Import generic network IO code. The plan is to hide the boring

details of IO operations such as buffering or SSL, and provide a
slightly nicer interface to the protocol writer.

Not plugged to the rest of the code yet.

ok gilles@

1 files changed, 67 insertions, 0 deletions

diff --git a/usr.sbin/smtpd/ioev.h b/usr.sbin/smtpd/ioev.h
new file mode 100644
index 00000000000..721a1aa925e
--- /dev/null
+++ b/usr.sbin/smtpd/ioev.h
@@ -0,0 +1,67 @@
+/*	$OpenBSD: ioev.h,v 1.1 2012/01/29 00:32:51 eric Exp $	*/
+/*
+ * Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <event.h>
+
+enum {
+	IO_CONNECTED = 0, 	/* connection successful	*/
+	IO_TLSREADY,		/* TLS started succesfully	*/
+	IO_DATAIN,		/* new data in input buffer	*/
+	IO_LOWAT,		/* output queue running low	*/
+	IO_DISCONNECTED,	/* error?			*/
+	IO_TIMEOUT,		/* error?			*/
+	IO_ERROR,		/* details?			*/
+};
+
+#define IO_READ			0x01
+#define IO_WRITE		0x02
+#define IO_RW			(IO_READ | IO_WRITE)
+#define IO_PAUSE_IN		0x04
+#define IO_PAUSE_OUT		0x08
+#define IO_RESET		0x10  /* internal */
+#define IO_HELD			0x20  /* internal */
+
+struct iobuf;
+struct io {
+	int		 sock;
+	void		*arg;
+	void		(*cb)(struct io*, int);
+	struct iobuf	*iobuf;
+	size_t		 lowat;
+	int		 timeout;
+	int		 flags;
+	int		 state;
+	struct event	 ev;
+	void		*ssl;
+};
+
+void io_set_blocking(int, int);
+void io_set_linger(int, int);
+
+void io_init(struct io*, int, void*, void(*)(struct io*, int), struct iobuf*);
+void io_clear(struct io*);
+void io_set_read(struct io *);
+void io_set_write(struct io *);
+void io_set_timeout(struct io *, int);
+void io_set_lowat(struct io *, size_t);
+void io_pause(struct io *, int);
+void io_resume(struct io *, int);
+void io_reload(struct io *);
+int io_connect(struct io *, const struct sockaddr *);
+int io_start_tls(struct io *, void *);
+const char* io_strio(struct io *);
+const char* io_strevent(int);