forked from the-tcpdump-group/tcpdump
/
print-ppi.c
125 lines (104 loc) · 2.47 KB
/
print-ppi.c
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/*
* Oracle
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <netdissect-stdinc.h>
#include "netdissect.h"
#include "extract.h"
typedef struct ppi_header {
uint8_t ppi_ver;
uint8_t ppi_flags;
uint16_t ppi_len;
uint32_t ppi_dlt;
} ppi_header_t;
#define PPI_HDRLEN 8
#ifdef DLT_PPI
static inline void
ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
const ppi_header_t *hdr;
uint16_t len;
uint32_t dlt;
hdr = (const ppi_header_t *)bp;
len = EXTRACT_LE_16BITS(&hdr->ppi_len);
dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
if (!ndo->ndo_qflag) {
ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver,
pcap_datalink_val_to_name(dlt), dlt,
len));
} else {
ND_PRINT((ndo, "%s", pcap_datalink_val_to_name(dlt)));
}
ND_PRINT((ndo, ", length %u: ", length));
}
static u_int
ppi_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, const u_char *p)
{
if_printer printer;
const ppi_header_t *hdr;
u_int caplen = h->caplen;
u_int length = h->len;
uint16_t len;
uint32_t dlt;
uint32_t hdrlen;
struct pcap_pkthdr nhdr;
if (caplen < sizeof(ppi_header_t)) {
ND_PRINT((ndo, "[|ppi]"));
return (caplen);
}
hdr = (const ppi_header_t *)p;
len = EXTRACT_LE_16BITS(&hdr->ppi_len);
if (caplen < len) {
/*
* If we don't have the entire PPI header, don't
* bother.
*/
ND_PRINT((ndo, "[|ppi]"));
return (caplen);
}
if (len < sizeof(ppi_header_t)) {
ND_PRINT((ndo, "[|ppi]"));
return (len);
}
dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
if (ndo->ndo_eflag)
ppi_header_print(ndo, p, length);
length -= len;
caplen -= len;
p += len;
if ((printer = lookup_printer(dlt)) != NULL) {
nhdr = *h;
nhdr.caplen = caplen;
nhdr.len = length;
hdrlen = printer(ndo, &nhdr, p);
} else {
if (!ndo->ndo_eflag)
ppi_header_print(ndo, (const u_char *)hdr, length + len);
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
hdrlen = 0;
}
return (len + hdrlen);
}
/*
* This is the top level routine of the printer. 'p' points
* to the ether 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
ppi_if_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, const u_char *p)
{
return (ppi_print(ndo, h, p));
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/
#endif /* DLT_PPI */