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diff --git a/man7/ipv6.7 b/man7/ipv6.7 deleted file mode 100644 index 18acdc9..0000000 --- a/man7/ipv6.7 +++ /dev/null @@ -1,416 +0,0 @@ -.\" SPDX-License-Identifier: Linux-man-pages-1-para -.\" -.\" This man page is Copyright (C) 2000 Andi Kleen <ak@muc.de>. -.\" -.\" $Id: ipv6.7,v 1.3 2000/12/20 18:10:31 ak Exp $ -.\" -.\" The following socket options are undocumented -.\" All of the following are from: -.\" commit 333fad5364d6b457c8d837f7d05802d2aaf8a961 -.\" Author: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> -.\" Support several new sockopt / ancillary data in Advanced API (RFC3542). -.\" IPV6_2292PKTINFO (2.6.14) -.\" Formerly IPV6_PKTINFO -.\" IPV6_2292HOPOPTS (2.6.14) -.\" Formerly IPV6_HOPOPTS, which is documented -.\" IPV6_2292DSTOPTS (2.6.14) -.\" Formerly IPV6_DSTOPTS, which is documented -.\" IPV6_2292RTHDR (2.6.14) -.\" Formerly IPV6_RTHDR, which is documented -.\" IPV6_2292PKTOPTIONS (2.6.14) -.\" Formerly IPV6_PKTOPTIONS -.\" IPV6_2292HOPLIMIT (2.6.14) -.\" Formerly IPV6_HOPLIMIT, which is documented -.\" -.\" IPV6_RECVHOPLIMIT (2.6.14) -.\" IPV6_RECVHOPOPTS (2.6.14) -.\" IPV6_RTHDRDSTOPTS (2.6.14) -.\" IPV6_RECVRTHDR (2.6.14) -.\" IPV6_RECVDSTOPTS (2.6.14) -.\" -.\" IPV6_RECVPATHMTU (Linux 2.6.35, flag value added in Linux 2.6.14) -.\" commit 793b14731686595a741d9f47726ad8b9a235385a -.\" Author: Brian Haley <brian.haley@hp.com> -.\" IPV6_PATHMTU (Linux 2.6.35, flag value added in Linux 2.6.14) -.\" commit 793b14731686595a741d9f47726ad8b9a235385a -.\" Author: Brian Haley <brian.haley@hp.com> -.\" IPV6_DONTFRAG (Linux 2.6.35, flag value added in Linux 2.6.14) -.\" commit 793b14731686595a741d9f47726ad8b9a235385a -.\" Author: Brian Haley <brian.haley@hp.com> -.\" commit 4b340ae20d0e2366792abe70f46629e576adaf5e -.\" Author: Brian Haley <brian.haley@hp.com> -.\" -.\" IPV6_RECVTCLASS (Linux 2.6.14) -.\" commit 41a1f8ea4fbfcdc4232f023732584aae2220de31 -.\" Author: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> -.\" Based on patch from David L Stevens <dlstevens@us.ibm.com> -.\" -.\" IPV6_CHECKSUM (Linux 2.2) -.\" IPV6_NEXTHOP (Linux 2.2) -.\" IPV6_JOIN_ANYCAST (Linux 2.4.21 / Linux 2.6) -.\" IPV6_LEAVE_ANYCAST (Linux 2.4.21 / Linux 2.6) -.\" IPV6_FLOWLABEL_MGR (Linux 2.2.7 / Linux 2.4) -.\" IPV6_FLOWINFO_SEND (Linux 2.2.7 / Linux 2.4) -.\" IPV6_IPSEC_POLICY (Linux 2.6) -.\" IPV6_XFRM_POLICY (Linux 2.6) -.\" IPV6_TCLASS (Linux 2.6) -.\" -.\" IPV6_ADDR_PREFERENCES (Linux 2.6.26) -.\" commit 7cbca67c073263c179f605bdbbdc565ab29d801d -.\" Author: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> -.\" IPV6_MINHOPCOUNT (Linux 2.6.35) -.\" commit e802af9cabb011f09b9c19a82faef3dd315f27eb -.\" Author: Stephen Hemminger <shemminger@vyatta.com> -.\" IPV6_ORIGDSTADDR (Linux 2.6.37) -.\" Actually a CMSG rather than a sockopt? -.\" In header file, we have IPV6_RECVORIGDSTADDR == IPV6_ORIGDSTADDR -.\" commit 6c46862280c5f55eda7750391bc65cd7e08c7535 -.\" Author: Balazs Scheidler <bazsi@balabit.hu> -.\" IPV6_RECVORIGDSTADDR (Linux 2.6.37) -.\" commit 6c46862280c5f55eda7750391bc65cd7e08c7535 -.\" Author: Balazs Scheidler <bazsi@balabit.hu> -.\" Support for IPV6_RECVORIGDSTADDR sockopt for UDP sockets -.\" were contributed by Harry Mason. -.\" IPV6_TRANSPARENT (Linux 2.6.37) -.\" commit 6c46862280c5f55eda7750391bc65cd7e08c7535 -.\" Author: Balazs Scheidler <bazsi@balabit.hu> -.\" IPV6_UNICAST_IF (Linux 3.4) -.\" commit c4062dfc425e94290ac427a98d6b4721dd2bc91f -.\" Author: Erich E. Hoover <ehoover@mines.edu> -.\" -.TH ipv6 7 2023-10-31 "Linux man-pages 6.7" -.SH NAME -ipv6 \- Linux IPv6 protocol implementation -.SH SYNOPSIS -.nf -.B #include <sys/socket.h> -.B #include <netinet/in.h> -.P -.IB tcp6_socket " = socket(AF_INET6, SOCK_STREAM, 0);" -.IB raw6_socket " = socket(AF_INET6, SOCK_RAW, " protocol ");" -.IB udp6_socket " = socket(AF_INET6, SOCK_DGRAM, " protocol ");" -.fi -.SH DESCRIPTION -Linux 2.2 optionally implements the Internet Protocol, version 6. -This man page contains a description of the IPv6 basic API as -implemented by the Linux kernel and glibc 2.1. -The interface -is based on the BSD sockets interface; see -.BR socket (7). -.P -The IPv6 API aims to be mostly compatible