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
16 typedef 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
27 static inline void
ppi_header_print(netdissect_options * ndo,const u_char * bp,u_int length)28 ppi_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
52 static u_int
ppi_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)53 ppi_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 */
115 u_int
ppi_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)116 ppi_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