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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.c: TIPC message header routines | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
38 | #include "addr.h" | |
39 | #include "dbg.h" | |
40 | #include "msg.h" | |
41 | #include "bearer.h" | |
42 | ||
23461e83 AS |
43 | u32 tipc_msg_tot_importance(struct tipc_msg *m) |
44 | { | |
45 | if (likely(msg_isdata(m))) { | |
46 | if (likely(msg_orignode(m) == tipc_own_addr)) | |
47 | return msg_importance(m); | |
48 | return msg_importance(m) + 4; | |
49 | } | |
50 | if ((msg_user(m) == MSG_FRAGMENTER) && | |
51 | (msg_type(m) == FIRST_FRAGMENT)) | |
52 | return msg_importance(msg_get_wrapped(m)); | |
53 | return msg_importance(m); | |
54 | } | |
55 | ||
56 | ||
57 | void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, | |
58 | u32 hsize, u32 destnode) | |
59 | { | |
60 | memset(m, 0, hsize); | |
61 | msg_set_version(m); | |
62 | msg_set_user(m, user); | |
63 | msg_set_hdr_sz(m, hsize); | |
64 | msg_set_size(m, hsize); | |
65 | msg_set_prevnode(m, tipc_own_addr); | |
66 | msg_set_type(m, type); | |
67 | if (!msg_short(m)) { | |
68 | msg_set_orignode(m, tipc_own_addr); | |
69 | msg_set_destnode(m, destnode); | |
70 | } | |
71 | } | |
72 | ||
73 | /** | |
74 | * tipc_msg_calc_data_size - determine total data size for message | |
75 | */ | |
76 | ||
77 | int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) | |
78 | { | |
79 | int dsz = 0; | |
80 | int i; | |
81 | ||
82 | for (i = 0; i < num_sect; i++) | |
83 | dsz += msg_sect[i].iov_len; | |
84 | return dsz; | |
85 | } | |
86 | ||
87 | /** | |
88 | * tipc_msg_build - create message using specified header and data | |
89 | * | |
90 | * Note: Caller must not hold any locks in case copy_from_user() is interrupted! | |
91 | * | |
92 | * Returns message data size or errno | |
93 | */ | |
94 | ||
95 | int tipc_msg_build(struct tipc_msg *hdr, | |
96 | struct iovec const *msg_sect, u32 num_sect, | |
97 | int max_size, int usrmem, struct sk_buff** buf) | |
98 | { | |
99 | int dsz, sz, hsz, pos, res, cnt; | |
100 | ||
101 | dsz = tipc_msg_calc_data_size(msg_sect, num_sect); | |
102 | if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { | |
103 | *buf = NULL; | |
104 | return -EINVAL; | |
105 | } | |
106 | ||
107 | pos = hsz = msg_hdr_sz(hdr); | |
108 | sz = hsz + dsz; | |
109 | msg_set_size(hdr, sz); | |
110 | if (unlikely(sz > max_size)) { | |
111 | *buf = NULL; | |
112 | return dsz; | |
113 | } | |
114 | ||
115 | *buf = buf_acquire(sz); | |
116 | if (!(*buf)) | |
117 | return -ENOMEM; | |
118 | skb_copy_to_linear_data(*buf, hdr, hsz); | |
119 | for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { | |
120 | if (likely(usrmem)) | |
121 | res = !copy_from_user((*buf)->data + pos, | |
122 | msg_sect[cnt].iov_base, | |
123 | msg_sect[cnt].iov_len); | |
124 | else | |
125 | skb_copy_to_linear_data_offset(*buf, pos, | |
126 | msg_sect[cnt].iov_base, | |
127 | msg_sect[cnt].iov_len); | |
128 | pos += msg_sect[cnt].iov_len; | |
129 | } | |
130 | if (likely(res)) | |
131 | return dsz; | |
132 | ||
133 | buf_discard(*buf); | |
134 | *buf = NULL; | |
135 | return -EFAULT; | |
136 | } | |
b97bf3fd | 137 | |
48c97139 AS |
138 | #ifdef CONFIG_TIPC_DEBUG |
139 | ||
140 | void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str) | |
b97bf3fd PL |
141 | { |
142 | u32 usr = msg_user(msg); | |
143 | tipc_printf(buf, str); | |
144 | ||
145 | switch (usr) { | |
146 | case MSG_BUNDLER: | |
147 | tipc_printf(buf, "BNDL::"); | |
148 | tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg)); | |
149 | break; | |
150 | case BCAST_PROTOCOL: | |
151 | tipc_printf(buf, "BCASTP::"); | |
152 | break; | |
153 | case MSG_FRAGMENTER: | |
154 | tipc_printf(buf, "FRAGM::"); | |
155 | switch (msg_type(msg)) { | |
156 | case FIRST_FRAGMENT: | |
157 | tipc_printf(buf, "FIRST:"); | |
158 | break; | |
159 | case FRAGMENT: | |
160 | tipc_printf(buf, "BODY:"); | |
161 | break; | |
162 | case LAST_FRAGMENT: | |
163 | tipc_printf(buf, "LAST:"); | |
164 | break; | |
165 | default: | |
166 | tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); | |
167 | ||
168 | } | |
169 | tipc_printf(buf, "NO(%u/%u):",msg_long_msgno(msg), | |
170 | msg_fragm_no(msg)); | |
171 | break; | |
06d82c91 AS |
172 | case TIPC_LOW_IMPORTANCE: |
173 | case TIPC_MEDIUM_IMPORTANCE: | |
174 | case TIPC_HIGH_IMPORTANCE: | |
175 | case TIPC_CRITICAL_IMPORTANCE: | |
b97bf3fd PL |
176 | tipc_printf(buf, "DAT%u:", msg_user(msg)); |
177 | if (msg_short(msg)) { | |
178 | tipc_printf(buf, "CON:"); | |
179 | break; | |
180 | } | |
181 | switch (msg_type(msg)) { | |
182 | case TIPC_CONN_MSG: | |
183 | tipc_printf(buf, "CON:"); | |
184 | break; | |
185 | case TIPC_MCAST_MSG: | |
186 | tipc_printf(buf, "MCST:"); | |
187 | break; | |
188 | case TIPC_NAMED_MSG: | |
189 | tipc_printf(buf, "NAM:"); | |
190 | break; | |
191 | case TIPC_DIRECT_MSG: | |
192 | tipc_printf(buf, "DIR:"); | |
193 | break; | |
194 | default: | |
195 | tipc_printf(buf, "UNKNOWN TYPE %u",msg_type(msg)); | |
196 | } | |
197 | if (msg_routed(msg) && !msg_non_seq(msg)) | |
198 | tipc_printf(buf, "ROUT:"); | |
199 | if (msg_reroute_cnt(msg)) | |
200 | tipc_printf(buf, "REROUTED(%u):", | |
201 | msg_reroute_cnt(msg)); | |
202 | break; | |
203 | case NAME_DISTRIBUTOR: | |
204 | tipc_printf(buf, "NMD::"); | |
205 | switch (msg_type(msg)) { | |
206 | case PUBLICATION: | |
207 | tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */ | |
208 | break; | |
209 | case WITHDRAWAL: | |
210 | tipc_printf(buf, "WDRW:"); | |
211 | break; | |
212 | default: | |
213 | tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); | |
214 | } | |
215 | if (msg_routed(msg)) | |
216 | tipc_printf(buf, "ROUT:"); | |
217 | if (msg_reroute_cnt(msg)) | |
218 | tipc_printf(buf, "REROUTED(%u):", | |
219 | msg_reroute_cnt(msg)); | |
220 | break; | |
221 | case CONN_MANAGER: | |
222 | tipc_printf(buf, "CONN_MNG:"); | |
223 | switch (msg_type(msg)) { | |
224 | case CONN_PROBE: | |
225 | tipc_printf(buf, "PROBE:"); | |
226 | break; | |
227 | case CONN_PROBE_REPLY: | |
228 | tipc_printf(buf, "PROBE_REPLY:"); | |
229 | break; | |
230 | case CONN_ACK: | |
231 | tipc_printf(buf, "CONN_ACK:"); | |
232 | tipc_printf(buf, "ACK(%u):",msg_msgcnt(msg)); | |
233 | break; | |
234 | default: | |
235 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
236 | } | |
237 | if (msg_routed(msg)) | |
238 | tipc_printf(buf, "ROUT:"); | |
239 | if (msg_reroute_cnt(msg)) | |
240 | tipc_printf(buf, "REROUTED(%u):",msg_reroute_cnt(msg)); | |
241 | break; | |
242 | case LINK_PROTOCOL: | |
243 | tipc_printf(buf, "PROT:TIM(%u):",msg_timestamp(msg)); | |
244 | switch (msg_type(msg)) { | |
245 | case STATE_MSG: | |
246 | tipc_printf(buf, "STATE:"); | |
247 | tipc_printf(buf, "%s:",msg_probe(msg) ? "PRB" :""); | |
248 | tipc_printf(buf, "NXS(%u):",msg_next_sent(msg)); | |
249 | tipc_printf(buf, "GAP(%u):",msg_seq_gap(msg)); | |
250 | tipc_printf(buf, "LSTBC(%u):",msg_last_bcast(msg)); | |
251 | break; | |
252 | case RESET_MSG: | |
253 | tipc_printf(buf, "RESET:"); | |
254 | if (msg_size(msg) != msg_hdr_sz(msg)) | |
255 | tipc_printf(buf, "BEAR:%s:",msg_data(msg)); | |
256 | break; | |
257 | case ACTIVATE_MSG: | |
258 | tipc_printf(buf, "ACTIVATE:"); | |
259 | break; | |
260 | default: | |
261 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
262 | } | |
263 | tipc_printf(buf, "PLANE(%c):",msg_net_plane(msg)); | |
264 | tipc_printf(buf, "SESS(%u):",msg_session(msg)); | |
265 | break; | |
266 | case CHANGEOVER_PROTOCOL: | |
267 | tipc_printf(buf, "TUNL:"); | |
268 | switch (msg_type(msg)) { | |
269 | case DUPLICATE_MSG: | |
270 | tipc_printf(buf, "DUPL:"); | |
271 | break; | |
272 | case ORIGINAL_MSG: | |
273 | tipc_printf(buf, "ORIG:"); | |
274 | tipc_printf(buf, "EXP(%u)",msg_msgcnt(msg)); | |
275 | break; | |
276 | default: | |
277 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
278 | } | |
279 | break; | |
280 | case ROUTE_DISTRIBUTOR: | |
281 | tipc_printf(buf, "ROUTING_MNG:"); | |
282 | switch (msg_type(msg)) { | |
283 | case EXT_ROUTING_TABLE: | |
284 | tipc_printf(buf, "EXT_TBL:"); | |
285 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
286 | break; | |
287 | case LOCAL_ROUTING_TABLE: | |
288 | tipc_printf(buf, "LOCAL_TBL:"); | |
289 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
290 | break; | |
291 | case SLAVE_ROUTING_TABLE: | |
292 | tipc_printf(buf, "DP_TBL:"); | |
293 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
294 | break; | |
295 | case ROUTE_ADDITION: | |
296 | tipc_printf(buf, "ADD:"); | |
297 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
298 | break; | |
299 | case ROUTE_REMOVAL: | |
300 | tipc_printf(buf, "REMOVE:"); | |
301 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
302 | break; | |
303 | default: | |
304 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
305 | } | |
306 | break; | |
307 | case LINK_CONFIG: | |
308 | tipc_printf(buf, "CFG:"); | |
309 | switch (msg_type(msg)) { | |
310 | case DSC_REQ_MSG: | |
311 | tipc_printf(buf, "DSC_REQ:"); | |
312 | break; | |
313 | case DSC_RESP_MSG: | |
314 | tipc_printf(buf, "DSC_RESP:"); | |
315 | break; | |
316 | default: | |
317 | tipc_printf(buf, "UNKNOWN TYPE:%x:",msg_type(msg)); | |
318 | break; | |
319 | } | |
320 | break; | |
321 | default: | |
322 | tipc_printf(buf, "UNKNOWN USER:"); | |
323 | } | |
324 | ||
325 | switch (usr) { | |
326 | case CONN_MANAGER: | |
06d82c91 AS |
327 | case TIPC_LOW_IMPORTANCE: |
328 | case TIPC_MEDIUM_IMPORTANCE: | |
329 | case TIPC_HIGH_IMPORTANCE: | |
330 | case TIPC_CRITICAL_IMPORTANCE: | |
b97bf3fd PL |
331 | switch (msg_errcode(msg)) { |
332 | case TIPC_OK: | |
333 | break; | |
334 | case TIPC_ERR_NO_NAME: | |
335 | tipc_printf(buf, "NO_NAME:"); | |
336 | break; | |
337 | case TIPC_ERR_NO_PORT: | |
338 | tipc_printf(buf, "NO_PORT:"); | |
339 | break; | |
340 | case TIPC_ERR_NO_NODE: | |
341 | tipc_printf(buf, "NO_PROC:"); | |
342 | break; | |
343 | case TIPC_ERR_OVERLOAD: | |
344 | tipc_printf(buf, "OVERLOAD:"); | |
345 | break; | |
346 | case TIPC_CONN_SHUTDOWN: | |
347 | tipc_printf(buf, "SHUTDOWN:"); | |
348 | break; | |
349 | default: | |
350 | tipc_printf(buf, "UNKNOWN ERROR(%x):", | |
351 | msg_errcode(msg)); | |
352 | } | |
353 | default:{} | |
354 | } | |
355 | ||
356 | tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg)); | |
357 | tipc_printf(buf, "SZ(%u):", msg_size(msg)); | |
358 | tipc_printf(buf, "SQNO(%u):", msg_seqno(msg)); | |
359 | ||
360 | if (msg_non_seq(msg)) | |
361 | tipc_printf(buf, "NOSEQ:"); | |
362 | else { | |
363 | tipc_printf(buf, "ACK(%u):", msg_ack(msg)); | |
364 | } | |
365 | tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg)); | |
366 | tipc_printf(buf, "PRND(%x)", msg_prevnode(msg)); | |
367 | ||
368 | if (msg_isdata(msg)) { | |
369 | if (msg_named(msg)) { | |
370 | tipc_printf(buf, "NTYP(%u):", msg_nametype(msg)); | |
371 | tipc_printf(buf, "NINST(%u)", msg_nameinst(msg)); | |
372 | } | |
373 | } | |
374 | ||
375 | if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) && | |
376 | (usr != MSG_BUNDLER)) { | |
377 | if (!msg_short(msg)) { | |
378 | tipc_printf(buf, ":ORIG(%x:%u):", | |
379 | msg_orignode(msg), msg_origport(msg)); | |
380 | tipc_printf(buf, ":DEST(%x:%u):", | |
381 | msg_destnode(msg), msg_destport(msg)); | |
382 | } else { | |
383 | tipc_printf(buf, ":OPRT(%u):", msg_origport(msg)); | |
384 | tipc_printf(buf, ":DPRT(%u):", msg_destport(msg)); | |
385 | } | |
386 | if (msg_routed(msg) && !msg_non_seq(msg)) | |
387 | tipc_printf(buf, ":TSEQN(%u)", msg_transp_seqno(msg)); | |
388 | } | |
389 | if (msg_user(msg) == NAME_DISTRIBUTOR) { | |
390 | tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg)); | |
391 | tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg)); | |
392 | if (msg_routed(msg)) { | |
393 | tipc_printf(buf, ":CSEQN(%u)", msg_transp_seqno(msg)); | |
394 | } | |
395 | } | |
396 | ||
397 | if (msg_user(msg) == LINK_CONFIG) { | |
398 | u32* raw = (u32*)msg; | |
399 | struct tipc_media_addr* orig = (struct tipc_media_addr*)&raw[5]; | |
400 | tipc_printf(buf, ":REQL(%u):", msg_req_links(msg)); | |
401 | tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg)); | |
402 | tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg)); | |
4323add6 | 403 | tipc_media_addr_printf(buf, orig); |
b97bf3fd PL |
404 | } |
405 | if (msg_user(msg) == BCAST_PROTOCOL) { | |
406 | tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg)); | |
407 | tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg)); | |
408 | } | |
409 | tipc_printf(buf, "\n"); | |
410 | if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) { | |
48c97139 | 411 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
b97bf3fd PL |
412 | } |
413 | if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) { | |
48c97139 | 414 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
b97bf3fd PL |
415 | } |
416 | } | |
48c97139 AS |
417 | |
418 | #endif |