/*
- * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file server.c Paraslash's main server */
/** \mainpage Paraslash API Reference
*
- * Good starting points for reading are probably \ref dbtool, \ref sender,
- * \ref receiver, \ref receiver_node, \ref filter, \ref filter_node.
+ * Good starting points for reading are probably \ref audio_file_selector,
+ * \ref sender, \ref receiver, \ref receiver_node, \ref filter, \ref
+ * filter_node.
*
*/
#include "server.cmdline.h"
-#include "db.h"
-#include "server.h"
#include "afs.h"
+#include "server.h"
+#include "vss.h"
#include "config.h"
#include "close_on_fork.h"
-#include <sys/mman.h> /* MAP_SHARED, PROT_READ, PROT_WRITE */
#include "send.h"
#include "error.h"
#include "net.h"
#include "daemon.h"
#include "string.h"
+#include "ipc.h"
+#include "fd.h"
+#include "signal.h"
+#include "user_list.h"
/** define the array of error lists needed by para_server */
INIT_SERVER_ERRLISTS;
/** shut down non-authorized connections after that many seconds */
#define ALARM_TIMEOUT 10
-/* these are exported to afs/command/dbtool */
+/**
+ * pointer to shared memory area for communication between para_server
+ * and its children. exported to vss.c. command.c and to all selectors.
+ */
struct misc_meta_data *mmd;
-/** the configuration of para_server
+
+/**
+ * the configuration of para_server
*
- * It also contains the options for all database tools and all supported
- * senders.
-*/
-struct gengetopt_args_info conf;
-char *user_list = NULL;
+ * It also contains the options for all audio file selectors, audio format handler
+ * and all supported senders.
+ */
+struct server_args_info conf;
+
+/** the file containing user information (public key, permissions) */
+char *user_list_file = NULL;
+
+extern void dccp_send_init(struct sender *);
extern void http_send_init(struct sender *);
extern void ortp_send_init(struct sender *);
-extern struct audio_format afl[];
-/** the list of supported database tools */
-struct dbtool dblist[] = {
+/* TODO: This is better handled by autoconf */
+/** the list of supported audio file selectors */
+struct audio_file_selector selectors[] = {
{
.name = "random",
- .init = random_dbtool_init,
+ .init = random_selector_init,
.update_audio_file = NULL,
},
{
- .name = "plm",
- .init = plm_dbtool_init,
+ .name = "playlist",
+ .init = playlist_selector_init,
.update_audio_file = NULL,
.pre_select = NULL,
.post_select = NULL,
#ifdef HAVE_MYSQL
{
.name = "mysql",
- .init = mysql_dbtool_init,
+ .init = mysql_selector_init,
.update_audio_file = NULL,
.pre_select = NULL,
.post_select = NULL,
.name = "http",
.init = http_send_init,
},
+ {
+ .name = "dccp",
+ .init = dccp_send_init,
+ },
#ifdef HAVE_ORTP
{
.name = "ortp",
/* global variables for server-internal use */
static FILE *logfile;
-static int mmd_semid;
+static int mmd_mutex, mmd_shm_id;
static int signal_pipe;
/**
* \param ll the log level
* \param fmt the format string describing the log message
*/
-void para_log(int ll, char* fmt,...)
+void para_log(int ll, const char* fmt,...)
{
va_list argp;
FILE *outfd;
if (ll < conf.loglevel_arg)
return;
- if (!logfile) {
- if (ll < WARNING)
- outfd = stdout;
- else
- outfd = stderr;
- } else
- outfd = logfile;
- if (conf.daemon_given && !logfile)
- return;
+ outfd = logfile? logfile : stderr;
time(&t1);
tm = localtime(&t1);
strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
va_end(argp);
}
-
/*
- * setup shared memory area and get semaphore for locking
+ * setup shared memory area and get mutex for locking
*/
static void shm_init(void)
{
- int fd;
- caddr_t area;
+ void *shm;
+ int ret = shm_new(sizeof(struct misc_meta_data));
- if ((fd = open("/dev/zero", O_RDWR)) < 0) {
- PARA_EMERG_LOG("%s", "failed to open /dev/zero\n");
