* 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.
+ *
+ *
+ * The gory details, listed by topic:
*
- * Good starting points for reading are probably \ref audio_file_selector,
- * \ref sender, \ref receiver, \ref receiver_node, \ref filter, \ref
- * filter_node.
+ * - 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.
+ *
+ * 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 <dirent.h>
#include "para.h"
+#include "error.h"
#include "server.cmdline.h"
-#include "afs_common.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 "send.h"
-#include "error.h"
#include "net.h"
#include "daemon.h"
-#include "string.h"
#include "ipc.h"
#include "fd.h"
#include "list.h"
#include "sched.h"
#include "signal.h"
#include "user_list.h"
-#include "afs.h"
/** define the array of error lists needed by para_server */
INIT_SERVER_ERRLISTS;
#define ALARM_TIMEOUT 10
/**
- * pointer to shared memory area for communication between para_server
- * and its children. exported to vss.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
*
- * It also contains the options for all audio file selectors, audio format handler
- * and all supported senders.
+ * It also contains the options for the audio file selector, audio format
+ * handler and all supported senders.
*/
struct server_args_info conf;
extern void http_send_init(struct sender *);
extern void ortp_send_init(struct sender *);
-/* TODO: This is better handled by autoconf */
-/** the list of supported audio file selectors */
-struct audio_file_selector selectors[] = {
- {
- .name = "random",
- .init = random_selector_init,
- .update_audio_file = NULL,
- },
- {
- .name = "playlist",
- .init = playlist_selector_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#ifdef HAVE_MYSQL
- {
- .name = "mysql",
- .init = mysql_selector_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#endif
- {
- .name = NULL,
- }
-};
-
/** the list of supported senders */
struct sender senders[] = {
{
goto err_out;
mmd_mutex = ret;
- mmd->selector_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->vss_status_flags = VSS_NEXT;
mmd->new_vss_status_flags = VSS_NEXT;
mmd->sender_cmd_data.cmd_num = -1;
/**
* 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_file);
int ret = 0;
signal_pipe = para_signal_init();
- PARA_NOTICE_LOG("%s", "setting up signal handlers\n");
+
+ PARA_NOTICE_LOG("setting up signal handlers\n");
ret += para_install_sighandler(SIGINT);
ret += para_install_sighandler(SIGTERM);
ret += para_install_sighandler(SIGHUP);
PARA_EMERG_LOG("%s", "could not install signal handlers\n");
exit(EXIT_FAILURE);
}
-}
-
-static void init_selector(void)
-{
- int i, ret;
-
- mmd->selector_change = -1; /* no change nec., set to new num by com_chs */
- if (!conf.selector_given)
- goto random;
- 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;
- }
- mmd->selector_num = i;
- return;
- }
- PARA_WARNING_LOG("%s", "falling back to the random selector\n");
-random:
- mmd->selector_num = 0;
- selectors[0].init(&selectors[0]); /* always successful */
+ add_close_on_fork_list(signal_pipe);
}
static unsigned init_network(void)
{
- int fd, ret = init_tcp_socket(conf.port_arg);
+ int fd, ret = para_listen(AF_UNSPEC, IPPROTO_TCP, conf.port_arg);
if (ret < 0)
goto err;
fd = ret;
- ret = mark_fd_nonblock(fd);
+ 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));
}
uint32_t afs_socket_cookie;
-static int afs_socket;
+int afs_socket;
static pid_t afs_pid;
static void init_afs(void)
}
close(afs_server_socket[1]);
afs_socket = afs_server_socket[0];
- ret = mark_fd_nonblock(afs_socket);
+ ret = mark_fd_nonblocking(afs_socket);
if (ret < 0)
exit(EXIT_FAILURE);
add_close_on_fork_list(afs_socket);
}
-static unsigned do_inits(int argc, char **argv)
+static unsigned server_init(int argc, char **argv)
{
/* connector's address information */
int sockfd;
/* become daemon */
if (conf.daemon_given)
daemon_init();
- init_selector();
-// PARA_ERROR_LOG("num: %d\n", mmd->selector_num);
- PARA_NOTICE_LOG("%s", "initializing virtual streaming system\n");
+ PARA_NOTICE_LOG("initializing audio format handlers\n");
+ afh_init();
+ PARA_NOTICE_LOG("initializing virtual streaming system\n");
vss_init();
mmd->server_pid = getpid();
setup_signal_handling();
+ PARA_NOTICE_LOG("initializing the audio file selector\n");
init_afs();
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();
- PARA_NOTICE_LOG("%s", "init complete\n");
+ PARA_NOTICE_LOG("server init complete\n");
return sockfd;
}
-static void change_selector(void)
-{
- int ret, old = mmd->selector_num, new = mmd->selector_change;
-
- selectors[old].shutdown();
- ret = selectors[new].init(&selectors[new]);
- mmd->selector_change = -1; /* reset */
- if (ret >= 0) {
- mmd->selector_num = new;
- return;
- }
- /* init failed */
- PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
- selectors[0].init(&selectors[0]);
- mmd->selector_num = 0;
-}
-
/*
* called when server gets SIGHUP or when client invokes hup command.
*/
close_log(logfile); /* gets reopened if necessary by parse_config */
logfile = NULL;
parse_config(1); /* reopens log */
- mmd->selector_change = mmd->selector_num; /* do not change selector.. */
- change_selector(); /* .. just reload */
init_user_list(user_list_file); /* reload user list */
if (afs_pid)
kill(afs_pid, SIGHUP);
prev_events = mmd->events;
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);
}
}
{
/* listen on sock_fd, new connection on new_fd */
int sockfd, new_fd;
- struct sockaddr_in their_addr;
+ 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:
FD_ZERO(&rfds);
FD_ZERO(&wfds);
/* 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();
+ 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( &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);
+ senders[i].pre_select(&max_fileno, &rfds, &wfds);
}
mmd_unlock();
ret = para_select(max_fileno + 1, &rfds, &wfds, timeout);
mmd_lock();
- if (mmd->selector_change >= 0)
- change_selector();
- if (selectors[mmd->selector_num].post_select)
- selectors[mmd->selector_num].post_select(&rfds, &wfds);
+ vss_post_select(&rfds, &wfds);
if (ret < 0)
goto repeat;
for (i = 0; senders[i].name; i++) {
break;
case SIGCHLD:
for (;;) {
- pid = para_reap_child();
- if (pid <= 0)
+ ret = para_reap_child(&pid);
+ if (ret <= 0)
break;
if (pid != afs_pid)
continue;
PARA_EMERG_LOG("terminating on signal %d\n", sig);
genocide:
kill(0, SIGTERM);
- selectors[mmd->selector_num].shutdown();
mutex_destroy(mmd_mutex);
shm_detach(mmd);
shm_destroy(mmd_shm_id);
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();
}
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