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 int8_t socktype_t;
210 typedef int8_t family_t;
211 struct BUG_too_small {
212 char BUG_socktype_t_too_small[(0
217 | SOCK_RAW) <= 127 ? 1 : -1];
218 char BUG_family_t_too_small[(0
221 | AF_UNIX) <= 127 ? 1 : -1];
224 typedef struct servtab_t {
225 char *se_hostaddr; /* host address to listen on */
226 char *se_service; /* name of service */
227 char *se_proto; /* protocol used */
228 #if ENABLE_FEATURE_INETD_RPC
229 int se_rpcprog; /* rpc program number */
230 int se_rpcversl; /* rpc program lowest version */
231 int se_rpcversh; /* rpc program highest version */
232 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
234 #define isrpcservice(sep) 0
236 pid_t se_wait; /* single threaded server */
237 socktype_t se_socktype; /* type of socket to use */
238 family_t se_family; /* address family */
239 smallint se_checked; /* looked at during merge */
240 char *se_user; /* user name to run as */
241 char *se_group; /* group name to run as */
242 #ifdef INETD_FEATURE_ENABLED
243 const struct builtin *se_bi; /* if built-in, description */
245 char *se_server; /* server program */
247 char *se_argv[MAXARGV + 1]; /* program arguments */
248 int se_fd; /* open descriptor */
250 struct sockaddr se_un_ctrladdr;
251 struct sockaddr_in se_un_ctrladdr_in;
252 #if ENABLE_FEATURE_IPV6
253 struct sockaddr_in6 se_un_ctrladdr_in6;
255 struct sockaddr_un se_un_ctrladdr_un;
256 } se_un; /* bound address */
257 #define se_ctrladdr se_un.se_un_ctrladdr
258 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
259 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
260 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
261 int se_ctrladdr_size;
262 int se_max; /* max # of instances of this service */
263 int se_count; /* number started since se_time */
264 struct timeval se_time; /* start of se_count */
265 struct servtab_t *se_next;
268 #ifdef INETD_FEATURE_ENABLED
270 const char *bi_service; /* internally provided service name */
271 socktype_t bi_socktype; /* type of socket supported */
272 uint8_t bi_fork; /* 1 if should fork before call */
273 // Commented since it is always 0
274 // uint8_t bi_wait; /* 1 if should wait for child */
275 void (*bi_fn) (int, servtab_t *);
278 /* Echo received data */
279 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
280 static void echo_stream(int, servtab_t *);
281 static void echo_dg(int, servtab_t *);
283 /* Internet /dev/null */
284 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
285 static void discard_stream(int, servtab_t *);
286 static void discard_dg(int, servtab_t *);
288 /* Return 32 bit time since 1900 */
289 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
290 static void machtime_stream(int, servtab_t *);
291 static void machtime_dg(int, servtab_t *);
293 /* Return human-readable time */
294 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
295 static void daytime_stream(int, servtab_t *);
296 static void daytime_dg(int, servtab_t *);
298 /* Familiar character generator */
299 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
300 static void chargen_stream(int, servtab_t *);
301 static void chargen_dg(int, servtab_t *);
304 static const struct builtin builtins[] = {
305 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
306 /* Echo received data */
307 {"echo", SOCK_STREAM, 1, echo_stream,},
308 {"echo", SOCK_DGRAM, 0, echo_dg,},
310 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
311 /* Internet /dev/null */
312 {"discard", SOCK_STREAM, 1, discard_stream,},
313 {"discard", SOCK_DGRAM, 0, discard_dg,},
315 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
316 /* Return 32 bit time since 1900 */
317 {"time", SOCK_STREAM, 0, machtime_stream,},
318 {"time", SOCK_DGRAM, 0, machtime_dg,},
320 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
321 /* Return human-readable time */
322 {"daytime", SOCK_STREAM, 0, daytime_stream,},
323 {"daytime", SOCK_DGRAM, 0, daytime_dg,},
325 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
326 /* Familiar character generator */
327 {"chargen", SOCK_STREAM, 1, chargen_stream,},
328 {"chargen", SOCK_DGRAM, 0, chargen_dg,},
330 { /* zero filled */ }
332 #endif /* INETD_FEATURE_ENABLED */
335 rlim_t rlim_ofile_cur;
336 struct rlimit rlim_ofile;
345 const char *config_filename;
348 #ifdef INETD_SETPROCTITLE
352 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
358 /* Used only in nextline() */
359 char line[80]; /* at least 80, see LINE_SIZE */
361 #define G (*(struct globals*)&bb_common_bufsiz1)
362 enum { LINE_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line) };
363 struct BUG_G_too_big {
364 char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
366 #define rlim_ofile_cur (G.rlim_ofile_cur )
367 #define rlim_ofile (G.rlim_ofile )
368 #define servtab (G.servtab )
369 #define global_queuelen (G.global_queuelen)
370 #define nsock (G.nsock )
371 #define maxsock (G.maxsock )
372 #define toomany (G.toomany )
373 #define timingout (G.timingout )
376 #define config_filename (G.config_filename)
377 #define fconfig (G.fconfig )
378 #define defhost (G.defhost )
379 #define Argv (G.Argv )
380 #define LastArg (G.LastArg )
381 #define endring (G.endring )
382 #define ringpos (G.ringpos )
383 #define ring (G.ring )
384 #define allsock (G.allsock )
385 #define line (G.line )
386 #define INIT_G() do { \
387 rlim_ofile_cur = OPEN_MAX; \
388 global_queuelen = 128; \
389 config_filename = "/etc/inetd.conf"; \
392 /* xstrdup(NULL) returns NULL, but this one
393 * will return newly-allocated "" if called with NULL arg
394 * TODO: audit whether this makes any real difference
396 static char *xxstrdup(char *cp)
398 return xstrdup(cp ? cp : "");
401 static int setconfig(void)
404 defhost = xstrdup("*");
405 if (fconfig != NULL) {
406 fseek(fconfig, 0L, SEEK_SET);
409 fconfig = fopen(config_filename, "r");
410 return (fconfig != NULL);
413 static void endconfig(void)
416 (void) fclose(fconfig);
423 #if ENABLE_FEATURE_INETD_RPC
424 static void register_rpc(servtab_t *sep)
427 struct sockaddr_in ir_sin;
431 if ((pp = getprotobyname(sep->se_proto + 4)) == NULL) {
432 bb_perror_msg("%s: getproto", sep->se_proto);
435 size = sizeof ir_sin;
436 if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
437 bb_perror_msg("%s/%s: getsockname",
438 sep->se_service, sep->se_proto);
442 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
443 (void) pmap_unset(sep->se_rpcprog, n);
444 if (!pmap_set(sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port)))
445 bb_perror_msg("%s %s: pmap_set: %u %u %u %u",
446 sep->se_service, sep->se_proto,
447 sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port));
451 static void unregister_rpc(servtab_t *sep)
455 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
456 if (!pmap_unset(sep->se_rpcprog, n))
457 bb_error_msg("pmap_unset(%u, %u)", sep->se_rpcprog, n);
460 #endif /* FEATURE_INETD_RPC */
462 static void freeconfig(servtab_t *cp)
466 free(cp->se_hostaddr);
467 free(cp->se_service);
472 for (i = 0; i < MAXARGV; i++)
473 free(cp->se_argv[i]);
476 static int bump_nofile(void)
482 if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
483 bb_perror_msg("getrlimit");
486 rl.rlim_cur = MIN(rl.rlim_max, rl.rlim_cur + FD_CHUNK);
487 rl.rlim_cur = MIN(FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
488 if (rl.rlim_cur <= rlim_ofile_cur) {
489 bb_error_msg("bump_nofile: cannot extend file limit, max = %d",
494 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
495 bb_perror_msg("setrlimit");
499 rlim_ofile_cur = rl.rlim_cur;
503 static void setup(servtab_t *sep)
507 sep->se_fd = socket(sep->se_family, sep->se_socktype, 0);
508 if (sep->se_fd < 0) {
509 bb_perror_msg("%s/%s: socket", sep->se_service, sep->se_proto);
512 setsockopt_reuseaddr(sep->se_fd);
514 #if ENABLE_FEATURE_INETD_RPC
515 if (isrpcservice(sep)) {
519 * for RPC services, attempt to use a reserved port
520 * if they are going to be running as root.
522 * Also, zero out the port for all RPC services; let bind()
525 sep->se_ctrladdr_in.sin_port = 0;
526 if (sep->se_user && (pwd = getpwnam(sep->se_user)) &&
527 pwd->pw_uid == 0 && uid == 0)
528 r = bindresvport(sep->se_fd, &sep->se_ctrladdr_in);
530 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
532 socklen_t len = sep->se_ctrladdr_size;
533 int saveerrno = errno;
535 /* update se_ctrladdr_in.sin_port */
536 r = getsockname(sep->se_fd, &sep->se_ctrladdr, &len);
543 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
545 bb_perror_msg("%s/%s (%d): bind",
546 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
555 if (sep->se_socktype == SOCK_STREAM)
556 listen(sep->se_fd, global_queuelen);
558 FD_SET(sep->se_fd, &allsock);
560 if (sep->se_fd > maxsock) {
561 maxsock = sep->se_fd;
562 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
567 static char *nextline(void)
572 if (fgets(line, LINE_SIZE, fd) == NULL)
574 cp = strchr(line, '\n');
580 static char *skip(char **cpp) /* int report; */
588 /* bb_error_msg("syntax error in inetd config file"); */
593 while (*cp == ' ' || *cp == '\t')
600 if (c == ' ' || c == '\t') {
610 while (*cp && *cp != ' ' && *cp != '\t')
614 /* if ((*cpp = cp) == NULL) */
621 static servtab_t *new_servtab(void)
623 return xmalloc(sizeof(servtab_t));
626 static servtab_t *dupconfig(servtab_t *sep)
631 newtab = new_servtab();
632 memset(newtab, 0, sizeof(servtab_t));
633 newtab->se_service = xstrdup(sep->se_service);
634 newtab->se_socktype = sep->se_socktype;
635 newtab->se_family = sep->se_family;
636 newtab->se_proto = xstrdup(sep->se_proto);
637 #if ENABLE_FEATURE_INETD_RPC
638 newtab->se_rpcprog = sep->se_rpcprog;
639 newtab->se_rpcversl = sep->se_rpcversl;
640 newtab->se_rpcversh = sep->se_rpcversh;
642 newtab->se_wait = sep->se_wait;
643 newtab->se_user = xstrdup(sep->se_user);
644 newtab->se_group = xstrdup(sep->se_group);
645 #ifdef INETD_FEATURE_ENABLED
646 newtab->se_bi = sep->se_bi;
648 newtab->se_server = xstrdup(sep->se_server);
650 for (argc = 0; argc <= MAXARGV; argc++)
651 newtab->se_argv[argc] = xstrdup(sep->se_argv[argc]);
652 newtab->se_max = sep->se_max;
657 static servtab_t *getconfigent(void)
668 /* memset(sep, 0, sizeof *sep); */
670 /* freeconfig(sep); */
672 while ((cp = nextline()) && *cp == '#') /* skip comment line */;
678 memset((char *) sep, 0, sizeof *sep);
685 /* Check for a host name. */
686 hostdelim = strrchr(arg, ':');
689 sep->se_hostaddr = xstrdup(arg);
692 * If the line is of the form `host:', then just change the
693 * default host for the following lines.
699 defhost = sep->se_hostaddr;
704 sep->se_hostaddr = xxstrdup(defhost);
706 sep->se_service = xxstrdup(arg);
709 if (strcmp(arg, "stream") == 0)
710 sep->se_socktype = SOCK_STREAM;
711 else if (strcmp(arg, "dgram") == 0)
712 sep->se_socktype = SOCK_DGRAM;
713 else if (strcmp(arg, "rdm") == 0)
714 sep->se_socktype = SOCK_RDM;
715 else if (strcmp(arg, "seqpacket") == 0)
716 sep->se_socktype = SOCK_SEQPACKET;
717 else if (strcmp(arg, "raw") == 0)
718 sep->se_socktype = SOCK_RAW;
720 sep->se_socktype = -1;
722 sep->se_proto = xxstrdup(skip(&cp));
724 if (strcmp(sep->se_proto, "unix") == 0) {
725 sep->se_family = AF_UNIX;
727 sep->se_family = AF_INET;
728 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6')
729 #if ENABLE_FEATURE_IPV6
730 sep->se_family = AF_INET6;
732 bb_error_msg("%s: IPV6 not supported", sep->se_proto);
734 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
735 #if ENABLE_FEATURE_INETD_RPC
739 p = strchr(sep->se_service, '/');
741 bb_error_msg("%s: no rpc version", sep->se_service);
745 l = strtol(p, &ccp, 0);
746 if (ccp == p || l < 0 || l > INT_MAX) {
748 bb_error_msg("%s/%s: bad rpc version", sep->se_service, p);
751 sep->se_rpcversl = sep->se_rpcversh = l;
754 l = strtol(p, &ccp, 0);
755 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
757 sep->se_rpcversh = l;
758 } else if (*ccp != '\0')
761 bb_error_msg("%s: rpc services not supported", sep->se_service);
770 char *s = strchr(arg, '.');
773 sep->se_max = xatoi(s);
775 sep->se_max = toomany;
777 sep->se_wait = strcmp(arg, "wait") == 0;
778 /* if ((arg = skip(&cp, 1)) == NULL) */
780 sep->se_user = xxstrdup(skip(&cp));
781 arg = strchr(sep->se_user, '.');
783 arg = strchr(sep->se_user, ':');
786 sep->se_group = xstrdup(arg);
788 /* if ((arg = skip(&cp, 1)) == NULL) */
791 sep->se_server = xxstrdup(skip(&cp));
792 if (strcmp(sep->se_server, "internal") == 0) {
793 #ifdef INETD_FEATURE_ENABLED
794 const struct builtin *bi;
796 for (bi = builtins; bi->bi_service; bi++)
797 if (bi->bi_socktype == sep->se_socktype
798 && strcmp(bi->bi_service, sep->se_service) == 0)
800 if (bi->bi_service == 0) {
801 bb_error_msg("internal service %s unknown", sep->se_service);
805 sep->se_wait = 0; /* = bi->bi_wait; - always 0 */
807 bb_perror_msg("internal service %s unknown", sep->se_service);
811 #ifdef INETD_FEATURE_ENABLED
816 for (arg = skip(&cp); cp; arg = skip(&cp)) {
818 sep->se_argv[argc++] = xxstrdup(arg);
820 while (argc <= MAXARGV)
821 sep->se_argv[argc++] = NULL;
824 * Now that we've processed the entire line, check if the hostname
825 * specifier was a comma separated list of hostnames. If so
826 * we'll make new entries for each address.
828 while ((hostdelim = strrchr(sep->se_hostaddr, ',')) != NULL) {
829 nsep = dupconfig(sep);
832 * NULL terminate the hostname field of the existing entry,
833 * and make a dup for the new entry.
836 nsep->se_hostaddr = xstrdup(hostdelim);
838 nsep->se_next = sep->se_next;
843 while (nsep != NULL) {
844 nsep->se_checked = 1;
845 if (nsep->se_family == AF_INET) {
846 if (LONE_CHAR(nsep->se_hostaddr, '*'))
847 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
848 else if (!inet_aton(nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
852 hp = gethostbyname(nsep->se_hostaddr);
854 bb_error_msg("%s: unknown host", nsep->se_hostaddr);
855 nsep->se_checked = 0;
858 if (hp->h_addrtype != AF_INET) {
859 bb_error_msg("%s: address isn't an Internet "
860 "address", nsep->se_hostaddr);
861 nsep->se_checked = 0;
865 memmove(&nsep->se_ctrladdr_in.sin_addr,
866 hp->h_addr_list[0], sizeof(struct in_addr));
867 while (hp->h_addr_list[i] != NULL) {
868 psep = dupconfig(nsep);
869 psep->se_hostaddr = xxstrdup(nsep->se_hostaddr);
870 psep->se_checked = 1;
871 memmove(&psep->se_ctrladdr_in.sin_addr,
872 hp->h_addr_list[i], sizeof(struct in_addr));
873 psep->se_ctrladdr_size = sizeof(psep->se_ctrladdr_in);
875 /* Prepend to list, don't want to look up */
876 /* its hostname again. */
882 /* XXX BUG?: is this skip: label supposed to remain? */
884 nsep = nsep->se_next;
888 * Finally, free any entries which failed the gethostbyname
893 while (nsep != NULL) {
896 if (nsep->se_checked == 0) {
902 nsep = nsep->se_next;
903 psep->se_next = nsep;
907 nsep->se_checked = 0;
909 nsep = nsep->se_next;
916 #define Block_Using_Signals(m) do { \
918 sigaddset(&m, SIGCHLD); \
919 sigaddset(&m, SIGHUP); \
920 sigaddset(&m, SIGALRM); \
921 sigprocmask(SIG_BLOCK, &m, NULL); \
924 static servtab_t *enter(servtab_t *cp)
932 #if ENABLE_FEATURE_INETD_RPC
933 sep->se_rpcprog = -1;
935 Block_Using_Signals(omask);
936 sep->se_next = servtab;
938 sigprocmask(SIG_UNBLOCK, &omask, NULL);
942 static int matchconf(servtab_t *old, servtab_t *new)
944 if (strcmp(old->se_service, new->se_service) != 0)
947 if (strcmp(old->se_hostaddr, new->se_hostaddr) != 0)
950 if (strcmp(old->se_proto, new->se_proto) != 0)
954 * If the new servtab is bound to a specific address, check that the
955 * old servtab is bound to the same entry. If the new service is not
956 * bound to a specific address then the check of se_hostaddr above
960 if (old->se_family == AF_INET && new->se_family == AF_INET &&
961 memcmp(&old->se_ctrladdr_in.sin_addr,
962 &new->se_ctrladdr_in.sin_addr,
963 sizeof(new->se_ctrladdr_in.sin_addr)) != 0)
966 #if ENABLE_FEATURE_IPV6
967 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
968 memcmp(&old->se_ctrladdr_in6.sin6_addr,
969 &new->se_ctrladdr_in6.sin6_addr,
970 sizeof(new->se_ctrladdr_in6.sin6_addr)) != 0)
976 static void config(int sig ATTRIBUTE_UNUSED)
978 servtab_t *sep, *cp, **sepp;
984 bb_perror_msg("%s", config_filename);
987 for (sep = servtab; sep; sep = sep->se_next)
991 for (sep = servtab; sep; sep = sep->se_next)
992 if (matchconf(sep, cp))
998 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
1000 Block_Using_Signals(omask);
1002 * sep->se_wait may be holding the pid of a daemon
1003 * that we're waiting for. If so, don't overwrite
1004 * it unless the config file explicitly says don't
1008 #ifdef INETD_FEATURE_ENABLED
1011 (sep->se_wait == 1 || cp->se_wait == 0))
1012 sep->se_wait = cp->se_wait;
1013 SWAP(int, cp->se_max, sep->se_max);
1014 SWAP(char *, sep->se_user, cp->se_user);
1015 SWAP(char *, sep->se_group, cp->se_group);
1016 SWAP(char *, sep->se_server, cp->se_server);
1017 for (i = 0; i < MAXARGV; i++)
1018 SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
1021 #if ENABLE_FEATURE_INETD_RPC
1022 if (isrpcservice(sep))
1023 unregister_rpc(sep);
1024 sep->se_rpcversl = cp->se_rpcversl;
1025 sep->se_rpcversh = cp->se_rpcversh;
1027 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1032 sep->se_checked = 1;
1034 switch (sep->se_family) {
1036 if (sep->se_fd != -1)
1038 (void) unlink(sep->se_service);
1039 n = strlen(sep->se_service);
1040 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
1041 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
1042 safe_strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
1043 sep->se_ctrladdr_un.sun_family = AF_UNIX;
1044 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
1048 sep->se_ctrladdr_in.sin_family = AF_INET;
1049 /* se_ctrladdr_in was set in getconfigent */
1050 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
1052 #if ENABLE_FEATURE_INETD_RPC
1053 if (isrpcservice(sep)) {
1055 // FIXME: atoi_or_else(str, 0) would be handy here
1056 sep->se_rpcprog = atoi(sep->se_service);
1057 if (sep->se_rpcprog == 0) {
1058 rp = getrpcbyname(sep->se_service);
1060 bb_error_msg("%s: unknown rpc service", sep->se_service);
1063 sep->se_rpcprog = rp->r_number;
1065 if (sep->se_fd == -1)
1067 if (sep->se_fd != -1)
1072 uint16_t port = htons(atoi(sep->se_service));
1073 // FIXME: atoi_or_else(str, 0) would be handy here
1075 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1076 if (isdigit(protoname[strlen(protoname) - 1]))
1077 protoname[strlen(protoname) - 1] = '\0';
1078 sp = getservbyname(sep->se_service, protoname);
1080 bb_error_msg("%s/%s: unknown service",
1081 sep->se_service, sep->se_proto);
1086 if (port != sep->se_ctrladdr_in.sin_port) {
1087 sep->se_ctrladdr_in.sin_port = port;
1088 if (sep->se_fd != -1) {
1089 FD_CLR(sep->se_fd, &allsock);
1091 (void) close(sep->se_fd);
1095 if (sep->se_fd == -1)
1099 #if ENABLE_FEATURE_IPV6
1101 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1102 /* se_ctrladdr_in was set in getconfigent */
1103 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1105 #if ENABLE_FEATURE_INETD_RPC
1106 if (isrpcservice(sep)) {
1109 sep->se_rpcprog = atoi(sep->se_service);
1110 if (sep->se_rpcprog == 0) {
1111 rp = getrpcbyname(sep->se_service);
1113 bb_error_msg("%s: unknown rpc service", sep->se_service);
1116 sep->se_rpcprog = rp->r_number;
1118 if (sep->se_fd == -1)
1120 if (sep->se_fd != -1)
1125 uint16_t port = htons(atoi(sep->se_service));
1128 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1129 if (isdigit(protoname[strlen(protoname) - 1]))
1130 protoname[strlen(protoname) - 1] = '\0';
1131 sp = getservbyname(sep->se_service, protoname);
1133 bb_error_msg("%s/%s: unknown service",
1134 sep->se_service, sep->se_proto);
1139 if (port != sep->se_ctrladdr_in6.sin6_port) {
1140 sep->se_ctrladdr_in6.sin6_port = port;
1141 if (sep->se_fd != -1) {
1142 FD_CLR(sep->se_fd, &allsock);
1144 (void) close(sep->se_fd);
1148 if (sep->se_fd == -1)
1152 #endif /* FEATURE_IPV6 */
1155 if (cp->se_next != NULL) {
1156 servtab_t *tmp = cp;
1162 cp = getconfigent();
1167 * Purge anything not looked at above.
1169 Block_Using_Signals(omask);
1171 while ((sep = *sepp)) {
1172 if (sep->se_checked) {
1173 sepp = &sep->se_next;
1176 *sepp = sep->se_next;
1177 if (sep->se_fd != -1) {
1178 FD_CLR(sep->se_fd, &allsock);
1180 (void) close(sep->se_fd);
1182 #if ENABLE_FEATURE_INETD_RPC
1183 if (isrpcservice(sep))
1184 unregister_rpc(sep);
1186 if (sep->se_family == AF_UNIX)
1187 (void) unlink(sep->se_service);
1191 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1195 static void reapchild(int sig ATTRIBUTE_UNUSED)
1198 int save_errno = errno, status;
1202 pid = wait3(&status, WNOHANG, NULL);
1205 for (sep = servtab; sep; sep = sep->se_next)
1206 if (sep->se_wait == pid) {
1207 if (WIFEXITED(status) && WEXITSTATUS(status))
1208 bb_error_msg("%s: exit status 0x%x",
1209 sep->se_server, WEXITSTATUS(status));
1210 else if (WIFSIGNALED(status))
1211 bb_error_msg("%s: exit signal 0x%x",
1212 sep->se_server, WTERMSIG(status));
1214 FD_SET(sep->se_fd, &allsock);
1221 static void retry(int sig ATTRIBUTE_UNUSED)
1226 for (sep = servtab; sep; sep = sep->se_next) {
1227 if (sep->se_fd == -1) {
1228 switch (sep->se_family) {
1231 #if ENABLE_FEATURE_IPV6
1235 #if ENABLE_FEATURE_INETD_RPC
1236 if (sep->se_fd != -1 && isrpcservice(sep))
1245 static void goaway(int sig ATTRIBUTE_UNUSED)
1249 /* XXX signal race walking sep list */
1250 for (sep = servtab; sep; sep = sep->se_next) {
1251 if (sep->se_fd == -1)
1254 switch (sep->se_family) {
1256 (void) unlink(sep->se_service);
1259 #if ENABLE_FEATURE_IPV6
1262 #if ENABLE_FEATURE_INETD_RPC
1263 if (sep->se_wait == 1 && isrpcservice(sep))
1264 unregister_rpc(sep); /* XXX signal race */
1268 (void) close(sep->se_fd);
1270 remove_pidfile(_PATH_INETDPID);
1275 #ifdef INETD_SETPROCTITLE
1278 inetd_setproctitle(char *a, int s)
1282 struct sockaddr_in prt_sin;
1286 size = sizeof(prt_sin);
1287 (void) snprintf(buf, sizeof buf, "-%s", a);
1288 if (getpeername(s, (struct sockaddr *) &prt_sin, &size) == 0) {
1289 char *sa = inet_ntoa(prt_sin.sin_addr);
1291 buf[sizeof(buf) - 1 - strlen(sa) - 3] = '\0';
1296 strncpy(cp, buf, LastArg - cp);
1298 while (cp < LastArg)
1304 int inetd_main(int argc, char **argv);
1305 int inetd_main(int argc, char **argv)
1309 struct group *grp = NULL;
1311 struct sigaction sa, sapipe;
1316 sigset_t omask, wait_mask;
1317 #ifdef INETD_SETPROCTITLE
1323 #ifdef INETD_SETPROCTITLE
1326 if (envp == 0 || *envp == 0)
1330 LastArg = envp[-1] + strlen(envp[-1]);
1335 config_filename = NULL;
1337 opt = getopt32(argv, "R:f", &stoomany);
1339 toomany = xatoi_u(stoomany);
1343 config_filename = argv[0];
1344 if (config_filename == NULL)
1345 bb_error_msg_and_die("non-root must specify a config file");
1348 bb_daemonize_or_rexec(0, argv - optind);
1350 bb_sanitize_stdio();
1351 openlog(applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1352 logmode = LOGMODE_SYSLOG;
1355 /* If run by hand, ensure groups vector gets trashed */
1356 gid_t gid = getgid();
1360 write_pidfile(_PATH_INETDPID);
1362 if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
1363 bb_perror_msg("getrlimit");
1365 rlim_ofile_cur = rlim_ofile.rlim_cur;
1366 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1367 rlim_ofile_cur = OPEN_MAX;
1370 memset((char *) &sa, 0, sizeof(sa));
1371 sigemptyset(&sa.sa_mask);
1372 sigaddset(&sa.sa_mask, SIGALRM);
1373 sigaddset(&sa.sa_mask, SIGCHLD);
1374 sigaddset(&sa.sa_mask, SIGHUP);
1375 sa.sa_handler = retry;
1376 sigaction(SIGALRM, &sa, NULL);
1378 sa.sa_handler = config;
1379 sigaction(SIGHUP, &sa, NULL);
1380 sa.sa_handler = reapchild;
1381 sigaction(SIGCHLD, &sa, NULL);
1382 sa.sa_handler = goaway;
1383 sigaction(SIGTERM, &sa, NULL);
1384 sa.sa_handler = goaway;
1385 sigaction(SIGINT, &sa, NULL);
1386 sa.sa_handler = SIG_IGN;
1387 sigaction(SIGPIPE, &sa, &sapipe);
1388 memset(&wait_mask, 0, sizeof(wait_mask));
1390 /* space for daemons to overwrite environment for ps */
1391 #define DUMMYSIZE 100
1392 char dummy[DUMMYSIZE];
1394 (void) memset(dummy, 'x', DUMMYSIZE - 1);
1395 dummy[DUMMYSIZE - 1] = '\0';
1397 (void) setenv("inetd_dummy", dummy, 1);
1405 Block_Using_Signals(omask);
1407 sigsuspend(&wait_mask);
1408 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1412 n = select(maxsock + 1, &readable, NULL, NULL, NULL);
1414 if (n < 0 && errno != EINTR) {
1415 bb_perror_msg("select");
1421 for (sep = servtab; n && sep; sep = sep->se_next) {
1422 if (sep->se_fd == -1 || !FD_ISSET(sep->se_fd, &readable))
1426 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1427 ctrl = accept(sep->se_fd, NULL, NULL);
1431 bb_perror_msg("accept (for %s)", sep->se_service);
1434 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1435 struct sockaddr_in peer;
1436 socklen_t plen = sizeof(peer);
1438 if (getpeername(ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1439 bb_error_msg("cannot getpeername");
1443 if (ntohs(peer.sin_port) == 20) {
1444 /* XXX ftp bounce */
1452 Block_Using_Signals(omask);
1454 #ifdef INETD_FEATURE_ENABLED
1455 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1458 if (sep->se_count++ == 0)
1459 (void) gettimeofday(&sep->se_time, NULL);
1460 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1463 (void) gettimeofday(&now, NULL);
1464 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1468 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1470 if (sep->se_family == AF_INET &&
1471 ntohs(sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1473 * Cannot close it -- there are
1474 * thieves on the system.
1475 * Simply ignore the connection.
1480 bb_error_msg("%s/%s server failing (looping), service terminated",
1481 sep->se_service, sep->se_proto);
1482 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1484 FD_CLR(sep->se_fd, &allsock);
1485 (void) close(sep->se_fd);
1489 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1500 bb_perror_msg("fork");
1501 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1503 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1507 if (pid && sep->se_wait) {
1509 FD_CLR(sep->se_fd, &allsock);
1512 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1514 #ifdef INETD_FEATURE_ENABLED
1516 (*sep->se_bi->bi_fn)(ctrl, sep);
1520 pwd = getpwnam(sep->se_user);
1522 bb_error_msg("getpwnam: %s: no such user", sep->se_user);
1526 bb_perror_msg("%s: setsid", sep->se_service);
1527 if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) {
1528 bb_error_msg("getgrnam: %s: no such group", sep->se_group);
1532 /* a user running private inetd */
1533 if (uid != pwd->pw_uid)
1535 } else if (pwd->pw_uid) {
1537 pwd->pw_gid = grp->gr_gid;
1538 xsetgid((gid_t) pwd->pw_gid);
1539 initgroups(pwd->pw_name, pwd->pw_gid);
1540 xsetuid((uid_t) pwd->pw_uid);
1541 } else if (sep->se_group) {
1542 xsetgid(grp->gr_gid);
1543 setgroups(1, &grp->gr_gid);
1546 if (ctrl) close(ctrl);
1549 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1550 if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0)
1551 bb_perror_msg("setrlimit");
1553 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1554 (void) close(tmpint);
1555 sigaction(SIGPIPE, &sapipe, NULL);
1556 execv(sep->se_server, sep->se_argv);
1557 bb_perror_msg("execv %s", sep->se_server);
1559 if (sep->se_socktype != SOCK_STREAM)
1560 recv(0, buf, sizeof(buf), 0);
1564 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1566 } /* for (sep = servtab...) */
1571 * Internet services provided internally by inetd:
1573 #define BUFSIZE 4096
1575 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
1576 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN || \
1577 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1578 static int dg_badinput(struct sockaddr_in *dg_sin)
1580 if (ntohs(dg_sin->sin_port) < IPPORT_RESERVED)
1582 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST))
1584 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1589 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1590 /* Echo service -- echo data back */
1593 echo_stream(int s, servtab_t *sep)
1595 char buffer[BUFSIZE];
1598 inetd_setproctitle(sep->se_service, s);
1600 i = read(s, buffer, sizeof(buffer));
1602 /* FIXME: this isnt correct - safe_write()? */
1603 if (write(s, buffer, i) <= 0) break;
1608 /* Echo service -- echo data back */
1611 echo_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1613 char buffer[BUFSIZE];
1616 /* struct sockaddr_storage ss; */
1620 i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size);
1623 if (dg_badinput((struct sockaddr_in *) &sa))
1625 (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
1627 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1629 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1630 /* Discard service -- ignore data */
1633 discard_stream(int s, servtab_t *sep)
1635 char buffer[BUFSIZE];
1637 inetd_setproctitle(sep->se_service, s);
1640 if (read(s, buffer, sizeof(buffer)) <= 0 && errno != EINTR)
1645 /* Discard service -- ignore data */
1648 discard_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1650 char buffer[BUFSIZE];
1652 (void) read(s, buffer, sizeof(buffer));
1654 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1657 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1666 for (i = 0; i <= 128; ++i)
1671 /* Character generator */
1674 chargen_stream(int s, servtab_t *sep)
1678 char text[LINESIZ + 2];
1680 inetd_setproctitle(sep->se_service, s);
1687 text[LINESIZ] = '\r';
1688 text[LINESIZ + 1] = '\n';
1693 memmove(text, rs, LINESIZ);
1695 memmove(text, rs, len);
1696 memmove(text + len, ring, LINESIZ - len);
1698 if (++rs == endring)
1700 if (write(s, text, sizeof(text)) != sizeof(text))
1706 /* Character generator */
1709 chargen_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1711 /* struct sockaddr_storage ss; */
1714 char text[LINESIZ + 2];
1723 if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
1725 if (dg_badinput((struct sockaddr_in *) &sa))
1728 len = endring - ringpos;
1730 memmove(text, ringpos, LINESIZ);
1732 memmove(text, ringpos, len);
1733 memmove(text + len, ring, LINESIZ - len);
1735 if (++ringpos == endring)
1737 text[LINESIZ] = '\r';
1738 text[LINESIZ + 1] = '\n';
1739 (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
1741 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1744 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1746 * Return a machine readable date and time, in the form of the
1747 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1748 * returns the number of seconds since midnight, Jan 1, 1970,
1749 * we must add 2208988800 seconds to this figure to make up for
1750 * some seventy years Bell Labs was asleep.
1753 static unsigned machtime(void)
1757 if (gettimeofday(&tv, NULL) < 0) {
1758 fprintf(stderr, "Unable to get time of day\n");
1761 return htonl((unsigned) tv.tv_sec + 2208988800UL);
1766 machtime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1770 result = machtime();
1771 (void) write(s, (char *) &result, sizeof(result));
1776 machtime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1779 /* struct sockaddr_storage ss; */
1781 struct sockaddr_in *dg_sin;
1785 if (recvfrom(s, (char *) &result, sizeof(result), 0, &sa, &size) < 0)
1787 /* if (dg_badinput((struct sockaddr *)&ss)) */
1788 dg_sin = (struct sockaddr_in *) &sa;
1789 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST) ||
1790 ntohs(dg_sin->sin_port) < IPPORT_RESERVED / 2)
1792 result = machtime();
1793 (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
1795 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1798 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1799 /* Return human-readable time of day */
1801 static void daytime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1808 // fdprintf instead?
1809 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1810 (void) write(s, buffer, strlen(buffer));
1813 /* Return human-readable time of day */
1816 daytime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1820 /* struct sockaddr_storage ss; */
1827 if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
1829 if (dg_badinput((struct sockaddr_in *) &sa))
1831 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1832 (void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
1834 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */