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/resource.h>
140 #include <netinet/in.h>
141 #include <arpa/inet.h>
156 //#define CONFIG_FEATURE_INETD_RPC
157 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
158 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
159 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
160 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
161 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
162 //#define CONFIG_FEATURE_IPV6
164 #ifdef CONFIG_FEATURE_INETD_RPC
166 #include <rpc/pmap_clnt.h>
169 #define _PATH_INETDCONF "/etc/inetd.conf"
170 #define _PATH_INETDPID "/var/run/inetd.pid"
173 #define TOOMANY 0 /* don't start more than TOOMANY */
175 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
176 #define RETRYTIME (60*10) /* retry after bind or server fail */
178 #ifndef RLIMIT_NOFILE
179 #define RLIMIT_NOFILE RLIMIT_OFILE
186 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
187 #define FD_MARGIN (8)
188 static rlim_t rlim_ofile_cur = OPEN_MAX;
189 static struct rlimit rlim_ofile;
192 /* Check unsupporting builtin */
193 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
194 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
195 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
196 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
197 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
198 # define INETD_FEATURE_ENABLED
201 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
202 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
203 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
204 # define INETD_SETPROCTITLE
207 typedef struct servtab
209 char *se_hostaddr; /* host address to listen on */
210 char *se_service; /* name of service */
211 int se_socktype; /* type of socket to use */
212 int se_family; /* address family */
213 char *se_proto; /* protocol used */
214 #ifdef CONFIG_FEATURE_INETD_RPC
215 int se_rpcprog; /* rpc program number */
216 int se_rpcversl; /* rpc program lowest version */
217 int se_rpcversh; /* rpc program highest version */
218 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
220 #define isrpcservice(sep) 0
222 pid_t se_wait; /* single threaded server */
223 short se_checked; /* looked at during merge */
224 char *se_user; /* user name to run as */
225 char *se_group; /* group name to run as */
226 #ifdef INETD_FEATURE_ENABLED
227 const struct builtin *se_bi; /* if built-in, description */
229 char *se_server; /* server program */
231 char *se_argv[MAXARGV + 1]; /* program arguments */
232 int se_fd; /* open descriptor */
235 struct sockaddr se_un_ctrladdr;
236 struct sockaddr_in se_un_ctrladdr_in;
237 #ifdef CONFIG_FEATURE_IPV6
238 struct sockaddr_in6 se_un_ctrladdr_in6;
240 struct sockaddr_un se_un_ctrladdr_un;
241 } se_un; /* bound address */
242 #define se_ctrladdr se_un.se_un_ctrladdr
243 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
244 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
245 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
246 int se_ctrladdr_size;
247 int se_max; /* max # of instances of this service */
248 int se_count; /* number started since se_time */
249 struct timeval se_time; /* start of se_count */
250 struct servtab *se_next;
253 static servtab_t *servtab;
255 #ifdef INETD_FEATURE_ENABLED
258 const char *bi_service; /* internally provided service name */
259 int bi_socktype; /* type of socket supported */
260 short bi_fork; /* 1 if should fork before call */
261 short bi_wait; /* 1 if should wait for child */
262 void (*bi_fn) (int, servtab_t *);
265 /* Echo received data */
266 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
267 static void echo_stream (int, servtab_t *);
268 static void echo_dg (int, servtab_t *);
270 /* Internet /dev/null */
271 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
272 static void discard_stream (int, servtab_t *);
273 static void discard_dg (int, servtab_t *);
275 /* Return 32 bit time since 1900 */
276 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
277 static void machtime_stream (int, servtab_t *);
278 static void machtime_dg (int, servtab_t *);
280 /* Return human-readable time */
281 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
282 static void daytime_stream (int, servtab_t *);
283 static void daytime_dg (int, servtab_t *);
285 /* Familiar character generator */
286 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
287 static void chargen_stream (int, servtab_t *);
288 static void chargen_dg (int, servtab_t *);
291 static const struct builtin builtins[] = {
292 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
293 /* Echo received data */
294 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
295 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
297 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
298 /* Internet /dev/null */
299 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
300 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
302 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
303 /* Return 32 bit time since 1900 */
304 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
305 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
307 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
308 /* Return human-readable time */
309 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
310 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
