ipa: Properly parse LV stream of a ID_GET request

For some reason the structure is closer to be a LV (length
and value). The value is actually a tag but it is counted
inside the length. Introduce an overload of the parse function
to provide an offset for the length. This will be taken from
the returned length.

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/utils/utils_test.c b/tests/utils/utils_test.c
index b21b074b..1a79baa3 100644
--- a/tests/utils/utils_test.c
+++ b/tests/utils/utils_test.c
@@ -20,6 +20,9 @@
  *
  */
 
+#include <osmocom/gsm/ipa.h>
+
+#include <osmocom/core/logging.h>
 #include <osmocom/core/utils.h>
 
 #include <stdio.h>
@@ -40,8 +43,66 @@ static void hexdump_test(void)
 	printf("%s\n", osmo_hexdump_nospc(data, ARRAY_SIZE(data)));
 }
 
+static void test_idtag_parsing(void)
+{
+	struct tlv_parsed tvp;
+	int rc;
+
+        static uint8_t data[] = {
+		0x01, 0x08,
+		0x01, 0x07,
+		0x01, 0x02,
+		0x01, 0x03,
+		0x01, 0x04,
+		0x01, 0x05,
+		0x01, 0x01,
+		0x01, 0x00,
+		0x11, 0x23, 0x4e, 0x6a, 0x28, 0xd2, 0xa2, 0x53, 0x3a, 0x2a, 0x82, 0xa7, 0x7a, 0xef, 0x29, 0xd4, 0x44, 0x30,
+		0x11, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+        };
+
+	rc = ipa_ccm_idtag_parse_off(&tvp, data, sizeof(data), 1);
+	OSMO_ASSERT(rc == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 8));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 8) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 7));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 7) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 2));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 2) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 3));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 3) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 4));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 4) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 5));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 5) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 1));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 1) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 0));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 0) == 0);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 0x23));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 0x23) == 16);
+
+	OSMO_ASSERT(TLVP_PRESENT(&tvp, 0x24));
+	OSMO_ASSERT(TLVP_LEN(&tvp, 0x24) == 16);
+
+	OSMO_ASSERT(!TLVP_PRESENT(&tvp, 0x25));
+}
+
 int main(int argc, char **argv)
 {
+	static const struct log_info log_info = {};
+	log_init(&log_info, NULL);
+
 	hexdump_test();
+	test_idtag_parsing();
 	return 0;
 }