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Makefile
Makefile.in
.deps
.libs
*.o
*.lo
*.la
*.pc
aclocal.m4
acinclude.m4
aminclude.am
m4/*.m4
autom4te.cache
compile
config.h*
config.sub
config.log
config.status
config.guess
configure
depcomp
missing
ltmain.sh
install-sh
stamp-h1
libtool
.tarball-version
.version
.dirstamp
Doxyfile
.*.sw?
src/libdebug/libdebug.a
src/libg711/libg711.a
src/libjitter/libjitter.a
src/liboptions/liboptions.a
src/libosmocc/libosmocc.a
src/libsample/libsample.a
src/libsamplerate/libsamplerate.a
src/libfilter/libfilter.a
src/libtimer/libtimer.a
src/libsound/libsound.a
src/telephone/osmo-cc-alsa-endpoint

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GNU GENERAL PUBLIC LICENSE
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This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

5
Makefile.am Normal file
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@ -0,0 +1,5 @@
AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
ACLOCAL_AMFLAGS = -I m4
SUBDIRS = src

98
configure.ac Normal file
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@ -0,0 +1,98 @@
AC_INIT([osmo-cc-alsa-endpoint],
m4_esyscmd([./git-version-gen .tarball-version]),
[jolly@eversberg.eu])
dnl *This* is the root dir, even if an install-sh exists in ../ or ../../
AC_CONFIG_AUX_DIR([.])
AM_INIT_AUTOMAKE([subdir-objects dist-bzip2])
AC_CONFIG_TESTDIR(tests)
dnl kernel style compile messages
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
dnl include release helper
RELMAKE='-include osmo-release.mk'
AC_SUBST([RELMAKE])
dnl checks for programs
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_CONFIG_MACRO_DIR([m4])
AC_ARG_ENABLE(sanitize,
[AS_HELP_STRING(
[--enable-sanitize],
[Compile with address sanitizer enabled],
)],
[sanitize=$enableval], [sanitize="no"])
if test x"$sanitize" = x"yes"
then
CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
fi
AC_ARG_ENABLE(werror,
[AS_HELP_STRING(
[--enable-werror],
[Turn all compiler warnings into errors, with exceptions:
a) deprecation (allow upstream to mark deprecation without breaking builds);
b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
]
)],
[werror=$enableval], [werror="no"])
if test x"$werror" = x"yes"
then
WERROR_FLAGS="-Werror"
WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
CFLAGS="$CFLAGS $WERROR_FLAGS"
CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
fi
CFLAGS="$CFLAGS -Wall"
CPPFLAGS="$CPPFLAGS -Wall"
dnl checks for header files
AC_HEADER_STDC
AC_CHECK_HEADERS(execinfo.h sys/select.h sys/socket.h syslog.h ctype.h)
# The following test is taken from WebKit's webkit.m4
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fvisibility=hidden "
AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
[ AC_MSG_RESULT([yes])
SYMBOL_VISIBILITY="-fvisibility=hidden"],
AC_MSG_RESULT([no]))
CFLAGS="$saved_CFLAGS"
AC_SUBST(SYMBOL_VISIBILITY)
dnl Generate the output
AM_CONFIG_HEADER(config.h)
AC_CHECK_LIB([m], [main])
AC_CHECK_LIB([pthread], [main])
AC_ARG_WITH([alsa], [AS_HELP_STRING([--with-alsa], [compile with Alsa driver @<:@default=check@:>@]) ], [], [with_alsa="check"])
AS_IF([test "x$with_alsa" != xno], [PKG_CHECK_MODULES(ALSA, alsa >= 1.0, with_alsa=yes, with_alsa=no)])
AM_CONDITIONAL(HAVE_ALSA, test "x$with_alsa" == "xyes" )
AS_IF([test "x$with_alsa" == "xyes"],[AC_MSG_NOTICE( Compiling with Alsa support )], [AC_MSG_NOTICE( Alsa sound card not supported. Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. )])
AC_OUTPUT(
src/liboptions/Makefile
src/libdebug/Makefile
src/libsample/Makefile
src/libsamplerate/Makefile
src/libfilter/Makefile
src/libtimer/Makefile
src/libjitter/Makefile
src/libosmocc/Makefile
src/libg711/Makefile
src/libsound/Makefile
src/telephone/Makefile
src/Makefile
Makefile)

151
git-version-gen Executable file
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@ -0,0 +1,151 @@
#!/bin/sh
# Print a version string.
scriptversion=2010-01-28.01
# Copyright (C) 2007-2010 Free Software Foundation, Inc.
#
# 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 3 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
# It may be run two ways:
# - from a git repository in which the "git describe" command below
# produces useful output (thus requiring at least one signed tag)
# - from a non-git-repo directory containing a .tarball-version file, which
# presumes this script is invoked like "./git-version-gen .tarball-version".
# In order to use intra-version strings in your project, you will need two
# separate generated version string files:
#
# .tarball-version - present only in a distribution tarball, and not in
# a checked-out repository. Created with contents that were learned at
# the last time autoconf was run, and used by git-version-gen. Must not
# be present in either $(srcdir) or $(builddir) for git-version-gen to
# give accurate answers during normal development with a checked out tree,
# but must be present in a tarball when there is no version control system.
# Therefore, it cannot be used in any dependencies. GNUmakefile has
# hooks to force a reconfigure at distribution time to get the value
# correct, without penalizing normal development with extra reconfigures.
#
# .version - present in a checked-out repository and in a distribution
# tarball. Usable in dependencies, particularly for files that don't
# want to depend on config.h but do want to track version changes.
# Delete this file prior to any autoconf run where you want to rebuild
# files to pick up a version string change; and leave it stale to
# minimize rebuild time after unrelated changes to configure sources.
#
# It is probably wise to add these two files to .gitignore, so that you
# don't accidentally commit either generated file.
#
# Use the following line in your configure.ac, so that $(VERSION) will
# automatically be up-to-date each time configure is run (and note that
# since configure.ac no longer includes a version string, Makefile rules
# should not depend on configure.ac for version updates).
#
# AC_INIT([GNU project],
# m4_esyscmd([build-aux/git-version-gen .tarball-version]),
# [bug-project@example])
#
# Then use the following lines in your Makefile.am, so that .version
# will be present for dependencies, and so that .tarball-version will
# exist in distribution tarballs.
#
# BUILT_SOURCES = $(top_srcdir)/.version
# $(top_srcdir)/.version:
# echo $(VERSION) > $@-t && mv $@-t $@
# dist-hook:
# echo $(VERSION) > $(distdir)/.tarball-version
case $# in
1) ;;
*) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
esac
tarball_version_file=$1
nl='
'
# First see if there is a tarball-only version file.
# then try "git describe", then default.
if test -f $tarball_version_file
then
v=`cat $tarball_version_file` || exit 1
case $v in
*$nl*) v= ;; # reject multi-line output
[0-9]*) ;;
*) v= ;;
esac
test -z "$v" \
&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
fi
if test -n "$v"
then
: # use $v
elif
v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
|| git describe --abbrev=4 HEAD 2>/dev/null` \
&& case $v in
[0-9]*) ;;
v[0-9]*) ;;
*) (exit 1) ;;
esac
then
# Is this a new git that lists number of commits since the last
# tag or the previous older version that did not?
# Newer: v6.10-77-g0f8faeb
# Older: v6.10-g0f8faeb
case $v in
*-*-*) : git describe is okay three part flavor ;;
*-*)
: git describe is older two part flavor
# Recreate the number of commits and rewrite such that the
# result is the same as if we were using the newer version
# of git describe.
vtag=`echo "$v" | sed 's/-.*//'`
numcommits=`git rev-list "$vtag"..HEAD | wc -l`
v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
;;
esac
# Change the first '-' to a '.', so version-comparing tools work properly.
# Remove the "g" in git describe's output string, to save a byte.
v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
else
v=UNKNOWN
fi
v=`echo "$v" |sed 's/^v//'`
# Don't declare a version "dirty" merely because a time stamp has changed.
git status > /dev/null 2>&1
dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
case "$dirty" in
'') ;;
*) # Append the suffix only if there isn't one already.
case $v in
*-dirty) ;;
*) v="$v-dirty" ;;
esac ;;
esac
# Omit the trailing newline, so that m4_esyscmd can use the result directly.
echo "$v" | tr -d '\012'
# Local variables:
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-end: "$"
# End:

0
m4/.keep Normal file
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21
src/Makefile.am Normal file
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@ -0,0 +1,21 @@
AUTOMAKE_OPTIONS = foreign
SUBDIRS = \
liboptions \
libdebug \
libsample \
libsamplerate \
libfilter \
libtimer \
libjitter \
libosmocc \
libg711
if HAVE_ALSA
SUBDIRS += \
libsound
endif
SUBDIRS += \
telephone

30
src/telephone/Makefile.am Normal file
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@ -0,0 +1,30 @@
AM_CPPFLAGS = -Wall -Wextra -g $(all_includes)
bin_PROGRAMS = \
osmo-cc-alsa-endpoint
osmo_cc_alsa_endpoint_SOURCES = \
telephone.c \
main.c
osmo_cc_alsa_endpoint_LDADD = \
$(COMMON_LA) \
../libdebug/libdebug.a \
../liboptions/liboptions.a \
../libsample/libsample.a \
../libsamplerate/libsamplerate.a \
../libfilter/libfilter.a \
