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1da177e4 LT |
1 | #ifndef LLC_PDU_H |
2 | #define LLC_PDU_H | |
3 | /* | |
4 | * Copyright (c) 1997 by Procom Technology,Inc. | |
5 | * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
6 | * | |
7 | * This program can be redistributed or modified under the terms of the | |
8 | * GNU General Public License as published by the Free Software Foundation. | |
9 | * This program is distributed without any warranty or implied warranty | |
10 | * of merchantability or fitness for a particular purpose. | |
11 | * | |
12 | * See the GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <linux/if_ether.h> | |
16 | #include <linux/if_tr.h> | |
17 | ||
18 | /* Lengths of frame formats */ | |
19 | #define LLC_PDU_LEN_I 4 /* header and 2 control bytes */ | |
20 | #define LLC_PDU_LEN_S 4 | |
21 | #define LLC_PDU_LEN_U 3 /* header and 1 control byte */ | |
22 | /* Known SAP addresses */ | |
23 | #define LLC_GLOBAL_SAP 0xFF | |
24 | #define LLC_NULL_SAP 0x00 /* not network-layer visible */ | |
25 | #define LLC_MGMT_INDIV 0x02 /* station LLC mgmt indiv addr */ | |
26 | #define LLC_MGMT_GRP 0x03 /* station LLC mgmt group addr */ | |
27 | #define LLC_RDE_SAP 0xA6 /* route ... */ | |
28 | ||
29 | /* SAP field bit masks */ | |
30 | #define LLC_ISO_RESERVED_SAP 0x02 | |
31 | #define LLC_SAP_GROUP_DSAP 0x01 | |
32 | #define LLC_SAP_RESP_SSAP 0x01 | |
33 | ||
34 | /* Group/individual DSAP indicator is DSAP field */ | |
35 | #define LLC_PDU_GROUP_DSAP_MASK 0x01 | |
36 | #define LLC_PDU_IS_GROUP_DSAP(pdu) \ | |
37 | ((pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1) | |
38 | #define LLC_PDU_IS_INDIV_DSAP(pdu) \ | |
39 | (!(pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1) | |
40 | ||
41 | /* Command/response PDU indicator in SSAP field */ | |
42 | #define LLC_PDU_CMD_RSP_MASK 0x01 | |
43 | #define LLC_PDU_CMD 0 | |
44 | #define LLC_PDU_RSP 1 | |
45 | #define LLC_PDU_IS_CMD(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 0 : 1) | |
46 | #define LLC_PDU_IS_RSP(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 1 : 0) | |
47 | ||
48 | /* Get PDU type from 2 lowest-order bits of control field first byte */ | |
49 | #define LLC_PDU_TYPE_I_MASK 0x01 /* 16-bit control field */ | |
50 | #define LLC_PDU_TYPE_S_MASK 0x03 | |
51 | #define LLC_PDU_TYPE_U_MASK 0x03 /* 8-bit control field */ | |
52 | #define LLC_PDU_TYPE_MASK 0x03 | |
53 | ||
54 | #define LLC_PDU_TYPE_I 0 /* first bit */ | |
55 | #define LLC_PDU_TYPE_S 1 /* first two bits */ | |
56 | #define LLC_PDU_TYPE_U 3 /* first two bits */ | |
57 | ||
58 | #define LLC_PDU_TYPE_IS_I(pdu) \ | |
59 | ((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 1 : 0) | |
60 | ||
61 | #define LLC_PDU_TYPE_IS_U(pdu) \ | |
62 | (((pdu->ctrl_1 & LLC_PDU_TYPE_U_MASK) == LLC_PDU_TYPE_U) ? 1 : 0) | |
63 | ||
64 | #define LLC_PDU_TYPE_IS_S(pdu) \ | |
65 | (((pdu->ctrl_1 & LLC_PDU_TYPE_S_MASK) == LLC_PDU_TYPE_S) ? 1 : 0) | |
66 | ||
67 | /* U-format PDU control field masks */ | |
68 | #define LLC_U_PF_BIT_MASK 0x10 /* P/F bit mask */ | |
69 | #define LLC_U_PF_IS_1(pdu) ((pdu->ctrl_1 & LLC_U_PF_BIT_MASK) ? 1 : 0) | |
