10 More Discussions You Might Find Interesting
1. IP Networking
I was just wondering, why does Nmap need root when doing an -sU UDP Scan?
Please and Thank You. (3 Replies)
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2. Programming
hello to all
i want to use multithreading to my UDP broadcast server client program. will anyone help me by proving C code. i am working in fedora. also my requirement is POSIX compliance.please help me..... (6 Replies)
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3. IP Networking
hello to all
i want to use multithreading to my UDP broadcast server client program. will anyone help me by proving C code. i am working in fedora. also my requirement is POSIX compliance.please help me..... (0 Replies)
Discussion started by: moti12
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4. Infrastructure Monitoring
hi guys
My linux server have SNMP configure port by default is 161 (UDP)
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5. UNIX for Dummies Questions & Answers
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6. Windows & DOS: Issues & Discussions
Hi,
I know tcp port tunneling can be done using ssh/putty. how about udp?
I have a scenario where a license server handsout licenses to machines in that network ONLY. I have a windows machine in a different subnet and even though the client software can see license server, while using the... (6 Replies)
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7. Cybersecurity
I want to deny a particular malicious UDP packet. I can readily identify this packet from the rest by looking at the data section, where data offset 2 is 0xaa, data is 0xbb, etc. Are there any tools or code samples that can do this?
Basically, instead of seeing the packet in the following... (2 Replies)
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8. UNIX for Advanced & Expert Users
Hi,
I can see "udpInOverflows" errors when I execute 'netstat -s' on my Solaris box.
The number of errors are small - about 40.
e.g.
$ netstat -s|grep udp
UDP udpInDatagrams =1249190732 udpInErrors = 0
udpOutDatagrams =31663030 udpOutErrors = 0... (1 Reply)
Discussion started by: chaandana
1 Replies
9. UNIX for Dummies Questions & Answers
Hi...Please can someone send me implementation chat application using UDP(socket programming in C). Please send me as soon as possible. Thanks in advance. (2 Replies)
Discussion started by: unsweety
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10. IP Networking
hi...
i have made this client server prog with UDP sockets but im not getting the output. the client sends the message but the server just keeps on waiting. Im running the prog an a solaris 10 box...
server:
main()
{
int sd;
struct sockaddr_in server;
char buf;
int rc,len;
... (2 Replies)
Discussion started by: strider
2 Replies
udp(4p) udp(4p)
Name
udp - Internet User Datagram Protocol
Syntax
#include <sys/socket.h>
#include <netinet/in.h>
s = socket(AF_INET, SOCK_DGRAM, 0);
Description
UDP is a simple, unreliable datagram protocol that is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP
sockets are connectionless and are normally used with the and calls, though the call can also be used to fix the destination for future
packets (in which case the or and or 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 (for example, a UDP port may not be ``connected'' to a
TCP port). In addition broadcast packets can be sent (assuming the underlying network supports this) by using a reserved ``broadcast
address''; this address is network interface dependent. The SO_BROADCAST option must be set on the socket for broadcasting to succeed.
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, or when trying to send a datagram with the destination
address specified and the socket already connected.
[ENOTCONN] Try to send a datagram, but no destination address is specified, and the socket has not been connected.
[ENOBUFS] The system runs out of memory for an internal data structure.
[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), send(2), socket(2) recv(2), intro(4n), inet(4f)
udp(4p)