llcp.h 6.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254
  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /*
  3. * Copyright (C) 2011 Intel Corporation. All rights reserved.
  4. */
  5. enum llcp_state {
  6. LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
  7. LLCP_CONNECTING,
  8. LLCP_DISCONNECTING,
  9. LLCP_CLOSED,
  10. LLCP_BOUND,
  11. LLCP_LISTEN,
  12. };
  13. #define LLCP_DEFAULT_LTO 100
  14. #define LLCP_DEFAULT_RW 1
  15. #define LLCP_DEFAULT_MIU 128
  16. #define LLCP_MAX_LTO 0xff
  17. #define LLCP_MAX_RW 15
  18. #define LLCP_MAX_MIUX 0x7ff
  19. #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)
  20. #define LLCP_WKS_NUM_SAP 16
  21. #define LLCP_SDP_NUM_SAP 16
  22. #define LLCP_LOCAL_NUM_SAP 32
  23. #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
  24. #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
  25. #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1)
  26. struct nfc_llcp_sock;
  27. struct llcp_sock_list {
  28. struct hlist_head head;
  29. rwlock_t lock;
  30. };
  31. struct nfc_llcp_sdp_tlv {
  32. u8 *tlv;
  33. u8 tlv_len;
  34. char *uri;
  35. u8 tid;
  36. u8 sap;
  37. unsigned long time;
  38. struct hlist_node node;
  39. };
  40. struct nfc_llcp_local {
  41. struct list_head list;
  42. struct nfc_dev *dev;
  43. struct kref ref;
  44. struct mutex sdp_lock;
  45. struct timer_list link_timer;
  46. struct sk_buff_head tx_queue;
  47. struct work_struct tx_work;
  48. struct work_struct rx_work;
  49. struct sk_buff *rx_pending;
  50. struct work_struct timeout_work;
  51. u32 target_idx;
  52. u8 rf_mode;
  53. u8 comm_mode;
  54. u8 lto;
  55. u8 rw;
  56. __be16 miux;
  57. unsigned long local_wks; /* Well known services */
  58. unsigned long local_sdp; /* Local services */
  59. unsigned long local_sap; /* Local SAPs, not available for discovery */
  60. atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];
  61. /* local */
  62. u8 gb[NFC_MAX_GT_LEN];
  63. u8 gb_len;
  64. /* remote */
  65. u8 remote_gb[NFC_MAX_GT_LEN];
  66. u8 remote_gb_len;
  67. u8 remote_version;
  68. u16 remote_miu;
  69. u16 remote_lto;
  70. u8 remote_opt;
  71. u16 remote_wks;
  72. struct mutex sdreq_lock;
  73. struct hlist_head pending_sdreqs;
  74. struct timer_list sdreq_timer;
  75. struct work_struct sdreq_timeout_work;
  76. u8 sdreq_next_tid;
  77. /* sockets array */
  78. struct llcp_sock_list sockets;
  79. struct llcp_sock_list connecting_sockets;
  80. struct llcp_sock_list raw_sockets;
  81. };
  82. struct nfc_llcp_sock {
  83. struct sock sk;
  84. struct nfc_dev *dev;
  85. struct nfc_llcp_local *local;
  86. u32 target_idx;
  87. u32 nfc_protocol;
  88. /* Link parameters */
  89. u8 ssap;
  90. u8 dsap;
  91. char *service_name;
  92. size_t service_name_len;
  93. u8 rw;
  94. __be16 miux;
  95. /* Remote link parameters */
  96. u8 remote_rw;
  97. u16 remote_miu;
  98. /* Link variables */
  99. u8 send_n;
  100. u8 send_ack_n;
  101. u8 recv_n;
  102. u8 recv_ack_n;
  103. /* Is the remote peer ready to receive */
  104. u8 remote_ready;
  105. /* Reserved source SAP */
  106. u8 reserved_ssap;
  107. struct sk_buff_head tx_queue;
  108. struct sk_buff_head tx_pending_queue;
  109. struct list_head accept_queue;
  110. struct sock *parent;
  111. };
  112. struct nfc_llcp_ui_cb {
  113. __u8 dsap;
  114. __u8 ssap;
  115. };
  116. #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
  117. #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
  118. #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
  119. #define LLCP_HEADER_SIZE 2
  120. #define LLCP_SEQUENCE_SIZE 1
  121. #define LLCP_AGF_PDU_HEADER_SIZE 2
  122. /* LLCP versions: 1.1 is 1.0 plus SDP */
  123. #define LLCP_VERSION_10 0x10
  124. #define LLCP_VERSION_11 0x11
  125. /* LLCP PDU types */
  126. #define LLCP_PDU_SYMM 0x0
