+/* $Slackware: inetd.c 1.79s 2001/02/06 13:18:00 volkerdi Exp $ */
+/* $OpenBSD: inetd.c,v 1.79 2001/01/30 08:30:57 deraadt Exp $ */
+/* $NetBSD: inetd.c,v 1.11 1996/02/22 11:14:41 mycroft Exp $ */
+/* Busybox port by Vladimir Oleynik (C) 2001-2005 <dzo@simtreas.ru> */
/*
* Copyright (c) 1983,1991 The Regents of the University of California.
* All rights reserved.
*
- * This code is derived from software contributed to Berkeley by
- * David A. Holland.
- *
- * Busybox port by Vladimir Oleynik (C) 2001-2003 <dzo@simtreas.ru>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
*/
/*
* Inetd uses a configuration file which is read at startup
* and, possibly, at some later time in response to a hangup signal.
* The configuration file is ``free format'' with fields given in the
- * order shown below. Continuation lines for an entry must being with
+ * order shown below. Continuation lines for an entry must begin with
* a space or tab. All fields must be present in each entry.
*
* service name must be in /etc/services
* socket type stream/dgram/raw/rdm/seqpacket
* protocol must be in /etc/protocols
* wait/nowait[.max] single-threaded/multi-threaded, max #
- * user[.group] user/group to run daemon as
+ * user[.group] or user[:group] user/group to run daemon as
+ * server program full path name
+ * server program arguments maximum of MAXARGS (20)
+ *
+ * For RPC services
+ * service name/version must be in /etc/rpc
+ * socket type stream/dgram/raw/rdm/seqpacket
+ * protocol must be in /etc/protocols
+ * wait/nowait[.max] single-threaded/multi-threaded
+ * user[.group] or user[:group] user to run daemon as
* server program full path name
* server program arguments maximum of MAXARGS (20)
*
- * RPC services unsupported
+ * For non-RPC services, the "service name" can be of the form
+ * hostaddress:servicename, in which case the hostaddress is used
+ * as the host portion of the address to listen on. If hostaddress
+ * consists of a single `*' character, INADDR_ANY is used.
+ *
+ * A line can also consist of just
+ * hostaddress:
+ * where hostaddress is as in the preceding paragraph. Such a line must
+ * have no further fields; the specified hostaddress is remembered and
+ * used for all further lines that have no hostaddress specified,
+ * until the next such line (or EOF). (This is why * is provided to
+ * allow explicit specification of INADDR_ANY.) A line
+ * *:
+ * is implicitly in effect at the beginning of the file.
+ *
+ * The hostaddress specifier may (and often will) contain dots;
+ * the service name must not.
+ *
+ * For RPC services, host-address specifiers are accepted and will
+ * work to some extent; however, because of limitations in the
+ * portmapper interface, it will not work to try to give more than
+ * one line for any given RPC service, even if the host-address
+ * specifiers are different.
*
* Comment lines are indicated by a `#' in column 1.
*/
/*
- * Here's the scoop concerning the user.group feature:
+ * Here's the scoop concerning the user[.:]group feature:
*
- * 1) No group listed.
+ * 1) set-group-option off.
*
- * a) for root: NO setuid() or setgid() is done
+ * a) user = root: NO setuid() or setgid() is done
*
- * b) nonroot: setuid()
- * setgid(primary group as found in passwd)
+ * b) other: setgid(primary group as found in passwd)
* initgroups(name, primary group)
+ * setuid()
*
* 2) set-group-option on.
*
- * a) for root: NO setuid()
- * setgid(specified group)
- * setgroups(1, specified group)
+ * a) user = root: setgid(specified group)
+ * NO initgroups()
+ * NO setuid()
*
- * b) nonroot: setuid()
- * setgid(specified group)
+ * b) other: setgid(specified group)
* initgroups(name, specified group)
+ * setuid()
*
- * All supplementary groups are discarded at startup in case inetd was
- * run manually.
*/
-#define __USE_BSD_SIGNAL
-
-#include "busybox.h"
-
-
-#ifndef __linux__
-#ifndef RLIMIT_NOFILE
-#define RLIMIT_NOFILE RLIMIT_OFILE
-#endif
-#endif
-
-#include <sys/file.h>
-#include <sys/ioctl.h>
#include <sys/param.h>
-#include <sys/resource.h>
-#include <sys/socket.h>
#include <sys/stat.h>
-#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
#include <sys/un.h>
+#include <sys/file.h>
#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
#include <netinet/in.h>
-#include <netinet/ip.h>
#include <arpa/inet.h>
#include <errno.h>
#include <syslog.h>
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
-#include <getopt.h>
#include <unistd.h>
-#include <stdarg.h>
+#include <string.h>
+#include <ctype.h>
#include <time.h>
-#ifndef OPEN_MAX
-#define OPEN_MAX 64
+#include "busybox.h"
+
+//#define CONFIG_FEATURE_INETD_RPC
+//#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
+//#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
+//#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
+//#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
+//#define CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+//#define CONFIG_FEATURE_IPV6
+
+#ifdef CONFIG_FEATURE_INETD_RPC
+#include <rpc/rpc.h>
+#include <rpc/pmap_clnt.h>
+#include <rpcsvc/nfs_prot.h>
#endif
#define _PATH_INETDCONF "/etc/inetd.conf"
#define _PATH_INETDPID "/var/run/inetd.pid"
-#define TOOMANY 40 /* don't start more than TOOMANY */
-#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
-#define RETRYTIME (60*10) /* retry after bind or server fail */
-#define MAXARGV 20
-#define se_ctrladdr se_un.se_un_ctrladdr
-#define se_ctrladdr_in se_un.se_un_ctrladdr_in
-#define se_ctrladdr_un se_un.se_un_ctrladdr_un
+#define TOOMANY 0 /* don't start more than TOOMANY */
+
+#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
+#define RETRYTIME (60*10) /* retry after bind or server fail */
+
+#define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))
+
+#ifndef RLIMIT_NOFILE
+#define RLIMIT_NOFILE RLIMIT_OFILE
+#endif
+
+#ifndef OPEN_MAX
+#define OPEN_MAX 64
+#endif
/* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
-#define FD_MARGIN (8)
+#define FD_MARGIN (8)
+static rlim_t rlim_ofile_cur = OPEN_MAX;
+static struct rlimit rlim_ofile;
+
/* Check unsupporting builtin */
#if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
# define INETD_FEATURE_ENABLED
#endif
-typedef struct servtab_s {
- char *se_service; /* name of service */
- int se_socktype; /* type of socket to use */
- int se_family; /* address family */
- char *se_proto; /* protocol used */
- short se_wait; /* single threaded server */
- short se_checked; /* looked at during merge */
- char *se_user; /* user name to run as */
- char *se_group; /* group name to run as */
+#if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \
+ defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD || \
+ defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+# define INETD_SETPROCTITLE
+#endif
+
+typedef struct servtab
+{
+ char *se_hostaddr; /* host address to listen on */
+ char *se_service; /* name of service */
+ int se_socktype; /* type of socket to use */
+ int se_family; /* address family */
+ char *se_proto; /* protocol used */
+#ifdef CONFIG_FEATURE_INETD_RPC
+ int se_rpcprog; /* rpc program number */
+ int se_rpcversl; /* rpc program lowest version */
+ int se_rpcversh; /* rpc program highest version */
+#define isrpcservice(sep) ((sep)->se_rpcversl != 0)
+#else
+#define isrpcservice(sep) 0
+#endif
+ pid_t se_wait; /* single threaded server */
+ short se_checked; /* looked at during merge */
+ char *se_user; /* user name to run as */
+ char *se_group; /* group name to run as */
#ifdef INETD_FEATURE_ENABLED
- const struct biltin *se_bi; /* if built-in, description */
+ const struct biltin *se_bi; /* if built-in, description */
#endif
- char *se_server; /* server program */
- char *se_argv[MAXARGV+1]; /* program arguments */
- int se_fd; /* open descriptor */
- union {
- struct sockaddr se_un_ctrladdr;
- struct sockaddr_in se_un_ctrladdr_in;
- struct sockaddr_un se_un_ctrladdr_un;
- } se_un; /* bound address */
- int se_ctrladdr_size;
- int se_max; /* max # of instances of this service */
- int se_count; /* number started since se_time */
- struct timeval se_time; /* start of se_count */
- struct servtab_s *se_next;
+ char *se_server; /* server program */
+#define MAXARGV 20
+ char *se_argv[MAXARGV + 1]; /* program arguments */
+ int se_fd; /* open descriptor */
+ union
+ {
+ struct sockaddr se_un_ctrladdr;
+ struct sockaddr_in se_un_ctrladdr_in;
+#ifdef CONFIG_FEATURE_IPV6
+ struct sockaddr_in6 se_un_ctrladdr_in6;
+#endif
+ struct sockaddr_un se_un_ctrladdr_un;
+ } se_un; /* bound address */
+#define se_ctrladdr se_un.se_un_ctrladdr
+#define se_ctrladdr_in se_un.se_un_ctrladdr_in
+#define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
+#define se_ctrladdr_un se_un.se_un_ctrladdr_un
+ int se_ctrladdr_size;
+ int se_max; /* max # of instances of this service */
+ int se_count; /* number started since se_time */
+ struct timeval se_time; /* start of se_count */
+ struct servtab *se_next;
} servtab_t;
static servtab_t *servtab;
#ifdef INETD_FEATURE_ENABLED
-struct biltin {
- const char *bi_service; /* internally provided service name */
- int bi_socktype; /* type of socket supported */
- short bi_fork; /* 1 if should fork before call */
- short bi_wait; /* 1 if should wait for child */
- void (*bi_fn)(int, servtab_t *); /* fn which performs it */
+struct biltin
+{
+ const char *bi_service; /* internally provided service name */
+ int bi_socktype; /* type of socket supported */
+ short bi_fork; /* 1 if should fork before call */
+ short bi_wait; /* 1 if should wait for child */
+ void (*bi_fn) (int, servtab_t *);
};
- /* Echo received data */
+ /* Echo received data */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
-static void echo_stream(int, servtab_t *);
-static void echo_dg(int, servtab_t *);
+static void echo_stream (int, servtab_t *);
+static void echo_dg (int, servtab_t *);
#endif
- /* Internet /dev/null */
+ /* Internet /dev/null */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
-static void discard_stream(int, servtab_t *);
-static void discard_dg(int, servtab_t *);
+static void discard_stream (int, servtab_t *);
+static void discard_dg (int, servtab_t *);
#endif
/* Return 32 bit time since 1900 */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
-static void machtime_stream(int, servtab_t *);
-static void machtime_dg(int, servtab_t *);
+static void machtime_stream (int, servtab_t *);
+static void machtime_dg (int, servtab_t *);
#endif
/* Return human-readable time */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
-static void daytime_stream(int, servtab_t *);
-static void daytime_dg(int, servtab_t *);
+static void daytime_stream (int, servtab_t *);
+static void daytime_dg (int, servtab_t *);
#endif
/* Familiar character generator */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
-static void chargen_stream(int, servtab_t *);
-static void chargen_dg(int, servtab_t *);
+static void chargen_stream (int, servtab_t *);
+static void chargen_dg (int, servtab_t *);
#endif
static const struct biltin biltins[] = {
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
- /* Echo received data */
- { "echo", SOCK_STREAM, 1, 0, echo_stream, },
- { "echo", SOCK_DGRAM, 0, 0, echo_dg, },
+ /* Echo received data */
+ {"echo", SOCK_STREAM, 1, 0, echo_stream,},
+ {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
#endif
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
- /* Internet /dev/null */
- { "discard", SOCK_STREAM, 1, 0, discard_stream, },
- { "discard", SOCK_DGRAM, 0, 0, discard_dg, },
+ /* Internet /dev/null */
+ {"discard", SOCK_STREAM, 1, 0, discard_stream,},
+ {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
#endif
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
- /* Return 32 bit time since 1900 */
- { "time", SOCK_STREAM, 0, 0, machtime_stream, },
- { "time", SOCK_DGRAM, 0, 0, machtime_dg, },
+ /* Return 32 bit time since 1900 */
+ {"time", SOCK_STREAM, 0, 0, machtime_stream,},
+ {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
#endif
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
- /* Return human-readable time */
- { "daytime", SOCK_STREAM, 0, 0, daytime_stream, },
- { "daytime", SOCK_DGRAM, 0, 0, daytime_dg, },
+ /* Return human-readable time */
+ {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
+ {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
#endif
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
- /* Familiar character generator */
- { "chargen", SOCK_STREAM, 1, 0, chargen_stream, },
- { "chargen", SOCK_DGRAM, 0, 0, chargen_dg, },
+ /* Familiar character generator */
+ {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
+ {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
#endif
- { NULL, 0, 0, 0, NULL }
+ {NULL, 0, 0, 0, NULL}
};
-#endif /* INETD_FEATURE_ENABLED */
+#endif /* INETD_FEATURE_ENABLED */
-#ifdef RLIMIT_NOFILE
-static struct rlimit rlim_ofile;
-#endif
+static int global_queuelen = 128;
+static int nsock, maxsock;
+static fd_set allsock;
+static int toomany = TOOMANY;
+static int timingout;
+static struct servent *sp;
+static uid_t uid;
-/* Length of socket listen queue. Should be per-service probably. */
-static int global_queuelen = 128;
+static char *CONFIG = _PATH_INETDCONF;
static FILE *fconfig;
-static sigset_t blockmask;
-static sigset_t emptymask;
-static fd_set allsock;
-static int nsock;
-static int maxsock;
-static int timingout;
-static int rlim_ofile_cur = OPEN_MAX;
-static const char *CONFIG = _PATH_INETDCONF;
+static char line[1024];
+static char *defhost;
-static void
-syslog_err_and_discard_dg(int se_socktype, const char *msg, ...)
- __attribute__ ((noreturn, format (printf, 2, 3)));
+static char *newstr (char *cp)
+{
+ if ((cp = strdup (cp ? cp : "")))
+ return (cp);
+ syslog (LOG_ERR, "strdup: %m");
+ exit (1);
+}
-static void
-syslog_err_and_discard_dg(int se_socktype, const char *msg, ...)
+static int setconfig (void)
{
- char buf[50];
- va_list p;
-
- va_start(p, msg);
- vsyslog(LOG_ERR, msg, p);
- if (se_socktype != SOCK_STREAM)
- recv(0, buf, sizeof (buf), 0);
- _exit(1);
+ free (defhost);
+ defhost = newstr ("*");
+ if (fconfig != NULL) {
+ fseek (fconfig, 0L, SEEK_SET);
+ return (1);
+ }
+ fconfig = fopen (CONFIG, "r");
+ return (fconfig != NULL);
}
-static char * inetd_strdup(const char *s)
+static void endconfig (void)
{
- char *ms = strdup(s);
+ if (fconfig) {
+ (void) fclose (fconfig);
+ fconfig = NULL;
+ }
+ free (defhost);
+ defhost = 0;
+}
- if(ms == NULL)
- syslog_err_and_discard_dg(SOCK_STREAM, "strdup: %m");
- return ms;
+#ifdef CONFIG_FEATURE_INETD_RPC
+static void register_rpc (servtab_t *sep)
+{
+ int n;
+ struct sockaddr_in ir_sin;
+ struct protoent *pp;
+
+ if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
+ syslog (LOG_ERR, "%s: getproto: %m", sep->se_proto);
+ return;
+ }
+ n = sizeof ir_sin;
+ if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &n) < 0) {
+ syslog (LOG_ERR, "%s/%s: getsockname: %m",
+ sep->se_service, sep->se_proto);
+ return;
+ }
+
+ for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
+ (void) pmap_unset (sep->se_rpcprog, n);
+ if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
+ syslog (LOG_ERR, "%s %s: pmap_set: %u %u %u %u: %m",
+ sep->se_service, sep->se_proto,
+ sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
+ }
}
+static void unregister_rpc (servtab_t *sep)
+{
+ int n;
+
+ for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
+ if (!pmap_unset (sep->se_rpcprog, n))
+ syslog (LOG_ERR, "pmap_unset(%u, %u)", sep->se_rpcprog, n);
+ }
+}
+#endif /* CONFIG_FEATURE_INETD_RPC */
-static servtab_t *getconfigent(void)
+static void freeconfig (servtab_t *cp)
{
- static servtab_t serv;
- servtab_t *sep = &serv;
- int argc;
- char *cp = NULL;
- char *cp_ptr;
- char *cp_ptr_ptr = NULL;
+ int i;
+
+ free (cp->se_hostaddr);
+ free (cp->se_service);
+ free (cp->se_proto);
+ free (cp->se_user);
+ free (cp->se_group);
+ free (cp->se_server);
+ for (i = 0; i < MAXARGV; i++)
+ if (cp->se_argv[i])
+ free (cp->se_argv[i]);
+}
-more:
- free(cp);
- cp = bb_get_chomped_line_from_file(fconfig);
- if (feof(fconfig)) {
- free(cp);
- return (NULL);
- }
- if ((cp == NULL) || (*cp == '#')) {
- goto more;
- }
- /* make bind 0.0.0.0 and other zero default */
- memset((char *)sep, 0, sizeof *sep);
+static int bump_nofile (void)
+{
+#define FD_CHUNK 32
+
+ struct rlimit rl;
+
+ if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
+ syslog (LOG_ERR, "getrlimit: %m");
+ return -1;
+ }
+ rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
+ rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
+ if (rl.rlim_cur <= rlim_ofile_cur) {
+ syslog (LOG_ERR, "bump_nofile: cannot extend file limit, max = %d",
+ (int) rl.rlim_cur);
+ return -1;
+ }
+
+ if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
+ syslog (LOG_ERR, "setrlimit: %m");
+ return -1;
+ }
+
+ rlim_ofile_cur = rl.rlim_cur;
+ return 0;
+}
- cp_ptr = strtok_r(cp, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* Error */
- goto more;
- }
- sep->se_service = inetd_strdup(cp_ptr);
+static void setup (servtab_t *sep)
+{
+ int on = 1;
+ int r;
+
+ if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
+ syslog (LOG_ERR, "%s/%s: socket: %m", sep->se_service, sep->se_proto);
+ return;
+ }
+#define turnon(fd, opt) \
+setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
+ if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
+ syslog (LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
+#undef turnon
+
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (isrpcservice (sep)) {
+ struct passwd *pwd;
- cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* Error */
- goto more;
- }
- if (strcmp(cp_ptr, "stream") == 0)
- sep->se_socktype = SOCK_STREAM;
- else if (strcmp(cp_ptr, "dgram") == 0)
- sep->se_socktype = SOCK_DGRAM;
- else if (strcmp(cp_ptr, "rdm") == 0)
- sep->se_socktype = SOCK_RDM;
- else if (strcmp(cp_ptr, "seqpacket") == 0)
- sep->se_socktype = SOCK_SEQPACKET;
- else if (strcmp(cp_ptr, "raw") == 0)
- sep->se_socktype = SOCK_RAW;
- else
- sep->se_socktype = -1;
-
- cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* error */
- goto more;
+ /*
+ * for RPC services, attempt to use a reserved port
+ * if they are going to be running as root.
+ *
+ * Also, zero out the port for all RPC services; let bind()
+ * find one.
