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[L] Change in libosmocore[master]: Add a GSM RLP decoder and encoder
by laforge 23 Nov '23

23 Nov '23

Attention is currently required from: fixeria. Hello Jenkins Builder, fixeria, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email to look at the new patch set (#2). The following approvals got outdated and were removed: Verified-1 by Jenkins Builder Change subject: Add a GSM RLP decoder and encoder ...................................................................... Add a GSM RLP decoder and encoder This code implements a decoder and encoder for the RLP (Radio Link Protocol) as used in the bearer channel of GSM CSD (Circuit Switched Data). Change-Id: I2d9bd8eb4f0cd0f72c436996767b199429596917 --- M include/osmocom/gsm/Makefile.am A include/osmocom/gsm/rlp.h M src/gsm/Makefile.am M src/gsm/libosmogsm.map A src/gsm/rlp.c 5 files changed, 329 insertions(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/23/35123/2 -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I2d9bd8eb4f0cd0f72c436996767b199429596917 Gerrit-Change-Number: 35123 Gerrit-PatchSet: 2 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Attention: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-MessageType: newpatchset

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[M] Change in osmo-bts[master]: Add GSMTAP encapsulation of RLP frames in CSD NT mode
by laforge 23 Nov '23

23 Nov '23

Attention is currently required from: fixeria. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-bts/+/35124?usp=email ) Change subject: Add GSMTAP encapsulation of RLP frames in CSD NT mode ...................................................................... Patch Set 1: (1 comment) Patchset: PS1: this needs to be vty-configurable and should likely contain a [default] setting of suppressing any NULL Frames to avoid filling the pcap with uesless info -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/35124?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: I6a258458822bcb3fe7290a9b9b3d104beecda219 Gerrit-Change-Number: 35124 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-CC: Jenkins Builder Gerrit-Attention: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Comment-Date: Thu, 23 Nov 2023 22:19:49 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Gerrit-MessageType: comment

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[M] Change in osmo-bts[master]: Add GSMTAP encapsulation of RLP frames in CSD NT mode
by laforge 23 Nov '23

