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

   1 /* \summary: Solaris DLT_IPNET printer */
   2
   3 #ifdef HAVE_CONFIG_H
   4 #include <config.h>
   5 #endif
   6
   7 #include "netdissect-stdinc.h"
   8
   9 #define ND_LONGJMP_FROM_TCHECK
  10 #include "netdissect.h"
  11 #include "extract.h"
  12
  13
  14 typedef struct ipnet_hdr {
  15         nd_uint8_t      iph_version;
  16         nd_uint8_t      iph_family;
  17         nd_uint16_t     iph_htype;
  18         nd_uint32_t     iph_pktlen;
  19         nd_uint32_t     iph_ifindex;
  20         nd_uint32_t     iph_grifindex;
  21         nd_uint32_t     iph_zsrc;
  22         nd_uint32_t     iph_zdst;
  23 } ipnet_hdr_t;
  24
  25 #define IPH_AF_INET     2               /* Matches Solaris's AF_INET */
  26 #define IPH_AF_INET6    26              /* Matches Solaris's AF_INET6 */
  27
  28 #ifdef DLT_IPNET
  29
  30 static const struct tok ipnet_values[] = {
  31         { IPH_AF_INET,          "IPv4" },
  32         { IPH_AF_INET6,         "IPv6" },
  33         { 0,                    NULL }
  34 };
  35
  36 static void
  37 ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
  38 {
  39         const ipnet_hdr_t *hdr;
  40         hdr = (const ipnet_hdr_t *)bp;
  41
  42         ND_PRINT("%u > %u", GET_BE_U_4(hdr->iph_zsrc),
  43                   GET_BE_U_4(hdr->iph_zdst));
  44
  45         if (!ndo->ndo_qflag) {
  46                 ND_PRINT(", family %s (%u)",
  47                           tok2str(ipnet_values, "Unknown",
  48                                   GET_U_1(hdr->iph_family)),
  49                           GET_U_1(hdr->iph_family));
  50         } else {
  51                 ND_PRINT(", %s",
  52                           tok2str(ipnet_values,
  53                                   "Unknown Ethertype (0x%04x)",
  54                                   GET_U_1(hdr->iph_family)));
  55         }
  56
  57         ND_PRINT(", length %u: ", length);
  58 }
  59
  60 static void
  61 ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
  62 {
  63         const ipnet_hdr_t *hdr;
  64
  65         ND_TCHECK_LEN(p, sizeof(ipnet_hdr_t));
  66         ndo->ndo_ll_hdr_len += sizeof(ipnet_hdr_t);
  67
  68         if (ndo->ndo_eflag)
  69                 ipnet_hdr_print(ndo, p, length);
  70
  71         length -= sizeof(ipnet_hdr_t);
  72         caplen -= sizeof(ipnet_hdr_t);
  73         hdr = (const ipnet_hdr_t *)p;
  74         p += sizeof(ipnet_hdr_t);
  75
  76         switch (GET_U_1(hdr->iph_family)) {
  77
  78         case IPH_AF_INET:
  79                 ip_print(ndo, p, length);
  80                 break;
  81
  82         case IPH_AF_INET6:
  83                 ip6_print(ndo, p, length);
  84                 break;
  85
  86         default:
  87                 if (!ndo->ndo_eflag)
  88                         ipnet_hdr_print(ndo, (const u_char *)hdr,
  89                                         length + sizeof(ipnet_hdr_t));
  90
  91                 if (!ndo->ndo_suppress_default_print)
  92                         ND_DEFAULTPRINT(p, caplen);
  93                 break;
  94         }
  95 }
  96
  97 /*
  98  * This is the top level routine of the printer.  'p' points
  99  * to the ether header of the packet, 'h->ts' is the timestamp,
 100  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 101  * is the number of bytes actually captured.
 102  */
 103 void
 104 ipnet_if_print(netdissect_options *ndo,
 105                const struct pcap_pkthdr *h, const u_char *p)
 106 {
 107         ndo->ndo_protocol = "ipnet";
 108         ipnet_print(ndo, p, h->len, h->caplen);
 109 }
 110 #endif /* DLT_IPNET */