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-rw-r--r--include/osmocom/gsm/protocol/gsm_08_08.h2
-rw-r--r--src/gsm/gsm0808_utils.c100
-rw-r--r--tests/gsm0808/gsm0808_test.c77
3 files changed, 118 insertions, 61 deletions
diff --git a/include/osmocom/gsm/protocol/gsm_08_08.h b/include/osmocom/gsm/protocol/gsm_08_08.h
index 7656c388..9e00d23f 100644
--- a/include/osmocom/gsm/protocol/gsm_08_08.h
+++ b/include/osmocom/gsm/protocol/gsm_08_08.h
@@ -447,8 +447,6 @@ struct gsm0808_speech_codec {
bool tf;
uint8_t type;
uint16_t cfg;
- bool type_extended;
- bool cfg_present;
};
/* 3GPP TS 48.008 3.2.2.103 Speech Codec List */
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index bdd02e56..60fb91cd 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -151,6 +151,32 @@ static uint8_t enc_speech_codec(struct msgb *msg,
/* See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
uint8_t header = 0;
uint8_t *old_tail;
+ bool type_extended;
+
+ /* Note: Extended codec types are codec types that require 8 instead
+ * of 4 bit to fully specify the selected codec. In the following,
+ * we check if we work with an extended type or not. We also check
+ * if the codec type is valid at all. */
+ switch(sc->type) {
+ case GSM0808_SCT_FR1:
+ case GSM0808_SCT_FR2:
+ case GSM0808_SCT_FR3:
+ case GSM0808_SCT_FR4:
+ case GSM0808_SCT_FR5:
+ case GSM0808_SCT_HR1:
+ case GSM0808_SCT_HR3:
+ case GSM0808_SCT_HR4:
+ case GSM0808_SCT_HR6:
+ type_extended = false;
+ break;
+ case GSM0808_SCT_CSD:
+ type_extended = true;
+ break;
+ default:
+ /* Invalid codec type specified */
+ OSMO_ASSERT(false);
+ break;
+ }
old_tail = msg->tail;
@@ -162,20 +188,37 @@ static uint8_t enc_speech_codec(struct msgb *msg,
header |= (1 << 5);
if (sc->tf)
header |= (1 << 4);
- if (sc->type_extended) {
+
+ if (type_extended) {
header |= 0x0f;
msgb_put_u8(msg, header);
+ msgb_put_u8(msg, sc->type);
} else {
OSMO_ASSERT(sc->type < 0x0f);
header |= sc->type;
msgb_put_u8(msg, header);
- return (uint8_t) (msg->tail - old_tail);
}
- msgb_put_u8(msg, sc->type);
-
- if (sc->cfg_present)
+ /* Note: Whether a configuration is present or not depends on the
+ * selected codec type. If present, it can either consist of one
+ * or two octets, depending on the codec type */
+ switch (sc->type) {
+ case GSM0808_SCT_FR3:
+ case GSM0808_SCT_HR3:
+ case GSM0808_SCT_HR6:
msgb_put_u16(msg, sc->cfg);
+ break;
+ case GSM0808_SCT_FR4:
+ case GSM0808_SCT_FR5:
+ case GSM0808_SCT_HR4:
+ case GSM0808_SCT_CSD:
+ OSMO_ASSERT((sc->cfg & 0xff00) == 0)
+ msgb_put_u8(msg, (uint8_t) sc->cfg & 0xff);
+ break;
+ default:
+ OSMO_ASSERT(sc->cfg == 0);
+ break;
+ }
return (uint8_t) (msg->tail - old_tail);
}
@@ -244,21 +287,42 @@ int gsm0808_dec_speech_codec(struct gsm0808_speech_codec *sc,
if ((header & 0x0F) != 0x0F) {
sc->type = (header & 0x0F);
- return (int)(elem - old_elem);
+ } else {
+ sc->type = *elem;
+ elem++;
+ len--;
}
- sc->type = *elem;
- elem++;
- len--;
-
- sc->type_extended = true;
-
- if (len < 2)
- return (int)(elem - old_elem);
-
- sc->cfg = osmo_load16be(elem);
- elem += 2;
- sc->cfg_present = true;
+ /* Note: Whether a configuration is present or not depends on the
+ * selected codec type. If present, it can either consist of one or
+ * two octets depending on the codec type */
+ switch (sc->type) {
+ case GSM0808_SCT_FR1:
+ case GSM0808_SCT_FR2:
+ case GSM0808_SCT_HR1:
+ break;
+ case GSM0808_SCT_HR4:
+ case GSM0808_SCT_CSD:
+ case GSM0808_SCT_FR4:
+ case GSM0808_SCT_FR5:
+ if (len < 1)
+ return -EINVAL;
+ sc->cfg = *elem;
+ elem++;
+ break;
+ case GSM0808_SCT_FR3:
+ case GSM0808_SCT_HR3:
+ case GSM0808_SCT_HR6:
+ if (len < 2)
+ return -EINVAL;
+ sc->cfg = osmo_load16be(elem);
+ elem += 2;
+ break;
+ default:
+ /* Invalid codec type => malformed speech codec element! */
+ return -EINVAL;
+ break;
+ }
return (int)(elem - old_elem);
}
diff --git a/tests/gsm0808/gsm0808_test.c b/tests/gsm0808/gsm0808_test.c
index 8304052d..68771a45 100644
--- a/tests/gsm0808/gsm0808_test.c
+++ b/tests/gsm0808/gsm0808_test.c
@@ -49,19 +49,17 @@ static void setup_codec_list(struct gsm0808_speech_codec_list *scl)
scl->codec[0].pi = true;
scl->codec[0].tf = true;
- scl->codec[0].type = 0xab;
- scl->codec[0].type_extended = true;
- scl->codec[0].cfg_present = true;
+ scl->codec[0].type = GSM0808_SCT_FR3;
scl->codec[0].cfg = 0xcdef;
scl->codec[1].fi = true;
scl->codec[1].pt = true;
- scl->codec[1].type = 0x05;
+ scl->codec[1].type = GSM0808_SCT_FR2;
scl->codec[2].fi = true;
scl->codec[2].tf = true;
- scl->codec[2].type = 0xf2;
- scl->codec[2].type_extended = true;
+ scl->codec[2].type = GSM0808_SCT_CSD;
+ scl->codec[2].cfg = 0xc0;
scl->len = 3;
}
@@ -89,8 +87,9 @@ static void test_create_layer3_aoip()
static const uint8_t res[] = {
0x00, 0x17, 0x57, 0x05, 0x08, 0x00, 0x77, 0x62,
0x83, 0x33, 0x66, 0x44, 0x88, 0x17, 0x01, 0x23,
- GSM0808_IE_SPEECH_CODEC_LIST, 0x07, 0x5f, 0xab, 0xcd, 0xef,
- 0xa5, 0x9f, 0xf2
+ GSM0808_IE_SPEECH_CODEC_LIST, 0x07, GSM0808_SCT_FR3 | 0x50,
+ 0xcd, 0xef, GSM0808_SCT_FR2 | 0xa0, 0x9f,
+ GSM0808_SCT_CSD | 0x90, 0xc0
};
struct msgb *msg, *in_msg;
@@ -282,9 +281,10 @@ static void test_create_ass()
static const uint8_t res2[] =
