"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 || \ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 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 || \ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 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 | |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 186 | typedef struct servtab { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 187 | char *se_hostaddr; /* host address to listen on */ |
| 188 | char *se_service; /* name of service */ |
| 189 | int se_socktype; /* type of socket to use */ |
| 190 | int se_family; /* address family */ |
| 191 | char *se_proto; /* protocol used */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 192 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 193 | int se_rpcprog; /* rpc program number */ |
| 194 | int se_rpcversl; /* rpc program lowest version */ |
| 195 | int se_rpcversh; /* rpc program highest version */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 196 | #define isrpcservice(sep) ((sep)->se_rpcversl != 0) |
| 197 | #else |
| 198 | #define isrpcservice(sep) 0 |
| 199 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 200 | pid_t se_wait; /* single threaded server */ |
| 201 | short se_checked; /* looked at during merge */ |
| 202 | char *se_user; /* user name to run as */ |
| 203 | char *se_group; /* group name to run as */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 204 | #ifdef INETD_FEATURE_ENABLED |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 205 | const struct builtin *se_bi; /* if built-in, description */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 206 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 207 | char *se_server; /* server program */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 208 | #define MAXARGV 20 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 209 | char *se_argv[MAXARGV + 1]; /* program arguments */ |
| 210 | int se_fd; /* open descriptor */ |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 211 | union { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 212 | struct sockaddr se_un_ctrladdr; |
| 213 | struct sockaddr_in se_un_ctrladdr_in; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 214 | #ifdef CONFIG_FEATURE_IPV6 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 215 | struct sockaddr_in6 se_un_ctrladdr_in6; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 216 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 217 | struct sockaddr_un se_un_ctrladdr_un; |
| 218 | } se_un; /* bound address */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 219 | #define se_ctrladdr se_un.se_un_ctrladdr |
| 220 | #define se_ctrladdr_in se_un.se_un_ctrladdr_in |
| 221 | #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6 |
| 222 | #define se_ctrladdr_un se_un.se_un_ctrladdr_un |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 223 | int se_ctrladdr_size; |
| 224 | int se_max; /* max # of instances of this service */ |
| 225 | int se_count; /* number started since se_time */ |
| 226 | struct timeval se_time; /* start of se_count */ |
| 227 | struct servtab *se_next; |
Glenn L McGrath | 03a0643 | 2004-02-18 13:19:58 +0000 | [diff] [blame] | 228 | } servtab_t; |
| 229 | |
| 230 | static servtab_t *servtab; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 231 | |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 232 | #ifdef INETD_FEATURE_ENABLED |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 233 | struct builtin { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 234 | const char *bi_service; /* internally provided service name */ |
| 235 | int bi_socktype; /* type of socket supported */ |
| 236 | short bi_fork; /* 1 if should fork before call */ |
| 237 | short bi_wait; /* 1 if should wait for child */ |
| 238 | void (*bi_fn) (int, servtab_t *); |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 239 | }; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 240 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 241 | /* Echo received data */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 242 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 243 | static void echo_stream(int, servtab_t *); |
| 244 | static void echo_dg(int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 245 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 246 | /* Internet /dev/null */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 247 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 248 | static void discard_stream(int, servtab_t *); |
| 249 | static void discard_dg(int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 250 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 251 | /* Return 32 bit time since 1900 */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 252 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 253 | static void machtime_stream(int, servtab_t *); |
| 254 | static void machtime_dg(int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 255 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 256 | /* Return human-readable time */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 257 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 258 | static void daytime_stream(int, servtab_t *); |
| 259 | static void daytime_dg(int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 260 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 261 | /* Familiar character generator */ |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 262 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 263 | static void chargen_stream(int, servtab_t *); |
| 264 | static void chargen_dg(int, servtab_t *); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 265 | #endif |
| 266 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 267 | static const struct builtin builtins[] = { |
| 268 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 269 | /* Echo received data */ |
| 270 | {"echo", SOCK_STREAM, 1, 0, echo_stream,}, |
| 271 | {"echo", SOCK_DGRAM, 0, 0, echo_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 272 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 273 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 274 | /* Internet /dev/null */ |
| 275 | {"discard", SOCK_STREAM, 1, 0, discard_stream,}, |
| 276 | {"discard", SOCK_DGRAM, 0, 0, discard_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 277 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 278 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 279 | /* Return 32 bit time since 1900 */ |
| 280 | {"time", SOCK_STREAM, 0, 0, machtime_stream,}, |
| 281 | {"time", SOCK_DGRAM, 0, 0, machtime_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 282 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 283 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 284 | /* Return human-readable time */ |
| 285 | {"daytime", SOCK_STREAM, 0, 0, daytime_stream,}, |
| 286 | {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 287 | #endif |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 288 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 289 | /* Familiar character generator */ |
| 290 | {"chargen", SOCK_STREAM, 1, 0, chargen_stream,}, |
| 291 | {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,}, |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 292 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 293 | {NULL, 0, 0, 0, NULL} |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 294 | }; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 295 | #endif /* INETD_FEATURE_ENABLED */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 296 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 297 | static int global_queuelen = 128; |
| 298 | static int nsock, maxsock; |
| 299 | static fd_set allsock; |
| 300 | static int toomany = TOOMANY; |
| 301 | static int timingout; |
| 302 | static struct servent *sp; |
| 303 | static uid_t uid; |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 304 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 305 | static char *CONFIG = _PATH_INETDCONF; |
Glenn L McGrath | ff6ec8a | 2004-01-17 02:47:45 +0000 | [diff] [blame] | 306 | |
| 307 | static FILE *fconfig; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 308 | static char line[1024]; |
| 309 | static char *defhost; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 310 | |
Denis Vlasenko | 3538b9a | 2006-09-06 18:36:50 +0000 | [diff] [blame] | 311 | /* xstrdup(NULL) returns NULL, but this one |
| 312 | * will return newly-allocated "" if called with NULL arg |
| 313 | * TODO: audit whether this makes any real difference |
| 314 | */ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 315 | static char *xxstrdup(char *cp) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 316 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 317 | return xstrdup(cp ? cp : ""); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 318 | } |
| 319 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 320 | static int setconfig(void) |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 321 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 322 | free(defhost); |
