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slirp: Fix build with gcc 9

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Build fails with gcc 9:

  CC      slirp/ndp_table.o
slirp/ndp_table.c: In function ‘ndp_table_add’:
slirp/ndp_table.c:31:23: error: taking address of packed member of ‘struct ndpentry’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
   31 |         if (in6_equal(&ndp_table->table[i].ip_addr, &ip_addr)) {
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
slirp/ndp_table.c: In function ‘ndp_table_search’:
slirp/ndp_table.c:75:23: error: taking address of packed member of ‘struct ndpentry’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
   75 |         if (in6_equal(&ndp_table->table[i].ip_addr, &ip_addr)) {
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

The ndpentry structure isn't used to model on-the-wire data or anything
else that would care for the struct layout. It doesn't need to be packed
actually. Just drop SLIRP_PACKED.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155143315831.102868.17515265400523392682.stgit@bahia.lan>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
This commit is contained in:
Greg Kurz 2019-03-01 10:39:18 +01:00 committed by Samuel Thibault
parent 32694e98b8
commit 8cabd8778c
1 changed files with 1 additions and 1 deletions
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slirp/slirp.h
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@ -106,7 +106,7 @@ bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
struct ndpentry {
unsigned char eth_addr[ETH_ALEN]; /* sender hardware address */
struct in6_addr ip_addr; /* sender IP address */
} SLIRP_PACKED;
};
#define NDP_TABLE_SIZE 16