Max has uploaded this change for review. ( https://gerrit.osmocom.org/12020
Change subject: LCLS, TS 48.008: add GCR IE encoding/decoding
......................................................................
LCLS, TS 48.008: add GCR IE encoding/decoding
* add functions to encode Global Call. Ref. from TS 29.205 as 3GPP TS
48.008 §3.2.2.115 information element
* add corresponding tests
Change-Id: I82ce0207dc8de50689a8806c6471ad7fbae6219d
---
M include/osmocom/gsm/gsm0808_utils.h
M src/gsm/gsm0808_utils.c
M src/gsm/libosmogsm.map
M tests/gsm0808/gsm0808_test.c
M tests/gsm0808/gsm0808_test.ok
5 files changed, 103 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/20/12020/1
diff --git a/include/osmocom/gsm/gsm0808_utils.h
b/include/osmocom/gsm/gsm0808_utils.h
index 57aa6ea..5de0d9d 100644
--- a/include/osmocom/gsm/gsm0808_utils.h
+++ b/include/osmocom/gsm/gsm0808_utils.h
@@ -81,6 +81,10 @@
const struct sockaddr_storage *ss);
int gsm0808_dec_aoip_trasp_addr(struct sockaddr_storage *ss,
const uint8_t *elem, uint8_t len);
+
+uint8_t gsm0808_enc_gcr(struct msgb *msg, const struct gsm29205_gcr *g);
+int gsm0808_dec_gcr(struct gsm29205_gcr *g, struct tlv_parsed *tp);
+
uint8_t gsm0808_enc_speech_codec(struct msgb *msg,
const struct gsm0808_speech_codec *sc);
int gsm0808_dec_speech_codec(struct gsm0808_speech_codec *sc,
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index c58d828..9f7ec7e 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -482,6 +482,42 @@
return (int)(elem - old_elem);
}
+/*! Create BSSMAP Global Call Reference, 3GPP TS 48.008 §3.2.2.115
+ * \param[out] msg Message Buffer for appending IE
+ * \param[in] g Global Call Reference, 3GPP TS 29.205 Table B 2.1.9.1
+ * \returns number of bytes added to \a msg or 0 on error */
+uint8_t gsm0808_enc_gcr(struct msgb *msg, const struct gsm29205_gcr *g)
+{
+ uint8_t enc, *len;
+
+ len = msgb_v_put(msg, GSM0808_IE_GLOBAL_CALL_REF);
+
+ /* reserve space for length */
+ msgb_v_put(msg, 0); /* len points to this reserved space already */
+
+ enc = gsm29205_enc_gcr(msg, g);
+ if (enc) {
+ len[0] = enc;
+ return enc + 2; /* type (1 byte) + length (1 byte) */
+ }
+
+ return 0;
+}
+
+/*! Decode BSSMAP Global Call Reference, 3GPP TS 29.205 Table B 2.1.9.1
+ * \param[out] gcr Caller-provided memory to store Global Call Reference
+ * \param[in] elem IE value to be decoded
+ * \param[in] len Length of \a elem in bytes
+ * \returns number of bytes parsed; negative on error */
+int gsm0808_dec_gcr(struct gsm29205_gcr *gcr, struct tlv_parsed *tp)
+{
+ const uint8_t *buf = TLVP_VAL_MINLEN(tp, GSM0808_IE_GLOBAL_CALL_REF,
OSMO_GCR_MIN_LEN);
+ if (!buf)
+ return -EINVAL;
+
+ return 2 + gsm29205_dec_gcr(gcr, buf, TLVP_LEN(tp,
GSM0808_IE_GLOBAL_CALL_REF));
+}
+
/*! Encode TS 08.08 Encryption Information IE
* \param[out] msg Message Buffer to which IE is to be appended
* \param[in] ei Encryption Information to be encoded
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index e1012b2..390b546 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -146,6 +146,8 @@
gsm29205_enc_gcr;
gsm29205_dec_gcr;
