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How to get the host’s IP address from within VuGen

September 9th, 2009 Posted by Paul Richards 2 Comments »

Sometimes an application running on a client (even a web broswer) will send the IP address of the client machine to the server at the Application layer, rather than the Network layer. This is surprisingly common with web-based apps designed to run on a company’s intranet.

To make a BPM script accurately mimic a real user, the script should also send back the real IP address of the machine it is running from.

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Action()
{
	char * vuserIpStr;
 
	web_set_sockets_option("IP_ADDRESS_BY_INDEX",  "1"); // Note that this forces the BPM to use the first NIC. This may cause confusion if the BPM has multiple NICs.
	vuserIpStr = (char *) lr_get_vuser_ip(); // If the IP was set with the web_set_sockets_option function using the IP_ADDRESS_BY_INDEX option, lr_get_vuser_ip returns that IP. 
 
	if ( (vuserIpStr == NULL) || (strcmp(vuserIpStr,"") == 0) ) {
		lr_error_message("!!ERROR!!::Cannot get IP address for Virtual User.");
		lr_abort();
	} else {
		lr_output_message("NOTE::My Vuser IP address = [%s]", vuserIpStr);
	}
 
	return 0;
}

 

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2 Responses to “How to get the host’s IP address from within VuGen”

  1. Daniel Says:
    September 13th, 2009 at 1:20 pm

    An alternative would be to use the following code:

    Action()
{
	int rc;
	char *peer;

	rc = lrs_create_socket("socket1", "TCP", "LocalHost=:8888", LrsLastArg); 

	peer = lrs_get_socket_attrib("socket1", LOCAL_ADDRESS );

	lr_output_message("ip is %s", peer);

	return 0;
}
  2. Stuart Moncrieff Says:
    September 13th, 2009 at 4:26 pm

    I have vague memories of playing with the Windows GetIpAddrTable() function, which can be found in Iphlpapi.dll.

    Cheers,
    Stu.

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