| /* |
| * 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); |
| |
| 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; |
| } |
| } |