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

   1 /*
   2  * Oracle
   3  */
   4 #ifdef HAVE_CONFIG_H
   5 #include "config.h"
   6 #endif
   7
   8 #include <tcpdump-stdinc.h>
   9
  10 #include <stdio.h>
  11 #include <pcap.h>
  12
  13 #include "netdissect.h"
  14 #include "interface.h"
  15 #include "extract.h"
  16
  17 typedef struct ppi_header {
  18         uint8_t         ppi_ver;
  19         uint8_t         ppi_flags;
  20         uint16_t        ppi_len;
  21         uint32_t        ppi_dlt;
  22 } ppi_header_t;
  23
  24 #define PPI_HDRLEN      8
  25
  26 #ifdef DLT_PPI
  27
  28 static inline void
  29 ppi_header_print(struct netdissect_options *ndo, const u_char *bp, u_int length)
  30 {
  31         const ppi_header_t *hdr;
  32         u_int32_t dlt;
  33         u_int16_t len;
  34
  35         hdr = (const ppi_header_t *)bp;
  36
  37         len = EXTRACT_16BITS(&hdr->ppi_len);
  38         dlt = EXTRACT_32BITS(&hdr->ppi_dlt);
  39
  40         if (!ndo->ndo_qflag) {
  41                 ND_PRINT((ndo,", V.%d DLT %s (%d) len %d", hdr->ppi_ver,
  42                           pcap_datalink_val_to_name(dlt), dlt,
  43                           len));
  44         } else {
  45                 ND_PRINT((ndo,", %s", pcap_datalink_val_to_name(dlt)));
  46         }
  47
  48         ND_PRINT((ndo, ", length %u: ", length));
  49 }
  50
  51 static void
  52 ppi_print(struct netdissect_options *ndo,
  53                const struct pcap_pkthdr *h, const u_char *p)
  54 {
  55         if_ndo_printer ndo_printer;
  56         if_printer printer;
  57         ppi_header_t *hdr;
  58         u_int caplen = h->caplen;
  59         u_int length = h->len;
  60         u_int32_t dlt;
  61
  62         if (caplen < sizeof(ppi_header_t)) {
  63                 ND_PRINT((ndo, "[|ppi]"));
  64                 return;
  65         }
  66         hdr = (ppi_header_t *)p;
  67         dlt = EXTRACT_32BITS(&hdr->ppi_dlt);
  68
  69         if (ndo->ndo_eflag)
  70                 ppi_header_print(ndo, p, length);
  71
  72         length -= sizeof(ppi_header_t);
  73         caplen -= sizeof(ppi_header_t);
  74         p += sizeof(ppi_header_t);
  75
  76         if ((printer = lookup_printer(dlt)) != NULL) {
  77                 printer(h, p);
  78         } else if ((ndo_printer = lookup_ndo_printer(dlt)) != NULL) {
  79                 ndo_printer(ndo, h, p);
  80         } else {
  81                 if (!ndo->ndo_eflag)
  82                         ppi_header_print(ndo, (u_char *)hdr,
  83                                         length + sizeof(ppi_header_t));
  84
  85                 if (!ndo->ndo_suppress_default_print)
  86                         ndo->ndo_default_print(ndo, p, caplen);
  87         }
  88 }
  89
  90 /*
  91  * This is the top level routine of the printer.  'p' points
  92  * to the ether header of the packet, 'h->ts' is the timestamp,
  93  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  94  * is the number of bytes actually captured.
  95  */
  96 u_int
  97 ppi_if_print(struct netdissect_options *ndo,
  98                const struct pcap_pkthdr *h, const u_char *p)
  99 {
 100         ppi_print(ndo, h, p);
 101
 102         return (sizeof(ppi_header_t));
 103 }
 104
 105 /*
 106  * Local Variables:
 107  * c-style: whitesmith
 108  * c-basic-offset: 8
 109  * End:
 110  */
 111
 112 #endif /* DLT_PPI */