diff options
Diffstat (limited to 'deps/node/deps/cares/src/ares_parse_ptr_reply.c')
| -rw-r--r-- | deps/node/deps/cares/src/ares_parse_ptr_reply.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/deps/node/deps/cares/src/ares_parse_ptr_reply.c b/deps/node/deps/cares/src/ares_parse_ptr_reply.c deleted file mode 100644 index 29e22cb1..00000000 --- a/deps/node/deps/cares/src/ares_parse_ptr_reply.c +++ /dev/null @@ -1,221 +0,0 @@ - -/* 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 "ares_setup.h" - -#ifdef HAVE_NETINET_IN_H -# include <netinet/in.h> -#endif -#ifdef HAVE_NETDB_H -# include <netdb.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_nowarn.h" -#include "ares_private.h" - -int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr, - int addrlen, int family, struct hostent **host) -{ - unsigned int qdcount, ancount; - int status, i, rr_type, rr_class, rr_len; - long len; - const unsigned char *aptr; - char *ptrname, *hostname, *rr_name, *rr_data; - struct hostent *hostent; - int aliascnt = 0; - int alias_alloc = 8; - char ** aliases; - size_t rr_data_len; - - /* Set *host to NULL for all failure cases. */ - *host = 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; - - /* Expand the name from the question, and skip past the question. */ - aptr = abuf + HFIXEDSZ; - status = ares__expand_name_for_response(aptr, abuf, alen, &ptrname, &len); - if (status != ARES_SUCCESS) - return status; - if (aptr + len + QFIXEDSZ > abuf + alen) - { - ares_free(ptrname); - return ARES_EBADRESP; - } - aptr += len + QFIXEDSZ; - - /* Examine each answer resource record (RR) in turn. */ - hostname = NULL; - aliases = ares_malloc(alias_alloc * sizeof(char *)); - if (!aliases) - { - ares_free(ptrname); - return ARES_ENOMEM; - } - for (i = 0; i < (int)ancount; i++) - { - /* Decode the RR up to the data field. */ - status = ares__expand_name_for_response(aptr, abuf, alen, &rr_name, &len); - if (status != ARES_SUCCESS) - break; - aptr += len; - if (aptr + RRFIXEDSZ > abuf + alen) - { - ares_free(rr_name); - 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) - { - ares_free(rr_name); - status = ARES_EBADRESP; - break; - } - - if (rr_class == C_IN && rr_type == T_PTR - && strcasecmp(rr_name, ptrname) == 0) - { - /* Decode the RR data and set hostname to it. */ - status = ares__expand_name_for_response(aptr, abuf, alen, &rr_data, - &len); - if (status != ARES_SUCCESS) - { - ares_free(rr_name); - break; - } - if (hostname) - ares_free(hostname); - hostname = rr_data; - rr_data_len = strlen(rr_data)+1; - aliases[aliascnt] = ares_malloc(rr_data_len * sizeof(char)); - if (!aliases[aliascnt]) - { - ares_free(rr_name); - status = ARES_ENOMEM; - break; - } - strncpy(aliases[aliascnt], rr_data, rr_data_len); - aliascnt++; - if (aliascnt >= alias_alloc) { - char **ptr; - alias_alloc *= 2; - ptr = ares_realloc(aliases, alias_alloc * sizeof(char *)); - if(!ptr) { - ares_free(rr_name); - status = ARES_ENOMEM; - break; - } - aliases = ptr; - } - } - - if (rr_class == C_IN && rr_type == T_CNAME) - { - /* Decode the RR data and replace ptrname with it. */ - status = ares__expand_name_for_response(aptr, abuf, alen, &rr_data, - &len); - if (status != ARES_SUCCESS) - { - ares_free(rr_name); - break; - } - ares_free(ptrname); - ptrname = rr_data; - } - - ares_free(rr_name); - aptr += rr_len; - if (aptr > abuf + alen) - { /* LCOV_EXCL_START: already checked above */ - status = ARES_EBADRESP; - break; - } /* LCOV_EXCL_STOP */ - } - - if (status == ARES_SUCCESS && !hostname) - status = ARES_ENODATA; - if (status == ARES_SUCCESS) - { - /* We got our answer. Allocate memory to build the host entry. */ - hostent = ares_malloc(sizeof(struct hostent)); - if (hostent) - { - hostent->h_addr_list = ares_malloc(2 * sizeof(char *)); - if (hostent->h_addr_list) - { - hostent->h_addr_list[0] = ares_malloc(addrlen); - if (hostent->h_addr_list[0]) - { - hostent->h_aliases = ares_malloc((aliascnt+1) * sizeof (char *)); - if (hostent->h_aliases) - { - /* Fill in the hostent and return successfully. */ - hostent->h_name = hostname; - for (i=0 ; i<aliascnt ; i++) - hostent->h_aliases[i] = aliases[i]; - hostent->h_aliases[aliascnt] = NULL; - hostent->h_addrtype = aresx_sitoss(family); - hostent->h_length = aresx_sitoss(addrlen); - memcpy(hostent->h_addr_list[0], addr, addrlen); - hostent->h_addr_list[1] = NULL; - *host = hostent; - ares_free(aliases); - ares_free(ptrname); - return ARES_SUCCESS; - } - ares_free(hostent->h_addr_list[0]); - } - ares_free(hostent->h_addr_list); - } - ares_free(hostent); - } - status = ARES_ENOMEM; - } - for (i=0 ; i<aliascnt ; i++) - if (aliases[i]) - ares_free(aliases[i]); - ares_free(aliases); - if (hostname) - ares_free(hostname); - ares_free(ptrname); - return status; -} |