Improve command error handling.

Exit with non-zero exit code if server mode has too many errors.

Properly detect complain about non-numeric arguments to -A, -L, and -S.

Implement range checks for argument to -S.

Fixes #316.

src/iperf_api.c

@@ -662,6 +662,7 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
     int flag;
     int blksize;
     int server_flag, client_flag, rate_flag, duration_flag;
+    char *endptr;
 #if defined(HAVE_CPU_AFFINITY)
     char* comma;
 #endif /* HAVE_CPU_AFFINITY */
@@ -825,13 +826,20 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
                 test->settings->domain = AF_INET6;
                 break;
             case 'S':
-                test->settings->tos = strtol(optarg, NULL, 0);
+                test->settings->tos = strtol(optarg, &endptr, 0);
+		if (endptr == optarg ||
+		    test->settings->tos < 0 ||
+		    test->settings->tos > 255) {
+		    i_errno = IEBADTOS;
+		    return -1;
+		}
 		client_flag = 1;
                 break;
             case 'L':
 #if defined(HAVE_FLOWLABEL)
-                test->settings->flowlabel = strtol(optarg, NULL, 0);
+                test->settings->flowlabel = strtol(optarg, &endptr, 0);
-		if (test->settings->flowlabel < 1 || test->settings->flowlabel > 0xfffff) {
+		if (endptr == optarg ||
+		    test->settings->flowlabel < 1 || test->settings->flowlabel > 0xfffff) {
                     i_errno = IESETFLOW;
                     return -1;
 		}
@@ -876,8 +884,9 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
                 break;
             case 'A':
 #if defined(HAVE_CPU_AFFINITY)
-                test->affinity = atoi(optarg);
+                test->affinity = strtol(optarg, &endptr, 0);
-                if (test->affinity < 0 || test->affinity > 1024) {
+                if (endptr == optarg || 
+		    test->affinity < 0 || test->affinity > 1024) {
                     i_errno = IEAFFINITY;
                     return -1;
                 }

src/iperf_api.h

@@ -289,6 +289,7 @@ enum {
     IENOSCTP = 18,	    // No SCTP support available
     IEBIND = 19,			// Local port specified with no local bind option
     IEUDPBLOCKSIZE = 20,    // Block size too large. Maximum value = %dMAX_UDP_BLOCKSIZE
+    IEBADTOS = 21,	    // Bad TOS value
     /* Test errors */
     IENEWTEST = 100,        // Unable to create a new test (check perror)
     IEINITTEST = 101,       // Test initialization failed (check perror)

src/iperf_error.c

@@ -1,5 +1,5 @@
 /*
- * iperf, Copyright (c) 2014, The Regents of the University of
+ * iperf, Copyright (c) 2014, 2015, The Regents of the University of
  * California, through Lawrence Berkeley National Laboratory (subject
  * to receipt of any required approvals from the U.S. Dept. of
  * Energy).  All rights reserved.
@@ -127,6 +127,9 @@ iperf_strerror(int i_errno)
         case IEUDPBLOCKSIZE:
             snprintf(errstr, len, "block size too large (maximum = %d bytes)", MAX_UDP_BLOCKSIZE);
             break;
+	case IEBADTOS:
+	    snprintf(errstr, len, "bad TOS value (must be between 0 and 255 inclusive)");
+	    break;
         case IEMSS:
             snprintf(errstr, len, "TCP MSS too large (maximum = %d bytes)", MAX_MSS);
             break;

src/main.c

@@ -1,5 +1,5 @@
 /*
- * iperf, Copyright (c) 2014, The Regents of the University of
+ * iperf, Copyright (c) 2014, 2015, The Regents of the University of
  * California, through Lawrence Berkeley National Laboratory (subject
  * to receipt of any required approvals from the U.S. Dept. of
  * Energy).  All rights reserved.
@@ -153,10 +153,9 @@ run(struct iperf_test *test)
             for (;;) {
 		if (iperf_run_server(test) < 0) {
 		    iperf_err(test, "error - %s", iperf_strerror(i_errno));
-                    fprintf(stderr, "\n");
 		    ++consecutive_errors;
 		    if (consecutive_errors >= 5) {
-		        fprintf(stderr, "too many errors, exiting\n");
+		        iperf_errexit(test, "too many errors, exiting");
 			break;
 		    }
                 } else