W&T 57630, Manual

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W&T
network inventory via UDP
Subject to errors and modifications:
7.4 Network inventory via UDP
Larger installations especially often require inventorizing of the
Web-IOs or also W&T Com-Servers currently located in the
network. UDP Port 8513 is provided for this purpose. After
receiving a network packete on this port, the Web-IO replies to
the sender with an info packet. This contains information about
the Web-IO and its network parameters.
Whether a packet was received via broadcast or directly
addressed makes no difference in generating the info structure.
The only requirement is that Port 8513 be used.
1
For reasons of backward compatibility the Web-IOs
continue to support UDP info port 8512. For new
applications, however, only Port 8513 should be used.
7.4.1 The info packet
Each info packet consists of 3-6 data structures: BOX_VERSION
contains information about the respective model of the Web-IO or
Com-Server and its firmware version. Network-relevant data such
as MAC and IP address can be taken from the
BOX_DESCRIPT
structure. The 3.-6. structure PORT_DESCRIPT provides
information about the sete operatoin mode (for W&T Com-Servers
only) and the current connection status of the individual ports. The
total length of an info packet is calculated as follows:
10 + 22 +
(port_anz × 10) bytes
#pragma pack(1)
typedef struct _BOX_VERSION // ( 10 byte )
{ unsigned int version; // 0x10: 1.0 (Version of this structure)
unsigned int sw_rev; // z.B. 1.24 (0x1501)
unsigned int hw_rev; // C2_EURO = 2.0 (0x0002)
// C3_PC104 = 3.0 (0x0003)
// C4_MINI = 4.0 (0x0004)
// C5_100BT = 5.0 (0x0005)
// C6_INDUSTRY = 6.0 (0x0006)
// C8_LOW_VOLTAGE = 8.0 (0x0008)
// C8_WEB-IO = 8.1 (0x0108)
unsigned int reserved[2];
}BOX_VERSION;