with the -IPv4 API (see -.BR ip (7)). -Only differences are described in this man page. -.P -To bind an -.B AF_INET6 -socket to any process, the local address should be copied from the -.I in6addr_any -variable which has -.I in6_addr -type. -In static initializations, -.B IN6ADDR_ANY_INIT -may also be used, which expands to a constant expression. -Both of them are in network byte order. -.P -The IPv6 loopback address (::1) is available in the global -.I in6addr_loopback -variable. -For initializations, -.B IN6ADDR_LOOPBACK_INIT -should be used. -.P -IPv4 connections can be handled with the v6 API by using the -v4-mapped-on-v6 address type; -thus a program needs to support only this API type to -support both protocols. -This is handled transparently by the address -handling functions in the C library. -.P -IPv4 and IPv6 share the local port space. -When you get an IPv4 connection -or packet to an IPv6 socket, -its source address will be mapped to v6. -.SS Address format -.in +4n -.EX -struct sockaddr_in6 { - sa_family_t sin6_family; /* AF_INET6 */ - in_port_t sin6_port; /* port number */ - uint32_t sin6_flowinfo; /* IPv6 flow information */ - struct in6_addr sin6_addr; /* IPv6 address */ - uint32_t sin6_scope_id; /* Scope ID (new in Linux 2.4) */ -}; -\& -struct in6_addr { - unsigned char s6_addr[16]; /* IPv6 address */ -}; -.EE -.in -.P -.I sin6_family -is always set to -.BR AF_INET6 ; -.I sin6_port -is the protocol port (see -.I sin_port -in -.BR ip (7)); -.I sin6_flowinfo -is the IPv6 flow identifier; -.I sin6_addr -is the 128-bit IPv6 address. -.I sin6_scope_id -is an ID depending on the scope of the address. -It is new in Linux 2.4. -Linux supports it only for link-local addresses, in that case -.I sin6_scope_id -contains the interface index (see -.BR netdevice (7)) -.P -IPv6 supports several address types: unicast to address a single -host, multicast to address a group of hosts, -anycast to address the nearest member of a group of hosts -(not implemented in Linux), IPv4-on-IPv6 to -address an IPv4 host, and other reserved address types. -.P -The address notation for IPv6 is a group of 8 4-digit hexadecimal -numbers, separated with a \[aq]:\[aq]. -\&"::" stands for a string of 0 bits. -Special addresses are ::1 for loopback and ::FFFF:<IPv4 address> -for IPv4-mapped-on-IPv6. -.P -The port space of IPv6 is shared with IPv4. -.SS Socket options -IPv6 supports some protocol-specific socket options that can be set with -.BR setsockopt (2) -and read with -.BR getsockopt (2). -The socket option level for IPv6 is -.BR IPPROTO_IPV6 . -A boolean integer flag is zero when it is false, otherwise true. -.TP -.B IPV6_ADDRFORM -Turn an -.B AF_INET6 -socket into a socket of a different address family. -Only -.B AF_INET -is currently supported for that. -It is allowed only for IPv6 sockets -that are connected and bound to a v4-mapped-on-v6 address. -The argument is a pointer to an integer containing -.BR AF_INET . -This is useful to pass v4-mapped sockets as file descriptors to -programs that don't know how to deal with the IPv6 API. -.TP -.B IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP -Control membership in multicast groups. -Argument is a pointer to a -.IR "struct ipv6_mreq" . -.TP -.B IPV6_MTU -.BR getsockopt (): -Retrieve the current known path MTU of the current socket. -Valid only when the socket has been connected. -Returns an integer. -.IP -.BR setsockopt (): -Set the MTU to be used for the socket. -The MTU is limited by the device -MTU or the path MTU when path MTU discovery is enabled. -Argument is a pointer to integer. -.TP -.B IPV6_MTU_DISCOVER -Control path-MTU discovery on the socket. -See -.B IP_MTU_DISCOVER -in -.BR ip (7) -for details. -.TP -.B IPV6_MULTICAST_HOPS -Set the multicast hop limit for the socket. -Argument is a pointer to an -integer. -\-1 in the value means use the route default, otherwise it should be -between 0 and 255. -.TP -.B IPV6_MULTICAST_IF -Set the device for outgoing multicast packets on the socket. -This is allowed only for -.B SOCK_DGRAM -and -.B SOCK_RAW -socket. -The argument is a pointer to an interface index (see -.BR netdevice (7)) -in an integer. -.TP -.B IPV6_MULTICAST_LOOP -Control whether the socket