iperf3/src/net.h

#ifndef __NET_H
#define __NET_H

int netdial(int, int, char *, char *, int);
int netannounce(int, int, char *, int);
int Nwrite(int, void *, int, int);
int Nread(int, void *, int, int);
int getsock_tcp_mss(int);
int set_tcp_options(int, int, int);
int setnonblocking(int);

unsigned long long htonll(unsigned long long);
unsigned long long ntohll(unsigned long long);

/* XXX: Need a better check for byte order */
#if BYTE_ORDER == BIG_ENDIAN
#define HTONLL(n) (n)
#define NTOHLL(n) (n)
#else
#define HTONLL(n) ((((unsigned long long)(n) & 0xFF) << 56) | \
                   (((unsigned long long)(n) & 0xFF00) << 40) | \
                   (((unsigned long long)(n) & 0xFF0000) << 24) | \
                   (((unsigned long long)(n) & 0xFF000000) << 8) | \
                   (((unsigned long long)(n) & 0xFF00000000) >> 8) | \
                   (((unsigned long long)(n) & 0xFF0000000000) >> 24) | \
                   (((unsigned long long)(n) & 0xFF000000000000) >> 40) | \
                   (((unsigned long long)(n) & 0xFF00000000000000) >> 56))

#define NTOHLL(n) ((((unsigned long long)(n) & 0xFF) << 56) | \
                   (((unsigned long long)(n) & 0xFF00) << 40) | \
                   (((unsigned long long)(n) & 0xFF0000) << 24) | \
                   (((unsigned long long)(n) & 0xFF000000) << 8) | \
                   (((unsigned long long)(n) & 0xFF00000000) >> 8) | \
                   (((unsigned long long)(n) & 0xFF0000000000) >> 24) | \
                   (((unsigned long long)(n) & 0xFF000000000000) >> 40) | \
                   (((unsigned long long)(n) & 0xFF00000000000000) >> 56))
#endif

#define htonll(n) HTONLL(n)
#define ntohll(n) NTOHLL(n)

#endif