2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
19 #include <sys/socket.h>
20 #include <sys/types.h>
26 #include <sys/ioctl.h>
29 #include <sys/prctl.h>
35 #include <memif_private.h>
37 /* sends msg to socket */
39 memif_msg_send (int fd, memif_msg_t * msg, int afd)
41 struct msghdr mh = { 0 };
43 char ctl[CMSG_SPACE (sizeof (int))];
44 int rv, err = MEMIF_ERR_SUCCESS; /* 0 */
46 iov[0].iov_base = (void *) msg;
47 iov[0].iov_len = sizeof (memif_msg_t);
54 memset (&ctl, 0, sizeof (ctl));
56 mh.msg_controllen = sizeof (ctl);
57 cmsg = CMSG_FIRSTHDR (&mh);
58 cmsg->cmsg_len = CMSG_LEN (sizeof (int));
59 cmsg->cmsg_level = SOL_SOCKET;
60 cmsg->cmsg_type = SCM_RIGHTS;
61 memcpy (CMSG_DATA (cmsg), &afd, sizeof (int));
63 rv = sendmsg (fd, &mh, 0);
65 err = memif_syscall_error_handler (errno);
66 DBG ("Message type %u sent", msg->type);
70 /* response from memif master - master is ready to handle next message */
72 memif_msg_enq_ack (memif_connection_t * c)
74 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
75 memif_msg_queue_elt_t *e =
76 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
78 return memif_syscall_error_handler (errno);
80 memset (&e->msg, 0, sizeof (e->msg));
81 e->msg.type = MEMIF_MSG_TYPE_ACK;
85 if (c->msg_queue == NULL)
88 return MEMIF_ERR_SUCCESS; /* 0 */
91 memif_msg_queue_elt_t *cur = c->msg_queue;
92 while (cur->next != NULL)
98 return MEMIF_ERR_SUCCESS; /* 0 */
102 memif_msg_send_hello (libmemif_main_t * lm, int fd)
104 memif_msg_t msg = { 0 };
105 memif_msg_hello_t *h = &msg.hello;
106 msg.type = MEMIF_MSG_TYPE_HELLO;
107 h->min_version = MEMIF_VERSION;
108 h->max_version = MEMIF_VERSION;
109 h->max_s2m_ring = MEMIF_MAX_S2M_RING;
110 h->max_m2s_ring = MEMIF_MAX_M2S_RING;
111 h->max_region = MEMIF_MAX_REGION;
112 h->max_log2_ring_size = MEMIF_MAX_LOG2_RING_SIZE;
114 strncpy ((char *) h->name, (char *) lm->app_name,
115 strlen ((char *) lm->app_name));
117 /* msg hello is not enqueued but sent directly,
118 because it is the first msg to be sent */
119 return memif_msg_send (fd, &msg, -1);
122 /* send id and secret (optional) for interface identification */
124 memif_msg_enq_init (memif_connection_t * c)
126 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
127 memif_msg_queue_elt_t *e =
128 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
130 return memif_syscall_error_handler (errno);
131 memset (e, 0, sizeof (memif_msg_queue_elt_t));
133 memset (&e->msg, 0, sizeof (e->msg));
134 memif_msg_init_t *i = &e->msg.init;
136 e->msg.type = MEMIF_MSG_TYPE_INIT;
138 i->version = MEMIF_VERSION;
139 i->id = c->args.interface_id;
140 i->mode = c->args.mode;
142 strncpy ((char *) i->name, (char *) lm->app_name,
143 strlen ((char *) lm->app_name));
144 if (strlen ((char *) c->args.secret) > 0)
145 strncpy ((char *) i->secret, (char *) c->args.secret, sizeof (i->secret));
148 if (c->msg_queue == NULL)
151 return MEMIF_ERR_SUCCESS; /* 0 */
154 memif_msg_queue_elt_t *cur = c->msg_queue;
155 while (cur->next != NULL)
161 return MEMIF_ERR_SUCCESS; /* 0 */
164 /* send information about region specified by region_index */
166 memif_msg_enq_add_region (memif_connection_t * c, uint8_t region_index)
