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authorJohannes Berg <johannes.berg@intel.com>2011-11-18 10:54:50 -0500
committerJohn W. Linville <linville@tuxdriver.com>2011-11-21 16:20:49 -0500
commitdd76986b0e398978ca32dd60c1b7dc50ab4e9ae1 (patch)
treefea61a3dcb75a0c90e772b2beeaf4edb49ae7b50 /net
parent80b998993d97d8a13589f8462e62a60298c72cf2 (diff)
cfg80211/mac80211: Revert "move information element parsing logic to cfg80211"
No other driver ever ended up using this, and the commit forgot to move the prototype so no driver could have used it. Revert it, if any driver shows up and needs it it can be moved again, but until then it's more efficient to have it in mac80211 where the only user is. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/ieee80211_i.h63
-rw-r--r--net/mac80211/util.c167
-rw-r--r--net/wireless/util.c168
3 files changed, 230 insertions, 168 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index f2785056d8d9..17661df1515f 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1040,6 +1040,69 @@ struct ieee80211_ra_tid {
1040 u16 tid; 1040 u16 tid;
1041}; 1041};
1042 1042
1043/* Parsed Information Elements */
1044struct ieee802_11_elems {
1045 u8 *ie_start;
1046 size_t total_len;
1047
1048 /* pointers to IEs */
1049 u8 *ssid;
1050 u8 *supp_rates;
1051 u8 *fh_params;
1052 u8 *ds_params;
1053 u8 *cf_params;
1054 struct ieee80211_tim_ie *tim;
1055 u8 *ibss_params;
1056 u8 *challenge;
1057 u8 *wpa;
1058 u8 *rsn;
1059 u8 *erp_info;
1060 u8 *ext_supp_rates;
1061 u8 *wmm_info;
1062 u8 *wmm_param;
1063 struct ieee80211_ht_cap *ht_cap_elem;
1064 struct ieee80211_ht_info *ht_info_elem;
1065 struct ieee80211_meshconf_ie *mesh_config;
1066 u8 *mesh_id;
1067 u8 *peering;
1068 u8 *preq;
1069 u8 *prep;
1070 u8 *perr;
1071 struct ieee80211_rann_ie *rann;
1072 u8 *ch_switch_elem;
1073 u8 *country_elem;
1074 u8 *pwr_constr_elem;
1075 u8 *quiet_elem; /* first quite element */
1076 u8 *timeout_int;
1077
1078 /* length of them, respectively */
1079 u8 ssid_len;
1080 u8 supp_rates_len;
1081 u8 fh_params_len;
1082 u8 ds_params_len;
1083 u8 cf_params_len;
1084 u8 tim_len;
1085 u8 ibss_params_len;
1086 u8 challenge_len;
1087 u8 wpa_len;
1088 u8 rsn_len;
1089 u8 erp_info_len;
1090 u8 ext_supp_rates_len;
1091 u8 wmm_info_len;
1092 u8 wmm_param_len;
1093 u8 mesh_id_len;
1094 u8 peering_len;
1095 u8 preq_len;
1096 u8 prep_len;
1097 u8 perr_len;
1098 u8 ch_switch_elem_len;
1099 u8 country_elem_len;
1100 u8 pwr_constr_elem_len;
1101 u8 quiet_elem_len;
1102 u8 num_of_quiet_elem; /* can be more the one */
1103 u8 timeout_int_len;
1104};
1105
1043static inline struct ieee80211_local *hw_to_local( 1106static inline struct ieee80211_local *hw_to_local(
1044 struct ieee80211_hw *hw) 1107 struct ieee80211_hw *hw)
1045{ 1108{
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 939bf248ec73..e2cb00df8c36 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -19,6 +19,7 @@
19#include <linux/etherdevice.h> 19#include <linux/etherdevice.h>
20#include <linux/if_arp.h> 20#include <linux/if_arp.h>
21#include <linux/bitmap.h> 21#include <linux/bitmap.h>
22#include <linux/crc32.h>
