1 /* 2 * Copyright (c) 1992 Regents of the University of California. 3 * Copyright (c) 1988, 1992 The University of Utah and the Center 4 * for Software Science (CSS). 5 * 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 5.1 (Berkeley) 07/23/92 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 5.1 (Berkeley) 07/23/92"; 23 #endif /* not lint */ 24 25 #include "defs.h" 26 27 #include <sys/file.h> 28 29 #include <syslog.h> 30 #include <strings.h> 31 32 33 /* 34 ** DispPkt -- Display the contents of an RMPCONN packet. 35 ** 36 ** Parameters: 37 ** rconn - packet to be displayed. 38 ** direct - direction packet is going (DIR_*). 39 ** 40 ** Returns: 41 ** Nothing. 42 ** 43 ** Side Effects: 44 ** None. 45 */ 46 47 DispPkt(rconn, direct) 48 RMPCONN *rconn; 49 int direct; 50 { 51 static char BootFmt[] = "\t\tRetCode:%u SeqNo:%lx SessID:%x Vers:%u"; 52 static char ReadFmt[] = "\t\tRetCode:%u Offset:%lx SessID:%x\n"; 53 54 struct tm *tmp; 55 register struct rmp_packet *rmp; 56 int i, omask; 57 u_int t; 58 59 /* 60 * Since we will be working with RmpConns as well as DbgFp, we 61 * must block signals that can affect either. 62 */ 63 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGUSR1)|sigmask(SIGUSR2)); 64 65 if (DbgFp == NULL) { /* sanity */ 66 (void) sigsetmask(omask); 67 return; 68 } 69 70 /* display direction packet is going using '>>>' or '<<<' */ 71 fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp); 72 73 /* display packet timestamp */ 74 tmp = localtime((time_t *)&rconn->tstamp.tv_sec); 75 fprintf(DbgFp, "%02d:%02d:%02d.%06ld ", tmp->tm_hour, tmp->tm_min, 76 tmp->tm_sec, rconn->tstamp.tv_usec); 77 78 /* display src or dst addr and information about network interface */ 79 fprintf(DbgFp, "Addr: %s Intf: %s\n", EnetStr(rconn), IntfName); 80 81 rmp = &rconn->rmp; 82 83 /* display IEEE 802.2 Logical Link Control header */ 84 (void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n", 85 rmp->hp_llc.dsap, rmp->hp_llc.ssap, rmp->hp_llc.cntrl); 86 87 /* display HP extensions to 802.2 Logical Link Control header */ 88 (void) fprintf(DbgFp, "\tHP Ext: DXSAP:%x SXSAP:%x\n", 89 rmp->hp_llc.dxsap, rmp->hp_llc.sxsap); 90 91 /* 92 * Display information about RMP packet using type field to 93 * determine what kind of packet this is. 94 */ 95 switch(rmp->r_type) { 96 case RMP_BOOT_REQ: /* boot request */ 97 (void) fprintf(DbgFp, "\tBoot Request:"); 98 GETWORD(rmp->r_brq.rmp_seqno, t); 99 if (rmp->r_brq.rmp_session == RMP_PROBESID) { 100 if (WORDZE(rmp->r_brq.rmp_seqno)) 101 fputs(" (Send Server ID)", DbgFp); 102 else 103 fprintf(DbgFp," (Send Filename #%u)",t); 104 } 105 (void) fputc('\n', DbgFp); 106 (void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode, 107 t, rmp->r_brq.rmp_session, 108 rmp->r_brq.rmp_version); 109 (void) fprintf(DbgFp, "\n\t\tMachine Type: "); 110 for (i = 0; i < RMP_MACHLEN; i++) 111 (void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp); 112 DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm); 113 break; 114 case RMP_BOOT_REPL: /* boot reply */ 115 fprintf(DbgFp, "\tBoot Reply:\n"); 116 GETWORD(rmp->r_brpl.rmp_seqno, t); 117 (void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode, 118 t, rmp->r_brpl.rmp_session, 119 rmp->r_brpl.rmp_version); 120 DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm); 121 break; 122 case RMP_READ_REQ: /* read request */ 123 (void) fprintf(DbgFp, "\tRead Request:\n"); 124 GETWORD(rmp->r_rrq.rmp_offset, t); 125 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode, 126 t, rmp->r_rrq.rmp_session); 127 (void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n", 128 rmp->r_rrq.rmp_size); 129 break; 130 case RMP_READ_REPL: /* read reply */ 131 (void) fprintf(DbgFp, "\tRead Reply:\n"); 132 GETWORD(rmp->r_rrpl.rmp_offset, t); 133 (void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode, 134 t, rmp->r_rrpl.rmp_session); 135 (void) fprintf(DbgFp, "\t\tNoOfBytesSent: %d\n", 136 rconn->rmplen - RMPREADSIZE(0)); 137 break; 138 case RMP_BOOT_DONE: /* boot complete */ 139 (void) fprintf(DbgFp, "\tBoot Complete:\n"); 140 (void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n", 141 rmp->r_done.rmp_retcode, 142 rmp->r_done.rmp_session); 143 break; 144 default: /* ??? */ 145 (void) fprintf(DbgFp, "\tUnknown Type:(%d)\n", 146 rmp->r_type); 147 } 148 (void) fputc('\n', DbgFp); 149 (void) fflush(DbgFp); 150 151 (void) sigsetmask(omask); /* reset old signal mask */ 152 } 153 154 155 /* 156 ** GetEtherAddr -- convert an RMP (Ethernet) address into a string. 