168 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
169 memif_region_t *mr = &c->regions[region_index];
171 memif_msg_queue_elt_t *e =
172 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
174 return memif_syscall_error_handler (errno);
176 memset (&e->msg, 0, sizeof (e->msg));
177 memif_msg_add_region_t *ar = &e->msg.add_region;
179 e->msg.type = MEMIF_MSG_TYPE_ADD_REGION;
181 ar->index = region_index;
182 ar->size = mr->region_size;
185 if (c->msg_queue == NULL)
188 return MEMIF_ERR_SUCCESS; /* 0 */
191 memif_msg_queue_elt_t *cur = c->msg_queue;
192 while (cur->next != NULL)
198 return MEMIF_ERR_SUCCESS; /* 0 */
201 /* send information about ring specified by direction (S2M | M2S) and index */
203 memif_msg_enq_add_ring (memif_connection_t * c, uint8_t index, uint8_t dir)
205 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
206 memif_msg_queue_elt_t *e =
207 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
209 return memif_syscall_error_handler (errno);
211 memset (&e->msg, 0, sizeof (e->msg));
212 memif_msg_add_ring_t *ar = &e->msg.add_ring;
214 e->msg.type = MEMIF_MSG_TYPE_ADD_RING;
216 /* TODO: support multiple rings */
218 if (dir == MEMIF_RING_M2S)
219 mq = &c->rx_queues[index];
221 mq = &c->tx_queues[index];
225 ar->offset = mq->offset;
226 ar->region = mq->region;
227 ar->log2_ring_size = mq->log2_ring_size;
228 ar->flags = (dir == MEMIF_RING_S2M) ? MEMIF_MSG_ADD_RING_FLAG_S2M : 0;
229 ar->private_hdr_size = 0;
232 if (c->msg_queue == NULL)
235 return MEMIF_ERR_SUCCESS; /* 0 */
238 memif_msg_queue_elt_t *cur = c->msg_queue;
239 while (cur->next != NULL)
245 return MEMIF_ERR_SUCCESS; /* 0 */
248 /* used as connection request from slave */
250 memif_msg_enq_connect (memif_connection_t * c)
252 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
253 memif_msg_queue_elt_t *e =
254 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
256 return memif_syscall_error_handler (errno);
258 memset (&e->msg, 0, sizeof (e->msg));
259 memif_msg_connect_t *cm = &e->msg.connect;
261 e->msg.type = MEMIF_MSG_TYPE_CONNECT;
263 strncpy ((char *) cm->if_name, (char *) c->args.interface_name,
264 strlen ((char *) c->args.interface_name));
267 if (c->msg_queue == NULL)
270 return MEMIF_ERR_SUCCESS; /* 0 */
273 memif_msg_queue_elt_t *cur = c->msg_queue;
274 while (cur->next != NULL)
280 return MEMIF_ERR_SUCCESS; /* 0 */
283 /* used as confirmation of connection by master */
285 memif_msg_enq_connected (memif_connection_t * c)
287 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
288 memif_msg_queue_elt_t *e =
289 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
291 return memif_syscall_error_handler (errno);
293 memset (&e->msg, 0, sizeof (e->msg));
294 memif_msg_connected_t *cm = &e->msg.connected;
296 e->msg.type = MEMIF_MSG_TYPE_CONNECTED;
298 strncpy ((char *) cm->if_name, (char *) c->args.interface_name,
299 strlen ((char *) c->args.interface_name));
302 if (c->msg_queue == NULL)
305 return MEMIF_ERR_SUCCESS; /* 0 */
308 memif_msg_queue_elt_t *cur = c->msg_queue;
309 while (cur->next != NULL)
315 return MEMIF_ERR_SUCCESS; /* 0 */
318 /* immediately send disconnect msg */
319 /* specifie protocol for disconnect msg err_code
