add simtrace2 host libraries
these are copies of files from simtrace2
diff --git a/src/libusb_util.c b/src/libusb_util.c
new file mode 100644
index 0000000..cb435e2
--- /dev/null
+++ b/src/libusb_util.c
@@ -0,0 +1,297 @@
+/* libisb utilities
+ *
+ * (C) 2010-2016 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <libusb.h>
+
+#include "libusb_util.h"
+
+static char path_buf[USB_MAX_PATH_LEN];
+
+static char *get_path(libusb_device *dev)
+{
+#if (defined(LIBUSB_API_VERSION) && LIBUSB_API_VERSION >= 0x01000102) || (defined(LIBUSBX_API_VERSION) && LIBUSBX_API_VERSION >= 0x01000102)
+ uint8_t path[8];
+ int r,j;
+ r = libusb_get_port_numbers(dev, path, sizeof(path));
+ if (r > 0) {
+ sprintf(path_buf,"%d-%d",libusb_get_bus_number(dev),path[0]);
+ for (j = 1; j < r; j++){
+ sprintf(path_buf+strlen(path_buf),".%d",path[j]);
+ };
+ }
+ return path_buf;
+#else
+# warning "libusb too old - building without USB path support!"
+ return NULL;
+#endif
+}
+
+static int match_dev_id(const struct libusb_device_descriptor *desc, const struct dev_id *id)
+{
+ if ((desc->idVendor == id->vendor_id) && (desc->idProduct == id->product_id))
+ return 1;
+ return 0;
+}
+
+
+static int match_dev_ids(const struct libusb_device_descriptor *desc, const struct dev_id *ids)
+{
+ const struct dev_id *id;
+
+ for (id = ids; id->vendor_id || id->product_id; id++) {
+ if (match_dev_id(desc, id))
+ return 1;
+ }
+ return 0;
+}
+
+libusb_device **find_matching_usb_devs(const struct dev_id *dev_ids)
+{
+ libusb_device **list;
+ libusb_device **out = calloc(256, sizeof(libusb_device *));
+ libusb_device **cur = out;
+ unsigned int i;
+ int rc;
+
+ if (!out)
+ return NULL;
+
+ rc = libusb_get_device_list(NULL, &list);
+ if (rc <= 0) {
+ perror("No USB devices found");
+ free(out);
+ return NULL;
+ }
+
+ for (i = 0; list[i] != NULL; i++) {
+ struct libusb_device_descriptor dev_desc;
+ libusb_device *dev = list[i];
+
+ rc = libusb_get_device_descriptor(dev, &dev_desc);
+ if (rc < 0) {
+ perror("Couldn't get device descriptor\n");
+ libusb_unref_device(dev);
+ continue;
+ }
+
+ if (match_dev_ids(&dev_desc, dev_ids)) {
+ *cur = dev;
+ cur++;
+ /* FIXME: overflow check */
+ } else
+ libusb_unref_device(dev);
+ }
+ if (cur == out) {
+ libusb_free_device_list(list, 1);
+ free(out);
+ return NULL;
+ }
+
+ libusb_free_device_list(list, 0);
+ return out;
+}
+
+int dev_find_matching_interfaces(libusb_device *dev, int class, int sub_class, int protocol,
+ struct usb_interface_match *out, unsigned int out_len)
+{
+ struct libusb_device_descriptor dev_desc;
+ int rc, i, out_idx = 0;
+ uint8_t addr;
+ char *path;
+
+ rc = libusb_get_device_descriptor(dev, &dev_desc);
+ if (rc < 0) {
+ perror("Couldn't get device descriptor\n");
+ return -EIO;
+ }
+
+ addr = libusb_get_device_address(dev);
+ path = get_path(dev);
+
+ /* iterate over all configurations */
+ for (i = 0; i < dev_desc.bNumConfigurations; i++) {
+ struct libusb_config_descriptor *conf_desc;
+ int j;
+
+ rc = libusb_get_config_descriptor(dev, i, &conf_desc);
+ if (rc < 0) {
+ fprintf(stderr, "Couldn't get config descriptor %u\n", i);
+ continue;
+ }
+ /* iterate over all interfaces */
+ for (j = 0; j < conf_desc->bNumInterfaces; j++) {
+ const struct libusb_interface *intf = &conf_desc->interface[j];
+ int k;
+ /* iterate over all alternate settings */
+ for (k = 0; k < intf->num_altsetting; k++) {
+ const struct libusb_interface_descriptor *if_desc;
+ if_desc = &intf->altsetting[k];
+ if (class >= 0 && if_desc->bInterfaceClass != class)
+ continue;
+ if (sub_class >= 0 && if_desc->bInterfaceSubClass != sub_class)
+ continue;
+ if (protocol >= 0 && if_desc->bInterfaceProtocol != protocol)
+ continue;
+ /* MATCH! */
+ out[out_idx].usb_dev = dev;
+ out[out_idx].vendor = dev_desc.idVendor;
