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nwfilter: assure virNWFilterSnoop(Eth|Dhcp)Hdr structs don't change size

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These two objects are used to access fields in actual ethernet packets
captures with libpcap, so it's essential that they don't change size
for any reason. This patch uses gnulib's verify() macro to make sure
their sizes don't change.

Signed-off-by: Laine Stump <laine@laine.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Laine Stump 2018-02-19 12:56:11 -05:00
parent 75f4813c7d
commit f565321b26
1 changed files with 2 additions and 0 deletions
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2
src/nwfilter/nwfilter_dhcpsnoop.c
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@ -195,6 +195,7 @@ struct _virNWFilterSnoopEthHdr {
uint16_t eh_type;
uint8_t eh_data[];
} ATTRIBUTE_PACKED;
verify(sizeof(struct _virNWFilterSnoopEthHdr) == 14);
typedef struct _virNWFilterSnoopDHCPHdr virNWFilterSnoopDHCPHdr;
typedef virNWFilterSnoopDHCPHdr *virNWFilterSnoopDHCPHdrPtr;
@ -216,6 +217,7 @@ struct _virNWFilterSnoopDHCPHdr {
char d_file[128];
uint8_t d_opts[];
} ATTRIBUTE_PACKED;
verify(sizeof(struct _virNWFilterSnoopDHCPHdr) == 236);
/* DHCP options */