Bug Summary

File:src/usr.bin/nc/netcat.c
Warning:line 693, column 9
Passed-by-value struct argument contains uninitialized data (e.g., field: 'ai_flags')

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name netcat.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -fno-rounding-math -mconstructor-aliases -munwind-tables -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/usr.bin/nc/obj -resource-dir /usr/local/lib/clang/13.0.0 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.bin/nc/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -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/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.bin/nc/netcat.c
1/* $OpenBSD: netcat.c,v 1.218 2021/07/12 15:09:20 beck Exp $ */
2/*
3 * Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
4 * Copyright (c) 2015 Bob Beck. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/*
31 * Re-written nc(1) for OpenBSD. Original implementation by
32 * *Hobbit* <hobbit@avian.org>.
33 */
34
35#include <sys/types.h>
36#include <sys/socket.h>
37#include <sys/uio.h>
38#include <sys/un.h>
39
40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
43#include <arpa/telnet.h>
44
45#include <ctype.h>
46#include <err.h>
47#include <errno(*__errno()).h>
48#include <limits.h>
49#include <netdb.h>
50#include <poll.h>
51#include <signal.h>
52#include <stdarg.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <time.h>
57#include <tls.h>
58#include <unistd.h>
59
60#include "atomicio.h"
61
62#define PORT_MAX65535 65535
63#define UNIX_DG_TMP_SOCKET_SIZE19 19
64
65#define POLL_STDIN0 0
66#define POLL_NETOUT1 1
67#define POLL_NETIN2 2
68#define POLL_STDOUT3 3
69#define BUFSIZE16384 16384
70
71#define TLS_NOVERIFY(1 << 1) (1 << 1)
72#define TLS_NONAME(1 << 2) (1 << 2)
73#define TLS_CCERT(1 << 3) (1 << 3)
74#define TLS_MUSTSTAPLE(1 << 4) (1 << 4)
75
76/* Command Line Options */
77int dflag; /* detached, no stdin */
78int Fflag; /* fdpass sock to stdout */
79unsigned int iflag; /* Interval Flag */
80int kflag; /* More than one connect */
81int lflag; /* Bind to local port */
82int Nflag; /* shutdown() network socket */
83int nflag; /* Don't do name look up */
84char *Pflag; /* Proxy username */
85char *pflag; /* Localport flag */
86int rflag; /* Random ports flag */
87char *sflag; /* Source Address */
88int tflag; /* Telnet Emulation */
89int uflag; /* UDP - Default to TCP */
90int vflag; /* Verbosity */
91int xflag; /* Socks proxy */
92int zflag; /* Port Scan Flag */
93int Dflag; /* sodebug */
94int Iflag; /* TCP receive buffer size */
95int Oflag; /* TCP send buffer size */
96int Sflag; /* TCP MD5 signature option */
97int Tflag = -1; /* IP Type of Service */
98int rtableid = -1;
99
100int usetls; /* use TLS */
101const char *Cflag; /* Public cert file */
102const char *Kflag; /* Private key file */
103const char *oflag; /* OCSP stapling file */
104const char *Rflag; /* Root CA file */
105int tls_cachanged; /* Using non-default CA file */
106int TLSopt; /* TLS options */
107char *tls_expectname; /* required name in peer cert */
108char *tls_expecthash; /* required hash of peer cert */
109char *tls_ciphers; /* TLS ciphers */
110char *tls_protocols; /* TLS protocols */
111FILE *Zflag; /* file to save peer cert */
112
113int recvcount, recvlimit;
114int timeout = -1;
115int family = AF_UNSPEC0;
116char *portlist[PORT_MAX65535+1];
117char *unix_dg_tmp_socket;
118int ttl = -1;
119int minttl = -1;
120
121void atelnet(int, unsigned char *, unsigned int);
122int strtoport(char *portstr, int udp);
123void build_ports(char *);
124void help(void) __attribute__((noreturn));
125int local_listen(const char *, const char *, struct addrinfo);
126void readwrite(int, struct tls *);
127void fdpass(int nfd) __attribute__((noreturn));
128int remote_connect(const char *, const char *, struct addrinfo, char *);
129int timeout_tls(int, struct tls *, int (*)(struct tls *));
130int timeout_connect(int, const struct sockaddr *, socklen_t);
131int socks_connect(const char *, const char *, struct addrinfo,
132 const char *, const char *, struct addrinfo, int, const char *);
133int udptest(int);
134int unix_bind(char *, int);
135int unix_connect(char *);
136int unix_listen(char *);
137void set_common_sockopts(int, int);
138int process_tos_opt(char *, int *);
139int process_tls_opt(char *, int *);
140void save_peer_cert(struct tls *_tls_ctx, FILE *_fp);
141void report_sock(const char *, const struct sockaddr *, socklen_t, char *);
142void report_tls(struct tls *tls_ctx, char * host);
143void usage(int);
144ssize_t drainbuf(int, unsigned char *, size_t *, struct tls *);
145ssize_t fillbuf(int, unsigned char *, size_t *, struct tls *);
146void tls_setup_client(struct tls *, int, char *);
147struct tls *tls_setup_server(struct tls *, int, char *);
148
149int
150main(int argc, char *argv[])
151{
152 int ch, s = -1, ret, socksv;
153 char *host, *uport;
154 char ipaddr[NI_MAXHOST256];
155 struct addrinfo hints;
156 struct servent *sv;
157 socklen_t len;
158 struct sockaddr_storage cliaddr;
159 char *proxy = NULL((void*)0), *proxyport = NULL((void*)0);
160 const char *errstr;
161 struct addrinfo proxyhints;
1
'proxyhints' initialized here
→
162 char unix_dg_tmp_socket_buf[UNIX_DG_TMP_SOCKET_SIZE19];
163 struct tls_config *tls_cfg = NULL((void*)0);
164 struct tls *tls_ctx = NULL((void*)0);
165 uint32_t protocols;
166
167 ret = 1;
168 socksv = 5;
169 host = NULL((void*)0);
170 uport = NULL((void*)0);
171 sv = NULL((void*)0);
172 Rflag = tls_default_ca_cert_file();
173
174 signal(SIGPIPE13, SIG_IGN(void (*)(int))1);
175
176 while ((ch = getopt(argc, argv,
2
←
Assuming the condition is false
→
3
←
Loop condition is false. Execution continues on line 347
→
177 "46C:cDde:FH:hI:i:K:klM:m:NnO:o:P:p:R:rSs:T:tUuV:vW:w:X:x:Z:z"))
178 != -1) {
179 switch (ch) {
180 case '4':
181 family = AF_INET2;
182 break;
183 case '6':
184 family = AF_INET624;
185 break;
186 case 'U':
187 family = AF_UNIX1;
188 break;
189 case 'X':
190 if (strcasecmp(optarg, "connect") == 0)
191 socksv = -1; /* HTTP proxy CONNECT */
192 else if (strcmp(optarg, "4") == 0)
193 socksv = 4; /* SOCKS v.4 */
194 else if (strcmp(optarg, "5") == 0)
195 socksv = 5; /* SOCKS v.5 */
196 else
197 errx(1, "unsupported proxy protocol");
198 break;
199 case 'C':
200 Cflag = optarg;
201 break;
202 case 'c':
203 usetls = 1;
204 break;
205 case 'd':
206 dflag = 1;
207 break;
208 case 'e':
209 tls_expectname = optarg;
210 break;
211 case 'F':
212 Fflag = 1;
213 break;
214 case 'H':
215 tls_expecthash = optarg;
216 break;
217 case 'h':
218 help();
219 break;
220 case 'i':
221 iflag = strtonum(optarg, 0, UINT_MAX(2147483647 *2U +1U), &errstr);
222 if (errstr)
223 errx(1, "interval %s: %s", errstr, optarg);
224 break;
225 case 'K':
226 Kflag = optarg;
227 break;
228 case 'k':
229 kflag = 1;
230 break;
231 case 'l':
232 lflag = 1;
233 break;
234 case 'M':
235 ttl = strtonum(optarg, 0, 255, &errstr);
236 if (errstr)
237 errx(1, "ttl is %s", errstr);
238 break;
239 case 'm':
