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net: cosmetic: Do not use magic values for ARP_HLEN

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Commit 674bb24982 ("net: cosmetic: Replace magic numbers in arp.c with
constants") introduced a nice define to replace the magic value 6 for
the ethernet hardware address. Replace more hardcoded instances of 6
which really reference the ARP_HLEN (iow the MAC/Hardware/Ethernet
address).

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
oliver@schinagl.nl 2016-11-25 16:30:19 +01:00 • committed by Joe Hershberger
parent 6d2c1d26ee
commit a40db6d511
4 changed files with 38 additions and 36 deletions
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2
common/fdt_support.c
View file

@ -473,7 +473,7 @@ void fdt_fixup_ethernet(void *fdt)
char *tmp, *end; char *tmp, *end;
char mac[16]; char mac[16];
const char *path; const char *path;
unsigned char mac_addr[6]; unsigned char mac_addr[ARP_HLEN];
int offset; int offset;
if (fdt_path_offset(fdt, "/aliases") < 0) if (fdt_path_offset(fdt, "/aliases") < 0)

52
include/net.h
View file

@ -38,6 +38,9 @@
#define PKTALIGN ARCH_DMA_MINALIGN #define PKTALIGN ARCH_DMA_MINALIGN
/* ARP hardware address length */
#define ARP_HLEN 6
/* IPv4 addresses are always 32 bits in size */ /* IPv4 addresses are always 32 bits in size */
struct in_addr { struct in_addr {
__be32 s_addr; __be32 s_addr;
@ -90,7 +93,7 @@ enum eth_state_t {
*/ */
struct eth_pdata { struct eth_pdata {
phys_addr_t iobase; phys_addr_t iobase;
unsigned char enetaddr[6]; unsigned char enetaddr[ARP_HLEN];
int phy_interface; int phy_interface;
int max_speed; int max_speed;
}; };
@ -161,7 +164,7 @@ void eth_halt_state_only(void); /* Set passive state */
#ifndef CONFIG_DM_ETH #ifndef CONFIG_DM_ETH
struct eth_device { struct eth_device {
char name[16]; char name[16];
unsigned char enetaddr[6]; unsigned char enetaddr[ARP_HLEN];
phys_addr_t iobase; phys_addr_t iobase;
int state; int state;
@ -300,9 +303,9 @@ u32 ether_crc(size_t len, unsigned char const *p);
*/ */
struct ethernet_hdr { struct ethernet_hdr {
u8 et_dest[6]; /* Destination node */ u8 et_dest[ARP_HLEN]; /* Destination node */
u8 et_src[6]; /* Source node */ u8 et_src[ARP_HLEN]; /* Source node */
u16 et_protlen; /* Protocol or length */ u16 et_protlen; /* Protocol or length */
}; };
/* Ethernet header size */ /* Ethernet header size */
@ -311,16 +314,16 @@ struct ethernet_hdr {
#define ETH_FCS_LEN 4 /* Octets in the FCS */ #define ETH_FCS_LEN 4 /* Octets in the FCS */
struct e802_hdr { struct e802_hdr {
u8 et_dest[6]; /* Destination node */ u8 et_dest[ARP_HLEN]; /* Destination node */
u8 et_src[6]; /* Source node */ u8 et_src[ARP_HLEN]; /* Source node */
u16 et_protlen; /* Protocol or length */ u16 et_protlen; /* Protocol or length */
u8 et_dsap; /* 802 DSAP */ u8 et_dsap; /* 802 DSAP */
u8 et_ssap; /* 802 SSAP */ u8 et_ssap; /* 802 SSAP */
u8 et_ctl; /* 802 control */ u8 et_ctl; /* 802 control */
u8 et_snap1; /* SNAP */ u8 et_snap1; /* SNAP */
u8 et_snap2; u8 et_snap2;
u8 et_snap3; u8 et_snap3;
u16 et_prot; /* 802 protocol */ u16 et_prot; /* 802 protocol */
}; };
/* 802 + SNAP + ethernet header size */ /* 802 + SNAP + ethernet header size */
@ -330,11 +333,11 @@ struct e802_hdr {
* Virtual LAN Ethernet header * Virtual LAN Ethernet header
*/ */
struct vlan_ethernet_hdr { struct vlan_ethernet_hdr {
u8 vet_dest[6]; /* Destination node */ u8 vet_dest[ARP_HLEN]; /* Destination node */
u8 vet_src[6]; /* Source node */ u8 vet_src[ARP_HLEN]; /* Source node */
u16 vet_vlan_type; /* PROT_VLAN */ u16 vet_vlan_type; /* PROT_VLAN */
u16 vet_tag; /* TAG of VLAN */ u16 vet_tag; /* TAG of VLAN */
u16 vet_type; /* protocol type */ u16 vet_type; /* protocol type */
}; };
/* VLAN Ethernet header size */ /* VLAN Ethernet header size */
@ -405,7 +408,6 @@ struct arp_hdr {
# define ARP_ETHER 1 /* Ethernet hardware address */ # define ARP_ETHER 1 /* Ethernet hardware address */
u16 ar_pro; /* Format of protocol address */ u16 ar_pro; /* Format of protocol address */
u8 ar_hln; /* Length of hardware address */ u8 ar_hln; /* Length of hardware address */
# define ARP_HLEN 6
u8 ar_pln; /* Length of protocol address */ u8 ar_pln; /* Length of protocol address */
# define ARP_PLEN 4 # define ARP_PLEN 4
u16 ar_op; /* Operation */ u16 ar_op; /* Operation */
@ -514,16 +516,16 @@ extern char net_nis_domain[32]; /* Our IS domain */
extern char net_hostname[32]; /* Our hostname */ extern char net_hostname[32]; /* Our hostname */
extern char net_root_path[64]; /* Our root path */ extern char net_root_path[64]; /* Our root path */
/** END OF BOOTP EXTENTIONS **/ /** END OF BOOTP EXTENTIONS **/
extern u8 net_ethaddr[6]; /* Our ethernet address */ extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
extern u8 net_server_ethaddr[6]; /* Boot server enet address */ extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */ extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */ extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
extern uchar *net_tx_packet; /* THE transmit packet */ extern uchar *net_tx_packet; /* THE transmit packet */
extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */ extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
extern uchar *net_rx_packet; /* Current receive packet */ extern uchar *net_rx_packet; /* Current receive packet */
extern int net_rx_packet_len; /* Current rx packet length */ extern int net_rx_packet_len; /* Current rx packet length */
extern const u8 net_bcast_ethaddr[6]; /* Ethernet broadcast address */ extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
extern const u8 net_null_ethaddr[6]; extern const u8 net_null_ethaddr[ARP_HLEN];
#define VLAN_NONE 4095 /* untagged */ #define VLAN_NONE 4095 /* untagged */
#define VLAN_IDMASK 0x0fff /* mask of valid vlan id */ #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
@ -562,9 +564,9 @@ extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
*/ */
static inline int is_cdp_packet(const uchar *ethaddr) static inline int is_cdp_packet(const uchar *ethaddr)
{ {
extern const u8 net_cdp_ethaddr[6]; extern const u8 net_cdp_ethaddr[ARP_HLEN];
return memcmp(ethaddr, net_cdp_ethaddr, 6) == 0; return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
} }
#endif #endif

10
net/eth-uclass.c
View file

@ -230,7 +230,7 @@ static int on_ethaddr(const char *name, const char *value, enum env_op op,
eth_write_hwaddr(dev); eth_write_hwaddr(dev);
break; break;
case env_op_delete: case env_op_delete:
memset(pdata->enetaddr, 0, 6); memset(pdata->enetaddr, 0, ARP_HLEN);
} }
} }
@ -458,7 +458,7 @@ static int eth_post_probe(struct udevice *dev)
{ {
struct eth_device_priv *priv = dev->uclass_priv; struct eth_device_priv *priv = dev->uclass_priv;
struct eth_pdata *pdata = dev->platdata; struct eth_pdata *pdata = dev->platdata;
unsigned char env_enetaddr[6]; unsigned char env_enetaddr[ARP_HLEN];
#if defined(CONFIG_NEEDS_MANUAL_RELOC) #if defined(CONFIG_NEEDS_MANUAL_RELOC)
struct eth_ops *ops = eth_get_ops(dev); struct eth_ops *ops = eth_get_ops(dev);
@ -497,7 +497,7 @@ static int eth_post_probe(struct udevice *dev)
eth_getenv_enetaddr_by_index("eth", dev->seq, env_enetaddr); eth_getenv_enetaddr_by_index("eth", dev->seq, env_enetaddr);
if (!is_zero_ethaddr(env_enetaddr)) { if (!is_zero_ethaddr(env_enetaddr)) {
if (!is_zero_ethaddr(pdata->enetaddr) && if (!is_zero_ethaddr(pdata->enetaddr) &&
memcmp(pdata->enetaddr, env_enetaddr, 6)) { memcmp(pdata->enetaddr, env_enetaddr, ARP_HLEN)) {
printf("\nWarning: %s MAC addresses don't match:\n", printf("\nWarning: %s MAC addresses don't match:\n",
dev->name); dev->name);
printf("Address in SROM is %pM\n", printf("Address in SROM is %pM\n",
@ -507,7 +507,7 @@ static int eth_post_probe(struct udevice *dev)
} }
/* Override the ROM MAC address */ /* Override the ROM MAC address */
memcpy(pdata->enetaddr, env_enetaddr, 6); memcpy(pdata->enetaddr, env_enetaddr, ARP_HLEN);
} else if (is_valid_ethaddr(pdata->enetaddr)) { } else if (is_valid_ethaddr(pdata->enetaddr)) {
eth_setenv_enetaddr_by_index("eth", dev->seq, pdata->enetaddr); eth_setenv_enetaddr_by_index("eth", dev->seq, pdata->enetaddr);
printf("\nWarning: %s using MAC address from ROM\n", printf("\nWarning: %s using MAC address from ROM\n",
@ -535,7 +535,7 @@ static int eth_pre_remove(struct udevice *dev)
eth_get_ops(dev)->stop(dev); eth_get_ops(dev)->stop(dev);
/* clear the MAC address */ /* clear the MAC address */
memset(pdata->enetaddr, 0, 6); memset(pdata->enetaddr, 0, ARP_HLEN);
return 0; return 0;
} }

10
net/eth_legacy.c
View file

@ -121,7 +121,7 @@ static int on_ethaddr(const char *name, const char *value, enum env_op op,
eth_write_hwaddr(dev, "eth", dev->index); eth_write_hwaddr(dev, "eth", dev->index);
break; break;
case env_op_delete: case env_op_delete:
memset(dev->enetaddr, 0, 6); memset(dev->enetaddr, 0, ARP_HLEN);
} }
} }
dev = dev->next; dev = dev->next;
@ -134,14 +134,14 @@ U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
int eth_write_hwaddr(struct eth_device *dev, const char *base_name, int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
int eth_number) int eth_number)
{ {
unsigned char env_enetaddr[6]; unsigned char env_enetaddr[ARP_HLEN];
int ret = 0; int ret = 0;
eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr); eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
if (!is_zero_ethaddr(env_enetaddr)) { if (!is_zero_ethaddr(env_enetaddr)) {
if (!is_zero_ethaddr(dev->enetaddr) && if (!is_zero_ethaddr(dev->enetaddr) &&
memcmp(dev->enetaddr, env_enetaddr, 6)) { memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) {
printf("\nWarning: %s MAC addresses don't match:\n", printf("\nWarning: %s MAC addresses don't match:\n",
dev->name); dev->name);
printf("Address in SROM is %pM\n", printf("Address in SROM is %pM\n",
@ -150,7 +150,7 @@ int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
env_enetaddr); env_enetaddr);
} }
memcpy(dev->enetaddr, env_enetaddr, 6); memcpy(dev->enetaddr, env_enetaddr, ARP_HLEN);
} else if (is_valid_ethaddr(dev->enetaddr)) { } else if (is_valid_ethaddr(dev->enetaddr)) {
eth_setenv_enetaddr_by_index(base_name, eth_number, eth_setenv_enetaddr_by_index(base_name, eth_number,
dev->enetaddr); dev->enetaddr);
@ -299,7 +299,7 @@ int eth_initialize(void)
*/ */
int eth_mcast_join(struct in_addr mcast_ip, int join) int eth_mcast_join(struct in_addr mcast_ip, int join)
{ {
u8 mcast_mac[6]; u8 mcast_mac[ARP_HLEN];
if (!eth_current || !eth_current->mcast) if (!eth_current || !eth_current->mcast)
return -1; return -1;
mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff; mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;