1939f5b94Sdist /* 20942ea6aSbostic * Copyright (c) 1983 Eric P. Allman 3c9d2fa25Sbostic * Copyright (c) 1988, 1993 4c9d2fa25Sbostic * The Regents of the University of California. All rights reserved. 5da1c6175Sbostic * 63bc94712Sbostic * %sccs.include.redist.c% 7939f5b94Sdist */ 8939f5b94Sdist 97aa493c5Seric #include <errno.h> 106c05f684Sbostic #include "sendmail.h" 117fa39d90Seric 12af5e902cSeric #ifndef lint 13da1c6175Sbostic #ifdef DAEMON 14*482e28bcSeric static char sccsid[] = "@(#)daemon.c 8.79 (Berkeley) 04/11/95 (with daemon mode)"; 15d0a9e852Seric #else 16*482e28bcSeric static char sccsid[] = "@(#)daemon.c 8.79 (Berkeley) 04/11/95 (without daemon mode)"; 17da1c6175Sbostic #endif 18da1c6175Sbostic #endif /* not lint */ 19da1c6175Sbostic 20da1c6175Sbostic #ifdef DAEMON 21d0a9e852Seric 22d8d0a4aeSeric # include <arpa/inet.h> 23d0a9e852Seric 249d4a8008Seric #if NAMED_BIND 253490b9dfSeric # include <resolv.h> 263490b9dfSeric #endif 273490b9dfSeric 287fa39d90Seric /* 297fa39d90Seric ** DAEMON.C -- routines to use when running as a daemon. 3047b12ae1Seric ** 3147b12ae1Seric ** This entire file is highly dependent on the 4.2 BSD 3247b12ae1Seric ** interprocess communication primitives. No attempt has 3347b12ae1Seric ** been made to make this file portable to Version 7, 3447b12ae1Seric ** Version 6, MPX files, etc. If you should try such a 3547b12ae1Seric ** thing yourself, I recommend chucking the entire file 3647b12ae1Seric ** and starting from scratch. Basic semantics are: 3747b12ae1Seric ** 3847b12ae1Seric ** getrequests() 3947b12ae1Seric ** Opens a port and initiates a connection. 4047b12ae1Seric ** Returns in a child. Must set InChannel and 4147b12ae1Seric ** OutChannel appropriately. 42b7d7afcbSeric ** clrdaemon() 43b7d7afcbSeric ** Close any open files associated with getting 44b7d7afcbSeric ** the connection; this is used when running the queue, 45b7d7afcbSeric ** etc., to avoid having extra file descriptors during 46b7d7afcbSeric ** the queue run and to avoid confusing the network 47b7d7afcbSeric ** code (if it cares). 48914346b1Seric ** makeconnection(host, port, outfile, infile, usesecureport) 4947b12ae1Seric ** Make a connection to the named host on the given 5047b12ae1Seric ** port. Set *outfile and *infile to the files 5147b12ae1Seric ** appropriate for communication. Returns zero on 5247b12ae1Seric ** success, else an exit status describing the 5347b12ae1Seric ** error. 5408de856eSeric ** host_map_lookup(map, hbuf, avp, pstat) 5505b57da8Seric ** Convert the entry in hbuf into a canonical form. 567fa39d90Seric */ 577fa39d90Seric /* 587fa39d90Seric ** GETREQUESTS -- open mail IPC port and get requests. 597fa39d90Seric ** 607fa39d90Seric ** Parameters: 617fa39d90Seric ** none. 627fa39d90Seric ** 637fa39d90Seric ** Returns: 647fa39d90Seric ** none. 657fa39d90Seric ** 667fa39d90Seric ** Side Effects: 677fa39d90Seric ** Waits until some interesting activity occurs. When 687fa39d90Seric ** it does, a child is created to process it, and the 697fa39d90Seric ** parent waits for completion. Return from this 70147303b1Seric ** routine is always in the child. The file pointers 71147303b1Seric ** "InChannel" and "OutChannel" should be set to point 72147303b1Seric ** to the communication channel. 737fa39d90Seric */ 747fa39d90Seric 75b7d7afcbSeric int DaemonSocket = -1; /* fd describing socket */ 76bfb80540Seric SOCKADDR DaemonAddr; /* socket for incoming */ 77bfc1eaf8Seric int ListenQueueSize = 10; /* size of listen queue */ 78b35447dbSeric int TcpRcvBufferSize = 0; /* size of TCP receive buffer */ 79b35447dbSeric int TcpSndBufferSize = 0; /* size of TCP send buffer */ 801c71e510Seric 818b212fe0Seric void 827fa39d90Seric getrequests() 837fa39d90Seric { 841c71e510Seric int t; 8515d084d5Seric bool refusingconnections = TRUE; 860aae1086Seric FILE *pidf; 87dadb8687Seric int socksize; 88dfe840b2Seric #ifdef XDEBUG 89dfe840b2Seric bool j_has_dot; 90dfe840b2Seric #endif 919b100374Sbostic extern void reapchild(); 92eb889047Seric 93a8268164Seric /* 941c71e510Seric ** Set up the address for the mailer. 95eb889047Seric */ 96eb889047Seric 97bfb80540Seric if (DaemonAddr.sin.sin_family == 0) 98bfb80540Seric DaemonAddr.sin.sin_family = AF_INET; 99bfb80540Seric if (DaemonAddr.sin.sin_addr.s_addr == 0) 100bfb80540Seric DaemonAddr.sin.sin_addr.s_addr = INADDR_ANY; 101bfb80540Seric if (DaemonAddr.sin.sin_port == 0) 102bfb80540Seric { 103e5311662Seric register struct servent *sp; 104e5311662Seric 1051c71e510Seric sp = getservbyname("smtp", "tcp"); 1061c71e510Seric if (sp == NULL) 107d0a9e852Seric { 108ad977999Seric syserr("554 service \"smtp\" unknown"); 109e5311662Seric DaemonAddr.sin.sin_port = htons(25); 1101c71e510Seric } 111e5311662Seric else 112bfb80540Seric DaemonAddr.sin.sin_port = sp->s_port; 113bfb80540Seric } 1141c71e510Seric 1151c71e510Seric /* 1161c71e510Seric ** Try to actually open the connection. 1171c71e510Seric */ 1181c71e510Seric 1191c71e510Seric if (tTd(15, 1)) 120bfb80540Seric printf("getrequests: port 0x%x\n", DaemonAddr.sin.sin_port); 1211c71e510Seric 1221c71e510Seric /* get a socket for the SMTP connection */ 12388ea5609Seric socksize = opendaemonsocket(TRUE); 1241c71e510Seric 1252b9178d3Seric (void) setsignal(SIGCHLD, reapchild); 12652308a50Seric 1270aae1086Seric /* write the pid to the log file for posterity */ 1280aae1086Seric pidf = fopen(PidFile, "w"); 1290aae1086Seric if (pidf != NULL) 1300aae1086Seric { 13137950f67Seric extern char *CommandLineArgs; 13237950f67Seric 13337950f67Seric /* write the process id on line 1 */ 1340aae1086Seric fprintf(pidf, "%d\n", getpid()); 13537950f67Seric 13637950f67Seric /* line 2 contains all command line flags */ 13737950f67Seric fprintf(pidf, "%s\n", CommandLineArgs); 13837950f67Seric 13937950f67Seric /* flush and close */ 1400aae1086Seric fclose(pidf); 1410aae1086Seric } 1420aae1086Seric 143dfe840b2Seric #ifdef XDEBUG 144dfe840b2Seric { 14535852b23Seric char jbuf[MAXHOSTNAMELEN]; 146dfe840b2Seric 1478b212fe0Seric expand("\201j", jbuf, sizeof jbuf, CurEnv); 14835852b23Seric j_has_dot = strchr(jbuf, '.') != NULL; 149dfe840b2Seric } 150dfe840b2Seric #endif 1510aae1086Seric 1521c71e510Seric if (tTd(15, 1)) 153b7d7afcbSeric printf("getrequests: %d\n", DaemonSocket); 1541c71e510Seric 1551c71e510Seric for (;;) 1561c71e510Seric { 1573a099713Seric register int pid; 158a44d5a5eSeric auto int lotherend; 15915d084d5Seric extern bool refuseconnections(); 1608b212fe0Seric extern int getla(); 1613a099713Seric 1623a099713Seric /* see if we are rejecting connections */ 16315d084d5Seric CurrentLA = getla(); 16415d084d5Seric if (refuseconnections()) 1656775ec03Sbostic { 1660084e6f6Seric if (DaemonSocket >= 0) 16715d084d5Seric { 1680084e6f6Seric /* close socket so peer will fail quickly */ 1690084e6f6Seric (void) close(DaemonSocket); 1700084e6f6Seric DaemonSocket = -1; 17115d084d5Seric } 1720084e6f6Seric refusingconnections = TRUE; 17371e5e267Seric setproctitle("rejecting connections: load average: %d", 17471e5e267Seric CurrentLA); 1750084e6f6Seric sleep(15); 17615d084d5Seric continue; 17715d084d5Seric } 17815d084d5Seric 1798b212fe0Seric /* arrange to (re)open the socket if necessary */ 18015d084d5Seric if (refusingconnections) 18115d084d5Seric { 1828a0cb579Seric (void) opendaemonsocket(FALSE); 18315d084d5Seric setproctitle("accepting connections"); 18415d084d5Seric refusingconnections = FALSE; 1856775ec03Sbostic } 186a44d5a5eSeric 187dfe840b2Seric #ifdef XDEBUG 188dfe840b2Seric /* check for disaster */ 189dfe840b2Seric { 19035852b23Seric char jbuf[MAXHOSTNAMELEN]; 191dfe840b2Seric 1928b212fe0Seric expand("\201j", jbuf, sizeof jbuf, CurEnv); 1938b212fe0Seric if (!wordinclass(jbuf, 'w')) 194dfe840b2Seric { 195dfe840b2Seric dumpstate("daemon lost $j"); 196dfe840b2Seric syslog(LOG_ALERT, "daemon process doesn't have $j in $=w; see syslog"); 197dfe840b2Seric abort(); 198dfe840b2Seric } 19935852b23Seric else if (j_has_dot && strchr(jbuf, '.') == NULL) 200dfe840b2Seric { 201dfe840b2Seric dumpstate("daemon $j lost dot"); 202dfe840b2Seric syslog(LOG_ALERT, "daemon process $j lost dot; see syslog"); 203dfe840b2Seric abort(); 204dfe840b2Seric } 205dfe840b2Seric } 206dfe840b2Seric #endif 207dfe840b2Seric 2081c71e510Seric /* wait for a connection */ 2091c71e510Seric do 2101c71e510Seric { 2111c71e510Seric errno = 0; 212dadb8687Seric lotherend = socksize; 2139b100374Sbostic t = accept(DaemonSocket, 2149b100374Sbostic (struct sockaddr *)&RealHostAddr, &lotherend); 2151c71e510Seric } while (t < 0 && errno == EINTR); 2161c71e510Seric if (t < 0) 2171c71e510Seric { 2181c71e510Seric syserr("getrequests: accept"); 2198b212fe0Seric 2208b212fe0Seric /* arrange to re-open the socket next time around */ 2218b212fe0Seric (void) close(DaemonSocket); 2228b212fe0Seric DaemonSocket = -1; 2231c71e510Seric sleep(5); 2241c71e510Seric continue; 2251c71e510Seric } 226d0a9e852Seric 227d0a9e852Seric /* 228d0a9e852Seric ** Create a subprocess to process the mail. 229d0a9e852Seric */ 230d0a9e852Seric 23161e4310fSeric if (tTd(15, 2)) 2321c71e510Seric printf("getrequests: forking (fd = %d)\n", t); 233eb889047Seric 234a8268164Seric pid = fork(); 235a8268164Seric if (pid < 0) 236a8268164Seric { 237a8268164Seric syserr("daemon: cannot fork"); 238a8268164Seric sleep(10); 2391c71e510Seric (void) close(t); 240a8268164Seric continue; 241a8268164Seric } 242a8268164Seric 243a8268164Seric if (pid == 0) 244a8268164Seric { 245da662164Seric char *p; 2469f8b0eadSeric extern char *hostnamebyanyaddr(); 2478b212fe0Seric extern void intsig(); 248a44d5a5eSeric 249a8268164Seric /* 250a8268164Seric ** CHILD -- return to caller. 251a44d5a5eSeric ** Collect verified idea of sending host. 252a8268164Seric ** Verify calling user id if possible here. 253a8268164Seric */ 254a8268164Seric 2552b9178d3Seric (void) setsignal(SIGCHLD, SIG_DFL); 2568b212fe0Seric (void) setsignal(SIGHUP, intsig); 2578b212fe0Seric (void) close(DaemonSocket); 2589f9b003eSeric DisConnected = FALSE; 259779ac194Seric 2604dd09a90Seric setproctitle("startup with %s", 2614dd09a90Seric anynet_ntoa(&RealHostAddr)); 2624dd09a90Seric 263a44d5a5eSeric /* determine host name */ 264da662164Seric p = hostnamebyanyaddr(&RealHostAddr); 265da662164Seric RealHostName = newstr(p); 2664dd09a90Seric setproctitle("startup with %s", p); 26729dcf4baSeric 2682a6bc25bSeric #ifdef LOG 2691f2ff1a4Seric if (LogLevel > 11) 2702a6bc25bSeric { 2712a6bc25bSeric /* log connection information */ 2722a6bc25bSeric syslog(LOG_INFO, "connect from %s (%s)", 2739f8b0eadSeric RealHostName, anynet_ntoa(&RealHostAddr)); 2742a6bc25bSeric } 2752a6bc25bSeric #endif 2762a6bc25bSeric 277335eae58Seric if ((InChannel = fdopen(t, "r")) == NULL || 278335eae58Seric (t = dup(t)) < 0 || 279335eae58Seric (OutChannel = fdopen(t, "w")) == NULL) 280335eae58Seric { 281335eae58Seric syserr("cannot open SMTP server channel, fd=%d", t); 282335eae58Seric exit(0); 283335eae58Seric } 284244b09d1Seric 28529dcf4baSeric /* should we check for illegal connection here? XXX */ 286e17a3a5aSeric #ifdef XLA 287e17a3a5aSeric if (!xla_host_ok(RealHostName)) 288e17a3a5aSeric { 289244b09d1Seric message("421 Too many SMTP sessions for this host"); 290e17a3a5aSeric exit(0); 291e17a3a5aSeric } 292e17a3a5aSeric #endif 293a44d5a5eSeric 29461e4310fSeric if (tTd(15, 2)) 295d0a9e852Seric printf("getreq: returning\n"); 296a8268164Seric return; 297a8268164Seric } 298a8268164Seric 2993c154354Seric /* close the port so that others will hang (for a while) */ 3003c154354Seric (void) close(t); 3018e3e4b17Seric } 3023c154354Seric /*NOTREACHED*/ 3033c154354Seric } 3048e3e4b17Seric /* 3050084e6f6Seric ** OPENDAEMONSOCKET -- open the SMTP socket 3060084e6f6Seric ** 3070084e6f6Seric ** Deals with setting all appropriate options. DaemonAddr must 3080084e6f6Seric ** be set up in advance. 3090084e6f6Seric ** 3100084e6f6Seric ** Parameters: 31188ea5609Seric ** firsttime -- set if this is the initial open. 3120084e6f6Seric ** 3130084e6f6Seric ** Returns: 3140084e6f6Seric ** Size in bytes of the daemon socket addr. 3150084e6f6Seric ** 3160084e6f6Seric ** Side Effects: 3170084e6f6Seric ** Leaves DaemonSocket set to the open socket. 3180084e6f6Seric ** Exits if the socket cannot be created. 3190084e6f6Seric */ 3200084e6f6Seric 3216173568dSeric #define MAXOPENTRIES 10 /* maximum number of tries to open connection */ 3226173568dSeric 3230084e6f6Seric int 32488ea5609Seric opendaemonsocket(firsttime) 32588ea5609Seric bool firsttime; 3260084e6f6Seric { 3270084e6f6Seric int on = 1; 3288b212fe0Seric int socksize = 0; 3296173568dSeric int ntries = 0; 3306173568dSeric int saveerrno; 3310084e6f6Seric 3320084e6f6Seric if (tTd(15, 2)) 3330084e6f6Seric printf("opendaemonsocket()\n"); 3340084e6f6Seric 3356173568dSeric do 3366173568dSeric { 337254b93c3Seric if (ntries > 0) 338254b93c3Seric sleep(5); 33988ea5609Seric if (firsttime || DaemonSocket < 0) 34088ea5609Seric { 3410084e6f6Seric DaemonSocket = socket(DaemonAddr.sa.sa_family, SOCK_STREAM, 0); 3420084e6f6Seric if (DaemonSocket < 0) 3430084e6f6Seric { 3440084e6f6Seric /* probably another daemon already */ 3456173568dSeric saveerrno = errno; 3460084e6f6Seric syserr("opendaemonsocket: can't create server SMTP socket"); 3470084e6f6Seric severe: 3480084e6f6Seric # ifdef LOG 3490084e6f6Seric if (LogLevel > 0) 3500084e6f6Seric syslog(LOG_ALERT, "problem creating SMTP socket"); 3510084e6f6Seric # endif /* LOG */ 3526173568dSeric DaemonSocket = -1; 3536173568dSeric continue; 3540084e6f6Seric } 3550084e6f6Seric 3560084e6f6Seric /* turn on network debugging? */ 3570084e6f6Seric if (tTd(15, 101)) 3586173568dSeric (void) setsockopt(DaemonSocket, SOL_SOCKET, 3596173568dSeric SO_DEBUG, (char *)&on, 3606173568dSeric sizeof on); 3610084e6f6Seric 3626173568dSeric (void) setsockopt(DaemonSocket, SOL_SOCKET, 3636173568dSeric SO_REUSEADDR, (char *)&on, sizeof on); 3646173568dSeric (void) setsockopt(DaemonSocket, SOL_SOCKET, 3656173568dSeric SO_KEEPALIVE, (char *)&on, sizeof on); 3660084e6f6Seric 3670084e6f6Seric #ifdef SO_RCVBUF 3680084e6f6Seric if (TcpRcvBufferSize > 0) 3690084e6f6Seric { 3706173568dSeric if (setsockopt(DaemonSocket, SOL_SOCKET, 3716173568dSeric SO_RCVBUF, 3720084e6f6Seric (char *) &TcpRcvBufferSize, 3730084e6f6Seric sizeof(TcpRcvBufferSize)) < 0) 3740084e6f6Seric syserr("getrequests: setsockopt(SO_RCVBUF)"); 3750084e6f6Seric } 3760084e6f6Seric #endif 3770084e6f6Seric 3780084e6f6Seric switch (DaemonAddr.sa.sa_family) 3790084e6f6Seric { 3800084e6f6Seric # ifdef NETINET 3810084e6f6Seric case AF_INET: 3820084e6f6Seric socksize = sizeof DaemonAddr.sin; 3830084e6f6Seric break; 3840084e6f6Seric # endif 3850084e6f6Seric 3860084e6f6Seric # ifdef NETISO 3870084e6f6Seric case AF_ISO: 3880084e6f6Seric socksize = sizeof DaemonAddr.siso; 3890084e6f6Seric break; 3900084e6f6Seric # endif 3910084e6f6Seric 3920084e6f6Seric default: 3930084e6f6Seric socksize = sizeof DaemonAddr; 3940084e6f6Seric break; 3950084e6f6Seric } 3960084e6f6Seric 3970084e6f6Seric if (bind(DaemonSocket, &DaemonAddr.sa, socksize) < 0) 3980084e6f6Seric { 3996173568dSeric saveerrno = errno; 4000084e6f6Seric syserr("getrequests: cannot bind"); 4010084e6f6Seric (void) close(DaemonSocket); 4020084e6f6Seric goto severe; 4030084e6f6Seric } 40488ea5609Seric } 40588ea5609Seric if (!firsttime && listen(DaemonSocket, ListenQueueSize) < 0) 4060084e6f6Seric { 4076173568dSeric saveerrno = errno; 4080084e6f6Seric syserr("getrequests: cannot listen"); 4090084e6f6Seric (void) close(DaemonSocket); 4100084e6f6Seric goto severe; 4110084e6f6Seric } 4120084e6f6Seric return socksize; 4136173568dSeric } while (ntries++ < MAXOPENTRIES && transienterror(saveerrno)); 4148b212fe0Seric syserr("!opendaemonsocket: server SMTP socket wedged: exiting"); 4156173568dSeric finis(); 4160084e6f6Seric } 4170084e6f6Seric /* 418b7d7afcbSeric ** CLRDAEMON -- reset the daemon connection 419b7d7afcbSeric ** 420b7d7afcbSeric ** Parameters: 421b7d7afcbSeric ** none. 422b7d7afcbSeric ** 423b7d7afcbSeric ** Returns: 424b7d7afcbSeric ** none. 425b7d7afcbSeric ** 426b7d7afcbSeric ** Side Effects: 427b7d7afcbSeric ** releases any resources used by the passive daemon. 428b7d7afcbSeric */ 429b7d7afcbSeric 4308b212fe0Seric void 431b7d7afcbSeric clrdaemon() 432b7d7afcbSeric { 433b7d7afcbSeric if (DaemonSocket >= 0) 434b7d7afcbSeric (void) close(DaemonSocket); 435b7d7afcbSeric DaemonSocket = -1; 436b7d7afcbSeric } 437b7d7afcbSeric /* 438bfb80540Seric ** SETDAEMONOPTIONS -- set options for running the daemon 439bfb80540Seric ** 440bfb80540Seric ** Parameters: 441bfb80540Seric ** p -- the options line. 442bfb80540Seric ** 443bfb80540Seric ** Returns: 444bfb80540Seric ** none. 445bfb80540Seric */ 446bfb80540Seric 4478b212fe0Seric void 448bfb80540Seric setdaemonoptions(p) 449bfb80540Seric register char *p; 450bfb80540Seric { 451850144caSeric if (DaemonAddr.sa.sa_family == AF_UNSPEC) 452850144caSeric DaemonAddr.sa.sa_family = AF_INET; 453850144caSeric 454bfb80540Seric while (p != NULL) 455bfb80540Seric { 456bfb80540Seric register char *f; 457bfb80540Seric register char *v; 458bfb80540Seric 459bfb80540Seric while (isascii(*p) && isspace(*p)) 460bfb80540Seric p++; 461bfb80540Seric if (*p == '\0') 462bfb80540Seric break; 463bfb80540Seric f = p; 464bfb80540Seric p = strchr(p, ','); 465bfb80540Seric if (p != NULL) 466bfb80540Seric *p++ = '\0'; 467bfb80540Seric v = strchr(f, '='); 468bfb80540Seric if (v == NULL) 469bfb80540Seric continue; 470bfb80540Seric while (isascii(*++v) && isspace(*v)) 471bfb80540Seric continue; 472bfb80540Seric 473bfb80540Seric switch (*f) 474bfb80540Seric { 475850144caSeric case 'F': /* address family */ 476850144caSeric if (isascii(*v) && isdigit(*v)) 477850144caSeric DaemonAddr.sa.sa_family = atoi(v); 478850144caSeric #ifdef NETINET 479850144caSeric else if (strcasecmp(v, "inet") == 0) 480850144caSeric DaemonAddr.sa.sa_family = AF_INET; 481850144caSeric #endif 482850144caSeric #ifdef NETISO 483850144caSeric else if (strcasecmp(v, "iso") == 0) 484850144caSeric DaemonAddr.sa.sa_family = AF_ISO; 485850144caSeric #endif 486850144caSeric #ifdef NETNS 487850144caSeric else if (strcasecmp(v, "ns") == 0) 488850144caSeric DaemonAddr.sa.sa_family = AF_NS; 489850144caSeric #endif 490850144caSeric #ifdef NETX25 491850144caSeric else if (strcasecmp(v, "x.25") == 0) 492850144caSeric DaemonAddr.sa.sa_family = AF_CCITT; 493850144caSeric #endif 494850144caSeric else 495850144caSeric syserr("554 Unknown address family %s in Family=option", v); 496850144caSeric break; 497850144caSeric 498850144caSeric case 'A': /* address */ 499850144caSeric switch (DaemonAddr.sa.sa_family) 500850144caSeric { 501850144caSeric #ifdef NETINET 502850144caSeric case AF_INET: 503850144caSeric if (isascii(*v) && isdigit(*v)) 5048b212fe0Seric DaemonAddr.sin.sin_addr.s_addr = htonl(inet_network(v)); 505850144caSeric else 506850144caSeric { 507850144caSeric register struct netent *np; 508850144caSeric 509850144caSeric np = getnetbyname(v); 510850144caSeric if (np == NULL) 511850144caSeric syserr("554 network \"%s\" unknown", v); 512850144caSeric else 513850144caSeric DaemonAddr.sin.sin_addr.s_addr = np->n_net; 514850144caSeric } 515850144caSeric break; 516850144caSeric #endif 517850144caSeric 518850144caSeric default: 519850144caSeric syserr("554 Address= option unsupported for family %d", 520850144caSeric DaemonAddr.sa.sa_family); 521850144caSeric break; 522850144caSeric } 523850144caSeric break; 524850144caSeric 525bfb80540Seric case 'P': /* port */ 526850144caSeric switch (DaemonAddr.sa.sa_family) 527850144caSeric { 528850144caSeric short port; 529850144caSeric 530850144caSeric #ifdef NETINET 531850144caSeric case AF_INET: 532bfb80540Seric if (isascii(*v) && isdigit(*v)) 53376b70c58Seric DaemonAddr.sin.sin_port = htons(atoi(v)); 534bfb80540Seric else 535bfb80540Seric { 536bfb80540Seric register struct servent *sp; 537bfb80540Seric 538bfb80540Seric sp = getservbyname(v, "tcp"); 539bfb80540Seric if (sp == NULL) 540ad977999Seric syserr("554 service \"%s\" unknown", v); 541bfb80540Seric else 542bfb80540Seric DaemonAddr.sin.sin_port = sp->s_port; 543bfb80540Seric } 544bfb80540Seric break; 545850144caSeric #endif 546bfb80540Seric 547850144caSeric #ifdef NETISO 548850144caSeric case AF_ISO: 549850144caSeric /* assume two byte transport selector */ 550bfb80540Seric if (isascii(*v) && isdigit(*v)) 55176b70c58Seric port = htons(atoi(v)); 552bfb80540Seric else 553bfb80540Seric { 554850144caSeric register struct servent *sp; 555bfb80540Seric 556850144caSeric sp = getservbyname(v, "tcp"); 557850144caSeric if (sp == NULL) 558ad977999Seric syserr("554 service \"%s\" unknown", v); 559bfb80540Seric else 560850144caSeric port = sp->s_port; 561850144caSeric } 562850144caSeric bcopy((char *) &port, TSEL(&DaemonAddr.siso), 2); 563850144caSeric break; 564850144caSeric #endif 565850144caSeric 566850144caSeric default: 567850144caSeric syserr("554 Port= option unsupported for family %d", 568850144caSeric DaemonAddr.sa.sa_family); 569850144caSeric break; 570bfb80540Seric } 571bfb80540Seric break; 572bfc1eaf8Seric 573bfc1eaf8Seric case 'L': /* listen queue size */ 574bfc1eaf8Seric ListenQueueSize = atoi(v); 575bfc1eaf8Seric break; 576b35447dbSeric 577b35447dbSeric case 'S': /* send buffer size */ 578b35447dbSeric TcpSndBufferSize = atoi(v); 579b35447dbSeric break; 580b35447dbSeric 581b35447dbSeric case 'R': /* receive buffer size */ 582b35447dbSeric TcpRcvBufferSize = atoi(v); 583b35447dbSeric break; 584bfb80540Seric } 585bfb80540Seric } 586bfb80540Seric } 587bfb80540Seric /* 5887aa493c5Seric ** MAKECONNECTION -- make a connection to an SMTP socket on another machine. 5897aa493c5Seric ** 5907aa493c5Seric ** Parameters: 5917aa493c5Seric ** host -- the name of the host. 59248ff0a9dSeric ** port -- the port number to connect to. 593655feedbSeric ** mci -- a pointer to the mail connection information 594655feedbSeric ** structure to be filled in. 595914346b1Seric ** usesecureport -- if set, use a low numbered (reserved) 596914346b1Seric ** port to provide some rudimentary authentication. 5977aa493c5Seric ** 5987aa493c5Seric ** Returns: 5997aa493c5Seric ** An exit code telling whether the connection could be 6007aa493c5Seric ** made and if not why not. 6017aa493c5Seric ** 6027aa493c5Seric ** Side Effects: 6037aa493c5Seric ** none. 6047aa493c5Seric */ 6057aa493c5Seric 606e2f2f828Seric SOCKADDR CurHostAddr; /* address of current host */ 60771ff6caaSeric 608b31e7f2bSeric int 609655feedbSeric makeconnection(host, port, mci, usesecureport) 6107aa493c5Seric char *host; 611210215eaSeric u_short port; 612b31e7f2bSeric register MCI *mci; 613914346b1Seric bool usesecureport; 6147aa493c5Seric { 6158b212fe0Seric register int i = 0; 6168b212fe0Seric register int s; 61704344589Sbloom register struct hostent *hp = (struct hostent *)NULL; 618e2f2f828Seric SOCKADDR addr; 6196286bb75Sbloom int sav_errno; 620e2f2f828Seric int addrlen; 6218b212fe0Seric bool firstconnect; 6229d4a8008Seric #if NAMED_BIND 623134746fbSeric extern int h_errno; 624134746fbSeric #endif 6257aa493c5Seric 6267aa493c5Seric /* 6277aa493c5Seric ** Set up the address for the mailer. 62871096d12Seric ** Accept "[a.b.c.d]" syntax for host name. 6297aa493c5Seric */ 6307aa493c5Seric 6319d4a8008Seric #if NAMED_BIND 632794bdbb9Smiriam h_errno = 0; 633134746fbSeric #endif 634794bdbb9Smiriam errno = 0; 635967778e2Seric bzero(&CurHostAddr, sizeof CurHostAddr); 636c931b82bSeric SmtpPhase = mci->mci_phase = "initial connection"; 637d945ebe8Seric CurHostName = host; 638794bdbb9Smiriam 63971096d12Seric if (host[0] == '[') 64071096d12Seric { 641a44d5a5eSeric long hid; 6426c2c3107Seric register char *p = strchr(host, ']'); 64371096d12Seric 644a44d5a5eSeric if (p != NULL) 64571096d12Seric { 646a44d5a5eSeric *p = '\0'; 6474d9c42c2Seric #ifdef NETINET 648a44d5a5eSeric hid = inet_addr(&host[1]); 649a7e21fe6Seric if (hid == -1) 6504d9c42c2Seric #endif 651a7e21fe6Seric { 652a7e21fe6Seric /* try it as a host name (avoid MX lookup) */ 6538b212fe0Seric hp = sm_gethostbyname(&host[1]); 654d8984352Seric if (hp == NULL && p[-1] == '.') 655d8984352Seric { 6568b212fe0Seric #if NAMED_BIND 6578b212fe0Seric int oldopts = _res.options; 6588b212fe0Seric 6598b212fe0Seric _res.options &= ~(RES_DEFNAMES|RES_DNSRCH); 6608b212fe0Seric #endif 661d8984352Seric p[-1] = '\0'; 6628b212fe0Seric hp = sm_gethostbyname(&host[1]); 663d8984352Seric p[-1] = '.'; 6648b212fe0Seric #if NAMED_BIND 6658b212fe0Seric _res.options = oldopts; 6668b212fe0Seric #endif 667d8984352Seric } 668a7e21fe6Seric *p = ']'; 669a7e21fe6Seric goto gothostent; 670a7e21fe6Seric } 671a44d5a5eSeric *p = ']'; 67271096d12Seric } 673a7e21fe6Seric if (p == NULL) 67471096d12Seric { 67508b25121Seric usrerr("553 Invalid numeric domain spec \"%s\"", host); 67671096d12Seric return (EX_NOHOST); 67771096d12Seric } 6784d9c42c2Seric #ifdef NETINET 6794d9c42c2Seric addr.sin.sin_family = AF_INET; /*XXX*/ 68083c1f4bcSeric addr.sin.sin_addr.s_addr = hid; 6814d9c42c2Seric #endif 68271096d12Seric } 6831c71e510Seric else 6841c71e510Seric { 685d8984352Seric register char *p = &host[strlen(host) - 1]; 686d8984352Seric 6878b212fe0Seric hp = sm_gethostbyname(host); 688d8984352Seric if (hp == NULL && *p == '.') 689d8984352Seric { 6908b212fe0Seric #if NAMED_BIND 6918b212fe0Seric int oldopts = _res.options; 6928b212fe0Seric 6938b212fe0Seric _res.options &= ~(RES_DEFNAMES|RES_DNSRCH); 6948b212fe0Seric #endif 695d8984352Seric *p = '\0'; 6968b212fe0Seric hp = sm_gethostbyname(host); 697d8984352Seric *p = '.'; 6988b212fe0Seric #if NAMED_BIND 6998b212fe0Seric _res.options = oldopts; 7008b212fe0Seric #endif 701d8984352Seric } 702a7e21fe6Seric gothostent: 703794bdbb9Smiriam if (hp == NULL) 704794bdbb9Smiriam { 7059d4a8008Seric #if NAMED_BIND 7068b212fe0Seric /* check for name server timeouts */ 7078b212fe0Seric if (errno == ETIMEDOUT || h_errno == TRY_AGAIN || 7088b212fe0Seric (errno == ECONNREFUSED && UseNameServer)) 7098b212fe0Seric { 7108b212fe0Seric mci->mci_status = "4.4.3"; 71152308a50Seric return (EX_TEMPFAIL); 7128b212fe0Seric } 713134746fbSeric #endif 7147aa493c5Seric return (EX_NOHOST); 715794bdbb9Smiriam } 71683c1f4bcSeric addr.sa.sa_family = hp->h_addrtype; 71783c1f4bcSeric switch (hp->h_addrtype) 71883c1f4bcSeric { 71983c1f4bcSeric #ifdef NETINET 72083c1f4bcSeric case AF_INET: 721e2f2f828Seric bcopy(hp->h_addr, 72283c1f4bcSeric &addr.sin.sin_addr, 7238b212fe0Seric INADDRSZ); 72483c1f4bcSeric break; 72583c1f4bcSeric #endif 72683c1f4bcSeric 72783c1f4bcSeric default: 728e2f2f828Seric bcopy(hp->h_addr, 72983c1f4bcSeric addr.sa.sa_data, 730e2f2f828Seric hp->h_length); 73183c1f4bcSeric break; 73283c1f4bcSeric } 73304344589Sbloom i = 1; 7341c71e510Seric } 7351c71e510Seric 7361c71e510Seric /* 7371c71e510Seric ** Determine the port number. 7381c71e510Seric */ 7391c71e510Seric 740fd7c0790Seric if (port != 0) 741e2f2f828Seric port = htons(port); 742fd7c0790Seric else 7431c71e510Seric { 7441c71e510Seric register struct servent *sp = getservbyname("smtp", "tcp"); 7451c71e510Seric 7461c71e510Seric if (sp == NULL) 7471c71e510Seric { 7483edb2e00Seric #ifdef LOG 7493edb2e00Seric if (LogLevel > 2) 7503edb2e00Seric syslog(LOG_ERR, "makeconnection: service \"smtp\" unknown"); 7513edb2e00Seric #endif 752e5311662Seric port = htons(25); 7531c71e510Seric } 754e5311662Seric else 755e2f2f828Seric port = sp->s_port; 756e2f2f828Seric } 757e2f2f828Seric 75883c1f4bcSeric switch (addr.sa.sa_family) 759e2f2f828Seric { 7604d9c42c2Seric #ifdef NETINET 761e2f2f828Seric case AF_INET: 76283c1f4bcSeric addr.sin.sin_port = port; 763e2f2f828Seric addrlen = sizeof (struct sockaddr_in); 764e2f2f828Seric break; 7654d9c42c2Seric #endif 766e2f2f828Seric 767e2f2f828Seric #ifdef NETISO 768e2f2f828Seric case AF_ISO: 769e2f2f828Seric /* assume two byte transport selector */ 770e2f2f828Seric bcopy((char *) &port, TSEL((struct sockaddr_iso *) &addr), 2); 771e2f2f828Seric addrlen = sizeof (struct sockaddr_iso); 772e2f2f828Seric break; 773e2f2f828Seric #endif 774e2f2f828Seric 775e2f2f828Seric default: 77683c1f4bcSeric syserr("Can't connect to address family %d", addr.sa.sa_family); 777e2f2f828Seric return (EX_NOHOST); 7781c71e510Seric } 7797aa493c5Seric 7807aa493c5Seric /* 7817aa493c5Seric ** Try to actually open the connection. 7827aa493c5Seric */ 7837aa493c5Seric 784e17a3a5aSeric #ifdef XLA 785e17a3a5aSeric /* if too many connections, don't bother trying */ 786e17a3a5aSeric if (!xla_noqueue_ok(host)) 787e17a3a5aSeric return EX_TEMPFAIL; 788e17a3a5aSeric #endif 789e17a3a5aSeric 7908b212fe0Seric firstconnect = TRUE; 791aea02ca1Seric for (;;) 792aea02ca1Seric { 79361e4310fSeric if (tTd(16, 1)) 794e2f2f828Seric printf("makeconnection (%s [%s])\n", 795e2f2f828Seric host, anynet_ntoa(&addr)); 7967aa493c5Seric 797226e3022Seric /* save for logging */ 798226e3022Seric CurHostAddr = addr; 799226e3022Seric 800914346b1Seric if (usesecureport) 801914346b1Seric { 802914346b1Seric int rport = IPPORT_RESERVED - 1; 803914346b1Seric 804914346b1Seric s = rresvport(&rport); 805914346b1Seric } 806914346b1Seric else 807914346b1Seric { 808af5e902cSeric s = socket(AF_INET, SOCK_STREAM, 0); 809914346b1Seric } 8107aa493c5Seric if (s < 0) 8117aa493c5Seric { 8126286bb75Sbloom sav_errno = errno; 813914346b1Seric syserr("makeconnection: no socket"); 8147aa493c5Seric goto failure; 8157aa493c5Seric } 8167aa493c5Seric 817b35447dbSeric #ifdef SO_SNDBUF 818b35447dbSeric if (TcpSndBufferSize > 0) 819b35447dbSeric { 820b35447dbSeric if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, 821bf217a95Seric (char *) &TcpSndBufferSize, 822b35447dbSeric sizeof(TcpSndBufferSize)) < 0) 823b35447dbSeric syserr("makeconnection: setsockopt(SO_SNDBUF)"); 824b35447dbSeric } 825b35447dbSeric #endif 826b35447dbSeric 82761e4310fSeric if (tTd(16, 1)) 828b31e7f2bSeric printf("makeconnection: fd=%d\n", s); 8291b6e4a15Seric 8301b6e4a15Seric /* turn on network debugging? */ 831a2ef5fa4Seric if (tTd(16, 101)) 83252308a50Seric { 83352308a50Seric int on = 1; 8346173568dSeric (void) setsockopt(s, SOL_SOCKET, SO_DEBUG, 835aea02ca1Seric (char *)&on, sizeof on); 83652308a50Seric } 83787d6e633Srick if (CurEnv->e_xfp != NULL) 838877a6142Seric (void) fflush(CurEnv->e_xfp); /* for debugging */ 8394bd6a662Seric errno = 0; /* for debugging */ 840e2f2f828Seric if (connect(s, (struct sockaddr *) &addr, addrlen) >= 0) 841aea02ca1Seric break; 842aea02ca1Seric 8438b212fe0Seric /* if running demand-dialed connection, try again */ 8448b212fe0Seric if (DialDelay > 0 && firstconnect) 8458b212fe0Seric { 8468b212fe0Seric if (tTd(16, 1)) 8478b212fe0Seric printf("Connect failed (%s); trying again...\n", 8488b212fe0Seric errstring(sav_errno)); 8498b212fe0Seric firstconnect = FALSE; 8508b212fe0Seric sleep(DialDelay); 8518b212fe0Seric continue; 8528b212fe0Seric } 8538b212fe0Seric 854aea02ca1Seric /* couldn't connect.... figure out why */ 8556286bb75Sbloom sav_errno = errno; 8566286bb75Sbloom (void) close(s); 8578b212fe0Seric if (hp != NULL && hp->h_addr_list[i]) 85804344589Sbloom { 859aea02ca1Seric if (tTd(16, 1)) 860e2f2f828Seric printf("Connect failed (%s); trying new address....\n", 861e2f2f828Seric errstring(sav_errno)); 86283c1f4bcSeric switch (addr.sa.sa_family) 86383c1f4bcSeric { 86483c1f4bcSeric #ifdef NETINET 86583c1f4bcSeric case AF_INET: 866e2f2f828Seric bcopy(hp->h_addr_list[i++], 86783c1f4bcSeric &addr.sin.sin_addr, 8688b212fe0Seric INADDRSZ); 86983c1f4bcSeric break; 87083c1f4bcSeric #endif 87183c1f4bcSeric 87283c1f4bcSeric default: 873e2f2f828Seric bcopy(hp->h_addr_list[i++], 87483c1f4bcSeric addr.sa.sa_data, 875914346b1Seric hp->h_length); 87683c1f4bcSeric break; 87783c1f4bcSeric } 878aea02ca1Seric continue; 87904344589Sbloom } 88004344589Sbloom 8817aa493c5Seric /* failure, decide if temporary or not */ 8827aa493c5Seric failure: 883244b09d1Seric #ifdef XLA 884244b09d1Seric xla_host_end(host); 885244b09d1Seric #endif 886e2de2524Seric if (transienterror(sav_errno)) 887e2de2524Seric return EX_TEMPFAIL; 888e2de2524Seric else 88987d6e633Srick { 89008b25121Seric message("%s", errstring(sav_errno)); 8917aa493c5Seric return (EX_UNAVAILABLE); 8927aa493c5Seric } 8937aa493c5Seric } 8947aa493c5Seric 8957aa493c5Seric /* connection ok, put it into canonical form */ 896335eae58Seric if ((mci->mci_out = fdopen(s, "w")) == NULL || 897335eae58Seric (s = dup(s)) < 0 || 898ab81ee53Seric (mci->mci_in = fdopen(s, "r")) == NULL) 899335eae58Seric { 900335eae58Seric syserr("cannot open SMTP client channel, fd=%d", s); 901335eae58Seric return EX_TEMPFAIL; 902335eae58Seric } 9037aa493c5Seric 904dca8e1f7Seric return (EX_OK); 9057aa493c5Seric } 906444eaf03Seric /* 907444eaf03Seric ** MYHOSTNAME -- return the name of this host. 908444eaf03Seric ** 909444eaf03Seric ** Parameters: 910444eaf03Seric ** hostbuf -- a place to return the name of this host. 911897f1869Seric ** size -- the size of hostbuf. 912444eaf03Seric ** 913444eaf03Seric ** Returns: 914444eaf03Seric ** A list of aliases for this host. 915444eaf03Seric ** 916444eaf03Seric ** Side Effects: 917d8d0a4aeSeric ** Adds numeric codes to $=w. 918444eaf03Seric */ 919444eaf03Seric 9208b212fe0Seric struct hostent * 921897f1869Seric myhostname(hostbuf, size) 922444eaf03Seric char hostbuf[]; 923897f1869Seric int size; 924444eaf03Seric { 92538ad259dSeric register struct hostent *hp; 9268b212fe0Seric extern bool getcanonname(); 9278b212fe0Seric extern int h_errno; 928444eaf03Seric 929af5e902cSeric if (gethostname(hostbuf, size) < 0) 930af5e902cSeric { 931af5e902cSeric (void) strcpy(hostbuf, "localhost"); 932af5e902cSeric } 9338b212fe0Seric hp = sm_gethostbyname(hostbuf); 9344a5c6430Seric if (hp == NULL) 9358b212fe0Seric return NULL; 9368b212fe0Seric if (strchr(hp->h_name, '.') != NULL || strchr(hostbuf, '.') == NULL) 937423161fbSeric { 93835852b23Seric (void) strncpy(hostbuf, hp->h_name, size - 1); 93935852b23Seric hostbuf[size - 1] = '\0'; 9408b212fe0Seric } 9414a5c6430Seric 9424a5c6430Seric #if NAMED_BIND 9438b212fe0Seric /* 9448b212fe0Seric ** If still no dot, try DNS directly (i.e., avoid NIS problems). 9458b212fe0Seric ** This ought to be driven from the configuration file, but 9468b212fe0Seric ** we are called before the configuration is read. We could 9478b212fe0Seric ** check for an /etc/resolv.conf file, but that isn't required. 9488b212fe0Seric ** All in all, a bit of a mess. 9498b212fe0Seric */ 95023668637Seric 9518b212fe0Seric if (strchr(hostbuf, '.') == NULL && 9528b212fe0Seric !getcanonname(hostbuf, size, TRUE) && 9538b212fe0Seric h_errno == TRY_AGAIN) 95423668637Seric { 9558b212fe0Seric /* try twice in case name server not yet started up */ 9568b212fe0Seric message("My unqualifed host name (%s) unknown to DNS; sleeping for retry", 95723668637Seric hostbuf); 9588b212fe0Seric sleep(60); 9598b212fe0Seric if (!getcanonname(hostbuf, size, TRUE)) 9608b212fe0Seric errno = h_errno + E_DNSBASE; 961747df804Seric } 962747df804Seric #endif 9638b212fe0Seric return (hp); 9647364df9fSeric } 965cb452edcSeric /* 9669f8b0eadSeric ** GETAUTHINFO -- get the real host name asociated with a file descriptor 9679f8b0eadSeric ** 9689f8b0eadSeric ** Uses RFC1413 protocol to try to get info from the other end. 969320e0d1cSeric ** 970320e0d1cSeric ** Parameters: 971320e0d1cSeric ** fd -- the descriptor 972320e0d1cSeric ** 973320e0d1cSeric ** Returns: 9749f8b0eadSeric ** The user@host information associated with this descriptor. 975320e0d1cSeric */ 976320e0d1cSeric 9779f8b0eadSeric static jmp_buf CtxAuthTimeout; 9789f8b0eadSeric 9798b212fe0Seric static void 9809f8b0eadSeric authtimeout() 9819f8b0eadSeric { 9829f8b0eadSeric longjmp(CtxAuthTimeout, 1); 9839f8b0eadSeric } 9849f8b0eadSeric 985320e0d1cSeric char * 9869f8b0eadSeric getauthinfo(fd) 987320e0d1cSeric int fd; 988320e0d1cSeric { 9899f8b0eadSeric int falen; 990a5546e24Seric register char *p; 9919f8b0eadSeric SOCKADDR la; 9929f8b0eadSeric int lalen; 9939f8b0eadSeric register struct servent *sp; 9949f8b0eadSeric int s; 9959f8b0eadSeric int i; 9969f8b0eadSeric EVENT *ev; 997579270a3Seric int nleft; 998f036c8d7Seric char ibuf[MAXNAME + 1]; 9999f8b0eadSeric static char hbuf[MAXNAME * 2 + 2]; 10009f8b0eadSeric extern char *hostnamebyanyaddr(); 10019f8b0eadSeric extern char RealUserName[]; /* main.c */ 1002320e0d1cSeric 1003e29a76d1Seric falen = sizeof RealHostAddr; 10048b212fe0Seric if (isatty(fd) || getpeername(fd, &RealHostAddr.sa, &falen) < 0 || 10058b212fe0Seric falen <= 0 || RealHostAddr.sa.sa_family == 0) 10069f8b0eadSeric { 10079f8b0eadSeric (void) sprintf(hbuf, "%s@localhost", RealUserName); 100853853673Seric if (tTd(9, 1)) 10099f8b0eadSeric printf("getauthinfo: %s\n", hbuf); 1010320e0d1cSeric return hbuf; 1011320e0d1cSeric } 10129f8b0eadSeric 1013e29a76d1Seric if (RealHostName == NULL) 1014e29a76d1Seric { 1015e29a76d1Seric /* translate that to a host name */ 1016e29a76d1Seric RealHostName = newstr(hostnamebyanyaddr(&RealHostAddr)); 1017e29a76d1Seric } 1018e29a76d1Seric 101993b3215bSeric if (TimeOuts.to_ident == 0) 102093b3215bSeric goto noident; 102193b3215bSeric 10229f8b0eadSeric lalen = sizeof la; 1023e29a76d1Seric if (RealHostAddr.sa.sa_family != AF_INET || 10249f8b0eadSeric getsockname(fd, &la.sa, &lalen) < 0 || lalen <= 0 || 10259f8b0eadSeric la.sa.sa_family != AF_INET) 10269f8b0eadSeric { 10279f8b0eadSeric /* no ident info */ 10289f8b0eadSeric goto noident; 10299f8b0eadSeric } 10309f8b0eadSeric 10319f8b0eadSeric /* create ident query */ 103281d2944fSeric (void) sprintf(ibuf, "%d,%d\r\n", 1033e29a76d1Seric ntohs(RealHostAddr.sin.sin_port), ntohs(la.sin.sin_port)); 10349f8b0eadSeric 10359f8b0eadSeric /* create local address */ 1036d6af7dadSeric la.sin.sin_port = 0; 10379f8b0eadSeric 10389f8b0eadSeric /* create foreign address */ 10399f8b0eadSeric sp = getservbyname("auth", "tcp"); 10409f8b0eadSeric if (sp != NULL) 1041e29a76d1Seric RealHostAddr.sin.sin_port = sp->s_port; 10429f8b0eadSeric else 1043e29a76d1Seric RealHostAddr.sin.sin_port = htons(113); 10449f8b0eadSeric 10459f8b0eadSeric s = -1; 10469f8b0eadSeric if (setjmp(CtxAuthTimeout) != 0) 10479f8b0eadSeric { 10489f8b0eadSeric if (s >= 0) 10499f8b0eadSeric (void) close(s); 10509f8b0eadSeric goto noident; 10519f8b0eadSeric } 10529f8b0eadSeric 10539f8b0eadSeric /* put a timeout around the whole thing */ 1054a0f780efSeric ev = setevent(TimeOuts.to_ident, authtimeout, 0); 10559f8b0eadSeric 1056d6af7dadSeric /* connect to foreign IDENT server using same address as SMTP socket */ 10579f8b0eadSeric s = socket(AF_INET, SOCK_STREAM, 0); 10589f8b0eadSeric if (s < 0) 10599f8b0eadSeric { 10609f8b0eadSeric clrevent(ev); 10619f8b0eadSeric goto noident; 10629f8b0eadSeric } 1063d6af7dadSeric if (bind(s, &la.sa, sizeof la.sin) < 0 || 1064e29a76d1Seric connect(s, &RealHostAddr.sa, sizeof RealHostAddr.sin) < 0) 10659f8b0eadSeric { 10667c201575Seric goto closeident; 10679f8b0eadSeric } 10689f8b0eadSeric 106953853673Seric if (tTd(9, 10)) 107081d2944fSeric printf("getauthinfo: sent %s", ibuf); 10719f8b0eadSeric 10729f8b0eadSeric /* send query */ 107381d2944fSeric if (write(s, ibuf, strlen(ibuf)) < 0) 10749f8b0eadSeric goto closeident; 10759f8b0eadSeric 10769f8b0eadSeric /* get result */ 107781d2944fSeric p = &ibuf[0]; 1078b26156f6Seric nleft = sizeof ibuf - 1; 1079579270a3Seric while ((i = read(s, p, nleft)) > 0) 1080579270a3Seric { 1081579270a3Seric p += i; 1082579270a3Seric nleft -= i; 1083579270a3Seric } 10849f8b0eadSeric (void) close(s); 10859f8b0eadSeric clrevent(ev); 108681d2944fSeric if (i < 0 || p == &ibuf[0]) 10879f8b0eadSeric goto noident; 1088579270a3Seric 1089579270a3Seric if (*--p == '\n' && *--p == '\r') 1090579270a3Seric p--; 1091579270a3Seric *++p = '\0'; 10929f8b0eadSeric 109353853673Seric if (tTd(9, 3)) 109481d2944fSeric printf("getauthinfo: got %s\n", ibuf); 10959f8b0eadSeric 10969f8b0eadSeric /* parse result */ 109781d2944fSeric p = strchr(ibuf, ':'); 10989f8b0eadSeric if (p == NULL) 10999f8b0eadSeric { 11009f8b0eadSeric /* malformed response */ 11019f8b0eadSeric goto noident; 11029f8b0eadSeric } 11039f8b0eadSeric while (isascii(*++p) && isspace(*p)) 11049f8b0eadSeric continue; 11059f8b0eadSeric if (strncasecmp(p, "userid", 6) != 0) 11069f8b0eadSeric { 11079f8b0eadSeric /* presumably an error string */ 11089f8b0eadSeric goto noident; 11099f8b0eadSeric } 11109f8b0eadSeric p += 6; 11119f8b0eadSeric while (isascii(*p) && isspace(*p)) 11129f8b0eadSeric p++; 11139f8b0eadSeric if (*p++ != ':') 11149f8b0eadSeric { 11159f8b0eadSeric /* either useridxx or malformed response */ 11169f8b0eadSeric goto noident; 11179f8b0eadSeric } 11189f8b0eadSeric 11199f8b0eadSeric /* p now points to the OSTYPE field */ 11208b212fe0Seric while (isascii(*p) && isspace(*p)) 11218b212fe0Seric p++; 11228b212fe0Seric if (strncasecmp(p, "other", 5) == 0 && 11238b212fe0Seric (p[5] == ':' || p[5] == ' ' || p[5] == ',' || p[5] == '\0')) 11248b212fe0Seric { 11258b212fe0Seric /* not useful information */ 11268b212fe0Seric goto noident; 11278b212fe0Seric } 11289f8b0eadSeric p = strchr(p, ':'); 11299f8b0eadSeric if (p == NULL) 11309f8b0eadSeric { 11319f8b0eadSeric /* malformed response */ 11329f8b0eadSeric goto noident; 11339f8b0eadSeric } 113453853673Seric 113553853673Seric /* 1413 says don't do this -- but it's broken otherwise */ 113653853673Seric while (isascii(*++p) && isspace(*p)) 113753853673Seric continue; 11389f8b0eadSeric 1139a7763879Seric /* p now points to the authenticated name -- copy carefully */ 114081d2944fSeric cleanstrcpy(hbuf, p, MAXNAME); 1141a7763879Seric hbuf[i++] = '@'; 1142a7763879Seric strcpy(&hbuf[i], RealHostName == NULL ? "localhost" : RealHostName); 114353853673Seric goto finish; 114453853673Seric 11457c201575Seric closeident: 11467c201575Seric (void) close(s); 11477c201575Seric clrevent(ev); 11487c201575Seric 114953853673Seric noident: 1150f7869e68Seric if (RealHostName == NULL) 1151f7869e68Seric { 1152f7869e68Seric if (tTd(9, 1)) 1153f7869e68Seric printf("getauthinfo: NULL\n"); 1154f7869e68Seric return NULL; 1155f7869e68Seric } 115653853673Seric (void) strcpy(hbuf, RealHostName); 115753853673Seric 115853853673Seric finish: 1159f7869e68Seric if (RealHostName != NULL && RealHostName[0] != '[') 11609f8b0eadSeric { 11619f8b0eadSeric p = &hbuf[strlen(hbuf)]; 11629f8b0eadSeric (void) sprintf(p, " [%s]", anynet_ntoa(&RealHostAddr)); 11639f8b0eadSeric } 116453853673Seric if (tTd(9, 1)) 11659f8b0eadSeric printf("getauthinfo: %s\n", hbuf); 11669f8b0eadSeric return hbuf; 11679f8b0eadSeric } 1168320e0d1cSeric /* 116908de856eSeric ** HOST_MAP_LOOKUP -- turn a hostname into canonical form 117015d084d5Seric ** 117115d084d5Seric ** Parameters: 117205b57da8Seric ** map -- a pointer to this map (unused). 117308de856eSeric ** name -- the (presumably unqualified) hostname. 117400b385a9Seric ** av -- unused -- for compatibility with other mapping 1175d798a1deSeric ** functions. 11762d29d43aSeric ** statp -- an exit status (out parameter) -- set to 11772d29d43aSeric ** EX_TEMPFAIL if the name server is unavailable. 117815d084d5Seric ** 117915d084d5Seric ** Returns: 118015d084d5Seric ** The mapping, if found. 118115d084d5Seric ** NULL if no mapping found. 118215d084d5Seric ** 118315d084d5Seric ** Side Effects: 118415d084d5Seric ** Looks up the host specified in hbuf. If it is not 118515d084d5Seric ** the canonical name for that host, return the canonical 118615d084d5Seric ** name. 1187f36ede03Sbostic */ 1188cb452edcSeric 118915d084d5Seric char * 119000b385a9Seric host_map_lookup(map, name, av, statp) 119105b57da8Seric MAP *map; 119208de856eSeric char *name; 119300b385a9Seric char **av; 11942d29d43aSeric int *statp; 119599f7cf32Seric { 119699f7cf32Seric register struct hostent *hp; 11978b212fe0Seric struct in_addr in_addr; 119805b57da8Seric char *cp; 1199eea91d78Seric register STAB *s; 12008b212fe0Seric char hbuf[MAXNAME + 1]; 12019d4a8008Seric #if NAMED_BIND 1202eea91d78Seric extern int h_errno; 1203c304a798Seric #endif 12045f78836eSmiriam 1205f36ede03Sbostic /* 1206eea91d78Seric ** See if we have already looked up this name. If so, just 1207eea91d78Seric ** return it. 1208eea91d78Seric */ 1209eea91d78Seric 121008de856eSeric s = stab(name, ST_NAMECANON, ST_ENTER); 1211eea91d78Seric if (bitset(NCF_VALID, s->s_namecanon.nc_flags)) 1212eea91d78Seric { 1213f92c3297Seric if (tTd(9, 1)) 121408de856eSeric printf("host_map_lookup(%s) => CACHE %s\n", 121508de856eSeric name, s->s_namecanon.nc_cname); 1216eea91d78Seric errno = s->s_namecanon.nc_errno; 12179d4a8008Seric #if NAMED_BIND 1218eea91d78Seric h_errno = s->s_namecanon.nc_herrno; 1219c304a798Seric #endif 1220eea91d78Seric *statp = s->s_namecanon.nc_stat; 122192270fb3Seric if (CurEnv->e_message == NULL && *statp == EX_TEMPFAIL) 1222ed63aae0Seric { 1223ed63aae0Seric sprintf(hbuf, "%s: Name server timeout", 1224ed63aae0Seric shortenstring(name, 33)); 1225ed63aae0Seric CurEnv->e_message = newstr(hbuf); 1226ed63aae0Seric } 1227eea91d78Seric return s->s_namecanon.nc_cname; 1228eea91d78Seric } 1229eea91d78Seric 1230eea91d78Seric /* 1231eea91d78Seric ** If first character is a bracket, then it is an address 1232eea91d78Seric ** lookup. Address is copied into a temporary buffer to 123308de856eSeric ** strip the brackets and to preserve name if address is 1234eea91d78Seric ** unknown. 1235f36ede03Sbostic */ 123615d084d5Seric 123708de856eSeric if (*name != '[') 123815d084d5Seric { 1239d798a1deSeric extern bool getcanonname(); 1240d798a1deSeric 12418cb4653dSeric if (tTd(9, 1)) 124208de856eSeric printf("host_map_lookup(%s) => ", name); 1243eea91d78Seric s->s_namecanon.nc_flags |= NCF_VALID; /* will be soon */ 12448b212fe0Seric if (strlen(name) < sizeof hbuf) 124508de856eSeric (void) strcpy(hbuf, name); 12468b212fe0Seric else 12478b212fe0Seric { 12488b212fe0Seric bcopy(name, hbuf, sizeof hbuf - 1); 12498b212fe0Seric hbuf[sizeof hbuf - 1] = '\0'; 12508b212fe0Seric } 12510183c3f6Seric if (getcanonname(hbuf, sizeof hbuf - 1, !NoMXforCanon)) 12529040ec4fSeric { 12539040ec4fSeric if (tTd(9, 1)) 12549040ec4fSeric printf("%s\n", hbuf); 125500b385a9Seric cp = map_rewrite(map, hbuf, strlen(hbuf), av); 125600b385a9Seric s->s_namecanon.nc_cname = newstr(cp); 125700b385a9Seric return cp; 12589040ec4fSeric } 125915d084d5Seric else 12609040ec4fSeric { 12612d29d43aSeric register struct hostent *hp; 12622d29d43aSeric 1263c304a798Seric s->s_namecanon.nc_errno = errno; 12649d4a8008Seric #if NAMED_BIND 1265c304a798Seric s->s_namecanon.nc_herrno = h_errno; 12669040ec4fSeric if (tTd(9, 1)) 12672d29d43aSeric printf("FAIL (%d)\n", h_errno); 12682d29d43aSeric switch (h_errno) 12692d29d43aSeric { 12702d29d43aSeric case TRY_AGAIN: 127189cb2793Seric if (UseNameServer) 12728820d51bSeric { 1273e0326f4fSeric sprintf(hbuf, "%s: Name server timeout", 1274ed63aae0Seric shortenstring(name, 33)); 1275e0326f4fSeric message("%s", hbuf); 12768820d51bSeric if (CurEnv->e_message == NULL) 1277e0326f4fSeric CurEnv->e_message = newstr(hbuf); 12788820d51bSeric } 12792d29d43aSeric *statp = EX_TEMPFAIL; 12802d29d43aSeric break; 12812d29d43aSeric 12822d29d43aSeric case HOST_NOT_FOUND: 12832d29d43aSeric *statp = EX_NOHOST; 12842d29d43aSeric break; 12852d29d43aSeric 12862d29d43aSeric case NO_RECOVERY: 12872d29d43aSeric *statp = EX_SOFTWARE; 12882d29d43aSeric break; 12892d29d43aSeric 12902d29d43aSeric default: 12912d29d43aSeric *statp = EX_UNAVAILABLE; 12922d29d43aSeric break; 12932d29d43aSeric } 1294c304a798Seric #else 1295c304a798Seric if (tTd(9, 1)) 1296c304a798Seric printf("FAIL\n"); 1297c304a798Seric *statp = EX_NOHOST; 1298c304a798Seric #endif 1299eea91d78Seric s->s_namecanon.nc_stat = *statp; 13008b212fe0Seric if ((*statp != EX_TEMPFAIL && *statp != EX_NOHOST) || 13018b212fe0Seric UseNameServer) 130215d084d5Seric return NULL; 13032d29d43aSeric 13042d29d43aSeric /* 13052d29d43aSeric ** Try to look it up in /etc/hosts 13062d29d43aSeric */ 13072d29d43aSeric 13088b212fe0Seric hp = sm_gethostbyname(name); 13092d29d43aSeric if (hp == NULL) 13102d29d43aSeric { 13112d29d43aSeric /* no dice there either */ 1312eea91d78Seric s->s_namecanon.nc_stat = *statp = EX_NOHOST; 13132d29d43aSeric return NULL; 13142d29d43aSeric } 13152d29d43aSeric 1316eea91d78Seric s->s_namecanon.nc_stat = *statp = EX_OK; 131700b385a9Seric cp = map_rewrite(map, hp->h_name, strlen(hp->h_name), av); 131800b385a9Seric s->s_namecanon.nc_cname = newstr(cp); 131900b385a9Seric return cp; 132015d084d5Seric } 13219040ec4fSeric } 132208de856eSeric if ((cp = strchr(name, ']')) == NULL) 132315d084d5Seric return (NULL); 132434e39927Sbostic *cp = '\0'; 13258b212fe0Seric in_addr.s_addr = inet_addr(&name[1]); 132638ad259dSeric 132738ad259dSeric /* nope -- ask the name server */ 13288b212fe0Seric hp = sm_gethostbyaddr((char *)&in_addr, INADDRSZ, AF_INET); 1329eea91d78Seric s->s_namecanon.nc_errno = errno; 13309d4a8008Seric #if NAMED_BIND 1331eea91d78Seric s->s_namecanon.nc_herrno = h_errno; 1332c304a798Seric #endif 1333eea91d78Seric s->s_namecanon.nc_flags |= NCF_VALID; /* will be soon */ 13345f78836eSmiriam if (hp == NULL) 1335eea91d78Seric { 1336eea91d78Seric s->s_namecanon.nc_stat = *statp = EX_NOHOST; 133715d084d5Seric return (NULL); 1338eea91d78Seric } 133915d084d5Seric 134038ad259dSeric /* found a match -- copy out */ 134100b385a9Seric cp = map_rewrite(map, hp->h_name, strlen(hp->h_name), av); 1342eea91d78Seric s->s_namecanon.nc_stat = *statp = EX_OK; 134300b385a9Seric s->s_namecanon.nc_cname = newstr(cp); 134400b385a9Seric return cp; 134599f7cf32Seric } 1346e2f2f828Seric /* 1347e2f2f828Seric ** ANYNET_NTOA -- convert a network address to printable form. 1348e2f2f828Seric ** 1349e2f2f828Seric ** Parameters: 1350e2f2f828Seric ** sap -- a pointer to a sockaddr structure. 1351e2f2f828Seric ** 1352e2f2f828Seric ** Returns: 1353e2f2f828Seric ** A printable version of that sockaddr. 1354e2f2f828Seric */ 1355e2f2f828Seric 1356e2f2f828Seric char * 1357e2f2f828Seric anynet_ntoa(sap) 1358e2f2f828Seric register SOCKADDR *sap; 1359e2f2f828Seric { 1360e2f2f828Seric register char *bp; 1361e2f2f828Seric register char *ap; 1362e2f2f828Seric int l; 1363e387851eSeric static char buf[100]; 1364e2f2f828Seric 13658cb4653dSeric /* check for null/zero family */ 13668cb4653dSeric if (sap == NULL) 13678cb4653dSeric return "NULLADDR"; 13688cb4653dSeric if (sap->sa.sa_family == 0) 13698cb4653dSeric return "0"; 13708cb4653dSeric 1371e387851eSeric switch (sap->sa.sa_family) 1372e387851eSeric { 1373139b52c8Seric #ifdef NETUNIX 1374e387851eSeric case AF_UNIX: 1375c24cf5a4Seric if (sap->sunix.sun_path[0] != '\0') 1376c24cf5a4Seric sprintf(buf, "[UNIX: %.64s]", sap->sunix.sun_path); 1377e387851eSeric else 1378e387851eSeric sprintf(buf, "[UNIX: localhost]"); 1379e387851eSeric return buf; 1380e387851eSeric #endif 1381e387851eSeric 138283c1f4bcSeric #ifdef NETINET 1383e387851eSeric case AF_INET: 1384*482e28bcSeric return inet_ntoa(sap->sin.sin_addr); 138583c1f4bcSeric #endif 1386e2f2f828Seric 1387e387851eSeric default: 1388e387851eSeric /* this case is only to ensure syntactic correctness */ 1389e387851eSeric break; 1390e387851eSeric } 1391e387851eSeric 1392e2f2f828Seric /* unknown family -- just dump bytes */ 139383c1f4bcSeric (void) sprintf(buf, "Family %d: ", sap->sa.sa_family); 1394e2f2f828Seric bp = &buf[strlen(buf)]; 139583c1f4bcSeric ap = sap->sa.sa_data; 139683c1f4bcSeric for (l = sizeof sap->sa.sa_data; --l >= 0; ) 1397e2f2f828Seric { 1398e2f2f828Seric (void) sprintf(bp, "%02x:", *ap++ & 0377); 1399e2f2f828Seric bp += 3; 1400e2f2f828Seric } 1401e2f2f828Seric *--bp = '\0'; 1402e2f2f828Seric return buf; 1403e2f2f828Seric } 14049f8b0eadSeric /* 14059f8b0eadSeric ** HOSTNAMEBYANYADDR -- return name of host based on address 14069f8b0eadSeric ** 14079f8b0eadSeric ** Parameters: 14089f8b0eadSeric ** sap -- SOCKADDR pointer 14099f8b0eadSeric ** 14109f8b0eadSeric ** Returns: 14119f8b0eadSeric ** text representation of host name. 14129f8b0eadSeric ** 14139f8b0eadSeric ** Side Effects: 14149f8b0eadSeric ** none. 14159f8b0eadSeric */ 14169f8b0eadSeric 14179f8b0eadSeric char * 14189f8b0eadSeric hostnamebyanyaddr(sap) 14199f8b0eadSeric register SOCKADDR *sap; 14209f8b0eadSeric { 14219f8b0eadSeric register struct hostent *hp; 14223490b9dfSeric int saveretry; 14233490b9dfSeric 14249d4a8008Seric #if NAMED_BIND 14253490b9dfSeric /* shorten name server timeout to avoid higher level timeouts */ 14263490b9dfSeric saveretry = _res.retry; 14273490b9dfSeric _res.retry = 3; 14283490b9dfSeric #endif /* NAMED_BIND */ 14293490b9dfSeric 14309f8b0eadSeric switch (sap->sa.sa_family) 14319f8b0eadSeric { 14329f8b0eadSeric #ifdef NETINET 14339f8b0eadSeric case AF_INET: 14348b212fe0Seric hp = sm_gethostbyaddr((char *) &sap->sin.sin_addr, 14358b212fe0Seric INADDRSZ, 14369f8b0eadSeric AF_INET); 14379f8b0eadSeric break; 14389f8b0eadSeric #endif 14399f8b0eadSeric 14409f8b0eadSeric #ifdef NETISO 14419f8b0eadSeric case AF_ISO: 14428b212fe0Seric hp = sm_gethostbyaddr((char *) &sap->siso.siso_addr, 14439f8b0eadSeric sizeof sap->siso.siso_addr, 14449f8b0eadSeric AF_ISO); 14459f8b0eadSeric break; 14469f8b0eadSeric #endif 14479f8b0eadSeric 1448e387851eSeric case AF_UNIX: 1449e387851eSeric hp = NULL; 1450e387851eSeric break; 1451e387851eSeric 14529f8b0eadSeric default: 14538b212fe0Seric hp = sm_gethostbyaddr(sap->sa.sa_data, 14549f8b0eadSeric sizeof sap->sa.sa_data, 14559f8b0eadSeric sap->sa.sa_family); 14569f8b0eadSeric break; 14579f8b0eadSeric } 14589f8b0eadSeric 14599d4a8008Seric #if NAMED_BIND 14603490b9dfSeric _res.retry = saveretry; 14613490b9dfSeric #endif /* NAMED_BIND */ 14623490b9dfSeric 14639f8b0eadSeric if (hp != NULL) 14649f8b0eadSeric return hp->h_name; 14659f8b0eadSeric else 14669f8b0eadSeric { 14679f8b0eadSeric /* produce a dotted quad */ 14689f8b0eadSeric static char buf[512]; 14699f8b0eadSeric 14709f8b0eadSeric (void) sprintf(buf, "[%s]", anynet_ntoa(sap)); 14719f8b0eadSeric return buf; 14729f8b0eadSeric } 14739f8b0eadSeric } 1474f36ede03Sbostic 14756c2c3107Seric # else /* DAEMON */ 147699f7cf32Seric /* code for systems without sophisticated networking */ 1477444eaf03Seric 1478444eaf03Seric /* 1479444eaf03Seric ** MYHOSTNAME -- stub version for case of no daemon code. 148021e9914dSeric ** 148121e9914dSeric ** Can't convert to upper case here because might be a UUCP name. 1482897f1869Seric ** 1483897f1869Seric ** Mark, you can change this to be anything you want...... 1484444eaf03Seric */ 1485444eaf03Seric 1486444eaf03Seric char ** 1487897f1869Seric myhostname(hostbuf, size) 1488444eaf03Seric char hostbuf[]; 1489897f1869Seric int size; 1490444eaf03Seric { 1491444eaf03Seric register FILE *f; 1492444eaf03Seric 1493444eaf03Seric hostbuf[0] = '\0'; 1494444eaf03Seric f = fopen("/usr/include/whoami", "r"); 1495444eaf03Seric if (f != NULL) 1496444eaf03Seric { 1497897f1869Seric (void) fgets(hostbuf, size, f); 1498444eaf03Seric fixcrlf(hostbuf, TRUE); 1499444eaf03Seric (void) fclose(f); 1500444eaf03Seric } 1501444eaf03Seric return (NULL); 1502444eaf03Seric } 150399f7cf32Seric /* 15049f8b0eadSeric ** GETAUTHINFO -- get the real host name asociated with a file descriptor 1505320e0d1cSeric ** 1506320e0d1cSeric ** Parameters: 1507320e0d1cSeric ** fd -- the descriptor 1508320e0d1cSeric ** 1509320e0d1cSeric ** Returns: 1510320e0d1cSeric ** The host name associated with this descriptor, if it can 1511320e0d1cSeric ** be determined. 1512320e0d1cSeric ** NULL otherwise. 1513320e0d1cSeric ** 1514320e0d1cSeric ** Side Effects: 1515320e0d1cSeric ** none 1516320e0d1cSeric */ 1517320e0d1cSeric 1518320e0d1cSeric char * 15199f8b0eadSeric getauthinfo(fd) 1520320e0d1cSeric int fd; 1521320e0d1cSeric { 1522320e0d1cSeric return NULL; 1523320e0d1cSeric } 1524320e0d1cSeric /* 152599f7cf32Seric ** MAPHOSTNAME -- turn a hostname into canonical form 152699f7cf32Seric ** 152799f7cf32Seric ** Parameters: 152805b57da8Seric ** map -- a pointer to the database map. 152908de856eSeric ** name -- a buffer containing a hostname. 153015d084d5Seric ** avp -- a pointer to a (cf file defined) argument vector. 15312d29d43aSeric ** statp -- an exit status (out parameter). 153299f7cf32Seric ** 153399f7cf32Seric ** Returns: 153415d084d5Seric ** mapped host name 1535cb452edcSeric ** FALSE otherwise. 153699f7cf32Seric ** 153799f7cf32Seric ** Side Effects: 153808de856eSeric ** Looks up the host specified in name. If it is not 153999f7cf32Seric ** the canonical name for that host, replace it with 154099f7cf32Seric ** the canonical name. If the name is unknown, or it 154199f7cf32Seric ** is already the canonical name, leave it unchanged. 154299f7cf32Seric */ 154399f7cf32Seric 154499f7cf32Seric /*ARGSUSED*/ 154515d084d5Seric char * 154608de856eSeric host_map_lookup(map, name, avp, statp) 154705b57da8Seric MAP *map; 154808de856eSeric char *name; 154915d084d5Seric char **avp; 15502d29d43aSeric char *statp; 155199f7cf32Seric { 15522d29d43aSeric register struct hostent *hp; 15532d29d43aSeric 15548b212fe0Seric hp = sm_gethostbyname(name); 15552d29d43aSeric if (hp != NULL) 15562d29d43aSeric return hp->h_name; 15572d29d43aSeric *statp = EX_NOHOST; 155815d084d5Seric return NULL; 155999f7cf32Seric } 156099f7cf32Seric 15616c2c3107Seric #endif /* DAEMON */ 1562