php - Find the network distance between two IPv4 addresses (not geographic distance) -


given ipv4 address (needle) , unsorted array of ipv4 addresses (haystack), how programmatically determine single address in given haystack closest (network-wise, not geographically) needle?

since don't have access netmask of every address, solution should ignore netmasks , traceroute alike options.

all sorts of addresses used, mean: private, reserved, broadcast, lan , wan.

any in form of theory, pseudo-code, python, php or perl welcome.

the question getting ip address list between 2 ip addresses similar, quite cut it.

i'm still not quite sure you're asking, based on comment

@petergibson closest meant, 192.168.1.101 closer 192.168.56.1 172.30.130.66 . , 192.168.1.254 closer 192.168.1.240 192.168.2.1

you try following python code distance function:

import socket def dist(a, b):     def to_num(addr):         # parse address string integer quads         quads = map(ord, socket.inet_aton(addr))         # spread quads out          return reduce(lambda x,y: x * 0x10000 + y, quads)     return abs(to_num(a) - to_num(b))

the numbers returned arbitrary, should suffice basic needs. i'm still not sure should broadcast addresses etc though.

some examples:

>>> dist('192.168.1.254', '192.168.1.240') 14l >>> dist('192.168.1.254', '192.168.2.1') 65283l >>> dist('192.168.1.101', '192.168.56.1') 3604380l >>> dist('192.168.1.101', '172.30.130.66') 5630092231245859l

Comments

Post a Comment

Popular posts from this blog

How to mention the localhost in android -

i trying call localhost in android application. unfortunately not possible used several methods emulator local host http://10.0.2.2/android/dbconnection.php and network ip address http://192.168.1.xx/android/dbconnection.php also http://localhost:8080/android/dbconnection.php but nothing connected localhost. purpose refer stackoverflow answers not working i facing same problem when worked on localhost. referred stackoverflow answer got solution create new emulator works fine in new emulator.
Read more

php - Calling a template part from a post -

i include iframe within post in wordpress. located inside content of post, meaning cannot in post template file, otherwise either before or after. i'd add facebook plugin within posts: <div id="socialwrap"><div class="fb-like" data-href="http://onlinearizonahomes.info" data-send="true" data-width="450" data-show-faces="true" data-font="arial"></div></div> i thinking of calling template part within post <?php get_template_part( 'social' ); ?> cannot use php within post without plugin (i'd avoid using plugin this). an alternative using javascript create html in post, seems unnecessary use of javascript. what best way add html within wordpress post? you can use shortcode. add functions.php function cudjex_fbshare( $atts, $content = null ) { global $post; $link = get_permalink($post->id); return '<div id="socialwrap...
Read more

c# - String.format() DateTime With Arabic culture -

check below code snippet, namespace testdateconvertion { class program { static void main(string[] args) { datetime testvalue = new datetime(2013, 12, 15, 15, 33, 44); cultureinfo culture = new cultureinfo("ar-sa"); string stringvalue = string.format(culture, "{0:d} {0:hh:mm:ss}", testvalue); console.writeline(stringvalue); console.readline(); } } } it gives output 22/02/35 15:33:44 i not getting how possible. whats 35 doing in output there that's 13/12/2015 in hijri, 35 means 1435 in hijri, default date format saudi arabia.
Read more