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update res_odbc to support pooled connections

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(from tilghman's developer branch, res_odbc_rewrite)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@21181 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2006-04-18 18:16:32 +00:00
parent fc2d28805b
commit 501ac5189c
4 changed files with 587 additions and 419 deletions
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746
res/res_odbc.c
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@@ -49,66 +49,30 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/cli.h"
#include "asterisk/lock.h"
#include "asterisk/res_odbc.h"
#define MAX_ODBC_HANDLES 25
struct odbc_list
struct odbc_class
{
AST_LIST_ENTRY(odbc_class) list;
char name[80];
odbc_obj *obj;
int used;
char dsn[80];
char username[80];
char password[80];
SQLHENV env;
unsigned int haspool:1; /* Boolean - TDS databases need this */
unsigned int limit:10; /* Gives a limit of 1023 maximum */
unsigned int count:10; /* Running count of pooled connections */
unsigned int delme:1; /* Purge the class */
AST_LIST_HEAD(, odbc_obj) odbc_obj;
};
static struct odbc_list ODBC_REGISTRY[MAX_ODBC_HANDLES];
AST_LIST_HEAD_STATIC(odbc_list, odbc_class);
static odbc_status odbc_obj_connect(struct odbc_obj *obj);
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
static int odbc_register_class(struct odbc_class *class, int connect);
static void odbc_destroy(void)
{
int x = 0;
for (x = 0; x < MAX_ODBC_HANDLES; x++) {
if (ODBC_REGISTRY[x].obj) {
destroy_odbc_obj(&ODBC_REGISTRY[x].obj);
ODBC_REGISTRY[x].obj = NULL;
}
}
}
static odbc_obj *odbc_read(struct odbc_list *registry, const char *name)
{
int x = 0;
for (x = 0; x < MAX_ODBC_HANDLES; x++) {
if (registry[x].used && !strcmp(registry[x].name, name)) {
return registry[x].obj;
}
}
return NULL;
}
static int odbc_write(struct odbc_list *registry, char *name, odbc_obj *obj)
{
int x = 0;
for (x = 0; x < MAX_ODBC_HANDLES; x++) {
if (!registry[x].used) {
ast_copy_string(registry[x].name, name, sizeof(registry[x].name));
registry[x].obj = obj;
registry[x].used = 1;
return 1;
}
}
return 0;
}
static void odbc_init(void)
{
int x = 0;
for (x = 0; x < MAX_ODBC_HANDLES; x++) {
memset(&ODBC_REGISTRY[x], 0, sizeof(struct odbc_list));
}
}
/* internal stuff */
SQLHSTMT odbc_prepare_and_execute(odbc_obj *obj, SQLHSTMT (*prepare_cb)(odbc_obj *obj, void *data), void *data)
SQLHSTMT odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
{
int res = 0, i, attempt;
SQLINTEGER nativeerror=0, numfields=0;
@@ -142,9 +106,12 @@ SQLHSTMT odbc_prepare_and_execute(odbc_obj *obj, SQLHSTMT (*prepare_cb)(odbc_obj
ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_mutex_lock(&obj->lock);
obj->up = 0;
ast_mutex_unlock(&obj->lock);
/*
* While this isn't the best way to try to correct an error, this won't automatically
* fail when the statement handle invalidates.
*/
/* XXX Actually, it might, if we're using a non-pooled connection. Possible race here. XXX */
odbc_obj_disconnect(obj);
odbc_obj_connect(obj);
continue;
@@ -156,7 +123,7 @@ SQLHSTMT odbc_prepare_and_execute(odbc_obj *obj, SQLHSTMT (*prepare_cb)(odbc_obj
return stmt;
}
int odbc_smart_execute(odbc_obj *obj, SQLHSTMT stmt)
int odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
{
int res = 0, i;
SQLINTEGER nativeerror=0, numfields=0;
@@ -176,7 +143,14 @@ int odbc_smart_execute(odbc_obj *obj, SQLHSTMT stmt)
}
}
}
/*
#if 0
/* This is a really bad method of trying to correct a dead connection. It
* only ever really worked with MySQL. It will not work with any other
* database, since most databases prepare their statements on the server,
* and if you disconnect, you invalidate the statement handle. Hence, if
* you disconnect, you're going to fail anyway, whether you try to execute
* a second time or not.
