wnm_sta.c 6.9 KB

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  1. /*
  2. * wpa_supplicant - WNM
  3. * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
  4. *
  5. * This software may be distributed under the terms of the BSD license.
  6. * See README for more details.
  7. */
  8. #include "utils/includes.h"
  9. #include "utils/common.h"
  10. #include "common/ieee802_11_defs.h"
  11. #include "rsn_supp/wpa.h"
  12. #include "../wpa_supplicant/wpa_supplicant_i.h"
  13. #include "../wpa_supplicant/driver_i.h"
  14. #define MAX_TFS_IE_LEN 1024
  15. #ifdef CONFIG_IEEE80211V
  16. /* get the TFS IE from driver */
  17. static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
  18. u16 *buf_len, enum wnm_oper oper)
  19. {
  20. wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
  21. return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
  22. }
  23. /* set the TFS IE to driver */
  24. static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
  25. const u8 *addr, u8 *buf, u16 *buf_len,
  26. enum wnm_oper oper)
  27. {
  28. wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
  29. return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
  30. }
  31. /* MLME-SLEEPMODE.request */
  32. int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
  33. u8 action, u8 intval)
  34. {
  35. struct ieee80211_mgmt *mgmt;
  36. int res;
  37. size_t len;
  38. struct wnm_sleep_element *wnmsleep_ie;
  39. u8 *wnmtfs_ie;
  40. u8 wnmsleep_ie_len;
  41. u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
  42. enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
  43. WNM_SLEEP_TFS_REQ_IE_NONE;
  44. /* WNM-Sleep Mode IE */
  45. wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
  46. wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
  47. if (wnmsleep_ie == NULL)
  48. return -1;
  49. wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
  50. wnmsleep_ie->len = wnmsleep_ie_len - 2;
  51. wnmsleep_ie->action_type = action;
  52. wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
  53. wnmsleep_ie->intval = intval;
  54. /* TFS IE(s) */
  55. wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
  56. if (wnmtfs_ie == NULL) {
  57. os_free(wnmsleep_ie);
  58. return -1;
  59. }
  60. if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
  61. tfs_oper)) {
  62. wnmtfs_ie_len = 0;
  63. os_free(wnmtfs_ie);
  64. wnmtfs_ie = NULL;
  65. }
  66. mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
  67. if (mgmt == NULL) {
  68. wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
  69. "WNM-Sleep Request action frame");
  70. return -1;
  71. }
  72. os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
  73. os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
  74. os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
  75. mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
  76. WLAN_FC_STYPE_ACTION);
  77. mgmt->u.action.category = WLAN_ACTION_WNM;
  78. mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
  79. os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
  80. wnmsleep_ie_len);
  81. /* copy TFS IE here */
  82. if (wnmtfs_ie_len > 0) {
  83. os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
  84. wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
  85. }
  86. len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
  87. wnmtfs_ie_len;
  88. res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
  89. wpa_s->own_addr, wpa_s->bssid,
  90. &mgmt->u.action.category, len, 0);
  91. if (res < 0)
  92. wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
  93. "(action=%d, intval=%d)", action, intval);
  94. os_free(wnmsleep_ie);
  95. os_free(wnmtfs_ie);
  96. os_free(mgmt);
  97. return res;
  98. }
  99. static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
  100. const u8 *frm, int len)
  101. {
  102. /*
  103. * Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data |
