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