mountd: Use static buffer when constructing junction export options

[nfs-utils.git] / utils / statd / simu.c

diff --git a/utils/statd/simu.c b/utils/statd/simu.c
index 78a6ee2e9d6cc059d233b11c4efa8ef9631ff2af..f1d0bf886f3dfb5caf87ebdeb38406a75db4b329 100644 (file)
--- a/utils/statd/simu.c
+++ b/utils/statd/simu.c
@@ -4,7 +4,15 @@
  * NSM for Linux.
  */
 
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#include "sockaddr.h"
+#include "rpcmisc.h"
 #include "statd.h"
 #include "notlist.h"
 
@@ -13,17 +21,39 @@ extern void my_svc_exit (void);
 
 /*
  * Services SM_SIMU_CRASH requests.
+ *
+ * Although the kernel contacts the statd service via only IPv4
+ * transports, the statd service can receive other requests, such
+ * as SM_NOTIFY, from remote peers via IPv6.
  */
 void *
-sm_simu_crash_1_svc (void *argp, struct svc_req *rqstp)
+sm_simu_crash_1_svc (__attribute__ ((unused)) void *argp, struct svc_req *rqstp)
 {
+  struct sockaddr *sap = nfs_getrpccaller(rqstp->rq_xprt);
+  char buf[INET6_ADDRSTRLEN];
   static char *result = NULL;
 
-  note (N_WARNING, "*** SIMULATING CRASH! ***");
+  xlog(D_CALL, "Received SM_SIMU_CRASH");
+
+  if (!nfs_is_v4_loopback(sap))
+    goto out_nonlocal;
+
+  if ((int)nfs_get_port(sap) >= IPPORT_RESERVED) {
+    xlog_warn("SM_SIMU_CRASH call from unprivileged port");
+    goto failure;
+  }
+
   my_svc_exit ();
 
   if (rtnl)
     nlist_kill (&rtnl);
 
+ failure:
   return ((void *)&result);
+
+ out_nonlocal:
+  if (!statd_present_address(sap, buf, sizeof(buf)))
+    buf[0] = '\0';
+  xlog_warn("SM_SIMU_CRASH call from non-local host %s", buf);
+  goto failure;
 }