1 | #include <sys/types.h> |
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2 | #include <sys/socket.h> |
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3 | #include <netinet/in.h> |
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4 | #include <stdio.h> |
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5 | #include "libpacketdump.h" |
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6 | #ifndef WIN32 |
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7 | #include <netinet/in_systm.h> |
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8 | #endif |
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9 | #include <arpa/inet.h> |
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10 | #include <netdb.h> |
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11 | |
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12 | #define DISPLAY_EXP(x,fmt,exp) \ |
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13 | if ((unsigned int)len>=((char*)&ip->x-(char*)ip+sizeof(ip->x))) \ |
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14 | printf(fmt,exp); \ |
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15 | else \ |
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16 | return; |
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17 | |
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18 | #define DISPLAY(x,fmt) DISPLAY_EXP(x,fmt,ip->x) |
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19 | |
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20 | #define DISPLAYS(x,fmt) DISPLAY_EXP(x,fmt,htons(ip->x)) |
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21 | #define DISPLAYIP(x,fmt) DISPLAY_EXP(x,fmt,inet_ntoa(*(struct in_addr*)&ip->x)) |
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22 | |
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23 | void decode(int link_type,char *packet,int len) |
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24 | { |
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25 | libtrace_ip_t *ip = (libtrace_ip_t*)packet; |
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26 | if (len>=1) { |
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27 | printf(" IP: Header Len %i",ip->ip_hl*4); |
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28 | printf(" Ver %i",ip->ip_v); |
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29 | } |
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30 | //DISPLAY(ip_tos," TOS %02x") |
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31 | DISPLAY_EXP(ip_tos," DSCP %02x",ip->ip_tos >> 2) |
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32 | DISPLAY_EXP(ip_tos," ECN %x",ip->ip_tos & 0x2) |
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33 | DISPLAYS(ip_len," Total Length %i") |
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34 | printf("\n IP:"); |
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35 | DISPLAY(ip_id," Id %u"); |
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36 | |
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37 | if ((unsigned int)len >= ((char *)&ip->ip_ttl - (char *)ip - 2)) { |
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38 | printf(" Fragoff %i", ip->ip_off); |
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39 | if (ip->ip_mf) printf(" MORE_FRAG"); |
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40 | if (ip->ip_df) printf(" DONT_FRAG"); |
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41 | if (ip->ip_rf) printf(" RESV_FRAG"); |
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42 | } |
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43 | //printf("\n IP:"); |
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44 | DISPLAY(ip_ttl,"\n IP: TTL %i"); |
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45 | if ((unsigned int)len>=((char*)&ip->ip_p-(char*)ip+sizeof(ip->ip_p))) { |
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46 | struct protoent *ent=getprotobynumber(ip->ip_p); |
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47 | if (ent) { |
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48 | printf(" Proto %i (%s)",ip->ip_p,ent->p_name); |
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49 | } |
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50 | else { |
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51 | printf(" Proto %i",ip->ip_p); |
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52 | } |
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53 | } else { |
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54 | printf("\n"); |
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55 | return; |
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56 | } |
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57 | DISPLAYS(ip_sum," Checksum %i\n"); |
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58 | DISPLAYIP(ip_src," IP: Source %s "); |
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59 | DISPLAYIP(ip_dst,"Destination %s\n"); |
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60 | decode_next(packet+sizeof(*ip),len-sizeof(*ip),"ip",ip->ip_p); |
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61 | return; |
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62 | } |
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