| /* $Id$ */ |
| |
| /* Copyright 1998 by the Massachusetts Institute of Technology. |
| * |
| * Permission to use, copy, modify, and distribute this |
| * software and its documentation for any purpose and without |
| * fee is hereby granted, provided that the above copyright |
| * notice appear in all copies and that both that copyright |
| * notice and this permission notice appear in supporting |
| * documentation, and that the name of M.I.T. not be used in |
| * advertising or publicity pertaining to distribution of the |
| * software without specific, written prior permission. |
| * M.I.T. makes no representations about the suitability of |
| * this software for any purpose. It is provided "as is" |
| * without express or implied warranty. |
| */ |
| |
| #include "setup.h" |
| |
| #if defined(WIN32) && !defined(WATT32) |
| #include "nameser.h" |
| #else |
| #include <netinet/in.h> |
| #include <arpa/nameser.h> |
| #endif |
| |
| #include <string.h> |
| #include <stdlib.h> |
| #include "ares.h" |
| #include "ares_private.h" /* for the memdebug */ |
| |
| /* Simply decodes a length-encoded character string. The first byte of the |
| * input is the length of the string to be returned and the bytes thereafter |
| * are the characters of the string. The returned result will be NULL |
| * terminated. |
| */ |
| int ares_expand_string(const unsigned char *encoded, |
| const unsigned char *abuf, |
| int alen, |
| unsigned char **s, |
| long *enclen) |
| { |
| unsigned char *q; |
| long len; |
| if (encoded == abuf+alen) |
| return ARES_EBADSTR; |
| |
| len = *encoded; |
| if (encoded+len+1 > abuf+alen) |
| return ARES_EBADSTR; |
| |
| encoded++; |
| |
| *s = malloc(len+1); |
| if (*s == NULL) |
| return ARES_ENOMEM; |
| q = *s; |
| strncpy((char *)q, (char *)encoded, len); |
| q[len] = '\0'; |
| |
| *s = q; |
| |
| *enclen = len+1; |
| |
| return ARES_SUCCESS; |
| } |
| |