1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/mtio.h> 40 #include <sys/ioctl.h> 41 #include <sys/socket.h> 42 #include <sys/time.h> 43 #ifdef sunos 44 #include <sys/vnode.h> 45 46 #include <ufs/inode.h> 47 #else 48 #include <ufs/ufs/dinode.h> 49 #endif 50 51 #include <netinet/in.h> 52 #include <netinet/in_systm.h> 53 #include <netinet/ip.h> 54 55 #include <protocols/dumprestore.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <netdb.h> 60 #include <pwd.h> 61 #include <signal.h> 62 #include <stdio.h> 63 #ifdef __STDC__ 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #endif 68 69 #include "pathnames.h" 70 #include "dump.h" 71 72 #define TS_CLOSED 0 73 #define TS_OPEN 1 74 75 static int rmtstate = TS_CLOSED; 76 static int rmtape; 77 static char *rmtpeer; 78 79 static int okname __P((char *)); 80 static int rmtcall __P((char *, char *)); 81 static void rmtconnaborted __P((/* int, int */)); 82 static int rmtgetb __P((void)); 83 static void rmtgetconn __P((void)); 84 static void rmtgets __P((char *, int)); 85 static int rmtreply __P((char *)); 86 #ifdef KERBEROS 87 int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *)); 88 #endif 89 90 static int errfd = -1; 91 extern int dokerberos; 92 extern int ntrec; /* blocking factor on tape */ 93 94 int 95 rmthost(host) 96 char *host; 97 { 98 99 rmtpeer = malloc(strlen(host) + 1); 100 if (rmtpeer) 101 strcpy(rmtpeer, host); 102 else 103 rmtpeer = host; 104 signal(SIGPIPE, rmtconnaborted); 105 rmtgetconn(); 106 if (rmtape < 0) 107 return (0); 108 return (1); 109 } 110 111 static void 112 rmtconnaborted() 113 { 114 msg("Lost connection to remote host.\n"); 115 if (errfd != -1) { 116 fd_set r; 117 struct timeval t; 118 119 FD_ZERO(&r); 120 FD_SET(errfd, &r); 121 t.tv_sec = 0; 122 t.tv_usec = 0; 123 if (select(errfd + 1, &r, NULL, NULL, &t)) { 124 int i; 125 char buf[2048]; 126 127 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { 128 buf[i] = '\0'; 129 msg("on %s: %s%s", rmtpeer, buf, 130 buf[i - 1] == '\n' ? "" : "\n"); 131 } 132 } 133 } 134 135 exit(X_ABORT); 136 } 137 138 void 139 rmtgetconn() 140 { 141 register char *cp; 142 register const char *rmt; 143 static struct servent *sp = NULL; 144 static struct passwd *pwd = NULL; 145 #ifdef notdef 146 static int on = 1; 147 #endif 148 char *tuser; 149 int size; 150 int throughput; 151 152 if (sp == NULL) { 153 sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp"); 154 if (sp == NULL) { 155 msg("%s/tcp: unknown service\n", 156 dokerberos ? "kshell" : "shell"); 157 exit(X_ABORT); 158 } 159 pwd = getpwuid(getuid()); 160 if (pwd == NULL) { 161 msg("who are you?\n"); 162 exit(X_ABORT); 163 } 164 } 165 if ((cp = strchr(rmtpeer, '@')) != NULL) { 166 tuser = rmtpeer; 167 *cp = '\0'; 168 if (!okname(tuser)) 169 exit(X_ABORT); 170 rmtpeer = ++cp; 171 } else 172 tuser = pwd->pw_name; 173 if ((rmt = getenv("RMT")) == NULL) 174 rmt = _PATH_RMT; 175 msg(""); 176 #ifdef KERBEROS 177 if (dokerberos) 178 rmtape = krcmd(&rmtpeer, sp->s_port, tuser, rmt, &errfd, 179 (char *)0); 180 else 181 #endif 182 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, 183 tuser, rmt, &errfd); 184 if (rmtape < 0) { 185 msg("login to %s as %s failed.\n", rmtpeer, tuser); 186 return; 187 } 188 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer); 189 size = ntrec * TP_BSIZE; 190 if (size > 60 * 1024) /* XXX */ 191 size = 60 * 1024; 192 /* Leave some space for rmt request/response protocol */ 193 size += 2 * 1024; 194 while (size > TP_BSIZE && 195 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 196 size -= TP_BSIZE; 197 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 198 throughput = IPTOS_THROUGHPUT; 199 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS, 200 &throughput, sizeof(throughput)) < 0) 201 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); 202 203 #ifdef notdef 204 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 205 perror("TCP_NODELAY setsockopt"); 206 #endif 207 } 208 209 static int 210 okname(cp0) 211 char *cp0; 212 { 213 register char *cp; 214 register int c; 215 216 for (cp = cp0; *cp; cp++) { 217 c = *cp; 218 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 219 msg("invalid user name %s\n", cp0); 220 return (0); 221 } 222 } 223 return (1); 224 } 225 226 int 227 rmtopen(tape, mode) 228 char *tape; 229 int mode; 230 { 231 char buf[256]; 232 233 (void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode); 234 rmtstate = TS_OPEN; 235 return (rmtcall(tape, buf)); 236 } 237 238 void 239 rmtclose() 240 { 241 242 if (rmtstate != TS_OPEN) 243 return; 244 rmtcall("close", "C\n"); 245 rmtstate = TS_CLOSED; 246 } 247 248 int 249 rmtread(buf, count) 250 char *buf; 251 int count; 252 { 253 char line[30]; 254 int n, i, cc; 255 extern errno; 256 257 (void)snprintf(line, sizeof (line), "R%d\n", count); 258 n = rmtcall("read", line); 259 if (n < 0) { 260 errno = n; 261 return (-1); 262 } 263 for (i = 0; i < n; i += cc) { 264 cc = read(rmtape, buf+i, n - i); 265 if (cc <= 0) { 266 rmtconnaborted(); 267 } 268 } 269 return (n); 270 } 271 272 int 273 rmtwrite(buf, count) 274 char *buf; 275 int count; 276 { 277 char line[30]; 278 279 (void)snprintf(line, sizeof (line), "W%d\n", count); 280 write(rmtape, line, strlen(line)); 281 write(rmtape, buf, count); 282 return (rmtreply("write")); 283 } 284 285 void 286 rmtwrite0(count) 287 int count; 288 { 289 char line[30]; 290 291 (void)snprintf(line, sizeof (line), "W%d\n", count); 292 write(rmtape, line, strlen(line)); 293 } 294 295 void 296 rmtwrite1(buf, count) 297 char *buf; 298 int count; 299 { 300 301 write(rmtape, buf, count); 302 } 303 304 int 305 rmtwrite2() 306 { 307 308 return (rmtreply("write")); 309 } 310 311 int 312 rmtseek(offset, pos) 313 int offset, pos; 314 { 315 char line[80]; 316 317 (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); 318 return (rmtcall("seek", line)); 319 } 320 321 struct mtget mts; 322 323 struct mtget * 324 rmtstatus() 325 { 326 register int i; 327 register char *cp; 328 329 if (rmtstate != TS_OPEN) 330 return (NULL); 331 rmtcall("status", "S\n"); 332 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 333 *cp++ = rmtgetb(); 334 return (&mts); 335 } 336 337 int 338 rmtioctl(cmd, count) 339 int cmd, count; 340 { 341 char buf[256]; 342 343 if (count < 0) 344 return (-1); 345 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); 346 return (rmtcall("ioctl", buf)); 347 } 348 349 static int 350 rmtcall(cmd, buf) 351 char *cmd, *buf; 352 { 353 354 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 355 rmtconnaborted(); 356 return (rmtreply(cmd)); 357 } 358 359 static int 360 rmtreply(cmd) 361 char *cmd; 362 { 363 register char *cp; 364 char code[30], emsg[BUFSIZ]; 365 366 rmtgets(code, sizeof (code)); 367 if (*code == 'E' || *code == 'F') { 368 rmtgets(emsg, sizeof (emsg)); 369 msg("%s: %s", cmd, emsg); 370 if (*code == 'F') { 371 rmtstate = TS_CLOSED; 372 return (-1); 373 } 374 return (-1); 375 } 376 if (*code != 'A') { 377 /* Kill trailing newline */ 378 cp = code + strlen(code); 379 if (cp > code && *--cp == '\n') 380 *cp = '\0'; 381 382 msg("Protocol to remote tape server botched (code \"%s\").\n", 383 code); 384 rmtconnaborted(); 385 } 386 return (atoi(code + 1)); 387 } 388 389 int 390 rmtgetb() 391 { 392 char c; 393 394 if (read(rmtape, &c, 1) != 1) 395 rmtconnaborted(); 396 return (c); 397 } 398 399 /* Get a line (guaranteed to have a trailing newline). */ 400 void 401 rmtgets(line, len) 402 char *line; 403 int len; 404 { 405 register char *cp = line; 406 407 while (len > 1) { 408 *cp = rmtgetb(); 409 if (*cp == '\n') { 410 cp[1] = '\0'; 411 return; 412 } 413 cp++; 414 len--; 415 } 416 *cp = '\0'; 417 msg("Protocol to remote tape server botched.\n"); 418 msg("(rmtgets got \"%s\").\n", line); 419 rmtconnaborted(); 420 } 421