src/rx/rx_kcommon.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * rx_kcommon.c - Common kernel RX code for all system types.
  12  */
  13
  14 #include <afsconfig.h>
  15 #include <afs/param.h>
  16
  17
  18 #include "rx/rx_kcommon.h"
  19 #include "rx_atomic.h"
  20 #include "rx_packet.h"
  21 #include "rx_internal.h"
  22 #include "rx_stats.h"
  23 #include "rx_peer.h"
  24
  25 #ifdef AFS_HPUX110_ENV
  26 #include "h/tihdr.h"
  27 #include <xti.h>
  28 #endif
  29 #include "afsint.h"
  30
  31 #ifndef RXK_LISTENER_ENV
  32 int (*rxk_PacketArrivalProc) (struct rx_packet * ahandle, struct sockaddr_in * afrom, struct socket *arock, afs_int32 asize);   /* set to packet allocation procedure */
  33 int (*rxk_GetPacketProc) (struct rx_packet **ahandle, int asize);
  34 #endif
  35
  36 osi_socket *rxk_NewSocketHost(afs_uint32 ahost, short aport);
  37 extern struct interfaceAddr afs_cb_interface;
  38
  39 rxk_ports_t rxk_ports;
  40 rxk_portRocks_t rxk_portRocks;
  41
  42 int rxk_initDone = 0;
  43
  44 #if !defined(AFS_SUN5_ENV) && !defined(AFS_SGI62_ENV)
  45 #define ADDRSPERSITE 16
  46 static afs_uint32 myNetAddrs[ADDRSPERSITE];
  47 static int myNetMTUs[ADDRSPERSITE];
  48 static int numMyNetAddrs = 0;
  49 #endif
  50
  51 #if defined(AFS_DARWIN80_ENV)
  52 #define sobind sock_bind
  53 #define soclose sock_close
  54 #endif
  55
  56 /* add a port to the monitored list, port # is in network order */
  57 static int
  58 rxk_AddPort(u_short aport, char *arock)
  59 {
  60     int i;
  61     unsigned short *tsp, ts;
  62     int zslot;
  63
  64     zslot = -1;                 /* look for an empty slot simultaneously */
  65     for (i = 0, tsp = rxk_ports; i < MAXRXPORTS; i++, tsp++) {
  66         if (((ts = *tsp) == 0) && (zslot == -1))
  67             zslot = i;
  68         if (ts == aport) {
  69             return 0;
  70         }
  71     }
  72     /* otherwise allocate a new port slot */
  73     if (zslot < 0)
  74         return E2BIG;           /* all full */
  75     rxk_ports[zslot] = aport;
  76     rxk_portRocks[zslot] = arock;
  77     return 0;
  78 }
  79
  80 /* remove as port from the monitored list, port # is in network order */
  81 int
  82 rxk_DelPort(u_short aport)
  83 {
  84     int i;
  85     unsigned short *tsp;
  86
  87     for (i = 0, tsp = rxk_ports; i < MAXRXPORTS; i++, tsp++) {
  88         if (*tsp == aport) {
  89             /* found it, adjust ref count and free the port reference if all gone */
  90             *tsp = 0;
  91             return 0;
  92         }
  93     }
  94     /* otherwise port not found */
  95     return ENOENT;
  96 }
  97
  98 void
  99 rxk_shutdownPorts(void)
 100 {
 101     int i;
 102     for (i = 0; i < MAXRXPORTS; i++) {
 103         if (rxk_ports[i]) {
 104             rxk_ports[i] = 0;
 105 #if ! defined(AFS_SUN5_ENV) && ! defined(UKERNEL) && ! defined(RXK_LISTENER_ENV)
 106             soclose((struct socket *)rxk_portRocks[i]);
 107 #endif
 108             rxk_portRocks[i] = NULL;
 109         }
 110     }
 111 }
 112
 113 osi_socket
 114 rxi_GetHostUDPSocket(u_int host, u_short port)
 115 {
 116     osi_socket *sockp;
 117     sockp = (osi_socket *)rxk_NewSocketHost(host, port);
 118     if (sockp == (osi_socket *)0)
 119         return OSI_NULLSOCKET;
 120     rxk_AddPort(port, (char *)sockp);
 121     return (osi_socket) sockp;
 122 }
 123
 124 osi_socket
 125 rxi_GetUDPSocket(u_short port)
 126 {
 127     return rxi_GetHostUDPSocket(htonl(INADDR_ANY), port);
 128 }
 129
 130 /*
 131  * osi_utoa() - write the NUL-terminated ASCII decimal form of the given
 132  * unsigned long value into the given buffer.  Returns 0 on success,
 133  * and a value less than 0 on failure.  The contents of the buffer is
 134  * defined only on success.
 135  */
 136
 137 int
 138 osi_utoa(char *buf, size_t len, unsigned long val)
 139 {
 140     long k;                     /* index of first byte of string value */
 141
 142     /* we definitely need room for at least one digit and NUL */
 143
 144     if (len < 2) {
 145         return -1;
 146     }
 147
 148     /* compute the string form from the high end of the buffer */
 149
 150     buf[len - 1] = '\0';
 151     for (k = len - 2; k >= 0; k--) {
 152         buf[k] = val % 10 + '0';
 153         val /= 10;
 154
 155         if (val == 0)
 156             break;
 157     }
 158
 159     /* did we finish converting val to string form? */
 160
 161     if (val != 0) {
 162         return -2;
 163     }
 164
 165     /* this should never happen */
 166
 167     if (k < 0) {
 168         return -3;
 169     }
 170
 171     /* this should never happen */
 172
 173     if (k >= len) {
 174         return -4;
 175     }
 176
 177     /* if necessary, relocate string to beginning of buf[] */
 178
 179     if (k > 0) {
 180
 181         /*
 182          * We need to achieve the effect of calling
 183          *
 184          * memmove(buf, &buf[k], len - k);
 185          *
 186          * However, since memmove() is not available in all
 187          * kernels, we explicitly do an appropriate copy.
 188          */
 189
 190         char *dst = buf;
 191         char *src = buf + k;
 192
 193         while ((*dst++ = *src++) != '\0')
 194             continue;
 195     }
 196
 197     return 0;
 198 }
 199
 200 #ifndef AFS_LINUX26_ENV
 201 /*
 202  * osi_AssertFailK() -- used by the osi_Assert() macro.
 203  *
 204  * It essentially does
 205  *
 206  * osi_Panic("assertion failed: %s, file: %s, line: %d", expr, file, line);
 207  *
 208  * Since the kernel version of osi_Panic() only passes its first
 209  * argument to the native panic(), we construct a single string and hand
 210  * that to osi_Panic().
