misc: remove unused doh flags when CURL_DISABLE_DOH is defined

Closes #8148

lib/hostip.c

@@ -609,7 +609,11 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
   enum resolve_t rc = CURLRESOLV_ERROR; /* default to failure */
   struct connectdata *conn = data->conn;
   *entry = NULL;
+#ifndef CURL_DISABLE_DOH
   conn->bits.doh = FALSE; /* default is not */
+#else
+  (void)allowDOH;
+#endif
 
   if(data->share)
     Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
@@ -630,11 +634,15 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
 
     struct Curl_addrinfo *addr = NULL;
     int respwait = 0;
+#if !defined(CURL_DISABLE_DOH) || !defined(USE_RESOLVE_ON_IPS)
     struct in_addr in;
+#endif
+#ifndef CURL_DISABLE_DOH
 #ifndef USE_RESOLVE_ON_IPS
     const
 #endif
       bool ipnum = FALSE;
+#endif
 
     /* notify the resolver start callback */
     if(data->set.resolver_start) {
@@ -686,6 +694,7 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
 #endif /* ENABLE_IPV6 */
 
 #else /* if USE_RESOLVE_ON_IPS */
+#ifndef CURL_DISABLE_DOH
     /* First check if this is an IPv4 address string */
     if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
       /* This is a dotted IP address 123.123.123.123-style */
@@ -699,6 +708,7 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
         ipnum = TRUE;
     }
 #endif /* ENABLE_IPV6 */
+#endif /* CURL_DISABLE_DOH */
 
 #endif /* !USE_RESOLVE_ON_IPS */
 
@@ -708,8 +718,10 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
 
       if(strcasecompare(hostname, "localhost"))
         addr = get_localhost(port);
+#ifndef CURL_DISABLE_DOH
       else if(allowDOH && data->set.doh && !ipnum)
         addr = Curl_doh(data, hostname, port, &respwait);
+#endif
       else {
         /* Check what IP specifics the app has requested and if we can provide
          * it. If not, bail out. */
@@ -1210,9 +1222,10 @@ CURLcode Curl_resolv_check(struct Curl_easy *data,
 #if defined(CURL_DISABLE_DOH) && !defined(CURLRES_ASYNCH)
   (void)dns;
 #endif
-
+#ifndef CURL_DISABLE_DOH
   if(data->conn->bits.doh)
     return Curl_doh_is_resolved(data, dns);
+#endif
   return Curl_resolver_is_resolved(data, dns);
 }
 
@@ -1220,10 +1233,12 @@ int Curl_resolv_getsock(struct Curl_easy *data,
                         curl_socket_t *socks)
 {
 #ifdef CURLRES_ASYNCH
+#ifndef CURL_DISABLE_DOH
   if(data->conn->bits.doh)
     /* nothing to wait for during DoH resolve, those handles have their own
        sockets */
     return GETSOCK_BLANK;
+#endif
   return Curl_resolver_getsock(data, socks);
 #else
   (void)data;

lib/setopt.c

@@ -1870,6 +1870,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
         data->set.ssl.primary.verifypeer;
     }
     break;
+#ifndef CURL_DISABLE_DOH
   case CURLOPT_DOH_SSL_VERIFYPEER:
     /*
      * Enable peer SSL verifying for DoH.
@@ -1877,6 +1878,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     data->set.doh_verifypeer = (0 != va_arg(param, long)) ?
       TRUE : FALSE;
     break;
+#endif
 #ifndef CURL_DISABLE_PROXY
   case CURLOPT_PROXY_SSL_VERIFYPEER:
     /*
@@ -1909,6 +1911,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
         data->set.ssl.primary.verifyhost;
     }
     break;
+#ifndef CURL_DISABLE_DOH
   case CURLOPT_DOH_SSL_VERIFYHOST:
     /*
      * Enable verification of the host name in the peer certificate for DoH
@@ -1918,6 +1921,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     /* Treat both 1 and 2 as TRUE */
     data->set.doh_verifyhost = (bool)((arg & 3) ? TRUE : FALSE);
     break;
+#endif
 #ifndef CURL_DISABLE_PROXY
   case CURLOPT_PROXY_SSL_VERIFYHOST:
     /*
@@ -1953,6 +1957,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
         data->set.ssl.primary.verifystatus;
     }
     break;
+#ifndef CURL_DISABLE_DOH
   case CURLOPT_DOH_SSL_VERIFYSTATUS:
     /*
      * Enable certificate status verifying for DoH.
@@ -1965,6 +1970,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     data->set.doh_verifystatus = (0 != va_arg(param, long)) ?
       TRUE : FALSE;
     break;
+#endif
   case CURLOPT_SSL_CTX_FUNCTION:
     /*
      * Set a SSL_CTX callback

lib/url.c

@@ -540,8 +540,10 @@ CURLcode Curl_init_userdefined(struct Curl_easy *data)
    * libcurl 7.10 introduced SSL verification *by default*! This needs to be
    * switched off unless wanted.
    */
+#ifndef CURL_DISABLE_DOH
   set->doh_verifyhost = TRUE;
   set->doh_verifypeer = TRUE;
+#endif
   set->ssl.primary.verifypeer = TRUE;
   set->ssl.primary.verifyhost = TRUE;
 #ifdef USE_TLS_SRP

lib/urldata.h

@@ -518,7 +518,9 @@ struct ConnectBits {
   BIT(tls_enable_npn);  /* TLS NPN extension? */
   BIT(tls_enable_alpn); /* TLS ALPN extension? */
   BIT(connect_only);
+#ifndef CURL_DISABLE_DOH
   BIT(doh);
+#endif
 #ifdef USE_UNIX_SOCKETS
   BIT(abstract_unix_socket);
 #endif
@@ -1858,10 +1860,12 @@ struct UserDefined {
                            header */
   BIT(abstract_unix_socket);
   BIT(disallow_username_in_url); /* disallow username in url */
+#ifndef CURL_DISABLE_DOH
   BIT(doh); /* DNS-over-HTTPS enabled */
   BIT(doh_verifypeer);     /* DoH certificate peer verification */
   BIT(doh_verifyhost);     /* DoH certificate hostname verification */
   BIT(doh_verifystatus);   /* DoH certificate status verification */
+#endif
   BIT(http09_allowed); /* allow HTTP/0.9 responses */
   BIT(mail_rcpt_allowfails); /* allow RCPT TO command to fail for some
                                 recipients */