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>
170 #define _PATH_INETDCONF "/etc/inetd.conf"
171 #define _PATH_INETDPID "/var/run/inetd.pid"
174 #define TOOMANY 0 /* don't start more than TOOMANY */
176 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
177 #define RETRYTIME (60*10) /* retry after bind or server fail */
179 #ifndef RLIMIT_NOFILE
180 #define RLIMIT_NOFILE RLIMIT_OFILE
187 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
188 #define FD_MARGIN (8)
189 static rlim_t rlim_ofile_cur = OPEN_MAX;
190 static struct rlimit rlim_ofile;
193 /* Check unsupporting builtin */
194 #if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
195 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD || \
196 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME || \
197 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME || \
198 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
199 # define INETD_FEATURE_ENABLED
202 #if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
203 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD || \
204 defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
205 # define INETD_SETPROCTITLE
208 typedef struct servtab
210 char *se_hostaddr; /* host address to listen on */
211 char *se_service; /* name of service */
212 int se_socktype; /* type of socket to use */
213 int se_family; /* address family */
214 char *se_proto; /* protocol used */
215 #ifdef CONFIG_FEATURE_INETD_RPC
216 int se_rpcprog; /* rpc program number */
217 int se_rpcversl; /* rpc program lowest version */
218 int se_rpcversh; /* rpc program highest version */
219 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
221 #define isrpcservice(sep) 0
223 pid_t se_wait; /* single threaded server */
224 short se_checked; /* looked at during merge */
225 char *se_user; /* user name to run as */
226 char *se_group; /* group name to run as */
227 #ifdef INETD_FEATURE_ENABLED
228 const struct biltin *se_bi; /* if built-in, description */
230 char *se_server; /* server program */
232 char *se_argv[MAXARGV + 1]; /* program arguments */
233 int se_fd; /* open descriptor */
236 struct sockaddr se_un_ctrladdr;
237 struct sockaddr_in se_un_ctrladdr_in;
238 #ifdef CONFIG_FEATURE_IPV6
239 struct sockaddr_in6 se_un_ctrladdr_in6;
241 struct sockaddr_un se_un_ctrladdr_un;
242 } se_un; /* bound address */
243 #define se_ctrladdr se_un.se_un_ctrladdr
244 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
245 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
246 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
247 int se_ctrladdr_size;
248 int se_max; /* max # of instances of this service */
249 int se_count; /* number started since se_time */
250 struct timeval se_time; /* start of se_count */
251 struct servtab *se_next;
254 static servtab_t *servtab;
256 #ifdef INETD_FEATURE_ENABLED
259 const char *bi_service; /* internally provided service name */
260 int bi_socktype; /* type of socket supported */
261 short bi_fork; /* 1 if should fork before call */
262 short bi_wait; /* 1 if should wait for child */
263 void (*bi_fn) (int, servtab_t *);
266 /* Echo received data */
267 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
268 static void echo_stream (int, servtab_t *);
269 static void echo_dg (int, servtab_t *);
271 /* Internet /dev/null */
272 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
273 static void discard_stream (int, servtab_t *);
274 static void discard_dg (int, servtab_t *);
276 /* Return 32 bit time since 1900 */
277 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
278 static void machtime_stream (int, servtab_t *);
279 static void machtime_dg (int, servtab_t *);
281 /* Return human-readable time */
282 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
283 static void daytime_stream (int, servtab_t *);
284 static void daytime_dg (int, servtab_t *);
286 /* Familiar character generator */
287 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
288 static void chargen_stream (int, servtab_t *);
289 static void chargen_dg (int, servtab_t *);
292 static const struct biltin biltins[] = {
293 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
294 /* Echo received data */
295 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
296 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
298 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
299 /* Internet /dev/null */
300 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
301 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
303 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
304 /* Return 32 bit time since 1900 */
305 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
306 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
308 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
309 /* Return human-readable time */
310 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
311 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
313 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
314 /* Familiar character generator */
315 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
316 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
318 {NULL, 0, 0, 0, NULL}
