[M] Change in osmocom-bb[master]: trxcon/l1sched: fix handling of UL FACCH on TCH/A[FH]S

fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmocom-bb/+/33706 ) Change subject: trxcon/l1sched: fix handling of UL FACCH on TCH/A[FH]S ...................................................................... trxcon/l1sched: fix handling of UL FACCH on TCH/A[FH]S In ad8f7794 I changed both tx_tch[fh]_fn() to use a switch statement and introduced a regression by removing special treatment of FACCH: @@ -238,10 +237,16 @@ int tx_tchf_fn(struct l1sched_lchan_state *lchan, - if (msgb_l2len(lchan->prim) == GSM_MACBLOCK_LEN) { - /* Encode payload */ - rc = gsm0503_tch_fr_encode(buffer, msgb_l2(lchan->prim), GSM_MACBLOCK_LEN, 1); - } else if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) { @@ -459,10 +458,15 @@ int tx_tchh_fn(struct l1sched_lchan_state *lchan, - if (msgb_l2len(lchan->prim) == GSM_MACBLOCK_LEN) { - rc = gsm0503_tch_hr_encode(buffer, msgb_l2(lchan->prim), GSM_MACBLOCK_LEN); - lchan->ul_facch_blocks = 6; - } else if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) { Now if the channel mode is GSM48_CMODE_SPEECH_AMR, UL FACCH/[FH] frames will be fed to osmo_amr_rtp_dec(), which is definitely wrong. Fix this by doing all AMR specific checks in a separate function, which is called only for speech frames. Change-Id: Ie217bbb389b5abb95d241781ffe3f5c7b1c188c0 Fixes: ad8f7794 "trxcon/l1sched: remove redundant TCH/[FH] prim length checks" Related: OS#4396 --- M src/host/trxcon/include/osmocom/bb/l1sched/l1sched.h M src/host/trxcon/src/sched_lchan_common.c M src/host/trxcon/src/sched_lchan_tchf.c M src/host/trxcon/src/sched_lchan_tchh.c 4 files changed, 98 insertions(+), 90 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/06/33706/1 diff --git a/src/host/trxcon/include/osmocom/bb/l1sched/l1sched.h b/src/host/trxcon/include/osmocom/bb/l1sched/l1sched.h index d3b079c..715b9a0 100644 --- a/src/host/trxcon/include/osmocom/bb/l1sched/l1sched.h +++ b/src/host/trxcon/include/osmocom/bb/l1sched/l1sched.h @@ -392,6 +392,7 @@ const char *l1sched_burst_mask2str(const uint8_t *mask, int bits); size_t l1sched_bad_frame_ind(uint8_t *l2, struct l1sched_lchan_state *lchan); +bool l1sched_lchan_amr_prim_is_valid(struct l1sched_lchan_state *lchan, bool is_cmr); /* Interleaved TCH/H block TDMA frame mapping */ bool l1sched_tchh_block_map_fn(enum l1sched_lchan_type chan, diff --git a/src/host/trxcon/src/sched_lchan_common.c b/src/host/trxcon/src/sched_lchan_common.c index cddc9e5..26d8f22 100644 --- a/src/host/trxcon/src/sched_lchan_common.c +++ b/src/host/trxcon/src/sched_lchan_common.c @@ -141,3 +141,48 @@ return 0; } } + +bool l1sched_lchan_amr_prim_is_valid(struct l1sched_lchan_state *lchan, bool is_cmr) +{ + enum osmo_amr_type ft_codec; + enum osmo_amr_quality bfi; + uint8_t cmr_codec; + int ft, cmr, len; + int8_t sti, cmi; + + len = osmo_amr_rtp_dec(msgb_l2(lchan->prim), msgb_l2len(lchan->prim), + &cmr_codec, &cmi, &ft_codec, &bfi, &sti); + if (len < 0) { + LOGP_LCHAND(lchan, LOGL_ERROR, "Cannot send invalid AMR payload (%u): %s\n", + msgb_l2len(lchan->prim), msgb_hexdump_l2(lchan->prim)); + return false; + } + ft = -1; + cmr = -1; + for (unsigned int i = 0; i < lchan->amr.codecs; i++) { + if (lchan->amr.codec[i] == ft_codec) + ft = i; + if (lchan->amr.codec[i] == cmr_codec) + cmr = i; + } + if (ft < 0) { + LOGP_LCHAND(lchan, LOGL_ERROR, + "Codec (FT = %d) of RTP frame not in list\n", ft_codec); + return false; + } + if (is_cmr && lchan->amr.ul_ft != ft) { + LOGP_LCHAND(lchan, LOGL_ERROR, + "Codec (FT = %d) of RTP cannot be changed now, but in next frame\n", + ft_codec); + return false; + } + lchan->amr.ul_ft = ft; + if (cmr < 0) { + LOGP_LCHAND(lchan, LOGL_ERROR, + "Codec (CMR = %d) of RTP frame not in list\n", cmr_codec); + } else { + lchan->amr.ul_cmr = cmr; + } + + return true; +} diff --git a/src/host/trxcon/src/sched_lchan_tchf.c b/src/host/trxcon/src/sched_lchan_tchf.c index a4aa80c..9e8256f 100644 --- a/src/host/trxcon/src/sched_lchan_tchf.c +++ b/src/host/trxcon/src/sched_lchan_tchf.c @@ -244,54 +244,20 @@ break; case GSM48_CMODE_SPEECH_AMR: { - int len; - uint8_t cmr_codec; - int ft, cmr, i; - enum osmo_amr_type ft_codec; - enum osmo_amr_quality bfi; - int8_t sti, cmi; - bool