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)
Discussion started by: amreason
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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?
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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
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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
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udp(7) Miscellaneous Information Manual udp(7)
NAME
udp - Internet user datagram protocol (UDP)
SYNOPSIS
#include <sys/socket.h> #include <netinet/in.h>
The following is the socket call for AF_INET sockets:
s = socket(AF_INET, SOCK_DGRAM, 0); The following is the socket call for AF_INET6 sockets:
s = socket(AF_INET6, 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 sendto() and recvfrom() functions, though the connect() function may also be
used to fix the destination for future packets, in which case the recv() or read() and send() or write() functions 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 (that is, a UDP port may not be "connected" to a TCP
port). In addition, IPv4 broadcast packets may be sent (assuming the underlying network supports this) by using a reserved "broadcast
address"; this address is network interface dependent. There is no broadcast address in IPv6.
Options at the IP transport level may be used with UDP; see the ip() reference page.
ERRORS
If a socket operation fails, errno may be set to one of the following values: An attempt was made to create a socket with a port that has
already been allocated. An attempt was made to create a socket with a network address for which no network interface exists. The socket
is already connected. This error occurs when trying to establish connection on a socket or when trying to send a datagram with the desti-
nation address specified. The system ran out of memory for an internal data structure. The destination address of a datagram was not
specified, and the socket has not been connected.
RELATED INFORMATION
Functions: getsockopt(2), recv(2), send(2), socket(2)
Files: netintro(7), inet(7), ip(7) delim off
udp(7)