void
capture_ethertype(guint16 etype, const guchar *pd, int offset, int len,
packet_counts *ld)
{
switch (etype) {
case ETHERTYPE_ARP:
ld->arp++;
break;
case ETHERTYPE_IP:
capture_ip(pd, offset, len, ld);
break;
case ETHERTYPE_IPv6:
capture_ipv6(pd, offset, len, ld);
break;
case ETHERTYPE_IPX:
capture_ipx(ld);
break;
case ETHERTYPE_VLAN:
capture_vlan(pd, offset, len, ld);
break;
case ETHERTYPE_IEEE_802_1AD:
case ETHERTYPE_IEEE_802_1AH:
capture_ieee8021ah(pd, offset, len, ld);
break;
case ETHERTYPE_VINES_IP:
case ETHERTYPE_VINES_ECHO:
capture_vines(ld);
break;
default:
ld->other++;
break;
}
}
void
capture_llc(const guchar *pd, int offset, int len, packet_counts *ld) {
int is_snap;
guint16 control;
int llc_header_len;
if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
ld->other++;
return;
}
is_snap = (pd[offset] == SAP_SNAP) && (pd[offset+1] == SAP_SNAP);
llc_header_len = 2; /* DSAP + SSAP */
/*
* XXX - the page referred to in the comment above about the
* Command/Response bit also implies that LLC Type 2 always
* uses extended operation, so we don't need to determine
* whether it's basic or extended operation; is that the case?
*/
control = get_xdlc_control(pd, offset+2, pd[offset+1] & SSAP_CR_BIT);
llc_header_len += XDLC_CONTROL_LEN(control, TRUE);
if (!BYTES_ARE_IN_FRAME(offset, len, llc_header_len)) {
ld->other++;
return;
}
if (!XDLC_IS_INFORMATION(control)) {
ld->other++;
return;
}
if (is_snap)
capture_snap(pd, offset+llc_header_len, len, ld);
else {
/* non-SNAP */
switch (pd[offset]) {
case SAP_IP:
capture_ip(pd, offset + llc_header_len, len, ld);
break;
case SAP_NETWARE1:
case SAP_NETWARE2:
capture_ipx(ld);
break;
case SAP_NETBIOS:
capture_netbios(ld);
break;
case SAP_VINES1:
case SAP_VINES2:
capture_vines(ld);
break;
default:
ld->other++;
break;
}
}
}