Line data Source code
1 : /* FreeTDS - Library of routines accessing Sybase and Microsoft databases
2 : * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Brian Bruns
3 : * Copyright (C) 2011 Frediano Ziglio
4 : *
5 : * This library is free software; you can redistribute it and/or
6 : * modify it under the terms of the GNU Library General Public
7 : * License as published by the Free Software Foundation; either
8 : * version 2 of the License, or (at your option) any later version.
9 : *
10 : * This library is distributed in the hope that it will be useful,
11 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 : * Library General Public License for more details.
14 : *
15 : * You should have received a copy of the GNU Library General Public
16 : * License along with this library; if not, write to the
17 : * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 : * Boston, MA 02111-1307, USA.
19 : */
20 :
21 : #include <config.h>
22 :
23 : #if HAVE_STRING_H
24 : #include <string.h>
25 : #endif /* HAVE_STRING_H */
26 :
27 : #include <freetds/utils.h>
28 : #include "cspublic.h"
29 : #include "ctlib.h"
30 : #include "syberror.h"
31 : #include <freetds/tds.h>
32 : #include <freetds/replacements.h>
33 : /* #include "fortify.h" */
34 :
35 :
36 : /*
37 : * test include consistency
38 : * I don't think all compiler are able to compile this code... if not comment it
39 : */
40 : #if ENABLE_EXTRA_CHECKS
41 :
42 : #define TEST_EQUAL(t,a,b) TDS_COMPILE_CHECK(t,a==b)
43 :
44 : TEST_EQUAL(t03,CS_NULLTERM,TDS_NULLTERM);
45 : TEST_EQUAL(t04,CS_CMD_SUCCEED,TDS_CMD_SUCCEED);
46 : TEST_EQUAL(t05,CS_CMD_FAIL,TDS_CMD_FAIL);
47 : TEST_EQUAL(t06,CS_CMD_DONE,TDS_CMD_DONE);
48 : TEST_EQUAL(t07,CS_NO_COUNT,TDS_NO_COUNT);
49 : TEST_EQUAL(t08,CS_COMPUTE_RESULT,TDS_COMPUTE_RESULT);
50 : TEST_EQUAL(t09,CS_PARAM_RESULT,TDS_PARAM_RESULT);
51 : TEST_EQUAL(t10,CS_ROW_RESULT,TDS_ROW_RESULT);
52 : TEST_EQUAL(t11,CS_STATUS_RESULT,TDS_STATUS_RESULT);
53 : TEST_EQUAL(t12,CS_COMPUTEFMT_RESULT,TDS_COMPUTEFMT_RESULT);
54 : TEST_EQUAL(t13,CS_ROWFMT_RESULT,TDS_ROWFMT_RESULT);
55 : TEST_EQUAL(t14,CS_MSG_RESULT,TDS_MSG_RESULT);
56 : TEST_EQUAL(t15,CS_DESCRIBE_RESULT,TDS_DESCRIBE_RESULT);
57 :
58 : #define TEST_ATTRIBUTE(t,sa,fa,sb,fb) \
59 : TDS_COMPILE_CHECK(t,sizeof(((sa*)0)->fa) == sizeof(((sb*)0)->fb) && TDS_OFFSET(sa,fa) == TDS_OFFSET(sb,fb))
60 :
61 : TEST_ATTRIBUTE(t21,TDS_MONEY4,mny4,CS_MONEY4,mny4);
62 : TEST_ATTRIBUTE(t22,TDS_OLD_MONEY,mnyhigh,CS_MONEY,mnyhigh);
63 : TEST_ATTRIBUTE(t23,TDS_OLD_MONEY,mnylow,CS_MONEY,mnylow);
64 : TEST_ATTRIBUTE(t24,TDS_DATETIME,dtdays,CS_DATETIME,dtdays);
65 : TEST_ATTRIBUTE(t25,TDS_DATETIME,dttime,CS_DATETIME,dttime);
66 : TEST_ATTRIBUTE(t26,TDS_DATETIME4,days,CS_DATETIME4,days);
67 : TEST_ATTRIBUTE(t27,TDS_DATETIME4,minutes,CS_DATETIME4,minutes);
68 : TEST_ATTRIBUTE(t28,TDS_NUMERIC,precision,CS_NUMERIC,precision);
69 : TEST_ATTRIBUTE(t29,TDS_NUMERIC,scale,CS_NUMERIC,scale);
70 : TEST_ATTRIBUTE(t30,TDS_NUMERIC,array,CS_NUMERIC,array);
71 : TEST_ATTRIBUTE(t30,TDS_NUMERIC,precision,CS_DECIMAL,precision);
72 : TEST_ATTRIBUTE(t31,TDS_NUMERIC,scale,CS_DECIMAL,scale);
