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-rw-r--r--openbsc/src/libbsc/gsm_04_08_utils.c82
1 files changed, 60 insertions, 22 deletions
diff --git a/openbsc/src/libbsc/gsm_04_08_utils.c b/openbsc/src/libbsc/gsm_04_08_utils.c
index fe6f2ab71..ef82555fe 100644
--- a/openbsc/src/libbsc/gsm_04_08_utils.c
+++ b/openbsc/src/libbsc/gsm_04_08_utils.c
@@ -357,6 +357,60 @@ void gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd,
}
}
+int gsm48_multirate_config(uint8_t *lv, struct amr_multirate_conf *mr, int ms)
+{
+ int num = 0, i;
+
+ for (i = 0; i < 8; i++) {
+ if (((mr->gsm48_ie[1] >> i) & 1))
+ num++;
+ }
+ if (num > 4) {
+ LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec with too "
+ "many modes in config.\n");
+ num = 4;
+ }
+ if (num < 1) {
+ LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec with no "
+ "mode in config.\n");
+ num = 1;
+ }
+
+ lv[0] = (num == 1) ? 2 : (num + 2);
+ memcpy(lv + 1, mr->gsm48_ie, 2);
+ if (num == 1)
+ return 0;
+ if (ms) {
+ lv[3] = mr->mode[0].threshold_ms & 0x3f;
+ lv[4] = mr->mode[0].hysteresis_ms << 4;
+ if (num == 2)
+ return 0;
+ lv[4] |= (mr->mode[1].threshold_ms & 0x3f) >> 2;
+ lv[5] = mr->mode[1].threshold_ms << 6;
+ lv[5] |= (mr->mode[1].hysteresis_ms & 0x0f) << 2;
+ if (num == 3)
+ return 0;
+ lv[5] |= (mr->mode[2].threshold_ms & 0x3f) >> 4;
+ lv[6] = mr->mode[2].threshold_ms << 4;
+ lv[6] |= mr->mode[2].hysteresis_ms & 0x0f;
+ } else {
+ lv[3] = mr->mode[0].threshold_bts & 0x3f;
+ lv[4] = mr->mode[0].hysteresis_bts << 4;
+ if (num == 2)
+ return 0;
+ lv[4] |= (mr->mode[1].threshold_bts & 0x3f) >> 2;
+ lv[5] = mr->mode[1].threshold_bts << 6;
+ lv[5] |= (mr->mode[1].hysteresis_bts & 0x0f) << 2;
+ if (num == 3)
+ return 0;
+ lv[5] |= (mr->mode[2].threshold_bts & 0x3f) >> 4;
+ lv[6] = mr->mode[2].threshold_bts << 4;
+ lv[6] |= mr->mode[2].hysteresis_bts & 0x0f;
+ }
+
+ return 0;
+}
+
#define GSM48_HOCMD_CCHDESC_LEN 16
/* Chapter 9.1.15: Handover Command */
@@ -435,17 +489,9 @@ int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan *lchan,
}
/* in case of multi rate we need to attach a config */
- if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) {
- if (lchan->mr_conf.ver == 0) {
- LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec "
- "without multirate config.\n");
- } else {
- uint8_t *data = msgb_put(msg, 4);
- data[0] = GSM48_IE_MUL_RATE_CFG;
- data[1] = 0x2;
- memcpy(&data[2], &lchan->mr_conf, 2);
- }
- }
+ if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR)
+ msgb_tlv_put(msg, GSM48_IE_MUL_RATE_CFG, lchan->mr_ms_lv[0],
+ lchan->mr_ms_lv + 1);
return gsm48_sendmsg(msg);
}
@@ -471,17 +517,9 @@ int gsm48_tx_chan_mode_modify(struct gsm_lchan *lchan, uint8_t mode)
cmm->mode = mode;
/* in case of multi rate we need to attach a config */
- if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) {
- if (lchan->mr_conf.ver == 0) {
- LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec "
- "without multirate config.\n");
- } else {
- uint8_t *data = msgb_put(msg, 4);
- data[0] = GSM48_IE_MUL_RATE_CFG;
- data[1] = 0x2;
- memcpy(&data[2], &lchan->mr_conf, 2);
- }
- }
+ if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR)
+ msgb_tlv_put(msg, GSM48_IE_MUL_RATE_CFG, lchan->mr_ms_lv[0],
+ lchan->mr_ms_lv + 1);
return gsm48_sendmsg(msg);
}