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tweaks
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man7/ipv6.7
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man7/ipv6.7
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@ -4,7 +4,7 @@
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.\" and in case of nontrivial modification author and date
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.\" and in case of nontrivial modification author and date
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.\" of the modification is added to the header.
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.\" of the modification is added to the header.
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.\" $Id: ipv6.7,v 1.3 2000/12/20 18:10:31 ak Exp $
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.\" $Id: ipv6.7,v 1.3 2000/12/20 18:10:31 ak Exp $
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.TH IPV6 7 2007-10-14 "Linux" "Linux Programmer's Manual"
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.TH IPV6 7 2008-07-17 "Linux" "Linux Programmer's Manual"
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.SH NAME
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.SH NAME
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ipv6, PF_INET6 \- Linux IPv6 protocol implementation
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ipv6, PF_INET6 \- Linux IPv6 protocol implementation
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.SH SYNOPSIS
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.SH SYNOPSIS
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@ -141,7 +141,6 @@ structure.
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.\" FIXME IPV6_CHECKSUM is not documented, and probably should be
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.\" FIXME IPV6_CHECKSUM is not documented, and probably should be
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.\" FIXME IPV6_JOIN_ANYCAST is not documented, and probably should be
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.\" FIXME IPV6_JOIN_ANYCAST is not documented, and probably should be
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.\" FIXME IPV6_LEAVE_ANYCAST is not documented, and probably should be
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.\" FIXME IPV6_LEAVE_ANYCAST is not documented, and probably should be
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.\" FIXME IPV6_V6ONLY is not documented, and probably should be
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.\" FIXME IPV6_RECVPKTINFO is not documented, and probably should be
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.\" FIXME IPV6_RECVPKTINFO is not documented, and probably should be
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.\" FIXME IPV6_2292PKTINFO is not documented, and probably should be
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.\" FIXME IPV6_2292PKTINFO is not documented, and probably should be
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.\" FIXME there are probably many other IPV6_* socket options that
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.\" FIXME there are probably many other IPV6_* socket options that
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@ -250,6 +249,23 @@ Set the unicast hop limit for the socket.
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Argument is a pointer to an integer.
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Argument is a pointer to an integer.
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\-1 in the value means use the route default,
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\-1 in the value means use the route default,
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otherwise it should be between 0 and 255.
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otherwise it should be between 0 and 255.
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.TP
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.BR IPV6_V6ONLY " (since Linux 2.4.21 and 2.6)"
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.\" See RFC 3493
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If this flag is set to true (non-zero), then the socket is restricted
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to sending and receiving IPv6 packets only.
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In this case, an IPv4 and an IPv6 application can bind
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to a single port at the same time.
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If this flag is set to false (zero),
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then the socket can be used to send and receive packets
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to and from an IPv6 address or an IPv4-mapped IPv6 address.
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The argument is a pointer to a boolean value in an integer.
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The default value for this flag is defined by the contents of the file
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.BR /proc/sys/net/ipv6/bindv6only .
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The default value for that file is 0 (false).
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.\" FLOWLABEL_MGR, FLOWINFO_SEND
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.\" FLOWLABEL_MGR, FLOWINFO_SEND
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.SH VERSIONS
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.SH VERSIONS
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The older
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The older
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