Annotation of src/usr.bin/nc/netcat.c, Revision 1.206
1.206 ! mestre 1: /* $OpenBSD: netcat.c,v 1.205 2019/06/28 13:35:02 deraadt 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 {
1.206 ! mestre 386: /* no filesystem visibility */
1.192 deraadt 387: if (unveil("/", "") == -1)
388: err(1, "unveil");
389: }
390: }
1.191 beck 391:
1.142 benno 392: if (family == AF_UNIX) {
1.140 beck 393: if (pledge("stdio rpath wpath cpath tmppath unix", NULL) == -1)
394: err(1, "pledge");
1.186 tb 395: } else if (Fflag && Pflag) {
396: if (pledge("stdio inet dns sendfd tty", NULL) == -1)
397: err(1, "pledge");
1.191 beck 398: } else if (Fflag) {
1.186 tb 399: if (pledge("stdio inet dns sendfd", NULL) == -1)
1.152 beck 400: err(1, "pledge");
1.184 tb 401: } else if (Pflag && usetls) {
402: if (pledge("stdio rpath inet dns tty", NULL) == -1)
403: err(1, "pledge");
1.152 beck 404: } else if (Pflag) {
405: if (pledge("stdio inet dns tty", NULL) == -1)
1.140 beck 406: err(1, "pledge");
1.143 deraadt 407: } else if (usetls) {
1.140 beck 408: if (pledge("stdio rpath inet dns", NULL) == -1)
409: err(1, "pledge");
1.143 deraadt 410: } else if (pledge("stdio inet dns", NULL) == -1)
1.140 beck 411: err(1, "pledge");
1.1 deraadt 412:
1.21 ericj 413: if (lflag && sflag)
414: errx(1, "cannot use -s and -l");
415: if (lflag && pflag)
416: errx(1, "cannot use -p and -l");
417: if (lflag && zflag)
1.32 ericj 418: errx(1, "cannot use -z and -l");
1.21 ericj 419: if (!lflag && kflag)
1.32 ericj 420: errx(1, "must use -l with -k");
1.133 beck 421: if (uflag && usetls)
422: errx(1, "cannot use -c and -u");
423: if ((family == AF_UNIX) && usetls)
424: errx(1, "cannot use -c and -U");
1.140 beck 425: if ((family == AF_UNIX) && Fflag)
426: errx(1, "cannot use -F and -U");
427: if (Fflag && usetls)
428: errx(1, "cannot use -c and -F");
1.133 beck 429: if (TLSopt && !usetls)
430: errx(1, "you must specify -c to use TLS options");
431: if (Cflag && !usetls)
432: errx(1, "you must specify -c to use -C");
433: if (Kflag && !usetls)
434: errx(1, "you must specify -c to use -K");
1.179 beck 435: if (Zflag && !usetls)
436: errx(1, "you must specify -c to use -Z");
1.168 beck 437: if (oflag && !Cflag)
438: errx(1, "you must specify -C to use -o");
1.133 beck 439: if (tls_cachanged && !usetls)
440: errx(1, "you must specify -c to use -R");
441: if (tls_expecthash && !usetls)
442: errx(1, "you must specify -c to use -H");
443: if (tls_expectname && !usetls)
444: errx(1, "you must specify -c to use -e");
1.21 ericj 445:
1.99 jeremy 446: /* Get name of temporary socket for unix datagram client */
447: if ((family == AF_UNIX) && uflag && !lflag) {
448: if (sflag) {
449: unix_dg_tmp_socket = sflag;
450: } else {
451: strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",
1.136 deraadt 452: UNIX_DG_TMP_SOCKET_SIZE);
1.99 jeremy 453: if (mktemp(unix_dg_tmp_socket_buf) == NULL)
454: err(1, "mktemp");
455: unix_dg_tmp_socket = unix_dg_tmp_socket_buf;
456: }
457: }
458:
1.67 jmc 459: /* Initialize addrinfo structure. */
1.42 ericj 460: if (family != AF_UNIX) {
461: memset(&hints, 0, sizeof(struct addrinfo));
462: hints.ai_family = family;
463: hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
464: hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
465: if (nflag)
466: hints.ai_flags |= AI_NUMERICHOST;
467: }
1.1 deraadt 468:
1.34 jakob 469: if (xflag) {
470: if (uflag)
471: errx(1, "no proxy support for UDP mode");
472:
473: if (lflag)
474: errx(1, "no proxy support for listen");
475:
1.42 ericj 476: if (family == AF_UNIX)
477: errx(1, "no proxy support for unix sockets");
478:
1.34 jakob 479: if (sflag)
480: errx(1, "no proxy support for local source address");
481:
1.172 jca 482: if (*proxy == '[') {
483: ++proxy;
484: proxyport = strchr(proxy, ']');
485: if (proxyport == NULL)
486: errx(1, "missing closing bracket in proxy");
487: *proxyport++ = '\0';
488: if (*proxyport == '\0')
489: /* Use default proxy port. */
490: proxyport = NULL;
491: else {
492: if (*proxyport == ':')
493: ++proxyport;
494: else
495: errx(1, "garbage proxy port delimiter");
496: }
497: } else {
498: proxyport = strrchr(proxy, ':');
499: if (proxyport != NULL)
500: *proxyport++ = '\0';
501: }
1.34 jakob 502:
503: memset(&proxyhints, 0, sizeof(struct addrinfo));
504: proxyhints.ai_family = family;
505: proxyhints.ai_socktype = SOCK_STREAM;
506: proxyhints.ai_protocol = IPPROTO_TCP;
507: if (nflag)
508: proxyhints.ai_flags |= AI_NUMERICHOST;
509: }
510:
1.133 beck 511: if (usetls) {
512: if ((tls_cfg = tls_config_new()) == NULL)
513: errx(1, "unable to allocate TLS config");
1.162 jsing 514: if (Rflag && tls_config_set_ca_file(tls_cfg, Rflag) == -1)
515: errx(1, "%s", tls_config_error(tls_cfg));
516: if (Cflag && tls_config_set_cert_file(tls_cfg, Cflag) == -1)
517: errx(1, "%s", tls_config_error(tls_cfg));
518: if (Kflag && tls_config_set_key_file(tls_cfg, Kflag) == -1)
1.168 beck 519: errx(1, "%s", tls_config_error(tls_cfg));
520: if (oflag && tls_config_set_ocsp_staple_file(tls_cfg, oflag) == -1)
1.162 jsing 521: errx(1, "%s", tls_config_error(tls_cfg));
1.189 jsing 522: if (tls_config_parse_protocols(&protocols, tls_protocols) == -1)
523: errx(1, "invalid TLS protocols `%s'", tls_protocols);
524: if (tls_config_set_protocols(tls_cfg, protocols) == -1)
525: errx(1, "%s", tls_config_error(tls_cfg));
526: if (tls_config_set_ciphers(tls_cfg, tls_ciphers) == -1)
527: errx(1, "%s", tls_config_error(tls_cfg));
1.133 beck 528: if (!lflag && (TLSopt & TLS_CCERT))
529: errx(1, "clientcert is only valid with -l");
530: if (TLSopt & TLS_NONAME)
531: tls_config_insecure_noverifyname(tls_cfg);
532: if (TLSopt & TLS_NOVERIFY) {
533: if (tls_expecthash != NULL)
1.186 tb 534: errx(1, "-H and -T noverify may not be used "
535: "together");
1.133 beck 536: tls_config_insecure_noverifycert(tls_cfg);
537: }
1.167 beck 538: if (TLSopt & TLS_MUSTSTAPLE)
539: tls_config_ocsp_require_stapling(tls_cfg);
1.162 jsing 540:
541: if (Pflag) {
542: if (pledge("stdio inet dns tty", NULL) == -1)
543: err(1, "pledge");
544: } else if (pledge("stdio inet dns", NULL) == -1)
545: err(1, "pledge");
1.133 beck 546: }
1.21 ericj 547: if (lflag) {
1.27 ericj 548: ret = 0;
1.1 deraadt 549:
1.99 jeremy 550: if (family == AF_UNIX) {
551: if (uflag)
1.136 deraadt 552: s = unix_bind(host, 0);
1.99 jeremy 553: else
554: s = unix_listen(host);
555: }
1.42 ericj 556:
1.133 beck 557: if (usetls) {
558: tls_config_verify_client_optional(tls_cfg);
559: if ((tls_ctx = tls_server()) == NULL)
560: errx(1, "tls server creation failed");
561: if (tls_configure(tls_ctx, tls_cfg) == -1)
562: errx(1, "tls configuration failed (%s)",
563: tls_error(tls_ctx));
564: }
1.67 jmc 565: /* Allow only one connection at a time, but stay alive. */
1.21 ericj 566: for (;;) {
1.193 bluhm 567: if (family != AF_UNIX) {
568: if (s != -1)
569: close(s);
1.42 ericj 570: s = local_listen(host, uport, hints);
1.193 bluhm 571: }
1.205 deraadt 572: if (s == -1)
1.30 smart 573: err(1, NULL);
1.181 deraadt 574: if (uflag && kflag) {
575: /*
576: * For UDP and -k, don't connect the socket,
577: * let it receive datagrams from multiple
578: * socket pairs.
579: */
1.133 beck 580: readwrite(s, NULL);
1.181 deraadt 581: } else if (uflag && !kflag) {
582: /*
583: * For UDP and not -k, we will use recvfrom()
584: * initially to wait for a caller, then use
585: * the regular functions to talk to the caller.
586: */
1.188 bluhm 587: int rv;
588: char buf[2048];
1.21 ericj 589: struct sockaddr_storage z;
590:
591: len = sizeof(z);
1.188 bluhm 592: rv = recvfrom(s, buf, sizeof(buf), MSG_PEEK,
1.37 jakob 593: (struct sockaddr *)&z, &len);
1.205 deraadt 594: if (rv == -1)
1.57 stevesk 595: err(1, "recvfrom");
1.21 ericj 596:
1.37 jakob 597: rv = connect(s, (struct sockaddr *)&z, len);
1.205 deraadt 598: if (rv == -1)
1.57 stevesk 599: err(1, "connect");
1.1 deraadt 600:
1.108 haesbaer 601: if (vflag)
1.198 bluhm 602: report_sock("Connection received",
603: (struct sockaddr *)&z, len, NULL);
1.108 haesbaer 604:
1.133 beck 605: readwrite(s, NULL);
1.21 ericj 606: } else {
1.195 bluhm 607: struct tls *tls_cctx = NULL;
608: int connfd;
609:
1.78 otto 610: len = sizeof(cliaddr);
1.132 bluhm 611: connfd = accept4(s, (struct sockaddr *)&cliaddr,
612: &len, SOCK_NONBLOCK);
1.110 deraadt 613: if (connfd == -1) {
614: /* For now, all errnos are fatal */
1.125 tedu 615: err(1, "accept");
1.110 deraadt 616: }
1.108 haesbaer 617: if (vflag)
1.198 bluhm 618: report_sock("Connection received",
619: (struct sockaddr *)&cliaddr, len,
1.151 beck 620: family == AF_UNIX ? host : NULL);
1.133 beck 621: if ((usetls) &&
1.134 deraadt 622: (tls_cctx = tls_setup_server(tls_ctx, connfd, host)))
1.133 beck 623: readwrite(connfd, tls_cctx);
624: if (!usetls)
625: readwrite(connfd, NULL);
1.195 bluhm 626: if (tls_cctx)
1.175 bluhm 627: timeout_tls(s, tls_cctx, tls_close);
1.99 jeremy 628: close(connfd);
1.195 bluhm 629: tls_free(tls_cctx);
1.21 ericj 630: }
1.193 bluhm 631: if (family == AF_UNIX && uflag) {
1.205 deraadt 632: if (connect(s, NULL, 0) == -1)
1.99 jeremy 633: err(1, "connect");
634: }
1.27 ericj 635:
1.21 ericj 636: if (!kflag)
637: break;
1.11 ericj 638: }
1.42 ericj 639: } else if (family == AF_UNIX) {
640: ret = 0;
641:
1.177 bluhm 642: if ((s = unix_connect(host)) > 0) {
643: if (!zflag)
644: readwrite(s, NULL);
1.42 ericj 645: close(s);
1.196 dlg 646: } else {
647: warn("%s", host);
1.42 ericj 648: ret = 1;
1.196 dlg 649: }
1.42 ericj 650:
1.99 jeremy 651: if (uflag)
652: unlink(unix_dg_tmp_socket);
1.185 tb 653: return ret;
1.42 ericj 654:
1.21 ericj 655: } else {
656: int i = 0;
1.6 deraadt 657:
1.67 jmc 658: /* Construct the portlist[] array. */
1.21 ericj 659: build_ports(uport);
1.1 deraadt 660:
1.67 jmc 661: /* Cycle through portlist, connecting to each port. */
1.154 deraadt 662: for (s = -1, i = 0; portlist[i] != NULL; i++) {
663: if (s != -1)
1.21 ericj 664: close(s);
1.195 bluhm 665: tls_free(tls_ctx);
666: tls_ctx = NULL;
1.34 jakob 667:
1.133 beck 668: if (usetls) {
669: if ((tls_ctx = tls_client()) == NULL)
670: errx(1, "tls client creation failed");
671: if (tls_configure(tls_ctx, tls_cfg) == -1)
672: errx(1, "tls configuration failed (%s)",
673: tls_error(tls_ctx));
674: }
1.34 jakob 675: if (xflag)
676: s = socks_connect(host, portlist[i], hints,
1.172 jca 677: proxy, proxyport, proxyhints, socksv,
1.86 djm 678: Pflag);
1.34 jakob 679: else
680: s = remote_connect(host, portlist[i], hints);
681:
1.154 deraadt 682: if (s == -1)
1.21 ericj 683: continue;
1.1 deraadt 684:
1.21 ericj 685: ret = 0;
686: if (vflag || zflag) {
1.67 jmc 687: /* For UDP, make sure we are connected. */
1.21 ericj 688: if (uflag) {
1.50 vincent 689: if (udptest(s) == -1) {
1.21 ericj 690: ret = 1;
691: continue;
692: }
693: }
1.1 deraadt 694:
1.67 jmc 695: /* Don't look up port if -n. */
1.21 ericj 696: if (nflag)
697: sv = NULL;
698: else {
699: sv = getservbyport(
1.37 jakob 700: ntohs(atoi(portlist[i])),
701: uflag ? "udp" : "tcp");
1.21 ericj 702: }
1.50 vincent 703:
1.94 mpf 704: fprintf(stderr,
705: "Connection to %s %s port [%s/%s] "
706: "succeeded!\n", host, portlist[i],
707: uflag ? "udp" : "tcp",
1.37 jakob 708: sv ? sv->s_name : "*");
1.21 ericj 709: }
1.113 djm 710: if (Fflag)
711: fdpass(s);
1.133 beck 712: else {
713: if (usetls)
714: tls_setup_client(tls_ctx, s, host);
715: if (!zflag)
716: readwrite(s, tls_ctx);
1.195 bluhm 717: if (tls_ctx)
1.175 bluhm 718: timeout_tls(s, tls_ctx, tls_close);
1.133 beck 719: }
1.7 deraadt 720: }
1.11 ericj 721: }
1.1 deraadt 722:
1.154 deraadt 723: if (s != -1)
1.21 ericj 724: close(s);
1.195 bluhm 725: tls_free(tls_ctx);
1.133 beck 726: tls_config_free(tls_cfg);
727:
1.185 tb 728: return ret;
1.7 deraadt 729: }
1.1 deraadt 730:
1.11 ericj 731: /*
1.99 jeremy 732: * unix_bind()
733: * Returns a unix socket bound to the given path
1.42 ericj 734: */
735: int
1.136 deraadt 736: unix_bind(char *path, int flags)
1.42 ericj 737: {
1.144 bcook 738: struct sockaddr_un s_un;
1.155 deraadt 739: int s, save_errno;
1.42 ericj 740:
1.99 jeremy 741: /* Create unix domain socket. */
1.136 deraadt 742: if ((s = socket(AF_UNIX, flags | (uflag ? SOCK_DGRAM : SOCK_STREAM),
1.205 deraadt 743: 0)) == -1)
1.185 tb 744: return -1;
1.42 ericj 745:
1.144 bcook 746: memset(&s_un, 0, sizeof(struct sockaddr_un));
747: s_un.sun_family = AF_UNIX;
1.60 avsm 748:
1.144 bcook 749: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
750: sizeof(s_un.sun_path)) {
1.60 avsm 751: close(s);
752: errno = ENAMETOOLONG;
1.185 tb 753: return -1;
1.60 avsm 754: }
1.99 jeremy 755:
1.205 deraadt 756: if (bind(s, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) {
1.155 deraadt 757: save_errno = errno;
1.50 vincent 758: close(s);
1.155 deraadt 759: errno = save_errno;
1.185 tb 760: return -1;
1.42 ericj 761: }
1.198 bluhm 762: if (vflag)
763: report_sock("Bound", NULL, 0, path);
1.185 tb 764:
765: return s;
1.42 ericj 766: }
767:
1.173 bluhm 768: int
1.175 bluhm 769: timeout_tls(int s, struct tls *tls_ctx, int (*func)(struct tls *))
1.173 bluhm 770: {
771: struct pollfd pfd;
772: int ret;
773:
1.175 bluhm 774: while ((ret = (*func)(tls_ctx)) != 0) {
1.173 bluhm 775: if (ret == TLS_WANT_POLLIN)
776: pfd.events = POLLIN;
777: else if (ret == TLS_WANT_POLLOUT)
778: pfd.events = POLLOUT;
779: else
780: break;
781: pfd.fd = s;
782: if ((ret = poll(&pfd, 1, timeout)) == 1)
783: continue;
784: else if (ret == 0) {
785: errno = ETIMEDOUT;
786: ret = -1;
787: break;
788: } else
789: err(1, "poll failed");
790: }
791:
1.185 tb 792: return ret;
1.173 bluhm 793: }
794:
1.133 beck 795: void
796: tls_setup_client(struct tls *tls_ctx, int s, char *host)
797: {
1.173 bluhm 798: const char *errstr;
1.136 deraadt 799:
1.133 beck 800: if (tls_connect_socket(tls_ctx, s,
801: tls_expectname ? tls_expectname : host) == -1) {
802: errx(1, "tls connection failed (%s)",
803: tls_error(tls_ctx));
804: }
1.175 bluhm 805: if (timeout_tls(s, tls_ctx, tls_handshake) == -1) {
1.173 bluhm 806: if ((errstr = tls_error(tls_ctx)) == NULL)
807: errstr = strerror(errno);
808: errx(1, "tls handshake failed (%s)", errstr);
809: }
1.133 beck 810: if (vflag)
1.183 bluhm 811: report_tls(tls_ctx, host);
1.137 beck 812: if (tls_expecthash && tls_peer_cert_hash(tls_ctx) &&
813: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 814: errx(1, "peer certificate is not %s", tls_expecthash);
1.179 beck 815: if (Zflag) {
816: save_peer_cert(tls_ctx, Zflag);
817: if (Zflag != stderr && (fclose(Zflag) != 0))
818: err(1, "fclose failed saving peer cert");
819: }
1.133 beck 820: }
1.141 deraadt 821:
1.133 beck 822: struct tls *
823: tls_setup_server(struct tls *tls_ctx, int connfd, char *host)
824: {
825: struct tls *tls_cctx;
1.173 bluhm 826: const char *errstr;
1.136 deraadt 827:
1.173 bluhm 828: if (tls_accept_socket(tls_ctx, &tls_cctx, connfd) == -1) {
829: warnx("tls accept failed (%s)", tls_error(tls_ctx));
1.175 bluhm 830: } else if (timeout_tls(connfd, tls_cctx, tls_handshake) == -1) {
1.178 bluhm 831: if ((errstr = tls_error(tls_cctx)) == NULL)
1.173 bluhm 832: errstr = strerror(errno);
833: warnx("tls handshake failed (%s)", errstr);
1.133 beck 834: } else {
835: int gotcert = tls_peer_cert_provided(tls_cctx);
1.136 deraadt 836:
1.133 beck 837: if (vflag && gotcert)
1.183 bluhm 838: report_tls(tls_cctx, host);
1.133 beck 839: if ((TLSopt & TLS_CCERT) && !gotcert)
840: warnx("No client certificate provided");
1.137 beck 841: else if (gotcert && tls_peer_cert_hash(tls_ctx) && tls_expecthash &&
842: strcmp(tls_expecthash, tls_peer_cert_hash(tls_ctx)) != 0)
1.133 beck 843: warnx("peer certificate is not %s", tls_expecthash);
844: else if (gotcert && tls_expectname &&
1.134 deraadt 845: (!tls_peer_cert_contains_name(tls_cctx, tls_expectname)))
1.133 beck 846: warnx("name (%s) not found in client cert",
847: tls_expectname);
848: else {
849: return tls_cctx;
850: }
851: }
852: return NULL;
853: }
1.141 deraadt 854:
1.42 ericj 855: /*
1.99 jeremy 856: * unix_connect()
857: * Returns a socket connected to a local unix socket. Returns -1 on failure.
1.42 ericj 858: */
859: int
1.99 jeremy 860: unix_connect(char *path)
1.42 ericj 861: {
1.144 bcook 862: struct sockaddr_un s_un;
1.155 deraadt 863: int s, save_errno;
1.42 ericj 864:
1.99 jeremy 865: if (uflag) {
1.205 deraadt 866: if ((s = unix_bind(unix_dg_tmp_socket, SOCK_CLOEXEC)) == -1)
1.185 tb 867: return -1;
1.99 jeremy 868: } else {
1.205 deraadt 869: if ((s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0)) == -1)
1.185 tb 870: return -1;
1.99 jeremy 871: }
1.42 ericj 872:
1.144 bcook 873: memset(&s_un, 0, sizeof(struct sockaddr_un));
874: s_un.sun_family = AF_UNIX;
1.60 avsm 875:
1.144 bcook 876: if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >=
877: sizeof(s_un.sun_path)) {
1.60 avsm 878: close(s);
879: errno = ENAMETOOLONG;
1.185 tb 880: return -1;
1.60 avsm 881: }
1.205 deraadt 882: if (connect(s, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) {
1.155 deraadt 883: save_errno = errno;
1.42 ericj 884: close(s);
1.155 deraadt 885: errno = save_errno;
1.185 tb 886: return -1;
1.42 ericj 887: }
1.185 tb 888: return s;
1.99 jeremy 889:
890: }
891:
892: /*
893: * unix_listen()
894: * Create a unix domain socket, and listen on it.
895: */
896: int
897: unix_listen(char *path)
898: {
899: int s;
1.198 bluhm 900:
1.205 deraadt 901: if ((s = unix_bind(path, 0)) == -1)
1.185 tb 902: return -1;
1.205 deraadt 903: if (listen(s, 5) == -1) {
1.42 ericj 904: close(s);
1.185 tb 905: return -1;
1.42 ericj 906: }
1.198 bluhm 907: if (vflag)
908: report_sock("Listening", NULL, 0, path);
909:
1.185 tb 910: return s;
1.42 ericj 911: }
912:
913: /*
1.21 ericj 914: * remote_connect()
1.67 jmc 915: * Returns a socket connected to a remote host. Properly binds to a local
916: * port or source address if needed. Returns -1 on failure.
