Fix ssl_poll_perf perftool in CI

Use SSL_set1_dnsname if available. If not, fallback to SSL_set1_host

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
MergeDate: Fri Feb 27 17:55:27 2026
(Merged from #82)

Author: andrewkdinh

source/CMakeLists.txt

@@ -155,6 +155,7 @@ endif()
 target_include_directories(perf PUBLIC "${PROJECT_SOURCE_DIR}")
 target_link_libraries(perf PUBLIC OpenSSL::SSL OpenSSL::Crypto)
 set(CMAKE_REQUIRED_LIBRARIES OpenSSL::Crypto)
+set(CMAKE_REQUIRED_LIBRARIES OpenSSL::SSL OpenSSL::Crypto)
 set(CMAKE_REQUIRED_INCLUDES "${OPENSSL_INCLUDE_DIR}")
 
 if( OPENSSL_VERSION VERSION_GREATER_EQUAL 3 )
@@ -167,6 +168,7 @@ if( OPENSSL_VERSION VERSION_GREATER_EQUAL 3 )
 endif()
 
 check_symbol_exists(OSSL_LIB_CTX_freeze "openssl/crypto.h" HAVE_OSSL_LIB_CTX_FREEZE)
+check_symbol_exists(SSL_set1_dnsname "openssl/ssl.h" HAVE_SSL_SET1_DNSNAME)
 
 if( OPENSSL_VERSION VERSION_GREATER_EQUAL 3.6 )
     add_executable(ssl_poll_perf ssl_poll_perf.c)

source/config.h.in

@@ -2,3 +2,6 @@
 
 /* Define to 1 if you have the `OSSL_LIB_CTX_freeze' function. */
 #cmakedefine HAVE_OSSL_LIB_CTX_FREEZE
+
+/* Define to 1 if you have the `SSL_set1_dnsname' function. */
+#cmakedefine HAVE_SSL_SET1_DNSNAME

source/ssl_poll_perf.c

@@ -49,6 +49,7 @@
 #include <openssl/quic.h>
 #include "perflib/perflib.h"
 #include "perflib/list.h"
+#include "config.h"
 
 #ifndef _WIN32
 # include <unistd.h>
@@ -2981,10 +2982,17 @@ create_client_pe(SSL_CTX *ctx, struct client_stats *cs)
         goto fail;
     }
 
+#ifdef HAVE_SSL_SET1_DNSNAME
+    if (SSL_set1_dnsname(qconn, hostname) == 0) {
+        DPRINTFC(stderr, "%s SSL_set1_dnsname() failed\n", __func__);
+        goto fail;
+    }
+#else
     if (SSL_set1_host(qconn, hostname) == 0) {
         DPRINTFC(stderr, "%s SSL_set1_host() failed\n", __func__);
         goto fail;
     }
+#endif
 
     /* SSL_set_alpn_protos returns 0 for success! */
     switch (alpn) {