1 /* 2 3 * l1oip.c low level driver for tunneling layer 1 over IP 4 * 5 * NOTE: It is not compatible with TDMoIP nor "ISDN over IP". 6 * 7 * Author Andreas Eversberg (jolly@eversberg.eu) 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 */ 24 25 /* module parameters: 26 * type: 27 Value 1 = BRI 28 Value 2 = PRI 29 Value 3 = BRI (multi channel frame, not supported yet) 30 Value 4 = PRI (multi channel frame, not supported yet) 31 A multi channel frame reduces overhead to a single frame for all 32 b-channels, but increases delay. 33 (NOTE: Multi channel frames are not implemented yet.) 34 35 * codec: 36 Value 0 = transparent (default) 37 Value 1 = transfer ALAW 38 Value 2 = transfer ULAW 39 Value 3 = transfer generic 4 bit compression. 40 41 * ulaw: 42 0 = we use a-Law (default) 43 1 = we use u-Law 44 45 * limit: 46 limitation of B-channels to control bandwidth (1...126) 47 BRI: 1 or 2 48 PRI: 1-30, 31-126 (126, because dchannel ist not counted here) 49 Also limited ressources are used for stack, resulting in less channels. 50 It is possible to have more channels than 30 in PRI mode, this must 51 be supported by the application. 52 53 * ip: 54 byte representation of remote ip address (127.0.0.1 -> 127,0,0,1) 55 If not given or four 0, no remote address is set. 56 For multiple interfaces, concat ip addresses. (127,0,0,1,127,0,0,1) 57 58 * port: 59 port number (local interface) 60 If not given or 0, port 931 is used for fist instance, 932 for next... 61 For multiple interfaces, different ports must be given. 62 63 * remoteport: 64 port number (remote interface) 65 If not given or 0, remote port equals local port 66 For multiple interfaces on equal sites, different ports must be given. 67 68 * ondemand: 69 0 = fixed (always transmit packets, even when remote side timed out) 70 1 = on demand (only transmit packets, when remote side is detected) 71 the default is 0 72 NOTE: ID must also be set for on demand. 73 74 * id: 75 optional value to identify frames. This value must be equal on both 76 peers and should be random. If omitted or 0, no ID is transmitted. 77 78 * debug: 79 NOTE: only one debug value must be given for all cards 80 enable debugging (see l1oip.h for debug options) 81 82 83 Special mISDN controls: 84 85 op = MISDN_CTRL_SETPEER* 86 p1 = bytes 0-3 : remote IP address in network order (left element first) 87 p2 = bytes 1-2 : remote port in network order (high byte first) 88 optional: 89 p2 = bytes 3-4 : local port in network order (high byte first) 90 91 op = MISDN_CTRL_UNSETPEER* 92 93 * Use l1oipctrl for comfortable setting or removing ip address. 94 (Layer 1 Over IP CTRL) 95 96 97 L1oIP-Protocol 98 -------------- 99 100 Frame Header: 101 102 7 6 5 4 3 2 1 0 103 +---------------+ 104 |Ver|T|I|Coding | 105 +---------------+ 106 | ID byte 3 * | 107 +---------------+ 108 | ID byte 2 * | 109 +---------------+ 110 | ID byte 1 * | 111 +---------------+ 112 | ID byte 0 * | 113 +---------------+ 114 |M| Channel | 115 +---------------+ 116 | Length * | 117 +---------------+ 118 | Time Base MSB | 119 +---------------+ 120 | Time Base LSB | 121 +---------------+ 122 | Data.... | 123 124 ... 125 126 | | 127 +---------------+ 128 |M| Channel | 129 +---------------+ 130 | Length * | 131 +---------------+ 132 | Time Base MSB | 133 +---------------+ 134 | Time Base LSB | 135 +---------------+ 136 | Data.... | 137 138 ... 139 140 141 * Only included in some cases. 142 143 - Ver = Version 144 If version is missmatch, the frame must be ignored. 145 146 - T = Type of interface 147 Must be 0 for S0 or 1 for E1. 148 149 - I = Id present 150 If bit is set, four ID bytes are included in frame. 151 152 - ID = Connection ID 153 Additional ID to prevent Denial of Service attacs. Also it prevents hijacking 154 connections with dynamic IP. The ID should be random and must not be 0. 155 156 - Coding = Type of codec 157 Must be 0 for no transcoding. Also for D-channel and other HDLC frames. 158 1 and 2 are reserved for explicitly use of a-LAW or u-LAW codec. 159 3 is used for generic table compressor. 160 161 - M = More channels to come. If this flag is 1, the following byte contains 162 the length of the channel data. After the data block, the next channel will 163 be defined. The flag for the last channel block (or if only one channel is 164 transmitted), must be 0 and no length is given. 165 166 - Channel = Channel number 167 0 reserved 168 1-3 channel data for S0 (3 is D-channel) 169 1-31 channel data for E1 (16 is D-channel) 170 32-127 channel data for extended E1 (16 is D-channel) 171 172 - The length is used if the M-flag is 1. It is used to find the next channel 173 inside frame. 174 NOTE: A value of 0 equals 256 bytes of data. 175 -> For larger data blocks, a single frame must be used. 176 -> For larger streams, a single frame or multiple blocks with same channel ID 177 must be used. 178 179 - Time Base = Timestamp of first sample in frame 180 The "Time Base" is used to rearange packets and to detect packet loss. 181 The 16 bits are sent in network order (MSB first) and count 1/8000 th of a 182 second. This causes a wrap around each 8,192 seconds. There is no requirement 183 for the initial "Time Base", but 0 should be used for the first packet. 184 In case of HDLC data, this timestamp counts the packet or byte number. 