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https://github.com/yarrick/iodine.git
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#11 Fix delayed ack timer
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8d766e2857
commit
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@ -79,13 +79,30 @@ init_users()
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}
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static int
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find_user_by_ip(uint32_t ip)
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users_waiting_on_reply()
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{
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int ret = -1;
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int ret;
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int i;
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ret = 0;
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for (i = 0; i < USERS; i++) {
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if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
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users[i].q.id != 0) {
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ret++;
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}
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}
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return ret;
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}
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static int
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find_user_by_ip(uint32_t ip)
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{
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int ret;
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int i;
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ret = -1;
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for (i = 0; i < USERS; i++) {
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/* Not used at all or not used in one minute */
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if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
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ip == users[i].tun_ip) {
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ret = i;
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@ -177,7 +194,7 @@ static int
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tunnel_dns(int tun_fd, int dns_fd)
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{
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struct in_addr tempip;
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struct query q;
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struct user dummy;
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unsigned long outlen;
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char logindata[16];
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char out[64*1024];
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@ -189,7 +206,7 @@ tunnel_dns(int tun_fd, int dns_fd)
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int code;
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userid = -1;
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if ((read = read_dns(dns_fd, &q, in, sizeof(in))) <= 0)
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if ((read = read_dns(dns_fd, &(dummy.q), in, sizeof(in))) <= 0)
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return 0;
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if(in[0] == 'V' || in[0] == 'v') {
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@ -206,33 +223,36 @@ tunnel_dns(int tun_fd, int dns_fd)
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userid = find_available_user();
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if (userid >= 0) {
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users[userid].seed = rand();
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memcpy(&(users[userid].host), &(q.from), q.fromlen);
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memcpy(&(users[userid].q), &q, sizeof(struct query));
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users[userid].addrlen = q.fromlen;
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memcpy(&(users[userid].host), &(dummy.q.from), dummy.q.fromlen);
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users[userid].addrlen = dummy.q.fromlen;
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memcpy(&(users[userid].q), &(dummy.q), sizeof(struct query));
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users[userid].q.id = 0;
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send_version_response(dns_fd, VERSION_ACK, users[userid].seed, &users[userid]);
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} else {
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/* No space for another user */
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send_version_response(dns_fd, VERSION_FULL, USERS, NULL);
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send_version_response(dns_fd, VERSION_FULL, USERS, &dummy);
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}
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} else {
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send_version_response(dns_fd, VERSION_NACK, VERSION, NULL);
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send_version_response(dns_fd, VERSION_NACK, VERSION, &dummy);
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}
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} else {
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send_version_response(dns_fd, VERSION_NACK, VERSION, NULL);
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send_version_response(dns_fd, VERSION_NACK, VERSION, &dummy);
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}
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} else if(in[0] == 'L' || in[0] == 'l') {
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/* Login phase, handle auth */
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userid = in[1];
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if (userid < 0 || userid >= USERS) {
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write_dns(dns_fd, &q, "BADIP", 5);
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write_dns(dns_fd, &(dummy.q), "BADIP", 5);
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return 0; /* illegal id */
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}
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users[userid].last_pkt = time(NULL);
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memcpy(&(users[userid].q), &(dummy.q), sizeof(struct query));
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users[userid].q.id = 0;
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login_calculate(logindata, 16, password, users[userid].seed);
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if (q.fromlen != users[userid].addrlen ||
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memcmp(&(users[userid].host), &(q.from), q.fromlen) != 0) {
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write_dns(dns_fd, &q, "BADIP", 5);
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if (dummy.q.fromlen != users[userid].addrlen ||
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memcmp(&(users[userid].host), &(dummy.q.from), dummy.q.fromlen) != 0) {
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write_dns(dns_fd, &(dummy.q), "BADIP", 5);
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} else {
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if (read >= 18 && (memcmp(logindata, in+2, 16) == 0)) {
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/* Login ok, send ip/mtu info */
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@ -245,20 +265,20 @@ tunnel_dns(int tun_fd, int dns_fd)
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read = snprintf(out, sizeof(out), "%s-%s-%d",
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tmp[0], tmp[1], my_mtu);
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write_dns(dns_fd, &q, out, read);
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q.id = 0;
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write_dns(dns_fd, &(dummy.q), out, read);
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dummy.q.id = 0;
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free(tmp[1]);
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free(tmp[0]);
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} else {
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write_dns(dns_fd, &q, "LNAK", 4);
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write_dns(dns_fd, &(dummy.q), "LNAK", 4);
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}
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}
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} else if(in[0] == 'P' || in[0] == 'p') {
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/* Ping packet, store userid */
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userid = in[1];
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if (userid < 0 || userid >= USERS) {
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write_dns(dns_fd, &q, "BADIP", 5);
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write_dns(dns_fd, &(dummy.q), "BADIP", 5);
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return 0; /* illegal id */
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}
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} else if((in[0] >= '0' && in[0] <= '9')
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@ -273,16 +293,18 @@ tunnel_dns(int tun_fd, int dns_fd)
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userid = code >> 1;
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if (userid < 0 || userid >= USERS) {
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write_dns(dns_fd, &q, "BADIP", 5);
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write_dns(dns_fd, &(dummy.q), "BADIP", 5);
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return 0; /* illegal id */
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}
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users[userid].last_pkt = time(NULL);
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/* Check sending ip number */
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if (q.fromlen != users[userid].addrlen ||
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memcmp(&(users[userid].host), &(q.from), q.fromlen) != 0) {
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write_dns(dns_fd, &q, "BADIP", 5);
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if (dummy.q.fromlen != users[userid].addrlen ||
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memcmp(&(users[userid].host), &(dummy.q.from), dummy.q.fromlen) != 0) {
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write_dns(dns_fd, &(dummy.q), "BADIP", 5);
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} else {
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users[userid].last_pkt = time(NULL);
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memcpy(&(users[userid].q), &(dummy.q), sizeof(struct query));
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users[userid].addrlen = dummy.q.fromlen;
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memcpy(users[userid].inpacket.data + users[userid].inpacket.offset, in + 1, read - 1);
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users[userid].inpacket.len += read - 1;
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users[userid].inpacket.offset += read - 1;
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@ -299,13 +321,13 @@ tunnel_dns(int tun_fd, int dns_fd)
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}
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}
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/* userid must be set for a reply to be sent */
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if (userid >= 0 && userid < USERS && q.fromlen == users[userid].addrlen &&
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memcmp(&(users[userid].host), &(q.from), q.fromlen) == 0 &&
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if (userid >= 0 && userid < USERS && dummy.q.fromlen == users[userid].addrlen &&
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memcmp(&(users[userid].host), &(dummy.q.from), dummy.q.fromlen) == 0 &&
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users[userid].outpacket.len > 0) {
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write_dns(dns_fd, &q, users[userid].outpacket.data, users[userid].outpacket.len);
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write_dns(dns_fd, &(dummy.q), users[userid].outpacket.data, users[userid].outpacket.len);
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users[userid].outpacket.len = 0;
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q.id = 0;
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dummy.q.id = 0;
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}
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return 0;
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@ -320,13 +342,13 @@ tunnel(int tun_fd, int dns_fd)
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int j;
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while (running) {
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//if (q.id != 0) {
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if (users_waiting_on_reply()) {
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tv.tv_sec = 0;
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tv.tv_usec = 5000;
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/*} else {
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} else {
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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}*/
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}
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FD_ZERO(&fds);
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//if(outpacket.len == 0) TODO fix this
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