23 Nov '23

laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/35124?usp=email ) Change subject: Add GSMTAP encapsulation of RLP frames in CSD NT mode ...................................................................... Add GSMTAP encapsulation of RLP frames in CSD NT mode In CSD (Circuit Switched Data) NT (Non-Transparent) mode, there are RLP (Radio Link Protocol) frames inside the modified V.110. wireshark alrady has a dissector for this, and we've introduced a GSMTAP type for RLP some time ago. So with this patch, we now generate such GSMTAP RLP frames. Change-Id: I6a258458822bcb3fe7290a9b9b3d104beecda219 --- M src/common/l1sap.c 1 file changed, 55 insertions(+), 3 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/24/35124/1 diff --git a/src/common/l1sap.c b/src/common/l1sap.c index c599726..4b2ca02 100644 --- a/src/common/l1sap.c +++ b/src/common/l1sap.c @@ -1841,19 +1841,54 @@ return 1; } -static void send_ul_rtp_packet_data(struct gsm_lchan *lchan, uint32_t fn, +static void gsmtap_csd_ul(struct gsm_lchan *lchan, const struct ph_tch_param *tch_ind, const uint8_t *data, unsigned int data_len) +{ + struct gsm_bts_trx *trx = lchan->ts->trx; + struct gsmtap_inst *inst = trx->bts->gsmtap.inst; + if (!inst) + return; + + if (lchan->csd_mode == LCHAN_CSD_M_NT) { + pbit_t buf[data_len/8+1]; + int len = osmo_ubit2pbit_ext(buf, 0, data, 0, data_len, 1); + gsmtap_send_ex(inst, GSMTAP_TYPE_GSM_RLP, trx->arfcn | GSMTAP_ARFCN_F_UPLINK, lchan->ts->nr, + lchan->type == GSM_LCHAN_TCH_H ? GSMTAP_CHANNEL_TCH_H : GSMTAP_CHANNEL_TCH_F, + lchan->nr, tch_ind->fn, tch_ind->rssi, 0, buf, len); + + } +} + +static void gsmtap_csd_dl(struct gsm_lchan *lchan, const uint8_t *data, unsigned int data_len) +{ + struct gsm_bts_trx *trx = lchan->ts->trx; + struct gsmtap_inst *inst = trx->bts->gsmtap.inst; + if (!inst) + return; + + if (lchan->csd_mode == LCHAN_CSD_M_NT) { + pbit_t buf[data_len/8+1]; + int len = osmo_ubit2pbit_ext(buf, 0, data, 0, data_len, 1); + gsmtap_send_ex(inst, GSMTAP_TYPE_GSM_RLP, trx->arfcn, lchan->ts->nr, + lchan->type == GSM_LCHAN_TCH_H ? GSMTAP_CHANNEL_TCH_H : GSMTAP_CHANNEL_TCH_F, + lchan->nr, 0, 0, 0, buf, len); + } +} + +static void send_ul_rtp_packet_data(struct gsm_lchan *lchan, const struct ph_tch_param *tch_ind, const uint8_t *data, uint16_t data_len) { uint8_t rtp_pl[RFC4040_RTP_PLEN]; int rc; + gsmtap_csd_ul(lchan, tch_ind, data, data_len); + rc = csd_v110_rtp_encode(lchan, &rtp_pl[0], data, data_len); if (rc < 0) return; osmo_rtp_send_frame_ext(lchan->abis_ip.rtp_socket, &rtp_pl[0], sizeof(rtp_pl), - fn_ms_adj(fn, lchan), + fn_ms_adj(tch_ind->fn, lchan), lchan->rtp_tx_marker); /* Only clear the marker bit once we have sent a RTP packet with it */ lchan->rtp_tx_marker = false; @@ -1987,7 +2022,7 @@ send_ul_rtp_packet_speech(lchan, fn, msg->data, msg->len); break; case RSL_CMOD_SPD_DATA: - send_ul_rtp_packet_data(lchan, fn, msg->data, msg->len); + send_ul_rtp_packet_data(lchan, tch_ind, msg->data, msg->len); break; case RSL_CMOD_SPD_SIGN: return 0; /* drop stale TCH.ind */ @@ -2296,6 +2331,7 @@ int rc = csd_v110_rtp_decode(lchan, msg->tail, rtp_pl, rtp_pl_len); if (rc > 0) { + gsmtap_csd_dl(lchan, msg->tail, rc); msgb_put(msg, rc); } else { msgb_free(msg); -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/35124?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: I6a258458822bcb3fe7290a9b9b3d104beecda219 Gerrit-Change-Number: 35124 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-MessageType: newchange

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[L] Change in libosmocore[master]: Add a GSM RLP decoder and encoder
by Jenkins Builder 23 Nov '23

23 Nov '23

Jenkins Builder has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email ) Change subject: Add a GSM RLP decoder and encoder ...................................................................... Patch Set 1: (1 comment) File src/gsm/rlp.c: Robot Comment from checkpatch (run ID jenkins-gerrit-lint-12602): https://gerrit.osmocom.org/c/libosmocore/+/35123/comment/02357150_8ba1b962 PS1, Line 169: fcs = osmo_rlp_fcs_compute(out, out_len -3); need consistent spacing around '-' (ctx:WxV) (or typedef missing in osmo-ci/lint/checkpatch/typedefs_osmo.txt?) -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I2d9bd8eb4f0cd0f72c436996767b199429596917 Gerrit-Change-Number: 35123 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-CC: Jenkins Builder Gerrit-Comment-Date: Thu, 23 Nov 2023 22:13:59 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Gerrit-MessageType: comment

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[L] Change in libosmocore[master]: Add a GSM RLP decoder and encoder
by laforge 23 Nov '23

