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 extern char **environ;
178 #define _PATH_INETDPID "/var/run/inetd.pid"
180 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
181 #define RETRYTIME (60*10) /* retry after bind or server fail */
183 #ifndef RLIMIT_NOFILE
184 #define RLIMIT_NOFILE RLIMIT_OFILE
191 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
194 /* Check unsupporting builtin */
195 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
196 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
197 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
198 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
199 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
200 # define INETD_FEATURE_ENABLED
203 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
204 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
205 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
206 # define INETD_SETPROCTITLE
209 typedef struct servtab_t {
210 /* The most frequently referenced one: */
211 int se_fd; /* open descriptor */
212 /* NB: 'biggest fields last' saves on code size (~250 bytes) */
213 char *se_hostaddr; /* host address to listen on */
214 char *se_service; /* name of service */
215 char *se_proto; /* protocol used */
216 #if ENABLE_FEATURE_INETD_RPC
217 int se_rpcprog; /* rpc program number */
218 int se_rpcversl; /* rpc program lowest version */
219 int se_rpcversh; /* rpc program highest version */
220 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
222 #define isrpcservice(sep) 0
224 pid_t se_wait; /* single threaded server */
225 socktype_t se_socktype; /* type of socket to use */
226 family_t se_family; /* address family */
227 smallint se_checked; /* looked at during merge */
228 char *se_user; /* user name to run as */
229 char *se_group; /* group name to run as */
230 #ifdef INETD_FEATURE_ENABLED
231 const struct builtin *se_bi; /* if built-in, description */
233 int se_ctrladdr_size;
234 int se_max; /* max # of instances of this service */
235 int se_count; /* number started since se_time */
236 struct servtab_t *se_next;
237 struct timeval se_time; /* start of se_count */
238 char *se_server; /* server program */
240 char *se_argv[MAXARGV + 1]; /* program arguments */
242 struct sockaddr se_un_ctrladdr;
243 struct sockaddr_in se_un_ctrladdr_in;
244 #if ENABLE_FEATURE_IPV6
245 struct sockaddr_in6 se_un_ctrladdr_in6;
247 struct sockaddr_un se_un_ctrladdr_un;
248 } se_un; /* bound address */
249 #define se_ctrladdr se_un.se_un_ctrladdr
250 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
251 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
252 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
255 #ifdef INETD_FEATURE_ENABLED
257 const char *bi_service; /* internally provided service name */
258 socktype_t bi_socktype; /* type of socket supported */
259 uint8_t bi_fork; /* 1 if should fork before call */
260 // Commented since it is always 0
261 // uint8_t bi_wait; /* 1 if should wait for child */
262 void (*bi_fn) (int, servtab_t *);
265 /* Echo received data */
266 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_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 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
293 /* Echo received data */
294 {"echo", SOCK_STREAM, 1, echo_stream,},
295 {"echo", SOCK_DGRAM, 0, echo_dg,},
297 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
298 /* Internet /dev/null */
299 {"discard", SOCK_STREAM, 1, discard_stream,},
300 {"discard", SOCK_DGRAM, 0, discard_dg,},
302 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
303 /* Return 32 bit time since 1900 */
304 {"time", SOCK_STREAM, 0, machtime_stream,},
305 {"time", SOCK_DGRAM, 0, machtime_dg,},
307 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
308 /* Return human-readable time */
309 {"daytime", SOCK_STREAM, 0, daytime_stream,},
310 {"daytime", SOCK_DGRAM, 0, daytime_dg,},
312 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
