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

   1 /* \summary: Solaris DLT_IPNET printer */
   2
   3 #include <config.h>
   4
   5 #include "netdissect-stdinc.h"
   6
   7 #define ND_LONGJMP_FROM_TCHECK
   8 #include "netdissect.h"
   9 #include "extract.h"
  10
  11
  12 typedef struct ipnet_hdr {
  13         nd_uint8_t      iph_version;
  14         nd_uint8_t      iph_family;
  15         nd_uint16_t     iph_htype;
  16         nd_uint32_t     iph_pktlen;
  17         nd_uint32_t     iph_ifindex;
  18         nd_uint32_t     iph_grifindex;
  19         nd_uint32_t     iph_zsrc;
  20         nd_uint32_t     iph_zdst;
  21 } ipnet_hdr_t;
  22
  23 #define IPH_AF_INET     2               /* Matches Solaris's AF_INET */
  24 #define IPH_AF_INET6    26              /* Matches Solaris's AF_INET6 */
  25
  26 #ifdef DLT_IPNET
  27
  28 static const struct tok ipnet_values[] = {
  29         { IPH_AF_INET,          "IPv4" },
  30         { IPH_AF_INET6,         "IPv6" },
  31         { 0,                    NULL }
  32 };
  33
  34 static void
  35 ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
  36 {
  37         const ipnet_hdr_t *hdr;
  38         hdr = (const ipnet_hdr_t *)bp;
  39
  40         ND_PRINT("%u > %u", GET_BE_U_4(hdr->iph_zsrc),
  41                   GET_BE_U_4(hdr->iph_zdst));
  42
  43         if (!ndo->ndo_qflag) {
  44                 ND_PRINT(", family %s (%u)",
  45                           tok2str(ipnet_values, "Unknown",
  46                                   GET_U_1(hdr->iph_family)),
  47                           GET_U_1(hdr->iph_family));
  48         } else {
  49                 ND_PRINT(", %s",
  50                           tok2str(ipnet_values,
  51                                   "Unknown Ethertype (0x%04x)",
  52                                   GET_U_1(hdr->iph_family)));
  53         }
  54
  55         ND_PRINT(", length %u: ", length);
  56 }
  57
  58 static void
  59 ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
  60 {
  61         const ipnet_hdr_t *hdr;
  62
  63         ND_TCHECK_LEN(p, sizeof(ipnet_hdr_t));
  64         ndo->ndo_ll_hdr_len += sizeof(ipnet_hdr_t);
  65
  66         if (ndo->ndo_eflag)
  67                 ipnet_hdr_print(ndo, p, length);
  68
  69         length -= sizeof(ipnet_hdr_t);
  70         caplen -= sizeof(ipnet_hdr_t);
  71         hdr = (const ipnet_hdr_t *)p;
  72         p += sizeof(ipnet_hdr_t);
  73
  74         switch (GET_U_1(hdr->iph_family)) {
  75
  76         case IPH_AF_INET:
  77                 ip_print(ndo, p, length);
  78                 break;
  79
  80         case IPH_AF_INET6:
  81                 ip6_print(ndo, p, length);
  82                 break;
  83
  84         default:
  85                 if (!ndo->ndo_eflag)
  86                         ipnet_hdr_print(ndo, (const u_char *)hdr,
  87                                         length + sizeof(ipnet_hdr_t));
  88
  89                 if (!ndo->ndo_suppress_default_print)
  90                         ND_DEFAULTPRINT(p, caplen);
  91                 break;
  92         }
  93 }
  94
  95 /*
  96  * This is the top level routine of the printer.  'p' points
  97  * to the ether header of the packet, 'h->ts' is the timestamp,
  98  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  99  * is the number of bytes actually captured.
 100  */
 101 void
 102 ipnet_if_print(netdissect_options *ndo,
 103                const struct pcap_pkthdr *h, const u_char *p)
 104 {
 105         ndo->ndo_protocol = "ipnet";
 106         ipnet_print(ndo, p, h->len, h->caplen);
 107 }
 108 #endif /* DLT_IPNET */