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interface.c
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interface.c
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/*
* 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"
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_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_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_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 },
};
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
interface_event(struct interface *iface, enum interface_event ev);
static void
interface_error_flush(struct interface *iface)
{
struct interface_error *error, *tmp;
list_for_each_entry_safe(error, tmp, &iface->errors, list) {
list_del(&error->list);
free(error);
}
}
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 = 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 *);
datalen = alloca(len);
for (i = 0; i < n_data; i++) {
datalen[i] = strlen(data[i]) + 1;
len += datalen[i];
}
}
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);
dest = (char *) &error->data[n_data + 1];
for (i = 0; i < n_data; i++) {
error->data[i] = dest;
memcpy(dest, data[i], datalen[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 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);
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)
{
struct interface_user *dep, *tmp;
struct device *adev = NULL;
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:
alias_notify_device(iface->name, adev);
break;
default:
break;
}
}
static void
interface_flush_state(struct interface *iface)
{
if (iface->l3_dev.dev)
device_release(&iface->l3_dev);
interface_data_flush(iface);
}
static void
mark_interface_down(struct interface *iface)
{
enum interface_state state = iface->state;
if (state == IFS_DOWN)
return;
iface->state = IFS_DOWN;
if (state == IFS_UP)
interface_event(iface, IFEV_DOWN);
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;
}
}
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
interface_check_state(struct interface *iface)
{
bool link_state = iface->link_state || iface->force_link;
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;
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_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);
}
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 = false;
iface = container_of(dep, struct interface, main_dev);
switch (ev) {
case DEV_EVENT_ADD:
new_state = true;
case DEV_EVENT_REMOVE:
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:
interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
break;
default:
break;
}
}
void
interface_set_available(struct interface *iface, bool new_state)
{
if (iface->available == new_state)
return;
D(INTERFACE, "Interface '%s', available=%d\n", iface->name, new_state);
iface->available = new_state;
if (new_state) {
if (iface->autostart && !config_init)
interface_set_up(iface);
} else
__interface_set_down(iface, true);
}
void
interface_add_user(struct interface_user *dep, struct interface *iface)
{
if (!iface) {
list_add(&dep->list, &iface_all_users);
return;
}
dep->iface = iface;
list_add(&dep->list, &iface->users);
if (iface->state == IFS_UP)
dep->cb(dep, iface, IFEV_UP);
}
void
interface_remove_user(struct interface_user *dep)
{
list_del_init(&dep->list);
dep->iface = NULL;
}
static void
interface_add_assignment_classes(struct interface *iface, struct blob_attr *list)
{
struct blob_attr *cur;
int rem;
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);
}
}
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_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;
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:
interface_set_available(alias, false);
interface_set_main_dev(alias, NULL);
break;
case IFEV_FREE:
interface_remove_user(dep);
break;
case IFEV_RELOAD:
case IFEV_UPDATE:
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);
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);
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);
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) {
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 *
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);
if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
interface_add_dns_search_list(&iface->config_ip, 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_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);
}
iface->config = config;
vlist_add(&interfaces, &iface->node, iface->name);
return true;
}
void
interface_add(struct interface *iface, struct blob_attr *config)
{
__interface_add(iface, config, false);
}
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;
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_remove_link(struct interface *iface, struct device *dev)
{
struct device *mdev = iface->main_dev.dev;
if (mdev && mdev->hotplug_ops)
return mdev->hotplug_ops->del(mdev, dev);
if (dev == iface->ext_dev.dev)
device_remove_user(&iface->ext_dev);
if (!iface->main_dev.hotplug)
return UBUS_STATUS_INVALID_ARGUMENT;
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);