2 * Copyright (c) 1983, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static const char copyright[] =
36 "@(#) Copyright (c) 1983, 1991, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)from: inetd.c 8.4 (Berkeley) 4/13/94";
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
50 * Inetd - Internet super-server
52 * This program invokes all internet services as needed. Connection-oriented
53 * services are invoked each time a connection is made, by creating a process.
54 * This process is passed the connection as file descriptor 0 and is expected
55 * to do a getpeername to find out the source host and port.
57 * Datagram oriented services are invoked when a datagram
58 * arrives; a process is created and passed a pending message
59 * on file descriptor 0. Datagram servers may either connect
60 * to their peer, freeing up the original socket for inetd
61 * to receive further messages on, or ``take over the socket'',
62 * processing all arriving datagrams and, eventually, timing
63 * out. The first type of server is said to be ``multi-threaded'';
64 * the second type of server ``single-threaded''.
66 * Inetd uses a configuration file which is read at startup
67 * and, possibly, at some later time in response to a hangup signal.
68 * The configuration file is ``free format'' with fields given in the
69 * order shown below. Continuation lines for an entry must begin with
70 * a space or tab. All fields must be present in each entry.
72 * service name must be in /etc/services
73 * or name a tcpmux service
74 * or specify a unix domain socket
75 * socket type stream/dgram/raw/rdm/seqpacket
76 * protocol tcp[4][6][/faith,ttcp], udp[4][6], unix
77 * wait/nowait single-threaded/multi-threaded
78 * user user to run daemon as
79 * server program full path name
80 * server program arguments maximum of MAXARGS (20)
82 * TCP services without official port numbers are handled with the
83 * RFC1078-based tcpmux internal service. Tcpmux listens on port 1 for
84 * requests. When a connection is made from a foreign host, the service
85 * requested is passed to tcpmux, which looks it up in the servtab list
86 * and returns the proper entry for the service. Tcpmux returns a
87 * negative reply if the service doesn't exist, otherwise the invoked
88 * server is expected to return the positive reply if the service type in
89 * inetd.conf file has the prefix "tcpmux/". If the service type has the
90 * prefix "tcpmux/+", tcpmux will return the positive reply for the
91 * process; this is for compatibility with older server code, and also
92 * allows you to invoke programs that use stdin/stdout without putting any
93 * special server code in them. Services that use tcpmux are "nowait"
94 * because they do not have a well-known port and hence cannot listen
98 * service name/version must be in /etc/rpc
99 * socket type stream/dgram/raw/rdm/seqpacket
100 * protocol rpc/tcp[4][6], rpc/udp[4][6]
101 * wait/nowait single-threaded/multi-threaded
102 * user user to run daemon as
103 * server program full path name
104 * server program arguments maximum of MAXARGS
106 * Comment lines are indicated by a `#' in column 1.
109 * Comment lines that start with "#@" denote IPsec policy string, as described
110 * in ipsec_set_policy(3). This will affect all the following items in
111 * inetd.conf(8). To reset the policy, just use "#@" line. By default,
112 * there's no IPsec policy.
115 #include <sys/param.h>
116 #include <sys/ioctl.h>
117 #include <sys/wait.h>
118 #include <sys/time.h>
119 #include <sys/resource.h>
120 #include <sys/stat.h>
123 #include <netinet/in.h>
124 #include <netinet/tcp.h>
125 #include <arpa/inet.h>
127 #include <rpc/pmap_clnt.h>
143 #include <sysexits.h>
147 #include "pathnames.h"
150 #include <netinet6/ipsec.h>
151 #ifndef IPSEC_POLICY_IPSEC /* no ipsec support on old ipsec */
156 /* wrapper for KAME-special getnameinfo() */
157 #ifndef NI_WITHSCOPEID
158 #define NI_WITHSCOPEID 0
161 #ifndef LIBWRAP_ALLOW_FACILITY
162 # define LIBWRAP_ALLOW_FACILITY LOG_AUTH
164 #ifndef LIBWRAP_ALLOW_SEVERITY
165 # define LIBWRAP_ALLOW_SEVERITY LOG_INFO
167 #ifndef LIBWRAP_DENY_FACILITY
168 # define LIBWRAP_DENY_FACILITY LOG_AUTH
170 #ifndef LIBWRAP_DENY_SEVERITY
171 # define LIBWRAP_DENY_SEVERITY LOG_WARNING
174 #define ISWRAP(sep) \
175 ( ((wrap_ex && !(sep)->se_bi) || (wrap_bi && (sep)->se_bi)) \
176 && (sep->se_family == AF_INET || sep->se_family == AF_INET6) \
177 && ( ((sep)->se_accept && (sep)->se_socktype == SOCK_STREAM) \
178 || (sep)->se_socktype == SOCK_DGRAM))
181 #include <login_cap.h>
184 #define RESOURCE_RC "daemon"
189 #define MAXCHILD -1 /* maximum number of this service
194 #define MAXCPM -1 /* rate limit invocations from a
195 single remote address,
200 #define MAXPERIP -1 /* maximum number of this service
201 from a single remote address,
206 #define TOOMANY 256 /* don't start more than TOOMANY */
208 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
209 #define RETRYTIME (60*10) /* retry after bind or server fail */
210 #define MAX_MAXCHLD 32767 /* max allowable max children */
212 #define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))
214 void close_sep(struct servtab *);
215 void flag_signal(int);
216 void flag_config(int);
218 int cpmip(const struct servtab *, int);
219 void endconfig(void);
220 struct servtab *enter(struct servtab *);
221 void freeconfig(struct servtab *);
222 struct servtab *getconfigent(void);
223 int matchservent(const char *, const char *, const char *);
224 char *nextline(FILE *);
225 void addchild(struct servtab *, int);
226 void flag_reapchild(int);
227 void reapchild(void);
228 void enable(struct servtab *);
229 void disable(struct servtab *);
230 void flag_retry(int);
233 void setup(struct servtab *);
235 void ipsecsetup(struct servtab *);
237 void unregisterrpc(register struct servtab *sep);
238 static struct conninfo *search_conn(struct servtab *sep, int ctrl);
239 static int room_conn(struct servtab *sep, struct conninfo *conn);
240 static void addchild_conn(struct conninfo *conn, pid_t pid);
241 static void reapchild_conn(pid_t pid);
242 static void free_conn(struct conninfo *conn);
243 static void resize_conn(struct servtab *sep, int maxperip);
244 static void free_connlist(struct servtab *sep);
245 static void free_proc(struct procinfo *);
246 static struct procinfo *search_proc(pid_t pid, int add);
247 static int hashval(char *p, int len);
255 int maxsock; /* highest-numbered descriptor */
259 int toomany = TOOMANY;
260 int maxchild = MAXCHILD;
262 int maxperip = MAXPERIP;
265 char *hostname = NULL;
266 struct sockaddr_in *bind_sa4;
269 struct sockaddr_in6 *bind_sa6;
280 struct servtab *servtab;
282 extern struct biltin biltins[];
284 const char *CONFIG = _PATH_INETDCONF;
285 const char *pid_file = _PATH_INETDPID;
287 struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf;
289 static LIST_HEAD(, procinfo) proctable[PERIPSIZE];
292 getvalue(const char *arg, int *value, const char *whine)
297 tmp = strtol(arg, &p, 0);
299 syslog(LOG_ERR, whine, arg);
300 return 1; /* failure */
303 return 0; /* success */
307 main(int argc, char **argv)
312 struct sigaction sa, saalrm, sachld, sahup, sapipe;
313 int tmpint, ch, dofork;
317 login_cap_t *lc = NULL;
319 struct request_info req;
321 char *service = NULL;
323 struct sockaddr peer_un;
324 struct sockaddr_in peer_un4;
325 struct sockaddr_in6 peer_un6;
326 struct sockaddr_storage peer_max;
328 #define peer p_un.peer_un
329 #define peer4 p_un.peer_un4
330 #define peer6 p_un.peer_un6
331 #define peermax p_un.peer_max
333 struct addrinfo hints, *res;
334 const char *servname;
336 struct conninfo *conn;
338 openlog("inetd", LOG_PID | LOG_NOWAIT | LOG_PERROR, LOG_DAEMON);
340 while ((ch = getopt(argc, argv, "dlwWR:a:c:C:p:s:")) != -1)
350 getvalue(optarg, &toomany,
351 "-R %s: bad value for service invocation rate");
354 getvalue(optarg, &maxchild,
355 "-c %s: bad value for maximum children");
358 getvalue(optarg, &maxcpm,
359 "-C %s: bad value for maximum children/minute");
368 getvalue(optarg, &maxperip,
369 "-s %s: bad value for maximum children per source address");
380 "usage: inetd [-dlwW] [-a address] [-R rate]"
381 " [-c maximum] [-C rate]"
382 " [-p pidfile] [conf-file]");
386 * Initialize Bind Addrs.
