The Sctp_event_subscribe definitions in RHEL5 and RHEL6 are very different.

Recently encountered a problem about SCTP: a product runs on Monta Vista, its kernel version number is 2.6.21, but each time the product is on our red Hat Enterprise Linux 5.5, the error message is as follows:

^?0 2011-08-16 09:11:57.316267 coolnjmcl018 ammserv 26555[26566]. /com/ammssctplib.cc,369 [EAMMS1315] ammssctplib::ammssetsockopt () setsockopt-invalid argument
^?1 2011-08-16 09:11:57.316326 coolnjmcl018 Ammserv 26555[26566]. /com/ammsaccessserver.cc,779 [EAMMS1036] ammsaccessserver::setsocketopts (): Failed to set sctp_events for socket 6

Ammssetsockopt () called the Linux API setsockopt (). Product colleagues told us that they upgraded the libsctp.so, so we copy the MV in the shared Lib to Rhel, the problem remains. Later we thought that the RHEL5.5 kernel was inconsistent with the Monta Vista kernel, so I upgraded the Rhel kernel from 2.6.18-194.el5 to 2.6.18-238.9.1.el5, and the problem still remains. While we were still considering whether to replace our server with Monta Vista, a colleague was http://centos.org/modules/newbb/viewtopic.php?viewmode=threaded& Order=asc&topic_id=18994&forum=37&move=next&topic_time=1236769500 's inspiration, put setsockopt () The last parameter changed from sizeof (events) to 8, unexpectedly succeeded. Events are defined as follows.

Finally, it was found that the definition of struct sctp_event_subscribe in RHEL5 and RHEL6 was completely different. To solve the problem above, only upgrade the operating system to RHEL6.

Definition in RHEL5: http://rhkernel.org/RHEL5+2.6.18-194.el5/include/net/sctp/user.h#L367

/*
 364 * described in section 7.3
 365 * Ancillary Data and   Notification interest Options
 366/
 367str UCT Sctp_event_subscribe {
 368        __u8 sctp_data_io_event;
 369        __u8 sctp_association_event;
 370        __u8 sctp_address_event;
 371        __u8 sctp_send_failure_event;
 372        __u8 sctp_peer_error_event;
 373        __u8 sctp_shutdown_event;
 374        __u8 sctp_partial_delivery_event;
 375        __u8 sctp_adaption_layer_event;
 376};

Definition in RHEL 6: http://rhkernel.org/RHEL6+2.6.32-71.18.2.el6/include/net/sctp/user.h#L406

/*
 403 * described in section 7.3
 404 * Ancillary Data and   Notification interest Options
 405/
 406str UCT Sctp_event_subscribe {
 407        __u8 sctp_data_io_event;
 408        __u8 sctp_association_event;
 409        __u8 sctp_address_event;
 410        __u8 sctp_send_failure_event;
 411        __u8 sctp_peer_error_event;
 412        __u8 sctp_shutdown_event;
 413        __u8 sctp_partial_delivery_event;
 414        __u8 sctp_adaptation_layer_event;
 415        __u8 sctp_authentication_event;
 416};
 417