*/
ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
ast_mutex_lock(&obj->lock);
obj->up = 0;
@@ -184,58 +158,38 @@ int odbc_smart_execute(odbc_obj *obj, SQLHSTMT stmt)
odbc_obj_disconnect(obj);
odbc_obj_connect(obj);
res = SQLExecute(stmt);
*/
#endif
}
return res;
}
int odbc_smart_direct_execute(odbc_obj *obj, SQLHSTMT stmt, char *sql)
{
int res = 0;
res = SQLExecDirect (stmt, (unsigned char *)sql, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "SQL Execute error! Attempting a reconnect...\n");
ast_mutex_lock(&obj->lock);
obj->up = 0;
ast_mutex_unlock(&obj->lock);
odbc_obj_disconnect(obj);
odbc_obj_connect(obj);
res = SQLExecDirect (stmt, (unsigned char *)sql, SQL_NTS);
}
return res;
}
int odbc_sanity_check(odbc_obj *obj)
int odbc_sanity_check(struct odbc_obj *obj)
{
char *test_sql = "select 1";
SQLHSTMT stmt;
int res = 0;
ast_mutex_lock(&obj->lock);
if(obj->up) { /* so you say... let's make sure */
res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
if (obj->up) {
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0; /* Liar!*/
obj->up = 0;
} else {
res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0; /* Liar!*/
obj->up = 0;
} else {
res = SQLExecute(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0; /* Liar!*/
obj->up = 0;
}
}
}
SQLFreeHandle (SQL_HANDLE_STMT, stmt);
}
ast_mutex_unlock(&obj->lock);
if(!obj->up) { /* Try to reconnect! */
if (!obj->up) { /* Try to reconnect! */
ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
odbc_obj_disconnect(obj);
odbc_obj_connect(obj);
@@ -249,325 +203,305 @@ static int load_odbc_config(void)
struct ast_config *config;
struct ast_variable *v;
char *cat, *dsn, *username, *password;
int enabled;
int connect = 0;
char *env_var;
int enabled, pooling, limit;
int connect = 0, res = 0;
odbc_obj *obj;
struct odbc_class *new;
config = ast_config_load(cfg);
if (config) {
for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
if (!strcmp(cat, "ENV")) {
if (!strcasecmp(cat, "ENV")) {
for (v = ast_variable_browse(config, cat); v; v = v->next) {
env_var = malloc(strlen(v->name) + strlen(v->value) + 2);
if (env_var) {
sprintf(env_var, "%s=%s", v->name, v->value);
ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
putenv(env_var);
free(env_var);
setenv(v->name, v->value, 1);
ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
}
} else {
/* Reset all to defaults for each class of odbc connections */
dsn = username = password = NULL;
enabled = 1;
connect = 0;
pooling = 0;
limit = 0;
for (v = ast_variable_browse(config, cat); v; v = v->next) {
if (!strcasecmp(v->name, "pooling")) {
pooling = 1;
} else if (!strcasecmp(v->name, "limit")) {
sscanf(v->value, "%d", &limit);
if (ast_true(v->value) && !limit) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
limit = 1023;
} else if (ast_false(v->value)) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Disabling ODBC class '%s'.\n", v->value, cat);
enabled = 0;
break;
}
} else if (!strcasecmp(v->name, "enabled")) {
enabled = ast_true(v->value);
} else if (!strcasecmp(v->name, "pre-connect")) {
connect = ast_true(v->value);
} else if (!strcasecmp(v->name, "dsn")) {
dsn = v->value;
} else if (!strcasecmp(v->name, "username")) {
username = v->value;
} else if (!strcasecmp(v->name, "password")) {
password = v->value;
}
}
cat = ast_category_browse(config, cat);
}
if (enabled && !ast_strlen_zero(dsn)) {
new = ast_calloc(1, sizeof(*new));
dsn = username = password = NULL;
enabled = 1;
connect = 0;
for (v = ast_variable_browse(config, cat); v; v = v->next) {
if (!strcmp(v->name, "enabled"))
enabled = ast_true(v->value);
if (!strcmp(v->name, "pre-connect"))
connect = ast_true(v->value);
if (!strcmp(v->name, "dsn"))
dsn = v->value;