312 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
313 /* Familiar character generator */
314 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
315 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
317 {NULL, 0, 0, 0, NULL}
319 #endif /* INETD_FEATURE_ENABLED */
321 static int global_queuelen = 128;
322 static int nsock, maxsock;
323 static fd_set allsock;
324 static int toomany = TOOMANY;
325 static int timingout;
326 static struct servent *sp;
329 static char *CONFIG = _PATH_INETDCONF;
331 static FILE *fconfig;
332 static char line[1024];
333 static char *defhost;
335 static char *newstr (char *cp)
337 if ((cp = strdup (cp ? cp : "")))
339 syslog (LOG_ERR, "strdup: %m");
343 static int setconfig (void)
346 defhost = newstr ("*");
347 if (fconfig != NULL) {
348 fseek (fconfig, 0L, SEEK_SET);
351 fconfig = fopen (CONFIG, "r");
352 return (fconfig != NULL);
355 static void endconfig (void)
358 (void) fclose (fconfig);
365 #ifdef CONFIG_FEATURE_INETD_RPC
366 static void register_rpc (servtab_t *sep)
369 struct sockaddr_in ir_sin;
373 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
374 syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
377 size = sizeof ir_sin;
378 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
379 syslog (LOG_ERR, "%s/%s: getsockname: %m",
380 sep->se_service, sep->se_proto);
384 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
385 (void) pmap_unset (sep->se_rpcprog, n);
386 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
387 syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
388 sep->se_service, sep->se_proto,
389 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
393 static void unregister_rpc (servtab_t *sep)
397 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
398 if (!pmap_unset (sep->se_rpcprog, n))
399 syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
402 #endif /* CONFIG_FEATURE_INETD_RPC */
404 static void freeconfig (servtab_t *cp)
408 free (cp->se_hostaddr);
409 free (cp->se_service);
413 free (cp->se_server);
414 for (i = 0; i < MAXARGV; i++)
415 free (cp->se_argv[i]);
418 static int bump_nofile (void)
424 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
425 syslog (LOG_ERR, "getrlimit: %m");
428 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
429 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
430 if (rl.rlim_cur <= rlim_ofile_cur) {
431 syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
436 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
437 syslog (LOG_ERR, "setrlimit: %m");
441 rlim_ofile_cur = rl.rlim_cur;
445 static void setup (servtab_t *sep)
450 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
451 syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
454 #define turnon(fd, opt) \
455 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
456 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
457 syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
460 #ifdef CONFIG_FEATURE_INETD_RPC
461 if (isrpcservice (sep)) {
465 * for RPC services, attempt to use a reserved port
466 * if they are going to be running as root.
468 * Also, zero out the port for all RPC services; let bind()
471 sep->se_ctrladdr_in.sin_port = 0;
472 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
473 pwd->pw_uid == 0 && uid == 0)
474 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
476 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
478 socklen_t len = sep->se_ctrladdr_size;
479 int saveerrno = errno;
481 /* update se_ctrladdr_in.sin_port */
482 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
489 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
491 syslog (LOG_ERR, "%s/%s (%d): bind: %m",
492 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
501 if (sep->se_socktype == SOCK_STREAM)
502 listen (sep->se_fd, global_queuelen);
504 FD_SET (sep->se_fd, &allsock);
506 if (sep->se_fd > maxsock) {
507 maxsock = sep->se_fd;
508 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
513 static char *nextline (void)
518 if (fgets (line, sizeof (line), fd) == NULL)
520 cp = strchr (line, '\n');
526 static char *skip (char **cpp) /* int report; */
534 /* syslog(LOG_ERR, "syntax error in inetd config file"); */
539 while (*cp == ' ' || *cp == '\t')
545 (void) ungetc (c, fconfig);
546 if (c == ' ' || c == '\t')
547 if ((cp = nextline ()))
554 while (*cp && *cp != ' ' && *cp != '\t')
558 /* if ((*cpp = cp) == NULL) */
565 static servtab_t *new_servtab(void)
569 sep = (servtab_t *) malloc (sizeof (servtab_t));
571 syslog (LOG_ERR, bb_msg_memory_exhausted);
577 static servtab_t *dupconfig (servtab_t *sep)
582 newtab = new_servtab();
583 memset (newtab, 0, sizeof (servtab_t));
584 newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
585 newtab->se_socktype = sep->se_socktype;
586 newtab->se_family = sep->se_family;
587 newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
588 #ifdef CONFIG_FEATURE_INETD_RPC
589 newtab->se_rpcprog = sep->se_rpcprog;
590 newtab->se_rpcversl = sep->se_rpcversl;
591 newtab->se_rpcversh = sep->se_rpcversh;
593 newtab->se_wait = sep->se_wait;
594 newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
595 newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
596 #ifdef INETD_FEATURE_ENABLED
597 newtab->se_bi = sep->se_bi;
599 newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
601 for (argc = 0; argc <= MAXARGV; argc++)
602 newtab->se_argv[argc] = sep->se_argv[argc] ?
603 newstr (sep->se_argv[argc]) : NULL;
604 newtab->se_max = sep->se_max;
609 static servtab_t *getconfigent (void)
620 /* memset(sep, 0, sizeof *sep); */
622 /* freeconfig(sep); */
624 while ((cp = nextline ()) && *cp == '#');
630 memset ((char *) sep, 0, sizeof *sep);
637 /* Check for a host name. */
638 hostdelim = strrchr (arg, ':');
641 sep->se_hostaddr = newstr (arg);
644 * If the line is of the form `host:', then just change the
645 * default host for the following lines.
651 defhost = sep->se_hostaddr;
656 sep->se_hostaddr = newstr (defhost);
658 sep->se_service = newstr (arg);
661 if (strcmp (arg, "stream") == 0)
662 sep->se_socktype = SOCK_STREAM;
663 else if (strcmp (arg, "dgram") == 0)
664 sep->se_socktype = SOCK_DGRAM;
665 else if (strcmp (arg, "rdm") == 0)
666 sep->se_socktype = SOCK_RDM;
667 else if (strcmp (arg, "seqpacket") == 0)
668 sep->se_socktype = SOCK_SEQPACKET;
669 else if (strcmp (arg, "raw") == 0)
670 sep->se_socktype = SOCK_RAW;
672 sep->se_socktype = -1;
674 sep->se_proto = newstr (skip (&cp));
676 if (strcmp (sep->se_proto, "unix") == 0) {
677 sep->se_family = AF_UNIX;
679 sep->se_family = AF_INET;
680 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
681 #ifdef CONFIG_FEATURE_IPV6
682 sep->se_family = AF_INET6;
684 syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
686 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
687 #ifdef CONFIG_FEATURE_INETD_RPC
691 p = strchr (sep->se_service, '/');
693 syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
697 l = strtol (p, &ccp, 0);
698 if (ccp == p || l < 0 || l > INT_MAX) {
700 syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
703 sep->se_rpcversl = sep->se_rpcversh = l;
706 l = strtol (p, &ccp, 0);
707 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
709 sep->se_rpcversh = l;
710 } else if (*ccp != '\0')
713 syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
722 char *s = strchr (arg, '.');
725 sep->se_max = atoi (s);
727 sep->se_max = toomany;
729 sep->se_wait = strcmp (arg, "wait") == 0;
730 /* if ((arg = skip(&cp, 1)) == NULL) */
732 sep->se_user = newstr (skip (&cp));
733 arg = strchr (sep->se_user, '.');
735 arg = strchr (sep->se_user, ':');
738 sep->se_group = newstr (arg);
740 /* if ((arg = skip(&cp, 1)) == NULL) */
743 sep->se_server = newstr (skip (&cp));
744 if (strcmp (sep->se_server, "internal") == 0) {
745 #ifdef INETD_FEATURE_ENABLED
746 const struct builtin *bi;
748 for (bi = builtins; bi->bi_service; bi++)
749 if (bi->bi_socktype == sep->se_socktype &&
750 strcmp (bi->bi_service, sep->se_service) == 0)
752 if (bi->bi_service == 0) {
753 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
757 sep->se_wait = bi->bi_wait;
759 syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
763 #ifdef INETD_FEATURE_ENABLED
768 for (arg = skip (&cp); cp; arg = skip (&cp)) {
770 sep->se_argv[argc++] = newstr (arg);
772 while (argc <= MAXARGV)
773 sep->se_argv[argc++] = NULL;
776 * Now that we've processed the entire line, check if the hostname
777 * specifier was a comma separated list of hostnames. If so
778 * we'll make new entries for each address.
