dialog: SDP can be passed to MI/RPC dlg_bridge

- rework from a patch of Patrick E.

modules/dialog/dialog.c

@@ -1097,7 +1097,7 @@ static int w_dlg_bridge(struct sip_msg *msg, char *from, char *to, char *op)
 		return -1;
 	}
 
-	if(dlg_bridge(&sf, &st, &so)!=0)
+	if(dlg_bridge(&sf, &st, &so, NULL)!=0)
 		return -1;
 	return 1;
 }
@@ -1345,6 +1345,7 @@ struct mi_root * mi_dlg_bridge(struct mi_root *cmd_tree, void *param)
 	str from = {0,0};
 	str to = {0,0};
 	str op = {0,0};
+	str bd = {0,0};
 	struct mi_node* node;
 
 	node = cmd_tree->node.kids;
@@ -1374,9 +1375,23 @@ struct mi_root * mi_dlg_bridge(struct mi_root *cmd_tree, void *param)
 		{
 			return init_mi_tree(500, "Bad OP value", 12);
 		}
+		if(op.len==1 && *op.s=='.')
+		{
+			op.s = NULL;
+			op.len = 0;
+		}
+		node= node->next;
+		if(node != NULL)
+		{
+			bd = node->value;
+			if(bd.len<=0 || bd.s==NULL)
+			{
+				return init_mi_tree(500, "Bad SDP value", 13);
+			}
+		}
 	}
 
-	if(dlg_bridge(&from, &to, &op)!=0)
+	if(dlg_bridge(&from, &to, &op, &bd)!=0)
 		return init_mi_tree(500, MI_INTERNAL_ERR_S,  MI_INTERNAL_ERR_LEN);
 
 	return init_mi_tree(200, MI_OK_S, MI_OK_LEN);
@@ -1676,6 +1691,7 @@ static void rpc_dlg_bridge(rpc_t *rpc, void *c) {
 	str from = {NULL,0};
 	str to = {NULL,0};
 	str op = {NULL,0};
+	str bd = {NULL,0};
 	int n;
 
 	n = rpc->scan(c, "SS", &from, &to);
@@ -1687,9 +1703,18 @@ static void rpc_dlg_bridge(rpc_t *rpc, void *c) {
 	if(rpc->scan(c, "*S", &op)<1) {
 		op.s = NULL;
 		op.len = 0;
+	} else {
+		if(op.len==1 && *op.s=='.') {
+			op.s = NULL;
+			op.len = 0;
+		}
+		if(rpc->scan(c, "*S", &bd)<1) {
+			bd.s = NULL;
+			bd.len = 0;
+		}
 	}
 
-	dlg_bridge(&from, &to, &op);
+	dlg_bridge(&from, &to, &op, &bd);
 }
 
 static rpc_export_t rpc_methods[] = {

modules/dialog/dlg_transfer.c

@@ -311,7 +311,7 @@ error:
 }
 
 
-int dlg_bridge(str *from, str *to, str *op)
+int dlg_bridge(str *from, str *to, str *op, str *bd)
 {
 	dlg_transfer_ctx_t *dtc;
 	int ret;
@@ -350,8 +350,13 @@ int dlg_bridge(str *from, str *to, str *op)
 
 	LM_DBG("bridge <%.*s> to <%.*s>\n", dtc->from.len, dtc->from.s,
 			dtc->to.len, dtc->to.s);
-	s_body.s   = DLG_HOLD_SDP;
-	s_body.len = DLG_HOLD_SDP_LEN;
+	if(bd!=NULL && bd->s!=NULL && bd->len>0) {
+		s_body.s = bd->s;
+		s_body.len = bd->len;
+	} else {
+		s_body.s   = DLG_HOLD_SDP;
+		s_body.len = DLG_HOLD_SDP_LEN;
+	}
 
 	memset(&uac_r, '\0', sizeof(uac_req_t));
 	uac_r.method = &s_method;

modules/dialog/dlg_transfer.h

@@ -32,7 +32,7 @@ typedef struct _dlg_transfer_ctx {
 	struct dlg_cell *dlg;
 } dlg_transfer_ctx_t;
 
-int dlg_bridge(str *from, str *to, str *op);
+int dlg_bridge(str *from, str *to, str *op, str *bd);
 int dlg_transfer(struct dlg_cell *dlg, str *to, int side);
 int dlg_bridge_init_hdrs(void);
 void dlg_bridge_destroy_hdrs(void);