print-ppi.c revision 356341 
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	ND_TCHECK_16BITS(&hdr->ppi_len);
72	len = EXTRACT_LE_16BITS(&hdr->ppi_len);
73	if (caplen < len) {
74		/*
75		 * If we don't have the entire PPI header, don't
76		 * bother.
77		 */
78		ND_PRINT((ndo, "[|ppi]"));
79		return (caplen);
80	}
81	if (len < sizeof(ppi_header_t)) {
82		ND_PRINT((ndo, "[|ppi]"));
83		return (len);
84	}
85	ND_TCHECK_32BITS(&hdr->ppi_dlt);
86	dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
87
88	if (ndo->ndo_eflag)
89		ppi_header_print(ndo, p, length);
90
91	length -= len;
92	caplen -= len;
93	p += len;
94
95	if ((printer = lookup_printer(dlt)) != NULL) {
96		nhdr = *h;
97		nhdr.caplen = caplen;
98		nhdr.len = length;
99		hdrlen = printer(ndo, &nhdr, p);
100	} else {
101		if (!ndo->ndo_eflag)
102			ppi_header_print(ndo, (const u_char *)hdr, length + len);
103
104		if (!ndo->ndo_suppress_default_print)
105			ND_DEFAULTPRINT(p, caplen);
106		hdrlen = 0;
107	}
108	return (len + hdrlen);
109trunc:
110	return (caplen);
111}
112
113/*
114 * This is the top level routine of the printer.  'p' points
115 * to the ether header of the packet, 'h->ts' is the timestamp,
116 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
117 * is the number of bytes actually captured.
118 */
119u_int
120ppi_if_print(netdissect_options *ndo,
121               const struct pcap_pkthdr *h, const u_char *p)
122{
123	return (ppi_print(ndo, h, p));
124}
125
126/*
127 * Local Variables:
128 * c-style: whitesmith
129 * c-basic-offset: 8
130 * End:
131 */
132
133#endif /* DLT_PPI */
134