Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
16 | |
17 | /* Lengths of frame formats */ | |
c7c9d210 PS |
18 | #define LLC_PDU_LEN_I 4 /* header and 2 control bytes */ |
19 | #define LLC_PDU_LEN_S 4 | |
20 | #define LLC_PDU_LEN_U 3 /* header and 1 control byte */ | |
21 | /* header and 1 control byte and XID info */ | |
22 | #define LLC_PDU_LEN_U_XID (LLC_PDU_LEN_U + sizeof(struct llc_xid_info)) | |
1da177e4 LT |
23 | /* Known SAP addresses */ |
24 | #define LLC_GLOBAL_SAP 0xFF | |
25 | #define LLC_NULL_SAP 0x00 /* not network-layer visible */ | |
26 | #define LLC_MGMT_INDIV 0x02 /* station LLC mgmt indiv addr */ | |
27 | #define LLC_MGMT_GRP 0x03 /* station LLC mgmt group addr */ | |
28 | #define LLC_RDE_SAP 0xA6 /* route ... */ | |
29 | ||
30 | /* SAP field bit masks */ | |
31 | #define LLC_ISO_RESERVED_SAP 0x02 | |
32 | #define LLC_SAP_GROUP_DSAP 0x01 | |
33 | #define LLC_SAP_RESP_SSAP 0x01 | |
34 | ||
35 | /* Group/individual DSAP indicator is DSAP field */ | |
36 | #define LLC_PDU_GROUP_DSAP_MASK 0x01 | |
37 | #define LLC_PDU_IS_GROUP_DSAP(pdu) \ | |
38 | ((pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1) | |
39 | #define LLC_PDU_IS_INDIV_DSAP(pdu) \ | |
40 | (!(pdu->dsap & LLC_PDU_GROUP_DSAP_MASK) ? 0 : 1) | |
41 | ||
42 | /* Command/response PDU indicator in SSAP field */ | |
43 | #define LLC_PDU_CMD_RSP_MASK 0x01 | |
44 | #define LLC_PDU_CMD 0 | |
45 | #define LLC_PDU_RSP 1 | |
46 | #define LLC_PDU_IS_CMD(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 0 : 1) | |
47 | #define LLC_PDU_IS_RSP(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 1 : 0) | |
48 | ||
49 | /* Get PDU type from 2 lowest-order bits of control field first byte */ | |
50 | #define LLC_PDU_TYPE_I_MASK 0x01 /* 16-bit control field */ | |
51 | #define LLC_PDU_TYPE_S_MASK 0x03 | |
52 | #define LLC_PDU_TYPE_U_MASK 0x03 /* 8-bit control field */ | |
53 | #define LLC_PDU_TYPE_MASK 0x03 | |
54 | ||
c7c9d210 PS |
55 | #define LLC_PDU_TYPE_I 0 /* first bit */ |
56 | #define LLC_PDU_TYPE_S 1 /* first two bits */ | |
57 | #define LLC_PDU_TYPE_U 3 /* first two bits */ | |
58 | #define LLC_PDU_TYPE_U_XID 4 /* private type for detecting XID commands */ | |
1da177e4 LT |
59 | |
60 | #define LLC_PDU_TYPE_IS_I(pdu) \ | |
61 | ((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 1 : 0) | |
62 | ||
63 | #define LLC_PDU_TYPE_IS_U(pdu) \ | |
64 | (((pdu->ctrl_1 & LLC_PDU_TYPE_U_MASK) == LLC_PDU_TYPE_U) ? 1 : 0) | |
65 | ||
66 | #define LLC_PDU_TYPE_IS_S(pdu) \ | |
67 | (((pdu->ctrl_1 & LLC_PDU_TYPE_S_MASK) == LLC_PDU_TYPE_S) ? 1 : 0) | |
68 | ||
69 | /* U-format PDU control field masks */ | |
70 | #define LLC_U_PF_BIT_MASK 0x10 /* P/F bit mask */ | |
71 | #define LLC_U_PF_IS_1(pdu) ((pdu->ctrl_1 & LLC_U_PF_BIT_MASK) ? 1 : 0) | |
72 | #define LLC_U_PF_IS_0(pdu) ((!(pdu->ctrl_1 & LLC_U_PF_BIT_MASK)) ? 1 : 0) | |
73 | ||
74 | #define LLC_U_PDU_CMD_MASK 0xEC /* cmd/rsp mask */ | |
75 | #define LLC_U_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK) | |
76 | #define LLC_U_PDU_RSP(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK) | |
77 | ||
78 | #define LLC_1_PDU_CMD_UI 0x00 /* Type 1 cmds/rsps */ | |
79 | #define LLC_1_PDU_CMD_XID 0xAC | |
80 | #define LLC_1_PDU_CMD_TEST 0xE0 | |
81 | ||
82 | #define LLC_2_PDU_CMD_SABME 0x6C /* Type 2 cmds/rsps */ | |
83 | #define LLC_2_PDU_CMD_DISC 0x40 | |
84 | #define LLC_2_PDU_RSP_UA 0x60 | |
85 | #define LLC_2_PDU_RSP_DM 0x0C | |
86 | #define LLC_2_PDU_RSP_FRMR 0x84 | |
87 | ||
88 | /* Type 1 operations */ | |
89 | ||
90 | /* XID information field bit masks */ | |
91 | ||
92 | /* LLC format identifier (byte 1) */ | |
93 | #define LLC_XID_FMT_ID 0x81 /* first byte must be this */ | |
94 | ||
95 | /* LLC types/classes identifier (byte 2) */ | |
96 | #define LLC_XID_CLASS_ZEROS_MASK 0xE0 /* these must be zeros */ | |
97 | #define LLC_XID_CLASS_MASK 0x1F /* AND with byte to get below */ | |
98 | ||
99 | #define LLC_XID_NULL_CLASS_1 0x01 /* if NULL LSAP...use these */ | |
100 | #define LLC_XID_NULL_CLASS_2 0x03 | |
101 | #define LLC_XID_NULL_CLASS_3 0x05 | |
102 | #define LLC_XID_NULL_CLASS_4 0x07 | |
103 | ||
104 | #define LLC_XID_NNULL_TYPE_1 0x01 /* if non-NULL LSAP...use these */ | |
105 | #define LLC_XID_NNULL_TYPE_2 0x02 | |
106 | #define LLC_XID_NNULL_TYPE_3 0x04 | |
107 | #define LLC_XID_NNULL_TYPE_1_2 0x03 | |
108 | #define LLC_XID_NNULL_TYPE_1_3 0x05 | |
109 | #define LLC_XID_NNULL_TYPE_2_3 0x06 | |
110 | #define LLC_XID_NNULL_ALL 0x07 | |
111 | ||
112 | /* Sender Receive Window (byte 3) */ | |
113 | #define LLC_XID_RW_MASK 0xFE /* AND with value to get below */ | |
114 | ||
115 | #define LLC_XID_MIN_RW 0x02 /* lowest-order bit always zero */ | |
116 | ||
117 | /* Type 2 operations */ | |
118 | ||
119 | #define LLC_2_SEQ_NBR_MODULO ((u8) 128) | |
120 | ||
121 | /* I-PDU masks ('ctrl' is I-PDU control word) */ | |
122 | #define LLC_I_GET_NS(pdu) (u8)((pdu->ctrl_1 & 0xFE) >> 1) | |
123 | #define LLC_I_GET_NR(pdu) (u8)((pdu->ctrl_2 & 0xFE) >> 1) | |
124 | ||
125 | #define LLC_I_PF_BIT_MASK 0x01 | |
126 | ||
127 | #define LLC_I_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_I_PF_BIT_MASK)) ? 1 : 0) | |
128 | #define LLC_I_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_I_PF_BIT_MASK) ? 1 : 0) | |
129 | ||
130 | /* S-PDU supervisory commands and responses */ | |
131 | ||
132 | #define LLC_S_PDU_CMD_MASK 0x0C | |
133 | #define LLC_S_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK) | |
134 | #define LLC_S_PDU_RSP(pdu) (pdu->ctrl_1 & LLC_S_PDU_CMD_MASK) | |
135 | ||
136 | #define LLC_2_PDU_CMD_RR 0x00 /* rx ready cmd */ | |
137 | #define LLC_2_PDU_RSP_RR 0x00 /* rx ready rsp */ | |
138 | #define LLC_2_PDU_CMD_REJ 0x08 /* reject PDU cmd */ | |
139 | #define LLC_2_PDU_RSP_REJ 0x08 /* reject PDU rsp */ | |
140 | #define LLC_2_PDU_CMD_RNR 0x04 /* rx not ready cmd */ | |
141 | #define LLC_2_PDU_RSP_RNR 0x04 /* rx not ready rsp */ | |
142 | ||
143 | #define LLC_S_PF_BIT_MASK 0x01 | |
144 | #define LLC_S_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_S_PF_BIT_MASK)) ? 1 : 0) | |
145 | #define LLC_S_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_S_PF_BIT_MASK) ? 1 : 0) | |
146 | ||
147 | #define PDU_SUPV_GET_Nr(pdu) ((pdu->ctrl_2 & 0xFE) >> 1) | |