240 minttl = strtonum(optarg, 0, 255, &errstr);
241 if (errstr)
242 errx(1, "minttl is %s", errstr);
243 break;
244 case 'N':
245 Nflag = 1;
246 break;
247 case 'n':
248 nflag = 1;
249 break;
250 case 'P':
251 Pflag = optarg;
252 break;
253 case 'p':
254 pflag = optarg;
255 break;
256 case 'R':
257 tls_cachanged = 1;
258 Rflag = optarg;
259 break;
260 case 'r':
261 rflag = 1;
262 break;
263 case 's':
264 sflag = optarg;
265 break;
266 case 't':
267 tflag = 1;
268 break;
269 case 'u':
270 uflag = 1;
271 break;
272 case 'V':
273 rtableid = (int)strtonum(optarg, 0,
274 RT_TABLEID_MAX255, &errstr);
275 if (errstr)
276 errx(1, "rtable %s: %s", errstr, optarg);
277 break;
278 case 'v':
279 vflag = 1;
280 break;
281 case 'W':
282 recvlimit = strtonum(optarg, 1, INT_MAX2147483647, &errstr);
283 if (errstr)
284 errx(1, "receive limit %s: %s", errstr, optarg);
285 break;
286 case 'w':
287 timeout = strtonum(optarg, 0, INT_MAX2147483647 / 1000, &errstr);
288 if (errstr)
289 errx(1, "timeout %s: %s", errstr, optarg);
290 timeout *= 1000;
291 break;
292 case 'x':
293 xflag = 1;
294 if ((proxy = strdup(optarg)) == NULL((void*)0))
295 err(1, NULL((void*)0));
296 break;
297 case 'Z':
298 if (strcmp(optarg, "-") == 0)
299 Zflag = stderr(&__sF[2]);
300 else if ((Zflag = fopen(optarg, "w")) == NULL((void*)0))
301 err(1, "can't open %s", optarg);
302 break;
303 case 'z':
304 zflag = 1;
305 break;
306 case 'D':
307 Dflag = 1;
308 break;
309 case 'I':
310 Iflag = strtonum(optarg, 1, 65536 << 14, &errstr);
311 if (errstr != NULL((void*)0))
312 errx(1, "TCP receive window %s: %s",
313 errstr, optarg);
314 break;
315 case 'O':
316 Oflag = strtonum(optarg, 1, 65536 << 14, &errstr);
317 if (errstr != NULL((void*)0))
318 errx(1, "TCP send window %s: %s",
319 errstr, optarg);
320 break;
321 case 'o':
322 oflag = optarg;
323 break;
324 case 'S':
325 Sflag = 1;
326 break;
327 case 'T':
328 errstr = NULL((void*)0);
329 errno(*__errno()) = 0;
330 if (process_tls_opt(optarg, &TLSopt))
331 break;
332 if (process_tos_opt(optarg, &Tflag))
333 break;
334 if (strlen(optarg) > 1 && optarg[0] == '0' &&
335 optarg[1] == 'x')
336 Tflag = (int)strtol(optarg, NULL((void*)0), 16);
337 else
338 Tflag = (int)strtonum(optarg, 0, 255,
339 &errstr);
340 if (Tflag < 0 || Tflag > 255 || errstr || errno(*__errno()))
341 errx(1, "illegal tos/tls value %s", optarg);
342 break;
343 default:
344 usage(1);
345 }
346 }
347 argc -= optind;
348 argv += optind;
349
350 if (rtableid
3.1
'rtableid' is < 0
 >= 0)
4
←
Taking false branch
→
351 if (setrtable(rtableid) == -1)
352 err(1, "setrtable");
353
354 /* Cruft to make sure options are clean, and used properly. */
355 if (argc == 1 && family == AF_UNIX1) {
5
←
Assuming 'argc' is not equal to 1
→
356 host = argv[0];
357 } else if (argc
5.1
'argc' is not equal to 1
 == 1 && lflag) {
358 uport = argv[0];
359 } else if (argc == 2) {
6
←
Assuming 'argc' is equal to 2
→
7
←
Taking true branch
→
360 host = argv[0];
361 uport = argv[1];
362 } else
363 usage(1);
364
365 if (usetls) {
8
←
Assuming 'usetls' is 0
→
9
←
Taking false branch
→
366 if (Cflag && unveil(Cflag, "r") == -1)
367 err(1, "unveil %s", Cflag);
368 if (unveil(Rflag, "r") == -1)
369 err(1, "unveil %s", Rflag);
370 if (Kflag && unveil(Kflag, "r") == -1)
371 err(1, "unveil %s", Kflag);
372 if (oflag && unveil(oflag, "r") == -1)
373 err(1, "unveil %s", oflag);
374 } else if (family
9.1
'family' is not equal to AF_UNIX
 == AF_UNIX1 && uflag && lflag && !kflag) {
375 /*
376 * After recvfrom(2) from client, the server connects
377 * to the client socket. As the client path is determined
378 * during runtime, we cannot unveil(2).
379 */
380 } else {
381 if (family
9.2
'family' is not equal to AF_UNIX
 == AF_UNIX1) {
10
←
Taking false branch
→
382 if (unveil(host, "rwc") == -1)
383 err(1, "unveil %s", host);
384 if (uflag && !kflag) {
385 if (sflag) {
386 if (unveil(sflag, "rwc") == -1)
387 err(1, "unveil %s", sflag);
388 } else {
389 if (unveil("/tmp", "rwc") == -1)
390 err(1, "unveil /tmp");
391 }
392 }
393 } else {
394 /* no filesystem visibility */
395 if (unveil("/", "") == -1)
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
396 err(1, "unveil /");
397 }
398 }
399
400 if (family
12.1
'family' is not equal to AF_UNIX
 == AF_UNIX1) {
13
←
Taking false branch
→
401 if (pledge("stdio rpath wpath cpath tmppath unix", NULL((void*)0)) == -1)
402 err(1, "pledge");
403 } else if (Fflag && Pflag) {
14
←
Assuming 'Fflag' is not equal to 0
→
15
←
Assuming 'Pflag' is non-null
→
16
←
Taking true branch
→
404 if (pledge("stdio inet dns sendfd tty", NULL((void*)0)) == -1)
17
←
Assuming the condition is false
→
18
←
Taking false branch
→
405 err(1, "pledge");
406 } else if (Fflag) {
407 if (pledge("stdio inet dns sendfd", NULL((void*)0)) == -1)
408 err(1, "pledge");
409 } else if (Pflag && usetls) {
410 if (pledge("stdio rpath inet dns tty", NULL((void*)0)) == -1)
411 err(1, "pledge");
412 } else if (Pflag) {
413 if (pledge("stdio inet dns tty", NULL((void*)0)) == -1)
414 err(1, "pledge");
415 } else if (usetls) {
416 if (pledge("stdio rpath inet dns", NULL((void*)0)) == -1)
417 err(1, "pledge");
418 } else if (pledge("stdio inet dns", NULL((void*)0)) == -1)
419 err(1, "pledge");
420
421 if (lflag && sflag)
19
←
Assuming 'lflag' is 0
→
422 errx(1, "cannot use -s and -l");
423 if (lflag
19.1
'lflag' is 0
 && pflag)
424 errx(1, "cannot use -p and -l");
425 if (lflag
19.2
'lflag' is 0
 && zflag)
426 errx(1, "cannot use -z and -l");
427 if (!lflag
19.3
'lflag' is 0
 && kflag)
20
←
Assuming 'kflag' is 0
→
21
←
Taking false branch
→
428 errx(1, "must use -l with -k");
429 if (uflag && usetls)
22
←
Assuming 'uflag' is 0
→
430 errx(1, "cannot use -c and -u");
431 if ((family
22.1
'family' is not equal to AF_UNIX
 == AF_UNIX1) && usetls)
432 errx(1, "cannot use -c and -U");
433 if ((family
22.2
'family' is not equal to AF_UNIX
 == AF_UNIX1) && Fflag)
434 errx(1, "cannot use -F and -U");
435 if (Fflag
22.3
'Fflag' is not equal to 0
 && usetls
22.4
'usetls' is 0
)
23
←
Taking false branch
→
436 errx(1, "cannot use -c and -F");
437 if (TLSopt && !usetls)
24
←
Assuming 'TLSopt' is 0
→
438 errx(1, "you must specify -c to use TLS options");
439 if (Cflag && !usetls)
25
←
Assuming 'Cflag' is null
→
440 errx(1, "you must specify -c to use -C");
441 if (Kflag && !usetls)
26
←
Assuming 'Kflag' is null
→
442 errx(1, "you must specify -c to use -K");
443 if (Zflag && !usetls)
27
←
Assuming 'Zflag' is null
→
444 errx(1, "you must specify -c to use -Z");
445 if (oflag && !Cflag)
28
←
Assuming 'oflag' is null
→
446 errx(1, "you must specify -C to use -o");
447 if (tls_cachanged && !usetls)
29
←
Assuming 'tls_cachanged' is 0
→
448 errx(1, "you must specify -c to use -R");
449 if (tls_expecthash && !usetls)
30
←
Assuming 'tls_expecthash' is null
→
450 errx(1, "you must specify -c to use -H");
451 if (tls_expectname && !usetls)
31
←
Assuming 'tls_expectname' is null
→
452 errx(1, "you must specify -c to use -e");
453
454 /* Get name of temporary socket for unix datagram client */