../libtimer/libtimer.a \
../libjitter/libjitter.a \
../libosmocc/libosmocc.a \
../libg711/libg711.a \
-lm
if HAVE_ALSA
AM_CPPFLAGS += -DHAVE_ALSA
osmo_cc_alsa_endpoint_LDADD += \
../libsound/libsound.a \
$(ALSA_LIBS)
endif

326
src/telephone/main.c Normal file
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@ -0,0 +1,326 @@
/* osmo-cc-alsa-endpoint main
*
* (C) 2020 by Andreas Eversberg <jolly@eversberg.eu>
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <termios.h>
#include <sched.h>
#include "../libdebug/debug.h"
#include "../liboptions/options.h"
#include "../libg711/g711.h"
#include "telephone.h"
telephone_t *telephone_ep = NULL;
int num_kanal = 1;
static const char *name = "alsa";
static const char *audiodev = NULL;
static int samplerate = 48000;
static int latency = 50;
static int rt_prio = 1;
static const char *caller_id = "";
static int early_audio = 0;
static int autoalert = 0, autoanswer = 1;
#define MAX_CC_ARGS 1024
static int cc_argc = 0;
static const char *cc_argv[MAX_CC_ARGS];
static void print_usage(const char *app)
{
printf("Usage: %s -a hw:<card>,<device> [<options>] [dialing]\n", app);
}
static void print_help()
{
/* - - */
printf(" -h --help\n");
printf(" This help\n");
printf(" --config [~/]<path to config file>\n");
printf(" Give a config file to use. If it starts with '~/', path is at home dir.\n");
printf(" Each line in config file is one option, '-' or '--' must not be given!\n");
printf(" -v --verbose <level> | <level>,<category>[,<category>[,...]] | list\n");
printf(" Use 'list' to get a list of all levels and categories\n");
printf(" Verbose level: digit of debug level (default = '%d')\n", debuglevel);
printf(" Verbose level+category: level digit followed by one or more categories\n");
printf(" -> If no category is specified, all categories are selected\n");
printf(" -n --name <interface name>\n");
printf(" Give name of this interface. It will be sent in each call towards\n");
printf(" -I --caller-id <caller id>\n");
printf(" What caller ID to send on calls made from terminal. (default = '%s')\n", caller_id);
printf(" -A --auto alerting | answer | off\n");
printf(" An incoming call can be responded automatically with an alerting or an\n");
printf(" answer, or not be responded automatically. (default = 'answer')\n");
printf(" -E --early-audio\n");
printf(" Send early audio when call is not yet connected. Must be used in\n");
printf(" conjunction with --auto\n");
printf(" -a --audio-device hw:<card>,<device>\n");
printf(" Sound card and device number (default = '%s')\n", audiodev);
printf(" -s --samplerate <rate>\n");
printf(" Sample rate of sound device (default = '%d')\n", samplerate);
printf(" -b --buffer <ms>\n");
printf(" How many milliseconds are processed in advance (default = '%d')\n", latency);
printf(" -r --realtime <prio>\n");
printf(" Set prio: 0 to disable, 99 for maximum (default = %d)\n", rt_prio);
printf(" -C --cc \"<osmo-cc arg>\" [--cc ...]\n");
printf(" Pass arguments to Osmo-CC endpoint. Use '-cc help' for description.\n");
}
static void add_options(void)
{
option_add('h', "help", 0);
option_add('v', "verbose", 1);
option_add('n', "name", 1);
option_add('I', "caller-id", 1);
option_add('A', "auto", 1);
option_add('E', "early-audio", 0);
option_add('a', "audio-device", 1);
option_add('s', "samplerate", 1);
option_add('b', "buffer", 1);
option_add('r', "realtime", 1);
option_add('C', "cc", 1);
}
static int handle_options(int short_option, int argi, char **argv)
{
int rc;
switch (short_option) {
case 'h':
print_usage(argv[0]);
print_help();
return 0;
case 'v':
if (!strcasecmp(argv[argi], "list")) {
debug_list_cat();
return 0;
}
rc = parse_debug_opt(argv[argi]);
if (rc < 0) {
fprintf(stderr, "Failed to parse debug option, please use -h for help.\n");
return rc;
}
break;
case 'n':
name = options_strdup(argv[argi]);
break;
case 'I':
caller_id = options_strdup(argv[argi]);
break;
case 'A':
if (!strcasecmp(argv[argi], "alerting")) {
autoalert = 1;
autoanswer = 0;
} else
if (!strcasecmp(argv[argi], "answer")) {
autoalert = 0;
autoanswer = 1;
} else
if (!strcasecmp(argv[argi], "off")) {
autoalert = 0;
autoanswer = 0;
} else {
fprintf(stderr, "Unknown parameter '%s', please use -h for help.\n", argv[argi]);
return -EINVAL;
}
break;
case 'E':
early_audio = 1;
break;
case 'a':
audiodev = options_strdup(argv[argi]);
break;
case 's':
samplerate = atoi(argv[argi]);
break;
case 'b':
latency = atoi(argv[argi]);
break;
case 'r':
rt_prio = atoi(argv[argi]);
break;
case 'C':
if (!strcasecmp(argv[argi], "help")) {
osmo_cc_help();
return 0;
}
if (cc_argc == MAX_CC_ARGS) {
fprintf(stderr, "Too many osmo-cc args!\n");
break;
}
cc_argv[cc_argc++] = options_strdup(argv[argi]);
break;
default:
return -EINVAL;
}
return 1;
}
static int quit = 0;
void sighandler(int sigset)
{
if (sigset == SIGHUP || sigset == SIGPIPE)
return;
fprintf(stderr, "\nSignal %d received.\n", sigset);
quit = 1;
}
static int get_char()
{
struct timeval tv = {0, 0};
fd_set fds;
char c = 0;
int __attribute__((__unused__)) rc;
FD_ZERO(&fds);
FD_SET(0, &fds);
select(0+1, &fds, NULL, NULL, &tv);
if (FD_ISSET(0, &fds)) {
rc = read(0, &c, 1);
return c;
} else
return -1;
}
int main(int argc, char *argv[])
{
int argi, rc;
const char *dialing = "";
struct termios term, term_orig;
char c;
g711_init();
telephone_ep = telephone_create();
if (!telephone_ep)
goto error;
cc_argv[cc_argc++] = options_strdup("remote auto");
/* handle options / config file */
