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 #include "netdissect.h"
  10 #include "extract.h"
  11
  12
  13 typedef struct ipnet_hdr {
  14         nd_uint8_t      iph_version;
  15         nd_uint8_t      iph_family;
  16         nd_uint16_t     iph_htype;
  17         nd_uint32_t     iph_pktlen;
  18         nd_uint32_t     iph_ifindex;
  19         nd_uint32_t     iph_grifindex;
  20         nd_uint32_t     iph_zsrc;
  21         nd_uint32_t     iph_zdst;
  22 } ipnet_hdr_t;
  23
  24 #define IPH_AF_INET     2               /* Matches Solaris's AF_INET */
  25 #define IPH_AF_INET6    26              /* Matches Solaris's AF_INET6 */
  26
  27 #ifdef DLT_IPNET
  28
  29 static const struct tok ipnet_values[] = {
  30         { IPH_AF_INET,          "IPv4" },
  31         { IPH_AF_INET6,         "IPv6" },
  32         { 0,                    NULL }
  33 };
  34
  35 static void
  36 ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
  37 {
  38         const ipnet_hdr_t *hdr;
  39         hdr = (const ipnet_hdr_t *)bp;
  40
  41         ND_TCHECK_SIZE(hdr);
  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         return;
  59 trunc:
  60         nd_print_trunc(ndo);
  61 }
  62
  63 static void
  64 ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
  65 {
  66         const ipnet_hdr_t *hdr;
  67
  68         if (caplen < sizeof(ipnet_hdr_t)) {
  69                 ndo->ndo_ll_header_length += caplen;
  70                 nd_print_trunc(ndo);
  71                 return;
  72         }
  73         ndo->ndo_ll_header_length += sizeof(ipnet_hdr_t);
  74
  75         if (ndo->ndo_eflag)
  76                 ipnet_hdr_print(ndo, p, length);
  77
  78         length -= sizeof(ipnet_hdr_t);
  79         caplen -= sizeof(ipnet_hdr_t);
  80         hdr = (const ipnet_hdr_t *)p;
  81         p += sizeof(ipnet_hdr_t);
  82
  83         switch (GET_U_1(hdr->iph_family)) {
  84
  85         case IPH_AF_INET:
  86                 ip_print(ndo, p, length);
  87                 break;
  88
  89         case IPH_AF_INET6:
  90                 ip6_print(ndo, p, length);
  91                 break;
  92
  93         default:
  94                 if (!ndo->ndo_eflag)
  95                         ipnet_hdr_print(ndo, (const u_char *)hdr,
  96                                         length + sizeof(ipnet_hdr_t));
  97
  98                 if (!ndo->ndo_suppress_default_print)
  99                         ND_DEFAULTPRINT(p, caplen);
 100                 break;
 101         }
 102         return;
 103 }
 104
 105 /*
 106  * This is the top level routine of the printer.  'p' points
 107  * to the ether header of the packet, 'h->ts' is the timestamp,
 108  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 109  * is the number of bytes actually captured.
 110  */
 111 void
 112 ipnet_if_print(netdissect_options *ndo,
 113                const struct pcap_pkthdr *h, const u_char *p)
 114 {
 115         ndo->ndo_protocol = "ipnet";
 116         ipnet_print(ndo, p, h->len, h->caplen);
 117 }
 118 #endif /* DLT_IPNET */