void mac_hcksum_set(mblk_t *mp, uint32_t start, uint32_t stuff,
uint32_t end, uint32_t value, uint32_t flags)
{
ASSERT(DB_TYPE(mp) == M_DATA);
DB_CKSUMSTART(mp) = (intptr_t)start;
DB_CKSUMSTUFF(mp) = (intptr_t)stuff;
DB_CKSUMEND(mp) = (intptr_t)end;
DB_CKSUMFLAGS(mp) = (uint16_t)flags;
DB_CKSUM16(mp) = (uint16_t)value;
}
/*ARGSUSED*/
static int
ip_isvalidchecksum(net_handle_t neti, mblk_t *mp)
{
unsigned char *wptr;
ipha_t *ipha = (ipha_t *)mp->b_rptr;
int hlen;
int ret;
ASSERT(mp != NULL);
if (dohwcksum &&
DB_CKSUM16(mp) != 0xFFFF &&
(DB_CKSUMFLAGS(mp) & HCK_FULLCKSUM) &&
(DB_CKSUMFLAGS(mp) & HCK_FULLCKSUM_OK) &&
(DB_CKSUMFLAGS(mp) & HCK_IPV4_HDRCKSUM))
return (1);
hlen = (ipha->ipha_version_and_hdr_length & 0x0F) << 2;
/*
* Check that the mblk being passed in has enough data in it
* before blindly checking ip_cksum.
*/
if (msgdsize(mp) < hlen)
return (0);
if (mp->b_wptr < mp->b_rptr + hlen) {
if (pullupmsg(mp, hlen) == 0)
return (0);
wptr = mp->b_wptr;
} else {
wptr = mp->b_wptr;
mp->b_wptr = mp->b_rptr + hlen;
}
if (ipha->ipha_hdr_checksum == ip_cksum(mp, 0, ipha->ipha_hdr_checksum))
ret = 1;
else
ret = 0;
mp->b_wptr = wptr;
return (ret);
}
void mac_hcksum_get(mblk_t *mp, uint32_t *start, uint32_t *stuff,
uint32_t *end, uint32_t *value, uint32_t *flags_ptr)
{
uint32_t flags;
ASSERT(DB_TYPE(mp) == M_DATA);
flags = DB_CKSUMFLAGS(mp) & HCK_FLAGS;
if ((flags & (HCK_PARTIALCKSUM | HCK_FULLCKSUM)) != 0) {
if (value != NULL)
*value = (uint32_t)DB_CKSUM16(mp);
if ((flags & HCK_PARTIALCKSUM) != 0) {
if (start != NULL)
*start = (uint32_t)DB_CKSUMSTART(mp);
if (stuff != NULL)
*stuff = (uint32_t)DB_CKSUMSTUFF(mp);
if (end != NULL)
*end = (uint32_t)DB_CKSUMEND(mp);
}
}
if (flags_ptr != NULL)
*flags_ptr = flags;
}
