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0x14
SOCK_LISTEN
SOCK_ESTABLISHED This indicates the status of the connection of Socket n.
0x17
0x1C
SOCK_CLOSE_WAIT
0x22
SOCK_UDP
0x42
SOCK_MACRAW
The following table shows a temporary status indicated during changing the status of Socket
n.
Value
Symbol
0x15
SOCK_SYNSENT
W7500x Reference Manual Version1.1.0
This indicates Socket n is operating as 'TCP server' mode and
waiting for connection-request (SYN packet) from a peer ('TCP
client').
It will change to SOCK_ESTALBLISHED when the connection-
request is successfully accepted.
Otherwise it will change to SOCK_CLOSED after TCPTO
occurred (Sn_IR(TIMEOUT) = '1').
It changes to SOCK_ESTABLISHED when the 'TCP SERVER'
processed the SYN packet from the 'TCP CLIENT' during
SOCK_LISTEN, or when the CONNECT command is successful.
During SOCK_ESTABLISHED, DATA packet can be transferred
using SEND or RECV command.
This indicates Socket n received the disconnect-request (FIN
packet) from the connected peer. This is half-closing status,
and data can be transferred. For full-closing, DISCON command
is used. But For just-closing, CLOSE command is used.
This indicates Socket n is opened in UDP mode(Sn_MR(P[3:0])
= '0010').
It changes to SOCK_UDP when Sn_MR(P[3:0]) = '0010') and
OPEN command is ordered.
Unlike TCP mode, data can be transfered without the
connection-process.
This indicates Socket 0 is opened in MACRAW mode
(S0_MR(P[3:0]) = '0100')and is valid only in Socket 0.
It changes to SOCK_MACRAW when S0_MR(P[3:0] = '0100' and
OPEN command is ordered.
Like UDP mode socket, MACRAW mode Socket 0 can transfer a
MAC packet (Ethernet frame) without the connection-process.
This indicates Socket n sent the connect-request packet
(SYN packet) to a peer.
Description
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