320 so that it will be compatible with VPP? (header/doc) */
322 memif_msg_send_disconnect (int fd, uint8_t * err_string, uint32_t err_code)
324 memif_msg_t msg = { 0 };
325 memif_msg_disconnect_t *d = &msg.disconnect;
327 msg.type = MEMIF_MSG_TYPE_DISCONNECT;
329 uint16_t l = strlen ((char *) err_string);
332 DBG ("Disconnect string too long. Sending first 96 characters.");
335 strncpy ((char *) d->string, (char *) err_string, l);
337 return memif_msg_send (fd, &msg, -1);
341 memif_msg_receive_hello (memif_connection_t * c, memif_msg_t * msg)
343 memif_msg_hello_t *h = &msg->hello;
345 if (msg->hello.min_version > MEMIF_VERSION ||
346 msg->hello.max_version < MEMIF_VERSION)
348 DBG ("incompatible protocol version");
349 return MEMIF_ERR_PROTO;
352 c->run_args.num_s2m_rings = memif_min (h->max_s2m_ring + 1,
353 c->args.num_s2m_rings);
354 c->run_args.num_m2s_rings = memif_min (h->max_m2s_ring + 1,
355 c->args.num_m2s_rings);
356 c->run_args.log2_ring_size = memif_min (h->max_log2_ring_size,
357 c->args.log2_ring_size);
358 c->run_args.buffer_size = c->args.buffer_size;
359 strncpy ((char *) c->remote_name, (char *) h->name,
360 strlen ((char *) h->name));
362 return MEMIF_ERR_SUCCESS; /* 0 */
365 /* handle interface identification (id, secret (optional)) */
367 memif_msg_receive_init (memif_socket_t * ms, int fd, memif_msg_t * msg)
369 memif_msg_init_t *i = &msg->init;
370 memif_list_elt_t *elt = NULL;
371 memif_list_elt_t elt2;
372 memif_connection_t *c = NULL;
373 libmemif_main_t *lm = get_libmemif_main (ms);
374 uint8_t err_string[96];
375 memset (err_string, 0, sizeof (char) * 96);
376 int err = MEMIF_ERR_SUCCESS; /* 0 */
378 if (i->version != MEMIF_VERSION)
380 DBG ("MEMIF_VER_ERR");
381 strncpy ((char *) err_string, MEMIF_VER_ERR, strlen (MEMIF_VER_ERR));
382 err = MEMIF_ERR_PROTO;
386 get_list_elt (&elt, ms->interface_list, ms->interface_list_len, i->id);
389 DBG ("MEMIF_ID_ERR");
390 strncpy ((char *) err_string, MEMIF_ID_ERR, strlen (MEMIF_ID_ERR));
395 c = (memif_connection_t *) elt->data_struct;
397 if (!(c->args.is_master))
399 DBG ("MEMIF_SLAVE_ERR");
400 strncpy ((char *) err_string, MEMIF_SLAVE_ERR,
401 strlen (MEMIF_SLAVE_ERR));
402 err = MEMIF_ERR_ACCSLAVE;
407 DBG ("MEMIF_CONN_ERR");
408 strncpy ((char *) err_string, MEMIF_CONN_ERR, strlen (MEMIF_CONN_ERR));
409 err = MEMIF_ERR_ALRCONN;
415 if (i->mode != c->args.mode)
417 DBG ("MEMIF_MODE_ERR");
418 strncpy ((char *) err_string, MEMIF_MODE_ERR, strlen (MEMIF_MODE_ERR));
419 err = MEMIF_ERR_MODE;
423 strncpy ((char *) c->remote_name, (char *) i->name,
424 strlen ((char *) i->name));
426 if (strlen ((char *) c->args.secret) > 0)
429 if (strlen ((char *) i->secret) > 0)
431 if (strlen ((char *) c->args.secret) != strlen ((char *) i->secret))
433 DBG ("MEMIF_SECRET_ERR");
434 strncpy ((char *) err_string,
435 MEMIF_SECRET_ERR, strlen (MEMIF_SECRET_ERR));
436 err = MEMIF_ERR_SECRET;
439 r = strncmp ((char *) i->secret, (char *) c->args.secret,
440 strlen ((char *) c->args.secret));
443 DBG ("MEMIF_SECRET_ERR");
444 strncpy ((char *) err_string,
445 MEMIF_SECRET_ERR, strlen (MEMIF_SECRET_ERR));
446 err = MEMIF_ERR_SECRET;
452 DBG ("MEMIF_NOSECRET_ERR");
453 strncpy ((char *) err_string,
