2 * rlm_sql_log.c Append the SQL queries in a log file which
3 * is read later by the radsqlrelay program
7 * Author: Nicolas Baradakis <nicolas.baradakis@cegetel.net>
9 * Copyright (C) 2005 Cegetel
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
26 #include <freeradius-devel/autoconf.h>
33 #include <freeradius-devel/libradius.h>
34 #include <freeradius-devel/radiusd.h>
35 #include <freeradius-devel/modules.h>
37 static const char rcsid[] = "$Id$";
39 static int sql_log_instantiate(CONF_SECTION *conf, void **instance);
40 static int sql_log_detach(void *instance);
41 static int sql_log_accounting(void *instance, REQUEST *request);
42 static int sql_log_postauth(void *instance, REQUEST *request);
44 #define MAX_QUERY_LEN 4096
47 * Define a structure for our module configuration.
49 typedef struct rlm_sql_log_t {
55 CONF_SECTION *conf_section;
59 * A mapping of configuration file names to internal variables.
61 static const CONF_PARSER module_config[] = {
62 {"path", PW_TYPE_STRING_PTR,
63 offsetof(rlm_sql_log_t,path), NULL, "${radacctdir}/sql-relay"},
64 {"Post-Auth", PW_TYPE_STRING_PTR,
65 offsetof(rlm_sql_log_t,postauth_query), NULL, ""},
66 {"sql_user_name", PW_TYPE_STRING_PTR,
67 offsetof(rlm_sql_log_t,sql_user_name), NULL, ""},
68 {"safe-characters", PW_TYPE_STRING_PTR,
69 offsetof(rlm_sql_log_t,allowed_chars), NULL,
70 "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
72 { NULL, -1, 0, NULL, NULL } /* end the list */
75 static char *allowed_chars = NULL;
78 * Do any per-module initialization that is separate to each
79 * configured instance of the module. e.g. set up connections
80 * to external databases, read configuration files, set up
81 * dictionary entries, etc.
83 * If configuration information is given in the config section
84 * that must be referenced in later calls, store a handle to it
85 * in *instance otherwise put a null pointer there.
87 static int sql_log_instantiate(CONF_SECTION *conf, void **instance)
93 * Set up a storage area for instance data.
95 inst = calloc(1, sizeof(rlm_sql_log_t));
97 radlog(L_ERR, "rlm_sql_log: Not enough memory");
102 * Get the name of the current section in the conf file.
104 name = cf_section_name2(conf);
106 name = cf_section_name1(conf);
109 inst->name = strdup(name);
112 * If the configuration parameters can't be parsed,
115 if (cf_section_parse(conf, inst, module_config) < 0) {
116 radlog(L_ERR, "rlm_sql_log (%s): Unable to parse parameters",
118 sql_log_detach(inst);
122 inst->conf_section = conf;
123 allowed_chars = inst->allowed_chars;
129 * Say goodbye to the cruel world.
131 static int sql_log_detach(void *instance)
135 rlm_sql_log_t *inst = (rlm_sql_log_t *)instance;
143 * Free up dynamically allocated string pointers.
145 for (i = 0; module_config[i].name != NULL; i++) {
146 if (module_config[i].type != PW_TYPE_STRING_PTR) {
151 * Treat 'config' as an opaque array of bytes,
152 * and take the offset into it. There's a
153 * (char*) pointer at that offset, and we want
156 p = (char **) (((char *)inst) + module_config[i].offset);
157 if (!*p) { /* nothing allocated */
163 allowed_chars = NULL;
169 * Translate the SQL queries.
171 static int sql_escape_func(char *out, int outlen, const char *in)
177 * Non-printable characters get replaced with their
178 * mime-encoded equivalents.
181 strchr(allowed_chars, *in) == NULL) {
183 * Only 3 or less bytes available.
189 snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
198 * Only one byte left.
218 * Add the 'SQL-User-Name' attribute to the packet.
220 static int sql_set_user(rlm_sql_log_t *inst, REQUEST *request, char *sqlusername, const char *username)
223 char tmpuser[MAX_STRING_LEN];
226 sqlusername[0] = '\0';
228 /* Remove any user attr we added previously */
229 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
231 if (username != NULL) {
232 strNcpy(tmpuser, username, MAX_STRING_LEN);
233 } else if (inst->sql_user_name[0] != '\0') {
234 radius_xlat(tmpuser, sizeof(tmpuser), inst->sql_user_name,
240 if (tmpuser[0] != '\0') {
241 strNcpy(sqlusername, tmpuser, sizeof(tmpuser));
242 DEBUG2("rlm_sql_log (%s): sql_set_user escaped user --> '%s'",
243 inst->name, sqlusername);
244 vp = pairmake("SQL-User-Name", sqlusername, 0);
246 radlog(L_ERR, "%s", librad_errstr);
250 pairadd(&request->packet->vps, vp);
257 * Replace %<whatever> in the query.
259 static int sql_xlat_query(rlm_sql_log_t *inst, REQUEST *request, const char *query, char *xlat_query, size_t len)
261 char sqlusername[MAX_STRING_LEN];
263 /* If query is not defined, we stop here */
264 if (query[0] == '\0')
265 return RLM_MODULE_NOOP;
267 /* Add attribute 'SQL-User-Name' */
268 if (sql_set_user(inst, request, sqlusername, NULL) <0) {
269 radlog(L_ERR, "rlm_sql_log (%s): Couldn't add SQL-User-Name attribute",
271 return RLM_MODULE_FAIL;
274 /* Expand variables in the query */
275 xlat_query[0] = '\0';
276 radius_xlat(xlat_query, len, query, request, sql_escape_func);
277 if (xlat_query[0] == '\0') {
278 radlog(L_ERR, "rlm_sql_log (%s): Couldn't xlat the query %s",
280 return RLM_MODULE_FAIL;
283 return RLM_MODULE_OK;
287 * The Perl version of radsqlrelay uses fcntl locks.
289 static int setlock(int fd)
292 memset(&fl, 0, sizeof(fl));
296 fl.l_whence = SEEK_SET;
297 return fcntl(fd, F_SETLKW, &fl);
301 * Write the line into file (with lock)
303 static int sql_log_write(rlm_sql_log_t *inst, REQUEST *request, const char *line)
309 char path[MAX_STRING_LEN];
312 radius_xlat(path, sizeof(path), inst->path, request, NULL);
314 return RLM_MODULE_FAIL;
317 if ((fd = open(path, O_WRONLY | O_APPEND | O_CREAT, 0666)) < 0) {
318 radlog(L_ERR, "rlm_sql_log (%s): Couldn't open file %s: %s",
319 inst->name, path, strerror(errno));
320 return RLM_MODULE_FAIL;
322 if (setlock(fd) != 0) {
323 radlog(L_ERR, "rlm_sql_log (%s): Couldn't lock file %s: %s",
324 inst->name, path, strerror(errno));
326 return RLM_MODULE_FAIL;
328 if (fstat(fd, &st) != 0) {
329 radlog(L_ERR, "rlm_sql_log (%s): Couldn't stat file %s: %s",
330 inst->name, path, strerror(errno));
332 return RLM_MODULE_FAIL;
334 if (st.st_nlink == 0) {
335 DEBUG("rlm_sql_log (%s): File %s removed by another program, retrying",
343 if ((fp = fdopen(fd, "a")) == NULL) {
344 radlog(L_ERR, "rlm_sql_log (%s): Couldn't associate a stream with file %s: %s",
345 inst->name, path, strerror(errno));
347 return RLM_MODULE_FAIL;
351 fclose(fp); /* and unlock */
352 return RLM_MODULE_OK;
356 * Write accounting information to this module's database.
358 static int sql_log_accounting(void *instance, REQUEST *request)
361 char querystr[MAX_QUERY_LEN];
363 rlm_sql_log_t *inst = (rlm_sql_log_t *)instance;
368 DEBUG("rlm_sql_log (%s): Processing sql_log_accounting", inst->name);
370 /* Find the Acct Status Type. */
371 if ((pair = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE)) == NULL) {
372 radlog(L_ERR, "rlm_sql_log (%s): Packet has no account status type",
374 return RLM_MODULE_INVALID;
377 /* Search the query in conf section of the module */
378 if ((dval = dict_valbyattr(PW_ACCT_STATUS_TYPE, pair->lvalue)) == NULL) {
379 radlog(L_ERR, "rlm_sql_log (%s): Unsupported Acct-Status-Type = %d",
380 inst->name, pair->lvalue);
381 return RLM_MODULE_NOOP;
383 if ((cp = cf_pair_find(inst->conf_section, dval->name)) == NULL) {
384 DEBUG("rlm_sql_log (%s): Couldn't find an entry %s in the config section",
385 inst->name, dval->name);
386 return RLM_MODULE_NOOP;
388 cfquery = cf_pair_value(cp);
391 ret = sql_xlat_query(inst, request, cfquery, querystr, sizeof(querystr));
392 if (ret != RLM_MODULE_OK)
395 /* Write query into sql-relay file */
396 return sql_log_write(inst, request, querystr);
400 * Write post-auth information to this module's database.
402 static int sql_log_postauth(void *instance, REQUEST *request)
405 char querystr[MAX_QUERY_LEN];
406 rlm_sql_log_t *inst = (rlm_sql_log_t *)instance;
408 DEBUG("rlm_sql_log (%s): Processing sql_log_postauth", inst->name);
411 ret = sql_xlat_query(inst, request, inst->postauth_query,
412 querystr, sizeof(querystr));
413 if (ret != RLM_MODULE_OK)
416 /* Write query into sql-relay file */
417 return sql_log_write(inst, request, querystr);
421 * The module name should be the only globally exported symbol.
422 * That is, everything else should be 'static'.
424 * If the module needs to temporarily modify it's instantiation
425 * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
426 * The server will then take care of ensuring that the module
427 * is single-threaded.
429 module_t rlm_sql_log = {
432 RLM_TYPE_THREAD_SAFE, /* type */
433 sql_log_instantiate, /* instantiation */
434 sql_log_detach, /* detach */
436 NULL, /* authentication */
437 NULL, /* authorization */
438 NULL, /* preaccounting */
439 sql_log_accounting, /* accounting */
440 NULL, /* checksimul */
441 NULL, /* pre-proxy */
442 NULL, /* post-proxy */
443 sql_log_postauth /* post-auth */