"Robert P. J. Day" | 63fc1a9 | 2006-07-02 19:47:05 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 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> */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 6 | /* |
| 7 | * Copyright (c) 1983,1991 The Regents of the University of California. |
| 8 | * All rights reserved. |
| 9 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 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. |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 25 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 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 |
| 36 | * SUCH DAMAGE. |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * Inetd - Internet super-server |
| 41 | * |
| 42 | * This program invokes all internet services as needed. |
| 43 | * connection-oriented services are invoked each time a |
| 44 | * connection is made, by creating a process. This process |
| 45 | * is passed the connection as file descriptor 0 and is |
| 46 | * expected to do a getpeername to find out the source host |
| 47 | * and port. |
| 48 | * |
| 49 | * Datagram oriented services are invoked when a datagram |
| 50 | * arrives; a process is created and passed a pending message |
| 51 | * on file descriptor 0. Datagram servers may either connect |
| 52 | * to their peer, freeing up the original socket for inetd |
| 53 | * to receive further messages on, or ``take over the socket'', |
| 54 | * processing all arriving datagrams and, eventually, timing |
| 55 | * out. The first type of server is said to be ``multi-threaded''; |
| 56 | * the second type of server ``single-threaded''. |
| 57 | * |
| 58 | * Inetd uses a configuration file which is read at startup |
| 59 | * and, possibly, at some later time in response to a hangup signal. |
| 60 | * The configuration file is ``free format'' with fields given in the |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 61 | * order shown below. Continuation lines for an entry must begin with |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 62 | * a space or tab. All fields must be present in each entry. |
| 63 | * |
| 64 | * service name must be in /etc/services |
| 65 | * socket type stream/dgram/raw/rdm/seqpacket |
| 66 | * protocol must be in /etc/protocols |
| 67 | * wait/nowait[.max] single-threaded/multi-threaded, max # |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 68 | * user[.group] or user[:group] user/group to run daemon as |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 69 | * server program full path name |
| 70 | * server program arguments maximum of MAXARGS (20) |
| 71 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 72 | * For RPC services |
| 73 | * service name/version must be in /etc/rpc |
| 74 | * socket type stream/dgram/raw/rdm/seqpacket |
| 75 | * protocol must be in /etc/protocols |
| 76 | * wait/nowait[.max] single-threaded/multi-threaded |
| 77 | * user[.group] or user[:group] user to run daemon as |
| 78 | * server program full path name |
| 79 | * server program arguments maximum of MAXARGS (20) |
| 80 | * |
| 81 | * For non-RPC services, the "service name" can be of the form |
| 82 | * hostaddress:servicename, in which case the hostaddress is used |
| 83 | * as the host portion of the address to listen on. If hostaddress |
| 84 | * consists of a single `*' character, INADDR_ANY is used. |
| 85 | * |
| 86 | * A line can also consist of just |
| 87 | * hostaddress: |
| 88 | * where hostaddress is as in the preceding paragraph. Such a line must |
| 89 | * have no further fields; the specified hostaddress is remembered and |
| 90 | * used for all further lines that have no hostaddress specified, |
| 91 | * until the next such line (or EOF). (This is why * is provided to |
| 92 | * allow explicit specification of INADDR_ANY.) A line |
| 93 | * *: |
| 94 | * is implicitly in effect at the beginning of the file. |
| 95 | * |
| 96 | * The hostaddress specifier may (and often will) contain dots; |
| 97 | * the service name must not. |
| 98 | * |
| 99 | * For RPC services, host-address specifiers are accepted and will |
| 100 | * work to some extent; however, because of limitations in the |
| 101 | * portmapper interface, it will not work to try to give more than |
| 102 | * one line for any given RPC service, even if the host-address |
| 103 | * specifiers are different. |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 104 | * |
| 105 | * Comment lines are indicated by a `#' in column 1. |
| 106 | */ |
| 107 | |
| 108 | /* |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 109 | * Here's the scoop concerning the user[.:]group feature: |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 110 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 111 | * 1) set-group-option off. |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 112 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 113 | * a) user = root: NO setuid() or setgid() is done |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 114 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 115 | * b) other: setgid(primary group as found in passwd) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 116 | * initgroups(name, primary group) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 117 | * setuid() |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 118 | * |
| 119 | * 2) set-group-option on. |
| 120 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 121 | * a) user = root: setgid(specified group) |
| 122 | * NO initgroups() |
| 123 | * NO setuid() |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 124 | * |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 125 | * b) other: setgid(specified group) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 126 | * initgroups(name, specified group) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 127 | * setuid() |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 128 | * |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 129 | */ |
| 130 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 131 | #include "busybox.h" |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 132 | #include <syslog.h> |
Rob Landley | 099ed50 | 2006-08-28 09:41:49 +0000 | [diff] [blame] | 133 | #include <sys/un.h> |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 134 | |
| 135 | //#define CONFIG_FEATURE_INETD_RPC |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 136 | //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
| 137 | //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
| 138 | //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
| 139 | //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
| 140 | //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 141 | //#define CONFIG_FEATURE_IPV6 |
| 142 | |
| 143 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 144 | #include <rpc/rpc.h> |
| 145 | #include <rpc/pmap_clnt.h> |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 146 | #endif |
| 147 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 148 | #define _PATH_INETDCONF "/etc/inetd.conf" |
| 149 | #define _PATH_INETDPID "/var/run/inetd.pid" |
| 150 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 151 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 152 | #define TOOMANY 0 /* don't start more than TOOMANY */ |
| 153 | |
| 154 | #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */ |
| 155 | #define RETRYTIME (60*10) /* retry after bind or server fail */ |
| 156 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 157 | #ifndef RLIMIT_NOFILE |
| 158 | #define RLIMIT_NOFILE RLIMIT_OFILE |
| 159 | #endif |
| 160 | |
| 161 | #ifndef OPEN_MAX |
| 162 | #define OPEN_MAX 64 |
| 163 | #endif |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 164 | |
| 165 | /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 166 | #define FD_MARGIN (8) |
| 167 | static rlim_t rlim_ofile_cur = OPEN_MAX; |
| 168 | static struct rlimit rlim_ofile; |
| 169 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 170 | |
Glenn L McGrath | b1207b3 | 2003-02-10 22:31:09 +0000 | [diff] [blame] | 171 | /* Check unsupporting builtin */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 172 | #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \ |
| 173 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \ |
| 174 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \ |
| 175 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \ |
| 176 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
Glenn L McGrath | c3b134f | 2004-01-17 01:26:53 +0000 | [diff] [blame] | 177 | # define INETD_FEATURE_ENABLED |
Glenn L McGrath | b1207b3 | 2003-02-10 22:31:09 +0000 | [diff] [blame] | 178 | #endif |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 179 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 180 | #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \ |
| 181 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \ |
| 182 | defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 183 | # define INETD_SETPROCTITLE |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 184 | #endif |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 185 | |
| 186 | typedef struct servtab |
| 187 | { |
| 188 | char *se_hostaddr; /* host address to listen on */ |
| 189 | char *se_service; /* name of service */ |
| 190 | int se_socktype; /* type of socket to use */ |
| 191 | int se_family; /* address family */ |
| 192 | char *se_proto; /* protocol used */ |
| 193 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 194 | int se_rpcprog; /* rpc program number */ |
| 195 | int se_rpcversl; /* rpc program lowest version */ |
| 196 | int se_rpcversh; /* rpc program highest version */ |
| 197 | #define isrpcservice(sep) ((sep)->se_rpcversl != 0) |
| 198 | #else |
| 199 | #define isrpcservice(sep) 0 |
| 200 | #endif |
| 201 | pid_t se_wait; /* single threaded server */ |
| 202 | short se_checked; /* looked at during merge */ |
