Warning: This is the manual of the legacy Guile 2.0 series. You may want to read the manual of the current stable series instead.
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This section describes procedures which convert internet addresses between numeric and string formats.
An IPv4 Internet address is a 4-byte value, represented in Guile as an integer in host byte order, so that say “0.0.0.1” is 1, or “1.0.0.0” is 16777216.
Some underlying C functions use network byte order for addresses, Guile converts as necessary so that at the Scheme level its host byte order everywhere.
For a server, this can be used with bind
(see Network Sockets and Communication) to allow connections from any interface on
the machine.
The broadcast address on the local network.
The address of the local host using the loopback device, ie. ‘127.0.0.1’.
This function is deprecated in favor of inet-pton
.
Convert an IPv4 Internet address from printable string (dotted decimal notation) to an integer. E.g.,
(inet-aton "127.0.0.1") ⇒ 2130706433
This function is deprecated in favor of inet-ntop
.
Convert an IPv4 Internet address to a printable (dotted decimal notation) string. E.g.,
(inet-ntoa 2130706433) ⇒ "127.0.0.1"
Return the network number part of the given IPv4 Internet address. E.g.,
(inet-netof 2130706433) ⇒ 127
Return the local-address-with-network part of the given IPv4 Internet address, using the obsolete class A/B/C system. E.g.,
(inet-lnaof 2130706433) ⇒ 1
Make an IPv4 Internet address by combining the network number net with the local-address-within-network number lna. E.g.,
(inet-makeaddr 127 1) ⇒ 2130706433
An IPv6 Internet address is a 16-byte value, represented in Guile as an integer in host byte order, so that say “::1” is 1.
Convert a network address from an integer to a printable string.
family can be AF_INET
or AF_INET6
. E.g.,
(inet-ntop AF_INET 2130706433) ⇒ "127.0.0.1" (inet-ntop AF_INET6 (- (expt 2 128) 1)) ⇒ "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
Convert a string containing a printable network address to an integer
address. family can be AF_INET
or AF_INET6
.
E.g.,
(inet-pton AF_INET "127.0.0.1") ⇒ 2130706433 (inet-pton AF_INET6 "::1") ⇒ 1
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