454 MEMIF_NOSECRET_ERR, strlen (MEMIF_NOSECRET_ERR));
455 err = MEMIF_ERR_NOSECRET;
460 c->read_fn = memif_conn_fd_read_ready;
461 c->write_fn = memif_conn_fd_write_ready;
462 c->error_fn = memif_conn_fd_error;
465 elt2.data_struct = c;
467 add_list_elt (lm, &elt2, &lm->control_list, &lm->control_list_len);
468 free_list_elt (lm->pending_list, lm->pending_list_len, fd);
473 memif_msg_send_disconnect (fd, err_string, 0);
474 lm->control_fd_update (fd, MEMIF_FD_EVENT_DEL, lm->private_ctx);
475 free_list_elt (lm->pending_list, lm->pending_list_len, fd);
481 /* receive region information and add new region to connection (if possible) */
483 memif_msg_receive_add_region (memif_connection_t * c, memif_msg_t * msg,
486 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
488 memif_msg_add_region_t *ar = &msg->add_region;
491 return MEMIF_ERR_NO_SHMFD;
493 if (ar->index > MEMIF_MAX_REGION)
494 return MEMIF_ERR_MAXREG;
497 (memif_region_t *) lm->realloc (c->regions,
498 sizeof (memif_region_t) *
501 return memif_syscall_error_handler (errno);
502 memset (mr + ar->index, 0, sizeof (memif_region_t));
504 c->regions[ar->index].fd = fd;
505 c->regions[ar->index].region_size = ar->size;
506 c->regions[ar->index].addr = NULL;
508 /* region 0 is never external */
509 if (lm->get_external_region_addr && (ar->index != 0))
510 c->regions[ar->index].is_external = 1;
512 return MEMIF_ERR_SUCCESS; /* 0 */
515 /* receive ring information and add new ring to connection queue
516 (based on direction S2M | M2S) */
518 memif_msg_receive_add_ring (memif_connection_t * c, memif_msg_t * msg, int fd)
520 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
522 memif_msg_add_ring_t *ar = &msg->add_ring;
527 return MEMIF_ERR_NO_INTFD;
529 if (ar->private_hdr_size != 0)
530 return MEMIF_ERR_PRIVHDR;
532 if (ar->flags & MEMIF_MSG_ADD_RING_FLAG_S2M)
534 if (ar->index > MEMIF_MAX_S2M_RING)
535 return MEMIF_ERR_MAXRING;
536 if (ar->index >= c->args.num_s2m_rings)
537 return MEMIF_ERR_MAXRING;
540 (memif_queue_t *) lm->realloc (c->rx_queues,
541 sizeof (memif_queue_t) *
542 (++c->rx_queues_num));
543 memset (mq + ar->index, 0, sizeof (memif_queue_t));
545 return memif_syscall_error_handler (errno);
547 c->rx_queues[ar->index].int_fd = fd;
548 c->rx_queues[ar->index].log2_ring_size = ar->log2_ring_size;
549 c->rx_queues[ar->index].region = ar->region;
550 c->rx_queues[ar->index].offset = ar->offset;
551 c->run_args.num_s2m_rings++;
555 if (ar->index > MEMIF_MAX_M2S_RING)
556 return MEMIF_ERR_MAXRING;
557 if (ar->index >= c->args.num_m2s_rings)
558 return MEMIF_ERR_MAXRING;
561 (memif_queue_t *) lm->realloc (c->tx_queues,
562 sizeof (memif_queue_t) *
563 (++c->tx_queues_num));
564 memset (mq + ar->index, 0, sizeof (memif_queue_t));
566 return memif_syscall_error_handler (errno);
568 c->tx_queues[ar->index].int_fd = fd;
569 c->tx_queues[ar->index].log2_ring_size = ar->log2_ring_size;
570 c->tx_queues[ar->index].region = ar->region;
571 c->tx_queues[ar->index].offset = ar->offset;
572 c->run_args.num_m2s_rings++;
575 return MEMIF_ERR_SUCCESS; /* 0 */
578 /* slave -> master */
580 memif_msg_receive_connect (memif_connection_t * c, memif_msg_t * msg)
582 memif_msg_connect_t *cm = &msg->connect;
