From 3b369bd212d5cabb46cff0e863298971b382bbd6 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 28 May 2015 15:38:32 +0300 Subject: ieee802154: Fix generation of random EUI-64 addresses. Currently, ieee802154_random_extended_addr() has a 50% chance of generating a group (multicast) address, while this function is used for generating station addresses (which can't be group addresses) for interfaces that don't have a hardware-provided address. Also, in case get_random_bytes() generates the EUI-64 address 00:00:00:00:00:00:00:00 (extremely unlikely), which is an invalid address, ieee802154_random_extended_addr() reacts by changing it to 01:00:00:00:00:00:00:00, which is an invalid station address as well, as it is a group address. This patch changes the address generation procedure to grab eight random bytes, treat that as an EUI-64, and then clear the Group address bit and set the Locally Administered bit, which is in line with how eth_random_addr() generates random EUI-48s. Signed-off-by: Lennert Buytenhek Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 8872ca103d06..552210d0a46f 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -244,9 +244,9 @@ static inline void ieee802154_random_extended_addr(__le64 *addr) { get_random_bytes(addr, IEEE802154_EXTENDED_ADDR_LEN); - /* toggle some bit if we hit an invalid extended addr */ - if (!ieee802154_is_valid_extended_addr(*addr)) - ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] ^= 0x01; + /* clear the group bit, and set the locally administered bit */ + ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] &= ~0x01; + ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] |= 0x02; } #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From daf4e2c89254ed6eb8cf7ef60f614edebfdb9f3a Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 28 May 2015 15:38:43 +0300 Subject: ieee802154: Fix EUI-64 station address validation. Refuse to allow setting an EUI-64 group address as an interface address, as those are not valid station addresses. Signed-off-by: Lennert Buytenhek Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 10 ++++------ net/mac802154/iface.c | 4 ++-- 2 files changed, 6 insertions(+), 8 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 552210d0a46f..1dc1f4ed4001 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -225,15 +225,13 @@ static inline bool ieee802154_is_valid_psdu_len(const u8 len) * ieee802154_is_valid_psdu_len - check if extended addr is valid * @addr: extended addr to check */ -static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) +static inline bool ieee802154_is_valid_extended_unicast_addr(const __le64 addr) { - /* These EUI-64 addresses are reserved by IEEE. 0xffffffffffffffff - * is used internally as extended to short address broadcast mapping. - * This is currently a workaround because neighbor discovery can't - * deal with short addresses types right now. + /* Bail out if the address is all zero, or if the group + * address bit is set. */ return ((addr != cpu_to_le64(0x0000000000000000ULL)) && - (addr != cpu_to_le64(0xffffffffffffffffULL))); + !(addr & cpu_to_le64(0x0100000000000000ULL))); } /** diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c index b544b5dc4bfb..6ac023932ce0 100644 --- a/net/mac802154/iface.c +++ b/net/mac802154/iface.c @@ -126,7 +126,7 @@ static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) return -EBUSY; ieee802154_be64_to_le64(&extended_addr, addr->sa_data); - if (!ieee802154_is_valid_extended_addr(extended_addr)) + if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) return -EINVAL; memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); @@ -539,7 +539,7 @@ ieee802154_if_add(struct ieee802154_local *local, const char *name, switch (type) { case NL802154_IFTYPE_NODE: ndev->type = ARPHRD_IEEE802154; - if (ieee802154_is_valid_extended_addr(extended_addr)) + if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr); else memcpy(ndev->dev_addr, ndev->perm_addr, -- cgit v1.2.3 From 1a1bc59c5f7657387d1a4b45d63248fed55ab88c Mon Sep 17 00:00:00 2001 From: Varka Bhadram Date: Fri, 29 May 2015 10:56:55 +0530 Subject: cc2520: fix CC2591 handling This patch changes tha way of handling of cc2591-cc2520 combination by moving amplified variable from platform data to private data. This will be useful in other sections like tx power support. Signed-off-by: Varka Bhadram Cc: Brad Campbell Signed-off-by: Marcel Holtmann --- drivers/net/ieee802154/cc2520.c | 10 ++++++++-- include/linux/spi/cc2520.h | 1 - 2 files changed, 8 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/drivers/net/ieee802154/cc2520.c b/drivers/net/ieee802154/cc2520.c index ea280d437ca1..0d9353756598 100644 --- a/drivers/net/ieee802154/cc2520.c +++ b/drivers/net/ieee802154/cc2520.c @@ -196,6 +196,7 @@ struct cc2520_private { u8 *buf; /* SPI TX/Rx data buffer */ struct mutex buffer_mutex; /* SPI buffer mutex */ bool is_tx; /* Flag for sync b/w Tx and Rx */ + bool amplified; /* Flag for CC2591 */ int fifo_pin; /* FIFO GPIO pin number */ struct work_struct fifop_irqwork;/* Workqueue for FIFOP */ spinlock_t lock; /* Lock for is_tx*/ @@ -738,7 +739,9 @@ static int cc2520_get_platform_data(struct spi_device *spi, pdata->vreg = of_get_named_gpio(np, "vreg-gpio", 0); pdata->reset = of_get_named_gpio(np, "reset-gpio", 0); - pdata->amplified = of_property_read_bool(np, "amplified"); + /* CC2591 front end for CC2520 */ + if (of_property_read_bool(np, "amplified")) + priv->amplified = true; return 0; } @@ -781,7 +784,7 @@ static int cc2520_hw_init(struct cc2520_private *priv) * amplifier. See section 8 page 17 of TI application note AN065. * http://www.ti.com/lit/an/swra229a/swra229a.pdf */ - if (pdata.amplified) { + if (priv->amplified) { ret = cc2520_write_register(priv, CC2520_AGCCTRL1, 0x16); if (ret) goto err_ret; @@ -896,6 +899,9 @@ static int cc2520_probe(struct spi_device *spi) spin_lock_init(&priv->lock); init_completion(&priv->tx_complete); + /* Assumption that CC2591 is not connected */ + priv->amplified = false; + /* Request all the gpio's */ if (!gpio_is_valid(pdata.fifo)) { dev_err(&spi->dev, "fifo gpio is not valid\n"); diff --git a/include/linux/spi/cc2520.h b/include/linux/spi/cc2520.h index e741e8baad92..85b8ee67e937 100644 --- a/include/linux/spi/cc2520.h +++ b/include/linux/spi/cc2520.h @@ -21,7 +21,6 @@ struct cc2520_platform_data { int sfd; int reset; int vreg; - bool amplified; }; #endif -- cgit v1.2.3