sees multicast packets that it has send itself. -Argument is a pointer to boolean. -.TP -.BR IPV6_RECVPKTINFO " (since Linux 2.6.14)" -Set delivery of the -.B IPV6_PKTINFO -control message on incoming datagrams. -Such control messages contain a -.IR "struct in6_pktinfo" , -as per RFC 3542. -Allowed only for -.B SOCK_DGRAM -or -.B SOCK_RAW -sockets. -Argument is a pointer to a boolean value in an integer. -.TP -.B \%IPV6_RTHDR, \%IPV6_AUTHHDR, \%IPV6_DSTOPTS, \%IPV6_HOPOPTS, \ -\%IPV6_FLOWINFO, \%IPV6_HOPLIMIT -Set delivery of control messages for incoming datagrams containing -extension headers from the received packet. -.B IPV6_RTHDR -delivers the routing header, -.B IPV6_AUTHHDR -delivers the authentication header, -.B IPV6_DSTOPTS -delivers the destination options, -.B IPV6_HOPOPTS -delivers the hop options, -.B IPV6_FLOWINFO -delivers an integer containing the flow ID, -.B IPV6_HOPLIMIT -delivers an integer containing the hop count of the packet. -The control messages have the same type as the socket option. -All these header options can also be set for outgoing packets -by putting the appropriate control message into the control buffer of -.BR sendmsg (2). -Allowed only for -.B SOCK_DGRAM -or -.B SOCK_RAW -sockets. -Argument is a pointer to a boolean value. -.TP -.B IPV6_RECVERR -Control receiving of asynchronous error options. -See -.B IP_RECVERR -in -.BR ip (7) -for details. -Argument is a pointer to boolean. -.TP -.B IPV6_ROUTER_ALERT -Pass forwarded packets containing a router alert hop-by-hop option to -this socket. -Allowed only for -.B 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. -Argument is a pointer to an integer. -\-1 in the value means use the route default, -otherwise it should be between 0 and 255. -.TP -.BR IPV6_V6ONLY " (since Linux 2.4.21 and 2.6)" -.\" See RFC 3493 -If this flag is set to true (nonzero), then the socket is restricted -to sending and receiving IPv6 packets only. -In this case, an IPv4 and an IPv6 application can bind -to a single port at the same time. -.IP -If this flag is set to false (zero), -then the socket can be used to send and receive packets -to and from an IPv6 address or an IPv4-mapped IPv6 address. -.IP -The argument is a pointer to a boolean value in an integer. -.IP -The default value for this flag is defined by the contents of the file -.IR /proc/sys/net/ipv6/bindv6only . -The default value for that file is 0 (false). -.\" FLOWLABEL_MGR, FLOWINFO_SEND -.SH ERRORS -.TP -.B ENODEV -The user tried to -.BR bind (2) -to a link-local IPv6 address, but the -.I sin6_scope_id -in the supplied -.I sockaddr_in6 -structure is not a valid -interface index. -.SH VERSIONS -Linux 2.4 will break binary compatibility for the -.I sockaddr_in6 -for 64-bit -hosts by changing the alignment of -.I in6_addr -and adding an additional -.I sin6_scope_id -field. -The kernel interfaces stay compatible, but a program including -.I sockaddr_in6 -or -.I in6_addr -into other structures may not be. -This is not -a problem for 32-bit hosts like i386. -.P -The -.I sin6_flowinfo -field is new in Linux 2.4. -It is transparently passed/read by the kernel -when the passed address length contains it. -Some programs that pass a longer address buffer and then -check the outgoing address length may break. -.SH NOTES -The -.I sockaddr_in6 -structure is bigger than the generic -.IR sockaddr . -Programs that assume that all address types can be stored safely in a -.I struct sockaddr -need to be changed to use -.I struct sockaddr_storage -for that instead. -.P -.BR SOL_IP , -.BR SOL_IPV6 , -.BR SOL_ICMPV6 , -and other -.B SOL_* -socket options are nonportable variants of -.BR IPPROTO_* . -See also -.BR ip (7). -.SH BUGS -The IPv6 extended API as in RFC\ 2292 is currently only partly -implemented; -although the 2.2 kernel has near complete support for receiving options, -the macros for generating IPv6 options are missing in glibc 2.1. -.P -IPSec support for EH and AH headers is missing. -.P -Flow label management is not complete and not documented here. -.P -This man page is not complete. -.SH SEE ALSO -.BR cmsg (3), -.BR ip (7) -.P -RFC\ 2553: IPv6 BASIC API; -Linux tries to be compliant to this. -RFC\ 2460: IPv6 specification. |