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git.proxmox.com Git - mirror_frr.git/blob - lib/frr_zmq.c
2 * libzebra ZeroMQ bindings
3 * Copyright (C) 2015 David Lamparter
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the Free
7 * Software Foundation; either version 2 of the License, or (at your option)
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; see the file COPYING; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 DEFINE_MTYPE_STATIC(LIB
, ZEROMQ_CB
, "ZeroMQ callback")
30 /* libzmq's context */
31 void *frrzmq_context
= NULL
;
32 static unsigned frrzmq_initcount
= 0;
34 void frrzmq_init(void)
36 if (frrzmq_initcount
++ == 0) {
37 frrzmq_context
= zmq_ctx_new();
38 zmq_ctx_set(frrzmq_context
, ZMQ_IPV6
, 1);
42 void frrzmq_finish(void)
44 if (--frrzmq_initcount
== 0) {
45 zmq_ctx_term(frrzmq_context
);
46 frrzmq_context
= NULL
;
50 static int frrzmq_read_msg(struct thread
*t
)
52 struct frrzmq_cb
**cbp
= THREAD_ARG(t
);
56 unsigned char read
= 0;
63 if (!cb
|| !cb
->zmqsock
)
67 zmq_pollitem_t polli
= {.socket
= cb
->zmqsock
,
68 .events
= ZMQ_POLLIN
};
69 ret
= zmq_poll(&polli
, 1, 0);
74 if (!(polli
.revents
& ZMQ_POLLIN
))
77 if (cb
->read
.cb_msg
) {
78 cb
->read
.cb_msg(cb
->read
.arg
, cb
->zmqsock
);
81 if (cb
->read
.cancelled
) {
82 frrzmq_check_events(cbp
, &cb
->write
,
84 cb
->read
.thread
= NULL
;
85 if (cb
->write
.cancelled
&& !cb
->write
.thread
)
86 XFREE(MTYPE_ZEROMQ_CB
, cb
);
93 if (zmq_msg_init(&msg
))
96 ret
= zmq_msg_recv(&msg
, cb
->zmqsock
, ZMQ_NOBLOCK
);
106 cb
->read
.cb_part(cb
->read
.arg
, cb
->zmqsock
, &msg
,
108 if (cb
->read
.cancelled
) {
110 frrzmq_check_events(cbp
, &cb
->write
,
112 cb
->read
.thread
= NULL
;
113 if (cb
->write
.cancelled
&& !cb
->write
.thread
)
114 XFREE(MTYPE_ZEROMQ_CB
, cb
);
118 /* cb_part may have read additional parts of the
119 * message; don't use zmq_msg_more here */
120 moresz
= sizeof(more
);
122 ret
= zmq_getsockopt(cb
->zmqsock
, ZMQ_RCVMORE
, &more
,
135 frrzmq_check_events(cbp
, &cb
->write
, ZMQ_POLLOUT
);
137 funcname_thread_add_read_write(
138 THREAD_READ
, t
->master
, frrzmq_read_msg
, cbp
, cb
->fd
,
139 &cb
->read
.thread
, t
->funcname
, t
->schedfrom
, t
->schedfrom_line
);
143 zlog_err("ZeroMQ read error: %s(%d)", strerror(errno
), errno
);
144 if (cb
->read
.cb_error
)
145 cb
->read
.cb_error(cb
->read
.arg
, cb
->zmqsock
);
149 int funcname_frrzmq_thread_add_read(struct thread_master
*master
,
150 void (*msgfunc
)(void *arg
, void *zmqsock
),
151 void (*partfunc
)(void *arg
, void *zmqsock
,
154 void (*errfunc
)(void *arg
, void *zmqsock
),
155 void *arg
, void *zmqsock
,
156 struct frrzmq_cb
**cbp
, debugargdef
)
160 struct frrzmq_cb
*cb
;
164 if (!(msgfunc
|| partfunc
) || (msgfunc
&& partfunc
))
167 if (zmq_getsockopt(zmqsock
, ZMQ_FD
, &fd
, &len
))
169 len
= sizeof(events
);
170 if (zmq_getsockopt(zmqsock
, ZMQ_EVENTS
, &events
, &len
))
176 cb
= XCALLOC(MTYPE_ZEROMQ_CB
, sizeof(struct frrzmq_cb
));
177 cb
->write
.cancelled
= 1;
183 cb
->zmqsock
= zmqsock
;
186 cb
->read
.cb_msg
= msgfunc
;
187 cb
->read
.cb_part
= partfunc
;
188 cb
->read
.cb_error
= errfunc
;
189 cb
->read
.cancelled
= 0;
191 if (events
& ZMQ_POLLIN
) {
192 if (cb
->read
.thread
) {
193 thread_cancel(cb
->read
.thread
);
194 cb
->read
.thread
= NULL
;
196 funcname_thread_add_event(master
, frrzmq_read_msg
, cbp
, fd
,
197 &cb
->read
.thread
, funcname
, schedfrom
,
200 funcname_thread_add_read_write(
201 THREAD_READ
, master
, frrzmq_read_msg
, cbp
, fd
,
202 &cb
->read
.thread
, funcname
, schedfrom
, fromln
);
206 static int frrzmq_write_msg(struct thread
*t
)
208 struct frrzmq_cb
**cbp
= THREAD_ARG(t
);
209 struct frrzmq_cb
*cb
;
210 unsigned char written
= 0;
216 if (!cb
|| !cb
->zmqsock
)
220 zmq_pollitem_t polli
= {.socket
= cb
->zmqsock
,
221 .events
= ZMQ_POLLOUT
};
222 ret
= zmq_poll(&polli
, 1, 0);
227 if (!(polli
.revents
& ZMQ_POLLOUT
))
230 if (cb
->write
.cb_msg
) {
231 cb
->write
.cb_msg(cb
->write
.arg
, cb
->zmqsock
);
234 if (cb
->write
.cancelled
) {
235 frrzmq_check_events(cbp
, &cb
->read
, ZMQ_POLLIN
);
236 cb
->write
.thread
= NULL
;
237 if (cb
->read
.cancelled
&& !cb
->read
.thread
)
238 XFREE(MTYPE_ZEROMQ_CB
, cb
);
246 frrzmq_check_events(cbp
, &cb
->read
, ZMQ_POLLIN
);
248 funcname_thread_add_read_write(THREAD_WRITE
, t
->master
,
249 frrzmq_write_msg
, cbp
, cb
->fd
,
250 &cb
->write
.thread
, t
->funcname
,
251 t
->schedfrom
, t
->schedfrom_line
);
255 zlog_err("ZeroMQ write error: %s(%d)", strerror(errno
), errno
);
256 if (cb
->write
.cb_error
)
257 cb
->write
.cb_error(cb
->write
.arg
, cb
->zmqsock
);
260 int funcname_frrzmq_thread_add_write(struct thread_master
*master
,
261 void (*msgfunc
)(void *arg
, void *zmqsock
),
262 void (*errfunc
)(void *arg
, void *zmqsock
),
263 void *arg
, void *zmqsock
,
264 struct frrzmq_cb
**cbp
, debugargdef
)
268 struct frrzmq_cb
*cb
;
275 if (zmq_getsockopt(zmqsock
, ZMQ_FD
, &fd
, &len
))
277 len
= sizeof(events
);
278 if (zmq_getsockopt(zmqsock
, ZMQ_EVENTS
, &events
, &len
))
284 cb
= XCALLOC(MTYPE_ZEROMQ_CB
, sizeof(struct frrzmq_cb
));
285 cb
->read
.cancelled
= 1;
291 cb
->zmqsock
= zmqsock
;
294 cb
->write
.cb_msg
= msgfunc
;
295 cb
->write
.cb_part
= NULL
;
296 cb
->write
.cb_error
= errfunc
;
297 cb
->write
.cancelled
= 0;
299 if (events
& ZMQ_POLLOUT
) {
300 if (cb
->write
.thread
) {
301 thread_cancel(cb
->write
.thread
);
302 cb
->write
.thread
= NULL
;
304 funcname_thread_add_event(master
, frrzmq_write_msg
, cbp
, fd
,
305 &cb
->write
.thread
, funcname
,
308 funcname_thread_add_read_write(
309 THREAD_WRITE
, master
, frrzmq_write_msg
, cbp
, fd
,
310 &cb
->write
.thread
, funcname
, schedfrom
, fromln
);
314 void frrzmq_thread_cancel(struct frrzmq_cb
**cb
, struct cb_core
*core
)
320 thread_cancel(core
->thread
);
323 if ((*cb
)->read
.cancelled
&& !(*cb
)->read
.thread
324 && (*cb
)->write
.cancelled
&& (*cb
)->write
.thread
)
325 XFREE(MTYPE_ZEROMQ_CB
, *cb
);
328 void frrzmq_check_events(struct frrzmq_cb
**cbp
, struct cb_core
*core
,
331 struct frrzmq_cb
*cb
;
338 if (!cb
|| !cb
->zmqsock
)
341 if (zmq_getsockopt(cb
->zmqsock
, ZMQ_EVENTS
, &events
, &len
))
343 if (events
& event
&& core
->thread
&& !core
->cancelled
) {
344 struct thread_master
*tm
= core
->thread
->master
;
345 thread_cancel(core
->thread
);
347 thread_add_event(tm
, (event
== ZMQ_POLLIN
? frrzmq_read_msg
349 cbp
, cb
->fd
, &core
->thread
);