fprintf(stderr, "\t-S num -- set SO_SNDBUF to num\n");
fprintf(stderr, "\t-R num -- set SO_RCVBUF to num\n");
fprintf(stderr, "\t-p num -- use port num\n");
- fprintf(stderr, "\t-m [MPTCP|TCP] -- use tcp or mptcp sockets\n");
- fprintf(stderr, "\t-s [mmap|poll] -- use poll (default) or mmap\n");
+ fprintf(stderr, "\t-s [MPTCP|TCP] -- use mptcp(default) or tcp sockets\n");
+ fprintf(stderr, "\t-m [poll|mmap|sendfile] -- use poll(default)/mmap+write/sendfile\n");
fprintf(stderr, "\t-u -- check mptcp ulp\n");
fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n");
exit(1);