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_BUILTIN_ECHO
159 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
160 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
161 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
162 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_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_BUILTIN_ECHO || \
195 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
196 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
197 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
198 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
199 # define INETD_FEATURE_ENABLED
202 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
203 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
204 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_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 builtin *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_BUILTIN_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_BUILTIN_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_BUILTIN_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_BUILTIN_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_BUILTIN_CHARGEN
288 static void chargen_stream (int, servtab_t *);
289 static void chargen_dg (int, servtab_t *);
292 static const struct builtin builtins[] = {
293 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_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_BUILTIN_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_BUILTIN_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_BUILTIN_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_BUILTIN_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++)
416 free (cp->se_argv[i]);
419 static int bump_nofile (void)
425 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
426 syslog (LOG_ERR, "getrlimit: %m");
429 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
430 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
431 if (rl.rlim_cur <= rlim_ofile_cur) {
432 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
437 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
438 syslog (LOG_ERR, "setrlimit: %m");
442 rlim_ofile_cur = rl.rlim_cur;
446 static void setup (servtab_t *sep)
451 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
452 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
455 #define turnon(fd, opt) \
456 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
457 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
458 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
461 #ifdef CONFIG_FEATURE_INETD_RPC
462 if (isrpcservice (sep)) {
466 * for RPC services, attempt to use a reserved port
467 * if they are going to be running as root.
469 * Also, zero out the port for all RPC services; let bind()
472 sep->se_ctrladdr_in.sin_port = 0;
473 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
474 pwd->pw_uid == 0 && uid == 0)
475 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
477 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
479 socklen_t len = sep->se_ctrladdr_size;
480 int saveerrno = errno;
482 /* update se_ctrladdr_in.sin_port */
483 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
490 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
492 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
493 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
502 if (sep->se_socktype == SOCK_STREAM)
503 listen (sep->se_fd, global_queuelen);
505 FD_SET (sep->se_fd, &allsock);
507 if (sep->se_fd > maxsock) {
508 maxsock = sep->se_fd;
509 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
514 static char *nextline (void)
519 if (fgets (line, sizeof (line), fd) == NULL)
521 cp = strchr (line, '\n');
527 static char *skip (char **cpp) /* int report; */
535 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
540 while (*cp == ' ' || *cp == '\t')
546 (void) ungetc (c, fconfig);
547 if (c == ' ' || c == '\t')
548 if ((cp = nextline ()))
555 while (*cp && *cp != ' ' && *cp != '\t')
559 /* if ((*cpp = cp) == NULL) */
566 static servtab_t *new_servtab(void)
570 sep = (servtab_t *) malloc (sizeof (servtab_t));
572 syslog (LOG_ERR, bb_msg_memory_exhausted);
578 static servtab_t *dupconfig (servtab_t *sep)
583 newtab = new_servtab();
584 memset (newtab, 0, sizeof (servtab_t));
585 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
586 newtab->se_socktype = sep->se_socktype;
587 newtab->se_family = sep->se_family;
588 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
589 #ifdef CONFIG_FEATURE_INETD_RPC
590 newtab->se_rpcprog = sep->se_rpcprog;
591 newtab->se_rpcversl = sep->se_rpcversl;
592 newtab->se_rpcversh = sep->se_rpcversh;
594 newtab->se_wait = sep->se_wait;
595 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
596 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
597 #ifdef INETD_FEATURE_ENABLED
598 newtab->se_bi = sep->se_bi;
600 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
602 for (argc = 0; argc <= MAXARGV; argc++)
603 newtab->se_argv[argc] = sep->se_argv[argc] ?
604 newstr (sep->se_argv[argc]) : NULL;
605 newtab->se_max = sep->se_max;
610 static servtab_t *getconfigent (void)
621 /* memset(sep, 0, sizeof *sep); */
623 /* freeconfig(sep); */
625 while ((cp = nextline ()) && *cp == '#');
631 memset ((char *) sep, 0, sizeof *sep);
638 /* Check for a host name. */
639 hostdelim = strrchr (arg, ':');
642 sep->se_hostaddr = newstr (arg);
645 * If the line is of the form `host:', then just change the
646 * default host for the following lines.
