Annotation of src/usr.bin/nc/netcat.c, Revision 1.200
1.200 ! tedu 1: /* $OpenBSD: netcat.c,v 1.199 2018/11/29 14:25:06 tedu Exp $ */
1.21 ericj 2: /*
3: * Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
1.133 beck 4: * Copyright (c) 2015 Bob Beck. All rights reserved.
1.7 deraadt 5: *
1.21 ericj 6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
1.7 deraadt 9: *
1.21 ericj 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.
1.7 deraadt 17: *
1.21 ericj 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: */
1.1 deraadt 29:
1.24 ericj 30: /*
31: * Re-written nc(1) for OpenBSD. Original implementation by
1.21 ericj 32: * *Hobbit* <hobbit@avian.org>.
33: */
1.1 deraadt 34:
1.7 deraadt 35: #include <sys/types.h>
1.21 ericj 36: #include <sys/socket.h>
1.113 djm 37: #include <sys/uio.h>
1.42 ericj 38: #include <sys/un.h>
1.21 ericj 39:
1.7 deraadt 40: #include <netinet/in.h>
1.65 markus 41: #include <netinet/tcp.h>
1.83 dtucker 42: #include <netinet/ip.h>
1.21 ericj 43: #include <arpa/telnet.h>
1.29 smart 44:
1.200 ! tedu 45: #include <ctype.h>
1.11 ericj 46: #include <err.h>
1.7 deraadt 47: #include <errno.h>
1.129 tobias 48: #include <limits.h>
1.21 ericj 49: #include <netdb.h>
50: #include <poll.h>
1.129 tobias 51: #include <signal.h>
1.13 ericj 52: #include <stdarg.h>
1.21 ericj 53: #include <stdio.h>
1.1 deraadt 54: #include <stdlib.h>
1.21 ericj 55: #include <string.h>
1.149 bcook 56: #include <time.h>
1.185 tb 57: #include <tls.h>
1.5 art 58: #include <unistd.h>
1.185 tb 59:
1.79 avsm 60: #include "atomicio.h"
1.51 vincent 61:
1.55 fgsch 62: #define PORT_MAX 65535
1.99 jeremy 63: #define UNIX_DG_TMP_SOCKET_SIZE 19
1.31 ericj 64:
1.185 tb 65: #define POLL_STDIN 0
66: #define POLL_NETOUT 1
67: #define POLL_NETIN 2
68: #define POLL_STDOUT 3
69: #define BUFSIZE 16384
1.133 beck 70:
1.189 jsing 71: #define TLS_NOVERIFY (1 << 1)
72: #define TLS_NONAME (1 << 2)
73: #define TLS_CCERT (1 << 3)
74: #define TLS_MUSTSTAPLE (1 << 4)
1.125 tedu 75:
1.21 ericj 76: /* Command Line Options */
1.68 tedu 77: int dflag; /* detached, no stdin */
1.113 djm 78: int Fflag; /* fdpass sock to stdout */
1.88 ray 79: unsigned int iflag; /* Interval Flag */
1.21 ericj 80: int kflag; /* More than one connect */
81: int lflag; /* Bind to local port */
1.111 sthen 82: int Nflag; /* shutdown() network socket */
1.67 jmc 83: int nflag; /* Don't do name look up */
1.86 djm 84: char *Pflag; /* Proxy username */
1.21 ericj 85: char *pflag; /* Localport flag */
86: int rflag; /* Random ports flag */
87: char *sflag; /* Source Address */
88: int tflag; /* Telnet Emulation */
89: int uflag; /* UDP - Default to TCP */
90: int vflag; /* Verbosity */
1.34 jakob 91: int xflag; /* Socks proxy */
1.21 ericj 92: int zflag; /* Port Scan Flag */
1.73 markus 93: int Dflag; /* sodebug */
1.90 djm 94: int Iflag; /* TCP receive buffer size */
95: int Oflag; /* TCP send buffer size */
1.65 markus 96: int Sflag; /* TCP MD5 signature option */
1.83 dtucker 97: int Tflag = -1; /* IP Type of Service */
1.117 sthen 98: int rtableid = -1;
1.21 ericj 99:
1.133 beck 100: int usetls; /* use TLS */
1.199 tedu 101: const char *Cflag; /* Public cert file */
102: const char *Kflag; /* Private key file */
103: const char *oflag; /* OCSP stapling file */
104: const char *Rflag; /* Root CA file */
1.133 beck 105: int tls_cachanged; /* Using non-default CA file */
106: int TLSopt; /* TLS options */
107: char *tls_expectname; /* required name in peer cert */
108: char *tls_expecthash; /* required hash of peer cert */
1.189 jsing 109: char *tls_ciphers; /* TLS ciphers */
110: char *tls_protocols; /* TLS protocols */
1.179 beck 111: FILE *Zflag; /* file to save peer cert */
1.133 beck 112:
1.182 bluhm 113: int recvcount, recvlimit;
1.49 hugh 114: int timeout = -1;
1.21 ericj 115: int family = AF_UNSPEC;
1.63 miod 116: char *portlist[PORT_MAX+1];
1.99 jeremy 117: char *unix_dg_tmp_socket;
1.156 jca 118: int ttl = -1;
119: int minttl = -1;
1.21 ericj 120:
1.40 millert 121: void atelnet(int, unsigned char *, unsigned int);
1.183 bluhm 122: int strtoport(char *portstr, int udp);
1.40 millert 123: void build_ports(char *);
1.185 tb 124: void help(void) __attribute__((noreturn));
1.194 bluhm 125: int local_listen(const char *, const char *, struct addrinfo);
1.133 beck 126: void readwrite(int, struct tls *);
1.113 djm 127: void fdpass(int nfd) __attribute__((noreturn));
1.77 otto 128: int remote_connect(const char *, const char *, struct addrinfo);
1.175 bluhm 129: int timeout_tls(int, struct tls *, int (*)(struct tls *));
1.103 fgsch 130: int timeout_connect(int, const struct sockaddr *, socklen_t);
1.86 djm 131: int socks_connect(const char *, const char *, struct addrinfo,
132: const char *, const char *, struct addrinfo, int, const char *);
1.40 millert 133: int udptest(int);
1.136 deraadt 134: int unix_bind(char *, int);
1.42 ericj 135: int unix_connect(char *);
136: int unix_listen(char *);
1.127 jca 137: void set_common_sockopts(int, int);
1.189 jsing 138: int process_tos_opt(char *, int *);
139: int process_tls_opt(char *, int *);
1.183 bluhm 140: void save_peer_cert(struct tls *_tls_ctx, FILE *_fp);
1.198 bluhm 141: void report_sock(const char *, const struct sockaddr *, socklen_t, char *);
1.183 bluhm 142: void report_tls(struct tls *tls_ctx, char * host);
1.40 millert 143: void usage(int);
1.133 beck 144: ssize_t drainbuf(int, unsigned char *, size_t *, struct tls *);
145: ssize_t fillbuf(int, unsigned char *, size_t *, struct tls *);
146: void tls_setup_client(struct tls *, int, char *);
1.134 deraadt 147: struct tls *tls_setup_server(struct tls *, int, char *);
1.1 deraadt 148:
1.21 ericj 149: int
1.37 jakob 150: main(int argc, char *argv[])
1.21 ericj 151: {
1.154 deraadt 152: int ch, s = -1, ret, socksv;
1.88 ray 153: char *host, *uport;
1.21 ericj 154: struct addrinfo hints;
1.29 smart 155: struct servent *sv;
1.21 ericj 156: socklen_t len;
1.76 hshoexer 157: struct sockaddr_storage cliaddr;
1.183 bluhm 158: char *proxy = NULL, *proxyport = NULL;
1.172 jca 159: const char *errstr;
1.34 jakob 160: struct addrinfo proxyhints;
1.99 jeremy 161: char unix_dg_tmp_socket_buf[UNIX_DG_TMP_SOCKET_SIZE];
1.133 beck 162: struct tls_config *tls_cfg = NULL;
163: struct tls *tls_ctx = NULL;
1.189 jsing 164: uint32_t protocols;
1.11 ericj 165:
1.29 smart 166: ret = 1;
1.46 markus 167: socksv = 5;
1.29 smart 168: host = NULL;
169: uport = NULL;
170: sv = NULL;
1.199 tedu 171: Rflag = tls_default_ca_cert_file();
1.129 tobias 172:
173: signal(SIGPIPE, SIG_IGN);
1.29 smart 174:
1.80 mcbride 175: while ((ch = getopt(argc, argv,
1.182 bluhm 176: "46C:cDde:FH:hI:i:K:klM:m:NnO:o:P:p:R:rSs:T:tUuV:vW:w:X:x:Z:z"))
177: != -1) {
1.21 ericj 178: switch (ch) {
179: case '4':
180: family = AF_INET;
181: break;
182: case '6':
183: family = AF_INET6;
184: break;
1.42 ericj 185: case 'U':
186: family = AF_UNIX;
187: break;
1.46 markus 188: case 'X':
1.75 djm 189: if (strcasecmp(optarg, "connect") == 0)
190: socksv = -1; /* HTTP proxy CONNECT */
191: else if (strcmp(optarg, "4") == 0)
192: socksv = 4; /* SOCKS v.4 */
193: else if (strcmp(optarg, "5") == 0)
194: socksv = 5; /* SOCKS v.5 */
195: else
196: errx(1, "unsupported proxy protocol");
1.46 markus 197: break;
1.133 beck 198: case 'C':
199: Cflag = optarg;
200: break;
201: case 'c':
202: usetls = 1;
203: break;
1.68 tedu 204: case 'd':
205: dflag = 1;
