Fix description of IPV6_ROUTER_ALERT option

diff --git a/man7/ipv6.7 b/man7/ipv6.7
index ba2b7eb03f645e0e39890a96022a48877ff75ff4..63c6faf927975f3bc9d2e9961df818fc2d462c40 100644 (file)
--- a/man7/ipv6.7
+++ b/man7/ipv6.7
@@ -4,7 +4,7 @@
 .\" and in case of nontrivial modification author and date
 .\" of the modification is added to the header.
 .\" $Id: ipv6.7,v 1.3 2000/12/20 18:10:31 ak Exp $
-.TH IPV6 7 1999-06-29 "Linux" "Linux Programmer's Manual"
+.TH IPV6 7 2007-10-14 "Linux" "Linux Programmer's Manual"
 .SH NAME
 ipv6, PF_INET6 \- Linux IPv6 protocol implementation
 .SH SYNOPSIS
@@ -233,10 +233,17 @@ for details.
 Argument is a pointer to boolean.
 .TP
 .B IPV6_ROUTER_ALERT
-Pass all forwarded packets containing a router alert option to
+Pass forwarded packets containing a router alert hop-by-hop option to
 this socket.
-Only allowed for datagram sockets and for root.
-Argument is a pointer to boolean.
+Only allowed for SOCK_RAW sockets.
+The tapped packets are not forwarded by the kernel, it is the
+user's responsibility to send them out again.
+Argument is a pointer to an integer.
+A positive integer indicates a router alert option value to intercept.
+Packets carrying a router alert option with a value field containing
+this integer will be delivered to the socket.
+A negative integer disables delivery of packets with router alert options
+to this socket.
 .TP
 .B IPV6_UNICAST_HOPS
 Set the unicast hop limit for the socket.