@@ -296,18 +296,43 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
return 0;
}
+/*
+ * Older kernels sent IPv6 addresses without colons. Well, at least
+ * they're fixed-length strings. Convert these addresses to have colon
+ * delimiters to make getaddrinfo happy.
+ */
+static void
+convert_inet6_addr(const char *from, char *to)
+{
+ int i = 1;
+
+ while (*from) {
+ *to++ = *from++;
+ if (!(i++ % 4) && *from)
+ *to++ = ':';
+ }
+ *to = 0;
+}
+
static int
-ip_to_fqdn(const char *ipaddr, char *host, size_t hostlen)
+ip_to_fqdn(const char *addrstr, char *host, size_t hostlen)
{
int rc;
struct addrinfo hints = { .ai_flags = AI_NUMERICHOST };
struct addrinfo *res;
+ const char *ipaddr = addrstr;
+ char converted[INET6_ADDRSTRLEN + 1];
+
+ if ((strlen(ipaddr) > INET_ADDRSTRLEN) && !strchr(ipaddr, ':')) {
+ convert_inet6_addr(ipaddr, converted);
+ ipaddr = converted;
+ }
rc = getaddrinfo(ipaddr, NULL, &hints, &res);
if (rc) {
- syslog(LOG_DEBUG, "%s: failed to resolve %s to ipaddr: %s",
- __func__, ipaddr,
- rc == EAI_SYSTEM ? strerror(errno) : gai_strerror(rc));
+ syslog(LOG_DEBUG, "%s: failed to resolve %s to "
+ "ipaddr: %s", __func__, ipaddr,
+ rc == EAI_SYSTEM ? strerror(errno) : gai_strerror(rc));
return rc;
}
Current kernels don't send IPv6 addresses with the colon delimiters, add a routine to add them when they're not present. Signed-off-by: Jeff Layton <jlayton@redhat.com> --- client/cifs.upcall.c | 33 +++++++++++++++++++++++++++++---- 1 files changed, 29 insertions(+), 4 deletions(-)