View Source net (kernel v9.3)
Network interface.
This module provides an API for the network interface.
Summary
Types
This type defines all addresses (and flags) associated with the interface.
all - All interfaces
For each ifaddrs entry, return either true to keep the entry or false to
discard the entry.
The family field can only have the (above) specified values (and not all the
values of socket:domain()).
Functions
Equivalent to getaddrinfo/2
Network address and service translation.
Returns the name of the current host.
Equivalent to getifaddrs/2
Equivalent to getifaddrs/2
Get interface addresses.
Equivalent to getnameinfo/2
Address-to-name translation in a protocol-independant manner.
Mappings between network interface index and names.
Mappings between network interface names and indexes.
Get network interface names and indexes.
Types
-type address_info() :: #{family := socket:domain(), socktype := socket:type(), protocol := socket:protocol(), address := socket:sockaddr()}.
-type ifaddrs() :: #{name := string(), flags := ifaddrs_flags(), addr => socket:sockaddr(), netmask => socket:sockaddr(), broadaddr => socket:sockaddr(), dstaddr => socket:sockaddr()}.
This type defines all addresses (and flags) associated with the interface.
Note
Not all fields of this map has to be present. The flags field can be used to test for some of the fields. For example
broadaddrwill only be present if thebroadcastflag is present in flags.
-type ifaddrs_filter() :: all | default | inet | inet6 | packet | ifaddrs_filter_map() | ifaddrs_filter_fun().
all - All interfaces
default - Interfaces with address family
inetandinet6inet | inet6 | packet - Interfaces with only the specified address family
For each ifaddrs entry, return either true to keep the entry or false to
discard the entry.
For example, to get an interface list which only contains non-loopback inet
interfaces:
net:getifaddrs(fun(#{addr := #{family := inet},
flags := Flags}) ->
not lists:member(loopback, Flags);
(_) ->
false
end).-type ifaddrs_filter_map() :: #{family := default | local | inet | inet6 | packet | all, flags := any | [ifaddrs_flag()]}.
The family field can only have the (above) specified values (and not all the
values of socket:domain()).
The use of the flags field is that any flag provided must exist for the
interface.
For example, if family is set to inet and flags to
[broadcast, multicast] only interfaces with address family inet and the
flags broadcast and multicast will be listed.
-type ifaddrs_flag() ::
up | broadcast | debug | loopback | pointopoint | notrailers | running | noarp | promisc |
master | slave | multicast | portsel | automedia | dynamic.
-type ifaddrs_flags() :: [ifaddrs_flag()].
-type name_info_flag() :: namereqd | dgram | nofqdn | numerichost | numericserv.
-type name_info_flag_ext() :: idn.
-type name_info_flags() :: [name_info_flag() | name_info_flag_ext()].
-type network_interface_index() :: non_neg_integer().
-type network_interface_name() :: string().
Functions
-spec getaddrinfo(Host) -> {ok, Info} | {error, Reason} when Host :: string(), Info :: [address_info()], Reason :: term().
Equivalent to getaddrinfo/2
-spec getaddrinfo(Host, undefined) -> {ok, Info} | {error, Reason} when Host :: string(), Info :: [address_info()], Reason :: term(); (undefined, Service) -> {ok, Info} | {error, Reason} when Service :: string(), Info :: [address_info()], Reason :: term(); (Host, Service) -> {ok, Info} | {error, Reason} when Host :: string(), Service :: string(), Info :: [address_info()], Reason :: term().
Network address and service translation.
This function is the inverse of getnameinfo. It converts
host and service to a corresponding socket address.
One of the Host and Service may be undefined but not both.
-spec gethostname() -> {ok, HostName} | {error, Reason} when HostName :: string(), Reason :: term().
Returns the name of the current host.
-spec getifaddrs() -> {ok, IfAddrs} | {error, Reason} when IfAddrs :: [ifaddrs()], Reason :: term().
Equivalent to getifaddrs/2
-spec getifaddrs(Filter) -> {ok, IfAddrs} | {error, Reason} when Filter :: ifaddrs_filter(), IfAddrs :: [ifaddrs()], Reason :: term(); (Namespace) -> {ok, IfAddrs} | {error, Reason} when Namespace :: file:filename_all(), IfAddrs :: [ifaddrs()], Reason :: term().
Equivalent to getifaddrs/2
-spec getifaddrs(Filter, Namespace) -> {ok, IfAddrs} | {error, Reason} when Filter :: ifaddrs_filter(), Namespace :: file:filename_all(), IfAddrs :: [ifaddrs()], Reason :: term().
Get interface addresses.
This function is used to get the machines interface addresses, possibly filtered
according to Filter.
By default, a filter with the content: #{family => default, flags => any} is
used. This will return all interfaces with addresses in the inet and inet6
families.
-spec getnameinfo(SockAddr) -> {ok, Info} | {error, Reason} when SockAddr :: socket:sockaddr(), Info :: name_info(), Reason :: term().
Equivalent to getnameinfo/2
-spec getnameinfo(SockAddr, Flags) -> {ok, Info} | {error, Reason} when SockAddr :: socket:sockaddr(), Flags :: name_info_flags() | undefined, Info :: name_info(), Reason :: term().
Address-to-name translation in a protocol-independant manner.
This function is the inverse of getaddrinfo. It converts a
socket address to a corresponding host and service.
-spec if_index2name(Idx) -> {ok, Name} | {error, Reason} when Idx :: network_interface_index(), Name :: network_interface_name(), Reason :: term().
Mappings between network interface index and names.
-spec if_name2index(Name) -> {ok, Idx} | {error, Reason} when Name :: network_interface_name(), Idx :: network_interface_index(), Reason :: term().
Mappings between network interface names and indexes.
-spec if_names() -> {ok, Names} | {error, Reason} when Names :: [{Idx, If}], Idx :: network_interface_index(), If :: network_interface_name(), Reason :: term().
Get network interface names and indexes.