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)
135 //#define CONFIG_FEATURE_INETD_RPC
136 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
137 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
138 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
139 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
140 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
141 //#define CONFIG_FEATURE_IPV6
143 #ifdef CONFIG_FEATURE_INETD_RPC
145 #include <rpc/pmap_clnt.h>
148 #define _PATH_INETDCONF "/etc/inetd.conf"
149 #define _PATH_INETDPID "/var/run/inetd.pid"
152 #define TOOMANY 0 /* don't start more than TOOMANY */
154 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
155 #define RETRYTIME (60*10) /* retry after bind or server fail */
157 #ifndef RLIMIT_NOFILE
158 #define RLIMIT_NOFILE RLIMIT_OFILE
165 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
166 #define FD_MARGIN (8)
167 static rlim_t rlim_ofile_cur = OPEN_MAX;
168 static struct rlimit rlim_ofile;
171 /* Check unsupporting builtin */
172 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
173 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
174 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
175 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
176 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
177 # define INETD_FEATURE_ENABLED
180 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
181 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
182 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
183 # define INETD_SETPROCTITLE
186 typedef struct servtab
188 char *se_hostaddr; /* host address to listen on */
189 char *se_service; /* name of service */
190 int se_socktype; /* type of socket to use */
191 int se_family; /* address family */
192 char *se_proto; /* protocol used */
193 #ifdef CONFIG_FEATURE_INETD_RPC
194 int se_rpcprog; /* rpc program number */
195 int se_rpcversl; /* rpc program lowest version */
196 int se_rpcversh; /* rpc program highest version */
197 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
199 #define isrpcservice(sep) 0
201 pid_t se_wait; /* single threaded server */
202 short se_checked; /* looked at during merge */
203 char *se_user; /* user name to run as */
204 char *se_group; /* group name to run as */
205 #ifdef INETD_FEATURE_ENABLED
206 const struct builtin *se_bi; /* if built-in, description */
208 char *se_server; /* server program */
210 char *se_argv[MAXARGV + 1]; /* program arguments */
211 int se_fd; /* open descriptor */
214 struct sockaddr se_un_ctrladdr;
215 struct sockaddr_in se_un_ctrladdr_in;
216 #ifdef CONFIG_FEATURE_IPV6
217 struct sockaddr_in6 se_un_ctrladdr_in6;
219 struct sockaddr_un se_un_ctrladdr_un;
220 } se_un; /* bound address */
221 #define se_ctrladdr se_un.se_un_ctrladdr
222 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
223 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
224 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
225 int se_ctrladdr_size;
226 int se_max; /* max # of instances of this service */
227 int se_count; /* number started since se_time */
228 struct timeval se_time; /* start of se_count */
229 struct servtab *se_next;
232 static servtab_t *servtab;
234 #ifdef INETD_FEATURE_ENABLED
237 const char *bi_service; /* internally provided service name */
238 int bi_socktype; /* type of socket supported */
239 short bi_fork; /* 1 if should fork before call */
240 short bi_wait; /* 1 if should wait for child */
241 void (*bi_fn) (int, servtab_t *);
244 /* Echo received data */
245 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
246 static void echo_stream (int, servtab_t *);
247 static void echo_dg (int, servtab_t *);
249 /* Internet /dev/null */
250 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
251 static void discard_stream (int, servtab_t *);
252 static void discard_dg (int, servtab_t *);
254 /* Return 32 bit time since 1900 */
255 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
256 static void machtime_stream (int, servtab_t *);
257 static void machtime_dg (int, servtab_t *);
259 /* Return human-readable time */
260 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
261 static void daytime_stream (int, servtab_t *);
262 static void daytime_dg (int, servtab_t *);
264 /* Familiar character generator */
265 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
266 static void chargen_stream (int, servtab_t *);
267 static void chargen_dg (int, servtab_t *);
270 static const struct builtin builtins[] = {
271 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
272 /* Echo received data */
273 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
274 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
276 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
277 /* Internet /dev/null */
278 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
279 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
281 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
282 /* Return 32 bit time since 1900 */
283 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
284 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
286 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
287 /* Return human-readable time */
288 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
289 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
291 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
