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 On Time RTOS-32 Documentation
 Welcome
RTTarget-32
RTKernel-32
RTFiles-32
 RTIP-32
RTIP-32 Programming Manual
 Introduction
TCP/IP Networking
IP Packet Types
Sockets, IP, and Port Addresses
Blocking and Non-Blocking Sockets
MTU, MSS, and DCU
Fragmentation
UDP
TCP
Opening a TCP Connection
Closing a TCP Connection
TCP States
TCP Data Transfer
TCP Windows
TCP No Copy
Round Trip Time (RTT)
TCP Retransmission
TCP Keep Alive Packets
TCP Zero Window Probes
TCP Delayed Ack
TCP Silly Window Syndrome
TCP Nagle Algorithm
TCP Slow Start
TCP Congestion Avoidance
ICMP Source Quench
IGMP
Routing Table
ARP
NAT
Programming with RTIP-32
 Demo Programs
PPP
DHCP Client
DHCP Server
FTP Client
FTP Server
TFTP Client
TFTP Server
Telnet Client
Telnet Server
Web Server
SNMP Agent
POP3 Client
SMTP Client
SNTP Client
SMB Server
SMB Client
SMB3 Server
SMB3 Client
WLAN Driver
RTIP-32 Reference Manual
RTPEG-32
RTUSB-32
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TCP Keep Alive Packets
Keep alive packets are sent to a remote host when a packet has not been received from it for a specified time, which is controlled by CFG_KA_INTERVAL and CFG_KA_RETRY. If, after retrying to contact the remote host for KS_INTERVAL_TMO time, the remote host still has not responded, the connection is set to the closed state. The Keep Alive Packet sent to the remote host consists of an invalid sequence number and no data. Keep alive packets are only sent if the feature is enabled via function setsockopt. The default is disabled.
 TCP
 TCP Retransmission
 TCP Zero Window Probes
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