From: Youngjae Cho <y0.cho@samsung.com>
Date: Wed, 5 Feb 2020 06:03:04 +0000 (+0900)
Subject: Apply mac addres for rndis mode
X-Git-Tag: submit/tizen_5.5/20200207.085239^0
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a9e04e4da8ec8173b259c9cd0ab213c5cd4f5e8;p=platform%2Fcore%2Fsystem%2Flibdevice-node.git

Apply mac addres for rndis mode

Change-Id: Ic3472d6b6da35b199704ca6150447cab05638a71
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>
(cherry picked from commit afc9e97d20d06918ade6e6cc555226bc30131889)
---

diff --git a/hw/usb_cfs_client_common.c b/hw/usb_cfs_client_common.c
index b67d86d..e4572de 100644
--- a/hw/usb_cfs_client_common.c
+++ b/hw/usb_cfs_client_common.c
@@ -26,6 +26,7 @@
 #include <sys/types.h>
 #include <sys/mount.h>
 #include <usbg/usbg.h>
+#include <usbg/function/net.h>
 #include <unistd.h>
 
 #include <libsyscommon/dbus-systemd.h>
@@ -658,6 +659,37 @@ umount_ffs:
 	return ret;
 }
 
+static int cfs_set_rndis_mac_addr(usbg_gadget *gadget, usbg_function *func)
+{
+	int i, ret;
+	struct ether_addr ethaddr;
+	struct usbg_gadget_strs strs;
+	struct usbg_f_net *nf = usbg_to_net_function(func);
+
+	if (!nf)
+		return -EINVAL;
+
+	ret = usbg_get_gadget_strs(gadget, LANG_US_ENG, &strs);
+	if (ret != USBG_SUCCESS)
+		return ret;
+
+	for (i = 0; i < ETHER_ADDR_LEN; i++)
+		ethaddr.ether_addr_octet[i] = 0;
+
+	for (i = 0; (i < 256) && strs.serial[i]; i++) {
+		ethaddr.ether_addr_octet[i % (ETHER_ADDR_LEN - 1) + 1] ^= strs.serial[i];
+	}
+	ethaddr.ether_addr_octet[0] &= 0xfe;     /* clear multicast bit */
+	ethaddr.ether_addr_octet[0] |= 0x02;     /* set local assignment bit (IEEE802) */
+
+	usbg_free_gadget_strs(&strs);
+
+	/* host_addr changes mac address */
+	ret = usbg_f_net_set_host_addr(nf, &ethaddr);
+
+	return ret;
+}
+
 static int cfs_set_gadget_config(struct cfs_client *cfs_client,
 				    int config_id,
 				    struct usb_configuration *usb_config)
@@ -722,6 +754,12 @@ static int cfs_set_gadget_config(struct cfs_client *cfs_client,
 			if (ret)
 				return ret;
 
+			/* Setting rndis mac address. This should be done at this point,
+			 * since the node host_addr changes to read only after the function
+			 * is added to config. */
+			if (usbg_get_function_type(func) == USBG_F_RNDIS)
+				(void)cfs_set_rndis_mac_addr(cfs_client->gadget, func); /* A random value is used if fails */
+
 			if (usb_func->ffs_service) {
 				ret = cfs_prep_ffs_service(usb_func->name,
 							usb_func->instance,