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Commit c0503725 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Tools: hv: Gather DHCP information 



Collect information on dhcp setting for the specified interface.
We invoke an external (Distro specific)  script to get this information.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2aea3c71

tools/hv/hv_kvp_daemon.c

+31 −0
Original line number Diff line number Diff line
@@ -524,6 +524,9 @@ static void kvp_get_ipconfig_info(char *if_name, 
				 struct hv_kvp_ipaddr_value *buffer)

{

	char cmd[512];

	char dhcp_info[128];

	char *p;

	FILE *file;



	/*

	 * Get the address of default gateway (ipv4).
@@ -572,6 +575,34 @@ static void kvp_get_ipconfig_info(char *if_name, 
	 */

	kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,

				(MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);



	/*

	 * Gather the DHCP state.

	 * We will gather this state by invoking an external script.

	 * The parameter to the script is the interface name.

	 * Here is the expected output:

	 *

	 * Enabled: DHCP enabled.

	 */



	sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);



	file = popen(cmd, "r");

	if (file == NULL)

		return;



	p = fgets(dhcp_info, sizeof(dhcp_info), file);

	if (p == NULL) {

		pclose(file);

		return;

	}



	if (!strncmp(p, "Enabled", 7))

		buffer->dhcp_enabled = 1;

	else

		buffer->dhcp_enabled = 0;



	pclose(file);

}