mirror of https://gerrit.osmocom.org/libosmocore
1360 lines
36 KiB
C
1360 lines
36 KiB
C
/*
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* (C) 2016 by sysmocom - s.f.m.c. GmbH, Author: Philipp Maier
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* All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include <osmocom/core/utils.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/byteswap.h>
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#include <string.h>
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#include <errno.h>
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#include <osmocom/gsm/protocol/gsm_08_08.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/gsm/gsm0808_utils.h>
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#define IP_V4_ADDR_LEN 4
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#define IP_V6_ADDR_LEN 16
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#define IP_PORT_LEN 2
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#define CHANNEL_TYPE_ELEMENT_MAXLEN 11
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#define CHANNEL_TYPE_ELEMENT_MINLEN 3
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#define ENCRYPT_INFO_ELEMENT_MINLEN 1
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#include <netinet/in.h>
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/*! \addtogroup gsm0808
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* @{
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* \file gsm0808_utils.c
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*/
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/*! Encode TS 08.08 AoIP transport address IE
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* \param[out] msg Message Buffer to which to append IE
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* \param[in] ss Socket Address to be used in IE
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* \returns number of bytes added to \a msg */
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uint8_t gsm0808_enc_aoip_trasp_addr(struct msgb *msg,
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const struct sockaddr_storage *ss)
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{
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/* See also 3GPP TS 48.008 3.2.2.102 AoIP Transport Layer Address */
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struct sockaddr_in *sin;
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struct sockaddr_in6 *sin6;
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uint16_t port = 0;
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uint8_t *ptr;
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uint8_t *old_tail;
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uint8_t *tlv_len;
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OSMO_ASSERT(msg);
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OSMO_ASSERT(ss);
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OSMO_ASSERT(ss->ss_family == AF_INET || ss->ss_family == AF_INET6);
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msgb_put_u8(msg, GSM0808_IE_AOIP_TRASP_ADDR);
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tlv_len = msgb_put(msg,1);
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old_tail = msg->tail;
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switch (ss->ss_family) {
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case AF_INET:
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sin = (struct sockaddr_in *)ss;
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port = osmo_ntohs(sin->sin_port);
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ptr = msgb_put(msg, IP_V4_ADDR_LEN);
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memcpy(ptr, &sin->sin_addr.s_addr, IP_V4_ADDR_LEN);
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break;
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case AF_INET6:
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sin6 = (struct sockaddr_in6 *)ss;
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port = osmo_ntohs(sin6->sin6_port);
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ptr = msgb_put(msg, IP_V6_ADDR_LEN);
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memcpy(ptr, sin6->sin6_addr.s6_addr, IP_V6_ADDR_LEN);
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break;
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}
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msgb_put_u16(msg, port);
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*tlv_len = (uint8_t) (msg->tail - old_tail);
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return *tlv_len + 2;
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}
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/*! Decode TS 08.08 AoIP transport address IE
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* \param[out] ss Caller-provided memory where decoded socket addr is stored
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* \param[in] elem pointer to IE value
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* \param[in] len length of \a elem in bytes
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* \returns number of bytes parsed */
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int gsm0808_dec_aoip_trasp_addr(struct sockaddr_storage *ss,
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const uint8_t *elem, uint8_t len)
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{
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/* See also 3GPP TS 48.008 3.2.2.102 AoIP Transport Layer Address */
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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const uint8_t *old_elem = elem;
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OSMO_ASSERT(ss);
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if (!elem)
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return -EINVAL;
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if (len == 0)
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return -EINVAL;
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memset(ss, 0, sizeof(*ss));
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switch (len) {
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case IP_V4_ADDR_LEN + IP_PORT_LEN:
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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memcpy(&sin.sin_addr.s_addr, elem, IP_V4_ADDR_LEN);
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elem += IP_V4_ADDR_LEN;
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sin.sin_port = osmo_load16le(elem);
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elem += IP_PORT_LEN;
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memcpy(ss, &sin, sizeof(sin));
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break;
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case IP_V6_ADDR_LEN + IP_PORT_LEN:
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memset(&sin6, 0, sizeof(sin6));
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sin6.sin6_family = AF_INET6;
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memcpy(sin6.sin6_addr.s6_addr, elem, IP_V6_ADDR_LEN);
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elem += IP_V6_ADDR_LEN;
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sin6.sin6_port = osmo_load16le(elem);
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elem += IP_PORT_LEN;
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memcpy(ss, &sin6, sizeof(sin6));
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break;
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default:
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/* Malformed element! */
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return -EINVAL;
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break;
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}
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return (int)(elem - old_elem);
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}
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#endif /* HAVE_SYS_SOCKET_H */
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/* Helper function for gsm0808_enc_speech_codec()
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* and gsm0808_enc_speech_codec_list() */
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static uint8_t enc_speech_codec(struct msgb *msg,
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const struct gsm0808_speech_codec *sc)
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{
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/* See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
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uint8_t header = 0;
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uint8_t *old_tail;
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bool type_extended = false;
