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- /*
- This file is part of GNUnet
- Copyright (C) 2008--2013 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file testbed/testbed_api_hosts.c
- * @brief API for manipulating 'hosts' controlled by the GNUnet testing service;
- * allows parsing hosts files, starting, stopping and communicating (via
- * SSH/stdin/stdout) with the remote (or local) processes
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "gnunet_testbed_service.h"
- #include "gnunet_core_service.h"
- #include "gnunet_transport_service.h"
- #include "testbed_api.h"
- #include "testbed_api_hosts.h"
- #include "testbed_helper.h"
- #include "testbed_api_operations.h"
- #include <zlib.h>
- #include <regex.h>
- /**
- * Generic logging shorthand
- */
- #define LOG(kind, ...) \
- GNUNET_log_from (kind, "testbed-api-hosts", __VA_ARGS__);
- /**
- * Debug logging shorthand
- */
- #define LOG_DEBUG(...) \
- LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__);
- /**
- * Prints API violation message
- */
- #define API_VIOLATION(cond,errstr) \
- do { \
- if (cond) \
- break; \
- LOG (GNUNET_ERROR_TYPE_ERROR, "API violation detected: %s\n", errstr); \
- GNUNET_assert (0); \
- } while (0)
- /**
- * Log an error message at log-level 'level' that indicates a failure of the
- * command 'cmd' with the message given by gai_strerror(rc).
- */
- #define LOG_GAI(level, cmd, rc) do { LOG(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, gai_strerror(rc)); } while(0)
- /**
- * Number of extra elements we create space for when we grow host list
- */
- #define HOST_LIST_GROW_STEP 10
- /**
- * A list entry for registered controllers list
- */
- struct RegisteredController
- {
- /**
- * The controller at which this host is registered
- */
- const struct GNUNET_TESTBED_Controller *controller;
- /**
- * The next ptr for DLL
- */
- struct RegisteredController *next;
- /**
- * The prev ptr for DLL
- */
- struct RegisteredController *prev;
- };
- /**
- * Opaque handle to a host running experiments managed by the testing framework.
- * The master process must be able to SSH to this host without password (via
- * ssh-agent).
- */
- struct GNUNET_TESTBED_Host
- {
- /**
- * The hostname of the host; NULL for localhost
- */
- const char *hostname;
- /**
- * The username to be used for SSH login
- */
- const char *username;
- /**
- * the configuration to use as a template while starting a controller on this
- * host. Operation queue size specific to a host are also read from this
- * configuration handle. After starting the controller, it points to the actual
- * configuration with which the controller is running
- */
- struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * The head for the list of controllers where this host is registered
- */
- struct RegisteredController *rc_head;
- /**
- * The tail for the list of controllers where this host is registered
- */
- struct RegisteredController *rc_tail;
- /**
- * Operation queue for simultaneous overlay connect operations target at this
- * host
- */
- struct OperationQueue *opq_parallel_overlay_connect_operations;
- /**
- * Is a controller started on this host? FIXME: Is this needed?
- */
- int controller_started;
- /**
- * Is this host locked by GNUNET_TESTBED_controller_start()?
- */
- int locked;
- /**
- * Global ID we use to refer to a host on the network
- */
- uint32_t id;
- /**
- * The port which is to be used for SSH
- */
- uint16_t port;
- };
- /**
- * Array of available hosts
- */
- static struct GNUNET_TESTBED_Host **host_list;
- /**
- * The size of the available hosts list
- */
- static unsigned int host_list_size;
- /**
- * Lookup a host by ID.
- *
- * @param id global host ID assigned to the host; 0 is
- * reserved to always mean 'localhost'
- * @return handle to the host, NULL if host not found
- */
- struct GNUNET_TESTBED_Host *
- GNUNET_TESTBED_host_lookup_by_id_ (uint32_t id)
- {
- if (host_list_size <= id)
- return NULL;
- return host_list[id];
- }
- /**
- * Create a host by ID; given this host handle, we could not
- * run peers at the host, but we can talk about the host
- * internally.
- *
- * @param id global host ID assigned to the host; 0 is
- * reserved to always mean 'localhost'
- * @param cfg the configuration to use as a template while starting a controller
- * on this host. Operation queue sizes specific to a host are also
- * read from this configuration handle
- * @return handle to the host, NULL on error
- */
- struct GNUNET_TESTBED_Host *
- GNUNET_TESTBED_host_create_by_id_ (uint32_t id,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- return GNUNET_TESTBED_host_create_with_id (id, NULL, NULL, cfg, 0);
- }
- /**
- * Obtain the host's unique global ID.
- *
- * @param host handle to the host, NULL means 'localhost'
- * @return id global host ID assigned to the host (0 is
- * 'localhost', but then obviously not globally unique)
- */
- uint32_t
- GNUNET_TESTBED_host_get_id_ (const struct GNUNET_TESTBED_Host * host)
- {
- return host->id;
- }
- /**
- * Obtain the host's hostname.
- *
- * @param host handle to the host, NULL means 'localhost'
- * @return hostname of the host
- */
- const char *
- GNUNET_TESTBED_host_get_hostname (const struct GNUNET_TESTBED_Host *host)
- {
- return host->hostname;
- }
- /**
- * Obtain the host's username
- *
- * @param host handle to the host, NULL means 'localhost'
- * @return username to login to the host
- */
- const char *
- GNUNET_TESTBED_host_get_username_ (const struct GNUNET_TESTBED_Host *host)
- {
- return host->username;
- }
- /**
- * Obtain the host's ssh port
- *
- * @param host handle to the host, NULL means 'localhost'
- * @return username to login to the host
- */
- uint16_t
- GNUNET_TESTBED_host_get_ssh_port_ (const struct GNUNET_TESTBED_Host * host)
- {
- return host->port;
- }
- /**
- * Check whether a controller is already started on the given host
- *
- * @param host the handle to the host
- * @return GNUNET_YES if the controller is already started; GNUNET_NO if not
- */
- int
- GNUNET_TESTBED_host_controller_started (const struct GNUNET_TESTBED_Host *host)
- {
- return host->controller_started;
- }
- /**
- * Obtain the host's configuration template
- *
- * @param host handle to the host
- * @return the host's configuration template
- */
- const struct GNUNET_CONFIGURATION_Handle *
- GNUNET_TESTBED_host_get_cfg_ (const struct GNUNET_TESTBED_Host *host)
- {
- return host->cfg;
- }
- /**
- * Function to replace host's configuration
- *
- * @param host the host handle
- * @param new_cfg the new configuration to replace the old one
- */
- void
- GNUNET_TESTBED_host_replace_cfg_ (struct GNUNET_TESTBED_Host *host,
- const struct GNUNET_CONFIGURATION_Handle *new_cfg)
- {
- GNUNET_CONFIGURATION_destroy (host->cfg);
- host->cfg = GNUNET_CONFIGURATION_dup (new_cfg);
- }
- /**
- * Create a host to run peers and controllers on.
