Bug Summary

File:src/lib/libc/rpc/clnt_tcp.c
Warning:line 299, column 16
Called function pointer is null (null dereference)

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name clnt_tcp.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/lib/libc/obj -resource-dir /usr/local/llvm16/lib/clang/16 -include namespace.h -I /usr/src/lib/libc/include -I /usr/src/lib/libc/hidden -D __LIBC__ -D APIWARN -D YP -I /usr/src/lib/libc/yp -I /usr/src/lib/libc -I /usr/src/lib/libc/gdtoa -I /usr/src/lib/libc/arch/amd64/gdtoa -D INFNAN_CHECK -D MULTIPLE_THREADS -D NO_FENV_H -D USE_LOCALE -I /usr/src/lib/libc -I /usr/src/lib/libc/citrus -D RESOLVSORT -D FLOATING_POINT -D PRINTF_WIDE_CHAR -D SCANF_WIDE_CHAR -D FUTEX -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/lib/libc/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/lib/libc/rpc/clnt_tcp.c
1/* $OpenBSD: clnt_tcp.c,v 1.36 2022/07/15 17:33:28 deraadt Exp $ */
2
3/*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * clnt_tcp.c, Implements a TCP/IP based, client side RPC.
36 *
37 * TCP based RPC supports 'batched calls'.
38 * A sequence of calls may be batched-up in a send buffer. The rpc call
39 * return immediately to the client even though the call was not necessarily
40 * sent. The batching occurs if the results' xdr routine is NULL (0) AND
41 * the rpc timeout value is zero (see clnt.h, rpc).
42 *
43 * Clients should NOT casually batch calls that in fact return results; that is,
44 * the server side should be aware that a call is batched and not produce any
45 * return message. Batched calls that produce many result messages can
46 * deadlock (netlock) the client and the server....
47 *
48 * Now go hang yourself.
49 */
50
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55#include <rpc/rpc.h>
56#include <sys/socket.h>
57#include <netdb.h>
58#include <errno(*__errno()).h>
59#include <rpc/pmap_clnt.h>
60
61#define MCALL_MSG_SIZE24 24
62
63static enum clnt_stat clnttcp_call(CLIENT *, u_long, xdrproc_t, caddr_t,
64 xdrproc_t, caddr_t, struct timeval);
65static void clnttcp_abort(CLIENT *);
66static void clnttcp_geterr(CLIENT *, struct rpc_err *);
67static bool_tint32_t clnttcp_freeres(CLIENT *, xdrproc_t, caddr_t);
68static bool_tint32_t clnttcp_control(CLIENT *, u_int, void *);
69static void clnttcp_destroy(CLIENT *);
70
71static const struct clnt_ops tcp_ops = {
72 clnttcp_call,
73 clnttcp_abort,
74 clnttcp_geterr,
75 clnttcp_freeres,
76 clnttcp_destroy,
77 clnttcp_control
78};
79
80struct ct_data {
81 int ct_sock;
82 bool_tint32_t ct_closeit;
83 int ct_connected; /* pre-connected */
84 struct timeval ct_wait;
85 bool_tint32_t ct_waitset; /* wait set by clnt_control? */
86 struct sockaddr_in ct_addr;
87 struct rpc_err ct_error;
88 char ct_mcall[MCALL_MSG_SIZE24]; /* marshalled callmsg */
89 u_int ct_mpos; /* pos after marshal */
90 XDR ct_xdrs;
91};
92
93static int readtcp(struct ct_data *, caddr_t, int);
94static int writetcp(struct ct_data *, caddr_t, int);
95
96/*
97 * Create a client handle for a tcp/ip connection.
98 * If *sockp<0, *sockp is set to a newly created TCP socket and it is
99 * connected to raddr. If *sockp non-negative then
100 * raddr is ignored. The rpc/tcp package does buffering
101 * similar to stdio, so the client must pick send and receive buffer sizes,];
102 * 0 => use the default.
103 * If raddr->sin_port is 0, then a binder on the remote machine is
104 * consulted for the right port number.
105 * NB: *sockp is copied into a private area.
106 * NB: It is the client's responsibility to close *sockp, unless
107 * clnttcp_create() was called with *sockp = -1 (so it created
108 * the socket), and CLNT_DESTROY() is used.
109 * NB: The rpch->cl_auth is set null authentication. Caller may wish to set this
110 * something more useful.
111 */
112CLIENT *
113clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
114 u_int sendsz, u_int recvsz)
115{
116 CLIENT *h;
117 struct ct_data *ct = NULL((void *)0);
118 struct rpc_msg call_msg;
119
120 h = (CLIENT *)mem_alloc(sizeof(*h))malloc(sizeof(*h));
121 if (h == NULL((void *)0)) {
122 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
123 rpc_createerr.cf_error.re_errnoru.RE_errno = errno(*__errno());
124 goto fooy;
125 }
126 ct = (struct ct_data *)mem_alloc(sizeof(*ct))malloc(sizeof(*ct));
127 if (ct == NULL((void *)0)) {
128 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
129 rpc_createerr.cf_error.re_errnoru.RE_errno = errno(*__errno());
130 goto fooy;
131 }
132
133 /*
134 * If no port number given ask the pmap for one
135 */
136 if (raddr->sin_port == 0) {
137 u_short port;
138 if ((port = pmap_getport(raddr, prog, vers, IPPROTO_TCP6)) == 0) {
139 mem_free((caddr_t)ct, sizeof(struct ct_data))free((caddr_t)ct);
140 mem_free((caddr_t)h, sizeof(CLIENT))free((caddr_t)h);
141 return (NULL((void *)0));
142 }
143 raddr->sin_port = htons(port)(__uint16_t)(__builtin_constant_p(port) ? (__uint16_t)(((__uint16_t
)(port) & 0xffU) << 8 | ((__uint16_t)(port) & 0xff00U
) >> 8) : __swap16md(port));
144 }
145
146 /*
147 * If no socket given, open one
148 */
149 if (*sockp < 0) {
150 *sockp = socket(AF_INET2, SOCK_STREAM1, IPPROTO_TCP6);
151 (void)bindresvport(*sockp, NULL((void *)0));
152 if ((*sockp == -1)
153 || (connect(*sockp, (struct sockaddr *)raddr,
154 sizeof(*raddr)) == -1)) {
155 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
156 rpc_createerr.cf_error.re_errnoru.RE_errno = errno(*__errno());
157 if (*sockp != -1)
158 (void)close(*sockp);
159 goto fooy;
160 }
161 ct->ct_closeit = TRUE(1);
162 } else {
163 ct->ct_closeit = FALSE(0);
164 }
165
166 /*
167 * Set up private data struct
168 */
169 ct->ct_sock = *sockp;
170 ct->ct_wait.tv_usec = 0;
171 ct->ct_waitset = FALSE(0);
172 ct->ct_addr = *raddr;
173
174 /*
175 * Initialize call message
176 */
177 call_msg.rm_xid = arc4random();
178 call_msg.rm_direction = CALL;
179 call_msg.rm_callru.RM_cmb.cb_rpcvers = RPC_MSG_VERSION((unsigned long) 2);
180 call_msg.rm_callru.RM_cmb.cb_prog = prog;
181 call_msg.rm_callru.RM_cmb.cb_vers = vers;
182
183 /*
184 * pre-serialize the static part of the call msg and stash it away
185 */
186 xdrmem_create(&(ct->ct_xdrs), ct->ct_mcall, MCALL_MSG_SIZE24,
187 XDR_ENCODE);
188 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
189 if (ct->ct_closeit) {
190 (void)close(*sockp);
191 }
192 goto fooy;
193 }
194 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs))(*(&(ct->ct_xdrs))->x_ops->x_getpostn)(&(ct->
ct_xdrs));
195 XDR_DESTROY(&(ct->ct_xdrs))if ((&(ct->ct_xdrs))->x_ops->x_destroy) (*(&
(ct->ct_xdrs))->x_ops->x_destroy)(&(ct->ct_xdrs
));
196
197 /*
198 * Create a client handle which uses xdrrec for serialization
199 * and authnone for authentication.
200 */
201 xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
202 (caddr_t)ct, (int(*)(caddr_t, caddr_t, int))readtcp,
203 (int(*)(caddr_t, caddr_t, int))writetcp);
204 h->cl_ops = &tcp_ops;
205 h->cl_private = (caddr_t) ct;
206 h->cl_auth = authnone_create();
207 if (h->cl_auth == NULL((void *)0)) {
208 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
209 rpc_createerr.cf_error.re_errnoru.RE_errno = errno(*__errno());
210 goto fooy;
211 }
212 return (h);
213
214fooy:
215 /*
216 * Something goofed, free stuff and barf
217 */
218 if (ct)
219 mem_free((caddr_t)ct, sizeof(struct ct_data))free((caddr_t)ct);
220 if (h)
221 mem_free((caddr_t)h, sizeof(CLIENT))free((caddr_t)h);
222 return (NULL((void *)0));
223}
224DEF_WEAK(clnttcp_create)__asm__(".weak " "clnttcp_create" " ; " "clnttcp_create" " = "
"_libc_clnttcp_create");
225
226static enum clnt_stat
227clnttcp_call(CLIENT *h, u_long proc, xdrproc_t xdr_args, caddr_t args_ptr,
228 xdrproc_t xdr_results, caddr_t results_ptr, struct timeval timeout)
229{
230 struct ct_data *ct = (struct ct_data *) h->cl_private;
231 XDR *xdrs = &(ct->ct_xdrs);
232 struct rpc_msg reply_msg;
233 u_long x_id;
234 u_int32_t *msg_x_id = (u_int32_t *)(ct->ct_mcall); /* yuk */
235 bool_tint32_t shipnow;
236 int refreshes = 2;
237
238 if (!ct->ct_waitset) {
1
Assuming field 'ct_waitset' is not equal to 0
→
239 ct->ct_wait = timeout;
240 }
241
242 shipnow =
243 (xdr_results == NULL((void *)0) && timeout.tv_sec == 0
2
←
Assuming 'xdr_results' is equal to NULL
→
3
←
Assuming field 'tv_sec' is not equal to 0
→
244 && timeout.tv_usec == 0) ? FALSE(0) : TRUE(1);
245
246call_again:
247 xdrs->x_op = XDR_ENCODE;
248 ct->ct_error.re_status = RPC_SUCCESS;
249 x_id = ntohl(--(*msg_x_id))(__uint32_t)(__builtin_constant_p(--(*msg_x_id)) ? (__uint32_t
)(((__uint32_t)(--(*msg_x_id)) & 0xff) << 24 | ((__uint32_t
)(--(*msg_x_id)) & 0xff00) << 8 | ((__uint32_t)(--(
*msg_x_id)) & 0xff0000) >> 8 | ((__uint32_t)(--(*msg_x_id
)) & 0xff000000) >> 24) : __swap32md(--(*msg_x_id))
);
4
←
'?' condition is false
→
250 if ((! XDR_PUTBYTES(xdrs, ct->ct_mcall, ct->ct_mpos)(*(xdrs)->x_ops->x_putbytes)(xdrs, ct->ct_mcall, ct->
ct_mpos)) ||
5
←
Assuming the condition is false
→
9
←
Taking false branch
→
251 (! XDR_PUTLONG(xdrs, (long *)&proc)(*(xdrs)->x_ops->x_putlong)(xdrs, (long *)&proc)) ||
6
←
Assuming the condition is false
→
252 (! AUTH_MARSHALL(h->cl_auth, xdrs)((*((h->cl_auth)->ah_ops->ah_marshal))(h->cl_auth
, xdrs))) ||
7
←
Assuming the condition is false
→
253 (! (*xdr_args)(xdrs, args_ptr))) {
8
←
Assuming the condition is false
→
254 if (ct->ct_error.re_status == RPC_SUCCESS)
255 ct->ct_error.re_status = RPC_CANTENCODEARGS;
256 (void)xdrrec_endofrecord(xdrs, TRUE(1));
257 return (ct->ct_error.re_status);
258 }
259 if (! xdrrec_endofrecord(xdrs, shipnow))
10
←
Assuming the condition is false
→
11
←
Taking false branch
→
260 return (ct->ct_error.re_status = RPC_CANTSEND);
261 if (! shipnow
11.1
'shipnow' is 1
)
262 return (RPC_SUCCESS);
263 /*
264 * Hack to provide rpc-based message passing
265 */
266 if (timeout.tv_sec
11.2
Field 'tv_sec' is not equal to 0
 == 0 && timeout.tv_usec == 0) {
267 return(ct->ct_error.re_status = RPC_TIMEDOUT);
268 }
269
270
271 /*
272 * Keep receiving until we get a valid transaction id
273 */
274 xdrs->x_op = XDR_DECODE;
275 while (TRUE(1)) {
12
←
Loop condition is true. Entering loop body
→
276 reply_msg.acpted_rplyru.RM_rmb.ru.RP_ar.ar_verf = _null_auth;
277 reply_msg.acpted_rplyru.RM_rmb.ru.RP_ar.ar_resultsru.AR_results.where = NULL((void *)0);
278 reply_msg.acpted_rplyru.RM_rmb.ru.RP_ar.ar_resultsru.AR_results.proc = xdr_void;
279 if (! xdrrec_skiprecord(xdrs))
13
←
Assuming the condition is false
→
14
←
Taking false branch
→
280 return (ct->ct_error.re_status);
281 /* now decode and validate the response header */
282 if (! xdr_replymsg(xdrs, &reply_msg)) {
15
←
Assuming the condition is false
→
16
←
Taking false branch
→
283 if (ct->ct_error.re_status == RPC_SUCCESS)
284 continue;
285 return (ct->ct_error.re_status);
286 }
287 if (reply_msg.rm_xid == x_id)
17
←
Assuming 'x_id' is equal to field 'rm_xid'
→
18
←
Taking true branch
→
288 break;
289 }
290
291 /*
292 * process header
293 */
294 _seterr_reply(&reply_msg, &(ct->ct_error));
295 if (ct->ct_error.re_status == RPC_SUCCESS) {
19
←
Assuming field 're_status' is equal to RPC_SUCCESS
→
20
←
Taking true branch
→
296 if (! AUTH_VALIDATE(h->cl_auth, &reply_msg.acpted_rply.ar_verf)((*((h->cl_auth)->ah_ops->ah_validate))((h->cl_auth
), &reply_msg.ru.RM_rmb.ru.RP_ar.ar_verf))) {
21
←
Assuming the condition is false
→
22
←
Taking false branch
→
297 ct->ct_error.re_status = RPC_AUTHERROR;
298 ct->ct_error.re_whyru.RE_why = AUTH_INVALIDRESP;
299 } else if (! (*xdr_results)(xdrs, results_ptr)) {
23
←
Called function pointer is null (null dereference)
300 if (ct->ct_error.re_status == RPC_SUCCESS)
301 ct->ct_error.re_status = RPC_CANTDECODERES;
302 }
303 /* free verifier ... */
304 if (reply_msg.acpted_rplyru.RM_rmb.ru.RP_ar.ar_verf.oa_base != NULL((void *)0)) {
305 xdrs->x_op = XDR_FREE;
306 (void)xdr_opaque_auth(xdrs, &(reply_msg.acpted_rplyru.RM_rmb.ru.RP_ar.ar_verf));
307 }
308 } /* end successful completion */
309 else {
310 /* maybe our credentials need to be refreshed ... */
311 if (refreshes-- && AUTH_REFRESH(h->cl_auth)((*((h->cl_auth)->ah_ops->ah_refresh))(h->cl_auth
)))
312 goto call_again;
313 } /* end of unsuccessful completion */
314 return (ct->ct_error.re_status);
315}
316
317static void
318clnttcp_geterr(CLIENT *h, struct rpc_err *errp)
319{
320 struct ct_data *ct =
321 (struct ct_data *) h->cl_private;
322
323 *errp = ct->ct_error;
324}
325
326static bool_tint32_t
327clnttcp_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
328{
329 struct ct_data *ct = (struct ct_data *)cl->cl_private;
330 XDR *xdrs = &(ct->ct_xdrs);
331
332 xdrs->x_op = XDR_FREE;
333 return ((*xdr_res)(xdrs, res_ptr));
334}
335
336static void
337clnttcp_abort(CLIENT *clnt)
338{
339}
340
341static bool_tint32_t
342clnttcp_control(CLIENT *cl, u_int request, void *info)
343{
344 struct ct_data *ct = (struct ct_data *)cl->cl_private;
345
346 switch (request) {
347 case CLSET_TIMEOUT1:
348 ct->ct_wait = *(struct timeval *)info;
349 ct->ct_waitset = TRUE(1);
350 break;
351 case CLGET_TIMEOUT2:
352 *(struct timeval *)info = ct->ct_wait;
353 break;
354 case CLGET_SERVER_ADDR3:
355 *(struct sockaddr_in *)info = ct->ct_addr;
356 break;
357 case CLSET_CONNECTED6:
358 ct->ct_connected = *(int *)info;
359 break;
360 default:
361 return (FALSE(0));
362 }
363 return (TRUE(1));
364}
365
366
367static void
368clnttcp_destroy(CLIENT *h)
369{
370 struct ct_data *ct =
371 (struct ct_data *) h->cl_private;
372
373 if (ct->ct_closeit && ct->ct_sock != -1) {
374 (void)close(ct->ct_sock);
375 }
376 XDR_DESTROY(&(ct->ct_xdrs))if ((&(ct->ct_xdrs))->x_ops->x_destroy) (*(&
(ct->ct_xdrs))->x_ops->x_destroy)(&(ct->ct_xdrs
));
377 mem_free((caddr_t)ct, sizeof(struct ct_data))free((caddr_t)ct);
378 mem_free((caddr_t)h, sizeof(CLIENT))free((caddr_t)h);
379}
380
381/*
382 * Interface between xdr serializer and tcp connection.
383 * Behaves like the system calls, read & write, but keeps some error state
384 * around for the rpc level.
385 */
386static int
387readtcp(struct ct_data *ct, caddr_t buf, int len)
388{
389 struct pollfd pfd[1];
390 struct timespec start, after, duration, delta, wait;
391 int r, save_errno;
392
393 if (len == 0)
394 return (0);
395
396 pfd[0].fd = ct->ct_sock;
397 pfd[0].events = POLLIN0x0001;
398 TIMEVAL_TO_TIMESPEC(&ct->ct_wait, &wait)do { (&wait)->tv_sec = (&ct->ct_wait)->tv_sec
; (&wait)->tv_nsec = (&ct->ct_wait)->tv_usec
* 1000; } while (0);
399 delta = wait;
400 WRAP(clock_gettime)_libc_clock_gettime_wrap(CLOCK_MONOTONIC3, &start);
401 for (;;) {
402 r = ppoll(pfd, 1, &delta, NULL((void *)0));
403 save_errno = errno(*__errno());
404
405 WRAP(clock_gettime)_libc_clock_gettime_wrap(CLOCK_MONOTONIC3, &after);
406 timespecsub(&start, &after, &duration)do { (&duration)->tv_sec = (&start)->tv_sec - (
&after)->tv_sec; (&duration)->tv_nsec = (&start
)->tv_nsec - (&after)->tv_nsec; if ((&duration)
->tv_nsec < 0) { (&duration)->tv_sec--; (&duration
)->tv_nsec += 1000000000L; } } while (0);
407 timespecsub(&wait, &duration, &delta)do { (&delta)->tv_sec = (&wait)->tv_sec - (&
duration)->tv_sec; (&delta)->tv_nsec = (&wait)->
tv_nsec - (&duration)->tv_nsec; if ((&delta)->tv_nsec
< 0) { (&delta)->tv_sec--; (&delta)->tv_nsec
+= 1000000000L; } } while (0);
408 if (delta.tv_sec < 0 || !timespecisset(&delta)((&delta)->tv_sec || (&delta)->tv_nsec))
409 r = 0;
410
411 switch (r) {
412 case 0:
413 ct->ct_error.re_status = RPC_TIMEDOUT;
414 return (-1);
415 case 1:
416 if (pfd[0].revents & POLLNVAL0x0020)
417 errno(*__errno()) = EBADF9;
418 else if (pfd[0].revents & POLLERR0x0008)
419 errno(*__errno()) = EIO5;
420 else
421 break;
422 /* FALLTHROUGH */
423 case -1:
424 if (errno(*__errno()) == EINTR4)
425 continue;
426 ct->ct_error.re_status = RPC_CANTRECV;
427 ct->ct_error.re_errnoru.RE_errno = save_errno;
428 return (-1);
429 }
430 break;
431 }
432
433 switch (len = read(ct->ct_sock, buf, len)) {
434 case 0:
435 /* premature eof */
436 ct->ct_error.re_errnoru.RE_errno = ECONNRESET54;
437 ct->ct_error.re_status = RPC_CANTRECV;
438 len = -1; /* it's really an error */
439 break;
440 case -1:
441 ct->ct_error.re_errnoru.RE_errno = errno(*__errno());
442 ct->ct_error.re_status = RPC_CANTRECV;
443 break;
444 }
445 return (len);
446}
447
448static int
449writetcp(struct ct_data *ct, caddr_t buf, int len)
450{
451 int i, cnt;
452
453 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
454 if ((i = write(ct->ct_sock, buf, cnt)) == -1) {
455 ct->ct_error.re_errnoru.RE_errno = errno(*__errno());
456 ct->ct_error.re_status = RPC_CANTSEND;
457 return (-1);
458 }
459 }
460 return (len);
461}