+ out[out_idx].product = dev_desc.idProduct;
+ out[out_idx].addr = addr;
+ strncpy(out[out_idx].path, path, sizeof(out[out_idx].path));
+ out[out_idx].path[sizeof(out[out_idx].path)-1] = '\0';
+ out[out_idx].configuration = conf_desc->bConfigurationValue;
+ out[out_idx].interface = if_desc->bInterfaceNumber;
+ out[out_idx].altsetting = if_desc->bAlternateSetting;
+ out[out_idx].class = if_desc->bInterfaceClass;
+ out[out_idx].sub_class = if_desc->bInterfaceSubClass;
+ out[out_idx].protocol = if_desc->bInterfaceProtocol;
+ out[out_idx].string_idx = if_desc->iInterface;
+ out_idx++;
+ if (out_idx >= out_len)
+ return out_idx;
+ }
+ }
+ }
+ return out_idx;
+}
+
+int usb_match_interfaces(libusb_context *ctx, const struct dev_id *dev_ids,
+ int class, int sub_class, int protocol,
+ struct usb_interface_match *out, unsigned int out_len)
+{
+ struct usb_interface_match *out_cur = out;
+ unsigned int out_len_remain = out_len;
+ libusb_device **list;
+ libusb_device **dev;
+
+ list = find_matching_usb_devs(dev_ids);
+ if (!list)
+ return 0;
+
+ for (dev = list; *dev; dev++) {
+ int rc;
+
+#if 0
+ struct libusb_device_descriptor dev_desc;
+ uint8_t ports[8];
+ uint8_t addr;
+ rc = libusb_get_device_descriptor(*dev, &dev_desc);
+ if (rc < 0) {
+ perror("Cannot get device descriptor");
+ continue;
+ }
+
+ addr = libusb_get_device_address(*dev);
+
+ rc = libusb_get_port_numbers(*dev, ports, sizeof(ports));
+ if (rc < 0) {
+ perror("Cannot get device path");
+ continue;
+ }
+
+ printf("Found USB Device %04x:%04x at address %d\n",
+ dev_desc.idVendor, dev_desc.idProduct, addr);
+#endif
+
+ rc = dev_find_matching_interfaces(*dev, class, sub_class, protocol, out_cur, out_len_remain);
+ if (rc < 0)
+ continue;
+ out_cur += rc;
+ out_len_remain -= rc;
+
+ }
+ return out_len - out_len_remain;
+}
+
+libusb_device_handle *usb_open_claim_interface(libusb_context *ctx,
+ const struct usb_interface_match *ifm)
+{
+ int rc, config;
+ struct dev_id dev_ids[] = { { ifm->vendor, ifm->product }, { 0, 0 } };
+ libusb_device **list;
+ libusb_device **dev;
+ libusb_device_handle *usb_devh = NULL;
+
+ list = find_matching_usb_devs(dev_ids);
+ if (!list) {
+ perror("No USB device with matching VID/PID");
+ return NULL;
+ }
+
+ for (dev = list; *dev; dev++) {
+ int addr;
+ char *path;
+
+ addr = libusb_get_device_address(*dev);
+ path = get_path(*dev);
+ if ((ifm->addr && addr == ifm->addr) ||
+ (strlen(ifm->path) && !strcmp(path, ifm->path))) {
+ rc = libusb_open(*dev, &usb_devh);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot open device: %s\n", libusb_error_name(rc));
+ usb_devh = NULL;
+ break;
+ }
+ rc = libusb_get_configuration(usb_devh, &config);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot get current configuration: %s\n", libusb_error_name(rc));
+ libusb_close(usb_devh);
+ usb_devh = NULL;
+ break;
+ }
+ if (config != ifm->configuration) {
+ rc = libusb_set_configuration(usb_devh, ifm->configuration);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot set configuration: %s\n", libusb_error_name(rc));
+ libusb_close(usb_devh);
+ usb_devh = NULL;
+ break;
+ }
+ }
+ rc = libusb_claim_interface(usb_devh, ifm->interface);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot claim interface: %s\n", libusb_error_name(rc));
+ libusb_close(usb_devh);
+ usb_devh = NULL;
+ break;
+ }
+ rc = libusb_set_interface_alt_setting(usb_devh, ifm->interface, ifm->altsetting);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot set interface altsetting: %s\n", libusb_error_name(rc));
+ libusb_release_interface(usb_devh, ifm->interface);
+ libusb_close(usb_devh);
+ usb_devh = NULL;
+ break;
+ }
+ }
+ }
+
+ /* unref / free list */
+ for (dev = list; *dev; dev++)
+ libusb_unref_device(*dev);
+ free(list);
+
+ return usb_devh;
+}