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Diffstat (limited to 'contrib/omamqp1/omamqp1.c')
| -rw-r--r-- | contrib/omamqp1/omamqp1.c | 921 |
1 files changed, 921 insertions, 0 deletions
diff --git a/contrib/omamqp1/omamqp1.c b/contrib/omamqp1/omamqp1.c new file mode 100644 index 0000000..38d0022 --- /dev/null +++ b/contrib/omamqp1/omamqp1.c @@ -0,0 +1,921 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + * + * omamqp1.c + * + * This output plugin enables rsyslog to send messages to an AMQP 1.0 protocol + * compliant message bus. + * + * AMQP glue code Copyright (C) 2015-2016 Kenneth A. Giusti + * <kgiusti@gmail.com> + */ + +#include "config.h" +#include "rsyslog.h" +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <signal.h> +#include <errno.h> +#include <unistd.h> +#include "conf.h" +#include "syslogd-types.h" +#include "srUtils.h" +#include "template.h" +#include "module-template.h" +#include "errmsg.h" +#include "cfsysline.h" + +#include <pthread.h> +#include <time.h> +#include <proton/reactor.h> +#include <proton/handlers.h> +#include <proton/event.h> +#include <proton/connection.h> +#include <proton/session.h> +#include <proton/link.h> +#include <proton/delivery.h> +#include <proton/message.h> +#include <proton/transport.h> +#include <proton/sasl.h> +#include <proton/url.h> +#include <proton/version.h> + + +/* work-around issues in this contributed module */ +#pragma GCC diagnostic ignored "-Wswitch-enum" +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" + +MODULE_TYPE_OUTPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("omamqp1") + + +/* internal structures + */ +DEF_OMOD_STATIC_DATA + + +/* Settings for the action */ +typedef struct _configSettings { + pn_url_t *url; /* address of message bus */ + uchar *username; /* authentication credentials */ + uchar *password; + uchar *target; /* endpoint for sent log messages */ + uchar *templateName; + int bDisableSASL; /* do not enable SASL? 0-enable 1-disable */ + int idleTimeout; /* disconnect idle connection (seconds) */ + int reconnectDelay; /* pause before re-connecting (seconds) */ + int maxRetries; /* drop unrouteable messages after maxRetries attempts */ +} configSettings_t; + + +/* Control for communicating with the protocol engine thread */ + +typedef enum { // commands sent to protocol thread + COMMAND_DONE, // marks command complete + COMMAND_SEND, // send a message to the message bus + COMMAND_IS_READY, // is the connection to the message bus active? + COMMAND_SHUTDOWN // cleanup and terminate protocol thread. +} commands_t; + + +typedef struct _threadIPC { + pthread_mutex_t lock; + pthread_cond_t condition; + commands_t command; + rsRetVal result; // of command + pn_message_t *message; + uint64_t tag; // per message id +} threadIPC_t; + + +/* per-instance data */ + +typedef struct _instanceData { + configSettings_t config; + threadIPC_t ipc; + int bThreadRunning; + pthread_t thread_id; + pn_reactor_t *reactor; + pn_handler_t *handler; + pn_message_t *message; + int log_count; +} instanceData; + +typedef struct wrkrInstanceData { + instanceData *pData; +} wrkrInstanceData_t; + + +/* glue code */ + +typedef void dispatch_t(pn_handler_t *, pn_event_t *, pn_event_type_t); + +static void _init_thread_ipc(threadIPC_t *pIPC); +static void _clean_thread_ipc(threadIPC_t *ipc); +static void _init_config_settings(configSettings_t *pConfig); +static void _clean_config_settings(configSettings_t *pConfig); +static rsRetVal _shutdown_thread(instanceData *pData); +static rsRetVal _new_handler(pn_handler_t **handler, + pn_reactor_t *reactor, + dispatch_t *dispatcher, + configSettings_t *config, + threadIPC_t *ipc); +static void _del_handler(pn_handler_t *handler); +static rsRetVal _launch_protocol_thread(instanceData *pData); +static rsRetVal _shutdown_thread(instanceData *pData); +static rsRetVal _issue_command(threadIPC_t *ipc, + pn_reactor_t *reactor, + commands_t command, + pn_message_t *message); +static void dispatcher(pn_handler_t *handler, + pn_event_t *event, + pn_event_type_t type); + + +/* tables for interfacing with the v6 config system */ +/* action (instance) parameters */ +static struct cnfparamdescr actpdescr[] = { + { "host", eCmdHdlrGetWord, CNFPARAM_REQUIRED }, + { "target", eCmdHdlrGetWord, CNFPARAM_REQUIRED }, + { "username", eCmdHdlrGetWord, 0 }, + { "password", eCmdHdlrGetWord, 0 }, + { "template", eCmdHdlrGetWord, 0 }, + { "idleTimeout", eCmdHdlrNonNegInt, 0 }, + { "reconnectDelay", eCmdHdlrPositiveInt, 0 }, + { "maxRetries", eCmdHdlrNonNegInt, 0 }, + { "disableSASL", eCmdHdlrInt, 0 } +}; +static struct cnfparamblk actpblk = { + CNFPARAMBLK_VERSION, + sizeof(actpdescr)/sizeof(struct cnfparamdescr), + actpdescr +}; + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature +{ + if (eFeat == sFEATURERepeatedMsgReduction) + iRet = RS_RET_OK; +} +ENDisCompatibleWithFeature + + +BEGINcreateInstance +CODESTARTcreateInstance +{ + memset(pData, 0, sizeof(instanceData)); + _init_config_settings(&pData->config); + _init_thread_ipc(&pData->ipc); +} +ENDcreateInstance + + +BEGINcreateWrkrInstance +CODESTARTcreateWrkrInstance +ENDcreateWrkrInstance + + +BEGINfreeWrkrInstance +CODESTARTfreeWrkrInstance +ENDfreeWrkrInstance + + +BEGINfreeInstance +CODESTARTfreeInstance +{ + _shutdown_thread(pData); + _clean_config_settings(&pData->config); + _clean_thread_ipc(&pData->ipc); + if (pData->reactor) pn_reactor_free(pData->reactor); + if (pData->handler) pn_handler_free(pData->handler); + if (pData->message) pn_message_free(pData->message); +} +ENDfreeInstance + + +BEGINdbgPrintInstInfo +CODESTARTdbgPrintInstInfo +{ + configSettings_t *cfg = &pData->config; + dbgprintf("omamqp1:\n"); + dbgprintf(" host=%s\n", pn_url_str(cfg->url)); + dbgprintf(" username=%s\n", cfg->username); + //dbgprintf(" password=%s\n", pData->password); + dbgprintf(" target=%s\n", cfg->target); + dbgprintf(" template=%s\n", cfg->templateName); + dbgprintf(" disableSASL=%d\n", cfg->bDisableSASL); + dbgprintf(" idleTimeout=%d\n", cfg->idleTimeout); + dbgprintf(" reconnectDelay=%d\n", cfg->reconnectDelay); + dbgprintf(" maxRetries=%d\n", cfg->maxRetries); + dbgprintf(" running=%d\n", pData->bThreadRunning); +} +ENDdbgPrintInstInfo + + +BEGINtryResume +CODESTARTtryResume +{ + // is the link active? + instanceData *pData = pWrkrData->pData; + iRet = _issue_command(&pData->ipc, pData->reactor, COMMAND_IS_READY, NULL); +} +ENDtryResume + + +BEGINbeginTransaction +CODESTARTbeginTransaction +{ + DBGPRINTF("omamqp1: beginTransaction\n"); + instanceData *pData = pWrkrData->pData; + pData->log_count = 0; + if (pData->message) pn_message_free(pData->message); + pData->message = pn_message(); + CHKmalloc(pData->message); + pn_data_t *body = pn_message_body(pData->message); + pn_data_put_list(body); + pn_data_enter(body); +} +finalize_it: +ENDbeginTransaction + + +BEGINdoAction +CODESTARTdoAction +{ + DBGPRINTF("omamqp1: doAction\n"); + instanceData *pData = pWrkrData->pData; + if (!pData->message) ABORT_FINALIZE(RS_RET_OK); + pn_bytes_t msg = pn_bytes(strlen((const char *)ppString[0]), + (const char *)ppString[0]); + pn_data_t *body = pn_message_body(pData->message); + pn_data_put_string(body, msg); + pData->log_count++; + iRet = RS_RET_DEFER_COMMIT; +} +finalize_it: +ENDdoAction + + +BEGINendTransaction +CODESTARTendTransaction +{ + DBGPRINTF("omamqp1: endTransaction\n"); + instanceData *pData = pWrkrData->pData; + if (!pData->message) ABORT_FINALIZE(RS_RET_OK); + pn_data_t *body = pn_message_body(pData->message); + pn_data_exit(body); + pn_message_t *message = pData->message; + pData->message = NULL; + if (pData->log_count > 0) { + DBGPRINTF("omamqp1: sending [%d] records\n", pData->log_count); + CHKiRet(_issue_command(&pData->ipc, pData->reactor, COMMAND_SEND, message)); + } else { + DBGPRINTF("omamqp1: no log messages to send\n"); + pn_message_free(message); + } +} +finalize_it: +ENDendTransaction + + +BEGINnewActInst + struct cnfparamvals *pvals; + int i; + configSettings_t *cs; +CODESTARTnewActInst +{ + if ((pvals = nvlstGetParams(lst, &actpblk, NULL)) == NULL) { + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + CHKiRet(createInstance(&pData)); + cs = &pData->config; + + CODE_STD_STRING_REQUESTnewActInst(1); + + for(i = 0 ; i < actpblk.nParams ; ++i) { + if (!pvals[i].bUsed) + continue; + if (!strcmp(actpblk.descr[i].name, "host")) { + char *u = es_str2cstr(pvals[i].val.d.estr, NULL); + cs->url = pn_url_parse(u); + if (!cs->url) { + LogError(0, RS_RET_CONF_PARSE_ERROR, "omamqp1: Invalid host URL configured: '%s'", u); + free(u); + ABORT_FINALIZE(RS_RET_CONF_PARSE_ERROR); + } + free(u); + } else if (!strcmp(actpblk.descr[i].name, "template")) { + cs->templateName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if (!strcmp(actpblk.descr[i].name, "target")) { + cs->target = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if (!strcmp(actpblk.descr[i].name, "username")) { + cs->username = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if (!strcmp(actpblk.descr[i].name, "password")) { + cs->password = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if (!strcmp(actpblk.descr[i].name, "reconnectDelay")) { + cs->reconnectDelay = (int) pvals[i].val.d.n; + } else if (!strcmp(actpblk.descr[i].name, "idleTimeout")) { + cs->idleTimeout = (int) pvals[i].val.d.n; + } else if (!strcmp(actpblk.descr[i].name, "maxRetries")) { + cs->maxRetries = (int) pvals[i].val.d.n; + } else if (!strcmp(actpblk.descr[i].name, "disableSASL")) { + cs->bDisableSASL = (int) pvals[i].val.d.n; + } else { + dbgprintf("omamqp1: program error, unrecognized param '%s', ignored.\n", + actpblk.descr[i].name); + } + } + + CHKiRet(OMSRsetEntry(*ppOMSR, 0, (uchar*)strdup((cs->templateName == NULL) + ? "RSYSLOG_FileFormat" : (char*)cs->templateName), OMSR_NO_RQD_TPL_OPTS)); + + // once configuration is known, start the protocol engine thread + pData->reactor = pn_reactor(); + CHKmalloc(pData->reactor); + CHKiRet(_new_handler(&pData->handler, pData->reactor, dispatcher, &pData->config, &pData->ipc)); + CHKiRet(_launch_protocol_thread(pData)); +} +CODE_STD_FINALIZERnewActInst + cnfparamvalsDestruct(pvals, &actpblk); +ENDnewActInst + + +NO_LEGACY_CONF_parseSelectorAct + + +BEGINmodExit +CODESTARTmodExit +ENDmodExit + + +BEGINqueryEtryPt + CODESTARTqueryEtryPt + CODEqueryEtryPt_STD_OMOD_QUERIES + CODEqueryEtryPt_STD_CONF2_CNFNAME_QUERIES + CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES + CODEqueryEtryPt_TXIF_OMOD_QUERIES /* use transaction interface */ + CODEqueryEtryPt_STD_OMOD8_QUERIES +ENDqueryEtryPt + + +BEGINmodInit() +CODESTARTmodInit +{ + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current + interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + INITChkCoreFeature(bCoreSupportsBatching, CORE_FEATURE_BATCHING); + DBGPRINTF("omamqp1: module compiled with rsyslog version %s.