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 <net/sock.h> 238 #include "core.h" 239 #include "l1oip.h" 240 241 static const char *l1oip_revision = "2.00"; 242 243 static int l1oip_cnt; 244 static spinlock_t l1oip_lock; 245 static struct list_head l1oip_ilist; 246 247 #define MAX_CARDS 16 248 static u_int type[MAX_CARDS]; 249 static u_int codec[MAX_CARDS]; 250 static u_int ip[MAX_CARDS * 4]; 251 static u_int port[MAX_CARDS]; 252 static u_int remoteport[MAX_CARDS]; 253 static u_int ondemand[MAX_CARDS]; 254 static u_int limit[MAX_CARDS]; 255 static u_int id[MAX_CARDS]; 256 static int debug; 257 static int ulaw; 258 259 MODULE_AUTHOR("Andreas Eversberg"); 260 MODULE_LICENSE("GPL"); 261 module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR); 262 module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR); 263 module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR); 264 module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR); 265 module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR); 266 module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR); 267 module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR); 268 module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR); 269 module_param(ulaw, uint, S_IRUGO | S_IWUSR); 270 module_param(debug, uint, S_IRUGO | S_IWUSR); 271 272 /* 273 * send a frame via socket, if open and restart timer 274 */ 275 static int 276 l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask, 277 u16 timebase, u8 *buf, int len) 278 { 279 u8 *p; 280 u8 frame[len + 32]; 281 struct socket *socket = NULL; 282 283 if (debug & DEBUG_L1OIP_MSG) 284 printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n", 285 __func__, len); 286 287 p = frame; 288 289 /* restart timer */ 290 if (time_before(hc->keep_tl.expires, jiffies + 5 * HZ)) 291 mod_timer(&hc->keep_tl, jiffies + L1OIP_KEEPALIVE * HZ); 292 else 293 hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ; 294 295 if (debug & DEBUG_L1OIP_MSG) 296 printk(KERN_DEBUG "%s: resetting timer\n", __func__); 297 298 /* drop if we have no remote ip or port */ 299 if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) { 300 if (debug & DEBUG_L1OIP_MSG) 301 printk(KERN_DEBUG "%s: dropping frame, because remote " 302 "IP is not set.\n", __func__); 303 return len; 304 } 305 306 /* assemble frame */ 307 *p++ = (L1OIP_VERSION << 6) /* version and coding */ 308 | (hc->pri ? 0x20 : 0x00) /* type */ 309 | (hc->id ? 0x10 : 0x00) /* id */ 310 | localcodec; 311 if (hc->id) { 312 *p++ = hc->id >> 24; /* id */ 313 *p++ = hc->id >> 16; 314 *p++ = hc->id >> 8; 315 *p++ = hc->id; 316 } 317 *p++ = 0x00 + channel; /* m-flag, channel */ 318 *p++ = timebase >> 8; /* time base */ 319 *p++ = timebase; 320 321 if (buf && len) { /* add data to frame */ 322 if (localcodec == 1 && ulaw) 323 l1oip_ulaw_to_alaw(buf, len, p); 324 else if (localcodec == 2 && !ulaw) 325 l1oip_alaw_to_ulaw(buf, len, p); 326 else if (localcodec == 3) 327 len = l1oip_law_to_4bit(buf, len, p, 328 &hc->chan[channel].codecstate); 329 else 330 memcpy(p, buf, len); 331 } 332 len += p - frame; 333 334 /* check for socket in safe condition */ 335 spin_lock(&hc->socket_lock); 336 if (!hc->socket) { 337 spin_unlock(&hc->socket_lock); 338 return 0; 339 } 340 /* seize socket */ 341 socket = hc->socket; 342 hc->socket = NULL; 343 spin_unlock(&hc->socket_lock); 344 /* send packet */ 345 if (debug & DEBUG_L1OIP_MSG) 346 printk(KERN_DEBUG "%s: sending packet to socket (len " 347 "= %d)\n", __func__, len); 