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/*
* convert from ASCII form of address/subnet/range to binary
* Copyright (C) 1998, 1999 Henry Spencer.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/lgpl.txt>.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
* License for more details.
*/
#include "internal.h"
#include "freeswan.h"
/*
- atoasr - convert ASCII to address, subnet, or range
*/
const char * /* NULL for success, else string literal */
atoasr(src, srclen, typep, addrsp)
const char *src;
size_t srclen; /* 0 means "apply strlen" */
char *typep; /* return type code: 'a', 's', 'r' */
struct in_addr addrsp[2];
{
const char *punct;
const char *stop;
const char *oops;
if (srclen == 0)
srclen = strlen(src);
if (srclen == 0)
return "empty string";
/* subnet is easy to spot */
punct = memchr(src, '/', srclen);
if (punct != NULL) {
*typep = 's';
return atosubnet(src, srclen, &addrsp[0], &addrsp[1]);
}
/* try for a range */
stop = src + srclen;
for (punct = src; (punct = memchr(punct, '.', stop - punct)) != NULL;
punct++)
if (stop - punct > 3 && *(punct+1) == '.' && *(punct+2) == '.')
break; /* NOTE BREAK OUT */
if (punct == NULL) {
/* didn't find the range delimiter, must be plain address */
*typep = 'a';
return atoaddr(src, srclen, &addrsp[0]);
}
/* looks like a range */
*typep = 'r';
if (stop - punct > 4 && *(punct+3) == '.')
punct++; /* first dot is trailing dot of name */
oops = atoaddr(src, punct - src, &addrsp[0]);
if (oops != NULL)
return oops;
oops = atoaddr(punct+3, stop - (punct+3), &addrsp[1]);
if (oops != NULL)
return oops;
if (ntohl(addrsp[0].s_addr) > ntohl(addrsp[1].s_addr))
return "invalid range, begin > end";
return NULL;
}
#ifdef ATOASR_MAIN
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
void regress(void);
int
main(int argc, char *argv[])
{
struct in_addr a[2];
char buf[100];
const char *oops;
size_t n;
char type;
if (argc < 2) {
fprintf(stderr, "Usage: %s {addr|net/mask|begin...end|-r}\n",
argv[0]);
exit(2);
}
if (strcmp(argv[1], "-r") == 0) {
regress();
fprintf(stderr, "regress() returned?!?\n");
exit(1);
}
oops = atoasr(argv[1], 0, &type, a);
if (oops != NULL) {
fprintf(stderr, "%s: conversion failed: %s\n", argv[0], oops);
exit(1);
}
switch (type) {
case 'a':
n = addrtoa(a[0], 0, buf, sizeof(buf));
break;
case 's':
n = subnettoa(a[0], a[1], 0, buf, sizeof(buf));
break;
case 'r':
n = rangetoa(a, 0, buf, sizeof(buf));
break;
default:
fprintf(stderr, "%s: unknown type '%c'\n", argv[0], type);
exit(1);
break;
}
if (n > sizeof(buf)) {
fprintf(stderr, "%s: reverse conversion of ", argv[0]);
fprintf(stderr, "%s ", inet_ntoa(a[0]));
fprintf(stderr, "%s", inet_ntoa(a[1]));
fprintf(stderr, " failed: need %ld bytes, have only %ld\n",
(long)n, (long)sizeof(buf));
exit(1);
}
printf("%s\n", buf);
exit(0);
}
struct rtab {
char *input;
char *output; /* NULL means error expected */
} rtab[] = {
{"1.2.3.0", "1.2.3.0"},
{"1.2.3.0/255.255.255.0", "1.2.3.0/24"},
{"1.2.3.0...1.2.3.5", "1.2.3.0...1.2.3.5"},
{"1.2.3.4.5", NULL},
{"1.2.3.4/", NULL},
{"1.2.3.4...", NULL},
{"1.2.3.4....", NULL},
{"localhost/32", "127.0.0.1/32"},
{"localhost...127.0.0.3", "127.0.0.1...127.0.0.3"},
{"127.0.0.0...localhost", "127.0.0.0...127.0.0.1"},
{"127.0.0.3...localhost", NULL},
{NULL, NULL}
};
void
regress(void)
{
struct rtab *r;
int status = 0;
struct in_addr a[2];
char in[100];
char buf[100];
const char *oops;
size_t n;
char type;
for (r = rtab; r->input != NULL; r++) {
strcpy(in, r->input);
oops = atoasr(in, 0, &type, a);
if (oops != NULL && r->output == NULL)
{} /* okay, error expected */
else if (oops != NULL) {
printf("`%s' atoasr failed: %s\n", r->input, oops);
status = 1;
} else if (r->output == NULL) {
printf("`%s' atoasr succeeded unexpectedly '%c'\n",
r->input, type);
status = 1;
} else {
switch (type) {
case 'a':
n = addrtoa(a[0], 0, buf, sizeof(buf));
break;
case 's':
n = subnettoa(a[0], a[1], 0, buf, sizeof(buf));
break;
case 'r':
n = rangetoa(a, 0, buf, sizeof(buf));
break;
default:
fprintf(stderr, "`%s' unknown type '%c'\n",
r->input, type);
n = 0;
status = 1;
break;
}
if (n > sizeof(buf)) {
printf("`%s' '%c' reverse failed: need %ld\n",
r->input, type, (long)n);
status = 1;
} else if (n > 0 && strcmp(r->output, buf) != 0) {
printf("`%s' '%c' gave `%s', expected `%s'\n",
r->input, type, buf, r->output);
status = 1;
}
}
}
exit(status);
}
#endif /* ATOASR_MAIN */
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