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Added debug capability on server
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2ab94a7991
commit
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@ -17,6 +17,8 @@ CHANGES:
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- Fixed bug #21, now only IP address part of each packet is checked.
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Should remove the need for the -c option and also work with
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bugfixed DNS servers worldwide.
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- Added -D option on server to enable debugging. Debug level 1 now prints
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info about each RX/TX datagram.
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2007-11-30: 0.4.1 "Tea Online"
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- Introduced encoding API
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@ -25,7 +25,7 @@ iodine, iodined \- tunnel IPv4 over DNS
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.B iodined [-h]
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.B iodined [-c] [-s] [-f] [-u
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.B iodined [-c] [-s] [-f] [-D] [-u
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.I user
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.B ] [-P
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.I password
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@ -79,13 +79,15 @@ and otherwise tunX.
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.SS Server Options:
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.TP
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.B -c
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Disable checks on client IP and port on all incoming requests.
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This might help if server is behind a NAT firewall.
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Disable checks on client IP on all incoming requests.
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.TP
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.B -s
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Don't try to configure IP address or MTU. This should only be used if
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you have already configured the device that will be used.
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.TP
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.B -D
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Increase debug level. Level 1 prints info about each RX/TX packet.
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.TP
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.B -m mtu
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Set 'mtu' as mtu size for the tunnel device. This will be sent to the client
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on connect, and the client will use the same mtu.
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@ -57,6 +57,8 @@ static int check_ip;
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static int my_mtu;
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static in_addr_t my_ip;
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static int debug;
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#if !defined(BSD) && !defined(__GLIBC__)
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static char *__progname;
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#endif
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@ -327,6 +329,12 @@ tunnel_dns(int tun_fd, int dns_fd)
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if ((read = read_dns(dns_fd, &q)) <= 0)
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return 0;
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if (debug >= 1) {
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struct sockaddr_in *tempin;
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tempin = (struct sockaddr_in *) &(q.from);
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printf("RX: client %s, type %d, name %s\n", inet_ntoa(tempin->sin_addr), q.type, q.name);
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}
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switch (q.type) {
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case T_NULL:
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@ -427,6 +435,13 @@ write_dns(int fd, struct query *q, char *data, int datalen)
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len = dns_encode(buf, sizeof(buf), q, QR_ANSWER, data, datalen);
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if (debug >= 1) {
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struct sockaddr_in *tempin;
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tempin = (struct sockaddr_in *) &(q->from);
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printf("TX: client %s, type %d, name %s, %d bytes data\n",
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inet_ntoa(tempin->sin_addr), q->type, q->name, datalen);
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}
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sendto(fd, buf, len, 0, (struct sockaddr*)&q->from, q->fromlen);
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}
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@ -499,6 +514,7 @@ main(int argc, char **argv)
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port = 53;
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check_ip = 1;
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skipipconfig = 0;
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debug = 0;
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b32 = get_base32_encoder();
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@ -513,7 +529,7 @@ main(int argc, char **argv)
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memset(password, 0, sizeof(password));
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srand(time(NULL));
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while ((choice = getopt(argc, argv, "vcsfhu:t:d:m:l:p:P:")) != -1) {
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while ((choice = getopt(argc, argv, "vcsfhDu:t:d:m:l:p:P:")) != -1) {
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switch(choice) {
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case 'v':
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version();
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@ -530,6 +546,9 @@ main(int argc, char **argv)
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case 'h':
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help();
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break;
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case 'D':
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debug++;
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break;
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case 'u':
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username = optarg;
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break;
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@ -605,6 +624,12 @@ main(int argc, char **argv)
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printf("You must manually forward port 53 to port %d for things to work.\n", port);
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}
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if (debug) {
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printf("Debug level %d enabled, will stay in foreground.\n", debug);
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printf("Add more -D switches to set higher debug level.\n");
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foreground = 1;
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}
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if (listen_ip == INADDR_NONE) {
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warnx("Bad IP address to listen on.\n");
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usage();
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