1 /* $Slackware: inetd.c 1.79s 2001/02/06 13:18:00 volkerdi Exp $ */
2 /* $OpenBSD: inetd.c,v 1.79 2001/01/30 08:30:57 deraadt Exp $ */
3 /* $NetBSD: inetd.c,v 1.11 1996/02/22 11:14:41 mycroft Exp $ */
4 /* Busybox port by Vladimir Oleynik (C) 2001-2005 <dzo@simtreas.ru> */
6 * Copyright (c) 1983,1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * Inetd - Internet super-server
41 * This program invokes all internet services as needed.
42 * connection-oriented services are invoked each time a
43 * connection is made, by creating a process. This process
44 * is passed the connection as file descriptor 0 and is
45 * expected to do a getpeername to find out the source host
48 * Datagram oriented services are invoked when a datagram
49 * arrives; a process is created and passed a pending message
50 * on file descriptor 0. Datagram servers may either connect
51 * to their peer, freeing up the original socket for inetd
52 * to receive further messages on, or ``take over the socket'',
53 * processing all arriving datagrams and, eventually, timing
54 * out. The first type of server is said to be ``multi-threaded'';
55 * the second type of server ``single-threaded''.
57 * Inetd uses a configuration file which is read at startup
58 * and, possibly, at some later time in response to a hangup signal.
59 * The configuration file is ``free format'' with fields given in the
60 * order shown below. Continuation lines for an entry must begin with
61 * a space or tab. All fields must be present in each entry.
63 * service name must be in /etc/services
64 * socket type stream/dgram/raw/rdm/seqpacket
65 * protocol must be in /etc/protocols
66 * wait/nowait[.max] single-threaded/multi-threaded, max #
67 * user[.group] or user[:group] user/group to run daemon as
68 * server program full path name
69 * server program arguments maximum of MAXARGS (20)
72 * service name/version must be in /etc/rpc
73 * socket type stream/dgram/raw/rdm/seqpacket
74 * protocol must be in /etc/protocols
75 * wait/nowait[.max] single-threaded/multi-threaded
76 * user[.group] or user[:group] user to run daemon as
77 * server program full path name
78 * server program arguments maximum of MAXARGS (20)
80 * For non-RPC services, the "service name" can be of the form
81 * hostaddress:servicename, in which case the hostaddress is used
82 * as the host portion of the address to listen on. If hostaddress
83 * consists of a single `*' character, INADDR_ANY is used.
85 * A line can also consist of just
87 * where hostaddress is as in the preceding paragraph. Such a line must
88 * have no further fields; the specified hostaddress is remembered and
89 * used for all further lines that have no hostaddress specified,
90 * until the next such line (or EOF). (This is why * is provided to
91 * allow explicit specification of INADDR_ANY.) A line
93 * is implicitly in effect at the beginning of the file.
95 * The hostaddress specifier may (and often will) contain dots;
96 * the service name must not.
98 * For RPC services, host-address specifiers are accepted and will
99 * work to some extent; however, because of limitations in the
100 * portmapper interface, it will not work to try to give more than
101 * one line for any given RPC service, even if the host-address
102 * specifiers are different.
104 * Comment lines are indicated by a `#' in column 1.
108 * Here's the scoop concerning the user[.:]group feature:
110 * 1) set-group-option off.
112 * a) user = root: NO setuid() or setgid() is done
114 * b) other: setgid(primary group as found in passwd)
115 * initgroups(name, primary group)
118 * 2) set-group-option on.
