RFC/PATCH: Allow wpa_supplicant to share scan results.
Ben Greear
greearb
Tue Nov 16 12:39:59 PST 2010
Please let me know if this is moving in the right direction. The
ath9k crash actually killed my file-system, so still re-installing
the OS on my test box... This code is un-tested, but it does compile.
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index aef8554..0f81b41 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -718,6 +718,11 @@ struct wpa_driver_ops {
*/
int (*get_ssid)(void *priv, u8 *ssid);
+ /** Return the physical radio name for this device, if known.
+ * The returned data must not be modified by the caller.
+ */
+ const char* (*get_radio_name)(void *priv);
+
/**
* set_key - Configure encryption key
* @ifname: Interface name (for multi-SSID/VLAN support)
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index 51bf446..ec9b0be 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -18,6 +18,9 @@
#include "includes.h"
#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
@@ -27,6 +30,7 @@
#include <linux/filter.h>
#include "nl80211_copy.h"
+
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_defs.h"
@@ -104,6 +108,7 @@ struct i802_bss {
struct i802_bss *next;
int ifindex;
char ifname[IFNAMSIZ + 1];
+ char phyname[32];
unsigned int beacon_set:1;
};
@@ -364,6 +369,12 @@ static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
return drv->ssid_len;
}
+static const char *wpa_driver_nl80211_get_radio_name(void *priv)
+{
+ struct i802_bss *bss = priv;
+ return bss->phyname;
+}
+
static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
char *buf, size_t len, int del)
@@ -1673,6 +1684,29 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
return NULL;
}
+ /* Find phy this interface belongs to. */
+ {
+ char buf[90];
+ int f;
+ int rv;
+
+ bss->phyname[0] = 0;
+ snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name", ifname);
+ f = open(buf, O_RDONLY);
+ if (f < 0)
+ wpa_printf(MSG_DEBUG, "Could not open file: %s, error: %s",
+ buf, strerror(errno));
+ else {
+ rv = read(f, bss->phyname, sizeof(bss->phyname) - 1);
+ close(f);
+ if (rv < 0)
+ wpa_printf(MSG_DEBUG, "Could not read file: %s error: %s",
+ buf, strerror(errno));
+ else
+ bss->phyname[rv] = 0;
+ }
+ }
+
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket(PF_INET,SOCK_DGRAM)");
@@ -5952,6 +5986,7 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.desc = "Linux nl80211/cfg80211",
.get_bssid = wpa_driver_nl80211_get_bssid,
.get_ssid = wpa_driver_nl80211_get_ssid,
+ .get_radio_name = wpa_driver_nl80211_get_radio_name,
.set_key = wpa_driver_nl80211_set_key,
.scan2 = wpa_driver_nl80211_scan,
.get_scan_results2 = wpa_driver_nl80211_get_scan_results,
diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index 39ac33b..d7d2227 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -44,7 +44,6 @@
#include "mlme.h"
#include "scan.h"
-
static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid, *old_ssid;
@@ -810,8 +809,7 @@ static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
return 1;
}
-
-static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
+static void _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_bss *selected;
@@ -851,7 +849,7 @@ static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
return;
}
- wpa_printf(MSG_DEBUG, "New scan results available");
+ wpa_printf(MSG_DEBUG, "%s: New scan results available", wpa_s->ifname);
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpas_notify_scan_results(wpa_s);
@@ -910,6 +908,46 @@ static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
}
}
}
+
+static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
+ union wpa_event_data *data)
+{
+ const char* rn = NULL;
+ _wpa_supplicant_event_scan_results(wpa_s, data);
+
+ if (wpa_s->driver->get_radio_name) {
+ rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
+ }
+
+ if (rn && rn[0]) {
+ struct wpa_supplicant *ifs;
+ wpa_printf(MSG_DEBUG, "%s: Checking for peer VIFS in event_scan_results.\n",
+ wpa_s->ifname);
+
+ /* Ok, we know our phy...now check other interfaces
+ * to see if they have the same phy. If so, they get
+ * updated with this same scan info.
+ */
+ ifs = wpa_s->global->ifaces;
+ while (ifs) {
+ if ((ifs == wpa_s) ||
+ !ifs->driver->get_radio_name)
+ ifs = ifs->next;
+ else {
+ const char* rn2;
+ rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
+ if (rn2 && (strcmp(rn, rn2) == 0)) {
+ wpa_printf(MSG_DEBUG, "%s: Updating scan results from peer.",
+ ifs->ifname);
+ /* Got a winner! */
+ _wpa_supplicant_event_scan_results(ifs, data);
+ }
+ ifs = ifs->next;
+ }
+ }
+ }
+}
+
#endif /* CONFIG_NO_SCAN_PROCESSING */
diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
index 0a603af..64f0ef5 100644
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -530,8 +530,8 @@ void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
{
enum wpa_states old_state = wpa_s->wpa_state;
- wpa_printf(MSG_DEBUG, "State: %s -> %s",
- wpa_supplicant_state_txt(wpa_s->wpa_state),
+ wpa_printf(MSG_DEBUG, "%s: State: %s -> %s",
+ wpa_s->ifname, wpa_supplicant_state_txt(wpa_s->wpa_state),
wpa_supplicant_state_txt(state));
if (state != WPA_SCANNING)
--
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc http://www.candelatech.com
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