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 * @(#)dumprmt.c 8.3 (Berkeley) 4/28/95 34 * $FreeBSD: src/sbin/dump/dumprmt.c,v 1.14.2.1 2000/07/01 06:31:52 ps Exp $ 35 * $DragonFly: src/sbin/dump/dumprmt.c,v 1.5 2003/11/01 17:15:58 drhodus Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/mtio.h> 40 #include <sys/socket.h> 41 #include <sys/time.h> 42 #ifdef sunos 43 #include <sys/vnode.h> 44 45 #include <ufs/inode.h> 46 #else 47 #include <vfs/ufs/dinode.h> 48 #endif 49 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> 52 #include <netinet/ip.h> 53 #include <netinet/tcp.h> 54 55 #include <protocols/dumprestore.h> 56 57 #include <ctype.h> 58 #include <netdb.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #ifdef __STDC__ 62 #include <errno.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 #endif 67 68 #include "pathnames.h" 69 #include "dump.h" 70 71 #define TS_CLOSED 0 72 #define TS_OPEN 1 73 74 static int rmtstate = TS_CLOSED; 75 static int rmtape; 76 static char *rmtpeer; 77 78 static int okname(char *); 79 static int rmtcall(char *, char *); 80 static void rmtconnaborted(/* int, int */); 81 static int rmtgetb(void); 82 static void rmtgetconn(void); 83 static void rmtgets(char *, int); 84 static int rmtreply(char *); 85 #ifdef KERBEROS 86 int krcmd(char **, int /*u_short*/, char *, char *, int *, char *); 87 #endif 88 89 static int errfd = -1; 90 extern int dokerberos; 91 extern int ntrec; /* blocking factor on tape */ 92 93 int 94 rmthost(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(void) 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(void) 138 { 139 register char *cp; 140 register 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(char *cp0) 205 { 206 register char *cp; 207 register int c; 208 209 for (cp = cp0; *cp; cp++) { 210 c = *cp; 211 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 212 msg("invalid user name %s\n", cp0); 213 return (0); 214 } 215 } 216 return (1); 217 } 218 219 int 220 rmtopen(char *tape, int mode) 221 { 222 char buf[256]; 223 224 (void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode); 225 rmtstate = TS_OPEN; 226 return (rmtcall(tape, buf)); 227 } 228 229 void 230 rmtclose(void) 231 { 232 233 if (rmtstate != TS_OPEN) 234 return; 235 rmtcall("close", "C\n"); 236 rmtstate = TS_CLOSED; 237 } 238 239 int 240 rmtread(char *buf, int count) 241 { 242 char line[30]; 243 int n, i, cc; 244 245 (void)snprintf(line, sizeof (line), "R%d\n", count); 246 n = rmtcall("read", line); 247 if (n < 0) 248 /* rmtcall() properly sets errno for us on errors. */ 249 return (n); 250 for (i = 0; i < n; i += cc) { 251 cc = read(rmtape, buf+i, n - i); 252 if (cc <= 0) 253 rmtconnaborted(); 254 } 255 return (n); 256 } 257 258 int 259 rmtwrite(char *buf, int count) 260 { 261 char line[30]; 262 263 (void)snprintf(line, sizeof (line), "W%d\n", count); 264 write(rmtape, line, strlen(line)); 265 write(rmtape, buf, count); 266 return (rmtreply("write")); 267 } 268 269 void 270 rmtwrite0(int count) 271 { 272 char line[30]; 273 274 (void)snprintf(line, sizeof (line), "W%d\n", count); 275 write(rmtape, line, strlen(line)); 276 } 277 278 void 279 rmtwrite1(char *buf, int count) 280 { 281 282 write(rmtape, buf, count); 283 } 284 285 int 286 rmtwrite2(void) 287 { 288 289 return (rmtreply("write")); 290 } 291 292 int 293 rmtseek(int offset, int pos) 294 { 295 char line[80]; 296 297 (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); 298 return (rmtcall("seek", line)); 299 } 300 301 struct mtget mts; 302 303 struct mtget * 304 rmtstatus(void) 305 { 306 register int i; 307 register char *cp; 308 309 if (rmtstate != TS_OPEN) 310 return (NULL); 311 rmtcall("status", "S\n"); 312 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 313 *cp++ = rmtgetb(); 314 return (&mts); 315 } 316 317 int 318 rmtioctl(int cmd, int count) 319 { 320 char buf[256]; 321 322 if (count < 0) 323 return (-1); 324 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); 325 return (rmtcall("ioctl", buf)); 326 } 327 328 static int 329 rmtcall(char *cmd, char *buf) 330 { 331 332 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 333 rmtconnaborted(); 334 return (rmtreply(cmd)); 335 } 336 337 static int 338 rmtreply(char *cmd) 339 { 340 register char *cp; 341 char code[30], emsg[BUFSIZ]; 342 343 rmtgets(code, sizeof (code)); 344 if (*code == 'E' || *code == 'F') { 345 rmtgets(emsg, sizeof (emsg)); 346 msg("%s: %s", cmd, emsg); 347 errno = atoi(code + 1); 348 if (*code == 'F') 349 rmtstate = TS_CLOSED; 350 return (-1); 351 } 352 if (*code != 'A') { 353 /* Kill trailing newline */ 354 cp = code + strlen(code); 355 if (cp > code && *--cp == '\n') 356 *cp = '\0'; 357 358 msg("Protocol to remote tape server botched (code \"%s\").\n", 359 code); 360 rmtconnaborted(); 361 } 362 return (atoi(code + 1)); 363 } 364 365 int 366 rmtgetb(void) 367 { 368 char c; 369 370 if (read(rmtape, &c, 1) != 1) 371 rmtconnaborted(); 372 return (c); 373 } 374 375 /* Get a line (guaranteed to have a trailing newline). */ 376 void 377 rmtgets(char *line, int len) 378 { 379 register char *cp = line; 380 381 while (len > 1) { 382 *cp = rmtgetb(); 383 if (*cp == '\n') { 384 cp[1] = '\0'; 385 return; 386 } 387 cp++; 388 len--; 389 } 390 *cp = '\0'; 391 msg("Protocol to remote tape server botched.\n"); 392 msg("(rmtgets got \"%s\").\n", line); 393 rmtconnaborted(); 394 } 395