2 * sql.c rlm_sql - FreeRADIUS SQL Module
3 * Main code directly taken from ICRADIUS
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 * Copyright 2001,2006 The FreeRADIUS server project
22 * Copyright 2000 Mike Machado <mike@innercite.com>
23 * Copyright 2000 Alan DeKok <aland@ox.org>
24 * Copyright 2001 Chad Miller <cmiller@surfsouth.com>
29 #include <freeradius-devel/radiusd.h>
30 #include <freeradius-devel/rad_assert.h>
43 * Translate rlm_sql rcodes to humanly
44 * readable reason strings.
46 const FR_NAME_NUMBER sql_rcode_table[] = {
47 { "success", RLM_SQL_OK },
48 { "need alt query", RLM_SQL_ALT_QUERY },
49 { "server error", RLM_SQL_ERROR },
50 { "query invalid", RLM_SQL_QUERY_INVALID },
51 { "no connection", RLM_SQL_RECONNECT },
52 { "no more rows", RLM_SQL_NO_MORE_ROWS },
57 /*************************************************************************
59 * Function: sql_fr_pair_list_afrom_str
61 * Purpose: Read entries from the database and fill VALUE_PAIR structures
63 *************************************************************************/
64 int sql_fr_pair_list_afrom_str(TALLOC_CTX *ctx, REQUEST *request, VALUE_PAIR **head, rlm_sql_row_t row)
67 char const *ptr, *value;
68 char buf[MAX_STRING_LEN];
70 FR_TOKEN token, op = T_EOL;
73 * Verify the 'Attribute' field
75 if (!row[2] || row[2][0] == '\0') {
76 REDEBUG("Attribute field is empty or NULL, skipping the entire row");
81 * Verify the 'op' field
83 if (row[4] != NULL && row[4][0] != '\0') {
85 op = gettoken(&ptr, buf, sizeof(buf), false);
86 if (!fr_assignment_op[op] && !fr_equality_op[op]) {
87 REDEBUG("Invalid op \"%s\" for attribute %s", row[4], row[2]);
93 * Complain about empty or invalid 'op' field
96 REDEBUG("The op field for attribute '%s = %s' is NULL, or non-existent.", row[2], row[3]);
97 REDEBUG("You MUST FIX THIS if you want the configuration to behave as you expect");
101 * The 'Value' field may be empty or NULL
104 REDEBUG("Value field is empty or NULL, skipping the entire row");
111 * If we have a new-style quoted string, where the
112 * *entire* string is quoted, do xlat's.
114 if (row[3] != NULL &&
115 ((row[3][0] == '\'') || (row[3][0] == '`') || (row[3][0] == '"')) &&
116 (row[3][0] == row[3][strlen(row[3])-1])) {
118 token = gettoken(&value, buf, sizeof(buf), false);
121 * Take the unquoted string.
123 case T_SINGLE_QUOTED_STRING:
124 case T_DOUBLE_QUOTED_STRING:
129 * Mark the pair to be allocated later.
131 case T_BACK_QUOTED_STRING:
137 * Keep the original string.
148 vp = fr_pair_make(ctx, NULL, row[2], NULL, op);
150 REDEBUG("Failed to create the pair: %s", fr_strerror());
155 if (fr_pair_mark_xlat(vp, value) < 0) {
156 REDEBUG("Error marking pair for xlat: %s", fr_strerror());
162 if (fr_pair_value_from_str(vp, value, -1) < 0) {
163 REDEBUG("Error parsing value: %s", fr_strerror());
171 * Add the pair into the packet
173 fr_pair_add(head, vp);
177 /** Call the driver's sql_fetch_row function
179 * Calls the driver's sql_fetch_row logging any errors. On success, will
180 * write row data to (*handle)->row.
182 * @param inst Instance of rlm_sql.
183 * @param request The Current request, may be NULL.
184 * @param handle Handle to retrieve errors for.
185 * @return on success RLM_SQL_OK, other sql_rcode_t constants on error.
187 sql_rcode_t rlm_sql_fetch_row(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle)
191 if (!*handle || !(*handle)->conn) return RLM_SQL_ERROR;
194 * We can't implement reconnect logic here, because the caller
195 * may require the original connection to free up queries or
196 * result sets associated with that connection.
