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| author | Nick Mathewson <nickm@torproject.org> | 2006-10-25 21:46:21 +0000 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2006-10-25 21:46:21 +0000 |
| commit | 3fbb292bfff2765c4e541763e4e40e068e55e4ab (patch) | |
| tree | d08410be5b47a1a5558a053458ee54b846e6ad67 | |
| parent | 5c670a186c1f45a2ddfcab00c065f994d8a888f7 (diff) | |
| download | tor-3fbb292bfff2765c4e541763e4e40e068e55e4ab.tar.gz tor-3fbb292bfff2765c4e541763e4e40e068e55e4ab.zip | |
r9389@Kushana: nickm | 2006-10-25 17:46:16 -0400
Add a CLEARDNSCACHE signal to clear the client-side DNS cache.
svn:r8829
| -rw-r--r-- | ChangeLog | 2 | ||||
| -rw-r--r-- | doc/control-spec.txt | 7 | ||||
| -rw-r--r-- | src/or/control.c | 2 | ||||
| -rw-r--r-- | src/or/main.c | 6 | ||||
| -rw-r--r-- | src/or/or.h | 1 |
5 files changed, 16 insertions, 2 deletions
@@ -30,6 +30,8 @@ Changes in version 0.1.2.3-alpha - 2006-10-?? has changed. - Add a GETINFO events/names and GETINFO features/names so controllers can tell which events and features are supported. + - A new CLEARDNSCACHE signal to allow controllers to clear the + client-side DNS cache without expiring circuits. o Security bugfixes: - When the user sends a NEWNYM signal, clear the client-side DNS diff --git a/doc/control-spec.txt b/doc/control-spec.txt index 2231027699..798d10ef3e 100644 --- a/doc/control-spec.txt +++ b/doc/control-spec.txt @@ -242,7 +242,8 @@ $Id$ "SIGNAL" SP Signal CRLF Signal = "RELOAD" / "SHUTDOWN" / "DUMP" / "DEBUG" / "HALT" / - "HUP" / "INT" / "USR1" / "USR2" / "TERM" / "NEWNYM" + "HUP" / "INT" / "USR1" / "USR2" / "TERM" / "NEWNYM" / + "CLEARDNSCACHE" The meaning of the signals are: @@ -254,8 +255,10 @@ $Id$ circuits. (like USR1) DEBUG -- Debug: switch all open logs to loglevel debug. (like USR2) HALT -- Immediate shutdown: clean up and exit now. (like TERM) + CLEARDNSCACHE -- Forget the client-side cached IPs for all hostnames. NEWNYM -- Switch to clean circuits, so new application requests - don't share any circuits with old ones. + don't share any circuits with old ones. Also clears + the client-side DNS cache. The server responds with "250 OK" if the signal is recognized (or simply closes the socket if it was asked to close immediately), or "552 diff --git a/src/or/control.c b/src/or/control.c index 60a233211d..036323d2b4 100644 --- a/src/or/control.c +++ b/src/or/control.c @@ -1283,6 +1283,8 @@ handle_control_signal(control_connection_t *conn, uint32_t len, sig = SIGTERM; else if (!strcasecmp(s, "NEWNYM")) sig = SIGNEWNYM; + else if (!strcasecmp(s, "CLEARDNSCACHE")) + sig = SIGCLEARDNSCACHE; else { connection_printf_to_buf(conn, "552 Unrecognized signal code \"%s\"\r\n", s); diff --git a/src/or/main.c b/src/or/main.c index 0dafa54050..c580eb243a 100644 --- a/src/or/main.c +++ b/src/or/main.c @@ -1260,6 +1260,9 @@ control_signal_act(int the_signal) case SIGNEWNYM: signal_callback(0,0,(void*)(uintptr_t)SIGNEWNYM); break; + case SIGCLEARDNSCACHE: + signal_callback(0,0,(void*)(uintptr_t)SIGCLEARDNSCACHE); + break; default: log_warn(LD_BUG, "Unrecognized signal number %d.", the_signal); break; @@ -1320,6 +1323,9 @@ signal_callback(int fd, short events, void *arg) circuit_expire_all_dirty_circs(); addressmap_clear_transient(); break; + case SIGCLEARDNSCACHE: + addressmap_clear_transient(); + break; } } diff --git a/src/or/or.h b/src/or/or.h index 9036ef0192..bdae373601 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -147,6 +147,7 @@ /* Controller signals start at a high number so we don't * conflict with system-defined signals. */ #define SIGNEWNYM 129 +#define SIGCLEARDNSCACHE 130 #if (SIZEOF_CELL_T != 0) /* On Irix, stdlib.h defines a cell_t type, so we need to make sure |