| 323 | defhost = xstrdup("*"); |
| 324 | if (fconfig != NULL) { |
| 325 | fseek(fconfig, 0L, SEEK_SET); |
| 326 | return 1; |
| 327 | } |
| 328 | fconfig = fopen(CONFIG, "r"); |
| 329 | return (fconfig != NULL); |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 330 | } |
| 331 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 332 | static void endconfig(void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 333 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 334 | if (fconfig) { |
| 335 | (void) fclose(fconfig); |
| 336 | fconfig = NULL; |
| 337 | } |
| 338 | free(defhost); |
| 339 | defhost = 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 340 | } |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 341 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 342 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 343 | static void register_rpc(servtab_t *sep) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 344 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 345 | int n; |
| 346 | struct sockaddr_in ir_sin; |
| 347 | struct protoent *pp; |
| 348 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 349 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 350 | if ((pp = getprotobyname(sep->se_proto + 4)) == NULL) { |
| 351 | bb_perror_msg("%s: getproto", sep->se_proto); |
| 352 | return; |
| 353 | } |
| 354 | size = sizeof ir_sin; |
| 355 | if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) { |
| 356 | bb_perror_msg("%s/%s: getsockname", |
| 357 | sep->se_service, sep->se_proto); |
| 358 | return; |
| 359 | } |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 360 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 361 | for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) { |
| 362 | (void) pmap_unset(sep->se_rpcprog, n); |
| 363 | if (!pmap_set(sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port))) |
| 364 | bb_perror_msg("%s %s: pmap_set: %u %u %u %u", |
| 365 | sep->se_service, sep->se_proto, |
| 366 | sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port)); |
| 367 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 368 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 369 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 370 | static void unregister_rpc(servtab_t *sep) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 371 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 372 | int n; |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 373 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 374 | for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) { |
| 375 | if (!pmap_unset(sep->se_rpcprog, n)) |
| 376 | bb_error_msg("pmap_unset(%u, %u)", sep->se_rpcprog, n); |
| 377 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 378 | } |
| 379 | #endif /* CONFIG_FEATURE_INETD_RPC */ |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 380 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 381 | static void freeconfig(servtab_t *cp) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 382 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 383 | int i; |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 384 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 385 | free(cp->se_hostaddr); |
| 386 | free(cp->se_service); |
| 387 | free(cp->se_proto); |
| 388 | free(cp->se_user); |
| 389 | free(cp->se_group); |
| 390 | free(cp->se_server); |
| 391 | for (i = 0; i < MAXARGV; i++) |
| 392 | free(cp->se_argv[i]); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 393 | } |
Glenn L McGrath | df7d84c | 2004-02-22 11:25:13 +0000 | [diff] [blame] | 394 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 395 | static int bump_nofile (void) |
| 396 | { |
| 397 | #define FD_CHUNK 32 |
Glenn L McGrath | eaf5bc0 | 2004-01-20 15:32:39 +0000 | [diff] [blame] | 398 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 399 | struct rlimit rl; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 400 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 401 | if (getrlimit (RLIMIT_NOFILE, &rl) < 0) { |
| 402 | bb_perror_msg("getrlimit"); |
| 403 | return -1; |
| 404 | } |
| 405 | rl.rlim_cur = MIN(rl.rlim_max, rl.rlim_cur + FD_CHUNK); |
| 406 | rl.rlim_cur = MIN(FD_SETSIZE, rl.rlim_cur + FD_CHUNK); |
| 407 | if (rl.rlim_cur <= rlim_ofile_cur) { |
| 408 | bb_error_msg("bump_nofile: cannot extend file limit, max = %d", |
| 409 | (int) rl.rlim_cur); |
| 410 | return -1; |
| 411 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 412 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 413 | if (setrlimit(RLIMIT_NOFILE, &rl) < 0) { |
| 414 | bb_perror_msg("setrlimit"); |
| 415 | return -1; |
| 416 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 417 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 418 | rlim_ofile_cur = rl.rlim_cur; |
| 419 | return 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 420 | } |
| 421 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 422 | static void setup(servtab_t *sep) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 423 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 424 | int on = 1; |
| 425 | int r; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 426 | |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 427 | sep->se_fd = socket(sep->se_family, sep->se_socktype, 0); |
| 428 | if (sep->se_fd < 0) { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 429 | bb_perror_msg("%s/%s: socket", sep->se_service, sep->se_proto); |
| 430 | return; |
| 431 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 432 | #define turnon(fd, opt) \ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 433 | setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof(on)) |
| 434 | if (turnon(sep->se_fd, SO_REUSEADDR) < 0) |
| 435 | bb_perror_msg("setsockopt(SO_REUSEADDR)"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 436 | #undef turnon |
| 437 | |
| 438 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 439 | if (isrpcservice(sep)) { |
| 440 | struct passwd *pwd; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 441 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 442 | /* |
| 443 | * for RPC services, attempt to use a reserved port |
| 444 | * if they are going to be running as root. |
| 445 | * |
| 446 | * Also, zero out the port for all RPC services; let bind() |
| 447 | * find one. |
| 448 | */ |
| 449 | sep->se_ctrladdr_in.sin_port = 0; |
| 450 | if (sep->se_user && (pwd = getpwnam(sep->se_user)) && |
| 451 | pwd->pw_uid == 0 && uid == 0) |
| 452 | r = bindresvport(sep->se_fd, &sep->se_ctrladdr_in); |
| 453 | else { |
| 454 | r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size); |
| 455 | if (r == 0) { |
| 456 | socklen_t len = sep->se_ctrladdr_size; |
| 457 | int saveerrno = errno; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 458 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 459 | /* update se_ctrladdr_in.sin_port */ |
| 460 | r = getsockname(sep->se_fd, &sep->se_ctrladdr, &len); |
| 461 | if (r <= 0) |
| 462 | errno = saveerrno; |
| 463 | } |
| 464 | } |
| 465 | } else |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 466 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 467 | r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size); |
| 468 | if (r < 0) { |
| 469 | bb_perror_msg("%s/%s (%d): bind", |
| 470 | sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family); |
| 471 | close(sep->se_fd); |
| 472 | sep->se_fd = -1; |
| 473 | if (!timingout) { |
| 474 | timingout = 1; |
| 475 | alarm(RETRYTIME); |
| 476 | } |
| 477 | return; |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 478 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 479 | if (sep->se_socktype == SOCK_STREAM) |
| 480 | listen(sep->se_fd, global_queuelen); |
Glenn L McGrath | 53766c4 | 2004-01-18 08:58:06 +0000 | [diff] [blame] | 481 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 482 | FD_SET(sep->se_fd, &allsock); |
| 483 | nsock++; |
| 484 | if (sep->se_fd > maxsock) { |
| 485 | maxsock = sep->se_fd; |
| 486 | if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN) |
| 487 | bump_nofile(); |
| 488 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 489 | } |
| 490 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 491 | static char *nextline(void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 492 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 493 | char *cp; |
| 494 | FILE *fd = fconfig; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 495 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 496 | if (fgets(line, sizeof(line), fd) == NULL) |
| 497 | return NULL; |
| 498 | cp = strchr(line, '\n'); |
| 499 | if (cp) |
| 500 | *cp = '\0'; |
| 501 | return line; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 502 | } |
| 503 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 504 | static char *skip(char **cpp) /* int report; */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 505 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 506 | char *cp = *cpp; |
| 507 | char *start; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 508 | |
| 509 | /* erp: */ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 510 | if (*cpp == NULL) { |
