Collect information on dhcp setting for the specified interface.
We invoke an exyernal script to get this information.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 tools/hv/hv_kvp_daemon.c |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index a81ce67..c510283 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c

@@ -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).

@@ -580,6 +583,36 @@ 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.
+        */
+
+       memset(cmd, 0, 512);