/*
- * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2008 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file server.c Paraslash's main server. */
-/** \mainpage Paraslash API Reference
+/**
+ * \mainpage Paraslash API Reference
*
* Starting points for getting an overview are
*
*
* 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 \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
+ * - 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 audio_format_info,
+ * \ref afs_info \ref afh_info,
* - Afs tables: \ref aft.c, \ref mood.c, \ref playlist.c,
- * \ref attribute.c, \ref score.c.
+ * \ref attribute.c, \ref score.c,
+ * - The virtual streaming system: \ref vss.c, \ref chunk_queue.c.
*
* Lower levels:
*
* - Daemons: \ref daemon.c,
* - Strings: \ref string.c, \ref string.h,
* - Time: \ref time.c,
- * - Spawning processes: \ref exec.c
+ * - Spawning processes: \ref exec.c,
* - Inter process communication: \ref ipc.c,
* - The object storage layer: \ref osl.c,
* - Blob tables: \ref blob.c,
- * - Queueing chunks of audio data: \ref chunk_queue.c,
* - The error subssystem: \ref error.h.
+ * - Access control for paraslash senders: \ref acl.c, \ref acl.h.
*
- * Lov-level data structures:
+ * Low-level data structures:
*
* - Doubly linked lists: \ref list.h,
* - Red-black trees: \ref rbtree.h, \ref rbtree.c,
#include "vss.h"
#include "config.h"
#include "close_on_fork.h"
+#include "list.h"
#include "send.h"
#include "net.h"
#include "daemon.h"
#include "ipc.h"
#include "fd.h"
-#include "list.h"
#include "sched.h"
#include "signal.h"
#include "user_list.h"
/** 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 *);
-
-/** 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",
- .init = ortp_send_init,
- },
-#endif
- {
- .name = NULL,
- }
-};
-
-
/* global variables for server-internal use */
static FILE *logfile;
static int mmd_mutex, mmd_shm_id;
static int signal_pipe;
+struct server_command_task {
+ /** TCP port on which para_server listens for connections. */
+ int listen_fd;
+ /** Copied from para_server's main function. */
+ int argc;
+ /** Argument vector passed to para_server's main function. */
+ char **argv;
+ /** The command task structure for scheduling. */
+ //struct task task;
+ char dummy;
+};
+
/**
* para_server's log function
*
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);
mmd->events = 0;
mmd->num_connects = 0;
mmd->active_connections = 0;
- strcpy(mmd->afd.path, "(none)");
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);
}
struct server_cmdline_parser_params params = {
.override = override,
.initialize = 0,
- .check_required = 0,
- .check_ambiguity = 0
+ .check_required = 1,
+ .check_ambiguity = 0,
+ .print_errors = 1
};
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;
static void setup_signal_handling(void)
{
- int ret = 0;
-
- signal_pipe = para_signal_init();
- 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);
- }
+ 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)
+static void init_command_task(struct server_command_task *sct)
{
- int fd, ret = init_tcp_socket(conf.port_arg);
+ int ret;
+ PARA_NOTICE_LOG("initializing tcp command socket\n");
+ ret = para_listen(AF_UNSPEC, IPPROTO_TCP, conf.port_arg);
if (ret < 0)
goto err;
- fd = ret;
- ret = mark_fd_nonblock(fd);
+ sct->listen_fd = ret;
+ ret = mark_fd_nonblocking(sct->listen_fd);
if (ret < 0)
goto err;
- return fd;
+ add_close_on_fork_list(sct->listen_fd); /* child doesn't need the listener */
+ return;
err:
- PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
static void init_random_seed(void)
{
- int fd, ret = -1;
unsigned int seed;
- size_t len = sizeof(unsigned int);
+ int fd, ret = para_open("/dev/urandom", O_RDONLY, 0);
- fd = open("/dev/urandom", 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);
}
}
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);
(unsigned) afs_socket_cookie);
}
-
-static unsigned do_inits(int argc, char **argv)
+static void server_init(int argc, char **argv)
{
/* connector's address information */
- int sockfd;
-
+ struct server_cmdline_parser_params params = {
+ .override = 0,
+ .initialize = 1,
+ .check_required = 0,
+ .check_ambiguity = 0,
+ .print_errors = 1
+ };
init_random_seed();
/* parse command line options */
- server_cmdline_parser(argc, argv, &conf);
+ server_cmdline_parser_ext(argc, argv, &conf, ¶ms);
HANDLE_VERSION_FLAG("server", conf);
para_drop_privileges(conf.user_arg, conf.group_arg);
/* parse config file, open log and set defaults */
/* become daemon */
if (conf.daemon_given)
daemon_init();
- PARA_NOTICE_LOG("%s", "initializing virtual streaming system\n");
+ PARA_NOTICE_LOG("initializing audio format handlers\n");
afh_init();
- vss_init();
mmd->server_pid = getpid();
setup_signal_handling();
+ PARA_NOTICE_LOG("initializing the audio file selector\n");
init_afs();
+ PARA_NOTICE_LOG("initializing virtual streaming system\n");
+ vss_init();
mmd_lock();
- /* init network socket */
- PARA_NOTICE_LOG("%s", "initializing tcp command socket\n");
- sockfd = init_network();
- PARA_NOTICE_LOG("%s", "init complete\n");
- return sockfd;
+ PARA_NOTICE_LOG("server init complete\n");
}
/*
*/
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 */
}
}
+static int server_select(int max_fileno, fd_set *readfds, fd_set *writefds,
+ struct timeval *timeout_tv)
+{
+ int ret;
+
+ status_refresh();
+ mmd_unlock();
+ ret = para_select(max_fileno + 1, readfds, writefds, timeout_tv);
+ mmd_lock();
+ return ret;
+}
+
+static void command_pre_select(int *max_fileno, fd_set *rfds, char *dummy_ptr)
+{
+ struct server_command_task *sct = container_of(dummy_ptr, struct server_command_task, dummy);
+ para_fd_set(sct->listen_fd, rfds, max_fileno);
+}
+
+static void command_post_select(fd_set *rfds, char *dummy_ptr)
+{
+ struct server_command_task *sct = container_of(dummy_ptr, struct server_command_task, dummy);
+
+ int new_fd, ret;
+ char *peer_name;
+ pid_t child_pid;
+
+ if (!FD_ISSET(sct->listen_fd, rfds))
+ return;
+ ret = para_accept(sct->listen_fd, NULL, 0);
+ if (ret < 0)
+ goto out;
+ new_fd = ret;
+ peer_name = remote_name(new_fd);
+ PARA_INFO_LOG("got connection from %s, forking\n", peer_name);
+ mmd->num_connects++;
+ mmd->active_connections++;
+ random();
+ child_pid = fork();
+ if (child_pid < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto out;
+ }
+ if (child_pid) {
+ close(new_fd);
+ /* parent keeps accepting connections */
+ return;
+ }
+ alarm(ALARM_TIMEOUT);
+ close_listed_fds();
+ 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)", peer_name);
+ return handle_connect(new_fd, peer_name);
+out:
+ if (ret < 0)
+ PARA_CRIT_LOG("%s\n", para_strerror(-ret));
+}
+
/**
* the main function of para_server
*
*/
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 i, max_fileno, ret;
- pid_t chld_pid;
+ int max_fileno, ret;
fd_set rfds, wfds;
struct timeval *timeout;
+ struct server_command_task server_command_task_struct;
+
valid_fd_012();
- sockfd = do_inits(argc, argv);
+ server_init(argc, argv);
+ init_command_task(&server_command_task_struct);
repeat:
FD_ZERO(&rfds);
FD_ZERO(&wfds);
max_fileno = -1;
- /* check socket and signal pipe in any case */
- para_fd_set(sockfd, &rfds, &max_fileno);
+ command_pre_select(&max_fileno, &rfds, &server_command_task_struct.dummy);
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(&max_fileno, &rfds, &wfds);
- }
- mmd_unlock();
- ret = para_select(max_fileno + 1, &rfds, &wfds, timeout);
- mmd_lock();
+ server_select(max_fileno + 1, &rfds, &wfds, timeout);
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(&rfds, &wfds);
- }
- vss_send_chunk();
- status_refresh();
if (FD_ISSET(signal_pipe, &rfds)) {
int sig;
pid_t pid;
exit(EXIT_FAILURE);
}
}
- if (mmd->sender_cmd_data.cmd_num >= 0) {
- int num = mmd->sender_cmd_data.cmd_num,
- s = mmd->sender_cmd_data.sender_num;
-
- if (senders[s].client_cmds[num])
- senders[s].client_cmds[num](&mmd->sender_cmd_data);
- mmd->sender_cmd_data.cmd_num = -1;
- }
- if (!FD_ISSET(sockfd, &rfds))
- goto repeat;
-
- new_fd = para_accept(sockfd, &their_addr, sizeof(struct sockaddr_in));
- if (new_fd < 0)
- goto repeat;
- PARA_INFO_LOG("got connection from %s, forking\n",
- inet_ntoa(their_addr.sin_addr));
- mmd->num_connects++;
- mmd->active_connections++;
- random();
- chld_pid = fork();
- if (chld_pid < 0) {
- PARA_CRIT_LOG("%s", "fork failed\n");
- goto repeat;
- }
- if (chld_pid) {
- close(new_fd);
- /* parent keeps accepting connections */
- goto repeat;
- }
- alarm(ALARM_TIMEOUT);
- close_listed_fds();
- close(sockfd); /* child doesn't need the listener */
- /*
- * 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);
+ command_post_select(&rfds, &server_command_task_struct.dummy);
+ goto repeat;
}
projects / paraslash.git / blobdiff