70 | #define LLC_U_PF_IS_0(pdu) ((!(pdu->ctrl_1 & LLC_U_PF_BIT_MASK)) ? 1 : 0) | |
71 | ||
72 | #define LLC_U_PDU_CMD_MASK 0xEC /* cmd/rsp mask */ | |
73 | #define LLC_U_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK) | |
74 | #define LLC_U_PDU_RSP(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK) | |
75 | ||
76 | #define LLC_1_PDU_CMD_UI 0x00 /* Type 1 cmds/rsps */ | |
77 | #define LLC_1_PDU_CMD_XID 0xAC | |
78 | #define LLC_1_PDU_CMD_TEST 0xE0 | |
79 | ||
80 | #define LLC_2_PDU_CMD_SABME 0x6C /* Type 2 cmds/rsps */ | |
81 | #define LLC_2_PDU_CMD_DISC 0x40 | |
82 | #define LLC_2_PDU_RSP_UA 0x60 | |
83 | #define LLC_2_PDU_RSP_DM 0x0C | |
84 | #define LLC_2_PDU_RSP_FRMR 0x84 | |
85 | ||
86 | /* Type 1 operations */ | |
87 | ||
88 | /* XID information field bit masks */ | |
89 | ||
90 | /* LLC format identifier (byte 1) */ | |
91 | #define LLC_XID_FMT_ID 0x81 /* first byte must be this */ | |
92 | ||
93 | /* LLC types/classes identifier (byte 2) */ | |
94 | #define LLC_XID_CLASS_ZEROS_MASK 0xE0 /* these must be zeros */ | |
95 | #define LLC_XID_CLASS_MASK 0x1F /* AND with byte to get below */ | |
96 | ||
97 | #define LLC_XID_NULL_CLASS_1 0x01 /* if NULL LSAP...use these */ | |
98 | #define LLC_XID_NULL_CLASS_2 0x03 | |
99 | #define LLC_XID_NULL_CLASS_3 0x05 | |
100 | #define LLC_XID_NULL_CLASS_4 0x07 | |
101 | ||
102 | #define LLC_XID_NNULL_TYPE_1 0x01 /* if non-NULL LSAP...use these */ | |
103 | #define LLC_XID_NNULL_TYPE_2 0x02 | |
104 | #define LLC_XID_NNULL_TYPE_3 0x04 | |
105 | #define LLC_XID_NNULL_TYPE_1_2 0x03 | |
106 | #define LLC_XID_NNULL_TYPE_1_3 0x05 | |
107 | #define LLC_XID_NNULL_TYPE_2_3 0x06 | |
108 | #define LLC_XID_NNULL_ALL 0x07 | |
109 | ||
110 | /* Sender Receive Window (byte 3) */ | |
111 | #define LLC_XID_RW_MASK 0xFE /* AND with value to get below */ | |
112 | ||
113 | #define LLC_XID_MIN_RW 0x02 /* lowest-order bit always zero */ | |
114 | ||
115 | /* Type 2 operations */ | |
116 | ||
117 | #define LLC_2_SEQ_NBR_MODULO ((u8) 128) | |
118 | ||
119 | /* I-PDU masks ('ctrl' is I-PDU control word) */ | |
120 | #define LLC_I_GET_NS(pdu) (u8)((pdu->ctrl_1 & 0xFE) >> 1) | |
121 | #define LLC_I_GET_NR(pdu) (u8)((pdu->ctrl_2 & 0xFE) >> 1) | |
122 | ||
123 | #define LLC_I_PF_BIT_MASK 0x01 | |
124 | ||
125 | #define LLC_I_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_I_PF_BIT_MASK)) ? 1 : 0) | |
126 | #define LLC_I_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_I_PF_BIT_MASK) ? 1 : 0) | |
127 | ||
128 | /* S-PDU supervisory commands and responses */ | |
129 | ||
130 | #define LLC_S_PDU_CMD_MASK 0x0C | |
131 | #define LLC_S_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK) | |
132 | #define LLC_S_PDU_RSP(pdu) (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK) | |
133 | ||
134 | #define LLC_2_PDU_CMD_RR 0x00 /* rx ready cmd */ | |
135 | #define LLC_2_PDU_RSP_RR 0x00 /* rx ready rsp */ | |
136 | #define LLC_2_PDU_CMD_REJ 0x08 /* reject PDU cmd */ | |
137 | #define LLC_2_PDU_RSP_REJ 0x08 /* reject PDU rsp */ | |
138 | #define LLC_2_PDU_CMD_RNR 0x04 /* rx not ready cmd */ | |
139 | #define LLC_2_PDU_RSP_RNR 0x04 /* rx not ready rsp */ | |
140 | ||