583 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
584 memif_list_elt_t elt;
587 err = memif_connect1 (c);
588 if (err != MEMIF_ERR_SUCCESS)
591 strncpy ((char *) c->remote_if_name, (char *) cm->if_name,
592 strlen ((char *) cm->if_name));
595 if (c->on_interrupt != NULL)
597 for (i = 0; i < c->run_args.num_m2s_rings; i++)
599 elt.key = c->rx_queues[i].int_fd;
601 add_list_elt (lm, &elt, &lm->interrupt_list,
602 &lm->interrupt_list_len);
604 lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ,
610 c->on_connect ((void *) c, c->private_ctx);
615 /* master -> slave */
617 memif_msg_receive_connected (memif_connection_t * c, memif_msg_t * msg)
619 memif_msg_connect_t *cm = &msg->connect;
620 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
623 err = memif_connect1 (c);
624 if (err != MEMIF_ERR_SUCCESS)
627 strncpy ((char *) c->remote_if_name, (char *) cm->if_name,
628 strlen ((char *) cm->if_name));
631 if (c->on_interrupt != NULL)
633 for (i = 0; i < c->run_args.num_s2m_rings; i++)
635 lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ,
640 c->on_connect ((void *) c, c->private_ctx);
646 memif_msg_receive_disconnect (memif_connection_t * c, memif_msg_t * msg)
648 memif_msg_disconnect_t *d = &msg->disconnect;
650 memset (c->remote_disconnect_string, 0,
651 sizeof (c->remote_disconnect_string));
652 strncpy ((char *) c->remote_disconnect_string, (char *) d->string,
653 strlen ((char *) d->string));
655 /* on returning error, handle function will call memif_disconnect () */
656 DBG ("disconnect received: %s, mode: %d",
657 c->remote_disconnect_string, c->args.mode);
658 return MEMIF_ERR_DISCONNECT;
662 memif_msg_receive (libmemif_main_t * lm, int ifd)
664 char ctl[CMSG_SPACE (sizeof (int)) +
665 CMSG_SPACE (sizeof (struct ucred))] = { 0 };
666 struct msghdr mh = { 0 };
668 memif_msg_t msg = { 0 };
670 int err = MEMIF_ERR_SUCCESS; /* 0 */
673 memif_connection_t *c = NULL;
674 memif_socket_t *ms = NULL;
675 memif_list_elt_t *elt = NULL;
677 iov[0].iov_base = (void *) &msg;
678 iov[0].iov_len = sizeof (memif_msg_t);
681 mh.msg_control = ctl;
682 mh.msg_controllen = sizeof (ctl);
684 DBG ("recvmsg fd %d", ifd);
685 size = recvmsg (ifd, &mh, 0);
686 if (size != sizeof (memif_msg_t))
689 return MEMIF_ERR_DISCONNECTED;
691 return MEMIF_ERR_MFMSG;
694 struct cmsghdr *cmsg;
696 cmsg = CMSG_FIRSTHDR (&mh);
699 if (cmsg->cmsg_level == SOL_SOCKET)
701 if (cmsg->cmsg_type == SCM_CREDENTIALS)
705 else if (cmsg->cmsg_type == SCM_RIGHTS)
707 int *fdp = (int *) CMSG_DATA (cmsg);
711 cmsg = CMSG_NXTHDR (&mh, cmsg);
714 DBG ("Message type %u received", msg.type);
716 get_list_elt (&elt, lm->control_list, lm->control_list_len, ifd);
718 c = (memif_connection_t *) elt->data_struct;
722 case MEMIF_MSG_TYPE_ACK:
725 case MEMIF_MSG_TYPE_HELLO:
726 if ((err = memif_msg_receive_hello (c, &msg)) != MEMIF_ERR_SUCCESS)
728 if ((err = memif_init_regions_and_queues (c)) != MEMIF_ERR_SUCCESS)
730 if ((err = memif_msg_enq_init (c)) != MEMIF_ERR_SUCCESS)
732 for (i = 0; i < c->regions_num; i++)
734 if ((err = memif_msg_enq_add_region (c, i)) != MEMIF_ERR_SUCCESS)
737 for (i = 0; i < c->run_args.num_s2m_rings; i++)
740 memif_msg_enq_add_ring (c, i,
741 MEMIF_RING_S2M)) != MEMIF_ERR_SUCCESS)
744 for (i = 0; i < c->run_args.num_m2s_rings; i++)
747 memif_msg_enq_add_ring (c, i,
748 MEMIF_RING_M2S)) != MEMIF_ERR_SUCCESS)
751 if ((err = memif_msg_enq_connect (c)) != MEMIF_ERR_SUCCESS)
755 case MEMIF_MSG_TYPE_INIT:
756 get_list_elt (&elt, lm->pending_list, lm->pending_list_len, ifd);
759 ms = (memif_socket_t *) elt->data_struct;
760 if ((err = memif_msg_receive_init (ms, ifd, &msg)) != MEMIF_ERR_SUCCESS)
762 /* c->remote_pid = cr->pid */
763 /* c->remote_uid = cr->uid */
764 /* c->remote_gid = cr->gid */
765 get_list_elt (&elt, lm->control_list, lm->control_list_len, ifd);
768 c = (memif_connection_t *) elt->data_struct;
769 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
773 case MEMIF_MSG_TYPE_ADD_REGION:
775 memif_msg_receive_add_region (c, &msg, fd)) != MEMIF_ERR_SUCCESS)
777 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
781 case MEMIF_MSG_TYPE_ADD_RING:
783 memif_msg_receive_add_ring (c, &msg, fd)) != MEMIF_ERR_SUCCESS)
785 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
789 case MEMIF_MSG_TYPE_CONNECT:
790 if ((err = memif_msg_receive_connect (c, &msg)) != MEMIF_ERR_SUCCESS)
792 if ((err = memif_msg_enq_connected (c)) != MEMIF_ERR_SUCCESS)
796 case MEMIF_MSG_TYPE_CONNECTED:
797 if ((err = memif_msg_receive_connected (c, &msg)) != MEMIF_ERR_SUCCESS)
801 case MEMIF_MSG_TYPE_DISCONNECT:
802 if ((err = memif_msg_receive_disconnect (c, &msg)) != MEMIF_ERR_SUCCESS)
807 return MEMIF_ERR_UNKNOWN_MSG;;
812 c->flags |= MEMIF_CONNECTION_FLAG_WRITE;
814 return MEMIF_ERR_SUCCESS; /* 0 */
818 memif_conn_fd_error (memif_connection_t * c)
820 DBG ("connection fd error");
821 strncpy ((char *) c->remote_disconnect_string, "connection fd error", 19);
822 int err = memif_disconnect_internal (c);
826 /* calls memif_msg_receive to handle pending messages on socket */
828 memif_conn_fd_read_ready (memif_connection_t * c)
830 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
833 err = memif_msg_receive (lm, c->fd);
836 err = memif_disconnect_internal (c);
841 /* get msg from msg queue buffer and send it to socket */
843 memif_conn_fd_write_ready (memif_connection_t * c)
845 libmemif_main_t *lm = get_libmemif_main (c->args.socket);
846 int err = MEMIF_ERR_SUCCESS; /* 0 */
849 if ((c->flags & MEMIF_CONNECTION_FLAG_WRITE) == 0)
852 memif_msg_queue_elt_t *e = c->msg_queue;
856 c->msg_queue = c->msg_queue->next;
858 c->flags &= ~MEMIF_CONNECTION_FLAG_WRITE;
860 err = memif_msg_send (c->fd, &e->msg, e->fd);
869 memif_conn_fd_accept_ready (memif_socket_t * ms)
872 struct sockaddr_un client;
874 libmemif_main_t *lm = get_libmemif_main (ms);
876 DBG ("accept called");
878 addr_len = sizeof (client);
880 accept (ms->fd, (struct sockaddr *) &client, (socklen_t *) & addr_len);
884 return memif_syscall_error_handler (errno);
886 DBG ("accept fd %d", ms->fd);
887 DBG ("conn fd %d", conn_fd);
889 memif_list_elt_t elt;
891 elt.data_struct = ms;
893 add_list_elt (lm, &elt, &lm->pending_list, &lm->pending_list_len);
894 lm->control_fd_update (conn_fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_WRITE,
897 return memif_msg_send_hello (lm, conn_fd);
901 memif_read_ready (libmemif_main_t * lm, int fd)
905 err = memif_msg_receive (lm, fd);