652 defhost = sep->se_hostaddr;
657 sep->se_hostaddr = newstr (defhost);
659 sep->se_service = newstr (arg);
662 if (strcmp (arg, "stream") == 0)
663 sep->se_socktype = SOCK_STREAM;
664 else if (strcmp (arg, "dgram") == 0)
665 sep->se_socktype = SOCK_DGRAM;
666 else if (strcmp (arg, "rdm") == 0)
667 sep->se_socktype = SOCK_RDM;
668 else if (strcmp (arg, "seqpacket") == 0)
669 sep->se_socktype = SOCK_SEQPACKET;
670 else if (strcmp (arg, "raw") == 0)
671 sep->se_socktype = SOCK_RAW;
673 sep->se_socktype = -1;
675 sep->se_proto = newstr (skip (&cp));
677 if (strcmp (sep->se_proto, "unix") == 0) {
678 sep->se_family = AF_UNIX;
680 sep->se_family = AF_INET;
681 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
682 #ifdef CONFIG_FEATURE_IPV6
683 sep->se_family = AF_INET6;
685 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
687 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
688 #ifdef CONFIG_FEATURE_INETD_RPC
692 p = strchr (sep->se_service, '/');
694 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
698 l = strtol (p, &ccp, 0);
699 if (ccp == p || l < 0 || l > INT_MAX) {
701 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
704 sep->se_rpcversl = sep->se_rpcversh = l;
707 l = strtol (p, &ccp, 0);
708 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
710 sep->se_rpcversh = l;
711 } else if (*ccp != '\0')
714 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
723 char *s = strchr (arg, '.');
726 sep->se_max = atoi (s);
728 sep->se_max = toomany;
730 sep->se_wait = strcmp (arg, "wait") == 0;
731 /* if ((arg = skip(&cp, 1)) == NULL) */
733 sep->se_user = newstr (skip (&cp));
734 arg = strchr (sep->se_user, '.');
736 arg = strchr (sep->se_user, ':');
739 sep->se_group = newstr (arg);
741 /* if ((arg = skip(&cp, 1)) == NULL) */
744 sep->se_server = newstr (skip (&cp));
745 if (strcmp (sep->se_server, "internal") == 0) {
746 #ifdef INETD_FEATURE_ENABLED
747 const struct builtin *bi;
749 for (bi = builtins; bi->bi_service; bi++)
750 if (bi->bi_socktype == sep->se_socktype &&
751 strcmp (bi->bi_service, sep->se_service) == 0)
753 if (bi->bi_service == 0) {
754 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
758 sep->se_wait = bi->bi_wait;
760 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
764 #ifdef INETD_FEATURE_ENABLED
769 for (arg = skip (&cp); cp; arg = skip (&cp)) {
771 sep->se_argv[argc++] = newstr (arg);
773 while (argc <= MAXARGV)
774 sep->se_argv[argc++] = NULL;
777 * Now that we've processed the entire line, check if the hostname
778 * specifier was a comma separated list of hostnames. If so
779 * we'll make new entries for each address.
781 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
782 nsep = dupconfig (sep);
785 * NULL terminate the hostname field of the existing entry,
786 * and make a dup for the new entry.
789 nsep->se_hostaddr = newstr (hostdelim);
791 nsep->se_next = sep->se_next;
796 while (nsep != NULL) {
797 nsep->se_checked = 1;
798 if (nsep->se_family == AF_INET) {
799 if (!strcmp (nsep->se_hostaddr, "*"))
800 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
801 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
804 hp = gethostbyname (nsep->se_hostaddr);
806 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
807 nsep->se_checked = 0;
809 } else if (hp->h_addrtype != AF_INET) {
811 "%s: address isn't an Internet "
812 "address", nsep->se_hostaddr);
813 nsep->se_checked = 0;
818 memmove (&nsep->se_ctrladdr_in.sin_addr,
819 hp->h_addr_list[0], sizeof (struct in_addr));
820 while (hp->h_addr_list[i] != NULL) {
821 psep = dupconfig (nsep);
822 psep->se_hostaddr = newstr (nsep->se_hostaddr);
823 psep->se_checked = 1;
824 memmove (&psep->se_ctrladdr_in.sin_addr,
825 hp->h_addr_list[i], sizeof (struct in_addr));
826 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
828 /* Prepend to list, don't want to look up its */
829 /* hostname again. */
836 /* XXX BUG?: is this skip: label supposed to remain? */
838 nsep = nsep->se_next;
842 * Finally, free any entries which failed the gethostbyname
847 while (nsep != NULL) {
850 if (nsep->se_checked == 0) {
856 nsep = nsep->se_next;
857 psep->se_next = nsep;
861 nsep->se_checked = 0;
863 nsep = nsep->se_next;
870 #define Block_Using_Signals(m) do { sigemptyset(&m); \
871 sigaddset(&m, SIGCHLD); \
872 sigaddset(&m, SIGHUP); \
873 sigaddset(&m, SIGALRM); \
874 sigprocmask(SIG_BLOCK, &m, NULL); \
878 static servtab_t *enter (servtab_t *cp)
886 #ifdef CONFIG_FEATURE_INETD_RPC
887 sep->se_rpcprog = -1;
889 Block_Using_Signals(omask);
890 sep->se_next = servtab;
892 sigprocmask(SIG_UNBLOCK, &omask, NULL);
896 static int matchconf (servtab_t *old, servtab_t *new)