120 * a) user = root: setgid(specified group)
124 * b) other: setgid(specified group)
125 * initgroups(name, specified group)
130 #include <sys/param.h>
131 #include <sys/stat.h>
132 #include <sys/ioctl.h>
133 #include <sys/socket.h>
135 #include <sys/file.h>
136 #include <sys/wait.h>
137 #include <sys/time.h>
138 #include <sys/resource.h>
141 #include <netinet/in.h>
142 #include <arpa/inet.h>
157 //#define CONFIG_FEATURE_INETD_RPC
158 //#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
159 //#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
160 //#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
161 //#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
162 //#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
163 //#define CONFIG_FEATURE_IPV6
165 #ifdef CONFIG_FEATURE_INETD_RPC
167 #include <rpc/pmap_clnt.h>
168 #include <rpcsvc/nfs_prot.h>
171 #define _PATH_INETDCONF "/etc/inetd.conf"
172 #define _PATH_INETDPID "/var/run/inetd.pid"
175 #define TOOMANY 0 /* don't start more than TOOMANY */
177 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
178 #define RETRYTIME (60*10) /* retry after bind or server fail */
180 #ifndef RLIMIT_NOFILE
181 #define RLIMIT_NOFILE RLIMIT_OFILE
188 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
189 #define FD_MARGIN (8)
190 static rlim_t rlim_ofile_cur = OPEN_MAX;
191 static struct rlimit rlim_ofile;
194 /* Check unsupporting builtin */
195 #if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
196 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD || \
197 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME || \
198 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME || \
199 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
200 # define INETD_FEATURE_ENABLED
203 #if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
204 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD || \
205 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
206 # define INETD_SETPROCTITLE
209 typedef struct servtab
211 char *se_hostaddr; /* host address to listen on */
212 char *se_service; /* name of service */
213 int se_socktype; /* type of socket to use */
214 int se_family; /* address family */
215 char *se_proto; /* protocol used */
216 #ifdef CONFIG_FEATURE_INETD_RPC
217 int se_rpcprog; /* rpc program number */
218 int se_rpcversl; /* rpc program lowest version */
219 int se_rpcversh; /* rpc program highest version */
220 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
222 #define isrpcservice(sep) 0
224 pid_t se_wait; /* single threaded server */
225 short se_checked; /* looked at during merge */
226 char *se_user; /* user name to run as */
227 char *se_group; /* group name to run as */
228 #ifdef INETD_FEATURE_ENABLED
229 const struct biltin *se_bi; /* if built-in, description */
231 char *se_server; /* server program */
233 char *se_argv[MAXARGV + 1]; /* program arguments */
234 int se_fd; /* open descriptor */
237 struct sockaddr se_un_ctrladdr;
238 struct sockaddr_in se_un_ctrladdr_in;
239 #ifdef CONFIG_FEATURE_IPV6
240 struct sockaddr_in6 se_un_ctrladdr_in6;
242 struct sockaddr_un se_un_ctrladdr_un;
243 } se_un; /* bound address */
244 #define se_ctrladdr se_un.se_un_ctrladdr
245 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
246 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
247 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
248 int se_ctrladdr_size;
249 int se_max; /* max # of instances of this service */
250 int se_count; /* number started since se_time */
251 struct timeval se_time; /* start of se_count */
252 struct servtab *se_next;
255 static servtab_t *servtab;
257 #ifdef INETD_FEATURE_ENABLED
260 const char *bi_service; /* internally provided service name */
261 int bi_socktype; /* type of socket supported */
262 short bi_fork; /* 1 if should fork before call */
263 short bi_wait; /* 1 if should wait for child */
264 void (*bi_fn) (int, servtab_t *);
267 /* Echo received data */
268 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
269 static void echo_stream (int, servtab_t *);
270 static void echo_dg (int, servtab_t *);
272 /* Internet /dev/null */
273 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
274 static void discard_stream (int, servtab_t *);
275 static void discard_dg (int, servtab_t *);
277 /* Return 32 bit time since 1900 */
278 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
279 static void machtime_stream (int, servtab_t *);
280 static void machtime_dg (int, servtab_t *);
282 /* Return human-readable time */
283 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
284 static void daytime_stream (int, servtab_t *);
285 static void daytime_dg (int, servtab_t *);
287 /* Familiar character generator */
288 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
289 static void chargen_stream (int, servtab_t *);
290 static void chargen_dg (int, servtab_t *);
293 static const struct biltin biltins[] = {
294 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
295 /* Echo received data */
296 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
297 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
299 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
300 /* Internet /dev/null */
301 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
302 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
304 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
305 /* Return 32 bit time since 1900 */
306 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
307 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
309 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
310 /* Return human-readable time */
311 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
312 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
314 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