22#include <net/net_namespace.h> 23#include <net/net_namespace.h>
23#include <net/cfg80211.h> 24#include <net/cfg80211.h>
24#include <net/rtnetlink.h> 25#include <net/rtnetlink.h>
@@ -563,6 +564,172 @@ void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
563} 564}
564EXPORT_SYMBOL(ieee80211_queue_delayed_work); 565EXPORT_SYMBOL(ieee80211_queue_delayed_work);
565 566
567u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
568 struct ieee802_11_elems *elems,
569 u64 filter, u32 crc)
570{
571 size_t left = len;
572 u8 *pos = start;
573 bool calc_crc = filter != 0;
574
575 memset(elems, 0, sizeof(*elems));
576 elems->ie_start = start;
577 elems->total_len = len;
578
579 while (left >= 2) {
580 u8 id, elen;
581
582 id = *pos++;
583 elen = *pos++;
584 left -= 2;
585
586 if (elen > left)
587 break;
588
589 if (calc_crc && id < 64 && (filter & (1ULL << id)))
590 crc = crc32_be(crc, pos - 2, elen + 2);
591
592 switch (id) {
593 case WLAN_EID_SSID:
594 elems->ssid = pos;
595 elems->ssid_len = elen;
596 break;
597 case WLAN_EID_SUPP_RATES:
598 elems->supp_rates = pos;
599 elems->supp_rates_len = elen;
600 break;
601 case WLAN_EID_FH_PARAMS:
602 elems->fh_params = pos;
603 elems->fh_params_len = elen;
604 break;
605 case WLAN_EID_DS_PARAMS:
606 elems->ds_params = pos;
607 elems->ds_params_len = elen;
608 break;
609 case WLAN_EID_CF_PARAMS:
610 elems->cf_params = pos;
611 elems->cf_params_len = elen;
612 break;
613 case WLAN_EID_TIM:
614 if (elen >= sizeof(struct ieee80211_tim_ie)) {
615 elems->tim = (void *)pos;
616 elems->tim_len = elen;
617 }
618 break;
619 case WLAN_EID_IBSS_PARAMS:
620 elems->ibss_params = pos;
621 elems->ibss_params_len = elen;
622 break;
623 case WLAN_EID_CHALLENGE:
624 elems->challenge = pos;
625 elems->challenge_len = elen;
626 break;
627 case WLAN_EID_VENDOR_SPECIFIC:
628 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
629 pos[2] == 0xf2) {
630 /* Microsoft OUI (00:50:F2) */
631
632 if (calc_crc)
633 crc = crc32_be(crc, pos - 2, elen + 2);
634
635 if (pos[3] == 1) {
636 /* OUI Type 1 - WPA IE */
637 elems->wpa = pos;
638 elems->wpa_len = elen;
639 } else if (elen >= 5 && pos[3] == 2) {
640 /* OUI Type 2 - WMM IE */
641 if (pos[4] == 0) {
642 elems->wmm_info = pos;
643 elems->wmm_info_len = elen;
644 } else if (pos[4] == 1) {
645 elems->wmm_param = pos;
646 elems->wmm_param_len = elen;
647 }
648 }
649 }
650 break;
651 case WLAN_EID_RSN:
652 elems->rsn = pos;
653 elems->rsn_len = elen;
654 break;
655 case WLAN_EID_ERP_INFO:
656 elems->erp_info = pos;
657 elems->erp_info_len = elen;
658 break;
659 case WLAN_EID_EXT_SUPP_RATES:
660 elems->ext_supp_rates = pos;
661 elems->ext_supp_rates_len = elen;
662 break;
663 case WLAN_EID_HT_CAPABILITY:
664 if (elen >= sizeof(struct ieee80211_ht_cap))
665 elems->ht_cap_elem = (void *)pos;
666 break;
667 case WLAN_EID_HT_INFORMATION:
668 if (elen >= sizeof(struct ieee80211_ht_info))
669 elems->ht_info_elem = (void *)pos;
670 break;
671 case WLAN_EID_MESH_ID:
672 elems->mesh_id = pos;
673 elems->mesh_id_len = elen;
674 break;
675 case WLAN_EID_MESH_CONFIG:
676 if (elen >= sizeof(struct ieee80211_meshconf_ie))
677 elems->mesh_config = (void *)pos;
