Preserve fileprefix accross reuse in http3 demo server

The fileprefix that we serve content from needs to be preserved accross
h3ssl reuse.  Make sure we restore it after zeroing the struct.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26180)

diff --git a/demos/http3/ossl-nghttp3-demo-server.c b/demos/http3/ossl-nghttp3-demo-server.c
index 3ee5fa8e75f722d6ca841bdd1a3edb53da504d66..dcfd652ca2de2d8a4acf35fa5692539b009eec8a 100644 (file)
--- a/demos/http3/ossl-nghttp3-demo-server.c
+++ b/demos/http3/ossl-nghttp3-demo-server.c
@@ -84,6 +84,7 @@ static void init_ids(struct h3ssl *h3ssl)
 {
     struct ssl_id *ssl_ids;
     int i;
+    char *prior_fileprefix = h3ssl->fileprefix;
 
     memset (h3ssl, 0, sizeof (struct h3ssl));
 
@@ -92,6 +93,9 @@ static void init_ids(struct h3ssl *h3ssl)
         ssl_ids[i].id = UINT64_MAX;
     }
     h3ssl->id_bidi = UINT64_MAX;
+
+    /* restore the fileprefix */
+    h3ssl->fileprefix = prior_fileprefix;
 }
 
 static void reuse_h3ssl(struct h3ssl *h3ssl)