X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afs.c;h=f6d6b8d78145829993fd6e817555b56b669fc460;hp=0efb6991fe20b4d7e5aadd5585841cc39f739a5f;hb=769888ee3175ed60df3c23caf51cdad5db33d141;hpb=74d8b443aba528dc65af874a81c53be26aaace9e

diff --git a/afs.c b/afs.c
index 0efb6991..f6d6b8d7 100644
--- a/afs.c
+++ b/afs.c
@@ -6,6 +6,8 @@
 
 /** \file afs.c Paraslash's audio file selector. */
 
+#include <signal.h>
+#include <fnmatch.h>
 #include "server.cmdline.h"
 #include "para.h"
 #include "afh.h"
@@ -144,11 +146,12 @@ int send_callback_request(callback_function *f, struct osl_object *query,
 	int ret, fd = -1, query_shmid, result_shmid;
 	void *query_shm, *result_shm;
 	char buf[sizeof(afs_socket_cookie) + sizeof(int)];
-//	char *tmpsocket_name;
 	struct sockaddr_un unix_addr;
+	size_t query_shm_size = sizeof(*cq);
 
-	assert(query->data && query->size);
-	ret = shm_new(query->size + sizeof(*cq));
+	if (query)
+		query_shm_size += query->size;
+	ret = shm_new(query_shm_size);
 	if (ret < 0)
 		return ret;
 	query_shmid = ret;
@@ -157,9 +160,10 @@ int send_callback_request(callback_function *f, struct osl_object *query,
 		goto out;
 	cq = query_shm;
 	cq->handler = f;
-	cq->query_size = query->size;
+	cq->query_size = query_shm_size - sizeof(*cq);
 
-	memcpy(query_shm + sizeof(*cq), query->data, query->size);
+	if (query)
+		memcpy(query_shm + sizeof(*cq), query->data, query->size);
 	ret = shm_detach(query_shm);
 	if (ret < 0)
 		goto out;
@@ -276,6 +280,42 @@ int send_standard_callback_request(int argc,  char * const * const argv,
 	return send_option_arg_callback_request(NULL, argc, argv, f, result);
 }
 
+static int action_if_pattern_matches(struct osl_row *row, void *data)
+{
+	struct pattern_match_data *pmd = data;
+	struct osl_object name_obj;
+	const char *p, *name;
+	int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj);
+	const char *pattern_txt = (const char *)pmd->patterns.data;
+
+	if (ret < 0)
+		return ret;
+	name = (char *)name_obj.data;
+	if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
+		return 1;
+	if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING))
+		return pmd->action(pmd->table, row, name, pmd->data);
+	for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
+			p += strlen(p) + 1) {
+		ret = fnmatch(p, name, pmd->fnmatch_flags);
+		if (ret == FNM_NOMATCH)
+			continue;
+		if (ret)
+			return -E_FNMATCH;
+		return pmd->action(pmd->table, row, name, pmd->data);
+	}
+	return 1;
+}
+
+int for_each_matching_row(struct pattern_match_data *pmd)
+{
+	if (pmd->pm_flags & PM_REVERSE_LOOP)
+		return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
+			action_if_pattern_matches);
+	return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
+			action_if_pattern_matches);
+}
+
 /**
  * Compare two osl objects of string type.
  *
@@ -298,82 +338,41 @@ int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
 	return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
 }
 
-/**
- * A wrapper for strtol(3).
- *
- * \param str The string to be converted to a long integer.
- * \param result The converted value is stored here.
- *
- * \return Positive on success, -E_ATOL on errors.
- *
- * \sa strtol(3), atoi(3).
- */
-int para_atol(const char *str, long *result)
-{
-	char *endptr;
-	long val;
-	int ret, base = 10;
-
-	errno = 0; /* To distinguish success/failure after call */
-	val = strtol(str, &endptr, base);
-	ret = -E_ATOL;
-	if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
-		goto out; /* overflow */
-	if (errno != 0 && val == 0)
-		goto out; /* other error */
-	if (endptr == str)
-		goto out; /* No digits were found */
-	if (*endptr != '\0')
-		goto out; /* Further characters after number */
-	*result = val;
-	ret = 1;
-out:
-	return ret;
-}
-
-
 /*
- * write input from fd to dynamically allocated char array,
- * but maximal max_size byte. Return size.
+ * write input from fd to dynamically allocated buffer,
+ * but maximal max_size byte.
  */
-static int fd2buf(int fd, char **buf, int max_size)
+static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
 {
 	const size_t chunk_size = 1024;
-	size_t size = 2048;
-	char *p;
+	size_t size = 2048, received = 0;
 	int ret;
+	char *buf = para_malloc(size);
 
