logging_gsmtap: Temporarily disable logging when sending the logs
This avoids an infinite recursion when sending a gsmtap log message
causes a log message.
Temporarily set target->loglevel higher than LOGL_FATAL, which
effectively disables logging for that target. Other targets like stderr
will still log this message so there is still an indication that
something went wrong.
Change-Id: I19203cadbad6019a3834793b8ac816d903fe088e
Related: OS#6213
(cherry picked from commit f2629675aac5f95ae3c01f86f5bb3f342a1c1f9b)
diff --git a/src/core/logging_gsmtap.c b/src/core/logging_gsmtap.c
index dfd059b..7775c27 100644
--- a/src/core/logging_gsmtap.c
+++ b/src/core/logging_gsmtap.c
@@ -65,6 +65,7 @@
struct timeval tv;
int rc;
const char *file_basename;
+ unsigned int _level;
/* get timestamp ASAP */
osmo_gettimeofday(&tv, NULL);
@@ -114,7 +115,11 @@
}
msgb_put(msg, rc);
+ /* Ensure that any error occurring when sending the log message doesn't cause infinite recursion */
+ _level = target->loglevel;
+ target->loglevel = UINT8_MAX;
rc = gsmtap_sendmsg(target->tgt_gsmtap.gsmtap_inst, msg);
+ target->loglevel = _level;
if (rc)
msgb_free(msg);
}