1 files changed, 122 insertions, 0 deletions
diff --git a/src/rgw/rgw_http_client_curl.cc b/src/rgw/rgw_http_client_curl.cc
new file mode 100644
index 000000000..d243251a8
--- /dev/null
+++ b/src/rgw/rgw_http_client_curl.cc
@@ -0,0 +1,122 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+#include "rgw_http_client_curl.h"
+#include <mutex>
+#include <vector>
+#include <curl/curl.h>
+
+#include "rgw_common.h"
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rgw
+
+#ifdef WITH_CURL_OPENSSL
+#include <openssl/crypto.h>
+#endif
+
+#if defined(WITH_CURL_OPENSSL) && OPENSSL_API_COMPAT < 0x10100000L
+namespace openssl {
+
+class RGWSSLSetup
+{
+  std::vector <std::mutex> locks;
+public:
+  explicit RGWSSLSetup(int n) : locks (n){}
+
+  void set_lock(int id){
+    try {
+      locks.at(id).lock();
+    } catch (std::out_of_range& e) {
+      dout(0) << __func__ << " failed to set locks" << dendl;
+    }
+  }
+
+  void clear_lock(int id){
+    try {
+      locks.at(id).unlock();
+    } catch (std::out_of_range& e) {
+      dout(0) << __func__ << " failed to unlock" << dendl;
+    }
+  }
+};
+
+
+void rgw_ssl_locking_callback(int mode, int id, const char *file, int line)
+{
+  static RGWSSLSetup locks(CRYPTO_num_locks());
+  if (mode & CRYPTO_LOCK)
+    locks.set_lock(id);
+  else
+    locks.clear_lock(id);
+}
+
+unsigned long rgw_ssl_thread_id_callback(){
+  return (unsigned long)pthread_self();
+}
+
+void init_ssl(){
+  CRYPTO_set_id_callback((unsigned long (*) ()) rgw_ssl_thread_id_callback);
+  CRYPTO_set_locking_callback(rgw_ssl_locking_callback);
+}
+
+} /* namespace openssl */
+#endif // WITH_CURL_OPENSSL
+
+
+namespace rgw {
+namespace curl {
+
+static void check_curl()
+{
+#ifndef HAVE_CURL_MULTI_WAIT
+  derr << "WARNING: libcurl doesn't support curl_multi_wait()" << dendl;
+  derr << "WARNING: cross zone / region transfer performance may be affected" << dendl;
+#endif
+}
+
+#if defined(WITH_CURL_OPENSSL) && OPENSSL_API_COMPAT < 0x10100000L
+void init_ssl() {
+  ::openssl::init_ssl();
+}
+
+bool fe_inits_ssl(boost::optional <const fe_map_t&> m, long& curl_global_flags){
+  if (m) {
+    for (const auto& kv: *m){
+      if (kv.first == "civetweb" || kv.first == "beast"){
+        std::string cert;
+        kv.second->get_val("ssl_certificate","", &cert);
+        if (!cert.empty()){
+         /* TODO this flag is no op for curl > 7.57 */
+          curl_global_flags &= ~CURL_GLOBAL_SSL;
+          return true;
+        }
+      }
+    }
+  }
+  return false;
+}
+#endif // WITH_CURL_OPENSSL
+
+std::once_flag curl_init_flag;
+
+void setup_curl(boost::optional<const fe_map_t&> m) {
+  check_curl();
+
+  long curl_global_flags = CURL_GLOBAL_ALL;
+
+  #if defined(WITH_CURL_OPENSSL) && OPENSSL_API_COMPAT < 0x10100000L
+  if (!fe_inits_ssl(m, curl_global_flags))
+    init_ssl();
+  #endif
+
+  std::call_once(curl_init_flag, curl_global_init, curl_global_flags);
+  rgw_setup_saved_curl_handles();
+}
+
+void cleanup_curl() {
+  rgw_release_all_curl_handles();
+  curl_global_cleanup();
+}
+
+} /* namespace curl */
+} /* namespace rgw */