if (!strcmp(v->name, "username"))
username = v->value;
if (!strcmp(v->name, "password"))
password = v->value;
}
if (enabled && dsn) {
obj = new_odbc_obj(cat, dsn, username, password);
if (obj) {
register_odbc_obj(cat, obj);
ast_log(LOG_NOTICE, "registered database handle '%s' dsn->[%s]\n", cat, obj->dsn);
if (connect) {
odbc_obj_connect(obj);
if (!new) {
ast_log(LOG_ERROR, "Memory error while loading configuration.\n");
res = -1;
break;
}
} else {
ast_log(LOG_WARNING, "Addition of obj %s failed.\n", cat);
}
if (cat)
ast_copy_string(new->name, cat, sizeof(new->name));
if (dsn)
ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
if (username)
ast_copy_string(new->username, username, sizeof(new->username));
if (password)
ast_copy_string(new->password, password, sizeof(new->password));
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
SQLFreeHandle(SQL_HANDLE_ENV, new->env);
return res;
}
if (pooling) {
new->haspool = pooling;
if (limit) {
new->limit = limit;
} else {
ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless. Changing limit from 0 to 5.\n");
new->limit = 5;
}
}
odbc_register_class(new, connect);
ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
}
}
}
ast_config_destroy(config);
}
return 0;
}
int odbc_dump_fd(int fd, odbc_obj *obj)
{
/* make sure the connection is up before we lie to our master.*/
odbc_sanity_check(obj);
ast_cli(fd, "Name: %s\nDSN: %s\nConnected: %s\n\n", obj->name, obj->dsn, obj->up ? "yes" : "no");
return 0;
}
static int odbc_connect_usage(int fd)
{
ast_cli(fd, "usage odbc connect <DSN>\n");
return 0;
}
static int odbc_disconnect_usage(int fd)
{
ast_cli(fd, "usage odbc disconnect <DSN>\n");
return 0;
return res;
}
static int odbc_show_command(int fd, int argc, char **argv)
{
odbc_obj *obj;
int x = 0;
struct odbc_class *class;
struct odbc_obj *current;
if (!strcmp(argv[1], "show")) {
if (!argv[2] || (argv[2] && !strcmp(argv[2], "all"))) {
for (x = 0; x < MAX_ODBC_HANDLES; x++) {
if (!ODBC_REGISTRY[x].used)
break;
if (ODBC_REGISTRY[x].obj)
odbc_dump_fd(fd, ODBC_REGISTRY[x].obj);
AST_LIST_LOCK(&odbc_list);
AST_LIST_TRAVERSE(&odbc_list, class, list) {
if ((argc == 2) || (argc == 3 && !strcmp(argv[2], "all")) || (!strcmp(argv[2], class->name))) {
int count = 0;
ast_cli(fd, "Name: %s\nDSN: %s\n", class->name, class->dsn);
if (class->haspool) {
ast_cli(fd, "Pooled: yes\nLimit: %d\nConnections in use: %d\n", class->limit, class->count);
AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
ast_cli(fd, " Connection %d: %s", ++count, current->up && odbc_sanity_check(current) ? "connected" : "disconnected");
}
} else {
/* Should only ever be one of these */
AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
ast_cli(fd, "Pooled: no\nConnected: %s\n", current->up && odbc_sanity_check(current) ? "yes" : "no");
}
}
ast_cli(fd, "\n");
}
} else {
obj = odbc_read(ODBC_REGISTRY, argv[2]);
if (obj)
odbc_dump_fd(fd, obj);
}
AST_LIST_UNLOCK(&odbc_list);
}
return 0;
}
static int odbc_disconnect_command(int fd, int argc, char **argv)
{
odbc_obj *obj;
if (!strcmp(argv[1], "disconnect")) {
if (!argv[2])
return odbc_disconnect_usage(fd);
obj = odbc_read(ODBC_REGISTRY, argv[2]);
if (obj) {
odbc_obj_disconnect(obj);
}
}
return 0;
}
static int odbc_connect_command(int fd, int argc, char **argv)
{
odbc_obj *obj;
if (!argv[1])
return odbc_connect_usage(fd);
if (!strcmp(argv[1], "connect") || !strcmp(argv[1], "disconnect")) {
if (!argv[2])
return odbc_connect_usage(fd);
obj = odbc_read(ODBC_REGISTRY, argv[2]);
if (obj) {
odbc_obj_connect(obj);
}
}
return 0;
}
static char connect_usage[] =
"Usage: odbc connect <DSN>\n"
" Connect to ODBC DSN\n";
static char disconnect_usage[] =
"Usage: odbc connect <DSN>\n"
" Disconnect from ODBC DSN\n";
