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/tcp.h> 53 54 #include <protocols/dumprestore.h> 55 56 #include <ctype.h> 57 #include <netdb.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #ifdef __STDC__ 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 85 extern int ntrec; /* blocking factor on tape */ 86 87 int 88 rmthost(host) 89 char *host; 90 { 91 92 rmtpeer = malloc(strlen(host) + 1); 93 if (rmtpeer) 94 strcpy(rmtpeer, host); 95 else 96 rmtpeer = host; 97 signal(SIGPIPE, rmtconnaborted); 98 rmtgetconn(); 99 if (rmtape < 0) 100 return (0); 101 return (1); 102 } 103 104 static void 105 rmtconnaborted() 106 { 107 108 (void) fprintf(stderr, "rdump: Lost connection to remote host.\n"); 109 exit(1); 110 } 111 112 void 113 rmtgetconn() 114 { 115 register char *cp; 116 register const char *rmt; 117 static struct servent *sp = NULL; 118 static struct passwd *pwd = NULL; 119 #ifdef notdef 120 static int on = 1; 121 #endif 122 char *tuser; 123 int size; 124 int maxseg; 125 126 if (sp == NULL) { 127 sp = getservbyname("shell", "tcp"); 128 if (sp == NULL) { 129 (void) fprintf(stderr, 130 "rdump: shell/tcp: unknown service\n"); 131 exit(1); 132 } 133 pwd = getpwuid(getuid()); 134 if (pwd == NULL) { 135 (void) fprintf(stderr, "rdump: who are you?\n"); 136 exit(1); 137 } 138 } 139 if ((cp = index(rmtpeer, '@')) != NULL) { 140 tuser = rmtpeer; 141 *cp = '\0'; 142 if (!okname(tuser)) 143 exit(1); 144 rmtpeer = ++cp; 145 } else 146 tuser = pwd->pw_name; 147 if ((rmt = getenv("RMT")) == NULL) 148 rmt = _PATH_RMT; 149 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser, 150 rmt, (int *)0); 151 size = ntrec * TP_BSIZE; 152 if (size > 60 * 1024) /* XXX */ 153 size = 60 * 1024; 154 /* Leave some space for rmt request/response protocol */ 155 size += 2 * 1024; 156 while (size > TP_BSIZE && 157 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 158 size -= TP_BSIZE; 159 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 160 maxseg = 1024; 161 if (setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG, 162 &maxseg, sizeof (maxseg)) < 0) 163 perror("TCP_MAXSEG setsockopt"); 164 165 #ifdef notdef 166 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 167 perror("TCP_NODELAY setsockopt"); 168 #endif 169 } 170 171 static int 172 okname(cp0) 173 char *cp0; 174 { 175 register char *cp; 176 register int c; 177 178 for (cp = cp0; *cp; cp++) { 179 c = *cp; 180 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 181 (void) fprintf(stderr, "rdump: invalid user name %s\n", 182 cp0); 183 return (0); 184 } 185 } 186 return (1); 187 } 188 189 int 190 rmtopen(tape, mode) 191 char *tape; 192 int mode; 193 { 194 char buf[256]; 195 196 (void)sprintf(buf, "O%s\n%d\n", tape, mode); 197 rmtstate = TS_OPEN; 198 return (rmtcall(tape, buf)); 199 } 200 201 void 202 rmtclose() 203 { 204 205 if (rmtstate != TS_OPEN) 206 return; 207 rmtcall("close", "C\n"); 208 rmtstate = TS_CLOSED; 209 } 210 211 int 212 rmtread(buf, count) 213 char *buf; 214 int count; 215 { 216 char line[30]; 217 int n, i, cc; 218 extern errno; 219 220 (void)sprintf(line, "R%d\n", count); 221 n = rmtcall("read", line); 222 if (n < 0) { 223 errno = n; 224 return (-1); 225 } 226 for (i = 0; i < n; i += cc) { 227 cc = read(rmtape, buf+i, n - i); 228 if (cc <= 0) { 229 rmtconnaborted(); 230 } 231 } 232 return (n); 233 } 234 235 int 236 rmtwrite(buf, count) 237 char *buf; 238 int count; 239 { 240 char line[30]; 241 242 (void)sprintf(line, "W%d\n", count); 243 write(rmtape, line, strlen(line)); 244 write(rmtape, buf, count); 245 return (rmtreply("write")); 246 } 247 248 void 249 rmtwrite0(count) 250 int count; 251 { 252 char line[30]; 253 254 (void)sprintf(line, "W%d\n", count); 255 write(rmtape, line, strlen(line)); 256 } 257 258 void 259 rmtwrite1(buf, count) 260 char *buf; 261 int count; 262 { 263 264 write(rmtape, buf, count); 265 } 266 267 int 268 rmtwrite2() 269 { 270 271 return (rmtreply("write")); 272 } 273 274 int 275 rmtseek(offset, pos) 276 int offset, pos; 277 { 278 char line[80]; 279 280 (void)sprintf(line, "L%d\n%d\n", offset, pos); 281 return (rmtcall("seek", line)); 282 } 283 284 struct mtget mts; 285 286 struct mtget * 287 rmtstatus() 288 { 289 register int i; 290 register char *cp; 291 292 if (rmtstate != TS_OPEN) 293 return (NULL); 294 rmtcall("status", "S\n"); 295 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 296 *cp++ = rmtgetb(); 297 return (&mts); 298 } 299 300 int 301 rmtioctl(cmd, count) 302 int cmd, count; 303 { 304 char buf[256]; 305 306 if (count < 0) 307 return (-1); 308 (void)sprintf(buf, "I%d\n%d\n", cmd, count); 309 return (rmtcall("ioctl", buf)); 310 } 311 312 static int 313 rmtcall(cmd, buf) 314 char *cmd, *buf; 315 { 316 317 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 318 rmtconnaborted(); 319 return (rmtreply(cmd)); 320 } 321 322 static int 323 rmtreply(cmd) 324 char *cmd; 325 { 326 register char *cp; 327 char code[30], emsg[BUFSIZ]; 328 329 rmtgets(code, sizeof (code)); 330 if (*code == 'E' || *code == 'F') { 331 rmtgets(emsg, sizeof (emsg)); 332 msg("%s: %s", cmd, emsg); 333 if (*code == 'F') { 334 rmtstate = TS_CLOSED; 335 return (-1); 336 } 337 return (-1); 338 } 339 if (*code != 'A') { 340 /* Kill trailing newline */ 341 cp = code + strlen(code); 342 if (cp > code && *--cp == '\n') 343 *cp = '\0'; 344 345 msg("Protocol to remote tape server botched (code \"%s\").\n", 346 code); 347 rmtconnaborted(); 348 } 349 return (atoi(code + 1)); 350 } 351 352 int 353 rmtgetb() 354 { 355 char c; 356 357 if (read(rmtape, &c, 1) != 1) 358 rmtconnaborted(); 359 return (c); 360 } 361 362 /* Get a line (guaranteed to have a trailing newline). */ 363 void 364 rmtgets(line, len) 365 char *line; 366 int len; 367 { 368 register char *cp = line; 369 370 while (len > 1) { 371 *cp = rmtgetb(); 372 if (*cp == '\n') { 373 cp[1] = '\0'; 374 return; 375 } 376 cp++; 377 len--; 378 } 379 *cp = '\0'; 380 msg("Protocol to remote tape server botched.\n"); 381 msg("(rmtgets got \"%s\").\n", line); 382 rmtconnaborted(); 383 } 384