{ 0x00, 0x20, 0x01, 0x0b, 0x04, 0x01, 0x0b, 0xa1, 0x25, 0x01, 0x00,
0x04, GSM0808_IE_AOIP_TRASP_ADDR, 0x06, 0xc0, 0xa8, 0x64, 0x17,
- 0x04, 0xd2, GSM0808_IE_SPEECH_CODEC_LIST, 0x07, 0x5f, 0xab, 0xcd,
- 0xef, 0xa5, 0x9f, 0xf2, GSM0808_IE_CALL_ID, 0xaa, 0xbb, 0xcc,
- 0xdd };
+ 0x04, 0xd2, GSM0808_IE_SPEECH_CODEC_LIST, 0x07,
+ GSM0808_SCT_FR3 | 0x50, 0xcd, 0xef, GSM0808_SCT_FR2 | 0xa0, 0x9f,
+ GSM0808_SCT_CSD | 0x90, 0xc0, GSM0808_IE_CALL_ID, 0xaa, 0xbb,
+ 0xcc, 0xdd };
struct msgb *msg;
struct gsm0808_channel_type ct;
@@ -351,9 +351,9 @@ static void test_create_ass_compl_aoip()
static const uint8_t res[] =
{ 0x00, 0x1d, 0x02, 0x15, 0x23, 0x21, 0x42, 0x2c, 0x11, 0x40, 0x22,
GSM0808_IE_AOIP_TRASP_ADDR, 0x06, 0xc0, 0xa8, 0x64, 0x17, 0x04,
- 0xd2, GSM0808_IE_SPEECH_CODEC, 0x01, 0x9a,
- GSM0808_IE_SPEECH_CODEC_LIST, 0x07, 0x5f, 0xab, 0xcd, 0xef, 0xa5,
- 0x9f, 0xf2 };
+ 0xd2, GSM0808_IE_SPEECH_CODEC, 0x01, GSM0808_SCT_HR1 | 0x90,
+ GSM0808_IE_SPEECH_CODEC_LIST, 0x07, GSM0808_SCT_FR3 | 0x50, 0xcd,
+ 0xef, GSM0808_SCT_FR2 | 0xa0, 0x9f, GSM0808_SCT_CSD | 0x90, 0xc0 };
struct msgb *msg;
memset(&sin, 0, sizeof(sin));
@@ -367,7 +367,7 @@ static void test_create_ass_compl_aoip()
memset(&sc, 0, sizeof(sc));
sc.fi = true;
sc.tf = true;
- sc.type = 0x0a;
+ sc.type = GSM0808_SCT_HR1;
setup_codec_list(&sc_list);
@@ -400,11 +400,12 @@ static void test_create_ass_fail_aoip()
{
static const uint8_t res1[] =
{ 0x00, 0x0d, 0x03, 0x04, 0x01, 0x23, GSM0808_IE_SPEECH_CODEC_LIST,
- 0x07, 0x5f, 0xab, 0xcd, 0xef, 0xa5, 0x9f, 0xf2 };
+ 0x07, GSM0808_SCT_FR3 | 0x50, 0xcd, 0xef, GSM0808_SCT_FR2 | 0xa0,
+ 0x9f, GSM0808_SCT_CSD | 0x90, 0xc0 };
static const uint8_t res2[] =
{ 0x00, 0x0f, 0x03, 0x04, 0x01, 0x23, 0x15, 0x02,
- GSM0808_IE_SPEECH_CODEC_LIST, 0x07, 0x5f, 0xab,
- 0xcd, 0xef, 0xa5, 0x9f, 0xf2 };
+ GSM0808_IE_SPEECH_CODEC_LIST, 0x07, GSM0808_SCT_FR3 | 0x50, 0xcd,
+ 0xef, GSM0808_SCT_FR2 | 0xa0, 0x9f, GSM0808_SCT_CSD | 0x90, 0xc0 };
uint8_t rr_res = 2;
struct msgb *msg;
struct gsm0808_speech_codec_list sc_list;
@@ -574,7 +575,7 @@ static void test_gsm0808_enc_dec_speech_codec()
memset(&enc_sc, 0, sizeof(enc_sc));
enc_sc.fi = true;
enc_sc.pt = true;
- enc_sc.type = 0x05;
+ enc_sc.type = GSM0808_SCT_FR2;
msg = msgb_alloc(1024, "output buffer");
rc_enc = gsm0808_enc_speech_codec(msg, &enc_sc);
@@ -589,7 +590,7 @@ static void test_gsm0808_enc_dec_speech_codec()
}
-static void test_gsm0808_enc_dec_speech_codec_ext_with_cfg()
+static void test_gsm0808_enc_dec_speech_codec_with_cfg()
{
struct gsm0808_speech_codec enc_sc;
struct gsm0808_speech_codec dec_sc;
@@ -599,24 +600,22 @@ static void test_gsm0808_enc_dec_speech_codec_ext_with_cfg()
enc_sc.pi = true;
enc_sc.tf = true;
- enc_sc.type = 0xab;
- enc_sc.type_extended = true;
- enc_sc.cfg_present = true;
- enc_sc.cfg = 0xcdef;
+ enc_sc.type = GSM0808_SCT_FR3;
+ enc_sc.cfg = 0xabcd;
msg = msgb_alloc(1024, "output buffer");
rc_enc = gsm0808_enc_speech_codec(msg, &enc_sc);
- OSMO_ASSERT(rc_enc == 6);
+ OSMO_ASSERT(rc_enc == 5);
rc_dec = gsm0808_dec_speech_codec(&dec_sc, msg->data + 2, msg->len - 2);
- OSMO_ASSERT(rc_dec == 4);
+ OSMO_ASSERT(rc_dec == 3);
OSMO_ASSERT(memcmp(&enc_sc, &dec_sc, sizeof(enc_sc)) == 0);
msgb_free(msg);
}
-static void test_gsm0808_enc_dec_speech_codec_ext()
+static void test_gsm0808_enc_dec_speech_codec_ext_with_cfg()
{
struct gsm0808_speech_codec enc_sc;
struct gsm0808_speech_codec dec_sc;
@@ -624,19 +623,17 @@ static void test_gsm0808_enc_dec_speech_codec_ext()
uint8_t rc_enc;
int rc_dec;
- enc_sc.fi = true;
+ enc_sc.pi = true;
enc_sc.tf = true;
- enc_sc.type = 0xf2;
- enc_sc.type_extended = true;
- enc_sc.cfg_present = false;
- enc_sc.cfg = 0x0000;
+ enc_sc.type = GSM0808_SCT_CSD;
+ enc_sc.cfg = 0xc0;
msg = msgb_alloc(1024, "output buffer");
rc_enc = gsm0808_enc_speech_codec(msg, &enc_sc);
- OSMO_ASSERT(rc_enc == 4);
+ OSMO_ASSERT(rc_enc == 5);
rc_dec = gsm0808_dec_speech_codec(&dec_sc, msg->data + 2, msg->len - 2);
- OSMO_ASSERT(rc_dec == 2);
+ OSMO_ASSERT(rc_dec == 3);
OSMO_ASSERT(memcmp(&enc_sc, &dec_sc, sizeof(enc_sc)) == 0);
@@ -655,19 +652,17 @@ static void test_gsm0808_enc_dec_speech_codec_list()
enc_scl.codec[0].pi = true;
enc_scl.codec[0].tf = true;
- enc_scl.codec[0].type = 0xab;
- enc_scl.codec[0].type_extended = true;
- enc_scl.codec[0].cfg_present = true;
+ enc_scl.codec[0].type = GSM0808_SCT_FR3;
enc_scl.codec[0].cfg = 0xcdef;
enc_scl.codec[1].fi = true;
enc_scl.codec[1].pt = true;
- enc_scl.codec[1].type = 0x05;
+ enc_scl.codec[1].type = GSM0808_SCT_FR2;
enc_scl.codec[2].fi = true;
enc_scl.codec[2].tf = true;
- enc_scl.codec[2].type = 0xf2;
- enc_scl.codec[2].type_extended = true;
+ enc_scl.codec[2].type = GSM0808_SCT_CSD;
+ enc_scl.codec[2].cfg = 0xc0;
enc_scl.len = 3;
@@ -860,8 +855,8 @@ int main(int argc, char **argv)
test_enc_dec_aoip_trasp_addr_v4();
test_enc_dec_aoip_trasp_addr_v6();
test_gsm0808_enc_dec_speech_codec();
- test_gsm0808_enc_dec_speech_codec_ext();
test_gsm0808_enc_dec_speech_codec_ext_with_cfg();
+ test_gsm0808_enc_dec_speech_codec_with_cfg();
test_gsm0808_enc_dec_speech_codec_list();
test_gsm0808_enc_dec_channel_type();
test_gsm0808_enc_dec_encrypt_info();
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-26 13:48:54 +0000