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 8.1 (Berkeley) 6/5/93"; 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 <netdb.h> 59 #include <pwd.h> 60 #include <signal.h> 61 #include <stdio.h> 62 #ifdef __STDC__ 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 #endif 67 68 #include "pathnames.h" 69 #include "dump.h" 70 71 #define TS_CLOSED 0 72 #define TS_OPEN 1 73 74 static int rmtstate = TS_CLOSED; 75 static int rmtape; 76 static char *rmtpeer; 77 78 static int okname __P((char *)); 79 static int rmtcall __P((char *, char *)); 80 static void rmtconnaborted __P((/* int, int */)); 81 static int rmtgetb __P((void)); 82 static void rmtgetconn __P((void)); 83 static void rmtgets __P((char *, int)); 84 static int rmtreply __P((char *)); 85 86 static int errfd = -1; 87 88 extern int ntrec; /* blocking factor on tape */ 89 90 int 91 rmthost(host) 92 char *host; 93 { 94 95 rmtpeer = malloc(strlen(host) + 1); 96 if (rmtpeer) 97 strcpy(rmtpeer, host); 98 else 99 rmtpeer = host; 100 signal(SIGPIPE, rmtconnaborted); 101 rmtgetconn(); 102 if (rmtape < 0) 103 return (0); 104 return (1); 105 } 106 107 static void 108 rmtconnaborted() 109 { 110 msg("Lost connection to remote host.\n"); 111 if (errfd != -1) { 112 fd_set r; 113 struct timeval t; 114 115 FD_ZERO(&r); 116 FD_SET(errfd, &r); 117 t.tv_sec = 0; 118 t.tv_usec = 0; 119 if (select(errfd + 1, &r, NULL, NULL, &t)) { 120 int i; 121 char buf[2048]; 122 123 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { 124 buf[i] = '\0'; 125 msg("on %s: %s%s", rmtpeer, buf, 126 buf[i - 1] == '\n' ? "" : "\n"); 127 } 128 } 129 } 130 131 exit(X_ABORT); 132 } 133 134 void 135 rmtgetconn() 136 { 137 register char *cp; 138 register const char *rmt; 139 static struct servent *sp = NULL; 140 static struct passwd *pwd = NULL; 141 #ifdef notdef 142 static int on = 1; 143 #endif 144 char *tuser; 145 int size; 146 int throughput; 147 148 if (sp == NULL) { 149 sp = getservbyname("shell", "tcp"); 150 if (sp == NULL) { 151 msg("shell/tcp: unknown service\n"); 152 exit(X_ABORT); 153 } 154 pwd = getpwuid(getuid()); 155 if (pwd == NULL) { 156 msg("who are you?\n"); 157 exit(X_ABORT); 158 } 159 } 160 if ((cp = index(rmtpeer, '@')) != NULL) { 161 tuser = rmtpeer; 162 *cp = '\0'; 163 if (!okname(tuser)) 164 exit(X_ABORT); 165 rmtpeer = ++cp; 166 } else 167 tuser = pwd->pw_name; 168 if ((rmt = getenv("RMT")) == NULL) 169 rmt = _PATH_RMT; 170 msg(""); 171 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser, 172 rmt, &errfd); 173 if (rmtape < 0) { 174 msg("login to %s as %s failed.\n", rmtpeer, tuser); 175 return; 176 } 177 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer); 178 size = ntrec * TP_BSIZE; 179 if (size > 60 * 1024) /* XXX */ 180 size = 60 * 1024; 181 /* Leave some space for rmt request/response protocol */ 182 size += 2 * 1024; 183 while (size > TP_BSIZE && 184 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 185 size -= TP_BSIZE; 186 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 187 throughput = IPTOS_THROUGHPUT; 188 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS, 189 &throughput, sizeof(throughput)) < 0) 190 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); 191 192 #ifdef notdef 193 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 194 perror("TCP_NODELAY setsockopt"); 195 #endif 196 } 197 198 static int 199 okname(cp0) 200 char *cp0; 201 { 202 register char *cp; 203 register int c; 204 205 for (cp = cp0; *cp; cp++) { 206 c = *cp; 207 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 208 msg("invalid user name %s\n", cp0); 209 return (0); 210 } 211 } 212 return (1); 213 } 214 215 int 216 rmtopen(tape, mode) 217 char *tape; 218 int mode; 219 { 220 char buf[256]; 221 222 (void)sprintf(buf, "O%s\n%d\n", tape, mode); 223 rmtstate = TS_OPEN; 224 return (rmtcall(tape, buf)); 225 } 226 227 void 228 rmtclose() 229 { 230 231 if (rmtstate != TS_OPEN) 232 return; 233 rmtcall("close", "C\n"); 234 rmtstate = TS_CLOSED; 235 } 236 237 int 238 rmtread(buf, count) 239 char *buf; 240 int count; 241 { 242 char line[30]; 243 int n, i, cc; 244 extern errno; 245 246 (void)sprintf(line, "R%d\n", count); 247 n = rmtcall("read", line); 248 if (n < 0) { 249 errno = n; 250 return (-1); 251 } 252 for (i = 0; i < n; i += cc) { 253 cc = read(rmtape, buf+i, n - i); 254 if (cc <= 0) { 255 rmtconnaborted(); 256 } 257 } 258 return (n); 259 } 260 261 int 262 rmtwrite(buf, count) 263 char *buf; 264 int count; 265 { 266 char line[30]; 267 268 (void)sprintf(line, "W%d\n", count); 269 write(rmtape, line, strlen(line)); 270 write(rmtape, buf, count); 271 return (rmtreply("write")); 272 } 273 274 void 275 rmtwrite0(count) 276 int count; 277 { 278 char line[30]; 279 280 (void)sprintf(line, "W%d\n", count); 281 write(rmtape, line, strlen(line)); 282 } 283 284 void 285 rmtwrite1(buf, count) 286 char *buf; 287 int count; 288 { 289 290 write(rmtape, buf, count); 291 } 292 293 int 294 rmtwrite2() 295 { 296 297 return (rmtreply("write")); 298 } 299 300 int 301 rmtseek(offset, pos) 302 int offset, pos; 303 { 304 char line[80]; 305 306 (void)sprintf(line, "L%d\n%d\n", offset, pos); 307 return (rmtcall("seek", line)); 308 } 309 310 struct mtget mts; 311 312 struct mtget * 313 rmtstatus() 314 { 315 register int i; 316 register char *cp; 317 318 if (rmtstate != TS_OPEN) 319 return (NULL); 320 rmtcall("status", "S\n"); 321 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 322 *cp++ = rmtgetb(); 323 return (&mts); 324 } 325 326 int 327 rmtioctl(cmd, count) 328 int cmd, count; 329 { 330 char buf[256]; 331 332 if (count < 0) 333 return (-1); 334 (void)sprintf(buf, "I%d\n%d\n", cmd, count); 335 return (rmtcall("ioctl", buf)); 336 } 337 338 static int 339 rmtcall(cmd, buf) 340 char *cmd, *buf; 341 { 342 343 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 344 rmtconnaborted(); 345 return (rmtreply(cmd)); 346 } 347 348 static int 349 rmtreply(cmd) 350 char *cmd; 351 { 352 register char *cp; 353 char code[30], emsg[BUFSIZ]; 354 355 rmtgets(code, sizeof (code)); 356 if (*code == 'E' || *code == 'F') { 357 rmtgets(emsg, sizeof (emsg)); 358 msg("%s: %s", cmd, emsg); 359 if (*code == 'F') { 360 rmtstate = TS_CLOSED; 361 return (-1); 362 } 363 return (-1); 364 } 365 if (*code != 'A') { 366 /* Kill trailing newline */ 367 cp = code + strlen(code); 368 if (cp > code && *--cp == '\n') 369 *cp = '\0'; 370 371 msg("Protocol to remote tape server botched (code \"%s\").\n", 372 code); 373 rmtconnaborted(); 374 } 375 return (atoi(code + 1)); 376 } 377 378 int 379 rmtgetb() 380 { 381 char c; 382 383 if (read(rmtape, &c, 1) != 1) 384 rmtconnaborted(); 385 return (c); 386 } 387 388 /* Get a line (guaranteed to have a trailing newline). */ 389 void 390 rmtgets(line, len) 391 char *line; 392 int len; 393 { 394 register char *cp = line; 395 396 while (len > 1) { 397 *cp = rmtgetb(); 398 if (*cp == '\n') { 399 cp[1] = '\0'; 400 return; 401 } 402 cp++; 403 len--; 404 } 405 *cp = '\0'; 406 msg("Protocol to remote tape server botched.\n"); 407 msg("(rmtgets got \"%s\").\n", line); 408 rmtconnaborted(); 409 } 410