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/*
* This program is is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* $Id$
* @file rlm_sql.c
* @brief Implements SQL 'users' file, and SQL accounting.
*
* @copyright 2012-2014 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
* @copyright 2000,2006 The FreeRADIUS server project
* @copyright 2000 Mike Machado <mike@innercite.com>
* @copyright 2000 Alan DeKok <aland@ox.org>
*/
RCSID("$Id$")
#include <ctype.h>
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modules.h>
#include <freeradius-devel/token.h>
#include <freeradius-devel/rad_assert.h>
#include <freeradius-devel/exfile.h>
#include <sys/stat.h>
#include "rlm_sql.h"
/*
* So we can do pass2 xlat checks on the queries.
*/
static const CONF_PARSER query_config[] = {
{ "query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT | PW_TYPE_MULTI, rlm_sql_config_t, accounting.query), NULL },
CONF_PARSER_TERMINATOR
};
/*
* For now hard-code the subsections. This isn't perfect, but it
* helps the average case.
*/
static const CONF_PARSER type_config[] = {
{ "accounting-on", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
{ "accounting-off", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
{ "start", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
{ "interim-update", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
{ "stop", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
CONF_PARSER_TERMINATOR
};
static const CONF_PARSER acct_config[] = {
{ "reference", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, accounting.reference), ".query" },
{ "logfile", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, accounting.logfile), NULL },
{ "type", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) type_config },
CONF_PARSER_TERMINATOR
};
static const CONF_PARSER postauth_config[] = {
{ "reference", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, postauth.reference), ".query" },
{ "logfile", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, postauth.logfile), NULL },
{ "query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT | PW_TYPE_MULTI, rlm_sql_config_t, postauth.query), NULL },
CONF_PARSER_TERMINATOR
};
static const CONF_PARSER module_config[] = {
{ "driver", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_driver_name), "rlm_sql_null" },
{ "server", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_server), "" }, /* Must be zero length so drivers can determine if it was set */
{ "port", FR_CONF_OFFSET(PW_TYPE_INTEGER, rlm_sql_config_t, sql_port), "0" },
{ "login", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_login), "" },
{ "password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, rlm_sql_config_t, sql_password), "" },
{ "radius_db", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_db), "radius" },
{ "read_groups", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, read_groups), "yes" },
{ "read_profiles", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, read_profiles), "yes" },
{ "readclients", FR_CONF_OFFSET(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, rlm_sql_config_t, do_clients), NULL },
{ "read_clients", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, do_clients), "no" },
{ "deletestalesessions", FR_CONF_OFFSET(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, rlm_sql_config_t, delete_stale_sessions), NULL },
{ "delete_stale_sessions", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, delete_stale_sessions), "yes" },
{ "sql_user_name", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, query_user), "" },
{ "logfile", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, logfile), NULL },
{ "default_user_profile", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, default_profile), "" },
{ "nas_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_DEPRECATED, rlm_sql_config_t, client_query), NULL },
{ "client_query", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, client_query), "SELECT id,nasname,shortname,type,secret FROM nas" },
{ "open_query", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, connect_query), NULL },
{ "authorize_check_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_check_query), NULL },
{ "authorize_reply_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_reply_query), NULL },
{ "authorize_group_check_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_group_check_query), NULL },
{ "authorize_group_reply_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_group_reply_query), NULL },
{ "group_membership_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, groupmemb_query), NULL },
#ifdef WITH_SESSION_MGMT
{ "simul_count_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, simul_count_query), NULL },
{ "simul_verify_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, simul_verify_query), NULL },
#endif
{ "safe-characters", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_DEPRECATED, rlm_sql_config_t, allowed_chars), NULL },
{ "safe_characters", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, allowed_chars), "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /" },
{ "auto_escape", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, driver_specific_escape), "no" },
/*
* This only works for a few drivers.
*/
{ "query_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, rlm_sql_config_t, query_timeout), NULL },
{ "accounting", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) acct_config },
{ "post-auth", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) postauth_config },
CONF_PARSER_TERMINATOR
};
static size_t sql_escape_for_xlat_func(REQUEST *request, char *out, size_t outlen, char const *in, void *arg);
/*
* Fall-Through checking function from rlm_files.c
*/
static sql_fall_through_t fall_through(VALUE_PAIR *vp)
{
VALUE_PAIR *tmp;
tmp = fr_pair_find_by_num(vp, PW_FALL_THROUGH, 0, TAG_ANY);
return tmp ? tmp->vp_integer : FALL_THROUGH_DEFAULT;
}
/*
* Yucky prototype.
*/
static int generate_sql_clients(rlm_sql_t *inst);
static size_t sql_escape_func(REQUEST *, char *out, size_t outlen, char const *in, void *arg);
/*
* SQL xlat function
*
* For selects the first value of the first column will be returned,
* for inserts, updates and deletes the number of rows affected will be
* returned instead.
*/
static ssize_t sql_xlat(void *instance, REQUEST *request, char const *query, char *out, size_t freespace)
{
rlm_sql_handle_t *handle = NULL;
rlm_sql_row_t row;
rlm_sql_t *inst = instance;
sql_rcode_t rcode;
ssize_t ret = 0;
size_t len = 0;
char const *p;
/*
* Add SQL-User-Name attribute just in case it is needed
* We could search the string fmt for SQL-User-Name to see if this is
* needed or not
*/
sql_set_user(inst, request, NULL);
handle = fr_connection_get(inst->pool); /* connection pool should produce error */
if (!handle) return 0;
rlm_sql_query_log(inst, request, NULL, query);
/*
* Trim whitespace for the prefix check
*/
for (p = query; is_whitespace(p); p++);
/*
* If the query starts with any of the following prefixes,
* then return the number of rows affected
*/
if ((strncasecmp(p, "insert", 6) == 0) ||
(strncasecmp(p, "update", 6) == 0) ||
(strncasecmp(p, "delete", 6) == 0)) {
int numaffected;
char buffer[21]; /* 64bit max is 20 decimal chars + null byte */
rcode = rlm_sql_query(inst, request, &handle, query);
if (rcode != RLM_SQL_OK) {
query_error:
RERROR("SQL query failed: %s", fr_int2str(sql_rcode_table, rcode, "<INVALID>"));
ret = -1;
goto finish;
}
numaffected = (inst->module->sql_affected_rows)(handle, inst->config);
if (numaffected < 1) {
RDEBUG("SQL query affected no rows");
(inst->module->sql_finish_query)(handle, inst->config);
goto finish;
}
/*
* Don't chop the returned number if freespace is
* too small. This hack is necessary because
* some implementations of snprintf return the
* size of the written data, and others return
* the size of the data they *would* have written
* if the output buffer was large enough.
*/
snprintf(buffer, sizeof(buffer), "%d", numaffected);
len = strlen(buffer);
if (len >= freespace){
RDEBUG("rlm_sql (%s): Can't write result, insufficient string space", inst->name);
(inst->module->sql_finish_query)(handle, inst->config);
ret = -1;
goto finish;
}
memcpy(out, buffer, len + 1); /* we did bounds checking above */
ret = len;
(inst->module->sql_finish_query)(handle, inst->config);
goto finish;
} /* else it's a SELECT statement */
rcode = rlm_sql_select_query(inst, request, &handle, query);
if (rcode != RLM_SQL_OK) goto query_error;
rcode = rlm_sql_fetch_row(inst, request, &handle);
if (rcode < 0) {
(inst->module->sql_finish_select_query)(handle, inst->config);
goto query_error;
}
row = handle->row;
if (!row) {
RDEBUG("SQL query returned no results");
(inst->module->sql_finish_select_query)(handle, inst->config);
ret = -1;
goto finish;
}
if (!row[0]){
RDEBUG("NULL value in first column of result");
(inst->module->sql_finish_select_query)(handle, inst->config);
ret = -1;
goto finish;
}
len = strlen(row[0]);
if (len >= freespace){
RDEBUG("Insufficient string space");
(inst->module->sql_finish_select_query)(handle, inst->config);
ret = -1;
goto finish;
}
strlcpy(out, row[0], freespace);
ret = len;
(inst->module->sql_finish_select_query)(handle, inst->config);
finish:
fr_connection_release(inst->pool, handle);
return ret;
}
static int generate_sql_clients(rlm_sql_t *inst)
{
rlm_sql_handle_t *handle;
rlm_sql_row_t row;
unsigned int i = 0;
RADCLIENT *c;
DEBUG("rlm_sql (%s): Processing generate_sql_clients",
inst->name);
DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
inst->name, inst->config->client_query);
handle = fr_connection_get(inst->pool);
if (!handle) return -1;
if (rlm_sql_select_query(inst, NULL, &handle, inst->config->client_query) != RLM_SQL_OK) return -1;
while ((rlm_sql_fetch_row(inst, NULL, &handle) == RLM_SQL_OK) && (row = handle->row)) {
int num_rows;
char *server = NULL;
i++;
num_rows = (inst->module->sql_num_fields)(handle, inst->config);
if (num_rows < 5) {
WARN("SELECT returned too few fields. Please do not edit 'client_query'");
continue;
}
/*
* The return data for each row MUST be in the following order:
*
* 0. Row ID (currently unused)
* 1. Name (or IP address)
* 2. Shortname
* 3. Type
* 4. Secret
* 5. Virtual Server (optional)
*/
if (!row[0]){
ERROR("rlm_sql (%s): No row id found on pass %d",inst->name,i);
continue;
}
if (!row[1]){
ERROR("rlm_sql (%s): No nasname found for row %s",inst->name,row[0]);
continue;
}
if (!row[2]){
ERROR("rlm_sql (%s): No short name found for row %s",inst->name,row[0]);
continue;
}
if (!row[4]){
ERROR("rlm_sql (%s): No secret found for row %s",inst->name,row[0]);
continue;
}
if ((num_rows > 5) && (row[5] != NULL) && *row[5]) {
server = row[5];
}
DEBUG("rlm_sql (%s): Adding client %s (%s) to %s clients list",
inst->name,
row[1], row[2], server ? server : "global");
/* FIXME: We should really pass a proper ctx */
c = client_afrom_query(NULL,
row[1], /* identifier */
row[4], /* secret */
row[2], /* shortname */
row[3], /* type */
server, /* server */
false); /* require message authenticator */
if (!c) {
continue;
}
if (!client_add(NULL, c)) {
WARN("Failed to add client, possible duplicate?");
client_free(c);
continue;
}
DEBUG("rlm_sql (%s): Client \"%s\" (%s) added", c->longname, c->shortname,
inst->name);
}
(inst->module->sql_finish_select_query)(handle, inst->config);
fr_connection_release(inst->pool, handle);
return 0;
}
/*
* Translate the SQL queries.
*/
static size_t sql_escape_func(UNUSED REQUEST *request, char *out, size_t outlen,
char const *in, void *arg)
{
rlm_sql_handle_t *handle = talloc_get_type_abort(arg, rlm_sql_handle_t);
rlm_sql_t *inst = handle->inst;
size_t len = 0;
while (in[0]) {
size_t utf8_len;
/*
* Allow all multi-byte UTF8 characters.
*/
utf8_len = fr_utf8_char((uint8_t const *) in, -1);
if (utf8_len > 1) {
if (outlen <= utf8_len) break;
memcpy(out, in, utf8_len);
in += utf8_len;
out += utf8_len;
outlen -= utf8_len;
len += utf8_len;
continue;
}
/*
* Because we register our own escape function
* we're now responsible for escaping all special
* chars in an xlat expansion or attribute value.
*/
switch (in[0]) {
case '\n':
if (outlen <= 2) break;
out[0] = '\\';
out[1] = 'n';
in++;
out += 2;
outlen -= 2;
len += 2;
break;
case '\r':
if (outlen <= 2) break;
out[0] = '\\';
out[1] = 'r';
in++;
out += 2;
outlen -= 2;
len += 2;
break;
case '\t':
if (outlen <= 2) break;
out[0] = '\\';
out[1] = 't';
in++;
out += 2;
outlen -= 2;
len += 2;
break;
}
/*
* Non-printable characters get replaced with their
* mime-encoded equivalents.
*/
if ((in[0] < 32) ||
strchr(inst->config->allowed_chars, *in) == NULL) {
/*
* Only 3 or less bytes available.
*/
if (outlen <= 3) {
break;
}
snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
in++;
out += 3;
outlen -= 3;
len += 3;
continue;
}
/*
* Only one byte left.
*/
if (outlen <= 1) {
break;
}
/*
* Allowed character.
*/
*out = *in;
out++;
in++;
outlen--;
len++;
}
*out = '\0';
return len;
}
/** Passed as the escape function to map_proc and sql xlat methods
*
* The variant reserves a connection for the escape functions to use, and releases it after
* escaping is complete.
*/
static size_t sql_escape_for_xlat_func(REQUEST *request, char *out, size_t outlen, char const *in, void *arg)
{
size_t ret;
rlm_sql_t *inst = talloc_get_type_abort(arg, rlm_sql_t);
rlm_sql_handle_t *handle;
handle = fr_connection_get(inst->pool);
if (!handle) {
out[0] = '\0';
return 0;
}
ret = inst->sql_escape_func(request, out, outlen, in, handle);
fr_connection_release(inst->pool, handle);
return ret;
}
/*
* Set the SQL user name.
*
* We don't call the escape function here. The resulting string
* will be escaped later in the queries xlat so we don't need to
* escape it twice. (it will make things wrong if we have an
* escape candidate character in the username)
*/
int sql_set_user(rlm_sql_t *inst, REQUEST *request, char const *username)
{
char *expanded = NULL;
VALUE_PAIR *vp = NULL;
char const *sqluser;
ssize_t len;
rad_assert(request->packet != NULL);
if (username != NULL) {
sqluser = username;
} else if (inst->config->query_user[0] != '\0') {
sqluser = inst->config->query_user;
} else {
return 0;
}
len = radius_axlat(&expanded, request, sqluser, NULL, NULL);
if (len < 0) {
return -1;
}
vp = fr_pair_afrom_da(request->packet, inst->sql_user);
if (!vp) {
talloc_free(expanded);
return -1;
}
fr_pair_value_strsteal(vp, expanded);
RDEBUG2("SQL-User-Name set to '%s'", vp->vp_strvalue);
vp->op = T_OP_SET;
/*
* Delete any existing SQL-User-Name, and replace it with ours.
*/
fr_pair_delete_by_num(&request->packet->vps, vp->da->attr, vp->da->vendor, TAG_ANY);
fr_pair_add(&request->packet->vps, vp);
return 0;
}
/*
* Do a set/unset user, so it's a bit clearer what's going on.
*/
#define sql_unset_user(_i, _r) fr_pair_delete_by_num(&_r->packet->vps, _i->sql_user->attr, _i->sql_user->vendor, TAG_ANY)
static int sql_get_grouplist(rlm_sql_t *inst, rlm_sql_handle_t **handle, REQUEST *request,
rlm_sql_grouplist_t **phead)
{
char *expanded = NULL;
int num_groups = 0;
rlm_sql_row_t row;
rlm_sql_grouplist_t *entry;
int ret;
/* NOTE: sql_set_user should have been run before calling this function */
entry = *phead = NULL;
if (!inst->config->groupmemb_query) return 0;
if (radius_axlat(&expanded, request, inst->config->groupmemb_query, sql_escape_func, *handle) < 0) return -1;
ret = rlm_sql_select_query(inst, request, handle, expanded);
talloc_free(expanded);
if (ret != RLM_SQL_OK) return -1;
while (rlm_sql_fetch_row(inst, request, handle) == RLM_SQL_OK) {
row = (*handle)->row;
if (!row)
break;
if (!row[0]){
RDEBUG("row[0] returned NULL");
(inst->module->sql_finish_select_query)(*handle, inst->config);
talloc_free(entry);
return -1;
}
if (!*phead) {
*phead = talloc_zero(*handle, rlm_sql_grouplist_t);
entry = *phead;
} else {
entry->next = talloc_zero(*phead, rlm_sql_grouplist_t);
entry = entry->next;
}
entry->next = NULL;
entry->name = talloc_typed_strdup(entry, row[0]);
num_groups++;
}
(inst->module->sql_finish_select_query)(*handle, inst->config);
return num_groups;
}
/*
* sql groupcmp function. That way we can do group comparisons (in the users file for example)
* with the group memberships residing in sql
* The group membership query should only return one element which is the username. The returned
* username will then be checked with the passed check string.
*/
static int sql_groupcmp(void *instance, REQUEST *request, UNUSED VALUE_PAIR *request_vp,
VALUE_PAIR *check, UNUSED VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs) CC_HINT(nonnull (1, 2, 4));
static int sql_groupcmp(void *instance, REQUEST *request, UNUSED VALUE_PAIR *request_vp,
VALUE_PAIR *check, UNUSED VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs)
{
rlm_sql_handle_t *handle;
rlm_sql_t *inst = instance;
rlm_sql_grouplist_t *head, *entry;
/*
* No group queries, don't do group comparisons.
*/
if (!inst->config->groupmemb_query) {
RWARN("Cannot do group comparison when group_membership_query is not set");
return 1;
}
RDEBUG("sql_groupcmp");
if (check->vp_length == 0){
RDEBUG("sql_groupcmp: Illegal group name");
return 1;
}
/*
* Set, escape, and check the user attr here
*/
if (sql_set_user(inst, request, NULL) < 0)
return 1;
/*
* Get a socket for this lookup
*/
handle = fr_connection_get(inst->pool);
if (!handle) {
return 1;
}
/*
* Get the list of groups this user is a member of
*/
if (sql_get_grouplist(inst, &handle, request, &head) < 0) {
REDEBUG("Error getting group membership");
fr_connection_release(inst->pool, handle);
return 1;
}
for (entry = head; entry != NULL; entry = entry->next) {
if (strcmp(entry->name, check->vp_strvalue) == 0){
RDEBUG("sql_groupcmp finished: User is a member of group %s",
check->vp_strvalue);
talloc_free(head);
fr_connection_release(inst->pool, handle);
return 0;
}
}
/* Free the grouplist */
talloc_free(head);
fr_connection_release(inst->pool, handle);
RDEBUG("sql_groupcmp finished: User is NOT a member of group %s", check->vp_strvalue);
return 1;
}
static rlm_rcode_t rlm_sql_process_groups(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle,
sql_fall_through_t *do_fall_through)
{
rlm_rcode_t rcode = RLM_MODULE_NOOP;
VALUE_PAIR *check_tmp = NULL, *reply_tmp = NULL, *sql_group = NULL;
rlm_sql_grouplist_t *head = NULL, *entry = NULL;
char *expanded = NULL;
int rows;
rad_assert(request->packet != NULL);
if (!inst->config->groupmemb_query) {
RWARN("Cannot do check groups when group_membership_query is not set");
do_nothing:
*do_fall_through = FALL_THROUGH_DEFAULT;
/*
* Didn't add group attributes or allocate
* memory, so don't do anything else.
*/
return RLM_MODULE_NOTFOUND;
}
/*
* Get the list of groups this user is a member of
*/
rows = sql_get_grouplist(inst, handle, request, &head);
if (rows < 0) {
REDEBUG("Error retrieving group list");
return RLM_MODULE_FAIL;
}
if (rows == 0) {
RDEBUG2("User not found in any groups");
goto do_nothing;
}
rad_assert(head);
RDEBUG2("User found in the group table");
/*
* Add the Sql-Group attribute to the request list so we know
* which group we're retrieving attributes for
*/
sql_group = pair_make_request(inst->group_da->name, NULL, T_OP_EQ);
if (!sql_group) {
REDEBUG("Error creating %s attribute", inst->group_da->name);
rcode = RLM_MODULE_FAIL;
goto finish;
}
entry = head;
do {
next:
rad_assert(entry != NULL);
fr_pair_value_strcpy(sql_group, entry->name);
if (inst->config->authorize_group_check_query) {
vp_cursor_t cursor;
VALUE_PAIR *vp;
/*
* Expand the group query
*/
if (radius_axlat(&expanded, request, inst->config->authorize_group_check_query,
inst->sql_escape_func, *handle) < 0) {
REDEBUG("Error generating query");
rcode = RLM_MODULE_FAIL;
goto finish;
}
rows = sql_getvpdata(request, inst, request, handle, &check_tmp, expanded);
TALLOC_FREE(expanded);
if (rows < 0) {
REDEBUG("Error retrieving check pairs for group %s", entry->name);
rcode = RLM_MODULE_FAIL;
goto finish;
}
/*
* If we got check rows we need to process them before we decide to
* process the reply rows
*/
if ((rows > 0) &&
(paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0)) {
fr_pair_list_free(&check_tmp);
entry = entry->next;
if (!entry) break;
goto next; /* != continue */
}
RDEBUG2("Group \"%s\": Conditional check items matched", entry->name);
rcode = RLM_MODULE_OK;
RDEBUG2("Group \"%s\": Merging assignment check items", entry->name);
RINDENT();
for (vp = fr_cursor_init(&cursor, &check_tmp);
vp;
vp = fr_cursor_next(&cursor)) {
if (!fr_assignment_op[vp->op]) continue;
rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
}
REXDENT();
radius_pairmove(request, &request->config, check_tmp, true);
check_tmp = NULL;
}
if (inst->config->authorize_group_reply_query) {
/*
* Now get the reply pairs since the paircompare matched
*/
if (radius_axlat(&expanded, request, inst->config->authorize_group_reply_query,
inst->sql_escape_func, *handle) < 0) {
REDEBUG("Error generating query");
rcode = RLM_MODULE_FAIL;
goto finish;
}
rows = sql_getvpdata(request->reply, inst, request, handle, &reply_tmp, expanded);
TALLOC_FREE(expanded);
if (rows < 0) {
REDEBUG("Error retrieving reply pairs for group %s", entry->name);
rcode = RLM_MODULE_FAIL;
goto finish;
}
*do_fall_through = fall_through(reply_tmp);
RDEBUG2("Group \"%s\": Merging reply items", entry->name);
rcode = RLM_MODULE_OK;
rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp, NULL);
radius_pairmove(request, &request->reply->vps, reply_tmp, true);
reply_tmp = NULL;
/*
* If there's no reply query configured, then we assume
* FALL_THROUGH_NO, which is the same as the users file if you
* had no reply attributes.
*/
} else {
*do_fall_through = FALL_THROUGH_DEFAULT;
}
entry = entry->next;
} while (entry != NULL && (*do_fall_through == FALL_THROUGH_YES));
finish:
talloc_free(head);
fr_pair_delete_by_num(&request->packet->vps, inst->group_da->attr, 0, TAG_ANY);
return rcode;
}
static int mod_detach(void *instance)
{
rlm_sql_t *inst = instance;
if (inst->pool) fr_connection_pool_free(inst->pool);
/*
* We need to explicitly free all children, so if the driver
* parented any memory off the instance, their destructors
* run before we unload the bytecode for them.
*
* If we don't do this, we get a SEGV deep inside the talloc code
* when it tries to call a destructor that no longer exists.
*/
talloc_free_children(inst);
/*
* Decrements the reference count. The driver object won't be unloaded
* until all instances of rlm_sql that use it have been destroyed.
*/
if (inst->handle) dlclose(inst->handle);
return 0;
}
static int mod_bootstrap(CONF_SECTION *conf, void *instance)
{
rlm_sql_t *inst = instance;
/*
* Hack...
*/
inst->config = &inst->myconfig;
inst->cs = conf;
inst->name = cf_section_name2(conf);
if (!inst->name) inst->name = cf_section_name1(conf);
/*
* Load the appropriate driver for our database.
*/
inst->handle = fr_dlopenext(inst->config->sql_driver_name);
if (!inst->handle) {
ERROR("Could not link driver %s: %s", inst->config->sql_driver_name, fr_strerror());
ERROR("Make sure it (and all its dependent libraries!) are in the search path of your system's ld");
return -1;
}
inst->module = (rlm_sql_module_t *) dlsym(inst->handle, inst->config->sql_driver_name);
if (!inst->module) {
ERROR("Could not link symbol %s: %s", inst->config->sql_driver_name, dlerror());
return -1;
}
INFO("rlm_sql (%s): Driver %s (module %s) loaded and linked", inst->name,
inst->config->sql_driver_name, inst->module->name);
if (inst->config->groupmemb_query) {
if (cf_section_name2(conf)) {
char buffer[256];
snprintf(buffer, sizeof(buffer), "%s-SQL-Group", inst->name);
if (paircompare_register_byname(buffer, dict_attrbyvalue(PW_USER_NAME, 0),
false, sql_groupcmp, inst) < 0) {
ERROR("Error registering group comparison: %s", fr_strerror());
return -1;
}
inst->group_da = dict_attrbyname(buffer);
/*
* We're the default instance
*/
} else {
if (paircompare_register_byname("SQL-Group", dict_attrbyvalue(PW_USER_NAME, 0),
false, sql_groupcmp, inst) < 0) {
ERROR("Error registering group comparison: %s", fr_strerror());
return -1;
}
inst->group_da = dict_attrbyname("SQL-Group");
}
if (!inst->group_da) {
ERROR("Failed resolving group attribute");
return -1;
}
}
/*
* Register the SQL xlat function
*/
xlat_register(inst->name, sql_xlat, sql_escape_for_xlat_func, inst);
return 0;
}
static void *mod_conn_create(TALLOC_CTX *ctx, void *instance)
{
int rcode;
rlm_sql_t *inst = instance;
rlm_sql_handle_t *handle;
/*
* Connections cannot be alloced from the inst or
* pool contexts due to threading issues.
