net/proto-tcp.c

   1 #include <stdlib.h>
   2 #include <linux/tcp.h>
   3 #include "net.h"
   4 #include "maps.h"       // page_rand
   5 #include "compat.h"
   6 #include "utils.h"      // ARRAY_SIZE
   7
   8 #define SOL_TCP 6
   9
  10 #define NR_SOL_TCP_OPTS ARRAY_SIZE(tcp_opts)
  11 static const unsigned int tcp_opts[] = { TCP_NODELAY, TCP_MAXSEG, TCP_CORK, TCP_KEEPIDLE,
  12         TCP_KEEPINTVL, TCP_KEEPCNT, TCP_SYNCNT, TCP_LINGER2,
  13         TCP_DEFER_ACCEPT, TCP_WINDOW_CLAMP, TCP_INFO, TCP_QUICKACK,
  14         TCP_CONGESTION, TCP_MD5SIG, TCP_COOKIE_TRANSACTIONS, TCP_THIN_LINEAR_TIMEOUTS,
  15         TCP_THIN_DUPACK, TCP_USER_TIMEOUT, TCP_REPAIR, TCP_REPAIR_QUEUE,
  16         TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS, TCP_FASTOPEN};
  17
  18 void tcp_setsockopt(struct sockopt *so)
  19 {
  20         unsigned char val;
  21
  22         so->level = SOL_TCP;
  23
  24         val = rand() % NR_SOL_TCP_OPTS;
  25         so->optname = tcp_opts[val];
  26 }