9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi
I'd like to check that a bunch of firewall rules have been applied and, therefore, want to write a script that basically does the following:
telnet serverA port1
telnet serverA port2
telnet serverB port1
telnet serverB port2
I would just compile the list in excel and run it as a... (2 Replies)
Discussion started by: jibberish
2 Replies
2. Solaris
Hello All,
I am trying find a command that would show me the stats of outgoing traffic on UPD ports on a Solaris 10 box. I would appreciate if anybody could help me out on this.
Thank you much!!!
Best Regards
Sudharma. (7 Replies)
Discussion started by: sudharma
7 Replies
3. Solaris
Hi can someone Explain me about Solaris Ports orientation, Like which all ports OS uses and which all is left for applications? (7 Replies)
Discussion started by: Sojourner
7 Replies
4. UNIX for Dummies Questions & Answers
So I am attempting to implement a UDP server on an older Solaris 9 box; the server will be handling packets at a rate of about 12/sec and will be constructing acknowledgment messages on the fly.
I've found snippets of sample code here and there on the net... should I be writing this from scratch... (1 Reply)
Discussion started by: allbread
1 Replies
5. Solaris
please provide info. @ how to open ports in solaris?
and how to check that which port assigns with which process. (5 Replies)
Discussion started by: ajitkraj
5 Replies
6. Solaris
:D Just curious, I know that solaris 2.0-2.x_present are System V UNIX... But, I have only used Solaris 10, 9 and 2.5... On a 2.5 Sparc box, after you login you get presented with the usual SunOS 5.5.1 then
UNIX(R) System V Release 4.0
I know Solaris 9 and 10 do not include this banner... ... (0 Replies)
Discussion started by: ssorel
0 Replies
7. IP Networking
I've setup Solaris IP Multipathing under Solaris whenever the hardware to do so was available. I find it amazing though that so few places I've worked at don't use it until I arrive. I wanted to find out if I'm running into all the exceptions, or is it really not being used? ... (3 Replies)
Discussion started by: kduffin
3 Replies
8. IP Networking
Just wondering if anyone knows of any good on-line documentation on TCP/UDP Ports. Basically i want to know how to check if they are in use, learn how to close them, etc...
Thanks... (5 Replies)
Discussion started by: eugene_mayo
5 Replies
9. UNIX for Dummies Questions & Answers
Just starting to work with unix, wondering if there is any good on-line documentation explaining TCP/UDP ports, how to use them, etc...
Thanks.... (1 Reply)
Discussion started by: eugene_mayo
1 Replies
UDP(4) BSD Kernel Interfaces Manual UDP(4)
NAME
udp -- Internet User Datagram Protocol
SYNOPSIS
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int
socket(AF_INET, SOCK_DGRAM, 0);
DESCRIPTION
UDP is a simple, unreliable datagram protocol which is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP
sockets are connectionless, and are normally used with the sendto(2) and recvfrom(2) calls, though the connect(2) call may also be used to
fix the destination for future packets (in which case the recv(2) or read(2) and send(2) or write(2) system calls may be used).
UDP address formats are identical to those used by TCP. In particular UDP provides a port identifier in addition to the normal Internet
address format. Note that the UDP port space is separate from the TCP port space (i.e., a UDP port may not be ``connected'' to a TCP port).
In addition broadcast packets may be sent (assuming the underlying network supports this) by using a reserved ``broadcast address''; this
address is network interface dependent.
Options at the IP transport level may be used with UDP; see ip(4).
MIB VARIABLES
The udp protocol implements a number of variables in the net.inet branch of the sysctl(3) MIB.
UDPCTL_CHECKSUM (udp.checksum) Enable udp checksums (enabled by default).
UDPCTL_MAXDGRAM (udp.maxdgram) Maximum outgoing UDP datagram size
UDPCTL_RECVSPACE (udp.recvspace) Maximum space for incoming UDP datagrams
udp.log_in_vain For all udp datagrams, to ports on which there is no socket listening, log the connection attempt (disabled by default).
udp.blackhole When a datagram is received on a port where there is no socket listening, do not return an ICMP port unreachable message.
(Disabled by default. See blackhole(4).)
ERRORS
A socket operation may fail with one of the following errors returned:
[EISCONN] when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the desti-
nation address specified and the socket is already connected;
[ENOTCONN] when trying to send a datagram, but no destination address is specified, and the socket has not been connected;
[ENOBUFS] when the system runs out of memory for an internal data structure;
[EADDRINUSE] when an attempt is made to create a socket with a port which has already been allocated;
[EADDRNOTAVAIL] when an attempt is made to create a socket with a network address for which no network interface exists.
SEE ALSO
getsockopt(2), recv(2), send(2), socket(2), blackhole(4), inet(4), intro(4), ip(4)
HISTORY
The udp protocol appeared in 4.2BSD.
BSD
June 5, 1993 BSD