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/* Note: Extended codec types are codec types that require 8 instead
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* of 4 bit to fully specify the selected codec. In the following,
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* we check if we work with an extended type or not. We also check
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* if the codec type is valid at all. */
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switch(sc->type) {
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case GSM0808_SCT_FR1:
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case GSM0808_SCT_FR2:
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case GSM0808_SCT_FR3:
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case GSM0808_SCT_FR4:
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case GSM0808_SCT_FR5:
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case GSM0808_SCT_HR1:
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case GSM0808_SCT_HR3:
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case GSM0808_SCT_HR4:
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case GSM0808_SCT_HR6:
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type_extended = false;
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break;
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case GSM0808_SCT_CSD:
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type_extended = true;
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break;
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default:
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/* Invalid codec type specified */
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OSMO_ASSERT(false);
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break;
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}
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old_tail = msg->tail;
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if (sc->fi)
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header |= (1 << 7);
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if (sc->pi)
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header |= (1 << 6);
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if (sc->pt)
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header |= (1 << 5);
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if (sc->tf)
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header |= (1 << 4);
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if (type_extended) {
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header |= 0x0f;
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msgb_put_u8(msg, header);
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msgb_put_u8(msg, sc->type);
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} else {
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OSMO_ASSERT(sc->type < 0x0f);
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header |= sc->type;
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msgb_put_u8(msg, header);
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}
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/* Note: Whether a configuration is present or not depends on the
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* selected codec type. If present, it can either consist of one
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* or two octets, depending on the codec type */
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switch (sc->type) {
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case GSM0808_SCT_FR3:
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case GSM0808_SCT_HR3:
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case GSM0808_SCT_HR6:
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msgb_put_u16(msg, osmo_ntohs(sc->cfg));
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break;
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case GSM0808_SCT_FR4:
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case GSM0808_SCT_FR5:
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case GSM0808_SCT_HR4:
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case GSM0808_SCT_CSD:
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OSMO_ASSERT((sc->cfg & 0xff00) == 0)
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msgb_put_u8(msg, (uint8_t) sc->cfg & 0xff);
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break;
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default:
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OSMO_ASSERT(sc->cfg == 0);
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break;
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}
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return (uint8_t) (msg->tail - old_tail);
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}
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/*! Encode TS 08.08 Speech Codec IE
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* \param[out] msg Message Buffer to which IE will be appended
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* \param[in] sc Speech Codec to be encoded into IE
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* \returns number of bytes appended to \a msg */
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uint8_t gsm0808_enc_speech_codec(struct msgb *msg,
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const struct gsm0808_speech_codec *sc)
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{
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/*! See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
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uint8_t *old_tail;
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uint8_t *tlv_len;
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OSMO_ASSERT(msg);
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OSMO_ASSERT(sc);
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msgb_put_u8(msg, GSM0808_IE_SPEECH_CODEC);
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tlv_len = msgb_put(msg, 1);
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old_tail = msg->tail;
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enc_speech_codec(msg, sc);
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*tlv_len = (uint8_t) (msg->tail - old_tail);
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return *tlv_len + 2;
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}
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/*! Decode TS 08.08 Speech Codec IE
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* \param[out] sc Caller-allocated memory for Speech Codec
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* \param[in] elem IE value to be decoded
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* \param[in] len Length of \a elem in bytes
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* \returns number of bytes parsed; negative on error */
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int gsm0808_dec_speech_codec(struct gsm0808_speech_codec *sc,
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const uint8_t *elem, uint8_t len)
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{
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/* See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
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uint8_t header;
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const uint8_t *old_elem = elem;
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OSMO_ASSERT(sc);
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if (!elem)
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return -EINVAL;
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if (len == 0)
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return -EINVAL;
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memset(sc, 0, sizeof(*sc));
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header = *elem;
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/* An extended codec type needs at least two fields,
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* bail if the input data length is not sufficient. */
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if ((header & 0x0F) == 0x0F && len < 2)
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return -EINVAL;
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elem++;
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len--;
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if (header & (1 << 7))
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sc->fi = true;
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if (header & (1 << 6))
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sc->pi = true;
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if (header & (1 << 5))
