1 | /* |
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2 | * Linux SLL Decoder |
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3 | * |
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4 | */ |
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5 | |
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6 | #include <sys/types.h> |
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7 | #include <netinet/in.h> |
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8 | #include <stdio.h> |
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9 | #include "libpacketdump.h" |
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10 | #include "libtrace.h" |
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11 | #include "libtrace_int.h" |
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12 | |
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13 | DLLEXPORT void decode(int link_type UNUSED,const char *pkt,unsigned len) |
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14 | { |
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15 | libtrace_sll_header_t *sll = (libtrace_sll_header_t *) pkt; |
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16 | uint16_t type; |
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17 | |
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18 | if (len < sizeof(*sll)) { |
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19 | printf(" Linux SLL: Truncated (len = %u)\n", len); |
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20 | return; |
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21 | } |
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22 | |
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23 | printf(" Linux SLL: Packet Type = "); |
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24 | switch(ntohs(sll->pkttype)) { |
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25 | case TRACE_SLL_HOST: printf("HOST\n"); break; |
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26 | case TRACE_SLL_BROADCAST: printf("BROADCAST\n"); break; |
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27 | case TRACE_SLL_MULTICAST: printf("MULTICAST\n"); break; |
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28 | case TRACE_SLL_OTHERHOST: printf("OTHERHOST\n"); break; |
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29 | case TRACE_SLL_OUTGOING: printf("OUTGOING\n"); break; |
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30 | default: printf("Unknown (0x%04x)\n", ntohs(sll->pkttype)); |
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31 | } |
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32 | |
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33 | printf(" Linux SLL: Hardware Address Type = 0x%04x\n", ntohs(sll->hatype)); |
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34 | printf(" Linux SLL: Hardware Address Length = %u\n", ntohs(sll->halen)); |
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35 | printf(" Linux SLL: Hardware Address = %s\n", trace_ether_ntoa( (sll->addr), NULL)); |
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36 | |
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37 | printf(" Linux SLL: Protocol = 0x%04x\n", ntohs(sll->protocol)); |
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38 | |
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39 | /* Decide how to continue processing... */ |
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40 | |
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41 | /* Do we recognise the hardware address type? */ |
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42 | type = arphrd_type_to_libtrace(ntohs(sll->hatype)); |
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43 | if (type != 65535) { |
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44 | decode_next(pkt + sizeof(*sll), len - sizeof(*sll), "link", type); |
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45 | return; |
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46 | } |
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47 | |
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48 | /* Meh.. pass it off to eth decoder */ |
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49 | decode_next(pkt + sizeof(*sll), len - sizeof(*sll), "eth", ntohs(sll->protocol)); |
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50 | |
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51 | } |
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52 | |
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53 | |
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