+ */
+ sep->se_ctrladdr_in.sin_port = 0;
+ if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
+ pwd->pw_uid == 0 && uid == 0)
+ r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
+ else {
+ r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
+ if (r == 0) {
+ int len = sep->se_ctrladdr_size;
+ int saveerrno = errno;
+
+ /* update se_ctrladdr_in.sin_port */
+ r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
+ if (r <= 0)
+ errno = saveerrno;
+ }
}
- if (strcmp(cp_ptr, "unix") == 0) {
- sep->se_family = AF_UNIX;
- } else {
- if (strncmp(cp_ptr, "rpc/", 4) == 0) {
- syslog(LOG_ERR, "%s: rpc services not supported",
- sep->se_service);
- goto more;
- }
- sep->se_family = AF_INET;
+ } else
+#endif
+ r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
+ if (r < 0) {
+ syslog (LOG_ERR, "%s/%s (%d): bind: %m",
+ sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
+ close (sep->se_fd);
+ sep->se_fd = -1;
+ if (!timingout) {
+ timingout = 1;
+ alarm (RETRYTIME);
}
- sep->se_proto = inetd_strdup(cp_ptr);
+ return;
+ }
+ if (sep->se_socktype == SOCK_STREAM)
+ listen (sep->se_fd, global_queuelen);
+
+ FD_SET (sep->se_fd, &allsock);
+ nsock++;
+ if (sep->se_fd > maxsock) {
+ maxsock = sep->se_fd;
+ if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
+ bump_nofile ();
+ }
+}
- cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* error */
- goto more;
- }
- {
- char *s = strchr(cp_ptr, '.');
- if (s) {
- *s++ = '\0';
- sep->se_max = atoi(s);
- } else
- sep->se_max = TOOMANY;
- }
- sep->se_wait = strcmp(cp_ptr, "wait") == 0;
+static char *nextline (void)
+{
+ char *cp;
+ FILE *fd = fconfig;
+
+ if (fgets (line, sizeof (line), fd) == NULL)
+ return (NULL);
+ cp = strchr (line, '\n');
+ if (cp)
+ *cp = '\0';
+ return (line);
+}
- cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* error */
- goto more;
- }
+static char *skip (char **cpp) /* int report; */
+{
+ char *cp = *cpp;
+ char *start;
+
+/* erp: */
+ if (*cpp == NULL) {
+ /* if (report) */
+ /* syslog(LOG_ERR, "syntax error in inetd config file"); */
+ return (NULL);
+ }
+
+again:
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ if (*cp == '\0') {
+ int c;
+
+ c = getc (fconfig);
+ (void) ungetc (c, fconfig);
+ if (c == ' ' || c == '\t')
+ if ((cp = nextline ()))
+ goto again;
+ *cpp = NULL;
+ /* goto erp; */
+ return (NULL);
+ }
+ start = cp;
+ while (*cp && *cp != ' ' && *cp != '\t')
+ cp++;
+ if (*cp != '\0')
+ *cp++ = '\0';
+ /* if ((*cpp = cp) == NULL) */
+ /* goto erp; */
+
+ *cpp = cp;
+ return (start);
+}
- sep->se_user = inetd_strdup(cp_ptr);
- {
- char *cp_ptr2 = strchr(sep->se_user, '.');
+static servtab_t *new_servtab(void)
+{
+ servtab_t *sep;
+
+ sep = (servtab_t *) malloc (sizeof (servtab_t));
+ if (sep == NULL) {
+ syslog (LOG_ERR, bb_msg_memory_exhausted);
+ exit (1);
+ }
+ return sep;
+}
- if (cp_ptr2) {
- *cp_ptr2++ = '\0';
- }
- sep->se_group = cp_ptr2;
- }
+static servtab_t *dupconfig (servtab_t *sep)
+{
+ servtab_t *newtab;
+ int argc;
+
+ newtab = new_servtab();
+ memset (newtab, 0, sizeof (servtab_t));
+ newtab->se_service = sep->se_service ? newstr (sep->se_service) : NULL;
+ newtab->se_socktype = sep->se_socktype;
+ newtab->se_family = sep->se_family;
+ newtab->se_proto = sep->se_proto ? newstr (sep->se_proto) : NULL;
+#ifdef CONFIG_FEATURE_INETD_RPC
+ newtab->se_rpcprog = sep->se_rpcprog;
+ newtab->se_rpcversl = sep->se_rpcversl;
+ newtab->se_rpcversh = sep->se_rpcversh;
+#endif
+ newtab->se_wait = sep->se_wait;
+ newtab->se_user = sep->se_user ? newstr (sep->se_user) : NULL;
+ newtab->se_group = sep->se_group ? newstr (sep->se_group) : NULL;
+#ifdef INETD_FEATURE_ENABLED
+ newtab->se_bi = sep->se_bi;
+#endif
+ newtab->se_server = sep->se_server ? newstr (sep->se_server) : 0;
+
+ for (argc = 0; argc <= MAXARGV; argc++)
+ newtab->se_argv[argc] = sep->se_argv[argc] ?
+ newstr (sep->se_argv[argc]) : NULL;
+ newtab->se_max = sep->se_max;
- cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
- if (cp_ptr == NULL) {
- /* error */
+ return (newtab);
+}
+
+static servtab_t *getconfigent (void)
+{
+ servtab_t *sep;
+ int argc;
+ char *cp, *arg;
+ char *hostdelim;
+ servtab_t *nsep;
+ servtab_t *psep;
+
+ sep = new_servtab();
+
+ /* memset(sep, 0, sizeof *sep); */
+more:
+ /* freeconfig(sep); */
+
+ while ((cp = nextline ()) && *cp == '#');
+ if (cp == NULL) {
+ /* free(sep); */
+ return (NULL);
+ }
+
+ memset ((char *) sep, 0, sizeof *sep);
+ arg = skip (&cp);
+ if (arg == NULL) {
+ /* A blank line. */
+ goto more;
+ }
+
+ /* Check for a host name. */
+ hostdelim = strrchr (arg, ':');
+ if (hostdelim) {
+ *hostdelim = '\0';
+ sep->se_hostaddr = newstr (arg);
+ arg = hostdelim + 1;
+ /*
+ * If the line is of the form `host:', then just change the
+ * default host for the following lines.
+ */
+ if (*arg == '\0') {
+ arg = skip (&cp);
+ if (cp == NULL) {
+ free (defhost);
+ defhost = sep->se_hostaddr;
goto more;
+ }
}
- if (strcmp(cp_ptr, "internal") == 0) {
-#ifdef INETD_FEATURE_ENABLED
- const struct biltin *bi;
-
- for (bi = biltins; bi->bi_service; bi++) {
- if ((bi->bi_socktype == sep->se_socktype) &&
- (strcmp(bi->bi_service, sep->se_service) == 0)) {
- break;
- }
- }
- if (bi->bi_service == 0) {
- syslog(LOG_ERR, "internal service %s unknown", sep->se_service);
- goto more;
- }
- sep->se_bi = bi;
- sep->se_wait = bi->bi_wait;
+ } else
+ sep->se_hostaddr = newstr (defhost);
+
+ sep->se_service = newstr (arg);
+ arg = skip (&cp);
+
+ if (strcmp (arg, "stream") == 0)
+ sep->se_socktype = SOCK_STREAM;
+ else if (strcmp (arg, "dgram") == 0)
+ sep->se_socktype = SOCK_DGRAM;
+ else if (strcmp (arg, "rdm") == 0)
+ sep->se_socktype = SOCK_RDM;
+ else if (strcmp (arg, "seqpacket") == 0)
+ sep->se_socktype = SOCK_SEQPACKET;
+ else if (strcmp (arg, "raw") == 0)
+ sep->se_socktype = SOCK_RAW;
+ else
+ sep->se_socktype = -1;
+
+ sep->se_proto = newstr (skip (&cp));
+
+ if (strcmp (sep->se_proto, "unix") == 0) {
+ sep->se_family = AF_UNIX;
+ } else {
+ sep->se_family = AF_INET;
+ if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
+#ifdef CONFIG_FEATURE_IPV6
+ sep->se_family = AF_INET6;
#else
- syslog(LOG_ERR, "internal service %s unknown", cp_ptr);
+ syslog (LOG_ERR, "%s: IPV6 not supported", sep->se_proto);
+#endif
+ if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
+#ifdef CONFIG_FEATURE_INETD_RPC
+ char *p, *ccp;
+ long l;
+
+ p = strchr (sep->se_service, '/');
+ if (p == 0) {
+ syslog (LOG_ERR, "%s: no rpc version", sep->se_service);
+ goto more;
+ }
+ *p++ = '\0';
+ l = strtol (p, &ccp, 0);
+ if (ccp == p || l < 0 || l > INT_MAX) {
+ badafterall:
+ syslog (LOG_ERR, "%s/%s: bad rpc version", sep->se_service, p);
goto more;
+ }
+ sep->se_rpcversl = sep->se_rpcversh = l;
+ if (*ccp == '-') {
+ p = ccp + 1;
+ l = strtol (p, &ccp, 0);
+ if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
+ goto badafterall;
+ sep->se_rpcversh = l;
+ } else if (*ccp != '\0')
+ goto badafterall;
+#else
+ syslog (LOG_ERR, "%s: rpc services not supported", sep->se_service);
#endif
}
+ }
+ arg = skip (&cp);
+ if (arg == NULL)
+ goto more;
+
+ {
+ char *s = strchr (arg, '.');
+ if (s) {
+ *s++ = '\0';
+ sep->se_max = atoi (s);
+ } else
+ sep->se_max = toomany;
+ }
+ sep->se_wait = strcmp (arg, "wait") == 0;
+ /* if ((arg = skip(&cp, 1)) == NULL) */
+ /* goto more; */
+ sep->se_user = newstr (skip (&cp));
+ arg = strchr (sep->se_user, '.');
+ if (arg == NULL)
+ arg = strchr (sep->se_user, ':');
+ if (arg) {
+ *arg++ = '\0';
+ sep->se_group = newstr (arg);
+ }
+ /* if ((arg = skip(&cp, 1)) == NULL) */
+ /* goto more; */
+
+ sep->se_server = newstr (skip (&cp));
+ if (strcmp (sep->se_server, "internal") == 0) {
#ifdef INETD_FEATURE_ENABLED
- else {
- sep->se_bi = NULL;
+ const struct biltin *bi;
+
+ for (bi = biltins; bi->bi_service; bi++)
+ if (bi->bi_socktype == sep->se_socktype &&
+ strcmp (bi->bi_service, sep->se_service) == 0)
+ break;
+ if (bi->bi_service == 0) {
+ syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
+ goto more;
}
+ sep->se_bi = bi;
+ sep->se_wait = bi->bi_wait;
+#else
+ syslog (LOG_ERR, "internal service %s unknown", sep->se_service);
+ goto more;
+#endif
+ }
+#ifdef INETD_FEATURE_ENABLED
+ else
+ sep->se_bi = NULL;
#endif
- sep->se_server = inetd_strdup(cp_ptr);
+ argc = 0;
+ for (arg = skip (&cp); cp; arg = skip (&cp)) {
+ if (argc < MAXARGV)
+ sep->se_argv[argc++] = newstr (arg);
+ }
+ while (argc <= MAXARGV)
+ sep->se_argv[argc++] = NULL;
+
+ /*
+ * Now that we've processed the entire line, check if the hostname
+ * specifier was a comma separated list of hostnames. If so
+ * we'll make new entries for each address.
+ */
+ while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
+ nsep = dupconfig (sep);
- argc = 0;
- while ((cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr)) != NULL) {
- if (argc < MAXARGV) {
- sep->se_argv[argc++] = inetd_strdup(cp_ptr);
+ /*
+ * NULL terminate the hostname field of the existing entry,
+ * and make a dup for the new entry.
+ */
+ *hostdelim++ = '\0';
+ nsep->se_hostaddr = newstr (hostdelim);
+
+ nsep->se_next = sep->se_next;
+ sep->se_next = nsep;
+ }
+
+ nsep = sep;
+ while (nsep != NULL) {
+ nsep->se_checked = 1;
+ if (nsep->se_family == AF_INET) {
+ if (!strcmp (nsep->se_hostaddr, "*"))
+ nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
+ else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
+ struct hostent *hp;
+
+ hp = gethostbyname (nsep->se_hostaddr);
+ if (hp == 0) {
+ syslog (LOG_ERR, "%s: unknown host", nsep->se_hostaddr);
+ nsep->se_checked = 0;
+ goto skip;
+ } else if (hp->h_addrtype != AF_INET) {
+ syslog (LOG_ERR,
+ "%s: address isn't an Internet "
+ "address", nsep->se_hostaddr);
+ nsep->se_checked = 0;
+ goto skip;
+ } else {
+ int i = 1;
+
+ memmove (&nsep->se_ctrladdr_in.sin_addr,
+ hp->h_addr_list[0], sizeof (struct in_addr));
+ while (hp->h_addr_list[i] != NULL) {
+ psep = dupconfig (nsep);
+ psep->se_hostaddr = newstr (nsep->se_hostaddr);
+ psep->se_checked = 1;
+ memmove (&psep->se_ctrladdr_in.sin_addr,
+ hp->h_addr_list[i], sizeof (struct in_addr));
+ psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
+ i++;
+ /* Prepend to list, don't want to look up its */
+ /* hostname again. */
+ psep->se_next = sep;
+ sep = psep;
+ }
}
+ }
+ }
+/* XXX BUG?: is this skip: label supposed to remain? */
+ skip:
+ nsep = nsep->se_next;
+ }
+
+ /*
+ * Finally, free any entries which failed the gethostbyname
+ * check.
+ */
+ psep = NULL;
+ nsep = sep;
+ while (nsep != NULL) {
+ servtab_t *tsep;
+
+ if (nsep->se_checked == 0) {
+ tsep = nsep;
+ if (psep == NULL) {
+ sep = nsep->se_next;
+ nsep = sep;
+ } else {
+ nsep = nsep->se_next;
+ psep->se_next = nsep;
+ }
+ freeconfig (tsep);
+ } else {
+ nsep->se_checked = 0;
+ psep = nsep;
+ nsep = nsep->se_next;
}
- free(cp);
+ }
- return (sep);
+ return (sep);
}
-static void freeconfig(servtab_t *cp)
+static servtab_t *enter (servtab_t *cp)
{
- int i;
-
- free(cp->se_service);
- free(cp->se_proto);
- free(cp->se_user);
- /* Note: se_group is part of the newstr'ed se_user */
- free(cp->se_server);
- for (i = 0; i < MAXARGV; i++)
- free(cp->se_argv[i]);
+ servtab_t *sep;
+ int omask;
+
+ sep = new_servtab();
+ *sep = *cp;
+ sep->se_fd = -1;
+#ifdef CONFIG_FEATURE_INETD_RPC
+ sep->se_rpcprog = -1;
+#endif
+ omask = sigblock (SIGBLOCK);
+ sep->se_next = servtab;
+ servtab = sep;
+ sigsetmask (omask);
+ return (sep);
}
-#ifdef INETD_FEATURE_ENABLED
-static char **Argv;
-static char *LastArg;
-
-static void setproctitle(char *a, int s)
+static int matchconf (servtab_t *old, servtab_t *new)
{
- socklen_t size;
- char *cp;
- struct sockaddr_in sn;
- char buf[80];
-
- cp = Argv[0];
- size = sizeof(sn);
- if (getpeername(s, (struct sockaddr *)&sn, &size) == 0)
- (void) sprintf(buf, "-%s [%s]", a, inet_ntoa(sn.sin_addr));
- else
- (void) sprintf(buf, "-%s", a);
- strncpy(cp, buf, LastArg - cp);
- cp += strlen(cp);
- while (cp < LastArg)
- *cp++ = ' ';
+ if (strcmp (old->se_service, new->se_service) != 0)
+ return (0);
+
+ if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
+ return (0);
+
+ if (strcmp (old->se_proto, new->se_proto) != 0)
+ return (0);
+
+ /*
+ * If the new servtab is bound to a specific address, check that the
+ * old servtab is bound to the same entry. If the new service is not
+ * bound to a specific address then the check of se_hostaddr above
+ * is sufficient.
+ */
+
+ if (old->se_family == AF_INET && new->se_family == AF_INET &&
+ memcmp (&old->se_ctrladdr_in.sin_addr,
+ &new->se_ctrladdr_in.sin_addr,
+ sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
+ return (0);
+
+#ifdef CONFIG_FEATURE_IPV6
+ if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
+ memcmp (&old->se_ctrladdr_in6.sin6_addr,
+ &new->se_ctrladdr_in6.sin6_addr,
+ sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
+ return (0);
+#endif
+ return (1);
}
-#endif /* INETD_FEATURE_ENABLED */
-
-static void setup(servtab_t *sep)
+static void config (int sig __attribute__((unused)))
{
- int on = 1;
+ servtab_t *sep, *cp, **sepp;
+ int omask;
+ int add;
+ size_t n;
+ char protoname[10];
+
+ if (!setconfig ()) {
+ syslog (LOG_ERR, "%s: %m", CONFIG);
+ return;
+ }
+ for (sep = servtab; sep; sep = sep->se_next)
+ sep->se_checked = 0;
+ cp = getconfigent ();
+ while (cp != NULL) {
+ for (sep = servtab; sep; sep = sep->se_next)
+ if (matchconf (sep, cp))
+ break;
+ add = 0;
+ if (sep != 0) {
+ int i;
+
+#define SWAP(type, a, b) {type c=(type)a; (type)a=(type)b; (type)b=(type)c;}
+
+ omask = sigblock (SIGBLOCK);
+ /*
+ * sep->se_wait may be holding the pid of a daemon
+ * that we're waiting for. If so, don't overwrite
+ * it unless the config file explicitly says don't
+ * wait.