- *
- * @param id global host ID assigned to the host; 0 is
- * reserved to always mean 'localhost'
- * @param hostname name of the host, use "NULL" for localhost
- * @param username username to use for the login; may be NULL
- * @param cfg the configuration to use as a template while starting a controller
- * on this host. Operation queue sizes specific to a host are also
- * read from this configuration handle
- * @param port port number to use for ssh; use 0 to let ssh decide
- * @return handle to the host, NULL on error
- */
- struct GNUNET_TESTBED_Host *
- GNUNET_TESTBED_host_create_with_id (uint32_t id, const char *hostname,
- const char *username,
- const struct GNUNET_CONFIGURATION_Handle
- *cfg,
- uint16_t port)
- {
- struct GNUNET_TESTBED_Host *host;
- unsigned int new_size;
- if ((id < host_list_size) && (NULL != host_list[id]))
- {
- LOG (GNUNET_ERROR_TYPE_WARNING, "Host with id: %u already created\n", id);
- return NULL;
- }
- host = GNUNET_new (struct GNUNET_TESTBED_Host);
- host->hostname = (NULL != hostname) ? GNUNET_strdup (hostname) : NULL;
- host->username = (NULL != username) ? GNUNET_strdup (username) : NULL;
- host->id = id;
- host->port = (0 == port) ? 22 : port;
- host->cfg = GNUNET_CONFIGURATION_dup (cfg);
- host->opq_parallel_overlay_connect_operations =
- GNUNET_TESTBED_operation_queue_create_ (OPERATION_QUEUE_TYPE_ADAPTIVE,
- UINT_MAX);
- new_size = host_list_size;
- while (id >= new_size)
- new_size += HOST_LIST_GROW_STEP;
- if (new_size != host_list_size)
- GNUNET_array_grow (host_list, host_list_size, new_size);
- GNUNET_assert (id < host_list_size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding host with id: %u\n", host->id);
- host_list[id] = host;
- return host;
- }
- /**
- * Create a host to run peers and controllers on.
- *
- * @param hostname name of the host, use "NULL" for localhost
- * @param username username to use for the login; may be NULL
- * @param cfg the configuration to use as a template while starting a controller
- * on this host. Operation queue sizes specific to a host are also
- * read from this configuration handle
- * @param port port number to use for ssh; use 0 to let ssh decide
- * @return handle to the host, NULL on error
- */
- struct GNUNET_TESTBED_Host *
- GNUNET_TESTBED_host_create (const char *hostname, const char *username,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- uint16_t port)
- {
- static uint32_t uid_generator;
- if (NULL == hostname)
- return GNUNET_TESTBED_host_create_with_id (0, hostname, username,
- cfg, port);
- return GNUNET_TESTBED_host_create_with_id (++uid_generator, hostname,
- username, cfg, port);
- }
- /**
- * Load a set of hosts from a configuration file.
- *
- * @param filename file with the host specification
- * @param cfg the configuration to use as a template while starting a controller
- * on any of the loaded hosts. Operation queue sizes specific to a host
- * are also read from this configuration handle
- * @param hosts set to the hosts found in the file; caller must free this if
- * number of hosts returned is greater than 0
- * @return number of hosts returned in 'hosts', 0 on error
- */
- unsigned int
- GNUNET_TESTBED_hosts_load_from_file (const char *filename,
- const struct GNUNET_CONFIGURATION_Handle
- *cfg,
- struct GNUNET_TESTBED_Host ***hosts)
- {
- struct GNUNET_TESTBED_Host *starting_host;
- char *data;
- char *buf;
- char *username;
- char *hostname;
- regex_t rex;
- regmatch_t pmatch[6];
- uint64_t fs;
- short int port;
- unsigned int offset;
- unsigned int count;
- GNUNET_assert (NULL != filename);
- if (GNUNET_YES != GNUNET_DISK_file_test (filename))
- {
- LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s not found\n"), filename);
- return 0;
- }
- if (GNUNET_OK !=
- GNUNET_DISK_file_size (filename, &fs, GNUNET_YES, GNUNET_YES))
- fs = 0;
- if (0 == fs)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s has no data\n"), filename);
- return 0;
- }
- data = GNUNET_malloc (fs);
- if (fs != GNUNET_DISK_fn_read (filename, data, fs))
- {
- GNUNET_free (data);
- LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s cannot be read\n"),
- filename);
- return 0;
- }
- buf = data;
- offset = 0;
- starting_host = NULL;
- count = 0;
- /* refer RFC 952 and RFC 1123 for valid hostnames */
- GNUNET_assert (0 == regcomp (&rex,
- "^(([[:alnum:]]+)@)?" /* username */
- "([[:alnum:]]+[-[:alnum:]_\\.]+)" /* hostname */
- "(:([[:digit:]]{1,5}))?", /* port */
- REG_EXTENDED | REG_ICASE));
- while (offset < (fs - 1))
- {
- offset++;
- if (((data[offset] == '\n')) && (buf != &data[offset]))
- {
- unsigned int size;
- data[offset] = '\0';
- username = NULL;
- hostname = NULL;
- port = 0;
- if ((REG_NOMATCH == regexec (&rex, buf, 6, pmatch, 0))
- || (-1 == pmatch[3].rm_so))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Error reading line `%s' in hostfile\n", buf);
- buf = &data[offset + 1];
- continue;
- }
- if (-1 != pmatch[2].rm_so)
- {
- size = pmatch[2].rm_eo - pmatch[2].rm_so;
- username = GNUNET_malloc (size + 1);
- username[size] = '\0';
- GNUNET_assert (NULL != strncpy (username, buf + pmatch[2].rm_so, size));
- }
- if (-1 != pmatch[5].rm_so)
- {
- (void) SSCANF (buf + pmatch[5].rm_so, "%5hd", &port);
- }
- size = pmatch[3].rm_eo - pmatch[3].rm_so;
- hostname = GNUNET_malloc (size + 1);
- hostname[size] = '\0';
- GNUNET_assert (NULL != strncpy (hostname, buf + pmatch[3].rm_so, size));
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Successfully read host %s, port %d and user %s from file\n",
- (NULL == hostname) ? "NULL" : hostname,
- port,
- (NULL == username) ? "NULL" : username);
- /* We store hosts in a static list; hence we only require the starting
- * host pointer in that list to access the newly created list of hosts */
- if (NULL == starting_host)
- starting_host = GNUNET_TESTBED_host_create (hostname, username, cfg,
- port);
- else
- (void) GNUNET_TESTBED_host_create (hostname, username, cfg, port);
- count++;
- GNUNET_free_non_null (username);
- GNUNET_free (hostname);
- buf = &data[offset + 1];
- }
- else if ((data[offset] == '\n') || (data[offset] == '\0'))
- buf = &data[offset + 1];
- }
- regfree (&rex);
- GNUNET_free (data);
- if (NULL == starting_host)
- return 0;
- *hosts = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Host *) * count);
- GNUNET_memcpy (*hosts,
- &host_list[GNUNET_TESTBED_host_get_id_ (starting_host)],
- sizeof (struct GNUNET_TESTBED_Host *) * count);
- return count;
- }
- /**
- * Resolves a hostname using getaddrinfo
- *
- * @param host the hostname
- * @return the string representing the IPv4 address of the given host; NULL upon error
- */
- const char *
- simple_resolve (const char *host)
- {
- struct addrinfo *res;
- const struct sockaddr_in *in_addr;
- char *hostip;
- struct addrinfo hint;
- unsigned int rc;
- hint.ai_family = AF_INET; /* IPv4 */
- hint.ai_socktype = 0;
- hint.ai_protocol = 0;
- hint.ai_addrlen = 0;
- hint.ai_addr = NULL;
- hint.ai_canonname = NULL;
- hint.ai_next = NULL;
- hint.ai_flags = AI_NUMERICSERV;
- res = NULL;
- LOG_DEBUG ("Resolving [%s]\n", host);
- if (0 != (rc = getaddrinfo (host, "22", &hint, &res)))
- {
- LOG_GAI (GNUNET_ERROR_TYPE_ERROR, "getaddrinfo", rc);
- return NULL;
- }
- GNUNET_assert (NULL != res);
- GNUNET_assert (NULL != res->ai_addr);
- GNUNET_assert (sizeof (struct sockaddr_in) == res->ai_addrlen);
- in_addr = (const struct sockaddr_in *) res->ai_addr;
- hostip = inet_ntoa (in_addr->sin_addr);
- GNUNET_assert (NULL != hostip);
- freeaddrinfo (res);
- LOG_DEBUG ("Resolved [%s] to [%s]\n", host, hostip);
- return hostip;
- }
- /**
- * Loads the set of host allocated by the LoadLeveler Job Scheduler. This
- * function is only available when compiled with support for LoadLeveler and is
- * used for running on the SuperMUC
- *
- * @param cfg the configuration to use as a template while starting a controller
- * on any of the loaded hosts. Operation queue sizes specific to a host
- * are also read from this configuration handle
- * @param hosts set to the hosts found in the file; caller must free this if
- * number of hosts returned is greater than 0
- * @return number of hosts returned in 'hosts', 0 on error
- */
- unsigned int
- GNUNET_TESTBED_hosts_load_from_loadleveler (const struct
- GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_TESTBED_Host ***hosts)
- {
- #if !ENABLE_SUPERMUC
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("The function %s is only available when compiled with (--with-ll)\n"),
- __func__);
- GNUNET_assert (0);
- #else
- const char *hostfile;
- if (NULL == (hostfile = getenv ("MP_SAVEHOSTFILE")))
- {
- GNUNET_break (0);
- return 0;
- }
- return GNUNET_TESTBED_hosts_load_from_file (hostfile, cfg, hosts);
- #endif
- }
- /**
- * Destroy a host handle. Must only be called once everything
- * running on that host has been stopped.
- *
- * @param host handle to destroy
- */
- void
- GNUNET_TESTBED_host_destroy (struct GNUNET_TESTBED_Host *host)
- {
- struct RegisteredController *rc;
- uint32_t id;
- GNUNET_assert (host->id < host_list_size);
- GNUNET_assert (host_list[host->id] == host);
- host_list[host->id] = NULL;
- /* clear registered controllers list */
- for (rc = host->rc_head; NULL != rc; rc = host->rc_head)
- {
- GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
- GNUNET_free (rc);
- }
- GNUNET_free_non_null ((char *) host->username);
- GNUNET_free_non_null ((char *) host->hostname);
- GNUNET_TESTBED_operation_queue_destroy_
- (host->opq_parallel_overlay_connect_operations);
- GNUNET_CONFIGURATION_destroy (host->cfg);
- GNUNET_free (host);
- while (host_list_size >= HOST_LIST_GROW_STEP)
- {
- for (id = host_list_size - 1; id > host_list_size - HOST_LIST_GROW_STEP;
- id--)
- if (NULL != host_list[id])
- break;
- if (id != host_list_size - HOST_LIST_GROW_STEP)
- break;
- if (NULL != host_list[id])
- break;
- host_list_size -= HOST_LIST_GROW_STEP;
- }
- host_list =
- GNUNET_realloc (host_list,
- sizeof (struct GNUNET_TESTBED_Host *) * host_list_size);
- }
- /**
- * Marks a host as registered with a controller
- *
- * @param host the host to mark
- * @param controller the controller at which this host is registered
- */
- void
- GNUNET_TESTBED_mark_host_registered_at_ (struct GNUNET_TESTBED_Host *host,
- const struct GNUNET_TESTBED_Controller
- *const controller)
- {
- struct RegisteredController *rc;
- for (rc = host->rc_head; NULL != rc; rc = rc->next)
- {
- if (controller == rc->controller) /* already registered at controller */
- {
- GNUNET_break (0);
- return;
- }
- }
- rc = GNUNET_new (struct RegisteredController);
- rc->controller = controller;
- GNUNET_CONTAINER_DLL_insert_tail (host->rc_head, host->rc_tail, rc);
- }
- /**
- * Unmarks a host registered at a controller
- *
- * @param host the host to unmark
- * @param controller the controller at which this host has to be unmarked
- */
- void
- GNUNET_TESTBED_deregister_host_at_ (struct GNUNET_TESTBED_Host *host,
- const struct GNUNET_TESTBED_Controller
- *const controller)
- {
- struct RegisteredController *rc;
- for (rc = host->rc_head; NULL != rc; rc=rc->next)
- if (controller == rc->controller)
- break;
- if (NULL == rc)
- {
- GNUNET_break (0);
- return;
- }
- GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
- GNUNET_free (rc);
- }
- /**
- * Checks whether a host has been registered
- *
- * @param host the host to check
- * @param controller the controller at which host's registration is checked
- * @return GNUNET_YES if registered; GNUNET_NO if not
- */
- int
- GNUNET_TESTBED_is_host_registered_ (const struct GNUNET_TESTBED_Host *host,
- const struct GNUNET_TESTBED_Controller
- *const controller)
- {
- struct RegisteredController *rc;
- for (rc = host->rc_head; NULL != rc; rc = rc->next)
- {
- if (controller == rc->controller) /* already registered at controller */
- {
- return GNUNET_YES;
- }
- }
- return GNUNET_NO;
- }
- /**
- * Handle for controller process
- */
- struct GNUNET_TESTBED_ControllerProc
- {
- /**
- * The process handle
- */
- struct GNUNET_HELPER_Handle *helper;
- /**
- * The arguments used to start the helper
- */
- char **helper_argv;
- /**
- * The host where the helper is run
- */
- struct GNUNET_TESTBED_Host *host;
- /**
- * The controller error callback
- */
- GNUNET_TESTBED_ControllerStatusCallback cb;
- /**
- * The closure for the above callback
- */
- void *cls;
- /**
- * The send handle for the helper
- */
- struct GNUNET_HELPER_SendHandle *shandle;
- /**
- * The message corresponding to send handle
- */
- struct GNUNET_MessageHeader *msg;
- };
- /**
- * Function to copy NULL terminated list of arguments
- *
- * @param argv the NULL terminated list of arguments. Cannot be NULL.
- * @return the copied NULL terminated arguments
- */
- static char **
- copy_argv (const char *const *argv)
- {
- char **argv_dup;
- unsigned int argp;
- GNUNET_assert (NULL != argv);
- for (argp = 0; NULL != argv[argp]; argp++) ;
- argv_dup = GNUNET_malloc (sizeof (char *) * (argp + 1));
- for (argp = 0; NULL != argv[argp]; argp++)
- argv_dup[argp] = GNUNET_strdup (argv[argp]);
- return argv_dup;
- }
- /**
- * Function to join NULL terminated list of arguments
- *
- * @param argv1 the NULL terminated list of arguments. Cannot be NULL.
- * @param argv2 the NULL terminated list of arguments. Cannot be NULL.
- * @return the joined NULL terminated arguments
- */
- static char **
- join_argv (const char *const *argv1, const char *const *argv2)
- {
- char **argvj;
- char *argv;
- unsigned int carg;
- unsigned int cnt;
- carg = 0;
- argvj = NULL;
- for (cnt = 0; NULL != argv1[cnt]; cnt++)
- {
- argv = GNUNET_strdup (argv1[cnt]);
- GNUNET_array_append (argvj, carg, argv);
- }
- for (cnt = 0; NULL != argv2[cnt]; cnt++)
- {
- argv = GNUNET_strdup (argv2[cnt]);
- GNUNET_array_append (argvj, carg, argv);
- }
- GNUNET_array_append (argvj, carg, NULL);
- return argvj;
- }
- /**
- * Frees the given NULL terminated arguments
- *
- * @param argv the NULL terminated list of arguments
- */
- static void
- free_argv (char **argv)
- {
- unsigned int argp;
- for (argp = 0; NULL != argv[argp]; argp++)
- GNUNET_free (argv[argp]);
- GNUNET_free (argv);
- }
- /**
- * Generates arguments for opening a remote shell. Builds up the arguments
- * from the environment variable GNUNET_TESTBED_RSH_CMD. The variable
- * should not mention `-p' (port) option and destination address as these will
- * be set locally in the function from its parameteres. If the environmental
- * variable is not found then it defaults to `ssh -o BatchMode=yes -o
- * NoHostAuthenticationForLocalhost=yes -o StrictHostkeyChecking=no -o
- * PasswordAuthentication=noc'
- *
- * @param port the destination port number
- * @param hostname the hostname of the target host
- * @param username the username to use while connecting to target host
- * @return NULL terminated list of arguments
- */
- static char **
- gen_rsh_args (const char *port, const char *hostname, const char *username)
- {
- static const char *default_ssh_args[] = {
- "ssh",
- "-o",
