int vlan_remove_dynamic(struct hostapd_data *hapd, int vlan_id)
{
struct hostapd_vlan *vlan;
if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID)
return 1;
wpa_printf(MSG_DEBUG, "VLAN: %s(ifname=%s vlan_id=%d)",
__func__, hapd->conf->iface, vlan_id);
vlan = hapd->conf->vlan;
while (vlan) {
if (vlan->vlan_id == vlan_id && vlan->dynamic_vlan > 0) {
vlan->dynamic_vlan--;
break;
}
vlan = vlan->next;
}
if (vlan == NULL)
return 1;
if (vlan->dynamic_vlan == 0) {
vlan_if_remove(hapd, vlan);
#ifdef CONFIG_FULL_DYNAMIC_VLAN
vlan_dellink(vlan->ifname, hapd);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
}
return 0;
}
static void
vlan_read_ifnames(struct nlmsghdr *h, size_t len, int del,
struct hostapd_data *hapd)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr *attr;
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
char ifname[IFNAMSIZ + 1];
if (attr->rta_type == IFLA_IFNAME) {
int n = attr->rta_len - rta_len;
if (n < 0)
break;
os_memset(ifname, 0, sizeof(ifname));
if ((size_t) n > sizeof(ifname))
n = sizeof(ifname);
os_memcpy(ifname, ((char *) attr) + rta_len, n);
if (del)
vlan_dellink(ifname, hapd);
else
vlan_newlink(ifname, hapd);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void vlan_dynamic_remove(struct hostapd_data *hapd,
struct hostapd_vlan *vlan)
{
struct hostapd_vlan *next;
while (vlan) {
next = vlan->next;
if (vlan->vlan_id != VLAN_ID_WILDCARD &&
hapd->drv.vlan_if_remove(hapd, vlan->ifname)) {
printf("Could not remove VLAN iface: %s: %s\n",
vlan->ifname, strerror(errno));
}
#ifdef CONFIG_FULL_DYNAMIC_VLAN
if (vlan->clean)
vlan_dellink(vlan->ifname, hapd);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
vlan = next;
}
}
static void vlan_dynamic_remove(struct hostapd_data *hapd,
struct hostapd_vlan *vlan)
{
struct hostapd_vlan *next;
while (vlan) {
next = vlan->next;
#ifdef CONFIG_FULL_DYNAMIC_VLAN
/* vlan_dellink() takes care of cleanup and interface removal */
if (vlan->vlan_id != VLAN_ID_WILDCARD)
vlan_dellink(vlan->ifname, hapd);
#else /* CONFIG_FULL_DYNAMIC_VLAN */
if (vlan->vlan_id != VLAN_ID_WILDCARD &&
vlan_if_remove(hapd, vlan)) {
wpa_printf(MSG_ERROR, "VLAN: Could not remove VLAN "
"iface: %s: %s",
vlan->ifname, strerror(errno));
}
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
vlan = next;
}
}
static void
vlan_read_ifnames(struct nlmsghdr *h, size_t len, int del,
struct hostapd_data *hapd)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr *attr;
char ifname[IFNAMSIZ + 1];
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
os_memset(ifname, 0, sizeof(ifname));
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
int n = attr->rta_len - rta_len;
if (n < 0)
break;
if ((size_t) n >= sizeof(ifname))
n = sizeof(ifname) - 1;
os_memcpy(ifname, ((char *) attr) + rta_len, n);
}
attr = RTA_NEXT(attr, attrlen);
}
if (!ifname[0])
return;
if (del && if_nametoindex(ifname)) {
/* interface still exists, race condition ->
* iface has just been recreated */
return;
}
wpa_printf(MSG_DEBUG,
"VLAN: RTM_%sLINK: ifi_index=%d ifname=%s ifi_family=%d ifi_flags=0x%x (%s%s%s%s)",
del ? "DEL" : "NEW",
ifi->ifi_index, ifname, ifi->ifi_family, ifi->ifi_flags,
(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
(ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
if (del)
vlan_dellink(ifname, hapd);
else
vlan_newlink(ifname, hapd);
}