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authorVijay Subramanian <subramanian.vijay@gmail.com>2011-12-20 13:23:24 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-21 01:03:23 -0500
commitab56222a32b9dbaae19c1d37f07b0ac4fc3c27ec (patch)
treece5eff7879a1d80c419835171de13e52c24afdfb /net/ipv4
parent08f4fc9da9a04d59f5c937e06e375158abb68206 (diff)
tcp: Replace constants with #define macros
to record the state of SACK/FACK and DSACK for better readability and maintenance. Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/syncookies.c2
-rw-r--r--net/ipv4/tcp_input.c6
2 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 90f6544c13e2..51fdbb490437 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -245,7 +245,7 @@ bool cookie_check_timestamp(struct tcp_options_received *tcp_opt, bool *ecn_ok)
if (!sysctl_tcp_timestamps)
return false;
- tcp_opt->sack_ok = (options >> 4) & 0x1;
+ tcp_opt->sack_ok = (options & (1 << 4)) ? TCP_SACK_SEEN : 0;
*ecn_ok = (options >> 5) & 1;
if (*ecn_ok && !sysctl_tcp_ecn)
return false;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index f131d92d25ee..2877c3e09587 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -865,13 +865,13 @@ static void tcp_disable_fack(struct tcp_sock *tp)
/* RFC3517 uses different metric in lost marker => reset on change */
if (tcp_is_fack(tp))
tp->lost_skb_hint = NULL;
- tp->rx_opt.sack_ok &= ~2;
+ tp->rx_opt.sack_ok &= ~TCP_FACK_ENABLED;
}
/* Take a notice that peer is sending D-SACKs */
static void tcp_dsack_seen(struct tcp_sock *tp)
{
- tp->rx_opt.sack_ok |= 4;
+ tp->rx_opt.sack_ok |= TCP_DSACK_SEEN;
}
/* Initialize metrics on socket. */
@@ -3878,7 +3878,7 @@ void tcp_parse_options(const struct sk_buff *skb, struct tcp_options_received *o
case TCPOPT_SACK_PERM:
if (opsize == TCPOLEN_SACK_PERM && th->syn &&
!estab && sysctl_tcp_sack) {
- opt_rx->sack_ok = 1;
+ opt_rx->sack_ok = TCP_SACK_SEEN;
tcp_sack_reset(opt_rx);
}
break;