[821] | 1 | /*
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| 2 | * ll_addr.c
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| 3 | *
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| 4 | * This program is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU General Public License
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| 6 | * as published by the Free Software Foundation; either version
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| 7 | * 2 of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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| 10 | */
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| 11 |
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| 12 | #include "libbb.h"
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| 13 |
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| 14 | #include <string.h>
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| 15 | #include <net/if_arp.h>
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| 16 |
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| 17 | #include "rt_names.h"
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| 18 | #include "utils.h"
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| 19 |
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| 20 |
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| 21 | const char *ll_addr_n2a(unsigned char *addr, int alen, int type, char *buf, int blen)
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| 22 | {
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| 23 | int i;
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| 24 | int l;
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| 25 |
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| 26 | if (alen == 4 &&
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| 27 | (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type == ARPHRD_IPGRE)) {
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| 28 | return inet_ntop(AF_INET, addr, buf, blen);
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| 29 | }
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| 30 | l = 0;
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| 31 | for (i=0; i<alen; i++) {
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| 32 | if (i==0) {
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| 33 | snprintf(buf+l, blen, "%02x", addr[i]);
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| 34 | blen -= 2;
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| 35 | l += 2;
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| 36 | } else {
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| 37 | snprintf(buf+l, blen, ":%02x", addr[i]);
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| 38 | blen -= 3;
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| 39 | l += 3;
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| 40 | }
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| 41 | }
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| 42 | return buf;
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| 43 | }
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| 44 |
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| 45 | int ll_addr_a2n(unsigned char *lladdr, int len, char *arg)
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| 46 | {
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| 47 | if (strchr(arg, '.')) {
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| 48 | inet_prefix pfx;
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| 49 | if (get_addr_1(&pfx, arg, AF_INET)) {
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| 50 | bb_error_msg("\"%s\" is invalid lladdr.", arg);
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| 51 | return -1;
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| 52 | }
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| 53 | if (len < 4) {
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| 54 | return -1;
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| 55 | }
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| 56 | memcpy(lladdr, pfx.data, 4);
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| 57 | return 4;
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| 58 | } else {
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| 59 | int i;
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| 60 |
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| 61 | for (i=0; i<len; i++) {
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| 62 | int temp;
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| 63 | char *cp = strchr(arg, ':');
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| 64 | if (cp) {
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| 65 | *cp = 0;
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| 66 | cp++;
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| 67 | }
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| 68 | if (sscanf(arg, "%x", &temp) != 1) {
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| 69 | bb_error_msg("\"%s\" is invalid lladdr.", arg);
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| 70 | return -1;
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| 71 | }
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| 72 | if (temp < 0 || temp > 255) {
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| 73 | bb_error_msg("\"%s\" is invalid lladdr.", arg);
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| 74 | return -1;
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| 75 | }
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| 76 | lladdr[i] = temp;
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| 77 | if (!cp) {
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| 78 | break;
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| 79 | }
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| 80 | arg = cp;
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| 81 | }
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| 82 | return i+1;
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| 83 | }
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| 84 | }
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