Added sql_odbc_driver option for mssql db

Add an option to choose the ODBC driver when sql_type is set to mssql

src/ejabberd_option.erl

@@ -137,6 +137,7 @@
 -export([sql_database/0, sql_database/1]).
 -export([sql_keepalive_interval/0, sql_keepalive_interval/1]).
 -export([sql_password/0, sql_password/1]).
+-export([sql_odbc_driver/0, sql_odbc_driver/1]).
 -export([sql_pool_size/0, sql_pool_size/1]).
 -export([sql_port/0, sql_port/1]).
 -export([sql_prepared_statements/0, sql_prepared_statements/1]).
@@ -928,6 +929,13 @@ sql_password() ->
 sql_password(Host) ->
     ejabberd_config:get_option({sql_password, Host}).
 
+-spec sql_odbc_driver() -> binary().
+sql_odbc_driver() ->
+    sql_odbc_driver(global).
+-spec sql_odbc_driver(global | binary()) -> binary().
+sql_odbc_driver(Host) ->
+    ejabberd_config:get_option({sql_odbc_driver, Host}).
+
 -spec sql_pool_size() -> pos_integer().
 sql_pool_size() ->
     sql_pool_size(global).

src/ejabberd_options.erl

@@ -371,6 +371,8 @@ opt_type(sql_keepalive_interval) ->
     econf:timeout(second);
 opt_type(sql_password) ->
     econf:binary();
+opt_type(sql_odbc_driver) ->
+    econf:binary();
 opt_type(sql_pool_size) ->
     econf:pos_int();
 opt_type(sql_port) ->
@@ -645,6 +647,7 @@ options() ->
      {sql_database, undefined},
      {sql_keepalive_interval, undefined},
      {sql_password, <<"">>},
+     {sql_odbc_driver, <<"libtdsodbc.so">>}, % default is FreeTDS driver
      {sql_pool_size,
       fun(Host) ->
 	      case ejabberd_config:get_option({sql_type, Host}) of

src/ejabberd_sql.erl

@@ -52,7 +52,7 @@
 	 encode_term/1,
 	 decode_term/1,
 	 odbcinst_config/0,
-	 init_mssql/0,
+	 init_mssql/1,
 	 keep_alive/2,
 	 to_list/2,
 	 to_array/2]).
@@ -1107,7 +1107,7 @@ db_opts(Host) ->
 	    SSLOpts = get_ssl_opts(Transport, Host),
 	    case Type of
 		mssql ->
-		    [mssql, <<"DRIVER=FreeTDS;SERVER=", Server/binary, ";UID=", User/binary,
+		    [mssql, <<"DRIVER=ODBC;SERVER=", Server/binary, ";UID=", User/binary,
 			      ";DATABASE=", DB/binary ,";PWD=", Pass/binary,
 			      ";PORT=", (integer_to_binary(Port))/binary ,";CLIENT_CHARSET=UTF-8;">>, Timeout];
 		_ ->
@@ -1151,9 +1151,10 @@ get_ssl_opts(ssl, Host) ->
 get_ssl_opts(tcp, _) ->
     [].
 
-init_mssql() ->
-    ODBCINST = io_lib:fwrite("[FreeTDS]~n"
-			     "Driver = libtdsodbc.so~n", []),
+init_mssql(Host) ->
+    Driver = ejabberd_option:sql_odbc_driver(Host),
+    ODBCINST = io_lib:fwrite("[ODBC]~n"
+			     "Driver = ~s~n", [Driver]),
     ?DEBUG("~ts:~n~ts", [odbcinst_config(), ODBCINST]),
     case filelib:ensure_dir(odbcinst_config()) of
 	ok ->

src/ejabberd_sql_sup.erl

@@ -96,7 +96,7 @@ init([Host]) ->
         sqlite ->
             check_sqlite_db(Host);
 	mssql ->
-	    ejabberd_sql:init_mssql();
+	    ejabberd_sql:init_mssql(Host);
         _ ->
             ok
     end,