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* sysdeps/posix/getaddrinfo.c (sort_results): Remove service_order

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field.  Use sockaddr_in6 for source_addr.
	(get_scope): Change type of parameter to sockaddr_in6.  Adjust.
	(match_prefix): Likewise.
	(get_label): Likewise.
	(get_precedence): Likewise.
	(rfc3484_sort): Change to use indirect access to results array.
	Adjust to use of sockaddr_in6.  Replace service_order test with
	simple index comparison.
	(getaddrinfo): Define order array.  Initialize it.  Don't initialize
	service_order field.  Adjust qsort_t calls.  Access sorted result
	array indirectly through order array.
	* posix/tst-rfc3484.c: Adjust for change of rfc3484_sort.
	* posix/tst-rfc3484-2.c: Likewise.
	* posix/tst-rfc3484-3.c: Likewise.
This commit is contained in:
Ulrich Drepper 2008-01-10 20:00:52 +00:00
parent ab355d9aa5
commit 0efd19566d
5 changed files with 74 additions and 51 deletions
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18
ChangeLog
View File

@ -1,3 +1,21 @@
2008-01-10 Ulrich Drepper <drepper@redhat.com>
* sysdeps/posix/getaddrinfo.c (sort_results): Remove service_order
field. Use sockaddr_in6 for source_addr.
(get_scope): Change type of parameter to sockaddr_in6. Adjust.
(match_prefix): Likewise.
(get_label): Likewise.
(get_precedence): Likewise.
(rfc3484_sort): Change to use indirect access to results array.
Adjust to use of sockaddr_in6. Replace service_order test with
simple index comparison.
(getaddrinfo): Define order array. Initialize it. Don't initialize
service_order field. Adjust qsort_t calls. Access sorted result
array indirectly through order array.
* posix/tst-rfc3484.c: Adjust for change of rfc3484_sort.
* posix/tst-rfc3484-2.c: Likewise.
* posix/tst-rfc3484-3.c: Likewise.
2008-01-09 Ulrich Drepper <drepper@redhat.com>
[BZ #5541]

17
posix/tst-rfc3484-2.c
View File

@ -100,31 +100,32 @@ do_test (void)
struct sort_result results[2];
size_t order[2];
results[0].dest_addr = &ai1;
results[0].got_source_addr = true;
results[0].source_addr_len = sizeof (so1);
results[0].source_addr_flags = 0;
results[0].service_order = 0;
results[0].prefixlen = 16;
results[0].index = 0;
memcpy (&results[0].source_addr, &so1, sizeof (so1));
order[0] = 0;
results[1].dest_addr = &ai2;
results[1].got_source_addr = true;
results[1].source_addr_len = sizeof (so2);
results[1].source_addr_flags = 0;
results[1].service_order = 1;
results[1].prefixlen = 16;
results[1].index = 0;
memcpy (&results[1].source_addr, &so2, sizeof (so2));
order[1] = 1;
struct sort_result_combo combo = { .results = results, .nresults = 2 };
qsort_r (results, 2, sizeof (results[0]), rfc3484_sort, &combo);
qsort_r (order, 2, sizeof (order[0]), rfc3484_sort, &combo);
int result = 0;
if (results[0].dest_addr->ai_family == AF_INET6)
if (results[order[0]].dest_addr->ai_family == AF_INET6)
{
puts ("wrong order in first test");
result |= 1;
@ -136,24 +137,24 @@ do_test (void)
results[1].got_source_addr = true;
results[1].source_addr_len = sizeof (so1);
results[1].source_addr_flags = 0;
results[1].service_order = 1;
results[1].prefixlen = 16;
results[1].index = 0;
memcpy (&results[1].source_addr, &so1, sizeof (so1));
order[1] = 1;
results[0].dest_addr = &ai2;
results[0].got_source_addr = true;
results[0].source_addr_len = sizeof (so2);
results[0].source_addr_flags = 0;
results[0].service_order = 0;
results[0].prefixlen = 16;
results[0].index = 0;
memcpy (&results[0].source_addr, &so2, sizeof (so2));
order[0] = 0;
qsort_r (results, 2, sizeof (results[0]), rfc3484_sort, &combo);
qsort_r (order, 2, sizeof (order[0]), rfc3484_sort, &combo);
if (results[0].dest_addr->ai_family == AF_INET6)
if (results[order[0]].dest_addr->ai_family == AF_INET6)
{
puts ("wrong order in second test");
result |= 1;

8
posix/tst-rfc3484-3.c
View File

@ -66,6 +66,7 @@ struct sockaddr_in addrs[] =
#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
static struct addrinfo ais[naddrs];
static struct sort_result results[naddrs];
static size_t order[naddrs];
static const int expected[naddrs] =
{
@ -111,18 +112,19 @@ do_test (void)
memcpy(&results[i].source_addr, &so, sizeof (so));
results[i].source_addr_len = sizeof (so);
results[i].source_addr_flags = 0;
results[i].service_order = i;
results[i].prefixlen = 8;
results[i].index = 0;
order[i] = i;
}
struct sort_result_combo combo = { .results = results, .nresults = naddrs };
qsort_r (results, naddrs, sizeof (results[0]), rfc3484_sort, &combo);
qsort_r (order, naddrs, sizeof (order[0]), rfc3484_sort, &combo);
int result = 0;
for (int i = 0; i < naddrs; ++i)
{
struct in_addr addr = ((struct sockaddr_in *) (results[i].dest_addr->ai_addr))->sin_addr;
struct in_addr addr = ((struct sockaddr_in *) (results[order[i]].dest_addr->ai_addr))->sin_addr;
int here = memcmp (&addr, &addrs[expected[i]].sin_addr,
sizeof (struct in_addr));

8
posix/tst-rfc3484.c
View File

@ -64,6 +64,7 @@ struct sockaddr_in addrs[] =
#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
static struct addrinfo ais[naddrs];
static struct sort_result results[naddrs];
static size_t order[naddrs];
static int expected[naddrs] =
{
@ -100,18 +101,19 @@ do_test (void)
memcpy(&results[i].source_addr, &so, sizeof (so));
results[i].source_addr_len = sizeof (so);
results[i].source_addr_flags = 0;
results[i].service_order = i;
results[i].prefixlen = 8;
results[i].index = 0;
order[i] = i;
}
struct sort_result_combo combo = { .results = results, .nresults = naddrs };
qsort_r (results, naddrs, sizeof (results[0]), rfc3484_sort, &combo);
qsort_r (order, naddrs, sizeof (order[0]), rfc3484_sort, &combo);
int result = 0;
for (int i = 0; i < naddrs; ++i)
{
struct in_addr addr = ((struct sockaddr_in *) (results[i].dest_addr->ai_addr))->sin_addr;
struct in_addr addr = ((struct sockaddr_in *) (results[order[i]].dest_addr->ai_addr))->sin_addr;
int here = memcmp (&addr, &addrs[expected[i]].sin_addr,
sizeof (struct in_addr));

74
sysdeps/posix/getaddrinfo.c
View File

@ -997,8 +997,10 @@ gaih_inet (const char *name, const struct gaih_service *service,
struct sort_result
{
struct addrinfo *dest_addr;
struct sockaddr_storage source_addr;
size_t service_order;
/* Using sockaddr_storage is for now overkill. We only support IPv4
and IPv6 so far. If this changes at some point we can adjust the
type here. */
struct sockaddr_in6 source_addr;
uint8_t source_addr_len;
bool got_source_addr;
uint8_t source_addr_flags;
@ -1047,13 +1049,11 @@ static const struct scopeentry *scopes;
static int
get_scope (const struct sockaddr_storage *ss)
get_scope (const struct sockaddr_in6 *in6)
{
int scope;
if (ss->ss_family == PF_INET6)
if (in6->sin6_family == PF_INET6)
{
const struct sockaddr_in6 *in6 = (const struct sockaddr_in6 *) ss;
if (! IN6_IS_ADDR_MULTICAST (&in6->sin6_addr))
{
if (IN6_IS_ADDR_LINKLOCAL (&in6->sin6_addr))
@ -1067,9 +1067,9 @@ get_scope (const struct sockaddr_storage *ss)
else
scope = in6->sin6_addr.s6_addr[1] & 0xf;
}
else if (ss->ss_family == PF_INET)
else if (in6->sin6_family == PF_INET)
{
const struct sockaddr_in *in = (const struct sockaddr_in *) ss;
const struct sockaddr_in *in = (const struct sockaddr_in *) in6;
size_t cnt = 0;
while (1)
@ -1179,18 +1179,15 @@ static const struct prefixentry default_precedence[] =
static int
match_prefix (const struct sockaddr_storage *ss,
match_prefix (const struct sockaddr_in6 *in6,
const struct prefixentry *list, int default_val)
{
int idx;
struct sockaddr_in6 in6_mem;
const struct sockaddr_in6 *in6;
if (ss->ss_family == PF_INET6)
in6 = (const struct sockaddr_in6 *) ss;
else if (ss->ss_family == PF_INET)
if (in6->sin6_family == PF_INET)
{
const struct sockaddr_in *in = (const struct sockaddr_in *) ss;
const struct sockaddr_in *in = (const struct sockaddr_in *) in6;
/* Convert to IPv6 address. */
in6_mem.sin6_family = PF_INET6;
@ -1209,7 +1206,7 @@ match_prefix (const struct sockaddr_storage *ss,
in6 = &in6_mem;
}
else
else if (in6->sin6_family != PF_INET6)
return default_val;
for (idx = 0; ; ++idx)
@ -1241,18 +1238,18 @@ match_prefix (const struct sockaddr_storage *ss,
static int
get_label (const struct sockaddr_storage *ss)
get_label (const struct sockaddr_in6 *in6)
{
/* XXX What is a good default value? */
return match_prefix (ss, labels, INT_MAX);
return match_prefix (in6, labels, INT_MAX);
}
static int
get_precedence (const struct sockaddr_storage *ss)
get_precedence (const struct sockaddr_in6 *in6)
{
/* XXX What is a good default value? */
return match_prefix (ss, precedence, 0);
return match_prefix (in6, precedence, 0);
}
@ -1272,9 +1269,11 @@ fls (uint32_t a)
static int
rfc3484_sort (const void *p1, const void *p2, void *arg)
{
const struct sort_result *a1 = (const struct sort_result *) p1;
const struct sort_result *a2 = (const struct sort_result *) p2;
const size_t idx1 = *(const size_t *) p1;
const size_t idx2 = *(const size_t *) p2;
struct sort_result_combo *src = (struct sort_result_combo *) arg;
struct sort_result *a1 = &src->results[idx1];
struct sort_result *a2 = &src->results[idx2];
/* Rule 1: Avoid unusable destinations.
We have the got_source_addr flag set if the destination is reachable. */
@ -1287,10 +1286,10 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
/* Rule 2: Prefer matching scope. Only interesting if both
destination addresses are IPv6. */
int a1_dst_scope
= get_scope ((struct sockaddr_storage *) a1->dest_addr->ai_addr);
= get_scope ((struct sockaddr_in6 *) a1->dest_addr->ai_addr);
int a2_dst_scope
= get_scope ((struct sockaddr_storage *) a2->dest_addr->ai_addr);
= get_scope ((struct sockaddr_in6 *) a2->dest_addr->ai_addr);
if (a1->got_source_addr)
{
@ -1330,11 +1329,11 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
if (a1->got_source_addr)
{
int a1_dst_label
= get_label ((struct sockaddr_storage *) a1->dest_addr->ai_addr);
= get_label ((struct sockaddr_in6 *) a1->dest_addr->ai_addr);
int a1_src_label = get_label (&a1->source_addr);
int a2_dst_label
= get_label ((struct sockaddr_storage *) a2->dest_addr->ai_addr);
= get_label ((struct sockaddr_in6 *) a2->dest_addr->ai_addr);
int a2_src_label = get_label (&a2->source_addr);
if (a1_dst_label == a1_src_label && a2_dst_label != a2_src_label)
@ -1346,9 +1345,9 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
/* Rule 6: Prefer higher precedence. */
int a1_prec
= get_precedence ((struct sockaddr_storage *) a1->dest_addr->ai_addr);
= get_precedence ((struct sockaddr_in6 *) a1->dest_addr->ai_addr);
int a2_prec
= get_precedence ((struct sockaddr_storage *) a2->dest_addr->ai_addr);
= get_precedence ((struct sockaddr_in6 *) a2->dest_addr->ai_addr);
if (a1_prec > a2_prec)
return -1;
@ -1406,8 +1405,8 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
if (a1->dest_addr->ai_family == PF_INET)
{
assert (a1->source_addr.ss_family == PF_INET);
assert (a2->source_addr.ss_family == PF_INET);
assert (a1->source_addr.sin6_family == PF_INET);
assert (a2->source_addr.sin6_family == PF_INET);
/* Outside of subnets, as defined by the network masks,
common address prefixes for IPv4 addresses make no sense.
@ -1437,8 +1436,8 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
}
else if (a1->dest_addr->ai_family == PF_INET6)
{
assert (a1->source_addr.ss_family == PF_INET6);
assert (a2->source_addr.ss_family == PF_INET6);
assert (a1->source_addr.sin6_family == PF_INET6);
assert (a2->source_addr.sin6_family == PF_INET6);
struct sockaddr_in6 *in1_dst;
struct sockaddr_in6 *in1_src;
@ -1478,7 +1477,7 @@ rfc3484_sort (const void *p1, const void *p2, void *arg)
compare with the value indicating the order in which the entries
have been received from the services. NB: no two entries can have
the same order so the test will never return zero. */
return a1->service_order < a2->service_order ? -1 : 1;
return idx1 < idx2 ? -1 : 1;
}
@ -2100,6 +2099,7 @@ getaddrinfo (const char *name, const char *service,
__libc_once (once, gaiconf_init);
/* Sort results according to RFC 3484. */
struct sort_result results[nresults];
size_t order[nresults];
struct addrinfo *q;
struct addrinfo *last = NULL;
char *canonname = NULL;
@ -2115,8 +2115,8 @@ getaddrinfo (const char *name, const char *service,
for (i = 0, q = p; q != NULL; ++i, last = q, q = q->ai_next)
{
results[i].dest_addr = q;
results[i].service_order = i;
results[i].native = -1;
order[i] = i;
/* If we just looked up the address for a different
protocol, reuse the result. */
@ -2255,16 +2255,16 @@ getaddrinfo (const char *name, const char *service,
__libc_lock_lock (lock);
if (old_once && gaiconf_reload_flag)
gaiconf_reload ();
qsort_r (results, nresults, sizeof (results[0]), rfc3484_sort, &src);
qsort_r (order, nresults, sizeof (order[0]), rfc3484_sort, &src);
__libc_lock_unlock (lock);
}
else
qsort_r (results, nresults, sizeof (results[0]), rfc3484_sort, &src);
qsort_r (order, nresults, sizeof (order[0]), rfc3484_sort, &src);
/* Queue the results up as they come out of sorting. */
q = p = results[0].dest_addr;
q = p = results[order[0]].dest_addr;
for (i = 1; i < nresults; ++i)
q = q->ai_next = results[i].dest_addr;
q = q->ai_next = results[order[i]].dest_addr;
q->ai_next = NULL;
/* Fill in the canonical name into the new first entry. */