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fixed bug #24517: IP reassembly crashes on unaligned IP headers by packing the struct ip_reass_helper.

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goldsimon 2008-10-15 18:20:23 +00:00
parent 06df1647e1
commit 13a139eef7
2 changed files with 17 additions and 4 deletions
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4
CHANGELOG
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@ -51,6 +51,10 @@ HISTORY
++ Bugfixes:
2008-10-15 Simon Goldschmidt
* ip_frag.c: fixed bug #24517: IP reassembly crashes on unaligned IP headers
by packing the struct ip_reass_helper.
2008-10-03 David Woodhouse, Jonathan Larmour
* etharp.c (etharp_arp_input): Fix type aliasing problem copying ip address.

17
src/core/ipv4/ip_frag.c
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@ -81,12 +81,21 @@
/** This is a helper struct which holds the starting
* offset and the ending offset of this fragment to
* easily chain the fragments.
* It has to be packed since it has to fit inside the IP header.
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip_reass_helper {
struct pbuf *next_pbuf;
u16_t start;
u16_t end;
};
PACK_STRUCT_FIELD(struct pbuf *next_pbuf);
PACK_STRUCT_FIELD(u16_t start);
PACK_STRUCT_FIELD(u16_t end);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define IP_ADDRESSES_AND_ID_MATCH(iphdrA, iphdrB) \
(ip_addr_cmp(&(iphdrA)->src, &(iphdrB)->src) && \