- "BatchMode=yes",
- "-o",
- "NoHostAuthenticationForLocalhost=yes",
- "-o",
- "StrictHostKeyChecking=no",
- "-o",
- "PasswordAuthentication=no",
- "%h",
- NULL
- };
- char **ssh_args;
- char *ssh_cmd;
- char *ssh_cmd_cp;
- char *arg;
- const char *new_arg;
- unsigned int size;
- unsigned int cnt;
- ssh_args = NULL;
- if (NULL != (ssh_cmd = getenv ("GNUNET_TESTBED_RSH_CMD")))
- {
- ssh_cmd = GNUNET_strdup (ssh_cmd);
- ssh_cmd_cp = ssh_cmd;
- for (size = 0; NULL != (arg = strtok (ssh_cmd, " ")); ssh_cmd = NULL)
- GNUNET_array_append (ssh_args, size, GNUNET_strdup (arg));
- GNUNET_free (ssh_cmd_cp);
- }
- else
- {
- ssh_args = copy_argv (default_ssh_args);
- size = (sizeof (default_ssh_args)) / (sizeof (const char *));
- GNUNET_array_grow (ssh_args, size, size - 1);
- }
- for (cnt = 0; cnt < size; cnt++)
- {
- arg = ssh_args[cnt];
- if ('%' != arg[0])
- continue;
- switch (arg[1])
- {
- case 'p':
- new_arg = port;
- break;
- case 'u':
- new_arg = username;
- break;
- case 'h':
- new_arg = hostname;
- break;
- default:
- continue;
- }
- if (NULL == new_arg)
- continue;
- GNUNET_free (arg);
- ssh_args[cnt] = GNUNET_strdup (new_arg);
- }
- GNUNET_array_append (ssh_args, size, NULL);
- return ssh_args;
- }
- /**
- * Generates the arguments needed for executing the given binary in a remote
- * shell. Builds the arguments from the environmental variable
- * GNUNET_TETSBED_RSH_CMD_SUFFIX. If the environmental variable is not found,
- * only the given binary name will be present in the returned arguments
- *
- * @param append_args the arguments to append after generating the suffix
- * arguments. Can be NULL; if not must be NULL terminated 'char *' array
- * @return NULL-terminated args
- */
- static char **
- gen_rsh_suffix_args (const char * const *append_args)
- {
- char **rshell_args;
- char *rshell_cmd;
- char *rshell_cmd_cp;
- char *arg;
- unsigned int cnt;
- unsigned int append_cnt;
- rshell_args = NULL;
- cnt = 0;
- if (NULL != (rshell_cmd = getenv ("GNUNET_TESTBED_RSH_CMD_SUFFIX")))
- {
- rshell_cmd = GNUNET_strdup (rshell_cmd);
- rshell_cmd_cp = rshell_cmd;
- for (; NULL != (arg = strtok (rshell_cmd, " ")); rshell_cmd = NULL)
- GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (arg));
- GNUNET_free (rshell_cmd_cp);
- }
- if (NULL != append_args)
- {
- for (append_cnt = 0; NULL != append_args[append_cnt]; append_cnt++)
- GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (append_args[append_cnt]));
- }
- GNUNET_array_append (rshell_args, cnt, NULL);
- return rshell_args;
- }
- /**
- * Functions with this signature are called whenever a
- * complete message is received by the tokenizer.
- *
- * Do not call GNUNET_SERVER_mst_destroy in callback
- *
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
- *
- * @return #GNUNET_OK on success, #GNUNET_SYSERR to stop further processing
- */
- static int
- helper_mst (void *cls,
- const struct GNUNET_MessageHeader *message)
- {
- struct GNUNET_TESTBED_ControllerProc *cp = cls;
- const struct GNUNET_TESTBED_HelperReply *msg;
- const char *hostname;
- char *config;
- uLongf config_size;
- uLongf xconfig_size;
- msg = (const struct GNUNET_TESTBED_HelperReply *) message;
- GNUNET_assert (sizeof (struct GNUNET_TESTBED_HelperReply) <
- ntohs (msg->header.size));
- GNUNET_assert (GNUNET_MESSAGE_TYPE_TESTBED_HELPER_REPLY ==
- ntohs (msg->header.type));
- config_size = (uLongf) ntohs (msg->config_size);
- xconfig_size =
- (uLongf) (ntohs (msg->header.size) -
- sizeof (struct GNUNET_TESTBED_HelperReply));
- config = GNUNET_malloc (config_size);
- GNUNET_assert (Z_OK ==
- uncompress ((Bytef *) config, &config_size,
- (const Bytef *) &msg[1], xconfig_size));
- /* Replace the configuration template present in the host with the
- controller's running configuration */
- GNUNET_CONFIGURATION_destroy (cp->host->cfg);
- cp->host->cfg = GNUNET_CONFIGURATION_create ();
- GNUNET_assert (GNUNET_CONFIGURATION_deserialize
- (cp->host->cfg,
- config,
- config_size,
- NULL));
- GNUNET_free (config);
- if (NULL == (hostname = GNUNET_TESTBED_host_get_hostname (cp->host)))
- hostname = "localhost";
- /* Change the hostname so that we can connect to it */
- GNUNET_CONFIGURATION_set_value_string (cp->host->cfg, "testbed", "hostname",
- hostname);
- cp->host->locked = GNUNET_NO;
- cp->host->controller_started = GNUNET_YES;
- cp->cb (cp->cls, cp->host->cfg, GNUNET_OK);
- return GNUNET_OK;
- }
- /**
- * Continuation function from GNUNET_HELPER_send()
- *
- * @param cls closure
- * @param result GNUNET_OK on success,
- * GNUNET_NO if helper process died
- * GNUNET_SYSERR during GNUNET_HELPER_stop
- */
- static void
- clear_msg (void *cls, int result)
- {
- struct GNUNET_TESTBED_ControllerProc *cp = cls;
- GNUNET_assert (NULL != cp->shandle);
- cp->shandle = NULL;
- GNUNET_free (cp->msg);
- cp->msg = NULL;
- }
- /**
- * Callback that will be called when the helper process dies. This is not called
- * when the helper process is stoped using GNUNET_HELPER_stop()
- *
- * @param cls the closure from GNUNET_HELPER_start()
- */
- static void
- helper_exp_cb (void *cls)
- {
- struct GNUNET_TESTBED_ControllerProc *cp = cls;
- GNUNET_TESTBED_ControllerStatusCallback cb;
- void *cb_cls;
- cb = cp->cb;
- cb_cls = cp->cls;
- cp->helper = NULL;
- GNUNET_TESTBED_controller_stop (cp);
- if (NULL != cb)
- cb (cb_cls, NULL, GNUNET_SYSERR);
- }
- /**
- * Starts a controller process at the given host. The given host's configuration
- * is used as a Template configuration to use for the remote controller; the
- * remote controller will be started with a slightly modified configuration
- * (port numbers, unix domain sockets and service home values are changed as per
- * TESTING library on the remote host). The modified configuration replaces the
- * host's existing configuration before signalling success through the
- * GNUNET_TESTBED_ControllerStatusCallback()
- *
- * @param trusted_ip the ip address of the controller which will be set as TRUSTED
- * HOST(all connections form this ip are permitted by the testbed) when
- * starting testbed controller at host. This can either be a single ip
- * address or a network address in CIDR notation.
- * @param host the host where the controller has to be started. CANNOT be NULL.
- * @param cb function called when the controller is successfully started or
- * dies unexpectedly; GNUNET_TESTBED_controller_stop shouldn't be
- * called if cb is called with GNUNET_SYSERR as status. Will never be
- * called in the same task as 'GNUNET_TESTBED_controller_start'
- * (synchronous errors will be signalled by returning NULL). This
- * parameter cannot be NULL.
- * @param cls closure for above callbacks
- * @return the controller process handle, NULL on errors
- */
- struct GNUNET_TESTBED_ControllerProc *
- GNUNET_TESTBED_controller_start (const char *trusted_ip,
- struct GNUNET_TESTBED_Host *host,
- GNUNET_TESTBED_ControllerStatusCallback cb,
- void *cls)
- {
- struct GNUNET_TESTBED_ControllerProc *cp;
- struct GNUNET_TESTBED_HelperInit *msg;
- const struct GNUNET_CONFIGURATION_Handle *cfg;
- const char *hostname;
- static char *const binary_argv[] = {
- HELPER_TESTBED_BINARY, NULL
- };
- GNUNET_assert (NULL != host);
- GNUNET_assert (NULL != (cfg = GNUNET_TESTBED_host_get_cfg_ (host)));
- hostname = NULL;
- API_VIOLATION (GNUNET_NO == host->locked,
- "Host is already locked by a previous call to GNUNET_TESTBED_controller_start()");
- host->locked = GNUNET_YES;
- API_VIOLATION (GNUNET_NO == host->controller_started,
- "Attempting to start a controller on a host which is already started a controller");
- cp = GNUNET_new (struct GNUNET_TESTBED_ControllerProc);
- if (0 == GNUNET_TESTBED_host_get_id_ (host))
- {
- cp->helper =
- GNUNET_HELPER_start (GNUNET_YES, HELPER_TESTBED_BINARY, binary_argv,
- &helper_mst, &helper_exp_cb, cp);
- }
- else
- {
- char *helper_binary_path_args[2];
- char **rsh_args;
- char **rsh_suffix_args;
- const char *username;
- char *port;
- char *argstr;
- char *aux;
- unsigned int cnt;
- username = host->username;
- hostname = host->hostname;
- GNUNET_asprintf (&port, "%u", host->port);
- LOG_DEBUG ("Starting remote connection to destination %s\n", hostname);
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (cfg, "testbed",
- "HELPER_BINARY_PATH",
- &helper_binary_path_args[0]))
- helper_binary_path_args[0] =
- GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
- helper_binary_path_args[1] = NULL;
- rsh_args = gen_rsh_args (port, hostname, username);
- rsh_suffix_args = gen_rsh_suffix_args ((const char **) helper_binary_path_args);
- cp->helper_argv =
- join_argv ((const char **) rsh_args, (const char **) rsh_suffix_args);
- free_argv (rsh_args);
- free_argv (rsh_suffix_args);
- GNUNET_free (port);
- argstr = GNUNET_strdup ("");
- for (cnt = 0; NULL != cp->helper_argv[cnt]; cnt++)
- {
- aux = argstr;
- GNUNET_assert (0 < GNUNET_asprintf (&argstr, "%s %s", aux, cp->helper_argv[cnt]));
- GNUNET_free (aux);
- }
- LOG_DEBUG ("Helper cmd str: %s\n", argstr);
- GNUNET_free (argstr);
- cp->helper =
- GNUNET_HELPER_start (GNUNET_NO, cp->helper_argv[0], cp->helper_argv, &helper_mst,
- &helper_exp_cb, cp);
- GNUNET_free (helper_binary_path_args[0]);
- }
- if (NULL == cp->helper)
- {
- if (NULL != cp->helper_argv)
- free_argv (cp->helper_argv);
- GNUNET_free (cp);
- return NULL;
- }
- cp->host = host;
- cp->cb = cb;
- cp->cls = cls;
- msg = GNUNET_TESTBED_create_helper_init_msg_ (trusted_ip, hostname, cfg);
- cp->msg = &msg->header;
- cp->shandle =
- GNUNET_HELPER_send (cp->helper, &msg->header, GNUNET_NO, &clear_msg, cp);
- if (NULL == cp->shandle)
- {
- GNUNET_free (msg);
- GNUNET_TESTBED_controller_stop (cp);
- return NULL;
- }
- return cp;
- }
- /**
- * Sends termination signal to the controller's helper process
- *
- * @param cproc the handle to the controller's helper process
- */
- void
- GNUNET_TESTBED_controller_kill_ (struct GNUNET_TESTBED_ControllerProc *cproc)
- {
- if (NULL != cproc->shandle)
- GNUNET_HELPER_send_cancel (cproc->shandle);
- if (NULL != cproc->helper)
- GNUNET_HELPER_kill (cproc->helper, GNUNET_YES);
- }
- /**
- * Cleans-up the controller's helper process handle
- *
- * @param cproc the handle to the controller's helper process
- */
- void
- GNUNET_TESTBED_controller_destroy_ (struct GNUNET_TESTBED_ControllerProc *cproc)
- {
- if (NULL != cproc->helper)
- {
- GNUNET_break (GNUNET_OK == GNUNET_HELPER_wait (cproc->helper));
- GNUNET_HELPER_destroy (cproc->helper);
- }
- if (NULL != cproc->helper_argv)
- free_argv (cproc->helper_argv);
- cproc->host->controller_started = GNUNET_NO;
- cproc->host->locked = GNUNET_NO;
- GNUNET_free_non_null (cproc->msg);
- GNUNET_free (cproc);
- }
- /**
- * Stop the controller process (also will terminate all peers and controllers
- * dependent on this controller). This function blocks until the testbed has
- * been fully terminated (!). The controller status cb from
- * GNUNET_TESTBED_controller_start() will not be called.
- *
- * @param cproc the controller process handle
- */
- void
- GNUNET_TESTBED_controller_stop (struct GNUNET_TESTBED_ControllerProc *cproc)
- {
- GNUNET_TESTBED_controller_kill_ (cproc);
- GNUNET_TESTBED_controller_destroy_ (cproc);
- }
- /**
- * The handle for whether a host is habitable or not
- */
- struct GNUNET_TESTBED_HostHabitableCheckHandle
- {
- /**
- * The host to check
- */
- const struct GNUNET_TESTBED_Host *host;
- /**
- * The callback to call once we have the status
- */
- GNUNET_TESTBED_HostHabitableCallback cb;
- /**
- * The callback closure
- */
- void *cb_cls;
- /**
- * The process handle for the SSH process
- */
- struct GNUNET_OS_Process *auxp;
- /**
- * The arguments used to start the helper
- */
- char **helper_argv;
- /**
- * Task id for the habitability check task
- */
- struct GNUNET_SCHEDULER_Task * habitability_check_task;
- /**
- * How long we wait before checking the process status. Should grow
- * exponentially
- */
- struct GNUNET_TIME_Relative wait_time;
- };
- /**
- * Task for checking whether a host is habitable or not
- *
- * @param cls GNUNET_TESTBED_HostHabitableCheckHandle
- */
- static void
- habitability_check (void *cls)
- {
- struct GNUNET_TESTBED_HostHabitableCheckHandle *h = cls;
- void *cb_cls;
- GNUNET_TESTBED_HostHabitableCallback cb;
- const struct GNUNET_TESTBED_Host *host;
- unsigned long code;
- enum GNUNET_OS_ProcessStatusType type;
- int ret;
- h->habitability_check_task = NULL;
- ret = GNUNET_OS_process_status (h->auxp, &type, &code);
- if (GNUNET_SYSERR == ret)
- {
- GNUNET_break (0);
- ret = GNUNET_NO;
- goto call_cb;
- }
- if (GNUNET_NO == ret)
- {
- h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
- h->habitability_check_task =
- GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
- return;
- }
- GNUNET_OS_process_destroy (h->auxp);
- h->auxp = NULL;
- ret = (0 != code) ? GNUNET_NO : GNUNET_YES;
- call_cb:
- if (NULL != h->auxp)
- GNUNET_OS_process_destroy (h->auxp);
- cb = h->cb;
- cb_cls = h->cb_cls;
- host = h->host;
- free_argv (h->helper_argv);
- GNUNET_free (h);
- if (NULL != cb)
- cb (cb_cls, host, ret);
- }
- /**
- * Checks whether a host can be used to start testbed service
- *
- * @param host the host to check
- * @param config the configuration handle to lookup the path of the testbed
- * helper
- * @param cb the callback to call to inform about habitability of the given host
- * @param cb_cls the closure for the callback
- * @return NULL upon any error or a handle which can be passed to
- * GNUNET_TESTBED_is_host_habitable_cancel()
- */
- struct GNUNET_TESTBED_HostHabitableCheckHandle *
- GNUNET_TESTBED_is_host_habitable (const struct GNUNET_TESTBED_Host *host,
- const struct GNUNET_CONFIGURATION_Handle
- *config,
- GNUNET_TESTBED_HostHabitableCallback cb,
- void *cb_cls)
- {
- struct GNUNET_TESTBED_HostHabitableCheckHandle *h;
- char **rsh_args;
- char **rsh_suffix_args;
- char *stat_args[3];
- const char *hostname;
- char *port;
- h = GNUNET_new (struct GNUNET_TESTBED_HostHabitableCheckHandle);
- h->cb = cb;
- h->cb_cls = cb_cls;
- h->host = host;
- hostname = (NULL == host->hostname) ? "127.0.0.1" : host->hostname;
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (config, "testbed",
- "HELPER_BINARY_PATH",
- &stat_args[1]))
- stat_args[1] =
- GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
- GNUNET_asprintf (&port, "%u", host->port);
- rsh_args = gen_rsh_args (port, hostname, host->username);
- GNUNET_free (port);
- port = NULL;
- stat_args[0] = "stat";
- stat_args[2] = NULL;
- rsh_suffix_args = gen_rsh_suffix_args ((const char **) stat_args);
- GNUNET_free (stat_args[1]);
- h->helper_argv = join_argv ((const char **) rsh_args,
- (const char **) rsh_suffix_args);
- free_argv (rsh_suffix_args);
- free_argv (rsh_args);
- h->auxp =
- GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ERR, NULL,
- NULL, NULL, h->helper_argv[0], h->helper_argv);
- if (NULL == h->auxp)
- {
- GNUNET_break (0); /* Cannot exec SSH? */
- GNUNET_free (h);
- return NULL;
- }
- h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
- h->habitability_check_task =
- GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
- return h;
- }
- /**
- * Function to cancel a request started using GNUNET_TESTBED_is_host_habitable()
- *
- * @param handle the habitability check handle
- */
- void
- GNUNET_TESTBED_is_host_habitable_cancel (struct
- GNUNET_TESTBED_HostHabitableCheckHandle
- *handle)
- {
- GNUNET_SCHEDULER_cancel (handle->habitability_check_task);
- (void) GNUNET_OS_process_kill (handle->auxp, GNUNET_TERM_SIG);
- (void) GNUNET_OS_process_wait (handle->auxp);
- GNUNET_OS_process_destroy (handle->auxp);
- free_argv (handle->helper_argv);
- GNUNET_free (handle);
- }
- /**
- * Register a host with the controller
- *
- * @param controller the controller handle
- * @param host the host to register
- * @param cc the completion callback to call to inform the status of
- * registration. After calling this callback the registration handle
- * will be invalid. Cannot be NULL.
- * @param cc_cls the closure for the cc
- * @return handle to the host registration which can be used to cancel the
- * registration
- */
- struct GNUNET_TESTBED_HostRegistrationHandle *
- GNUNET_TESTBED_register_host (struct GNUNET_TESTBED_Controller *controller,
- struct GNUNET_TESTBED_Host *host,
- GNUNET_TESTBED_HostRegistrationCompletion cc,
- void *cc_cls)
- {
- struct GNUNET_TESTBED_HostRegistrationHandle *rh;
- struct GNUNET_TESTBED_AddHostMessage *msg;
- const char *username;
- const char *hostname;
- char *config;
- char *cconfig;
- void *ptr;
- size_t cc_size;
- size_t config_size;
- uint16_t msg_size;
- uint16_t username_length;
- uint16_t hostname_length;
- if (NULL != controller->rh)
- return NULL;
- hostname = GNUNET_TESTBED_host_get_hostname (host);
- if (GNUNET_YES == GNUNET_TESTBED_is_host_registered_ (host, controller))
- {
- LOG (GNUNET_ERROR_TYPE_WARNING, "Host hostname: %s already registered\n",
- (NULL == hostname) ? "localhost" : hostname);
- return NULL;
- }
- rh = GNUNET_new (struct GNUNET_TESTBED_HostRegistrationHandle);
- rh->host = host;
- rh->c = controller;
- GNUNET_assert (NULL != cc);
- rh->cc = cc;
- rh->cc_cls = cc_cls;
- controller->rh = rh;
- username = GNUNET_TESTBED_host_get_username_ (host);
- username_length = 0;
- if (NULL != username)
- username_length = strlen (username);
- GNUNET_assert (NULL != hostname); /* Hostname must be present */
- hostname_length = strlen (hostname);
- GNUNET_assert (NULL != host->cfg);
- config = GNUNET_CONFIGURATION_serialize (host->cfg, &config_size);
- cc_size = GNUNET_TESTBED_compress_config_ (config, config_size, &cconfig);
- GNUNET_free (config);
- msg_size = (sizeof (struct GNUNET_TESTBED_AddHostMessage));
- msg_size += username_length;
- msg_size += hostname_length;
- msg_size += cc_size;
- msg = GNUNET_malloc (msg_size);
- msg->header.size = htons (msg_size);
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_TESTBED_ADD_HOST);
- msg->host_id = htonl (GNUNET_TESTBED_host_get_id_ (host));
- msg->ssh_port = htons (GNUNET_TESTBED_host_get_ssh_port_ (host));
- ptr = &msg[1];
- if (NULL != username)
- {
- msg->username_length = htons (username_length);
- GNUNET_memcpy (ptr, username, username_length);
- ptr += username_length;
- }
- msg->hostname_length = htons (hostname_length);
- GNUNET_memcpy (ptr, hostname, hostname_length);
- ptr += hostname_length;
- msg->config_size = htons (config_size);
- GNUNET_memcpy (ptr, cconfig, cc_size);
- ptr += cc_size;
- GNUNET_assert ((ptr - (void *) msg) == msg_size);
- GNUNET_free (cconfig);
- GNUNET_TESTBED_queue_message_ (controller,
- (struct GNUNET_MessageHeader *) msg);
- return rh;
- }
- /**
- * Cancel the pending registration. Note that if the registration message is
- * already sent to the service the cancellation has only the effect that the
- * registration completion callback for the registration is never called.
- *
- * @param handle the registration handle to cancel
- */
- void
- GNUNET_TESTBED_cancel_registration (struct GNUNET_TESTBED_HostRegistrationHandle
- *handle)
- {
- if (handle != handle->c->rh)
- {
- GNUNET_break (0);
- return;
- }
- handle->c->rh = NULL;
- GNUNET_free (handle);
- }
- /**
- * Queues the given operation in the queue for parallel overlay connects of the
- * given host
- *
- * @param h the host handle
- * @param op the operation to queue in the given host's parally overlay connect
- * queue
- */
- void
- GNUNET_TESTBED_host_queue_oc_ (struct GNUNET_TESTBED_Host *h,
- struct GNUNET_TESTBED_Operation *op)
- {
- GNUNET_TESTBED_operation_queue_insert_
- (h->opq_parallel_overlay_connect_operations, op);
- }
- /**
- * Resolves the hostname of the host to an ip address
- *
- * @param host the host whose hostname is to be resolved
- */
- void
- GNUNET_TESTBED_host_resolve_ (struct GNUNET_TESTBED_Host *host)
- {
- char *hostname;
- hostname = (char *) host->hostname;
- host->hostname = simple_resolve (hostname);
- if (NULL == host->hostname)
- {
- GNUNET_break (0);
- host->hostname = hostname;
- return;
- }
- GNUNET_free (hostname);
- host->hostname = GNUNET_strdup (host->hostname);
- }
- /* end of testbed_api_hosts.c */
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