1.11 ericj 917: */
1.21 ericj 918: int
1.77 otto 919: remote_connect(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 920: {
921: struct addrinfo *res, *res0;
1.163 bcook 922: int s = -1, error, on = 1, save_errno;
1.21 ericj 923:
1.161 halex 924: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.176 jca 925: errx(1, "getaddrinfo for host \"%s\" port %s: %s", host,
926: port, gai_strerror(error));
1.21 ericj 927:
1.161 halex 928: for (res = res0; res; res = res->ai_next) {
929: if ((s = socket(res->ai_family, res->ai_socktype |
1.205 deraadt 930: SOCK_NONBLOCK, res->ai_protocol)) == -1)
1.21 ericj 931: continue;
932:
1.67 jmc 933: /* Bind to a local port or source address if specified. */
1.21 ericj 934: if (sflag || pflag) {
935: struct addrinfo ahints, *ares;
1.6 deraadt 936:
1.91 markus 937: /* try SO_BINDANY, but don't insist */
938: setsockopt(s, SOL_SOCKET, SO_BINDANY, &on, sizeof(on));
1.21 ericj 939: memset(&ahints, 0, sizeof(struct addrinfo));
1.161 halex 940: ahints.ai_family = res->ai_family;
1.21 ericj 941: ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
942: ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
1.25 ericj 943: ahints.ai_flags = AI_PASSIVE;
1.38 jakob 944: if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
1.56 stevesk 945: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.21 ericj 946:
947: if (bind(s, (struct sockaddr *)ares->ai_addr,
1.205 deraadt 948: ares->ai_addrlen) == -1)
1.119 guenther 949: err(1, "bind failed");
1.21 ericj 950: freeaddrinfo(ares);
1.6 deraadt 951: }
1.81 marius 952:
1.161 halex 953: set_common_sockopts(s, res->ai_family);
1.6 deraadt 954:
1.161 halex 955: if (timeout_connect(s, res->ai_addr, res->ai_addrlen) == 0)
1.6 deraadt 956: break;
1.143 deraadt 957: if (vflag)
1.71 mcbride 958: warn("connect to %s port %s (%s) failed", host, port,
959: uflag ? "udp" : "tcp");
1.34 jakob 960:
1.155 deraadt 961: save_errno = errno;
1.21 ericj 962: close(s);
1.155 deraadt 963: errno = save_errno;
1.21 ericj 964: s = -1;
1.161 halex 965: }
1.21 ericj 966:
1.161 halex 967: freeaddrinfo(res0);
1.1 deraadt 968:
1.185 tb 969: return s;
1.103 fgsch 970: }
971:
972: int
973: timeout_connect(int s, const struct sockaddr *name, socklen_t namelen)
974: {
975: struct pollfd pfd;
976: socklen_t optlen;
1.132 bluhm 977: int optval;
1.103 fgsch 978: int ret;
979:
980: if ((ret = connect(s, name, namelen)) != 0 && errno == EINPROGRESS) {
981: pfd.fd = s;
982: pfd.events = POLLOUT;
983: if ((ret = poll(&pfd, 1, timeout)) == 1) {
984: optlen = sizeof(optval);
985: if ((ret = getsockopt(s, SOL_SOCKET, SO_ERROR,
986: &optval, &optlen)) == 0) {
987: errno = optval;
988: ret = optval == 0 ? 0 : -1;
989: }
990: } else if (ret == 0) {
991: errno = ETIMEDOUT;
992: ret = -1;
993: } else
994: err(1, "poll failed");
995: }
996:
1.185 tb 997: return ret;
1.7 deraadt 998: }
1.1 deraadt 999:
1.11 ericj 1000: /*
1.21 ericj 1001: * local_listen()
1.67 jmc 1002: * Returns a socket listening on a local port, binds to specified source
1003: * address. Returns -1 on failure.
1.11 ericj 1004: */
1.21 ericj 1005: int
1.194 bluhm 1006: local_listen(const char *host, const char *port, struct addrinfo hints)
1.21 ericj 1007: {
1008: struct addrinfo *res, *res0;
1.163 bcook 1009: int s = -1, ret, x = 1, save_errno;
1.21 ericj 1010: int error;
1.6 deraadt 1011:
1.67 jmc 1012: /* Allow nodename to be null. */
1.21 ericj 1013: hints.ai_flags |= AI_PASSIVE;
1.7 deraadt 1014:
1.21 ericj 1015: /*
1016: * In the case of binding to a wildcard address
1017: * default to binding to an ipv4 address.
1018: */
1019: if (host == NULL && hints.ai_family == AF_UNSPEC)
1020: hints.ai_family = AF_INET;
1.1 deraadt 1021:
1.161 halex 1022: if ((error = getaddrinfo(host, port, &hints, &res0)))
1.70 deraadt 1023: errx(1, "getaddrinfo: %s", gai_strerror(error));
1.14 ericj 1024:
1.161 halex 1025: for (res = res0; res; res = res->ai_next) {
1026: if ((s = socket(res->ai_family, res->ai_socktype,
1.205 deraadt 1027: res->ai_protocol)) == -1)
1.21 ericj 1028: continue;
1.93 claudio 1029:
1.21 ericj 1030: ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
1031: if (ret == -1)
1.30 smart 1032: err(1, NULL);
1.81 marius 1033:
1.161 halex 1034: set_common_sockopts(s, res->ai_family);
1.1 deraadt 1035:
1.161 halex 1036: if (bind(s, (struct sockaddr *)res->ai_addr,
1037: res->ai_addrlen) == 0)
1.21 ericj 1038: break;
1.1 deraadt 1039:
1.155 deraadt 1040: save_errno = errno;
1.21 ericj 1041: close(s);
1.155 deraadt 1042: errno = save_errno;
1.21 ericj 1043: s = -1;
1.161 halex 1044: }
1.1 deraadt 1045:
1.47 ericj 1046: if (!uflag && s != -1) {
1.205 deraadt 1047: if (listen(s, 1) == -1)
1.57 stevesk 1048: err(1, "listen");
1.12 ericj 1049: }
1.198 bluhm 1050: if (vflag && s != -1) {
1051: struct sockaddr_storage ss;
1052: socklen_t len;
1053:
1054: len = sizeof(ss);
1055: if (getsockname(s, (struct sockaddr *)&ss, &len) == -1)
1056: err(1, "getsockname");
1057: report_sock(uflag ? "Bound" : "Listening",
1058: (struct sockaddr *)&ss, len, NULL);
1059: }
1.1 deraadt 1060:
1.161 halex 1061: freeaddrinfo(res0);
1.1 deraadt 1062:
1.185 tb 1063: return s;
1.7 deraadt 1064: }
1065:
1.11 ericj 1066: /*
1.21 ericj 1067: * readwrite()
1068: * Loop that polls on the network file descriptor and stdin.
