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-rw-r--r--openvpn/buffer.c743
1 files changed, 0 insertions, 743 deletions
diff --git a/openvpn/buffer.c b/openvpn/buffer.c
deleted file mode 100644
index cfff06e..0000000
--- a/openvpn/buffer.c
+++ /dev/null
@@ -1,743 +0,0 @@
-/*
- * OpenVPN -- An application to securely tunnel IP networks
- * over a single UDP port, with support for SSL/TLS-based
- * session authentication and key exchange,
- * packet encryption, packet authentication, and
- * packet compression.
- *
- * Copyright (C) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program 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 this program (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifdef WIN32
-#include "config-win32.h"
-#else
-#include "config.h"
-#endif
-
-#include "syshead.h"
-
-#include "common.h"
-#include "buffer.h"
-#include "error.h"
-#include "mtu.h"
-#include "thread.h"
-
-#include "memdbg.h"
-
-struct buffer
-#ifdef DMALLOC
-alloc_buf_debug (size_t size, const char *file, int line)
-#else
-alloc_buf (size_t size)
-#endif
-{
-#ifdef DMALLOC
- return alloc_buf_gc_debug (size, NULL, file, line);
-#else
- return alloc_buf_gc (size, NULL);
-#endif
-}
-
-struct buffer
-#ifdef DMALLOC
-alloc_buf_gc_debug (size_t size, struct gc_arena *gc, const char *file, int line)
-#else
-alloc_buf_gc (size_t size, struct gc_arena *gc)
-#endif
-{
- struct buffer buf;
- buf.capacity = (int)size;
- buf.offset = 0;
- buf.len = 0;
-#ifdef DMALLOC
- buf.data = (uint8_t *) gc_malloc_debug (size, false, gc, file, line);
-#else
- buf.data = (uint8_t *) gc_malloc (size, false, gc);
-#endif
- if (size)
- *buf.data = 0;
- return buf;
-}
-
-struct buffer
-#ifdef DMALLOC
-clone_buf_debug (const struct buffer* buf, const char *file, int line)
-#else
-clone_buf (const struct buffer* buf)
-#endif
-{
- struct buffer ret;
- ret.capacity = buf->capacity;
- ret.offset = buf->offset;
- ret.len = buf->len;
-#ifdef DMALLOC
- ret.data = (uint8_t *) openvpn_dmalloc (file, line, buf->capacity);
-#else
- ret.data = (uint8_t *) malloc (buf->capacity);
-#endif
- check_malloc_return (ret.data);
- memcpy (BPTR (&ret), BPTR (buf), BLEN (buf));
- return ret;
-}
-
-#ifdef BUF_INIT_TRACKING
-
-bool
-buf_init_debug (struct buffer *buf, int offset, const char *file, int line)
-{
- buf->debug_file = file;
- buf->debug_line = line;
- return buf_init_dowork (buf, offset);
-}
-
-static inline int
-buf_debug_line (const struct buffer *buf)
-{
- return buf->debug_line;
-}
-
-static const char *
-buf_debug_file (const struct buffer *buf)
-{
- return buf->debug_file;
-}
-
-#else
-
-#define buf_debug_line(buf) 0
-#define buf_debug_file(buf) "[UNDEF]"
-
-#endif
-
-void
-buf_clear (struct buffer *buf)
-{
- if (buf->capacity > 0)
- memset (buf->data, 0, buf->capacity);
- buf->len = 0;
- buf->offset = 0;
-}
-
-bool
-buf_assign (struct buffer *dest, const struct buffer *src)
-{
- if (!buf_init (dest, src->offset))
- return false;
- return buf_write (dest, BPTR (src), BLEN (src));
-}
-
-struct buffer
-clear_buf ()
-{
- struct buffer buf;
- CLEAR (buf);
- return buf;
-}
-
-void
-free_buf (struct buffer *buf)
-{
- if (buf->data)
- free (buf->data);
- CLEAR (*buf);
-}
-
-/*
- * Return a buffer for write that is a subset of another buffer
- */
-struct buffer
-buf_sub (struct buffer *buf, int size, bool prepend)
-{
- struct buffer ret;
- uint8_t *data;
-
- CLEAR (ret);
- data = prepend ? buf_prepend (buf, size) : buf_write_alloc (buf, size);
- if (data)
- {
- ret.capacity = size;
- ret.data = data;
- }
- return ret;
-}
-
-/*
- * printf append to a buffer with overflow check
- */
-void
-buf_printf (struct buffer *buf, const char *format, ...)
