NetBIOS Level 1

struct netbios_info_1 {
 unsigned char         nb1_net_name[NETBIOS_NAME_LEN+1];
 unsigned char         nb1_driver_name[DEVLEN+1];
 unsigned char         nb1_lana_num;
 unsigned char         nb1_pad_1;
 unsigned short        nb1_driver_type;
 unsigned short        nb1_net_status;
 unsigned long         nb1_net_bandwidth;
 unsigned short        nb1_max_sess;
 unsigned short        nb1_max_ncbs;
 unsigned short        nb1_max_names;
};

where:

• The first field in this data structure is identical to that in the previous level.

• nb1_driver_name is an ASCIIZ string specifying the network device driver name the LAN Server software uses. This field is equivalent to the value of the nb1_net_name parameter in the Networks section of the IBMLAN.INI file.

• nb1_lana_num is the network adapter number used by the nb1_driver_name.

• nb1_pad_1 word-aligns the data structure components.

• nb1_driver_type is one of two values indicating the device driver protocol type, as defined in the NETBIOS.H header file: ┌──────────────────────┬───────┬───────────────────────────────────────────────┐
  │ SYMBOLIC CONSTANT │ VALUE │ TYPE OF PROTOCOL │
  ├──────────────────────┼───────┼───────────────────────────────────────────────┤
  │ NB_TYPE_NCB │ 1 │ Network control block (NCB) protocol │
  ├──────────────────────┼───────┼───────────────────────────────────────────────┤
  │ NB_TYPE_MCB │ 2 │ Message control block (MCB) protocol │
  └──────────────────────┴───────┴───────────────────────────────────────────────┘
  

• nb1_net_status indicates the status of the device driver. The bits for this field are defined as follows: ┌────────────┬─────────────────────────────────────────────────────────────────┐
  │ BITS │ MEANING │
  ├────────────┼─────────────────────────────────────────────────────────────────┤
  │ 0 │ If 1, the network software is started. │
  ├────────────┼─────────────────────────────────────────────────────────────────┤
  │ 1 │ If 1, a loopback driver is started. │
  ├────────────┼─────────────────────────────────────────────────────────────────┤
  │ 2-13 │ Reserved. │
  ├────────────┼─────────────────────────────────────────────────────────────────┤
  │ 14-15 │ If 0, the network software is not started. │
  │ │ If 1, the software is operating in regular mode. │
  │ │ If 2, the software is operating in privileged mode. │
  │ │ If 3, the software is operating in exclusive mode. │
  └────────────┴─────────────────────────────────────────────────────────────────┘
  

• nb1_net_bandwidth indicates the number of bits per second that the network hardware accommodates.

• nb1_max_sess indicates the number of concurrent sessions each device driver can establish.

• nb1_max_ncbs indicates the number of NCBs that can be outstanding at any time.

• nb1_max_names indicates the number of network names a network card can establish, depending on the type of network card used.