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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 */
75
76int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
77 u32 num_sect, unsigned int total_len,
78 int max_size, int usrmem, struct sk_buff **buf)
79{
80 int dsz, sz, hsz, pos, res, cnt;
81
82 dsz = total_len;
83 pos = hsz = msg_hdr_sz(hdr);
84 sz = hsz + dsz;
85 msg_set_size(hdr, sz);
86 if (unlikely(sz > max_size)) {
87 *buf = NULL;
88 return dsz;
89 }
90
91 *buf = tipc_buf_acquire(sz);
92 if (!(*buf))
93 return -ENOMEM;
94 skb_copy_to_linear_data(*buf, hdr, hsz);
95 for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
96 if (likely(usrmem))
97 res = !copy_from_user((*buf)->data + pos,
98 msg_sect[cnt].iov_base,
99 msg_sect[cnt].iov_len);
100 else
101 skb_copy_to_linear_data_offset(*buf, pos,
102 msg_sect[cnt].iov_base,
103 msg_sect[cnt].iov_len);
104 pos += msg_sect[cnt].iov_len;
105 }
106 if (likely(res))
107 return dsz;
108
109 buf_discard(*buf);
110 *buf = NULL;
111 return -EFAULT;
112}
113
114#ifdef CONFIG_TIPC_DEBUG
115
116void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
117{
118 u32 usr = msg_user(msg);
119 tipc_printf(buf, KERN_DEBUG);
120 tipc_printf(buf, str);
121
122 switch (usr) {
123 case MSG_BUNDLER:
124 tipc_printf(buf, "BNDL::");
125 tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
126 break;
127 case BCAST_PROTOCOL:
128 tipc_printf(buf, "BCASTP::");
129 break;
130 case MSG_FRAGMENTER:
131 tipc_printf(buf, "FRAGM::");
132 switch (msg_type(msg)) {
133 case FIRST_FRAGMENT:
134 tipc_printf(buf, "FIRST:");
135 break;
136 case FRAGMENT:
137 tipc_printf(buf, "BODY:");
138 break;
139 case LAST_FRAGMENT:
140 tipc_printf(buf, "LAST:");
141 break;
142 default:
143 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
144
145 }
146 tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg),
147 msg_fragm_no(msg));
148 break;
149 case TIPC_LOW_IMPORTANCE:
150 case TIPC_MEDIUM_IMPORTANCE:
151 case TIPC_HIGH_IMPORTANCE:
152 case TIPC_CRITICAL_IMPORTANCE:
153 tipc_printf(buf, "DAT%u:", msg_user(msg));
154 if (msg_short(msg)) {
155 tipc_printf(buf, "CON:");
156 break;
157 }
158 switch (msg_type(msg)) {
159 case TIPC_CONN_MSG:
160 tipc_printf(buf, "CON:");
161 break;
162 case TIPC_MCAST_MSG:
163 tipc_printf(buf, "MCST:");
164 break;
165 case TIPC_NAMED_MSG:
166 tipc_printf(buf, "NAM:");
167 break;
168 case TIPC_DIRECT_MSG:
169 tipc_printf(buf, "DIR:");
170 break;
171 default:
172 tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg));
173 }
174 if (msg_reroute_cnt(msg))
175 tipc_printf(buf, "REROUTED(%u):",
176 msg_reroute_cnt(msg));
177 break;
178 case NAME_DISTRIBUTOR:
179 tipc_printf(buf, "NMD::");
180 switch (msg_type(msg)) {
181 case PUBLICATION:
182 tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
183 break;
184 case WITHDRAWAL:
185 tipc_printf(buf, "WDRW:");
186 break;
187 default:
188 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
189 }
190 if (msg_reroute_cnt(msg))
191 tipc_printf(buf, "REROUTED(%u):",
192 msg_reroute_cnt(msg));
193 break;
194 case CONN_MANAGER:
195 tipc_printf(buf, "CONN_MNG:");
196 switch (msg_type(msg)) {
197 case CONN_PROBE:
198 tipc_printf(buf, "PROBE:");
199 break;
200 case CONN_PROBE_REPLY:
201 tipc_printf(buf, "PROBE_REPLY:");
202 break;
203 case CONN_ACK:
204 tipc_printf(buf, "CONN_ACK:");
205 tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg));
206 break;
207 default:
208 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
209 }
210 if (msg_reroute_cnt(msg))
211 tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg));
212 break;
213 case LINK_PROTOCOL:
214 switch (msg_type(msg)) {
215 case STATE_MSG:
216 tipc_printf(buf, "STATE:");
217 tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : "");
218 tipc_printf(buf, "NXS(%u):", msg_next_sent(msg));
219 tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg));
