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Added statistics printout and command line option

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This commit is contained in:
frekky 2015-10-04 22:13:47 +08:00
parent 2be624c9a6
commit 41ec2ae79c
3 changed files with 163 additions and 73 deletions
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214
src/client.c
View File

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

3
src/client.h
View File

@ -19,6 +19,7 @@
#define __CLIENT_H__ #define __CLIENT_H__
extern int debug; extern int debug;
extern int stats;
#define PENDING_QUERIES_LENGTH (MAX(windowsize_up, windowsize_down) * 3) #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_handshake(int dns_fd, int raw_mode, int autodetect_frag_size, int fragsize);
int client_tunnel(int tun_fd, int dns_fd); 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 handshake_switch_options(int dns_fd, int lazy, int compression, char denc);
void send_ping(int fd, int ping_response, int ack); void send_ping(int fd, int ping_response, int ack);

11
src/iodine.c
View File

@ -69,7 +69,7 @@ print_usage()
{ {
extern char *__progname; 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] " "[-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] " "[-P password] [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] "
"[-z context] [-F pidfile] topdomain [nameserver1 [nameserver2 [nameserverN ...]]]\n", __progname); "[-z context] [-F pidfile] topdomain [nameserver1 [nameserver2 [nameserverN ...]]]\n", __progname);
@ -110,6 +110,7 @@ help()
fprintf(stderr, "Other options:\n"); fprintf(stderr, "Other options:\n");
fprintf(stderr, " -v to print version info and exit\n"); fprintf(stderr, " -v to print version info and exit\n");
fprintf(stderr, " -h to print this help 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, " -f to keep running in foreground\n");
fprintf(stderr, " -D enable debug mode (add more D's to increase debug level)\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"); fprintf(stderr, " -u name to drop privileges and run as user 'name'\n");
@ -198,6 +199,7 @@ main(int argc, char **argv)
device = NULL; device = NULL;
pidfile = NULL; pidfile = NULL;
debug = 0; debug = 0;
stats = 0;
autodetect_frag_size = 1; autodetect_frag_size = 1;
max_downstream_frag_size = 3072; max_downstream_frag_size = 3072;
@ -230,7 +232,7 @@ main(int argc, char **argv)
__progname++; __progname++;
#endif #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) { switch(choice) {
case '4': case '4':
nameserv_family = AF_INET; nameserv_family = AF_INET;
@ -242,6 +244,11 @@ main(int argc, char **argv)
version(); version();
/* NOTREACHED */ /* NOTREACHED */
break; break;
case 'V':
stats = atoi(optarg);
if (stats < 0)
stats = 0;
break;
case 'f': case 'f':
foreground = 1; foreground = 1;
break; break;