| 511 | /* if (report) */ |
| 512 | /* bb_error_msg("syntax error in inetd config file"); */ |
| 513 | return NULL; |
| 514 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 515 | |
| 516 | again: |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 517 | while (*cp == ' ' || *cp == '\t') |
| 518 | cp++; |
| 519 | if (*cp == '\0') { |
| 520 | int c; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 521 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 522 | c = getc(fconfig); |
| 523 | (void) ungetc(c, fconfig); |
| 524 | if (c == ' ' || c == '\t') |
| 525 | if ((cp = nextline())) |
| 526 | goto again; |
| 527 | *cpp = NULL; |
| 528 | /* goto erp; */ |
| 529 | return NULL; |
| 530 | } |
| 531 | start = cp; |
| 532 | while (*cp && *cp != ' ' && *cp != '\t') |
| 533 | cp++; |
| 534 | if (*cp != '\0') |
| 535 | *cp++ = '\0'; |
| 536 | /* if ((*cpp = cp) == NULL) */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 537 | /* goto erp; */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 538 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 539 | *cpp = cp; |
| 540 | return start; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static servtab_t *new_servtab(void) |
| 544 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 545 | return xmalloc(sizeof(servtab_t)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 546 | } |
| 547 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 548 | static servtab_t *dupconfig(servtab_t *sep) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 549 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 550 | servtab_t *newtab; |
| 551 | int argc; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 552 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 553 | newtab = new_servtab(); |
| 554 | memset(newtab, 0, sizeof(servtab_t)); |
| 555 | newtab->se_service = xstrdup(sep->se_service); |
| 556 | newtab->se_socktype = sep->se_socktype; |
| 557 | newtab->se_family = sep->se_family; |
| 558 | newtab->se_proto = xstrdup(sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 559 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 560 | newtab->se_rpcprog = sep->se_rpcprog; |
| 561 | newtab->se_rpcversl = sep->se_rpcversl; |
| 562 | newtab->se_rpcversh = sep->se_rpcversh; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 563 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 564 | newtab->se_wait = sep->se_wait; |
| 565 | newtab->se_user = xstrdup(sep->se_user); |
| 566 | newtab->se_group = xstrdup(sep->se_group); |
Glenn L McGrath | c3b134f | 2004-01-17 01:26:53 +0000 | [diff] [blame] | 567 | #ifdef INETD_FEATURE_ENABLED |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 568 | newtab->se_bi = sep->se_bi; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 569 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 570 | newtab->se_server = xstrdup(sep->se_server); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 571 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 572 | for (argc = 0; argc <= MAXARGV; argc++) |
| 573 | newtab->se_argv[argc] = xstrdup(sep->se_argv[argc]); |
| 574 | newtab->se_max = sep->se_max; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 575 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 576 | return newtab; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 577 | } |
| 578 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 579 | static servtab_t *getconfigent(void) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 580 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 581 | servtab_t *sep; |
| 582 | int argc; |
| 583 | char *cp, *arg; |
| 584 | char *hostdelim; |
| 585 | servtab_t *nsep; |
| 586 | servtab_t *psep; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 587 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 588 | sep = new_servtab(); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 589 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 590 | /* memset(sep, 0, sizeof *sep); */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 591 | more: |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 592 | /* freeconfig(sep); */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 593 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 594 | while ((cp = nextline()) && *cp == '#'); |
| 595 | if (cp == NULL) { |
| 596 | /* free(sep); */ |
| 597 | return NULL; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 598 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 599 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 600 | memset((char *) sep, 0, sizeof *sep); |
| 601 | arg = skip(&cp); |
| 602 | if (arg == NULL) { |
| 603 | /* A blank line. */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 604 | goto more; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 605 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 606 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 607 | /* Check for a host name. */ |
| 608 | hostdelim = strrchr(arg, ':'); |
| 609 | if (hostdelim) { |
| 610 | *hostdelim = '\0'; |
| 611 | sep->se_hostaddr = xstrdup(arg); |
| 612 | arg = hostdelim + 1; |
| 613 | /* |
| 614 | * If the line is of the form `host:', then just change the |
| 615 | * default host for the following lines. |
| 616 | */ |
| 617 | if (*arg == '\0') { |
| 618 | arg = skip(&cp); |
| 619 | if (cp == NULL) { |
| 620 | free(defhost); |
| 621 | defhost = sep->se_hostaddr; |
| 622 | goto more; |
| 623 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 624 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 625 | } else |
| 626 | sep->se_hostaddr = xxstrdup(defhost); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 627 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 628 | sep->se_service = xxstrdup(arg); |
| 629 | arg = skip(&cp); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 630 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 631 | if (strcmp(arg, "stream") == 0) |
| 632 | sep->se_socktype = SOCK_STREAM; |
| 633 | else if (strcmp(arg, "dgram") == 0) |
| 634 | sep->se_socktype = SOCK_DGRAM; |
| 635 | else if (strcmp(arg, "rdm") == 0) |
| 636 | sep->se_socktype = SOCK_RDM; |
| 637 | else if (strcmp(arg, "seqpacket") == 0) |
| 638 | sep->se_socktype = SOCK_SEQPACKET; |
| 639 | else if (strcmp(arg, "raw") == 0) |
| 640 | sep->se_socktype = SOCK_RAW; |
| 641 | else |
| 642 | sep->se_socktype = -1; |
| 643 | |
| 644 | sep->se_proto = xxstrdup(skip(&cp)); |
| 645 | |
| 646 | if (strcmp(sep->se_proto, "unix") == 0) { |
| 647 | sep->se_family = AF_UNIX; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 648 | } else { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 649 | sep->se_family = AF_INET; |
| 650 | if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') |
| 651 | #ifdef CONFIG_FEATURE_IPV6 |
| 652 | sep->se_family = AF_INET6; |
| 653 | #else |
| 654 | bb_error_msg("%s: IPV6 not supported", sep->se_proto); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 655 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 656 | if (strncmp(sep->se_proto, "rpc/", 4) == 0) { |
| 657 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 658 | char *p, *ccp; |
| 659 | long l; |
| 660 | |
| 661 | p = strchr(sep->se_service, '/'); |
| 662 | if (p == 0) { |
| 663 | bb_error_msg("%s: no rpc version", sep->se_service); |
| 664 | goto more; |
| 665 | } |
| 666 | *p++ = '\0'; |
| 667 | l = strtol(p, &ccp, 0); |
| 668 | if (ccp == p || l < 0 || l > INT_MAX) { |
| 669 | badafterall: |
| 670 | bb_error_msg("%s/%s: bad rpc version", sep->se_service, p); |
| 671 | goto more; |
| 672 | } |
| 673 | sep->se_rpcversl = sep->se_rpcversh = l; |
| 674 | if (*ccp == '-') { |
| 675 | p = ccp + 1; |
| 676 | l = strtol(p, &ccp, 0); |
| 677 | if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp) |
| 678 | goto badafterall; |
| 679 | sep->se_rpcversh = l; |
| 680 | } else if (*ccp != '\0') |
| 681 | goto badafterall; |
| 682 | #else |
| 683 | bb_error_msg("%s: rpc services not supported", sep->se_service); |
| 684 | #endif |
| 685 | } |
| 686 | } |
| 687 | arg = skip(&cp); |
| 688 | if (arg == NULL) |
| 689 | goto more; |
| 690 | |
| 691 | { |
| 692 | char *s = strchr(arg, '.'); |
| 693 | if (s) { |
| 694 | *s++ = '\0'; |
| 695 | sep->se_max = atoi(s); |
| 696 | } else |
| 697 | sep->se_max = toomany; |
| 698 | } |
| 699 | sep->se_wait = strcmp(arg, "wait") == 0; |
| 700 | /* if ((arg = skip(&cp, 1)) == NULL) */ |
| 701 | /* goto more; */ |
| 702 | sep->se_user = xxstrdup(skip(&cp)); |
| 703 | arg = strchr(sep->se_user, '.'); |
| 704 | if (arg == NULL) |
| 705 | arg = strchr(sep->se_user, ':'); |
| 706 | if (arg) { |
| 707 | *arg++ = '\0'; |
| 708 | sep->se_group = xstrdup(arg); |
| 709 | } |
| 710 | /* if ((arg = skip(&cp, 1)) == NULL) */ |
| 711 | /* goto more; */ |
| 712 | |
| 713 | sep->se_server = xxstrdup(skip(&cp)); |
| 714 | if (strcmp(sep->se_server, "internal") == 0) { |
| 715 | #ifdef INETD_FEATURE_ENABLED |
| 716 | const struct builtin *bi; |
| 717 | |
| 718 | for (bi = builtins; bi->bi_service; bi++) |
| 719 | if (bi->bi_socktype == sep->se_socktype && |
| 720 | strcmp(bi->bi_service, sep->se_service) == 0) |
| 721 | break; |
| 722 | if (bi->bi_service == 0) { |
| 723 | bb_error_msg("internal service %s unknown", sep->se_service); |
| 724 | goto more; |
| 725 | } |
| 726 | sep->se_bi = bi; |
| 727 | sep->se_wait = bi->bi_wait; |
| 728 | #else |
| 729 | bb_perror_msg("internal service %s unknown", sep->se_service); |
| 730 | goto more; |
| 731 | #endif |
| 732 | } |
| 733 | #ifdef INETD_FEATURE_ENABLED |
| 734 | else |
| 735 | sep->se_bi = NULL; |
| 736 | #endif |
| 737 | argc = 0; |
| 738 | for (arg = skip(&cp); cp; arg = skip(&cp)) { |
| 739 | if (argc < MAXARGV) |
| 740 | sep->se_argv[argc++] = xxstrdup(arg); |
| 741 | } |
| 742 | while (argc <= MAXARGV) |
| 743 | sep->se_argv[argc++] = NULL; |
| 744 | |
| 745 | /* |
| 746 | * Now that we've processed the entire line, check if the hostname |
| 747 | * specifier was a comma separated list of hostnames. If so |
| 748 | * we'll make new entries for each address. |
| 749 | */ |
| 750 | while ((hostdelim = strrchr(sep->se_hostaddr, ',')) != NULL) { |
| 751 | nsep = dupconfig(sep); |
| 752 | |
| 753 | /* |
| 754 | * NULL terminate the hostname field of the existing entry, |
| 755 | * and make a dup for the new entry. |
| 756 | */ |
| 757 | *hostdelim++ = '\0'; |
| 758 | nsep->se_hostaddr = xstrdup(hostdelim); |
| 759 | |
| 760 | nsep->se_next = sep->se_next; |
| 761 | sep->se_next = nsep; |
| 762 | } |
| 763 | |
| 764 | nsep = sep; |
| 765 | while (nsep != NULL) { |
| 766 | nsep->se_checked = 1; |
| 767 | if (nsep->se_family == AF_INET) { |
| 768 | if (!strcmp(nsep->se_hostaddr, "*")) |
| 769 | nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY; |
| 770 | else if (!inet_aton(nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) { |
| 771 | struct hostent *hp; |
| 772 | |
| 773 | hp = gethostbyname(nsep->se_hostaddr); |
| 774 | if (hp == 0) { |
| 775 | bb_error_msg("%s: unknown host", nsep->se_hostaddr); |
| 776 | nsep->se_checked = 0; |
| 777 | goto skip; |
| 778 | } else if (hp->h_addrtype != AF_INET) { |
| 779 | bb_error_msg("%s: address isn't an Internet " |
| 780 | "address", nsep->se_hostaddr); |
| 781 | nsep->se_checked = 0; |
| 782 | goto skip; |
| 783 | } else { |
| 784 | int i = 1; |
| 785 | |
| 786 | memmove(&nsep->se_ctrladdr_in.sin_addr, |
| 787 | hp->h_addr_list[0], sizeof(struct in_addr)); |
| 788 | while (hp->h_addr_list[i] != NULL) { |
| 789 | psep = dupconfig(nsep); |
| 790 | psep->se_hostaddr = xxstrdup(nsep->se_hostaddr); |
| 791 | psep->se_checked = 1; |
| 792 | memmove(&psep->se_ctrladdr_in.sin_addr, |
| 793 | hp->h_addr_list[i], sizeof(struct in_addr)); |
| 794 | psep->se_ctrladdr_size = sizeof(psep->se_ctrladdr_in); |
| 795 | i++; |
| 796 | /* Prepend to list, don't want to look up */ |
| 797 | /* its hostname again. */ |
| 798 | psep->se_next = sep; |
| 799 | sep = psep; |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | } |
| 804 | /* XXX BUG?: is this skip: label supposed to remain? */ |
| 805 | skip: |
| 806 | nsep = nsep->se_next; |
| 807 | } |
| 808 | |
| 809 | /* |
| 810 | * Finally, free any entries which failed the gethostbyname |
| 811 | * check. |
| 812 | */ |
| 813 | psep = NULL; |
| 814 | nsep = sep; |
| 815 | while (nsep != NULL) { |
| 816 | servtab_t *tsep; |
| 817 | |
| 818 | if (nsep->se_checked == 0) { |
| 819 | tsep = nsep; |
| 820 | if (psep == NULL) { |
| 821 | sep = nsep->se_next; |
| 822 | nsep = sep; |
| 823 | } else { |
| 824 | nsep = nsep->se_next; |
| 825 | psep->se_next = nsep; |
| 826 | } |
| 827 | freeconfig(tsep); |
| 828 | } else { |
| 829 | nsep->se_checked = 0; |
| 830 | psep = nsep; |
| 831 | nsep = nsep->se_next; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | return sep; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 836 | } |
| 837 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 838 | #define Block_Using_Signals(m) do { \ |
| 839 | sigemptyset(&m); \ |
| 840 | sigaddset(&m, SIGCHLD); \ |
| 841 | sigaddset(&m, SIGHUP); \ |
| 842 | sigaddset(&m, SIGALRM); \ |
| 843 | sigprocmask(SIG_BLOCK, &m, NULL); \ |
| 844 | } while(0) |
| 845 | |
| 846 | static servtab_t *enter(servtab_t *cp) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 847 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 848 | servtab_t *sep; |
| 849 | sigset_t omask; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 850 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 851 | sep = new_servtab(); |
| 852 | *sep = *cp; |
| 853 | sep->se_fd = -1; |
| 854 | #ifdef CONFIG_FEATURE_INETD_RPC |
| 855 | sep->se_rpcprog = -1; |
| 856 | #endif |
| 857 | Block_Using_Signals(omask); |
| 858 | sep->se_next = servtab; |
| 859 | servtab = sep; |
| 860 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 861 | return sep; |
| 862 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 863 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 864 | static int matchconf(servtab_t *old, servtab_t *new) |
| 865 | { |
| 866 | if (strcmp(old->se_service, new->se_service) != 0) |
| 867 | return 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 868 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 869 | if (strcmp(old->se_hostaddr, new->se_hostaddr) != 0) |
| 870 | return 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 871 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 872 | if (strcmp(old->se_proto, new->se_proto) != 0) |
| 873 | return 0; |
| 874 | |
| 875 | /* |
| 876 | * If the new servtab is bound to a specific address, check that the |
| 877 | * old servtab is bound to the same entry. If the new service is not |
| 878 | * bound to a specific address then the check of se_hostaddr above |
| 879 | * is sufficient. |
| 880 | */ |
| 881 | |
| 882 | if (old->se_family == AF_INET && new->se_family == AF_INET && |
| 883 | memcmp(&old->se_ctrladdr_in.sin_addr, |
| 884 | &new->se_ctrladdr_in.sin_addr, |
| 885 | sizeof(new->se_ctrladdr_in.sin_addr)) != 0) |
| 886 | return 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 887 | |
| 888 | #ifdef CONFIG_FEATURE_IPV6 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 889 | if (old->se_family == AF_INET6 && new->se_family == AF_INET6 && |
| 890 | memcmp(&old->se_ctrladdr_in6.sin6_addr, |
| 891 | &new->se_ctrladdr_in6.sin6_addr, |
| 892 | sizeof(new->se_ctrladdr_in6.sin6_addr)) != 0) |
| 893 | return 0; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 894 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 895 | return 1; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 896 | } |
| 897 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 898 | static void config(int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 899 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 900 | servtab_t *sep, *cp, **sepp; |
| 901 | sigset_t omask; |
| 902 | size_t n; |
| 903 | char protoname[10]; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 904 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 905 | if (!setconfig()) { |
| 906 | bb_perror_msg("%s", CONFIG); |
| 907 | return; |
| 908 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 909 | for (sep = servtab; sep; sep = sep->se_next) |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 910 | sep->se_checked = 0; |
| 911 | cp = getconfigent(); |
| 912 | while (cp != NULL) { |
| 913 | for (sep = servtab; sep; sep = sep->se_next) |
| 914 | if (matchconf(sep, cp)) |
| 915 | break; |
Bernhard Reutner-Fischer | d591a36 | 2006-08-20 17:35:13 +0000 | [diff] [blame] | 916 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 917 | if (sep != 0) { |
| 918 | int i; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 919 | |
Mike Frysinger | 23fedb3 | 2005-10-05 00:50:03 +0000 | [diff] [blame] | 920 | #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] | 921 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 922 | Block_Using_Signals(omask); |
| 923 | /* |
| 924 | * sep->se_wait may be holding the pid of a daemon |
| 925 | * that we're waiting for. If so, don't overwrite |
| 926 | * it unless the config file explicitly says don't |
| 927 | * wait. |
| 928 | */ |
| 929 | if ( |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 930 | #ifdef INETD_FEATURE_ENABLED |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 931 | cp->se_bi == 0 && |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 932 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 933 | (sep->se_wait == 1 || cp->se_wait == 0)) |
| 934 | sep->se_wait = cp->se_wait; |
| 935 | SWAP(int, cp->se_max, sep->se_max); |
| 936 | SWAP(char *, sep->se_user, cp->se_user); |
| 937 | SWAP(char *, sep->se_group, cp->se_group); |
| 938 | SWAP(char *, sep->se_server, cp->se_server); |
| 939 | for (i = 0; i < MAXARGV; i++) |
| 940 | SWAP(char *, sep->se_argv[i], cp->se_argv[i]); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 941 | #undef SWAP |
| 942 | |
| 943 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 944 | if (isrpcservice(sep)) |
| 945 | unregister_rpc(sep); |
| 946 | sep->se_rpcversl = cp->se_rpcversl; |
| 947 | sep->se_rpcversh = cp->se_rpcversh; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 948 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 949 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 950 | freeconfig(cp); |
| 951 | } else { |
| 952 | sep = enter(cp); |
| 953 | } |