220 tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg));
221 break;
222 case RESET_MSG:
223 tipc_printf(buf, "RESET:");
224 if (msg_size(msg) != msg_hdr_sz(msg))
225 tipc_printf(buf, "BEAR:%s:", msg_data(msg));
226 break;
227 case ACTIVATE_MSG:
228 tipc_printf(buf, "ACTIVATE:");
229 break;
230 default:
231 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
232 }
233 tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg));
234 tipc_printf(buf, "SESS(%u):", msg_session(msg));
235 break;
236 case CHANGEOVER_PROTOCOL:
237 tipc_printf(buf, "TUNL:");
238 switch (msg_type(msg)) {
239 case DUPLICATE_MSG:
240 tipc_printf(buf, "DUPL:");
241 break;
242 case ORIGINAL_MSG:
243 tipc_printf(buf, "ORIG:");
244 tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg));
245 break;
246 default:
247 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
248 }
249 break;
250 case LINK_CONFIG:
251 tipc_printf(buf, "CFG:");
252 switch (msg_type(msg)) {
253 case DSC_REQ_MSG:
254 tipc_printf(buf, "DSC_REQ:");
255 break;
256 case DSC_RESP_MSG:
257 tipc_printf(buf, "DSC_RESP:");
258 break;
259 default:
260 tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg));
261 break;
262 }
263 break;
264 default:
265 tipc_printf(buf, "UNKNOWN USER:");
266 }
267
268 switch (usr) {
269 case CONN_MANAGER:
270 case TIPC_LOW_IMPORTANCE:
271 case TIPC_MEDIUM_IMPORTANCE:
272 case TIPC_HIGH_IMPORTANCE:
273 case TIPC_CRITICAL_IMPORTANCE:
274 switch (msg_errcode(msg)) {
275 case TIPC_OK:
276 break;
277 case TIPC_ERR_NO_NAME:
278 tipc_printf(buf, "NO_NAME:");
279 break;
280 case TIPC_ERR_NO_PORT:
281 tipc_printf(buf, "NO_PORT:");
282 break;
283 case TIPC_ERR_NO_NODE:
284 tipc_printf(buf, "NO_PROC:");
285 break;
286 case TIPC_ERR_OVERLOAD:
287 tipc_printf(buf, "OVERLOAD:");
288 break;
289 case TIPC_CONN_SHUTDOWN:
290 tipc_printf(buf, "SHUTDOWN:");
291 break;
292 default:
293 tipc_printf(buf, "UNKNOWN ERROR(%x):",
294 msg_errcode(msg));
295 }
296 default:
297 break;
298 }
299
300 tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
301 tipc_printf(buf, "SZ(%u):", msg_size(msg));
302 tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));
303
304 if (msg_non_seq(msg))
305 tipc_printf(buf, "NOSEQ:");
306 else
307 tipc_printf(buf, "ACK(%u):", msg_ack(msg));
308 tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
309 tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
310
311 if (msg_isdata(msg)) {
312 if (msg_named(msg)) {
313 tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
314 tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
315 }
316 }
317
318 if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
319 (usr != MSG_BUNDLER)) {
320 if (!msg_short(msg)) {
321 tipc_printf(buf, ":ORIG(%x:%u):",
322 msg_orignode(msg), msg_origport(msg));
323 tipc_printf(buf, ":DEST(%x:%u):",
324 msg_destnode(msg), msg_destport(msg));
325 } else {
326 tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
327 tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
328 }
329 }
330 if (msg_user(msg) == NAME_DISTRIBUTOR) {
331 tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
332 tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
333 }
334
335 if (msg_user(msg) == LINK_CONFIG) {
336 u32 *raw = (u32 *)msg;
337 struct tipc_media_addr *orig = (struct tipc_media_addr *)&raw[5];
338 tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
339 tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
340 tipc_media_addr_printf(buf, orig);
341 }
342 if (msg_user(msg) == BCAST_PROTOCOL) {
343 tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
344 tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
345 }
346 tipc_printf(buf, "\n");
347 if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg)))
348 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
349 if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT))
350 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
351}
352
353#endif