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
33 * @(#) Copyright (c) 1983, 1991, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)from: inetd.c 8.4 (Berkeley) 4/13/94
35 * $FreeBSD: src/usr.sbin/inetd/inetd.c,v 1.80.2.11 2003/04/05 13:39:18 dwmalone Exp $
36 * $DragonFly: src/usr.sbin/inetd/inetd.c,v 1.11 2008/05/23 23:40:59 swildner Exp $
40 * Inetd - Internet super-server
42 * This program invokes all internet services as needed. Connection-oriented
43 * services are invoked each time a connection is made, by creating a process.
44 * This process is passed the connection as file descriptor 0 and is expected
45 * to do a getpeername to find out the source host and port.
47 * Datagram oriented services are invoked when a datagram
48 * arrives; a process is created and passed a pending message
49 * on file descriptor 0. Datagram servers may either connect
50 * to their peer, freeing up the original socket for inetd
51 * to receive further messages on, or ``take over the socket'',
52 * processing all arriving datagrams and, eventually, timing
53 * out. The first type of server is said to be ``multi-threaded'';
54 * the second type of server ``single-threaded''.
56 * Inetd uses a configuration file which is read at startup
57 * and, possibly, at some later time in response to a hangup signal.
58 * The configuration file is ``free format'' with fields given in the
59 * order shown below. Continuation lines for an entry must begin with
60 * a space or tab. All fields must be present in each entry.
62 * service name must be in /etc/services
63 * or name a tcpmux service
64 * or specify a unix domain socket
65 * socket type stream/dgram/raw/rdm/seqpacket
66 * protocol tcp[4][6][/faith,ttcp], udp[4][6], unix
67 * wait/nowait single-threaded/multi-threaded
68 * user user to run daemon as
69 * server program full path name
70 * server program arguments maximum of MAXARGS (20)
72 * TCP services without official port numbers are handled with the
73 * RFC1078-based tcpmux internal service. Tcpmux listens on port 1 for
74 * requests. When a connection is made from a foreign host, the service
75 * requested is passed to tcpmux, which looks it up in the servtab list
76 * and returns the proper entry for the service. Tcpmux returns a
77 * negative reply if the service doesn't exist, otherwise the invoked
78 * server is expected to return the positive reply if the service type in
79 * inetd.conf file has the prefix "tcpmux/". If the service type has the
80 * prefix "tcpmux/+", tcpmux will return the positive reply for the
81 * process; this is for compatibility with older server code, and also
82 * allows you to invoke programs that use stdin/stdout without putting any
83 * special server code in them. Services that use tcpmux are "nowait"
84 * because they do not have a well-known port and hence cannot listen
88 * service name/version must be in /etc/rpc
89 * socket type stream/dgram/raw/rdm/seqpacket
90 * protocol rpc/tcp, rpc/udp
91 * wait/nowait single-threaded/multi-threaded
92 * user user to run daemon as
93 * server program full path name
94 * server program arguments maximum of MAXARGS
96 * Comment lines are indicated by a `#' in column 1.
99 * Comment lines that start with "#@" denote IPsec policy string, as described
100 * in ipsec_set_policy(3). This will affect all the following items in
101 * inetd.conf(8). To reset the policy, just use "#@" line. By default,
102 * there's no IPsec policy.
105 #include <sys/param.h>
106 #include <sys/ioctl.h>
107 #include <sys/wait.h>
108 #include <sys/time.h>
109 #include <sys/resource.h>
110 #include <sys/stat.h>
113 #include <netinet/in.h>
114 #include <netinet/tcp.h>
115 #include <arpa/inet.h>
117 #include <rpc/pmap_clnt.h>
134 #include <sysexits.h>
138 #include "pathnames.h"
141 #include <netinet6/ipsec.h>
142 #ifndef IPSEC_POLICY_IPSEC /* no ipsec support on old ipsec */
147 /* wrapper for KAME-special getnameinfo() */
148 #ifndef NI_WITHSCOPEID
149 #define NI_WITHSCOPEID 0
152 #ifndef LIBWRAP_ALLOW_FACILITY
153 # define LIBWRAP_ALLOW_FACILITY LOG_AUTH
155 #ifndef LIBWRAP_ALLOW_SEVERITY
156 # define LIBWRAP_ALLOW_SEVERITY LOG_INFO
158 #ifndef LIBWRAP_DENY_FACILITY
159 # define LIBWRAP_DENY_FACILITY LOG_AUTH
161 #ifndef LIBWRAP_DENY_SEVERITY
162 # define LIBWRAP_DENY_SEVERITY LOG_WARNING
165 #define ISWRAP(sep) \
166 ( ((wrap_ex && !(sep)->se_bi) || (wrap_bi && (sep)->se_bi)) \
167 && (sep->se_family == AF_INET || sep->se_family == AF_INET6) \
168 && ( ((sep)->se_accept && (sep)->se_socktype == SOCK_STREAM) \
169 || (sep)->se_socktype == SOCK_DGRAM))
172 #include <login_cap.h>
175 #define RESOURCE_RC "daemon"
180 #define MAXCHILD -1 /* maximum number of this service
185 #define MAXCPM -1 /* rate limit invocations from a
186 single remote address,
191 #define MAXPERIP -1 /* maximum number of this service
192 from a single remote address,
197 #define TOOMANY 256 /* don't start more than TOOMANY */
199 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
200 #define RETRYTIME (60*10) /* retry after bind or server fail */
201 #define MAX_MAXCHLD 32767 /* max allowable max children */
203 #define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))
205 void close_sep(struct servtab *);
206 void flag_signal(int);
207 void flag_config(int);
209 int cpmip(const struct servtab *, int);
210 void endconfig(void);
211 struct servtab *enter(struct servtab *);
212 void freeconfig(struct servtab *);
213 struct servtab *getconfigent(void);
214 int matchservent(const char *, const char *, const char *);
215 char *nextline(FILE *);
216 void addchild(struct servtab *, int);
217 void flag_reapchild(int);
218 void reapchild(void);
219 void enable(struct servtab *);
220 void disable(struct servtab *);
221 void flag_retry(int);
224 void setup(struct servtab *);
226 void ipsecsetup(struct servtab *);
228 void unregisterrpc(struct servtab *sep);
229 static struct conninfo *search_conn(struct servtab *sep, int ctrl);
230 static int room_conn(struct servtab *sep, struct conninfo *conn);
231 static void addchild_conn(struct conninfo *conn, pid_t pid);
232 static void reapchild_conn(pid_t pid);
233 static void free_conn(struct conninfo *conn);
234 static void resize_conn(struct servtab *sep, int maxperip);
235 static void free_connlist(struct servtab *sep);
236 static void free_proc(struct procinfo *);
237 static struct procinfo *search_proc(pid_t pid, int add);
238 static int hashval(char *p, int len);
246 int maxsock; /* highest-numbered descriptor */
250 int toomany = TOOMANY;
251 int maxchild = MAXCHILD;
253 int maxperip = MAXPERIP;
256 char *hostname = NULL;
257 struct sockaddr_in *bind_sa4;
260 struct sockaddr_in6 *bind_sa6;
271 struct servtab *servtab;
273 extern struct biltin biltins[];
275 #define NUMINT (sizeof(intab) / sizeof(struct inent))
276 const char *CONFIG = _PATH_INETDCONF;
277 const char *pid_file = _PATH_INETDPID;
279 static LIST_HEAD(, procinfo) proctable[PERIPSIZE];
282 getvalue(const char *arg, int *value, const char *whine)
287 tmp = strtol(arg, &p, 0);
289 syslog(LOG_ERR, whine, arg);
290 return 1; /* failure */
293 return 0; /* success */
297 whichaf(struct request_info *req)
301 sa = (struct sockaddr *)req->client->sin;
304 if (sa->sa_family == AF_INET6 &&
305 IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)sa)->sin6_addr))
307 return sa->sa_family;
311 main(int argc, char **argv)
316 struct sigaction sa, saalrm, sachld, sahup, sapipe;
321 login_cap_t *lc = NULL;
323 struct request_info req;
325 char *service = NULL;
327 struct sockaddr peer_un;
328 struct sockaddr_in peer_un4;
329 struct sockaddr_in6 peer_un6;
330 struct sockaddr_storage peer_max;
332 #define peer p_un.peer_un
333 #define peer4 p_un.peer_un4
334 #define peer6 p_un.peer_un6
335 #define peermax p_un.peer_max
337 struct addrinfo hints, *res;
338 const char *servname;
340 struct conninfo *conn;
342 openlog("inetd", LOG_PID | LOG_NOWAIT | LOG_PERROR, LOG_DAEMON);
344 while ((ch = getopt(argc, argv, "dlwWR:a:c:C:p:s:")) != -1)
354 getvalue(optarg, &toomany,
355 "-R %s: bad value for service invocation rate");
358 getvalue(optarg, &maxchild,
359 "-c %s: bad value for maximum children");
362 getvalue(optarg, &maxcpm,
363 "-C %s: bad value for maximum children/minute");
372 getvalue(optarg, &maxperip,
373 "-s %s: bad value for maximum children per source address");
384 "usage: inetd [-dlwW] [-a address] [-R rate]"
385 " [-c maximum] [-C rate]"
386 " [-p pidfile] [conf-file]");
390 * Initialize Bind Addrs.
