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-rw-r--r--lib/ll_addr.c95
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;
+ }
+}