TCP/IP Programming Manual

in getipnodebyaddr library routine, 115
in getipnodebyname library routine, 117
U
UDP
defined, 25
nowait operations, 41
port and broadcasting, 100
receiving data on nowait socket, 161, 164, 201, 203
receiving data on waited socket, 158, 160
selecting a socket, 31
sending data on nowait socket, 180, 182, 204, 206
sending data on waited socket, 177, 179
socket control limitation, 199
UNIX
differences from Guardian environment, 32
signals, 33
Urgent data pending, 33
User protocol socket level (TCP/IP), 185
Using the DEFINE command, 29
W
Waited operations
for TCP clients and servers, 39
used by socket routines, 85
Well-known IP protocol numbers, 241
Well-known port number see Port number
Wide-data model routines, 81
262 Index