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path: root/sysdeps/posix/getaddrinfo.c
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Diffstat (limited to 'sysdeps/posix/getaddrinfo.c')
-rw-r--r--sysdeps/posix/getaddrinfo.c143
1 files changed, 91 insertions, 52 deletions
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 18dccd5924..3d9bea60c6 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -458,11 +458,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (name != NULL)
{
- at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used);
- at->family = AF_UNSPEC;
- at->scopeid = 0;
- at->next = NULL;
-
if (req->ai_flags & AI_IDN)
{
char *out;
@@ -473,13 +468,21 @@ gaih_inet (const char *name, const struct gaih_service *service,
malloc_name = true;
}
- if (__inet_aton_exact (name, (struct in_addr *) at->addr) != 0)
+ uint32_t addr[4];
+ if (__inet_aton_exact (name, (struct in_addr *) addr) != 0)
{
+ at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used);
+ at->scopeid = 0;
+ at->next = NULL;
+
if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET)
- at->family = AF_INET;
+ {
+ memcpy (at->addr, addr, sizeof (at->addr));
+ at->family = AF_INET;
+ }
else if (req->ai_family == AF_INET6 && (req->ai_flags & AI_V4MAPPED))
{
- at->addr[3] = at->addr[0];
+ at->addr[3] = addr[0];
at->addr[2] = htonl (0xffff);
at->addr[1] = 0;
at->addr[0] = 0;
@@ -493,49 +496,62 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (req->ai_flags & AI_CANONNAME)
canon = name;
+
+ goto process_list;
}
- else if (at->family == AF_UNSPEC)
+
+ char *scope_delim = strchr (name, SCOPE_DELIMITER);
+ int e;
+
+ if (scope_delim == NULL)
+ e = inet_pton (AF_INET6, name, addr);
+ else
+ e = __inet_pton_length (AF_INET6, name, scope_delim - name, addr);
+
+ if (e > 0)
{
- char *scope_delim = strchr (name, SCOPE_DELIMITER);
- int e;
- if (scope_delim == NULL)
- e = inet_pton (AF_INET6, name, at->addr);
+ at = alloca_account (sizeof (struct gaih_addrtuple),
+ alloca_used);
+ at->scopeid = 0;
+ at->next = NULL;
+
+ if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
+ {
+ memcpy (at->addr, addr, sizeof (at->addr));
+ at->family = AF_INET6;
+ }
+ else if (req->ai_family == AF_INET
+ && IN6_IS_ADDR_V4MAPPED (addr))
+ {
+ at->addr[0] = addr[3];
+ at->addr[1] = addr[1];
+ at->addr[2] = addr[2];
+ at->addr[3] = addr[3];
+ at->family = AF_INET;
+ }
else
- e = __inet_pton_length (AF_INET6, name, scope_delim - name,
- at->addr);
- if (e > 0)
{
- if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
- at->family = AF_INET6;
- else if (req->ai_family == AF_INET
- && IN6_IS_ADDR_V4MAPPED (at->addr))
- {
- at->addr[0] = at->addr[3];
- at->family = AF_INET;
- }
- else
- {
- result = -EAI_ADDRFAMILY;
- goto free_and_return;
- }
-
- if (scope_delim != NULL
- && __inet6_scopeid_pton ((struct in6_addr *) at->addr,
- scope_delim + 1,
- &at->scopeid) != 0)
- {
- result = -EAI_NONAME;
- goto free_and_return;
- }
+ result = -EAI_ADDRFAMILY;
+ goto free_and_return;
+ }
- if (req->ai_flags & AI_CANONNAME)
- canon = name;
+ if (scope_delim != NULL
+ && __inet6_scopeid_pton ((struct in6_addr *) at->addr,
+ scope_delim + 1,
+ &at->scopeid) != 0)
+ {
+ result = -EAI_NONAME;
+ goto free_and_return;
}
+
+ if (req->ai_flags & AI_CANONNAME)
+ canon = name;
+
+ goto process_list;
}
- if (at->family == AF_UNSPEC && (req->ai_flags & AI_NUMERICHOST) == 0)
+ if ((req->ai_flags & AI_NUMERICHOST) == 0)
{
- struct gaih_addrtuple **pat = &at;
int no_data = 0;
int no_inet6_data = 0;
nss_action_list nip;
@@ -543,6 +559,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
enum nss_status status = NSS_STATUS_UNAVAIL;
int no_more;
struct resolv_context *res_ctx = NULL;
+ bool do_merge = false;
/* If we do not have to look for IPv6 addresses or the canonical
name, use the simple, old functions, which do not support
@@ -579,7 +596,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
result = -EAI_MEMORY;
goto free_and_return;
}
- *pat = addrmem;
+ at = addrmem;
}
else
{
@@ -632,6 +649,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
struct gaih_addrtuple *addrfree = addrmem;
+ struct gaih_addrtuple **pat = &at;
+
for (int i = 0; i < air->naddrs; ++i)
{
socklen_t size = (air->family[i] == AF_INET
@@ -695,12 +714,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
free (air);
- if (at->family == AF_UNSPEC)
- {
- result = -EAI_NONAME;
- goto free_and_return;
- }
-
goto process_list;
}
else if (err == 0)
@@ -732,6 +745,22 @@ gaih_inet (const char *name, const struct gaih_service *service,
while (!no_more)
{
+ /* Always start afresh; continue should discard previous results
+ and the hosts database does not support merge. */
+ at = NULL;
+ free (canonbuf);
+ free (addrmem);
+ canon = canonbuf = NULL;
+ addrmem = NULL;
+ got_ipv6 = false;
+
+ if (do_merge)
+ {
+ __set_h_errno (NETDB_INTERNAL);
+ __set_errno (EBUSY);
+ break;
+ }
+
no_data = 0;
nss_gethostbyname4_r *fct4 = NULL;
@@ -744,12 +773,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
{
while (1)
{
- status = DL_CALL_FCT (fct4, (name, pat,
+ status = DL_CALL_FCT (fct4, (name, &at,
tmpbuf->data, tmpbuf->length,
&errno, &h_errno,
NULL));
if (status == NSS_STATUS_SUCCESS)
break;
+ /* gethostbyname4_r may write into AT, so reset it. */
+ at = NULL;
if (status != NSS_STATUS_TRYAGAIN
|| errno != ERANGE || h_errno != NETDB_INTERNAL)
{
@@ -774,7 +805,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
no_data = 1;
if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL)
- canon = (*pat)->name;
+ canon = at->name;
+
+ struct gaih_addrtuple **pat = &at;
while (*pat != NULL)
{
@@ -826,6 +859,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (fct != NULL)
{
+ struct gaih_addrtuple **pat = &at;
+
if (req->ai_family == AF_INET6
|| req->ai_family == AF_UNSPEC)
{
@@ -899,6 +934,10 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (nss_next_action (nip, status) == NSS_ACTION_RETURN)
break;
+ /* The hosts database does not support MERGE. */
+ if (nss_next_action (nip, status) == NSS_ACTION_MERGE)
+ do_merge = true;
+
nip++;
if (nip->module == NULL)
no_more = -1;
@@ -930,7 +969,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
process_list:
- if (at->family == AF_UNSPEC)
+ if (at == NULL)
{
result = -EAI_NONAME;
goto free_and_return;
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-02-02 03:01:08 +0000