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      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
     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
     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
    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