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 */ 36 37 #include <sys/param.h> 38 #include <sys/mtio.h> 39 #include <sys/socket.h> 40 #include <sys/time.h> 41 #ifdef sunos 42 #include <sys/vnode.h> 43 44 #include <ufs/inode.h> 45 #else 46 #include <vfs/ufs/dinode.h> 47 #endif 48 49 #include <netinet/in.h> 50 #include <netinet/in_systm.h> 51 #include <netinet/ip.h> 52 #include <netinet/tcp.h> 53 54 #include <protocols/dumprestore.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <netdb.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #include <errno.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "pathnames.h" 67 #include "dump.h" 68 69 #define TS_CLOSED 0 70 #define TS_OPEN 1 71 72 static int rmtstate = TS_CLOSED; 73 static int rmtape; 74 static char *rmtpeer; 75 76 static int okname(char *); 77 static int rmtcall(const char *, const char *); 78 static void rmtconnaborted(int); 79 static int rmtgetb(void); 80 static void rmtgetconn(void); 81 static void rmtgets(char *, int); 82 static int rmtreply(const char *); 83 #ifdef KERBEROS 84 int krcmd(char **, int /*u_short*/, char *, char *, int *, char *); 85 #endif 86 87 static int errfd = -1; 88 89 int 90 rmthost(const char *hostname) 91 { 92 93 if ((rmtpeer = strdup(hostname)) == NULL) 94 err(1, "strdup failed"); 95 signal(SIGPIPE, rmtconnaborted); 96 rmtgetconn(); 97 if (rmtape < 0) 98 return (0); 99 return (1); 100 } 101 102 static void 103 rmtconnaborted(int signo __unused) 104 { 105 msg("Lost connection to remote host.\n"); 106 if (errfd != -1) { 107 fd_set r; 108 struct timeval t; 109 110 FD_ZERO(&r); 111 FD_SET(errfd, &r); 112 t.tv_sec = 0; 113 t.tv_usec = 0; 114 if (select(errfd + 1, &r, NULL, NULL, &t)) { 115 int i; 116 char buf[2048]; 117 118 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { 119 buf[i] = '\0'; 120 msg("on %s: %s%s", rmtpeer, buf, 121 buf[i - 1] == '\n' ? "" : "\n"); 122 } 123 } 124 } 125 126 exit(X_ABORT); 127 } 128 129 void 130 rmtgetconn(void) 131 { 132 char *cp; 133 const char *rmt; 134 static struct servent *sp = NULL; 135 static struct passwd *pwd = NULL; 136 char *tuser; 137 int size; 138 int throughput; 139 int on; 140 141 if (sp == NULL) { 142 sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp"); 143 if (sp == NULL) { 144 msg("%s/tcp: unknown service\n", 145 dokerberos ? "kshell" : "shell"); 146 exit(X_STARTUP); 147 } 148 pwd = getpwuid(getuid()); 149 if (pwd == NULL) { 150 msg("who are you?\n"); 151 exit(X_STARTUP); 152 } 153 } 154 if ((cp = strchr(rmtpeer, '@')) != NULL) { 155 tuser = rmtpeer; 156 *cp = '\0'; 157 if (!okname(tuser)) 158 exit(X_STARTUP); 159 rmtpeer = ++cp; 160 } else 161 tuser = pwd->pw_name; 162 if ((rmt = getenv("RMT")) == NULL) 163 rmt = _PATH_RMT; 164 msg("%s", ""); 165 #ifdef KERBEROS 166 if (dokerberos) 167 rmtape = krcmd(&rmtpeer, sp->s_port, tuser, rmt, &errfd, NULL); 168 else 169 #endif 170 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, 171 tuser, rmt, &errfd); 172 if (rmtape < 0) { 173 msg("login to %s as %s failed.\n", rmtpeer, tuser); 174 return; 175 } 176 fprintf(stderr, "Connection to %s established.\n", rmtpeer); 177 size = ntrec * TP_BSIZE; 178 if (size > 60 * 1024) /* XXX */ 179 size = 60 * 1024; 180 /* Leave some space for rmt request/response protocol */ 181 size += 2 * 1024; 182 while (size > TP_BSIZE && 183 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 184 size -= TP_BSIZE; 185 setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 186 throughput = IPTOS_THROUGHPUT; 187 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS, 188 &throughput, sizeof(throughput)) < 0) 189 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); 190 on = 1; 191 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) 192 perror("TCP_NODELAY setsockopt"); 193 } 194 195 static int 196 okname(char *cp0) 197 { 198 char *cp; 199 int c; 200 201 for (cp = cp0; *cp; cp++) { 202 c = *cp; 203 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 204 msg("invalid user name %s\n", cp0); 205 return (0); 206 } 207 } 208 return (1); 209 } 210 211 int 212 rmtopen(const char *rtape, int mode) 213 { 214 char buf[256]; 215 216 snprintf(buf, sizeof (buf), "O%.226s\n%d\n", rtape, mode); 217 rmtstate = TS_OPEN; 218 return (rmtcall(rtape, buf)); 219 } 220 221 void 222 rmtclose(void) 223 { 224 225 if (rmtstate != TS_OPEN) 226 return; 227 rmtcall("close", "C\n"); 228 rmtstate = TS_CLOSED; 229 } 230 231 #ifdef RRESTORE 232 int 233 rmtread(char *buf, int count) 234 { 235 char line[30]; 236 int n, i, cc; 237 238 snprintf(line, sizeof (line), "R%d\n", count); 239 n = rmtcall("read", line); 240 if (n < 0) 241 /* rmtcall() properly sets errno for us on errors. */ 242 return (n); 243 for (i = 0; i < n; i += cc) { 244 cc = read(rmtape, buf+i, n - i); 245 if (cc <= 0) 246 rmtconnaborted(0); 247 } 248 return (n); 249 } 250 251 int 252 rmtseek(int offset, int pos) 253 { 254 char line[80]; 255 256 snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); 257 return (rmtcall("seek", line)); 258 } 259 260 int 261 rmtioctl(int cmd, int count) 262 { 263 char buf[256]; 264 265 if (count < 0) 266 return (-1); 267 snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); 268 return (rmtcall("ioctl", buf)); 269 } 270 #endif /* RRESTORE */ 271 272 int 273 rmtwrite(const void *buf, int count) 274 { 275 char line[30]; 276 277 snprintf(line, sizeof (line), "W%d\n", count); 278 write(rmtape, line, strlen(line)); 279 write(rmtape, buf, count); 280 return (rmtreply("write")); 281 } 282 283 static int 284 rmtcall(const char *cmd, const char *buf) 285 { 286 ssize_t len = (ssize_t)strlen(buf); 287 288 if (write(rmtape, buf, len) != len) 289 rmtconnaborted(0); 290 return (rmtreply(cmd)); 291 } 292 293 static int 294 rmtreply(const char *cmd) 295 { 296 char *cp; 297 char code[30], emsg[BUFSIZ]; 298 299 rmtgets(code, sizeof (code)); 300 if (*code == 'E' || *code == 'F') { 301 rmtgets(emsg, sizeof (emsg)); 302 msg("%s: %s", cmd, emsg); 303 errno = atoi(code + 1); 304 if (*code == 'F') 305 rmtstate = TS_CLOSED; 306 return (-1); 307 } 308 if (*code != 'A') { 309 /* Kill trailing newline */ 310 cp = code + strlen(code); 311 if (cp > code && *--cp == '\n') 312 *cp = '\0'; 313 314 msg("Protocol to remote tape server botched (code \"%s\").\n", 315 code); 316 rmtconnaborted(0); 317 } 318 return (atoi(code + 1)); 319 } 320 321 int 322 rmtgetb(void) 323 { 324 char c; 325 326 if (read(rmtape, &c, 1) != 1) 327 rmtconnaborted(0); 328 return (c); 329 } 330 331 /* Get a line (guaranteed to have a trailing newline). */ 332 void 333 rmtgets(char *line, int len) 334 { 335 char *cp = line; 336 337 while (len > 1) { 338 *cp = rmtgetb(); 339 if (*cp == '\n') { 340 cp[1] = '\0'; 341 return; 342 } 343 cp++; 344 len--; 345 } 346 *cp = '\0'; 347 msg("Protocol to remote tape server botched.\n"); 348 msg("(rmtgets got \"%s\").\n", line); 349 rmtconnaborted(0); 350 } 351