device_unlock();
+
+ return ret;
+}
+
int
-set_interface_up(struct interface *iface)
+interface_set_up(struct interface *iface)
{
+ int ret;
+
iface->autostart = true;
- if (!iface->active) {
+ if (iface->state != IFS_DOWN)
+ return 0;
+
+ interface_clear_errors(iface);
+ if (!iface->available) {
interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
return -1;
}
- if (iface->up || !iface->active)
- return -1;
+ if (iface->main_dev.dev) {
+ ret = device_claim(&iface->main_dev);
+ if (!ret)
+ interface_check_state(iface);
+ }
+ else
+ ret = __interface_set_up(iface);
- __set_interface_up(iface);
- return 0;
+ return ret;
}
int
-set_interface_down(struct interface *iface)
+interface_set_down(struct interface *iface)
{
- iface->autostart = false;
- __set_interface_down(iface);
+ if (!iface) {
+ vlist_for_each_element(&interfaces, iface, node)
+ __interface_set_down(iface, false);
+ } else {
+ iface->autostart = false;
+ __interface_set_down(iface, false);
+ }
return 0;
}
+
+int
+interface_renew(struct interface *iface)
+{
+ if (iface->state == IFS_TEARDOWN || iface->state == IFS_DOWN)
+ return -1;
+
+ return interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
+}
+
+void
+interface_start_pending(void)
+{
+ struct interface *iface;
+
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->available && iface->autostart)
+ interface_set_up(iface);
+ }
+}
+
+static void
+set_config_state(struct interface *iface, enum interface_config_state s)
+{
+ iface->config_state = s;
+ if (iface->state == IFS_DOWN)
+ interface_handle_config_change(iface);
+ else
+ __interface_set_down(iface, false);
+}
+
+void
+interface_update_start(struct interface *iface, const bool keep_old)
+{
+ iface->updated = 0;
+
+ if (!keep_old)
+ interface_ip_update_start(&iface->proto_ip);
+}
+
+void
+interface_update_complete(struct interface *iface)
+{
+ interface_ip_update_complete(&iface->proto_ip);
+}
+
+static void
+interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
+{
+ vlist_simple_replace(&new->dns_servers, &old->dns_servers);
+ vlist_simple_replace(&new->dns_search, &old->dns_search);
+}
+
+static bool
+interface_device_config_changed(struct interface *if_old, struct interface *if_new)
+{
+ struct blob_attr *ntb[__DEV_ATTR_MAX];
+ struct blob_attr *otb[__DEV_ATTR_MAX];
+ struct device *dev = if_old->main_dev.dev;
+ unsigned long diff = 0;
+
+ BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
+
+ if (!dev)
+ return false;
+
+ if (if_old->device_config != if_new->device_config)
+ return true;
+
+ if (!if_new->device_config)
+ return false;
+
+ blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
+ blob_data(if_old->config), blob_len(if_old->config));
+
+ blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
+ blob_data(if_new->config), blob_len(if_new->config));
+
+ uci_blob_diff(ntb, otb, &device_attr_list, &diff);
+ return diff;
+}
+
+static void
+interface_change_config(struct interface *if_old, struct interface *if_new)
+{
+ struct blob_attr *old_config = if_old->config;
+ bool reload = false, reload_ip = false;
+
+#define FIELD_CHANGED_STR(field) \
+ ((!!if_old->field != !!if_new->field) || \
+ (if_old->field && \
+ strcmp(if_old->field, if_new->field) != 0))
+
+ if (FIELD_CHANGED_STR(parent_ifname)) {
+ if (if_old->parent_iface.iface)
+ interface_remove_user(&if_old->parent_iface);
+ reload = true;
+ }
+
+ if (!reload && interface_device_config_changed(if_old, if_new))
+ reload = true;
+
+ if (FIELD_CHANGED_STR(ifname) ||
+ if_old->proto_handler != if_new->proto_handler)
+ reload = true;
+
+ if (!if_old->proto_handler->config_params)
+ D(INTERFACE, "No config parameters for interface '%s'\n",
+ if_old->name);
+ else if (!uci_blob_check_equal(if_old->config, if_new->config,
+ if_old->proto_handler->config_params))
+ reload = true;
+
+#define UPDATE(field, __var) ({ \
+ bool __changed = (if_old->field != if_new->field); \
+ if_old->field = if_new->field; \
+ __var |= __changed; \
+ })
+
+ if_old->config = if_new->config;
+ if (if_old->config_autostart != if_new->config_autostart) {
+ if (if_old->config_autostart)
+ reload = true;
+
+ if_old->autostart = if_new->config_autostart;
+ }
+
+ if_old->device_config = if_new->device_config;
+ if_old->config_autostart = if_new->config_autostart;
+ if_old->ifname = if_new->ifname;
+ if_old->parent_ifname = if_new->parent_ifname;
+ if_old->proto_handler = if_new->proto_handler;
+ if_old->force_link = if_new->force_link;
+ if_old->dns_metric = if_new->dns_metric;
+
+ if_old->proto_ip.no_dns = if_new->proto_ip.no_dns;
+ interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
+
+ UPDATE(metric, reload_ip);
+ UPDATE(proto_ip.no_defaultroute, reload_ip);
+ UPDATE(ip4table, reload_ip);
+ UPDATE(ip6table, reload_ip);
+ interface_merge_assignment_data(if_old, if_new);
+
+#undef UPDATE
+
+ if (reload) {
+ D(INTERFACE, "Reload interface '%s' because of config changes\n",
+ if_old->name);
+ interface_clear_errors(if_old);
+ set_config_state(if_old, IFC_RELOAD);
+ goto out;
+ }
+
+ if (reload_ip) {
+ bool config_ip_enabled = if_old->config_ip.enabled;
+ bool proto_ip_enabled = if_old->proto_ip.enabled;
+
+ interface_ip_set_enabled(&if_old->config_ip, false);
+ interface_ip_set_enabled(&if_old->proto_ip, false);
+ interface_ip_set_enabled(&if_old->proto_ip, proto_ip_enabled);
+ interface_ip_set_enabled(&if_old->config_ip, config_ip_enabled);
+ }
+
+ interface_write_resolv_conf();
+ if (if_old->main_dev.dev)
+ interface_check_state(if_old);
+
+out:
+ if_new->config = NULL;
+ interface_cleanup(if_new);
+ free(old_config);
+ free(if_new);
+}
+
+static void
+interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct interface *if_old = container_of(node_old, struct interface, node);
+ struct interface *if_new = container_of(node_new, struct interface, node);
+
+ if (node_old && node_new) {
+ D(INTERFACE, "Update interface '%s'\n", if_new->name);
+ interface_change_config(if_old, if_new);
+ } else if (node_old) {
+ D(INTERFACE, "Remove interface '%s'\n", if_old->name);
+ set_config_state(if_old, IFC_REMOVE);
+ } else if (node_new) {
+ D(INTERFACE, "Create interface '%s'\n", if_new->name);
+ proto_init_interface(if_new, if_new->config);
+ interface_claim_device(if_new);
+ netifd_ubus_add_interface(if_new);
+ }
+}
+
+
+static void __init
+interface_init_list(void)
+{
+ vlist_init(&interfaces, avl_strcmp, interface_update);
+ interfaces.keep_old = true;
+ interfaces.no_delete = true;
+}