From f952079a19c69843f4da2f7e0da008192421c6ce Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Tue, 23 Aug 2011 18:34:44 +0300 Subject: [PATCH] wl12xx: add support for multiple SSIDs in sched_scan The wl12xx firmwares support multiple SSIDs in a single sched_scan run. This patch implements support for it. We use three different types os sched_scan: FILTER_ANY (ie. not filtering, only wildcard SSID in the probe_reqs); FILTER_LIST (ie. send out probe_reqs with the specified SSIDs and only report if they are found); and FILTER_DISABLED (ie. send out probe_reqs with the specified SSIDs, but report anything found). Since we still don't have proper filter support in nl80211/cfg80211 yet, we cannot use filters when the wildcard SSID is used. Thus, we will not filter anything if the wildcard SSID is specified. Signed-off-by: Luciano Coelho --- drivers/net/wireless/wl12xx/main.c | 1 + drivers/net/wireless/wl12xx/scan.c | 63 ++++++++++++++++++++++++++---- 2 files changed, 57 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c index 0f72af9fc267..bde84027ab7f 100644 --- a/drivers/net/wireless/wl12xx/main.c +++ b/drivers/net/wireless/wl12xx/main.c @@ -4491,6 +4491,7 @@ int wl1271_init_ieee80211(struct wl1271 *wl) wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP); wl->hw->wiphy->max_scan_ssids = 1; + wl->hw->wiphy->max_sched_scan_ssids = 8; /* * Maximum length of elements in scanning probe request templates * should be the maximum length possible for a template, without diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c index 7229eaa89018..af9d53c8e19c 100644 --- a/drivers/net/wireless/wl12xx/scan.c +++ b/drivers/net/wireless/wl12xx/scan.c @@ -473,6 +473,48 @@ wl1271_scan_sched_scan_channels(struct wl1271 *wl, cfg->passive[2] || cfg->active[2]; } +/* Returns 0 if no wildcard is used, 1 if wildcard is used or a + * negative value on error */ +static int +wl12xx_scan_sched_scan_ssid_list(struct wl1271 *wl, + struct cfg80211_sched_scan_request *req) +{ + struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL; + struct cfg80211_ssid *ssid = req->ssids; + int ret, wildcard = 0; + + wl1271_debug(DEBUG_CMD, "cmd sched scan ssid list"); + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + while ((cmd->n_ssids < req->n_ssids) && ssid) { + if (ssid->ssid_len == 0) + wildcard = 1; + cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_HIDDEN; + cmd->ssids[cmd->n_ssids].len = ssid->ssid_len; + memcpy(cmd->ssids[cmd->n_ssids].ssid, ssid->ssid, + ssid->ssid_len); + ssid++; + cmd->n_ssids++; + } + + wl1271_dump(DEBUG_SCAN, "SSID_LIST: ", cmd, sizeof(*cmd)); + + ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd, + sizeof(*cmd), 0); + if (ret < 0) { + wl1271_error("cmd sched scan ssid list failed"); + goto out; + } + + ret = wildcard; +out: + kfree(cmd); + return ret; +} + int wl1271_scan_sched_scan_config(struct wl1271 *wl, struct cfg80211_sched_scan_request *req, struct ieee80211_sched_scan_ies *ies) @@ -504,14 +546,21 @@ int wl1271_scan_sched_scan_config(struct wl1271 *wl, for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++) cfg->intervals[i] = cpu_to_le32(req->interval); - if (!force_passive && req->ssids[0].ssid_len && req->ssids[0].ssid) { - cfg->filter_type = SCAN_SSID_FILTER_SPECIFIC; - cfg->ssid_len = req->ssids[0].ssid_len; - memcpy(cfg->ssid, req->ssids[0].ssid, - req->ssids[0].ssid_len); - } else { + cfg->ssid_len = 0; + if (req->n_ssids == 0) { + wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_ANY"); cfg->filter_type = SCAN_SSID_FILTER_ANY; - cfg->ssid_len = 0; + } else { + ret = wl12xx_scan_sched_scan_ssid_list(wl, req); + if (ret < 0) + goto out; + if (ret) { + wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_DISABLED"); + cfg->filter_type = SCAN_SSID_FILTER_DISABLED; + } else { + wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_LIST"); + cfg->filter_type = SCAN_SSID_FILTER_LIST; + } } if (!wl1271_scan_sched_scan_channels(wl, req, cfg)) { -- 2.20.1