implemented freetdm config nodes and ss7 initial configuration

libs/freetdm/src/ftdm_config.c

@@ -29,6 +29,10 @@
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Contributors: 
+ *
+ * Moises Silva <moy@sangoma.com>
  */
 
 #include "freetdm.h"
@@ -239,6 +243,82 @@ FT_DECLARE (int) ftdm_config_get_cas_bits(char *strvalue, unsigned char *outbits
 	return 0;
 }
 
+#define PARAMETERS_CHUNK_SIZE 20
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_create(const char *name, ftdm_conf_node_t **node, ftdm_conf_node_t *parent)
+{
+	ftdm_conf_node_t *newnode;
+	ftdm_conf_node_t *sibling = NULL;
+
+	ftdm_assert_return(name != NULL, FTDM_FAIL, "null node name");
+
+	newnode = ftdm_calloc(1, sizeof(**node));
+	if (!newnode) {
+		return FTDM_MEMERR;
+	}
+
+	strncpy(newnode->name, name, sizeof(newnode->name)-1);	
+	newnode->name[sizeof(newnode->name)-1] = 0;
+
+	newnode->parameters = ftdm_calloc(PARAMETERS_CHUNK_SIZE, sizeof(*newnode->parameters));
+	if (!newnode->parameters) {
+		ftdm_safe_free(newnode);
+		return FTDM_MEMERR;
+	}
+	newnode->t_parameters = PARAMETERS_CHUNK_SIZE;
+
+	if (parent) {
+		/* store who my parent is */
+		newnode->parent = parent;
+		/* save any siblings */
+		sibling = parent->child;
+		/* as a newborn I am first */
+		parent->child = newnode;
+		if (sibling) {
+			/* store a pointer to my next sibling */
+			newnode->next = sibling;
+		}
+	}
+
+	*node = newnode;
+
+	return FTDM_SUCCESS;
+}
+
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_add_param(ftdm_conf_node_t *node, const char *param, const char *val)
+{
+	void *newparameters;
+
+	ftdm_assert_return(param != NULL, FTDM_FAIL, "param is null");
+	ftdm_assert_return(val != NULL, FTDM_FAIL, "val is null");
+
+	if (node->n_parameters == node->t_parameters) {
+		newparameters = ftdm_realloc(node->parameters, (node->t_parameters + PARAMETERS_CHUNK_SIZE) * sizeof(*node->parameters));
+		if (!newparameters) {
+			return FTDM_MEMERR;
+		}
+		node->parameters = newparameters;
+		node->t_parameters = node->n_parameters + PARAMETERS_CHUNK_SIZE;
+	}
+	node->parameters[node->n_parameters].var = param;
+	node->parameters[node->n_parameters].val = val;
+	node->n_parameters++;
+	return FTDM_SUCCESS;
+}
+
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_destroy(ftdm_conf_node_t *node)
+{
+	ftdm_conf_node_t *curr = NULL;
+	ftdm_conf_node_t *child = node->child;
+	while (child) {
+		curr = child;
+		child = curr->next;
+		ftdm_conf_node_destroy(curr);
+	}
+	ftdm_free(node->parameters);
+	ftdm_free(node);
+	return FTDM_SUCCESS;
+}
+
 /* For Emacs:
  * Local Variables:
  * mode:c

libs/freetdm/src/include/freetdm.h

@@ -827,6 +827,9 @@ FT_DECLARE(char *) ftdm_api_execute(const char *type, const char *cmd);
 FT_DECLARE(int) ftdm_vasprintf(char **ret, const char *fmt, va_list ap);
 FT_DECLARE(ftdm_status_t) ftdm_channel_set_caller_data(ftdm_channel_t *ftdmchan, ftdm_caller_data_t *caller_data);
 FT_DECLARE(void) ftdm_cpu_monitor_disable(void);
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_create(const char *name, ftdm_conf_node_t **node, ftdm_conf_node_t *parent);
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_add_param(ftdm_conf_node_t *node, const char *param, const char *val);
+FT_DECLARE(ftdm_status_t) ftdm_conf_node_destroy(ftdm_conf_node_t *node);
 
 FIO_CODEC_FUNCTION(fio_slin2ulaw);
 FIO_CODEC_FUNCTION(fio_ulaw2slin);

libs/freetdm/src/include/ftdm_types.h

@@ -572,12 +572,28 @@ typedef ftdm_status_t (*fio_api_t) FIO_API_ARGS ;
 
 #include "ftdm_dso.h"
 
+#define FTDM_NODE_NAME_SIZE 50
 typedef struct ftdm_conf_node_s {
-	char name[255];
-	ftdm_conf_parameter_t attr[10];
-	ftdm_conf_parameter_t settings[100];
-	struct ftdm_conf_node_t *childs;
-	struct ftdm_config_node_s *next;
+	/* node name */
+	char name[FTDM_NODE_NAME_SIZE];
+
+	/* total slots for parameters */
+	unsigned int t_parameters;
+
+	/* current number of parameters */
+	unsigned int n_parameters;
+
+	/* array of parameters */
+	ftdm_conf_parameter_t *parameters;
+
+	/* first node child */
+	struct ftdm_conf_node_s *child;
+
+	/* next node sibling */
+	struct ftdm_conf_node_s *next;
+
+	/* my parent if any */
+	struct ftdm_conf_node_s *parent;
 } ftdm_conf_node_t;
 
 typedef struct {