sys/netbt/rfcomm_socket.c

   1 /* $DragonFly: src/sys/netbt/rfcomm_socket.c,v 1.3 2008/06/20 20:52:29 aggelos Exp $ */
   2 /* $OpenBSD: src/sys/netbt/rfcomm_socket.c,v 1.2 2008/02/24 21:34:48 uwe Exp $ */
   3 /* $NetBSD: rfcomm_socket.c,v 1.8 2007/10/15 18:04:34 plunky Exp $ */
   4
   5 /*-
   6  * Copyright (c) 2006 Itronix Inc.
   7  * All rights reserved.
   8  *
   9  * Written by Iain Hibbert for Itronix Inc.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of Itronix Inc. may not be used to endorse
  20  *    or promote products derived from this software without specific
  21  *    prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  27  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  30  * ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /* load symbolic names */
  37 #ifdef BLUETOOTH_DEBUG
  38 #define PRUREQUESTS
  39 #define PRCOREQUESTS
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/domain.h>
  44 #include <sys/kernel.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/proc.h>
  47 #include <sys/protosw.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <sys/systm.h>
  51 #include <vm/vm_zone.h>
  52
  53 #include <netbt/bluetooth.h>
  54 #include <netbt/hci.h>          /* XXX for EPASSTHROUGH */
  55 #include <netbt/rfcomm.h>
  56
  57 /****************************************************************************
  58  *
  59  *      RFCOMM SOCK_STREAM Sockets - serial line emulation
  60  *
  61  */
  62
  63 static void rfcomm_connecting(void *);
  64 static void rfcomm_connected(void *);
  65 static void rfcomm_disconnected(void *, int);
  66 static void *rfcomm_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
  67 static void rfcomm_complete(void *, int);
  68 static void rfcomm_linkmode(void *, int);
  69 static void rfcomm_input(void *, struct mbuf *);
  70
  71 static const struct btproto rfcomm_proto = {
  72         rfcomm_connecting,
  73         rfcomm_connected,
  74         rfcomm_disconnected,
  75         rfcomm_newconn,
  76         rfcomm_complete,
  77         rfcomm_linkmode,
  78         rfcomm_input,
  79 };
  80
  81 /* sysctl variables */
  82 int rfcomm_sendspace = 4096;
  83 int rfcomm_recvspace = 4096;
  84
  85 /*
  86  * rfcomm_ctloutput(request, socket, level, optname, opt)
  87  *
  88  */
  89 int
  90 rfcomm_ctloutput(struct socket *so, struct sockopt *sopt)
  91 {
  92         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
  93         struct mbuf *m;
  94         int err = 0;
  95
  96 #ifdef notyet                   /* XXX */
  97         DPRINTFN(2, "%s\n", prcorequests[sopt->sopt_dir]);
  98 #endif
  99
 100         if (pcb == NULL)
 101                 return EINVAL;
 102
 103         if (sopt->sopt_level != BTPROTO_RFCOMM)
 104                 return ENOPROTOOPT;
 105
 106         switch(sopt->sopt_dir) {
 107         case PRCO_GETOPT:
 108                 m = m_get(M_WAITOK, MT_DATA);
 109                 crit_enter();
 110                 m->m_len = rfcomm_getopt(pcb, sopt->sopt_name, mtod(m, void *));
 111                 crit_exit();
 112                 if (m->m_len == 0) {
 113                         m_freem(m);
 114                         m = NULL;
 115                         err = ENOPROTOOPT;
 116                 }
 117                 soopt_from_kbuf(sopt, mtod(m, void *), m->m_len);
 118                 break;
 119
 120         case PRCO_SETOPT:
 121                 err = rfcomm_setopt2(pcb, sopt->sopt_name, so, sopt);
 122
 123                 break;
 124
 125         default:
 126                 err = ENOPROTOOPT;
 127                 break;
 128         }
 129
 130         return err;
 131 }
 132
 133 /**********************************************************************
 134  *
 135  * RFCOMM callbacks
 136  */
 137
 138 static void
 139 rfcomm_connecting(void *arg)
 140 {
 141         /* struct socket *so = arg; */
 142
 143         KKASSERT(arg != NULL);
 144         DPRINTF("Connecting\n");
 145 }
 146
 147 static void
 148 rfcomm_connected(void *arg)
 149 {
 150         struct socket *so = arg;
 151
 152         KKASSERT(so != NULL);
 153         DPRINTF("Connected\n");
 154         soisconnected(so);
 155 }
 156
 157 static void
 158 rfcomm_disconnected(void *arg, int err)
 159 {
 160         struct socket *so = arg;
 161
 162         KKASSERT(so != NULL);
 163         DPRINTF("Disconnected\n");
 164
 165         so->so_error = err;
 166         soisdisconnected(so);
 167 }
 168
 169 static void *
 170 rfcomm_newconn(void *arg, struct sockaddr_bt *laddr,
 171     struct sockaddr_bt *raddr)
 172 {
 173         struct socket *so = arg;
 174
 175         DPRINTF("New Connection\n");
 176         so = sonewconn(so, 0);
 177         if (so == NULL)
 178                 return NULL;
 179
 180         soisconnecting(so);
 181
 182         return so->so_pcb;
 183 }
 184
 185 /*
 186  * rfcomm_complete(rfcomm_dlc, length)
 187  *
 188  * length bytes are sent and may be removed from socket buffer
 189  */
 190 static void
 191 rfcomm_complete(void *arg, int length)
 192 {
 193         struct socket *so = arg;
 194
 195         sbdrop(&so->so_snd.sb, length);
 196         sowwakeup(so);
 197 }
 198
 199 /*
 200  * rfcomm_linkmode(rfcomm_dlc, new)
 201  *
 202  * link mode change notification.
 203  */
 204 static void
 205 rfcomm_linkmode(void *arg, int new)
 206 {
 207         struct socket *so = arg;
 208         int mode;
 209
 210         DPRINTF("auth %s, encrypt %s, secure %s\n",
 211                 (new & RFCOMM_LM_AUTH ? "on" : "off"),
 212                 (new & RFCOMM_LM_ENCRYPT ? "on" : "off"),
 213                 (new & RFCOMM_LM_SECURE ? "on" : "off"));
 214
 215         (void)rfcomm_getopt(so->so_pcb, SO_RFCOMM_LM, &mode);
 216         if (((mode & RFCOMM_LM_AUTH) && !(new & RFCOMM_LM_AUTH))
 217             || ((mode & RFCOMM_LM_ENCRYPT) && !(new & RFCOMM_LM_ENCRYPT))
 218             || ((mode & RFCOMM_LM_SECURE) && !(new & RFCOMM_LM_SECURE)))
 219                 rfcomm_disconnect(so->so_pcb, 0);
 220 }
 221
 222 /*
 223  * rfcomm_input(rfcomm_dlc, mbuf)
 224  */
 225 static void
 226 rfcomm_input(void *arg, struct mbuf *m)
 227 {
 228         struct socket *so = arg;
 229
 230         KKASSERT(so != NULL);
 231
 232         if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
 233                 kprintf("%s: %d bytes dropped (socket buffer full)\n",
 234                         __func__, m->m_pkthdr.len);
 235                 m_freem(m);
 236                 return;
 237         }
 238
 239         DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
 240
 241         sbappendstream(&so->so_rcv.sb, m);
 242         sorwakeup(so);
 243 }
 244
 245 /*
 246  * Implementation of usrreqs.
 247  */
 248 static int
 249 rfcomm_sdetach(struct socket *so)
 250 {
 251         return rfcomm_detach((struct rfcomm_dlc **)&so->so_pcb);
 252 }
 253
 254 static int
 255 rfcomm_sabort (struct socket *so)
 256 {
 257         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 258
 259         rfcomm_disconnect(pcb, 0);
 260         soisdisconnected(so);
 261         return rfcomm_sdetach(so);
 262 }
 263
 264 static int
 265 rfcomm_sdisconnect (struct socket *so)
 266 {
 267         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 268
 269         soisdisconnecting(so);
 270         return rfcomm_disconnect(pcb, so->so_linger);
 271 }
 272
 273 static int
 274 rfcomm_scontrol (struct socket *so, u_long cmd, caddr_t data,
 275                                     struct ifnet *ifp, struct thread *td)
 276 {
 277         return EPASSTHROUGH;
 278 }
 279
 280 static int
 281 rfcomm_sattach (struct socket *so, int proto,
 282                                struct pru_attach_info *ai)
 283 {
 284         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 285
 286         int err=0;
 287         if (pcb != NULL)
 288                 return EINVAL;
 289
 290         /*
 291          * Since we have nothing to add, we attach the DLC
 292          * structure directly to our PCB pointer.
 293          */
 294         err = soreserve(so, rfcomm_sendspace, rfcomm_recvspace, NULL);
 295         if (err)
 296                 return err;
 297
 298         err = rfcomm_attach((struct rfcomm_dlc **)&so->so_pcb,
 299             &rfcomm_proto, so);
 300         if (err)
 301                 return err;
 302
 303         err = rfcomm_rcvd(so->so_pcb, sbspace(&so->so_rcv));
 304         if (err) {
 305                 rfcomm_detach((struct rfcomm_dlc **)&so->so_pcb);
 306                 return err;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int
 313 rfcomm_sbind (struct socket *so, struct sockaddr *nam,
 314                                  struct thread *td)
 315 {
 316         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 317         struct sockaddr_bt *sa;
 318
 319         KKASSERT(nam != NULL);
 320         sa = (struct sockaddr_bt *)nam;
 321
 322         if (sa->bt_len != sizeof(struct sockaddr_bt))
 323                 return EINVAL;
 324
 325         if (sa->bt_family != AF_BLUETOOTH)
 326                 return EAFNOSUPPORT;
 327
 328         return rfcomm_bind(pcb, sa);
 329 }
 330
 331 static int
 332 rfcomm_sconnect (struct socket *so, struct sockaddr *nam,
 333                                     struct thread *td)
 334 {
 335         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 336         struct sockaddr_bt *sa;
 337
 338         KKASSERT(nam != NULL);
 339         sa = (struct sockaddr_bt *)nam;
 340
 341         if (sa->bt_len != sizeof(struct sockaddr_bt))
 342                 return EINVAL;
 343
 344         if (sa->bt_family != AF_BLUETOOTH)
 345                 return EAFNOSUPPORT;
 346
 347         soisconnecting(so);
 348         return rfcomm_connect(pcb, sa);
 349 }
 350
 351 static int
 352 rfcomm_speeraddr (struct socket *so, struct sockaddr **nam)
 353 {
 354         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 355         struct sockaddr_bt *sa, ssa;
 356         int e;
 357
 358         sa = &ssa;
 359         bzero(sa, sizeof *sa);
 360         sa->bt_len = sizeof(struct sockaddr_bt);
 361         sa->bt_family = AF_BLUETOOTH;
 362         e = rfcomm_peeraddr(pcb, sa);;
 363         *nam = dup_sockaddr((struct sockaddr *)sa);
 364         return (e);
 365 }
 366
 367 static int
 368 rfcomm_ssockaddr (struct socket *so, struct sockaddr **nam)
 369 {
 370         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 371         struct sockaddr_bt *sa, ssa;
 372         int e;
 373
 374         sa = &ssa;
 375         bzero(sa, sizeof *sa);
 376         sa->bt_len = sizeof(struct sockaddr_bt);
 377         sa->bt_family = AF_BLUETOOTH;
 378         e = rfcomm_sockaddr(pcb, sa);;
 379         *nam = dup_sockaddr((struct sockaddr *)sa);
 380         return (e);
 381 }
 382
 383 static int
 384 rfcomm_sshutdown (struct socket *so)
 385 {
 386         socantsendmore(so);
 387         return 0;
 388 }
 389
 390 static int
 391 rfcomm_ssend (struct socket *so, int flags, struct mbuf *m,
 392     struct sockaddr *addr, struct mbuf *control, struct thread *td)
 393 {
 394         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 395         struct mbuf *m0;
 396
 397         KKASSERT(m != NULL);
 398
 399         if (control)    /* no use for that */
 400                 m_freem(control);
 401
 402         m0 = m_copym(m, 0, M_COPYALL, MB_DONTWAIT);
 403         if (m0 == NULL)
 404                 return ENOMEM;
 405
 406         sbappendstream(&so->so_snd.sb, m);
 407
 408         return rfcomm_send(pcb, m0);
 409 }
 410
 411 static int
 412 rfcomm_saccept(struct socket *so, struct sockaddr **nam)
 413 {
 414         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 415         struct sockaddr_bt *sa, ssa;
 416         int e;
 417
 418         sa = &ssa;
 419         bzero(sa, sizeof *sa);
 420         sa->bt_len = sizeof(struct sockaddr_bt);
 421         sa->bt_family = AF_BLUETOOTH;
 422         e = rfcomm_peeraddr(pcb, sa);;
 423         *nam = dup_sockaddr((struct sockaddr *)sa);
 424         return (e);
 425 }
 426
 427 static int
 428 rfcomm_slisten(struct socket *so, struct thread *td)
 429 {
 430         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 431         return rfcomm_listen(pcb);
 432 }
 433
 434 static int
 435 rfcomm_srcvd(struct socket *so, int flags)
 436 {
 437         struct rfcomm_dlc *pcb = (struct rfcomm_dlc *) so->so_pcb;
 438         return rfcomm_rcvd(pcb, sbspace(&so->so_rcv));
 439 }
 440
 441 struct pr_usrreqs rfcomm_usrreqs = {
 442         .pru_abort = rfcomm_sabort,
 443         .pru_accept = rfcomm_saccept,
 444         .pru_attach = rfcomm_sattach,
 445         .pru_bind = rfcomm_sbind,
 446         .pru_connect = rfcomm_sconnect,
 447         .pru_connect2 = pru_connect2_notsupp,
 448         .pru_control = rfcomm_scontrol,
 449         .pru_detach = rfcomm_sdetach,
 450         .pru_disconnect = rfcomm_sdisconnect,
 451         .pru_listen = rfcomm_slisten,
 452         .pru_peeraddr = rfcomm_speeraddr,
 453         .pru_rcvd = rfcomm_srcvd,
 454         .pru_rcvoob = pru_rcvoob_notsupp,
 455         .pru_send = rfcomm_ssend,
 456         .pru_sense = pru_sense_null,
 457         .pru_shutdown = rfcomm_sshutdown,
 458         .pru_sockaddr = rfcomm_ssockaddr,
 459         .pru_sosend = sosend,
 460         .pru_soreceive = soreceive,
 461         .pru_sopoll = sopoll
 462 };