Add debug messges when State changes

src/iperf_api.c

@@ -481,6 +481,10 @@ iperf_set_test_stats_interval(struct iperf_test *ipt, double stats_interval)
 void
 iperf_set_test_state(struct iperf_test *ipt, signed char state)
 {
+    if (ipt->debug_level >= DEBUG_LEVEL_INFO) {
+        iperf_printf(ipt, "State change: State set to %d-%s (from %d-%s)\n",
+                     state, state_to_text(state), ipt->state, state_to_text(ipt->state));
+    }
     ipt->state = state;
 }
 
@@ -1862,7 +1866,7 @@ int
 iperf_set_send_state(struct iperf_test *test, signed char state)
 {
     if (test->ctrl_sck >= 0) {
-        test->state = state;
+        iperf_set_test_state(test, state);
         if (Nwrite(test->ctrl_sck, (char*) &state, sizeof(state), Ptcp) < 0) {
 	    i_errno = IESENDMESSAGE;
 	    return -1;
@@ -4746,14 +4750,14 @@ iperf_got_sigend(struct iperf_test *test)
 	test->done = 1;
 	cpu_util(test->cpu_util);
 	test->stats_callback(test);
-	test->state = DISPLAY_RESULTS; /* change local state only */
+	iperf_set_test_state(test, DISPLAY_RESULTS); /* change local state only */
 	if (test->on_test_finish)
 	    test->on_test_finish(test);
 	test->reporter_callback(test);
     }
 
     if (test->ctrl_sck >= 0) {
-	test->state = (test->role == 'c') ? CLIENT_TERMINATE : SERVER_TERMINATE;
+	iperf_set_test_state(test, (test->role == 'c') ? CLIENT_TERMINATE : SERVER_TERMINATE);
 	(void) Nwrite(test->ctrl_sck, (char*) &test->state, sizeof(signed char), Ptcp);
     }
     i_errno = (test->role == 'c') ? IECLIENTTERM : IESERVERTERM;

src/iperf_client_api.c

@@ -288,6 +288,11 @@ iperf_handle_message_client(struct iperf_test *test)
 	i_errno = IEINITTEST;
         return -1;
     }
+
+    if (test->debug_level >= DEBUG_LEVEL_INFO) {
+        iperf_printf(test, "Reading new State from the Server - current state is %d-%s\n", test->state, state_to_text(test->state));
+    }
+
     /*!!! Why is this read() and not Nread()? */
     if ((rval = read(test->ctrl_sck, (char*) &test->state, sizeof(signed char))) <= 0) {
         if (rval == 0) {
@@ -299,6 +304,10 @@ iperf_handle_message_client(struct iperf_test *test)
         }
     }
 
+    if (test->debug_level >= DEBUG_LEVEL_INFO) {
+        iperf_printf(test, "State change: client received and changed State to %d-%s\n", test->state, state_to_text(test->state));
+    }
+
     switch (test->state) {
         case PARAM_EXCHANGE:
             if (iperf_exchange_parameters(test) < 0)

src/iperf_server_api.c

@@ -218,19 +218,27 @@ iperf_handle_message_server(struct iperf_test *test)
     int rval;
     struct iperf_stream *sp;
 
+    if (test->debug_level >= DEBUG_LEVEL_INFO) {
+        iperf_printf(test, "Reading new State from the Client - current state is %d-%s\n", test->state, state_to_text(test->state));
+    }
+
     // XXX: Need to rethink how this behaves to fit API
     if ((rval = Nread(test->ctrl_sck, (char*) &test->state, sizeof(signed char), Ptcp)) <= 0) {
         if (rval == 0) {
             iperf_err(test, "the client has unexpectedly closed the connection");
             i_errno = IECTRLCLOSE;
-            test->state = IPERF_DONE;
+            iperf_set_test_state(test, IPERF_DONE);
             return 0;
         } else {
             i_errno = IERECVMESSAGE;
             return -1;
         }
     }
 
+    if (test->debug_level >= DEBUG_LEVEL_INFO) {
+        iperf_printf(test, "State change: server received and changed State to %d-%s\n", test->state, state_to_text(test->state));
+    }
+
     switch(test->state) {
         case TEST_START:
             break;
@@ -273,7 +281,7 @@ iperf_handle_message_server(struct iperf_test *test)
                 FD_CLR(sp->socket, &test->write_set);
                 close(sp->socket);
             }
-            test->state = IPERF_DONE;
+            iperf_set_test_state(test, IPERF_DONE);
             break;
         default:
             i_errno = IEMESSAGE;
@@ -552,7 +560,7 @@ iperf_run_server(struct iperf_test *test)
     iperf_time_now(&last_receive_time); // Initialize last time something was received
     last_receive_blocks = 0;
 
-    test->state = IPERF_START;
+    iperf_set_test_state(test, IPERF_START);
     send_streams_accepted = 0;
     rec_streams_accepted = 0;
     rcv_timeout_us = (test->settings->rcv_timeout.secs * SEC_TO_US) + test->settings->rcv_timeout.usecs;

src/iperf_tcp.c

@@ -41,6 +41,7 @@
 #include "iperf.h"
 #include "iperf_api.h"
 #include "iperf_tcp.h"
+#include "iperf_util.h"
 #include "net.h"
 #include "cjson.h"
 
@@ -69,7 +70,7 @@ iperf_tcp_recv(struct iperf_stream *sp)
     }
     else {
 	if (sp->test->debug)
-	    printf("Late receive, state = %d\n", sp->test->state);
+	    printf("Late receive, state = %d-%s\n", sp->test->state, state_to_text(sp->test->state));
     }
 
     return r;

src/iperf_util.c

@@ -595,3 +595,30 @@ getline(char **buf, size_t *bufsiz, FILE *fp)
 }
 
 #endif
+
+/* Translate numeric State to text - for debugging pupposes */
+char *
+state_to_text(signed char state)
+{
+    char *txt;
+
+    switch (state) {
+        case 0: txt = "Test reset"; break;
+        case TEST_START: txt = "TEST_START - starting a new test"; break;
+        case TEST_RUNNING: txt = "TEST_RUNNING"; break;
+        case TEST_END: txt = "TEST_END"; break;
+        case PARAM_EXCHANGE: txt = "PARAM_EXCHANGE - Client to Server Parameters Exchange"; break;
+        case CREATE_STREAMS: txt = "CREATE_STREAMS"; break;
+        case SERVER_TERMINATE: txt = "SERVER_TERMINATE"; break;
+        case CLIENT_TERMINATE: txt = "CLIENT_TERMINATE"; break;
+        case EXCHANGE_RESULTS: txt = "EXCHANGE_RESULTS"; break;
+        case DISPLAY_RESULTS: txt = "DISPLAY_RESULTS"; break;
+        case IPERF_START: txt = "IPERF_START - waiting for a new test"; break;
+        case IPERF_DONE: txt = "IPERF_DONE"; break;
+        case ACCESS_DENIED: txt = "ACCESS_DENIED - Server is busy"; break;
+        case SERVER_ERROR: txt = "SERVER_ERROR"; break;
+        default: txt = "Unknown State";
+    }
+
+    return txt;
+}

src/iperf_util.h

@@ -64,4 +64,6 @@ extern int daemon(int nochdir, int noclose);
 ssize_t getline(char **buf, size_t *bufsiz, FILE *fp);
 #endif /* HAVE_GETLINE */
 
+char * state_to_text(signed char state);
+
 #endif