1 /* vi: set sw=4 ts=4: */
2 /* $Slackware: inetd.c 1.79s 2001/02/06 13:18:00 volkerdi Exp $ */
3 /* $OpenBSD: inetd.c,v 1.79 2001/01/30 08:30:57 deraadt Exp $ */
4 /* $NetBSD: inetd.c,v 1.11 1996/02/22 11:14:41 mycroft Exp $ */
5 /* Busybox port by Vladimir Oleynik (C) 2001-2005 <dzo@simtreas.ru> */
7 * Copyright (c) 1983,1991 The Regents of the University of California.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.
107 /* inetd rules for passing file descriptors to children
108 * (http://www.freebsd.org/cgi/man.cgi?query=inetd):
110 * The wait/nowait entry specifies whether the server that is invoked by
111 * inetd will take over the socket associated with the service access point,
112 * and thus whether inetd should wait for the server to exit before listen-
113 * ing for new service requests. Datagram servers must use "wait", as
114 * they are always invoked with the original datagram socket bound to the
115 * specified service address. These servers must read at least one datagram
116 * from the socket before exiting. If a datagram server connects to its
117 * peer, freeing the socket so inetd can receive further messages on the
118 * socket, it is said to be a "multi-threaded" server; it should read one
119 * datagram from the socket and create a new socket connected to the peer.
120 * It should fork, and the parent should then exit to allow inetd to check
121 * for new service requests to spawn new servers. Datagram servers which
122 * process all incoming datagrams on a socket and eventually time out are
123 * said to be "single-threaded". The comsat(8), (biff(1)) and talkd(8)
124 * utilities are both examples of the latter type of datagram server. The
125 * tftpd(8) utility is an example of a multi-threaded datagram server.
127 * Servers using stream sockets generally are multi-threaded and use the
128 * "nowait" entry. Connection requests for these services are accepted by
129 * inetd, and the server is given only the newly-accepted socket connected
130 * to a client of the service. Most stream-based services operate in this
131 * manner. Stream-based servers that use "wait" are started with the lis-
132 * tening service socket, and must accept at least one connection request
133 * before exiting. Such a server would normally accept and process incoming
134 * connection requests until a timeout.
137 /* Here's the scoop concerning the user[.:]group feature:
139 * 1) set-group-option off.
141 * a) user = root: NO setuid() or setgid() is done
143 * b) other: setgid(primary group as found in passwd)
144 * initgroups(name, primary group)
147 * 2) set-group-option on.
149 * a) user = root: setgid(specified group)
153 * b) other: setgid(specified group)
154 * initgroups(name, specified group)
162 //#define ENABLE_FEATURE_INETD_RPC 1
163 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO 1
164 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD 1
165 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME 1
166 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME 1
167 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN 1
168 //#define ENABLE_FEATURE_IPV6 1
170 #if ENABLE_FEATURE_INETD_RPC
172 #include <rpc/pmap_clnt.h>
175 #define _PATH_INETDCONF "/etc/inetd.conf"
176 #define _PATH_INETDPID "/var/run/inetd.pid"
179 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
180 #define RETRYTIME (60*10) /* retry after bind or server fail */
182 #ifndef RLIMIT_NOFILE
183 #define RLIMIT_NOFILE RLIMIT_OFILE
190 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
192 static rlim_t rlim_ofile_cur = OPEN_MAX;
193 static struct rlimit rlim_ofile;
196 /* Check unsupporting builtin */
197 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
198 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
199 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
200 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
201 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
202 # define INETD_FEATURE_ENABLED
205 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
206 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
207 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
208 # define INETD_SETPROCTITLE
