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Diffstat (limited to 'sys/contrib/ngatm/netnatm/unimsg.h')
-rw-r--r-- | sys/contrib/ngatm/netnatm/unimsg.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sys/contrib/ngatm/netnatm/unimsg.h b/sys/contrib/ngatm/netnatm/unimsg.h new file mode 100644 index 0000000..efc91c5 --- /dev/null +++ b/sys/contrib/ngatm/netnatm/unimsg.h @@ -0,0 +1,92 @@ +/* + * Copyright (c) 1996-2003 + * Fraunhofer Institute for Open Communication Systems (FhG Fokus). + * All rights reserved. + * + * Author: Hartmut Brandt <harti@freebsd.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Begemot: libunimsg/netnatm/unimsg.h,v 1.4 2004/07/08 08:21:46 brandt Exp $ + * + * This defines the structure of messages as handled by this library. + */ +#ifndef _NETNATM_UNIMSG_H_ +#define _NETNATM_UNIMSG_H_ + +#include <sys/types.h> +#ifdef _KERNEL +#ifdef __FreeBSD__ +#include <sys/systm.h> +#endif +#include <sys/stdint.h> +#else +#include <string.h> +#include <stdint.h> +#endif + +struct uni_msg { + u_char *b_wptr; /* tail pointer */ + u_char *b_rptr; /* head pointer */ + u_char *b_buf; /* data buffer */ + u_char *b_lim; /* end of data buffer */ +}; + +/* return the current length of the message */ +#define uni_msg_len(M) ((size_t)((M)->b_wptr - (M)->b_rptr)) + +/* return the number of space behind the message */ +#define uni_msg_space(M) ((size_t)((M)->b_lim - (M)->b_wptr)) + +/* return the amount of leading free space */ +#define uni_msg_leading(M) ((size_t)((M)->b_rptr - (M)->b_buf)) + +/* return the maximum size of the message (length plus free space) */ +#define uni_msg_size(M) ((size_t)((M)->b_lim - (M)->b_buf)); + +/* ensure that there is space for another S bytes. If reallocation fails + * free message and return -1 */ +#define uni_msg_ensure(M, S) \ + ((uni_msg_space(M) >= (S)) ? 0 : uni_msg_extend(M, S)) + +int uni_msg_append(struct uni_msg *, void *, size_t); +int uni_msg_extend(struct uni_msg *, size_t); + +#define uni_msg_rptr(MSG, TYPE) ((TYPE)(void *)(MSG)->b_rptr) +#define uni_msg_wptr(MSG, TYPE) ((TYPE)(void *)(MSG)->b_wptr) + +int uni_msg_prepend(struct uni_msg *, size_t); + +#ifndef _KERNEL + +struct uni_msg *uni_msg_alloc(size_t); +struct uni_msg *uni_msg_build(void *, ...); +void uni_msg_destroy(struct uni_msg *); +u_int uni_msg_strip32(struct uni_msg *); +u_int uni_msg_get32(struct uni_msg *); +int uni_msg_append32(struct uni_msg *, u_int); +int uni_msg_append8(struct uni_msg *, u_int); +u_int uni_msg_trail32(const struct uni_msg *, int); +struct uni_msg *uni_msg_dup(const struct uni_msg *); + +#endif /* _KERNEL */ +#endif |