Edit report at http://bugs.php.net/bug.php?id=40674&edit=1
ID: 40674
Comment by: agv at rsh dot hu
Reported by: matth at mystictrd dot com
Summary: socket_bind on interface wont see broadcasts to
255.255.255.255
Status: No Feedback
Type: Bug
Package: Sockets related
Operating System: Debian 3.1
PHP Version: 5.2.1
New Comment:
Hy! I solved the problem:
<?php
$bc_socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); // for
broadcast packets
$if_socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); // for answer
packets
socket_bind($bc_socket, "255.255.255.255", 67); // listen to discover
pcks.
socket_bind($if_socket, "10.0.0.1", 67); // target interface address
socket_set_option($bc_socket, SOL_SOCKET, SO_BROADCAST, 1);
socket_set_option($bc_socket, SOL_SOCKET, SO_REUSEADDR, 1);
socket_set_option($bc_socket, SOL_SOCKET, SO_DEBUG, 0);
socket_set_option($if_socket, SOL_SOCKET, SO_BROADCAST, 1);
socket_set_option($if_socket, SOL_SOCKET, SO_REUSEADDR, 1);
socket_set_option($if_socket, SOL_SOCKET, SO_DEBUG, 0);
while(1)
{
if($src = @socket_recv($bc_socket, $data, 9999, 0))
{
echo "data!\n";
$senddata = "....";
socket_sendto($if_socket, $senddata, strlen($senddata),0,
"255.255.255.255", 68);
}
}
?>
Previous Comments:
------------------------------------------------------------------------
[2007-09-06 01:00:01] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
------------------------------------------------------------------------
[2007-08-29 11:55:31] [email protected]
"A non-authoritative server simply ignores the request, leading to an
implementation dependent time out for the client to give up on the
request and ask for a new IP."
Isn't that exactly what is happening here?
------------------------------------------------------------------------
[2007-03-06 17:12:03] matth at mystictrd dot com
My first message had a working example but here it is again with more
information.
The purpose is to see DHCP requests from a DHCP Client. So use a DHCP
Client to get an IP address on a system thats on the same network that
this script is running on.
This first example WON'T see the packets:
<?php
$ip = "ENTER YOUR IP ADDRESS HERE"; //example: 192.168.0.100
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_bind($socket, $ip, 67);
while(1)
{
if($src = @socket_recv($socket, $data, 9999, 0)) { echo "data!\n"; }
}
?>
This second example WILL see the packets:
<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_bind($socket, 0, 67);
while(1)
{
if($src = @socket_recv($socket, $data, 9999, 0)) { echo "data!\n"; }
}
?>
This reference might give you a better idea of what I'm talking about:
http://en.wikipedia.org/wiki/Dhcp#DHCP_discovery
------------------------------------------------------------------------
[2007-03-02 20:24:54] matth at mystictrd dot com
The way it seems this should work (I easily could be completely off
base) is:
socket_bind could be defined as:
bool socket_bind ( resource $socket, string $address [, int $port [,
string $mac or $iface ]] )
------------------------------------------------------------------------
[2007-03-02 17:21:23] matth at mystictrd dot com
I believe in C/C++ you can specify hardware addresses to listen on -
specifically either a MAC address/an interface name (eth0 in linux).
After doing some tests in C it seems that if you listen on an ip (i.e.
192.168.0.1) and you will not see that type of packet but if you listen
on 0.0.0.0 or INADDR_ANY you can see it.
------------------------------------------------------------------------
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