static char show_usage[] =
"Usage: odbc show {DSN}\n"
" Show ODBC {DSN}\n"
" Specifying DSN will show that DSN else, all DSNs are shown\n";
static struct ast_cli_entry odbc_connect_struct =
{ { "odbc", "connect", NULL }, odbc_connect_command, "Connect to ODBC DSN", connect_usage };
static struct ast_cli_entry odbc_disconnect_struct =
{ { "odbc", "disconnect", NULL }, odbc_disconnect_command, "Disconnect from ODBC DSN", disconnect_usage };
"Usage: odbc show [<class>]\n"
" List settings of a particular ODBC class.\n"
" or, if not specified, all classes.\n";
static struct ast_cli_entry odbc_show_struct =
{ { "odbc", "show", NULL }, odbc_show_command, "Show ODBC DSN(s)", show_usage };
/* api calls */
int register_odbc_obj(char *name, odbc_obj *obj)
static int odbc_register_class(struct odbc_class *class, int connect)
{
if (obj != NULL)
return odbc_write(ODBC_REGISTRY, name, obj);
return 0;
struct odbc_obj *obj;
if (class) {
AST_LIST_LOCK(&odbc_list);
AST_LIST_INSERT_HEAD(&odbc_list, class, list);
AST_LIST_UNLOCK(&odbc_list);
if (connect) {
/* Request and release builds a connection */
obj = odbc_request_obj(class->name, 0);
odbc_release_obj(obj);
}
return 0;
} else {
ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
return -1;
}
}
odbc_obj *fetch_odbc_obj(const char *name, int check)
void odbc_release_obj(struct odbc_obj *obj)
{
odbc_obj *obj = NULL;
if((obj = (odbc_obj *) odbc_read(ODBC_REGISTRY, name))) {
if(check)
odbc_sanity_check(obj);
/* For pooled connections, this frees the connection to be
* reused. For non-pooled connections, it does nothing. */
obj->used = 0;
}
struct odbc_obj *odbc_request_obj(const char *name, int check)
{
struct odbc_obj *obj = NULL;
struct odbc_class *class;
AST_LIST_LOCK(&odbc_list);
AST_LIST_TRAVERSE(&odbc_list, class, list) {
if (!strcmp(class->name, name))
break;
}
AST_LIST_UNLOCK(&odbc_list);
if (!class)
return NULL;
AST_LIST_LOCK(&class->odbc_obj);
if (class->haspool) {
/* Recycle connections before building another */
AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
if (! obj->used) {
obj->used = 1;
break;
}
}
if (!obj && (class->count < class->limit)) {
class->count++;
obj = ast_calloc(1, sizeof(*obj));
if (!obj) {
ast_log(LOG_ERROR, "Out of memory\n");
AST_LIST_UNLOCK(&class->odbc_obj);
return NULL;
}
ast_mutex_init(&obj->lock);
obj->parent = class;
odbc_obj_connect(obj);
AST_LIST_INSERT_TAIL(&class->odbc_obj, obj, list);
}
} else {
/* Non-pooled connection: multiple modules can use the same connection. */
AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
/* Non-pooled connection: if there is an entry, return it */
break;
}
if (!obj) {
/* No entry: build one */
obj = ast_calloc(1, sizeof(*obj));
if (!obj) {
ast_log(LOG_ERROR, "Out of memory\n");
AST_LIST_UNLOCK(&class->odbc_obj);
return NULL;
}
ast_mutex_init(&obj->lock);
obj->parent = class;
if (odbc_obj_connect(obj) == ODBC_FAIL) {
ast_log(LOG_WARNING, "Failed to connect\n");
ast_mutex_destroy(&obj->lock);
free(obj);
} else {
AST_LIST_INSERT_HEAD(&class->odbc_obj, obj, list);
}
}
}
AST_LIST_UNLOCK(&class->odbc_obj);
if (obj && check) {
odbc_sanity_check(obj);
}
return obj;
}
odbc_obj *new_odbc_obj(char *name, char *dsn, char *username, char *password)
{
static odbc_obj *new;
if (!(new = calloc(1, sizeof(*new))) ||
!(new->name = malloc(strlen(name) + 1)) ||
!(new->dsn = malloc(strlen(dsn) + 1)))
goto cleanup;
if (username) {
if (!(new->username = malloc(strlen(username) + 1)))
goto cleanup;
strcpy(new->username, username);
}
if (password) {
if (!(new->password = malloc(strlen(password) + 1)))
goto cleanup;
strcpy(new->password, password);
}
strcpy(new->name, name);
strcpy(new->dsn, dsn);
new->env = SQL_NULL_HANDLE;
new->up = 0;