23 Nov '23

laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email ) Change subject: Add a GSM RLP decoder and encoder ...................................................................... Add a GSM RLP decoder and encoder This code implements a decoder and encoder for the RLP (Radio Link Protocol) as used in the bearer channel of GSM CSD (Circuit Switched Data). Change-Id: I2d9bd8eb4f0cd0f72c436996767b199429596917 --- M include/osmocom/gsm/Makefile.am A include/osmocom/gsm/rlp.h M src/gsm/Makefile.am M src/gsm/libosmogsm.map A src/gsm/rlp.c 5 files changed, 329 insertions(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/23/35123/1 diff --git a/include/osmocom/gsm/Makefile.am b/include/osmocom/gsm/Makefile.am index f840a27..5678a51 100644 --- a/include/osmocom/gsm/Makefile.am +++ b/include/osmocom/gsm/Makefile.am @@ -48,6 +48,7 @@ l1sap.h \ oap.h \ oap_client.h \ + rlp.h \ rsl.h \ rxlev_stat.h \ sysinfo.h \ diff --git a/include/osmocom/gsm/rlp.h b/include/osmocom/gsm/rlp.h new file mode 100644 index 0000000..c0f2f81 --- /dev/null +++ b/include/osmocom/gsm/rlp.h @@ -0,0 +1,78 @@ +/* + * Copyright (C) 2022-2023 Harald Welte <laforge(a)osmocom.org> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + + + +#pragma once +#include <stdint.h> +#include <stdbool.h> +#include <osmocom/core/utils.h> + +/*! \defgroup rlp GSM A5 ciphering algorithm + * @{ + * \file rlp.h */ + +/*! RLP frame type as per 3GPP TS 24.002 Section 5.2.1 */ +enum osmo_rlp_ftype { + OSMO_RLP_FT_U, + OSMO_RLP_FT_S, + OSMO_RLP_FT_IS, +}; +extern const struct value_string osmo_rlp_ftype_vals[]; + +/*! RLP U-Frame Type as per 3GPP TS 24.002 Section 5.2.1 */ +enum osmo_rlp_u_ftype { + OSMO_RLP_U_FT_SABM = 0x07, + OSMO_RLP_U_FT_UA = 0x0c, + OSMO_RLP_U_FT_DISC = 0x08, + OSMO_RLP_U_FT_DM = 0x03, + OSMO_RLP_U_FT_NULL = 0x0f, + OSMO_RLP_U_FT_UI = 0x00, + OSMO_RLP_U_FT_XID = 0x17, + OSMO_RLP_U_FT_TEST = 0x1c, + OSMO_RLP_U_FT_REMAP = 0x11, +}; +extern const struct value_string osmo_rlp_ftype_u_vals[]; + +/*! RLP S-Frame type as per 3GPP TS 24.002 Section 5.2.1 */ +enum osmo_rlp_s_ftype { + OSMO_RLP_S_FT_RR = 0, + OSMO_RLP_S_FT_REJ = 2, + OSMO_RLP_S_FT_RNR = 1, + OSMO_RLP_S_FT_SREJ = 3, +}; +extern const struct value_string osmo_rlp_ftype_s_vals[]; + +/*! Data structure representing one decoded RLP frame */ +struct osmo_rlp_frame_decoded { + uint8_t version; + enum osmo_rlp_ftype ftype; + enum osmo_rlp_u_ftype u_ftype; + enum osmo_rlp_s_ftype s_ftype; + bool c_r; + bool p_f; + uint8_t s_bits; + uint16_t n_s; + uint16_t n_r; + uint32_t fcs; + uint8_t info[536/8]; + uint16_t info_len; +}; + +int osmo_rlp_decode(struct osmo_rlp_frame_decoded *out, uint8_t version, const uint8_t *data, size_t data_len); +uint32_t osmo_rlp_fcs_compute(const uint8_t *in, size_t in_len); + +/*! @} */ diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am index a01189c..67ecf9d 100644 --- a/src/gsm/Makefile.am +++ b/src/gsm/Makefile.am @@ -36,7 +36,7 @@ gsup.c gsup_sms.c gprs_gea.c gsm0503_conv.c oap.c gsm0808_utils.c \ gsm23003.c gsm23236.c mncc.c bts_features.c oap_client.c \ gsm29118.c gsm48_rest_octets.c cbsp.c gsm48049.c \ - gad.c bsslap.c bssmap_le.c kdf.c iuup.c gsm44021.c gsm44068.c + gad.c bsslap.c bssmap_le.c kdf.c iuup.c gsm44021.c gsm44068.c rlp.c libgsmint_la_LDFLAGS = -no-undefined libgsmint_la_LIBADD = $(top_builddir)/src/core/libosmocore.la $(top_builddir)/src/isdn/libosmoisdn.la diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 056d320..19f0254 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -860,5 +860,11 @@ osmo_csd_3k6_encode_frame; osmo_csd_ubit_dump; +osmo_rlp_decode; +osmo_rlp_fcs_compute; +osmo_rlp_ftype_s_vals; +osmo_rlp_ftype_u_vals; +osmo_rlp_ftype_vals; + local: *; }; diff --git a/src/gsm/rlp.c b/src/gsm/rlp.c new file mode 100644 index 0000000..397c89c --- /dev/null +++ b/src/gsm/rlp.c @@ -0,0 +1,230 @@ +/* + * Copyright (C) 2022-2023 Harald Welte <laforge(a)osmocom.org> + * + * All Rights Reserved + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/*! \addtogroup rlp + * @{ + * RLP (Radio Link Protocol) as per 3GPP TS 24.022 *i + * + */ + +#include <stdint.h> +#include <stddef.h> +#include <string.h> +#include <errno.h> + +#include <osmocom/gsm/rlp.h> + +const struct value_string osmo_rlp_ftype_vals[] = { + { OSMO_RLP_FT_U, "U" }, + { OSMO_RLP_FT_S, "S" }, + { OSMO_RLP_FT_IS, "IS" }, + { 0, NULL } +}; + +const struct value_string osmo_rlp_ftype_u_vals[] = { + { OSMO_RLP_U_FT_SABM, "SABM" }, + { OSMO_RLP_U_FT_UA, "UA" }, + { OSMO_RLP_U_FT_DISC, "DISC" }, + { OSMO_RLP_U_FT_DM, "DM" }, + { OSMO_RLP_U_FT_NULL, "NULL" }, + { OSMO_RLP_U_FT_UI, "UI" }, + { OSMO_RLP_U_FT_XID, "XID" }, + { OSMO_RLP_U_FT_TEST, "TEST" }, + { OSMO_RLP_U_FT_REMAP, "REMAP" }, + { 0, NULL } +}; + +const struct value_string osmo_rlp_ftype_s_vals[] = { + { OSMO_RLP_S_FT_RR, "RR" }, + { OSMO_RLP_S_FT_REJ, "REJ" }, + { OSMO_RLP_S_FT_RNR, "RNR" }, + { OSMO_RLP_S_FT_SREJ, "SREJ" }, + { 0, NULL } +}; + + +/*! decode a RLP frame into its abstract representation. Doesn't check FCS correctness. + * \param[out] out caller-allocated memory for output of decoded frame + * \param[in] version RLP version number to use when decoding + * \param[in] data raw RLP frame input data + * \param[in] data_len length of data (in octets) + * \returns 0 in case of success; negative on error */ +int osmo_rlp_decode(struct osmo_rlp_frame_decoded *out, uint8_t version, const uint8_t *data, size_t data_len) +{ + uint8_t n_s, n_r; + + /* we only support 240 bit so far */ + if (data_len != 240/8) + return -EINVAL; + + /* we only support version 0+1 so far */ + if (version >= 2) + return -EINVAL; + + memset(out, 0, sizeof(*out)); + out->version = version; + + out->c_r = data[0] & 1; + n_s = (data[0] >> 3) | (data[1] & 1) << 5; + n_r = (data[1] >> 2); + //out->fcs = (data[240/8-3] << 16) | (data[240/8-2]) << 8 | (data[240/8-1] << 0); + out->fcs = (data[240/8-1] << 16) | (data[240/8-2]) << 8 | (data[240/8-3] << 0); + out->p_f = (data[1] >> 1) & 1; + + if (n_s == 0x3f) { + out->ftype = OSMO_RLP_FT_U; + out->u_ftype = n_r & 0x1f; + } else if (n_s == 0x3e) { + out->ftype = OSMO_RLP_FT_S; + out->s_ftype = (data[0] >> 1) & 3; + out->n_r = n_r; + } else { + out->ftype = OSMO_RLP_FT_IS; + out->s_ftype = (data[0] >> 1) & 3; + out->n_s = n_s; + out->n_r = n_r; + memcpy(out->info, data+2, 240/8 - 5); + out->info_len = 240/8 - 5; + } + + return 0; +} + +/*! encode a RLP frame from its abstract representation. Generates FCS. + * \param[out] out caller-allocated output buffer + * \param[in] out_size size of output buffer (in octets) + * \param[in] in decoded RLP frame which is to be encoded + * \returns number of output bytes used; negative on error */ +int osmo_rlp_encode(uint8_t *out, size_t out_size, const struct osmo_rlp_frame_decoded *in) +{ + uint8_t out_len = 240/8; + uint8_t n_s, n_r, s_bits; + uint32_t fcs; + + /* we only support version 0+1 so far */ + if (in->version >= 2) + return -EINVAL; + + /* we only support 240 bit so far */ + if (in->info_len != 240/8 - 5) + return -EINVAL; + + if (out_size < out_len) + return -EINVAL; + + memset(out, 0, out_len); + + if (in->c_r) + out[0] |= 0x01; + if (in->p_f) + out[1] |= 0x02; + + switch (in->ftype) { + case OSMO_RLP_FT_U: + n_s = 0x3f; + n_r = in->u_ftype; + s_bits = 0; + break; + case OSMO_RLP_FT_S: + n_s = 0x3e; + n_r = in->n_r; + s_bits = in->s_ftype; + break; + case OSMO_RLP_FT_IS: + n_s = in->n_s; + n_r = in->n_r; + s_bits = in->s_ftype; + memcpy(out+2, in->info, in->info_len); + break; + default: + return -EINVAL; + } + + /* patch N(S) into output data */ + out[0] |= (n_s & 0x1F) << 3; + out[1] |= (n_s & 0x20) >> 5; + + /* patch N(R) / M-bits into output data */ + out[1] |= (n_r & 0x3f) << 2; + + /* patch S-bits into output data */ + out[0] |= (s_bits & 3) << 1; + + /* compute FCS + add it to end of frame */ + fcs = osmo_rlp_fcs_compute(out, out_len -3); + out[out_len - 3] = (fcs >> 0) & 0xff; + out[out_len - 2] = (fcs >> 8) & 0xff; + out[out_len - 1] = (fcs >> 16) & 0xff; + + return out_len; +} + + +static const uint32_t rlp_fcs_table[256] = { + 0x00B29D2D, 0x00643A5B, 0x0044D87A, 0x00927F0C, 0x00051C38, 0x00D3BB4E, 0x00F3596F, 0x0025FE19, + 0x008694BC, 0x005033CA, 0x0070D1EB, 0x00A6769D, 0x003115A9, 0x00E7B2DF, 0x00C750FE, 0x0011F788, + 0x00DA8E0F, 0x000C2979, 0x002CCB58, 0x00FA6C2E, 0x006D0F1A, 0x00BBA86C, 0x009B4A4D, 0x004DED3B, + 0x00EE879E, 0x003820E8, 0x0018C2C9, 0x00CE65BF, 0x0059068B, 0x008FA1FD, 0x00AF43DC, 0x0079E4AA, + 0x0062BB69, 0x00B41C1F, 0x0094FE3E, 0x00425948, 0x00D53A7C, 0x00039D0A, 0x00237F2B, 0x00F5D85D, + 0x0056B2F8, 0x0080158E, 0x00A0F7AF, 0x007650D9, 0x00E133ED, 0x0037949B, 0x001776BA, 0x00C1D1CC, + 0x000AA84B, 0x00DC0F3D, 0x00FCED1C, 0x002A4A6A, 0x00BD295E, 0x006B8E28, 0x004B6C09, 0x009DCB7F, + 0x003EA1DA, 0x00E806AC, 0x00C8E48D, 0x001E43FB, 0x008920CF, 0x005F87B9, 0x007F6598, 0x00A9C2EE, + 0x0049DA1E, 0x009F7D68, 0x00BF9F49, 0x0069383F, 0x00FE5B0B, 0x0028FC7D, 0x00081E5C, 0x00DEB92A, + 0x007DD38F, 0x00AB74F9, 0x008B96D8, 0x005D31AE, 0x00CA529A, 0x001CF5EC, 0x003C17CD, 0x00EAB0BB, + 0x0021C93C, 0x00F76E4A, 0x00D78C6B, 0x00012B1D, 0x00964829, 0x0040EF5F, 0x00600D7E, 0x00B6AA08, + 0x0015C0AD, 0x00C367DB, 0x00E385FA, 0x0035228C, 0x00A241B8, 0x0074E6CE, 0x005404EF, 0x0082A399, + 0x0099FC5A, 0x004F5B2C, 0x006FB90D, 0x00B91E7B, 0x002E7D4F, 0x00F8DA39, 0x00D83818, 0x000E9F6E, + 0x00ADF5CB, 0x007B52BD, 0x005BB09C, 0x008D17EA, 0x001A74DE, 0x00CCD3A8, 0x00EC3189, 0x003A96FF, + 0x00F1EF78, 0x0027480E, 0x0007AA2F, 0x00D10D59, 0x00466E6D, 0x0090C91B, 0x00B02B3A, 0x00668C4C, + 0x00C5E6E9, 0x0013419F, 0x0033A3BE, 0x00E504C8, 0x007267FC, 0x00A4C08A, 0x008422AB, 0x005285DD, + 0x001F18F0, 0x00C9BF86, 0x00E95DA7, 0x003FFAD1, 0x00A899E5, 0x007E3E93, 0x005EDCB2, 0x00887BC4, + 0x002B1161, 0x00FDB617, 0x00DD5436, 0x000BF340, 0x009C9074, 0x004A3702, 0x006AD523, 0x00BC7255, + 0x00770BD2, 0x00A1ACA4, 0x00814E85, 0x0057E9F3, 0x00C08AC7, 0x00162DB1, 0x0036CF90, 0x00E068E6, + 0x00430243, 0x0095A535, 0x00B54714, 0x0063E062, 0x00F48356, 0x00222420, 0x0002C601, 0x00D46177, + 0x00CF3EB4, 0x001999C2, 0x00397BE3, 0x00EFDC95, 0x0078BFA1, 0x00AE18D7, 0x008EFAF6, 0x00585D80, + 0x00FB3725, 0x002D9053, 0x000D7272, 0x00DBD504, 0x004CB630, 0x009A1146, 0x00BAF367, 0x006C5411, + 0x00A72D96, 0x00718AE0, 0x005168C1, 0x0087CFB7, 0x0010AC83, 0x00C60BF5, 0x00E6E9D4, 0x00304EA2, + 0x00932407, 0x00458371, 0x00656150, 0x00B3C626, 0x0024A512, 0x00F20264, 0x00D2E045, 0x00044733, + 0x00E45FC3, 0x0032F8B5, 0x00121A94, 0x00C4BDE2, 0x0053DED6, 0x008579A0, 0x00A59B81, 0x00733CF7, + 0x00D05652, 0x0006F124, 0x00261305, 0x00F0B473, 0x0067D747, 0x00B17031, 0x00919210, 0x00473566, + 0x008C4CE1, 0x005AEB97, 0x007A09B6, 0x00ACAEC0, 0x003BCDF4, 0x00ED6A82, 0x00CD88A3, 0x001B2FD5, + 0x00B84570, 0x006EE206, 0x004E0027, 0x0098A751, 0x000FC465, 0x00D96313, 0x00F98132, 0x002F2644, + 0x00347987, 0x00E2DEF1, 0x00C23CD0, 0x00149BA6, 0x0083F892, 0x00555FE4, 0x0075BDC5, 0x00A31AB3, + 0x00007016, 0x00D6D760, 0x00F63541, 0x00209237, 0x00B7F103, 0x00615675, 0x0041B454, 0x00971322, + 0x005C6AA5, 0x008ACDD3, 0x00AA2FF2, 0x007C8884, 0x00EBEBB0, 0x003D4CC6, 0x001DAEE7, 0x00CB0991, + 0x00686334, 0x00BEC442, 0x009E2663, 0x00488115, 0x00DFE221, 0x00094557, 0x0029A776, 0x00FF0000 +}; + +/*! compute RLP FCS according to 3GPP TS 24.022 Section 4.4. + * \param[in] in input data over which to compute FCS + * \param[in] in_len length of input data (in octets) + * \returns computed frame check sequence (FCS). */ +uint32_t osmo_rlp_fcs_compute(const uint8_t *in, size_t in_len) +{ + uint32_t divider = 0; + size_t i; + + for (i = 0; i < in_len; i++) { + uint8_t input = in[i] ^ (divider & 0xff); + divider = (divider >> 8) ^ rlp_fcs_table[input]; + } + + return divider; +} + +/*! @} */ -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35123?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I2d9bd8eb4f0cd0f72c436996767b199429596917 Gerrit-Change-Number: 35123 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-MessageType: newchange

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[L] Change in libosmocore[master]: core: Add software UART implementation
by fixeria 23 Nov '23

23 Nov '23

Attention is currently required from: laforge. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/30763?usp=email ) Change subject: core: Add software UART implementation ...................................................................... Patch Set 4: (3 comments) File include/osmocom/core/soft_uart.h: https://gerrit.osmocom.org/c/libosmocore/+/30763/comment/8cd3f6c6_22facbf6 PS3, Line 38: OSMO_SUART_F_BREAK = (1 << 2), So far there was no need to do anything else with those flags other than setting/unsetting and checking them. In the original Harald's code it was actually as you suggested (0, 1, 2), but the code was using them incorrectly, as if they were the actual flags (i.e. without doing 1 << N). So I fixed the problem this way. > Anyway, just saying, if FOO_FIVE == 0x10, it's not so trivial to calculate that back to a 5.) In the worst case one can use the libc's `ffs()` function. But well, even you cannot remember the actual use case for doing this math :P https://gerrit.osmocom.org/c/libosmocore/+/30763/comment/14be204f_4345560c PS3, Line 52: stop bots > a stop bot, is that a traffic light? =) Haha! Nice one :D Fixed in this patch: https://gerrit.osmocom.org/c/libosmocore/+/35122 File src/core/soft_uart.c: https://gerrit.osmocom.org/c/libosmocore/+/30763/comment/c0506d87_99e2c06b PS3, Line 4: * (C) 2022 by Harald Welte <laforge(a)gnumonks.org> > 2022-2023? […] This patch is mostly Harald's original code from 2022 (https://cgit.osmocom.org/libosmocore/commit/?h=laforge/libosmoisdn&id=c776d…) with a small number of cosmetic edits from my side, plus the `OSMO_SUART_F_` fix that I squashed into this patch. The code is further improved and completed in subsequent patches (one of them adding Sysmocom to this header). -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/30763?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I2ca95963fd5852ddb89bdd35b86b31489127fe84 Gerrit-Change-Number: 30763 Gerrit-PatchSet: 4 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: jolly <andreas(a)eversberg.eu> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-CC: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-CC: neels <nhofmeyr(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Comment-Date: Thu, 23 Nov 2023 20:05:20 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: neels <nhofmeyr(a)sysmocom.de> Gerrit-MessageType: comment

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[S] Change in libosmocore[master]: soft_uart: fix spelling in doxygen docs
by fixeria 23 Nov '23

23 Nov '23

fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/35122?usp=email ) Change subject: soft_uart: fix spelling in doxygen docs ...................................................................... soft_uart: fix spelling in doxygen docs Change-Id: Ib719d1fe4ee6c058860e861c91ec2417d9dff0af --- M include/osmocom/core/soft_uart.h 1 file changed, 12 insertions(+), 3 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/22/35122/1 diff --git a/include/osmocom/core/soft_uart.h b/include/osmocom/core/soft_uart.h index 2b108c4..097d2ee 100644 --- a/include/osmocom/core/soft_uart.h +++ b/include/osmocom/core/soft_uart.h @@ -51,7 +51,7 @@ struct osmo_soft_uart_cfg { /*! number of data bits (typically 5, 6, 7 or 8) */ uint8_t num_data_bits; - /*! number of stop bots (typically 1 or 2) */ + /*! number of stop bits (typically 1 or 2) */ uint8_t num_stop_bits; /*! parity mode (none, even, odd) */ enum osmo_soft_uart_parity_mode parity_mode; @@ -59,7 +59,7 @@ * before calling the receive call-back */ unsigned int rx_buf_size; /*! receive timeout; UART will flush receive buffer via the receive call-back - * after indicated number of milli-seconds even if it is not full yet */ + * after indicated number of milliseconds even if it is not full yet */ unsigned int rx_timeout_ms; /*! opaque application-private data; passed to call-backs */ @@ -71,7 +71,7 @@ void (*rx_cb)(void *priv, struct msgb *rx_data, unsigned int flags); /*! transmit call-back. The implementation is expected to provide at most - * tx_data->data_len characters (the actual amount is detetmined by the + * tx_data->data_len characters (the actual amount is determined by the * number of requested bits and the effective UART configuration). */ void (*tx_cb)(void *priv, struct msgb *tx_data); -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35122?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: Ib719d1fe4ee6c058860e861c91ec2417d9dff0af Gerrit-Change-Number: 35122 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-MessageType: newchange

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[S] Change in pysim[master]: pySim-shell: refuse to execute a startup script on initialization errors
by fixeria 23 Nov '23

23 Nov '23

Attention is currently required from: dexter, laforge. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/pysim/+/35102?usp=email ) Change subject: pySim-shell: refuse to execute a startup script on initialization errors ...................................................................... Patch Set 1: Code-Review+1 -- To view, visit https://gerrit.osmocom.org/c/pysim/+/35102?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: pysim Gerrit-Branch: master Gerrit-Change-Id: I61329988e0e9021b5b0ef8e0819fb8e23cabf38b Gerrit-Change-Number: 35102 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: dexter <pmaier(a)sysmocom.de> Gerrit-Comment-Date: Thu, 23 Nov 2023 19:41:20 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

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[S] Change in pysim[master]: app: do not catch exceptions in init_card
by fixeria 23 Nov '23

23 Nov '23

Attention is currently required from: dexter, laforge. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/pysim/+/35101?usp=email ) Change subject: app: do not catch exceptions in init_card ...................................................................... Patch Set 1: (1 comment) File pySim/app.py: https://gerrit.osmocom.org/c/pysim/+/35101/comment/83ab8558_2c1e42ce PS1, Line 69: raise ValueError Not sure about this particular change. IIUC, currently it is possible to interact with the card, even if no matching profile could be found. With your patch it's no longer possible because you raise an exception instead of returning `(None, card)`. -- To view, visit https://gerrit.osmocom.org/c/pysim/+/35101?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: pysim Gerrit-Branch: master Gerrit-Change-Id: I581125d8273ef024f6dbf3a5db6116be15c5c95d Gerrit-Change-Number: 35101 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: dexter <pmaier(a)sysmocom.de> Gerrit-Comment-Date: Thu, 23 Nov 2023 19:40:03 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Gerrit-MessageType: comment

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[S] Change in osmo-sgsn[master]: libgtp: Check for all successful create_pdp_conf causes
by daniel 23 Nov '23

23 Nov '23

Attention is currently required from: laforge, lynxis lazus, osmith. daniel has removed a vote from this change. ( https://gerrit.osmocom.org/c/osmo-sgsn/+/35094?usp=email ) Change subject: libgtp: Check for all successful create_pdp_conf causes ...................................................................... Removed Code-Review-2 by daniel <dwillmann(a)sysmocom.de> -- To view, visit https://gerrit.osmocom.org/c/osmo-sgsn/+/35094?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-sgsn Gerrit-Branch: master Gerrit-Change-Id: I11ce72908c2dfb983887e6c1db316fd7de42f027 Gerrit-Change-Number: 35094 Gerrit-PatchSet: 3 Gerrit-Owner: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: lynxis lazus <lynxis(a)fe80.eu> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: osmith <osmith(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: lynxis lazus <lynxis(a)fe80.eu> Gerrit-MessageType: deleteVote

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