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sc->pt = true;
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if (header & (1 << 4))
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sc->tf = true;
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if ((header & 0x0F) != 0x0F) {
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sc->type = (header & 0x0F);
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} else {
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sc->type = *elem;
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elem++;
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len--;
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}
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/* Note: Whether a configuration is present or not depends on the
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* selected codec type. If present, it can either consist of one or
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* two octets depending on the codec type */
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switch (sc->type) {
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case GSM0808_SCT_FR1:
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case GSM0808_SCT_FR2:
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case GSM0808_SCT_HR1:
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break;
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case GSM0808_SCT_HR4:
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case GSM0808_SCT_CSD:
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case GSM0808_SCT_FR4:
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case GSM0808_SCT_FR5:
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if (len < 1)
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return -EINVAL;
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sc->cfg = *elem;
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elem++;
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break;
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case GSM0808_SCT_FR3:
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case GSM0808_SCT_HR3:
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case GSM0808_SCT_HR6:
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if (len < 2)
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return -EINVAL;
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sc->cfg = osmo_load16le(elem);
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elem += 2;
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break;
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default:
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/* Invalid codec type => malformed speech codec element! */
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return -EINVAL;
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break;
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}
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return (int)(elem - old_elem);
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}
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/*! Encode TS 08.08 Speech Codec list
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* \param[out] msg Message Buffer to which IE is to be appended
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* \param[in] scl Speech Codec List to be encoded into IE
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* \returns number of bytes added to \a msg */
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uint8_t gsm0808_enc_speech_codec_list(struct msgb *msg,
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const struct gsm0808_speech_codec_list *scl)
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{
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/*! See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
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uint8_t *old_tail;
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uint8_t *tlv_len;
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unsigned int i;
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uint8_t rc;
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unsigned int bytes_used = 0;
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OSMO_ASSERT(msg);
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OSMO_ASSERT(scl);
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/* Empty list */
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OSMO_ASSERT(scl->len >= 1);
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msgb_put_u8(msg, GSM0808_IE_SPEECH_CODEC_LIST);
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tlv_len = msgb_put(msg, 1);
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old_tail = msg->tail;
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for (i = 0; i < scl->len; i++) {
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rc = enc_speech_codec(msg, &scl->codec[i]);
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OSMO_ASSERT(rc >= 1);
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bytes_used += rc;
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OSMO_ASSERT(bytes_used <= 255);
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}
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*tlv_len = (uint8_t) (msg->tail - old_tail);
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return *tlv_len + 2;
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}
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/*! Decode TS 08.08 Speech Codec list IE
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* \param[out] scl Caller-provided memory to store codec list
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* \param[in] elem IE value to be decoded
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* \param[in] len Length of \a elem in bytes
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* \returns number of bytes parsed; negative on error */
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int gsm0808_dec_speech_codec_list(struct gsm0808_speech_codec_list *scl,
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const uint8_t *elem, uint8_t len)
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{
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/*! See also 3GPP TS 48.008 3.2.2.103 Speech Codec List */
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const uint8_t *old_elem = elem;
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unsigned int i;
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int rc;
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uint8_t decoded = 0;
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OSMO_ASSERT(scl);
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if (!elem)
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return -EINVAL;
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if (len == 0)
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return -EINVAL;
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memset(scl, 0, sizeof(*scl));
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for (i = 0; i < ARRAY_SIZE(scl->codec); i++) {
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if (len <= 0)
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break;
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rc = gsm0808_dec_speech_codec(&scl->codec[i], elem, len);
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if (rc < 1)
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return -EINVAL;
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elem+=rc;
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len -= rc;
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decoded++;
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}
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scl->len = decoded;
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/* Empty list */
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if (decoded < 1) {
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return -EINVAL;
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}
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return (int)(elem - old_elem);
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}
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/*! Encode TS 08.08 Channel Type IE
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* \param[out] msg Message Buffer to which IE is to be appended
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* \param[in] ct Channel Type to be encoded
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* \returns number of bytes added to \a msg */
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uint8_t gsm0808_enc_channel_type(struct msgb *msg,
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const struct gsm0808_channel_type *ct)
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{
