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Full Discussion: ip address octet increments
Top Forums Programming ip address octet increments Post 302111785 by Naanu on Thursday 22nd of March 2007 05:32:27 PM
Old 03-22-2007
jim...nope doesnt work...
works for the last octet though ...and is not linear after that.
thanks anyway. wills stick with my old method.

Quote:
Originally Posted by jim mcnamara
Try it and see - I've never used it that way. I believe the code works modulo 255 as you seem to indicate.

If you are shooting at enumerating the various ip addresses in your local network, there are more efficient ways than guessing ip's.
 

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socket_from_name(3ncs)													    socket_from_name(3ncs)

Name
       socket_from_name - convert a name and port number to a socket address

Syntax
       #include <idl/c/socket.h>

       void socket_$from_name(family, name, nlength, port, sockaddr, slength,				status)
       unsigned long family;
       socket_$string_t name;
       unsigned long nlength;
       unsigned long port;
       socket_$addr_t *sockaddr;
       unsigned long *slength;
       status_$t *status;

Arguments
       family The  integer  representation  of	an  address  family.   Value  can be socket_$internet or socket_$unspec If the family parameter is
	      socket_$unspec, then the name parameter is scanned for a prefix of family: (for example, ip:).

       name   A string in the format family:host[port], where family:, host, and [port] are all optional.  The family is an address  family.   The
	      only  valid  family  is  ip.   If  you specify a family as part of the name parameter, you must specify socket_$unspec in the family
	      parameter.  The host is a host name.  A leading number sign (#) can be used to indicate that  the  host  name  is  in  the  standard
	      numeric  form (for example, #192.9.8.7).	If host is omitted, the local host name is used.  The port is a port number.  If you spec-
	      ify a port as part of the name parameter, the port parameter is ignored.

       nlength
	      The length, in bytes, of name.

       port   A port number.  If you specify a port number in the name parameter, this parameter is ignored.

       sockaddr
	      A socket address.

       slength
	      The length, in bytes, of sockaddr.

       status The completion status. If the completion status returned in is equal to status_$ok , then the routine that supplied it was  success-
	      ful.

Description
       The  routine converts a textual address family, host name, and port number to a socket address.	The address family and the port number can
       be either specified as separate parameters or included in the name parameter.

Files
See Also
       intro(3ncs), socket_family_from_name(3ncs), socket_to_name(3ncs)

															    socket_from_name(3ncs)
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