 211  */
 212 void
 213 osi_AssertFailK(const char *expr, const char *file, int line)
 214 {
 215     static const char msg0[] = "assertion failed: ";
 216     static const char msg1[] = ", file: ";
 217     static const char msg2[] = ", line: ";
 218     static const char msg3[] = "\n";
 219
 220     /*
 221      * These buffers add up to 1K, which is a pleasantly nice round
 222      * value, but probably not vital.
 223      */
 224     char buf[1008];
 225     char linebuf[16];
 226
 227     /* check line number conversion */
 228
 229     if (osi_utoa(linebuf, sizeof linebuf, line) < 0) {
 230         osi_Panic("osi_AssertFailK: error in osi_utoa()\n");
 231     }
 232
 233     /* okay, panic */
 234
 235 #define ADDBUF(BUF, STR)                                        \
 236         if (strlen(BUF) + strlen((char *)(STR)) + 1 <= sizeof BUF) {    \
 237                 strcat(BUF, (char *)(STR));                             \
 238         }
 239
 240     buf[0] = '\0';
 241     ADDBUF(buf, msg0);
 242     ADDBUF(buf, expr);
 243     ADDBUF(buf, msg1);
 244     ADDBUF(buf, file);
 245     ADDBUF(buf, msg2);
 246     ADDBUF(buf, linebuf);
 247     ADDBUF(buf, msg3);
 248
 249 #undef ADDBUF
 250
 251     osi_Panic("%s", buf);
 252 }
 253 #endif
 254
 255 #ifndef UKERNEL
 256 /* This is the server process request loop. Kernel server
 257  * processes never become listener threads */
 258 void *
 259 rx_ServerProc(void *unused)
 260 {
 261     int threadID;
 262
 263     rxi_MorePackets(rx_maxReceiveWindow + 2);   /* alloc more packets */
 264     MUTEX_ENTER(&rx_quota_mutex);
 265     rxi_dataQuota += rx_initSendWindow; /* Reserve some pkts for hard times */
 266     /* threadID is used for making decisions in GetCall.  Get it by bumping
 267      * number of threads handling incoming calls */
 268     threadID = rxi_availProcs++;
 269     MUTEX_EXIT(&rx_quota_mutex);
 270
 271 #ifdef RX_ENABLE_LOCKS
 272     AFS_GUNLOCK();
 273 #endif /* RX_ENABLE_LOCKS */
 274     rxi_ServerProc(threadID, NULL, NULL);
 275 #ifdef RX_ENABLE_LOCKS
 276     AFS_GLOCK();
 277 #endif /* RX_ENABLE_LOCKS */
 278
 279     return NULL;
 280 }
 281 #endif /* !UKERNEL */
 282
 283 #ifndef RXK_LISTENER_ENV
 284 /* asize includes the Rx header */
 285 static int
 286 MyPacketProc(struct rx_packet **ahandle, int asize)
 287 {
 288     struct rx_packet *tp;
 289
 290     /* If this is larger than we expected, increase rx_maxReceiveDataSize */
 291     /* If we can't scrounge enough cbufs, then we have to drop the packet,
 292      * but we should set a flag so we magic up some more at our leisure.
 293      */
 294
 295     if ((asize >= 0) && (asize <= RX_MAX_PACKET_SIZE)) {
 296         tp = rxi_AllocPacket(RX_PACKET_CLASS_RECEIVE);
 297         if (tp && (tp->length + RX_HEADER_SIZE) < asize) {
 298             if (0 <
 299                 rxi_AllocDataBuf(tp, asize - (tp->length + RX_HEADER_SIZE),
 300                                  RX_PACKET_CLASS_RECV_CBUF)) {
 301                 rxi_FreePacket(tp);
 302                 tp = NULL;
 303                 if (rx_stats_active) {
 304                     rx_atomic_inc(&rx_stats.noPacketBuffersOnRead);
 305                 }
 306             }
 307         }
 308     } else {
 309         /*
 310          * XXX if packet is too long for our buffer,
 311          * should do this at a higher layer and let other
 312          * end know we're losing.
 313          */
 314         if (rx_stats_active) {
 315             rx_atomic_inc(&rx_stats.bogusPacketOnRead);
 316         }
 317         /* I DON"T LIKE THIS PRINTF -- PRINTFS MAKE THINGS VERY VERY SLOOWWW */
 318         dpf(("rx: packet dropped: bad ulen=%d\n", asize));
 319         tp = NULL;
 320     }
 321
 322     if (!tp)
 323         return -1;
 324     /* otherwise we have a packet, set appropriate values */
 325     *ahandle = tp;
 326     return 0;
 327 }
 328
 329 static int
 330 MyArrivalProc(struct rx_packet *ahandle,
 331               struct sockaddr_in *afrom,
 332               struct socket *arock,
 333               afs_int32 asize)
 334 {
 335     /* handle basic rx packet */
 336     ahandle->length = asize - RX_HEADER_SIZE;
 337     rxi_DecodePacketHeader(ahandle);
 338     ahandle =
 339         rxi_ReceivePacket(ahandle, arock,
 340                           afrom->sin_addr.s_addr, afrom->sin_port, NULL,
 341                           NULL);
 342
 343     /* free the packet if it has been returned */
 344     if (ahandle)
 345         rxi_FreePacket(ahandle);
 346     return 0;
 347 }
 348 #endif /* !RXK_LISTENER_ENV */
 349
 350 void
 351 rxi_StartListener(void)
 352 {
 353 #if !defined(RXK_LISTENER_ENV) && !defined(RXK_UPCALL_ENV)
 354     /* if kernel, give name of appropriate procedures */
 355     rxk_GetPacketProc = MyPacketProc;
 356     rxk_PacketArrivalProc = MyArrivalProc;
 357     rxk_init();
 358 #endif
 359 }
 360
 361 /* Called from rxi_FindPeer, when initializing a clear rx_peer structure,
 362   to get interesting information. */
 363 void
 364 rxi_InitPeerParams(struct rx_peer *pp)
 365 {
 366     u_short rxmtu;
 367
 368 #ifndef AFS_SUN5_ENV
 369 # ifdef AFS_USERSPACE_IP_ADDR
 370     afs_int32 i;
 371     afs_int32 mtu;
 372
 373     i = rxi_Findcbi(pp->host);
 374     if (i == -1) {
 375         rx_rto_setPeerTimeoutSecs(pp, 3);
 376         pp->ifMTU = MIN(RX_REMOTE_PACKET_SIZE, rx_MyMaxSendSize);
 377     } else {
 378         rx_rto_setPeerTimeoutSecs(pp, 2);
 379         pp->ifMTU = MIN(RX_MAX_PACKET_SIZE, rx_MyMaxSendSize);
 380         mtu = ntohl(afs_cb_interface.mtu[i]);
 381         /* Diminish the packet size to one based on the MTU given by
 382          * the interface. */
 383         if (mtu > (RX_IPUDP_SIZE + RX_HEADER_SIZE)) {
 384             rxmtu = mtu - RX_IPUDP_SIZE;
 385             if (rxmtu < pp->ifMTU)
 386                 pp->ifMTU = rxmtu;
 387         }
 388     }
 389 # else /* AFS_USERSPACE_IP_ADDR */
 390     rx_ifnet_t ifn;
 391
 392 #  if !defined(AFS_SGI62_ENV)
 393     if (numMyNetAddrs == 0)
 394         (void)rxi_GetIFInfo();
 395 #  endif
 396
 397     ifn = rxi_FindIfnet(pp->host, NULL);
 398     if (ifn) {
 399         rx_rto_setPeerTimeoutSecs(pp, 2);
 400         pp->ifMTU = MIN(RX_MAX_PACKET_SIZE, rx_MyMaxSendSize);
 401 #  ifdef IFF_POINTOPOINT
 402         if (rx_ifnet_flags(ifn) & IFF_POINTOPOINT) {
 403             /* wish we knew the bit rate and the chunk size, sigh. */
 404             rx_rto_setPeerTimeoutSecs(pp, 4);
 405             pp->ifMTU = RX_PP_PACKET_SIZE;
 406         }
 407 #  endif /* IFF_POINTOPOINT */
 408         /* Diminish the packet size to one based on the MTU given by
 409          * the interface. */
 410         if (rx_ifnet_mtu(ifn) > (RX_IPUDP_SIZE + RX_HEADER_SIZE)) {
 411             rxmtu = rx_ifnet_mtu(ifn) - RX_IPUDP_SIZE;
 412             if (rxmtu < pp->ifMTU)
 413                 pp->ifMTU = rxmtu;
 414         }
 415     } else {                    /* couldn't find the interface, so assume the worst */
 416         rx_rto_setPeerTimeoutSecs(pp, 3);
 417         pp->ifMTU = MIN(RX_REMOTE_PACKET_SIZE, rx_MyMaxSendSize);
 418     }
 419 # endif /* else AFS_USERSPACE_IP_ADDR */
 420 #else /* AFS_SUN5_ENV */
 421     afs_int32 mtu;
 422
 423     mtu = rxi_FindIfMTU(pp->host);
 424
 425     if (mtu <= 0) {
 426         rx_rto_setPeerTimeoutSecs(pp, 3);
 427         pp->ifMTU = MIN(RX_REMOTE_PACKET_SIZE, rx_MyMaxSendSize);
 428     } else {
 429         rx_rto_setPeerTimeoutSecs(pp, 2);
 430         pp->ifMTU = MIN(RX_MAX_PACKET_SIZE, rx_MyMaxSendSize);
 431
 432         /* Diminish the packet size to one based on the MTU given by
 433          * the interface. */
 434         if (mtu > (RX_IPUDP_SIZE + RX_HEADER_SIZE)) {
 435             rxmtu = mtu - RX_IPUDP_SIZE;
 436             if (rxmtu < pp->ifMTU)
 437                 pp->ifMTU = rxmtu;
 438         }
 439     }
 440 #endif /* AFS_SUN5_ENV */
 441     pp->ifMTU = rxi_AdjustIfMTU(pp->ifMTU);
 442     pp->maxMTU = OLD_MAX_PACKET_SIZE;   /* for compatibility with old guys */
 443     pp->natMTU = MIN(pp->ifMTU, OLD_MAX_PACKET_SIZE);
 444     pp->ifDgramPackets =
 445         MIN(rxi_nDgramPackets,
 446             rxi_AdjustDgramPackets(rxi_nSendFrags, pp->ifMTU));
 447     pp->maxDgramPackets = 1;
 448
 449     /* Initialize slow start parameters */
 450     pp->MTU = MIN(pp->natMTU, pp->maxMTU);
 451     pp->cwind = 1;
 452     pp->nDgramPackets = 1;
 453     pp->congestSeq = 0;
 454 }
 455
 456
 457 /* The following code is common to several system types, but not all. The
 458  * separate ones are found in the system specific subdirectories.
 459  */
 460
 461
 462 #if ! defined(AFS_AIX_ENV) && ! defined(AFS_SUN5_ENV) && ! defined(UKERNEL) && ! defined(AFS_LINUX20_ENV) && !defined (AFS_DARWIN_ENV) && !defined (AFS_XBSD_ENV)
 463 /* Routine called during the afsd "-shutdown" process to put things back to
 464  * the initial state.
 465  */
 466 static struct protosw parent_proto;     /* udp proto switch */
 467
 468 void
 469 shutdown_rxkernel(void)
 470 {
 471     struct protosw *tpro, *last;
 472     last = inetdomain.dom_protoswNPROTOSW;
 473     for (tpro = inetdomain.dom_protosw; tpro < last; tpro++)
 474         if (tpro->pr_protocol == IPPROTO_UDP) {
 475             /* restore original udp protocol switch */
 476             memcpy((void *)tpro, (void *)&parent_proto, sizeof(parent_proto));
 477             memset((void *)&parent_proto, 0, sizeof(parent_proto));
 478             rxk_initDone = 0;
 479             rxk_shutdownPorts();
 480             return;
 481         }
 482     dpf(("shutdown_rxkernel: no udp proto\n"));
 483 }
 484 #endif /* !AIX && !SUN && !NCR  && !UKERNEL */
 485
 486 #if !defined(AFS_SUN5_ENV) && !defined(AFS_SGI62_ENV)
 487 /* Determine what the network interfaces are for this machine. */
 488
 489 #ifdef AFS_USERSPACE_IP_ADDR
 490 int
 491 rxi_GetcbiInfo(void)
 492 {
 493     int i, j, different = 0, num = ADDRSPERSITE;
 494     int rxmtu, maxmtu;
 495     afs_uint32 ifinaddr;
 496     afs_uint32 addrs[ADDRSPERSITE];
 497     int mtus[ADDRSPERSITE];
 498
 499     memset((void *)addrs, 0, sizeof(addrs));
 500     memset((void *)mtus, 0, sizeof(mtus));
 501
 502     if (afs_cb_interface.numberOfInterfaces < num)
 503         num = afs_cb_interface.numberOfInterfaces;
 504     for (i = 0; i < num; i++) {
 505         if (!afs_cb_interface.mtu[i])
 506             afs_cb_interface.mtu[i] = htonl(1500);
 507         rxmtu = (ntohl(afs_cb_interface.mtu[i]) - RX_IPUDP_SIZE);
 508         ifinaddr = ntohl(afs_cb_interface.addr_in[i]);
 509         if (myNetAddrs[i] != ifinaddr)
 510             different++;
 511
 512         mtus[i] = rxmtu;
 513         rxmtu = rxi_AdjustIfMTU(rxmtu);
 514         maxmtu =
 515             rxmtu * rxi_nRecvFrags + ((rxi_nRecvFrags - 1) * UDP_HDR_SIZE);
 516         maxmtu = rxi_AdjustMaxMTU(rxmtu, maxmtu);
 517         addrs[i++] = ifinaddr;
 518         if (!rx_IsLoopbackAddr(ifinaddr) && (maxmtu > rx_maxReceiveSize)) {
 519             rx_maxReceiveSize = MIN(RX_MAX_PACKET_SIZE, maxmtu);
 520             rx_maxReceiveSize = MIN(rx_maxReceiveSize, rx_maxReceiveSizeUser);
 521         }
 522     }
 523
 524     rx_maxJumboRecvSize =
 525         RX_HEADER_SIZE + (rxi_nDgramPackets * RX_JUMBOBUFFERSIZE) +
 526         ((rxi_nDgramPackets - 1) * RX_JUMBOHEADERSIZE);
 527     rx_maxJumboRecvSize = MAX(rx_maxJumboRecvSize, rx_maxReceiveSize);
 528
 529     if (different) {
 530         for (j = 0; j < i; j++) {
 531             myNetMTUs[j] = mtus[j];
 532             myNetAddrs[j] = addrs[j];
 533         }
 534     }
 535     return different;
 536 }
 537
 538
 539 /* Returns the afs_cb_interface inxex which best matches address.
 540  * If none is found, we return -1.
 541  */
 542 afs_int32
 543 rxi_Findcbi(afs_uint32 addr)
 544 {
 545     int j;
 546     afs_uint32 myAddr, thisAddr, netMask, subnetMask;
 547     afs_int32 rvalue = -1;
 548     int match_value = 0;
 549
 550     if (numMyNetAddrs == 0)
 551         (void)rxi_GetcbiInfo();
 552
 553     myAddr = ntohl(addr);
 554
 555     if (IN_CLASSA(myAddr))
 556         netMask = IN_CLASSA_NET;
 557     else if (IN_CLASSB(myAddr))
 558         netMask = IN_CLASSB_NET;
 559     else if (IN_CLASSC(myAddr))
 560         netMask = IN_CLASSC_NET;
 561     else
 562         netMask = 0;
 563
 564     for (j = 0; j < afs_cb_interface.numberOfInterfaces; j++) {
 565         thisAddr = ntohl(afs_cb_interface.addr_in[j]);
 566         subnetMask = ntohl(afs_cb_interface.subnetmask[j]);
 567         if ((myAddr & netMask) == (thisAddr & netMask)) {
 568             if ((myAddr & subnetMask) == (thisAddr & subnetMask)) {
 569                 if (myAddr == thisAddr) {
 570                     match_value = 4;
 571                     rvalue = j;
 572                     break;
 573                 }
 574                 if (match_value < 3) {
 575                     match_value = 3;
 576                     rvalue = j;
 577                 }
 578             } else {
 579                 if (match_value < 2) {
 580                     match_value = 2;
 581                     rvalue = j;
 582                 }
 583             }
 584         }
 585     }
 586
 587     return (rvalue);
 588 }
 589
 590 #else /* AFS_USERSPACE_IP_ADDR */
 591
 592 #if !defined(AFS_AIX41_ENV) && !defined(AFS_DUX40_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
 593 #define IFADDR2SA(f) (&((f)->ifa_addr))
 594 #else /* AFS_AIX41_ENV */
 595 #define IFADDR2SA(f) ((f)->ifa_addr)
 596 #endif
 597
 598 int
 599 rxi_GetIFInfo(void)
 600 {
 601     int i = 0;
 602     int different = 0;
 603
 604     int rxmtu, maxmtu;
 605     afs_uint32 addrs[ADDRSPERSITE];
 606     int mtus[ADDRSPERSITE];
 607     afs_uint32 ifinaddr;
 608 #if defined(AFS_DARWIN80_ENV)
 609     errno_t t;
 610     unsigned int count;
 611     int cnt=0, m, j;
 612     rx_ifaddr_t *ifads;
 613     rx_ifnet_t *ifns;
 614     struct sockaddr sout;
 615     struct sockaddr_in *sin;
 616     struct in_addr pin;
 617 #else
 618     rx_ifaddr_t ifad;   /* ifnet points to a if_addrlist of ifaddrs */
 619     rx_ifnet_t ifn;
 620 #endif
 621
 622     memset(addrs, 0, sizeof(addrs));
 623     memset(mtus, 0, sizeof(mtus));
 624
 625 #if defined(AFS_DARWIN80_ENV)
 626     if (!ifnet_list_get(AF_INET, &ifns, &count)) {
 627         for (m = 0; m < count; m++) {
 628             if (!ifnet_get_address_list(ifns[m], &ifads)) {
 629                 for (j = 0; ifads[j] != NULL && cnt < ADDRSPERSITE; j++) {
 630                     if ((t = ifaddr_address(ifads[j], &sout, sizeof(struct sockaddr))) == 0) {
 631                         sin = (struct sockaddr_in *)&sout;
 632                         rxmtu = rx_ifnet_mtu(rx_ifaddr_ifnet(ifads[j])) - RX_IPUDP_SIZE;
 633                         ifinaddr = ntohl(sin->sin_addr.s_addr);
 634                         if (myNetAddrs[i] != ifinaddr) {
 635                             different++;
 636                         }
 637                         mtus[i] = rxmtu;
 638                         rxmtu = rxi_AdjustIfMTU(rxmtu);
 639                         maxmtu =
 640                             rxmtu * rxi_nRecvFrags +
 641                             ((rxi_nRecvFrags - 1) * UDP_HDR_SIZE);
 642                         maxmtu = rxi_AdjustMaxMTU(rxmtu, maxmtu);
 643                         addrs[i++] = ifinaddr;
 644                         if (!rx_IsLoopbackAddr(ifinaddr) &&
 645                             (maxmtu > rx_maxReceiveSize)) {
 646                             rx_maxReceiveSize =
 647                                 MIN(RX_MAX_PACKET_SIZE, maxmtu);
 648                             rx_maxReceiveSize =
 649                                 MIN(rx_maxReceiveSize, rx_maxReceiveSizeUser);
 650                         }
 651                         cnt++;
 652                     }
 653                 }
 654                 ifnet_free_address_list(ifads);
 655             }
 656         }
 657         ifnet_list_free(ifns);
 658     }
 659 #else
 660 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
 661 #if defined(AFS_FBSD80_ENV)
 662     TAILQ_FOREACH(ifn, &V_ifnet, if_link) {
 663 #else
 664     TAILQ_FOREACH(ifn, &ifnet, if_link) {
 665 #endif
 666         if (i >= ADDRSPERSITE)
 667             break;
 668 #elif defined(AFS_OBSD_ENV) || defined(AFS_NBSD_ENV)
 669     for (ifn = ifnet.tqh_first; i < ADDRSPERSITE && ifn != NULL;
 670          ifn = ifn->if_list.tqe_next) {
 671 #else
 672     for (ifn = ifnet; ifn != NULL && i < ADDRSPERSITE; ifn = ifn->if_next) {
 673 #endif
 674         rxmtu = (ifn->if_mtu - RX_IPUDP_SIZE);
 675 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
 676         TAILQ_FOREACH(ifad, &ifn->if_addrhead, ifa_link) {
 677             if (i >= ADDRSPERSITE)
 678                 break;
 679 #elif defined(AFS_OBSD_ENV) || defined(AFS_NBSD_ENV)
 680         for (ifad = ifn->if_addrlist.tqh_first;
 681              ifad != NULL && i < ADDRSPERSITE;
 682              ifad = ifad->ifa_list.tqe_next) {
 683 #else
 684         for (ifad = ifn->if_addrlist; ifad != NULL && i < ADDRSPERSITE;
 685              ifad = ifad->ifa_next) {
 686 #endif
 687             if (IFADDR2SA(ifad)->sa_family == AF_INET) {
 688                 ifinaddr =
 689                     ntohl(((struct sockaddr_in *)IFADDR2SA(ifad))->sin_addr.
 690                           s_addr);
 691                 if (myNetAddrs[i] != ifinaddr) {
 692                     different++;
 693                 }
 694                 mtus[i] = rxmtu;
 695                 rxmtu = rxi_AdjustIfMTU(rxmtu);
 696                 maxmtu =
 697                     rxmtu * rxi_nRecvFrags +
 698                     ((rxi_nRecvFrags - 1) * UDP_HDR_SIZE);
 699                 maxmtu = rxi_AdjustMaxMTU(rxmtu, maxmtu);
 700                 addrs[i++] = ifinaddr;
 701                 if (!rx_IsLoopbackAddr(ifinaddr) && (maxmtu > rx_maxReceiveSize)) {
 702                     rx_maxReceiveSize = MIN(RX_MAX_PACKET_SIZE, maxmtu);
 703                     rx_maxReceiveSize =
 704                         MIN(rx_maxReceiveSize, rx_maxReceiveSizeUser);
 705                 }
 706             }
 707         }
 708     }
 709 #endif
 710
 711     rx_maxJumboRecvSize =
 712         RX_HEADER_SIZE + rxi_nDgramPackets * RX_JUMBOBUFFERSIZE +
 713         (rxi_nDgramPackets - 1) * RX_JUMBOHEADERSIZE;
 714     rx_maxJumboRecvSize = MAX(rx_maxJumboRecvSize, rx_maxReceiveSize);
 715
 716     if (different) {
 717         int l;
 718         for (l = 0; l < i; l++) {
 719             myNetMTUs[l] = mtus[l];
 720             myNetAddrs[l] = addrs[l];
 721         }
 722     }
 723     return different;
 724 }
 725
 726 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
 727 /* Returns ifnet which best matches address */
 728 rx_ifnet_t
 729 rxi_FindIfnet(afs_uint32 addr, afs_uint32 * maskp)
 730 {
 731     struct sockaddr_in s, sr;
 732     rx_ifaddr_t ifad;
 733
 734     s.sin_family = AF_INET;
 735     s.sin_addr.s_addr = addr;
 736     ifad = rx_ifaddr_withnet((struct sockaddr *)&s);
 737
 738     if (ifad && maskp) {
 739         rx_ifaddr_netmask(ifad, (struct sockaddr *)&sr, sizeof(sr));
 740         *maskp = sr.sin_addr.s_addr;
 741     }
 742     return (ifad ? rx_ifaddr_ifnet(ifad) : NULL);
 743 }
 744
 745 #else /* DARWIN || XBSD */
 746
 747 /* Returns ifnet which best matches address */
 748 rx_ifnet_t
 749 rxi_FindIfnet(afs_uint32 addr, afs_uint32 * maskp)
 750 {
 751     int match_value = 0;
 752     extern struct in_ifaddr *in_ifaddr;
 753     struct in_ifaddr *ifa, *ifad = NULL;
 754
 755     addr = ntohl(addr);
 756
 757     for (ifa = in_ifaddr; ifa; ifa = ifa->ia_next) {
 758         if ((addr & ifa->ia_netmask) == ifa->ia_net) {
 759             if ((addr & ifa->ia_subnetmask) == ifa->ia_subnet) {
 760                 if (IA_SIN(ifa)->sin_addr.s_addr == addr) {     /* ie, ME!!!  */
 761                     match_value = 4;
 762                     ifad = ifa;
 763                     goto done;
 764                 }
 765                 if (match_value < 3) {
 766                     ifad = ifa;
 767                     match_value = 3;
 768                 }
 769             } else {
 770                 if (match_value < 2) {
 771                     ifad = ifa;
 772                     match_value = 2;
 773                 }
 774             }
 775         }                       /* if net matches */
 776     }                           /* for all in_ifaddrs */
 777
 778   done:
 779     if (ifad && maskp)
 780         *maskp = ifad->ia_subnetmask;
 781     return (ifad ? ifad->ia_ifp : NULL);
 782 }
 783 #endif /* else DARWIN || XBSD */
 784 #endif /* else AFS_USERSPACE_IP_ADDR */
 785 #endif /* !SUN5 && !SGI62 */
 786
 787
 788 /* rxk_NewSocket, rxk_FreeSocket and osi_NetSend are from the now defunct
 789  * afs_osinet.c. One could argue that rxi_NewSocket could go into the
 790  * system specific subdirectories for all systems. But for the moment,
 791  * most of it is simple to follow common code.
 792  */
 793 #if !defined(UKERNEL)
 794 #if !defined(AFS_SUN5_ENV) && !defined(AFS_LINUX20_ENV)
 795 /* rxk_NewSocket creates a new socket on the specified port. The port is
 796  * in network byte order.
 797  */
 798 osi_socket *
 799 rxk_NewSocketHost(afs_uint32 ahost, short aport)
 800 {
 801     afs_int32 code;
 802 #ifdef AFS_DARWIN80_ENV
 803     socket_t newSocket;
 804 #else
 805     struct socket *newSocket;
 806 #endif
 807 #if (!defined(AFS_HPUX1122_ENV) && !defined(AFS_FBSD_ENV))
 808     struct mbuf *nam;
 809 #endif
 810     struct sockaddr_in myaddr;
 811 #ifdef AFS_HPUX110_ENV
 812     /* prototype copied from kernel source file streams/str_proto.h */
 813     extern MBLKP allocb_wait(int, int);
 814     MBLKP bindnam;
 815     int addrsize = sizeof(struct sockaddr_in);
 816     struct file *fp;
 817     extern struct fileops socketops;
 818 #endif
 819 #ifdef AFS_SGI65_ENV
 820     bhv_desc_t bhv;
 821 #endif
 822
 823     AFS_STATCNT(osi_NewSocket);
 824 #if (defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)) && defined(KERNEL_FUNNEL)
 825     thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
 826 #endif
 827     AFS_ASSERT_GLOCK();
 828     AFS_GUNLOCK();
 829 #if     defined(AFS_HPUX102_ENV)
 830 #if     defined(AFS_HPUX110_ENV)
 831     /* we need a file associated with the socket so sosend in NetSend
 832      * will not fail */
 833     /* blocking socket */
 834     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, 0, 0);
 835     fp = falloc();
 836     if (!fp)
 837         goto bad;
 838     fp->f_flag = FREAD | FWRITE;
 839     fp->f_type = DTYPE_SOCKET;
 840     fp->f_ops = &socketops;
 841
 842     fp->f_data = (void *)newSocket;
 843     newSocket->so_fp = (void *)fp;
 844
 845 #else /* AFS_HPUX110_ENV */
 846     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, 0, SS_NOWAIT);
 847 #endif /* else AFS_HPUX110_ENV */
 848 #elif defined(AFS_SGI65_ENV) || defined(AFS_OBSD_ENV)
 849     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, IPPROTO_UDP);
 850 #elif defined(AFS_FBSD_ENV)
 851     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, IPPROTO_UDP,
 852                     afs_osi_credp, curthread);
 853 #elif defined(AFS_DARWIN80_ENV)
 854 #ifdef RXK_LISTENER_ENV
 855     code = sock_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, NULL, &newSocket);
 856 #else
 857     code = sock_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, rx_upcall, NULL, &newSocket);
 858 #endif
 859 #elif defined(AFS_NBSD50_ENV)
 860     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, 0, osi_curproc(), NULL);
 861 #elif defined(AFS_NBSD40_ENV)
 862     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, 0, osi_curproc());
 863 #else
 864     code = socreate(AF_INET, &newSocket, SOCK_DGRAM, 0);
 865 #endif /* AFS_HPUX102_ENV */
 866     if (code)
 867         goto bad;
 868
 869     memset(&myaddr, 0, sizeof myaddr);
 870     myaddr.sin_family = AF_INET;
 871     myaddr.sin_port = aport;
 872     myaddr.sin_addr.s_addr = ahost;
 873 #ifdef STRUCT_SOCKADDR_HAS_SA_LEN
 874     myaddr.sin_len = sizeof(myaddr);
 875 #endif
 876
 877 #ifdef AFS_HPUX110_ENV
 878     bindnam = allocb_wait((addrsize + SO_MSGOFFSET + 1), BPRI_MED);
 879     if (!bindnam) {
 880         setuerror(ENOBUFS);
 881         goto bad;
 882     }
 883     memcpy((caddr_t) bindnam->b_rptr + SO_MSGOFFSET, (caddr_t) & myaddr,
 884            addrsize);
 885     bindnam->b_wptr = bindnam->b_rptr + (addrsize + SO_MSGOFFSET + 1);
 886     code = sobind(newSocket, bindnam, addrsize);
 887     if (code) {
 888         soclose(newSocket);
 889 #if !defined(AFS_HPUX1122_ENV)
 890         m_freem(nam);
 891 #endif
 892         goto bad;
 893     }
 894
 895     freeb(bindnam);
 896 #else /* AFS_HPUX110_ENV */
 897 #if defined(AFS_DARWIN80_ENV)
 898     {
 899        int buflen = 50000;
 900        int i,code2;
 901        for (i=0;i<2;i++) {
 902            code = sock_setsockopt(newSocket, SOL_SOCKET, SO_SNDBUF,
 903                                   &buflen, sizeof(buflen));
 904            code2 = sock_setsockopt(newSocket, SOL_SOCKET, SO_RCVBUF,
 905                                   &buflen, sizeof(buflen));
 906            if (!code && !code2)
 907                break;
 908            if (i == 2)
 909               osi_Panic("osi_NewSocket: last attempt to reserve 32K failed!\n");
 910            buflen = 32766;
 911        }
 912     }
 913 #else
 914 #if defined(AFS_NBSD_ENV)
 915     solock(newSocket);
 916 #endif
 917     code = soreserve(newSocket, 50000, 50000);
 918     if (code) {
 919         code = soreserve(newSocket, 32766, 32766);
 920         if (code)
 921             osi_Panic("osi_NewSocket: last attempt to reserve 32K failed!\n");
 922     }
 923 #if defined(AFS_NBSD_ENV)
 924     sounlock(newSocket);
 925 #endif
 926 #endif
 927 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
 928 #if defined(AFS_FBSD_ENV)
 929     code = sobind(newSocket, (struct sockaddr *)&myaddr, curthread);
 930 #else
 931     code = sobind(newSocket, (struct sockaddr *)&myaddr);
 932 #endif
 933     if (code) {
 934         dpf(("sobind fails (%d)\n", (int)code));
 935         soclose(newSocket);
 936         goto bad;
 937     }
 938 #else /* defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV) */
 939 #ifdef  AFS_OSF_ENV
 940     nam = m_getclr(M_WAIT, MT_SONAME);
 941 #else /* AFS_OSF_ENV */
 942     nam = m_get(M_WAIT, MT_SONAME);
 943 #endif
 944     if (nam == NULL) {
 945 #if defined(KERNEL_HAVE_UERROR)
 946         setuerror(ENOBUFS);
 947 #endif
 948         goto bad;
 949     }
 950     nam->m_len = sizeof(myaddr);
 951     memcpy(mtod(nam, caddr_t), &myaddr, sizeof(myaddr));
 952 #if defined(AFS_SGI65_ENV)
 953     BHV_PDATA(&bhv) = (void *)newSocket;
 954     code = sobind(&bhv, nam);
 955     m_freem(nam);
 956 #elif defined(AFS_OBSD44_ENV) || defined(AFS_NBSD40_ENV)
 957     code = sobind(newSocket, nam, osi_curproc());
 958 #else
 959     code = sobind(newSocket, nam);
 960 #endif
 961     if (code) {
 962         dpf(("sobind fails (%d)\n", (int)code));
 963         soclose(newSocket);
 964 #ifndef AFS_SGI65_ENV
 965         m_freem(nam);
 966 #endif
 967         goto bad;
 968     }
 969 #endif /* else AFS_DARWIN_ENV */
 970 #endif /* else AFS_HPUX110_ENV */
 971
 972     AFS_GLOCK();
 973 #if defined(AFS_DARWIN_ENV) && defined(KERNEL_FUNNEL)
 974     thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
 975 #endif
 976     return (osi_socket *)newSocket;
 977
 978   bad:
 979     AFS_GLOCK();
 980 #if defined(AFS_DARWIN_ENV) && defined(KERNEL_FUNNEL)
 981     thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
 982 #endif
 983     return (osi_socket *)0;
 984 }
 985
 986 osi_socket *
 987 rxk_NewSocket(short aport)
 988 {
 989     return rxk_NewSocketHost(0, aport);
 990 }
 991
 992 /* free socket allocated by rxk_NewSocket */
 993 int
 994 rxk_FreeSocket(struct socket *asocket)
 995 {
 996     AFS_STATCNT(osi_FreeSocket);
 997 #if defined(AFS_DARWIN_ENV) && defined(KERNEL_FUNNEL)
 998     thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
 999 #endif
1000 #ifdef AFS_HPUX110_ENV
1001     if (asocket->so_fp) {
1002         struct file *fp = asocket->so_fp;
1003 #if !defined(AFS_HPUX1123_ENV)
1004         /* 11.23 still has falloc, but not FPENTRYFREE !
1005          * so for now if we shutdown, we will waist a file
1006          * structure */
1007         FPENTRYFREE(fp);
1008         asocket->so_fp = NULL;
1009 #endif
1010     }
1011 #endif /* AFS_HPUX110_ENV */
1012     soclose(asocket);
1013 #if defined(AFS_DARWIN_ENV) && defined(KERNEL_FUNNEL)
1014     thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
1015 #endif
1016     return 0;
1017 }
1018 #endif /* !SUN5 && !LINUX20 */
1019
1020 #if defined(RXK_LISTENER_ENV) || defined(AFS_SUN5_ENV) || defined(RXK_UPCALL_ENV)
1021 #ifdef RXK_TIMEDSLEEP_ENV
1022 /* Shutting down should wake us up, as should an earlier event. */
1023 void
1024 rxi_ReScheduleEvents(void)
1025 {
1026     /* needed to allow startup */
1027     int glock = ISAFS_GLOCK();
1028     if (!glock)
1029         AFS_GLOCK();
1030     osi_rxWakeup(&afs_termState);
1031     if (!glock)
1032         AFS_GUNLOCK();
1033 }
1034 #endif
1035 /*
1036  * Run RX event daemon every second (5 times faster than rest of systems)
1037  */
1038 void
1039 afs_rxevent_daemon(void)
1040 {
1041     struct clock temp;
1042     SPLVAR;
1043
1044     while (1) {
1045 #ifdef RX_ENABLE_LOCKS
1046         AFS_GUNLOCK();
1047 #endif /* RX_ENABLE_LOCKS */
1048         NETPRI;
1049         rxevent_RaiseEvents(&temp);
1050         USERPRI;
1051 #ifdef RX_ENABLE_LOCKS
1052         AFS_GLOCK();
1053 #endif /* RX_ENABLE_LOCKS */
1054 #ifdef RX_KERNEL_TRACE
1055         afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1056                    "before afs_osi_Wait()");
1057 #endif
1058 #ifdef RXK_TIMEDSLEEP_ENV
1059         afs_osi_TimedSleep(&afs_termState, MAX(500, ((temp.sec * 1000) +
1060                                                      (temp.usec / 1000))), 0);
1061 #else
1062         afs_osi_Wait(500, NULL, 0);
1063 #endif
1064 #ifdef RX_KERNEL_TRACE
1065         afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1066                    "after afs_osi_Wait()");
1067 #endif
1068         if (afs_termState == AFSOP_STOP_RXEVENT) {
1069 #ifdef RXK_LISTENER_ENV
1070             afs_termState = AFSOP_STOP_RXK_LISTENER;
1071 #elif defined(AFS_SUN510_ENV) || defined(RXK_UPCALL_ENV)
1072             afs_termState = AFSOP_STOP_NETIF;
1073 #else
1074             afs_termState = AFSOP_STOP_COMPLETE;
1075 #endif
1076             osi_rxWakeup(&afs_termState);
1077             return;
1078         }
1079     }
1080 }
1081 #endif
1082
1083 #ifdef RXK_LISTENER_ENV
1084
1085 /* rxk_ReadPacket returns 1 if valid packet, 0 on error. */
1086 int
1087 rxk_ReadPacket(osi_socket so, struct rx_packet *p, int *host, int *port)
1088 {
1089     int code;
1090     struct sockaddr_in from;
1091     int nbytes;
1092     afs_int32 rlen;
1093     afs_int32 tlen;
1094     afs_int32 savelen;          /* was using rlen but had aliasing problems */
1095     rx_computelen(p, tlen);
1096     rx_SetDataSize(p, tlen);    /* this is the size of the user data area */
1097
1098     tlen += RX_HEADER_SIZE;     /* now this is the size of the entire packet */
1099     rlen = rx_maxJumboRecvSize; /* this is what I am advertising.  Only check
1100                                  * it once in order to avoid races.  */
1101     tlen = rlen - tlen;
1102     if (tlen > 0) {
1103         tlen = rxi_AllocDataBuf(p, tlen, RX_PACKET_CLASS_RECV_CBUF);
1104         if (tlen > 0) {
1105             tlen = rlen - tlen;
1106         } else
1107             tlen = rlen;
1108     } else
1109         tlen = rlen;
1110
1111     /* add some padding to the last iovec, it's just to make sure that the
1112      * read doesn't return more data than we expect, and is done to get around
1113      * our problems caused by the lack of a length field in the rx header. */
1114     savelen = p->wirevec[p->niovecs - 1].iov_len;
1115     p->wirevec[p->niovecs - 1].iov_len = savelen + RX_EXTRABUFFERSIZE;
1116
1117     nbytes = tlen + sizeof(afs_int32);
1118 #ifdef RX_KERNEL_TRACE
1119     if (ICL_SETACTIVE(afs_iclSetp)) {
1120         AFS_GLOCK();
1121         afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1122                    "before osi_NetRecive()");
1123         AFS_GUNLOCK();
1124     }
1125 #endif
1126     code = osi_NetReceive(rx_socket, &from, p->wirevec, p->niovecs, &nbytes);
1127
1128 #ifdef RX_KERNEL_TRACE
1129     if (ICL_SETACTIVE(afs_iclSetp)) {
1130         AFS_GLOCK();
1131         afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
1132                    "after osi_NetRecive()");
1133         AFS_GUNLOCK();
1134     }
1135 #endif
1136     /* restore the vec to its correct state */
1137     p->wirevec[p->niovecs - 1].iov_len = savelen;
1138
1139     if (!code) {
1140         p->length = nbytes - RX_HEADER_SIZE;;
1141         if ((nbytes > tlen) || (p->length & 0x8000)) {  /* Bogus packet */
1142             if (nbytes <= 0) {
1143                 if (rx_stats_active) {
1144                     MUTEX_ENTER(&rx_stats_mutex);
1145                     rx_atomic_inc(&rx_stats.bogusPacketOnRead);
1146                     rx_stats.bogusHost = from.sin_addr.s_addr;
1147                     MUTEX_EXIT(&rx_stats_mutex);
1148                 }
1149                 dpf(("B: bogus packet from [%x,%d] nb=%d\n",
1150                      from.sin_addr.s_addr, from.sin_port, nbytes));
1151             }
1152             return -1;
1153         } else {
1154             /* Extract packet header. */
1155             rxi_DecodePacketHeader(p);
1156
1157             *host = from.sin_addr.s_addr;
1158             *port = from.sin_port;
1159             if (p->header.type > 0 && p->header.type < RX_N_PACKET_TYPES) {
1160                 if (rx_stats_active) {
1161                     rx_atomic_inc(&rx_stats.packetsRead[p->header.type - 1]);
1162                 }
1163             }
1164
1165 #ifdef RX_TRIMDATABUFS
1166             /* Free any empty packet buffers at the end of this packet */
1167             rxi_TrimDataBufs(p, 1);
1168 #endif
1169             return 0;
1170         }
1171     } else
1172         return code;
1173 }
1174
1175 /* rxk_Listener()
1176  *
1177  * Listen for packets on socket. This thread is typically started after
1178  * rx_Init has called rxi_StartListener(), but nevertheless, ensures that
1179  * the start state is set before proceeding.
1180  *
1181  * Note that this thread is outside the AFS global lock for much of
1182  * it's existence.
1183  *
1184  * In many OS's, the socket receive code sleeps interruptibly. That's not what
1185  * we want here. So we need to either block all signals (including SIGKILL
1186  * and SIGSTOP) or reset the thread's signal state to unsignalled when the
1187  * OS's socket receive routine returns as a result of a signal.
1188  */
1189 int rxk_ListenerPid;            /* Used to signal process to wakeup at shutdown */
1190 #ifdef AFS_LINUX20_ENV
1191 struct task_struct *rxk_ListenerTask;
1192 #endif
1193
1194 void
1195 rxk_Listener(void)
1196 {
1197     struct rx_packet *rxp = NULL;
1198     int code;
1199     int host, port;
1200
1201 #ifdef AFS_LINUX20_ENV
1202     rxk_ListenerPid = current->pid;
1203     rxk_ListenerTask = current;
1204     allow_signal(SIGKILL);    /* Allowed, but blocked until shutdown */
1205 #endif
1206 #ifdef AFS_SUN5_ENV
1207     rxk_ListenerPid = 1;        /* No PID, just a flag that we're alive */
1208 #endif /* AFS_SUN5_ENV */
1209 #ifdef AFS_XBSD_ENV
1210     rxk_ListenerPid = curproc->p_pid;
1211 #endif /* AFS_FBSD_ENV */
1212 #ifdef AFS_DARWIN80_ENV
1213     rxk_ListenerPid = proc_selfpid();
1214 #elif defined(AFS_DARWIN_ENV)
1215     rxk_ListenerPid = current_proc()->p_pid;
1216 #endif
1217 #ifdef RX_ENABLE_LOCKS
1218     AFS_GUNLOCK();
1219 #endif /* RX_ENABLE_LOCKS */
1220     while (afs_termState != AFSOP_STOP_RXK_LISTENER) {
1221         /* See if a check for additional packets was issued */
1222         rx_CheckPackets();
1223
1224         if (rxp) {
1225             rxi_RestoreDataBufs(rxp);
1226         } else {
1227             rxp = rxi_AllocPacket(RX_PACKET_CLASS_RECEIVE);
1228             if (!rxp)
1229                 osi_Panic("rxk_Listener: No more Rx buffers!\n");
1230         }
1231         if (!(code = rxk_ReadPacket(rx_socket, rxp, &host, &port))) {
1232             rxp = rxi_ReceivePacket(rxp, rx_socket, host, port, 0, 0);
1233         }
1234     }
1235
1236 #ifdef RX_ENABLE_LOCKS
1237     AFS_GLOCK();
1238 #endif /* RX_ENABLE_LOCKS */
1239     if (afs_termState == AFSOP_STOP_RXK_LISTENER) {
1240 #ifdef AFS_SUN510_ENV
1241         afs_termState = AFSOP_STOP_NETIF;
1242 #else
1243         afs_termState = AFSOP_STOP_COMPLETE;
1244 #endif
1245         osi_rxWakeup(&afs_termState);
1246     }
1247     rxk_ListenerPid = 0;
1248 #ifdef AFS_LINUX20_ENV
1249     rxk_ListenerTask = 0;
1250     osi_rxWakeup(&rxk_ListenerTask);
1251 #endif
1252 #if defined(AFS_SUN5_ENV) || defined(AFS_FBSD_ENV)
1253     osi_rxWakeup(&rxk_ListenerPid);
1254 #endif
1255 }
1256
1257 #if !defined(AFS_LINUX20_ENV) && !defined(AFS_SUN5_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
1258 /* The manner of stopping the rx listener thread may vary. Most unix's should
1259  * be able to call soclose.
1260  */
1261 void
1262 osi_StopListener(void)
1263 {
1264     soclose(rx_socket);
1265 }
1266 #endif
1267 #endif /* RXK_LISTENER_ENV */
1268 #endif /* !NCR && !UKERNEL */
1269
1270 #if !defined(AFS_LINUX26_ENV)
1271 void
1272 #if defined(AFS_AIX_ENV)
1273 osi_Panic(char *msg, void *a1, void *a2, void *a3)
1274 #else
1275 osi_Panic(char *msg, ...)
1276 #endif
1277 {
1278 #ifdef AFS_AIX_ENV
1279     if (!msg)
1280         msg = "Unknown AFS panic";
1281     /*
1282      * we should probably use the errsave facility here. it is not
1283      * varargs-aware
1284      */
1285
1286     printf(msg, a1, a2, a3);
1287     panic(msg);
1288 #elif defined(AFS_SGI_ENV)
1289     va_list ap;
1290
1291     /* Solaris has vcmn_err, Sol10 01/06 may have issues. Beware. */
1292     if (!msg) {
1293         cmn_err(CE_PANIC, "Unknown AFS panic");
1294     } else {
1295         va_start(ap, msg);
1296         icmn_err(CE_PANIC, msg, ap);
1297         va_end(ap);
1298     }
1299 #elif defined(AFS_DARWIN80_ENV) || defined(AFS_LINUX22_ENV) || defined(AFS_FBSD_ENV) || defined(UKERNEL)
1300     char buf[256];
1301     va_list ap;
1302     if (!msg)
1303         msg = "Unknown AFS panic";
1304
1305     va_start(ap, msg);
1306     vsnprintf(buf, sizeof(buf), msg, ap);
1307     va_end(ap);
1308     printf("%s", buf);
1309     panic("%s", buf);
1310 #else
1311     va_list ap;
1312     if (!msg)
1313         msg = "Unknown AFS panic";
1314
1315     va_start(ap, msg);
1316     vprintf(msg, ap);
1317     va_end(ap);
1318 # ifdef AFS_LINUX20_ENV
1319     * ((char *) 0) = 0;
1320 # else
1321     panic("%s", msg);
1322 # endif
1323 #endif
1324 }
1325 #endif