| 954 | sep->se_checked = 1; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 955 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 956 | switch (sep->se_family) { |
| 957 | case AF_UNIX: |
| 958 | if (sep->se_fd != -1) |
| 959 | break; |
| 960 | (void) unlink(sep->se_service); |
| 961 | n = strlen(sep->se_service); |
| 962 | if (n > sizeof sep->se_ctrladdr_un.sun_path - 1) |
| 963 | n = sizeof sep->se_ctrladdr_un.sun_path - 1; |
| 964 | safe_strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1); |
| 965 | sep->se_ctrladdr_un.sun_family = AF_UNIX; |
| 966 | sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family; |
| 967 | setup(sep); |
| 968 | break; |
| 969 | case AF_INET: |
| 970 | sep->se_ctrladdr_in.sin_family = AF_INET; |
| 971 | /* se_ctrladdr_in was set in getconfigent */ |
| 972 | sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 973 | |
| 974 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 975 | if (isrpcservice(sep)) { |
| 976 | struct rpcent *rp; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 977 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 978 | sep->se_rpcprog = atoi(sep->se_service); |
| 979 | if (sep->se_rpcprog == 0) { |
| 980 | rp = getrpcbyname(sep->se_service); |
| 981 | if (rp == 0) { |
| 982 | bb_error_msg("%s: unknown rpc service", sep->se_service); |
| 983 | goto serv_unknown; |
| 984 | } |
| 985 | sep->se_rpcprog = rp->r_number; |
| 986 | } |
| 987 | if (sep->se_fd == -1) |
| 988 | setup(sep); |
| 989 | if (sep->se_fd != -1) |
| 990 | register_rpc(sep); |
| 991 | } else |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 992 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 993 | { |
| 994 | u_short port = htons(atoi(sep->se_service)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 995 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 996 | if (!port) { |
| 997 | /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname)); |
| 998 | if (isdigit(protoname[strlen(protoname) - 1])) |
| 999 | protoname[strlen(protoname) - 1] = '\0'; |
| 1000 | sp = getservbyname(sep->se_service, protoname); |
| 1001 | if (sp == 0) { |
| 1002 | bb_error_msg("%s/%s: unknown service", |
| 1003 | sep->se_service, sep->se_proto); |
| 1004 | goto serv_unknown; |
| 1005 | } |
| 1006 | port = sp->s_port; |
| 1007 | } |
| 1008 | if (port != sep->se_ctrladdr_in.sin_port) { |
| 1009 | sep->se_ctrladdr_in.sin_port = port; |
| 1010 | if (sep->se_fd != -1) { |
| 1011 | FD_CLR(sep->se_fd, &allsock); |
| 1012 | nsock--; |
| 1013 | (void) close(sep->se_fd); |
| 1014 | } |
| 1015 | sep->se_fd = -1; |
| 1016 | } |
| 1017 | if (sep->se_fd == -1) |
| 1018 | setup(sep); |
| 1019 | } |
| 1020 | break; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1021 | #ifdef CONFIG_FEATURE_IPV6 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1022 | case AF_INET6: |
| 1023 | sep->se_ctrladdr_in6.sin6_family = AF_INET6; |
| 1024 | /* se_ctrladdr_in was set in getconfigent */ |
| 1025 | sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1026 | |
| 1027 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1028 | if (isrpcservice(sep)) { |
| 1029 | struct rpcent *rp; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1030 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1031 | sep->se_rpcprog = atoi(sep->se_service); |
| 1032 | if (sep->se_rpcprog == 0) { |
| 1033 | rp = getrpcbyname(sep->se_service); |
| 1034 | if (rp == 0) { |
| 1035 | bb_error_msg("%s: unknown rpc service", sep->se_service); |
| 1036 | goto serv_unknown; |
| 1037 | } |
| 1038 | sep->se_rpcprog = rp->r_number; |
| 1039 | } |
| 1040 | if (sep->se_fd == -1) |
| 1041 | setup(sep); |
| 1042 | if (sep->se_fd != -1) |
| 1043 | register_rpc(sep); |
| 1044 | } else |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1045 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1046 | { |
| 1047 | u_short port = htons(atoi(sep->se_service)); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1048 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1049 | if (!port) { |
| 1050 | /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname)); |
| 1051 | if (isdigit(protoname[strlen(protoname) - 1])) |
| 1052 | protoname[strlen(protoname) - 1] = '\0'; |
| 1053 | sp = getservbyname(sep->se_service, protoname); |
| 1054 | if (sp == 0) { |
| 1055 | bb_error_msg("%s/%s: unknown service", |
| 1056 | sep->se_service, sep->se_proto); |
| 1057 | goto serv_unknown; |
| 1058 | } |
| 1059 | port = sp->s_port; |
| 1060 | } |
| 1061 | if (port != sep->se_ctrladdr_in6.sin6_port) { |
| 1062 | sep->se_ctrladdr_in6.sin6_port = port; |
| 1063 | if (sep->se_fd != -1) { |
| 1064 | FD_CLR(sep->se_fd, &allsock); |
| 1065 | nsock--; |
| 1066 | (void) close(sep->se_fd); |
| 1067 | } |
| 1068 | sep->se_fd = -1; |
| 1069 | } |
| 1070 | if (sep->se_fd == -1) |
| 1071 | setup(sep); |
| 1072 | } |
| 1073 | break; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1074 | #endif /* CONFIG_FEATURE_IPV6 */ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1075 | } |
| 1076 | serv_unknown: |
| 1077 | if (cp->se_next != NULL) { |
| 1078 | servtab_t *tmp = cp; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1079 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1080 | cp = cp->se_next; |
| 1081 | free(tmp); |
| 1082 | } else { |
| 1083 | free(cp); |
| 1084 | cp = getconfigent(); |
| 1085 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1086 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1087 | endconfig(); |
| 1088 | /* |
| 1089 | * Purge anything not looked at above. |
| 1090 | */ |
| 1091 | Block_Using_Signals(omask); |
| 1092 | sepp = &servtab; |
| 1093 | while ((sep = *sepp)) { |
| 1094 | if (sep->se_checked) { |
| 1095 | sepp = &sep->se_next; |
| 1096 | continue; |
| 1097 | } |
| 1098 | *sepp = sep->se_next; |
| 1099 | if (sep->se_fd != -1) { |
| 1100 | FD_CLR(sep->se_fd, &allsock); |
| 1101 | nsock--; |
| 1102 | (void) close(sep->se_fd); |
| 1103 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1104 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1105 | if (isrpcservice(sep)) |
| 1106 | unregister_rpc(sep); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1107 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1108 | if (sep->se_family == AF_UNIX) |
| 1109 | (void) unlink(sep->se_service); |
| 1110 | freeconfig(sep); |
| 1111 | free(sep); |
| 1112 | } |
| 1113 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1117 | static void reapchild(int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1118 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1119 | pid_t pid; |
| 1120 | int save_errno = errno, status; |
| 1121 | servtab_t *sep; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1122 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1123 | for (;;) { |
| 1124 | pid = wait3(&status, WNOHANG, NULL); |
| 1125 | if (pid <= 0) |
| 1126 | break; |
| 1127 | for (sep = servtab; sep; sep = sep->se_next) |
| 1128 | if (sep->se_wait == pid) { |
| 1129 | if (WIFEXITED(status) && WEXITSTATUS(status)) |
| 1130 | bb_error_msg("%s: exit status 0x%x", |
| 1131 | sep->se_server, WEXITSTATUS(status)); |
| 1132 | else if (WIFSIGNALED(status)) |
| 1133 | bb_error_msg("%s: exit signal 0x%x", |
| 1134 | sep->se_server, WTERMSIG(status)); |
| 1135 | sep->se_wait = 1; |
| 1136 | FD_SET(sep->se_fd, &allsock); |
| 1137 | nsock++; |
| 1138 | } |
| 1139 | } |
| 1140 | errno = save_errno; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1141 | } |
| 1142 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1143 | static void retry(int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1144 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1145 | servtab_t *sep; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1146 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1147 | timingout = 0; |
| 1148 | for (sep = servtab; sep; sep = sep->se_next) { |
| 1149 | if (sep->se_fd == -1) { |
| 1150 | switch (sep->se_family) { |
| 1151 | case AF_UNIX: |
| 1152 | case AF_INET: |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1153 | #ifdef CONFIG_FEATURE_IPV6 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1154 | case AF_INET6: |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1155 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1156 | setup(sep); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1157 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1158 | if (sep->se_fd != -1 && isrpcservice(sep)) |
| 1159 | register_rpc(sep); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1160 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1161 | break; |
| 1162 | } |
| 1163 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1164 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1165 | } |
| 1166 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1167 | static void goaway(int sig ATTRIBUTE_UNUSED) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1168 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1169 | servtab_t *sep; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1170 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1171 | /* XXX signal race walking sep list */ |
| 1172 | for (sep = servtab; sep; sep = sep->se_next) { |