898 if (strcmp (old->se_service, new->se_service) != 0)
901 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
904 if (strcmp (old->se_proto, new->se_proto) != 0)
908 * If the new servtab is bound to a specific address, check that the
909 * old servtab is bound to the same entry. If the new service is not
910 * bound to a specific address then the check of se_hostaddr above
914 if (old->se_family == AF_INET && new->se_family == AF_INET &&
915 memcmp (&old->se_ctrladdr_in.sin_addr,
916 &new->se_ctrladdr_in.sin_addr,
917 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
920 #ifdef CONFIG_FEATURE_IPV6
921 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
922 memcmp (&old->se_ctrladdr_in6.sin6_addr,
923 &new->se_ctrladdr_in6.sin6_addr,
924 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
930 static void config (int sig ATTRIBUTE_UNUSED)
932 servtab_t *sep, *cp, **sepp;
939 syslog (LOG_ERR, "%s: %m", CONFIG);
942 for (sep = servtab; sep; sep = sep->se_next)
944 cp = getconfigent ();
946 for (sep = servtab; sep; sep = sep->se_next)
947 if (matchconf (sep, cp))
953 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
955 Block_Using_Signals(omask);
957 * sep->se_wait may be holding the pid of a daemon
958 * that we're waiting for. If so, don't overwrite
959 * it unless the config file explicitly says don't
963 #ifdef INETD_FEATURE_ENABLED
966 (sep->se_wait == 1 || cp->se_wait == 0))
967 sep->se_wait = cp->se_wait;
968 SWAP (int, cp->se_max, sep->se_max);
969 SWAP (char *, sep->se_user, cp->se_user);
970 SWAP (char *, sep->se_group, cp->se_group);
971 SWAP (char *, sep->se_server, cp->se_server);
972 for (i = 0; i < MAXARGV; i++)
973 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
976 #ifdef CONFIG_FEATURE_INETD_RPC
977 if (isrpcservice (sep))
978 unregister_rpc (sep);
979 sep->se_rpcversl = cp->se_rpcversl;
980 sep->se_rpcversh = cp->se_rpcversh;
982 sigprocmask(SIG_UNBLOCK, &omask, NULL);
990 switch (sep->se_family) {
992 if (sep->se_fd != -1)
994 (void) unlink (sep->se_service);
995 n = strlen (sep->se_service);
996 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
997 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
998 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
999 sep->se_ctrladdr_un.sun_family = AF_UNIX;
1000 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1004 sep->se_ctrladdr_in.sin_family = AF_INET;
1005 /* se_ctrladdr_in was set in getconfigent */
1006 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1008 #ifdef CONFIG_FEATURE_INETD_RPC
1009 if (isrpcservice (sep)) {
1012 sep->se_rpcprog = atoi (sep->se_service);
1013 if (sep->se_rpcprog == 0) {
1014 rp = getrpcbyname (sep->se_service);
1016 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1019 sep->se_rpcprog = rp->r_number;
1021 if (sep->se_fd == -1)
1023 if (sep->se_fd != -1)
1028 u_short port = htons (atoi (sep->se_service));
1031 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1032 if (isdigit (protoname[strlen (protoname) - 1]))
1033 protoname[strlen (protoname) - 1] = '\0';
1034 sp = getservbyname (sep->se_service, protoname);
1037 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1042 if (port != sep->se_ctrladdr_in.sin_port) {
1043 sep->se_ctrladdr_in.sin_port = port;
1044 if (sep->se_fd != -1) {
1045 FD_CLR (sep->se_fd, &allsock);
1047 (void) close (sep->se_fd);
1051 if (sep->se_fd == -1)
1055 #ifdef CONFIG_FEATURE_IPV6
1057 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1058 /* se_ctrladdr_in was set in getconfigent */
1059 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1061 #ifdef CONFIG_FEATURE_INETD_RPC
1062 if (isrpcservice (sep)) {
1065 sep->se_rpcprog = atoi (sep->se_service);
1066 if (sep->se_rpcprog == 0) {
1067 rp = getrpcbyname (sep->se_service);
1069 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1072 sep->se_rpcprog = rp->r_number;
1074 if (sep->se_fd == -1)
1076 if (sep->se_fd != -1)
1081 u_short port = htons (atoi (sep->se_service));
1084 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1085 if (isdigit (protoname[strlen (protoname) - 1]))
1086 protoname[strlen (protoname) - 1] = '\0';
1087 sp = getservbyname (sep->se_service, protoname);
1090 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1095 if (port != sep->se_ctrladdr_in6.sin6_port) {
1096 sep->se_ctrladdr_in6.sin6_port = port;
1097 if (sep->se_fd != -1) {
1098 FD_CLR (sep->se_fd, &allsock);
1100 (void) close (sep->se_fd);
1104 if (sep->se_fd == -1)
1108 #endif /* CONFIG_FEATURE_IPV6 */
1111 if (cp->se_next != NULL) {
1112 servtab_t *tmp = cp;
1118 cp = getconfigent ();
1123 * Purge anything not looked at above.
1125 Block_Using_Signals(omask);
1127 while ((sep = *sepp)) {
1128 if (sep->se_checked) {
1129 sepp = &sep->se_next;
1132 *sepp = sep->se_next;
1133 if (sep->se_fd != -1) {
1134 FD_CLR (sep->se_fd, &allsock);
1136 (void) close (sep->se_fd);
1138 #ifdef CONFIG_FEATURE_INETD_RPC
1139 if (isrpcservice (sep))
1140 unregister_rpc (sep);
1142 if (sep->se_family == AF_UNIX)
1143 (void) unlink (sep->se_service);
1147 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1151 static void reapchild (int sig ATTRIBUTE_UNUSED)
1154 int save_errno = errno, status;
1158 pid = wait3 (&status, WNOHANG, NULL);
1161 for (sep = servtab; sep; sep = sep->se_next)
1162 if (sep->se_wait == pid) {
1163 if (WIFEXITED (status) && WEXITSTATUS (status))
1164 syslog (LOG_WARNING,
1165 "%s: exit status 0x%x",
1166 sep->se_server, WEXITSTATUS (status));
1167 else if (WIFSIGNALED (status))
1168 syslog (LOG_WARNING,
1169 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1171 FD_SET (sep->se_fd, &allsock);
1178 static void retry (int sig ATTRIBUTE_UNUSED)
1183 for (sep = servtab; sep; sep = sep->se_next) {
1184 if (sep->se_fd == -1) {
1185 switch (sep->se_family) {
1188 #ifdef CONFIG_FEATURE_IPV6
1192 #ifdef CONFIG_FEATURE_INETD_RPC
1193 if (sep->se_fd != -1 && isrpcservice (sep))
1202 static void goaway (int sig ATTRIBUTE_UNUSED)
1206 /* XXX signal race walking sep list */
1207 for (sep = servtab; sep; sep = sep->se_next) {
1208 if (sep->se_fd == -1)
1211 switch (sep->se_family) {
1213 (void) unlink (sep->se_service);
1216 #ifdef CONFIG_FEATURE_IPV6
1219 #ifdef CONFIG_FEATURE_INETD_RPC
1220 if (sep->se_wait == 1 && isrpcservice (sep))
1221 unregister_rpc (sep); /* XXX signal race */
1225 (void) close (sep->se_fd);
1227 (void) unlink (_PATH_INETDPID);
1232 #ifdef INETD_SETPROCTITLE
1234 static char *LastArg;
1237 inetd_setproctitle (char *a, int s)
1241 struct sockaddr_in prt_sin;
1245 size = sizeof (prt_sin);
1246 (void) snprintf (buf, sizeof buf, "-%s", a);
1247 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1248 char *sa = inet_ntoa (prt_sin.sin_addr);
1250 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1255 strncpy (cp, buf, LastArg - cp);
1257 while (cp < LastArg)
1264 inetd_main (int argc, char *argv[])
1268 struct group *grp = NULL;
1270 struct sigaction sa, sapipe;
1275 sigset_t omask, wait_mask;
1277 #ifdef INETD_SETPROCTITLE
1278 extern char **environ;
1279 char **envp = environ;
1282 if (envp == 0 || *envp == 0)
1286 LastArg = envp[-1] + strlen (envp[-1]);
1289 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1291 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1295 toomany = strtoul (stoomany, &e, 0);
1296 if (!(toomany >= 0 && *e == '\0')) {
1298 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1310 bb_error_msg_and_die ("non-root must specify a config file");
1313 #if defined(__uClinux__)
1314 /* reexec for vfork() do continue parent */
1315 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1317 daemon (0, 0); /* bb_xdaemon? */
1318 #endif /* uClinux */
1324 gid_t gid = getgid ();
1326 /* If run by hand, ensure groups vector gets trashed */
1327 setgroups (1, &gid);
1333 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1334 fprintf (fp, "%u\n", getpid ());
1339 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1340 syslog (LOG_ERR, "getrlimit: %m");
1342 rlim_ofile_cur = rlim_ofile.rlim_cur;
1343 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1344 rlim_ofile_cur = OPEN_MAX;
1347 memset ((char *) &sa, 0, sizeof (sa));
1348 sigemptyset (&sa.sa_mask);
1349 sigaddset (&sa.sa_mask, SIGALRM);
1350 sigaddset (&sa.sa_mask, SIGCHLD);
1351 sigaddset (&sa.sa_mask, SIGHUP);
1352 sa.sa_handler = retry;
1353 sigaction (SIGALRM, &sa, NULL);
1356 sa.sa_handler = config;
1357 sigaction (SIGHUP, &sa, NULL);
1358 sa.sa_handler = reapchild;
1359 sigaction (SIGCHLD, &sa, NULL);
1360 sa.sa_handler = goaway;
1361 sigaction (SIGTERM, &sa, NULL);
1362 sa.sa_handler = goaway;
1363 sigaction (SIGINT, &sa, NULL);
1364 sa.sa_handler = SIG_IGN;
1365 sigaction (SIGPIPE, &sa, &sapipe);
1366 memset(&wait_mask, 0, sizeof(wait_mask));
1368 /* space for daemons to overwrite environment for ps */
1369 #define DUMMYSIZE 100
1370 char dummy[DUMMYSIZE];
1372 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1373 dummy[DUMMYSIZE - 1] = '\0';
1375 (void) setenv ("inetd_dummy", dummy, 1);
1383 Block_Using_Signals(omask);
1385 sigsuspend (&wait_mask);
1386 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1390 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1391 if (n < 0 && errno != EINTR) {
1392 syslog (LOG_WARNING, "select: %m");
1397 for (sep = servtab; n && sep; sep = sep->se_next)
1398 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1400 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1401 ctrl = accept (sep->se_fd, NULL, NULL);
1405 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1408 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1409 struct sockaddr_in peer;
1410 socklen_t plen = sizeof (peer);
1412 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1413 syslog (LOG_WARNING, "could not getpeername");
1417 if (ntohs (peer.sin_port) == 20) {
1418 /* XXX ftp bounce */
1425 Block_Using_Signals(omask);
1427 #ifdef INETD_FEATURE_ENABLED
1428 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1431 if (sep->se_count++ == 0)
1432 (void) gettimeofday (&sep->se_time, NULL);
1433 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1436 (void) gettimeofday (&now, NULL);
1437 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1441 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1443 if (sep->se_family == AF_INET &&
1444 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1446 * Cannot close it -- there are
1447 * thieves on the system.
1448 * Simply ignore the connection.
1454 "%s/%s server failing (looping), service terminated",
1455 sep->se_service, sep->se_proto);
1456 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1458 FD_CLR (sep->se_fd, &allsock);
1459 (void) close (sep->se_fd);
1463 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1474 syslog (LOG_ERR, "fork: %m");
1475 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1477 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1481 if (pid && sep->se_wait) {
1483 FD_CLR (sep->se_fd, &allsock);
1486 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1488 #ifdef INETD_FEATURE_ENABLED
1490 (*sep->se_bi->bi_fn) (ctrl, sep);
1494 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1495 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1496 if (sep->se_socktype != SOCK_STREAM)
1497 recv (0, buf, sizeof (buf), 0);
1501 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1502 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1503 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1504 if (sep->se_socktype != SOCK_STREAM)
1505 recv (0, buf, sizeof (buf), 0);
1509 /* a user running private inetd */
1510 if (uid != pwd->pw_uid)
1512 } else if (pwd->pw_uid) {
1513 if (sep->se_group) {
1514 pwd->pw_gid = grp->gr_gid;
1516 setgid ((gid_t) pwd->pw_gid);
1517 initgroups (pwd->pw_name, pwd->pw_gid);
1518 setuid ((uid_t) pwd->pw_uid);
1519 } else if (sep->se_group) {
1520 setgid (grp->gr_gid);
1521 setgroups (1, &grp->gr_gid);
1527 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1528 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1529 syslog (LOG_ERR, "setrlimit: %m");
1531 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1532 (void) close (tmpint);
1533 sigaction (SIGPIPE, &sapipe, NULL);
1534 execv (sep->se_server, sep->se_argv);
1535 if (sep->se_socktype != SOCK_STREAM)
1536 recv (0, buf, sizeof (buf), 0);
1537 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1541 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1548 * Internet services provided internally by inetd:
1550 #define BUFSIZE 4096
1552 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \
1553 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \
1554 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME)
1555 static int dg_badinput (struct sockaddr_in *dg_sin)
1557 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1559 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1561 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1566 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1567 /* Echo service -- echo data back */
1570 echo_stream (int s, servtab_t *sep)
1572 char buffer[BUFSIZE];
1575 inetd_setproctitle (sep->se_service, s);
1576 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1577 write (s, buffer, i) > 0);
1581 /* Echo service -- echo data back */
1584 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1586 char buffer[BUFSIZE];
1589 /* struct sockaddr_storage ss; */
1593 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1595 if (dg_badinput ((struct sockaddr_in *) &sa))
1597 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1599 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1601 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1602 /* Discard service -- ignore data */
1605 discard_stream (int s, servtab_t *sep)
1607 char buffer[BUFSIZE];
1609 inetd_setproctitle (sep->se_service, s);
1610 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1615 /* Discard service -- ignore data */
1618 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1620 char buffer[BUFSIZE];
1622 (void) read (s, buffer, sizeof (buffer));
1624 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1627 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1629 static char ring[128];
1630 static char *endring;
1639 for (i = 0; i <= 128; ++i)
1644 /* Character generator */
1647 chargen_stream (int s, servtab_t *sep)
1651 char text[LINESIZ + 2];
1653 inetd_setproctitle (sep->se_service, s);
1660 text[LINESIZ] = '\r';
1661 text[LINESIZ + 1] = '\n';
1663 if ((len = endring - rs) >= LINESIZ)
1664 memmove (text, rs, LINESIZ);
1666 memmove (text, rs, len);
1667 memmove (text + len, ring, LINESIZ - len);
1669 if (++rs == endring)
1671 if (write (s, text, sizeof (text)) != sizeof (text))
1677 /* Character generator */
1680 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1682 /* struct sockaddr_storage ss; */
1686 char text[LINESIZ + 2];
1695 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1697 if (dg_badinput ((struct sockaddr_in *) &sa))
1700 if ((len = endring - rs) >= LINESIZ)
1701 memmove (text, rs, LINESIZ);
1703 memmove (text, rs, len);
1704 memmove (text + len, ring, LINESIZ - len);
1706 if (++rs == endring)
1708 text[LINESIZ] = '\r';
1709 text[LINESIZ + 1] = '\n';
1710 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1712 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1715 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1717 * Return a machine readable date and time, in the form of the
1718 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1719 * returns the number of seconds since midnight, Jan 1, 1970,
1720 * we must add 2208988800 seconds to this figure to make up for
1721 * some seventy years Bell Labs was asleep.
1724 static u_int machtime (void)
1728 if (gettimeofday (&tv, NULL) < 0) {
1729 fprintf (stderr, "Unable to get time of day\n");
1732 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1737 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1741 result = machtime ();
1742 (void) write (s, (char *) &result, sizeof (result));
1747 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1750 /* struct sockaddr_storage ss; */
1752 struct sockaddr_in *dg_sin;
1756 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1758 /* if (dg_badinput((struct sockaddr *)&ss)) */
1759 dg_sin = (struct sockaddr_in *) &sa;
1760 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1761 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1763 result = machtime ();
1764 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1766 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1769 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1770 /* Return human-readable time of day */
1772 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1779 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1780 (void) write (s, buffer, strlen (buffer));
1783 /* Return human-readable time of day */
1786 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1790 /* struct sockaddr_storage ss; */
1794 t = time ((time_t *) 0);
1797 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1799 if (dg_badinput ((struct sockaddr_in *) &sa))
1801 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1802 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1804 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */
1805 /* vi: set sw=4 ts=4: */