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 #if 0 36 static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #include <sys/mtio.h> 44 #include <sys/socket.h> 45 #include <sys/time.h> 46 #ifdef sunos 47 #include <sys/vnode.h> 48 49 #include <ufs/inode.h> 50 #else 51 #include <ufs/ufs/dinode.h> 52 #endif 53 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 #include <netinet/tcp.h> 58 59 #include <protocols/dumprestore.h> 60 61 #include <ctype.h> 62 #include <netdb.h> 63 #include <pwd.h> 64 #include <stdio.h> 65 #ifdef __STDC__ 66 #include <errno.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 #endif 71 72 #include "pathnames.h" 73 #include "dump.h" 74 75 #define TS_CLOSED 0 76 #define TS_OPEN 1 77 78 static int rmtstate = TS_CLOSED; 79 static int rmtape; 80 static char *rmtpeer; 81 82 static int okname __P((char *)); 83 static int rmtcall __P((char *, char *)); 84 static void rmtconnaborted __P((/* int, int */)); 85 static int rmtgetb __P((void)); 86 static void rmtgetconn __P((void)); 87 static void rmtgets __P((char *, int)); 88 static int rmtreply __P((char *)); 89 #ifdef KERBEROS 90 int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *)); 91 #endif 92 93 static int errfd = -1; 94 extern int dokerberos; 95 extern int ntrec; /* blocking factor on tape */ 96 97 int 98 rmthost(host) 99 char *host; 100 { 101 102 rmtpeer = malloc(strlen(host) + 1); 103 if (rmtpeer) 104 strcpy(rmtpeer, host); 105 else 106 rmtpeer = host; 107 signal(SIGPIPE, rmtconnaborted); 108 rmtgetconn(); 109 if (rmtape < 0) 110 return (0); 111 return (1); 112 } 113 114 static void 115 rmtconnaborted() 116 { 117 msg("Lost connection to remote host.\n"); 118 if (errfd != -1) { 119 fd_set r; 120 struct timeval t; 121 122 FD_ZERO(&r); 123 FD_SET(errfd, &r); 124 t.tv_sec = 0; 125 t.tv_usec = 0; 126 if (select(errfd + 1, &r, NULL, NULL, &t)) { 127 int i; 128 char buf[2048]; 129 130 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { 131 buf[i] = '\0'; 132 msg("on %s: %s%s", rmtpeer, buf, 133 buf[i - 1] == '\n' ? "" : "\n"); 134 } 135 } 136 } 137 138 exit(X_ABORT); 139 } 140 141 void 142 rmtgetconn() 143 { 144 register char *cp; 145 register const char *rmt; 146 static struct servent *sp = NULL; 147 static struct passwd *pwd = NULL; 148 char *tuser; 149 int size; 150 int throughput; 151 int on; 152 153 if (sp == NULL) { 154 sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp"); 155 if (sp == NULL) { 156 msg("%s/tcp: unknown service\n", 157 dokerberos ? "kshell" : "shell"); 158 exit(X_STARTUP); 159 } 160 pwd = getpwuid(getuid()); 161 if (pwd == NULL) { 162 msg("who are you?\n"); 163 exit(X_STARTUP); 164 } 165 } 166 if ((cp = strchr(rmtpeer, '@')) != NULL) { 167 tuser = rmtpeer; 168 *cp = '\0'; 169 if (!okname(tuser)) 170 exit(X_STARTUP); 171 rmtpeer = ++cp; 172 } else 173 tuser = pwd->pw_name; 174 if ((rmt = getenv("RMT")) == NULL) 175 rmt = _PATH_RMT; 176 msg(""); 177 #ifdef KERBEROS 178 if (dokerberos) 179 rmtape = krcmd(&rmtpeer, sp->s_port, tuser, rmt, &errfd, 180 (char *)0); 181 else 182 #endif 183 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, 184 tuser, rmt, &errfd); 185 if (rmtape < 0) { 186 msg("login to %s as %s failed.\n", rmtpeer, tuser); 187 return; 188 } 189 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer); 190 size = ntrec * TP_BSIZE; 191 if (size > 60 * 1024) /* XXX */ 192 size = 60 * 1024; 193 /* Leave some space for rmt request/response protocol */ 194 size += 2 * 1024; 195 while (size > TP_BSIZE && 196 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 197 size -= TP_BSIZE; 198 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 199 throughput = IPTOS_THROUGHPUT; 200 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS, 201 &throughput, sizeof(throughput)) < 0) 202 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); 203 on = 1; 204 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 205 perror("TCP_NODELAY setsockopt"); 206 } 207 208 static int 209 okname(cp0) 210 char *cp0; 211 { 212 register char *cp; 213 register int c; 214 215 for (cp = cp0; *cp; cp++) { 216 c = *cp; 217 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 218 msg("invalid user name %s\n", cp0); 219 return (0); 220 } 221 } 222 return (1); 223 } 224 225 int 226 rmtopen(tape, mode) 227 char *tape; 228 int mode; 229 { 230 char buf[256]; 231 232 (void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode); 233 rmtstate = TS_OPEN; 234 return (rmtcall(tape, buf)); 235 } 236 237 void 238 rmtclose() 239 { 240 241 if (rmtstate != TS_OPEN) 242 return; 243 rmtcall("close", "C\n"); 244 rmtstate = TS_CLOSED; 245 } 246 247 int 248 rmtread(buf, count) 249 char *buf; 250 int count; 251 { 252 char line[30]; 253 int n, i, cc; 254 255 (void)snprintf(line, sizeof (line), "R%d\n", count); 256 n = rmtcall("read", line); 257 if (n < 0) 258 /* rmtcall() properly sets errno for us on errors. */ 259 return (n); 260 for (i = 0; i < n; i += cc) { 261 cc = read(rmtape, buf+i, n - i); 262 if (cc <= 0) 263 rmtconnaborted(); 264 } 265 return (n); 266 } 267 268 int 269 rmtwrite(buf, count) 270 char *buf; 271 int count; 272 { 273 char line[30]; 274 275 (void)snprintf(line, sizeof (line), "W%d\n", count); 276 write(rmtape, line, strlen(line)); 277 write(rmtape, buf, count); 278 return (rmtreply("write")); 279 } 280 281 void 282 rmtwrite0(count) 283 int count; 284 { 285 char line[30]; 286 287 (void)snprintf(line, sizeof (line), "W%d\n", count); 288 write(rmtape, line, strlen(line)); 289 } 290 291 void 292 rmtwrite1(buf, count) 293 char *buf; 294 int count; 295 { 296 297 write(rmtape, buf, count); 298 } 299 300 int 301 rmtwrite2() 302 { 303 304 return (rmtreply("write")); 305 } 306 307 int 308 rmtseek(offset, pos) 309 int offset, pos; 310 { 311 char line[80]; 312 313 (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); 314 return (rmtcall("seek", line)); 315 } 316 317 struct mtget mts; 318 319 struct mtget * 320 rmtstatus() 321 { 322 register int i; 323 register char *cp; 324 325 if (rmtstate != TS_OPEN) 326 return (NULL); 327 rmtcall("status", "S\n"); 328 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 329 *cp++ = rmtgetb(); 330 return (&mts); 331 } 332 333 int 334 rmtioctl(cmd, count) 335 int cmd, count; 336 { 337 char buf[256]; 338 339 if (count < 0) 340 return (-1); 341 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); 342 return (rmtcall("ioctl", buf)); 343 } 344 345 static int 346 rmtcall(cmd, buf) 347 char *cmd, *buf; 348 { 349 350 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 351 rmtconnaborted(); 352 return (rmtreply(cmd)); 353 } 354 355 static int 356 rmtreply(cmd) 357 char *cmd; 358 { 359 register char *cp; 360 char code[30], emsg[BUFSIZ]; 361 362 rmtgets(code, sizeof (code)); 363 if (*code == 'E' || *code == 'F') { 364 rmtgets(emsg, sizeof (emsg)); 365 msg("%s: %s", cmd, emsg); 366 errno = atoi(code + 1); 367 if (*code == 'F') 368 rmtstate = TS_CLOSED; 369 return (-1); 370 } 371 if (*code != 'A') { 372 /* Kill trailing newline */ 373 cp = code + strlen(code); 374 if (cp > code && *--cp == '\n') 375 *cp = '\0'; 376 377 msg("Protocol to remote tape server botched (code \"%s\").\n", 378 code); 379 rmtconnaborted(); 380 } 381 return (atoi(code + 1)); 382 } 383 384 int 385 rmtgetb() 386 { 387 char c; 388 389 if (read(rmtape, &c, 1) != 1) 390 rmtconnaborted(); 391 return (c); 392 } 393 394 /* Get a line (guaranteed to have a trailing newline). */ 395 void 396 rmtgets(line, len) 397 char *line; 398 int len; 399 { 400 register char *cp = line; 401 402 while (len > 1) { 403 *cp = rmtgetb(); 404 if (*cp == '\n') { 405 cp[1] = '\0'; 406 return; 407 } 408 cp++; 409 len--; 410 } 411 *cp = '\0'; 412 msg("Protocol to remote tape server botched.\n"); 413 msg("(rmtgets got \"%s\").\n", line); 414 rmtconnaborted(); 415 } 416