| /* |
| * Copyright (c) 2017 The Linux Foundation. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| /* |
| * DOC: contains scan cache operations |
| */ |
| |
| #include <qdf_status.h> |
| #include <wlan_scan_ucfg_api.h> |
| #include <wlan_scan_utils_api.h> |
| #include "wlan_scan_cache_db.h" |
| #include "wlan_scan_main.h" |
| #include "wlan_scan_cache_db_i.h" |
| |
| bool scm_is_better_bss(struct scan_default_params *params, |
| struct scan_cache_entry *bss1, |
| struct scan_cache_entry *bss2) |
| { |
| bool ret; |
| if (bss1->bss_score > bss2->bss_score) |
| ret = true; |
| else |
| ret = false; |
| return ret; |
| |
| } |
| int scm_calculate_bss_score(struct wlan_objmgr_psoc *psoc, |
| struct scan_default_params *params, |
| struct scan_cache_entry *entry, |
| int pcl_chan_weight) |
| { |
| int32_t score = 0; |
| int32_t ap_load = 0; |
| int32_t normalised_width = BEST_CANDIDATE_20MHZ; |
| int32_t pcl_score = 0; |
| uint64_t temp_pcl_chan_weight = 0; |
| int32_t est_air_time_percentage = 0; |
| int32_t congestion = 0; |
| int32_t rssi_diff = 0; |
| int32_t rssi_weight = 0; |
| struct qbss_load_ie *qbss_load; |
| struct wlan_scan_obj *scan_obj; |
| int32_t ht_score, vht_score, qbss_score = 0; |
| |
| |
| scan_obj = wlan_psoc_get_scan_obj(psoc); |
| if (!scan_obj) { |
| scm_err("scan_obj is NULL"); |
| return 0; |
| } |
| /* |
| * Total weight of a BSSID is calculated on basis of 100 in which |
| * contribution of every factor is considered like this. |
| * RSSI: RSSI_WEIGHTAGE : 25 |
| * HT_CAPABILITY_WEIGHTAGE: 7 |
| * VHT_CAP_WEIGHTAGE: 5 |
| * BEAMFORMING_CAP_WEIGHTAGE: 2 |
| * CHAN_WIDTH_WEIGHTAGE:10 |
| * CHAN_BAND_WEIGHTAGE: 5 |
| * NSS: 5 |
| * PCL: 10 |
| * CHANNEL_CONGESTION: 5 |
| * Reserved: 31 |
| */ |
| /* |
| * Further bucketization of rssi is also done out of 25 score. |
| * RSSI > -55=> weight = 2500 |
| * RSSI > -60=> weight = 2250 |
| * RSSI >-65 =>weight = 2000 |
| * RSSI > -70=> weight = 1750 |
| * RSSI > -75=> weight = 1500 |
| * RSSI > -80=> weight = 1250 |
| */ |
| if (entry->rssi_raw) { |
| /* |
| * if RSSI of AP is less then -80, driver should ignore that |
| * candidate. |
| */ |
| if (entry->rssi_raw < BAD_RSSI) { |
| scm_err("Drop this BSS %pM due to low rssi %d", |
| entry->bssid.bytes, entry->rssi_raw); |
| score = 0; |
| return score; |
| } |
| if (entry->rssi_raw >= EXCELLENT_RSSI) { |
| rssi_weight = EXCELLENT_RSSI_WEIGHT * |
| RSSI_WEIGHTAGE; |
| } else { |
| rssi_diff = EXCELLENT_RSSI - entry->rssi_raw; |
| rssi_diff = rssi_diff/5; |
| rssi_weight = (rssi_diff + 1) * RSSI_WEIGHT_BUCKET; |
| rssi_weight = (EXCELLENT_RSSI_WEIGHT * |
| RSSI_WEIGHTAGE) - rssi_weight; |
| |
| } |
| score += rssi_weight; |
| } |
| if (pcl_chan_weight) { |
| temp_pcl_chan_weight = |
| (SCM_MAX_WEIGHT_OF_PCL_CHANNELS - pcl_chan_weight); |
| do_div(temp_pcl_chan_weight, |
| 20); |
| pcl_score = PCL_WEIGHT - temp_pcl_chan_weight; |
| |
| if (pcl_score < 0) |
| pcl_score = 0; |
| |
| score += pcl_score * BEST_CANDIDATE_MAX_WEIGHT; |
| } |
| /* If AP supports HT caps, extra 10% score will be added */ |
| if (entry->ie_list.htcap) { |
| ht_score = BEST_CANDIDATE_MAX_WEIGHT * HT_CAPABILITY_WEIGHTAGE; |
| score += BEST_CANDIDATE_MAX_WEIGHT * HT_CAPABILITY_WEIGHTAGE; |
| } |
| |
| /* If AP supports VHT caps, Extra 6% score will be added to score */ |
| if (entry->ie_list.vhtcap) { |
| vht_score = BEST_CANDIDATE_MAX_WEIGHT * VHT_CAP_WEIGHTAGE; |
| score += BEST_CANDIDATE_MAX_WEIGHT * VHT_CAP_WEIGHTAGE; |
| } |
| |
| /* |
| * Channel width is again calculated on basis of 100. |
| * Where if AP is |
| * 80MHZ = 100 |
| * 40MHZ = 70 |
| * 20MHZ = 30 weightage is given out of 100. |
| * Channel width weightage is given as CHAN_WIDTH_WEIGHTAGE (10%). |
| */ |
| if (entry->phy_mode == WLAN_PHYMODE_11AC_VHT20 || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT40PLUS || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT40MINUS || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT40 || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT80 || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT80_80 || |
| entry->phy_mode == WLAN_PHYMODE_11AC_VHT160) |
| normalised_width = BEST_CANDIDATE_80MHZ; |
| else if (entry->phy_mode == WLAN_PHYMODE_11NA_HT40PLUS || |
| entry->phy_mode == WLAN_PHYMODE_11NA_HT40MINUS || |
| entry->phy_mode == WLAN_PHYMODE_11NG_HT40PLUS || |
| entry->phy_mode == WLAN_PHYMODE_11NG_HT40MINUS || |
| entry->phy_mode == WLAN_PHYMODE_11NG_HT40 || |
| entry->phy_mode == WLAN_PHYMODE_11NA_HT40) |
| normalised_width = BEST_CANDIDATE_40MHZ; |
| else |
| normalised_width = BEST_CANDIDATE_20MHZ; |
| score += normalised_width * CHAN_WIDTH_WEIGHTAGE; |
| |
| if (util_scan_scm_chan_to_band( |
| entry->channel.chan_idx) == WLAN_BAND_5_GHZ && |
| entry->rssi_raw > RSSI_THRESHOLD_5GHZ) |
| score += BEST_CANDIDATE_MAX_WEIGHT * CHAN_BAND_WEIGHTAGE; |
| /* |
| * If ESP is being transmitted by the AP, use the estimated airtime for |
| * AC_BE from that, Estimated airtime 0-25% = 120, 25-50% = 250, 50-75% |
| * = 370, 75-100% = 500. |
| * Else if QBSSLoad is being transmitted and QBSSLoad < 25% = 500 |
| * else assing default weight of 370 |
| */ |
| if (entry->air_time_fraction) { |
| est_air_time_percentage = |
| entry->air_time_fraction * ROAM_MAX_CHANNEL_WEIGHT; |
| est_air_time_percentage = |
| est_air_time_percentage/MAX_ESTIMATED_AIR_TIME_FRACTION; |
| /* |
| * Calculate channel congestion from estimated air time |
| * fraction. |
| */ |
| congestion = MAX_CHANNEL_UTILIZATION - est_air_time_percentage; |
| if (congestion >= LOW_CHANNEL_CONGESTION && |
| congestion < MODERATE_CHANNEL_CONGESTION) |
| score += LOW_CHANNEL_CONGESTION_WEIGHT; |
| else if (congestion >= MODERATE_CHANNEL_CONGESTION && |
| congestion < CONSIDERABLE_CHANNEL_CONGESTION) |
| score += MODERATE_CHANNEL_CONGESTION_WEIGHT; |
| else if (congestion >= CONSIDERABLE_CHANNEL_CONGESTION && |
| congestion < HIGH_CHANNEL_CONGESTION) |
| score += CONSIDERABLE_CHANNEL_CONGESTION_WEIGHT; |
| else |
| score += HIGH_CHANNEL_CONGESTION_WEIGHT; |
| } else if (entry->ie_list.qbssload) { |
| qbss_load = (struct qbss_load_ie *) |
| util_scan_entry_qbssload(entry); |
| scm_debug("qbss_load is %d", qbss_load->qbss_chan_load); |
| /* |
| * Calculate ap_load in % from qbss channel load from 0-255 |
| * range |
| */ |
| ap_load = (qbss_load->qbss_chan_load * |
| BEST_CANDIDATE_MAX_WEIGHT); |
| ap_load = ap_load/MAX_AP_LOAD; |
| congestion = ap_load; |
| if (congestion < MODERATE_CHANNEL_CONGESTION) { |
| qbss_score = LOW_CHANNEL_CONGESTION_WEIGHT; |
| score += LOW_CHANNEL_CONGESTION_WEIGHT; |
| } else { |
| qbss_score = HIGH_CHANNEL_CONGESTION_WEIGHT; |
| score += HIGH_CHANNEL_CONGESTION_WEIGHT; |
| } |
| } else { |
| qbss_score = MODERATE_CHANNEL_CONGESTION_WEIGHT; |
| scm_debug("qbss load is not present so qbss_Score is %d", |
| qbss_score); |
| score += MODERATE_CHANNEL_CONGESTION_WEIGHT; |
| } |
| scm_debug(" ht_score %d vht_score %d and qbss_score %d", |
| ht_score, vht_score, qbss_score); |
| scm_debug(" BSS %pM rssi %d channel %d final score %d", |
| entry->bssid.bytes, |
| entry->rssi_raw, entry->channel.chan_idx, |
| score); |
| scm_info("nss %d", entry->nss); |
| entry->bss_score = score; |
| return score; |
| } |
| |
| /** |
| * scm_is_open_security() - Check if scan entry support open security |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if open security else false |
