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shairport.c
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shairport.c
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/*
* Shairport, an Apple Airplay receiver
* Copyright (c) James Laird 2013
* All rights reserved.
* Modifications (c) Mike Brady 2014--2018
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libconfig.h>
#include <libgen.h>
#include <memory.h>
#include <sys/socket.h>
#include <net/if.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "config.h"
#ifdef HAVE_LIBMBEDTLS
#include <mbedtls/md5.h>
#endif
#ifdef HAVE_LIBPOLARSSL
#include <polarssl/md5.h>
#endif
#ifdef HAVE_LIBSSL
#include <openssl/md5.h>
#endif
#if defined(HAVE_DBUS)
#include <glib.h>
#endif
#if defined(HAVE_DACP_CLIENT)
#include "dacp.h"
#endif
#if defined(HAVE_METADATA_HUB)
#include "metadata_hub.h"
#endif
#ifdef HAVE_DBUS
#include "dbus-service.h"
#endif
#ifdef HAVE_MPRIS
#include "mpris-service.h"
#endif
#include "common.h"
#include "mdns.h"
#include "rtp.h"
#include "rtsp.h"
#include <libdaemon/dexec.h>
#include <libdaemon/dfork.h>
#include <libdaemon/dlog.h>
#include <libdaemon/dpid.h>
#include <libdaemon/dsignal.h>
#ifdef CONFIG_CONVOLUTION
#include <FFTConvolver/convolver.h>
#endif
static int shutting_down = 0;
char configuration_file_path[4096 + 1];
char actual_configuration_file_path[4096 + 1];
void shairport_shutdown() {
if (shutting_down)
return;
shutting_down = 1;
mdns_unregister();
rtsp_request_shutdown_stream();
if (config.output)
config.output->deinit();
}
static void sig_ignore(__attribute__((unused)) int foo, __attribute__((unused)) siginfo_t *bar,
__attribute__((unused)) void *baz) {}
static void sig_shutdown(__attribute__((unused)) int foo, __attribute__((unused)) siginfo_t *bar,
__attribute__((unused)) void *baz) {
debug(1, "shutdown requested...");
shairport_shutdown();
// daemon_log(LOG_NOTICE, "exit...");
daemon_retval_send(255);
daemon_pid_file_remove();
exit(0);
}
static void sig_child(__attribute__((unused)) int foo, __attribute__((unused)) siginfo_t *bar,
__attribute__((unused)) void *baz) {
pid_t pid;
while ((pid = waitpid((pid_t)-1, 0, WNOHANG)) > 0) {
if (pid == mdns_pid && !shutting_down) {
die("MDNS child process died unexpectedly!");
}
}
}
static void sig_disconnect_audio_output(__attribute__((unused)) int foo,
__attribute__((unused)) siginfo_t *bar,
__attribute__((unused)) void *baz) {
debug(1, "disconnect audio output requested.");
set_requested_connection_state_to_output(0);
}
static void sig_connect_audio_output(__attribute__((unused)) int foo,
__attribute__((unused)) siginfo_t *bar,
__attribute__((unused)) void *baz) {
debug(1, "connect audio output requested.");
set_requested_connection_state_to_output(1);
}
void print_version(void) {
char *version_string = get_version_string();
if (version_string) {
printf("%s\n", version_string);
free(version_string);
} else {
debug(1, "Can't print version string!");
}
}
void usage(char *progname) {
printf("Usage: %s [options...]\n", progname);
printf(" or: %s [options...] -- [audio output-specific options]\n", progname);
printf("\n");
printf("Options:\n");
printf(" -h, --help show this help.\n");
printf(" -d, --daemon daemonise.\n");
printf(" -j, --justDaemoniseNoPIDFile daemonise without a PID file.\n");
printf(" -V, --version show version information.\n");
printf(" -k, --kill kill the existing shairport daemon.\n");
printf(" -D, --disconnectFromOutput disconnect immediately from the output device.\n");
printf(" -R, --reconnectToOutput reconnect to the output device.\n");
printf(" -c, --configfile=FILE read configuration settings from FILE. Default is "
"/etc/shairport-sync.conf.\n");
printf("\n");
