openssl: remove obsolete function tls_set_hostname()

- Wrong pointer notation in first parameter (char * instead of char **). But
  the function can be removed for simplicity.
- Renames also http_cli.tls_hostname to http_cli.tlshn which might be more
  libre conform naming style.

include/re_tls.h

@@ -52,7 +52,6 @@ int tls_peer_fingerprint(const struct tls_conn *tc, enum tls_fingerprint type,
 int tls_peer_common_name(const struct tls_conn *tc, char *cn, size_t size);
 int tls_peer_set_verify_host(struct tls_conn *tc, const char *hostname);
 int tls_set_verify_purpose(struct tls *tls, const char *purpose);
-int tls_set_hostname(char *tls_hostname, const struct pl *hostname);
 int tls_peer_verify(const struct tls_conn *tc);
 int tls_srtp_keyinfo(const struct tls_conn *tc, enum srtp_suite *suite,
 		     uint8_t *cli_key, size_t cli_key_size,

src/http/client.c

@@ -42,7 +42,7 @@ struct http_cli {
 	struct hash *ht_conn;
 	struct dnsc *dnsc;
 	struct tls *tls;
-	char *tls_hostname;
+	char *tlshn;
 	char *cert;
 	char *key;
 	struct sa laddr;
@@ -113,7 +113,7 @@ static void cli_destructor(void *arg)
 	mem_deref(cli->key);
 	mem_deref(cli->dnsc);
 	mem_deref(cli->tls);
-	mem_deref(cli->tls_hostname);
+	mem_deref(cli->tlshn);
 }
 
 
@@ -472,9 +472,9 @@ static int conn_connect(struct http_req *req)
 		if (err)
 			goto out;
 
-		if (req->cli->tls_hostname)
+		if (req->cli->tlshn)
 			err = tls_peer_set_verify_host(conn->sc,
-				req->cli->tls_hostname);
+				req->cli->tlshn);
 
 		if (err)
 			goto out;
@@ -945,10 +945,14 @@ int http_client_set_keypem(struct http_cli *cli, const char *pem)
 int http_client_set_tls_hostname(struct http_cli *cli,
 				 const struct pl *hostname)
 {
-	if (!cli || !hostname)
+	if (!cli)
 		return EINVAL;
 
-	return tls_set_hostname(cli->tls_hostname, hostname);
+	cli->tlshn = mem_deref(cli->tlshn);
+	if (!hostname)
+		return 0;
+
+	return pl_strdup(&cli->tlshn, hostname);
 }
 #endif
 

src/tls/openssl/tls.c

@@ -333,28 +333,6 @@ int tls_peer_set_verify_host(struct tls_conn *tc, const char *hostname)
 }
 
 
-/**
- * Convert string hostname to pl hostname
- *
- * @param tls_hostname Certificate hostname as string
- * @param hostname     Certificate hostname as pl
- *
- * @return int         0 if success, errorcode otherwise
- */
-int tls_set_hostname(char *tls_hostname, const struct pl *hostname)
-{
-	if (!tls_hostname || !hostname)
-		return EINVAL;
-
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-	DEBUG_WARNING("verify hostname needs openssl version 1.1.0\n");
-	return ENOSYS;
-#endif
-
-	return pl_strdup(&tls_hostname, hostname);
-}
-
-
 /**
  * Generate and set selfsigned certificate on TLS context
  *