198 ret = (inst->module->sql_fetch_row)(*handle, inst->config);
200 MOD_ROPTIONAL(RERROR, ERROR, "Error fetching row");
202 rlm_sql_print_error(inst, request, *handle, false);
208 /** Retrieve any errors from the SQL driver
210 * Retrieves errors from the driver from the last operation and writes them to
211 * to request/global log, in the ERROR, WARN, INFO and DEBUG categories.
213 * @param inst Instance of rlm_sql.
214 * @param request Current request, may be NULL.
215 * @param handle Handle to retrieve errors for.
216 * @param force_debug Force all errors to be logged as debug messages.
218 void rlm_sql_print_error(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t *handle, bool force_debug)
221 sql_log_entry_t log[20];
224 num = (inst->module->sql_error)(handle->log_ctx, log, (sizeof(log) / sizeof(*log)), handle, inst->config);
226 MOD_ROPTIONAL(RERROR, ERROR, "Unknown error");
230 driver = inst->config->sql_driver_name;
232 for (i = 0; i < num; i++) {
233 if (force_debug) goto debug;
235 switch (log[i].type) {
237 MOD_ROPTIONAL(RERROR, ERROR, "%s: %s", driver, log[i].msg);
241 MOD_ROPTIONAL(RWARN, WARN, "%s: %s", driver, log[i].msg);
245 MOD_ROPTIONAL(RINFO, INFO, "%s: %s", driver, log[i].msg);
251 MOD_ROPTIONAL(RDEBUG, DEBUG, "%s: %s", driver, log[i].msg);
256 talloc_free_children(handle->log_ctx);
259 /** Call the driver's sql_query method, reconnecting if necessary.
261 * @note Caller must call (inst->module->sql_finish_query)(handle, inst->config);
262 * after they're done with the result.
264 * @param handle to query the database with. *handle should not be NULL, as this indicates
265 * previous reconnection attempt has failed.
266 * @param request Current request.
267 * @param inst rlm_sql instance data.
268 * @param query to execute. Should not be zero length.
269 * @return RLM_SQL_OK on success, RLM_SQL_RECONNECT if a new handle is required
270 * (also sets *handle = NULL), RLM_SQL_QUERY_INVALID/RLM_SQL_ERROR on invalid query or
271 * connection error, RLM_SQL_ALT_QUERY on constraints violation.
273 sql_rcode_t rlm_sql_query(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle, char const *query)
275 int ret = RLM_SQL_ERROR;
278 /* Caller should check they have a valid handle */
281 /* There's no query to run, return an error */
282 if (query[0] == '\0') {
283 if (request) REDEBUG("Zero length query");
284 return RLM_SQL_QUERY_INVALID;
288 * inst->pool may be NULL is this function is called by mod_conn_create.
290 count = inst->pool ? fr_connection_pool_get_num(inst->pool) : 0;
293 * Here we try with each of the existing connections, then try to create
294 * a new connection, then give up.
296 for (i = 0; i < (count + 1); i++) {
297 MOD_ROPTIONAL(RDEBUG2, DEBUG2, "Executing query: %s", query);
299 ret = (inst->module->sql_query)(*handle, inst->config, query);
305 * Run through all available sockets until we exhaust all existing
306 * sockets in the pool and fail to establish a *new* connection.
308 case RLM_SQL_RECONNECT:
309 *handle = fr_connection_reconnect(inst->pool, *handle);
310 /* Reconnection failed */
311 if (!*handle) return RLM_SQL_RECONNECT;
312 /* Reconnection succeeded, try again with the new handle */
316 * These are bad and should make rlm_sql return invalid
318 case RLM_SQL_QUERY_INVALID:
319 rlm_sql_print_error(inst, request, *handle, false);
320 (inst->module->sql_finish_query)(*handle, inst->config);
324 * Server or client errors.
326 * If the driver claims to be able to distinguish between
327 * duplicate row errors and other errors, and we hit a
328 * general error treat it as a failure.
330 * Otherwise rewrite it to RLM_SQL_ALT_QUERY.
333 if (inst->module->flags & RLM_SQL_RCODE_FLAGS_ALT_QUERY) {
334 rlm_sql_print_error(inst, request, *handle, false);
335 (inst->module->sql_finish_query)(*handle, inst->config);
338 ret = RLM_SQL_ALT_QUERY;
342 * Driver suggested using an alternative query
344 case RLM_SQL_ALT_QUERY:
345 rlm_sql_print_error(inst, request, *handle, true);
346 (inst->module->sql_finish_query)(*handle, inst->config);
354 MOD_ROPTIONAL(RERROR, ERROR, "Hit reconnection limit");
356 return RLM_SQL_ERROR;
359 /** Call the driver's sql_select_query method, reconnecting if necessary.
361 * @note Caller must call (inst->module->sql_finish_select_query)(handle, inst->config);
362 * after they're done with the result.
364 * @param inst rlm_sql instance data.
365 * @param request Current request.
366 * @param handle to query the database with. *handle should not be NULL, as this indicates
367 * previous reconnection attempt has failed.
368 * @param query to execute. Should not be zero length.
369 * @return RLM_SQL_OK on success, RLM_SQL_RECONNECT if a new handle is required (also sets *handle = NULL),
370 * RLM_SQL_QUERY_INVALID/RLM_SQL_ERROR on invalid query or connection error.
372 sql_rcode_t rlm_sql_select_query(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle, char const *query)
374 int ret = RLM_SQL_ERROR;
377 /* Caller should check they have a valid handle */
380 /* There's no query to run, return an error */
381 if (query[0] == '\0') {
382 if (request) REDEBUG("Zero length query");
384 return RLM_SQL_QUERY_INVALID;
388 * inst->pool may be NULL is this function is called by mod_conn_create.
390 count = inst->pool ? fr_connection_pool_get_num(inst->pool) : 0;
393 * For sanity, for when no connections are viable, and we can't make a new one
395 for (i = 0; i < (count + 1); i++) {
396 MOD_ROPTIONAL(RDEBUG2, DEBUG2, "Executing select query: %s", query);
398 ret = (inst->module->sql_select_query)(*handle, inst->config, query);
404 * Run through all available sockets until we exhaust all existing
405 * sockets in the pool and fail to establish a *new* connection.
407 case RLM_SQL_RECONNECT:
408 *handle = fr_connection_reconnect(inst->pool, *handle);
409 /* Reconnection failed */
410 if (!*handle) return RLM_SQL_RECONNECT;
411 /* Reconnection succeeded, try again with the new handle */
414 case RLM_SQL_QUERY_INVALID:
417 rlm_sql_print_error(inst, request, *handle, false);
418 (inst->module->sql_finish_select_query)(*handle, inst->config);
425 MOD_ROPTIONAL(RERROR, ERROR, "Hit reconnection limit");
427 return RLM_SQL_ERROR;
431 /*************************************************************************
433 * Function: sql_getvpdata
435 * Purpose: Get any group check or reply pairs
437 *************************************************************************/
438 int sql_getvpdata(TALLOC_CTX *ctx, rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle,
439 VALUE_PAIR **pair, char const *query)
447 rcode = rlm_sql_select_query(inst, request, handle, query);
448 if (rcode != RLM_SQL_OK) return -1; /* error handled by rlm_sql_select_query */
450 while (rlm_sql_fetch_row(inst, request, handle) == RLM_SQL_OK) {
451 row = (*handle)->row;
453 if (sql_fr_pair_list_afrom_str(ctx, request, pair, row) != 0) {
454 REDEBUG("Error parsing user data from database result");
456 (inst->module->sql_finish_select_query)(*handle, inst->config);
462 (inst->module->sql_finish_select_query)(*handle, inst->config);
468 * Log the query to a file.
470 void rlm_sql_query_log(rlm_sql_t *inst, REQUEST *request,
471 sql_acct_section_t *section, char const *query)
474 char const *filename = NULL;
475 char *expanded = NULL;
477 bool failed = false; /* Write the log message outside of the critical region */
479 filename = inst->config->logfile;
480 if (section && section->logfile) filename = section->logfile;
482 if (!filename || !*filename) {
486 if (radius_axlat(&expanded, request, filename, NULL, NULL) < 0) {
490 fd = exfile_open(inst->ef, filename, 0640, true);
492 ERROR("rlm_sql (%s): Couldn't open logfile '%s': %s", inst->name,
493 expanded, fr_syserror(errno));
495 talloc_free(expanded);
500 if ((write(fd, query, len) < 0) || (write(fd, ";\n", 2) < 0)) {
505 ERROR("rlm_sql (%s): Failed writing to logfile '%s': %s", inst->name, expanded,
509 talloc_free(expanded);
510 exfile_close(inst->ef, fd);