printf("The following general options are for backward compatibility. These and all new options "
"have settings in the configuration file, by default /etc/shairport-sync.conf:\n");
printf(" -v, --verbose -v print debug information; -vv more; -vvv lots.\n");
printf(" -p, --port=PORT set RTSP listening port.\n");
printf(" -a, --name=NAME set advertised name.\n");
printf(" -L, --latency=FRAMES [Deprecated] Set the latency for audio sent from an unknown "
"device.\n");
printf(" The default is to set it automatically.\n");
printf(" The default is to set it automatically.\n");
printf(" -S, --stuffing=MODE set how to adjust current latency to match desired latency, "
"where \n");
printf(" \"basic\" (default) inserts or deletes audio frames from "
"packet frames with low processor overhead, and \n");
printf(" \"soxr\" uses libsoxr to minimally resample packet frames -- "
"moderate processor overhead.\n");
printf(
" \"soxr\" option only available if built with soxr support.\n");
printf(" -B, --on-start=PROGRAM run PROGRAM when playback is about to begin.\n");
printf(" -E, --on-stop=PROGRAM run PROGRAM when playback has ended.\n");
printf(" For -B and -E options, specify the full path to the program, "
"e.g. /usr/bin/logger.\n");
printf(
" Executable scripts work, but must have the appropriate shebang "
"(#!/bin/sh) in the headline.\n");
printf(
" -w, --wait-cmd wait until the -B or -E programs finish before continuing.\n");
printf(" -o, --output=BACKEND select audio output method.\n");
printf(" -m, --mdns=BACKEND force the use of BACKEND to advertize the service.\n");
printf(" if no mdns provider is specified,\n");
printf(" shairport tries them all until one works.\n");
printf(" -r, --resync=THRESHOLD [Deprecated] resync if error exceeds this number of frames. "
"Set to 0 to "
"stop resyncing.\n");
printf(" -t, --timeout=SECONDS go back to idle mode from play mode after a break in "
"communications of this many seconds (default 120). Set to 0 never to exit play mode.\n");
printf(" --statistics print some interesting statistics -- output to the logfile "
"if running as a daemon.\n");
printf(" --tolerance=TOLERANCE [Deprecated] allow a synchronization error of TOLERANCE "
"frames (default "
"88) before trying to correct it.\n");
printf(" --password=PASSWORD require PASSWORD to connect. Default is not to require a "
"password.\n");
printf(" --logOutputLevel log the output level setting -- useful for setting maximum "
"volume.\n");
#ifdef CONFIG_METADATA
printf(" --metadata-pipename=PIPE send metadata to PIPE, e.g. "
"--metadata-pipename=/tmp/shairport-sync-metadata.\n");
printf(" The default is /tmp/shairport-sync-metadata.\n");
printf(" --get-coverart send cover art through the metadata pipe.\n");
#endif
printf("\n");
mdns_ls_backends();
printf("\n");
audio_ls_outputs();
}
int parse_options(int argc, char **argv) {
// there are potential memory leaks here -- it's called a second time, previously allocated
// strings will dangle.
char *raw_service_name = NULL; /* Used to pick up the service name before possibly expanding it */
char *stuffing = NULL; /* used for picking up the stuffing option */
signed char c; /* used for argument parsing */
// int i = 0; /* used for tracking options */
int fResyncthreshold = (int)(config.resyncthreshold * 44100);
int fTolerance = (int)(config.tolerance * 44100);
poptContext optCon; /* context for parsing command-line options */
int daemonisewith = 0;
int daemonisewithout = 0;
struct poptOption optionsTable[] = {
{"verbose", 'v', POPT_ARG_NONE, NULL, 'v', NULL, NULL},
{"disconnectFromOutput", 'D', POPT_ARG_NONE, NULL, 0, NULL, NULL},
{"reconnectToOutput", 'R', POPT_ARG_NONE, NULL, 0, NULL, NULL},
{"kill", 'k', POPT_ARG_NONE, NULL, 0, NULL, NULL},
