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      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 */
    120