315 /* Familiar character generator */
316 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
317 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
319 {NULL, 0, 0, 0, NULL}
321 #endif /* INETD_FEATURE_ENABLED */
323 static int global_queuelen = 128;
324 static int nsock, maxsock;
325 static fd_set allsock;
326 static int toomany = TOOMANY;
327 static int timingout;
328 static struct servent *sp;
331 static char *CONFIG = _PATH_INETDCONF;
333 static FILE *fconfig;
334 static char line[1024];
335 static char *defhost;
337 static char *newstr (char *cp)
339 if ((cp = strdup (cp ? cp : "")))
341 syslog (LOG_ERR, "strdup: %m");
345 static int setconfig (void)
348 defhost = newstr ("*");
349 if (fconfig != NULL) {
350 fseek (fconfig, 0L, SEEK_SET);
353 fconfig = fopen (CONFIG, "r");
354 return (fconfig != NULL);
357 static void endconfig (void)
360 (void) fclose (fconfig);
367 #ifdef CONFIG_FEATURE_INETD_RPC
368 static void register_rpc (servtab_t *sep)
371 struct sockaddr_in ir_sin;
375 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
376 syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
379 size = sizeof ir_sin;
380 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
381 syslog (LOG_ERR, "%s/%s: getsockname: %m",
382 sep->se_service, sep->se_proto);
386 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
387 (void) pmap_unset (sep->se_rpcprog, n);
388 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
389 syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
390 sep->se_service, sep->se_proto,
391 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
395 static void unregister_rpc (servtab_t *sep)
399 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
400 if (!pmap_unset (sep->se_rpcprog, n))
401 syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
404 #endif /* CONFIG_FEATURE_INETD_RPC */
406 static void freeconfig (servtab_t *cp)
410 free (cp->se_hostaddr);
411 free (cp->se_service);
415 free (cp->se_server);
416 for (i = 0; i < MAXARGV; i++)
418 free (cp->se_argv[i]);
421 static int bump_nofile (void)
427 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
428 syslog (LOG_ERR, "getrlimit: %m");
431 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
432 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
433 if (rl.rlim_cur <= rlim_ofile_cur) {
434 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
439 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
440 syslog (LOG_ERR, "setrlimit: %m");
444 rlim_ofile_cur = rl.rlim_cur;
448 static void setup (servtab_t *sep)
453 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
454 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
457 #define turnon(fd, opt) \
458 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
459 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
460 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
463 #ifdef CONFIG_FEATURE_INETD_RPC
464 if (isrpcservice (sep)) {
468 * for RPC services, attempt to use a reserved port
469 * if they are going to be running as root.
471 * Also, zero out the port for all RPC services; let bind()
474 sep->se_ctrladdr_in.sin_port = 0;
475 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
476 pwd->pw_uid == 0 && uid == 0)
477 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
479 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
481 socklen_t len = sep->se_ctrladdr_size;
482 int saveerrno = errno;
484 /* update se_ctrladdr_in.sin_port */
485 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
492 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
494 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
495 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
504 if (sep->se_socktype == SOCK_STREAM)
505 listen (sep->se_fd, global_queuelen);
507 FD_SET (sep->se_fd, &allsock);
509 if (sep->se_fd > maxsock) {
510 maxsock = sep->se_fd;
511 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
516 static char *nextline (void)
521 if (fgets (line, sizeof (line), fd) == NULL)
523 cp = strchr (line, '\n');
529 static char *skip (char **cpp) /* int report; */
537 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
542 while (*cp == ' ' || *cp == '\t')
548 (void) ungetc (c, fconfig);
549 if (c == ' ' || c == '\t')
550 if ((cp = nextline ()))
557 while (*cp && *cp != ' ' && *cp != '\t')
561 /* if ((*cpp = cp) == NULL) */
568 static servtab_t *new_servtab(void)
572 sep = (servtab_t *) malloc (sizeof (servtab_t));
574 syslog (LOG_ERR, bb_msg_memory_exhausted);
580 static servtab_t *dupconfig (servtab_t *sep)
585 newtab = new_servtab();
586 memset (newtab, 0, sizeof (servtab_t));
587 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
588 newtab->se_socktype = sep->se_socktype;
589 newtab->se_family = sep->se_family;
590 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
591 #ifdef CONFIG_FEATURE_INETD_RPC
592 newtab->se_rpcprog = sep->se_rpcprog;
593 newtab->se_rpcversl = sep->se_rpcversl;
594 newtab->se_rpcversh = sep->se_rpcversh;
596 newtab->se_wait = sep->se_wait;
597 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
598 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
599 #ifdef INETD_FEATURE_ENABLED
600 newtab->se_bi = sep->se_bi;
602 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
604 for (argc = 0; argc <= MAXARGV; argc++)
605 newtab->se_argv[argc] = sep->se_argv[argc] ?
606 newstr (sep->se_argv[argc]) : NULL;
607 newtab->se_max = sep->se_max;
612 static servtab_t *getconfigent (void)
623 /* memset(sep, 0, sizeof *sep); */
625 /* freeconfig(sep); */
627 while ((cp = nextline ()) && *cp == '#');
633 memset ((char *) sep, 0, sizeof *sep);
640 /* Check for a host name. */
641 hostdelim = strrchr (arg, ':');
644 sep->se_hostaddr = newstr (arg);
647 * If the line is of the form `host:', then just change the
648 * default host for the following lines.
