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Fix bug #50883: struct eth_addr alignment does not fit with ETHADDR16_COPY

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... by simply removing ETHADDR16_COPY since noone advocated to keep it
This commit is contained in:
Dirk Ziegelmeier 2017-07-30 17:48:16 +02:00
parent 500598658d
commit 006bb84368
5 changed files with 6 additions and 14 deletions
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2
src/core/ipv4/autoip.c
View File

@ -460,7 +460,7 @@ autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
*/
ip4_addr_t sipaddr, dipaddr;
struct eth_addr netifaddr;
ETHADDR16_COPY(netifaddr.addr, netif->hwaddr);
SMEMCPY(netifaddr.addr, netif->hwaddr, ETH_HWADDR_LEN);
/* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support compilers without
* structure packing (not using structure copy which breaks strict-aliasing rules).

6
src/core/ipv4/etharp.c
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@ -464,7 +464,7 @@ etharp_update_arp_entry(struct netif *netif, const ip4_addr_t *ipaddr, struct et
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_update_arp_entry: updating stable entry %"S16_F"\n", (s16_t)i));
/* update address */
ETHADDR16_COPY(&arp_table[i].ethaddr, ethaddr);
SMEMCPY(&arp_table[i].ethaddr, ethaddr, ETH_HWADDR_LEN);
/* reset time stamp */
arp_table[i].ctime = 0;
/* this is where we will send out queued packets! */
@ -1132,8 +1132,8 @@ etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
(netif->hwaddr_len == ETH_HWADDR_LEN));
/* Write the ARP MAC-Addresses */
ETHADDR16_COPY(&hdr->shwaddr, hwsrc_addr);
ETHADDR16_COPY(&hdr->dhwaddr, hwdst_addr);
SMEMCPY(&hdr->shwaddr, hwsrc_addr, ETH_HWADDR_LEN);
SMEMCPY(&hdr->dhwaddr, hwdst_addr, ETH_HWADDR_LEN);
/* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support compilers without
* structure packing. */
IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T(&hdr->sipaddr, ipsrc_addr);

2
src/include/lwip/netif.h
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@ -314,8 +314,6 @@ struct netif {
/** maximum transfer unit (in bytes) */
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 */
u8_t hwaddr_len;

6
src/include/lwip/prot/ethernet.h
View File

@ -153,12 +153,6 @@ enum eth_type {
#define LL_IP6_MULTICAST_ADDR_0 0x33
#define LL_IP6_MULTICAST_ADDR_1 0x33
/** MEMCPY-like macro to copy to/from struct eth_addr's that are no local
* variables and known to be 16-bit aligned within the protocol header. */
#ifndef ETHADDR16_COPY
#define ETHADDR16_COPY(dst, src) SMEMCPY(dst, src, ETH_HWADDR_LEN)
#endif
#define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETH_HWADDR_LEN) == 0)
#ifdef __cplusplus

4
src/netif/ethernet.c
View File

@ -297,8 +297,8 @@ ethernet_output(struct netif* netif, struct pbuf* p,
ethhdr = (struct eth_hdr*)p->payload;
ethhdr->type = eth_type_be;
ETHADDR16_COPY(&ethhdr->dest, dst);
ETHADDR16_COPY(&ethhdr->src, src);
SMEMCPY(&ethhdr->dest, dst, ETH_HWADDR_LEN);
SMEMCPY(&ethhdr->src, src, ETH_HWADDR_LEN);
LWIP_ASSERT("netif->hwaddr_len must be 6 for ethernet_output!",
(netif->hwaddr_len == ETH_HWADDR_LEN));