-	*buf = para_malloc(size * sizeof(char));
-	p = *buf;
-	while ((ret = read(fd, p, chunk_size)) > 0) {
-		p += ret;
-		if ((p - *buf) + chunk_size >= size) {
-			char *tmp;
-
+	for (;;) {
+		ret = recv_bin_buffer(fd, buf + received, chunk_size);
+		if (ret <= 0)
+			break;
+		received += ret;
+		if (received + chunk_size >= size) {
 			size *= 2;
-			if (size > max_size) {
-				ret = -E_INPUT_TOO_LARGE;
-				goto out;
-			}
-			tmp = para_realloc(*buf, size);
-			p = (p - *buf) + tmp;
-			*buf = tmp;
+			ret = -E_INPUT_TOO_LARGE;
+			if (size > max_size)
+				break;
+			buf = para_realloc(buf, size);
 		}
 	}
-	if (ret < 0) {
-		ret = -E_READ;
-		goto out;
-	}
-	ret = p - *buf;
-out:
-	if (ret < 0 && *buf)
-		free(*buf);
+	obj->data = buf;
+	obj->size = received;
+	if (ret < 0)
+		free(buf);
 	return ret;
 }
 
 /**
- * Read from stdin, and send the result to the parent process.
+ * Read data from a file descriptor, and send it to the afs process.
  *
+ * \param fd File descriptor to read data from.
  * \param arg_obj Pointer to the arguments to \a f.
  * \param f The callback function.
  * \param max_len Don't read more than that many bytes from stdin.
@@ -381,29 +380,30 @@ out:
  *
  * This function is used by commands that wish to let para_server store
  * arbitrary data specified by the user (for instance the add_blob family of
- * commands). First, at most \a max_len bytes are read from stdin, the result
+ * commands). First, at most \a max_len bytes are read from \a fd, the result
  * is concatenated with the buffer given by \a arg_obj, and the combined buffer
  * is made available to the parent process via shared memory.
  *
  * \return Negative on errors, the return value of the underlying call to
  * send_callback_request() otherwise.
  */
-int stdin_command(struct osl_object *arg_obj, callback_function *f,
+int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
 		unsigned max_len, struct osl_object *result)
 {
-	char *stdin_buf;
-	size_t stdin_len;
-	struct osl_object query;
-	int ret = fd2buf(STDIN_FILENO, &stdin_buf, max_len);
+	struct osl_object query, stdin_obj;
+	int ret;
 
+	ret = send_buffer(fd, AWAITING_DATA_MSG);
+	if (ret < 0)
+		return ret;
+	ret = fd2buf(fd, max_len, &stdin_obj);
 	if (ret < 0)
 		return ret;
-	stdin_len = ret;
-	query.size = arg_obj->size + stdin_len;
+	query.size = arg_obj->size + stdin_obj.size;
 	query.data = para_malloc(query.size);
 	memcpy(query.data, arg_obj->data, arg_obj->size);
-	memcpy((char *)query.data + arg_obj->size, stdin_buf, stdin_len);
-	free(stdin_buf);
+	memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
+	free(stdin_obj.data);
 	ret = send_callback_request(f, &query, result);
 	free(query.data);
 	return ret;
@@ -480,7 +480,7 @@ static enum play_mode init_admissible_files(void)
 	given_playlist = "given_playlist";
 
 	if (given_mood) {
-		ret = mood_open(given_mood);
+		ret = change_current_mood(given_mood);
 		if (ret >= 0) {
 			if (given_playlist)
 				PARA_WARNING_LOG("ignoring playlist %s\n",
@@ -493,10 +493,10 @@ static enum play_mode init_admissible_files(void)
 		if (ret >= 0)
 			return PLAY_MODE_PLAYLIST;
 	}
-	ret = mood_open(NULL); /* open first available mood */
+	ret = change_current_mood(NULL); /* open first available mood */
 	if (ret >= 0)
 		return PLAY_MODE_MOOD;
-	mood_open(""); /* open dummy mood, always successful */
+	change_current_mood(""); /* open dummy mood, always successful */
 	return PLAY_MODE_MOOD;
 }
 
