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#include <netdb.h>
#include <inttypes.h>
#include <lt_inttypes.h>
#include <stdio.h>
#include "libtrace.h"
#include "tracereport.h"
#include "report.h"
struct tcp_opts {
bool mss;
bool sack;
bool winscale;
bool ts;
bool ttcp;
bool other;
};
struct opt_counter {
uint64_t no_options;
uint64_t mss_only;
uint64_t ts_only;
uint64_t ms;
uint64_t mw;
uint64_t msw;
uint64_t mt;
uint64_t all_four;
uint64_t ts_and_sack;
uint64_t wt;
uint64_t tms;
uint64_t tws;
uint64_t tmw;
uint64_t ts_and_another;
uint64_t ttcp;
uint64_t other;
};
struct opt_counter syn_counts = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
struct opt_counter synack_counts = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint64_t total_syns = 0;
uint64_t total_synacks = 0;
static void classify_packet(struct tcp_opts opts, struct opt_counter *counts) {
if (!opts.mss && !opts.sack && !opts.winscale && !opts.ts && !opts.ttcp && !opts.other)
{
counts->no_options ++;
return;
}
if (opts.mss && !opts.sack && !opts.winscale && !opts.ts && !opts.ttcp && !opts.other)
{
counts->mss_only ++;
return;
}
if (!opts.mss && !opts.sack && !opts.winscale && opts.ts && !opts.ttcp && !opts.other)
{
counts->ts_only ++;
return;
}
if (opts.mss && opts.sack && !opts.winscale && !opts.ts)
counts->ms ++;
if (opts.mss && opts.winscale && !opts.sack && !opts.ts)
counts->mw ++;
if (opts.mss && opts.winscale && opts.sack && !opts.ts)
counts->msw ++;
if (opts.mss && opts.ts && !opts.winscale && !opts.sack)
counts->mt ++;
if (opts.ts && opts.sack && !opts.mss && !opts.winscale)
counts->ts_and_sack ++;
if (opts.ts && opts.winscale && !opts.mss && !opts.sack)
counts->wt ++;
if (opts.ts && opts.mss && opts.winscale && !opts.sack)
counts->tmw ++;
if (opts.ts && opts.mss && opts.sack && !opts.winscale)
counts->tms ++;
if (opts.ts && opts.sack && opts.winscale && !opts.mss)
counts->tws ++;
if (opts.mss && opts.sack && opts.winscale && opts.ts) {
counts->all_four ++;
}
if (opts.ts && (opts.mss || opts.winscale || opts.sack)) {
counts->ts_and_another ++;
}
if (opts.ttcp)
counts->ttcp ++;
if (opts.other)
counts->other ++;
}
void synopt_per_packet(struct libtrace_packet_t *packet)
{
struct libtrace_tcp *tcp = trace_get_tcp(packet);
unsigned char *opt_ptr;
libtrace_direction_t dir = trace_get_direction(packet);
int len;
unsigned char type, optlen, *data;
struct tcp_opts opts_seen = {false, false, false, false, false, false};
if(!tcp)
return;
if (!tcp->syn)
return;
if (dir != TRACE_DIR_INCOMING && dir != TRACE_DIR_OUTGOING)
dir = TRACE_DIR_OTHER;
len = tcp->doff * 4 - sizeof(libtrace_tcp_t);
if(len == 0)
return;
opt_ptr = (unsigned char *)tcp + sizeof (libtrace_tcp_t);
while(trace_get_next_option(&opt_ptr,&len,&type,&optlen,&data)){
/* I don't think we need to count NO-OPs */
if (type == 1)
continue;
switch(type) {
case 2:
opts_seen.mss = true;
break;
case 3:
opts_seen.winscale = true;
break;
case 4:
opts_seen.sack = true;
break;
case 5:
opts_seen.sack = true;
break;
case 8:
opts_seen.ts = true;
break;
case 11:
case 12:
case 13:
opts_seen.ttcp = true;
break;
default:
opts_seen.other = true;
}
}
if (tcp->ack) {
total_synacks ++;
classify_packet(opts_seen, &synack_counts);
} else {
total_syns ++;
classify_packet(opts_seen, &syn_counts);
}
}
void synopt_report(void)
{
FILE *out = fopen("tcpopt_syn.rpt", "w");
if (!out) {
perror("fopen");
return;
}
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"No Options",
(double)(syn_counts.no_options) / total_syns * 100.0,
(double)(synack_counts.no_options) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M Only",
(double)(syn_counts.mss_only) / total_syns * 100.0,
(double)(synack_counts.mss_only) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"T Only",
(double)(syn_counts.ts_only) / total_syns * 100.0,
(double)(synack_counts.ts_only) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M and S",
(double)(syn_counts.ms) / total_syns * 100.0,
(double)(synack_counts.ms) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M and W",
(double)(syn_counts.mw) / total_syns * 100.0,
(double)(synack_counts.mw) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M, S and W",
(double)(syn_counts.msw) / total_syns * 100.0,
(double)(synack_counts.msw) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M, T",
(double)(syn_counts.mt) / total_syns * 100.0,
(double)(synack_counts.mt) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"W, T",
(double)(syn_counts.wt) / total_syns * 100.0,
(double)(synack_counts.wt) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"S, T",
(double)(syn_counts.ts_and_sack) / total_syns * 100.0,
(double)(synack_counts.ts_and_sack) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"S, M, T",
(double)(syn_counts.tms) / total_syns * 100.0,
(double)(synack_counts.tms) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"W, M, T",
(double)(syn_counts.tmw) / total_syns * 100.0,
(double)(synack_counts.tmw) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"S, W, T",
(double)(syn_counts.tws) / total_syns * 100.0,
(double)(synack_counts.tws) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"M, S, W and T",
(double)(syn_counts.all_four) / total_syns * 100.0,
(double)(synack_counts.all_four) / total_synacks * 100.0);
//fprintf(out, "%-20s\t%.2f%%\n",
// "T and (M or S or W)",
// (double)(counts.ts_and_another) / total_syns * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"T/TCP",
(double)(syn_counts.ttcp) / total_syns * 100.0,
(double)(synack_counts.ttcp) / total_synacks * 100.0);
fprintf(out, "%-20s\t%.2f%%\t%.2f%%\n",
"Other options",
(double)(syn_counts.other) / total_syns * 100.0,
(double)(synack_counts.other) / total_synacks * 100.0);
fclose(out);
}
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