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1 office 1 /*
2 * Oracle
3 */
4 #define NETDISSECT_REWORKED
5 #ifdef HAVE_CONFIG_H
6 #include "config.h"
7 #endif
8  
9 #include <tcpdump-stdinc.h>
10  
11 #include "interface.h"
12 #include "extract.h"
13  
14 typedef struct ppi_header {
15 uint8_t ppi_ver;
16 uint8_t ppi_flags;
17 uint16_t ppi_len;
18 uint32_t ppi_dlt;
19 } ppi_header_t;
20  
21 #define PPI_HDRLEN 8
22  
23 #ifdef DLT_PPI
24  
25 static inline void
26 ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length)
27 {
28 const ppi_header_t *hdr;
29 uint16_t len;
30 uint32_t dlt;
31  
32 hdr = (const ppi_header_t *)bp;
33  
34 len = EXTRACT_LE_16BITS(&hdr->ppi_len);
35 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
36  
37 if (!ndo->ndo_qflag) {
38 ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver,
39 pcap_datalink_val_to_name(dlt), dlt,
40 len));
41 } else {
42 ND_PRINT((ndo, "%s", pcap_datalink_val_to_name(dlt)));
43 }
44  
45 ND_PRINT((ndo, ", length %u: ", length));
46 }
47  
48 static void
49 ppi_print(netdissect_options *ndo,
50 const struct pcap_pkthdr *h, const u_char *p)
51 {
52 if_ndo_printer ndo_printer;
53 if_printer printer;
54 ppi_header_t *hdr;
55 u_int caplen = h->caplen;
56 u_int length = h->len;
57 uint16_t len;
58 uint32_t dlt;
59  
60 if (caplen < sizeof(ppi_header_t)) {
61 ND_PRINT((ndo, "[|ppi]"));
62 return;
63 }
64  
65 hdr = (ppi_header_t *)p;
66 len = EXTRACT_LE_16BITS(&hdr->ppi_len);
67 if (len < sizeof(ppi_header_t)) {
68 ND_PRINT((ndo, "[|ppi]"));
69 return;
70 }
71 if (caplen < len) {
72 ND_PRINT((ndo, "[|ppi]"));
73 return;
74 }
75 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
76  
77 if (ndo->ndo_eflag)
78 ppi_header_print(ndo, p, length);
79  
80 length -= len;
81 caplen -= len;
82 p += len;
83  
84 if ((printer = lookup_printer(dlt)) != NULL) {
85 printer(h, p);
86 } else if ((ndo_printer = lookup_ndo_printer(dlt)) != NULL) {
87 ndo_printer(ndo, h, p);
88 } else {
89 if (!ndo->ndo_eflag)
90 ppi_header_print(ndo, (u_char *)hdr, length + len);
91  
92 if (!ndo->ndo_suppress_default_print)
93 ND_DEFAULTPRINT(p, caplen);
94 }
95 }
96  
97 /*
98 * This is the top level routine of the printer. 'p' points
99 * to the ether header of the packet, 'h->ts' is the timestamp,
100 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
101 * is the number of bytes actually captured.
102 */
103 u_int
104 ppi_if_print(netdissect_options *ndo,
105 const struct pcap_pkthdr *h, const u_char *p)
106 {
107 ppi_print(ndo, h, p);
108  
109 return (sizeof(ppi_header_t));
110 }
111  
112 /*
113 * Local Variables:
114 * c-style: whitesmith
115 * c-basic-offset: 8
116 * End:
117 */
118  
119 #endif /* DLT_PPI */