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00017 #ifdef HAVE_CONFIG_H
00018 # include <dtn-config.h>
00019 #endif
00020
00021 #include <oasys/util/OptParser.h>
00022
00023 #include "ConnectionConvergenceLayer.h"
00024 #include "CLConnection.h"
00025 #include "bundling/BundleDaemon.h"
00026
00027 namespace dtn {
00028
00029
00030 ConnectionConvergenceLayer::LinkParams::LinkParams(bool init_defaults)
00031 : reactive_frag_enabled_(true),
00032 sendbuf_len_(32768),
00033 recvbuf_len_(32768),
00034 data_timeout_(30000),
00035 test_read_delay_(0),
00036 test_write_delay_(0),
00037 test_recv_delay_(0),
00038 test_read_limit_(0),
00039 test_write_limit_(0)
00040 {
00041 (void)init_defaults;
00042 }
00043
00044
00045 ConnectionConvergenceLayer::ConnectionConvergenceLayer(const char* classname,
00046 const char* cl_name)
00047 : ConvergenceLayer(classname, cl_name)
00048 {
00049 }
00050
00051
00052 bool
00053 ConnectionConvergenceLayer::parse_link_params(LinkParams* params,
00054 int argc, const char** argv,
00055 const char** invalidp)
00056 {
00057 oasys::OptParser p;
00058
00059 p.addopt(new oasys::BoolOpt("reactive_frag_enabled",
00060 ¶ms->reactive_frag_enabled_));
00061 p.addopt(new oasys::UIntOpt("sendbuf_len", ¶ms->sendbuf_len_));
00062 p.addopt(new oasys::UIntOpt("recvbuf_len", ¶ms->recvbuf_len_));
00063 p.addopt(new oasys::UIntOpt("data_timeout", ¶ms->data_timeout_));
00064
00065 p.addopt(new oasys::UIntOpt("test_read_delay",
00066 ¶ms->test_read_delay_));
00067 p.addopt(new oasys::UIntOpt("test_write_delay",
00068 ¶ms->test_write_delay_));
00069 p.addopt(new oasys::UIntOpt("test_recv_delay",
00070 ¶ms->test_recv_delay_));
00071
00072 p.addopt(new oasys::UIntOpt("test_read_limit",
00073 ¶ms->test_read_limit_));
00074 p.addopt(new oasys::UIntOpt("test_write_limit",
00075 ¶ms->test_write_limit_));
00076
00077 if (! p.parse(argc, argv, invalidp)) {
00078 return false;
00079 }
00080
00081 if (params->sendbuf_len_ == 0) {
00082 *invalidp = "sendbuf_len must not be zero";
00083 return false;
00084 }
00085
00086 if (params->recvbuf_len_ == 0) {
00087 *invalidp = "recvbuf_len must not be zero";
00088 return false;
00089 }
00090
00091 return true;
00092 }
00093
00094
00095 void
00096 ConnectionConvergenceLayer::dump_link(const LinkRef& link,
00097 oasys::StringBuffer* buf)
00098 {
00099 ASSERT(link != NULL);
00100 ASSERT(!link->isdeleted());
00101 ASSERT(link->cl_info() != NULL);
00102
00103 LinkParams* params = dynamic_cast<LinkParams*>(link->cl_info());
00104 ASSERT(params != NULL);
00105
00106 buf->appendf("reactive_frag_enabled: %u\n", params->reactive_frag_enabled_);
00107 buf->appendf("sendbuf_len: %u\n", params->sendbuf_len_);
00108 buf->appendf("recvbuf_len: %u\n", params->recvbuf_len_);
00109 buf->appendf("data_timeout: %u\n", params->data_timeout_);
00110 buf->appendf("test_read_delay: %u\n", params->test_read_delay_);
00111 buf->appendf("test_write_delay: %u\n", params->test_write_delay_);
00112 buf->appendf("test_recv_delay: %u\n",params->test_recv_delay_);
00113 }
00114
00115
00116 bool
00117 ConnectionConvergenceLayer::init_link(const LinkRef& link,
00118 int argc, const char* argv[])
00119 {
00120 ASSERT(link != NULL);
00121 ASSERT(!link->isdeleted());
00122 ASSERT(link->cl_info() == NULL);
00123
00124 log_debug("adding %s link %s", link->type_str(), link->nexthop());
00125
00126
00127
00128 LinkParams* params = new_link_params();
00129
00130
00131
00132
00133
00134 parse_nexthop(link, params);
00135
00136 const char* invalid;
00137 if (! parse_link_params(params, argc, argv, &invalid)) {
00138 log_err("error parsing link options: invalid option '%s'", invalid);
00139 delete params;
00140 return false;
00141 }
00142
00143 if (! finish_init_link(link, params)) {
00144 log_err("error in finish_init_link");
00145 delete params;
00146 return false;
00147 }
00148
00149 link->set_cl_info(params);
00150
00151 return true;
00152 }
00153
00154
00155 void
00156 ConnectionConvergenceLayer::delete_link(const LinkRef& link)
00157 {
00158 ASSERT(link != NULL);
00159 ASSERT(!link->isdeleted());
00160
00161 log_debug("ConnectionConvergenceLayer::delete_link: "
00162 "deleting link %s", link->name());
00163
00164 if (link->isopen() || link->isopening()) {
00165 log_debug("ConnectionConvergenceLayer::delete_link: "
00166 "link %s open, deleting link state when contact closed",
00167 link->name());
00168 return;
00169 }
00170
00171 ASSERT(link->contact() == NULL);
00172 ASSERT(link->cl_info() != NULL);
00173
00174 delete link->cl_info();
00175 link->set_cl_info(NULL);
00176 }
00177
00178
00179 bool
00180 ConnectionConvergenceLayer::finish_init_link(const LinkRef& link,
00181 LinkParams* params)
00182 {
00183 (void)link;
00184 (void)params;
00185 return true;
00186 }
00187
00188
00189 bool
00190 ConnectionConvergenceLayer::reconfigure_link(const LinkRef& link,
00191 int argc, const char* argv[])
00192 {
00193 ASSERT(link != NULL);
00194 ASSERT(!link->isdeleted());
00195 ASSERT(link->cl_info() != NULL);
00196
00197 LinkParams* params = dynamic_cast<LinkParams*>(link->cl_info());
00198 ASSERT(params != NULL);
00199
00200 const char* invalid;
00201 if (! parse_link_params(params, argc, argv, &invalid)) {
00202 log_err("reconfigure_link: invalid parameter %s", invalid);
00203 return false;
00204 }
00205
00206 if (link->isopen()) {
00207 LinkParams* params = dynamic_cast<LinkParams*>(link->cl_info());
00208 ASSERT(params != NULL);
00209
00210 CLConnection* conn = dynamic_cast<CLConnection*>(link->contact()->cl_info());
00211 ASSERT(conn != NULL);
00212
00213 if ((params->sendbuf_len_ != conn->sendbuf_.size()) &&
00214 (params->sendbuf_len_ >= conn->sendbuf_.fullbytes()))
00215 {
00216 log_info("resizing link *%p send buffer from %zu -> %u",
00217 link.object(), conn->sendbuf_.size(),
00218 params->sendbuf_len_);
00219 conn->sendbuf_.set_size(params->sendbuf_len_);
00220 }
00221
00222 if ((params->recvbuf_len_ != conn->recvbuf_.size()) &&
00223 (params->recvbuf_len_ >= conn->recvbuf_.fullbytes()))
00224 {
00225 log_info("resizing link *%p recv buffer from %zu -> %u",
00226 link.object(), conn->recvbuf_.size(),
00227 params->recvbuf_len_);
00228 conn->recvbuf_.set_size(params->recvbuf_len_);
00229 }
00230 }
00231
00232 return true;
00233 }
00234
00235
00236 bool
00237 ConnectionConvergenceLayer::open_contact(const ContactRef& contact)
00238 {
00239 LinkRef link = contact->link();
00240 ASSERT(link != NULL);
00241 ASSERT(!link->isdeleted());
00242 ASSERT(link->cl_info() != NULL);
00243
00244 log_debug("ConnectionConvergenceLayer::open_contact: "
00245 "opening contact on link *%p", link.object());
00246
00247 LinkParams* params = dynamic_cast<LinkParams*>(link->cl_info());
00248 ASSERT(params != NULL);
00249
00250
00251
00252 CLConnection* conn = new_connection(link, params);
00253 conn->set_contact(contact);
00254 contact->set_cl_info(conn);
00255 conn->start();
00256
00257 return true;
00258 }
00259
00260
00261 bool
00262 ConnectionConvergenceLayer::close_contact(const ContactRef& contact)
00263 {
00264 log_info("close_contact *%p", contact.object());
00265
00266 const LinkRef& link = contact->link();
00267 ASSERT(link != NULL);
00268
00269 CLConnection* conn = dynamic_cast<CLConnection*>(contact->cl_info());
00270 ASSERT(conn != NULL);
00271
00272
00273
00274 if (! conn->contact_broken_) {
00275 conn->cmdqueue_.push_back(
00276 CLConnection::CLMsg(CLConnection::CLMSG_BREAK_CONTACT));
00277 }
00278
00279 while (!conn->is_stopped()) {
00280 log_debug("waiting for connection thread to stop...");
00281 usleep(100000);
00282 oasys::Thread::yield();
00283 }
00284
00285
00286
00287 LinkParams* params = dynamic_cast<LinkParams*>(link->cl_info());
00288 ASSERT(params != NULL);
00289
00290 while (! conn->inflight_.empty()) {
00291 CLConnection::InFlightBundle* inflight = conn->inflight_.front();
00292 u_int32_t sent_bytes = inflight->sent_data_.num_contiguous();
00293 u_int32_t acked_bytes = inflight->ack_data_.num_contiguous();
00294
00295 if ((! params->reactive_frag_enabled_) ||
00296 (sent_bytes == 0) ||
00297 (link->is_reliable() && acked_bytes == 0))
00298 {
00299
00300
00301
00302 if (! link->del_from_inflight(inflight->bundle_,
00303 inflight->total_length_) ||
00304 ! link->add_to_queue(inflight->bundle_,
00305 inflight->total_length_))
00306 {
00307 log_warn("inflight queue mismatch for bundle %d",
00308 inflight->bundle_->bundleid());
00309 }
00310
00311 } else {
00312
00313
00314
00315 if (! inflight->transmit_event_posted_) {
00316 BundleDaemon::post(
00317 new BundleTransmittedEvent(inflight->bundle_.object(),
00318 contact, link,
00319 sent_bytes, acked_bytes));
00320 }
00321 }
00322
00323 conn->inflight_.pop_front();
00324 delete inflight;
00325 }
00326
00327
00328
00329
00330 if (! conn->incoming_.empty()) {
00331 CLConnection::IncomingBundle* incoming = conn->incoming_.back();
00332 if (!incoming->rcvd_data_.empty())
00333 {
00334 size_t rcvd_len = incoming->rcvd_data_.last() + 1;
00335
00336 size_t header_block_length =
00337 BundleProtocol::payload_offset(&incoming->bundle_->recv_blocks());
00338
00339 if ((incoming->total_length_ == 0) &&
00340 params->reactive_frag_enabled_ &&
00341 (rcvd_len > header_block_length))
00342 {
00343 log_debug("partial arrival of bundle: "
00344 "got %zu bytes [hdr %zu payload %zu]",
00345 rcvd_len, header_block_length,
00346 incoming->bundle_->payload().length());
00347
00348 BundleDaemon::post(
00349 new BundleReceivedEvent(incoming->bundle_.object(),
00350 EVENTSRC_PEER, rcvd_len,
00351 contact->link()->remote_eid(),
00352 contact->link().object()));
00353 }
00354 }
00355 }
00356
00357
00358 while (! conn->incoming_.empty()) {
00359 CLConnection::IncomingBundle* incoming = conn->incoming_.back();
00360 conn->incoming_.pop_back();
00361 delete incoming;
00362 }
00363
00364
00365 CLConnection::CLMsg msg;
00366 while (conn->cmdqueue_.try_pop(&msg)) {}
00367
00368 delete conn;
00369
00370 contact->set_cl_info(NULL);
00371
00372 if (link->isdeleted()) {
00373 ASSERT(link->cl_info() != NULL);
00374 delete link->cl_info();
00375 link->set_cl_info(NULL);
00376 }
00377
00378 return true;
00379 }
00380
00381
00382 void
00383 ConnectionConvergenceLayer::bundle_queued(const LinkRef& link,
00384 const BundleRef& bundle)
00385 {
00386 (void)bundle;
00387 log_debug("ConnectionConvergenceLayer::bundle_queued: "
00388 "queued *%p on *%p", bundle.object(), link.object());
00389
00390 if (! link->isopen()) {
00391 return;
00392 }
00393
00394 ASSERT(!link->isdeleted());
00395
00396 const ContactRef& contact = link->contact();
00397 ASSERT(contact != NULL);
00398
00399 CLConnection* conn = dynamic_cast<CLConnection*>(contact->cl_info());
00400 ASSERT(conn != NULL);
00401
00402
00403
00404
00405
00406
00407
00408 conn->cmdqueue_.push_back(
00409 CLConnection::CLMsg(CLConnection::CLMSG_BUNDLES_QUEUED));
00410 }
00411
00412
00413 void
00414 ConnectionConvergenceLayer::cancel_bundle(const LinkRef& link,
00415 const BundleRef& bundle)
00416 {
00417 ASSERT(! link->isdeleted());
00418
00419
00420
00421 if (! bundle->is_queued_on(link->inflight())) {
00422 log_warn("cancel_bundle *%p not on link %s inflight queue",
00423 bundle.object(), link->name());
00424 return;
00425 }
00426
00427 if (!link->isopen()) {
00428
00429
00430
00431
00432
00433
00434
00435
00436
00437
00438
00439 log_warn("cancel_bundle *%p but link *%p isn't open!!",
00440 bundle.object(), link.object());
00441 BundleDaemon::post(new BundleSendCancelledEvent(bundle.object(), link));
00442 return;
00443 }
00444
00445 const ContactRef& contact = link->contact();
00446 CLConnection* conn = dynamic_cast<CLConnection*>(contact->cl_info());
00447 ASSERT(conn != NULL);
00448
00449 ASSERT(contact->link() == link);
00450 log_debug("ConnectionConvergenceLayer::cancel_bundle: "
00451 "cancelling *%p on *%p", bundle.object(), link.object());
00452
00453 conn->cmdqueue_.push_back(
00454 CLConnection::CLMsg(CLConnection::CLMSG_CANCEL_BUNDLE, bundle));
00455 }
00456
00457 }