libosmo-gtlv: add TLIV capability

During code review, it was indicated that some TLV protocols that we
will likely deal with in the near future also employ an I, and instance
value of a tag. Add TLIV support.

A usage example for a manually implemented TLIV structure is found in
tests/libosmo-gtlv/gtlv_test.c.

A usage example for a generated TLIV protocol is found in
tests/libosmo-gtlv/test_tliv/.

Related: SYS#5599
Change-Id: I0a076e54dfba6038cc779cb7c8f3967d212226aa

1 files changed, 71 insertions, 0 deletions

diff --git a/tests/libosmo-gtlv/test_tliv/gen__myproto_ies_auto.c b/tests/libosmo-gtlv/test_tliv/gen__myproto_ies_auto.c
new file mode 100644
index 0000000..21e70d9
--- /dev/null
+++ b/tests/libosmo-gtlv/test_tliv/gen__myproto_ies_auto.c
@@ -0,0 +1,71 @@
+/*
+ * (C) 2021-2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * All Rights Reserved.
+ *
+ * Author: Neels Janosch Hofmeyr <nhofmeyr@sysmocom.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/gtlv/gtlv_gen.h>
+
+#define O OSMO_GTLV_GEN_O
+#define M OSMO_GTLV_GEN_M
+#define O_MULTI OSMO_GTLV_GEN_O_MULTI
+#define M_MULTI OSMO_GTLV_GEN_M_MULTI
+#define O_INST OSMO_GTLV_GEN_O_INST
+#define M_INST OSMO_GTLV_GEN_M_INST
+
+#define AUTO osmo_gtlv_gen_ie_auto
+
+static const struct osmo_gtlv_gen_ie bar = {
+	.tag_name = "bar",
+};
+
+static const struct osmo_gtlv_gen_ie_o ies_in_moo_msg[] = {
+	M_INST("MYPROTO_IEI_BAR_ALPHA", bar, "bar_alpha"),
+	O_INST("MYPROTO_IEI_BAR_BETA", bar, "bar_beta"),
+	M_INST("MYPROTO_IEI_BAR_GAMMA", bar, "bar_gamma"),
+	{}
+};
+
+static const struct osmo_gtlv_gen_msg msg_defs[] = {
+	{ "moo", ies_in_moo_msg },
+	{}
+};
+
+int main(int argc, const char **argv)
+{
+	struct osmo_gtlv_gen_cfg cfg = {
+		.proto_name = "myproto",
+		.message_type_enum = "enum myproto_msg_type",
+		.message_type_prefix = "MYPROTO_MSGT_",
+		.tag_enum = "enum myproto_iei",
+		.tag_prefix = "MYPROTO_IEI_",
+		.decoded_type_prefix = "struct myproto_ie_",
+		.h_header = "#include \"myproto_ies_custom.h\"",
+		.c_header = "#include <myproto_ies_auto.h>",
+		.msg_defs = msg_defs,
+		.add_enc_to_str = true,
+	};
+	return osmo_gtlv_gen_main(&cfg, argc, argv);
+}