tcp.7: Note that MSG_PEEK can be used on out-of-band data

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man7/tcp.7 b/man7/tcp.7
index f567862ffe1556c617f07ccf08ad8ec5f4e2b4a3..c9652ea76fb13382dc6e30512cecad337e8cbf5f 100644 (file)
--- a/man7/tcp.7
+++ b/man7/tcp.7
@@ -970,6 +970,11 @@ This violates RFC\ 1122, but is
 required for interoperability with other stacks.
 It can be changed via
 .IR /proc/sys/net/ipv4/tcp_stdurg .
+
+It is possible to peek at out-of-band data using the
+.IR recv (2)
+.B MSG_PEEK
+flag.
 .SS Ioctls
 These following
 .BR ioctl (2)