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 void
  49 ppi_print(netdissect_options *ndo,
  50                const struct pcap_pkthdr *h, const u_char *p)
  51 {
  52         if_printer printer;
  53         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
  59         if (caplen < sizeof(ppi_header_t)) {
  60                 ND_PRINT((ndo, "[|ppi]"));
  61                 return;
  62         }
  63
  64         hdr = (ppi_header_t *)p;
  65         len = EXTRACT_LE_16BITS(&hdr->ppi_len);
  66         if (len < sizeof(ppi_header_t)) {
  67                 ND_PRINT((ndo, "[|ppi]"));
  68                 return;
  69         }
  70         if (caplen < len) {
  71                 ND_PRINT((ndo, "[|ppi]"));
  72                 return;
  73         }
  74         dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
  75
  76         if (ndo->ndo_eflag)
  77                 ppi_header_print(ndo, p, length);
  78
  79         length -= len;
  80         caplen -= len;
  81         p += len;
  82
  83         if ((printer = lookup_printer(dlt)) != NULL) {
  84                 printer(ndo, h, p);
  85         } else {
  86                 if (!ndo->ndo_eflag)
  87                         ppi_header_print(ndo, (u_char *)hdr, length + len);
  88
  89                 if (!ndo->ndo_suppress_default_print)
  90                         ND_DEFAULTPRINT(p, caplen);
  91         }
  92 }
  93
  94 /*
  95  * This is the top level routine of the printer.  'p' points
  96  * to the ether header of the packet, 'h->ts' is the timestamp,
  97  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  98  * is the number of bytes actually captured.
  99  */
 100 u_int
 101 ppi_if_print(netdissect_options *ndo,
 102                const struct pcap_pkthdr *h, const u_char *p)
 103 {
 104         ppi_print(ndo, h, p);
 105
 106         return (sizeof(ppi_header_t));
 107 }
 108
 109 /*
 110  * Local Variables:
 111  * c-style: whitesmith
 112  * c-basic-offset: 8
 113  * End:
 114  */
 115
 116 #endif /* DLT_PPI */