daemon.c
上传用户:xu_441
上传日期:2007-01-04
资源大小:1640k
文件大小:72k
- /*
- * Copyright (c) 1998, 1999 Sendmail, Inc. and its suppliers.
- * All rights reserved.
- * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the sendmail distribution.
- *
- */
- #include <sendmail.h>
- #ifndef lint
- # ifdef DAEMON
- static char id[] = "@(#)$Id: daemon.c,v 8.387 1999/12/03 03:40:28 gshapiro Exp $ (with daemon mode)";
- # else /* DAEMON */
- static char id[] = "@(#)$Id: daemon.c,v 8.387 1999/12/03 03:40:28 gshapiro Exp $ (without daemon mode)";
- # endif /* DAEMON */
- #endif /* ! lint */
- #if defined(SOCK_STREAM) || defined(__GNU_LIBRARY__)
- # define USE_SOCK_STREAM 1
- #endif /* defined(SOCK_STREAM) || defined(__GNU_LIBRARY__) */
- #if DAEMON || defined(USE_SOCK_STREAM)
- # if NETINET || NETINET6
- # include <arpa/inet.h>
- # endif /* NETINET || NETINET6 */
- # if NAMED_BIND
- # ifndef NO_DATA
- # define NO_DATA NO_ADDRESS
- # endif /* ! NO_DATA */
- # endif /* NAMED_BIND */
- #endif /* DAEMON || defined(USE_SOCK_STREAM) */
- #if DAEMON
- # include <sys/time.h>
- # if IP_SRCROUTE && NETINET
- # include <netinet/in_systm.h>
- # include <netinet/ip.h>
- # if HAS_IN_H
- # include <netinet/in.h>
- # ifndef IPOPTION
- # define IPOPTION ip_opts
- # define IP_LIST ip_opts
- # define IP_DST ip_dst
- # endif /* ! IPOPTION */
- # else /* HAS_IN_H */
- # include <netinet/ip_var.h>
- # ifndef IPOPTION
- # define IPOPTION ipoption
- # define IP_LIST ipopt_list
- # define IP_DST ipopt_dst
- # endif /* ! IPOPTION */
- # endif /* HAS_IN_H */
- # endif /* IP_SRCROUTE && NETINET */
- /* structure to describe a daemon */
- struct daemon
- {
- int d_socket; /* fd for socket */
- SOCKADDR d_addr; /* socket for incoming */
- u_short d_port; /* port number */
- int d_listenqueue; /* size of listen queue */
- int d_tcprcvbufsize; /* size of TCP receive buffer */
- int d_tcpsndbufsize; /* size of TCP send buffer */
- time_t d_refuse_connections_until;
- bool d_firsttime;
- int d_socksize;
- BITMAP256 d_flags; /* flags; see sendmail.h */
- char * d_mflags; /* flags for use in macro */
- char * d_name; /* user-supplied name */
- };
- typedef struct daemon DAEMON_T;
- static void connecttimeout __P((void));
- static int opendaemonsocket __P((struct daemon *, bool));
- static u_short setupdaemon __P((SOCKADDR *));
- /*
- ** DAEMON.C -- routines to use when running as a daemon.
- **
- ** This entire file is highly dependent on the 4.2 BSD
- ** interprocess communication primitives. No attempt has
- ** been made to make this file portable to Version 7,
- ** Version 6, MPX files, etc. If you should try such a
- ** thing yourself, I recommend chucking the entire file
- ** and starting from scratch. Basic semantics are:
- **
- ** getrequests(e)
- ** Opens a port and initiates a connection.
- ** Returns in a child. Must set InChannel and
- ** OutChannel appropriately.
- ** clrdaemon()
- ** Close any open files associated with getting
- ** the connection; this is used when running the queue,
- ** etc., to avoid having extra file descriptors during
- ** the queue run and to avoid confusing the network
- ** code (if it cares).
- ** makeconnection(host, port, outfile, infile, e)
- ** Make a connection to the named host on the given
- ** port. Set *outfile and *infile to the files
- ** appropriate for communication. Returns zero on
- ** success, else an exit status describing the
- ** error.
- ** host_map_lookup(map, hbuf, avp, pstat)
- ** Convert the entry in hbuf into a canonical form.
- */
- static DAEMON_T Daemons[MAXDAEMONS];
- static int ndaemons = 0; /* actual number of daemons */
- /* options for client */
- static int TcpRcvBufferSize = 0; /* size of TCP receive buffer */
- static int TcpSndBufferSize = 0; /* size of TCP send buffer */
- /*
- ** GETREQUESTS -- open mail IPC port and get requests.
- **
- ** Parameters:
- ** e -- the current envelope.
- **
- ** Returns:
- ** pointer to flags.
- **
- ** Side Effects:
- ** Waits until some interesting activity occurs. When
- ** it does, a child is created to process it, and the
- ** parent waits for completion. Return from this
- ** routine is always in the child. The file pointers
- ** "InChannel" and "OutChannel" should be set to point
- ** to the communication channel.
- */
- BITMAP256 *
- getrequests(e)
- ENVELOPE *e;
- {
- int t;
- time_t last_disk_space_check = 0;
- int idx, curdaemon = -1;
- # if XDEBUG
- bool j_has_dot;
- # endif /* XDEBUG */
- char status[MAXLINE];
- SOCKADDR sa;
- SOCKADDR_LEN_T len = sizeof sa;
- # if NETUNIX
- extern int ControlSocket;
- # endif /* NETUNIX */
- extern ENVELOPE BlankEnvelope;
- #define D(x,idx) x[idx]
- for (idx = 0; idx < ndaemons; idx++)
- {
- Daemons[idx].d_port = setupdaemon(&(Daemons[idx].d_addr));
- Daemons[idx].d_firsttime = TRUE;
- Daemons[idx].d_refuse_connections_until = (time_t) 0;
- }
- /*
- ** Try to actually open the connection.
- */
- if (tTd(15, 1))
- {
- for (idx = 0; idx < ndaemons; idx++)
- dprintf("getrequests: daemon %s: port %dn",
- Daemons[idx].d_name,
- ntohs(Daemons[idx].d_port));
- }
- /* get a socket for the SMTP connection */
- for (idx = 0; idx < ndaemons; idx++)
- Daemons[idx].d_socksize = opendaemonsocket(&Daemons[idx], TRUE);
- if (opencontrolsocket() < 0)
- sm_syslog(LOG_WARNING, NOQID,
- "daemon could not open control socket %s: %s",
- ControlSocketName, errstring(errno));
- (void) setsignal(SIGCHLD, reapchild);
- /* write the pid to file */
- log_sendmail_pid(e);
- # if XDEBUG
- {
- char jbuf[MAXHOSTNAMELEN];
- expand("201j", jbuf, sizeof jbuf, e);
- j_has_dot = strchr(jbuf, '.') != NULL;
- }
- # endif /* XDEBUG */
- /* Add parent process as first item */
- proc_list_add(getpid(), "Sendmail daemon", PROC_DAEMON);
- if (tTd(15, 1))
- {
- for (idx = 0; idx < ndaemons; idx++)
- dprintf("getrequests: daemon %s: %dn",
- Daemons[idx].d_name,
- Daemons[idx].d_socket);
- }
- for (;;)
- {
- register pid_t pid;
- auto SOCKADDR_LEN_T lotherend;
- bool timedout = FALSE;
- bool control = FALSE;
- int save_errno;
- int pipefd[2];
- /* see if we are rejecting connections */
- (void) blocksignal(SIGALRM);
- for (idx = 0; idx < ndaemons; idx++)
- {
- if (curtime() < Daemons[idx].d_refuse_connections_until)
- continue;
- if (refuseconnections(Daemons[idx].d_name, e, idx))
- {
- if (Daemons[idx].d_socket >= 0)
- {
- /* close socket so peer fails quickly */
- (void) close(Daemons[idx].d_socket);
- Daemons[idx].d_socket = -1;
- }
- /* refuse connections for next 15 seconds */
- Daemons[idx].d_refuse_connections_until = curtime() + 15;
- }
- else if (Daemons[idx].d_socket < 0 ||
- Daemons[idx].d_firsttime)
- {
- if (!Daemons[idx].d_firsttime && LogLevel >= 9)
- sm_syslog(LOG_INFO, NOQID,
- "accepting connections again for daemon %s",
- Daemons[idx].d_name);
- /* arrange to (re)open the socket if needed */
- (void) opendaemonsocket(&Daemons[idx], FALSE);
- Daemons[idx].d_firsttime = FALSE;
- }
- }
- if (curtime() >= last_disk_space_check)
- {
- if (!enoughdiskspace(MinBlocksFree + 1, FALSE))
- {
- if (!bitnset(D_ETRNONLY, Daemons[idx].d_flags))
- {
- /* log only if not logged before */
- if (LogLevel >= 9)
- sm_syslog(LOG_INFO, NOQID,
- "rejecting new messages: min free: %d",
- MinBlocksFree);
- sm_setproctitle(TRUE, e,
- "rejecting new messages: min free: %d",
- MinBlocksFree);
- setbitn(D_ETRNONLY, Daemons[idx].d_flags);
- }
- }
- else if (bitnset(D_ETRNONLY, Daemons[idx].d_flags))
- {
- /* log only if not logged before */
- if (LogLevel >= 9)
- sm_syslog(LOG_INFO, NOQID,
- "accepting new messages (again)");
- /* title will be set below */
- clrbitn(D_ETRNONLY, Daemons[idx].d_flags);
- }
- /* only check disk space once a minute */
- last_disk_space_check = curtime() + 60;
- }
- # if XDEBUG
- /* check for disaster */
- {
- char jbuf[MAXHOSTNAMELEN];
- expand("201j", jbuf, sizeof jbuf, e);
- if (!wordinclass(jbuf, 'w'))
- {
- dumpstate("daemon lost $j");
- sm_syslog(LOG_ALERT, NOQID,
- "daemon process doesn't have $j in $=w; see syslog");
- abort();
- }
- else if (j_has_dot && strchr(jbuf, '.') == NULL)
- {
- dumpstate("daemon $j lost dot");
- sm_syslog(LOG_ALERT, NOQID,
- "daemon process $j lost dot; see syslog");
- abort();
- }
- }
- # endif /* XDEBUG */
- # if 0
- /*
- ** Andrew Sun <asun@ieps-sun.ml.com> claims that this will
- ** fix the SVr4 problem. But it seems to have gone away,
- ** so is it worth doing this?
- */
- if (DaemonSocket >= 0 &&
- SetNonBlocking(DaemonSocket, FALSE) < 0)
- log an error here;
- # endif /* 0 */
- (void) releasesignal(SIGALRM);
- for (;;)
- {
- int highest = -1;
- fd_set readfds;
- struct timeval timeout;
- FD_ZERO(&readfds);
- for (idx = 0; idx < ndaemons; idx++)
- {
- /* wait for a connection */
- if (Daemons[idx].d_socket >= 0)
- {
- if (!bitnset(D_ETRNONLY, Daemons[idx].d_flags))
- {
- sm_setproctitle(TRUE, e,
- "accepting connections");
- }
- if (Daemons[idx].d_socket > highest)
- highest = Daemons[idx].d_socket;
- FD_SET(Daemons[idx].d_socket, &readfds);
- }
- }
- # if NETUNIX
- if (ControlSocket >= 0)
- {
- if (ControlSocket > highest)
- highest = ControlSocket;
- FD_SET(ControlSocket, &readfds);
- }
- # endif /* NETUNIX */
- /*
- ** if one socket is closed, set the timeout
- ** to 5 seconds (so it might get reopened soon),
- ** otherwise (all sockets open) 60.
- */
- idx = 0;
- while (idx < ndaemons && Daemons[idx].d_socket >= 0)
- idx++;
- if (idx < ndaemons)
- timeout.tv_sec = 5;
- else
- timeout.tv_sec = 60;
- timeout.tv_usec = 0;
- t = select(highest + 1, FDSET_CAST &readfds,
- NULL, NULL, &timeout);
- if (DoQueueRun)
- (void) runqueue(TRUE, FALSE);
- if (t <= 0)
- {
- timedout = TRUE;
- break;
- }
- control = FALSE;
- errno = 0;
- curdaemon = -1;
- for (idx = 0; idx < ndaemons; idx++)
- {
- if (Daemons[idx].d_socket >= 0 &&
- FD_ISSET(Daemons[idx].d_socket, &readfds))
- {
- lotherend = Daemons[idx].d_socksize;
- t = accept(Daemons[idx].d_socket,
- (struct sockaddr *)&RealHostAddr,
- &lotherend);
- curdaemon = idx;
- }
- }
- # if NETUNIX
- if (curdaemon == -1 && ControlSocket >= 0 &&
- FD_ISSET(ControlSocket, &readfds))
- {
- struct sockaddr_un sa_un;
- lotherend = sizeof sa_un;
- t = accept(ControlSocket,
- (struct sockaddr *)&sa_un,
- &lotherend);
- control = TRUE;
- }
- # endif /* NETUNIX */
- if (t >= 0 || errno != EINTR)
- break;
- }
- if (timedout)
- {
- timedout = FALSE;
- continue;
- }
- save_errno = errno;
- (void) blocksignal(SIGALRM);
- if (t < 0)
- {
- errno = save_errno;
- syserr("getrequests: accept");
- /* arrange to re-open the socket next time around */
- (void) close(Daemons[curdaemon].d_socket);
- Daemons[curdaemon].d_socket = -1;
- continue;
- }
- if (!control)
- {
- /* set some daemon related macros */
- switch (Daemons[curdaemon].d_addr.sa.sa_family)
- {
- case AF_UNSPEC:
- define(macid("{daemon_family}", NULL),
- "unspec", &BlankEnvelope);
- break;
- # if NETINET
- case AF_INET:
- define(macid("{daemon_family}", NULL),
- "inet", &BlankEnvelope);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- define(macid("{daemon_family}", NULL),
- "inet6", &BlankEnvelope);
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- define(macid("{daemon_family}", NULL),
- "iso", &BlankEnvelope);
- break;
- # endif /* NETISO */
- # if NETNS
- case AF_NS:
- define(macid("{daemon_family}", NULL),
- "ns", &BlankEnvelope);
- break;
- # endif /* NETNS */
- # if NETX25
- case AF_CCITT:
- define(macid("{daemon_family}", NULL),
- "x.25", &BlankEnvelope);
- break;
- # endif /* NETX25 */
- }
- define(macid("{daemon_name}", NULL),
- Daemons[curdaemon].d_name, &BlankEnvelope);
- define(macid("{daemon_addr}", NULL),
- newstr(anynet_ntoa(&Daemons[curdaemon].d_addr)),
- &BlankEnvelope);
- (void) snprintf(status, sizeof status, "%d",
- ntohs(Daemons[curdaemon].d_port));
- define(macid("{daemon_port}", NULL), newstr(status),
- &BlankEnvelope);
- if (Daemons[curdaemon].d_mflags != NULL)
- define(macid("{daemon_flags}", NULL),
- newstr(Daemons[curdaemon].d_mflags),
- &BlankEnvelope);
- else
- define(macid("{daemon_flags}", NULL),
- "", &BlankEnvelope);
- }
- /*
- ** Create a subprocess to process the mail.
- */
- if (tTd(15, 2))
- dprintf("getrequests: forking (fd = %d)n", t);
- /*
- ** Create a pipe to keep the child from writing to the
- ** socket until after the parent has closed it. Otherwise
- ** the parent may hang if the child has closed it first.
- */
- if (pipe(pipefd) < 0)
- pipefd[0] = pipefd[1] = -1;
- (void) blocksignal(SIGCHLD);
- pid = fork();
- if (pid < 0)
- {
- syserr("daemon: cannot fork");
- if (pipefd[0] != -1)
- {
- (void) close(pipefd[0]);
- (void) close(pipefd[1]);
- }
- (void) releasesignal(SIGCHLD);
- (void) sleep(10);
- (void) close(t);
- continue;
- }
- if (pid == 0)
- {
- char *p;
- FILE *inchannel, *outchannel = NULL;
- /*
- ** CHILD -- return to caller.
- ** Collect verified idea of sending host.
- ** Verify calling user id if possible here.
- */
- (void) releasesignal(SIGALRM);
- (void) releasesignal(SIGCHLD);
- (void) setsignal(SIGCHLD, SIG_DFL);
- (void) setsignal(SIGHUP, intsig);
- for (idx = 0; idx < ndaemons; idx++)
- {
- if (Daemons[idx].d_socket >= 0)
- (void) close(Daemons[idx].d_socket);
- }
- clrcontrol();
- /* Avoid SMTP daemon actions if control command */
- if (control)
- {
- /* Add control socket process */
- proc_list_add(getpid(), "console socket child",
- PROC_CONTROL_CHILD);
- }
- else
- {
- proc_list_clear();
- /* Add parent process as first child item */
- proc_list_add(getpid(), "daemon child",
- PROC_DAEMON_CHILD);
- /* don't schedule queue runs if ETRN */
- QueueIntvl = 0;
- sm_setproctitle(TRUE, e, "startup with %s",
- anynet_ntoa(&RealHostAddr));
- }
- if (pipefd[0] != -1)
- {
- auto char c;
- /*
- ** Wait for the parent to close the write end
- ** of the pipe, which we will see as an EOF.
- ** This guarantees that we won't write to the
- ** socket until after the parent has closed
- ** the pipe.
- */
- /* close the write end of the pipe */
- (void) close(pipefd[1]);
- /* we shouldn't be interrupted, but ... */
- while (read(pipefd[0], &c, 1) < 0 &&
- errno == EINTR)
- continue;
- (void) close(pipefd[0]);
- }
- /* control socket processing */
- if (control)
- {
- control_command(t, e);
- /* NOTREACHED */
- exit(EX_SOFTWARE);
- }
- /* determine host name */
- p = hostnamebyanyaddr(&RealHostAddr);
- if (strlen(p) > (SIZE_T) MAXNAME)
- p[MAXNAME] = ' ';
- RealHostName = newstr(p);
- if (RealHostName[0] == '[')
- {
- /* TEMP, FAIL: which one? */
- define(macid("{client_resolve}", NULL),
- (h_errno == TRY_AGAIN) ? "TEMP" : "FAIL",
- &BlankEnvelope);
- }
- else
- define(macid("{client_resolve}", NULL), "OK",
- &BlankEnvelope);
- sm_setproctitle(TRUE, e, "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);
- finis(FALSE, EX_OK);
- }
- InChannel = inchannel;
- OutChannel = outchannel;
- DisConnected = FALSE;
- # ifdef XLA
- if (!xla_host_ok(RealHostName))
- {
- message("421 4.4.5 Too many SMTP sessions for this host");
- finis(FALSE, EX_OK);
- }
- # endif /* XLA */
- /* find out name for interface of connection */
- if (getsockname(fileno(InChannel), &sa.sa,
- &len) == 0)
- {
- p = hostnamebyanyaddr(&sa);
- if (tTd(15, 9))
- dprintf("getreq: got name %sn", p);
- define(macid("{if_name}", NULL),
- newstr(p), &BlankEnvelope);
- /* do this only if it is not the loopback */
- /* interface: how to figure out? XXX */
- if (!isloopback(sa))
- {
- define(macid("{if_addr}", NULL),
- newstr(anynet_ntoa(&sa)),
- &BlankEnvelope);
- if (tTd(15, 7))
- dprintf("getreq: got addr %sn",
- macvalue(macid("{if_addr}", NULL),
- &BlankEnvelope));
- p = xalloc(5);
- snprintf(p, 4, "%d", sa.sa.sa_family);
- define(macid("{if_family}", NULL), p,
- &BlankEnvelope);
- }
- else
- {
- define(macid("{if_addr}", NULL), NULL,
- &BlankEnvelope);
- define(macid("{if_family}", NULL), NULL,
- &BlankEnvelope);
- }
- }
- else
- {
- if (tTd(15, 7))
- dprintf("getreq: getsockname failedn");
- define(macid("{if_name}", NULL), NULL,
- &BlankEnvelope);
- define(macid("{if_addr}", NULL), NULL,
- &BlankEnvelope);
- define(macid("{if_family}", NULL), NULL,
- &BlankEnvelope);
- }
- break;
- }
- /* parent -- keep track of children */
- if (control)
- {
- snprintf(status, sizeof status,
- "control socket server child");
- proc_list_add(pid, status, PROC_CONTROL);
- }
- else
- {
- snprintf(status, sizeof status,
- "SMTP server child for %s",
- anynet_ntoa(&RealHostAddr));
- proc_list_add(pid, status, PROC_DAEMON);
- }
- (void) releasesignal(SIGCHLD);
- /* close the read end of the synchronization pipe */
- if (pipefd[0] != -1)
- (void) close(pipefd[0]);
- /* close the port so that others will hang (for a while) */
- (void) close(t);
- /* release the child by closing the read end of the sync pipe */
- if (pipefd[1] != -1)
- (void) close(pipefd[1]);
- }
- if (tTd(15, 2))
- dprintf("getreq: returningn");
- return &Daemons[curdaemon].d_flags;
- }
- /*
- ** OPENDAEMONSOCKET -- open SMTP socket
- **
- ** Deals with setting all appropriate options.
- **
- ** Parameters:
- ** d -- the structure for the daemon to open.
- ** 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 */
- static int
- opendaemonsocket(d, firsttime)
- struct daemon *d;
- bool firsttime;
- {
- int on = 1;
- int fdflags;
- SOCKADDR_LEN_T socksize = 0;
- int ntries = 0;
- int save_errno;
- if (tTd(15, 2))
- dprintf("opendaemonsocket(%s)n", d->d_name);
- do
- {
- if (ntries > 0)
- (void) sleep(5);
- if (firsttime || d->d_socket < 0)
- {
- d->d_socket = socket(d->d_addr.sa.sa_family,
- SOCK_STREAM, 0);
- if (d->d_socket < 0)
- {
- save_errno = errno;
- syserr("opendaemonsocket: daemon %s: can't create server SMTP socket", d->d_name);
- severe:
- if (LogLevel > 0)
- sm_syslog(LOG_ALERT, NOQID,
- "daemon %s: problem creating SMTP socket", d->d_name);
- d->d_socket = -1;
- continue;
- }
- /* turn on network debugging? */
- if (tTd(15, 101))
- (void) setsockopt(d->d_socket, SOL_SOCKET,
- SO_DEBUG, (char *)&on,
- sizeof on);
- (void) setsockopt(d->d_socket, SOL_SOCKET,
- SO_REUSEADDR, (char *)&on, sizeof on);
- (void) setsockopt(d->d_socket, SOL_SOCKET,
- SO_KEEPALIVE, (char *)&on, sizeof on);
- # ifdef SO_RCVBUF
- if (d->d_tcprcvbufsize > 0)
- {
- if (setsockopt(d->d_socket, SOL_SOCKET,
- SO_RCVBUF,
- (char *) &d->d_tcprcvbufsize,
- sizeof(d->d_tcprcvbufsize)) < 0)
- syserr("opendaemonsocket: daemon %s: setsockopt(SO_RCVBUF)", d->d_name);
- }
- # endif /* SO_RCVBUF */
- # ifdef SO_SNDBUF
- if (d->d_tcpsndbufsize > 0)
- {
- if (setsockopt(d->d_socket, SOL_SOCKET,
- SO_SNDBUF,
- (char *) &d->d_tcpsndbufsize,
- sizeof(d->d_tcpsndbufsize)) < 0)
- syserr("opendaemonsocket: daemon %s: setsockopt(SO_SNDBUF)", d->d_name);
- }
- # endif /* SO_SNDBUF */
- if ((fdflags = fcntl(d->d_socket, F_GETFD, 0)) == -1 ||
- fcntl(d->d_socket, F_SETFD,
- fdflags | FD_CLOEXEC) == -1)
- {
- save_errno = errno;
- syserr("opendaemonsocket: daemon %s: failed to %s close-on-exec flag: %s",
- d->d_name,
- fdflags == -1 ? "get" : "set",
- strerror(save_errno));
- (void) close(d->d_socket);
- goto severe;
- }
- switch (d->d_addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- socksize = sizeof d->d_addr.sin;
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- socksize = sizeof d->d_addr.sin6;
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- socksize = sizeof d->d_addr.siso;
- break;
- # endif /* NETISO */
- default:
- socksize = sizeof d->d_addr;
- break;
- }
- if (bind(d->d_socket, &d->d_addr.sa, socksize) < 0)
- {
- /* probably another daemon already */
- save_errno = errno;
- syserr("opendaemonsocket: daemon %s: cannot bind",
- d->d_name);
- (void) close(d->d_socket);
- goto severe;
- }
- }
- if (!firsttime &&
- listen(d->d_socket, d->d_listenqueue) < 0)
- {
- save_errno = errno;
- syserr("opendaemonsocket: daemon %s: cannot listen",
- d->d_name);
- (void) close(d->d_socket);
- goto severe;
- }
- return socksize;
- } while (ntries++ < MAXOPENTRIES && transienterror(save_errno));
- syserr("!opendaemonsocket: daemon %s: server SMTP socket wedged: exiting",
- d->d_name);
- /* NOTREACHED */
- return -1; /* avoid compiler warning on IRIX */
- }
- /*
- ** SETUPDAEMON -- setup socket for daemon
- **
- ** Parameters:
- ** daemonaddr -- socket for daemon
- ** daemon -- number of daemon
- **
- ** Returns:
- ** port number on which daemon should run
- **
- */
- static u_short
- setupdaemon(daemonaddr)
- SOCKADDR *daemonaddr;
- {
- u_short port;
- /*
- ** Set up the address for the mailer.
- */
- if (daemonaddr->sa.sa_family == AF_UNSPEC)
- {
- memset(daemonaddr, ' ', sizeof *daemonaddr);
- daemonaddr->sa.sa_family = InetMode;
- }
- switch (daemonaddr->sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (daemonaddr->sin.sin_addr.s_addr == 0)
- daemonaddr->sin.sin_addr.s_addr = INADDR_ANY;
- port = daemonaddr->sin.sin_port;
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (IN6_IS_ADDR_UNSPECIFIED(&daemonaddr->sin6.sin6_addr))
- daemonaddr->sin6.sin6_addr = in6addr_any;
- port = daemonaddr->sin6.sin6_port;
- break;
- # endif /* NETINET6 */
- default:
- /* unknown protocol */
- port = 0;
- break;
- }
- if (port == 0)
- {
- # ifdef NO_GETSERVBYNAME
- port = htons(25);
- # else /* NO_GETSERVBYNAME */
- {
- register struct servent *sp;
- sp = getservbyname("smtp", "tcp");
- if (sp == NULL)
- {
- syserr("554 5.3.5 service "smtp" unknown");
- port = htons(25);
- }
- else
- port = sp->s_port;
- }
- # endif /* NO_GETSERVBYNAME */
- }
- switch (daemonaddr->sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- daemonaddr->sin.sin_port = port;
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- daemonaddr->sin6.sin6_port = port;
- break;
- # endif /* NETINET6 */
- default:
- /* unknown protocol */
- break;
- }
- return(port);
- }
- /*
- ** CLRDAEMON -- reset the daemon connection
- **
- ** Parameters:
- ** none.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** releases any resources used by the passive daemon.
- */
- void
- clrdaemon()
- {
- int i;
- for (i = 0; i < ndaemons; i++)
- {
- if (Daemons[i].d_socket >= 0)
- (void) close(Daemons[i].d_socket);
- Daemons[i].d_socket = -1;
- }
- }
- /*
- ** SETSOCKADDROPTIONS -- set options for SOCKADDR (daemon or client)
- **
- ** Parameters:
- ** p -- the options line.
- ** d -- the daemon structure to fill in.
- **
- ** Returns:
- ** none.
- */
- static void
- setsockaddroptions(p, d)
- register char *p;
- struct daemon *d;
- {
- # if NETISO
- short port;
- # endif /* NETISO */
- int l;
- char *h, *flags;
- if (d->d_addr.sa.sa_family == AF_UNSPEC)
- d->d_addr.sa.sa_family = InetMode;
- while (p != NULL)
- {
- register char *f;
- register char *v;
- while (isascii(*p) && isspace(*p))
- p++;
- if (*p == ' ')
- break;
- f = p;
- p = strchr(p, ',');
- if (p != NULL)
- *p++ = ' ';
- v = strchr(f, '=');
- if (v == NULL)
- continue;
- while (isascii(*++v) && isspace(*v))
- continue;
- if (isascii(*f) && islower(*f))
- *f = toupper(*f);
- switch (*f)
- {
- case 'F': /* address family */
- if (isascii(*v) && isdigit(*v))
- d->d_addr.sa.sa_family = atoi(v);
- # if NETINET
- else if (strcasecmp(v, "inet") == 0)
- d->d_addr.sa.sa_family = AF_INET;
- # endif /* NETINET */
- # if NETINET6
- else if (strcasecmp(v, "inet6") == 0)
- d->d_addr.sa.sa_family = AF_INET6;
- # endif /* NETINET6 */
- # if NETISO
- else if (strcasecmp(v, "iso") == 0)
- d->d_addr.sa.sa_family = AF_ISO;
- # endif /* NETISO */
- # if NETNS
- else if (strcasecmp(v, "ns") == 0)
- d->d_addr.sa.sa_family = AF_NS;
- # endif /* NETNS */
- # if NETX25
- else if (strcasecmp(v, "x.25") == 0)
- d->d_addr.sa.sa_family = AF_CCITT;
- # endif /* NETX25 */
- else
- syserr("554 5.3.5 Unknown address family %s in Family=option",
- v);
- break;
- case 'A': /* address */
- switch (d->d_addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (!isascii(*v) || !isdigit(*v) ||
- ((d->d_addr.sin.sin_addr.s_addr = inet_addr(v)) == INADDR_NONE))
- {
- register struct hostent *hp;
- hp = sm_gethostbyname(v, AF_INET);
- if (hp == NULL)
- syserr("554 5.3.0 host "%s" unknown",
- v);
- else
- {
- while (*(hp->h_addr_list) &&
- hp->h_addrtype != AF_INET)
- hp->h_addr_list++;
- if (*(hp->h_addr_list) == NULL)
- syserr("554 5.3.0 host "%s" unknown",
- v);
- else
- memmove(&d->d_addr.sin.sin_addr,
- *(hp->h_addr_list),
- INADDRSZ);
- }
- }
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (!isascii(*v) || !isxdigit(*v) ||
- inet_pton(AF_INET6, v,
- &d->d_addr.sin6.sin6_addr) != 1)
- {
- register struct hostent *hp;
- hp = sm_gethostbyname(v, AF_INET6);
- if (hp == NULL)
- syserr("554 5.3.0 host "%s" unknown",
- v);
- else
- {
- while (*(hp->h_addr_list) &&
- hp->h_addrtype != AF_INET6)
- hp->h_addr_list++;
- if (*(hp->h_addr_list) == NULL)
- syserr("554 5.3.0 host "%s" unknown",
- v);
- else
- memmove(&d->d_addr.sin6.sin6_addr,
- *(hp->h_addr_list),
- IN6ADDRSZ);
- }
- }
- break;
- # endif /* NETINET6 */
- default:
- syserr("554 5.3.5 address= option unsupported for family %d",
- d->d_addr.sa.sa_family);
- break;
- }
- break;
- case 'P': /* port */
- switch (d->d_addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (isascii(*v) && isdigit(*v))
- d->d_addr.sin.sin_port = htons(atoi(v));
- else
- {
- # ifdef NO_GETSERVBYNAME
- syserr("554 5.3.5 invalid port number: %s",
- v);
- # else /* NO_GETSERVBYNAME */
- register struct servent *sp;
- sp = getservbyname(v, "tcp");
- if (sp == NULL)
- syserr("554 5.3.5 service "%s" unknown",
- v);
- else
- d->d_addr.sin.sin_port = sp->s_port;
- # endif /* NO_GETSERVBYNAME */
- }
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (isascii(*v) && isdigit(*v))
- d->d_addr.sin6.sin6_port = htons(atoi(v));
- else
- {
- # ifdef NO_GETSERVBYNAME
- syserr("554 5.3.5 invalid port number: %s",
- v);
- # else /* NO_GETSERVBYNAME */
- register struct servent *sp;
- sp = getservbyname(v, "tcp");
- if (sp == NULL)
- syserr("554 5.3.5 service "%s" unknown",
- v);
- else
- d->d_addr.sin6.sin6_port = sp->s_port;
- # endif /* NO_GETSERVBYNAME */
- }
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- /* assume two byte transport selector */
- if (isascii(*v) && isdigit(*v))
- port = htons(atoi(v));
- else
- {
- # ifdef NO_GETSERVBYNAME
- syserr("554 5.3.5 invalid port number: %s",
- v);
- # else /* NO_GETSERVBYNAME */
- register struct servent *sp;
- sp = getservbyname(v, "tcp");
- if (sp == NULL)
- syserr("554 5.3.5 service "%s" unknown",
- v);
- else
- port = sp->s_port;
- # endif /* NO_GETSERVBYNAME */
- }
- memmove(TSEL(&d->d_addr.siso),
- (char *) &port, 2);
- break;
- # endif /* NETISO */
- default:
- syserr("554 5.3.5 Port= option unsupported for family %d",
- d->d_addr.sa.sa_family);
- break;
- }
- break;
- case 'L': /* listen queue size */
- d->d_listenqueue = atoi(v);
- break;
- case 'M': /* modifiers (flags) */
- l = 3 * strlen(v) + 3;
- h = v;
- flags = xalloc(l);
- d->d_mflags = flags;
- for (; *h != ' '; h++)
- {
- if (!(isascii(*h) && isspace(*h)))
- {
- if (flags != d->d_mflags)
- *f++ = ' ';
- *flags++ = *h;
- if (isupper(*h))
- *flags++ = *h;
- }
- }
- *flags++ = ' ';
- for (; *v != ' '; v++)
- if (!(isascii(*v) && isspace(*v)))
- setbitn(*v, d->d_flags);
- break;
- case 'S': /* send buffer size */
- d->d_tcpsndbufsize = atoi(v);
- break;
- case 'R': /* receive buffer size */
- d->d_tcprcvbufsize = atoi(v);
- break;
- case 'N': /* name */
- d->d_name = v;
- break;
- default:
- syserr("554 5.3.5 PortOptions parameter "%s" unknown",
- f);
- }
- }
- }
- /*
- ** SETDAEMONOPTIONS -- set options for running the MTA daemon
- **
- ** Parameters:
- ** p -- the options line.
- **
- ** Returns:
- ** TRUE if successful, FALSE otherwise.
- */
- bool
- setdaemonoptions(p)
- register char *p;
- {
- if (ndaemons >= MAXDAEMONS)
- return FALSE;
- Daemons[ndaemons].d_socket = -1;
- Daemons[ndaemons].d_listenqueue = 10;
- clrbitmap(Daemons[ndaemons].d_flags);
- setsockaddroptions(p, &Daemons[ndaemons]);
- if (Daemons[ndaemons].d_name != NULL)
- Daemons[ndaemons].d_name = newstr(Daemons[ndaemons].d_name);
- else
- {
- char num[30];
- snprintf(num, sizeof num, "Daemon%d", ndaemons);
- Daemons[ndaemons].d_name = newstr(num);
- }
- if (tTd(37, 1))
- {
- dprintf("Daemon %s flags: ", Daemons[ndaemons].d_name);
- if (bitnset(D_ETRNONLY, Daemons[ndaemons].d_flags))
- dprintf("ETRNONLY ");
- if (bitnset(D_NOETRN, Daemons[ndaemons].d_flags))
- dprintf("NOETRN ");
- dprintf("n");
- }
- ++ndaemons;
- return TRUE;
- }
- /*
- ** INITDAEMON -- initialize daemon if not yet done.
- **
- ** Parameters:
- ** none
- **
- ** Returns:
- ** none
- **
- ** Side Effects:
- ** initializes structure for one daemon.
- */
- void
- initdaemon()
- {
- if (ndaemons == 0)
- {
- Daemons[ndaemons].d_socket = -1;
- Daemons[ndaemons].d_listenqueue = 10;
- Daemons[ndaemons].d_name = "Daemon0";
- ndaemons = 1;
- }
- }
- /*
- ** SETCLIENTOPTIONS -- set options for running the client
- **
- ** Parameters:
- ** p -- the options line.
- **
- ** Returns:
- ** none.
- */
- static SOCKADDR ClientAddr; /* address for client */
- void
- setclientoptions(p)
- register char *p;
- {
- struct daemon d;
- extern ENVELOPE BlankEnvelope;
- memset(&d, ' ', sizeof d);
- setsockaddroptions(p, &d);
- /* grab what we need */
- memcpy(&ClientAddr, &d.d_addr, sizeof ClientAddr);
- TcpSndBufferSize = d.d_tcpsndbufsize;
- TcpRcvBufferSize = d.d_tcprcvbufsize;
- if (d.d_mflags != NULL)
- define(macid("{client_flags}", NULL), d.d_mflags,
- &BlankEnvelope);
- else
- define(macid("{client_flags}", NULL), "", &BlankEnvelope);
- }
- /*
- ** MAKECONNECTION -- make a connection to an SMTP socket on a machine.
- **
- ** Parameters:
- ** host -- the name of the host.
- ** port -- the port number to connect to.
- ** mci -- a pointer to the mail connection information
- ** structure to be filled in.
- ** e -- the current envelope.
- **
- ** Returns:
- ** An exit code telling whether the connection could be
- ** made and if not why not.
- **
- ** Side Effects:
- ** none.
- */
- static jmp_buf CtxConnectTimeout;
- SOCKADDR CurHostAddr; /* address of current host */
- int
- makeconnection(host, port, mci, e)
- char *host;
- volatile u_int port;
- register MCI *mci;
- ENVELOPE *e;
- {
- register volatile int addrno = 0;
- register volatile int s;
- register struct hostent *volatile hp = (struct hostent *)NULL;
- SOCKADDR addr;
- SOCKADDR clt_addr;
- int save_errno = 0;
- volatile SOCKADDR_LEN_T addrlen;
- volatile bool firstconnect;
- EVENT *volatile ev = NULL;
- # if NETINET6
- volatile int family = AF_INET6;
- bool v6found = FALSE;
- # else /* NETINET6 */
- int family = AF_INET;
- # endif /* NETINET6 */
- SOCKADDR_LEN_T len;
- volatile SOCKADDR_LEN_T socksize = 0;
- volatile bool clt_bind = FALSE;
- BITMAP256 d_flags;
- char *p;
- extern ENVELOPE BlankEnvelope;
- /* retranslate ${daemon_flags} into bitmap */
- clrbitmap(d_flags);
- if ((p = macvalue(macid("{daemon_flags}", NULL), e)) != NULL)
- {
- for (; *p != ' '; p++)
- if (!(isascii(*p) && isspace(*p)))
- setbitn(*p, d_flags);
- }
- /* "add" ${client_flags} to bitmap */
- if ((p = macvalue(macid("{client_flags}", NULL), e)) != NULL)
- {
- for (; *p != ' '; p++)
- {
- /* look for just this one flag */
- if (*p == D_IFNHELO)
- {
- setbitn(*p, d_flags);
- break;
- }
- }
- }
- /* Set up the address for outgoing connection. */
- if (bitnset(D_BINDIF, d_flags) &&
- (p = macvalue(macid("{if_addr}", NULL), e)) != NULL)
- {
- char *f;
- memset(&clt_addr, ' ', sizeof clt_addr);
- /* XXX set all necessary values... */
- if ((f = macvalue(macid("{if_family}", NULL), e)) != NULL)
- clt_addr.sa.sa_family = atoi(f);
- else
- clt_addr.sa.sa_family = AF_INET;
- switch (clt_addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if ((clt_addr.sin.sin_addr.s_addr = inet_addr(p))
- != INADDR_NONE)
- {
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in);
- }
- else if (clt_addr.sin.sin_port != 0)
- {
- clt_addr.sin.sin_addr.s_addr = INADDR_ANY;
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in);
- }
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- f = strchr(p, ']');
- if (f != NULL)
- {
- *f = ' ';
- if (inet_pton(AF_INET6, p + 1,
- &clt_addr.sin6.sin6_addr) == 1)
- {
- *f = ']';
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in6);
- }
- }
- if (!clt_bind && clt_addr.sin6.sin6_port != 0)
- {
- if (IN6_IS_ADDR_UNSPECIFIED(&clt_addr.sin6.sin6_addr))
- clt_addr.sin6.sin6_addr = in6addr_any;
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in);
- }
- break;
- # endif /* NETINET6 */
- # if 0
- default:
- syserr("554 5.3.5 Address= option unsupported for family %d",
- clt_addr.sa.sa_family);
- break;
- # endif /* 0 */
- }
- }
- else
- {
- STRUCTCOPY(ClientAddr, clt_addr);
- switch (clt_addr.sa.sa_family)
- {
- case AF_UNSPEC:
- # if NETINET
- clt_addr.sa.sa_family = AF_INET;
- /* FALLTHROUGH */
- case AF_INET:
- if (clt_addr.sin.sin_addr.s_addr == 0)
- clt_addr.sin.sin_addr.s_addr = INADDR_ANY;
- else
- clt_bind = TRUE;
- if (clt_addr.sin.sin_port != 0)
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (IN6_IS_ADDR_UNSPECIFIED(&clt_addr.sin6.sin6_addr))
- clt_addr.sin6.sin6_addr = in6addr_any;
- else
- clt_bind = TRUE;
- socksize = sizeof (struct sockaddr_in6);
- if (clt_addr.sin6.sin6_port != 0)
- clt_bind = TRUE;
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- socksize = sizeof clt_addr.siso;
- clt_bind = TRUE;
- break;
- # endif /* NETISO */
- }
- }
- /*
- ** Set up the address for the mailer.
- ** Accept "[a.b.c.d]" syntax for host name.
- */
- # if NETINET6
- v4retry:
- # endif /* NETINET6 */
- # if NAMED_BIND
- h_errno = 0;
- # endif /* NAMED_BIND */
- errno = 0;
- memset(&CurHostAddr, ' ', sizeof CurHostAddr);
- memset(&addr, ' ', sizeof addr);
- SmtpPhase = mci->mci_phase = "initial connection";
- CurHostName = host;
- if (host[0] == '[')
- {
- p = strchr(host, ']');
- if (p != NULL)
- {
- # if NETINET
- unsigned long hid = INADDR_NONE;
- # endif /* NETINET */
- # if NETINET6
- struct sockaddr_in6 hid6;
- # endif /* NETINET6 */
- *p = ' ';
- # if NETINET6
- memset(&hid6, ' ', sizeof hid6);
- # endif /* NETINET6 */
- # if NETINET
- if (family == AF_INET &&
- (hid = inet_addr(&host[1])) != INADDR_NONE)
- {
- addr.sin.sin_family = AF_INET;
- addr.sin.sin_addr.s_addr = hid;
- }
- else
- # endif /* NETINET */
- # if NETINET6
- if (family == AF_INET6 &&
- inet_pton(AF_INET6, &host[1],
- &hid6.sin6_addr) == 1)
- {
- addr.sin6.sin6_family = AF_INET6;
- addr.sin6.sin6_addr = hid6.sin6_addr;
- }
- else
- # endif /* NETINET6 */
- {
- /* try it as a host name (avoid MX lookup) */
- hp = sm_gethostbyname(&host[1], family);
- if (hp == NULL && p[-1] == '.')
- {
- # if NAMED_BIND
- int oldopts = _res.options;
- _res.options &= ~(RES_DEFNAMES|RES_DNSRCH);
- # endif /* NAMED_BIND */
- p[-1] = ' ';
- hp = sm_gethostbyname(&host[1],
- family);
- p[-1] = '.';
- # if NAMED_BIND
- _res.options = oldopts;
- # endif /* NAMED_BIND */
- }
- *p = ']';
- goto gothostent;
- }
- *p = ']';
- }
- if (p == NULL)
- {
- extern char MsgBuf[];
- usrerrenh("5.1.2",
- "553 Invalid numeric domain spec "%s"",
- host);
- mci_setstat(mci, EX_NOHOST, "5.1.2", MsgBuf);
- errno = EINVAL;
- return EX_NOHOST;
- }
- }
- else
- {
- /* contortion to get around SGI cc complaints */
- {
- p = &host[strlen(host) - 1];
- hp = sm_gethostbyname(host, family);
- if (hp == NULL && *p == '.')
- {
- # if NAMED_BIND
- int oldopts = _res.options;
- _res.options &= ~(RES_DEFNAMES|RES_DNSRCH);
- # endif /* NAMED_BIND */
- *p = ' ';
- hp = sm_gethostbyname(host, family);
- *p = '.';
- # if NAMED_BIND
- _res.options = oldopts;
- # endif /* NAMED_BIND */
- }
- }
- gothostent:
- if (hp == NULL)
- {
- # if NAMED_BIND
- /* check for name server timeouts */
- if (errno == ETIMEDOUT || h_errno == TRY_AGAIN ||
- (errno == ECONNREFUSED && UseNameServer))
- {
- save_errno = errno;
- mci_setstat(mci, EX_TEMPFAIL, "4.4.3", NULL);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- # endif /* NAMED_BIND */
- # if NETINET6
- /*
- ** Try v6 first, then fall back to v4.