7e030963 | 148 | #define PDU_GET_NEXT_Vr(sn) (((sn) + 1) & ~LLC_2_SEQ_NBR_MODULO) |
1da177e4 LT |
149 | |
150 | /* FRMR information field macros */ | |
151 | ||
152 | #define FRMR_INFO_LENGTH 5 /* 5 bytes of information */ | |
153 | ||
154 | /* | |
155 | * info is pointer to FRMR info field structure; 'rej_ctrl' is byte pointer | |
156 | * (if U-PDU) or word pointer to rejected PDU control field | |
157 | */ | |
158 | #define FRMR_INFO_SET_REJ_CNTRL(info,rej_ctrl) \ | |
159 | info->rej_pdu_ctrl = ((*((u8 *) rej_ctrl) & \ | |
160 | LLC_PDU_TYPE_U) != LLC_PDU_TYPE_U ? \ | |
161 | (u16)*((u16 *) rej_ctrl) : \ | |
162 | (((u16) *((u8 *) rej_ctrl)) & 0x00FF)) | |
163 | ||
164 | /* | |
165 | * Info is pointer to FRMR info field structure; 'vs' is a byte containing | |
166 | * send state variable value in low-order 7 bits (insure the lowest-order | |
167 | * bit remains zero (0)) | |
168 | */ | |
169 | #define FRMR_INFO_SET_Vs(info,vs) (info->curr_ssv = (((u8) vs) << 1)) | |
170 | #define FRMR_INFO_SET_Vr(info,vr) (info->curr_rsv = (((u8) vr) << 1)) | |
171 | ||
172 | /* | |
173 | * Info is pointer to FRMR info field structure; 'cr' is a byte containing | |
174 | * the C/R bit value in the low-order bit | |
175 | */ | |
176 | #define FRMR_INFO_SET_C_R_BIT(info, cr) (info->curr_rsv |= (((u8) cr) & 0x01)) | |
177 | ||
178 | /* | |
179 | * In the remaining five macros, 'info' is pointer to FRMR info field | |
180 | * structure; 'ind' is a byte containing the bit value to set in the | |
181 | * lowest-order bit) | |
182 | */ | |
183 | #define FRMR_INFO_SET_INVALID_PDU_CTRL_IND(info, ind) \ | |
184 | (info->ind_bits = ((info->ind_bits & 0xFE) | (((u8) ind) & 0x01))) | |
185 | ||
186 | #define FRMR_INFO_SET_INVALID_PDU_INFO_IND(info, ind) \ | |
187 | (info->ind_bits = ( (info->ind_bits & 0xFD) | (((u8) ind) & 0x02))) | |
188 | ||
189 | #define FRMR_INFO_SET_PDU_INFO_2LONG_IND(info, ind) \ | |
190 | (info->ind_bits = ( (info->ind_bits & 0xFB) | (((u8) ind) & 0x04))) | |
191 | ||
192 | #define FRMR_INFO_SET_PDU_INVALID_Nr_IND(info, ind) \ | |
193 | (info->ind_bits = ( (info->ind_bits & 0xF7) | (((u8) ind) & 0x08))) | |
194 | ||
195 | #define FRMR_INFO_SET_PDU_INVALID_Ns_IND(info, ind) \ | |
196 | (info->ind_bits = ( (info->ind_bits & 0xEF) | (((u8) ind) & 0x10))) | |
197 | ||
198 | /* Sequence-numbered PDU format (4 bytes in length) */ | |
199 | struct llc_pdu_sn { | |
200 | u8 dsap; | |
201 | u8 ssap; | |
202 | u8 ctrl_1; | |
203 | u8 ctrl_2; | |
a10e1466 | 204 | } __packed; |
1da177e4 LT |
205 | |
206 | static inline struct llc_pdu_sn *llc_pdu_sn_hdr(struct sk_buff *skb) | |
207 | { | |
d56f90a7 | 208 | return (struct llc_pdu_sn *)skb_network_header(skb); |
1da177e4 LT |
209 | } |
210 | ||
211 | /* Un-numbered PDU format (3 bytes in length) */ | |
212 | struct llc_pdu_un { | |
213 | u8 dsap; | |
214 | u8 ssap; | |
215 | u8 ctrl_1; | |
a10e1466 | 216 | } __packed; |
1da177e4 LT |
217 | |
218 | static inline struct llc_pdu_un *llc_pdu_un_hdr(struct sk_buff *skb) | |
219 | { | |
d56f90a7 | 220 | return (struct llc_pdu_un *)skb_network_header(skb); |
1da177e4 LT |
221 | } |
222 | ||
1da177e4 LT |
223 | /** |
224 | * llc_pdu_header_init - initializes pdu header | |
225 | * @skb: input skb that header must be set into it. | |
226 | * @type: type of PDU (U, I or S). | |
227 | * @ssap: source sap. | |
228 | * @dsap: destination sap. | |
229 | * @cr: command/response bit (0 or 1). | |
230 | * | |
231 | * This function sets DSAP, SSAP and command/Response bit in LLC header. | |
232 | */ | |
233 | static inline void llc_pdu_header_init(struct sk_buff *skb, u8 type, | |
234 | u8 ssap, u8 dsap, u8 cr) | |
235 | { | |
c7c9d210 | 236 | int hlen = 4; /* default value for I and S types */ |
37e66366 ACM |
237 | struct llc_pdu_un *pdu; |
238 | ||
c7c9d210 PS |
239 | switch (type) { |
240 | case LLC_PDU_TYPE_U: | |
241 | hlen = 3; | |
242 | break; | |
243 | case LLC_PDU_TYPE_U_XID: | |
244 | hlen = 6; | |
245 | break; | |
246 | } | |
247 | ||
37e66366 | 248 | skb_push(skb, hlen); |
c1d2bbe1 | 249 | skb_reset_network_header(skb); |
37e66366 | 250 | pdu = llc_pdu_un_hdr(skb); |
1da177e4 LT |
251 | pdu->dsap = dsap; |
252 | pdu->ssap = ssap; | |
253 | pdu->ssap |= cr; | |
254 | } | |
255 | ||
256 | /** | |
257 | * llc_pdu_decode_sa - extracs source address (MAC) of input frame | |
258 | * @skb: input skb that source address must be extracted from it. | |
259 | * @sa: pointer to source address (6 byte array). | |
260 | * | |
261 | * This function extracts source address(MAC) of input frame. | |
262 | */ | |
263 | static inline void llc_pdu_decode_sa(struct sk_buff *skb, u8 *sa) | |
264 | { | |
3fbd418a | 265 | if (skb->protocol == htons(ETH_P_802_2)) |
1da177e4 | 266 | memcpy(sa, eth_hdr(skb)->h_source, ETH_ALEN); |
1da177e4 LT |
267 | } |
268 | ||
269 | /** | |
270 | * llc_pdu_decode_da - extracts dest address of input frame | |
271 | * @skb: input skb that destination address must be extracted from it | |
272 | * @sa: pointer to destination address (6 byte array). | |
273 | * | |
274 | * This function extracts destination address(MAC) of input frame. | |
275 | */ | |
276 | static inline void llc_pdu_decode_da(struct sk_buff *skb, u8 *da) | |
277 | { | |
3fbd418a | 278 | if (skb->protocol == htons(ETH_P_802_2)) |
1da177e4 | 279 | memcpy(da, eth_hdr(skb)->h_dest, ETH_ALEN); |
1da177e4 LT |
280 | } |
281 | ||
282 | /** | |
283 | * llc_pdu_decode_ssap - extracts source SAP of input frame | |
284 | * @skb: input skb that source SAP must be extracted from it. | |
285 | * @ssap: source SAP (output argument). | |
286 | * | |
287 | * This function extracts source SAP of input frame. Right bit of SSAP is | |
288 | * command/response bit. | |
289 | */ | |
290 | static inline void llc_pdu_decode_ssap(struct sk_buff *skb, u8 *ssap) | |
291 | { | |
292 | *ssap = llc_pdu_un_hdr(skb)->ssap & 0xFE; | |
293 | } | |
294 | ||
295 | /** | |
296 | * llc_pdu_decode_dsap - extracts dest SAP of input frame | |
297 | * @skb: input skb that destination SAP must be extracted from it. | |
298 | * @dsap: destination SAP (output argument). | |
299 | * | |
300 | * This function extracts destination SAP of input frame. right bit of | |
301 | * DSAP designates individual/group SAP. | |
302 | */ | |
303 | static inline void llc_pdu_decode_dsap(struct sk_buff *skb, u8 *dsap) | |
304 | { | |
305 | *dsap = llc_pdu_un_hdr(skb)->dsap & 0xFE; | |
306 | } | |
307 | ||
308 | /** | |
309 | * llc_pdu_init_as_ui_cmd - sets LLC header as UI PDU | |
310 | * @skb: input skb that header must be set into it. | |
311 | * | |
312 | * This function sets third byte of LLC header as a UI PDU. | |
313 | */ | |
314 | static inline void llc_pdu_init_as_ui_cmd(struct sk_buff *skb) | |
315 | { | |
316 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
317 | ||
318 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
319 | pdu->ctrl_1 |= LLC_1_PDU_CMD_UI; | |
320 | } | |
321 | ||
322 | /** | |
323 | * llc_pdu_init_as_test_cmd - sets PDU as TEST | |
324 | * @skb - Address of the skb to build | |
325 | * | |
326 | * Sets a PDU as TEST | |
327 | */ | |
328 | static inline void llc_pdu_init_as_test_cmd(struct sk_buff *skb) | |
329 | { | |
330 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
331 | ||
332 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
333 | pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST; | |
334 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
335 | } | |
336 | ||
337 | /** | |
338 | * llc_pdu_init_as_test_rsp - build TEST response PDU | |
339 | * @skb: Address of the skb to build | |
340 | * @ev_skb: The received TEST command PDU frame | |
341 | * | |
342 | * Builds a pdu frame as a TEST response. | |
343 | */ | |
344 | static inline void llc_pdu_init_as_test_rsp(struct sk_buff *skb, | |
345 | struct sk_buff *ev_skb) | |
346 | { | |
347 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
348 | ||
349 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
350 | pdu->ctrl_1 |= LLC_1_PDU_CMD_TEST; | |
351 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
3fbd418a | 352 | if (ev_skb->protocol == htons(ETH_P_802_2)) { |
1da177e4 LT |
353 | struct llc_pdu_un *ev_pdu = llc_pdu_un_hdr(ev_skb); |
354 | int dsize; | |
355 | ||
356 | dsize = ntohs(eth_hdr(ev_skb)->h_proto) - 3; | |
357 | memcpy(((u8 *)pdu) + 3, ((u8 *)ev_pdu) + 3, dsize); | |
358 | skb_put(skb, dsize); | |
359 | } | |
360 | } | |
361 | ||
362 | /* LLC Type 1 XID command/response information fields format */ | |
363 | struct llc_xid_info { | |
cf225356 | 364 | u8 fmt_id; /* always 0x81 for LLC */ |
1da177e4 LT |
365 | u8 type; /* different if NULL/non-NULL LSAP */ |
366 | u8 rw; /* sender receive window */ | |
a10e1466 | 367 | } __packed; |
1da177e4 LT |
368 | |
369 | /** | |
370 | * llc_pdu_init_as_xid_cmd - sets bytes 3, 4 & 5 of LLC header as XID | |
371 | * @skb: input skb that header must be set into it. | |
372 | * | |
373 | * This function sets third,fourth,fifth and sixth bytes of LLC header as | |
374 | * a XID PDU. | |
375 | */ | |
376 | static inline void llc_pdu_init_as_xid_cmd(struct sk_buff *skb, | |
377 | u8 svcs_supported, u8 rx_window) | |
378 | { | |
379 | struct llc_xid_info *xid_info; | |
380 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
381 | ||
382 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
383 | pdu->ctrl_1 |= LLC_1_PDU_CMD_XID; | |
384 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
385 | xid_info = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1); | |
386 | xid_info->fmt_id = LLC_XID_FMT_ID; /* 0x81 */ | |
387 | xid_info->type = svcs_supported; | |
388 | xid_info->rw = rx_window << 1; /* size of receive window */ | |
c7c9d210 PS |
389 | |
390 | /* no need to push/put since llc_pdu_header_init() has already | |
391 | * pushed 3 + 3 bytes | |
392 | */ | |
1da177e4 LT |
393 | } |
394 | ||
395 | /** | |
396 | * llc_pdu_init_as_xid_rsp - builds XID response PDU | |
397 | * @skb: Address of the skb to build | |
398 | * @svcs_supported: The class of the LLC (I or II) | |
399 | * @rx_window: The size of the receive window of the LLC | |
400 | * | |
401 | * Builds a pdu frame as an XID response. | |
402 | */ | |
403 | static inline void llc_pdu_init_as_xid_rsp(struct sk_buff *skb, | |
404 | u8 svcs_supported, u8 rx_window) | |
405 | { | |
406 | struct llc_xid_info *xid_info; | |
407 | struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); | |
408 | ||
409 | pdu->ctrl_1 = LLC_PDU_TYPE_U; | |
410 | pdu->ctrl_1 |= LLC_1_PDU_CMD_XID; | |
411 | pdu->ctrl_1 |= LLC_U_PF_BIT_MASK; | |
412 | ||
413 | xid_info = (struct llc_xid_info *)(((u8 *)&pdu->ctrl_1) + 1); | |
414 | xid_info->fmt_id = LLC_XID_FMT_ID; | |
415 | xid_info->type = svcs_supported; | |
416 | xid_info->rw = rx_window << 1; | |
f83f1768 | 417 | skb_put(skb, sizeof(struct llc_xid_info)); |
1da177e4 LT |
418 | } |
419 | ||
420 | /* LLC Type 2 FRMR response information field format */ | |
421 | struct llc_frmr_info { | |
422 | u16 rej_pdu_ctrl; /* bits 1-8 if U-PDU */ | |
423 | u8 curr_ssv; /* current send state variable val */ | |
424 | u8 curr_rsv; /* current receive state variable */ | |
425 | u8 ind_bits; /* indicator bits set with macro */ | |
a10e1466 | 426 | } __packed; |
1da177e4 | 427 | |
bf3c710f JP |
428 | void llc_pdu_set_cmd_rsp(struct sk_buff *skb, u8 type); |
429 | void llc_pdu_set_pf_bit(struct sk_buff *skb, u8 bit_value); | |
430 | void llc_pdu_decode_pf_bit(struct sk_buff *skb, u8 *pf_bit); | |
431 | void llc_pdu_init_as_disc_cmd(struct sk_buff *skb, u8 p_bit); | |
432 | void llc_pdu_init_as_i_cmd(struct sk_buff *skb, u8 p_bit, u8 ns, u8 nr); | |
433 | void llc_pdu_init_as_rej_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
434 | void llc_pdu_init_as_rnr_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
435 | void llc_pdu_init_as_rr_cmd(struct sk_buff *skb, u8 p_bit, u8 nr); | |
436 | void llc_pdu_init_as_sabme_cmd(struct sk_buff *skb, u8 p_bit); | |
437 | void llc_pdu_init_as_dm_rsp(struct sk_buff *skb, u8 f_bit); | |
438 | void llc_pdu_init_as_frmr_rsp(struct sk_buff *skb, struct llc_pdu_sn *prev_pdu, | |
439 | u8 f_bit, u8 vs, u8 vr, u8 vzyxw); | |
440 | void llc_pdu_init_as_rr_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
441 | void llc_pdu_init_as_rej_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
442 | void llc_pdu_init_as_rnr_rsp(struct sk_buff *skb, u8 f_bit, u8 nr); | |
443 | void llc_pdu_init_as_ua_rsp(struct sk_buff *skb, u8 f_bit); | |
1da177e4 | 444 | #endif /* LLC_PDU_H */ |