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nl80211: Replace SIOCSIWSCAN with NL80211_CMD_TRIGGER_SCAN

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This is the first step in replacing WEXT-based scan with the new
nl80211-based mechanism.
This commit is contained in:
Jouni Malinen 2009-02-12 16:20:22 +02:00 committed by Jouni Malinen
parent b938903e41
commit 0e75527f7e
1 changed files with 28 additions and 21 deletions
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49
src/drivers/driver_nl80211.c
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@ -1495,38 +1495,42 @@ static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len) static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
{ {
struct wpa_driver_nl80211_data *drv = priv; struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0, timeout; int ret = 0, timeout;
struct iw_scan_req req; struct nl_msg *msg, *ssids;
if (ssid_len > IW_ESSID_MAX_SIZE) { msg = nlmsg_alloc();
wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)", ssids = nlmsg_alloc();
__FUNCTION__, (unsigned long) ssid_len); if (!msg || !ssids) {
nlmsg_free(msg);
nlmsg_free(ssids);
return -1; return -1;
} }
os_memset(&iwr, 0, sizeof(iwr)); genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); NL80211_CMD_TRIGGER_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (ssid && ssid_len) { if (ssid && ssid_len) {
os_memset(&req, 0, sizeof(req)); /* Request an active scan for a specific SSID */
req.essid_len = ssid_len; NLA_PUT(ssids, 1, ssid_len, ssid);
req.bssid.sa_family = ARPHRD_ETHER; } else {
os_memset(req.bssid.sa_data, 0xff, ETH_ALEN); /* Request an active scan for wildcard SSID */
os_memcpy(req.essid, ssid, ssid_len); NLA_PUT(ssids, 1, 0, "");
iwr.u.data.pointer = (caddr_t) &req;
iwr.u.data.length = sizeof(req);
iwr.u.data.flags = IW_SCAN_THIS_ESSID;
} }
nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) { ret = send_and_recv_msgs(drv, msg, NULL, NULL);
perror("ioctl[SIOCSIWSCAN]"); msg = NULL;
ret = -1; if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
} }
/* Not all drivers generate "scan completed" wireless event, so try to /* Not all drivers generate "scan completed" wireless event, so try to
* read results after a timeout. */ * read results after a timeout. */
timeout = 5; timeout = 10;
if (drv->scan_complete_events) { if (drv->scan_complete_events) {
/* /*
* The driver seems to deliver SIOCGIWSCAN events to notify * The driver seems to deliver SIOCGIWSCAN events to notify
@ -1538,9 +1542,12 @@ static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d " wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
"seconds", ret, timeout); "seconds", ret, timeout);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx); eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv, eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
drv->ctx); drv, drv->ctx);
nla_put_failure:
nlmsg_free(ssids);
nlmsg_free(msg);
return ret; return ret;
} }