2 * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
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.
26 #define TRACE_TAG TRACE_SOCKETS
33 SDB_MUTEX_DEFINE( socket_list_lock );
35 static void local_socket_close_locked(asocket *s);
37 int sendfailmsg(int fd, const char *reason)
42 if(len > 0xffff) len = 0xffff;
43 snprintf(buf, sizeof buf, "FAIL%04x", len);
44 if(writex(fd, buf, 8)) return -1;
45 return writex(fd, reason, len);
50 static unsigned local_socket_next_id = 1;
52 static asocket local_socket_list = {
53 .next = &local_socket_list,
54 .prev = &local_socket_list,
57 /* the the list of currently closing local sockets.
58 ** these have no peer anymore, but still packets to
61 static asocket local_socket_closing_list = {
62 .next = &local_socket_closing_list,
63 .prev = &local_socket_closing_list,
66 asocket *find_local_socket(unsigned id)
69 asocket *result = NULL;
71 sdb_mutex_lock(&socket_list_lock);
72 for (s = local_socket_list.next; s != &local_socket_list; s = s->next) {
78 sdb_mutex_unlock(&socket_list_lock);
84 insert_local_socket(asocket* s, asocket* list)
87 s->prev = s->next->prev;
93 void install_local_socket(asocket *s)
95 sdb_mutex_lock(&socket_list_lock);
97 s->id = local_socket_next_id++;
98 insert_local_socket(s, &local_socket_list);
100 sdb_mutex_unlock(&socket_list_lock);
103 void remove_socket(asocket *s)
105 // socket_list_lock should already be held
106 if (s->prev && s->next)
108 s->prev->next = s->next;
109 s->next->prev = s->prev;
116 void close_all_sockets(atransport *t)
120 /* this is a little gross, but since s->close() *will* modify
121 ** the list out from under you, your options are limited.
123 sdb_mutex_lock(&socket_list_lock);
125 for(s = local_socket_list.next; s != &local_socket_list; s = s->next){
126 if(s->transport == t || (s->peer && s->peer->transport == t)) {
127 local_socket_close_locked(s);
131 sdb_mutex_unlock(&socket_list_lock);
134 static int local_socket_enqueue(asocket *s, apacket *p)
136 D("LS(%d): enqueue %d\n", s->id, p->len);
140 /* if there is already data queue'd, we will receive
141 ** events when it's time to write. just add this to
148 /* write as much as we can, until we
149 ** would block or there is an error/eof
152 int r = sdb_write(s->fd, p->ptr, p->len);
158 if((r == 0) || (errno != EAGAIN)) {
159 D( "LS(%d): not ready, errno=%d\n", s->id, errno);
161 return 1; /* not ready (error) */
169 return 0; /* ready for more data */
175 s->pkt_last->next = p;
181 /* make sure we are notified when we can drain the queue */
182 fdevent_add(&s->fde, FDE_WRITE);
184 return 1; /* not ready (backlog) */
187 static void local_socket_ready(asocket *s)
189 /* far side is ready for data, pay attention to
191 fdevent_add(&s->fde, FDE_READ);
192 // D("LS(%d): ready()\n", s->id);
195 static void local_socket_close(asocket *s)
197 sdb_mutex_lock(&socket_list_lock);
198 local_socket_close_locked(s);
199 sdb_mutex_unlock(&socket_list_lock);
202 // be sure to hold the socket list lock when calling this
203 static void local_socket_destroy(asocket *s)
207 D("LS(%d): destroying fde.fd=%d\n", s->id, s->fde.fd);
209 /* IMPORTANT: the remove closes the fd
210 ** that belongs to this socket
212 fdevent_remove(&s->fde);
214 /* dispose of any unwritten data */
215 for(p = s->pkt_first; p; p = n) {
216 D("LS(%d): discarding %d bytes\n", s->id, p->len);
225 static void local_socket_close_locked(asocket *s)
227 D("entered. LS(%d) fd=%d\n", s->id, s->fd);
229 D("LS(%d): closing peer. peer->id=%d peer->fd=%d\n",
230 s->id, s->peer->id, s->peer->fd);
232 // tweak to avoid deadlock
233 if (s->peer->close == local_socket_close) {
234 local_socket_close_locked(s->peer);
236 s->peer->close(s->peer);
241 /* If we are already closing, or if there are no
242 ** pending packets, destroy immediately
244 if (s->closing || s->pkt_first == NULL) {
246 local_socket_destroy(s);
247 D("LS(%d): closed\n", id);
251 /* otherwise, put on the closing list
253 D("LS(%d): closing\n", s->id);
255 fdevent_del(&s->fde, FDE_READ);
257 D("LS(%d): put on socket_closing_list fd=%d\n", s->id, s->fd);
258 insert_local_socket(s, &local_socket_closing_list);
261 static void local_socket_event_func(int fd, unsigned ev, void *_s)
265 D("LS(%d): event_func(fd=%d(==%d), ev=%04x)\n", s->id, s->fd, fd, ev);
267 /* put the FDE_WRITE processing before the FDE_READ
268 ** in order to simplify the code.
273 while((p = s->pkt_first) != 0) {
275 int r = sdb_write(fd, p->ptr, p->len);
282 /* returning here is ok because FDE_READ will
283 ** be processed in the next iteration loop
285 if(errno == EAGAIN) return;
286 if(errno == EINTR) continue;
288 D(" closing after write because r=%d and errno is %d\n", r, errno);
294 s->pkt_first = p->next;
295 if(s->pkt_first == 0) s->pkt_last = 0;
300 /* if we sent the last packet of a closing socket,
301 ** we can now destroy it.
304 D(" closing because 'closing' is set after write\n");
309 /* no more packets queued, so we can ignore
310 ** writable events again and tell our peer
313 fdevent_del(&s->fde, FDE_WRITE);
314 s->peer->ready(s->peer);
319 apacket *p = get_apacket();
320 unsigned char *x = p->data;
321 #ifdef SUPPORT_ENCRYPT
322 // sdb.c:536에서 sdb server의 패킷은 MAX_PAYLOAD-100으로 정하여서,
323 // sdb server에서 패킷 데이터의 크기를 MAX_PAYLOAD-100보다 작은 지를 체크함.
324 // sdbd에서 패킷 데이터를 MAX_PAYLOAD - 200로 잡아서 암호화 하게되면
325 // 최대 MAX_PAYLOAD - 100 크기의 패킷을 생성하게 됨.
326 const size_t max_payload = asock_get_max_payload(s) - 200;
328 const size_t max_payload = asock_get_max_payload(s);
330 int avail = max_payload;
335 r = sdb_read(fd, x, avail);
336 D("LS(%d): post sdb_read(fd=%d,...) r=%d (errno=%d) avail=%d\n",
337 s->id, s->fd, r, r < 0 ? errno : 0, avail);
338 if (r > 0 && r <= avail) {
344 if (errno == EAGAIN) break;
345 if (errno == EINTR) continue;
348 /* r = 0 or unhandled error */
352 D("LS(%d): fd=%d post avail loop. r=%d is_eof=%d forced_eof=%d\n",
353 s->id, s->fd, r, is_eof, s->fde.force_eof);
355 //변경된 최대 패킷 크기로 코드 수정
356 if ((avail == max_payload) || (s->peer == 0)) {
359 p->len = max_payload >= avail ? max_payload - avail : 0;
360 r = s->peer->enqueue(s->peer, p);
361 D("LS(%d): fd=%d post peer->enqueue(). r=%d\n", s->id, s->fd, r);
364 /* error return means they closed us as a side-effect
365 ** and we must return immediately.
367 ** note that if we still have buffered packets, the
368 ** socket will be placed on the closing socket list.
369 ** this handler function will be called again
370 ** to process FDE_WRITE events.
376 /* if the remote cannot accept further events,
377 ** we disable notification of READs. They'll
378 ** be enabled again when we get a call to ready()
380 fdevent_del(&s->fde, FDE_READ);
383 /* Don't allow a forced eof if data is still there */
384 if((s->fde.force_eof && !r) || is_eof) {
385 D(" closing because is_eof=%d r=%d s->fde.force_eof=%d\n", is_eof, r, s->fde.force_eof);
391 /* this should be caught be the next read or write
392 ** catching it here means we may skip the last few
393 ** bytes of readable data.