387 * When hostname is NULL, wild card bind addrs are obtained from
388 * getaddrinfo(). But getaddrinfo() requires at least one of
389 * hostname or servname is non NULL.
390 * So when hostname is NULL, set dummy value to servname.
392 servname = (hostname == NULL) ? "discard" /* dummy */ : NULL;
394 bzero(&hints, sizeof(struct addrinfo));
395 hints.ai_flags = AI_PASSIVE;
396 hints.ai_family = AF_UNSPEC;
397 error = getaddrinfo(hostname, servname, &hints, &res);
399 syslog(LOG_ERR, "-a %s: %s", hostname, gai_strerror(error));
400 if (error == EAI_SYSTEM)
401 syslog(LOG_ERR, "%s", strerror(errno));
405 if (res->ai_addr == NULL) {
406 syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname);
409 switch (res->ai_addr->sa_family) {
413 bind_sa4 = (struct sockaddr_in *)res->ai_addr;
414 /* init port num in case servname is dummy */
415 bind_sa4->sin_port = 0;
422 bind_sa6 = (struct sockaddr_in6 *)res->ai_addr;
423 /* init port num in case servname is dummy */
424 bind_sa6->sin6_port = 0;
435 } while ((res = res->ai_next) != NULL);
441 syslog(LOG_ERR, "-a %s: unknown address family", hostname);
447 umask(mask = umask(0777));
456 if (daemon(0, 0) < 0) {
457 syslog(LOG_WARNING, "daemon(0,0) failed: %m");
459 /* From now on we don't want syslog messages going to stderr. */
461 openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON);
463 * In case somebody has started inetd manually, we need to
464 * clear the logname, so that old servers run as root do not
465 * get the user's logname..
467 if (setlogin("") < 0) {
468 syslog(LOG_WARNING, "cannot clear logname: %m");
469 /* no big deal if it fails.. */
472 fp = fopen(pid_file, "w");
474 fprintf(fp, "%ld\n", (long)pid);
477 syslog(LOG_WARNING, "%s: %m", pid_file);
481 for (i = 0; i < PERIPSIZE; ++i)
482 LIST_INIT(&proctable[i]);
485 udpconf = getnetconfigent("udp");
486 tcpconf = getnetconfigent("tcp");
487 if (udpconf == NULL || tcpconf == NULL) {
488 syslog(LOG_ERR, "unknown rpc/udp or rpc/tcp");
494 udp6conf = getnetconfigent("udp6");
495 tcp6conf = getnetconfigent("tcp6");
496 if (udp6conf == NULL || tcp6conf == NULL) {
497 syslog(LOG_ERR, "unknown rpc/udp6 or rpc/tcp6");
504 sigemptyset(&sa.sa_mask);
505 sigaddset(&sa.sa_mask, SIGALRM);
506 sigaddset(&sa.sa_mask, SIGCHLD);
507 sigaddset(&sa.sa_mask, SIGHUP);
508 sa.sa_handler = flag_retry;
509 sigaction(SIGALRM, &sa, &saalrm);
511 sa.sa_handler = flag_config;
512 sigaction(SIGHUP, &sa, &sahup);
513 sa.sa_handler = flag_reapchild;
514 sigaction(SIGCHLD, &sa, &sachld);
515 sa.sa_handler = SIG_IGN;
516 sigaction(SIGPIPE, &sa, &sapipe);
519 /* space for daemons to overwrite environment for ps */
520 #define DUMMYSIZE 100
521 char dummy[DUMMYSIZE];
523 (void)memset(dummy, 'x', DUMMYSIZE - 1);
524 dummy[DUMMYSIZE - 1] = '\0';
525 (void)setenv("inetd_dummy", dummy, 1);
528 if (pipe(signalpipe) != 0) {
529 syslog(LOG_ERR, "pipe: %m");
532 FD_SET(signalpipe[0], &allsock);
536 if (signalpipe[0] > maxsock)
537 maxsock = signalpipe[0];
538 if (signalpipe[1] > maxsock)
539 maxsock = signalpipe[1];
547 syslog(LOG_ERR, "%s: nsock=0", __FUNCTION__);
552 if ((n = select(maxsock + 1, &readable, (fd_set *)0,
553 (fd_set *)0, (struct timeval *)0)) <= 0) {
554 if (n < 0 && errno != EINTR) {
555 syslog(LOG_WARNING, "select: %m");
560 /* handle any queued signal flags */
561 if (FD_ISSET(signalpipe[0], &readable)) {
563 if (ioctl(signalpipe[0], FIONREAD, &nsig) != 0) {
564 syslog(LOG_ERR, "ioctl: %m");
567 while (--nsig >= 0) {
569 if (read(signalpipe[0], &c, 1) != 1) {
570 syslog(LOG_ERR, "read: %m");
574 warnx("handling signal flag %c", c);
576 case 'A': /* sigalrm */
579 case 'C': /* sigchld */
582 case 'H': /* sighup */
588 for (sep = servtab; n && sep; sep = sep->se_next)
589 if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
592 warnx("someone wants %s", sep->se_service);
593 dofork = !sep->se_bi || sep->se_bi->bi_fork || ISWRAP(sep);
595 if (sep->se_accept && sep->se_socktype == SOCK_STREAM) {
597 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
598 syslog(LOG_ERR, "ioctl (FIONBIO, 1): %m");
599 ctrl = accept(sep->se_fd, (struct sockaddr *)0,
602 warnx("accept, ctrl %d", ctrl);
606 "accept (for %s): %m",
608 if (sep->se_accept &&
609 sep->se_socktype == SOCK_STREAM)
614 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
615 syslog(LOG_ERR, "ioctl1(FIONBIO, 0): %m");
616 if (ioctl(ctrl, FIONBIO, &i) < 0)
617 syslog(LOG_ERR, "ioctl2(FIONBIO, 0): %m");
618 if (cpmip(sep, ctrl) < 0) {
623 (conn = search_conn(sep, ctrl)) != NULL &&
624 !room_conn(sep, conn)) {
630 if (log && !ISWRAP(sep)) {
631 char pname[INET6_ADDRSTRLEN] = "unknown";
634 if (getpeername(ctrl, (struct sockaddr *)
637 if (recvfrom(ctrl, buf, sizeof(buf),
639 (struct sockaddr *)&peermax,
641 getnameinfo((struct sockaddr *)&peermax,
643 pname, sizeof(pname),
649 getnameinfo((struct sockaddr *)&peermax,
651 pname, sizeof(pname),
656 syslog(LOG_INFO,"%s from %s", sep->se_service, pname);
658 (void) sigblock(SIGBLOCK);
661 * Fork for all external services, builtins which need to
662 * fork and anything we're wrapping (as wrapping might
663 * block or use hosts_options(5) twist).