*/
handle = talloc_zero(ctx, rlm_sql_handle_t);
if (!handle) return NULL;
handle->log_ctx = talloc_pool(handle, 2048);
if (!handle->log_ctx) {
talloc_free(handle);
return NULL;
}
/*
* Handle requires a pointer to the SQL inst so the
* destructor has access to the module configuration.
*/
handle->inst = inst;
rcode = (inst->module->sql_socket_init)(handle, inst->config);
if (rcode != 0) {
fail:
exec_trigger(NULL, inst->cs, "modules.sql.fail", true);
/*
* Destroy any half opened connections.
*/
talloc_free(handle);
return NULL;
}
if (inst->config->connect_query) {
if (rlm_sql_select_query(inst, NULL, &handle, inst->config->connect_query) != RLM_SQL_OK) goto fail;
(inst->module->sql_finish_select_query)(handle, inst->config);
}
return handle;
}
static int mod_instantiate(CONF_SECTION *conf, void *instance)
{
rlm_sql_t *inst = instance;
/*
* Complain if the strings exist, but are empty.
*/
#define CHECK_STRING(_x) if (inst->config->_x && !inst->config->_x[0]) \
do { \
WARN("rlm_sql (%s): " STRINGIFY(_x) " is empty. Please delete it from the configuration", inst->name);\
inst->config->_x = NULL;\
} while (0)
CHECK_STRING(groupmemb_query);
CHECK_STRING(authorize_check_query);
CHECK_STRING(authorize_reply_query);
CHECK_STRING(authorize_group_check_query);
CHECK_STRING(authorize_group_reply_query);
CHECK_STRING(simul_count_query);
CHECK_STRING(simul_verify_query);
CHECK_STRING(connect_query);
CHECK_STRING(client_query);
if (strncmp(inst->config->sql_driver_name, "rlm_sql_", 8) != 0) {
ERROR("rlm_sql (%s): \"%s\" is NOT an SQL driver!", inst->name, inst->config->sql_driver_name);
return -1;
}
/*
* We need authorize_group_check_query or authorize_group_reply_query
* if group_membership_query is set.
*
* Or we need group_membership_query if authorize_group_check_query or
* authorize_group_reply_query is set.
*/
if (!inst->config->groupmemb_query) {
if (inst->config->authorize_group_check_query) {
WARN("rlm_sql (%s): Ignoring authorize_group_reply_query as group_membership_query "
"is not configured", inst->name);
}
if (inst->config->authorize_group_reply_query) {
WARN("rlm_sql (%s): Ignoring authorize_group_check_query as group_membership_query "
"is not configured", inst->name);
}
if (!inst->config->read_groups) {
WARN("rlm_sql (%s): Ignoring read_groups as group_membership_query "
"is not configured", inst->name);
inst->config->read_groups = false;
}
} /* allow the group check / reply queries to be NULL */
/*
* This will always exist, as cf_section_parse_init()
* will create it if it doesn't exist. However, the
* "reference" config item won't exist in an auto-created
* configuration. So if that doesn't exist, we ignore
* the whole subsection.
*/
inst->config->accounting.cs = cf_section_sub_find(conf, "accounting");
inst->config->accounting.reference_cp = (cf_pair_find(inst->config->accounting.cs, "reference") != NULL);
inst->config->postauth.cs = cf_section_sub_find(conf, "post-auth");
inst->config->postauth.reference_cp = (cf_pair_find(inst->config->postauth.cs, "reference") != NULL);
/*
* Cache the SQL-User-Name DICT_ATTR, so we can be slightly
* more efficient about creating SQL-User-Name attributes.
*/
inst->sql_user = dict_attrbyname("SQL-User-Name");
if (!inst->sql_user) {
return -1;
}
/*
* Export these methods, too. This avoids RTDL_GLOBAL.
*/
inst->sql_set_user = sql_set_user;
inst->sql_query = rlm_sql_query;
inst->sql_select_query = rlm_sql_select_query;
inst->sql_fetch_row = rlm_sql_fetch_row;
/*
* Either use the module specific escape function
* or our default one.
*/
inst->sql_escape_func = inst->module->sql_escape_func && inst->config->driver_specific_escape ?