- ** If we found a v6 address, but no v4
- ** addresses, then TEMPFAIL.
- */
- if (family == AF_INET6)
- {
- family = AF_INET;
- goto v4retry;
- }
- if (v6found)
- goto v6tempfail;
- # endif /* NETINET6 */
- save_errno = errno;
- mci_setstat(mci, EX_NOHOST, "5.1.2", NULL);
- errno = save_errno;
- return EX_NOHOST;
- }
- addr.sa.sa_family = hp->h_addrtype;
- switch (hp->h_addrtype)
- {
- # if NETINET
- case AF_INET:
- memmove(&addr.sin.sin_addr,
- hp->h_addr,
- INADDRSZ);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- memmove(&addr.sin6.sin6_addr,
- hp->h_addr,
- IN6ADDRSZ);
- break;
- # endif /* NETINET6 */
- default:
- if (hp->h_length > sizeof addr.sa.sa_data)
- {
- syserr("makeconnection: long sa_data: family %d len %d",
- hp->h_addrtype, hp->h_length);
- mci_setstat(mci, EX_NOHOST, "5.1.2", NULL);
- errno = EINVAL;
- return EX_NOHOST;
- }
- memmove(addr.sa.sa_data,
- hp->h_addr,
- hp->h_length);
- break;
- }
- addrno = 1;
- }
- /*
- ** Determine the port number.
- */
- if (port == 0)
- {
- # ifdef NO_GETSERVBYNAME
- port = htons(25);
- # else /* NO_GETSERVBYNAME */
- register struct servent *sp = getservbyname("smtp", "tcp");
- if (sp == NULL)
- {
- if (LogLevel > 2)
- sm_syslog(LOG_ERR, NOQID,
- "makeconnection: service "smtp" unknown");
- port = htons(25);
- }
- else
- port = sp->s_port;
- # endif /* NO_GETSERVBYNAME */
- }
- switch (addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- addr.sin.sin_port = port;
- addrlen = sizeof (struct sockaddr_in);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- addr.sin6.sin6_port = port;
- addrlen = sizeof (struct sockaddr_in6);
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- /* assume two byte transport selector */
- memmove(TSEL((struct sockaddr_iso *) &addr), (char *) &port, 2);
- addrlen = sizeof (struct sockaddr_iso);
- break;
- # endif /* NETISO */
- default:
- syserr("Can't connect to address family %d", addr.sa.sa_family);
- mci_setstat(mci, EX_NOHOST, "5.1.2", NULL);
- errno = EINVAL;
- return EX_NOHOST;
- }
- /*
- ** Try to actually open the connection.
- */
- # ifdef XLA
- /* if too many connections, don't bother trying */
- if (!xla_noqueue_ok(host))
- return EX_TEMPFAIL;
- # endif /* XLA */
- firstconnect = TRUE;
- for (;;)
- {
- if (tTd(16, 1))
- dprintf("makeconnection (%s [%s])n",
- host, anynet_ntoa(&addr));
- /* save for logging */
- CurHostAddr = addr;
- if (bitnset(M_SECURE_PORT, mci->mci_mailer->m_flags))
- {
- int rport = IPPORT_RESERVED - 1;
- s = rresvport(&rport);
- }
- else
- {
- s = socket(addr.sa.sa_family, SOCK_STREAM, 0);
- }
- if (s < 0)
- {
- save_errno = errno;
- syserr("makeconnection: cannot create socket");
- # ifdef XLA
- xla_host_end(host);
- # endif /* XLA */
- mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- # ifdef SO_SNDBUF
- if (TcpSndBufferSize > 0)
- {
- if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
- (char *) &TcpSndBufferSize,
- sizeof(TcpSndBufferSize)) < 0)
- syserr("makeconnection: setsockopt(SO_SNDBUF)");
- }
- # endif /* SO_SNDBUF */
- # ifdef SO_RCVBUF
- if (TcpRcvBufferSize > 0)
- {
- if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
- (char *) &TcpRcvBufferSize,
- sizeof(TcpRcvBufferSize)) < 0)
- syserr("makeconnection: setsockopt(SO_RCVBUF)");
- }
- # endif /* SO_RCVBUF */
- if (tTd(16, 1))
- dprintf("makeconnection: fd=%dn", s);
- /* turn on network debugging? */
- if (tTd(16, 101))
- {
- int on = 1;
- (void) setsockopt(s, SOL_SOCKET, SO_DEBUG,
- (char *)&on, sizeof on);
- }
- if (e->e_xfp != NULL)
- (void) fflush(e->e_xfp); /* for debugging */
- errno = 0; /* for debugging */
- if (clt_bind)
- {
- int on = 1;
- switch (clt_addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (clt_addr.sin.sin_port != 0)
- (void) setsockopt(s, SOL_SOCKET,
- SO_REUSEADDR,
- (char *) &on,
- sizeof on);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (clt_addr.sin6.sin6_port != 0)
- (void) setsockopt(s, SOL_SOCKET,
- SO_REUSEADDR,
- (char *) &on,
- sizeof on);
- break;
- # endif /* NETINET6 */
- }
- if (bind(s, &clt_addr.sa, socksize) < 0)
- {
- save_errno = errno;
- (void) close(s);
- errno = save_errno;
- syserr("makeconnection: cannot bind socket [%s]",
- anynet_ntoa(&clt_addr));
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- }
- /*
- ** Linux seems to hang in connect for 90 minutes (!!!).
- ** Time out the connect to avoid this problem.
- */
- if (setjmp(CtxConnectTimeout) == 0)
- {
- int i;
- if (e->e_ntries <= 0 && TimeOuts.to_iconnect != 0)
- ev = setevent(TimeOuts.to_iconnect, connecttimeout, 0);
- else if (TimeOuts.to_connect != 0)
- ev = setevent(TimeOuts.to_connect, connecttimeout, 0);
- else
- ev = NULL;
- switch (ConnectOnlyTo.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- addr.sin.sin_addr.s_addr = ConnectOnlyTo.sin.sin_addr.s_addr;
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- memmove(&addr.sin6.sin6_addr,
- &ConnectOnlyTo.sin6.sin6_addr,
- IN6ADDRSZ);
- break;
- # endif /* NETINET6 */
- }
- i = connect(s, (struct sockaddr *) &addr, addrlen);
- save_errno = errno;
- if (ev != NULL)
- clrevent(ev);
- if (i >= 0)
- break;
- }
- else
- save_errno = errno;
- /* if running demand-dialed connection, try again */
- if (DialDelay > 0 && firstconnect)
- {
- if (tTd(16, 1))
- dprintf("Connect failed (%s); trying again...n",
- errstring(save_errno));
- firstconnect = FALSE;
- (void) sleep(DialDelay);
- continue;
- }
- /* couldn't connect.... figure out why */
- (void) close(s);
- if (LogLevel >= 14)
- sm_syslog(LOG_INFO, e->e_id,
- "makeconnection (%s [%s]) failed: %s",
- host, anynet_ntoa(&addr),
- errstring(save_errno));
- if (hp != NULL && hp->h_addr_list[addrno] != NULL)
- {
- if (tTd(16, 1))
- dprintf("Connect failed (%s); trying new address....n",
- errstring(save_errno));
- switch (addr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- memmove(&addr.sin.sin_addr,
- hp->h_addr_list[addrno++],
- INADDRSZ);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- memmove(&addr.sin6.sin6_addr,
- hp->h_addr_list[addrno++],
- IN6ADDRSZ);
- break;
- # endif /* NETINET6 */
- default:
- memmove(addr.sa.sa_data,
- hp->h_addr_list[addrno++],
- hp->h_length);
- break;
- }
- continue;
- }
- # if NETINET6
- if (family == AF_INET6)
- {
- if (tTd(16, 1))
- dprintf("Connect failed (%s); retrying with AF_INET....n",
- errstring(save_errno));
- v6found = TRUE;
- family = AF_INET;
- goto v4retry;
- }
- v6tempfail:
- # endif /* NETINET6 */
- /* couldn't open connection */
- # if NETINET6
- /* Don't clobber an already saved errno from v4retry */
- if (errno > 0)
- # endif /* NETINET6 */
- save_errno = errno;
- if (tTd(16, 1))
- dprintf("Connect failed (%s)n", errstring(save_errno));
- # ifdef XLA
- xla_host_end(host);
- # endif /* XLA */
- mci_setstat(mci, EX_TEMPFAIL, "4.4.1", NULL);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- /* connection ok, put it into canonical form */
- mci->mci_out = NULL;
- if ((mci->mci_out = fdopen(s, "w")) == NULL ||
- (s = dup(s)) < 0 ||
- (mci->mci_in = fdopen(s, "r")) == NULL)
- {
- save_errno = errno;
- syserr("cannot open SMTP client channel, fd=%d", s);
- mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
- if (mci->mci_out != NULL)
- (void) fclose(mci->mci_out);
- (void) close(s);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- /* find out name for Interface through which we connect */
- len = sizeof addr;
- if (getsockname(s, &addr.sa, &len) == 0)
- {
- char *name;
- define(macid("{if_addr}", NULL), newstr(anynet_ntoa(&addr)),
- &BlankEnvelope);
- name = hostnamebyanyaddr(&addr);
- define(macid("{if_name}", NULL), newstr(name), &BlankEnvelope);
- if (LogLevel > 11)
- {
- /* log connection information */
- sm_syslog(LOG_INFO, e->e_id,
- "SMTP outcoming connect on %.40s", name);
- }
- if (bitnset(D_IFNHELO, d_flags))
- {
- if (name[0] != '[' && strchr(name, '.') != NULL)
- mci->mci_heloname = newstr(name);
- }
- }
- else
- {
- define(macid("{if_name}", NULL), NULL, &BlankEnvelope);
- define(macid("{if_addr}", NULL), NULL, &BlankEnvelope);
- }
- mci_setstat(mci, EX_OK, NULL, NULL);
- return EX_OK;
- }
- static void
- connecttimeout()
- {
- errno = ETIMEDOUT;
- longjmp(CtxConnectTimeout, 1);
- }
- /*
- ** MAKECONNECTION_DS -- make a connection to a domain socket.
- **
- ** Parameters:
- ** mux_path -- the path of the socket to connect to.
- ** mci -- a pointer to the mail connection information
- ** structure to be filled in.
- **
- ** Returns:
- ** An exit code telling whether the connection could be
- ** made and if not why not.
- **
- ** Side Effects:
- ** none.
