/*
- * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2008 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 */
+/** \file server.c Paraslash's main server. */
-/** \mainpage Paraslash API Reference
+/**
+ * \mainpage Paraslash API Reference
+ *
+ * Starting points for getting an overview are
+ *
+ * probably:
+ *
+ * - The main programs: \ref server.c, \ref audiod.c, \ref client.c,
+ * \ref audioc.c, \ref fsck.c,
+ * - Server: \ref server_command, \ref sender,
+ * - Audio file selector: \ref audio_format_handler, \ref mood, \ref afs_table,
+ * - Client: \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.
+ * The gory details, listed by topic:
+ *
+ * - Audio format handlers: \ref mp3_afh.c, \ref ogg_afh.c, \ref aac_afh.c,
+ * - Decoders: \ref mp3dec.c, \ref oggdec.c, \ref aacdec.c,
+ * - Volume normalizer: \ref compress.c,
+ * - Output: \ref alsa_write.c, \ref osx_write.c,
+ * - http: \ref http_recv.c, \ref http_send.c,
+ * - ortp: \ref ortp_recv.c, \ref ortp_send.c,
+ * - dccp: \ref dccp_recv.c, \ref dccp_send.c,
+ * - Audio file selector: \ref afs.c, \ref aft.c, \ref mood.c,
+ * - Afs structures: \ref afs_table, \ref audio_file_data,
+ * \ref afs_info \ref afh_info,
+ * - Afs tables: \ref aft.c, \ref mood.c, \ref playlist.c,
+ * \ref attribute.c, \ref score.c,
+ * - The virtual streaming system: \ref vss.c, \ref chunk_queue.c.
+ *
+ * Lower levels:
+ *
+ * - Scheduling: \ref sched.c, \ref sched.h,
+ * - Networking: \ref net.c,
+ * - File descriptors: \ref fd.c,
+ * - Signals: \ref signal.c,
+ * - Daemons: \ref daemon.c,
+ * - Strings: \ref string.c, \ref string.h,
+ * - Time: \ref time.c,
+ * - Spawning processes: \ref exec.c,
+ * - Inter process communication: \ref ipc.c,
+ * - The object storage layer: \ref osl.c,
+ * - Blob tables: \ref blob.c,
+ * - The error subssystem: \ref error.h.
+ * - Access control for paraslash senders: \ref acl.c, \ref acl.h.
+ *
+ * Low-level data structures:
+ *
+ * - Doubly linked lists: \ref list.h,
+ * - Red-black trees: \ref rbtree.h, \ref rbtree.c,
+ * - Ring buffer: \ref ringbuffer.c, \ref ringbuffer.h,
+ * - Hashing: \ref hash.h, \ref sha1.h, \ref sha1.c,
+ * - Crypto: \ref crypt.c.
*
*/
+#include <signal.h>
+#include <sys/types.h>
+#include <dirent.h>
-
+#include "para.h"
+#include "error.h"
#include "server.cmdline.h"
-#include "db.h"
-#include "server.h"
+#include "afh.h"
+#include "string.h"
#include "afs.h"
+#include "server.h"
+#include "vss.h"
#include "config.h"
#include "close_on_fork.h"
+#include "list.h"
#include "send.h"
-#include "error.h"
#include "net.h"
#include "daemon.h"
-#include "string.h"
#include "ipc.h"
+#include "fd.h"
+#include "sched.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.c. command.c and to all selectors */
+/**
+ * Pointer to shared memory area for communication between para_server
+ * and its children. Exported to vss.c. command.c and to afs.
+ */
struct misc_meta_data *mmd;
-/** the configuration of para_server
+
+/**
+ * the configuration of para_server
*
- * It also contains the options for all audio file selectors and all supported
- * senders.
-*/
-struct gengetopt_args_info conf;
-char *user_list = NULL;
+ * It also contains the options for the audio file selector, 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 audio file selectors */
-struct audio_file_selector dblist[] = {
- {
- .name = "random",
- .init = random_dbtool_init,
- .update_audio_file = NULL,
- },
- {
- .name = "plm",
- .init = plm_dbtool_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#ifdef HAVE_MYSQL
- {
- .name = "mysql",
- .init = mysql_dbtool_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#endif
- {
- .name = NULL,
- }
-};
/** the list of supported senders */
struct sender senders[] = {
.name = "http",
.init = http_send_init,
},
+ {
+ .name = "dccp",
+ .init = dccp_send_init,
+ },
#ifdef HAVE_ORTP
{
.name = "ortp",
* \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);
fprintf(outfd, "%i: ", ll);
mypid = getpid();
if (conf.loglevel_arg <= INFO)
- fprintf(outfd, "(%d) ", mypid);
+ fprintf(outfd, "(%d) ", (int)mypid);
va_start(argp, fmt);
vfprintf(outfd, fmt, argp);
va_end(argp);
goto err_out;
mmd_mutex = ret;
- mmd->dbt_num = 0;
mmd->num_played = 0;
mmd->num_commands = 0;
mmd->events = 0;
mmd->num_connects = 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;
return;
err_out:
- PARA_EMERG_LOG("%s", PARA_STRERROR(-ret));
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
/**
* lock the shared memory area containing the mmd struct
*
- * \sa semop(2), struct misc_meta_data
+ * \sa semop(2), struct misc_meta_data.