654 defhost = sep->se_hostaddr;
659 sep->se_hostaddr = newstr (defhost);
661 sep->se_service = newstr (arg);
664 if (strcmp (arg, "stream") == 0)
665 sep->se_socktype = SOCK_STREAM;
666 else if (strcmp (arg, "dgram") == 0)
667 sep->se_socktype = SOCK_DGRAM;
668 else if (strcmp (arg, "rdm") == 0)
669 sep->se_socktype = SOCK_RDM;
670 else if (strcmp (arg, "seqpacket") == 0)
671 sep->se_socktype = SOCK_SEQPACKET;
672 else if (strcmp (arg, "raw") == 0)
673 sep->se_socktype = SOCK_RAW;
675 sep->se_socktype = -1;
677 sep->se_proto = newstr (skip (&cp));
679 if (strcmp (sep->se_proto, "unix") == 0) {
680 sep->se_family = AF_UNIX;
682 sep->se_family = AF_INET;
683 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
684 #ifdef CONFIG_FEATURE_IPV6
685 sep->se_family = AF_INET6;
687 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
689 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
690 #ifdef CONFIG_FEATURE_INETD_RPC
694 p = strchr (sep->se_service, '/');
696 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
700 l = strtol (p, &ccp, 0);
701 if (ccp == p || l < 0 || l > INT_MAX) {
703 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
706 sep->se_rpcversl = sep->se_rpcversh = l;
709 l = strtol (p, &ccp, 0);
710 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
712 sep->se_rpcversh = l;
713 } else if (*ccp != '\0')
716 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
725 char *s = strchr (arg, '.');
728 sep->se_max = atoi (s);
730 sep->se_max = toomany;
732 sep->se_wait = strcmp (arg, "wait") == 0;
733 /* if ((arg = skip(&cp, 1)) == NULL) */
735 sep->se_user = newstr (skip (&cp));
736 arg = strchr (sep->se_user, '.');
738 arg = strchr (sep->se_user, ':');
741 sep->se_group = newstr (arg);
743 /* if ((arg = skip(&cp, 1)) == NULL) */
746 sep->se_server = newstr (skip (&cp));
747 if (strcmp (sep->se_server, "internal") == 0) {
748 #ifdef INETD_FEATURE_ENABLED
749 const struct biltin *bi;
751 for (bi = biltins; bi->bi_service; bi++)
752 if (bi->bi_socktype == sep->se_socktype &&
753 strcmp (bi->bi_service, sep->se_service) == 0)
755 if (bi->bi_service == 0) {
756 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
760 sep->se_wait = bi->bi_wait;
762 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
766 #ifdef INETD_FEATURE_ENABLED
771 for (arg = skip (&cp); cp; arg = skip (&cp)) {
773 sep->se_argv[argc++] = newstr (arg);
775 while (argc <= MAXARGV)
776 sep->se_argv[argc++] = NULL;
779 * Now that we've processed the entire line, check if the hostname
780 * specifier was a comma separated list of hostnames. If so
781 * we'll make new entries for each address.
783 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
784 nsep = dupconfig (sep);
787 * NULL terminate the hostname field of the existing entry,
788 * and make a dup for the new entry.
791 nsep->se_hostaddr = newstr (hostdelim);
793 nsep->se_next = sep->se_next;
798 while (nsep != NULL) {
799 nsep->se_checked = 1;
800 if (nsep->se_family == AF_INET) {
801 if (!strcmp (nsep->se_hostaddr, "*"))
802 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
803 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
806 hp = gethostbyname (nsep->se_hostaddr);
808 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
809 nsep->se_checked = 0;
811 } else if (hp->h_addrtype != AF_INET) {
813 "%s: address isn't an Internet "
814 "address", nsep->se_hostaddr);
815 nsep->se_checked = 0;
820 memmove (&nsep->se_ctrladdr_in.sin_addr,
821 hp->h_addr_list[0], sizeof (struct in_addr));
822 while (hp->h_addr_list[i] != NULL) {
823 psep = dupconfig (nsep);
824 psep->se_hostaddr = newstr (nsep->se_hostaddr);
825 psep->se_checked = 1;
826 memmove (&psep->se_ctrladdr_in.sin_addr,
827 hp->h_addr_list[i], sizeof (struct in_addr));
828 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
830 /* Prepend to list, don't want to look up its */
831 /* hostname again. */
838 /* XXX BUG?: is this skip: label supposed to remain? */
840 nsep = nsep->se_next;
844 * Finally, free any entries which failed the gethostbyname
849 while (nsep != NULL) {
852 if (nsep->se_checked == 0) {
858 nsep = nsep->se_next;
859 psep->se_next = nsep;
863 nsep->se_checked = 0;
865 nsep = nsep->se_next;
872 #define Block_Using_Signals(m) do { sigemptyset(&m); \
873 sigaddset(&m, SIGCHLD); \
874 sigaddset(&m, SIGHUP); \
875 sigaddset(&m, SIGALRM); \
876 sigprocmask(SIG_BLOCK, &m, NULL); \
880 static servtab_t *enter (servtab_t *cp)
888 #ifdef CONFIG_FEATURE_INETD_RPC
889 sep->se_rpcprog = -1;
891 Block_Using_Signals(omask);
892 sep->se_next = servtab;
894 sigprocmask(SIG_UNBLOCK, &omask, NULL);
898 static int matchconf (servtab_t *old, servtab_t *new)