inst->module->sql_escape_func :
sql_escape_func;
if (inst->module->mod_instantiate) {
CONF_SECTION *cs;
char const *name;
name = strrchr(inst->config->sql_driver_name, '_');
if (!name) {
name = inst->config->sql_driver_name;
} else {
name++;
}
cs = cf_section_sub_find(conf, name);
if (!cs) {
cs = cf_section_alloc(conf, name, NULL);
if (!cs) {
return -1;
}
}
/*
* It's up to the driver to register a destructor
*/
if (inst->module->mod_instantiate(cs, inst->config) < 0) {
return -1;
}
}
inst->ef = exfile_init(inst, 256, 30, true);
if (!inst->ef) {
cf_log_err_cs(conf, "Failed creating log file context");
return -1;
}
/*
* Initialise the connection pool for this instance
*/
INFO("rlm_sql (%s): Attempting to connect to database \"%s\"", inst->name, inst->config->sql_db);
inst->pool = fr_connection_pool_module_init(inst->cs, inst, mod_conn_create, NULL, NULL);
if (!inst->pool) return -1;
if (inst->config->do_clients) {
if (generate_sql_clients(inst) == -1){
ERROR("Failed to load clients from SQL");
return -1;
}
}
return RLM_MODULE_OK;
}
static rlm_rcode_t mod_authorize(void *instance, REQUEST *request) CC_HINT(nonnull);
static rlm_rcode_t mod_authorize(void *instance, REQUEST *request)
{
rlm_rcode_t rcode = RLM_MODULE_NOOP;
rlm_sql_t *inst = instance;
rlm_sql_handle_t *handle;
VALUE_PAIR *check_tmp = NULL;
VALUE_PAIR *reply_tmp = NULL;
VALUE_PAIR *user_profile = NULL;
bool user_found = false;
sql_fall_through_t do_fall_through = FALL_THROUGH_DEFAULT;
int rows;
char *expanded = NULL;
rad_assert(request->packet != NULL);
rad_assert(request->reply != NULL);
if (!inst->config->authorize_check_query && !inst->config->authorize_reply_query &&
!inst->config->read_groups && !inst->config->read_profiles) {
RWDEBUG("No authorization checks configured, returning noop");
return RLM_MODULE_NOOP;
}
/*
* Set, escape, and check the user attr here
*/
if (sql_set_user(inst, request, NULL) < 0) {
return RLM_MODULE_FAIL;
}
/*
* Reserve a socket
*
* After this point use goto error or goto release to cleanup socket temporary pairlists and
* temporary attributes.
*/
handle = fr_connection_get(inst->pool);
if (!handle) {
rcode = RLM_MODULE_FAIL;
goto error;
}
/*
* Query the check table to find any conditions associated with this user/realm/whatever...
*/
if (inst->config->authorize_check_query) {
vp_cursor_t cursor;
VALUE_PAIR *vp;
if (radius_axlat(&expanded, request, inst->config->authorize_check_query,
inst->sql_escape_func, handle) < 0) {
REDEBUG("Error generating query");
rcode = RLM_MODULE_FAIL;
goto error;
}
rows = sql_getvpdata(request, inst, request, &handle, &check_tmp, expanded);
TALLOC_FREE(expanded);
if (rows < 0) {
REDEBUG("Error getting check attributes");
rcode = RLM_MODULE_FAIL;
goto error;
}
if (rows == 0) {
RWDEBUG2("User not found in radcheck table.");
goto skipreply; /* Don't need to free VPs we don't have */
}
/*
* Only do this if *some* check pairs were returned
*/
RDEBUG2("User found in radcheck table");
user_found = true;
if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0) {
RWDEBUG2("check items do not match.");
fr_pair_list_free(&check_tmp);
check_tmp = NULL;
goto skipreply;
}
RDEBUG2("Conditional check items matched, merging assignment check items");
RINDENT();
for (vp = fr_cursor_init(&cursor, &check_tmp);
vp;
vp = fr_cursor_next(&cursor)) {
if (!fr_assignment_op[vp->op]) continue;
rdebug_pair(2, request, vp, NULL);
}
REXDENT();
radius_pairmove(request, &request->config, check_tmp, true);
rcode = RLM_MODULE_OK;
check_tmp = NULL;
}
if (inst->config->authorize_reply_query) {
/*
* Now get the reply pairs since the paircompare matched
*/
if (radius_axlat(&expanded, request, inst->config->authorize_reply_query,
inst->sql_escape_func, handle) < 0) {
REDEBUG("Error generating query");
rcode = RLM_MODULE_FAIL;
goto error;
}
rows = sql_getvpdata(request->reply, inst, request, &handle, &reply_tmp, expanded);
TALLOC_FREE(expanded);
if (rows < 0) {
REDEBUG("SQL query error getting reply attributes");
rcode = RLM_MODULE_FAIL;
goto error;
}
if (rows == 0) goto skipreply;
do_fall_through = fall_through(reply_tmp);
RDEBUG2("User found in radreply table, merging reply items");
user_found = true;
rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp, NULL);
radius_pairmove(request, &request->reply->vps, reply_tmp, true);
rcode = RLM_MODULE_OK;
reply_tmp = NULL;
}
skipreply:
if ((do_fall_through == FALL_THROUGH_YES) ||
(inst->config->read_groups && (do_fall_through == FALL_THROUGH_DEFAULT))) {
rlm_rcode_t ret;
RDEBUG3("... falling-through to group processing");
ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
switch (ret) {
/*
* Nothing bad happened, continue...
*/
case RLM_MODULE_UPDATED:
rcode = RLM_MODULE_UPDATED;
/* FALL-THROUGH */
case RLM_MODULE_OK:
if (rcode != RLM_MODULE_UPDATED) {
rcode = RLM_MODULE_OK;
}
/* FALL-THROUGH */
case RLM_MODULE_NOOP:
user_found = true;
break;
case RLM_MODULE_NOTFOUND:
break;
default:
rcode = ret;
goto release;
}
}
/*
* Repeat the above process with the default profile or User-Profile
*/
if ((do_fall_through == FALL_THROUGH_YES) ||
(inst->config->read_profiles && (do_fall_through == FALL_THROUGH_DEFAULT))) {
rlm_rcode_t ret;
/*
* Check for a default_profile or for a User-Profile.
*/
RDEBUG3("... falling-through to profile processing");
user_profile = fr_pair_find_by_num(request->config, PW_USER_PROFILE, 0, TAG_ANY);
char const *profile = user_profile ?
user_profile->vp_strvalue :
inst->config->default_profile;
if (!profile || !*profile) {
goto release;
}
RDEBUG2("Checking profile %s", profile);
if (sql_set_user(inst, request, profile) < 0) {
REDEBUG("Error setting profile");
rcode = RLM_MODULE_FAIL;
goto error;
}
ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
switch (ret) {
/*
* Nothing bad happened, continue...
*/
case RLM_MODULE_UPDATED:
rcode = RLM_MODULE_UPDATED;
/* FALL-THROUGH */
case RLM_MODULE_OK:
if (rcode != RLM_MODULE_UPDATED) {
rcode = RLM_MODULE_OK;
}
/* FALL-THROUGH */
case RLM_MODULE_NOOP:
user_found = true;
break;
case RLM_MODULE_NOTFOUND:
break;
default:
rcode = ret;
goto release;
}
}
/*
* At this point the key (user) hasn't been found in the check table, the reply table
* or the group mapping table, and there was no matching profile.
