Merge branch 'rightlib' into mergelibs-241019-1758

1 files changed, 274 insertions, 0 deletions

diff --git a/contrib/libs/c-ares/src/lib/ares_addrinfo2hostent.c b/contrib/libs/c-ares/src/lib/ares_addrinfo2hostent.c
new file mode 100644
index 0000000000..2bbc791157
--- /dev/null
+++ b/contrib/libs/c-ares/src/lib/ares_addrinfo2hostent.c
@@ -0,0 +1,274 @@
+/* MIT License
+ *
+ * Copyright (c) 1998 Massachusetts Institute of Technology
+ * Copyright (c) 2005 Dominick Meglio
+ * Copyright (c) 2019 Andrew Selivanov
+ * Copyright (c) 2021 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
+
+#ifdef HAVE_STRINGS_H
+#  include <strings.h>
+#endif
+
+#ifdef HAVE_LIMITS_H
+#  include <limits.h>
+#endif
+
+
+ares_status_t ares_addrinfo2hostent(const struct ares_addrinfo *ai, int family,
+                                    struct hostent **host)
+{
+  struct ares_addrinfo_node  *next;
+  struct ares_addrinfo_cname *next_cname;
+  char                      **aliases  = NULL;
+  char                       *addrs    = NULL;
+  size_t                      naliases = 0;
+  size_t                      naddrs   = 0;
+  size_t                      alias    = 0;
+  size_t                      i;
+
+  if (ai == NULL || host == NULL) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  /* Use the first node of the response as the family, since hostent can only
+   * represent one family.  We assume getaddrinfo() returned a sorted list if
+   * the user requested AF_UNSPEC. */
+  if (family == AF_UNSPEC && ai->nodes) {
+    family = ai->nodes->ai_family;
+  }
+
+  if (family != AF_INET && family != AF_INET6) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  *host = ares_malloc(sizeof(**host));
+  if (!(*host)) {
+    goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+  }
+  memset(*host, 0, sizeof(**host));
+
+  next = ai->nodes;
+  while (next) {
+    if (next->ai_family == family) {
+      ++naddrs;
+    }
+    next = next->ai_next;
+  }
+
+  next_cname = ai->cnames;
+  while (next_cname) {
+    if (next_cname->alias) {
+      ++naliases;
+    }
+    next_cname = next_cname->next;
+  }
+
+  aliases = ares_malloc((naliases + 1) * sizeof(char *));
+  if (!aliases) {
+    goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+  }
+  (*host)->h_aliases = aliases;
+  memset(aliases, 0, (naliases + 1) * sizeof(char *));
+
+  if (naliases) {
+    for (next_cname = ai->cnames; next_cname != NULL;
+         next_cname = next_cname->next) {
+      if (next_cname->alias == NULL) {
+        continue;
+      }
+      aliases[alias] = ares_strdup(next_cname->alias);
+      if (!aliases[alias]) {
+        goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+      }
+      alias++;
+    }
+  }
+
+
+  (*host)->h_addr_list = ares_malloc((naddrs + 1) * sizeof(char *));
+  if (!(*host)->h_addr_list) {
+    goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+  }
+
+  memset((*host)->h_addr_list, 0, (naddrs + 1) * sizeof(char *));
+
+  if (ai->cnames) {
+    (*host)->h_name = ares_strdup(ai->cnames->name);
+    if ((*host)->h_name == NULL && ai->cnames->name) {
+      goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+    }
+  } else {
+    (*host)->h_name = ares_strdup(ai->name);
+    if ((*host)->h_name == NULL && ai->name) {
+      goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+    }
+  }
+
+  (*host)->h_addrtype = (HOSTENT_ADDRTYPE_TYPE)family;
+
+  if (family == AF_INET) {
+    (*host)->h_length = sizeof(struct in_addr);
+  }
+
+  if (family == AF_INET6) {
