Each BTS can be configured for speech support (other than GSM full rate)

Speech codings which are not supported by BTS will be removed from the
bearer capability information element after parsing. This way it is not
required for the MNCC application to consider support of each BTS.

Only GSM full rate is supported by default.

2 files changed, 207 insertions, 0 deletions

diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index 45df90f5f..75e95cbde 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -593,6 +593,17 @@ static void config_write_bts_single(struct vty *vty, struct gsm_bts *bts)
 		}
 	}
 
+	vty_out(vty, "  codec-support fr");
+	if (bts->codec.hr)
+		vty_out(vty, " hr");
+	if (bts->codec.efr)
+		vty_out(vty, " efr");
+	if (bts->codec.afs)
+		vty_out(vty, " afs");
+	if (bts->codec.ahs)
+		vty_out(vty, " ahs");
+	vty_out(vty, "%s", VTY_NEWLINE);
+
 	config_write_bts_gprs(vty, bts);
 
 	if (bts->excl_from_rf_lock)
@@ -2502,6 +2513,169 @@ DEFUN(cfg_bts_no_excl_rf_lock,
 	return CMD_SUCCESS;
 }
 
+DEFUN(cfg_bts_codec1, cfg_bts_codec1_cmd,
+	"codec-support (fr|hr|efr|afs|ahs)",
+	"Codec Support settings\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct bts_codec_conf *codec = &bts->codec;
+	int i;
+
+	codec->hr = 0;
+	codec->efr = 0;
+	codec->afs = 0;
+	codec->ahs = 0;
+	for (i = 0; i < 1; i++) {
+		if (!strcmp(argv[i], "hr"))
+			codec->hr = 1;
+		if (!strcmp(argv[i], "efr"))
+			codec->efr = 1;
+		if (!strcmp(argv[i], "afs"))
+			codec->afs = 1;
+		if (!strcmp(argv[i], "ahs"))
+			codec->ahs = 1;
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_codec2, cfg_bts_codec2_cmd,
+	"codec-support (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)",
+	"Codec Support settings\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct bts_codec_conf *codec = &bts->codec;
+	int i;
+
+	codec->hr = 0;
+	codec->efr = 0;
+	codec->afs = 0;
+	codec->ahs = 0;
+	for (i = 0; i < 2; i++) {
+		if (!strcmp(argv[i], "hr"))
+			codec->hr = 1;
+		if (!strcmp(argv[i], "efr"))
+			codec->efr = 1;
+		if (!strcmp(argv[i], "afs"))
+			codec->afs = 1;
+		if (!strcmp(argv[i], "ahs"))
+			codec->ahs = 1;
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_codec3, cfg_bts_codec3_cmd,
+	"codec-support (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)"
+	" (fr|hr|efr|afs|ahs)",
+	"Codec Support settings\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct bts_codec_conf *codec = &bts->codec;
+	int i;
+
+	codec->hr = 0;
+	codec->efr = 0;
+	codec->afs = 0;
+	codec->ahs = 0;
+	for (i = 0; i < 3; i++) {
+		if (!strcmp(argv[i], "hr"))
+			codec->hr = 1;
+		if (!strcmp(argv[i], "efr"))
+			codec->efr = 1;
+		if (!strcmp(argv[i], "afs"))
+			codec->afs = 1;
+		if (!strcmp(argv[i], "ahs"))
+			codec->ahs = 1;
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_codec4, cfg_bts_codec4_cmd,
+	"codec-support (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)"
+	" (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)",
+	"Codec Support settings\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct bts_codec_conf *codec = &bts->codec;
+	int i;
+
+	codec->hr = 0;
+	codec->efr = 0;
+	codec->afs = 0;
+	codec->ahs = 0;
+	for (i = 0; i < 4; i++) {
+		if (!strcmp(argv[i], "hr"))
+			codec->hr = 1;
+		if (!strcmp(argv[i], "efr"))
+			codec->efr = 1;
+		if (!strcmp(argv[i], "afs"))
+			codec->afs = 1;
+		if (!strcmp(argv[i], "ahs"))
+			codec->ahs = 1;
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_codec5, cfg_bts_codec5_cmd,
+	"codec-support (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)"
+	" (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs) (fr|hr|efr|afs|ahs)",
+	"Codec Support settings\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n"
+	"Full Rate (mandatory)\nHalf Rate\nEnhanced Full Rate\n"
+	"Adaptive Multirate on TCH/F\nAdaptive Multirate on TCH/H\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct bts_codec_conf *codec = &bts->codec;
+	int i;
+
+	codec->hr = 0;
+	codec->efr = 0;
+	codec->afs = 0;
+	codec->ahs = 0;
+	for (i = 0; i < 5; i++) {
+		if (!strcmp(argv[i], "hr"))
+			codec->hr = 1;
+		if (!strcmp(argv[i], "efr"))
+			codec->efr = 1;
+		if (!strcmp(argv[i], "afs"))
+			codec->afs = 1;
+		if (!strcmp(argv[i], "ahs"))
+			codec->ahs = 1;
+	}
+
+	return CMD_SUCCESS;
+}
+
 #define TRX_TEXT "Radio Transceiver\n"
 