320 #endif /* INETD_FEATURE_ENABLED */
322 static int global_queuelen = 128;
323 static int nsock, maxsock;
324 static fd_set allsock;
325 static int toomany = TOOMANY;
326 static int timingout;
327 static struct servent *sp;
330 static char *CONFIG = _PATH_INETDCONF;
332 static FILE *fconfig;
333 static char line[1024];
334 static char *defhost;
336 static char *newstr (char *cp)
338 if ((cp = strdup (cp ? cp : "")))
340 syslog (LOG_ERR, "strdup: %m");
344 static int setconfig (void)
347 defhost = newstr ("*");
348 if (fconfig != NULL) {
349 fseek (fconfig, 0L, SEEK_SET);
352 fconfig = fopen (CONFIG, "r");
353 return (fconfig != NULL);
356 static void endconfig (void)
359 (void) fclose (fconfig);
366 #ifdef CONFIG_FEATURE_INETD_RPC
367 static void register_rpc (servtab_t *sep)
370 struct sockaddr_in ir_sin;
374 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
375 syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
378 size = sizeof ir_sin;
379 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
380 syslog (LOG_ERR, "%s/%s: getsockname: %m",
381 sep->se_service, sep->se_proto);
385 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
386 (void) pmap_unset (sep->se_rpcprog, n);
387 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
388 syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
389 sep->se_service, sep->se_proto,
390 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
394 static void unregister_rpc (servtab_t *sep)
398 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
399 if (!pmap_unset (sep->se_rpcprog, n))
400 syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
403 #endif /* CONFIG_FEATURE_INETD_RPC */
405 static void freeconfig (servtab_t *cp)
409 free (cp->se_hostaddr);
410 free (cp->se_service);
414 free (cp->se_server);
415 for (i = 0; i < MAXARGV; i++)
417 free (cp->se_argv[i]);
420 static int bump_nofile (void)
426 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
427 syslog (LOG_ERR, "getrlimit: %m");
430 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
431 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
432 if (rl.rlim_cur <= rlim_ofile_cur) {
433 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
438 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
439 syslog (LOG_ERR, "setrlimit: %m");
443 rlim_ofile_cur = rl.rlim_cur;
447 static void setup (servtab_t *sep)
452 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
453 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
456 #define turnon(fd, opt) \
457 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
458 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
459 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
462 #ifdef CONFIG_FEATURE_INETD_RPC
463 if (isrpcservice (sep)) {
467 * for RPC services, attempt to use a reserved port
468 * if they are going to be running as root.
470 * Also, zero out the port for all RPC services; let bind()
473 sep->se_ctrladdr_in.sin_port = 0;
474 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
475 pwd->pw_uid == 0 && uid == 0)
476 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
478 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
480 socklen_t len = sep->se_ctrladdr_size;
481 int saveerrno = errno;
483 /* update se_ctrladdr_in.sin_port */
484 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
491 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
493 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
494 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
503 if (sep->se_socktype == SOCK_STREAM)
504 listen (sep->se_fd, global_queuelen);
506 FD_SET (sep->se_fd, &allsock);
508 if (sep->se_fd > maxsock) {
509 maxsock = sep->se_fd;
510 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
515 static char *nextline (void)
520 if (fgets (line, sizeof (line), fd) == NULL)
522 cp = strchr (line, '\n');
528 static char *skip (char **cpp) /* int report; */
536 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
541 while (*cp == ' ' || *cp == '\t')
547 (void) ungetc (c, fconfig);
548 if (c == ' ' || c == '\t')
549 if ((cp = nextline ()))
556 while (*cp && *cp != ' ' && *cp != '\t')
560 /* if ((*cpp = cp) == NULL) */
567 static servtab_t *new_servtab(void)
571 sep = (servtab_t *) malloc (sizeof (servtab_t));
573 syslog (LOG_ERR, bb_msg_memory_exhausted);
579 static servtab_t *dupconfig (servtab_t *sep)
584 newtab = new_servtab();
585 memset (newtab, 0, sizeof (servtab_t));
586 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
587 newtab->se_socktype = sep->se_socktype;
588 newtab->se_family = sep->se_family;
589 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
590 #ifdef CONFIG_FEATURE_INETD_RPC
591 newtab->se_rpcprog = sep->se_rpcprog;
592 newtab->se_rpcversl = sep->se_rpcversl;
593 newtab->se_rpcversh = sep->se_rpcversh;
595 newtab->se_wait = sep->se_wait;
596 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
597 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
598 #ifdef INETD_FEATURE_ENABLED
599 newtab->se_bi = sep->se_bi;
601 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
603 for (argc = 0; argc <= MAXARGV; argc++)
604 newtab->se_argv[argc] = sep->se_argv[argc] ?
605 newstr (sep->se_argv[argc]) : NULL;
606 newtab->se_max = sep->se_max;
611 static servtab_t *getconfigent (void)
622 /* memset(sep, 0, sizeof *sep); */
624 /* freeconfig(sep); */
626 while ((cp = nextline ()) && *cp == '#');
632 memset ((char *) sep, 0, sizeof *sep);
639 /* Check for a host name. */
640 hostdelim = strrchr (arg, ':');
643 sep->se_hostaddr = newstr (arg);
646 * If the line is of the form `host:', then just change the
647 * default host for the following lines.
653 defhost = sep->se_hostaddr;
658 sep->se_hostaddr = newstr (defhost);
660 sep->se_service = newstr (arg);
663 if (strcmp (arg, "stream") == 0)
664 sep->se_socktype = SOCK_STREAM;
665 else if (strcmp (arg, "dgram") == 0)
666 sep->se_socktype = SOCK_DGRAM;
667 else if (strcmp (arg, "rdm") == 0)
668 sep->se_socktype = SOCK_RDM;
669 else if (strcmp (arg, "seqpacket") == 0)
670 sep->se_socktype = SOCK_SEQPACKET;
671 else if (strcmp (arg, "raw") == 0)
672 sep->se_socktype = SOCK_RAW;
674 sep->se_socktype = -1;
676 sep->se_proto = newstr (skip (&cp));
678 if (strcmp (sep->se_proto, "unix") == 0) {
679 sep->se_family = AF_UNIX;
681 sep->se_family = AF_INET;
682 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
683 #ifdef CONFIG_FEATURE_IPV6
684 sep->se_family = AF_INET6;
686 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
688 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
689 #ifdef CONFIG_FEATURE_INETD_RPC
693 p = strchr (sep->se_service, '/');
695 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
699 l = strtol (p, &ccp, 0);
700 if (ccp == p || l < 0 || l > INT_MAX) {
702 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
705 sep->se_rpcversl = sep->se_rpcversh = l;
708 l = strtol (p, &ccp, 0);
709 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
711 sep->se_rpcversh = l;
712 } else if (*ccp != '\0')
715 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
724 char *s = strchr (arg, '.');
727 sep->se_max = atoi (s);
729 sep->se_max = toomany;
731 sep->se_wait = strcmp (arg, "wait") == 0;
732 /* if ((arg = skip(&cp, 1)) == NULL) */
734 sep->se_user = newstr (skip (&cp));
735 arg = strchr (sep->se_user, '.');
737 arg = strchr (sep->se_user, ':');
740 sep->se_group = newstr (arg);
742 /* if ((arg = skip(&cp, 1)) == NULL) */
745 sep->se_server = newstr (skip (&cp));
746 if (strcmp (sep->se_server, "internal") == 0) {
747 #ifdef INETD_FEATURE_ENABLED
748 const struct biltin *bi;
750 for (bi = biltins; bi->bi_service; bi++)
751 if (bi->bi_socktype == sep->se_socktype &&
752 strcmp (bi->bi_service, sep->se_service) == 0)
754 if (bi->bi_service == 0) {
755 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
759 sep->se_wait = bi->bi_wait;
761 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
765 #ifdef INETD_FEATURE_ENABLED
770 for (arg = skip (&cp); cp; arg = skip (&cp)) {
772 sep->se_argv[argc++] = newstr (arg);
774 while (argc <= MAXARGV)
775 sep->se_argv[argc++] = NULL;
778 * Now that we've processed the entire line, check if the hostname
779 * specifier was a comma separated list of hostnames. If so
780 * we'll make new entries for each address.
782 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
783 nsep = dupconfig (sep);
786 * NULL terminate the hostname field of the existing entry,
787 * and make a dup for the new entry.
790 nsep->se_hostaddr = newstr (hostdelim);
792 nsep->se_next = sep->se_next;
797 while (nsep != NULL) {
798 nsep->se_checked = 1;
799 if (nsep->se_family == AF_INET) {
800 if (!strcmp (nsep->se_hostaddr, "*"))
801 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
802 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
805 hp = gethostbyname (nsep->se_hostaddr);
807 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
808 nsep->se_checked = 0;
810 } else if (hp->h_addrtype != AF_INET) {
812 "%s: address isn't an Internet "
813 "address", nsep->se_hostaddr);
814 nsep->se_checked = 0;
819 memmove (&nsep->se_ctrladdr_in.sin_addr,
820 hp->h_addr_list[0], sizeof (struct in_addr));
821 while (hp->h_addr_list[i] != NULL) {
822 psep = dupconfig (nsep);
823 psep->se_hostaddr = newstr (nsep->se_hostaddr);
824 psep->se_checked = 1;
825 memmove (&psep->se_ctrladdr_in.sin_addr,
826 hp->h_addr_list[i], sizeof (struct in_addr));
827 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
829 /* Prepend to list, don't want to look up its */
830 /* hostname again. */
837 /* XXX BUG?: is this skip: label supposed to remain? */
839 nsep = nsep->se_next;
843 * Finally, free any entries which failed the gethostbyname
848 while (nsep != NULL) {
851 if (nsep->se_checked == 0) {
857 nsep = nsep->se_next;
858 psep->se_next = nsep;
862 nsep->se_checked = 0;
864 nsep = nsep->se_next;
871 #define Block_Using_Signals(m) do { sigemptyset(&m); \
872 sigaddset(&m, SIGCHLD); \
873 sigaddset(&m, SIGHUP); \
874 sigaddset(&m, SIGALRM); \
875 sigprocmask(SIG_BLOCK, &m, NULL); \
879 static servtab_t *enter (servtab_t *cp)
887 #ifdef CONFIG_FEATURE_INETD_RPC
888 sep->se_rpcprog = -1;
890 Block_Using_Signals(omask);
891 sep->se_next = servtab;
893 sigprocmask(SIG_UNBLOCK, &omask, NULL);
897 static int matchconf (servtab_t *old, servtab_t *new)
899 if (strcmp (old->se_service, new->se_service) != 0)
902 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
905 if (strcmp (old->se_proto, new->se_proto) != 0)
909 * If the new servtab is bound to a specific address, check that the
910 * old servtab is bound to the same entry. If the new service is not
911 * bound to a specific address then the check of se_hostaddr above
915 if (old->se_family == AF_INET && new->se_family == AF_INET &&
916 memcmp (&old->se_ctrladdr_in.sin_addr,
917 &new->se_ctrladdr_in.sin_addr,
918 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
921 #ifdef CONFIG_FEATURE_IPV6
922 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
923 memcmp (&old->se_ctrladdr_in6.sin6_addr,
924 &new->se_ctrladdr_in6.sin6_addr,
925 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
931 static void config (int sig ATTRIBUTE_UNUSED)
933 servtab_t *sep, *cp, **sepp;
940 syslog (LOG_ERR, "%s: %m", CONFIG);
943 for (sep = servtab; sep; sep = sep->se_next)
945 cp = getconfigent ();
947 for (sep = servtab; sep; sep = sep->se_next)
948 if (matchconf (sep, cp))
954 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
956 Block_Using_Signals(omask);
958 * sep->se_wait may be holding the pid of a daemon
959 * that we're waiting for. If so, don't overwrite
