dissector_sll.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * Subject to the GPL, version 2.
   4  */
   5
   6 #include "oui.h"
   7 #include "protos.h"
   8 #include "pcap_io.h"
   9 #include "pkt_buff.h"
  10 #include "dissector.h"
  11 #include "dissector_sll.h"
  12 #include "dissector_eth.h"
  13
  14 static char *pkt_type2str(uint8_t pkttype)
  15 {
  16         switch (pkttype) {
  17         case PACKET_HOST:
  18                 return "host";
  19         case PACKET_BROADCAST:
  20                 return "broadcast";
  21         case PACKET_MULTICAST:
  22                 return "multicast";
  23         case PACKET_OTHERHOST:
  24                 return "other host";
  25         case PACKET_OUTGOING:
  26                 return "outgoing";
  27         case PACKET_USER:
  28                 return "user";
  29         case PACKET_KERNEL:
  30                 return "kernel";
  31         }
  32
  33         return "Unknown";
  34 }
  35
  36 static void sll_print_full(struct pkt_buff *pkt)
  37 {
  38         struct sockaddr_ll *sll = pkt->sll;
  39         char addr_str[40] = {};
  40
  41         tprintf(" [ Linux \"cooked\"");
  42         tprintf(" Pkt Type %d (%s)", sll->sll_pkttype,
  43                 pkt_type2str(sll->sll_pkttype));
  44         tprintf(", If Type %d (%s)", sll->sll_hatype,
  45                 device_type2str(sll->sll_hatype));
  46         tprintf(", Addr Len %d", sll->sll_halen);
  47         tprintf(", Src (%s)", device_addr2str(sll->sll_addr, sll->sll_halen,
  48                 sll->sll_hatype, addr_str, sizeof(addr_str)));
  49         tprintf(", Proto 0x%x", ntohs(sll->sll_protocol));
  50         tprintf(" ]\n");
  51
  52         switch (pcap_devtype_to_linktype(sll->sll_hatype)) {
  53         case LINKTYPE_EN10MB:
  54         case ___constant_swab32(LINKTYPE_EN10MB):
  55                 pkt_set_dissector(pkt, &eth_lay2, ntohs(sll->sll_protocol));
  56                 break;
  57         case LINKTYPE_NETLINK:
  58         case ___constant_swab32(LINKTYPE_NETLINK):
  59                 pkt->dissector = &nlmsg_ops;
  60                 break;
  61         default:
  62                 tprintf(" [ Unknown protocol ]\n");
  63         }
  64 }
  65
  66 static void sll_print_less(struct pkt_buff *pkt)
  67 {
  68         struct sockaddr_ll *sll = pkt->sll;
  69         char addr_str[40] = {};
  70
  71         tprintf(" Pkt Type %d (%s)", sll->sll_pkttype,
  72                 pkt_type2str(sll->sll_pkttype));
  73         tprintf(", If Type %d (%s)", sll->sll_hatype,
  74                 device_type2str(sll->sll_hatype));
  75         tprintf(", Addr Len %d", sll->sll_halen);
  76         tprintf(", Src (%s)", device_addr2str(sll->sll_addr, sll->sll_halen,
  77                 sll->sll_hatype, addr_str, sizeof(addr_str)));
  78         tprintf(", Proto 0x%x", ntohs(sll->sll_protocol));
  79 }
  80
  81 struct protocol sll_ops = {
  82         .key = 0,
  83         .print_full = sll_print_full,
  84         .print_less = sll_print_less,
  85 };
  86
  87 struct protocol *dissector_get_sll_entry_point(void)
  88 {
  89         return &sll_ops;
  90 }
  91
  92 struct protocol *dissector_get_sll_exit_point(void)
  93 {
  94         return &none_ops;
  95 }
  96
  97 void dissector_init_sll(int fnttype)
  98 {
  99         dissector_set_print_type(&sll_ops, fnttype);
 100         dissector_set_print_type(&none_ops, fnttype);
 101         dissector_init_oui();
 102 }
 103
 104 void dissector_cleanup_sll(void)
 105 {
 106         dissector_cleanup_oui();
 107 }