Imported from /home/lorry/working-area/delta_isc-dhcp-tarball/dhcp-4.2.8.tar.gz.HEADdhcp-4.2.8master

1 files changed, 77 insertions, 0 deletions

diff --git a/includes/omapip/buffer.h b/includes/omapip/buffer.h
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+/* buffer.h
+
+   Definitions for the object management API protocol buffering... */
+
+/*
+ * Copyright (c) 2004,2009,2014 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 1996-2003 by Internet Software Consortium
+ *
+ * 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 ISC DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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.
+ *
+ *   Internet Systems Consortium, Inc.
+ *   950 Charter Street
+ *   Redwood City, CA 94063
+ *   <info@isc.org>
+ *   https://www.isc.org/
+ *
+ */
+
+/* OMAPI buffers are ring buffers, which means that the beginning of the
+   buffer and the end of the buffer chase each other around.   As long as
+   the tail never catches up to the head, there's room in the buffer for
+   data.
+
+	- If the tail and the head are equal, the buffer is empty.
+
+	- If the tail is less than the head, the contents of the buffer
+	  are the bytes from the head to the end of buffer, and in addition,
+	  the bytes between the beginning of the buffer and the tail, not
+	  including the byte addressed by the tail.
+
+	- If the tail is greater than the head, then the buffer contains
+	  valid bytes starting with the byte addressed by the head, and
+	  ending with the byte before the byte addressed by the tail.
+
+   There will always be at least one byte of waste, because the tail can't
+   increase so that it's equal to the head (that would represent an empty
+   buffer. */
+#define OMAPI_BUF_SIZE 4048
+typedef struct _omapi_buffer {
+	struct _omapi_buffer *next;	/* Buffers can be chained. */
+	u_int32_t refcnt;		/* Buffers are reference counted. */
+	u_int16_t head, tail;		/* Buffers are organized in a ring. */
+	char buf [OMAPI_BUF_SIZE];	/* The actual buffer is included in
+					   the buffer data structure. */
+} omapi_buffer_t;	
+
+#define BUFFER_BYTES_FREE(x)	\
+	((x) -> tail > (x) -> head \
+	  ? sizeof ((x) -> buf) - ((x) -> tail - (x) -> head) \
+	  : (x) -> head - (x) -> tail)
+
+#define BYTES_IN_BUFFER(x)	\
+	((x) -> tail > (x) -> head \
+	 ? (x) -> tail - (x) -> head - 1 \
+	 : sizeof ((x) -> buf) - ((x) -> head - (x) -> tail) - 1)
+
+isc_result_t omapi_connection_require (omapi_object_t *, unsigned);
+isc_result_t omapi_connection_copyout (unsigned char *,
+				       omapi_object_t *, unsigned);
+isc_result_t omapi_connection_copyin (omapi_object_t *,
+				      const unsigned char *, unsigned);
+isc_result_t omapi_connection_flush (omapi_object_t *);
+isc_result_t omapi_connection_get_uint32 (omapi_object_t *, u_int32_t *);
+isc_result_t omapi_connection_put_uint32 (omapi_object_t *, u_int32_t);
+isc_result_t omapi_connection_get_uint16 (omapi_object_t *, u_int16_t *);
+isc_result_t omapi_connection_put_uint16 (omapi_object_t *, u_int32_t);
+