- exit(EXIT_FAILURE);
- }
- if ((area = mmap(0, sizeof(struct misc_meta_data),
- PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0)) == (caddr_t) - 1) {
- PARA_EMERG_LOG("%s", "mmap error\n");
- exit(EXIT_FAILURE);
- }
- close(fd); /* we dont need /dev/zero anymore */
- mmd = (struct misc_meta_data *)area;
+ if (ret < 0)
+ goto err_out;
- mmd->dbt_num = 0;
+ ret = shm_attach(ret, ATTACH_RW, &shm);
+ if (ret < 0)
+ goto err_out;
+ mmd = shm;
+ mmd_shm_id = ret;
+
+ ret = mutex_new();
+ if (ret < 0)
+ goto err_out;
+ mmd_mutex = ret;
+
+ mmd->selector_num = 0;
mmd->num_played = 0;
mmd->num_commands = 0;
mmd->events = 0;
mmd->active_connections = 0;
strcpy(mmd->filename, "(none)");
mmd->audio_format = -1;
- mmd->afs_status_flags = AFS_NEXT;
- mmd->new_afs_status_flags = AFS_NEXT;
+ mmd->vss_status_flags = VSS_NEXT;
+ mmd->new_vss_status_flags = VSS_NEXT;
mmd->sender_cmd_data.cmd_num = -1;
-
- mmd_semid = semget(42, 1, IPC_CREAT | 0666);
- if (mmd_semid == -1) {
- PARA_EMERG_LOG("%s", "semget failed\n");
- exit(EXIT_FAILURE);
- }
-}
-
-static void do_semop(struct sembuf *sops, int num)
-{
- if (semop(mmd_semid, sops, num) >= 0)
- return;
- PARA_WARNING_LOG("semop failed (%s), retrying\n", strerror(errno));
- while (semop(mmd_semid, sops, num) < 0)
- ; /* nothing */
+ return;
+err_out:
+ PARA_EMERG_LOG("%s", PARA_STRERROR(-ret));
+ exit(EXIT_FAILURE);
}
/**
*/
void mmd_lock(void)
{
- struct sembuf sops[2] = {
- {
- .sem_num = 0,
- .sem_op = 0,
- .sem_flg = SEM_UNDO
- },
- {
- .sem_num = 0,
- .sem_op = 1,
- .sem_flg = SEM_UNDO
- }
- };
- do_semop(sops, 2);
+ mutex_lock(mmd_mutex);
}
/**
*
* \sa semop(2), struct misc_meta_data
*/
+
void mmd_unlock(void)
{
- struct sembuf sops[1] = {
- {
- .sem_num = 0,
- .sem_op = -1,
- .sem_flg = SEM_UNDO
- },
- };
- do_semop(sops, 1);
+ mutex_unlock(mmd_mutex);
}
static void parse_config(int override)
cf = conf.config_file_arg;
else
cf = make_message("%s/.paraslash/server.conf", home);
- free(user_list);
+ free(user_list_file);
if (!conf.user_list_given)
- user_list = make_message("%s/.paraslash/server.users", home);
+ user_list_file = make_message("%s/.paraslash/server.users", home);
else
- user_list = para_strdup(conf.user_list_arg);
+ user_list_file = para_strdup(conf.user_list_arg);
ret = stat(cf, &statbuf);
if (ret && conf.config_file_given) {
ret = -1;
}
if (!ret) {
int tmp = conf.daemon_given;
- cmdline_parser_configfile(cf, &conf, override, 0, 0);
+ struct server_cmdline_parser_params params = {
+ .override = override,
+ .initialize = 0,
+ .check_required = 0,
+ .check_ambiguity = 0
+ };
+ server_cmdline_parser_config_file(cf, &conf, ¶ms);
conf.daemon_given = tmp;
}
/* logfile */
free(home);
if (ret > 0)
return;
- free(user_list);
- user_list = NULL;
+ free(user_list_file);
+ user_list_file = NULL;
exit(EXIT_FAILURE);
}
int ret = 0;
signal_pipe = para_signal_init();
-// fcntl(signal_pipe, F_SETFL, O_NONBLOCK);
PARA_NOTICE_LOG("%s", "setting up signal handlers\n");
ret += para_install_sighandler(SIGINT);
ret += para_install_sighandler(SIGTERM);
ret += para_install_sighandler(SIGHUP);
ret += para_install_sighandler(SIGCHLD);
+ ret += para_install_sighandler(SIGUSR1);
signal(SIGPIPE, SIG_IGN);
- signal(SIGUSR1, SIG_IGN);
- if (ret != 4) {
+ if (ret != 5) {
PARA_EMERG_LOG("%s", "could not install signal handlers\n");
exit(EXIT_FAILURE);
}
}
-static void init_dbtool(void)
+static void init_selector(void)
{
- int i;
+ int i, ret;
- mmd->dbt_change = -1; /* no change nec., set to new dbt num by com_cdt */
- if (!dblist[1].name)
- goto random;
- if (conf.dbtool_given) {
- for (i = 0; dblist[i].name; i++) {
- if (strcmp(dblist[i].name, conf.dbtool_arg))
- continue;
- PARA_NOTICE_LOG("initializing %s database tool\n",
- dblist[i].name);
