clnt_vc.c revision 184588
1177633Sdfr/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */ 2177633Sdfr 3177633Sdfr/* 4177633Sdfr * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5177633Sdfr * unrestricted use provided that this legend is included on all tape 6177633Sdfr * media and as a part of the software program in whole or part. Users 7177633Sdfr * may copy or modify Sun RPC without charge, but are not authorized 8177633Sdfr * to license or distribute it to anyone else except as part of a product or 9177633Sdfr * program developed by the user. 10177633Sdfr * 11177633Sdfr * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12177633Sdfr * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13177633Sdfr * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14177633Sdfr * 15177633Sdfr * Sun RPC is provided with no support and without any obligation on the 16177633Sdfr * part of Sun Microsystems, Inc. to assist in its use, correction, 17177633Sdfr * modification or enhancement. 18177633Sdfr * 19177633Sdfr * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20177633Sdfr * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21177633Sdfr * OR ANY PART THEREOF. 22177633Sdfr * 23177633Sdfr * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24177633Sdfr * or profits or other special, indirect and consequential damages, even if 25177633Sdfr * Sun has been advised of the possibility of such damages. 26177633Sdfr * 27177633Sdfr * Sun Microsystems, Inc. 28177633Sdfr * 2550 Garcia Avenue 29177633Sdfr * Mountain View, California 94043 30177633Sdfr */ 31177633Sdfr 32177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 33177633Sdfrstatic char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 34177633Sdfrstatic char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35177633Sdfrstatic char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 36177633Sdfr#endif 37177633Sdfr#include <sys/cdefs.h> 38177633Sdfr__FBSDID("$FreeBSD: head/sys/rpc/clnt_vc.c 184588 2008-11-03 10:38:00Z dfr $"); 39177633Sdfr 40177633Sdfr/* 41177633Sdfr * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 42177633Sdfr * 43177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 44177633Sdfr * 45177633Sdfr * TCP based RPC supports 'batched calls'. 46177633Sdfr * A sequence of calls may be batched-up in a send buffer. The rpc call 47177633Sdfr * return immediately to the client even though the call was not necessarily 48177633Sdfr * sent. The batching occurs if the results' xdr routine is NULL (0) AND 49177633Sdfr * the rpc timeout value is zero (see clnt.h, rpc). 50177633Sdfr * 51177633Sdfr * Clients should NOT casually batch calls that in fact return results; that is, 52177633Sdfr * the server side should be aware that a call is batched and not produce any 53177633Sdfr * return message. Batched calls that produce many result messages can 54177633Sdfr * deadlock (netlock) the client and the server.... 55177633Sdfr * 56177633Sdfr * Now go hang yourself. 57177633Sdfr */ 58177633Sdfr 59177633Sdfr#include <sys/param.h> 60177633Sdfr#include <sys/systm.h> 61177633Sdfr#include <sys/lock.h> 62177633Sdfr#include <sys/malloc.h> 63177633Sdfr#include <sys/mbuf.h> 64177633Sdfr#include <sys/mutex.h> 65177633Sdfr#include <sys/pcpu.h> 66177633Sdfr#include <sys/proc.h> 67184588Sdfr#include <sys/protosw.h> 68177633Sdfr#include <sys/socket.h> 69177633Sdfr#include <sys/socketvar.h> 70177633Sdfr#include <sys/syslog.h> 71177633Sdfr#include <sys/time.h> 72177633Sdfr#include <sys/uio.h> 73184588Sdfr#include <netinet/tcp.h> 74177633Sdfr 75177633Sdfr#include <rpc/rpc.h> 76177685Sdfr#include <rpc/rpc_com.h> 77177633Sdfr 78177633Sdfr#define MCALL_MSG_SIZE 24 79177633Sdfr 80177633Sdfrstruct cmessage { 81177633Sdfr struct cmsghdr cmsg; 82177633Sdfr struct cmsgcred cmcred; 83177633Sdfr}; 84177633Sdfr 85180025Sdfrstatic enum clnt_stat clnt_vc_call(CLIENT *, struct rpc_callextra *, 86184588Sdfr rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 87177633Sdfrstatic void clnt_vc_geterr(CLIENT *, struct rpc_err *); 88177633Sdfrstatic bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *); 89177633Sdfrstatic void clnt_vc_abort(CLIENT *); 90177633Sdfrstatic bool_t clnt_vc_control(CLIENT *, u_int, void *); 91184588Sdfrstatic void clnt_vc_close(CLIENT *); 92177633Sdfrstatic void clnt_vc_destroy(CLIENT *); 93177633Sdfrstatic bool_t time_not_ok(struct timeval *); 94177633Sdfrstatic void clnt_vc_soupcall(struct socket *so, void *arg, int waitflag); 95177633Sdfr 96177633Sdfrstatic struct clnt_ops clnt_vc_ops = { 97177633Sdfr .cl_call = clnt_vc_call, 98177633Sdfr .cl_abort = clnt_vc_abort, 99177633Sdfr .cl_geterr = clnt_vc_geterr, 100177633Sdfr .cl_freeres = clnt_vc_freeres, 101184588Sdfr .cl_close = clnt_vc_close, 102177633Sdfr .cl_destroy = clnt_vc_destroy, 103177633Sdfr .cl_control = clnt_vc_control 104177633Sdfr}; 105177633Sdfr 106177633Sdfr/* 107180025Sdfr * A pending RPC request which awaits a reply. Requests which have 108180025Sdfr * received their reply will have cr_xid set to zero and cr_mrep to 109180025Sdfr * the mbuf chain of the reply. 110177633Sdfr */ 111177633Sdfrstruct ct_request { 112177633Sdfr TAILQ_ENTRY(ct_request) cr_link; 113177633Sdfr uint32_t cr_xid; /* XID of request */ 114177633Sdfr struct mbuf *cr_mrep; /* reply received by upcall */ 115177633Sdfr int cr_error; /* any error from upcall */ 116184588Sdfr char cr_verf[MAX_AUTH_BYTES]; /* reply verf */ 117177633Sdfr}; 118177633Sdfr 119177633SdfrTAILQ_HEAD(ct_request_list, ct_request); 120177633Sdfr 121177633Sdfrstruct ct_data { 122177633Sdfr struct mtx ct_lock; 123180025Sdfr int ct_threads; /* number of threads in clnt_vc_call */ 124184588Sdfr bool_t ct_closing; /* TRUE if we are closing */ 125184588Sdfr bool_t ct_closed; /* TRUE if we are closed */ 126177633Sdfr struct socket *ct_socket; /* connection socket */ 127177633Sdfr bool_t ct_closeit; /* close it on destroy */ 128177633Sdfr struct timeval ct_wait; /* wait interval in milliseconds */ 129177633Sdfr struct sockaddr_storage ct_addr; /* remote addr */ 130177633Sdfr struct rpc_err ct_error; 131177633Sdfr uint32_t ct_xid; 132177633Sdfr char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 133177633Sdfr size_t ct_mpos; /* pos after marshal */ 134177633Sdfr const char *ct_waitchan; 135177633Sdfr int ct_waitflag; 136177633Sdfr struct mbuf *ct_record; /* current reply record */ 137177633Sdfr size_t ct_record_resid; /* how much left of reply to read */ 138177633Sdfr bool_t ct_record_eor; /* true if reading last fragment */ 139177633Sdfr struct ct_request_list ct_pending; 140177633Sdfr}; 141177633Sdfr 142177633Sdfrstatic const char clnt_vc_errstr[] = "%s : %s"; 143177633Sdfrstatic const char clnt_vc_str[] = "clnt_vc_create"; 144177633Sdfrstatic const char clnt_read_vc_str[] = "read_vc"; 145177633Sdfrstatic const char __no_mem_str[] = "out of memory"; 146177633Sdfr 147177633Sdfr/* 148177633Sdfr * Create a client handle for a connection. 149177633Sdfr * Default options are set, which the user can change using clnt_control()'s. 150177633Sdfr * The rpc/vc package does buffering similar to stdio, so the client 151177633Sdfr * must pick send and receive buffer sizes, 0 => use the default. 152177633Sdfr * NB: fd is copied into a private area. 153177633Sdfr * NB: The rpch->cl_auth is set null authentication. Caller may wish to 154177633Sdfr * set this something more useful. 155177633Sdfr * 156177633Sdfr * fd should be an open socket 157177633Sdfr */ 158177633SdfrCLIENT * 159177633Sdfrclnt_vc_create( 160177633Sdfr struct socket *so, /* open file descriptor */ 161177633Sdfr struct sockaddr *raddr, /* servers address */ 162177633Sdfr const rpcprog_t prog, /* program number */ 163177633Sdfr const rpcvers_t vers, /* version number */ 164177633Sdfr size_t sendsz, /* buffer recv size */ 165177633Sdfr size_t recvsz) /* buffer send size */ 166177633Sdfr{ 167177633Sdfr CLIENT *cl; /* client handle */ 168177633Sdfr struct ct_data *ct = NULL; /* client handle */ 169177633Sdfr struct timeval now; 170177633Sdfr struct rpc_msg call_msg; 171177633Sdfr static uint32_t disrupt; 172177633Sdfr struct __rpc_sockinfo si; 173177633Sdfr XDR xdrs; 174184588Sdfr int error, interrupted, one = 1; 175184588Sdfr struct sockopt sopt; 176177633Sdfr 177177633Sdfr if (disrupt == 0) 178177633Sdfr disrupt = (uint32_t)(long)raddr; 179177633Sdfr 180177633Sdfr cl = (CLIENT *)mem_alloc(sizeof (*cl)); 181177633Sdfr ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 182177633Sdfr 183177633Sdfr mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF); 184180025Sdfr ct->ct_threads = 0; 185180025Sdfr ct->ct_closing = FALSE; 186184588Sdfr ct->ct_closed = FALSE; 187177633Sdfr 188177633Sdfr if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { 189177633Sdfr error = soconnect(so, raddr, curthread); 190180025Sdfr SOCK_LOCK(so); 191180025Sdfr interrupted = 0; 192180025Sdfr while ((so->so_state & SS_ISCONNECTING) 193180025Sdfr && so->so_error == 0) { 194180025Sdfr error = msleep(&so->so_timeo, SOCK_MTX(so), 195180025Sdfr PSOCK | PCATCH, "connec", 0); 196180025Sdfr if (error) { 197180025Sdfr if (error == EINTR || error == ERESTART) 198180025Sdfr interrupted = 1; 199180025Sdfr break; 200180025Sdfr } 201180025Sdfr } 202180025Sdfr if (error == 0) { 203180025Sdfr error = so->so_error; 204180025Sdfr so->so_error = 0; 205180025Sdfr } 206180025Sdfr SOCK_UNLOCK(so); 207177633Sdfr if (error) { 208180025Sdfr if (!interrupted) 209180025Sdfr so->so_state &= ~SS_ISCONNECTING; 210177633Sdfr rpc_createerr.cf_stat = RPC_SYSTEMERROR; 211177633Sdfr rpc_createerr.cf_error.re_errno = error; 212177633Sdfr goto err; 213177633Sdfr } 214177633Sdfr } 215177633Sdfr 216177633Sdfr if (!__rpc_socket2sockinfo(so, &si)) 217177633Sdfr goto err; 218177633Sdfr 219184588Sdfr if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 220184588Sdfr bzero(&sopt, sizeof(sopt)); 221184588Sdfr sopt.sopt_dir = SOPT_SET; 222184588Sdfr sopt.sopt_level = SOL_SOCKET; 223184588Sdfr sopt.sopt_name = SO_KEEPALIVE; 224184588Sdfr sopt.sopt_val = &one; 225184588Sdfr sopt.sopt_valsize = sizeof(one); 226184588Sdfr sosetopt(so, &sopt); 227184588Sdfr } 228184588Sdfr 229184588Sdfr if (so->so_proto->pr_protocol == IPPROTO_TCP) { 230184588Sdfr bzero(&sopt, sizeof(sopt)); 231184588Sdfr sopt.sopt_dir = SOPT_SET; 232184588Sdfr sopt.sopt_level = IPPROTO_TCP; 233184588Sdfr sopt.sopt_name = TCP_NODELAY; 234184588Sdfr sopt.sopt_val = &one; 235184588Sdfr sopt.sopt_valsize = sizeof(one); 236184588Sdfr sosetopt(so, &sopt); 237184588Sdfr } 238184588Sdfr 239177633Sdfr ct->ct_closeit = FALSE; 240177633Sdfr 241177633Sdfr /* 242177633Sdfr * Set up private data struct 243177633Sdfr */ 244177633Sdfr ct->ct_socket = so; 245177633Sdfr ct->ct_wait.tv_sec = -1; 246177633Sdfr ct->ct_wait.tv_usec = -1; 247177633Sdfr memcpy(&ct->ct_addr, raddr, raddr->sa_len); 248177633Sdfr 249177633Sdfr /* 250177633Sdfr * Initialize call message 251177633Sdfr */ 252177633Sdfr getmicrotime(&now); 253177633Sdfr ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now); 254177633Sdfr call_msg.rm_xid = ct->ct_xid; 255177633Sdfr call_msg.rm_direction = CALL; 256177633Sdfr call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 257177633Sdfr call_msg.rm_call.cb_prog = (uint32_t)prog; 258177633Sdfr call_msg.rm_call.cb_vers = (uint32_t)vers; 259177633Sdfr 260177633Sdfr /* 261177633Sdfr * pre-serialize the static part of the call msg and stash it away 262177633Sdfr */ 263177633Sdfr xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE, 264177633Sdfr XDR_ENCODE); 265177633Sdfr if (! xdr_callhdr(&xdrs, &call_msg)) { 266177633Sdfr if (ct->ct_closeit) { 267177633Sdfr soclose(ct->ct_socket); 268177633Sdfr } 269177633Sdfr goto err; 270177633Sdfr } 271177633Sdfr ct->ct_mpos = XDR_GETPOS(&xdrs); 272177633Sdfr XDR_DESTROY(&xdrs); 273177633Sdfr ct->ct_waitchan = "rpcrecv"; 274177633Sdfr ct->ct_waitflag = 0; 275177633Sdfr 276177633Sdfr /* 277177633Sdfr * Create a client handle which uses xdrrec for serialization 278177633Sdfr * and authnone for authentication. 279177633Sdfr */ 280180025Sdfr cl->cl_refs = 1; 281177633Sdfr cl->cl_ops = &clnt_vc_ops; 282177633Sdfr cl->cl_private = ct; 283177633Sdfr cl->cl_auth = authnone_create(); 284177633Sdfr sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 285177633Sdfr recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 286184588Sdfr soreserve(ct->ct_socket, sendsz, recvsz); 287177633Sdfr 288177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 289177633Sdfr ct->ct_socket->so_upcallarg = ct; 290177633Sdfr ct->ct_socket->so_upcall = clnt_vc_soupcall; 291177633Sdfr ct->ct_socket->so_rcv.sb_flags |= SB_UPCALL; 292177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 293177633Sdfr 294177633Sdfr ct->ct_record = NULL; 295177633Sdfr ct->ct_record_resid = 0; 296177633Sdfr TAILQ_INIT(&ct->ct_pending); 297177633Sdfr return (cl); 298177633Sdfr 299177633Sdfrerr: 300177633Sdfr if (cl) { 301177633Sdfr if (ct) { 302177633Sdfr mem_free(ct, sizeof (struct ct_data)); 303177633Sdfr } 304177633Sdfr if (cl) 305177633Sdfr mem_free(cl, sizeof (CLIENT)); 306177633Sdfr } 307177633Sdfr return ((CLIENT *)NULL); 308177633Sdfr} 309177633Sdfr 310177633Sdfrstatic enum clnt_stat 311177633Sdfrclnt_vc_call( 312184588Sdfr CLIENT *cl, /* client handle */ 313184588Sdfr struct rpc_callextra *ext, /* call metadata */ 314184588Sdfr rpcproc_t proc, /* procedure number */ 315184588Sdfr struct mbuf *args, /* pointer to args */ 316184588Sdfr struct mbuf **resultsp, /* pointer to results */ 317184588Sdfr struct timeval utimeout) 318177633Sdfr{ 319177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 320180025Sdfr AUTH *auth; 321184588Sdfr struct rpc_err *errp; 322184588Sdfr enum clnt_stat stat; 323177633Sdfr XDR xdrs; 324177633Sdfr struct rpc_msg reply_msg; 325177633Sdfr bool_t ok; 326177633Sdfr int nrefreshes = 2; /* number of times to refresh cred */ 327177633Sdfr struct timeval timeout; 328177633Sdfr uint32_t xid; 329184588Sdfr struct mbuf *mreq = NULL, *results; 330180025Sdfr struct ct_request *cr; 331177633Sdfr int error; 332177633Sdfr 333180025Sdfr cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK); 334180025Sdfr 335177633Sdfr mtx_lock(&ct->ct_lock); 336177633Sdfr 337184588Sdfr if (ct->ct_closing || ct->ct_closed) { 338180025Sdfr mtx_unlock(&ct->ct_lock); 339180025Sdfr free(cr, M_RPC); 340180025Sdfr return (RPC_CANTSEND); 341180025Sdfr } 342180025Sdfr ct->ct_threads++; 343177633Sdfr 344184588Sdfr if (ext) { 345180025Sdfr auth = ext->rc_auth; 346184588Sdfr errp = &ext->rc_err; 347184588Sdfr } else { 348180025Sdfr auth = cl->cl_auth; 349184588Sdfr errp = &ct->ct_error; 350184588Sdfr } 351180025Sdfr 352180025Sdfr cr->cr_mrep = NULL; 353180025Sdfr cr->cr_error = 0; 354180025Sdfr 355177633Sdfr if (ct->ct_wait.tv_usec == -1) { 356177633Sdfr timeout = utimeout; /* use supplied timeout */ 357177633Sdfr } else { 358177633Sdfr timeout = ct->ct_wait; /* use default timeout */ 359177633Sdfr } 360177633Sdfr 361177633Sdfrcall_again: 362177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 363177633Sdfr 364177633Sdfr ct->ct_xid++; 365177633Sdfr xid = ct->ct_xid; 366177633Sdfr 367177633Sdfr mtx_unlock(&ct->ct_lock); 368177633Sdfr 369177633Sdfr /* 370177633Sdfr * Leave space to pre-pend the record mark. 371177633Sdfr */ 372177633Sdfr MGETHDR(mreq, M_WAIT, MT_DATA); 373177633Sdfr mreq->m_data += sizeof(uint32_t); 374184588Sdfr KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN, 375184588Sdfr ("RPC header too big")); 376184588Sdfr bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos); 377184588Sdfr mreq->m_len = ct->ct_mpos; 378177633Sdfr 379177633Sdfr /* 380177633Sdfr * The XID is the first thing in the request. 381177633Sdfr */ 382177633Sdfr *mtod(mreq, uint32_t *) = htonl(xid); 383177633Sdfr 384177633Sdfr xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 385177633Sdfr 386184588Sdfr errp->re_status = stat = RPC_SUCCESS; 387177633Sdfr 388177633Sdfr if ((! XDR_PUTINT32(&xdrs, &proc)) || 389184588Sdfr (! AUTH_MARSHALL(auth, xid, &xdrs, 390184588Sdfr m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 391184588Sdfr errp->re_status = stat = RPC_CANTENCODEARGS; 392180025Sdfr mtx_lock(&ct->ct_lock); 393180025Sdfr goto out; 394177633Sdfr } 395184588Sdfr mreq->m_pkthdr.len = m_length(mreq, NULL); 396177633Sdfr 397177633Sdfr /* 398177633Sdfr * Prepend a record marker containing the packet length. 399177633Sdfr */ 400177633Sdfr M_PREPEND(mreq, sizeof(uint32_t), M_WAIT); 401177633Sdfr *mtod(mreq, uint32_t *) = 402177633Sdfr htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t))); 403177633Sdfr 404180025Sdfr cr->cr_xid = xid; 405177633Sdfr mtx_lock(&ct->ct_lock); 406180025Sdfr TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link); 407177633Sdfr mtx_unlock(&ct->ct_lock); 408177633Sdfr 409177633Sdfr /* 410177633Sdfr * sosend consumes mreq. 411177633Sdfr */ 412177633Sdfr error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread); 413177633Sdfr mreq = NULL; 414184588Sdfr if (error == EMSGSIZE) { 415184588Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_snd); 416184588Sdfr sbwait(&ct->ct_socket->so_snd); 417184588Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_snd); 418184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 419184588Sdfr mtx_lock(&ct->ct_lock); 420184588Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 421184588Sdfr goto call_again; 422184588Sdfr } 423177633Sdfr 424184588Sdfr reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 425184588Sdfr reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 426184588Sdfr reply_msg.acpted_rply.ar_verf.oa_length = 0; 427184588Sdfr reply_msg.acpted_rply.ar_results.where = NULL; 428184588Sdfr reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 429177633Sdfr 430177633Sdfr mtx_lock(&ct->ct_lock); 431177633Sdfr if (error) { 432180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 433184588Sdfr errp->re_errno = error; 434184588Sdfr errp->re_status = stat = RPC_CANTSEND; 435177633Sdfr goto out; 436177633Sdfr } 437177633Sdfr 438177633Sdfr /* 439177633Sdfr * Check to see if we got an upcall while waiting for the 440177633Sdfr * lock. In both these cases, the request has been removed 441177633Sdfr * from ct->ct_pending. 442177633Sdfr */ 443180025Sdfr if (cr->cr_error) { 444180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 445184588Sdfr errp->re_errno = cr->cr_error; 446184588Sdfr errp->re_status = stat = RPC_CANTRECV; 447177633Sdfr goto out; 448177633Sdfr } 449180025Sdfr if (cr->cr_mrep) { 450180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 451177633Sdfr goto got_reply; 452177633Sdfr } 453177633Sdfr 454177633Sdfr /* 455177633Sdfr * Hack to provide rpc-based message passing 456177633Sdfr */ 457177633Sdfr if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 458180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 459184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 460177633Sdfr goto out; 461177633Sdfr } 462177633Sdfr 463180025Sdfr error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan, 464177633Sdfr tvtohz(&timeout)); 465177633Sdfr 466180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 467180025Sdfr 468177633Sdfr if (error) { 469177633Sdfr /* 470177633Sdfr * The sleep returned an error so our request is still 471177633Sdfr * on the list. Turn the error code into an 472177633Sdfr * appropriate client status. 473177633Sdfr */ 474184588Sdfr errp->re_errno = error; 475177633Sdfr switch (error) { 476177633Sdfr case EINTR: 477184588Sdfr stat = RPC_INTR; 478177633Sdfr break; 479177633Sdfr case EWOULDBLOCK: 480184588Sdfr stat = RPC_TIMEDOUT; 481177633Sdfr break; 482177633Sdfr default: 483184588Sdfr stat = RPC_CANTRECV; 484177633Sdfr } 485184588Sdfr errp->re_status = stat; 486177633Sdfr goto out; 487177633Sdfr } else { 488177633Sdfr /* 489177633Sdfr * We were woken up by the upcall. If the 490177633Sdfr * upcall had a receive error, report that, 491177633Sdfr * otherwise we have a reply. 492177633Sdfr */ 493180025Sdfr if (cr->cr_error) { 494184588Sdfr errp->re_errno = cr->cr_error; 495184588Sdfr errp->re_status = stat = RPC_CANTRECV; 496177633Sdfr goto out; 497177633Sdfr } 498177633Sdfr } 499177633Sdfr 500177633Sdfrgot_reply: 501177633Sdfr /* 502177633Sdfr * Now decode and validate the response. We need to drop the 503177633Sdfr * lock since xdr_replymsg may end up sleeping in malloc. 504177633Sdfr */ 505177633Sdfr mtx_unlock(&ct->ct_lock); 506177633Sdfr 507184588Sdfr if (ext && ext->rc_feedback) 508184588Sdfr ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 509184588Sdfr 510180025Sdfr xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 511177633Sdfr ok = xdr_replymsg(&xdrs, &reply_msg); 512180025Sdfr cr->cr_mrep = NULL; 513177633Sdfr 514177633Sdfr if (ok) { 515177633Sdfr if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 516184588Sdfr (reply_msg.acpted_rply.ar_stat == SUCCESS)) 517184588Sdfr errp->re_status = stat = RPC_SUCCESS; 518177633Sdfr else 519184588Sdfr stat = _seterr_reply(&reply_msg, errp); 520177633Sdfr 521184588Sdfr if (stat == RPC_SUCCESS) { 522184588Sdfr results = xdrmbuf_getall(&xdrs); 523184588Sdfr if (!AUTH_VALIDATE(auth, xid, 524184588Sdfr &reply_msg.acpted_rply.ar_verf, 525184588Sdfr &results)) { 526184588Sdfr errp->re_status = stat = RPC_AUTHERROR; 527184588Sdfr errp->re_why = AUTH_INVALIDRESP; 528184588Sdfr } else { 529184588Sdfr KASSERT(results, 530184588Sdfr ("auth validated but no result")); 531184588Sdfr *resultsp = results; 532177633Sdfr } 533177633Sdfr } /* end successful completion */ 534177633Sdfr /* 535177633Sdfr * If unsuccesful AND error is an authentication error 536177633Sdfr * then refresh credentials and try again, else break 537177633Sdfr */ 538184588Sdfr else if (stat == RPC_AUTHERROR) 539177633Sdfr /* maybe our credentials need to be refreshed ... */ 540177633Sdfr if (nrefreshes > 0 && 541184588Sdfr AUTH_REFRESH(auth, &reply_msg)) { 542177633Sdfr nrefreshes--; 543184588Sdfr XDR_DESTROY(&xdrs); 544184588Sdfr mtx_lock(&ct->ct_lock); 545177633Sdfr goto call_again; 546177633Sdfr } 547177633Sdfr /* end of unsuccessful completion */ 548177633Sdfr } /* end of valid reply message */ 549177633Sdfr else { 550184588Sdfr errp->re_status = stat = RPC_CANTDECODERES; 551177633Sdfr } 552184588Sdfr XDR_DESTROY(&xdrs); 553184588Sdfr mtx_lock(&ct->ct_lock); 554177633Sdfrout: 555177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 556177633Sdfr 557184588Sdfr KASSERT(stat != RPC_SUCCESS || *resultsp, 558184588Sdfr ("RPC_SUCCESS without reply")); 559184588Sdfr 560177633Sdfr if (mreq) 561177633Sdfr m_freem(mreq); 562180025Sdfr if (cr->cr_mrep) 563180025Sdfr m_freem(cr->cr_mrep); 564177633Sdfr 565180025Sdfr ct->ct_threads--; 566180025Sdfr if (ct->ct_closing) 567180025Sdfr wakeup(ct); 568180025Sdfr 569177633Sdfr mtx_unlock(&ct->ct_lock); 570180025Sdfr 571184588Sdfr if (auth && stat != RPC_SUCCESS) 572184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 573184588Sdfr 574180025Sdfr free(cr, M_RPC); 575180025Sdfr 576184588Sdfr return (stat); 577177633Sdfr} 578177633Sdfr 579177633Sdfrstatic void 580177633Sdfrclnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 581177633Sdfr{ 582177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 583177633Sdfr 584177633Sdfr *errp = ct->ct_error; 585177633Sdfr} 586177633Sdfr 587177633Sdfrstatic bool_t 588177633Sdfrclnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 589177633Sdfr{ 590177633Sdfr XDR xdrs; 591177633Sdfr bool_t dummy; 592177633Sdfr 593177633Sdfr xdrs.x_op = XDR_FREE; 594177633Sdfr dummy = (*xdr_res)(&xdrs, res_ptr); 595177633Sdfr 596177633Sdfr return (dummy); 597177633Sdfr} 598177633Sdfr 599177633Sdfr/*ARGSUSED*/ 600177633Sdfrstatic void 601177633Sdfrclnt_vc_abort(CLIENT *cl) 602177633Sdfr{ 603177633Sdfr} 604177633Sdfr 605177633Sdfrstatic bool_t 606177633Sdfrclnt_vc_control(CLIENT *cl, u_int request, void *info) 607177633Sdfr{ 608177633Sdfr struct ct_data *ct = (struct ct_data *)cl->cl_private; 609177633Sdfr void *infop = info; 610177633Sdfr 611177633Sdfr mtx_lock(&ct->ct_lock); 612177633Sdfr 613177633Sdfr switch (request) { 614177633Sdfr case CLSET_FD_CLOSE: 615177633Sdfr ct->ct_closeit = TRUE; 616177633Sdfr mtx_unlock(&ct->ct_lock); 617177633Sdfr return (TRUE); 618177633Sdfr case CLSET_FD_NCLOSE: 619177633Sdfr ct->ct_closeit = FALSE; 620177633Sdfr mtx_unlock(&ct->ct_lock); 621177633Sdfr return (TRUE); 622177633Sdfr default: 623177633Sdfr break; 624177633Sdfr } 625177633Sdfr 626177633Sdfr /* for other requests which use info */ 627177633Sdfr if (info == NULL) { 628177633Sdfr mtx_unlock(&ct->ct_lock); 629177633Sdfr return (FALSE); 630177633Sdfr } 631177633Sdfr switch (request) { 632177633Sdfr case CLSET_TIMEOUT: 633177633Sdfr if (time_not_ok((struct timeval *)info)) { 634177633Sdfr mtx_unlock(&ct->ct_lock); 635177633Sdfr return (FALSE); 636177633Sdfr } 637177633Sdfr ct->ct_wait = *(struct timeval *)infop; 638177633Sdfr break; 639177633Sdfr case CLGET_TIMEOUT: 640177633Sdfr *(struct timeval *)infop = ct->ct_wait; 641177633Sdfr break; 642177633Sdfr case CLGET_SERVER_ADDR: 643177633Sdfr (void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len); 644177633Sdfr break; 645177633Sdfr case CLGET_SVC_ADDR: 646177633Sdfr /* 647177633Sdfr * Slightly different semantics to userland - we use 648177633Sdfr * sockaddr instead of netbuf. 649177633Sdfr */ 650177633Sdfr memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len); 651177633Sdfr break; 652177633Sdfr case CLSET_SVC_ADDR: /* set to new address */ 653177633Sdfr mtx_unlock(&ct->ct_lock); 654177633Sdfr return (FALSE); 655177633Sdfr case CLGET_XID: 656177633Sdfr *(uint32_t *)info = ct->ct_xid; 657177633Sdfr break; 658177633Sdfr case CLSET_XID: 659177633Sdfr /* This will set the xid of the NEXT call */ 660177633Sdfr /* decrement by 1 as clnt_vc_call() increments once */ 661177633Sdfr ct->ct_xid = *(uint32_t *)info - 1; 662177633Sdfr break; 663177633Sdfr case CLGET_VERS: 664177633Sdfr /* 665177633Sdfr * This RELIES on the information that, in the call body, 666177633Sdfr * the version number field is the fifth field from the 667177633Sdfr * begining of the RPC header. MUST be changed if the 668177633Sdfr * call_struct is changed 669177633Sdfr */ 670177633Sdfr *(uint32_t *)info = 671177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 672177633Sdfr 4 * BYTES_PER_XDR_UNIT)); 673177633Sdfr break; 674177633Sdfr 675177633Sdfr case CLSET_VERS: 676177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 677177633Sdfr 4 * BYTES_PER_XDR_UNIT) = 678177633Sdfr htonl(*(uint32_t *)info); 679177633Sdfr break; 680177633Sdfr 681177633Sdfr case CLGET_PROG: 682177633Sdfr /* 683177633Sdfr * This RELIES on the information that, in the call body, 684177633Sdfr * the program number field is the fourth field from the 685177633Sdfr * begining of the RPC header. MUST be changed if the 686177633Sdfr * call_struct is changed 687177633Sdfr */ 688177633Sdfr *(uint32_t *)info = 689177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 690177633Sdfr 3 * BYTES_PER_XDR_UNIT)); 691177633Sdfr break; 692177633Sdfr 693177633Sdfr case CLSET_PROG: 694177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 695177633Sdfr 3 * BYTES_PER_XDR_UNIT) = 696177633Sdfr htonl(*(uint32_t *)info); 697177633Sdfr break; 698177633Sdfr 699177633Sdfr case CLSET_WAITCHAN: 700184588Sdfr ct->ct_waitchan = (const char *)info; 701177633Sdfr break; 702177633Sdfr 703177633Sdfr case CLGET_WAITCHAN: 704177633Sdfr *(const char **) info = ct->ct_waitchan; 705177633Sdfr break; 706177633Sdfr 707177633Sdfr case CLSET_INTERRUPTIBLE: 708177633Sdfr if (*(int *) info) 709177633Sdfr ct->ct_waitflag = PCATCH; 710177633Sdfr else 711177633Sdfr ct->ct_waitflag = 0; 712177633Sdfr break; 713177633Sdfr 714177633Sdfr case CLGET_INTERRUPTIBLE: 715177633Sdfr if (ct->ct_waitflag) 716177633Sdfr *(int *) info = TRUE; 717177633Sdfr else 718177633Sdfr *(int *) info = FALSE; 719177633Sdfr break; 720177633Sdfr 721177633Sdfr default: 722177633Sdfr mtx_unlock(&ct->ct_lock); 723177633Sdfr return (FALSE); 724177633Sdfr } 725177633Sdfr 726177633Sdfr mtx_unlock(&ct->ct_lock); 727177633Sdfr return (TRUE); 728177633Sdfr} 729177633Sdfr 730177633Sdfrstatic void 731184588Sdfrclnt_vc_close(CLIENT *cl) 732177633Sdfr{ 733177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 734180025Sdfr struct ct_request *cr; 735177633Sdfr 736177633Sdfr mtx_lock(&ct->ct_lock); 737177633Sdfr 738184588Sdfr if (ct->ct_closed) { 739184588Sdfr mtx_unlock(&ct->ct_lock); 740184588Sdfr return; 741184588Sdfr } 742184588Sdfr 743184588Sdfr if (ct->ct_closing) { 744184588Sdfr while (ct->ct_closing) 745184588Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 746184588Sdfr KASSERT(ct->ct_closed, ("client should be closed")); 747184588Sdfr mtx_unlock(&ct->ct_lock); 748184588Sdfr return; 749184588Sdfr } 750184588Sdfr 751177633Sdfr if (ct->ct_socket) { 752177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 753177633Sdfr ct->ct_socket->so_upcallarg = NULL; 754177633Sdfr ct->ct_socket->so_upcall = NULL; 755177633Sdfr ct->ct_socket->so_rcv.sb_flags &= ~SB_UPCALL; 756177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 757177633Sdfr 758180025Sdfr /* 759180025Sdfr * Abort any pending requests and wait until everyone 760180025Sdfr * has finished with clnt_vc_call. 761180025Sdfr */ 762180025Sdfr ct->ct_closing = TRUE; 763180025Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 764180025Sdfr cr->cr_xid = 0; 765180025Sdfr cr->cr_error = ESHUTDOWN; 766180025Sdfr wakeup(cr); 767180025Sdfr } 768177633Sdfr 769180025Sdfr while (ct->ct_threads) 770180025Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 771184588Sdfr } 772180025Sdfr 773184588Sdfr ct->ct_closing = FALSE; 774184588Sdfr ct->ct_closed = TRUE; 775184588Sdfr mtx_unlock(&ct->ct_lock); 776184588Sdfr wakeup(ct); 777184588Sdfr} 778184588Sdfr 779184588Sdfrstatic void 780184588Sdfrclnt_vc_destroy(CLIENT *cl) 781184588Sdfr{ 782184588Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 783184588Sdfr struct socket *so = NULL; 784184588Sdfr 785184588Sdfr clnt_vc_close(cl); 786184588Sdfr 787184588Sdfr mtx_lock(&ct->ct_lock); 788184588Sdfr 789184588Sdfr if (ct->ct_socket) { 790177633Sdfr if (ct->ct_closeit) { 791177633Sdfr so = ct->ct_socket; 792177633Sdfr } 793177633Sdfr } 794177633Sdfr 795177633Sdfr mtx_unlock(&ct->ct_lock); 796177633Sdfr 797177633Sdfr mtx_destroy(&ct->ct_lock); 798177633Sdfr if (so) { 799177633Sdfr soshutdown(so, SHUT_WR); 800177633Sdfr soclose(so); 801177633Sdfr } 802177633Sdfr mem_free(ct, sizeof(struct ct_data)); 803177633Sdfr mem_free(cl, sizeof(CLIENT)); 804177633Sdfr} 805177633Sdfr 806177633Sdfr/* 807177633Sdfr * Make sure that the time is not garbage. -1 value is disallowed. 808177633Sdfr * Note this is different from time_not_ok in clnt_dg.c 809177633Sdfr */ 810177633Sdfrstatic bool_t 811177633Sdfrtime_not_ok(struct timeval *t) 812177633Sdfr{ 813177633Sdfr return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 814177633Sdfr t->tv_usec <= -1 || t->tv_usec > 1000000); 815177633Sdfr} 816177633Sdfr 817177633Sdfrvoid 818177633Sdfrclnt_vc_soupcall(struct socket *so, void *arg, int waitflag) 819177633Sdfr{ 820177633Sdfr struct ct_data *ct = (struct ct_data *) arg; 821177633Sdfr struct uio uio; 822177633Sdfr struct mbuf *m; 823177633Sdfr struct ct_request *cr; 824177633Sdfr int error, rcvflag, foundreq; 825177633Sdfr uint32_t xid, header; 826184588Sdfr bool_t do_read; 827177633Sdfr 828177633Sdfr uio.uio_td = curthread; 829177633Sdfr do { 830177633Sdfr /* 831177633Sdfr * If ct_record_resid is zero, we are waiting for a 832177633Sdfr * record mark. 833177633Sdfr */ 834177633Sdfr if (ct->ct_record_resid == 0) { 835177633Sdfr 836177633Sdfr /* 837177633Sdfr * Make sure there is either a whole record 838177633Sdfr * mark in the buffer or there is some other 839177633Sdfr * error condition 840177633Sdfr */ 841177633Sdfr do_read = FALSE; 842177633Sdfr SOCKBUF_LOCK(&so->so_rcv); 843177633Sdfr if (so->so_rcv.sb_cc >= sizeof(uint32_t) 844177633Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 845177633Sdfr || so->so_error) 846177633Sdfr do_read = TRUE; 847177633Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 848177633Sdfr 849177633Sdfr if (!do_read) 850177633Sdfr return; 851177633Sdfr 852177633Sdfr uio.uio_resid = sizeof(uint32_t); 853177633Sdfr m = NULL; 854177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 855177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 856177633Sdfr 857177633Sdfr if (error == EWOULDBLOCK) 858177633Sdfr break; 859177633Sdfr 860177633Sdfr /* 861177633Sdfr * If there was an error, wake up all pending 862177633Sdfr * requests. 863177633Sdfr */ 864177633Sdfr if (error || uio.uio_resid > 0) { 865177633Sdfr wakeup_all: 866177633Sdfr mtx_lock(&ct->ct_lock); 867177633Sdfr if (!error) { 868177633Sdfr /* 869177633Sdfr * We must have got EOF trying 870177633Sdfr * to read from the stream. 871177633Sdfr */ 872177633Sdfr error = ECONNRESET; 873177633Sdfr } 874177633Sdfr ct->ct_error.re_status = RPC_CANTRECV; 875177633Sdfr ct->ct_error.re_errno = error; 876177633Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 877177633Sdfr cr->cr_error = error; 878177633Sdfr wakeup(cr); 879177633Sdfr } 880177633Sdfr mtx_unlock(&ct->ct_lock); 881177633Sdfr break; 882177633Sdfr } 883184588Sdfr bcopy(mtod(m, uint32_t *), &header, sizeof(uint32_t)); 884177633Sdfr header = ntohl(header); 885177633Sdfr ct->ct_record = NULL; 886177633Sdfr ct->ct_record_resid = header & 0x7fffffff; 887177633Sdfr ct->ct_record_eor = ((header & 0x80000000) != 0); 888177633Sdfr m_freem(m); 889177633Sdfr } else { 890177633Sdfr /* 891184588Sdfr * Wait until the socket has the whole record 892184588Sdfr * buffered. 893184588Sdfr */ 894184588Sdfr do_read = FALSE; 895184588Sdfr SOCKBUF_LOCK(&so->so_rcv); 896184588Sdfr if (so->so_rcv.sb_cc >= ct->ct_record_resid 897184588Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 898184588Sdfr || so->so_error) 899184588Sdfr do_read = TRUE; 900184588Sdfr SOCKBUF_UNLOCK(&so->so_rcv); 901184588Sdfr 902184588Sdfr if (!do_read) 903184588Sdfr return; 904184588Sdfr 905184588Sdfr /* 906177633Sdfr * We have the record mark. Read as much as 907177633Sdfr * the socket has buffered up to the end of 908177633Sdfr * this record. 909177633Sdfr */ 910177633Sdfr uio.uio_resid = ct->ct_record_resid; 911177633Sdfr m = NULL; 912177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 913177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 914177633Sdfr 915177633Sdfr if (error == EWOULDBLOCK) 916177633Sdfr break; 917177633Sdfr 918177633Sdfr if (error || uio.uio_resid == ct->ct_record_resid) 919177633Sdfr goto wakeup_all; 920177633Sdfr 921177633Sdfr /* 922177633Sdfr * If we have part of the record already, 923177633Sdfr * chain this bit onto the end. 924177633Sdfr */ 925177633Sdfr if (ct->ct_record) 926177633Sdfr m_last(ct->ct_record)->m_next = m; 927177633Sdfr else 928177633Sdfr ct->ct_record = m; 929177633Sdfr 930177633Sdfr ct->ct_record_resid = uio.uio_resid; 931177633Sdfr 932177633Sdfr /* 933177633Sdfr * If we have the entire record, see if we can 934177633Sdfr * match it to a request. 935177633Sdfr */ 936177633Sdfr if (ct->ct_record_resid == 0 937177633Sdfr && ct->ct_record_eor) { 938177633Sdfr /* 939177633Sdfr * The XID is in the first uint32_t of 940177633Sdfr * the reply. 941177633Sdfr */ 942184588Sdfr if (ct->ct_record->m_len < sizeof(xid)) 943184588Sdfr ct->ct_record = 944184588Sdfr m_pullup(ct->ct_record, 945184588Sdfr sizeof(xid)); 946177633Sdfr if (!ct->ct_record) 947177633Sdfr break; 948184588Sdfr bcopy(mtod(ct->ct_record, uint32_t *), 949184588Sdfr &xid, sizeof(uint32_t)); 950177633Sdfr xid = ntohl(xid); 951177633Sdfr 952177633Sdfr mtx_lock(&ct->ct_lock); 953177633Sdfr foundreq = 0; 954177633Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 955177633Sdfr if (cr->cr_xid == xid) { 956177633Sdfr /* 957177633Sdfr * This one 958180025Sdfr * matches. We leave 959180025Sdfr * the reply mbuf in 960177633Sdfr * cr->cr_mrep. Set 961177633Sdfr * the XID to zero so 962180025Sdfr * that we will ignore 963180025Sdfr * any duplicaed 964180025Sdfr * replies. 965177633Sdfr */ 966177633Sdfr cr->cr_xid = 0; 967177633Sdfr cr->cr_mrep = ct->ct_record; 968177633Sdfr cr->cr_error = 0; 969177633Sdfr foundreq = 1; 970177633Sdfr wakeup(cr); 971177633Sdfr break; 972177633Sdfr } 973177633Sdfr } 974177633Sdfr mtx_unlock(&ct->ct_lock); 975177633Sdfr 976177633Sdfr if (!foundreq) 977177633Sdfr m_freem(ct->ct_record); 978177633Sdfr ct->ct_record = NULL; 979177633Sdfr } 980177633Sdfr } 981177633Sdfr } while (m); 982177633Sdfr} 983