348 hc->sendiov.iov_base = frame; 349 hc->sendiov.iov_len = len; 350 len = kernel_sendmsg(socket, &hc->sendmsg, &hc->sendiov, 1, len); 351 /* give socket back */ 352 hc->socket = socket; /* no locking required */ 353 354 return len; 355 } 356 357 358 /* 359 * receive channel data from socket 360 */ 361 static void 362 l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase, 363 u8 *buf, int len) 364 { 365 struct sk_buff *nskb; 366 struct bchannel *bch; 367 struct dchannel *dch; 368 u8 *p; 369 u32 rx_counter; 370 371 if (len == 0) { 372 if (debug & DEBUG_L1OIP_MSG) 373 printk(KERN_DEBUG "%s: received empty keepalive data, " 374 "ignoring\n", __func__); 375 return; 376 } 377 378 if (debug & DEBUG_L1OIP_MSG) 379 printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n", 380 __func__, len); 381 382 if (channel < 1 || channel > 127) { 383 printk(KERN_WARNING "%s: packet error - channel %d out of " 384 "range\n", __func__, channel); 385 return; 386 } 387 dch = hc->chan[channel].dch; 388 bch = hc->chan[channel].bch; 389 if (!dch && !bch) { 390 printk(KERN_WARNING "%s: packet error - channel %d not in " 391 "stack\n", __func__, channel); 392 return; 393 } 394 395 /* prepare message */ 396 nskb = mI_alloc_skb((remotecodec == 3) ? (len << 1) : len, GFP_ATOMIC); 397 if (!nskb) { 398 printk(KERN_ERR "%s: No mem for skb.\n", __func__); 399 return; 400 } 401 p = skb_put(nskb, (remotecodec == 3) ? (len << 1) : len); 402 403 if (remotecodec == 1 && ulaw) 404 l1oip_alaw_to_ulaw(buf, len, p); 405 else if (remotecodec == 2 && !ulaw) 406 l1oip_ulaw_to_alaw(buf, len, p); 407 else if (remotecodec == 3) 408 len = l1oip_4bit_to_law(buf, len, p); 409 else 410 memcpy(p, buf, len); 411 412 /* send message up */ 413 if (dch && len >= 2) { 414 dch->rx_skb = nskb; 415 recv_Dchannel(dch); 416 } 417 if (bch) { 418 /* expand 16 bit sequence number to 32 bit sequence number */ 419 rx_counter = hc->chan[channel].rx_counter; 420 if (((s16)(timebase - rx_counter)) >= 0) { 421 /* time has changed forward */ 422 if (timebase >= (rx_counter & 0xffff)) 423 rx_counter = 424 (rx_counter & 0xffff0000) | timebase; 425 else 426 rx_counter = ((rx_counter & 0xffff0000) + 0x10000) 427 | timebase; 428 } else { 429 /* time has changed backwards */ 430 if (timebase < (rx_counter & 0xffff)) 431 rx_counter = 432 (rx_counter & 0xffff0000) | timebase; 433 else 434 rx_counter = ((rx_counter & 0xffff0000) - 0x10000) 435 | timebase; 436 } 437 hc->chan[channel].rx_counter = rx_counter; 438 439 #ifdef REORDER_DEBUG 440 if (hc->chan[channel].disorder_flag) { 441 struct sk_buff *skb; 442 int cnt; 443 skb = hc->chan[channel].disorder_skb; 444 hc->chan[channel].disorder_skb = nskb; 445 nskb = skb; 446 cnt = hc->chan[channel].disorder_cnt; 447 hc->chan[channel].disorder_cnt = rx_counter; 448 rx_counter = cnt; 449 } 450 hc->chan[channel].disorder_flag ^= 1; 451 if (nskb) 452 #endif 453 queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb); 454 } 455 } 456 457 458 /* 459 * parse frame and extract channel data 460 */ 461 static void 462 l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len) 463 { 464 u32 packet_id; 465 u8 channel; 466 u8 remotecodec; 467 u16 timebase; 468 int m, mlen; 469 int len_start = len; /* initial frame length */ 470 struct dchannel *dch = hc->chan[hc->d_idx].dch; 471 472 if (debug & DEBUG_L1OIP_MSG) 473 printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n", 474 __func__, len); 475 476 /* check length */ 477 if (len < 1 + 1 + 2) { 478 printk(KERN_WARNING "%s: packet error - length %d below " 479 "4 bytes\n", __func__, len); 480 return; 481 } 482 483 /* check version */ 484 if (((*buf) >> 6) != L1OIP_VERSION) { 485 printk(KERN_WARNING "%s: packet error - unknown version %d\n", 486 __func__, buf[0]>>6); 487 return; 488 } 489 490 /* check type */ 491 if (((*buf) & 0x20) && !hc->pri) { 492 printk(KERN_WARNING "%s: packet error - received E1 packet " 493 "on S0 interface\n", __func__); 494 return; 495 } 496 if (!