*/
void mmd_lock(void)
{
char *cf;
if (conf.config_file_given)
- cf = conf.config_file_arg;
+ cf = para_strdup(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 */
- if (!conf.logfile_given && conf.daemon_given) {
- ret = -1;
- PARA_EMERG_LOG("%s", "daemon, but no log file\n");
- goto out;
- }
if (conf.logfile_given)
logfile = open_log(conf.logfile_arg);
ret = 1;
free(home);
if (ret > 0)
return;
- free(user_list);
- user_list = NULL;
+ free(user_list_file);
+ user_list_file = NULL;
exit(EXIT_FAILURE);
}
static void setup_signal_handling(void)
{
- 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);
- if (ret != 5) {
- PARA_EMERG_LOG("%s", "could not install signal handlers\n");
- exit(EXIT_FAILURE);
- }
-}
-
-static void init_dbtool(void)
-{
- int i, ret;
-
- mmd->dbt_change = -1; /* no change nec., set to new dbt num by com_cdt */
- if (!conf.selector_given)
- goto random;
- for (i = 0; dblist[i].name; i++) {
- if (strcmp(dblist[i].name, conf.selector_arg))
- continue;
- PARA_NOTICE_LOG("initializing %s audio file selector\n",
- dblist[i].name);
- ret = dblist[i].init(&dblist[i]);
- if (ret < 0) {
- PARA_WARNING_LOG("%s", PARA_STRERROR(-ret));
- break;
- }
- mmd->dbt_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 */
+ signal_pipe = para_signal_init(); /* always successful */
+
+ PARA_NOTICE_LOG("setting up signal handlers\n");
+ if (para_install_sighandler(SIGINT) < 0)
+ goto err;
+ if (para_install_sighandler(SIGTERM) < 0)
+ goto err;
+ if (para_install_sighandler(SIGHUP) < 0)
+ goto err;
+ if (para_install_sighandler(SIGCHLD) < 0)
+ goto err;
+ if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
+ goto err;
+ if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
+ goto err;
+ add_close_on_fork_list(signal_pipe);
+ return;
+err:
+ PARA_EMERG_LOG("could not install signal handlers\n");
+ exit(EXIT_FAILURE);
}
static unsigned init_network(void)
{
- int sockfd = init_tcp_socket(conf.port_arg);
+ int fd, ret = para_listen(AF_UNSPEC, IPPROTO_TCP, conf.port_arg);
- if (sockfd < 0)
- exit(EXIT_FAILURE);
- return sockfd;
+ if (ret < 0)
+ goto err;
+ fd = ret;
+ ret = mark_fd_nonblocking(fd);
+ if (ret < 0)
+ goto err;
+ add_close_on_fork_list(fd); /* child doesn't need the listener */
+ 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);
unsigned int seed;
+ int fd, ret = para_open("/dev/urandom", O_RDONLY, 0);
- fd = open("/dev/random", O_RDONLY);
- if (fd < 0)
+ if (ret < 0)
+ goto err;
+ fd = ret;
+ ret = read(fd, &seed, sizeof(seed));
+ if (ret < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
goto out;
- ret = -2;
- if (read(fd, &seed, len) != len)
+ }
+ if (ret != sizeof(seed)) {
+ ret = -ERRNO_TO_PARA_ERROR(EIO);
goto out;
+ }
srandom(seed);
ret = 1;
out:
- if (fd >= 0)
- close(fd);
- if (ret > 0)
+ close(fd);
+ if (ret >= 0)
return;
- PARA_EMERG_LOG("can not seed pseudo random generator (ret = %d)\n",
- ret);
+err:
+ PARA_EMERG_LOG("can not seed pseudo random number generator: %s\n",
+ para_strerror(-ret));
exit(EXIT_FAILURE);
}
-static unsigned do_inits(int argc, char **argv)
+uint32_t afs_socket_cookie;
+int afs_socket;
+static pid_t afs_pid;
+
+static void init_afs(void)
+{
+ int ret, afs_server_socket[2];
+
+ ret = socketpair(PF_UNIX, SOCK_DGRAM, 0, afs_server_socket);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
+ afs_socket_cookie = para_random((uint32_t)-1);
+ afs_pid = fork();
+ if (afs_pid < 0)
+ exit(EXIT_FAILURE);
+ if (!afs_pid) { /* child (afs) */
+ close(afs_server_socket[0]);
+ afs_init(afs_socket_cookie, afs_server_socket[1]);
+ }
+ close(afs_server_socket[1]);
+ afs_socket = afs_server_socket[0];
+ ret = mark_fd_nonblocking(afs_socket);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
+ add_close_on_fork_list(afs_socket);
+ PARA_INFO_LOG("afs_socket: %d, afs_socket_cookie: %u\n", afs_socket,
+ (unsigned) afs_socket_cookie);
+}
+
+static unsigned server_init(int argc, char **argv)
{
/* connector's address information */
int sockfd;
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();
+ PARA_NOTICE_LOG("initializing audio format handlers\n");
+ afh_init();
+ PARA_NOTICE_LOG("initializing virtual streaming system\n");
mmd->server_pid = getpid();
setup_signal_handling();
+ PARA_NOTICE_LOG("initializing the audio file selector\n");
+ init_afs();
+ vss_init();
mmd_lock();
/* init network socket */
- PARA_NOTICE_LOG("%s", "initializing tcp command socket\n");
+ PARA_NOTICE_LOG("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");
+ PARA_NOTICE_LOG("server init complete\n");
return sockfd;
}
-static void handle_dbt_change(void)
-{
- int ret, old = mmd->dbt_num, new = mmd->dbt_change;
-
- dblist[old].shutdown();
- ret = dblist[new].init(&dblist[new]);
- mmd->dbt_change = -1; /* reset */
- if (ret >= 0) {
- mmd->dbt_num = new;
- return;
- }
- /* init failed */
- PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
- dblist[0].init(&dblist[0]);
- mmd->dbt_num = 0;
-}
-
/*
* called when server gets SIGHUP or when client invokes hup command.
