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Added debug capability on server

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Erik Ekman 2008-08-05 22:37:40 +00:00 committed by Erik Ekman
parent 539ebb27d9
commit 025fb1bf1f
3 changed files with 33 additions and 4 deletions
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2
CHANGELOG
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@ -17,6 +17,8 @@ CHANGES:
- Fixed bug #21, now only IP address part of each packet is checked.
Should remove the need for the -c option and also work with
bugfixed DNS servers worldwide.
- Added -D option on server to enable debugging. Debug level 1 now prints
info about each RX/TX datagram.
2007-11-30: 0.4.1 "Tea Online"
- Introduced encoding API

8
man/iodine.8
View file

@ -25,7 +25,7 @@ iodine, iodined \- tunnel IPv4 over DNS
.B iodined [-h]
.B iodined [-c] [-s] [-f] [-u
.B iodined [-c] [-s] [-f] [-D] [-u
.I user
.B ] [-P
.I password
@ -79,13 +79,15 @@ and otherwise tunX.
.SS Server Options:
.TP
.B -c
Disable checks on client IP and port on all incoming requests.
This might help if server is behind a NAT firewall.
Disable checks on client IP on all incoming requests.
.TP
.B -s
Don't try to configure IP address or MTU. This should only be used if
you have already configured the device that will be used.
.TP
.B -D
Increase debug level. Level 1 prints info about each RX/TX packet.
.TP
.B -m mtu
Set 'mtu' as mtu size for the tunnel device. This will be sent to the client
on connect, and the client will use the same mtu.

27
src/iodined.c
View file

@ -57,6 +57,8 @@ static int check_ip;
static int my_mtu;
static in_addr_t my_ip;
static int debug;
#if !defined(BSD) && !defined(__GLIBC__)
static char *__progname;
#endif
@ -327,6 +329,12 @@ tunnel_dns(int tun_fd, int dns_fd)
if ((read = read_dns(dns_fd, &q)) <= 0)
return 0;
if (debug >= 1) {
struct sockaddr_in *tempin;
tempin = (struct sockaddr_in *) &(q.from);
printf("RX: client %s, type %d, name %s\n", inet_ntoa(tempin->sin_addr), q.type, q.name);
}
switch (q.type) {
case T_NULL:
@ -427,6 +435,13 @@ write_dns(int fd, struct query *q, char *data, int datalen)
len = dns_encode(buf, sizeof(buf), q, QR_ANSWER, data, datalen);
if (debug >= 1) {
struct sockaddr_in *tempin;
tempin = (struct sockaddr_in *) &(q->from);
printf("TX: client %s, type %d, name %s, %d bytes data\n",
inet_ntoa(tempin->sin_addr), q->type, q->name, datalen);
}
sendto(fd, buf, len, 0, (struct sockaddr*)&q->from, q->fromlen);
}
@ -499,6 +514,7 @@ main(int argc, char **argv)
port = 53;
check_ip = 1;
skipipconfig = 0;
debug = 0;
b32 = get_base32_encoder();
@ -513,7 +529,7 @@ main(int argc, char **argv)
memset(password, 0, sizeof(password));
srand(time(NULL));
while ((choice = getopt(argc, argv, "vcsfhu:t:d:m:l:p:P:")) != -1) {
while ((choice = getopt(argc, argv, "vcsfhDu:t:d:m:l:p:P:")) != -1) {
switch(choice) {
case 'v':
version();
@ -530,6 +546,9 @@ main(int argc, char **argv)
case 'h':
help();
break;
case 'D':
debug++;
break;
case 'u':
username = optarg;
break;
@ -605,6 +624,12 @@ main(int argc, char **argv)
printf("You must manually forward port 53 to port %d for things to work.\n", port);
}
if (debug) {
printf("Debug level %d enabled, will stay in foreground.\n", debug);
printf("Add more -D switches to set higher debug level.\n");
foreground = 1;
}
if (listen_ip == INADDR_NONE) {
warnx("Bad IP address to listen on.\n");
usage();