usr.sbin/inetd/inetd.h

   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  timeval 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 };