1 /* $OpenBSD: buffer.h,v 1.13 2005/03/14 11:46:56 markus Exp $ */
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
7 * Code for manipulating FIFO buffers.
9 * As far as I am concerned, the code I have written for this software
10 * can be used freely for any purpose. Any derived versions of this
11 * software must be clearly marked as such, and if the derived work is
12 * incompatible with the protocol description in the RFC file, it must be
13 * called by a name other than "ssh" or "Secure Shell".
20 u_char *buf; /* Buffer for data. */
21 u_int alloc; /* Number of bytes allocated for data. */
22 u_int offset; /* Offset of first byte containing data. */
23 u_int end; /* Offset of last byte containing data. */
26 #define BUFFER_MAX_CHUNK 0x100000 /*1MB*/
27 #define BUFFER_MAX_LEN 0xa00000 /*10MB*/
29 /* this value for BUFFER_MAX_HPN_LEN is */
30 /* still undersized for the faster networks */
31 /* it might make sense to have yet another */
32 /* MAX_LEN for 10+GB networks. Something closer to */
33 /* 128MB or 192MB -cjr*/
34 #define BUFFER_MAX_HPN_LEN 0x2000000 /*32MB*/
36 void buffer_init(Buffer *);
37 void buffer_clear(Buffer *);
38 void buffer_free(Buffer *);
40 u_int buffer_len(Buffer *);
41 void *buffer_ptr(Buffer *);
43 void buffer_append(Buffer *, const void *, u_int);
44 void *buffer_append_space(Buffer *, u_int);
46 void buffer_get(Buffer *, void *, u_int);
48 void buffer_consume(Buffer *, u_int);
49 void buffer_consume_end(Buffer *, u_int);
51 void buffer_dump(Buffer *);
53 int buffer_get_ret(Buffer *, void *, u_int);
54 int buffer_consume_ret(Buffer *, u_int);
55 int buffer_consume_end_ret(Buffer *, u_int);