{"daemon", 'd', POPT_ARG_NONE, &daemonisewith, 0, NULL, NULL},
{"justDaemoniseNoPIDFile", 'j', POPT_ARG_NONE, &daemonisewithout, 0, NULL, NULL},
{"configfile", 'c', POPT_ARG_STRING, &config.configfile, 0, NULL, NULL},
{"statistics", 0, POPT_ARG_NONE, &config.statistics_requested, 0, NULL, NULL},
{"logOutputLevel", 0, POPT_ARG_NONE, &config.logOutputLevel, 0, NULL, NULL},
{"version", 'V', POPT_ARG_NONE, NULL, 0, NULL, NULL},
{"port", 'p', POPT_ARG_INT, &config.port, 0, NULL, NULL},
{"name", 'a', POPT_ARG_STRING, &raw_service_name, 0, NULL, NULL},
{"output", 'o', POPT_ARG_STRING, &config.output_name, 0, NULL, NULL},
{"on-start", 'B', POPT_ARG_STRING, &config.cmd_start, 0, NULL, NULL},
{"on-stop", 'E', POPT_ARG_STRING, &config.cmd_stop, 0, NULL, NULL},
{"wait-cmd", 'w', POPT_ARG_NONE, &config.cmd_blocking, 0, NULL, NULL},
{"mdns", 'm', POPT_ARG_STRING, &config.mdns_name, 0, NULL, NULL},
{"latency", 'L', POPT_ARG_INT, &config.userSuppliedLatency, 0, NULL, NULL},
{"stuffing", 'S', POPT_ARG_STRING, &stuffing, 'S', NULL, NULL},
{"resync", 'r', POPT_ARG_INT, &fResyncthreshold, 0, NULL, NULL},
{"timeout", 't', POPT_ARG_INT, &config.timeout, 't', NULL, NULL},
{"password", 0, POPT_ARG_STRING, &config.password, 0, NULL, NULL},
{"tolerance", 'z', POPT_ARG_INT, &fTolerance, 0, NULL, NULL},
#ifdef CONFIG_METADATA
{"metadata-pipename", 'M', POPT_ARG_STRING, &config.metadata_pipename, 'M', NULL, NULL},
{"get-coverart", 'g', POPT_ARG_NONE, &config.get_coverart, 'g', NULL, NULL},
#endif
POPT_AUTOHELP{NULL, 0, 0, NULL, 0, NULL, NULL}};
// we have to parse the command line arguments to look for a config file
int optind;
optind = argc;
int j;
for (j = 0; j < argc; j++)
if (strcmp(argv[j], "--") == 0)
optind = j;
optCon = poptGetContext(NULL, optind, (const char **)argv, optionsTable, 0);
poptSetOtherOptionHelp(optCon, "[OPTIONS]* ");
/* Now do options processing just to get a debug level */
debuglev = 0;
while ((c = poptGetNextOpt(optCon)) >= 0) {
switch (c) {
case 'v':
debuglev++;
break;
case 'D':
inform("Warning: the option -D or --disconnectFromOutput is deprecated.");
break;
case 'R':
inform("Warning: the option -R or --reconnectToOutput is deprecated.");
break;
case 'A':
inform("Warning: the option -A or --AirPlayLatency is deprecated and ignored. This setting "
"is now "
"automatically received from the AirPlay device.");
break;
case 'i':
inform("Warning: the option -i or --iTunesLatency is deprecated and ignored. This setting is "
"now "
"automatically received from iTunes");
break;
case 'f':
inform(
"Warning: the option --forkedDaapdLatency is deprecated and ignored. This setting is now "
"automatically received from forkedDaapd");
break;
case 'r':
inform("Warning: the option -r or --resync is deprecated. Please use the "
"\"resync_threshold_in_seconds\" setting in the config file instead.");
break;
case 'z':
inform("Warning: the option --tolerance is deprecated. Please use the "
"\"drift_tolerance_in_seconds\" setting in the config file instead.");
break;
}
}
if (c < -1) {
die("%s: %s", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(c));
}
if ((daemonisewith) && (daemonisewithout))
die("Select either daemonize_with_pid_file or daemonize_without_pid_file -- you have selected "
"both!");
if ((daemonisewith) || (daemonisewithout)) {
config.daemonise = 1;
if (daemonisewith)
config.daemonise_store_pid = 1;
};
config.resyncthreshold = 1.0 * fResyncthreshold / 44100;
config.tolerance = 1.0 * fTolerance / 44100;
config.audio_backend_silent_lead_in_time = -1.0; // flag to indicate it has not been set
config.airplay_volume = -18.0; // if no volume is ever set, default to initial default value if
// nothing else comes in first.
config.fixedLatencyOffset = 11025; // this sounds like it works properly.
