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