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      1 /*	$NetBSD: dns_str_resflags.c,v 1.3 2023/12/23 20:30:43 christos Exp $	*/
      2 
      3 /*++
      4 /* NAME
      5 /*	dns_str_resflags 3
      6 /* SUMMARY
      7 /*	convert resolver flags to printable form
      8 /* SYNOPSIS
      9 /*	#include <dns.h>
     10 /*
     11 /*	const char *dns_str_resflags(mask)
     12 /*	unsigned long mask;
     13 /* DESCRIPTION
     14 /*	dns_str_resflags() converts RES_* resolver(5) flags from internal
     15 /*	form to printable string. Individual flag names are separated
     16 /*	with '|'.  The result is overwritten with each call.
     17 /* LICENSE
     18 /* .ad
     19 /* .fi
     20 /*	The Secure Mailer license must be distributed with this software.
     21 /* AUTHOR(S)
     22 /*	Wietse Venema
     23 /*	Google, Inc.
     24 /*	111 8th Avenue
     25 /*	New York, NY 10011, USA
     26 /*
     27 /*	Viktor Dukhovni
     28 /*--*/
     29 
     30  /*
     31   * System library.
     32   */
     33 #include <sys_defs.h>
     34 #include <netinet/in.h>
     35 #include <arpa/nameser.h>
     36 #include <resolv.h>
     37 
     38  /*
     39   * Utility library.
     40   */
     41 #include <name_mask.h>
     42 
     43  /*
     44   * DNS library.
     45   */
     46 #include <dns.h>
     47 
     48  /*
     49   * Application-specific.
     50   */
     51 
     52  /*
     53   * This list overlaps with dns_res_opt_masks[] in smtp.c, but there we
     54   * permit only a small subset of all possible flags.
     55   */
     56 static const LONG_NAME_MASK resflag_table[] = {
     57     "RES_INIT", RES_INIT,
     58     "RES_DEBUG", RES_DEBUG,
     59 #if defined(RES_AAONLY) && !HAVE_GLIBC_API_VERSION_SUPPORT(2, 24)
     60     "RES_AAONLY", RES_AAONLY,
     61 #endif
     62     "RES_USEVC", RES_USEVC,
     63 #if defined(RES_PRIMARY) && !HAVE_GLIBC_API_VERSION_SUPPORT(2, 24)
     64     "RES_PRIMARY", RES_PRIMARY,
     65 #endif
     66     "RES_IGNTC", RES_IGNTC,
     67     "RES_RECURSE", RES_RECURSE,
     68     "RES_DEFNAMES", RES_DEFNAMES,
     69     "RES_STAYOPEN", RES_STAYOPEN,
     70     "RES_DNSRCH", RES_DNSRCH,
     71 #ifdef RES_INSECURE1
     72     "RES_INSECURE1", RES_INSECURE1,
     73 #endif
     74 #ifdef RES_INSECURE2
     75     "RES_INSECURE2", RES_INSECURE2,
     76 #endif
     77     "RES_NOALIASES", RES_NOALIASES,
     78 #ifdef RES_USE_INET6
     79     "RES_USE_INET6", RES_USE_INET6,
     80 #endif
     81 #ifdef RES_ROTATE
     82     "RES_ROTATE", RES_ROTATE,
     83 #endif
     84 #if defined(RES_NOCHECKNAME) && !HAVE_GLIBC_API_VERSION_SUPPORT(2, 24)
     85     "RES_NOCHECKNAME", RES_NOCHECKNAME,
     86 #endif
     87     "RES_USE_EDNS0", RES_USE_EDNS0,
     88     "RES_USE_DNSSEC", RES_USE_DNSSEC,
     89 #if defined(RES_KEEPTSIG) && !HAVE_GLIBC_API_VERSION_SUPPORT(2, 24)
     90     "RES_KEEPTSIG", RES_KEEPTSIG,
     91 #endif
     92 #if defined(RES_BLAST) && !HAVE_GLIBC_API_VERSION_SUPPORT(2, 24)
     93     "RES_BLAST", RES_BLAST,
     94 #endif
     95 #ifdef RES_USEBSTRING
     96     "RES_USEBSTRING", RES_USEBSTRING,
     97 #endif
     98 #ifdef RES_NSID
     99     "RES_NSID", RES_NSID,
    100 #endif
    101 #ifdef RES_NOIP6DOTINT
    102     "RES_NOIP6DOTINT", RES_NOIP6DOTINT,
    103 #endif
    104 #ifdef RES_USE_DNAME
    105     "RES_USE_DNAME", RES_USE_DNAME,
    106 #endif
    107 #ifdef RES_NO_NIBBLE2
    108     "RES_NO_NIBBLE2", RES_NO_NIBBLE2,
    109 #endif
    110 #ifdef RES_SNGLKUP
    111     "RES_SNGLKUP", RES_SNGLKUP,
    112 #endif
    113 #ifdef RES_SNGLKUPREOP
    114     "RES_SNGLKUPREOP", RES_SNGLKUPREOP,
    115 #endif
    116 #ifdef RES_NOTLDQUERY
    117     "RES_NOTLDQUERY", RES_NOTLDQUERY,
    118 #endif
    119     0,
    120 };
    121 
    122 /* dns_str_resflags - convert RES_* resolver flags to printable form */
    123 
    124 const char *dns_str_resflags(unsigned long mask)
    125 {
    126     static VSTRING *buf;
    127 
    128     if (buf == 0)
    129 	buf = vstring_alloc(20);
    130     return (str_long_name_mask_opt(buf, "dsns_str_resflags", resflag_table,
    131 				   mask, NAME_MASK_NUMBER | NAME_MASK_PIPE));
    132 }
    133