1 files changed, 106 insertions, 0 deletions

diff --git a/src/lib/libc/net/ns_ntoa.c b/src/lib/libc/net/ns_ntoa.c
new file mode 100644
index 0000000000..fd67e459da
--- /dev/null
+++ b/src/lib/libc/net/ns_ntoa.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1986, 1993
+ *      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. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char rcsid[] = "$OpenBSD: ns_ntoa.c,v 1.13 2003/09/25 21:14:46 millert Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netns/ns.h>
+#include <stdio.h>
+
+static char *spectHex(char *);
+
+char *
+ns_ntoa(struct ns_addr addr)
+{
+        static char obuf[40];
+        union { union ns_net net_e; u_int32_t long_e; } net;
+        in_port_t port = htons(addr.x_port);
+        char *cp, *cp2;
+        u_char *up = addr.x_host.c_host;
+        u_char *uplim = up + 6;
+        size_t rem;
+
+        net.net_e = addr.x_net;
+        snprintf(obuf, sizeof obuf, "%x", ntohl(net.long_e));
+        cp = spectHex(obuf);
+        rem = sizeof(obuf) - (cp - obuf);
+        cp2 = cp + 1;
+        while (up < uplim && *up==0)
+                up++;
+        if (up == uplim) {
+                if (port) {
+                        snprintf(cp, rem, ".0");
+                        cp += 2;
+                        rem -= 2;
+                }
+        } else {
+                snprintf(cp, rem, ".%x", *up++);
+                while (up < uplim) {
+                        while (*cp) {
+                                cp++;
+                                rem--;
+                        }
+                        snprintf(cp, rem, "%02x", *up++);
+                }
+                cp = spectHex(cp2);
+                rem = sizeof(obuf) - (cp - obuf);
+        }
+        if (port) {
+                snprintf(cp, rem, ".%x", port);
+                spectHex(cp + 1);
+        }
+        return (obuf);
+}
+
+static char *
+spectHex(char *p0)
+{
+        int ok = 0, nonzero = 0;
+        char *p = p0;
+
+        for (; *p; p++) {
+                switch (*p) {
+                case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+                        *p += ('A' - 'a');
+                        /* fall into . . . */
+                case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+                        ok = 1;
+                case '1': case '2': case '3': case '4': case '5':
+                case '6': case '7': case '8': case '9':
+                        nonzero = 1;
+                }
+        }
+        if (nonzero && !ok) {
+                *p++ = 'H';
+                *p = 0;
+        }
+        return (p);
+}