The argument is a pointer to an interface indexĬontrol whether the socket sees multicast packets that it This is allowed only for SOCK_DGRAM and SOCK_RAW Set the device for outgoing multicast packets on the Route default, otherwise it should be between 0 and 255. Set the multicast hop limit for the socket. Argument is a pointer toĬontrol path-MTU discovery on the socket. MTU is limited by the device MTU or the path MTU when path Setsockopt(): Set the MTU to be used for the socket. IPV6_MTU getsockopt(): Retrieve the current known path MTU of theĬurrent socket. IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIPĬontrol membership in multicast groups.
Ipv6 loopback how to#
This is useful to pass v4-mapped sockets as fileĭescriptors to programs that don't know how to deal with TheĪrgument is a pointer to an integer containing AF_INET. It is allowed only for IPv6 sockets that areĬonnected and bound to a v4-mapped-on-v6 address. Turn an AF_INET6 socket into a socket of a differentĪddress family. Set with setsockopt(2) and read with getsockopt(2). IPv6 supports some protocol-specific socket options that can be The port space of IPv6 is shared with IPv4. Special addresses are ::1 for loopback and ::FFFF: for IPv4-mapped-on-IPv6. The address notation for IPv6 is a group of 8 4-digit hexadecimal Linux), IPv4-on-IPv6 to address an IPv4 host, and other reserved The nearest member of a group of hosts (not implemented in Host, multicast to address a group of hosts, anycast to address IPv6 supports several address types: unicast to address a single That case sin6_scope_id contains the interface index (see Linux supports it only for link-local addresses, in Is an ID depending on the scope of the address. Identifier sin6_addr is the 128-bit IPv6 address.
Port (see sin_port in ip(7)) sin6_flowinfo is the IPv6 flow Sin6_family is always set to AF_INET6 sin6_port is the protocol Uint32_t sin6_scope_id /* Scope ID (new in 2.4) */ Struct in6_addr sin6_addr /* IPv6 address */ Uint32_t sin6_flowinfo /* IPv6 flow information */ When you get an IPv4Ĭonnection or packet to an IPv6 socket, its source address willīe mapped to v6 and it will be mapped to v6. IPv4 and IPv6 share the local port space. Transparently by the address handling functions in the C library. Only this API type to support both protocols. V4-mapped-on-v6 address type thus a program needs to support IPv4 connections can be handled with the v6 API by using the The IPv6 loopback address (::1) is available in the global Used, which expands to a constant expression. In static initializations, IN6ADDR_ANY_INIT may also be Should be copied from the in6addr_any variable which has in6_addr To bind an AF_INET6 socket to any process, the local address Only differences are described in this man page. The IPv6 API aims to be mostly compatible with the IPv4 API (see The interface isīased on the BSD sockets interface see socket(7). Implemented by the Linux kernel and glibc 2.1. This man page contains a description of the IPv6 basic API as Linux 2.2 optionally implements the Internet Protocol, version 6. SYNOPSIS top #include #include tcp6_socket = socket(AF_INET6, SOCK_STREAM, 0) raw6_socket = socket(AF_INET6, SOCK_RAW, protocol ) udp6_socket = socket(AF_INET6, SOCK_DGRAM, protocol ) DESCRIPTION top
Ipv6 - Linux IPv6 protocol implementation
Ipv6 loopback manual#
IPV6(7) Linux Programmer's Manual IPV6(7) NAME top
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