Don't use portmapper in RPC tests

On many Linux systems, due to what is arguably a bug in rpcbind, the
portmapper doesn't allow service registration from non-root processes.
This causes the RPC tests to be frequently skipped.  Modify the tests
so that they don't need the portmapper, by grabbing the port number
from the server process and passing it to the client.

doc/build/doing_build.rst

@@ -149,9 +149,6 @@ However, there are several prerequisites that must be satisfied first:
   **-**\ **-disable-rpath**, which renders the build tree less suitable for
   installation, but allows testing without interference from
   previously installed libraries.
-* In order to test the RPC layer, the local system has to be running
-  the portmap daemon and it has to be listening to the regular network
-  interface (not just localhost).
 
 There are additional regression tests available, which are not run
 by ``make check``.  These tests require manual setup and teardown of

src/lib/rpc/unit-test/client.c

@@ -7,12 +7,15 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <netdb.h>
+#include <sys/socket.h>
 #include "autoconf.h"
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 #include <gssrpc/rpc.h>
 #include <gssapi/gssapi.h>
+#include <gssapi/gssapi_krb5.h>
 #include <gssrpc/rpc.h>
 #include <gssrpc/auth_gssapi.h>
 #include "rpc_test.h"
@@ -51,25 +54,27 @@ main(argc, argv)
    int argc;
    char **argv;
 {
-     char        *host, *target, *echo_arg, **echo_resp, buf[BIG_BUF];
-     char	 *prot;
+     char        *host, *port, *target, *echo_arg, **echo_resp, buf[BIG_BUF];
      CLIENT      *clnt;
      AUTH	 *tmp_auth;
      struct rpc_err e;
-     int i, auth_once;
+     int i, auth_once, sock, use_tcp;
      unsigned int count;
      extern int optind;
      extern char *optarg;
      extern int svc_debug_gssapi, misc_debug_gssapi, auth_debug_gssapi;
      int c;
+     struct sockaddr_in sin;
+     struct hostent *h;
+     struct timeval tv;
 
      extern int krb5_gss_dbg_client_expcreds;
      krb5_gss_dbg_client_expcreds = 1;
 
      whoami = argv[0];
      count = 1026;
      auth_once = 0;
-     prot = NULL;
+     use_tcp = -1;
 
      while ((c = getopt(argc, argv, "a:m:os:tu")) != -1) {
 	  switch (c) {
@@ -86,39 +91,60 @@ main(argc, argv)
 	       svc_debug_gssapi = atoi(optarg);
 	       break;
 	  case 't':
-	       prot = "tcp";
+	       use_tcp = 1;
 	       break;
 	  case 'u':
-	       prot = "udp";
+	       use_tcp = 0;
 	       break;
 	  case '?':
 	       usage();
 	       break;
 	  }
      }
-     if (prot == NULL)
+     if (use_tcp == -1)
 	  usage();
 
      argv += optind;
      argc -= optind;
 
      switch (argc) {
-     case 3:
-	  count = atoi(argv[2]);
+     case 4:
+	  count = atoi(argv[3]);
 	  if (count > BIG_BUF-1) {
 	    fprintf(stderr, "Test count cannot exceed %d.\n", BIG_BUF-1);
 	    usage();
 	  }
-     case 2:
+     case 3:
 	  host = argv[0];
-	  target = argv[1];
+	  port = argv[1];
+	  target = argv[2];
 	  break;
      default:
 	  usage();
      }
 
+     /* get server address */
+     h = gethostbyname(host);
+     if (h == NULL) {
+	 fprintf(stderr, "Can't resolve hostname %s\n", host);
+	 exit(1);
+     }
+     memset(&sin, 0, sizeof(sin));
+     sin.sin_family = h->h_addrtype;
+     sin.sin_port = ntohs(atoi(port));
+     memmove(&sin.sin_addr, h->h_addr, sizeof(sin.sin_addr));
+
      /* client handle to rstat */
-     clnt = clnt_create(host, RPC_TEST_PROG, RPC_TEST_VERS_1, prot);
+     sock = RPC_ANYSOCK;
+     if (use_tcp) {
+	 clnt = clnttcp_create(&sin, RPC_TEST_PROG, RPC_TEST_VERS_1, &sock, 0,
+			       0);
+     } else {
+	 tv.tv_sec = 5;
+	 tv.tv_usec = 0;
+	 clnt = clntudp_create(&sin, RPC_TEST_PROG, RPC_TEST_VERS_1, tv,
+			       &sock);
+     }
      if (clnt == NULL) {
 	  clnt_pcreateerror(whoami);
 	  exit(1);

src/lib/rpc/unit-test/config/unix.exp

@@ -112,10 +112,6 @@ proc rpc_test_exit {} {
 	global server_started
 	global kill
 
-        if { [info exists server_started] && $server_started == 0 } { 
-	    return 
-	}
-
  	if {[catch {
 		expect {
 			-i $server_id
@@ -138,6 +134,7 @@ proc rpc_test_start { } {
 	global server_id
 	global server_pid
 	global server_started
+	global server_port
 	global env
 
 	if [info exists server_pid] { rpc_test_exit }
@@ -148,25 +145,17 @@ proc rpc_test_start { } {
 	set server_pid [spawn $SERVER $PROT]
 	set server_id $spawn_id
         set server_started 1
+	set server_port -1
 
 	unset env(KRB5_KTNAME)
 
 	set timeout 30
 
 	expect {
+		-re "port: (\[0-9\]*)\r\n" {
+			set server_port $expect_out(1,string)
+		}
 		"running" { }
-	        "Cannot register service" {
-		        send_error "Server cannot register with portmap/rpcbind!!\n"
-		        note "+++"
-		        note "+++ These tests require the ability to register with portmap/rpcbind"
-		        note "+++ Either the server is not running or it does not"
-		        note "+++  allow registration using a loopback connection"
-		        note "+++"
-		        verbose $expect_out(buffer) 1
-		        set server_started 0
-		        unsupported "Server registration"
-		        return
-	        }
 		eof { 
 			send_error "server exited!"
 			verbose $expect_out(buffer) 1

src/lib/rpc/unit-test/lib/helpers.exp

@@ -170,7 +170,7 @@ proc flush_server {} {
 
 proc start_client {testname ccname user password lifetime count
 		  {target ""}} {
-	global env CLIENT PROT hostname spawn_id verbose
+	global env CLIENT PROT hostname server_port spawn_id verbose
 
 	if {$target == ""} {
 		set target "server@$hostname"
@@ -180,9 +180,9 @@ proc start_client {testname ccname user password lifetime count
 	kinit $user $password $lifetime
 
 	if {$verbose > 0} {
-		spawn $CLIENT -a 1 -s 1 -m 1 $PROT $hostname $target $count
+		spawn $CLIENT -a 1 -s 1 -m 1 $PROT $hostname $server_port $target $count
 	} else {
-		spawn $CLIENT $PROT $hostname $target $count
+		spawn $CLIENT $PROT $hostname $server_port $target $count
 	}
 
 	verbose "$testname: client $ccname started"

src/lib/rpc/unit-test/server.c

@@ -114,12 +114,13 @@ main(int argc, char **argv)
 	  exit(1);
      }
      if (!svc_register(transp, RPC_TEST_PROG, RPC_TEST_VERS_1,
-		       rpc_test_prog_1_svc, prot)) {
+		       rpc_test_prog_1_svc, 0)) {
 	  fprintf(stderr,
 		  "unable to register (RPC_TEST_PROG, RPC_TEST_VERS_1, %s).",
 		  prot == IPPROTO_TCP ? "tcp" : "udp");
 	  exit(1);
      }
+     printf("port: %d\n", (int)transp->xp_port);
 
      if (svcauth_gssapi_set_names(names, 0) == FALSE) {
 	  fprintf(stderr, "unable to set gssapi names\n");