| 1173 | if (sep->se_fd == -1) |
| 1174 | continue; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1175 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1176 | switch (sep->se_family) { |
| 1177 | case AF_UNIX: |
| 1178 | (void) unlink(sep->se_service); |
| 1179 | break; |
| 1180 | case AF_INET: |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1181 | #ifdef CONFIG_FEATURE_IPV6 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1182 | case AF_INET6: |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1183 | #endif |
| 1184 | #ifdef CONFIG_FEATURE_INETD_RPC |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1185 | if (sep->se_wait == 1 && isrpcservice(sep)) |
| 1186 | unregister_rpc(sep); /* XXX signal race */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1187 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1188 | break; |
| 1189 | } |
| 1190 | (void) close(sep->se_fd); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1191 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1192 | (void) unlink(_PATH_INETDPID); |
| 1193 | exit(0); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | |
| 1197 | #ifdef INETD_SETPROCTITLE |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1198 | static char **Argv; |
| 1199 | static char *LastArg; |
| 1200 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1201 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1202 | inetd_setproctitle(char *a, int s) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1203 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1204 | socklen_t size; |
| 1205 | char *cp; |
| 1206 | struct sockaddr_in prt_sin; |
| 1207 | char buf[80]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1208 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1209 | cp = Argv[0]; |
| 1210 | size = sizeof(prt_sin); |
| 1211 | (void) snprintf(buf, sizeof buf, "-%s", a); |
| 1212 | if (getpeername(s, (struct sockaddr *) &prt_sin, &size) == 0) { |
| 1213 | char *sa = inet_ntoa(prt_sin.sin_addr); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1214 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1215 | buf[sizeof(buf) - 1 - strlen(sa) - 3] = '\0'; |
| 1216 | strcat(buf, " ["); |
| 1217 | strcat(buf, sa); |
| 1218 | strcat(buf, "]"); |
| 1219 | } |
| 1220 | strncpy(cp, buf, LastArg - cp); |
| 1221 | cp += strlen(cp); |
| 1222 | while (cp < LastArg) |
| 1223 | *cp++ = ' '; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1224 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1225 | #endif |
| 1226 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1227 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1228 | int |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1229 | inetd_main(int argc, char *argv[]) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1230 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1231 | servtab_t *sep; |
| 1232 | struct passwd *pwd; |
| 1233 | struct group *grp = NULL; |
| 1234 | int tmpint; |
| 1235 | struct sigaction sa, sapipe; |
| 1236 | int opt; |
| 1237 | pid_t pid; |
| 1238 | char buf[50]; |
| 1239 | char *stoomany; |
| 1240 | sigset_t omask, wait_mask; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1241 | |
| 1242 | #ifdef INETD_SETPROCTITLE |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1243 | extern char **environ; |
| 1244 | char **envp = environ; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1245 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1246 | Argv = argv; |
| 1247 | if (envp == 0 || *envp == 0) |
| 1248 | envp = argv; |
| 1249 | while (*envp) |
| 1250 | envp++; |
| 1251 | LastArg = envp[-1] + strlen(envp[-1]); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1252 | #endif |
| 1253 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1254 | openlog(bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1255 | |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame^] | 1256 | opt = getopt32(argc, argv, "R:f", &stoomany); |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1257 | if(opt & 1) { |
| 1258 | char *e; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1259 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1260 | toomany = strtoul(stoomany, &e, 0); |
| 1261 | if (!(toomany >= 0 && *e == '\0')) { |
| 1262 | toomany = TOOMANY; |
| 1263 | bb_perror_msg("-R %s: bad value for service invocation rate", stoomany); |
| 1264 | } |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1265 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1266 | argc -= optind; |
| 1267 | argv += optind; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1268 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1269 | uid = getuid(); |
| 1270 | if (uid != 0) |
| 1271 | CONFIG = NULL; |
| 1272 | if (argc > 0) |
| 1273 | CONFIG = argv[0]; |
| 1274 | if (CONFIG == NULL) |
| 1275 | bb_error_msg_and_die("non-root must specify a config file"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1276 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1277 | if (!(opt & 2)) { |
Bernhard Reutner-Fischer | c418d48 | 2006-05-31 10:19:51 +0000 | [diff] [blame] | 1278 | #ifdef BB_NOMMU |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1279 | /* reexec for vfork() do continue parent */ |
| 1280 | vfork_daemon_rexec(0, 0, argc, argv, "-f"); |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1281 | #else |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1282 | xdaemon(0, 0); |
Bernhard Reutner-Fischer | c418d48 | 2006-05-31 10:19:51 +0000 | [diff] [blame] | 1283 | #endif |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1284 | } else { |
| 1285 | setsid(); |
Paul Fox | b831753 | 2005-08-01 19:39:47 +0000 | [diff] [blame] | 1286 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1287 | logmode = LOGMODE_SYSLOG; |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 1288 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1289 | if (uid == 0) { |
| 1290 | gid_t gid = getgid(); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1291 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1292 | /* If run by hand, ensure groups vector gets trashed */ |
| 1293 | setgroups(1, &gid); |
| 1294 | } |
| 1295 | |
| 1296 | { |
| 1297 | FILE *fp = fopen(_PATH_INETDPID, "w"); |
| 1298 | |
| 1299 | if (fp != NULL) { |
| 1300 | fprintf(fp, "%u\n", getpid()); |
| 1301 | (void) fclose(fp); |
| 1302 | } |
| 1303 | } |
| 1304 | |
| 1305 | if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) { |
| 1306 | bb_perror_msg("getrlimit"); |
| 1307 | } else { |
| 1308 | rlim_ofile_cur = rlim_ofile.rlim_cur; |
| 1309 | if (rlim_ofile_cur == RLIM_INFINITY) /* ! */ |
| 1310 | rlim_ofile_cur = OPEN_MAX; |
| 1311 | } |
| 1312 | |
| 1313 | memset((char *) &sa, 0, sizeof(sa)); |
| 1314 | sigemptyset(&sa.sa_mask); |
| 1315 | sigaddset(&sa.sa_mask, SIGALRM); |
| 1316 | sigaddset(&sa.sa_mask, SIGCHLD); |
| 1317 | sigaddset(&sa.sa_mask, SIGHUP); |
| 1318 | sa.sa_handler = retry; |
| 1319 | sigaction(SIGALRM, &sa, NULL); |
| 1320 | /* doconfig(); */ |
| 1321 | config(SIGHUP); |
| 1322 | sa.sa_handler = config; |
| 1323 | sigaction(SIGHUP, &sa, NULL); |
| 1324 | sa.sa_handler = reapchild; |
| 1325 | sigaction(SIGCHLD, &sa, NULL); |
| 1326 | sa.sa_handler = goaway; |
| 1327 | sigaction(SIGTERM, &sa, NULL); |
| 1328 | sa.sa_handler = goaway; |
| 1329 | sigaction(SIGINT, &sa, NULL); |
| 1330 | sa.sa_handler = SIG_IGN; |
| 1331 | sigaction(SIGPIPE, &sa, &sapipe); |
| 1332 | memset(&wait_mask, 0, sizeof(wait_mask)); |
| 1333 | { |
| 1334 | /* space for daemons to overwrite environment for ps */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1335 | #define DUMMYSIZE 100 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1336 | char dummy[DUMMYSIZE]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1337 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1338 | (void) memset(dummy, 'x', DUMMYSIZE - 1); |
| 1339 | dummy[DUMMYSIZE - 1] = '\0'; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1340 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1341 | (void) setenv("inetd_dummy", dummy, 1); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1342 | } |
| 1343 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1344 | for (;;) { |
| 1345 | int n, ctrl = -1; |
| 1346 | fd_set readable; |
| 1347 | |
| 1348 | if (nsock == 0) { |
| 1349 | Block_Using_Signals(omask); |
| 1350 | while (nsock == 0) |
| 1351 | sigsuspend(&wait_mask); |
| 1352 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 1353 | } |
| 1354 | |
| 1355 | readable = allsock; |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1356 | n = select(maxsock + 1, &readable, NULL, NULL, NULL); |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1357 | if (n <= 0) { |
| 1358 | if (n < 0 && errno != EINTR) { |
| 1359 | bb_perror_msg("select"); |
| 1360 | sleep(1); |
| 1361 | } |
Glenn L McGrath | 82d42db | 2004-02-18 13:12:53 +0000 | [diff] [blame] | 1362 | continue; |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1363 | } |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1364 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1365 | for (sep = servtab; n && sep; sep = sep->se_next) { |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1366 | if (sep->se_fd == -1 || !FD_ISSET(sep->se_fd, &readable)) |
