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RL-ARM User's Guide (MDK v4)

RL-RTX RL-FlashFS RL-TCPnet TCP Socket Opening TCP Connection TCP Active Open TCP Passive Open Sending TCP Data Example for Sending Data Multiple TCP Connections UDP Socket Opening UDP Connection Sending UDP Data When DHCP Enabled When ARP Cache Empty Example for Sending Data IP Multicasting Multiple UDP Connections Configuring RL-TCPnet Static Configuration System Definitions Ethernet Network Interface PPP Network Interface SLIP Network Interface UDP Socket TCP Socket BSD Socket HTTP Server Telnet Server TFTP Server TFTP Client FTP Server FTP Client DNS Client SMTP Client SNMP Agent SNTP Client Error Function Runtime Configuration Library Files Using RL-TCPnet Stand Alone With RTX Kernel Event Driven Operation IP Address Assignment Ethernet Interface PPP Interface SLIP Interface Localhost Applications HTTP Server Script Language CGI Functions Ajax Support Using XML XML Example How it works SOAP Support SOAP Interface Large POST Messages Web Pages Default Page Error Pages Web on SD Card Web Update File System Interface Http Caching How it works Internal Web External Web Multi-user Authentication Using RAM File System FCARM File Converter PRINT Directive NOPRINT Directive PAGEWIDTH Directive PAGELENGTH Directive ROOT Directive Telnet Server Command Line Interface Multi-user Authentication Sending Reply Message Short Reply Long Reply Continuous Screen Update TFTP Server File System Interface TFTP Client File System Interface FTP Server File System Interface Multi-user Authentication Supported Commands FTP Client File System Interface SMTP Client SNMP Agent MIB Database MIB Interface MIB Entry MIB Table DNS Resolver Starting DNS Device Drivers Ethernet Driver Interrupt Mode Modem Driver Serial Driver Using Serial Link Cable Connection Modem Connection Windows Dial-up Add Direct Serial Link New Dial-up Connection Configure PPP Dial-up Configure SLIP Dial-up Debugging Enabling Debug Debug Level Redirecting Output Function Overview BSD Routines CGI Routines Ethernet Routines FTP Routines HTTP Routines IGMP Routines Miscellaneous Routines Modem Routines PPP Routines Serial Routines SLIP Routines SMTP Routines SNMP Routines System Functions TCP Routines Telnet Routines TFTP Routines UDP Routines RL-CAN RL-USB Example Programs Library Reference Appendix

Command Line Interface

The Embedded Telnet Server calls the tnet_process_cmd() function when a command is received from the user. A command is any sequence of characters that is terminated by the CRLF sequence (the Enter key is pressed). The Telnet Server assembles this command and passes it as an argument to the tnet_process_cmd() function.

The command line interface functions are located in the Telnet_uif.c module. You must copy this module to your project directory, add it to your project, and customize it. You can add new commands or remove existing commands from the module. The module is located in the \Keil\ARM\RL\TCPnet\User folder.

The following functions are implemented in this module:

  • tnet_cbfunc() - copies various system messages to the sending buffer for transmission to the Telnet Client. You can also modify this function to support different languages.
  • tnet_msg_poll() - polls the upper-layer application for Unsolicited messages.
  • tnet_process_cmd() - called by the Telnet Server to process the commands entered by a remote user.

The following functions are optional in this module:

  • tnet_accept_host() - used for the telnet server access filtering. It is called when a telnet client is trying to connect to a telnet server.

The following system functions are included in the RL-TCPnet library:

  • tnet_ccmp() - compares the content of the command buffer.
  • tnet_set_delay() - sets a delay before a repeated call to tnet_proc_cmd(). You can use this function to implement a continuously updating screen.
  • tnet_get_info() - called from Telnet_uif.c to obtain the IP address and MAC address of the remote machine.
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