Add a -sctp option to s_server

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

1 files changed, 26 insertions, 5 deletions

diff --git a/apps/s_socket.c b/apps/s_socket.c
index d16f5ad817..97dc9afffb 100644
--- a/apps/s_socket.c
+++ b/apps/s_socket.c
@@ -128,7 +128,7 @@ int init_client(int *sock, const char *host, const char *port,
  * 0 on failure, something other on success.
  */
 int do_server(int *accept_sock, const char *host, const char *port,
-              int family, int type, do_server_cb cb,
+              int family, int type, int protocol, do_server_cb cb,
               unsigned char *context, int naccept)
 {
     int asock = 0;
@@ -140,7 +140,8 @@ int do_server(int *accept_sock, const char *host, const char *port,
     if (!BIO_sock_init())
         return 0;
 
-    if (!BIO_lookup(host, port, BIO_LOOKUP_SERVER, family, type, &res)) {
+    if (!BIO_lookup_ex(host, port, BIO_LOOKUP_SERVER, family, type, protocol,
+                       &res)) {
         ERR_print_errors(bio_err);
         return 0;
     }
@@ -148,7 +149,8 @@ int do_server(int *accept_sock, const char *host, const char *port,
     /* Admittedly, these checks are quite paranoid, we should not get
      * 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)));
 
     asock = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
                        BIO_ADDRINFO_protocol(res), 0);
@@ -161,6 +163,25 @@ int do_server(int *accept_sock, const char *host, const char *port,
         goto end;
     }
 
+#ifndef OPENSSL_NO_SCTP
+    if (protocol == IPPROTO_SCTP) {
+        /*
+         * For SCTP we have to set various options on the socket prior to
+         * accepting. 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(asock, BIO_NOCLOSE);
+
+        if (tmpbio == NULL) {
+            BIO_closesocket(asock);
+            ERR_print_errors(bio_err);
+            goto end;
+        }
+        BIO_free(tmpbio);
+    }
+#endif
+
     BIO_ADDRINFO_free(res);
     res = NULL;
 
@@ -176,10 +197,10 @@ int do_server(int *accept_sock, const char *host, const char *port,
                 BIO_closesocket(asock);
                 break;
             }
-            i = (*cb)(sock, type, context);
+            i = (*cb)(sock, type, protocol, context);
             BIO_closesocket(sock);
         } else {
-            i = (*cb)(asock, type, context);
+            i = (*cb)(asock, type, protocol, context);
         }
 
         if (naccept != -1)