73 : TEST_ATTRIBUTE(t32,TDS_NUMERIC,array,CS_DECIMAL,array);
74 : #endif
75 :
76 : static int
77 : _ct_translate_severity(int tds_severity)
78 : {
79 12 : switch (tds_severity) {
80 : case EXINFO:
81 : return CS_SV_INFORM; /* unused */
82 : case EXUSER:
83 : return CS_SV_CONFIG_FAIL;
84 : case EXNONFATAL:
85 : return CS_SV_INTERNAL_FAIL; /* unused */
86 : case EXCONVERSION:
87 : return CS_SV_API_FAIL;
88 : case EXSERVER:
89 : return CS_SV_INTERNAL_FAIL; /* unused */
90 : case EXTIME:
91 : return CS_SV_RETRY_FAIL;
92 : case EXPROGRAM:
93 : return CS_SV_API_FAIL;
94 : case EXRESOURCE:
95 : return CS_SV_RESOURCE_FAIL; /* unused */
96 : case EXCOMM:
97 : return CS_SV_COMM_FAIL;
98 : case EXFATAL:
99 : return CS_SV_FATAL; /* unused */
100 : case EXCONSISTENCY:
101 : default:
102 : return CS_SV_INTERNAL_FAIL;
103 : }
104 : }
105 :
106 : /*
107 : * error handler
108 : * This callback function should be invoked only from libtds through tds_ctx->err_handler.
109 : */
110 : int
111 12 : _ct_handle_client_message(const TDSCONTEXT * ctx_tds, TDSSOCKET * tds, TDSMESSAGE * msg)
112 : {
113 : CS_CLIENTMSG errmsg;
114 12 : CS_CONNECTION *con = NULL;
115 12 : CS_CONTEXT *ctx = NULL;
116 12 : int ret = (int) CS_SUCCEED;
117 :
118 12 : tdsdump_log(TDS_DBG_FUNC, "_ct_handle_client_message(%p, %p, %p)\n", ctx_tds, tds, msg);
119 :
120 12 : if (tds && tds_get_parent(tds)) {
121 12 : con = (CS_CONNECTION *) tds_get_parent(tds);
122 : }
123 :
124 12 : memset(&errmsg, '\0', sizeof(errmsg));
125 12 : errmsg.msgnumber = msg->msgno;
126 24 : errmsg.severity = _ct_translate_severity(msg->severity);
127 12 : strlcpy(errmsg.msgstring, msg->message, sizeof(errmsg.msgstring));
128 12 : errmsg.msgstringlen = strlen(errmsg.msgstring);
129 12 : errmsg.osstring[0] = '\0';
130 12 : errmsg.osstringlen = 0;
131 : /* if there is no connection, attempt to call the context handler */
132 12 : if (!con) {
133 0 : ctx = (CS_CONTEXT *) ctx_tds->parent;
134 0 : if (ctx->_clientmsg_cb)
135 0 : ret = ctx->_clientmsg_cb(ctx, con, &errmsg);
136 12 : } else if (con->_clientmsg_cb)
137 0 : ret = con->_clientmsg_cb(con->ctx, con, &errmsg);
138 12 : else if (con->ctx->_clientmsg_cb)
139 4 : ret = con->ctx->_clientmsg_cb(con->ctx, con, &errmsg);
140 :
141 : /*
142 : * The return code from the error handler is either CS_SUCCEED or CS_FAIL.
143 : * This function was called by libtds with some kind of communications failure, and there are
144 : * no cases in which "succeed" could mean anything: In most cases, the function is going to fail
145 : * no matter what.
146 : *
147 : * Timeouts are a different matter; it's up to the client to decide whether to continue
148 : * waiting or to abort the operation and close the socket. ct-lib applications do their
149 : * own cancel processing -- they can call ct_cancel from within the error handler -- so
150 : * they don't need to return TDS_INT_TIMEOUT. They can, however, return TDS_INT_CONTINUE
151 : * or TDS_INT_CANCEL. We map the client's return code to those.
152 : *
153 : * Only for timeout errors does TDS_INT_CANCEL cause libtds to break the connection.
