Websocket test: clean up usage(), exit code

* Better usage() help page
* Do not submit another frame once we've sent all we needed

tests/websocket.c

@@ -125,6 +125,8 @@ process_message(struct worker_thread *wt, size_t sz) {
     /* decrement read count, and stop receiving when we reach zero. */
     wt->msg_received++;
     if(wt->msg_received == wt->msg_target) {
+        wt->debug("%s: thread %d has received all %d messages it expected\n",
+            __func__, wt->id, wt->msg_received);
         event_base_loopexit(wt->base, NULL);
     }
 }
@@ -193,7 +195,6 @@ websocket_can_read(int fd, short event, void *ptr) {
     evbuffer_debug_dump(wt, wt->rbuffer);
     if (ret == 0) {
         wt->debug("We didn't read anything from the socket...\n");
-        wait_for_possible_read(wt);
         return;
     }
 
@@ -236,10 +237,12 @@ websocket_can_read(int fd, short event, void *ptr) {
             evbuffer_drain(wt->rbuffer, (size_t)payload_len); /* remove payload itself */
             process_message(wt, payload_len);
 
-            if (evbuffer_get_length(wt->rbuffer) == 0) { /* consumed everything, let's write again */
-                wt->debug("our turn to write again\n");
-                wt->state = WS_RECEIVED_HANDSHAKE;
-                ws_enqueue_frame(wt);
+            if (evbuffer_get_length(wt->rbuffer) == 0) { /* consumed everything */
+                if (wt->msg_received < wt->msg_target) { /* let's write again */
+                    wt->debug("our turn to write again\n");
+                    wt->state = WS_RECEIVED_HANDSHAKE;
+                    ws_enqueue_frame(wt);
+                } /* otherwise, we're done */
                 return;
             } else {
                 wt->debug("there's still data to consume\n");
@@ -382,11 +385,11 @@ usage(const char* argv0, char *host_default, short port_default,
 
     printf("Usage: %s [options]\n"
         "Options are:\n"
-        "\t-h host\t\t(default = \"%s\")\n"
-        "\t-p port\t\t(default = %d)\n"
-        "\t-t threads\t(default = %d)\n"
-        "\t-n count\t(number of messages per thread, default = %d)\n"
-        "\t-v\t\t(verbose)\n",
+        "\t[--host|-h] HOST\t(default = \"%s\")\n"
+        "\t[--port|-p] PORT\t(default = %d)\n"
+        "\t[--clients|-c] THREADS\t(default = %d)\n"
+        "\t[--messages|-n] COUNT\t(number of messages per thread, default = %d)\n"
+        "\t[--verbose|-v]\t\t(extremely verbose output)\n",
         argv0, host_default, (int)port_default,
         thread_count_default, messages_default);
 }
@@ -417,12 +420,12 @@ main(int argc, char *argv[]) {
         {"help", no_argument, NULL, '?'},
         {"host", required_argument, NULL, 'h'},
         {"port", required_argument, NULL, 'p'},
-        {"threads", required_argument, NULL, 't'},
+        {"clients", required_argument, NULL, 'c'},
         {"messages", required_argument, NULL, 'n'},
         {"verbose", no_argument, NULL, 'v'},
         {0, 0, 0, 0}
     };
-    while ((opt = getopt_long(argc, argv, "h:p:t:n:vs", long_options, NULL)) != -1) {
+    while ((opt = getopt_long(argc, argv, "h:p:c:n:vs", long_options, NULL)) != -1) {
         switch (opt) {
             case 'h':
                 colon = strchr(optarg, ':');
@@ -441,7 +444,7 @@ main(int argc, char *argv[]) {
                 hi.port = (short)atol(optarg);
                 break;
 
-            case 't':
+            case 'c':
                 thread_count = atoi(optarg);
                 break;
 
@@ -457,7 +460,7 @@ main(int argc, char *argv[]) {
                 usage(argv[0], host_default, port_default,
                         thread_count_default,
                         messages_default);
-                exit(EXIT_FAILURE);
+                exit(EXIT_SUCCESS);
         }
     }
 
@@ -509,7 +512,7 @@ main(int argc, char *argv[]) {
             (mili1-mili0)/1000.0,
             1000*((double)total)/(mili1-mili0),
             kb_per_sec);
-        return EXIT_SUCCESS;
+        return (total == thread_count * msg_target ? EXIT_SUCCESS : EXIT_FAILURE);
     } else {
         printf("No message was read.\n");
         return EXIT_FAILURE;