780 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
781 nsep = dupconfig (sep);
784 * NULL terminate the hostname field of the existing entry,
785 * and make a dup for the new entry.
788 nsep->se_hostaddr = newstr (hostdelim);
790 nsep->se_next = sep->se_next;
795 while (nsep != NULL) {
796 nsep->se_checked = 1;
797 if (nsep->se_family == AF_INET) {
798 if (!strcmp (nsep->se_hostaddr, "*"))
799 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
800 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
803 hp = gethostbyname (nsep->se_hostaddr);
805 syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
806 nsep->se_checked = 0;
808 } else if (hp->h_addrtype != AF_INET) {
810 "%s: address isn't an Internet "
811 "address", nsep->se_hostaddr);
812 nsep->se_checked = 0;
817 memmove (&nsep->se_ctrladdr_in.sin_addr,
818 hp->h_addr_list[0], sizeof (struct in_addr));
819 while (hp->h_addr_list[i] != NULL) {
820 psep = dupconfig (nsep);
821 psep->se_hostaddr = newstr (nsep->se_hostaddr);
822 psep->se_checked = 1;
823 memmove (&psep->se_ctrladdr_in.sin_addr,
824 hp->h_addr_list[i], sizeof (struct in_addr));
825 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
827 /* Prepend to list, don't want to look up its */
828 /* hostname again. */
835 /* XXX BUG?: is this skip: label supposed to remain? */
837 nsep = nsep->se_next;
841 * Finally, free any entries which failed the gethostbyname
846 while (nsep != NULL) {
849 if (nsep->se_checked == 0) {
855 nsep = nsep->se_next;
856 psep->se_next = nsep;
860 nsep->se_checked = 0;
862 nsep = nsep->se_next;
869 #define Block_Using_Signals(m) do { sigemptyset(&m); \
870 sigaddset(&m, SIGCHLD); \
871 sigaddset(&m, SIGHUP); \
872 sigaddset(&m, SIGALRM); \
873 sigprocmask(SIG_BLOCK, &m, NULL); \
877 static servtab_t *enter (servtab_t *cp)
885 #ifdef CONFIG_FEATURE_INETD_RPC
886 sep->se_rpcprog = -1;
888 Block_Using_Signals(omask);
889 sep->se_next = servtab;
891 sigprocmask(SIG_UNBLOCK, &omask, NULL);
895 static int matchconf (servtab_t *old, servtab_t *new)
897 if (strcmp (old->se_service, new->se_service) != 0)
900 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
903 if (strcmp (old->se_proto, new->se_proto) != 0)
907 * If the new servtab is bound to a specific address, check that the
908 * old servtab is bound to the same entry. If the new service is not
909 * bound to a specific address then the check of se_hostaddr above
913 if (old->se_family == AF_INET && new->se_family == AF_INET &&
914 memcmp (&old->se_ctrladdr_in.sin_addr,
915 &new->se_ctrladdr_in.sin_addr,
916 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
919 #ifdef CONFIG_FEATURE_IPV6
920 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
921 memcmp (&old->se_ctrladdr_in6.sin6_addr,
922 &new->se_ctrladdr_in6.sin6_addr,
923 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
929 static void config (int sig ATTRIBUTE_UNUSED)
931 servtab_t *sep, *cp, **sepp;
938 syslog (LOG_ERR, "%s: %m", CONFIG);
941 for (sep = servtab; sep; sep = sep->se_next)
943 cp = getconfigent ();
945 for (sep = servtab; sep; sep = sep->se_next)
946 if (matchconf (sep, cp))
952 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
954 Block_Using_Signals(omask);
956 * sep->se_wait may be holding the pid of a daemon
957 * that we're waiting for. If so, don't overwrite