((*buf) & 0x20) && hc->pri) { 497 printk(KERN_WARNING "%s: packet error - received S0 packet " 498 "on E1 interface\n", __func__); 499 return; 500 } 501 502 /* get id flag */ 503 packet_id = (*buf >> 4) & 1; 504 505 /* check coding */ 506 remotecodec = (*buf) & 0x0f; 507 if (remotecodec > 3) { 508 printk(KERN_WARNING "%s: packet error - remotecodec %d " 509 "unsupported\n", __func__, remotecodec); 510 return; 511 } 512 buf++; 513 len--; 514 515 /* check packet_id */ 516 if (packet_id) { 517 if (!hc->id) { 518 printk(KERN_WARNING "%s: packet error - packet has id " 519 "0x%x, but we have not\n", __func__, packet_id); 520 return; 521 } 522 if (len < 4) { 523 printk(KERN_WARNING "%s: packet error - packet too " 524 "short for ID value\n", __func__); 525 return; 526 } 527 packet_id = (*buf++) << 24; 528 packet_id += (*buf++) << 16; 529 packet_id += (*buf++) << 8; 530 packet_id += (*buf++); 531 len -= 4; 532 533 if (packet_id != hc->id) { 534 printk(KERN_WARNING "%s: packet error - ID mismatch, " 535 "got 0x%x, we 0x%x\n", 536 __func__, packet_id, hc->id); 537 return; 538 } 539 } else { 540 if (hc->id) { 541 printk(KERN_WARNING "%s: packet error - packet has no " 542 "ID, but we have\n", __func__); 543 return; 544 } 545 } 546 547 multiframe: 548 if (len < 1) { 549 printk(KERN_WARNING "%s: packet error - packet too short, " 550 "channel expected at position %d.\n", 551 __func__, len-len_start + 1); 552 return; 553 } 554 555 /* get channel and multiframe flag */ 556 channel = *buf & 0x7f; 557 m = *buf >> 7; 558 buf++; 559 len--; 560 561 /* check length on multiframe */ 562 if (m) { 563 if (len < 1) { 564 printk(KERN_WARNING "%s: packet error - packet too " 565 "short, length expected at position %d.\n", 566 __func__, len_start - len - 1); 567 return; 568 } 569 570 mlen = *buf++; 571 len--; 572 if (mlen == 0) 573 mlen = 256; 574 if (len < mlen + 3) { 575 printk(KERN_WARNING "%s: packet error - length %d at " 576 "position %d exceeds total length %d.\n", 577 __func__, mlen, len_start-len - 1, len_start); 578 return; 579 } 580 if (len == mlen + 3) { 581 printk(KERN_WARNING "%s: packet error - length %d at " 582 "position %d will not allow additional " 583 "packet.\n", 584 __func__, mlen, len_start-len + 1); 585 return; 586 } 587 } else 588 mlen = len - 2; /* single frame, subtract timebase */ 589 590 if (len < 2) { 591 printk(KERN_WARNING "%s: packet error - packet too short, time " 592 "base expected at position %d.\n", 593 __func__, len-len_start + 1); 594 return; 595 } 596 597 /* get time base */ 598 timebase = (*buf++) << 8; 599 timebase |= (*buf++); 600 len -= 2; 601 602 /* if inactive, we send up a PH_ACTIVATE and activate */ 603 if (!test_bit(FLG_ACTIVE, &dch->Flags)) { 604 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 605 printk(KERN_DEBUG "%s: interface become active due to " 606 "received packet\n", __func__); 607 test_and_set_bit(FLG_ACTIVE, &dch->Flags); 608 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, 609 NULL, GFP_ATOMIC); 610 } 611 612 /* distribute packet */ 613 