The Tcpdump Group git mirrors - tcpdump/blob - print-ppi.c

   1 /*
   2  * Oracle
   3  */
   4
   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 u_int
  49 ppi_print(netdissect_options *ndo,
  50                const struct pcap_pkthdr *h, const u_char *p)
  51 {
  52         if_printer printer;
  53         const ppi_header_t *hdr;
  54         u_int caplen = h->caplen;
  55         u_int length = h->len;
  56         uint16_t len;
  57         uint32_t dlt;
  58         uint32_t hdrlen;
  59
  60         if (caplen < sizeof(ppi_header_t)) {
  61                 ND_PRINT((ndo, "[|ppi]"));
  62                 return (caplen);
  63         }
  64
  65         hdr = (const ppi_header_t *)p;
  66         len = EXTRACT_LE_16BITS(&hdr->ppi_len);
  67         if (caplen < len) {
  68                 /*
  69                  * If we don't have the entire PPI header, don't
  70                  * bother.
  71                  */
  72                 ND_PRINT((ndo, "[|ppi]"));
  73                 return (caplen);
  74         }
  75         if (len < sizeof(ppi_header_t)) {
  76                 ND_PRINT((ndo, "[|ppi]"));
  77                 return (len);
  78         }
  79         dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
  80
  81         if (ndo->ndo_eflag)
  82                 ppi_header_print(ndo, p, length);
  83
  84         length -= len;
  85         caplen -= len;
  86         p += len;
  87
  88         if ((printer = lookup_printer(dlt)) != NULL) {
  89                 hdrlen = printer(ndo, h, p);
  90         } else {
  91                 if (!ndo->ndo_eflag)
  92                         ppi_header_print(ndo, (const u_char *)hdr, length + len);
  93
  94                 if (!ndo->ndo_suppress_default_print)
  95                         ND_DEFAULTPRINT(p, caplen);
  96                 hdrlen = 0;
  97         }
  98         return (len + hdrlen);
  99 }
 100
 101 /*
 102  * This is the top level routine of the printer.  'p' points
 103  * to the ether header of the packet, 'h->ts' is the timestamp,
 104  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 105  * is the number of bytes actually captured.
 106  */
 107 u_int
 108 ppi_if_print(netdissect_options *ndo,
 109                const struct pcap_pkthdr *h, const u_char *p)
 110 {
 111         return (ppi_print(ndo, h, p));
 112 }
 113
 114 /*
 115  * Local Variables:
 116  * c-style: whitesmith
 117  * c-basic-offset: 8
 118  * End:
 119  */
 120
 121 #endif /* DLT_PPI */