add_options();
rc = options_config_file(argc, argv, "~/.osmocom/alsa/alsa.conf", handle_options);
if (rc < 0)
return 0;
argi = options_command_line(argc, argv, handle_options);
if (argi <= 0)
return argi;
if (argi < argc)
dialing = argv[argi];
rc = ui_init(dialing, autoalert, autoanswer);
if (rc) {
PDEBUG(DTEL, DEBUG_ERROR, "UI initializing failed!\n");
goto error;
}
rc = telephone_init(telephone_ep, name, caller_id, OSMO_CC_LOCATION_USER, early_audio, audiodev, samplerate, samplerate * latency / 1000);
if (rc) {
PDEBUG(DTEL, DEBUG_ERROR, "Endpoint initializing failed!\n");
goto error;
}
rc = osmo_cc_new(&telephone_ep->cc_ep, OSMO_CC_VERSION, name, OSMO_CC_LOCATION_USER, cc_message, NULL, telephone_ep, cc_argc, cc_argv);
if (rc < 0)
goto error;
/* real time priority */
if (rt_prio > 0) {
struct sched_param schedp;
int rc;
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = rt_prio;
rc = sched_setscheduler(0, SCHED_RR, &schedp);
if (rc)
fprintf(stderr, "Error setting SCHED_RR with prio %d\n", rt_prio);
}
/* prepare terminal */
tcgetattr(0, &term_orig);
term = term_orig;
term.c_lflag &= ~(ISIG|ICANON|ECHO);
term.c_cc[VMIN]=1;
term.c_cc[VTIME]=2;
tcsetattr(0, TCSANOW, &term);
signal(SIGINT, sighandler);
signal(SIGHUP, sighandler);
signal(SIGTERM, sighandler);
signal(SIGPIPE, sighandler);
while (!quit) {
int w;
c = get_char();
if (c == 3) {
/* quit */
if (clear_console_text)
clear_console_text();
printf("CTRL+c received, quitting!\n");
quit = 1;
continue;
}
process_timer();
alsa_work(telephone_ep);
rtp_work(telephone_ep);
do {
w = 0;
w |= osmo_cc_handle();
w |= ui_work(telephone_ep, c);
c = 0;
} while (w);
usleep(1000);
}
signal(SIGINT, SIG_DFL);
signal(SIGTSTP, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGPIPE, SIG_DFL);
/* reset terminal */
tcsetattr(0, TCSANOW, &term_orig);
/* reset real time prio */
if (rt_prio > 0) {
struct sched_param schedp;
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = 0;
sched_setscheduler(0, SCHED_OTHER, &schedp);
}
error:
if (telephone_ep) {
osmo_cc_delete(&telephone_ep->cc_ep);
telephone_destroy(telephone_ep);
}
options_free();
return 0;
}

849
src/telephone/telephone.c Normal file
View File

@ -0,0 +1,849 @@
/* console handling
*
* (C) 2020 by Andreas Eversberg <jolly@eversberg.eu>
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stddef.h>
#include "../libdebug/debug.h"
#include "../libsample/sample.h"
#include "../libg711/g711.h"
#include "../libsound/sound.h"
#include "telephone.h"
#include "../libosmocc/helper.h"
static struct osmo_cc_helper_audio_codecs codecs[] = {
{ "PCMA", 8000, 1, g711_encode_alaw, g711_decode_alaw },
{ "PCMU", 8000, 1, g711_encode_ulaw, g711_decode_ulaw },
{ NULL, 0, 0, NULL, NULL},
};
const char *cause_name(int cause)
{
static char cause_str[16];
switch (cause) {
case OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR:
return "hangup";
case OSMO_CC_ISDN_CAUSE_USER_BUSY:
return "busy";
case OSMO_CC_ISDN_CAUSE_USER_ALERTING_NA:
return "no-answer";
case OSMO_CC_ISDN_CAUSE_DEST_OOO:
case OSMO_CC_ISDN_CAUSE_NETWORK_OOO:
return "out-of-order";
case OSMO_CC_ISDN_CAUSE_INV_NR_FORMAT:
return "invalid-number";
case OSMO_CC_ISDN_CAUSE_NO_CIRCUIT_CHAN:
return "no-channel";
case OSMO_CC_ISDN_CAUSE_TEMP_FAILURE:
return "link-failure";
case OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL:
return "resource-unavail";
default:
sprintf(cause_str, "cause=%d", cause);
return cause_str;
}
}
static char ui_text[256];
static char ui_clear[256];
static int ui_autoalert;
static int ui_autoanswer;
static int ui_len = 0;
#define UI_MAX_DIGITS 33
static char ui_remote_id[256] = ""; /* what we dial or who called us */
static char ui_remote_dialing[256] = ""; /* what remote called us with */
static char ui_local_id[256] = ""; /* our ID */
static const char ui_digits[] = "0123456789*#ABCDE";
static uint8_t ui_cause = 0;
static void append_string(char *string, size_t size, char c)
{
size_t len = strlen(string);
int i;
/* string full */
if (len == size - 1)
return;
for (i = 0; i < (int)strlen(ui_digits); i++) {
if (c == ui_digits[i]) {
string[len] = c;
string[len + 1] = '\0';
break;
}
}
}
/*
* Endpoint instance
*/
/* create interface instance */
telephone_t *telephone_create(void)
{
telephone_t *telephone_ep;
telephone_ep = calloc(1, sizeof(*telephone_ep));
if (!telephone_ep) {
PDEBUG(DTEL, DEBUG_ERROR, "No memory!\n");
abort();
}
PDEBUG(DTEL, DEBUG_DEBUG, "Telephone instance created\n");
return telephone_ep;
}
static void telephone_close(telephone_t *telephone_ep);
static void call_destroy(call_t *call);
/* destroy interface instance and free all resource */
void telephone_destroy(telephone_t *telephone_ep)
{
/* remove stack instance */
telephone_close(telephone_ep);
/* destroy all calls */
while (telephone_ep->call_list)
call_destroy(telephone_ep->call_list);
free((char *)telephone_ep->name);
free(telephone_ep);
PDEBUG(DTEL, DEBUG_DEBUG, "Telephone instance destroyed\n");
}
/* initialization and configuration of interface instance */
int telephone_init(telephone_t *telephone_ep, const char *name, const char *callerid, uint8_t serving_location, int early_audio, const char *audiodev, int samplerate, int __attribute__((unused)) latspl)
{
telephone_ep->name = strdup(name);
telephone_ep->serving_location = serving_location;
telephone_ep->early_audio = early_audio;
telephone_ep->samplerate = samplerate;
telephone_ep->latspl = latspl;
telephone_ep->loopback = 0;
strcpy(ui_local_id, callerid);