amr_fn_is_cmr; - /* the first FN 0,8,17 defines that CMI is included in frame, - * the first FN 4,13,21 defines that CMR is included in frame. - */ - amr_fn_is_cmr = !sched_tchf_ul_amr_cmi_map[br->fn % 26]; + bool amr_fn_is_cmr = !sched_tchf_ul_amr_cmi_map[br->fn % 26]; + const uint8_t *data = msgb_l2(lchan->prim); + size_t data_len = msgb_l2len(lchan->prim); - len = osmo_amr_rtp_dec(msgb_l2(lchan->prim), msgb_l2len(lchan->prim), - &cmr_codec, &cmi, &ft_codec, &bfi, &sti); - if (len < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, "Cannot send invalid AMR payload (%u): %s\n", - msgb_l2len(lchan->prim), msgb_hexdump_l2(lchan->prim)); - goto free_bad_msg; + if (data_len != GSM_MACBLOCK_LEN) { /* TCH/AFS: speech */ + if (!l1sched_lchan_amr_prim_is_valid(lchan, amr_fn_is_cmr)) + goto free_bad_msg; + /* pull the AMR header - sizeof(struct amr_hdr) */ + data_len -= 2; + data += 2; } - ft = -1; - cmr = -1; - for (i = 0; i < lchan->amr.codecs; i++) { - if (lchan->amr.codec[i] == ft_codec) - ft = i; - if (lchan->amr.codec[i] == cmr_codec) - cmr = i; - } - if (ft < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (FT = %d) of RTP frame not in list\n", ft_codec); - goto free_bad_msg; - } - if (amr_fn_is_cmr && lchan->amr.ul_ft != ft) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (FT = %d) of RTP cannot be changed now, but in next frame\n", - ft_codec); - goto free_bad_msg; - } - lchan->amr.ul_ft = ft; - if (cmr < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (CMR = %d) of RTP frame not in list\n", cmr_codec); - } else { - lchan->amr.ul_cmr = cmr; - } + rc = gsm0503_tch_afs_encode(bursts_p, - msgb_l2(lchan->prim) + 2, - msgb_l2len(lchan->prim) - 2, + data, data_len, amr_fn_is_cmr, lchan->amr.codec, lchan->amr.codecs, diff --git a/src/host/trxcon/src/sched_lchan_tchh.c b/src/host/trxcon/src/sched_lchan_tchh.c index 30d623b..6973f91 100644 --- a/src/host/trxcon/src/sched_lchan_tchh.c +++ b/src/host/trxcon/src/sched_lchan_tchh.c @@ -457,54 +457,20 @@ break; case GSM48_CMODE_SPEECH_AMR: { - int len; - uint8_t cmr_codec; - int ft, cmr, i; - enum osmo_amr_type ft_codec; - enum osmo_amr_quality bfi; - int8_t sti, cmi; - bool amr_fn_is_cmr; - /* the first FN 0,8,17 defines that CMI is included in frame, - * the first FN 4,13,21 defines that CMR is included in frame. - */ - amr_fn_is_cmr = !sched_tchh_ul_amr_cmi_map[br->fn % 26]; + bool amr_fn_is_cmr = !sched_tchh_ul_amr_cmi_map[br->fn % 26]; + const uint8_t *data = msgb_l2(lchan->prim); + size_t data_len = msgb_l2len(lchan->prim); - len = osmo_amr_rtp_dec(msgb_l2(lchan->prim), msgb_l2len(lchan->prim), - &cmr_codec, &cmi, &ft_codec, &bfi, &sti); - if (len < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, "Cannot send invalid AMR payload (%u): %s\n", - msgb_l2len(lchan->prim), msgb_hexdump_l2(lchan->prim)); - goto free_bad_msg; + if (data_len != GSM_MACBLOCK_LEN) { /* TCH/AHS: speech */ + if (!l1sched_lchan_amr_prim_is_valid(lchan, amr_fn_is_cmr)) + goto free_bad_msg; + /* pull the AMR header - sizeof(struct amr_hdr) */ + data_len -= 2; + data += 2; } - ft = -1; - cmr = -1; - for (i = 0; i < lchan->amr.codecs; i++) { - if (lchan->amr.codec[i] == ft_codec) - ft = i; - if (lchan->amr.codec[i] == cmr_codec) - cmr = i; - } - if (ft < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (FT = %d) of RTP frame not in list\n", ft_codec); - goto free_bad_msg; - } - if (amr_fn_is_cmr && lchan->amr.ul_ft != ft) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (FT = %d) of RTP cannot be changed now, but in next frame\n", - ft_codec); - goto free_bad_msg; - } - lchan->amr.ul_ft = ft; - if (cmr < 0) { - LOGP_LCHAND(lchan, LOGL_ERROR, - "Codec (CMR = %d) of RTP frame not in list\n", cmr_codec); - } else { - lchan->amr.ul_cmr = cmr; - } + rc = gsm0503_tch_ahs_encode(bursts_p, - msgb_l2(lchan->prim) + 2, - msgb_l2len(lchan->prim) - 2, + data, data_len, amr_fn_is_cmr, lchan->amr.codec, lchan->amr.codecs, -- To view, visit https://gerrit.osmocom.org/c/osmocom-bb/+/33706 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmocom-bb Gerrit-Branch: master Gerrit-Change-Id: Ie217bbb389b5abb95d241781ffe3f5c7b1c188c0 Gerrit-Change-Number: 33706 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria &lt;vyanitskiy(a)sysmocom.de&gt; Gerrit-MessageType: newchange