678 break;
679 case WLAN_EID_PEER_MGMT:
680 elems->peering = pos;
681 elems->peering_len = elen;
682 break;
683 case WLAN_EID_PREQ:
684 elems->preq = pos;
685 elems->preq_len = elen;
686 break;
687 case WLAN_EID_PREP:
688 elems->prep = pos;
689 elems->prep_len = elen;
690 break;
691 case WLAN_EID_PERR:
692 elems->perr = pos;
693 elems->perr_len = elen;
694 break;
695 case WLAN_EID_RANN:
696 if (elen >= sizeof(struct ieee80211_rann_ie))
697 elems->rann = (void *)pos;
698 break;
699 case WLAN_EID_CHANNEL_SWITCH:
700 elems->ch_switch_elem = pos;
701 elems->ch_switch_elem_len = elen;
702 break;
703 case WLAN_EID_QUIET:
704 if (!elems->quiet_elem) {
705 elems->quiet_elem = pos;
706 elems->quiet_elem_len = elen;
707 }
708 elems->num_of_quiet_elem++;
709 break;
710 case WLAN_EID_COUNTRY:
711 elems->country_elem = pos;
712 elems->country_elem_len = elen;
713 break;
714 case WLAN_EID_PWR_CONSTRAINT:
715 elems->pwr_constr_elem = pos;
716 elems->pwr_constr_elem_len = elen;
717 break;
718 case WLAN_EID_TIMEOUT_INTERVAL:
719 elems->timeout_int = pos;
720 elems->timeout_int_len = elen;
721 break;
722 default:
723 break;
724 }
725
726 left -= elen;
727 pos += elen;
728 }
729
730 return crc;
731}
732
566void ieee802_11_parse_elems(u8 *start, size_t len, 733void ieee802_11_parse_elems(u8 *start, size_t len,
567 struct ieee802_11_elems *elems) 734 struct ieee802_11_elems *elems)
568{ 735{
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 2f178f73943f..a21dd3ad2b3a 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -6,7 +6,6 @@
6#include <linux/bitops.h> 6#include <linux/bitops.h>
7#include <linux/etherdevice.h> 7#include <linux/etherdevice.h>
8#include <linux/slab.h> 8#include <linux/slab.h>
9#include <linux/crc32.h>
10#include <net/cfg80211.h> 9#include <net/cfg80211.h>
11#include <net/ip.h> 10#include <net/ip.h>
12#include "core.h" 11#include "core.h"
@@ -1049,170 +1048,3 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1049 1048
1050 return 0; 1049 return 0;
1051} 1050}
1052
1053u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1054 struct ieee802_11_elems *elems,
1055 u64 filter, u32 crc)
1056{
1057 size_t left = len;
1058 u8 *pos = start;
1059 bool calc_crc = filter != 0;
1060
1061 memset(elems, 0, sizeof(*elems));
1062 elems->ie_start = start;
1063 elems->total_len = len;
1064
1065 while (left >= 2) {
1066 u8 id, elen;
1067
1068 id = *pos++;
1069 elen = *pos++;
1070 left -= 2;
1071
1072 if (elen > left)
1073 break;
1074
1075 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1076 crc = crc32_be(crc, pos - 2, elen + 2);
1077
1078 switch (id) {
1079 case WLAN_EID_SSID:
1080 elems->ssid = pos;
1081 elems->ssid_len = elen;
1082 break;
1083 case WLAN_EID_SUPP_RATES:
1084 elems->supp_rates = pos;
1085 elems->supp_rates_len = elen;
1086 break;
1087 case WLAN_EID_FH_PARAMS:
1088 elems->fh_params = pos;
1089 elems->fh_params_len = elen;
1090 break;
1091 case WLAN_EID_DS_PARAMS:
1092 elems->ds_params = pos;
1093 elems->ds_params_len = elen;
1094 break;
1095 case WLAN_EID_CF_PARAMS:
1096 elems->cf_params = pos;
1097 elems->cf_params_len = elen;
1098 break;
1099 case WLAN_EID_TIM:
