VIRT-PHY: Added functionality to cooperate with osmocom-bb virt-phy.

This patch improves the virtual physical layer designed to replace the
air interface. The purpose is to get rid of the hardware requirements
and be able to start testing and implementing layer 2 communication
functionality on one machine. Multicast sockets are used to enable
bidirectional communication between the BTS and the MS process.
The GSMTAP protocol designed for wireshark capturing is used to
encapsulate the payload on the virtual physical layer.

* Working mcast socket communication and extraction of its 
  functionality.
* Fixed OML and RSL startup sequences.
* Icludes tests for mcast socket and virtual UM.
* Ecapsulation and parsing methods to and from GSMTAP messages.
* Basic handlers for file descriptor callbacks from incoming mcast
  messages.
* Multiplexing to different channels based on GSMTAP header channel
  type.

1 files changed, 22 insertions, 5 deletions

diff --git a/src/osmo-bts-virtual/main.c b/src/osmo-bts-virtual/main.c
index a27ee453..d4900d61 100644
--- a/src/osmo-bts-virtual/main.c
+++ b/src/osmo-bts-virtual/main.c
@@ -76,12 +76,10 @@ int bts_model_handle_options(int argc, char **argv)
 	while (1) {
 		int option_idx = 0, c;
 		static const struct option long_options[] = {
-			/* specific to this hardware */
-			{ 0, 0, 0, 0 }
-		};
+		/* specific to this hardware */
+		{0, 0, 0, 0}};
 
-		c = getopt_long(argc, argv, "",
-				long_options, &option_idx);
+		c = getopt_long(argc, argv, "", long_options, &option_idx);
 		if (c == -1)
 			break;
 
@@ -101,6 +99,25 @@ void bts_model_abis_close(struct gsm_bts *bts)
 	bts_shutdown(bts, "Abis close");
 }
 
+void bts_model_phy_link_set_defaults(struct phy_link *plink)
+{
+}
+
+void bts_model_phy_instance_set_defaults(struct phy_instance *pinst)
+{
+}
+
+int bts_model_ts_disconnect(struct gsm_bts_trx_ts *ts)
+{
+	return -ENOTSUP;
+}
+
+int bts_model_ts_connect(struct gsm_bts_trx_ts *ts,
+                         enum gsm_phys_chan_config as_pchan)
+{
+	return -ENOTSUP;
+}
+
 int main(int argc, char **argv)
 {
 	return bts_main(argc, argv);