141 | #define LLC_S_PF_BIT_MASK 0x01 | |
142 | #define LLC_S_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_S_PF_BIT_MASK)) ? 1 : 0) | |
143 | #define LLC_S_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_S_PF_BIT_MASK) ? 1 : 0) | |
144 | ||
145 | #define PDU_SUPV_GET_Nr(pdu) ((pdu->ctrl_2 & 0xFE) >> 1) | |
146 | #define PDU_GET_NEXT_Vr(sn) (++sn & ~LLC_2_SEQ_NBR_MODULO) | |
147 | ||
148 | /* FRMR information field macros */ | |
149 | ||
150 | #define FRMR_INFO_LENGTH 5 /* 5 bytes of information */ | |
151 | ||
152 | /* | |
153 | * info is pointer to FRMR info field structure; 'rej_ctrl' is byte pointer | |
154 | * (if U-PDU) or word pointer to rejected PDU control field | |
155 | */ | |
156 | #define FRMR_INFO_SET_REJ_CNTRL(info,rej_ctrl) \ | |
157 | info->rej_pdu_ctrl = ((*((u8 *) rej_ctrl) & \ | |
158 | LLC_PDU_TYPE_U) != LLC_PDU_TYPE_U ? \ | |
159 | (u16)*((u16 *) rej_ctrl) : \ | |
160 | (((u16) *((u8 *) rej_ctrl)) & 0x00FF)) | |
161 | ||
162 | /* | |
163 | * Info is pointer to FRMR info field structure; 'vs' is a byte containing | |
164 | * send state variable value in low-order 7 bits (insure the lowest-order | |
165 | * bit remains zero (0)) | |
166 | */ | |
167 | #define FRMR_INFO_SET_Vs(info,vs) (info->curr_ssv = (((u8) vs) << 1)) | |
168 | #define FRMR_INFO_SET_Vr(info,vr) (info->curr_rsv = (((u8) vr) << 1)) | |
169 | ||
170 | /* | |
171 | * Info is pointer to FRMR info field structure; 'cr' is a byte containing | |
172 | * the C/R bit value in the low-order bit | |
173 | */ | |
174 | #define FRMR_INFO_SET_C_R_BIT(info, cr) (info->curr_rsv |= (((u8) cr) & 0x01)) | |
175 | ||
176 | /* | |
177 | * In the remaining five macros, 'info' is pointer to FRMR info field | |
178 | * structure; 'ind' is a byte containing the bit value to set in the | |
179 | * lowest-order bit) | |
180 | */ | |
181 | #define FRMR_INFO_SET_INVALID_PDU_CTRL_IND(info, ind) \ | |
182 | (info->ind_bits = ((info->ind_bits & 0xFE) | (((u8) ind) & 0x01))) | |
183 | ||
184 | #define FRMR_INFO_SET_INVALID_PDU_INFO_IND(info, ind) \ | |
185 | (info->ind_bits = ( (info->ind_bits & 0xFD) | (((u8) ind) & 0x02))) | |
186 | ||
187 | #define FRMR_INFO_SET_PDU_INFO_2LONG_IND(info, ind) \ | |
188 | (info->ind_bits = ( (info->ind_bits & 0xFB) | (((u8) ind) & 0x04))) | |
189 | ||
190 | #define FRMR_INFO_SET_PDU_INVALID_Nr_IND(info, ind) \ | |
191 | (info->ind_bits = ( (info->ind_bits & 0xF7) | (((u8) ind) & 0x08))) | |
192 | ||
193 | #define FRMR_INFO_SET_PDU_INVALID_Ns_IND(info, ind) \ | |
194 | (info->ind_bits = ( (info->ind_bits & 0xEF) | (((u8) ind) & 0x10))) | |
195 | ||
196 | /* Sequence-numbered PDU format (4 bytes in length) */ | |
197 | struct llc_pdu_sn { | |
198 | u8 dsap; | |
199 | u8 ssap; | |
200 | u8 ctrl_1; | |
201 | u8 ctrl_2; | |
202 | }; | |
203 | ||
204 | static inline struct llc_pdu_sn *llc_pdu_sn_hdr(struct sk_buff *skb) | |
205 | { | |
206 | return (struct llc_pdu_sn *)skb->nh.raw; | |
207 | } | |
208 | ||
209 | /* Un-numbered PDU format (3 bytes in length) */ | |
210 | struct llc_pdu_un { | |
211 | u8 dsap; | |
212 | u8 ssap; | |
213 | u8 ctrl_1; | |
214 | }; | |
215 | ||
216 | static inline struct llc_pdu_un *llc_pdu_un_hdr(struct sk_buff *skb) | |
217 | { | |
218 | return (struct llc_pdu_un *)skb->nh.raw; | |
219 | } | |
220 | ||
221 | static inline void *llc_set_pdu_hdr(struct sk_buff *skb, void *ptr) | |
222 | { | |
223 | return skb->nh.raw = ptr; | |
224 | } | |
225 | ||
226 | /** | |
227 | * llc_pdu_header_init - initializes pdu header | |
228 | * @skb: input skb that header must be set into it. | |
229 | * @type: type of PDU (U, I or S). | |
230 | * @ssap: source sap. | |
231 | * @dsap: destination sap. | |
232 | * @cr: command/response bit (0 or 1). | |
233 | * | |
234 | * This function sets DSAP, SSAP and command/Response bit in LLC header. | |
235 | */ | |
236 | static inline void llc_pdu_header_init(struct sk_buff *skb, u8 type, | |
237 | u8 ssap, u8 dsap, u8 cr) | |
238 | { | |
239 | const int hlen = type == LLC_PDU_TYPE_U ? 3 : 4; | |
240 | struct llc_pdu_un *pdu = llc_set_pdu_hdr(skb, skb_push(skb, hlen)); | |
241 | pdu->dsap = dsap; | |
242 | pdu->ssap = ssap; | |
243 | pdu->ssap |= cr; | |
244 | } | |
245 | ||
246 | /** | |
247 | * llc_pdu_decode_sa - extracs source address (MAC) of input frame | |
248 | * @skb: input skb that source address must be extracted from it. | |
249 | * @sa: pointer to source address (6 byte array). | |
250 | * | |
251 | * This function extracts source address(MAC) of input frame. | |
252 | */ | |
253 | static inline void llc_pdu_decode_sa(struct sk_buff *skb, u8 *sa) | |
254 | { | |
3fbd418a | 255 | if (skb->protocol == htons(ETH_P_802_2)) |
1da177e4 | 256 | memcpy(sa, eth_hdr(skb)->h_source, ETH_ALEN); |
3fbd418a | 257 | else if (skb->protocol == htons(ETH_P_TR_802_2)) { |
1da177e4 | 258 | memcpy(sa, tr_hdr(skb)->saddr, ETH_ALEN); |
5ed688a7 JF |
259 | *sa &= 0x7F; |
260 | } | |
1da177e4 LT |
261 | } |
262 | ||
263 | /** | |
264 | * llc_pdu_decode_da - extracts dest address of input frame | |
265 | * @skb: input skb that destination address must be extracted from it | |
266 | * @sa: pointer to destination address (6 byte array). | |
267 | * | |
268 | * This function extracts destination address(MAC) of input frame. | |
269 | */ | |
270 | static inline void llc_pdu_decode_da(struct sk_buff *skb, u8 *da) | |
271 | { | |
3fbd418a | 272 | if (skb->protocol == htons(ETH_P_802_2)) |
1da177e4 | 273 | memcpy(da, eth_hdr(skb)->h_dest, ETH_ALEN); |
3fbd418a | 274 | else if (skb->protocol == htons(ETH_P_TR_802_2)) |
1da177e4 LT |
275 | memcpy(da, tr_hdr(skb)->daddr, ETH_ALEN); |
276 | } | |
277 | ||
278 | /** | |
279 | * llc_pdu_decode_ssap - extracts source SAP of input frame | |
280 | * @skb: input skb that source SAP must be extracted from it. | |
281 | * @ssap: source SAP (output argument). | |
282 | * | |
283 | * This function extracts source SAP of input frame. Right bit of SSAP is | |
284 | * command/response bit. | |
285 | */ | |
286 | static inline void llc_pdu_decode_ssap(struct sk_buff *skb, u8 *ssap) | |
287 | { | |
288 | *ssap = llc_pdu_un_hdr(skb)->ssap & 0xFE; | |
289 | } | |
290 | ||
291 | /** | |
292 | * llc_pdu_decode_dsap - extracts dest SAP of input frame | |
293 | * @skb: input skb that destination SAP must be extracted from it. | |
294 | * @dsap: destination SAP (output argument). | |
295 | * | |
296 | * This function extracts destination SAP of input frame. right bit of | |
297 | * DSAP designates individual/group SAP. | |
298 | */ | |
299 | static inline void llc_pdu_decode_dsap(struct sk_buff *skb, u8 *dsap) | |
300 | { | |
301 | *dsap = llc_pdu_un_hdr(skb)->dsap & 0xFE; | |
302 | } | |
303 | ||
304 | /** | |
305 | * llc_pdu_init_as_ui_cmd - sets LLC header as UI PDU | |
306 | * @skb: input skb that header must be set into it. | |
307 | * | |
308 | * This function sets third byte of LLC header as a UI PDU. | |
309 | */ | |
310 | static inline void llc_pdu_init_as_ui_cmd(struct sk_buff *skb) | |
311 | { | |
312 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
313 | ||
314 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
315 | pdu->ctrl_1 |= LLC_1_PDU_CMD_UI; | |
316 | } | |
317 | ||
318 | /** | |
319 | * llc_pdu_init_as_test_cmd - sets PDU as TEST | |
320 | * @skb - Address of the skb to build | |
321 | * | |
322 | * Sets a PDU as TEST | |
323 | */ | |
324 | static inline void llc_pdu_init_as_test_cmd(struct sk_buff *skb) | |
325 | { | |
326 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
327 | ||
328 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
329 | pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST; | |
330 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
331 | } | |
332 | ||
333 | /** | |
334 | * llc_pdu_init_as_test_rsp - build TEST response PDU | |
335 | * @skb: Address of the skb to build | |
336 | * @ev_skb: The received TEST command PDU frame | |
337 | * | |
338 | * Builds a pdu frame as a TEST response. | |
339 | */ | |
340 | static inline void llc_pdu_init_as_test_rsp(struct sk_buff *skb, | |
341 | struct sk_buff *ev_skb) | |
342 | { | |
343 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
344 | ||
345 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
346 | pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST; | |
347 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
3fbd418a | 348 | if (ev_skb->protocol == htons(ETH_P_802_2)) { |
1da177e4 LT |
349 | struct llc_pdu_un *ev_pdu = llc_pdu_un_hdr(ev_skb); |
350 | int dsize; | |
351 | ||
352 | dsize = ntohs(eth_hdr(ev_skb)->h_proto) - 3; | |
353 | memcpy(((u8 *)pdu) + 3, ((u8 *)ev_pdu) + 3, dsize); | |
354 | skb_put(skb, dsize); | |
355 | } | |
356 | } | |
357 | ||
358 | /* LLC Type 1 XID command/response information fields format */ | |
359 | struct llc_xid_info { | |
cf225356 | 360 | u8 fmt_id; /* always 0x81 for LLC */ |
1da177e4 LT |
361 | u8 type; /* different if NULL/non-NULL LSAP */ |
362 | u8 rw; /* sender receive window */ | |
363 | }; | |
364 | ||
365 | /** | |
366 | * llc_pdu_init_as_xid_cmd - sets bytes 3, 4 & 5 of LLC header as XID | |
367 | * @skb: input skb that header must be set into it. | |
368 | * | |
369 | * This function sets third,fourth,fifth and sixth bytes of LLC header as | |
370 | * a XID PDU. | |
371 | */ | |
372 | static inline void llc_pdu_init_as_xid_cmd(struct sk_buff *skb, | |
373 | u8 svcs_supported, u8 rx_window) | |
374 | { | |
375 | struct llc_xid_info *xid_info; | |
376 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
