/* Copyright 2021 The libwifi Authors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "../../core/frame/management/beacon.h" #include "../../core/frame/frame.h" #include "../../core/frame/tag.h" #include "../../core/frame/tag_iterator.h" #include "../../core/misc/types.h" #include "../../parse/misc/security.h" #include "beacon.h" #include "common.h" #include #include #include /** * libwifi_parse_beacon will parse useful fields out of a supplied beacon frame * in the format of a struct libwifi_frame. * * ┌─────────────────────────────────────────────┐ * │ Header (Ordered or Unordered) │ ── Beacon Header * ├─────────────────────────────────────────────┤ * │ Fixed Parameters │ ─┐ * ├─────────────────────────────────────────────┤ ├── Beacon Body * │ Tagged Parameters │ ─┘ * └─────────────────────────────────────────────┘ */ int libwifi_parse_beacon(struct libwifi_bss *bss, struct libwifi_frame *frame) { memset(bss, 0, sizeof(struct libwifi_bss)); if (frame->frame_control.type != TYPE_MANAGEMENT || frame->frame_control.subtype != SUBTYPE_BEACON) { return -EINVAL; } if (frame->frame_control.flags.ordered) { memcpy(bss->receiver, frame->header.mgmt_ordered.addr1, 6); memcpy(bss->transmitter, frame->header.mgmt_ordered.addr2, 6); memcpy(bss->bssid, frame->header.mgmt_ordered.addr3, 6); } else { memcpy(bss->receiver, frame->header.mgmt_unordered.addr1, 6); memcpy(bss->transmitter, frame->header.mgmt_unordered.addr2, 6); memcpy(bss->bssid, frame->header.mgmt_unordered.addr3, 6); } // Fixed Parameters must be present if (frame->len <= (frame->header_len + sizeof(struct libwifi_beacon_fixed_parameters))) { return -EINVAL; } // At least one Tagged Parameter must be present if (frame->len < (frame->header_len + sizeof(struct libwifi_beacon_fixed_parameters) + 2)) { return -EINVAL; } struct libwifi_beacon_fixed_parameters *fixed_params = (struct libwifi_beacon_fixed_parameters *) frame->body; if (libwifi_check_capabilities(fixed_params->capabilities_information, CAPABILITIES_PRIVACY)) { bss->encryption_info |= WEP; } bss->tags.length = (frame->len - (frame->header_len + sizeof(struct libwifi_beacon_fixed_parameters))); const unsigned char *tagged_params = frame->body + sizeof(struct libwifi_beacon_fixed_parameters); bss->tags.parameters = malloc(bss->tags.length); memcpy(bss->tags.parameters, tagged_params, bss->tags.length); // Iterate through common BSS tagged parameters (WPA, RSN, etc) struct libwifi_tag_iterator it; memset(&it, 0, sizeof(struct libwifi_tag_iterator)); if (libwifi_tag_iterator_init(&it, bss->tags.parameters, bss->tags.length) != 0) { return -EINVAL; } if (libwifi_bss_tag_parser(bss, &it) != 0) { return -EINVAL; }; return 0; } id='n10' href='#n10'>10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

connections {
  from_room: "Main Area"
  to_room: "Flipped Magenta Room"
  door { name: "Flipped Magenta Door" }
}
connections {
  from_room: "Main Area"
  to_room: "Flipped Yellow Room"
  door { name: "Flipped Yellow Door" }
}
connections {
  from_room: "Main Area"
  to_room: "C Keyholder"
  door { name: "C Keyholder Blocker" }
}
connections {
  from_room: "Main Area"
  to_room: "C2 Room"
  door { name: "C2 Door" }
}
connections {
  from_room: "Main Area"
  to_room: "Obverse Yellow Room"
  door { name: "Obverse Yellow Door" }
}
connections {
  from_room: "Obverse Yellow Room"
  to_room: "G Keyholder"
  door { name: "G Keyholder Blocker" }
}
connections {
  from_room: "Main Area"
  to_room: "G2 Room"
  door { name: "G2 Door" }
}
connections {
  from_room: "Main Area"
  to_room: "Obverse Magenta Room"
  door { name: "Obverse Magenta Door" }
}
connections {
  from_room: "Obverse Magenta Room"
  to_room: "T Keyholder"
  door { name: "T Keyholder Blocker" }
}