SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
18 Internet protocol transport layer
Page 201 of 307
18.23.3 Defined values
Parameter
Type
Description
<socket>
Number
Socket identifier. The range goes from 0 to 6
<param_id>
Number
Control request identifier. Possible values are:
•
0: query for socket type
•
1: query for last socket error
•
2: get the total amount of bytes sent from the socket
•
3: get the total amount of bytes received by the socket
•
4: query for remote peer IP address and port
•
10: query for TCP socket status (only TCP sockets)
•
11: query for TCP outgoing unacknowledged data (only TCP sockets)
•
5-9, 12-99: RFU
<param_val>
Number /
String
This value may assume different means depending on the <param_id> parameter.
If <param_id>= 0, <param_val> can assume these values:
•
6 TCP socket
•
17: UDP socket
If <param_id>= 1, <param_val> can assume these values:
•
N: last socket error
If <param_id>= 2, <param_val> can assume these values:
•
N: the total amount (in bytes) of sent (acknow unacknowledged) data
If <param_id>= 3, <param_val> can assume these values:
•
N: the total amount (in bytes) of received (read) data
If <param_id>= 4, <param_val> can assume these values:
•
A string representing the remote peer IP address expressed in dotted decimal form
If <param_id>= 10, <param_val> can assume these values:
•
0: the socket is in INACTIVE status (it corresponds to CLOSED status defined in
RFC793 "TCP Protocol Specification" [
])
•
1: the socket is in LISTEN status
•
2: the socket is in SYN_SENT status
•
3: the socket is in SYN_RCVD status
•
4: the socket is in ESTABILISHED status
•
5: the socket is in FIN_WAIT_1 status
•
6: the socket is in FIN_WAIT_2 status
•
7: the sokcet is in CLOSE_WAIT status
•
8: the socket is in CLOSING status
•
9: the socket is in LAST_ACK status
•
10: the socket is in TIME_WAIT status
If <param_id>= 11, <param_val> can assume these values:
•
N: the total amount of outgoing unacknowledged data
<param_val2>
Number
This value is present only when <param_id> is 4. It represents the remote peer IP port.
For IP address format reference see the
18.23.4 Notes
SARA-R4 / SARA-N4
• <param_id>= 2, 3, 4 and 11 are not supported.