292 /* Familiar character generator */
293 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
294 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
296 {NULL, 0, 0, 0, NULL}
298 #endif /* INETD_FEATURE_ENABLED */
300 static int global_queuelen = 128;
301 static int nsock, maxsock;
302 static fd_set allsock;
303 static int toomany = TOOMANY;
304 static int timingout;
305 static struct servent *sp;
308 static char *CONFIG = _PATH_INETDCONF;
310 static FILE *fconfig;
311 static char line[1024];
312 static char *defhost;
314 static char *newstr (char *cp)
316 if ((cp = strdup (cp ? cp : "")))
318 syslog (LOG_ERR, "strdup: %m");
322 static int setconfig (void)
325 defhost = newstr ("*");
326 if (fconfig != NULL) {
327 fseek (fconfig, 0L, SEEK_SET);
330 fconfig = fopen (CONFIG, "r");
331 return (fconfig != NULL);
334 static void endconfig (void)
337 (void) fclose (fconfig);
344 #ifdef CONFIG_FEATURE_INETD_RPC
345 static void register_rpc (servtab_t *sep)
348 struct sockaddr_in ir_sin;
352 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
353 syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
356 size = sizeof ir_sin;
357 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
358 syslog (LOG_ERR, "%s/%s: getsockname: %m",
359 sep->se_service, sep->se_proto);
363 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
364 (void) pmap_unset (sep->se_rpcprog, n);
365 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
366 syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
367 sep->se_service, sep->se_proto,
368 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
372 static void unregister_rpc (servtab_t *sep)
376 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
377 if (!pmap_unset (sep->se_rpcprog, n))
378 syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
381 #endif /* CONFIG_FEATURE_INETD_RPC */
383 static void freeconfig (servtab_t *cp)
387 free (cp->se_hostaddr);
388 free (cp->se_service);
392 free (cp->se_server);
393 for (i = 0; i < MAXARGV; i++)
394 free (cp->se_argv[i]);
397 static int bump_nofile (void)
403 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
404 syslog (LOG_ERR, "getrlimit: %m");
407 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
408 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
409 if (rl.rlim_cur <= rlim_ofile_cur) {
410 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
415 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
416 syslog (LOG_ERR, "setrlimit: %m");
420 rlim_ofile_cur = rl.rlim_cur;
424 static void setup (servtab_t *sep)
429 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
430 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
433 #define turnon(fd, opt) \
434 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
435 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
436 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
439 #ifdef CONFIG_FEATURE_INETD_RPC
440 if (isrpcservice (sep)) {
444 * for RPC services, attempt to use a reserved port
445 * if they are going to be running as root.
447 * Also, zero out the port for all RPC services; let bind()
450 sep->se_ctrladdr_in.sin_port = 0;
451 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
452 pwd->pw_uid == 0 && uid == 0)
453 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
455 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
457 socklen_t len = sep->se_ctrladdr_size;
458 int saveerrno = errno;
460 /* update se_ctrladdr_in.sin_port */
461 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
468 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
470 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
471 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
480 if (sep->se_socktype == SOCK_STREAM)
481 listen (sep->se_fd, global_queuelen);
483 FD_SET (sep->se_fd, &allsock);
485 if (sep->se_fd > maxsock) {
486 maxsock = sep->se_fd;
487 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
492 static char *nextline (void)
497 if (fgets (line, sizeof (line), fd) == NULL)
499 cp = strchr (line, '\n');
505 static char *skip (char **cpp) /* int report; */
513 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
518 while (*cp == ' ' || *cp == '\t')
524 (void) ungetc (c, fconfig);
525 if (c == ' ' || c == '\t')
526 if ((cp = nextline ()))
533 while (*cp && *cp != ' ' && *cp != '\t')
537 /* if ((*cpp = cp) == NULL) */
544 static servtab_t *new_servtab(void)
548 sep = (servtab_t *) malloc (sizeof (servtab_t));
550 syslog (LOG_ERR, bb_msg_memory_exhausted);
556 static servtab_t *dupconfig (servtab_t *sep)
561 newtab = new_servtab();
562 memset (newtab, 0, sizeof (servtab_t));
563 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
564 newtab->se_socktype = sep->se_socktype;
565 newtab->se_family = sep->se_family;
566 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
567 #ifdef CONFIG_FEATURE_INETD_RPC
568 newtab->se_rpcprog = sep->se_rpcprog;
569 newtab->se_rpcversl = sep->se_rpcversl;
570 newtab->se_rpcversh = sep->se_rpcversh;
572 newtab->se_wait = sep->se_wait;
573 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
574 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
575 #ifdef INETD_FEATURE_ENABLED
576 newtab->se_bi = sep->se_bi;
578 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
580 for (argc = 0; argc <= MAXARGV; argc++)
581 newtab->se_argv[argc] = sep->se_argv[argc] ?
582 newstr (sep->se_argv[argc]) : NULL;
583 newtab->se_max = sep->se_max;
588 static servtab_t *getconfigent (void)
599 /* memset(sep, 0, sizeof *sep); */
601 /* freeconfig(sep); */
603 while ((cp = nextline ()) && *cp == '#');
609 memset ((char *) sep, 0, sizeof *sep);
616 /* Check for a host name. */
617 hostdelim = strrchr (arg, ':');
620 sep->se_hostaddr = newstr (arg);
623 * If the line is of the form `host:', then just change the
624 * default host for the following lines.
630 defhost = sep->se_hostaddr;
635 sep->se_hostaddr = newstr (defhost);
637 sep->se_service = newstr (arg);
640 if (strcmp (arg, "stream") == 0)
641 sep->se_socktype = SOCK_STREAM;
642 else if (strcmp (arg, "dgram") == 0)
643 sep->se_socktype = SOCK_DGRAM;
644 else if (strcmp (arg, "rdm") == 0)
645 sep->se_socktype = SOCK_RDM;
646 else if (strcmp (arg, "seqpacket") == 0)
647 sep->se_socktype = SOCK_SEQPACKET;
648 else if (strcmp (arg, "raw") == 0)
649 sep->se_socktype = SOCK_RAW;
651 sep->se_socktype = -1;
653 sep->se_proto = newstr (skip (&cp));
655 if (strcmp (sep->se_proto, "unix") == 0) {
656 sep->se_family = AF_UNIX;
658 sep->se_family = AF_INET;
659 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
660 #ifdef CONFIG_FEATURE_IPV6
661 sep->se_family = AF_INET6;
663 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
665 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
666 #ifdef CONFIG_FEATURE_INETD_RPC
670 p = strchr (sep->se_service, '/');
672 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
676 l = strtol (p, &ccp, 0);
677 if (ccp == p || l < 0 || l > INT_MAX) {
679 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
682 sep->se_rpcversl = sep->se_rpcversh = l;
685 l = strtol (p, &ccp, 0);
686 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
688 sep->se_rpcversh = l;
689 } else if (*ccp != '\0')
692 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
701 char *s = strchr (arg, '.');
704 sep->se_max = atoi (s);
706 sep->se_max = toomany;
708 sep->se_wait = strcmp (arg, "wait") == 0;
709 /* if ((arg = skip(&cp, 1)) == NULL) */
711 sep->se_user = newstr (skip (&cp));
712 arg = strchr (sep->se_user, '.');
714 arg = strchr (sep->se_user, ':');
717 sep->se_group = newstr (arg);
719 /* if ((arg = skip(&cp, 1)) == NULL) */
722 sep->se_server = newstr (skip (&cp));
723 if (strcmp (sep->se_server, "internal") == 0) {
724 #ifdef INETD_FEATURE_ENABLED
725 const struct builtin *bi;
727 for (bi = builtins; bi->bi_service; bi++)
728 if (bi->bi_socktype == sep->se_socktype &&
729 strcmp (bi->bi_service, sep->se_service) == 0)
731 if (bi->bi_service == 0) {
732 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
736 sep->se_wait = bi->bi_wait;
738 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
742 #ifdef INETD_FEATURE_ENABLED
747 for (arg = skip (&cp); cp; arg = skip (&cp)) {
749 sep->se_argv[argc++] = newstr (arg);
751 while (argc <= MAXARGV)
752 sep->se_argv[argc++] = NULL;
755 * Now that we've processed the entire line, check if the hostname
756 * specifier was a comma separated list of hostnames. If so
757 * we'll make new entries for each address.
759 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
760 nsep = dupconfig (sep);
763 * NULL terminate the hostname field of the existing entry,
764 * and make a dup for the new entry.
767 nsep->se_hostaddr = newstr (hostdelim);
769 nsep->se_next = sep->se_next;
774 while (nsep != NULL) {
775 nsep->se_checked = 1;
776 if (nsep->se_family == AF_INET) {
777 if (!strcmp (nsep->se_hostaddr, "*"))
778 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
779 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
782 hp = gethostbyname (nsep->se_hostaddr);
784 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
785 nsep->se_checked = 0;
787 } else if (hp->h_addrtype != AF_INET) {
789 "%s: address isn't an Internet "
790 "address", nsep->se_hostaddr);
791 nsep->se_checked = 0;
796 memmove (&nsep->se_ctrladdr_in.sin_addr,
797 hp->h_addr_list[0], sizeof (struct in_addr));
798 while (hp->h_addr_list[i] != NULL) {
799 psep = dupconfig (nsep);
800 psep->se_hostaddr = newstr (nsep->se_hostaddr);
801 psep->se_checked = 1;
802 memmove (&psep->se_ctrladdr_in.sin_addr,
803 hp->h_addr_list[i], sizeof (struct in_addr));
804 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
806 /* Prepend to list, don't want to look up its */
807 /* hostname again. */
814 /* XXX BUG?: is this skip: label supposed to remain? */
816 nsep = nsep->se_next;
820 * Finally, free any entries which failed the gethostbyname
825 while (nsep != NULL) {
828 if (nsep->se_checked == 0) {
834 nsep = nsep->se_next;
835 psep->se_next = nsep;
839 nsep->se_checked = 0;
841 nsep = nsep->se_next;
848 #define Block_Using_Signals(m) do { sigemptyset(&m); \
849 sigaddset(&m, SIGCHLD); \
850 sigaddset(&m, SIGHUP); \
851 sigaddset(&m, SIGALRM); \
852 sigprocmask(SIG_BLOCK, &m, NULL); \
856 static servtab_t *enter (servtab_t *cp)
864 #ifdef CONFIG_FEATURE_INETD_RPC
865 sep->se_rpcprog = -1;
867 Block_Using_Signals(omask);
868 sep->se_next = servtab;
870 sigprocmask(SIG_UNBLOCK, &omask, NULL);
874 static int matchconf (servtab_t *old, servtab_t *new)
876 if (strcmp (old->se_service, new->se_service) != 0)
879 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
882 if (strcmp (old->se_proto, new->se_proto) != 0)
886 * If the new servtab is bound to a specific address, check that the
887 * old servtab is bound to the same entry. If the new service is not
888 * bound to a specific address then the check of se_hostaddr above
892 if (old->se_family == AF_INET && new->se_family == AF_INET &&
893 memcmp (&old->se_ctrladdr_in.sin_addr,
894 &new->se_ctrladdr_in.sin_addr,
895 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
898 #ifdef CONFIG_FEATURE_IPV6
899 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
900 memcmp (&old->se_ctrladdr_in6.sin6_addr,
901 &new->se_ctrladdr_in6.sin6_addr,
902 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
908 static void config (int sig ATTRIBUTE_UNUSED)
910 servtab_t *sep, *cp, **sepp;
916 syslog (LOG_ERR, "%s: %m", CONFIG);
919 for (sep = servtab; sep; sep = sep->se_next)
921 cp = getconfigent ();
923 for (sep = servtab; sep; sep = sep->se_next)
924 if (matchconf (sep, cp))
930 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
932 Block_Using_Signals(omask);
934 * sep->se_wait may be holding the pid of a daemon
935 * that we're waiting for. If so, don't overwrite
936 * it unless the config file explicitly says don't
940 #ifdef INETD_FEATURE_ENABLED
943 (sep->se_wait == 1 || cp->se_wait == 0))
944 sep->se_wait = cp->se_wait;
945 SWAP (int, cp->se_max, sep->se_max);
946 SWAP (char *, sep->se_user, cp->se_user);
947 SWAP (char *, sep->se_group, cp->se_group);
948 SWAP (char *, sep->se_server, cp->se_server);
949 for (i = 0; i < MAXARGV; i++)
950 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
953 #ifdef CONFIG_FEATURE_INETD_RPC
954 if (isrpcservice (sep))
955 unregister_rpc (sep);
956 sep->se_rpcversl = cp->se_rpcversl;
957 sep->se_rpcversh = cp->se_rpcversh;
959 sigprocmask(SIG_UNBLOCK, &omask, NULL);
966 switch (sep->se_family) {
968 if (sep->se_fd != -1)
970 (void) unlink (sep->se_service);
971 n = strlen (sep->se_service);
972 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
973 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
974 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
975 sep->se_ctrladdr_un.sun_family = AF_UNIX;
976 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
980 sep->se_ctrladdr_in.sin_family = AF_INET;
981 /* se_ctrladdr_in was set in getconfigent */
982 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
984 #ifdef CONFIG_FEATURE_INETD_RPC
985 if (isrpcservice (sep)) {
988 sep->se_rpcprog = atoi (sep->se_service);
989 if (sep->se_rpcprog == 0) {
990 rp = getrpcbyname (sep->se_service);
992 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
995 sep->se_rpcprog = rp->r_number;
997 if (sep->se_fd == -1)
999 if (sep->se_fd != -1)
1004 u_short port = htons (atoi (sep->se_service));
1007 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1008 if (isdigit (protoname[strlen (protoname) - 1]))
1009 protoname[strlen (protoname) - 1] = '\0';
1010 sp = getservbyname (sep->se_service, protoname);
1013 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1018 if (port != sep->se_ctrladdr_in.sin_port) {
1019 sep->se_ctrladdr_in.sin_port = port;
1020 if (sep->se_fd != -1) {
1021 FD_CLR (sep->se_fd, &allsock);
1023 (void) close (sep->se_fd);
1027 if (sep->se_fd == -1)
1031 #ifdef CONFIG_FEATURE_IPV6
1033 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1034 /* se_ctrladdr_in was set in getconfigent */
1035 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1037 #ifdef CONFIG_FEATURE_INETD_RPC
1038 if (isrpcservice (sep)) {
1041 sep->se_rpcprog = atoi (sep->se_service);
1042 if (sep->se_rpcprog == 0) {
1043 rp = getrpcbyname (sep->se_service);
1045 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1048 sep->se_rpcprog = rp->r_number;
1050 if (sep->se_fd == -1)
1052 if (sep->se_fd != -1)
1057 u_short port = htons (atoi (sep->se_service));
1060 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1061 if (isdigit (protoname[strlen (protoname) - 1]))
1062 protoname[strlen (protoname) - 1] = '\0';
1063 sp = getservbyname (sep->se_service, protoname);
1066 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1071 if (port != sep->se_ctrladdr_in6.sin6_port) {
1072 sep->se_ctrladdr_in6.sin6_port = port;
1073 if (sep->se_fd != -1) {
1074 FD_CLR (sep->se_fd, &allsock);
1076 (void) close (sep->se_fd);
1080 if (sep->se_fd == -1)
1084 #endif /* CONFIG_FEATURE_IPV6 */
1087 if (cp->se_next != NULL) {
1088 servtab_t *tmp = cp;
1094 cp = getconfigent ();
1099 * Purge anything not looked at above.
1101 Block_Using_Signals(omask);
1103 while ((sep = *sepp)) {
1104 if (sep->se_checked) {
1105 sepp = &sep->se_next;
1108 *sepp = sep->se_next;
1109 if (sep->se_fd != -1) {
1110 FD_CLR (sep->se_fd, &allsock);
1112 (void) close (sep->se_fd);
1114 #ifdef CONFIG_FEATURE_INETD_RPC
1115 if (isrpcservice (sep))
1116 unregister_rpc (sep);
1118 if (sep->se_family == AF_UNIX)
1119 (void) unlink (sep->se_service);
1123 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1127 static void reapchild (int sig ATTRIBUTE_UNUSED)
1130 int save_errno = errno, status;
1134 pid = wait3 (&status, WNOHANG, NULL);
1137 for (sep = servtab; sep; sep = sep->se_next)
1138 if (sep->se_wait == pid) {
1139 if (WIFEXITED (status) && WEXITSTATUS (status))
1140 syslog (LOG_WARNING,
1141 "%s: exit status 0x%x",
1142 sep->se_server, WEXITSTATUS (status));
1143 else if (WIFSIGNALED (status))
1144 syslog (LOG_WARNING,
1145 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1147 FD_SET (sep->se_fd, &allsock);
1154 static void retry (int sig ATTRIBUTE_UNUSED)
1159 for (sep = servtab; sep; sep = sep->se_next) {
1160 if (sep->se_fd == -1) {
1161 switch (sep->se_family) {
1164 #ifdef CONFIG_FEATURE_IPV6
1168 #ifdef CONFIG_FEATURE_INETD_RPC
1169 if (sep->se_fd != -1 && isrpcservice (sep))
1178 static void goaway (int sig ATTRIBUTE_UNUSED)
1182 /* XXX signal race walking sep list */
1183 for (sep = servtab; sep; sep = sep->se_next) {
1184 if (sep->se_fd == -1)
1187 switch (sep->se_family) {
1189 (void) unlink (sep->se_service);
1192 #ifdef CONFIG_FEATURE_IPV6
1195 #ifdef CONFIG_FEATURE_INETD_RPC
1196 if (sep->se_wait == 1 && isrpcservice (sep))
1197 unregister_rpc (sep); /* XXX signal race */
1201 (void) close (sep->se_fd);
1203 (void) unlink (_PATH_INETDPID);
1208 #ifdef INETD_SETPROCTITLE
1210 static char *LastArg;
1213 inetd_setproctitle (char *a, int s)
1217 struct sockaddr_in prt_sin;
1221 size = sizeof (prt_sin);
1222 (void) snprintf (buf, sizeof buf, "-%s", a);
1223 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1224 char *sa = inet_ntoa (prt_sin.sin_addr);
1226 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1231 strncpy (cp, buf, LastArg - cp);
1233 while (cp < LastArg)
1240 inetd_main (int argc, char *argv[])
1244 struct group *grp = NULL;
1246 struct sigaction sa, sapipe;
1251 sigset_t omask, wait_mask;
1253 #ifdef INETD_SETPROCTITLE
1254 extern char **environ;
1255 char **envp = environ;
1258 if (envp == 0 || *envp == 0)
1262 LastArg = envp[-1] + strlen (envp[-1]);
1265 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1267 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1271 toomany = strtoul (stoomany, &e, 0);
1272 if (!(toomany >= 0 && *e == '\0')) {
1274 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1286 bb_error_msg_and_die ("non-root must specify a config file");
1290 /* reexec for vfork() do continue parent */
1291 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1300 gid_t gid = getgid ();
1302 /* If run by hand, ensure groups vector gets trashed */
1303 setgroups (1, &gid);
1309 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1310 fprintf (fp, "%u\n", getpid ());
1315 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1316 syslog (LOG_ERR, "getrlimit: %m");
1318 rlim_ofile_cur = rlim_ofile.rlim_cur;
1319 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1320 rlim_ofile_cur = OPEN_MAX;
1323 memset ((char *) &sa, 0, sizeof (sa));
1324 sigemptyset (&sa.sa_mask);
1325 sigaddset (&sa.sa_mask, SIGALRM);
1326 sigaddset (&sa.sa_mask, SIGCHLD);
1327 sigaddset (&sa.sa_mask, SIGHUP);
1328 sa.sa_handler = retry;
1329 sigaction (SIGALRM, &sa, NULL);
1332 sa.sa_handler = config;
1333 sigaction (SIGHUP, &sa, NULL);
1334 sa.sa_handler = reapchild;
1335 sigaction (SIGCHLD, &sa, NULL);
1336 sa.sa_handler = goaway;
1337 sigaction (SIGTERM, &sa, NULL);
1338 sa.sa_handler = goaway;
1339 sigaction (SIGINT, &sa, NULL);
1340 sa.sa_handler = SIG_IGN;
1341 sigaction (SIGPIPE, &sa, &sapipe);
1342 memset(&wait_mask, 0, sizeof(wait_mask));
1344 /* space for daemons to overwrite environment for ps */
1345 #define DUMMYSIZE 100
1346 char dummy[DUMMYSIZE];
1348 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1349 dummy[DUMMYSIZE - 1] = '\0';
1351 (void) setenv ("inetd_dummy", dummy, 1);
1359 Block_Using_Signals(omask);
1361 sigsuspend (&wait_mask);
1362 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1366 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1367 if (n < 0 && errno != EINTR) {
1368 syslog (LOG_WARNING, "select: %m");
1373 for (sep = servtab; n && sep; sep = sep->se_next)
1374 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1376 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1377 ctrl = accept (sep->se_fd, NULL, NULL);
1381 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1384 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1385 struct sockaddr_in peer;
1386 socklen_t plen = sizeof (peer);
1388 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1389 syslog (LOG_WARNING, "could not getpeername");
1393 if (ntohs (peer.sin_port) == 20) {
1394 /* XXX ftp bounce */
1401 Block_Using_Signals(omask);
1403 #ifdef INETD_FEATURE_ENABLED
1404 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1407 if (sep->se_count++ == 0)
1408 (void) gettimeofday (&sep->se_time, NULL);
1409 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1412 (void) gettimeofday (&now, NULL);
1413 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1417 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1419 if (sep->se_family == AF_INET &&
1420 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1422 * Cannot close it -- there are
1423 * thieves on the system.
1424 * Simply ignore the connection.
1430 "%s/%s server failing (looping), service terminated",
1431 sep->se_service, sep->se_proto);
1432 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1434 FD_CLR (sep->se_fd, &allsock);
1435 (void) close (sep->se_fd);
1439 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1450 syslog (LOG_ERR, "fork: %m");
1451 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1453 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1457 if (pid && sep->se_wait) {
1459 FD_CLR (sep->se_fd, &allsock);
1462 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1464 #ifdef INETD_FEATURE_ENABLED
1466 (*sep->se_bi->bi_fn) (ctrl, sep);
1470 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1471 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1472 if (sep->se_socktype != SOCK_STREAM)
1473 recv (0, buf, sizeof (buf), 0);
1477 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1478 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1479 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1480 if (sep->se_socktype != SOCK_STREAM)
1481 recv (0, buf, sizeof (buf), 0);
1485 /* a user running private inetd */
1486 if (uid != pwd->pw_uid)
1488 } else if (pwd->pw_uid) {
1489 if (sep->se_group) {
1490 pwd->pw_gid = grp->gr_gid;
1492 xsetgid ((gid_t) pwd->pw_gid);
1493 initgroups (pwd->pw_name, pwd->pw_gid);
1494 xsetuid((uid_t) pwd->pw_uid);
1495 } else if (sep->se_group) {
1496 xsetgid(grp->gr_gid);
1497 setgroups (1, &grp->gr_gid);
1503 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1504 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1505 syslog (LOG_ERR, "setrlimit: %m");
1507 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1508 (void) close (tmpint);
1509 sigaction (SIGPIPE, &sapipe, NULL);
1510 execv (sep->se_server, sep->se_argv);
1511 if (sep->se_socktype != SOCK_STREAM)
1512 recv (0, buf, sizeof (buf), 0);
1513 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1517 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1524 * Internet services provided internally by inetd:
1526 #define BUFSIZE 4096
1528 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \
1529 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \
1530 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME)
1531 static int dg_badinput (struct sockaddr_in *dg_sin)
1533 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1535 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1537 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1542 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1543 /* Echo service -- echo data back */
1546 echo_stream (int s, servtab_t *sep)
1548 char buffer[BUFSIZE];
1551 inetd_setproctitle (sep->se_service, s);
1552 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1553 write (s, buffer, i) > 0);
1557 /* Echo service -- echo data back */
1560 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1562 char buffer[BUFSIZE];
1565 /* struct sockaddr_storage ss; */
1569 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1571 if (dg_badinput ((struct sockaddr_in *) &sa))
1573 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1575 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1577 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1578 /* Discard service -- ignore data */
1581 discard_stream (int s, servtab_t *sep)
1583 char buffer[BUFSIZE];
1585 inetd_setproctitle (sep->se_service, s);
1586 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1591 /* Discard service -- ignore data */
1594 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1596 char buffer[BUFSIZE];
1598 (void) read (s, buffer, sizeof (buffer));
1600 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1603 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1605 static char ring[128];
1606 static char *endring;
1615 for (i = 0; i <= 128; ++i)
1620 /* Character generator */
1623 chargen_stream (int s, servtab_t *sep)
1627 char text[LINESIZ + 2];
1629 inetd_setproctitle (sep->se_service, s);
1636 text[LINESIZ] = '\r';
1637 text[LINESIZ + 1] = '\n';
1639 if ((len = endring - rs) >= LINESIZ)
1640 memmove (text, rs, LINESIZ);
1642 memmove (text, rs, len);
1643 memmove (text + len, ring, LINESIZ - len);
1645 if (++rs == endring)
1647 if (write (s, text, sizeof (text)) != sizeof (text))
1653 /* Character generator */
1656 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1658 /* struct sockaddr_storage ss; */
1662 char text[LINESIZ + 2];
1671 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1673 if (dg_badinput ((struct sockaddr_in *) &sa))
1676 if ((len = endring - rs) >= LINESIZ)
1677 memmove (text, rs, LINESIZ);
1679 memmove (text, rs, len);
1680 memmove (text + len, ring, LINESIZ - len);
1682 if (++rs == endring)
1684 text[LINESIZ] = '\r';
1685 text[LINESIZ + 1] = '\n';
1686 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1688 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1691 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1693 * Return a machine readable date and time, in the form of the
1694 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1695 * returns the number of seconds since midnight, Jan 1, 1970,
1696 * we must add 2208988800 seconds to this figure to make up for
1697 * some seventy years Bell Labs was asleep.
1700 static u_int machtime (void)
1704 if (gettimeofday (&tv, NULL) < 0) {
1705 fprintf (stderr, "Unable to get time of day\n");
1708 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1713 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1717 result = machtime ();
1718 (void) write (s, (char *) &result, sizeof (result));
1723 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1726 /* struct sockaddr_storage ss; */
1728 struct sockaddr_in *dg_sin;
1732 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1734 /* if (dg_badinput((struct sockaddr *)&ss)) */
1735 dg_sin = (struct sockaddr_in *) &sa;
1736 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1737 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1739 result = machtime ();
1740 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1742 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1745 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1746 /* Return human-readable time of day */
1748 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1755 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1756 (void) write (s, buffer, strlen (buffer));
1759 /* Return human-readable time of day */
1762 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1766 /* struct sockaddr_storage ss; */
1770 t = time ((time_t *) 0);
1773 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1775 if (dg_badinput ((struct sockaddr_in *) &sa))
1777 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1778 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1780 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */