stream.h
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上传日期:2009-11-15
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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 */