  104. * WNM-Sleep Mode IE | TFS Response IE
  105. */
  106. u8 *pos = (u8 *) frm; /* point to action field */
  107. u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
  108. u8 gtk_len;
  109. #ifdef CONFIG_IEEE80211W
  110. u8 igtk_len;
  111. #endif /* CONFIG_IEEE80211W */
  112. struct wnm_sleep_element *wnmsleep_ie = NULL;
  113. /* multiple TFS Resp IE (assuming consecutive) */
  114. u8 *tfsresp_ie_start = NULL;
  115. u8 *tfsresp_ie_end = NULL;
  116. u16 tfsresp_ie_len = 0;
  117. wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
  118. frm[0], frm[1], key_len_total);
  119. pos += 4 + key_len_total;
  120. while (pos - frm < len) {
  121. u8 ie_len = *(pos + 1);
  122. if (*pos == WLAN_EID_WNMSLEEP)
  123. wnmsleep_ie = (struct wnm_sleep_element *) pos;
  124. else if (*pos == WLAN_EID_TFS_RESP) {
  125. if (!tfsresp_ie_start)
  126. tfsresp_ie_start = pos;
  127. tfsresp_ie_end = pos;
  128. } else
  129. wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
  130. pos += ie_len + 2;
  131. }
  132. if (!wnmsleep_ie) {
  133. wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
  134. return;
  135. }
  136. if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT) {
  137. wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
  138. "frame (action=%d, intval=%d)",
  139. wnmsleep_ie->action_type, wnmsleep_ie->intval);
  140. if (wnmsleep_ie->action_type == 0) {
  141. wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
  142. wpa_s->bssid, NULL, NULL);
  143. /* remove GTK/IGTK ?? */
  144. /* set the TFS Resp IE(s) */
  145. if (tfsresp_ie_start && tfsresp_ie_end &&
  146. tfsresp_ie_end - tfsresp_ie_start >= 0) {
  147. tfsresp_ie_len = (tfsresp_ie_end +
  148. tfsresp_ie_end[1] + 2) -
  149. tfsresp_ie_start;
  150. wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
  151. /*
  152. * pass the TFS Resp IE(s) to driver for
  153. * processing
  154. */
  155. if (ieee80211_11_set_tfs_ie(
  156. wpa_s, wpa_s->bssid,
  157. tfsresp_ie_start,
  158. &tfsresp_ie_len,
  159. WNM_SLEEP_TFS_RESP_IE_SET))
  160. wpa_printf(MSG_DEBUG, "Fail to set "
  161. "TFS Resp IE");
  162. }
  163. } else if (wnmsleep_ie->action_type == 1) {
  164. wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,
  165. wpa_s->bssid, NULL, NULL);
  166. /* Install GTK/IGTK */
  167. do {
  168. /* point to key data field */
  169. u8 *ptr = (u8 *) frm + 1 + 1 + 2;
  170. while (ptr < (u8 *) frm + 4 + key_len_total) {
  171. if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
  172. gtk_len = *(ptr + 4);
  173. wpa_wnmsleep_install_key(
  174. wpa_s->wpa,
  175. WNM_SLEEP_SUBELEM_GTK,
  176. ptr);
  177. ptr += 13 + gtk_len;
  178. #ifdef CONFIG_IEEE80211W
  179. } else if (*ptr ==
  180. WNM_SLEEP_SUBELEM_IGTK) {
  181. igtk_len = WPA_IGTK_LEN;
  182. wpa_wnmsleep_install_key(
  183. wpa_s->wpa,
  184. WNM_SLEEP_SUBELEM_IGTK,
  185. ptr);
  186. ptr += 10 + WPA_IGTK_LEN;
  187. #endif /* CONFIG_IEEE80211W */
  188. } else
  189. break; /* skip the loop */
  190. }
  191. } while(0);
  192. }
  193. } else {
  194. wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
  195. "(action=%d, intval=%d)",
  196. wnmsleep_ie->action_type, wnmsleep_ie->intval);
  197. if (wnmsleep_ie->action_type == 0)
  198. wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
  199. wpa_s->bssid, NULL, NULL);
  200. else if (wnmsleep_ie->action_type == 1)
  201. wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
  202. wpa_s->bssid, NULL, NULL);
  203. }
  204. }
  205. void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
  206. struct rx_action *action)
  207. {
  208. u8 *pos = (u8 *) action->data; /* point to action field */
  209. u8 act = *pos++;
  210. /* u8 dialog_token = *pos++; */
  211. switch (act) {
  212. case WNM_SLEEP_MODE_RESP:
  213. ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);
  214. break;
  215. default:
  216. break;
  217. }
  218. }
  219. #endif /* CONFIG_IEEE80211V */