185 186 187 Two Timers: 188 189 After initialisation, a timer of 15 seconds is started. Whenever a packet is 190 transmitted, the timer is reset to 15 seconds again. If the timer expires, an 191 empty packet is transmitted. This keep the connection alive. 192 193 When a valid packet is received, a timer 65 seconds is started. The interface 194 become ACTIVE. If the timer expires, the interface becomes INACTIVE. 195 196 197 Dynamic IP handling: 198 199 To allow dynamic IP, the ID must be non 0. In this case, any packet with the 200 correct port number and ID will be accepted. If the remote side changes its IP 201 the new IP is used for all transmitted packets until it changes again. 202 203 204 On Demand: 205 206 If the ondemand parameter is given, the remote IP is set to 0 on timeout. 207 This will stop keepalive traffic to remote. If the remote is online again, 208 traffic will continue to the remote address. This is useful for road warriors. 209 This feature only works with ID set, otherwhise it is highly unsecure. 210 211 212 Socket and Thread 213 ----------------- 214 215 The complete socket opening and closing is done by a thread. 216 When the thread opened a socket, the hc->socket descriptor is set. Whenever a 217 packet shall be sent to the socket, the hc->socket must be checked wheter not 218 NULL. To prevent change in socket descriptor, the hc->socket_lock must be used. 219 To change the socket, a recall of l1oip_socket_open() will safely kill the 220 socket process and create a new one. 221 222 */ 223 224 #define L1OIP_VERSION 0 /* 0...3 */ 225 226 #include <linux/module.h> 227 #include <linux/delay.h> 228 #include <linux/mISDNif.h> 229 #include <linux/mISDNhw.h> 230 #include <linux/mISDNdsp.h> 231 #include <linux/init.h> 232 #include <linux/in.h> 233 #include <linux/inet.h> 234 #include <linux/workqueue.h> 235 #include <linux/kthread.h> 236 #include <linux/slab.h> 237 #include <linux/sched/signal.h> 238 239 #include <net/sock.h> 240 #include "core.h" 241 #include "l1oip.h" 242 243 static const char *l1oip_revision = "2.00"; 244 245 static int l1oip_cnt; 246 static spinlock_t l1oip_lock; 247 static struct list_head l1oip_ilist; 248 249 #define MAX_CARDS 16 250 static u_int type[MAX_CARDS]; 251 static u_int codec[MAX_CARDS]; 252 static u_int ip[MAX_CARDS * 4]; 253 static u_int port[MAX_CARDS]; 254 static u_int remoteport[MAX_CARDS]; 255 static u_int ondemand[MAX_CARDS]; 256 static u_int limit[MAX_CARDS]; 257 static u_int id[MAX_CARDS]; 258 static int debug; 259 static int ulaw; 260 261 MODULE_AUTHOR("Andreas Eversberg"); 262 MODULE_LICENSE("GPL"); 263 module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR); 264 module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR); 265 module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR); 266 module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR); 267 module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR); 268 module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR); 269 module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR); 270 module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR); 271 module_param(ulaw, uint, S_IRUGO | S_IWUSR); 272 module_param(debug, uint, S_IRUGO | S_IWUSR); 273 274 /* 275 * send a frame via socket, if open and restart timer 276 */ 277 static int 278 l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask, 279 u16 timebase, u8 *buf, int len) 280 { 281 u8 *p; 282 u8 frame[MAX_DFRAME_LEN_L1 + 32]; 283 struct socket *socket = NULL; 284 285 if (debug & DEBUG_L1OIP_MSG) 286 printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n", 287 __func__, len); 288 289 p = frame; 290 291 /* restart timer */ 292 if (time_before(hc->keep_tl.expires, jiffies + 5 * HZ)) 293 mod_timer(&hc->keep_tl, jiffies + L1OIP_KEEPALIVE * HZ); 294 else 295 hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ; 296 297 if (debug & DEBUG_L1OIP_MSG) 298 printk(KERN_DEBUG "%s: resetting timer\n", __func__); 299 300 /* drop if we have no remote ip or port */ 301 if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) { 302 if (debug & DEBUG_L1OIP_MSG) 303 printk(KERN_DEBUG "%s: dropping frame, because remote " 304 "IP is not set.\n", __func__); 305 return len; 306 } 307 308 /* assemble frame */ 309 *p++ = (L1OIP_VERSION << 6) /* version and coding */ 310 | (hc->pri ? 0x20 : 0x00) /* type */ 311 | (hc->id ? 0x10 : 0x00) /* id */ 312 | localcodec; 313 if (hc->id) { 314 *p++ = hc->id >> 24; /* id */ 315 *p++ = hc->id >> 16; 316 *p++ = hc->id >> 8; 317 *p++ = hc->id; 318 } 319 *p++ = 0x00 + channel; /* m-flag, channel */ 320 *p++ = timebase >> 8; /* time base */ 321 *p++ = timebase; 322 323 if (buf && len) { /* add data to frame */ 324 if (localcodec == 1 && ulaw) 325 l1oip_ulaw_to_alaw(buf, len, p); 326 else if (localcodec == 2 && !ulaw) 327 l1oip_alaw_to_ulaw(buf, len, p); 328 else if (localcodec == 3) 329 len = l1oip_law_to_4bit(buf, len, p, 330 &hc->chan[channel].codecstate); 331 else 332 memcpy(p, buf, len); 333 } 334 len += p - frame; 335 336 /* check for socket in safe condition */ 337 spin_lock(&hc->socket_lock); 338 if (!hc->socket) { 339 spin_unlock(&hc->socket_lock); 340 return 0; 341 } 342 /* seize socket */ 343 socket = hc->socket; 344 hc->socket = NULL; 345 spin_unlock(&hc->socket_lock); 346 /* send packet */ 347 if (debug & DEBUG_L1OIP_MSG) 348 printk(KERN_DEBUG "%s: sending packet to socket (len " 349 "= %d)\n", __func__, len); 350 hc->sendiov.iov_base = frame; 351 hc->sendiov.iov_len = len; 352 len = kernel_sendmsg(socket, &hc->sendmsg, &hc->sendiov, 1, len); 353 /* give socket back */ 354 hc->socket = socket; /* no locking required */ 355 356 return len; 357 } 358 359 360 /* 361 * receive channel data from socket 362 */ 363 static void 364 l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase, 365 u8 *buf, int len) 366 { 367 struct sk_buff *nskb; 368 struct bchannel *bch; 369 struct dchannel *dch; 370 u8 *p; 371 u32 rx_counter; 372 373 if (len == 0) { 374 if (debug & DEBUG_L1OIP_MSG) 375 printk(KERN_DEBUG "%s: received empty keepalive data, " 376 "ignoring\n", __func__); 377 return; 378 } 379 380 if (debug & DEBUG_L1OIP_MSG) 381 printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n", 382 __func__, len); 383 384 if (channel < 1 || channel > 127) { 385 printk(KERN_WARNING "%s: packet error - channel %d out of " 386 "range\n", __func__, channel); 387 return; 388 } 389 dch = hc->chan[channel].dch; 390 bch = hc->chan[channel].bch; 391 if (!dch && !bch) { 392 printk(KERN_WARNING "%s: packet error - channel %d not in " 393 "stack\n", __func__, channel); 394 return; 395 } 396 397 /* prepare message */ 398 nskb = mI_alloc_skb((remotecodec == 3) ? (len << 1) : len, GFP_ATOMIC); 399 if (!nskb) { 400 printk(KERN_ERR "%s: No mem for skb.\n", __func__); 401 return; 402 } 403 p = skb_put(nskb, (remotecodec == 3) ? (len << 1) : len); 404 405 if (remotecodec == 1 && ulaw) 406 l1oip_alaw_to_ulaw(buf, len, p); 407 else if (remotecodec == 2 && !ulaw) 408 l1oip_ulaw_to_alaw(buf, len, p); 409 else if (remotecodec == 3) 410 len = l1oip_4bit_to_law(buf, len, p); 411 else 412 memcpy(p, buf, len); 413 414 /* send message up */ 415 if (dch && len >= 2) { 416 dch->rx_skb = nskb; 417 recv_Dchannel(dch); 418 } 419 if (bch) { 420 /* expand 16 bit sequence number to 32 bit sequence number */ 421 rx_counter = hc->chan[channel].rx_counter; 422 if (((s16)(timebase - rx_counter)) >= 0) { 423 /* time has changed forward */ 424 if (timebase >= (rx_counter & 0xffff)) 425 rx_counter = 426 (rx_counter & 0xffff0000) | timebase; 427 else 428 rx_counter = ((rx_counter & 0xffff0000) + 0x10000) 429 | timebase; 430 } else { 431 /* time has changed backwards */ 432 if (timebase < (rx_counter & 0xffff)) 433 rx_counter = 434 (rx_counter & 0xffff0000) | timebase; 435 else 436 rx_counter = ((rx_counter & 0xffff0000) - 0x10000) 437 | timebase; 438 } 439 hc->chan[channel].rx_counter = rx_counter; 440 441 #ifdef REORDER_DEBUG 442 if (hc->chan[channel].disorder_flag) { 443 swap(hc->chan[channel].disorder_skb, nskb); 444 swap(hc->chan[channel].disorder_cnt, rx_counter); 445 } 446 hc->chan[channel].disorder_flag ^= 1; 447 if (nskb) 448 #endif 449 queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb); 450 } 451 } 452 453 454 /* 455 * parse frame and extract channel data 456 */ 457 static void 458 l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len) 459 { 460 u32 packet_id; 461 u8 channel; 462 u8 remotecodec; 463 u16 timebase; 464 int m, mlen; 465 int len_start = len; /* initial frame length */ 466 struct dchannel *dch = hc->chan[hc->d_idx].dch; 467 468 if (debug & DEBUG_L1OIP_MSG) 469 printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n", 470 __func__, len); 471 472 /* check length */ 473 if (len < 1 + 1 + 2) { 474 printk(KERN_WARNING "%s: packet error - length %d below " 475 "4 bytes\n", __func__, len); 476 return; 477 } 478 479 /* check version */ 480 if (((*buf) >> 6) != L1OIP_VERSION) { 481 printk(KERN_WARNING "%s: packet error - unknown version %d\n", 482 __func__, buf[0]>>6); 483 return; 484 } 485 486 /* check type */ 487 if (((*buf) & 0x20) && !hc->pri) { 488 printk(KERN_WARNING "%s: packet error - received E1 packet " 489 "on S0 interface\n", __func__); 490 return; 491 } 492 if (!((*buf) & 0x20) && hc->pri) { 493 printk(KERN_WARNING "%s: packet error - received S0 packet " 494 "on E1 interface\n", __func__); 495 return; 496 } 497 498 /* get id flag */ 499 packet_id = (*buf >> 4) & 1; 500 501 /* check coding */ 502 remotecodec = (*buf) & 0x0f; 503 if (remotecodec > 3) { 504 printk(KERN_WARNING "%s: packet error - remotecodec %d " 505 "unsupported\n", __func__, remotecodec); 506 return; 507 } 508 buf++; 509 len--; 510 511 /* check packet_id */ 512 if (packet_id) { 513 if (!hc->id) { 514 printk(KERN_WARNING "%s: packet error - packet has id " 515 "0x%x, but we have not\n", __func__, packet_id); 516 return; 517 } 518 if (len < 4) { 519 printk(KERN_WARNING "%s: packet error - packet too " 520 "short for ID value\n", __func__); 521 return; 522 } 523 packet_id = (*buf++) << 24; 524 packet_id += (*buf++) << 16; 525 packet_id += (*buf++) << 8; 526 packet_id += (*buf++); 527 len -= 4; 528 529 if (packet_id != hc->id) { 530 printk(KERN_WARNING "%s: packet error - ID mismatch, " 531 "got 0x%x, we 0x%x\n", 532 __func__, packet_id, hc->id); 533 return; 534 } 535 } else { 536 if (hc->id) { 537 printk(KERN_WARNING "%s: packet error - packet has no " 538 "ID, but we have\n", __func__); 539 return; 540 } 541 } 542 543 multiframe: 544 if (len < 1) { 545 printk(KERN_WARNING "%s: packet error - packet too short, " 546 "channel expected at position %d.\n", 547 __func__, len-len_start + 1); 548 return; 549 } 550 551 /* get channel and multiframe flag */ 552 channel = *buf & 0x7f; 553 m = *buf >> 7; 554 buf++; 555 len--; 556 557 /* check length on multiframe */ 558 if (m) { 559 if (len < 1) { 560 printk(KERN_WARNING "%s: packet error - packet too " 561 "short, length expected at position %d.