211 typedef struct servtab {
212 char *se_hostaddr; /* host address to listen on */
213 char *se_service; /* name of service */
214 int se_socktype; /* type of socket to use */
215 int se_family; /* address family */
216 char *se_proto; /* protocol used */
217 #if ENABLE_FEATURE_INETD_RPC
218 int se_rpcprog; /* rpc program number */
219 int se_rpcversl; /* rpc program lowest version */
220 int se_rpcversh; /* rpc program highest version */
221 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
223 #define isrpcservice(sep) 0
225 pid_t se_wait; /* single threaded server */
226 short se_checked; /* looked at during merge */
227 char *se_user; /* user name to run as */
228 char *se_group; /* group name to run as */
229 #ifdef INETD_FEATURE_ENABLED
230 const struct builtin *se_bi; /* if built-in, description */
232 char *se_server; /* server program */
234 char *se_argv[MAXARGV + 1]; /* program arguments */
235 int se_fd; /* open descriptor */
237 struct sockaddr se_un_ctrladdr;
238 struct sockaddr_in se_un_ctrladdr_in;
239 #if ENABLE_FEATURE_IPV6
240 struct sockaddr_in6 se_un_ctrladdr_in6;
242 struct sockaddr_un se_un_ctrladdr_un;
243 } se_un; /* bound address */
244 #define se_ctrladdr se_un.se_un_ctrladdr
245 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
246 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
247 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
248 int se_ctrladdr_size;
249 int se_max; /* max # of instances of this service */
250 int se_count; /* number started since se_time */
251 struct timeval se_time; /* start of se_count */
252 struct servtab *se_next;
255 static servtab_t *servtab;
257 #ifdef INETD_FEATURE_ENABLED
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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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;
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 /* xstrdup(NULL) returns NULL, but this one
337 * will return newly-allocated "" if called with NULL arg
338 * TODO: audit whether this makes any real difference
340 static char *xxstrdup(char *cp)
342 return xstrdup(cp ? cp : "");
345 static int setconfig(void)
348 defhost = xstrdup("*");
349 if (fconfig != NULL) {
350 fseek(fconfig, 0L, SEEK_SET);
353 fconfig = fopen(CONFIG, "r");
354 return (fconfig != NULL);
357 static void endconfig(void)
360 (void) fclose(fconfig);
367 #if ENABLE_FEATURE_INETD_RPC
368 static void register_rpc(servtab_t *sep)
371 struct sockaddr_in ir_sin;
375 if ((pp = getprotobyname(sep->se_proto + 4)) == NULL) {
376 bb_perror_msg("%s: getproto", sep->se_proto);
379 size = sizeof ir_sin;
380 if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
381 bb_perror_msg("%s/%s: getsockname",
382 sep->se_service, sep->se_proto);
386 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
387 (void) pmap_unset(sep->se_rpcprog, n);
388 if (!pmap_set(sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port)))
389 bb_perror_msg("%s %s: pmap_set: %u %u %u %u",
390 sep->se_service, sep->se_proto,
391 sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port));
395 static void unregister_rpc(servtab_t *sep)
399 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
400 if (!pmap_unset(sep->se_rpcprog, n))
401 bb_error_msg("pmap_unset(%u, %u)", sep->se_rpcprog, n);
404 #endif /* FEATURE_INETD_RPC */
406 static void freeconfig(servtab_t *cp)
410 free(cp->se_hostaddr);
411 free(cp->se_service);
416 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 bb_perror_msg("getrlimit");
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 bb_error_msg("bump_nofile: cannot extend file limit, max = %d",
438 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
439 bb_perror_msg("setrlimit");
443 rlim_ofile_cur = rl.rlim_cur;
447 static void setup(servtab_t *sep)
451 sep->se_fd = socket(sep->se_family, sep->se_socktype, 0);
452 if (sep->se_fd < 0) {
453 bb_perror_msg("%s/%s: socket", sep->se_service, sep->se_proto);
456 if (setsockopt_reuseaddr(sep->se_fd) < 0)
457 bb_perror_msg("setsockopt(SO_REUSEADDR)");
459 #if ENABLE_FEATURE_INETD_RPC
460 if (isrpcservice(sep)) {
464 * for RPC services, attempt to use a reserved port
465 * if they are going to be running as root.