313 /* Familiar character generator */
314 {"chargen", SOCK_STREAM, 1, chargen_stream,},
315 {"chargen", SOCK_DGRAM, 0, chargen_dg,},
317 { /* zero filled */ }
319 #endif /* INETD_FEATURE_ENABLED */
322 rlim_t rlim_ofile_cur;
323 struct rlimit rlim_ofile;
332 const char *config_filename;
335 #ifdef INETD_SETPROCTITLE
339 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
345 /* Used only in nextline() */
346 char line[80]; /* at least 80, see LINE_SIZE */
348 #define G (*(struct globals*)&bb_common_bufsiz1)
349 enum { LINE_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line) };
350 struct BUG_G_too_big {
351 char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
353 #define rlim_ofile_cur (G.rlim_ofile_cur )
354 #define rlim_ofile (G.rlim_ofile )
355 #define servtab (G.servtab )
356 #define global_queuelen (G.global_queuelen)
357 #define nsock (G.nsock )
358 #define maxsock (G.maxsock )
359 #define toomany (G.toomany )
360 #define timingout (G.timingout )
363 #define config_filename (G.config_filename)
364 #define fconfig (G.fconfig )
365 #define defhost (G.defhost )
366 #define Argv (G.Argv )
367 #define LastArg (G.LastArg )
368 #define endring (G.endring )
369 #define ringpos (G.ringpos )
370 #define ring (G.ring )
371 #define allsock (G.allsock )
372 #define line (G.line )
373 #define INIT_G() do { \
374 rlim_ofile_cur = OPEN_MAX; \
375 global_queuelen = 128; \
376 config_filename = "/etc/inetd.conf"; \
379 /* xstrdup(NULL) returns NULL, but this one
380 * will return newly-allocated "" if called with NULL arg
381 * TODO: audit whether this makes any real difference
383 static char *xxstrdup(char *cp)
385 return xstrdup(cp ? cp : "");
388 static int setconfig(void)
391 defhost = xstrdup("*");
392 if (fconfig != NULL) {
393 fseek(fconfig, 0L, SEEK_SET);
396 fconfig = fopen(config_filename, "r");
397 return (fconfig != NULL);
400 static void endconfig(void)
403 (void) fclose(fconfig);
410 #if ENABLE_FEATURE_INETD_RPC
411 static void register_rpc(servtab_t *sep)
414 struct sockaddr_in ir_sin;
418 pp = getprotobyname(sep->se_proto + 4);
420 bb_perror_msg("%s: getproto", sep->se_proto);
423 size = sizeof ir_sin;
424 if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
425 bb_perror_msg("%s/%s: getsockname",
426 sep->se_service, sep->se_proto);
430 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
431 (void) pmap_unset(sep->se_rpcprog, n);
432 if (!pmap_set(sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port)))
433 bb_perror_msg("%s %s: pmap_set: %u %u %u %u",
434 sep->se_service, sep->se_proto,
435 sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port));
439 static void unregister_rpc(servtab_t *sep)
443 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
444 if (!pmap_unset(sep->se_rpcprog, n))
445 bb_error_msg("pmap_unset(%u, %u)", sep->se_rpcprog, n);
448 #endif /* FEATURE_INETD_RPC */
450 static void freeconfig(servtab_t *cp)
454 free(cp->se_hostaddr);
455 free(cp->se_service);
460 for (i = 0; i < MAXARGV; i++)
461 free(cp->se_argv[i]);
464 static int bump_nofile(void)
470 if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
471 bb_perror_msg("getrlimit");
474 rl.rlim_cur = MIN(rl.rlim_max, rl.rlim_cur + FD_CHUNK);
475 rl.rlim_cur = MIN(FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
476 if (rl.rlim_cur <= rlim_ofile_cur) {
477 bb_error_msg("bump_nofile: cannot extend file limit, max = %d",
482 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
483 bb_perror_msg("setrlimit");
487 rlim_ofile_cur = rl.rlim_cur;
491 static void setup(servtab_t *sep)
495 sep->se_fd = socket(sep->se_family, sep->se_socktype, 0);
496 if (sep->se_fd < 0) {
497 bb_perror_msg("%s/%s: socket", sep->se_service, sep->se_proto);
500 setsockopt_reuseaddr(sep->se_fd);
502 #if ENABLE_FEATURE_INETD_RPC
503 if (isrpcservice(sep)) {
507 * for RPC services, attempt to use a reserved port
508 * if they are going to be running as root.
