lwres_gai_strerror.docbook

非常好的dns解析软件

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<refentry>

  <refentryinfo>
    <date>Jun 30, 2000</date>
  </refentryinfo>

  <refmeta>
    <refentrytitle>lwres_gai_strerror</refentrytitle>
    <manvolnum>3</manvolnum>
    <refmiscinfo>BIND9</refmiscinfo>
  </refmeta>

  <docinfo>
    <copyright>
      <year>2004</year>
      <year>2005</year>
      <year>2007</year>
      <holder>Internet Systems Consortium, Inc. ("ISC")</holder>
    </copyright>
    <copyright>
      <year>2000</year>
      <year>2001</year>
      <holder>Internet Software Consortium.</holder>
    </copyright>
  </docinfo>

  <refnamediv>
    <refname>lwres_gai_strerror</refname>
    <refpurpose>print suitable error string</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <funcsynopsis>
<funcsynopsisinfo>#include &lt;lwres/netdb.h&gt;</funcsynopsisinfo>
<funcprototype>
        <funcdef>
char *
<function>gai_strerror</function></funcdef>
        <paramdef>int <parameter>ecode</parameter></paramdef>
      </funcprototype>
</funcsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>DESCRIPTION</title>

    <para><function>lwres_gai_strerror()</function>
      returns an error message corresponding to an error code returned by
      <function>getaddrinfo()</function>.
      The following error codes and their meaning are defined in
      <filename>include/lwres/netdb.h</filename>.
      <variablelist>
        <varlistentry>
          <term><errorcode>EAI_ADDRFAMILY</errorcode></term>
          <listitem>
            <para>
              address family for hostname not supported
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_AGAIN</errorcode></term>
          <listitem>
            <para>
              temporary failure in name resolution
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_BADFLAGS</errorcode></term>
          <listitem>
            <para>
              invalid value for
              <constant>ai_flags</constant>
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_FAIL</errorcode></term>
          <listitem>
            <para>
              non-recoverable failure in name resolution
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_FAMILY</errorcode></term>
          <listitem>
            <para><constant>ai_family</constant> not supported
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_MEMORY</errorcode></term>
          <listitem>
            <para>
              memory allocation failure
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_NODATA</errorcode></term>
          <listitem>
            <para>
              no address associated with hostname
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_NONAME</errorcode></term>
          <listitem>
            <para>
              hostname or servname not provided, or not known
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_SERVICE</errorcode></term>
          <listitem>
            <para>
              servname not supported for <constant>ai_socktype</constant>
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_SOCKTYPE</errorcode></term>
          <listitem>
            <para><constant>ai_socktype</constant> not supported
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><errorcode>EAI_SYSTEM</errorcode></term>
          <listitem>
            <para>
              system error returned in errno
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
      The message <errorname>invalid error code</errorname> is returned if
      <parameter>ecode</parameter>
      is out of range.
    </para>
    <para><constant>ai_flags</constant>,
      <constant>ai_family</constant>
      and
      <constant>ai_socktype</constant>
      are elements of the
      <type>struct  addrinfo</type>
      used by
      <function>lwres_getaddrinfo()</function>.
    </para>
  </refsect1>

  <refsect1>
    <title>SEE ALSO</title>
    <para><citerefentry>
        <refentrytitle>strerror</refentrytitle><manvolnum>3</manvolnum>
      </citerefentry>,

      <citerefentry>
        <refentrytitle>lwres_getaddrinfo</refentrytitle><manvolnum>3</manvolnum>
      </citerefentry>,

      <citerefentry>
        <refentrytitle>getaddrinfo</refentrytitle><manvolnum>3</manvolnum>
      </citerefentry>,

      <citerefentry>
        <refentrytitle>RFC2133</refentrytitle>
      </citerefentry>.
    </para>
  </refsect1>
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