467 * Also, zero out the port for all RPC services; let bind()
470 sep->se_ctrladdr_in.sin_port = 0;
471 if (sep->se_user && (pwd = getpwnam(sep->se_user)) &&
472 pwd->pw_uid == 0 && uid == 0)
473 r = bindresvport(sep->se_fd, &sep->se_ctrladdr_in);
475 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
477 socklen_t len = sep->se_ctrladdr_size;
478 int saveerrno = errno;
480 /* update se_ctrladdr_in.sin_port */
481 r = getsockname(sep->se_fd, &sep->se_ctrladdr, &len);
488 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
490 bb_perror_msg("%s/%s (%d): bind",
491 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
500 if (sep->se_socktype == SOCK_STREAM)
501 listen(sep->se_fd, global_queuelen);
503 FD_SET(sep->se_fd, &allsock);
505 if (sep->se_fd > maxsock) {
506 maxsock = sep->se_fd;
507 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
512 static char *nextline(void)
517 if (fgets(line, sizeof(line), fd) == NULL)
519 cp = strchr(line, '\n');
525 static char *skip(char **cpp) /* int report; */
533 /* bb_error_msg("syntax error in inetd config file"); */
538 while (*cp == ' ' || *cp == '\t')
544 (void) ungetc(c, fconfig);
545 if (c == ' ' || c == '\t')
546 if ((cp = nextline()))
553 while (*cp && *cp != ' ' && *cp != '\t')
557 /* if ((*cpp = cp) == NULL) */
564 static servtab_t *new_servtab(void)
566 return xmalloc(sizeof(servtab_t));
569 static servtab_t *dupconfig(servtab_t *sep)
574 newtab = new_servtab();
575 memset(newtab, 0, sizeof(servtab_t));
576 newtab->se_service = xstrdup(sep->se_service);
577 newtab->se_socktype = sep->se_socktype;
578 newtab->se_family = sep->se_family;
579 newtab->se_proto = xstrdup(sep->se_proto);
580 #if ENABLE_FEATURE_INETD_RPC
581 newtab->se_rpcprog = sep->se_rpcprog;
582 newtab->se_rpcversl = sep->se_rpcversl;
583 newtab->se_rpcversh = sep->se_rpcversh;
585 newtab->se_wait = sep->se_wait;
586 newtab->se_user = xstrdup(sep->se_user);
587 newtab->se_group = xstrdup(sep->se_group);
588 #ifdef INETD_FEATURE_ENABLED
589 newtab->se_bi = sep->se_bi;
591 newtab->se_server = xstrdup(sep->se_server);
593 for (argc = 0; argc <= MAXARGV; argc++)
594 newtab->se_argv[argc] = xstrdup(sep->se_argv[argc]);
595 newtab->se_max = sep->se_max;
600 static servtab_t *getconfigent(void)
611 /* memset(sep, 0, sizeof *sep); */
613 /* freeconfig(sep); */
615 while ((cp = nextline()) && *cp == '#') /* skip comment line */;
621 memset((char *) sep, 0, sizeof *sep);
628 /* Check for a host name. */
629 hostdelim = strrchr(arg, ':');
632 sep->se_hostaddr = xstrdup(arg);
635 * If the line is of the form `host:', then just change the
636 * default host for the following lines.
642 defhost = sep->se_hostaddr;
647 sep->se_hostaddr = xxstrdup(defhost);
649 sep->se_service = xxstrdup(arg);
652 if (strcmp(arg, "stream") == 0)
653 sep->se_socktype = SOCK_STREAM;
654 else if (strcmp(arg, "dgram") == 0)
655 sep->se_socktype = SOCK_DGRAM;
656 else if (strcmp(arg, "rdm") == 0)
657 sep->se_socktype = SOCK_RDM;
658 else if (strcmp(arg, "seqpacket") == 0)
659 sep->se_socktype = SOCK_SEQPACKET;
660 else if (strcmp(arg, "raw") == 0)
661 sep->se_socktype = SOCK_RAW;
663 sep->se_socktype = -1;
665 sep->se_proto = xxstrdup(skip(&cp));
667 if (strcmp(sep->se_proto, "unix") == 0) {
668 sep->se_family = AF_UNIX;
670 sep->se_family = AF_INET;
671 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6')
672 #if ENABLE_FEATURE_IPV6
673 sep->se_family = AF_INET6;
675 bb_error_msg("%s: IPV6 not supported", sep->se_proto);
677 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
678 #if ENABLE_FEATURE_INETD_RPC
682 p = strchr(sep->se_service, '/');
684 bb_error_msg("%s: no rpc version", sep->se_service);
688 l = strtol(p, &ccp, 0);
689 if (ccp == p || l < 0 || l > INT_MAX) {
691 bb_error_msg("%s/%s: bad rpc version", sep->se_service, p);
694 sep->se_rpcversl = sep->se_rpcversh = l;
697 l = strtol(p, &ccp, 0);
698 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
700 sep->se_rpcversh = l;
701 } else if (*ccp != '\0')
704 bb_error_msg("%s: rpc services not supported", sep->se_service);
713 char *s = strchr(arg, '.');
716 sep->se_max = xatoi(s);
718 sep->se_max = toomany;
720 sep->se_wait = strcmp(arg, "wait") == 0;
721 /* if ((arg = skip(&cp, 1)) == NULL) */
723 sep->se_user = xxstrdup(skip(&cp));
724 arg = strchr(sep->se_user, '.');
726 arg = strchr(sep->se_user, ':');
729 sep->se_group = xstrdup(arg);
731 /* if ((arg = skip(&cp, 1)) == NULL) */
734 sep->se_server = xxstrdup(skip(&cp));
735 if (strcmp(sep->se_server, "internal") == 0) {
736 #ifdef INETD_FEATURE_ENABLED
737 const struct builtin *bi;
739 for (bi = builtins; bi->bi_service; bi++)
740 if (bi->bi_socktype == sep->se_socktype &&
741 strcmp(bi->bi_service, sep->se_service) == 0)
743 if (bi->bi_service == 0) {
744 bb_error_msg("internal service %s unknown", sep->se_service);
748 sep->se_wait = bi->bi_wait;
750 bb_perror_msg("internal service %s unknown", sep->se_service);
754 #ifdef INETD_FEATURE_ENABLED
759 for (arg = skip(&cp); cp; arg = skip(&cp)) {
761 sep->se_argv[argc++] = xxstrdup(arg);
763 while (argc <= MAXARGV)
764 sep->se_argv[argc++] = NULL;
767 * Now that we've processed the entire line, check if the hostname
768 * specifier was a comma separated list of hostnames. If so
769 * we'll make new entries for each address.