+    (*host)->h_length = sizeof(struct ares_in6_addr);
+  }
+
+  if (naddrs) {
+    addrs = ares_malloc(naddrs * (size_t)(*host)->h_length);
+    if (!addrs) {
+      goto enomem; /* LCOV_EXCL_LINE: OutOfMemory */
+    }
+
+    i = 0;
+    for (next = ai->nodes; next != NULL; next = next->ai_next) {
+      if (next->ai_family != family) {
+        continue;
+      }
+      (*host)->h_addr_list[i] = addrs + (i * (size_t)(*host)->h_length);
+      if (family == AF_INET6) {
+        memcpy((*host)->h_addr_list[i],
+               &(CARES_INADDR_CAST(const struct sockaddr_in6 *, next->ai_addr)
+                   ->sin6_addr),
+               (size_t)(*host)->h_length);
+      }
+      if (family == AF_INET) {
+        memcpy((*host)->h_addr_list[i],
+               &(CARES_INADDR_CAST(const struct sockaddr_in *, next->ai_addr)
+                   ->sin_addr),
+               (size_t)(*host)->h_length);
+      }
+      ++i;
+    }
+
+    if (i == 0) {
+      ares_free(addrs);
+    }
+  }
+
+  if (naddrs == 0 && naliases == 0) {
+    ares_free_hostent(*host);
+    *host = NULL;
+    return ARES_ENODATA;
+  }
+
+  return ARES_SUCCESS;
+
+/* LCOV_EXCL_START: OutOfMemory */
+enomem:
+  ares_free_hostent(*host);
+  *host = NULL;
+  return ARES_ENOMEM;
+  /* LCOV_EXCL_STOP */
+}
+
+ares_status_t ares_addrinfo2addrttl(const struct ares_addrinfo *ai, int family,
+                                    size_t                req_naddrttls,
+                                    struct ares_addrttl  *addrttls,
+                                    struct ares_addr6ttl *addr6ttls,
+                                    size_t               *naddrttls)
+{
+  struct ares_addrinfo_node  *next;
+  struct ares_addrinfo_cname *next_cname;
+  int                         cname_ttl = INT_MAX;
+
+  if (family != AF_INET && family != AF_INET6) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  if (ai == NULL || naddrttls == NULL) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  if (family == AF_INET && addrttls == NULL) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  if (family == AF_INET6 && addr6ttls == NULL) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  if (req_naddrttls == 0) {
+    return ARES_EBADQUERY; /* LCOV_EXCL_LINE: DefensiveCoding */
+  }
+
+  *naddrttls = 0;
+
+  next_cname = ai->cnames;
+  while (next_cname) {
+    if (next_cname->ttl < cname_ttl) {
+      cname_ttl = next_cname->ttl;
+    }
+    next_cname = next_cname->next;
+  }
+
+  for (next = ai->nodes; next != NULL; next = next->ai_next) {
+    if (next->ai_family != family) {
+      continue;
+    }
+
+    if (*naddrttls >= req_naddrttls) {
+      break;
+    }
+
+    if (family == AF_INET6) {
+      if (next->ai_ttl > cname_ttl) {
+        addr6ttls[*naddrttls].ttl = cname_ttl;
+      } else {
+        addr6ttls[*naddrttls].ttl = next->ai_ttl;
+      }
+
+      memcpy(&addr6ttls[*naddrttls].ip6addr,
+             &(CARES_INADDR_CAST(const struct sockaddr_in6 *, next->ai_addr)
+                 ->sin6_addr),
+             sizeof(struct ares_in6_addr));
+    } else {
+      if (next->ai_ttl > cname_ttl) {
+        addrttls[*naddrttls].ttl = cname_ttl;
+      } else {
+        addrttls[*naddrttls].ttl = next->ai_ttl;
+      }
+      memcpy(&addrttls[*naddrttls].ipaddr,
+             &(CARES_INADDR_CAST(const struct sockaddr_in *, next->ai_addr)
+                 ->sin_addr),
+             sizeof(struct in_addr));
+    }
+    (*naddrttls)++;
+  }
+
+  return ARES_SUCCESS;
+}