Add a -sctp option to s_client

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3286)

1 files changed, 26 insertions, 3 deletions

diff --git a/apps/s_socket.c b/apps/s_socket.c
index 97dc9afffb..04f3e6741c 100644
--- a/apps/s_socket.c
+++ b/apps/s_socket.c
@@ -44,6 +44,7 @@ typedef unsigned int u_int;
  * @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
  *  AF_UNSPEC
  * @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
+ * @protocol: socket protocol, e.g. IPPROTO_TCP or IPPROTO_UDP (or 0 for any)
  *
  * This will create a socket and use it to connect to a host:port, or if
  * family == AF_UNIX, to the path found in host.
@@ -55,7 +56,7 @@ typedef unsigned int u_int;
  * Returns 1 on success, 0 on failure.
  */
 int init_client(int *sock, const char *host, const char *port,
-                int family, int type)
+                int family, int type, int protocol)
 {
     BIO_ADDRINFO *res = NULL;
     const BIO_ADDRINFO *ai = NULL;
@@ -64,7 +65,8 @@ int init_client(int *sock, const char *host, const char *port,
     if (!BIO_sock_init())
         return 0;
 
-    ret = BIO_lookup(host, port, BIO_LOOKUP_CLIENT, family, type, &res);
+    ret = BIO_lookup_ex(host, port, BIO_LOOKUP_CLIENT, family, type, protocol,
+                        &res);
     if (ret == 0) {
         ERR_print_errors(bio_err);
         return 0;
@@ -76,7 +78,9 @@ int init_client(int *sock, const char *host, const char *port,
          * anything in the BIO_ADDRINFO chain that we haven't
          * asked for. */
         OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
-                       && (type == 0 || type == BIO_ADDRINFO_socktype(res)));
+                       && (type == 0 || type == BIO_ADDRINFO_socktype(res))
+                       && (protocol == 0
+                           || protocol == BIO_ADDRINFO_protocol(res)));
 
         *sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai),
                            BIO_ADDRINFO_protocol(res), 0);
@@ -86,6 +90,25 @@ int init_client(int *sock, const char *host, const char *port,
              */
             continue;
         }
+
+#ifndef OPENSSL_NO_SCTP
+        if (protocol == IPPROTO_SCTP) {
+            /*
+             * For SCTP we have to set various options on the socket prior to
+             * connecting. This is done automatically by BIO_new_dgram_sctp().
+             * We don't actually need the created BIO though so we free it again
+             * immediately.
+             */
+            BIO *tmpbio = BIO_new_dgram_sctp(*sock, BIO_NOCLOSE);
+
+            if (tmpbio == NULL) {
+                ERR_print_errors(bio_err);
+                return 0;
+            }
+            BIO_free(tmpbio);
+        }
+#endif
+
         if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai), 0)) {
             BIO_closesocket(*sock);
             *sock = INVALID_SOCKET;