sys: add uuid module for central ID/addr generation

drivers/Makefile.dep

@@ -8,6 +8,7 @@ endif
 ifneq (,$(filter at86rf2%,$(USEMODULE)))
   USEMODULE += at86rf2xx
   USEMODULE += xtimer
+  USEMODULE += uuid
   USEMODULE += netif
   USEMODULE += ieee802154
   USEMODULE += netdev2_ieee802154
@@ -30,6 +31,7 @@ endif
 
 ifneq (,$(filter cc110x,$(USEMODULE)))
   USEMODULE += ieee802154
+  USEMODULE += uuid
   ifneq (,$(filter gnrc_netdev_default,$(USEMODULE)))
     USEMODULE += gnrc_cc110x
 	# XXX: this can be modelled as a dependency for gnrc_netdev_default as soon
@@ -40,6 +42,7 @@ endif
 
 ifneq (,$(filter cc2420,$(USEMODULE)))
   USEMODULE += xtimer
+  USEMODULE += uuid
   USEMODULE += netif
   USEMODULE += ieee802154
   USEMODULE += netdev2_ieee802154
@@ -60,6 +63,7 @@ endif
 ifneq (,$(filter enc28j60,$(USEMODULE)))
   USEMODULE += netdev2_eth
   USEMODULE += xtimer
+  USEMODULE += uuid
 endif
 
 ifneq (,$(filter encx24j600,$(USEMODULE)))
@@ -152,6 +156,7 @@ endif
 
 ifneq (,$(filter w5100,$(USEMODULE)))
   USEMODULE += netdev2_eth
+  USEMODULE += uuid
 endif
 
 ifneq (,$(filter xbee,$(USEMODULE)))

drivers/at86rf2xx/at86rf2xx.c

@@ -23,7 +23,8 @@
  * @}
  */
 
-#include "periph/cpuid.h"
+
+#include "uuid.h"
 #include "byteorder.h"
 #include "net/ieee802154.h"
 #include "net/gnrc.h"
@@ -51,15 +52,7 @@ void at86rf2xx_setup(at86rf2xx_t *dev, const at86rf2xx_params_t *params)
 
 void at86rf2xx_reset(at86rf2xx_t *dev)
 {
-#if CPUID_LEN
-/* make sure that the buffer is always big enough to store a 64bit value */
-#   if CPUID_LEN < IEEE802154_LONG_ADDRESS_LEN
-    uint8_t cpuid[IEEE802154_LONG_ADDRESS_LEN];
-#   else
-    uint8_t cpuid[CPUID_LEN];
-#endif
     eui64_t addr_long;
-#endif
 
     at86rf2xx_hardware_reset(dev);
 
@@ -69,30 +62,16 @@ void at86rf2xx_reset(at86rf2xx_t *dev)
     /* reset options and sequence number */
     dev->netdev.seq = 0;
     dev->netdev.flags = 0;
-    /* set short and long address */
-#if CPUID_LEN
-    /* in case CPUID_LEN < 8, fill missing bytes with zeros */
-    memset(cpuid, 0, CPUID_LEN);
-
-    cpuid_get(cpuid);
-
-#if CPUID_LEN > IEEE802154_LONG_ADDRESS_LEN
-    for (unsigned int i = IEEE802154_LONG_ADDRESS_LEN; i < CPUID_LEN; i++) {
-        cpuid[i & 0x07] ^= cpuid[i];
-    }
-#endif
 
+    /* get an 8-byte unique ID to use as hardware address */
+    uuid_get(addr_long.uint8, IEEE802154_LONG_ADDRESS_LEN);
     /* make sure we mark the address as non-multicast and not globally unique */
-    cpuid[0] &= ~(0x01);
-    cpuid[0] |= 0x02;
-    /* copy and set long address */
-    memcpy(&addr_long, cpuid, IEEE802154_LONG_ADDRESS_LEN);
+    addr_long.uint8[0] &= ~(0x01);
+    addr_long.uint8[0] |=  (0x02);
+    /* set short and long address */
     at86rf2xx_set_addr_long(dev, NTOHLL(addr_long.uint64.u64));
     at86rf2xx_set_addr_short(dev, NTOHS(addr_long.uint16[0].u16));
-#else
-    at86rf2xx_set_addr_long(dev, AT86RF2XX_DEFAULT_ADDR_LONG);
-    at86rf2xx_set_addr_short(dev, AT86RF2XX_DEFAULT_ADDR_SHORT);
-#endif
+
     /* set default PAN id */
     at86rf2xx_set_pan(dev, AT86RF2XX_DEFAULT_PANID);
     /* set default channel */

drivers/cc110x/cc110x-netdev2.c

@@ -29,7 +29,6 @@
 #include "cc110x-interface.h"
 #include "net/eui64.h"
 
-#include "periph/cpuid.h"
 #include "periph/gpio.h"
 #include "net/netdev2.h"
 #include "net/gnrc/nettype.h"

drivers/cc110x/cc110x.c

@@ -20,8 +20,8 @@
  * @}
  */
 
+#include "uuid.h"
 #include "board.h"
-#include "periph/cpuid.h"
 #include "periph/gpio.h"
 #include "periph/spi.h"
 #include "xtimer.h"
@@ -87,14 +87,9 @@ int cc110x_setup(cc110x_t *dev, const cc110x_params_t *params)
     cc110x_set_channel(dev, CC110X_DEFAULT_CHANNEL);
 
     /* set default node id */
-#if CPUID_LEN
-    char cpuid[CPUID_LEN];
-    cpuid_get(cpuid);
-    for (int i = 1; i < CPUID_LEN; i++) {
-        cpuid[0] ^= cpuid[i];
-    }
-    cc110x_set_address(dev, (uint8_t) cpuid[0]);
-#endif
+    uint8_t addr;
+    uuid_get(&addr, 1);
+    cc110x_set_address(dev, addr);
 
     LOG_INFO("cc110x: initialized with address=%u and channel=%i\n",
             (unsigned)dev->radio_address,

drivers/cc2420/cc2420.c

@@ -20,7 +20,7 @@
  * @}
  */
 
-#include "periph/cpuid.h"
+#include "uuid.h"
 #include "byteorder.h"
 #include "net/ieee802154.h"
 #include "net/gnrc.h"
@@ -32,36 +32,6 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-/**
- * @todo    Move this function to a global module
- */
-#if CPUID_ID_LEN
-static void addr_from_cpuid(uint8_t *addr)
-{
-    /* option 1: generate addresses from CPUID */
-    uint8_t cpuid[CPUID_ID_LEN];
-
-    cpuid_get(cpuid);
-    memcpy(addr, cpuid, 8);
-
-#if CPUID_ID_LEN < 8
-    /* in case CPUID_ID_LEN < 8, fill missing bytes with zeros */
-    for (int i = CPUID_ID_LEN; i < 8; i++) {
-        addr_long[i] = 0;
-    }
-#else
-    /* in case CPUID_ID_LEN > 8, XOR those bytes on top of the first 8 */
-    for (int i = 8; i < CPUID_ID_LEN; i++) {
-        addr_long[i & 0x07] ^= cpuid[i];
-    }
-#endif
-
-    /* make sure we mark the address as non-multicast and not globally unique */
-    addr_long[0] &= ~(0x01);
-    addr_long[0] |= 0x02;
-}
-#endif
-
 
 void cc2420_setup(cc2420_t * dev, const cc2420_params_t *params)
 {
@@ -78,16 +48,17 @@ void cc2420_setup(cc2420_t * dev, const cc2420_params_t *params)
 int cc2420_init(cc2420_t *dev)
 {
     uint16_t reg;
-    uint8_t addr[8] = CC2420_ADDR_FALLBACK;
+    uint8_t addr[8];
 
     /* reset options and sequence number */
     dev->netdev.seq = 0;
     dev->netdev.flags = 0;
 
     /* set default address, channel, PAN ID, and TX power */
-#if CPUID_ID_LEN
-    addr_from_cpuid(addr);
-#endif
+    uuid_get(addr, sizeof(addr));
+    /* make sure we mark the address as non-multicast and not globally unique */
+    addr[0] &= ~(0x01);
+    addr[0] |= 0x02;
     cc2420_set_addr_short(dev, &addr[6]);
     cc2420_set_addr_long(dev, addr);
     cc2420_set_pan(dev, CC2420_PANID_DEFAULT);

drivers/cc2420/cc2420_getset.c

@@ -21,6 +21,7 @@
  */
 
 #include <string.h>
+#include <errno.h>
 
 #include "cc2420.h"
 #include "cc2420_internal.h"

drivers/enc28j60/enc28j60.c

@@ -21,6 +21,7 @@
 #include <errno.h>
 #include <string.h>
 
+#include "uuid.h"
 #include "mutex.h"
 #include "xtimer.h"
 #include "assert.h"
@@ -30,10 +31,6 @@
 #include "enc28j60.h"
 #include "enc28j60_regs.h"
 
-#if CPUID_LEN
-#include "periph/cpuid.h"
-#endif
-
 #define ENABLE_DEBUG    (0)
 #include "debug.h"
 