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/*! See also 3GPP TS 48.008 3.2.2.11 Channel Type */
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unsigned int i;
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uint8_t byte;
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uint8_t *old_tail;
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uint8_t *tlv_len;
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OSMO_ASSERT(msg);
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OSMO_ASSERT(ct);
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OSMO_ASSERT(ct->perm_spch_len <= CHANNEL_TYPE_ELEMENT_MAXLEN - 2);
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/* FIXME: Implement encoding support for Data
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* and Speech + CTM Text Telephony */
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if ((ct->ch_indctr & 0x0f) != GSM0808_CHAN_SPEECH
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&& (ct->ch_indctr & 0x0f) != GSM0808_CHAN_SIGN)
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OSMO_ASSERT(false);
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msgb_put_u8(msg, GSM0808_IE_CHANNEL_TYPE);
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tlv_len = msgb_put(msg, 1);
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old_tail = msg->tail;
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msgb_put_u8(msg, ct->ch_indctr & 0x0f);
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msgb_put_u8(msg, ct->ch_rate_type);
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for (i = 0; i < ct->perm_spch_len; i++) {
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byte = ct->perm_spch[i];
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if (i < ct->perm_spch_len - 1)
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byte |= 0x80;
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msgb_put_u8(msg, byte);
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}
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*tlv_len = (uint8_t) (msg->tail - old_tail);
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return *tlv_len + 2;
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}
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/*! Decode TS 08.08 Channel Type IE
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* \param[out] ct Caller-provided memory to store channel type
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* \param[in] elem IE Value to be decoded
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* \param[in] len Length of \a elem in bytes
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* \returns number of bytes parsed; negative on error */
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int gsm0808_dec_channel_type(struct gsm0808_channel_type *ct,
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const uint8_t *elem, uint8_t len)
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{
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/*! See also 3GPP TS 48.008 3.2.2.11 Channel Type */
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unsigned int i;
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uint8_t byte;
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const uint8_t *old_elem = elem;
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OSMO_ASSERT(ct);
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if (!elem)
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return -EINVAL;
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if (len < 3 || len > 11)
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return -EINVAL;
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memset(ct, 0, sizeof(*ct));
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ct->ch_indctr = (*elem) & 0x0f;
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elem++;
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ct->ch_rate_type = (*elem) & 0x0f;
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elem++;
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for (i = 0; i < ARRAY_SIZE(ct->perm_spch); i++) {
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byte = *elem;
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elem++;
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ct->perm_spch[i] = byte & 0x7f;
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if ((byte & 0x80) == 0x00)
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break;
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}
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ct->perm_spch_len = i + 1;
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return (int)(elem - old_elem);
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}
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/*! Encode TS 08.08 Encryption Information IE
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* \param[out] msg Message Buffer to which IE is to be appended
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* \param[in] ei Encryption Information to be encoded
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* \returns number of bytes appended to \a msg */
|
|
uint8_t gsm0808_enc_encrypt_info(struct msgb *msg,
|
|
const struct gsm0808_encrypt_info *ei)
|
|
{
|
|
unsigned int i;
|
|
uint8_t perm_algo = 0;
|
|
uint8_t *ptr;
|
|
uint8_t *old_tail;
|
|
uint8_t *tlv_len;
|
|
|
|
OSMO_ASSERT(msg);
|
|
OSMO_ASSERT(ei);
|
|
OSMO_ASSERT(ei->key_len <= ARRAY_SIZE(ei->key));
|
|
OSMO_ASSERT(ei->perm_algo_len <= ENCRY_INFO_PERM_ALGO_MAXLEN);
|
|
|
|
msgb_put_u8(msg, GSM0808_IE_ENCRYPTION_INFORMATION);
|
|
tlv_len = msgb_put(msg, 1);
|
|
old_tail = msg->tail;
|
|
|
|
for (i = 0; i < ei->perm_algo_len; i++) {
|
|
/* Note: gsm_08_08.h defines the permitted algorithms
|
|
* as an enum which ranges from 0x01 to 0x08 */
|
|
OSMO_ASSERT(ei->perm_algo[i] != 0);
|
|
OSMO_ASSERT(ei->perm_algo[i] <= ENCRY_INFO_PERM_ALGO_MAXLEN);
|
|
perm_algo |= (1 << (ei->perm_algo[i] - 1));
|
|
}
|
|
|
|
msgb_put_u8(msg, perm_algo);
|
|
ptr = msgb_put(msg, ei->key_len);
|
|
memcpy(ptr, ei->key, ei->key_len);
|
|
|
|
*tlv_len = (uint8_t) (msg->tail - old_tail);
|
|
return *tlv_len + 2;
|
|
}
|
|
|
|
/*! Decode TS 08.08 Encryption Information IE
|
|
* \param[out] ei Caller-provided memory to store encryption information
|
|
* \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_encrypt_info(struct gsm0808_encrypt_info *ei,
|
|
const uint8_t *elem, uint8_t len)
|
|
{
|
|
uint8_t perm_algo;
|
|
unsigned int i;
|
|
unsigned int perm_algo_len = 0;
|
|
const uint8_t *old_elem = elem;
|
|
|
|
OSMO_ASSERT(ei);
|
|
if (!elem)
|
|
return -EINVAL;
|
|
if (len == 0)
|
|
return -EINVAL;
|
|
|
|
memset(ei, 0, sizeof(*ei));
|
|
|
|
perm_algo = *elem;
|
|
elem++;
|
|
|
|
for (i = 0; i < ENCRY_INFO_PERM_ALGO_MAXLEN; i++) {
|
|
if (perm_algo & (1 << i)) {
|
|
ei->perm_algo[perm_algo_len] = i + 1;
|
|
perm_algo_len++;
|
|
}
|
|
}
|
|
ei->perm_algo_len = perm_algo_len;
|
|
|
|
ei->key_len = len - 1;
|
|
memcpy(ei->key, elem, ei->key_len);
|
|
elem+=ei->key_len;
|
|
|
|
return (int)(elem - old_elem);
|
|
}
|
|
|
|
/*! Encode TS 08.08 Cell Identifier List IE
|
|
* \param[out] msg Message Buffer to which IE is to be appended
|
|
* \param[in] cil Cell ID List to be encoded
|
|
* \returns number of bytes appended to \a msg */
|
|
uint8_t gsm0808_enc_cell_id_list2(struct msgb *msg,
|
|
const struct gsm0808_cell_id_list2 *cil)
|
|
{
|
|
uint8_t *old_tail;
|
|
uint8_t *tlv_len;
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(msg);
|
|
OSMO_ASSERT(cil);
|
|
|
|
msgb_put_u8(msg, GSM0808_IE_CELL_IDENTIFIER_LIST);
|
|
tlv_len = msgb_put(msg, 1);
|
|
old_tail = msg->tail;
|
|
|
|
msgb_put_u8(msg, cil->id_discr & 0x0f);
|
|
|
|
OSMO_ASSERT(cil->id_list_len <= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
switch (cil->id_discr) {
|
|
case CELL_IDENT_WHOLE_GLOBAL:
|
|
for (i = 0; i < cil->id_list_len; i++) {
|
|
const struct osmo_cell_global_id *id = &cil->id_list[i].global;
|
|
struct gsm48_loc_area_id lai;
|
|
gsm48_generate_lai2(&lai, &id->lai);
|
|
memcpy(msgb_put(msg, sizeof(lai)), &lai, sizeof(lai));
|
|
msgb_put_u16(msg, id->cell_identity);
|
|
}
|
|
break;
|
|
case CELL_IDENT_LAC_AND_CI:
|
|
for (i = 0; i < cil->id_list_len; i++) {
|
|
const struct osmo_lac_and_ci_id *id = &cil->id_list[i].lac_and_ci;
|
|
msgb_put_u16(msg, id->lac);
|
|
msgb_put_u16(msg, id->ci);
|
|
}
|
|
break;
|
|
case CELL_IDENT_CI:
|
|
for (i = 0; i < cil->id_list_len; i++)
|
|
msgb_put_u16(msg, cil->id_list[i].ci);
|
|
break;
|
|
case CELL_IDENT_LAI_AND_LAC:
|
|
for (i = 0; i < cil->id_list_len; i++) {
|
|
const struct osmo_location_area_id *id = &cil->id_list[i].lai_and_lac;
|
|
struct gsm48_loc_area_id lai;
|
|
gsm48_generate_lai2(&lai, id);
|
|
memcpy(msgb_put(msg, sizeof(lai)), &lai, sizeof(lai));
|
|
}
|
|
break;
|
|
case CELL_IDENT_LAC:
|
|
for (i = 0; i < cil->id_list_len; i++)
|
|
msgb_put_u16(msg, cil->id_list[i].lac);
|
|
break;
