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/*
* Packet interface
* Copyright (C) 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your option) any
* later version.
*
* GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _ZEBRA_STREAM_H
#define _ZEBRA_STREAM_H
/* Stream buffer. */
struct stream
{
struct stream *next;
unsigned char *data;
/* Put pointer. */
unsigned long putp;
/* Get pointer. */
unsigned long getp;
/* End of pointer. */
unsigned long endp;
/* Data size. */
unsigned long size;
};
/* First in first out queue structure. */
struct stream_fifo
{
unsigned long count;
struct stream *head;
struct stream *tail;
};
/* Utility macros. */
#define STREAM_PNT(S) ((S)->data + (S)->getp)
#define STREAM_SIZE(S) ((S)->size)
#define STREAM_REMAIN(S) ((S)->size - (S)->putp)
#define STREAM_DATA(S) ((S)->data)
/* Stream prototypes. */
struct stream *stream_new (size_t);
void stream_free (struct stream *);
unsigned long stream_get_getp (struct stream *);
unsigned long stream_get_putp (struct stream *);
unsigned long stream_get_endp (struct stream *);
unsigned long stream_get_size (struct stream *);
u_char *stream_get_data (struct stream *);
void stream_set_getp (struct stream *, unsigned long);
void stream_set_putp (struct stream *, unsigned long);
void stream_forward (struct stream *, int);
void stream_put (struct stream *, void *, size_t);
int stream_putc (struct stream *, u_char);
int stream_putc_at (struct stream *, unsigned long, u_char);
int stream_putw (struct stream *, u_int16_t);
int stream_putw_at (struct stream *, unsigned long, u_int16_t);
int stream_putl (struct stream *, u_int32_t);
int stream_putl_at (struct stream *, unsigned long, u_int32_t);
int stream_put_ipv4 (struct stream *, u_int32_t);
int stream_put_in_addr (struct stream *, struct in_addr *);
void stream_get (void *, struct stream *, size_t);
u_char stream_getc (struct stream *);
u_char stream_getc_from (struct stream *, unsigned long);
u_int16_t stream_getw (struct stream *);
u_int16_t stream_getw_from (struct stream *, unsigned long);
u_int32_t stream_getl (struct stream *);
u_int32_t stream_get_ipv4 (struct stream *);
#undef stream_read
#undef stream_write
int stream_read (struct stream *, int, size_t);
int stream_read_unblock (struct stream *, int, size_t);
int stream_write (struct stream *, u_char *, size_t);
u_char *stream_pnt (struct stream *);
void stream_reset (struct stream *);
int stream_flush (struct stream *, int);
int stream_empty (struct stream *);
/* Stream fifo. */
struct stream_fifo *stream_fifo_new ();
void stream_fifo_push (struct stream_fifo *fifo, struct stream *s);
struct stream *stream_fifo_pop (struct stream_fifo *fifo);
struct stream *stream_fifo_head (struct stream_fifo *fifo);
void stream_fifo_clean (struct stream_fifo *fifo);
void stream_fifo_free (struct stream_fifo *fifo);
#endif /* _ZEBRA_STREAM_H */
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