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Implements better checks on incoming packets and LSAs in OSPF.

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This commit is contained in:
Ondrej Zajicek
2009-10-29 23:57:42 +01:00
parent 9d4d38d1a5
commit a6bc04d591
10 changed files with 340 additions and 101 deletions
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28
proto/ospf/ospf.h
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@@ -438,6 +438,8 @@ struct ospf_lsa_ext
u32 tag;
};
#define LSA_SUM_TOS 0xFF000000
#define LSA_EXT_TOS 0x7F000000
#define LSA_EXT_EBIT 0x80000000
/* Endianity swap for lsa->type */
@@ -545,6 +547,9 @@ lsa_net_count(struct ospf_lsa_header *lsa)
#ifdef OSPFv3
#define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
#define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
static inline u32 *
lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
{
@@ -575,6 +580,29 @@ lsa_get_ipv6_addr(u32 *buf, ip_addr *addr)
return buf + 4;
}
static inline u32 *
put_ipv6_prefix(u32 *buf, ip_addr addr, u8 pxlen, u8 pxopts, u16 lh)
{
*buf++ = ((pxlen << 24) | (pxopts << 16) | lh);
if (pxlen > 0)
*buf++ = _I0(addr);
if (pxlen > 32)
*buf++ = _I1(addr);
if (pxlen > 64)
*buf++ = _I2(addr);
if (pxlen > 96)
*buf++ = _I3(addr);
return buf;
}
static inline u32 *
put_ipv6_addr(u32 *buf, ip_addr addr)
{
*(ip_addr *) buf = addr;
return buf + 4;
}
#endif