|
|
case CELL_IDENT_BSS:
|
|
case CELL_IDENT_NO_CELL:
|
|
/* Does not have any list items */
|
|
break;
|
|
default:
|
|
/* Support for other identifier list types is not implemented. */
|
|
OSMO_ASSERT(false);
|
|
}
|
|
|
|
*tlv_len = (uint8_t) (msg->tail - old_tail);
|
|
return *tlv_len + 2;
|
|
}
|
|
|
|
/*! DEPRECATED: Use gsm0808_enc_cell_id_list2 instead.
|
|
*
|
|
* Encode TS 08.08 Cell Identifier List IE
|
|
* \param[out] msg Message Buffer to which IE is to be appended
|
|
* \param[in] cil Cell ID List to be encoded
|
|
* \returns number of bytes appended to \a msg */
|
|
uint8_t gsm0808_enc_cell_id_list(struct msgb *msg,
|
|
const struct gsm0808_cell_id_list *cil)
|
|
{
|
|
uint8_t *old_tail;
|
|
uint8_t *tlv_len;
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(msg);
|
|
OSMO_ASSERT(cil);
|
|
|
|
msgb_put_u8(msg, GSM0808_IE_CELL_IDENTIFIER_LIST);
|
|
tlv_len = msgb_put(msg, 1);
|
|
old_tail = msg->tail;
|
|
|
|
msgb_put_u8(msg, cil->id_discr & 0x0f);
|
|
|
|
switch (cil->id_discr) {
|
|
case CELL_IDENT_LAC:
|
|
OSMO_ASSERT(cil->id_list_len <= CELL_ID_LIST_LAC_MAXLEN)
|
|
for (i=0;i<cil->id_list_len;i++) {
|
|
msgb_put_u16(msg, cil->id_list_lac[i]);
|
|
}
|
|
break;
|
|
case CELL_IDENT_BSS:
|
|
/* Does not have any list items */
|
|
break;
|
|
default:
|
|
/* FIXME: Implement support for all identifier list elements */
|
|
OSMO_ASSERT(false);
|
|
}
|
|
|
|
*tlv_len = (uint8_t) (msg->tail - old_tail);
|
|
return *tlv_len + 2;
|
|
}
|
|
|
|
/* Decode 5-byte LAI list element data (see TS 08.08 3.2.2.27) into MCC/MNC/LAC. */
|
|
static void decode_lai(const uint8_t *data, struct osmo_location_area_id *decoded)
|
|
{
|
|
struct gsm48_loc_area_id lai;
|
|
|
|
/* Copy data to stack to prevent unaligned access in gsm48_decode_lai2(). */
|
|
memcpy(&lai, data, sizeof(lai)); /* don't byte swap yet */
|
|
|
|
gsm48_decode_lai2(&lai, decoded);
|
|
}
|
|
|
|
static int parse_cell_id_global_list(struct gsm0808_cell_id_list2 *cil, const uint8_t *data, size_t remain,
|
|
size_t *consumed)
|
|
{
|
|
struct osmo_cell_global_id *id;
|
|
uint16_t *ci_be;
|
|
size_t lai_offset;
|
|
int i = 0;
|
|
const size_t elemlen = sizeof(struct gsm48_loc_area_id) + sizeof(*ci_be);
|
|
|
|
*consumed = 0;
|
|
while (remain >= elemlen) {
|
|
if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
return -ENOSPC;
|
|
id = &cil->id_list[i].global;
|
|
lai_offset = i * elemlen;
|
|
decode_lai(&data[lai_offset], &id->lai);
|
|
ci_be = (uint16_t *)(&data[lai_offset + sizeof(struct gsm48_loc_area_id)]);
|
|
id->cell_identity = osmo_load16be(ci_be);
|
|
*consumed += elemlen;
|
|
remain -= elemlen;
|
|
i++;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int parse_cell_id_lac_and_ci_list(struct gsm0808_cell_id_list2 *cil, const uint8_t *data, size_t remain,
|
|
size_t *consumed)
|
|
{
|
|
uint16_t *lacp_be, *ci_be;
|
|
struct osmo_lac_and_ci_id *id;
|
|
int i = 0, j = 0;
|
|
const size_t elemlen = sizeof(*lacp_be) + sizeof(*ci_be);
|
|
|
|
*consumed = 0;
|
|
|
|
if (remain < elemlen)
|
|
return -EINVAL;
|
|
|
|
lacp_be = (uint16_t *)(&data[j]);
|
|
ci_be = (uint16_t *)(&data[j + elemlen/2]);
|
|
while (remain >= elemlen) {
|
|
if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
return -ENOSPC;
|
|
id = &cil->id_list[i++].lac_and_ci;
|
|
id->lac = osmo_load16be(lacp_be);
|
|
id->ci = osmo_load16be(ci_be);
|
|
*consumed += elemlen;
|
|
remain -= elemlen;
|
|
j += elemlen;
|
|
lacp_be = (uint16_t *)(&data[j]);
|
|
ci_be = (uint16_t *)(&data[j + elemlen/2]);
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int parse_cell_id_ci_list(struct gsm0808_cell_id_list2 *cil, const uint8_t *data, size_t remain,
|
|
size_t *consumed)
|
|
{
|
|
const uint16_t *ci_be = (const uint16_t *)data;
|
|
int i = 0;
|
|
const size_t elemlen = sizeof(*ci_be);
|
|
|
|
*consumed = 0;
|
|
while (remain >= elemlen) {
|
|
if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
return -ENOSPC;
|
|
cil->id_list[i++].ci = osmo_load16be(ci_be++);
|
|
*consumed += elemlen;
|
|
remain -= elemlen;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static int parse_cell_id_lai_and_lac(struct gsm0808_cell_id_list2 *cil, const uint8_t *data, size_t remain,
|
|
size_t *consumed)
|
|
{
|
|
struct osmo_location_area_id *id;
|
|
int i = 0;
|
|
const size_t elemlen = sizeof(struct gsm48_loc_area_id);
|
|
|
|
*consumed = 0;
|
|
while (remain >= elemlen) {
|
|
if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
return -ENOSPC;
|
|
id = &cil->id_list[i].lai_and_lac;
|
|
decode_lai(&data[i * elemlen], id);
|
|
*consumed += elemlen;
|
|
remain -= elemlen;
|
|
i++;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int parse_cell_id_lac_list(struct gsm0808_cell_id_list2 *cil, const uint8_t *data, size_t remain, size_t *consumed)
|
|
{
|
|
const uint16_t *lac_be = (const uint16_t *)data;
|
|
int i = 0;
|
|
const size_t elemlen = sizeof(*lac_be);
|
|
|
|
*consumed = 0;
|
|
while (remain >= elemlen) {
|
|
if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
|
|
return -ENOSPC;
|
|
cil->id_list[i++].lac = osmo_load16be(lac_be++);
|
|
*consumed += elemlen;
|
|
remain -= elemlen;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/*! Decode Cell Identifier List IE
|
|
* \param[out] cil Caller-provided memory to store Cell ID list
|
|
* \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_cell_id_list2(struct gsm0808_cell_id_list2 *cil,
|
|
const uint8_t *elem, uint8_t len)
|
|
{
|
|
uint8_t id_discr;
|
|
size_t bytes_elem = 0;
|
|
int list_len = 0;
|
|
|
|
OSMO_ASSERT(cil);
|
|
if (!elem)
|
|
return -EINVAL;
|
|
if (len == 0)
|
|
return -EINVAL;
|
|
|
|
memset(cil, 0, sizeof(*cil));
|
|
|
|
id_discr = *elem & 0x0f;
|
|
elem++;
|
|
len--;
|
|
|
|
switch (id_discr) {
|
|
case CELL_IDENT_WHOLE_GLOBAL:
|
|
list_len = parse_cell_id_global_list(cil, elem, len, &bytes_elem);
|
|
break;
|
|
case CELL_IDENT_LAC_AND_CI:
|
|
list_len = parse_cell_id_lac_and_ci_list(cil, elem, len, &bytes_elem);
|
|
break;
|
|
case CELL_IDENT_CI:
|
|
list_len = parse_cell_id_ci_list(cil, elem, len, &bytes_elem);
|
|
break;
|
|
case CELL_IDENT_LAI_AND_LAC:
|
|
list_len = parse_cell_id_lai_and_lac(cil, elem, len, &bytes_elem);
|
|
break;
|
|
case CELL_IDENT_LAC:
|
|
list_len = parse_cell_id_lac_list(cil, elem, len, &bytes_elem);
|
|
break;
|
|
case CELL_IDENT_BSS:
|
|
case CELL_IDENT_NO_CELL:
|
|
/* Does not have any list items */
|
|
break;
|
|
default:
|
|
/* Remaining cell identification types are not implemented. */
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (list_len < 0) /* parsing error */
|
|
return list_len;
|
|
|
|
cil->id_discr = id_discr;
|
|
cil->id_list_len = list_len;
|
|
|
|
/* One byte for the cell ID discriminator + any remaining bytes in
|
|
* the IE which were consumed by the parser functions above. */
|
|
return 1 + (int)bytes_elem;
|
|
}
|
|
|
|
/*! DEPRECATED: Use gsm0808_dec_cell_id_list2 instead.
|
|
*
|
|
* Decode Cell Identifier List IE
|
|
* \param[out] cil Caller-provided memory to store Cell ID list
|
|
* \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_cell_id_list(struct gsm0808_cell_id_list *cil,
|
|
const uint8_t *elem, uint8_t len)
|
|
{
|
|
uint8_t id_discr;
|
|
const uint8_t *old_elem = elem;
|
|
unsigned int item_count = 0;
|
|
|
|
OSMO_ASSERT(cil);
|
|
if (!elem)
|
|
return -EINVAL;
|
|
if (len == 0)
|
|
return -EINVAL;
|
|
|
|
memset(cil, 0, sizeof(*cil));
|
|
|
|
id_discr = *elem & 0x0f;
|
|
elem++;
|
|
len--;
|
|
|
|
cil->id_discr = id_discr;
|
|
|
|
switch (id_discr) {
|
|
case CELL_IDENT_LAC:
|
|
while (len >= 2) {
|
|
cil->id_list_lac[item_count] = osmo_load16be(elem);
|
|
elem += 2;
|
|
item_count++;
|
|
len -= 2;
|
|
}
|
|
case CELL_IDENT_BSS:
|
|
/* Does not have any list items */
|
|
break;
|
|
default:
|
|
/* FIXME: Implement support for all identifier list elements */
|
|
return -EINVAL;
|
|
}
|
|
|
|
cil->id_list_len = item_count;
|
|
return (int)(elem - old_elem);
|
|
}
|
|
|
|
static bool same_cell_id_list_entries(const struct gsm0808_cell_id_list2 *a, int ai,
|
|
const struct gsm0808_cell_id_list2 *b, int bi)
|
|
{
|
|
struct gsm0808_cell_id_list2 tmp = {
|
|
.id_discr = a->id_discr,
|
|
.id_list_len = 1,
|
|
};
|
|
uint8_t buf_a[32 + sizeof(struct msgb)];
|
|
uint8_t buf_b[32 + sizeof(struct msgb)];
|
|
struct msgb *msg_a = (void*)buf_a;
|
|
struct msgb *msg_b = (void*)buf_b;
|
|
|
|
msg_a->data_len = 32;
|
|
msg_b->data_len = 32;
|
|
msgb_reset(msg_a);
|
|
msgb_reset(msg_b);
|
|
|
|
if (a->id_discr != b->id_discr)
|
|
return false;
|
|
if (ai >= a->id_list_len
|
|
|| bi >= b->id_list_len)
|
|
return false;
|
|
|
|
tmp.id_list[0] = a->id_list[ai];
|
|
gsm0808_enc_cell_id_list2(msg_a, &tmp);
|
|
|
|
tmp.id_list[0] = b->id_list[bi];
|
|
gsm0808_enc_cell_id_list2(msg_b, &tmp);
|
|
|
|
if (msg_a->len != msg_b->len)
|
|
return false;
|
|
if (memcmp(msg_a->data, msg_b->data, msg_a->len))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*! Append entries from one Cell Identifier List to another.
