Annotation of src/usr.bin/nc/netcat.c, Revision 1.198
1.198 ! bluhm 1: /* $OpenBSD: netcat.c,v 1.197 2018/11/06 20:39:19 jsing 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:
1.11 ericj 45: #include <err.h>
1.7 deraadt 46: #include <errno.h>
1.129 tobias 47: #include <limits.h>
1.21 ericj 48: #include <netdb.h>
49: #include <poll.h>
1.129 tobias 50: #include <signal.h>
1.13 ericj 51: #include <stdarg.h>
1.21 ericj 52: #include <stdio.h>
1.1 deraadt 53: #include <stdlib.h>
1.21 ericj 54: #include <string.h>
1.149 bcook 55: #include <time.h>
1.185 tb 56: #include <tls.h>
1.5 art 57: #include <unistd.h>
1.185 tb 58:
1.79 avsm 59: #include "atomicio.h"
1.51 vincent 60:
1.55 fgsch 61: #define PORT_MAX 65535
1.99 jeremy 62: #define UNIX_DG_TMP_SOCKET_SIZE 19
1.31 ericj 63:
1.185 tb 64: #define POLL_STDIN 0
65: #define POLL_NETOUT 1
66: #define POLL_NETIN 2
67: #define POLL_STDOUT 3
68: #define BUFSIZE 16384
1.133 beck 69:
1.189 jsing 70: #define TLS_NOVERIFY (1 << 1)
71: #define TLS_NONAME (1 << 2)
72: #define TLS_CCERT (1 << 3)
73: #define TLS_MUSTSTAPLE (1 << 4)
1.125 tedu 74:
1.21 ericj 75: /* Command Line Options */
1.68 tedu 76: int dflag; /* detached, no stdin */
1.113 djm 77: int Fflag; /* fdpass sock to stdout */
1.88 ray 78: unsigned int iflag; /* Interval Flag */
1.21 ericj 79: int kflag; /* More than one connect */
80: int lflag; /* Bind to local port */
1.111 sthen 81: int Nflag; /* shutdown() network socket */
1.67 jmc 82: int nflag; /* Don't do name look up */
1.86 djm 83: char *Pflag; /* Proxy username */
1.21 ericj 84: char *pflag; /* Localport flag */
85: int rflag; /* Random ports flag */
86: char *sflag; /* Source Address */
87: int tflag; /* Telnet Emulation */
88: int uflag; /* UDP - Default to TCP */
89: int vflag; /* Verbosity */
1.34 jakob 90: int xflag; /* Socks proxy */
1.21 ericj 91: int zflag; /* Port Scan Flag */
1.73 markus 92: int Dflag; /* sodebug */
1.90 djm 93: int Iflag; /* TCP receive buffer size */
94: int Oflag; /* TCP send buffer size */
1.65 markus 95: int Sflag; /* TCP MD5 signature option */
1.83 dtucker 96: int Tflag = -1; /* IP Type of Service */
1.117 sthen 97: int rtableid = -1;
1.21 ericj 98:
1.133 beck 99: int usetls; /* use TLS */
100: char *Cflag; /* Public cert file */
101: char *Kflag; /* Private key file */
1.168 beck 102: char *oflag; /* OCSP stapling file */
1.197 jsing 103: char *Rflag = TLS_CA_CERT_FILE; /* Root CA file */
1.133 beck 104: int tls_cachanged; /* Using non-default CA file */
105: int TLSopt; /* TLS options */
106: char *tls_expectname; /* required name in peer cert */
107: char *tls_expecthash; /* required hash of peer cert */
1.189 jsing 108: char *tls_ciphers; /* TLS ciphers */
109: char *tls_protocols; /* TLS protocols */
1.179 beck 110: FILE *Zflag; /* file to save peer cert */
1.133 beck 111:
1.182 bluhm 112: int recvcount, recvlimit;
1.49 hugh 113: int timeout = -1;
1.21 ericj 114: int family = AF_UNSPEC;
1.63 miod 115: char *portlist[PORT_MAX+1];
1.99 jeremy 116: char *unix_dg_tmp_socket;
1.156 jca 117: int ttl = -1;
118: int minttl = -1;
1.21 ericj 119:
1.40 millert 120: void atelnet(int, unsigned char *, unsigned int);
1.183 bluhm 121: int strtoport(char *portstr, int udp);
1.40 millert 122: void build_ports(char *);
1.185 tb 123: void help(void) __attribute__((noreturn));
1.194 bluhm 124: int local_listen(const char *, const char *, struct addrinfo);
1.133 beck 125: void readwrite(int, struct tls *);
1.113 djm 126: void fdpass(int nfd) __attribute__((noreturn));
1.77 otto 127: int remote_connect(const char *, const char *, struct addrinfo);
1.175 bluhm 128: int timeout_tls(int, struct tls *, int (*)(struct tls *));
1.103 fgsch 129: int timeout_connect(int, const struct sockaddr *, socklen_t);
1.86 djm 130: int socks_connect(const char *, const char *, struct addrinfo,
131: const char *, const char *, struct addrinfo, int, const char *);
1.40 millert 132: int udptest(int);
1.136 deraadt 133: int unix_bind(char *, int);
1.42 ericj 134: int unix_connect(char *);
135: int unix_listen(char *);
1.127 jca 136: void set_common_sockopts(int, int);
1.189 jsing 137: int process_tos_opt(char *, int *);
138: int process_tls_opt(char *, int *);
1.183 bluhm 139: void save_peer_cert(struct tls *_tls_ctx, FILE *_fp);
1.198 ! bluhm 140: void report_sock(const char *, const struct sockaddr *, socklen_t, char *);
1.183 bluhm 141: void report_tls(struct tls *tls_ctx, char * host);
1.40 millert 142: void usage(int);
1.133 beck 143: ssize_t drainbuf(int, unsigned char *, size_t *, struct tls *);
144: ssize_t fillbuf(int, unsigned char *, size_t *, struct tls *);
145: void tls_setup_client(struct tls *, int, char *);
1.134 deraadt 146: struct tls *tls_setup_server(struct tls *, int, char *);
1.1 deraadt 147:
1.21 ericj 148: int
1.37 jakob 149: main(int argc, char *argv[])
1.21 ericj 150: {
1.154 deraadt 151: int ch, s = -1, ret, socksv;
1.88 ray 152: char *host, *uport;
1.21 ericj 153: struct addrinfo hints;
1.29 smart 154: struct servent *sv;
1.21 ericj 155: socklen_t len;
1.76 hshoexer 156: struct sockaddr_storage cliaddr;
1.183 bluhm 157: char *proxy = NULL, *proxyport = NULL;
1.172 jca 158: const char *errstr;
1.34 jakob 159: struct addrinfo proxyhints;
1.99 jeremy 160: char unix_dg_tmp_socket_buf[UNIX_DG_TMP_SOCKET_SIZE];
1.133 beck 161: struct tls_config *tls_cfg = NULL;
162: struct tls *tls_ctx = NULL;
1.189 jsing 163: uint32_t protocols;
1.11 ericj 164:
1.29 smart 165: ret = 1;
1.46 markus 166: socksv = 5;
1.29 smart 167: host = NULL;
168: uport = NULL;
169: sv = NULL;
1.129 tobias 170:
171: signal(SIGPIPE, SIG_IGN);
1.29 smart 172:
1.80 mcbride 173: while ((ch = getopt(argc, argv,
1.182 bluhm 174: "46C:cDde:FH:hI:i:K:klM:m:NnO:o:P:p:R:rSs:T:tUuV:vW:w:X:x:Z:z"))
175: != -1) {
1.21 ericj 176: switch (ch) {
177: case '4':
178: family = AF_INET;
179: break;
180: case '6':
181: family = AF_INET6;
182: break;
1.42 ericj 183: case 'U':
184: family = AF_UNIX;
185: break;
1.46 markus 186: case 'X':
1.75 djm 187: if (strcasecmp(optarg, "connect") == 0)
188: socksv = -1; /* HTTP proxy CONNECT */
189: else if (strcmp(optarg, "4") == 0)
190: socksv = 4; /* SOCKS v.4 */
191: else if (strcmp(optarg, "5") == 0)
192: socksv = 5; /* SOCKS v.5 */
193: else
194: errx(1, "unsupported proxy protocol");
1.46 markus 195: break;
1.133 beck 196: case 'C':
197: Cflag = optarg;
198: break;
199: case 'c':
200: usetls = 1;
201: break;
1.68 tedu 202: case 'd':
203: dflag = 1;
204: break;
1.133 beck 205: case 'e':
206: tls_expectname = optarg;
207: break;
1.113 djm 208: case 'F':
209: Fflag = 1;
210: break;
1.133 beck 211: case 'H':
212: tls_expecthash = optarg;
213: break;
1.21 ericj 214: case 'h':
215: help();
216: break;
217: case 'i':
1.88 ray 218: iflag = strtonum(optarg, 0, UINT_MAX, &errstr);
219: if (errstr)
220: errx(1, "interval %s: %s", errstr, optarg);
1.21 ericj 221: break;
1.133 beck 222: case 'K':
223: Kflag = optarg;
224: break;
1.21 ericj 225: case 'k':
226: kflag = 1;
227: break;
228: case 'l':
229: lflag = 1;
230: break;
1.156 jca 231: case 'M':
232: ttl = strtonum(optarg, 0, 255, &errstr);
233: if (errstr)
234: errx(1, "ttl is %s", errstr);