#ifdef HAVE_METADATA_HUB
config.cover_art_cache_dir = "/tmp/shairport-sync/.cache/coverart";
config.scan_interval_when_active =
1; // number of seconds between DACP server scans when playing something
config.scan_interval_when_inactive =
3; // number of seconds between DACP server scans playing nothing
config.scan_max_bad_response_count =
5; // number of successive bad results to ignore before giving up
config.scan_max_inactive_count =
(15 * 60) / config.scan_interval_when_inactive; // number of scans to do before stopping if
// not made active again (15 minutes)
// config.scan_max_inactive_count = 5; // number of scans to do before stopping if not made active
// again (15 minutes )
#endif
// config_setting_t *setting;
const char *str = 0;
int value = 0;
double dvalue = 0.0;
// debug(1, "Looking for the configuration file \"%s\".", config.configfile);
config_init(&config_file_stuff);
char *config_file_real_path = realpath(config.configfile, NULL);
if (config_file_real_path == NULL) {
debug(2, "Can't resolve the configuration file \"%s\".", config.configfile);
} else {
debug(2, "Looking for configuration file at full path \"%s\"", config_file_real_path);
/* Read the file. If there is an error, report it and exit. */
if (config_read_file(&config_file_stuff, config_file_real_path)) {
// make config.cfg point to it
config.cfg = &config_file_stuff;
/* Get the Service Name. */
if (config_lookup_string(config.cfg, "general.name", &str)) {
raw_service_name = (char *)str;
}
int daemonisewithout = 0;
int daemonisewith = 0;
/* Get the Daemonize setting. */
if (config_lookup_string(config.cfg, "sessioncontrol.daemonize_with_pid_file", &str)) {
if (strcasecmp(str, "no") == 0)
daemonisewith = 0;
else if (strcasecmp(str, "yes") == 0)
daemonisewith = 1;
else
die("Invalid daemonize_with_pid_file option choice \"%s\". It should be \"yes\" or "
"\"no\"");
}
/* Get the Just_Daemonize setting. */
if (config_lookup_string(config.cfg, "sessioncontrol.daemonize_without_pid_file", &str)) {
if (strcasecmp(str, "no") == 0)
daemonisewithout = 0;
else if (strcasecmp(str, "yes") == 0)
daemonisewithout = 1;
else
die("Invalid daemonize_without_pid_file option choice \"%s\". It should be \"yes\" or "
"\"no\"");
}
if ((daemonisewith) && (daemonisewithout))
die("Select either daemonize_with_pid_file or daemonize_without_pid_file -- you have "
"selected both!");
if ((daemonisewith) || (daemonisewithout)) {
config.daemonise = 1;
if (daemonisewith)
config.daemonise_store_pid = 1;
}
/* Get the directory path for the pid file created when the program is daemonised. */
if (config_lookup_string(config.cfg, "sessioncontrol.daemon_pid_dir", &str))
config.piddir = (char *)str;
/* Get the mdns_backend setting. */
if (config_lookup_string(config.cfg, "general.mdns_backend", &str))
config.mdns_name = (char *)str;
/* Get the output_backend setting. */
if (config_lookup_string(config.cfg, "general.output_backend", &str))
config.output_name = (char *)str;
/* Get the port setting. */
if (config_lookup_int(config.cfg, "general.port", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 5000",
value);
else
config.port = value;
}
/* Get the udp port base setting. */
if (config_lookup_int(config.cfg, "general.udp_port_base", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 6001",
value);
else
config.udp_port_base = value;
}
/* Get the udp port range setting. This is number of ports that will be tried for free ports ,
* starting at the port base. Only three ports are needed. */
if (config_lookup_int(config.cfg, "general.udp_port_range", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port range \"%sd\". It should be between 0 and 65535, default is 100",
value);
else
config.udp_port_range = value;
}
/* Get the password setting. */
if (config_lookup_string(config.cfg, "general.password", &str))
config.password = (char *)str;
if (config_lookup_string(config.cfg, "general.interpolation", &str)) {
if (strcasecmp(str, "basic") == 0)
config.packet_stuffing = ST_basic;
else if (strcasecmp(str, "soxr") == 0)
#ifdef HAVE_LIBSOXR
config.packet_stuffing = ST_soxr;
#else
die("The soxr option not available because this version of shairport-sync was built "
"without libsoxr "
"support. Change the \"general/interpolation\" setting in the configuration file.");
#endif
else
die("Invalid interpolation option choice. It should be \"basic\" or \"soxr\"");
}
/* Get the statistics setting. */
if (config_lookup_string(config.cfg, "general.statistics", &str)) {
