| 1 | #include <stdio.h> |
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| 2 | #include <assert.h> |
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| 3 | #include "libtrace.h" |
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| 4 | #include <map> |
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| 5 | #include <sys/socket.h> |
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| 6 | #include <netinet/ip.h> |
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| 7 | #include <arpa/inet.h> |
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| 8 | |
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| 9 | typedef std::map<uint32_t,std::pair<uint64_t,uint64_t> > ip2with_t; |
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| 10 | ip2with_t ip2with; |
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| 11 | |
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| 12 | struct libtrace_packet_t packet; |
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| 13 | |
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| 14 | /** parse an option |
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| 15 | * @param ptr the pointer to the current option |
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| 16 | * @param plen the length of the remaining buffer |
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| 17 | * @param type the type of the option |
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| 18 | * @param optlen the length of the option |
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| 19 | * @param data the data of the option |
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| 20 | * |
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| 21 | * @returns bool true if there is another option (and the fields are filled in) |
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| 22 | */ |
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| 23 | int get_next_option(unsigned char **ptr,int *len, |
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| 24 | unsigned char *type, |
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| 25 | unsigned char *optlen, |
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| 26 | unsigned char **data) |
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| 27 | { |
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| 28 | if (*len<=0) { |
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| 29 | // printf("Missing End of Options\n"); |
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| 30 | return 0; |
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| 31 | } |
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| 32 | *type=**ptr; |
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| 33 | switch(*type) { |
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| 34 | case 0: /* End of options */ |
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| 35 | // printf("End of option\n"); |
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| 36 | return 0; |
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| 37 | case 1: /* Pad */ |
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| 38 | (*ptr)++; |
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| 39 | (*len)--; |
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| 40 | return 1; |
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| 41 | default: |
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| 42 | case 6: // ECHO (obsolete) |
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| 43 | case 7: // ECHO Reply (obsolete) |
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| 44 | case 9: // Partial ordering |
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| 45 | case 10: // Partial ordering service profile |
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| 46 | case 11: // CC |
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| 47 | case 13: // CC.ECHO |
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| 48 | case 14: // Alternative checksum request |
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| 49 | case 15: // Alternative checksum data |
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| 50 | case 16: // Skeeter |
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| 51 | case 17: // Bubba |
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| 52 | case 18: // Trailer checksum |
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| 53 | case 19: // Md5 signature |
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| 54 | case 20: // SCPS capability |
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| 55 | case 21: // Selective NACK |
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| 56 | case 22: // Record boundary |
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| 57 | case 23: // Corruption experienced |
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| 58 | case 24: // SNAP |
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| 59 | case 25: // Unassigned |
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| 60 | case 26: // TCP Compression filter |
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| 61 | printf("Unknown option type (%i)\n",*type); |
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| 62 | case 2: // MSS |
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| 63 | case 3: // WS |
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| 64 | case 4: // SACK permitted |
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| 65 | case 5: // SACK |
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| 66 | case 8: // Timestamp |
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| 67 | case 12: // CC.new |
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| 68 | *optlen = *(*ptr+1); |
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| 69 | if (*optlen<2) { |
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| 70 | printf("Optlen <2?! %i\n",*optlen); |
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| 71 | return 0; // I have no idea wtf is going on |
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| 72 | // with these packets |
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| 73 | } |
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| 74 | (*len)-=(unsigned int)*optlen; |
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| 75 | (*data)=(*ptr+2); |
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| 76 | (*ptr)+=*optlen; |
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| 77 | if (*len<0) { |
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| 78 | printf("Option longer than option area (%i > %i)\n",*optlen,*len+*optlen); |
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| 79 | return 0; |
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| 80 | } |
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| 81 | return 1; |
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| 82 | } |
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| 83 | assert(0); |
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| 84 | } |
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| 85 | |
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| 86 | int main(int argc, char *argv[]) |
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| 87 | { |
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| 88 | struct libtrace_t *trace; |
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| 89 | double last = 0; |
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| 90 | |
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| 91 | trace = trace_create(argv[1]); |
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| 92 | |
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| 93 | for (;;) { |
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| 94 | struct libtrace_tcp *tcpptr; |
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| 95 | struct libtrace_ip *ipptr; |
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| 96 | int psize; |
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| 97 | |
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| 98 | if ((psize = trace_read_packet(trace, &packet)) <= 0) { |
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| 99 | break; |
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| 100 | } |
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| 101 | |
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| 102 | ipptr = trace_get_ip(&packet); |
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| 103 | tcpptr = trace_get_tcp(&packet); |
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| 104 | |
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| 105 | if (!tcpptr) |
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| 106 | continue; |
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| 107 | |
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| 108 | if (!tcpptr->syn) |
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| 109 | continue; |
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| 110 | |
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| 111 | double now = trace_get_seconds(&packet); |
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| 112 | |
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| 113 | /* search for the timestamp option */ |
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| 114 | unsigned char *pkt = (unsigned char *)tcpptr + sizeof(*tcpptr); |
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| 115 | //int plen = (packet.size-(pkt-(unsigned char*)packet.buffer)) <? (tcpptr->doff*4-sizeof *tcpptr); |
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| 116 | int plen = (tcpptr->doff*4-sizeof *tcpptr); |
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| 117 | unsigned char type = 0; |
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| 118 | unsigned char optlen = 0; |
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| 119 | unsigned char *data = 0; |
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| 120 | bool flag = false; |
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| 121 | |
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| 122 | |
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| 123 | while (get_next_option(&pkt,&plen,&type,&optlen,&data) != 0) { |
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| 124 | // ignore non timestamp options |
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| 125 | if (type!=8) { |
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| 126 | continue; |
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| 127 | } |
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| 128 | |
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| 129 | flag=true; |
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| 130 | } |
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| 131 | |
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| 132 | if (flag) |
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| 133 | ip2with[ipptr->ip_src.s_addr].first++; |
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| 134 | else |
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| 135 | ip2with[ipptr->ip_src.s_addr].second++; |
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| 136 | |
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| 137 | |
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| 138 | if (now-last>60) { |
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| 139 | |
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| 140 | last=now; |
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| 141 | |
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| 142 | printf("\n"); |
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| 143 | |
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| 144 | for(ip2with_t::const_iterator i=ip2with.begin(); |
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| 145 | i!=ip2with.end(); |
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| 146 | i++) { |
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| 147 | if (i->second.first + i->second.second < 100) |
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| 148 | continue; |
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| 149 | printf("%-16s: %6lli %6lli\n", |
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| 150 | inet_ntoa(*(struct in_addr *)&i->first), |
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| 151 | i->second.first, |
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| 152 | i->second.second); |
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| 153 | } |
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| 154 | |
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| 155 | } |
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| 156 | |
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| 157 | } |
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| 158 | |
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| 159 | return 0; |
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| 160 | } |
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