| */ |
| static bool scm_is_open_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| bool match = false; |
| int i; |
| |
| if (db_entry->cap_info.wlan_caps.privacy) |
| return false; |
| |
| /* Check MC cipher and Auth type requested. */ |
| for (i = 0; i < filter->num_of_mc_enc_type; i++) { |
| if (WLAN_ENCRYPT_TYPE_NONE == |
| filter->mc_enc_type[i]) { |
| security->mc_enc = |
| filter->mc_enc_type[i]; |
| match = true; |
| break; |
| } |
| } |
| if (!match && filter->num_of_mc_enc_type) |
| return match; |
| |
| match = false; |
| /* Check Auth list. It should contain AuthOpen. */ |
| for (i = 0; i < filter->num_of_auth; i++) { |
| if ((WLAN_AUTH_TYPE_OPEN_SYSTEM == |
| filter->auth_type[i]) || |
| (WLAN_AUTH_TYPE_AUTOSWITCH == |
| filter->auth_type[i])) { |
| security->auth_type = |
| WLAN_AUTH_TYPE_OPEN_SYSTEM; |
| match = true; |
| break; |
| } |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_is_cipher_match() - Check if cipher match the cipher list |
| * @cipher_list: cipher list to match |
| * @num_cipher: number of cipher in cipher list |
| * @cipher_to_match: cipher to found in cipher list |
| * |
| * Return: true if open security else false |
| */ |
| static bool scm_is_cipher_match( |
| uint32_t *cipher_list, |
| uint16_t num_cipher, uint32_t cipher_to_match) |
| { |
| int i; |
| bool match = false; |
| |
| for (i = 0; i < num_cipher ; i++) { |
| match = (cipher_list[i] == cipher_to_match); |
| if (match) |
| break; |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_get_cipher_suite_type() - get cypher suite type from enc type |
| * @enc: enc type |
| * |
| * Return: cypher suite type |
| */ |
| static uint8_t scm_get_cipher_suite_type(enum wlan_enc_type enc) |
| { |
| uint8_t cipher_type; |
| |
| switch (enc) { |
| case WLAN_ENCRYPT_TYPE_WEP40: |
| case WLAN_ENCRYPT_TYPE_WEP40_STATICKEY: |
| cipher_type = WLAN_CSE_WEP40; |
| break; |
| case WLAN_ENCRYPT_TYPE_WEP104: |
| case WLAN_ENCRYPT_TYPE_WEP104_STATICKEY: |
| cipher_type = WLAN_CSE_WEP104; |
| break; |
| case WLAN_ENCRYPT_TYPE_TKIP: |
| cipher_type = WLAN_CSE_TKIP; |
| break; |
| case WLAN_ENCRYPT_TYPE_AES: |
| cipher_type = WLAN_CSE_CCMP; |
| break; |
| case WLAN_ENCRYPT_TYPE_AES_GCMP: |
| cipher_type = WLAN_CSE_GCMP_128; |
| break; |
| case WLAN_ENCRYPT_TYPE_AES_GCMP_256: |
| cipher_type = WLAN_CSE_GCMP_256; |
| break; |
| case WLAN_ENCRYPT_TYPE_NONE: |
| cipher_type = WLAN_CSE_NONE; |
| break; |
| case WLAN_ENCRYPT_TYPE_WPI: |
| cipher_type = WLAN_WAI_CERT_OR_SMS4; |
| break; |
| default: |
| cipher_type = WLAN_CSE_RESERVED; |
| break; |
| } |
| |
| return cipher_type; |
| } |
| |
| /** |
| * scm_is_wep_security() - Check if scan entry support WEP security |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if WEP security else false |
| */ |
| static bool scm_is_wep_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| int i; |
| bool match = false; |
| enum wlan_auth_type neg_auth = WLAN_AUTH_TYPE_OPEN_SYSTEM; |
| enum wlan_enc_type neg_mccipher = WLAN_ENCRYPT_TYPE_NONE; |
| |
| /* If privacy bit is not set, consider no match */ |
| if (!db_entry->cap_info.wlan_caps.privacy) |
| return false; |
| |
| for (i = 0; i < filter->num_of_mc_enc_type; i++) { |
| switch (filter->mc_enc_type[i]) { |
| case WLAN_ENCRYPT_TYPE_WEP40_STATICKEY: |
| case WLAN_ENCRYPT_TYPE_WEP104_STATICKEY: |
| case WLAN_ENCRYPT_TYPE_WEP40: |
| case WLAN_ENCRYPT_TYPE_WEP104: |
| /* |
| * Multicast list may contain WEP40/WEP104. |
| * Check whether it matches UC. |
| */ |
| if (security->uc_enc == |
| filter->mc_enc_type[i]) { |
| match = true; |
| neg_mccipher = |
| filter->mc_enc_type[i]; |
| } |
| break; |
| default: |
| match = false; |
| break; |
| } |
| if (match) |
| break; |
| } |
| |
| if (!match) |
| return match; |
| |
| for (i = 0; i < filter->num_of_auth; i++) { |
| switch (filter->auth_type[i]) { |
| case WLAN_AUTH_TYPE_OPEN_SYSTEM: |
| case WLAN_AUTH_TYPE_SHARED_KEY: |
| case WLAN_AUTH_TYPE_AUTOSWITCH: |
| match = true; |
| neg_auth = filter->auth_type[i]; |
| break; |
| default: |
| match = false; |
| } |
| if (match) |
| break; |
| } |
| |
| if (!match) |
| return match; |
| |
| /* |
| * In case of WPA / WPA2, check whether it supports WEP as well. |
| * Prepare the encryption type for WPA/WPA2 functions |
| */ |
| if (security->uc_enc == WLAN_ENCRYPT_TYPE_WEP40_STATICKEY) |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP40; |
| else if (security->uc_enc == WLAN_ENCRYPT_TYPE_WEP104) |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP104; |
| |
| /* else we can use the encryption type directly */ |
| if (util_scan_entry_wpa(db_entry)) { |
| struct wlan_wpa_ie wpa = {0}; |
| uint8_t cipher_type; |
| |
| cipher_type = |
| scm_get_cipher_suite_type(security->uc_enc); |
| wlan_parse_wpa_ie( |
| util_scan_entry_wpa(db_entry), &wpa); |
| |
| match = scm_is_cipher_match(&wpa.mc_cipher, |
| 1, WLAN_WPA_SEL(cipher_type)); |
| } |
| if (!match && util_scan_entry_rsn(db_entry)) { |
| struct wlan_rsn_ie rsn = {0}; |
| uint8_t cipher_type; |
| |
| cipher_type = |
| scm_get_cipher_suite_type(security->uc_enc); |
| |
| wlan_parse_rsn_ie( |
| util_scan_entry_rsn(db_entry), &rsn); |
| match = scm_is_cipher_match(&rsn.gp_cipher_suite, |
| 1, WLAN_RSN_SEL(cipher_type)); |
| } |
| |
| |
| if (match && security) { |
| security->auth_type = neg_auth; |
| security->mc_enc = neg_mccipher; |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_check_pmf_match() - Check PMF security of entry match filter |
| * @filter: scan filter |
| * @rsn: rsn IE of the scan entry |
| * |
| * Return: true if PMF security match else false |
| */ |
| static bool |
| scm_check_pmf_match(struct scan_filter *filter, |
| struct wlan_rsn_ie *rsn) |
| { |
| enum wlan_pmf_cap ap_pmf_cap = WLAN_PMF_DISABLED; |
| |
| if (rsn->cap & RSN_CAP_MFP_CAPABLE) |
| ap_pmf_cap = WLAN_PMF_CAPABLE; |
| if (rsn->cap & RSN_CAP_MFP_CAPABLE) |
| ap_pmf_cap = WLAN_PMF_REQUIRED; |
| |
| if ((filter->pmf_cap == WLAN_PMF_REQUIRED) && |
| (ap_pmf_cap == WLAN_PMF_DISABLED)) |
| return false; |
| else if ((filter->pmf_cap == WLAN_PMF_DISABLED) && |
| (ap_pmf_cap == WLAN_PMF_REQUIRED)) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * scm_is_rsn_security() - Check if scan entry support RSN security |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if RSN security else false |
| */ |
| static bool scm_is_rsn_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| int i; |
| uint8_t cipher_type; |
| bool match = false; |
| enum wlan_auth_type neg_auth = WLAN_NUM_OF_SUPPORT_AUTH_TYPE; |
| enum wlan_enc_type neg_mccipher = WLAN_ENCRYPT_TYPE_NONE; |
| struct wlan_rsn_ie rsn = {0}; |
| |
| if (!util_scan_entry_rsn(db_entry)) |
| return false; |
| |
| wlan_parse_rsn_ie( |
| util_scan_entry_rsn(db_entry), &rsn); |
| |
| cipher_type = |
| scm_get_cipher_suite_type(security->uc_enc); |
| match = scm_is_cipher_match(rsn.pwise_cipher_suites, |
| rsn.pwise_cipher_count, WLAN_RSN_SEL(cipher_type)); |
| if (!match) |
| return false; |
| |
| for (i = 0; i < filter->num_of_mc_enc_type; i++) { |
| cipher_type = |
| scm_get_cipher_suite_type( |
| filter->mc_enc_type[i]); |
| match = scm_is_cipher_match(&rsn.gp_cipher_suite, |
| 1, WLAN_RSN_SEL(cipher_type)); |
| if (match) |
| break; |
| } |
| if (!match) |
| return false; |
| |
| neg_mccipher = filter->mc_enc_type[i]; |
| |
