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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
#include "device.h"
#include "interface.h"
#include "proto.h"
#include "ubus.h"
static LIST_HEAD(interfaces);
static void
clear_interface_errors(struct interface *iface)
{
struct interface_error *error, *tmp;
list_for_each_entry_safe(error, tmp, &iface->errors, list) {
list_del(&error->list);
free(error);
}
}
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;
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(1, sizeof(*error) + sizeof(char *) + len);
if (!error)
return;
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++) {
error->data[i] = dest;
memcpy(dest, data[i], datalen[i]);
dest += datalen[i];
}
error->data[n_data] = NULL;
}
static void
interface_event(struct interface *iface, enum interface_event ev)
{
/* TODO */
}
static void
mark_interface_down(struct interface *iface)
{
release_device(iface->main_dev.dev);
iface->state = IFS_DOWN;
}
static int
__set_interface_up(struct interface *iface)
{
int ret;
if (iface->state != IFS_DOWN)
return 0;
ret = claim_device(iface->main_dev.dev);
if (ret)
return ret;
iface->state = IFS_SETUP;
ret = interface_proto_event(iface->proto, PROTO_CMD_SETUP, false);
if (ret) {
mark_interface_down(iface);
return ret;
}
return 0;
}
static void
__set_interface_down(struct interface *iface, bool force)
{
clear_interface_errors(iface);
if (iface->state == IFS_DOWN ||
iface->state == IFS_TEARDOWN)
return;
iface->state = IFS_TEARDOWN;
interface_event(iface, IFEV_DOWN);
interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
}
static void
interface_cb(struct device_user *dep, enum device_event ev)
{
struct interface *iface;
bool new_state;
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;
break;
default:
return;
}
if (iface->active == new_state)
return;
iface->active = new_state;
if (new_state) {
if (iface->autostart)
set_interface_up(iface);
} else
__set_interface_down(iface, true);
}
static void
interface_proto_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)
return;
iface->state = IFS_UP;
interface_event(iface, IFEV_UP);
break;
case IFPEV_DOWN:
if (iface->state == IFS_DOWN)
return;
mark_interface_down(iface);
break;
}
}
void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
{
if (iface->proto) {
interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, true);
iface->proto->free(iface->proto);
iface->proto = NULL;
}
iface->state = IFS_DOWN;
iface->proto = state;
if (!state)
return;
state->proto_event = interface_proto_cb;
state->iface = iface;
}
struct interface *
alloc_interface(const char *name)
{
struct interface *iface;
iface = get_interface(name);
if (iface)
return iface;
iface = calloc(1, sizeof(*iface));
interface_set_proto_state(iface, get_default_proto());
if (!iface->proto) {
free(iface);
return NULL;
}
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);
netifd_ubus_add_interface(iface);
return iface;
}
void
free_interface(struct interface *iface)
{
netifd_ubus_remove_interface(iface);
list_del(&iface->list);
if (iface->proto->free)
iface->proto->free(iface->proto);
free(iface);
}
struct interface *
get_interface(const char *name)
{
struct interface *iface;
list_for_each_entry(iface, &interfaces, list) {
if (!strcmp(iface->name, name))
return iface;
}
return NULL;
}
void
interface_remove_link(struct interface *iface, struct device *dev)
{
struct device *mdev = iface->main_dev.dev;
if (mdev && mdev->hotplug_ops) {
mdev->hotplug_ops->del(mdev, dev);
return;
}
remove_device_user(&iface->main_dev);
}
int
interface_add_link(struct interface *iface, struct device *dev)
{
struct device *mdev = iface->main_dev.dev;
if (mdev && mdev->hotplug_ops)
return mdev->hotplug_ops->add(mdev, dev);
if (iface->main_dev.dev)
interface_remove_link(iface, NULL);
add_device_user(&iface->main_dev, dev);
return 0;
}
int
set_interface_up(struct interface *iface)
{
iface->autostart = true;
if (!iface->active) {
interface_add_error(iface, "interface", "NO_DEVICE", NULL, 0);
return -1;
}
if (iface->state != IFS_DOWN)
return 0;
return __set_interface_up(iface);
}
int
set_interface_down(struct interface *iface)
{
iface->autostart = false;
__set_interface_down(iface, false);
return 0;
}
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