ast_mutex_init(&new->lock);
return new;
cleanup:
if (new) {
free(new->name);
free(new->dsn);
free(new->username);
free(new->password);
free(new);
}
return NULL;
}
void destroy_odbc_obj(odbc_obj **obj)
{
odbc_obj_disconnect(*obj);
ast_mutex_lock(&(*obj)->lock);
SQLFreeHandle(SQL_HANDLE_STMT, (*obj)->stmt);
SQLFreeHandle(SQL_HANDLE_DBC, (*obj)->con);
SQLFreeHandle(SQL_HANDLE_ENV, (*obj)->env);
free((*obj)->name);
free((*obj)->dsn);
if ((*obj)->username)
free((*obj)->username);
if ((*obj)->password)
free((*obj)->password);
ast_mutex_unlock(&(*obj)->lock);
ast_mutex_destroy(&(*obj)->lock);
free(*obj);
}
odbc_status odbc_obj_disconnect(odbc_obj *obj)
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
{
int res;
ast_mutex_lock(&obj->lock);
res = SQLDisconnect(obj->con);
if (res == ODBC_SUCCESS) {
ast_log(LOG_WARNING, "res_odbc: disconnected %d from %s [%s]\n", res, obj->name, obj->dsn);
ast_log(LOG_WARNING, "res_odbc: disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
} else {
ast_log(LOG_WARNING, "res_odbc: %s [%s] already disconnected\n",
obj->name, obj->dsn);
obj->parent->name, obj->parent->dsn);
}
obj->up = 0;
ast_mutex_unlock(&obj->lock);
return ODBC_SUCCESS;
}
odbc_status odbc_obj_connect(odbc_obj *obj)
static odbc_status odbc_obj_connect(struct odbc_obj *obj)
{
int res;
SQLINTEGER err;
short int mlen;
unsigned char msg[200], stat[10];
#ifdef NEEDTRACE
SQLINTEGER enable = 1;
char *tracefile = "/tmp/odbc.trace";
#endif
ast_mutex_lock(&obj->lock);
if (obj->env == SQL_NULL_HANDLE) {
res = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &obj->env);
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (option_verbose > 3)
ast_log(LOG_WARNING, "res_odbc: Error AllocHandle\n");
ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
res = SQLSetEnvAttr(obj->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
SQLFreeHandle(SQL_HANDLE_ENV, obj->parent->env);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (option_verbose > 3)
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->env, &obj->con);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (option_verbose > 3)
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
if(obj->up) {
SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
#ifdef NEEDTRACE
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
#endif
if (obj->up) {
odbc_obj_disconnect(obj);
ast_log(LOG_NOTICE,"Re-connecting %s\n", obj->name);
ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
} else {
ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
}
ast_log(LOG_NOTICE, "Connecting %s\n", obj->name);
res = SQLConnect(obj->con,
(SQLCHAR *) obj->dsn, SQL_NTS,
(SQLCHAR *) obj->username, SQL_NTS,
(SQLCHAR *) obj->password, SQL_NTS);
(SQLCHAR *) obj->parent->dsn, SQL_NTS,
(SQLCHAR *) obj->parent->username, SQL_NTS,
(SQLCHAR *) obj->parent->password, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, stat, &err, msg, 100, &mlen);
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
ast_mutex_unlock(&obj->lock);
ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
return ODBC_FAIL;
} else {
ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->name, obj->dsn);
ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->parent->name, obj->parent->dsn);
obj->up = 1;
}
@@ -577,23 +511,159 @@ odbc_status odbc_obj_connect(odbc_obj *obj)
LOCAL_USER_DECL;
static int reload(void *mod)
{
static char *cfg = "res_odbc.conf";
struct ast_config *config;
struct ast_variable *v;
char *cat, *dsn, *username, *password;
int enabled, pooling, limit;
int connect = 0, res = 0;
struct odbc_class *new, *class;
struct odbc_obj *current;
/* First, mark all to be purged */
AST_LIST_LOCK(&odbc_list);
AST_LIST_TRAVERSE(&odbc_list, class, list) {
class->delme = 1;
}
config = ast_config_load(cfg);
if (config) {
for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
if (!strcasecmp(cat, "ENV")) {
for (v = ast_variable_browse(config, cat); v; v = v->next) {
setenv(v->name, v->value, 1);
ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
}
} else {
/* Reset all to defaults for each class of odbc connections */
dsn = username = password = NULL;
enabled = 1;
connect = 0;
pooling = 0;
limit = 0;
for (v = ast_variable_browse(config, cat); v; v = v->next) {
if (!strcasecmp(v->name, "pooling")) {
pooling = 1;
} else if (!strcasecmp(v->name, "limit")) {
sscanf(v->value, "%d", &limit);
if (ast_true(v->value) && !limit) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
limit = 1023;
} else if (ast_false(v->value)) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Disabling ODBC class '%s'.\n", v->value, cat);
enabled = 0;
break;
}
} else if (!strcasecmp(v->name, "enabled")) {
enabled = ast_true(v->value);
} else if (!strcasecmp(v->name, "pre-connect")) {
connect = ast_true(v->value);
} else if (!strcasecmp(v->name, "dsn")) {
dsn = v->value;
} else if (!strcasecmp(v->name, "username")) {
username = v->value;
} else if (!strcasecmp(v->name, "password")) {
password = v->value;
}
}
if (enabled && !ast_strlen_zero(dsn)) {
/* First, check the list to see if it already exists */
AST_LIST_TRAVERSE(&odbc_list, class, list) {
if (!strcmp(class->name, cat)) {
class->delme = 0;
break;
}
}
if (class) {
new = class;
} else {
new = ast_calloc(1, sizeof(*new));
}
if (!new) {
ast_log(LOG_ERROR, "Memory error while loading configuration.\n");
res = -1;
break;
}
if (cat)
ast_copy_string(new->name, cat, sizeof(new->name));
if (dsn)
ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
if (username)
ast_copy_string(new->username, username, sizeof(new->username));
if (password)
ast_copy_string(new->password, password, sizeof(new->password));
if (!class) {
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
SQLFreeHandle(SQL_HANDLE_ENV, new->env);
AST_LIST_UNLOCK(&odbc_list);
return res;
}
}
if (pooling) {
new->haspool = pooling;
if (limit) {
new->limit = limit;
} else {
ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless. Changing limit from 0 to 5.\n");
new->limit = 5;
}
}
if (class) {
ast_log(LOG_NOTICE, "Refreshing ODBC class '%s' dsn->[%s]\n", cat, dsn);
} else {
odbc_register_class(new, connect);
ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
}
}
}
}
ast_config_destroy(config);
}
/* Purge classes that we know can go away (pooled with 0, only) */
AST_LIST_TRAVERSE_SAFE_BEGIN(&odbc_list, class, list) {
if (class->delme && class->haspool && class->count == 0) {
AST_LIST_TRAVERSE_SAFE_BEGIN(&(class->odbc_obj), current, list) {
AST_LIST_REMOVE_CURRENT(&(class->odbc_obj), list);
odbc_obj_disconnect(current);
ast_mutex_destroy(&current->lock);
free(current);
}
AST_LIST_TRAVERSE_SAFE_END;
AST_LIST_REMOVE_CURRENT(&odbc_list, list);
free(class);
}
}
AST_LIST_TRAVERSE_SAFE_END;
AST_LIST_UNLOCK(&odbc_list);
return 0;
}
static int unload_module(void *mod)
{
STANDARD_HANGUP_LOCALUSERS;
odbc_destroy();
ast_cli_unregister(&odbc_disconnect_struct);
ast_cli_unregister(&odbc_connect_struct);
ast_cli_unregister(&odbc_show_struct);
ast_log(LOG_NOTICE, "res_odbc unloaded.\n");
return 0;
/* Prohibit unloading */
return -1;
}
static int load_module(void *mod)
{
odbc_init();
load_odbc_config();
ast_cli_register(&odbc_disconnect_struct);
ast_cli_register(&odbc_connect_struct);
ast_cli_register(&odbc_show_struct);
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
return 0;
@@ -609,4 +679,4 @@ static const char *key(void)
return ASTERISK_GPL_KEY;
}
STD_MOD(MOD_0, NULL, NULL, NULL);
STD_MOD(MOD_0, reload, NULL, NULL);