e1_input: rework configuration of virtual E1 line operations

 struct e1inp_line_ops {
-       enum e1inp_line_role    role;
-       char                    *addr;
-       void                    *data;
+       union {
+               struct {
+                       enum e1inp_line_role role;      /* BSC or BTS mode. */
+                       const char *addr;               /* IP address .*/
+                       void *dev;                      /* device parameters. */
+               } ipa;
+               struct {
+                       const char *port;       /* e.g. /dev/ttyUSB0 */
+                       unsigned int delay;
+               } rs232;
+       } cfg;

Now this structure contains the configuration details for the
virtual E1 line, instead of using a pointer.

This also get the line_update callback to its original layout:

+       int (*line_update)(struct e1inp_line *line);

1 files changed, 2 insertions, 4 deletions

diff --git a/src/input/dahdi.c b/src/input/dahdi.c
index 1b366e1d..e4e49051 100644
--- a/src/input/dahdi.c
+++ b/src/input/dahdi.c
@@ -385,8 +385,7 @@ static int dahdi_fd_cb(struct osmo_fd *bfd, unsigned int what)
 	return rc;
 }
 
-static int dahdi_e1_line_update(struct e1inp_line *line,
-				enum e1inp_line_role role, const char *addr);
+static int dahdi_e1_line_update(struct e1inp_line *line);
 
 struct e1inp_driver dahdi_driver = {
 	.name = "dahdi",
@@ -501,8 +500,7 @@ static int dahdi_e1_setup(struct e1inp_line *line)
 	return 0;
 }
 
-static int dahdi_e1_line_update(struct e1inp_line *line,
-				enum e1inp_line_role role, const char *addr)
+static int dahdi_e1_line_update(struct e1inp_line *line)
 {
 	if (line->driver != &dahdi_driver)
 		return -EINVAL;