+gsm0808_enc_gcr;
+gsm0808_dec_gcr;
gsm0808_att_tlvdef;
gsm0808_bssap_name;
diff --git a/tests/gsm0808/gsm0808_test.c b/tests/gsm0808/gsm0808_test.c
index 197ec06..e428970 100644
--- a/tests/gsm0808/gsm0808_test.c
+++ b/tests/gsm0808/gsm0808_test.c
@@ -569,6 +569,61 @@
msgb_free(in_msg);
}
+static void test_enc_dec_gcr()
+{
+ static const uint8_t res[] = {
+ GSM0808_IE_GLOBAL_CALL_REF,
+ 0x0d, /* GCR length */
+ 0x03, /* .net_len */
+ 0x4f, 0x4f, 0x4f, /* .net */
+ 0x02, /* .node length */
+ 0xde, 0xad, /* .node */
+ 0x05, /* length of Call. Ref. */
+ 0x4e, 0x4e, 0x4e, 0x4e, 0x4e /* .cr - Call. Ref. */
+ };
+ uint8_t len;
+ struct msgb *msg;
+ struct gsm29205_gcr g = { .net_len = 3, .node = 0xDEAD }, p = { 0 };
+ int rc;
+ struct tlv_parsed tp;
+ msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "global
call reference");
+ if (!msg)
+ return;
+
+ memset(g.cr, 'N', sizeof(g.cr));
+ memset(g.net, 'O', g.net_len);
+
+ len = gsm0808_enc_gcr(msg, &g);
+ printf("Testing Global Call Reference IE encoder...\n\t%d bytes added:
%s\n",
+ len, len == ARRAY_SIZE(res) ? "OK" : "FAIL");
+
+ if (!msgb_cmpr(__func__, __LINE__, msg, res, ARRAY_SIZE(res), true))
+ abort();
+
+ rc = osmo_bssap_tlv_parse(&tp, msgb_data(msg), msgb_length(msg));
+ if (rc < 0)
+ printf("parsing failed: %s [%s]\n", strerror(-rc),
msgb_hexdump(msg));
+
+ rc = gsm0808_dec_gcr(&p, &tp);
+ if (rc < 0)
+ printf("decoding failed: %s [%s]\n", strerror(-rc),
msgb_hexdump(msg));
+
+ if (p.net_len != g.net_len)
+ printf("Network ID length parsed wrong: %u != %u\n", p.net_len,
g.net_len);
+
+ if (p.node != g.node)
+ printf("Node ID parsed wrong: 0x%X != 0x%X\n", p.node, g.node);
+
+ if (memcmp(p.net, g.net, g.net_len) != 0)
+ printf("Network ID parsed wrong: %s\n", osmo_hexdump(p.net,
p.net_len));
+
+ if (memcmp(p.cr, g.cr, 5) != 0)
+ printf("Call ref. ID parsed wrong: %s\n", osmo_hexdump(p.cr,
5));
+
+ printf("\tdecoded %d bytes: %s\n", rc, rc == len ? "OK" : "FAIL");
+ msgb_free(msg);
+}
+
static void test_enc_dec_aoip_trasp_addr_v4()
{
struct sockaddr_storage enc_addr;
@@ -1791,6 +1846,9 @@
test_create_paging();
test_create_dtap();
test_prepend_dtap();
+
+ test_enc_dec_gcr();
+
test_enc_dec_aoip_trasp_addr_v4();
test_enc_dec_aoip_trasp_addr_v6();
test_gsm0808_enc_dec_speech_codec();
diff --git a/tests/gsm0808/gsm0808_test.ok b/tests/gsm0808/gsm0808_test.ok
index a48cf1d..f38dac3 100644
--- a/tests/gsm0808/gsm0808_test.ok
+++ b/tests/gsm0808/gsm0808_test.ok
@@ -20,6 +20,9 @@
Testing creating Paging Request
Testing creating DTAP
Testing prepend DTAP
+Testing Global Call Reference IE encoder...
+ 15 bytes added: OK
+ decoded 15 bytes: OK
test_gsm0808_enc_dec_cell_id_list_lac: encoded: 1a 07 05 01 24 ab cd 56 78 (rc
= 9)
------- test_cell_id_list_add
cell_id_list == CGI[0]:{}
--
To view, visit https://gerrit.osmocom.org/12020
To unsubscribe, or for help writing mail filters, visit
https://gerrit.osmocom.org/settings
Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I82ce0207dc8de50689a8806c6471ad7fbae6219d
Gerrit-Change-Number: 12020
Gerrit-PatchSet: 1
Gerrit-Owner: Max <msur...@sysmocom.de>
