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| author | robot-contrib <robot-contrib@yandex-team.com> | 2024-08-07 11:23:56 +0300 |
|---|---|---|
| committer | robot-contrib <robot-contrib@yandex-team.com> | 2024-08-07 13:04:06 +0300 |
| commit | 2137507f9ec8a5b7c48cc521943ffa038262a679 (patch) | |
| tree | 1032db05350b9a3810833ce29ab3d238d34e256c /contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c | |
| parent | a159873112d46d9c8a1822e0e61857bb939803c2 (diff) | |
| download | ydb-2137507f9ec8a5b7c48cc521943ffa038262a679.tar.gz | |
Update contrib/libs/c-ares to 1.33.0
023d295bf695dc8b9df70e1ee966dc423cdf62ca
Diffstat (limited to 'contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c')
| -rw-r--r-- | contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c b/contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c new file mode 100644 index 0000000000..fc9ab9219d --- /dev/null +++ b/contrib/libs/c-ares/src/lib/legacy/ares_parse_ns_reply.c @@ -0,0 +1,154 @@ +/* MIT License + * + * Copyright (c) 2023 Brad House + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * SPDX-License-Identifier: MIT + */ + +#include "ares_private.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 + +int ares_parse_ns_reply(const unsigned char *abuf, int alen_int, + struct hostent **host) +{ + ares_status_t status; + size_t alen; + size_t nscount = 0; + struct hostent *hostent = NULL; + const char *hostname = NULL; + ares_dns_record_t *dnsrec = NULL; + size_t i; + size_t ancount; + + *host = NULL; + + if (alen_int < 0) { + return ARES_EBADRESP; + } + + alen = (size_t)alen_int; + + status = ares_dns_parse(abuf, alen, 0, &dnsrec); + if (status != ARES_SUCCESS) { + goto done; + } + + ancount = ares_dns_record_rr_cnt(dnsrec, ARES_SECTION_ANSWER); + if (ancount == 0) { + status = ARES_ENODATA; + goto done; + } + + /* Response structure */ + hostent = ares_malloc(sizeof(*hostent)); + if (hostent == NULL) { + status = ARES_ENOMEM; /* LCOV_EXCL_LINE: OutOfMemory */ + goto done; /* LCOV_EXCL_LINE: OutOfMemory */ + } + + memset(hostent, 0, sizeof(*hostent)); + + hostent->h_addr_list = ares_malloc(sizeof(*hostent->h_addr_list)); + if (hostent->h_addr_list == NULL) { + status = ARES_ENOMEM; /* LCOV_EXCL_LINE: OutOfMemory */ + goto done; /* LCOV_EXCL_LINE: OutOfMemory */ + } + hostent->h_addr_list[0] = NULL; + hostent->h_addrtype = AF_INET; + hostent->h_length = sizeof(struct in_addr); + + /* Fill in hostname */ + status = ares_dns_record_query_get(dnsrec, 0, &hostname, NULL, NULL); + if (status != ARES_SUCCESS) { + goto done; /* LCOV_EXCL_LINE: DefensiveCoding */ + } + hostent->h_name = ares_strdup(hostname); + if (hostent->h_name == NULL) { + status = ARES_ENOMEM; /* LCOV_EXCL_LINE: OutOfMemory */ + goto done; /* LCOV_EXCL_LINE: OutOfMemory */ + } + + /* Preallocate the maximum number + 1 */ + hostent->h_aliases = ares_malloc((ancount + 1) * sizeof(*hostent->h_aliases)); + if (hostent->h_aliases == NULL) { + status = ARES_ENOMEM; /* LCOV_EXCL_LINE: OutOfMemory */ + goto done; /* LCOV_EXCL_LINE: OutOfMemory */ + } + memset(hostent->h_aliases, 0, (ancount + 1) * sizeof(*hostent->h_aliases)); + + for (i = 0; i < ancount; i++) { + const ares_dns_rr_t *rr = + ares_dns_record_rr_get(dnsrec, ARES_SECTION_ANSWER, i); + + if (rr == NULL) { + /* Shouldn't be possible */ + status = ARES_EBADRESP; /* LCOV_EXCL_LINE: DefensiveCoding */ + goto done; /* LCOV_EXCL_LINE: DefensiveCoding */ + } + + if (ares_dns_rr_get_class(rr) != ARES_CLASS_IN || + ares_dns_rr_get_type(rr) != ARES_REC_TYPE_NS) { + continue; + } + + hostname = ares_dns_rr_get_str(rr, ARES_RR_NS_NSDNAME); + if (hostname == NULL) { + status = ARES_EBADRESP; /* LCOV_EXCL_LINE: DefensiveCoding */ + goto done; /* LCOV_EXCL_LINE: DefensiveCoding */ + } + + hostent->h_aliases[nscount] = ares_strdup(hostname); + if (hostent->h_aliases[nscount] == NULL) { + status = ARES_ENOMEM; + goto done; + } + nscount++; + } + + if (nscount == 0) { + status = ARES_ENODATA; + } else { + status = ARES_SUCCESS; + } + +done: + if (status != ARES_SUCCESS) { + ares_free_hostent(hostent); + /* Compatibility */ + if (status == ARES_EBADNAME) { + status = ARES_EBADRESP; + } + } else { + *host = hostent; + } + ares_dns_record_destroy(dnsrec); + return (int)status; +} |