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