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[] = "from: @(#)dumprmt.c 8.1 (Berkeley) 6/5/93";*/ 36 static char *rcsid = "$Id: dumprmt.c,v 1.8 1994/09/23 14:27:03 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <sys/mtio.h> 41 #include <sys/ioctl.h> 42 #include <sys/socket.h> 43 #include <sys/time.h> 44 #ifdef sunos 45 #include <sys/vnode.h> 46 47 #include <ufs/inode.h> 48 #else 49 #include <ufs/ufs/dinode.h> 50 #endif 51 52 #include <netinet/in.h> 53 #include <netinet/tcp.h> 54 55 #include <protocols/dumprestore.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <netdb.h> 60 #include <pwd.h> 61 #include <signal.h> 62 #include <stdio.h> 63 #ifdef __STDC__ 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #endif 68 69 #include "pathnames.h" 70 #include "dump.h" 71 72 #define TS_CLOSED 0 73 #define TS_OPEN 1 74 75 static int rmtstate = TS_CLOSED; 76 static int rmtape; 77 static char *rmtpeer; 78 79 static int okname __P((char *)); 80 static int rmtcall __P((char *, char *)); 81 static void rmtconnaborted __P((/* int, int */)); 82 static int rmtgetb __P((void)); 83 static void rmtgetconn __P((void)); 84 static void rmtgets __P((char *, int)); 85 static int rmtreply __P((char *)); 86 87 extern int ntrec; /* blocking factor on tape */ 88 89 int 90 rmthost(host) 91 char *host; 92 { 93 94 rmtpeer = malloc(strlen(host) + 1); 95 if (rmtpeer) 96 strcpy(rmtpeer, host); 97 else 98 rmtpeer = host; 99 signal(SIGPIPE, rmtconnaborted); 100 rmtgetconn(); 101 if (rmtape < 0) 102 return (0); 103 return (1); 104 } 105 106 static void 107 rmtconnaborted() 108 { 109 110 errx(1, "Lost connection to remote host."); 111 } 112 113 void 114 rmtgetconn() 115 { 116 register char *cp; 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 errx(1, "shell/tcp: unknown service"); 130 pwd = getpwuid(getuid()); 131 if (pwd == NULL) 132 errx(1, "who are you?"); 133 } 134 if ((cp = strchr(rmtpeer, '@')) != NULL) { 135 tuser = rmtpeer; 136 *cp = '\0'; 137 if (!okname(tuser)) 138 exit(1); 139 rmtpeer = ++cp; 140 } else 141 tuser = pwd->pw_name; 142 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser, 143 _PATH_RMT, (int *)0); 144 size = ntrec * TP_BSIZE; 145 if (size > 60 * 1024) /* XXX */ 146 size = 60 * 1024; 147 /* Leave some space for rmt request/response protocol */ 148 size += 2 * 1024; 149 while (size > TP_BSIZE && 150 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 151 size -= TP_BSIZE; 152 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 153 maxseg = 1024; 154 if (setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG, 155 &maxseg, sizeof (maxseg)) < 0) 156 perror("TCP_MAXSEG setsockopt"); 157 158 #ifdef notdef 159 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 160 perror("TCP_NODELAY setsockopt"); 161 #endif 162 } 163 164 static int 165 okname(cp0) 166 char *cp0; 167 { 168 register char *cp; 169 register int c; 170 171 for (cp = cp0; *cp; cp++) { 172 c = *cp; 173 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 174 warnx("invalid user name: %s", cp0); 175 return (0); 176 } 177 } 178 return (1); 179 } 180 181 int 182 rmtopen(tape, mode) 183 char *tape; 184 int mode; 185 { 186 char buf[256]; 187 188 (void)sprintf(buf, "O%s\n%d\n", tape, mode); 189 rmtstate = TS_OPEN; 190 return (rmtcall(tape, buf)); 191 } 192 193 void 194 rmtclose() 195 { 196 197 if (rmtstate != TS_OPEN) 198 return; 199 rmtcall("close", "C\n"); 200 rmtstate = TS_CLOSED; 201 } 202 203 int 204 rmtread(buf, count) 205 char *buf; 206 int count; 207 { 208 char line[30]; 209 int n, i, cc; 210 extern errno; 211 212 (void)sprintf(line, "R%d\n", count); 213 n = rmtcall("read", line); 214 if (n < 0) { 215 errno = n; 216 return (-1); 217 } 218 for (i = 0; i < n; i += cc) { 219 cc = read(rmtape, buf+i, n - i); 220 if (cc <= 0) { 221 rmtconnaborted(); 222 } 223 } 224 return (n); 225 } 226 227 int 228 rmtwrite(buf, count) 229 char *buf; 230 int count; 231 { 232 char line[30]; 233 234 (void)sprintf(line, "W%d\n", count); 235 write(rmtape, line, strlen(line)); 236 write(rmtape, buf, count); 237 return (rmtreply("write")); 238 } 239 240 void 241 rmtwrite0(count) 242 int count; 243 { 244 char line[30]; 245 246 (void)sprintf(line, "W%d\n", count); 247 write(rmtape, line, strlen(line)); 248 } 249 250 void 251 rmtwrite1(buf, count) 252 char *buf; 253 int count; 254 { 255 256 write(rmtape, buf, count); 257 } 258 259 int 260 rmtwrite2() 261 { 262 263 return (rmtreply("write")); 264 } 265 266 int 267 rmtseek(offset, pos) 268 int offset, pos; 269 { 270 char line[80]; 271 272 (void)sprintf(line, "L%d\n%d\n", offset, pos); 273 return (rmtcall("seek", line)); 274 } 275 276 struct mtget mts; 277 278 struct mtget * 279 rmtstatus() 280 { 281 register int i; 282 register char *cp; 283 284 if (rmtstate != TS_OPEN) 285 return (NULL); 286 rmtcall("status", "S\n"); 287 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 288 *cp++ = rmtgetb(); 289 return (&mts); 290 } 291 292 int 293 rmtioctl(cmd, count) 294 int cmd, count; 295 { 296 char buf[256]; 297 298 if (count < 0) 299 return (-1); 300 (void)sprintf(buf, "I%d\n%d\n", cmd, count); 301 return (rmtcall("ioctl", buf)); 302 } 303 304 static int 305 rmtcall(cmd, buf) 306 char *cmd, *buf; 307 { 308 309 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 310 rmtconnaborted(); 311 return (rmtreply(cmd)); 312 } 313 314 static int 315 rmtreply(cmd) 316 char *cmd; 317 { 318 register char *cp; 319 char code[30], emsg[BUFSIZ]; 320 321 rmtgets(code, sizeof (code)); 322 if (*code == 'E' || *code == 'F') { 323 rmtgets(emsg, sizeof (emsg)); 324 msg("%s: %s", cmd, emsg); 325 if (*code == 'F') { 326 rmtstate = TS_CLOSED; 327 return (-1); 328 } 329 return (-1); 330 } 331 if (*code != 'A') { 332 /* Kill trailing newline */ 333 cp = code + strlen(code); 334 if (cp > code && *--cp == '\n') 335 *cp = '\0'; 336 337 msg("Protocol to remote tape server botched (code \"%s\").\n", 338 code); 339 rmtconnaborted(); 340 } 341 return (atoi(code + 1)); 342 } 343 344 int 345 rmtgetb() 346 { 347 char c; 348 349 if (read(rmtape, &c, 1) != 1) 350 rmtconnaborted(); 351 return (c); 352 } 353 354 /* Get a line (guaranteed to have a trailing newline). */ 355 void 356 rmtgets(line, len) 357 char *line; 358 int len; 359 { 360 register char *cp = line; 361 362 while (len > 1) { 363 *cp = rmtgetb(); 364 if (*cp == '\n') { 365 cp[1] = '\0'; 366 return; 367 } 368 cp++; 369 len--; 370 } 371 *cp = '\0'; 372 msg("Protocol to remote tape server botched.\n"); 373 msg("(rmtgets got \"%s\").\n", line); 374 rmtconnaborted(); 375 } 376