666 if (sep->se_count++ == 0)
667 (void)gettimeofday(&sep->se_time, (struct timezone *)NULL);
668 else if (toomany > 0 && sep->se_count >= toomany) {
671 (void)gettimeofday(&now, (struct timezone *)NULL);
672 if (now.tv_sec - sep->se_time.tv_sec >
678 "%s/%s server failing (looping), service terminated",
679 sep->se_service, sep->se_proto);
680 if (sep->se_accept &&
681 sep->se_socktype == SOCK_STREAM)
696 syslog(LOG_ERR, "fork: %m");
697 if (sep->se_accept &&
698 sep->se_socktype == SOCK_STREAM)
706 addchild_conn(conn, pid);
713 warnx("+ closing from %d", maxsock);
714 for (tmpint = maxsock; tmpint > 2; tmpint--)
716 (void) close(tmpint);
717 sigaction(SIGALRM, &saalrm, (struct sigaction *)0);
718 sigaction(SIGCHLD, &sachld, (struct sigaction *)0);
719 sigaction(SIGHUP, &sahup, (struct sigaction *)0);
720 /* SIGPIPE reset before exec */
723 * Call tcpmux to find the real service to exec.
726 sep->se_bi->bi_fn == (bi_fn_t *) tcpmux) {
734 inetd_setproctitle("wrapping", ctrl);
735 service = sep->se_server_name ?
736 sep->se_server_name : sep->se_service;
737 request_init(&req, RQ_DAEMON, service, RQ_FILE, ctrl, NULL);
739 deny_severity = LIBWRAP_DENY_FACILITY|LIBWRAP_DENY_SEVERITY;
740 allow_severity = LIBWRAP_ALLOW_FACILITY|LIBWRAP_ALLOW_SEVERITY;
741 denied = !hosts_access(&req);
743 syslog(deny_severity,
744 "refused connection from %.500s, service %s (%s%s)",
745 eval_client(&req), service, sep->se_proto,
746 (((struct sockaddr *)req.client->sin)->sa_family == AF_INET6 && !IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)req.client->sin)->sin6_addr)) ? "6" : "");
747 if (sep->se_socktype != SOCK_STREAM)
748 recv(ctrl, buf, sizeof (buf), 0);
755 syslog(allow_severity,
756 "connection from %.500s, service %s (%s%s)",
757 eval_client(&req), service, sep->se_proto,
758 (((struct sockaddr *)req.client->sin)->sa_family == AF_INET6 && !IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)req.client->sin)->sin6_addr)) ? "6" : "");
762 (*sep->se_bi->bi_fn)(ctrl, sep);
766 getpid(), sep->se_server);
771 if ((pwd = getpwnam(sep->se_user)) == NULL) {
773 "%s/%s: %s: no such user",
774 sep->se_service, sep->se_proto,
776 if (sep->se_socktype != SOCK_STREAM)
777 recv(0, buf, sizeof (buf), 0);
781 if ( sep->se_group != NULL
782 && (grp = getgrnam(sep->se_group)) == NULL
785 "%s/%s: %s: no such group",
786 sep->se_service, sep->se_proto,
788 if (sep->se_socktype != SOCK_STREAM)
789 recv(0, buf, sizeof (buf), 0);
793 pwd->pw_gid = grp->gr_gid;
795 if ((lc = login_getclass(sep->se_class)) == NULL) {
796 /* error syslogged by getclass */
798 "%s/%s: %s: login class error",
799 sep->se_service, sep->se_proto,
801 if (sep->se_socktype != SOCK_STREAM)
802 recv(0, buf, sizeof (buf), 0);
808 "%s: can't setsid(): %m",
810 /* _exit(EX_OSERR); not fatal yet */
813 if (setusercontext(lc, pwd, pwd->pw_uid,
814 LOGIN_SETALL) != 0) {
816 "%s: can't setusercontext(..%s..): %m",
817 sep->se_service, sep->se_user);
822 if (setlogin(sep->se_user) < 0) {
824 "%s: can't setlogin(%s): %m",
825 sep->se_service, sep->se_user);
826 /* _exit(EX_OSERR); not yet */
828 if (setgid(pwd->pw_gid) < 0) {
830 "%s: can't set gid %d: %m",
831 sep->se_service, pwd->pw_gid);
834 (void) initgroups(pwd->pw_name,
836 if (setuid(pwd->pw_uid) < 0) {
838 "%s: can't set uid %d: %m",
839 sep->se_service, pwd->pw_uid);
844 sigaction(SIGPIPE, &sapipe,
845 (struct sigaction *)0);
846 execv(sep->se_server, sep->se_argv);
848 "cannot execute %s: %m", sep->se_server);
849 if (sep->se_socktype != SOCK_STREAM)
850 recv(0, buf, sizeof (buf), 0);
855 if (sep->se_accept && sep->se_socktype == SOCK_STREAM)
862 * Add a signal flag to the signal flag queue for later handling
870 if (write(signalpipe[1], &ch, 1) != 1) {
871 syslog(LOG_ERR, "write: %m");
877 * Record a new child pid for this service. If we've reached the
878 * limit on children, then stop accepting incoming requests.
882 addchild(struct servtab *sep, pid_t pid)
884 if (sep->se_maxchild <= 0)
887 if (sep->se_numchild >= sep->se_maxchild) {
888 syslog(LOG_ERR, "%s: %d >= %d",
889 __FUNCTION__, sep->se_numchild, sep->se_maxchild);
893 sep->se_pids[sep->se_numchild++] = pid;
894 if (sep->se_numchild == sep->se_maxchild)
899 * Some child process has exited. See if it's on somebody's list.
903 flag_reapchild(int signo __unused)
916 pid = wait3(&status, WNOHANG, (struct rusage *)0);
920 warnx("%d reaped, %s %u", pid,
921 WIFEXITED(status) ? "status" : "signal",
922 WIFEXITED(status) ? WEXITSTATUS(status)
924 for (sep = servtab; sep; sep = sep->se_next) {
925 for (k = 0; k < sep->se_numchild; k++)
926 if (sep->se_pids[k] == pid)
928 if (k == sep->se_numchild)
930 if (sep->se_numchild == sep->se_maxchild)
932 sep->se_pids[k] = sep->se_pids[--sep->se_numchild];
933 if (WIFSIGNALED(status) || WEXITSTATUS(status))
935 "%s[%d]: exited, %s %u",
937 WIFEXITED(status) ? "status" : "signal",
938 WIFEXITED(status) ? WEXITSTATUS(status)
947 flag_config(int signo __unused)
955 struct servtab *sep, *new, **sepp;
960 syslog(LOG_ERR, "%s: %m", CONFIG);
963 for (sep = servtab; sep; sep = sep->se_next)
965 while ((new = getconfigent())) {
966 if (getpwnam(new->se_user) == NULL) {
968 "%s/%s: no such user '%s', service ignored",
969 new->se_service, new->se_proto, new->se_user);
972 if (new->se_group && getgrnam(new->se_group) == NULL) {
974 "%s/%s: no such group '%s', service ignored",
975 new->se_service, new->se_proto, new->se_group);
979 if (login_getclass(new->se_class) == NULL) {
980 /* error syslogged by getclass */
982 "%s/%s: %s: login class error, service ignored",
983 new->se_service, new->se_proto, new->se_class);
987 new_nomapped = new->se_nomapped;
988 for (sep = servtab; sep; sep = sep->se_next)
989 if (strcmp(sep->se_service, new->se_service) == 0 &&
990 strcmp(sep->se_proto, new->se_proto) == 0 &&
991 sep->se_rpc == new->se_rpc &&
992 sep->se_socktype == new->se_socktype &&
993 sep->se_family == new->se_family)
998 #define SWAP(t,a, b) { t c = a; a = b; b = c; }
999 omask = sigblock(SIGBLOCK);
1000 if (sep->se_nomapped != new->se_nomapped) {
1001 /* for rpc keep old nommaped till unregister */
1003 sep->se_nomapped = new->se_nomapped;
1006 /* copy over outstanding child pids */
1007 if (sep->se_maxchild > 0 && new->se_maxchild > 0) {
1008 new->se_numchild = sep->se_numchild;
1009 if (new->se_numchild > new->se_maxchild)
1010 new->se_numchild = new->se_maxchild;
1011 memcpy(new->se_pids, sep->se_pids,
1012 new->se_numchild * sizeof(*new->se_pids));
1014 SWAP(pid_t *, sep->se_pids, new->se_pids);
1015 sep->se_maxchild = new->se_maxchild;
1016 sep->se_numchild = new->se_numchild;
1017 sep->se_maxcpm = new->se_maxcpm;
1018 resize_conn(sep, new->se_maxperip);
1019 sep->se_maxperip = new->se_maxperip;
1020 sep->se_bi = new->se_bi;
1021 /* might need to turn on or off service now */
1022 if (sep->se_fd >= 0) {
1023 if (sep->se_maxchild > 0
1024 && sep->se_numchild == sep->se_maxchild) {
1025 if (FD_ISSET(sep->se_fd, &allsock))
1028 if (!FD_ISSET(sep->se_fd, &allsock))
1032 sep->se_accept = new->se_accept;
1033 SWAP(char *, sep->se_user, new->se_user);
1034 SWAP(char *, sep->se_group, new->se_group);
1036 SWAP(char *, sep->se_class, new->se_class);
1038 SWAP(char *, sep->se_server, new->se_server);
1039 SWAP(char *, sep->se_server_name, new->se_server_name);
1040 for (i = 0; i < MAXARGV; i++)
1041 SWAP(char *, sep->se_argv[i], new->se_argv[i]);
1043 SWAP(char *, sep->se_policy, new->se_policy);
1049 print_service("REDO", sep);
1053 print_service("ADD ", sep);
1055 sep->se_checked = 1;
1060 switch (sep->se_family) {
1077 if (sep->se_family != AF_UNIX) {
1078 sp = getservbyname(sep->se_service, sep->se_proto);
1080 syslog(LOG_ERR, "%s/%s: unknown service",
1081 sep->se_service, sep->se_proto);
1082 sep->se_checked = 0;
1086 switch (sep->se_family) {
1088 if (sp->s_port != sep->se_ctrladdr4.sin_port) {
1089 sep->se_ctrladdr4.sin_port =
1097 sep->se_ctrladdr6.sin6_port) {
1098 sep->se_ctrladdr6.sin6_port =
1105 if (sep->se_reset != 0 && sep->se_fd >= 0)
1108 rpc = getrpcbyname(sep->se_service);
1110 syslog(LOG_ERR, "%s/%s unknown RPC service",
1111 sep->se_service, sep->se_proto);
1112 if (sep->se_fd != -1)
1113 (void) close(sep->se_fd);
1117 if (sep->se_reset != 0 ||
1118 rpc->r_number != sep->se_rpc_prog) {
1119 if (sep->se_rpc_prog)
1121 sep->se_rpc_prog = rpc->r_number;
1122 if (sep->se_fd != -1)
1123 (void) close(sep->se_fd);
1126 sep->se_nomapped = new_nomapped;
1129 if (sep->se_fd == -1)
1134 * Purge anything not looked at above.
1136 omask = sigblock(SIGBLOCK);
1138 while ((sep = *sepp)) {
1139 if (sep->se_checked) {
1140 sepp = &sep->se_next;
1143 *sepp = sep->se_next;
1144 if (sep->se_fd >= 0)
1147 print_service("FREE", sep);
1148 if (sep->se_rpc && sep->se_rpc_prog > 0)
1153 (void) sigsetmask(omask);
1157 unregisterrpc(struct servtab *sep)
1160 struct servtab *sepp;
1162 struct netconfig *netid4, *netid6;
1164 omask = sigblock(SIGBLOCK);
1165 netid4 = sep->se_socktype == SOCK_DGRAM ? udpconf : tcpconf;
1166 netid6 = sep->se_socktype == SOCK_DGRAM ? udp6conf : tcp6conf;
1167 if (sep->se_family == AF_INET)
1169 else if (sep->se_nomapped)
1172 * Conflict if same prog and protocol - In that case one should look
1173 * to versions, but it is not interesting: having separate servers for
1174 * different versions does not work well.
1175 * Therefore one do not unregister if there is a conflict.
1176 * There is also transport conflict if destroying INET when INET46
1177 * exists, or destroying INET46 when INET exists
1179 for (sepp = servtab; sepp; sepp = sepp->se_next) {
1182 if (sepp->se_checked == 0 ||
1184 strcmp(sep->se_proto, sepp->se_proto) != 0 ||
1185 sep->se_rpc_prog != sepp->se_rpc_prog)
1187 if (sepp->se_family == AF_INET)
1189 if (sepp->se_family == AF_INET6) {
1191 if (!sep->se_nomapped)
1194 if (netid4 == NULL && netid6 == NULL)
1198 print_service("UNREG", sep);
1199 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) {
1201 rpcb_unset(sep->se_rpc_prog, i, netid4);
1203 rpcb_unset(sep->se_rpc_prog, i, netid6);
1205 if (sep->se_fd != -1)
1206 (void) close(sep->se_fd);
1208 (void) sigsetmask(omask);
1212 flag_retry(int signo __unused)
1220 struct servtab *sep;
1223 for (sep = servtab; sep; sep = sep->se_next)
1224 if (sep->se_fd == -1 && !ISMUX(sep))
1229 setup(struct servtab *sep)
1233 if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) {
1235 warn("socket failed on %s/%s",
1236 sep->se_service, sep->se_proto);
1237 syslog(LOG_ERR, "%s/%s: socket: %m",
1238 sep->se_service, sep->se_proto);
1241 #define turnon(fd, opt) \
1242 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
1243 if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) &&
1244 turnon(sep->se_fd, SO_DEBUG) < 0)
1245 syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m");
1246 if (turnon(sep->se_fd, SO_REUSEADDR) < 0)
1247 syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
1249 if (turnon(sep->se_fd, SO_PRIVSTATE) < 0)
1250 syslog(LOG_ERR, "setsockopt (SO_PRIVSTATE): %m");
1252 /* tftpd opens a new connection then needs more infos */
