VCL: Refactor VCL test (part 1)

Change-Id: I6a326e24ed953b1cef63bd4010a3bedd6c4a7b1c
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

1 files changed, 629 insertions, 4 deletions

diff --git a/src/vcl/vcl_test_server.c b/src/vcl/vcl_test_server.c
index e91d2ecd7c8..5d37b46df93 100644
--- a/src/vcl/vcl_test_server.c
+++ b/src/vcl/vcl_test_server.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2018 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
@@ -13,10 +13,635 @@
  * limitations under the License.
  */
 
-#define VCL_TEST
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <ctype.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <vcl/vcl_test.h>
+#include <sys/epoll.h>
 
-#include <vcl/vppcom.h>
-#include <vcl/sock_test_server.c>
+typedef struct
+{
+  uint8_t is_alloc;
+  int fd;
+  uint8_t *buf;
+  uint32_t buf_size;
+  sock_test_cfg_t cfg;
+  sock_test_stats_t stats;
+  vppcom_endpt_t endpt;
+  uint8_t ip[16];
+} sock_server_conn_t;
+
+typedef struct
+{
+  uint32_t port;
+  uint32_t address_ip6;
+  uint32_t transport_udp;
+} sock_server_cfg_t;
+
+#define SOCK_SERVER_MAX_TEST_CONN  10
+#define SOCK_SERVER_MAX_EPOLL_EVENTS 10
+typedef struct
+{
+  int listen_fd;
+  sock_server_cfg_t cfg;
+  int epfd;
+  struct epoll_event listen_ev;
+  struct epoll_event wait_events[SOCK_SERVER_MAX_EPOLL_EVENTS];
+  size_t num_conn;
+  size_t conn_pool_size;
+  sock_server_conn_t *conn_pool;
+  int nfds;
+  fd_set rd_fdset;
+  fd_set wr_fdset;
+  struct timeval timeout;
+} sock_server_main_t;
+
+sock_server_main_t sock_server_main;
+
+static inline void
+conn_pool_expand (size_t expand_size)
+{
+  sock_server_main_t *ssm = &sock_server_main;
+  sock_server_conn_t *conn_pool;
+  size_t new_size = ssm->conn_pool_size + expand_size;
+  int i;
+
+  conn_pool = realloc (ssm->conn_pool, new_size * sizeof (*ssm->conn_pool));
+  if (conn_pool)
+    {
+      for (i = ssm->conn_pool_size; i < new_size; i++)
+	{
+	  sock_server_conn_t *conn = &conn_pool[i];
+	  memset (conn, 0, sizeof (*conn));
+	  sock_test_cfg_init (&conn->cfg);
+	  sock_test_buf_alloc (&conn->cfg, 1 /* is_rxbuf */ ,
+			       &conn->buf, &conn->buf_size);
+	  conn->cfg.txbuf_size = conn->cfg.rxbuf_size;
+	}
+
+      ssm->conn_pool = conn_pool;
+      ssm->conn_pool_size = new_size;
+    }
+  else
+    {
+      int errno_val = errno;
+      perror ("ERROR in conn_pool_expand()");
+      fprintf (stderr, "SERVER: ERROR: Memory allocation "
+	       "failed (errno = %d)!\n", errno_val);
+    }
+}
+
+static inline sock_server_conn_t *
+conn_pool_alloc (void)
+{
+  sock_server_main_t *ssm = &sock_server_main;
+  int i;
+
+  for (i = 0; i < ssm->conn_pool_size; i++)
+    {
+      if (!ssm->conn_pool[i].is_alloc)
+	{
+	  ssm->conn_pool[i].endpt.ip = ssm->conn_pool[i].ip;
+	  ssm->conn_pool[i].is_alloc = 1;
+	  return (&ssm->conn_pool[i]);
+	}
+    }
+
+  return 0;
+}
+
+static inline void
+conn_pool_free (sock_server_conn_t * conn)
+{
+  conn->fd = 0;
+  conn->is_alloc = 0;
+}
+
+static inline void
+sync_config_and_reply (sock_server_conn_t * conn, sock_test_cfg_t * rx_cfg)
+{
+  conn->cfg = *rx_cfg;
+  sock_test_buf_alloc (&conn->cfg, 1 /* is_rxbuf */ ,
+		       &conn->buf, &conn->buf_size);
+  conn->cfg.txbuf_size = conn->cfg.rxbuf_size;
+
+  if (conn->cfg.verbose)
+    {
+      printf ("\nSERVER (fd %d): Replying to cfg message!\n", conn->fd);
+      sock_test_cfg_dump (&conn->cfg, 0 /* is_client */ );
+    }
+  (void) vcl_test_write (conn->fd, (uint8_t *) & conn->cfg,
+			 sizeof (conn->cfg), NULL, conn->cfg.verbose);
+}
+
+static void
+stream_test_server_start_stop (sock_server_conn_t * conn,
+			       sock_test_cfg_t * rx_cfg)
+{
+  sock_server_main_t *ssm = &sock_server_main;
+  int client_fd = conn->fd;
+  sock_test_t test = rx_cfg->test;
+
+  if (rx_cfg->ctrl_handle == conn->fd)
+    {
+      int i;
+      clock_gettime (CLOCK_REALTIME, &conn->stats.stop);
+
+      for (i = 0; i < ssm->conn_pool_size; i++)
+	{
+	  sock_server_conn_t *tc = &ssm->conn_pool[i];
+
+	  if (tc->cfg.ctrl_handle == conn->fd)
+	    {
+	      sock_test_stats_accumulate (&conn->stats, &tc->stats);
+
+	      if (conn->cfg.verbose)
+		{
+		  static char buf[64];
+
+		  sprintf (buf, "SERVER (fd %d) RESULTS", tc->fd);
+		  sock_test_stats_dump (buf, &tc->stats, 1 /* show_rx */ ,
+					test == SOCK_TEST_TYPE_BI
+					/* show tx */ ,
+					conn->cfg.verbose);
+		}
+	    }
+	}
+
+      sock_test_stats_dump ("SERVER RESULTS", &conn->stats, 1 /* show_rx */ ,
+			    (test == SOCK_TEST_TYPE_BI) /* show_tx */ ,
+			    conn->cfg.verbose);
+      sock_test_cfg_dump (&conn->cfg, 0 /* is_client */ );
+      if (conn->cfg.verbose)
+	{
+	  printf ("  sock server main\n"
+		  SOCK_TEST_SEPARATOR_STRING
+		  "       buf:  %p\n"
+		  "  buf size:  %u (0x%08x)\n"
+		  SOCK_TEST_SEPARATOR_STRING,
+		  conn->buf, conn->buf_size, conn->buf_size);
+	}
+
+      sync_config_and_reply (conn, rx_cfg);
+      printf ("\nSERVER (fd %d): %s-directional Stream Test Complete!\n"
+	      SOCK_TEST_BANNER_STRING "\n", conn->fd,
+	      test == SOCK_TEST_TYPE_BI ? "Bi" : "Uni");
+    }
+  else
+    {
+      printf ("\n" SOCK_TEST_BANNER_STRING
+	      "SERVER (fd %d): %s-directional Stream Test!\n"
+	      "  Sending client the test cfg to start streaming data...\n",
+	      client_fd, test == SOCK_TEST_TYPE_BI ? "Bi" : "Uni");
+
+      rx_cfg->ctrl_handle = (rx_cfg->ctrl_handle == ~0) ? conn->fd :
+	rx_cfg->ctrl_handle;
+
+      sync_config_and_reply (conn, rx_cfg);
+
+      /* read the 1st chunk, record start time */
+      memset (&conn->stats, 0, sizeof (conn->stats));
+      clock_gettime (CLOCK_REALTIME, &conn->stats.start);
+    }
+}
+
+
+static inline void
+stream_test_server (sock_server_conn_t * conn, int rx_bytes)
+{
+  int client_fd = conn->fd;
+  sock_test_t test = conn->cfg.test;
+
+  if (test == SOCK_TEST_TYPE_BI)
+    (void) vcl_test_write (client_fd, conn->buf, rx_bytes, &conn->stats,
+			   conn->cfg.verbose);
+
+  if (conn->stats.rx_bytes >= conn->cfg.total_bytes)
+    {
+      clock_gettime (CLOCK_REALTIME, &conn->stats.stop);
+    }
+}
+
+static inline void
+new_client (void)
+{
+  sock_server_main_t *ssm = &sock_server_main;
+  int client_fd;
+  sock_server_conn_t *conn;
+
+  if (ssm->conn_pool_size < (ssm->num_conn + SOCK_SERVER_MAX_TEST_CONN + 1))
+    conn_pool_expand (SOCK_SERVER_MAX_TEST_CONN + 1);
+
+  conn = conn_pool_alloc ();
+  if (!conn)
+    {
+      fprintf (stderr, "\nSERVER: ERROR: No free connections!\n");
+      return;
+    }
+
+  client_fd = vppcom_session_accept (ssm->listen_fd, &conn->endpt, 0);
+  if (client_fd < 0)
+    {
+      int errno_val;
+      errno_val = errno = -client_fd;
+      perror ("ERROR in new_client()");
+      fprintf (stderr, "SERVER: ERROR: accept failed "
+	       "(errno = %d)!\n", errno_val);
+      return;
+    }
+
+  printf ("SERVER: Got a connection -- fd = %d (0x%08x)!\n",
+	  client_fd, client_fd);
+
+  conn->fd = client_fd;
+
+  {
+    struct epoll_event ev;
+    int rv;
+
+    ev.events = EPOLLIN;
+    ev.data.u64 = conn - ssm->conn_pool;
+    rv = vppcom_epoll_ctl (ssm->epfd, EPOLL_CTL_ADD, client_fd, &ev);
+    if (rv < 0)
+      {
+	int errno_val;
+	errno_val = errno = -rv;
+	perror ("ERROR in new_client()");
+	fprintf (stderr, "SERVER: ERROR: epoll_ctl failed (errno = %d)!\n",
+		 errno_val);
+      }
+    else
+      ssm->nfds++;
+  }
+}
+
+void
+print_usage_and_exit (void)
+{
+  fprintf (stderr,
+	   "sock_test_server [OPTIONS] <port>\n"
+	   "  OPTIONS\n"
+	   "  -h               Print this message and exit.\n"
+	   "  -6               Use IPv6\n"
+	   "  -u               Use UDP transport layer\n");
+  exit (1);
+}
+
+int
+main (int argc, char **argv)
+{
+  sock_server_main_t *ssm = &sock_server_main;
+  int client_fd, rv, main_rv = 0;
+  int tx_bytes, rx_bytes, nbytes;
+  sock_server_conn_t *conn;
+  sock_test_cfg_t *rx_cfg;
+  uint32_t xtra = 0;
+  uint64_t xtra_bytes = 0;
+  struct sockaddr_storage servaddr;
+  int errno_val;
+  int c, v, i;
+  uint16_t port = SOCK_TEST_SERVER_PORT;
+  vppcom_endpt_t endpt;
+
+  opterr = 0;
+  while ((c = getopt (argc, argv, "6D")) != -1)
+    switch (c)
+      {
+      case '6':
+	ssm->cfg.address_ip6 = 1;
+	break;
+
+      case 'D':
+	ssm->cfg.transport_udp = 1;
+	break;
+
+      case '?':
+	switch (optopt)
+	  {
+	  default:
+	    if (isprint (optopt))
+	      fprintf (stderr, "SERVER: ERROR: Unknown "
+		       "option `-%c'.\n", optopt);
+	    else
+	      fprintf (stderr, "SERVER: ERROR: Unknown "
+		       "option character `\\x%x'.\n", optopt);
+	  }
+	/* fall thru */
+      case 'h':
+      default:
+	print_usage_and_exit ();
+      }
+
+  if (argc < (optind + 1))
+    {
+      fprintf (stderr, "SERVER: ERROR: Insufficient number of arguments!\n");
+      print_usage_and_exit ();
+    }
+
+  if (sscanf (argv[optind], "%d", &v) == 1)
+    port = (uint16_t) v;
+  else
+    {
+      fprintf (stderr, "SERVER: ERROR: Invalid port (%s)!\n", argv[optind]);
+      print_usage_and_exit ();
+    }
+
+  conn_pool_expand (SOCK_SERVER_MAX_TEST_CONN + 1);
+
+  rv = vppcom_app_create ("vcl_test_server");
+  if (rv)
+    {
+      errno_val = errno = -rv;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: vppcom_app_create() failed "
+	       "(errno = %d)!\n", errno_val);
+      return -1;
+    }
+  else
+    {
+      ssm->listen_fd = vppcom_session_create (ssm->cfg.transport_udp ?
+					      VPPCOM_PROTO_UDP :
+					      VPPCOM_PROTO_TCP,
+					      0 /* is_nonblocking */ );
+    }
+  if (ssm->listen_fd < 0)
+    {
+      errno_val = errno = -ssm->listen_fd;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: vppcom_session_create() failed "
+	       "(errno = %d)!\n", errno_val);
+      return -1;
+    }
+
+  memset (&servaddr, 0, sizeof (servaddr));
+
+  if (ssm->cfg.address_ip6)
+    {
+      struct sockaddr_in6 *server_addr = (struct sockaddr_in6 *) &servaddr;
+      server_addr->sin6_family = AF_INET6;
+      server_addr->sin6_addr = in6addr_any;
+      server_addr->sin6_port = htons (port);
+    }
+  else
+    {
+      struct sockaddr_in *server_addr = (struct sockaddr_in *) &servaddr;
+      server_addr->sin_family = AF_INET;
+      server_addr->sin_addr.s_addr = htonl (INADDR_ANY);
+      server_addr->sin_port = htons (port);
+    }
+
+  if (ssm->cfg.address_ip6)
+    {
+      struct sockaddr_in6 *server_addr = (struct sockaddr_in6 *) &servaddr;
+      endpt.is_ip4 = 0;
+      endpt.ip = (uint8_t *) & server_addr->sin6_addr;
+      endpt.port = (uint16_t) server_addr->sin6_port;
+    }
+  else
+    {
+      struct sockaddr_in *server_addr = (struct sockaddr_in *) &servaddr;
+      endpt.is_ip4 = 1;
+      endpt.ip = (uint8_t *) & server_addr->sin_addr;
+      endpt.port = (uint16_t) server_addr->sin_port;
+    }
+
+  rv = vppcom_session_bind (ssm->listen_fd, &endpt);
+  if (rv < 0)
+    {
+      errno_val = errno = -rv;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: bind failed (errno = %d)!\n",
+	       errno_val);
+      return -1;
+    }
+
+  rv = vppcom_session_listen (ssm->listen_fd, 10);
+  if (rv < 0)
+    {
+      errno_val = errno = -rv;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: listen failed "
+	       "(errno = %d)!\n", errno_val);
+      return -1;
+    }
+
+  ssm->epfd = vppcom_epoll_create ();
+  if (ssm->epfd < 0)
+    {
+      errno_val = errno = -ssm->epfd;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: epoll_create failed (errno = %d)!\n",
+	       errno_val);
+      return -1;
+    }
+
+  ssm->listen_ev.events = EPOLLIN;
+  ssm->listen_ev.data.u32 = ~0;
+  rv = vppcom_epoll_ctl (ssm->epfd, EPOLL_CTL_ADD, ssm->listen_fd,
+			 &ssm->listen_ev);
+  if (rv < 0)
+    {
+      errno_val = errno = -rv;
+      perror ("ERROR in main()");
+      fprintf (stderr, "SERVER: ERROR: epoll_ctl failed "
+	       "(errno = %d)!\n", errno_val);
+      return -1;
+    }
+  printf ("\nSERVER: Waiting for a client to connect on port %d...\n", port);
+
+  while (1)
+    {
+      int num_ev;
+      num_ev = vppcom_epoll_wait (ssm->epfd, ssm->wait_events,
+				  SOCK_SERVER_MAX_EPOLL_EVENTS, 60.0);
+      if (num_ev < 0)
+	{
+	  errno = -num_ev;
+	  perror ("epoll_wait()");
+	  fprintf (stderr, "\nSERVER: ERROR: epoll_wait() "
+		   "failed -- aborting!\n");
+	  main_rv = -1;
+	  goto done;
+	}
+      else if (num_ev == 0)
+	{
+	  fprintf (stderr, "\nSERVER: epoll_wait() timeout!\n");
+	  continue;
+	}
+      for (i = 0; i < num_ev; i++)
+	{
+	  conn = &ssm->conn_pool[ssm->wait_events[i].data.u32];
+	  if (ssm->wait_events[i].events & (EPOLLHUP | EPOLLRDHUP))
+	    {
+	      vppcom_session_close (conn->fd);
+	      continue;
+	    }
+	  if (ssm->wait_events[i].data.u32 == ~0)
+	    {
+	      new_client ();
+	      continue;
+	    }
+	  client_fd = conn->fd;
+
+	  if (EPOLLIN & ssm->wait_events[i].events)
+	    {
+	      rx_bytes = vcl_test_read (client_fd, conn->buf,
+					conn->buf_size, &conn->stats);
+	      if (rx_bytes > 0)
+		{
+		  rx_cfg = (sock_test_cfg_t *) conn->buf;
+		  if (rx_cfg->magic == SOCK_TEST_CFG_CTRL_MAGIC)
+		    {
+		      if (rx_cfg->verbose)
+			{
+			  printf ("SERVER (fd %d): Received a cfg message!\n",
+				  client_fd);
+			  sock_test_cfg_dump (rx_cfg, 0 /* is_client */ );
+			}
+
+		      if (rx_bytes != sizeof (*rx_cfg))
+			{
+			  printf ("SERVER (fd %d): Invalid cfg message "
+				  "size (%d)!\n  Should be %lu bytes.\n",
+				  client_fd, rx_bytes, sizeof (*rx_cfg));
+			  conn->cfg.rxbuf_size = 0;
+			  conn->cfg.num_writes = 0;
+			  if (conn->cfg.verbose)
+			    {
+			      printf ("SERVER (fd %d): Replying to "
+				      "cfg message!\n", client_fd);
+			      sock_test_cfg_dump (rx_cfg, 0 /* is_client */ );
+			    }
+			  vcl_test_write (client_fd, (uint8_t *) & conn->cfg,
+					  sizeof (conn->cfg), NULL,
+					  conn->cfg.verbose);
+			  continue;
+			}
+
+		      switch (rx_cfg->test)
+			{
+			case SOCK_TEST_TYPE_NONE:
+			case SOCK_TEST_TYPE_ECHO:
+			  sync_config_and_reply (conn, rx_cfg);
+			  break;
+
+			case SOCK_TEST_TYPE_BI:
+			case SOCK_TEST_TYPE_UNI:
+			  stream_test_server_start_stop (conn, rx_cfg);
+			  break;
+
+			case SOCK_TEST_TYPE_EXIT:
+			  printf ("SERVER: Have a great day, "
+				  "connection %d!\n", client_fd);
+			  vppcom_session_close (client_fd);
+			  conn_pool_free (conn);
+			  printf ("SERVER: Closed client fd %d\n", client_fd);
+			  ssm->nfds--;
+			  if (!ssm->nfds)
+			    {
+			      printf ("SERVER: All client connections "
+				      "closed.\n\nSERVER: "
+				      "May the force be with you!\n\n");
+			      goto done;
+			    }
+			  break;
+
+			default:
+			  fprintf (stderr,
+				   "SERVER: ERROR: Unknown test type!\n");
+			  sock_test_cfg_dump (rx_cfg, 0 /* is_client */ );
+			  break;
+			}
+		      continue;
+		    }
+
+		  else if ((conn->cfg.test == SOCK_TEST_TYPE_UNI) ||
+			   (conn->cfg.test == SOCK_TEST_TYPE_BI))
+		    {
+		      stream_test_server (conn, rx_bytes);
+		      continue;
+		    }
+
+		  else if (isascii (conn->buf[0]))
+		    {
+		      /* If it looks vaguely like a string,
+		       * make sure it's terminated.
+		       */
+		      ((char *) conn->buf)[rx_bytes <
+					   conn->buf_size ? rx_bytes :
+					   conn->buf_size - 1] = 0;
+		      printf ("SERVER (fd %d): RX (%d bytes) - '%s'\n",
+			      conn->fd, rx_bytes, conn->buf);
+		    }
+		}
+	      else		// rx_bytes < 0
+		{
+		  if (errno == ECONNRESET)
+		    {
+		      printf ("\nSERVER: Connection reset by remote peer.\n"
+			      "  Y'all have a great day now!\n\n");
+		      break;
+		    }
+		  else
+		    continue;
+		}
+
+	      if (isascii (conn->buf[0]))
+		{
+		  /* If it looks vaguely like a string,
+		   * make sure it's terminated
+		   */
+		  ((char *) conn->buf)[rx_bytes <
+				       conn->buf_size ? rx_bytes :
+				       conn->buf_size - 1] = 0;
+		  if (xtra)
+		    fprintf (stderr, "SERVER: ERROR: "
+			     "FIFO not drained in previous test!\n"
+			     "       extra chunks %u (0x%x)\n"
+			     "        extra bytes %lu (0x%lx)\n",
+			     xtra, xtra, xtra_bytes, xtra_bytes);
+
+		  xtra = 0;
+		  xtra_bytes = 0;
+
+		  if (conn->cfg.verbose)
+		    printf ("SERVER (fd %d): Echoing back\n", client_fd);
+
+		  nbytes = strlen ((const char *) conn->buf) + 1;
+
+		  tx_bytes = vcl_test_write (client_fd, conn->buf,
+					     nbytes, &conn->stats,
+					     conn->cfg.verbose);
+		  if (tx_bytes >= 0)
+		    printf ("SERVER (fd %d): TX (%d bytes) - '%s'\n",
+			    conn->fd, tx_bytes, conn->buf);
+		}
+
+	      else		// Extraneous read data from non-echo tests???
+		{
+		  xtra++;
+		  xtra_bytes += rx_bytes;
+		}
+	    }
+	}
+    }
+
+done:
+  vppcom_session_close (ssm->listen_fd);
+  vppcom_app_destroy ();
+
+  if (ssm->conn_pool)
+    free (ssm->conn_pool);
+
+  return main_rv;
+}
 
 /*
  * fd.io coding-style-patch-verification: ON