Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
probe::udp.sendmsg - Fires whenever a process sends a UDP message
SYNOPSIS
udp.sendmsg
VALUES
sock
Network socket used by the process
size
Number of bytes sent by the process
name
The name of this probe
saddr
A string representing the source IP address
daddr
A string representing the destination IP address
sport
UDP source port
dport
UDP destination port
family
IP address family
CONTEXT
The process which sent a UDP message
SEE ALSO
tapset::udp(3stap)
SystemTap Tapset Reference April 2016 PROBE::UDP.SENDMSG(3stap)