| /* Initializing with false as it has true value already */ |
| match = false; |
| for (i = 0; i < filter->num_of_auth; i++) { |
| /* |
| * Ciphers are supported, Match authentication algorithm and |
| * pick first matching authtype. |
| */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FILS_FT_SHA384))) { |
| if (WLAN_AUTH_TYPE_FT_FILS_SHA384 == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FT_FILS_SHA384; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FILS_FT_SHA256))) { |
| if (WLAN_AUTH_TYPE_FT_FILS_SHA256 == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FT_FILS_SHA256; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FILS_SHA384))) { |
| if (WLAN_AUTH_TYPE_FILS_SHA384 == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FILS_SHA384; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FILS_SHA256))) { |
| if (WLAN_AUTH_TYPE_FILS_SHA256 == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FILS_SHA256; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, WLAN_RSN_DPP_AKM)) { |
| if (WLAN_AUTH_TYPE_DPP_RSN == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_DPP_RSN; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_OWE))) { |
| if (WLAN_AUTH_TYPE_OWE == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_OWE; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FT_IEEE8021X))) { |
| if (WLAN_AUTH_TYPE_FT_RSN == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FT_RSN; |
| match = true; |
| break; |
| } |
| } |
| |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_FT_PSK))) { |
| if (WLAN_AUTH_TYPE_FT_RSN_PSK == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_FT_RSN_PSK; |
| match = true; |
| break; |
| } |
| } |
| /* ESE only supports 802.1X. No PSK. */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_CCKM_AKM)) { |
| if (WLAN_AUTH_TYPE_CCKM_RSN == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_CCKM_RSN; |
| match = true; |
| break; |
| } |
| } |
| /* RSN */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_IEEE8021X))) { |
| if (WLAN_AUTH_TYPE_RSN == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_RSN; |
| match = true; |
| break; |
| } |
| } |
| /* TKIP */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_PSK))) { |
| if (WLAN_AUTH_TYPE_RSN_PSK == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_RSN_PSK; |
| match = true; |
| break; |
| } |
| } |
| /* SHA256 */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_SHA256_PSK))) { |
| if (WLAN_AUTH_TYPE_RSN_PSK_SHA256 == |
| filter->auth_type[i]) { |
| neg_auth = |
| WLAN_AUTH_TYPE_RSN_PSK_SHA256; |
| match = true; |
| break; |
| } |
| } |
| /* 8021X SHA256 */ |
| if (scm_is_cipher_match(rsn.akm_suites, |
| rsn.akm_suite_count, |
| WLAN_RSN_SEL(WLAN_AKM_SHA256_IEEE8021X))) { |
| if (WLAN_AUTH_TYPE_RSN_8021X_SHA256 == |
| filter->auth_type[i]) { |
| neg_auth = |
| WLAN_AUTH_TYPE_RSN_8021X_SHA256; |
| match = true; |
| break; |
| } |
| } |
| } |
| |
| if (!match) |
| return false; |
| match = scm_check_pmf_match(filter, &rsn); |
| |
| if (match && security) { |
| security->auth_type = neg_auth; |
| security->mc_enc = neg_mccipher; |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_is_wpa_security() - Check if scan entry support WPA security |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if WPA security else false |
| */ |
| static bool scm_is_wpa_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| int i; |
| uint8_t cipher_type; |
| bool match = false; |
| enum wlan_auth_type neg_auth = WLAN_NUM_OF_SUPPORT_AUTH_TYPE; |
| enum wlan_enc_type neg_mccipher = WLAN_ENCRYPT_TYPE_NONE; |
| struct wlan_wpa_ie wpa = {0}; |
| |
| if (!util_scan_entry_wpa(db_entry)) |
| return false; |
| |
| wlan_parse_wpa_ie(util_scan_entry_wpa(db_entry), &wpa); |
| |
| cipher_type = |
| scm_get_cipher_suite_type(security->uc_enc); |
| match = scm_is_cipher_match(wpa.uc_ciphers, |
| wpa.uc_cipher_count, WLAN_WPA_SEL(cipher_type)); |
| if (!match) |
| return false; |
| |
| for (i = 0; i < filter->num_of_mc_enc_type; i++) { |
| cipher_type = |
| scm_get_cipher_suite_type( |
| filter->mc_enc_type[i]); |
| match = scm_is_cipher_match(&wpa.mc_cipher, |
| 1, WLAN_WPA_SEL(cipher_type)); |
| if (match) |
| break; |
| } |
| if (!match) |
| return false; |
| neg_mccipher = filter->mc_enc_type[i]; |
| |
| /* Initializing with false as it has true value already */ |
| match = false; |
| for (i = 0; i < filter->num_of_auth; i++) { |
| /* |
| * Ciphers are supported, Match authentication algorithm and |
| * pick first matching authtype. |
| */ |
| /**/ |
| if (scm_is_cipher_match(wpa.auth_suites, |
| wpa.auth_suite_count, |
| WLAN_WPA_SEL(WLAN_AKM_IEEE8021X))) { |
| if (WLAN_AUTH_TYPE_WPA == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_WPA; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(wpa.auth_suites, |
| wpa.auth_suite_count, |
| WLAN_WPA_SEL(WLAN_AKM_PSK))) { |
| if (WLAN_AUTH_TYPE_WPA_PSK == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_WPA_PSK; |
| match = true; |
| break; |
| } |
| } |
| if (scm_is_cipher_match(wpa.auth_suites, |
| wpa.auth_suite_count, |
| WLAN_WPA_CCKM_AKM)) { |
| if (WLAN_AUTH_TYPE_CCKM_WPA == |
| filter->auth_type[i]) { |
| neg_auth = WLAN_AUTH_TYPE_CCKM_WPA; |
| match = true; |
| break; |
| } |
| } |
| } |
| |
| if (match && security) { |
| security->auth_type = neg_auth; |
| security->mc_enc = neg_mccipher; |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_is_wapi_security() - Check if scan entry support WAPI security |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if WAPI security else false |
| */ |
| static bool scm_is_wapi_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| int i; |
| uint8_t cipher_type; |
| bool match = false; |
| enum wlan_auth_type neg_auth = WLAN_NUM_OF_SUPPORT_AUTH_TYPE; |
| enum wlan_enc_type neg_mccipher = WLAN_ENCRYPT_TYPE_NONE; |
| struct wlan_wapi_ie wapi = {0}; |
| |
| if (!util_scan_entry_wapi(db_entry)) |
| return false; |
| |
| wlan_parse_wapi_ie( |
| util_scan_entry_wapi(db_entry), &wapi); |
| |
| cipher_type = |
| scm_get_cipher_suite_type(security->uc_enc); |
| match = scm_is_cipher_match(wapi.uc_cipher_suites, |
| wapi.uc_cipher_count, WLAN_WAPI_SEL(cipher_type)); |
| if (!match) |
| return false; |
| |
| for (i = 0; i < filter->num_of_mc_enc_type; i++) { |
| cipher_type = |
| scm_get_cipher_suite_type( |
| filter->mc_enc_type[i]); |
| match = scm_is_cipher_match(&wapi.mc_cipher_suite, |
| 1, WLAN_WAPI_SEL(cipher_type)); |
| if (match) |
| break; |
| } |
| if (!match) |
| return false; |
| neg_mccipher = filter->mc_enc_type[i]; |
| |
| if (scm_is_cipher_match(wapi.akm_suites, |
| wapi.akm_suite_count, |
| WLAN_WAPI_SEL(WLAN_WAI_CERT_OR_SMS4))) |
| neg_auth = |
| WLAN_AUTH_TYPE_WAPI_WAI_CERTIFICATE; |
| else if (scm_is_cipher_match(wapi.akm_suites, |
| wapi.akm_suite_count, WLAN_WAPI_SEL(WLAN_WAI_PSK))) |
| neg_auth = WLAN_AUTH_TYPE_WAPI_WAI_PSK; |
| else |
| return false; |
| |
| match = false; |
| for (i = 0; i < filter->num_of_auth; i++) { |
| if (filter->auth_type[i] == neg_auth) { |
| match = true; |
| break; |
| } |
| } |
| |
| if (match && security) { |
| security->auth_type = neg_auth; |
| security->mc_enc = neg_mccipher; |
| } |
| |
| return match; |
| } |
| |
| /** |
| * scm_is_def_security() - Check if any security in filter match |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if any security else false |
| */ |
| static bool scm_is_def_security(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| bool match_any = false; |
| bool match = true; |
| |
| /* It is allowed to match anything. Try the more secured ones first. */ |
| /* Check AES first */ |
| security->uc_enc = WLAN_ENCRYPT_TYPE_AES; |
| match_any = scm_is_rsn_security(filter, |
| db_entry, security); |
| if (!match_any) { |
| /* Check TKIP */ |
| security->uc_enc = WLAN_ENCRYPT_TYPE_TKIP; |
| match_any = scm_is_rsn_security(filter, |
| db_entry, security); |
| } |
| |
| if (!match_any) { |
| /* Check WAPI */ |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WPI; |
| match_any = scm_is_wapi_security(filter, |
| db_entry, security); |
| } |
| |
| if (match_any) |
| return match; |
| |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP104; |
| if (scm_is_wep_security(filter, |
| db_entry, security)) |
| return true; |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP40; |
| if (scm_is_wep_security(filter, |
| db_entry, security)) |
| return true; |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP104_STATICKEY; |
| if (scm_is_wep_security(filter, |
| db_entry, security)) |
| return true; |
| security->uc_enc = WLAN_ENCRYPT_TYPE_WEP40_STATICKEY; |
| if (scm_is_wep_security(filter, |
| db_entry, security)) |
| return true; |
| |
| /* It must be open and no enc */ |
| if (db_entry->cap_info.wlan_caps.privacy) |
| return false; |
| |
| security->auth_type = WLAN_AUTH_TYPE_OPEN_SYSTEM; |
| security->mc_enc = WLAN_ENCRYPT_TYPE_NONE; |
| security->uc_enc = WLAN_ENCRYPT_TYPE_NONE; |
| |
| return match; |
| } |
| |
| /** |
| * scm_is_fils_config_match() - Check if FILS config matches |
| * @filter: scan filter |
| * @db_entry: db entry |
| * |
| * Return: true if FILS config matches else false |
| */ |
| static bool scm_is_fils_config_match(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry) |
| { |
| int i; |
| struct fils_indication_ie *indication_ie; |
| uint8_t *data; |
| |
| if (!filter->fils_scan_filter.realm_check) |
| return true; |
| |
| if (!db_entry->ie_list.fils_indication) |
| return false; |
| |
| |
| indication_ie = |
| (struct fils_indication_ie *) db_entry->ie_list.fils_indication; |
| |
| data = indication_ie->variable_data; |
| if (indication_ie->is_cache_id_present) |
| data += CACHE_IDENTIFIER_LEN; |
| |
| if (indication_ie->is_hessid_present) |
| data += HESSID_LEN; |
| |
| for (i = 1; i <= indication_ie->realm_identifiers_cnt; i++) { |
| if (!qdf_mem_cmp(filter->fils_scan_filter.fils_realm, |
| data, REAM_HASH_LEN)) |
| return true; |
| /* Max realm count reached */ |
| if (indication_ie->realm_identifiers_cnt == i) |
| break; |
| else |
| data = data + REAM_HASH_LEN; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * scm_is_security_match() - Check if security in filter match |
| * @filter: scan filter |
| * @db_entry: db entry |
| * @security: matched security. |
| * |
| * Return: true if security match else false |
| */ |
| static bool scm_is_security_match(struct scan_filter *filter, |
| struct scan_cache_entry *db_entry, |
| struct security_info *security) |
| { |
| int i; |
| bool match = false; |
| struct security_info local_security = {0}; |
| |
| if (!filter->num_of_enc_type) |
| return true; |
| |
| for (i = 0; (i < filter->num_of_enc_type) && |
| !match; i++) { |
| |
| local_security.uc_enc = |
| filter->enc_type[i]; |
| |
| switch (filter->enc_type[i]) { |
| case WLAN_ENCRYPT_TYPE_NONE: |
| match = scm_is_open_security(filter, |
| db_entry, &local_security); |
| break; |
| case WLAN_ENCRYPT_TYPE_WEP40_STATICKEY: |
| case WLAN_ENCRYPT_TYPE_WEP104_STATICKEY: |
| case WLAN_ENCRYPT_TYPE_WEP40: |
| case WLAN_ENCRYPT_TYPE_WEP104: |
| match = scm_is_wep_security(filter, |
| db_entry, &local_security); |
| break; |
| case WLAN_ENCRYPT_TYPE_TKIP: |
| case WLAN_ENCRYPT_TYPE_AES: |
| case WLAN_ENCRYPT_TYPE_AES_GCMP: |
| case WLAN_ENCRYPT_TYPE_AES_GCMP_256: |
| /* First check if there is a RSN match */ |
| match = scm_is_rsn_security(filter, |
| db_entry, &local_security); |
| /* If not RSN, then check WPA match */ |
| if (!match) |
| match = scm_is_wpa_security(filter, |
| db_entry, &local_security); |
| break; |
| case WLAN_ENCRYPT_TYPE_WPI:/* WAPI */ |
| match = scm_is_wapi_security(filter, |
| db_entry, &local_security); |
| break; |
| case WLAN_ENCRYPT_TYPE_ANY: |
| default: |
| match = scm_is_def_security(filter, |
| db_entry, &local_security); |
| break; |
| } |
| } |
| |
| if (match && security) |
| qdf_mem_copy(security, |
| &local_security, sizeof(*security)); |
| |
| return match; |
| } |
| |
| bool scm_filter_match(struct wlan_objmgr_psoc *psoc, |
| struct scan_cache_entry *db_entry, |
| struct scan_filter *filter, |
| struct security_info *security) |
| { |
| int i; |
| bool match = false; |
| struct roam_filter_params *roam_params; |
| struct scan_default_params *def_param; |
| |
| def_param = wlan_scan_psoc_get_def_params(psoc); |
| roam_params = &def_param->roam_params; |
| |
| if (filter->p2p_results && !db_entry->is_p2p) |
| return false; |
| |
| for (i = 0; i < roam_params->num_bssid_avoid_list; i++) |
| if (qdf_is_macaddr_equal(&roam_params->bssid_avoid_list[i], |
| &db_entry->bssid)) |
| return false; |
| |
| match = false; |
| if (db_entry->ssid.length) { |
| for (i = 0; i < filter->num_of_ssid; i++) { |
| if (util_is_ssid_match(&filter->ssid_list[i], |
| &db_entry->ssid)) { |
| match = true; |
| break; |
| } |
| } |
| } |
| if (!match && filter->num_of_ssid) |
| return false; |
| |
| match = false; |
| /* TO do Fill p2p MAC*/ |
| for (i = 0; i < filter->num_of_bssid; i++) { |
| if (util_is_bssid_match(&filter->bssid_list[i], |
| &db_entry->bssid)) { |
| match = true; |
| break; |
| } |
| /* TODO match p2p mac */ |
| } |
| if (!match && filter->num_of_bssid) |
| return false; |
| |
| match = false; |
| for (i = 0; i < filter->num_of_channels; i++) { |
| if (!filter->channel_list[i] || ( |
| (filter->channel_list[i] == |
| db_entry->channel.chan_idx))) { |
| match = true; |
| break; |
| } |
| } |
| |
| if (!match && filter->num_of_channels) |
| return false; |
| |
| if (filter->rrm_measurement_filter) |
| return true; |
| |
| /* TODO match phyMode */ |
| |
| if (!filter->ignore_auth_enc_type && |
| !scm_is_security_match(filter, |
| db_entry, security)) |
| return false; |
| |
| if (!util_is_bss_type_match(filter->bss_type, |
| db_entry->cap_info)) |
| return false; |
| |
| /* TODO match rate set */ |
| |
| if (filter->only_wmm_ap && |
| !db_entry->ie_list.wmeinfo && |
| !db_entry->ie_list.wmeparam) |
| return false; |
| |
| /* Match realm */ |
| if (!scm_is_fils_config_match(filter, db_entry)) |
| return false; |
| |
| if (!util_country_code_match(filter->country, |
| db_entry->ie_list.country)) |
| return false; |
| |
| if (!util_mdie_match(filter->mobility_domain, |
| (struct rsn_mdie *)db_entry->ie_list.mdie)) |
| return false; |
| |
| return true; |
| } |
| bool scm_get_pcl_weight_of_channel(int channel_id, |
| struct scan_filter *filter, |
| int *pcl_chan_weight, |
| uint8_t *weight_list) |
| { |
| int i; |
| bool found = false; |
| |
| if (NULL == filter) |
| return found; |
| |
| for (i = 0; i < filter->num_of_pcl_channels; i++) { |
| if (filter->pcl_channel_list[i] == channel_id) { |
| *pcl_chan_weight = filter->pcl_weight_list[i]; |
| found = true; |
| break; |
| } |
| } |
| return found; |
| } |