| Type | Bug | Status | tested | Date | 16-Jan-2011 19:34 |
|---|---|---|---|---|---|
| Version | alpha 110 | Category | Ports | Submitted by | abolka |
| Platform | All | Severity | minor | Priority | normal |
| Summary | Forward and reverse lookups using the DNS scheme don't work |
|---|---|
| Description |
Previously, we could use dns:// to make forward and reverse lookups. The DNS scheme implementation currently available in R3 (A110) doesn't seem to provide any useful functionality at all. QUERY doesn't work on DNS ports (see #1826), READ just returns a port! object, and the scheme's AWAKE handler is never called. As the hostkit side seems mostly implemented, it probably is a matter of the (native) actor implementation. If this is only a matter of me using dns:// incorrectly, please change this bug to a documentation issue. One workaround for forward lookups is to use a tcp:// port and QUERY the port's remote-ip. |
| Example code |
>> type? read dns://rebol.com == port! >> type? read dns://205.134.252.23 == port! |
| Assigned to | n/a | Fixed in | alpha 111 | Last Update | 13-Dec-2012 02:15 |
|---|
| Comments | |
|---|---|
|
(0003061)
Carl 30-Jan-2011 23:20 |
By default on Win, the port was both low-level and async. So, READ was starting the DNS lookup, but returned immediately. If followed by a WAIT and a FIRST, the correct value was returned.
However, it is reasonable to assume that READ of an unopened DNS scheme should imply a WAIT and return the result, so that's now being done in A111. However, I think there are a few problems lurking: 1. A time out period needs to be provided. Right now it is hardcoded to 20 sec. 2. A DNS signal event may be getting queued, but may not be processed properly for this case. |
|
(0003092)
DideC 11-Feb-2011 10:54 |
Timeout period was globally defined in R2 (system/schemes/default/timeout) and could be set in the port! object.
So for direct (sync) read, we could continue to use a global settings (everybody was fine with this I guess). If we want to use a specific timeout value for each read, then : 1) we have to go the longest way : set the port! object values then make the read on it. 2) we need a refinment to specify the timeout value (ie: read/timeout or read/wait). Making 2) is a bit "specific" for network, or we use a kind of "read/options" with a block of options values that will be set in the port object like [timeout: 10]. It could be usefull for other options that could be protocol specific. |
|
(0003130)
abolka 26-Feb-2011 20:39 |
Contrary to Carl's comment above, this behaviour did not generally change in A111. It was changed on Windows. But at least on Linux (and possibly OSX) we still get:
>> type? read dns://rebol.com == port! #1860 tracks this new cross-platform inconsistency. |
|
(0003258)
abolka 13-Dec-2012 02:15 |
Fixed in the 101.0 (08eb7e84cd) open source release. |
| Date | User | Field | Action | Change |
|---|---|---|---|---|
| 13-Dec-2012 02:15 | abolka | Status | Modified | built => tested |
| 13-Dec-2012 02:15 | abolka | Comment : 0003258 | Added | - |
| 26-Feb-2011 20:50 | abolka | Comment : 0003130 | Modified | - |
| 26-Feb-2011 20:50 | abolka | Comment : 0003130 | Modified | - |
| 26-Feb-2011 20:43 | abolka | Comment : 0003130 | Modified | - |
| 26-Feb-2011 20:43 | abolka | Status | Modified | submitted => built |
| 26-Feb-2011 20:43 | abolka | Fixedin | Modified | => alpha 111 |
| 26-Feb-2011 20:42 | abolka | Comment : 0003130 | Modified | - |
| 26-Feb-2011 20:39 | abolka | Fixedin | Modified | alpha 111 => none |
| 26-Feb-2011 20:39 | abolka | Status | Modified | built => submitted |
| 26-Feb-2011 20:39 | abolka | Comment : 0003130 | Added | - |
| 11-Feb-2011 10:54 | DideC | Comment : 0003092 | Added | - |
| 30-Jan-2011 23:20 | carl | Comment : 0003061 | Added | - |
| 30-Jan-2011 23:15 | carl | Status | Modified | reviewed => built |
| 30-Jan-2011 23:15 | carl | Fixedin | Modified | => alpha 111 |
| 17-Jan-2011 23:28 | BrianH | Category | Modified | Unspecified => Ports |
| 17-Jan-2011 04:15 | carl | Status | Modified | submitted => reviewed |
| 16-Jan-2011 19:38 | abolka | Code | Modified | - |
| 16-Jan-2011 19:38 | abolka | Description | Modified | - |
| 16-Jan-2011 19:34 | abolka | Ticket | Added | - |