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|
/*
This file is part of TALER
Copyright (C) 2018-2023 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
TALER 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 General Public License for more details.
You should have received a copy of the GNU General Public
License along with TALER; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file testing/testing_api_loop.c
* @brief main interpreter loop for testcases
* @author Christian Grothoff
* @author Marcello Stanisci
*/
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_extensions.h"
#include "taler_signatures.h"
#include "taler_testing_lib.h"
struct TALER_TESTING_Interpreter
{
/**
* Commands the interpreter will run.
*/
struct TALER_TESTING_Command *commands;
/**
* Interpreter task (if one is scheduled).
*/
struct GNUNET_SCHEDULER_Task *task;
/**
* Handle for the child management.
*/
struct GNUNET_ChildWaitHandle *cwh;
/**
* Main execution context for the main loop.
*/
struct GNUNET_CURL_Context *ctx;
/**
* Context for running the CURL event loop.
*/
struct GNUNET_CURL_RescheduleContext *rc;
/**
* Hash map mapping variable names to commands.
*/
struct GNUNET_CONTAINER_MultiHashMap *vars;
/**
* Task run on timeout.
*/
struct GNUNET_SCHEDULER_Task *timeout_task;
/**
* Instruction pointer. Tells #interpreter_run() which instruction to run
* next. Need (signed) int because it gets -1 when rewinding the
* interpreter to the first CMD.
*/
int ip;
/**
* Result of the testcases, #GNUNET_OK on success
*/
enum GNUNET_GenericReturnValue result;
};
const struct TALER_TESTING_Command *
TALER_TESTING_interpreter_lookup_command (struct TALER_TESTING_Interpreter *is,
const char *label)
{
if (NULL == label)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Attempt to lookup command for empty label\n");
return NULL;
}
/* Search backwards as we most likely reference recent commands */
for (int i = is->ip; i >= 0; i--)
{
const struct TALER_TESTING_Command *cmd = &is->commands[i];
/* Give precedence to top-level commands. */
if ( (NULL != cmd->label) &&
(0 == strcmp (cmd->label,
label)) )
return cmd;
if (TALER_TESTING_cmd_is_batch (cmd))
{
struct TALER_TESTING_Command *batch;
struct TALER_TESTING_Command *current;
struct TALER_TESTING_Command *icmd;
const struct TALER_TESTING_Command *match;
current = TALER_TESTING_cmd_batch_get_current (cmd);
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_batch_cmds (cmd,
&batch));
/* We must do the loop forward, but we can find the last match */
match = NULL;
for (unsigned int j = 0;
NULL != (icmd = &batch[j])->label;
j++)
{
if (current == icmd)
break; /* do not go past current command */
if ( (NULL != icmd->label) &&
(0 == strcmp (icmd->label,
label)) )
match = icmd;
}
if (NULL != match)
return match;
}
}
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Command not found: %s\n",
label);
return NULL;
}
const struct TALER_TESTING_Command *
TALER_TESTING_interpreter_get_command (struct TALER_TESTING_Interpreter *is,
const char *name)
{
const struct TALER_TESTING_Command *cmd;
struct GNUNET_HashCode h_name;
GNUNET_CRYPTO_hash (name,
strlen (name),
&h_name);
cmd = GNUNET_CONTAINER_multihashmap_get (is->vars,
&h_name);
if (NULL == cmd)
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Command not found by name: %s\n",
name);
return cmd;
}
struct GNUNET_CURL_Context *
TALER_TESTING_interpreter_get_context (struct TALER_TESTING_Interpreter *is)
{
return is->ctx;
}
void
TALER_TESTING_touch_cmd (struct TALER_TESTING_Interpreter *is)
{
is->commands[is->ip].last_req_time
= GNUNET_TIME_absolute_get ();
}
void
TALER_TESTING_inc_tries (struct TALER_TESTING_Interpreter *is)
{
is->commands[is->ip].num_tries++;
}
/**
* Run the main interpreter loop that performs exchange operations.
*
* @param cls contains the `struct InterpreterState`
*/
static void
interpreter_run (void *cls);
void
TALER_TESTING_interpreter_next (struct TALER_TESTING_Interpreter *is)
{
static unsigned long long ipc;
static struct GNUNET_TIME_Absolute last_report;
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
if (GNUNET_SYSERR == is->result)
return; /* ignore, we already failed! */
if (TALER_TESTING_cmd_is_batch (cmd))
{
if (TALER_TESTING_cmd_batch_next (is,
cmd->cls))
{
/* batch is done */
cmd->finish_time = GNUNET_TIME_absolute_get ();
is->ip++;
}
}
else
{
cmd->finish_time = GNUNET_TIME_absolute_get ();
is->ip++;
}
if (0 == (ipc % 1000))
{
if (0 != ipc)
GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
"Interpreter executed 1000 instructions in %s\n",
GNUNET_STRINGS_relative_time_to_string (
GNUNET_TIME_absolute_get_duration (last_report),
true));
last_report = GNUNET_TIME_absolute_get ();
}
ipc++;
is->task = GNUNET_SCHEDULER_add_now (&interpreter_run,
is);
}
void
TALER_TESTING_interpreter_fail (struct TALER_TESTING_Interpreter *is)
{
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed at command `%s'\n",
cmd->label);
while (TALER_TESTING_cmd_is_batch (cmd))
{
cmd = TALER_TESTING_cmd_batch_get_current (cmd);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Batch is at command `%s'\n",
cmd->label);
}
is->result = GNUNET_SYSERR;
GNUNET_SCHEDULER_shutdown ();
}
const char *
TALER_TESTING_interpreter_get_current_label (
struct TALER_TESTING_Interpreter *is)
{
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
return cmd->label;
}
static void
interpreter_run (void *cls)
{
struct TALER_TESTING_Interpreter *is = cls;
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
is->task = NULL;
if (NULL == cmd->label)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Running command END\n");
is->result = GNUNET_OK;
GNUNET_SCHEDULER_shutdown ();
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Running command `%s'\n",
cmd->label);
cmd->start_time
= cmd->last_req_time
= GNUNET_TIME_absolute_get ();
cmd->num_tries = 1;
if (NULL != cmd->name)
{
struct GNUNET_HashCode h_name;
GNUNET_CRYPTO_hash (cmd->name,
strlen (cmd->name),
&h_name);
(void) GNUNET_CONTAINER_multihashmap_put (
is->vars,
&h_name,
cmd,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
}
cmd->run (cmd->cls,
cmd,
is);
}
/**
* Function run when the test terminates (good or bad).
* Cleans up our state.
*
* @param cls the interpreter state.
*/
static void
do_shutdown (void *cls)
{
struct TALER_TESTING_Interpreter *is = cls;
struct TALER_TESTING_Command *cmd;
const char *label;
label = is->commands[is->ip].label;
if (NULL == label)
label = "END";
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Executing shutdown at `%s'\n",
label);
for (unsigned int j = 0;
NULL != (cmd = &is->commands[j])->label;
j++)
if (NULL != cmd->cleanup)
cmd->cleanup (cmd->cls,
cmd);
if (NULL != is->task)
{
GNUNET_SCHEDULER_cancel (is->task);
is->task = NULL;
}
if (NULL != is->ctx)
{
GNUNET_CURL_fini (is->ctx);
is->ctx = NULL;
}
if (NULL != is->rc)
{
GNUNET_CURL_gnunet_rc_destroy (is->rc);
is->rc = NULL;
}
if (NULL != is->vars)
{
GNUNET_CONTAINER_multihashmap_destroy (is->vars);
is->vars = NULL;
}
if (NULL != is->timeout_task)
{
GNUNET_SCHEDULER_cancel (is->timeout_task);
is->timeout_task = NULL;
}
if (NULL != is->cwh)
{
GNUNET_wait_child_cancel (is->cwh);
is->cwh = NULL;
}
GNUNET_free (is->commands);
}
/**
* Function run when the test terminates (good or bad) with timeout.
*
* @param cls the `struct TALER_TESTING_Interpreter *`
*/
static void
do_timeout (void *cls)
{
struct TALER_TESTING_Interpreter *is = cls;
is->timeout_task = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Terminating test due to timeout\n");
GNUNET_SCHEDULER_shutdown ();
}
/**
* Task triggered whenever we receive a SIGCHLD (child
* process died).
*
* @param cls the `struct TALER_TESTING_Interpreter *`
* @param type type of the process
* @param code status code of the process
*/
static void
maint_child_death (void *cls,
enum GNUNET_OS_ProcessStatusType type,
long unsigned int code)
{
struct TALER_TESTING_Interpreter *is = cls;
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
struct GNUNET_OS_Process **processp;
is->cwh = NULL;
while (TALER_TESTING_cmd_is_batch (cmd))
cmd = TALER_TESTING_cmd_batch_get_current (cmd);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Got SIGCHLD for `%s'.\n",
cmd->label);
if (GNUNET_OK !=
TALER_TESTING_get_trait_process (cmd,
&processp))
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Got the dead child process handle, waiting for termination ...\n");
GNUNET_OS_process_destroy (*processp);
*processp = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"... definitively terminated\n");
switch (type)
{
case GNUNET_OS_PROCESS_UNKNOWN:
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
case GNUNET_OS_PROCESS_RUNNING:
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
case GNUNET_OS_PROCESS_STOPPED:
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
case GNUNET_OS_PROCESS_EXITED:
if (0 != code)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Process exited with unexpected status %u\n",
(unsigned int) code);
TALER_TESTING_interpreter_fail (is);
return;
}
break;
case GNUNET_OS_PROCESS_SIGNALED:
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Dead child, go on with next command.\n");
TALER_TESTING_interpreter_next (is);
}
void
TALER_TESTING_wait_for_sigchld (struct TALER_TESTING_Interpreter *is)
{
struct GNUNET_OS_Process **processp;
struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
while (TALER_TESTING_cmd_is_batch (cmd))
cmd = TALER_TESTING_cmd_batch_get_current (cmd);
if (GNUNET_OK !=
TALER_TESTING_get_trait_process (cmd,
&processp))
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
GNUNET_assert (NULL == is->cwh);
is->cwh
= GNUNET_wait_child (*processp,
&maint_child_death,
is);
}
void
TALER_TESTING_run2 (struct TALER_TESTING_Interpreter *is,
struct TALER_TESTING_Command *commands,
struct GNUNET_TIME_Relative timeout)
{
unsigned int i;
if (NULL != is->timeout_task)
{
GNUNET_SCHEDULER_cancel (is->timeout_task);
is->timeout_task = NULL;
}
/* get the number of commands */
for (i = 0; NULL != commands[i].label; i++)
;
is->commands = GNUNET_malloc_large ( (i + 1)
* sizeof (struct TALER_TESTING_Command));
GNUNET_assert (NULL != is->commands);
GNUNET_memcpy (is->commands,
commands,
sizeof (struct TALER_TESTING_Command) * i);
is->timeout_task = GNUNET_SCHEDULER_add_delayed (
timeout,
&do_timeout,
is);
GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
is);
is->task = GNUNET_SCHEDULER_add_now (&interpreter_run,
is);
}
void
TALER_TESTING_run (struct TALER_TESTING_Interpreter *is,
struct TALER_TESTING_Command *commands)
{
TALER_TESTING_run2 (is,
commands,
GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES,
5));
}
/**
* Information used by the wrapper around the main
* "run" method.
*/
struct MainContext
{
/**
* Main "run" method.
*/
TALER_TESTING_Main main_cb;
/**
* Closure for @e main_cb.
*/
void *main_cb_cls;
/**
* Interpreter state.
*/
struct TALER_TESTING_Interpreter *is;
/**
* URL of the exchange.
*/
char *exchange_url;
};
/**
* Initialize scheduler loop and curl context for the testcase,
* and responsible to run the "run" method.
*
* @param cls closure, typically the "run" method, the
* interpreter state and a closure for "run".
*/
static void
main_wrapper (void *cls)
{
struct MainContext *main_ctx = cls;
main_ctx->main_cb (main_ctx->main_cb_cls,
main_ctx->is);
}
enum GNUNET_GenericReturnValue
TALER_TESTING_loop (TALER_TESTING_Main main_cb,
void *main_cb_cls)
{
struct TALER_TESTING_Interpreter is;
struct MainContext main_ctx = {
.main_cb = main_cb,
.main_cb_cls = main_cb_cls,
/* needed to init the curl ctx */
.is = &is,
};
memset (&is,
0,
sizeof (is));
is.ctx = GNUNET_CURL_init (
&GNUNET_CURL_gnunet_scheduler_reschedule,
&is.rc);
GNUNET_CURL_enable_async_scope_header (is.ctx,
"Taler-Correlation-Id");
GNUNET_assert (NULL != is.ctx);
is.rc = GNUNET_CURL_gnunet_rc_create (is.ctx);
is.vars = GNUNET_CONTAINER_multihashmap_create (1024,
false);
/* Blocking */
GNUNET_SCHEDULER_run (&main_wrapper,
&main_ctx);
return is.result;
}
int
TALER_TESTING_main (char *const *argv,
const char *loglevel,
const char *cfg_file,
const char *exchange_account_section,
enum TALER_TESTING_BankSystem bs,
struct TALER_TESTING_Credentials *cred,
TALER_TESTING_Main main_cb,
void *main_cb_cls)
{
enum GNUNET_GenericReturnValue ret;
unsetenv ("XDG_DATA_HOME");
unsetenv ("XDG_CONFIG_HOME");
GNUNET_log_setup (argv[0],
loglevel,
NULL);
if (GNUNET_OK !=
TALER_TESTING_get_credentials (cfg_file,
exchange_account_section,
bs,
cred))
{
GNUNET_break (0);
return 77;
}
if (GNUNET_OK !=
TALER_TESTING_cleanup_files_cfg (NULL,
cred->cfg))
{
GNUNET_break (0);
return 77;
}
if (GNUNET_OK !=
TALER_extensions_init (cred->cfg))
{
GNUNET_break (0);
return 77;
}
ret = TALER_TESTING_loop (main_cb,
main_cb_cls);
/* TODO: should we free 'cred' resources here? */
return (GNUNET_OK == ret) ? 0 : 1;
}
/* ************** iterate over commands ********* */
void
TALER_TESTING_iterate (struct TALER_TESTING_Interpreter *is,
bool asc,
TALER_TESTING_CommandIterator cb,
void *cb_cls)
{
unsigned int start;
unsigned int end;
int inc;
if (asc)
{
inc = 1;
start = 0;
end = is->ip;
}
else
{
inc = -1;
start = is->ip;
end = 0;
}
for (unsigned int off = start; off != end + inc; off += inc)
{
const struct TALER_TESTING_Command *cmd = &is->commands[off];
cb (cb_cls,
cmd);
}
}
/* ************** special commands ********* */
struct TALER_TESTING_Command
TALER_TESTING_cmd_end (void)
{
static struct TALER_TESTING_Command cmd;
cmd.label = NULL;
return cmd;
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_set_var (const char *name,
struct TALER_TESTING_Command cmd)
{
cmd.name = name;
return cmd;
}
/**
* State for a "rewind" CMD.
*/
struct RewindIpState
{
/**
* Instruction pointer to set into the interpreter.
*/
const char *target_label;
/**
* How many times this set should take place. However, this value lives at
* the calling process, and this CMD is only in charge of checking and
* decremeting it.
*/
unsigned int counter;
};
/**
* Seek for the @a target command in @a batch (and rewind to it
* if successful).
*
* @param is the interpreter state (for failures)
* @param cmd batch to search for @a target
* @param target command to search for
* @return #GNUNET_OK on success, #GNUNET_NO if target was not found,
* #GNUNET_SYSERR if target is in the future and we failed
*/
static enum GNUNET_GenericReturnValue
seek_batch (struct TALER_TESTING_Interpreter *is,
const struct TALER_TESTING_Command *cmd,
const struct TALER_TESTING_Command *target)
{
unsigned int new_ip;
struct TALER_TESTING_Command *batch;
struct TALER_TESTING_Command *current;
struct TALER_TESTING_Command *icmd;
struct TALER_TESTING_Command *match;
current = TALER_TESTING_cmd_batch_get_current (cmd);
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_batch_cmds (cmd,
&batch));
match = NULL;
for (new_ip = 0;
NULL != (icmd = &batch[new_ip]);
new_ip++)
{
if (current == target)
current = NULL;
if (icmd == target)
{
match = icmd;
break;
}
if (TALER_TESTING_cmd_is_batch (icmd))
{
int ret = seek_batch (is,
icmd,
target);
if (GNUNET_SYSERR == ret)
return GNUNET_SYSERR; /* failure! */
if (GNUNET_OK == ret)
{
match = icmd;
break;
}
}
}
if (NULL == current)
{
/* refuse to jump forward */
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return GNUNET_SYSERR;
}
if (NULL == match)
return GNUNET_NO; /* not found */
TALER_TESTING_cmd_batch_set_current (cmd,
new_ip);
return GNUNET_OK;
}
/**
* Run the "rewind" CMD.
*
* @param cls closure.
* @param cmd command being executed now.
* @param is the interpreter state.
*/
static void
rewind_ip_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is)
{
struct RewindIpState *ris = cls;
const struct TALER_TESTING_Command *target;
unsigned int new_ip;
(void) cmd;
if (0 == ris->counter)
{
TALER_TESTING_interpreter_next (is);
return;
}
target
= TALER_TESTING_interpreter_lookup_command (is,
ris->target_label);
if (NULL == target)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
ris->counter--;
for (new_ip = 0;
NULL != is->commands[new_ip].label;
new_ip++)
{
const struct TALER_TESTING_Command *cmd = &is->commands[new_ip];
if (cmd == target)
break;
if (TALER_TESTING_cmd_is_batch (cmd))
{
int ret = seek_batch (is,
cmd,
target);
if (GNUNET_SYSERR == ret)
return; /* failure! */
if (GNUNET_OK == ret)
break;
}
}
if (new_ip > (unsigned int) is->ip)
{
/* refuse to jump forward */
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
is->ip = new_ip - 1; /* -1 because the next function will advance by one */
TALER_TESTING_interpreter_next (is);
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_rewind_ip (const char *label,
const char *target_label,
unsigned int counter)
{
struct RewindIpState *ris;
ris = GNUNET_new (struct RewindIpState);
ris->target_label = target_label;
ris->counter = counter;
{
struct TALER_TESTING_Command cmd = {
.cls = ris,
.label = label,
.run = &rewind_ip_run
};
return cmd;
}
}
/**
* State for a "authchange" CMD.
*/
struct AuthchangeState
{
/**
* What is the new authorization token to send?
*/
const char *auth_token;
/**
* Old context, clean up on termination.
*/
struct GNUNET_CURL_Context *old_ctx;
};
/**
* Run the command.
*
* @param cls closure.
* @param cmd the command to execute.
* @param is the interpreter state.
*/
static void
authchange_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is)
{
struct AuthchangeState *ss = cls;
(void) cmd;
ss->old_ctx = is->ctx;
if (NULL != is->rc)
{
GNUNET_CURL_gnunet_rc_destroy (is->rc);
is->rc = NULL;
}
is->ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
&is->rc);
GNUNET_CURL_enable_async_scope_header (is->ctx,
"Taler-Correlation-Id");
GNUNET_assert (NULL != is->ctx);
is->rc = GNUNET_CURL_gnunet_rc_create (is->ctx);
if (NULL != ss->auth_token)
{
char *authorization;
GNUNET_asprintf (&authorization,
"%s: %s",
MHD_HTTP_HEADER_AUTHORIZATION,
ss->auth_token);
GNUNET_assert (GNUNET_OK ==
GNUNET_CURL_append_header (is->ctx,
authorization));
GNUNET_free (authorization);
}
TALER_TESTING_interpreter_next (is);
}
/**
* Call GNUNET_CURL_fini(). Done as a separate task to
* ensure that all of the command's cleanups have been
* executed first. See #7151.
*
* @param cls a `struct GNUNET_CURL_Context *` to clean up.
*/
static void
deferred_cleanup_cb (void *cls)
{
struct GNUNET_CURL_Context *ctx = cls;
GNUNET_CURL_fini (ctx);
}
/**
* Cleanup the state from a "authchange" CMD.
*
* @param cls closure.
* @param cmd the command which is being cleaned up.
*/
static void
authchange_cleanup (void *cls,
const struct TALER_TESTING_Command *cmd)
{
struct AuthchangeState *ss = cls;
(void) cmd;
if (NULL != ss->old_ctx)
{
(void) GNUNET_SCHEDULER_add_now (&deferred_cleanup_cb,
ss->old_ctx);
ss->old_ctx = NULL;
}
GNUNET_free (ss);
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_set_authorization (const char *label,
const char *auth_token)
{
struct AuthchangeState *ss;
ss = GNUNET_new (struct AuthchangeState);
ss->auth_token = auth_token;
{
struct TALER_TESTING_Command cmd = {
.cls = ss,
.label = label,
.run = &authchange_run,
.cleanup = &authchange_cleanup
};
return cmd;
}
}
/* end of testing_api_loop.c */
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