1 files changed, 106 insertions, 0 deletions

diff --git a/openbsd-compat/rresvport.c b/openbsd-compat/rresvport.c
new file mode 100644
index 000000000..44eac2036
--- /dev/null
+++ b/openbsd-compat/rresvport.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1995, 1996, 1998 Theo de Raadt.  All rights reserved.
+ * Copyright (c) 1983, 1993, 1994
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ *      This product includes software developed by Theo de Raadt.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#ifndef HAVE_RRESVPORT_AF
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$OpenBSD: rresvport.c,v 1.5 2000/01/26 03:43:20 deraadt Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include "includes.h"
+
+#if 0
+int
+rresvport(alport)
+        int *alport;
+{
+        return rresvport_af(alport, AF_INET);
+}
+#endif
+
+int 
+rresvport_af(int *alport, sa_family_t af)
+{
+        struct sockaddr_storage ss;
+        struct sockaddr *sa;
+        u_int16_t *portp;
+        int s;
+        socklen_t salen;
+
+        memset(&ss, '\0', sizeof ss);
+        sa = (struct sockaddr *)&ss;
+
+        switch (af) {
+        case AF_INET:
+                salen = sizeof(struct sockaddr_in);
+                portp = &((struct sockaddr_in *)sa)->sin_port;
+                break;
+        case AF_INET6:
+                salen = sizeof(struct sockaddr_in6);
+                portp = &((struct sockaddr_in6 *)sa)->sin6_port;
+                break;
+        default:
+                errno = EPFNOSUPPORT;
+                return (-1);
+        }
+        sa->sa_family = af;
+        
+        s = socket(af, SOCK_STREAM, 0);
+        if (s < 0)
+                return (-1);
+
+        *portp = htons(*alport);
+        if (*alport < IPPORT_RESERVED - 1) {
+                if (bind(s, sa, salen) >= 0)
+                        return (s);
+                if (errno != EADDRINUSE) {
+                        (void)close(s);
+                        return (-1);
+                }
+        }
+
+        *portp = 0;
+        sa->sa_family = af;
+        if (bindresvport_sa(s, sa) == -1) {
+                (void)close(s);
+                return (-1);
+        }
+        *alport = ntohs(*portp);
+        return (s);
+}
+
+#endif /* HAVE_RRESVPORT_AF */