From 602ac4d7c541eff9bd228bd306886f0db93a363c Mon Sep 17 00:00:00 2001
From: "adam@algroup.co.uk"
 <adam@algroup.co.uk@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Fri, 14 May 2010 11:04:28 +0000
Subject: [PATCH] multiple proxmark device support [Mohamed Elsabagh]

---
 client/proxusb.c | 40 +++++++++++++++++++++++++++++++++++++---
 client/proxusb.h |  5 +++++
 common/usb.c     | 18 +++++++++++++++++-
 3 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/client/proxusb.c b/client/proxusb.c
index 55ce9d68..8eedd2e6 100644
--- a/client/proxusb.c
+++ b/client/proxusb.c
@@ -113,6 +113,8 @@ usb_dev_handle* findProxmark(int verbose, unsigned int *iface)
 {
   struct usb_bus *busses, *bus;
   usb_dev_handle *handle = NULL;
+  struct prox_unit units[50];
+  int iUnit = 0;
 
   usb_find_busses();
   usb_find_devices();
@@ -129,14 +131,46 @@ usb_dev_handle* findProxmark(int verbose, unsigned int *iface)
         handle = usb_open(dev);
         if (!handle) {
           if (verbose)
-            fprintf(stderr, "open failed: %s!\n", usb_strerror());
-          return NULL;
+            fprintf(stderr, "open fabiled: %s!\n", usb_strerror());
+          //return NULL;
+          continue;
         }
         *iface = dev->config[0].interface[0].altsetting[0].bInterfaceNumber;
-        return handle;
+
+        struct prox_unit unit = {handle, {0}};
+        usb_get_string_simple(handle, desc->iSerialNumber, unit.serial_number, sizeof(unit.serial_number));
+        units[iUnit++] = unit;
+
+        //return handle;
       }
+    }
+  }
+
+  if (iUnit > 0) {
+    int iSelection = 0;
 
+    fprintf(stdout, "\nConnected units:\n");
+
+    for (int i = 0; i < iUnit; i++)
+      fprintf(stdout, "\t%d. SN: %s\n", i+1, units[i].serial_number);
+
+    if (iUnit > 1) {
+      while (iSelection < 1 || iSelection > iUnit) {
+        fprintf(stdout, "Which unit do you want to connect to? ");
+        fscanf(stdin, "%d", &iSelection);
+        }
+      }
+    else
+      iSelection = 1;
+    iSelection --;
+
+    for (int i = 0; i < iUnit; i++) {
+      if (iSelection == i) continue;
+      usb_close(units[i].handle);
+      units[i].handle = NULL;
     }
+
+    return units[iSelection].handle;
   }
 
   return NULL;
diff --git a/client/proxusb.h b/client/proxusb.h
index 42e6c75d..5845888a 100644
--- a/client/proxusb.h
+++ b/client/proxusb.h
@@ -26,4 +26,9 @@ struct usb_dev_handle* FindProxmark(int verbose, unsigned int *iface);
 struct usb_dev_handle* OpenProxmark(int verbose);
 void CloseProxmark(void);
 
+struct prox_unit {
+  usb_dev_handle *handle;
+  char serial_number[256];
+};
+
 #endif
diff --git a/common/usb.c b/common/usb.c
index 3de7d369..3f30d97f 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -95,7 +95,7 @@ static const uint8_t DeviceDescriptor[] = {
 	0x01,0x00,		// Device release number (0001)
 	0x01,			// Manufacturer string descriptor index
 	0x02,			// Product string descriptor index
-	0x00,			// Serial Number string descriptor index (None)
+	0x03,			// Serial Number string descriptor index
 	0x01,			// Number of possible configurations (1)
 };
 
@@ -201,10 +201,26 @@ static const uint8_t StringDescriptor2[] = {
 	't', 0x00,
 };
 
+// Serial Number
+// TODO: Pick yours! Don't forget to modify the length, if needed.
+static const uint8_t StringDescriptor3[] = {
+	18,             // Length
+	0x03,           // Type is string
+	'C', 0x00,
+	'h', 0x00,
+	'a', 0x00,
+	'n', 0x00,
+	'g', 0x00,
+	'e', 0x00,
+	'M', 0x00,
+	'e', 0x00,
+};
+
 static const uint8_t * const StringDescriptors[] = {
 	StringDescriptor0,
 	StringDescriptor1,
 	StringDescriptor2,
+	StringDescriptor3,
 };
 
 
-- 
2.39.5