 /* per TRX configuration */
@@ -3099,6 +3273,11 @@ int bsc_vty_init(const struct log_info *cat)
 	install_element(BTS_NODE, &cfg_bts_si5_neigh_cmd);
 	install_element(BTS_NODE, &cfg_bts_excl_rf_lock_cmd);
 	install_element(BTS_NODE, &cfg_bts_no_excl_rf_lock_cmd);
+	install_element(BTS_NODE, &cfg_bts_codec1_cmd);
+	install_element(BTS_NODE, &cfg_bts_codec2_cmd);
+	install_element(BTS_NODE, &cfg_bts_codec3_cmd);
+	install_element(BTS_NODE, &cfg_bts_codec4_cmd);
+	install_element(BTS_NODE, &cfg_bts_codec5_cmd);
 
 	install_element(BTS_NODE, &cfg_trx_cmd);
 	install_node(&trx_node, dummy_config_write);
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 0767c722f..45d132e1b 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -79,6 +79,29 @@ struct gsm_lai {
 	uint16_t lac;
 };
 
+static int apply_codec_restrictions(struct gsm_bts *bts,
+	struct gsm_mncc_bearer_cap *bcap)
+{
+	int i, j;
+
+	/* remove unsupported speech versions from list */
+	for (i = 0, j = 0; bcap->speech_ver[i] >= 0; i++) {
+		if (bcap->speech_ver[i] == 0)
+			bcap->speech_ver[j++] = 0;
+		if (bcap->speech_ver[i] == 2 && bts->codec.efr)
+			bcap->speech_ver[j++] = 2;
+		if (bcap->speech_ver[i] == 4 && bts->codec.afs)
+			bcap->speech_ver[j++] = 4;
+		if (bcap->speech_ver[i] == 1 && bts->codec.hr)
+			bcap->speech_ver[j++] = 1;
+		if (bcap->speech_ver[i] == 5 && bts->codec.ahs)
+			bcap->speech_ver[j++] = 5;
+	}
+	bcap->speech_ver[j] = -1;
+
+	return 0;
+}
+
 static uint32_t new_callref = 0x80000001;
 
 void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg)
@@ -1914,6 +1937,7 @@ static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg)
 		setup.fields |= MNCC_F_BEARER_CAP;
 		gsm48_decode_bearer_cap(&setup.bearer_cap,
 				  TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
+		apply_codec_restrictions(trans->conn->bts, &setup.bearer_cap);
 	}
 	/* facility */
 	if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
@@ -2067,6 +2091,7 @@ static int gsm48_cc_rx_call_conf(struct gsm_trans *trans, struct msgb *msg)
 		call_conf.fields |= MNCC_F_BEARER_CAP;
 		gsm48_decode_bearer_cap(&call_conf.bearer_cap,
 				  TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
+		apply_codec_restrictions(trans->conn->bts, &call_conf.bearer_cap);
 	}
 	/* cause */
 	if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
@@ -2755,6 +2780,7 @@ static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg)
 		modify.fields |= MNCC_F_BEARER_CAP;
 		gsm48_decode_bearer_cap(&modify.bearer_cap,
 				  TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
+		apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap);
 	}
 
 	new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY);
@@ -2797,6 +2823,7 @@ static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans, struct msgb *msg
 		modify.fields |= MNCC_F_BEARER_CAP;
 		gsm48_decode_bearer_cap(&modify.bearer_cap,
 				  TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
+		apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap);
 	}
 
 	new_cc_state(trans, GSM_CSTATE_ACTIVE);
@@ -2837,6 +2864,7 @@ static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg)
 		modify.fields |= GSM48_IE_BEARER_CAP;
 		gsm48_decode_bearer_cap(&modify.bearer_cap,
 				  TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
+		apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap);
 	}
 	/* cause */
 	if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {