domain_list.c

[詳解]

/*++
/* NAME
/*  domain_list 3
/* SUMMARY
/*  match a host or domain name against a pattern list
/* SYNOPSIS
/*  #include <domain_list.h>
/*
/*  DOMAIN_LIST *domain_list_init(pname, flags, pattern_list)
/*  const char *pname;
/*  int flags;
/*  const char *pattern_list;
/*
/*  int domain_list_match(list, name)
/*  DOMAIN_LIST *list;
/*  const char *name;
/*
/*  void domain_list_free(list)
/*  DOMAIN_LIST *list;
/* DESCRIPTION
/*  This is a convenience wrapper around the match_list module.
/*
/*  This module implements tests for list membership of a host or
/*  domain name.
/*
/*  Patterns are separated by whitespace and/or commas. A pattern
/*  is either a string, a file name (in which case the contents
/*  of the file are substituted for the file name) or a type:name
/*  lookup table specification.
/*
/*  A host name matches a domain list when its name appears in the
/*  list of domain patterns, or when any of its parent domains appears
/*  in the list of domain patterns. The matching process is case
/*  insensitive. In order to reverse the result, precede a
/*  pattern with an exclamation point (!).
/*
/*  domain_list_init() performs initializations. The pname
/*  argument specifies error reporting context. The flags argument
/*  is the bit-wise OR of zero or more of the following:
/* .IP MATCH_FLAG_PARENT
/*  The hostname pattern foo.com matches itself and any name below
/*  the domain foo.com. If this flag is cleared, foo.com matches itself
/*  only, and .foo.com matches any name below the domain foo.com.
/* .IP MATCH_FLAG_RETURN
/*  Request that domain_list_match() logs a warning and returns
/*  zero, with list->error set to a non-zero dictionary error
/*  code, instead of raising a fatal error.
/* .PP
/*  Specify MATCH_FLAG_NONE to request none of the above.
/*  The last argument is a list of domain patterns, or the name of
/*  a file containing domain patterns.
/*
/*  domain_list_match() matches the specified host or domain name
/*  against the specified pattern list.
/*
/*  domain_list_free() releases storage allocated by domain_list_init().
/* DIAGNOSTICS
/*  Fatal error: unable to open or read a domain_list file; invalid
/*  domain_list pattern.
/* SEE ALSO
/*  match_list(3) generic list matching
/*  match_ops(3) match hosts by name or by address
/* LICENSE
/* .ad
/* .fi
/*  The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*  Wietse Venema
/*  IBM T.J. Watson Research
/*  P.O. Box 704
/*  Yorktown Heights, NY 10598, USA
/*--*/

/* System library. */

#include <sys_defs.h>

/* Utility library. */

#include <match_list.h>

/* Global library. */

#include "domain_list.h"

#ifdef TEST

#include <stdlib.h>
#include <unistd.h>
#include <msg.h>
#include <vstream.h>
#include <msg_vstream.h>
#include <dict.h>
#include <stringops.h>          /* util_utf8_enable */

static void usage(char *progname)
{
    msg_fatal("usage: %s [-v] patterns hostname", progname);
}

int     main(int argc, char **argv)
{
    DOMAIN_LIST *list;
    char   *host;
    int     ch;

    msg_vstream_init(argv[0], VSTREAM_ERR);

    while ((ch = GETOPT(argc, argv, "v")) > 0) {
    switch (ch) {
    case 'v':
        msg_verbose++;
        break;
    default:
        usage(argv[0]);
    }
    }
    if (argc != optind + 2)
    usage(argv[0]);
    dict_allow_surrogate = 1;
    util_utf8_enable = 1;
    list = domain_list_init("command line", MATCH_FLAG_PARENT
                | MATCH_FLAG_RETURN, argv[optind]);
    host = argv[optind + 1];
    vstream_printf("%s: %s\n", host, domain_list_match(list, host) ?
           "YES" : list->error == 0 ? "NO" : "ERROR");
    vstream_fflush(VSTREAM_OUT);
    domain_list_free(list);
    return (0);
}

#endif