hi all

i'm working in Redhat Linux 7.3 with the 2.4.18-3 kernel... i'm getting compile messages saying that the SOL_TCP and TCP_NODELAY constants are undefined... i was quite sure i'd included the correct header files for these constants... anyway, i went looking into the header files themselves and found that they weren't there... what am i missing?

these are the header files i'm including:
Code:
#include <stdio.h> 
#include <stdlib.h> 
#include <errno.h> 
#include <sys/types.h> 
#include <sys/socket.h> 
#include <arpa/inet.h> 
#include <netdb.h> 
#include <pthread.h> 
#include <unistd.h> 
#include <time.h>
thanks a bunch!