/*
* hostapd / VLAN initialization
* Copyright 2003, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#ifdef CONFIG_FULL_DYNAMIC_VLAN
#include <net/if.h>
#include <sys/ioctl.h>
#include <linux/sockios.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
#include "utils/common.h"
#include "hostapd.h"
#include "ap_config.h"
#include "ap_drv_ops.h"
#include "vlan_init.h"
#include "vlan_util.h"
#ifdef CONFIG_FULL_DYNAMIC_VLAN
#include "drivers/priv_netlink.h"
#include "utils/eloop.h"
struct full_dynamic_vlan {
int s; /* socket on which to listen for new/removed interfaces. */
};
#define DVLAN_CLEAN_BR 0x1
#define DVLAN_CLEAN_VLAN 0x2
#define DVLAN_CLEAN_VLAN_PORT 0x4
struct dynamic_iface {
char ifname[IFNAMSIZ + 1];
int usage;
int clean;
struct dynamic_iface *next;
};
/* Increment ref counter for ifname and add clean flag.
* If not in list, add it only if some flags are given.
*/
static void dyn_iface_get(struct hostapd_data *hapd, const char *ifname,
int clean)
{
struct dynamic_iface *next, **dynamic_ifaces;
struct hapd_interfaces *interfaces;
interfaces = hapd->iface->interfaces;
dynamic_ifaces = &interfaces->vlan_priv;
for (next = *dynamic_ifaces; next; next = next->next) {
if (os_strcmp(ifname, next->ifname) == 0)
break;
}
if (next) {
next->usage++;
next->clean |= clean;
return;
}
if (!clean)
return;
next = os_zalloc(sizeof(*next));
if (!next)
return;
os_strlcpy(next->ifname, ifname, sizeof(next->ifname));
next->usage = 1;
next->clean = clean;
next->next = *dynamic_ifaces;
*dynamic_ifaces = next;
}
/* Decrement reference counter for given ifname.
* Return clean flag iff reference counter was decreased to zero, else zero
*/
static int dyn_iface_put(struct hostapd_data *hapd, const char *ifname)
{
struct dynamic_iface *next, *prev = NULL, **dynamic_ifaces;
struct hapd_interfaces *interfaces;
int clean;
interfaces = hapd->iface->interfaces;
dynamic_ifaces = &interfaces->vlan_priv;
for (next = *dynamic_ifaces; next; next = next->next) {
if (os_strcmp(ifname, next->ifname) == 0)
break;
prev = next;
}
if (!next)
return 0;
next->usage--;
if (next->usage)
return 0;
if (prev)
prev->next = next->next;
else
*dynamic_ifaces = next->next;
clean = next->clean;
os_free(next);
return clean;
}
static int ifconfig_helper(const char *if_name, int up)
{
int fd;
struct ifreq ifr;
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCGIFFLAGS) failed "
"for interface %s: %s",
__func__, if_name, strerror(errno));
close(fd);
return -1;
}
if (up)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCSIFFLAGS) failed "
"for interface %s (up=%d): %s",
__func__, if_name, up, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
static int ifconfig_up(const char *if_name)
{
wpa_printf(MSG_DEBUG, "VLAN: Set interface %s up", if_name);
return ifconfig_helper(if_name, 1);
}
static int ifconfig_down(const char *if_name)
{
wpa_printf(MSG_DEBUG, "VLAN: Set interface %s down", if_name);
return ifconfig_helper(if_name, 0);
}
/*
* These are only available in recent linux headers (without the leading
* underscore).
*/
#define _GET_VLAN_REALDEV_NAME_CMD 8
#define _GET_VLAN_VID_CMD 9
/* This value should be 256 ONLY. If it is something else, then hostapd
* might crash!, as this value has been hard-coded in 2.4.x kernel
* bridging code.
*/
#define MAX_BR_PORTS 256
static int br_delif(const char *br_name, const char *if_name)
{
int fd;
struct ifreq ifr;
unsigned long args[2];
int if_index;
wpa_printf(MSG_DEBUG, "VLAN: br_delif(%s, %s)", br_name, if_name);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
if_index = if_nametoindex(if_name);
if (if_index == 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining "
"interface index for '%s'",
__func__, if_name);
close(fd);
return -1;
}
args[0] = BRCTL_DEL_IF;
args[1] = if_index;
os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
ifr.ifr_data = (__caddr_t) args;
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0 && errno != EINVAL) {
/* No error if interface already removed. */
wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE,"
"BRCTL_DEL_IF] failed for br_name=%s if_name=%s: "
"%s", __func__, br_name, if_name, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
/*
Add interface 'if_name' to the bridge 'br_name'
returns -1 on error
returns 1 if the interface is already part of the bridge
returns 0 otherwise
*/
static int br_addif(const char *br_name, const char *if_name)
{
int fd;
struct ifreq ifr;
unsigned long args[2];
int if_index;
wpa_printf(MSG_DEBUG, "VLAN: br_addif(%s, %s)", br_name, if_name);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
if_index = if_nametoindex(if_name);
if (if_index == 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining "
"interface index for '%s'",
__func__, if_name);
close(fd);
return -1;
}
args[0] = BRCTL_ADD_IF;
args[1] = if_index;
os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
ifr.ifr_data = (__caddr_t) args;
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) {
if (errno == EBUSY) {
/* The interface is already added. */
close(fd);
return 1;
}
wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE,"
"BRCTL_ADD_IF] failed for br_name=%s if_name=%s: "
"%s", __func__, br_name, if_name, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
static int br_delbr(const char *br_name)
{
int fd;
unsigned long arg[2];
wpa_printf(MSG_DEBUG, "VLAN: br_delbr(%s)", br_name);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
arg[0] = BRCTL_DEL_BRIDGE;
arg[1] = (unsigned long) br_name;
if (ioctl(fd, SIOCGIFBR, arg) < 0 && errno != ENXIO) {
/* No error if bridge already removed. */
wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_DEL_BRIDGE failed for "
"%s: %s", __func__, br_name, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
/*
Add a bridge with the name 'br_name'.
returns -1 on error
returns 1 if the bridge already exists
returns 0 otherwise
*/
static int br_addbr(const char *br_name)
{
int fd;
unsigned long arg[4];
struct ifreq ifr;
wpa_printf(MSG_DEBUG, "VLAN: br_addbr(%s)", br_name);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
arg[0] = BRCTL_ADD_BRIDGE;
arg[1] = (unsigned long) br_name;
if (ioctl(fd, SIOCGIFBR, arg) < 0) {
if (errno == EEXIST) {
/* The bridge is already added. */
close(fd);
return 1;
} else {
wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_ADD_BRIDGE "
"failed for %s: %s",
__func__, br_name, strerror(errno));
close(fd);
return -1;
}
}
/* Decrease forwarding delay to avoid EAPOL timeouts. */
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, br_name, IFNAMSIZ);
arg[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
arg[1] = 1;
arg[2] = 0;
arg[3] = 0;
ifr.ifr_data = (char *) &arg;
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: "
"BRCTL_SET_BRIDGE_FORWARD_DELAY (1 sec) failed for "
"%s: %s", __func__, br_name, strerror(errno));
/* Continue anyway */
}
close(fd);
return 0;
}
static int br_getnumports(const char *br_name)
{
int fd;
int i;
int port_cnt = 0;
unsigned long arg[4];
int ifindices[MAX_BR_PORTS];
struct ifreq ifr;
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
arg[0] = BRCTL_GET_PORT_LIST;
arg[1] = (unsigned long) ifindices;
arg[2] = MAX_BR_PORTS;
arg[3] = 0;
os_memset(ifindices, 0, sizeof(ifindices));
os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
ifr.ifr_data = (__caddr_t) arg;
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_GET_PORT_LIST "
"failed for %s: %s",
__func__, br_name, strerror(errno));
close(fd);
return -1;
}
for (i = 1; i < MAX_BR_PORTS; i++) {
if (ifindices[i] > 0) {
port_cnt++;
}
}
close(fd);
return port_cnt;
}
#ifndef CONFIG_VLAN_NETLINK
int vlan_rem(const char *if_name)
{
int fd;
struct vlan_ioctl_args if_request;
wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(%s)", if_name);
if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
if_name);
return -1;
}
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
os_memset(&if_request, 0, sizeof(if_request));
os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
if_request.cmd = DEL_VLAN_CMD;
if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: DEL_VLAN_CMD failed for %s: "
"%s", __func__, if_name, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
/*
Add a vlan interface with VLAN ID 'vid' and tagged interface
'if_name'.
returns -1 on error
returns 1 if the interface already exists
returns 0 otherwise
*/
int vlan_add(const char *if_name, int vid, const char *vlan_if_name)
{
int fd;
struct vlan_ioctl_args if_request;
wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d)",
if_name, vid);
ifconfig_up(if_name);
if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
if_name);
return -1;
}
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
os_memset(&if_request, 0, sizeof(if_request));
/* Determine if a suitable vlan device already exists. */
os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d",
vid);
if_request.cmd = _GET_VLAN_VID_CMD;
if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0) {
if (if_request.u.VID == vid) {
if_request.cmd = _GET_VLAN_REALDEV_NAME_CMD;
if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
os_strncmp(if_request.u.device2, if_name,
sizeof(if_request.u.device2)) == 0) {
close(fd);
wpa_printf(MSG_DEBUG, "VLAN: vlan_add: "
"if_name %s exists already",
if_request.device1);
return 1;
}
}
}
/* A suitable vlan device does not already exist, add one. */
os_memset(&if_request, 0, sizeof(if_request));
os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
if_request.u.VID = vid;
if_request.cmd = ADD_VLAN_CMD;
if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: ADD_VLAN_CMD failed for %s: "
"%s",
__func__, if_request.device1, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
static int vlan_set_name_type(unsigned int name_type)
{
int fd;
struct vlan_ioctl_args if_request;
wpa_printf(MSG_DEBUG, "VLAN: vlan_set_name_type(name_type=%u)",
name_type);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
"failed: %s", __func__, strerror(errno));
return -1;
}
os_memset(&if_request, 0, sizeof(if_request));
if_request.u.name_type = name_type;
if_request.cmd = SET_VLAN_NAME_TYPE_CMD;
if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: SET_VLAN_NAME_TYPE_CMD "
"name_type=%u failed: %s",
__func__, name_type, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
#endif /* CONFIG_VLAN_NETLINK */
static void vlan_newlink(char *ifname, struct hostapd_data *hapd)
{
char vlan_ifname[IFNAMSIZ];
char br_name[IFNAMSIZ];
struct hostapd_vlan *vlan = hapd->conf->vlan;
char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
int vlan_naming = hapd->conf->ssid.vlan_naming;
int clean;
wpa_printf(MSG_DEBUG, "VLAN: vlan_newlink(%s)", ifname);
while (vlan) {
if (os_strcmp(ifname, vlan->ifname) == 0 && !vlan->configured) {
vlan->configured = 1;
if (hapd->conf->vlan_bridge[0]) {
os_snprintf(br_name, sizeof(br_name), "%s%d",
hapd->conf->vlan_bridge,
vlan->vlan_id);
} else if (tagged_interface) {
os_snprintf(br_name, sizeof(br_name),
"br%s.%d", tagged_interface,
vlan->vlan_id);
} else {
os_snprintf(br_name, sizeof(br_name),
"brvlan%d", vlan->vlan_id);
}
dyn_iface_get(hapd, br_name,
br_addbr(br_name) ? 0 : DVLAN_CLEAN_BR);
ifconfig_up(br_name);
if (tagged_interface) {
if (vlan_naming ==
DYNAMIC_VLAN_NAMING_WITH_DEVICE)
os_snprintf(vlan_ifname,
sizeof(vlan_ifname),
"%s.%d", tagged_interface,
vlan->vlan_id);
else
os_snprintf(vlan_ifname,
sizeof(vlan_ifname),
"vlan%d", vlan->vlan_id);
clean = 0;
ifconfig_up(tagged_interface);
if (!vlan_add(tagged_interface, vlan->vlan_id,
vlan_ifname))
clean |= DVLAN_CLEAN_VLAN;
if (!br_addif(br_name, vlan_ifname))
clean |= DVLAN_CLEAN_VLAN_PORT;
dyn_iface_get(hapd, vlan_ifname, clean);
ifconfig_up(vlan_ifname);
}
if (!br_addif(br_name, ifname))
vlan->clean |= DVLAN_CLEAN_WLAN_PORT;
ifconfig_up(ifname);
break;
}
vlan = vlan->next;
}
}
static void vlan_dellink(char *ifname, struct hostapd_data *hapd)
{
char vlan_ifname[IFNAMSIZ];
char br_name[IFNAMSIZ];
struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan;
char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
int vlan_naming = hapd->conf->ssid.vlan_naming;
int clean;
wpa_printf(MSG_DEBUG, "VLAN: vlan_dellink(%s)", ifname);
first = prev = vlan;
while (vlan) {
if (os_strcmp(ifname, vlan->ifname) == 0 &&
vlan->configured) {
if (hapd->conf->vlan_bridge[0]) {
os_snprintf(br_name, sizeof(br_name), "%s%d",
hapd->conf->vlan_bridge,
vlan->vlan_id);
} else if (tagged_interface) {
os_snprintf(br_name, sizeof(br_name),
"br%s.%d", tagged_interface,
vlan->vlan_id);
} else {
os_snprintf(br_name, sizeof(br_name),
"brvlan%d", vlan->vlan_id);
}
if (vlan->clean & DVLAN_CLEAN_WLAN_PORT)
br_delif(br_name, vlan->ifname);
if (tagged_interface) {
if (vlan_naming ==
DYNAMIC_VLAN_NAMING_WITH_DEVICE)
os_snprintf(vlan_ifname,
sizeof(vlan_ifname),
"%s.%d", tagged_interface,
vlan->vlan_id);
else
os_snprintf(vlan_ifname,
sizeof(vlan_ifname),
"vlan%d", vlan->vlan_id);
clean = dyn_iface_put(hapd, vlan_ifname);
if (clean & DVLAN_CLEAN_VLAN_PORT)
br_delif(br_name, vlan_ifname);
if (clean & DVLAN_CLEAN_VLAN) {
ifconfig_down(vlan_ifname);
vlan_rem(vlan_ifname);
}
}
clean = dyn_iface_put(hapd, br_name);
if ((clean & DVLAN_CLEAN_BR) &&
br_getnumports(br_name) == 0) {
ifconfig_down(br_name);
br_delbr(br_name);
}
}
if (os_strcmp(ifname, vlan->ifname) == 0) {
if (vlan == first) {
hapd->conf->vlan = vlan->next;
} else {
prev->next = vlan->next;
}
os_free(vlan);
break;
}
prev = vlan;
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);
}
static void vlan_event_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
char buf[8192];
int left;
struct sockaddr_nl from;
socklen_t fromlen;
struct nlmsghdr *h;
struct hostapd_data *hapd = eloop_ctx;
fromlen = sizeof(from);
left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
(struct sockaddr *) &from, &fromlen);
if (left < 0) {
if (errno != EINTR && errno != EAGAIN)
wpa_printf(MSG_ERROR, "VLAN: %s: recvfrom failed: %s",
__func__, strerror(errno));
return;
}
h = (struct nlmsghdr *) buf;
while (NLMSG_OK(h, left)) {
int len, plen;
len = h->nlmsg_len;
plen = len - sizeof(*h);
if (len > left || plen < 0) {
wpa_printf(MSG_DEBUG, "VLAN: Malformed netlink "
"message: len=%d left=%d plen=%d",
len, left, plen);
break;
}
switch (h->nlmsg_type) {
case RTM_NEWLINK:
vlan_read_ifnames(h, plen, 0, hapd);
break;
case RTM_DELLINK:
vlan_read_ifnames(h, plen, 1, hapd);
break;
}
h = NLMSG_NEXT(h, left);
}
if (left > 0) {
wpa_printf(MSG_DEBUG, "VLAN: %s: %d extra bytes in the end of "
"netlink message", __func__, left);
}
}
static struct full_dynamic_vlan *
full_dynamic_vlan_init(struct hostapd_data *hapd)
{
struct sockaddr_nl local;
struct full_dynamic_vlan *priv;
priv = os_zalloc(sizeof(*priv));
if (priv == NULL)
return NULL;
#ifndef CONFIG_VLAN_NETLINK
vlan_set_name_type(hapd->conf->ssid.vlan_naming ==
DYNAMIC_VLAN_NAMING_WITH_DEVICE ?
VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD :
VLAN_NAME_TYPE_PLUS_VID_NO_PAD);
#endif /* CONFIG_VLAN_NETLINK */
priv->s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (priv->s < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: socket(PF_NETLINK,SOCK_RAW,"
"NETLINK_ROUTE) failed: %s",
__func__, strerror(errno));
os_free(priv);
return NULL;
}
os_memset(&local, 0, sizeof(local));
local.nl_family = AF_NETLINK;
local.nl_groups = RTMGRP_LINK;
if (bind(priv->s, (struct sockaddr *) &local, sizeof(local)) < 0) {
wpa_printf(MSG_ERROR, "VLAN: %s: bind(netlink) failed: %s",
__func__, strerror(errno));
close(priv->s);
os_free(priv);
return NULL;
}
if (eloop_register_read_sock(priv->s, vlan_event_receive, hapd, NULL))
{
close(priv->s);
os_free(priv);
return NULL;
}
return priv;
}
static void full_dynamic_vlan_deinit(struct full_dynamic_vlan *priv)
{
if (priv == NULL)
return;
eloop_unregister_read_sock(priv->s);
close(priv->s);
os_free(priv);
}
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
int vlan_setup_encryption_dyn(struct hostapd_data *hapd, const char *dyn_vlan)
{
int i;
if (dyn_vlan == NULL)
return 0;
/* Static WEP keys are set here; IEEE 802.1X and WPA uses their own
* functions for setting up dynamic broadcast keys. */
for (i = 0; i < 4; i++) {
if (hapd->conf->ssid.wep.key[i] &&
hostapd_drv_set_key(dyn_vlan, hapd, WPA_ALG_WEP, NULL, i,
i == hapd->conf->ssid.wep.idx, NULL, 0,
hapd->conf->ssid.wep.key[i],
hapd->conf->ssid.wep.len[i]))
{
wpa_printf(MSG_ERROR, "VLAN: Could not set WEP "
"encryption for dynamic VLAN");
return -1;
}
}
return 0;
}
static int vlan_dynamic_add(struct hostapd_data *hapd,
struct hostapd_vlan *vlan)
{
while (vlan) {
if (vlan->vlan_id != VLAN_ID_WILDCARD) {
if (hostapd_vlan_if_add(hapd, vlan->ifname)) {
if (errno != EEXIST) {
wpa_printf(MSG_ERROR, "VLAN: Could "
"not add VLAN %s: %s",
vlan->ifname,
strerror(errno));
return -1;
}
}
#ifdef CONFIG_FULL_DYNAMIC_VLAN
ifconfig_up(vlan->ifname);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
}
vlan = vlan->next;
}
return 0;
}
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 &&
hostapd_vlan_if_remove(hapd, vlan->ifname)) {
wpa_printf(MSG_ERROR, "VLAN: Could not remove VLAN "
"iface: %s: %s",
vlan->ifname, strerror(errno));
}
#ifdef CONFIG_FULL_DYNAMIC_VLAN
if (vlan->clean)
vlan_dellink(vlan->ifname, hapd);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
vlan = next;
}
}
int vlan_init(struct hostapd_data *hapd)
{
#ifdef CONFIG_FULL_DYNAMIC_VLAN
hapd->full_dynamic_vlan = full_dynamic_vlan_init(hapd);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED &&
!hapd->conf->vlan) {
/* dynamic vlans enabled but no (or empty) vlan_file given */
struct hostapd_vlan *vlan;
vlan = os_zalloc(sizeof(*vlan));
if (vlan == NULL) {
wpa_printf(MSG_ERROR, "Out of memory while assigning "
"VLAN interfaces");
return -1;
}
vlan->vlan_id = VLAN_ID_WILDCARD;
os_snprintf(vlan->ifname, sizeof(vlan->ifname), "%s.#",
hapd->conf->iface);
vlan->next = hapd->conf->vlan;
hapd->conf->vlan = vlan;
}
if (vlan_dynamic_add(hapd, hapd->conf->vlan))
return -1;
return 0;
}
void vlan_deinit(struct hostapd_data *hapd)
{
vlan_dynamic_remove(hapd, hapd->conf->vlan);
#ifdef CONFIG_FULL_DYNAMIC_VLAN
full_dynamic_vlan_deinit(hapd->full_dynamic_vlan);
hapd->full_dynamic_vlan = NULL;
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
}
struct hostapd_vlan * vlan_add_dynamic(struct hostapd_data *hapd,
struct hostapd_vlan *vlan,
int vlan_id)
{
struct hostapd_vlan *n = NULL;
char *ifname, *pos;
if (vlan == NULL || vlan_id <= 0 || vlan_id > MAX_VLAN_ID ||
vlan->vlan_id != VLAN_ID_WILDCARD)
return NULL;
wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d ifname=%s)",
__func__, vlan_id, vlan->ifname);
ifname = os_strdup(vlan->ifname);
if (ifname == NULL)
return NULL;
pos = os_strchr(ifname, '#');
if (pos == NULL)
goto free_ifname;
*pos++ = '\0';
n = os_zalloc(sizeof(*n));
if (n == NULL)
goto free_ifname;
n->vlan_id = vlan_id;
n->dynamic_vlan = 1;
os_snprintf(n->ifname, sizeof(n->ifname), "%s%d%s", ifname, vlan_id,
pos);
if (hostapd_vlan_if_add(hapd, n->ifname)) {
os_free(n);
n = NULL;
goto free_ifname;
}
n->next = hapd->conf->vlan;
hapd->conf->vlan = n;
#ifdef CONFIG_FULL_DYNAMIC_VLAN
ifconfig_up(n->ifname);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
free_ifname:
os_free(ifname);
return n;
}
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) {
hostapd_vlan_if_remove(hapd, vlan->ifname);
#ifdef CONFIG_FULL_DYNAMIC_VLAN
vlan_dellink(vlan->ifname, hapd);
#endif /* CONFIG_FULL_DYNAMIC_VLAN */
}
return 0;
}