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 static const char tstr[] = "[|ipnet]";
  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_TCHECK_SIZE(hdr);
  43         ND_PRINT("%u > %u", EXTRACT_BE_U_4(hdr->iph_zsrc),
  44                   EXTRACT_BE_U_4(hdr->iph_zdst));
  45
  46         if (!ndo->ndo_qflag) {
  47                 ND_PRINT(", family %s (%u)",
  48                           tok2str(ipnet_values, "Unknown",
  49                                   EXTRACT_U_1(hdr->iph_family)),
  50                           EXTRACT_U_1(hdr->iph_family));
  51         } else {
  52                 ND_PRINT(", %s",
  53                           tok2str(ipnet_values,
  54                                   "Unknown Ethertype (0x%04x)",
  55                                   EXTRACT_U_1(hdr->iph_family)));
  56         }
  57
  58         ND_PRINT(", length %u: ", length);
  59         return;
  60 trunc:
  61         ND_PRINT(" %s", tstr);
  62 }
  63
  64 static void
  65 ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
  66 {
  67         const ipnet_hdr_t *hdr;
  68
  69         ndo->ndo_protocol = "ipnet";
  70         if (caplen < sizeof(ipnet_hdr_t))
  71                 goto trunc;
  72
  73         if (ndo->ndo_eflag)
  74                 ipnet_hdr_print(ndo, p, length);
  75
  76         length -= sizeof(ipnet_hdr_t);
  77         caplen -= sizeof(ipnet_hdr_t);
  78         hdr = (const ipnet_hdr_t *)p;
  79         p += sizeof(ipnet_hdr_t);
  80
  81         ND_TCHECK_1(hdr->iph_family);
  82         switch (EXTRACT_U_1(hdr->iph_family)) {
  83
  84         case IPH_AF_INET:
  85                 ip_print(ndo, p, length);
  86                 break;
  87
  88         case IPH_AF_INET6:
  89                 ip6_print(ndo, p, length);
  90                 break;
  91
  92         default:
  93                 if (!ndo->ndo_eflag)
  94                         ipnet_hdr_print(ndo, (const u_char *)hdr,
  95                                         length + sizeof(ipnet_hdr_t));
  96
  97                 if (!ndo->ndo_suppress_default_print)
  98                         ND_DEFAULTPRINT(p, caplen);
  99                 break;
 100         }
 101         return;
 102 trunc:
 103         ND_PRINT(" %s", tstr);
 104 }
 105
 106 /*
 107  * This is the top level routine of the printer.  'p' points
 108  * to the ether header of the packet, 'h->ts' is the timestamp,
 109  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 110  * is the number of bytes actually captured.
 111  */
 112 u_int
 113 ipnet_if_print(netdissect_options *ndo,
 114                const struct pcap_pkthdr *h, const u_char *p)
 115 {
 116         ndo->ndo_protocol = "ipnet_if";
 117         ipnet_print(ndo, p, h->len, h->caplen);
 118
 119         return (sizeof(ipnet_hdr_t));
 120 }
 121 #endif /* DLT_IPNET */