- if (dblist[i].init(&dblist[i]) < 0) {
- PARA_WARNING_LOG("init %s failed",
- dblist[i].name);
- goto random;
- }
- mmd->dbt_num = i;
- return;
- }
- PARA_WARNING_LOG("%s", "no such dbtool, switching to random\n");
+ mmd->selector_change = -1; /* no change nec., set to new num by com_chs */
+ if (!conf.selector_given)
goto random;
- }
- /* use the first dbtool that works
- * (assuming that random always works)
- */
- for (i = 1; dblist[i].name; i++) {
- int ret = dblist[i].init(&dblist[i]);
- if (ret >= 0) {
- PARA_INFO_LOG("initialized %s\n", dblist[i].name);
- mmd->dbt_num = i;
- return;
+ for (i = 0; selectors[i].name; i++) {
+ if (strcmp(selectors[i].name, conf.selector_arg))
+ continue;
+ PARA_NOTICE_LOG("initializing %s audio file selector\n",
+ selectors[i].name);
+ ret = selectors[i].init(&selectors[i]);
+ if (ret < 0) {
+ PARA_WARNING_LOG("%s", PARA_STRERROR(-ret));
+ break;
}
- PARA_CRIT_LOG("%s init failed: %s\n", dblist[i].name,
- PARA_STRERROR(-ret));
+ mmd->selector_num = i;
+ return;
}
+ PARA_WARNING_LOG("%s", "falling back to the random selector\n");
random:
- mmd->dbt_num = 0;
- dblist[0].init(&dblist[0]); /* always successful */
+ mmd->selector_num = 0;
+ selectors[0].init(&selectors[0]); /* always successful */
}
static unsigned init_network(void)
{
- int sockfd = init_tcp_socket(conf.port_arg);
-
- if (sockfd < 0)
- exit(EXIT_FAILURE);
- return sockfd;
+ int fd, ret = init_tcp_socket(conf.port_arg);
+
+ if (ret < 0)
+ goto err;
+ fd = ret;
+ ret = mark_fd_nonblock(fd);
+ if (ret < 0)
+ goto err;
+ return fd;
+err:
+ PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ exit(EXIT_FAILURE);
}
static void init_random_seed(void)
{
- int fd, ret = -1, len = sizeof(unsigned int);
+ int fd, ret = -1;
unsigned int seed;
+ size_t len = sizeof(unsigned int);
- fd = open("/dev/random", O_RDONLY);
+ fd = open("/dev/urandom", O_RDONLY);
if (fd < 0)
goto out;
ret = -2;
init_random_seed();
/* parse command line options */
- cmdline_parser(argc, argv, &conf);
- para_drop_privileges(conf.user_arg);
+ server_cmdline_parser(argc, argv, &conf);
+ HANDLE_VERSION_FLAG("server", conf);
+ para_drop_privileges(conf.user_arg, conf.group_arg);
/* parse config file, open log and set defaults */
parse_config(0);
log_welcome("para_server", conf.loglevel_arg);
shm_init(); /* init mmd struct */
server_uptime(UPTIME_SET); /* reset server uptime */
+ init_user_list(user_list_file);
/* become daemon */
if (conf.daemon_given)
daemon_init();
- init_dbtool();
- PARA_NOTICE_LOG("%s", "initializing audio file sender\n");
- /* audio file sender */
- afs_init();
+ init_selector();
+// PARA_ERROR_LOG("num: %d\n", mmd->selector_num);
+ PARA_NOTICE_LOG("%s", "initializing virtual streaming system\n");
+ vss_init();
mmd->server_pid = getpid();
setup_signal_handling();
mmd_lock();
/* init network socket */
PARA_NOTICE_LOG("%s", "initializing tcp command socket\n");
sockfd = init_network();
- if (conf.autoplay_given) {
- mmd->afs_status_flags |= AFS_PLAYING;
- mmd->new_afs_status_flags |= AFS_PLAYING;
- }
PARA_NOTICE_LOG("%s", "init complete\n");
return sockfd;
}
-static void handle_dbt_change(void)
+static void change_selector(void)
{
- int ret, old = mmd->dbt_num, new = mmd->dbt_change;
+ int ret, old = mmd->selector_num, new = mmd->selector_change;
- dblist[old].shutdown();
- ret = dblist[new].init(&dblist[new]);
- mmd->dbt_change = -1; /* reset */
+ selectors[old].shutdown();
+ ret = selectors[new].init(&selectors[new]);
+ mmd->selector_change = -1; /* reset */
if (ret >= 0) {
- mmd->dbt_num = new;
+ mmd->selector_num = new;
return;
}
/* init failed */
- PARA_ERROR_LOG("%s -- switching to the random dbtool\n", PARA_STRERROR(-ret));
- dblist[0].init(&dblist[0]);
- mmd->dbt_num = 0;
+ PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