@@ -269,7 +266,7 @@ static int nd_recv(netdev2_t *netdev, void *buf, size_t max_len, void *info)
     if (buf != NULL) {
 #ifdef MODULE_NETSTATS_L2
         netdev->stats.rx_count++;
-        netdev2->stats.rx_bytes += size;
+        netdev->stats.rx_bytes += size;
 #endif
         /* read packet content into the supplied buffer */
         if (size <= max_len) {
@@ -354,14 +351,10 @@ static int nd_init(netdev2_t *netdev)
     /* set non-back-to-back inter packet gap -> 0x12 is default */
     cmd_wcr(dev, REG_B2_MAIPGL, 2, MAIPGL_FD);
     /* set default MAC address */
-#if CPUID_LEN
-    uint8_t macbuf[CPUID_LEN];
-    cpuid_get(&macbuf);     /* we get the full ID but use only parts of it */
+    uint8_t macbuf[ETHERNET_ADDR_LEN];
+    uuid_get(macbuf, ETHERNET_ADDR_LEN);
     macbuf[0] |= 0x02;      /* locally administered address */
     macbuf[0] &= ~0x01;     /* unicast address */
-#else
-    uint8_t macbuf[] = ENC28J60_FALLBACK_MAC;
-#endif
     mac_set(dev, macbuf);
 
     /* PHY configuration */

drivers/include/at86rf2xx.h

@@ -48,14 +48,6 @@ extern "C" {
  */
 #define AT86RF2XX_MAX_PKT_LENGTH        (IEEE802154_FRAME_LEN_MAX)
 
-/**
- * @brief   Default addresses used if the CPUID module is not present
- * @{
- */
-#define AT86RF2XX_DEFAULT_ADDR_SHORT    (0x0230)
-#define AT86RF2XX_DEFAULT_ADDR_LONG     (0x1222334455667788)
-/** @} */
-
 /**
  * @brief   Channel configuration
  * @{

drivers/include/cc2420.h

@@ -38,14 +38,6 @@ extern "C" {
  */
 #define CC2420_PKT_MAXLEN       (IEEE802154_FRAME_LEN_MAX)
 
-/**
- * @brief   Default addresses used if the CPUID module is not present
- *
- * In case this address is used, that short address will be created by using the
- * last two bytes of the long address.
- */
-#define CC2420_ADDR_FALLBACK    {0x12, 0x22, 0x33, 0x44, 0x55, 0x66, 0x08, 0x15}
-
 /**
  * @brief   PAN ID configuration
  */

drivers/include/enc28j60.h

@@ -32,15 +32,6 @@
 extern "C" {
 #endif
 
-/**
- * @brief   Fallback MAC address in case CPUID is not available
- *
- * The enc28j60 does not provide a globally unique, pre-set MAC address, so we
- * need to create one. For this the CPUID module is used to create a locally
- * administered MAC. If this is not available, we use the MAC address below.
- */
-#define ENC28J60_FALLBACK_MAC       {0x02, 0x22, 0x33, 0x44, 0x55, 0x66}
-
 /**
  * @brief   Struct containing the needed peripheral configuration
  */

drivers/w5100/w5100.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 Freie Universität Berlin
+ * Copyright (C) 2016-2017 Freie Universität Berlin
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -22,8 +22,8 @@
 #include <string.h>
 
 #include "log.h"
+#include "uuid.h"
 #include "assert.h"
-#include "periph/cpuid.h"
 
 #include "net/ethernet.h"
 #include "net/netdev2/eth.h"
@@ -37,7 +37,6 @@
 
 #define SPI_CONF            SPI_CONF_FIRST_RISING
 #define RMSR_DEFAULT_VALUE  (0x55)
-#define MAC_SEED            (0x23)
 
 #define S0_MEMSIZE          (0x2000)
 #define S0_MASK             (S0_MEMSIZE - 1)
@@ -143,9 +142,6 @@ static int init(netdev2_t *netdev)
     w5100_t *dev = (w5100_t *)netdev;
     uint8_t tmp;
     uint8_t hwaddr[ETHERNET_ADDR_LEN];
-#if CPUID_LEN
-    uint8_t cpuid[CPUID_LEN];
-#endif
 
     /* test the SPI connection by reading the value of the RMSR register */
     tmp = rreg(dev, REG_TMSR);
@@ -159,13 +155,7 @@ static int init(netdev2_t *netdev)
     while (rreg(dev, REG_MODE) & MODE_RESET) {};
 
     /* initialize the device, start with writing the MAC address */
-    memset(hwaddr, MAC_SEED, ETHERNET_ADDR_LEN);
-#if CPUID_LEN
-    cpuid_get(cpuid);
-    for (int i = 0; i < CPUID_LEN; i++) {
-        hwaddr[i % ETHERNET_ADDR_LEN] ^= cpuid[i];
-    }
-#endif
+    uuid_get(hwaddr, ETHERNET_ADDR_LEN);
     hwaddr[0] &= ~0x03;         /* no group address and not globally unique */
     wchunk(dev, REG_SHAR0, hwaddr, ETHERNET_ADDR_LEN);