mirror of
https://github.com/yarrick/iodine.git
synced 2024-11-25 11:05:15 +00:00
Added statistics printout and command line option
This commit is contained in:
frekky
parent
2be624c9a6
commit
41ec2ae79c
214
src/client.c
214
src/client.c
@ -60,7 +60,9 @@
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#include "util.h"
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#include "client.h"
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/* Output flags for debug and time between stats update */
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int debug;
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int stats;
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static int running;
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static const char *password;
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@ -98,11 +100,20 @@ static int autodetect_server_timeout;
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static time_t rtt_total_ms;
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static size_t num_immediate;
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/* Query statistics */
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/* Connection statistics */
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static size_t num_timeouts;
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static size_t num_untracked;
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static size_t send_query_sendcnt = -1;
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static size_t send_query_recvcnt = -1;
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static size_t num_servfail;
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static size_t num_badip;
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static size_t num_init_queries;
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static size_t num_sent;
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static size_t num_recv;
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static size_t send_query_sendcnt = 0;
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static size_t send_query_recvcnt = 0;
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static size_t num_frags_sent;
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static size_t num_frags_recv;
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static size_t num_pings;
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/* My userid at the server */
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static char userid;
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@ -169,6 +180,9 @@ client_init()
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maxfragsize_up = 100;
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num_immediate = 1;
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rtt_total_ms = 1000;
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outbuf = NULL;
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inbuf = NULL;
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pending_queries = NULL;
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@ -322,6 +336,48 @@ client_rotate_nameserver()
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fprintf(stderr, "\n");\
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}
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static void
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update_server_timeout(int dns_fd, int handshake)
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/* Calculate server timeout based on average RTT, send ping "handshake" to set */
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{
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time_t rtt_ms;
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static size_t num_rtt_timeouts = 0;
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/* Get average RTT in ms */
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rtt_ms = rtt_total_ms / num_immediate;
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if (rtt_ms >= max_timeout_ms) {
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num_rtt_timeouts++;
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if (num_rtt_timeouts < 3) {
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fprintf(stderr, "Target interval of %ld ms less than average round-trip of "
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"%ld ms! Try increasing interval with -I.\n", max_timeout_ms, rtt_ms);
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} else {
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max_timeout_ms = server_timeout_ms;
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if (server_timeout_ms > rtt_ms) {
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server_timeout_ms -= rtt_ms;
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if (lazymode)
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fprintf(stderr, "Adjusting server timeout to %ld ms, target interval %ld ms.\n",
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server_timeout_ms, max_timeout_ms);
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} else {
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server_timeout_ms = 0;
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fprintf(stderr, "Switching off lazy mode to keep timeouts below target interval (%ld ms).",
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max_timeout_ms);
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handshake_switch_options(dns_fd, 0, compression_down, downenc);
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}
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num_rtt_timeouts = 0;
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}
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} else {
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/* Set server timeout based on target interval and RTT */
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server_timeout_ms = max_timeout_ms - rtt_ms;
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}
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if (!handshake)
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return;
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/* Send ping handshake to set server timeout/lazymode */
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send_ping(dns_fd, 1, -1);
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}
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static void
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check_pending_queries()
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/* Updates pending queries list */
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@ -330,7 +386,7 @@ check_pending_queries()
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struct timeval now, qtimeout, max_timeout;
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gettimeofday(&now, NULL);
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/* Max timeout for queries is max interval + 1 second extra */
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max_timeout = ms_to_timeval(max_timeout_ms);
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max_timeout = ms_to_timeval(max_timeout_ms + 1000);
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for (int i = 0; i < PENDING_QUERIES_LENGTH; i++) {
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if (pending_queries[i].time.tv_sec > 0 && pending_queries[i].id >= 0) {
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timeradd(&pending_queries[i].time, &max_timeout, &qtimeout);
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@ -383,11 +439,9 @@ query_sent_now(int id)
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}
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static void
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got_response(int id, int immediate)
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got_response(int id, int immediate, int dns_fd)
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{
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struct timeval now, rtt;
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time_t rtt_ms;
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static size_t num_rtt_timeouts;
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gettimeofday(&now, NULL);
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QTRACK_DEBUG(4, "Got answer id %d (%s)", id, immediate ? "immediate" : "lazy");
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@ -412,25 +466,8 @@ got_response(int id, int immediate)
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rtt_total_ms += timeval_to_ms(&rtt);
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num_immediate++;
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if (autodetect_server_timeout) {
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/* Get average RTT in ms */
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rtt_ms = rtt_total_ms / num_immediate;
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if (rtt_ms >= max_timeout_ms) {
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num_rtt_timeouts++;
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if (num_rtt_timeouts < 3) {
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fprintf(stderr, "Preferred interval of %lu ms less than average round-trip of "
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"%lu ms! Try increasing interval with -I.\n", max_timeout_ms, rtt_ms);
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} else {
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server_timeout_ms = max_timeout_ms;
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max_timeout_ms += rtt_ms;
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if (lazymode)
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fprintf(stderr, "Adjusting server timeout to %lu ms.\n", server_timeout_ms);
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num_rtt_timeouts = 0;
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}
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} else {
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server_timeout_ms = max_timeout_ms - rtt_ms;
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}
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}
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if (autodetect_server_timeout)
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update_server_timeout(dns_fd, 0);
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}
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/* Remove query info from buffer to mark it as answered */
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@ -487,29 +524,32 @@ send_query(int fd, uint8_t *hostname)
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(Can't very well do this anywhere else; this is the only place
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we'll reliably get to in such situations.) */
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num_sent++;
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if (send_query_sendcnt >= 0 && send_query_sendcnt < 100 && lazymode) {
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send_query_sendcnt++;
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if ((send_query_sendcnt > 6 && send_query_recvcnt <= 0) ||
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(send_query_sendcnt > 10 && 4 * send_query_recvcnt < send_query_sendcnt)) {
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if (server_timeout_ms > 500 && autodetect_server_timeout) {
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server_timeout_ms -= 200;
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double secs = (double) server_timeout_ms / 1000.0;
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fprintf(stderr, "Receiving too few answers. Setting server timeout to %fs (-I%f)\n", secs, secs);
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if ((send_query_sendcnt > windowsize_down && send_query_recvcnt <= 0) ||
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(send_query_sendcnt > 2 * windowsize_down && 4 * send_query_recvcnt < send_query_sendcnt)) {
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if (max_timeout_ms > 500 && autodetect_server_timeout) {
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max_timeout_ms -= 500;
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double secs = (double) max_timeout_ms / 1000.0;
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fprintf(stderr, "Receiving too few answers. Setting target timeout to %.1fs (-I%.1f)\n", secs, secs);
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/* restart counting */
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send_query_sendcnt = 0;
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send_query_recvcnt = 0;
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if (rtt_total_ms / num_immediate < 1000) {
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rtt_total_ms = 1000;
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num_immediate = 1;
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/* TODO: reduce windowsize due to DNS server dropping queries */
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send_ping(fd, 1, -1);
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}
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} else if (lazymode && autodetect_server_timeout) {
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fprintf(stderr, "Receiving too few answers. Will try to switch lazy mode off, but that may not"
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" always work any more. Start with -L0 next time on this network.");
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lazymode = 0;
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server_timeout_ms = 0;
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handshake_switch_options(fd, 0, compression_down, downenc);
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}
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update_server_timeout(fd, 1);
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}
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}
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return q.id;
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@ -558,6 +598,7 @@ send_packet(int fd, char cmd, const uint8_t *data, const size_t datalen)
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void
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send_ping(int fd, int ping_response, int ack)
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{
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num_pings++;
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if (conn == CONN_DNS_NULL) {
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uint8_t data[11];
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int id;
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@ -651,6 +692,7 @@ send_next_frag(int fd)
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query_sent_now(id);
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window_tick(outbuf);
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num_frags_sent++;
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}
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static void
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@ -899,7 +941,7 @@ read_dns_withq(int dns_fd, int tun_fd, uint8_t *buf, size_t buflen, struct query
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}
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}
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static int
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int
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handshake_waitdns(int dns_fd, char *buf, size_t buflen, char cmd, int timeout)
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/* Wait for DNS reply fitting to our latest query and returns it.
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Returns length of reply = #bytes used in buf.
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@ -985,7 +1027,7 @@ handshake_waitdns(int dns_fd, char *buf, size_t buflen, char cmd, int timeout)
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return -1;
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}
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static int
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int
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parse_data(uint8_t *data, size_t len, fragment *f, int *immediate)
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{
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size_t headerlen = DOWNSTREAM_HDR;
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@ -1011,7 +1053,6 @@ parse_data(uint8_t *data, size_t len, fragment *f, int *immediate)
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if (len < headerlen) return -1; /* invalid packet - continue */
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/* Parse data/ping header */
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/* TODO: do something with wsize/start params in ping */
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dn_wsize = data[3];
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up_wsize = data[4];
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dn_start_seq = data[5];
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@ -1072,11 +1113,9 @@ tunnel_tun(int tun_fd, int dns_fd)
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static int
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tunnel_dns(int tun_fd, int dns_fd)
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{
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static long packrecv = 0;
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static long packrecv_servfail = 0;
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static struct query q;
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size_t datalen, buflen;
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static uint8_t buf[64*1024], cbuf[64*1024];
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static uint8_t buf[64*1024], cbuf[64*1024], *data;
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static fragment f;
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int read, compressed, res, immediate;
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@ -1106,25 +1145,28 @@ tunnel_dns(int tun_fd, int dns_fd)
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if (read < 0)
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write_dns_error(&q, 0);
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if (read < 0 && q.rcode == SERVFAIL && lazymode && server_timeout_ms > 500) {
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if (packrecv < 500 && packrecv_servfail < 4) {
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packrecv_servfail++;
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fprintf(stderr, "Hmm, that's %ld SERVFAILs. Your data should still go through...", packrecv_servfail);
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} else if (packrecv < 500 && packrecv_servfail >= 4 && autodetect_server_timeout) {
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packrecv_servfail++;
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if (read < 0 && q.rcode == SERVFAIL && lazymode && max_timeout_ms > 500) {
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num_servfail++;
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if (send_query_recvcnt < 500 && num_servfail < 4) {
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fprintf(stderr, "Hmm, that's %ld SERVFAILs. Your data should still go through...", num_servfail);
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} else if (send_query_recvcnt < 500 && num_servfail >= 4 && autodetect_server_timeout) {
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server_timeout_ms -= 500;
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double server_timeout = (float) server_timeout_ms / 1000.0;
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fprintf(stderr, "%ld SERVFAILs is too many. Setting server timeout to %f to hopefully reduce SERVFAILs."
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" But just ignore them if data still comes through. (Use -I%f next time on this network.)",
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packrecv_servfail, server_timeout, server_timeout);
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fprintf(stderr, "Exceeded acceptable limit for SERVFAILs (%ld), setting "
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"timeout to %.1f secs. (use -I%.1f next time on this network)\n",
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num_servfail, server_timeout, server_timeout);
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/* Reset query counts stats */
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send_query_sendcnt = 0;
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send_query_recvcnt = 0;
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if (rtt_total_ms / num_immediate < 1000) {
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/* only reset avg RTT if it might be too small (TODO trust the statistics) */
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rtt_total_ms = 1000;
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num_immediate = 1;
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send_ping(dns_fd, 0, -1);
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} else if (packrecv >= 500 && packrecv_servfail > 0) {
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fprintf(stderr, "(Sorry, stopped counting; try -I1 if you experience hiccups.)");
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packrecv_servfail = 0;
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}
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update_server_timeout(dns_fd, 1);
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}
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}
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@ -1133,18 +1175,19 @@ tunnel_dns(int tun_fd, int dns_fd)
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}
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if (read == 5 && !strncmp("BADIP", (char *)cbuf, 5)) {
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fprintf(stderr, "BADIP: Server rejected sender IP address (maybe iodined -c will help), or server "
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"kicked us due to timeout. Will exit if no downstream data is received in 60 seconds.");
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num_badip++;
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if (num_badip % 5 == 1) {
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fprintf(stderr, "BADIP (%ld): Server rejected sender IP address (maybe iodined -c will help), or server "
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"kicked us due to timeout. Will exit if no downstream data is received in 60 seconds.", num_badip);
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}
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return -1; /* nothing done */
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}
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/* Okay, we have a recent downstream packet */
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lastdownstreamtime = time(NULL);
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if (!(packrecv & 0x10000000))
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packrecv++;
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send_query_recvcnt++; /* overflow doesn't matter */
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send_query_recvcnt++; /* unlikely we will ever overflow (2^64 queries is a LOT) */
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num_recv++;
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/* Decode the downstream data header and fragment-ify ready for processing */
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res = parse_data(cbuf, read, &f, &immediate);
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@ -1153,7 +1196,7 @@ tunnel_dns(int tun_fd, int dns_fd)
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res ? "PING" : "DATA", f.seqID, f.ack_other, f.compressed, f.len, f.start, f.end);
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/* Mark query as received */
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got_response(q.id, immediate);
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got_response(q.id, immediate, dns_fd);
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window_ack(outbuf, f.ack_other);
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window_tick(outbuf);
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@ -1185,6 +1228,8 @@ tunnel_dns(int tun_fd, int dns_fd)
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/* Downstream data traffic + get ack for that data */
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next_downstream_ack = window_process_incoming_fragment(inbuf, &f);
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num_frags_recv++;
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datalen = window_reassemble_data(inbuf, cbuf, sizeof(cbuf), &compressed);
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if (datalen > 0) {
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if (compressed) {
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@ -1196,10 +1241,13 @@ tunnel_dns(int tun_fd, int dns_fd)
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} else {
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datalen = buflen;
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}
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data = buf;
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} else {
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data = cbuf;
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}
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if (datalen)
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write_tun(tun_fd, buf, datalen);
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write_tun(tun_fd, data, datalen);
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}
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/* Move window along after doing all data processing */
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@ -1216,6 +1264,7 @@ client_tunnel(int tun_fd, int dns_fd)
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int rv;
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int i;
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int sending;
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time_t last_stats;
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if (conn != CONN_DNS_NULL) {
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compression_up = 1;
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@ -1225,6 +1274,9 @@ client_tunnel(int tun_fd, int dns_fd)
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/* Incoming buffer max fragsize doesn't matter */
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inbuf = window_buffer_init(64, windowsize_down, MAX_FRAGSIZE, WINDOW_RECVING);
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/* init query tracking */
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num_untracked = 0;
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num_pending = 0;
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pending_queries = calloc(PENDING_QUERIES_LENGTH, sizeof(struct query_tuple));
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for (int i = 0; i < PENDING_QUERIES_LENGTH; i++)
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pending_queries[i].id = -1;
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@ -1232,13 +1284,22 @@ client_tunnel(int tun_fd, int dns_fd)
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/* start counting now */
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rv = 0;
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lastdownstreamtime = time(NULL);
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last_stats = time(NULL);
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rtt_total_ms = 1000;
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num_immediate = 1;
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/* reset connection statistics */
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num_init_queries = MAX(send_query_recvcnt, send_query_sendcnt);
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num_badip = 0;
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num_servfail = 0;
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num_timeouts = 0;
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num_untracked = 0;
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num_pending = 0;
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send_query_recvcnt = 0;
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send_query_sendcnt = 0;
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num_sent = 0;
