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Fix part 1 of bug #50042: ETHADDR16_COPY from netif->hwaddr

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Rearrange struct netif to group more u8_t values together which may result in smaller struct netif on 32 bit systems
This commit is contained in:
Dirk Ziegelmeier 2017-01-13 08:06:50 +01:00
parent bc583c993a
commit 6748aa0818
1 changed files with 12 additions and 10 deletions
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22
src/include/lwip/netif.h
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@ -287,14 +287,6 @@ struct netif {
#ifdef netif_get_client_data #ifdef netif_get_client_data
void* client_data[LWIP_NETIF_CLIENT_DATA_INDEX_MAX + LWIP_NUM_NETIF_CLIENT_DATA]; void* client_data[LWIP_NETIF_CLIENT_DATA_INDEX_MAX + LWIP_NUM_NETIF_CLIENT_DATA];
#endif #endif
#if LWIP_IPV6_AUTOCONFIG
/** is this netif enabled for IPv6 autoconfiguration */
u8_t ip6_autoconfig_enabled;
#endif /* LWIP_IPV6_AUTOCONFIG */
#if LWIP_IPV6_SEND_ROUTER_SOLICIT
/** Number of Router Solicitation messages that remain to be sent. */
u8_t rs_count;
#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
#if LWIP_NETIF_HOSTNAME #if LWIP_NETIF_HOSTNAME
/* the hostname for this netif, NULL is a valid value */ /* the hostname for this netif, NULL is a valid value */
const char* hostname; const char* hostname;
@ -304,16 +296,26 @@ struct netif {
#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/ #endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/
/** maximum transfer unit (in bytes) */ /** maximum transfer unit (in bytes) */
u16_t mtu; u16_t mtu;
/** link level hardware address of this interface */
/* Ensure hwaddr is 16-bit aligned by placing it behind u16_t value
* because it is accessed via ETHADDR16_COPY() macro in etharp.c and autoip.c */
u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
/** number of bytes used in hwaddr */ /** number of bytes used in hwaddr */
u8_t hwaddr_len; u8_t hwaddr_len;
/** link level hardware address of this interface */
u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
/** flags (@see @ref netif_flags) */ /** flags (@see @ref netif_flags) */
u8_t flags; u8_t flags;
/** descriptive abbreviation */ /** descriptive abbreviation */
char name[2]; char name[2];
/** number of this interface */ /** number of this interface */
u8_t num; u8_t num;
#if LWIP_IPV6_AUTOCONFIG
/** is this netif enabled for IPv6 autoconfiguration */
u8_t ip6_autoconfig_enabled;
#endif /* LWIP_IPV6_AUTOCONFIG */
#if LWIP_IPV6_SEND_ROUTER_SOLICIT
/** Number of Router Solicitation messages that remain to be sent. */
u8_t rs_count;
#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
#if MIB2_STATS #if MIB2_STATS
/** link type (from "snmp_ifType" enum from snmp_mib2.h) */ /** link type (from "snmp_ifType" enum from snmp_mib2.h) */
u8_t link_type; u8_t link_type;