455 if ((family
31.1
'family' is not equal to AF_UNIX
 == AF_UNIX1) && uflag && !lflag) {
456 if (sflag) {
457 unix_dg_tmp_socket = sflag;
458 } else {
459 strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",
460 UNIX_DG_TMP_SOCKET_SIZE19);
461 if (mktemp(unix_dg_tmp_socket_buf) == NULL((void*)0))
462 err(1, "mktemp");
463 unix_dg_tmp_socket = unix_dg_tmp_socket_buf;
464 }
465 }
466
467 /* Initialize addrinfo structure. */
468 if (family
31.2
'family' is not equal to AF_UNIX
 != AF_UNIX1) {
32
←
Taking true branch
→
469 memset(&hints, 0, sizeof(struct addrinfo));
470 hints.ai_family = family;
471 hints.ai_socktype = uflag
32.1
'uflag' is 0
 ? SOCK_DGRAM2 : SOCK_STREAM1;
33
←
'?' condition is false
→
472 hints.ai_protocol = uflag
33.1
'uflag' is 0
 ? IPPROTO_UDP17 : IPPROTO_TCP6;
34
←
'?' condition is false
→
473 if (nflag)
35
←
Assuming 'nflag' is 0
→
36
←
Taking false branch
→
474 hints.ai_flags |= AI_NUMERICHOST4;
475 }
476
477 if (xflag) {
37
←
Assuming 'xflag' is 0
→
38
←
Taking false branch
→
478 if (uflag)
479 errx(1, "no proxy support for UDP mode");
480
481 if (lflag)
482 errx(1, "no proxy support for listen");
483
484 if (family == AF_UNIX1)
485 errx(1, "no proxy support for unix sockets");
486
487 if (sflag)
488 errx(1, "no proxy support for local source address");
489
490 if (*proxy == '[') {
491 ++proxy;
492 proxyport = strchr(proxy, ']');
493 if (proxyport == NULL((void*)0))
494 errx(1, "missing closing bracket in proxy");
495 *proxyport++ = '\0';
496 if (*proxyport == '\0')
497 /* Use default proxy port. */
498 proxyport = NULL((void*)0);
499 else {
500 if (*proxyport == ':')
501 ++proxyport;
502 else
503 errx(1, "garbage proxy port delimiter");
504 }
505 } else {
506 proxyport = strrchr(proxy, ':');
507 if (proxyport != NULL((void*)0))
508 *proxyport++ = '\0';
509 }
510
511 memset(&proxyhints, 0, sizeof(struct addrinfo));
512 proxyhints.ai_family = family;
513 proxyhints.ai_socktype = SOCK_STREAM1;
514 proxyhints.ai_protocol = IPPROTO_TCP6;
515 if (nflag)
516 proxyhints.ai_flags |= AI_NUMERICHOST4;
517 }
518
519 if (usetls
38.1
'usetls' is 0
) {
39
←
Taking false branch
→
520 if ((tls_cfg = tls_config_new()) == NULL((void*)0))
521 errx(1, "unable to allocate TLS config");
522 if (Rflag && tls_config_set_ca_file(tls_cfg, Rflag) == -1)
523 errx(1, "%s", tls_config_error(tls_cfg));
524 if (Cflag && tls_config_set_cert_file(tls_cfg, Cflag) == -1)
525 errx(1, "%s", tls_config_error(tls_cfg));
526 if (Kflag && tls_config_set_key_file(tls_cfg, Kflag) == -1)
527 errx(1, "%s", tls_config_error(tls_cfg));
528 if (oflag && tls_config_set_ocsp_staple_file(tls_cfg, oflag) == -1)
529 errx(1, "%s", tls_config_error(tls_cfg));
530 if (tls_config_parse_protocols(&protocols, tls_protocols) == -1)
531 errx(1, "invalid TLS protocols `%s'", tls_protocols);
532 if (tls_config_set_protocols(tls_cfg, protocols) == -1)
533 errx(1, "%s", tls_config_error(tls_cfg));
534 if (tls_config_set_ciphers(tls_cfg, tls_ciphers) == -1)
535 errx(1, "%s", tls_config_error(tls_cfg));
536 if (!lflag && (TLSopt & TLS_CCERT(1 << 3)))
537 errx(1, "clientcert is only valid with -l");
538 if (TLSopt & TLS_NONAME(1 << 2))
539 tls_config_insecure_noverifyname(tls_cfg);
540 if (TLSopt & TLS_NOVERIFY(1 << 1)) {
541 if (tls_expecthash != NULL((void*)0))
542 errx(1, "-H and -T noverify may not be used "
543 "together");
544 tls_config_insecure_noverifycert(tls_cfg);
545 }
546 if (TLSopt & TLS_MUSTSTAPLE(1 << 4))
547 tls_config_ocsp_require_stapling(tls_cfg);
548
549 if (Pflag) {
550 if (pledge("stdio inet dns tty", NULL((void*)0)) == -1)
551 err(1, "pledge");
552 } else if (pledge("stdio inet dns", NULL((void*)0)) == -1)
553 err(1, "pledge");
554 }
555 if (lflag
39.1
'lflag' is 0
) {
40
←
Taking false branch
→
556 ret = 0;
557
558 if (family == AF_UNIX1) {
559 if (uflag)
560 s = unix_bind(host, 0);
561 else
562 s = unix_listen(host);
563 }
564
565 if (usetls) {
566 tls_config_verify_client_optional(tls_cfg);
567 if ((tls_ctx = tls_server()) == NULL((void*)0))
568 errx(1, "tls server creation failed");
569 if (tls_configure(tls_ctx, tls_cfg) == -1)
570 errx(1, "tls configuration failed (%s)",
571 tls_error(tls_ctx));
572 }
573 /* Allow only one connection at a time, but stay alive. */
574 for (;;) {
575 if (family != AF_UNIX1) {
576 if (s != -1)
577 close(s);
578 s = local_listen(host, uport, hints);
579 }
580 if (s == -1)
581 err(1, NULL((void*)0));
582 if (uflag && kflag) {
583 if (family == AF_UNIX1) {
584 if (pledge("stdio unix", NULL((void*)0)) == -1)
585 err(1, "pledge");
586 }
587 /*
588 * For UDP and -k, don't connect the socket,
589 * let it receive datagrams from multiple
590 * socket pairs.
591 */
592 readwrite(s, NULL((void*)0));
593 } else if (uflag && !kflag) {
594 /*
595 * For UDP and not -k, we will use recvfrom()
596 * initially to wait for a caller, then use
597 * the regular functions to talk to the caller.
598 */
599 int rv;
600 char buf[2048];
601 struct sockaddr_storage z;
602
603 len = sizeof(z);
604 rv = recvfrom(s, buf, sizeof(buf), MSG_PEEK0x2,
605 (struct sockaddr *)&z, &len);
606 if (rv == -1)
607 err(1, "recvfrom");
608
609 rv = connect(s, (struct sockaddr *)&z, len);
610 if (rv == -1)
611 err(1, "connect");
612
613 if (family == AF_UNIX1) {
614 if (pledge("stdio unix", NULL((void*)0)) == -1)
615 err(1, "pledge");
616 }
617 if (vflag)
618 report_sock("Connection received",
619 (struct sockaddr *)&z, len,
620 family == AF_UNIX1 ? host : NULL((void*)0));
621
622 readwrite(s, NULL((void*)0));
623 } else {
624 struct tls *tls_cctx = NULL((void*)0);
625 int connfd;
626
627 len = sizeof(cliaddr);
628 connfd = accept4(s, (struct sockaddr *)&cliaddr,
629 &len, SOCK_NONBLOCK0x4000);
630 if (connfd == -1) {
631 /* For now, all errnos are fatal */
632 err(1, "accept");
633 }
634 if (vflag)
635 report_sock("Connection received",
636 (struct sockaddr *)&cliaddr, len,
637 family == AF_UNIX1 ? host : NULL((void*)0));
638 if ((usetls) &&
639 (tls_cctx = tls_setup_server(tls_ctx, connfd, host)))
640 readwrite(connfd, tls_cctx);
641 if (!usetls)
642 readwrite(connfd, NULL((void*)0));
643 if (tls_cctx)
644 timeout_tls(s, tls_cctx, tls_close);
645 close(connfd);
646 tls_free(tls_cctx);
647 }
648 if (family == AF_UNIX1 && uflag) {
649 if (connect(s, NULL((void*)0), 0) == -1)
650 err(1, "connect");
651 }
652
653 if (!kflag)
654 break;
655 }
656 } else if (family == AF_UNIX1) {
41
←
Assuming 'family' is not equal to AF_UNIX
→
42
←
Taking false branch
→
657 ret = 0;
658
659 if ((s = unix_connect(host)) > 0) {
660 if (!zflag)
661 readwrite(s, NULL((void*)0));
662 close(s);
663 } else {
664 warn("%s", host);
665 ret = 1;
666 }
667
668 if (uflag)
669 unlink(unix_dg_tmp_socket);
670 return ret;
671
672 } else {
673 int i = 0;
674
675 /* Construct the portlist[] array. */
676 build_ports(uport);
677
678 /* Cycle through portlist, connecting to each port. */
679 for (s = -1, i = 0; portlist[i] != NULL((void*)0); i++) {
43
←
Assuming the condition is true
→
44
←
Loop condition is true. Entering loop body
→
680 if (s != -1)
45
←
Taking false branch
→
681 close(s);
682 tls_free(tls_ctx);
683 tls_ctx = NULL((void*)0);
684
685 if (usetls) {
46
←
Assuming 'usetls' is 0
→
47
←
Taking false branch
→
686 if ((tls_ctx = tls_client()) == NULL((void*)0))
687 errx(1, "tls client creation failed");
688 if (tls_configure(tls_ctx, tls_cfg) == -1)
689 errx(1, "tls configuration failed (%s)",
690 tls_error(tls_ctx));
691 }
692 if (xflag)
48
←
Assuming 'xflag' is not equal to 0
→
49
←
Taking true branch
→
693 s = socks_connect(host, portlist[i], hints,
50
←
Passed-by-value struct argument contains uninitialized data (e.g., field: 'ai_flags')
694 proxy, proxyport, proxyhints, socksv,
695 Pflag);
696 else
697 s = remote_connect(host, portlist[i], hints,
698 ipaddr);
699
700 if (s == -1)
701 continue;
702
703 ret = 0;
704 if (vflag || zflag) {
705 /* For UDP, make sure we are connected. */
706 if (uflag) {
707 if (udptest(s) == -1) {
708 ret = 1;
709 continue;
710 }
711 }
712
713 /* Don't look up port if -n. */
714 if (nflag)
715 sv = NULL((void*)0);
716 else {
717 sv = getservbyport(
718 ntohs(atoi(portlist[i]))(__uint16_t)(__builtin_constant_p(atoi(portlist[i])) ? (__uint16_t
)(((__uint16_t)(atoi(portlist[i])) & 0xffU) << 8 | (
(__uint16_t)(atoi(portlist[i])) & 0xff00U) >> 8) : __swap16md
(atoi(portlist[i]))),
719 uflag ? "udp" : "tcp");
720 }
721
722 fprintf(stderr(&__sF[2]), "Connection to %s", host);
723
724 /*
725 * if we aren't connecting thru a proxy and
726 * there is something to report, print IP
727 */
728 if (!nflag && !xflag
729 && (strcmp(host, ipaddr) != 0))
730 fprintf(stderr(&__sF[2]), " (%s)", ipaddr);
731
732 fprintf(stderr(&__sF[2]), " %s port [%s/%s] succeeded!\n",
733 portlist[i], uflag ? "udp" : "tcp",
734 sv ? sv->s_name : "*");
735 }
736 if (Fflag)
737 fdpass(s);
738 else {
739 if (usetls)
740 tls_setup_client(tls_ctx, s, host);
741 if (!zflag)
742 readwrite(s, tls_ctx);
743 if (tls_ctx)
744 timeout_tls(s, tls_ctx, tls_close);
745 }
746 }
747 }
748
749 if (s != -1)
750 close(s);
751 tls_free(tls_ctx);
752 tls_config_free(tls_cfg);
753
754 return ret;
755}
756
757/*
758 * unix_bind()
759 * Returns a unix socket bound to the given path
760 */
761int
762unix_bind(char *path, int flags)
763{
764 struct sockaddr_un s_un;
765 int s, save_errno;
766
767 /* Create unix domain socket. */
768 if ((s = socket(AF_UNIX1, flags | (uflag ? SOCK_DGRAM2 : SOCK_STREAM1),
769 0)) == -1)
770 return -1;
771
772 memset(&s_un, 0, sizeof(struct sockaddr_un));
773 s_un.sun_family = AF_UNIX1;
774
775 if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
776 sizeof(s_un.sun_path)) {
777 close(s);
778 errno(*__errno()) = ENAMETOOLONG63;
779 return -1;
780 }
781
782 if (bind(s, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) {
783 save_errno = errno(*__errno());
784 close(s);
785 errno(*__errno()) = save_errno;
786 return -1;
787 }
788 if (vflag)
789 report_sock("Bound", NULL((void*)0), 0, path);
790
791 return s;
792}
793
794int
795timeout_tls(int s, struct tls *tls_ctx, int (*func)(struct tls *))
796{
797 struct pollfd pfd;
798 int ret;
799
800 while ((ret = (*func)(tls_ctx)) != 0) {
801 if (ret == TLS_WANT_POLLIN-2)
802 pfd.events = POLLIN0x0001;
803 else if (ret == TLS_WANT_POLLOUT-3)
804 pfd.events = POLLOUT0x0004;
805 else
806 break;
807 pfd.fd = s;
808 if ((ret = poll(&pfd, 1, timeout)) == 1)
809 continue;
810 else if (ret == 0) {
811 errno(*__errno()) = ETIMEDOUT60;
812 ret = -1;
813 break;
814 } else
815 err(1, "poll failed");
816 }
817
818 return ret;
819}
820
821void
822tls_setup_client(struct tls *tls_ctx, int s, char *host)
823{
824 const char *errstr;
825
826 if (tls_connect_socket(tls_ctx, s,
827 tls_expectname ? tls_expectname : host) == -1) {
828 errx(1, "tls connection failed (%s)",
829 tls_error(tls_ctx));
830 }
831 if (timeout_tls(s, tls_ctx, tls_handshake) == -1) {
832 if ((errstr = tls_error(tls_ctx)) == NULL((void*)0))
833 errstr = strerror(errno(*__errno()));
834 errx(1, "tls handshake failed (%s)", errstr);
835 }
836 if (vflag)
837 report_tls(tls_ctx, host);
838 if (tls_expecthash && (tls_peer_cert_hash(tls_ctx) == NULL((void*)0) ||
839 strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0))
840 errx(1, "peer certificate is not %s", tls_expecthash);
841 if (Zflag) {
842 save_peer_cert(tls_ctx, Zflag);
843 if (Zflag != stderr(&__sF[2]) && (fclose(Zflag) != 0))
844 err(1, "fclose failed saving peer cert");
845 }
846}
847
848struct tls *
849tls_setup_server(struct tls *tls_ctx, int connfd, char *host)
850{
851 struct tls *tls_cctx;
852 const char *errstr;
853
854 if (tls_accept_socket(tls_ctx, &tls_cctx, connfd) == -1) {
855 warnx("tls accept failed (%s)", tls_error(tls_ctx));
856 } else if (timeout_tls(connfd, tls_cctx, tls_handshake) == -1) {
857 if ((errstr = tls_error(tls_cctx)) == NULL((void*)0))
858 errstr = strerror(errno(*__errno()));
859 warnx("tls handshake failed (%s)", errstr);
860 } else {
861 int gotcert = tls_peer_cert_provided(tls_cctx);
862
863 if (vflag && gotcert)
864 report_tls(tls_cctx, host);
865 if ((TLSopt & TLS_CCERT(1 << 3)) && !gotcert)
866 warnx("No client certificate provided");
867 else if (gotcert && tls_expecthash &&
868 (tls_peer_cert_hash(tls_cctx) == NULL((void*)0) ||
869 strcmp(tls_expecthash, tls_peer_cert_hash(tls_cctx)) != 0))
870 warnx("peer certificate is not %s", tls_expecthash);
871 else if (gotcert && tls_expectname &&
872 (!tls_peer_cert_contains_name(tls_cctx, tls_expectname)))
873 warnx("name (%s) not found in client cert",
874 tls_expectname);
875 else {
876 return tls_cctx;
877 }
878 }
879 return NULL((void*)0);
880}
881
882/*
883 * unix_connect()
884 * Returns a socket connected to a local unix socket. Returns -1 on failure.
885 */
886int
887unix_connect(char *path)
888{
889 struct sockaddr_un s_un;
890 int s, save_errno;
891
892 if (uflag) {
893 if ((s = unix_bind(unix_dg_tmp_socket, SOCK_CLOEXEC0x8000)) == -1)
894 return -1;
895 } else {
896 if ((s = socket(AF_UNIX1, SOCK_STREAM1 | SOCK_CLOEXEC0x8000, 0)) == -1)
897 return -1;
898 }
899
900 memset(&s_un, 0, sizeof(struct sockaddr_un));
901 s_un.sun_family = AF_UNIX1;
902
903 if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
904 sizeof(s_un.sun_path)) {
905 close(s);
906 errno(*__errno()) = ENAMETOOLONG63;
907 return -1;
908 }
909 if (connect(s, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) {
910 save_errno = errno(*__errno());
911 close(s);
912 errno(*__errno()) = save_errno;
913 return -1;
914 }
915 return s;
916
917}
918
919/*
920 * unix_listen()
921 * Create a unix domain socket, and listen on it.
922 */
923int
924unix_listen(char *path)
925{
926 int s;
927
928 if ((s = unix_bind(path, 0)) == -1)
929 return -1;
930 if (listen(s, 5) == -1) {
931 close(s);
932 return -1;
933 }
934 if (vflag)
935 report_sock("Listening", NULL((void*)0), 0, path);
936
937 return s;
938}
939
940/*
941 * remote_connect()
942 * Returns a socket connected to a remote host. Properly binds to a local
943 * port or source address if needed. Returns -1 on failure.
944 */
945int
946remote_connect(const char *host, const char *port, struct addrinfo hints,
947 char *ipaddr)
948{
949 struct addrinfo *res, *res0;
950 int s = -1, error, herr, on = 1, save_errno;
951
952 if ((error = getaddrinfo(host, port, &hints, &res0)))
953 errx(1, "getaddrinfo for host \"%s\" port %s: %s", host,
954 port, gai_strerror(error));
955
956 for (res = res0; res; res = res->ai_next) {
957 if ((s = socket(res->ai_family, res->ai_socktype |
958 SOCK_NONBLOCK0x4000, res->ai_protocol)) == -1)
959 continue;
960
961 /* Bind to a local port or source address if specified. */
962 if (sflag || pflag) {
963 struct addrinfo ahints, *ares;
964
965 /* try SO_BINDANY, but don't insist */
966 setsockopt(s, SOL_SOCKET0xffff, SO_BINDANY0x1000, &on, sizeof(on));
967 memset(&ahints, 0, sizeof(struct addrinfo));
968 ahints.ai_family = res->ai_family;
969 ahints.ai_socktype = uflag ? SOCK_DGRAM2 : SOCK_STREAM1;
970 ahints.ai_protocol = uflag ? IPPROTO_UDP17 : IPPROTO_TCP6;
971 ahints.ai_flags = AI_PASSIVE1;
972 if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
973 errx(1, "getaddrinfo: %s", gai_strerror(error));
974
975 if (bind(s, (struct sockaddr *)ares->ai_addr,
976 ares->ai_addrlen) == -1)
977 err(1, "bind failed");
978 freeaddrinfo(ares);
979 }
980
981 set_common_sockopts(s, res->ai_family);
982
983 if (ipaddr != NULL((void*)0)) {
984 herr = getnameinfo(res->ai_addr, res->ai_addrlen,
985 ipaddr, NI_MAXHOST256, NULL((void*)0), 0, NI_NUMERICHOST1);
986 switch (herr) {
987 case 0:
988 break;
989 case EAI_SYSTEM-11:
990 err(1, "getnameinfo");
991 default:
992 errx(1, "getnameinfo: %s", gai_strerror(herr));
993 }
994 }
995
996 if (timeout_connect(s, res->ai_addr, res->ai_addrlen) == 0)
997 break;
998
999 if (vflag) {
1000 /* only print IP if there is something to report */
1001 if (nflag || ipaddr == NULL((void*)0) ||
1002 (strncmp(host, ipaddr, NI_MAXHOST256) == 0))
1003 warn("connect to %s port %s (%s) failed", host,
1004 port, uflag ? "udp" : "tcp");
1005 else
1006 warn("connect to %s (%s) port %s (%s) failed",
1007 host, ipaddr, port, uflag ? "udp" : "tcp");
1008 }
1009
1010 save_errno = errno(*__errno());
1011 close(s);
1012 errno(*__errno()) = save_errno;
1013 s = -1;
1014 }
1015
1016 freeaddrinfo(res0);
1017
1018 return s;
1019}
1020
1021int
1022timeout_connect(int s, const struct sockaddr *name, socklen_t namelen)
1023{
1024 struct pollfd pfd;
1025 socklen_t optlen;
1026 int optval;
1027 int ret;
1028
1029 if ((ret = connect(s, name, namelen)) != 0 && errno(*__errno()) == EINPROGRESS36) {
1030 pfd.fd = s;
1031 pfd.events = POLLOUT0x0004;
1032 if ((ret = poll(&pfd, 1, timeout)) == 1) {
1033 optlen = sizeof(optval);
1034 if ((ret = getsockopt(s, SOL_SOCKET0xffff, SO_ERROR0x1007,
1035 &optval, &optlen)) == 0) {
1036 errno(*__errno()) = optval;
1037 ret = optval == 0 ? 0 : -1;
1038 }
1039 } else if (ret == 0) {
1040 errno(*__errno()) = ETIMEDOUT60;
1041 ret = -1;
1042 } else
1043 err(1, "poll failed");
1044 }
1045
1046 return ret;
1047}
1048
1049/*
1050 * local_listen()
1051 * Returns a socket listening on a local port, binds to specified source
1052 * address. Returns -1 on failure.
1053 */
1054int
1055local_listen(const char *host, const char *port, struct addrinfo hints)
1056{
1057 struct addrinfo *res, *res0;
1058 int s = -1, ret, x = 1, save_errno;
1059 int error;
1060
1061 /* Allow nodename to be null. */
1062 hints.ai_flags |= AI_PASSIVE1;
1063
1064 /*
1065 * In the case of binding to a wildcard address
1066 * default to binding to an ipv4 address.
1067 */
1068 if (host == NULL((void*)0) && hints.ai_family == AF_UNSPEC0)
1069 hints.ai_family = AF_INET2;
1070
1071 if ((error = getaddrinfo(host, port, &hints, &res0)))
1072 errx(1, "getaddrinfo: %s", gai_strerror(error));
1073
1074 for (res = res0; res; res = res->ai_next) {
1075 if ((s = socket(res->ai_family, res->ai_socktype,
1076 res->ai_protocol)) == -1)
1077 continue;
1078
1079 ret = setsockopt(s, SOL_SOCKET0xffff, SO_REUSEPORT0x0200, &x, sizeof(x));
1080 if (ret == -1)
1081 err(1, NULL((void*)0));
1082
1083 set_common_sockopts(s, res->ai_family);
1084
1085 if (bind(s, (struct sockaddr *)res->ai_addr,
1086 res->ai_addrlen) == 0)
1087 break;
1088
1089 save_errno = errno(*__errno());
1090 close(s);
1091 errno(*__errno()) = save_errno;
1092 s = -1;
1093 }
1094
1095 if (!uflag && s != -1) {
1096 if (listen(s, 1) == -1)
1097 err(1, "listen");
1098 }
1099 if (vflag && s != -1) {
1100 struct sockaddr_storage ss;
1101 socklen_t len;
1102
1103 len = sizeof(ss);
1104 if (getsockname(s, (struct sockaddr *)&ss, &len) == -1)
1105 err(1, "getsockname");
1106 report_sock(uflag ? "Bound" : "Listening",
1107 (struct sockaddr *)&ss, len, NULL((void*)0));
1108 }
1109
1110 freeaddrinfo(res0);
1111
1112 return s;
1113}
1114
1115/*
1116 * readwrite()
1117 * Loop that polls on the network file descriptor and stdin.
1118 */
1119void
1120readwrite(int net_fd, struct tls *tls_ctx)
1121{
1122 struct pollfd pfd[4];
1123 int stdin_fd = STDIN_FILENO0;
1124 int stdout_fd = STDOUT_FILENO1;
1125 unsigned char netinbuf[BUFSIZE16384];
1126 size_t netinbufpos = 0;
1127 unsigned char stdinbuf[BUFSIZE16384];
1128 size_t stdinbufpos = 0;
1129 int n, num_fds;
1130 ssize_t ret;
1131
1132 /* don't read from stdin if requested */
1133 if (dflag)
1134 stdin_fd = -1;
1135
1136 /* stdin */
1137 pfd[POLL_STDIN0].fd = stdin_fd;
1138 pfd[POLL_STDIN0].events = POLLIN0x0001;
1139
1140 /* network out */
1141 pfd[POLL_NETOUT1].fd = net_fd;
1142 pfd[POLL_NETOUT1].events = 0;
1143
1144 /* network in */
1145 pfd[POLL_NETIN2].fd = net_fd;
1146 pfd[POLL_NETIN2].events = POLLIN0x0001;
1147
1148 /* stdout */
1149 pfd[POLL_STDOUT3].fd = stdout_fd;
1150 pfd[POLL_STDOUT3].events = 0;
1151
1152 while (1) {
1153 /* both inputs are gone, buffers are empty, we are done */
1154 if (pfd[POLL_STDIN0].fd == -1 && pfd[POLL_NETIN2].fd == -1 &&
1155 stdinbufpos == 0 && netinbufpos == 0)
1156 return;
1157 /* both outputs are gone, we can't continue */
1158 if (pfd[POLL_NETOUT1].fd == -1 && pfd[POLL_STDOUT3].fd == -1)
1159 return;
1160 /* listen and net in gone, queues empty, done */
1161 if (lflag && pfd[POLL_NETIN2].fd == -1 &&
1162 stdinbufpos == 0 && netinbufpos == 0)
1163 return;
1164
1165 /* help says -i is for "wait between lines sent". We read and
1166 * write arbitrary amounts of data, and we don't want to start
1167 * scanning for newlines, so this is as good as it gets */
1168 if (iflag)
1169 sleep(iflag);
1170
1171 /* poll */
1172 num_fds = poll(pfd, 4, timeout);
1173
1174 /* treat poll errors */
1175 if (num_fds == -1)
1176 err(1, "polling error");
1177
1178 /* timeout happened */
1179 if (num_fds == 0)
1180 return;
1181
1182 /* treat socket error conditions */
1183 for (n = 0; n < 4; n++) {
1184 if (pfd[n].revents & (POLLERR0x0008|POLLNVAL0x0020)) {
1185 pfd[n].fd = -1;
1186 }
1187 }
1188 /* reading is possible after HUP */
1189 if (pfd[POLL_STDIN0].events & POLLIN0x0001 &&
1190 pfd[POLL_STDIN0].revents & POLLHUP0x0010 &&
1191 !(pfd[POLL_STDIN0].revents & POLLIN0x0001))
1192 pfd[POLL_STDIN0].fd = -1;
1193
1194 if (pfd[POLL_NETIN2].events & POLLIN0x0001 &&
1195 pfd[POLL_NETIN2].revents & POLLHUP0x0010 &&
1196 !(pfd[POLL_NETIN2].revents & POLLIN0x0001))
1197 pfd[POLL_NETIN2].fd = -1;
1198
1199 if (pfd[POLL_NETOUT1].revents & POLLHUP0x0010) {
1200 if (Nflag)
1201 shutdown(pfd[POLL_NETOUT1].fd, SHUT_WR1);
1202 pfd[POLL_NETOUT1].fd = -1;
1203 }
1204 /* if HUP, stop watching stdout */
1205 if (pfd[POLL_STDOUT3].revents & POLLHUP0x0010)
1206 pfd[POLL_STDOUT3].fd = -1;
1207 /* if no net out, stop watching stdin */
1208 if (pfd[POLL_NETOUT1].fd == -1)
1209 pfd[POLL_STDIN0].fd = -1;
1210 /* if no stdout, stop watching net in */
1211 if (pfd[POLL_STDOUT3].fd == -1) {
1212 if (pfd[POLL_NETIN2].fd != -1)
1213 shutdown(pfd[POLL_NETIN2].fd, SHUT_RD0);
1214 pfd[POLL_NETIN2].fd = -1;
1215 }
1216
1217 /* try to read from stdin */
1218 if (pfd[POLL_STDIN0].revents & POLLIN0x0001 && stdinbufpos < BUFSIZE16384) {
1219 ret = fillbuf(pfd[POLL_STDIN0].fd, stdinbuf,
1220 &stdinbufpos, NULL((void*)0));
1221 if (ret == TLS_WANT_POLLIN-2)
1222 pfd[POLL_STDIN0].events = POLLIN0x0001;
1223 else if (ret == TLS_WANT_POLLOUT-3)
1224 pfd[POLL_STDIN0].events = POLLOUT0x0004;
1225 else if (ret == 0 || ret == -1)
1226 pfd[POLL_STDIN0].fd = -1;
1227 /* read something - poll net out */
1228 if (stdinbufpos > 0)
1229 pfd[POLL_NETOUT1].events = POLLOUT0x0004;
1230 /* filled buffer - remove self from polling */
1231 if (stdinbufpos == BUFSIZE16384)
1232 pfd[POLL_STDIN0].events = 0;
1233 }
1234 /* try to write to network */
1235 if (pfd[POLL_NETOUT1].revents & POLLOUT0x0004 && stdinbufpos > 0) {
1236 ret = drainbuf(pfd[POLL_NETOUT1].fd, stdinbuf,
1237 &stdinbufpos, tls_ctx);
1238 if (ret == TLS_WANT_POLLIN-2)
1239 pfd[POLL_NETOUT1].events = POLLIN0x0001;
1240 else if (ret == TLS_WANT_POLLOUT-3)
1241 pfd[POLL_NETOUT1].events = POLLOUT0x0004;
1242 else if (ret == -1)
1243 pfd[POLL_NETOUT1].fd = -1;
1244 /* buffer empty - remove self from polling */
1245 if (stdinbufpos == 0)
1246 pfd[POLL_NETOUT1].events = 0;
1247 /* buffer no longer full - poll stdin again */
1248 if (stdinbufpos < BUFSIZE16384)
1249 pfd[POLL_STDIN0].events = POLLIN0x0001;
1250 }
1251 /* try to read from network */
1252 if (pfd[POLL_NETIN2].revents & POLLIN0x0001 && netinbufpos < BUFSIZE16384) {
1253 ret = fillbuf(pfd[POLL_NETIN2].fd, netinbuf,
1254 &netinbufpos, tls_ctx);
1255 if (ret == TLS_WANT_POLLIN-2)
1256 pfd[POLL_NETIN2].events = POLLIN0x0001;
1257 else if (ret == TLS_WANT_POLLOUT-3)
1258 pfd[POLL_NETIN2].events = POLLOUT0x0004;
1259 else if (ret == -1)
1260 pfd[POLL_NETIN2].fd = -1;
1261 /* eof on net in - remove from pfd */
1262 if (ret == 0) {
1263 shutdown(pfd[POLL_NETIN2].fd, SHUT_RD0);
1264 pfd[POLL_NETIN2].fd = -1;
1265 }
1266 if (recvlimit > 0 && ++recvcount >= recvlimit) {
1267 if (pfd[POLL_NETIN2].fd != -1)
1268 shutdown(pfd[POLL_NETIN2].fd, SHUT_RD0);
1269 pfd[POLL_NETIN2].fd = -1;
1270 pfd[POLL_STDIN0].fd = -1;
1271 }
1272 /* read something - poll stdout */
1273 if (netinbufpos > 0)
1274 pfd[POLL_STDOUT3].events = POLLOUT0x0004;
1275 /* filled buffer - remove self from polling */
1276 if (netinbufpos == BUFSIZE16384)
1277 pfd[POLL_NETIN2].events = 0;
1278 /* handle telnet */
1279 if (tflag)
1280 atelnet(pfd[POLL_NETIN2].fd, netinbuf,
1281 netinbufpos);
1282 }
1283 /* try to write to stdout */
1284 if (pfd[POLL_STDOUT3].revents & POLLOUT0x0004 && netinbufpos > 0) {
1285 ret = drainbuf(pfd[POLL_STDOUT3].fd, netinbuf,
1286 &netinbufpos, NULL((void*)0));
1287 if (ret == TLS_WANT_POLLIN-2)
1288 pfd[POLL_STDOUT3].events = POLLIN0x0001;
1289 else if (ret == TLS_WANT_POLLOUT-3)
1290 pfd[POLL_STDOUT3].events = POLLOUT0x0004;
1291 else if (ret == -1)
1292 pfd[POLL_STDOUT3].fd = -1;
1293 /* buffer empty - remove self from polling */
1294 if (netinbufpos == 0)
1295 pfd[POLL_STDOUT3].events = 0;
1296 /* buffer no longer full - poll net in again */
1297 if (netinbufpos < BUFSIZE16384)
1298 pfd[POLL_NETIN2].events = POLLIN0x0001;
1299 }
1300
1301 /* stdin gone and queue empty? */
1302 if (pfd[POLL_STDIN0].fd == -1 && stdinbufpos == 0) {
1303 if (pfd[POLL_NETOUT1].fd != -1 && Nflag)
1304 shutdown(pfd[POLL_NETOUT1].fd, SHUT_WR1);
1305 pfd[POLL_NETOUT1].fd = -1;
1306 }
1307 /* net in gone and queue empty? */
1308 if (pfd[POLL_NETIN2].fd == -1 && netinbufpos == 0) {
1309 pfd[POLL_STDOUT3].fd = -1;
1310 }
1311 }
1312}
1313
1314ssize_t
1315drainbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1316{
1317 ssize_t n;
1318 ssize_t adjust;
1319
1320 if (tls) {
1321 n = tls_write(tls, buf, *bufpos);
1322 if (n == -1)
1323 errx(1, "tls write failed (%s)", tls_error(tls));
1324 } else {
1325 n = write(fd, buf, *bufpos);
1326 /* don't treat EAGAIN, EINTR as error */
1327 if (n == -1 && (errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EINTR4))
1328 n = TLS_WANT_POLLOUT-3;
1329 }
1330 if (n <= 0)
1331 return n;
1332 /* adjust buffer */
1333 adjust = *bufpos - n;
1334 if (adjust > 0)
1335 memmove(buf, buf + n, adjust);
1336 *bufpos -= n;
1337 return n;
1338}
1339
1340ssize_t
1341fillbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1342{
1343 size_t num = BUFSIZE16384 - *bufpos;
1344 ssize_t n;
1345
1346 if (tls) {
1347 n = tls_read(tls, buf + *bufpos, num);
1348 if (n == -1)
1349 errx(1, "tls read failed (%s)", tls_error(tls));
1350 } else {
1351 n = read(fd, buf + *bufpos, num);
1352 /* don't treat EAGAIN, EINTR as error */
1353 if (n == -1 && (errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EINTR4))
1354 n = TLS_WANT_POLLIN-2;
1355 }
1356 if (n <= 0)
1357 return n;
1358 *bufpos += n;
1359 return n;
1360}
1361
1362/*
1363 * fdpass()
1364 * Pass the connected file descriptor to stdout and exit.
1365 */
1366void
1367fdpass(int nfd)
1368{
1369 struct msghdr mh;
1370 union {
1371 struct cmsghdr hdr;
1372 char buf[CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1
)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int))
+ (sizeof(long) - 1)) &~(sizeof(long) - 1)))];
1373 } cmsgbuf;
1374 struct cmsghdr *cmsg;
1375 struct iovec iov;
1376 char c = '\0';
1377 ssize_t r;
1378 struct pollfd pfd;
1379
1380 /* Avoid obvious stupidity */
1381 if (isatty(STDOUT_FILENO1))
1382 errx(1, "Cannot pass file descriptor to tty");
1383
1384 memset(&mh, 0, sizeof(mh));
1385 memset(&cmsgbuf, 0, sizeof(cmsgbuf));
1386 memset(&iov, 0, sizeof(iov));
1387
1388 mh.msg_control = (caddr_t)&cmsgbuf.buf;
1389 mh.msg_controllen = sizeof(cmsgbuf.buf);
1390 cmsg = CMSG_FIRSTHDR(&mh)((&mh)->msg_controllen >= sizeof(struct cmsghdr) ? (
struct cmsghdr *)(&mh)->msg_control : (struct cmsghdr *
)((void*)0));
1391 cmsg->cmsg_len = CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1
)) &~(sizeof(long) - 1)) + (sizeof(int)));
1392 cmsg->cmsg_level = SOL_SOCKET0xffff;
1393 cmsg->cmsg_type = SCM_RIGHTS0x01;
1394 *(int *)CMSG_DATA(cmsg)((unsigned char *)(cmsg) + (((unsigned long)(sizeof(struct cmsghdr
)) + (sizeof(long) - 1)) &~(sizeof(long) - 1))) = nfd;
1395
1396 iov.iov_base = &c;
1397 iov.iov_len = 1;
1398 mh.msg_iov = &iov;
1399 mh.msg_iovlen = 1;
1400
1401 memset(&pfd, 0, sizeof(pfd));
1402 pfd.fd = STDOUT_FILENO1;
1403 pfd.events = POLLOUT0x0004;
1404 for (;;) {
1405 r = sendmsg(STDOUT_FILENO1, &mh, 0);
1406 if (r == -1) {
1407 if (errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EINTR4) {
1408 if (poll(&pfd, 1, -1) == -1)
1409 err(1, "poll");
1410 continue;
1411 }
1412 err(1, "sendmsg");
1413 } else if (r != 1)
1414 errx(1, "sendmsg: unexpected return value %zd", r);
1415 else
1416 break;
1417 }
1418 exit(0);
1419}
1420
1421/* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */
1422void
1423atelnet(int nfd, unsigned char *buf, unsigned int size)
1424{
1425 unsigned char *p, *end;
1426 unsigned char obuf[4];
1427
1428 if (size < 3)
1429 return;
1430 end = buf + size - 2;
1431
1432 for (p = buf; p < end; p++) {
1433 if (*p != IAC255)
1434 continue;
1435
1436 obuf[0] = IAC255;
1437 p++;
1438 if ((*p == WILL251) || (*p == WONT252))
1439 obuf[1] = DONT254;
1440 else if ((*p == DO253) || (*p == DONT254))
1441 obuf[1] = WONT252;
1442 else
1443 continue;
1444
1445 p++;
1446 obuf[2] = *p;
1447 if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, nfd, obuf, 3) != 3)
1448 warn("Write Error!");
1449 }
1450}
1451
1452
1453int
1454strtoport(char *portstr, int udp)
1455{
1456 struct servent *entry;
1457 const char *errstr;
1458 char *proto;
1459 int port = -1;
1460
1461 proto = udp ? "udp" : "tcp";
1462
1463 port = strtonum(portstr, 1, PORT_MAX65535, &errstr);
1464 if (errstr == NULL((void*)0))
1465 return port;
1466 if (errno(*__errno()) != EINVAL22)
1467 errx(1, "port number %s: %s", errstr, portstr);
1468 if ((entry = getservbyname(portstr, proto)) == NULL((void*)0))
1469 errx(1, "service \"%s\" unknown", portstr);
1470 return ntohs(entry->s_port)(__uint16_t)(__builtin_constant_p(entry->s_port) ? (__uint16_t
)(((__uint16_t)(entry->s_port) & 0xffU) << 8 | (
(__uint16_t)(entry->s_port) & 0xff00U) >> 8) : __swap16md
(entry->s_port));
1471}
1472
1473/*
1474 * build_ports()
1475 * Build an array of ports in portlist[], listing each port
1476 * that we should try to connect to.