l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen); 614 buf += mlen; 615 len -= mlen; 616 617 /* multiframe */ 618 if (m) 619 goto multiframe; 620 621 /* restart timer */ 622 if (time_before(hc->timeout_tl.expires, jiffies + 5 * HZ) || !hc->timeout_on) { 623 hc->timeout_on = 1; 624 mod_timer(&hc->timeout_tl, jiffies + L1OIP_TIMEOUT * HZ); 625 } else /* only adjust timer */ 626 hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ; 627 628 /* if ip or source port changes */ 629 if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr) 630 || (hc->sin_remote.sin_port != sin->sin_port)) { 631 if (debug & DEBUG_L1OIP_SOCKET) 632 printk(KERN_DEBUG "%s: remote address changes from " 633 "0x%08x to 0x%08x (port %d to %d)\n", __func__, 634 ntohl(hc->sin_remote.sin_addr.s_addr), 635 ntohl(sin->sin_addr.s_addr), 636 ntohs(hc->sin_remote.sin_port), 637 ntohs(sin->sin_port)); 638 hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr; 639 hc->sin_remote.sin_port = sin->sin_port; 640 } 641 } 642 643 644 /* 645 * socket stuff 646 */ 647 static int 648 l1oip_socket_thread(void *data) 649 { 650 struct l1oip *hc = (struct l1oip *)data; 651 int ret = 0; 652 struct msghdr msg; 653 struct sockaddr_in sin_rx; 654 unsigned char *recvbuf; 655 size_t recvbuf_size = 1500; 656 int recvlen; 657 struct socket *socket = NULL; 658 DECLARE_COMPLETION_ONSTACK(wait); 659 660 /* allocate buffer memory */ 661 recvbuf = kmalloc(recvbuf_size, GFP_KERNEL); 662 if (!recvbuf) { 663 printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__); 664 ret = -ENOMEM; 665 goto fail; 666 } 667 668 /* make daemon */ 669 allow_signal(SIGTERM); 670 671 /* create socket */ 672 if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) { 673 printk(KERN_ERR "%s: Failed to create socket.\n", __func__); 674 ret = -EIO; 675 goto fail; 676 } 677 678 /* set incoming address */ 679 hc->sin_local.sin_family = AF_INET; 680 hc->sin_local.sin_addr.s_addr = INADDR_ANY; 681 hc->sin_local.sin_port = htons((unsigned short)hc->localport); 682 683 /* set outgoing address */ 684 hc->sin_remote.sin_family = AF_INET; 685 hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip); 686 hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport); 687 688 /* bind to incoming port */ 689 if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local, 690 sizeof(hc->sin_local))) { 691 printk(KERN_ERR "%s: Failed to bind socket to port %d.\n", 692 __func__, hc->localport); 693 ret = -EINVAL; 694 goto fail; 695 } 696 697 /* check sk */ 698 if (socket->sk == NULL) { 699 printk(KERN_ERR "%s: socket->sk == NULL\n", __func__); 700 ret = -EIO; 701 goto fail; 702 } 703 704 /* build receive message */ 705 msg.msg_name = &sin_rx; 706 msg.msg_namelen = sizeof(sin_rx); 707 msg.msg_control = NULL; 708 msg.msg_controllen = 0; 709 710 /* build send message */ 711 hc->sendmsg.msg_name = &hc->sin_remote; 712 hc->sendmsg.msg_namelen = sizeof(hc->sin_remote); 713 hc->sendmsg.msg_control = NULL; 714 hc->sendmsg.msg_controllen = 0; 715 716 /* give away socket */ 717 spin_lock(&hc->socket_lock); 718 hc->socket = socket; 719 spin_unlock(&hc->socket_lock); 720 721 /* read loop */ 722 if (debug & DEBUG_L1OIP_SOCKET) 723 printk(KERN_DEBUG "%s: socket created and open\n", 724 __func__); 725 while (!signal_pending(current)) { 726 struct kvec iov = { 727 .iov_base = recvbuf, 728 .iov_len = recvbuf_size, 729 }; 730 recvlen = kernel_recvmsg(socket, &msg, &iov, 1, 731 recvbuf_size, 0); 732 if (recvlen > 0) { 733 l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen); 734 } else { 735 if (debug & DEBUG_L1OIP_SOCKET) 736 printk(KERN_WARNING 737 "%s: broken pipe on socket\n", __func__); 738 } 739 } 740 741 /* get socket back, check first if in use, maybe by send function */ 742 spin_lock(&hc->socket_lock); 743 /* if hc->socket is NULL, it is in use until it is given back */ 744 while (!hc->socket) { 745 spin_unlock(&hc->socket_lock); 746 schedule_timeout(HZ / 10); 747 spin_lock(&hc->socket_lock); 748 } 749 hc->socket = NULL; 750 spin_unlock(&hc->socket_lock); 751 752 if (debug & DEBUG_L1OIP_SOCKET) 753 printk(KERN_DEBUG "%s: socket thread terminating\n", 754 __func__); 755 756 fail: 757 /* free recvbuf */ 758 kfree(recvbuf); 759 760 /* close socket */ 761 if (socket) 762 sock_release(socket); 763 764 /* if we got killed, signal completion */ 765 complete(&hc->socket_complete); 766 hc->socket_thread = NULL; /* show termination of thread */ 767 768 if (debug & DEBUG_L1OIP_SOCKET) 769 printk(KERN_DEBUG "%s: socket thread terminated\n", 770 __func__); 771 return ret; 772 } 773 774 static void 775 l1oip_socket_close(struct l1oip *hc) 776 { 777 struct dchannel *dch = hc->chan[hc->d_idx].dch; 778 779 /* kill thread */ 780 if (hc->socket_thread) { 781 if (debug & DEBUG_L1OIP_SOCKET) 782 printk(KERN_DEBUG "%s: socket thread exists, " 783 "killing...\n", __func__); 784 send_sig(SIGTERM, hc->socket_thread, 0); 785 wait_for_completion(&hc->socket_complete); 786 } 787 788 /* if active, we send up a PH_DEACTIVATE and deactivate */ 789 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 790 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 791 printk(KERN_DEBUG "%s: interface become deactivated " 792 "due to timeout\n", __func__); 793 test_and_clear_bit(FLG_ACTIVE, &dch->Flags); 794 _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 795 NULL, GFP_ATOMIC); 796 } 797 } 798 799 static int 800 l1oip_socket_open(struct l1oip *hc) 801 { 802 /* in case of reopen, we need to close first */ 803 l1oip_socket_close(hc); 804 805 init_completion(&hc->socket_complete); 806 807 /* create receive process */ 808 hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s", 809 hc->name); 810 if (IS_ERR(hc->socket_thread)) { 811 int err = PTR_ERR(hc->socket_thread); 812 printk(KERN_ERR "%s: Failed (%d) to create socket process.\n", 813 __func__, err); 814 hc->socket_thread = NULL; 815 sock_release(hc->socket); 816 return err; 817 } 818 if (debug & DEBUG_L1OIP_SOCKET) 819 printk(KERN_DEBUG "%s: socket thread created\n", __func__); 820 821 return 0; 822 } 823 824 825 static void 826 l1oip_send_bh(struct work_struct *work) 827 { 828 struct l1oip *hc = container_of(work, struct l1oip, workq); 829 830 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 831 printk(KERN_DEBUG "%s: keepalive timer expired, sending empty " 832 "frame on dchannel\n", __func__); 833 834 /* send an empty l1oip frame at D-channel */ 835 l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0); 836 } 837 838 839 /* 840 * timer stuff 841 */ 842 static void 843 l1oip_keepalive(void *data) 844 { 845 struct l1oip *hc = (struct l1oip *)data; 846 847 schedule_work(&hc->workq); 848 } 849 850 static void 851 l1oip_timeout(void *data) 852 { 853 struct l1oip *hc = (struct l1oip *)data; 854 struct dchannel *dch = hc->chan[hc->d_idx].dch; 855 856 if (debug & DEBUG_L1OIP_MSG) 857 printk(KERN_DEBUG "%s: timeout timer expired, turn layer one " 858 "down.\n", __func__); 859 860 hc->timeout_on = 0; /* state that timer must be initialized next time */ 861 862 /* if timeout, we send up a PH_DEACTIVATE and deactivate */ 863 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 864 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 865 printk(KERN_DEBUG "%s: interface become deactivated " 866 "due to timeout\n", __func__); 867 test_and_clear_bit(FLG_ACTIVE, &dch->Flags); 868 _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 869 NULL, GFP_ATOMIC); 870 } 871 872 /* if we have ondemand set, we remove ip address */ 873 if (hc->ondemand) { 874 if (debug & DEBUG_L1OIP_MSG) 875 printk(KERN_DEBUG "%s: on demand causes ip address to " 876 "be removed\n", __func__); 877 hc->sin_remote.sin_addr.s_addr = 0; 878 } 879 } 880 881 882 /* 883 * message handling 884 */ 885 static int 886 handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb) 887 { 888 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 889 struct dchannel *dch = container_of(dev, struct dchannel, dev); 890 struct l1oip *hc = dch->hw; 891 struct mISDNhead *hh = mISDN_HEAD_P(skb); 892 int ret = -EINVAL; 893 int l, ll; 894 unsigned char *p; 895 896 switch (hh->prim) { 897 case PH_DATA_REQ: 898 if (skb->len < 1) { 899 printk(KERN_WARNING "%s: skb too small\n", 900 __func__); 901 break; 902 } 903 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { 904 printk(KERN_WARNING "%s: skb too large\n", 905 __func__); 906 break; 907 } 908 /* send frame */ 909 p = skb->data; 910 l = skb->len; 911 while (l) { 912 ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; 913 l1oip_socket_send(hc, 0, dch->slot, 0, 914 hc->chan[dch->slot].tx_counter++, p, ll); 915 p += ll; 916 l -= ll; 917 } 918 skb_trim(skb, 0); 919 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 920 return 0; 921 case PH_ACTIVATE_REQ: 922 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 923 printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" 924 , __func__, dch->slot, hc->b_num + 1); 925 skb_trim(skb, 0); 926 if (test_bit(FLG_ACTIVE, &dch->Flags)) 927 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); 928 else 929 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); 930 return 0; 931 case PH_DEACTIVATE_REQ: 932 if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) 933 printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " 934 "(1..%d)\n", __func__, dch->slot, 935 hc->b_num + 1); 936 skb_trim(skb, 0); 937 if (test_bit(FLG_ACTIVE, &dch->Flags)) 938 queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); 939 else 940 queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); 941 return 0; 942 } 943 if (!ret) 944 dev_kfree_skb(skb); 945 return ret; 946 } 947 948 static int 949 channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq) 950 { 951 int ret = 0; 952 struct l1oip *hc = dch->hw; 953 954 switch (cq->op) { 955 case MISDN_CTRL_GETOP: 956 cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER 957 | MISDN_CTRL_GETPEER; 958 break; 959 case MISDN_CTRL_SETPEER: 960 hc->remoteip = (u32)cq->p1; 961 hc->remoteport = cq->p2 & 0xffff; 962 hc->localport = cq->p2 >> 16; 963 if (!hc->remoteport) 964 hc->remoteport = hc->localport; 965 if (debug & DEBUG_L1OIP_SOCKET) 966 printk(KERN_DEBUG "%s: got new ip address from user " 967 "space.\n", __func__); 968 l1oip_socket_open(hc); 969 break; 970 case MISDN_CTRL_UNSETPEER: 971 if (debug & DEBUG_L1OIP_SOCKET) 972 printk(KERN_DEBUG "%s: removing ip address.\n", 973 __func__); 974 hc->remoteip = 0; 975 l1oip_socket_open(hc); 976 break; 977 case MISDN_CTRL_GETPEER: 978 if (debug & DEBUG_L1OIP_SOCKET) 979 printk(KERN_DEBUG "%s: getting ip address.\n", 980 __func__); 981 cq->p1 = hc->remoteip; 982 cq->p2 = hc->remoteport | (hc->localport << 16); 983 break; 984 default: 985 printk(KERN_WARNING "%s: unknown Op %x\n", 986 __func__, cq->op); 987 ret = -EINVAL; 988 break; 989 } 990 return ret; 991 } 992 993 static int 994 open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) 995 { 996 if (debug & DEBUG_HW_OPEN) 997 printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__, 998 dch->dev.id, __builtin_return_address(0)); 999 if (rq->protocol == ISDN_P_NONE) 1000 return -EINVAL; 1001 if ((dch->dev.D.protocol != ISDN_P_NONE) && 1002 (dch->dev.D.protocol != rq->protocol)) { 1003 if (debug & DEBUG_HW_OPEN) 1004 printk(KERN_WARNING "%s: change protocol %x to %x\n", 1005 __func__, dch->dev.D.protocol, rq->protocol); 1006 } 1007 if (dch->dev.D.protocol != rq->protocol) 1008 dch->dev.D.protocol = rq->protocol; 1009 1010 if (test_bit(FLG_ACTIVE, &dch->Flags)) { 1011 _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 1012 0, NULL, GFP_KERNEL); 1013 } 1014 rq->ch = &dch->dev.D; 1015 if (!try_module_get(THIS_MODULE)) 1016 printk(KERN_WARNING "%s:cannot get module\n", __func__); 1017 return 0; 1018 } 1019 1020 static int 1021 open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) 1022 { 1023 struct bchannel *bch; 1024 int ch; 1025 1026 if (!test_channelmap(rq->adr.channel, dch->dev.channelmap)) 1027 return -EINVAL; 1028 if (rq->protocol == ISDN_P_NONE) 1029 return -EINVAL; 1030 ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */ 1031 bch = hc->chan[ch].bch; 1032 if (!bch) { 1033 printk(KERN_ERR "%s:internal error ch %d has no bch\n", 1034 __func__, ch); 1035 return -EINVAL; 1036 } 1037 if (test_and_set_bit(FLG_OPEN, &bch->Flags)) 1038 return -EBUSY; /* b-channel can be only open once */ 1039 bch->ch.protocol = rq->protocol; 1040 rq->ch = &bch->ch; 1041 if (!try_module_get(THIS_MODULE)) 1042 printk(KERN_WARNING "%s:cannot get module\n", __func__); 1043 return 0; 1044 } 1045 1046 static int 1047 l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg) 1048 { 1049 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 1050 struct dchannel *dch = container_of(dev, struct dchannel, dev); 1051 struct l1oip *hc = dch->hw; 1052 struct channel_req *rq; 1053 int err = 0; 1054 1055 if (dch->debug & DEBUG_HW) 1056 printk(KERN_DEBUG "%s: cmd:%x %p\n", 1057 __func__, cmd, arg); 1058 switch (cmd) { 1059 case OPEN_CHANNEL: 1060 rq = arg; 1061 switch (rq->protocol) { 1062 case ISDN_P_TE_S0: 1063 case ISDN_P_NT_S0: 1064 if (hc->pri) { 1065 err = -EINVAL; 1066 break; 1067 } 1068 err = open_dchannel(hc, dch, rq); 1069 break; 1070 case ISDN_P_TE_E1: 1071 case ISDN_P_NT_E1: 1072 if (!hc->pri) { 1073 err = -EINVAL; 1074 break; 1075 } 1076 err = open_dchannel(hc, dch, rq); 1077 break; 1078 default: 1079 err = open_bchannel(hc, dch, rq); 1080 } 1081 break; 1082 case CLOSE_CHANNEL: 1083 if (debug & DEBUG_HW_OPEN) 1084 printk(KERN_DEBUG "%s: dev(%d) close from %p\n", 1085 __func__, dch->dev.id, 1086 __builtin_return_address(0)); 1087 module_put(THIS_MODULE); 1088 break; 1089 case CONTROL_CHANNEL: 1090 err = channel_dctrl(dch, arg); 1091 break; 1092 default: 1093 if (dch->debug & DEBUG_HW) 1094 printk(KERN_DEBUG "%s: unknown command %x\n", 1095 __func__, cmd); 1096 err = -EINVAL; 1097 } 1098 return err; 1099 } 1100 1101 static int 1102 handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb) 1103 { 1104 struct bchannel *bch = container_of(ch, struct bchannel, ch); 1105 struct l1oip *hc = bch->hw; 1106 int ret = -EINVAL; 1107 struct mISDNhead *hh = mISDN_HEAD_P(skb); 1108 int l, ll; 1109 unsigned char *p; 1110 1111 switch (hh->prim) { 1112 case PH_DATA_REQ: 1113 if (skb->len <= 0) { 1114 printk(KERN_WARNING "%s: skb too small\n", 1115 __func__); 1116 break; 1117 } 1118 if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { 1119 printk(KERN_WARNING "%s: skb too large\n", 1120 __func__); 1121 break; 1122 } 1123 /* check for AIS / ulaw-silence */ 1124 l = skb->len; 1125 if (!memchr_inv(skb->data, 0xff, l)) { 1126 if (debug & DEBUG_L1OIP_MSG) 1127 printk(KERN_DEBUG "%s: got AIS, not sending, " 1128 "but counting\n", __func__); 1129 hc->chan[bch->slot].tx_counter += l; 1130 skb_trim(skb, 0); 1131 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 1132 return 0; 1133 } 1134 /* check for silence */ 1135 l = skb->len; 1136 if (!memchr_inv(skb->data, 0x2a, l)) { 1137 if (debug & DEBUG_L1OIP_MSG) 1138 printk(KERN_DEBUG "%s: got silence, not sending" 1139 ", but counting\n", __func__); 1140 hc->chan[bch->slot].tx_counter += l; 1141 skb_trim(skb, 0); 1142 queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); 1143 return 0; 1144 } 1145 1146 /* send frame */ 1147 p = skb->data; 1148 l = skb->len; 1149 while (l) { 1150 ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; 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 hc->keep_tl.function = (void *)l1oip_keepalive; 1439 hc->keep_tl.data = (ulong)hc; 1440 init_timer(&hc->keep_tl); 1441 hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */ 1442 add_timer(&hc->keep_tl); 1443 1444 hc->timeout_tl.function = (void *)l1oip_timeout; 1445 hc->timeout_tl.data = (ulong)hc; 1446 init_timer(&hc->timeout_tl); 1447 hc->timeout_on = 0; /* state that we have timer off */ 1448 1449 return 0; 1450 } 1451 1452 static int __init 1453 l1oip_init(void) 1454 { 1455 int pri, bundle; 1456 struct l1oip *hc; 1457 int ret; 1458 1459 printk(KERN_INFO "mISDN: Layer-1-over-IP driver Rev. %s\n", 1460 l1oip_revision); 1461 1462 INIT_LIST_HEAD(&l1oip_ilist); 1463 spin_lock_init(&l1oip_lock); 1464 1465 if (l1oip_4bit_alloc(ulaw)) 1466 return -ENOMEM; 1467 1468 l1oip_cnt = 0; 1469 while (l1oip_cnt < MAX_CARDS && type[l1oip_cnt]) { 1470 switch (type[l1oip_cnt] & 0xff) { 1471 case 1: 1472 pri = 0; 1473 bundle = 0; 1474 break; 1475 case 2: 1476 pri = 1; 1477 bundle = 0; 1478 break; 1479 case 3: 1480 pri = 0; 1481 bundle = 1; 1482 break; 1483 case 4: 1484 pri = 1; 1485 bundle = 1; 1486 break; 1487 default: 1488 printk(KERN_ERR "Card type(%d) not supported.\n", 1489 type[l1oip_cnt] & 0xff); 1490 l1oip_cleanup(); 1491 return -EINVAL; 1492 } 1493 1494 if (debug & DEBUG_L1OIP_INIT) 1495 printk(KERN_DEBUG "%s: interface %d is %s with %s.\n", 1496 __func__, l1oip_cnt, pri ? "PRI" : "BRI", 1497 bundle ? "bundled IP packet for all B-channels" : 1498 "separate IP packets for every B-channel"); 1499 1500 hc = kzalloc(sizeof(struct l1oip), GFP_ATOMIC); 1501 if (!hc) { 1502 printk(KERN_ERR "No kmem for L1-over-IP driver.\n"); 1503 l1oip_cleanup(); 1504 return -ENOMEM; 1505 } 1506 INIT_WORK(&hc->workq, (void *)l1oip_send_bh); 1507 1508 spin_lock(&l1oip_lock); 1509 list_add_tail(&hc->list, &l1oip_ilist); 1510 spin_unlock(&l1oip_lock); 1511 1512 ret = init_card(hc, pri, bundle); 1513 if (ret) { 1514 l1oip_cleanup(); 1515 return ret; 1516 } 1517 1518 l1oip_cnt++; 1519 } 1520 printk(KERN_INFO "%d virtual devices registered\n", l1oip_cnt); 1521 return 0; 1522 } 1523 1524 module_init(l1oip_init); 1525 module_exit(l1oip_cleanup); 1526