396 D("LS(%d): FDE_ERROR (fd=%d)\n", s->id, s->fd);
402 asocket *create_local_socket(int fd)
404 asocket *s = calloc(1, sizeof(asocket));
405 if (s == NULL) fatal("cannot allocate socket");
407 s->enqueue = local_socket_enqueue;
408 s->ready = local_socket_ready;
409 s->close = local_socket_close;
410 install_local_socket(s);
412 fdevent_install(&s->fde, fd, local_socket_event_func, s);
413 /* fdevent_add(&s->fde, FDE_ERROR); */
414 //fprintf(stderr, "Created local socket in create_local_socket \n");
415 D("LS(%d): created (fd=%d)\n", s->id, s->fd);
419 asocket *create_local_service_socket(const char *name)
424 #if 0 /* not support in tizen */
425 if (!strcmp(name,"jdwp")) {
426 return create_jdwp_service_socket();
428 if (!strcmp(name,"track-jdwp")) {
429 return create_jdwp_tracker_service_socket();
432 fd = service_to_fd(name);
435 s = create_local_socket(fd);
436 D("LS(%d): bound to '%s' via %d\n", s->id, name, fd);
441 /* a Remote socket is used to send/receive data to/from a given transport object
442 ** it needs to be closed when the transport is forcibly destroyed by the user
444 typedef struct aremotesocket {
446 adisconnect disconnect;
449 static int remote_socket_enqueue(asocket *s, apacket *p)
451 D("entered remote_socket_enqueue RS(%d) WRITE fd=%d peer.fd=%d\n",
452 s->id, s->fd, s->peer->fd);
453 p->msg.command = A_WRTE;
454 p->msg.arg0 = s->peer->id;
456 p->msg.data_length = p->len;
457 send_packet(p, s->transport);
461 static void remote_socket_ready(asocket *s)
463 D("entered remote_socket_ready RS(%d) OKAY fd=%d peer.fd=%d\n",
464 s->id, s->fd, s->peer->fd);
465 apacket *p = get_apacket();
466 p->msg.command = A_OKAY;
467 p->msg.arg0 = s->peer->id;
469 send_packet(p, s->transport);
472 static void remote_socket_close(asocket *s)
474 D("entered remote_socket_close RS(%d) CLOSE fd=%d peer->fd=%d\n",
475 s->id, s->fd, s->peer?s->peer->fd:-1);
476 apacket *p = get_apacket();
477 p->msg.command = A_CLSE;
479 p->msg.arg0 = s->peer->id;
481 D("RS(%d) peer->close()ing peer->id=%d peer->fd=%d\n",
482 s->id, s->peer->id, s->peer->fd);
483 s->peer->close(s->peer);
486 send_packet(p, s->transport);
487 D("RS(%d): closed\n", s->id);
488 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect );
492 static void remote_socket_disconnect(void* _s, atransport* t)
495 asocket* peer = s->peer;
497 D("remote_socket_disconnect RS(%d)\n", s->id);
502 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect );
506 asocket *create_remote_socket(unsigned id, atransport *t)
508 asocket *s = calloc(1, sizeof(aremotesocket));
509 adisconnect* dis = &((aremotesocket*)s)->disconnect;
511 if (s == NULL) fatal("cannot allocate socket");
513 s->enqueue = remote_socket_enqueue;
514 s->ready = remote_socket_ready;
515 s->close = remote_socket_close;
518 dis->func = remote_socket_disconnect;
520 add_transport_disconnect( t, dis );
521 D("RS(%d): created\n", s->id);
525 void connect_to_remote(asocket *s, const char *destination)
527 D("Connect_to_remote call RS(%d) fd=%d\n", s->id, s->fd);
528 apacket *p = get_apacket();
529 size_t len = strlen(destination) + 1;
531 if(len > (asock_get_max_payload(s)-1)) {
532 fatal("destination oversized");
535 D("LS(%d): connect('%s')\n", s->id, destination);
536 p->msg.command = A_OPEN;
538 p->msg.data_length = len;
539 s_strncpy((char*) p->data, destination, len);
540 send_packet(p, s->transport);
544 /* this is used by magic sockets to rig local sockets to
545 send the go-ahead message when they connect */
546 static void local_socket_ready_notify(asocket *s)
548 s->ready = local_socket_ready;
549 s->close = local_socket_close;
550 sdb_write(s->fd, "OKAY", 4);
554 /* this is used by magic sockets to rig local sockets to
555 send the failure message if they are closed before
556 connected (to avoid closing them without a status message) */
557 static void local_socket_close_notify(asocket *s)
559 s->ready = local_socket_ready;
560 s->close = local_socket_close;
561 sendfailmsg(s->fd, "closed");
565 unsigned unhex(unsigned char *s, int len)
571 case '0': case '1': case '2':
572 case '3': case '4': case '5':
573 case '6': case '7': case '8':
577 case 'a': case 'b': case 'c':
578 case 'd': case 'e': case 'f':
581 case 'A': case 'B': case 'C':
582 case 'D': case 'E': case 'F':
595 /* skip_host_serial return the position in a string
596 skipping over the 'serial' parameter in the SDB protocol,
597 where parameter string may be a host:port string containing
598 the protocol delimiter (colon). */
599 char *skip_host_serial(char *service) {
600 char *first_colon, *serial_end;
602 first_colon = strchr(service, ':');
604 /* No colon in service string. */
607 serial_end = first_colon;
608 if (isdigit(serial_end[1])) {
610 while ((*serial_end) && isdigit(*serial_end)) {
613 if ((*serial_end) != ':') {
614 // Something other than numbers was found, reset the end.
615 serial_end = first_colon;
621 static int smart_socket_enqueue(asocket *s, apacket *p)
625 D("SS(%d): enqueue %d\n", s->id, p->len);
627 if(s->pkt_first == 0) {
631 if((s->pkt_first->len + p->len) > asock_get_max_payload(s)) {
632 D("SS(%d): overflow\n", s->id);
637 memcpy(s->pkt_first->data + s->pkt_first->len,
639 s->pkt_first->len += p->len;
645 /* don't bother if we can't decode the length */
646 if(p->len < 4) return 0;
648 len = unhex(p->data, 4);
649 if((len < 1) || (len > 1024)) {
650 D("SS(%d): bad size (%d)\n", s->id, len);
654 D("SS(%d): len is %d\n", s->id, len );
655 /* can't do anything until we have the full header */
656 if((len + 4) > p->len) {
657 D("SS(%d): waiting for %d more bytes\n", s->id, len+4 - p->len);
661 p->data[len + 4] = 0;
663 D("SS(%d): '%s'\n", s->id, (char*) (p->data + 4));
665 if (s->transport == NULL) {
666 char* error_string = "unknown failure";
667 s->transport = acquire_one_transport (CS_ANY,
668 kTransportAny, NULL, &error_string);
670 if (s->transport == NULL) {
671 sendfailmsg(s->peer->fd, error_string);
676 if(!(s->transport) || (s->transport->connection_state == CS_OFFLINE)) {
677 /* if there's no remote we fail the connection
678 ** right here and terminate it
680 sendfailmsg(s->peer->fd, "device offline (x)");
685 /* instrument our peer to pass the success or fail
686 ** message back once it connects or closes, then
687 ** detach from it, request the connection, and
690 s->peer->ready = local_socket_ready_notify;
691 s->peer->close = local_socket_close_notify;
693 /* give him our transport and upref it */
694 s->peer->transport = s->transport;
696 connect_to_remote(s->peer, (char*) (p->data + 4));
702 /* we're going to close our peer as a side-effect, so
703 ** return -1 to signal that state to the local socket
704 ** who is enqueueing against us
710 static void smart_socket_ready(asocket *s)
712 D("SS(%d): ready\n", s->id);
715 static void smart_socket_close(asocket *s)
717 D("SS(%d): closed\n", s->id);
719 put_apacket(s->pkt_first);
723 s->peer->close(s->peer);
729 asocket *create_smart_socket(void (*action_cb)(asocket *s, const char *act))
731 D("Creating smart socket \n");
732 asocket *s = calloc(1, sizeof(asocket));
733 if (s == NULL) fatal("cannot allocate socket");
734 s->enqueue = smart_socket_enqueue;
735 s->ready = smart_socket_ready;
736 s->close = smart_socket_close;
737 s->extra = action_cb;
739 D("SS(%d): created %p\n", s->id, action_cb);
743 void smart_socket_action(asocket *s, const char *act)
748 void connect_to_smartsocket(asocket *s)
750 D("Connecting to smart socket \n");
751 asocket *ss = create_smart_socket(smart_socket_action);
757 size_t asock_get_max_payload(asocket *s)
759 size_t max_payload = MAX_PAYLOAD;
761 max_payload = min(max_payload, s->transport->max_payload);
763 if (s->peer && s->peer->transport) {
764 max_payload = min(max_payload, s->peer->transport->max_payload);