1/* 2 * Packet interface 3 * Copyright (C) 1999 Kunihiro Ishiguro 4 * 5 * This file is part of GNU Zebra. 6 * 7 * GNU Zebra is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2, or (at your option) any 10 * later version. 11 * 12 * GNU Zebra is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with GNU Zebra; see the file COPYING. If not, write to the Free 19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 20 * 02111-1307, USA. 21 */ 22 23#ifndef _ZEBRA_STREAM_H 24#define _ZEBRA_STREAM_H 25 26/* Stream buffer. */ 27struct stream 28{ 29 struct stream *next; 30 31 unsigned char *data; 32 33 /* Put pointer. */ 34 unsigned long putp; 35 36 /* Get pointer. */ 37 unsigned long getp; 38 39 /* End of pointer. */ 40 unsigned long endp; 41 42 /* Data size. */ 43 unsigned long size; 44}; 45 46/* First in first out queue structure. */ 47struct stream_fifo 48{ 49 unsigned long count; 50 51 struct stream *head; 52 struct stream *tail; 53}; 54 55/* Utility macros. */ 56#define STREAM_PNT(S) ((S)->data + (S)->getp) 57#define STREAM_SIZE(S) ((S)->size) 58#define STREAM_REMAIN(S) ((S)->size - (S)->putp) 59#define STREAM_DATA(S) ((S)->data) 60 61/* Stream prototypes. */ 62struct stream *stream_new (size_t); 63void stream_free (struct stream *); 64 65unsigned long stream_get_getp (struct stream *); 66unsigned long stream_get_putp (struct stream *); 67unsigned long stream_get_endp (struct stream *); 68unsigned long stream_get_size (struct stream *); 69u_char *stream_get_data (struct stream *); 70 71void stream_set_getp (struct stream *, unsigned long); 72void stream_set_putp (struct stream *, unsigned long); 73 74void stream_forward (struct stream *, int); 75 76void stream_put (struct stream *, void *, size_t); 77int stream_putc (struct stream *, u_char); 78int stream_putc_at (struct stream *, unsigned long, u_char); 79int stream_putw (struct stream *, u_int16_t); 80int stream_putw_at (struct stream *, unsigned long, u_int16_t); 81int stream_putl (struct stream *, u_int32_t); 82int stream_putl_at (struct stream *, unsigned long, u_int32_t); 83int stream_put_ipv4 (struct stream *, u_int32_t); 84int stream_put_in_addr (struct stream *, struct in_addr *); 85 86void stream_get (void *, struct stream *, size_t); 87u_char stream_getc (struct stream *); 88u_char stream_getc_from (struct stream *, unsigned long); 89u_int16_t stream_getw (struct stream *); 90u_int16_t stream_getw_from (struct stream *, unsigned long); 91u_int32_t stream_getl (struct stream *); 92u_int32_t stream_get_ipv4 (struct stream *); 93 94#undef stream_read 95#undef stream_write 96int stream_read (struct stream *, int, size_t); 97int stream_read_unblock (struct stream *, int, size_t); 98int stream_write (struct stream *, u_char *, size_t); 99 100u_char *stream_pnt (struct stream *); 101void stream_reset (struct stream *); 102int stream_flush (struct stream *, int); 103int stream_empty (struct stream *); 104 105/* Stream fifo. */ 106struct stream_fifo *stream_fifo_new (); 107void stream_fifo_push (struct stream_fifo *fifo, struct stream *s); 108struct stream *stream_fifo_pop (struct stream_fifo *fifo); 109struct stream *stream_fifo_head (struct stream_fifo *fifo); 110void stream_fifo_clean (struct stream_fifo *fifo); 111void stream_fifo_free (struct stream_fifo *fifo); 112 113#endif /* _ZEBRA_STREAM_H */ 114