1253 if ((sep->se_family == AF_INET6) &&
1254 (strcmp(sep->se_proto, "udp") == 0) &&
1255 (sep->se_accept == 0) &&
1256 (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_PKTINFO,
1257 (char *)&on, sizeof (on)) < 0))
1258 syslog(LOG_ERR, "setsockopt (IPV6_RECVPKTINFO): %m");
1259 if (sep->se_family == AF_INET6) {
1260 int flag = sep->se_nomapped ? 1 : 0;
1261 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_V6ONLY,
1262 (char *)&flag, sizeof (flag)) < 0)
1263 syslog(LOG_ERR, "setsockopt (IPV6_V6ONLY): %m");
1266 if (sep->se_type == TTCP_TYPE)
1267 if (setsockopt(sep->se_fd, IPPROTO_TCP, TCP_NOPUSH,
1268 (char *)&on, sizeof (on)) < 0)
1269 syslog(LOG_ERR, "setsockopt (TCP_NOPUSH): %m");
1271 if (sep->se_type == FAITH_TYPE) {
1272 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_FAITH, &on,
1274 syslog(LOG_ERR, "setsockopt (IPV6_FAITH): %m");
1281 if (sep->se_family == AF_UNIX) {
1282 (void) unlink(sep->se_ctrladdr_un.sun_path);
1283 umask(0777); /* Make socket with conservative permissions */
1285 if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr,
1286 sep->se_ctrladdr_size) < 0) {
1288 warn("bind failed on %s/%s",
1289 sep->se_service, sep->se_proto);
1290 syslog(LOG_ERR, "%s/%s: bind: %m",
1291 sep->se_service, sep->se_proto);
1292 (void) close(sep->se_fd);
1298 if (sep->se_family == AF_UNIX)
1302 if (sep->se_family == AF_UNIX) {
1303 /* Ick - fch{own,mod} don't work on Unix domain sockets */
1304 if (chown(sep->se_service, sep->se_sockuid, sep->se_sockgid) < 0)
1305 syslog(LOG_ERR, "chown socket: %m");
1306 if (chmod(sep->se_service, sep->se_sockmode) < 0)
1307 syslog(LOG_ERR, "chmod socket: %m");
1312 socklen_t len = sep->se_ctrladdr_size;
1313 struct netconfig *netid, *netid2 = NULL;
1314 struct sockaddr_in sock;
1315 struct netbuf nbuf, nbuf2;
1317 if (getsockname(sep->se_fd,
1318 (struct sockaddr*)&sep->se_ctrladdr, &len) < 0){
1319 syslog(LOG_ERR, "%s/%s: getsockname: %m",
1320 sep->se_service, sep->se_proto);
1321 (void) close(sep->se_fd);
1325 nbuf.buf = &sep->se_ctrladdr;
1326 nbuf.len = sep->se_ctrladdr.sa_len;
1327 if (sep->se_family == AF_INET)
1328 netid = sep->se_socktype==SOCK_DGRAM? udpconf:tcpconf;
1330 netid = sep->se_socktype==SOCK_DGRAM? udp6conf:tcp6conf;
1331 if (!sep->se_nomapped) { /* INET and INET6 */
1332 netid2 = netid==udp6conf? udpconf:tcpconf;
1333 memset(&sock, 0, sizeof sock); /* ADDR_ANY */
1335 nbuf2.len = sock.sin_len = sizeof sock;
1336 sock.sin_family = AF_INET;
1337 sock.sin_port = sep->se_ctrladdr6.sin6_port;
1341 print_service("REG ", sep);
1342 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) {
1343 rpcb_unset(sep->se_rpc_prog, i, netid);
1344 rpcb_set(sep->se_rpc_prog, i, netid, &nbuf);
1346 rpcb_unset(sep->se_rpc_prog, i, netid2);
1347 rpcb_set(sep->se_rpc_prog, i, netid2, &nbuf2);
1351 if (sep->se_socktype == SOCK_STREAM)
1352 listen(sep->se_fd, 64);
1355 warnx("registered %s on %d",
1356 sep->se_server, sep->se_fd);
1363 struct servtab *sep;
1366 char *policy_in = NULL;
1367 char *policy_out = NULL;
1371 switch (sep->se_family) {
1374 opt = IP_IPSEC_POLICY;
1378 level = IPPROTO_IPV6;
1379 opt = IPV6_IPSEC_POLICY;
1386 if (!sep->se_policy || sep->se_policy[0] == '\0') {
1387 static char def_in[] = "in entrust", def_out[] = "out entrust";
1389 policy_out = def_out;
1391 if (!strncmp("in", sep->se_policy, 2))
1392 policy_in = sep->se_policy;
1393 else if (!strncmp("out", sep->se_policy, 3))
1394 policy_out = sep->se_policy;
1396 syslog(LOG_ERR, "invalid security policy \"%s\"",
1402 if (policy_in != NULL) {
1403 buf = ipsec_set_policy(policy_in, strlen(policy_in));
1405 if (setsockopt(sep->se_fd, level, opt,
1406 buf, ipsec_get_policylen(buf)) < 0 &&
1408 warnx("%s/%s: ipsec initialization failed; %s",
1409 sep->se_service, sep->se_proto,
1413 syslog(LOG_ERR, "invalid security policy \"%s\"",
1416 if (policy_out != NULL) {
1417 buf = ipsec_set_policy(policy_out, strlen(policy_out));
1419 if (setsockopt(sep->se_fd, level, opt,
1420 buf, ipsec_get_policylen(buf)) < 0 &&
1422 warnx("%s/%s: ipsec initialization failed; %s",
1423 sep->se_service, sep->se_proto,
1427 syslog(LOG_ERR, "invalid security policy \"%s\"",
1434 * Finish with a service and its socket.
1437 close_sep(struct servtab *sep)
1439 if (sep->se_fd >= 0) {
1440 if (FD_ISSET(sep->se_fd, &allsock))
1442 (void) close(sep->se_fd);
1446 sep->se_numchild = 0; /* forget about any existing children */
1450 matchservent(const char *name1, const char *name2, const char *proto)
1455 if (strcmp(proto, "unix") == 0) {
1456 if ((p = strrchr(name1, '/')) != NULL)
1458 if ((p = strrchr(name2, '/')) != NULL)
1461 if (strcmp(name1, name2) == 0)
1463 if ((se = getservbyname(name1, proto)) != NULL) {
1464 if (strcmp(name2, se->s_name) == 0)
1466 for (alias = se->s_aliases; *alias; alias++)
1467 if (strcmp(name2, *alias) == 0)
1474 enter(struct servtab *cp)
1476 struct servtab *sep;
1479 sep = (struct servtab *)malloc(sizeof (*sep));
1480 if (sep == (struct servtab *)0) {
1481 syslog(LOG_ERR, "malloc: %m");
1486 omask = sigblock(SIGBLOCK);
1487 sep->se_next = servtab;
1494 enable(struct servtab *sep)
1498 "enabling %s, fd %d", sep->se_service, sep->se_fd);
1500 if (sep->se_fd < 0) {
1502 "%s: %s: bad fd", __FUNCTION__, sep->se_service);
1507 "%s: %s: is mux", __FUNCTION__, sep->se_service);
1510 if (FD_ISSET(sep->se_fd, &allsock)) {
1512 "%s: %s: not off", __FUNCTION__, sep->se_service);
1517 FD_SET(sep->se_fd, &allsock);
1518 if (sep->se_fd > maxsock)
1519 maxsock = sep->se_fd;
1523 disable(struct servtab *sep)
1527 "disabling %s, fd %d", sep->se_service, sep->se_fd);
1529 if (sep->se_fd < 0) {
1531 "%s: %s: bad fd", __FUNCTION__, sep->se_service);
1536 "%s: %s: is mux", __FUNCTION__, sep->se_service);
1539 if (!FD_ISSET(sep->se_fd, &allsock)) {
1541 "%s: %s: not on", __FUNCTION__, sep->se_service);
1545 syslog(LOG_ERR, "%s: nsock=0", __FUNCTION__);
1550 FD_CLR(sep->se_fd, &allsock);
1551 if (sep->se_fd == maxsock)
1555 FILE *fconfig = NULL;
1556 struct servtab serv;
1557 char line[LINE_MAX];
1563 if (fconfig != NULL) {
1564 fseek(fconfig, 0L, SEEK_SET);
1567 fconfig = fopen(CONFIG, "r");
1568 return (fconfig != NULL);
1575 (void) fclose(fconfig);
1583 struct servtab *sep = &serv;
1587 static char TCPMUX_TOKEN[] = "tcpmux/";
1588 #define MUX_LEN (sizeof(TCPMUX_TOKEN)-1)
1606 while ((cp = nextline(fconfig)) != NULL) {
1608 /* lines starting with #@ is not a comment, but the policy */
1609 if (cp[0] == '#' && cp[1] == '@') {
1611 for (p = cp + 2; p && *p && isspace(*p); p++)
1617 } else if (ipsec_get_policylen(p) >= 0) {
1623 "%s: invalid ipsec policy \"%s\"",
1629 if (*cp == '#' || *cp == '\0')
1634 return ((struct servtab *)0);
1636 * clear the static buffer, since some fields (se_ctrladdr,
1637 * for example) don't get initialized here.
1639 memset(sep, 0, sizeof *sep);
1642 /* got an empty line containing just blanks/tabs. */
1645 if (arg[0] == ':') { /* :user:group:perm: */
1646 char *user, *group, *perm;
1650 if ((group = strchr(user, ':')) == NULL) {
1651 syslog(LOG_ERR, "no group after user '%s'", user);
1655 if ((perm = strchr(group, ':')) == NULL) {
1656 syslog(LOG_ERR, "no mode after group '%s'", group);
1660 if ((pw = getpwnam(user)) == NULL) {
1661 syslog(LOG_ERR, "no such user '%s'", user);
1664 sep->se_sockuid = pw->pw_uid;
1665 if ((gr = getgrnam(group)) == NULL) {
1666 syslog(LOG_ERR, "no such user '%s'", group);
1669 sep->se_sockgid = gr->gr_gid;
1670 sep->se_sockmode = strtol(perm, &arg, 8);
1672 syslog(LOG_ERR, "bad mode '%s'", perm);
1677 sep->se_sockuid = euid;
1678 sep->se_sockgid = egid;
1679 sep->se_sockmode = 0200;
1681 if (strncmp(arg, TCPMUX_TOKEN, MUX_LEN) == 0) {
1682 char *c = arg + MUX_LEN;
1684 sep->se_type = MUXPLUS_TYPE;
1687 sep->se_type = MUX_TYPE;
1688 sep->se_service = newstr(c);
1690 sep->se_service = newstr(arg);
1691 sep->se_type = NORM_TYPE;
1694 if (strcmp(arg, "stream") == 0)
1695 sep->se_socktype = SOCK_STREAM;
1696 else if (strcmp(arg, "dgram") == 0)
1697 sep->se_socktype = SOCK_DGRAM;
1698 else if (strcmp(arg, "rdm") == 0)
1699 sep->se_socktype = SOCK_RDM;
1700 else if (strcmp(arg, "seqpacket") == 0)
1701 sep->se_socktype = SOCK_SEQPACKET;
1702 else if (strcmp(arg, "raw") == 0)
1703 sep->se_socktype = SOCK_RAW;
1705 sep->se_socktype = -1;
1708 if (strncmp(arg, "tcp", 3) == 0) {
1709 sep->se_proto = newstr(strsep(&arg, "/"));
1711 if (strcmp(arg, "ttcp") == 0)
1712 sep->se_type = TTCP_TYPE;
1713 else if (strcmp(arg, "faith") == 0)
1714 sep->se_type = FAITH_TYPE;
1717 if (sep->se_type == NORM_TYPE &&
1718 strncmp(arg, "faith/", 6) == 0) {
1720 sep->se_type = FAITH_TYPE;
1722 sep->se_proto = newstr(arg);
1724 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
1725 memmove(sep->se_proto, sep->se_proto + 4,
1726 strlen(sep->se_proto) + 1 - 4);
1728 sep->se_rpc_prog = sep->se_rpc_lowvers =
1729 sep->se_rpc_lowvers = 0;
1730 memcpy(&sep->se_ctrladdr4, bind_sa4,
1731 sizeof(sep->se_ctrladdr4));
1732 if ((versp = rindex(sep->se_service, '/'))) {
1734 switch (sscanf(versp, "%u-%u",
1735 &sep->se_rpc_lowvers,
1736 &sep->se_rpc_highvers)) {
1740 sep->se_rpc_highvers =
1741 sep->se_rpc_lowvers;
1745 "bad RPC version specifier; %s",
1752 sep->se_rpc_lowvers =
1753 sep->se_rpc_highvers = 1;
1756 sep->se_nomapped = 0;
1757 if (strcmp(sep->se_proto, "unix") == 0) {
1758 sep->se_family = AF_UNIX;
1760 while (isdigit(sep->se_proto[strlen(sep->se_proto) - 1])) {
1762 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') {
1763 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1768 if (sep->se_proto[strlen(sep->se_proto) - 1] == '4') {
1769 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1773 /* illegal version num */
1774 syslog(LOG_ERR, "bad IP version for %s", sep->se_proto);
1779 if (v6bind && !v6bind_ok) {
1780 syslog(LOG_INFO, "IPv6 bind is ignored for %s",
1782 if (v4bind && v4bind_ok)
1790 sep->se_family = AF_INET6;
1791 if (!v4bind || !v4bind_ok)
1792 sep->se_nomapped = 1;
1795 { /* default to v4 bind if not v6 bind */
1797 syslog(LOG_NOTICE, "IPv4 bind is ignored for %s",
1802 sep->se_family = AF_INET;
1806 switch(sep->se_family) {
1808 memcpy(&sep->se_ctrladdr4, bind_sa4,
1809 sizeof(sep->se_ctrladdr4));
1810 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr4);
1814 memcpy(&sep->se_ctrladdr6, bind_sa6,
1815 sizeof(sep->se_ctrladdr6));
1816 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr6);
1820 if (strlen(sep->se_service) >= sizeof(sep->se_ctrladdr_un.sun_path)) {
1822 "domain socket pathname too long for service %s",
1826 memset(&sep->se_ctrladdr, 0, sizeof(sep->se_ctrladdr));
1827 sep->se_ctrladdr_un.sun_family = sep->se_family;
1828 sep->se_ctrladdr_un.sun_len = strlen(sep->se_service);
1829 strcpy(sep->se_ctrladdr_un.sun_path, sep->se_service);
1830 sep->se_ctrladdr_size = SUN_LEN(&sep->se_ctrladdr_un);
1833 if (!strncmp(arg, "wait", 4))
1835 else if (!strncmp(arg, "nowait", 6))
1839 "%s: bad wait/nowait for service %s",
1840 CONFIG, sep->se_service);
1843 sep->se_maxchild = -1;
1844 sep->se_maxcpm = -1;
1845 sep->se_maxperip = -1;
1846 if ((s = strchr(arg, '/')) != NULL) {
1850 val = strtoul(s + 1, &eptr, 10);
1851 if (eptr == s + 1 || val > MAX_MAXCHLD) {
1853 "%s: bad max-child for service %s",
1854 CONFIG, sep->se_service);
1858 if (!sep->se_accept && val != 1)
1859 warnx("maxchild=%lu for wait service %s"
1860 " not recommended", val, sep->se_service);
1861 sep->se_maxchild = val;
1863 sep->se_maxcpm = strtol(eptr + 1, &eptr, 10);
1865 sep->se_maxperip = strtol(eptr + 1, &eptr, 10);
1867 * explicitly do not check for \0 for future expansion /
1868 * backwards compatibility
1873 * Silently enforce "nowait" mode for TCPMUX services
1874 * since they don't have an assigned port to listen on.
1877 if (strcmp(sep->se_proto, "tcp")) {
1879 "%s: bad protocol for tcpmux service %s",
1880 CONFIG, sep->se_service);
1883 if (sep->se_socktype != SOCK_STREAM) {
1885 "%s: bad socket type for tcpmux service %s",
1886 CONFIG, sep->se_service);
1890 sep->se_user = newstr(sskip(&cp));
1892 if ((s = strrchr(sep->se_user, '/')) != NULL) {
1894 sep->se_class = newstr(s + 1);
1896 sep->se_class = newstr(RESOURCE_RC);
1898 if ((s = strrchr(sep->se_user, ':')) != NULL) {
1900 sep->se_group = newstr(s + 1);
1902 sep->se_group = NULL;
1903 sep->se_server = newstr(sskip(&cp));
1904 if ((sep->se_server_name = rindex(sep->se_server, '/')))
1905 sep->se_server_name++;
1906 if (strcmp(sep->se_server, "internal") == 0) {
1909 for (bi = biltins; bi->bi_service; bi++)
1910 if (bi->bi_socktype == sep->se_socktype &&
1911 matchservent(bi->bi_service, sep->se_service,
1914 if (bi->bi_service == 0) {
1915 syslog(LOG_ERR, "internal service %s unknown",
1919 sep->se_accept = 1; /* force accept mode for built-ins */
1923 if (sep->se_maxperip < 0)
1924 sep->se_maxperip = maxperip;
1925 if (sep->se_maxcpm < 0)
1926 sep->se_maxcpm = maxcpm;
1927 if (sep->se_maxchild < 0) { /* apply default max-children */
1928 if (sep->se_bi && sep->se_bi->bi_maxchild >= 0)
1929 sep->se_maxchild = sep->se_bi->bi_maxchild;
1930 else if (sep->se_accept)
1931 sep->se_maxchild = maxchild > 0 ? maxchild : 0;
1933 sep->se_maxchild = 1;
1935 if (sep->se_maxchild > 0) {
1936 sep->se_pids = malloc(sep->se_maxchild * sizeof(*sep->se_pids));
1937 if (sep->se_pids == NULL) {
1938 syslog(LOG_ERR, "malloc: %m");
1943 for (arg = skip(&cp); cp; arg = skip(&cp))
1944 if (argc < MAXARGV) {
1945 sep->se_argv[argc++] = newstr(arg);
1948 "%s: too many arguments for service %s",
1949 CONFIG, sep->se_service);
1952 while (argc <= MAXARGV)
1953 sep->se_argv[argc++] = NULL;
1954 for (i = 0; i < PERIPSIZE; ++i)
1955 LIST_INIT(&sep->se_conn[i]);
1957 sep->se_policy = policy ? newstr(policy) : NULL;
1963 freeconfig(struct servtab *cp)
1968 free(cp->se_service);
1980 free(cp->se_server);
1983 for (i = 0; i < MAXARGV; i++)
1985 free(cp->se_argv[i]);
1989 free(cp->se_policy);
1995 * Safe skip - if skip returns null, log a syntax error in the
1996 * configuration file and exit.
2005 syslog(LOG_ERR, "%s: syntax error", CONFIG);
2019 while (*cp == ' ' || *cp == '\t')
2025 (void) ungetc(c, fconfig);
2026 if (c == ' ' || c == '\t')
2027 if ((cp = nextline(fconfig)))
2032 if (*cp == '"' || *cp == '\'')
2036 while (*cp && *cp != quote)
2039 while (*cp && *cp != ' ' && *cp != '\t')
2052 if (fgets(line, sizeof (line), fd) == NULL)
2054 cp = strchr(line, '\n');
2061 newstr(const char *cp)
2065 if ((cr = strdup(cp != NULL ? cp : "")))
2067 syslog(LOG_ERR, "strdup: %m");
2072 inetd_setproctitle(const char *a, int s)
2075 struct sockaddr_storage ss;
2076 char buf[80], pbuf[INET6_ADDRSTRLEN];
2079 if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) {
2080 getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf),
2081 NULL, 0, NI_NUMERICHOST|NI_WITHSCOPEID);
2082 (void) sprintf(buf, "%s [%s]", a, pbuf);
2084 (void) sprintf(buf, "%s", a);
2085 setproctitle("%s", buf);
2089 check_loop(const struct sockaddr *sa, const struct servtab *sep)
2091 struct servtab *se2;
2092 char pname[INET6_ADDRSTRLEN];
2094 for (se2 = servtab; se2; se2 = se2->se_next) {
2095 if (!se2->se_bi || se2->se_socktype != SOCK_DGRAM)
2098 switch (se2->se_family) {
2100 if (((const struct sockaddr_in *)sa)->sin_port ==
2101 se2->se_ctrladdr4.sin_port)
2106 if (((const struct sockaddr_in *)sa)->sin_port ==
2107 se2->se_ctrladdr4.sin_port)
2115 getnameinfo(sa, sa->sa_len, pname, sizeof(pname), NULL, 0,
2116 NI_NUMERICHOST|NI_WITHSCOPEID);
2117 syslog(LOG_WARNING, "%s/%s:%s/%s loop request REFUSED from %s",
2118 sep->se_service, sep->se_proto,
2119 se2->se_service, se2->se_proto,
2128 * Dump relevant information to stderr
2131 print_service(const char *action, const struct servtab *sep)
2134 "%s: %s proto=%s accept=%d max=%d user=%s group=%s"
2138 " builtin=%p server=%s"
2143 action, sep->se_service, sep->se_proto,
2144 sep->se_accept, sep->se_maxchild, sep->se_user, sep->se_group,
2148 (void *) sep->se_bi, sep->se_server
2150 , (sep->se_policy ? sep->se_policy : "")
2155 #define CPMHSIZE 256
2156 #define CPMHMASK (CPMHSIZE-1)
2160 typedef struct CTime {
2161 unsigned long ct_Ticks;
2165 typedef struct CHash {
2167 struct in_addr c4_Addr;
2168 struct in6_addr c6_Addr;
2170 #define ch_Addr4 cu_Addr.c4_Addr
2171 #define ch_Addr6 cu_Addr.c6_Addr
2175 CTime ch_Times[CHTSIZE];
2178 CHash CHashAry[CPMHSIZE];
2181 cpmip(const struct servtab *sep, int ctrl)
2183 struct sockaddr_storage rss;
2184 socklen_t rssLen = sizeof(rss);
2188 * If getpeername() fails, just let it through (if logging is
2189 * enabled the condition is caught elsewhere)
2192 if (sep->se_maxcpm > 0 &&
2193 getpeername(ctrl, (struct sockaddr *)&rss, &rssLen) == 0 ) {
2194 time_t t = time(NULL);
2195 int hv = 0xABC3D20F;
2198 CHash *chBest = NULL;
2199 unsigned int ticks = t / CHTGRAN;
2200 struct sockaddr_in *sin4;
2202 struct sockaddr_in6 *sin6;
2205 sin4 = (struct sockaddr_in *)&rss;
2207 sin6 = (struct sockaddr_in6 *)&rss;
2213 switch (rss.ss_family) {
2215 p = (char *)&sin4->sin_addr;
2216 addrlen = sizeof(struct in_addr);
2220 p = (char *)&sin6->sin6_addr;
2221 addrlen = sizeof(struct in6_addr);
2225 /* should not happen */
2229 for (i = 0; i < addrlen; ++i, ++p) {
2230 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2232 hv = (hv ^ (hv >> 16));
2234 for (i = 0; i < 5; ++i) {
2235 CHash *ch = &CHashAry[(hv + i) & CPMHMASK];
2237 if (rss.ss_family == AF_INET &&
2238 ch->ch_Family == AF_INET &&
2239 sin4->sin_addr.s_addr == ch->ch_Addr4.s_addr &&
2240 ch->ch_Service && strcmp(sep->se_service,
2241 ch->ch_Service) == 0) {
2246 if (rss.ss_family == AF_INET6 &&
2247 ch->ch_Family == AF_INET6 &&
2248 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2249 &ch->ch_Addr6) != 0 &&
2250 ch->ch_Service && strcmp(sep->se_service,
2251 ch->ch_Service) == 0) {
2256 if (chBest == NULL || ch->ch_LTime == 0 ||
2257 ch->ch_LTime < chBest->ch_LTime) {
2261 if ((rss.ss_family == AF_INET &&
2262 (chBest->ch_Family != AF_INET ||
2263 sin4->sin_addr.s_addr != chBest->ch_Addr4.s_addr)) ||
2264 chBest->ch_Service == NULL ||
2265 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2266 chBest->ch_Family = sin4->sin_family;
2267 chBest->ch_Addr4 = sin4->sin_addr;
2268 if (chBest->ch_Service)
2269 free(chBest->ch_Service);
2270 chBest->ch_Service = strdup(sep->se_service);
2271 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2274 if ((rss.ss_family == AF_INET6 &&
2275 (chBest->ch_Family != AF_INET6 ||
2276 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2277 &chBest->ch_Addr6) == 0)) ||
2278 chBest->ch_Service == NULL ||
2279 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2280 chBest->ch_Family = sin6->sin6_family;
2281 chBest->ch_Addr6 = sin6->sin6_addr;
2282 if (chBest->ch_Service)
2283 free(chBest->ch_Service);
2284 chBest->ch_Service = strdup(sep->se_service);
2285 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2288 chBest->ch_LTime = t;
2290 CTime *ct = &chBest->ch_Times[ticks % CHTSIZE];
2291 if (ct->ct_Ticks != ticks) {
2292 ct->ct_Ticks = ticks;
2297 for (i = 0; i < CHTSIZE; ++i) {
2298 CTime *ct = &chBest->ch_Times[i];
2299 if (ct->ct_Ticks <= ticks &&
2300 ct->ct_Ticks >= ticks - CHTSIZE) {
2301 cnt += ct->ct_Count;
2304 if (cnt * (CHTSIZE * CHTGRAN) / 60 > sep->se_maxcpm) {
2305 char pname[INET6_ADDRSTRLEN];
2307 getnameinfo((struct sockaddr *)&rss,
2308 ((struct sockaddr *)&rss)->sa_len,
2309 pname, sizeof(pname), NULL, 0,
2310 NI_NUMERICHOST|NI_WITHSCOPEID);
2313 "%s from %s exceeded counts/min (limit %d/min)",
2314 sep->se_service, pname,
2321 static struct conninfo *
2322 search_conn(struct servtab *sep, int ctrl)
2324 struct sockaddr_storage ss;
2325 socklen_t sslen = sizeof(ss);
2326 struct conninfo *conn;
2328 char pname[NI_MAXHOST], pname2[NI_MAXHOST];
2330 if (sep->se_maxperip <= 0)
2334 * If getpeername() fails, just let it through (if logging is
2335 * enabled the condition is caught elsewhere)
2337 if (getpeername(ctrl, (struct sockaddr *)&ss, &sslen) != 0)
2340 switch (ss.ss_family) {
2342 hv = hashval((char *)&((struct sockaddr_in *)&ss)->sin_addr,
2343 sizeof(struct in_addr));
2347 hv = hashval((char *)&((struct sockaddr_in6 *)&ss)->sin6_addr,
2348 sizeof(struct in6_addr));
2353 * Since we only support AF_INET and AF_INET6, just
2354 * let other than AF_INET and AF_INET6 through.
2359 if (getnameinfo((struct sockaddr *)&ss, sslen, pname, sizeof(pname),
2360 NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
2363 LIST_FOREACH(conn, &sep->se_conn[hv], co_link) {
2364 if (getnameinfo((struct sockaddr *)&conn->co_addr,
2365 conn->co_addr.ss_len, pname2, sizeof(pname2), NULL, 0,
2366 NI_NUMERICHOST | NI_WITHSCOPEID) == 0 &&
2367 strcmp(pname, pname2) == 0)
2372 if ((conn = malloc(sizeof(struct conninfo))) == NULL) {
2373 syslog(LOG_ERR, "malloc: %m");
2376 conn->co_proc = malloc(sep->se_maxperip * sizeof(*conn->co_proc));
2377 if (conn->co_proc == NULL) {
2378 syslog(LOG_ERR, "malloc: %m");
2381 memcpy(&conn->co_addr, (struct sockaddr *)&ss, sslen);
2382 conn->co_numchild = 0;
2383 LIST_INSERT_HEAD(&sep->se_conn[hv], conn, co_link);
2387 * Since a child process is not invoked yet, we cannot
2388 * determine a pid of a child. So, co_proc and co_numchild
2389 * should be filled leter.
2396 room_conn(struct servtab *sep, struct conninfo *conn)
2398 char pname[NI_MAXHOST];
2400 if (conn->co_numchild >= sep->se_maxperip) {
2401 getnameinfo((struct sockaddr *)&conn->co_addr,
2402 conn->co_addr.ss_len, pname, sizeof(pname), NULL, 0,
2403 NI_NUMERICHOST | NI_WITHSCOPEID);
2404 syslog(LOG_ERR, "%s from %s exceeded counts (limit %d)",
2405 sep->se_service, pname, sep->se_maxperip);
2412 addchild_conn(struct conninfo *conn, pid_t pid)
2414 struct procinfo *proc;
2419 if ((proc = search_proc(pid, 1)) != NULL) {
2420 if (proc->pr_conn != NULL) {
2422 "addchild_conn: child already on process list");
2425 proc->pr_conn = conn;
2428 conn->co_proc[conn->co_numchild++] = proc;
2432 reapchild_conn(pid_t pid)
2434 struct procinfo *proc;
2435 struct conninfo *conn;
2438 if ((proc = search_proc(pid, 0)) == NULL)
2440 if ((conn = proc->pr_conn) == NULL)
2442 for (i = 0; i < conn->co_numchild; ++i)
2443 if (conn->co_proc[i] == proc) {
2444 conn->co_proc[i] = conn->co_proc[--conn->co_numchild];
2452 resize_conn(struct servtab *sep, int maxpip)
2454 struct conninfo *conn;
2457 if (sep->se_maxperip <= 0)
2463 for (i = 0; i < PERIPSIZE; ++i) {
2464 LIST_FOREACH(conn, &sep->se_conn[i], co_link) {
2465 for (j = maxpip; j < conn->co_numchild; ++j)
2466 free_proc(conn->co_proc[j]);
2467 conn->co_proc = realloc(conn->co_proc,
2468 maxpip * sizeof(*conn->co_proc));
2469 if (conn->co_proc == NULL) {
2470 syslog(LOG_ERR, "realloc: %m");
2473 if (conn->co_numchild > maxpip)
2474 conn->co_numchild = maxpip;
2480 free_connlist(struct servtab *sep)
2482 struct conninfo *conn;
2485 for (i = 0; i < PERIPSIZE; ++i) {
2486 while ((conn = LIST_FIRST(&sep->se_conn[i])) != NULL) {
2487 for (j = 0; j < conn->co_numchild; ++j)
2488 free_proc(conn->co_proc[j]);
2489 conn->co_numchild = 0;
2496 free_conn(struct conninfo *conn)
2500 if (conn->co_numchild <= 0) {
2501 LIST_REMOVE(conn, co_link);
2502 free(conn->co_proc);
2507 static struct procinfo *
2508 search_proc(pid_t pid, int add)
2510 struct procinfo *proc;
2513 hv = hashval((char *)&pid, sizeof(pid));
2514 LIST_FOREACH(proc, &proctable[hv], pr_link) {
2515 if (proc->pr_pid == pid)
2518 if (proc == NULL && add) {
2519 if ((proc = malloc(sizeof(struct procinfo))) == NULL) {
2520 syslog(LOG_ERR, "malloc: %m");
2524 proc->pr_conn = NULL;
2525 LIST_INSERT_HEAD(&proctable[hv], proc, pr_link);
2531 free_proc(struct procinfo *proc)
2535 LIST_REMOVE(proc, pr_link);
2540 hashval(char *p, int len)
2542 int i, hv = 0xABC3D20F;
2544 for (i = 0; i < len; ++i, ++p)
2545 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2546 hv = (hv ^ (hv >> 16)) & (PERIPSIZE - 1);