2 This file is part of GNUnet
3 (C) 2008--2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file testbed/testbed_api_hosts.c
23 * @brief API for manipulating 'hosts' controlled by the GNUnet testing service;
24 * allows parsing hosts files, starting, stopping and communicating (via
25 * SSH/stdin/stdout) with the remote (or local) processes
26 * @author Christian Grothoff
29 #include "gnunet_testbed_service.h"
30 #include "gnunet_core_service.h"
31 #include "gnunet_constants.h"
32 #include "gnunet_transport_service.h"
33 #include "gnunet_hello_lib.h"
34 #include "gnunet_container_lib.h"
39 * Opaque handle to a host running experiments managed by the testing framework.
40 * The master process must be able to SSH to this host without password (via
43 struct GNUNET_TESTBED_Host
47 * The next pointer for DLL
49 struct GNUNET_TESTBED_Host *next;
52 * The prev pointer for DLL
54 struct GNUNET_TESTBED_Host *prev;
57 * The hostname of the host; NULL for localhost
62 * The username to be used for SSH login
67 * Global ID we use to refer to a host on the network
72 * The port which is to be used for SSH
79 * Head element in the list of available hosts
81 static struct GNUNET_TESTBED_Host *host_list_head;
84 * Tail element in the list of available hosts
86 static struct GNUNET_TESTBED_Host *host_list_tail;
90 * Lookup a host by ID.
92 * @param id global host ID assigned to the host; 0 is
93 * reserved to always mean 'localhost'
94 * @return handle to the host, NULL if host not found
96 struct GNUNET_TESTBED_Host *
97 GNUNET_TESTBED_host_lookup_by_id_ (uint32_t id)
99 struct GNUNET_TESTBED_Host *host;
101 for (host = host_list_head; NULL != host; host=host->next)
102 if (id == host->unique_id)
109 * Create a host by ID; given this host handle, we could not
110 * run peers at the host, but we can talk about the host
113 * @param id global host ID assigned to the host; 0 is
114 * reserved to always mean 'localhost'
115 * @return handle to the host, NULL on error
117 struct GNUNET_TESTBED_Host *
118 GNUNET_TESTBED_host_create_by_id_ (uint32_t id)
126 * Obtain a host's unique global ID.
128 * @param host handle to the host, NULL means 'localhost'
129 * @return id global host ID assigned to the host (0 is
130 * 'localhost', but then obviously not globally unique)
133 GNUNET_TESTBED_host_get_id_ (struct GNUNET_TESTBED_Host *host)
135 return host->unique_id;
140 * Create a host to run peers and controllers on.
142 * @param id global host ID assigned to the host; 0 is
143 * reserved to always mean 'localhost'
144 * @param hostname name of the host, use "NULL" for localhost
145 * @param username username to use for the login; may be NULL
146 * @param port port number to use for ssh; use 0 to let ssh decide
147 * @return handle to the host, NULL on error
149 static struct GNUNET_TESTBED_Host *
150 GNUNET_TESTBED_host_create_with_id_ (uint32_t id,
151 const char *hostname,
152 const char *username,
155 struct GNUNET_TESTBED_Host *host;
157 host = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Host));
158 host->hostname = hostname;
159 host->username = username;
160 host->unique_id = id;
161 host->port = (0 == port) ? 22 : port;
162 GNUNET_CONTAINER_DLL_insert_tail (host_list_head, host_list_tail, host);
168 * Create a host to run peers and controllers on.
170 * @param hostname name of the host, use "NULL" for localhost
171 * @param username username to use for the login; may be NULL
172 * @param port port number to use for ssh; use 0 to let ssh decide
173 * @return handle to the host, NULL on error
175 struct GNUNET_TESTBED_Host *
176 GNUNET_TESTBED_host_create (const char *hostname,
177 const char *username,
180 static uint32_t uid_generator;
182 if (NULL == hostname)
183 return GNUNET_TESTBED_host_create_with_id_ (0, hostname, username, port);
184 return GNUNET_TESTBED_host_create_with_id_ (++uid_generator,
191 * Load a set of hosts from a configuration file.
193 * @param filename file with the host specification
194 * @param hosts set to the hosts found in the file
195 * @return number of hosts returned in 'hosts', 0 on error
198 GNUNET_TESTBED_hosts_load_from_file (const char *filename,
199 struct GNUNET_TESTBED_Host **hosts)
207 * Destroy a host handle. Must only be called once everything
208 * running on that host has been stopped.
210 * @param host handle to destroy
213 GNUNET_TESTBED_host_destroy (struct GNUNET_TESTBED_Host *host)
215 GNUNET_CONTAINER_DLL_remove (host_list_head, host_list_tail, host);
221 * Run a given helper process at the given host. Communication
222 * with the helper will be via GNUnet messages on stdin/stdout.
223 * Runs the process via 'ssh' at the specified host, or locally.
224 * Essentially an SSH-wrapper around the 'gnunet_helper_lib.h' API.
226 * @param host host to use, use "NULL" for localhost
227 * @param binary_argv binary name and command-line arguments to give to the binary
228 * @param cb function to call for messages received from the binary
229 * @param cb_cls closure for cb
230 * @return handle to terminate the command, NULL on error
232 struct GNUNET_HELPER_Handle *
233 GNUNET_TESTBED_host_run_ (struct GNUNET_TESTBED_Host *host,
234 char *const binary_argv[],
235 GNUNET_SERVER_MessageTokenizerCallback cb, void *cb_cls)
237 /* FIXME: decide on the SSH command line, prepend it and
238 run GNUNET_HELPER_start with the modified binary_name and binary_argv! */
244 /* end of testbed_api_hosts.c */