| 203 | char *se_user; /* user name to run as */ |
| 204 | char *se_group; /* group name to run as */ |
| 205 | #ifdef INETD_FEATURE_ENABLED |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 206 | const struct builtin *se_bi; /* if built-in, description */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 207 | #endif |
| 208 | char *se_server; /* server program */ |
| 209 | #define MAXARGV 20 |
| 210 | char *se_argv[MAXARGV + 1]; /* program arguments */ |
| 211 | int se_fd; /* open descriptor */ |
| 212 | union |
| 213 | { |
| 214 | struct sockaddr se_un_ctrladdr; |
| 215 | struct sockaddr_in se_un_ctrladdr_in; |
| 216 | #ifdef CONFIG_FEATURE_IPV6 |
| 217 | struct sockaddr_in6 se_un_ctrladdr_in6; |
| 218 | #endif |
| 219 | struct sockaddr_un se_un_ctrladdr_un; |
| 220 | } se_un; /* bound address */ |
| 221 | #define se_ctrladdr se_un.se_un_ctrladdr |
| 222 | #define se_ctrladdr_in se_un.se_un_ctrladdr_in |
| 223 | #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6 |
| 224 | #define se_ctrladdr_un se_un.se_un_ctrladdr_un |
| 225 | int se_ctrladdr_size; |
| 226 | int se_max; /* max # of instances of this service */ |
| 227 | int se_count; /* number started since se_time */ |
| 228 | struct timeval se_time; /* start of se_count */ |
| 229 | struct servtab *se_next; |
Glenn L McGrath | 03a0643 | 2004-02-18 13:19:58 +0000 | [diff] [blame] | 230 | } servtab_t; |
| 231 | |
| 232 | static servtab_t *servtab; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 233 | |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 234 | #ifdef INETD_FEATURE_ENABLED |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 235 | struct builtin |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 236 | { |
| 237 | const char *bi_service; /* internally provided service name */ |
| 238 | int bi_socktype; /* type of socket supported */ |
| 239 | short bi_fork; /* 1 if should fork before call */ |
| 240 | short bi_wait; /* 1 if should wait for child */ |
| 241 | void (*bi_fn) (int, servtab_t *); |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 242 | }; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 243 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 244 | /* Echo received data */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 245 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 246 | static void echo_stream (int, servtab_t *); |
| 247 | static void echo_dg (int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 248 | #endif |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 249 | /* Internet /dev/null */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 250 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 251 | static void discard_stream (int, servtab_t *); |
| 252 | static void discard_dg (int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 253 | #endif |
| 254 | /* Return 32 bit time since 1900 */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 255 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 256 | static void machtime_stream (int, servtab_t *); |
| 257 | static void machtime_dg (int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 258 | #endif |
| 259 | /* Return human-readable time */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 260 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 261 | static void daytime_stream (int, servtab_t *); |
| 262 | static void daytime_dg (int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 263 | #endif |
| 264 | /* Familiar character generator */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 265 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 266 | static void chargen_stream (int, servtab_t *); |
| 267 | static void chargen_dg (int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 268 | #endif |
| 269 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 270 | static const struct builtin builtins[] = { |
| 271 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 272 | /* Echo received data */ |
| 273 | {"echo", SOCK_STREAM, 1, 0, echo_stream,}, |
| 274 | {"echo", SOCK_DGRAM, 0, 0, echo_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 275 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 276 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 277 | /* Internet /dev/null */ |
| 278 | {"discard", SOCK_STREAM, 1, 0, discard_stream,}, |
| 279 | {"discard", SOCK_DGRAM, 0, 0, discard_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 280 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 281 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 282 | /* Return 32 bit time since 1900 */ |
| 283 | {"time", SOCK_STREAM, 0, 0, machtime_stream,}, |
| 284 | {"time", SOCK_DGRAM, 0, 0, machtime_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 285 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 286 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 287 | /* Return human-readable time */ |
| 288 | {"daytime", SOCK_STREAM, 0, 0, daytime_stream,}, |
| 289 | {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 290 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 291 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 292 | /* Familiar character generator */ |
| 293 | {"chargen", SOCK_STREAM, 1, 0, chargen_stream,}, |
| 294 | {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 295 | #endif |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 296 | {NULL, 0, 0, 0, NULL} |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 297 | }; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 298 | #endif /* INETD_FEATURE_ENABLED */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 299 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 300 | static int global_queuelen = 128; |
| 301 | static int nsock, maxsock; |
| 302 | static fd_set allsock; |
| 303 | static int toomany = TOOMANY; |
| 304 | static int timingout; |
| 305 | static struct servent *sp; |
| 306 | static uid_t uid; |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 307 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 308 | static char *CONFIG = _PATH_INETDCONF; |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 309 | |
| 310 | static FILE *fconfig; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 311 | static char line[1024]; |
| 312 | static char *defhost; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 313 | |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 314 | /* xstrdup(NULL) returns NULL, but this one |
| 315 | * will return newly-allocated "" if called with NULL arg |
| 316 | * TODO: audit whether this makes any real difference |
| 317 | */ |
| 318 | static char *xxstrdup (char *cp) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 319 | { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 320 | return xstrdup (cp ? cp : ""); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 321 | } |
| 322 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 323 | static int setconfig (void) |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 324 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 325 | free (defhost); |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 326 | defhost = xstrdup ("*"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 327 | if (fconfig != NULL) { |
| 328 | fseek (fconfig, 0L, SEEK_SET); |
| 329 | return (1); |
| 330 | } |
| 331 | fconfig = fopen (CONFIG, "r"); |
| 332 | return (fconfig != NULL); |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 333 | } |
| 334 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 335 | static void endconfig (void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 336 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 337 | if (fconfig) { |
| 338 | (void) fclose (fconfig); |
| 339 | fconfig = NULL; |
| 340 | } |
| 341 | free (defhost); |
| 342 | defhost = 0; |
| 343 | } |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 344 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 345 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 346 | static void register_rpc (servtab_t *sep) |
| 347 | { |
| 348 | int n; |
| 349 | struct sockaddr_in ir_sin; |
| 350 | struct protoent *pp; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 351 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 352 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 353 | if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 354 | bb_perror_msg ("%s: getproto", sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 355 | return; |
| 356 | } |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 357 | size = sizeof ir_sin; |
| 358 | if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 359 | bb_perror_msg ("%s/%s: getsockname", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 360 | sep->se_service, sep->se_proto); |
| 361 | return; |
| 362 | } |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 363 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 364 | for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) { |
| 365 | (void) pmap_unset (sep->se_rpcprog, n); |
| 366 | if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port))) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 367 | bb_perror_msg ("%s %s: pmap_set: %u %u %u %u", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 368 | sep->se_service, sep->se_proto, |
| 369 | sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)); |
| 370 | } |
| 371 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 372 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 373 | static void unregister_rpc (servtab_t *sep) |
| 374 | { |
| 375 | int n; |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 376 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 377 | for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) { |
| 378 | if (!pmap_unset (sep->se_rpcprog, n)) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 379 | bb_error_msg ("pmap_unset(%u, %u)", sep->se_rpcprog, n); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 380 | } |
