Commit 4a52c4af authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Tools: hv: Gather ipv[4,6] gateway information 



Gather information on the default gateways - ipv4/ipv6.

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 6a60a6a8

tools/hv/hv_kvp_daemon.c

+68 −0
Original line number Diff line number Diff line
@@ -491,6 +491,68 @@ void kvp_get_os_info(void) 
	return;

}



static void kvp_process_ipconfig_file(char *cmd,

					char *config_buf, int len,

					int element_size, int offset)

{

	char buf[256];

	char *p;

	char *x;

	FILE *file;



	/*

	 * First execute the command.

	 */

	file = popen(cmd, "r");

	if (file == NULL)

		return;



	if (offset == 0)

		memset(config_buf, 0, len);

	while ((p = fgets(buf, sizeof(buf), file)) != NULL) {

		if ((len - strlen(config_buf)) < (element_size + 1))

			break;



		x = strchr(p, '\n');

		*x = '\0';

		strcat(config_buf, p);

		strcat(config_buf, ";");

	}

	pclose(file);

}



static void kvp_get_ipconfig_info(char *if_name,

				 struct hv_kvp_ipaddr_value *buffer)

{

	char cmd[512];



	/*

	 * Get the address of default gateway (ipv4).

	 */

	sprintf(cmd, "%s %s", "ip route show dev", if_name);

	strcat(cmd, " | awk '/default/ {print $3 }'");



	/*

	 * Execute the command to gather gateway info.

	 */

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

				(MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);



	/*

	 * Get the address of default gateway (ipv6).

	 */

	sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);

	strcat(cmd, " | awk '/default/ {print $3 }'");



	/*

	 * Execute the command to gather gateway info (ipv6).

	 */

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

				(MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);



}





static unsigned int hweight32(unsigned int *w)

{

	unsigned int res = *w - ((*w >> 1) & 0x55555555);
@@ -650,6 +712,12 @@ kvp_get_ip_address(int family, char *if_name, int op, 
				strcat((char *)ip_buffer->sub_net, ";");

				sn_offset += strlen(sn_str) + 1;

			}



			/*

			 * Collect other ip related configuration info.

			 */



			kvp_get_ipconfig_info(if_name, ip_buffer);

		}



gather_ipaddr: