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IPv6 address parser: fail on incomplete addresses

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This commit is contained in:
Maria Matejka 2019-08-14 12:29:04 +02:00
parent f31be45de1
commit b691f99d8d
3 changed files with 43 additions and 14 deletions
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5
lib/ip.c
View File

@ -264,6 +264,9 @@ ip6_pton(const char *a, ip6_addr *o)
int i, j, k, l, hfil;
const char *start;
if (!a[0]) /* Empty string check */
return 0;
if (a[0] == ':') /* Leading :: */
{
if (a[1] != ':')
@ -333,6 +336,8 @@ ip6_pton(const char *a, ip6_addr *o)
for (; i>=hfil; i--)
words[i] = 0;
}
else if (i != 8) /* Incomplete address */
return 0;
/* Convert the address to ip6_addr format */
for (i=0; i<4; i++)

47
lib/ip_test.c
View File

@ -13,26 +13,39 @@
#define IP4_MAX_LEN 16
static int
test_ipa_pton(void *out_, const void *in_, const void *expected_out_)
test_ip4_pton(void *out_, const void *in_, const void *expected_out_)
{
ip_addr *out = out_;
const char *in = in_;
const ip_addr *expected_out = expected_out_;
ip4_addr ip4;
if (expected_out)
{
bt_assert(ip4_pton(in, &ip4));
*out = ipa_from_ip4(ip4);
return ipa_equal(*out, *expected_out);
}
else
return !ip4_pton(in, &ip4);
}
static int
test_ip6_pton(void *out_, const void *in_, const void *expected_out_)
{
ip_addr *out = out_;
const char *in = in_;
const ip_addr *expected_out = expected_out_;
if (ipa_is_ip4(*expected_out))
{
ip4_addr ip4;
bt_assert(ip4_pton(in, &ip4));
*out = ipa_from_ip4(ip4);
}
else
if (expected_out)
{
bt_assert(ip6_pton(in, out));
/* ip_addr == ip6_addr */
}
return ipa_equal(*out, *expected_out);
}
else
return !ip6_pton(in, out);
}
static int
t_ip4_pton(void)
@ -52,7 +65,7 @@ t_ip4_pton(void)
},
};
return bt_assert_batch(test_vectors, test_ipa_pton, bt_fmt_str, bt_fmt_ipa);
return bt_assert_batch(test_vectors, test_ip4_pton, bt_fmt_str, bt_fmt_ipa);
}
static int
@ -87,9 +100,17 @@ t_ip6_pton(void)
.in = "2605:2700:0:3::4713:93e3",
.out = & ipa_build6(0x26052700, 0x00000003, 0x00000000, 0x471393E3),
},
{
.in = "2605:2700:0:3:4713:93e3",
.out = NULL,
},
{
.in = "2",
.out = NULL,
},
};
return bt_assert_batch(test_vectors, test_ipa_pton, bt_fmt_str, bt_fmt_ipa);
return bt_assert_batch(test_vectors, test_ip6_pton, bt_fmt_str, bt_fmt_ipa);
}
static int

3
test/birdtest.c
View File

@ -495,7 +495,10 @@ void
bt_fmt_ipa(char *buf, size_t size, const void *data)
{
const ip_addr *ip = data;
if (data)
bsnprintf(buf, size, "%I", *ip);
else
bsnprintf(buf, size, "(null)");
}
int