235: break;
236: case 'm':
237: minttl = strtonum(optarg, 0, 255, &errstr);
238: if (errstr)
239: errx(1, "minttl is %s", errstr);
240: break;
1.111 sthen 241: case 'N':
242: Nflag = 1;
243: break;
1.21 ericj 244: case 'n':
245: nflag = 1;
246: break;
1.86 djm 247: case 'P':
248: Pflag = optarg;
249: break;
1.21 ericj 250: case 'p':
251: pflag = optarg;
252: break;
1.133 beck 253: case 'R':
254: tls_cachanged = 1;
255: Rflag = optarg;
256: break;
1.21 ericj 257: case 'r':
258: rflag = 1;
259: break;
260: case 's':
261: sflag = optarg;
262: break;
263: case 't':
264: tflag = 1;
265: break;
266: case 'u':
267: uflag = 1;
268: break;
1.93 claudio 269: case 'V':
1.117 sthen 270: rtableid = (int)strtonum(optarg, 0,
1.93 claudio 271: RT_TABLEID_MAX, &errstr);
272: if (errstr)
1.98 guenther 273: errx(1, "rtable %s: %s", errstr, optarg);
1.93 claudio 274: break;
1.21 ericj 275: case 'v':
276: vflag = 1;
277: break;
1.182 bluhm 278: case 'W':
279: recvlimit = strtonum(optarg, 1, INT_MAX, &errstr);
280: if (errstr)
281: errx(1, "receive limit %s: %s", errstr, optarg);
282: break;
1.70 deraadt 283: case 'w':
1.88 ray 284: timeout = strtonum(optarg, 0, INT_MAX / 1000, &errstr);
285: if (errstr)
286: errx(1, "timeout %s: %s", errstr, optarg);
1.49 hugh 287: timeout *= 1000;
1.21 ericj 288: break;
1.34 jakob 289: case 'x':
290: xflag = 1;
1.64 deraadt 291: if ((proxy = strdup(optarg)) == NULL)
292: err(1, NULL);
1.34 jakob 293: break;
1.179 beck 294: case 'Z':
295: if (strcmp(optarg, "-") == 0)
296: Zflag = stderr;
297: else if ((Zflag = fopen(optarg, "w")) == NULL)
298: err(1, "can't open %s", optarg);
299: break;
1.21 ericj 300: case 'z':
301: zflag = 1;
302: break;
1.73 markus 303: case 'D':
304: Dflag = 1;
305: break;
1.90 djm 306: case 'I':
307: Iflag = strtonum(optarg, 1, 65536 << 14, &errstr);
308: if (errstr != NULL)
309: errx(1, "TCP receive window %s: %s",
310: errstr, optarg);
311: break;
312: case 'O':
313: Oflag = strtonum(optarg, 1, 65536 << 14, &errstr);
314: if (errstr != NULL)
315: errx(1, "TCP send window %s: %s",
316: errstr, optarg);
317: break;
1.168 beck 318: case 'o':
319: oflag = optarg;
320: break;
1.65 markus 321: case 'S':
322: Sflag = 1;
323: break;
1.83 dtucker 324: case 'T':
1.102 haesbaer 325: errstr = NULL;
326: errno = 0;
1.189 jsing 327: if (process_tls_opt(optarg, &TLSopt))
1.102 haesbaer 328: break;
1.189 jsing 329: if (process_tos_opt(optarg, &Tflag))
1.133 beck 330: break;
1.102 haesbaer 331: if (strlen(optarg) > 1 && optarg[0] == '0' &&
332: optarg[1] == 'x')
333: Tflag = (int)strtol(optarg, NULL, 16);
334: else
335: Tflag = (int)strtonum(optarg, 0, 255,
336: &errstr);
337: if (Tflag < 0 || Tflag > 255 || errstr || errno)
1.133 beck 338: errx(1, "illegal tos/tls value %s", optarg);
1.83 dtucker 339: break;
1.21 ericj 340: default:
341: usage(1);
342: }
343: }
344: argc -= optind;
345: argv += optind;
1.11 ericj 346:
1.143 deraadt 347: if (rtableid >= 0)
1.142 benno 348: if (setrtable(rtableid) == -1)
349: err(1, "setrtable");
1.143 deraadt 350:
1.191 beck 351: /* Cruft to make sure options are clean, and used properly. */
352: if (argv[0] && !argv[1] && family == AF_UNIX) {
353: host = argv[0];
354: uport = NULL;
355: } else if (argv[0] && !argv[1]) {
356: if (!lflag)
357: usage(1);
358: uport = argv[0];
359: host = NULL;
360: } else if (argv[0] && argv[1]) {
361: host = argv[0];
362: uport = argv[1];
363: } else
364: usage(1);
1.192 deraadt 365:
366: if (usetls) {
367: if (Cflag && unveil(Cflag, "r") == -1)
368: err(1, "unveil");
369: if (unveil(Rflag, "r") == -1)
370: err(1, "unveil");
371: if (Kflag && unveil(Kflag, "r") == -1)
372: err(1, "unveil");
373: if (oflag && unveil(oflag, "r") == -1)
374: err(1, "unveil");
375: } else {
376: if (family == AF_UNIX) {
377: if (unveil(host, "rwc") == -1)
378: err(1, "unveil");
379: if (uflag && !lflag) {
380: if (unveil(sflag ? sflag : "/tmp", "rwc") == -1)
381: err(1, "unveil");
382: }
383: } else {
384: if (unveil("/", "") == -1)
385: err(1, "unveil");
386: }
387: }
1.191 beck 388:
1.142 benno 389: if (family == AF_UNIX) {
1.140 beck 390: if (pledge("stdio rpath wpath cpath tmppath unix", NULL) == -1)
391: err(1, "pledge");
1.186 tb 392: } else if (Fflag && Pflag) {
393: if (pledge("stdio inet dns sendfd tty", NULL) == -1)
394: err(1, "pledge");
1.191 beck 395: } else if (Fflag) {
1.186 tb 396: if (pledge("stdio inet dns sendfd", NULL) == -1)
1.152 beck 397: err(1, "pledge");
1.184 tb 398: } else if (Pflag && usetls) {
399: if (pledge("stdio rpath inet dns tty", NULL) == -1)
400: err(1, "pledge");
1.152 beck 401: } else if (Pflag) {
402: if (pledge("stdio inet dns tty", NULL) == -1)
1.140 beck 403: err(1, "pledge");
1.143 deraadt 404: } else if (usetls) {
1.140 beck 405: if (pledge("stdio rpath inet dns", NULL) == -1)
406: err(1, "pledge");
1.143 deraadt 407: } else if (pledge("stdio inet dns", NULL) == -1)
1.140 beck 408: err(1, "pledge");
1.1 deraadt 409:
1.21 ericj 410: if (lflag && sflag)
411: errx(1, "cannot use -s and -l");
412: if (lflag && pflag)
413: errx(1, "cannot use -p and -l");
414: if (lflag && zflag)
1.32 ericj 415: errx(1, "cannot use -z and -l");
1.21 ericj 416: if (!lflag && kflag)
1.32 ericj 417: errx(1, "must use -l with -k");
1.133 beck 418: if (uflag && usetls)
419: errx(1, "cannot use -c and -u");
420: if ((family == AF_UNIX) && usetls)
421: errx(1, "cannot use -c and -U");
1.140 beck 422: if ((family == AF_UNIX) && Fflag)
423: errx(1, "cannot use -F and -U");
424: if (Fflag && usetls)
425: errx(1, "cannot use -c and -F");
1.133 beck 426: if (TLSopt && !usetls)
427: errx(1, "you must specify -c to use TLS options");
428: if (Cflag && !usetls)
429: errx(1, "you must specify -c to use -C");
430: if (Kflag && !usetls)
431: errx(1, "you must specify -c to use -K");
1.179 beck 432: if (Zflag && !usetls)
433: errx(1, "you must specify -c to use -Z");
1.168 beck 434: if (oflag && !Cflag)
435: errx(1, "you must specify -C to use -o");
1.133 beck 436: if (tls_cachanged && !usetls)
437: errx(1, "you must specify -c to use -R");
438: if (tls_expecthash && !usetls)
439: errx(1, "you must specify -c to use -H");
440: if (tls_expectname && !usetls)
441: errx(1, "you must specify -c to use -e");
1.21 ericj 442:
1.99 jeremy 443: /* Get name of temporary socket for unix datagram client */
444: if ((family == AF_UNIX) && uflag && !lflag) {
445: if (sflag) {
446: unix_dg_tmp_socket = sflag;
447: } else {
448: strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",
1.136 deraadt 449: UNIX_DG_TMP_SOCKET_SIZE);
1.99 jeremy 450: if (mktemp(unix_dg_tmp_socket_buf) == NULL)
451: err(1, "mktemp");
452: unix_dg_tmp_socket = unix_dg_tmp_socket_buf;
453: }
454: }
455:
1.67 jmc 456: /* Initialize addrinfo structure. */
1.42 ericj 457: if (family != AF_UNIX) {
458: memset(&hints, 0, sizeof(struct addrinfo));
459: hints.ai_family = family;
460: hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
461: hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
462: if (nflag)
463: hints.ai_flags |= AI_NUMERICHOST;
464: }
1.1 deraadt 465:
1.34 jakob 466: if (xflag) {
467: if (uflag)
468: errx(1, "no proxy support for UDP mode");
469:
470: if (lflag)
471: errx(1, "no proxy support for listen");
472:
1.42 ericj 473: if (family == AF_UNIX)
474: errx(1, "no proxy support for unix sockets");
475:
1.34 jakob 476: if (sflag)
477: errx(1, "no proxy support for local source address");
478:
1.172 jca 479: if (*proxy == '[') {
480: ++proxy;
481: proxyport = strchr(proxy, ']');
482: if (proxyport == NULL)
483: errx(1, "missing closing bracket in proxy");
484: *proxyport++ = '\0';
485: if (*proxyport == '\0')
486: /* Use default proxy port. */
487: proxyport = NULL;
488: else {
489: if (*proxyport == ':')
490: ++proxyport;
491: else
492: errx(1, "garbage proxy port delimiter");
493: }
494: } else {
495: proxyport = strrchr(proxy, ':');
496: if (proxyport != NULL)
497: *proxyport++ = '\0';
498: }
1.34 jakob 499:
500: memset(&proxyhints, 0, sizeof(struct addrinfo));
501: proxyhints.ai_family = family;
502: proxyhints.ai_socktype = SOCK_STREAM;
503: proxyhints.ai_protocol = IPPROTO_TCP;
504: if (nflag)
505: proxyhints.ai_flags |= AI_NUMERICHOST;
506: }
507:
1.133 beck 508: if (usetls) {
509: if ((tls_cfg = tls_config_new()) == NULL)
510: errx(1, "unable to allocate TLS config");
1.162 jsing 511: if (Rflag && tls_config_set_ca_file(tls_cfg, Rflag) == -1)
512: errx(1, "%s", tls_config_error(tls_cfg));
513: if (Cflag && tls_config_set_cert_file(tls_cfg, Cflag) == -1)
514: errx(1, "%s", tls_config_error(tls_cfg));
515: if (Kflag && tls_config_set_key_file(tls_cfg, Kflag) == -1)
1.168 beck 516: errx(1, "%s", tls_config_error(tls_cfg));
517: if (oflag && tls_config_set_ocsp_staple_file(tls_cfg, oflag) == -1)
1.162 jsing 518: errx(1, "%s", tls_config_error(tls_cfg));
1.189 jsing 519: if (tls_config_parse_protocols(&protocols, tls_protocols) == -1)
520: errx(1, "invalid TLS protocols `%s'", tls_protocols);
521: if (tls_config_set_protocols(tls_cfg, protocols) == -1)
522: errx(1, "%s", tls_config_error(tls_cfg));
523: if (tls_config_set_ciphers(tls_cfg, tls_ciphers) == -1)
524: errx(1, "%s", tls_config_error(tls_cfg));
1.133 beck 525: if (!lflag && (TLSopt & TLS_CCERT))
526: errx(1, "clientcert is only valid with -l");
527: if (TLSopt & TLS_NONAME)
528: tls_config_insecure_noverifyname(tls_cfg);
529: if (TLSopt & TLS_NOVERIFY) {
530: if (tls_expecthash != NULL)
1.186 tb 531: errx(1, "-H and -T noverify may not be used "
532: "together");
1.133 beck 533: tls_config_insecure_noverifycert(tls_cfg);
534: }
1.167 beck 535: if (TLSopt & TLS_MUSTSTAPLE)
536: tls_config_ocsp_require_stapling(tls_cfg);
1.162 jsing 537:
538: if (Pflag) {
539: if (pledge("stdio inet dns tty", NULL) == -1)
540: err(1, "pledge");
541: } else if (pledge("stdio inet dns", NULL) == -1)
542: err(1, "pledge");
1.133 beck 543: }
1.21 ericj 544: if (lflag) {
1.27 ericj 545: ret = 0;
1.1 deraadt 546:
1.99 jeremy 547: if (family == AF_UNIX) {
548: if (uflag)
1.136 deraadt 549: s = unix_bind(host, 0);
1.99 jeremy 550: else
551: s = unix_listen(host);
552: }
1.42 ericj 553:
1.133 beck 554: if (usetls) {
555: tls_config_verify_client_optional(tls_cfg);
556: if ((tls_ctx = tls_server()) == NULL)
557: errx(1, "tls server creation failed");
558: if (tls_configure(tls_ctx, tls_cfg) == -1)
559: errx(1, "tls configuration failed (%s)",
560: tls_error(tls_ctx));
561: }
1.67 jmc 562: /* Allow only one connection at a time, but stay alive. */
1.21 ericj 563: for (;;) {
1.193 bluhm 564: if (family != AF_UNIX) {
565: if (s != -1)
566: close(s);
1.42 ericj 567: s = local_listen(host, uport, hints);
1.193 bluhm 568: }
1.42 ericj 569: if (s < 0)
1.30 smart 570: err(1, NULL);
1.181 deraadt 571: if (uflag && kflag) {
572: /*
573: * For UDP and -k, don't connect the socket,
574: * let it receive datagrams from multiple
575: * socket pairs.
576: */
1.133 beck 577: readwrite(s, NULL);
1.181 deraadt 578: } else if (uflag && !kflag) {
579: /*
580: * For UDP and not -k, we will use recvfrom()
581: * initially to wait for a caller, then use
582: * the regular functions to talk to the caller.
583: */
1.188 bluhm 584: int rv;
585: char buf[2048];
1.21 ericj 586: struct sockaddr_storage z;
587:
588: len = sizeof(z);
1.188 bluhm 589: rv = recvfrom(s, buf, sizeof(buf), MSG_PEEK,
1.37 jakob 590: (struct sockaddr *)&z, &len);
1.23 ericj 591: if (rv < 0)
1.57 stevesk 592: err(1, "recvfrom");
1.21 ericj 593:
1.37 jakob 594: rv = connect(s, (struct sockaddr *)&z, len);
1.23 ericj 595: if (rv < 0)
1.57 stevesk 596: err(1, "connect");
1.1 deraadt 597:
1.108 haesbaer 598: if (vflag)
1.198 ! bluhm 599: report_sock("Connection received",
! 600: (struct sockaddr *)&z, len, NULL);
1.108 haesbaer 601:
1.133 beck 602: readwrite(s, NULL);
1.21 ericj 603: } else {
1.195 bluhm 604: struct tls *tls_cctx = NULL;
605: int connfd;
606:
1.78 otto 607: len = sizeof(cliaddr);
1.132 bluhm 608: connfd = accept4(s, (struct sockaddr *)&cliaddr,
609: &len, SOCK_NONBLOCK);
1.110 deraadt 610: if (connfd == -1) {
611: /* For now, all errnos are fatal */
1.125 tedu 612: err(1, "accept");
1.110 deraadt 613: }
1.108 haesbaer 614: if (vflag)
1.198 ! bluhm 615: report_sock("Connection received",
! 616: (struct sockaddr *)&cliaddr, len,
1.151 beck 617: family == AF_UNIX ? host : NULL);
1.133 beck 618: if ((usetls) &&
1.134 deraadt 619: (tls_cctx = tls_setup_server(tls_ctx, connfd, host)))
1.133 beck 620: readwrite(connfd, tls_cctx);
621: if (!usetls)
622: readwrite(connfd, NULL);
1.195 bluhm 623: if (tls_cctx)
1.175 bluhm 624: timeout_tls(s, tls_cctx, tls_close);
1.99 jeremy 625: close(connfd);
1.195 bluhm 626: tls_free(tls_cctx);
1.21 ericj 627: }
1.193 bluhm 628: if (family == AF_UNIX && uflag) {
1.99 jeremy 629: if (connect(s, NULL, 0) < 0)
630: err(1, "connect");
631: }
1.27 ericj 632:
1.21 ericj 633: if (!kflag)
634: break;
1.11 ericj 635: }
1.42 ericj 636: } else if (family == AF_UNIX) {
637: ret = 0;
638:
1.177 bluhm 639: if ((s = unix_connect(host)) > 0) {
640: if (!zflag)
641: readwrite(s, NULL);
1.42 ericj 642: close(s);
1.196 dlg 643: } else {
644: warn("%s", host);
1.42 ericj 645: ret = 1;
1.196 dlg 646: }
1.42 ericj 647:
1.99 jeremy 648: if (uflag)
649: unlink(unix_dg_tmp_socket);
1.185 tb 650: return ret;
1.42 ericj 651:
1.21 ericj 652: } else {
653: int i = 0;
1.6 deraadt 654:
1.67 jmc 655: /* Construct the portlist[] array. */
1.21 ericj 656: build_ports(uport);
1.1 deraadt 657:
1.67 jmc 658: /* Cycle through portlist, connecting to each port. */
1.154 deraadt 659: for (s = -1, i = 0; portlist[i] != NULL; i++) {
660: if (s != -1)
1.21 ericj 661: close(s);
1.195 bluhm 662: tls_free(tls_ctx);
663: tls_ctx = NULL;
1.34 jakob 664:
1.133 beck 665: if (usetls) {
666: if ((tls_ctx = tls_client()) == NULL)
667: errx(1, "tls client creation failed");
668: if (tls_configure(tls_ctx, tls_cfg) == -1)
669: errx(1, "tls configuration failed (%s)",
670: tls_error(tls_ctx));
671: }
1.34 jakob 672: if (xflag)
673: s = socks_connect(host, portlist[i], hints,
1.172 jca 674: proxy, proxyport, proxyhints, socksv,
1.86 djm 675: Pflag);
1.34 jakob 676: else
677: s = remote_connect(host, portlist[i], hints);
678:
1.154 deraadt 679: if (s == -1)
1.21 ericj 680: continue;
1.1 deraadt 681:
1.21 ericj 682: ret = 0;
683: if (vflag || zflag) {
1.67 jmc 684: /* For UDP, make sure we are connected. */
1.21 ericj 685: if (uflag) {
1.50 vincent 686: if (udptest(s) == -1) {
1.21 ericj 687: ret = 1;
688: continue;
689: }
690: }
1.1 deraadt 691:
1.67 jmc 692: /* Don't look up port if -n. */
1.21 ericj 693: if (nflag)
694: sv = NULL;
695: else {
696: sv = getservbyport(
1.37 jakob 697: ntohs(atoi(portlist[i])),
698: uflag ? "udp" : "tcp");
1.21 ericj 699: }
1.50 vincent 700:
1.94 mpf 701: fprintf(stderr,
702: "Connection to %s %s port [%s/%s] "
703: "succeeded!\n", host, portlist[i],
704: uflag ? "udp" : "tcp",
1.37 jakob 705: sv ? sv->s_name : "*");
1.21 ericj 706: }
1.113 djm 707: if (Fflag)
708: fdpass(s);
1.133 beck 709: else {
710: if (usetls)
711: tls_setup_client(tls_ctx, s, host);
712: if (!zflag)
713: readwrite(s, tls_ctx);
1.195 bluhm 714: if (tls_ctx)
1.175 bluhm 715: timeout_tls(s, tls_ctx, tls_close);
1.133 beck 716: }
1.7 deraadt 717: }
1.11 ericj 718: }
1.1 deraadt 719:
1.154 deraadt 720: if (s != -1)
1.21 ericj 721: close(s);
1.195 bluhm 722: tls_free(tls_ctx);
1.133 beck 723: tls_config_free(tls_cfg);
724:
1.185 tb 725: return ret;
1.7 deraadt 726: }
1.1 deraadt 727:
1.11 ericj 728: /*
1.99 jeremy 729: * unix_bind()
730: * Returns a unix socket bound to the given path
1.42 ericj 731: */
732: int
1.136 deraadt 733: unix_bind(char *path, int flags)
1.42 ericj 734: {
1.144 bcook 735: struct sockaddr_un s_un;
1.155 deraadt 736: int s, save_errno;
1.42 ericj 737:
1.99 jeremy 738: /* Create unix domain socket. */
1.136 deraadt 739: if ((s = socket(AF_UNIX, flags | (uflag ? SOCK_DGRAM : SOCK_STREAM),
740: 0)) < 0)
1.185 tb 741: return -1;
1.42 ericj 742:
1.144 bcook 743: memset(&s_un, 0, sizeof(struct sockaddr_un));
744: s_un.sun_family = AF_UNIX;
1.60 avsm 745:
1.144 bcook 746: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
747: sizeof(s_un.sun_path)) {
1.60 avsm 748: close(s);
749: errno = ENAMETOOLONG;
1.185 tb 750: return -1;
1.60 avsm 751: }
1.99 jeremy 752:
1.144 bcook 753: if (bind(s, (struct sockaddr *)&s_un, sizeof(s_un)) < 0) {
1.155 deraadt 754: save_errno = errno;
1.50 vincent 755: close(s);
1.155 deraadt 756: errno = save_errno;
1.185 tb 757: return -1;
1.42 ericj 758: }
1.198 ! bluhm 759: if (vflag)
! 760: report_sock("Bound", NULL, 0, path);
1.185 tb 761:
762: return s;
1.42 ericj 763: }
764:
1.173 bluhm 765: int
1.175 bluhm 766: timeout_tls(int s, struct tls *tls_ctx, int (*func)(struct tls *))
1.173 bluhm 767: {
768: struct pollfd pfd;
769: int ret;
770:
1.175 bluhm 771: while ((ret = (*func)(tls_ctx)) != 0) {
1.173 bluhm 772: if (ret == TLS_WANT_POLLIN)
773: pfd.events = POLLIN;
774: else if (ret == TLS_WANT_POLLOUT)
775: pfd.events = POLLOUT;
776: else
777: break;
778: pfd.fd = s;
779: if ((ret = poll(&pfd, 1, timeout)) == 1)
780: continue;
781: else if (ret == 0) {
782: errno = ETIMEDOUT;
783: ret = -1;
784: break;
785: } else
786: err(1, "poll failed");
787: }
788:
1.185 tb 789: return ret;
1.173 bluhm 790: }
791:
1.133 beck 792: void
793: tls_setup_client(struct tls *tls_ctx, int s, char *host)
794: {
1.173 bluhm 795: const char *errstr;
1.136 deraadt 796:
1.133 beck 797: if (tls_connect_socket(tls_ctx, s,
798: tls_expectname ? tls_expectname : host) == -1) {
799: errx(1, "tls connection failed (%s)",
800: tls_error(tls_ctx));
801: }
1.175 bluhm 802: if (timeout_tls(s, tls_ctx, tls_handshake) == -1) {
1.173 bluhm 803: if ((errstr = tls_error(tls_ctx)) == NULL)
804: errstr = strerror(errno);
805: errx(1, "tls handshake failed (%s)", errstr);
806: }
1.133 beck 807: if (vflag)
1.183 bluhm 808: report_tls(tls_ctx, host);
1.137 beck 809: if (tls_expecthash && tls_peer_cert_hash(tls_ctx) &&
810: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 811: errx(1, "peer certificate is not %s", tls_expecthash);
1.179 beck 812: if (Zflag) {
813: save_peer_cert(tls_ctx, Zflag);
814: if (Zflag != stderr && (fclose(Zflag) != 0))
815: err(1, "fclose failed saving peer cert");
816: }
1.133 beck 817: }
1.141 deraadt 818:
1.133 beck 819: struct tls *
820: tls_setup_server(struct tls *tls_ctx, int connfd, char *host)
821: {
822: struct tls *tls_cctx;
1.173 bluhm 823: const char *errstr;
1.136 deraadt 824:
1.173 bluhm 825: if (tls_accept_socket(tls_ctx, &tls_cctx, connfd) == -1) {
826: warnx("tls accept failed (%s)", tls_error(tls_ctx));
1.175 bluhm 827: } else if (timeout_tls(connfd, tls_cctx, tls_handshake) == -1) {
1.178 bluhm 828: if ((errstr = tls_error(tls_cctx)) == NULL)
1.173 bluhm 829: errstr = strerror(errno);
830: warnx("tls handshake failed (%s)", errstr);
1.133 beck 831: } else {
832: int gotcert = tls_peer_cert_provided(tls_cctx);
1.136 deraadt 833:
1.133 beck 834: if (vflag && gotcert)
1.183 bluhm 835: report_tls(tls_cctx, host);
1.133 beck 836: if ((TLSopt & TLS_CCERT) && !gotcert)
837: warnx("No client certificate provided");
1.137 beck 838: else if (gotcert && tls_peer_cert_hash(tls_ctx) && tls_expecthash &&
839: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 840: warnx("peer certificate is not %s", tls_expecthash);
841: else if (gotcert && tls_expectname &&
1.134 deraadt 842: (!tls_peer_cert_contains_name(tls_cctx, tls_expectname)))
1.133 beck 843: warnx("name (%s) not found in client cert",
844: tls_expectname);
845: else {
846: return tls_cctx;
847: }
848: }
849: return NULL;
850: }
1.141 deraadt 851:
1.42 ericj 852: /*
1.99 jeremy 853: * unix_connect()
854: * Returns a socket connected to a local unix socket. Returns -1 on failure.
1.42 ericj 855: */
856: int
1.99 jeremy 857: unix_connect(char *path)
1.42 ericj 858: {
1.144 bcook 859: struct sockaddr_un s_un;
1.155 deraadt 860: int s, save_errno;
1.42 ericj 861:
1.99 jeremy 862: if (uflag) {
1.136 deraadt 863: if ((s = unix_bind(unix_dg_tmp_socket, SOCK_CLOEXEC)) < 0)
1.185 tb 864: return -1;
1.99 jeremy 865: } else {
1.136 deraadt 866: if ((s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0)) < 0)
1.185 tb 867: return -1;
1.99 jeremy 868: }
1.42 ericj 869:
1.144 bcook 870: memset(&s_un, 0, sizeof(struct sockaddr_un));
871: s_un.sun_family = AF_UNIX;
1.60 avsm 872:
1.144 bcook 873: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
874: sizeof(s_un.sun_path)) {
1.60 avsm 875: close(s);
876: errno = ENAMETOOLONG;
1.185 tb 877: return -1;
1.60 avsm 878: }
1.144 bcook 879: if (connect(s, (struct sockaddr *)&s_un, sizeof(s_un)) < 0) {
1.155 deraadt 880: save_errno = errno;
1.42 ericj 881: close(s);
1.155 deraadt 882: errno = save_errno;
1.185 tb 883: return -1;
1.42 ericj 884: }
1.185 tb 885: return s;
1.99 jeremy 886:
887: }
888:
889: /*
890: * unix_listen()
891: * Create a unix domain socket, and listen on it.
892: */
893: int
894: unix_listen(char *path)
895: {
896: int s;
1.198 ! bluhm 897:
1.136 deraadt 898: if ((s = unix_bind(path, 0)) < 0)
1.185 tb 899: return -1;
1.42 ericj 900: if (listen(s, 5) < 0) {
901: close(s);
1.185 tb 902: return -1;
1.42 ericj 903: }
1.198 ! bluhm 904: if (vflag)
! 905: report_sock("Listening", NULL, 0, path);
! 906:
1.185 tb 907: return s;
1.42 ericj 908: }
909:
910: /*
1.21 ericj 911: * remote_connect()
1.67 jmc 912: * Returns a socket connected to a remote host. Properly binds to a local
913: * port or source address if needed. Returns -1 on failure.
1.11 ericj 914: */
1.21 ericj 915: int
1.77 otto 916: remote_connect(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 917: {
918: struct addrinfo *res, *res0;
1.163 bcook 919: int s = -1, error, on = 1, save_errno;
1.21 ericj 920:
1.161 halex 921: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.176 jca 922: errx(1, "getaddrinfo for host \"%s\" port %s: %s", host,
923: port, gai_strerror(error));
1.21 ericj 924:
1.161 halex 925: for (res = res0; res; res = res->ai_next) {
926: if ((s = socket(res->ai_family, res->ai_socktype |
927: SOCK_NONBLOCK, res->ai_protocol)) < 0)
1.21 ericj 928: continue;
929:
1.67 jmc 930: /* Bind to a local port or source address if specified. */
1.21 ericj 931: if (sflag || pflag) {
932: struct addrinfo ahints, *ares;
1.6 deraadt 933:
1.91 markus 934: /* try SO_BINDANY, but don't insist */
935: setsockopt(s, SOL_SOCKET, SO_BINDANY, &on, sizeof(on));
1.21 ericj 936: memset(&ahints, 0, sizeof(struct addrinfo));
1.161 halex 937: ahints.ai_family = res->ai_family;
1.21 ericj 938: ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
939: ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
1.25 ericj 940: ahints.ai_flags = AI_PASSIVE;
1.38 jakob 941: if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
1.56 stevesk 942: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.21 ericj 943:
944: if (bind(s, (struct sockaddr *)ares->ai_addr,
1.62 millert 945: ares->ai_addrlen) < 0)
1.119 guenther 946: err(1, "bind failed");
1.21 ericj 947: freeaddrinfo(ares);
1.6 deraadt 948: }
1.81 marius 949:
1.161 halex 950: set_common_sockopts(s, res->ai_family);
1.6 deraadt 951:
1.161 halex 952: if (timeout_connect(s, res->ai_addr, res->ai_addrlen) == 0)
1.6 deraadt 953: break;
1.143 deraadt 954: if (vflag)
1.71 mcbride 955: warn("connect to %s port %s (%s) failed", host, port,
956: uflag ? "udp" : "tcp");
1.34 jakob 957:
1.155 deraadt 958: save_errno = errno;
1.21 ericj 959: close(s);
1.155 deraadt 960: errno = save_errno;
1.21 ericj 961: s = -1;
1.161 halex 962: }
1.21 ericj 963:
1.161 halex 964: freeaddrinfo(res0);
1.1 deraadt 965:
1.185 tb 966: return s;
1.103 fgsch 967: }
968:
969: int
970: timeout_connect(int s, const struct sockaddr *name, socklen_t namelen)
971: {
972: struct pollfd pfd;
973: socklen_t optlen;
1.132 bluhm 974: int optval;
1.103 fgsch 975: int ret;
976:
977: if ((ret = connect(s, name, namelen)) != 0 && errno == EINPROGRESS) {
978: pfd.fd = s;
979: pfd.events = POLLOUT;
980: if ((ret = poll(&pfd, 1, timeout)) == 1) {
981: optlen = sizeof(optval);
982: if ((ret = getsockopt(s, SOL_SOCKET, SO_ERROR,
983: &optval, &optlen)) == 0) {
984: errno = optval;
985: ret = optval == 0 ? 0 : -1;
986: }
987: } else if (ret == 0) {
988: errno = ETIMEDOUT;
989: ret = -1;
990: } else
991: err(1, "poll failed");
992: }
993:
1.185 tb 994: return ret;
1.7 deraadt 995: }
1.1 deraadt 996:
1.11 ericj 997: /*
1.21 ericj 998: * local_listen()
1.67 jmc 999: * Returns a socket listening on a local port, binds to specified source
1000: * address. Returns -1 on failure.
1.11 ericj 1001: */
1.21 ericj 1002: int
1.194 bluhm 1003: local_listen(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 1004: {
1005: struct addrinfo *res, *res0;
1.163 bcook 1006: int s = -1, ret, x = 1, save_errno;
1.21 ericj 1007: int error;
1.6 deraadt 1008:
1.67 jmc 1009: /* Allow nodename to be null. */
1.21 ericj 1010: hints.ai_flags |= AI_PASSIVE;
1.7 deraadt 1011:
1.21 ericj 1012: /*
1013: * In the case of binding to a wildcard address
1014: * default to binding to an ipv4 address.
1015: */
1016: if (host == NULL && hints.ai_family == AF_UNSPEC)
1017: hints.ai_family = AF_INET;
1.1 deraadt 1018:
1.161 halex 1019: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.70 deraadt 1020: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.14 ericj 1021:
1.161 halex 1022: for (res = res0; res; res = res->ai_next) {
1023: if ((s = socket(res->ai_family, res->ai_socktype,
1024: res->ai_protocol)) < 0)
1.21 ericj 1025: continue;
1.93 claudio 1026:
1.21 ericj 1027: ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
1028: if (ret == -1)
1.30 smart 1029: err(1, NULL);
1.81 marius 1030:
1.161 halex 1031: set_common_sockopts(s, res->ai_family);
1.1 deraadt 1032:
1.161 halex 1033: if (bind(s, (struct sockaddr *)res->ai_addr,
1034: res->ai_addrlen) == 0)
1.21 ericj 1035: break;
1.1 deraadt 1036:
1.155 deraadt 1037: save_errno = errno;
1.21 ericj 1038: close(s);
1.155 deraadt 1039: errno = save_errno;
1.21 ericj 1040: s = -1;
1.161 halex 1041: }
1.1 deraadt 1042:
1.47 ericj 1043: if (!uflag && s != -1) {
1.21 ericj 1044: if (listen(s, 1) < 0)
1.57 stevesk 1045: err(1, "listen");
1.12 ericj 1046: }
1.198 ! bluhm 1047: if (vflag && s != -1) {
! 1048: struct sockaddr_storage ss;
! 1049: socklen_t len;
! 1050:
! 1051: len = sizeof(ss);
! 1052: if (getsockname(s, (struct sockaddr *)&ss, &len) == -1)
! 1053: err(1, "getsockname");
! 1054: report_sock(uflag ? "Bound" : "Listening",
! 1055: (struct sockaddr *)&ss, len, NULL);
! 1056: }
1.1 deraadt 1057:
1.161 halex 1058: freeaddrinfo(res0);
1.1 deraadt 1059:
1.185 tb 1060: return s;
1.7 deraadt 1061: }
1062:
1.11 ericj 1063: /*
1.21 ericj 1064: * readwrite()
1065: * Loop that polls on the network file descriptor and stdin.
1.11 ericj 1066: */
1.21 ericj 1067: void
1.133 beck 1068: readwrite(int net_fd, struct tls *tls_ctx)
1.6 deraadt 1069: {
1.125 tedu 1070: struct pollfd pfd[4];
1071: int stdin_fd = STDIN_FILENO;
1072: int stdout_fd = STDOUT_FILENO;
1073: unsigned char netinbuf[BUFSIZE];
1074: size_t netinbufpos = 0;
1075: unsigned char stdinbuf[BUFSIZE];
1076: size_t stdinbufpos = 0;
1.130 chl 1077: int n, num_fds;
1.125 tedu 1078: ssize_t ret;
1079:
1080: /* don't read from stdin if requested */
1081: if (dflag)
1082: stdin_fd = -1;
1083:
1084: /* stdin */
1085: pfd[POLL_STDIN].fd = stdin_fd;
1086: pfd[POLL_STDIN].events = POLLIN;
1087:
1088: /* network out */
1089: pfd[POLL_NETOUT].fd = net_fd;
1090: pfd[POLL_NETOUT].events = 0;
1091:
1092: /* network in */
1093: pfd[POLL_NETIN].fd = net_fd;
1094: pfd[POLL_NETIN].events = POLLIN;
1095:
1096: /* stdout */
1097: pfd[POLL_STDOUT].fd = stdout_fd;
1098: pfd[POLL_STDOUT].events = 0;
1099:
1100: while (1) {
1101: /* both inputs are gone, buffers are empty, we are done */
1.134 deraadt 1102: if (pfd[POLL_STDIN].fd == -1 && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1103: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1104: return;
1105: /* both outputs are gone, we can't continue */
1.174 bluhm 1106: if (pfd[POLL_NETOUT].fd == -1 && pfd[POLL_STDOUT].fd == -1)
1.125 tedu 1107: return;
1108: /* listen and net in gone, queues empty, done */
1.134 deraadt 1109: if (lflag && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1110: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1111: return;
1.21 ericj 1112:
1.125 tedu 1113: /* help says -i is for "wait between lines sent". We read and
1114: * write arbitrary amounts of data, and we don't want to start
1115: * scanning for newlines, so this is as good as it gets */
1.21 ericj 1116: if (iflag)
1117: sleep(iflag);
1118:
1.125 tedu 1119: /* poll */
1120: num_fds = poll(pfd, 4, timeout);
1121:
1122: /* treat poll errors */
1.174 bluhm 1123: if (num_fds == -1)
1.125 tedu 1124: err(1, "polling error");
1.49 hugh 1125:
1.125 tedu 1126: /* timeout happened */
1127: if (num_fds == 0)
1.49 hugh 1128: return;
1.21 ericj 1129:
1.125 tedu 1130: /* treat socket error conditions */
1131: for (n = 0; n < 4; n++) {
1132: if (pfd[n].revents & (POLLERR|POLLNVAL)) {
1133: pfd[n].fd = -1;
1.6 deraadt 1134: }
1.21 ericj 1135: }
1.125 tedu 1136: /* reading is possible after HUP */
1137: if (pfd[POLL_STDIN].events & POLLIN &&
1138: pfd[POLL_STDIN].revents & POLLHUP &&
1.134 deraadt 1139: !(pfd[POLL_STDIN].revents & POLLIN))
1140: pfd[POLL_STDIN].fd = -1;
1.125 tedu 1141:
1142: if (pfd[POLL_NETIN].events & POLLIN &&
1143: pfd[POLL_NETIN].revents & POLLHUP &&
1.134 deraadt 1144: !(pfd[POLL_NETIN].revents & POLLIN))
1145: pfd[POLL_NETIN].fd = -1;
1.125 tedu 1146:
1147: if (pfd[POLL_NETOUT].revents & POLLHUP) {
1148: if (Nflag)
1149: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1150: pfd[POLL_NETOUT].fd = -1;
1151: }
1152: /* if HUP, stop watching stdout */
1153: if (pfd[POLL_STDOUT].revents & POLLHUP)
1154: pfd[POLL_STDOUT].fd = -1;
1155: /* if no net out, stop watching stdin */
1156: if (pfd[POLL_NETOUT].fd == -1)
1157: pfd[POLL_STDIN].fd = -1;
1158: /* if no stdout, stop watching net in */
1159: if (pfd[POLL_STDOUT].fd == -1) {
1160: if (pfd[POLL_NETIN].fd != -1)
1161: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1162: pfd[POLL_NETIN].fd = -1;
1163: }
1.21 ericj 1164:
1.125 tedu 1165: /* try to read from stdin */
1166: if (pfd[POLL_STDIN].revents & POLLIN && stdinbufpos < BUFSIZE) {
1167: ret = fillbuf(pfd[POLL_STDIN].fd, stdinbuf,
1.133 beck 1168: &stdinbufpos, NULL);
1169: if (ret == TLS_WANT_POLLIN)
1170: pfd[POLL_STDIN].events = POLLIN;
1171: else if (ret == TLS_WANT_POLLOUT)
1172: pfd[POLL_STDIN].events = POLLOUT;
1173: else if (ret == 0 || ret == -1)
1.125 tedu 1174: pfd[POLL_STDIN].fd = -1;
1175: /* read something - poll net out */
1176: if (stdinbufpos > 0)
1177: pfd[POLL_NETOUT].events = POLLOUT;
1178: /* filled buffer - remove self from polling */
1179: if (stdinbufpos == BUFSIZE)
1180: pfd[POLL_STDIN].events = 0;
1181: }
1182: /* try to write to network */
1183: if (pfd[POLL_NETOUT].revents & POLLOUT && stdinbufpos > 0) {
1184: ret = drainbuf(pfd[POLL_NETOUT].fd, stdinbuf,
1.133 beck 1185: &stdinbufpos, tls_ctx);
1186: if (ret == TLS_WANT_POLLIN)
1187: pfd[POLL_NETOUT].events = POLLIN;
1188: else if (ret == TLS_WANT_POLLOUT)
1189: pfd[POLL_NETOUT].events = POLLOUT;
1190: else if (ret == -1)
1.125 tedu 1191: pfd[POLL_NETOUT].fd = -1;
1192: /* buffer empty - remove self from polling */
1193: if (stdinbufpos == 0)
1194: pfd[POLL_NETOUT].events = 0;
1195: /* buffer no longer full - poll stdin again */
1196: if (stdinbufpos < BUFSIZE)
1197: pfd[POLL_STDIN].events = POLLIN;
1198: }
1199: /* try to read from network */
1200: if (pfd[POLL_NETIN].revents & POLLIN && netinbufpos < BUFSIZE) {
1201: ret = fillbuf(pfd[POLL_NETIN].fd, netinbuf,
1.133 beck 1202: &netinbufpos, tls_ctx);
1203: if (ret == TLS_WANT_POLLIN)
1204: pfd[POLL_NETIN].events = POLLIN;
1205: else if (ret == TLS_WANT_POLLOUT)
1206: pfd[POLL_NETIN].events = POLLOUT;
1207: else if (ret == -1)
1.125 tedu 1208: pfd[POLL_NETIN].fd = -1;
1209: /* eof on net in - remove from pfd */
1210: if (ret == 0) {
1211: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1212: pfd[POLL_NETIN].fd = -1;
1.50 vincent 1213: }
1.182 bluhm 1214: if (recvlimit > 0 && ++recvcount >= recvlimit) {
1215: if (pfd[POLL_NETIN].fd != -1)
1216: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1217: pfd[POLL_NETIN].fd = -1;
1218: pfd[POLL_STDIN].fd = -1;
1219: }
1.125 tedu 1220: /* read something - poll stdout */
1221: if (netinbufpos > 0)
1222: pfd[POLL_STDOUT].events = POLLOUT;
1223: /* filled buffer - remove self from polling */
1224: if (netinbufpos == BUFSIZE)
1225: pfd[POLL_NETIN].events = 0;
1226: /* handle telnet */
1227: if (tflag)
1228: atelnet(pfd[POLL_NETIN].fd, netinbuf,
1229: netinbufpos);
1230: }
1231: /* try to write to stdout */
1232: if (pfd[POLL_STDOUT].revents & POLLOUT && netinbufpos > 0) {
1233: ret = drainbuf(pfd[POLL_STDOUT].fd, netinbuf,
1.133 beck 1234: &netinbufpos, NULL);
1235: if (ret == TLS_WANT_POLLIN)
1236: pfd[POLL_STDOUT].events = POLLIN;
1237: else if (ret == TLS_WANT_POLLOUT)
1238: pfd[POLL_STDOUT].events = POLLOUT;
1239: else if (ret == -1)
1.125 tedu 1240: pfd[POLL_STDOUT].fd = -1;
1241: /* buffer empty - remove self from polling */
1242: if (netinbufpos == 0)
1243: pfd[POLL_STDOUT].events = 0;
1244: /* buffer no longer full - poll net in again */
1245: if (netinbufpos < BUFSIZE)
1246: pfd[POLL_NETIN].events = POLLIN;
1247: }
1248:
1249: /* stdin gone and queue empty? */
1250: if (pfd[POLL_STDIN].fd == -1 && stdinbufpos == 0) {
1251: if (pfd[POLL_NETOUT].fd != -1 && Nflag)
1252: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1253: pfd[POLL_NETOUT].fd = -1;
1254: }
1255: /* net in gone and queue empty? */
1256: if (pfd[POLL_NETIN].fd == -1 && netinbufpos == 0) {
1257: pfd[POLL_STDOUT].fd = -1;
1.21 ericj 1258: }
1.11 ericj 1259: }
1.125 tedu 1260: }
1261:
1262: ssize_t
1.133 beck 1263: drainbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1264: {
1265: ssize_t n;
1266: ssize_t adjust;
1267:
1.133 beck 1268: if (tls)
1269: n = tls_write(tls, buf, *bufpos);
1270: else {
1271: n = write(fd, buf, *bufpos);
1272: /* don't treat EAGAIN, EINTR as error */
1273: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1274: n = TLS_WANT_POLLOUT;
1275: }
1.125 tedu 1276: if (n <= 0)
1277: return n;
1278: /* adjust buffer */
1279: adjust = *bufpos - n;
1280: if (adjust > 0)
1281: memmove(buf, buf + n, adjust);
1282: *bufpos -= n;
1283: return n;
1284: }
1285:
1286: ssize_t
1.133 beck 1287: fillbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1288: {
1289: size_t num = BUFSIZE - *bufpos;
1290: ssize_t n;
1291:
1.133 beck 1292: if (tls)
1293: n = tls_read(tls, buf + *bufpos, num);
1294: else {
1295: n = read(fd, buf + *bufpos, num);
1296: /* don't treat EAGAIN, EINTR as error */
1297: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1298: n = TLS_WANT_POLLIN;
1299: }
1.125 tedu 1300: if (n <= 0)
1301: return n;
1302: *bufpos += n;
1303: return n;
1.113 djm 1304: }
1305:
1306: /*
1307: * fdpass()
1308: * Pass the connected file descriptor to stdout and exit.
1309: */
1310: void
1311: fdpass(int nfd)
1312: {
1313: struct msghdr mh;
1314: union {
1315: struct cmsghdr hdr;
1316: char buf[CMSG_SPACE(sizeof(int))];
1317: } cmsgbuf;
1318: struct cmsghdr *cmsg;
1319: struct iovec iov;
1320: char c = '\0';
1321: ssize_t r;
1322: struct pollfd pfd;
1323:
1324: /* Avoid obvious stupidity */
1325: if (isatty(STDOUT_FILENO))
1326: errx(1, "Cannot pass file descriptor to tty");
1327:
1328: bzero(&mh, sizeof(mh));
1329: bzero(&cmsgbuf, sizeof(cmsgbuf));
1330: bzero(&iov, sizeof(iov));
1331:
1332: mh.msg_control = (caddr_t)&cmsgbuf.buf;
1333: mh.msg_controllen = sizeof(cmsgbuf.buf);
1334: cmsg = CMSG_FIRSTHDR(&mh);
1335: cmsg->cmsg_len = CMSG_LEN(sizeof(int));
1336: cmsg->cmsg_level = SOL_SOCKET;
1337: cmsg->cmsg_type = SCM_RIGHTS;
1338: *(int *)CMSG_DATA(cmsg) = nfd;
1339:
1340: iov.iov_base = &c;
1341: iov.iov_len = 1;
1342: mh.msg_iov = &iov;
1343: mh.msg_iovlen = 1;
1344:
1345: bzero(&pfd, sizeof(pfd));
1346: pfd.fd = STDOUT_FILENO;
1.128 tobias 1347: pfd.events = POLLOUT;
1.113 djm 1348: for (;;) {
1349: r = sendmsg(STDOUT_FILENO, &mh, 0);
1350: if (r == -1) {
1351: if (errno == EAGAIN || errno == EINTR) {
1352: if (poll(&pfd, 1, -1) == -1)
1353: err(1, "poll");
1354: continue;
1355: }
1356: err(1, "sendmsg");
1.128 tobias 1357: } else if (r != 1)
1.113 djm 1358: errx(1, "sendmsg: unexpected return value %zd", r);
1359: else
1360: break;
1361: }
1362: exit(0);
1.7 deraadt 1363: }
1.50 vincent 1364:
1.67 jmc 1365: /* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */
1.21 ericj 1366: void
1.37 jakob 1367: atelnet(int nfd, unsigned char *buf, unsigned int size)
1.6 deraadt 1368: {
1.24 ericj 1369: unsigned char *p, *end;
1370: unsigned char obuf[4];
1371:
1.95 nicm 1372: if (size < 3)
1373: return;
1374: end = buf + size - 2;
1.24 ericj 1375:
1376: for (p = buf; p < end; p++) {
1.21 ericj 1377: if (*p != IAC)
1.95 nicm 1378: continue;
1.24 ericj 1379:
1.25 ericj 1380: obuf[0] = IAC;
1.24 ericj 1381: p++;
1.50 vincent 1382: if ((*p == WILL) || (*p == WONT))
1.24 ericj 1383: obuf[1] = DONT;
1.95 nicm 1384: else if ((*p == DO) || (*p == DONT))
1.24 ericj 1385: obuf[1] = WONT;
1.95 nicm 1386: else
1387: continue;
1388:
1389: p++;
1390: obuf[2] = *p;
1391: if (atomicio(vwrite, nfd, obuf, 3) != 3)
1392: warn("Write Error!");
1.11 ericj 1393: }
1.7 deraadt 1394: }
1395:
1.153 beck 1396:
1397: int
1398: strtoport(char *portstr, int udp)
1399: {
1400: struct servent *entry;
1401: const char *errstr;
1402: char *proto;
1403: int port = -1;
1404:
1405: proto = udp ? "udp" : "tcp";
1406:
1407: port = strtonum(portstr, 1, PORT_MAX, &errstr);
1408: if (errstr == NULL)
1409: return port;
1410: if (errno != EINVAL)
1411: errx(1, "port number %s: %s", errstr, portstr);
1412: if ((entry = getservbyname(portstr, proto)) == NULL)
1413: errx(1, "service \"%s\" unknown", portstr);
1414: return ntohs(entry->s_port);
1415: }
1416:
1.11 ericj 1417: /*
1.21 ericj 1418: * build_ports()
1.105 lum 1419: * Build an array of ports in portlist[], listing each port
1.67 jmc 1420: * that we should try to connect to.
1.11 ericj 1421: */
1.21 ericj 1422: void
1.37 jakob 1423: build_ports(char *p)
1.6 deraadt 1424: {
1.88 ray 1425: char *n;
1.21 ericj 1426: int hi, lo, cp;
1427: int x = 0;
1428:
1429: if ((n = strchr(p, '-')) != NULL) {
1430: *n = '\0';
1431: n++;
1432:
1.67 jmc 1433: /* Make sure the ports are in order: lowest->highest. */
1.153 beck 1434: hi = strtoport(n, uflag);
1435: lo = strtoport(p, uflag);
1.21 ericj 1436: if (lo > hi) {
1437: cp = hi;
1438: hi = lo;
1439: lo = cp;
1440: }
1441:
1.145 tb 1442: /*
1443: * Initialize portlist with a random permutation. Based on
1444: * Knuth, as in ip_randomid() in sys/netinet/ip_id.c.
1445: */
1.21 ericj 1446: if (rflag) {
1.145 tb 1447: for (x = 0; x <= hi - lo; x++) {
1448: cp = arc4random_uniform(x + 1);
1449: portlist[x] = portlist[cp];
1450: if (asprintf(&portlist[cp], "%d", x + lo) < 0)
1451: err(1, "asprintf");
1452: }
1453: } else { /* Load ports sequentially. */
1454: for (cp = lo; cp <= hi; cp++) {
1455: if (asprintf(&portlist[x], "%d", cp) < 0)
1456: err(1, "asprintf");
1457: x++;
1.6 deraadt 1458: }
1.11 ericj 1459: }
1.21 ericj 1460: } else {
1.153 beck 1461: char *tmp;
1462:
1463: hi = strtoport(p, uflag);
1464: if (asprintf(&tmp, "%d", hi) != -1)
1465: portlist[0] = tmp;
1466: else
1.55 fgsch 1467: err(1, NULL);
1.11 ericj 1468: }
1.13 ericj 1469: }
1470:
1471: /*
1.21 ericj 1472: * udptest()
1473: * Do a few writes to see if the UDP port is there.
1.105 lum 1474: * Fails once PF state table is full.
1.13 ericj 1475: */
1.21 ericj 1476: int
1.37 jakob 1477: udptest(int s)
1.13 ericj 1478: {
1.74 deraadt 1479: int i, ret;
1.13 ericj 1480:
1.52 vincent 1481: for (i = 0; i <= 3; i++) {
1.74 deraadt 1482: if (write(s, "X", 1) == 1)
1.21 ericj 1483: ret = 1;
1.14 ericj 1484: else
1.21 ericj 1485: ret = -1;
1.14 ericj 1486: }
1.185 tb 1487: return ret;
1.81 marius 1488: }
1489:
1.84 dtucker 1490: void
1.127 jca 1491: set_common_sockopts(int s, int af)
1.81 marius 1492: {
1493: int x = 1;
1494:
1495: if (Sflag) {
1496: if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
1497: &x, sizeof(x)) == -1)
1498: err(1, NULL);
1499: }
1500: if (Dflag) {
1501: if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
1502: &x, sizeof(x)) == -1)
1503: err(1, NULL);
1504: }
1.83 dtucker 1505: if (Tflag != -1) {
1.157 bcook 1506: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1507: IP_TOS, &Tflag, sizeof(Tflag)) == -1)
1508: err(1, "set IP ToS");
1.127 jca 1509:
1.157 bcook 1510: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1511: IPV6_TCLASS, &Tflag, sizeof(Tflag)) == -1)
1512: err(1, "set IPv6 traffic class");
1.83 dtucker 1513: }
1.90 djm 1514: if (Iflag) {
1515: if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
1516: &Iflag, sizeof(Iflag)) == -1)
1517: err(1, "set TCP receive buffer size");
1518: }
1519: if (Oflag) {
1520: if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
1521: &Oflag, sizeof(Oflag)) == -1)
1522: err(1, "set TCP send buffer size");
1523: }
1.157 bcook 1524:
1525: if (ttl != -1) {
1526: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1527: IP_TTL, &ttl, sizeof(ttl)))
1528: err(1, "set IP TTL");
1529:
1530: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1531: IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)))
1532: err(1, "set IPv6 unicast hops");
1533: }
1534:
1535: if (minttl != -1) {
1536: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1537: IP_MINTTL, &minttl, sizeof(minttl)))
1538: err(1, "set IP min TTL");
1539:
1540: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1541: IPV6_MINHOPCOUNT, &minttl, sizeof(minttl)))
1542: err(1, "set IPv6 min hop count");
1.156 jca 1543: }
1.83 dtucker 1544: }
1545:
1546: int
1.189 jsing 1547: process_tos_opt(char *s, int *val)
1.83 dtucker 1548: {
1.102 haesbaer 1549: /* DiffServ Codepoints and other TOS mappings */
1550: const struct toskeywords {
1551: const char *keyword;
1552: int val;
1553: } *t, toskeywords[] = {
1554: { "af11", IPTOS_DSCP_AF11 },
1555: { "af12", IPTOS_DSCP_AF12 },
1556: { "af13", IPTOS_DSCP_AF13 },
1557: { "af21", IPTOS_DSCP_AF21 },
1558: { "af22", IPTOS_DSCP_AF22 },
1559: { "af23", IPTOS_DSCP_AF23 },
1560: { "af31", IPTOS_DSCP_AF31 },
1561: { "af32", IPTOS_DSCP_AF32 },
1562: { "af33", IPTOS_DSCP_AF33 },
1563: { "af41", IPTOS_DSCP_AF41 },
1564: { "af42", IPTOS_DSCP_AF42 },
1565: { "af43", IPTOS_DSCP_AF43 },
1566: { "critical", IPTOS_PREC_CRITIC_ECP },
1567: { "cs0", IPTOS_DSCP_CS0 },
1568: { "cs1", IPTOS_DSCP_CS1 },
1569: { "cs2", IPTOS_DSCP_CS2 },
1570: { "cs3", IPTOS_DSCP_CS3 },
1571: { "cs4", IPTOS_DSCP_CS4 },
1572: { "cs5", IPTOS_DSCP_CS5 },
1573: { "cs6", IPTOS_DSCP_CS6 },
1574: { "cs7", IPTOS_DSCP_CS7 },
1575: { "ef", IPTOS_DSCP_EF },
1576: { "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
1577: { "lowdelay", IPTOS_LOWDELAY },
1578: { "netcontrol", IPTOS_PREC_NETCONTROL },
1579: { "reliability", IPTOS_RELIABILITY },
1580: { "throughput", IPTOS_THROUGHPUT },
1.134 deraadt 1581: { NULL, -1 },
1.102 haesbaer 1582: };
1583:
1584: for (t = toskeywords; t->keyword != NULL; t++) {
1585: if (strcmp(s, t->keyword) == 0) {
1586: *val = t->val;
1.185 tb 1587: return 1;
1.102 haesbaer 1588: }
1589: }
1.83 dtucker 1590:
1.185 tb 1591: return 0;
1.108 haesbaer 1592: }
1593:
1.133 beck 1594: int
1.189 jsing 1595: process_tls_opt(char *s, int *flags)
1.133 beck 1596: {
1.189 jsing 1597: size_t len;
1598: char *v;
1599:
1.133 beck 1600: const struct tlskeywords {
1601: const char *keyword;
1.189 jsing 1602: int flag;
1603: char **value;
1.133 beck 1604: } *t, tlskeywords[] = {
1.189 jsing 1605: { "ciphers", -1, &tls_ciphers },
1606: { "clientcert", TLS_CCERT, NULL },
1607: { "muststaple", TLS_MUSTSTAPLE, NULL },
1608: { "noverify", TLS_NOVERIFY, NULL },
1609: { "noname", TLS_NONAME, NULL },
1610: { "protocols", -1, &tls_protocols },
1611: { NULL, -1, NULL },
1.133 beck 1612: };
1613:
1.189 jsing 1614: len = strlen(s);
1615: if ((v = strchr(s, '=')) != NULL) {
1616: len = v - s;
1617: v++;
1618: }
1619:
1.133 beck 1620: for (t = tlskeywords; t->keyword != NULL; t++) {
1.189 jsing 1621: if (strlen(t->keyword) == len &&
1622: strncmp(s, t->keyword, len) == 0) {
1623: if (t->value != NULL) {
1624: if (v == NULL)
1625: errx(1, "invalid tls value `%s'", s);
1626: *t->value = v;
1627: } else {
1628: *flags |= t->flag;
1629: }
1.185 tb 1630: return 1;
1.133 beck 1631: }
1632: }
1.185 tb 1633: return 0;
1.179 beck 1634: }
1635:
1636: void
1637: save_peer_cert(struct tls *tls_ctx, FILE *fp)
1638: {
1639: const char *pem;
1640: size_t plen;
1641:
1642: if ((pem = tls_peer_cert_chain_pem(tls_ctx, &plen)) == NULL)
1643: errx(1, "Can't get peer certificate");
1.183 bluhm 1644: if (fprintf(fp, "%.*s", (int)plen, pem) < 0)
1.179 beck 1645: err(1, "unable to save peer cert");
1646: if (fflush(fp) != 0)
1647: err(1, "unable to flush peer cert");
1.133 beck 1648: }
1649:
1650: void
1.183 bluhm 1651: report_tls(struct tls * tls_ctx, char * host)
1.133 beck 1652: {
1.147 beck 1653: time_t t;
1.164 beck 1654: const char *ocsp_url;
1655:
1.138 beck 1656: fprintf(stderr, "TLS handshake negotiated %s/%s with host %s\n",
1657: tls_conn_version(tls_ctx), tls_conn_cipher(tls_ctx), host);
1.148 mmcc 1658: fprintf(stderr, "Peer name: %s\n",
1.133 beck 1659: tls_expectname ? tls_expectname : host);
1.137 beck 1660: if (tls_peer_cert_subject(tls_ctx))
1661: fprintf(stderr, "Subject: %s\n",
1662: tls_peer_cert_subject(tls_ctx));
1663: if (tls_peer_cert_issuer(tls_ctx))
1664: fprintf(stderr, "Issuer: %s\n",
1665: tls_peer_cert_issuer(tls_ctx));
1.147 beck 1666: if ((t = tls_peer_cert_notbefore(tls_ctx)) != -1)
1667: fprintf(stderr, "Valid From: %s", ctime(&t));
1668: if ((t = tls_peer_cert_notafter(tls_ctx)) != -1)
1669: fprintf(stderr, "Valid Until: %s", ctime(&t));
1.137 beck 1670: if (tls_peer_cert_hash(tls_ctx))
1671: fprintf(stderr, "Cert Hash: %s\n",
1672: tls_peer_cert_hash(tls_ctx));
1.164 beck 1673: ocsp_url = tls_peer_ocsp_url(tls_ctx);
1.166 beck 1674: if (ocsp_url != NULL)
1675: fprintf(stderr, "OCSP URL: %s\n", ocsp_url);
1.164 beck 1676: switch (tls_peer_ocsp_response_status(tls_ctx)) {
1677: case TLS_OCSP_RESPONSE_SUCCESSFUL:
1.165 beck 1678: fprintf(stderr, "OCSP Stapling: %s\n",
1.164 beck 1679: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1680: tls_peer_ocsp_result(tls_ctx));
1681: fprintf(stderr,
1682: " response_status=%d cert_status=%d crl_reason=%d\n",
1683: tls_peer_ocsp_response_status(tls_ctx),
1684: tls_peer_ocsp_cert_status(tls_ctx),
1685: tls_peer_ocsp_crl_reason(tls_ctx));
1686: t = tls_peer_ocsp_this_update(tls_ctx);
1687: fprintf(stderr, " this update: %s",
1688: t != -1 ? ctime(&t) : "\n");
1689: t = tls_peer_ocsp_next_update(tls_ctx);
1690: fprintf(stderr, " next update: %s",
1691: t != -1 ? ctime(&t) : "\n");
1692: t = tls_peer_ocsp_revocation_time(tls_ctx);
1693: fprintf(stderr, " revocation: %s",
1694: t != -1 ? ctime(&t) : "\n");
1695: break;
1696: case -1:
1697: break;
1698: default:
1.165 beck 1699: fprintf(stderr, "OCSP Stapling: failure - response_status %d (%s)\n",
1.164 beck 1700: tls_peer_ocsp_response_status(tls_ctx),
1701: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1702: tls_peer_ocsp_result(tls_ctx));
1703: break;
1704:
1705: }
1.133 beck 1706: }
1.147 beck 1707:
1.108 haesbaer 1708: void
1.198 ! bluhm 1709: report_sock(const char *msg, const struct sockaddr *sa, socklen_t salen,
! 1710: char *path)
1.108 haesbaer 1711: {
1.198 ! bluhm 1712: char host[NI_MAXHOST], port[NI_MAXSERV];
1.108 haesbaer 1713: int herr;
1714: int flags = NI_NUMERICSERV;
1.151 beck 1715:
1716: if (path != NULL) {
1.198 ! bluhm 1717: fprintf(stderr, "%s on %s\n", msg, path);
1.151 beck 1718: return;
1719: }
1.134 deraadt 1720:
1.108 haesbaer 1721: if (nflag)
1722: flags |= NI_NUMERICHOST;
1.134 deraadt 1723:
1.198 ! bluhm 1724: if ((herr = getnameinfo(sa, salen, host, sizeof(host),
! 1725: port, sizeof(port), flags)) != 0) {
1.108 haesbaer 1726: if (herr == EAI_SYSTEM)
1727: err(1, "getnameinfo");
1728: else
1729: errx(1, "getnameinfo: %s", gai_strerror(herr));
1730: }
1.134 deraadt 1731:
1.198 ! bluhm 1732: fprintf(stderr, "%s on %s %s\n", msg, host, port);
1.7 deraadt 1733: }
1.1 deraadt 1734:
1.11 ericj 1735: void
1.58 deraadt 1736: help(void)
1.1 deraadt 1737: {
1.21 ericj 1738: usage(0);
1739: fprintf(stderr, "\tCommand Summary:\n\
1740: \t-4 Use IPv4\n\
1741: \t-6 Use IPv6\n\
1.135 jmc 1742: \t-C certfile Public key file\n\
1743: \t-c Use TLS\n\
1.73 markus 1744: \t-D Enable the debug socket option\n\
1.69 tedu 1745: \t-d Detach from stdin\n\
1.135 jmc 1746: \t-e name\t Required name in peer certificate\n\
1.114 jmc 1747: \t-F Pass socket fd\n\
1.135 jmc 1748: \t-H hash\t Hash string of peer certificate\n\
1.21 ericj 1749: \t-h This help text\n\
1.90 djm 1750: \t-I length TCP receive buffer length\n\
1.135 jmc 1751: \t-i interval Delay interval for lines sent, ports scanned\n\
1752: \t-K keyfile Private key file\n\
1.21 ericj 1753: \t-k Keep inbound sockets open for multiple connects\n\
1754: \t-l Listen mode, for inbound connects\n\
1.156 jca 1755: \t-M ttl Outgoing TTL / Hop Limit\n\
1756: \t-m minttl Minimum incoming TTL / Hop Limit\n\
1.111 sthen 1757: \t-N Shutdown the network socket after EOF on stdin\n\
1.22 jasoni 1758: \t-n Suppress name/port resolutions\n\
1.90 djm 1759: \t-O length TCP send buffer length\n\
1.169 jmc 1760: \t-o staplefile Staple file\n\
1.86 djm 1761: \t-P proxyuser\tUsername for proxy authentication\n\
1.36 jakob 1762: \t-p port\t Specify local port for remote connects\n\
1.135 jmc 1763: \t-R CAfile CA bundle\n\
1.21 ericj 1764: \t-r Randomize remote ports\n\
1.67 jmc 1765: \t-S Enable the TCP MD5 signature option\n\
1.135 jmc 1766: \t-s source Local source address\n\
1767: \t-T keyword TOS value or TLS options\n\
1.21 ericj 1768: \t-t Answer TELNET negotiation\n\
1.67 jmc 1769: \t-U Use UNIX domain socket\n\
1.21 ericj 1770: \t-u UDP mode\n\
1.98 guenther 1771: \t-V rtable Specify alternate routing table\n\
1.21 ericj 1772: \t-v Verbose\n\
1.182 bluhm 1773: \t-W recvlimit Terminate after receiving a number of packets\n\
1.135 jmc 1774: \t-w timeout Timeout for connects and final net reads\n\
1.75 djm 1775: \t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
1776: \t-x addr[:port]\tSpecify proxy address and port\n\
1.180 jmc 1777: \t-Z Peer certificate file\n\
1.21 ericj 1778: \t-z Zero-I/O mode [used for scanning]\n\
1779: Port numbers can be individual or ranges: lo-hi [inclusive]\n");
1780: exit(1);
1.11 ericj 1781: }
1782:
1783: void
1.37 jakob 1784: usage(int ret)
1.11 ericj 1785: {
1.92 sobrado 1786: fprintf(stderr,
1.135 jmc 1787: "usage: nc [-46cDdFhklNnrStUuvz] [-C certfile] [-e name] "
1788: "[-H hash] [-I length]\n"
1.156 jca 1789: "\t [-i interval] [-K keyfile] [-M ttl] [-m minttl] [-O length]\n"
1.169 jmc 1790: "\t [-o staplefile] [-P proxy_username] [-p source_port] "
1791: "[-R CAfile]\n"
1.182 bluhm 1792: "\t [-s source] [-T keyword] [-V rtable] [-W recvlimit] "
1793: "[-w timeout]\n"
1794: "\t [-X proxy_protocol] [-x proxy_address[:port]] "
1795: "[-Z peercertfile]\n"
1796: "\t [destination] [port]\n");
1.21 ericj 1797: if (ret)
1798: exit(1);
1.7 deraadt 1799: }
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