- */
- # if NETUNIX
- int makeconnection_ds(mux_path, mci)
- char *mux_path;
- register MCI *mci;
- {
- int sock;
- int rval, save_errno;
- long sff = SFF_SAFEDIRPATH|SFF_OPENASROOT|SFF_NOLINK|SFF_ROOTOK|SFF_EXECOK;
- struct sockaddr_un unix_addr;
- /* if not safe, don't connect */
- rval = safefile(mux_path, RunAsUid, RunAsGid, RunAsUserName,
- sff, S_IRUSR|S_IWUSR, NULL);
- if (rval != 0)
- {
- syserr("makeconnection_ds: unsafe domain socket");
- mci_setstat(mci, EX_TEMPFAIL, "4.3.5", NULL);
- errno = rval;
- return EX_TEMPFAIL;
- }
- /* prepare address structure */
- memset(&unix_addr, ' ', sizeof unix_addr);
- unix_addr.sun_family = AF_UNIX;
- if (strlen(mux_path) >= sizeof unix_addr.sun_path)
- {
- syserr("makeconnection_ds: domain socket name too long");
- /* XXX why TEMPFAIL ? */
- mci_setstat(mci, EX_TEMPFAIL, "5.3.5", NULL);
- errno = ENAMETOOLONG;
- return EX_UNAVAILABLE;
- }
- (void) strlcpy(unix_addr.sun_path, mux_path, sizeof unix_addr.sun_path);
- /* initialize domain socket */
- sock = socket(AF_UNIX, SOCK_STREAM, 0);
- if (sock == -1)
- {
- save_errno = errno;
- syserr("makeconnection_ds: could not create domain socket");
- mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- /* connect to server */
- if (connect(sock, (struct sockaddr *) &unix_addr,
- sizeof(unix_addr)) == -1)
- {
- save_errno = errno;
- syserr("Could not connect to socket %s", mux_path);
- mci_setstat(mci, EX_TEMPFAIL, "4.4.1", NULL);
- (void) close(sock);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- /* connection ok, put it into canonical form */
- mci->mci_out = NULL;
- if ((mci->mci_out = fdopen(sock, "w")) == NULL ||
- (sock = dup(sock)) < 0 ||
- (mci->mci_in = fdopen(sock, "r")) == NULL)
- {
- save_errno = errno;
- syserr("cannot open SMTP client channel, fd=%d", sock);
- mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
- if (mci->mci_out != NULL)
- (void) fclose(mci->mci_out);
- (void) close(sock);
- errno = save_errno;
- return EX_TEMPFAIL;
- }
- mci_setstat(mci, EX_OK, NULL, NULL);
- errno = 0;
- return EX_OK;
- }
- # endif /* NETUNIX */
- /*
- ** MYHOSTNAME -- return the name of this host.
- **
- ** Parameters:
- ** hostbuf -- a place to return the name of this host.
- ** size -- the size of hostbuf.
- **
- ** Returns:
- ** A list of aliases for this host.
- **
- ** Side Effects:
- ** Adds numeric codes to $=w.
- */
- struct hostent *
- myhostname(hostbuf, size)
- char hostbuf[];
- int size;
- {
- register struct hostent *hp;
- if (gethostname(hostbuf, size) < 0)
- {
- (void) strlcpy(hostbuf, "localhost", size);
- }
- hp = sm_gethostbyname(hostbuf, InetMode);
- if (hp == NULL)
- return NULL;
- if (strchr(hp->h_name, '.') != NULL || strchr(hostbuf, '.') == NULL)
- (void) cleanstrcpy(hostbuf, hp->h_name, size);
- # if NETINFO
- if (strchr(hostbuf, '.') == NULL)
- {
- char *domainname;
- domainname = ni_propval("/locations", NULL, "resolver",
- "domain", ' ');
- if (domainname != NULL &&
- strlen(domainname) + strlen(hostbuf) + 1 < size)
- {
- (void) strlcat(hostbuf, ".", size);
- (void) strlcat(hostbuf, domainname, size);
- }
- }
- # endif /* NETINFO */
- /*
- ** If there is still no dot in the name, try looking for a
- ** dotted alias.
- */
- if (strchr(hostbuf, '.') == NULL)
- {
- char **ha;
- for (ha = hp->h_aliases; ha != NULL && *ha != NULL; ha++)
- {
- if (strchr(*ha, '.') != NULL)
- {
- (void) cleanstrcpy(hostbuf, *ha, size - 1);
- hostbuf[size - 1] = ' ';
- break;
- }
- }
- }
- /*
- ** If _still_ no dot, wait for a while and try again -- it is
- ** possible that some service is starting up. This can result
- ** in excessive delays if the system is badly configured, but
- ** there really isn't a way around that, particularly given that
- ** the config file hasn't been read at this point.
- ** All in all, a bit of a mess.
- */
- if (strchr(hostbuf, '.') == NULL &&
- !getcanonname(hostbuf, size, TRUE))
- {
- sm_syslog(LOG_CRIT, NOQID,
- "My unqualified host name (%s) unknown; sleeping for retry",
- hostbuf);
- message("My unqualified host name (%s) unknown; sleeping for retry",
- hostbuf);
- (void) sleep(60);
- if (!getcanonname(hostbuf, size, TRUE))
- {
- sm_syslog(LOG_ALERT, NOQID,
- "unable to qualify my own domain name (%s) -- using short name",
- hostbuf);
- message("WARNING: unable to qualify my own domain name (%s) -- using short name",
- hostbuf);
- }
- }
- return hp;
- }
- /*
- ** ADDRCMP -- compare two host addresses
- **
- ** Parameters:
- ** hp -- hostent structure for the first address
- ** ha -- actual first address
- ** sa -- second address
- **
- ** Returns:
- ** 0 -- if ha and sa match
- ** else -- they don't match
- */
- static int
- addrcmp(hp, ha, sa)
- struct hostent *hp;
- char *ha;
- SOCKADDR *sa;
- {
- # if NETINET6
- u_char *a;
- # endif /* NETINET6 */
- switch (sa->sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (hp->h_addrtype == AF_INET)
- return memcmp(ha, (char *) &sa->sin.sin_addr, INADDRSZ);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- a = (u_char *) &sa->sin6.sin6_addr;
- /* Straight binary comparison */
- if (hp->h_addrtype == AF_INET6)
- return memcmp(ha, a, IN6ADDRSZ);
- /* If IPv4-mapped IPv6 address, compare the IPv4 section */
- if (hp->h_addrtype == AF_INET &&
- IN6_IS_ADDR_V4MAPPED(&sa->sin6.sin6_addr))
- return memcmp(a + IN6ADDRSZ - INADDRSZ, ha, INADDRSZ);
- break;
- # endif /* NETINET6 */
- }
- return -1;
- }
- /*
- ** GETAUTHINFO -- get the real host name associated with a file descriptor
- **
- ** Uses RFC1413 protocol to try to get info from the other end.
- **
- ** Parameters:
- ** fd -- the descriptor
- ** may_be_forged -- an outage that is set to TRUE if the
- ** forward lookup of RealHostName does not match
- ** RealHostAddr; set to FALSE if they do match.
- **
- ** Returns:
- ** The user@host information associated with this descriptor.
- */
- static jmp_buf CtxAuthTimeout;
- static void
- authtimeout()
- {
- longjmp(CtxAuthTimeout, 1);
- }
- char *
- getauthinfo(fd, may_be_forged)
- int fd;
- bool *may_be_forged;
- {
- SOCKADDR_LEN_T falen;
- register char *volatile p = NULL;
- SOCKADDR la;
- SOCKADDR_LEN_T lalen;
- register struct servent *sp;
- volatile int s;
- int i = 0;
- EVENT *ev;
- int nleft;
- struct hostent *hp;
- char *ostype = NULL;
- char **ha;
- char ibuf[MAXNAME + 1];
- static char hbuf[MAXNAME * 2 + 11];
- *may_be_forged = FALSE;
- falen = sizeof RealHostAddr;
- if (isatty(fd) || (i = getpeername(fd, &RealHostAddr.sa, &falen)) < 0 ||
- falen <= 0 || RealHostAddr.sa.sa_family == 0)
- {
- if (i < 0 && errno != ENOTSOCK)
- return NULL;
- (void) snprintf(hbuf, sizeof hbuf, "%s@localhost",
- RealUserName);
- if (tTd(9, 1))
- dprintf("getauthinfo: %sn", hbuf);
- return hbuf;
- }
- if (RealHostName == NULL)
- {
- /* translate that to a host name */
- RealHostName = newstr(hostnamebyanyaddr(&RealHostAddr));
- if (strlen(RealHostName) > MAXNAME)
- RealHostName[MAXNAME] = ' ';
- }
- /* cross check RealHostName with forward DNS lookup */
- if (anynet_ntoa(&RealHostAddr)[0] == '[' ||
- RealHostName[0] == '[')
- {
- /*
- ** address is not a socket or have an
- ** IP address with no forward lookup
- */
- *may_be_forged = FALSE;
- }
- else
- {
- /* try to match the reverse against the forward lookup */
- hp = sm_gethostbyname(RealHostName,
- RealHostAddr.sa.sa_family);
- if (hp == NULL)
- *may_be_forged = TRUE;
- else
- {
- for (ha = hp->h_addr_list; *ha != NULL; ha++)
- if (addrcmp(hp, *ha, &RealHostAddr) == 0)
- break;
- *may_be_forged = *ha == NULL;
- }
- }
- if (TimeOuts.to_ident == 0)
- goto noident;
- lalen = sizeof la;
- switch (RealHostAddr.sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- if (getsockname(fd, &la.sa, &lalen) < 0 ||
- lalen <= 0 ||
- la.sa.sa_family != AF_INET)
- {
- /* no ident info */
- goto noident;
- }
- /* create ident query */
- (void) snprintf(ibuf, sizeof ibuf, "%d,%drn",
- ntohs(RealHostAddr.sin.sin_port),
- ntohs(la.sin.sin_port));
- /* create local address */
- la.sin.sin_port = 0;
- /* create foreign address */
- # ifdef NO_GETSERVBYNAME
- RealHostAddr.sin.sin_port = htons(113);
- # else /* NO_GETSERVBYNAME */
- sp = getservbyname("auth", "tcp");
- if (sp != NULL)
- RealHostAddr.sin.sin_port = sp->s_port;
- else
- RealHostAddr.sin.sin_port = htons(113);
- break;
- # endif /* NO_GETSERVBYNAME */
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- if (getsockname(fd, &la.sa, &lalen) < 0 ||
- lalen <= 0 ||
- la.sa.sa_family != AF_INET6)
- {
- /* no ident info */
- goto noident;
- }
- /* create ident query */
- (void) snprintf(ibuf, sizeof ibuf, "%d,%drn",
- ntohs(RealHostAddr.sin6.sin6_port),
- ntohs(la.sin6.sin6_port));
- /* create local address */
- la.sin6.sin6_port = 0;
- /* create foreign address */
- # ifdef NO_GETSERVBYNAME
- RealHostAddr.sin6.sin6_port = htons(113);
- # else /* NO_GETSERVBYNAME */
- sp = getservbyname("auth", "tcp");
- if (sp != NULL)
- RealHostAddr.sin6.sin6_port = sp->s_port;
- else
- RealHostAddr.sin6.sin6_port = htons(113);
- break;
- # endif /* NO_GETSERVBYNAME */
- # endif /* NETINET6 */
- default:
- /* no ident info */
- goto noident;
- }
- s = -1;
- if (setjmp(CtxAuthTimeout) != 0)
- {
- if (s >= 0)
- (void) close(s);
- goto noident;
- }
- /* put a timeout around the whole thing */
- ev = setevent(TimeOuts.to_ident, authtimeout, 0);
- /* connect to foreign IDENT server using same address as SMTP socket */
- s = socket(la.sa.sa_family, SOCK_STREAM, 0);
- if (s < 0)
- {
- clrevent(ev);
- goto noident;
- }
- if (bind(s, &la.sa, lalen) < 0 ||
- connect(s, &RealHostAddr.sa, lalen) < 0)
- {
- goto closeident;
- }
- if (tTd(9, 10))
- dprintf("getauthinfo: sent %s", ibuf);
- /* send query */
- if (write(s, ibuf, strlen(ibuf)) < 0)
- goto closeident;
- /* get result */
- p = &ibuf[0];
- nleft = sizeof ibuf - 1;
- while ((i = read(s, p, nleft)) > 0)
- {
- p += i;
- nleft -= i;
- *p = ' ';
- if (strchr(ibuf, 'n') != NULL)
- break;
- }
- (void) close(s);
- clrevent(ev);
- if (i < 0 || p == &ibuf[0])
- goto noident;
- if (*--p == 'n' && *--p == 'r')
- p--;
- *++p = ' ';
- if (tTd(9, 3))
- dprintf("getauthinfo: got %sn", ibuf);
- /* parse result */
- p = strchr(ibuf, ':');
- if (p == NULL)
- {
- /* malformed response */
- goto noident;
- }
- while (isascii(*++p) && isspace(*p))
- continue;
- if (strncasecmp(p, "userid", 6) != 0)
- {
- /* presumably an error string */
- goto noident;
- }
- p += 6;
- while (isascii(*p) && isspace(*p))
- p++;
- if (*p++ != ':')
- {
- /* either useridxx or malformed response */
- goto noident;
- }
- /* p now points to the OSTYPE field */
- while (isascii(*p) && isspace(*p))
- p++;
- ostype = p;
- p = strchr(p, ':');
- if (p == NULL)
- {
- /* malformed response */
- goto noident;
- }
- else
- {
- char *charset;
- *p = ' ';
- charset = strchr(ostype, ',');
- if (charset != NULL)
- *charset = ' ';
- }
- /* 1413 says don't do this -- but it's broken otherwise */
- while (isascii(*++p) && isspace(*p))
- continue;
- /* p now points to the authenticated name -- copy carefully */
- if (strncasecmp(ostype, "other", 5) == 0 &&
- (ostype[5] == ' ' || ostype[5] == ' '))
- {
- snprintf(hbuf, sizeof hbuf, "IDENT:");
- cleanstrcpy(&hbuf[6], p, MAXNAME);
- }
- else
- cleanstrcpy(hbuf, p, MAXNAME);
- i = strlen(hbuf);
- snprintf(&hbuf[i], sizeof hbuf - i, "@%s",
- RealHostName == NULL ? "localhost" : RealHostName);
- goto postident;
- closeident:
- (void) close(s);
- clrevent(ev);
- noident:
- if (RealHostName == NULL)
- {
- if (tTd(9, 1))
- dprintf("getauthinfo: NULLn");
- return NULL;
- }
- snprintf(hbuf, sizeof hbuf, "%s", RealHostName);
- postident:
- # if IP_SRCROUTE
- # ifndef GET_IPOPT_DST
- # define GET_IPOPT_DST(dst) (dst)
- # endif /* ! GET_IPOPT_DST */
- /*
- ** Extract IP source routing information.
- **
- ** Format of output for a connection from site a through b
- ** through c to d:
- ** loose: @site-c@site-b:site-a
- ** strict: !@site-c@site-b:site-a
- **
- ** o - pointer within ipopt_list structure.
- ** q - pointer within ls/ss rr route data
- ** p - pointer to hbuf
- */
- if (RealHostAddr.sa.sa_family == AF_INET)
- {
- SOCKOPT_LEN_T ipoptlen;
- int j;
- u_char *q;
- u_char *o;
- int l;
- struct IPOPTION ipopt;
- ipoptlen = sizeof ipopt;
- if (getsockopt(fd, IPPROTO_IP, IP_OPTIONS,
- (char *) &ipopt, &ipoptlen) < 0)
- goto noipsr;
- if (ipoptlen == 0)
- goto noipsr;
- o = (u_char *) ipopt.IP_LIST;
- while (o != NULL && o < (u_char *) &ipopt + ipoptlen)
- {
- switch (*o)
- {
- case IPOPT_EOL:
- o = NULL;
- break;
- case IPOPT_NOP:
- o++;
- break;
- case IPOPT_SSRR:
- case IPOPT_LSRR:
- /*
- ** Source routing.
- ** o[0] is the option type (loose/strict).
- ** o[1] is the length of this option,
- ** including option type and
- ** length.
- ** o[2] is the pointer into the route
- ** data.
- ** o[3] begins the route data.
- */
- p = &hbuf[strlen(hbuf)];
- l = sizeof hbuf - (hbuf - p) - 6;
- snprintf(p, SPACELEFT(hbuf, p), " [%s@%.*s",
- *o == IPOPT_SSRR ? "!" : "",
- l > 240 ? 120 : l / 2,
- inet_ntoa(GET_IPOPT_DST(ipopt.IP_DST)));
- i = strlen(p);
- p += i;
- l -= strlen(p);
- j = o[1] / sizeof(struct in_addr) - 1;
- /* q skips length and router pointer to data */
- q = &o[3];
- for ( ; j >= 0; j--)
- {
- struct in_addr addr;
- memcpy(&addr, q, sizeof(addr));
- snprintf(p, SPACELEFT(hbuf, p),
- "%c%.*s",
- j != 0 ? '@' : ':',
- l > 240 ? 120 :
- j == 0 ? l : l / 2,
- inet_ntoa(addr));
- i = strlen(p);
- p += i;
- l -= i + 1;
- q += sizeof(struct in_addr);
- }
- o += o[1];
- break;
- default:
- /* Skip over option */
- o += o[1];
- break;
- }
- }
- snprintf(p, SPACELEFT(hbuf, p), "]");
- goto postipsr;
- }
- noipsr:
- # endif /* IP_SRCROUTE */
- if (RealHostName != NULL && RealHostName[0] != '[')
- {
- p = &hbuf[strlen(hbuf)];
- (void) snprintf(p, SPACELEFT(hbuf, p), " [%.100s]",
- anynet_ntoa(&RealHostAddr));
- }
- if (*may_be_forged)
- {
- p = &hbuf[strlen(hbuf)];
- (void) snprintf(p, SPACELEFT(hbuf, p), " (may be forged)");
- }
- # if IP_SRCROUTE
- postipsr:
- # endif /* IP_SRCROUTE */
- if (tTd(9, 1))
- dprintf("getauthinfo: %sn", hbuf);
- return hbuf;
- }
- /*
- ** HOST_MAP_LOOKUP -- turn a hostname into canonical form
- **
- ** Parameters:
- ** map -- a pointer to this map.
- ** name -- the (presumably unqualified) hostname.
- ** av -- unused -- for compatibility with other mapping
- ** functions.
- ** statp -- an exit status (out parameter) -- set to
- ** EX_TEMPFAIL if the name server is unavailable.
- **
- ** Returns:
- ** The mapping, if found.
- ** NULL if no mapping found.
- **
- ** Side Effects:
- ** Looks up the host specified in hbuf. If it is not
- ** the canonical name for that host, return the canonical
- ** name (unless MF_MATCHONLY is set, which will cause the
- ** status only to be returned).
- */
- char *
- host_map_lookup(map, name, av, statp)
- MAP *map;
- char *name;
- char **av;
- int *statp;
- {
- register struct hostent *hp;
- # if NETINET
- struct in_addr in_addr;
- # endif /* NETINET */
- # if NETINET6
- struct in6_addr in6_addr;
- # endif /* NETINET6 */
- char *cp, *ans = NULL;
- register STAB *s;
- char hbuf[MAXNAME + 1];
- /*
- ** See if we have already looked up this name. If so, just
- ** return it.
- */
- s = stab(name, ST_NAMECANON, ST_ENTER);
- if (bitset(NCF_VALID, s->s_namecanon.nc_flags))
- {
- if (tTd(9, 1))
- dprintf("host_map_lookup(%s) => CACHE %sn",
- name,
- s->s_namecanon.nc_cname == NULL
- ? "NULL"
- : s->s_namecanon.nc_cname);
- errno = s->s_namecanon.nc_errno;
- # if NAMED_BIND
- h_errno = s->s_namecanon.nc_herrno;
- # endif /* NAMED_BIND */
- *statp = s->s_namecanon.nc_stat;
- if (*statp == EX_TEMPFAIL)
- {
- CurEnv->e_status = "4.4.3";
- message("851 %s: Name server timeout",
- shortenstring(name, 33));
- }
- if (*statp != EX_OK)
- return NULL;
- if (s->s_namecanon.nc_cname == NULL)
- {
- syserr("host_map_lookup(%s): bogus NULL cache entry, errno = %d, h_errno = %d",
- name,
- s->s_namecanon.nc_errno,
- s->s_namecanon.nc_herrno);
- return NULL;
- }
- if (bitset(MF_MATCHONLY, map->map_mflags))
- cp = map_rewrite(map, name, strlen(name), NULL);
- else
- cp = map_rewrite(map,
- s->s_namecanon.nc_cname,
- strlen(s->s_namecanon.nc_cname),
- av);
- return cp;
- }
- /*
- ** If we are running without a regular network connection (usually
- ** dial-on-demand) and we are just queueing, we want to avoid DNS
- ** lookups because those could try to connect to a server.
- */
- if (CurEnv->e_sendmode == SM_DEFER &&
- bitset(MF_DEFER, map->map_mflags))
- {
- if (tTd(9, 1))
- dprintf("host_map_lookup(%s) => DEFERREDn", name);
- *statp = EX_TEMPFAIL;
- return NULL;
- }
- /*
- ** If first character is a bracket, then it is an address
- ** lookup. Address is copied into a temporary buffer to
- ** strip the brackets and to preserve name if address is
- ** unknown.
- */
- if (tTd(9, 1))
- dprintf("host_map_lookup(%s) => ", name);
- if (*name != '[')
- {
- snprintf(hbuf, sizeof hbuf, "%s", name);
- if (getcanonname(hbuf, sizeof hbuf - 1, !HasWildcardMX))
- ans = hbuf;
- }
- else
- {
- if ((cp = strchr(name, ']')) == NULL)
- return NULL;
- *cp = ' ';
- hp = NULL;
- # if NETINET
- if ((in_addr.s_addr = inet_addr(&name[1])) != INADDR_NONE)
- hp = sm_gethostbyaddr((char *)&in_addr,
- INADDRSZ, AF_INET);
- # endif /* NETINET */
- # if NETINET6
- if (hp == NULL &&
- inet_pton(AF_INET6, &name[1], &in6_addr) == 1)
- hp = sm_gethostbyaddr((char *)&in6_addr,
- IN6ADDRSZ, AF_INET6);
- # endif /* NETINET6 */
- *cp = ']';
- if (hp != NULL)
- {
- /* found a match -- copy out */
- ans = denlstring((char *) hp->h_name, TRUE, TRUE);
- }
- }
- s->s_namecanon.nc_flags |= NCF_VALID; /* will be soon */
- /* Found an answer */
- if (ans != NULL)
- {
- s->s_namecanon.nc_stat = *statp = EX_OK;
- s->s_namecanon.nc_cname = newstr(ans);
- if (bitset(MF_MATCHONLY, map->map_mflags))
- cp = map_rewrite(map, name, strlen(name), NULL);
- else
- cp = map_rewrite(map, ans, strlen(ans), av);
- return cp;
- }
- /* No match found */
- s->s_namecanon.nc_errno = errno;
- # if NAMED_BIND
- s->s_namecanon.nc_herrno = h_errno;
- if (tTd(9, 1))
- dprintf("FAIL (%d)n", h_errno);
- switch (h_errno)
- {
- case TRY_AGAIN:
- if (UseNameServer)
- {
- CurEnv->e_status = "4.4.3";
- message("851 %s: Name server timeout",
- shortenstring(name, 33));
- }
- *statp = EX_TEMPFAIL;
- break;
- case HOST_NOT_FOUND:
- case NO_DATA:
- *statp = EX_NOHOST;
- break;
- case NO_RECOVERY:
- *statp = EX_SOFTWARE;
- break;
- default:
- *statp = EX_UNAVAILABLE;
- break;
- }
- # else /* NAMED_BIND */
- if (tTd(9, 1))
- dprintf("FAILn");
- *statp = EX_NOHOST;
- # endif /* NAMED_BIND */
- s->s_namecanon.nc_stat = *statp;
- return NULL;
- }
- #else /* DAEMON */
- /* code for systems without sophisticated networking */
- /*
- ** MYHOSTNAME -- stub version for case of no daemon code.
- **
- ** Can't convert to upper case here because might be a UUCP name.
- **
- ** Mark, you can change this to be anything you want......
- */
- char **
- myhostname(hostbuf, size)
- char hostbuf[];
- int size;
- {
- register FILE *f;
- hostbuf[0] = ' ';
- f = fopen("/usr/include/whoami", "r");
- if (f != NULL)
- {
- (void) fgets(hostbuf, size, f);
- fixcrlf(hostbuf, TRUE);
- (void) fclose(f);
- }
- return NULL;
- }
- /*
- ** GETAUTHINFO -- get the real host name associated with a file descriptor
- **
- ** Parameters:
- ** fd -- the descriptor
- ** may_be_forged -- an outage that is set to TRUE if the
- ** forward lookup of RealHostName does not match
- ** RealHostAddr; set to FALSE if they do match.
- **
- ** Returns:
- ** The host name associated with this descriptor, if it can
- ** be determined.
- ** NULL otherwise.
- **
- ** Side Effects:
- ** none
- */
- char *
- getauthinfo(fd, may_be_forged)
- int fd;
- bool *may_be_forged;
- {
- *may_be_forged = FALSE;
- return NULL;
- }
- /*
- ** HOST_MAP_LOOKUP -- turn a hostname into canonical form
- **
- ** Parameters:
- ** map -- a pointer to the database map.
- ** name -- a buffer containing a hostname.
- ** avp -- a pointer to a (cf file defined) argument vector.
- ** statp -- an exit status (out parameter).
- **
- ** Returns:
- ** mapped host name
- ** FALSE otherwise.
- **
- ** Side Effects:
- ** Looks up the host specified in name. If it is not
- ** the canonical name for that host, replace it with
- ** the canonical name. If the name is unknown, or it
- ** is already the canonical name, leave it unchanged.
- */
- /*ARGSUSED*/
- char *
- host_map_lookup(map, name, avp, statp)
- MAP *map;
- char *name;
- char **avp;
- char *statp;
- {
- register struct hostent *hp = NULL;
- char *cp;
- # if NETINET6
- hp = sm_gethostbyname(name, AF_INET6);
- # endif /* NETINET6 */
- if (hp == NULL)
- hp = sm_gethostbyname(name, AF_INET);
- if (hp == NULL)
- {
- # if NAMED_BIND
- if (tTd(9, 1))
- dprintf("FAIL (%d)n", h_errno);
- switch (h_errno)
- {
- case TRY_AGAIN:
- if (UseNameServer)
- {
- CurEnv->e_status = "4.4.3";
- message("851 %s: Name server timeout",
- shortenstring(name, 33));
- }
- *statp = EX_TEMPFAIL;
- break;
- case HOST_NOT_FOUND:
- case NO_DATA:
- *statp = EX_NOHOST;
- break;
- case NO_RECOVERY:
- *statp = EX_SOFTWARE;
- break;
- default:
- *statp = EX_UNAVAILABLE;
- break;
- }
- #else /* NAMED_BIND */
- *statp = EX_NOHOST;
- #endif /* NAMED_BIND */
- return NULL;
- }
- if (bitset(MF_MATCHONLY, map->map_mflags))
- cp = map_rewrite(map, name, strlen(name), NULL);
- else
- cp = map_rewrite(map, hp->h_name, strlen(hp->h_name), avp);
- return cp;
- }
- #endif /* DAEMON */
- /*
- ** HOST_MAP_INIT -- initialize host class structures
- */
- bool
- host_map_init(map, args)
- MAP *map;
- char *args;
- {
- register char *p = args;
- for (;;)
- {
- while (isascii(*p) && isspace(*p))
- p++;
- if (*p != '-')
- break;
- switch (*++p)
- {
- case 'a':
- map->map_app = ++p;
- break;
- case 'T':
- map->map_tapp = ++p;
- break;
- case 'm':
- map->map_mflags |= MF_MATCHONLY;
- break;
- case 't':
- map->map_mflags |= MF_NODEFER;
- break;
- case 'S': /* only for consistency */
- map->map_spacesub = *++p;
- break;
- case 'D':
- map->map_mflags |= MF_DEFER;
- break;
- }
- while (*p != ' ' && !(isascii(*p) && isspace(*p)))
- p++;
- if (*p != ' ')
- *p++ = ' ';
- }
- if (map->map_app != NULL)
- map->map_app = newstr(map->map_app);
- if (map->map_tapp != NULL)
- map->map_tapp = newstr(map->map_tapp);
- return TRUE;
- }
- #if NETINET6
- /*
- ** ANYNET_NTOP -- convert an IPv6 network address to printable form.
- **
- ** Parameters:
- ** s6a -- a pointer to an in6_addr structure.
- ** dst -- buffer to store result in
- ** dst_len -- size of dst buffer
- **
- ** Returns:
- ** A printable version of that structure.
- */
- char *
- anynet_ntop(s6a, dst, dst_len)
- struct in6_addr *s6a;
- char *dst;
- size_t dst_len;
- {
- register char *ap;
- if (IN6_IS_ADDR_V4MAPPED(s6a))
- ap = (char *) inet_ntop(AF_INET,
- &s6a->s6_addr[IN6ADDRSZ - INADDRSZ],
- dst, dst_len);
- else
- ap = (char *) inet_ntop(AF_INET6, s6a, dst, dst_len);
- return ap;
- }
- #endif /* NETINET6 */
- /*
- ** ANYNET_NTOA -- convert a network address to printable form.
- **
- ** Parameters:
- ** sap -- a pointer to a sockaddr structure.
- **
- ** Returns:
- ** A printable version of that sockaddr.
- */
- #ifdef USE_SOCK_STREAM
- # if NETLINK
- # include <net/if_dl.h>
- # endif /* NETLINK */
- char *
- anynet_ntoa(sap)
- register SOCKADDR *sap;
- {
- register char *bp;
- register char *ap;
- int l;
- static char buf[100];
- /* check for null/zero family */
- if (sap == NULL)
- return "NULLADDR";
- if (sap->sa.sa_family == 0)
- return "0";
- switch (sap->sa.sa_family)
- {
- # if NETUNIX
- case AF_UNIX:
- if (sap->sunix.sun_path[0] != ' ')
- snprintf(buf, sizeof buf, "[UNIX: %.64s]",
- sap->sunix.sun_path);
- else
- snprintf(buf, sizeof buf, "[UNIX: localhost]");
- return buf;
- # endif /* NETUNIX */
- # if NETINET
- case AF_INET:
- return (char *) inet_ntoa(sap->sin.sin_addr);
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- ap = anynet_ntop(&sap->sin6.sin6_addr, buf, sizeof buf);
- if (ap != NULL)
- return ap;
- break;
- # endif /* NETINET6 */
- # if NETLINK
- case AF_LINK:
- snprintf(buf, sizeof buf, "[LINK: %s]",
- link_ntoa((struct sockaddr_dl *) &sap->sa));
- return buf;
- # endif /* NETLINK */
- default:
- /* this case is needed when nothing is #defined */
- /* in order to keep the switch syntactically correct */
- break;
- }
- /* unknown family -- just dump bytes */
- (void) snprintf(buf, sizeof buf, "Family %d: ", sap->sa.sa_family);
- bp = &buf[strlen(buf)];
- ap = sap->sa.sa_data;
- for (l = sizeof sap->sa.sa_data; --l >= 0; )
- {
- (void) snprintf(bp, SPACELEFT(buf, bp), "%02x:", *ap++ & 0377);
- bp += 3;
- }
- *--bp = ' ';
- return buf;
- }
- /*
- ** HOSTNAMEBYANYADDR -- return name of host based on address
- **
- ** Parameters:
- ** sap -- SOCKADDR pointer
- **
- ** Returns:
- ** text representation of host name.
- **
- ** Side Effects:
- ** none.
- */
- char *
- hostnamebyanyaddr(sap)
- register SOCKADDR *sap;
- {
- register struct hostent *hp;
- # if NAMED_BIND
- int saveretry;
- # endif /* NAMED_BIND */
- # if NETINET6
- struct in6_addr in6_addr;
- # endif /* NETINET6 */
- # if NAMED_BIND
- /* shorten name server timeout to avoid higher level timeouts */
- saveretry = _res.retry;
- if (_res.retry * _res.retrans > 20)
- _res.retry = 20 / _res.retrans;
- # endif /* NAMED_BIND */
- switch (sap->sa.sa_family)
- {
- # if NETINET
- case AF_INET:
- hp = sm_gethostbyaddr((char *) &sap->sin.sin_addr,
- INADDRSZ,
- AF_INET);
- break;
- # endif /* NETINET */
- # if NETINET6
- case AF_INET6:
- hp = sm_gethostbyaddr((char *) &sap->sin6.sin6_addr,
- IN6ADDRSZ,
- AF_INET6);
- break;
- # endif /* NETINET6 */
- # if NETISO
- case AF_ISO:
- hp = sm_gethostbyaddr((char *) &sap->siso.siso_addr,
- sizeof sap->siso.siso_addr,
- AF_ISO);
- break;
- # endif /* NETISO */
- # if NETUNIX
- case AF_UNIX:
- hp = NULL;
- break;
- # endif /* NETUNIX */
- default:
- hp = sm_gethostbyaddr(sap->sa.sa_data,
- sizeof sap->sa.sa_data,
- sap->sa.sa_family);
- break;
- }
- # if NAMED_BIND
- _res.retry = saveretry;
- # endif /* NAMED_BIND */
- # if NETINET || NETINET6
- if (hp != NULL && hp->h_name[0] != '['
- # if NETINET6
- && inet_pton(AF_INET6, hp->h_name, &in6_addr) != 1
- # endif /* NETINET6 */
- # if NETINET
- && inet_addr(hp->h_name) == INADDR_NONE
- # endif /* NETINET */
- )
- return denlstring((char *) hp->h_name, TRUE, TRUE);
- # endif /* NETINET || NETINET6 */
- # if NETUNIX
- if (sap->sa.sa_family == AF_UNIX && sap->sunix.sun_path[0] == ' ')
- return "localhost";
- # endif /* NETUNIX */
- {
- static char buf[203];
- (void) snprintf(buf, sizeof buf, "[%.200s]", anynet_ntoa(sap));
- return buf;
- }
- }
- #endif /* USE_SOCK_STREAM */