  127. #define LLCP_PDU_PAX 0x1
  128. #define LLCP_PDU_AGF 0x2
  129. #define LLCP_PDU_UI 0x3
  130. #define LLCP_PDU_CONNECT 0x4
  131. #define LLCP_PDU_DISC 0x5
  132. #define LLCP_PDU_CC 0x6
  133. #define LLCP_PDU_DM 0x7
  134. #define LLCP_PDU_FRMR 0x8
  135. #define LLCP_PDU_SNL 0x9
  136. #define LLCP_PDU_I 0xc
  137. #define LLCP_PDU_RR 0xd
  138. #define LLCP_PDU_RNR 0xe
  139. /* Parameters TLV types */
  140. #define LLCP_TLV_VERSION 0x1
  141. #define LLCP_TLV_MIUX 0x2
  142. #define LLCP_TLV_WKS 0x3
  143. #define LLCP_TLV_LTO 0x4
  144. #define LLCP_TLV_RW 0x5
  145. #define LLCP_TLV_SN 0x6
  146. #define LLCP_TLV_OPT 0x7
  147. #define LLCP_TLV_SDREQ 0x8
  148. #define LLCP_TLV_SDRES 0x9
  149. #define LLCP_TLV_MAX 0xa
  150. /* Well known LLCP SAP */
  151. #define LLCP_SAP_SDP 0x1
  152. #define LLCP_SAP_IP 0x2
  153. #define LLCP_SAP_OBEX 0x3
  154. #define LLCP_SAP_SNEP 0x4
  155. #define LLCP_SAP_MAX 0xff
  156. /* Disconnection reason code */
  157. #define LLCP_DM_DISC 0x00
  158. #define LLCP_DM_NOCONN 0x01
  159. #define LLCP_DM_NOBOUND 0x02
  160. #define LLCP_DM_REJ 0x03
  161. void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
  162. void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
  163. void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
  164. struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
  165. struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
  166. int nfc_llcp_local_put(struct nfc_llcp_local *local);
  167. u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
  168. struct nfc_llcp_sock *sock);
  169. u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
  170. void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
  171. int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
  172. void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
  173. struct sk_buff *skb, u8 direction);
  174. /* Sock API */
  175. struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern);
  176. void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
  177. void nfc_llcp_accept_unlink(struct sock *sk);
  178. void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
  179. struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);
  180. /* TLV API */
  181. int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
  182. u8 *tlv_array, u16 tlv_array_len);
  183. int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
  184. u8 *tlv_array, u16 tlv_array_len);
  185. /* Commands API */
  186. void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
  187. u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
  188. struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
  189. struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
  190. size_t uri_len);
  191. void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
  192. void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
  193. void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
  194. int nfc_llcp_send_symm(struct nfc_dev *dev);
  195. int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
  196. int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
  197. int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
  198. struct hlist_head *tlv_list, size_t tlvs_len);
  199. int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
  200. struct hlist_head *tlv_list, size_t tlvs_len);
  201. int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
  202. int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
  203. int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
  204. struct msghdr *msg, size_t len);
  205. int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
  206. struct msghdr *msg, size_t len);
  207. int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
  208. /* Socket API */
  209. int __init nfc_llcp_sock_init(void);
  210. void nfc_llcp_sock_exit(void);