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diff --git a/man-pages-posix-2013/man3p/inet_ntop.3p b/man-pages-posix-2013/man3p/inet_ntop.3p new file mode 100644 index 0000000..f1d1adc --- /dev/null +++ b/man-pages-posix-2013/man3p/inet_ntop.3p @@ -0,0 +1,200 @@ +'\" et +.TH INET_NTOP "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual" +.SH PROLOG +This manual page is part of the POSIX Programmer's Manual. +The Linux implementation of this interface may differ (consult +the corresponding Linux manual page for details of Linux behavior), +or the interface may not be implemented on Linux. + +.SH NAME +inet_ntop, +inet_pton +\(em convert IPv4 and IPv6 addresses between binary and text form +.SH SYNOPSIS +.LP +.nf +#include <arpa/inet.h> +.P +const char *inet_ntop(int \fIaf\fP, const void *restrict \fIsrc\fP, + char *restrict \fIdst\fP, socklen_t \fIsize\fP); +int inet_pton(int \fIaf\fP, const char *restrict \fIsrc\fP, void *restrict \fIdst\fP); +.fi +.SH DESCRIPTION +The +\fIinet_ntop\fR() +function shall convert a numeric address into a text string suitable +for presentation. The +.IR af +argument shall specify the family of the address. This can be AF_INET +or AF_INET6. +The +.IR src +argument points to a buffer holding an IPv4 address if the +.IR af +argument is AF_INET, +or an IPv6 address if the +.IR af +argument is AF_INET6; +the address must be in network byte order. The +.IR dst +argument points to a buffer where the function stores the resulting +text string; it shall not be NULL. The +.IR size +argument specifies the size of this buffer, which shall be large enough +to hold the text string (INET_ADDRSTRLEN characters for IPv4, +INET6_ADDRSTRLEN characters for IPv6). +.P +The +\fIinet_pton\fR() +function shall convert an address in its standard text presentation +form into its numeric binary form. The +.IR af +argument shall specify the family of the address. The AF_INET +and AF_INET6 +address families shall be supported. The +.IR src +argument points to the string being passed in. The +.IR dst +argument points to a buffer into which the function stores the numeric +address; this shall be large enough to hold the numeric address (32 bits +for AF_INET, +128 bits for AF_INET6). +.P +If the +.IR af +argument of +\fIinet_pton\fR() +is AF_INET, the +.IR src +string shall be in the standard IPv4 dotted-decimal form: +.sp +.RS 4 +.nf +\fB +ddd.ddd.ddd.ddd +.fi \fR +.P +.RE +.P +where +.BR \(dqddd\(dq +is a one to three digit decimal number between 0 and 255 (see +.IR "\fIinet_addr\fR\^(\|)"). +The +\fIinet_pton\fR() +function does not accept other formats (such as the octal numbers, +hexadecimal numbers, and fewer than four numbers that +\fIinet_addr\fR() +accepts). +.P +If the +.IR af +argument of +\fIinet_pton\fR() +is AF_INET6, the +.IR src +string shall be in one of the following standard IPv6 text forms: +.IP " 1." 4 +The preferred form is +.BR \(dqx:x:x:x:x:x:x:x\(dq , +where the +.BR 'x' s +are the hexadecimal values of the eight 16-bit pieces of the address. +Leading zeros in individual fields can be omitted, but there shall be at +least one numeral in every field. +.IP " 2." 4 +A string of contiguous zero fields in the preferred form can be shown +as +.BR \(dq::\(dq . +The +.BR \(dq::\(dq +can only appear once in an address. Unspecified addresses (\c +.BR \(dq0:0:0:0:0:0:0:0\(dq ) +may be represented simply as +.BR \(dq::\(dq . +.IP " 3." 4 +A third form that is sometimes more convenient when dealing with a +mixed environment of IPv4 and IPv6 nodes is +.BR \(dqx:x:x:x:x:x:d.d.d.d\(dq , +where the +.BR 'x' s +are the hexadecimal values of the six high-order 16-bit pieces of the +address, and the +.BR 'd' s +are the decimal values of the four low-order 8-bit pieces of the +address (standard IPv4 representation). +.TP 10 +.BR Note: +A more extensive description of the standard representations of IPv6 +addresses can be found in RFC\ 2373. +.P +.SH "RETURN VALUE" +The +\fIinet_ntop\fR() +function shall return a pointer to the buffer containing the text +string if the conversion succeeds, and NULL otherwise, and set +.IR errno +to indicate the error. +.P +The +\fIinet_pton\fR() +function shall return 1 if the conversion succeeds, with the address +pointed to by +.IR dst +in network byte order. It shall return 0 if the input is not a valid +IPv4 dotted-decimal string +or a valid IPv6 address string, +or \(mi1 with +.IR errno +set to +.BR [EAFNOSUPPORT] +if the +.IR af +argument is unknown. +.SH ERRORS +The +\fIinet_ntop\fR() +and +\fIinet_pton\fR() +functions shall fail if: +.TP +.BR EAFNOSUPPORT +.br +The +.IR af +argument is invalid. +.TP +.BR ENOSPC +The size of the +\fIinet_ntop\fR() +result buffer is inadequate. +.LP +.IR "The following sections are informative." +.SH "EXAMPLES" +None. +.SH "APPLICATION USAGE" +None. +.SH "RATIONALE" +None. +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +The Base Definitions volume of POSIX.1\(hy2008, +.IR "\fB<arpa_inet.h>\fP" +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 7, Copyright (C) 2013 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. +(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.unix.org/online.html . + +Any typographical or formatting errors that appear +in this page are most likely +to have been introduced during the conversion of the source files to +man page format. To report such errors, see +https://www.kernel.org/doc/man-pages/reporting_bugs.html . |