@@ -537,7 +537,7 @@ static void close_afs_tables(enum osl_close_flags flags)
 	PARA_NOTICE_LOG("closing afs_tables\n");
 	score_shutdown(flags);
 	attribute_shutdown(flags);
-	mood_close();
+	close_current_mood();
 	playlist_close();
 	moods_shutdown(flags);
 	playlists_shutdown(flags);
@@ -560,10 +560,10 @@ static void signal_post_select(struct sched *s, struct task *t)
 	if (!FD_ISSET(st->fd, &s->rfds))
 		return;
 	st->signum = para_next_signal();
-	PARA_NOTICE_LOG("caught signal %d\n", st->signum);
 	t->ret = 1;
 	if (st->signum == SIGUSR1)
 		return; /* ignore SIGUSR1 */
+	PARA_NOTICE_LOG("caught signal %d\n", st->signum);
 	t->ret = -E_SIGNAL_CAUGHT;
 	unregister_tasks();
 }
@@ -584,11 +584,23 @@ static void register_signal_task(void)
 	register_task(&st->task);
 }
 
+static struct list_head afs_client_list;
+
+struct afs_client {
+	struct list_head node;
+	int fd;
+	struct timeval connect_time;
+};
+
 static void command_pre_select(struct sched *s, struct task *t)
 {
 	struct command_task *ct = t->private_data;
-	t->ret = 1;
+	struct afs_client *client;
+
 	para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
+	list_for_each_entry(client, &afs_client_list, node)
+		para_fd_set(client->fd, &s->rfds, &s->max_fileno);
+	t->ret = 1;
 }
 
 /*
@@ -646,54 +658,75 @@ out:
 	return ret;
 }
 
-static void command_post_select(struct sched *s, struct task *t)
+static void execute_afs_command(int fd, uint32_t expected_cookie)
 {
-	struct command_task *ct = t->private_data;
-	struct sockaddr_un unix_addr;
-	char buf[sizeof(uint32_t) + sizeof(int)];
 	uint32_t cookie;
-	int query_shmid, fd;
+	int query_shmid;
+	char buf[sizeof(cookie) + sizeof(query_shmid)];
+	int ret = recv_bin_buffer(fd, buf, sizeof(buf));
 
-	t->ret = 1;
-	if (!FD_ISSET(ct->fd, &s->rfds))
-		return;
-	t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
-	if (t->ret < 0)
+	if (ret < 0) {
+		PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret));
 		return;
-	/*
-	 * The following errors may be caused by a malicious local user. So do
-	 * not return an error in this case as this would terminate  para_afs
-	 * and para_server.
-	 */
-	fd = t->ret;
-	/* FIXME: This is easily dosable (peer doesn't send data) */
-	t->ret = recv_bin_buffer(fd, buf, sizeof(buf));
-	if (t->ret < 0) {
-		PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret);
-		goto out;
 	}
-	if (t->ret != sizeof(buf)) {
+	if (ret != sizeof(buf)) {
 		PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
-			t->ret, (long unsigned) sizeof(buf));
-		goto out;
+			ret, (long unsigned) sizeof(buf));
+		return;
 	}
 	cookie = *(uint32_t *)buf;
-	if (cookie != ct->cookie) {
+	if (cookie != expected_cookie) {
 		PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
-			(unsigned)cookie, (unsigned)ct->cookie);
-		goto out;
+			(unsigned)cookie, (unsigned)expected_cookie);
+		return;
 	}
 	query_shmid = *(int *)(buf + sizeof(cookie));
 	if (query_shmid < 0) {
 		PARA_WARNING_LOG("received invalid query shmid %d)\n",
 			query_shmid);
-		goto out;
+		return;
 	}
 	/* Ignore return value: Errors might be ok here. */
 	call_callback(fd, query_shmid);
+}
+
+#define AFS_CLIENT_TIMEOUT 3
+
+static void command_post_select(struct sched *s, struct task *t)
+{
+	struct command_task *ct = t->private_data;
+	struct sockaddr_un unix_addr;
+	struct afs_client *client, *tmp;
+
+	/* First, check the list of connected clients. */
+	list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
+		if (FD_ISSET(client->fd, &s->rfds))
+			execute_afs_command(client->fd, ct->cookie);
+		else { /* prevent bogus connection flodding */
+			struct timeval diff;
+			tv_diff(now, &client->connect_time, &diff);
+			if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
+				continue;
+			PARA_WARNING_LOG("connection timeout\n");
+		}
+		close(client->fd);
+		list_del(&client->node);
+		free(client);
+	}
+	/* Next, accept connections on the local socket. */
+	if (!FD_ISSET(ct->fd, &s->rfds))
+		goto out;
+	t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
+	if (t->ret < 0) {
+		PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+		goto out;
+	}
+	client = para_malloc(sizeof(*client));
+	client->fd = t->ret;
+	client->connect_time = *now;
+	para_list_add(&client->node, &afs_client_list);
 out:
 	t->ret = 1;
-	close(fd);
 }
 