900 if (strcmp (old->se_service, new->se_service) != 0)
903 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
906 if (strcmp (old->se_proto, new->se_proto) != 0)
910 * If the new servtab is bound to a specific address, check that the
911 * old servtab is bound to the same entry. If the new service is not
912 * bound to a specific address then the check of se_hostaddr above
916 if (old->se_family == AF_INET && new->se_family == AF_INET &&
917 memcmp (&old->se_ctrladdr_in.sin_addr,
918 &new->se_ctrladdr_in.sin_addr,
919 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
922 #ifdef CONFIG_FEATURE_IPV6
923 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
924 memcmp (&old->se_ctrladdr_in6.sin6_addr,
925 &new->se_ctrladdr_in6.sin6_addr,
926 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
932 static void config (int sig __attribute__((unused)))
934 servtab_t *sep, *cp, **sepp;
941 syslog (LOG_ERR, "%s: %m", CONFIG);
944 for (sep = servtab; sep; sep = sep->se_next)
946 cp = getconfigent ();
948 for (sep = servtab; sep; sep = sep->se_next)
949 if (matchconf (sep, cp))
955 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
957 Block_Using_Signals(omask);
959 * sep->se_wait may be holding the pid of a daemon
960 * that we're waiting for. If so, don't overwrite
961 * it unless the config file explicitly says don't
965 #ifdef INETD_FEATURE_ENABLED
968 (sep->se_wait == 1 || cp->se_wait == 0))
969 sep->se_wait = cp->se_wait;
970 SWAP (int, cp->se_max, sep->se_max);
971 SWAP (char *, sep->se_user, cp->se_user);
972 SWAP (char *, sep->se_group, cp->se_group);
973 SWAP (char *, sep->se_server, cp->se_server);
974 for (i = 0; i < MAXARGV; i++)
975 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
978 #ifdef CONFIG_FEATURE_INETD_RPC
979 if (isrpcservice (sep))
980 unregister_rpc (sep);
981 sep->se_rpcversl = cp->se_rpcversl;
982 sep->se_rpcversh = cp->se_rpcversh;
984 sigprocmask(SIG_UNBLOCK, &omask, NULL);
992 switch (sep->se_family) {
994 if (sep->se_fd != -1)
996 (void) unlink (sep->se_service);
997 n = strlen (sep->se_service);
998 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
999 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
1000 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
1001 sep->se_ctrladdr_un.sun_family = AF_UNIX;
1002 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1006 sep->se_ctrladdr_in.sin_family = AF_INET;
1007 /* se_ctrladdr_in was set in getconfigent */
1008 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1010 #ifdef CONFIG_FEATURE_INETD_RPC
1011 if (isrpcservice (sep)) {
1014 sep->se_rpcprog = atoi (sep->se_service);
1015 if (sep->se_rpcprog == 0) {
1016 rp = getrpcbyname (sep->se_service);
1018 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1021 sep->se_rpcprog = rp->r_number;
1023 if (sep->se_fd == -1)
1025 if (sep->se_fd != -1)
1030 u_short port = htons (atoi (sep->se_service));
1033 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1034 if (isdigit (protoname[strlen (protoname) - 1]))
1035 protoname[strlen (protoname) - 1] = '\0';
1036 sp = getservbyname (sep->se_service, protoname);
1039 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1044 if (port != sep->se_ctrladdr_in.sin_port) {
1045 sep->se_ctrladdr_in.sin_port = port;
1046 if (sep->se_fd != -1) {
1047 FD_CLR (sep->se_fd, &allsock);
1049 (void) close (sep->se_fd);
1053 if (sep->se_fd == -1)
1057 #ifdef CONFIG_FEATURE_IPV6
1059 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1060 /* se_ctrladdr_in was set in getconfigent */
1061 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1063 #ifdef CONFIG_FEATURE_INETD_RPC
1064 if (isrpcservice (sep)) {
1067 sep->se_rpcprog = atoi (sep->se_service);
1068 if (sep->se_rpcprog == 0) {
1069 rp = getrpcbyname (sep->se_service);
1071 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1074 sep->se_rpcprog = rp->r_number;
1076 if (sep->se_fd == -1)
1078 if (sep->se_fd != -1)
1083 u_short port = htons (atoi (sep->se_service));
1086 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1087 if (isdigit (protoname[strlen (protoname) - 1]))
1088 protoname[strlen (protoname) - 1] = '\0';
1089 sp = getservbyname (sep->se_service, protoname);
1092 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1097 if (port != sep->se_ctrladdr_in6.sin6_port) {
1098 sep->se_ctrladdr_in6.sin6_port = port;
1099 if (sep->se_fd != -1) {
1100 FD_CLR (sep->se_fd, &allsock);
1102 (void) close (sep->se_fd);
1106 if (sep->se_fd == -1)
1110 #endif /* CONFIG_FEATURE_IPV6 */
1113 if (cp->se_next != NULL) {
1114 servtab_t *tmp = cp;
1120 cp = getconfigent ();
1125 * Purge anything not looked at above.
1127 Block_Using_Signals(omask);
1129 while ((sep = *sepp)) {
1130 if (sep->se_checked) {
1131 sepp = &sep->se_next;
1134 *sepp = sep->se_next;
1135 if (sep->se_fd != -1) {
1136 FD_CLR (sep->se_fd, &allsock);
1138 (void) close (sep->se_fd);
1140 #ifdef CONFIG_FEATURE_INETD_RPC
1141 if (isrpcservice (sep))
1142 unregister_rpc (sep);
1144 if (sep->se_family == AF_UNIX)
1145 (void) unlink (sep->se_service);
1149 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1153 static void reapchild (int sig __attribute__((unused)))
1156 int save_errno = errno, status;
1160 pid = wait3 (&status, WNOHANG, NULL);
1163 for (sep = servtab; sep; sep = sep->se_next)
1164 if (sep->se_wait == pid) {
1165 if (WIFEXITED (status) && WEXITSTATUS (status))
1166 syslog (LOG_WARNING,
1167 "%s: exit status 0x%x",
1168 sep->se_server, WEXITSTATUS (status));
1169 else if (WIFSIGNALED (status))
1170 syslog (LOG_WARNING,
1171 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1173 FD_SET (sep->se_fd, &allsock);
1180 static void retry (int sig __attribute__((unused)))
1185 for (sep = servtab; sep; sep = sep->se_next) {
1186 if (sep->se_fd == -1) {
1187 switch (sep->se_family) {
1190 #ifdef CONFIG_FEATURE_IPV6
1194 #ifdef CONFIG_FEATURE_INETD_RPC
1195 if (sep->se_fd != -1 && isrpcservice (sep))
1204 static void goaway (int sig __attribute__((unused)))
1208 /* XXX signal race walking sep list */
1209 for (sep = servtab; sep; sep = sep->se_next) {
1210 if (sep->se_fd == -1)
1213 switch (sep->se_family) {
1215 (void) unlink (sep->se_service);
1218 #ifdef CONFIG_FEATURE_IPV6
1221 #ifdef CONFIG_FEATURE_INETD_RPC
1222 if (sep->se_wait == 1 && isrpcservice (sep))
1223 unregister_rpc (sep); /* XXX signal race */
1227 (void) close (sep->se_fd);
1229 (void) unlink (_PATH_INETDPID);
1234 #ifdef INETD_SETPROCTITLE
1236 static char *LastArg;
1239 inetd_setproctitle (char *a, int s)
1243 struct sockaddr_in prt_sin;
1247 size = sizeof (prt_sin);
1248 (void) snprintf (buf, sizeof buf, "-%s", a);
1249 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1250 char *sa = inet_ntoa (prt_sin.sin_addr);
1252 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1257 strncpy (cp, buf, LastArg - cp);
1259 while (cp < LastArg)
1266 inetd_main (int argc, char *argv[])
1270 struct group *grp = NULL;
1272 struct sigaction sa, sapipe;
1279 #ifdef INETD_SETPROCTITLE
1280 extern char **environ;
1281 char **envp = environ;
1284 if (envp == 0 || *envp == 0)
1288 LastArg = envp[-1] + strlen (envp[-1]);
1291 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1293 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1297 toomany = strtoul (stoomany, &e, 0);
1298 if (!(toomany >= 0 && *e == '\0')) {
1300 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1312 bb_error_msg_and_die ("non-root must specify a config file");
1315 #if defined(__uClinux__)
1316 /* reexec for vfork() do continue parent */
1317 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1320 #endif /* uClinux */
1326 gid_t gid = getgid ();
1328 /* If run by hand, ensure groups vector gets trashed */
1329 setgroups (1, &gid);
1335 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1336 fprintf (fp, "%u\n", getpid ());
1341 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1342 syslog (LOG_ERR, "getrlimit: %m");
1344 rlim_ofile_cur = rlim_ofile.rlim_cur;
1345 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1346 rlim_ofile_cur = OPEN_MAX;
1349 memset ((char *) &sa, 0, sizeof (sa));
1350 sigemptyset (&sa.sa_mask);
1351 sigaddset (&sa.sa_mask, SIGALRM);
1352 sigaddset (&sa.sa_mask, SIGCHLD);
1353 sigaddset (&sa.sa_mask, SIGHUP);
1354 sa.sa_handler = retry;
1355 sigaction (SIGALRM, &sa, NULL);
1358 sa.sa_handler = config;
1359 sigaction (SIGHUP, &sa, NULL);
1360 sa.sa_handler = reapchild;
1361 sigaction (SIGCHLD, &sa, NULL);
1362 sa.sa_handler = goaway;
1363 sigaction (SIGTERM, &sa, NULL);
1364 sa.sa_handler = goaway;
1365 sigaction (SIGINT, &sa, NULL);
1366 sa.sa_handler = SIG_IGN;
1367 sigaction (SIGPIPE, &sa, &sapipe);
1370 /* space for daemons to overwrite environment for ps */
1371 #define DUMMYSIZE 100
1372 char dummy[DUMMYSIZE];
1374 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1375 dummy[DUMMYSIZE - 1] = '\0';
1377 (void) setenv ("inetd_dummy", dummy, 1);
1385 Block_Using_Signals(omask);
1388 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1392 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1393 if (n < 0 && errno != EINTR) {
1394 syslog (LOG_WARNING, "select: %m");
1399 for (sep = servtab; n && sep; sep = sep->se_next)
1400 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1402 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1403 ctrl = accept (sep->se_fd, NULL, NULL);
1407 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1410 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1411 struct sockaddr_in peer;
1412 socklen_t plen = sizeof (peer);
1414 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1415 syslog (LOG_WARNING, "could not getpeername");
1419 if (ntohs (peer.sin_port) == 20) {
1420 /* XXX ftp bounce */
1427 Block_Using_Signals(omask);
1429 #ifdef INETD_FEATURE_ENABLED
1430 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1433 if (sep->se_count++ == 0)
1434 (void) gettimeofday (&sep->se_time, NULL);
1435 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1438 (void) gettimeofday (&now, NULL);
1439 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1443 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1445 if (sep->se_family == AF_INET &&
1446 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1448 * Cannot close it -- there are
1449 * thieves on the system.
1450 * Simply ignore the connection.
1456 "%s/%s server failing (looping), service terminated",
1457 sep->se_service, sep->se_proto);
1458 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1460 FD_CLR (sep->se_fd, &allsock);
1461 (void) close (sep->se_fd);
1465 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1476 syslog (LOG_ERR, "fork: %m");
1477 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1479 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1483 if (pid && sep->se_wait) {
1485 FD_CLR (sep->se_fd, &allsock);
1488 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1490 #ifdef INETD_FEATURE_ENABLED
1492 (*sep->se_bi->bi_fn) (ctrl, sep);
1496 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1497 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1498 if (sep->se_socktype != SOCK_STREAM)
1499 recv (0, buf, sizeof (buf), 0);
1503 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1504 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1505 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1506 if (sep->se_socktype != SOCK_STREAM)
1507 recv (0, buf, sizeof (buf), 0);
1511 /* a user running private inetd */
1512 if (uid != pwd->pw_uid)
1514 } else if (pwd->pw_uid) {
1515 if (sep->se_group) {
1516 pwd->pw_gid = grp->gr_gid;
1518 setgid ((gid_t) pwd->pw_gid);
1519 initgroups (pwd->pw_name, pwd->pw_gid);
1520 setuid ((uid_t) pwd->pw_uid);
1521 } else if (sep->se_group) {
1522 setgid (grp->gr_gid);
1523 setgroups (1, &grp->gr_gid);
1529 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1530 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1531 syslog (LOG_ERR, "setrlimit: %m");
1533 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1534 (void) close (tmpint);
1535 sigaction (SIGPIPE, &sapipe, NULL);
1536 execv (sep->se_server, sep->se_argv);
1537 if (sep->se_socktype != SOCK_STREAM)
1538 recv (0, buf, sizeof (buf), 0);
1539 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1543 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1550 * Internet services provided internally by inetd:
1552 #define BUFSIZE 4096
1554 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO) || \
1555 defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN) || \
1556 defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME)
1557 static int dg_badinput (struct sockaddr_in *dg_sin)
1559 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1561 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1563 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1568 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
1569 /* Echo service -- echo data back */
1572 echo_stream (int s, servtab_t *sep)
1574 char buffer[BUFSIZE];
1577 inetd_setproctitle (sep->se_service, s);
