1 files changed, 148 insertions, 0 deletions

diff --git a/src/lib/libc/net/linkaddr.c b/src/lib/libc/net/linkaddr.c
new file mode 100644
index 0000000000..ac96f3acdf
--- /dev/null
+++ b/src/lib/libc/net/linkaddr.c
@@ -0,0 +1,148 @@
+/*      $OpenBSD: linkaddr.c,v 1.5 2005/08/06 20:30:03 espie Exp $ */
+/*-
+ * Copyright (c) 1990, 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.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if_dl.h>
+#include <string.h>
+
+/* States*/
+#define NAMING  0
+#define GOTONE  1
+#define GOTTWO  2
+#define RESET   3
+/* Inputs */
+#define DIGIT   (4*0)
+#define END     (4*1)
+#define DELIM   (4*2)
+#define LETTER  (4*3)
+
+void
+link_addr(const char *addr, struct sockaddr_dl *sdl)
+{
+        char *cp = sdl->sdl_data;
+        char *cplim = sdl->sdl_len + (char *)sdl;
+        int byte = 0, state = NAMING, new;
+
+        bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1);
+        sdl->sdl_family = AF_LINK;
+        do {
+                state &= ~LETTER;
+                if ((*addr >= '0') && (*addr <= '9')) {
+                        new = *addr - '0';
+                } else if ((*addr >= 'a') && (*addr <= 'f')) {
+                        new = *addr - 'a' + 10;
+                } else if ((*addr >= 'A') && (*addr <= 'F')) {
+                        new = *addr - 'A' + 10;
+                } else if (*addr == 0) {
+                        state |= END;
+                } else if (state == NAMING &&
+                           (((*addr >= 'A') && (*addr <= 'Z')) ||
+                           ((*addr >= 'a') && (*addr <= 'z'))))
+                        state |= LETTER;
+                else
+                        state |= DELIM;
+                addr++;
+                switch (state /* | INPUT */) {
+                case NAMING | DIGIT:
+                case NAMING | LETTER:
+                        *cp++ = addr[-1];
+                        continue;
+                case NAMING | DELIM:
+                        state = RESET;
+                        sdl->sdl_nlen = cp - sdl->sdl_data;
+                        continue;
+                case GOTTWO | DIGIT:
+                        *cp++ = byte;
+                        /* FALLTHROUGH */
+                case RESET | DIGIT:
+                        state = GOTONE;
+                        byte = new;
+                        continue;
+                case GOTONE | DIGIT:
+                        state = GOTTWO;
+                        byte = new + (byte << 4);
+                        continue;
+                default: /* | DELIM */
+                        state = RESET;
+                        *cp++ = byte;
+                        byte = 0;
+                        continue;
+                case GOTONE | END:
+                case GOTTWO | END:
+                        *cp++ = byte;
+                        /* FALLTHROUGH */
+                case RESET | END:
+                        break;
+                }
+                break;
+        } while (cp < cplim); 
+        sdl->sdl_alen = cp - LLADDR(sdl);
+        new = cp - (char *)sdl;
+        if (new > sizeof(*sdl))
+                sdl->sdl_len = new;
+        return;
+}
+
+static char hexlist[] = "0123456789abcdef";
+
+char *
+link_ntoa(const struct sockaddr_dl *sdl)
+{
+        static char obuf[64];
+        char *out = obuf; 
+        int i;
+        u_char *in = (u_char *)LLADDR(sdl);
+        u_char *inlim = in + sdl->sdl_alen;
+        int firsttime = 1;
+
+        if (sdl->sdl_nlen) {
+                bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
+                out += sdl->sdl_nlen;
+                if (sdl->sdl_alen)
+                        *out++ = ':';
+        }
+        while (in < inlim) {
+                if (firsttime)
+                        firsttime = 0;
+                else
+                        *out++ = '.';
+                i = *in++;
+                if (i > 0xf) {
+                        out[1] = hexlist[i & 0xf];
+                        i >>= 4;
+                        out[0] = hexlist[i];
+                        out += 2;
+                } else
+                        *out++ = hexlist[i];
+        }
+        *out = 0;
+        return (obuf);
+}