958 * it unless the config file explicitly says don't
962 #ifdef INETD_FEATURE_ENABLED
965 (sep->se_wait == 1 || cp->se_wait == 0))
966 sep->se_wait = cp->se_wait;
967 SWAP (int, cp->se_max, sep->se_max);
968 SWAP (char *, sep->se_user, cp->se_user);
969 SWAP (char *, sep->se_group, cp->se_group);
970 SWAP (char *, sep->se_server, cp->se_server);
971 for (i = 0; i < MAXARGV; i++)
972 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
975 #ifdef CONFIG_FEATURE_INETD_RPC
976 if (isrpcservice (sep))
977 unregister_rpc (sep);
978 sep->se_rpcversl = cp->se_rpcversl;
979 sep->se_rpcversh = cp->se_rpcversh;
981 sigprocmask(SIG_UNBLOCK, &omask, NULL);
989 switch (sep->se_family) {
991 if (sep->se_fd != -1)
993 (void) unlink (sep->se_service);
994 n = strlen (sep->se_service);
995 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
996 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
997 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
998 sep->se_ctrladdr_un.sun_family = AF_UNIX;
999 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1003 sep->se_ctrladdr_in.sin_family = AF_INET;
1004 /* se_ctrladdr_in was set in getconfigent */
1005 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1007 #ifdef CONFIG_FEATURE_INETD_RPC
1008 if (isrpcservice (sep)) {
1011 sep->se_rpcprog = atoi (sep->se_service);
1012 if (sep->se_rpcprog == 0) {
1013 rp = getrpcbyname (sep->se_service);
1015 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1018 sep->se_rpcprog = rp->r_number;
1020 if (sep->se_fd == -1)
1022 if (sep->se_fd != -1)
1027 u_short port = htons (atoi (sep->se_service));
1030 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1031 if (isdigit (protoname[strlen (protoname) - 1]))
1032 protoname[strlen (protoname) - 1] = '\0';
1033 sp = getservbyname (sep->se_service, protoname);
1036 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1041 if (port != sep->se_ctrladdr_in.sin_port) {
1042 sep->se_ctrladdr_in.sin_port = port;
1043 if (sep->se_fd != -1) {
1044 FD_CLR (sep->se_fd, &allsock);
1046 (void) close (sep->se_fd);
1050 if (sep->se_fd == -1)
1054 #ifdef CONFIG_FEATURE_IPV6
1056 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1057 /* se_ctrladdr_in was set in getconfigent */
1058 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1060 #ifdef CONFIG_FEATURE_INETD_RPC
1061 if (isrpcservice (sep)) {
1064 sep->se_rpcprog = atoi (sep->se_service);
1065 if (sep->se_rpcprog == 0) {
1066 rp = getrpcbyname (sep->se_service);
1068 syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
1071 sep->se_rpcprog = rp->r_number;
1073 if (sep->se_fd == -1)
1075 if (sep->se_fd != -1)
1080 u_short port = htons (atoi (sep->se_service));
1083 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1084 if (isdigit (protoname[strlen (protoname) - 1]))
1085 protoname[strlen (protoname) - 1] = '\0';
1086 sp = getservbyname (sep->se_service, protoname);
1089 "%s/%s: unknown service", sep->se_service, sep->se_proto);
1094 if (port != sep->se_ctrladdr_in6.sin6_port) {
1095 sep->se_ctrladdr_in6.sin6_port = port;
1096 if (sep->se_fd != -1) {
1097 FD_CLR (sep->se_fd, &allsock);
1099 (void) close (sep->se_fd);
1103 if (sep->se_fd == -1)
1107 #endif /* CONFIG_FEATURE_IPV6 */
1110 if (cp->se_next != NULL) {
1111 servtab_t *tmp = cp;
1117 cp = getconfigent ();
1122 * Purge anything not looked at above.
1124 Block_Using_Signals(omask);
1126 while ((sep = *sepp)) {
1127 if (sep->se_checked) {
1128 sepp = &sep->se_next;
1131 *sepp = sep->se_next;
1132 if (sep->se_fd != -1) {
1133 FD_CLR (sep->se_fd, &allsock);
1135 (void) close (sep->se_fd);
1137 #ifdef CONFIG_FEATURE_INETD_RPC
1138 if (isrpcservice (sep))
1139 unregister_rpc (sep);
1141 if (sep->se_family == AF_UNIX)
1142 (void) unlink (sep->se_service);
1146 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1150 static void reapchild (int sig ATTRIBUTE_UNUSED)
1153 int save_errno = errno, status;
1157 pid = wait3 (&status, WNOHANG, NULL);
1160 for (sep = servtab; sep; sep = sep->se_next)
1161 if (sep->se_wait == pid) {
1162 if (WIFEXITED (status) && WEXITSTATUS (status))
1163 syslog (LOG_WARNING,
1164 "%s: exit status 0x%x",
1165 sep->se_server, WEXITSTATUS (status));
1166 else if (WIFSIGNALED (status))
1167 syslog (LOG_WARNING,
1168 "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
1170 FD_SET (sep->se_fd, &allsock);
1177 static void retry (int sig ATTRIBUTE_UNUSED)
1182 for (sep = servtab; sep; sep = sep->se_next) {
1183 if (sep->se_fd == -1) {
1184 switch (sep->se_family) {
1187 #ifdef CONFIG_FEATURE_IPV6
1191 #ifdef CONFIG_FEATURE_INETD_RPC
1192 if (sep->se_fd != -1 && isrpcservice (sep))
1201 static void goaway (int sig ATTRIBUTE_UNUSED)
1205 /* XXX signal race walking sep list */
1206 for (sep = servtab; sep; sep = sep->se_next) {
1207 if (sep->se_fd == -1)
1210 switch (sep->se_family) {
1212 (void) unlink (sep->se_service);
1215 #ifdef CONFIG_FEATURE_IPV6
1218 #ifdef CONFIG_FEATURE_INETD_RPC
1219 if (sep->se_wait == 1 && isrpcservice (sep))
1220 unregister_rpc (sep); /* XXX signal race */
1224 (void) close (sep->se_fd);
1226 (void) unlink (_PATH_INETDPID);
1231 #ifdef INETD_SETPROCTITLE
1233 static char *LastArg;
1236 inetd_setproctitle (char *a, int s)
1240 struct sockaddr_in prt_sin;
1244 size = sizeof (prt_sin);
1245 (void) snprintf (buf, sizeof buf, "-%s", a);
1246 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1247 char *sa = inet_ntoa (prt_sin.sin_addr);
1249 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1254 strncpy (cp, buf, LastArg - cp);
1256 while (cp < LastArg)
1263 inetd_main (int argc, char *argv[])
1267 struct group *grp = NULL;
1269 struct sigaction sa, sapipe;
1274 sigset_t omask, wait_mask;
1276 #ifdef INETD_SETPROCTITLE
1277 extern char **environ;
1278 char **envp = environ;
1281 if (envp == 0 || *envp == 0)
1285 LastArg = envp[-1] + strlen (envp[-1]);
1288 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1290 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1294 toomany = strtoul (stoomany, &e, 0);
1295 if (!(toomany >= 0 && *e == '\0')) {
1297 syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
1309 bb_error_msg_and_die ("non-root must specify a config file");
1313 /* reexec for vfork() do continue parent */
1314 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1323 gid_t gid = getgid ();
1325 /* If run by hand, ensure groups vector gets trashed */
1326 setgroups (1, &gid);
1332 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1333 fprintf (fp, "%u\n", getpid ());
1338 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1339 syslog (LOG_ERR, "getrlimit: %m");
1341 rlim_ofile_cur = rlim_ofile.rlim_cur;
1342 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1343 rlim_ofile_cur = OPEN_MAX;
1346 memset ((char *) &sa, 0, sizeof (sa));
1347 sigemptyset (&sa.sa_mask);
1348 sigaddset (&sa.sa_mask, SIGALRM);
1349 sigaddset (&sa.sa_mask, SIGCHLD);
1350 sigaddset (&sa.sa_mask, SIGHUP);
1351 sa.sa_handler = retry;
1352 sigaction (SIGALRM, &sa, NULL);
1355 sa.sa_handler = config;
1356 sigaction (SIGHUP, &sa, NULL);
1357 sa.sa_handler = reapchild;
1358 sigaction (SIGCHLD, &sa, NULL);
1359 sa.sa_handler = goaway;
1360 sigaction (SIGTERM, &sa, NULL);
1361 sa.sa_handler = goaway;
1362 sigaction (SIGINT, &sa, NULL);
1363 sa.sa_handler = SIG_IGN;
1364 sigaction (SIGPIPE, &sa, &sapipe);
1365 memset(&wait_mask, 0, sizeof(wait_mask));
1367 /* space for daemons to overwrite environment for ps */
1368 #define DUMMYSIZE 100
1369 char dummy[DUMMYSIZE];
1371 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1372 dummy[DUMMYSIZE - 1] = '\0';
1374 (void) setenv ("inetd_dummy", dummy, 1);
1382 Block_Using_Signals(omask);
1384 sigsuspend (&wait_mask);
1385 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1389 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1390 if (n < 0 && errno != EINTR) {
1391 syslog (LOG_WARNING, "select: %m");
1396 for (sep = servtab; n && sep; sep = sep->se_next)
1397 if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
1399 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1400 ctrl = accept (sep->se_fd, NULL, NULL);
1404 syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
1407 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1408 struct sockaddr_in peer;
1409 socklen_t plen = sizeof (peer);
1411 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1412 syslog (LOG_WARNING, "could not getpeername");
1416 if (ntohs (peer.sin_port) == 20) {
1417 /* XXX ftp bounce */
1424 Block_Using_Signals(omask);
1426 #ifdef INETD_FEATURE_ENABLED
1427 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1430 if (sep->se_count++ == 0)
1431 (void) gettimeofday (&sep->se_time, NULL);
1432 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1435 (void) gettimeofday (&now, NULL);
1436 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1440 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1442 if (sep->se_family == AF_INET &&
1443 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1445 * Cannot close it -- there are
1446 * thieves on the system.
1447 * Simply ignore the connection.
1453 "%s/%s server failing (looping), service terminated",
1454 sep->se_service, sep->se_proto);
1455 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1457 FD_CLR (sep->se_fd, &allsock);
1458 (void) close (sep->se_fd);
1462 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1473 syslog (LOG_ERR, "fork: %m");
1474 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1476 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1480 if (pid && sep->se_wait) {
1482 FD_CLR (sep->se_fd, &allsock);
1485 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1487 #ifdef INETD_FEATURE_ENABLED
1489 (*sep->se_bi->bi_fn) (ctrl, sep);
1493 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1494 syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
1495 if (sep->se_socktype != SOCK_STREAM)
1496 recv (0, buf, sizeof (buf), 0);
1500 syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
1501 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1502 syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
1503 if (sep->se_socktype != SOCK_STREAM)
1504 recv (0, buf, sizeof (buf), 0);
1508 /* a user running private inetd */
1509 if (uid != pwd->pw_uid)
1511 } else if (pwd->pw_uid) {
1512 if (sep->se_group) {
1513 pwd->pw_gid = grp->gr_gid;
1515 setgid ((gid_t) pwd->pw_gid);
1516 initgroups (pwd->pw_name, pwd->pw_gid);
1517 setuid ((uid_t) pwd->pw_uid);
1518 } else if (sep->se_group) {
1519 setgid (grp->gr_gid);
1520 setgroups (1, &grp->gr_gid);
1526 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1527 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1528 syslog (LOG_ERR, "setrlimit: %m");
1530 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1531 (void) close (tmpint);
1532 sigaction (SIGPIPE, &sapipe, NULL);
1533 execv (sep->se_server, sep->se_argv);
1534 if (sep->se_socktype != SOCK_STREAM)
1535 recv (0, buf, sizeof (buf), 0);
1536 syslog (LOG_ERR, "execv %s: %m", sep->se_server);
1540 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1547 * Internet services provided internally by inetd:
1549 #define BUFSIZE 4096
1551 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \
1552 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \
1553 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME)
1554 static int dg_badinput (struct sockaddr_in *dg_sin)
1556 if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
1558 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
1560 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1565 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1566 /* Echo service -- echo data back */
1569 echo_stream (int s, servtab_t *sep)
1571 char buffer[BUFSIZE];
1574 inetd_setproctitle (sep->se_service, s);
1575 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1576 write (s, buffer, i) > 0);
1580 /* Echo service -- echo data back */
1583 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1585 char buffer[BUFSIZE];
1588 /* struct sockaddr_storage ss; */
1592 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1594 if (dg_badinput ((struct sockaddr_in *) &sa))
1596 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1598 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1600 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1601 /* Discard service -- ignore data */
1604 discard_stream (int s, servtab_t *sep)
1606 char buffer[BUFSIZE];
1608 inetd_setproctitle (sep->se_service, s);
1609 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1614 /* Discard service -- ignore data */
1617 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1619 char buffer[BUFSIZE];
1621 (void) read (s, buffer, sizeof (buffer));
1623 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1626 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1628 static char ring[128];
1629 static char *endring;
1638 for (i = 0; i <= 128; ++i)
1643 /* Character generator */
1646 chargen_stream (int s, servtab_t *sep)
1650 char text[LINESIZ + 2];
1652 inetd_setproctitle (sep->se_service, s);
1659 text[LINESIZ] = '\r';
1660 text[LINESIZ + 1] = '\n';
1662 if ((len = endring - rs) >= LINESIZ)
1663 memmove (text, rs, LINESIZ);
1665 memmove (text, rs, len);
1666 memmove (text + len, ring, LINESIZ - len);
1668 if (++rs == endring)
1670 if (write (s, text, sizeof (text)) != sizeof (text))
1676 /* Character generator */
1679 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1681 /* struct sockaddr_storage ss; */
1685 char text[LINESIZ + 2];
1694 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1696 if (dg_badinput ((struct sockaddr_in *) &sa))
1699 if ((len = endring - rs) >= LINESIZ)
1700 memmove (text, rs, LINESIZ);
1702 memmove (text, rs, len);
1703 memmove (text + len, ring, LINESIZ - len);
1705 if (++rs == endring)
1707 text[LINESIZ] = '\r';
1708 text[LINESIZ + 1] = '\n';
1709 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1711 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1714 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1716 * Return a machine readable date and time, in the form of the
1717 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1718 * returns the number of seconds since midnight, Jan 1, 1970,
1719 * we must add 2208988800 seconds to this figure to make up for
1720 * some seventy years Bell Labs was asleep.
1723 static u_int machtime (void)
1727 if (gettimeofday (&tv, NULL) < 0) {
1728 fprintf (stderr, "Unable to get time of day\n");
1731 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1736 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1740 result = machtime ();
1741 (void) write (s, (char *) &result, sizeof (result));
1746 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1749 /* struct sockaddr_storage ss; */
1751 struct sockaddr_in *dg_sin;
1755 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1757 /* if (dg_badinput((struct sockaddr *)&ss)) */
1758 dg_sin = (struct sockaddr_in *) &sa;
1759 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1760 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1762 result = machtime ();
1763 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1765 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1768 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1769 /* Return human-readable time of day */
1771 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1778 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1779 (void) write (s, buffer, strlen (buffer));
1782 /* Return human-readable time of day */
1785 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1789 /* struct sockaddr_storage ss; */
1793 t = time ((time_t *) 0);
1796 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1798 if (dg_badinput ((struct sockaddr_in *) &sa))
1800 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1801 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1803 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */
1804 /* vi: set sw=4 ts=4: */