tcp_connect: generic library for establishing TCP connections

1 files changed, 96 insertions, 0 deletions

diff --git a/src/tcp_connect.h b/src/tcp_connect.h
new file mode 100644
index 000000000..bdbe85c14
--- /dev/null
+++ b/src/tcp_connect.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TCP_CONNECT_H
+#define MPD_TCP_CONNECT_H
+
+#include <glib.h>
+
+struct sockaddr;
+
+struct tcp_connect_handler {
+	/**
+	 * The connection was established successfully.
+	 *
+	 * @param fd a file descriptor that must be closed with
+	 * close_socket() when finished
+	 */
+	void (*success)(int fd, void *ctx);
+
+	/**
+	 * An error has occurred.  The method is responsible for
+	 * freeing the GError.
+	 */
+	void (*error)(GError *error, void *ctx);
+
+	/**
+	 * The connection could not be established in the specified
+	 * time span.
+	 */
+	void (*timeout)(void *ctx);
+
+	/**
+	 * The operation was canceled before a result was available.
+	 */
+	void (*canceled)(void *ctx);
+};
+
+struct tcp_connect;
+
+/**
+ * Establish a TCP connection to the specified address.
+ *
+ * Note that the result may be available before this function returns.
+ *
+ * The caller must free this object with tcp_connect_free().
+ *
+ * @param timeout_ms time out after this number of milliseconds; 0
+ * means no timeout
+ * @param handle_r a handle that can be used to cancel the operation;
+ * the caller must initialize it to NULL
+ */
+void
+tcp_connect_address(const struct sockaddr *address, size_t address_length,
+		    unsigned timeout_ms,
+		    const struct tcp_connect_handler *handler, void *ctx,
+		    struct tcp_connect **handle_r);
+
+/**
+ * Cancel the operation.  It is possible that the result is delivered
+ * before the operation has been canceled; in that case, the
+ * canceled() handler method will not be invoked.
+ *
+ * Even after calling this function, tcp_connect_free() must still be
+ * called to free memory.
+ */
+void
+tcp_connect_cancel(struct tcp_connect *handle);
+
+/**
+ * Free memory used by this object.
+ *
+ * This function is not thread safe.  It must not be called while
+ * other threads are still working with it.  If no callback has been
+ * invoked so far, then you must call tcp_connect_cancel() to release
+ * I/O thread resources, before calling this function.
+ */
+void
+tcp_connect_free(struct tcp_connect *handle);
+
+#endif