1 files changed, 65 insertions, 0 deletions
diff --git a/lib/hostip.c b/lib/hostip.c
index 6c6ee8cbc..f722747ab 100644
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -558,3 +558,68 @@ Curl_addrinfo *Curl_addrinfo_copy(const void *org, int port)
   return Curl_he2ai(orig, port);
 }
 #endif /* CURLRES_ADDRINFO_COPY */
+
+/***********************************************************************
+ * Only for plain-ipv4 and c-ares builds
+ **********************************************************************/
+
+#if defined(CURLRES_IPV4) || defined(CURLRES_ARES)
+/*
+ * This is a function for freeing name information in a protocol independent
+ * way.
+ */
+void Curl_freeaddrinfo(Curl_addrinfo *ai)
+{
+  Curl_addrinfo *next;
+
+  /* walk over the list and free all entries */
+  while(ai) {
+    next = ai->ai_next;
+    free(ai);
+    ai = next;
+  }
+}
+
+struct namebuf {
+  struct hostent hostentry;
+  char *h_addr_list[2];
+  struct in_addr addrentry;
+  char h_name[16]; /* 123.123.123.123 = 15 letters is maximum */
+};
+
+/*
+ * Curl_ip2addr() takes a 32bit ipv4 internet address as input parameter
+ * together with a pointer to the string version of the address, and it
+ * returns a Curl_addrinfo chain filled in correctly with information for this
+ * address/host.
+ *
+ * The input parameters ARE NOT checked for validity but they are expected
+ * to have been checked already when this is called.
+ */
+Curl_addrinfo *Curl_ip2addr(in_addr_t num, const char *hostname, int port)
+{
+  Curl_addrinfo *ai;
+  struct hostent *h;
+  struct in_addr *addrentry;
+  struct namebuf buffer;
+  struct namebuf *buf = &buffer;
+
+  h = &buf->hostentry;
+  h->h_addr_list = &buf->h_addr_list[0];
+  addrentry = &buf->addrentry;
+  addrentry->s_addr = num;
+  h->h_addr_list[0] = (char*)addrentry;
+  h->h_addr_list[1] = NULL;
+  h->h_addrtype = AF_INET;
+  h->h_length = sizeof(*addrentry);
+  h->h_name = &buf->h_name[0];
+  h->h_aliases = NULL;
+
+  /* Now store the dotted version of the address */
+  snprintf((char *)h->h_name, 16, "%s", hostname);
+
+  ai = Curl_he2ai(h, port);
+
+  return ai;
+}
+#endif
+\ No newline at end of file