Installation guide

74 DC 900-1325I

Freeway Server-Resident Application (SRA) Programmer Guide

Figure 5–1 shows an example of an SRA initialization text file. In this example file, each

text field is separated with a ‘|’ separator character making it easy to use UNIX string

extraction and conversion routines such as strtok_r and strtol.

5.2 Socket Interfaces

One of the most common methods of interfacing with SRAs on the Freeway server is to

use TCP/IP sockets. You can program the SRA to open a listening TCP socket using

standard UNIX socket routines. Client programs can then open a socket connection

directly to your SRA and send and receive data and/or commands.

Figure 5–1: Example SRA Initialization File

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################################################################

# SRA SERIAL PORT LIST (/tmp/boot/sra_init.dat)

# Field positions and lengths are fixed.

# The key field can hold 1-64.

# The name field is space-padded to 7 characters.

# The description field is space-padded to 31 characters.

# The type field is one of the following protocols:

# 0=UNUSED LINE, 1=AWS, 2=CUSTOM (SPS).

################################################################

# card (0-7)

# | port (0-7)

# key (1-64) | | type (0-2)

# | | | | enable on startup?

#-- ------- ------------------------------- - - - -