*/
release:
if (!user_found) {
rcode = RLM_MODULE_NOTFOUND;
}
fr_connection_release(inst->pool, handle);
sql_unset_user(inst, request);
return rcode;
error:
fr_pair_list_free(&check_tmp);
fr_pair_list_free(&reply_tmp);
sql_unset_user(inst, request);
fr_connection_release(inst->pool, handle);
return rcode;
}
/*
* Generic function for failing between a bunch of queries.
*
* Uses the same principle as rlm_linelog, expanding the 'reference' config
* item using xlat to figure out what query it should execute.
*
* If the reference matches multiple config items, and a query fails or
* doesn't update any rows, the next matching config item is used.
*
*/
static int acct_redundant(rlm_sql_t *inst, REQUEST *request, sql_acct_section_t *section)
{
rlm_rcode_t rcode = RLM_MODULE_OK;
rlm_sql_handle_t *handle = NULL;
int sql_ret;
int numaffected = 0;
CONF_ITEM *item;
CONF_PAIR *pair;
char const *attr = NULL;
char const *value;
char path[MAX_STRING_LEN];
char *p = path;
char *expanded = NULL;
rad_assert(section);
if (section->reference[0] != '.') {
*p++ = '.';
}
if (radius_xlat(p, sizeof(path) - (p - path), request, section->reference, NULL, NULL) < 0) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
/*
* If we can't find a matching config item we do
* nothing so return RLM_MODULE_NOOP.
*/
item = cf_reference_item(NULL, section->cs, path);
if (!item) {
RWDEBUG("No such configuration item %s", path);
rcode = RLM_MODULE_NOOP;
goto finish;
}
if (cf_item_is_section(item)){
RWDEBUG("Sections are not supported as references");
rcode = RLM_MODULE_NOOP;
goto finish;
}
pair = cf_item_to_pair(item);
attr = cf_pair_attr(pair);
RDEBUG2("Using query template '%s'", attr);
handle = fr_connection_get(inst->pool);
if (!handle) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
sql_set_user(inst, request, NULL);
while (true) {
value = cf_pair_value(pair);
if (!value) {
RDEBUG("Ignoring null query");
rcode = RLM_MODULE_NOOP;
goto finish;
}
if (radius_axlat(&expanded, request, value, inst->sql_escape_func, handle) < 0) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
if (!*expanded) {
RDEBUG("Ignoring null query");
rcode = RLM_MODULE_NOOP;
goto finish;
}
rlm_sql_query_log(inst, request, section, expanded);
sql_ret = rlm_sql_query(inst, request, &handle, expanded);
TALLOC_FREE(expanded);
RDEBUG("SQL query returned: %s", fr_int2str(sql_rcode_table, sql_ret, "<INVALID>"));
switch (sql_ret) {
/*
* Query was a success! Now we just need to check if it did anything.
*/
case RLM_SQL_OK:
break;
/*
* A general, unrecoverable server fault.
*/
case RLM_SQL_ERROR:
/*
* If we get RLM_SQL_RECONNECT it means all connections in the pool
* were exhausted and we couldn't create a new connection,
* so we do not need to call fr_connection_release.
*/
case RLM_SQL_RECONNECT:
rcode = RLM_MODULE_FAIL;
goto finish;
/*
* Query was invalid, this is a terminal error, but we still need
* to do cleanup, as the connection handle is still valid.
*/
case RLM_SQL_QUERY_INVALID:
rcode = RLM_MODULE_INVALID;
goto finish;
/*
* Driver found an error (like a unique key constraint violation)
* that hinted it might be a good idea to try an alternative query.
*/
case RLM_SQL_ALT_QUERY:
goto next;
}
rad_assert(handle);
/*
* We need to have updated something for the query to have been
* counted as successful.
*/
numaffected = (inst->module->sql_affected_rows)(handle, inst->config);
(inst->module->sql_finish_query)(handle, inst->config);
RDEBUG("%i record(s) updated", numaffected);
if (numaffected > 0) break; /* A query succeeded, we're done! */
next:
/*
* We assume all entries with the same name form a redundant
* set of queries.
*/
pair = cf_pair_find_next(section->cs, pair, attr);
if (!pair) {
char const *name;
/*
* Hack for RADIUS!
*/
name = cf_section_name1(section->cs);
if ((strcmp(name, "accounting-on") == 0) ||
(strcmp(name, "accounting-off") == 0)) {
RDEBUG("Accounting on/off had no updates. Returning 'ok'");
rcode = RLM_MODULE_OK;
goto finish;
}
RDEBUG("No additional queries configured");
rcode = RLM_MODULE_NOOP;
goto finish;
}
RDEBUG("Trying next query...");
}
finish:
talloc_free(expanded);
fr_connection_release(inst->pool, handle);
sql_unset_user(inst, request);
return rcode;
}
#ifdef WITH_ACCOUNTING
/*
* Accounting: Insert or update session data in our sql table
*/
static rlm_rcode_t mod_accounting(void *instance, REQUEST *request) CC_HINT(nonnull);
static rlm_rcode_t mod_accounting(void *instance, REQUEST *request)
{
rlm_sql_t *inst = instance;
if (inst->config->accounting.reference_cp) {
return acct_redundant(inst, request, &inst->config->accounting);
}
return RLM_MODULE_NOOP;
}
#endif
#ifdef WITH_SESSION_MGMT
/*
* See if a user is already logged in. Sets request->simul_count to the
* current session count for this user.
*
* Check twice. If on the first pass the user exceeds his
* max. number of logins, do a second pass and validate all
* logins by querying the terminal server (using eg. SNMP).
