{"id":4111,"date":"2022-12-20T17:39:25","date_gmt":"2022-12-20T20:39:25","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/address_families-man7\/"},"modified":"2022-12-20T17:39:25","modified_gmt":"2022-12-20T20:39:25","slug":"address_families-man7","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/address_families-man7\/","title":{"rendered":"ADDRESS_FAMILIES (man7)"},"content":{"rendered":"

ADDRESS_FAMILIES<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

address_families \u2212 socket address families (domains)<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

#include <\/b> \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var See NOTES bodies\/ usr\/
#include <\/b><\/p>\n

int socket(int<\/b> domain<\/i>, int<\/b> type<\/i>, int<\/b> protocol<\/i>);<\/b><\/p>\n

DESCRIPTION <\/a> <\/h2>\n

The domain<\/i> argument of the socket<\/b>(2) specifies a communication domain; this selects the protocol family which will be used for communication. These families are defined in <\/i>. The formats currently understood by the Linux kernel include:
AF_UNIX<\/b>, AF_LOCAL<\/b><\/p>\n

Local communication For further information, see unix<\/b>(7).<\/p>\n

AF_INET<\/b><\/p>\n

IPv4 Internet protocols. For further information, see ip<\/b>(7).<\/p>\n

AF_AX25<\/b><\/p>\n

Amateur radio AX.25 protocol. For further information, see ax25<\/b>(4).<\/p>\n\n\n
<\/td>\n\n

AF_IPX<\/b><\/p>\n<\/td>\n

<\/td>\n\n

IPX \u2212 Novell protocols.<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

AF_APPLETALK<\/b><\/p>\n

AppleTalk For further information, see ddp<\/b>(7).<\/p>\n

AF_NETROM<\/b><\/p>\n

AX.25 packet layer protocol. For further information, see netrom<\/b>(4), The Packet Radio Protocols and Linux<\/i><\/a> and the AX.25<\/i>, NET\/ROM<\/i>, and ROSE network programming<\/i> chapters of the Linux Amateur Radio AX.25 HOWTO<\/i><\/a>.<\/p>\n

AF_BRIDGE<\/b><\/p>\n

Can\u2019t be used for creating sockets; mostly used for bridge links in rtnetlink<\/b>(7) protocol commands.<\/p>\n

AF_ATMPVC<\/b><\/p>\n

Access to raw ATM Permanent Virtual Circuits (PVCs). For further information, see the ATM on Linux HOWTO<\/i><\/a>.<\/p>\n\n\n
<\/td>\n\n

AF_X25<\/b><\/p>\n<\/td>\n

<\/td>\n\n

ITU-T X.25 \/ ISO-8208 protocol. For further information, see x25<\/b>(7).<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_INET6<\/b><\/p>\n

IPv6 Internet protocols. For further information, see ipv6<\/b>(7).<\/p>\n

AF_ROSE<\/b><\/p>\n

RATS (Radio Amateur Telecommunications Society) Open Systems environment (ROSE) AX.25 packet layer protocol. For further information, see the resources listed for AF_NETROM<\/b>.<\/p>\n

AF_DECnet<\/b><\/p>\n

DECet protocol sockets. See Documentation\/networking\/decnet.txt<\/i> in the Linux kernel source tree for details.<\/p>\n

AF_NETBEUI<\/b><\/p>\n

Reserved for “802.2LLC project”; never used.<\/p>\n

AF_SECURITY<\/b><\/p>\n

This was a short-lived (between Linux 2.1.30 and 2.1.99pre2) protocol family for firewall upcalls.<\/p>\n\n\n
<\/td>\n\n

AF_KEY<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Key management protocol, originally developed for usage with IPsec (since Linux 2.1.38). This has no relation to keyctl<\/b>(2) and the in-kernel key storage facility. See RFC 2367 PF_KEY Key Management API, Version 2<\/i><\/a> for details.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_NETLINK<\/b><\/p>\n

Kernel user interface device For further information, see netlink<\/b>(7).<\/p>\n

AF_PACKET<\/b><\/p>\n

Low-level packet interface. For further information, see packet<\/b>(7).<\/p>\n

AF_ECONET<\/b><\/p>\n

Acorn Econet protocol (removed in Linux 3.5). See the Econet documentation<\/a> for details.<\/p>\n

AF_ATMSVC<\/b><\/p>\n

Access to ATM Switched Virtual Circuits (SVCs) See the ATM on Linux HOWTO<\/i><\/a> for details.<\/p>\n\n\n
<\/td>\n\n

AF_RDS<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Reliable Datagram Sockets (RDS) protocol (since Linux 2.6.30). RDS over RDMA has no relation to AF_SMC<\/b> or AF_XDP<\/b>. For further information see rds<\/b>(7), rds\u2212rdma<\/b>(7), and Documentation\/networking\/rds.txt<\/i> in the Linux kernel source tree.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_IRDA<\/b><\/p>\n

Socket interface over IrDA (moved to staging in Linux 4.14, removed in Linux 4.17). For further information see irda<\/b>(7).<\/p>\n

AF_PPPOX<\/b><\/p>\n

Generic PPP transport layer, for setting up L2 tunnels (L2TP and PPPoE). See Documentation\/networking\/l2tp.txt<\/i> in the Linux kernel source tree for details.<\/p>\n

AF_WANPIPE<\/b><\/p>\n

Legacy protocol for wide area network (WAN) connectivity that was used by Sangoma WAN cards (called “WANPIPE”); removed in Linux 2.6.21.<\/p>\n\n\n\n
<\/td>\n\n

AF_LLC<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Logical link control (IEEE 802.2 LLC) protocol, upper part of data link layer of ISO\/OSI networking protocol stack (since Linux 2.4); has no relation to AF_PACKET<\/b>. See chapter 13.5.3. Logical Link Control<\/i> in Understanding Linux Kernel Internals<\/i> (O\u2019Reilly Media, 2006) and IEEE Standards for Local Area Networks: Logical Link Control<\/i> (The Institute of Electronics and Electronics Engineers, Inc., New York, New York, 1985) for details. See also some historical notes<\/a> regarding its development.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

AF_IB<\/b><\/p>\n<\/td>\n

<\/td>\n\n

InfiniBand native addressing (since Linux 3.11).<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_MPLS<\/b><\/p>\n

Multiprotocol Label Switching (since Linux 4.1); mostly used for configuring MPLS routing via netlink<\/b>(7), as it doesn\u2019t expose ability to create sockets to user space.<\/p>\n\n\n
<\/td>\n\n

AF_CAN<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Controller Area Network automotive bus protocol (since Linux 2.6.25). See Documentation\/networking\/can.rst<\/i> in the Linux kernel source tree for details.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_TIPC<\/b><\/p>\n

TIPC, “cluster domain sockets” protocol (since Linux 2.6.16). See TIPC Programmer\u2019s Guide<\/i><\/a> and the protocol description<\/a> for details.<\/p>\n

AF_BLUETOOTH<\/b><\/p>\n

Bluetooth low-level socket protocol (since Linux 3.11). See Bluetooth Management API overview<\/i><\/a> and An Introduction to Bluetooth Programming<\/i> by Albert Huang<\/a> for details.<\/p>\n

AF_IUCV<\/b><\/p>\n

IUCV (inter-user communication vehicle) z\/VM protocol for hypervisor-guest interaction (since Linux 2.6.21); has no relation to AF_VSOCK<\/b> and\/or AF_SMC<\/b> See IUCV protocol overview<\/i><\/a> for details.<\/p>\n

AF_RXRPC<\/b><\/p>\n

Rx, Andrew File System remote procedure call protocol (since Linux 2.6.22). See Documentation\/networking\/rxrpc.txt<\/i> in the Linux kernel source tree for details.<\/p>\n

AF_ISDN<\/b><\/p>\n

New “modular ISDN” driver interface protocol (since Linux 2.6.27). See the mISDN wiki<\/a> for details.<\/p>\n

AF_PHONET<\/b><\/p>\n

Nokia cellular modem IPC\/RPC interface (since Linux 2.6.31). See Documentation\/networking\/phonet.txt<\/i> in the Linux kernel source tree for details.<\/p>\n

AF_IEEE802154<\/b><\/p>\n

IEEE 802.15.4 WPAN (wireless personal area network) raw packet protocol (since Linux 2.6.31). See Documentation\/networking\/ieee802154.txt<\/i> in the Linux kernel source tree for details.<\/p>\n

AF_CAIF<\/b><\/p>\n

Ericsson\u2019s Communication CPU to Application CPU interface (CAIF) protocol (since Linux 2.6.36). See Documentation\/networking\/caif\/Linux-CAIF.txt<\/i> in the Linux kernel source tree for details.<\/p>\n\n\n
<\/td>\n\n

AF_ALG<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Interface to kernel crypto API (since Linux 2.6.38). See Documentation\/crypto\/userspace-if.rst<\/i> in the Linux kernel source tree for details.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_VSOCK<\/b><\/p>\n

VMWare VSockets protocol for hypervisor-guest interaction (since Linux 3.9); has no relation to AF_IUCV<\/b> and AF_SMC<\/b>. For further information, see vsock<\/b>(7).<\/p>\n\n\n
<\/td>\n\n

AF_KCM<\/b><\/p>\n<\/td>\n

<\/td>\n\n

KCM (kernel connection multiplexer) interface (since Linux 4.6). See Documentation\/networking\/kcm.txt<\/i> in the Linux kernel source tree for details.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

AF_QIPCRTR<\/b><\/p>\n

Qualcomm IPC router interface protocol (since Linux 4.7).<\/p>\n\n\n\n
<\/td>\n\n

AF_SMC<\/b><\/p>\n<\/td>\n

<\/td>\n\n

SMC-R (shared memory communications over RDMA) protocol (since Linux 4.11), and SMC-D (shared memory communications, direct memory access) protocol for intra-node z\/VM quest interaction (since Linux 4.19); has no relation to AF_RDS<\/b>, AF_IUCV<\/b> or AF_VSOCK<\/b>. See RFC 7609 IBM\u2019s Shared Memory Communications over RDMA (SMC-R) Protocol<\/i><\/a> for details regarding SMC-R. See SMC-D Reference Information<\/i><\/a> for details regarding SMC-D.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

AF_XDP<\/b><\/p>\n<\/td>\n

<\/td>\n\n

XDP (express data path) interface (since Linux 4.18). See Documentation\/networking\/af_xdp.rst<\/i> in the Linux kernel source tree for details.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

SEE ALSO <\/a> <\/h2>\n

socket<\/b>(2), socket<\/b>(7)<\/p>\n

COLOPHON <\/a> <\/h2>\n

This page is part of release 5.10 of the Linux man-pages<\/i> project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https:\/\/www.kernel.org\/doc\/man\u2212pages\/.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

address_families \u2212 socket address families (domains) <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[971],"tags":[973,1190,972],"class_list":["post-4111","post","type-post","status-publish","format-standard","hentry","category-7-miscelanea","tag-973","tag-address_families","tag-man7"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=4111"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4111\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=4111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=4111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=4111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}