diff options
Diffstat (limited to 'deps/node/deps/cares/src/ares_parse_txt_reply.c')
-rw-r--r-- | deps/node/deps/cares/src/ares_parse_txt_reply.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/deps/node/deps/cares/src/ares_parse_txt_reply.c b/deps/node/deps/cares/src/ares_parse_txt_reply.c deleted file mode 100644 index 4856b4ce..00000000 --- a/deps/node/deps/cares/src/ares_parse_txt_reply.c +++ /dev/null @@ -1,220 +0,0 @@ - -/* Copyright 1998 by the Massachusetts Institute of Technology. - * Copyright (C) 2009 by Jakub Hrozek <jhrozek@redhat.com> - * - * 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 "ares_setup.h" - -#ifdef HAVE_NETINET_IN_H -# include <netinet/in.h> -#endif -#ifdef HAVE_NETDB_H -# include <netdb.h> -#endif -#ifdef HAVE_ARPA_INET_H -# include <arpa/inet.h> -#endif -#ifdef HAVE_ARPA_NAMESER_H -# include <arpa/nameser.h> -#else -# include "nameser.h" -#endif -#ifdef HAVE_ARPA_NAMESER_COMPAT_H -# include <arpa/nameser_compat.h> -#endif - -#ifdef HAVE_STRINGS_H -# include <strings.h> -#endif - -#include "ares.h" -#include "ares_dns.h" -#include "ares_data.h" -#include "ares_private.h" - -static int -ares__parse_txt_reply (const unsigned char *abuf, int alen, - int ex, void **txt_out) -{ - size_t substr_len; - unsigned int qdcount, ancount, i; - const unsigned char *aptr; - const unsigned char *strptr; - int status, rr_type, rr_class, rr_len; - long len; - char *hostname = NULL, *rr_name = NULL; - struct ares_txt_ext *txt_head = NULL; - struct ares_txt_ext *txt_last = NULL; - struct ares_txt_ext *txt_curr; - - /* Set *txt_out to NULL for all failure cases. */ - *txt_out = NULL; - - /* Give up if abuf doesn't have room for a header. */ - if (alen < HFIXEDSZ) - return ARES_EBADRESP; - - /* Fetch the question and answer count from the header. */ - qdcount = DNS_HEADER_QDCOUNT (abuf); - ancount = DNS_HEADER_ANCOUNT (abuf); - if (qdcount != 1) - return ARES_EBADRESP; - if (ancount == 0) - return ARES_ENODATA; - - /* Expand the name from the question, and skip past the question. */ - aptr = abuf + HFIXEDSZ; - status = ares_expand_name (aptr, abuf, alen, &hostname, &len); - if (status != ARES_SUCCESS) - return status; - - if (aptr + len + QFIXEDSZ > abuf + alen) - { - ares_free (hostname); - return ARES_EBADRESP; - } - aptr += len + QFIXEDSZ; - - /* Examine each answer resource record (RR) in turn. */ - for (i = 0; i < ancount; i++) - { - /* Decode the RR up to the data field. */ - status = ares_expand_name (aptr, abuf, alen, &rr_name, &len); - if (status != ARES_SUCCESS) - { - break; - } - aptr += len; - if (aptr + RRFIXEDSZ > abuf + alen) - { - status = ARES_EBADRESP; - break; - } - rr_type = DNS_RR_TYPE (aptr); - rr_class = DNS_RR_CLASS (aptr); - rr_len = DNS_RR_LEN (aptr); - aptr += RRFIXEDSZ; - if (aptr + rr_len > abuf + alen) - { - status = ARES_EBADRESP; - break; - } - - /* Check if we are really looking at a TXT record */ - if (rr_class == C_IN && rr_type == T_TXT) - { - /* - * There may be multiple substrings in a single TXT record. Each - * substring may be up to 255 characters in length, with a - * "length byte" indicating the size of the substring payload. - * RDATA contains both the length-bytes and payloads of all - * substrings contained therein. - */ - - strptr = aptr; - while (strptr < (aptr + rr_len)) - { - substr_len = (unsigned char)*strptr; - if (strptr + substr_len + 1 > aptr + rr_len) - { - status = ARES_EBADRESP; - break; - } - - /* Allocate storage for this TXT answer appending it to the list */ - txt_curr = ares_malloc_data(ex ? ARES_DATATYPE_TXT_EXT : - ARES_DATATYPE_TXT_REPLY); - if (!txt_curr) - { - status = ARES_ENOMEM; - break; - } - if (txt_last) - { - txt_last->next = txt_curr; - } - else - { - txt_head = txt_curr; - } - txt_last = txt_curr; - - if (ex) - txt_curr->record_start = (strptr == aptr); - txt_curr->length = substr_len; - txt_curr->txt = ares_malloc (substr_len + 1/* Including null byte */); - if (txt_curr->txt == NULL) - { - status = ARES_ENOMEM; - break; - } - - ++strptr; - memcpy ((char *) txt_curr->txt, strptr, substr_len); - - /* Make sure we NULL-terminate */ - txt_curr->txt[substr_len] = 0; - - strptr += substr_len; - } - } - - /* Propagate any failures */ - if (status != ARES_SUCCESS) - { - break; - } - - /* Don't lose memory in the next iteration */ - ares_free (rr_name); - rr_name = NULL; - - /* Move on to the next record */ - aptr += rr_len; - } - - if (hostname) - ares_free (hostname); - if (rr_name) - ares_free (rr_name); - - /* clean up on error */ - if (status != ARES_SUCCESS) - { - if (txt_head) - ares_free_data (txt_head); - return status; - } - - /* everything looks fine, return the data */ - *txt_out = txt_head; - - return ARES_SUCCESS; -} - -int -ares_parse_txt_reply (const unsigned char *abuf, int alen, - struct ares_txt_reply **txt_out) -{ - return ares__parse_txt_reply(abuf, alen, 0, (void **) txt_out); -} - - -int -ares_parse_txt_reply_ext (const unsigned char *abuf, int alen, - struct ares_txt_ext **txt_out) -{ - return ares__parse_txt_reply(abuf, alen, 1, (void **) txt_out); -} |