|
|
* The cell identifier types must be identical between the two lists.
|
|
* \param dst[out] Append entries to this list.
|
|
* \param src[in] Append these entries to \a dst.
|
|
* \returns the nr of items added, or negative on error: -EINVAL if the id_discr mismatch
|
|
* between the lists, -ENOSPC if the destination list does not have enough space. If an error is
|
|
* returned, \a dst may have already been changed (particularly on -ENOSPC). Note that a return value
|
|
* of zero may occur when the src->id_list_len is zero, or when all entries from \a src already exist
|
|
* in \a dst, and does not indicate error per se. */
|
|
int gsm0808_cell_id_list_add(struct gsm0808_cell_id_list2 *dst, const struct gsm0808_cell_id_list2 *src)
|
|
{
|
|
int i, j;
|
|
int added = 0;
|
|
|
|
if (dst->id_list_len == 0
|
|
&& dst->id_discr != CELL_IDENT_BSS)
|
|
dst->id_discr = src->id_discr;
|
|
else if (dst->id_discr != src->id_discr)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < src->id_list_len; i++) {
|
|
/* don't add duplicate entries */
|
|
bool skip = false;
|
|
for (j = 0; j < dst->id_list_len; j++) {
|
|
if (same_cell_id_list_entries(dst, j, src, i)) {
|
|
skip = true;
|
|
break;
|
|
}
|
|
}
|
|
if (skip)
|
|
continue;
|
|
|
|
if (dst->id_list_len >= ARRAY_SIZE(dst->id_list))
|
|
return -ENOSPC;
|
|
|
|
dst->id_list[dst->id_list_len++] = src->id_list[i];
|
|
added ++;
|
|
}
|
|
|
|
return added;
|
|
}
|
|
|
|
/*! Convert a single Cell Identifier to a Cell Identifier List with one entry.
|
|
* \param dst[out] Overwrite this list.
|
|
* \param src[in] Set \a dst to contain exactly this item.
|
|
*/
|
|
void gsm0808_cell_id_to_list(struct gsm0808_cell_id_list2 *dst, const struct gsm0808_cell_id *src)
|
|
{
|
|
if (!dst)
|
|
return;
|
|
if (!src) {
|
|
*dst = (struct gsm0808_cell_id_list2){
|
|
.id_discr = CELL_IDENT_NO_CELL,
|
|
};
|
|
return;
|
|
}
|
|
|
|
*dst = (struct gsm0808_cell_id_list2){
|
|
.id_discr = src->id_discr,
|
|
.id_list = { src->id },
|
|
.id_list_len = 1,
|
|
};
|
|
|
|
switch (src->id_discr) {
|
|
case CELL_IDENT_NO_CELL:
|
|
case CELL_IDENT_BSS:
|
|
dst->id_list_len = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*! Encode Cell Identifier IE (3GPP TS 48.008 3.2.2.17).
|
|
* \param[out] msg Message Buffer to which IE is to be appended
|
|
* \param[in] ci Cell ID to be encoded
|
|
* \returns number of bytes appended to \a msg */
|
|
uint8_t gsm0808_enc_cell_id(struct msgb *msg, const struct gsm0808_cell_id *ci)
|
|
{
|
|
uint8_t rc;
|
|
uint8_t *ie_tag;
|
|
struct gsm0808_cell_id_list2 cil = {
|
|
.id_discr = ci->id_discr,
|
|
.id_list = { ci->id },
|
|
.id_list_len = 1,
|
|
};
|
|
|
|
OSMO_ASSERT(msg);
|
|
OSMO_ASSERT(ci);
|
|
|
|
ie_tag = msg->tail;
|
|
rc = gsm0808_enc_cell_id_list2(msg, &cil);
|
|
|
|
if (rc <= 0)
|
|
return rc;
|
|
|
|
*ie_tag = GSM0808_IE_CELL_IDENTIFIER;
|
|
return rc;
|
|
}
|
|
|
|
/*! Decode Cell Identifier IE (3GPP TS 48.008 3.2.2.17).
|
|
* \param[out] ci Caller-provided memory to store Cell ID.
|
|
* \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_cell_id(struct gsm0808_cell_id *ci, const uint8_t *elem, uint8_t len)
|
|
{
|
|
struct gsm0808_cell_id_list2 cil;
|
|
int rc;
|
|
rc = gsm0808_dec_cell_id_list2(&cil, elem, len);
|
|
if (rc < 0)
|
|
return rc;
|
|
if (cil.id_discr == CELL_IDENT_BSS || cil.id_discr == CELL_IDENT_NO_CELL) {
|
|
if (cil.id_list_len != 0)
|
|
return -EINVAL;
|
|
} else {
|
|
if (cil.id_list_len != 1)
|
|
return -EINVAL;
|
|
}
|
|
ci->id_discr = cil.id_discr;
|
|
ci->id = cil.id_list[0];
|
|
return rc;
|
|
}
|
|
|
|
/*! Convert the representation of the permitted speech codec identifier
|
|
* that is used in struct gsm0808_channel_type to the speech codec
|
|
* representation we use in struct gsm0808_speech_codec.