if (audiodev) {
#ifdef HAVE_ALSA
/* open sound device for call control */
/* use factor 1.4 of speech level for complete range of sound card */
telephone_ep->sound = sound_open(audiodev, NULL, NULL, NULL, 1, 0.0, samplerate, latspl, 1 / (SPEECH_LEVEL * 0.7079), 4000.0, 2.0);
if (!telephone_ep->sound) {
PDEBUG(DTEL, DEBUG_ERROR, "No sound device!\n");
return -EIO;
}
sound_start(telephone_ep->sound);
#else
PDEBUG(DTEL, DEBUG_ERROR, "No sound card support compiled in!\n");
return -ENOTSUP;
#endif
}
return 0;
}
static void telephone_close(telephone_t *telephone_ep)
{
if (telephone_ep->sound) {
sound_close(telephone_ep->sound);
telephone_ep->sound = NULL;
}
}
/*
* call instance
*/
static const char *call_state_name[] = {
"on hook",
"incoming setup",
"outgoing setup",
"incoming overlap",
"outgoing overlap",
"incoming proceeding",
"outgoing proceeding",
"incoming alerting",
"outgoing alerting",
"connected",
"incoming disconect",
"outgoing disconect",
};
static void call_new_state(call_t *call, enum call_state state)
{
PDEBUG(DTEL, DEBUG_DEBUG, "Call state '%s' -> '%s'\n", call_state_name[call->state], call_state_name[state]);
call->state = state;
}
static call_t *call_create(telephone_t *telephone_ep)
{
call_t *call, **call_p;
int rc;
call = calloc(1, sizeof(*call));
if (!call) {
PDEBUG(DTEL, DEBUG_ERROR, "No memory!\n");
abort();
}
call_p = &telephone_ep->call_list;
while (*call_p)
call_p = &((*call_p)->next);
*call_p = call;
call->telephone_ep = telephone_ep;
/* init sample rate conversion */
rc = init_samplerate(&call->srstate, 8000.0, (double)telephone_ep->samplerate, 3300.0);
if (rc < 0)
abort();
/* allocate jitter buffer */
rc = jitter_create(&call->dejitter, telephone_ep->samplerate / 10); // FIXME: size
if (rc < 0)
abort();
PDEBUG(DTEL, DEBUG_DEBUG, "Created new call instance\n");
return call;
}
static void call_destroy(call_t *call)
{
call_t **call_p;
/* free sdp */
free((char *)call->sdp);
/* free jitter buffer */
jitter_destroy(&call->dejitter);
/* free session description */
if (call->cc_session)
osmo_cc_free_session(call->cc_session);
/* detach */
call_p = &call->telephone_ep->call_list;
while (*call_p) {
if (*call_p == call)
break;
call_p = &((*call_p)->next);
}
*call_p = call->next;
free(call);
PDEBUG(DTEL, DEBUG_DEBUG, "destroyed call instance\n");
}
/*
* audio handling
*/
/* take audio from CC and store in jitter buffer */
void down_audio(struct osmo_cc_session_codec *codec, uint16_t __attribute__((unused)) sequence_number, uint32_t __attribute__((unused)) timestamp, uint8_t *data, int len)
{
call_t *call = codec->media->session->priv;
int count = len / 2;
sample_t samples[count];
if (call->telephone_ep->loopback != 3) {
sample_t up[(int)((double)count * call->srstate.factor + 0.5) + 10];
int16_to_samples(samples, (int16_t *)data, count);
count = samplerate_upsample(&call->srstate, samples, count, up);
jitter_save(&call->dejitter, up, count);
}
}
void alsa_work(telephone_t *telephone_ep)
{
if (!telephone_ep->sound)
return;
#ifdef HAVE_ALSA
/* handle audio, if sound device is used */
call_t *call;
sample_t samples[telephone_ep->latspl + 10], *samples_list[1];
uint8_t *power_list[1];
int count;
int rc;
/* hunt for call */
for (call = telephone_ep->call_list; call; call = call->next)
break; // just any call
count = sound_get_tosend(telephone_ep->sound, telephone_ep->latspl);
if (count < 0) {
PDEBUG(DTEL, DEBUG_ERROR, "Failed to get samples in buffer (rc = %d)!\n", count);
if (count == -EPIPE)
PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n");
return;
}
if (count > 0) {
if (call)
jitter_load(&call->dejitter, samples, count);
else
memset(samples, 0, sizeof(*samples) * count);
samples_list[0] = samples;
power_list[0] = NULL;
rc = sound_write(telephone_ep->sound, samples_list, power_list, count, NULL, NULL, 1);
if (rc < 0) {
PDEBUG(DTEL, DEBUG_ERROR, "Failed to write TX data to sound device (rc = %d)\n", rc);
if (rc == -EPIPE)
PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n");
return;
}
}
samples_list[0] = samples;
count = sound_read(telephone_ep->sound, samples_list, telephone_ep->latspl, 1, NULL);
if (count < 0) {
PDEBUG(DTEL, DEBUG_ERROR, "Failed to read from sound device (rc = %d)!\n", count);
if (count == -EPIPE)
PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n");
return;
}
if (call && count) {
int i;
if (telephone_ep->loopback == 3)
jitter_save(&call->dejitter, samples, count);
count = samplerate_downsample(&call->srstate, samples, count);
/* put samples into ring buffer */
for (i = 0; i < count; i++) {
call->tx_buffer[call->tx_buffer_pos] = samples[i];
/* if ring buffer wrapps, deliver data down to call process */
if (++call->tx_buffer_pos == 160) {
call->tx_buffer_pos = 0;
/* only if we have a call */
if (call->cc_callref && call->codec) {
int16_t data[160];
samples_to_int16(data, call->tx_buffer, 160);
osmo_cc_rtp_send(call->codec, (uint8_t *)data, 160 * 2, 1, 160);
}
}
}
}
//printf("%p, %p\n", call, call ? call->codec : NULL);
// if (call && call->codec)
// while (osmo_cc_rtp_receive(call->codec->media) >= 0);
#endif
}
void rtp_work(telephone_t *telephone_ep)
{
call_t *call;
call = telephone_ep->call_list;
while (call) {
if (call->cc_session)
osmo_cc_session_handle(call->cc_session);
call = call->next;
}
}
/*
* handle message from CC
*/
static void release_reject_ind(call_t *call, uint8_t msg_type, uint8_t isdn_cause)
{
osmo_cc_msg_t *new_msg;
/* create osmo-cc message */
