1/*
2 * Oracle
3 */
4
5/* \summary: Oracle DLT_PPI printer */
6
7#ifdef HAVE_CONFIG_H
8#include "config.h"
9#endif
10
11#include <netdissect-stdinc.h>
12
13#include "netdissect.h"
14#include "extract.h"
15
16typedef struct ppi_header {
17	uint8_t		ppi_ver;
18	uint8_t		ppi_flags;
19	uint16_t	ppi_len;
20	uint32_t	ppi_dlt;
21} ppi_header_t;
22
23#define	PPI_HDRLEN	8
24
25#ifdef DLT_PPI
26
27static inline void
28ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length)
29{
30	const ppi_header_t *hdr;
31	uint16_t len;
32	uint32_t dlt;
33	const char *dltname;
34
35	hdr = (const ppi_header_t *)bp;
36
37	len = EXTRACT_LE_16BITS(&hdr->ppi_len);
38	dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
39	dltname = pcap_datalink_val_to_name(dlt);
40
41	if (!ndo->ndo_qflag) {
42		ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver,
43			  (dltname != NULL ? dltname : "UNKNOWN"), dlt,
44                          len));
45        } else {
46		ND_PRINT((ndo, "%s", (dltname != NULL ? dltname : "UNKNOWN")));
47        }
48
49	ND_PRINT((ndo, ", length %u: ", length));
50}
51
52static u_int
53ppi_print(netdissect_options *ndo,
54               const struct pcap_pkthdr *h, const u_char *p)
55{
56	if_printer printer;
57	const ppi_header_t *hdr;
58	u_int caplen = h->caplen;
59	u_int length = h->len;
60	uint16_t len;
61	uint32_t dlt;
62	uint32_t hdrlen;
63	struct pcap_pkthdr nhdr;
64
65	if (caplen < sizeof(ppi_header_t)) {
66		ND_PRINT((ndo, "[|ppi]"));
67		return (caplen);
68	}
69
70	hdr = (const ppi_header_t *)p;
71	len = EXTRACT_LE_16BITS(&hdr->ppi_len);
72	if (caplen < len) {
73		/*
74		 * If we don't have the entire PPI header, don't
75		 * bother.
76		 */
77		ND_PRINT((ndo, "[|ppi]"));
78		return (caplen);
79	}
80	if (len < sizeof(ppi_header_t)) {
81		ND_PRINT((ndo, "[|ppi]"));
82		return (len);
83	}
84	dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
85
86	if (ndo->ndo_eflag)
87		ppi_header_print(ndo, p, length);
88
89	length -= len;
90	caplen -= len;
91	p += len;
92
93	if ((printer = lookup_printer(dlt)) != NULL) {
94		nhdr = *h;
95		nhdr.caplen = caplen;
96		nhdr.len = length;
97		hdrlen = printer(ndo, &nhdr, p);
98	} else {
99		if (!ndo->ndo_eflag)
100			ppi_header_print(ndo, (const u_char *)hdr, length + len);
101
102		if (!ndo->ndo_suppress_default_print)
103			ND_DEFAULTPRINT(p, caplen);
104		hdrlen = 0;
105	}
106	return (len + hdrlen);
107}
108
109/*
110 * This is the top level routine of the printer.  'p' points
111 * to the ether header of the packet, 'h->ts' is the timestamp,
112 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
113 * is the number of bytes actually captured.
114 */
115u_int
116ppi_if_print(netdissect_options *ndo,
117               const struct pcap_pkthdr *h, const u_char *p)
118{
119	return (ppi_print(ndo, h, p));
120}
121
122/*
123 * Local Variables:
124 * c-style: whitesmith
125 * c-basic-offset: 8
126 * End:
127 */
128
129#endif /* DLT_PPI */
130