-{
- if (buf_defined (buf))
- {
- va_list arglist;
- uint8_t *ptr = BEND (buf);
- int cap = buf_forward_capacity (buf);
-
- if (cap > 0)
- {
- va_start (arglist, format);
- vsnprintf ((char *)ptr, cap, format, arglist);
- va_end (arglist);
- *(buf->data + buf->capacity - 1) = 0; /* windows vsnprintf needs this */
- buf->len += (int) strlen ((char *)ptr);
- }
- }
-}
-
-/*
- * This is necessary due to certain buggy implementations of snprintf,
- * that don't guarantee null termination for size > 0.
- */
-
-int openvpn_snprintf(char *str, size_t size, const char *format, ...)
-{
- va_list arglist;
- int ret = 0;
- if (size > 0)
- {
- va_start (arglist, format);
- ret = vsnprintf (str, size, format, arglist);
- va_end (arglist);
- str[size - 1] = 0;
- }
- return ret;
-}
-
-/*
- * write a string to the end of a buffer that was
- * truncated by buf_printf
- */
-void
-buf_catrunc (struct buffer *buf, const char *str)
-{
- if (buf_forward_capacity (buf) <= 1)
- {
- int len = (int) strlen (str) + 1;
- if (len < buf_forward_capacity_total (buf))
- {
- strncpynt ((char *)(buf->data + buf->capacity - len), str, len);
- }
- }
-}
-
-/*
- * convert a multi-line output to one line
- */
-void
-convert_to_one_line (struct buffer *buf)
-{
- uint8_t *cp = BPTR(buf);
- int len = BLEN(buf);
- while (len--)
- {
- if (*cp == '\n')
- *cp = '|';
- ++cp;
- }
-}
-
-/* NOTE: requires that string be null terminated */
-void
-buf_write_string_file (const struct buffer *buf, const char *filename, int fd)
-{
- const int len = strlen ((char *) BPTR (buf));
- const int size = write (fd, BPTR (buf), len);
- if (size != len)
- msg (M_ERR, "Write error on file '%s'", filename);
-}
-
-/*
- * Garbage collection
- */
-
-void *
-#ifdef DMALLOC
-gc_malloc_debug (size_t size, bool clear, struct gc_arena *a, const char *file, int line)
-#else
-gc_malloc (size_t size, bool clear, struct gc_arena *a)
-#endif
-{
- void *ret;
- if (a)
- {
- struct gc_entry *e;
-#ifdef DMALLOC
- e = (struct gc_entry *) openvpn_dmalloc (file, line, size + sizeof (struct gc_entry));
-#else
- e = (struct gc_entry *) malloc (size + sizeof (struct gc_entry));
-#endif
- check_malloc_return (e);
- ret = (char *) e + sizeof (struct gc_entry);
- /*mutex_lock_static (L_GC_MALLOC);*/
- e->next = a->list;
- a->list = e;
- /*mutex_unlock_static (L_GC_MALLOC);*/
- }
- else
- {
-#ifdef DMALLOC
- ret = openvpn_dmalloc (file, line, size);
-#else
- ret = malloc (size);
-#endif
- check_malloc_return (ret);
- }
-#ifndef ZERO_BUFFER_ON_ALLOC
- if (clear)
-#endif
- memset (ret, 0, size);
- return ret;
-}
-
-void
-x_gc_free (struct gc_arena *a)
-{
- struct gc_entry *e;
- /*mutex_lock_static (L_GC_MALLOC);*/
- e = a->list;
- a->list = NULL;
- /*mutex_unlock_static (L_GC_MALLOC);*/
-
- while (e != NULL)
- {
- struct gc_entry *next = e->next;
- free (e);
- e = next;
- }
-}
-
-/*
- * Hex dump -- Output a binary buffer to a hex string and return it.
- */
-
-char *
-format_hex_ex (const uint8_t *data, int size, int maxoutput,
- int space_break, const char* separator,
- struct gc_arena *gc)
-{
- struct buffer out = alloc_buf_gc (maxoutput ? maxoutput :
- ((size * 2) + (size / space_break) * (int) strlen (separator) + 2),
- gc);
- int i;
- for (i = 0; i < size; ++i)
- {
- if (separator && i && !(i % space_break))
- buf_printf (&out, "%s", separator);
- buf_printf (&out, "%02x", data[i]);
- }
- buf_catrunc (&out, "[more...]");
- return (char *)out.data;
-}
-
-/*
- * remove specific trailing character
- */
-
-void
-buf_rmtail (struct buffer *buf, uint8_t remove)
-{
- uint8_t *cp = BLAST(buf);
- if (cp && *cp == remove)
- {
- *cp = '\0';
- --buf->len;
- }
-}
-
-/*
- * force a null termination even it requires
- * truncation of the last char.
- */
-void
-buf_null_terminate (struct buffer *buf)
-{
- char *last = (char *) BLAST (buf);
- if (last && *last == '\0') /* already terminated? */
- return;
-
- if (!buf_safe (buf, 1)) /* make space for trailing null */
- buf_inc_len (buf, -1);
-
- buf_write_u8 (buf, 0);
-}
-
-/*
- * Remove trailing \r and \n chars and ensure
- * null termination.
- */
-void
-buf_chomp (struct buffer *buf)
-{
- while (true)
- {
- char *last = (char *) BLAST (buf);
- if (!last)
- break;
- if (char_class (*last, CC_CRLF|CC_NULL))
- {
- if (!buf_inc_len (buf, -1))
- break;
- }
- else
- break;
- }
- buf_null_terminate (buf);
-}
-
-/*
- * like buf_null_terminate, but operate on strings
- */
-void
-string_null_terminate (char *str, int len, int capacity)
-{
- ASSERT (len >= 0 && len <= capacity && capacity > 0);
- if (len < capacity)
- *(str + len) = '\0';
- else if (len == capacity)
- *(str + len - 1) = '\0';
-}
-
-/*
- * Remove trailing \r and \n chars.
- */
-void
-chomp (char *str)
-{
- bool modified;
- do {
- const int len = strlen (str);
- modified = false;
- if (len > 0)
- {
- char *cp = str + (len - 1);
- if (*cp == '\n' || *cp == '\r')
- {
- *cp = '\0';
- modified = true;
- }
- }
- } while (modified);
-}
-
-/*
- * Allocate a string
- */
-char *
-#ifdef DMALLOC
-string_alloc_debug (const char *str, struct gc_arena *gc, const char *file, int line)
-#else
-string_alloc (const char *str, struct gc_arena *gc)
-#endif
-{
- if (str)
- {
- const int n = strlen (str) + 1;
- char *ret;
-
-#ifdef DMALLOC
- ret = (char *) gc_malloc_debug (n, false, gc, file, line);
-#else
- ret = (char *) gc_malloc (n, false, gc);
-#endif
- memcpy (ret, str, n);
- return ret;
- }
- else
- return NULL;
-}
-
-/*
- * Allocate a string inside a buffer
- */
-struct buffer
-#ifdef DMALLOC
-string_alloc_buf_debug (const char *str, struct gc_arena *gc, const char *file, int line)
-#else
-string_alloc_buf (const char *str, struct gc_arena *gc)
-#endif
-{
- struct buffer buf;
-
- ASSERT (str);
-
-#ifdef DMALLOC
- buf_set_read (&buf, (uint8_t*) string_alloc_debug (str, gc, file, line), strlen (str) + 1);
-#else
- buf_set_read (&buf, (uint8_t*) string_alloc (str, gc), strlen (str) + 1);
-#endif
-
- if (buf.len > 0) /* Don't count trailing '\0' as part of length */
- --buf.len;
-
- return buf;
-}
-
-/*
- * String comparison
- */
-
-bool
-buf_string_match_head_str (const struct buffer *src, const char *match)
-{
- const int size = strlen (match);
- if (size < 0 || size > src->len)
- return false;
- return memcmp (BPTR (src), match, size) == 0;
-}
-
-bool
-buf_string_compare_advance (struct buffer *src, const char *match)
-{
- if (buf_string_match_head_str (src, match))
- {
- buf_advance (src, strlen (match));
- return true;
- }
- else
- return false;
-}
-
-int
-buf_substring_len (const struct buffer *buf, int delim)
-{
- int i = 0;
- struct buffer tmp = *buf;
- int c;
-
- while ((c = buf_read_u8 (&tmp)) >= 0)
- {
- ++i;
- if (c == delim)
- return i;
- }
- return -1;
-}
-
-/*
- * String parsing
- */
-
-bool
-buf_parse (struct buffer *buf, const int delim, char *line, const int size)
-{
- bool eol = false;
- int n = 0;
- int c;
-
- ASSERT (size > 0);
-
- do
- {
- c = buf_read_u8 (buf);
- if (c < 0)
- eol = true;
- if (c <= 0 || c == delim)
- c = 0;
- if (n >= size)
- break;
- line[n++] = c;
- }
- while (c);
-
- line[size-1] = '\0';
- return !(eol && !strlen (line));
-}
-
-/*
- * Classify and mutate strings based on character types.
