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authorK. Y. Srinivasan <kys@microsoft.com>2012-09-05 13:50:11 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-10 16:42:32 -0700
commitc050372591bed4488a32e8bf271ae471af5098eb (patch)
treef1f9ec129758fc120e761bae7888042deacb2865 /tools/hv
parent2aea3c712826824dbbbaa7b9c0b70936819304b4 (diff)
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: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/hv')
-rw-r--r--tools/hv/hv_kvp_daemon.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index cfa23a115d18..6fb2c1c6c32e 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).
@@ -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);
}