960 * it unless the config file explicitly says don't
964 #ifdef INETD_FEATURE_ENABLED
967 (sep->se_wait == 1 || cp->se_wait == 0))
968 sep->se_wait = cp->se_wait;
969 SWAP (int, cp->se_max, sep->se_max);
970 SWAP (char *, sep->se_user, cp->se_user);
971 SWAP (char *, sep->se_group, cp->se_group);
972 SWAP (char *, sep->se_server, cp->se_server);
973 for (i = 0; i < MAXARGV; i++)
974 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
977 #ifdef CONFIG_FEATURE_INETD_RPC
978 if (isrpcservice (sep))
979 unregister_rpc (sep);
980 sep->se_rpcversl = cp->se_rpcversl;
981 sep->se_rpcversh = cp->se_rpcversh;
983 sigprocmask(SIG_UNBLOCK, &omask, NULL);
991 switch (sep->se_family) {
993 if (sep->se_fd != -1)
995 (void) unlink (sep->se_service);
996 n = strlen (sep->se_service);
997 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
998 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
999 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
1000 sep->se_ctrladdr_un.sun_family = AF_UNIX;
1001 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1005 sep->se_ctrladdr_in.sin_family = AF_INET;
1006 /* se_ctrladdr_in was set in getconfigent */
1007 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1009 #ifdef CONFIG_FEATURE_INETD_RPC
1010 if (isrpcservice (sep)) {
1013 sep->se_rpcprog = atoi (sep->se_service);
1014 if (sep->se_rpcprog == 0) {
1015 rp = getrpcbyname (sep->se_service);
1017 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1020 sep->se_rpcprog = rp->r_number;
1022 if (sep->se_fd == -1)
1024 if (sep->se_fd != -1)
1029 u_short port = htons (atoi (sep->se_service));
1032 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1033 if (isdigit (protoname[strlen (protoname) - 1]))
1034 protoname[strlen (protoname) - 1] = '\0';
1035 sp = getservbyname (sep->se_service, protoname);
1038 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1043 if (port != sep->se_ctrladdr_in.sin_port) {
1044 sep->se_ctrladdr_in.sin_port = port;
1045 if (sep->se_fd != -1) {
1046 FD_CLR (sep->se_fd, &allsock);
1048 (void) close (sep->se_fd);
1052 if (sep->se_fd == -1)
1056 #ifdef CONFIG_FEATURE_IPV6
1058 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1059 /* se_ctrladdr_in was set in getconfigent */
1060 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1062 #ifdef CONFIG_FEATURE_INETD_RPC
1063 if (isrpcservice (sep)) {
1066 sep->se_rpcprog = atoi (sep->se_service);
1067 if (sep->se_rpcprog == 0) {
1068 rp = getrpcbyname (sep->se_service);
1070 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1073 sep->se_rpcprog = rp->r_number;
1075 if (sep->se_fd == -1)
1077 if (sep->se_fd != -1)
1082 u_short port = htons (atoi (sep->se_service));
1085 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1086 if (isdigit (protoname[strlen (protoname) - 1]))
1087 protoname[strlen (protoname) - 1] = '\0';
1088 sp = getservbyname (sep->se_service, protoname);
1091 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1096 if (port != sep->se_ctrladdr_in6.sin6_port) {
1097 sep->se_ctrladdr_in6.sin6_port = port;
1098 if (sep->se_fd != -1) {
1099 FD_CLR (sep->se_fd, &allsock);
1101 (void) close (sep->se_fd);
1105 if (sep->se_fd == -1)
1109 #endif /* CONFIG_FEATURE_IPV6 */
1112 if (cp->se_next != NULL) {
1113 servtab_t *tmp = cp;
1119 cp = getconfigent ();
1124 * Purge anything not looked at above.
1126 Block_Using_Signals(omask);
1128 while ((sep = *sepp)) {
1129 if (sep->se_checked) {
1130 sepp = &sep->se_next;
1133 *sepp = sep->se_next;
1134 if (sep->se_fd != -1) {
1135 FD_CLR (sep->se_fd, &allsock);
1137 (void) close (sep->se_fd);
1139 #ifdef CONFIG_FEATURE_INETD_RPC
1140 if (isrpcservice (sep))
1141 unregister_rpc (sep);
1143 if (sep->se_family == AF_UNIX)
1144 (void) unlink (sep->se_service);
1148 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1152 static void reapchild (int sig ATTRIBUTE_UNUSED)
1155 int save_errno = errno, status;
1159 pid = wait3 (&status, WNOHANG, NULL);
1162 for (sep = servtab; sep; sep = sep->se_next)
1163 if (sep->se_wait == pid) {
1164 if (WIFEXITED (status) && WEXITSTATUS (status))
1165 syslog (LOG_WARNING,
1166 "%s: exit status 0x%x",
1167 sep->se_server, WEXITSTATUS (status));
1168 else if (WIFSIGNALED (status))
1169 syslog (LOG_WARNING,
1170 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1172 FD_SET (sep->se_fd, &allsock);
1179 static void retry (int sig ATTRIBUTE_UNUSED)
1184 for (sep = servtab; sep; sep = sep->se_next) {
1185 if (sep->se_fd == -1) {
1186 switch (sep->se_family) {
1189 #ifdef CONFIG_FEATURE_IPV6
1193 #ifdef CONFIG_FEATURE_INETD_RPC
1194 if (sep->se_fd != -1 && isrpcservice (sep))
1203 static void goaway (int sig ATTRIBUTE_UNUSED)
1207 /* XXX signal race walking sep list */
1208 for (sep = servtab; sep; sep = sep->se_next) {
1209 if (sep->se_fd == -1)
1212 switch (sep->se_family) {
1214 (void) unlink (sep->se_service);
1217 #ifdef CONFIG_FEATURE_IPV6
1220 #ifdef CONFIG_FEATURE_INETD_RPC
1221 if (sep->se_wait == 1 && isrpcservice (sep))
1222 unregister_rpc (sep); /* XXX signal race */
1226 (void) close (sep->se_fd);
1228 (void) unlink (_PATH_INETDPID);
1233 #ifdef INETD_SETPROCTITLE
1235 static char *LastArg;
1238 inetd_setproctitle (char *a, int s)
1242 struct sockaddr_in prt_sin;
1246 size = sizeof (prt_sin);
1247 (void) snprintf (buf, sizeof buf, "-%s", a);
1248 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1249 char *sa = inet_ntoa (prt_sin.sin_addr);
1251 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1256 strncpy (cp, buf, LastArg - cp);
1258 while (cp < LastArg)
1265 inetd_main (int argc, char *argv[])
1269 struct group *grp = NULL;
1271 struct sigaction sa, sapipe;
1276 sigset_t omask, wait_mask;
1278 #ifdef INETD_SETPROCTITLE
1279 extern char **environ;
1280 char **envp = environ;
1283 if (envp == 0 || *envp == 0)
1287 LastArg = envp[-1] + strlen (envp[-1]);
1290 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1292 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1296 toomany = strtoul (stoomany, &e, 0);
1297 if (!(toomany >= 0 && *e == '\0')) {
1299 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1311 bb_error_msg_and_die ("non-root must specify a config file");
1314 #if defined(__uClinux__)
1315 /* reexec for vfork() do continue parent */
1316 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1319 #endif /* uClinux */
1325 gid_t gid = getgid ();
1327 /* If run by hand, ensure groups vector gets trashed */
1328 setgroups (1, &gid);
1334 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1335 fprintf (fp, "%u\n", getpid ());
1340 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1341 syslog (LOG_ERR, "getrlimit: %m");
1343 rlim_ofile_cur = rlim_ofile.rlim_cur;
1344 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1345 rlim_ofile_cur = OPEN_MAX;
1348 memset ((char *) &sa, 0, sizeof (sa));
1349 sigemptyset (&sa.sa_mask);
1350 sigaddset (&sa.sa_mask, SIGALRM);
1351 sigaddset (&sa.sa_mask, SIGCHLD);
1352 sigaddset (&sa.sa_mask, SIGHUP);
1353 sa.sa_handler = retry;
1354 sigaction (SIGALRM, &sa, NULL);
1357 sa.sa_handler = config;
1358 sigaction (SIGHUP, &sa, NULL);
1359 sa.sa_handler = reapchild;
1360 sigaction (SIGCHLD, &sa, NULL);
1361 sa.sa_handler = goaway;
1362 sigaction (SIGTERM, &sa, NULL);
1363 sa.sa_handler = goaway;
1364 sigaction (SIGINT, &sa, NULL);
1365 sa.sa_handler = SIG_IGN;
1366 sigaction (SIGPIPE, &sa, &sapipe);
1367 memset(&wait_mask, 0, sizeof(wait_mask));
1369 /* space for daemons to overwrite environment for ps */
1370 #define DUMMYSIZE 100
1371 char dummy[DUMMYSIZE];
1373 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1374 dummy[DUMMYSIZE - 1] = '\0';
1376 (void) setenv ("inetd_dummy", dummy, 1);
1384 Block_Using_Signals(omask);
1386 sigsuspend (&wait_mask);
1387 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1391 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1392 if (n < 0 && errno != EINTR) {
1393 syslog (LOG_WARNING, "select: %m");
1398 for (sep = servtab; n && sep; sep = sep->se_next)
1399 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1401 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1402 ctrl = accept (sep->se_fd, NULL, NULL);
1406 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1409 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1410 struct sockaddr_in peer;
1411 socklen_t plen = sizeof (peer);
1413 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1414 syslog (LOG_WARNING, "could not getpeername");
1418 if (ntohs (peer.sin_port) == 20) {
1419 /* XXX ftp bounce */
1426 Block_Using_Signals(omask);
1428 #ifdef INETD_FEATURE_ENABLED
1429 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1432 if (sep->se_count++ == 0)
1433 (void) gettimeofday (&sep->se_time, NULL);
1434 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1437 (void) gettimeofday (&now, NULL);
1438 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1442 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1444 if (sep->se_family == AF_INET &&
1445 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1447 * Cannot close it -- there are
1448 * thieves on the system.
1449 * Simply ignore the connection.
1455 "%s/%s server failing (looping), service terminated",
1456 sep->se_service, sep->se_proto);
1457 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1459 FD_CLR (sep->se_fd, &allsock);
1460 (void) close (sep->se_fd);
1464 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1475 syslog (LOG_ERR, "fork: %m");
1476 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1478 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1482 if (pid && sep->se_wait) {
1484 FD_CLR (sep->se_fd, &allsock);
1487 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1489 #ifdef INETD_FEATURE_ENABLED
1491 (*sep->se_bi->bi_fn) (ctrl, sep);
1495 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1496 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1497 if (sep->se_socktype != SOCK_STREAM)
1498 recv (0, buf, sizeof (buf), 0);
1502 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1503 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1504 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1505 if (sep->se_socktype != SOCK_STREAM)
1506 recv (0, buf, sizeof (buf), 0);
1510 /* a user running private inetd */
1511 if (uid != pwd->pw_uid)
1513 } else if (pwd->pw_uid) {
1514 if (sep->se_group) {
1515 pwd->pw_gid = grp->gr_gid;
1517 setgid ((gid_t) pwd->pw_gid);
1518 initgroups (pwd->pw_name, pwd->pw_gid);
1519 setuid ((uid_t) pwd->pw_uid);
1520 } else if (sep->se_group) {
1521 setgid (grp->gr_gid);
1522 setgroups (1, &grp->gr_gid);
1528 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1529 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1530 syslog (LOG_ERR, "setrlimit: %m");
1532 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1533 (void) close (tmpint);
1534 sigaction (SIGPIPE, &sapipe, NULL);
1535 execv (sep->se_server, sep->se_argv);
1536 if (sep->se_socktype != SOCK_STREAM)
1537 recv (0, buf, sizeof (buf), 0);
1538 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1542 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1549 * Internet services provided internally by inetd:
1551 #define BUFSIZE 4096
1553 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO) || \
1554 defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN) || \
1555 defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME)
1556 static int dg_badinput (struct sockaddr_in *dg_sin)
1558 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1560 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1562 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1567 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
1568 /* Echo service -- echo data back */
1571 echo_stream (int s, servtab_t *sep)
1573 char buffer[BUFSIZE];
1576 inetd_setproctitle (sep->se_service, s);
1577 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1578 write (s, buffer, i) > 0);
1582 /* Echo service -- echo data back */
1585 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1587 char buffer[BUFSIZE];
1590 /* struct sockaddr_storage ss; */
1594 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1596 if (dg_badinput ((struct sockaddr_in *) &sa))
1598 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1600 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO */
1602 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
1603 /* Discard service -- ignore data */
1606 discard_stream (int s, servtab_t *sep)
1608 char buffer[BUFSIZE];
1610 inetd_setproctitle (sep->se_service, s);
1611 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1616 /* Discard service -- ignore data */
1619 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1621 char buffer[BUFSIZE];
1623 (void) read (s, buffer, sizeof (buffer));
1625 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD */
1628 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
1630 static char ring[128];
1631 static char *endring;
1640 for (i = 0; i <= 128; ++i)
1645 /* Character generator */
1648 chargen_stream (int s, servtab_t *sep)
1652 char text[LINESIZ + 2];
1654 inetd_setproctitle (sep->se_service, s);
1661 text[LINESIZ] = '\r';
1662 text[LINESIZ + 1] = '\n';
1664 if ((len = endring - rs) >= LINESIZ)
1665 memmove (text, rs, LINESIZ);
1667 memmove (text, rs, len);
1668 memmove (text + len, ring, LINESIZ - len);
1670 if (++rs == endring)
1672 if (write (s, text, sizeof (text)) != sizeof (text))
1678 /* Character generator */
1681 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1683 /* struct sockaddr_storage ss; */
1687 char text[LINESIZ + 2];
1696 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1698 if (dg_badinput ((struct sockaddr_in *) &sa))
1701 if ((len = endring - rs) >= LINESIZ)
1702 memmove (text, rs, LINESIZ);
1704 memmove (text, rs, len);
1705 memmove (text + len, ring, LINESIZ - len);
1707 if (++rs == endring)
1709 text[LINESIZ] = '\r';
1710 text[LINESIZ + 1] = '\n';
1711 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1713 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN */
1716 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
1718 * Return a machine readable date and time, in the form of the
1719 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1720 * returns the number of seconds since midnight, Jan 1, 1970,
1721 * we must add 2208988800 seconds to this figure to make up for
1722 * some seventy years Bell Labs was asleep.
1725 static u_int machtime (void)
1729 if (gettimeofday (&tv, NULL) < 0) {
1730 fprintf (stderr, "Unable to get time of day\n");
1733 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1738 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1742 result = machtime ();
1743 (void) write (s, (char *) &result, sizeof (result));
1748 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1751 /* struct sockaddr_storage ss; */
1753 struct sockaddr_in *dg_sin;
1757 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1759 /* if (dg_badinput((struct sockaddr *)&ss)) */
1760 dg_sin = (struct sockaddr_in *) &sa;
1761 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1762 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1764 result = machtime ();
1765 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1767 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME */
1770 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
1771 /* Return human-readable time of day */
1773 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1780 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1781 (void) write (s, buffer, strlen (buffer));
1784 /* Return human-readable time of day */
1787 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1791 /* struct sockaddr_storage ss; */
1795 t = time ((time_t *) 0);
1798 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1800 if (dg_badinput ((struct sockaddr_in *) &sa))
1802 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1803 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1805 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME */