diff options
Diffstat (limited to 'dirmngr/dns-stuff.c')
| -rw-r--r-- | dirmngr/dns-stuff.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/dirmngr/dns-stuff.c b/dirmngr/dns-stuff.c index 0d069a365..8d5d1680b 100644 --- a/dirmngr/dns-stuff.c +++ b/dirmngr/dns-stuff.c @@ -47,7 +47,9 @@ #include <unistd.h> /* William Ahern's DNS library, included as a source copy. */ -#include "dns.h" +#ifdef USE_LIBDNS +# include "dns.h" +#endif /* dns.c has a dns_p_free but it is not exported. We use our own * wrapper here so that we do not accidentally use xfree which would @@ -101,6 +103,9 @@ /* If set force the use of the standard resolver. */ static int standard_resolver; +/* If set use recursive resolver when available. */ +static int recursive_resolver; + /* If set Tor mode shall be used. */ static int tor_mode; @@ -111,6 +116,7 @@ static char tor_nameserver[40+20]; /* A string to hold the credentials presented to Tor. */ static char tor_credentials[50]; +#ifdef USE_LIBDNS /* Libdns gobal data. */ struct { @@ -120,7 +126,7 @@ struct struct sockaddr_storage socks_host; } libdns; - +#endif /*USE_LIBDNS*/ /* Calling this function with YES set to True forces the use of the * standard resolver even if dirmngr has been built with support for @@ -140,6 +146,27 @@ standard_resolver_p (void) } +/* Calling this function with YES switches libdns into recursive mode. + * It has no effect on the standard resolver. */ +void +enable_recursive_resolver (int yes) +{ + recursive_resolver = yes; +} + + +/* Return true iff the recursive resolver is used. */ +int +recursive_resolver_p (void) +{ +#if USE_LIBDNS + return !standard_resolver && recursive_resolver; +#else + return 0; +#endif +} + + /* Sets the module in Tor mode. Returns 0 is this is possible or an error code. */ gpg_error_t @@ -233,6 +260,7 @@ map_eai_to_gpg_error (int ec) } +#ifdef USE_LIBDNS static gpg_error_t libdns_error_to_gpg_error (int serr) { @@ -266,8 +294,10 @@ libdns_error_to_gpg_error (int serr) } return gpg_error (ec); } +#endif /*USE_LIBDNS*/ +#ifdef USE_LIBDNS static gpg_error_t libdns_init (void) { @@ -297,7 +327,9 @@ libdns_init (void) goto leave; /* dns_hints_local for stub mode, dns_hints_root for recursive. */ - libdns.hints = dns_hints_local (libdns.resolv_conf, &error); + libdns.hints = (recursive_resolver + ? dns_hints_root (libdns.resolv_conf, &error) + : dns_hints_local (libdns.resolv_conf, &error)); if (! libdns.hints) goto leave; @@ -305,8 +337,10 @@ libdns_init (void) leave: return libdns_error_to_gpg_error (error); } +#endif /*USE_LIBDNS*/ +#ifdef USE_LIBDNS static gpg_error_t resolve_name_libdns (const char *name, unsigned short port, int want_family, int want_socktype, @@ -431,6 +465,7 @@ resolve_name_libdns (const char *name, unsigned short port, return err; } +#endif /*USE_LIBDNS*/ /* Resolve a name using the standard system function. */ @@ -615,9 +650,11 @@ resolve_dns_name (const char *name, unsigned short port, int want_family, int want_socktype, dns_addrinfo_t *r_ai, char **r_canonname) { +#ifdef USE_LIBDNS if (!standard_resolver) return resolve_name_libdns (name, port, want_family, want_socktype, r_ai, r_canonname); +#endif /*USE_LIBDNS*/ return resolve_name_standard (name, port, want_family, want_socktype, r_ai, r_canonname); @@ -714,6 +751,7 @@ is_onion_address (const char *name) /* libdns version of get_dns_cert. */ +#ifdef USE_LIBDNS static gpg_error_t get_dns_cert_libdns (const char *name, int want_certtype, void **r_key, size_t *r_keylen, @@ -726,7 +764,6 @@ get_dns_cert_libdns (const char *name, int want_certtype, struct dns_rr_i rri; char host[DNS_D_MAXNAME + 1]; int derr; - int srvcount = 0; int qtype; /* Gte the query type from WANT_CERTTYPE (which in general indicates @@ -907,6 +944,7 @@ get_dns_cert_libdns (const char *name, int want_certtype, dns_res_close (res); return err; } +#endif /*USE_LIBDNS*/ /* Standard resolver version of get_dns_cert. */ @@ -1135,9 +1173,11 @@ get_dns_cert (const char *name, int want_certtype, *r_fprlen = 0; *r_url = NULL; +#ifdef USE_LIBDNS if (!standard_resolver) return get_dns_cert_libdns (name, want_certtype, r_key, r_keylen, r_fpr, r_fprlen, r_url); +#endif /*USE_LIBDNS*/ return get_dns_cert_standard (name, want_certtype, r_key, r_keylen, r_fpr, r_fprlen, r_url); @@ -1160,6 +1200,7 @@ priosort(const void *a,const void *b) /* Libdns based helper for getsrv. Note that it is expected that NULL * is stored at the address of LIST and 0 is stored at the address of * R_COUNT. */ +#ifdef USE_LIBDNS static gpg_error_t getsrv_libdns (const char *name, struct srventry **list, int *r_count) { @@ -1274,6 +1315,7 @@ getsrv_libdns (const char *name, struct srventry **list, int *r_count) dns_res_close (res); return err; } +#endif /*USE_LIBDNS*/ /* Standard resolver based helper for getsrv. Note that it is @@ -1412,9 +1454,11 @@ getsrv (const char *name, struct srventry **list) *list = NULL; srvcount = 0; +#ifdef USE_LIBDNS if (!standard_resolver) err = getsrv_libdns (name, list, &srvcount); else +#endif /*USE_LIBDNS*/ err = getsrv_standard (name, list, &srvcount); if (err) @@ -1498,6 +1542,7 @@ getsrv (const char *name, struct srventry **list) +#ifdef USE_LIBDNS /* libdns version of get_dns_cname. */ gpg_error_t get_dns_cname_libdns (const char *name, char **r_cname) @@ -1505,7 +1550,6 @@ get_dns_cname_libdns (const char *name, char **r_cname) gpg_error_t err; struct dns_resolver *res = NULL; struct dns_packet *ans = NULL; - struct dns_rr rr; struct dns_cname cname; int derr; @@ -1582,6 +1626,7 @@ get_dns_cname_libdns (const char *name, char **r_cname) dns_res_close (res); return err; } +#endif /*USE_LIBDNS*/ /* Standard resolver version of get_dns_cname. */ @@ -1673,8 +1718,10 @@ get_dns_cname (const char *name, char **r_cname) { *r_cname = NULL; +#ifdef USE_LIBDNS if (!standard_resolver) return get_dns_cname_libdns (name, r_cname); +#endif /*USE_LIBDNS*/ return get_dns_cname_standard (name, r_cname); } |