1 /* vi: set sw=4 ts=4: */
2 /* $Slackware: inetd.c 1.79s 2001/02/06 13:18:00 volkerdi Exp $ */
3 /* $OpenBSD: inetd.c,v 1.79 2001/01/30 08:30:57 deraadt Exp $ */
4 /* $NetBSD: inetd.c,v 1.11 1996/02/22 11:14:41 mycroft Exp $ */
5 /* Busybox port by Vladimir Oleynik (C) 2001-2005 <dzo@simtreas.ru> */
7 * Copyright (c) 1983,1991 The Regents of the University of California.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * Inetd - Internet super-server
42 * This program invokes all internet services as needed.
43 * connection-oriented services are invoked each time a
44 * connection is made, by creating a process. This process
45 * is passed the connection as file descriptor 0 and is
46 * expected to do a getpeername to find out the source host
49 * Datagram oriented services are invoked when a datagram
50 * arrives; a process is created and passed a pending message
51 * on file descriptor 0. Datagram servers may either connect
52 * to their peer, freeing up the original socket for inetd
53 * to receive further messages on, or ``take over the socket'',
54 * processing all arriving datagrams and, eventually, timing
55 * out. The first type of server is said to be ``multi-threaded'';
56 * the second type of server ``single-threaded''.
58 * Inetd uses a configuration file which is read at startup
59 * and, possibly, at some later time in response to a hangup signal.
60 * The configuration file is ``free format'' with fields given in the
61 * order shown below. Continuation lines for an entry must begin with
62 * a space or tab. All fields must be present in each entry.
64 * service name must be in /etc/services
65 * socket type stream/dgram/raw/rdm/seqpacket
66 * protocol must be in /etc/protocols
67 * wait/nowait[.max] single-threaded/multi-threaded, max #
68 * user[.group] or user[:group] user/group to run daemon as
69 * server program full path name
70 * server program arguments maximum of MAXARGS (20)
73 * service name/version must be in /etc/rpc
74 * socket type stream/dgram/raw/rdm/seqpacket
75 * protocol must be in /etc/protocols
76 * wait/nowait[.max] single-threaded/multi-threaded
77 * user[.group] or user[:group] user to run daemon as
78 * server program full path name
79 * server program arguments maximum of MAXARGS (20)
81 * For non-RPC services, the "service name" can be of the form
82 * hostaddress:servicename, in which case the hostaddress is used
83 * as the host portion of the address to listen on. If hostaddress
84 * consists of a single `*' character, INADDR_ANY is used.
86 * A line can also consist of just
88 * where hostaddress is as in the preceding paragraph. Such a line must
89 * have no further fields; the specified hostaddress is remembered and
90 * used for all further lines that have no hostaddress specified,
91 * until the next such line (or EOF). (This is why * is provided to
92 * allow explicit specification of INADDR_ANY.) A line
94 * is implicitly in effect at the beginning of the file.
96 * The hostaddress specifier may (and often will) contain dots;
97 * the service name must not.
99 * For RPC services, host-address specifiers are accepted and will
100 * work to some extent; however, because of limitations in the
101 * portmapper interface, it will not work to try to give more than
102 * one line for any given RPC service, even if the host-address
103 * specifiers are different.
105 * Comment lines are indicated by a `#' in column 1.
109 * Here's the scoop concerning the user[.:]group feature:
111 * 1) set-group-option off.
113 * a) user = root: NO setuid() or setgid() is done
115 * b) other: setgid(primary group as found in passwd)
116 * initgroups(name, primary group)
119 * 2) set-group-option on.
121 * a) user = root: setgid(specified group)
125 * b) other: setgid(specified group)
126 * initgroups(name, specified group)
134 //#define CONFIG_FEATURE_INETD_RPC
135 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
136 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
137 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
138 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
139 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
140 //#define CONFIG_FEATURE_IPV6
142 #ifdef CONFIG_FEATURE_INETD_RPC
144 #include <rpc/pmap_clnt.h>
147 #define _PATH_INETDCONF "/etc/inetd.conf"
148 #define _PATH_INETDPID "/var/run/inetd.pid"
151 #define TOOMANY 0 /* don't start more than TOOMANY */
153 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
154 #define RETRYTIME (60*10) /* retry after bind or server fail */
156 #ifndef RLIMIT_NOFILE
157 #define RLIMIT_NOFILE RLIMIT_OFILE
164 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
165 #define FD_MARGIN (8)
166 static rlim_t rlim_ofile_cur = OPEN_MAX;
167 static struct rlimit rlim_ofile;
170 /* Check unsupporting builtin */
171 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
172 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
173 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
174 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
175 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
176 # define INETD_FEATURE_ENABLED
179 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
180 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
181 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
182 # define INETD_SETPROCTITLE
185 typedef struct servtab
187 char *se_hostaddr; /* host address to listen on */
188 char *se_service; /* name of service */
189 int se_socktype; /* type of socket to use */
190 int se_family; /* address family */
191 char *se_proto; /* protocol used */
192 #ifdef CONFIG_FEATURE_INETD_RPC
193 int se_rpcprog; /* rpc program number */
194 int se_rpcversl; /* rpc program lowest version */
195 int se_rpcversh; /* rpc program highest version */
196 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
198 #define isrpcservice(sep) 0
200 pid_t se_wait; /* single threaded server */
201 short se_checked; /* looked at during merge */
202 char *se_user; /* user name to run as */
203 char *se_group; /* group name to run as */
204 #ifdef INETD_FEATURE_ENABLED
205 const struct builtin *se_bi; /* if built-in, description */
207 char *se_server; /* server program */
209 char *se_argv[MAXARGV + 1]; /* program arguments */
210 int se_fd; /* open descriptor */
213 struct sockaddr se_un_ctrladdr;
214 struct sockaddr_in se_un_ctrladdr_in;
215 #ifdef CONFIG_FEATURE_IPV6
216 struct sockaddr_in6 se_un_ctrladdr_in6;
218 struct sockaddr_un se_un_ctrladdr_un;
219 } se_un; /* bound address */
220 #define se_ctrladdr se_un.se_un_ctrladdr
221 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
222 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
223 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
224 int se_ctrladdr_size;
225 int se_max; /* max # of instances of this service */
226 int se_count; /* number started since se_time */
227 struct timeval se_time; /* start of se_count */
228 struct servtab *se_next;
231 static servtab_t *servtab;
233 #ifdef INETD_FEATURE_ENABLED
236 const char *bi_service; /* internally provided service name */
237 int bi_socktype; /* type of socket supported */
238 short bi_fork; /* 1 if should fork before call */
239 short bi_wait; /* 1 if should wait for child */
240 void (*bi_fn) (int, servtab_t *);
243 /* Echo received data */
244 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
245 static void echo_stream (int, servtab_t *);
246 static void echo_dg (int, servtab_t *);
248 /* Internet /dev/null */
249 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
250 static void discard_stream (int, servtab_t *);
251 static void discard_dg (int, servtab_t *);
253 /* Return 32 bit time since 1900 */
254 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
255 static void machtime_stream (int, servtab_t *);
256 static void machtime_dg (int, servtab_t *);
258 /* Return human-readable time */
259 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
260 static void daytime_stream (int, servtab_t *);
261 static void daytime_dg (int, servtab_t *);
263 /* Familiar character generator */
264 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
265 static void chargen_stream (int, servtab_t *);
266 static void chargen_dg (int, servtab_t *);
269 static const struct builtin builtins[] = {
270 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
271 /* Echo received data */
272 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
273 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
275 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
276 /* Internet /dev/null */
277 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
278 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
280 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
281 /* Return 32 bit time since 1900 */
282 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
283 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
285 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
286 /* Return human-readable time */
287 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
288 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
290 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
291 /* Familiar character generator */
292 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
293 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
295 {NULL, 0, 0, 0, NULL}
297 #endif /* INETD_FEATURE_ENABLED */
299 static int global_queuelen = 128;
300 static int nsock, maxsock;
301 static fd_set allsock;
302 static int toomany = TOOMANY;
303 static int timingout;
304 static struct servent *sp;
307 static char *CONFIG = _PATH_INETDCONF;
309 static FILE *fconfig;
310 static char line[1024];
311 static char *defhost;
313 static char *newstr (char *cp)
315 if ((cp = strdup (cp ? cp : "")))
317 syslog (LOG_ERR, "strdup: %m");
321 static int setconfig (void)
324 defhost = newstr ("*");
325 if (fconfig != NULL) {
326 fseek (fconfig, 0L, SEEK_SET);
329 fconfig = fopen (CONFIG, "r");
330 return (fconfig != NULL);
333 static void endconfig (void)
336 (void) fclose (fconfig);
343 #ifdef CONFIG_FEATURE_INETD_RPC
344 static void register_rpc (servtab_t *sep)
347 struct sockaddr_in ir_sin;
351 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
352 syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
355 size = sizeof ir_sin;
356 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
357 syslog (LOG_ERR, "%s/%s: getsockname: %m",
358 sep->se_service, sep->se_proto);
362 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
363 (void) pmap_unset (sep->se_rpcprog, n);
364 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
365 syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
366 sep->se_service, sep->se_proto,
367 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
371 static void unregister_rpc (servtab_t *sep)
375 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
376 if (!pmap_unset (sep->se_rpcprog, n))
377 syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
380 #endif /* CONFIG_FEATURE_INETD_RPC */
382 static void freeconfig (servtab_t *cp)
386 free (cp->se_hostaddr);
387 free (cp->se_service);
391 free (cp->se_server);
392 for (i = 0; i < MAXARGV; i++)
393 free (cp->se_argv[i]);
396 static int bump_nofile (void)
402 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
403 syslog (LOG_ERR, "getrlimit: %m");
406 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
407 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
408 if (rl.rlim_cur <= rlim_ofile_cur) {
409 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
414 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
415 syslog (LOG_ERR, "setrlimit: %m");
419 rlim_ofile_cur = rl.rlim_cur;
423 static void setup (servtab_t *sep)
428 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
429 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
432 #define turnon(fd, opt) \
433 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
434 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
435 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
438 #ifdef CONFIG_FEATURE_INETD_RPC
439 if (isrpcservice (sep)) {
443 * for RPC services, attempt to use a reserved port
444 * if they are going to be running as root.
446 * Also, zero out the port for all RPC services; let bind()
449 sep->se_ctrladdr_in.sin_port = 0;
450 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
451 pwd->pw_uid == 0 && uid == 0)
452 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
454 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
456 socklen_t len = sep->se_ctrladdr_size;
457 int saveerrno = errno;
459 /* update se_ctrladdr_in.sin_port */
460 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
467 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
469 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
470 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
479 if (sep->se_socktype == SOCK_STREAM)
480 listen (sep->se_fd, global_queuelen);
482 FD_SET (sep->se_fd, &allsock);
484 if (sep->se_fd > maxsock) {
485 maxsock = sep->se_fd;
486 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
491 static char *nextline (void)
496 if (fgets (line, sizeof (line), fd) == NULL)
498 cp = strchr (line, '\n');
504 static char *skip (char **cpp) /* int report; */
512 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
517 while (*cp == ' ' || *cp == '\t')
523 (void) ungetc (c, fconfig);
524 if (c == ' ' || c == '\t')
525 if ((cp = nextline ()))
532 while (*cp && *cp != ' ' && *cp != '\t')
536 /* if ((*cpp = cp) == NULL) */
543 static servtab_t *new_servtab(void)
547 sep = (servtab_t *) malloc (sizeof (servtab_t));
549 syslog (LOG_ERR, bb_msg_memory_exhausted);
555 static servtab_t *dupconfig (servtab_t *sep)
560 newtab = new_servtab();
561 memset (newtab, 0, sizeof (servtab_t));
562 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
563 newtab->se_socktype = sep->se_socktype;
564 newtab->se_family = sep->se_family;
565 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
566 #ifdef CONFIG_FEATURE_INETD_RPC
567 newtab->se_rpcprog = sep->se_rpcprog;
568 newtab->se_rpcversl = sep->se_rpcversl;
569 newtab->se_rpcversh = sep->se_rpcversh;
571 newtab->se_wait = sep->se_wait;
572 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
573 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
574 #ifdef INETD_FEATURE_ENABLED
575 newtab->se_bi = sep->se_bi;
577 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
579 for (argc = 0; argc <= MAXARGV; argc++)
580 newtab->se_argv[argc] = sep->se_argv[argc] ?
581 newstr (sep->se_argv[argc]) : NULL;
582 newtab->se_max = sep->se_max;
587 static servtab_t *getconfigent (void)
598 /* memset(sep, 0, sizeof *sep); */
600 /* freeconfig(sep); */
602 while ((cp = nextline ()) && *cp == '#');
608 memset ((char *) sep, 0, sizeof *sep);
615 /* Check for a host name. */
616 hostdelim = strrchr (arg, ':');
619 sep->se_hostaddr = newstr (arg);
622 * If the line is of the form `host:', then just change the
623 * default host for the following lines.
629 defhost = sep->se_hostaddr;
634 sep->se_hostaddr = newstr (defhost);
636 sep->se_service = newstr (arg);
639 if (strcmp (arg, "stream") == 0)
640 sep->se_socktype = SOCK_STREAM;
641 else if (strcmp (arg, "dgram") == 0)
642 sep->se_socktype = SOCK_DGRAM;
643 else if (strcmp (arg, "rdm") == 0)
644 sep->se_socktype = SOCK_RDM;
645 else if (strcmp (arg, "seqpacket") == 0)
646 sep->se_socktype = SOCK_SEQPACKET;
647 else if (strcmp (arg, "raw") == 0)
648 sep->se_socktype = SOCK_RAW;
650 sep->se_socktype = -1;
652 sep->se_proto = newstr (skip (&cp));
654 if (strcmp (sep->se_proto, "unix") == 0) {
655 sep->se_family = AF_UNIX;
657 sep->se_family = AF_INET;
658 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
659 #ifdef CONFIG_FEATURE_IPV6
660 sep->se_family = AF_INET6;
662 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
664 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
665 #ifdef CONFIG_FEATURE_INETD_RPC
669 p = strchr (sep->se_service, '/');
671 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
675 l = strtol (p, &ccp, 0);
676 if (ccp == p || l < 0 || l > INT_MAX) {
678 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
681 sep->se_rpcversl = sep->se_rpcversh = l;
684 l = strtol (p, &ccp, 0);
685 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
687 sep->se_rpcversh = l;
688 } else if (*ccp != '\0')
691 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
700 char *s = strchr (arg, '.');
703 sep->se_max = atoi (s);
705 sep->se_max = toomany;
707 sep->se_wait = strcmp (arg, "wait") == 0;
708 /* if ((arg = skip(&cp, 1)) == NULL) */
710 sep->se_user = newstr (skip (&cp));
711 arg = strchr (sep->se_user, '.');
713 arg = strchr (sep->se_user, ':');
716 sep->se_group = newstr (arg);
718 /* if ((arg = skip(&cp, 1)) == NULL) */
721 sep->se_server = newstr (skip (&cp));
722 if (strcmp (sep->se_server, "internal") == 0) {
723 #ifdef INETD_FEATURE_ENABLED
724 const struct builtin *bi;
726 for (bi = builtins; bi->bi_service; bi++)
727 if (bi->bi_socktype == sep->se_socktype &&
728 strcmp (bi->bi_service, sep->se_service) == 0)
730 if (bi->bi_service == 0) {
731 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
735 sep->se_wait = bi->bi_wait;
737 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
741 #ifdef INETD_FEATURE_ENABLED
746 for (arg = skip (&cp); cp; arg = skip (&cp)) {
748 sep->se_argv[argc++] = newstr (arg);
750 while (argc <= MAXARGV)
751 sep->se_argv[argc++] = NULL;
754 * Now that we've processed the entire line, check if the hostname
755 * specifier was a comma separated list of hostnames. If so
756 * we'll make new entries for each address.
758 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
759 nsep = dupconfig (sep);
762 * NULL terminate the hostname field of the existing entry,
763 * and make a dup for the new entry.
766 nsep->se_hostaddr = newstr (hostdelim);
768 nsep->se_next = sep->se_next;
773 while (nsep != NULL) {
774 nsep->se_checked = 1;
775 if (nsep->se_family == AF_INET) {
776 if (!strcmp (nsep->se_hostaddr, "*"))
777 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
778 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
781 hp = gethostbyname (nsep->se_hostaddr);
783 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
784 nsep->se_checked = 0;
786 } else if (hp->h_addrtype != AF_INET) {
788 "%s: address isn't an Internet "
789 "address", nsep->se_hostaddr);
790 nsep->se_checked = 0;
795 memmove (&nsep->se_ctrladdr_in.sin_addr,
796 hp->h_addr_list[0], sizeof (struct in_addr));
797 while (hp->h_addr_list[i] != NULL) {
798 psep = dupconfig (nsep);
799 psep->se_hostaddr = newstr (nsep->se_hostaddr);
800 psep->se_checked = 1;
801 memmove (&psep->se_ctrladdr_in.sin_addr,
802 hp->h_addr_list[i], sizeof (struct in_addr));
803 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
805 /* Prepend to list, don't want to look up its */
806 /* hostname again. */
813 /* XXX BUG?: is this skip: label supposed to remain? */
815 nsep = nsep->se_next;
819 * Finally, free any entries which failed the gethostbyname
824 while (nsep != NULL) {
827 if (nsep->se_checked == 0) {
833 nsep = nsep->se_next;
834 psep->se_next = nsep;
838 nsep->se_checked = 0;
840 nsep = nsep->se_next;
847 #define Block_Using_Signals(m) do { sigemptyset(&m); \
848 sigaddset(&m, SIGCHLD); \
849 sigaddset(&m, SIGHUP); \
850 sigaddset(&m, SIGALRM); \
851 sigprocmask(SIG_BLOCK, &m, NULL); \
855 static servtab_t *enter (servtab_t *cp)
863 #ifdef CONFIG_FEATURE_INETD_RPC
864 sep->se_rpcprog = -1;
866 Block_Using_Signals(omask);
867 sep->se_next = servtab;
869 sigprocmask(SIG_UNBLOCK, &omask, NULL);
873 static int matchconf (servtab_t *old, servtab_t *new)
875 if (strcmp (old->se_service, new->se_service) != 0)
878 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
881 if (strcmp (old->se_proto, new->se_proto) != 0)
885 * If the new servtab is bound to a specific address, check that the
886 * old servtab is bound to the same entry. If the new service is not
887 * bound to a specific address then the check of se_hostaddr above
891 if (old->se_family == AF_INET && new->se_family == AF_INET &&
892 memcmp (&old->se_ctrladdr_in.sin_addr,
893 &new->se_ctrladdr_in.sin_addr,
894 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
897 #ifdef CONFIG_FEATURE_IPV6
898 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
899 memcmp (&old->se_ctrladdr_in6.sin6_addr,
900 &new->se_ctrladdr_in6.sin6_addr,
901 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
907 static void config (int sig ATTRIBUTE_UNUSED)
909 servtab_t *sep, *cp, **sepp;
915 syslog (LOG_ERR, "%s: %m", CONFIG);
918 for (sep = servtab; sep; sep = sep->se_next)
920 cp = getconfigent ();
922 for (sep = servtab; sep; sep = sep->se_next)
923 if (matchconf (sep, cp))
929 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
931 Block_Using_Signals(omask);
933 * sep->se_wait may be holding the pid of a daemon
934 * that we're waiting for. If so, don't overwrite
935 * it unless the config file explicitly says don't
939 #ifdef INETD_FEATURE_ENABLED
942 (sep->se_wait == 1 || cp->se_wait == 0))
943 sep->se_wait = cp->se_wait;
944 SWAP (int, cp->se_max, sep->se_max);
945 SWAP (char *, sep->se_user, cp->se_user);
946 SWAP (char *, sep->se_group, cp->se_group);
947 SWAP (char *, sep->se_server, cp->se_server);
948 for (i = 0; i < MAXARGV; i++)
949 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
952 #ifdef CONFIG_FEATURE_INETD_RPC
953 if (isrpcservice (sep))
954 unregister_rpc (sep);
955 sep->se_rpcversl = cp->se_rpcversl;
956 sep->se_rpcversh = cp->se_rpcversh;
958 sigprocmask(SIG_UNBLOCK, &omask, NULL);
965 switch (sep->se_family) {
967 if (sep->se_fd != -1)
969 (void) unlink (sep->se_service);
970 n = strlen (sep->se_service);
971 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
972 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
973 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
974 sep->se_ctrladdr_un.sun_family = AF_UNIX;
975 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
979 sep->se_ctrladdr_in.sin_family = AF_INET;
980 /* se_ctrladdr_in was set in getconfigent */
981 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
983 #ifdef CONFIG_FEATURE_INETD_RPC
984 if (isrpcservice (sep)) {
987 sep->se_rpcprog = atoi (sep->se_service);
988 if (sep->se_rpcprog == 0) {
989 rp = getrpcbyname (sep->se_service);
991 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
994 sep->se_rpcprog = rp->r_number;
996 if (sep->se_fd == -1)
998 if (sep->se_fd != -1)
1003 u_short port = htons (atoi (sep->se_service));
1006 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1007 if (isdigit (protoname[strlen (protoname) - 1]))
1008 protoname[strlen (protoname) - 1] = '\0';
1009 sp = getservbyname (sep->se_service, protoname);
1012 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1017 if (port != sep->se_ctrladdr_in.sin_port) {
1018 sep->se_ctrladdr_in.sin_port = port;
1019 if (sep->se_fd != -1) {
1020 FD_CLR (sep->se_fd, &allsock);
1022 (void) close (sep->se_fd);
1026 if (sep->se_fd == -1)
1030 #ifdef CONFIG_FEATURE_IPV6
1032 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1033 /* se_ctrladdr_in was set in getconfigent */
1034 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1036 #ifdef CONFIG_FEATURE_INETD_RPC
1037 if (isrpcservice (sep)) {
1040 sep->se_rpcprog = atoi (sep->se_service);
1041 if (sep->se_rpcprog == 0) {
1042 rp = getrpcbyname (sep->se_service);
1044 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1047 sep->se_rpcprog = rp->r_number;
1049 if (sep->se_fd == -1)
1051 if (sep->se_fd != -1)
1056 u_short port = htons (atoi (sep->se_service));
1059 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1060 if (isdigit (protoname[strlen (protoname) - 1]))
1061 protoname[strlen (protoname) - 1] = '\0';
1062 sp = getservbyname (sep->se_service, protoname);
1065 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1070 if (port != sep->se_ctrladdr_in6.sin6_port) {
1071 sep->se_ctrladdr_in6.sin6_port = port;
1072 if (sep->se_fd != -1) {
1073 FD_CLR (sep->se_fd, &allsock);
1075 (void) close (sep->se_fd);
1079 if (sep->se_fd == -1)
1083 #endif /* CONFIG_FEATURE_IPV6 */
1086 if (cp->se_next != NULL) {
1087 servtab_t *tmp = cp;
1093 cp = getconfigent ();
1098 * Purge anything not looked at above.
1100 Block_Using_Signals(omask);
1102 while ((sep = *sepp)) {
1103 if (sep->se_checked) {
1104 sepp = &sep->se_next;
1107 *sepp = sep->se_next;
1108 if (sep->se_fd != -1) {
1109 FD_CLR (sep->se_fd, &allsock);
1111 (void) close (sep->se_fd);
1113 #ifdef CONFIG_FEATURE_INETD_RPC
1114 if (isrpcservice (sep))
1115 unregister_rpc (sep);
1117 if (sep->se_family == AF_UNIX)
1118 (void) unlink (sep->se_service);
1122 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1126 static void reapchild (int sig ATTRIBUTE_UNUSED)
1129 int save_errno = errno, status;
1133 pid = wait3 (&status, WNOHANG, NULL);
1136 for (sep = servtab; sep; sep = sep->se_next)
1137 if (sep->se_wait == pid) {
1138 if (WIFEXITED (status) && WEXITSTATUS (status))
1139 syslog (LOG_WARNING,
1140 "%s: exit status 0x%x",
1141 sep->se_server, WEXITSTATUS (status));
1142 else if (WIFSIGNALED (status))
1143 syslog (LOG_WARNING,
1144 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1146 FD_SET (sep->se_fd, &allsock);
1153 static void retry (int sig ATTRIBUTE_UNUSED)
1158 for (sep = servtab; sep; sep = sep->se_next) {
1159 if (sep->se_fd == -1) {
1160 switch (sep->se_family) {
1163 #ifdef CONFIG_FEATURE_IPV6
1167 #ifdef CONFIG_FEATURE_INETD_RPC
1168 if (sep->se_fd != -1 && isrpcservice (sep))
1177 static void goaway (int sig ATTRIBUTE_UNUSED)
1181 /* XXX signal race walking sep list */
1182 for (sep = servtab; sep; sep = sep->se_next) {
1183 if (sep->se_fd == -1)
1186 switch (sep->se_family) {
1188 (void) unlink (sep->se_service);
1191 #ifdef CONFIG_FEATURE_IPV6
1194 #ifdef CONFIG_FEATURE_INETD_RPC
1195 if (sep->se_wait == 1 && isrpcservice (sep))
1196 unregister_rpc (sep); /* XXX signal race */
1200 (void) close (sep->se_fd);
1202 (void) unlink (_PATH_INETDPID);
1207 #ifdef INETD_SETPROCTITLE
1209 static char *LastArg;
1212 inetd_setproctitle (char *a, int s)
1216 struct sockaddr_in prt_sin;
1220 size = sizeof (prt_sin);
1221 (void) snprintf (buf, sizeof buf, "-%s", a);
1222 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1223 char *sa = inet_ntoa (prt_sin.sin_addr);
1225 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1230 strncpy (cp, buf, LastArg - cp);
1232 while (cp < LastArg)
1239 inetd_main (int argc, char *argv[])
1243 struct group *grp = NULL;
1245 struct sigaction sa, sapipe;
1250 sigset_t omask, wait_mask;
1252 #ifdef INETD_SETPROCTITLE
1253 extern char **environ;
1254 char **envp = environ;
1257 if (envp == 0 || *envp == 0)
1261 LastArg = envp[-1] + strlen (envp[-1]);
1264 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1266 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1270 toomany = strtoul (stoomany, &e, 0);
1271 if (!(toomany >= 0 && *e == '\0')) {
1273 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1285 bb_error_msg_and_die ("non-root must specify a config file");
1289 /* reexec for vfork() do continue parent */
1290 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1299 gid_t gid = getgid ();
1301 /* If run by hand, ensure groups vector gets trashed */
1302 setgroups (1, &gid);
1308 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1309 fprintf (fp, "%u\n", getpid ());
1314 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1315 syslog (LOG_ERR, "getrlimit: %m");
1317 rlim_ofile_cur = rlim_ofile.rlim_cur;
1318 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1319 rlim_ofile_cur = OPEN_MAX;
1322 memset ((char *) &sa, 0, sizeof (sa));
1323 sigemptyset (&sa.sa_mask);
1324 sigaddset (&sa.sa_mask, SIGALRM);
1325 sigaddset (&sa.sa_mask, SIGCHLD);
1326 sigaddset (&sa.sa_mask, SIGHUP);
1327 sa.sa_handler = retry;
1328 sigaction (SIGALRM, &sa, NULL);
1331 sa.sa_handler = config;
1332 sigaction (SIGHUP, &sa, NULL);
1333 sa.sa_handler = reapchild;
1334 sigaction (SIGCHLD, &sa, NULL);
1335 sa.sa_handler = goaway;
1336 sigaction (SIGTERM, &sa, NULL);
1337 sa.sa_handler = goaway;
1338 sigaction (SIGINT, &sa, NULL);
1339 sa.sa_handler = SIG_IGN;
1340 sigaction (SIGPIPE, &sa, &sapipe);
1341 memset(&wait_mask, 0, sizeof(wait_mask));
1343 /* space for daemons to overwrite environment for ps */
1344 #define DUMMYSIZE 100
1345 char dummy[DUMMYSIZE];
1347 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1348 dummy[DUMMYSIZE - 1] = '\0';
1350 (void) setenv ("inetd_dummy", dummy, 1);
1358 Block_Using_Signals(omask);
1360 sigsuspend (&wait_mask);
1361 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1365 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1366 if (n < 0 && errno != EINTR) {
1367 syslog (LOG_WARNING, "select: %m");
1372 for (sep = servtab; n && sep; sep = sep->se_next)
1373 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1375 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1376 ctrl = accept (sep->se_fd, NULL, NULL);
1380 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1383 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1384 struct sockaddr_in peer;
1385 socklen_t plen = sizeof (peer);
1387 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1388 syslog (LOG_WARNING, "could not getpeername");
1392 if (ntohs (peer.sin_port) == 20) {
1393 /* XXX ftp bounce */
1400 Block_Using_Signals(omask);
1402 #ifdef INETD_FEATURE_ENABLED
1403 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1406 if (sep->se_count++ == 0)
1407 (void) gettimeofday (&sep->se_time, NULL);
1408 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1411 (void) gettimeofday (&now, NULL);
1412 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1416 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1418 if (sep->se_family == AF_INET &&
1419 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1421 * Cannot close it -- there are
1422 * thieves on the system.
1423 * Simply ignore the connection.
1429 "%s/%s server failing (looping), service terminated",
1430 sep->se_service, sep->se_proto);
1431 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1433 FD_CLR (sep->se_fd, &allsock);
1434 (void) close (sep->se_fd);
1438 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1449 syslog (LOG_ERR, "fork: %m");
1450 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1452 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1456 if (pid && sep->se_wait) {
1458 FD_CLR (sep->se_fd, &allsock);
1461 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1463 #ifdef INETD_FEATURE_ENABLED
1465 (*sep->se_bi->bi_fn) (ctrl, sep);
1469 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1470 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1471 if (sep->se_socktype != SOCK_STREAM)
1472 recv (0, buf, sizeof (buf), 0);
1476 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1477 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1478 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1479 if (sep->se_socktype != SOCK_STREAM)
1480 recv (0, buf, sizeof (buf), 0);
1484 /* a user running private inetd */
1485 if (uid != pwd->pw_uid)
1487 } else if (pwd->pw_uid) {
1488 if (sep->se_group) {
1489 pwd->pw_gid = grp->gr_gid;
1491 xsetgid ((gid_t) pwd->pw_gid);
1492 initgroups (pwd->pw_name, pwd->pw_gid);
1493 xsetuid((uid_t) pwd->pw_uid);
1494 } else if (sep->se_group) {
1495 xsetgid(grp->gr_gid);
1496 setgroups (1, &grp->gr_gid);
1502 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1503 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1504 syslog (LOG_ERR, "setrlimit: %m");
1506 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1507 (void) close (tmpint);
1508 sigaction (SIGPIPE, &sapipe, NULL);
1509 execv (sep->se_server, sep->se_argv);
1510 if (sep->se_socktype != SOCK_STREAM)
1511 recv (0, buf, sizeof (buf), 0);
1512 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1516 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1523 * Internet services provided internally by inetd:
1525 #define BUFSIZE 4096
1527 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \
1528 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \
1529 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME)
1530 static int dg_badinput (struct sockaddr_in *dg_sin)
1532 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1534 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1536 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1541 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1542 /* Echo service -- echo data back */
1545 echo_stream (int s, servtab_t *sep)
1547 char buffer[BUFSIZE];
1550 inetd_setproctitle (sep->se_service, s);
1551 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1552 write (s, buffer, i) > 0);
1556 /* Echo service -- echo data back */
1559 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1561 char buffer[BUFSIZE];
1564 /* struct sockaddr_storage ss; */
1568 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1570 if (dg_badinput ((struct sockaddr_in *) &sa))
1572 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1574 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1576 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1577 /* Discard service -- ignore data */
1580 discard_stream (int s, servtab_t *sep)
1582 char buffer[BUFSIZE];
1584 inetd_setproctitle (sep->se_service, s);
1585 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1590 /* Discard service -- ignore data */
1593 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1595 char buffer[BUFSIZE];
1597 (void) read (s, buffer, sizeof (buffer));
1599 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1602 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1604 static char ring[128];
1605 static char *endring;
1614 for (i = 0; i <= 128; ++i)
1619 /* Character generator */
1622 chargen_stream (int s, servtab_t *sep)
1626 char text[LINESIZ + 2];
1628 inetd_setproctitle (sep->se_service, s);
1635 text[LINESIZ] = '\r';
1636 text[LINESIZ + 1] = '\n';
1638 if ((len = endring - rs) >= LINESIZ)
1639 memmove (text, rs, LINESIZ);
1641 memmove (text, rs, len);
1642 memmove (text + len, ring, LINESIZ - len);
1644 if (++rs == endring)
1646 if (write (s, text, sizeof (text)) != sizeof (text))
1652 /* Character generator */
1655 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1657 /* struct sockaddr_storage ss; */
1661 char text[LINESIZ + 2];
1670 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1672 if (dg_badinput ((struct sockaddr_in *) &sa))
1675 if ((len = endring - rs) >= LINESIZ)
1676 memmove (text, rs, LINESIZ);
1678 memmove (text, rs, len);
1679 memmove (text + len, ring, LINESIZ - len);
1681 if (++rs == endring)
1683 text[LINESIZ] = '\r';
1684 text[LINESIZ + 1] = '\n';
1685 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1687 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1690 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1692 * Return a machine readable date and time, in the form of the
1693 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1694 * returns the number of seconds since midnight, Jan 1, 1970,
1695 * we must add 2208988800 seconds to this figure to make up for
1696 * some seventy years Bell Labs was asleep.
1699 static u_int machtime (void)
1703 if (gettimeofday (&tv, NULL) < 0) {
1704 fprintf (stderr, "Unable to get time of day\n");
1707 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1712 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1716 result = machtime ();
1717 (void) write (s, (char *) &result, sizeof (result));
1722 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1725 /* struct sockaddr_storage ss; */
1727 struct sockaddr_in *dg_sin;
1731 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1733 /* if (dg_badinput((struct sockaddr *)&ss)) */
1734 dg_sin = (struct sockaddr_in *) &sa;
1735 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1736 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1738 result = machtime ();
1739 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1741 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1744 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1745 /* Return human-readable time of day */
1747 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1754 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1755 (void) write (s, buffer, strlen (buffer));
1758 /* Return human-readable time of day */
1761 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1765 /* struct sockaddr_storage ss; */
1769 t = time ((time_t *) 0);
1772 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1774 if (dg_badinput ((struct sockaddr_in *) &sa))
1776 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1777 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1779 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */