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