1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #include <sys/time.h> 35 #include <sys/socket.h> 36 #include <sys/un.h> 37 #include <sys/queue.h> 38 39 #include <netinet/in.h> 40 41 #include <stdio.h> 42 43 #define BUFSIZE 8192 44 #define LINESIZ 72 45 46 #define NORM_TYPE 0 47 #define MUX_TYPE 1 48 #define MUXPLUS_TYPE 2 49 #define FAITH_TYPE 4 50 #define ISMUX(sep) (((sep)->se_type == MUX_TYPE) || \ 51 ((sep)->se_type == MUXPLUS_TYPE)) 52 #define ISMUXPLUS(sep) ((sep)->se_type == MUXPLUS_TYPE) 53 54 struct procinfo { 55 LIST_ENTRY(procinfo) pr_link; 56 pid_t pr_pid; /* child pid */ 57 struct conninfo *pr_conn; 58 }; 59 60 struct conninfo { 61 LIST_ENTRY(conninfo) co_link; 62 struct sockaddr_storage co_addr; /* source address */ 63 int co_numchild; /* current number of children */ 64 struct procinfo **co_proc; /* array of child proc entry */ 65 }; 66 67 #define PERIPSIZE 256 68 69 struct stabchild { 70 LIST_ENTRY(stabchild) sc_link; 71 pid_t sc_pid; 72 }; 73 74 struct servtab { 75 char *se_service; /* name of service */ 76 int se_socktype; /* type of socket to use */ 77 int se_family; /* address family */ 78 char *se_proto; /* protocol used */ 79 int se_maxchild; /* max number of children */ 80 int se_maxcpm; /* max connects per IP per minute */ 81 int se_numchild; /* current number of children */ 82 char *se_user; /* user name to run as */ 83 char *se_group; /* group name to run as */ 84 #ifdef LOGIN_CAP 85 char *se_class; /* login class name to run with */ 86 #endif 87 struct biltin *se_bi; /* if built-in, description */ 88 char *se_server; /* server program */ 89 char *se_server_name; /* server program without path */ 90 #define MAXARGV 20 91 char *se_argv[MAXARGV+1]; /* program arguments */ 92 #ifdef IPSEC 93 char *se_policy; /* IPsec policy string */ 94 #endif 95 int se_fd; /* open descriptor */ 96 union { /* bound address */ 97 struct sockaddr se_un_ctrladdr; 98 struct sockaddr_in se_un_ctrladdr4; 99 struct sockaddr_in6 se_un_ctrladdr6; 100 struct sockaddr_un se_un_ctrladdr_un; 101 } se_un; 102 #define se_ctrladdr se_un.se_un_ctrladdr 103 #define se_ctrladdr4 se_un.se_un_ctrladdr4 104 #define se_ctrladdr6 se_un.se_un_ctrladdr6 105 #define se_ctrladdr_un se_un.se_un_ctrladdr_un 106 socklen_t se_ctrladdr_size; 107 uid_t se_sockuid; /* Owner for unix domain socket */ 108 gid_t se_sockgid; /* Group for unix domain socket */ 109 mode_t se_sockmode; /* Mode for unix domain socket */ 110 u_char se_type; /* type: normal, mux, or mux+ */ 111 u_char se_checked; /* looked at during merge */ 112 u_char se_accept; /* i.e., wait/nowait mode */ 113 u_char se_rpc; /* ==1 if RPC service */ 114 int se_rpc_prog; /* RPC program number */ 115 u_int se_rpc_lowvers; /* RPC low version */ 116 u_int se_rpc_highvers; /* RPC high version */ 117 int se_count; /* number started since se_time */ 118 struct timespec se_time; /* start of se_count */ 119 struct servtab *se_next; 120 struct se_flags { 121 u_int se_nomapped : 1; 122 u_int se_reset : 1; 123 } se_flags; 124 int se_maxperip; /* max number of children per src */ 125 LIST_HEAD(, conninfo) se_conn[PERIPSIZE]; 126 LIST_HEAD(, stabchild) se_children; 127 }; 128 129 #define se_nomapped se_flags.se_nomapped 130 #define se_reset se_flags.se_reset 131 132 #define SERVTAB_AT_LIMIT(sep) \ 133 ((sep)->se_maxchild > 0 && (sep)->se_numchild == (sep)->se_maxchild) 134 #define SERVTAB_EXCEEDS_LIMIT(sep) \ 135 ((sep)->se_maxchild > 0 && (sep)->se_numchild >= (sep)->se_maxchild) 136 137 int check_loop(const struct sockaddr *, const struct servtab *sep); 138 void inetd_setproctitle(const char *, int); 139 struct servtab *tcpmux(int); 140 141 extern int debug; 142 extern struct servtab *servtab; 143 144 typedef void (bi_fn_t)(int, struct servtab *); 145 146 struct biltin { 147 const char *bi_service; /* internally provided service name */ 148 int bi_socktype; /* type of socket supported */ 149 short bi_fork; /* 1 if should fork before call */ 150 int bi_maxchild; /* max number of children, -1=default */ 151 bi_fn_t *bi_fn; /* function which performs it */ 152 }; 153 extern struct biltin biltins[]; 154