 static void register_command_task(uint32_t cookie)
@@ -788,13 +821,19 @@ __noreturn int afs_init(uint32_t cookie, int socket_fd)
 {
 	enum play_mode current_play_mode;
 	struct sched s;
-	int ret = open_afs_tables();
+	int ret;
+
+	INIT_LIST_HEAD(&afs_client_list);
+	ret = open_afs_tables();
 
 	if (ret < 0) {
 		PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
 		exit(EXIT_FAILURE);
 	}
 	server_socket = socket_fd;
+	ret = mark_fd_nonblock(server_socket);
+	if (ret < 0)
+		exit(EXIT_FAILURE);
 	PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
 		server_socket, (unsigned) cookie);
 	current_play_mode = init_admissible_files();
@@ -859,3 +898,77 @@ int com_init(int fd, int argc, char * const * const argv)
 		return ret;
 	return send_va_buffer(fd, "successfully created afs table(s)\n");
 }
+
+enum com_check_flags {
+	CHECK_AFT = 1,
+	CHECK_MOODS = 2,
+	CHECK_PLAYLISTS = 4
+};
+
+int com_check(int fd, int argc, char * const * const argv)
+{
+	unsigned flags = 0;
+	int i, ret;
+	struct osl_object result;
+
+	for (i = 1; i < argc; i++) {
+		const char *arg = argv[i];
+		if (arg[0] != '-')
+			break;
+		if (!strcmp(arg, "--")) {
+			i++;
+			break;
+		}
+		if (!strcmp(arg, "-a")) {
+			flags |= CHECK_AFT;
+			continue;
+		}
+		if (!strcmp(arg, "-p")) {
+			flags |= CHECK_PLAYLISTS;
+			continue;
+		}
+		if (!strcmp(arg, "-m")) {
+			flags |= CHECK_MOODS;
+			continue;
+		}
+		return -E_AFS_SYNTAX;
+	}
+	if (i < argc)
+		return -E_AFS_SYNTAX;
+	if (!flags)
+		flags = ~0U;
+	if (flags & CHECK_AFT) {
+		ret = send_callback_request(aft_check_callback, NULL, &result);
+		if (ret < 0)
+			return ret;
+		if (ret > 0) {
+			ret = send_buffer(fd, (char *) result.data);
+			free(result.data);
+			if (ret < 0)
+				return ret;
+		}
+	}
+	if (flags & CHECK_PLAYLISTS) {
+		ret = send_callback_request(playlist_check_callback, NULL, &result);
+		if (ret < 0)
+			return ret;
+		if (ret > 0) {
+			ret = send_buffer(fd, (char *) result.data);
+			free(result.data);
+			if (ret < 0)
+				return ret;
+		}
+	}
+	if (flags & CHECK_MOODS) {
+		ret = send_callback_request(mood_check_callback, NULL, &result);
+		if (ret < 0)
+			return ret;
+		if (ret > 0) {
+			ret = send_buffer(fd, (char *) result.data);
+			free(result.data);
+			if (ret < 0)
+				return ret;
+		}
+	}
+	return 1;
+}