new file

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7471 ec53bebd-3082-4978-b11e-865c3cabbd6b
1999-12-03 03:58:05 +00:00
parent cdda6a73cb
commit 3e762af426
1 changed files with 132 additions and 0 deletions
--- a/lib/roken/getnameinfo.c
+++ b/lib/roken/getnameinfo.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 1999 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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 Kungliga Tekniska
+ *      H<>gskolan and its contributors.
+ * 
+ * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id$");
+#endif
+
+#include "roken.h"
+
+static int
+doit (int af,
+      const void *addr,
+      size_t addrlen,
+      int port,
+      char *host, size_t hostlen,
+      char *serv, size_t servlen,
+      int flags)
+{
+    if (host != NULL) {
+	if (flags & NI_NUMERICHOST) {
+	    if (inet_ntop (af, addr, host, hostlen) == NULL)
+		return EAI_SYSTEM;
+	} else {
+	    struct hostent *he = gethostbyaddr (addr,
+						addrlen,
+						af);
+	    if (he != NULL) {
+		strlcpy (host, he->h_name, hostlen);
+		if (flags & NI_NOFQDN) {
+		    char *dot = strchr (host, '.');
+		    if (dot != NULL)
+			*dot = '\0';
+		}
+	    } else if (flags & NI_NAMEREQD) {
+		return EAI_NONAME;
+	    } else if (inet_ntop (AF_INET, addr, host, hostlen) == NULL)
+		return EAI_SYSTEM;
+	}
+    }
+
+    if (serv != NULL) {
+	if (flags & NI_NUMERICSERV) {
+	    snprintf (serv, servlen, "%u", ntohs(port));
+	} else {
+	    const char *proto = "tcp";
+	    struct servent *se;
+
+	    if (flags & NI_DGRAM)
+		proto = "udp";
+
+	    se = getservbyport (port, proto);
+	    if (se == NULL) {
+		snprintf (serv, servlen, "%u", ntohs(port));
+	    } else {
+		strlcpy (serv, se->s_name, servlen);
+	    }
+	}
+    }
+    return 0;
+}
+
+/*
+ *
+ */
+
+int
+getnameinfo(const struct sockaddr *sa, socklen_t salen,
+	    char *host, size_t hostlen,
+	    char *serv, size_t servlen,
+	    int flags)
+{
+    switch (sa->sa_family) {
+#ifdef HAVE_IPV6
+    case AF_INET6 : {
+	const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
+
+	return doit (AF_INET6, &sin6->sin6_addr, sizeof(sin6->sin6_addr),
+		     sin6->sin6_port,
+		     host, hostlen,
+		     serv, servlen,
+		     flags);
+    }
+#endif
+    case AF_INET : {
+	const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
+
+	return doit (AF_INET, &sin->sin_addr, sizeof(sin->sin_addr),
+		     sin->sin_port,
+		     host, hostlen,
+		     serv, servlen,
+		     flags);
+    }
+    default :
+	return EAI_FAMILY;
+    }
+}