+ /*
+ ** CHILD -- return to caller.
+ ** Collect verified idea of sending host.
+ ** Verify calling user id if possible here.
+ */
+
+ (void) setsignal(SIGCHLD, SIG_DFL);
+ (void) setsignal(SIGHUP, intsig);
+ (void) close(DaemonSocket);
+ DisConnected = FALSE;
+
+ setproctitle("startup with %s",
+ anynet_ntoa(&RealHostAddr));
+
+ /* determine host name */
+ p = hostnamebyanyaddr(&RealHostAddr);
+ if (strlen(p) > MAXNAME)
+ p[MAXNAME] = '\0';
+ RealHostName = newstr(p);
+ setproctitle("startup with %s", p);
+
+ if ((InChannel = fdopen(t, "r")) == NULL ||
+ (t = dup(t)) < 0 ||
+ (OutChannel = fdopen(t, "w")) == NULL)
+ {
+ syserr("cannot open SMTP server channel, fd=%d", t);
+ exit(0);
+ }
+
+ /* should we check for illegal connection here? XXX */
+#ifdef XLA
+ if (!xla_host_ok(RealHostName))
+ {
+ message("421 Too many SMTP sessions for this host");
+ exit(0);
+ }
+#endif
+
+ if (tTd(15, 2))
+ printf("getreq: returning\n");
+ return;
+ }
+
+ CurChildren++;
+
+ /* close the port so that others will hang (for a while) */
+ (void) close(t);
+ }
+ /*NOTREACHED*/
+}
+\f/*
+** OPENDAEMONSOCKET -- open the SMTP socket
+**
+** Deals with setting all appropriate options. DaemonAddr must
+** be set up in advance.
+**
+** Parameters:
+** firsttime -- set if this is the initial open.
+**
+** Returns:
+** Size in bytes of the daemon socket addr.
+**
+** Side Effects:
+** Leaves DaemonSocket set to the open socket.
+** Exits if the socket cannot be created.
+*/
+
+#define MAXOPENTRIES 10 /* maximum number of tries to open connection */
+
+int
+opendaemonsocket(firsttime)
+ bool firsttime;
+{
+ int on = 1;
+ int socksize = 0;
+ int ntries = 0;
+ int saveerrno;
+
+ if (tTd(15, 2))
+ printf("opendaemonsocket()\n");
+
+ do
+ {
+ if (ntries > 0)
+ sleep(5);
+ if (firsttime || DaemonSocket < 0)
+ {
+ DaemonSocket = socket(DaemonAddr.sa.sa_family, SOCK_STREAM, 0);
+ if (DaemonSocket < 0)
+ {
+ /* probably another daemon already */
+ saveerrno = errno;
+ syserr("opendaemonsocket: can't create server SMTP socket");
+ severe:
+# ifdef LOG
+ if (LogLevel > 0)
+ syslog(LOG_ALERT, "problem creating SMTP socket");
+# endif /* LOG */
+ DaemonSocket = -1;
+ continue;
+ }
+
+ /* turn on network debugging? */
+ if (tTd(15, 101))
+ (void) setsockopt(DaemonSocket, SOL_SOCKET,
+ SO_DEBUG, (char *)&on,
+ sizeof on);
+
+ (void) setsockopt(DaemonSocket, SOL_SOCKET,
+ SO_REUSEADDR, (char *)&on, sizeof on);
+ (void) setsockopt(DaemonSocket, SOL_SOCKET,
+ SO_KEEPALIVE, (char *)&on, sizeof on);
+
+#ifdef SO_RCVBUF
+ if (TcpRcvBufferSize > 0)
+ {
+ if (setsockopt(DaemonSocket, SOL_SOCKET,
+ SO_RCVBUF,
+ (char *) &TcpRcvBufferSize,
+ sizeof(TcpRcvBufferSize)) < 0)
+ syserr("getrequests: setsockopt(SO_RCVBUF)");
+ }
+#endif
+
+ switch (DaemonAddr.sa.sa_family)
+ {
+# if NETINET
+ case AF_INET:
+ socksize = sizeof DaemonAddr.sin;
+ break;
+# endif
+
+# if NETISO
+ case AF_ISO:
+ socksize = sizeof DaemonAddr.siso;
+ break;
+# endif
+
+ default:
+ socksize = sizeof DaemonAddr;
+ break;
+ }
+
+ if (bind(DaemonSocket, &DaemonAddr.sa, socksize) < 0)
+ {
+ saveerrno = errno;
+ syserr("getrequests: cannot bind");
+ (void) close(DaemonSocket);
+ goto severe;
+ }
+ }
+ if (!firsttime && listen(DaemonSocket, ListenQueueSize) < 0)
+ {
+ saveerrno = errno;
+ syserr("getrequests: cannot listen");
+ (void) close(DaemonSocket);
+ goto severe;
+ }
+ return socksize;
+ } while (ntries++ < MAXOPENTRIES && transienterror(saveerrno));
+ syserr("!opendaemonsocket: server SMTP socket wedged: exiting");
+ finis();
+}
+\f/*
+** CLRDAEMON -- reset the daemon connection
+**
+** Parameters:
+** none.
