net/llc/llc_pdu.c

19 static u8 llc_pdu_get_pf_bit(struct llc_pdu_sn *pdu);
38 	struct llc_pdu_sn *pdu;
41 	pdu = llc_pdu_sn_hdr(skb);
46 		pdu->ctrl_2 = (pdu->ctrl_2 & 0xFE) | bit_value;
49 		pdu->ctrl_1 |= (pdu->ctrl_1 & 0xEF) | (bit_value << 4);
66 	struct llc_pdu_sn *pdu;
69 	pdu = llc_pdu_sn_hdr(skb);
74 		*pf_bit = pdu->ctrl_2 & LLC_S_PF_BIT_MASK;
77 		*pf_bit = (pdu->ctrl_1 & LLC_U_PF_BIT_MASK) >> 4;
87  *	Builds a pdu frame as a DISC command.
91 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
93 	pdu->ctrl_1  = LLC_PDU_TYPE_U;
94 	pdu->ctrl_1 |= LLC_2_PDU_CMD_DISC;
95 	pdu->ctrl_1 |= ((p_bit & 1) << 4) & LLC_U_PF_BIT_MASK;
99  *	llc_pdu_init_as_i_cmd - builds I pdu
105  *	Builds a pdu frame as an I command.
109 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
111 	pdu->ctrl_1  = LLC_PDU_TYPE_I;
112 	pdu->ctrl_2  = 0;
113 	pdu->ctrl_2 |= (p_bit & LLC_I_PF_BIT_MASK); /* p/f bit */
114 	pdu->ctrl_1 |= (ns << 1) & 0xFE;   /* set N(S) in bits 2..8 */
115 	pdu->ctrl_2 |= (nr << 1) & 0xFE;   /* set N(R) in bits 10..16 */
124  *	Builds a pdu frame as a REJ command.
128 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
130 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
131 	pdu->ctrl_1 |= LLC_2_PDU_CMD_REJ;
132 	pdu->ctrl_2  = 0;
133 	pdu->ctrl_2 |= p_bit & LLC_S_PF_BIT_MASK;
134 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
135 	pdu->ctrl_2 |= (nr << 1) & 0xFE; /* set N(R) in bits 10..16 */
139  *	llc_pdu_init_as_rnr_cmd - builds RNR pdu
144  *	Builds a pdu frame as an RNR command.
148 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
150 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
151 	pdu->ctrl_1 |= LLC_2_PDU_CMD_RNR;
152 	pdu->ctrl_2  = 0;
153 	pdu->ctrl_2 |= p_bit & LLC_S_PF_BIT_MASK;
154 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
155 	pdu->ctrl_2 |= (nr << 1) & 0xFE; /* set N(R) in bits 10..16 */
159  *	llc_pdu_init_as_rr_cmd - Builds RR pdu
164  *	Builds a pdu frame as an RR command.
168 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
170 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
171 	pdu->ctrl_1 |= LLC_2_PDU_CMD_RR;
172 	pdu->ctrl_2  = p_bit & LLC_S_PF_BIT_MASK;
173 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
174 	pdu->ctrl_2 |= (nr << 1) & 0xFE; /* set N(R) in bits 10..16 */
178  *	llc_pdu_init_as_sabme_cmd - builds SABME pdu
182  *	Builds a pdu frame as an SABME command.
186 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
188 	pdu->ctrl_1  = LLC_PDU_TYPE_U;
189 	pdu->ctrl_1 |= LLC_2_PDU_CMD_SABME;
190 	pdu->ctrl_1 |= ((p_bit & 1) << 4) & LLC_U_PF_BIT_MASK;
194  *	llc_pdu_init_as_dm_rsp - builds DM response pdu
198  *	Builds a pdu frame as a DM response.
202 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
204 	pdu->ctrl_1  = LLC_PDU_TYPE_U;
205 	pdu->ctrl_1 |= LLC_2_PDU_RSP_DM;
206 	pdu->ctrl_1 |= ((f_bit & 1) << 4) & LLC_U_PF_BIT_MASK;
218  *	Builds a pdu frame as a FRMR response.
226 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
228 	pdu->ctrl_1  = LLC_PDU_TYPE_U;
229 	pdu->ctrl_1 |= LLC_2_PDU_RSP_FRMR;
230 	pdu->ctrl_1 |= ((f_bit & 1) << 4) & LLC_U_PF_BIT_MASK;
232 	frmr_info = (struct llc_frmr_info *)&pdu->ctrl_2;
248  *	llc_pdu_init_as_rr_rsp - builds RR response pdu
253  *	Builds a pdu frame as an RR response.
257 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
259 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
260 	pdu->ctrl_1 |= LLC_2_PDU_RSP_RR;
261 	pdu->ctrl_2  = 0;
262 	pdu->ctrl_2 |= f_bit & LLC_S_PF_BIT_MASK;
263 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
264 	pdu->ctrl_2 |= (nr << 1) & 0xFE;  /* set N(R) in bits 10..16 */
268  *	llc_pdu_init_as_rej_rsp - builds REJ response pdu
273  *	Builds a pdu frame as a REJ response.
277 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
279 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
280 	pdu->ctrl_1 |= LLC_2_PDU_RSP_REJ;
281 	pdu->ctrl_2  = 0;
282 	pdu->ctrl_2 |= f_bit & LLC_S_PF_BIT_MASK;
283 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
284 	pdu->ctrl_2 |= (nr << 1) & 0xFE;  /* set N(R) in bits 10..16 */
288  *	llc_pdu_init_as_rnr_rsp - builds RNR response pdu
293  *	Builds a pdu frame as an RNR response.
297 	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
299 	pdu->ctrl_1  = LLC_PDU_TYPE_S;
300 	pdu->ctrl_1 |= LLC_2_PDU_RSP_RNR;
301 	pdu->ctrl_2  = 0;
302 	pdu->ctrl_2 |= f_bit & LLC_S_PF_BIT_MASK;
303 	pdu->ctrl_1 &= 0x0F;    /* setting bits 5..8 to zero(reserved) */
304 	pdu->ctrl_2 |= (nr << 1) & 0xFE;  /* set N(R) in bits 10..16 */
308  *	llc_pdu_init_as_ua_rsp - builds UA response pdu
312  *	Builds a pdu frame as a UA response.
316 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
318 	pdu->ctrl_1  = LLC_PDU_TYPE_U;
319 	pdu->ctrl_1 |= LLC_2_PDU_RSP_UA;
320 	pdu->ctrl_1 |= ((f_bit & 1) << 4) & LLC_U_PF_BIT_MASK;
332 	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
334 	if (pdu->ctrl_1 & 1) {
335 		if ((pdu->ctrl_1 & LLC_PDU_TYPE_U) == LLC_PDU_TYPE_U)
345  *	@pdu: pointer to LLC header.
350 static u8 llc_pdu_get_pf_bit(struct llc_pdu_sn *pdu)
355 	if (pdu->ctrl_1 & 1) {
356 		if ((pdu->ctrl_1 & LLC_PDU_TYPE_U) == LLC_PDU_TYPE_U)
365 		pf_bit = pdu->ctrl_2 & LLC_S_PF_BIT_MASK;
368 		pf_bit = (pdu->ctrl_1 & LLC_U_PF_BIT_MASK) >> 4;