table of contents
IPX(3) | Library Functions Manual | IPX(3) |
NAME¶
ipx_addr, ipx_ntoa — IPX address conversion routinesLIBRARY¶
IPX Address Conversion Support Library (libipx, -lipx)SYNOPSIS¶
#include <sys/types.h>#include <netipx/ipx.h> struct ipx_addr
ipx_addr(const char *cp); char *
ipx_ntoa(struct ipx_addr ipx);
DESCRIPTION¶
The routine ipx_addr() interprets character strings representing IPX addresses, returning binary information suitable for use in system calls. The routine ipx_ntoa() takes IPX addresses and returns ASCII strings representing the address in a notation in common use:<network number>.<host
number>.<port number>
Trailing zero fields are suppressed, and each number is printed in hexadecimal,
in a format suitable for input to ipx_addr(). Any fields
lacking super-decimal digits will have a trailing
‘H
’ appended.
An effort has been made to ensure that ipx_addr() be
compatible with most formats in common use. It will first separate an address
into 1 to 3 fields using a single delimiter chosen from period
‘.
’, colon
‘:
’ or pound-sign
‘#
’. Each field is then examined for byte
separators (colon or period). If there are byte separators, each subfield
separated is taken to be a small hexadecimal number, and the entirety is taken
as a network-byte-ordered quantity to be zero extended in the
high-network-order bytes. Next, the field is inspected for hyphens, in which
case the field is assumed to be a number in decimal notation with hyphens
separating the millennia. Next, the field is assumed to be a number: It is
interpreted as hexadecimal if there is a leading
‘0x
’ (as in C), a trailing
‘H
’ (as in Mesa), or there are any
super-decimal digits present. It is interpreted as octal if there is a leading
‘0
’ and there are no super-octal digits.
Otherwise, it is converted as a decimal number.
RETURN VALUES¶
None. (See BUGS.)SEE ALSO¶
hosts(5), networks(5)HISTORY¶
The precursor ns_addr() and ns_toa() functions appeared in 4.3BSD.BUGS¶
The string returned by ipx_ntoa() resides in a static memory area. The function ipx_addr() should diagnose improperly formed input, and there should be an unambiguous way to recognize this.June 4, 1993 | Debian |