1.11 ericj 1069: */
1.21 ericj 1070: void
1.133 beck 1071: readwrite(int net_fd, struct tls *tls_ctx)
1.6 deraadt 1072: {
1.125 tedu 1073: struct pollfd pfd[4];
1074: int stdin_fd = STDIN_FILENO;
1075: int stdout_fd = STDOUT_FILENO;
1076: unsigned char netinbuf[BUFSIZE];
1077: size_t netinbufpos = 0;
1078: unsigned char stdinbuf[BUFSIZE];
1079: size_t stdinbufpos = 0;
1.130 chl 1080: int n, num_fds;
1.125 tedu 1081: ssize_t ret;
1082:
1083: /* don't read from stdin if requested */
1084: if (dflag)
1085: stdin_fd = -1;
1086:
1087: /* stdin */
1088: pfd[POLL_STDIN].fd = stdin_fd;
1089: pfd[POLL_STDIN].events = POLLIN;
1090:
1091: /* network out */
1092: pfd[POLL_NETOUT].fd = net_fd;
1093: pfd[POLL_NETOUT].events = 0;
1094:
1095: /* network in */
1096: pfd[POLL_NETIN].fd = net_fd;
1097: pfd[POLL_NETIN].events = POLLIN;
1098:
1099: /* stdout */
1100: pfd[POLL_STDOUT].fd = stdout_fd;
1101: pfd[POLL_STDOUT].events = 0;
1102:
1103: while (1) {
1104: /* both inputs are gone, buffers are empty, we are done */
1.134 deraadt 1105: if (pfd[POLL_STDIN].fd == -1 && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1106: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1107: return;
1108: /* both outputs are gone, we can't continue */
1.174 bluhm 1109: if (pfd[POLL_NETOUT].fd == -1 && pfd[POLL_STDOUT].fd == -1)
1.125 tedu 1110: return;
1111: /* listen and net in gone, queues empty, done */
1.134 deraadt 1112: if (lflag && pfd[POLL_NETIN].fd == -1 &&
1.174 bluhm 1113: stdinbufpos == 0 && netinbufpos == 0)
1.125 tedu 1114: return;
1.21 ericj 1115:
1.125 tedu 1116: /* help says -i is for "wait between lines sent". We read and
1117: * write arbitrary amounts of data, and we don't want to start
1118: * scanning for newlines, so this is as good as it gets */
1.21 ericj 1119: if (iflag)
1120: sleep(iflag);
1121:
1.125 tedu 1122: /* poll */
1123: num_fds = poll(pfd, 4, timeout);
1124:
1125: /* treat poll errors */
1.174 bluhm 1126: if (num_fds == -1)
1.125 tedu 1127: err(1, "polling error");
1.49 hugh 1128:
1.125 tedu 1129: /* timeout happened */
1130: if (num_fds == 0)
1.49 hugh 1131: return;
1.21 ericj 1132:
1.125 tedu 1133: /* treat socket error conditions */
1134: for (n = 0; n < 4; n++) {
1135: if (pfd[n].revents & (POLLERR|POLLNVAL)) {
1136: pfd[n].fd = -1;
1.6 deraadt 1137: }
1.21 ericj 1138: }
1.125 tedu 1139: /* reading is possible after HUP */
1140: if (pfd[POLL_STDIN].events & POLLIN &&
1141: pfd[POLL_STDIN].revents & POLLHUP &&
1.134 deraadt 1142: !(pfd[POLL_STDIN].revents & POLLIN))
1143: pfd[POLL_STDIN].fd = -1;
1.125 tedu 1144:
1145: if (pfd[POLL_NETIN].events & POLLIN &&
1146: pfd[POLL_NETIN].revents & POLLHUP &&
1.134 deraadt 1147: !(pfd[POLL_NETIN].revents & POLLIN))
1148: pfd[POLL_NETIN].fd = -1;
1.125 tedu 1149:
1150: if (pfd[POLL_NETOUT].revents & POLLHUP) {
1151: if (Nflag)
1152: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1153: pfd[POLL_NETOUT].fd = -1;
1154: }
1155: /* if HUP, stop watching stdout */
1156: if (pfd[POLL_STDOUT].revents & POLLHUP)
1157: pfd[POLL_STDOUT].fd = -1;
1158: /* if no net out, stop watching stdin */
1159: if (pfd[POLL_NETOUT].fd == -1)
1160: pfd[POLL_STDIN].fd = -1;
1161: /* if no stdout, stop watching net in */
1162: if (pfd[POLL_STDOUT].fd == -1) {
1163: if (pfd[POLL_NETIN].fd != -1)
1164: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1165: pfd[POLL_NETIN].fd = -1;
1166: }
1.21 ericj 1167:
1.125 tedu 1168: /* try to read from stdin */
1169: if (pfd[POLL_STDIN].revents & POLLIN && stdinbufpos < BUFSIZE) {
1170: ret = fillbuf(pfd[POLL_STDIN].fd, stdinbuf,
1.133 beck 1171: &stdinbufpos, NULL);
1172: if (ret == TLS_WANT_POLLIN)
1173: pfd[POLL_STDIN].events = POLLIN;
1174: else if (ret == TLS_WANT_POLLOUT)
1175: pfd[POLL_STDIN].events = POLLOUT;
1176: else if (ret == 0 || ret == -1)
1.125 tedu 1177: pfd[POLL_STDIN].fd = -1;
1178: /* read something - poll net out */
1179: if (stdinbufpos > 0)
1180: pfd[POLL_NETOUT].events = POLLOUT;
1181: /* filled buffer - remove self from polling */
1182: if (stdinbufpos == BUFSIZE)
1183: pfd[POLL_STDIN].events = 0;
1184: }
1185: /* try to write to network */
1186: if (pfd[POLL_NETOUT].revents & POLLOUT && stdinbufpos > 0) {
1187: ret = drainbuf(pfd[POLL_NETOUT].fd, stdinbuf,
1.133 beck 1188: &stdinbufpos, tls_ctx);
1189: if (ret == TLS_WANT_POLLIN)
1190: pfd[POLL_NETOUT].events = POLLIN;
1191: else if (ret == TLS_WANT_POLLOUT)
1192: pfd[POLL_NETOUT].events = POLLOUT;
1193: else if (ret == -1)
1.125 tedu 1194: pfd[POLL_NETOUT].fd = -1;
1195: /* buffer empty - remove self from polling */
1196: if (stdinbufpos == 0)
1197: pfd[POLL_NETOUT].events = 0;
1198: /* buffer no longer full - poll stdin again */
1199: if (stdinbufpos < BUFSIZE)
1200: pfd[POLL_STDIN].events = POLLIN;
1201: }
1202: /* try to read from network */
1203: if (pfd[POLL_NETIN].revents & POLLIN && netinbufpos < BUFSIZE) {
1204: ret = fillbuf(pfd[POLL_NETIN].fd, netinbuf,
1.133 beck 1205: &netinbufpos, tls_ctx);
1206: if (ret == TLS_WANT_POLLIN)
1207: pfd[POLL_NETIN].events = POLLIN;
1208: else if (ret == TLS_WANT_POLLOUT)
1209: pfd[POLL_NETIN].events = POLLOUT;
1210: else if (ret == -1)
1.125 tedu 1211: pfd[POLL_NETIN].fd = -1;
1212: /* eof on net in - remove from pfd */
1213: if (ret == 0) {
1214: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1215: pfd[POLL_NETIN].fd = -1;
1.50 vincent 1216: }
1.182 bluhm 1217: if (recvlimit > 0 && ++recvcount >= recvlimit) {
1218: if (pfd[POLL_NETIN].fd != -1)
1219: shutdown(pfd[POLL_NETIN].fd, SHUT_RD);
1220: pfd[POLL_NETIN].fd = -1;
1221: pfd[POLL_STDIN].fd = -1;
1222: }
1.125 tedu 1223: /* read something - poll stdout */
1224: if (netinbufpos > 0)
1225: pfd[POLL_STDOUT].events = POLLOUT;
1226: /* filled buffer - remove self from polling */
1227: if (netinbufpos == BUFSIZE)
1228: pfd[POLL_NETIN].events = 0;
1229: /* handle telnet */
1230: if (tflag)
1231: atelnet(pfd[POLL_NETIN].fd, netinbuf,
1232: netinbufpos);
1233: }
1234: /* try to write to stdout */
1235: if (pfd[POLL_STDOUT].revents & POLLOUT && netinbufpos > 0) {
1236: ret = drainbuf(pfd[POLL_STDOUT].fd, netinbuf,
1.133 beck 1237: &netinbufpos, NULL);
1238: if (ret == TLS_WANT_POLLIN)
1239: pfd[POLL_STDOUT].events = POLLIN;
1240: else if (ret == TLS_WANT_POLLOUT)
1241: pfd[POLL_STDOUT].events = POLLOUT;
1242: else if (ret == -1)
1.125 tedu 1243: pfd[POLL_STDOUT].fd = -1;
1244: /* buffer empty - remove self from polling */
1245: if (netinbufpos == 0)
1246: pfd[POLL_STDOUT].events = 0;
1247: /* buffer no longer full - poll net in again */
1248: if (netinbufpos < BUFSIZE)
1249: pfd[POLL_NETIN].events = POLLIN;
1250: }
1251:
1252: /* stdin gone and queue empty? */
1253: if (pfd[POLL_STDIN].fd == -1 && stdinbufpos == 0) {
1254: if (pfd[POLL_NETOUT].fd != -1 && Nflag)
1255: shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
1256: pfd[POLL_NETOUT].fd = -1;
1257: }
1258: /* net in gone and queue empty? */
1259: if (pfd[POLL_NETIN].fd == -1 && netinbufpos == 0) {
1260: pfd[POLL_STDOUT].fd = -1;
1.21 ericj 1261: }
1.11 ericj 1262: }
1.125 tedu 1263: }
1264:
1265: ssize_t
1.133 beck 1266: drainbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1267: {
1268: ssize_t n;
1269: ssize_t adjust;
1270:
1.203 jsing 1271: if (tls) {
1.133 beck 1272: n = tls_write(tls, buf, *bufpos);
1.203 jsing 1273: if (n == -1)
1274: errx(1, "tls write failed (%s)", tls_error(tls));
1275: } else {
1.133 beck 1276: n = write(fd, buf, *bufpos);
1277: /* don't treat EAGAIN, EINTR as error */
1278: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1279: n = TLS_WANT_POLLOUT;
1280: }
1.125 tedu 1281: if (n <= 0)
1282: return n;
1283: /* adjust buffer */
1284: adjust = *bufpos - n;
1285: if (adjust > 0)
1286: memmove(buf, buf + n, adjust);
1287: *bufpos -= n;
1288: return n;
1289: }
1290:
1291: ssize_t
1.133 beck 1292: fillbuf(int fd, unsigned char *buf, size_t *bufpos, struct tls *tls)
1.125 tedu 1293: {
1294: size_t num = BUFSIZE - *bufpos;
1295: ssize_t n;
1296:
1.203 jsing 1297: if (tls) {
1.133 beck 1298: n = tls_read(tls, buf + *bufpos, num);
1.203 jsing 1299: if (n == -1)
1300: errx(1, "tls read failed (%s)", tls_error(tls));
1301: } else {
1.133 beck 1302: n = read(fd, buf + *bufpos, num);
1303: /* don't treat EAGAIN, EINTR as error */
1304: if (n == -1 && (errno == EAGAIN || errno == EINTR))
1305: n = TLS_WANT_POLLIN;
1306: }
1.125 tedu 1307: if (n <= 0)
1308: return n;
1309: *bufpos += n;
1310: return n;
1.113 djm 1311: }
1312:
1313: /*
1314: * fdpass()
1315: * Pass the connected file descriptor to stdout and exit.
1316: */
1317: void
1318: fdpass(int nfd)
1319: {
1320: struct msghdr mh;
1321: union {
1322: struct cmsghdr hdr;
1323: char buf[CMSG_SPACE(sizeof(int))];
1324: } cmsgbuf;
1325: struct cmsghdr *cmsg;
1326: struct iovec iov;
1327: char c = '\0';
1328: ssize_t r;
1329: struct pollfd pfd;
1330:
1331: /* Avoid obvious stupidity */
1332: if (isatty(STDOUT_FILENO))
1333: errx(1, "Cannot pass file descriptor to tty");
1334:
1.202 mestre 1335: memset(&mh, 0, sizeof(mh));
1336: memset(&cmsgbuf, 0, sizeof(cmsgbuf));
1337: memset(&iov, 0, sizeof(iov));
1.113 djm 1338:
1339: mh.msg_control = (caddr_t)&cmsgbuf.buf;
1340: mh.msg_controllen = sizeof(cmsgbuf.buf);
1341: cmsg = CMSG_FIRSTHDR(&mh);
1342: cmsg->cmsg_len = CMSG_LEN(sizeof(int));
1343: cmsg->cmsg_level = SOL_SOCKET;
1344: cmsg->cmsg_type = SCM_RIGHTS;
1345: *(int *)CMSG_DATA(cmsg) = nfd;
1346:
1347: iov.iov_base = &c;
1348: iov.iov_len = 1;
1349: mh.msg_iov = &iov;
1350: mh.msg_iovlen = 1;
1351:
1.202 mestre 1352: memset(&pfd, 0, sizeof(pfd));
1.113 djm 1353: pfd.fd = STDOUT_FILENO;
1.128 tobias 1354: pfd.events = POLLOUT;
1.113 djm 1355: for (;;) {
1356: r = sendmsg(STDOUT_FILENO, &mh, 0);
1357: if (r == -1) {
1358: if (errno == EAGAIN || errno == EINTR) {
1359: if (poll(&pfd, 1, -1) == -1)
1360: err(1, "poll");
1361: continue;
1362: }
1363: err(1, "sendmsg");
1.128 tobias 1364: } else if (r != 1)
1.113 djm 1365: errx(1, "sendmsg: unexpected return value %zd", r);
1366: else
1367: break;
1368: }
1369: exit(0);
1.7 deraadt 1370: }
1.50 vincent 1371:
1.67 jmc 1372: /* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */
1.21 ericj 1373: void
1.37 jakob 1374: atelnet(int nfd, unsigned char *buf, unsigned int size)
1.6 deraadt 1375: {
1.24 ericj 1376: unsigned char *p, *end;
1377: unsigned char obuf[4];
1378:
1.95 nicm 1379: if (size < 3)
1380: return;
1381: end = buf + size - 2;
1.24 ericj 1382:
1383: for (p = buf; p < end; p++) {
1.21 ericj 1384: if (*p != IAC)
1.95 nicm 1385: continue;
1.24 ericj 1386:
1.25 ericj 1387: obuf[0] = IAC;
1.24 ericj 1388: p++;
1.50 vincent 1389: if ((*p == WILL) || (*p == WONT))
1.24 ericj 1390: obuf[1] = DONT;
1.95 nicm 1391: else if ((*p == DO) || (*p == DONT))
1.24 ericj 1392: obuf[1] = WONT;
1.95 nicm 1393: else
1394: continue;
1395:
1396: p++;
1397: obuf[2] = *p;
1398: if (atomicio(vwrite, nfd, obuf, 3) != 3)
1399: warn("Write Error!");
1.11 ericj 1400: }
1.7 deraadt 1401: }
1402:
1.153 beck 1403:
1404: int
1405: strtoport(char *portstr, int udp)
1406: {
1407: struct servent *entry;
1408: const char *errstr;
1409: char *proto;
1410: int port = -1;
1411:
1412: proto = udp ? "udp" : "tcp";
1413:
1414: port = strtonum(portstr, 1, PORT_MAX, &errstr);
1415: if (errstr == NULL)
1416: return port;
1417: if (errno != EINVAL)
1418: errx(1, "port number %s: %s", errstr, portstr);
1419: if ((entry = getservbyname(portstr, proto)) == NULL)
1420: errx(1, "service \"%s\" unknown", portstr);
1421: return ntohs(entry->s_port);
1422: }
1423:
1.11 ericj 1424: /*
1.21 ericj 1425: * build_ports()
1.105 lum 1426: * Build an array of ports in portlist[], listing each port
1.67 jmc 1427: * that we should try to connect to.
1.11 ericj 1428: */
1.21 ericj 1429: void
1.37 jakob 1430: build_ports(char *p)
1.6 deraadt 1431: {
1.88 ray 1432: char *n;
1.21 ericj 1433: int hi, lo, cp;
1434: int x = 0;
1435:
1.200 tedu 1436: if (isdigit((unsigned char)*p) && (n = strchr(p, '-')) != NULL) {
1.21 ericj 1437: *n = '\0';
1438: n++;
1439:
1.67 jmc 1440: /* Make sure the ports are in order: lowest->highest. */
1.153 beck 1441: hi = strtoport(n, uflag);
1442: lo = strtoport(p, uflag);
1.21 ericj 1443: if (lo > hi) {
1444: cp = hi;
1445: hi = lo;
1446: lo = cp;
1447: }
1448:
1.145 tb 1449: /*
1450: * Initialize portlist with a random permutation. Based on
1451: * Knuth, as in ip_randomid() in sys/netinet/ip_id.c.
1452: */
1.21 ericj 1453: if (rflag) {
1.145 tb 1454: for (x = 0; x <= hi - lo; x++) {
1455: cp = arc4random_uniform(x + 1);
1456: portlist[x] = portlist[cp];
1.204 deraadt 1457: if (asprintf(&portlist[cp], "%d", x + lo) == -1)
1.145 tb 1458: err(1, "asprintf");
1459: }
1460: } else { /* Load ports sequentially. */
1461: for (cp = lo; cp <= hi; cp++) {
1.204 deraadt 1462: if (asprintf(&portlist[x], "%d", cp) == -1)
1.145 tb 1463: err(1, "asprintf");
1464: x++;
1.6 deraadt 1465: }
1.11 ericj 1466: }
1.21 ericj 1467: } else {
1.153 beck 1468: char *tmp;
1469:
1470: hi = strtoport(p, uflag);
1471: if (asprintf(&tmp, "%d", hi) != -1)
1472: portlist[0] = tmp;
1473: else
1.55 fgsch 1474: err(1, NULL);
1.11 ericj 1475: }
1.13 ericj 1476: }
1477:
1478: /*
1.21 ericj 1479: * udptest()
1480: * Do a few writes to see if the UDP port is there.
1.105 lum 1481: * Fails once PF state table is full.
1.13 ericj 1482: */
1.21 ericj 1483: int
1.37 jakob 1484: udptest(int s)
1.13 ericj 1485: {
1.74 deraadt 1486: int i, ret;
1.13 ericj 1487:
1.52 vincent 1488: for (i = 0; i <= 3; i++) {
1.74 deraadt 1489: if (write(s, "X", 1) == 1)
1.21 ericj 1490: ret = 1;
1.14 ericj 1491: else
1.21 ericj 1492: ret = -1;
1.14 ericj 1493: }
1.185 tb 1494: return ret;
1.81 marius 1495: }
1496:
1.84 dtucker 1497: void
1.127 jca 1498: set_common_sockopts(int s, int af)
1.81 marius 1499: {
1500: int x = 1;
1501:
1502: if (Sflag) {
1503: if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
1504: &x, sizeof(x)) == -1)
1505: err(1, NULL);
1506: }
1507: if (Dflag) {
1508: if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
1509: &x, sizeof(x)) == -1)
1510: err(1, NULL);
1511: }
1.83 dtucker 1512: if (Tflag != -1) {
1.157 bcook 1513: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1514: IP_TOS, &Tflag, sizeof(Tflag)) == -1)
1515: err(1, "set IP ToS");
1.127 jca 1516:
1.157 bcook 1517: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1518: IPV6_TCLASS, &Tflag, sizeof(Tflag)) == -1)
1519: err(1, "set IPv6 traffic class");
1.83 dtucker 1520: }
1.90 djm 1521: if (Iflag) {
1522: if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
1523: &Iflag, sizeof(Iflag)) == -1)
1524: err(1, "set TCP receive buffer size");
1525: }
1526: if (Oflag) {
1527: if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
1528: &Oflag, sizeof(Oflag)) == -1)
1529: err(1, "set TCP send buffer size");
1530: }
1.157 bcook 1531:
1532: if (ttl != -1) {
1533: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1534: IP_TTL, &ttl, sizeof(ttl)))
1535: err(1, "set IP TTL");
1536:
1537: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1538: IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)))
1539: err(1, "set IPv6 unicast hops");
1540: }
1541:
1542: if (minttl != -1) {
1543: if (af == AF_INET && setsockopt(s, IPPROTO_IP,
1544: IP_MINTTL, &minttl, sizeof(minttl)))
1545: err(1, "set IP min TTL");
1546:
1547: else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
1548: IPV6_MINHOPCOUNT, &minttl, sizeof(minttl)))
1549: err(1, "set IPv6 min hop count");
1.156 jca 1550: }
1.83 dtucker 1551: }
1552:
1553: int
1.189 jsing 1554: process_tos_opt(char *s, int *val)
1.83 dtucker 1555: {
1.102 haesbaer 1556: /* DiffServ Codepoints and other TOS mappings */
1557: const struct toskeywords {
1558: const char *keyword;
1559: int val;
1560: } *t, toskeywords[] = {
1561: { "af11", IPTOS_DSCP_AF11 },
1562: { "af12", IPTOS_DSCP_AF12 },
1563: { "af13", IPTOS_DSCP_AF13 },
1564: { "af21", IPTOS_DSCP_AF21 },
1565: { "af22", IPTOS_DSCP_AF22 },
1566: { "af23", IPTOS_DSCP_AF23 },
1567: { "af31", IPTOS_DSCP_AF31 },
1568: { "af32", IPTOS_DSCP_AF32 },
1569: { "af33", IPTOS_DSCP_AF33 },
1570: { "af41", IPTOS_DSCP_AF41 },
1571: { "af42", IPTOS_DSCP_AF42 },
1572: { "af43", IPTOS_DSCP_AF43 },
1573: { "critical", IPTOS_PREC_CRITIC_ECP },
1574: { "cs0", IPTOS_DSCP_CS0 },
1575: { "cs1", IPTOS_DSCP_CS1 },
1576: { "cs2", IPTOS_DSCP_CS2 },
1577: { "cs3", IPTOS_DSCP_CS3 },
1578: { "cs4", IPTOS_DSCP_CS4 },
1579: { "cs5", IPTOS_DSCP_CS5 },
1580: { "cs6", IPTOS_DSCP_CS6 },
1581: { "cs7", IPTOS_DSCP_CS7 },
1582: { "ef", IPTOS_DSCP_EF },
1583: { "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
1584: { "lowdelay", IPTOS_LOWDELAY },
1585: { "netcontrol", IPTOS_PREC_NETCONTROL },
1586: { "reliability", IPTOS_RELIABILITY },
1587: { "throughput", IPTOS_THROUGHPUT },
1.134 deraadt 1588: { NULL, -1 },
1.102 haesbaer 1589: };
1590:
1591: for (t = toskeywords; t->keyword != NULL; t++) {
1592: if (strcmp(s, t->keyword) == 0) {
1593: *val = t->val;
1.185 tb 1594: return 1;
1.102 haesbaer 1595: }
1596: }
1.83 dtucker 1597:
1.185 tb 1598: return 0;
1.108 haesbaer 1599: }
1600:
1.133 beck 1601: int
1.189 jsing 1602: process_tls_opt(char *s, int *flags)
1.133 beck 1603: {
1.189 jsing 1604: size_t len;
1605: char *v;
1606:
1.133 beck 1607: const struct tlskeywords {
1608: const char *keyword;
1.189 jsing 1609: int flag;
1610: char **value;
1.133 beck 1611: } *t, tlskeywords[] = {
1.189 jsing 1612: { "ciphers", -1, &tls_ciphers },
1613: { "clientcert", TLS_CCERT, NULL },
1614: { "muststaple", TLS_MUSTSTAPLE, NULL },
1615: { "noverify", TLS_NOVERIFY, NULL },
1616: { "noname", TLS_NONAME, NULL },
1617: { "protocols", -1, &tls_protocols },
1618: { NULL, -1, NULL },
1.133 beck 1619: };
1620:
1.189 jsing 1621: len = strlen(s);
1622: if ((v = strchr(s, '=')) != NULL) {
1623: len = v - s;
1624: v++;
1625: }
1626:
1.133 beck 1627: for (t = tlskeywords; t->keyword != NULL; t++) {
1.189 jsing 1628: if (strlen(t->keyword) == len &&
1629: strncmp(s, t->keyword, len) == 0) {
1630: if (t->value != NULL) {
1631: if (v == NULL)
1632: errx(1, "invalid tls value `%s'", s);
1633: *t->value = v;
1634: } else {
1635: *flags |= t->flag;
1636: }
1.185 tb 1637: return 1;
1.133 beck 1638: }
1639: }
1.185 tb 1640: return 0;
1.179 beck 1641: }
1642:
1643: void
1644: save_peer_cert(struct tls *tls_ctx, FILE *fp)
1645: {
1646: const char *pem;
1647: size_t plen;
1648:
1649: if ((pem = tls_peer_cert_chain_pem(tls_ctx, &plen)) == NULL)
1650: errx(1, "Can't get peer certificate");
1.183 bluhm 1651: if (fprintf(fp, "%.*s", (int)plen, pem) < 0)
1.179 beck 1652: err(1, "unable to save peer cert");
1653: if (fflush(fp) != 0)
1654: err(1, "unable to flush peer cert");
1.133 beck 1655: }
1656:
1657: void
1.183 bluhm 1658: report_tls(struct tls * tls_ctx, char * host)
1.133 beck 1659: {
1.147 beck 1660: time_t t;
1.164 beck 1661: const char *ocsp_url;
1662:
1.138 beck 1663: fprintf(stderr, "TLS handshake negotiated %s/%s with host %s\n",
1664: tls_conn_version(tls_ctx), tls_conn_cipher(tls_ctx), host);
1.148 mmcc 1665: fprintf(stderr, "Peer name: %s\n",
1.133 beck 1666: tls_expectname ? tls_expectname : host);
1.137 beck 1667: if (tls_peer_cert_subject(tls_ctx))
1668: fprintf(stderr, "Subject: %s\n",
1669: tls_peer_cert_subject(tls_ctx));
1670: if (tls_peer_cert_issuer(tls_ctx))
1671: fprintf(stderr, "Issuer: %s\n",
1672: tls_peer_cert_issuer(tls_ctx));
1.147 beck 1673: if ((t = tls_peer_cert_notbefore(tls_ctx)) != -1)
1674: fprintf(stderr, "Valid From: %s", ctime(&t));
1675: if ((t = tls_peer_cert_notafter(tls_ctx)) != -1)
1676: fprintf(stderr, "Valid Until: %s", ctime(&t));
1.137 beck 1677: if (tls_peer_cert_hash(tls_ctx))
1678: fprintf(stderr, "Cert Hash: %s\n",
1679: tls_peer_cert_hash(tls_ctx));
1.164 beck 1680: ocsp_url = tls_peer_ocsp_url(tls_ctx);
1.166 beck 1681: if (ocsp_url != NULL)
1682: fprintf(stderr, "OCSP URL: %s\n", ocsp_url);
1.164 beck 1683: switch (tls_peer_ocsp_response_status(tls_ctx)) {
1684: case TLS_OCSP_RESPONSE_SUCCESSFUL:
1.165 beck 1685: fprintf(stderr, "OCSP Stapling: %s\n",
1.164 beck 1686: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1687: tls_peer_ocsp_result(tls_ctx));
1688: fprintf(stderr,
1689: " response_status=%d cert_status=%d crl_reason=%d\n",
1690: tls_peer_ocsp_response_status(tls_ctx),
1691: tls_peer_ocsp_cert_status(tls_ctx),
1692: tls_peer_ocsp_crl_reason(tls_ctx));
1693: t = tls_peer_ocsp_this_update(tls_ctx);
1694: fprintf(stderr, " this update: %s",
1695: t != -1 ? ctime(&t) : "\n");
1696: t = tls_peer_ocsp_next_update(tls_ctx);
1697: fprintf(stderr, " next update: %s",
1698: t != -1 ? ctime(&t) : "\n");
1699: t = tls_peer_ocsp_revocation_time(tls_ctx);
1700: fprintf(stderr, " revocation: %s",
1701: t != -1 ? ctime(&t) : "\n");
1702: break;
1703: case -1:
1704: break;
1705: default:
1.165 beck 1706: fprintf(stderr, "OCSP Stapling: failure - response_status %d (%s)\n",
1.164 beck 1707: tls_peer_ocsp_response_status(tls_ctx),
1708: tls_peer_ocsp_result(tls_ctx) == NULL ? "" :
1709: tls_peer_ocsp_result(tls_ctx));
1710: break;
1711:
1712: }
1.133 beck 1713: }
1.147 beck 1714:
1.108 haesbaer 1715: void
1.198 bluhm 1716: report_sock(const char *msg, const struct sockaddr *sa, socklen_t salen,
1717: char *path)
1.108 haesbaer 1718: {
1.198 bluhm 1719: char host[NI_MAXHOST], port[NI_MAXSERV];
1.108 haesbaer 1720: int herr;
1721: int flags = NI_NUMERICSERV;
1.151 beck 1722:
1723: if (path != NULL) {
1.198 bluhm 1724: fprintf(stderr, "%s on %s\n", msg, path);
1.151 beck 1725: return;
1726: }
1.134 deraadt 1727:
1.108 haesbaer 1728: if (nflag)
1729: flags |= NI_NUMERICHOST;
1.134 deraadt 1730:
1.198 bluhm 1731: if ((herr = getnameinfo(sa, salen, host, sizeof(host),
1732: port, sizeof(port), flags)) != 0) {
1.108 haesbaer 1733: if (herr == EAI_SYSTEM)
1734: err(1, "getnameinfo");
1735: else
1736: errx(1, "getnameinfo: %s", gai_strerror(herr));
1737: }
1.134 deraadt 1738:
1.198 bluhm 1739: fprintf(stderr, "%s on %s %s\n", msg, host, port);
1.7 deraadt 1740: }
1.1 deraadt 1741:
1.11 ericj 1742: void
1.58 deraadt 1743: help(void)
1.1 deraadt 1744: {
1.21 ericj 1745: usage(0);
1746: fprintf(stderr, "\tCommand Summary:\n\
1747: \t-4 Use IPv4\n\
1748: \t-6 Use IPv6\n\
1.135 jmc 1749: \t-C certfile Public key file\n\
1750: \t-c Use TLS\n\
1.73 markus 1751: \t-D Enable the debug socket option\n\
1.69 tedu 1752: \t-d Detach from stdin\n\
1.135 jmc 1753: \t-e name\t Required name in peer certificate\n\
1.114 jmc 1754: \t-F Pass socket fd\n\
1.135 jmc 1755: \t-H hash\t Hash string of peer certificate\n\
1.21 ericj 1756: \t-h This help text\n\
1.90 djm 1757: \t-I length TCP receive buffer length\n\
1.135 jmc 1758: \t-i interval Delay interval for lines sent, ports scanned\n\
1759: \t-K keyfile Private key file\n\
1.21 ericj 1760: \t-k Keep inbound sockets open for multiple connects\n\
1761: \t-l Listen mode, for inbound connects\n\
1.156 jca 1762: \t-M ttl Outgoing TTL / Hop Limit\n\
1763: \t-m minttl Minimum incoming TTL / Hop Limit\n\
1.111 sthen 1764: \t-N Shutdown the network socket after EOF on stdin\n\
1.22 jasoni 1765: \t-n Suppress name/port resolutions\n\
1.90 djm 1766: \t-O length TCP send buffer length\n\
1.169 jmc 1767: \t-o staplefile Staple file\n\
1.86 djm 1768: \t-P proxyuser\tUsername for proxy authentication\n\
1.36 jakob 1769: \t-p port\t Specify local port for remote connects\n\
1.135 jmc 1770: \t-R CAfile CA bundle\n\
1.21 ericj 1771: \t-r Randomize remote ports\n\
1.67 jmc 1772: \t-S Enable the TCP MD5 signature option\n\
1.135 jmc 1773: \t-s source Local source address\n\
1774: \t-T keyword TOS value or TLS options\n\
1.21 ericj 1775: \t-t Answer TELNET negotiation\n\
1.67 jmc 1776: \t-U Use UNIX domain socket\n\
1.21 ericj 1777: \t-u UDP mode\n\
1.98 guenther 1778: \t-V rtable Specify alternate routing table\n\
1.21 ericj 1779: \t-v Verbose\n\
1.182 bluhm 1780: \t-W recvlimit Terminate after receiving a number of packets\n\
1.135 jmc 1781: \t-w timeout Timeout for connects and final net reads\n\
1.75 djm 1782: \t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
1783: \t-x addr[:port]\tSpecify proxy address and port\n\
1.180 jmc 1784: \t-Z Peer certificate file\n\
1.21 ericj 1785: \t-z Zero-I/O mode [used for scanning]\n\
1786: Port numbers can be individual or ranges: lo-hi [inclusive]\n");
1787: exit(1);
1.11 ericj 1788: }
1789:
1790: void
1.37 jakob 1791: usage(int ret)
1.11 ericj 1792: {
1.92 sobrado 1793: fprintf(stderr,
1.135 jmc 1794: "usage: nc [-46cDdFhklNnrStUuvz] [-C certfile] [-e name] "
1795: "[-H hash] [-I length]\n"
1.156 jca 1796: "\t [-i interval] [-K keyfile] [-M ttl] [-m minttl] [-O length]\n"
1.169 jmc 1797: "\t [-o staplefile] [-P proxy_username] [-p source_port] "
1798: "[-R CAfile]\n"
1.182 bluhm 1799: "\t [-s source] [-T keyword] [-V rtable] [-W recvlimit] "
1800: "[-w timeout]\n"
1801: "\t [-X proxy_protocol] [-x proxy_address[:port]] "
1802: "[-Z peercertfile]\n"
1803: "\t [destination] [port]\n");
1.21 ericj 1804: if (ret)
1805: exit(1);
1.7 deraadt 1806: }
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