u_int
cip_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
u_short extracted_ethertype;
if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) {
printf("[|cip]");
return (0);
}
if (eflag)
cip_print(length);
if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) {
if (llc_print(p, length, caplen, NULL, NULL,
&extracted_ethertype) == 0) {
if (!eflag)
cip_print(length);
if (extracted_ethertype) {
printf("(LLC %s) ",
etherproto_string(htons(extracted_ethertype)));
}
if (!suppress_default_print)
default_print(p, caplen);
}
} else {
ip_print(gndo, p, length);
}
return (0);
}
/*
* This is the top level routine of the printer. 'p' points
* to the LLC/SNAP or raw header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
cip_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
u_short extracted_ethertype;
if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) {
printf("[|cip]");
return (0);
}
if (eflag)
cip_print(length);
if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) {
/*
* LLC header is present. Try to print it & higher layers.
*/
if (llc_print(p, length, caplen, NULL, NULL,
&extracted_ethertype) == 0) {
/* ether_type not known, print raw packet */
if (!eflag)
cip_print(length);
if (extracted_ethertype) {
printf("(LLC %s) ",
etherproto_string(htons(extracted_ethertype)));
}
if (!suppress_default_print)
default_print(p, caplen);
}
} else {
/*
* LLC header is absent; treat it as just IP.
*/
ip_print(gndo, p, length);
}
return (0);
}
/*
* This is the top level routine of the printer. 'p' points
* to the LLC/SNAP or raw header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
cip_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
size_t cmplen;
int llc_hdrlen;
ndo->ndo_protocol = "cip_if";
cmplen = sizeof(rfcllc);
if (cmplen > caplen)
cmplen = caplen;
if (cmplen > length)
cmplen = length;
if (ndo->ndo_eflag)
cip_print(ndo, length);
if (cmplen == 0) {
ND_PRINT("[|cip]");
return 0;
}
if (memcmp(rfcllc, p, cmplen) == 0) {
/*
* LLC header is present. Try to print it & higher layers.
*/
llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
if (llc_hdrlen < 0) {
/* packet type not known, print raw packet */
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
llc_hdrlen = -llc_hdrlen;
}
} else {
/*
* LLC header is absent; treat it as just IP.
*/
llc_hdrlen = 0;
ip_print(ndo, p, length);
}
return (llc_hdrlen);
}