1477 */
1478void
1479build_ports(char *p)
1480{
1481 char *n;
1482 int hi, lo, cp;
1483 int x = 0;
1484
1485 if (isdigit((unsigned char)*p) && (n = strchr(p, '-')) != NULL((void*)0)) {
1486 *n = '\0';
1487 n++;
1488
1489 /* Make sure the ports are in order: lowest->highest. */
1490 hi = strtoport(n, uflag);
1491 lo = strtoport(p, uflag);
1492 if (lo > hi) {
1493 cp = hi;
1494 hi = lo;
1495 lo = cp;
1496 }
1497
1498 /*
1499 * Initialize portlist with a random permutation. Based on
1500 * Knuth, as in ip_randomid() in sys/netinet/ip_id.c.
1501 */
1502 if (rflag) {
1503 for (x = 0; x <= hi - lo; x++) {
1504 cp = arc4random_uniform(x + 1);
1505 portlist[x] = portlist[cp];
1506 if (asprintf(&portlist[cp], "%d", x + lo) == -1)
1507 err(1, "asprintf");
1508 }
1509 } else { /* Load ports sequentially. */
1510 for (cp = lo; cp <= hi; cp++) {
1511 if (asprintf(&portlist[x], "%d", cp) == -1)
1512 err(1, "asprintf");
1513 x++;
1514 }
1515 }
1516 } else {
1517 char *tmp;
1518
1519 hi = strtoport(p, uflag);
1520 if (asprintf(&tmp, "%d", hi) != -1)
1521 portlist[0] = tmp;
1522 else
1523 err(1, NULL((void*)0));
1524 }
1525}
1526
1527/*
1528 * udptest()
1529 * Do a few writes to see if the UDP port is there.
1530 * Fails once PF state table is full.
1531 */
1532int
1533udptest(int s)
1534{
1535 int i, ret;
1536
1537 for (i = 0; i <= 3; i++) {
1538 if (write(s, "X", 1) == 1)
1539 ret = 1;
1540 else
1541 ret = -1;
1542 }
1543 return ret;
1544}
1545
1546void
1547set_common_sockopts(int s, int af)
1548{
1549 int x = 1;
1550
1551 if (Sflag) {
1552 if (setsockopt(s, IPPROTO_TCP6, TCP_MD5SIG0x04,
1553 &x, sizeof(x)) == -1)
1554 err(1, NULL((void*)0));
1555 }
1556 if (Dflag) {
1557 if (setsockopt(s, SOL_SOCKET0xffff, SO_DEBUG0x0001,
1558 &x, sizeof(x)) == -1)
1559 err(1, NULL((void*)0));
1560 }
1561 if (Tflag != -1) {
1562 if (af == AF_INET2 && setsockopt(s, IPPROTO_IP0,
1563 IP_TOS3, &Tflag, sizeof(Tflag)) == -1)
1564 err(1, "set IP ToS");
1565
1566 else if (af == AF_INET624 && setsockopt(s, IPPROTO_IPV641,
1567 IPV6_TCLASS61, &Tflag, sizeof(Tflag)) == -1)
1568 err(1, "set IPv6 traffic class");
1569 }
1570 if (Iflag) {
1571 if (setsockopt(s, SOL_SOCKET0xffff, SO_RCVBUF0x1002,
1572 &Iflag, sizeof(Iflag)) == -1)
1573 err(1, "set TCP receive buffer size");
1574 }
1575 if (Oflag) {
1576 if (setsockopt(s, SOL_SOCKET0xffff, SO_SNDBUF0x1001,
1577 &Oflag, sizeof(Oflag)) == -1)
1578 err(1, "set TCP send buffer size");
1579 }
1580
1581 if (ttl != -1) {
1582 if (af == AF_INET2 && setsockopt(s, IPPROTO_IP0,
1583 IP_TTL4, &ttl, sizeof(ttl)))
1584 err(1, "set IP TTL");
1585
1586 else if (af == AF_INET624 && setsockopt(s, IPPROTO_IPV641,
1587 IPV6_UNICAST_HOPS4, &ttl, sizeof(ttl)))
1588 err(1, "set IPv6 unicast hops");
1589 }
1590
1591 if (minttl != -1) {
1592 if (af == AF_INET2 && setsockopt(s, IPPROTO_IP0,
1593 IP_MINTTL32, &minttl, sizeof(minttl)))
1594 err(1, "set IP min TTL");
1595
1596 else if (af == AF_INET624 && setsockopt(s, IPPROTO_IPV641,
1597 IPV6_MINHOPCOUNT65, &minttl, sizeof(minttl)))
1598 err(1, "set IPv6 min hop count");
1599 }
1600}
1601
1602int
1603process_tos_opt(char *s, int *val)
1604{
1605 /* DiffServ Codepoints and other TOS mappings */
1606 const struct toskeywords {
1607 const char *keyword;
1608 int val;
1609 } *t, toskeywords[] = {
1610 { "af11", IPTOS_DSCP_AF110x28 },
1611 { "af12", IPTOS_DSCP_AF120x30 },
1612 { "af13", IPTOS_DSCP_AF130x38 },
1613 { "af21", IPTOS_DSCP_AF210x48 },
1614 { "af22", IPTOS_DSCP_AF220x50 },
1615 { "af23", IPTOS_DSCP_AF230x58 },
1616 { "af31", IPTOS_DSCP_AF310x68 },
1617 { "af32", IPTOS_DSCP_AF320x70 },
1618 { "af33", IPTOS_DSCP_AF330x78 },
1619 { "af41", IPTOS_DSCP_AF410x88 },
1620 { "af42", IPTOS_DSCP_AF420x90 },
1621 { "af43", IPTOS_DSCP_AF430x98 },
1622 { "critical", IPTOS_PREC_CRITIC_ECP0xa0 },
1623 { "cs0", IPTOS_DSCP_CS00x00 },
1624 { "cs1", IPTOS_DSCP_CS10x20 },
1625 { "cs2", IPTOS_DSCP_CS20x40 },
1626 { "cs3", IPTOS_DSCP_CS30x60 },
1627 { "cs4", IPTOS_DSCP_CS40x80 },
1628 { "cs5", IPTOS_DSCP_CS50xa0 },
1629 { "cs6", IPTOS_DSCP_CS60xc0 },
1630 { "cs7", IPTOS_DSCP_CS70xe0 },
1631 { "ef", IPTOS_DSCP_EF0xb8 },
1632 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL0xc0 },
1633 { "lowdelay", IPTOS_LOWDELAY0x10 },
1634 { "netcontrol", IPTOS_PREC_NETCONTROL0xe0 },
1635 { "reliability", IPTOS_RELIABILITY0x04 },
1636 { "throughput", IPTOS_THROUGHPUT0x08 },
1637 { NULL((void*)0), -1 },
1638 };
1639
1640 for (t = toskeywords; t->keyword != NULL((void*)0); t++) {
1641 if (strcmp(s, t->keyword) == 0) {
1642 *val = t->val;
1643 return 1;
1644 }
1645 }
1646
1647 return 0;
1648}
1649
1650int
1651process_tls_opt(char *s, int *flags)
1652{
1653 size_t len;
1654 char *v;
1655
1656 const struct tlskeywords {
1657 const char *keyword;
1658 int flag;
1659 char **value;
1660 } *t, tlskeywords[] = {
1661 { "ciphers", -1, &tls_ciphers },
1662 { "clientcert", TLS_CCERT(1 << 3), NULL((void*)0) },
1663 { "muststaple", TLS_MUSTSTAPLE(1 << 4), NULL((void*)0) },
1664 { "noverify", TLS_NOVERIFY(1 << 1), NULL((void*)0) },
1665 { "noname", TLS_NONAME(1 << 2), NULL((void*)0) },
1666 { "protocols", -1, &tls_protocols },
1667 { NULL((void*)0), -1, NULL((void*)0) },
1668 };
1669
1670 len = strlen(s);
1671 if ((v = strchr(s, '=')) != NULL((void*)0)) {
1672 len = v - s;
1673 v++;
1674 }
1675
1676 for (t = tlskeywords; t->keyword != NULL((void*)0); t++) {
1677 if (strlen(t->keyword) == len &&
1678 strncmp(s, t->keyword, len) == 0) {
1679 if (t->value != NULL((void*)0)) {
1680 if (v == NULL((void*)0))
1681 errx(1, "invalid tls value `%s'", s);
1682 *t->value = v;
1683 } else {
1684 *flags |= t->flag;
1685 }
1686 return 1;
1687 }
1688 }
1689 return 0;
1690}
1691
1692void
1693save_peer_cert(struct tls *tls_ctx, FILE *fp)
1694{
1695 const char *pem;
1696 size_t plen;
1697
1698 if ((pem = tls_peer_cert_chain_pem(tls_ctx, &plen)) == NULL((void*)0))
1699 errx(1, "Can't get peer certificate");
1700 if (fprintf(fp, "%.*s", (int)plen, pem) < 0)
1701 err(1, "unable to save peer cert");
1702 if (fflush(fp) != 0)
1703 err(1, "unable to flush peer cert");
1704}
1705
1706void
1707report_tls(struct tls * tls_ctx, char * host)
1708{
1709 time_t t;
1710 const char *ocsp_url;
1711
1712 fprintf(stderr(&__sF[2]), "TLS handshake negotiated %s/%s with host %s\n",
1713 tls_conn_version(tls_ctx), tls_conn_cipher(tls_ctx), host);
1714 fprintf(stderr(&__sF[2]), "Peer name: %s\n",
1715 tls_expectname ? tls_expectname : host);
1716 if (tls_peer_cert_subject(tls_ctx))
1717 fprintf(stderr(&__sF[2]), "Subject: %s\n",
1718 tls_peer_cert_subject(tls_ctx));
1719 if (tls_peer_cert_issuer(tls_ctx))
1720 fprintf(stderr(&__sF[2]), "Issuer: %s\n",
1721 tls_peer_cert_issuer(tls_ctx));
1722 if ((t = tls_peer_cert_notbefore(tls_ctx)) != -1)
1723 fprintf(stderr(&__sF[2]), "Valid From: %s", ctime(&t));
1724 if ((t = tls_peer_cert_notafter(tls_ctx)) != -1)
1725 fprintf(stderr(&__sF[2]), "Valid Until: %s", ctime(&t));
1726 if (tls_peer_cert_hash(tls_ctx))
1727 fprintf(stderr(&__sF[2]), "Cert Hash: %s\n",
1728 tls_peer_cert_hash(tls_ctx));
1729 ocsp_url = tls_peer_ocsp_url(tls_ctx);
1730 if (ocsp_url != NULL((void*)0))
1731 fprintf(stderr(&__sF[2]), "OCSP URL: %s\n", ocsp_url);
1732 switch (tls_peer_ocsp_response_status(tls_ctx)) {
1733 case TLS_OCSP_RESPONSE_SUCCESSFUL0:
1734 fprintf(stderr(&__sF[2]), "OCSP Stapling: %s\n",
1735 tls_peer_ocsp_result(tls_ctx) == NULL((void*)0) ? "" :
1736 tls_peer_ocsp_result(tls_ctx));
1737 fprintf(stderr(&__sF[2]),
1738 " response_status=%d cert_status=%d crl_reason=%d\n",
1739 tls_peer_ocsp_response_status(tls_ctx),
1740 tls_peer_ocsp_cert_status(tls_ctx),
1741 tls_peer_ocsp_crl_reason(tls_ctx));
1742 t = tls_peer_ocsp_this_update(tls_ctx);
1743 fprintf(stderr(&__sF[2]), " this update: %s",
1744 t != -1 ? ctime(&t) : "\n");
1745 t = tls_peer_ocsp_next_update(tls_ctx);
1746 fprintf(stderr(&__sF[2]), " next update: %s",
1747 t != -1 ? ctime(&t) : "\n");
1748 t = tls_peer_ocsp_revocation_time(tls_ctx);
1749 fprintf(stderr(&__sF[2]), " revocation: %s",
1750 t != -1 ? ctime(&t) : "\n");
1751 break;
1752 case -1:
1753 break;
1754 default:
1755 fprintf(stderr(&__sF[2]), "OCSP Stapling: failure - response_status %d (%s)\n",
1756 tls_peer_ocsp_response_status(tls_ctx),
1757 tls_peer_ocsp_result(tls_ctx) == NULL((void*)0) ? "" :
1758 tls_peer_ocsp_result(tls_ctx));
1759 break;
1760
1761 }
1762}
1763
1764void
1765report_sock(const char *msg, const struct sockaddr *sa, socklen_t salen,
1766 char *path)
1767{
1768 char host[NI_MAXHOST256], port[NI_MAXSERV32];
1769 int herr;
1770 int flags = NI_NUMERICSERV2;
1771
1772 if (path != NULL((void*)0)) {
1773 fprintf(stderr(&__sF[2]), "%s on %s\n", msg, path);
1774 return;
1775 }
1776
1777 if (nflag)
1778 flags |= NI_NUMERICHOST1;
1779
1780 herr = getnameinfo(sa, salen, host, sizeof(host), port, sizeof(port),
1781 flags);
1782 switch (herr) {
1783 case 0:
1784 break;
1785 case EAI_SYSTEM-11:
1786 err(1, "getnameinfo");
1787 default:
1788 errx(1, "getnameinfo: %s", gai_strerror(herr));
1789 }
1790
1791 fprintf(stderr(&__sF[2]), "%s on %s %s\n", msg, host, port);
1792}
1793
1794void
1795help(void)
1796{
1797 usage(0);
1798 fprintf(stderr(&__sF[2]), "\tCommand Summary:\n\
1799 \t-4 Use IPv4\n\
1800 \t-6 Use IPv6\n\
1801 \t-C certfile Public key file\n\
1802 \t-c Use TLS\n\
1803 \t-D Enable the debug socket option\n\
1804 \t-d Detach from stdin\n\
1805 \t-e name\t Required name in peer certificate\n\
1806 \t-F Pass socket fd\n\
1807 \t-H hash\t Hash string of peer certificate\n\
1808 \t-h This help text\n\
1809 \t-I length TCP receive buffer length\n\
1810 \t-i interval Delay interval for lines sent, ports scanned\n\
1811 \t-K keyfile Private key file\n\
1812 \t-k Keep inbound sockets open for multiple connects\n\
1813 \t-l Listen mode, for inbound connects\n\
1814 \t-M ttl Outgoing TTL / Hop Limit\n\
1815 \t-m minttl Minimum incoming TTL / Hop Limit\n\
1816 \t-N Shutdown the network socket after EOF on stdin\n\
1817 \t-n Suppress name/port resolutions\n\
1818 \t-O length TCP send buffer length\n\
1819 \t-o staplefile Staple file\n\
1820 \t-P proxyuser\tUsername for proxy authentication\n\
1821 \t-p port\t Specify local port for remote connects\n\
1822 \t-R CAfile CA bundle\n\
1823 \t-r Randomize remote ports\n\
1824 \t-S Enable the TCP MD5 signature option\n\
1825 \t-s sourceaddr Local source address\n\
1826 \t-T keyword TOS value or TLS options\n\
1827 \t-t Answer TELNET negotiation\n\
1828 \t-U Use UNIX domain socket\n\
1829 \t-u UDP mode\n\
1830 \t-V rtable Specify alternate routing table\n\
1831 \t-v Verbose\n\
1832 \t-W recvlimit Terminate after receiving a number of packets\n\
1833 \t-w timeout Timeout for connects and final net reads\n\
1834 \t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
1835 \t-x addr[:port]\tSpecify proxy address and port\n\
1836 \t-Z Peer certificate file\n\
1837 \t-z Zero-I/O mode [used for scanning]\n\
1838 Port numbers can be individual or ranges: lo-hi [inclusive]\n");
1839 exit(1);
1840}
1841
1842void
1843usage(int ret)
1844{
1845 fprintf(stderr(&__sF[2]),
1846 "usage: nc [-46cDdFhklNnrStUuvz] [-C certfile] [-e name] "
1847 "[-H hash] [-I length]\n"
1848 "\t [-i interval] [-K keyfile] [-M ttl] [-m minttl] [-O length]\n"
1849 "\t [-o staplefile] [-P proxy_username] [-p source_port] "
1850 "[-R CAfile]\n"
1851 "\t [-s sourceaddr] [-T keyword] [-V rtable] [-W recvlimit] "
1852 "[-w timeout]\n"
1853 "\t [-X proxy_protocol] [-x proxy_address[:port]] "
1854 "[-Z peercertfile]\n"
1855 "\t [destination] [port]\n");
1856 if (ret)
1857 exit(1);
1858}