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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>
This commit is contained in:
K. Y. Srinivasan 2012-09-05 13:50:11 -07:00 committed by Greg Kroah-Hartman
parent 2aea3c7128
commit c050372591
1 changed files with 31 additions and 0 deletions
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31
tools/hv/hv_kvp_daemon.c
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@ -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);
}