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packet fix for for netware 3.11 (initial patch by Mark Jonckheere) - security bug fix

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1363 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-04-10 14:51:41 +00:00
parent d39c0b990a
commit 40545f84cf
1 changed files with 10 additions and 2 deletions
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12
hw/ne2000.c
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@ -246,7 +246,7 @@ static void ne2000_receive(void *opaque, const uint8_t *buf, int size)
static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
NE2000State *s = opaque;
int offset, page;
int offset, page, index;
addr &= 0xf;
#ifdef DEBUG_NE2000
@ -264,10 +264,18 @@ static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
ne2000_update_irq(s);
}
if (val & E8390_TRANS) {
qemu_send_packet(s->nd, s->mem + (s->tpsr << 8), s->tcnt);
index = (s->tpsr << 8);
/* XXX: next 2 lines are a hack to make netware 3.11 work */
if (index >= NE2000_PMEM_END)
index -= NE2000_PMEM_SIZE;
/* fail safe: check range on the transmitted length */
if (index + s->tcnt <= NE2000_PMEM_END) {
qemu_send_packet(s->nd, s->mem + index, s->tcnt);
}
/* signal end of transfert */
s->tsr = ENTSR_PTX;
s->isr |= ENISR_TX;
s->cmd &= ~E8390_TRANS;
ne2000_update_irq(s);
}
}