| 381 | } |
| 382 | #endif /* CONFIG_FEATURE_INETD_RPC */ |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 383 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 384 | static void freeconfig (servtab_t *cp) |
| 385 | { |
| 386 | int i; |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 387 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 388 | free (cp->se_hostaddr); |
| 389 | free (cp->se_service); |
| 390 | free (cp->se_proto); |
| 391 | free (cp->se_user); |
| 392 | free (cp->se_group); |
| 393 | free (cp->se_server); |
| 394 | for (i = 0; i < MAXARGV; i++) |
Rob Landley | e7c43b6 | 2006-03-01 16:39:45 +0000 | [diff] [blame] | 395 | free (cp->se_argv[i]); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 396 | } |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 397 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 398 | static int bump_nofile (void) |
| 399 | { |
| 400 | #define FD_CHUNK 32 |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 401 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 402 | struct rlimit rl; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 403 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 404 | if (getrlimit (RLIMIT_NOFILE, &rl) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 405 | bb_perror_msg ("getrlimit"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 406 | return -1; |
| 407 | } |
| 408 | rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK); |
| 409 | rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK); |
| 410 | if (rl.rlim_cur <= rlim_ofile_cur) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 411 | bb_error_msg ("bump_nofile: cannot extend file limit, max = %d", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 412 | (int) rl.rlim_cur); |
| 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | if (setrlimit (RLIMIT_NOFILE, &rl) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 417 | bb_perror_msg ("setrlimit"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 418 | return -1; |
| 419 | } |
| 420 | |
| 421 | rlim_ofile_cur = rl.rlim_cur; |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | static void setup (servtab_t *sep) |
| 426 | { |
| 427 | int on = 1; |
| 428 | int r; |
| 429 | |
| 430 | if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 431 | bb_perror_msg ("%s/%s: socket", sep->se_service, sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 432 | return; |
| 433 | } |
| 434 | #define turnon(fd, opt) \ |
| 435 | setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on)) |
| 436 | if (turnon (sep->se_fd, SO_REUSEADDR) < 0) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 437 | bb_perror_msg ("setsockopt (SO_REUSEADDR)"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 438 | #undef turnon |
| 439 | |
| 440 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 441 | if (isrpcservice (sep)) { |
| 442 | struct passwd *pwd; |
| 443 | |
| 444 | /* |
| 445 | * for RPC services, attempt to use a reserved port |
| 446 | * if they are going to be running as root. |
| 447 | * |
| 448 | * Also, zero out the port for all RPC services; let bind() |
| 449 | * find one. |
| 450 | */ |
| 451 | sep->se_ctrladdr_in.sin_port = 0; |
| 452 | if (sep->se_user && (pwd = getpwnam (sep->se_user)) && |
| 453 | pwd->pw_uid == 0 && uid == 0) |
| 454 | r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in); |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 455 | else { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 456 | r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size); |
| 457 | if (r == 0) { |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 458 | socklen_t len = sep->se_ctrladdr_size; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 459 | int saveerrno = errno; |
| 460 | |
| 461 | /* update se_ctrladdr_in.sin_port */ |
| 462 | r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len); |
| 463 | if (r <= 0) |
| 464 | errno = saveerrno; |
| 465 | } |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 466 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 467 | } else |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 468 | #endif |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 469 | r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size); |
| 470 | if (r < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 471 | bb_perror_msg ("%s/%s (%d): bind", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 472 | sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family); |
| 473 | close (sep->se_fd); |
| 474 | sep->se_fd = -1; |
| 475 | if (!timingout) { |
| 476 | timingout = 1; |
| 477 | alarm (RETRYTIME); |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 478 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 479 | return; |
| 480 | } |
| 481 | if (sep->se_socktype == SOCK_STREAM) |
| 482 | listen (sep->se_fd, global_queuelen); |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 483 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 484 | FD_SET (sep->se_fd, &allsock); |
| 485 | nsock++; |
| 486 | if (sep->se_fd > maxsock) { |
| 487 | maxsock = sep->se_fd; |
| 488 | if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN) |
| 489 | bump_nofile (); |
| 490 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 491 | } |
| 492 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 493 | static char *nextline (void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 494 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 495 | char *cp; |
| 496 | FILE *fd = fconfig; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 497 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 498 | if (fgets (line, sizeof (line), fd) == NULL) |
| 499 | return (NULL); |
| 500 | cp = strchr (line, '\n'); |
| 501 | if (cp) |
| 502 | *cp = '\0'; |
| 503 | return (line); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 504 | } |
| 505 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 506 | static char *skip (char **cpp) /* int report; */ |
| 507 | { |
| 508 | char *cp = *cpp; |
| 509 | char *start; |
| 510 | |
| 511 | /* erp: */ |
| 512 | if (*cpp == NULL) { |
| 513 | /* if (report) */ |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 514 | /* bb_error_msg ("syntax error in inetd config file"); */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 515 | return (NULL); |
| 516 | } |
| 517 | |
| 518 | again: |
| 519 | while (*cp == ' ' || *cp == '\t') |
| 520 | cp++; |
| 521 | if (*cp == '\0') { |
| 522 | int c; |
| 523 | |
| 524 | c = getc (fconfig); |
| 525 | (void) ungetc (c, fconfig); |
| 526 | if (c == ' ' || c == '\t') |
| 527 | if ((cp = nextline ())) |
| 528 | goto again; |
| 529 | *cpp = NULL; |
| 530 | /* goto erp; */ |
| 531 | return (NULL); |
| 532 | } |
| 533 | start = cp; |
| 534 | while (*cp && *cp != ' ' && *cp != '\t') |
| 535 | cp++; |
| 536 | if (*cp != '\0') |
| 537 | *cp++ = '\0'; |
| 538 | /* if ((*cpp = cp) == NULL) */ |
| 539 | /* goto erp; */ |
| 540 | |
| 541 | *cpp = cp; |
| 542 | return (start); |
| 543 | } |
| 544 | |
| 545 | static servtab_t *new_servtab(void) |
| 546 | { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 547 | return xmalloc (sizeof (servtab_t)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | static servtab_t *dupconfig (servtab_t *sep) |
| 551 | { |
| 552 | servtab_t *newtab; |
| 553 | int argc; |
| 554 | |
| 555 | newtab = new_servtab(); |
| 556 | memset (newtab, 0, sizeof (servtab_t)); |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 557 | newtab->se_service = xstrdup (sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 558 | newtab->se_socktype = sep->se_socktype; |
| 559 | newtab->se_family = sep->se_family; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 560 | newtab->se_proto = xstrdup (sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 561 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 562 | newtab->se_rpcprog = sep->se_rpcprog; |
| 563 | newtab->se_rpcversl = sep->se_rpcversl; |
| 564 | newtab->se_rpcversh = sep->se_rpcversh; |
| 565 | #endif |
| 566 | newtab->se_wait = sep->se_wait; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 567 | newtab->se_user = xstrdup (sep->se_user); |
| 568 | newtab->se_group = xstrdup (sep->se_group); |
Glenn L McGrath | c3b134f | 2004-01-17 01:26:53 +0000 | [diff] [blame] | 569 | #ifdef INETD_FEATURE_ENABLED |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 570 | newtab->se_bi = sep->se_bi; |
| 571 | #endif |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 572 | newtab->se_server = xstrdup (sep->se_server); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 573 | |
| 574 | for (argc = 0; argc <= MAXARGV; argc++) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 575 | newtab->se_argv[argc] = xstrdup (sep->se_argv[argc]); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 576 | newtab->se_max = sep->se_max; |
| 577 | |
| 578 | return (newtab); |
| 579 | } |
| 580 | |
| 581 | static servtab_t *getconfigent (void) |
| 582 | { |
| 583 | servtab_t *sep; |
| 584 | int argc; |
| 585 | char *cp, *arg; |
| 586 | char *hostdelim; |
| 587 | servtab_t *nsep; |
| 588 | servtab_t *psep; |
| 589 | |
| 590 | sep = new_servtab(); |
| 591 | |
| 592 | /* memset(sep, 0, sizeof *sep); */ |
| 593 | more: |
| 594 | /* freeconfig(sep); */ |
| 595 | |
| 596 | while ((cp = nextline ()) && *cp == '#'); |
| 597 | if (cp == NULL) { |
| 598 | /* free(sep); */ |
| 599 | return (NULL); |
| 600 | } |
| 601 | |
| 602 | memset ((char *) sep, 0, sizeof *sep); |
| 603 | arg = skip (&cp); |
| 604 | if (arg == NULL) { |
| 605 | /* A blank line. */ |
| 606 | goto more; |
| 607 | } |
| 608 | |
| 609 | /* Check for a host name. */ |
| 610 | hostdelim = strrchr (arg, ':'); |
| 611 | if (hostdelim) { |
| 612 | *hostdelim = '\0'; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 613 | sep->se_hostaddr = xstrdup (arg); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 614 | arg = hostdelim + 1; |
| 615 | /* |
| 616 | * If the line is of the form `host:', then just change the |
| 617 | * default host for the following lines. |
| 618 | */ |
| 619 | if (*arg == '\0') { |
| 620 | arg = skip (&cp); |
| 621 | if (cp == NULL) { |
| 622 | free (defhost); |
| 623 | defhost = sep->se_hostaddr; |
| 624 | goto more; |
| 625 | } |
| 626 | } |
| 627 | } else |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 628 | sep->se_hostaddr = xxstrdup (defhost); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 629 | |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 630 | sep->se_service = xxstrdup (arg); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 631 | arg = skip (&cp); |
| 632 | |
| 633 | if (strcmp (arg, "stream") == 0) |
| 634 | sep->se_socktype = SOCK_STREAM; |
| 635 | else if (strcmp (arg, "dgram") == 0) |
| 636 | sep->se_socktype = SOCK_DGRAM; |
| 637 | else if (strcmp (arg, "rdm") == 0) |
| 638 | sep->se_socktype = SOCK_RDM; |
| 639 | else if (strcmp (arg, "seqpacket") == 0) |
| 640 | sep->se_socktype = SOCK_SEQPACKET; |
| 641 | else if (strcmp (arg, "raw") == 0) |
| 642 | sep->se_socktype = SOCK_RAW; |
| 643 | else |
| 644 | sep->se_socktype = -1; |
| 645 | |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 646 | sep->se_proto = xxstrdup (skip (&cp)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 647 | |
| 648 | if (strcmp (sep->se_proto, "unix") == 0) { |
| 649 | sep->se_family = AF_UNIX; |
| 650 | } else { |
| 651 | sep->se_family = AF_INET; |
| 652 | if (sep->se_proto[strlen (sep->se_proto) - 1] == '6') |
| 653 | #ifdef CONFIG_FEATURE_IPV6 |
| 654 | sep->se_family = AF_INET6; |
| 655 | #else |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 656 | bb_error_msg ("%s: IPV6 not supported", sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 657 | #endif |
| 658 | if (strncmp (sep->se_proto, "rpc/", 4) == 0) { |
| 659 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 660 | char *p, *ccp; |
| 661 | long l; |
| 662 | |
| 663 | p = strchr (sep->se_service, '/'); |
| 664 | if (p == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 665 | bb_error_msg ("%s: no rpc version", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 666 | goto more; |
| 667 | } |
| 668 | *p++ = '\0'; |
| 669 | l = strtol (p, &ccp, 0); |
| 670 | if (ccp == p || l < 0 || l > INT_MAX) { |
| 671 | badafterall: |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 672 | bb_error_msg ("%s/%s: bad rpc version", sep->se_service, p); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 673 | goto more; |
| 674 | } |
| 675 | sep->se_rpcversl = sep->se_rpcversh = l; |
| 676 | if (*ccp == '-') { |
| 677 | p = ccp + 1; |
| 678 | l = strtol (p, &ccp, 0); |
| 679 | if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp) |
| 680 | goto badafterall; |
| 681 | sep->se_rpcversh = l; |
| 682 | } else if (*ccp != '\0') |
| 683 | goto badafterall; |
| 684 | #else |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 685 | bb_error_msg ("%s: rpc services not supported", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 686 | #endif |
| 687 | } |
| 688 | } |
| 689 | arg = skip (&cp); |
| 690 | if (arg == NULL) |
| 691 | goto more; |
| 692 | |
| 693 | { |
| 694 | char *s = strchr (arg, '.'); |
| 695 | if (s) { |
| 696 | *s++ = '\0'; |
| 697 | sep->se_max = atoi (s); |
| 698 | } else |
| 699 | sep->se_max = toomany; |
| 700 | } |
| 701 | sep->se_wait = strcmp (arg, "wait") == 0; |
| 702 | /* if ((arg = skip(&cp, 1)) == NULL) */ |
| 703 | /* goto more; */ |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 704 | sep->se_user = xxstrdup (skip (&cp)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 705 | arg = strchr (sep->se_user, '.'); |
| 706 | if (arg == NULL) |
| 707 | arg = strchr (sep->se_user, ':'); |
| 708 | if (arg) { |
| 709 | *arg++ = '\0'; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 710 | sep->se_group = xstrdup (arg); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 711 | } |
| 712 | /* if ((arg = skip(&cp, 1)) == NULL) */ |
| 713 | /* goto more; */ |
| 714 | |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 715 | sep->se_server = xxstrdup (skip (&cp)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 716 | if (strcmp (sep->se_server, "internal") == 0) { |
| 717 | #ifdef INETD_FEATURE_ENABLED |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 718 | const struct builtin *bi; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 719 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 720 | for (bi = builtins; bi->bi_service; bi++) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 721 | if (bi->bi_socktype == sep->se_socktype && |
| 722 | strcmp (bi->bi_service, sep->se_service) == 0) |
| 723 | break; |
| 724 | if (bi->bi_service == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 725 | bb_error_msg ("internal service %s unknown", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 726 | goto more; |
| 727 | } |
| 728 | sep->se_bi = bi; |
| 729 | sep->se_wait = bi->bi_wait; |
| 730 | #else |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 731 | bb_perror_msg ("internal service %s unknown", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 732 | goto more; |
| 733 | #endif |
| 734 | } |
| 735 | #ifdef INETD_FEATURE_ENABLED |
| 736 | else |
| 737 | sep->se_bi = NULL; |
| 738 | #endif |
| 739 | argc = 0; |
| 740 | for (arg = skip (&cp); cp; arg = skip (&cp)) { |
| 741 | if (argc < MAXARGV) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 742 | sep->se_argv[argc++] = xxstrdup (arg); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 743 | } |
| 744 | while (argc <= MAXARGV) |
| 745 | sep->se_argv[argc++] = NULL; |
| 746 | |
| 747 | /* |
| 748 | * Now that we've processed the entire line, check if the hostname |
| 749 | * specifier was a comma separated list of hostnames. If so |
| 750 | * we'll make new entries for each address. |
| 751 | */ |
| 752 | while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) { |
| 753 | nsep = dupconfig (sep); |
| 754 | |
| 755 | /* |
| 756 | * NULL terminate the hostname field of the existing entry, |
| 757 | * and make a dup for the new entry. |
| 758 | */ |
| 759 | *hostdelim++ = '\0'; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 760 | nsep->se_hostaddr = xstrdup (hostdelim); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 761 | |
| 762 | nsep->se_next = sep->se_next; |
| 763 | sep->se_next = nsep; |
| 764 | } |
| 765 | |
| 766 | nsep = sep; |
| 767 | while (nsep != NULL) { |
| 768 | nsep->se_checked = 1; |
| 769 | if (nsep->se_family == AF_INET) { |
| 770 | if (!strcmp (nsep->se_hostaddr, "*")) |
| 771 | nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY; |
| 772 | else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) { |
| 773 | struct hostent *hp; |
| 774 | |
| 775 | hp = gethostbyname (nsep->se_hostaddr); |
| 776 | if (hp == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 777 | bb_error_msg ("%s: unknown host", nsep->se_hostaddr); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 778 | nsep->se_checked = 0; |
| 779 | goto skip; |
| 780 | } else if (hp->h_addrtype != AF_INET) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 781 | bb_error_msg ("%s: address isn't an Internet " |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 782 | "address", nsep->se_hostaddr); |
| 783 | nsep->se_checked = 0; |
| 784 | goto skip; |
| 785 | } else { |
| 786 | int i = 1; |
| 787 | |
| 788 | memmove (&nsep->se_ctrladdr_in.sin_addr, |
| 789 | hp->h_addr_list[0], sizeof (struct in_addr)); |
| 790 | while (hp->h_addr_list[i] != NULL) { |
| 791 | psep = dupconfig (nsep); |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 792 | psep->se_hostaddr = xxstrdup (nsep->se_hostaddr); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 793 | psep->se_checked = 1; |
| 794 | memmove (&psep->se_ctrladdr_in.sin_addr, |
| 795 | hp->h_addr_list[i], sizeof (struct in_addr)); |
| 796 | psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in); |
| 797 | i++; |
| 798 | /* Prepend to list, don't want to look up its */ |
| 799 | /* hostname again. */ |
| 800 | psep->se_next = sep; |
| 801 | sep = psep; |
| 802 | } |
| 803 | } |
| 804 | } |
| 805 | } |
| 806 | /* XXX BUG?: is this skip: label supposed to remain? */ |
| 807 | skip: |
| 808 | nsep = nsep->se_next; |
| 809 | } |
| 810 | |
| 811 | /* |
| 812 | * Finally, free any entries which failed the gethostbyname |
| 813 | * check. |
| 814 | */ |
| 815 | psep = NULL; |
| 816 | nsep = sep; |
| 817 | while (nsep != NULL) { |
| 818 | servtab_t *tsep; |
| 819 | |
| 820 | if (nsep->se_checked == 0) { |
| 821 | tsep = nsep; |
| 822 | if (psep == NULL) { |
| 823 | sep = nsep->se_next; |
| 824 | nsep = sep; |
| 825 | } else { |
| 826 | nsep = nsep->se_next; |
| 827 | psep->se_next = nsep; |
| 828 | } |
| 829 | freeconfig (tsep); |
| 830 | } else { |
| 831 | nsep->se_checked = 0; |
| 832 | psep = nsep; |
| 833 | nsep = nsep->se_next; |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | return (sep); |
| 838 | } |
| 839 | |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 840 | #define Block_Using_Signals(m) do { sigemptyset(&m); \ |
| 841 | sigaddset(&m, SIGCHLD); \ |
| 842 | sigaddset(&m, SIGHUP); \ |
| 843 | sigaddset(&m, SIGALRM); \ |
| 844 | sigprocmask(SIG_BLOCK, &m, NULL); \ |
| 845 | } while(0) |
| 846 | |
| 847 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 848 | static servtab_t *enter (servtab_t *cp) |
| 849 | { |
| 850 | servtab_t *sep; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 851 | sigset_t omask; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 852 | |
| 853 | sep = new_servtab(); |
| 854 | *sep = *cp; |
| 855 | sep->se_fd = -1; |
| 856 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 857 | sep->se_rpcprog = -1; |
| 858 | #endif |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 859 | Block_Using_Signals(omask); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 860 | sep->se_next = servtab; |
| 861 | servtab = sep; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 862 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 863 | return (sep); |
| 864 | } |
| 865 | |
| 866 | static int matchconf (servtab_t *old, servtab_t *new) |
| 867 | { |
| 868 | if (strcmp (old->se_service, new->se_service) != 0) |
| 869 | return (0); |
| 870 | |
| 871 | if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0) |
| 872 | return (0); |
| 873 | |
| 874 | if (strcmp (old->se_proto, new->se_proto) != 0) |
| 875 | return (0); |
| 876 | |
| 877 | /* |
| 878 | * If the new servtab is bound to a specific address, check that the |
| 879 | * old servtab is bound to the same entry. If the new service is not |
| 880 | * bound to a specific address then the check of se_hostaddr above |
| 881 | * is sufficient. |
| 882 | */ |
| 883 | |
| 884 | if (old->se_family == AF_INET && new->se_family == AF_INET && |
| 885 | memcmp (&old->se_ctrladdr_in.sin_addr, |
| 886 | &new->se_ctrladdr_in.sin_addr, |
| 887 | sizeof (new->se_ctrladdr_in.sin_addr)) != 0) |
| 888 | return (0); |
| 889 | |
| 890 | #ifdef CONFIG_FEATURE_IPV6 |
| 891 | if (old->se_family == AF_INET6 && new->se_family == AF_INET6 && |
| 892 | memcmp (&old->se_ctrladdr_in6.sin6_addr, |
| 893 | &new->se_ctrladdr_in6.sin6_addr, |
| 894 | sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0) |
| 895 | return (0); |
| 896 | #endif |
| 897 | return (1); |
| 898 | } |
| 899 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 900 | static void config (int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 901 | { |
| 902 | servtab_t *sep, *cp, **sepp; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 903 | sigset_t omask; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 904 | size_t n; |
| 905 | char protoname[10]; |
| 906 | |
| 907 | if (!setconfig ()) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 908 | bb_perror_msg ("%s", CONFIG); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 909 | return; |
| 910 | } |
| 911 | for (sep = servtab; sep; sep = sep->se_next) |
| 912 | sep->se_checked = 0; |
| 913 | cp = getconfigent (); |
| 914 | while (cp != NULL) { |
| 915 | for (sep = servtab; sep; sep = sep->se_next) |
| 916 | if (matchconf (sep, cp)) |
| 917 | break; |
Bernhard Reutner-Fischer | d591a36 | 2006-08-20 17:35:13 +0000 | [diff] [blame] | 918 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 919 | if (sep != 0) { |
| 920 | int i; |
| 921 | |
Mike Frysinger | 23fedb3 | 2005-10-05 00:50:03 +0000 | [diff] [blame] | 922 | #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 923 | |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 924 | Block_Using_Signals(omask); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 925 | /* |
| 926 | * sep->se_wait may be holding the pid of a daemon |
| 927 | * that we're waiting for. If so, don't overwrite |
| 928 | * it unless the config file explicitly says don't |
| 929 | * wait. |
| 930 | */ |
| 931 | if ( |
| 932 | #ifdef INETD_FEATURE_ENABLED |
| 933 | cp->se_bi == 0 && |
| 934 | #endif |
| 935 | (sep->se_wait == 1 || cp->se_wait == 0)) |
| 936 | sep->se_wait = cp->se_wait; |
| 937 | SWAP (int, cp->se_max, sep->se_max); |
| 938 | SWAP (char *, sep->se_user, cp->se_user); |
| 939 | SWAP (char *, sep->se_group, cp->se_group); |
| 940 | SWAP (char *, sep->se_server, cp->se_server); |
| 941 | for (i = 0; i < MAXARGV; i++) |
| 942 | SWAP (char *, sep->se_argv[i], cp->se_argv[i]); |
| 943 | #undef SWAP |
| 944 | |
| 945 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 946 | if (isrpcservice (sep)) |
| 947 | unregister_rpc (sep); |
| 948 | sep->se_rpcversl = cp->se_rpcversl; |
| 949 | sep->se_rpcversh = cp->se_rpcversh; |
| 950 | #endif |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 951 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 952 | freeconfig (cp); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 953 | } else { |
| 954 | sep = enter (cp); |
| 955 | } |
| 956 | sep->se_checked = 1; |
| 957 | |
| 958 | switch (sep->se_family) { |
| 959 | case AF_UNIX: |
| 960 | if (sep->se_fd != -1) |
| 961 | break; |
| 962 | (void) unlink (sep->se_service); |
| 963 | n = strlen (sep->se_service); |
| 964 | if (n > sizeof sep->se_ctrladdr_un.sun_path - 1) |
| 965 | n = sizeof sep->se_ctrladdr_un.sun_path - 1; |
| 966 | safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1); |
| 967 | sep->se_ctrladdr_un.sun_family = AF_UNIX; |
| 968 | sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family; |
| 969 | setup (sep); |
| 970 | break; |
| 971 | case AF_INET: |
| 972 | sep->se_ctrladdr_in.sin_family = AF_INET; |
| 973 | /* se_ctrladdr_in was set in getconfigent */ |
| 974 | sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in; |
| 975 | |
| 976 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 977 | if (isrpcservice (sep)) { |
| 978 | struct rpcent *rp; |
| 979 | |
| 980 | sep->se_rpcprog = atoi (sep->se_service); |
| 981 | if (sep->se_rpcprog == 0) { |
| 982 | rp = getrpcbyname (sep->se_service); |
| 983 | if (rp == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 984 | bb_error_msg ("%s: unknown rpc service", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 985 | goto serv_unknown; |
| 986 | } |
| 987 | sep->se_rpcprog = rp->r_number; |
| 988 | } |
| 989 | if (sep->se_fd == -1) |
| 990 | setup (sep); |
| 991 | if (sep->se_fd != -1) |
| 992 | register_rpc (sep); |
| 993 | } else |
| 994 | #endif |
| 995 | { |
| 996 | u_short port = htons (atoi (sep->se_service)); |
| 997 | |
| 998 | if (!port) { |
| 999 | /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname)); |
| 1000 | if (isdigit (protoname[strlen (protoname) - 1])) |
| 1001 | protoname[strlen (protoname) - 1] = '\0'; |
| 1002 | sp = getservbyname (sep->se_service, protoname); |
| 1003 | if (sp == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1004 | bb_error_msg ("%s/%s: unknown service", |
| 1005 | sep->se_service, sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1006 | goto serv_unknown; |
| 1007 | } |
| 1008 | port = sp->s_port; |
| 1009 | } |
| 1010 | if (port != sep->se_ctrladdr_in.sin_port) { |
| 1011 | sep->se_ctrladdr_in.sin_port = port; |
| 1012 | if (sep->se_fd != -1) { |
| 1013 | FD_CLR (sep->se_fd, &allsock); |
| 1014 | nsock--; |
| 1015 | (void) close (sep->se_fd); |
| 1016 | } |
| 1017 | sep->se_fd = -1; |
| 1018 | } |
| 1019 | if (sep->se_fd == -1) |
| 1020 | setup (sep); |
| 1021 | } |
| 1022 | break; |
| 1023 | #ifdef CONFIG_FEATURE_IPV6 |
| 1024 | case AF_INET6: |
| 1025 | sep->se_ctrladdr_in6.sin6_family = AF_INET6; |
| 1026 | /* se_ctrladdr_in was set in getconfigent */ |
| 1027 | sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6; |
| 1028 | |
| 1029 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 1030 | if (isrpcservice (sep)) { |
| 1031 | struct rpcent *rp; |
| 1032 | |
| 1033 | sep->se_rpcprog = atoi (sep->se_service); |
| 1034 | if (sep->se_rpcprog == 0) { |
| 1035 | rp = getrpcbyname (sep->se_service); |
| 1036 | if (rp == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1037 | bb_error_msg ("%s: unknown rpc service", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1038 | goto serv_unknown; |
| 1039 | } |
| 1040 | sep->se_rpcprog = rp->r_number; |
| 1041 | } |
| 1042 | if (sep->se_fd == -1) |
| 1043 | setup (sep); |
| 1044 | if (sep->se_fd != -1) |
| 1045 | register_rpc (sep); |
| 1046 | } else |
| 1047 | #endif |
| 1048 | { |
| 1049 | u_short port = htons (atoi (sep->se_service)); |
| 1050 | |
| 1051 | if (!port) { |
| 1052 | /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname)); |
| 1053 | if (isdigit (protoname[strlen (protoname) - 1])) |
| 1054 | protoname[strlen (protoname) - 1] = '\0'; |
| 1055 | sp = getservbyname (sep->se_service, protoname); |
| 1056 | if (sp == 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1057 | bb_error_msg ("%s/%s: unknown service", |
| 1058 | sep->se_service, sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1059 | goto serv_unknown; |
| 1060 | } |
| 1061 | port = sp->s_port; |
| 1062 | } |
| 1063 | if (port != sep->se_ctrladdr_in6.sin6_port) { |
| 1064 | sep->se_ctrladdr_in6.sin6_port = port; |
| 1065 | if (sep->se_fd != -1) { |
| 1066 | FD_CLR (sep->se_fd, &allsock); |
| 1067 | nsock--; |
| 1068 | (void) close (sep->se_fd); |
| 1069 | } |
| 1070 | sep->se_fd = -1; |
| 1071 | } |
| 1072 | if (sep->se_fd == -1) |
| 1073 | setup (sep); |
| 1074 | } |
| 1075 | break; |
| 1076 | #endif /* CONFIG_FEATURE_IPV6 */ |
| 1077 | } |
| 1078 | serv_unknown: |
| 1079 | if (cp->se_next != NULL) { |
| 1080 | servtab_t *tmp = cp; |
| 1081 | |
| 1082 | cp = cp->se_next; |
| 1083 | free (tmp); |
| 1084 | } else { |
| 1085 | free (cp); |
| 1086 | cp = getconfigent (); |
| 1087 | } |
| 1088 | } |
| 1089 | endconfig (); |
| 1090 | /* |
| 1091 | * Purge anything not looked at above. |
| 1092 | */ |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1093 | Block_Using_Signals(omask); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1094 | sepp = &servtab; |
| 1095 | while ((sep = *sepp)) { |
| 1096 | if (sep->se_checked) { |
| 1097 | sepp = &sep->se_next; |
| 1098 | continue; |
| 1099 | } |
| 1100 | *sepp = sep->se_next; |
| 1101 | if (sep->se_fd != -1) { |
| 1102 | FD_CLR (sep->se_fd, &allsock); |
| 1103 | nsock--; |
| 1104 | (void) close (sep->se_fd); |
| 1105 | } |
| 1106 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 1107 | if (isrpcservice (sep)) |
| 1108 | unregister_rpc (sep); |
| 1109 | #endif |
| 1110 | if (sep->se_family == AF_UNIX) |
| 1111 | (void) unlink (sep->se_service); |
| 1112 | freeconfig (sep); |
| 1113 | free (sep); |
| 1114 | } |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1115 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1119 | static void reapchild (int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1120 | { |
| 1121 | pid_t pid; |
| 1122 | int save_errno = errno, status; |
| 1123 | servtab_t *sep; |
| 1124 | |
| 1125 | for (;;) { |
| 1126 | pid = wait3 (&status, WNOHANG, NULL); |
| 1127 | if (pid <= 0) |
| 1128 | break; |
| 1129 | for (sep = servtab; sep; sep = sep->se_next) |
| 1130 | if (sep->se_wait == pid) { |
| 1131 | if (WIFEXITED (status) && WEXITSTATUS (status)) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1132 | bb_error_msg("%s: exit status 0x%x", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1133 | sep->se_server, WEXITSTATUS (status)); |
| 1134 | else if (WIFSIGNALED (status)) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1135 | bb_error_msg("%s: exit signal 0x%x", |
| 1136 | sep->se_server, WTERMSIG (status)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1137 | sep->se_wait = 1; |
| 1138 | FD_SET (sep->se_fd, &allsock); |
| 1139 | nsock++; |
| 1140 | } |
| 1141 | } |
| 1142 | errno = save_errno; |
| 1143 | } |
| 1144 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1145 | static void retry (int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1146 | { |
| 1147 | servtab_t *sep; |
| 1148 | |
| 1149 | timingout = 0; |
| 1150 | for (sep = servtab; sep; sep = sep->se_next) { |
| 1151 | if (sep->se_fd == -1) { |
| 1152 | switch (sep->se_family) { |
| 1153 | case AF_UNIX: |
| 1154 | case AF_INET: |
| 1155 | #ifdef CONFIG_FEATURE_IPV6 |
| 1156 | case AF_INET6: |
| 1157 | #endif |
| 1158 | setup (sep); |
| 1159 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 1160 | if (sep->se_fd != -1 && isrpcservice (sep)) |
| 1161 | register_rpc (sep); |
| 1162 | #endif |
| 1163 | break; |
| 1164 | } |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1169 | static void goaway (int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1170 | { |
| 1171 | servtab_t *sep; |
| 1172 | |
| 1173 | /* XXX signal race walking sep list */ |
| 1174 | for (sep = servtab; sep; sep = sep->se_next) { |
| 1175 | if (sep->se_fd == -1) |
| 1176 | continue; |
| 1177 | |
| 1178 | switch (sep->se_family) { |
| 1179 | case AF_UNIX: |
| 1180 | (void) unlink (sep->se_service); |
| 1181 | break; |
| 1182 | case AF_INET: |
| 1183 | #ifdef CONFIG_FEATURE_IPV6 |
| 1184 | case AF_INET6: |
| 1185 | #endif |
| 1186 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 1187 | if (sep->se_wait == 1 && isrpcservice (sep)) |
| 1188 | unregister_rpc (sep); /* XXX signal race */ |
| 1189 | #endif |
| 1190 | break; |
| 1191 | } |
| 1192 | (void) close (sep->se_fd); |
| 1193 | } |
| 1194 | (void) unlink (_PATH_INETDPID); |
| 1195 | exit (0); |
| 1196 | } |
| 1197 | |
| 1198 | |
| 1199 | #ifdef INETD_SETPROCTITLE |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1200 | static char **Argv; |
| 1201 | static char *LastArg; |
| 1202 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1203 | static void |
| 1204 | inetd_setproctitle (char *a, int s) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1205 | { |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1206 | socklen_t size; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1207 | char *cp; |
| 1208 | struct sockaddr_in prt_sin; |
| 1209 | char buf[80]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1210 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1211 | cp = Argv[0]; |
| 1212 | size = sizeof (prt_sin); |
| 1213 | (void) snprintf (buf, sizeof buf, "-%s", a); |
| 1214 | if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) { |
| 1215 | char *sa = inet_ntoa (prt_sin.sin_addr); |
| 1216 | |
| 1217 | buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0'; |
| 1218 | strcat (buf, " ["); |
| 1219 | strcat (buf, sa); |
| 1220 | strcat (buf, "]"); |
| 1221 | } |
| 1222 | strncpy (cp, buf, LastArg - cp); |
| 1223 | cp += strlen (cp); |
| 1224 | while (cp < LastArg) |
| 1225 | *cp++ = ' '; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1226 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1227 | #endif |
| 1228 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1229 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1230 | int |
| 1231 | inetd_main (int argc, char *argv[]) |
| 1232 | { |
| 1233 | servtab_t *sep; |
| 1234 | struct passwd *pwd; |
| 1235 | struct group *grp = NULL; |
| 1236 | int tmpint; |
| 1237 | struct sigaction sa, sapipe; |
| 1238 | int opt; |
| 1239 | pid_t pid; |
| 1240 | char buf[50]; |
| 1241 | char *stoomany; |
"Vladimir N. Oleynik" | ecfd1f6 | 2005-11-09 09:19:29 +0000 | [diff] [blame] | 1242 | sigset_t omask, wait_mask; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1243 | |
| 1244 | #ifdef INETD_SETPROCTITLE |
| 1245 | extern char **environ; |
| 1246 | char **envp = environ; |
| 1247 | |
| 1248 | Argv = argv; |
| 1249 | if (envp == 0 || *envp == 0) |
| 1250 | envp = argv; |
| 1251 | while (*envp) |
| 1252 | envp++; |
| 1253 | LastArg = envp[-1] + strlen (envp[-1]); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1254 | #endif |
| 1255 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1256 | openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON); |
| 1257 | |
| 1258 | opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany); |
| 1259 | if(opt & 1) { |
| 1260 | char *e; |
| 1261 | |
| 1262 | toomany = strtoul (stoomany, &e, 0); |
| 1263 | if (!(toomany >= 0 && *e == '\0')) { |
| 1264 | toomany = TOOMANY; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1265 | bb_perror_msg ("-R %s: bad value for service invocation rate", stoomany); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1266 | } |
| 1267 | } |
| 1268 | argc -= optind; |
| 1269 | argv += optind; |
| 1270 | |
| 1271 | uid = getuid (); |
| 1272 | if (uid != 0) |
| 1273 | CONFIG = NULL; |
| 1274 | if (argc > 0) |
| 1275 | CONFIG = argv[0]; |
| 1276 | if (CONFIG == NULL) |
| 1277 | bb_error_msg_and_die ("non-root must specify a config file"); |
| 1278 | |
| 1279 | if (!(opt & 2)) { |
Bernhard Reutner-Fischer | c418d48 | 2006-05-31 10:19:51 +0000 | [diff] [blame] | 1280 | #ifdef BB_NOMMU |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1281 | /* reexec for vfork() do continue parent */ |
| 1282 | vfork_daemon_rexec (0, 0, argc, argv, "-f"); |
| 1283 | #else |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 1284 | xdaemon (0, 0); |
Bernhard Reutner-Fischer | c418d48 | 2006-05-31 10:19:51 +0000 | [diff] [blame] | 1285 | #endif |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1286 | } else { |
| 1287 | setsid (); |
| 1288 | } |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1289 | logmode = LOGMODE_SYSLOG; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1290 | |
| 1291 | if (uid == 0) { |
| 1292 | gid_t gid = getgid (); |
| 1293 | |
| 1294 | /* If run by hand, ensure groups vector gets trashed */ |
| 1295 | setgroups (1, &gid); |
| 1296 | } |
| 1297 | |
| 1298 | { |
| 1299 | FILE *fp; |
| 1300 | |
| 1301 | if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) { |
| 1302 | fprintf (fp, "%u\n", getpid ()); |
| 1303 | (void) fclose (fp); |
Paul Fox | b831753 | 2005-08-01 19:39:47 +0000 | [diff] [blame] | 1304 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1305 | } |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 1306 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1307 | if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1308 | bb_perror_msg ("getrlimit"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1309 | } else { |
| 1310 | rlim_ofile_cur = rlim_ofile.rlim_cur; |
| 1311 | if (rlim_ofile_cur == RLIM_INFINITY) /* ! */ |
| 1312 | rlim_ofile_cur = OPEN_MAX; |
| 1313 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1314 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1315 | memset ((char *) &sa, 0, sizeof (sa)); |
| 1316 | sigemptyset (&sa.sa_mask); |
| 1317 | sigaddset (&sa.sa_mask, SIGALRM); |
| 1318 | sigaddset (&sa.sa_mask, SIGCHLD); |
| 1319 | sigaddset (&sa.sa_mask, SIGHUP); |
| 1320 | sa.sa_handler = retry; |
| 1321 | sigaction (SIGALRM, &sa, NULL); |
| 1322 | /* doconfig(); */ |
| 1323 | config (SIGHUP); |
| 1324 | sa.sa_handler = config; |
| 1325 | sigaction (SIGHUP, &sa, NULL); |
| 1326 | sa.sa_handler = reapchild; |
| 1327 | sigaction (SIGCHLD, &sa, NULL); |
| 1328 | sa.sa_handler = goaway; |
| 1329 | sigaction (SIGTERM, &sa, NULL); |
| 1330 | sa.sa_handler = goaway; |
| 1331 | sigaction (SIGINT, &sa, NULL); |
| 1332 | sa.sa_handler = SIG_IGN; |
| 1333 | sigaction (SIGPIPE, &sa, &sapipe); |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 1334 | memset(&wait_mask, 0, sizeof(wait_mask)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1335 | { |
| 1336 | /* space for daemons to overwrite environment for ps */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1337 | #define DUMMYSIZE 100 |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1338 | char dummy[DUMMYSIZE]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1339 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1340 | (void) memset (dummy, 'x', DUMMYSIZE - 1); |
| 1341 | dummy[DUMMYSIZE - 1] = '\0'; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1342 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1343 | (void) setenv ("inetd_dummy", dummy, 1); |
| 1344 | } |
| 1345 | |
| 1346 | for (;;) { |
| 1347 | int n, ctrl = -1; |
| 1348 | fd_set readable; |
| 1349 | |
| 1350 | if (nsock == 0) { |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1351 | Block_Using_Signals(omask); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1352 | while (nsock == 0) |
"Vladimir N. Oleynik" | ecfd1f6 | 2005-11-09 09:19:29 +0000 | [diff] [blame] | 1353 | sigsuspend (&wait_mask); |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1354 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1355 | } |
| 1356 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1357 | readable = allsock; |
| 1358 | if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) { |
| 1359 | if (n < 0 && errno != EINTR) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1360 | bb_perror_msg("select"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1361 | sleep (1); |
| 1362 | } |
| 1363 | continue; |
| 1364 | } |
| 1365 | for (sep = servtab; n && sep; sep = sep->se_next) |
| 1366 | if (sep->se_fd != -1 && FD_ISSET (sep->se_fd, &readable)) { |
| 1367 | n--; |
| 1368 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) { |
| 1369 | ctrl = accept (sep->se_fd, NULL, NULL); |
| 1370 | if (ctrl < 0) { |
| 1371 | if (errno == EINTR) |
| 1372 | continue; |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1373 | bb_perror_msg("accept (for %s)", sep->se_service); |
Glenn L McGrath | 82d42db | 2004-02-18 13:12:53 +0000 | [diff] [blame] | 1374 | continue; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1375 | } |
| 1376 | if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) { |
| 1377 | struct sockaddr_in peer; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1378 | socklen_t plen = sizeof (peer); |
Glenn L McGrath | 82d42db | 2004-02-18 13:12:53 +0000 | [diff] [blame] | 1379 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1380 | if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1381 | bb_error_msg("could not getpeername"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1382 | close (ctrl); |
| 1383 | continue; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1384 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1385 | if (ntohs (peer.sin_port) == 20) { |
| 1386 | /* XXX ftp bounce */ |
| 1387 | close (ctrl); |
| 1388 | continue; |
| 1389 | } |
| 1390 | } |
| 1391 | } else |
| 1392 | ctrl = sep->se_fd; |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1393 | Block_Using_Signals(omask); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1394 | pid = 0; |
| 1395 | #ifdef INETD_FEATURE_ENABLED |
| 1396 | if (sep->se_bi == 0 || sep->se_bi->bi_fork) |
| 1397 | #endif |
| 1398 | { |
| 1399 | if (sep->se_count++ == 0) |
| 1400 | (void) gettimeofday (&sep->se_time, NULL); |
| 1401 | else if (toomany > 0 && sep->se_count >= sep->se_max) { |
| 1402 | struct timeval now; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1403 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1404 | (void) gettimeofday (&now, NULL); |
| 1405 | if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) { |
| 1406 | sep->se_time = now; |
| 1407 | sep->se_count = 1; |
| 1408 | } else { |
| 1409 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1410 | close (ctrl); |
| 1411 | if (sep->se_family == AF_INET && |
| 1412 | ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) { |
| 1413 | /* |
| 1414 | * Cannot close it -- there are |
| 1415 | * thieves on the system. |
| 1416 | * Simply ignore the connection. |
| 1417 | */ |
| 1418 | --sep->se_count; |
| 1419 | continue; |
| 1420 | } |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1421 | bb_error_msg ("%s/%s server failing (looping), service terminated", |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1422 | sep->se_service, sep->se_proto); |
| 1423 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1424 | close (ctrl); |
| 1425 | FD_CLR (sep->se_fd, &allsock); |
| 1426 | (void) close (sep->se_fd); |
| 1427 | sep->se_fd = -1; |
| 1428 | sep->se_count = 0; |
| 1429 | nsock--; |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1430 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1431 | if (!timingout) { |
| 1432 | timingout = 1; |
| 1433 | alarm (RETRYTIME); |
| 1434 | } |
| 1435 | continue; |
| 1436 | } |
| 1437 | } |
| 1438 | pid = fork (); |
| 1439 | } |
| 1440 | if (pid < 0) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1441 | bb_perror_msg ("fork"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1442 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1443 | close (ctrl); |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1444 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1445 | sleep (1); |
| 1446 | continue; |
| 1447 | } |
| 1448 | if (pid && sep->se_wait) { |
| 1449 | sep->se_wait = pid; |
| 1450 | FD_CLR (sep->se_fd, &allsock); |
| 1451 | nsock--; |
| 1452 | } |
"Vladimir N. Oleynik" | c06e80e | 2005-10-05 14:14:55 +0000 | [diff] [blame] | 1453 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1454 | if (pid == 0) { |
| 1455 | #ifdef INETD_FEATURE_ENABLED |
| 1456 | if (sep->se_bi) { |
| 1457 | (*sep->se_bi->bi_fn) (ctrl, sep); |
| 1458 | } else |
| 1459 | #endif |
| 1460 | { |
| 1461 | if ((pwd = getpwnam (sep->se_user)) == NULL) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1462 | bb_error_msg ("getpwnam: %s: no such user", sep->se_user); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1463 | if (sep->se_socktype != SOCK_STREAM) |
| 1464 | recv (0, buf, sizeof (buf), 0); |
| 1465 | _exit (1); |
| 1466 | } |
| 1467 | if (setsid () < 0) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1468 | bb_perror_msg ("%s: setsid", sep->se_service); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1469 | if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) { |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1470 | bb_error_msg ("getgrnam: %s: no such group", sep->se_group); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1471 | if (sep->se_socktype != SOCK_STREAM) |
| 1472 | recv (0, buf, sizeof (buf), 0); |
| 1473 | _exit (1); |
| 1474 | } |
| 1475 | if (uid != 0) { |
| 1476 | /* a user running private inetd */ |
| 1477 | if (uid != pwd->pw_uid) |
| 1478 | _exit (1); |
| 1479 | } else if (pwd->pw_uid) { |
| 1480 | if (sep->se_group) { |
| 1481 | pwd->pw_gid = grp->gr_gid; |
| 1482 | } |
Rob Landley | afb94ec | 2006-07-16 08:06:34 +0000 | [diff] [blame] | 1483 | xsetgid ((gid_t) pwd->pw_gid); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1484 | initgroups (pwd->pw_name, pwd->pw_gid); |
Rob Landley | afb94ec | 2006-07-16 08:06:34 +0000 | [diff] [blame] | 1485 | xsetuid((uid_t) pwd->pw_uid); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1486 | } else if (sep->se_group) { |
Rob Landley | afb94ec | 2006-07-16 08:06:34 +0000 | [diff] [blame] | 1487 | xsetgid(grp->gr_gid); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1488 | setgroups (1, &grp->gr_gid); |
| 1489 | } |
| 1490 | dup2 (ctrl, 0); |
| 1491 | close (ctrl); |
| 1492 | dup2 (0, 1); |
| 1493 | dup2 (0, 2); |
| 1494 | if (rlim_ofile.rlim_cur != rlim_ofile_cur) |
| 1495 | if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1496 | bb_perror_msg ("setrlimit"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1497 | closelog (); |
| 1498 | for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;) |
| 1499 | (void) close (tmpint); |
| 1500 | sigaction (SIGPIPE, &sapipe, NULL); |
| 1501 | execv (sep->se_server, sep->se_argv); |
| 1502 | if (sep->se_socktype != SOCK_STREAM) |
| 1503 | recv (0, buf, sizeof (buf), 0); |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 1504 | bb_perror_msg ("execv %s", sep->se_server); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1505 | _exit (1); |
| 1506 | } |
| 1507 | } |
| 1508 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1509 | close (ctrl); |
| 1510 | } |
| 1511 | } |
| 1512 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1513 | |
| 1514 | /* |
| 1515 | * Internet services provided internally by inetd: |
| 1516 | */ |
| 1517 | #define BUFSIZE 4096 |
| 1518 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1519 | #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \ |
| 1520 | defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \ |
| 1521 | defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1522 | static int dg_badinput (struct sockaddr_in *dg_sin) |
| 1523 | { |
| 1524 | if (ntohs (dg_sin->sin_port) < IPPORT_RESERVED) |
| 1525 | return (1); |
| 1526 | if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST)) |
| 1527 | return (1); |
| 1528 | /* XXX compare against broadcast addresses in SIOCGIFCONF list? */ |
| 1529 | return (0); |
| 1530 | } |
| 1531 | #endif |
| 1532 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1533 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1534 | /* Echo service -- echo data back */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1535 | /* ARGSUSED */ |
| 1536 | static void |
| 1537 | echo_stream (int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1538 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1539 | char buffer[BUFSIZE]; |
| 1540 | int i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1541 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1542 | inetd_setproctitle (sep->se_service, s); |
| 1543 | while ((i = read (s, buffer, sizeof (buffer))) > 0 && |
| 1544 | write (s, buffer, i) > 0); |
| 1545 | exit (0); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1546 | } |
| 1547 | |
| 1548 | /* Echo service -- echo data back */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1549 | /* ARGSUSED */ |
| 1550 | static void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1551 | echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1552 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1553 | char buffer[BUFSIZE]; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1554 | int i; |
| 1555 | socklen_t size; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1556 | /* struct sockaddr_storage ss; */ |
| 1557 | struct sockaddr sa; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1558 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1559 | size = sizeof (sa); |
| 1560 | if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0) |
| 1561 | return; |
| 1562 | if (dg_badinput ((struct sockaddr_in *) &sa)) |
| 1563 | return; |
| 1564 | (void) sendto (s, buffer, i, 0, &sa, sizeof (sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1565 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1566 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1567 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1568 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1569 | /* Discard service -- ignore data */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1570 | /* ARGSUSED */ |
| 1571 | static void |
| 1572 | discard_stream (int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1573 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1574 | char buffer[BUFSIZE]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1575 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1576 | inetd_setproctitle (sep->se_service, s); |
| 1577 | while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) || |
| 1578 | errno == EINTR); |
| 1579 | exit (0); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1580 | } |
| 1581 | |
| 1582 | /* Discard service -- ignore data */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1583 | /* ARGSUSED */ |
| 1584 | static void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1585 | discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1586 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1587 | char buffer[BUFSIZE]; |
| 1588 | |
| 1589 | (void) read (s, buffer, sizeof (buffer)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1590 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1591 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1592 | |
| 1593 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1594 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1595 | #define LINESIZ 72 |
| 1596 | static char ring[128]; |
| 1597 | static char *endring; |
| 1598 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1599 | static void |
| 1600 | initring (void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1601 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1602 | int i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1603 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1604 | endring = ring; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1605 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1606 | for (i = 0; i <= 128; ++i) |
| 1607 | if (isprint (i)) |
| 1608 | *endring++ = i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1609 | } |
| 1610 | |
| 1611 | /* Character generator */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1612 | /* ARGSUSED */ |
| 1613 | static void |
| 1614 | chargen_stream (int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1615 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1616 | char *rs; |
| 1617 | int len; |
| 1618 | char text[LINESIZ + 2]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1619 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1620 | inetd_setproctitle (sep->se_service, s); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1621 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1622 | if (!endring) { |
| 1623 | initring (); |
| 1624 | rs = ring; |
| 1625 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1626 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1627 | text[LINESIZ] = '\r'; |
| 1628 | text[LINESIZ + 1] = '\n'; |
| 1629 | for (rs = ring;;) { |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1630 | if ((len = endring - rs) >= LINESIZ) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1631 | memmove (text, rs, LINESIZ); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1632 | else { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1633 | memmove (text, rs, len); |
| 1634 | memmove (text + len, ring, LINESIZ - len); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1635 | } |
| 1636 | if (++rs == endring) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1637 | rs = ring; |
| 1638 | if (write (s, text, sizeof (text)) != sizeof (text)) |
| 1639 | break; |
| 1640 | } |
| 1641 | exit (0); |
| 1642 | } |
| 1643 | |
| 1644 | /* Character generator */ |
| 1645 | /* ARGSUSED */ |
| 1646 | static void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1647 | chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1648 | { |
| 1649 | /* struct sockaddr_storage ss; */ |
| 1650 | struct sockaddr sa; |
| 1651 | static char *rs; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1652 | int len; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1653 | char text[LINESIZ + 2]; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1654 | socklen_t size; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1655 | |
| 1656 | if (endring == 0) { |
| 1657 | initring (); |
| 1658 | rs = ring; |
| 1659 | } |
| 1660 | |
| 1661 | size = sizeof (sa); |
| 1662 | if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0) |
| 1663 | return; |
| 1664 | if (dg_badinput ((struct sockaddr_in *) &sa)) |
| 1665 | return; |
| 1666 | |
| 1667 | if ((len = endring - rs) >= LINESIZ) |
| 1668 | memmove (text, rs, LINESIZ); |
| 1669 | else { |
| 1670 | memmove (text, rs, len); |
| 1671 | memmove (text + len, ring, LINESIZ - len); |
| 1672 | } |
| 1673 | if (++rs == endring) |
| 1674 | rs = ring; |
| 1675 | text[LINESIZ] = '\r'; |
| 1676 | text[LINESIZ + 1] = '\n'; |
| 1677 | (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1678 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1679 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1680 | |
| 1681 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1682 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1683 | /* |
| 1684 | * Return a machine readable date and time, in the form of the |
| 1685 | * number of seconds since midnight, Jan 1, 1900. Since gettimeofday |
| 1686 | * returns the number of seconds since midnight, Jan 1, 1970, |
| 1687 | * we must add 2208988800 seconds to this figure to make up for |
| 1688 | * some seventy years Bell Labs was asleep. |
| 1689 | */ |
| 1690 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1691 | static u_int machtime (void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1692 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1693 | struct timeval tv; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1694 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1695 | if (gettimeofday (&tv, NULL) < 0) { |
| 1696 | fprintf (stderr, "Unable to get time of day\n"); |
| 1697 | return (0L); |
| 1698 | } |
| 1699 | return (htonl ((u_int) tv.tv_sec + 2208988800UL)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1700 | } |
| 1701 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1702 | /* ARGSUSED */ |
| 1703 | static void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1704 | machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1705 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1706 | u_int result; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1707 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1708 | result = machtime (); |
| 1709 | (void) write (s, (char *) &result, sizeof (result)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1710 | } |
| 1711 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1712 | /* ARGSUSED */ |
| 1713 | static void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1714 | machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1715 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1716 | u_int result; |
| 1717 | /* struct sockaddr_storage ss; */ |
| 1718 | struct sockaddr sa; |
| 1719 | struct sockaddr_in *dg_sin; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1720 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1721 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1722 | size = sizeof (sa); |
| 1723 | if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0) |
| 1724 | return; |
| 1725 | /* if (dg_badinput((struct sockaddr *)&ss)) */ |
| 1726 | dg_sin = (struct sockaddr_in *) &sa; |
| 1727 | if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) || |
| 1728 | ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2) |
| 1729 | return; |
| 1730 | result = machtime (); |
| 1731 | (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1732 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1733 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1734 | |
| 1735 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1736 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1737 | /* Return human-readable time of day */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1738 | /* ARGSUSED */ |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1739 | static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1740 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1741 | char buffer[256]; |
| 1742 | time_t t; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1743 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1744 | t = time (NULL); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1745 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1746 | (void) sprintf (buffer, "%.24s\r\n", ctime (&t)); |
| 1747 | (void) write (s, buffer, strlen (buffer)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1748 | } |
| 1749 | |
| 1750 | /* Return human-readable time of day */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1751 | /* ARGSUSED */ |
| 1752 | void |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 1753 | daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1754 | { |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1755 | char buffer[256]; |
| 1756 | time_t t; |
| 1757 | /* struct sockaddr_storage ss; */ |
| 1758 | struct sockaddr sa; |
"Vladimir N. Oleynik" | f382c02 | 2005-10-05 14:01:13 +0000 | [diff] [blame] | 1759 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1760 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1761 | t = time ((time_t *) 0); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1762 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1763 | size = sizeof (sa); |
| 1764 | if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0) |
| 1765 | return; |
| 1766 | if (dg_badinput ((struct sockaddr_in *) &sa)) |
| 1767 | return; |
| 1768 | (void) sprintf (buffer, "%.24s\r\n", ctime (&t)); |
| 1769 | (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1770 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1771 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */ |