constify PACKET

PACKET contents should be read-only. To achieve this, also
- constify two user callbacks
- constify BUF_reverse.

Reviewed-by: Rich Salz <rsalz@openssl.org>

3 files changed, 4 insertions, 4 deletions

diff --git a/apps/s_apps.h b/apps/s_apps.h
index a065da493c..9339b41609 100644
--- a/apps/s_apps.h
+++ b/apps/s_apps.h
@@ -188,7 +188,7 @@ long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 void apps_ssl_info_callback(const SSL *s, int where, int ret);
 void msg_cb(int write_p, int version, int content_type, const void *buf,
             size_t len, SSL *ssl, void *arg);
-void tlsext_cb(SSL *s, int client_server, int type, unsigned char *data,
+void tlsext_cb(SSL *s, int client_server, int type, const unsigned char *data,
                int len, void *arg);
 #endif
 
diff --git a/apps/s_cb.c b/apps/s_cb.c
index 55d2c39e8b..5e36e7e2f8 100644
--- a/apps/s_cb.c
+++ b/apps/s_cb.c
@@ -722,14 +722,14 @@ static STRINT_PAIR tlsext_types[] = {
 };
 
 void tlsext_cb(SSL *s, int client_server, int type,
-               unsigned char *data, int len, void *arg)
+               const unsigned char *data, int len, void *arg)
 {
     BIO *bio = arg;
     const char *extname = lookup(type, tlsext_types, "unknown");
 
     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
                client_server ? "server" : "client", extname, type, len);
-    BIO_dump(bio, (char *)data, len);
+    BIO_dump(bio, (const char *)data, len);
     (void)BIO_flush(bio);
 }
 
diff --git a/apps/s_server.c b/apps/s_server.c
index 9d9cb241be..6467060c0f 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -3216,7 +3216,7 @@ static int add_session(SSL *ssl, SSL_SESSION *session)
     return 0;
 }
 
-static SSL_SESSION *get_session(SSL *ssl, unsigned char *id, int idlen,
+static SSL_SESSION *get_session(SSL *ssl, const unsigned char *id, int idlen,
                                 int *do_copy)
 {
     simple_ssl_session *sess;