[LAPD] Support multiple instances of LAPD

We cannot afford static/global state, as we may have multiple E1
lines, each having its own LAPD instance.  Furthermore, we might
even have multiple LAPD instances on the same E1 line (think of
a multi-drop setup).

This also implements dynamic TEI allocation, i.e. no hardcoded
TEI list anymore.

1 files changed, 5 insertions, 1 deletions

diff --git a/openbsc/include/openbsc/e1_input.h b/openbsc/include/openbsc/e1_input.h
index ca8d5a65a..95b9dd1cc 100644
--- a/openbsc/include/openbsc/e1_input.h
+++ b/openbsc/include/openbsc/e1_input.h
@@ -87,7 +87,11 @@ struct e1inp_ts {
 			/* ip.access driver has one fd for each ts */
 			struct bsc_fd fd;
 		} ipaccess;
-
+		struct {
+			/* DAHDI driver has one fd for each ts */
+			struct bsc_fd fd;
+			struct lapd_instance *lapd;
+		} dahdi;
 	} driver;
 };