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author | Christian Grothoff <christian@grothoff.org> | 2020-03-15 20:42:47 +0100 |
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committer | Christian Grothoff <christian@grothoff.org> | 2020-03-15 20:42:47 +0100 |
commit | c898a1e13b1f06dafec35051dfd232510bd28de3 (patch) | |
tree | 5d3bd099b02512744da3f71780da9330a97e8a2e /src/exchange/taler-exchange-transfer.c | |
parent | 4322bbf2f1722b4c53114901768772dabdb7e822 (diff) | |
download | exchange-c898a1e13b1f06dafec35051dfd232510bd28de3.tar.gz exchange-c898a1e13b1f06dafec35051dfd232510bd28de3.tar.bz2 exchange-c898a1e13b1f06dafec35051dfd232510bd28de3.zip |
clean up closer logic, improve error handling, simplify logic, add comments
Diffstat (limited to 'src/exchange/taler-exchange-transfer.c')
-rw-r--r-- | src/exchange/taler-exchange-transfer.c | 109 |
1 files changed, 68 insertions, 41 deletions
diff --git a/src/exchange/taler-exchange-transfer.c b/src/exchange/taler-exchange-transfer.c index a1d2d0596..1793dc988 100644 --- a/src/exchange/taler-exchange-transfer.c +++ b/src/exchange/taler-exchange-transfer.c @@ -13,7 +13,6 @@ You should have received a copy of the GNU Affero General Public License along with TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> */ - /** * @file taler-exchange-transfer.c * @brief Process that actually finalizes outgoing transfers with the wire gateway / bank @@ -98,10 +97,23 @@ static struct GNUNET_CURL_RescheduleContext *rc; static struct GNUNET_TIME_Relative aggregator_idle_sleep_interval; /** - * Value to return from main(). #GNUNET_OK on success, #GNUNET_SYSERR - * on serious errors. + * Value to return from main(). 0 on success, non-zero on errors. */ -static int global_ret; +static enum +{ + GR_SUCCESS = 0, + GR_WIRE_TRANSFER_FAILED = 1, + GR_DATABASE_COMMIT_HARD_FAIL = 2, + GR_INVARIANT_FAILURE = 3, + GR_WIRE_ACCOUNT_NOT_CONFIGURED = 4, + GR_WIRE_TRANSFER_BEGIN_FAIL = 5, + GR_DATABASE_TRANSACTION_BEGIN_FAIL = 6, + GR_DATABASE_SESSION_START_FAIL = 7, + GR_CONFIGURATION_INVALID = 8, + GR_CMD_LINE_UTF8_ERROR = 9, + GR_CMD_LINE_OPTIONS_WRONG = 10, + GR_DATABASE_FETCH_FAILURE = 11, +} global_ret; /** * #GNUNET_YES if we are in test mode and should exit when idle. @@ -110,16 +122,6 @@ static int test_mode; /** - * Execute the wire transfers that we have committed to - * do. - * - * @param cls NULL - */ -static void -run_transfers (void *cls); - - -/** * We're being aborted with CTRL-C (or SIGTERM). Shut down. * * @param cls closure @@ -170,7 +172,7 @@ shutdown_task (void *cls) * @return #GNUNET_OK on success */ static int -parse_wirewatch_config () +parse_wirewatch_config (void) { if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, @@ -227,7 +229,20 @@ commit_or_warn (struct TALER_EXCHANGEDB_Session *session) /** + * Execute the wire transfers that we have committed to + * do. + * + * @param cls NULL + */ +static void +run_transfers (void *cls); + + +/** * Function called with the result from the execute step. + * On success, we mark the respective wire transfer as finished, + * and in general we afterwards continue to #run_transfers(), + * except for irrecoverable errors. * * @param cls NULL * @param http_status_code #MHD_HTTP_OK on success @@ -257,7 +272,7 @@ wire_confirm_cb (void *cls, ec); db_plugin->rollback (db_plugin->cls, session); - global_ret = GNUNET_SYSERR; + global_ret = GR_WIRE_TRANSFER_FAILED; GNUNET_SCHEDULER_shutdown (); GNUNET_free (wpd); wpd = NULL; @@ -280,7 +295,7 @@ wire_confirm_cb (void *cls, } else { - global_ret = GNUNET_SYSERR; + global_ret = GR_DATABASE_COMMIT_HARD_FAIL; GNUNET_SCHEDULER_shutdown (); } GNUNET_free (wpd); @@ -299,7 +314,7 @@ wire_confirm_cb (void *cls, return; case GNUNET_DB_STATUS_HARD_ERROR: GNUNET_break (0); - global_ret = GNUNET_SYSERR; + global_ret = GR_DATABASE_COMMIT_HARD_FAIL; GNUNET_SCHEDULER_shutdown (); return; case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS: @@ -313,7 +328,7 @@ wire_confirm_cb (void *cls, return; default: GNUNET_break (0); - global_ret = GNUNET_SYSERR; + global_ret = GR_INVARIANT_FAILURE; GNUNET_SCHEDULER_shutdown (); return; } @@ -321,7 +336,8 @@ wire_confirm_cb (void *cls, /** - * Callback with data about a prepared transaction. + * Callback with data about a prepared transaction. Triggers the respective + * wire transfer using the prepared transaction data. * * @param cls NULL * @param rowid row identifier used to mark prepared transaction as done @@ -339,6 +355,15 @@ wire_prepare_cb (void *cls, struct TALER_EXCHANGEDB_WireAccount *wa; (void) cls; + if ( (NULL == wire_method) || + (NULL == buf) ) + { + GNUNET_break (0); + db_plugin->rollback (db_plugin->cls, + wpd->session); + global_ret = GR_DATABASE_FETCH_FAILURE; + goto cleanup; + } wpd->row_id = rowid; GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Starting wire transfer %llu\n", @@ -351,11 +376,8 @@ wire_prepare_cb (void *cls, GNUNET_break (0); db_plugin->rollback (db_plugin->cls, wpd->session); - global_ret = GNUNET_SYSERR; - GNUNET_SCHEDULER_shutdown (); - GNUNET_free (wpd); - wpd = NULL; - return; + global_ret = GR_WIRE_ACCOUNT_NOT_CONFIGURED; + goto cleanup; } wa = wpd->wa; wpd->eh = TALER_BANK_transfer (ctx, @@ -369,12 +391,14 @@ wire_prepare_cb (void *cls, GNUNET_break (0); /* Irrecoverable */ db_plugin->rollback (db_plugin->cls, wpd->session); - global_ret = GNUNET_SYSERR; - GNUNET_SCHEDULER_shutdown (); - GNUNET_free (wpd); - wpd = NULL; - return; + global_ret = GR_WIRE_TRANSFER_BEGIN_FAIL; + goto cleanup; } + return; +cleanup: + GNUNET_SCHEDULER_shutdown (); + GNUNET_free (wpd); + wpd = NULL; } @@ -398,7 +422,7 @@ run_transfers (void *cls) { GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to obtain database session!\n"); - global_ret = GNUNET_SYSERR; + global_ret = GR_DATABASE_SESSION_START_FAIL; GNUNET_SCHEDULER_shutdown (); return; } @@ -409,7 +433,7 @@ run_transfers (void *cls) { GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to start database transaction!\n"); - global_ret = GNUNET_SYSERR; + global_ret = GR_DATABASE_TRANSACTION_BEGIN_FAIL; GNUNET_SCHEDULER_shutdown (); return; } @@ -429,7 +453,7 @@ run_transfers (void *cls) { case GNUNET_DB_STATUS_HARD_ERROR: GNUNET_break (0); - global_ret = GNUNET_SYSERR; + global_ret = GR_DATABASE_COMMIT_HARD_FAIL; GNUNET_SCHEDULER_shutdown (); return; case GNUNET_DB_STATUS_SOFT_ERROR: @@ -440,15 +464,17 @@ run_transfers (void *cls) return; case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS: /* no more prepared wire transfers, go sleep a bit! */ - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "No more pending wire transfers, going idle\n"); GNUNET_assert (NULL == task); if (GNUNET_YES == test_mode) { + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + "No more pending wire transfers, shutting down (because we are in test mode)\n"); GNUNET_SCHEDULER_shutdown (); } else { + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + "No more pending wire transfers, going idle\n"); task = GNUNET_SCHEDULER_add_delayed (aggregator_idle_sleep_interval, &run_transfers, NULL); @@ -483,7 +509,7 @@ run (void *cls, if (GNUNET_OK != parse_wirewatch_config ()) { cfg = NULL; - global_ret = 1; + global_ret = GR_CONFIGURATION_INVALID; return; } ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule, @@ -525,19 +551,20 @@ main (int argc, GNUNET_GETOPT_OPTION_END }; - if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, - &argc, &argv)) - return 2; + if (GNUNET_OK != + GNUNET_STRINGS_get_utf8_args (argc, argv, + &argc, &argv)) + return GR_CMD_LINE_UTF8_ERROR; if (GNUNET_OK != GNUNET_PROGRAM_run (argc, argv, - "taler-exchange-transfers", + "taler-exchange-transfer", gettext_noop ( "background process that executes outgoing wire transfers"), options, &run, NULL)) { GNUNET_free ((void *) argv); - return 1; + return GR_CMD_LINE_OPTIONS_WRONG; } GNUNET_free ((void *) argv); return global_ret; |