510 * Also, zero out the port for all RPC services; let bind()
513 sep->se_ctrladdr_in.sin_port = 0;
514 if (sep->se_user && (pwd = getpwnam(sep->se_user)) &&
515 pwd->pw_uid == 0 && uid == 0)
516 r = bindresvport(sep->se_fd, &sep->se_ctrladdr_in);
518 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
520 socklen_t len = sep->se_ctrladdr_size;
521 int saveerrno = errno;
523 /* update se_ctrladdr_in.sin_port */
524 r = getsockname(sep->se_fd, &sep->se_ctrladdr, &len);
531 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
533 bb_perror_msg("%s/%s (%d): bind",
534 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
543 if (sep->se_socktype == SOCK_STREAM)
544 listen(sep->se_fd, global_queuelen);
546 FD_SET(sep->se_fd, &allsock);
548 if (sep->se_fd > maxsock) {
549 maxsock = sep->se_fd;
550 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
555 static char *nextline(void)
557 if (fgets(line, LINE_SIZE, fconfig) == NULL)
559 *strchrnul(line, '\n') = '\0';
563 static char *skip(char **cpp) /* int report; */
571 /* bb_error_msg("syntax error in inetd config file"); */
576 while (*cp == ' ' || *cp == '\t')
579 int c = getc(fconfig);
581 if (c == ' ' || c == '\t') {
590 while (*cp && *cp != ' ' && *cp != '\t')
599 static servtab_t *new_servtab(void)
601 return xzalloc(sizeof(servtab_t));
604 static servtab_t *dupconfig(servtab_t *sep)
609 newtab = new_servtab();
610 newtab->se_service = xstrdup(sep->se_service);
611 newtab->se_socktype = sep->se_socktype;
612 newtab->se_family = sep->se_family;
613 newtab->se_proto = xstrdup(sep->se_proto);
614 #if ENABLE_FEATURE_INETD_RPC
615 newtab->se_rpcprog = sep->se_rpcprog;
616 newtab->se_rpcversl = sep->se_rpcversl;
617 newtab->se_rpcversh = sep->se_rpcversh;
619 newtab->se_wait = sep->se_wait;
620 newtab->se_user = xstrdup(sep->se_user);
621 newtab->se_group = xstrdup(sep->se_group);
622 #ifdef INETD_FEATURE_ENABLED
623 newtab->se_bi = sep->se_bi;
625 newtab->se_server = xstrdup(sep->se_server);
627 for (argc = 0; argc <= MAXARGV; argc++)
628 newtab->se_argv[argc] = xstrdup(sep->se_argv[argc]);
629 newtab->se_max = sep->se_max;
634 static servtab_t *getconfigent(void)
646 while ((cp = nextline()) && *cp == '#')
647 continue; /* skip comment lines */
659 /* Check for a host name. */
660 hostdelim = strrchr(arg, ':');
663 sep->se_hostaddr = xstrdup(arg);
666 * If the line is of the form `host:', then just change the
667 * default host for the following lines.
673 defhost = sep->se_hostaddr;
678 sep->se_hostaddr = xxstrdup(defhost);
680 sep->se_service = xxstrdup(arg);
684 static int8_t SOCK_xxx[] ALIGN1 = {
686 SOCK_STREAM, SOCK_DGRAM, SOCK_RDM,
687 SOCK_SEQPACKET, SOCK_RAW
689 sep->se_socktype = SOCK_xxx[1 + index_in_strings(
690 "stream""\0" "dgram""\0" "rdm""\0"
691 "seqpacket""\0" "raw""\0"
695 sep->se_proto = xxstrdup(skip(&cp));
697 if (strcmp(sep->se_proto, "unix") == 0) {
698 sep->se_family = AF_UNIX;
700 sep->se_family = AF_INET;
701 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6')
702 #if ENABLE_FEATURE_IPV6
703 sep->se_family = AF_INET6;
705 bb_error_msg("%s: IPV6 not supported", sep->se_proto);
707 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
708 #if ENABLE_FEATURE_INETD_RPC
712 p = strchr(sep->se_service, '/');
714 bb_error_msg("%s: no rpc version", sep->se_service);
718 l = strtol(p, &ccp, 0);
719 if (ccp == p || l < 0 || l > INT_MAX) {
721 bb_error_msg("%s/%s: bad rpc version", sep->se_service, p);
724 sep->se_rpcversl = sep->se_rpcversh = l;
727 l = strtol(p, &ccp, 0);
728 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
730 sep->se_rpcversh = l;
731 } else if (*ccp != '\0')
734 bb_error_msg("%s: rpc services not supported", sep->se_service);
743 char *s = strchr(arg, '.');
746 sep->se_max = xatoi(s);
748 sep->se_max = toomany;
750 sep->se_wait = (strcmp(arg, "wait") == 0);
751 sep->se_user = xxstrdup(skip(&cp));
752 arg = strchr(sep->se_user, '.');
754 arg = strchr(sep->se_user, ':');
757 sep->se_group = xstrdup(arg);
760 sep->se_server = xxstrdup(skip(&cp));
761 #ifdef INETD_FEATURE_ENABLED
762 /* sep->se_bi = NULL; - done by new_servtab() */
763 if (strcmp(sep->se_server, "internal") == 0) {
764 const struct builtin *bi;
766 for (bi = builtins; bi->bi_service; bi++)
767 if (bi->bi_socktype == sep->se_socktype
768 && strcmp(bi->bi_service, sep->se_service) == 0)
770 if (bi->bi_service == 0) {
771 bb_error_msg("internal service %s unknown", sep->se_service);
775 sep->se_wait = 0; /* = bi->bi_wait; - always 0 */
779 while ((arg = skip(&cp)) != NULL && argc < MAXARGV) {
780 sep->se_argv[argc++] = xxstrdup(arg);
782 /* while (argc <= MAXARGV) */
783 /* sep->se_argv[argc++] = NULL; - done by new_servtab() */
786 * Now that we've processed the entire line, check if the hostname
787 * specifier was a comma separated list of hostnames. If so
788 * we'll make new entries for each address.