206: break;
1.133 beck 207: case 'e':
208: tls_expectname = optarg;
209: break;
1.113 djm 210: case 'F':
211: Fflag = 1;
212: break;
1.133 beck 213: case 'H':
214: tls_expecthash = optarg;
215: break;
1.21 ericj 216: case 'h':
217: help();
218: break;
219: case 'i':
1.88 ray 220: iflag = strtonum(optarg, 0, UINT_MAX, &errstr);
221: if (errstr)
222: errx(1, "interval %s: %s", errstr, optarg);
1.21 ericj 223: break;
1.133 beck 224: case 'K':
225: Kflag = optarg;
226: break;
1.21 ericj 227: case 'k':
228: kflag = 1;
229: break;
230: case 'l':
231: lflag = 1;
232: break;
1.156 jca 233: case 'M':
234: ttl = strtonum(optarg, 0, 255, &errstr);
235: if (errstr)
236: errx(1, "ttl is %s", errstr);
237: break;
238: case 'm':
239: minttl = strtonum(optarg, 0, 255, &errstr);
240: if (errstr)
241: errx(1, "minttl is %s", errstr);
242: break;
1.111 sthen 243: case 'N':
244: Nflag = 1;
245: break;
1.21 ericj 246: case 'n':
247: nflag = 1;
248: break;
1.86 djm 249: case 'P':
250: Pflag = optarg;
251: break;
1.21 ericj 252: case 'p':
253: pflag = optarg;
254: break;
1.133 beck 255: case 'R':
256: tls_cachanged = 1;
257: Rflag = optarg;
258: break;
1.21 ericj 259: case 'r':
260: rflag = 1;
261: break;
262: case 's':
263: sflag = optarg;
264: break;
265: case 't':
266: tflag = 1;
267: break;
268: case 'u':
269: uflag = 1;
270: break;
1.93 claudio 271: case 'V':
1.117 sthen 272: rtableid = (int)strtonum(optarg, 0,
1.93 claudio 273: RT_TABLEID_MAX, &errstr);
274: if (errstr)
1.98 guenther 275: errx(1, "rtable %s: %s", errstr, optarg);
1.93 claudio 276: break;
1.21 ericj 277: case 'v':
278: vflag = 1;
279: break;
1.182 bluhm 280: case 'W':
281: recvlimit = strtonum(optarg, 1, INT_MAX, &errstr);
282: if (errstr)
283: errx(1, "receive limit %s: %s", errstr, optarg);
284: break;
1.70 deraadt 285: case 'w':
1.88 ray 286: timeout = strtonum(optarg, 0, INT_MAX / 1000, &errstr);
287: if (errstr)
288: errx(1, "timeout %s: %s", errstr, optarg);
1.49 hugh 289: timeout *= 1000;
1.21 ericj 290: break;
1.34 jakob 291: case 'x':
292: xflag = 1;
1.64 deraadt 293: if ((proxy = strdup(optarg)) == NULL)
294: err(1, NULL);
1.34 jakob 295: break;
1.179 beck 296: case 'Z':
297: if (strcmp(optarg, "-") == 0)
298: Zflag = stderr;
299: else if ((Zflag = fopen(optarg, "w")) == NULL)
300: err(1, "can't open %s", optarg);
301: break;
1.21 ericj 302: case 'z':
303: zflag = 1;
304: break;
1.73 markus 305: case 'D':
306: Dflag = 1;
307: break;
1.90 djm 308: case 'I':
309: Iflag = strtonum(optarg, 1, 65536 << 14, &errstr);
310: if (errstr != NULL)
311: errx(1, "TCP receive window %s: %s",
312: errstr, optarg);
313: break;
314: case 'O':
315: Oflag = strtonum(optarg, 1, 65536 << 14, &errstr);
316: if (errstr != NULL)
317: errx(1, "TCP send window %s: %s",
318: errstr, optarg);
319: break;
1.168 beck 320: case 'o':
321: oflag = optarg;
322: break;
1.65 markus 323: case 'S':
324: Sflag = 1;
325: break;
1.83 dtucker 326: case 'T':
1.102 haesbaer 327: errstr = NULL;
328: errno = 0;
1.189 jsing 329: if (process_tls_opt(optarg, &TLSopt))
1.102 haesbaer 330: break;
1.189 jsing 331: if (process_tos_opt(optarg, &Tflag))
1.133 beck 332: break;
1.102 haesbaer 333: if (strlen(optarg) > 1 && optarg[0] == '0' &&
334: optarg[1] == 'x')
335: Tflag = (int)strtol(optarg, NULL, 16);
336: else
337: Tflag = (int)strtonum(optarg, 0, 255,
338: &errstr);
339: if (Tflag < 0 || Tflag > 255 || errstr || errno)
1.133 beck 340: errx(1, "illegal tos/tls value %s", optarg);
1.83 dtucker 341: break;
1.21 ericj 342: default:
343: usage(1);
344: }
345: }
346: argc -= optind;
347: argv += optind;
1.11 ericj 348:
1.143 deraadt 349: if (rtableid >= 0)
1.142 benno 350: if (setrtable(rtableid) == -1)
351: err(1, "setrtable");
1.143 deraadt 352:
1.191 beck 353: /* Cruft to make sure options are clean, and used properly. */
354: if (argv[0] && !argv[1] && family == AF_UNIX) {
355: host = argv[0];
356: uport = NULL;
357: } else if (argv[0] && !argv[1]) {
358: if (!lflag)
359: usage(1);
360: uport = argv[0];
361: host = NULL;
362: } else if (argv[0] && argv[1]) {
363: host = argv[0];
364: uport = argv[1];
365: } else
366: usage(1);
1.192 deraadt 367:
368: if (usetls) {
369: if (Cflag && unveil(Cflag, "r") == -1)
370: err(1, "unveil");
371: if (unveil(Rflag, "r") == -1)
372: err(1, "unveil");
373: if (Kflag && unveil(Kflag, "r") == -1)
374: err(1, "unveil");
375: if (oflag && unveil(oflag, "r") == -1)
376: err(1, "unveil");
377: } else {
378: if (family == AF_UNIX) {
379: if (unveil(host, "rwc") == -1)
380: err(1, "unveil");
381: if (uflag && !lflag) {
382: if (unveil(sflag ? sflag : "/tmp", "rwc") == -1)
383: err(1, "unveil");
384: }
385: } else {
386: if (unveil("/", "") == -1)
387: err(1, "unveil");
388: }
389: }
1.191 beck 390:
1.142 benno 391: if (family == AF_UNIX) {
1.140 beck 392: if (pledge("stdio rpath wpath cpath tmppath unix", NULL) == -1)
393: err(1, "pledge");
1.186 tb 394: } else if (Fflag && Pflag) {
395: if (pledge("stdio inet dns sendfd tty", NULL) == -1)
396: err(1, "pledge");
1.191 beck 397: } else if (Fflag) {
1.186 tb 398: if (pledge("stdio inet dns sendfd", NULL) == -1)
1.152 beck 399: err(1, "pledge");
1.184 tb 400: } else if (Pflag && usetls) {
401: if (pledge("stdio rpath inet dns tty", NULL) == -1)
402: err(1, "pledge");
1.152 beck 403: } else if (Pflag) {
404: if (pledge("stdio inet dns tty", NULL) == -1)
1.140 beck 405: err(1, "pledge");
1.143 deraadt 406: } else if (usetls) {
1.140 beck 407: if (pledge("stdio rpath inet dns", NULL) == -1)
408: err(1, "pledge");
1.143 deraadt 409: } else if (pledge("stdio inet dns", NULL) == -1)
1.140 beck 410: err(1, "pledge");
1.1 deraadt 411:
1.21 ericj 412: if (lflag && sflag)
413: errx(1, "cannot use -s and -l");
414: if (lflag && pflag)
415: errx(1, "cannot use -p and -l");
416: if (lflag && zflag)
1.32 ericj 417: errx(1, "cannot use -z and -l");
1.21 ericj 418: if (!lflag && kflag)
1.32 ericj 419: errx(1, "must use -l with -k");
1.133 beck 420: if (uflag && usetls)
421: errx(1, "cannot use -c and -u");
422: if ((family == AF_UNIX) && usetls)
423: errx(1, "cannot use -c and -U");
1.140 beck 424: if ((family == AF_UNIX) && Fflag)
425: errx(1, "cannot use -F and -U");
426: if (Fflag && usetls)
427: errx(1, "cannot use -c and -F");
1.133 beck 428: if (TLSopt && !usetls)
429: errx(1, "you must specify -c to use TLS options");
430: if (Cflag && !usetls)
431: errx(1, "you must specify -c to use -C");
432: if (Kflag && !usetls)
433: errx(1, "you must specify -c to use -K");
1.179 beck 434: if (Zflag && !usetls)
435: errx(1, "you must specify -c to use -Z");
1.168 beck 436: if (oflag && !Cflag)
437: errx(1, "you must specify -C to use -o");
1.133 beck 438: if (tls_cachanged && !usetls)
439: errx(1, "you must specify -c to use -R");
440: if (tls_expecthash && !usetls)
441: errx(1, "you must specify -c to use -H");
442: if (tls_expectname && !usetls)
443: errx(1, "you must specify -c to use -e");
1.21 ericj 444:
1.99 jeremy 445: /* Get name of temporary socket for unix datagram client */
446: if ((family == AF_UNIX) && uflag && !lflag) {
447: if (sflag) {
448: unix_dg_tmp_socket = sflag;
449: } else {
450: strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",
1.136 deraadt 451: UNIX_DG_TMP_SOCKET_SIZE);
1.99 jeremy 452: if (mktemp(unix_dg_tmp_socket_buf) == NULL)
453: err(1, "mktemp");
454: unix_dg_tmp_socket = unix_dg_tmp_socket_buf;
455: }
456: }
457:
1.67 jmc 458: /* Initialize addrinfo structure. */
1.42 ericj 459: if (family != AF_UNIX) {
460: memset(&hints, 0, sizeof(struct addrinfo));
461: hints.ai_family = family;
462: hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
463: hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
464: if (nflag)
465: hints.ai_flags |= AI_NUMERICHOST;
466: }
1.1 deraadt 467:
1.34 jakob 468: if (xflag) {
469: if (uflag)
470: errx(1, "no proxy support for UDP mode");
471:
472: if (lflag)
473: errx(1, "no proxy support for listen");
474:
1.42 ericj 475: if (family == AF_UNIX)
476: errx(1, "no proxy support for unix sockets");
477:
1.34 jakob 478: if (sflag)
479: errx(1, "no proxy support for local source address");
480:
1.172 jca 481: if (*proxy == '[') {
482: ++proxy;
483: proxyport = strchr(proxy, ']');
484: if (proxyport == NULL)
485: errx(1, "missing closing bracket in proxy");
486: *proxyport++ = '\0';
487: if (*proxyport == '\0')
488: /* Use default proxy port. */
489: proxyport = NULL;
490: else {
491: if (*proxyport == ':')
492: ++proxyport;
493: else
494: errx(1, "garbage proxy port delimiter");
495: }
496: } else {
497: proxyport = strrchr(proxy, ':');
498: if (proxyport != NULL)
499: *proxyport++ = '\0';
500: }
1.34 jakob 501:
502: memset(&proxyhints, 0, sizeof(struct addrinfo));
503: proxyhints.ai_family = family;
504: proxyhints.ai_socktype = SOCK_STREAM;
505: proxyhints.ai_protocol = IPPROTO_TCP;
506: if (nflag)
507: proxyhints.ai_flags |= AI_NUMERICHOST;
508: }
509:
1.133 beck 510: if (usetls) {
511: if ((tls_cfg = tls_config_new()) == NULL)
512: errx(1, "unable to allocate TLS config");
1.162 jsing 513: if (Rflag && tls_config_set_ca_file(tls_cfg, Rflag) == -1)
514: errx(1, "%s", tls_config_error(tls_cfg));
515: if (Cflag && tls_config_set_cert_file(tls_cfg, Cflag) == -1)
516: errx(1, "%s", tls_config_error(tls_cfg));
517: if (Kflag && tls_config_set_key_file(tls_cfg, Kflag) == -1)
1.168 beck 518: errx(1, "%s", tls_config_error(tls_cfg));
519: if (oflag && tls_config_set_ocsp_staple_file(tls_cfg, oflag) == -1)
1.162 jsing 520: errx(1, "%s", tls_config_error(tls_cfg));
1.189 jsing 521: if (tls_config_parse_protocols(&protocols, tls_protocols) == -1)
522: errx(1, "invalid TLS protocols `%s'", tls_protocols);
523: if (tls_config_set_protocols(tls_cfg, protocols) == -1)
524: errx(1, "%s", tls_config_error(tls_cfg));
525: if (tls_config_set_ciphers(tls_cfg, tls_ciphers) == -1)
526: errx(1, "%s", tls_config_error(tls_cfg));
1.133 beck 527: if (!lflag && (TLSopt & TLS_CCERT))
528: errx(1, "clientcert is only valid with -l");
529: if (TLSopt & TLS_NONAME)
530: tls_config_insecure_noverifyname(tls_cfg);
531: if (TLSopt & TLS_NOVERIFY) {
532: if (tls_expecthash != NULL)
1.186 tb 533: errx(1, "-H and -T noverify may not be used "
534: "together");
1.133 beck 535: tls_config_insecure_noverifycert(tls_cfg);
536: }
1.167 beck 537: if (TLSopt & TLS_MUSTSTAPLE)
538: tls_config_ocsp_require_stapling(tls_cfg);
1.162 jsing 539:
540: if (Pflag) {
541: if (pledge("stdio inet dns tty", NULL) == -1)
542: err(1, "pledge");
543: } else if (pledge("stdio inet dns", NULL) == -1)
544: err(1, "pledge");
1.133 beck 545: }
1.21 ericj 546: if (lflag) {
1.27 ericj 547: ret = 0;
1.1 deraadt 548:
1.99 jeremy 549: if (family == AF_UNIX) {
550: if (uflag)
1.136 deraadt 551: s = unix_bind(host, 0);
1.99 jeremy 552: else
553: s = unix_listen(host);
554: }
1.42 ericj 555:
1.133 beck 556: if (usetls) {
557: tls_config_verify_client_optional(tls_cfg);
558: if ((tls_ctx = tls_server()) == NULL)
559: errx(1, "tls server creation failed");
560: if (tls_configure(tls_ctx, tls_cfg) == -1)
561: errx(1, "tls configuration failed (%s)",
562: tls_error(tls_ctx));
563: }
1.67 jmc 564: /* Allow only one connection at a time, but stay alive. */
1.21 ericj 565: for (;;) {
1.193 bluhm 566: if (family != AF_UNIX) {
567: if (s != -1)
568: close(s);
1.42 ericj 569: s = local_listen(host, uport, hints);
1.193 bluhm 570: }
1.42 ericj 571: if (s < 0)
1.30 smart 572: err(1, NULL);
1.181 deraadt 573: if (uflag && kflag) {
574: /*
575: * For UDP and -k, don't connect the socket,
576: * let it receive datagrams from multiple
577: * socket pairs.
578: */
1.133 beck 579: readwrite(s, NULL);
1.181 deraadt 580: } else if (uflag && !kflag) {
581: /*
582: * For UDP and not -k, we will use recvfrom()
583: * initially to wait for a caller, then use
584: * the regular functions to talk to the caller.
585: */
1.188 bluhm 586: int rv;
587: char buf[2048];
1.21 ericj 588: struct sockaddr_storage z;
589:
590: len = sizeof(z);
1.188 bluhm 591: rv = recvfrom(s, buf, sizeof(buf), MSG_PEEK,
1.37 jakob 592: (struct sockaddr *)&z, &len);
1.23 ericj 593: if (rv < 0)
1.57 stevesk 594: err(1, "recvfrom");
1.21 ericj 595:
1.37 jakob 596: rv = connect(s, (struct sockaddr *)&z, len);
1.23 ericj 597: if (rv < 0)
1.57 stevesk 598: err(1, "connect");
1.1 deraadt 599:
1.108 haesbaer 600: if (vflag)
1.198 bluhm 601: report_sock("Connection received",
602: (struct sockaddr *)&z, len, NULL);
1.108 haesbaer 603:
1.133 beck 604: readwrite(s, NULL);
1.21 ericj 605: } else {
1.195 bluhm 606: struct tls *tls_cctx = NULL;
607: int connfd;
608:
1.78 otto 609: len = sizeof(cliaddr);
1.132 bluhm 610: connfd = accept4(s, (struct sockaddr *)&cliaddr,
611: &len, SOCK_NONBLOCK);
1.110 deraadt 612: if (connfd == -1) {
613: /* For now, all errnos are fatal */
1.125 tedu 614: err(1, "accept");
1.110 deraadt 615: }
1.108 haesbaer 616: if (vflag)
1.198 bluhm 617: report_sock("Connection received",
618: (struct sockaddr *)&cliaddr, len,
1.151 beck 619: family == AF_UNIX ? host : NULL);
1.133 beck 620: if ((usetls) &&
1.134 deraadt 621: (tls_cctx = tls_setup_server(tls_ctx, connfd, host)))
1.133 beck 622: readwrite(connfd, tls_cctx);
623: if (!usetls)
624: readwrite(connfd, NULL);
1.195 bluhm 625: if (tls_cctx)
1.175 bluhm 626: timeout_tls(s, tls_cctx, tls_close);
1.99 jeremy 627: close(connfd);
1.195 bluhm 628: tls_free(tls_cctx);
1.21 ericj 629: }
1.193 bluhm 630: if (family == AF_UNIX && uflag) {
1.99 jeremy 631: if (connect(s, NULL, 0) < 0)
632: err(1, "connect");
633: }
1.27 ericj 634:
1.21 ericj 635: if (!kflag)
636: break;
1.11 ericj 637: }
1.42 ericj 638: } else if (family == AF_UNIX) {
639: ret = 0;
640:
1.177 bluhm 641: if ((s = unix_connect(host)) > 0) {
642: if (!zflag)
643: readwrite(s, NULL);
1.42 ericj 644: close(s);
1.196 dlg 645: } else {
646: warn("%s", host);
1.42 ericj 647: ret = 1;
1.196 dlg 648: }
1.42 ericj 649:
1.99 jeremy 650: if (uflag)
651: unlink(unix_dg_tmp_socket);
1.185 tb 652: return ret;
1.42 ericj 653:
1.21 ericj 654: } else {
655: int i = 0;
1.6 deraadt 656:
1.67 jmc 657: /* Construct the portlist[] array. */
1.21 ericj 658: build_ports(uport);
1.1 deraadt 659:
1.67 jmc 660: /* Cycle through portlist, connecting to each port. */
1.154 deraadt 661: for (s = -1, i = 0; portlist[i] != NULL; i++) {
662: if (s != -1)
1.21 ericj 663: close(s);
1.195 bluhm 664: tls_free(tls_ctx);
665: tls_ctx = NULL;
1.34 jakob 666:
1.133 beck 667: if (usetls) {
668: if ((tls_ctx = tls_client()) == NULL)
669: errx(1, "tls client creation failed");
670: if (tls_configure(tls_ctx, tls_cfg) == -1)
671: errx(1, "tls configuration failed (%s)",
672: tls_error(tls_ctx));
673: }
1.34 jakob 674: if (xflag)
675: s = socks_connect(host, portlist[i], hints,
1.172 jca 676: proxy, proxyport, proxyhints, socksv,
1.86 djm 677: Pflag);
