下面代码很不完善，比如缺少头文件引用等，“日后”再进行优化修改。

    2. // 解析域名获取ip地址
    3. void CMX_UpdateUtils::parseUpdateSvrDomain( const char* domainStr )
    4. {
    5.     if( !domainStr || domainStr == "" )
    6.     {
    7.         LogDebug( "invalid domain name." );
    8.         return;
    9.     }
    10.     m_vIPsDomain.clear();
    11.     #ifdef CMX_WIN_COMPILE
    12.     struct hostent* h = gethostbyname( domainStr );
    13.     if( h != NULL )
    14.     {
    15.         unsigned char* p = nullptr;
    16.         for( int i = 0; h->h_addr_list[i]; i++ )
    17.         {
    18.             p = (unsigned char*)h->h_addr_list[i];
    19.             char ip[16] = { 0 };
    20.             sprintf( ip, "%u.%u.%u.%u", p[0], p[1], p[2], p[3] );
    21.             m_vIPsDomain.push_back( ip );
    22.         }
    23.     }
    24.     #else
    25.     struct addrinfo * result;
    26.     struct addrinfo * tmpIterator;
    27.     struct sockaddr_in *tmpIPV4;
    28.     struct sockaddr_in6 *tmpIPV6;
    29.     int error;
    30.     struct addrinfo hints;
    31.     memset( &hints, 0, sizeof(hints) );
    32.     //hints.ai_family = AF_UNSPEC;
    33.     hints.ai_socktype = SOCK_STREAM;
    34.     //hints.ai_flags = AI_PASSIVE;/* For wildcard IP address */
    35.     //hints.ai_protocol = IPPROTO_IP;/* Any protocol */
    36.     error = getaddrinfo( domainStr, NULL, &hints, &result );
    37.     if( error == 0 )
    38.     {
    39.         for( tmpIterator = result; tmpIterator != NULL; tmpIterator = tmpIterator->ai_next ) {
    40.             switch( tmpIterator->ai_addr->sa_family ) {
    41.                 case AF_INET:
    42.                     {
    43.                         char ipv4Buf[32];
    44.                         tmpIPV4 = (struct sockaddr_in*)tmpIterator->ai_addr;
    45.                         inet_ntop(AF_INET, &tmpIPV4->sin_addr, ipv4Buf, 32);
    46.                         LogDebug( StringUtils::format( "get ip4[%s] from domain[%s]", ipv4Buf, domainStr ) );
    47.                         m_vIPsDomain.push_back( ipv4Buf );
    48.                     }
    49.                     break;
    50.                 case AF_INET6:
    51.                     {
    52.                         char ipv6Buf[64];
    53.                         tmpIPV6 = (struct sockaddr_in6*)tmpIterator->ai_addr;
    54.                         inet_ntop( AF_INET6, &tmpIPV6->sin6_addr, ipv6Buf, 64 );
    55.                         LogDebug( StringUtils::format( "get ip6[%s] from domain[%s]", ipv6Buf, domainStr ) );
    56.                         m_vIPsDomain.push_back( ipv6Buf );
    57.                     }
    58.                     break;
    59.                 default:
    60.                     break;
    61.             }
    62.         }
    63.         freeaddrinfo( result );
    64.     }
    65.     #endif
    66.     //输出日志
    67.     if( m_vIPsDomain.size() > 0 )
    68.     {
    69.         std::vector<std::string> justOne;
    70.         justOne.push_back( m_vIPsDomain[0] );
    71.         m_vIPsDomain = justOne;
    72.         LogDebug( StringUtils::format( "the ouput of parsing domain(%s) is:", domainStr ) );
    73.         for( int i = 0; i < (int)m_vIPsDomain.size(); i++ )
    74.         {
    75.             LogDebug( m_vIPsDomain[i] );
    76.         }
    77.     }
    78.     else
    79.     {
    80.         LogDebug( StringUtils::format( "the ouput of parsing domain(%s) is empty", domainStr ) );
    81.     }
    82. }