\n", VERSION); + DBGPRINTF("omamqp1: %susing transactional output interface.\n", bCoreSupportsBatching ? "" : "not "); +} +ENDmodInit + + +/////////////////////////////////////// +// All the Proton-specific glue code // +/////////////////////////////////////// + + +/* state maintained by the protocol thread */ + +typedef struct { + const configSettings_t *config; + threadIPC_t *ipc; + pn_reactor_t *reactor; // AMQP 1.0 protocol engine + pn_connection_t *conn; + pn_link_t *sender; + pn_delivery_t *delivery; + char *encode_buffer; + size_t buffer_size; + uint64_t tag; + int msgs_sent; + int msgs_settled; + int retries; + sbool stopped; +} protocolState_t; + +// protocolState_t is embedded in the engine handler +#define PROTOCOL_STATE(eh) ((protocolState_t *) pn_handler_mem(eh)) + + +static void _init_config_settings(configSettings_t *pConfig) +{ + memset(pConfig, 0, sizeof(configSettings_t)); + pConfig->reconnectDelay = 5; + pConfig->maxRetries = 10; +} + + +static void _clean_config_settings(configSettings_t *pConfig) +{ + if (pConfig->url) pn_url_free(pConfig->url); + if (pConfig->username) free(pConfig->username); + if (pConfig->password) free(pConfig->password); + if (pConfig->target) free(pConfig->target); + if (pConfig->templateName) free(pConfig->templateName); + memset(pConfig, 0, sizeof(configSettings_t)); +} + + +static void _init_thread_ipc(threadIPC_t *pIPC) +{ + memset(pIPC, 0, sizeof(threadIPC_t)); + pthread_mutex_init(&pIPC->lock, NULL); + pthread_cond_init(&pIPC->condition, NULL); + pIPC->command = COMMAND_DONE; + pIPC->result = RS_RET_OK; +} + +static void _clean_thread_ipc(threadIPC_t *ipc) +{ + pthread_cond_destroy(&ipc->condition); + pthread_mutex_destroy(&ipc->lock); +} + + +// create a new handler for the engine and set up the protocolState +static rsRetVal _new_handler(pn_handler_t **handler, + pn_reactor_t *reactor, + dispatch_t *dispatch, + configSettings_t *config, + threadIPC_t *ipc) +{ + DEFiRet; + *handler = pn_handler_new(dispatch, sizeof(protocolState_t), _del_handler); + CHKmalloc(*handler); + pn_handler_add(*handler, pn_handshaker()); + protocolState_t *pState = PROTOCOL_STATE(*handler); + memset(pState, 0, sizeof(protocolState_t)); + pState->buffer_size = 64; // will grow if not enough + pState->encode_buffer = (char *)malloc(pState->buffer_size); + CHKmalloc(pState->encode_buffer); + pState->reactor = reactor; + pState->stopped = false; + // these are _references_, don't free them: + pState->config = config; + pState->ipc = ipc; + +finalize_it: + RETiRet; +} + + +// in case existing buffer too small +static rsRetVal _grow_buffer(protocolState_t *pState) +{ + DEFiRet; + pState->buffer_size *= 2; + free(pState->encode_buffer); + pState->encode_buffer = (char *)malloc(pState->buffer_size); + CHKmalloc(pState->encode_buffer); + +finalize_it: + RETiRet; +} + + +/* release the pn_handler_t instance. Do not call this directly, + * it will be called by the reactor when all references to the + * handler have been released. + */ +static void _del_handler(pn_handler_t *handler) +{ + protocolState_t *pState = PROTOCOL_STATE(handler); + if (pState->encode_buffer) free(pState->encode_buffer); +} + + +// Close the sender and its parent session and connection +static void _close_connection(protocolState_t *ps) +{ + if (ps->sender) { + pn_link_close(ps->sender); + pn_session_close(pn_link_session(ps->sender)); + } + if (ps->conn) pn_connection_close(ps->conn); +} + +static void _abort_command(protocolState_t *ps) +{ + threadIPC_t *ipc = ps->ipc; + + pthread_mutex_lock(&ipc->lock); + switch (ipc->command) { + case COMMAND_SEND: + dbgprintf("omamqp1: aborted the message send in progress\n"); + CASE_FALLTHROUGH + case COMMAND_IS_READY: + ipc->result = RS_RET_SUSPENDED; + ipc->command = COMMAND_DONE; + pthread_cond_signal(&ipc->condition); + break; + case COMMAND_SHUTDOWN: // cannot be aborted + case COMMAND_DONE: + break; + } + pthread_mutex_unlock(&ipc->lock); +} + + +// log a protocol error received from the message bus +static void _log_error(const char *message, pn_condition_t *cond) +{ + const char *name = pn_condition_get_name(cond); + const char *desc = pn_condition_get_description(cond); + dbgprintf("omamqp1: %s %s:%s\n", + message, + (name) ? name : "<no name>", + (desc) ? desc : "<no description>"); +} + + +/* is the link ready to send messages? */ +static sbool _is_ready(pn_link_t *link) +{ + return (link + && pn_link_state(link) == (PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE) + && pn_link_credit(link) > 0); +} + + +/* Process each event emitted by the protocol engine */ +static void dispatcher(pn_handler_t *handler, pn_event_t *event, pn_event_type_t type) +{ + protocolState_t *ps = PROTOCOL_STATE(handler); + const configSettings_t *cfg = ps->config; + + //DBGPRINTF("omamqp1: Event received: %s\n", pn_event_type_name(type)); + + switch (type) { + + case PN_LINK_REMOTE_OPEN: + DBGPRINTF("omamqp1: Message bus opened link.\n"); + break; + + case PN_DELIVERY: + // has the message been delivered to the message bus? + if (ps->delivery) { + assert(ps->delivery == pn_event_delivery(event)); + if (pn_delivery_updated(ps->delivery)) { + rsRetVal result = RS_RET_IDLE; + uint64_t rs = pn_delivery_remote_state(ps->delivery); + switch (rs) { + case PN_ACCEPTED: + DBGPRINTF("omamqp1: Message ACCEPTED by message bus\n"); + result = RS_RET_OK; + break; + case PN_REJECTED: + dbgprintf("omamqp1: message bus rejected log message: invalid message - dropping\n"); + // message bus considers this a 'bad message'. Cannot be redelivered. + // Likely a configuration error. Drop the message by returning OK + result = RS_RET_OK; + break; + case PN_RELEASED: + case PN_MODIFIED: + // the message bus cannot accept the message. This may be temporary - retry + // up to maxRetries before dropping + if (++ps->retries >= cfg->maxRetries) { + dbgprintf("omamqp1: message bus failed to accept message - dropping\n"); + result = RS_RET_OK; + } else { + dbgprintf("omamqp1: message bus cannot accept message, retrying\n"); + result = RS_RET_SUSPENDED; + } + break; + case PN_RECEIVED: + // not finished yet, wait for next delivery update + break; + default: + // no other terminal states defined, so ignore anything else + dbgprintf("omamqp1: unknown delivery state=0x%lX, assuming message accepted\n", + (unsigned long) pn_delivery_remote_state(ps->delivery)); + result = RS_RET_OK; + break; + } + + if (result != RS_RET_IDLE) { + // the command is complete + threadIPC_t *ipc = ps->ipc; + pthread_mutex_lock(&ipc->lock); + assert(ipc->command == COMMAND_SEND); + ipc->result = result; + ipc->command = COMMAND_DONE; + pthread_cond_signal(&ipc->condition); + pthread_mutex_unlock(&ipc->lock); + pn_delivery_settle(ps->delivery); + ps->delivery = NULL; + if (result == RS_RET_OK) { + ps->retries = 0; + } + } + } + } + break; + + + case PN_CONNECTION_BOUND: + if (!cfg->bDisableSASL) { + // force use of SASL, even allowing PLAIN authentication + pn_sasl_t *sasl = pn_sasl(pn_event_transport(event)); +#if PN_VERSION_MAJOR == 0 && PN_VERSION_MINOR >= 10 + pn_sasl_set_allow_insecure_mechs(sasl, true); +#else + // proton version <= 0.9 only supports