new_msg = osmo_cc_new_msg(msg_type);
/* cause */
osmo_cc_add_ie_cause(new_msg, call->telephone_ep->serving_location, isdn_cause, 0, 0);
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg);
/* change state */
call_new_state(call, CALL_STATE_IDLE);
/* destroy call */
call_destroy(call);
}
void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg)
{
telephone_t *telephone_ep = ep->priv;
call_t *call, *other;
osmo_cc_msg_t *new_msg;
uint8_t type, plan, present, screen;
char callerid[128], dialing[128];
uint8_t coding, location, progress, socket_cause;
uint16_t sip_cause;
int rc;
int i;
/* hunt for callref */
call = telephone_ep->call_list;
while (call) {
if (call->cc_callref == callref)
break;
call = call->next;
}
/* process SETUP */
if (!call) {
if (msg->type != OSMO_CC_MSG_SETUP_REQ) {
PDEBUG(DTEL, DEBUG_ERROR, "received message without call instance, please fix!\n");
goto done;
}
/* creating call instance */
call = call_create(telephone_ep);
if (!call) {
PDEBUG(DTEL, DEBUG_ERROR, "Cannot create calll instance.\n");
abort();
}
/* link with cc */
call->cc_callref = callref;
}
switch (msg->type) {
case OSMO_CC_MSG_SETUP_REQ: /* dial-out command received from epoint */
/* hunt for call */
for (other = telephone_ep->call_list; other; other = other->next) {
if (other != call)
break;
}
if (other) {
release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_USER_BUSY);
break;
}
/* calling */
rc = osmo_cc_get_ie_calling(msg, 0, &type, &plan, &present, &screen, callerid, sizeof(callerid));
if (rc >= 0)
strncpy(ui_remote_id, callerid, sizeof(ui_remote_id) - 1);
/* called */
rc = osmo_cc_get_ie_called(msg, 0, &type, &plan, dialing, sizeof(dialing));
if (rc >= 0)
strncpy(ui_remote_dialing, dialing, sizeof(ui_remote_dialing) - 1);
PDEBUG(DTEL, DEBUG_INFO, "Incoming call from '%s' to '%s'\n", ui_remote_id, ui_remote_dialing);
/* sdp accept */
call->sdp = osmo_cc_helper_audio_accept(call, codecs, down_audio, msg, &call->cc_session, &call->codec, 0);
if (!call->sdp) {
release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
call->sdp = strdup(call->sdp);
/* change state */
call_new_state(call, CALL_STATE_IN_SETUP);
if (ui_autoanswer) {
/* create osmo-cc message */
new_msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_CNF);
/* sdp */
osmo_cc_add_ie_sdp(new_msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg);
/* change state */
call_new_state(call, CALL_STATE_CONNECT);
} else
if (ui_autoalert) {
/* create osmo-cc message */
new_msg = osmo_cc_new_msg(OSMO_CC_MSG_ALERT_IND);
/* sdp */
osmo_cc_add_ie_sdp(new_msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg);
/* change state */
call_new_state(call, CALL_STATE_IN_ALERTING);
}
break;
case OSMO_CC_MSG_SETUP_ACK_REQ: /* more information is needed */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
PDEBUG(DTEL, DEBUG_INFO, "Incoming call acknowledged\n");
/* change state */
call_new_state(call, CALL_STATE_OUT_OVERLAP);
break;
case OSMO_CC_MSG_PROC_REQ: /* call of endpoint is proceeding */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
PDEBUG(DTEL, DEBUG_INFO, "Incoming call proceeding\n");
/* change state */
call_new_state(call, CALL_STATE_OUT_PROCEEDING);
break;
case OSMO_CC_MSG_ALERT_REQ: /* call of endpoint is ringing */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
PDEBUG(DTEL, DEBUG_INFO, "Incoming call alerting\n");
/* change state */
call_new_state(call, CALL_STATE_OUT_ALERTING);
break;
case OSMO_CC_MSG_SETUP_RSP: /* call of endpoint is connected */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
PDEBUG(DTEL, DEBUG_INFO, "Incoming call acknowledged\n");
/* create osmo-cc message */
new_msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_COMP_IND);
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg);
/* change state */
call_new_state(call, CALL_STATE_CONNECT);
break;
case OSMO_CC_MSG_SETUP_COMP_REQ: /* call of endpoint is connected */
break;
case OSMO_CC_MSG_INFO_REQ: /* overlap dialing */
rc = osmo_cc_get_ie_called(msg, 0, &type, &plan, dialing, sizeof(dialing));
if (rc < 0)
dialing[0] = '\0';
PDEBUG(DTEL, DEBUG_INFO, "Incoming call received additional dialing '%s'\n", dialing);
for (i = 0; dialing[i]; i++) {
/* add to dial string */
append_string(ui_remote_dialing, sizeof(ui_remote_dialing), dialing[i]);
}
break;
case OSMO_CC_MSG_PROGRESS_REQ: /* progress */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
PDEBUG(DTEL, DEBUG_INFO, "Incoming call received progress\n");
break;
case OSMO_CC_MSG_NOTIFY_REQ: /* display and notifications */
break;
case OSMO_CC_MSG_REJ_REQ: /* call has been rejected */
/* get cause */
rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause);
if (rc < 0)
ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR;
else
PDEBUG(DTEL, DEBUG_INFO, "Incoming call rejected: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause);
/* change state */
call_new_state(call, CALL_STATE_IDLE);
/* destroy call */
call_destroy(call);
break;
case OSMO_CC_MSG_DISC_REQ: /* call has been disconnected */
rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec);
if (rc < 0) {
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL);
break;
}
/* get cause */
rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause);
if (rc < 0)
ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR;
else
PDEBUG(DTEL, DEBUG_INFO, "Disconnect by remote: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause);
/* change state */
call_new_state(call, CALL_STATE_IN_DISCONNECT);