1578 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1579 write (s, buffer, i) > 0);
1583 /* Echo service -- echo data back */
1586 echo_dg (int s, servtab_t *sep __attribute__((unused)))
1588 char buffer[BUFSIZE];
1591 /* struct sockaddr_storage ss; */
1595 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1597 if (dg_badinput ((struct sockaddr_in *) &sa))
1599 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1601 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO */
1603 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
1604 /* Discard service -- ignore data */
1607 discard_stream (int s, servtab_t *sep)
1609 char buffer[BUFSIZE];
1611 inetd_setproctitle (sep->se_service, s);
1612 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1617 /* Discard service -- ignore data */
1620 discard_dg (int s, servtab_t *sep __attribute__((unused)))
1622 char buffer[BUFSIZE];
1624 (void) read (s, buffer, sizeof (buffer));
1626 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD */
1629 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
1631 static char ring[128];
1632 static char *endring;
1641 for (i = 0; i <= 128; ++i)
1646 /* Character generator */
1649 chargen_stream (int s, servtab_t *sep)
1653 char text[LINESIZ + 2];
1655 inetd_setproctitle (sep->se_service, s);
1662 text[LINESIZ] = '\r';
1663 text[LINESIZ + 1] = '\n';
1665 if ((len = endring - rs) >= LINESIZ)
1666 memmove (text, rs, LINESIZ);
1668 memmove (text, rs, len);
1669 memmove (text + len, ring, LINESIZ - len);
1671 if (++rs == endring)
1673 if (write (s, text, sizeof (text)) != sizeof (text))
1679 /* Character generator */
1682 chargen_dg (int s, servtab_t *sep __attribute__((unused)))
1684 /* struct sockaddr_storage ss; */
1688 char text[LINESIZ + 2];
1697 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1699 if (dg_badinput ((struct sockaddr_in *) &sa))
1702 if ((len = endring - rs) >= LINESIZ)
1703 memmove (text, rs, LINESIZ);
1705 memmove (text, rs, len);
1706 memmove (text + len, ring, LINESIZ - len);
1708 if (++rs == endring)
1710 text[LINESIZ] = '\r';
1711 text[LINESIZ + 1] = '\n';
1712 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1714 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN */
1717 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
1719 * Return a machine readable date and time, in the form of the
1720 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1721 * returns the number of seconds since midnight, Jan 1, 1970,
1722 * we must add 2208988800 seconds to this figure to make up for
1723 * some seventy years Bell Labs was asleep.
1726 static u_int machtime (void)
1730 if (gettimeofday (&tv, NULL) < 0) {
1731 fprintf (stderr, "Unable to get time of day\n");
1734 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1739 machtime_stream (int s, servtab_t *sep __attribute__((unused)))
1743 result = machtime ();
1744 (void) write (s, (char *) &result, sizeof (result));
1749 machtime_dg (int s, servtab_t *sep __attribute__((unused)))
1752 /* struct sockaddr_storage ss; */
1754 struct sockaddr_in *dg_sin;
1758 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1760 /* if (dg_badinput((struct sockaddr *)&ss)) */
1761 dg_sin = (struct sockaddr_in *) &sa;
1762 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1763 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1765 result = machtime ();
1766 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1768 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME */
1771 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
1772 /* Return human-readable time of day */
1774 static void daytime_stream (int s, servtab_t *sep __attribute__((unused)))
1781 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1782 (void) write (s, buffer, strlen (buffer));
1785 /* Return human-readable time of day */
1788 daytime_dg (int s, servtab_t *sep __attribute__((unused)))
1792 /* struct sockaddr_storage ss; */
1796 t = time ((time_t *) 0);
1799 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1801 if (dg_badinput ((struct sockaddr_in *) &sa))
1803 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1804 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1806 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME */