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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1983, 1991, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)from: inetd.c 8.4 (Berkeley) 4/13/94";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
46 * Inetd - Internet super-server
48 * This program invokes all internet services as needed. Connection-oriented
49 * services are invoked each time a connection is made, by creating a process.
50 * This process is passed the connection as file descriptor 0 and is expected
51 * to do a getpeername to find out the source host and port.
53 * Datagram oriented services are invoked when a datagram
54 * arrives; a process is created and passed a pending message
55 * on file descriptor 0. Datagram servers may either connect
56 * to their peer, freeing up the original socket for inetd
57 * to receive further messages on, or ``take over the socket'',
58 * processing all arriving datagrams and, eventually, timing
59 * out. The first type of server is said to be ``multi-threaded'';
60 * the second type of server ``single-threaded''.
62 * Inetd uses a configuration file which is read at startup
63 * and, possibly, at some later time in response to a hangup signal.
64 * The configuration file is ``free format'' with fields given in the
65 * order shown below. Continuation lines for an entry must begin with
66 * a space or tab. All fields must be present in each entry.
68 * service name must be in /etc/services
69 * or name a tcpmux service
70 * or specify a unix domain socket
71 * socket type stream/dgram/raw/rdm/seqpacket
72 * protocol tcp[4][6], udp[4][6], unix
73 * wait/nowait single-threaded/multi-threaded
74 * user[:group][/login-class] user/group/login-class to run daemon as
75 * server program full path name
76 * server program arguments maximum of MAXARGS (20)
78 * TCP services without official port numbers are handled with the
79 * RFC1078-based tcpmux internal service. Tcpmux listens on port 1 for
80 * requests. When a connection is made from a foreign host, the service
81 * requested is passed to tcpmux, which looks it up in the servtab list
82 * and returns the proper entry for the service. Tcpmux returns a
83 * negative reply if the service doesn't exist, otherwise the invoked
84 * server is expected to return the positive reply if the service type in
85 * inetd.conf file has the prefix "tcpmux/". If the service type has the
86 * prefix "tcpmux/+", tcpmux will return the positive reply for the
87 * process; this is for compatibility with older server code, and also
88 * allows you to invoke programs that use stdin/stdout without putting any
89 * special server code in them. Services that use tcpmux are "nowait"
90 * because they do not have a well-known port and hence cannot listen
94 * service name/version must be in /etc/rpc
95 * socket type stream/dgram/raw/rdm/seqpacket
96 * protocol rpc/tcp[4][6], rpc/udp[4][6]
97 * wait/nowait single-threaded/multi-threaded
98 * user[:group][/login-class] user/group/login-class to run daemon as
99 * server program full path name
100 * server program arguments maximum of MAXARGS
102 * Comment lines are indicated by a `#' in column 1.
105 * Comment lines that start with "#@" denote IPsec policy string, as described
106 * in ipsec_set_policy(3). This will affect all the following items in
107 * inetd.conf(8). To reset the policy, just use "#@" line. By default,
108 * there's no IPsec policy.
111 #include <sys/param.h>
112 #include <sys/ioctl.h>
113 #include <sys/mman.h>
114 #include <sys/wait.h>
115 #include <sys/time.h>
116 #include <sys/resource.h>
117 #include <sys/stat.h>
120 #include <netinet/in.h>
121 #include <netinet/tcp.h>
122 #include <arpa/inet.h>
124 #include <rpc/pmap_clnt.h>
139 #include <sysexits.h>
147 #include "pathnames.h"
150 #include <netipsec/ipsec.h>
151 #ifndef IPSEC_POLICY_IPSEC /* no ipsec support on old ipsec */
156 #ifndef LIBWRAP_ALLOW_FACILITY
157 # define LIBWRAP_ALLOW_FACILITY LOG_AUTH
159 #ifndef LIBWRAP_ALLOW_SEVERITY
160 # define LIBWRAP_ALLOW_SEVERITY LOG_INFO
162 #ifndef LIBWRAP_DENY_FACILITY
163 # define LIBWRAP_DENY_FACILITY LOG_AUTH
165 #ifndef LIBWRAP_DENY_SEVERITY
166 # define LIBWRAP_DENY_SEVERITY LOG_WARNING
169 #define ISWRAP(sep) \
170 ( ((wrap_ex && !(sep)->se_bi) || (wrap_bi && (sep)->se_bi)) \
171 && (sep->se_family == AF_INET || sep->se_family == AF_INET6) \
172 && ( ((sep)->se_accept && (sep)->se_socktype == SOCK_STREAM) \
173 || (sep)->se_socktype == SOCK_DGRAM))
176 #include <login_cap.h>
179 #define RESOURCE_RC "daemon"
184 #define MAXCHILD -1 /* maximum number of this service
189 #define MAXCPM -1 /* rate limit invocations from a
190 single remote address,
195 #define MAXPERIP -1 /* maximum number of this service
196 from a single remote address,
201 #define TOOMANY 256 /* don't start more than TOOMANY */
203 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
204 #define RETRYTIME (60*10) /* retry after bind or server fail */
205 #define MAX_MAXCHLD 32767 /* max allowable max children */
207 #define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))
209 #define satosin(sa) ((struct sockaddr_in *)(void *)sa)
210 #define csatosin(sa) ((const struct sockaddr_in *)(const void *)sa)
212 #define satosin6(sa) ((struct sockaddr_in6 *)(void *)sa)
213 #define csatosin6(sa) ((const struct sockaddr_in6 *)(const void *)sa)
215 static void close_sep(struct servtab *);
216 static void flag_signal(int);
217 static void config(void);
218 static int cpmip(const struct servtab *, int);
219 static void endconfig(void);
220 static struct servtab *enter(struct servtab *);
221 static void freeconfig(struct servtab *);
222 static struct servtab *getconfigent(void);
223 static int matchservent(const char *, const char *, const char *);
224 static char *nextline(FILE *);
225 static void addchild(struct servtab *, int);
226 static void reapchild(void);
227 static void enable(struct servtab *);
228 static void disable(struct servtab *);
229 static void retry(void);
230 static int setconfig(void);
231 static void setup(struct servtab *);
233 static void ipsecsetup(struct servtab *);
235 static void unregisterrpc(register struct servtab *sep);
236 static struct conninfo *search_conn(struct servtab *sep, int ctrl);
237 static int room_conn(struct servtab *sep, struct conninfo *conn);
238 static void addchild_conn(struct conninfo *conn, pid_t pid);
239 static void reapchild_conn(pid_t pid);
240 static void free_conn(struct conninfo *conn);
241 static void resize_conn(struct servtab *sep, int maxperip);
242 static void free_connlist(struct servtab *sep);
243 static void free_proc(struct procinfo *);
244 static struct procinfo *search_proc(pid_t pid, int add);
245 static int hashval(char *p, int len);
246 static char *skip(char **);
247 static char *sskip(char **);
248 static char *newstr(const char *);
249 static void print_service(const char *, const struct servtab *);
255 static int wrap_ex = 0;
256 static int wrap_bi = 0;
258 static int dolog = 0;
259 static int maxsock; /* highest-numbered descriptor */
260 static fd_set allsock;
262 static int timingout;
263 static int toomany = TOOMANY;
264 static int maxchild = MAXCHILD;
265 static int maxcpm = MAXCPM;
266 static int maxperip = MAXPERIP;
267 static struct servent *sp;
268 static struct rpcent *rpc;
269 static char *hostname = NULL;
270 static struct sockaddr_in *bind_sa4;
271 static int v4bind_ok = 0;
273 static struct sockaddr_in6 *bind_sa6;
274 static int v6bind_ok = 0;
276 static int signalpipe[2];
284 struct servtab *servtab;
286 static const char *CONFIG = _PATH_INETDCONF;
287 static const char *pid_file = _PATH_INETDPID;
288 static struct pidfh *pfh = NULL;
290 static struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf;
292 static LIST_HEAD(, procinfo) proctable[PERIPSIZE];
295 getvalue(const char *arg, int *value, const char *whine)
300 tmp = strtol(arg, &p, 0);
302 syslog(LOG_ERR, whine, arg);
303 return 1; /* failure */
306 return 0; /* success */
311 whichaf(struct request_info *req)
315 sa = (struct sockaddr *)req->client->sin;
319 if (sa->sa_family == AF_INET6 &&
320 IN6_IS_ADDR_V4MAPPED(&satosin6(sa)->sin6_addr))
323 return sa->sa_family;
328 main(int argc, char **argv)
333 struct sigaction sa, saalrm, sachld, sahup, sapipe;
338 login_cap_t *lc = NULL;
341 struct request_info req;
343 char *service = NULL;
345 struct sockaddr_storage peer;
347 struct addrinfo hints, *res;
348 const char *servname;
350 struct conninfo *conn;
352 openlog("inetd", LOG_PID | LOG_NOWAIT | LOG_PERROR, LOG_DAEMON);
354 while ((ch = getopt(argc, argv, "dlwWR:a:c:C:p:s:")) != -1)
364 getvalue(optarg, &toomany,
365 "-R %s: bad value for service invocation rate");
368 getvalue(optarg, &maxchild,
369 "-c %s: bad value for maximum children");
372 getvalue(optarg, &maxcpm,
373 "-C %s: bad value for maximum children/minute");
382 getvalue(optarg, &maxperip,
383 "-s %s: bad value for maximum children per source address");
394 "usage: inetd [-dlwW] [-a address] [-R rate]"
395 " [-c maximum] [-C rate]"
396 " [-p pidfile] [conf-file]");
400 * Initialize Bind Addrs.
401 * When hostname is NULL, wild card bind addrs are obtained from
402 * getaddrinfo(). But getaddrinfo() requires at least one of
403 * hostname or servname is non NULL.
404 * So when hostname is NULL, set dummy value to servname.
405 * Since getaddrinfo() doesn't accept numeric servname, and
406 * we doesn't use ai_socktype of struct addrinfo returned
407 * from getaddrinfo(), we set dummy value to ai_socktype.
409 servname = (hostname == NULL) ? "0" /* dummy */ : NULL;
411 bzero(&hints, sizeof(struct addrinfo));
412 hints.ai_flags = AI_PASSIVE;
413 hints.ai_family = AF_UNSPEC;
414 hints.ai_socktype = SOCK_STREAM; /* dummy */
415 error = getaddrinfo(hostname, servname, &hints, &res);
417 syslog(LOG_ERR, "-a %s: %s", hostname, gai_strerror(error));
418 if (error == EAI_SYSTEM)
419 syslog(LOG_ERR, "%s", strerror(errno));
423 if (res->ai_addr == NULL) {
424 syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname);
427 switch (res->ai_addr->sa_family) {
431 bind_sa4 = satosin(res->ai_addr);
432 /* init port num in case servname is dummy */
433 bind_sa4->sin_port = 0;
440 bind_sa6 = satosin6(res->ai_addr);
441 /* init port num in case servname is dummy */
442 bind_sa6->sin6_port = 0;
453 } while ((res = res->ai_next) != NULL);
459 syslog(LOG_ERR, "-a %s: unknown address family", hostname);
465 umask(mask = umask(0777));
472 if (access(CONFIG, R_OK) < 0)
473 syslog(LOG_ERR, "Accessing %s: %m, continuing anyway.", CONFIG);
477 pfh = pidfile_open(pid_file, 0600, &otherpid);
479 if (errno == EEXIST) {
480 syslog(LOG_ERR, "%s already running, pid: %d",
481 getprogname(), otherpid);
484 syslog(LOG_WARNING, "pidfile_open() failed: %m");
487 if (daemon(0, 0) < 0) {
488 syslog(LOG_WARNING, "daemon(0,0) failed: %m");
490 /* From now on we don't want syslog messages going to stderr. */
492 openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON);
494 * In case somebody has started inetd manually, we need to
495 * clear the logname, so that old servers run as root do not
496 * get the user's logname..
498 if (setlogin("") < 0) {
499 syslog(LOG_WARNING, "cannot clear logname: %m");
500 /* no big deal if it fails.. */
502 if (pfh != NULL && pidfile_write(pfh) == -1) {
503 syslog(LOG_WARNING, "pidfile_write(): %m");
507 if (madvise(NULL, 0, MADV_PROTECT) != 0)
508 syslog(LOG_WARNING, "madvise() failed: %s", strerror(errno));
510 for (i = 0; i < PERIPSIZE; ++i)
511 LIST_INIT(&proctable[i]);
514 udpconf = getnetconfigent("udp");
515 tcpconf = getnetconfigent("tcp");
516 if (udpconf == NULL || tcpconf == NULL) {
517 syslog(LOG_ERR, "unknown rpc/udp or rpc/tcp");
523 udp6conf = getnetconfigent("udp6");
524 tcp6conf = getnetconfigent("tcp6");
525 if (udp6conf == NULL || tcp6conf == NULL) {
526 syslog(LOG_ERR, "unknown rpc/udp6 or rpc/tcp6");
532 sa = (struct sigaction){
534 .sa_handler = flag_signal,
536 sigemptyset(&sa.sa_mask);
537 sigaddset(&sa.sa_mask, SIGALRM);
538 sigaddset(&sa.sa_mask, SIGCHLD);
539 sigaddset(&sa.sa_mask, SIGHUP);
540 sigaction(SIGALRM, &sa, &saalrm);
542 sigaction(SIGHUP, &sa, &sahup);
543 sigaction(SIGCHLD, &sa, &sachld);
544 sa.sa_handler = SIG_IGN;
545 sigaction(SIGPIPE, &sa, &sapipe);
548 /* space for daemons to overwrite environment for ps */
549 #define DUMMYSIZE 100
550 char dummy[DUMMYSIZE];
552 (void)memset(dummy, 'x', DUMMYSIZE - 1);
553 dummy[DUMMYSIZE - 1] = '\0';
554 (void)setenv("inetd_dummy", dummy, 1);
557 if (pipe2(signalpipe, O_CLOEXEC) != 0) {
558 syslog(LOG_ERR, "pipe: %m");
561 FD_SET(signalpipe[0], &allsock);
565 if (signalpipe[0] > maxsock)
566 maxsock = signalpipe[0];
567 if (signalpipe[1] > maxsock)
568 maxsock = signalpipe[1];
576 syslog(LOG_ERR, "%s: nsock=0", __func__);
581 if ((n = select(maxsock + 1, &readable, (fd_set *)0,
582 (fd_set *)0, (struct timeval *)0)) <= 0) {
583 if (n < 0 && errno != EINTR) {
584 syslog(LOG_WARNING, "select: %m");
589 /* handle any queued signal flags */
590 if (FD_ISSET(signalpipe[0], &readable)) {
593 if (ioctl(signalpipe[0], FIONREAD, &nsig) != 0) {
594 syslog(LOG_ERR, "ioctl: %m");
597 nsig /= sizeof(signo);
598 while (--nsig >= 0) {
601 len = read(signalpipe[0], &signo, sizeof(signo));
602 if (len != sizeof(signo)) {
603 syslog(LOG_ERR, "read: %m");
607 warnx("handling signal flag %d", signo);
621 for (sep = servtab; n && sep; sep = sep->se_next)
622 if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
625 warnx("someone wants %s", sep->se_service);
626 dofork = !sep->se_bi || sep->se_bi->bi_fork || ISWRAP(sep);
628 if (sep->se_accept && sep->se_socktype == SOCK_STREAM) {
630 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
631 syslog(LOG_ERR, "ioctl (FIONBIO, 1): %m");
632 ctrl = accept(sep->se_fd, (struct sockaddr *)0,
635 warnx("accept, ctrl %d", ctrl);
639 "accept (for %s): %m",
641 if (sep->se_accept &&
642 sep->se_socktype == SOCK_STREAM)
647 if (ioctl(sep->se_fd, FIONBIO, &i) < 0)
648 syslog(LOG_ERR, "ioctl1(FIONBIO, 0): %m");
649 if (ioctl(ctrl, FIONBIO, &i) < 0)
650 syslog(LOG_ERR, "ioctl2(FIONBIO, 0): %m");
651 if (cpmip(sep, ctrl) < 0) {
656 (conn = search_conn(sep, ctrl)) != NULL &&
657 !room_conn(sep, conn)) {
663 if (dolog && !ISWRAP(sep)) {
664 char pname[NI_MAXHOST] = "unknown";
667 if (getpeername(ctrl, (struct sockaddr *)
670 if (recvfrom(ctrl, buf, sizeof(buf),
672 (struct sockaddr *)&peer,
674 getnameinfo((struct sockaddr *)&peer,
676 pname, sizeof(pname),
677 NULL, 0, NI_NUMERICHOST);
680 getnameinfo((struct sockaddr *)&peer,
682 pname, sizeof(pname),
683 NULL, 0, NI_NUMERICHOST);
685 syslog(LOG_INFO,"%s from %s", sep->se_service, pname);
687 (void) sigblock(SIGBLOCK);
690 * Fork for all external services, builtins which need to
691 * fork and anything we're wrapping (as wrapping might
692 * block or use hosts_options(5) twist).
695 if (sep->se_count++ == 0)
696 (void)clock_gettime(CLOCK_MONOTONIC_FAST, &sep->se_time);
697 else if (toomany > 0 && sep->se_count >= toomany) {
700 (void)clock_gettime(CLOCK_MONOTONIC_FAST, &now);
701 if (now.tv_sec - sep->se_time.tv_sec >
707 "%s/%s server failing (looping), service terminated",
708 sep->se_service, sep->se_proto);
709 if (sep->se_accept &&
710 sep->se_socktype == SOCK_STREAM)
725 syslog(LOG_ERR, "fork: %m");
726 if (sep->se_accept &&
727 sep->se_socktype == SOCK_STREAM)
735 addchild_conn(conn, pid);
742 sigaction(SIGALRM, &saalrm, (struct sigaction *)0);
743 sigaction(SIGCHLD, &sachld, (struct sigaction *)0);
744 sigaction(SIGHUP, &sahup, (struct sigaction *)0);
745 /* SIGPIPE reset before exec */
748 * Call tcpmux to find the real service to exec.
751 sep->se_bi->bi_fn == (bi_fn_t *) tcpmux) {
760 inetd_setproctitle("wrapping", ctrl);
761 service = sep->se_server_name ?
762 sep->se_server_name : sep->se_service;
763 request_init(&req, RQ_DAEMON, service, RQ_FILE, ctrl, 0);
765 deny_severity = LIBWRAP_DENY_FACILITY|LIBWRAP_DENY_SEVERITY;
766 allow_severity = LIBWRAP_ALLOW_FACILITY|LIBWRAP_ALLOW_SEVERITY;
767 denied = !hosts_access(&req);
769 syslog(deny_severity,
770 "refused connection from %.500s, service %s (%s%s)",
771 eval_client(&req), service, sep->se_proto,
772 (whichaf(&req) == AF_INET6) ? "6" : "");
773 if (sep->se_socktype != SOCK_STREAM)
774 recv(ctrl, buf, sizeof (buf), 0);
781 syslog(allow_severity,
782 "connection from %.500s, service %s (%s%s)",
783 eval_client(&req), service, sep->se_proto,
784 (whichaf(&req) == AF_INET6) ? "6" : "");
789 (*sep->se_bi->bi_fn)(ctrl, sep);
793 getpid(), sep->se_server);
794 /* Clear close-on-exec. */
795 if (fcntl(ctrl, F_SETFD, 0) < 0) {
797 "%s/%s: fcntl (F_SETFD, 0): %m",
798 sep->se_service, sep->se_proto);
807 if ((pwd = getpwnam(sep->se_user)) == NULL) {
809 "%s/%s: %s: no such user",
810 sep->se_service, sep->se_proto,
812 if (sep->se_socktype != SOCK_STREAM)
813 recv(0, buf, sizeof (buf), 0);
817 if ( sep->se_group != NULL
818 && (grp = getgrnam(sep->se_group)) == NULL
821 "%s/%s: %s: no such group",
822 sep->se_service, sep->se_proto,
824 if (sep->se_socktype != SOCK_STREAM)
825 recv(0, buf, sizeof (buf), 0);
829 pwd->pw_gid = grp->gr_gid;
831 if ((lc = login_getclass(sep->se_class)) == NULL) {
832 /* error syslogged by getclass */
834 "%s/%s: %s: login class error",
835 sep->se_service, sep->se_proto,
837 if (sep->se_socktype != SOCK_STREAM)
838 recv(0, buf, sizeof (buf), 0);
844 "%s: can't setsid(): %m",
846 /* _exit(EX_OSERR); not fatal yet */
849 if (setusercontext(lc, pwd, pwd->pw_uid,
850 LOGIN_SETALL & ~LOGIN_SETMAC)
853 "%s: can't setusercontext(..%s..): %m",
854 sep->se_service, sep->se_user);
860 if (setlogin(sep->se_user) < 0) {
862 "%s: can't setlogin(%s): %m",
863 sep->se_service, sep->se_user);
864 /* _exit(EX_OSERR); not yet */
866 if (setgid(pwd->pw_gid) < 0) {
868 "%s: can't set gid %d: %m",
869 sep->se_service, pwd->pw_gid);
872 (void) initgroups(pwd->pw_name,
874 if (setuid(pwd->pw_uid) < 0) {
876 "%s: can't set uid %d: %m",
877 sep->se_service, pwd->pw_uid);
882 sigaction(SIGPIPE, &sapipe,
883 (struct sigaction *)0);
884 execv(sep->se_server, sep->se_argv);
886 "cannot execute %s: %m", sep->se_server);
887 if (sep->se_socktype != SOCK_STREAM)
888 recv(0, buf, sizeof (buf), 0);
893 if (sep->se_accept && sep->se_socktype == SOCK_STREAM)
900 * Add a signal flag to the signal flag queue for later handling
904 flag_signal(int signo)
908 len = write(signalpipe[1], &signo, sizeof(signo));
909 if (len != sizeof(signo)) {
910 syslog(LOG_ERR, "write: %m");
916 * Record a new child pid for this service. If we've reached the
917 * limit on children, then stop accepting incoming requests.
921 addchild(struct servtab *sep, pid_t pid)
923 if (sep->se_maxchild <= 0)
926 if (sep->se_numchild >= sep->se_maxchild) {
927 syslog(LOG_ERR, "%s: %d >= %d",
928 __func__, sep->se_numchild, sep->se_maxchild);
932 sep->se_pids[sep->se_numchild++] = pid;
933 if (sep->se_numchild == sep->se_maxchild)
945 pid = wait3(&status, WNOHANG, (struct rusage *)0);
949 warnx("%d reaped, %s %u", pid,
950 WIFEXITED(status) ? "status" : "signal",
951 WIFEXITED(status) ? WEXITSTATUS(status)
953 for (sep = servtab; sep; sep = sep->se_next) {
954 for (k = 0; k < sep->se_numchild; k++)
955 if (sep->se_pids[k] == pid)
957 if (k == sep->se_numchild)
959 if (sep->se_numchild == sep->se_maxchild)
961 sep->se_pids[k] = sep->se_pids[--sep->se_numchild];
962 if (WIFSIGNALED(status) || WEXITSTATUS(status))
964 "%s[%d]: exited, %s %u",
966 WIFEXITED(status) ? "status" : "signal",
967 WIFEXITED(status) ? WEXITSTATUS(status)
978 struct servtab *sep, *new, **sepp;
982 login_cap_t *lc = NULL;
986 syslog(LOG_ERR, "%s: %m", CONFIG);
989 for (sep = servtab; sep; sep = sep->se_next)
991 while ((new = getconfigent())) {
992 if (getpwnam(new->se_user) == NULL) {
994 "%s/%s: no such user '%s', service ignored",
995 new->se_service, new->se_proto, new->se_user);
998 if (new->se_group && getgrnam(new->se_group) == NULL) {
1000 "%s/%s: no such group '%s', service ignored",
1001 new->se_service, new->se_proto, new->se_group);
1005 if ((lc = login_getclass(new->se_class)) == NULL) {
1006 /* error syslogged by getclass */
1008 "%s/%s: %s: login class error, service ignored",
1009 new->se_service, new->se_proto, new->se_class);
1014 new_nomapped = new->se_nomapped;
1015 for (sep = servtab; sep; sep = sep->se_next)
1016 if (strcmp(sep->se_service, new->se_service) == 0 &&
1017 strcmp(sep->se_proto, new->se_proto) == 0 &&
1018 sep->se_rpc == new->se_rpc &&
1019 sep->se_socktype == new->se_socktype &&
1020 sep->se_family == new->se_family)
1025 #define SWAP(t,a, b) { t c = a; a = b; b = c; }
1026 omask = sigblock(SIGBLOCK);
1027 if (sep->se_nomapped != new->se_nomapped) {
1028 /* for rpc keep old nommaped till unregister */
1030 sep->se_nomapped = new->se_nomapped;
1033 /* copy over outstanding child pids */
1034 if (sep->se_maxchild > 0 && new->se_maxchild > 0) {
1035 new->se_numchild = sep->se_numchild;
1036 if (new->se_numchild > new->se_maxchild)
1037 new->se_numchild = new->se_maxchild;
1038 memcpy(new->se_pids, sep->se_pids,
1039 new->se_numchild * sizeof(*new->se_pids));
1041 SWAP(pid_t *, sep->se_pids, new->se_pids);
1042 sep->se_maxchild = new->se_maxchild;
1043 sep->se_numchild = new->se_numchild;
1044 sep->se_maxcpm = new->se_maxcpm;
1045 resize_conn(sep, new->se_maxperip);
1046 sep->se_maxperip = new->se_maxperip;
1047 sep->se_bi = new->se_bi;
1048 /* might need to turn on or off service now */
1049 if (sep->se_fd >= 0) {
1050 if (sep->se_maxchild > 0
1051 && sep->se_numchild == sep->se_maxchild) {
1052 if (FD_ISSET(sep->se_fd, &allsock))
1055 if (!FD_ISSET(sep->se_fd, &allsock))
1059 sep->se_accept = new->se_accept;
1060 SWAP(char *, sep->se_user, new->se_user);
1061 SWAP(char *, sep->se_group, new->se_group);
1063 SWAP(char *, sep->se_class, new->se_class);
1065 SWAP(char *, sep->se_server, new->se_server);
1066 SWAP(char *, sep->se_server_name, new->se_server_name);
1067 for (i = 0; i < MAXARGV; i++)
1068 SWAP(char *, sep->se_argv[i], new->se_argv[i]);
1070 SWAP(char *, sep->se_policy, new->se_policy);
1076 print_service("REDO", sep);
1080 print_service("ADD ", sep);
1082 sep->se_checked = 1;
1087 switch (sep->se_family) {
1104 if (sep->se_family != AF_UNIX) {
1105 sp = getservbyname(sep->se_service, sep->se_proto);
1107 syslog(LOG_ERR, "%s/%s: unknown service",
1108 sep->se_service, sep->se_proto);
1109 sep->se_checked = 0;
1113 switch (sep->se_family) {
1115 if (sp->s_port != sep->se_ctrladdr4.sin_port) {
1116 sep->se_ctrladdr4.sin_port =
1124 sep->se_ctrladdr6.sin6_port) {
1125 sep->se_ctrladdr6.sin6_port =
1132 if (sep->se_reset != 0 && sep->se_fd >= 0)
1135 rpc = getrpcbyname(sep->se_service);
1137 syslog(LOG_ERR, "%s/%s unknown RPC service",
1138 sep->se_service, sep->se_proto);
1139 if (sep->se_fd != -1)
1140 (void) close(sep->se_fd);
1144 if (sep->se_reset != 0 ||
1145 rpc->r_number != sep->se_rpc_prog) {
1146 if (sep->se_rpc_prog)
1148 sep->se_rpc_prog = rpc->r_number;
1149 if (sep->se_fd != -1)
1150 (void) close(sep->se_fd);
1153 sep->se_nomapped = new_nomapped;
1156 if (sep->se_fd == -1)
1161 * Purge anything not looked at above.
1163 omask = sigblock(SIGBLOCK);
1165 while ((sep = *sepp)) {
1166 if (sep->se_checked) {
1167 sepp = &sep->se_next;
1170 *sepp = sep->se_next;
1171 if (sep->se_fd >= 0)
1174 print_service("FREE", sep);
1175 if (sep->se_rpc && sep->se_rpc_prog > 0)
1180 (void) sigsetmask(omask);
1184 unregisterrpc(struct servtab *sep)
1187 struct servtab *sepp;
1189 struct netconfig *netid4, *netid6;
1191 omask = sigblock(SIGBLOCK);
1192 netid4 = sep->se_socktype == SOCK_DGRAM ? udpconf : tcpconf;
1193 netid6 = sep->se_socktype == SOCK_DGRAM ? udp6conf : tcp6conf;
1194 if (sep->se_family == AF_INET)
1196 else if (sep->se_nomapped)
1199 * Conflict if same prog and protocol - In that case one should look
1200 * to versions, but it is not interesting: having separate servers for
1201 * different versions does not work well.
1202 * Therefore one do not unregister if there is a conflict.
1203 * There is also transport conflict if destroying INET when INET46
1204 * exists, or destroying INET46 when INET exists
1206 for (sepp = servtab; sepp; sepp = sepp->se_next) {
1209 if (sepp->se_checked == 0 ||
1211 strcmp(sep->se_proto, sepp->se_proto) != 0 ||
1212 sep->se_rpc_prog != sepp->se_rpc_prog)
1214 if (sepp->se_family == AF_INET)
1216 if (sepp->se_family == AF_INET6) {
1218 if (!sep->se_nomapped)
1221 if (netid4 == NULL && netid6 == NULL)
1225 print_service("UNREG", sep);
1226 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) {
1228 rpcb_unset(sep->se_rpc_prog, i, netid4);
1230 rpcb_unset(sep->se_rpc_prog, i, netid6);
1232 if (sep->se_fd != -1)
1233 (void) close(sep->se_fd);
1235 (void) sigsetmask(omask);
1241 struct servtab *sep;
1244 for (sep = servtab; sep; sep = sep->se_next)
1245 if (sep->se_fd == -1 && !ISMUX(sep))
1250 setup(struct servtab *sep)
1254 /* Set all listening sockets to close-on-exec. */
1255 if ((sep->se_fd = socket(sep->se_family,
1256 sep->se_socktype | SOCK_CLOEXEC, 0)) < 0) {
1258 warn("socket failed on %s/%s",
1259 sep->se_service, sep->se_proto);
1260 syslog(LOG_ERR, "%s/%s: socket: %m",
1261 sep->se_service, sep->se_proto);
1264 #define turnon(fd, opt) \
1265 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
1266 if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) &&
1267 turnon(sep->se_fd, SO_DEBUG) < 0)
1268 syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m");
1269 if (turnon(sep->se_fd, SO_REUSEADDR) < 0)
1270 syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
1272 if (turnon(sep->se_fd, SO_PRIVSTATE) < 0)
1273 syslog(LOG_ERR, "setsockopt (SO_PRIVSTATE): %m");
1275 /* tftpd opens a new connection then needs more infos */
1277 if ((sep->se_family == AF_INET6) &&
1278 (strcmp(sep->se_proto, "udp") == 0) &&
1279 (sep->se_accept == 0) &&
1280 (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
1281 (char *)&on, sizeof (on)) < 0))
1282 syslog(LOG_ERR, "setsockopt (IPV6_RECVPKTINFO): %m");
1283 if (sep->se_family == AF_INET6) {
1284 int flag = sep->se_nomapped ? 1 : 0;
1285 if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_V6ONLY,
1286 (char *)&flag, sizeof (flag)) < 0)
1287 syslog(LOG_ERR, "setsockopt (IPV6_V6ONLY): %m");
1294 if (sep->se_family == AF_UNIX) {
1295 (void) unlink(sep->se_ctrladdr_un.sun_path);
1296 umask(0777); /* Make socket with conservative permissions */
1298 if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr,
1299 sep->se_ctrladdr_size) < 0) {
1301 warn("bind failed on %s/%s",
1302 sep->se_service, sep->se_proto);
1303 syslog(LOG_ERR, "%s/%s: bind: %m",
1304 sep->se_service, sep->se_proto);
1305 (void) close(sep->se_fd);
1311 if (sep->se_family == AF_UNIX)
1315 if (sep->se_family == AF_UNIX) {
1316 /* Ick - fch{own,mod} don't work on Unix domain sockets */
1317 if (chown(sep->se_service, sep->se_sockuid, sep->se_sockgid) < 0)
1318 syslog(LOG_ERR, "chown socket: %m");
1319 if (chmod(sep->se_service, sep->se_sockmode) < 0)
1320 syslog(LOG_ERR, "chmod socket: %m");
1325 socklen_t len = sep->se_ctrladdr_size;
1326 struct netconfig *netid, *netid2 = NULL;
1328 struct sockaddr_in sock;
1330 struct netbuf nbuf, nbuf2;
1332 if (getsockname(sep->se_fd,
1333 (struct sockaddr*)&sep->se_ctrladdr, &len) < 0){
1334 syslog(LOG_ERR, "%s/%s: getsockname: %m",
1335 sep->se_service, sep->se_proto);
1336 (void) close(sep->se_fd);
1340 nbuf.buf = &sep->se_ctrladdr;
1341 nbuf.len = sep->se_ctrladdr.sa_len;
1342 if (sep->se_family == AF_INET)
1343 netid = sep->se_socktype==SOCK_DGRAM? udpconf:tcpconf;
1346 netid = sep->se_socktype==SOCK_DGRAM? udp6conf:tcp6conf;
1347 if (!sep->se_nomapped) { /* INET and INET6 */
1348 netid2 = netid==udp6conf? udpconf:tcpconf;
1349 memset(&sock, 0, sizeof sock); /* ADDR_ANY */
1351 nbuf2.len = sock.sin_len = sizeof sock;
1352 sock.sin_family = AF_INET;
1353 sock.sin_port = sep->se_ctrladdr6.sin6_port;
1358 print_service("REG ", sep);
1359 for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) {
1360 rpcb_unset(sep->se_rpc_prog, i, netid);
1361 rpcb_set(sep->se_rpc_prog, i, netid, &nbuf);
1363 rpcb_unset(sep->se_rpc_prog, i, netid2);
1364 rpcb_set(sep->se_rpc_prog, i, netid2, &nbuf2);
1368 if (sep->se_socktype == SOCK_STREAM)
1369 listen(sep->se_fd, -1);
1372 warnx("registered %s on %d",
1373 sep->se_server, sep->se_fd);
1379 ipsecsetup(struct servtab *sep)
1382 char *policy_in = NULL;
1383 char *policy_out = NULL;
1387 switch (sep->se_family) {
1390 opt = IP_IPSEC_POLICY;
1394 level = IPPROTO_IPV6;
1395 opt = IPV6_IPSEC_POLICY;
1402 if (!sep->se_policy || sep->se_policy[0] == '\0') {
1403 static char def_in[] = "in entrust", def_out[] = "out entrust";
1405 policy_out = def_out;
1407 if (!strncmp("in", sep->se_policy, 2))
1408 policy_in = sep->se_policy;
1409 else if (!strncmp("out", sep->se_policy, 3))
1410 policy_out = sep->se_policy;
1412 syslog(LOG_ERR, "invalid security policy \"%s\"",
1418 if (policy_in != NULL) {
1419 buf = ipsec_set_policy(policy_in, strlen(policy_in));
1421 if (setsockopt(sep->se_fd, level, opt,
1422 buf, ipsec_get_policylen(buf)) < 0 &&
1424 warnx("%s/%s: ipsec initialization failed; %s",
1425 sep->se_service, sep->se_proto,
1429 syslog(LOG_ERR, "invalid security policy \"%s\"",
1432 if (policy_out != NULL) {
1433 buf = ipsec_set_policy(policy_out, strlen(policy_out));
1435 if (setsockopt(sep->se_fd, level, opt,
1436 buf, ipsec_get_policylen(buf)) < 0 &&
1438 warnx("%s/%s: ipsec initialization failed; %s",
1439 sep->se_service, sep->se_proto,
1443 syslog(LOG_ERR, "invalid security policy \"%s\"",
1450 * Finish with a service and its socket.
1453 close_sep(struct servtab *sep)
1455 if (sep->se_fd >= 0) {
1456 if (FD_ISSET(sep->se_fd, &allsock))
1458 (void) close(sep->se_fd);
1462 sep->se_numchild = 0; /* forget about any existing children */
1466 matchservent(const char *name1, const char *name2, const char *proto)
1471 if (strcmp(proto, "unix") == 0) {
1472 if ((p = strrchr(name1, '/')) != NULL)
1474 if ((p = strrchr(name2, '/')) != NULL)
1477 if (strcmp(name1, name2) == 0)
1479 if ((se = getservbyname(name1, proto)) != NULL) {
1480 if (strcmp(name2, se->s_name) == 0)
1482 for (alias = se->s_aliases; *alias; alias++)
1483 if (strcmp(name2, *alias) == 0)
1489 static struct servtab *
1490 enter(struct servtab *cp)
1492 struct servtab *sep;
1495 sep = (struct servtab *)malloc(sizeof (*sep));
1496 if (sep == (struct servtab *)0) {
1497 syslog(LOG_ERR, "malloc: %m");
1502 omask = sigblock(SIGBLOCK);
1503 sep->se_next = servtab;
1510 enable(struct servtab *sep)
1514 "enabling %s, fd %d", sep->se_service, sep->se_fd);
1516 if (sep->se_fd < 0) {
1518 "%s: %s: bad fd", __func__, sep->se_service);
1523 "%s: %s: is mux", __func__, sep->se_service);
1526 if (FD_ISSET(sep->se_fd, &allsock)) {
1528 "%s: %s: not off", __func__, sep->se_service);
1533 FD_SET(sep->se_fd, &allsock);
1534 if (sep->se_fd > maxsock)
1535 maxsock = sep->se_fd;
1539 disable(struct servtab *sep)
1543 "disabling %s, fd %d", sep->se_service, sep->se_fd);
1545 if (sep->se_fd < 0) {
1547 "%s: %s: bad fd", __func__, sep->se_service);
1552 "%s: %s: is mux", __func__, sep->se_service);
1555 if (!FD_ISSET(sep->se_fd, &allsock)) {
1557 "%s: %s: not on", __func__, sep->se_service);
1561 syslog(LOG_ERR, "%s: nsock=0", __func__);
1566 FD_CLR(sep->se_fd, &allsock);
1567 if (sep->se_fd == maxsock)
1571 static FILE *fconfig = NULL;
1572 static struct servtab serv;
1573 static char line[LINE_MAX];
1579 if (fconfig != NULL) {
1580 fseek(fconfig, 0L, SEEK_SET);
1583 fconfig = fopen(CONFIG, "r");
1584 return (fconfig != NULL);
1591 (void) fclose(fconfig);
1596 static struct servtab *
1599 struct servtab *sep = &serv;
1603 static char TCPMUX_TOKEN[] = "tcpmux/";
1604 #define MUX_LEN (sizeof(TCPMUX_TOKEN)-1)
1622 while ((cp = nextline(fconfig)) != NULL) {
1624 /* lines starting with #@ is not a comment, but the policy */
1625 if (cp[0] == '#' && cp[1] == '@') {
1627 for (p = cp + 2; p && *p && isspace(*p); p++)
1633 } else if (ipsec_get_policylen(p) >= 0) {
1639 "%s: invalid ipsec policy \"%s\"",
1645 if (*cp == '#' || *cp == '\0')
1650 return ((struct servtab *)0);
1652 * clear the static buffer, since some fields (se_ctrladdr,
1653 * for example) don't get initialized here.
1655 memset(sep, 0, sizeof *sep);
1658 /* got an empty line containing just blanks/tabs. */
1661 if (arg[0] == ':') { /* :user:group:perm: */
1662 char *user, *group, *perm;
1666 if ((group = strchr(user, ':')) == NULL) {
1667 syslog(LOG_ERR, "no group after user '%s'", user);
1671 if ((perm = strchr(group, ':')) == NULL) {
1672 syslog(LOG_ERR, "no mode after group '%s'", group);
1676 if ((pw = getpwnam(user)) == NULL) {
1677 syslog(LOG_ERR, "no such user '%s'", user);
1680 sep->se_sockuid = pw->pw_uid;
1681 if ((gr = getgrnam(group)) == NULL) {
1682 syslog(LOG_ERR, "no such user '%s'", group);
1685 sep->se_sockgid = gr->gr_gid;
1686 sep->se_sockmode = strtol(perm, &arg, 8);
1688 syslog(LOG_ERR, "bad mode '%s'", perm);
1693 sep->se_sockuid = euid;
1694 sep->se_sockgid = egid;
1695 sep->se_sockmode = 0200;
1697 if (strncmp(arg, TCPMUX_TOKEN, MUX_LEN) == 0) {
1698 char *c = arg + MUX_LEN;
1700 sep->se_type = MUXPLUS_TYPE;
1703 sep->se_type = MUX_TYPE;
1704 sep->se_service = newstr(c);
1706 sep->se_service = newstr(arg);
1707 sep->se_type = NORM_TYPE;
1710 if (strcmp(arg, "stream") == 0)
1711 sep->se_socktype = SOCK_STREAM;
1712 else if (strcmp(arg, "dgram") == 0)
1713 sep->se_socktype = SOCK_DGRAM;
1714 else if (strcmp(arg, "rdm") == 0)
1715 sep->se_socktype = SOCK_RDM;
1716 else if (strcmp(arg, "seqpacket") == 0)
1717 sep->se_socktype = SOCK_SEQPACKET;
1718 else if (strcmp(arg, "raw") == 0)
1719 sep->se_socktype = SOCK_RAW;
1721 sep->se_socktype = -1;
1724 if (strncmp(arg, "tcp", 3) == 0) {
1725 sep->se_proto = newstr(strsep(&arg, "/"));
1726 if (arg != NULL && (strcmp(arg, "faith") == 0)) {
1727 syslog(LOG_ERR, "faith has been deprecated");
1731 if (sep->se_type == NORM_TYPE &&
1732 strncmp(arg, "faith/", 6) == 0) {
1733 syslog(LOG_ERR, "faith has been deprecated");
1736 sep->se_proto = newstr(arg);
1738 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
1739 memmove(sep->se_proto, sep->se_proto + 4,
1740 strlen(sep->se_proto) + 1 - 4);
1742 sep->se_rpc_prog = sep->se_rpc_lowvers =
1743 sep->se_rpc_highvers = 0;
1744 if ((versp = strrchr(sep->se_service, '/'))) {
1746 switch (sscanf(versp, "%u-%u",
1747 &sep->se_rpc_lowvers,
1748 &sep->se_rpc_highvers)) {
1752 sep->se_rpc_highvers =
1753 sep->se_rpc_lowvers;
1757 "bad RPC version specifier; %s",
1764 sep->se_rpc_lowvers =
1765 sep->se_rpc_highvers = 1;
1768 sep->se_nomapped = 0;
1769 if (strcmp(sep->se_proto, "unix") == 0) {
1770 sep->se_family = AF_UNIX;
1772 while (isdigit(sep->se_proto[strlen(sep->se_proto) - 1])) {
1774 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') {
1775 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1780 if (sep->se_proto[strlen(sep->se_proto) - 1] == '4') {
1781 sep->se_proto[strlen(sep->se_proto) - 1] = '\0';
1785 /* illegal version num */
1786 syslog(LOG_ERR, "bad IP version for %s", sep->se_proto);
1791 if (v6bind && !v6bind_ok) {
1792 syslog(LOG_INFO, "IPv6 bind is ignored for %s",
1794 if (v4bind && v4bind_ok)
1802 sep->se_family = AF_INET6;
1803 if (!v4bind || !v4bind_ok)
1804 sep->se_nomapped = 1;
1807 { /* default to v4 bind if not v6 bind */
1809 syslog(LOG_NOTICE, "IPv4 bind is ignored for %s",
1814 sep->se_family = AF_INET;
1818 switch(sep->se_family) {
1820 memcpy(&sep->se_ctrladdr4, bind_sa4,
1821 sizeof(sep->se_ctrladdr4));
1822 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr4);
1826 memcpy(&sep->se_ctrladdr6, bind_sa6,
1827 sizeof(sep->se_ctrladdr6));
1828 sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr6);
1832 if (strlen(sep->se_service) >= sizeof(sep->se_ctrladdr_un.sun_path)) {
1834 "domain socket pathname too long for service %s",
1838 memset(&sep->se_ctrladdr, 0, sizeof(sep->se_ctrladdr));
1839 sep->se_ctrladdr_un.sun_family = sep->se_family;
1840 sep->se_ctrladdr_un.sun_len = strlen(sep->se_service);
1841 strcpy(sep->se_ctrladdr_un.sun_path, sep->se_service);
1842 sep->se_ctrladdr_size = SUN_LEN(&sep->se_ctrladdr_un);
1845 if (!strncmp(arg, "wait", 4))
1847 else if (!strncmp(arg, "nowait", 6))
1851 "%s: bad wait/nowait for service %s",
1852 CONFIG, sep->se_service);
1855 sep->se_maxchild = -1;
1856 sep->se_maxcpm = -1;
1857 sep->se_maxperip = -1;
1858 if ((s = strchr(arg, '/')) != NULL) {
1862 val = strtoul(s + 1, &eptr, 10);
1863 if (eptr == s + 1 || val > MAX_MAXCHLD) {
1865 "%s: bad max-child for service %s",
1866 CONFIG, sep->se_service);
1870 if (!sep->se_accept && val != 1)
1871 warnx("maxchild=%lu for wait service %s"
1872 " not recommended", val, sep->se_service);
1873 sep->se_maxchild = val;
1875 sep->se_maxcpm = strtol(eptr + 1, &eptr, 10);
1877 sep->se_maxperip = strtol(eptr + 1, &eptr, 10);
1879 * explicitly do not check for \0 for future expansion /
1880 * backwards compatibility
1885 * Silently enforce "nowait" mode for TCPMUX services
1886 * since they don't have an assigned port to listen on.
1889 if (strcmp(sep->se_proto, "tcp")) {
1891 "%s: bad protocol for tcpmux service %s",
1892 CONFIG, sep->se_service);
1895 if (sep->se_socktype != SOCK_STREAM) {
1897 "%s: bad socket type for tcpmux service %s",
1898 CONFIG, sep->se_service);
1902 sep->se_user = newstr(sskip(&cp));
1904 if ((s = strrchr(sep->se_user, '/')) != NULL) {
1906 sep->se_class = newstr(s + 1);
1908 sep->se_class = newstr(RESOURCE_RC);
1910 if ((s = strrchr(sep->se_user, ':')) != NULL) {
1912 sep->se_group = newstr(s + 1);
1914 sep->se_group = NULL;
1915 sep->se_server = newstr(sskip(&cp));
1916 if ((sep->se_server_name = strrchr(sep->se_server, '/')))
1917 sep->se_server_name++;
1918 if (strcmp(sep->se_server, "internal") == 0) {
1921 for (bi = biltins; bi->bi_service; bi++)
1922 if (bi->bi_socktype == sep->se_socktype &&
1923 matchservent(bi->bi_service, sep->se_service,
1926 if (bi->bi_service == 0) {
1927 syslog(LOG_ERR, "internal service %s unknown",
1931 sep->se_accept = 1; /* force accept mode for built-ins */
1935 if (sep->se_maxperip < 0)
1936 sep->se_maxperip = maxperip;
1937 if (sep->se_maxcpm < 0)
1938 sep->se_maxcpm = maxcpm;
1939 if (sep->se_maxchild < 0) { /* apply default max-children */
1940 if (sep->se_bi && sep->se_bi->bi_maxchild >= 0)
1941 sep->se_maxchild = sep->se_bi->bi_maxchild;
1942 else if (sep->se_accept)
1943 sep->se_maxchild = MAX(maxchild, 0);
1945 sep->se_maxchild = 1;
1947 if (sep->se_maxchild > 0) {
1948 sep->se_pids = malloc(sep->se_maxchild * sizeof(*sep->se_pids));
1949 if (sep->se_pids == NULL) {
1950 syslog(LOG_ERR, "malloc: %m");
1955 for (arg = skip(&cp); cp; arg = skip(&cp))
1956 if (argc < MAXARGV) {
1957 sep->se_argv[argc++] = newstr(arg);
1960 "%s: too many arguments for service %s",
1961 CONFIG, sep->se_service);
1964 while (argc <= MAXARGV)
1965 sep->se_argv[argc++] = NULL;
1966 for (i = 0; i < PERIPSIZE; ++i)
1967 LIST_INIT(&sep->se_conn[i]);
1969 sep->se_policy = policy ? newstr(policy) : NULL;
1975 freeconfig(struct servtab *cp)
1980 free(cp->se_service);
1992 free(cp->se_server);
1995 for (i = 0; i < MAXARGV; i++)
1997 free(cp->se_argv[i]);
2001 free(cp->se_policy);
2007 * Safe skip - if skip returns null, log a syntax error in the
2008 * configuration file and exit.
2017 syslog(LOG_ERR, "%s: syntax error", CONFIG);
2031 while (*cp == ' ' || *cp == '\t')
2037 (void) ungetc(c, fconfig);
2038 if (c == ' ' || c == '\t')
2039 if ((cp = nextline(fconfig)))
2044 if (*cp == '"' || *cp == '\'')
2048 while (*cp && *cp != quote)
2051 while (*cp && *cp != ' ' && *cp != '\t')
2064 if (fgets(line, sizeof (line), fd) == NULL)
2066 cp = strchr(line, '\n');
2073 newstr(const char *cp)
2077 if ((cr = strdup(cp != NULL ? cp : "")))
2079 syslog(LOG_ERR, "strdup: %m");
2084 inetd_setproctitle(const char *a, int s)
2087 struct sockaddr_storage ss;
2088 char buf[80], pbuf[NI_MAXHOST];
2091 if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) {
2092 getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf),
2093 NULL, 0, NI_NUMERICHOST);
2094 (void) sprintf(buf, "%s [%s]", a, pbuf);
2096 (void) sprintf(buf, "%s", a);
2097 setproctitle("%s", buf);
2101 check_loop(const struct sockaddr *sa, const struct servtab *sep)
2103 struct servtab *se2;
2104 char pname[NI_MAXHOST];
2106 for (se2 = servtab; se2; se2 = se2->se_next) {
2107 if (!se2->se_bi || se2->se_socktype != SOCK_DGRAM)
2110 switch (se2->se_family) {
2112 if (csatosin(sa)->sin_port ==
2113 se2->se_ctrladdr4.sin_port)
2118 if (csatosin6(sa)->sin6_port ==
2119 se2->se_ctrladdr6.sin6_port)
2127 getnameinfo(sa, sa->sa_len, pname, sizeof(pname), NULL, 0,
2129 syslog(LOG_WARNING, "%s/%s:%s/%s loop request REFUSED from %s",
2130 sep->se_service, sep->se_proto,
2131 se2->se_service, se2->se_proto,
2140 * Dump relevant information to stderr
2143 print_service(const char *action, const struct servtab *sep)
2146 "%s: %s proto=%s accept=%d max=%d user=%s group=%s"
2150 " builtin=%p server=%s"
2155 action, sep->se_service, sep->se_proto,
2156 sep->se_accept, sep->se_maxchild, sep->se_user, sep->se_group,
2160 (void *) sep->se_bi, sep->se_server
2162 , (sep->se_policy ? sep->se_policy : "")
2167 #define CPMHSIZE 256
2168 #define CPMHMASK (CPMHSIZE-1)
2172 typedef struct CTime {
2173 unsigned long ct_Ticks;
2177 typedef struct CHash {
2179 struct in_addr c4_Addr;
2180 struct in6_addr c6_Addr;
2182 #define ch_Addr4 cu_Addr.c4_Addr
2183 #define ch_Addr6 cu_Addr.c6_Addr
2187 CTime ch_Times[CHTSIZE];
2190 static CHash CHashAry[CPMHSIZE];
2193 cpmip(const struct servtab *sep, int ctrl)
2195 struct sockaddr_storage rss;
2196 socklen_t rssLen = sizeof(rss);
2200 * If getpeername() fails, just let it through (if logging is
2201 * enabled the condition is caught elsewhere)
2204 if (sep->se_maxcpm > 0 &&
2205 (sep->se_family == AF_INET || sep->se_family == AF_INET6) &&
2206 getpeername(ctrl, (struct sockaddr *)&rss, &rssLen) == 0 ) {
2207 time_t t = time(NULL);
2208 int hv = 0xABC3D20F;
2211 CHash *chBest = NULL;
2212 unsigned int ticks = t / CHTGRAN;
2213 struct sockaddr_in *sin4;
2215 struct sockaddr_in6 *sin6;
2218 sin4 = (struct sockaddr_in *)&rss;
2220 sin6 = (struct sockaddr_in6 *)&rss;
2226 switch (rss.ss_family) {
2228 p = (char *)&sin4->sin_addr;
2229 addrlen = sizeof(struct in_addr);
2233 p = (char *)&sin6->sin6_addr;
2234 addrlen = sizeof(struct in6_addr);
2238 /* should not happen */
2242 for (i = 0; i < addrlen; ++i, ++p) {
2243 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2245 hv = (hv ^ (hv >> 16));
2247 for (i = 0; i < 5; ++i) {
2248 CHash *ch = &CHashAry[(hv + i) & CPMHMASK];
2250 if (rss.ss_family == AF_INET &&
2251 ch->ch_Family == AF_INET &&
2252 sin4->sin_addr.s_addr == ch->ch_Addr4.s_addr &&
2253 ch->ch_Service && strcmp(sep->se_service,
2254 ch->ch_Service) == 0) {
2259 if (rss.ss_family == AF_INET6 &&
2260 ch->ch_Family == AF_INET6 &&
2261 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2262 &ch->ch_Addr6) != 0 &&
2263 ch->ch_Service && strcmp(sep->se_service,
2264 ch->ch_Service) == 0) {
2269 if (chBest == NULL || ch->ch_LTime == 0 ||
2270 ch->ch_LTime < chBest->ch_LTime) {
2274 if ((rss.ss_family == AF_INET &&
2275 (chBest->ch_Family != AF_INET ||
2276 sin4->sin_addr.s_addr != chBest->ch_Addr4.s_addr)) ||
2277 chBest->ch_Service == NULL ||
2278 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2279 chBest->ch_Family = sin4->sin_family;
2280 chBest->ch_Addr4 = sin4->sin_addr;
2281 if (chBest->ch_Service)
2282 free(chBest->ch_Service);
2283 chBest->ch_Service = strdup(sep->se_service);
2284 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2287 if ((rss.ss_family == AF_INET6 &&
2288 (chBest->ch_Family != AF_INET6 ||
2289 IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2290 &chBest->ch_Addr6) == 0)) ||
2291 chBest->ch_Service == NULL ||
2292 strcmp(sep->se_service, chBest->ch_Service) != 0) {
2293 chBest->ch_Family = sin6->sin6_family;
2294 chBest->ch_Addr6 = sin6->sin6_addr;
2295 if (chBest->ch_Service)
2296 free(chBest->ch_Service);
2297 chBest->ch_Service = strdup(sep->se_service);
2298 bzero(chBest->ch_Times, sizeof(chBest->ch_Times));
2301 chBest->ch_LTime = t;
2303 CTime *ct = &chBest->ch_Times[ticks % CHTSIZE];
2304 if (ct->ct_Ticks != ticks) {
2305 ct->ct_Ticks = ticks;
2310 for (i = 0; i < CHTSIZE; ++i) {
2311 CTime *ct = &chBest->ch_Times[i];
2312 if (ct->ct_Ticks <= ticks &&
2313 ct->ct_Ticks >= ticks - CHTSIZE) {
2314 cnt += ct->ct_Count;
2317 if ((cnt * 60) / (CHTSIZE * CHTGRAN) > sep->se_maxcpm) {
2318 char pname[NI_MAXHOST];
2320 getnameinfo((struct sockaddr *)&rss,
2321 ((struct sockaddr *)&rss)->sa_len,
2322 pname, sizeof(pname), NULL, 0,
2326 "%s from %s exceeded counts/min (limit %d/min)",
2327 sep->se_service, pname,
2334 static struct conninfo *
2335 search_conn(struct servtab *sep, int ctrl)
2337 struct sockaddr_storage ss;
2338 socklen_t sslen = sizeof(ss);
2339 struct conninfo *conn;
2341 char pname[NI_MAXHOST], pname2[NI_MAXHOST];
2343 if (sep->se_maxperip <= 0)
2347 * If getpeername() fails, just let it through (if logging is
2348 * enabled the condition is caught elsewhere)
2350 if (getpeername(ctrl, (struct sockaddr *)&ss, &sslen) != 0)
2353 switch (ss.ss_family) {
2355 hv = hashval((char *)&((struct sockaddr_in *)&ss)->sin_addr,
2356 sizeof(struct in_addr));
2360 hv = hashval((char *)&((struct sockaddr_in6 *)&ss)->sin6_addr,
2361 sizeof(struct in6_addr));
2366 * Since we only support AF_INET and AF_INET6, just
2367 * let other than AF_INET and AF_INET6 through.
2372 if (getnameinfo((struct sockaddr *)&ss, sslen, pname, sizeof(pname),
2373 NULL, 0, NI_NUMERICHOST) != 0)
2376 LIST_FOREACH(conn, &sep->se_conn[hv], co_link) {
2377 if (getnameinfo((struct sockaddr *)&conn->co_addr,
2378 conn->co_addr.ss_len, pname2, sizeof(pname2), NULL, 0,
2379 NI_NUMERICHOST) == 0 &&
2380 strcmp(pname, pname2) == 0)
2385 if ((conn = malloc(sizeof(struct conninfo))) == NULL) {
2386 syslog(LOG_ERR, "malloc: %m");
2389 conn->co_proc = malloc(sep->se_maxperip * sizeof(*conn->co_proc));
2390 if (conn->co_proc == NULL) {
2391 syslog(LOG_ERR, "malloc: %m");
2394 memcpy(&conn->co_addr, (struct sockaddr *)&ss, sslen);
2395 conn->co_numchild = 0;
2396 LIST_INSERT_HEAD(&sep->se_conn[hv], conn, co_link);
2400 * Since a child process is not invoked yet, we cannot
2401 * determine a pid of a child. So, co_proc and co_numchild
2402 * should be filled leter.
2409 room_conn(struct servtab *sep, struct conninfo *conn)
2411 char pname[NI_MAXHOST];
2413 if (conn->co_numchild >= sep->se_maxperip) {
2414 getnameinfo((struct sockaddr *)&conn->co_addr,
2415 conn->co_addr.ss_len, pname, sizeof(pname), NULL, 0,
2417 syslog(LOG_ERR, "%s from %s exceeded counts (limit %d)",
2418 sep->se_service, pname, sep->se_maxperip);
2425 addchild_conn(struct conninfo *conn, pid_t pid)
2427 struct procinfo *proc;
2432 if ((proc = search_proc(pid, 1)) != NULL) {
2433 if (proc->pr_conn != NULL) {
2435 "addchild_conn: child already on process list");
2438 proc->pr_conn = conn;
2441 conn->co_proc[conn->co_numchild++] = proc;
2445 reapchild_conn(pid_t pid)
2447 struct procinfo *proc;
2448 struct conninfo *conn;
2451 if ((proc = search_proc(pid, 0)) == NULL)
2453 if ((conn = proc->pr_conn) == NULL)
2455 for (i = 0; i < conn->co_numchild; ++i)
2456 if (conn->co_proc[i] == proc) {
2457 conn->co_proc[i] = conn->co_proc[--conn->co_numchild];
2465 resize_conn(struct servtab *sep, int maxpip)
2467 struct conninfo *conn;
2470 if (sep->se_maxperip <= 0)
2476 for (i = 0; i < PERIPSIZE; ++i) {
2477 LIST_FOREACH(conn, &sep->se_conn[i], co_link) {
2478 for (j = maxpip; j < conn->co_numchild; ++j)
2479 free_proc(conn->co_proc[j]);
2480 conn->co_proc = realloc(conn->co_proc,
2481 maxpip * sizeof(*conn->co_proc));
2482 if (conn->co_proc == NULL) {
2483 syslog(LOG_ERR, "realloc: %m");
2486 if (conn->co_numchild > maxpip)
2487 conn->co_numchild = maxpip;
2493 free_connlist(struct servtab *sep)
2495 struct conninfo *conn;
2498 for (i = 0; i < PERIPSIZE; ++i) {
2499 while ((conn = LIST_FIRST(&sep->se_conn[i])) != NULL) {
2500 for (j = 0; j < conn->co_numchild; ++j)
2501 free_proc(conn->co_proc[j]);
2502 conn->co_numchild = 0;
2509 free_conn(struct conninfo *conn)
2513 if (conn->co_numchild <= 0) {
2514 LIST_REMOVE(conn, co_link);
2515 free(conn->co_proc);
2520 static struct procinfo *
2521 search_proc(pid_t pid, int add)
2523 struct procinfo *proc;
2526 hv = hashval((char *)&pid, sizeof(pid));
2527 LIST_FOREACH(proc, &proctable[hv], pr_link) {
2528 if (proc->pr_pid == pid)
2531 if (proc == NULL && add) {
2532 if ((proc = malloc(sizeof(struct procinfo))) == NULL) {
2533 syslog(LOG_ERR, "malloc: %m");
2537 proc->pr_conn = NULL;
2538 LIST_INSERT_HEAD(&proctable[hv], proc, pr_link);
2544 free_proc(struct procinfo *proc)
2548 LIST_REMOVE(proc, pr_link);
2553 hashval(char *p, int len)
2555 int i, hv = 0xABC3D20F;
2557 for (i = 0; i < len; ++i, ++p)
2558 hv = (hv << 5) ^ (hv >> 23) ^ *p;
2559 hv = (hv ^ (hv >> 16)) & (PERIPSIZE - 1);