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diff --git a/trunk/ACE/performance-tests/SCTP/README.SCTP_in_ACE b/trunk/ACE/performance-tests/SCTP/README.SCTP_in_ACE new file mode 100644 index 00000000000..b51cd6b3fe6 --- /dev/null +++ b/trunk/ACE/performance-tests/SCTP/README.SCTP_in_ACE @@ -0,0 +1,269 @@ +Release 1.1 - June 2003 + +Overview of SCTP sockets +------------------------ + +In order to support multiple implementations of SCTP, we had to standardize +on a set of semantics. + +The IETF sockets draft states that service type SOCK_SEQPACKET indicates a UDP +style socket (i.e. connection-less), while service type SOCK_STREAM indicates +a TCP style socket. However, this conflicts with the POSIX definition for +SOCK_SEQPACKET as connection-oriented. + +In ACE we choose to support the standard POSIX definition. In doing so, certain +socket semantics will be guaranteed regardless of implementation. + + [1] SOCK_SEQPACKET sockets will always be message-based, + connection-oriented, and reliable. + + [2] SOCK_STREAM sockets will be message-based or byte-stream based, + connection-oriented, and reliable. + + +SCTP Features Accessible Within ACE +----------------------------------- + + * SOCK_STREAM (byte stream oriented or msg oriented) data transport service + + * SOCK_SEQPACKET (message oriented) data transport service (this is + the service used by TAO's SCIOP pluggable protocol) + + * Explicit control of binding network interfaces (all, one, or any + subset) to server-side passive- and active- mode sockets on + multi-homed machines. (for SOCK_SEQPACKET service only. The + SOCK_STREAM service may only bind one or all interfaces because we + avoided changing the interface of ACE_SOCK_Acceptor.) + + * Setting and getting of all parameters exposed by SCTP + (e.g. retransmission timeout (RTO)) via ACE_SOCK::set_option(...) + and ACE_SOCK::get_option(...) for both SOCK_STREAM and + SOCK_SEQPACKET sockets. You must set the socket level appropriately. + + * Multiplexing of lightweight "SCTP Streams" (over the SOCK_STREAM + and SOCK_SEQPACKET services) via ACE_SOCK::set_option(...) + + * Network path multiplexing (provided opaquely by the protocol---no + explicit support required in ACE other than the ability to + configure various parameters and the set of interfaces as described + above) + + +Supported SCTP Implementations +------------------------------ + + * OpenSS7's Linux Implementation (Berkeley UNIX Network API) + Linux 2.4.18 patch available at: http://www.openss7.org/linux-sctp-0.2.14.tgz + (as of April 2003) + + * The LKSCTP Linux Kernel Implementation (IETF Sockets Draft API compliant) + Available in the Linux 2.5 kernels (http://www.kernel.org/) + Tools/Libs available at http://lksctp.sourceforge.net/ + (All socket interfaces are message-based -- please see README.LKSCTP) + + +BUGS +---- + + * OpenSS7 BUGS + + - protocol crashes when transmitting message sizes greater than + PATH MTU in the presence of network failures (message size + includes SCTP and IP headers and data.) + + * LKSCTP BUGS + + - certain combinations of SCTP parameters will cause a kernel panic + (ie. setting rto_initial, rto_max, or rto_min to 0) + + +TO-DO +---- + + * Provide explicit control of binding network interfaces to + client-side active-mode sockets on multi-homed machines. Current + implementation supports all interfaces but not restriction to one + or to an arbitrary subset. (This will be done for SOCK_SEQPACKET + service only. We want to avoid changing the existing interfaces for + the SOCK_STREAM service). + + * Integrate management and use of "SCTP Streams" into the + ACE_SOCK_SEQPACK_* wrapper-facade. (currently they can only be + accessed indirectly through ACE_SOCK::set_option(...)) + + * Support SOCK_RDM service (connection-less) within ACE for OpenSS7. + + * Convert ATL's histogram utility (located under + performance-tests/SCTP) into a ACE utility and integrate with other + ACE provided statistics classes. + + * Support Draft API msg notifications via sendmsg() and recvmsg(). + + +USAGE +----- + + SOCK_STREAM - Use the ACE_SOCK_Connector, ACE_SOCK_Stream and + ACE_SOCK_Acceptor classes. In ACE_SOCK_Connector pass + the value IPPROTO_SCTP for the protocol parameter in + either the constructor or the connect(...) method + as shown in SOCK_STREAM_clt.cpp. In ACE_SOCK_Acceptor + pass the value IPPROTO_SCTP for the protocol parameter + in either the constructor or the open(...) method + as shown in SOCK_STREAM_srv.cpp. + + You must include the file sctp.h in order for + IPPROTO_SCTP to be defined. This file should be under + /usr/include/netinet + + Aside from these changes, the classes can be used as + they are under TCP (the protocol they use by + default). Be cautious to use SCTP protocol options when + setting socket options on SCTP sockets (e.g., use + SCTP_NODELAY, not TCP_NODELAY, to disable Nagle's + algorithm on an SCTP socket.) + + SOCK_SEQPACKET - Use the ACE_SOCK_SEQPACK_Connector, + ACE_SOCK_SEQPACK_Association, and + ACE_SOCK_SEQPACK_Acceptor classes, which parallel + the familiar ACE_SOCK_Connector, ACE_SOCK_Stream, + and ACE_SOCK_Acceptor classes, respectively. Please + see SOCK_SEQPACK_clt.cpp and SOCK_SEQPACK_srv.cpp for + more details. + + In the special case where you want to specify a set + of interfaces---other than one or all + interfaces---for an ACE_SOCK_SEQPACK_Acceptor, use + an ACE_Multihomed_INET_Addr in place of the familiar + ACE_INET_Addr. (See SOCK_SEQPACK_srv.cpp for an + example.) + + SCTP associations may have more than one local and + more than one remote address bound to them. + Accordingly, ACE_SOCK_SEQPACK_Association provides + methods get_local_addrs(...) and + get_remote_addrs(...). These methods return the list + of local and remote addresses bound to an active + mode SCTP socket. Alternately, the familiar + ACE_SOCK::get_local_addr(...) and + ACE_SOCK::get_remote_addr(...) methods will work + properly with an active mode SCTP socket, but each + will only return a single address. These functions + are only NOT available on ACE_SOCK_SEQPACK_Acceptor + even though that is an SCTP socket as well. This is + because the functions getpeername() and + getsockname() called on a passive SCTP acceptor + socket returns the same values as a TCP socket. As + such, the current ACE methods get_local_addr() and + get_remote_addr() defined in ACE_SOCK are sufficient. + + +DESIGN +------ + +SCTP supports two types of network service: SOCK_STREAM and +SOCK_SEQPACKET. To integrate SCTP's SOCK_STREAM service into ACE we +had to make a small modification to the current SOCK_STREAM wrapper +facade. We had to add a protocol parameter to one constructor and one +connect method of the ACE_SOCK_Connector class. After this +modification the ACE SOCK_STREAM wrapper facade worked properly over +both TCP and SCTP. + +To integrate SCTP's SOCK_SEQPACKET service into ACE we had to create a +new wrapper facade, which we refer to as SOCK_SEQPACK. We closely +emulated the current SOCK_STREAM wrapper facade to develop our new +SOCK_SEQPACK wrapper facade. SOCK_SEQPACK_wrapper_facade.jpg depicts +the classes that implement this new wrapper facade. Also indicated are +those methods that have a substantial change from their SOCK_STREAM +wrapper façade counterparts. Not depicted in the figure but noteworthy +is the removal of the QoS enabled constructor and accept method that +were imported to SOCK_SEQPACK_Acceptor from SOCK_Acceptor and the +removal of the QoS enabled constructor and connect method that were +imported into SOCK_SEQPACK_Connector from SOCK_Connector. SOCK_SEQPACK +association provides two methods to get the list of secondary +addresses associated with the local and remote socket (explained in +more detail in the usage section above). + + +To enable the user to fully exploit the network path multiplexing +features of SCTP we created a new subclass of ACE_INET_Addr called +ACE_INET_Multihomed_Addr. This class enables applications to specify +restricted subsets of network interfaces for inclusion on SCTP +associations on the client and server side. Multihomed_INET_Addr +provides a subset of the ACE_INET_Addr API with the addition of +optional parameters for lists of secondary addresses or hostnames. If +just a primary address or hostname is provided +ACE_Multihomed_INET_Addr behaves as an ACE_INET_Addr (in fact it just +populates the base ACE_INET_Addr) This is also depicted in +SOCK_SEQPACK_wrapper_facade.jpg. Multihomed_INET_Addr is only used by +the SOCK_SEQPACK wrapper facade. + + +All SCTP socket options can be read and written from the current +socket options methods provided by ACE_SOCK. + +Finally, our SOCK_SEQPACK wrapper facade does not yet support SCTP +stream multiplexing. + +Here are the files under $(ACE_ROOT) that were either modified or +added. NO files were removed. + +$(ACE_ROOT)/ace/ace_dll.dsp MODIFIED +$(ACE_ROOT)/ace/OS.h MODIFIED +$(ACE_ROOT)/ace/Makefile.ace MODIFIED +$(ACE_ROOT)/ace/SOCK_Connector.h MODIFIED +$(ACE_ROOT)/ace/SOCK_Connector.cpp MODIFIED + +$(ACE_ROOT)/ace/SOCK_SEQPACK_Acceptor.h ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Acceptor.i ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Acceptor.cpp ADDED + +$(ACE_ROOT)/ace/SOCK_SEQPACK_Connector.h ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Connector.i ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Connector.cpp ADDED + +$(ACE_ROOT)/ace/SOCK_SEQPACK_Association.h ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Association.i ADDED +$(ACE_ROOT)/ace/SOCK_SEQPACK_Association.cpp ADDED + +$(ACE_ROOT)/ace/Multihomed_INET_Addr.h ADDED +$(ACE_ROOT)/ace/Multihomed_INET_Addr.i ADDED +$(ACE_ROOT)/ace/Multihomed_INET_Addr.cpp ADDED + +$(ACE_ROOT)/bin/PerlACE/Process_Unix.pm MODIFIED +$(ACE_ROOT)/bin/PerlACE/Process_Win32.pm MODIFIED + +$(ACE_ROOT)/include/makeinclude/wrapper_macros.GNU MODIFIED +$(ACE_ROOT)/include/makeinclude/platform_linux.GNU MODIFIED + +$(ACE_ROOT)/tests/Makefile MODIFIED +$(ACE_ROOT)/tests/Multihomed_INET_Addr_Test.cpp ADDED +$(ACE_ROOT)/tests/Multihomed_INET_Addr_Test.dsp ADDED +$(ACE_ROOT)/tests/SOCK_SEQPACK_Association_Test.cpp ADDED +$(ACE_ROOT)/tests/SOCK_SEQPACK_Association_Test.dsp ADDED +$(ACE_ROOT)/tests/run_test.lst MODIFIED +$(ACE_ROOT)/tests/run_tests.bat MODIFIED +$(ACE_ROOT)/tests/tests.dsw MODIFIED + +$(ACE_ROOT)/performance-tests/SCTP/THANKS ADDED +$(ACE_ROOT)/performance-tests/SCTP/README ADDED +$(ACE_ROOT)/performance-tests/SCTP/README.SCTP ADDED +$(ACE_ROOT)/performance-tests/SCTP/README.SCTP_in_ACE ADDED +$(ACE_ROOT)/performance-tests/SCTP/README.SCTP_PERF_TEST ADDED +$(ACE_ROOT)/performance-tests/SCTP/README.OpenSS7 ADDED +$(ACE_ROOT)/performance-tests/SCTP/README.LKSCTP ADDED + +$(ACE_ROOT)/performance-tests/SCTP/Makefile ADDED +$(ACE_ROOT)/performance-tests/SCTP/run_spectrum.pl ADDED + +$(ACE_ROOT)/performance-tests/SCTP/hist.h ADDED +$(ACE_ROOT)/performance-tests/SCTP/hist.cpp ADDED + +$(ACE_ROOT)/performance-tests/SCTP/Options_Manager.h ADDED +$(ACE_ROOT)/performance-tests/SCTP/Options_Manager.cpp ADDED + +$(ACE_ROOT)/performance-tests/SCTP/SOCK_STREAM_clt.cpp ADDED +$(ACE_ROOT)/performance-tests/SCTP/SOCK_STREAM_srv.cpp ADDED + +$(ACE_ROOT)/performance-tests/SCTP/SOCK_SEQPACK_clt.cpp ADDED +$(ACE_ROOT)/performance-tests/SCTP/SOCK_SEQPACK_srv.cpp ADDED |