1 files changed, 95 insertions, 0 deletions
diff --git a/lib/ll_addr.c b/lib/ll_addr.c
new file mode 100644
index 0000000..d6fd736
--- /dev/null
+++ b/lib/ll_addr.c
@@ -0,0 +1,95 @@
+/*
+ * ll_addr.c
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/sockios.h>
+
+#include "rt_names.h"
+#include "utils.h"
+
+const char *ll_addr_n2a(const unsigned char *addr, int alen, int type,
+			char *buf, int blen)
+{
+	int i;
+	int l;
+
+	if (alen == 4 &&
+	    (type == ARPHRD_TUNNEL || type == ARPHRD_SIT
+	     || type == ARPHRD_IPGRE))
+		return inet_ntop(AF_INET, addr, buf, blen);
+
+	if (alen == 16 && (type == ARPHRD_TUNNEL6 || type == ARPHRD_IP6GRE))
+		return inet_ntop(AF_INET6, addr, buf, blen);
+	if (alen == 7 && type == ARPHRD_AX25)
+		return ax25_ntop(AF_AX25, addr, buf, blen);
+	if (alen == 7 && type == ARPHRD_NETROM)
+		return netrom_ntop(AF_NETROM, addr, buf, blen);
+	if (alen == 5 && type == ARPHRD_ROSE)
+		return rose_ntop(AF_ROSE, addr, buf, blen);
+
+	snprintf(buf, blen, "%02x", addr[0]);
+	for (i = 1, l = 2; i < alen && l < blen; i++, l += 3)
+		snprintf(buf + l, blen - l, ":%02x", addr[i]);
+	return buf;
+}
+
+/*NB: lladdr is char * (rather than u8 *) because sa_data is char * (1003.1g) */
+int ll_addr_a2n(char *lladdr, int len, const char *arg)
+{
+	if (strchr(arg, '.')) {
+		inet_prefix pfx;
+		if (get_addr_1(&pfx, arg, AF_INET)) {
+			fprintf(stderr, "\"%s\" is invalid lladdr.\n", arg);
+			return -1;
+		}
+		if (len < 4)
+			return -1;
+		memcpy(lladdr, pfx.data, 4);
+		return 4;
+	} else {
+		int i;
+
+		for (i = 0; i < len; i++) {
+			int temp;
+			char *cp = strchr(arg, ':');
+			if (cp) {
+				*cp = 0;
+				cp++;
+			}
+			if (sscanf(arg, "%x", &temp) != 1) {
+				fprintf(stderr, "\"%s\" is invalid lladdr.\n",
+					arg);
+				return -1;
+			}
+			if (temp < 0 || temp > 255) {
+				fprintf(stderr, "\"%s\" is invalid lladdr.\n",
+					arg);
+				return -1;
+			}
+			lladdr[i] = temp;
+			if (!cp)
+				break;
+			arg = cp;
+		}
+		return i + 1;
+	}
+}