cpukit: Remove telnetd

Update #3850

1 files changed, 0 insertions, 459 deletions

diff --git a/cpukit/telnetd/telnetd.c b/cpukit/telnetd/telnetd.c
deleted file mode 100644
index b8adec297a..0000000000
--- a/cpukit/telnetd/telnetd.c
+++ /dev/null
@@ -1,459 +0,0 @@
-/***********************************************************/
-/*
- *
- *  The telnet DAEMON
- *
- *  Author: 17,may 2001
- *
- *   WORK: fernando.ruiz@ctv.es
- *   HOME: correo@fernando-ruiz.com
- *
- * After start the net you can start this daemon.
- * It uses the previously inited pseudo-terminales (pty.c)
- * getting a new terminal with getpty(). This function
- * gives a terminal name passing a opened socket like parameter.
- *
- * With register_telnetd() you add a new command in the shell to start
- * this daemon interactively. (Login in /dev/console of course)
- *
- * Sorry but OOB is not still implemented. (This is the first version)
- *
- * Till Straumann <strauman@slac.stanford.edu>
- *  - made the 'shell' interface more generic, i.e. it is now
- *    possible to have 'telnetd' run an arbitrary 'shell'
- *    program.
- *
- * Copyright (c) 2009, 2018 embedded brains GmbH and others.
- *
- *   embedded brains GmbH
- *   Dornierstr. 4
- *   D-82178 Puchheim
- *   Germany
- *   <rtems@embedded-brains.de>
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <sys/queue.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <inttypes.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <syslog.h>
-
-#include <rtems.h>
-#include <rtems/pty.h>
-#include <rtems/shell.h>
-#include <rtems/telnetd.h>
-#include <rtems/thread.h>
-#include <rtems/userenv.h>
-
-#ifdef RTEMS_NETWORKING
-#include <rtems/rtems_bsdnet.h>
-#endif
-
-#define TELNETD_EVENT_SUCCESS RTEMS_EVENT_0
-
-#define TELNETD_EVENT_ERROR RTEMS_EVENT_1
-
-typedef struct telnetd_context telnetd_context;
-
-typedef struct telnetd_session {
-  rtems_pty_context            pty;
-  char                         peername[16];
-  telnetd_context             *ctx;
-  rtems_id                     task_id;
-  LIST_ENTRY(telnetd_session)  link;
-} telnetd_session;
-
-struct telnetd_context {
-  rtems_telnetd_config_table   config;
-  int                          server_socket;
-  rtems_id                     task_id;
-  rtems_mutex                  mtx;
-  LIST_HEAD(, telnetd_session) free_sessions;
-  telnetd_session              sessions[RTEMS_ZERO_LENGTH_ARRAY];
-};
-
-typedef union {
-  struct sockaddr_in sin;
-  struct sockaddr    sa;
-} telnetd_address;
-
-RTEMS_NO_RETURN static void telnetd_session_fatal_error(
-  const telnetd_context *ctx
-)
-{
-  (void)rtems_event_send(ctx->task_id, TELNETD_EVENT_ERROR);
-  rtems_task_exit();
-}
-
-static bool telnetd_login(telnetd_context *ctx, telnetd_session *session)
-{
-  bool success;
-
-  if (ctx->config.login_check == NULL) {
-    return true;
-  }
-
-  success = rtems_shell_login_prompt(
-    stdin,
-    stderr,
-    session->pty.name,
-    ctx->config.login_check
-  );
-
-  if (!success) {
-    syslog(
-      LOG_AUTHPRIV | LOG_WARNING,
-      "telnetd: too many wrong passwords entered from %s",
-      session->peername
-    );
-  }
-
-  return success;
-}
-
-static void telnetd_session_task(rtems_task_argument arg)
-{
-  rtems_status_code sc;
-  telnetd_session *session;
-  telnetd_context *ctx;
-  const char *path;
-
-  session = (telnetd_session *) arg;
-  ctx = session->ctx;
-
-  sc = rtems_libio_set_private_env();
-  if (sc != RTEMS_SUCCESSFUL) {
-    telnetd_session_fatal_error(ctx);
-  }
-
-  path = rtems_pty_get_path(&session->pty);
-
-  stdin = fopen(path, "r+");
-  if (stdin == NULL) {
-    telnetd_session_fatal_error(ctx);
-  }
-
-  stdout = fopen(path, "r+");
-  if (stdout == NULL) {
-    telnetd_session_fatal_error(ctx);
-  }
-
-  stderr = fopen(path, "r+");
-  if (stderr == NULL) {
-    telnetd_session_fatal_error(ctx);
-  }
-
-  (void)rtems_event_send(ctx->task_id, TELNETD_EVENT_SUCCESS);
-
-  while (true) {
-    rtems_event_set events;
-
-    (void)rtems_event_system_receive(
-      RTEMS_EVENT_SYSTEM_SERVER,
-      RTEMS_WAIT | RTEMS_EVENT_ALL,
-      RTEMS_NO_TIMEOUT,
-      &events
-    );
-
-    syslog(
-      LOG_DAEMON | LOG_INFO,
-      "telnetd: accepted connection from %s on %s",
-      session->peername,
-      path
-    );
-
-    if (telnetd_login(ctx, session)) {
-      (*ctx->config.command)(session->pty.name, ctx->config.arg);
-    }
-
-    syslog(
-      LOG_DAEMON | LOG_INFO,
-      "telnetd: releasing connection from %s on %s",
-      session->peername,
-      path
-    );
-
-    rtems_pty_close_socket(&session->pty);
-
-    rtems_mutex_lock(&ctx->mtx);
-    LIST_INSERT_HEAD(&ctx->free_sessions, session, link);
-    rtems_mutex_unlock(&ctx->mtx);
-  }
-}
-
-static void telnetd_sleep_after_error(void)
-{
-      /* If something went wrong, sleep for some time */
-      rtems_task_wake_after(10 * rtems_clock_get_ticks_per_second());
-}
-
-static void telnetd_server_task(rtems_task_argument arg)
-{
-  telnetd_context *ctx;
-
-  ctx = (telnetd_context *) arg;
-
-  while (true) {
-    telnetd_address peer;
-    socklen_t address_len;
-    int session_socket;
-    telnetd_session *session;
-
-    address_len = sizeof(peer.sin);
-    session_socket = accept(ctx->server_socket, &peer.sa, &address_len);
-    if (session_socket < 0) {
-      syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot accept session");
-      telnetd_sleep_after_error();
-      continue;
-    };
-
-    rtems_mutex_lock(&ctx->mtx);
-    session = LIST_FIRST(&ctx->free_sessions);
-
-    if (session == NULL) {
-      rtems_mutex_unlock(&ctx->mtx);
-
-      (void)close(session_socket);
-      syslog(LOG_DAEMON | LOG_ERR, "telnetd: no free session available");
-      telnetd_sleep_after_error();
-      continue;
-    }
-
-    LIST_REMOVE(session, link);
-    rtems_mutex_unlock(&ctx->mtx);
-
-    rtems_pty_set_socket(&session->pty, session_socket);
-
-    if (
-      inet_ntop(
-        AF_INET,
-        &peer.sin.sin_addr,
-        session->peername,
-        sizeof(session->peername)
-      ) == NULL
-    ) {
-      strlcpy(session->peername, "<UNKNOWN>", sizeof(session->peername));
-    }
-
-    (void)rtems_event_system_send(session->task_id, RTEMS_EVENT_SYSTEM_SERVER);
-  }
-}
-
-static void telnetd_destroy_context(telnetd_context *ctx)
-{
-  telnetd_session *session;
-
-  LIST_FOREACH(session, &ctx->free_sessions, link) {
-    if (session->task_id != 0) {
-      (void)rtems_task_delete(session->task_id);
-    }
-
-    (void)unlink(rtems_pty_get_path(&session->pty));
-  }
-
-  if (ctx->server_socket >= 0) {
-    (void)close(ctx->server_socket);
-  }
-
-  rtems_mutex_destroy(&ctx->mtx);
-  free(ctx);
-}
-
-static rtems_status_code telnetd_create_server_socket(telnetd_context *ctx)
-{
-  telnetd_address srv;
-  socklen_t address_len;
-  int enable;
-
-  ctx->server_socket = socket(PF_INET, SOCK_STREAM, 0);
-  if (ctx->server_socket < 0) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create server socket");
-    return RTEMS_UNSATISFIED;
-  }
-
-  enable = 1;
-  (void)setsockopt(
-    ctx->server_socket,
-    SOL_SOCKET,
-    SO_KEEPALIVE,
-    &enable,
-    sizeof(enable)
-  );
-
-  memset(&srv, 0, sizeof(srv));
-  srv.sin.sin_family = AF_INET;
-  srv.sin.sin_port = htons(ctx->config.port);
-  address_len = sizeof(srv.sin);
-
-  if (bind(ctx->server_socket, &srv.sa, address_len) != 0) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot bind server socket");
-    return RTEMS_RESOURCE_IN_USE;
-  };
-
-  if (listen(ctx->server_socket, ctx->config.client_maximum) != 0) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot listen on server socket");
-    return RTEMS_UNSATISFIED;
-  };
-
-  return RTEMS_SUCCESSFUL;
-}
-
-static rtems_status_code telnetd_create_session_tasks(telnetd_context *ctx)
-{
-  uint16_t i;
-
-  ctx->task_id = rtems_task_self();
-
-  for (i = 0; i < ctx->config.client_maximum; ++i) {
-    telnetd_session *session;
-    rtems_status_code sc;
-    const char *path;
-    rtems_event_set events;
-
-    session = &ctx->sessions[i];
-    session->ctx = ctx;
-    rtems_mutex_init(&ctx->mtx, "Telnet");
-    LIST_INSERT_HEAD(&ctx->free_sessions, session, link);
-
-    sc = rtems_task_create(
-      rtems_build_name('T', 'N', 'T', 'a' + i % 26),
-      ctx->config.priority,
-      ctx->config.stack_size,
-      RTEMS_DEFAULT_MODES,
-      RTEMS_FLOATING_POINT,
-      &session->task_id
-    );
-    if (sc != RTEMS_SUCCESSFUL) {
-      syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create session task");
-      return RTEMS_UNSATISFIED;
-    }
-
-    path = rtems_pty_initialize(&session->pty, i);
-    if (path == NULL) {
-      syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create session PTY");
-      return RTEMS_UNSATISFIED;
-    }
-
-    (void)rtems_task_start(
-      session->task_id,
-      telnetd_session_task,
-      (rtems_task_argument) session
-    );
-
-    (void)rtems_event_receive(
-      TELNETD_EVENT_SUCCESS | TELNETD_EVENT_ERROR,
-      RTEMS_WAIT | RTEMS_EVENT_ANY,
-      RTEMS_NO_TIMEOUT,
-      &events
-    );
-
-    if ((events & TELNETD_EVENT_ERROR) != 0) {
-      syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot initialize session task");
-      return RTEMS_UNSATISFIED;
-    }
-  }
-
-  return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_telnetd_start(const rtems_telnetd_config_table* config)
-{
-  telnetd_context *ctx;
-  rtems_status_code sc;
-  uint16_t client_maximum;
-
-  if (config->command == NULL) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: configuration with invalid command");
-    return RTEMS_INVALID_ADDRESS;
-  }
-
-  if (config->client_maximum == 0) {
-    client_maximum = 5;
-  } else {
-    client_maximum = config->client_maximum;
-  }
-
-  ctx = calloc(
-    1,
-    sizeof(*ctx) + client_maximum * sizeof(ctx->sessions[0])
-  );
-  if (ctx == NULL) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot allocate server context");
-    return RTEMS_UNSATISFIED;
-  }
-
-  ctx->config = *config;
-  ctx->config.client_maximum = client_maximum;
-  ctx->server_socket = -1;
-  LIST_INIT(&ctx->free_sessions);
-
-  /* Check priority */
-#ifdef RTEMS_NETWORKING
-  if (ctx->config.priority == 0) {
-    ctx->config.priority = rtems_bsdnet_config.network_task_priority;
-  }
-#endif
-  if (ctx->config.priority == 0) {
-    ctx->config.priority = 100;
-  }
-
-  /* Check stack size */
-  if (ctx->config.stack_size == 0) {
-    ctx->config.stack_size = (size_t)32 * 1024;
-  }
-
-  if (ctx->config.port == 0) {
-    ctx->config.port = 23;
-  }
-
-  sc = telnetd_create_server_socket(ctx);
-  if (sc != RTEMS_SUCCESSFUL) {
-    telnetd_destroy_context(ctx);
-    return sc;
-  }
-
-  sc = telnetd_create_session_tasks(ctx);
-  if (sc != RTEMS_SUCCESSFUL) {
-    telnetd_destroy_context(ctx);
-    return sc;
-  }
-
-  sc = rtems_task_create(
-    rtems_build_name('T', 'N', 'T', 'D'),
-    ctx->config.priority,
-    RTEMS_MINIMUM_STACK_SIZE,
-    RTEMS_DEFAULT_MODES,
-    RTEMS_FLOATING_POINT,
-    &ctx->task_id
-  );
-  if (sc != RTEMS_SUCCESSFUL) {
-    syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create server task");
-    telnetd_destroy_context(ctx);
-    return RTEMS_UNSATISFIED;
-  }
-
-  (void)rtems_task_start(
-    ctx->task_id,
-    telnetd_server_task,
-    (rtems_task_argument) ctx
-  );
-
-  syslog(
-    LOG_DAEMON | LOG_INFO,
-    "telnetd: started successfully on port %" PRIu16, ctx->config.port
-  );
-  return RTEMS_SUCCESSFUL;
-}