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 * %sccs.include.redist.c% 14 * 15 * @(#)utils.c 8.2 (Berkeley) 02/22/94 16 * 17 * Utah $Hdr: utils.c 3.1 92/07/06$ 18 * Author: Jeff Forys, University of Utah CSS 19 */ 20 21 #ifndef lint 22 static char sccsid[] = "@(#)utils.c 8.2 (Berkeley) 02/22/94"; 23 #endif /* not lint */ 24 25 #include <sys/param.h> 26 #include <sys/time.h> 27 28 #include <fcntl.h> 29 #include <signal.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <syslog.h> 34 #include <time.h> 35 #include <unistd.h> 36 #include "defs.h" 37 38 /* 39 ** DispPkt -- Display the contents of an RMPCONN packet. 40 ** 41 ** Parameters: 42 ** rconn - packet to be displayed. 43 ** direct - direction packet is going (DIR_*). 44 ** 45 ** Returns: 46 ** Nothing. 47 ** 48 ** Side Effects: 49 ** None. 50 */ 51 void 52 DispPkt(rconn, direct) 53 RMPCONN *rconn; 54 int direct; 55 { 56 static char BootFmt[] = "\t\tRetCode:%u SeqNo:%lx SessID:%x Vers:%u"; 57 static char ReadFmt[] = "\t\tRetCode:%u Offset:%lx SessID:%x\n"; 58 59 struct tm *tmp; 60 register struct rmp_packet *rmp; 61 int i, omask; 62 u_int t; 63 64 /* 65 * Since we will be working with RmpConns as well as DbgFp, we 66 * must block signals that can affect either. 67 */ 68 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGUSR1)|sigmask(SIGUSR2)); 69 70 if (DbgFp == NULL) { /* sanity */ 71 (void) sigsetmask(omask); 72 return; 73 } 74 75 /* display direction packet is going using '>>>' or '<<<' */ 76 fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp); 77 78 /* display packet timestamp */ 79 tmp = localtime((time_t *)&rconn->tstamp.tv_sec); 80 fprintf(DbgFp, "%02d:%02d:%02d.%06ld ", tmp->tm_hour, tmp->tm_min, 81 tmp->tm_sec, rconn->tstamp.tv_usec); 82 83 /* display src or dst addr and information about network interface */ 84 fprintf(DbgFp, "Addr: %s Intf: %s\n", EnetStr(rconn), IntfName); 85 86 rmp = &rconn->rmp; 87 88 /* display IEEE 802.2 Logical Link Control header */ 89 (void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n", 90 rmp->hp_llc.dsap, rmp->hp_llc.ssap, rmp->hp_llc.cntrl); 91 92 /* display HP extensions to 802.2 Logical Link Control header */ 93 (void) fprintf(DbgFp, "\tHP Ext: DXSAP:%x SXSAP:%x\n", 94 rmp->hp_llc.dxsap, rmp->hp_llc.sxsap); 95 96 /* 97 * Display information about RMP packet using type field to 98 * determine what kind of packet this is. 99 */ 100 switch(rmp->r_type) { 101 case RMP_BOOT_REQ: /* boot request */ 102 (void) fprintf(DbgFp, "\tBoot Request:"); 103 GETWORD(rmp->r_brq.rmp_seqno, t); 104 if (rmp->r_brq.rmp_session == RMP_PROBESID) { 105 if (WORDZE(rmp->r_brq.rmp_seqno)) 106 fputs(" (Send Server ID)", DbgFp); 107 else 108 fprintf(DbgFp," (Send Filename #%u)",t); 109 } 110 (void) fputc('\n', DbgFp); 111 (void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode, 112 t, rmp->r_brq.rmp_session, 113 rmp->r_brq.rmp_version); 114 (void) fprintf(DbgFp, "\n\t\tMachine Type: "); 115 for (i = 0; i < RMP_MACHLEN; i++) 116 (void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp); 117 DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm); 118 break; 119 case RMP_BOOT_REPL: /* boot reply */ 120 fprintf(DbgFp, "\tBoot Reply:\n"); 121 GETWORD(rmp->r_brpl.rmp_seqno, t); 122 (void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode, 123 t, rmp->r_brpl.rmp_session, 124 rmp->r_brpl.rmp_version); 125 DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm); 126 break; 127 case RMP_READ_REQ: /* read request */ 128 (void) fprintf(DbgFp, "\tRead Request:\n"); 129 GETWORD(rmp->r_rrq.rmp_offset, t); 130 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode, 131 t, rmp->r_rrq.rmp_session); 132 (void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n", 133 rmp->r_rrq.rmp_size); 134 break; 135 case RMP_READ_REPL: /* read reply */ 136 (void) fprintf(DbgFp, "\tRead Reply:\n"); 137 GETWORD(rmp->r_rrpl.rmp_offset, t); 138 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode, 139 t, rmp->r_rrpl.rmp_session); 140 (void) fprintf(DbgFp, "\t\tNoOfBytesSent: %d\n", 141 rconn->rmplen - RMPREADSIZE(0)); 142 break; 143 case RMP_BOOT_DONE: /* boot complete */ 144 (void) fprintf(DbgFp, "\tBoot Complete:\n"); 145 (void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n", 146 rmp->r_done.rmp_retcode, 147 rmp->r_done.rmp_session); 148 break; 149 default: /* ??? */ 150 (void) fprintf(DbgFp, "\tUnknown Type:(%d)\n", 151 rmp->r_type); 152 } 153 (void) fputc('\n', DbgFp); 154 (void) fflush(DbgFp); 155 156 (void) sigsetmask(omask); /* reset old signal mask */ 157 } 158 159 160 /* 161 ** GetEtherAddr -- convert an RMP (Ethernet) address into a string. 162 ** 163 ** An RMP BOOT packet has been received. Look at the type field 164 ** and process Boot Requests, Read Requests, and Boot Complete 165 ** packets. Any other type will be dropped with a warning msg. 166 ** 167 ** Parameters: 168 ** addr - array of RMP_ADDRLEN bytes. 169 ** 170 ** Returns: 171 ** Pointer to static string representation of `addr'. 172 ** 173 ** Side Effects: 174 ** None. 175 ** 176 ** Warnings: 177 ** - The return value points to a static buffer; it must 178 ** be copied if it's to be saved. 179 ** - For speed, we assume a u_char consists of 8 bits. 180 */ 181 char * 182 GetEtherAddr(addr) 183 u_char *addr; 184 { 185 static char Hex[] = "0123456789abcdef"; 186 static char etherstr[RMP_ADDRLEN*3]; 187 register int i; 188 register char *cp1, *cp2; 189 190 /* 191 * For each byte in `addr', convert it to "<hexchar><hexchar>:". 192 * The last byte does not get a trailing `:' appended. 193 */ 194 i = 0; 195 cp1 = (char *)addr; 196 cp2 = etherstr; 197 for(;;) { 198 *cp2++ = Hex[*cp1 >> 4 & 0xf]; 199 *cp2++ = Hex[*cp1++ & 0xf]; 200 if (++i == RMP_ADDRLEN) 201 break; 202 *cp2++ = ':'; 203 } 204 *cp2 = '\0'; 205 206 return(etherstr); 207 } 208 209 210 /* 211 ** DispFlnm -- Print a string of bytes to DbgFp (often, a file name). 212 ** 213 ** Parameters: 214 ** size - number of bytes to print. 215 ** flnm - address of first byte. 216 ** 217 ** Returns: 218 ** Nothing. 219 ** 220 ** Side Effects: 221 ** - Characters are sent to `DbgFp'. 222 */ 223 void 224 DspFlnm(size, flnm) 225 register u_int size; 226 register char *flnm; 227 { 228 register int i; 229 230 (void) fprintf(DbgFp, "\n\t\tFile Name (%d): <", size); 231 for (i = 0; i < size; i++) 232 (void) fputc(*flnm++, DbgFp); 233 (void) fputs(">\n", DbgFp); 234 } 235 236 237 /* 238 ** NewClient -- allocate memory for a new CLIENT. 239 ** 240 ** Parameters: 241 ** addr - RMP (Ethernet) address of new client. 242 ** 243 ** Returns: 244 ** Ptr to new CLIENT or NULL if we ran out of memory. 245 ** 246 ** Side Effects: 247 ** - Memory will be malloc'd for the new CLIENT. 248 ** - If malloc() fails, a log message will be generated. 249 */ 250 CLIENT * 251 NewClient(addr) 252 u_char *addr; 253 { 254 CLIENT *ctmp; 255 256 if ((ctmp = (CLIENT *) malloc(sizeof(CLIENT))) == NULL) { 257 syslog(LOG_ERR, "NewClient: out of memory (%s)", 258 GetEtherAddr(addr)); 259 return(NULL); 260 } 261 262 bzero(ctmp, sizeof(CLIENT)); 263 bcopy(addr, &ctmp->addr[0], RMP_ADDRLEN); 264 return(ctmp); 265 } 266 267 /* 268 ** FreeClient -- free linked list of Clients. 269 ** 270 ** Parameters: 271 ** None. 272 ** 273 ** Returns: 274 ** Nothing. 275 ** 276 ** Side Effects: 277 ** - All malloc'd memory associated with the linked list of 278 ** CLIENTS will be free'd; `Clients' will be set to NULL. 279 ** 280 ** Warnings: 281 ** - This routine must be called with SIGHUP blocked. 282 */ 283 void 284 FreeClients() 285 { 286 register CLIENT *ctmp; 287 288 while (Clients != NULL) { 289 ctmp = Clients; 290 Clients = Clients->next; 291 FreeClient(ctmp); 292 } 293 } 294 295 /* 296 ** NewStr -- allocate memory for a character array. 297 ** 298 ** Parameters: 299 ** str - null terminated character array. 300 ** 301 ** Returns: 302 ** Ptr to new character array or NULL if we ran out of memory. 303 ** 304 ** Side Effects: 305 ** - Memory will be malloc'd for the new character array. 306 ** - If malloc() fails, a log message will be generated. 307 */ 308 char * 309 NewStr(str) 310 char *str; 311 { 312 char *stmp; 313 314 if ((stmp = (char *)malloc((unsigned) (strlen(str)+1))) == NULL) { 315 syslog(LOG_ERR, "NewStr: out of memory (%s)", str); 316 return(NULL); 317 } 318 319 (void) strcpy(stmp, str); 320 return(stmp); 321 } 322 323 /* 324 ** To save time, NewConn and FreeConn maintain a cache of one RMPCONN 325 ** in `LastFree' (defined below). 326 */ 327 328 static RMPCONN *LastFree = NULL; 329 330 /* 331 ** NewConn -- allocate memory for a new RMPCONN connection. 332 ** 333 ** Parameters: 334 ** rconn - initialization template for new connection. 335 ** 336 ** Returns: 337 ** Ptr to new RMPCONN or NULL if we ran out of memory. 338 ** 339 ** Side Effects: 340 ** - Memory may be malloc'd for the new RMPCONN (if not cached). 341 ** - If malloc() fails, a log message will be generated. 342 */ 343 RMPCONN * 344 NewConn(rconn) 345 RMPCONN *rconn; 346 { 347 RMPCONN *rtmp; 348 349 if (LastFree == NULL) { /* nothing cached; make a new one */ 350 if ((rtmp = (RMPCONN *) malloc(sizeof(RMPCONN))) == NULL) { 351 syslog(LOG_ERR, "NewConn: out of memory (%s)", 352 EnetStr(rconn)); 353 return(NULL); 354 } 355 } else { /* use the cached RMPCONN */ 356 rtmp = LastFree; 357 LastFree = NULL; 358 } 359 360 /* 361 * Copy template into `rtmp', init file descriptor to `-1' and 362 * set ptr to next elem NULL. 363 */ 364 bcopy((char *)rconn, (char *)rtmp, sizeof(RMPCONN)); 365 rtmp->bootfd = -1; 366 rtmp->next = NULL; 367 368 return(rtmp); 369 } 370 371 /* 372 ** FreeConn -- Free memory associated with an RMPCONN connection. 373 ** 374 ** Parameters: 375 ** rtmp - ptr to RMPCONN to be free'd. 376 ** 377 ** Returns: 378 ** Nothing. 379 ** 380 ** Side Effects: 381 ** - Memory associated with `rtmp' may be free'd (or cached). 382 ** - File desc associated with `rtmp->bootfd' will be closed. 383 */ 384 void 385 FreeConn(rtmp) 386 register RMPCONN *rtmp; 387 { 388 /* 389 * If the file descriptor is in use, close the file. 390 */ 391 if (rtmp->bootfd >= 0) { 392 (void) close(rtmp->bootfd); 393 rtmp->bootfd = -1; 394 } 395 396 if (LastFree == NULL) /* cache for next time */ 397 rtmp = LastFree; 398 else /* already one cached; free this one */ 399 free((char *)rtmp); 400 } 401 402 /* 403 ** FreeConns -- free linked list of RMPCONN connections. 404 ** 405 ** Parameters: 406 ** None. 407 ** 408 ** Returns: 409 ** Nothing. 410 ** 411 ** Side Effects: 412 ** - All malloc'd memory associated with the linked list of 413 ** connections will be free'd; `RmpConns' will be set to NULL. 414 ** - If LastFree is != NULL, it too will be free'd & NULL'd. 415 ** 416 ** Warnings: 417 ** - This routine must be called with SIGHUP blocked. 418 */ 419 void 420 FreeConns() 421 { 422 register RMPCONN *rtmp; 423 424 while (RmpConns != NULL) { 425 rtmp = RmpConns; 426 RmpConns = RmpConns->next; 427 FreeConn(rtmp); 428 } 429 430 if (LastFree != NULL) { 431 free((char *)LastFree); 432 LastFree = NULL; 433 } 434 } 435 436 /* 437 ** AddConn -- Add a connection to the linked list of connections. 438 ** 439 ** Parameters: 440 ** rconn - connection to be added. 441 ** 442 ** Returns: 443 ** Nothing. 444 ** 445 ** Side Effects: 446 ** - RmpConn will point to new connection. 447 ** 448 ** Warnings: 449 ** - This routine must be called with SIGHUP blocked. 450 */ 451 void 452 AddConn(rconn) 453 register RMPCONN *rconn; 454 { 455 if (RmpConns != NULL) 456 rconn->next = RmpConns; 457 RmpConns = rconn; 458 } 459 460 /* 461 ** FindConn -- Find a connection in the linked list of connections. 462 ** 463 ** We use the RMP (Ethernet) address as the basis for determining 464 ** if this is the same connection. According to the Remote Maint 465 ** Protocol, we can only have one connection with any machine. 466 ** 467 ** Parameters: 468 ** rconn - connection to be found. 469 ** 470 ** Returns: 471 ** Matching connection from linked list or NULL if not found. 472 ** 473 ** Side Effects: 474 ** None. 475 ** 476 ** Warnings: 477 ** - This routine must be called with SIGHUP blocked. 478 */ 479 RMPCONN * 480 FindConn(rconn) 481 register RMPCONN *rconn; 482 { 483 register RMPCONN *rtmp; 484 485 for (rtmp = RmpConns; rtmp != NULL; rtmp = rtmp->next) 486 if (bcmp((char *)&rconn->rmp.hp_hdr.saddr[0], 487 (char *)&rtmp->rmp.hp_hdr.saddr[0], RMP_ADDRLEN) == 0) 488 break; 489 490 return(rtmp); 491 } 492 493 /* 494 ** RemoveConn -- Remove a connection from the linked list of connections. 495 ** 496 ** Parameters: 497 ** rconn - connection to be removed. 498 ** 499 ** Returns: 500 ** Nothing. 501 ** 502 ** Side Effects: 503 ** - If found, an RMPCONN will cease to exist and it will 504 ** be removed from the linked list. 505 ** 506 ** Warnings: 507 ** - This routine must be called with SIGHUP blocked. 508 */ 509 void 510 RemoveConn(rconn) 511 register RMPCONN *rconn; 512 { 513 register RMPCONN *thisrconn, *lastrconn; 514 515 if (RmpConns == rconn) { /* easy case */ 516 RmpConns = RmpConns->next; 517 FreeConn(rconn); 518 } else { /* must traverse linked list */ 519 lastrconn = RmpConns; /* set back ptr */ 520 thisrconn = lastrconn->next; /* set current ptr */ 521 while (thisrconn != NULL) { 522 if (rconn == thisrconn) { /* found it */ 523 lastrconn->next = thisrconn->next; 524 FreeConn(thisrconn); 525 break; 526 } 527 lastrconn = thisrconn; 528 thisrconn = thisrconn->next; 529 } 530 } 531 } 532