[GNUnet-SVN] [gnurl] 35/125: openldap: add commented out debug possibilities

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ng0 pushed a commit to branch master
in repository gnurl.

commit ff07f07cc8668b6922e0e90606cc63fbd1abb684
Author: Stepan Broz <address@hidden>
AuthorDate: Wed Dec 6 08:54:35 2017 +0100

    openldap: add commented out debug possibilities
    
    ... to aid debugging openldap library using its built-in debug messages.
    
    Closes #2159
---
 lib/openldap.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/openldap.c b/lib/openldap.c
index ac356d098..5e9cdb3ea 100644
--- a/lib/openldap.c
+++ b/lib/openldap.c
@@ -51,6 +51,25 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+/*
+ * Uncommenting this will enable the built-in debug logging of the openldap
+ * library. The debug log level can be set using the CURL_OPENLDAP_TRACE
+ * environment variable. The debug output is written to stderr.
+ * 
+ * The library supports the following debug flags: 
+ * LDAP_DEBUG_NONE         0x0000
+ * LDAP_DEBUG_TRACE        0x0001
+ * LDAP_DEBUG_CONSTRUCT    0x0002
+ * LDAP_DEBUG_DESTROY      0x0004
+ * LDAP_DEBUG_PARAMETER    0x0008
+ * LDAP_DEBUG_ANY          0xffff 
+ * 
+ * For example, use CURL_OPENLDAP_TRACE=0 for no debug,
+ * CURL_OPENLDAP_TRACE=2 for LDAP_DEBUG_CONSTRUCT messages only,
+ * CURL_OPENLDAP_TRACE=65535 for all debug message levels.
+ */
+/* #define CURL_OPENLDAP_DEBUG */
+
 #ifndef _LDAP_PVT_H
 extern int ldap_pvt_url_scheme2proto(const char *);
 extern int ldap_init_fd(ber_socket_t fd, int proto, const char *url,
@@ -204,6 +223,15 @@ static CURLcode ldap_connect(struct connectdata *conn, 
bool *done)
   snprintf(ptr, sizeof(hosturl)-(ptr-hosturl), "://%s:%d",
     conn->host.name, conn->remote_port);
 
+#ifdef CURL_OPENLDAP_DEBUG
+  static int do_trace = 0;
+  const char *env = getenv("CURL_OPENLDAP_TRACE");
+  do_trace = (env && strtol(env, NULL, 10) > 0);
+  if (do_trace) {
+    ldap_set_option(li->ld, LDAP_OPT_DEBUG_LEVEL, &do_trace);
+  }
+#endif
+
   rc = ldap_init_fd(conn->sock[FIRSTSOCKET], li->proto, hosturl, &li->ld);
   if(rc) {
     failf(data, "LDAP local: Cannot connect to %s, %s",

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