771 while ((hostdelim = strrchr(sep->se_hostaddr, ',')) != NULL) {
772 nsep = dupconfig(sep);
775 * NULL terminate the hostname field of the existing entry,
776 * and make a dup for the new entry.
779 nsep->se_hostaddr = xstrdup(hostdelim);
781 nsep->se_next = sep->se_next;
786 while (nsep != NULL) {
787 nsep->se_checked = 1;
788 if (nsep->se_family == AF_INET) {
789 if (LONE_CHAR(nsep->se_hostaddr, '*'))
790 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
791 else if (!inet_aton(nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
794 hp = gethostbyname(nsep->se_hostaddr);
796 bb_error_msg("%s: unknown host", nsep->se_hostaddr);
797 nsep->se_checked = 0;
799 } else if (hp->h_addrtype != AF_INET) {
800 bb_error_msg("%s: address isn't an Internet "
801 "address", nsep->se_hostaddr);
802 nsep->se_checked = 0;
807 memmove(&nsep->se_ctrladdr_in.sin_addr,
808 hp->h_addr_list[0], sizeof(struct in_addr));
809 while (hp->h_addr_list[i] != NULL) {
810 psep = dupconfig(nsep);
811 psep->se_hostaddr = xxstrdup(nsep->se_hostaddr);
812 psep->se_checked = 1;
813 memmove(&psep->se_ctrladdr_in.sin_addr,
814 hp->h_addr_list[i], sizeof(struct in_addr));
815 psep->se_ctrladdr_size = sizeof(psep->se_ctrladdr_in);
817 /* Prepend to list, don't want to look up */
818 /* its hostname again. */
825 /* XXX BUG?: is this skip: label supposed to remain? */
827 nsep = nsep->se_next;
831 * Finally, free any entries which failed the gethostbyname
836 while (nsep != NULL) {
839 if (nsep->se_checked == 0) {
845 nsep = nsep->se_next;
846 psep->se_next = nsep;
850 nsep->se_checked = 0;
852 nsep = nsep->se_next;
859 #define Block_Using_Signals(m) do { \
861 sigaddset(&m, SIGCHLD); \
862 sigaddset(&m, SIGHUP); \
863 sigaddset(&m, SIGALRM); \
864 sigprocmask(SIG_BLOCK, &m, NULL); \
867 static servtab_t *enter(servtab_t *cp)
875 #if ENABLE_FEATURE_INETD_RPC
876 sep->se_rpcprog = -1;
878 Block_Using_Signals(omask);
879 sep->se_next = servtab;
881 sigprocmask(SIG_UNBLOCK, &omask, NULL);
885 static int matchconf(servtab_t *old, servtab_t *new)
887 if (strcmp(old->se_service, new->se_service) != 0)
890 if (strcmp(old->se_hostaddr, new->se_hostaddr) != 0)
893 if (strcmp(old->se_proto, new->se_proto) != 0)
897 * If the new servtab is bound to a specific address, check that the
898 * old servtab is bound to the same entry. If the new service is not
899 * bound to a specific address then the check of se_hostaddr above
903 if (old->se_family == AF_INET && new->se_family == AF_INET &&
904 memcmp(&old->se_ctrladdr_in.sin_addr,
905 &new->se_ctrladdr_in.sin_addr,
906 sizeof(new->se_ctrladdr_in.sin_addr)) != 0)
909 #if ENABLE_FEATURE_IPV6
910 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
911 memcmp(&old->se_ctrladdr_in6.sin6_addr,
912 &new->se_ctrladdr_in6.sin6_addr,
913 sizeof(new->se_ctrladdr_in6.sin6_addr)) != 0)
919 static void config(int sig ATTRIBUTE_UNUSED)
921 servtab_t *sep, *cp, **sepp;
927 bb_perror_msg("%s", CONFIG);
930 for (sep = servtab; sep; sep = sep->se_next)
934 for (sep = servtab; sep; sep = sep->se_next)
935 if (matchconf(sep, cp))
941 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
943 Block_Using_Signals(omask);
945 * sep->se_wait may be holding the pid of a daemon
946 * that we're waiting for. If so, don't overwrite
947 * it unless the config file explicitly says don't
951 #ifdef INETD_FEATURE_ENABLED
954 (sep->se_wait == 1 || cp->se_wait == 0))
955 sep->se_wait = cp->se_wait;
956 SWAP(int, cp->se_max, sep->se_max);
957 SWAP(char *, sep->se_user, cp->se_user);
958 SWAP(char *, sep->se_group, cp->se_group);
959 SWAP(char *, sep->se_server, cp->se_server);
960 for (i = 0; i < MAXARGV; i++)
961 SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
964 #if ENABLE_FEATURE_INETD_RPC
965 if (isrpcservice(sep))
967 sep->se_rpcversl = cp->se_rpcversl;
968 sep->se_rpcversh = cp->se_rpcversh;
970 sigprocmask(SIG_UNBLOCK, &omask, NULL);
977 switch (sep->se_family) {
979 if (sep->se_fd != -1)
981 (void) unlink(sep->se_service);
982 n = strlen(sep->se_service);
983 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
984 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
985 safe_strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
986 sep->se_ctrladdr_un.sun_family = AF_UNIX;
987 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
991 sep->se_ctrladdr_in.sin_family = AF_INET;
992 /* se_ctrladdr_in was set in getconfigent */
993 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
995 #if ENABLE_FEATURE_INETD_RPC
996 if (isrpcservice(sep)) {
998 // FIXME: atoi_or_else(str, 0) would be handy here
999 sep->se_rpcprog = atoi(sep->se_service);
1000 if (sep->se_rpcprog == 0) {
1001 rp = getrpcbyname(sep->se_service);
1003 bb_error_msg("%s: unknown rpc service", sep->se_service);
1006 sep->se_rpcprog = rp->r_number;
1008 if (sep->se_fd == -1)
1010 if (sep->se_fd != -1)
1015 uint16_t port = htons(atoi(sep->se_service));
1016 // FIXME: atoi_or_else(str, 0) would be handy here
1018 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1019 if (isdigit(protoname[strlen(protoname) - 1]))
1020 protoname[strlen(protoname) - 1] = '\0';
1021 sp = getservbyname(sep->se_service, protoname);
1023 bb_error_msg("%s/%s: unknown service",
1024 sep->se_service, sep->se_proto);
1029 if (port != sep->se_ctrladdr_in.sin_port) {
1030 sep->se_ctrladdr_in.sin_port = port;
1031 if (sep->se_fd != -1) {
1032 FD_CLR(sep->se_fd, &allsock);
1034 (void) close(sep->se_fd);
1038 if (sep->se_fd == -1)
1042 #if ENABLE_FEATURE_IPV6
1044 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1045 /* se_ctrladdr_in was set in getconfigent */
1046 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1048 #if ENABLE_FEATURE_INETD_RPC
1049 if (isrpcservice(sep)) {
1052 sep->se_rpcprog = atoi(sep->se_service);
1053 if (sep->se_rpcprog == 0) {
1054 rp = getrpcbyname(sep->se_service);
1056 bb_error_msg("%s: unknown rpc service", sep->se_service);
1059 sep->se_rpcprog = rp->r_number;
1061 if (sep->se_fd == -1)
1063 if (sep->se_fd != -1)
1068 uint16_t port = htons(atoi(sep->se_service));
1071 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1072 if (isdigit(protoname[strlen(protoname) - 1]))
1073 protoname[strlen(protoname) - 1] = '\0';
1074 sp = getservbyname(sep->se_service, protoname);
1076 bb_error_msg("%s/%s: unknown service",
1077 sep->se_service, sep->se_proto);
1082 if (port != sep->se_ctrladdr_in6.sin6_port) {
1083 sep->se_ctrladdr_in6.sin6_port = port;
1084 if (sep->se_fd != -1) {
1085 FD_CLR(sep->se_fd, &allsock);
1087 (void) close(sep->se_fd);
1091 if (sep->se_fd == -1)
1095 #endif /* FEATURE_IPV6 */
1098 if (cp->se_next != NULL) {
1099 servtab_t *tmp = cp;
1105 cp = getconfigent();
1110 * Purge anything not looked at above.