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num_recv = 0;
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num_frags_sent = 0;
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num_frags_recv = 0;
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num_pings = 0;
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if (debug >= 5)
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window_debug = debug - 3;
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@ -1246,8 +1307,7 @@ client_tunnel(int tun_fd, int dns_fd)
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while (running) {
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tv = ms_to_timeval(max_timeout_ms);
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/* TODO: adjust min send interval based on DNS server droppiness
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* (eg. from sending lots of requests simultaneously)
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/* TODO: detect DNS servers which drop frequent requests
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* TODO: adjust number of pending queries based on current data rate */
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sending = window_sending(outbuf);
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check_pending_queries();
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@ -1268,6 +1328,26 @@ client_tunnel(int tun_fd, int dns_fd)
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send_ping_soon = 0;
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}
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if (stats) {
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if (difftime(time(NULL), last_stats) >= stats) {
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/* print useful statistics report */
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fprintf(stderr, "\n========== iodine connection statistics (user %1d) ==========\n", userid);
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fprintf(stderr, " Queries sent: %8lu" " answered: %8lu" " SERVFAILs: %4lu\n",
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num_sent, num_recv, num_servfail);
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fprintf(stderr, " during init: %4lu IP rejected: %4lu untracked: %4lu\n",
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num_init_queries, num_badip, num_untracked);
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fprintf(stderr, " Average round-trip time: %4ld ms immediate answers: %5lu\n",
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rtt_total_ms / num_immediate, num_immediate);
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fprintf(stderr, " query timeouts: %4lu target: %4ld ms server: %4ld ms\n",
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num_timeouts, max_timeout_ms, server_timeout_ms);
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fprintf(stderr, " Resent fragments up: %4u downstream out of window: %4u\n",
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outbuf->resends, inbuf->oos);
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fprintf(stderr, " TX fragments: %8lu" " RX: %8lu" " pings: %8lu" "\n\n",
|
||||
num_frags_sent, num_frags_recv, num_pings);
|
||||
last_stats = time(NULL);
|
||||
}
|
||||
}
|
||||
|
||||
if (send_ping_soon) {
|
||||
tv.tv_sec = 0;
|
||||
tv.tv_usec = send_ping_soon * 1000;
|
||||
@ -1284,7 +1364,7 @@ client_tunnel(int tun_fd, int dns_fd)
|
||||
i = select(MAX(tun_fd, dns_fd) + 1, &fds, NULL, NULL, &tv);
|
||||
|
||||
if (difftime(time(NULL), lastdownstreamtime) > 60) {
|
||||
warnx("No downstream data received in 60 seconds, shutting down.");
|
||||
fprintf(stderr, "No downstream data received in 60 seconds, shutting down.\n");
|
||||
running = 0;
|
||||
}
|
||||
|
||||
|
||||
@ -19,6 +19,7 @@
|
||||
#define __CLIENT_H__
|
||||
|
||||
extern int debug;
|
||||
extern int stats;
|
||||
|
||||
#define PENDING_QUERIES_LENGTH (MAX(windowsize_up, windowsize_down) * 3)
|
||||
|
||||
@ -49,6 +50,8 @@ void client_set_hostname_maxlen(size_t i);
|
||||
int client_handshake(int dns_fd, int raw_mode, int autodetect_frag_size, int fragsize);
|
||||
int client_tunnel(int tun_fd, int dns_fd);
|
||||
|
||||
int parse_data(uint8_t *data, size_t len, fragment *f, int *immediate);
|
||||
int handshake_waitdns(int dns_fd, char *buf, size_t buflen, char cmd, int timeout);
|
||||
void handshake_switch_options(int dns_fd, int lazy, int compression, char denc);
|
||||
void send_ping(int fd, int ping_response, int ack);
|
||||
|
||||
|
||||
11
src/iodine.c
11
src/iodine.c
@ -69,7 +69,7 @@ print_usage()
|
||||
{
|
||||
extern char *__progname;
|
||||
|
||||
fprintf(stderr, "Usage: %s [-v] [-h] [-f] [-r] [-u user] [-t chrootdir] [-d device] "
|
||||
fprintf(stderr, "Usage: %s [-v] [-h] [-V sec] [-f] [-r] [-u user] [-t chrootdir] [-d device] "
|
||||
"[-w downfrags] [-W upfrags] [-i sec] [-I sec] [-c 0|1] [-C 0|1] "
|
||||
"[-P password] [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] "
|
||||
"[-z context] [-F pidfile] topdomain [nameserver1 [nameserver2 [nameserverN ...]]]\n", __progname);
|
||||
@ -110,6 +110,7 @@ help()
|
||||
fprintf(stderr, "Other options:\n");
|
||||
fprintf(stderr, " -v to print version info and exit\n");
|
||||
fprintf(stderr, " -h to print this help and exit\n");
|
||||
fprintf(stderr, " -V sec to print connection statistics at specified intervals\n");
|
||||
fprintf(stderr, " -f to keep running in foreground\n");
|
||||
fprintf(stderr, " -D enable debug mode (add more D's to increase debug level)\n");
|
||||
fprintf(stderr, " -u name to drop privileges and run as user 'name'\n");
|
||||
@ -198,6 +199,7 @@ main(int argc, char **argv)
|
||||
device = NULL;
|
||||
pidfile = NULL;
|
||||
debug = 0;
|
||||
stats = 0;
|
||||
|
||||
autodetect_frag_size = 1;
|
||||
max_downstream_frag_size = 3072;
|
||||
@ -230,7 +232,7 @@ main(int argc, char **argv)
|
||||
__progname++;
|
||||
#endif
|
||||
|
||||
while ((choice = getopt(argc, argv, "46vfDhrcCu:t:d:R:P:w:W:m:M:F:T:O:L:I:")) != -1) {
|
||||
while ((choice = getopt(argc, argv, "46vfDhrV:c:C:i:u:t:d:R:P:w:W:m:M:F:T:O:L:I:")) != -1) {
|
||||
switch(choice) {
|
||||
case '4':
|
||||
nameserv_family = AF_INET;
|
||||
@ -242,6 +244,11 @@ main(int argc, char **argv)
|
||||
version();
|
||||
/* NOTREACHED */
|
||||
break;
|
||||
case 'V':
|
||||
stats = atoi(optarg);
|
||||
if (stats < 0)
|
||||
stats = 0;
|
||||
break;
|
||||
case 'f':
|
||||
foreground = 1;
|
||||
break;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user