- */
-
-bool
-char_class (const char c, const unsigned int flags)
-{
- if (!flags)
- return false;
- if (flags & CC_ANY)
- return true;
-
- if ((flags & CC_NULL) && c == '\0')
- return true;
-
- if ((flags & CC_ALNUM) && isalnum (c))
- return true;
- if ((flags & CC_ALPHA) && isalpha (c))
- return true;
- if ((flags & CC_ASCII) && isascii (c))
- return true;
- if ((flags & CC_CNTRL) && iscntrl (c))
- return true;
- if ((flags & CC_DIGIT) && isdigit (c))
- return true;
- if ((flags & CC_PRINT) && isprint (c))
- return true;
- if ((flags & CC_PUNCT) && ispunct (c))
- return true;
- if ((flags & CC_SPACE) && isspace (c))
- return true;
- if ((flags & CC_XDIGIT) && isxdigit (c))
- return true;
-
- if ((flags & CC_BLANK) && (c == ' ' || c == '\t'))
- return true;
- if ((flags & CC_NEWLINE) && c == '\n')
- return true;
- if ((flags & CC_CR) && c == '\r')
- return true;
-
- if ((flags & CC_BACKSLASH) && c == '\\')
- return true;
- if ((flags & CC_UNDERBAR) && c == '_')
- return true;
- if ((flags & CC_DASH) && c == '-')
- return true;
- if ((flags & CC_DOT) && c == '.')
- return true;
- if ((flags & CC_COMMA) && c == ',')
- return true;
- if ((flags & CC_COLON) && c == ':')
- return true;
- if ((flags & CC_SLASH) && c == '/')
- return true;
- if ((flags & CC_SINGLE_QUOTE) && c == '\'')
- return true;
- if ((flags & CC_DOUBLE_QUOTE) && c == '\"')
- return true;
- if ((flags & CC_REVERSE_QUOTE) && c == '`')
- return true;
- if ((flags & CC_AT) && c == '@')
- return true;
- if ((flags & CC_EQUAL) && c == '=')
- return true;
-
- return false;
-}
-
-static inline bool
-char_inc_exc (const char c, const unsigned int inclusive, const unsigned int exclusive)
-{
- return char_class (c, inclusive) && !char_class (c, exclusive);
-}
-
-bool
-string_class (const char *str, const unsigned int inclusive, const unsigned int exclusive)
-{
- char c;
- ASSERT (str);
- while ((c = *str++))
- {
- if (!char_inc_exc (c, inclusive, exclusive))
- return false;
- }
- return true;
-}
-
-/*
- * Modify string in place.
- * Guaranteed to not increase string length.
- */
-bool
-string_mod (char *str, const unsigned int inclusive, const unsigned int exclusive, const char replace)
-{
- const char *in = str;
- bool ret = true;
-
- ASSERT (str);
-
- while (true)
- {
- char c = *in++;
- if (c)
- {
- if (!char_inc_exc (c, inclusive, exclusive))
- {
- c = replace;
- ret = false;
- }
- if (c)
- *str++ = c;
- }
- else
- {
- *str = '\0';
- break;
- }
- }
- return ret;
-}
-
-const char *
-string_mod_const (const char *str,
- const unsigned int inclusive,
- const unsigned int exclusive,
- const char replace,
- struct gc_arena *gc)
-{
- if (str)
- {
- char *buf = string_alloc (str, gc);
- string_mod (buf, inclusive, exclusive, replace);
- return buf;
- }
- else
- return NULL;
-}
-
-#ifdef CHARACTER_CLASS_DEBUG
-
-#define CC_INCLUDE (CC_PRINT)
-#define CC_EXCLUDE (0)
-#define CC_REPLACE ('.')
-
-void
-character_class_debug (void)
-{
- char buf[256];
-
- while (fgets (buf, sizeof (buf), stdin) != NULL)
- {
- string_mod (buf, CC_INCLUDE, CC_EXCLUDE, CC_REPLACE);
- printf ("%s", buf);
- }
-}
-
-#endif
-
-#ifdef VERIFY_ALIGNMENT
-void
-valign4 (const struct buffer *buf, const char *file, const int line)
-{
- if (buf && buf->len)
- {
- int msglevel = D_ALIGN_DEBUG;
- const unsigned int u = (unsigned int) BPTR (buf);
-
- if (u & (PAYLOAD_ALIGN-1))
- msglevel = D_ALIGN_ERRORS;
-
- msg (msglevel, "%sAlignment at %s/%d ptr=" ptr_format " OLC=%d/%d/%d I=%s/%d",
- (msglevel == D_ALIGN_ERRORS) ? "ERROR: " : "",
- file,
- line,
- (ptr_type)buf->data,
- buf->offset,
- buf->len,
- buf->capacity,
- buf_debug_file (buf),
- buf_debug_line (buf));
- }
-}
-#endif
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