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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
#include "system.h"
struct vlan_device {
struct device dev;
struct device_user dep;
device_state_cb set_state;
int id;
};
static void free_vlan_if(struct device *iface)
{
struct vlan_device *vldev;
vldev = container_of(iface, struct vlan_device, dev);
remove_device_user(&vldev->dep);
cleanup_device(&vldev->dev);
free(vldev);
}
static int vlan_set_device_state(struct device *dev, bool up)
{
struct vlan_device *vldev;
int ret = 0;
vldev = container_of(dev, struct vlan_device, dev);
if (!up) {
vldev->set_state(dev, false);
system_vlan_del(dev);
release_device(vldev->dep.dev);
return 0;
}
ret = claim_device(vldev->dep.dev);
if (ret)
return ret;
system_vlan_add(vldev->dep.dev, vldev->id);
ret = vldev->set_state(dev, true);
if (ret)
release_device(vldev->dep.dev);
return ret;
}
static void vlan_dev_cb(struct device_user *dep, enum device_event ev)
{
struct vlan_device *vldev;
vldev = container_of(dep, struct vlan_device, dep);
switch(ev) {
case DEV_EVENT_ADD:
set_device_present(&vldev->dev, true);
break;
case DEV_EVENT_REMOVE:
set_device_present(&vldev->dev, false);
break;
default:
break;
}
}
static struct device *get_vlan_device(struct device *dev, int id, bool create)
{
static const struct device_type vlan_type = {
.name = "VLAN",
.free = free_vlan_if,
};
struct vlan_device *vldev;
struct device_user *dep;
/* look for an existing interface before creating a new one */
list_for_each_entry(dep, &dev->users, list) {
if (dep->cb != vlan_dev_cb)
continue;
vldev = container_of(dep, struct vlan_device, dep);
if (vldev->id != id)
continue;
return &vldev->dev;
}
if (!create)
return NULL;
vldev = calloc(1, sizeof(*vldev));
snprintf(vldev->dev.ifname, IFNAMSIZ, "%s.%d", dev->ifname, id);
init_device(&vldev->dev, &vlan_type, NULL);
vldev->set_state = vldev->dev.set_state;
vldev->dev.set_state = vlan_set_device_state;
vldev->id = id;
vldev->dep.cb = vlan_dev_cb;
add_device_user(&vldev->dep, dev);
return &vldev->dev;
}
static char *split_vlan(char *s)
{
s = strchr(s, '.');
if (!s)
goto out;
*s = 0;
s++;
out:
return s;
}
struct device *get_vlan_device_chain(const char *ifname, bool create)
{
struct device *iface = NULL;
char *buf, *s, *next, *err = NULL;
int id;
buf = strdup(ifname);
if (!buf)
return NULL;
s = split_vlan(buf);
iface = get_device(buf, create);
if (!iface && !create)
goto error;
do {
next = split_vlan(s);
id = strtoul(s, &err, 10);
if (err && *err)
goto error;
iface = get_vlan_device(iface, id, create);
if (!iface)
goto error;
s = next;
if (!s)
goto out;
} while (1);
error:
iface = NULL;
out:
free(buf);
return iface;
}
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