X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=server.c;h=2b5971474c1b0f6ec7e55e775ed290680ce36f0d;hp=c2ede7aa92566337c8d5644d1913da5b247ff512;hb=f269333700038603703ec79c909d514bee731faf;hpb=1f556ae88bd8c85d4452f689f532f5a6abeabe92

diff --git a/server.c b/server.c
index c2ede7aa..2b597147 100644
--- a/server.c
+++ b/server.c
@@ -41,6 +41,8 @@
 #include "daemon.h"
 #include "string.h"
 #include "ipc.h"
+#include "fd.h"
+#include "crypt.h"
 
 /** define the array of error lists needed by para_server */
 INIT_SERVER_ERRLISTS;
@@ -55,15 +57,16 @@ struct misc_meta_data *mmd;
  * It also contains the options for all audio file selectors and all supported
  * senders.
 */
-struct gengetopt_args_info conf;
+struct server_args_info conf;
 char *user_list = NULL;
+struct list_head _user_list;
 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[];
 
+/* TODO: This is better handled by autoconf */
 /** the list of supported audio file selectors */
-struct audio_file_selector dblist[] = {
+struct audio_file_selector selectors[] = {
 	{
 		.name = "random",
 		.init = random_selector_init,
@@ -123,7 +126,7 @@ 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;
@@ -134,15 +137,7 @@ void para_log(int ll, char* fmt,...)
 
 	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);
@@ -241,7 +236,7 @@ static void parse_config(int override)
 	}
 	if (!ret) {
 		int tmp = conf.daemon_given;
-		cmdline_parser_configfile(cf, &conf, override, 0, 0);
+		server_cmdline_parser_configfile(cf, &conf, override, 0, 0);
 		conf.daemon_given = tmp;
 	}
 	/* logfile */
@@ -268,7 +263,6 @@ 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);
@@ -282,6 +276,102 @@ static void setup_signal_handling(void)
 	}
 }
 
+/*
+ * lookup user in user_list file. Fills in a user struct containing
+ * filename of the user's public key as well as the permissions of that user.
+ * Returns 1 on success, 0 if user does not exist and < 0 on errors.
+ */
+static void populate_user_list(void) {
+	FILE *file_ptr = NULL;
+	char *char_ptr;
+	char line[MAXLINE];
+	/* keyword, user, key, perms */
+	char w[MAXLINE], n[MAXLINE], k[MAXLINE], p[MAXLINE], tmp[4][MAXLINE];
+	int num, ret;
+
+	file_ptr = fopen(user_list, "r");
+	ret = -E_USERLIST;
+	if (!file_ptr)
+		goto out;
+	for (;;) {
+		struct _user *u;
+		ret = para_fgets(line, MAXLINE, file_ptr);
+		if (ret < 0)
+			PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+		if (ret <= 0)
+			break;
+		if (sscanf(line,"%200s %200s %200s %200s", w, n, k, p) < 3)
+			continue;
+		if (strcmp(w, "user"))
+			continue;
+		PARA_DEBUG_LOG("found entry for %s\n", n);
+		u = para_malloc(sizeof(struct _user));
+		u->name = para_strdup(n);
+		u->rsa = para_malloc(sizeof(RSA));
+		ret = get_rsa_key(k, &u->rsa, 0 /* public */);
+		if (ret < 0)
+			break;
+		u->perms = 0;
+		char_ptr = p;
+		num = sscanf(char_ptr, "%200[A-Z_],%200[A-Z_],%200[A-Z_],%200[A-Z_]",
+			tmp[0], tmp[1], tmp[2], tmp[3]);
+		PARA_DEBUG_LOG("found %i perm entries\n", num);
+		u->perms = 0;
+		while (num > 0) {
+			num--;
+			if (!strcmp(tmp[num], "AFS_READ"))
+				u->perms |= AFS_READ;
+			else if (!strcmp(tmp[num], "AFS_WRITE"))
+				u->perms |= AFS_WRITE;
+			else if (!strcmp(tmp[num], "DB_READ"))
+				u->perms |= DB_READ;
+			else if (!strcmp(tmp[num], "DB_WRITE"))
+				u->perms |= DB_WRITE;
+			else /* unknown permission */
+				PARA_WARNING_LOG("unknown permission: %s\n",
+					tmp[num]);
+		}
+		para_list_add(&u->node, &_user_list);
+	}
+out:
+	if (file_ptr)
+		fclose(file_ptr);
+	if (ret >= 0)
+		return;
+	PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+	exit(EXIT_FAILURE);
+}
+
+static void init_user_list(void)
+{
+	struct _user *u, *tmp;
+	static int initialized;
+
+	if (initialized) {
+		list_for_each_entry_safe(u, tmp, &_user_list, node) {
+			list_del(&u->node);
+			free(u->name);
+			free(u->rsa);
+			free(u);
+		}
+	} else
+		INIT_LIST_HEAD(&_user_list);
+	initialized = 1;
+	populate_user_list();
+}
+
+int _get_user(struct _user *user)
+{
+	struct _user *u;
+	list_for_each_entry(u, &_user_list, node) {
+		if (strcmp(u->name, user->name))
+			continue;
+		*user = *u;
+		return 1;
+	}
+	return 0;
+}
+
 static void init_selector(void)
 {
 	int i, ret;
@@ -289,12 +379,12 @@ static void init_selector(void)
 	mmd->selector_change = -1; /* no change nec., set to new num by com_chs */
 	if (!conf.selector_given)
 		goto random;
-	for (i = 0; dblist[i].name; i++) {
-		if (strcmp(dblist[i].name, conf.selector_arg))
+	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",
-			dblist[i].name);
-		ret = dblist[i].init(&dblist[i]);
+			selectors[i].name);
+		ret = selectors[i].init(&selectors[i]);
 		if (ret < 0) {
 			PARA_WARNING_LOG("%s", PARA_STRERROR(-ret));
 			break;
@@ -305,16 +395,23 @@ static void init_selector(void)
 	PARA_WARNING_LOG("%s", "falling back to the random selector\n");
 random:
 	mmd->selector_num = 0;
-	dblist[0].init(&dblist[0]); /* always successful */
+	selectors[0].init(&selectors[0]); /* always successful */
 }
 
 static unsigned init_network(void)
 {
-	int sockfd = init_tcp_socket(conf.port_arg);
+	int fd, ret = init_tcp_socket(conf.port_arg);
 
-	if (sockfd < 0)
-		exit(EXIT_FAILURE);
-	return sockfd;
+	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)
@@ -347,13 +444,14 @@ static unsigned do_inits(int argc, char **argv)
 
 	init_random_seed();
 	/* parse command line options */
-	cmdline_parser(argc, argv, &conf);
-	para_drop_privileges(conf.user_arg);
+	server_cmdline_parser(argc, argv, &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();
 	/* become daemon */
 	if (conf.daemon_given)
 		daemon_init();
@@ -367,10 +465,6 @@ static unsigned do_inits(int argc, char **argv)
 	/* 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;
 }
@@ -379,8 +473,8 @@ static void change_selector(void)
 {
 	int ret, old = mmd->selector_num, new = mmd->selector_change;
 
-	dblist[old].shutdown();
-	ret = dblist[new].init(&dblist[new]);
+	selectors[old].shutdown();
+	ret = selectors[new].init(&selectors[new]);
 	mmd->selector_change = -1; /* reset */
 	if (ret >= 0) {
 		mmd->selector_num = new;
@@ -388,7 +482,7 @@ static void change_selector(void)
 	}
 	/* init failed */
 	PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
-	dblist[0].init(&dblist[0]);
+	selectors[0].init(&selectors[0]);
 	mmd->selector_num = 0;
 }
 
@@ -436,7 +530,7 @@ 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;
@@ -444,14 +538,12 @@ int main(int argc, char *argv[])
 	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);
-
+	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 = afs_preselect();
 	status_refresh();
 	for (i = 0; senders[i].name; i++) {
@@ -459,44 +551,30 @@ repeat:
 			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 (dblist[mmd->selector_num].pre_select) {
-		ret = dblist[mmd->selector_num].pre_select(&rfds, &wfds);
-		max_fileno = MAX(max_fileno, ret);
+	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->selector_change >= 0)
 		change_selector();
-	if (dblist[mmd->selector_num].post_select)
-		dblist[mmd->selector_num].post_select(&rfds, &wfds);
-	if (ret < 0 && err == EINTR)
-		goto repeat;
-	if (ret < 0) {
-		PARA_CRIT_LOG("select error (%s)\n", strerror(err));
+	if (selectors[mmd->selector_num].post_select)
+		selectors[mmd->selector_num].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);
 	}
+	afs_send_chunk();
+	status_refresh();
 	if (FD_ISSET(signal_pipe, &rfds)) {
 		int sig;
 		sig = para_next_signal();
@@ -512,7 +590,7 @@ repeat:
 		case SIGTERM:
 			PARA_EMERG_LOG("terminating on signal %d\n", sig);
 			kill(0, SIGTERM);
-			dblist[mmd->selector_num].shutdown();
+			selectors[mmd->selector_num].shutdown();
 			mutex_destroy(mmd_mutex);
 			shm_detach(mmd);
 			shm_destroy(mmd_shm_id);