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gitosis at osmocom.org gitosis at osmocom.orgThis is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "MNCC <-> SIP bridge". The branch, master has been updated via 37c2254f5dd0f29bf1073ee3d983eb270f4f8429 (commit) from 49880ddf740a7af47a1247dbff9acb34087b6afc (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- http://cgit.osmocom.org/osmo-sip-connector/commit/?id=37c2254f5dd0f29bf1073ee3d983eb270f4f8429 commit 37c2254f5dd0f29bf1073ee3d983eb270f4f8429 Author: Holger Hans Peter Freyther <holger at moiji-mobile.com> Date: Tue Mar 7 07:59:00 2017 +0100 evpoll: Add workaround for usage of IP_RECVERR in sofia-sip We are using glib to benefit from the sofia-sip-glib eventloop integration and set a poll func (evpoll) to be called by glib to integrate with the rest of libosmocore. Sofia-sip will use IP_RECVERR to enable error reporting on the socket and then sets SU_WAIT_ERR (mapped to POLLERR if not using kqueue) in the internal events flag of the socket. This will be registered with a su_wait (mapped to struct pollfd) and then glib will be called with g_source_add_poll. At this point the the fd->events will still have the POLLERR bit set. Before glib is calling its internal poll routine or our one it will copy all registered fd into an array and mask the events flags: /* In direct contradiction to the Unix98 spec, IRIX runs into * difficulty if you pass in POLLERR, POLLHUP or POLLNVAL * flags in the events field of the pollfd while it should * just ignoring them. So we mask them out here. */ events = pollrec->fd->events & ~(G_IO_ERR|G_IO_HUP|G_IO_NVAL); This leads to the POLLERR flag never been set in the revents of the struct poll_fd and as such we never put them in the exceptionset and as such: static int tport_base_wakeup(tport_t *self, int events) { int error = 0; if (events & SU_WAIT_ERR) error = tport_error_event(self); tport_base_wakeup will never call tport_error_event. And the error will be stuck in the socket data forever and recvmsg will return a zero length packet. And this will repeat until the end of time. As a first hack I mapped SU_WAIT_ERR to POLLPRI but when using select the Linux kernel will not put the socket error into the except queue unless the sockopt SOCK_SELECT_ERR_QUEUE is used. One option is to use poll and then map the select requirements to poll. Right now I just signal POLLERR as well to trigger tport_error_event. This will result in extra syscalls for each received UDP message right now. Change-Id: I5bec4a7b70f421ab670e649e5bc1ea6faf59707c ----------------------------------------------------------------------- Summary of changes: src/evpoll.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) hooks/post-receive -- MNCC <-> SIP bridge