warn("The \"general\" \"statistics\" setting is deprecated. Please use the \"diagnostics\" "
"\"statistics\" setting instead.");
if (strcasecmp(str, "no") == 0)
config.statistics_requested = 0;
else if (strcasecmp(str, "yes") == 0)
config.statistics_requested = 1;
else
die("Invalid statistics option choice \"%s\". It should be \"yes\" or \"no\"");
}
/* The old drift tolerance setting. */
if (config_lookup_int(config.cfg, "general.drift", &value)) {
inform("The drift setting is deprecated. Use "
"drift_tolerance_in_seconds instead");
config.tolerance = 1.0 * value / 44100;
}
/* The old resync setting. */
if (config_lookup_int(config.cfg, "general.resync_threshold", &value)) {
inform("The resync_threshold setting is deprecated. Use "
"resync_threshold_in_seconds instead");
config.resyncthreshold = 1.0 * value / 44100;
}
/* Get the drift tolerance setting. */
if (config_lookup_float(config.cfg, "general.drift_tolerance_in_seconds", &dvalue))
config.tolerance = dvalue;
/* Get the resync setting. */
if (config_lookup_float(config.cfg, "general.resync_threshold_in_seconds", &dvalue))
config.resyncthreshold = dvalue;
/* Get the verbosity setting. */
if (config_lookup_int(config.cfg, "general.log_verbosity", &value)) {
warn("The \"general\" \"log_verbosity\" setting is deprecated. Please use the "
"\"diagnostics\" \"log_verbosity\" setting instead.");
if ((value >= 0) && (value <= 3))
debuglev = value;
else
die("Invalid log verbosity setting option choice \"%d\". It should be between 0 and 3, "
"inclusive.",
value);
}
/* Get the verbosity setting. */
if (config_lookup_int(config.cfg, "diagnostics.log_verbosity", &value)) {
if ((value >= 0) && (value <= 3))
debuglev = value;
else
die("Invalid diagnostics log_verbosity setting option choice \"%d\". It should be "
"between 0 and 3, "
"inclusive.",
value);
}
/* Get the show elapsed time in debug messages setting. */
if (config_lookup_string(config.cfg, "diagnostics.log_show_time_since_startup", &str)) {
if (strcasecmp(str, "no") == 0)
config.debugger_show_elapsed_time = 0;
else if (strcasecmp(str, "yes") == 0)
config.debugger_show_elapsed_time = 1;
else
die("Invalid diagnostics log_show_time_since_startup option choice \"%s\". It should be "
"\"yes\" or \"no\"");
}
/* Get the show relative time in debug messages setting. */
if (config_lookup_string(config.cfg, "diagnostics.log_show_time_since_last_message", &str)) {
if (strcasecmp(str, "no") == 0)
config.debugger_show_relative_time = 0;
else if (strcasecmp(str, "yes") == 0)
config.debugger_show_relative_time = 1;
else
die("Invalid diagnostics log_show_time_since_last_message option choice \"%s\". It "
"should be \"yes\" or \"no\"");
}
/* Get the statistics setting. */
if (config_lookup_string(config.cfg, "diagnostics.statistics", &str)) {
if (strcasecmp(str, "no") == 0)
config.statistics_requested = 0;
else if (strcasecmp(str, "yes") == 0)
config.statistics_requested = 1;
else
die("Invalid diagnostics statistics option choice \"%s\". It should be \"yes\" or "
"\"no\"");
}
/* Get the disable_resend_requests setting. */
if (config_lookup_string(config.cfg, "diagnostics.disable_resend_requests", &str)) {
config.disable_resend_requests = 0; // this is for legacy -- only set by -t 0
if (strcasecmp(str, "no") == 0)
config.disable_resend_requests = 0;
else if (strcasecmp(str, "yes") == 0)
config.disable_resend_requests = 1;
else
die("Invalid diagnostic disable_resend_requests option choice \"%s\". It should be "
"\"yes\" "
"or \"no\"");
}
/* Get the ignore_volume_control setting. */
if (config_lookup_string(config.cfg, "general.ignore_volume_control", &str)) {
if (strcasecmp(str, "no") == 0)
config.ignore_volume_control = 0;
else if (strcasecmp(str, "yes") == 0)
config.ignore_volume_control = 1;
else
die("Invalid ignore_volume_control option choice \"%s\". It should be \"yes\" or \"no\"");
}
/* Get the optional volume_max_db setting. */
if (config_lookup_float(config.cfg, "general.volume_max_db", &dvalue)) {
// debug(1, "Max volume setting of %f dB", dvalue);
config.volume_max_db = dvalue;
config.volume_max_db_set = 1;
}
if (config_lookup_string(config.cfg, "general.run_this_when_volume_is_set", &str)) {
config.cmd_set_volume = (char *)str;
}
/* Get the playback_mode setting */
if (config_lookup_string(config.cfg, "general.playback_mode", &str)) {
if (strcasecmp(str, "stereo") == 0)
config.playback_mode = ST_stereo;
else if (strcasecmp(str, "mono") == 0)
config.playback_mode = ST_mono;
else if (strcasecmp(str, "reverse stereo") == 0)
config.playback_mode = ST_reverse_stereo;
else if (strcasecmp(str, "both left") == 0)
config.playback_mode = ST_left_only;
else if (strcasecmp(str, "both right") == 0)
config.playback_mode = ST_right_only;
else
die("Invalid playback_mode choice \"%s\". It should be \"stereo\" (default), \"mono\", "
"\"reverse stereo\", \"both left\", \"both right\"");
}
/* Get the volume control profile setting -- "standard" or "flat" */
if (config_lookup_string(config.cfg, "general.volume_control_profile", &str)) {
if (strcasecmp(str, "standard") == 0)
config.volume_control_profile = VCP_standard;
else if (strcasecmp(str, "flat") == 0)
config.volume_control_profile = VCP_flat;
else
die("Invalid volume_control_profile choice \"%s\". It should be \"standard\" (default) "
"or \"flat\"");
}
/* Get the interface to listen on, if specified Default is all interfaces */
/* we keep the interface name and the index */
if (config_lookup_string(config.cfg, "general.interface", &str))
config.interface = strdup(str);
if (config_lookup_string(config.cfg, "general.interface", &str)) {
int specified_interface_found = 0;
struct if_nameindex *if_ni, *i;
if_ni = if_nameindex();
if (if_ni == NULL) {
debug(1, "Can't get a list of interface names.");
} else {
for (i = if_ni; !(i->if_index == 0 && i->if_name == NULL); i++) {
// printf("%u: %s\n", i->if_index, i->if_name);
if (strcmp(i->if_name, str) == 0) {
config.interface_index = i->if_index;
specified_interface_found = 1;
}
}
}
if_freenameindex(if_ni);
if (specified_interface_found == 0) {
inform(
"The mdns service interface \"%s\" was not found, so the setting has been ignored.",
config.interface);
free(config.interface);
config.interface = NULL;
config.interface_index = 0;
}
}
/* Get the regtype -- the service type and protocol, separated by a dot. Default is
* "_raop._tcp" */
if (config_lookup_string(config.cfg, "general.regtype", &str))
config.regtype = strdup(str);
/* Get the volume range, in dB, that should be used If not set, it means you just use the
* range set by the mixer. */
if (config_lookup_int(config.cfg, "general.volume_range_db", &value)) {
if ((value < 30) || (value > 150))
die("Invalid volume range \"%sd\". It should be between 30 and 150 dB. Zero means use "
"the mixer's native range",
value);
else
config.volume_range_db = value;
}
/* Get the alac_decoder setting. */
if (config_lookup_string(config.cfg, "general.alac_decoder", &str)) {
if (strcasecmp(str, "hammerton") == 0)
config.use_apple_decoder = 0;
else if (strcasecmp(str, "apple") == 0) {
if ((config.decoders_supported & 1 << decoder_apple_alac) != 0)
config.use_apple_decoder = 1;
else
inform("Support for the Apple ALAC decoder has not been compiled into this version of "
"Shairport Sync. The default decoder will be used.");
} else
die("Invalid alac_decoder option choice \"%s\". It should be \"hammerton\" or \"apple\"");
}
/* Get the default latency. Deprecated! */
if (config_lookup_int(config.cfg, "latencies.default", &value))
config.userSuppliedLatency = value;
#ifdef CONFIG_METADATA
/* Get the metadata setting. */
if (config_lookup_string(config.cfg, "metadata.enabled", &str)) {
if (strcasecmp(str, "no") == 0)
config.metadata_enabled = 0;
else if (strcasecmp(str, "yes") == 0)
config.metadata_enabled = 1;
else
die("Invalid metadata enabled option choice \"%s\". It should be \"yes\" or \"no\"");
}
if (config_lookup_string(config.cfg, "metadata.include_cover_art", &str)) {
if (strcasecmp(str, "no") == 0)
config.get_coverart = 0;
else if (strcasecmp(str, "yes") == 0)
config.get_coverart = 1;
else
die("Invalid metadata include_cover_art option choice \"%s\". It should be \"yes\" or "
"\"no\"");
}
if (config_lookup_string(config.cfg, "metadata.pipe_name", &str)) {
config.metadata_pipename = (char *)str;
}
if (config_lookup_string(config.cfg, "metadata.socket_address", &str)) {
config.metadata_sockaddr = (char *)str;
}
if (config_lookup_int(config.cfg, "metadata.socket_port", &value)) {
config.metadata_sockport = value;
}
config.metadata_sockmsglength = 500;
if (config_lookup_int(config.cfg, "metadata.socket_msglength", &value)) {
config.metadata_sockmsglength = value < 500 ? 500 : value > 65000 ? 65000 : value;
}
#endif
if (config_lookup_string(config.cfg, "sessioncontrol.run_this_before_play_begins", &str)) {
config.cmd_start = (char *)str;
}
if (config_lookup_string(config.cfg, "sessioncontrol.run_this_after_play_ends", &str)) {
config.cmd_stop = (char *)str;
}
if (config_lookup_string(config.cfg, "sessioncontrol.wait_for_completion", &str)) {
if (strcasecmp(str, "no") == 0)
config.cmd_blocking = 0;
else if (strcasecmp(str, "yes") == 0)
config.cmd_blocking = 1;
else
die("Invalid session control wait_for_completion option choice \"%s\". It should be "
"\"yes\" or \"no\"");
}
if (config_lookup_string(config.cfg, "sessioncontrol.before_play_begins_returns_output",
&str)) {
if (strcasecmp(str, "no") == 0)
config.cmd_start_returns_output = 0;
else if (strcasecmp(str, "yes") == 0)
config.cmd_start_returns_output = 1;
else
die("Invalid session control before_play_begins_returns_output option choice \"%s\". It "
"should be "
"\"yes\" or \"no\"");
}
if (config_lookup_string(config.cfg, "sessioncontrol.allow_session_interruption", &str)) {
config.dont_check_timeout = 0; // this is for legacy -- only set by -t 0
if (strcasecmp(str, "no") == 0)
config.allow_session_interruption = 0;
else if (strcasecmp(str, "yes") == 0)
config.allow_session_interruption = 1;
else
die("Invalid session control allow_interruption option choice \"%s\". It should be "
"\"yes\" "
"or \"no\"");
}
if (config_lookup_int(config.cfg, "sessioncontrol.session_timeout", &value)) {
config.timeout = value;
config.dont_check_timeout = 0; // this is for legacy -- only set by -t 0
}
#ifdef CONFIG_CONVOLUTION
if (config_lookup_string(config.cfg, "dsp.convolution", &str)) {
if (strcasecmp(str, "no") == 0)
config.convolution = 0;
else if (strcasecmp(str, "yes") == 0)
config.convolution = 1;
else
die("Invalid dsp.convolution. It should be \"yes\" or \"no\"");
}
if (config_lookup_float(config.cfg, "dsp.convolution_gain", &dvalue)) {
config.convolution_gain = dvalue;
if (dvalue > 10 || dvalue < -50)
die("Invalid value \"%f\" for dsp.convolution_gain. It should be between -50 and +10 dB",
dvalue);
}
config.convolution_max_length = 8192;
if (config_lookup_int(config.cfg, "dsp.convolution_max_length", &value)) {
config.convolution_max_length = value;
if (value < 1 || value > 200000)
die("dsp.convolution_max_length must be within 1 and 200000");
}
if (config_lookup_string(config.cfg, "dsp.convolution_ir_file", &str)) {
config.convolution_ir_file = str;
convolver_init(config.convolution_ir_file, config.convolution_max_length);
}
if (config.convolution && config.convolution_ir_file == NULL) {
die("Convolution enabled but no convolution_ir_file provided");
}
#endif
if (config_lookup_string(config.cfg, "dsp.loudness", &str)) {
if (strcasecmp(str, "no") == 0)
config.loudness = 0;
else if (strcasecmp(str, "yes") == 0)
config.loudness = 1;
else
die("Invalid dsp.convolution. It should be \"yes\" or \"no\"");
}
config.loudness_reference_volume_db = -20;
if (config_lookup_float(config.cfg, "dsp.loudness_reference_volume_db", &dvalue)) {
config.loudness_reference_volume_db = dvalue;
if (dvalue > 0 || dvalue < -100)
die("Invalid value \"%f\" for dsp.loudness_reference_volume_db. It should be between "
"-100 and 0",
dvalue);
}
if (config.loudness == 1 && config_lookup_string(config.cfg, "alsa.mixer_control_name", &str))
die("Loudness activated but hardware volume is active. You must remove "
"\"alsa.mixer_control_name\" to use the loudness filter.");
} else {
if (config_error_type(&config_file_stuff) == CONFIG_ERR_FILE_IO)
debug(1, "Error reading configuration file \"%s\": \"%s\".",
config_error_file(&config_file_stuff), config_error_text(&config_file_stuff));
else {
die("Line %d of the configuration file \"%s\":\n%s", config_error_line(&config_file_stuff),
config_error_file(&config_file_stuff), config_error_text(&config_file_stuff));
}
}
#if defined(HAVE_DBUS)
/* Get the dbus service sbus setting. */
if (config_lookup_string(config.cfg, "general.dbus_service_bus", &str)) {
if (strcasecmp(str, "system") == 0)
config.dbus_service_bus_type = DBT_system;
else if (strcasecmp(str, "session") == 0)
config.dbus_service_bus_type = DBT_session;
else
die("Invalid dbus_service_bus option choice \"%s\". It should be \"system\" (default) or "
"\"session\"");
}
#endif
#if defined(HAVE_MPRIS)
/* Get the mpris service sbus setting. */
if (config_lookup_string(config.cfg, "general.mpris_service_bus", &str)) {
if (strcasecmp(str, "system") == 0)
config.mpris_service_bus_type = DBT_system;
else if (strcasecmp(str, "session") == 0)
config.mpris_service_bus_type = DBT_session;
else
die("Invalid mpris_service_bus option choice \"%s\". It should be \"system\" (default) or "
"\"session\"");
}
#endif
free(config_file_real_path);
}
// now, do the command line options again, but this time do them fully -- it's a unix convention
// that command line
// arguments have precedence over configuration file settings.
optind = argc;
for (j = 0; j < argc; j++)
if (strcmp(argv[j], "--") == 0)
optind = j;
optCon = poptGetContext(NULL, optind, (const char **)argv, optionsTable, 0);
poptSetOtherOptionHelp(optCon, "[OPTIONS]* ");
/* Now do options processing, get portname */
int tdebuglev = 0;
while ((c = poptGetNextOpt(optCon)) >= 0) {
switch (c) {
case 'v':
tdebuglev++;
break;
case 't':
if (config.timeout == 0) {
config.dont_check_timeout = 1;
config.allow_session_interruption = 1;
} else {
config.dont_check_timeout = 0;
config.allow_session_interruption = 0;
}
break;
#ifdef CONFIG_METADATA
case 'M':
config.metadata_enabled = 1;
break;
case 'g':
if (config.metadata_enabled == 0)
die("If you want to get cover art, you must also select the --metadata-pipename option.");
break;
#endif
case 'S':
if (strcmp(stuffing, "basic") == 0)
config.packet_stuffing = ST_basic;
else if (strcmp(stuffing, "soxr") == 0)
#ifdef HAVE_LIBSOXR
config.packet_stuffing = ST_soxr;
#else
die("The soxr option not available because this version of shairport-sync was built "
"without libsoxr "
"support. Change the -S option setting.");
#endif
else
die("Illegal stuffing option \"%s\" -- must be \"basic\" or \"soxr\"", stuffing);
break;
}
}
if (c < -1) {
die("%s: %s", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(c));
}
#ifdef CONFIG_METADATA
if ((config.metadata_enabled == 1) && (config.metadata_pipename == NULL))
config.metadata_pipename = strdup("/tmp/shairport-sync-metadata");
#endif
/* if the regtype hasn't been set, do it now */
if (config.regtype == NULL)
config.regtype = strdup("_raop._tcp");
if (tdebuglev != 0)
debuglev = tdebuglev;
/* if the Service Name wasn't specified, do it now */
if (raw_service_name == NULL)
raw_service_name = strdup("%H");
// now, do the substitutions in the service name
char hostname[100];
gethostname(hostname, 100);
char *i1 = str_replace(raw_service_name, "%h", hostname);
if ((hostname[0] >= 'a') && (hostname[0] <= 'z'))
hostname[0] = hostname[0] - 0x20; // convert a lowercase first letter into a capital letter
char *i2 = str_replace(i1, "%H", hostname);
char *i3 = str_replace(i2, "%v", PACKAGE_VERSION);
char *vs = get_version_string();
config.service_name = str_replace(i3, "%V", vs);
free(i1);
free(i2);
free(i3);
free(vs);
// now, check and calculate the pid directory
#ifdef USE_CUSTOM_PID_DIR
char *use_this_pid_dir = PIDDIR;
#else
char *use_this_pid_dir = "/var/run/shairport-sync";
#endif
// debug(1,"config.piddir \"%s\".",config.piddir);
if (config.piddir)
use_this_pid_dir = config.piddir;
if (use_this_pid_dir)
config.computed_piddir = strdup(use_this_pid_dir);
return optind + 1;
}
#if defined(HAVE_DBUS) || defined(HAVE_MPRIS)
GMainLoop *loop;
pthread_t dbus_thread;
void *dbus_thread_func(__attribute__((unused)) void *arg) {
loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(loop);
return NULL;
}
#endif
void signal_setup(void) {
// mask off all signals before creating threads.
// this way we control which thread gets which signals.
// for now, we don't care which thread gets the following.
sigset_t set;
sigfillset(&set);
sigdelset(&set, SIGINT);
sigdelset(&set, SIGTERM);
sigdelset(&set, SIGHUP);
sigdelset(&set, SIGSTOP);
sigdelset(&set, SIGCHLD);
sigdelset(&set, SIGUSR2);
pthread_sigmask(SIG_BLOCK, &set, NULL);
// SIGUSR1 is used to interrupt a thread if blocked in pselect
pthread_sigmask(SIG_SETMASK, NULL, &pselect_sigset);
sigdelset(&pselect_sigset, SIGUSR1);
// setting this to SIG_IGN would prevent signalling any threads.
struct sigaction sa;