| 1367 | continue; |
| 1368 | |
| 1369 | n--; |
| 1370 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) { |
| 1371 | ctrl = accept(sep->se_fd, NULL, NULL); |
| 1372 | if (ctrl < 0) { |
| 1373 | if (errno == EINTR) |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1374 | continue; |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1375 | bb_perror_msg("accept (for %s)", sep->se_service); |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1376 | continue; |
| 1377 | } |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1378 | if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) { |
| 1379 | struct sockaddr_in peer; |
| 1380 | socklen_t plen = sizeof(peer); |
| 1381 | |
| 1382 | if (getpeername(ctrl, (struct sockaddr *) &peer, &plen) < 0) { |
| 1383 | bb_error_msg("could not getpeername"); |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1384 | close(ctrl); |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1385 | continue; |
| 1386 | } |
| 1387 | if (ntohs(peer.sin_port) == 20) { |
| 1388 | /* XXX ftp bounce */ |
| 1389 | close(ctrl); |
| 1390 | continue; |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1391 | } |
| 1392 | } |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1393 | } else |
| 1394 | ctrl = sep->se_fd; |
| 1395 | |
| 1396 | Block_Using_Signals(omask); |
| 1397 | pid = 0; |
| 1398 | #ifdef INETD_FEATURE_ENABLED |
| 1399 | if (sep->se_bi == 0 || sep->se_bi->bi_fork) |
| 1400 | #endif |
| 1401 | { |
| 1402 | if (sep->se_count++ == 0) |
| 1403 | (void) gettimeofday(&sep->se_time, NULL); |
| 1404 | else if (toomany > 0 && sep->se_count >= sep->se_max) { |
| 1405 | struct timeval now; |
| 1406 | |
| 1407 | (void) gettimeofday(&now, NULL); |
| 1408 | if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) { |
| 1409 | sep->se_time = now; |
| 1410 | sep->se_count = 1; |
| 1411 | } else { |
| 1412 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1413 | close(ctrl); |
| 1414 | if (sep->se_family == AF_INET && |
| 1415 | ntohs(sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) { |
| 1416 | /* |
| 1417 | * Cannot close it -- there are |
| 1418 | * thieves on the system. |
| 1419 | * Simply ignore the connection. |
| 1420 | */ |
| 1421 | --sep->se_count; |
| 1422 | continue; |
| 1423 | } |
| 1424 | bb_error_msg("%s/%s server failing (looping), service terminated", |
| 1425 | sep->se_service, sep->se_proto); |
| 1426 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1427 | close(ctrl); |
| 1428 | FD_CLR(sep->se_fd, &allsock); |
| 1429 | (void) close(sep->se_fd); |
| 1430 | sep->se_fd = -1; |
| 1431 | sep->se_count = 0; |
| 1432 | nsock--; |
| 1433 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 1434 | if (!timingout) { |
| 1435 | timingout = 1; |
| 1436 | alarm(RETRYTIME); |
| 1437 | } |
| 1438 | continue; |
| 1439 | } |
| 1440 | } |
| 1441 | pid = fork(); |
| 1442 | } |
| 1443 | if (pid < 0) { |
| 1444 | bb_perror_msg("fork"); |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1445 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1446 | close(ctrl); |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1447 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 1448 | sleep(1); |
| 1449 | continue; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1450 | } |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1451 | if (pid && sep->se_wait) { |
| 1452 | sep->se_wait = pid; |
| 1453 | FD_CLR(sep->se_fd, &allsock); |
| 1454 | nsock--; |
| 1455 | } |
| 1456 | sigprocmask(SIG_UNBLOCK, &omask, NULL); |
| 1457 | if (pid == 0) { |
| 1458 | #ifdef INETD_FEATURE_ENABLED |
| 1459 | if (sep->se_bi) { |
| 1460 | (*sep->se_bi->bi_fn)(ctrl, sep); |
| 1461 | } else |
| 1462 | #endif |
| 1463 | { |
| 1464 | pwd = getpwnam(sep->se_user); |
| 1465 | if (pwd == NULL) { |
| 1466 | bb_error_msg("getpwnam: %s: no such user", sep->se_user); |
| 1467 | goto do_exit1; |
| 1468 | } |
| 1469 | if (setsid() < 0) |
| 1470 | bb_perror_msg("%s: setsid", sep->se_service); |
| 1471 | if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) { |
| 1472 | bb_error_msg("getgrnam: %s: no such group", sep->se_group); |
| 1473 | goto do_exit1; |
| 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 | xsetgid((gid_t) pwd->pw_gid); |
| 1483 | initgroups(pwd->pw_name, pwd->pw_gid); |
| 1484 | xsetuid((uid_t) pwd->pw_uid); |
| 1485 | } else if (sep->se_group) { |
| 1486 | xsetgid(grp->gr_gid); |
| 1487 | setgroups(1, &grp->gr_gid); |
| 1488 | } |
| 1489 | dup2(ctrl, 0); |
| 1490 | if (ctrl) close(ctrl); |
| 1491 | dup2(0, 1); |
| 1492 | dup2(0, 2); |
| 1493 | if (rlim_ofile.rlim_cur != rlim_ofile_cur) |
| 1494 | if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) |
| 1495 | bb_perror_msg("setrlimit"); |
| 1496 | closelog(); |
| 1497 | for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;) |
| 1498 | (void) close(tmpint); |
| 1499 | sigaction(SIGPIPE, &sapipe, NULL); |
| 1500 | execv(sep->se_server, sep->se_argv); |
| 1501 | bb_perror_msg("execv %s", sep->se_server); |
| 1502 | do_exit1: |
| 1503 | if (sep->se_socktype != SOCK_STREAM) |
| 1504 | recv(0, buf, sizeof(buf), 0); |
| 1505 | _exit(1); |
| 1506 | } |
| 1507 | } |
| 1508 | if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) |
| 1509 | close(ctrl); |
| 1510 | } /* for (sep = servtab...) */ |
| 1511 | } /* for(;;) */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 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) || \ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1520 | defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \ |
| 1521 | defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME) |
| 1522 | static int dg_badinput(struct sockaddr_in *dg_sin) |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1523 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 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; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 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 |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1537 | echo_stream(int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1538 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1539 | char buffer[BUFSIZE]; |
| 1540 | int i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1541 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1542 | inetd_setproctitle(sep->se_service, s); |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1543 | while (1) { |
| 1544 | i = read(s, buffer, sizeof(buffer)); |
| 1545 | if (i <= 0) break; |
| 1546 | /* FIXME: this isnt correct - safe_write()? */ |
| 1547 | if (write(s, buffer, i) <= 0) break; |
| 1548 | } |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1549 | exit(0); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1550 | } |
| 1551 | |
| 1552 | /* Echo service -- echo data back */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1553 | /* ARGSUSED */ |
| 1554 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1555 | echo_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1556 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1557 | char buffer[BUFSIZE]; |
| 1558 | int i; |
| 1559 | socklen_t size; |
| 1560 | /* struct sockaddr_storage ss; */ |
| 1561 | struct sockaddr sa; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1562 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1563 | size = sizeof(sa); |
| 1564 | i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size); |
| 1565 | if (i < 0) |
| 1566 | return; |
| 1567 | if (dg_badinput((struct sockaddr_in *) &sa)) |
| 1568 | return; |
| 1569 | (void) sendto(s, buffer, i, 0, &sa, sizeof(sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1570 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1571 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1572 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1573 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1574 | /* Discard service -- ignore data */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1575 | /* ARGSUSED */ |
| 1576 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1577 | discard_stream(int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1578 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1579 | char buffer[BUFSIZE]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1580 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1581 | inetd_setproctitle(sep->se_service, s); |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1582 | while (1) { |
| 1583 | errno = 0; |
| 1584 | if (read(s, buffer, sizeof(buffer)) <= 0 && errno != EINTR) |
| 1585 | exit(0); |
| 1586 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1587 | } |
| 1588 | |
| 1589 | /* Discard service -- ignore data */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1590 | /* ARGSUSED */ |
| 1591 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1592 | discard_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1593 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1594 | char buffer[BUFSIZE]; |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1595 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1596 | (void) read(s, buffer, sizeof(buffer)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1597 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1598 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1599 | |
| 1600 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1601 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1602 | #define LINESIZ 72 |
| 1603 | static char ring[128]; |
| 1604 | static char *endring; |
| 1605 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1606 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1607 | initring(void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1608 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1609 | int i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1610 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1611 | endring = ring; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1612 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1613 | for (i = 0; i <= 128; ++i) |
| 1614 | if (isprint(i)) |
| 1615 | *endring++ = i; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1616 | } |
| 1617 | |
| 1618 | /* Character generator */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1619 | /* ARGSUSED */ |
| 1620 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1621 | chargen_stream(int s, servtab_t *sep) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1622 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1623 | char *rs; |
| 1624 | int len; |
| 1625 | char text[LINESIZ + 2]; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1626 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1627 | inetd_setproctitle(sep->se_service, s); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1628 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1629 | if (!endring) { |
| 1630 | initring(); |
| 1631 | rs = ring; |
| 1632 | } |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1633 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1634 | text[LINESIZ] = '\r'; |
| 1635 | text[LINESIZ + 1] = '\n'; |
Denis Vlasenko | c1876d7 | 2006-09-23 15:58:01 +0000 | [diff] [blame] | 1636 | rs = ring; |
| 1637 | for (;;) { |
| 1638 | len = endring - rs; |
| 1639 | if (len >= LINESIZ) |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1640 | memmove(text, rs, LINESIZ); |
| 1641 | else { |
| 1642 | memmove(text, rs, len); |
| 1643 | memmove(text + len, ring, LINESIZ - len); |
| 1644 | } |
| 1645 | if (++rs == endring) |
| 1646 | rs = ring; |
| 1647 | if (write(s, text, sizeof(text)) != sizeof(text)) |
| 1648 | break; |
| 1649 | } |
| 1650 | exit(0); |
| 1651 | } |
| 1652 | |
| 1653 | /* Character generator */ |
| 1654 | /* ARGSUSED */ |
| 1655 | static void |
| 1656 | chargen_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
| 1657 | { |
| 1658 | /* struct sockaddr_storage ss; */ |
| 1659 | struct sockaddr sa; |
| 1660 | static char *rs; |
| 1661 | int len; |
| 1662 | char text[LINESIZ + 2]; |
| 1663 | socklen_t size; |
| 1664 | |
| 1665 | if (endring == 0) { |
| 1666 | initring(); |
| 1667 | rs = ring; |
| 1668 | } |
| 1669 | |
| 1670 | size = sizeof(sa); |
| 1671 | if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0) |
| 1672 | return; |
| 1673 | if (dg_badinput((struct sockaddr_in *) &sa)) |
| 1674 | return; |
| 1675 | |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1676 | if ((len = endring - rs) >= LINESIZ) |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1677 | memmove(text, rs, LINESIZ); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1678 | else { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1679 | memmove(text, rs, len); |
| 1680 | memmove(text + len, ring, LINESIZ - len); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1681 | } |
| 1682 | if (++rs == endring) |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1683 | rs = ring; |
| 1684 | text[LINESIZ] = '\r'; |
| 1685 | text[LINESIZ + 1] = '\n'; |
| 1686 | (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1687 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1688 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1689 | |
| 1690 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1691 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1692 | /* |
| 1693 | * Return a machine readable date and time, in the form of the |
| 1694 | * number of seconds since midnight, Jan 1, 1900. Since gettimeofday |
| 1695 | * returns the number of seconds since midnight, Jan 1, 1970, |
| 1696 | * we must add 2208988800 seconds to this figure to make up for |
| 1697 | * some seventy years Bell Labs was asleep. |
| 1698 | */ |
| 1699 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1700 | static u_int machtime(void) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1701 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1702 | struct timeval tv; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1703 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1704 | if (gettimeofday(&tv, NULL) < 0) { |
| 1705 | fprintf(stderr, "Unable to get time of day\n"); |
| 1706 | return 0L; |
| 1707 | } |
| 1708 | return htonl((u_int) tv.tv_sec + 2208988800UL); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1709 | } |
| 1710 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1711 | /* ARGSUSED */ |
| 1712 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1713 | machtime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1714 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1715 | u_int result; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1716 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1717 | result = machtime(); |
| 1718 | (void) write(s, (char *) &result, sizeof(result)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1719 | } |
| 1720 | |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1721 | /* ARGSUSED */ |
| 1722 | static void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1723 | machtime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1724 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1725 | u_int result; |
| 1726 | /* struct sockaddr_storage ss; */ |
| 1727 | struct sockaddr sa; |
| 1728 | struct sockaddr_in *dg_sin; |
| 1729 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1730 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1731 | size = sizeof(sa); |
| 1732 | if (recvfrom(s, (char *) &result, sizeof(result), 0, &sa, &size) < 0) |
| 1733 | return; |
| 1734 | /* if (dg_badinput((struct sockaddr *)&ss)) */ |
| 1735 | dg_sin = (struct sockaddr_in *) &sa; |
| 1736 | if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST) || |
| 1737 | ntohs(dg_sin->sin_port) < IPPORT_RESERVED / 2) |
| 1738 | return; |
| 1739 | result = machtime(); |
| 1740 | (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1741 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1742 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */ |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1743 | |
| 1744 | |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1745 | #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1746 | /* Return human-readable time of day */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1747 | /* ARGSUSED */ |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1748 | static void daytime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1749 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1750 | char buffer[256]; |
| 1751 | time_t t; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1752 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1753 | t = time(NULL); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1754 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1755 | (void) sprintf(buffer, "%.24s\r\n", ctime(&t)); |
| 1756 | (void) write(s, buffer, strlen(buffer)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1757 | } |
| 1758 | |
| 1759 | /* Return human-readable time of day */ |
"Vladimir N. Oleynik" | 1a2f4d9 | 2005-10-03 08:08:58 +0000 | [diff] [blame] | 1760 | /* ARGSUSED */ |
| 1761 | void |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1762 | daytime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED) |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1763 | { |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1764 | char buffer[256]; |
| 1765 | time_t t; |
| 1766 | /* struct sockaddr_storage ss; */ |
| 1767 | struct sockaddr sa; |
| 1768 | socklen_t size; |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1769 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1770 | t = time(NULL); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1771 | |
Denis Vlasenko | ec17d43 | 2006-09-23 15:18:38 +0000 | [diff] [blame] | 1772 | size = sizeof(sa); |
| 1773 | if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0) |
| 1774 | return; |
| 1775 | if (dg_badinput((struct sockaddr_in *) &sa)) |
| 1776 | return; |
| 1777 | (void) sprintf(buffer, "%.24s\r\n", ctime(&t)); |
| 1778 | (void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa)); |
Glenn L McGrath | 06e9565 | 2003-02-09 06:51:14 +0000 | [diff] [blame] | 1779 | } |
Bernhard Reutner-Fischer | a4acf66 | 2006-04-10 12:26:47 +0000 | [diff] [blame] | 1780 | #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */ |