/* * 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 |