DM USB: xHCI: Fix banned API issue.

In USB mediator, sscanf, strtok and atoi API is banned, so replace them
with permitted API function.

Tracked-On: #1254
Signed-off-by: Yang Liang <liang3.yang@intel.com>
Reviewed-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Reviewed-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>

devicemodel/hw/pci/xhci.c

@@ -92,6 +92,7 @@
 #include "xhci.h"
 #include "usb_pmapper.h"
 #include "vmmapi.h"
+#include "dm_string.h"
 
 #undef LOG_TAG
 #define LOG_TAG			"xHCI: "
@@ -3704,18 +3705,24 @@ pci_xhci_parse_log_level(struct pci_xhci_vdev *xdev, char *opts)
 static int
 pci_xhci_parse_bus_port(struct pci_xhci_vdev *xdev, char *opts)
 {
-	int rc = 0, cnt;
-	uint32_t port, bus, index;
+	int rc = 0;
+	char *tstr;
+	int port, bus, index;
 	struct usb_devpath path;
 	struct usb_native_devinfo di;
 
 	assert(xdev);
 	assert(opts);
 
+	tstr = opts;
 	/* 'bus-port' format */
-	cnt = sscanf(opts, "%u-%u", &bus, &port);
-	if (cnt == EOF || cnt < 2 || bus >= USB_NATIVE_NUM_BUS ||
-			port >= USB_NATIVE_NUM_PORT) {
+	if (!tstr || dm_strtoi(tstr, &tstr, 10, &bus) || *tstr != '-' ||
+			dm_strtoi(tstr + 1, &tstr, 10, &port)) {
+		rc = -1;
+		goto errout;
+	}
+
+	if (bus >= USB_NATIVE_NUM_BUS || port >= USB_NATIVE_NUM_PORT) {
 		rc = -1;
 		goto errout;
 	}
@@ -3873,7 +3880,7 @@ pci_xhci_parse_extcap(struct pci_xhci_vdev *xdev, char *opts)
 static int
 pci_xhci_parse_opts(struct pci_xhci_vdev *xdev, char *opts)
 {
-	char *s, *t, *n;
+	char *s, *t, *n, *tptr;
 	int i, rc = 0;
 	struct pci_xhci_option_elem *elem;
 	int (*f)(struct pci_xhci_vdev *, char *);
@@ -3900,7 +3907,7 @@ pci_xhci_parse_opts(struct pci_xhci_vdev *xdev, char *opts)
 	elem = xhci_option_table;
 	elem_cnt = sizeof(xhci_option_table) / sizeof(*elem);
 
-	for (t = strtok(s, ",:"); t; t = strtok(NULL, ",:")) {
+	for (t = strtok_r(s, ",:", &tptr); t; t = strtok_r(NULL, ",:", &tptr)) {
 		if (isdigit(t[0])) { /* bus-port */
 			if (pci_xhci_parse_bus_port(xdev, t)) {
 				rc = -3;

devicemodel/hw/usb_core.c

@@ -82,6 +82,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include "usb_core.h"
+#include "dm_string.h"
 
 SET_DECLARE(usb_emu_set, struct usb_devemu);
 int usb_log_level;
@@ -205,7 +206,13 @@ usb_native_is_port_existed(uint8_t bus_num, uint8_t port_num)
 		return 0;
 	}
 
-	native_port_cnt = atoi(cnt);
+	rc = dm_strtoi(cnt, (char **)&cnt, 10, &native_port_cnt);
+	if (rc) {
+		UPRINTF(LWRN, "fail to get maxchild number\r\n");
+		close(fd);
+		return 0;
+	}
+
 	if (port_num > native_port_cnt || port_num < 0) {
 		UPRINTF(LWRN, "invalid port_num %d, max port count %d\r\n",
 				port_num, native_port_cnt);
@@ -269,6 +276,7 @@ int
 usb_get_hub_port_num(struct usb_devpath *path)
 {
 	int rc, fd;
+	int icnt;
 	char buf[128];
 	char cnt[8];
 
@@ -296,5 +304,12 @@ usb_get_hub_port_num(struct usb_devpath *path)
 	}
 
 	close(fd);
-	return atoi(cnt);
+
+	rc = dm_strtoi(cnt, (char **)&cnt, 10, &icnt);
+	if (rc) {
+		UPRINTF(LWRN, "fail to get maxchild\r\n");
+		return -1;
+	}
+
+	return icnt;
 }