diff options
Diffstat (limited to 'net')
-rw-r--r-- | net/mac80211/ieee80211_i.h | 18 | ||||
-rw-r--r-- | net/mac80211/mlme.c | 230 |
2 files changed, 89 insertions, 159 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 8361054fb7cf..2bb546744b94 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -79,16 +79,11 @@ struct ieee80211_sta_bss { enum ieee80211_band band; int freq; int signal, noise, qual; - u8 *wpa_ie; - size_t wpa_ie_len; - u8 *rsn_ie; - size_t rsn_ie_len; - u8 *wmm_ie; - size_t wmm_ie_len; - u8 *ht_ie; - size_t ht_ie_len; - u8 *ht_add_ie; - size_t ht_add_ie_len; + u8 *ies; /* all information elements from the last Beacon or Probe + * Response frames; note Beacon frame is not allowed to + * override values from Probe Response */ + size_t ies_len; + bool wmm_used; #ifdef CONFIG_MAC80211_MESH u8 *mesh_id; size_t mesh_id_len; @@ -773,6 +768,9 @@ struct ieee80211_ra_tid { /* Parsed Information Elements */ struct ieee802_11_elems { + u8 *ie_start; + size_t total_len; + /* pointers to IEs */ u8 *ssid; u8 *supp_rates; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 84999791a332..e088b440aafa 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -98,6 +98,8 @@ void ieee802_11_parse_elems(u8 *start, size_t len, u8 *pos = start; memset(elems, 0, sizeof(*elems)); + elems->ie_start = start; + elems->total_len = len; while (left >= 2) { u8 id, elen; @@ -234,6 +236,27 @@ void ieee802_11_parse_elems(u8 *start, size_t len, } +static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie) +{ + u8 *end, *pos; + + pos = bss->ies; + if (pos == NULL) + return NULL; + end = pos + bss->ies_len; + + while (pos + 1 < end) { + if (pos + 2 + pos[1] > end) + break; + if (pos[0] == ie) + return pos; + pos += 2 + pos[1]; + } + + return NULL; +} + + static int ecw2cw(int ecw) { return (1 << ecw) - 1; @@ -737,7 +760,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct sk_buff *skb; struct ieee80211_mgmt *mgmt; - u8 *pos, *ies; + u8 *pos, *ies, *ht_add_ie; int i, len, count, rates_len, supp_rates_len; u16 capab; struct ieee80211_sta_bss *bss; @@ -772,7 +795,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, if (bss) { if (bss->capability & WLAN_CAPABILITY_PRIVACY) capab |= WLAN_CAPABILITY_PRIVACY; - if (bss->wmm_ie) + if (bss->wmm_used) wmm = 1; /* get all rates supported by the device and the AP as @@ -894,9 +917,10 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, /* wmm support is a must to HT */ if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && - sband->ht_info.ht_supported && bss->ht_add_ie) { + sband->ht_info.ht_supported && + (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { struct ieee80211_ht_addt_info *ht_add_info = - (struct ieee80211_ht_addt_info *)bss->ht_add_ie; + (struct ieee80211_ht_addt_info *)ht_add_ie; u16 cap = sband->ht_info.cap; __le16 tmp; u32 flags = local->hw.conf.channel->flags; @@ -2372,11 +2396,7 @@ ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_i static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) { - kfree(bss->wpa_ie); - kfree(bss->rsn_ie); - kfree(bss->wmm_ie); - kfree(bss->ht_ie); - kfree(bss->ht_add_ie); + kfree(bss->ies); kfree(bss_mesh_id(bss)); kfree(bss_mesh_cfg(bss)); kfree(bss); @@ -2662,43 +2682,6 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, bss->has_erp_value = 1; } - if (elems->ht_cap_elem && - (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len || - memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) { - kfree(bss->ht_ie); - bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC); - if (bss->ht_ie) { - memcpy(bss->ht_ie, elems->ht_cap_elem - 2, - elems->ht_cap_elem_len + 2); - bss->ht_ie_len = elems->ht_cap_elem_len + 2; - } else - bss->ht_ie_len = 0; - } else if (!elems->ht_cap_elem && bss->ht_ie) { - kfree(bss->ht_ie); - bss->ht_ie = NULL; - bss->ht_ie_len = 0; - } - - if (elems->ht_info_elem && - (!bss->ht_add_ie || - bss->ht_add_ie_len != elems->ht_info_elem_len || - memcmp(bss->ht_add_ie, elems->ht_info_elem, - elems->ht_info_elem_len))) { - kfree(bss->ht_add_ie); - bss->ht_add_ie = - kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC); - if (bss->ht_add_ie) { - memcpy(bss->ht_add_ie, elems->ht_info_elem - 2, - elems->ht_info_elem_len + 2); - bss->ht_add_ie_len = elems->ht_info_elem_len + 2; - } else - bss->ht_add_ie_len = 0; - } else if (!elems->ht_info_elem && bss->ht_add_ie) { - kfree(bss->ht_add_ie); - bss->ht_add_ie = NULL; - bss->ht_add_ie_len = 0; - } - bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); @@ -2749,88 +2732,17 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, return; } - if (elems->wpa && - (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len || - memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) { - kfree(bss->wpa_ie); - bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC); - if (bss->wpa_ie) { - memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2); - bss->wpa_ie_len = elems->wpa_len + 2; - } else - bss->wpa_ie_len = 0; - } else if (!elems->wpa && bss->wpa_ie) { - kfree(bss->wpa_ie); - bss->wpa_ie = NULL; - bss->wpa_ie_len = 0; - } - - if (elems->rsn && - (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len || - memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) { - kfree(bss->rsn_ie); - bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC); - if (bss->rsn_ie) { - memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2); - bss->rsn_ie_len = elems->rsn_len + 2; - } else - bss->rsn_ie_len = 0; - } else if (!elems->rsn && bss->rsn_ie) { - kfree(bss->rsn_ie); - bss->rsn_ie = NULL; - bss->rsn_ie_len = 0; + if (bss->ies == NULL || bss->ies_len < elems->total_len) { + kfree(bss->ies); + bss->ies = kmalloc(elems->total_len, GFP_ATOMIC); } + if (bss->ies) { + memcpy(bss->ies, elems->ie_start, elems->total_len); + bss->ies_len = elems->total_len; + } else + bss->ies_len = 0; - /* - * Cf. - * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC - * - * quoting: - * - * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia - * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi - * Alliance (September 1, 2004) is incorporated by reference herein. - * The inclusion of the WMM Parameters in probe responses and - * association responses is mandatory for WMM enabled networks. The - * inclusion of the WMM Parameters in beacons, however, is optional. - */ - - if (elems->wmm_param && - (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len || - memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) { - kfree(bss->wmm_ie); - bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC); - if (bss->wmm_ie) { - memcpy(bss->wmm_ie, elems->wmm_param - 2, - elems->wmm_param_len + 2); - bss->wmm_ie_len = elems->wmm_param_len + 2; - } else - bss->wmm_ie_len = 0; - } else if (elems->wmm_info && - (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len || - memcmp(bss->wmm_ie, elems->wmm_info, - elems->wmm_info_len))) { - /* As for certain AP's Fifth bit is not set in WMM IE in - * beacon frames.So while parsing the beacon frame the - * wmm_info structure is used instead of wmm_param. - * wmm_info structure was never used to set bss->wmm_ie. - * This code fixes this problem by copying the WME - * information from wmm_info to bss->wmm_ie and enabling - * n-band association. - */ - kfree(bss->wmm_ie); - bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC); - if (bss->wmm_ie) { - memcpy(bss->wmm_ie, elems->wmm_info - 2, - elems->wmm_info_len + 2); - bss->wmm_ie_len = elems->wmm_info_len + 2; - } else - bss->wmm_ie_len = 0; - } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) { - kfree(bss->wmm_ie); - bss->wmm_ie = NULL; - bss->wmm_ie_len = 0; - } + bss->wmm_used = elems->wmm_param || elems->wmm_info; /* check if we need to merge IBSS */ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && @@ -4146,6 +4058,48 @@ int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t return 0; } + +static void ieee80211_sta_add_scan_ies(struct iw_request_info *info, + struct ieee80211_sta_bss *bss, + char **current_ev, char *end_buf) +{ + u8 *pos, *end, *next; + struct iw_event iwe; + + if (bss == NULL || bss->ies == NULL) + return; + + /* + * If needed, fragment the IEs buffer (at IE boundaries) into short + * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. + */ + pos = bss->ies; + end = pos + bss->ies_len; + + while (end - pos > IW_GENERIC_IE_MAX) { + next = pos + 2 + pos[1]; + while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) + next = next + 2 + next[1]; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = next - pos; + *current_ev = iwe_stream_add_point(info, *current_ev, + end_buf, &iwe, pos); + + pos = next; + } + + if (end > pos) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = end - pos; + *current_ev = iwe_stream_add_point(info, *current_ev, + end_buf, &iwe, pos); + } +} + + static char * ieee80211_sta_scan_result(struct ieee80211_local *local, struct iw_request_info *info, @@ -4225,29 +4179,7 @@ ieee80211_sta_scan_result(struct ieee80211_local *local, current_ev = iwe_stream_add_point(info, current_ev, end_buf, &iwe, ""); - if (bss && bss->wpa_ie) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = bss->wpa_ie_len; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, bss->wpa_ie); - } - - if (bss && bss->rsn_ie) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = bss->rsn_ie_len; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, bss->rsn_ie); - } - - if (bss && bss->ht_ie) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = bss->ht_ie_len; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, bss->ht_ie); - } + ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf); if (bss && bss->supp_rates_len > 0) { /* display all supported rates in readable format */ |