mncc: Include size and offsets of struct gsm_mncc in the hello
Increase the version number and send the sizeof of the gsm_mncc
and the gsm_data_frame structure. Include the offsets of some
members as well to maybe identify ABI problems.
The reason we go through this is that we want to benefit from
the native ABI and don't want to force packed structs.
diff --git a/openbsc/src/libmsc/mncc_sock.c b/openbsc/src/libmsc/mncc_sock.c
index 697f956..cf4bca8 100644
--- a/openbsc/src/libmsc/mncc_sock.c
+++ b/openbsc/src/libmsc/mncc_sock.c
@@ -2,6 +2,7 @@
/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
* (C) 2009 by Andreas Eversberg <Andreas.Eversberg@versatel.de>
+ * (C) 2012 by Holger Hans Peter Freyther
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
@@ -221,6 +222,12 @@
hello = (struct gsm_mncc_hello *) msgb_put(msg, sizeof(*hello));
hello->msg_type = MNCC_SOCKET_HELLO;
hello->version = MNCC_SOCK_VERSION;
+ hello->mncc_size = sizeof(struct gsm_mncc);
+ hello->data_frame_size = sizeof(struct gsm_data_frame);
+ hello->called_offset = offsetof(struct gsm_mncc, called);
+ hello->signal_offset = offsetof(struct gsm_mncc, signal);
+ hello->emergency_offset = offsetof(struct gsm_mncc, emergency);
+ hello->lchan_type_offset = offsetof(struct gsm_mncc, lchan_type);
msgb_enqueue(&mncc->net->upqueue, msg);
mncc->conn_bfd.when |= BSC_FD_WRITE;