391 * When hostname is NULL, wild card bind addrs are obtained from
392 * getaddrinfo(). But getaddrinfo() requires at least one of
393 * hostname or servname is non NULL.
394 * So when hostname is NULL, set dummy value to servname.
396 servname = (hostname == NULL) ? "discard" /* dummy */ : NULL;
398 bzero(&hints, sizeof(struct addrinfo));
399 hints.ai_flags = AI_PASSIVE;
400 hints.ai_family = AF_UNSPEC;
401 error = getaddrinfo(hostname, servname, &hints, &res);
403 syslog(LOG_ERR, "-a %s: %s", hostname, gai_strerror(error));
404 if (error == EAI_SYSTEM)
405 syslog(LOG_ERR, "%s", strerror(errno));
409 if (res->ai_addr == NULL) {
410 syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname);
413 switch (res->ai_addr->sa_family) {
417 bind_sa4 = (struct sockaddr_in *)res->ai_addr;
418 /* init port num in case servname is dummy */
419 bind_sa4->sin_port = 0;
426 bind_sa6 = (struct sockaddr_in6 *)res->ai_addr;
427 /* init port num in case servname is dummy */
428 bind_sa6->sin6_port = 0;
439 } while ((res = res->ai_next) != NULL);
445 syslog(LOG_ERR, "-a %s: unknown address family", hostname);
451 umask(mask = umask(0777));
460 if (daemon(0, 0) < 0) {
461 syslog(LOG_WARNING, "daemon(0,0) failed: %m");
463 /* From now on we don't want syslog messages going to stderr. */
465 openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON);
467 * In case somebody has started inetd manually, we need to
468 * clear the logname, so that old servers run as root do not
469 * get the user's logname..
471 if (setlogin("") < 0) {
472 syslog(LOG_WARNING, "cannot clear logname: %m");
473 /* no big deal if it fails.. */
476 fp = fopen(pid_file, "w");
478 fprintf(fp, "%ld\n", (long)pid);
481 syslog(LOG_WARNING, "%s: %m", pid_file);
484 for (i = 0; i < PERIPSIZE; ++i)
485 LIST_INIT(&proctable[i]);
487 sigemptyset(&sa.sa_mask);
488 sigaddset(&sa.sa_mask, SIGALRM);
489 sigaddset(&sa.sa_mask, SIGCHLD);
490 sigaddset(&sa.sa_mask, SIGHUP);
491 sa.sa_handler = flag_retry;
492 sigaction(SIGALRM, &sa, &saalrm);
494 sa.sa_handler = flag_config;
495 sigaction(SIGHUP, &sa, &sahup);
496 sa.sa_handler = flag_reapchild;
497 sigaction(SIGCHLD, &sa, &sachld);
498 sa.sa_handler = SIG_IGN;
499 sigaction(SIGPIPE, &sa, &sapipe);
502 /* space for daemons to overwrite environment for ps */
503 #define DUMMYSIZE 100
504 char dummy[DUMMYSIZE];
506 memset(dummy, 'x', DUMMYSIZE - 1);
507 dummy[DUMMYSIZE - 1] = '\0';
508 if (setenv("inetd_dummy", dummy, 1) == -1)
509 syslog(LOG_WARNING, "setenv: cannot set inetd_dummy=%s: %m", dummy);
513 if (pipe(signalpipe) != 0) {
514 syslog(LOG_ERR, "pipe: %m");
517 if (fcntl(signalpipe[0], F_SETFD, FD_CLOEXEC) < 0 ||
518 fcntl(signalpipe[1], F_SETFD, FD_CLOEXEC) < 0) {
519 syslog(LOG_ERR, "signalpipe: fcntl (F_SETFD, FD_CLOEXEC): %m");
522 FD_SET(signalpipe[0], &allsock);
526 if (signalpipe[0] > maxsock)
527 maxsock = signalpipe[0];
528 if (signalpipe[1] > maxsock)
529 maxsock = signalpipe[1];
537 syslog(LOG_ERR, "%s: nsock=0", __func__);
542 if ((n = select(maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
543 if (n < 0 && errno != EINTR) {
544 syslog(LOG_WARNING, "select: %m");
549 /* handle any queued signal flags */
550 if (FD_ISSET(signalpipe[0], &readable)) {
552 if (ioctl(signalpipe[0], FIONREAD, &nsig) != 0) {
553 syslog(LOG_ERR, "ioctl: %m");
556 while (--nsig >= 0) {
558 if (read(signalpipe[0], &c, 1) != 1) {
559 syslog(LOG_ERR, "read: %m");
563 warnx("handling signal flag %c", c);
565 case 'A': /* sigalrm */
568 case 'C': /* sigchld */
571 case 'H': /* sighup */
577 for (sep = servtab; n && sep; sep = sep->se_next)
578 if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
581 warnx("someone wants %s", sep->se_service);
582 dofork = !sep->se_bi || sep->se_bi->bi_fork || ISWRAP(sep);
584 if (sep->se_accept && sep->se_socktype == SOCK_STREAM) {
586 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
587 syslog(LOG_ERR, "ioctl (FIONBIO, 1): %m");
588 ctrl = accept(sep->se_fd, NULL, NULL);
590 warnx("accept, ctrl %d", ctrl);
594 "accept (for %s): %m",
596 if (sep->se_accept &&
597 sep->se_socktype == SOCK_STREAM)
602 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
603 syslog(LOG_ERR, "ioctl1(FIONBIO, 0): %m");
604 if (ioctl(ctrl, FIONBIO, &i) < 0)
605 syslog(LOG_ERR, "ioctl2(FIONBIO, 0): %m");
606 if (cpmip(sep, ctrl) < 0) {
611 (conn = search_conn(sep, ctrl)) != NULL &&
612 !room_conn(sep, conn)) {
618 if (dolog && !ISWRAP(sep)) {
619 char pname[INET6_ADDRSTRLEN] = "unknown";
622 if (getpeername(ctrl, (struct sockaddr *)
625 if (recvfrom(ctrl, buf, sizeof(buf),
627 (struct sockaddr *)&peermax,
629 getnameinfo((struct sockaddr *)&peermax,
631 pname, sizeof(pname),
637 getnameinfo((struct sockaddr *)&peermax,
639 pname, sizeof(pname),
644 syslog(LOG_INFO,"%s from %s", sep->se_service, pname);
649 * Fork for all external services, builtins which need to
650 * fork and anything we're wrapping (as wrapping might
651 * block or use hosts_options(5) twist).
654 if (sep->se_count++ == 0)
655 gettimeofday(&sep->se_time, NULL);
656 else if (toomany > 0 && sep->se_count >= toomany) {
659 gettimeofday(&now, NULL);
660 if (now.tv_sec - sep->se_time.tv_sec >
666 "%s/%s server failing (looping), service terminated",
667 sep->se_service, sep->se_proto);
668 if (sep->se_accept &&
669 sep->se_socktype == SOCK_STREAM)
684 syslog(LOG_ERR, "fork: %m");
685 if (sep->se_accept &&
686 sep->se_socktype == SOCK_STREAM)
694 addchild_conn(conn, pid);
700 sigaction(SIGALRM, &saalrm, NULL);
701 sigaction(SIGCHLD, &sachld, NULL);
702 sigaction(SIGHUP, &sahup, NULL);
703 /* SIGPIPE reset before exec */
706 * Call tcpmux to find the real service to exec.
709 sep->se_bi->bi_fn == (bi_fn_t *) tcpmux) {
717 inetd_setproctitle("wrapping", ctrl);
718 service = sep->se_server_name ?
719 sep->se_server_name : sep->se_service;
720 request_init(&req, RQ_DAEMON, service, RQ_FILE, ctrl, NULL);
722 deny_severity = LIBWRAP_DENY_FACILITY|LIBWRAP_DENY_SEVERITY;
723 allow_severity = LIBWRAP_ALLOW_FACILITY|LIBWRAP_ALLOW_SEVERITY;
724 denied = !hosts_access(&req);
726 syslog(deny_severity,
727 "refused connection from %.500s, service %s (%s%s)",
728 eval_client(&req), service, sep->se_proto,
729 (whichaf(&req) == AF_INET6) ? "6" : "");
730 if (sep->se_socktype != SOCK_STREAM)
731 recv(ctrl, buf, sizeof (buf), 0);
738 syslog(allow_severity,
739 "connection from %.500s, service %s (%s%s)",
740 eval_client(&req), service, sep->se_proto,
741 (whichaf(&req) == AF_INET6) ? "6" : "");
745 (*sep->se_bi->bi_fn)(ctrl, sep);
749 getpid(), sep->se_server);
750 /* Clear close-on-exec. */
751 if (fcntl(ctrl, F_SETFD, 0) < 0) {
753 "%s/%s: fcntl (F_SETFD, 0): %m",
754 sep->se_service, sep->se_proto);
763 if ((pwd = getpwnam(sep->se_user)) == NULL) {
765 "%s/%s: %s: no such user",
766 sep->se_service, sep->se_proto,
768 if (sep->se_socktype != SOCK_STREAM)
769 recv(0, buf, sizeof (buf), 0);
773 if ( sep->se_group != NULL
774 && (grp = getgrnam(sep->se_group)) == NULL
777 "%s/%s: %s: no such group",
778 sep->se_service, sep->se_proto,
780 if (sep->se_socktype != SOCK_STREAM)
781 recv(0, buf, sizeof (buf), 0);
785 pwd->pw_gid = grp->gr_gid;
787 if ((lc = login_getclass(sep->se_class)) == NULL) {
788 /* error syslogged by getclass */
790 "%s/%s: %s: login class error",
791 sep->se_service, sep->se_proto,
793 if (sep->se_socktype != SOCK_STREAM)
794 recv(0, buf, sizeof (buf), 0);
800 "%s: can't setsid(): %m",
802 /* _exit(EX_OSERR); not fatal yet */
805 if (setusercontext(lc, pwd, pwd->pw_uid,
806 LOGIN_SETALL) != 0) {
808 "%s: can't setusercontext(..%s..): %m",
809 sep->se_service, sep->se_user);
815 if (setlogin(sep->se_user) < 0) {
817 "%s: can't setlogin(%s): %m",
818 sep->se_service, sep->se_user);
819 /* _exit(EX_OSERR); not yet */
821 if (setgid(pwd->pw_gid) < 0) {
823 "%s: can't set gid %d: %m",
824 sep->se_service, pwd->pw_gid);
827 initgroups(pwd->pw_name,
829 if (setuid(pwd->pw_uid) < 0) {
831 "%s: can't set uid %d: %m",
832 sep->se_service, pwd->pw_uid);
837 sigaction(SIGPIPE, &sapipe, NULL);
838 execv(sep->se_server, sep->se_argv);
840 "cannot execute %s: %m", sep->se_server);
841 if (sep->se_socktype != SOCK_STREAM)
842 recv(0, buf, sizeof (buf), 0);
847 if (sep->se_accept && sep->se_socktype == SOCK_STREAM)
854 * Add a signal flag to the signal flag queue for later handling
862 if (write(signalpipe[1], &ch, 1) != 1) {
863 syslog(LOG_ERR, "write: %m");
869 * Record a new child pid for this service. If we've reached the
870 * limit on children, then stop accepting incoming requests.
874 addchild(struct servtab *sep, pid_t pid)
876 if (sep->se_maxchild <= 0)
879 if (sep->se_numchild >= sep->se_maxchild) {
880 syslog(LOG_ERR, "%s: %d >= %d",
881 __func__, sep->se_numchild, sep->se_maxchild);
885 sep->se_pids[sep->se_numchild++] = pid;
886 if (sep->se_numchild == sep->se_maxchild)
891 * Some child process has exited. See if it's on somebody's list.
895 flag_reapchild(int signo __unused)
908 pid = wait3(&status, WNOHANG, NULL);
912 warnx("%d reaped, %s %u", pid,
913 WIFEXITED(status) ? "status" : "signal",
914 WIFEXITED(status) ? WEXITSTATUS(status)
916 for (sep = servtab; sep; sep = sep->se_next) {
917 for (k = 0; k < sep->se_numchild; k++)
918 if (sep->se_pids[k] == pid)
920 if (k == sep->se_numchild)
922 if (sep->se_numchild == sep->se_maxchild)
924 sep->se_pids[k] = sep->se_pids[--sep->se_numchild];
925 if (WIFSIGNALED(status) || WEXITSTATUS(status))
927 "%s[%d]: exited, %s %u",
929 WIFEXITED(status) ? "status" : "signal",
930 WIFEXITED(status) ? WEXITSTATUS(status)
939 flag_config(int signo __unused)
947 struct servtab *sep, *new, **sepp;
950 login_cap_t *lc = NULL;
955 syslog(LOG_ERR, "%s: %m", CONFIG);
958 for (sep = servtab; sep; sep = sep->se_next)
960 while ((new = getconfigent())) {
961 if (getpwnam(new->se_user) == NULL) {
963 "%s/%s: no such user '%s', service ignored",
964 new->se_service, new->se_proto, new->se_user);
967 if (new->se_group && getgrnam(new->se_group) == NULL) {
969 "%s/%s: no such group '%s', service ignored",
970 new->se_service, new->se_proto, new->se_group);
974 if ((lc = login_getclass(new->se_class)) == NULL) {
975 /* error syslogged by getclass */
977 "%s/%s: %s: login class error, service ignored",
978 new->se_service, new->se_proto, new->se_class);
983 for (sep = servtab; sep; sep = sep->se_next)
984 if (strcmp(sep->se_service, new->se_service) == 0 &&
985 strcmp(sep->se_proto, new->se_proto) == 0 &&
986 sep->se_socktype == new->se_socktype &&
987 sep->se_family == new->se_family)
992 #define SWAP(a, b) { typeof(a) c = a; a = b; b = c; }
993 omask = sigblock(SIGBLOCK);
994 if (sep->se_nomapped != new->se_nomapped) {
995 sep->se_nomapped = new->se_nomapped;
998 /* copy over outstanding child pids */
999 if (sep->se_maxchild > 0 && new->se_maxchild > 0) {
1000 new->se_numchild = sep->se_numchild;
1001 if (new->se_numchild > new->se_maxchild)
1002 new->se_numchild = new->se_maxchild;
1003 memcpy(new->se_pids, sep->se_pids,
1004 new->se_numchild * sizeof(*new->se_pids));
1006 SWAP(sep->se_pids, new->se_pids);
1007 sep->se_maxchild = new->se_maxchild;
1008 sep->se_numchild = new->se_numchild;
1009 sep->se_maxcpm = new->se_maxcpm;
1010 resize_conn(sep, new->se_maxperip);
1011 sep->se_maxperip = new->se_maxperip;
1012 sep->se_bi = new->se_bi;
1013 /* might need to turn on or off service now */
1014 if (sep->se_fd >= 0) {
1015 if (sep->se_maxchild > 0
1016 && sep->se_numchild == sep->se_maxchild) {
1017 if (FD_ISSET(sep->se_fd, &allsock))
1020 if (!FD_ISSET(sep->se_fd, &allsock))
1024 sep->se_accept = new->se_accept;
1025 SWAP(sep->se_user, new->se_user);
1026 SWAP(sep->se_group, new->se_group);
1028 SWAP(sep->se_class, new->se_class);
1030 SWAP(sep->se_server, new->se_server);
1031 SWAP(sep->se_server_name, new->se_server_name);
1032 for (i = 0; i < MAXARGV; i++)
1033 SWAP(sep->se_argv[i], new->se_argv[i]);
1035 SWAP(sep->se_policy, new->se_policy);
1041 print_service("REDO", sep);
1045 print_service("ADD ", sep);
1047 sep->se_checked = 1;
1052 switch (sep->se_family) {
1054 if (no_v4bind != 0) {
1061 if (no_v6bind != 0) {
1069 if (sep->se_family != AF_UNIX) {
1070 sp = getservbyname(sep->se_service, sep->se_proto);
1072 syslog(LOG_ERR, "%s/%s: unknown service",
1073 sep->se_service, sep->se_proto);
1074 sep->se_checked = 0;
1078 switch (sep->se_family) {
1080 if (sp->s_port != sep->se_ctrladdr4.sin_port) {
1081 sep->se_ctrladdr4.sin_port =
1089 sep->se_ctrladdr6.sin6_port) {
1090 sep->se_ctrladdr6.sin6_port =
1097 if (sep->se_reset != 0 && sep->se_fd >= 0)
1100 rpc = getrpcbyname(sep->se_service);
1102 syslog(LOG_ERR, "%s/%s unknown RPC service",
1103 sep->se_service, sep->se_proto);
1104 if (sep->se_fd != -1)
1109 if (rpc->r_number != sep->se_rpc_prog) {
1110 if (sep->se_rpc_prog)
1112 sep->se_rpc_prog = rpc->r_number;
1113 if (sep->se_fd != -1)
1118 if (sep->se_fd == -1)
1123 * Purge anything not looked at above.
1125 omask = sigblock(SIGBLOCK);
1127 while ((sep = *sepp)) {
1128 if (sep->se_checked) {
1129 sepp = &sep->se_next;
1132 *sepp = sep->se_next;
1133 if (sep->se_fd >= 0)
1136 print_service("FREE", sep);
1137 if (sep->se_rpc && sep->se_rpc_prog > 0)
1146 unregisterrpc(struct servtab *sep)
1149 struct servtab *sepp;
1152 omask = sigblock(SIGBLOCK);
1153 for (sepp = servtab; sepp; sepp = sepp->se_next) {
1156 if (sep->se_checked == 0 ||
1158 sep->se_rpc_prog != sepp->se_rpc_prog)
1163 print_service("UNREG", sep);
1164 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++)
1165 pmap_unset(sep->se_rpc_prog, i);
1166 if (sep->se_fd != -1)
1173 flag_retry(int signo __unused)
1181 struct servtab *sep;
1184 for (sep = servtab; sep; sep = sep->se_next)
1185 if (sep->se_fd == -1 && !ISMUX(sep))
1190 setup(struct servtab *sep)
1194 if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) {
1196 warn("socket failed on %s/%s",
1197 sep->se_service, sep->se_proto);
1198 syslog(LOG_ERR, "%s/%s: socket: %m",
1199 sep->se_service, sep->se_proto);
1202 /* Set all listening sockets to close-on-exec. */
1203 if (fcntl(sep->se_fd, F_SETFD, FD_CLOEXEC) < 0) {
1204 syslog(LOG_ERR, "%s/%s: fcntl (F_SETFD, FD_CLOEXEC): %m",
1205 sep->se_service, sep->se_proto);
1209 #define turnon(fd, opt) \
1210 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
1211 if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) &&
1212 turnon(sep->se_fd, SO_DEBUG) < 0)
1213 syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m");
1214 if (turnon(sep->se_fd, SO_REUSEADDR) < 0)
1215 syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
1217 if (turnon(sep->se_fd, SO_PRIVSTATE) < 0)
1218 syslog(LOG_ERR, "setsockopt (SO_PRIVSTATE): %m");
1220 /* tftpd opens a new connection then needs more infos */
1221 if ((sep->se_family == AF_INET6) &&
1222 (strcmp(sep->se_proto, "udp") == 0) &&
1223 (sep->se_accept == 0) &&
1224 (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_PKTINFO,
1225 (char *)&on, sizeof (on)) < 0))
1226 syslog(LOG_ERR, "setsockopt (IPV6_RECVPKTINFO): %m");
1227 if (sep->se_family == AF_INET6) {
1228 int flag = sep->se_nomapped ? 1 : 0;
1229 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_V6ONLY,
1230 (char *)&flag, sizeof (flag)) < 0)
1231 syslog(LOG_ERR, "setsockopt (IPV6_V6ONLY): %m");
1234 if (sep->se_type == TTCP_TYPE)
1235 if (setsockopt(sep->se_fd, IPPROTO_TCP, TCP_NOPUSH,
1236 (char *)&on, sizeof (on)) < 0)
1237 syslog(LOG_ERR, "setsockopt (TCP_NOPUSH): %m");
1239 if (sep->se_type == FAITH_TYPE) {
1240 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_FAITH, &on,
1242 syslog(LOG_ERR, "setsockopt (IPV6_FAITH): %m");
1249 if (sep->se_family == AF_UNIX) {
1250 unlink(sep->se_ctrladdr_un.sun_path);
1251 umask(0777); /* Make socket with conservative permissions */
1253 if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr,
1254 sep->se_ctrladdr_size) < 0) {
1256 warn("bind failed on %s/%s",
1257 sep->se_service, sep->se_proto);
1258 syslog(LOG_ERR, "%s/%s: bind: %m",
1259 sep->se_service, sep->se_proto);
1266 if (sep->se_family == AF_UNIX)
1270 if (sep->se_family == AF_UNIX) {
1271 /* Ick - fch{own,mod} don't work on Unix domain sockets */
1272 if (chown(sep->se_service, sep->se_sockuid, sep->se_sockgid) < 0)
1273 syslog(LOG_ERR, "chown socket: %m");
1274 if (chmod(sep->se_service, sep->se_sockmode) < 0)
1275 syslog(LOG_ERR, "chmod socket: %m");
1280 socklen_t len = sep->se_ctrladdr_size;
1282 if (sep->se_family != AF_INET) {
1284 "%s/%s: unsupported address family for rpc",
1285 sep->se_service, sep->se_proto);
1290 if (getsockname(sep->se_fd,
1291 (struct sockaddr*)&sep->se_ctrladdr, &len) < 0){
1292 syslog(LOG_ERR, "%s/%s: getsockname: %m",
1293 sep->se_service, sep->se_proto);
1299 print_service("REG ", sep);
1300 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) {
1301 pmap_unset(sep->se_rpc_prog, i);
1302 pmap_set(sep->se_rpc_prog, i,
1303 (sep->se_socktype == SOCK_DGRAM)
1304 ? IPPROTO_UDP : IPPROTO_TCP,
1305 ntohs(sep->se_ctrladdr4.sin_port));
1308 if (sep->se_socktype == SOCK_STREAM)
1309 listen(sep->se_fd, 64);
1312 warnx("registered %s on %d",
1313 sep->se_server, sep->se_fd);
1319 ipsecsetup(struct servtab *sep)
1322 char *policy_in = NULL;
1323 char *policy_out = NULL;
1327 switch (sep->se_family) {
1330 opt = IP_IPSEC_POLICY;
1334 level = IPPROTO_IPV6;
1335 opt = IPV6_IPSEC_POLICY;
1342 if (!sep->se_policy || sep->se_policy[0] == '\0') {
1343 static char def_in[] = "in entrust", def_out[] = "out entrust";
1345 policy_out = def_out;
1347 if (!strncmp("in", sep->se_policy, 2))
1348 policy_in = sep->se_policy;
1349 else if (!strncmp("out", sep->se_policy, 3))
1350 policy_out = sep->se_policy;
1352 syslog(LOG_ERR, "invalid security policy \"%s\"",
1358 if (policy_in != NULL) {
1359 buf = ipsec_set_policy(policy_in, strlen(policy_in));
1361 if (setsockopt(sep->se_fd, level, opt,
1362 buf, ipsec_get_policylen(buf)) < 0 &&
1364 warnx("%s/%s: ipsec initialization failed; %s",
1365 sep->se_service, sep->se_proto,
1369 syslog(LOG_ERR, "invalid security policy \"%s\"",
1372 if (policy_out != NULL) {
1373 buf = ipsec_set_policy(policy_out, strlen(policy_out));
1375 if (setsockopt(sep->se_fd, level, opt,
1376 buf, ipsec_get_policylen(buf)) < 0 &&
1378 warnx("%s/%s: ipsec initialization failed; %s",
1379 sep->se_service, sep->se_proto,
1383 syslog(LOG_ERR, "invalid security policy \"%s\"",
1390 * Finish with a service and its socket.
1393 close_sep(struct servtab *sep)
1395 if (sep->se_fd >= 0) {
1396 if (FD_ISSET(sep->se_fd, &allsock))
1402 sep->se_numchild = 0; /* forget about any existing children */
1406 matchservent(const char *name1, const char *name2, const char *proto)
1411 if (strcmp(proto, "unix") == 0) {
1412 if ((p = strrchr(name1, '/')) != NULL)
1414 if ((p = strrchr(name2, '/')) != NULL)
1417 if (strcmp(name1, name2) == 0)
1419 if ((se = getservbyname(name1, proto)) != NULL) {
1420 if (strcmp(name2, se->s_name) == 0)
1422 for (alias = se->s_aliases; *alias; alias++)
1423 if (strcmp(name2, *alias) == 0)
1430 enter(struct servtab *cp)
1432 struct servtab *sep;
1435 sep = (struct servtab *)malloc(sizeof (*sep));
1437 syslog(LOG_ERR, "malloc: %m");
1442 omask = sigblock(SIGBLOCK);
1443 sep->se_next = servtab;
1450 enable(struct servtab *sep)
1454 "enabling %s, fd %d", sep->se_service, sep->se_fd);
1456 if (sep->se_fd < 0) {
1458 "%s: %s: bad fd", __func__, sep->se_service);
1463 "%s: %s: is mux", __func__, sep->se_service);
1466 if (FD_ISSET(sep->se_fd, &allsock)) {
1468 "%s: %s: not off", __func__, sep->se_service);
1473 FD_SET(sep->se_fd, &allsock);
1474 if (sep->se_fd > maxsock)
1475 maxsock = sep->se_fd;
1479 disable(struct servtab *sep)
1483 "disabling %s, fd %d", sep->se_service, sep->se_fd);
1485 if (sep->se_fd < 0) {
1487 "%s: %s: bad fd", __func__, sep->se_service);
1492 "%s: %s: is mux", __func__, sep->se_service);
1495 if (!FD_ISSET(sep->se_fd, &allsock)) {
1497 "%s: %s: not on", __func__, sep->se_service);
1501 syslog(LOG_ERR, "%s: nsock=0", __func__);
1506 FD_CLR(sep->se_fd, &allsock);
1507 if (sep->se_fd == maxsock)
1511 FILE *fconfig = NULL;
1512 struct servtab serv;
1513 char line[LINE_MAX];
1519 if (fconfig != NULL) {
1520 fseek(fconfig, 0L, SEEK_SET);
1523 fconfig = fopen(CONFIG, "r");
1524 return (fconfig != NULL);
1539 struct servtab *sep = &serv;
1543 static char TCPMUX_TOKEN[] = "tcpmux/";
1544 #define MUX_LEN (sizeof(TCPMUX_TOKEN)-1)
1546 char *policy = NULL;
1555 while ((cp = nextline(fconfig)) != NULL) {
1557 /* lines starting with #@ is not a comment, but the policy */
1558 if (cp[0] == '#' && cp[1] == '@') {
1560 for (p = cp + 2; p && *p && isspace(*p); p++)
1566 } else if (ipsec_get_policylen(p) >= 0) {
1572 "%s: invalid ipsec policy \"%s\"",
1578 if (*cp == '#' || *cp == '\0')
1585 * clear the static buffer, since some fields (se_ctrladdr,
1586 * for example) don't get initialized here.
1588 memset(sep, 0, sizeof *sep);
1591 /* got an empty line containing just blanks/tabs. */
1594 if (arg[0] == ':') { /* :user:group:perm: */
1595 char *user, *group, *perm;
1599 if ((group = strchr(user, ':')) == NULL) {
1600 syslog(LOG_ERR, "no group after user '%s'", user);
1604 if ((perm = strchr(group, ':')) == NULL) {
1605 syslog(LOG_ERR, "no mode after group '%s'", group);
1609 if ((pw = getpwnam(user)) == NULL) {
1610 syslog(LOG_ERR, "no such user '%s'", user);
1613 sep->se_sockuid = pw->pw_uid;
1614 if ((gr = getgrnam(group)) == NULL) {
1615 syslog(LOG_ERR, "no such user '%s'", group);
1618 sep->se_sockgid = gr->gr_gid;
1619 sep->se_sockmode = strtol(perm, &arg, 8);
1621 syslog(LOG_ERR, "bad mode '%s'", perm);
1626 sep->se_sockuid = euid;
1627 sep->se_sockgid = egid;
1628 sep->se_sockmode = 0200;
1630 if (strncmp(arg, TCPMUX_TOKEN, MUX_LEN) == 0) {
1631 char *c = arg + MUX_LEN;
1633 sep->se_type = MUXPLUS_TYPE;
1636 sep->se_type = MUX_TYPE;
1637 sep->se_service = newstr(c);
1639 sep->se_service = newstr(arg);
1640 sep->se_type = NORM_TYPE;
1643 if (strcmp(arg, "stream") == 0)
1644 sep->se_socktype = SOCK_STREAM;
1645 else if (strcmp(arg, "dgram") == 0)
1646 sep->se_socktype = SOCK_DGRAM;
1647 else if (strcmp(arg, "rdm") == 0)
1648 sep->se_socktype = SOCK_RDM;
1649 else if (strcmp(arg, "seqpacket") == 0)
1650 sep->se_socktype = SOCK_SEQPACKET;
1651 else if (strcmp(arg, "raw") == 0)
1652 sep->se_socktype = SOCK_RAW;
1654 sep->se_socktype = -1;
1657 if (strncmp(arg, "tcp", 3) == 0) {
1658 sep->se_proto = newstr(strsep(&arg, "/"));
1660 if (strcmp(arg, "ttcp") == 0)
1661 sep->se_type = TTCP_TYPE;
1662 else if (strcmp(arg, "faith") == 0)
1663 sep->se_type = FAITH_TYPE;
1666 if (sep->se_type == NORM_TYPE &&
1667 strncmp(arg, "faith/", 6) == 0) {
1669 sep->se_type = FAITH_TYPE;
1671 sep->se_proto = newstr(arg);
1673 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
1674 if (no_v4bind != 0) {
1675 syslog(LOG_NOTICE, "IPv4 bind is ignored for %s",
1680 memmove(sep->se_proto, sep->se_proto + 4,
1681 strlen(sep->se_proto) + 1 - 4);
1683 sep->se_rpc_prog = sep->se_rpc_lowvers =
1684 sep->se_rpc_lowvers = 0;
1685 memcpy(&sep->se_ctrladdr4, bind_sa4,
1686 sizeof(sep->se_ctrladdr4));
1687 if ((versp = strrchr(sep->se_service, '/'))) {
1689 switch (sscanf(versp, "%u-%u",
1690 &sep->se_rpc_lowvers,
1691 &sep->se_rpc_highvers)) {
1695 sep->se_rpc_highvers =
1696 sep->se_rpc_lowvers;
1700 "bad RPC version specifier; %s",
1707 sep->se_rpc_lowvers =
1708 sep->se_rpc_highvers = 1;
1711 sep->se_nomapped = 0;
1712 while (isdigit(sep->se_proto[strlen(sep->se_proto) - 1])) {
1714 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') {
1715 if (no_v6bind != 0) {
1716 syslog(LOG_NOTICE, "IPv6 bind is ignored for %s",
1721 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1726 if (sep->se_proto[strlen(sep->se_proto) - 1] == '4') {
1727 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1731 /* illegal version num */
1732 syslog(LOG_ERR, "bad IP version for %s", sep->se_proto);
1736 if (strcmp(sep->se_proto, "unix") == 0) {
1737 sep->se_family = AF_UNIX;
1741 sep->se_family = AF_INET6;
1742 if (v4bind == 0 || no_v4bind != 0)
1743 sep->se_nomapped = 1;
1746 { /* default to v4 bind if not v6 bind */
1747 if (no_v4bind != 0) {
1748 syslog(LOG_NOTICE, "IPv4 bind is ignored for %s",
1753 sep->se_family = AF_INET;
1756 switch(sep->se_family) {
1758 memcpy(&sep->se_ctrladdr4, bind_sa4,
1759 sizeof(sep->se_ctrladdr4));
1760 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr4);
1764 memcpy(&sep->se_ctrladdr6, bind_sa6,
1765 sizeof(sep->se_ctrladdr6));
1766 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr6);
1770 if (strlen(sep->se_service) >= sizeof(sep->se_ctrladdr_un.sun_path)) {
1772 "domain socket pathname too long for service %s",
1776 memset(&sep->se_ctrladdr, 0, sizeof(sep->se_ctrladdr));
1777 sep->se_ctrladdr_un.sun_family = sep->se_family;
1778 sep->se_ctrladdr_un.sun_len = strlen(sep->se_service);
1779 strcpy(sep->se_ctrladdr_un.sun_path, sep->se_service);
1780 sep->se_ctrladdr_size = SUN_LEN(&sep->se_ctrladdr_un);
1783 if (!strncmp(arg, "wait", 4))
1785 else if (!strncmp(arg, "nowait", 6))
1789 "%s: bad wait/nowait for service %s",
1790 CONFIG, sep->se_service);
1793 sep->se_maxchild = -1;
1794 sep->se_maxcpm = -1;
1795 sep->se_maxperip = -1;
1796 if ((s = strchr(arg, '/')) != NULL) {
1800 val = strtoul(s + 1, &eptr, 10);
1801 if (eptr == s + 1 || val > MAX_MAXCHLD) {
1803 "%s: bad max-child for service %s",
1804 CONFIG, sep->se_service);
1808 if (!sep->se_accept && val != 1)
1809 warnx("maxchild=%lu for wait service %s"
1810 " not recommended", val, sep->se_service);
1811 sep->se_maxchild = val;
1813 sep->se_maxcpm = strtol(eptr + 1, &eptr, 10);
1815 sep->se_maxperip = strtol(eptr + 1, &eptr, 10);
1817 * explicitly do not check for \0 for future expansion /
1818 * backwards compatibility
1823 * Silently enforce "nowait" mode for TCPMUX services
1824 * since they don't have an assigned port to listen on.
1827 if (strcmp(sep->se_proto, "tcp")) {
1829 "%s: bad protocol for tcpmux service %s",
1830 CONFIG, sep->se_service);
1833 if (sep->se_socktype != SOCK_STREAM) {
1835 "%s: bad socket type for tcpmux service %s",
1836 CONFIG, sep->se_service);
1840 sep->se_user = newstr(sskip(&cp));
1842 if ((s = strrchr(sep->se_user, '/')) != NULL) {
1844 sep->se_class = newstr(s + 1);
1846 sep->se_class = newstr(RESOURCE_RC);
1848 if ((s = strrchr(sep->se_user, ':')) != NULL) {
1850 sep->se_group = newstr(s + 1);
1852 sep->se_group = NULL;
1853 sep->se_server = newstr(sskip(&cp));
1854 if ((sep->se_server_name = strrchr(sep->se_server, '/')))
1855 sep->se_server_name++;
1856 if (strcmp(sep->se_server, "internal") == 0) {
1859 for (bi = biltins; bi->bi_service; bi++)
1860 if (bi->bi_socktype == sep->se_socktype &&
1861 matchservent(bi->bi_service, sep->se_service,
1864 if (bi->bi_service == 0) {
1865 syslog(LOG_ERR, "internal service %s unknown",
1869 sep->se_accept = 1; /* force accept mode for built-ins */
1873 if (sep->se_maxperip < 0)
1874 sep->se_maxperip = maxperip;
1875 if (sep->se_maxcpm < 0)
1876 sep->se_maxcpm = maxcpm;
1877 if (sep->se_maxchild < 0) { /* apply default max-children */
1878 if (sep->se_bi && sep->se_bi->bi_maxchild >= 0)
1879 sep->se_maxchild = sep->se_bi->bi_maxchild;
1880 else if (sep->se_accept)
1881 sep->se_maxchild = maxchild > 0 ? maxchild : 0;
1883 sep->se_maxchild = 1;
1885 if (sep->se_maxchild > 0) {
1886 sep->se_pids = malloc(sep->se_maxchild * sizeof(*sep->se_pids));
1887 if (sep->se_pids == NULL) {
1888 syslog(LOG_ERR, "malloc: %m");
1893 for (arg = skip(&cp); cp; arg = skip(&cp))
1894 if (argc < MAXARGV) {
1895 sep->se_argv[argc++] = newstr(arg);
1898 "%s: too many arguments for service %s",
1899 CONFIG, sep->se_service);
1902 while (argc <= MAXARGV)
1903 sep->se_argv[argc++] = NULL;
1904 for (i = 0; i < PERIPSIZE; ++i)
1905 LIST_INIT(&sep->se_conn[i]);
1907 sep->se_policy = policy ? newstr(policy) : NULL;
1913 freeconfig(struct servtab *cp)
1918 free(cp->se_service);
1930 free(cp->se_server);
1933 for (i = 0; i < MAXARGV; i++)
1935 free(cp->se_argv[i]);
1939 free(cp->se_policy);
1945 * Safe skip - if skip returns null, log a syntax error in the
1946 * configuration file and exit.
1955 syslog(LOG_ERR, "%s: syntax error", CONFIG);
1969 while (*cp == ' ' || *cp == '\t')
1976 if (c == ' ' || c == '\t')
1977 if ((cp = nextline(fconfig)))
1982 if (*cp == '"' || *cp == '\'')
1986 while (*cp && *cp != quote)
1989 while (*cp && *cp != ' ' && *cp != '\t')
2002 if (fgets(line, sizeof (line), fd) == NULL)
2004 cp = strchr(line, '\n');
2011 newstr(const char *cp)
2015 if ((cr = strdup(cp != NULL ? cp : "")))
2017 syslog(LOG_ERR, "strdup: %m");
2022 inetd_setproctitle(const char *a, int s)
2025 struct sockaddr_storage ss;
2026 char buf[80], pbuf[INET6_ADDRSTRLEN];
2029 if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) {
2030 getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf),
2031 NULL, 0, NI_NUMERICHOST|NI_WITHSCOPEID);
2032 sprintf(buf, "%s [%s]", a, pbuf);
2034 sprintf(buf, "%s", a);
2035 setproctitle("%s", buf);
2039 check_loop(const struct sockaddr *sa, const struct servtab *sep)
2041 struct servtab *se2;
2042 char pname[INET6_ADDRSTRLEN];
2044 for (se2 = servtab; se2; se2 = se2->se_next) {
2045 if (!se2->se_bi || se2->se_socktype != SOCK_DGRAM)
2048 switch (se2->se_family) {
2050 if (((const struct sockaddr_in *)sa)->sin_port ==
2051 se2->se_ctrladdr4.sin_port)
2056 if (((const struct sockaddr_in *)sa)->sin_port ==
2057 se2->se_ctrladdr4.sin_port)
2065 getnameinfo(sa, sa->sa_len, pname, sizeof(pname), NULL, 0,
2066 NI_NUMERICHOST|NI_WITHSCOPEID);
2067 syslog(LOG_WARNING, "%s/%s:%s/%s loop request REFUSED from %s",
2068 sep->se_service, sep->se_proto,
2069 se2->se_service, se2->se_proto,
2078 * Dump relevant information to stderr
2081 print_service(const char *action, const struct servtab *sep)
2084 "%s: %s proto=%s accept=%d max=%d user=%s group=%s"
2088 " builtin=%p server=%s"
2093 action, sep->se_service, sep->se_proto,
2094 sep->se_accept, sep->se_maxchild, sep->se_user, sep->se_group,
2098 (void *) sep->se_bi, sep->se_server
2100 , (sep->se_policy ? sep->se_policy : "")
2105 #define CPMHSIZE 256
2106 #define CPMHMASK (CPMHSIZE-1)
2110 typedef struct CTime {
2111 unsigned long ct_Ticks;
2115 typedef struct CHash {
2117 struct in_addr c4_Addr;
2118 struct in6_addr c6_Addr;
2120 #define ch_Addr4 cu_Addr.c4_Addr
2121 #define ch_Addr6 cu_Addr.c6_Addr
2125 CTime ch_Times[CHTSIZE];
2128 CHash CHashAry[CPMHSIZE];
2131 cpmip(const struct servtab *sep, int ctrl)
2133 struct sockaddr_storage rss;
2134 socklen_t rssLen = sizeof(rss);
2138 * If getpeername() fails, just let it through (if logging is
2139 * enabled the condition is caught elsewhere)
2142 if (sep->se_maxcpm > 0 &&
2143 getpeername(ctrl, (struct sockaddr *)&rss, &rssLen) == 0 ) {
2144 time_t t = time(NULL);
2145 int hv = 0xABC3D20F;
2148 CHash *chBest = NULL;
2149 unsigned int ticks = t / CHTGRAN;
2150 struct sockaddr_in *sin4;
2152 struct sockaddr_in6 *sin6;
2155 sin4 = (struct sockaddr_in *)&rss;
2157 sin6 = (struct sockaddr_in6 *)&rss;
2163 switch (rss.ss_family) {
2165 p = (char *)&sin4->sin_addr;
2166 addrlen = sizeof(struct in_addr);
2170 p = (char *)&sin6->sin6_addr;
2171 addrlen = sizeof(struct in6_addr);
2175 /* should not happen */
2179 for (i = 0; i < addrlen; ++i, ++p) {
2180 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2182 hv = (hv ^ (hv >> 16));
2184 for (i = 0; i < 5; ++i) {
2185 CHash *ch = &CHashAry[(hv + i) & CPMHMASK];
2187 if (rss.ss_family == AF_INET &&
2188 ch->ch_Family == AF_INET &&
2189 sin4->sin_addr.s_addr == ch->ch_Addr4.s_addr &&
2190 ch->ch_Service && strcmp(sep->se_service,
2191 ch->ch_Service) == 0) {
2196 if (rss.ss_family == AF_INET6 &&
2197 ch->ch_Family == AF_INET6 &&
2198 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2199 &ch->ch_Addr6) != 0 &&
2200 ch->ch_Service && strcmp(sep->se_service,
2201 ch->ch_Service) == 0) {
2206 if (chBest == NULL || ch->ch_LTime == 0 ||
2207 ch->ch_LTime < chBest->ch_LTime) {
2211 if ((rss.ss_family == AF_INET &&
2212 (chBest->ch_Family != AF_INET ||
2213 sin4->sin_addr.s_addr != chBest->ch_Addr4.s_addr)) ||
2214 chBest->ch_Service == NULL ||
2215 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2216 chBest->ch_Family = sin4->sin_family;
2217 chBest->ch_Addr4 = sin4->sin_addr;
2218 if (chBest->ch_Service)
2219 free(chBest->ch_Service);
2220 chBest->ch_Service = strdup(sep->se_service);
2221 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2224 if ((rss.ss_family == AF_INET6 &&
2225 (chBest->ch_Family != AF_INET6 ||
2226 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2227 &chBest->ch_Addr6) == 0)) ||
2228 chBest->ch_Service == NULL ||
2229 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2230 chBest->ch_Family = sin6->sin6_family;
2231 chBest->ch_Addr6 = sin6->sin6_addr;
2232 if (chBest->ch_Service)
2233 free(chBest->ch_Service);
2234 chBest->ch_Service = strdup(sep->se_service);
2235 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2238 chBest->ch_LTime = t;
2240 CTime *ct = &chBest->ch_Times[ticks % CHTSIZE];
2241 if (ct->ct_Ticks != ticks) {
2242 ct->ct_Ticks = ticks;
2247 for (i = 0; i < CHTSIZE; ++i) {
2248 CTime *ct = &chBest->ch_Times[i];
2249 if (ct->ct_Ticks <= ticks &&
2250 ct->ct_Ticks >= ticks - CHTSIZE) {
2251 cnt += ct->ct_Count;
2254 if (cnt * (CHTSIZE * CHTGRAN) / 60 > sep->se_maxcpm) {
2255 char pname[INET6_ADDRSTRLEN];
2257 getnameinfo((struct sockaddr *)&rss,
2258 ((struct sockaddr *)&rss)->sa_len,
2259 pname, sizeof(pname), NULL, 0,
2260 NI_NUMERICHOST|NI_WITHSCOPEID);
2263 "%s from %s exceeded counts/min (limit %d/min)",
2264 sep->se_service, pname,
2271 static struct conninfo *
2272 search_conn(struct servtab *sep, int ctrl)
2274 struct sockaddr_storage ss;
2275 socklen_t sslen = sizeof(ss);
2276 struct conninfo *conn;
2278 char pname[NI_MAXHOST], pname2[NI_MAXHOST];
2280 if (sep->se_maxperip <= 0)
2284 * If getpeername() fails, just let it through (if logging is
2285 * enabled the condition is caught elsewhere)
2287 if (getpeername(ctrl, (struct sockaddr *)&ss, &sslen) != 0)
2290 switch (ss.ss_family) {
2292 hv = hashval((char *)&((struct sockaddr_in *)&ss)->sin_addr,
2293 sizeof(struct in_addr));
2297 hv = hashval((char *)&((struct sockaddr_in6 *)&ss)->sin6_addr,
2298 sizeof(struct in6_addr));
2303 * Since we only support AF_INET and AF_INET6, just
2304 * let other than AF_INET and AF_INET6 through.
2309 if (getnameinfo((struct sockaddr *)&ss, sslen, pname, sizeof(pname),
2310 NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
2313 LIST_FOREACH(conn, &sep->se_conn[hv], co_link) {
2314 if (getnameinfo((struct sockaddr *)&conn->co_addr,
2315 conn->co_addr.ss_len, pname2, sizeof(pname2), NULL, 0,
2316 NI_NUMERICHOST | NI_WITHSCOPEID) == 0 &&
2317 strcmp(pname, pname2) == 0)
2322 if ((conn = malloc(sizeof(struct conninfo))) == NULL) {
2323 syslog(LOG_ERR, "malloc: %m");
2326 conn->co_proc = malloc(sep->se_maxperip * sizeof(*conn->co_proc));
2327 if (conn->co_proc == NULL) {
2328 syslog(LOG_ERR, "malloc: %m");
2331 memcpy(&conn->co_addr, (struct sockaddr *)&ss, sslen);
2332 conn->co_numchild = 0;
2333 LIST_INSERT_HEAD(&sep->se_conn[hv], conn, co_link);
2337 * Since a child process is not invoked yet, we cannot
2338 * determine a pid of a child. So, co_proc and co_numchild
2339 * should be filled leter.
2346 room_conn(struct servtab *sep, struct conninfo *conn)
2348 char pname[NI_MAXHOST];
2350 if (conn->co_numchild >= sep->se_maxperip) {
2351 getnameinfo((struct sockaddr *)&conn->co_addr,
2352 conn->co_addr.ss_len, pname, sizeof(pname), NULL, 0,
2353 NI_NUMERICHOST | NI_WITHSCOPEID);
2354 syslog(LOG_ERR, "%s from %s exceeded counts (limit %d)",
2355 sep->se_service, pname, sep->se_maxperip);
2362 addchild_conn(struct conninfo *conn, pid_t pid)
2364 struct procinfo *proc;
2369 if ((proc = search_proc(pid, 1)) != NULL) {
2370 if (proc->pr_conn != NULL) {
2372 "addchild_conn: child already on process list");
2375 proc->pr_conn = conn;
2378 conn->co_proc[conn->co_numchild++] = proc;
2382 reapchild_conn(pid_t pid)
2384 struct procinfo *proc;
2385 struct conninfo *conn;
2388 if ((proc = search_proc(pid, 0)) == NULL)
2390 if ((conn = proc->pr_conn) == NULL)
2392 for (i = 0; i < conn->co_numchild; ++i)
2393 if (conn->co_proc[i] == proc) {
2394 conn->co_proc[i] = conn->co_proc[--conn->co_numchild];
2402 resize_conn(struct servtab *sep, int maxpip)
2404 struct conninfo *conn;
2407 if (sep->se_maxperip <= 0)
2413 for (i = 0; i < PERIPSIZE; ++i) {
2414 LIST_FOREACH(conn, &sep->se_conn[i], co_link) {
2415 for (j = maxpip; j < conn->co_numchild; ++j)
2416 free_proc(conn->co_proc[j]);
2417 conn->co_proc = realloc(conn->co_proc,
2418 maxpip * sizeof(*conn->co_proc));
2419 if (conn->co_proc == NULL) {
2420 syslog(LOG_ERR, "realloc: %m");
2423 if (conn->co_numchild > maxpip)
2424 conn->co_numchild = maxpip;
2430 free_connlist(struct servtab *sep)
2432 struct conninfo *conn;
2435 for (i = 0; i < PERIPSIZE; ++i) {
2436 while ((conn = LIST_FIRST(&sep->se_conn[i])) != NULL) {
2437 for (j = 0; j < conn->co_numchild; ++j)
2438 free_proc(conn->co_proc[j]);
2439 conn->co_numchild = 0;
2446 free_conn(struct conninfo *conn)
2450 if (conn->co_numchild <= 0) {
2451 LIST_REMOVE(conn, co_link);
2452 free(conn->co_proc);
2457 static struct procinfo *
2458 search_proc(pid_t pid, int add)
2460 struct procinfo *proc;
2463 hv = hashval((char *)&pid, sizeof(pid));
2464 LIST_FOREACH(proc, &proctable[hv], pr_link) {
2465 if (proc->pr_pid == pid)
2468 if (proc == NULL && add) {
2469 if ((proc = malloc(sizeof(struct procinfo))) == NULL) {
2470 syslog(LOG_ERR, "malloc: %m");
2474 proc->pr_conn = NULL;
2475 LIST_INSERT_HEAD(&proctable[hv], proc, pr_link);
2481 free_proc(struct procinfo *proc)
2485 LIST_REMOVE(proc, pr_link);
2490 hashval(char *p, int len)
2492 int i, hv = 0xABC3D20F;
2494 for (i = 0; i < len; ++i, ++p)
2495 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2496 hv = (hv ^ (hv >> 16)) & (PERIPSIZE - 1);