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