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 = &libmemif_main;
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 (int fd)
104 libmemif_main_t *lm = &libmemif_main;
105 memif_msg_t msg = { 0 };
106 memif_msg_hello_t *h = &msg.hello;
107 msg.type = MEMIF_MSG_TYPE_HELLO;
108 h->min_version = MEMIF_VERSION;
109 h->max_version = MEMIF_VERSION;
110 h->max_s2m_ring = MEMIF_MAX_M2S_RING;
111 h->max_m2s_ring = MEMIF_MAX_M2S_RING;
112 h->max_region = MEMIF_MAX_REGION;
113 h->max_log2_ring_size = MEMIF_MAX_LOG2_RING_SIZE;
115 strncpy ((char *) h->name, lm->app_name, strlen (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 = &libmemif_main;
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));
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 = &libmemif_main;
169 /* maybe check if region is valid? */
170 memif_region_t *mr = &c->regions[region_index];
172 memif_msg_queue_elt_t *e =
173 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
175 return memif_syscall_error_handler (errno);
177 memset (&e->msg, 0, sizeof (e->msg));
178 memif_msg_add_region_t *ar = &e->msg.add_region;
180 e->msg.type = MEMIF_MSG_TYPE_ADD_REGION;
182 ar->index = region_index;
183 ar->size = mr->region_size;
186 if (c->msg_queue == NULL)
189 return MEMIF_ERR_SUCCESS; /* 0 */
192 memif_msg_queue_elt_t *cur = c->msg_queue;
193 while (cur->next != NULL)
199 return MEMIF_ERR_SUCCESS; /* 0 */
202 /* send information about ring specified by direction (S2M | M2S) and index */
204 memif_msg_enq_add_ring (memif_connection_t * c, uint8_t index, uint8_t dir)
206 libmemif_main_t *lm = &libmemif_main;
207 memif_msg_queue_elt_t *e =
208 (memif_msg_queue_elt_t *) lm->alloc (sizeof (memif_msg_queue_elt_t));
210 return memif_syscall_error_handler (errno);
212 memset (&e->msg, 0, sizeof (e->msg));
213 memif_msg_add_ring_t *ar = &e->msg.add_ring;
215 e->msg.type = MEMIF_MSG_TYPE_ADD_RING;
217 /* TODO: support multiple rings */
219 if (dir == MEMIF_RING_M2S)
220 mq = &c->rx_queues[index];
222 mq = &c->tx_queues[index];
226 ar->offset = mq->offset;
227 ar->region = mq->region;
228 ar->log2_ring_size = mq->log2_ring_size;
229 ar->flags = (dir == MEMIF_RING_S2M) ? MEMIF_MSG_ADD_RING_FLAG_S2M : 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 = &libmemif_main;
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 = &libmemif_main;
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 = &libmemif_main;
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));
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 (&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);
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 memif_msg_add_region_t *ar = &msg->add_region;
489 return MEMIF_ERR_NO_SHMFD;
491 if (ar->index > MEMIF_MAX_REGION)
492 return MEMIF_ERR_MAXREG;
495 (memif_region_t *) realloc (c->regions,
496 sizeof (memif_region_t) * (ar->index + 1));
498 return memif_syscall_error_handler (errno);
500 c->regions[ar->index].fd = fd;
501 c->regions[ar->index].region_size = ar->size;
502 c->regions[ar->index].shm = NULL;
504 return MEMIF_ERR_SUCCESS; /* 0 */
507 /* receive ring information and add new ring to connection queue
508 (based on direction S2M | M2S) */
510 memif_msg_receive_add_ring (memif_connection_t * c, memif_msg_t * msg, int fd)
512 memif_msg_add_ring_t *ar = &msg->add_ring;
517 return MEMIF_ERR_NO_INTFD;
519 if (ar->flags & MEMIF_MSG_ADD_RING_FLAG_S2M)
521 if (ar->index > MEMIF_MAX_S2M_RING)
522 return MEMIF_ERR_MAXRING;
523 if (ar->index >= c->args.num_s2m_rings)
524 return MEMIF_ERR_MAXRING;
527 (memif_queue_t *) realloc (c->rx_queues,
528 sizeof (memif_queue_t) * (ar->index + 1));
529 memset (mq, 0, sizeof (memif_queue_t) * (ar->index + 1));
531 return memif_syscall_error_handler (errno);
533 c->rx_queues[ar->index].int_fd = fd;
534 c->rx_queues[ar->index].log2_ring_size = ar->log2_ring_size;
535 c->rx_queues[ar->index].region = ar->region;
536 c->rx_queues[ar->index].offset = ar->offset;
537 c->run_args.num_s2m_rings++;
541 if (ar->index > MEMIF_MAX_M2S_RING)
542 return MEMIF_ERR_MAXRING;
543 if (ar->index >= c->args.num_m2s_rings)
544 return MEMIF_ERR_MAXRING;
547 (memif_queue_t *) realloc (c->tx_queues,
548 sizeof (memif_queue_t) * (ar->index + 1));
549 memset (mq, 0, sizeof (memif_queue_t) * (ar->index + 1));
551 return memif_syscall_error_handler (errno);
553 c->tx_queues[ar->index].int_fd = fd;
554 c->tx_queues[ar->index].log2_ring_size = ar->log2_ring_size;
555 c->tx_queues[ar->index].region = ar->region;
556 c->tx_queues[ar->index].offset = ar->offset;
557 c->run_args.num_m2s_rings++;
560 return MEMIF_ERR_SUCCESS; /* 0 */
563 /* slave -> master */
565 memif_msg_receive_connect (memif_connection_t * c, memif_msg_t * msg)
567 memif_msg_connect_t *cm = &msg->connect;
568 libmemif_main_t *lm = &libmemif_main;
569 memif_list_elt_t elt;
572 err = memif_connect1 (c);
573 if (err != MEMIF_ERR_SUCCESS)
576 strncpy ((char *) c->remote_if_name, (char *) cm->if_name,
577 strlen ((char *) cm->if_name));
580 if (c->on_interrupt != NULL)
582 for (i = 0; i < c->run_args.num_m2s_rings; i++)
584 elt.key = c->rx_queues[i].int_fd;
586 add_list_elt (&elt, &lm->interrupt_list, &lm->interrupt_list_len);
588 lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ);
590 /* refill ring buffers */
591 memif_refill_queue ((void *) c, i, -1);
596 c->on_connect ((void *) c, c->private_ctx);
601 /* master -> slave */
603 memif_msg_receive_connected (memif_connection_t * c, memif_msg_t * msg)
605 memif_msg_connect_t *cm = &msg->connect;
606 libmemif_main_t *lm = &libmemif_main;
609 err = memif_connect1 (c);
610 if (err != MEMIF_ERR_SUCCESS)
613 strncpy ((char *) c->remote_if_name, (char *) cm->if_name,
614 strlen ((char *) cm->if_name));
617 if (c->on_interrupt != NULL)
619 for (i = 0; i < c->run_args.num_s2m_rings; i++)
621 lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ);
623 /* refill ring buffers */
624 memif_refill_queue ((void *) c, i, -1);
628 c->on_connect ((void *) c, c->private_ctx);
634 memif_msg_receive_disconnect (memif_connection_t * c, memif_msg_t * msg)
636 memif_msg_disconnect_t *d = &msg->disconnect;
638 memset (c->remote_disconnect_string, 0,
639 sizeof (c->remote_disconnect_string));
640 strncpy ((char *) c->remote_disconnect_string, (char *) d->string,
641 strlen ((char *) d->string));
643 /* on returning error, handle function will call memif_disconnect () */
644 DBG ("disconnect received: %s, mode: %d",
645 c->remote_disconnect_string, c->args.mode);
646 return MEMIF_ERR_DISCONNECT;
650 memif_msg_receive (int ifd)
652 char ctl[CMSG_SPACE (sizeof (int)) +
653 CMSG_SPACE (sizeof (struct ucred))] = { 0 };
654 struct msghdr mh = { 0 };
656 memif_msg_t msg = { 0 };
658 int err = MEMIF_ERR_SUCCESS; /* 0 */
661 libmemif_main_t *lm = &libmemif_main;
662 memif_connection_t *c = NULL;
663 memif_socket_t *ms = NULL;
664 memif_list_elt_t *elt = NULL;
666 iov[0].iov_base = (void *) &msg;
667 iov[0].iov_len = sizeof (memif_msg_t);
670 mh.msg_control = ctl;
671 mh.msg_controllen = sizeof (ctl);
673 DBG ("recvmsg fd %d", ifd);
674 size = recvmsg (ifd, &mh, 0);
676 if (size != sizeof (memif_msg_t))
679 return MEMIF_ERR_DISCONNECTED;
681 return MEMIF_ERR_MFMSG;
684 struct ucred *cr = 0;
685 struct cmsghdr *cmsg;
687 cmsg = CMSG_FIRSTHDR (&mh);
690 if (cmsg->cmsg_level == SOL_SOCKET)
692 if (cmsg->cmsg_type == SCM_CREDENTIALS)
694 cr = (struct ucred *) CMSG_DATA (cmsg);
696 else if (cmsg->cmsg_type == SCM_RIGHTS)
698 int *fdp = (int *) CMSG_DATA (cmsg);
702 cmsg = CMSG_NXTHDR (&mh, cmsg);
705 DBG ("Message type %u received", msg.type);
707 get_list_elt (&elt, lm->control_list, lm->control_list_len, ifd);
709 c = (memif_connection_t *) elt->data_struct;
713 case MEMIF_MSG_TYPE_ACK:
716 case MEMIF_MSG_TYPE_HELLO:
717 if ((err = memif_msg_receive_hello (c, &msg)) != MEMIF_ERR_SUCCESS)
719 if ((err = memif_init_regions_and_queues (c)) != MEMIF_ERR_SUCCESS)
721 if ((err = memif_msg_enq_init (c)) != MEMIF_ERR_SUCCESS)
723 if ((err = memif_msg_enq_add_region (c, 0)) != MEMIF_ERR_SUCCESS)
725 for (i = 0; i < c->run_args.num_s2m_rings; i++)
728 memif_msg_enq_add_ring (c, i,
729 MEMIF_RING_S2M)) != MEMIF_ERR_SUCCESS)
732 for (i = 0; i < c->run_args.num_m2s_rings; i++)
735 memif_msg_enq_add_ring (c, i,
736 MEMIF_RING_M2S)) != MEMIF_ERR_SUCCESS)
739 if ((err = memif_msg_enq_connect (c)) != MEMIF_ERR_SUCCESS)
743 case MEMIF_MSG_TYPE_INIT:
744 get_list_elt (&elt, lm->pending_list, lm->pending_list_len, ifd);
747 ms = (memif_socket_t *) elt->data_struct;
748 if ((err = memif_msg_receive_init (ms, ifd, &msg)) != MEMIF_ERR_SUCCESS)
750 /* c->remote_pid = cr->pid */
751 /* c->remote_uid = cr->uid */
752 /* c->remote_gid = cr->gid */
753 get_list_elt (&elt, lm->control_list, lm->control_list_len, ifd);
756 c = (memif_connection_t *) elt->data_struct;
757 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
761 case MEMIF_MSG_TYPE_ADD_REGION:
763 memif_msg_receive_add_region (c, &msg, fd)) != MEMIF_ERR_SUCCESS)
765 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
769 case MEMIF_MSG_TYPE_ADD_RING:
771 memif_msg_receive_add_ring (c, &msg, fd)) != MEMIF_ERR_SUCCESS)
773 if ((err = memif_msg_enq_ack (c)) != MEMIF_ERR_SUCCESS)
777 case MEMIF_MSG_TYPE_CONNECT:
778 if ((err = memif_msg_receive_connect (c, &msg)) != MEMIF_ERR_SUCCESS)
780 if ((err = memif_msg_enq_connected (c)) != MEMIF_ERR_SUCCESS)
784 case MEMIF_MSG_TYPE_CONNECTED:
785 if ((err = memif_msg_receive_connected (c, &msg)) != MEMIF_ERR_SUCCESS)
789 case MEMIF_MSG_TYPE_DISCONNECT:
790 if ((err = memif_msg_receive_disconnect (c, &msg)) != MEMIF_ERR_SUCCESS)
795 return MEMIF_ERR_UNKNOWN_MSG;;
800 c->flags |= MEMIF_CONNECTION_FLAG_WRITE;
801 /* libmemif_main_t *lm = &libmemif_main;
802 lm->control_fd_update (c->fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_MOD); */
803 return MEMIF_ERR_SUCCESS; /* 0 */
807 memif_conn_fd_error (memif_connection_t * c)
809 DBG ("connection fd error");
810 strncpy ((char *) c->remote_disconnect_string, "connection fd error", 19);
811 int err = memif_disconnect_internal (c);
815 /* calls memif_msg_receive to handle pending messages on socket */
817 memif_conn_fd_read_ready (memif_connection_t * c)
820 err = memif_msg_receive (c->fd);
823 err = memif_disconnect_internal (c);
828 /* get msg from msg queue buffer and send it to socket */
830 memif_conn_fd_write_ready (memif_connection_t * c)
832 libmemif_main_t *lm = &libmemif_main;
833 int err = MEMIF_ERR_SUCCESS; /* 0 */
836 if ((c->flags & MEMIF_CONNECTION_FLAG_WRITE) == 0)
839 memif_msg_queue_elt_t *e = c->msg_queue;
843 c->msg_queue = c->msg_queue->next;
845 c->flags &= ~MEMIF_CONNECTION_FLAG_WRITE;
847 libmemif_main_t *lm = &libmemif_main;
849 lm->control_fd_update (c->fd,
850 MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_WRITE | MEMIF_FD_EVENT_MOD);
852 err = memif_msg_send (c->fd, &e->msg, e->fd);
861 memif_conn_fd_accept_ready (memif_socket_t * ms)
864 struct sockaddr_un client;
866 libmemif_main_t *lm = &libmemif_main;
868 DBG ("accept called");
870 addr_len = sizeof (client);
872 accept (ms->fd, (struct sockaddr *) &client, (socklen_t *) & addr_len);
876 return memif_syscall_error_handler (errno);
878 DBG ("accept fd %d", ms->fd);
879 DBG ("conn fd %d", conn_fd);
881 memif_list_elt_t elt;
883 elt.data_struct = ms;
885 add_list_elt (&elt, &lm->pending_list, &lm->pending_list_len);
886 lm->control_fd_update (conn_fd, MEMIF_FD_EVENT_READ | MEMIF_FD_EVENT_WRITE);
888 return memif_msg_send_hello (conn_fd);
892 memif_read_ready (int fd)
896 err = memif_msg_receive (fd);
897 DBG ("recv finished");