\n", 562 __func__, len_start - len - 1); 563 return; 564 } 565 566 mlen = *buf++; 567 len--; 568 if (mlen == 0) 569 mlen = 256; 570 if (len < mlen + 3) { 571 printk(KERN_WARNING "%s: packet error - length %d at " 572 "position %d exceeds total length %d.\n", 573 __func__, mlen, len_start-len - 1, len_start); 574 return; 575 } 576 if (len == mlen + 3) { 577 printk(KERN_WARNING "%s: packet error - length %d at " 578 "position %d will not allow additional " 579 "packet.\n", 580 __func__, mlen, len_start-len + 1); 581 return; 582 } 583 } else 584 mlen = len - 2; /* single frame, subtract timebase */ 585 586 if (len < 2) { 587 printk(KERN_WARNING "%s: packet error - packet too short, time " 588 "base expected at position %d.\n", 589 __func__, len-len_start + 1); 590 return; 591 } 592 593 /* get time base */ 594 timebase = (*buf++) << 8; 595 timebase |= (*buf++); 596 len -= 2; 597 598 /* if inactive, we send up a PH_ACTIVATE and activate */ 599 if (!test_bit(FLG_ACTIVE, &dch->Flags)) { 600 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 601 printk(KERN_DEBUG "%s: interface become active due to " 602 "received packet\n", __func__); 603 test_and_set_bit(FLG_ACTIVE, &dch->Flags); 604 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, 605 NULL, GFP_ATOMIC); 606 } 607 608 /* distribute packet */ 609 l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen); 610 buf += mlen; 611 len -= mlen; 612 613 /* multiframe */ 614 if (m) 615 goto multiframe; 616 617 /* restart timer */ 618 if (time_before(hc->timeout_tl.expires, jiffies + 5 * HZ) || !hc->timeout_on) { 619 hc->timeout_on = 1; 620 mod_timer(&hc->timeout_tl, jiffies + L1OIP_TIMEOUT * HZ); 621 } else /* only adjust timer */ 622 hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ; 623 624 /* if ip or source port changes */ 625 if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr) 626 || (hc->sin_remote.sin_port != sin->sin_port)) { 627 if (debug & DEBUG_L1OIP_SOCKET) 628 printk(KERN_DEBUG "%s: remote address changes from " 629 "0x%08x to 0x%08x (port %d to %d)\n", __func__, 630 ntohl(hc->sin_remote.sin_addr.s_addr), 631 ntohl(sin->sin_addr.s_addr), 632 ntohs(hc->sin_remote.sin_port), 633 ntohs(sin->sin_port)); 634 hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr; 635 hc->sin_remote.sin_port = sin->sin_port; 636 } 637 } 638 639 640 /* 641 * socket stuff 642 */ 643 static int 644 l1oip_socket_thread(void *data) 645 { 646 struct l1oip *hc = (struct l1oip *)data; 647 int ret = 0; 648 struct sockaddr_in sin_rx; 649 struct kvec iov; 650 struct msghdr msg = {.msg_name = &sin_rx, 651 .msg_namelen = sizeof(sin_rx)}; 652 unsigned char *recvbuf; 653 size_t recvbuf_size = 1500; 654 int recvlen; 655 struct socket *socket = NULL; 656 DECLARE_COMPLETION_ONSTACK(wait); 657 658 /* allocate buffer memory */ 659 recvbuf = kmalloc(recvbuf_size, GFP_KERNEL); 660 if (!recvbuf) { 661 printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__); 662 ret = -ENOMEM; 663 goto fail; 664 } 665 666 iov.iov_base = recvbuf; 667 iov.iov_len = recvbuf_size; 668 669 /* make daemon */ 670 allow_signal(SIGTERM); 671 672 /* create socket */ 673 if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) { 674 printk(KERN_ERR "%s: Failed to create socket.\n", __func__); 675 ret = -EIO; 676 goto fail; 677 } 678 679 /* set incoming address */ 680 hc->sin_local.sin_family = AF_INET; 681 hc->sin_local.sin_addr.s_addr = INADDR_ANY; 682 hc->sin_local.sin_port = htons((unsigned short)hc->localport); 683 684 /* set outgoing address */ 685 hc->sin_remote.sin_family = AF_INET; 686 hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip); 687 hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport); 688 689 /* bind to incoming port */ 690 if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local, 691 sizeof(hc->sin_local))) { 692 printk(KERN_ERR "%s: Failed to bind socket to port %d.\n", 693 __func__, hc->localport); 694 ret = -EINVAL; 695 goto fail; 696 } 697 698 /* check sk */ 699 if (socket->sk == NULL) { 700 printk(KERN_ERR "%s: socket->sk == NULL\n", __func__); 701 ret = -EIO; 702 goto fail; 703 } 704 705 /* build send message */ 706 hc->sendmsg.msg_name = &hc->sin_remote; 707 hc->sendmsg.msg_namelen = sizeof(hc->sin_remote); 708 hc->sendmsg.msg_control = NULL; 709 hc->sendmsg.msg_controllen = 0; 710 711 /* give away socket */ 712 spin_lock(&hc->socket_lock); 713 hc->socket = socket; 714 spin_unlock(&hc->socket_lock); 715 716 /* read loop */ 717 if (debug & DEBUG_L1OIP_SOCKET) 718 printk(KERN_DEBUG "%s: socket created and open\n", 719 __func__); 720 while (!signal_pending(current)) { 721 iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, recvbuf_size); 722 recvlen = sock_recvmsg(socket, &msg, 0); 723 if (recvlen > 0) { 724 l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen); 725 } else { 726 if (debug & DEBUG_L1OIP_SOCKET) 727 printk(KERN_WARNING 728 "%s: broken pipe on socket\n", __func__); 729 } 730 } 731 732 /* get socket back, check first if in use, maybe by send function */ 733 spin_lock(&hc->socket_lock); 734 /* if hc->socket is NULL, it is in use until it is given back */ 735 while (!hc->socket) { 736 spin_unlock(&hc->socket_lock); 737 schedule_timeout(HZ / 10); 738 spin_lock(&hc->socket_lock); 739 } 740 hc->socket = NULL; 741 spin_unlock(&hc->socket_lock); 742 743 if (debug & DEBUG_L1OIP_SOCKET) 744 printk(KERN_DEBUG "%s: socket thread terminating\n", 745 __func__); 746 747 fail: 748 /* free recvbuf */ 749 kfree(recvbuf); 750 751 /* close socket */ 752 if (socket) 753 sock_release(socket); 754 755 /* if we got killed, signal completion */ 756 complete(&hc->socket_complete); 757 hc->socket_thread = NULL; /* show termination of thread */ 758 759 if (debug & DEBUG_L1OIP_SOCKET) 760 printk(KERN_DEBUG "%s: socket thread terminated\n", 761 __func__); 762 return ret; 763 } 764 765 static void 766 l1oip_socket_close(struct l1oip *hc) 767 { 768 struct dchannel *dch = hc->chan[hc->d_idx].dch; 769 770 /* kill thread */ 771 if (hc->socket_thread) { 772 if (debug & DEBUG_L1OIP_SOCKET) 773 printk(KERN_DEBUG "%s: socket thread exists, " 774 "killing...\n", __func__); 775 send_sig(SIGTERM, hc->socket_thread, 0); 776 wait_for_completion(&hc->socket_complete); 777 } 778 779 /* if active, we send up a PH_DEACTIVATE and deactivate */ 780 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 781 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 782 printk(KERN_DEBUG "%s: interface become deactivated " 783 "due to timeout\n", __func__); 784 test_and_clear_bit(FLG_ACTIVE, &dch->Flags); 785 _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 786 NULL, GFP_ATOMIC); 787 } 788 } 789 790 static int 791 l1oip_socket_open(struct l1oip *hc) 792 { 793 /* in case of reopen, we need to close first */ 794 l1oip_socket_close(hc); 795 796 init_completion(&hc->socket_complete); 797 798 /* create receive process */ 799 hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s", 800 hc->name); 801 if (IS_ERR(hc->socket_thread)) { 802 int err = PTR_ERR(hc->socket_thread); 803 printk(KERN_ERR "%s: Failed (%d) to create socket process.\n", 804 __func__, err); 805 hc->socket_thread = NULL; 806 sock_release(hc->socket); 807 return err; 808 } 809 if (debug & DEBUG_L1OIP_SOCKET) 810 printk(KERN_DEBUG "%s: socket thread created\n", __func__); 811 812 return 0; 813 } 814 815 816 static void 817 l1oip_send_bh(struct work_struct *work) 818 { 819 struct l1oip *hc = container_of(work, struct l1oip, workq); 820 821 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 822 printk(KERN_DEBUG "%s: keepalive timer expired, sending empty " 823 "frame on dchannel\n", __func__); 824 825 /* send an empty l1oip frame at D-channel */ 826 l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0); 827 } 828 829 830 /* 831 * timer stuff 832 */ 833 static void 834 l1oip_keepalive(struct timer_list *t) 835 { 836 struct l1oip *hc = from_timer(hc, t, keep_tl); 837 838 schedule_work(&hc->workq); 839 } 840 841 static void 842 l1oip_timeout(struct timer_list *t) 843 { 844 struct l1oip *hc = from_timer(hc, t, 845 timeout_tl); 846 struct dchannel *dch = hc->chan[hc->d_idx].dch; 847 848 if (debug & DEBUG_L1OIP_MSG) 849 printk(KERN_DEBUG "%s: timeout timer expired, turn layer one " 850 "down.\n", __func__); 851 852 hc->timeout_on = 0; /* state that timer must be initialized next time */ 853 854 /* if timeout, we send up a PH_DEACTIVATE and deactivate */ 855 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 856 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 857 printk(KERN_DEBUG "%s: interface become deactivated " 858 "due to timeout\n", __func__); 859 test_and_clear_bit(FLG_ACTIVE, &dch->Flags); 860 _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 861 NULL, GFP_ATOMIC); 862 } 863 864 /* if we have ondemand set, we remove ip address */ 865 if (hc->ondemand) { 866 if (debug & DEBUG_L1OIP_MSG) 867 printk(KERN_DEBUG "%s: on demand causes ip address to " 868 "be removed\n", __func__); 869 hc->sin_remote.sin_addr.s_addr = 0; 870 } 871 } 872 873 874 /* 875 * message handling 876 */ 877 static int 878 handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb) 879 { 880 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 881 struct dchannel *dch = container_of(dev, struct dchannel, dev); 882 struct l1oip *hc = dch->hw; 883 struct mISDNhead *hh = mISDN_HEAD_P(skb); 884 int ret = -EINVAL; 885 int l, ll; 886 unsigned char *p; 887 888 switch (hh->prim) { 889 case PH_DATA_REQ: 890 if (skb->len < 1) { 891 printk(KERN_WARNING "%s: skb too small\n", 892 __func__); 893 break; 894 } 895 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { 896 printk(KERN_WARNING "%s: skb too large\n", 897 __func__); 898 break; 899 } 900 /* send frame */ 901 p = skb->data; 902 l = skb->len; 903 while (l) { 904 /* 905 * This is technically bounded by L1OIP_MAX_PERFRAME but 906 * MAX_DFRAME_LEN_L1 < L1OIP_MAX_PERFRAME 907 */ 908 ll = (l < MAX_DFRAME_LEN_L1) ? l : MAX_DFRAME_LEN_L1; 909 l1oip_socket_send(hc, 0, dch->slot, 0, 910 hc->chan[dch->slot].tx_counter++, p, ll); 911 p += ll; 912 l -= ll; 913 } 914 skb_trim(skb, 0); 915 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 916 return 0; 917 case PH_ACTIVATE_REQ: 918 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 919 printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" 920 , __func__, dch->slot, hc->b_num + 1); 921 skb_trim(skb, 0); 922 if (test_bit(FLG_ACTIVE, &dch->Flags)) 923 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); 924 else 925 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); 926 return 0; 927 case PH_DEACTIVATE_REQ: 928 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 929 printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " 930 "(1..%d)\n", __func__, dch->slot, 931 hc->b_num + 1); 932 skb_trim(skb, 0); 933 if (test_bit(FLG_ACTIVE, &dch->Flags)) 934 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); 935 else 936 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); 937 return 0; 938 } 939 if (!ret) 940 dev_kfree_skb(skb); 941 return ret; 942 } 943 944 static int 945 channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq) 946 { 947 int ret = 0; 948 struct l1oip *hc = dch->hw; 949 950 switch (cq->op) { 951 case MISDN_CTRL_GETOP: 952 cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER 953 | MISDN_CTRL_GETPEER; 954 break; 955 case MISDN_CTRL_SETPEER: 956 hc->remoteip = (u32)cq->p1; 957 hc->remoteport = cq->p2 & 0xffff; 958 hc->localport = cq->p2 >> 16; 959 if (!hc->remoteport) 960 hc->remoteport = hc->localport; 961 if (debug & DEBUG_L1OIP_SOCKET) 962 printk(KERN_DEBUG "%s: got new ip address from user " 963 "space.\n", __func__); 964 l1oip_socket_open(hc); 965 break; 966 case MISDN_CTRL_UNSETPEER: 967 if (debug & DEBUG_L1OIP_SOCKET) 968 printk(KERN_DEBUG "%s: removing ip address.\n", 969 __func__); 970 hc->remoteip = 0; 971 l1oip_socket_open(hc); 972 break; 973 case MISDN_CTRL_GETPEER: 974 if (debug & DEBUG_L1OIP_SOCKET) 975 printk(KERN_DEBUG "%s: getting ip address.\n", 976 __func__); 977 cq->p1 = hc->remoteip; 978 cq->p2 = hc->remoteport | (hc->localport << 16); 979 break; 980 default: 981 printk(KERN_WARNING "%s: unknown Op %x\n", 982 __func__, cq->op); 983 ret = -EINVAL; 984 break; 985 } 986 return ret; 987 } 988 989 static int 990 open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) 991 { 992 if (debug & DEBUG_HW_OPEN) 993 printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__, 994 dch->dev.id, __builtin_return_address(0)); 995 if (rq->protocol == ISDN_P_NONE) 996 return -EINVAL; 997 if ((dch->dev.D.protocol != ISDN_P_NONE) && 998 (dch->dev.D.protocol != rq->protocol)) { 999 if (debug & DEBUG_HW_OPEN) 1000 printk(KERN_WARNING "%s: change protocol %x to %x\n", 1001 __func__, dch->dev.D.protocol, rq->protocol); 1002 } 1003 if (dch->dev.D.protocol != rq->protocol) 1004 dch->dev.D.protocol = rq->protocol; 1005 1006 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 1007 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 1008 0, NULL, GFP_KERNEL); 1009 } 1010 rq->ch = &dch->dev.D; 1011 if (!try_module_get(THIS_MODULE)) 1012 printk(KERN_WARNING "%s:cannot get module\n", __func__); 1013 return 0; 1014 } 1015 1016 static int 1017 open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) 1018 { 1019 struct bchannel *bch; 1020 int ch; 1021 1022 if (!test_channelmap(rq->adr.channel, dch->dev.channelmap)) 1023 return -EINVAL; 1024 if (rq->protocol == ISDN_P_NONE) 1025 return -EINVAL; 1026 ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */ 1027 bch = hc->chan[ch].bch; 1028 if (!bch) { 1029 printk(KERN_ERR "%s:internal error ch %d has no bch\n", 1030 __func__, ch); 1031 return -EINVAL; 1032 } 1033 if (test_and_set_bit(FLG_OPEN, &bch->Flags)) 1034 return -EBUSY; /* b-channel can be only open once */ 1035 bch->ch.protocol = rq->protocol; 1036 rq->ch = &bch->ch; 1037 if (!try_module_get(THIS_MODULE)) 1038 printk(KERN_WARNING "%s:cannot get module\n", __func__); 1039 return 0; 1040 } 1041 1042 static int 1043 l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg) 1044 { 1045 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 1046 struct dchannel *dch = container_of(dev, struct dchannel, dev); 1047 struct l1oip *hc = dch->hw; 1048 struct channel_req *rq; 1049 int err = 0; 1050 1051 if (dch->debug & DEBUG_HW) 1052 printk(KERN_DEBUG "%s: cmd:%x %p\n", 1053 __func__, cmd, arg); 1054 switch (cmd) { 1055 case OPEN_CHANNEL: 1056 rq = arg; 1057 switch (rq->protocol) { 1058 case ISDN_P_TE_S0: 1059 case ISDN_P_NT_S0: 1060 if (hc->pri) { 1061 err = -EINVAL; 1062 break; 1063 } 1064 err = open_dchannel(hc, dch, rq); 1065 break; 1066 case ISDN_P_TE_E1: 1067 case ISDN_P_NT_E1: 1068 if (!hc->pri) { 1069 err = -EINVAL; 1070 break; 1071 } 1072 err = open_dchannel(hc, dch, rq); 1073 break; 1074 default: 1075 err = open_bchannel(hc, dch, rq); 1076 } 1077 break; 1078 case CLOSE_CHANNEL: 1079 if (debug & DEBUG_HW_OPEN) 1080 printk(KERN_DEBUG "%s: dev(%d) close from %p\n", 1081 __func__, dch->dev.id, 1082 __builtin_return_address(0)); 1083 module_put(THIS_MODULE); 1084 break; 1085 case CONTROL_CHANNEL: 1086 err = channel_dctrl(dch, arg); 1087 break; 1088 default: 1089 if (dch->debug & DEBUG_HW) 1090 printk(KERN_DEBUG "%s: unknown command %x\n", 1091 __func__, cmd); 1092 err = -EINVAL; 1093 } 1094 return err; 1095 } 1096 1097 static int 1098 handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb) 1099 { 1100 struct bchannel *bch = container_of(ch, struct bchannel, ch); 1101 struct l1oip *hc = bch->hw; 1102 int ret = -EINVAL; 1103 struct mISDNhead *hh = mISDN_HEAD_P(skb); 1104 int l, ll; 1105 unsigned char *p; 1106 1107 switch (hh->prim) { 1108 case PH_DATA_REQ: 1109 if (skb->len <= 0) { 1110 printk(KERN_WARNING "%s: skb too small\n", 1111 __func__); 1112 break; 1113 } 1114 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { 1115 printk(KERN_WARNING "%s: skb too large\n", 1116 __func__); 1117 break; 1118 } 1119 /* check for AIS / ulaw-silence */ 1120 l = skb->len; 1121 if (!memchr_inv(skb->data, 0xff, l)) { 1122 if (debug & DEBUG_L1OIP_MSG) 1123 printk(KERN_DEBUG "%s: got AIS, not sending, " 1124 "but counting\n", __func__); 1125 hc->chan[bch->slot].tx_counter += l; 1126 skb_trim(skb, 0); 1127 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 1128 return 0; 1129 } 1130 /* check for silence */ 1131 l = skb->len; 1132 if (!memchr_inv(skb->data, 0x2a, l)) { 1133 if (debug & DEBUG_L1OIP_MSG) 1134 printk(KERN_DEBUG "%s: got silence, not sending" 1135 ", but counting\n", __func__); 1136 hc->chan[bch->slot].tx_counter += l; 1137 skb_trim(skb, 0); 1138 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 1139 return 0; 1140 } 1141 1142 /* send frame */ 1143 p = skb->data; 1144 l = skb->len; 1145 while (l) { 1146 /* 1147 * This is technically bounded by L1OIP_MAX_PERFRAME but 1148 * MAX_DFRAME_LEN_L1 < L1OIP_MAX_PERFRAME 1149 */ 1150 ll = (l < MAX_DFRAME_LEN_L1) ? l : MAX_DFRAME_LEN_L1; 1151 l1oip_socket_send(hc, hc->codec, bch->slot, 0, 1152 hc->chan[bch->slot].tx_counter, p, ll); 1153 hc->chan[bch->slot].tx_counter += ll; 1154 p += ll; 1155 l -= ll; 1156 } 1157 skb_trim(skb, 0); 1158 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 1159 return 0; 1160 case PH_ACTIVATE_REQ: 1161 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 1162 printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" 1163 , __func__, bch->slot, hc->b_num + 1); 1164 hc->chan[bch->slot].codecstate = 0; 1165 test_and_set_bit(FLG_ACTIVE, &bch->Flags); 1166 skb_trim(skb, 0); 1167 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); 1168 return 0; 1169 case PH_DEACTIVATE_REQ: 1170 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 1171 printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " 1172 "(1..%d)\n", __func__, bch->slot, 1173 hc->b_num + 1); 1174 test_and_clear_bit(FLG_ACTIVE, &bch->Flags); 1175 skb_trim(skb, 0); 1176 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); 1177 return 0; 1178 } 1179 if (!ret) 1180 dev_kfree_skb(skb); 1181 return ret; 1182 } 1183 1184 static int 1185 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) 1186 { 1187 int ret = 0; 1188 struct dsp_features *features = 1189 (struct dsp_features *)(*((u_long *)&cq->p1)); 1190 1191 switch (cq->op) { 1192 case MISDN_CTRL_GETOP: 1193 cq->op = MISDN_CTRL_HW_FEATURES_OP; 1194 break; 1195 case MISDN_CTRL_HW_FEATURES: /* fill features structure */ 1196 if (debug & DEBUG_L1OIP_MSG) 1197 printk(KERN_DEBUG "%s: HW_FEATURE request\n", 1198 __func__); 1199 /* create confirm */ 1200 features->unclocked = 1; 1201 features->unordered = 1; 1202 break; 1203 default: 1204 printk(KERN_WARNING "%s: unknown Op %x\n", 1205 __func__, cq->op); 1206 ret = -EINVAL; 1207 break; 1208 } 1209 return ret; 1210 } 1211 1212 static int 1213 l1oip_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg) 1214 { 1215 struct bchannel *bch = container_of(ch, struct bchannel, ch); 1216 int err = -EINVAL; 1217 1218 if (bch->debug & DEBUG_HW) 1219 printk(KERN_DEBUG "%s: cmd:%x %p\n", 1220 __func__, cmd, arg); 1221 switch (cmd) { 1222 case CLOSE_CHANNEL: 1223 test_and_clear_bit(FLG_OPEN, &bch->Flags); 1224 test_and_clear_bit(FLG_ACTIVE, &bch->Flags); 1225 ch->protocol = ISDN_P_NONE; 1226 ch->peer = NULL; 1227 module_put(THIS_MODULE); 1228 err = 0; 1229 break; 1230 case CONTROL_CHANNEL: 1231 err = channel_bctrl(bch, arg); 1232 break; 1233 default: 1234 printk(KERN_WARNING "%s: unknown prim(%x)\n", 1235 __func__, cmd); 1236 } 1237 return err; 1238 } 1239 1240 1241 /* 1242 * cleanup module and stack 1243 */ 1244 static void 1245 release_card(struct l1oip *hc) 1246 { 1247 int ch; 1248 1249 if (timer_pending(&hc->keep_tl)) 1250 del_timer(&hc->keep_tl); 1251 1252 if (timer_pending(&hc->timeout_tl)) 1253 del_timer(&hc->timeout_tl); 1254 1255 cancel_work_sync(&hc->workq); 1256 1257 if (hc->socket_thread) 1258 l1oip_socket_close(hc); 1259 1260 if (hc->registered && hc->chan[hc->d_idx].dch) 1261 mISDN_unregister_device(&hc->chan[hc->d_idx].dch->dev); 1262 for (ch = 0; ch < 128; ch++) { 1263 if (hc->chan[ch].dch) { 1264 mISDN_freedchannel(hc->chan[ch].dch); 1265 kfree(hc->chan[ch].dch); 1266 } 1267 if (hc->chan[ch].bch) { 1268 mISDN_freebchannel(hc->chan[ch].bch); 1269 kfree(hc->chan[ch].bch); 1270 #ifdef REORDER_DEBUG 1271 if (hc->chan[ch].disorder_skb) 1272 dev_kfree_skb(hc->chan[ch].disorder_skb); 1273 #endif 1274 } 1275 } 1276 1277 spin_lock(&l1oip_lock); 1278 list_del(&hc->list); 1279 spin_unlock(&l1oip_lock); 1280 1281 kfree(hc); 1282 } 1283 1284 static void 1285 l1oip_cleanup(void) 1286 { 1287 struct l1oip *hc, *next; 1288 1289 list_for_each_entry_safe(hc, next, &l1oip_ilist, list) 1290 release_card(hc); 1291 1292 l1oip_4bit_free(); 1293 } 1294 1295 1296 /* 1297 * module and stack init 1298 */ 1299 static int 1300 init_card(struct l1oip *hc, int pri, int bundle) 1301 { 1302 struct dchannel *dch; 1303 struct bchannel *bch; 1304 int ret; 1305 int i, ch; 1306 1307 spin_lock_init(&hc->socket_lock); 1308 hc->idx = l1oip_cnt; 1309 hc->pri = pri; 1310 hc->d_idx = pri ? 16 : 3; 1311 hc->b_num = pri ? 30 : 2; 1312 hc->bundle = bundle; 1313 if (hc->pri) 1314 sprintf(hc->name, "l1oip-e1.%d", l1oip_cnt + 1); 1315 else 1316 sprintf(hc->name, "l1oip-s0.%d", l1oip_cnt + 1); 1317 1318 switch (codec[l1oip_cnt]) { 1319 case 0: /* as is */ 1320 case 1: /* alaw */ 1321 case 2: /* ulaw */ 1322 case 3: /* 4bit */ 1323 break; 1324 default: 1325 printk(KERN_ERR "Codec(%d) not supported.\n", 1326 codec[l1oip_cnt]); 1327 return -EINVAL; 1328 } 1329 hc->codec = codec[l1oip_cnt]; 1330 if (debug & DEBUG_L1OIP_INIT) 1331 printk(KERN_DEBUG "%s: using codec %d\n", 1332 __func__, hc->codec); 1333 1334 if (id[l1oip_cnt] == 0) { 1335 printk(KERN_WARNING "Warning: No 'id' value given or " 1336 "0, this is highly unsecure. Please use 32 " 1337 "bit random number 0x...\n"); 1338 } 1339 hc->id = id[l1oip_cnt]; 1340 if (debug & DEBUG_L1OIP_INIT) 1341 printk(KERN_DEBUG "%s: using id 0x%x\n", __func__, hc->id); 1342 1343 hc->ondemand = ondemand[l1oip_cnt]; 1344 if (hc->ondemand && !hc->id) { 1345 printk(KERN_ERR "%s: ondemand option only allowed in " 1346 "conjunction with non 0 ID\n", __func__); 1347 return -EINVAL; 1348 } 1349 1350 if (limit[l1oip_cnt]) 1351 hc->b_num = limit[l1oip_cnt]; 1352 if (!pri && hc->b_num > 2) { 1353 printk(KERN_ERR "Maximum limit for BRI interface is 2 " 1354 "channels.\n"); 1355 return -EINVAL; 1356 } 1357 if (pri && hc->b_num > 126) { 1358 printk(KERN_ERR "Maximum limit for PRI interface is 126 " 1359 "channels.\n"); 1360 return -EINVAL; 1361 } 1362 if (pri && hc->b_num > 30) { 1363 printk(KERN_WARNING "Maximum limit for BRI interface is 30 " 1364 "channels.\n"); 1365 printk(KERN_WARNING "Your selection of %d channels must be " 1366 "supported by application.\n", hc->limit); 1367 } 1368 1369 hc->remoteip = ip[l1oip_cnt << 2] << 24 1370 | ip[(l1oip_cnt << 2) + 1] << 16 1371 | ip[(l1oip_cnt << 2) + 2] << 8 1372 | ip[(l1oip_cnt << 2) + 3]; 1373 hc->localport = port[l1oip_cnt]?:(L1OIP_DEFAULTPORT + l1oip_cnt); 1374 if (remoteport[l1oip_cnt]) 1375 hc->remoteport = remoteport[l1oip_cnt]; 1376 else 1377 hc->remoteport = hc->localport; 1378 if (debug & DEBUG_L1OIP_INIT) 1379 printk(KERN_DEBUG "%s: using local port %d remote ip " 1380 "%d.%d.%d.%d port %d ondemand %d\n", __func__, 1381 hc->localport, hc->remoteip >> 24, 1382 (hc->remoteip >> 16) & 0xff, 1383 (hc->remoteip >> 8) & 0xff, hc->remoteip & 0xff, 1384 hc->remoteport, hc->ondemand); 1385 1386 dch = kzalloc(sizeof(struct dchannel), GFP_KERNEL); 1387 if (!dch) 1388 return -ENOMEM; 1389 dch->debug = debug; 1390 mISDN_initdchannel(dch, MAX_DFRAME_LEN_L1, NULL); 1391 dch->hw = hc; 1392 if (pri) 1393 dch->dev.Dprotocols = (1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1); 1394 else 1395 dch->dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0); 1396 dch->dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | 1397 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); 1398 dch->dev.D.send = handle_dmsg; 1399 dch->dev.D.ctrl = l1oip_dctrl; 1400 dch->dev.nrbchan = hc->b_num; 1401 dch->slot = hc->d_idx; 1402 hc->chan[hc->d_idx].dch = dch; 1403 i = 1; 1404 for (ch = 0; ch < dch->dev.nrbchan; ch++) { 1405 if (ch == 15) 1406 i++; 1407 bch = kzalloc(sizeof(struct bchannel), GFP_KERNEL); 1408 if (!bch) { 1409 printk(KERN_ERR "%s: no memory for bchannel\n", 1410 __func__); 1411 return -ENOMEM; 1412 } 1413 bch->nr = i + ch; 1414 bch->slot = i + ch; 1415 bch->debug = debug; 1416 mISDN_initbchannel(bch, MAX_DATA_MEM, 0); 1417 bch->hw = hc; 1418 bch->ch.send = handle_bmsg; 1419 bch->ch.ctrl = l1oip_bctrl; 1420 bch->ch.nr = i + ch; 1421 list_add(&bch->ch.list, &dch->dev.bchannels); 1422 hc->chan[i + ch].bch = bch; 1423 set_channelmap(bch->nr, dch->dev.channelmap); 1424 } 1425 /* TODO: create a parent device for this driver */ 1426 ret = mISDN_register_device(&dch->dev, NULL, hc->name); 1427 if (ret) 1428 return ret; 1429 hc->registered = 1; 1430 1431 if (debug & DEBUG_L1OIP_INIT) 1432 printk(KERN_DEBUG "%s: Setting up network card(%d)\n", 1433 __func__, l1oip_cnt + 1); 1434 ret = l1oip_socket_open(hc); 1435 if (ret) 1436 return ret; 1437 1438 timer_setup(&hc->keep_tl, l1oip_keepalive, 0); 1439 hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */ 1440 add_timer(&hc->keep_tl); 1441 1442 timer_setup(&hc->timeout_tl, l1oip_timeout, 0); 1443 hc->timeout_on = 0; /* state that we have timer off */ 1444 1445 return 0; 1446 } 1447 1448 static int __init 1449 l1oip_init(void) 1450 { 1451 int pri, bundle; 1452 struct l1oip *hc; 1453 int ret; 1454 1455 printk(KERN_INFO "mISDN: Layer-1-over-IP driver Rev. %s\n", 1456 l1oip_revision); 1457 1458 INIT_LIST_HEAD(&l1oip_ilist); 1459 spin_lock_init(&l1oip_lock); 1460 1461 if (l1oip_4bit_alloc(ulaw)) 1462 return -ENOMEM; 1463 1464 l1oip_cnt = 0; 1465 while (l1oip_cnt < MAX_CARDS && type[l1oip_cnt]) { 1466 switch (type[l1oip_cnt] & 0xff) { 1467 case 1: 1468 pri = 0; 1469 bundle = 0; 1470 break; 1471 case 2: 1472 pri = 1; 1473 bundle = 0; 1474 break; 1475 case 3: 1476 pri = 0; 1477 bundle = 1; 1478 break; 1479 case 4: 1480 pri = 1; 1481 bundle = 1; 1482 break; 1483 default: 1484 printk(KERN_ERR "Card type(%d) not supported.\n", 1485 type[l1oip_cnt] & 0xff); 1486 l1oip_cleanup(); 1487 return -EINVAL; 1488 } 1489 1490 if (debug & DEBUG_L1OIP_INIT) 1491 printk(KERN_DEBUG "%s: interface %d is %s with %s.\n", 1492 __func__, l1oip_cnt, pri ? "PRI" : "BRI", 1493 bundle ? "bundled IP packet for all B-channels" : 1494 "separate IP packets for every B-channel"); 1495 1496 hc = kzalloc(sizeof(struct l1oip), GFP_ATOMIC); 1497 if (!hc) { 1498 printk(KERN_ERR "No kmem for L1-over-IP driver.\n"); 1499 l1oip_cleanup(); 1500 return -ENOMEM; 1501 } 1502 INIT_WORK(&hc->workq, (void *)l1oip_send_bh); 1503 1504 spin_lock(&l1oip_lock); 1505 list_add_tail(&hc->list, &l1oip_ilist); 1506 spin_unlock(&l1oip_lock); 1507 1508 ret = init_card(hc, pri, bundle); 1509 if (ret) { 1510 l1oip_cleanup(); 1511 return ret; 1512 } 1513 1514 l1oip_cnt++; 1515 } 1516 printk(KERN_INFO "%d virtual devices registered\n", l1oip_cnt); 1517 return 0; 1518 } 1519 1520 module_init(l1oip_init); 1521 module_exit(l1oip_cleanup); 1522