1112 Block_Using_Signals(omask);
1114 while ((sep = *sepp)) {
1115 if (sep->se_checked) {
1116 sepp = &sep->se_next;
1119 *sepp = sep->se_next;
1120 if (sep->se_fd != -1) {
1121 FD_CLR(sep->se_fd, &allsock);
1123 (void) close(sep->se_fd);
1125 #if ENABLE_FEATURE_INETD_RPC
1126 if (isrpcservice(sep))
1127 unregister_rpc(sep);
1129 if (sep->se_family == AF_UNIX)
1130 (void) unlink(sep->se_service);
1134 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1138 static void reapchild(int sig ATTRIBUTE_UNUSED)
1141 int save_errno = errno, status;
1145 pid = wait3(&status, WNOHANG, NULL);
1148 for (sep = servtab; sep; sep = sep->se_next)
1149 if (sep->se_wait == pid) {
1150 if (WIFEXITED(status) && WEXITSTATUS(status))
1151 bb_error_msg("%s: exit status 0x%x",
1152 sep->se_server, WEXITSTATUS(status));
1153 else if (WIFSIGNALED(status))
1154 bb_error_msg("%s: exit signal 0x%x",
1155 sep->se_server, WTERMSIG(status));
1157 FD_SET(sep->se_fd, &allsock);
1164 static void retry(int sig ATTRIBUTE_UNUSED)
1169 for (sep = servtab; sep; sep = sep->se_next) {
1170 if (sep->se_fd == -1) {
1171 switch (sep->se_family) {
1174 #if ENABLE_FEATURE_IPV6
1178 #if ENABLE_FEATURE_INETD_RPC
1179 if (sep->se_fd != -1 && isrpcservice(sep))
1188 static void goaway(int sig ATTRIBUTE_UNUSED)
1192 /* XXX signal race walking sep list */
1193 for (sep = servtab; sep; sep = sep->se_next) {
1194 if (sep->se_fd == -1)
1197 switch (sep->se_family) {
1199 (void) unlink(sep->se_service);
1202 #if ENABLE_FEATURE_IPV6
1205 #if ENABLE_FEATURE_INETD_RPC
1206 if (sep->se_wait == 1 && isrpcservice(sep))
1207 unregister_rpc(sep); /* XXX signal race */
1211 (void) close(sep->se_fd);
1213 (void) unlink(_PATH_INETDPID);
1218 #ifdef INETD_SETPROCTITLE
1220 static char *LastArg;
1223 inetd_setproctitle(char *a, int s)
1227 struct sockaddr_in prt_sin;
1231 size = sizeof(prt_sin);
1232 (void) snprintf(buf, sizeof buf, "-%s", a);
1233 if (getpeername(s, (struct sockaddr *) &prt_sin, &size) == 0) {
1234 char *sa = inet_ntoa(prt_sin.sin_addr);
1236 buf[sizeof(buf) - 1 - strlen(sa) - 3] = '\0';
1241 strncpy(cp, buf, LastArg - cp);
1243 while (cp < LastArg)
1250 inetd_main(int argc, char *argv[])
1254 struct group *grp = NULL;
1256 struct sigaction sa, sapipe;
1261 sigset_t omask, wait_mask;
1263 #ifdef INETD_SETPROCTITLE
1264 extern char **environ;
1265 char **envp = environ;
1268 if (envp == 0 || *envp == 0)
1272 LastArg = envp[-1] + strlen(envp[-1]);
1275 opt = getopt32(argc, argv, "R:f", &stoomany);
1277 toomany = xatoi_u(stoomany);
1288 bb_error_msg_and_die("non-root must specify a config file");
1292 /* reexec for vfork() do continue parent */
1293 vfork_daemon_rexec(0, 0, argc, argv, "-f");
1295 bb_sanitize_stdio();
1297 bb_sanitize_stdio_maybe_daemonize(!(opt & 2));
1299 openlog(applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1300 logmode = LOGMODE_SYSLOG;
1303 /* If run by hand, ensure groups vector gets trashed */
1304 gid_t gid = getgid();
1309 FILE *fp = fopen(_PATH_INETDPID, "w");
1311 fprintf(fp, "%u\n", getpid());
1316 if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
1317 bb_perror_msg("getrlimit");
1319 rlim_ofile_cur = rlim_ofile.rlim_cur;
1320 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1321 rlim_ofile_cur = OPEN_MAX;
1324 memset((char *) &sa, 0, sizeof(sa));
1325 sigemptyset(&sa.sa_mask);
1326 sigaddset(&sa.sa_mask, SIGALRM);
1327 sigaddset(&sa.sa_mask, SIGCHLD);
1328 sigaddset(&sa.sa_mask, SIGHUP);
1329 sa.sa_handler = retry;
1330 sigaction(SIGALRM, &sa, NULL);
1332 sa.sa_handler = config;
1333 sigaction(SIGHUP, &sa, NULL);
1334 sa.sa_handler = reapchild;
1335 sigaction(SIGCHLD, &sa, NULL);
1336 sa.sa_handler = goaway;
1337 sigaction(SIGTERM, &sa, NULL);
1338 sa.sa_handler = goaway;
1339 sigaction(SIGINT, &sa, NULL);
1340 sa.sa_handler = SIG_IGN;
1341 sigaction(SIGPIPE, &sa, &sapipe);
1342 memset(&wait_mask, 0, sizeof(wait_mask));
1344 /* space for daemons to overwrite environment for ps */
1345 #define DUMMYSIZE 100
1346 char dummy[DUMMYSIZE];
1348 (void) memset(dummy, 'x', DUMMYSIZE - 1);
1349 dummy[DUMMYSIZE - 1] = '\0';
1351 (void) setenv("inetd_dummy", dummy, 1);
1359 Block_Using_Signals(omask);
1361 sigsuspend(&wait_mask);
1362 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1366 n = select(maxsock + 1, &readable, NULL, NULL, NULL);
1368 if (n < 0 && errno != EINTR) {
1369 bb_perror_msg("select");
1375 for (sep = servtab; n && sep; sep = sep->se_next) {
1376 if (sep->se_fd == -1 || !FD_ISSET(sep->se_fd, &readable))
1380 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1381 ctrl = accept(sep->se_fd, NULL, NULL);
1385 bb_perror_msg("accept (for %s)", sep->se_service);
1388 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1389 struct sockaddr_in peer;
1390 socklen_t plen = sizeof(peer);
1392 if (getpeername(ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1393 bb_error_msg("cannot getpeername");
1397 if (ntohs(peer.sin_port) == 20) {
1398 /* XXX ftp bounce */
1406 Block_Using_Signals(omask);
1408 #ifdef INETD_FEATURE_ENABLED
1409 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1412 if (sep->se_count++ == 0)
1413 (void) gettimeofday(&sep->se_time, NULL);
1414 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1417 (void) gettimeofday(&now, NULL);
1418 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1422 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1424 if (sep->se_family == AF_INET &&
1425 ntohs(sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1427 * Cannot close it -- there are
1428 * thieves on the system.
1429 * Simply ignore the connection.
1434 bb_error_msg("%s/%s server failing (looping), service terminated",
1435 sep->se_service, sep->se_proto);
1436 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1438 FD_CLR(sep->se_fd, &allsock);
1439 (void) close(sep->se_fd);
1443 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1454 bb_perror_msg("fork");
1455 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1457 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1461 if (pid && sep->se_wait) {
1463 FD_CLR(sep->se_fd, &allsock);
1466 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1468 #ifdef INETD_FEATURE_ENABLED
1470 (*sep->se_bi->bi_fn)(ctrl, sep);
1474 pwd = getpwnam(sep->se_user);
1476 bb_error_msg("getpwnam: %s: no such user", sep->se_user);
1480 bb_perror_msg("%s: setsid", sep->se_service);
1481 if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) {
1482 bb_error_msg("getgrnam: %s: no such group", sep->se_group);
1486 /* a user running private inetd */
1487 if (uid != pwd->pw_uid)
1489 } else if (pwd->pw_uid) {
1491 pwd->pw_gid = grp->gr_gid;
1492 xsetgid((gid_t) pwd->pw_gid);
1493 initgroups(pwd->pw_name, pwd->pw_gid);
1494 xsetuid((uid_t) pwd->pw_uid);
1495 } else if (sep->se_group) {
1496 xsetgid(grp->gr_gid);
1497 setgroups(1, &grp->gr_gid);
1500 if (ctrl) close(ctrl);
1503 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1504 if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0)
1505 bb_perror_msg("setrlimit");
1507 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1508 (void) close(tmpint);
1509 sigaction(SIGPIPE, &sapipe, NULL);
1510 execv(sep->se_server, sep->se_argv);
1511 bb_perror_msg("execv %s", sep->se_server);
1513 if (sep->se_socktype != SOCK_STREAM)
1514 recv(0, buf, sizeof(buf), 0);
1518 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1520 } /* for (sep = servtab...) */
1525 * Internet services provided internally by inetd:
1527 #define BUFSIZE 4096
1529 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
1530 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN || \
1531 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1532 static int dg_badinput(struct sockaddr_in *dg_sin)
1534 if (ntohs(dg_sin->sin_port) < IPPORT_RESERVED)
1536 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST))
1538 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1543 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1544 /* Echo service -- echo data back */
1547 echo_stream(int s, servtab_t *sep)
1549 char buffer[BUFSIZE];
1552 inetd_setproctitle(sep->se_service, s);
1554 i = read(s, buffer, sizeof(buffer));
1556 /* FIXME: this isnt correct - safe_write()? */
1557 if (write(s, buffer, i) <= 0) break;
