1 /* 2 * Copyright (c) 1988, 1992 The University of Utah and the Center 3 * for Software Science (CSS). 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Center for Software Science of the University of Utah Computer 9 * Science Department. CSS requests users of this software to return 10 * to css-dist@cs.utah.edu any improvements that they make and grant 11 * CSS redistribution rights. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: @(#)utils.c 8.1 (Berkeley) 6/4/93 42 * 43 * From: Utah Hdr: utils.c 3.1 92/07/06 44 * Author: Jeff Forys, University of Utah CSS 45 */ 46 47 #ifndef lint 48 #if 0 49 static const char sccsid[] = "@(#)utils.c 8.1 (Berkeley) 6/4/93"; 50 #endif 51 static const char rcsid[] = 52 "$FreeBSD$"; 53 #endif /* not lint */ 54 55 #include <sys/param.h> 56 #include <sys/time.h> 57 #include <netinet/in.h> 58 59 #include <fcntl.h> 60 #include <signal.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <syslog.h> 65 #include <time.h> 66 #include <unistd.h> 67 #include "defs.h" 68 69 /* 70 ** DispPkt -- Display the contents of an RMPCONN packet. 71 ** 72 ** Parameters: 73 ** rconn - packet to be displayed. 74 ** direct - direction packet is going (DIR_*). 75 ** 76 ** Returns: 77 ** Nothing. 78 ** 79 ** Side Effects: 80 ** None. 81 */ 82 void 83 DispPkt(RMPCONN *rconn, int direct) 84 { 85 static const char BootFmt[] = "\t\tRetCode:%u SeqNo:%x SessID:%x Vers:%u"; 86 static const char ReadFmt[] = "\t\tRetCode:%u Offset:%x SessID:%x\n"; 87 88 struct tm *tmp; 89 struct rmp_packet *rmp; 90 int i, omask; 91 u_int32_t t; 92 93 /* 94 * Since we will be working with RmpConns as well as DbgFp, we 95 * must block signals that can affect either. 96 */ 97 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGUSR1)|sigmask(SIGUSR2)); 98 99 if (DbgFp == NULL) { /* sanity */ 100 (void) sigsetmask(omask); 101 return; 102 } 103 104 /* display direction packet is going using '>>>' or '<<<' */ 105 fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp); 106 107 /* display packet timestamp */ 108 tmp = localtime((time_t *)&rconn->tstamp.tv_sec); 109 fprintf(DbgFp, "%02d:%02d:%02d.%06ld ", tmp->tm_hour, tmp->tm_min, 110 tmp->tm_sec, rconn->tstamp.tv_usec); 111 112 /* display src or dst addr and information about network interface */ 113 fprintf(DbgFp, "Addr: %s Intf: %s\n", EnetStr(rconn), IntfName); 114 115 rmp = &rconn->rmp; 116 117 /* display IEEE 802.2 Logical Link Control header */ 118 (void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n", 119 rmp->hp_llc.dsap, rmp->hp_llc.ssap, ntohs(rmp->hp_llc.cntrl)); 120 121 /* display HP extensions to 802.2 Logical Link Control header */ 122 (void) fprintf(DbgFp, "\tHP Ext: DXSAP:%x SXSAP:%x\n", 123 ntohs(rmp->hp_llc.dxsap), ntohs(rmp->hp_llc.sxsap)); 124 125 /* 126 * Display information about RMP packet using type field to 127 * determine what kind of packet this is. 128 */ 129 switch(rmp->r_type) { 130 case RMP_BOOT_REQ: /* boot request */ 131 (void) fprintf(DbgFp, "\tBoot Request:"); 132 GETWORD(rmp->r_brq.rmp_seqno, t); 133 if (ntohs(rmp->r_brq.rmp_session) == RMP_PROBESID) { 134 if (WORDZE(rmp->r_brq.rmp_seqno)) 135 fputs(" (Send Server ID)", DbgFp); 136 else 137 fprintf(DbgFp," (Send Filename #%u)",t); 138 } 139 (void) fputc('\n', DbgFp); 140 (void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode, 141 t, ntohs(rmp->r_brq.rmp_session), 142 ntohs(rmp->r_brq.rmp_version)); 143 (void) fprintf(DbgFp, "\n\t\tMachine Type: "); 144 for (i = 0; i < RMP_MACHLEN; i++) 145 (void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp); 146 DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm); 147 break; 148 case RMP_BOOT_REPL: /* boot reply */ 149 fprintf(DbgFp, "\tBoot Reply:\n"); 150 GETWORD(rmp->r_brpl.rmp_seqno, t); 151 (void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode, 152 t, ntohs(rmp->r_brpl.rmp_session), 153 ntohs(rmp->r_brpl.rmp_version)); 154 DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm); 155 break; 156 case RMP_READ_REQ: /* read request */ 157 (void) fprintf(DbgFp, "\tRead Request:\n"); 158 GETWORD(rmp->r_rrq.rmp_offset, t); 159 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode, 160 t, ntohs(rmp->r_rrq.rmp_session)); 161 (void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n", 162 ntohs(rmp->r_rrq.rmp_size)); 163 break; 164 case RMP_READ_REPL: /* read reply */ 165 (void) fprintf(DbgFp, "\tRead Reply:\n"); 166 GETWORD(rmp->r_rrpl.rmp_offset, t); 167 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode, 168 t, ntohs(rmp->r_rrpl.rmp_session)); 169 (void) fprintf(DbgFp, "\t\tNoOfBytesSent: %zu\n", 170 rconn->rmplen - RMPREADSIZE(0)); 171 break; 172 case RMP_BOOT_DONE: /* boot complete */ 173 (void) fprintf(DbgFp, "\tBoot Complete:\n"); 174 (void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n", 175 rmp->r_done.rmp_retcode, 176 ntohs(rmp->r_done.rmp_session)); 177 break; 178 default: /* ??? */ 179 (void) fprintf(DbgFp, "\tUnknown Type:(%d)\n", 180 rmp->r_type); 181 } 182 (void) fputc('\n', DbgFp); 183 (void) fflush(DbgFp); 184 185 (void) sigsetmask(omask); /* reset old signal mask */ 186 } 187 188 189 /* 190 ** GetEtherAddr -- convert an RMP (Ethernet) address into a string. 191 ** 192 ** An RMP BOOT packet has been received. Look at the type field 193 ** and process Boot Requests, Read Requests, and Boot Complete 194 ** packets. Any other type will be dropped with a warning msg. 195 ** 196 ** Parameters: 197 ** addr - array of RMP_ADDRLEN bytes. 198 ** 199 ** Returns: 200 ** Pointer to static string representation of `addr'. 201 ** 202 ** Side Effects: 203 ** None. 204 ** 205 ** Warnings: 206 ** - The return value points to a static buffer; it must 207 ** be copied if it's to be saved. 208 */ 209 char * 210 GetEtherAddr(u_int8_t *addr) 211 { 212 static char Hex[] = "0123456789abcdef"; 213 static char etherstr[RMP_ADDRLEN*3]; 214 int i; 215 char *cp; 216 217 /* 218 * For each byte in `addr', convert it to "<hexchar><hexchar>:". 219 * The last byte does not get a trailing `:' appended. 220 */ 221 i = 0; 222 cp = etherstr; 223 for(;;) { 224 *cp++ = Hex[*addr >> 4 & 0xf]; 225 *cp++ = Hex[*addr++ & 0xf]; 226 if (++i == RMP_ADDRLEN) 227 break; 228 *cp++ = ':'; 229 } 230 *cp = '\0'; 231 232 return(etherstr); 233 } 234 235 236 /* 237 ** DispFlnm -- Print a string of bytes to DbgFp (often, a file name). 238 ** 239 ** Parameters: 240 ** size - number of bytes to print. 241 ** flnm - address of first byte. 242 ** 243 ** Returns: 244 ** Nothing. 245 ** 246 ** Side Effects: 247 ** - Characters are sent to `DbgFp'. 248 */ 249 void 250 DspFlnm(u_int size, char *flnm) 251 { 252 int i; 253 254 (void) fprintf(DbgFp, "\n\t\tFile Name (%u): <", size); 255 for (i = 0; i < size; i++) 256 (void) fputc(*flnm++, DbgFp); 257 (void) fputs(">\n", DbgFp); 258 } 259 260 261 /* 262 ** NewClient -- allocate memory for a new CLIENT. 263 ** 264 ** Parameters: 265 ** addr - RMP (Ethernet) address of new client. 266 ** 267 ** Returns: 268 ** Ptr to new CLIENT or NULL if we ran out of memory. 269 ** 270 ** Side Effects: 271 ** - Memory will be malloc'd for the new CLIENT. 272 ** - If malloc() fails, a log message will be generated. 273 */ 274 CLIENT * 275 NewClient(u_int8_t *addr) 276 { 277 CLIENT *ctmp; 278 279 if ((ctmp = (CLIENT *) malloc(sizeof(CLIENT))) == NULL) { 280 syslog(LOG_ERR, "NewClient: out of memory (%s)", 281 GetEtherAddr(addr)); 282 return(NULL); 283 } 284 285 memset(ctmp, 0, sizeof(CLIENT)); 286 memmove(&ctmp->addr[0], addr, RMP_ADDRLEN); 287 return(ctmp); 288 } 289 290 /* 291 ** FreeClient -- free linked list of Clients. 292 ** 293 ** Parameters: 294 ** None. 295 ** 296 ** Returns: 297 ** Nothing. 298 ** 299 ** Side Effects: 300 ** - All malloc'd memory associated with the linked list of 301 ** CLIENTS will be free'd; `Clients' will be set to NULL. 302 ** 303 ** Warnings: 304 ** - This routine must be called with SIGHUP blocked. 305 */ 306 void 307 FreeClients(void) 308 { 309 CLIENT *ctmp; 310 311 while (Clients != NULL) { 312 ctmp = Clients; 313 Clients = Clients->next; 314 FreeClient(ctmp); 315 } 316 } 317 318 /* 319 ** NewStr -- allocate memory for a character array. 320 ** 321 ** Parameters: 322 ** str - null terminated character array. 323 ** 324 ** Returns: 325 ** Ptr to new character array or NULL if we ran out of memory. 326 ** 327 ** Side Effects: 328 ** - Memory will be malloc'd for the new character array. 329 ** - If malloc() fails, a log message will be generated. 330 */ 331 char * 332 NewStr(char *str) 333 { 334 char *stmp; 335 336 if ((stmp = (char *)malloc((unsigned) (strlen(str)+1))) == NULL) { 337 syslog(LOG_ERR, "NewStr: out of memory (%s)", str); 338 return(NULL); 339 } 340 341 (void) strcpy(stmp, str); 342 return(stmp); 343 } 344 345 /* 346 ** To save time, NewConn and FreeConn maintain a cache of one RMPCONN 347 ** in `LastFree' (defined below). 348 */ 349 350 static RMPCONN *LastFree = NULL; 351 352 /* 353 ** NewConn -- allocate memory for a new RMPCONN connection. 354 ** 355 ** Parameters: 356 ** rconn - initialization template for new connection. 357 ** 358 ** Returns: 359 ** Ptr to new RMPCONN or NULL if we ran out of memory. 360 ** 361 ** Side Effects: 362 ** - Memory may be malloc'd for the new RMPCONN (if not cached). 363 ** - If malloc() fails, a log message will be generated. 364 */ 365 RMPCONN * 366 NewConn(RMPCONN *rconn) 367 { 368 RMPCONN *rtmp; 369 370 if (LastFree == NULL) { /* nothing cached; make a new one */ 371 if ((rtmp = (RMPCONN *) malloc(sizeof(RMPCONN))) == NULL) { 372 syslog(LOG_ERR, "NewConn: out of memory (%s)", 373 EnetStr(rconn)); 374 return(NULL); 375 } 376 } else { /* use the cached RMPCONN */ 377 rtmp = LastFree; 378 LastFree = NULL; 379 } 380 381 /* 382 * Copy template into `rtmp', init file descriptor to `-1' and 383 * set ptr to next elem NULL. 384 */ 385 memmove((char *)rtmp, (char *)rconn, sizeof(RMPCONN)); 386 rtmp->bootfd = -1; 387 rtmp->next = NULL; 388 389 return(rtmp); 390 } 391 392 /* 393 ** FreeConn -- Free memory associated with an RMPCONN connection. 394 ** 395 ** Parameters: 396 ** rtmp - ptr to RMPCONN to be free'd. 397 ** 398 ** Returns: 399 ** Nothing. 400 ** 401 ** Side Effects: 402 ** - Memory associated with `rtmp' may be free'd (or cached). 403 ** - File desc associated with `rtmp->bootfd' will be closed. 404 */ 405 void 406 FreeConn(RMPCONN *rtmp) 407 { 408 /* 409 * If the file descriptor is in use, close the file. 410 */ 411 if (rtmp->bootfd >= 0) { 412 (void) close(rtmp->bootfd); 413 rtmp->bootfd = -1; 414 } 415 416 if (LastFree == NULL) /* cache for next time */ 417 rtmp = LastFree; 418 else /* already one cached; free this one */ 419 free((char *)rtmp); 420 } 421 422 /* 423 ** FreeConns -- free linked list of RMPCONN connections. 424 ** 425 ** Parameters: 426 ** None. 427 ** 428 ** Returns: 429 ** Nothing. 430 ** 431 ** Side Effects: 432 ** - All malloc'd memory associated with the linked list of 433 ** connections will be free'd; `RmpConns' will be set to NULL. 434 ** - If LastFree is != NULL, it too will be free'd & NULL'd. 435 ** 436 ** Warnings: 437 ** - This routine must be called with SIGHUP blocked. 438 */ 439 void 440 FreeConns(void) 441 { 442 RMPCONN *rtmp; 443 444 while (RmpConns != NULL) { 445 rtmp = RmpConns; 446 RmpConns = RmpConns->next; 447 FreeConn(rtmp); 448 } 449 450 if (LastFree != NULL) { 451 free((char *)LastFree); 452 LastFree = NULL; 453 } 454 } 455 456 /* 457 ** AddConn -- Add a connection to the linked list of connections. 458 ** 459 ** Parameters: 460 ** rconn - connection to be added. 461 ** 462 ** Returns: 463 ** Nothing. 464 ** 465 ** Side Effects: 466 ** - RmpConn will point to new connection. 467 ** 468 ** Warnings: 469 ** - This routine must be called with SIGHUP blocked. 470 */ 471 void 472 AddConn(RMPCONN *rconn) 473 { 474 if (RmpConns != NULL) 475 rconn->next = RmpConns; 476 RmpConns = rconn; 477 } 478 479 /* 480 ** FindConn -- Find a connection in the linked list of connections. 481 ** 482 ** We use the RMP (Ethernet) address as the basis for determining 483 ** if this is the same connection. According to the Remote Maint 484 ** Protocol, we can only have one connection with any machine. 485 ** 486 ** Parameters: 487 ** rconn - connection to be found. 488 ** 489 ** Returns: 490 ** Matching connection from linked list or NULL if not found. 491 ** 492 ** Side Effects: 493 ** None. 494 ** 495 ** Warnings: 496 ** - This routine must be called with SIGHUP blocked. 497 */ 498 RMPCONN * 499 FindConn(RMPCONN *rconn) 500 { 501 RMPCONN *rtmp; 502 503 for (rtmp = RmpConns; rtmp != NULL; rtmp = rtmp->next) 504 if (bcmp((char *)&rconn->rmp.hp_hdr.saddr[0], 505 (char *)&rtmp->rmp.hp_hdr.saddr[0], RMP_ADDRLEN) == 0) 506 break; 507 508 return(rtmp); 509 } 510 511 /* 512 ** RemoveConn -- Remove a connection from the linked list of connections. 513 ** 514 ** Parameters: 515 ** rconn - connection to be removed. 516 ** 517 ** Returns: 518 ** Nothing. 519 ** 520 ** Side Effects: 521 ** - If found, an RMPCONN will cease to exist and it will 522 ** be removed from the linked list. 523 ** 524 ** Warnings: 525 ** - This routine must be called with SIGHUP blocked. 526 */ 527 void 528 RemoveConn(RMPCONN *rconn) 529 { 530 RMPCONN *thisrconn, *lastrconn; 531 532 if (RmpConns == rconn) { /* easy case */ 533 RmpConns = RmpConns->next; 534 FreeConn(rconn); 535 } else { /* must traverse linked list */ 536 lastrconn = RmpConns; /* set back ptr */ 537 thisrconn = lastrconn->next; /* set current ptr */ 538 while (thisrconn != NULL) { 539 if (rconn == thisrconn) { /* found it */ 540 lastrconn->next = thisrconn->next; 541 FreeConn(thisrconn); 542 break; 543 } 544 lastrconn = thisrconn; 545 thisrconn = thisrconn->next; 546 } 547 } 548 } 549