10 More Discussions You Might Find Interesting
1. Solaris
please find the below o/p for your reference
bash-3.00# fcinfo hba-port
HBA Port WWN: 21000024ff295a34
OS Device Name: /dev/cfg/c2
Manufacturer: QLogic Corp.
Model: 375-3356-02
Firmware Version: 05.03.02
FCode/BIOS Version: BIOS: 2.02; fcode: 2.01;... (3 Replies)
Discussion started by: sb200
3 Replies
2. Solaris
I'd like to use SPARC Solaris10 to 'wake up' an old PC on same LAN.
what is the simplest way of doing it? (preferably without installing new software)
thanks. (14 Replies)
Discussion started by: orange47
14 Replies
3. IP Networking
i want to kill a tcp connection by killing its pid
with netstat -an i got the tcp ip connection on port 5914
but when i type ps -a or ps-e there is not such process running on port 5914
is it possible that because i do not log on with proper user account i can not see that process running? (30 Replies)
Discussion started by: alinamadchian
30 Replies
4. IP Networking
Hi!
I'm writing an application (using BSD sockets on a Linux host) which communicates over TCP/IP with an embedded device. This embedded device has an old and real slow integrated circuit (Epson S1S6000) which handles all of the TCP/IP communication for it.
Problem is, this circuit (S1S6000)... (7 Replies)
Discussion started by: olle
7 Replies
5. Shell Programming and Scripting
I have multiple processes running the same program on my linux machine. For each process I want to be able to use a unique (available) TCP port. I have thought of using netstat to check which ports are available for use however, the time-window between checking and selecting might expose some race... (1 Reply)
Discussion started by: timmylita
1 Replies
6. IP Networking
Hello,
I'm having an issue with TCP sockets.
When the TCP connection is terminated on one end, TCP packet with RST flag set is being sent to the sender. All the packets sent so far were carrying the DSCP 'AF21' set by me. But packet with RST flag is carrying DSCP '0'.
Is this expected or... (0 Replies)
Discussion started by: Solace
0 Replies
7. UNIX for Dummies Questions & Answers
Hello, I have a service running (ODBC) and every now and then it will hang and I will have to stop and restart the service. The problem is when I stop the service, it indeed stops the service, but netstat reports a tcp port still open with the fin_wait_2 status. Then I must close the client... (1 Reply)
Discussion started by: raidzero
1 Replies
8. Shell Programming and Scripting
can u tell me from where do i get
TCP/IP Source code plz. (2 Replies)
Discussion started by: pradeep83rawat
2 Replies
9. UNIX for Dummies Questions & Answers
hi,
i am using Sun Solaris 8 (Sparc). Currently there is a SNMP agent running on port 161.
How should I change it to port 8001?
which file to modify and restart is necessary?
pls teach me the information.
thanks (8 Replies)
Discussion started by: champion
8 Replies
10. IP Networking
I am trying to connect via DBACCESS and Informix server to a server on a different computer. When I execute the connect command from dbaccess I get the following message,
Exec format error cannot bind a name to the port.
As far as I know the port is not being used by another client.
How... (1 Reply)
Discussion started by: lopez
1 Replies
tcp(4p) tcp(4p)
Name
tcp - Internet Transmission Control Protocol
Syntax
#include <sys/socket.h>
#include <netinet/in.h>
s = socket(AF_INET, SOCK_STREAM, 0);
Description
The TCP protocol provides reliable, flow-controlled, two-way transmission of data. It is a byte-stream protocol used to support the
SOCK_STREAM abstraction. TCP uses the standard Internet address format and, in addition, provides a per-host collection of ``port
addresses''. Thus, each address is composed of an Internet address specifying the host and network, with a specific TCP port on the host
identifying the peer entity.
Sockets utilizing the TCP protocol are either ``active'' or ``passive''. Active sockets initiate connections to passive sockets. By
default TCP sockets are created active; to create a passive socket the system call must be used after binding the socket with the system
call. Only passive sockets can use the call to accept incoming connections. Only active sockets can use the call to initiate connections.
Passive sockets can ``underspecify'' their location to match incoming connection requests from multiple networks. This technique, termed
``wildcard addressing'', allows a single server to provide service to clients on multiple networks. To create a socket that listens on all
networks, the Internet address INADDR_ANY must be bound. The TCP port can still be specified at this time. If the port is not specified,
the system will assign one. Once a connection has been established, the socket's address is fixed by the peer entity's location. The
address assigned the socket is the address associated with the network interface through which packets are being transmitted and received.
Normally, this address corresponds to the peer entity's network.
TCP supports one socket option that is set with and tested with Under most circumstances, TCP sends data when it is presented; when out-
standing data has not yet been acknowledged, it gathers small amounts of output to be sent in a single packet, once an acknowledgement is
received. For a small number of clients, such as window systems that send a stream of mouse events that receive no replies, this packeti-
zation may cause significant delays. Therefore, TCP provides a Boolean option, TCP_NODELAY (from to defeat this algorithm. The option
level for the call is the protocol number for TCP, available from
Diagnostics
A socket operation may fail with one of the following errors returned:
[EISCONN] Try to establish a connection on a socket which already has one.
[ENOBUFS] The system runs out of memory for an internal data structure.
[ETIMEDOUT] A connection was dropped due to excessive retransmissions.
[ECONNRESET] The remote peer forces the connection to be closed.
[ECONNREFUSED] The remote peer actively refuses connection establishment (usually because no process is listening to the port).
[EADDRINUSE] An attempt is made to create a socket with a port that has already been allocated.
[EADDRNOTAVAIL] An attempt is made to create a socket with a network address for which no network interface exists.
See Also
getsockopt(2), socket(2), inet(4f), intro(4n), ip(4p)
tcp(4p)