790 while ((hostdelim = strrchr(sep->se_hostaddr, ',')) != NULL) {
791 nsep = dupconfig(sep);
794 * NULL terminate the hostname field of the existing entry,
795 * and make a dup for the new entry.
798 nsep->se_hostaddr = xstrdup(hostdelim);
800 nsep->se_next = sep->se_next;
805 while (nsep != NULL) {
806 nsep->se_checked = 1;
807 if (nsep->se_family == AF_INET) {
808 if (LONE_CHAR(nsep->se_hostaddr, '*'))
809 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
810 else if (!inet_aton(nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
814 hp = gethostbyname(nsep->se_hostaddr);
816 bb_error_msg("%s: unknown host", nsep->se_hostaddr);
817 nsep->se_checked = 0;
820 if (hp->h_addrtype != AF_INET) {
821 bb_error_msg("%s: address isn't an Internet "
822 "address", nsep->se_hostaddr);
823 nsep->se_checked = 0;
827 memmove(&nsep->se_ctrladdr_in.sin_addr,
828 hp->h_addr_list[0], sizeof(struct in_addr));
829 while (hp->h_addr_list[i] != NULL) {
830 psep = dupconfig(nsep);
831 psep->se_hostaddr = xxstrdup(nsep->se_hostaddr);
832 psep->se_checked = 1;
833 memmove(&psep->se_ctrladdr_in.sin_addr,
834 hp->h_addr_list[i], sizeof(struct in_addr));
835 psep->se_ctrladdr_size = sizeof(psep->se_ctrladdr_in);
837 /* Prepend to list, don't want to look up */
838 /* its hostname again. */
844 /* XXX BUG?: is this skip: label supposed to remain? */
846 nsep = nsep->se_next;
850 * Finally, free any entries which failed the gethostbyname
855 while (nsep != NULL) {
858 if (nsep->se_checked == 0) {
864 nsep = nsep->se_next;
865 psep->se_next = nsep;
869 nsep->se_checked = 0;
871 nsep = nsep->se_next;
878 #define Block_Using_Signals(m) do { \
880 sigaddset(&m, SIGCHLD); \
881 sigaddset(&m, SIGHUP); \
882 sigaddset(&m, SIGALRM); \
883 sigprocmask(SIG_BLOCK, &m, NULL); \
886 static servtab_t *enter(servtab_t *cp)
894 #if ENABLE_FEATURE_INETD_RPC
895 sep->se_rpcprog = -1;
897 Block_Using_Signals(omask);
898 sep->se_next = servtab;
900 sigprocmask(SIG_UNBLOCK, &omask, NULL);
904 static int matchconf(servtab_t *old, servtab_t *new)
906 if (strcmp(old->se_service, new->se_service) != 0)
909 if (strcmp(old->se_hostaddr, new->se_hostaddr) != 0)
912 if (strcmp(old->se_proto, new->se_proto) != 0)
916 * If the new servtab is bound to a specific address, check that the
917 * old servtab is bound to the same entry. If the new service is not
918 * bound to a specific address then the check of se_hostaddr above
922 if (old->se_family == AF_INET && new->se_family == AF_INET &&
923 memcmp(&old->se_ctrladdr_in.sin_addr,
924 &new->se_ctrladdr_in.sin_addr,
925 sizeof(new->se_ctrladdr_in.sin_addr)) != 0)
928 #if ENABLE_FEATURE_IPV6
929 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
930 memcmp(&old->se_ctrladdr_in6.sin6_addr,
931 &new->se_ctrladdr_in6.sin6_addr,
932 sizeof(new->se_ctrladdr_in6.sin6_addr)) != 0)
938 static void config(int sig ATTRIBUTE_UNUSED)
940 servtab_t *sep, *cp, **sepp;
946 bb_simple_perror_msg(config_filename);
949 for (sep = servtab; sep; sep = sep->se_next)
953 for (sep = servtab; sep; sep = sep->se_next)
954 if (matchconf(sep, cp))
960 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
962 Block_Using_Signals(omask);
964 * sep->se_wait may be holding the pid of a daemon
965 * that we're waiting for. If so, don't overwrite
966 * it unless the config file explicitly says don't
970 #ifdef INETD_FEATURE_ENABLED
973 (sep->se_wait == 1 || cp->se_wait == 0))
974 sep->se_wait = cp->se_wait;
975 SWAP(int, cp->se_max, sep->se_max);
976 SWAP(char *, sep->se_user, cp->se_user);
977 SWAP(char *, sep->se_group, cp->se_group);
978 SWAP(char *, sep->se_server, cp->se_server);
979 for (i = 0; i < MAXARGV; i++)
980 SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
983 #if ENABLE_FEATURE_INETD_RPC
984 if (isrpcservice(sep))
986 sep->se_rpcversl = cp->se_rpcversl;
987 sep->se_rpcversh = cp->se_rpcversh;
989 sigprocmask(SIG_UNBLOCK, &omask, NULL);
996 switch (sep->se_family) {
998 if (sep->se_fd != -1)
1000 (void) unlink(sep->se_service);
1001 n = strlen(sep->se_service);
1002 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
1003 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
1004 safe_strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
1005 sep->se_ctrladdr_un.sun_family = AF_UNIX;
1006 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1010 sep->se_ctrladdr_in.sin_family = AF_INET;
1011 /* se_ctrladdr_in was set in getconfigent */
1012 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1014 #if ENABLE_FEATURE_INETD_RPC
1015 if (isrpcservice(sep)) {
1017 // FIXME: atoi_or_else(str, 0) would be handy here
1018 sep->se_rpcprog = atoi(sep->se_service);
1019 if (sep->se_rpcprog == 0) {
1020 rp = getrpcbyname(sep->se_service);
1022 bb_error_msg("%s: unknown rpc service", sep->se_service);
1025 sep->se_rpcprog = rp->r_number;
1027 if (sep->se_fd == -1)
1029 if (sep->se_fd != -1)
1034 uint16_t port = htons(atoi(sep->se_service));
1035 // FIXME: atoi_or_else(str, 0) would be handy here
1037 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1038 if (isdigit(protoname[strlen(protoname) - 1]))
1039 protoname[strlen(protoname) - 1] = '\0';
1040 sp = getservbyname(sep->se_service, protoname);
1042 bb_error_msg("%s/%s: unknown service",
1043 sep->se_service, sep->se_proto);
1048 if (port != sep->se_ctrladdr_in.sin_port) {
1049 sep->se_ctrladdr_in.sin_port = port;
1050 if (sep->se_fd != -1) {
1051 FD_CLR(sep->se_fd, &allsock);
1053 (void) close(sep->se_fd);
1057 if (sep->se_fd == -1)
1061 #if ENABLE_FEATURE_IPV6
1063 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1064 /* se_ctrladdr_in was set in getconfigent */
1065 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1067 #if ENABLE_FEATURE_INETD_RPC
1068 if (isrpcservice(sep)) {
1071 sep->se_rpcprog = atoi(sep->se_service);
1072 if (sep->se_rpcprog == 0) {
1073 rp = getrpcbyname(sep->se_service);
1075 bb_error_msg("%s: unknown rpc service", sep->se_service);
1078 sep->se_rpcprog = rp->r_number;
1080 if (sep->se_fd == -1)
1082 if (sep->se_fd != -1)
1087 uint16_t port = htons(atoi(sep->se_service));
1090 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1091 if (isdigit(protoname[strlen(protoname) - 1]))
1092 protoname[strlen(protoname) - 1] = '\0';
1093 sp = getservbyname(sep->se_service, protoname);
1095 bb_error_msg("%s/%s: unknown service",
1096 sep->se_service, sep->se_proto);
1101 if (port != sep->se_ctrladdr_in6.sin6_port) {
1102 sep->se_ctrladdr_in6.sin6_port = port;
1103 if (sep->se_fd != -1) {
1104 FD_CLR(sep->se_fd, &allsock);
1106 (void) close(sep->se_fd);
1110 if (sep->se_fd == -1)
1114 #endif /* FEATURE_IPV6 */
1117 if (cp->se_next != NULL) {
1118 servtab_t *tmp = cp;
1124 cp = getconfigent();
1129 * Purge anything not looked at above.
1131 Block_Using_Signals(omask);
1133 while ((sep = *sepp)) {
1134 if (sep->se_checked) {
1135 sepp = &sep->se_next;
1138 *sepp = sep->se_next;
1139 if (sep->se_fd != -1) {
1140 FD_CLR(sep->se_fd, &allsock);
1142 (void) close(sep->se_fd);
1144 #if ENABLE_FEATURE_INETD_RPC
1145 if (isrpcservice(sep))
1146 unregister_rpc(sep);
1148 if (sep->se_family == AF_UNIX)
1149 (void) unlink(sep->se_service);
1153 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1157 static void reapchild(int sig ATTRIBUTE_UNUSED)
1160 int save_errno = errno, status;
1164 pid = wait3(&status, WNOHANG, NULL);
1167 for (sep = servtab; sep; sep = sep->se_next)
1168 if (sep->se_wait == pid) {
1169 if (WIFEXITED(status) && WEXITSTATUS(status))
1170 bb_error_msg("%s: exit status 0x%x",
1171 sep->se_server, WEXITSTATUS(status));
1172 else if (WIFSIGNALED(status))
1173 bb_error_msg("%s: exit signal 0x%x",
1174 sep->se_server, WTERMSIG(status));
1176 FD_SET(sep->se_fd, &allsock);
1183 static void retry(int sig ATTRIBUTE_UNUSED)
1188 for (sep = servtab; sep; sep = sep->se_next) {
1189 if (sep->se_fd == -1) {
1190 switch (sep->se_family) {
1193 #if ENABLE_FEATURE_IPV6
1197 #if ENABLE_FEATURE_INETD_RPC
1198 if (sep->se_fd != -1 && isrpcservice(sep))
1207 static void goaway(int sig ATTRIBUTE_UNUSED)
1211 /* XXX signal race walking sep list */
1212 for (sep = servtab; sep; sep = sep->se_next) {
1213 if (sep->se_fd == -1)
1216 switch (sep->se_family) {
1218 (void) unlink(sep->se_service);
1221 #if ENABLE_FEATURE_IPV6
1224 #if ENABLE_FEATURE_INETD_RPC
1225 if (sep->se_wait == 1 && isrpcservice(sep))
1226 unregister_rpc(sep); /* XXX signal race */
1230 (void) close(sep->se_fd);
1232 remove_pidfile(_PATH_INETDPID);
1237 #ifdef INETD_SETPROCTITLE
1240 inetd_setproctitle(char *a, int s)
1244 struct sockaddr_in prt_sin;
1248 size = sizeof(prt_sin);
1249 (void) snprintf(buf, sizeof buf, "-%s", a);
1250 if (getpeername(s, (struct sockaddr *) &prt_sin, &size) == 0) {
1251 char *sa = inet_ntoa(prt_sin.sin_addr);
1253 buf[sizeof(buf) - 1 - strlen(sa) - 3] = '\0';
1258 strncpy(cp, buf, LastArg - cp);
1260 while (cp < LastArg)
1266 int inetd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1267 int inetd_main(int argc, char **argv)
1271 struct group *grp = NULL;
1273 struct sigaction sa, sapipe;
1278 sigset_t omask, wait_mask;
1279 #ifdef INETD_SETPROCTITLE
1285 #ifdef INETD_SETPROCTITLE
1288 if (envp == 0 || *envp == 0)
1292 LastArg = envp[-1] + strlen(envp[-1]);
1297 config_filename = NULL;
1299 opt = getopt32(argv, "R:f", &stoomany);
1301 toomany = xatoi_u(stoomany);
1305 config_filename = argv[0];
1306 if (config_filename == NULL)
1307 bb_error_msg_and_die("non-root must specify a config file");
1310 bb_daemonize_or_rexec(0, argv - optind);
1312 bb_sanitize_stdio();
1313 openlog(applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1314 logmode = LOGMODE_SYSLOG;
1317 /* If run by hand, ensure groups vector gets trashed */
1318 gid_t gid = getgid();
1322 write_pidfile(_PATH_INETDPID);
1324 if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
1325 bb_perror_msg("getrlimit");
1327 rlim_ofile_cur = rlim_ofile.rlim_cur;
1328 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1329 rlim_ofile_cur = OPEN_MAX;
1332 memset((char *) &sa, 0, sizeof(sa));
1333 sigemptyset(&sa.sa_mask);
1334 sigaddset(&sa.sa_mask, SIGALRM);
1335 sigaddset(&sa.sa_mask, SIGCHLD);
1336 sigaddset(&sa.sa_mask, SIGHUP);
1337 sa.sa_handler = retry;
1338 sigaction(SIGALRM, &sa, NULL);
1340 sa.sa_handler = config;
1341 sigaction(SIGHUP, &sa, NULL);
1342 sa.sa_handler = reapchild;
1343 sigaction(SIGCHLD, &sa, NULL);
1344 sa.sa_handler = goaway;
1345 sigaction(SIGTERM, &sa, NULL);
1346 sa.sa_handler = goaway;
1347 sigaction(SIGINT, &sa, NULL);
1348 sa.sa_handler = SIG_IGN;
1349 sigaction(SIGPIPE, &sa, &sapipe);
1350 memset(&wait_mask, 0, sizeof(wait_mask));
1352 /* space for daemons to overwrite environment for ps */
1353 #define DUMMYSIZE 100
1354 char dummy[DUMMYSIZE];
1356 (void) memset(dummy, 'x', DUMMYSIZE - 1);
1357 dummy[DUMMYSIZE - 1] = '\0';
1359 (void) setenv("inetd_dummy", dummy, 1);