377 | ||
378 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
379 | pdu->ctrl_1 |= LLC_1_PDU_CMD_XID; | |
380 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
381 | xid_info = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1); | |
382 | xid_info->fmt_id = LLC_XID_FMT_ID; /* 0x81 */ | |
383 | xid_info->type = svcs_supported; | |
384 | xid_info->rw = rx_window << 1; /* size of receive window */ | |
385 | skb_put(skb, 3); | |
386 | } | |
387 | ||
388 | /** | |
389 | * llc_pdu_init_as_xid_rsp - builds XID response PDU | |
390 | * @skb: Address of the skb to build | |
391 | * @svcs_supported: The class of the LLC (I or II) | |
392 | * @rx_window: The size of the receive window of the LLC | |
393 | * | |
394 | * Builds a pdu frame as an XID response. | |
395 | */ | |
396 | static inline void llc_pdu_init_as_xid_rsp(struct sk_buff *skb, | |
397 | u8 svcs_supported, u8 rx_window) | |
398 | { | |
399 | struct llc_xid_info *xid_info; | |
400 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
401 | ||
402 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
403 | pdu->ctrl_1 |= LLC_1_PDU_CMD_XID; | |
404 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
405 | ||
406 | xid_info = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1); | |
407 | xid_info->fmt_id = LLC_XID_FMT_ID; | |
408 | xid_info->type = svcs_supported; | |
409 | xid_info->rw = rx_window << 1; | |
410 | skb_put(skb, 3); | |
411 | } | |
412 | ||
413 | /* LLC Type 2 FRMR response information field format */ | |
414 | struct llc_frmr_info { | |
415 | u16 rej_pdu_ctrl; /* bits 1-8 if U-PDU */ | |
416 | u8 curr_ssv; /* current send state variable val */ | |
417 | u8 curr_rsv; /* current receive state variable */ | |
418 | u8 ind_bits; /* indicator bits set with macro */ | |
419 | }; | |
420 | ||
421 | extern void llc_pdu_set_cmd_rsp(struct sk_buff *skb, u8 type); | |
422 | extern void llc_pdu_set_pf_bit(struct sk_buff *skb, u8 bit_value); | |
423 | extern void llc_pdu_decode_pf_bit(struct sk_buff *skb, u8 *pf_bit); | |
424 | extern void llc_pdu_init_as_disc_cmd(struct sk_buff *skb, u8 p_bit); | |
425 | extern void llc_pdu_init_as_i_cmd(struct sk_buff *skb, u8 p_bit, u8 ns, u8 nr); | |
426 | extern void llc_pdu_init_as_rej_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
427 | extern void llc_pdu_init_as_rnr_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
428 | extern void llc_pdu_init_as_rr_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
429 | extern void llc_pdu_init_as_sabme_cmd(struct sk_buff *skb, u8 p_bit); | |
430 | extern void llc_pdu_init_as_dm_rsp(struct sk_buff *skb, u8 f_bit); | |
431 | extern void llc_pdu_init_as_frmr_rsp(struct sk_buff *skb, | |
432 | struct llc_pdu_sn *prev_pdu, | |
433 | u8 f_bit, u8 vs, u8 vr, u8 vzyxw); | |
434 | extern void llc_pdu_init_as_rr_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
435 | extern void llc_pdu_init_as_rej_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
436 | extern void llc_pdu_init_as_rnr_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
437 | extern void llc_pdu_init_as_ua_rsp(struct sk_buff *skb, u8 f_bit); | |
438 | #endif /* LLC_PDU_H */ |