154 : */
155 12 : if (msg->msgno == TDSETIME) {
156 0 : switch (ret) {
157 : case CS_SUCCEED: return TDS_INT_CONTINUE;
158 0 : case CS_FAIL: return TDS_INT_CANCEL;
159 : }
160 : }
161 12 : return TDS_INT_CANCEL;
162 : }
163 :
164 : /* message handler */
165 : TDSRET
166 3220 : _ct_handle_server_message(const TDSCONTEXT * ctx_tds, TDSSOCKET * tds, TDSMESSAGE * msg)
167 : {
168 : CS_SERVERMSG_INTERNAL errmsg;
169 3220 : CS_CONNECTION *con = NULL;
170 : CS_CONTEXT *ctx;
171 : CS_SERVERMSG_COMMON2 *common2;
172 3220 : CS_RETCODE ret = CS_SUCCEED;
173 :
174 3220 : tdsdump_log(TDS_DBG_FUNC, "_ct_handle_server_message(%p, %p, %p)\n", ctx_tds, tds, msg);
175 :
176 3220 : if (tds && tds_get_parent(tds))
177 3220 : con = (CS_CONNECTION *) tds_get_parent(tds);
178 :
179 3220 : ctx = con ? con->ctx : (CS_CONTEXT *) ctx_tds->parent;
180 :
181 3220 : memset(&errmsg, '\0', sizeof(errmsg));
182 3220 : errmsg.common.msgnumber = msg->msgno;
183 3220 : strlcpy(errmsg.common.text, msg->message, sizeof(errmsg.common.text));
184 3220 : errmsg.common.textlen = strlen(errmsg.common.text);
185 3220 : errmsg.common.state = msg->state;
186 3220 : errmsg.common.severity = msg->severity;
187 :
188 : #define MIDDLE_PART(part) do { \
189 : common2 = (CS_SERVERMSG_COMMON2 *) &(errmsg.part.line); \
190 : if (msg->server) { \
191 : errmsg.part.svrnlen = strlen(msg->server); \
192 : strlcpy(errmsg.part.svrname, msg->server, sizeof(errmsg.part.svrname)); \
193 : } \
194 : if (msg->proc_name) { \
195 : errmsg.part.proclen = strlen(msg->proc_name); \
196 : strlcpy(errmsg.part.proc, msg->proc_name, sizeof(errmsg.part.proc)); \
197 : } \
198 : } while(0)
199 :
200 3220 : if (ctx->use_large_identifiers)
201 1610 : MIDDLE_PART(large);
202 : else
203 1610 : MIDDLE_PART(small);
204 : #undef MIDDLE_PART
205 :
206 3220 : common2->sqlstate[0] = 0;
207 3220 : if (msg->sql_state)
208 64 : strlcpy((char *) common2->sqlstate, msg->sql_state, sizeof(common2->sqlstate));
209 3220 : common2->sqlstatelen = strlen((char *) common2->sqlstate);
210 3220 : common2->line = msg->line_number;
211 :
212 : /* if there is no connection, attempt to call the context handler */
213 3220 : if (!con) {
214 0 : if (ctx->_servermsg_cb)
215 0 : ret = ctx->_servermsg_cb(ctx, con, &errmsg.user);
216 3220 : } else if (con->_servermsg_cb) {
217 8 : ret = con->_servermsg_cb(ctx, con, &errmsg.user);
218 3212 : } else if (ctx->_servermsg_cb) {
219 3206 : ret = ctx->_servermsg_cb(ctx, con, &errmsg.user);
220 : }
221 3214 : return ret == CS_SUCCEED ? TDS_SUCCESS : TDS_FAIL;
222 : }
223 :
224 : /**
225 : * Check if a give version supports large identifiers.
226 : */
227 : bool
228 2160 : _ct_is_large_identifiers_version(CS_INT version)
229 : {
230 2160 : switch (version) {
231 : case 112:
232 : case 1100:
233 : case 12500:
234 : case 15000:
235 : return false;
236 : }
237 1080 : return true;
238 : }
239 :
240 : const CS_DATAFMT_COMMON *
241 1770 : _ct_datafmt_common(CS_CONTEXT * ctx, const CS_DATAFMT * datafmt)
242 : {
243 1770 : if (!datafmt)
244 : return NULL;
245 1770 : if (ctx->use_large_identifiers)
246 885 : return (const CS_DATAFMT_COMMON *) &(((const CS_DATAFMT_LARGE *) datafmt)->datatype);
247 885 : return (const CS_DATAFMT_COMMON *) &(((const CS_DATAFMT_SMALL *) datafmt)->datatype);
248 : }
249 :
250 : /**
251 : * Converts CS_DATAFMT input parameter to CS_DATAFMT_LARGE.
252 : * @param ctx CTLib context
253 : * @param datafmt Input parameter
254 : * @param fmtbuf Buffer to use in case conversion is required
255 : * @return parameter converted to large
256 : */
257 : const CS_DATAFMT_LARGE *
258 292 : _ct_datafmt_conv_in(CS_CONTEXT * ctx, const CS_DATAFMT * datafmt, CS_DATAFMT_LARGE *fmtbuf)
259 : {
260 : const CS_DATAFMT_SMALL *small;
261 :
262 292 : if (!datafmt)
263 : return NULL;
264 :
265 : /* read directly from input */
266 292 : if (ctx->use_large_identifiers)
267 : return (CS_DATAFMT_LARGE *) datafmt;
268 :
269 : /* convert small format to large */
270 146 : small = (const CS_DATAFMT_SMALL *) datafmt;
271 :
272 146 : strlcpy(fmtbuf->name, small->name, sizeof(fmtbuf->name));
273 146 : fmtbuf->namelen = strlen(fmtbuf->name);
274 146 : *((CS_DATAFMT_COMMON *) &fmtbuf->datatype) = *((CS_DATAFMT_COMMON *) &small->datatype);
275 146 : return fmtbuf;
276 : }
277 :
278 : /**
279 : * Prepares to Convert CS_DATAFMT output parameter to CS_DATAFMT_LARGE.
280 : * @param ctx CTLib context
281 : * @param datafmt Input parameter
282 : * @param fmtbuf Buffer to use in case conversion is required
283 : * @return parameter converted to large
284 : */
285 : CS_DATAFMT_LARGE *
286 728 : _ct_datafmt_conv_prepare(CS_CONTEXT * ctx, CS_DATAFMT * datafmt, CS_DATAFMT_LARGE *fmtbuf)
287 : {
288 728 : if (!datafmt)
289 : return NULL;
290 :
291 : /* write directly to output */
292 728 : if (ctx->use_large_identifiers)
293 : return (CS_DATAFMT_LARGE *) datafmt;
294 :
295 364 : return fmtbuf;
296 : }
297 :
298 : /**
299 : * Converts CS_DATAFMT output parameter to CS_DATAFMT_LARGE after setting it.
300 : * @param datafmt Input parameter
301 : * @param fmtbuf Buffer to use in case conversion is required. You should pass
302 : * value returned by _ct_datafmt_conv_prepare().
303 : */
304 : void
305 728 : _ct_datafmt_conv_back(CS_DATAFMT * datafmt, CS_DATAFMT_LARGE *fmtbuf)
306 : {
307 : CS_DATAFMT_SMALL *small;
308 :
309 : /* already right format */
310 728 : if ((void *) datafmt == (void*) fmtbuf)
311 : return;
312 :
313 : /* convert large format to small */
314 364 : small = (CS_DATAFMT_SMALL *) datafmt;
315 :
316 364 : strlcpy(small->name, fmtbuf->name, sizeof(small->name));
317 364 : small->namelen = strlen(small->name);
318 364 : *((CS_DATAFMT_COMMON *) &small->datatype) = *((CS_DATAFMT_COMMON *) &fmtbuf->datatype);
319 : }
320 :
321 : /**
322 : * Get length of a string buffer
323 : *
324 : * @return length of string or original negative value if error.
325 : */
326 : static CS_INT
327 : _ct_get_string_length(const char *buf, CS_INT buflen)
328 : {
329 0 : if (buflen >= 0)
330 : return buflen;
331 :
332 0 : if (buflen == CS_NULLTERM)
333 0 : return (CS_INT) strlen(buf);
334 :
335 : return buflen;
336 : }
337 :
338 : CS_RETCODE
339 0 : _ct_props_dstr(CS_CONNECTION * con, DSTR *s, CS_INT action, CS_VOID * buffer, CS_INT buflen, CS_INT * out_len)
340 : {
341 0 : if (action == CS_SET) {
342 0 : buflen = _ct_get_string_length(buffer, buflen);
343 0 : if (buflen < 0) {
344 : /* TODO what error ?? */
345 : /* _ctclient_msg(NULL, con, "ct_con_props(SET,APPNAME)", 1, 1, 1, 5, "%d, %s", buflen, "buflen"); */
346 : return CS_FAIL;
347 : }
348 0 : if (tds_dstr_copyn(s, buffer, buflen) != NULL)
349 : return CS_SUCCEED;
350 0 : } else if (action == CS_GET) {
351 0 : if (out_len)
352 0 : *out_len = tds_dstr_len(s);
353 0 : strlcpy((char *) buffer, tds_dstr_cstr(s), buflen);
354 0 : return CS_SUCCEED;
355 0 : } else if (action == CS_CLEAR) {
356 0 : tds_dstr_empty(s);
357 0 : return CS_SUCCEED;
358 : }
359 : return CS_FAIL;
360 : }
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