1367 Block_Using_Signals(omask);
1369 sigsuspend(&wait_mask);
1370 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1374 n = select(maxsock + 1, &readable, NULL, NULL, NULL);
1376 if (n < 0 && errno != EINTR) {
1377 bb_perror_msg("select");
1383 for (sep = servtab; n && sep; sep = sep->se_next) {
1384 if (sep->se_fd == -1 || !FD_ISSET(sep->se_fd, &readable))
1388 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1389 ctrl = accept(sep->se_fd, NULL, NULL);
1393 bb_perror_msg("accept (for %s)", sep->se_service);
1396 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1397 struct sockaddr_in peer;
1398 socklen_t plen = sizeof(peer);
1400 if (getpeername(ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1401 bb_error_msg("cannot getpeername");
1405 if (ntohs(peer.sin_port) == 20) {
1406 /* XXX ftp bounce */
1414 Block_Using_Signals(omask);
1416 #ifdef INETD_FEATURE_ENABLED
1417 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1420 if (sep->se_count++ == 0)
1421 (void) gettimeofday(&sep->se_time, NULL);
1422 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1425 (void) gettimeofday(&now, NULL);
1426 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1430 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1432 if (sep->se_family == AF_INET &&
1433 ntohs(sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1435 * Cannot close it -- there are
1436 * thieves on the system.
1437 * Simply ignore the connection.
1442 bb_error_msg("%s/%s server failing (looping), service terminated",
1443 sep->se_service, sep->se_proto);
1444 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1446 FD_CLR(sep->se_fd, &allsock);
1447 (void) close(sep->se_fd);
1451 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1462 bb_perror_msg("fork");
1463 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1465 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1469 if (pid && sep->se_wait) {
1471 FD_CLR(sep->se_fd, &allsock);
1474 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1476 #ifdef INETD_FEATURE_ENABLED
1478 (*sep->se_bi->bi_fn)(ctrl, sep);
1482 pwd = getpwnam(sep->se_user);
1484 bb_error_msg("getpwnam: %s: no such user", sep->se_user);
1488 bb_perror_msg("%s: setsid", sep->se_service);
1489 if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) {
1490 bb_error_msg("getgrnam: %s: no such group", sep->se_group);
1494 /* a user running private inetd */
1495 if (uid != pwd->pw_uid)
1497 } else if (pwd->pw_uid) {
1499 pwd->pw_gid = grp->gr_gid;
1500 xsetgid((gid_t) pwd->pw_gid);
1501 initgroups(pwd->pw_name, pwd->pw_gid);
1502 xsetuid((uid_t) pwd->pw_uid);
1503 } else if (sep->se_group) {
1504 xsetgid(grp->gr_gid);
1505 setgroups(1, &grp->gr_gid);
1508 if (ctrl) close(ctrl);
1511 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1512 if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0)
1513 bb_perror_msg("setrlimit");
1515 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1516 (void) close(tmpint);
1517 sigaction(SIGPIPE, &sapipe, NULL);
1518 execv(sep->se_server, sep->se_argv);
1519 bb_perror_msg("execv %s", sep->se_server);
1521 if (sep->se_socktype != SOCK_STREAM)
1522 recv(0, buf, sizeof(buf), 0);
1526 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1528 } /* for (sep = servtab...) */
1533 * Internet services provided internally by inetd:
1535 #define BUFSIZE 4096
1537 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
1538 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN || \
1539 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1540 static int dg_badinput(struct sockaddr_in *dg_sin)
1542 if (ntohs(dg_sin->sin_port) < IPPORT_RESERVED)
1544 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST))
1546 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1551 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1552 /* Echo service -- echo data back */
1555 echo_stream(int s, servtab_t *sep)
1557 char buffer[BUFSIZE];
1560 inetd_setproctitle(sep->se_service, s);
1562 i = read(s, buffer, sizeof(buffer));
1564 /* FIXME: this isnt correct - safe_write()? */
1565 if (write(s, buffer, i) <= 0) break;
1570 /* Echo service -- echo data back */
1573 echo_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1575 char buffer[BUFSIZE];
1578 /* struct sockaddr_storage ss; */
1582 i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size);
1585 if (dg_badinput((struct sockaddr_in *) &sa))
1587 (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
1589 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1591 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1592 /* Discard service -- ignore data */
1595 discard_stream(int s, servtab_t *sep)
1597 char buffer[BUFSIZE];
1599 inetd_setproctitle(sep->se_service, s);
1601 if (safe_read(s, buffer, sizeof(buffer)) <= 0)
1606 /* Discard service -- ignore data */
1609 discard_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1611 char buffer[BUFSIZE];
1613 (void) read(s, buffer, sizeof(buffer));
1615 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1618 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1627 for (i = 0; i <= 128; ++i)
1632 /* Character generator */
1635 chargen_stream(int s, servtab_t *sep)
1639 char text[LINESIZ + 2];
1641 inetd_setproctitle(sep->se_service, s);
1648 text[LINESIZ] = '\r';
1649 text[LINESIZ + 1] = '\n';
1654 memmove(text, rs, LINESIZ);
1656 memmove(text, rs, len);
1657 memmove(text + len, ring, LINESIZ - len);
1659 if (++rs == endring)
1661 if (write(s, text, sizeof(text)) != sizeof(text))
1667 /* Character generator */
1670 chargen_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1672 /* struct sockaddr_storage ss; */
1675 char text[LINESIZ + 2];
1684 if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
1686 if (dg_badinput((struct sockaddr_in *) &sa))
1689 len = endring - ringpos;
1691 memmove(text, ringpos, LINESIZ);
1693 memmove(text, ringpos, len);
1694 memmove(text + len, ring, LINESIZ - len);
1696 if (++ringpos == endring)
1698 text[LINESIZ] = '\r';
1699 text[LINESIZ + 1] = '\n';
1700 (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
1702 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1705 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1707 * Return a machine readable date and time, in the form of the
1708 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1709 * returns the number of seconds since midnight, Jan 1, 1970,
1710 * we must add 2208988800 seconds to this figure to make up for
1711 * some seventy years Bell Labs was asleep.
1714 static unsigned machtime(void)
1718 if (gettimeofday(&tv, NULL) < 0) {
1719 fprintf(stderr, "Unable to get time of day\n");
1722 return htonl((unsigned) tv.tv_sec + 2208988800UL);
1727 machtime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1731 result = machtime();
1732 (void) write(s, (char *) &result, sizeof(result));
1737 machtime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1740 /* struct sockaddr_storage ss; */
1742 struct sockaddr_in *dg_sin;
1746 if (recvfrom(s, (char *) &result, sizeof(result), 0, &sa, &size) < 0)
1748 /* if (dg_badinput((struct sockaddr *)&ss)) */
1749 dg_sin = (struct sockaddr_in *) &sa;
1750 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST) ||
1751 ntohs(dg_sin->sin_port) < IPPORT_RESERVED / 2)
1753 result = machtime();
1754 (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
1756 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1759 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1760 /* Return human-readable time of day */
1762 static void daytime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1769 // fdprintf instead?
1770 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1771 (void) write(s, buffer, strlen(buffer));
1774 /* Return human-readable time of day */
1777 daytime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1781 /* struct sockaddr_storage ss; */
1788 if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
1790 if (dg_badinput((struct sockaddr_in *) &sa))
1792 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1793 (void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
1795 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */