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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
#include "ubus.h"
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 int
interface_event(struct interface *iface, enum interface_event ev)
{
if (!iface->state || !iface->state->event)
return 0;
return iface->state->event(iface->state, ev);
}
static void
__set_interface_up(struct interface *iface)
{
if (iface->up)
return;
if (claim_device(iface->main_dev.dev) < 0)
return;
if (interface_event(iface, IFEV_UP) < 0) {
release_device(iface->main_dev.dev);
return;
}
iface->up = true;
}
static void
__set_interface_down(struct interface *iface)
{
clear_interface_errors(iface);
if (!iface->up)
return;
iface->up = false;
interface_event(iface, IFEV_DOWN);
release_device(iface->main_dev.dev);
}
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);
}
struct interface *
alloc_interface(const char *name)
{
struct interface *iface;
iface = get_interface(name);
if (iface)
return iface;
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);
netifd_ubus_add_interface(iface);
return iface;
}
void
free_interface(struct interface *iface)
{
netifd_ubus_remove_interface(iface);
list_del(&iface->list);
if (iface->state && iface->state->free)
iface->state->free(iface->state);
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 *llif)
{
struct device *dev = iface->main_dev.dev;
if (dev && dev->hotplug_ops) {
dev->hotplug_ops->del(dev, llif);
return;
}
remove_device_user(&iface->main_dev);
}
int
interface_add_link(struct interface *iface, struct device *llif)
{
struct device *dev = iface->main_dev.dev;
if (dev && dev->hotplug_ops)
return dev->hotplug_ops->add(dev, llif);
if (iface->main_dev.dev)
interface_remove_link(iface, NULL);
add_device_user(&iface->main_dev, llif);
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->up)
return -1;
__set_interface_up(iface);
return 0;
}
int
set_interface_down(struct interface *iface)
{
iface->autostart = false;
__set_interface_down(iface);
return 0;
}
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