PLAIN authentication + const char *user = cfg->username + ? (char *)cfg->username + : pn_url_get_username(cfg->url); + if (user) { + pn_sasl_plain(sasl, user, (cfg->password + ? (char *) cfg->password + : pn_url_get_password(cfg->url))); + } +#endif + } + if (cfg->idleTimeout) { + // configured as seconds, set as milliseconds + pn_transport_set_idle_timeout(pn_event_transport(event), + cfg->idleTimeout * 1000); + } + break; + + case PN_CONNECTION_UNBOUND: + DBGPRINTF("omamqp1: cleaning up connection resources\n"); + pn_connection_release(pn_event_connection(event)); + ps->conn = NULL; + ps->sender = NULL; + ps->delivery = NULL; + break; + + + case PN_TRANSPORT_ERROR: + { + // TODO: if auth failure, does it make sense to retry??? + pn_transport_t *tport = pn_event_transport(event); + pn_condition_t *cond = pn_transport_condition(tport); + if (pn_condition_is_set(cond)) { + _log_error("transport failure", cond); + } + dbgprintf("omamqp1: network transport failed, reconnecting...\n"); + // the protocol thread will attempt to reconnect if it is not + // being shut down + } + break; + + default: + break; + } +} + + +// Send a command to the protocol thread and +// wait for the command to complete +static rsRetVal _issue_command(threadIPC_t *ipc, + pn_reactor_t *reactor, + commands_t command, + pn_message_t *message) +{ + DEFiRet; + + DBGPRINTF("omamqp1: Sending command %d to protocol thread\n", command); + + pthread_mutex_lock(&ipc->lock); + + if (message) { + assert(ipc->message == NULL); + ipc->message = message; + } + assert(ipc->command == COMMAND_DONE); + ipc->command = command; + pn_reactor_wakeup(reactor); + while (ipc->command != COMMAND_DONE) { + pthread_cond_wait(&ipc->condition, &ipc->lock); + } + iRet = ipc->result; + if (ipc->message) { + pn_message_free(ipc->message); + ipc->message = NULL; + } + + pthread_mutex_unlock(&ipc->lock); + + DBGPRINTF("omamqp1: Command %d completed, status=%d\n", command, iRet); + RETiRet; +} + + +// check if a command needs processing +static void _poll_command(protocolState_t *ps) +{ + if (ps->stopped) return; + + threadIPC_t *ipc = ps->ipc; + + pthread_mutex_lock(&ipc->lock); + + switch (ipc->command) { + + case COMMAND_SHUTDOWN: + DBGPRINTF("omamqp1: Protocol thread processing shutdown command\n"); + ps->stopped = true; + _close_connection(ps); + // wait for the shutdown to complete before ack'ing this command + break; + + case COMMAND_IS_READY: + DBGPRINTF("omamqp1: Protocol thread processing ready query command\n"); + ipc->result = _is_ready(ps->sender) + ? RS_RET_OK + : RS_RET_SUSPENDED; + ipc->command = COMMAND_DONE; + pthread_cond_signal(&ipc->condition); + break; + + case COMMAND_SEND: + if (ps->delivery) break; // currently processing this command + DBGPRINTF("omamqp1: Protocol thread processing send message command\n"); + if (!_is_ready(ps->sender)) { + ipc->result = RS_RET_SUSPENDED; + ipc->command = COMMAND_DONE; + pthread_cond_signal(&ipc->condition); + break; + } + + // send the message + ++ps->tag; + ps->delivery = pn_delivery(ps->sender, + pn_dtag((const char *)&ps->tag, sizeof(ps->tag))); + pn_message_t *message = ipc->message; + assert(message); + + int rc = 0; + size_t len = ps->buffer_size; + do { + rc = pn_message_encode(message, ps->encode_buffer, &len); + if (rc == PN_OVERFLOW) { + _grow_buffer(ps); + len = ps->buffer_size; + } + } while (rc == PN_OVERFLOW); + + pn_link_send(ps->sender, ps->encode_buffer, len); + pn_link_advance(ps->sender); + ++ps->msgs_sent; + // command completes when remote updates the delivery (see PN_DELIVERY) + break; + + case COMMAND_DONE: + break; + } + + pthread_mutex_unlock(&ipc->lock); +} + +/* runs the protocol engine, allowing it to handle TCP socket I/O and timer + * events in the background. +*/ +static void *amqp1_thread(void *arg) +{ + + pn_handler_t *handler = (pn_handler_t *)arg; + protocolState_t *ps = PROTOCOL_STATE(handler); + const configSettings_t *cfg = ps->config; + + // have pn_reactor_process() exit after 5 sec to poll for commands + pn_reactor_set_timeout(ps->reactor, 5000); + pn_reactor_start(ps->reactor); + + while (!ps->stopped) { + // setup a connection: + const char *host = pn_url_get_host(cfg->url); + const char *port = pn_url_get_port(cfg->url); + if (!port) port = "5672"; + +#if PN_VERSION_MAJOR == 0 && PN_VERSION_MINOR >= 13 + ps->conn = pn_reactor_connection_to_host(ps->reactor, + host, + port, + handler); + pn_connection_set_hostname(ps->conn, host); +#else + { + char host_addr[300]; + ps->conn = pn_reactor_connection(ps->reactor, handler); + snprintf(host_addr, sizeof(host_addr), "%s:%s", host, port); + pn_connection_set_hostname(ps->conn, host_addr); + } +#endif + pn_connection_set_container(ps->conn, "rsyslogd-omamqp1"); + +#if PN_VERSION_MAJOR == 0 && PN_VERSION_MINOR >= 10 + // proton version <= 0.9 did not support Cyrus SASL + const char *user = cfg->username + ? (char *)cfg->username + : pn_url_get_username(cfg->url); + if (user) + pn_connection_set_user(ps->conn, user); + + const char *pword = cfg->password + ? (char *) cfg->password + : pn_url_get_password(cfg->url); + if (pword) + pn_connection_set_password(ps->conn, pword); +#endif + pn_connection_open(ps->conn); + pn_session_t *ssn = pn_session(ps->conn); + pn_session_open(ssn); + ps->sender = pn_sender(ssn, (char *)cfg->target); + pn_link_set_snd_settle_mode(ps->sender, PN_SND_UNSETTLED); + char *addr = (char *)ps->config->target; + pn_terminus_set_address(pn_link_target(ps->sender), addr); + pn_terminus_set_address(pn_link_source(ps->sender), addr); + pn_link_open(ps->sender); + + // run the protocol engine until the connection closes or thread is shut down + sbool engine_running = true; + while (engine_running) { + engine_running = pn_reactor_process(ps->reactor); + _poll_command(ps); + } + + _abort_command(ps); // unblock main thread if necessary + + // delay reconnectDelay seconds before re-connecting: + int delay = ps->config->reconnectDelay; + while (delay-- > 0 && !ps->stopped) { + srSleep(1, 0); + _poll_command(ps); + } + } + pn_reactor_stop(ps->reactor); + // stop command is now done: + threadIPC_t *ipc = ps->ipc; + pthread_mutex_lock(&ipc->lock); + ipc->result = RS_RET_OK; + ipc->command = COMMAND_DONE; + pthread_cond_signal(&ipc->condition); + pthread_mutex_unlock(&ipc->lock); + + DBGPRINTF("omamqp1: Protocol thread stopped\n"); + + return 0; +} + + +static rsRetVal _launch_protocol_thread(instanceData *pData) +{ + int rc; + DBGPRINTF("omamqp1: Starting protocol thread\n"); + do { + rc = pthread_create(&pData->thread_id, NULL, amqp1_thread, pData->handler); + if (!rc) { + pData->bThreadRunning = true; + return RS_RET_OK; + } + } while (rc == EAGAIN); + LogError(0, RS_RET_SYS_ERR, "omamqp1: thread create failed: %d", rc); + return RS_RET_SYS_ERR; +} + +static rsRetVal _shutdown_thread(instanceData *pData) +{ + DEFiRet; + + if (pData->bThreadRunning) { + DBGPRINTF("omamqp1: shutting down thread...\n"); + CHKiRet(_issue_command(&pData->ipc, pData->reactor, COMMAND_SHUTDOWN, NULL)); + pthread_join(pData->thread_id, NULL); + pData->bThreadRunning = false; + DBGPRINTF("omamqp1: thread shutdown complete\n"); + } + +finalize_it: + RETiRet; +} + + + +/* vi:set ai: + */ + |