MG_DISABLE_(DNS|(_SYNC)?_RESOLVER) -> MG_ENABLE_$1

Disable sync resolver by default.

PUBLISHED_FROM=dbaed194e5fe211c07564fe6880649a1aee7f662

docs/c-api/net.h/intro.md

@@ -19,6 +19,7 @@ items:
   - { name: mg_printf.md }
   - { name: mg_vprintf.md }
   - { name: mg_socketpair.md }
+  - { name: mg_resolve.md }
   - { name: mg_check_ip_acl.md }
   - { name: mg_enable_multithreading.md }
   - { name: mg_enable_javascript.md }

docs/c-api/net.h/mg_resolve.md

+---
+title: "mg_resolve()"
+decl_name: "mg_resolve"
+symbol_kind: "func"
+signature: |
+  int mg_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_len);
+---
+
+Convert domain name into IP address.
+
+This is a utility function. If compilation flags have
+`-DMG_ENABLE_GETADDRINFO`, then `getaddrinfo()` call is used for name
+resolution. Otherwise, `gethostbyname()` is used.
+
+CAUTION: this function can block.
+Return 1 on success, 0 on failure. 
+

mongoose.c

@@ -1980,7 +1980,7 @@ int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
   return len;
 }
 
-#if !MG_DISABLE_SYNC_RESOLVER
+#if MG_ENABLE_SYNC_RESOLVER
 /* TODO(lsm): use non-blocking resolver */
 static int mg_resolve2(const char *host, struct in_addr *ina) {
 #if MG_ENABLE_GETADDRINFO
@@ -2016,7 +2016,7 @@ int mg_resolve(const char *host, char *buf, size_t n) {
   struct in_addr ad;
   return mg_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0;
 }
-#endif /* MG_DISABLE_SYNC_RESOLVER */
+#endif /* MG_ENABLE_SYNC_RESOLVER */
 
 MG_INTERNAL struct mg_connection *mg_create_connection_base(
     struct mg_mgr *mgr, mg_event_handler_t callback,
@@ -2107,7 +2107,7 @@ MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa,
     sa->sin6.sin6_family = AF_INET6;
     sa->sin.sin_port = htons((uint16_t) port);
 #endif
-#if !MG_DISABLE_RESOLVER
+#if MG_ENABLE_ASYNC_RESOLVER
   } else if (strlen(str) < host_len &&
              sscanf(str, "%[^ :]:%u%n", host, &port, &len) == 2) {
     sa->sin.sin_port = htons((uint16_t) port);
@@ -2122,7 +2122,7 @@ MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa,
         return 0;
       }
 
-#if !MG_DISABLE_SYNC_RESOLVER
+#if MG_ENABLE_SYNC_RESOLVER
       if (!mg_resolve2(host, &sa->sin.sin_addr)) {
         return -1;
       }
@@ -2482,7 +2482,7 @@ void mg_if_connect_cb(struct mg_connection *nc, int err) {
   mg_call(nc, NULL, MG_EV_CONNECT, &err);
 }
 
-#if !MG_DISABLE_RESOLVER
+#if MG_ENABLE_ASYNC_RESOLVER
 /*
  * Callback for the async resolver on mg_connect_opt() call.
  * Main task of this function is to trigger MG_EV_CONNECT event with
@@ -2600,7 +2600,7 @@ struct mg_connection *mg_connect_opt(struct mg_mgr *mgr, const char *address,
 #endif /* MG_ENABLE_SSL */
 
   if (rc == 0) {
-#if !MG_DISABLE_RESOLVER
+#if MG_ENABLE_ASYNC_RESOLVER
     /*
      * DNS resolution is required for host.
      * mg_parse_address() fills port in nc->sa, which we pass to resolve_cb()
@@ -8548,7 +8548,7 @@ struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *brk,
  * All rights reserved
  */
 
-#if !MG_DISABLE_DNS
+#if MG_ENABLE_DNS
 
 /* Amalgamated: #include "mongoose/src/internal.h" */
 /* Amalgamated: #include "mongoose/src/dns.h" */
@@ -8911,7 +8911,7 @@ void mg_set_protocol_dns(struct mg_connection *nc) {
   nc->proto_handler = dns_handler;
 }
 
-#endif /* MG_DISABLE_DNS */
+#endif /* MG_ENABLE_DNS */
 #ifdef MG_MODULE_LINES
 #line 1 "mongoose/src/dns_server.c"
 #endif
@@ -8994,7 +8994,7 @@ int mg_dns_reply_record(struct mg_dns_reply *reply,
  * All rights reserved
  */
 
-#if !MG_DISABLE_RESOLVER
+#if MG_ENABLE_ASYNC_RESOLVER
 
 /* Amalgamated: #include "mongoose/src/internal.h" */
 /* Amalgamated: #include "mongoose/src/resolv.h" */
@@ -9255,7 +9255,7 @@ int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query,
   return 0;
 }
 
-#endif /* MG_DISABLE_RESOLVE */
+#endif /* MG_ENABLE_ASYNC_RESOLVER */
 #ifdef MG_MODULE_LINES
 #line 1 "mongoose/src/coap.c"
 #endif

mongoose.h

@@ -497,7 +497,6 @@ void mg_lwip_set_keepalive_params(struct mg_connection *nc, int idle,
 #include <time.h>
 
 #define MG_NET_IF MG_NET_IF_SIMPLELINK
-#define MG_DISABLE_SYNC_RESOLVER 1
 
 /*
  * CC3100 SDK and STM32 SDK include headers w/out path, just like
@@ -551,7 +550,6 @@ int inet_pton(int af, const char *src, void *dst);
 #endif
 
 #define MG_NET_IF MG_NET_IF_SIMPLELINK
-#define MG_DISABLE_SYNC_RESOLVER 1
 
 /* Only SPIFFS supports directories, SLFS does not. */
 #if defined(CC3200_FS_SPIFFS) && !defined(MG_ENABLE_DIRECTORY_LISTING)
@@ -686,7 +684,6 @@ struct dirent *readdir(DIR *dir);
 #endif
 
 #define MG_NET_IF MG_NET_IF_SIMPLELINK
-#define MG_DISABLE_SYNC_RESOLVER 1
 
 /* Amalgamated: #include "common/platforms/simplelink/cs_simplelink.h" */
 
@@ -1421,10 +1418,6 @@ const char *c_strnstr(const char *s, const char *find, size_t slen);
 #ifndef CS_MONGOOSE_SRC_FEATURES_H_
 #define CS_MONGOOSE_SRC_FEATURES_H_
 
-#ifndef MG_DISABLE_DNS
-#define MG_DISABLE_DNS 0
-#endif
-
 #ifndef MG_DISABLE_HTTP_DIGEST_AUTH
 #define MG_DISABLE_HTTP_DIGEST_AUTH 0
 #endif
@@ -1437,18 +1430,14 @@ const char *c_strnstr(const char *s, const char *find, size_t slen);
 #define MG_DISABLE_PFS 0
 #endif
 
-#ifndef MG_DISABLE_RESOLVER
-#define MG_DISABLE_RESOLVER 0
-#endif
-
-#ifndef MG_DISABLE_SYNC_RESOLVER
-#define MG_DISABLE_SYNC_RESOLVER 0
-#endif
-
 #ifndef MG_DISABLE_WS_RANDOM_MASK
 #define MG_DISABLE_WS_RANDOM_MASK 0
 #endif
 
+#ifndef MG_ENABLE_ASYNC_RESOLVER
+#define MG_ENABLE_ASYNC_RESOLVER 1
+#endif
+
 #ifndef MG_ENABLE_BROADCAST
 #define MG_ENABLE_BROADCAST 0
 #endif
@@ -1465,6 +1454,10 @@ const char *c_strnstr(const char *s, const char *find, size_t slen);
 #define MG_ENABLE_DIRECTORY_LISTING 0
 #endif
 
+#ifndef MG_ENABLE_DNS
+#define MG_ENABLE_DNS 1
+#endif
+
 #ifndef MG_ENABLE_DNS_SERVER
 #define MG_ENABLE_DNS_SERVER 0
 #endif
@@ -1533,6 +1526,10 @@ const char *c_strnstr(const char *s, const char *find, size_t slen);
 #define MG_ENABLE_SSL 0
 #endif
 
+#ifndef MG_ENABLE_SYNC_RESOLVER
+#define MG_ENABLE_SYNC_RESOLVER 0
+#endif
+
 #ifndef MG_ENABLE_STDIO
 #define MG_ENABLE_STDIO CS_ENABLE_STDIO
 #endif
@@ -1553,11 +1550,6 @@ const char *c_strnstr(const char *s, const char *find, size_t slen);
 #define CS_ENABLE_DEBUG 1
 #endif
 
-#ifdef MG_NO_BSD_SOCKETS
-#undef MG_DISABLE_SYNC_RESOLVER
-#define MG_DISABLE_SYNC_RESOLVER 1
-#endif /* MG_NO_BSD_SOCKETS */
-
 /* MQTT broker requires MQTT */
 #if MG_ENABLE_MQTT_BROKER && !MG_ENABLE_MQTT
 #undef MG_ENABLE_MQTT
@@ -2019,6 +2011,7 @@ int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
  */
 int mg_socketpair(sock_t[2], int sock_type);
 
+#if MG_ENABLE_SYNC_RESOLVER
 /*
  * Convert domain name into IP address.
  *
@@ -2029,7 +2022,6 @@ int mg_socketpair(sock_t[2], int sock_type);
  * CAUTION: this function can block.
  * Return 1 on success, 0 on failure.
  */
-#if !MG_DISABLE_SYNC_RESOLVER
 int mg_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_len);
 #endif