18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * NDEF(NFC Data Exchange Format) routines for Wi-Fi Protected Setup 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Reference is "NFCForum-TS-NDEF_1.0 2006-07-24". 404949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * Copyright (c) 2009-2012, Masashi Honma <masashi.honma@gmail.com> 58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * This software may be distributed under the terms of the BSD license. 704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * See README for more details. 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wps/wps.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_MESSAGE_BEGIN (1 << 7) 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_MESSAGE_END (1 << 6) 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_CHUNK (1 << 5) 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_SHORT_RECORD (1 << 4) 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_ID_LENGTH_PRESENT (1 << 3) 19d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt#define FLAG_TNF_NFC_FORUM (0x01) 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define FLAG_TNF_RFC2046 (0x02) 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct ndef_record { 2304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const u8 *type; 2404949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const u8 *id; 2504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const u8 *payload; 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 type_length; 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id_length; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 payload_length; 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 total_length; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic char wifi_handover_type[] = "application/vnd.wfa.wsc"; 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3404949598a23f501be6eec21697465fd46a28840aDmitry Shmidtstatic int ndef_parse_record(const u8 *data, u32 size, 3504949598a23f501be6eec21697465fd46a28840aDmitry Shmidt struct ndef_record *record) 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const u8 *pos = data + 1; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (size < 2) 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->type_length = *pos++; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data[0] & FLAG_SHORT_RECORD) { 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (size < 3) 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->payload_length = *pos++; 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (size < 6) 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->payload_length = ntohl(*(u32 *)pos); 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += sizeof(u32); 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data[0] & FLAG_ID_LENGTH_PRESENT) { 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((int) size < pos - data + 1) 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->id_length = *pos++; 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->id_length = 0; 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->type = record->type_length == 0 ? NULL : pos; 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += record->type_length; 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->id = record->id_length == 0 ? NULL : pos; 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += record->id_length; 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->payload = record->payload_length == 0 ? NULL : pos; 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += record->payload_length; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record->total_length = pos - data; 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (record->total_length > size) 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7604949598a23f501be6eec21697465fd46a28840aDmitry Shmidtstatic struct wpabuf * ndef_parse_records(const struct wpabuf *buf, 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int (*filter)(struct ndef_record *)) 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ndef_record record; 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int len = wpabuf_len(buf); 8104949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const u8 *data = wpabuf_head(buf); 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt while (len > 0) { 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ndef_parse_record(data, len, &record) < 0) { 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "NDEF : Failed to parse"); 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (filter == NULL || filter(&record)) 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return wpabuf_alloc_copy(record.payload, 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record.payload_length); 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data += record.total_length; 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len -= record.total_length; 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "NDEF : Record not found"); 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * ndef_build_record(u8 flags, void *type, 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 type_length, void *id, 10104949598a23f501be6eec21697465fd46a28840aDmitry Shmidt u8 id_length, 10204949598a23f501be6eec21697465fd46a28840aDmitry Shmidt const struct wpabuf *payload) 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *record; 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t total_len; 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int short_record; 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 local_flag; 10804949598a23f501be6eec21697465fd46a28840aDmitry Shmidt size_t payload_length = wpabuf_len(payload); 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt short_record = payload_length < 256 ? 1 : 0; 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt total_len = 2; /* flag + type length */ 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* payload length */ 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt total_len += short_record ? sizeof(u8) : sizeof(u32); 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_length > 0) 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt total_len += 1; 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt total_len += type_length + id_length + payload_length; 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt record = wpabuf_alloc(total_len); 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (record == NULL) { 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "NDEF : Failed to allocate " 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "record for build"); 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt local_flag = flags; 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_length > 0) 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt local_flag |= FLAG_ID_LENGTH_PRESENT; 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (short_record) 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt local_flag |= FLAG_SHORT_RECORD; 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(record, local_flag); 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(record, type_length); 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (short_record) 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(record, payload_length); 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_be32(record, payload_length); 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_length > 0) 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(record, id_length); 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_data(record, type, type_length); 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_data(record, id, id_length); 14304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt wpabuf_put_buf(record, payload); 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return record; 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int wifi_filter(struct ndef_record *record) 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (record->type_length != os_strlen(wifi_handover_type)) 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_memcmp(record->type, wifi_handover_type, 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_strlen(wifi_handover_type)) != 0) 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 1; 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 15904949598a23f501be6eec21697465fd46a28840aDmitry Shmidtstruct wpabuf * ndef_parse_wifi(const struct wpabuf *buf) 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ndef_parse_records(buf, wifi_filter); 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 16504949598a23f501be6eec21697465fd46a28840aDmitry Shmidtstruct wpabuf * ndef_build_wifi(const struct wpabuf *buf) 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ndef_build_record(FLAG_MESSAGE_BEGIN | FLAG_MESSAGE_END | 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt FLAG_TNF_RFC2046, wifi_handover_type, 16904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt os_strlen(wifi_handover_type), NULL, 0, buf); 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 171d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 172d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 173f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidtstruct wpabuf * ndef_build_wifi_hc(int begin) 174f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt{ 175f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt struct wpabuf *hc, *carrier; 176f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt 177f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt carrier = wpabuf_alloc(2 + os_strlen(wifi_handover_type)); 178f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt if (carrier == NULL) 179f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt return NULL; 180f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt wpabuf_put_u8(carrier, 0x02); /* Carrier Type Format */ 181f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt wpabuf_put_u8(carrier, os_strlen(wifi_handover_type)); 182f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt wpabuf_put_str(carrier, wifi_handover_type); 183f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt 184f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt hc = ndef_build_record((begin ? FLAG_MESSAGE_BEGIN : 0) | 185f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt FLAG_MESSAGE_END | FLAG_TNF_NFC_FORUM, "Hc", 2, 186f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt "0", 1, carrier); 187f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt wpabuf_free(carrier); 188f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt 189f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt return hc; 190f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt} 191f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt 192f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt 193d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidtstruct wpabuf * ndef_build_wifi_hr(void) 194d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt{ 195d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt struct wpabuf *rn, *cr, *ac_payload, *ac, *hr_payload, *hr; 196f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt struct wpabuf *hc; 197d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 198d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt rn = wpabuf_alloc(2); 199d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (rn == NULL) 200d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 201d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_be16(rn, os_random() & 0xffff); 202d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 203d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt cr = ndef_build_record(FLAG_MESSAGE_BEGIN | FLAG_TNF_NFC_FORUM, "cr", 2, 204d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt NULL, 0, rn); 205d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(rn); 206d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 207d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (cr == NULL) 208d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 209d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 210d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt ac_payload = wpabuf_alloc(4); 211d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (ac_payload == NULL) { 212d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(cr); 213d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 214d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt } 215d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_u8(ac_payload, 0x01); /* Carrier Flags: CRS=1 "active" */ 216d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_u8(ac_payload, 0x01); /* Carrier Data Reference Length */ 217d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_u8(ac_payload, '0'); /* Carrier Data Reference: "0" */ 218d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_u8(ac_payload, 0); /* Aux Data Reference Count */ 219d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 220d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt ac = ndef_build_record(FLAG_MESSAGE_END | FLAG_TNF_NFC_FORUM, "ac", 2, 221d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt NULL, 0, ac_payload); 222d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(ac_payload); 223d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (ac == NULL) { 224d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(cr); 225d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 226d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt } 227d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 228d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt hr_payload = wpabuf_alloc(1 + wpabuf_len(cr) + wpabuf_len(ac)); 229d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (hr_payload == NULL) { 230d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(cr); 231d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(ac); 232d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 233d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt } 234d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 235d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_u8(hr_payload, 0x12); /* Connection Handover Version 1.2 */ 236d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_buf(hr_payload, cr); 237d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_put_buf(hr_payload, ac); 238d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(cr); 239d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(ac); 240d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 241d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt hr = ndef_build_record(FLAG_MESSAGE_BEGIN | FLAG_TNF_NFC_FORUM, "Hr", 2, 242d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt NULL, 0, hr_payload); 243d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(hr_payload); 244d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (hr == NULL) 245d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 246d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 247f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt hc = ndef_build_wifi_hc(0); 248d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt if (hc == NULL) { 249d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt wpabuf_free(hr); 250d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return NULL; 251d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt } 252d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt 253d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt return wpabuf_concat(hr, hc); 254d5e4923d04122f81300fa68fb07d64ede28fd44dDmitry Shmidt} 255