*/
static rlm_rcode_t mod_checksimul(void *instance, REQUEST *request) CC_HINT(nonnull);
static rlm_rcode_t mod_checksimul(void *instance, REQUEST * request)
{
rlm_rcode_t rcode = RLM_MODULE_OK;
rlm_sql_handle_t *handle = NULL;
rlm_sql_t *inst = instance;
rlm_sql_row_t row;
int check = 0;
uint32_t ipno = 0;
char const *call_num = NULL;
VALUE_PAIR *vp;
int ret;
fr_ipaddr_t nas_addr;
uint32_t nas_port = 0;
char *expanded = NULL;
/* If simul_count_query is not defined, we don't do any checking */
if (!inst->config->simul_count_query) {
RWDEBUG("Simultaneous-Use checking requires 'simul_count_query' to be configured");
return RLM_MODULE_NOOP;
}
if ((!request->username) || (request->username->vp_length == 0)) {
REDEBUG("Zero Length username not permitted");
return RLM_MODULE_INVALID;
}
if (sql_set_user(inst, request, NULL) < 0) {
return RLM_MODULE_FAIL;
}
/* initialize the sql socket */
handle = fr_connection_get(inst->pool);
if (!handle) {
talloc_free(expanded);
sql_unset_user(inst, request);
return RLM_MODULE_FAIL;
}
if (radius_axlat(&expanded, request, inst->config->simul_count_query, inst->sql_escape_func, handle) < 0) {
sql_unset_user(inst, request);
return RLM_MODULE_FAIL;
}
if (rlm_sql_select_query(inst, request, &handle, expanded) != RLM_SQL_OK) {
rcode = RLM_MODULE_FAIL;
goto release; /* handle may no longer be valid */
}
ret = rlm_sql_fetch_row(inst, request, &handle);
if (ret != 0) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
row = handle->row;
if (!row) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
request->simul_count = atoi(row[0]);
(inst->module->sql_finish_select_query)(handle, inst->config);
TALLOC_FREE(expanded);
if (request->simul_count < request->simul_max) {
rcode = RLM_MODULE_OK;
goto finish;
}
/*
* Looks like too many sessions, so let's start verifying
* them, unless told to rely on count query only.
*/
if (!inst->config->simul_verify_query) {
rcode = RLM_MODULE_OK;
goto finish;
}
if (radius_axlat(&expanded, request, inst->config->simul_verify_query, inst->sql_escape_func, handle) < 0) {
rcode = RLM_MODULE_FAIL;
goto finish;
}
if (rlm_sql_select_query(inst, request, &handle, expanded) != RLM_SQL_OK) goto release;
/*
* Setup some stuff, like for MPP detection.
*/
request->simul_count = 0;
if ((vp = fr_pair_find_by_num(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0, TAG_ANY)) != NULL) {
ipno = vp->vp_ipaddr;
}
if ((vp = fr_pair_find_by_num(request->packet->vps, PW_CALLING_STATION_ID, 0, TAG_ANY)) != NULL) {
call_num = vp->vp_strvalue;
}
while (rlm_sql_fetch_row(inst, request, &handle) == RLM_SQL_OK) {
int num_rows;
row = handle->row;
if (!row) {
break;
}
num_rows = (inst->module->sql_num_fields)(handle, inst->config);
if (num_rows < 8) {
RDEBUG("Too few rows returned. Please do not edit 'simul_verify_query'");
rcode = RLM_MODULE_FAIL;
goto finish;
}
if (!row[2]){
RDEBUG("Cannot zap stale entry. No username present in entry");
rcode = RLM_MODULE_FAIL;
goto finish;
}
if (!row[1]){
RDEBUG("Cannot zap stale entry. No session id in entry");
rcode = RLM_MODULE_FAIL;
goto finish;
}
if (row[3]) {
if (fr_pton(&nas_addr, row[3], -1, AF_UNSPEC, false) < 0) {
RDEBUG("Cannot parse '%s' as an IPv4 or an IPv6 address - %s", row[3], fr_strerror());
rcode = RLM_MODULE_FAIL;
goto finish;
}
}
if (row[4]) {
nas_port = atoi(row[4]);
}
check = rad_check_ts(&nas_addr, nas_port, row[2], row[1]);
if (check == 0) {
/*
* Stale record - zap it.
*/
if (inst->config->delete_stale_sessions == true) {
uint32_t framed_addr = 0;
char proto = 0;
int sess_time = 0;
if (row[5])
framed_addr = inet_addr(row[5]);
if (row[7]){
if (strcmp(row[7], "PPP") == 0)
proto = 'P';
else if (strcmp(row[7], "SLIP") == 0)
proto = 'S';
}
if ((num_rows > 8) && row[8])
sess_time = atoi(row[8]);
session_zap(request, &nas_addr, nas_port,
row[2], row[1], framed_addr,
proto, sess_time);
}
}
else if (check == 1) {
/*
* User is still logged in.
*/
++request->simul_count;
/*
* Does it look like a MPP attempt?
*/
if (row[5] && ipno && inet_addr(row[5]) == ipno) {
request->simul_mpp = 2;
} else if (row[6] && call_num && !strncmp(row[6],call_num,16)) {
request->simul_mpp = 2;
}
} else {
/*
* Failed to check the terminal server for
* duplicate logins: return an error.
*/
REDEBUG("Failed to check the terminal server for user '%s'.", row[2]);
rcode = RLM_MODULE_FAIL;
goto finish;
}
}
finish:
(inst->module->sql_finish_select_query)(handle, inst->config);
release:
fr_connection_release(inst->pool, handle);
talloc_free(expanded);
sql_unset_user(inst, request);
/*
* The Auth module apparently looks at request->simul_count,
* not the return value of this module when deciding to deny
* a call for too many sessions.
*/
return rcode;
}
#endif
/*
* Postauth: Write a record of the authentication attempt
*/
static rlm_rcode_t mod_post_auth(void *instance, REQUEST *request) CC_HINT(nonnull);
static rlm_rcode_t mod_post_auth(void *instance, REQUEST *request)
{
rlm_sql_t *inst = instance;
if (inst->config->postauth.reference_cp) {
return acct_redundant(inst, request, &inst->config->postauth);
}
return RLM_MODULE_NOOP;
}
/*
* Execute postauth_query after authentication
*/
/* globally exported name */
extern module_t rlm_sql;
module_t rlm_sql = {
.magic = RLM_MODULE_INIT,
.name = "sql",
.type = RLM_TYPE_THREAD_SAFE,
.inst_size = sizeof(rlm_sql_t),
.config = module_config,
.bootstrap = mod_bootstrap,
.instantiate = mod_instantiate,
.detach = mod_detach,
.methods = {
[MOD_AUTHORIZE] = mod_authorize,
#ifdef WITH_ACCOUNTING
[MOD_ACCOUNTING] = mod_accounting,
#endif
#ifdef WITH_SESSION_MGMT
[MOD_SESSION] = mod_checksimul,
#endif
[MOD_POST_AUTH] = mod_post_auth
},
};
|