You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
glibc/SOURCES/glibc-RHEL-2426-11.patch

209 lines
5.9 KiB

commit 92478a808f477480adbc5ca3d9a4a1bc27fc13ae
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Mon Mar 7 20:38:31 2022 +0530
gaih_inet: Split result generation into its own function
Simplify the loop a wee bit and clean up variable names too.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit ac4653ef503d1e87893d1a6714748a1cdf4bf7ad)
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 827c43b369836de9..1008f247365ea009 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -1030,6 +1030,87 @@ get_local_addresses (const struct addrinfo *req, struct gaih_result *res)
}
}
+/* Generate results in PAI and its count in NADDRS. Return 0 on success or an
+ error code on failure. */
+
+static int
+generate_addrinfo (const struct addrinfo *req, struct gaih_result *res,
+ const struct gaih_servtuple *st, struct addrinfo **pai,
+ unsigned int *naddrs)
+{
+ size_t socklen;
+ sa_family_t family;
+
+ /* Buffer is the size of an unformatted IPv6 address in printable format. */
+ for (struct gaih_addrtuple *at = res->at; at != NULL; at = at->next)
+ {
+ family = at->family;
+ if (family == AF_INET6)
+ {
+ socklen = sizeof (struct sockaddr_in6);
+
+ /* If we looked up IPv4 mapped address discard them here if
+ the caller isn't interested in all address and we have
+ found at least one IPv6 address. */
+ if (res->got_ipv6
+ && (req->ai_flags & (AI_V4MAPPED|AI_ALL)) == AI_V4MAPPED
+ && IN6_IS_ADDR_V4MAPPED (at->addr))
+ continue;
+ }
+ else
+ socklen = sizeof (struct sockaddr_in);
+
+ for (int i = 0; st[i].set; i++)
+ {
+ struct addrinfo *ai;
+ ai = *pai = malloc (sizeof (struct addrinfo) + socklen);
+ if (ai == NULL)
+ return -EAI_MEMORY;
+
+ ai->ai_flags = req->ai_flags;
+ ai->ai_family = family;
+ ai->ai_socktype = st[i].socktype;
+ ai->ai_protocol = st[i].protocol;
+ ai->ai_addrlen = socklen;
+ ai->ai_addr = (void *) (ai + 1);
+
+ /* We only add the canonical name once. */
+ ai->ai_canonname = res->canon;
+ res->canon = NULL;
+
+#ifdef _HAVE_SA_LEN
+ ai->ai_addr->sa_len = socklen;
+#endif /* _HAVE_SA_LEN */
+ ai->ai_addr->sa_family = family;
+
+ /* In case of an allocation error the list must be NULL
+ terminated. */
+ ai->ai_next = NULL;
+
+ if (family == AF_INET6)
+ {
+ struct sockaddr_in6 *sin6p = (struct sockaddr_in6 *) ai->ai_addr;
+ sin6p->sin6_port = st[i].port;
+ sin6p->sin6_flowinfo = 0;
+ memcpy (&sin6p->sin6_addr, at->addr, sizeof (struct in6_addr));
+ sin6p->sin6_scope_id = at->scopeid;
+ }
+ else
+ {
+ struct sockaddr_in *sinp = (struct sockaddr_in *) ai->ai_addr;
+ sinp->sin_port = st[i].port;
+ memcpy (&sinp->sin_addr, at->addr, sizeof (struct in_addr));
+ memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero));
+ }
+
+ pai = &(ai->ai_next);
+ }
+
+ ++*naddrs;
+ }
+ return 0;
+}
+
static int
gaih_inet (const char *name, const struct gaih_service *service,
const struct addrinfo *req, struct addrinfo **pai,
@@ -1096,98 +1177,13 @@ gaih_inet (const char *name, const struct gaih_service *service,
goto free_and_return;
process_list:
- {
- /* Set up the canonical name if we need it. */
- if ((result = process_canonname (req, orig_name, &res)) != 0)
- goto free_and_return;
-
- struct gaih_addrtuple *at2 = res.at;
- size_t socklen;
- sa_family_t family;
-
- /*
- buffer is the size of an unformatted IPv6 address in printable format.
- */
- while (at2 != NULL)
- {
- family = at2->family;
- if (family == AF_INET6)
- {
- socklen = sizeof (struct sockaddr_in6);
-
- /* If we looked up IPv4 mapped address discard them here if
- the caller isn't interested in all address and we have
- found at least one IPv6 address. */
- if (res.got_ipv6
- && (req->ai_flags & (AI_V4MAPPED|AI_ALL)) == AI_V4MAPPED
- && IN6_IS_ADDR_V4MAPPED (at2->addr))
- goto ignore;
- }
- else
- socklen = sizeof (struct sockaddr_in);
-
- for (int i = 0; st[i].set; i++)
- {
- struct addrinfo *ai;
- ai = *pai = malloc (sizeof (struct addrinfo) + socklen);
- if (ai == NULL)
- {
- result = -EAI_MEMORY;
- goto free_and_return;
- }
-
- ai->ai_flags = req->ai_flags;
- ai->ai_family = family;
- ai->ai_socktype = st[i].socktype;
- ai->ai_protocol = st[i].protocol;
- ai->ai_addrlen = socklen;
- ai->ai_addr = (void *) (ai + 1);
-
- /* We only add the canonical name once. */
- ai->ai_canonname = res.canon;
- res.canon = NULL;
-
-#ifdef _HAVE_SA_LEN
- ai->ai_addr->sa_len = socklen;
-#endif /* _HAVE_SA_LEN */
- ai->ai_addr->sa_family = family;
-
- /* In case of an allocation error the list must be NULL
- terminated. */
- ai->ai_next = NULL;
-
- if (family == AF_INET6)
- {
- struct sockaddr_in6 *sin6p =
- (struct sockaddr_in6 *) ai->ai_addr;
-
- sin6p->sin6_port = st[i].port;
- sin6p->sin6_flowinfo = 0;
- memcpy (&sin6p->sin6_addr,
- at2->addr, sizeof (struct in6_addr));
- sin6p->sin6_scope_id = at2->scopeid;
- }
- else
- {
- struct sockaddr_in *sinp =
- (struct sockaddr_in *) ai->ai_addr;
- sinp->sin_port = st[i].port;
- memcpy (&sinp->sin_addr,
- at2->addr, sizeof (struct in_addr));
- memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero));
- }
-
- pai = &(ai->ai_next);
- }
-
- ++*naddrs;
+ /* Set up the canonical name if we need it. */
+ if ((result = process_canonname (req, orig_name, &res)) != 0)
+ goto free_and_return;
- ignore:
- at2 = at2->next;
- }
- }
+ result = generate_addrinfo (req, &res, st, pai, naddrs);
- free_and_return:
+free_and_return:
if (malloc_name)
free ((char *) name);
free (addrmem);