sockets.c revision d15e6ac95dc898fb78fb5917bb2e4498b40b716f
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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 */ 16 17#include <stdio.h> 18#include <stdlib.h> 19#include <unistd.h> 20#include <errno.h> 21#include <string.h> 22#include <ctype.h> 23 24#include "sysdeps.h" 25 26#define TRACE_TAG TRACE_SOCKETS 27#include "adb.h" 28 29ADB_MUTEX_DEFINE( socket_list_lock ); 30 31static void local_socket_close_locked(asocket *s); 32 33int sendfailmsg(int fd, const char *reason) 34{ 35 char buf[9]; 36 int len; 37 len = strlen(reason); 38 if(len > 0xffff) len = 0xffff; 39 snprintf(buf, sizeof buf, "FAIL%04x", len); 40 if(writex(fd, buf, 8)) return -1; 41 return writex(fd, reason, len); 42} 43 44//extern int online; 45 46static unsigned local_socket_next_id = 1; 47 48static asocket local_socket_list = { 49 .next = &local_socket_list, 50 .prev = &local_socket_list, 51}; 52 53/* the the list of currently closing local sockets. 54** these have no peer anymore, but still packets to 55** write to their fd. 56*/ 57static asocket local_socket_closing_list = { 58 .next = &local_socket_closing_list, 59 .prev = &local_socket_closing_list, 60}; 61 62asocket *find_local_socket(unsigned id) 63{ 64 asocket *s; 65 asocket *result = NULL; 66 67 adb_mutex_lock(&socket_list_lock); 68 for (s = local_socket_list.next; s != &local_socket_list; s = s->next) { 69 if (s->id == id) { 70 result = s; 71 break; 72 } 73 } 74 adb_mutex_unlock(&socket_list_lock); 75 76 return result; 77} 78 79static void 80insert_local_socket(asocket* s, asocket* list) 81{ 82 s->next = list; 83 s->prev = s->next->prev; 84 s->prev->next = s; 85 s->next->prev = s; 86} 87 88 89void install_local_socket(asocket *s) 90{ 91 adb_mutex_lock(&socket_list_lock); 92 93 s->id = local_socket_next_id++; 94 insert_local_socket(s, &local_socket_list); 95 96 adb_mutex_unlock(&socket_list_lock); 97} 98 99void remove_socket(asocket *s) 100{ 101 // socket_list_lock should already be held 102 if (s->prev && s->next) 103 { 104 s->prev->next = s->next; 105 s->next->prev = s->prev; 106 s->next = 0; 107 s->prev = 0; 108 s->id = 0; 109 } 110} 111 112void close_all_sockets(atransport *t) 113{ 114 asocket *s; 115 116 /* this is a little gross, but since s->close() *will* modify 117 ** the list out from under you, your options are limited. 118 */ 119 adb_mutex_lock(&socket_list_lock); 120restart: 121 for(s = local_socket_list.next; s != &local_socket_list; s = s->next){ 122 if(s->transport == t || (s->peer && s->peer->transport == t)) { 123 local_socket_close_locked(s); 124 goto restart; 125 } 126 } 127 adb_mutex_unlock(&socket_list_lock); 128} 129 130static int local_socket_enqueue(asocket *s, apacket *p) 131{ 132 D("LS(%d): enqueue %d\n", s->id, p->len); 133 134 p->ptr = p->data; 135 136 /* if there is already data queue'd, we will receive 137 ** events when it's time to write. just add this to 138 ** the tail 139 */ 140 if(s->pkt_first) { 141 goto enqueue; 142 } 143 144 /* write as much as we can, until we 145 ** would block or there is an error/eof 146 */ 147 while(p->len > 0) { 148 int r = adb_write(s->fd, p->ptr, p->len); 149 if(r > 0) { 150 p->len -= r; 151 p->ptr += r; 152 continue; 153 } 154 if((r == 0) || (errno != EAGAIN)) { 155 D( "LS(%d): not ready, errno=%d: %s\n", s->id, errno, strerror(errno) ); 156 s->close(s); 157 return 1; /* not ready (error) */ 158 } else { 159 break; 160 } 161 } 162 163 if(p->len == 0) { 164 put_apacket(p); 165 return 0; /* ready for more data */ 166 } 167 168enqueue: 169 p->next = 0; 170 if(s->pkt_first) { 171 s->pkt_last->next = p; 172 } else { 173 s->pkt_first = p; 174 } 175 s->pkt_last = p; 176 177 /* make sure we are notified when we can drain the queue */ 178 fdevent_add(&s->fde, FDE_WRITE); 179 180 return 1; /* not ready (backlog) */ 181} 182 183static void local_socket_ready(asocket *s) 184{ 185 /* far side is ready for data, pay attention to 186 readable events */ 187 fdevent_add(&s->fde, FDE_READ); 188// D("LS(%d): ready()\n", s->id); 189} 190 191static void local_socket_close(asocket *s) 192{ 193#if ADB_HOST 194 /* to special case commands that cause the remote daemon to terminate */ 195 if (s->kick_on_close && s->transport) { 196 kick_transport(s->transport); 197 /* delay to work around a race condition */ 198 sleep(1); 199 } 200#endif 201 adb_mutex_lock(&socket_list_lock); 202 local_socket_close_locked(s); 203 adb_mutex_unlock(&socket_list_lock); 204} 205 206// be sure to hold the socket list lock when calling this 207static void local_socket_destroy(asocket *s) 208{ 209 apacket *p, *n; 210 D("LS(%d): destroying fde.fd=%d\n", s->id, s->fde.fd); 211 212 /* IMPORTANT: the remove closes the fd 213 ** that belongs to this socket 214 */ 215 fdevent_remove(&s->fde); 216 217 /* dispose of any unwritten data */ 218 for(p = s->pkt_first; p; p = n) { 219 D("LS(%d): discarding %d bytes\n", s->id, p->len); 220 n = p->next; 221 put_apacket(p); 222 } 223 remove_socket(s); 224 free(s); 225} 226 227 228static void local_socket_close_locked(asocket *s) 229{ 230 D("entered. LS(%d) fd=%d\n", s->id, s->fd); 231 if(s->peer) { 232 D("LS(%d): closing peer. peer->id=%d peer->fd=%d\n", 233 s->id, s->peer->id, s->peer->fd); 234 s->peer->peer = 0; 235 // tweak to avoid deadlock 236 if (s->peer->close == local_socket_close) { 237 local_socket_close_locked(s->peer); 238 } else { 239 s->peer->close(s->peer); 240 } 241 s->peer = 0; 242 } 243 244 /* If we are already closing, or if there are no 245 ** pending packets, destroy immediately 246 */ 247 if (s->closing || s->pkt_first == NULL) { 248 int id = s->id; 249 local_socket_destroy(s); 250 D("LS(%d): closed\n", id); 251 return; 252 } 253 254 /* otherwise, put on the closing list 255 */ 256 D("LS(%d): closing\n", s->id); 257 s->closing = 1; 258 fdevent_del(&s->fde, FDE_READ); 259 remove_socket(s); 260 D("LS(%d): put on socket_closing_list fd=%d\n", s->id, s->fd); 261 insert_local_socket(s, &local_socket_closing_list); 262} 263 264static void local_socket_event_func(int fd, unsigned ev, void *_s) 265{ 266 asocket *s = _s; 267 268 D("LS(%d): event_func(fd=%d(==%d), ev=%04x)\n", s->id, s->fd, fd, ev); 269 270 /* put the FDE_WRITE processing before the FDE_READ 271 ** in order to simplify the code. 272 */ 273 if(ev & FDE_WRITE){ 274 apacket *p; 275 276 while((p = s->pkt_first) != 0) { 277 while(p->len > 0) { 278 int r = adb_write(fd, p->ptr, p->len); 279 if(r > 0) { 280 p->ptr += r; 281 p->len -= r; 282 continue; 283 } 284 if(r < 0) { 285 /* returning here is ok because FDE_READ will 286 ** be processed in the next iteration loop 287 */ 288 if(errno == EAGAIN) return; 289 if(errno == EINTR) continue; 290 } 291 s->close(s); 292 return; 293 } 294 295 if(p->len == 0) { 296 s->pkt_first = p->next; 297 if(s->pkt_first == 0) s->pkt_last = 0; 298 put_apacket(p); 299 } 300 } 301 302 /* if we sent the last packet of a closing socket, 303 ** we can now destroy it. 304 */ 305 if (s->closing) { 306 s->close(s); 307 return; 308 } 309 310 /* no more packets queued, so we can ignore 311 ** writable events again and tell our peer 312 ** to resume writing 313 */ 314 fdevent_del(&s->fde, FDE_WRITE); 315 s->peer->ready(s->peer); 316 } 317 318 319 if(ev & FDE_READ){ 320 apacket *p = get_apacket(); 321 unsigned char *x = p->data; 322 size_t avail = MAX_PAYLOAD; 323 int r; 324 int is_eof = 0; 325 326 while(avail > 0) { 327 r = adb_read(fd, x, avail); 328 D("LS(%d): post adb_read(fd=%d,...) r=%d (errno=%d) avail=%d\n", s->id, s->fd, r, r<0?errno:0, avail); 329 if(r > 0) { 330 avail -= r; 331 x += r; 332 continue; 333 } 334 if(r < 0) { 335 if(errno == EAGAIN) break; 336 if(errno == EINTR) continue; 337 } 338 339 /* r = 0 or unhandled error */ 340 is_eof = 1; 341 break; 342 } 343 D("LS(%d): fd=%d post avail loop. r=%d is_eof=%d forced_eof=%d\n", 344 s->id, s->fd, r, is_eof, s->fde.force_eof); 345 if((avail == MAX_PAYLOAD) || (s->peer == 0)) { 346 put_apacket(p); 347 } else { 348 p->len = MAX_PAYLOAD - avail; 349 350 r = s->peer->enqueue(s->peer, p); 351 D("LS(%d): fd=%d post peer->enqueue(). r=%d\n", s->id, s->fd, r); 352 353 if(r < 0) { 354 /* error return means they closed us as a side-effect 355 ** and we must return immediately. 356 ** 357 ** note that if we still have buffered packets, the 358 ** socket will be placed on the closing socket list. 359 ** this handler function will be called again 360 ** to process FDE_WRITE events. 361 */ 362 return; 363 } 364 365 if(r > 0) { 366 /* if the remote cannot accept further events, 367 ** we disable notification of READs. They'll 368 ** be enabled again when we get a call to ready() 369 */ 370 fdevent_del(&s->fde, FDE_READ); 371 } 372 } 373 /* Don't allow a forced eof if data is still there */ 374 if((s->fde.force_eof && !r) || is_eof) { 375 s->close(s); 376 } 377 } 378 379 if(ev & FDE_ERROR){ 380 /* this should be caught be the next read or write 381 ** catching it here means we may skip the last few 382 ** bytes of readable data. 383 */ 384// s->close(s); 385 D("LS(%d): FDE_ERROR (fd=%d)\n", s->id, s->fd); 386 387 return; 388 } 389} 390 391asocket *create_local_socket(int fd) 392{ 393 asocket *s = calloc(1, sizeof(asocket)); 394 if (s == NULL) fatal("cannot allocate socket"); 395 s->fd = fd; 396 s->enqueue = local_socket_enqueue; 397 s->ready = local_socket_ready; 398 s->close = local_socket_close; 399 install_local_socket(s); 400 401 fdevent_install(&s->fde, fd, local_socket_event_func, s); 402/* fdevent_add(&s->fde, FDE_ERROR); */ 403 //fprintf(stderr, "Created local socket in create_local_socket \n"); 404 D("LS(%d): created (fd=%d)\n", s->id, s->fd); 405 return s; 406} 407 408asocket *create_local_service_socket(const char *name) 409{ 410 asocket *s; 411 int fd; 412 413#if !ADB_HOST 414 if (!strcmp(name,"jdwp")) { 415 return create_jdwp_service_socket(); 416 } 417 if (!strcmp(name,"track-jdwp")) { 418 return create_jdwp_tracker_service_socket(); 419 } 420#endif 421 fd = service_to_fd(name); 422 if(fd < 0) return 0; 423 424 s = create_local_socket(fd); 425 D("LS(%d): bound to '%s' via %d\n", s->id, name, fd); 426 return s; 427} 428 429#if ADB_HOST 430static asocket *create_host_service_socket(const char *name, const char* serial) 431{ 432 asocket *s; 433 434 s = host_service_to_socket(name, serial); 435 436 if (s != NULL) { 437 D("LS(%d) bound to '%s'\n", s->id, name); 438 return s; 439 } 440 441 return s; 442} 443#endif /* ADB_HOST */ 444 445/* a Remote socket is used to send/receive data to/from a given transport object 446** it needs to be closed when the transport is forcibly destroyed by the user 447*/ 448typedef struct aremotesocket { 449 asocket socket; 450 adisconnect disconnect; 451} aremotesocket; 452 453static int remote_socket_enqueue(asocket *s, apacket *p) 454{ 455 D("entered remote_socket_enqueue RS(%d) WRITE fd=%d peer.fd=%d\n", 456 s->id, s->fd, s->peer->fd); 457 p->msg.command = A_WRTE; 458 p->msg.arg0 = s->peer->id; 459 p->msg.arg1 = s->id; 460 p->msg.data_length = p->len; 461 send_packet(p, s->transport); 462 return 1; 463} 464 465static void remote_socket_ready(asocket *s) 466{ 467 D("entered remote_socket_ready RS(%d) OKAY fd=%d peer.fd=%d\n", 468 s->id, s->fd, s->peer->fd); 469 apacket *p = get_apacket(); 470 p->msg.command = A_OKAY; 471 p->msg.arg0 = s->peer->id; 472 p->msg.arg1 = s->id; 473 send_packet(p, s->transport); 474} 475 476static void remote_socket_close(asocket *s) 477{ 478 D("entered remote_socket_close RS(%d) CLOSE fd=%d peer->fd=%d\n", 479 s->id, s->fd, s->peer?s->peer->fd:-1); 480 apacket *p = get_apacket(); 481 p->msg.command = A_CLSE; 482 if(s->peer) { 483 p->msg.arg0 = s->peer->id; 484 s->peer->peer = 0; 485 D("RS(%d) peer->close()ing peer->id=%d peer->fd=%d\n", 486 s->id, s->peer->id, s->peer->fd); 487 s->peer->close(s->peer); 488 } 489 p->msg.arg1 = s->id; 490 send_packet(p, s->transport); 491 D("RS(%d): closed\n", s->id); 492 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect ); 493 free(s); 494} 495 496static void remote_socket_disconnect(void* _s, atransport* t) 497{ 498 asocket* s = _s; 499 asocket* peer = s->peer; 500 501 D("remote_socket_disconnect RS(%d)\n", s->id); 502 if (peer) { 503 peer->peer = NULL; 504 peer->close(peer); 505 } 506 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect ); 507 free(s); 508} 509 510asocket *create_remote_socket(unsigned id, atransport *t) 511{ 512 asocket *s = calloc(1, sizeof(aremotesocket)); 513 adisconnect* dis = &((aremotesocket*)s)->disconnect; 514 515 if (s == NULL) fatal("cannot allocate socket"); 516 s->id = id; 517 s->enqueue = remote_socket_enqueue; 518 s->ready = remote_socket_ready; 519 s->close = remote_socket_close; 520 s->transport = t; 521 522 dis->func = remote_socket_disconnect; 523 dis->opaque = s; 524 add_transport_disconnect( t, dis ); 525 D("RS(%d): created\n", s->id); 526 return s; 527} 528 529void connect_to_remote(asocket *s, const char *destination) 530{ 531 D("Connect_to_remote call RS(%d) fd=%d\n", s->id, s->fd); 532 apacket *p = get_apacket(); 533 int len = strlen(destination) + 1; 534 535#if ADB_HOST 536 /* special case commands that cause the remote daemon to terminate */ 537 if (!strcmp(destination, "root:")) { 538 D("connect_to_remote setting kick_on_close for %s\n", destination); 539 s->kick_on_close = 1; 540 } 541#endif 542 543 if(len > (MAX_PAYLOAD-1)) { 544 fatal("destination oversized"); 545 } 546 547 D("LS(%d): connect('%s')\n", s->id, destination); 548 p->msg.command = A_OPEN; 549 p->msg.arg0 = s->id; 550 p->msg.data_length = len; 551 strcpy((char*) p->data, destination); 552 send_packet(p, s->transport); 553} 554 555 556/* this is used by magic sockets to rig local sockets to 557 send the go-ahead message when they connect */ 558static void local_socket_ready_notify(asocket *s) 559{ 560 s->ready = local_socket_ready; 561 s->close = local_socket_close; 562 adb_write(s->fd, "OKAY", 4); 563 s->ready(s); 564} 565 566/* this is used by magic sockets to rig local sockets to 567 send the failure message if they are closed before 568 connected (to avoid closing them without a status message) */ 569static void local_socket_close_notify(asocket *s) 570{ 571 s->ready = local_socket_ready; 572 s->close = local_socket_close; 573 sendfailmsg(s->fd, "closed"); 574 s->close(s); 575} 576 577unsigned unhex(unsigned char *s, int len) 578{ 579 unsigned n = 0, c; 580 581 while(len-- > 0) { 582 switch((c = *s++)) { 583 case '0': case '1': case '2': 584 case '3': case '4': case '5': 585 case '6': case '7': case '8': 586 case '9': 587 c -= '0'; 588 break; 589 case 'a': case 'b': case 'c': 590 case 'd': case 'e': case 'f': 591 c = c - 'a' + 10; 592 break; 593 case 'A': case 'B': case 'C': 594 case 'D': case 'E': case 'F': 595 c = c - 'A' + 10; 596 break; 597 default: 598 return 0xffffffff; 599 } 600 601 n = (n << 4) | c; 602 } 603 604 return n; 605} 606 607/* skip_host_serial return the position in a string 608 skipping over the 'serial' parameter in the ADB protocol, 609 where parameter string may be a host:port string containing 610 the protocol delimiter (colon). */ 611char *skip_host_serial(char *service) { 612 char *first_colon, *serial_end; 613 614 first_colon = strchr(service, ':'); 615 if (!first_colon) { 616 /* No colon in service string. */ 617 return NULL; 618 } 619 serial_end = first_colon; 620 if (isdigit(serial_end[1])) { 621 serial_end++; 622 while ((*serial_end) && isdigit(*serial_end)) { 623 serial_end++; 624 } 625 if ((*serial_end) != ':') { 626 // Something other than numbers was found, reset the end. 627 serial_end = first_colon; 628 } 629 } 630 return serial_end; 631} 632 633static int smart_socket_enqueue(asocket *s, apacket *p) 634{ 635 unsigned len; 636#if ADB_HOST 637 char *service = NULL; 638 char* serial = NULL; 639 transport_type ttype = kTransportAny; 640#endif 641 642 D("SS(%d): enqueue %d\n", s->id, p->len); 643 644 if(s->pkt_first == 0) { 645 s->pkt_first = p; 646 s->pkt_last = p; 647 } else { 648 if((s->pkt_first->len + p->len) > MAX_PAYLOAD) { 649 D("SS(%d): overflow\n", s->id); 650 put_apacket(p); 651 goto fail; 652 } 653 654 memcpy(s->pkt_first->data + s->pkt_first->len, 655 p->data, p->len); 656 s->pkt_first->len += p->len; 657 put_apacket(p); 658 659 p = s->pkt_first; 660 } 661 662 /* don't bother if we can't decode the length */ 663 if(p->len < 4) return 0; 664 665 len = unhex(p->data, 4); 666 if((len < 1) || (len > 1024)) { 667 D("SS(%d): bad size (%d)\n", s->id, len); 668 goto fail; 669 } 670 671 D("SS(%d): len is %d\n", s->id, len ); 672 /* can't do anything until we have the full header */ 673 if((len + 4) > p->len) { 674 D("SS(%d): waiting for %d more bytes\n", s->id, len+4 - p->len); 675 return 0; 676 } 677 678 p->data[len + 4] = 0; 679 680 D("SS(%d): '%s'\n", s->id, (char*) (p->data + 4)); 681 682#if ADB_HOST 683 service = (char *)p->data + 4; 684 if(!strncmp(service, "host-serial:", strlen("host-serial:"))) { 685 char* serial_end; 686 service += strlen("host-serial:"); 687 688 // serial number should follow "host:" and could be a host:port string. 689 serial_end = skip_host_serial(service); 690 if (serial_end) { 691 *serial_end = 0; // terminate string 692 serial = service; 693 service = serial_end + 1; 694 } 695 } else if (!strncmp(service, "host-usb:", strlen("host-usb:"))) { 696 ttype = kTransportUsb; 697 service += strlen("host-usb:"); 698 } else if (!strncmp(service, "host-local:", strlen("host-local:"))) { 699 ttype = kTransportLocal; 700 service += strlen("host-local:"); 701 } else if (!strncmp(service, "host:", strlen("host:"))) { 702 ttype = kTransportAny; 703 service += strlen("host:"); 704 } else { 705 service = NULL; 706 } 707 708 if (service) { 709 asocket *s2; 710 711 /* some requests are handled immediately -- in that 712 ** case the handle_host_request() routine has sent 713 ** the OKAY or FAIL message and all we have to do 714 ** is clean up. 715 */ 716 if(handle_host_request(service, ttype, serial, s->peer->fd, s) == 0) { 717 /* XXX fail message? */ 718 D( "SS(%d): handled host service '%s'\n", s->id, service ); 719 goto fail; 720 } 721 if (!strncmp(service, "transport", strlen("transport"))) { 722 D( "SS(%d): okay transport\n", s->id ); 723 p->len = 0; 724 return 0; 725 } 726 727 /* try to find a local service with this name. 728 ** if no such service exists, we'll fail out 729 ** and tear down here. 730 */ 731 s2 = create_host_service_socket(service, serial); 732 if(s2 == 0) { 733 D( "SS(%d): couldn't create host service '%s'\n", s->id, service ); 734 sendfailmsg(s->peer->fd, "unknown host service"); 735 goto fail; 736 } 737 738 /* we've connected to a local host service, 739 ** so we make our peer back into a regular 740 ** local socket and bind it to the new local 741 ** service socket, acknowledge the successful 742 ** connection, and close this smart socket now 743 ** that its work is done. 744 */ 745 adb_write(s->peer->fd, "OKAY", 4); 746 747 s->peer->ready = local_socket_ready; 748 s->peer->close = local_socket_close; 749 s->peer->peer = s2; 750 s2->peer = s->peer; 751 s->peer = 0; 752 D( "SS(%d): okay\n", s->id ); 753 s->close(s); 754 755 /* initial state is "ready" */ 756 s2->ready(s2); 757 return 0; 758 } 759#else /* !ADB_HOST */ 760 if (s->transport == NULL) { 761 char* error_string = "unknown failure"; 762 s->transport = acquire_one_transport (CS_ANY, 763 kTransportAny, NULL, &error_string); 764 765 if (s->transport == NULL) { 766 sendfailmsg(s->peer->fd, error_string); 767 goto fail; 768 } 769 } 770#endif 771 772 if(!(s->transport) || (s->transport->connection_state == CS_OFFLINE)) { 773 /* if there's no remote we fail the connection 774 ** right here and terminate it 775 */ 776 sendfailmsg(s->peer->fd, "device offline (x)"); 777 goto fail; 778 } 779 780 781 /* instrument our peer to pass the success or fail 782 ** message back once it connects or closes, then 783 ** detach from it, request the connection, and 784 ** tear down 785 */ 786 s->peer->ready = local_socket_ready_notify; 787 s->peer->close = local_socket_close_notify; 788 s->peer->peer = 0; 789 /* give him our transport and upref it */ 790 s->peer->transport = s->transport; 791 792 connect_to_remote(s->peer, (char*) (p->data + 4)); 793 s->peer = 0; 794 s->close(s); 795 return 1; 796 797fail: 798 /* we're going to close our peer as a side-effect, so 799 ** return -1 to signal that state to the local socket 800 ** who is enqueueing against us 801 */ 802 s->close(s); 803 return -1; 804} 805 806static void smart_socket_ready(asocket *s) 807{ 808 D("SS(%d): ready\n", s->id); 809} 810 811static void smart_socket_close(asocket *s) 812{ 813 D("SS(%d): closed\n", s->id); 814 if(s->pkt_first){ 815 put_apacket(s->pkt_first); 816 } 817 if(s->peer) { 818 s->peer->peer = 0; 819 s->peer->close(s->peer); 820 s->peer = 0; 821 } 822 free(s); 823} 824 825asocket *create_smart_socket(void (*action_cb)(asocket *s, const char *act)) 826{ 827 D("Creating smart socket \n"); 828 asocket *s = calloc(1, sizeof(asocket)); 829 if (s == NULL) fatal("cannot allocate socket"); 830 s->enqueue = smart_socket_enqueue; 831 s->ready = smart_socket_ready; 832 s->close = smart_socket_close; 833 s->extra = action_cb; 834 835 D("SS(%d): created %p\n", s->id, action_cb); 836 return s; 837} 838 839void smart_socket_action(asocket *s, const char *act) 840{ 841 842} 843 844void connect_to_smartsocket(asocket *s) 845{ 846 D("Connecting to smart socket \n"); 847 asocket *ss = create_smart_socket(smart_socket_action); 848 s->peer = ss; 849 ss->peer = s; 850 s->ready(s); 851} 852