/* * 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 <syslog.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/ioctl.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 "utils.h" #include "libbb.h" const char *ll_addr_n2a(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); } l = 0; for (i=0; i<alen; i++) { if (i==0) { snprintf(buf+l, blen, "%02x", addr[i]); blen -= 2; l += 2; } else { snprintf(buf+l, blen, ":%02x", addr[i]); blen -= 3; l += 3; } } return buf; } int ll_addr_a2n(unsigned char *lladdr, int len, char *arg) { if (strchr(arg, '.')) { inet_prefix pfx; if (get_addr_1(&pfx, arg, AF_INET)) { error_msg("\"%s\" is invalid lladdr.", 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) { error_msg("\"%s\" is invalid lladdr.", arg); return -1; } if (temp < 0 || temp > 255) { error_msg("\"%s\" is invalid lladdr.", arg); return -1; } lladdr[i] = temp; if (!cp) { break; } arg = cp; } return i+1; } }