Tools: hv: Gather ipv[4,6] gateway information
Gather information on the default gateways - ipv4/ipv6.
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>
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index a63e83a..65d54c8 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -491,6 +491,68 @@
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 @@
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: