1 /* $OpenBSD: dumprmt.c,v 1.14 2001/01/19 17:57:34 deraadt Exp $ */ 2 /* $NetBSD: dumprmt.c,v 1.17 1997/06/05 16:10:47 mrg Exp $ */ 3 4 /*- 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)dumprmt.c 8.1 (Berkeley) 6/5/93"; 40 #else 41 static char rcsid[] = "$NetBSD: dumprmt.c,v 1.10 1996/03/15 22:39:26 scottr Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/mtio.h> 47 #include <sys/ioctl.h> 48 #include <sys/socket.h> 49 #include <sys/time.h> 50 #ifdef sunos 51 #include <sys/vnode.h> 52 53 #include <ufs/inode.h> 54 #else 55 #include <ufs/ufs/dinode.h> 56 #endif 57 58 #include <netinet/in.h> 59 #include <netinet/tcp.h> 60 61 #include <protocols/dumprestore.h> 62 63 #include <ctype.h> 64 #include <err.h> 65 #include <netdb.h> 66 #include <errno.h> 67 #include <pwd.h> 68 #include <signal.h> 69 #include <stdio.h> 70 #ifdef __STDC__ 71 #include <stdlib.h> 72 #include <string.h> 73 #include <unistd.h> 74 #endif 75 76 #include "pathnames.h" 77 #include "dump.h" 78 79 #define TS_CLOSED 0 80 #define TS_OPEN 1 81 82 static int rmtstate = TS_CLOSED; 83 static int rmtape; 84 static char *rmtpeer; 85 86 static int okname __P((char *)); 87 static int rmtcall __P((char *, char *)); 88 static void rmtconnaborted __P((/* int, int */)); 89 static int rmtgetb __P((void)); 90 static void rmtgetconn __P((void)); 91 static void rmtgets __P((char *, int)); 92 static int rmtreply __P((char *)); 93 94 extern int ntrec; /* blocking factor on tape */ 95 96 int 97 rmthost(host) 98 char *host; 99 { 100 101 rmtpeer = malloc(strlen(host) + 1); 102 if (rmtpeer) 103 strcpy(rmtpeer, host); 104 else 105 rmtpeer = host; 106 signal(SIGPIPE, rmtconnaborted); 107 rmtgetconn(); 108 if (rmtape < 0) 109 return (0); 110 return (1); 111 } 112 113 static void 114 rmtconnaborted() 115 { 116 /* XXX signal race */ 117 errx(X_ABORT, "Lost connection to remote host."); 118 } 119 120 void 121 rmtgetconn() 122 { 123 register char *cp; 124 static struct servent *sp = NULL; 125 static struct passwd *pwd = NULL; 126 static int on = 1; 127 char *tuser, *name; 128 int size; 129 int maxseg; 130 131 if (sp == NULL) { 132 sp = getservbyname("shell", "tcp"); 133 if (sp == NULL) 134 errx(X_STARTUP, "shell/tcp: unknown service"); 135 pwd = getpwuid(getuid()); 136 if (pwd == NULL) 137 errx(X_STARTUP, "who are you?"); 138 } 139 if ((name = strdup(pwd->pw_name)) == NULL) 140 err(X_STARTUP, "malloc"); 141 if ((cp = strchr(rmtpeer, '@')) != NULL) { 142 tuser = rmtpeer; 143 *cp = '\0'; 144 if (!okname(tuser)) 145 exit(X_STARTUP); 146 rmtpeer = ++cp; 147 } else 148 tuser = name; 149 150 rmtape = rcmd(&rmtpeer, sp->s_port, name, tuser, _PATH_RMT, NULL); 151 (void)free(name); 152 if (rmtape < 0) 153 return; 154 155 size = ntrec * TP_BSIZE; 156 if (size > 60 * 1024) /* XXX */ 157 size = 60 * 1024; 158 /* Leave some space for rmt request/response protocol */ 159 size += 2 * 1024; 160 while (size > TP_BSIZE && 161 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof(size)) < 0) 162 size -= TP_BSIZE; 163 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)); 164 165 maxseg = 1024; 166 (void)setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG, &maxseg, 167 sizeof(maxseg)); 168 169 (void) setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); 170 } 171 172 static int 173 okname(cp0) 174 char *cp0; 175 { 176 register char *cp; 177 register int c; 178 179 for (cp = cp0; *cp; cp++) { 180 c = *cp; 181 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 182 warnx("invalid user name: %s", 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)snprintf(buf, sizeof(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; 218 219 (void)snprintf(line, sizeof(line), "R%d\n", count); 220 n = rmtcall("read", line); 221 if (n < 0) { 222 errno = n; 223 return (-1); 224 } 225 for (i = 0; i < n; i += cc) { 226 cc = read(rmtape, buf+i, n - i); 227 if (cc <= 0) { 228 rmtconnaborted(); 229 } 230 } 231 return (n); 232 } 233 234 int 235 rmtwrite(buf, count) 236 char *buf; 237 int count; 238 { 239 char line[30]; 240 241 (void)snprintf(line, sizeof(line), "W%d\n", count); 242 write(rmtape, line, strlen(line)); 243 write(rmtape, buf, count); 244 return (rmtreply("write")); 245 } 246 247 void 248 rmtwrite0(count) 249 int count; 250 { 251 char line[30]; 252 253 (void)snprintf(line, sizeof(line), "W%d\n", count); 254 write(rmtape, line, strlen(line)); 255 } 256 257 void 258 rmtwrite1(buf, count) 259 char *buf; 260 int count; 261 { 262 263 write(rmtape, buf, count); 264 } 265 266 int 267 rmtwrite2() 268 { 269 270 return (rmtreply("write")); 271 } 272 273 int 274 rmtseek(offset, pos) 275 int offset, pos; 276 { 277 char line[80]; 278 279 (void)snprintf(line, sizeof(line), "L%d\n%d\n", offset, pos); 280 return (rmtcall("seek", line)); 281 } 282 283 struct mtget mts; 284 285 struct mtget * 286 rmtstatus() 287 { 288 register int i; 289 register char *cp; 290 291 if (rmtstate != TS_OPEN) 292 return (NULL); 293 rmtcall("status", "S\n"); 294 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 295 *cp++ = rmtgetb(); 296 return (&mts); 297 } 298 299 int 300 rmtioctl(cmd, count) 301 int cmd, count; 302 { 303 char buf[256]; 304 305 if (count < 0) 306 return (-1); 307 (void)snprintf(buf, sizeof(buf), "I%d\n%d\n", cmd, count); 308 return (rmtcall("ioctl", buf)); 309 } 310 311 static int 312 rmtcall(cmd, buf) 313 char *cmd, *buf; 314 { 315 316 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 317 rmtconnaborted(); 318 return (rmtreply(cmd)); 319 } 320 321 static int 322 rmtreply(cmd) 323 char *cmd; 324 { 325 register char *cp; 326 char code[30], emsg[BUFSIZ]; 327 328 rmtgets(code, sizeof(code)); 329 if (*code == 'E' || *code == 'F') { 330 rmtgets(emsg, sizeof(emsg)); 331 msg("%s: %s", cmd, emsg); 332 errno = atoi(&code[1]); 333 if (*code == 'F') 334 rmtstate = TS_CLOSED; 335 return (-1); 336 } 337 if (*code != 'A') { 338 /* Kill trailing newline */ 339 cp = code + strlen(code); 340 if (cp > code && *--cp == '\n') 341 *cp = '\0'; 342 343 msg("Protocol to remote tape server botched (code \"%s\").\n", 344 code); 345 rmtconnaborted(); 346 } 347 return (atoi(code + 1)); 348 } 349 350 int 351 rmtgetb() 352 { 353 char c; 354 355 if (read(rmtape, &c, 1) != 1) 356 rmtconnaborted(); 357 return (c); 358 } 359 360 /* Get a line (guaranteed to have a trailing newline). */ 361 void 362 rmtgets(line, len) 363 char *line; 364 int len; 365 { 366 register char *cp = line; 367 368 while (len > 1) { 369 *cp = rmtgetb(); 370 if (*cp == '\n') { 371 cp[1] = '\0'; 372 return; 373 } 374 cp++; 375 len--; 376 } 377 *cp = '\0'; 378 msg("Protocol to remote tape server botched.\n"); 379 msg("(rmtgets got \"%s\").\n", line); 380 rmtconnaborted(); 381 } 382