+**
+** Returns:
+** none.
+**
+** Side Effects:
+** releases any resources used by the passive daemon.
+*/
+
+void
+clrdaemon()
+{
+ if (DaemonSocket >= 0)
+ (void) close(DaemonSocket);
+ DaemonSocket = -1;
+}
+\f/*
+** SETDAEMONOPTIONS -- set options for running the daemon
+**
+** Parameters:
+** p -- the options line.
+**
+** Returns:
+** none.
+*/
+
+void
+setdaemonoptions(p)
+ register char *p;
+{
+ if (DaemonAddr.sa.sa_family == AF_UNSPEC)
+ DaemonAddr.sa.sa_family = AF_INET;
+
+ while (p != NULL)
+ {
+ register char *f;
+ register char *v;
+
+ while (isascii(*p) && isspace(*p))
+ p++;
+ if (*p == '\0')
+ break;
+ f = p;
+ p = strchr(p, ',');
+ if (p != NULL)
+ *p++ = '\0';
+ v = strchr(f, '=');
+ if (v == NULL)
+ continue;
+ while (isascii(*++v) && isspace(*v))
+ continue;
+ if (isascii(*f) && isupper(*f))
+ *f = tolower(*f);
+
+ switch (*f)
+ {
+ case 'F': /* address family */
+ if (isascii(*v) && isdigit(*v))
+ DaemonAddr.sa.sa_family = atoi(v);
+#if NETINET
+ else if (strcasecmp(v, "inet") == 0)
+ DaemonAddr.sa.sa_family = AF_INET;
+#endif
+#if NETISO
+ else if (strcasecmp(v, "iso") == 0)
+ DaemonAddr.sa.sa_family = AF_ISO;
+#endif
+#if NETNS
+ else if (strcasecmp(v, "ns") == 0)
+ DaemonAddr.sa.sa_family = AF_NS;
+#endif
+#if NETX25
+ else if (strcasecmp(v, "x.25") == 0)
+ DaemonAddr.sa.sa_family = AF_CCITT;
+#endif
+ else
+ syserr("554 Unknown address family %s in Family=option", v);
+ break;
+
+ case 'A': /* address */
+ switch (DaemonAddr.sa.sa_family)
+ {
+#if NETINET
+ case AF_INET:
+ if (isascii(*v) && isdigit(*v))
+ DaemonAddr.sin.sin_addr.s_addr = htonl(inet_network(v));
+ else
+ {
+ register struct netent *np;
+
+ np = getnetbyname(v);
+ if (np == NULL)
+ syserr("554 network \"%s\" unknown", v);
+ else
+ DaemonAddr.sin.sin_addr.s_addr = np->n_net;
+ }
+ break;
+#endif
+
+ default:
+ syserr("554 Address= option unsupported for family %d",
+ DaemonAddr.sa.sa_family);
+ break;
+ }
+ break;
+
+ case 'P': /* port */
+ switch (DaemonAddr.sa.sa_family)
+ {
+ short port;
+
+#if NETINET
+ case AF_INET:
+ if (isascii(*v) && isdigit(*v))
+ DaemonAddr.sin.sin_port = htons(atoi(v));
+ else
+ {
+ register struct servent *sp;
+
+ sp = getservbyname(v, "tcp");
+ if (sp == NULL)
+ syserr("554 service \"%s\" unknown", v);
+ else
+ DaemonAddr.sin.sin_port = sp->s_port;
+ }
+ break;
+#endif
+
+#if NETISO
+ case AF_ISO:
+ /* assume two byte transport selector */
+ if (isascii(*v) && isdigit(*v))
+ port = htons(atoi(v));
+ else
+ {
+ register struct servent *sp;
+
+ sp = getservbyname(v, "tcp");
+ if (sp == NULL)
+ syserr("554 service \"%s\" unknown", v);
+ else
+ port = sp->s_port;
+ }
+ bcopy((char *) &port, TSEL(&DaemonAddr.siso), 2);
+ break;
+#endif
+
+ default:
+ syserr("554 Port= option unsupported for family %d",
+ DaemonAddr.sa.sa_family);
+ break;
+ }
+ break;
+
+ case 'L': /* listen queue size */
+ ListenQueueSize = atoi(v);
+ break;
+
+ case 'S': /* send buffer size */
+ TcpSndBufferSize = atoi(v);
+ break;
+
+ case 'R': /* receive buffer size */
+ TcpRcvBufferSize = atoi(v);
+ break;
+
+ default:
+ syserr("554 DaemonPortOptions parameter \"%s\" unknown", f);
+ }
+ }
projects / unix-history / blobdiff