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1/*
2 * net/tipc/msg.c: TIPC message header routines
3 *
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2005, 2010-2011, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
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.
19 *
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
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "msg.h"
39
40u32 tipc_msg_tot_importance(struct tipc_msg *m)
41{
42 if (likely(msg_isdata(m))) {
43 if (likely(msg_orignode(m) == tipc_own_addr))
44 return msg_importance(m);
45 return msg_importance(m) + 4;
46 }
47 if ((msg_user(m) == MSG_FRAGMENTER) &&
48 (msg_type(m) == FIRST_FRAGMENT))
49 return msg_importance(msg_get_wrapped(m));
50 return msg_importance(m);
51}
52
53
54void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize,
55 u32 destnode)
56{
57 memset(m, 0, hsize);
58 msg_set_version(m);
59 msg_set_user(m, user);
60 msg_set_hdr_sz(m, hsize);
61 msg_set_size(m, hsize);
62 msg_set_prevnode(m, tipc_own_addr);
63 msg_set_type(m, type);
64 msg_set_orignode(m, tipc_own_addr);
65 msg_set_destnode(m, destnode);
66}
67
68/**
69 * tipc_msg_build - create message using specified header and data
70 *
71 * Note: Caller must not hold any locks in case copy_from_user() is interrupted!
72 *
73 * Returns message data size or errno
74 */
75int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
76 unsigned int len, int max_size, struct sk_buff **buf)
77{
78 int dsz, sz, hsz;
79 unsigned char *to;
80
81 dsz = len;
82 hsz = msg_hdr_sz(hdr);
83 sz = hsz + dsz;
84 msg_set_size(hdr, sz);
85 if (unlikely(sz > max_size)) {
86 *buf = NULL;
87 return dsz;
88 }
89
90 *buf = tipc_buf_acquire(sz);
91 if (!(*buf))
92 return -ENOMEM;
93 skb_copy_to_linear_data(*buf, hdr, hsz);
94 to = (*buf)->data + hsz;
95 if (len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) {
96 kfree_skb(*buf);
97 *buf = NULL;
98 return -EFAULT;
99 }
100 return dsz;
101}
1/*
2 * net/tipc/msg.c: TIPC message header routines
3 *
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2005, 2010-2011, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
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.
19 *
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
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "msg.h"
39
40u32 tipc_msg_tot_importance(struct tipc_msg *m)
41{
42 if (likely(msg_isdata(m))) {
43 if (likely(msg_orignode(m) == tipc_own_addr))
44 return msg_importance(m);
45 return msg_importance(m) + 4;
46 }
47 if ((msg_user(m) == MSG_FRAGMENTER) &&
48 (msg_type(m) == FIRST_FRAGMENT))
49 return msg_importance(msg_get_wrapped(m));
50 return msg_importance(m);
51}
52
53
54void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
55 u32 hsize, u32 destnode)
56{
57 memset(m, 0, hsize);
58 msg_set_version(m);
59 msg_set_user(m, user);
60 msg_set_hdr_sz(m, hsize);
61 msg_set_size(m, hsize);
62 msg_set_prevnode(m, tipc_own_addr);
63 msg_set_type(m, type);
64 msg_set_orignode(m, tipc_own_addr);
65 msg_set_destnode(m, destnode);
66}
67
68/**
69 * tipc_msg_build - create message using specified header and data
70 *
71 * Note: Caller must not hold any locks in case copy_from_user() is interrupted!
72 *
73 * Returns message data size or errno
74 */
75int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
76 u32 num_sect, unsigned int total_len,
77 int max_size, int usrmem, struct sk_buff **buf)
78{
79 int dsz, sz, hsz, pos, res, cnt;
80
81 dsz = total_len;
82 pos = hsz = msg_hdr_sz(hdr);
83 sz = hsz + dsz;
84 msg_set_size(hdr, sz);
85 if (unlikely(sz > max_size)) {
86 *buf = NULL;
87 return dsz;
88 }
89
90 *buf = tipc_buf_acquire(sz);
91 if (!(*buf))
92 return -ENOMEM;
93 skb_copy_to_linear_data(*buf, hdr, hsz);
94 for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
95 if (likely(usrmem))
96 res = !copy_from_user((*buf)->data + pos,
97 msg_sect[cnt].iov_base,
98 msg_sect[cnt].iov_len);
99 else
100 skb_copy_to_linear_data_offset(*buf, pos,
101 msg_sect[cnt].iov_base,
102 msg_sect[cnt].iov_len);
103 pos += msg_sect[cnt].iov_len;
104 }
105 if (likely(res))
106 return dsz;
107
108 kfree_skb(*buf);
109 *buf = NULL;
110 return -EFAULT;
111}
112
113#ifdef CONFIG_TIPC_DEBUG
114void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
115{
116 u32 usr = msg_user(msg);
117 tipc_printf(buf, KERN_DEBUG);
118 tipc_printf(buf, str);
119
120 switch (usr) {
121 case MSG_BUNDLER:
122 tipc_printf(buf, "BNDL::");
123 tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
124 break;
125 case BCAST_PROTOCOL:
126 tipc_printf(buf, "BCASTP::");
127 break;
128 case MSG_FRAGMENTER:
129 tipc_printf(buf, "FRAGM::");
130 switch (msg_type(msg)) {
131 case FIRST_FRAGMENT:
132 tipc_printf(buf, "FIRST:");
133 break;
134 case FRAGMENT:
135 tipc_printf(buf, "BODY:");
136 break;
137 case LAST_FRAGMENT:
138 tipc_printf(buf, "LAST:");
139 break;
140 default:
141 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
142
143 }
144 tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg),
145 msg_fragm_no(msg));
146 break;
147 case TIPC_LOW_IMPORTANCE:
148 case TIPC_MEDIUM_IMPORTANCE:
149 case TIPC_HIGH_IMPORTANCE:
150 case TIPC_CRITICAL_IMPORTANCE:
151 tipc_printf(buf, "DAT%u:", msg_user(msg));
152 if (msg_short(msg)) {
153 tipc_printf(buf, "CON:");
154 break;
155 }
156 switch (msg_type(msg)) {
157 case TIPC_CONN_MSG:
158 tipc_printf(buf, "CON:");
159 break;
160 case TIPC_MCAST_MSG:
161 tipc_printf(buf, "MCST:");
162 break;
163 case TIPC_NAMED_MSG:
164 tipc_printf(buf, "NAM:");
165 break;
166 case TIPC_DIRECT_MSG:
167 tipc_printf(buf, "DIR:");
168 break;
169 default:
170 tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg));
171 }
172 if (msg_reroute_cnt(msg))
173 tipc_printf(buf, "REROUTED(%u):",
174 msg_reroute_cnt(msg));
175 break;
176 case NAME_DISTRIBUTOR:
177 tipc_printf(buf, "NMD::");
178 switch (msg_type(msg)) {
179 case PUBLICATION:
180 tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
181 break;
182 case WITHDRAWAL:
183 tipc_printf(buf, "WDRW:");
184 break;
185 default:
186 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
187 }
188 if (msg_reroute_cnt(msg))
189 tipc_printf(buf, "REROUTED(%u):",
190 msg_reroute_cnt(msg));
191 break;
192 case CONN_MANAGER:
193 tipc_printf(buf, "CONN_MNG:");
194 switch (msg_type(msg)) {
195 case CONN_PROBE:
196 tipc_printf(buf, "PROBE:");
197 break;
198 case CONN_PROBE_REPLY:
199 tipc_printf(buf, "PROBE_REPLY:");
200 break;
201 case CONN_ACK:
202 tipc_printf(buf, "CONN_ACK:");
203 tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg));
204 break;
205 default:
206 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
207 }
208 if (msg_reroute_cnt(msg))
209 tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg));
210 break;
211 case LINK_PROTOCOL:
212 switch (msg_type(msg)) {
213 case STATE_MSG:
214 tipc_printf(buf, "STATE:");
215 tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : "");
216 tipc_printf(buf, "NXS(%u):", msg_next_sent(msg));
217 tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg));
218 tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg));
219 break;
220 case RESET_MSG:
221 tipc_printf(buf, "RESET:");
222 if (msg_size(msg) != msg_hdr_sz(msg))
223 tipc_printf(buf, "BEAR:%s:", msg_data(msg));
224 break;
225 case ACTIVATE_MSG:
226 tipc_printf(buf, "ACTIVATE:");
227 break;
228 default:
229 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
230 }
231 tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg));
232 tipc_printf(buf, "SESS(%u):", msg_session(msg));
233 break;
234 case CHANGEOVER_PROTOCOL:
235 tipc_printf(buf, "TUNL:");
236 switch (msg_type(msg)) {
237 case DUPLICATE_MSG:
238 tipc_printf(buf, "DUPL:");
239 break;
240 case ORIGINAL_MSG:
241 tipc_printf(buf, "ORIG:");
242 tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg));
243 break;
244 default:
245 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
246 }
247 break;
248 case LINK_CONFIG:
249 tipc_printf(buf, "CFG:");
250 switch (msg_type(msg)) {
251 case DSC_REQ_MSG:
252 tipc_printf(buf, "DSC_REQ:");
253 break;
254 case DSC_RESP_MSG:
255 tipc_printf(buf, "DSC_RESP:");
256 break;
257 default:
258 tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg));
259 break;
260 }
261 break;
262 default:
263 tipc_printf(buf, "UNKNOWN USER:");
264 }
265
266 switch (usr) {
267 case CONN_MANAGER:
268 case TIPC_LOW_IMPORTANCE:
269 case TIPC_MEDIUM_IMPORTANCE:
270 case TIPC_HIGH_IMPORTANCE:
271 case TIPC_CRITICAL_IMPORTANCE:
272 switch (msg_errcode(msg)) {
273 case TIPC_OK:
274 break;
275 case TIPC_ERR_NO_NAME:
276 tipc_printf(buf, "NO_NAME:");
277 break;
278 case TIPC_ERR_NO_PORT:
279 tipc_printf(buf, "NO_PORT:");
280 break;
281 case TIPC_ERR_NO_NODE:
282 tipc_printf(buf, "NO_PROC:");
283 break;
284 case TIPC_ERR_OVERLOAD:
285 tipc_printf(buf, "OVERLOAD:");
286 break;
287 case TIPC_CONN_SHUTDOWN:
288 tipc_printf(buf, "SHUTDOWN:");
289 break;
290 default:
291 tipc_printf(buf, "UNKNOWN ERROR(%x):",
292 msg_errcode(msg));
293 }
294 default:
295 break;
296 }
297
298 tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
299 tipc_printf(buf, "SZ(%u):", msg_size(msg));
300 tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));
301
302 if (msg_non_seq(msg))
303 tipc_printf(buf, "NOSEQ:");
304 else
305 tipc_printf(buf, "ACK(%u):", msg_ack(msg));
306 tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
307 tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
308
309 if (msg_isdata(msg)) {
310 if (msg_named(msg)) {
311 tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
312 tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
313 }
314 }
315
316 if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
317 (usr != MSG_BUNDLER)) {
318 if (!msg_short(msg)) {
319 tipc_printf(buf, ":ORIG(%x:%u):",
320 msg_orignode(msg), msg_origport(msg));
321 tipc_printf(buf, ":DEST(%x:%u):",
322 msg_destnode(msg), msg_destport(msg));
323 } else {
324 tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
325 tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
326 }
327 }
328 if (msg_user(msg) == NAME_DISTRIBUTOR) {
329 tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
330 tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
331 }
332
333 if (msg_user(msg) == LINK_CONFIG) {
334 struct tipc_media_addr orig;
335
336 tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
337 tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
338 memcpy(orig.value, msg_media_addr(msg), sizeof(orig.value));
339 orig.media_id = 0;
340 orig.broadcast = 0;
341 tipc_media_addr_printf(buf, &orig);
342 }
343 if (msg_user(msg) == BCAST_PROTOCOL) {
344 tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
345 tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
346 }
347 tipc_printf(buf, "\n");
348 if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg)))
349 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
350 if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT))
351 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
352}
353#endif