*/
static void handle_sighup(void)
{
- PARA_NOTICE_LOG("%s", "SIGHUP\n");
+ PARA_NOTICE_LOG("SIGHUP\n");
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 selector */
- handle_dbt_change(); /* reload selector */
+ init_user_list(user_list_file); /* reload user list */
+ if (afs_pid)
+ kill(afs_pid, SIGHUP);
}
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);
+ PARA_DEBUG_LOG("%d events, forcing status update\n",
+ mmd->events);
killpg(0, SIGUSR1);
}
}
-/*
- * 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;
+ char *peer_name;
+ int i, max_fileno, ret;
pid_t chld_pid;
fd_set rfds, wfds;
struct timeval *timeout;
valid_fd_012();
- sockfd = do_inits(argc, argv);
+ sockfd = server_init(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(&rfds, &wfds, &max_fileno);
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);
- }
- if (dblist[mmd->dbt_num].pre_select) {
- ret = dblist[mmd->dbt_num].pre_select(&rfds, &wfds);
- max_fileno = MAX(max_fileno, ret);
+ senders[i].pre_select(&max_fileno, &rfds, &wfds);
}
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 (dblist[mmd->dbt_num].post_select)
- dblist[mmd->dbt_num].post_select(&rfds, &wfds);
- if (ret < 0 && err == EINTR)
- goto repeat;
- if (ret < 0) {
- PARA_CRIT_LOG("select error (%s)\n", strerror(err));
+ vss_post_select(&rfds, &wfds);
+ if (ret < 0)
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;
+ pid_t pid;
sig = para_next_signal();
switch (sig) {
case SIGHUP:
handle_sighup();
break;
case SIGCHLD:
- para_reap_children();
+ for (;;) {
+ ret = para_reap_child(&pid);
+ if (ret <= 0)
+ break;
+ if (pid != afs_pid)
+ continue;
+ PARA_EMERG_LOG("fatal: afs died\n");
+ goto genocide;
+ }
break;
/* die on sigint/sigterm. Kill all children too. */
case SIGINT:
case SIGTERM:
PARA_EMERG_LOG("terminating on signal %d\n", sig);
+genocide:
kill(0, SIGTERM);
- dblist[mmd->dbt_num].shutdown();
mutex_destroy(mmd_mutex);
shm_detach(mmd);
shm_destroy(mmd_shm_id);
+
exit(EXIT_FAILURE);
}
}
if (!FD_ISSET(sockfd, &rfds))
goto repeat;
- new_fd = para_accept(sockfd, &their_addr, sizeof(struct sockaddr_in));
+ new_fd = para_accept(sockfd, NULL, 0);
if (new_fd < 0)
goto repeat;
- PARA_INFO_LOG("got connection from %s, forking\n",
- inet_ntoa(their_addr.sin_addr));
+ peer_name = remote_name(new_fd);
+ PARA_INFO_LOG("got connection from %s, forking\n", peer_name);
mmd->num_connects++;
mmd->active_connections++;
random();
chld_pid = fork();
if (chld_pid < 0) {
- PARA_CRIT_LOG("%s", "fork failed\n");
+ PARA_CRIT_LOG("fork failed\n");
goto repeat;
}
if (chld_pid) {
}
alarm(ALARM_TIMEOUT);
close_listed_fds();
- close(sockfd); /* child doesn't need the listener */
+ para_signal_shutdown();
/*
* put info on who we are serving into argv[0] to make
* client ip visible in top/ps
*/
for (i = argc - 1; i >= 0; i--)
memset(argv[i], 0, strlen(argv[i]));
- sprintf(argv[0], "para_server (serving %s)",
- inet_ntoa(their_addr.sin_addr));
- return handle_connect(new_fd, &their_addr);
+ sprintf(argv[0], "para_server (serving %s)", peer_name);
+ return handle_connect(new_fd, peer_name);
}
projects / paraslash.git / blobdiff