1562 /* Echo service -- echo data back */
1565 echo_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1567 char buffer[BUFSIZE];
1570 /* struct sockaddr_storage ss; */
1574 i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size);
1577 if (dg_badinput((struct sockaddr_in *) &sa))
1579 (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
1581 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1583 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1584 /* Discard service -- ignore data */
1587 discard_stream(int s, servtab_t *sep)
1589 char buffer[BUFSIZE];
1591 inetd_setproctitle(sep->se_service, s);
1594 if (read(s, buffer, sizeof(buffer)) <= 0 && errno != EINTR)
1599 /* Discard service -- ignore data */
1602 discard_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1604 char buffer[BUFSIZE];
1606 (void) read(s, buffer, sizeof(buffer));
1608 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1611 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1613 static char ring[128];
1614 static char *endring;
1623 for (i = 0; i <= 128; ++i)
1628 /* Character generator */
1631 chargen_stream(int s, servtab_t *sep)
1635 char text[LINESIZ + 2];
1637 inetd_setproctitle(sep->se_service, s);
1644 text[LINESIZ] = '\r';
1645 text[LINESIZ + 1] = '\n';
1650 memmove(text, rs, LINESIZ);
1652 memmove(text, rs, len);
1653 memmove(text + len, ring, LINESIZ - len);
1655 if (++rs == endring)
1657 if (write(s, text, sizeof(text)) != sizeof(text))
1663 /* Character generator */
1666 chargen_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1668 /* struct sockaddr_storage ss; */
1672 char text[LINESIZ + 2];
1681 if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
1683 if (dg_badinput((struct sockaddr_in *) &sa))
1686 if ((len = endring - rs) >= LINESIZ)
1687 memmove(text, rs, LINESIZ);
1689 memmove(text, rs, len);
1690 memmove(text + len, ring, LINESIZ - len);
1692 if (++rs == endring)
1694 text[LINESIZ] = '\r';
1695 text[LINESIZ + 1] = '\n';
1696 (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
1698 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1701 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1703 * Return a machine readable date and time, in the form of the
1704 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1705 * returns the number of seconds since midnight, Jan 1, 1970,
1706 * we must add 2208988800 seconds to this figure to make up for
1707 * some seventy years Bell Labs was asleep.
1710 static unsigned machtime(void)
1714 if (gettimeofday(&tv, NULL) < 0) {
1715 fprintf(stderr, "Unable to get time of day\n");
1718 return htonl((unsigned) tv.tv_sec + 2208988800UL);
1723 machtime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1727 result = machtime();
1728 (void) write(s, (char *) &result, sizeof(result));
1733 machtime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1736 /* struct sockaddr_storage ss; */
1738 struct sockaddr_in *dg_sin;
1742 if (recvfrom(s, (char *) &result, sizeof(result), 0, &sa, &size) < 0)
1744 /* if (dg_badinput((struct sockaddr *)&ss)) */
1745 dg_sin = (struct sockaddr_in *) &sa;
1746 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST) ||
1747 ntohs(dg_sin->sin_port) < IPPORT_RESERVED / 2)
1749 result = machtime();
1750 (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
1752 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1755 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1756 /* Return human-readable time of day */
1758 static void daytime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1765 // fdprintf instead?
1766 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1767 (void) write(s, buffer, strlen(buffer));
1770 /* Return human-readable time of day */
1773 daytime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1777 /* struct sockaddr_storage ss; */
1784 if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
1786 if (dg_badinput((struct sockaddr_in *) &sa))
1788 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1789 (void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
1791 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */