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nl80211: Share common interface processing code

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This commit is contained in:
Jouni Malinen 2009-04-09 20:41:21 +03:00 committed by Jouni Malinen
parent 072ad14cc4
commit 2135f224db
1 changed files with 85 additions and 286 deletions
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365
src/drivers/driver_nl80211.c
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@ -166,6 +166,8 @@ static void handle_frame(struct wpa_driver_nl80211_data *drv,
u8 *buf, size_t len, u8 *buf, size_t len,
struct hostapd_frame_info *hfi, struct hostapd_frame_info *hfi,
enum ieee80211_msg_type msg_type); enum ieee80211_msg_type msg_type);
static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
#endif /* HOSTAPD */ #endif /* HOSTAPD */
@ -862,65 +864,43 @@ static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
} }
static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv, static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
const char *ifname, int *flags) const char *ifname, int dev_up)
{ {
struct ifreq ifr; struct ifreq ifr;
if (drv->ioctl_sock < 0)
return -1;
os_memset(&ifr, 0, sizeof(ifr)); os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCGIFFLAGS]"); perror("ioctl[SIOCGIFFLAGS]");
wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
ifname);
return -1; return -1;
} }
*flags = ifr.ifr_flags & 0xffff;
if (dev_up) {
if (ifr.ifr_flags & IFF_UP)
return 0; return 0;
ifr.ifr_flags |= IFF_UP;
} else {
if (!(ifr.ifr_flags & IFF_UP))
return 0;
ifr.ifr_flags &= ~IFF_UP;
} }
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
/** perror("ioctl[SIOCSIFFLAGS]");
* wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
* @drv: driver_nl80211 private data
* @flags: Pointer to returned flags value
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
int *flags)
{
return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
}
static int wpa_driver_nl80211_set_ifflags_ifname(
struct wpa_driver_nl80211_data *drv,
const char *ifname, int flags)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
ifr.ifr_flags = flags & 0xffff;
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
perror("SIOCSIFFLAGS");
return -1; return -1;
} }
return 0; return 0;
} }
/**
* wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
* @drv: driver_nl80211 private data
* @flags: New value for flags
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
int flags)
{
return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
}
/** /**
* wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
* @priv: driver_nl80211 private data * @priv: driver_nl80211 private data
@ -1172,8 +1152,6 @@ err1:
static int static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv) wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
{ {
int flags;
drv->ifindex = if_nametoindex(drv->ifname); drv->ifindex = if_nametoindex(drv->ifname);
if (wpa_driver_nl80211_set_mode(drv, 0) < 0) { if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
@ -1181,18 +1159,11 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
"use managed mode"); "use managed mode");
} }
if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) { if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
drv->ifname);
return -1;
}
if (!(flags & IFF_UP)) {
if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
wpa_printf(MSG_ERROR, "Could not set interface '%s' " wpa_printf(MSG_ERROR, "Could not set interface '%s' "
"UP", drv->ifname); "UP", drv->ifname);
return -1; return -1;
} }
}
wpa_driver_nl80211_capa(drv); wpa_driver_nl80211_capa(drv);
@ -1212,7 +1183,6 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
static void wpa_driver_nl80211_deinit(void *priv) static void wpa_driver_nl80211_deinit(void *priv)
{ {
struct wpa_driver_nl80211_data *drv = priv; struct wpa_driver_nl80211_data *drv = priv;
int flags;
#ifdef CONFIG_AP #ifdef CONFIG_AP
if (drv->monitor_ifidx >= 0) if (drv->monitor_ifidx >= 0)
@ -1231,8 +1201,7 @@ static void wpa_driver_nl80211_deinit(void *priv)
eloop_unregister_read_sock(drv->link_event_sock); eloop_unregister_read_sock(drv->link_event_sock);
if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) hostapd_set_iface_flags(drv, drv->ifname, 0);
(void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
wpa_driver_nl80211_set_mode(drv, 0); wpa_driver_nl80211_set_mode(drv, 0);
close(drv->link_event_sock); close(drv->link_event_sock);
@ -2149,12 +2118,20 @@ nla_put_failure:
return -1; return -1;
} }
#endif /* CONFIG_AP */
#if defined(CONFIG_AP) || defined(HOSTAPD)
static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
int ifidx) int ifidx)
{ {
struct nl_msg *msg; struct nl_msg *msg;
#ifdef HOSTAPD
/* stop listening for EAPOL on this interface */
del_ifidx(drv, ifidx);
#endif /* HOSTAPD */
msg = nlmsg_alloc(); msg = nlmsg_alloc();
if (!msg) if (!msg)
goto nla_put_failure; goto nla_put_failure;
@ -2172,11 +2149,16 @@ static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv, static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
const char *ifname, enum nl80211_iftype iftype) const char *ifname, enum nl80211_iftype iftype,
const u8 *addr)
{ {
struct nl_msg *msg, *flags = NULL; struct nl_msg *msg, *flags = NULL;
int ifidx; int ifidx;
int ret = -ENOBUFS; int ret = -ENOBUFS;
#ifdef HOSTAPD
struct ifreq ifreq;
struct iwreq iwr;
#endif /* HOSTAPD */
msg = nlmsg_alloc(); msg = nlmsg_alloc();
if (!msg) if (!msg)
@ -2218,9 +2200,43 @@ static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
if (ifidx <= 0) if (ifidx <= 0)
return -1; return -1;
#ifdef HOSTAPD
/* start listening for EAPOL on this interface */
add_ifidx(drv, ifidx);
if (addr) {
switch (iftype) {
case NL80211_IFTYPE_AP:
os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
break;
case NL80211_IFTYPE_WDS:
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.addr.sa_family = ARPHRD_ETHER;
memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
return -1;
break;
default:
/* nothing */
break;
}
}
#endif /* HOSTAPD */
return ifidx; return ifidx;
} }
#endif /* CONFIG_AP || HOSTAPD */
#ifdef CONFIG_AP
void ap_tx_status(void *ctx, const u8 *addr, void ap_tx_status(void *ctx, const u8 *addr,
const u8 *buf, size_t len, int ack); const u8 *buf, size_t len, int ack);
@ -2577,9 +2593,6 @@ static int add_monitor_filter(int s)
return 0; return 0;
} }
#endif /* CONFIG_AP || HOSTAPD */
#ifdef CONFIG_AP
static int static int
nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv) nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
@ -2588,31 +2601,18 @@ nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
struct sockaddr_ll ll; struct sockaddr_ll ll;
int optval; int optval;
socklen_t optlen; socklen_t optlen;
int flags;
snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname); snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
buf[IFNAMSIZ - 1] = '\0'; buf[IFNAMSIZ - 1] = '\0';
drv->monitor_ifidx = drv->monitor_ifidx =
nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR); nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
if (drv->monitor_ifidx < 0) if (drv->monitor_ifidx < 0)
return -1; return -1;
if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0) { if (hostapd_set_iface_flags(drv, buf, 1))
wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
buf);
goto error; goto error;
}
if (!(flags & IFF_UP)) {
if (wpa_driver_nl80211_set_ifflags_ifname(drv, buf,
flags | IFF_UP) != 0)
{
wpa_printf(MSG_ERROR, "Could not set interface '%s' "
"UP", buf);
goto error;
}
}
memset(&ll, 0, sizeof(ll)); memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET; ll.sll_family = AF_PACKET;
@ -2629,8 +2629,7 @@ nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
/* This works, but will cost in performance. */ /* This works, but will cost in performance. */
} }
if (bind(drv->monitor_sock, (struct sockaddr *) &ll, if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
sizeof(ll)) < 0) {
perror("monitor socket bind"); perror("monitor socket bind");
goto error; goto error;
} }
@ -2655,6 +2654,9 @@ nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
return -1; return -1;
} }
#endif /* CONFIG_AP || HOSTAPD */
#ifdef CONFIG_AP
static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv, static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
struct wpa_driver_associate_params *params) struct wpa_driver_associate_params *params)
@ -2755,7 +2757,7 @@ nla_put_failure:
static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv, static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
int mode) int mode)
{ {
int ret = -1, flags; int ret = -1;
struct nl_msg *msg; struct nl_msg *msg;
int nlmode; int nlmode;
@ -2798,9 +2800,7 @@ try_again:
* take the device down, try to set the mode again, and bring the * take the device down, try to set the mode again, and bring the
* device back up. * device back up.
*/ */
if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) { if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
(void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
/* Try to set the mode again while the interface is down */ /* Try to set the mode again while the interface is down */
msg = nlmsg_alloc(); msg = nlmsg_alloc();
if (!msg) if (!msg)
@ -2817,11 +2817,8 @@ try_again:
drv->ifname, ret, strerror(-ret)); drv->ifname, ret, strerror(-ret));
} }
/* Ignore return value of get_ifflags to ensure that the device if (hostapd_set_iface_flags(drv, drv->ifname, 1))
* is always up like it was before this function was called. ret = -1;
*/
(void) wpa_driver_nl80211_get_ifflags(drv, &flags);
(void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
} }
return ret; return ret;
@ -2934,38 +2931,6 @@ static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
} }
static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
const char *ifname, int dev_up)
{
struct ifreq ifr;
if (drv->ioctl_sock < 0)
return -1;
memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCGIFFLAGS]");
wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
drv->ifname);
return -1;
}
if (dev_up)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCSIFFLAGS]");
return -1;
}
return 0;
}
static int i802_set_key(const char *iface, void *priv, wpa_alg alg, static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
const u8 *addr, int key_idx, int set_tx, const u8 *seq, const u8 *addr, int key_idx, int set_tx, const u8 *seq,
size_t seq_len, const u8 *key, size_t key_len) size_t seq_len, const u8 *key, size_t key_len)
@ -3491,111 +3456,6 @@ static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
} }
static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx)
{
struct nl_msg *msg;
/* stop listening for EAPOL on this interface */
del_ifidx(drv, ifidx);
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
return;
nla_put_failure:
printf("Failed to remove interface.\n");
}
static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
const char *ifname,
enum nl80211_iftype iftype,
const u8 *addr)
{
struct nl_msg *msg, *flags = NULL;
int ifidx;
struct ifreq ifreq;
struct iwreq iwr;
int ret = -ENOBUFS;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
if (iftype == NL80211_IFTYPE_MONITOR) {
int err;
flags = nlmsg_alloc();
if (!flags)
goto nla_put_failure;
NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
nlmsg_free(flags);
if (err)
goto nla_put_failure;
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
nla_put_failure:
printf("Failed to create interface %s.\n", ifname);
return ret;
}
ifidx = if_nametoindex(ifname);
if (ifidx <= 0)
return -1;
/* start listening for EAPOL on this interface */
add_ifidx(drv, ifidx);
if (addr) {
switch (iftype) {
case NL80211_IFTYPE_AP:
os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
break;
case NL80211_IFTYPE_WDS:
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.addr.sa_family = ARPHRD_ETHER;
memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
return -1;
break;
default:
/* nothing */
break;
}
}
return ifidx;
}
static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid) static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
{ {
struct wpa_driver_nl80211_data *drv = priv; struct wpa_driver_nl80211_data *drv = priv;
@ -3983,67 +3843,6 @@ static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
} }
static int nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
{
char buf[IFNAMSIZ];
struct sockaddr_ll ll;
int optval;
socklen_t optlen;
snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
buf[IFNAMSIZ - 1] = '\0';
drv->monitor_ifidx =
nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
if (drv->monitor_ifidx < 0)
return -1;
if (hostapd_set_iface_flags(drv, buf, 1))
goto error;
memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET;
ll.sll_ifindex = drv->monitor_ifidx;
drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (drv->monitor_sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
goto error;
}
if (add_monitor_filter(drv->monitor_sock)) {
wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
"interface; do filtering in user space");
/* This works, but will cost in performance. */
}
if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
sizeof(ll)) < 0) {
perror("monitor socket bind");
goto error;
}
optlen = sizeof(optval);
optval = 20;
if (setsockopt
(drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
perror("Failed to set socket priority");
goto error;
}
if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
drv, NULL)) {
printf("Could not register monitor read socket\n");
goto error;
}
return 0;
error:
nl80211_remove_iface(drv, drv->monitor_ifidx);
return -1;
}
static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname, static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
int mode) int mode)
{ {