157 ** 158 ** An RMP BOOT packet has been received. Look at the type field 159 ** and process Boot Requests, Read Requests, and Boot Complete 160 ** packets. Any other type will be dropped with a warning msg. 161 ** 162 ** Parameters: 163 ** addr - array of RMP_ADDRLEN bytes. 164 ** 165 ** Returns: 166 ** Pointer to static string representation of `addr'. 167 ** 168 ** Side Effects: 169 ** None. 170 ** 171 ** Warnings: 172 ** - The return value points to a static buffer; it must 173 ** be copied if it's to be saved. 174 ** - For speed, we assume a u_char consists of 8 bits. 175 */ 176 177 char * 178 GetEtherAddr(addr) 179 u_char *addr; 180 { 181 static char Hex[] = "0123456789abcdef"; 182 static char etherstr[RMP_ADDRLEN*3]; 183 register int i; 184 register char *cp1, *cp2; 185 186 /* 187 * For each byte in `addr', convert it to "<hexchar><hexchar>:". 188 * The last byte does not get a trailing `:' appended. 189 */ 190 i = 0; 191 cp1 = (char *)addr; 192 cp2 = etherstr; 193 for(;;) { 194 *cp2++ = Hex[*cp1 >> 4 & 0xf]; 195 *cp2++ = Hex[*cp1++ & 0xf]; 196 if (++i == RMP_ADDRLEN) 197 break; 198 *cp2++ = ':'; 199 } 200 *cp2 = '\0'; 201 202 return(etherstr); 203 } 204 205 206 /* 207 ** DispFlnm -- Print a string of bytes to DbgFp (often, a file name). 208 ** 209 ** Parameters: 210 ** size - number of bytes to print. 211 ** flnm - address of first byte. 212 ** 213 ** Returns: 214 ** Nothing. 215 ** 216 ** Side Effects: 217 ** - Characters are sent to `DbgFp'. 218 */ 219 220 DspFlnm(size, flnm) 221 register u_char size; 222 register char *flnm; 223 { 224 register int i; 225 226 (void) fprintf(DbgFp, "\n\t\tFile Name (%d): <", size); 227 for (i = 0; i < size; i++) 228 (void) fputc(*flnm++, DbgFp); 229 (void) fputs(">\n", DbgFp); 230 } 231 232 233 /* 234 ** NewClient -- allocate memory for a new CLIENT. 235 ** 236 ** Parameters: 237 ** addr - RMP (Ethernet) address of new client. 238 ** 239 ** Returns: 240 ** Ptr to new CLIENT or NULL if we ran out of memory. 241 ** 242 ** Side Effects: 243 ** - Memory will be malloc'd for the new CLIENT. 244 ** - If malloc() fails, a log message will be generated. 245 */ 246 247 CLIENT * 248 NewClient(addr) 249 u_char *addr; 250 { 251 CLIENT *ctmp; 252 253 if ((ctmp = (CLIENT *) malloc(sizeof(CLIENT))) == NULL) { 254 syslog(LOG_ERR, "NewClient: out of memory (%s)", 255 GetEtherAddr(addr)); 256 return(NULL); 257 } 258 259 bzero((char *)ctmp, sizeof(CLIENT)); 260 bcopy((char *)addr, (char *)&ctmp->addr[0], RMP_ADDRLEN); 261 return(ctmp); 262 } 263 264 /* 265 ** FreeClient -- free linked list of Clients. 266 ** 267 ** Parameters: 268 ** None. 269 ** 270 ** Returns: 271 ** Nothing. 272 ** 273 ** Side Effects: 274 ** - All malloc'd memory associated with the linked list of 275 ** CLIENTS will be free'd; `Clients' will be set to NULL. 276 ** 277 ** Warnings: 278 ** - This routine must be called with SIGHUP blocked. 279 */ 280 281 FreeClients() 282 { 283 register CLIENT *ctmp; 284 285 while (Clients != NULL) { 286 ctmp = Clients; 287 Clients = Clients->next; 288 FreeClient(ctmp); 289 } 290 } 291 292 /* 293 ** NewStr -- allocate memory for a character array. 294 ** 295 ** Parameters: 296 ** str - null terminated character array. 297 ** 298 ** Returns: 299 ** Ptr to new character array or NULL if we ran out of memory. 300 ** 301 ** Side Effects: 302 ** - Memory will be malloc'd for the new character array. 303 ** - If malloc() fails, a log message will be generated. 304 */ 305 306 char * 307 NewStr(str) 308 char *str; 309 { 310 char *stmp; 311 312 if ((stmp = (char *)malloc((unsigned) (strlen(str)+1))) == NULL) { 313 syslog(LOG_ERR, "NewStr: out of memory (%s)", str); 314 return(NULL); 315 } 316 317 (void) strcpy(stmp, str); 318 return(stmp); 319 } 320 321 /* 322 ** To save time, NewConn and FreeConn maintain a cache of one RMPCONN 323 ** in `LastFree' (defined below). 324 */ 325 326 static RMPCONN *LastFree = NULL; 327 328 /* 329 ** NewConn -- allocate memory for a new RMPCONN connection. 330 ** 331 ** Parameters: 332 ** rconn - initialization template for new connection. 333 ** 334 ** Returns: 335 ** Ptr to new RMPCONN or NULL if we ran out of memory. 336 ** 337 ** Side Effects: 338 ** - Memory may be malloc'd for the new RMPCONN (if not cached). 339 ** - If malloc() fails, a log message will be generated. 340 */ 341 342 RMPCONN * 343 NewConn(rconn) 344 RMPCONN *rconn; 345 { 346 RMPCONN *rtmp; 347 348 if (LastFree == NULL) { /* nothing cached; make a new one */ 349 if ((rtmp = (RMPCONN *) malloc(sizeof(RMPCONN))) == NULL) { 350 syslog(LOG_ERR, "NewConn: out of memory (%s)", 351 EnetStr(rconn)); 352 return(NULL); 353 } 354 } else { /* use the cached RMPCONN */ 355 rtmp = LastFree; 356 LastFree = NULL; 357 } 358 359 /* 360 * Copy template into `rtmp', init file descriptor to `-1' and 361 * set ptr to next elem NULL. 362 */ 363 bcopy((char *)rconn, (char *)rtmp, sizeof(RMPCONN)); 364 rtmp->bootfd = -1; 365 rtmp->next = NULL; 366 367 return(rtmp); 368 } 369 370 /* 371 ** FreeConn -- Free memory associated with an RMPCONN connection. 372 ** 373 ** Parameters: 374 ** rtmp - ptr to RMPCONN to be free'd. 375 ** 376 ** Returns: 377 ** Nothing. 378 ** 379 ** Side Effects: 380 ** - Memory associated with `rtmp' may be free'd (or cached). 381 ** - File desc associated with `rtmp->bootfd' will be closed. 382 */ 383 384 FreeConn(rtmp) 385 register RMPCONN *rtmp; 386 { 387 /* 388 * If the file descriptor is in use, close the file. 389 */ 390 if (rtmp->bootfd >= 0) { 391 (void) close(rtmp->bootfd); 392 rtmp->bootfd = -1; 393 } 394 395 if (LastFree == NULL) /* cache for next time */ 396 rtmp = LastFree; 397 else /* already one cached; free this one */ 398 free((char *)rtmp); 399 } 400 401 /* 402 ** FreeConns -- free linked list of RMPCONN connections. 403 ** 404 ** Parameters: 405 ** None. 406 ** 407 ** Returns: 408 ** Nothing. 409 ** 410 ** Side Effects: 411 ** - All malloc'd memory associated with the linked list of 412 ** connections will be free'd; `RmpConns' will be set to NULL. 413 ** - If LastFree is != NULL, it too will be free'd & NULL'd. 414 ** 415 ** Warnings: 416 ** - This routine must be called with SIGHUP blocked. 417 */ 418 419 FreeConns() 420 { 421 register RMPCONN *rtmp; 422 423 while (RmpConns != NULL) { 424 rtmp = RmpConns; 425 RmpConns = RmpConns->next; 426 FreeConn(rtmp); 427 } 428 429 if (LastFree != NULL) { 430 free((char *)LastFree); 431 LastFree = NULL; 432 } 433 } 434 435 /* 436 ** AddConn -- Add a connection to the linked list of connections. 437 ** 438 ** Parameters: 439 ** rconn - connection to be added. 440 ** 441 ** Returns: 442 ** Nothing. 443 ** 444 ** Side Effects: 445 ** - RmpConn will point to new connection. 446 ** 447 ** Warnings: 448 ** - This routine must be called with SIGHUP blocked. 449 */ 450 451 AddConn(rconn) 452 register RMPCONN *rconn; 453 { 454 if (RmpConns != NULL) 455 rconn->next = RmpConns; 456 RmpConns = rconn; 457 } 458 459 /* 460 ** FindConn -- Find a connection in the linked list of connections. 461 ** 462 ** We use the RMP (Ethernet) address as the basis for determining 463 ** if this is the same connection. According to the Remote Maint 464 ** Protocol, we can only have one connection with any machine. 465 ** 466 ** Parameters: 467 ** rconn - connection to be found. 468 ** 469 ** Returns: 470 ** Matching connection from linked list or NULL if not found. 471 ** 472 ** Side Effects: 473 ** None. 474 ** 475 ** Warnings: 476 ** - This routine must be called with SIGHUP blocked. 477 */ 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 */ 509 510 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