+ */
+ if (
+#ifdef INETD_FEATURE_ENABLED
+ cp->se_bi == 0 &&
+#endif
+ (sep->se_wait == 1 || cp->se_wait == 0))
+ sep->se_wait = cp->se_wait;
+ SWAP (int, cp->se_max, sep->se_max);
+ SWAP (char *, sep->se_user, cp->se_user);
+ SWAP (char *, sep->se_group, cp->se_group);
+ SWAP (char *, sep->se_server, cp->se_server);
+ for (i = 0; i < MAXARGV; i++)
+ SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
+#undef SWAP
- if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) {
- syslog(LOG_ERR, "%s/%s: socket: %m",
- sep->se_service, sep->se_proto);
- return;
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (isrpcservice (sep))
+ unregister_rpc (sep);
+ sep->se_rpcversl = cp->se_rpcversl;
+ sep->se_rpcversh = cp->se_rpcversh;
+#endif
+ sigsetmask (omask);
+ freeconfig (cp);
+ add = 1;
+ } else {
+ sep = enter (cp);
}
- if (setsockopt(sep->se_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on,
- sizeof(on)) < 0)
- syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
- if (bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size) < 0) {
- syslog(LOG_ERR, "%s/%s: bind: %m",
- sep->se_service, sep->se_proto);
- (void) close(sep->se_fd);
- sep->se_fd = -1;
- if (!timingout) {
- timingout = 1;
- alarm(RETRYTIME);
+ sep->se_checked = 1;
+
+ switch (sep->se_family) {
+ case AF_UNIX:
+ if (sep->se_fd != -1)
+ break;
+ (void) unlink (sep->se_service);
+ n = strlen (sep->se_service);
+ if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
+ n = sizeof sep->se_ctrladdr_un.sun_path - 1;
+ safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
+ sep->se_ctrladdr_un.sun_family = AF_UNIX;
+ sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
+ setup (sep);
+ break;
+ case AF_INET:
+ sep->se_ctrladdr_in.sin_family = AF_INET;
+ /* se_ctrladdr_in was set in getconfigent */
+ sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
+
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (isrpcservice (sep)) {
+ struct rpcent *rp;
+
+ sep->se_rpcprog = atoi (sep->se_service);
+ if (sep->se_rpcprog == 0) {
+ rp = getrpcbyname (sep->se_service);
+ if (rp == 0) {
+ syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
+ goto serv_unknown;
+ }
+ sep->se_rpcprog = rp->r_number;
}
- return;
- }
- if (sep->se_socktype == SOCK_STREAM)
- listen(sep->se_fd, global_queuelen);
-
- FD_SET(sep->se_fd, &allsock);
- nsock++;
- if (sep->se_fd > maxsock) {
- maxsock = sep->se_fd;
- if (maxsock > rlim_ofile_cur - FD_MARGIN) {
-#ifdef RLIMIT_NOFILE
-# define FD_CHUNK 32
- struct rlimit rl;
-
- if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
- syslog(LOG_ERR, "getrlimit: %m");
- return;
- }
- rl.rlim_cur = rl.rlim_max < (rl.rlim_cur + FD_CHUNK) ? rl.rlim_max : (rl.rlim_cur + FD_CHUNK);
- if (rl.rlim_cur <= rlim_ofile_cur) {
- syslog(LOG_ERR,
-# if _FILE_OFFSET_BITS == 64
- "bump_nofile: cannot extend file limit, max = %lld",
-# else
- "bump_nofile: cannot extend file limit, max = %ld",
-# endif
- rl.rlim_cur);
- return;
- }
-
- if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
- syslog(LOG_ERR, "setrlimit: %m");
- return;
- }
-
- rlim_ofile_cur = rl.rlim_cur;
- return;
-#else
- syslog(LOG_ERR, "bump_nofile: cannot extend file limit");
- return;
-#endif /* RLIMIT_NOFILE */
+ if (sep->se_fd == -1)
+ setup (sep);
+ if (sep->se_fd != -1)
+ register_rpc (sep);
+ } else
+#endif
+ {
+ u_short port = htons (atoi (sep->se_service));
+
+ if (!port) {
+ /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
+ if (isdigit (protoname[strlen (protoname) - 1]))
+ protoname[strlen (protoname) - 1] = '\0';
+ sp = getservbyname (sep->se_service, protoname);
+ if (sp == 0) {
+ syslog (LOG_ERR,
+ "%s/%s: unknown service", sep->se_service, sep->se_proto);
+ goto serv_unknown;
+ }
+ port = sp->s_port;
}
- }
-}
-
-static void config(int signum)
-{
- servtab_t *sep, *cp, **sepp;
- sigset_t oldmask;
- unsigned n;
-
- (void)signum;
-
- if (fconfig != NULL) {
- fseek(fconfig, 0L, L_SET);
- } else {
- fconfig = fopen(CONFIG, "r");
- if (fconfig == NULL) {
- syslog(LOG_ERR, "%s: %m", CONFIG);
- return;
+ if (port != sep->se_ctrladdr_in.sin_port) {
+ sep->se_ctrladdr_in.sin_port = port;
+ if (sep->se_fd != -1) {
+ FD_CLR (sep->se_fd, &allsock);
+ nsock--;
+ (void) close (sep->se_fd);
+ }
+ sep->se_fd = -1;
}
- }
-
- for (sep = servtab; sep; sep = sep->se_next)
- sep->se_checked = 0;
- while ((cp = getconfigent()) != NULL) {
- for (sep = servtab; sep; sep = sep->se_next)
- if (strcmp(sep->se_service, cp->se_service) == 0 &&
- strcmp(sep->se_proto, cp->se_proto) == 0)
- break;
- if (sep != 0) {
- int i;
-
-#define SWAP(type, a, b) {type c=(type)(a); (a)=(type)(b); (b)=(type)c;}
-
- sigprocmask(SIG_BLOCK, &emptymask, &oldmask);
- /*
- * sep->se_wait may be holding the pid of a daemon
- * that we're waiting for. If so, don't overwrite
- * it unless the config file explicitly says don't
- * wait.
- */
- if (
-#ifdef INETD_FEATURE_ENABLED
- cp->se_bi == 0 &&
+ if (sep->se_fd == -1)
+ setup (sep);
+ }
+ break;
+#ifdef CONFIG_FEATURE_IPV6
+ case AF_INET6:
+ sep->se_ctrladdr_in6.sin6_family = AF_INET6;
+ /* se_ctrladdr_in was set in getconfigent */
+ sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
+
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (isrpcservice (sep)) {
+ struct rpcent *rp;
+
+ sep->se_rpcprog = atoi (sep->se_service);
+ if (sep->se_rpcprog == 0) {
+ rp = getrpcbyname (sep->se_service);
+ if (rp == 0) {
+ syslog (LOG_ERR, "%s: unknown rpc service", sep->se_service);
+ goto serv_unknown;
+ }
+ sep->se_rpcprog = rp->r_number;
+ }
+ if (sep->se_fd == -1)
+ setup (sep);
+ if (sep->se_fd != -1)
+ register_rpc (sep);
+ } else
#endif
- (sep->se_wait == 1 || cp->se_wait == 0))
- sep->se_wait = cp->se_wait;
- if (cp->se_max != sep->se_max)
- SWAP(int, cp->se_max, sep->se_max);
- if (cp->se_user)
- SWAP(char *, sep->se_user, cp->se_user);
- if (cp->se_group)
- SWAP(char *, sep->se_group, cp->se_group);
- if (cp->se_server)
- SWAP(char *, sep->se_server, cp->se_server);
- for (i = 0; i < MAXARGV; i++)
- SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
-#undef SWAP
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
- // This freeconfig() is probably a bug, since it will try and free()
- // each of the argv[] values, which are really just pointers
- // into the middle of a single line buffer for the config file.
- //freeconfig(cp); // BUG?
- } else {
- sep = (servtab_t *)xmalloc(sizeof (*sep));
- *sep = *cp;
- sep->se_fd = -1;
- sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
- sep->se_next = servtab;
- servtab = sep;
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ {
+ u_short port = htons (atoi (sep->se_service));
+
+ if (!port) {
+ /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
+ if (isdigit (protoname[strlen (protoname) - 1]))
+ protoname[strlen (protoname) - 1] = '\0';
+ sp = getservbyname (sep->se_service, protoname);
+ if (sp == 0) {
+ syslog (LOG_ERR,
+ "%s/%s: unknown service", sep->se_service, sep->se_proto);
+ goto serv_unknown;
+ }
+ port = sp->s_port;
}
- sep->se_checked = 1;
-
- switch (sep->se_family) {
- case AF_UNIX:
- if (sep->se_fd != -1)
- break;
- (void)unlink(sep->se_service);
- n = strlen(sep->se_service);
- if (n > sizeof(sep->se_ctrladdr_un.sun_path) - 1)
- n = sizeof(sep->se_ctrladdr_un.sun_path) - 1;
- strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n);
- sep->se_ctrladdr_un.sun_family = AF_UNIX;
- sep->se_ctrladdr_size = n +
- sizeof sep->se_ctrladdr_un.sun_family;
- setup(sep);
- break;
- case AF_INET:
- sep->se_ctrladdr_in.sin_family = AF_INET;
- sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
- {
- u_short port = bb_lookup_port(sep->se_service, sep->se_proto, 0);
-
- if (port == 0) {
- syslog(LOG_ERR,
- "%s/%s: unknown service",
- sep->se_service, sep->se_proto);
- continue;
- }
- if (port != sep->se_ctrladdr_in.sin_port) {
- sep->se_ctrladdr_in.sin_port = port;
- if (sep->se_fd != -1) {
- FD_CLR(sep->se_fd, &allsock);
- nsock--;
- (void) close(sep->se_fd);
- }
- sep->se_fd = -1;
- }
- if (sep->se_fd == -1)
- setup(sep);
- }
+ if (port != sep->se_ctrladdr_in6.sin6_port) {
+ sep->se_ctrladdr_in6.sin6_port = port;
+ if (sep->se_fd != -1) {
+ FD_CLR (sep->se_fd, &allsock);
+ nsock--;
+ (void) close (sep->se_fd);
+ }
+ sep->se_fd = -1;
}
+ if (sep->se_fd == -1)
+ setup (sep);
+ }
+ break;
+#endif /* CONFIG_FEATURE_IPV6 */
}
- if (fconfig) {
- (void) fclose(fconfig);
- fconfig = NULL;
+ serv_unknown:
+ if (cp->se_next != NULL) {
+ servtab_t *tmp = cp;
+
+ cp = cp->se_next;
+ free (tmp);
+ } else {
+ free (cp);
+ cp = getconfigent ();
}
- /*
- * Purge anything not looked at above.
- */
- sigprocmask(SIG_SETMASK, &blockmask, &oldmask);
- sepp = &servtab;
- while ((sep = *sepp) != NULL) {
- if (sep->se_checked) {
- sepp = &sep->se_next;
- continue;
- }
- *sepp = sep->se_next;
- if (sep->se_fd != -1) {
- FD_CLR(sep->se_fd, &allsock);
- nsock--;
- (void) close(sep->se_fd);
- }
- if (sep->se_family == AF_UNIX)
- (void)unlink(sep->se_service);
- freeconfig(sep);
- free((char *)sep);
+ }
+ endconfig ();
+ /*
+ * Purge anything not looked at above.
+ */
+ omask = sigblock (SIGBLOCK);
+ sepp = &servtab;
+ while ((sep = *sepp)) {
+ if (sep->se_checked) {
+ sepp = &sep->se_next;
+ continue;
+ }
+ *sepp = sep->se_next;
+ if (sep->se_fd != -1) {
+ FD_CLR (sep->se_fd, &allsock);
+ nsock--;
+ (void) close (sep->se_fd);
}
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (isrpcservice (sep))
+ unregister_rpc (sep);
+#endif
+ if (sep->se_family == AF_UNIX)
+ (void) unlink (sep->se_service);
+ freeconfig (sep);
+ free (sep);
+ }
+ (void) sigsetmask (omask);
}
-
-static void reapchild(int signum)
+static void reapchild (int sig __attribute__((unused)))
{
- int status;
- int pid;
- servtab_t *sep;
-
- (void)signum;
- for (;;) {
- pid = wait3(&status, WNOHANG, (struct rusage *)0);
- if (pid <= 0)
- break;
- for (sep = servtab; sep; sep = sep->se_next)
- if (sep->se_wait == pid) {
- if (WIFEXITED(status) && WEXITSTATUS(status))
- syslog(LOG_WARNING,
- "%s: exit status 0x%x",
- sep->se_server, WEXITSTATUS(status));
- else if (WIFSIGNALED(status))
- syslog(LOG_WARNING,
- "%s: exit signal 0x%x",
- sep->se_server, WTERMSIG(status));
- sep->se_wait = 1;
- FD_SET(sep->se_fd, &allsock);
- nsock++;
- }
- }
+ pid_t pid;
+ int save_errno = errno, status;
+ servtab_t *sep;
+
+ for (;;) {
+ pid = wait3 (&status, WNOHANG, NULL);
+ if (pid <= 0)
+ break;
+ for (sep = servtab; sep; sep = sep->se_next)
+ if (sep->se_wait == pid) {
+ if (WIFEXITED (status) && WEXITSTATUS (status))
+ syslog (LOG_WARNING,
+ "%s: exit status 0x%x",
+ sep->se_server, WEXITSTATUS (status));
+ else if (WIFSIGNALED (status))
+ syslog (LOG_WARNING,
+ "%s: exit signal 0x%x", sep->se_server, WTERMSIG (status));
+ sep->se_wait = 1;
+ FD_SET (sep->se_fd, &allsock);
+ nsock++;
+ }
+ }
+ errno = save_errno;
}
-static void retry(int signum)
+static void retry (int sig __attribute__((unused)))
{
- servtab_t *sep;
-
- (void)signum;
- timingout = 0;
- for (sep = servtab; sep; sep = sep->se_next) {
- if (sep->se_fd == -1) {
- switch (sep->se_family) {
- case AF_UNIX:
- case AF_INET:
- setup(sep);
- break;
- }
- }
+ servtab_t *sep;
+
+ timingout = 0;
+ for (sep = servtab; sep; sep = sep->se_next) {
+ if (sep->se_fd == -1) {
+ switch (sep->se_family) {
+ case AF_UNIX:
+ case AF_INET:
+#ifdef CONFIG_FEATURE_IPV6
+ case AF_INET6:
+#endif
+ setup (sep);
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (sep->se_fd != -1 && isrpcservice (sep))
+ register_rpc (sep);
+#endif
+ break;
+ }
}
+ }
}
-static void goaway(int signum)
+static void goaway (int sig __attribute__((unused)))
{
- servtab_t *sep;
-
- (void)signum;
- for (sep = servtab; sep; sep = sep->se_next)
- if (sep->se_fd != -1 && sep->se_family == AF_UNIX)
- (void)unlink(sep->se_service);
- (void)unlink(_PATH_INETDPID);
- exit(0);
+ servtab_t *sep;
+
+ /* XXX signal race walking sep list */
+ for (sep = servtab; sep; sep = sep->se_next) {
+ if (sep->se_fd == -1)
+ continue;
+
+ switch (sep->se_family) {
+ case AF_UNIX:
+ (void) unlink (sep->se_service);
+ break;
+ case AF_INET:
+#ifdef CONFIG_FEATURE_IPV6
+ case AF_INET6:
+#endif
+#ifdef CONFIG_FEATURE_INETD_RPC
+ if (sep->se_wait == 1 && isrpcservice (sep))
+ unregister_rpc (sep); /* XXX signal race */
+#endif
+ break;
+ }
+ (void) close (sep->se_fd);
+ }
+ (void) unlink (_PATH_INETDPID);
+ exit (0);
}
+#ifdef INETD_SETPROCTITLE
+static char **Argv;
+static char *LastArg;
-extern int inetd_main(int argc, char *argv[])
+static void
+inetd_setproctitle (char *a, int s)
{
- servtab_t *sep;
- struct group *grp = NULL;
- struct sigaction sa;
- int pid;
- unsigned long opt;
- char *sq;
- gid_t gid;
-
-#ifdef INETD_FEATURE_ENABLED
- extern char **environ;
+ int size;
+ char *cp;
+ struct sockaddr_in prt_sin;
+ char buf[80];
+
+ cp = Argv[0];
+ size = sizeof (prt_sin);
+ (void) snprintf (buf, sizeof buf, "-%s", a);
+ if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
+ char *sa = inet_ntoa (prt_sin.sin_addr);
+
+ buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
+ strcat (buf, " [");
+ strcat (buf, sa);
+ strcat (buf, "]");
+ }
+ strncpy (cp, buf, LastArg - cp);
+ cp += strlen (cp);
+ while (cp < LastArg)
+ *cp++ = ' ';
+}
#endif
- gid = getgid();
- setgroups(1, &gid);
-#ifdef INETD_FEATURE_ENABLED
- Argv = argv;
- if (environ == 0 || *environ == 0)
- environ = argv;
- while (*environ)
- environ++;
- LastArg = environ[-1] + strlen(environ[-1]);
+int
+inetd_main (int argc, char *argv[])
+{
+ servtab_t *sep;
+ struct passwd *pwd;
+ struct group *grp = NULL;
+ int tmpint;
+ struct sigaction sa, sapipe;
+ int opt;
+ pid_t pid;
+ char buf[50];
+ char *stoomany;
+
+#ifdef INETD_SETPROCTITLE
+ extern char **environ;
+ char **envp = environ;
+
+ Argv = argv;
+ if (envp == 0 || *envp == 0)
+ envp = argv;
+ while (*envp)
+ envp++;
+ LastArg = envp[-1] + strlen (envp[-1]);
#endif
- opt = bb_getopt_ulflags(argc, argv, "q:f", &sq);
- if (!(opt & 2)) {
- daemon(0, 0);
+ openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
+
+ opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
+ if(opt & 1) {
+ char *e;
+
+ toomany = strtoul (stoomany, &e, 0);
+ if (!(toomany >= 0 && *e == '\0')) {
+ toomany = TOOMANY;
+ syslog (LOG_ERR, "-R %s: bad value for service invocation rate", stoomany);
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ uid = getuid ();
+ if (uid != 0)
+ CONFIG = NULL;
+ if (argc > 0)
+ CONFIG = argv[0];
+ if (CONFIG == NULL)
+ bb_error_msg_and_die ("non-root must specify a config file");
+
+ if (!(opt & 2)) {
#if defined(__uClinux__)
- /* reexec for vfork() do continue parent */
- vfork_daemon_rexec(argc, argv, "-f");
+ /* reexec for vfork() do continue parent */
+ vfork_daemon_rexec (0, 0, argc, argv, "-f");
+#else
+ daemon (0, 0);
#endif /* uClinux */
- }
+ } else {
+ setsid ();
+ }
- if(opt & 1) {
- global_queuelen = atoi(sq);
- if (global_queuelen < 8) global_queuelen=8;
- }
- argc -= optind;
- argv += optind;
+ if (uid == 0) {
+ gid_t gid = getgid ();
- if (argc > 0)
- CONFIG = argv[0];
+ /* If run by hand, ensure groups vector gets trashed */
+ setgroups (1, &gid);
+ }
- openlog(bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
- {
- FILE *fp;
+ {
+ FILE *fp;
- if ((fp = fopen(_PATH_INETDPID, "w")) != NULL) {
- fprintf(fp, "%u\n", getpid());
- (void)fclose(fp);
- }
+ if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
+ fprintf (fp, "%u\n", getpid ());
+ (void) fclose (fp);
}
+ }
+
+ if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
+ syslog (LOG_ERR, "getrlimit: %m");
+ } else {
+ rlim_ofile_cur = rlim_ofile.rlim_cur;
+ if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
+ rlim_ofile_cur = OPEN_MAX;
+ }
+
+ memset ((char *) &sa, 0, sizeof (sa));
+ sigemptyset (&sa.sa_mask);
+ sigaddset (&sa.sa_mask, SIGALRM);
+ sigaddset (&sa.sa_mask, SIGCHLD);
+ sigaddset (&sa.sa_mask, SIGHUP);
+ sa.sa_handler = retry;
+ sigaction (SIGALRM, &sa, NULL);
+ /* doconfig(); */
+ config (SIGHUP);
+ sa.sa_handler = config;
+ sigaction (SIGHUP, &sa, NULL);
+ sa.sa_handler = reapchild;
+ sigaction (SIGCHLD, &sa, NULL);
+ sa.sa_handler = goaway;
+ sigaction (SIGTERM, &sa, NULL);
+ sa.sa_handler = goaway;
+ sigaction (SIGINT, &sa, NULL);
+ sa.sa_handler = SIG_IGN;
+ sigaction (SIGPIPE, &sa, &sapipe);
+
+ {
+ /* space for daemons to overwrite environment for ps */
+#define DUMMYSIZE 100
+ char dummy[DUMMYSIZE];
-#ifdef RLIMIT_NOFILE
- if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
- syslog(LOG_ERR, "getrlimit: %m");
- } else {
- rlim_ofile_cur = rlim_ofile.rlim_cur;
- if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
- rlim_ofile_cur = OPEN_MAX;
- }
-#endif
+ (void) memset (dummy, 'x', DUMMYSIZE - 1);
+ dummy[DUMMYSIZE - 1] = '\0';
- config(0);
-
- sigemptyset(&emptymask);
- sigemptyset(&blockmask);
- sigaddset(&blockmask, SIGCHLD);
- sigaddset(&blockmask, SIGHUP);
- sigaddset(&blockmask, SIGALRM);
-
- memset(&sa, 0, sizeof(sa));
- sa.sa_mask = blockmask;
- sa.sa_handler = retry;
- sigaction(SIGALRM, &sa, NULL);
- sa.sa_handler = config;
- sigaction(SIGHUP, &sa, NULL);
- sa.sa_handler = reapchild;
- sigaction(SIGCHLD, &sa, NULL);
- sa.sa_handler = goaway;
- sigaction(SIGTERM, &sa, NULL);
- sa.sa_handler = goaway;
- sigaction(SIGINT, &sa, NULL);
- sa.sa_handler = SIG_IGN;
- sigaction(SIGPIPE, &sa, NULL);
-
- {
- /* space for daemons to overwrite environment for ps */
-#define DUMMYSIZE 100
- char dummy[DUMMYSIZE];
+ (void) setenv ("inetd_dummy", dummy, 1);
+ }
- (void)memset(dummy, 'x', DUMMYSIZE - 1);
- dummy[DUMMYSIZE - 1] = '\0';
+ for (;;) {
+ int n, ctrl = -1;
+ fd_set readable;
- (void)setenv("inetd_dummy", dummy, 1);
+ if (nsock == 0) {
+ (void) sigblock (SIGBLOCK);
+ while (nsock == 0)
+ sigpause (0L);
+ (void) sigsetmask (0L);
}
- for (;;) {
- fd_set readable;
- int ctrl;
- int n;
-
- if (nsock == 0) {
- sigprocmask(SIG_BLOCK, &blockmask, NULL);
- while (nsock == 0) {
- sigsuspend(&emptymask);
+ readable = allsock;
+ if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
+ if (n < 0 && errno != EINTR) {
+ syslog (LOG_WARNING, "select: %m");
+ sleep (1);
+ }
+ continue;
+ }
+ for (sep = servtab; n && sep; sep = sep->se_next)
+ if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) {
+ n--;
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
+ ctrl = accept (sep->se_fd, NULL, NULL);
+ if (ctrl < 0) {
+ if (errno == EINTR)
+ continue;
+ syslog (LOG_WARNING, "accept (for %s): %m", sep->se_service);
+ continue;
+ }
+ if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
+ struct sockaddr_in peer;
+ int plen = sizeof (peer);
+
+ if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
+ syslog (LOG_WARNING, "could not getpeername");
+ close (ctrl);
+ continue;
}
- sigprocmask(SIG_SETMASK, &emptymask, NULL);
- }
- readable = allsock;
- n = select(maxsock + 1, &readable, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
- if (n <= 0) {
- if (n < 0 && errno != EINTR) {
- syslog(LOG_WARNING, "select: %m");
+ if (ntohs (peer.sin_port) == 20) {
+ /* XXX ftp bounce */
+ close (ctrl);
+ continue;
}
- sleep(1);
- continue;
- }
- for (sep = servtab; n && sep; sep = sep->se_next) {
- if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
- n--;
- if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
- /* Fixed AGC */
- fcntl(sep->se_fd, F_SETFL, O_NDELAY);
- /* --------- */
- ctrl = accept(sep->se_fd, NULL, NULL);
- fcntl(sep->se_fd, F_SETFL, 0);
- if (ctrl < 0) {
- if (errno == EINTR || errno == EWOULDBLOCK) {
- continue;
- }
- syslog(LOG_WARNING, "accept (for %s): %m",
- sep->se_service);
- continue;
- }
- } else {
- ctrl = sep->se_fd;
- }
- sigprocmask(SIG_BLOCK, &blockmask, NULL);
- pid = 0;
+ }
+ } else
+ ctrl = sep->se_fd;
+ (void) sigblock (SIGBLOCK);
+ pid = 0;
#ifdef INETD_FEATURE_ENABLED
- if (sep->se_bi == 0 || sep->se_bi->bi_fork)
+ if (sep->se_bi == 0 || sep->se_bi->bi_fork)
#endif
- {
- if (sep->se_count++ == 0) {
- gettimeofday(&sep->se_time, (struct timezone *)0);
- }
- else if (sep->se_count >= sep->se_max) {
- struct timeval now;
-
- gettimeofday(&now, (struct timezone *)0);
- if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
- sep->se_time = now;
- sep->se_count = 1;
- } else {
- syslog(LOG_ERR,
- "%s/%s server failing (looping), service terminated",
- sep->se_service, sep->se_proto);
- FD_CLR(sep->se_fd, &allsock);
- close(sep->se_fd);
- sep->se_fd = -1;
- sep->se_count = 0;
- nsock--;
- sigprocmask(SIG_SETMASK, &emptymask, NULL);
- if (!timingout) {
- timingout = 1;
- alarm(RETRYTIME);
- }
- continue;
- }
- }
- pid = fork();
- if (pid < 0) {
- syslog(LOG_ERR, "fork: %m");
- if (sep->se_socktype == SOCK_STREAM) {
- close(ctrl);
- }
- sigprocmask(SIG_SETMASK, &emptymask, NULL);
- sleep(1);
- continue;
- }
- if (pid && sep->se_wait) {
- sep->se_wait = pid;
- FD_CLR(sep->se_fd, &allsock);
- nsock--;
- }
- }
- sigprocmask(SIG_SETMASK, &emptymask, NULL);
- if (pid == 0) {
+ {
+ if (sep->se_count++ == 0)
+ (void) gettimeofday (&sep->se_time, NULL);
+ else if (toomany > 0 && sep->se_count >= sep->se_max) {
+ struct timeval now;
+
+ (void) gettimeofday (&now, NULL);
+ if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
+ sep->se_time = now;
+ sep->se_count = 1;
+ } else {
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
+ close (ctrl);
+ if (sep->se_family == AF_INET &&
+ ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
+ /*
+ * Cannot close it -- there are
+ * thieves on the system.
+ * Simply ignore the connection.
+ */
+ --sep->se_count;
+ continue;
+ }
+ syslog (LOG_ERR,
+ "%s/%s server failing (looping), service terminated",
+ sep->se_service, sep->se_proto);
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
+ close (ctrl);
+ FD_CLR (sep->se_fd, &allsock);
+ (void) close (sep->se_fd);
+ sep->se_fd = -1;
+ sep->se_count = 0;
+ nsock--;
+ sigsetmask (0L);
+ if (!timingout) {
+ timingout = 1;
+ alarm (RETRYTIME);
+ }
+ continue;
+ }
+ }
+ pid = fork ();
+ }
+ if (pid < 0) {
+ syslog (LOG_ERR, "fork: %m");
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
+ close (ctrl);
+ sigsetmask (0L);
+ sleep (1);
+ continue;
+ }
+ if (pid && sep->se_wait) {
+ sep->se_wait = pid;
+ FD_CLR (sep->se_fd, &allsock);
+ nsock--;
+ }
+ sigsetmask (0L);
+ if (pid == 0) {
#ifdef INETD_FEATURE_ENABLED
- if (sep->se_bi) {
- (*sep->se_bi->bi_fn)(ctrl, sep);
- } else
+ if (sep->se_bi) {
+ (*sep->se_bi->bi_fn) (ctrl, sep);
+ } else
#endif
- {
- struct passwd *pwd = getpwnam(sep->se_user);
- if (pwd == NULL) {
- syslog_err_and_discard_dg(
- sep->se_socktype,
- "getpwnam: %s: No such user",
- sep->se_user);
- }
- if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) {
- syslog_err_and_discard_dg(sep->se_socktype,
- "getgrnam: %s: No such group", sep->se_group);
- }
- /*
- * Ok. There are four cases here:
- * 1. nonroot user, no group specified
- * 2. nonroot user, some group specified
- * 3. root user, no group specified
- * 4. root user, some group specified
- * In cases 2 and 4 we setgid to the specified
- * group. In cases 1 and 2 we run initgroups
- * to run with the groups of the given user.
- * In case 4 we do setgroups to run with the
- * given group. In case 3 we do nothing.
- */
- if (pwd->pw_uid) {
- if (sep->se_group) {
- pwd->pw_gid = grp->gr_gid;
- }
- setgid((gid_t)pwd->pw_gid);
- initgroups(pwd->pw_name, pwd->pw_gid);
- setuid((uid_t)pwd->pw_uid);
- } else if (sep->se_group) {
- setgid((gid_t)grp->gr_gid);
- setgroups(1, &grp->gr_gid);
- }
- dup2(ctrl, 0);
- close(ctrl);
- dup2(0, 1);
- dup2(0, 2);
-#ifdef RLIMIT_NOFILE
- if (rlim_ofile.rlim_cur != rlim_ofile_cur) {
- if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
- syslog(LOG_ERR,"setrlimit: %m");
- }
- }
-#endif
- for (ctrl = rlim_ofile_cur-1; --ctrl > 2; ) {
- (void)close(ctrl);
- }
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = SIG_DFL;
- sigaction(SIGPIPE, &sa, NULL);
-
- execv(sep->se_server, sep->se_argv);
- syslog_err_and_discard_dg(sep->se_socktype, "execv %s: %m", sep->se_server);
- }
- }
- if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
- close(ctrl);
- }
+ {
+ if ((pwd = getpwnam (sep->se_user)) == NULL) {
+ syslog (LOG_ERR, "getpwnam: %s: No such user", sep->se_user);
+ if (sep->se_socktype != SOCK_STREAM)
+ recv (0, buf, sizeof (buf), 0);
+ _exit (1);
+ }
+ if (setsid () < 0)
+ syslog (LOG_ERR, "%s: setsid: %m", sep->se_service);
+ if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
+ syslog (LOG_ERR, "getgrnam: %s: No such group", sep->se_group);
+ if (sep->se_socktype != SOCK_STREAM)
+ recv (0, buf, sizeof (buf), 0);
+ _exit (1);
+ }
+ if (uid != 0) {
+ /* a user running private inetd */
+ if (uid != pwd->pw_uid)
+ _exit (1);
+ } else if (pwd->pw_uid) {
+ if (sep->se_group) {
+ pwd->pw_gid = grp->gr_gid;
+ }
+ setgid ((gid_t) pwd->pw_gid);
+ initgroups (pwd->pw_name, pwd->pw_gid);
+ setuid ((uid_t) pwd->pw_uid);
+ } else if (sep->se_group) {
+ setgid (grp->gr_gid);
+ setgroups (1, &grp->gr_gid);
}
+ dup2 (ctrl, 0);
+ close (ctrl);
+ dup2 (0, 1);
+ dup2 (0, 2);
+ if (rlim_ofile.rlim_cur != rlim_ofile_cur)
+ if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
+ syslog (LOG_ERR, "setrlimit: %m");
+ closelog ();
+ for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
+ (void) close (tmpint);
+ sigaction (SIGPIPE, &sapipe, NULL);
+ execv (sep->se_server, sep->se_argv);
+ if (sep->se_socktype != SOCK_STREAM)
+ recv (0, buf, sizeof (buf), 0);
+ syslog (LOG_ERR, "execv %s: %m", sep->se_server);
+ _exit (1);
+ }
}
- }
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
+ close (ctrl);
+ }
+ }
}
-
/*
* Internet services provided internally by inetd:
*/
#define BUFSIZE 4096
-#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
-/* Echo service -- echo data back */
-static void echo_stream(int s, servtab_t *sep)
+#if defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO) || \
+ defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN) || \
+ defined(CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME)
+static int dg_badinput (struct sockaddr_in *dg_sin)
{
- char buffer[BUFSIZE];
- int i;
-
- setproctitle(sep->se_service, s);
- while ((i = read(s, buffer, sizeof(buffer))) > 0 &&
- write(s, buffer, i) > 0)
- ;
- exit(0);
+ if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED)
+ return (1);
+ if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST))
+ return (1);
+ /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
+ return (0);
}
+#endif
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
/* Echo service -- echo data back */
-static void echo_dg(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+echo_stream (int s, servtab_t *sep)
{
- char buffer[BUFSIZE];
- int i;
- socklen_t size;
- struct sockaddr sa;
-
- (void)sep;
+ char buffer[BUFSIZE];
+ int i;
- size = sizeof(sa);
- if ((i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size)) < 0)
- return;
- (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
+ inetd_setproctitle (sep->se_service, s);
+ while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
+ write (s, buffer, i) > 0);
+ exit (0);
}
-#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO */
+/* Echo service -- echo data back */
+/* ARGSUSED */
+static void
+echo_dg (int s, servtab_t *sep __attribute__((unused)))
+{
+ char buffer[BUFSIZE];
+ int i, size;
+ /* struct sockaddr_storage ss; */
+ struct sockaddr sa;
+
+ size = sizeof (sa);
+ if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
+ return;
+ if (dg_badinput ((struct sockaddr_in *) &sa))
+ return;
+ (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
/* Discard service -- ignore data */
-static void discard_stream(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+discard_stream (int s, servtab_t *sep)
{
- char buffer[BUFSIZE];
+ char buffer[BUFSIZE];
- setproctitle(sep->se_service, s);
- while ((errno = 0, read(s, buffer, sizeof(buffer)) > 0) ||
- errno == EINTR)
- ;
- exit(0);
+ inetd_setproctitle (sep->se_service, s);
+ while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
+ errno == EINTR);
+ exit (0);
}
/* Discard service -- ignore data */
-static void discard_dg(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+discard_dg (int s, servtab_t *sep __attribute__((unused)))
{
- char buffer[BUFSIZE];
- (void)sep;
- read(s, buffer, sizeof(buffer));
+ char buffer[BUFSIZE];
+
+ (void) read (s, buffer, sizeof (buffer));
}
-#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD */
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
-#include <ctype.h>
#define LINESIZ 72
static char ring[128];
static char *endring;
-static void initring(void)
+static void
+initring (void)
{
- int i;
+ int i;
- endring = ring;
+ endring = ring;
- for (i = 0; i <= 128; ++i)
- if (isprint(i))
- *endring++ = i;
+ for (i = 0; i <= 128; ++i)
+ if (isprint (i))
+ *endring++ = i;
}
/* Character generator */
-static void chargen_stream(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+chargen_stream (int s, servtab_t *sep)
{
- char *rs;
- int len;
- char text[LINESIZ+2];
+ char *rs;
+ int len;
+ char text[LINESIZ + 2];
- setproctitle(sep->se_service, s);
+ inetd_setproctitle (sep->se_service, s);
- if (!endring) {
- initring();
- rs = ring;
- }
+ if (!endring) {
+ initring ();
+ rs = ring;
+ }
- text[LINESIZ] = '\r';
- text[LINESIZ + 1] = '\n';
- for (rs = ring;;) {
- if ((len = endring - rs) >= LINESIZ)
- memcpy(text, rs, LINESIZ);
- else {
- memcpy(text, rs, len);
- memcpy(text + len, ring, LINESIZ - len);
- }
- if (++rs == endring)
- rs = ring;
- if (write(s, text, sizeof(text)) != sizeof(text))
- break;
+ text[LINESIZ] = '\r';
+ text[LINESIZ + 1] = '\n';
+ for (rs = ring;;) {
+ if ((len = endring - rs) >= LINESIZ)
+ memmove (text, rs, LINESIZ);
+ else {
+ memmove (text, rs, len);
+ memmove (text + len, ring, LINESIZ - len);
}
- exit(0);
+ if (++rs == endring)
+ rs = ring;
+ if (write (s, text, sizeof (text)) != sizeof (text))
+ break;
+ }
+ exit (0);
}
/* Character generator */
-static void chargen_dg(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+chargen_dg (int s, servtab_t *sep __attribute__((unused)))
{
- struct sockaddr sa;
- static char *rs;
- size_t len;
- socklen_t size;
- char text[LINESIZ+2];
-
- (void)sep;
-
- if (endring == 0) {
- initring();
- rs = ring;
- }
-
- size = sizeof(sa);
- if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
- return;
-
- if ((len = endring - rs) >= LINESIZ)
- memcpy(text, rs, LINESIZ);
- else {
- memcpy(text, rs, len);
- memcpy(text + len, ring, LINESIZ - len);
- }
- if (++rs == endring)
- rs = ring;
- text[LINESIZ] = '\r';
- text[LINESIZ + 1] = '\n';
- (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
+ /* struct sockaddr_storage ss; */
+ struct sockaddr sa;
+ static char *rs;
+ int len, size;
+ char text[LINESIZ + 2];
+
+ if (endring == 0) {
+ initring ();
+ rs = ring;
+ }
+
+ size = sizeof (sa);
+ if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
+ return;
+ if (dg_badinput ((struct sockaddr_in *) &sa))
+ return;
+
+ if ((len = endring - rs) >= LINESIZ)
+ memmove (text, rs, LINESIZ);
+ else {
+ memmove (text, rs, len);
+ memmove (text + len, ring, LINESIZ - len);
+ }
+ if (++rs == endring)
+ rs = ring;
+ text[LINESIZ] = '\r';
+ text[LINESIZ + 1] = '\n';
+ (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
}
#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN */
* some seventy years Bell Labs was asleep.
*/
-static long machtime(void)
+static u_int machtime (void)
{
- struct timeval tv;
+ struct timeval tv;
- if (gettimeofday(&tv, (struct timezone *)0) < 0) {
- fprintf(stderr, "Unable to get time of day\n");
- return (0L);
- }
- return (htonl((long)tv.tv_sec + 2208988800UL));
+ if (gettimeofday (&tv, NULL) < 0) {
+ fprintf (stderr, "Unable to get time of day\n");
+ return (0L);
+ }
+ return (htonl ((u_int) tv.tv_sec + 2208988800UL));
}
-static void machtime_stream(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+machtime_stream (int s, servtab_t *sep __attribute__((unused)))
{
- long result;
- (void)sep;
+ u_int result;
- result = machtime();
- write(s, (char *) &result, sizeof(result));
+ result = machtime ();
+ (void) write (s, (char *) &result, sizeof (result));
}
-static void machtime_dg(int s, servtab_t *sep)
+/* ARGSUSED */
+static void
+machtime_dg (int s, servtab_t *sep __attribute__((unused)))
{
- long result;
- struct sockaddr sa;
- socklen_t size;
- (void)sep;
-
- size = sizeof(sa);
- if (recvfrom(s, (char *)&result, sizeof(result), 0, &sa, &size) < 0)
- return;
- result = machtime();
- (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
+ u_int result;
+ /* struct sockaddr_storage ss; */
+ struct sockaddr sa;
+ struct sockaddr_in *dg_sin;
+ int size;
+
+ size = sizeof (sa);
+ if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
+ return;
+ /* if (dg_badinput((struct sockaddr *)&ss)) */
+ dg_sin = (struct sockaddr_in *) &sa;
+ if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
+ ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
+ return;
+ result = machtime ();
+ (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
}
#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME */
#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
/* Return human-readable time of day */
-static int human_readable_time_sprintf(char *buffer)
-{
- time_t clocc = time(NULL);
-
- return sprintf(buffer, "%.24s\r\n", ctime(&clocc));
-}
-
-static void daytime_stream(int s, servtab_t *sep)
+/* ARGSUSED */
+static void daytime_stream (int s, servtab_t *sep __attribute__((unused)))
{
- char buffer[256];
- size_t st = human_readable_time_sprintf(buffer);
+ char buffer[256];
+ time_t t;
- (void)sep;
+ t = time (NULL);
- write(s, buffer, st);
+ (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
+ (void) write (s, buffer, strlen (buffer));
}
/* Return human-readable time of day */
-static void daytime_dg(int s, servtab_t *sep)
+/* ARGSUSED */
+void
+daytime_dg (int s, servtab_t *sep __attribute__((unused)))
{
- char buffer[256];
- struct sockaddr sa;
- socklen_t size;
-
- (void)sep;
-
- size = sizeof(sa);
- if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
- return;
- size = human_readable_time_sprintf(buffer);
- sendto(s, buffer, size, 0, &sa, sizeof(sa));
+ char buffer[256];
+ time_t t;
+ /* struct sockaddr_storage ss; */
+ struct sockaddr sa;
+ int size;
+
+ t = time ((time_t *) 0);
+
+ size = sizeof (sa);
+ if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
+ return;
+ if (dg_badinput ((struct sockaddr_in *) &sa))
+ return;
+ (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
+ (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
}
#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME */
projects / oweals / busybox.git / commitdiff