|
|
* \param[in] perm_spch to be converted (see also gsm0808_permitted_speech)
|
|
* \returns GSM speech codec type; negative on error */
|
|
int gsm0808_chan_type_to_speech_codec(uint8_t perm_spch)
|
|
{
|
|
/*! The speech codec type, which is used in the channel type field to
|
|
* signal the permitted speech versions (codecs) has a different
|
|
* encoding than the type field in the speech codec type element
|
|
* (See also 3GPP TS 48.008, 3.2.2.11 and 3.2.2.103) */
|
|
|
|
switch (perm_spch) {
|
|
case GSM0808_PERM_FR1:
|
|
return GSM0808_SCT_FR1;
|
|
case GSM0808_PERM_FR2:
|
|
return GSM0808_SCT_FR2;
|
|
case GSM0808_PERM_FR3:
|
|
return GSM0808_SCT_FR3;
|
|
case GSM0808_PERM_FR4:
|
|
return GSM0808_SCT_FR4;
|
|
case GSM0808_PERM_FR5:
|
|
return GSM0808_SCT_FR5;
|
|
case GSM0808_PERM_HR1:
|
|
return GSM0808_SCT_HR1;
|
|
case GSM0808_PERM_HR3:
|
|
return GSM0808_SCT_HR3;
|
|
case GSM0808_PERM_HR4:
|
|
return GSM0808_SCT_HR4;
|
|
case GSM0808_PERM_HR6:
|
|
return GSM0808_SCT_HR6;
|
|
}
|
|
|
|
/* Invalid input */
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*! Extrapolate a speech codec field from a given permitted speech
|
|
* parameter (channel type).
|
|
* \param[out] sc Caller provided memory to store the resulting speech codec
|
|
* \param[in] perm_spch value that is used to derive the speech codec info
|
|
* (see also: enum gsm0808_speech_codec_type in gsm0808_utils.h)
|
|
* \returns zero when successful; negative on error */
|
|
int gsm0808_speech_codec_from_chan_type(struct gsm0808_speech_codec *sc,
|
|
uint8_t perm_spch)
|
|
{
|
|
int rc;
|
|
|
|
memset(sc, 0, sizeof(*sc));
|
|
|
|
/* Determine codec type */
|
|
rc = gsm0808_chan_type_to_speech_codec(perm_spch);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
sc->type = (uint8_t) rc;
|
|
|
|
/* Depending on the speech codec type, pick a default codec
|
|
* configuration that exactly matches the configuration on the
|
|
* air interface. */
|
|
switch (sc->type) {
|
|
case GSM0808_SCT_FR3:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR;
|
|
break;
|
|
case GSM0808_SCT_FR4:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB;
|
|
break;
|
|
case GSM0808_SCT_FR5:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR_WB;
|
|
break;
|
|
case GSM0808_SCT_HR3:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_HR_AMR;
|
|
break;
|
|
case GSM0808_SCT_HR4:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB;
|
|
break;
|
|
case GSM0808_SCT_HR6:
|
|
sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR;
|
|
break;
|
|
default:
|
|
/* Note: Not all codec types specify a default setting,
|
|
* in this case, we just set the field to zero. */
|
|
sc->cfg = 0;
|
|
}
|
|
|
|
/* Tag all codecs as "Full IP"
|
|
* (see als 3GPP TS 48.008 3.2.2.103) */
|
|
sc->fi = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! Determine a set of AMR speech codec configuration bits (S0-S15) from a
|
|
* given GSM 04.08 AMR configuration struct.
|
|
* \param[in] cfg AMR configuration in GSM 04.08 format.
|
|
* \param[in] hint if the resulting configuration shall be used with a FR or HR TCH.
|
|
* \returns configuration bits (S0-S15) */
|
|
uint16_t gsm0808_sc_cfg_from_gsm48_mr_cfg(const struct gsm48_multi_rate_conf *cfg,
|
|
bool fr)
|
|
{
|
|
uint16_t s15_s0 = 0;
|
|
|
|
/* Check each rate bit in the AMR multirate configuration and pick the
|
|
* matching default configuration as specified in 3GPP TS 28.062,
|
|
* Table 7.11.3.1.3-2. */
|
|
if (cfg->m4_75)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_4_75;
|
|
if (cfg->m5_15)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_5_15;
|
|
if (cfg->m5_90)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_5_90;
|
|
if (cfg->m6_70)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_6_70;
|
|
if (cfg->m7_40)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_7_40;
|
|
if (cfg->m7_95)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_7_95;
|
|
if (cfg->m10_2)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_10_2;
|
|
if (cfg->m12_2)
|
|
s15_s0 |= GSM0808_SC_CFG_DEFAULT_AMR_12_2;
|
|
|
|
/* Note: 3GPP TS 48.008, chapter 3GPP TS 48.008 states that for AMR
|
|
* some of the configuration bits must be coded as zeros. The applied
|
|
* bitmask matches the default codec settings. See also the definition
|
|
* of enum gsm0808_speech_codec_defaults in gsm_08_08.h and
|
|
* 3GPP TS 28.062, Table 7.11.3.1.3-2. */
|
|
if (fr)
|
|
s15_s0 &= GSM0808_SC_CFG_DEFAULT_FR_AMR;
|
|
else
|
|
s15_s0 &= GSM0808_SC_CFG_DEFAULT_HR_AMR;
|
|
|
|
return s15_s0;
|
|
}
|
|
|
|
/*! Print a human readable name of the cell identifier to the char buffer.
|
|
* This is useful both for struct gsm0808_cell_id and struct gsm0808_cell_id_list2.
|
|
* See also gsm0808_cell_id_name() and gsm0808_cell_id_list_name().
|
|
* \param[out] buf Destination buffer to write string representation to.
|
|
* \param[in] buflen Amount of memory available in \a buf.
|
|
* \param[in] id_discr Cell Identifier type.
|
|
* \param[in] u Cell Identifer value.
|
|
* \returns Like snprintf(): the amount of characters (excluding terminating nul) written,
|
|
* or that would have been written if the buffer were large enough.
|
|
*/
|
|
int gsm0808_cell_id_u_name(char *buf, size_t buflen,
|
|
enum CELL_IDENT id_discr, const union gsm0808_cell_id_u *u)
|
|
{
|
|
switch (id_discr) {
|
|
case CELL_IDENT_LAC:
|
|
return snprintf(buf, buflen, "%u", u->lac);
|
|
case CELL_IDENT_CI:
|
|
return snprintf(buf, buflen, "%u", u->ci);
|
|
case CELL_IDENT_LAC_AND_CI:
|
|
return snprintf(buf, buflen, "%u-%u", u->lac_and_ci.lac, u->lac_and_ci.ci);
|
|
case CELL_IDENT_LAI_AND_LAC:
|
|
return snprintf(buf, buflen, "%s", osmo_lai_name(&u->lai_and_lac));
|
|
case CELL_IDENT_WHOLE_GLOBAL:
|
|
return snprintf(buf, buflen, "%s", osmo_cgi_name(&u->global));
|
|
default:
|
|
/* For CELL_IDENT_BSS and CELL_IDENT_NO_CELL, just print the discriminator.
|
|
* Same for kinds we have no string representation of yet. */
|
|
return snprintf(buf, buflen, "%s", gsm0808_cell_id_discr_name(id_discr));
|
|
}
|
|
}
|
|
|
|
/*! value_string[] for enum CELL_IDENT. */
|
|
const struct value_string gsm0808_cell_id_discr_names[] = {
|
|
{ CELL_IDENT_WHOLE_GLOBAL, "CGI" },
|
|
{ CELL_IDENT_LAC_AND_CI, "LAC-CI" },
|
|
{ CELL_IDENT_CI, "CI" },
|
|
{ CELL_IDENT_NO_CELL, "NO-CELL" },
|
|
{ CELL_IDENT_LAI_AND_LAC, "LAI" },
|
|
{ CELL_IDENT_LAC, "LAC" },
|
|
{ CELL_IDENT_BSS, "BSS" },
|
|
{ CELL_IDENT_UTRAN_PLMN_LAC_RNC, "UTRAN-PLMN-LAC-RNC" },
|
|
{ CELL_IDENT_UTRAN_RNC, "UTRAN-RNC" },
|
|
{ CELL_IDENT_UTRAN_LAC_RNC, "UTRAN-LAC-RNC" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define APPEND_THING(func, args...) do { \
|
|
int remain = buflen - (pos - buf); \
|
|
int l = func(pos, remain, ##args); \
|
|
if (l < 0 || l > remain) \
|
|
pos = buf + buflen; \
|
|
else \
|
|
pos += l; \
|
|
if (l > 0) \
|
|
total_len += l; \
|
|
} while(0)
|
|
#define APPEND_STR(fmt, args...) APPEND_THING(snprintf, fmt, ##args)
|
|
#define APPEND_CELL_ID_U(DISCR, U) APPEND_THING(gsm0808_cell_id_u_name, DISCR, U)
|
|
|
|
static const char *gsm0808_cell_id_name_buf(const struct gsm0808_cell_id *cid,
|
|
char *buf, size_t buflen)
|
|
{
|
|
char *pos = buf;
|
|
int total_len = 0;
|
|
APPEND_STR("%s:", gsm0808_cell_id_discr_name(cid->id_discr));
|
|
APPEND_CELL_ID_U(cid->id_discr, &cid->id);
|
|
return buf;
|
|
}
|
|
|
|
/*! Return a human readable representation of a Cell Identifier, like "LAC:123"
|
|
* or "CGI:001-01-42-23".
|
|
* \param[in] cid Cell Identifer.
|
|
* \returns String in a static buffer.
|
|
*/
|
|
const char *gsm0808_cell_id_name(const struct gsm0808_cell_id *cid)
|
|
{
|
|
static char buf[64];
|
|
return gsm0808_cell_id_name_buf(cid, buf, sizeof(buf));
|
|
}
|
|
|
|
/*! Like gsm0808_cell_id_name() but uses a different static buffer.
|
|
* \param[in] cid Cell Identifer.
|
|
* \returns String in a static buffer.
|
|
*/
|
|
const char *gsm0808_cell_id_name2(const struct gsm0808_cell_id *cid)
|
|
{
|
|
static char buf[64];
|
|
return gsm0808_cell_id_name_buf(cid, buf, sizeof(buf));
|
|
}
|
|
|
|
/*! Return a human readable representation of the Cell Identifier List, like
|
|
* "LAC[2]:{123, 456}".
|
|
* The return value semantics are like snprintf() and thus allow ensuring a complete
|
|
* untruncated string by determining the required string length from the return value.
|
|
* If buflen > 0, always nul-terminate the string in buf, also when it is truncated.
|
|
* If buflen == 0, do not modify buf, just return the would-be length.
|
|
* \param[out] buf Destination buffer to write string representation to.
|
|
* \param[in] buflen Amount of memory available in \a buf.
|
|
* \param[in] cil Cell Identifer List.
|
|
* \returns Like snprintf(): the amount of characters (excluding terminating nul) written,
|
|
* or that would have been written if the buffer were large enough.
|
|
*/
|
|
int gsm0808_cell_id_list_name_buf(char *buf, size_t buflen, const struct gsm0808_cell_id_list2 *cil)
|
|
{
|
|
char *pos = buf;
|
|
int total_len = 0;
|
|
int i;
|
|
|
|
APPEND_STR("%s[%u]", gsm0808_cell_id_discr_name(cil->id_discr), cil->id_list_len);
|
|
|
|
switch (cil->id_discr) {
|
|
case CELL_IDENT_BSS:
|
|
case CELL_IDENT_NO_CELL:
|
|
return total_len;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
APPEND_STR(":{");
|
|
|
|
for (i = 0; i < cil->id_list_len; i++) {
|
|
if (i)
|
|
APPEND_STR(", ");
|
|
APPEND_CELL_ID_U(cil->id_discr, &cil->id_list[i]);
|
|
}
|
|
|
|
APPEND_STR("}");
|
|
return total_len;
|
|
}
|
|
|
|
/*! Return a human-readable representation of \a cil in a static buffer.
|
|
* If the list is too long, the output may be truncated.
|
|
* See also gsm0808_cell_id_list_name_buf(). */
|
|
const char *gsm0808_cell_id_list_name(const struct gsm0808_cell_id_list2 *cil)
|
|
{
|
|
static char buf[1024];
|
|
gsm0808_cell_id_list_name_buf(buf, sizeof(buf), cil);
|
|
return buf;
|
|
}
|
|
|
|
#undef APPEND_STR
|
|
#undef APPEND_CELL_ID_U
|
|
|
|
const char *gsm0808_channel_type_name(const struct gsm0808_channel_type *ct)
|
|
{
|
|
static char buf[128];
|
|
snprintf(buf, sizeof(buf), "ch_indctr=0x%x ch_rate_type=0x%x perm_spch=%s",
|
|
ct->ch_indctr, ct->ch_rate_type,
|
|
osmo_hexdump(ct->perm_spch, ct->perm_spch_len));
|
|
return buf;
|
|
}
|
|
|
|
/*! @} */
|