1.34 jakob 678: else
679: s = remote_connect(host, portlist[i], hints);
680:
1.154 deraadt 681: if (s == -1)
1.21 ericj 682: continue;
1.1 deraadt 683:
1.21 ericj 684: ret = 0;
685: if (vflag || zflag) {
1.67 jmc 686: /* For UDP, make sure we are connected. */
1.21 ericj 687: if (uflag) {
1.50 vincent 688: if (udptest(s) == -1) {
1.21 ericj 689: ret = 1;
690: continue;
691: }
692: }
1.1 deraadt 693:
1.67 jmc 694: /* Don't look up port if -n. */
1.21 ericj 695: if (nflag)
696: sv = NULL;
697: else {
698: sv = getservbyport(
1.37 jakob 699: ntohs(atoi(portlist[i])),
700: uflag ? "udp" : "tcp");
1.21 ericj 701: }
1.50 vincent 702:
1.94 mpf 703: fprintf(stderr,
704: "Connection to %s %s port [%s/%s] "
705: "succeeded!\n", host, portlist[i],
706: uflag ? "udp" : "tcp",
1.37 jakob 707: sv ? sv->s_name : "*");
1.21 ericj 708: }
1.113 djm 709: if (Fflag)
710: fdpass(s);
1.133 beck 711: else {
712: if (usetls)
713: tls_setup_client(tls_ctx, s, host);
714: if (!zflag)
715: readwrite(s, tls_ctx);
1.195 bluhm 716: if (tls_ctx)
1.175 bluhm 717: timeout_tls(s, tls_ctx, tls_close);
1.133 beck 718: }
1.7 deraadt 719: }
1.11 ericj 720: }
1.1 deraadt 721:
1.154 deraadt 722: if (s != -1)
1.21 ericj 723: close(s);
1.195 bluhm 724: tls_free(tls_ctx);
1.133 beck 725: tls_config_free(tls_cfg);
726:
1.185 tb 727: return ret;
1.7 deraadt 728: }
1.1 deraadt 729:
1.11 ericj 730: /*
1.99 jeremy 731: * unix_bind()
732: * Returns a unix socket bound to the given path
1.42 ericj 733: */
734: int
1.136 deraadt 735: unix_bind(char *path, int flags)
1.42 ericj 736: {
1.144 bcook 737: struct sockaddr_un s_un;
1.155 deraadt 738: int s, save_errno;
1.42 ericj 739:
1.99 jeremy 740: /* Create unix domain socket. */
1.136 deraadt 741: if ((s = socket(AF_UNIX, flags | (uflag ? SOCK_DGRAM : SOCK_STREAM),
742: 0)) < 0)
1.185 tb 743: return -1;
1.42 ericj 744:
1.144 bcook 745: memset(&s_un, 0, sizeof(struct sockaddr_un));
746: s_un.sun_family = AF_UNIX;
1.60 avsm 747:
1.144 bcook 748: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
749: sizeof(s_un.sun_path)) {
1.60 avsm 750: close(s);
751: errno = ENAMETOOLONG;
1.185 tb 752: return -1;
1.60 avsm 753: }
1.99 jeremy 754:
1.144 bcook 755: if (bind(s, (struct sockaddr *)&s_un, sizeof(s_un)) < 0) {
1.155 deraadt 756: save_errno = errno;
1.50 vincent 757: close(s);
1.155 deraadt 758: errno = save_errno;
1.185 tb 759: return -1;
1.42 ericj 760: }
1.198 bluhm 761: if (vflag)
762: report_sock("Bound", NULL, 0, path);
1.185 tb 763:
764: return s;
1.42 ericj 765: }
766:
1.173 bluhm 767: int
1.175 bluhm 768: timeout_tls(int s, struct tls *tls_ctx, int (*func)(struct tls *))
1.173 bluhm 769: {
770: struct pollfd pfd;
771: int ret;
772:
1.175 bluhm 773: while ((ret = (*func)(tls_ctx)) != 0) {
1.173 bluhm 774: if (ret == TLS_WANT_POLLIN)
775: pfd.events = POLLIN;
776: else if (ret == TLS_WANT_POLLOUT)
777: pfd.events = POLLOUT;
778: else
779: break;
780: pfd.fd = s;
781: if ((ret = poll(&pfd, 1, timeout)) == 1)
782: continue;
783: else if (ret == 0) {
784: errno = ETIMEDOUT;
785: ret = -1;
786: break;
787: } else
788: err(1, "poll failed");
789: }
790:
1.185 tb 791: return ret;
1.173 bluhm 792: }
793:
1.133 beck 794: void
795: tls_setup_client(struct tls *tls_ctx, int s, char *host)
796: {
1.173 bluhm 797: const char *errstr;
1.136 deraadt 798:
1.133 beck 799: if (tls_connect_socket(tls_ctx, s,
800: tls_expectname ? tls_expectname : host) == -1) {
801: errx(1, "tls connection failed (%s)",
802: tls_error(tls_ctx));
803: }
1.175 bluhm 804: if (timeout_tls(s, tls_ctx, tls_handshake) == -1) {
1.173 bluhm 805: if ((errstr = tls_error(tls_ctx)) == NULL)
806: errstr = strerror(errno);
807: errx(1, "tls handshake failed (%s)", errstr);
808: }
1.133 beck 809: if (vflag)
1.183 bluhm 810: report_tls(tls_ctx, host);
1.137 beck 811: if (tls_expecthash && tls_peer_cert_hash(tls_ctx) &&
812: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 813: errx(1, "peer certificate is not %s", tls_expecthash);
1.179 beck 814: if (Zflag) {
815: save_peer_cert(tls_ctx, Zflag);
816: if (Zflag != stderr && (fclose(Zflag) != 0))
817: err(1, "fclose failed saving peer cert");
818: }
1.133 beck 819: }
1.141 deraadt 820:
1.133 beck 821: struct tls *
822: tls_setup_server(struct tls *tls_ctx, int connfd, char *host)
823: {
824: struct tls *tls_cctx;
1.173 bluhm 825: const char *errstr;
1.136 deraadt 826:
1.173 bluhm 827: if (tls_accept_socket(tls_ctx, &tls_cctx, connfd) == -1) {
828: warnx("tls accept failed (%s)", tls_error(tls_ctx));
1.175 bluhm 829: } else if (timeout_tls(connfd, tls_cctx, tls_handshake) == -1) {
1.178 bluhm 830: if ((errstr = tls_error(tls_cctx)) == NULL)
1.173 bluhm 831: errstr = strerror(errno);
832: warnx("tls handshake failed (%s)", errstr);
1.133 beck 833: } else {
834: int gotcert = tls_peer_cert_provided(tls_cctx);
1.136 deraadt 835:
1.133 beck 836: if (vflag && gotcert)
1.183 bluhm 837: report_tls(tls_cctx, host);
1.133 beck 838: if ((TLSopt & TLS_CCERT) && !gotcert)
839: warnx("No client certificate provided");
1.137 beck 840: else if (gotcert && tls_peer_cert_hash(tls_ctx) && tls_expecthash &&
841: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 842: warnx("peer certificate is not %s", tls_expecthash);
843: else if (gotcert && tls_expectname &&
1.134 deraadt 844: (!tls_peer_cert_contains_name(tls_cctx, tls_expectname)))
1.133 beck 845: warnx("name (%s) not found in client cert",
846: tls_expectname);
847: else {
848: return tls_cctx;
849: }
850: }
851: return NULL;
852: }
1.141 deraadt 853:
1.42 ericj 854: /*
1.99 jeremy 855: * unix_connect()
856: * Returns a socket connected to a local unix socket. Returns -1 on failure.
1.42 ericj 857: */
858: int
1.99 jeremy 859: unix_connect(char *path)
1.42 ericj 860: {
1.144 bcook 861: struct sockaddr_un s_un;
1.155 deraadt 862: int s, save_errno;
1.42 ericj 863:
1.99 jeremy 864: if (uflag) {
1.136 deraadt 865: if ((s = unix_bind(unix_dg_tmp_socket, SOCK_CLOEXEC)) < 0)
1.185 tb 866: return -1;
1.99 jeremy 867: } else {
1.136 deraadt 868: if ((s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0)) < 0)
1.185 tb 869: return -1;
1.99 jeremy 870: }
1.42 ericj 871:
1.144 bcook 872: memset(&s_un, 0, sizeof(struct sockaddr_un));
873: s_un.sun_family = AF_UNIX;
1.60 avsm 874:
1.144 bcook 875: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
876: sizeof(s_un.sun_path)) {
1.60 avsm 877: close(s);
878: errno = ENAMETOOLONG;
1.185 tb 879: return -1;
1.60 avsm 880: }
1.144 bcook 881: if (connect(s, (struct sockaddr *)&s_un, sizeof(s_un)) < 0) {
1.155 deraadt 882: save_errno = errno;
1.42 ericj 883: close(s);
1.155 deraadt 884: errno = save_errno;
1.185 tb 885: return -1;
1.42 ericj 886: }
1.185 tb 887: return s;
1.99 jeremy 888:
889: }
890:
891: /*
892: * unix_listen()
893: * Create a unix domain socket, and listen on it.
894: */
895: int
896: unix_listen(char *path)
897: {
898: int s;
1.198 bluhm 899:
1.136 deraadt 900: if ((s = unix_bind(path, 0)) < 0)
1.185 tb 901: return -1;
1.42 ericj 902: if (listen(s, 5) < 0) {
903: close(s);
1.185 tb 904: return -1;
1.42 ericj 905: }
1.198 bluhm 906: if (vflag)
907: report_sock("Listening", NULL, 0, path);
908:
1.185 tb 909: return s;
1.42 ericj 910: }
911:
912: /*
1.21 ericj 913: * remote_connect()
1.67 jmc 914: * Returns a socket connected to a remote host. Properly binds to a local
915: * port or source address if needed. Returns -1 on failure.
1.11 ericj 916: */
1.21 ericj 917: int
1.77 otto 918: remote_connect(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 919: {
920: struct addrinfo *res, *res0;
1.163 bcook 921: int s = -1, error, on = 1, save_errno;
1.21 ericj 922:
1.161 halex 923: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.176 jca 924: errx(1, "getaddrinfo for host \"%s\" port %s: %s", host,
925: port, gai_strerror(error));
1.21 ericj 926:
1.161 halex 927: for (res = res0; res; res = res->ai_next) {
928: if ((s = socket(res->ai_family, res->ai_socktype |
929: SOCK_NONBLOCK, res->ai_protocol)) < 0)
1.21 ericj 930: continue;
931:
1.67 jmc 932: /* Bind to a local port or source address if specified. */
1.21 ericj 933: if (sflag || pflag) {
934: struct addrinfo ahints, *ares;
1.6 deraadt 935:
1.91 markus 936: /* try SO_BINDANY, but don't insist */
937: setsockopt(s, SOL_SOCKET, SO_BINDANY, &on, sizeof(on));
1.21 ericj 938: memset(&ahints, 0, sizeof(struct addrinfo));
1.161 halex 939: ahints.ai_family = res->ai_family;
1.21 ericj 940: ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
941: ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
1.25 ericj 942: ahints.ai_flags = AI_PASSIVE;
1.38 jakob 943: if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
1.56 stevesk 944: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.21 ericj 945:
946: if (bind(s, (struct sockaddr *)ares->ai_addr,
1.62 millert 947: ares->ai_addrlen) < 0)
1.119 guenther 948: err(1, "bind failed");
1.21 ericj 949: freeaddrinfo(ares);
1.6 deraadt 950: }
1.81 marius 951:
1.161 halex 952: set_common_sockopts(s, res->ai_family);
1.6 deraadt 953:
1.161 halex 954: if (timeout_connect(s, res->ai_addr, res->ai_addrlen) == 0)
1.6 deraadt 955: break;
1.143 deraadt 956: if (vflag)
1.71 mcbride 957: warn("connect to %s port %s (%s) failed", host, port,
958: uflag ? "udp" : "tcp");
1.34 jakob 959:
1.155 deraadt 960: save_errno = errno;
1.21 ericj 961: close(s);
1.155 deraadt 962: errno = save_errno;
1.21 ericj 963: s = -1;
1.161 halex 964: }
1.21 ericj 965:
1.161 halex 966: freeaddrinfo(res0);
1.1 deraadt 967:
1.185 tb 968: return s;
1.103 fgsch 969: }
970:
971: int
972: timeout_connect(int s, const struct sockaddr *name, socklen_t namelen)
973: {
974: struct pollfd pfd;
975: socklen_t optlen;
1.132 bluhm 976: int optval;
1.103 fgsch 977: int ret;
978:
979: if ((ret = connect(s, name, namelen)) != 0 && errno == EINPROGRESS) {
980: pfd.fd = s;
981: pfd.events = POLLOUT;
982: if ((ret = poll(&pfd, 1, timeout)) == 1) {
983: optlen = sizeof(optval);
984: if ((ret = getsockopt(s, SOL_SOCKET, SO_ERROR,
985: &optval, &optlen)) == 0) {
986: errno = optval;
987: ret = optval == 0 ? 0 : -1;
988: }
989: } else if (ret == 0) {
990: errno = ETIMEDOUT;
991: ret = -1;
992: } else
993: err(1, "poll failed");
994: }
995:
1.185 tb 996: return ret;
1.7 deraadt 997: }
1.1 deraadt 998:
1.11 ericj 999: /*
1.21 ericj 1000: * local_listen()
1.67 jmc 1001: * Returns a socket listening on a local port, binds to specified source
1002: * address. Returns -1 on failure.
1.11 ericj 1003: */
1.21 ericj 1004: int
1.194 bluhm 1005: local_listen(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 1006: {
1007: struct addrinfo *res, *res0;
1.163 bcook 1008: int s = -1, ret, x = 1, save_errno;
1.21 ericj 1009: int error;
1.6 deraadt 1010:
1.67 jmc 1011: /* Allow nodename to be null. */
1.21 ericj 1012: hints.ai_flags |= AI_PASSIVE;
1.7 deraadt 1013:
1.21 ericj 1014: /*
1015: * In the case of binding to a wildcard address
1016: * default to binding to an ipv4 address.
1017: */
1018: if (host == NULL && hints.ai_family == AF_UNSPEC)
1019: hints.ai_family = AF_INET;
1.1 deraadt 1020:
1.161 halex 1021: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.70 deraadt 1022: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.14 ericj 1023:
1.161 halex 1024: for (res = res0; res; res = res->ai_next) {
1025: if ((s = socket(res->ai_family, res->ai_socktype,
1026: res->ai_protocol)) < 0)
1.21 ericj 1027: continue;
1.93 claudio 1028:
1.21 ericj 1029: ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
1030: if (ret == -1)
1.30 smart 1031: err(1, NULL);
1.81 marius 1032:
1.161 halex 1033: set_common_sockopts(s, res->ai_family);
1.1 deraadt 1034:
1.161 halex 1035: if (bind(s, (struct sockaddr *)res->ai_addr,
1036: res->ai_addrlen) == 0)
1.21 ericj 1037: break;
1.1 deraadt 1038:
1.155 deraadt 1039: save_errno = errno;
1.21 ericj 1040: close(s);
1.155 deraadt 1041: errno = save_errno;
1.21 ericj 1042: s = -1;
1.161 halex 1043: }
1.1 deraadt 1044:
1.47 ericj 1045: if (!uflag && s != -1) {
1.21 ericj 1046: if (listen(s, 1) < 0)
1.57 stevesk 1047: err(1, "listen");
1.12 ericj 1048: }
1.198 bluhm 1049: if (vflag && s != -1) {
1050: struct sockaddr_storage ss;
1051: socklen_t len;
1052:
1053: len = sizeof(ss);
1054: if (getsockname(s, (struct sockaddr *)&ss, &len) == -1)
1055: err(1, "getsockname");
1056: report_sock(uflag ? "Bound" : "Listening",
1057: (struct sockaddr *)&ss, len, NULL);
1058: }
1.1 deraadt 1059:
1.161 halex 1060: freeaddrinfo(res0);
1.1 deraadt 1061:
1.185 tb 1062: return s;
1.7 deraadt 1063: }
1064:
1.11 ericj 1065: /*
1.21 ericj 1066: * readwrite()
1067: * Loop that polls on the network file descriptor and stdin.
1.11 ericj 1068: */
1.21 ericj 1069: void
1.133 beck 1070: readwrite(int net_fd, struct tls *tls_ctx)
1.6 deraadt 1071: {
1.125 tedu 1072: struct pollfd pfd[4];
1073: int stdin_fd = STDIN_FILENO;
1074: int stdout_fd = STDOUT_FILENO;
1075: unsigned char netinbuf[BUFSIZE];
1076: size_t netinbufpos = 0;
1077: unsigned char stdinbuf[BUFSIZE];
1078: size_t stdinbufpos = 0;
1.130 chl 1079: int n, num_fds;
1.125 tedu 1080: ssize_t ret;
1081:
1082: /* don't read from stdin if requested */
1083: if (dflag)
1084: stdin_fd = -1;
1085:
1086: /* stdin */
1087: pfd[POLL_STDIN].fd = stdin_fd;
1088: pfd[POLL_STDIN].events = POLLIN;
1089:
1090: /* network out */
1091: pfd[POLL_NETOUT].fd = net_fd;
1092: pfd[POLL_NETOUT].events = 0;
1093:
1094: /* network in */
1095: pfd[POLL_NETIN].fd = net_fd;
1096: pfd[POLL_NETIN].events = POLLIN;
1097:
1098: /* stdout */
1099: pfd[POLL_STDOUT].fd = stdout_fd;
1100: pfd[POLL_STDOUT].events = 0;
1101:
1102: while (1) {
1103: /* both inputs are gone, buffers are empty, we are done */
1.134 deraadt 1104: if (pfd[POLL_STDIN].fd == -1 && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1105: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1106: return;
1107: /* both outputs are gone, we can't continue */
1.174 bluhm 1108: if (pfd[POLL_NETOUT].fd == -1 && pfd[POLL_STDOUT].fd == -1)
1.125 tedu 1109: return;
1110: /* listen and net in gone, queues empty, done */
1.134 deraadt 1111: if (lflag && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1112: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1113: return;
1.21 ericj 1114:
1.125 tedu 1115: /* help says -i is for "wait between lines sent". We read and
1116: * write arbitrary amounts of data, and we don't want to start
1117: * scanning for newlines, so this is as good as it gets */
1.21 ericj 1118: if (iflag)
1119: sleep(iflag);
1120:
1.125 tedu 1121: /* poll */
1122: num_fds = poll(pfd, 4, timeout);
1123:
1124: /* treat poll errors */
1.174 bluhm 1125: if (num_fds == -1)
1.125 tedu 1126: err(1, "polling error");
1.49 hugh 1127:
1.125 tedu 1128: /* timeout happened */
1129: if (num_fds == 0)
1.49 hugh 1130: return;
1.21 ericj 1131:
1.125 tedu 1132: /* treat socket error conditions */
1133: for (n = 0; n < 4; n++) {
1134: if (pfd[n].revents & (POLLERR|POLLNVAL)) {
1135: pfd[n].fd = -1;
1.6 deraadt 1136: }
1.21 ericj 1137: }
1.125 tedu 1138: /* reading is possible after HUP */
1139: if (pfd[POLL_STDIN].events & POLLIN &&
1140: pfd[POLL_STDIN].revents & POLLHUP &&
1.134 deraadt 1141: !(pfd[POLL_STDIN].revents & POLLIN))
1142: pfd[POLL_STDIN].fd = -1;
1.125 tedu 1143:
1144: if (pfd[POLL_NETIN].events & POLLIN &&
1145: pfd[POLL_NETIN].revents & POLLHUP &&
1.134 deraadt 1146: !(pfd[POLL_NETIN].revents & POLLIN))
1147: pfd[POLL_NETIN].fd = -1;
1.125 tedu 1148:
1149: if (pfd[POLL_NETOUT].revents & POLLHUP) {
1150: if (Nflag)
1151: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1152: pfd[POLL_NETOUT].fd = -1;
1153: }
1154: /* if HUP, stop watching stdout */
1155: if (pfd[POLL_STDOUT].revents & POLLHUP)
1156: pfd[POLL_STDOUT].fd = -1;
1157: /* if no net out, stop watching stdin */
1158: if (pfd[POLL_NETOUT].fd == -1)
1159: pfd[POLL_STDIN].fd = -1;
1160: /* if no stdout, stop watching net in */
1161: if (pfd[POLL_STDOUT].fd == -1) {
1162: if (pfd[POLL_NETIN].fd != -1)
1163: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1164: pfd[POLL_NETIN].fd = -1;
1165: }
1.21 ericj 1166:
1.125 tedu 1167: /* try to read from stdin */
1168: if (pfd[POLL_STDIN].revents & POLLIN && stdinbufpos < BUFSIZE) {
1169: ret = fillbuf(pfd[POLL_STDIN].fd, stdinbuf,
1.133 beck 1170: &stdinbufpos, NULL);
1171: if (ret == TLS_WANT_POLLIN)
1172: pfd[POLL_STDIN].events = POLLIN;
1173: else if (ret == TLS_WANT_POLLOUT)
1174: pfd[POLL_STDIN].events = POLLOUT;
1175: else if (ret == 0 || ret == -1)
1.125 tedu 1176: pfd[POLL_STDIN].fd = -1;
1177: /* read something - poll net out */
1178: if (stdinbufpos > 0)
1179: pfd[POLL_NETOUT].events = POLLOUT;
1180: /* filled buffer - remove self from polling */
1181: if (stdinbufpos == BUFSIZE)
1182: pfd[POLL_STDIN].events = 0;
1183: }
1184: /* try to write to network */
1185: if (pfd[POLL_NETOUT].revents & POLLOUT && stdinbufpos > 0) {
1186: ret = drainbuf(pfd[POLL_NETOUT].fd, stdinbuf,
1.133 beck 1187: &stdinbufpos, tls_ctx);
1188: if (ret == TLS_WANT_POLLIN)
1189: pfd[POLL_NETOUT].events = POLLIN;
1190: else if (ret == TLS_WANT_POLLOUT)
1191: pfd[POLL_NETOUT].events = POLLOUT;
1192: else if (ret == -1)
1.125 tedu 1193: pfd[POLL_NETOUT].fd = -1;
1194: /* buffer empty - remove self from polling */
1195: if (stdinbufpos == 0)
1196: pfd[POLL_NETOUT].events = 0;
1197: /* buffer no longer full - poll stdin again */
1198: if (stdinbufpos < BUFSIZE)
1199: pfd[POLL_STDIN].events = POLLIN;
1200: }
1201: /* try to read from network */
1202: if (pfd[POLL_NETIN].revents & POLLIN && netinbufpos < BUFSIZE) {
1203: ret = fillbuf(pfd[POLL_NETIN].fd, netinbuf,
1.133 beck 1204: &netinbufpos, tls_ctx);
1205: if (ret == TLS_WANT_POLLIN)
1206: pfd[POLL_NETIN].events = POLLIN;
1207: else if (ret == TLS_WANT_POLLOUT)
1208: pfd[POLL_NETIN].events = POLLOUT;
1209: else if (ret == -1)
1.125 tedu 1210: pfd[POLL_NETIN].fd = -1;
1211: /* eof on net in - remove from pfd */
1212: if (ret == 0) {
1213: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1214: pfd[POLL_NETIN].fd = -1;
1.50 vincent 1215: }
1.182 bluhm 1216: if (recvlimit > 0 && ++recvcount >= recvlimit) {
1217: if (pfd[POLL_NETIN].fd != -1)
1218: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1219: pfd[POLL_NETIN].fd = -1;
1220: pfd[POLL_STDIN].fd = -1;
1221: }
1.125 tedu 1222: /* read something - poll stdout */
1223: if (netinbufpos > 0)
1224: pfd[POLL_STDOUT].events = POLLOUT;
1225: /* filled buffer - remove self from polling */
1226: if (netinbufpos == BUFSIZE)
1227: pfd[POLL_NETIN].events = 0;
1228: /* handle telnet */
1229: if (tflag)
1230: atelnet(pfd[POLL_NETIN].fd, netinbuf,
1231: netinbufpos);
1232: }
1233: /* try to write to stdout */
1234: if (pfd[POLL_STDOUT].revents & POLLOUT && netinbufpos > 0) {
1235: ret = drainbuf(pfd[POLL_STDOUT].fd, netinbuf,
1.133 beck 1236: &netinbufpos, NULL);
1237: if (ret == TLS_WANT_POLLIN)
1238: pfd[POLL_STDOUT].events = POLLIN;
1239: else if (ret == TLS_WANT_POLLOUT)
1240: pfd[POLL_STDOUT].events = POLLOUT;
1241: else if (ret == -1)
1.125 tedu 1242: pfd[POLL_STDOUT].fd = -1;
1243: /* buffer empty - remove self from polling */
1244: if (netinbufpos == 0)
1245: pfd[POLL_STDOUT].events = 0;
1246: /* buffer no longer full - poll net in again */
1247: if (netinbufpos < BUFSIZE)
1248: pfd[POLL_NETIN].events = POLLIN;
1249: }
1250:
1251: /* stdin gone and queue empty? */
1252: if (pfd[POLL_STDIN].fd == -1 && stdinbufpos == 0) {
1253: if (pfd[POLL_NETOUT].fd != -1 && Nflag)
1254: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1255: pfd[POLL_NETOUT].fd = -1;
1256: }
1257: /* net in gone and queue empty? */
1258: if (pfd[POLL_NETIN].fd == -1 && netinbufpos == 0) {
1259: pfd[POLL_STDOUT].fd = -1;
1.21 ericj 1260: }
1.11 ericj 1261: }
1.125 tedu 1262: }
1263:
1264: ssize_t
1.133 beck 1265: drainbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1266: {
1267: ssize_t n;
1268: ssize_t adjust;
1269:
1.133 beck 1270: if (tls)
1271: n = tls_write(tls, buf, *bufpos);
1272: else {
1273: n = write(fd, buf, *bufpos);
1274: /* don't treat EAGAIN, EINTR as error */
1275: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1276: n = TLS_WANT_POLLOUT;
1277: }
1.125 tedu 1278: if (n <= 0)
1279: return n;
1280: /* adjust buffer */
1281: adjust = *bufpos - n;
1282: if (adjust > 0)
1283: memmove(buf, buf + n, adjust);
1284: *bufpos -= n;
1285: return n;
1286: }
1287:
1288: ssize_t
1.133 beck 1289: fillbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1290: {
1291: size_t num = BUFSIZE - *bufpos;
1292: ssize_t n;
1293:
1.133 beck 1294: if (tls)
1295: n = tls_read(tls, buf + *bufpos, num);
1296: else {
1297: n = read(fd, buf + *bufpos, num);
1298: /* don't treat EAGAIN, EINTR as error */
1299: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1300: n = TLS_WANT_POLLIN;
1301: }
1.125 tedu 1302: if (n <= 0)
1303: return n;
1304: *bufpos += n;
1305: return n;
1.113 djm 1306: }
1307:
1308: /*
1309: * fdpass()
1310: * Pass the connected file descriptor to stdout and exit.
1311: */
1312: void
1313: fdpass(int nfd)
1314: {
1315: struct msghdr mh;
1316: union {
1317: struct cmsghdr hdr;
1318: char buf[CMSG_SPACE(sizeof(int))];
1319: } cmsgbuf;
1320: struct cmsghdr *cmsg;
1321: struct iovec iov;
1322: char c = '\0';
1323: ssize_t r;
1324: struct pollfd pfd;
1325:
1326: /* Avoid obvious stupidity */
1327: if (isatty(STDOUT_FILENO))
1328: errx(1, "Cannot pass file descriptor to tty");
1329:
1330: bzero(&mh, sizeof(mh));
1331: bzero(&cmsgbuf, sizeof(cmsgbuf));
1332: bzero(&iov, sizeof(iov));
1333:
1334: mh.msg_control = (caddr_t)&cmsgbuf.buf;
1335: mh.msg_controllen = sizeof(cmsgbuf.buf);
1336: cmsg = CMSG_FIRSTHDR(&mh);
1337: cmsg->cmsg_len = CMSG_LEN(sizeof(int));
1338: cmsg->cmsg_level = SOL_SOCKET;
1339: cmsg->cmsg_type = SCM_RIGHTS;
1340: *(int *)CMSG_DATA(cmsg) = nfd;
1341:
1342: iov.iov_base = &c;
1343: iov.iov_len = 1;
1344: mh.msg_iov = &iov;
1345: mh.msg_iovlen = 1;
1346:
1347: bzero(&pfd, sizeof(pfd));
1348: pfd.fd = STDOUT_FILENO;
1.128 tobias 1349: pfd.events = POLLOUT;
1.113 djm 1350: for (;;) {
1351: r = sendmsg(STDOUT_FILENO, &mh, 0);
1352: if (r == -1) {
1353: if (errno == EAGAIN || errno == EINTR) {
1354: if (poll(&pfd, 1, -1) == -1)
1355: err(1, "poll");
1356: continue;
1357: }
1358: err(1, "sendmsg");
1.128 tobias 1359: } else if (r != 1)
1.113 djm 1360: errx(1, "sendmsg: unexpected return value %zd", r);
1361: else
1362: break;
1363: }
1364: exit(0);
1.7 deraadt 1365: }
1.50 vincent 1366:
1.67 jmc 1367: /* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */
1.21 ericj 1368: void
1.37 jakob 1369: atelnet(int nfd, unsigned char *buf, unsigned int size)
1.6 deraadt 1370: {
1.24 ericj 1371: unsigned char *p, *end;
1372: unsigned char obuf[4];
1373:
1.95 nicm 1374: if (size < 3)
1375: return;
1376: end = buf + size - 2;
1.24 ericj 1377:
1378: for (p = buf; p < end; p++) {
1.21 ericj 1379: if (*p != IAC)
1.95 nicm 1380: continue;
1.24 ericj 1381:
1.25 ericj 1382: obuf[0] = IAC;
1.24 ericj 1383: p++;
1.50 vincent 1384: if ((*p == WILL) || (*p == WONT))
1.24 ericj 1385: obuf[1] = DONT;
1.95 nicm 1386: else if ((*p == DO) || (*p == DONT))
1.24 ericj 1387: obuf[1] = WONT;
1.95 nicm 1388: else
1389: continue;
1390:
1391: p++;
1392: obuf[2] = *p;
1393: if (atomicio(vwrite, nfd, obuf, 3) != 3)
1394: warn("Write Error!");
1.11 ericj 1395: }
1.7 deraadt 1396: }
1397:
1.153 beck 1398:
1399: int
1400: strtoport(char *portstr, int udp)
1401: {
1402: struct servent *entry;
1403: const char *errstr;
1404: char *proto;
1405: int port = -1;
1406:
1407: proto = udp ? "udp" : "tcp";
1408:
1409: port = strtonum(portstr, 1, PORT_MAX, &errstr);
1410: if (errstr == NULL)
1411: return port;
1412: if (errno != EINVAL)
1413: errx(1, "port number %s: %s", errstr, portstr);
1414: if ((entry = getservbyname(portstr, proto)) == NULL)
1415: errx(1, "service \"%s\" unknown", portstr);
1416: return ntohs(entry->s_port);
1417: }
1418:
1.11 ericj 1419: /*
1.21 ericj 1420: * build_ports()
1.105 lum 1421: * Build an array of ports in portlist[], listing each port
1.67 jmc 1422: * that we should try to connect to.
1.11 ericj 1423: */
1.21 ericj 1424: void
1.37 jakob 1425: build_ports(char *p)
1.6 deraadt 1426: {
1.88 ray 1427: char *n;
1.21 ericj 1428: int hi, lo, cp;
1429: int x = 0;
1430:
1.200 ! tedu 1431: if (isdigit((unsigned char)*p) && (n = strchr(p, '-')) != NULL) {
1.21 ericj 1432: *n = '\0';
1433: n++;
1434:
1.67 jmc 1435: /* Make sure the ports are in order: lowest->highest. */
1.153 beck 1436: hi = strtoport(n, uflag);
1437: lo = strtoport(p, uflag);
1.21 ericj 1438: if (lo > hi) {
1439: cp = hi;
1440: hi = lo;
1441: lo = cp;
1442: }
1443:
1.145 tb 1444: /*
1445: * Initialize portlist with a random permutation. Based on
1446: * Knuth, as in ip_randomid() in sys/netinet/ip_id.c.
1447: */
1.21 ericj 1448: if (rflag) {
1.145 tb 1449: for (x = 0; x <= hi - lo; x++) {
1450: cp = arc4random_uniform(x + 1);
1451: portlist[x] = portlist[cp];
1452: if (asprintf(&portlist[cp], "%d", x + lo) < 0)
1453: err(1, "asprintf");
1454: }
1455: } else { /* Load ports sequentially. */
1456: for (cp = lo; cp <= hi; cp++) {
1457: if (asprintf(&portlist[x], "%d", cp) < 0)
1458: err(1, "asprintf");
1459: x++;
1.6 deraadt 1460: }
1.11 ericj 1461: }
1.21 ericj 1462: } else {
1.153 beck 1463: char *tmp;
1464:
1465: hi = strtoport(p, uflag);
1466: if (asprintf(&tmp, "%d", hi) != -1)
1467: portlist[0] = tmp;
1468: else
1.55 fgsch 1469: err(1, NULL);
1.11 ericj 1470: }
1.13 ericj 1471: }
1472:
1473: /*
1.21 ericj 1474: * udptest()
1475: * Do a few writes to see if the UDP port is there.
1.105 lum 1476: * Fails once PF state table is full.
1.13 ericj 1477: */
1.21 ericj 1478: int
1.37 jakob 1479: udptest(int s)
1.13 ericj 1480: {
1.74 deraadt 1481: int i, ret;
1.13 ericj 1482:
1.52 vincent 1483: for (i = 0; i <= 3; i++) {
1.74 deraadt 1484: if (write(s, "X", 1) == 1)
1.21 ericj 1485: ret = 1;
1.14 ericj 1486: else
1.21 ericj 1487: ret = -1;
1.14 ericj 1488: }
1.185 tb 1489: return ret;
1.81 marius 1490: }
1491:
1.84 dtucker 1492: void
1.127 jca 1493: set_common_sockopts(int s, int af)
1.81 marius 1494: {
1495: int x = 1;
1496:
1497: if (Sflag) {
1498: if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
1499: &x, sizeof(x)) == -1)
1500: err(1, NULL);
1501: }
1502: if (Dflag) {
1503: if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
1504: &x, sizeof(x)) == -1)
1505: err(1, NULL);
1506: }
1.83 dtucker 1507: if (Tflag != -1) {
1.157 bcook 1508: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1509: IP_TOS, &Tflag, sizeof(Tflag)) == -1)
1510: err(1, "set IP ToS");
1.127 jca 1511:
1.157 bcook 1512: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1513: IPV6_TCLASS, &Tflag, sizeof(Tflag)) == -1)
1514: err(1, "set IPv6 traffic class");
1.83 dtucker 1515: }
1.90 djm 1516: if (Iflag) {
1517: if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
1518: &Iflag, sizeof(Iflag)) == -1)
1519: err(1, "set TCP receive buffer size");
1520: }
1521: if (Oflag) {
1522: if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
1523: &Oflag, sizeof(Oflag)) == -1)
1524: err(1, "set TCP send buffer size");
1525: }
1.157 bcook 1526:
1527: if (ttl != -1) {
1528: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1529: IP_TTL, &ttl, sizeof(ttl)))
1530: err(1, "set IP TTL");
1531:
1532: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1533: IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)))
1534: err(1, "set IPv6 unicast hops");
1535: }
1536:
1537: if (minttl != -1) {
1538: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1539: IP_MINTTL, &minttl, sizeof(minttl)))
1540: err(1, "set IP min TTL");
1541:
1542: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1543: IPV6_MINHOPCOUNT, &minttl, sizeof(minttl)))
1544: err(1, "set IPv6 min hop count");
1.156 jca 1545: }
1.83 dtucker 1546: }
1547:
1548: int
1.189 jsing 1549: process_tos_opt(char *s, int *val)
1.83 dtucker 1550: {
1.102 haesbaer 1551: /* DiffServ Codepoints and other TOS mappings */
1552: const struct toskeywords {
1553: const char *keyword;
1554: int val;
1555: } *t, toskeywords[] = {
1556: { "af11", IPTOS_DSCP_AF11 },
1557: { "af12", IPTOS_DSCP_AF12 },
1558: { "af13", IPTOS_DSCP_AF13 },
1559: { "af21", IPTOS_DSCP_AF21 },
1560: { "af22", IPTOS_DSCP_AF22 },
1561: { "af23", IPTOS_DSCP_AF23 },
1562: { "af31", IPTOS_DSCP_AF31 },
1563: { "af32", IPTOS_DSCP_AF32 },
1564: { "af33", IPTOS_DSCP_AF33 },
1565: { "af41", IPTOS_DSCP_AF41 },
1566: { "af42", IPTOS_DSCP_AF42 },
1567: { "af43", IPTOS_DSCP_AF43 },
1568: { "critical", IPTOS_PREC_CRITIC_ECP },
1569: { "cs0", IPTOS_DSCP_CS0 },
1570: { "cs1", IPTOS_DSCP_CS1 },
1571: { "cs2", IPTOS_DSCP_CS2 },
1572: { "cs3", IPTOS_DSCP_CS3 },
1573: { "cs4", IPTOS_DSCP_CS4 },
1574: { "cs5", IPTOS_DSCP_CS5 },
1575: { "cs6", IPTOS_DSCP_CS6 },
1576: { "cs7", IPTOS_DSCP_CS7 },
1577: { "ef", IPTOS_DSCP_EF },
1578: { "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
1579: { "lowdelay", IPTOS_LOWDELAY },
1580: { "netcontrol", IPTOS_PREC_NETCONTROL },
1581: { "reliability", IPTOS_RELIABILITY },
1582: { "throughput", IPTOS_THROUGHPUT },
1.134 deraadt 1583: { NULL, -1 },
1.102 haesbaer 1584: };
1585:
1586: for (t = toskeywords; t->keyword != NULL; t++) {
1587: if (strcmp(s, t->keyword) == 0) {
1588: *val = t->val;
1.185 tb 1589: return 1;
1.102 haesbaer 1590: }
1591: }
1.83 dtucker 1592:
1.185 tb 1593: return 0;
1.108 haesbaer 1594: }
1595:
1.133 beck 1596: int
1.189 jsing 1597: process_tls_opt(char *s, int *flags)
1.133 beck 1598: {
1.189 jsing 1599: size_t len;
1600: char *v;
1601:
1.133 beck 1602: const struct tlskeywords {
1603: const char *keyword;
1.189 jsing 1604: int flag;
1605: char **value;
1.133 beck 1606: } *t, tlskeywords[] = {
1.189 jsing 1607: { "ciphers", -1, &tls_ciphers },
1608: { "clientcert", TLS_CCERT, NULL },
1609: { "muststaple", TLS_MUSTSTAPLE, NULL },
1610: { "noverify", TLS_NOVERIFY, NULL },
1611: { "noname", TLS_NONAME, NULL },
1612: { "protocols", -1, &tls_protocols },
1613: { NULL, -1, NULL },
1.133 beck 1614: };
1615:
1.189 jsing 1616: len = strlen(s);
1617: if ((v = strchr(s, '=')) != NULL) {
1618: len = v - s;
1619: v++;
1620: }
1621:
1.133 beck 1622: for (t = tlskeywords; t->keyword != NULL; t++) {
1.189 jsing 1623: if (strlen(t->keyword) == len &&
1624: strncmp(s, t->keyword, len) == 0) {
1625: if (t->value != NULL) {
1626: if (v == NULL)
1627: errx(1, "invalid tls value `%s'", s);
1628: *t->value = v;
1629: } else {
1630: *flags |= t->flag;
1631: }
1.185 tb 1632: return 1;
1.133 beck 1633: }
1634: }
1.185 tb 1635: return 0;
1.179 beck 1636: }
1637:
1638: void
1639: save_peer_cert(struct tls *tls_ctx, FILE *fp)
1640: {
1641: const char *pem;
1642: size_t plen;
1643:
1644: if ((pem = tls_peer_cert_chain_pem(tls_ctx, &plen)) == NULL)
1645: errx(1, "Can't get peer certificate");
1.183 bluhm 1646: if (fprintf(fp, "%.*s", (int)plen, pem) < 0)
1.179 beck 1647: err(1, "unable to save peer cert");
1648: if (fflush(fp) != 0)
1649: err(1, "unable to flush peer cert");
1.133 beck 1650: }
1651:
1652: void
1.183 bluhm 1653: report_tls(struct tls * tls_ctx, char * host)
1.133 beck 1654: {
1.147 beck 1655: time_t t;
1.164 beck 1656: const char *ocsp_url;
1657:
1.138 beck 1658: fprintf(stderr, "TLS handshake negotiated %s/%s with host %s\n",
1659: tls_conn_version(tls_ctx), tls_conn_cipher(tls_ctx), host);
1.148 mmcc 1660: fprintf(stderr, "Peer name: %s\n",
1.133 beck 1661: tls_expectname ? tls_expectname : host);
1.137 beck 1662: if (tls_peer_cert_subject(tls_ctx))
1663: fprintf(stderr, "Subject: %s\n",
1664: tls_peer_cert_subject(tls_ctx));
1665: if (tls_peer_cert_issuer(tls_ctx))
1666: fprintf(stderr, "Issuer: %s\n",
1667: tls_peer_cert_issuer(tls_ctx));
1.147 beck 1668: if ((t = tls_peer_cert_notbefore(tls_ctx)) != -1)
1669: fprintf(stderr, "Valid From: %s", ctime(&t));
1670: if ((t = tls_peer_cert_notafter(tls_ctx)) != -1)
1671: fprintf(stderr, "Valid Until: %s", ctime(&t));
1.137 beck 1672: if (tls_peer_cert_hash(tls_ctx))
1673: fprintf(stderr, "Cert Hash: %s\n",
1674: tls_peer_cert_hash(tls_ctx));
1.164 beck 1675: ocsp_url = tls_peer_ocsp_url(tls_ctx);
1.166 beck 1676: if (ocsp_url != NULL)
1677: fprintf(stderr, "OCSP URL: %s\n", ocsp_url);
1.164 beck 1678: switch (tls_peer_ocsp_response_status(tls_ctx)) {
1679: case TLS_OCSP_RESPONSE_SUCCESSFUL:
1.165 beck 1680: fprintf(stderr, "OCSP Stapling: %s\n",
1.164 beck 1681: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1682: tls_peer_ocsp_result(tls_ctx));
1683: fprintf(stderr,
1684: " response_status=%d cert_status=%d crl_reason=%d\n",
1685: tls_peer_ocsp_response_status(tls_ctx),
1686: tls_peer_ocsp_cert_status(tls_ctx),
1687: tls_peer_ocsp_crl_reason(tls_ctx));
1688: t = tls_peer_ocsp_this_update(tls_ctx);
1689: fprintf(stderr, " this update: %s",
1690: t != -1 ? ctime(&t) : "\n");
1691: t = tls_peer_ocsp_next_update(tls_ctx);
1692: fprintf(stderr, " next update: %s",
1693: t != -1 ? ctime(&t) : "\n");
1694: t = tls_peer_ocsp_revocation_time(tls_ctx);
1695: fprintf(stderr, " revocation: %s",
1696: t != -1 ? ctime(&t) : "\n");
1697: break;
1698: case -1:
1699: break;
1700: default:
1.165 beck 1701: fprintf(stderr, "OCSP Stapling: failure - response_status %d (%s)\n",
1.164 beck 1702: tls_peer_ocsp_response_status(tls_ctx),
1703: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1704: tls_peer_ocsp_result(tls_ctx));
1705: break;
1706:
1707: }
1.133 beck 1708: }
1.147 beck 1709:
1.108 haesbaer 1710: void
1.198 bluhm 1711: report_sock(const char *msg, const struct sockaddr *sa, socklen_t salen,
1712: char *path)
1.108 haesbaer 1713: {
1.198 bluhm 1714: char host[NI_MAXHOST], port[NI_MAXSERV];
1.108 haesbaer 1715: int herr;
1716: int flags = NI_NUMERICSERV;
1.151 beck 1717:
1718: if (path != NULL) {
1.198 bluhm 1719: fprintf(stderr, "%s on %s\n", msg, path);
1.151 beck 1720: return;
1721: }
1.134 deraadt 1722:
1.108 haesbaer 1723: if (nflag)
1724: flags |= NI_NUMERICHOST;
1.134 deraadt 1725:
1.198 bluhm 1726: if ((herr = getnameinfo(sa, salen, host, sizeof(host),
1727: port, sizeof(port), flags)) != 0) {
1.108 haesbaer 1728: if (herr == EAI_SYSTEM)
1729: err(1, "getnameinfo");
1730: else
1731: errx(1, "getnameinfo: %s", gai_strerror(herr));
1732: }
1.134 deraadt 1733:
1.198 bluhm 1734: fprintf(stderr, "%s on %s %s\n", msg, host, port);
1.7 deraadt 1735: }
1.1 deraadt 1736:
1.11 ericj 1737: void
1.58 deraadt 1738: help(void)
1.1 deraadt 1739: {
1.21 ericj 1740: usage(0);
1741: fprintf(stderr, "\tCommand Summary:\n\
1742: \t-4 Use IPv4\n\
1743: \t-6 Use IPv6\n\
1.135 jmc 1744: \t-C certfile Public key file\n\
1745: \t-c Use TLS\n\
1.73 markus 1746: \t-D Enable the debug socket option\n\
1.69 tedu 1747: \t-d Detach from stdin\n\
1.135 jmc 1748: \t-e name\t Required name in peer certificate\n\
1.114 jmc 1749: \t-F Pass socket fd\n\
1.135 jmc 1750: \t-H hash\t Hash string of peer certificate\n\
1.21 ericj 1751: \t-h This help text\n\
1.90 djm 1752: \t-I length TCP receive buffer length\n\
1.135 jmc 1753: \t-i interval Delay interval for lines sent, ports scanned\n\
1754: \t-K keyfile Private key file\n\
1.21 ericj 1755: \t-k Keep inbound sockets open for multiple connects\n\
1756: \t-l Listen mode, for inbound connects\n\
1.156 jca 1757: \t-M ttl Outgoing TTL / Hop Limit\n\
1758: \t-m minttl Minimum incoming TTL / Hop Limit\n\
1.111 sthen 1759: \t-N Shutdown the network socket after EOF on stdin\n\
1.22 jasoni 1760: \t-n Suppress name/port resolutions\n\
1.90 djm 1761: \t-O length TCP send buffer length\n\
1.169 jmc 1762: \t-o staplefile Staple file\n\
1.86 djm 1763: \t-P proxyuser\tUsername for proxy authentication\n\
1.36 jakob 1764: \t-p port\t Specify local port for remote connects\n\
1.135 jmc 1765: \t-R CAfile CA bundle\n\
1.21 ericj 1766: \t-r Randomize remote ports\n\
1.67 jmc 1767: \t-S Enable the TCP MD5 signature option\n\
1.135 jmc 1768: \t-s source Local source address\n\
1769: \t-T keyword TOS value or TLS options\n\
1.21 ericj 1770: \t-t Answer TELNET negotiation\n\
1.67 jmc 1771: \t-U Use UNIX domain socket\n\
1.21 ericj 1772: \t-u UDP mode\n\
1.98 guenther 1773: \t-V rtable Specify alternate routing table\n\
1.21 ericj 1774: \t-v Verbose\n\
1.182 bluhm 1775: \t-W recvlimit Terminate after receiving a number of packets\n\
1.135 jmc 1776: \t-w timeout Timeout for connects and final net reads\n\
1.75 djm 1777: \t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
1778: \t-x addr[:port]\tSpecify proxy address and port\n\
1.180 jmc 1779: \t-Z Peer certificate file\n\
1.21 ericj 1780: \t-z Zero-I/O mode [used for scanning]\n\
1781: Port numbers can be individual or ranges: lo-hi [inclusive]\n");
1782: exit(1);
1.11 ericj 1783: }
1784:
1785: void
1.37 jakob 1786: usage(int ret)
1.11 ericj 1787: {
1.92 sobrado 1788: fprintf(stderr,
1.135 jmc 1789: "usage: nc [-46cDdFhklNnrStUuvz] [-C certfile] [-e name] "
1790: "[-H hash] [-I length]\n"
1.156 jca 1791: "\t [-i interval] [-K keyfile] [-M ttl] [-m minttl] [-O length]\n"
1.169 jmc 1792: "\t [-o staplefile] [-P proxy_username] [-p source_port] "
1793: "[-R CAfile]\n"
1.182 bluhm 1794: "\t [-s source] [-T keyword] [-V rtable] [-W recvlimit] "
1795: "[-w timeout]\n"
1796: "\t [-X proxy_protocol] [-x proxy_address[:port]] "
1797: "[-Z peercertfile]\n"
1798: "\t [destination] [port]\n");
1.21 ericj 1799: if (ret)
1800: exit(1);
1.7 deraadt 1801: }
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