+ selectors[0].init(&selectors[0]);
+ mmd->selector_num = 0;
}
/*
close_log(logfile); /* gets reopened if necessary by parse_config */
logfile = NULL;
parse_config(1); /* reopens log */
- mmd->dbt_change = mmd->dbt_num; /* do not change dbtool */
- handle_dbt_change(); /* force reloading dbtool */
+ mmd->selector_change = mmd->selector_num; /* do not change selector.. */
+ change_selector(); /* .. just reload */
+ init_user_list(user_list_file); /* reload user list */
}
static void status_refresh(void)
if (prev_events != mmd->events)
goto out;
- if (mmd->new_afs_status_flags != mmd->afs_status_flags)
+ if (mmd->new_vss_status_flags != mmd->vss_status_flags)
goto out;
if (uptime / 60 != prev_uptime / 60)
goto out;
out:
prev_uptime = uptime;
prev_events = mmd->events;
- mmd->afs_status_flags = mmd->new_afs_status_flags;
+ mmd->vss_status_flags = mmd->new_vss_status_flags;
if (ret) {
PARA_DEBUG_LOG("%d events, forcing status update, af = %d\n",
mmd->events, mmd->audio_format);
}
}
-/*
- * MAIN
+/**
+ * the main function of para_server
+ *
+ * \param argc usual argument count
+ * \param argv usual argument vector
+ *
+ * \return EXIT_SUCCESS or EXIT_FAILURE
+ *
*/
int main(int argc, char *argv[])
{
/* listen on sock_fd, new connection on new_fd */
int sockfd, new_fd;
struct sockaddr_in their_addr;
- int err, i, max_fileno, ret;
+ int i, max_fileno, ret;
pid_t chld_pid;
fd_set rfds, wfds;
struct timeval *timeout;
valid_fd_012();
sockfd = do_inits(argc, argv);
repeat:
- /* check socket and signal pipe in any case */
FD_ZERO(&rfds);
FD_ZERO(&wfds);
- FD_SET(sockfd, &rfds);
- max_fileno = sockfd;
- FD_SET(signal_pipe, &rfds);
- max_fileno = MAX(max_fileno, signal_pipe);
-
- timeout = afs_preselect();
+ max_fileno = -1;
+ /* check socket and signal pipe in any case */
+ para_fd_set(sockfd, &rfds, &max_fileno);
+ para_fd_set(signal_pipe, &rfds, &max_fileno);
+ timeout = vss_preselect();
status_refresh();
for (i = 0; senders[i].name; i++) {
if (senders[i].status != SENDER_ON)
continue;
if (!senders[i].pre_select)
continue;
- senders[i].pre_select(mmd->audio_format >= 0?
- &afl[mmd->audio_format] : NULL,
- &max_fileno,
- &rfds, &wfds);
+ senders[i].pre_select( &max_fileno, &rfds, &wfds);
+ }
+ if (selectors[mmd->selector_num].pre_select) {
+ ret = selectors[mmd->selector_num].pre_select(&rfds, &wfds);
+ max_fileno = PARA_MAX(max_fileno, ret);
}
mmd_unlock();
-// PARA_DEBUG_LOG("%s: select (max = %i)\n", __func__, max_fileno);
- ret = select(max_fileno + 1, &rfds, &wfds, NULL, timeout);
- err = errno;
- //PARA_DEBUG_LOG("%s: select returned %i\n", __func__, ret);
+ ret = para_select(max_fileno + 1, &rfds, &wfds, timeout);
mmd_lock();
- if (mmd->dbt_change >= 0)
- handle_dbt_change();
- if (ret < 0 && err == EINTR)
+ if (mmd->selector_change >= 0)
+ change_selector();
+ if (selectors[mmd->selector_num].post_select)
+ selectors[mmd->selector_num].post_select(&rfds, &wfds);
+ if (ret < 0)
goto repeat;
- if (ret < 0) {
- PARA_CRIT_LOG("select error (%s)\n", strerror(err));
- goto repeat;
- }
for (i = 0; senders[i].name; i++) {
if (senders[i].status != SENDER_ON)
continue;
if (!senders[i].post_select)
continue;
- senders[i].post_select(mmd->audio_format >= 0?
- &afl[mmd->audio_format] : NULL,
- &rfds, &wfds);
- }
- if (!ret) {
- afs_send_chunk();
- status_refresh();
+ senders[i].post_select(&rfds, &wfds);
}
+ vss_send_chunk();
+ status_refresh();
if (FD_ISSET(signal_pipe, &rfds)) {
int sig;
sig = para_next_signal();
case SIGTERM:
PARA_EMERG_LOG("terminating on signal %d\n", sig);
kill(0, SIGTERM);
+ selectors[mmd->selector_num].shutdown();
+ mutex_destroy(mmd_mutex);
+ shm_detach(mmd);
+ shm_destroy(mmd_shm_id);
exit(EXIT_FAILURE);
}
}
projects / paraslash.git / blobdiff