37 #define LLC_PDU_IS_GROUP_DSAP(pdu)      \  argument
38 	((pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1)
39 #define LLC_PDU_IS_INDIV_DSAP(pdu)      \  argument
40 	(!(pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1)
42 /* Command/response PDU indicator in SSAP field */
46 #define LLC_PDU_IS_CMD(pdu)    ((pdu->ssap & LLC_PDU_RSP) ? 0 : 1)  argument
47 #define LLC_PDU_IS_RSP(pdu)    ((pdu->ssap & LLC_PDU_RSP) ? 1 : 0)  argument
49 /* Get PDU type from 2 lowest-order bits of control field first byte */
60 #define LLC_PDU_TYPE_IS_I(pdu) \  argument
61 	((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 1 : 0)
63 #define LLC_PDU_TYPE_IS_U(pdu) \  argument
64 	(((pdu->ctrl_1 & LLC_PDU_TYPE_U_MASK) == LLC_PDU_TYPE_U) ? 1 : 0)
66 #define LLC_PDU_TYPE_IS_S(pdu) \  argument
67 	(((pdu->ctrl_1 & LLC_PDU_TYPE_S_MASK) == LLC_PDU_TYPE_S) ? 1 : 0)
69 /* U-format PDU control field masks */
71 #define LLC_U_PF_IS_1(pdu)     ((pdu->ctrl_1 & LLC_U_PF_BIT_MASK) ? 1 : 0)  argument
72 #define LLC_U_PF_IS_0(pdu)     ((!(pdu->ctrl_1 & LLC_U_PF_BIT_MASK)) ? 1 : 0)  argument
75 #define LLC_U_PDU_CMD(pdu)     (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK)  argument
76 #define LLC_U_PDU_RSP(pdu)     (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK)  argument
121 /* I-PDU masks ('ctrl' is I-PDU control word) */
122 #define LLC_I_GET_NS(pdu)     (u8)((pdu->ctrl_1 & 0xFE) >> 1)  argument
123 #define LLC_I_GET_NR(pdu)     (u8)((pdu->ctrl_2 & 0xFE) >> 1)  argument
127 #define LLC_I_PF_IS_0(pdu)     ((!(pdu->ctrl_2 & LLC_I_PF_BIT_MASK)) ? 1 : 0)  argument
128 #define LLC_I_PF_IS_1(pdu)     ((pdu->ctrl_2 & LLC_I_PF_BIT_MASK) ? 1 : 0)  argument
130 /* S-PDU supervisory commands and responses */
133 #define LLC_S_PDU_CMD(pdu)     (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK)  argument
134 #define LLC_S_PDU_RSP(pdu)     (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK)  argument
138 #define LLC_2_PDU_CMD_REJ      0x08	/* reject PDU cmd */
139 #define LLC_2_PDU_RSP_REJ      0x08	/* reject PDU rsp */
144 #define LLC_S_PF_IS_0(pdu)     ((!(pdu->ctrl_2 & LLC_S_PF_BIT_MASK)) ? 1 : 0)  argument
145 #define LLC_S_PF_IS_1(pdu)     ((pdu->ctrl_2 & LLC_S_PF_BIT_MASK) ? 1 : 0)  argument
147 #define PDU_SUPV_GET_Nr(pdu)   ((pdu->ctrl_2 & 0xFE) >> 1)  argument
156  * (if U-PDU) or word pointer to rejected PDU control field
198 /* Sequence-numbered PDU format (4 bytes in length) */
211 /* Un-numbered PDU format (3 bytes in length) */
224  *	llc_pdu_header_init - initializes pdu header
226  *	@type: type of PDU (U, I or S).
237 	struct llc_pdu_un *pdu;  in llc_pdu_header_init()  local
250 	pdu = llc_pdu_un_hdr(skb);  in llc_pdu_header_init()
251 	pdu->dsap = dsap;  in llc_pdu_header_init()
252 	pdu->ssap = ssap;  in llc_pdu_header_init()
253 	pdu->ssap |= cr;  in llc_pdu_header_init()
307  *	llc_pdu_init_as_ui_cmd - sets LLC header as UI PDU
310  *	This function sets third byte of LLC header as a UI PDU.
314 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);  in llc_pdu_init_as_ui_cmd()  local
316 	pdu->ctrl_1  = LLC_PDU_TYPE_U;  in llc_pdu_init_as_ui_cmd()
317 	pdu->ctrl_1 |= LLC_1_PDU_CMD_UI;  in llc_pdu_init_as_ui_cmd()
321  *	llc_pdu_init_as_test_cmd - sets PDU as TEST
324  * 	Sets a PDU as TEST
328 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);  in llc_pdu_init_as_test_cmd()  local
330 	pdu->ctrl_1  = LLC_PDU_TYPE_U;  in llc_pdu_init_as_test_cmd()
331 	pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST;  in llc_pdu_init_as_test_cmd()
332 	pdu->ctrl_1 |= LLC_U_PF_BIT_MASK;  in llc_pdu_init_as_test_cmd()
336  *	llc_pdu_init_as_test_rsp - build TEST response PDU
338  *	@ev_skb: The received TEST command PDU frame
340  *	Builds a pdu frame as a TEST response.
345 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);  in llc_pdu_init_as_test_rsp()  local
347 	pdu->ctrl_1  = LLC_PDU_TYPE_U;  in llc_pdu_init_as_test_rsp()
348 	pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST;  in llc_pdu_init_as_test_rsp()
349 	pdu->ctrl_1 |= LLC_U_PF_BIT_MASK;  in llc_pdu_init_as_test_rsp()
355 		memcpy(((u8 *)pdu) + 3, ((u8 *)ev_pdu) + 3, dsize);  in llc_pdu_init_as_test_rsp()
374  *	a XID PDU.
380 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);  in llc_pdu_init_as_xid_cmd()  local
382 	pdu->ctrl_1	 = LLC_PDU_TYPE_U;  in llc_pdu_init_as_xid_cmd()
383 	pdu->ctrl_1	|= LLC_1_PDU_CMD_XID;  in llc_pdu_init_as_xid_cmd()
384 	pdu->ctrl_1	|= LLC_U_PF_BIT_MASK;  in llc_pdu_init_as_xid_cmd()
385 	xid_info	 = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1);  in llc_pdu_init_as_xid_cmd()
396  *	llc_pdu_init_as_xid_rsp - builds XID response PDU
401  *	Builds a pdu frame as an XID response.
407 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);  in llc_pdu_init_as_xid_rsp()  local
409 	pdu->ctrl_1	 = LLC_PDU_TYPE_U;  in llc_pdu_init_as_xid_rsp()
410 	pdu->ctrl_1	|= LLC_1_PDU_CMD_XID;  in llc_pdu_init_as_xid_rsp()
411 	pdu->ctrl_1	|= LLC_U_PF_BIT_MASK;  in llc_pdu_init_as_xid_rsp()
413 	xid_info	 = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1);  in llc_pdu_init_as_xid_rsp()
422 	u16 rej_pdu_ctrl;	/* bits 1-8 if U-PDU */