/* progress indicator */
rc = osmo_cc_get_ie_progress(msg, 0, &coding, &location, &progress);
if (rc < 0 || coding != OSMO_CC_CODING_ITU_T || !(progress == 1 || progress == 8)) {
PDEBUG(DTEL, DEBUG_INFO, "no audio after disconnect, releasing!\n");
release_reject_ind(call, OSMO_CC_MSG_REL_IND, ui_cause);
}
break;
case OSMO_CC_MSG_REL_REQ: /* release call */
/* get cause */
rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause);
if (rc < 0)
ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR;
else
PDEBUG(DTEL, DEBUG_INFO, "Disconnect by remote: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause);
/* create osmo-cc message */
new_msg = osmo_cc_new_msg(OSMO_CC_MSG_REL_CNF);
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg);
/* change state */
call_new_state(call, CALL_STATE_IDLE);
/* destroy call */
call_destroy(call);
break;
default:
PDEBUG(DTEL, DEBUG_ERROR, "received an unsupported CC message: %d\n", msg->type);
}
done:
osmo_cc_free_msg(msg);
}
/*
* user interface
*/
static void _clear_ui_text(void)
{
if (!ui_len)
return;
fwrite(ui_clear, ui_len, 1, stdout);
// note: fflused by user of this function
ui_len = 0;
}
static void _print_ui_text(void)
{
if (!ui_len)
return;
printf("\033[1;37m");
fwrite(ui_text, ui_len, 1, stdout);
printf("\033[0;39m");
}
int ui_init(const char *remote_id, int autoalert, int autoanswer)
{
clear_console_text = _clear_ui_text;
print_console_text = _print_ui_text;
ui_autoalert = autoalert;
ui_autoanswer = autoanswer;
strncpy(ui_remote_id, remote_id, sizeof(ui_remote_id) - 1);
ui_remote_id[sizeof(ui_remote_id) - 1] = '\0';
return 0;
}
int ui_work(telephone_t *telephone_ep, int c)
{
int work = (c > 0) ? 1 : 0;
call_t *call;
osmo_cc_msg_t *msg;
char text[1024] = "";
char display[UI_MAX_DIGITS + 1];
int len;
/* hunt for call */
for (call = telephone_ep->call_list; call; call = call->next)
break; // just any call
if (!call) {
if (c > 0) {
append_string(ui_remote_id, sizeof(ui_remote_id), c);
if ((c == 8 || c == 127) && strlen(ui_remote_id))
ui_remote_id[strlen(ui_remote_id) - 1] = '\0';
dial_after_hangup:
if (c == 'd') {
PDEBUG(DTEL, DEBUG_INFO, "Outgoing call from '%s' to '%s'\n", ui_local_id, ui_remote_id);
ui_remote_dialing[0] = '\0';
/* creating call instance */
call = call_create(telephone_ep);
if (!call) {
PDEBUG(DTEL, DEBUG_ERROR, "Cannot create calll instance.\n");
abort();
}
/* setup message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_IND);
/* network type */
osmo_cc_add_ie_calling_network(msg, OSMO_CC_NETWORK_ALSA_NONE, "");
/* calling number */
osmo_cc_add_ie_calling(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, OSMO_CC_PRESENT_ALLOWED, OSMO_CC_SCREEN_USER_UNSCREENED, ui_local_id);
/* called number */
osmo_cc_add_ie_called(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, ui_remote_id);
/* bearer capability */
osmo_cc_add_ie_bearer(msg, OSMO_CC_CODING_ITU_T, OSMO_CC_CAPABILITY_AUDIO, OSMO_CC_MODE_CIRCUIT);
/* sdp offer */
call->cc_session = osmo_cc_helper_audio_offer(call, codecs, down_audio, msg, 1);
if (!call->cc_session) {
PDEBUG(DTEL, DEBUG_NOTICE, "Failed to offer audio, call aborted.\n");
osmo_cc_free_msg(msg);
call_destroy(call);
} else {
/* create new call */
osmo_cc_call_t *cc_call = osmo_cc_call_new(&call->telephone_ep->cc_ep);
call->cc_callref = cc_call->callref;
/* send message to CC */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* change state */
call_new_state(call, CALL_STATE_OUT_SETUP);
}
}
}
memset(display, '.', UI_MAX_DIGITS);
memcpy(display, ui_remote_id, strlen(ui_remote_id));
display[UI_MAX_DIGITS] = '\0';
sprintf(text, "%s: %s (press digits 0..9 or d=dial)\r", call_state_name[(call) ? call->state : CALL_STATE_IDLE], display);
goto done;
}
if (c == 'h' || (c == 'd' && call->state == CALL_STATE_IN_DISCONNECT)) {
PDEBUG(DTEL, DEBUG_INFO, "Call hangup\n");
/* create osmo-cc message */
if (call->state == CALL_STATE_IN_SETUP)
release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR);
else
release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR);
/* dial new number */
if (c == 'd') {
call = NULL;
goto dial_after_hangup;
}
goto done;
}
if (c == 'o' && call->state == CALL_STATE_IN_SETUP) {
PDEBUG(DTEL, DEBUG_INFO, "Acknowledge incoming call\n");
/* create osmo-cc message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_ACK_IND);
if (call->telephone_ep->early_audio && call->sdp) {
/* progress */
osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE);
/* sdp */
osmo_cc_add_ie_sdp(msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
}
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* change state */
call_new_state(call, CALL_STATE_IN_OVERLAP);
}
if (c == 'p' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP)) {
PDEBUG(DTEL, DEBUG_INFO, "Proceeding incoming call\n");
/* create osmo-cc message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_PROC_IND);
if (call->telephone_ep->early_audio && call->sdp) {
/* progress */
osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE);
/* sdp */
osmo_cc_add_ie_sdp(msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
}
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* change state */
call_new_state(call, CALL_STATE_IN_PROCEEDING);
}
if (c == 'a' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP || call->state == CALL_STATE_IN_PROCEEDING)) {
PDEBUG(DTEL, DEBUG_INFO, "Alerting incoming call\n");
/* create osmo-cc message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_ALERT_IND);
