diff options
Diffstat (limited to 'man7/ipv6.7')
| -rw-r--r-- | man7/ipv6.7 | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/man7/ipv6.7 b/man7/ipv6.7 index e6f9d54..18acdc9 100644 --- a/man7/ipv6.7 +++ b/man7/ipv6.7 @@ -78,14 +78,14 @@ .\" commit c4062dfc425e94290ac427a98d6b4721dd2bc91f .\" Author: Erich E. Hoover <ehoover@mines.edu> .\" -.TH ipv6 7 2023-07-30 "Linux man-pages 6.05.01" +.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> -.PP +.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 ");" @@ -97,12 +97,12 @@ implemented by the Linux kernel and glibc 2.1. The interface is based on the BSD sockets interface; see .BR socket (7). -.PP +.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. -.PP +.P To bind an .B AF_INET6 socket to any process, the local address should be copied from the @@ -114,21 +114,21 @@ 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. -.PP +.P The IPv6 loopback address (::1) is available in the global .I in6addr_loopback variable. For initializations, .B IN6ADDR_LOOPBACK_INIT should be used. -.PP +.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. -.PP +.P IPv4 and IPv6 share the local port space. When you get an IPv4 connection or packet to an IPv6 socket, @@ -149,7 +149,7 @@ struct in6_addr { }; .EE .in -.PP +.P .I sin6_family is always set to .BR AF_INET6 ; @@ -169,19 +169,19 @@ Linux supports it only for link-local addresses, in that case .I sin6_scope_id contains the interface index (see .BR netdevice (7)) -.PP +.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. -.PP +.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. -.PP +.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 @@ -368,7 +368,7 @@ or into other structures may not be. This is not a problem for 32-bit hosts like i386. -.PP +.P The .I sin6_flowinfo field is new in Linux 2.4. @@ -386,7 +386,7 @@ Programs that assume that all address types can be stored safely in a need to be changed to use .I struct sockaddr_storage for that instead. -.PP +.P .BR SOL_IP , .BR SOL_IPV6 , .BR SOL_ICMPV6 , @@ -401,16 +401,16 @@ 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. -.PP +.P IPSec support for EH and AH headers is missing. -.PP +.P Flow label management is not complete and not documented here. -.PP +.P This man page is not complete. .SH SEE ALSO .BR cmsg (3), .BR ip (7) -.PP +.P RFC\ 2553: IPv6 BASIC API; Linux tries to be compliant to this. RFC\ 2460: IPv6 specification. |