sockets.c revision e83b7cf8f1bad5b334b6352d3b850d8555530a9a
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 adb_mutex_lock(&socket_list_lock); 194 local_socket_close_locked(s); 195 adb_mutex_unlock(&socket_list_lock); 196} 197 198// be sure to hold the socket list lock when calling this 199static void local_socket_destroy(asocket *s) 200{ 201 apacket *p, *n; 202 D("LS(%d): destroying fde.fd=%d\n", s->id, s->fde.fd); 203 204 /* IMPORTANT: the remove closes the fd 205 ** that belongs to this socket 206 */ 207 fdevent_remove(&s->fde); 208 209 /* dispose of any unwritten data */ 210 for(p = s->pkt_first; p; p = n) { 211 D("LS(%d): discarding %d bytes\n", s->id, p->len); 212 n = p->next; 213 put_apacket(p); 214 } 215 remove_socket(s); 216 free(s); 217} 218 219 220static void local_socket_close_locked(asocket *s) 221{ 222 D("entered. LS(%d) fd=%d\n", s->id, s->fd); 223 if(s->peer) { 224 D("LS(%d): closing peer. peer->id=%d peer->fd=%d\n", 225 s->id, s->peer->id, s->peer->fd); 226 s->peer->peer = 0; 227 // tweak to avoid deadlock 228 if (s->peer->close == local_socket_close) { 229 local_socket_close_locked(s->peer); 230 } else { 231 s->peer->close(s->peer); 232 } 233 s->peer = 0; 234 } 235 236 /* If we are already closing, or if there are no 237 ** pending packets, destroy immediately 238 */ 239 if (s->closing || s->pkt_first == NULL) { 240 int id = s->id; 241 local_socket_destroy(s); 242 D("LS(%d): closed\n", id); 243 return; 244 } 245 246 /* otherwise, put on the closing list 247 */ 248 D("LS(%d): closing\n", s->id); 249 s->closing = 1; 250 fdevent_del(&s->fde, FDE_READ); 251 remove_socket(s); 252 D("LS(%d): put on socket_closing_list fd=%d\n", s->id, s->fd); 253 insert_local_socket(s, &local_socket_closing_list); 254} 255 256static void local_socket_event_func(int fd, unsigned ev, void *_s) 257{ 258 asocket *s = _s; 259 260 D("LS(%d): event_func(fd=%d(==%d), ev=%04x)\n", s->id, s->fd, fd, ev); 261 262 /* put the FDE_WRITE processing before the FDE_READ 263 ** in order to simplify the code. 264 */ 265 if(ev & FDE_WRITE){ 266 apacket *p; 267 268 while((p = s->pkt_first) != 0) { 269 while(p->len > 0) { 270 int r = adb_write(fd, p->ptr, p->len); 271 if(r > 0) { 272 p->ptr += r; 273 p->len -= r; 274 continue; 275 } 276 if(r < 0) { 277 /* returning here is ok because FDE_READ will 278 ** be processed in the next iteration loop 279 */ 280 if(errno == EAGAIN) return; 281 if(errno == EINTR) continue; 282 } 283 D(" closing after write because r=%d and errno is %d\n", r, errno); 284 s->close(s); 285 return; 286 } 287 288 if(p->len == 0) { 289 s->pkt_first = p->next; 290 if(s->pkt_first == 0) s->pkt_last = 0; 291 put_apacket(p); 292 } 293 } 294 295 /* if we sent the last packet of a closing socket, 296 ** we can now destroy it. 297 */ 298 if (s->closing) { 299 D(" closing because 'closing' is set after write\n"); 300 s->close(s); 301 return; 302 } 303 304 /* no more packets queued, so we can ignore 305 ** writable events again and tell our peer 306 ** to resume writing 307 */ 308 fdevent_del(&s->fde, FDE_WRITE); 309 s->peer->ready(s->peer); 310 } 311 312 313 if(ev & FDE_READ){ 314 apacket *p = get_apacket(); 315 unsigned char *x = p->data; 316 size_t avail = MAX_PAYLOAD; 317 int r; 318 int is_eof = 0; 319 320 while(avail > 0) { 321 r = adb_read(fd, x, avail); 322 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); 323 if(r > 0) { 324 avail -= r; 325 x += r; 326 continue; 327 } 328 if(r < 0) { 329 if(errno == EAGAIN) break; 330 if(errno == EINTR) continue; 331 } 332 333 /* r = 0 or unhandled error */ 334 is_eof = 1; 335 break; 336 } 337 D("LS(%d): fd=%d post avail loop. r=%d is_eof=%d forced_eof=%d\n", 338 s->id, s->fd, r, is_eof, s->fde.force_eof); 339 if((avail == MAX_PAYLOAD) || (s->peer == 0)) { 340 put_apacket(p); 341 } else { 342 p->len = MAX_PAYLOAD - avail; 343 344 r = s->peer->enqueue(s->peer, p); 345 D("LS(%d): fd=%d post peer->enqueue(). r=%d\n", s->id, s->fd, r); 346 347 if(r < 0) { 348 /* error return means they closed us as a side-effect 349 ** and we must return immediately. 350 ** 351 ** note that if we still have buffered packets, the 352 ** socket will be placed on the closing socket list. 353 ** this handler function will be called again 354 ** to process FDE_WRITE events. 355 */ 356 return; 357 } 358 359 if(r > 0) { 360 /* if the remote cannot accept further events, 361 ** we disable notification of READs. They'll 362 ** be enabled again when we get a call to ready() 363 */ 364 fdevent_del(&s->fde, FDE_READ); 365 } 366 } 367 /* Don't allow a forced eof if data is still there */ 368 if((s->fde.force_eof && !r) || is_eof) { 369 D(" closing because is_eof=%d r=%d s->fde.force_eof=%d\n", is_eof, r, s->fde.force_eof); 370 s->close(s); 371 } 372 } 373 374 if(ev & FDE_ERROR){ 375 /* this should be caught be the next read or write 376 ** catching it here means we may skip the last few 377 ** bytes of readable data. 378 */ 379// s->close(s); 380 D("LS(%d): FDE_ERROR (fd=%d)\n", s->id, s->fd); 381 382 return; 383 } 384} 385 386asocket *create_local_socket(int fd) 387{ 388 asocket *s = calloc(1, sizeof(asocket)); 389 if (s == NULL) fatal("cannot allocate socket"); 390 s->fd = fd; 391 s->enqueue = local_socket_enqueue; 392 s->ready = local_socket_ready; 393 s->close = local_socket_close; 394 install_local_socket(s); 395 396 fdevent_install(&s->fde, fd, local_socket_event_func, s); 397/* fdevent_add(&s->fde, FDE_ERROR); */ 398 //fprintf(stderr, "Created local socket in create_local_socket \n"); 399 D("LS(%d): created (fd=%d)\n", s->id, s->fd); 400 return s; 401} 402 403asocket *create_local_service_socket(const char *name) 404{ 405 asocket *s; 406 int fd; 407 408 fd = service_to_fd(name); 409 if(fd < 0) return 0; 410 411 s = create_local_socket(fd); 412 D("LS(%d): bound to '%s' via %d\n", s->id, name, fd); 413 return s; 414} 415 416#if ADB_HOST 417static asocket *create_host_service_socket(const char *name, const char* serial) 418{ 419 asocket *s; 420 421 s = host_service_to_socket(name, serial); 422 423 if (s != NULL) { 424 D("LS(%d) bound to '%s'\n", s->id, name); 425 return s; 426 } 427 428 return s; 429} 430#endif /* ADB_HOST */ 431 432/* a Remote socket is used to send/receive data to/from a given transport object 433** it needs to be closed when the transport is forcibly destroyed by the user 434*/ 435typedef struct aremotesocket { 436 asocket socket; 437 adisconnect disconnect; 438} aremotesocket; 439 440static int remote_socket_enqueue(asocket *s, apacket *p) 441{ 442 D("entered remote_socket_enqueue RS(%d) WRITE fd=%d peer.fd=%d\n", 443 s->id, s->fd, s->peer->fd); 444 p->msg.command = A_WRTE; 445 p->msg.arg0 = s->peer->id; 446 p->msg.arg1 = s->id; 447 p->msg.data_length = p->len; 448 send_packet(p, s->transport); 449 return 1; 450} 451 452static void remote_socket_ready(asocket *s) 453{ 454 D("entered remote_socket_ready RS(%d) OKAY fd=%d peer.fd=%d\n", 455 s->id, s->fd, s->peer->fd); 456 apacket *p = get_apacket(); 457 p->msg.command = A_OKAY; 458 p->msg.arg0 = s->peer->id; 459 p->msg.arg1 = s->id; 460 send_packet(p, s->transport); 461} 462 463static void remote_socket_close(asocket *s) 464{ 465 D("entered remote_socket_close RS(%d) CLOSE fd=%d peer->fd=%d\n", 466 s->id, s->fd, s->peer?s->peer->fd:-1); 467 apacket *p = get_apacket(); 468 p->msg.command = A_CLSE; 469 if(s->peer) { 470 p->msg.arg0 = s->peer->id; 471 s->peer->peer = 0; 472 D("RS(%d) peer->close()ing peer->id=%d peer->fd=%d\n", 473 s->id, s->peer->id, s->peer->fd); 474 s->peer->close(s->peer); 475 } 476 p->msg.arg1 = s->id; 477 send_packet(p, s->transport); 478 D("RS(%d): closed\n", s->id); 479 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect ); 480 free(s); 481} 482 483static void remote_socket_disconnect(void* _s, atransport* t) 484{ 485 asocket* s = _s; 486 asocket* peer = s->peer; 487 488 D("remote_socket_disconnect RS(%d)\n", s->id); 489 if (peer) { 490 peer->peer = NULL; 491 peer->close(peer); 492 } 493 remove_transport_disconnect( s->transport, &((aremotesocket*)s)->disconnect ); 494 free(s); 495} 496 497asocket *create_remote_socket(unsigned id, atransport *t) 498{ 499 asocket *s = calloc(1, sizeof(aremotesocket)); 500 adisconnect* dis = &((aremotesocket*)s)->disconnect; 501 502 if (s == NULL) fatal("cannot allocate socket"); 503 s->id = id; 504 s->enqueue = remote_socket_enqueue; 505 s->ready = remote_socket_ready; 506 s->close = remote_socket_close; 507 s->transport = t; 508 509 dis->func = remote_socket_disconnect; 510 dis->opaque = s; 511 add_transport_disconnect( t, dis ); 512 D("RS(%d): created\n", s->id); 513 return s; 514} 515 516void connect_to_remote(asocket *s, const char *destination) 517{ 518 D("Connect_to_remote call RS(%d) fd=%d\n", s->id, s->fd); 519 apacket *p = get_apacket(); 520 int len = strlen(destination) + 1; 521 522 if(len > (MAX_PAYLOAD-1)) { 523 fatal("destination oversized"); 524 } 525 526 D("LS(%d): connect('%s')\n", s->id, destination); 527 p->msg.command = A_OPEN; 528 p->msg.arg0 = s->id; 529 p->msg.data_length = len; 530 strcpy((char*) p->data, destination); 531 send_packet(p, s->transport); 532} 533 534 535/* this is used by magic sockets to rig local sockets to 536 send the go-ahead message when they connect */ 537static void local_socket_ready_notify(asocket *s) 538{ 539 s->ready = local_socket_ready; 540 s->close = local_socket_close; 541 adb_write(s->fd, "OKAY", 4); 542 s->ready(s); 543} 544 545/* this is used by magic sockets to rig local sockets to 546 send the failure message if they are closed before 547 connected (to avoid closing them without a status message) */ 548static void local_socket_close_notify(asocket *s) 549{ 550 s->ready = local_socket_ready; 551 s->close = local_socket_close; 552 sendfailmsg(s->fd, "closed"); 553 s->close(s); 554} 555 556unsigned unhex(unsigned char *s, int len) 557{ 558 unsigned n = 0, c; 559 560 while(len-- > 0) { 561 switch((c = *s++)) { 562 case '0': case '1': case '2': 563 case '3': case '4': case '5': 564 case '6': case '7': case '8': 565 case '9': 566 c -= '0'; 567 break; 568 case 'a': case 'b': case 'c': 569 case 'd': case 'e': case 'f': 570 c = c - 'a' + 10; 571 break; 572 case 'A': case 'B': case 'C': 573 case 'D': case 'E': case 'F': 574 c = c - 'A' + 10; 575 break; 576 default: 577 return 0xffffffff; 578 } 579 580 n = (n << 4) | c; 581 } 582 583 return n; 584} 585 586/* skip_host_serial return the position in a string 587 skipping over the 'serial' parameter in the ADB protocol, 588 where parameter string may be a host:port string containing 589 the protocol delimiter (colon). */ 590char *skip_host_serial(char *service) { 591 char *first_colon, *serial_end; 592 593 first_colon = strchr(service, ':'); 594 if (!first_colon) { 595 /* No colon in service string. */ 596 return NULL; 597 } 598 serial_end = first_colon; 599 if (isdigit(serial_end[1])) { 600 serial_end++; 601 while ((*serial_end) && isdigit(*serial_end)) { 602 serial_end++; 603 } 604 if ((*serial_end) != ':') { 605 // Something other than numbers was found, reset the end. 606 serial_end = first_colon; 607 } 608 } 609 return serial_end; 610} 611 612static int smart_socket_enqueue(asocket *s, apacket *p) 613{ 614 unsigned len; 615#if ADB_HOST 616 char *service = NULL; 617 char* serial = NULL; 618 transport_type ttype = kTransportAny; 619#endif 620 621 D("SS(%d): enqueue %d\n", s->id, p->len); 622 623 if(s->pkt_first == 0) { 624 s->pkt_first = p; 625 s->pkt_last = p; 626 } else { 627 if((s->pkt_first->len + p->len) > MAX_PAYLOAD) { 628 D("SS(%d): overflow\n", s->id); 629 put_apacket(p); 630 goto fail; 631 } 632 633 memcpy(s->pkt_first->data + s->pkt_first->len, 634 p->data, p->len); 635 s->pkt_first->len += p->len; 636 put_apacket(p); 637 638 p = s->pkt_first; 639 } 640 641 /* don't bother if we can't decode the length */ 642 if(p->len < 4) return 0; 643 644 len = unhex(p->data, 4); 645 if((len < 1) || (len > 1024)) { 646 D("SS(%d): bad size (%d)\n", s->id, len); 647 goto fail; 648 } 649 650 D("SS(%d): len is %d\n", s->id, len ); 651 /* can't do anything until we have the full header */ 652 if((len + 4) > p->len) { 653 D("SS(%d): waiting for %d more bytes\n", s->id, len+4 - p->len); 654 return 0; 655 } 656 657 p->data[len + 4] = 0; 658 659 D("SS(%d): '%s'\n", s->id, (char*) (p->data + 4)); 660 661#if ADB_HOST 662 service = (char *)p->data + 4; 663 if(!strncmp(service, "host-serial:", strlen("host-serial:"))) { 664 char* serial_end; 665 service += strlen("host-serial:"); 666 667 // serial number should follow "host:" and could be a host:port string. 668 serial_end = skip_host_serial(service); 669 if (serial_end) { 670 *serial_end = 0; // terminate string 671 serial = service; 672 service = serial_end + 1; 673 } 674 } else if (!strncmp(service, "host-usb:", strlen("host-usb:"))) { 675 ttype = kTransportUsb; 676 service += strlen("host-usb:"); 677 } else if (!strncmp(service, "host-local:", strlen("host-local:"))) { 678 ttype = kTransportLocal; 679 service += strlen("host-local:"); 680 } else if (!strncmp(service, "host:", strlen("host:"))) { 681 ttype = kTransportAny; 682 service += strlen("host:"); 683 } else { 684 service = NULL; 685 } 686 687 if (service) { 688 asocket *s2; 689 690 /* some requests are handled immediately -- in that 691 ** case the handle_host_request() routine has sent 692 ** the OKAY or FAIL message and all we have to do 693 ** is clean up. 694 */ 695 if(handle_host_request(service, ttype, serial, s->peer->fd, s) == 0) { 696 /* XXX fail message? */ 697 D( "SS(%d): handled host service '%s'\n", s->id, service ); 698 goto fail; 699 } 700 if (!strncmp(service, "transport", strlen("transport"))) { 701 D( "SS(%d): okay transport\n", s->id ); 702 p->len = 0; 703 return 0; 704 } 705 706 /* try to find a local service with this name. 707 ** if no such service exists, we'll fail out 708 ** and tear down here. 709 */ 710 s2 = create_host_service_socket(service, serial); 711 if(s2 == 0) { 712 D( "SS(%d): couldn't create host service '%s'\n", s->id, service ); 713 sendfailmsg(s->peer->fd, "unknown host service"); 714 goto fail; 715 } 716 717 /* we've connected to a local host service, 718 ** so we make our peer back into a regular 719 ** local socket and bind it to the new local 720 ** service socket, acknowledge the successful 721 ** connection, and close this smart socket now 722 ** that its work is done. 723 */ 724 adb_write(s->peer->fd, "OKAY", 4); 725 726 s->peer->ready = local_socket_ready; 727 s->peer->close = local_socket_close; 728 s->peer->peer = s2; 729 s2->peer = s->peer; 730 s->peer = 0; 731 D( "SS(%d): okay\n", s->id ); 732 s->close(s); 733 734 /* initial state is "ready" */ 735 s2->ready(s2); 736 return 0; 737 } 738#else /* !ADB_HOST */ 739 if (s->transport == NULL) { 740 char* error_string = "unknown failure"; 741 s->transport = acquire_one_transport (CS_ANY, 742 kTransportAny, NULL, &error_string); 743 744 if (s->transport == NULL) { 745 sendfailmsg(s->peer->fd, error_string); 746 goto fail; 747 } 748 } 749#endif 750 751 if(!(s->transport) || (s->transport->connection_state == CS_OFFLINE)) { 752 /* if there's no remote we fail the connection 753 ** right here and terminate it 754 */ 755 sendfailmsg(s->peer->fd, "device offline (x)"); 756 goto fail; 757 } 758 759 760 /* instrument our peer to pass the success or fail 761 ** message back once it connects or closes, then 762 ** detach from it, request the connection, and 763 ** tear down 764 */ 765 s->peer->ready = local_socket_ready_notify; 766 s->peer->close = local_socket_close_notify; 767 s->peer->peer = 0; 768 /* give him our transport and upref it */ 769 s->peer->transport = s->transport; 770 771 connect_to_remote(s->peer, (char*) (p->data + 4)); 772 s->peer = 0; 773 s->close(s); 774 return 1; 775 776fail: 777 /* we're going to close our peer as a side-effect, so 778 ** return -1 to signal that state to the local socket 779 ** who is enqueueing against us 780 */ 781 s->close(s); 782 return -1; 783} 784 785static void smart_socket_ready(asocket *s) 786{ 787 D("SS(%d): ready\n", s->id); 788} 789 790static void smart_socket_close(asocket *s) 791{ 792 D("SS(%d): closed\n", s->id); 793 if(s->pkt_first){ 794 put_apacket(s->pkt_first); 795 } 796 if(s->peer) { 797 s->peer->peer = 0; 798 s->peer->close(s->peer); 799 s->peer = 0; 800 } 801 free(s); 802} 803 804asocket *create_smart_socket(void (*action_cb)(asocket *s, const char *act)) 805{ 806 D("Creating smart socket \n"); 807 asocket *s = calloc(1, sizeof(asocket)); 808 if (s == NULL) fatal("cannot allocate socket"); 809 s->enqueue = smart_socket_enqueue; 810 s->ready = smart_socket_ready; 811 s->close = smart_socket_close; 812 s->extra = action_cb; 813 814 D("SS(%d): created %p\n", s->id, action_cb); 815 return s; 816} 817 818void smart_socket_action(asocket *s, const char *act) 819{ 820 821} 822 823void connect_to_smartsocket(asocket *s) 824{ 825 D("Connecting to smart socket \n"); 826 asocket *ss = create_smart_socket(smart_socket_action); 827 s->peer = ss; 828 ss->peer = s; 829 s->ready(s); 830} 831