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Only respond to ARP packets.

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This commit is contained in:
Gregory Alexander 2001-06-20 01:00:04 +00:00
parent 12985edb26
commit ce339e0b78
1 changed files with 4 additions and 2 deletions
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6
bochs/iodev/eth_arpback.cc
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@ -34,6 +34,7 @@
static const Bit8u external_mac[]={0xB0, 0xC4, 0x20, 0x20, 0x00, 0x00, 0x00};
static const Bit8u external_ip[]={ 192, 168, 0, 2, 0x00 };
static const Bit8u broadcast_mac[]={0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00};
static const Bit8u ethtype_arp[]={0x08, 0x06, 0x00};
#define MAX_FRAME_SIZE 2048
@ -112,7 +113,8 @@ void
bx_arpback_pktmover_c::sendpkt(void *buf, unsigned io_len)
{
if(io_len<MAX_FRAME_SIZE) {
if((!memcmp(buf, external_mac, 6)) || (!memcmp(buf, broadcast_mac, 6)) ) {
if(( (!memcmp(buf, external_mac, 6)) || (!memcmp(buf, broadcast_mac, 6)) )
&& (!memcmp(((Bit8u *)buf)+12, ethtype_arp, 2)) ) {
Bit32u tempcrc;
memcpy(arpbuf,buf,io_len); //move to temporary buffer
memcpy(arpbuf, arpbuf+6, 6); //set destination to sender
@ -123,7 +125,7 @@ bx_arpback_pktmover_c::sendpkt(void *buf, unsigned io_len)
arpbuf[21]=2; //make this a reply and not a request
tempcrc=mycrc.get_CRC(arpbuf,io_len);
memcpy(arpbuf+io_len, &tempcrc, 4);
buflen=io_len+4;
buflen=io_len/*+4*/;
bufvalid=1;
}
}