1100 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1101 elems->tim = (void *)pos;
1102 elems->tim_len = elen;
1103 }
1104 break;
1105 case WLAN_EID_IBSS_PARAMS:
1106 elems->ibss_params = pos;
1107 elems->ibss_params_len = elen;
1108 break;
1109 case WLAN_EID_CHALLENGE:
1110 elems->challenge = pos;
1111 elems->challenge_len = elen;
1112 break;
1113 case WLAN_EID_VENDOR_SPECIFIC:
1114 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1115 pos[2] == 0xf2) {
1116 /* Microsoft OUI (00:50:F2) */
1117
1118 if (calc_crc)
1119 crc = crc32_be(crc, pos - 2, elen + 2);
1120
1121 if (pos[3] == 1) {
1122 /* OUI Type 1 - WPA IE */
1123 elems->wpa = pos;
1124 elems->wpa_len = elen;
1125 } else if (elen >= 5 && pos[3] == 2) {
1126 /* OUI Type 2 - WMM IE */
1127 if (pos[4] == 0) {
1128 elems->wmm_info = pos;
1129 elems->wmm_info_len = elen;
1130 } else if (pos[4] == 1) {
1131 elems->wmm_param = pos;
1132 elems->wmm_param_len = elen;
1133 }
1134 }
1135 }
1136 break;
1137 case WLAN_EID_RSN:
1138 elems->rsn = pos;
1139 elems->rsn_len = elen;
1140 break;
1141 case WLAN_EID_ERP_INFO:
1142 elems->erp_info = pos;
1143 elems->erp_info_len = elen;
1144 break;
1145 case WLAN_EID_EXT_SUPP_RATES:
1146 elems->ext_supp_rates = pos;
1147 elems->ext_supp_rates_len = elen;
1148 break;
1149 case WLAN_EID_HT_CAPABILITY:
1150 if (elen >= sizeof(struct ieee80211_ht_cap))
1151 elems->ht_cap_elem = (void *)pos;
1152 break;
1153 case WLAN_EID_HT_INFORMATION:
1154 if (elen >= sizeof(struct ieee80211_ht_info))
1155 elems->ht_info_elem = (void *)pos;
1156 break;
1157 case WLAN_EID_MESH_ID:
1158 elems->mesh_id = pos;
1159 elems->mesh_id_len = elen;
1160 break;
1161 case WLAN_EID_MESH_CONFIG:
1162 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1163 elems->mesh_config = (void *)pos;
1164 break;
1165 case WLAN_EID_PEER_MGMT:
1166 elems->peering = pos;
1167 elems->peering_len = elen;
1168 break;
1169 case WLAN_EID_PREQ:
1170 elems->preq = pos;
1171 elems->preq_len = elen;
1172 break;
1173 case WLAN_EID_PREP:
1174 elems->prep = pos;
1175 elems->prep_len = elen;
1176 break;
1177 case WLAN_EID_PERR:
1178 elems->perr = pos;
1179 elems->perr_len = elen;
1180 break;
1181 case WLAN_EID_RANN:
1182 if (elen >= sizeof(struct ieee80211_rann_ie))
1183 elems->rann = (void *)pos;
1184 break;
1185 case WLAN_EID_CHANNEL_SWITCH:
1186 elems->ch_switch_elem = pos;
1187 elems->ch_switch_elem_len = elen;
1188 break;
1189 case WLAN_EID_QUIET:
1190 if (!elems->quiet_elem) {
1191 elems->quiet_elem = pos;
1192 elems->quiet_elem_len = elen;
1193 }
1194 elems->num_of_quiet_elem++;
1195 break;
1196 case WLAN_EID_COUNTRY:
1197 elems->country_elem = pos;
1198 elems->country_elem_len = elen;
1199 break;
1200 case WLAN_EID_PWR_CONSTRAINT:
1201 elems->pwr_constr_elem = pos;
1202 elems->pwr_constr_elem_len = elen;
1203 break;
1204 case WLAN_EID_TIMEOUT_INTERVAL:
1205 elems->timeout_int = pos;
1206 elems->timeout_int_len = elen;
1207 break;
1208 default:
1209 break;
1210 }
1211
1212 left -= elen;
1213 pos += elen;
1214 }
1215
1216 return crc;
1217}
1218EXPORT_SYMBOL(ieee802_11_parse_elems_crc);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 07:41:03 -0500