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authorAlex Wilson <alex.wilson@joyent.com>2015-08-11 00:23:16 +0000
committerAlex Wilson <alex.wilson@joyent.com>2015-09-03 14:05:34 -0700
commitd0c1b872bd54d7989a1f97af5d5d86ec4a13cabe (patch)
tree76af59311a3eb0011f3012489d059212ea21cd21 /usr/src/cmd/ssh/libssh/common/buffer.c
parent42d2cb6faf809f84bbfd0fd73fe6f644b8417053 (diff)
downloadillumos-joyent-d0c1b872bd54d7989a1f97af5d5d86ec4a13cabe.tar.gz
OS-4689 Remove SunSSH from illumos-joyent
OS-4688 Switch platform over to using recent OpenSSH Reviewed by: Robert Mustacchi <rm@joyent.com>
Diffstat (limited to 'usr/src/cmd/ssh/libssh/common/buffer.c')
-rw-r--r--usr/src/cmd/ssh/libssh/common/buffer.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/usr/src/cmd/ssh/libssh/common/buffer.c b/usr/src/cmd/ssh/libssh/common/buffer.c
deleted file mode 100644
index 2ec761b7ad..0000000000
--- a/usr/src/cmd/ssh/libssh/common/buffer.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- * All rights reserved
- * Functions for manipulating fifo buffers (that can grow if needed).
- *
- * As far as I am concerned, the code I have written for this software
- * can be used freely for any purpose. Any derived versions of this
- * software must be clearly marked as such, and if the derived work is
- * incompatible with the protocol description in the RFC file, it must be
- * called by a name other than "ssh" or "Secure Shell".
- */
-/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-/* $OpenBSD: buffer.c,v 1.31 2006/08/03 03:34:41 deraadt Exp $ */
-
-#include "includes.h"
-
-#include "xmalloc.h"
-#include "buffer.h"
-#include "log.h"
-
-#define BUFFER_MAX_CHUNK 0x100000
-#define BUFFER_MAX_LEN 0xa00000
-#define BUFFER_ALLOCSZ 0x008000
-
-/* Initializes the buffer structure. */
-
-void
-buffer_init(Buffer *buffer)
-{
- const u_int len = 4096;
-
- buffer->alloc = 0;
- buffer->buf = xmalloc(len);
- buffer->alloc = len;
- buffer->offset = 0;
- buffer->end = 0;
-}
-
-/* Frees any memory used for the buffer. */
-
-void
-buffer_free(Buffer *buffer)
-{
- if (buffer->alloc > 0) {
- memset(buffer->buf, 0, buffer->alloc);
- buffer->alloc = 0;
- xfree(buffer->buf);
- }
-}
-
-/*
- * Clears any data from the buffer, making it empty. This does not actually
- * zero the memory.
- */
-
-void
-buffer_clear(Buffer *buffer)
-{
- buffer->offset = 0;
- buffer->end = 0;
-}
-
-/* Appends data to the buffer, expanding it if necessary. */
-
-void
-buffer_append(Buffer *buffer, const void *data, u_int len)
-{
- void *p;
- p = buffer_append_space(buffer, len);
- memcpy(p, data, len);
-}
-
-static int
-buffer_compact(Buffer *buffer)
-{
- /*
- * If the buffer is quite empty, but all data is at the end, move the
- * data to the beginning.
- */
- if (buffer->offset > MIN(buffer->alloc, BUFFER_MAX_CHUNK)) {
- memmove(buffer->buf, buffer->buf + buffer->offset,
- buffer->end - buffer->offset);
- buffer->end -= buffer->offset;
- buffer->offset = 0;
- return (1);
- }
- return (0);
-}
-
-/*
- * Appends space to the buffer, expanding the buffer if necessary. This does
- * not actually copy the data into the buffer, but instead returns a pointer
- * to the allocated region.
- */
-
-void *
-buffer_append_space(Buffer *buffer, u_int len)
-{
- u_int newlen;
- void *p;
-
- if (len > BUFFER_MAX_CHUNK)
- fatal("buffer_append_space: len %u not supported", len);
-
- /* If the buffer is empty, start using it from the beginning. */
- if (buffer->offset == buffer->end) {
- buffer->offset = 0;
- buffer->end = 0;
- }
-restart:
- /* If there is enough space to store all data, store it now. */
- if (buffer->end + len < buffer->alloc) {
- p = buffer->buf + buffer->end;
- buffer->end += len;
- return p;
- }
-
- /* Compact data back to the start of the buffer if necessary */
- if (buffer_compact(buffer))
- goto restart;
-
- /* Increase the size of the buffer and retry. */
- newlen = roundup(buffer->alloc + len, BUFFER_ALLOCSZ);
- if (newlen > BUFFER_MAX_LEN)
- fatal("buffer_append_space: alloc %u not supported",
- newlen);
- buffer->buf = xrealloc(buffer->buf, newlen);
- buffer->alloc = newlen;
- goto restart;
- /* NOTREACHED */
-}
-
-/*
- * Check whether an allocation of 'len' will fit in the buffer
- * This must follow the same math as buffer_append_space
- */
-int
-buffer_check_alloc(Buffer *buffer, u_int len)
-{
- if (buffer->offset == buffer->end) {
- buffer->offset = 0;
- buffer->end = 0;
- }
- restart:
- if (buffer->end + len < buffer->alloc)
- return (1);
- if (buffer_compact(buffer))
- goto restart;
- if (roundup(buffer->alloc + len, BUFFER_ALLOCSZ) <= BUFFER_MAX_LEN)
- return (1);
- return (0);
-}
-
-/* Returns the number of bytes of data in the buffer. */
-
-u_int
-buffer_len(Buffer *buffer)
-{
- return buffer->end - buffer->offset;
-}
-
-/* Gets data from the beginning of the buffer. */
-
-int
-buffer_get_ret(Buffer *buffer, void *buf, u_int len)
-{
- if (len > buffer->end - buffer->offset) {
- error("buffer_get_ret: trying to get more bytes %d than in buffer %d",
- len, buffer->end - buffer->offset);
- return (-1);
- }
- memcpy(buf, buffer->buf + buffer->offset, len);
- buffer->offset += len;
- return (0);
-}
-
-void
-buffer_get(Buffer *buffer, void *buf, u_int len)
-{
- if (buffer_get_ret(buffer, buf, len) == -1)
- fatal("buffer_get: buffer error");
-}
-
-/* Consumes the given number of bytes from the beginning of the buffer. */
-
-int
-buffer_consume_ret(Buffer *buffer, u_int bytes)
-{
- if (bytes > buffer->end - buffer->offset) {
- error("buffer_consume_ret: trying to get more bytes than in buffer");
- return (-1);
- }
- buffer->offset += bytes;
- return (0);
-}
-
-void
-buffer_consume(Buffer *buffer, u_int bytes)
-{
- if (buffer_consume_ret(buffer, bytes) == -1)
- fatal("buffer_consume: buffer error");
-}
-
-/* Consumes the given number of bytes from the end of the buffer. */
-
-int
-buffer_consume_end_ret(Buffer *buffer, u_int bytes)
-{
- if (bytes > buffer->end - buffer->offset)
- return (-1);
- buffer->end -= bytes;
- return (0);
-}
-
-void
-buffer_consume_end(Buffer *buffer, u_int bytes)
-{
- if (buffer_consume_end_ret(buffer, bytes) == -1)
- fatal("buffer_consume_end: trying to get more bytes than in buffer");
-}
-
-/* Returns a pointer to the first used byte in the buffer. */
-
-void *
-buffer_ptr(Buffer *buffer)
-{
- return buffer->buf + buffer->offset;
-}
-
-/* Dumps the contents of the buffer to stderr. */
-void
-buffer_dump(Buffer *buffer)
-{
- u_int i;
- u_char *ucp = buffer->buf;
-
- for (i = buffer->offset; i < buffer->end; i++) {
- fprintf(stderr, "%02x", ucp[i]);
- if ((i-buffer->offset)%16==15)
- fprintf(stderr, "\n");
- else if ((i-buffer->offset)%2==1)
- fprintf(stderr, " ");
- }
-
- if (buffer->offset == buffer->end) {
- /* explicitly state when the buffer is empty */
- fprintf(stderr, "<EMPTY BUFFER>\n");
- } else {
- /* print the terminal '\n' if it wasn't already printed */
- if ((i - buffer->offset) % 16 != 0)
- fprintf(stderr, "\n");
- }
- /*
- * We want an extra empty line after the packet dump for better
- * readability.
- */
- fprintf(stderr, "\n");
-}