if (call->telephone_ep->early_audio && call->sdp) {
/* progress */
osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE);
/* sdp */
osmo_cc_add_ie_sdp(msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
}
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* change state */
call_new_state(call, CALL_STATE_IN_ALERTING);
}
if (c == 'c' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP || call->state == CALL_STATE_IN_PROCEEDING || call->state == CALL_STATE_IN_ALERTING)) {
PDEBUG(DTEL, DEBUG_INFO, "Answer incoming call\n");
/* create osmo-cc message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_CNF);
/* sdp */
if (call->sdp) {
osmo_cc_add_ie_sdp(msg, call->sdp);
free((char *)call->sdp);
call->sdp = NULL;
}
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* change state */
call_new_state(call, CALL_STATE_CONNECT);
}
if (c > 0 && call->state == CALL_STATE_OUT_OVERLAP && strchr(ui_digits, c)) {
PDEBUG(DTEL, DEBUG_INFO, "Send digit %c\n", c);
char called[] = { c, '\0' };
/* create osmo-cc message */
msg = osmo_cc_new_msg(OSMO_CC_MSG_INFO_IND);
/* add dialing */
osmo_cc_add_ie_called(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, called);
/* send message to osmo-cc */
osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg);
/* add to dial string */
append_string(ui_remote_id, sizeof(ui_remote_id), c);
}
/* NOTE: the state is from console view: a call towards CC is OUT and from CC is IN */
switch (call->state) {
case CALL_STATE_OUT_SETUP:
case CALL_STATE_OUT_PROCEEDING:
case CALL_STATE_OUT_ALERTING:
sprintf(text, "%s: %s (press h=hangup)\r", call_state_name[call->state], ui_remote_id);
break;
case CALL_STATE_OUT_OVERLAP:
sprintf(text, "%s: %s (press digits 0..9 h=hangup)\r", call_state_name[call->state], ui_remote_id);
break;
case CALL_STATE_CONNECT:
if (ui_remote_dialing[0])
sprintf(text, "%s: %s->%s (press h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing);
else
sprintf(text, "%s: %s (press h=hangup)\r", call_state_name[call->state], ui_remote_id);
break;
case CALL_STATE_IN_DISCONNECT:
sprintf(text, "%s: %s (press h=hangup d=redial)\r", call_state_name[call->state], cause_name(ui_cause));
break;
case CALL_STATE_IN_SETUP:
sprintf(text, "%s: %s->%s (press o=overlap p=proceeding a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing);
break;
case CALL_STATE_IN_OVERLAP:
sprintf(text, "%s: %s->%s (press p=proceeding a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing);
break;
case CALL_STATE_IN_PROCEEDING:
sprintf(text, "%s: %s->%s (press a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing);
break;
case CALL_STATE_IN_ALERTING:
sprintf(text, "%s: %s->%s (press c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing);
break;
default:
break;
}
done:
/* skip if nothing has changed */
len = strlen(text);
if (ui_len == len && !memcmp(ui_text, text, len))
return work;
clear_console_text();
ui_len = len;
memcpy(ui_text, text, len);
memset(ui_clear, ' ', len - 1);
ui_clear[len - 1] = '\r';
print_console_text();
fflush(stdout);
return work;
}

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src/telephone/telephone.h Normal file
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#include "../libtimer/timer.h"
#include "../libosmocc/endpoint.h"
#include "../libsample/sample.h"
#include "../libsamplerate/samplerate.h"
#include "../libjitter/jitter.h"
enum call_state {
CALL_STATE_IDLE = 0, /* no call */
CALL_STATE_IN_SETUP, /* incoming connection */
CALL_STATE_OUT_SETUP, /* outgoing connection */
CALL_STATE_IN_OVERLAP, /* more informatiopn needed */
CALL_STATE_OUT_OVERLAP, /* more informatiopn needed */
CALL_STATE_IN_PROCEEDING,/* call is proceeding */
CALL_STATE_OUT_PROCEEDING,/* call is proceeding */
CALL_STATE_IN_ALERTING, /* call is ringing */
CALL_STATE_OUT_ALERTING,/* call is ringing */
CALL_STATE_CONNECT, /* call is connected and transmission is enabled */
CALL_STATE_IN_DISCONNECT,/* incoming disconnected */
CALL_STATE_OUT_DISCONNECT,/* outgoing disconnected */
};
struct telephone;
struct call_list;
typedef struct telephone {
osmo_cc_endpoint_t cc_ep;
struct call_list *call_list;
const char *name;
/* settings */
int serving_location; /* who we serve when sending causes towards interface */
int early_audio;
/* sound */
int loopback;
int samplerate; /* sample rate of headphone interface */
int latspl;
void *sound; /* headphone interface */
} telephone_t;
typedef struct call_list {
struct call_list *next;
telephone_t *telephone_ep;
/* alsa states */
/* osmo-cc states */
uint32_t cc_callref;
const char *sdp;
osmo_cc_session_t *cc_session;
osmo_cc_session_codec_t *codec;
int codec_negotiated;
/* call states */
enum call_state state;
/* audio states */
jitter_t dejitter;
samplerate_t srstate;
sample_t tx_buffer[160]; /* transmit audio buffer */
int tx_buffer_pos; /* current position in transmit audio buffer */
} call_t;
void telephone_destroy(telephone_t *telephone_ep);
telephone_t *telephone_create(void);
int telephone_init(telephone_t *telephone_ep, const char *name, const char *callerid, uint8_t serving_location, int early_audio, const char *audiodev, int samplerate, int __attribute__((unused)) latspl);
void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg);
int ui_init(const char *remote_id, int autoalert, int autoanswer);
int ui_work(telephone_t *telephone_ep, int c);
void alsa_work(telephone_t *telephone_ep);
void rtp_work(telephone_t *telephone_ep);