Be sure we have support for MHD_USE_EPOLL.

Check if MHD_USE_EPOLL is supported at startup, to be sure we have a proper version of the library. Closes #2580
OpenSIPS · Aug 16, 2021 · bb4de46 · bb4de46
1 parent 4c3150e
commit bb4de46
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diff --git a/modules/httpd/doc/httpd_admin.xml b/modules/httpd/doc/httpd_admin.xml
@@ -48,7 +48,8 @@
 			<itemizedlist>
 			<listitem>
 			<para>
-				<emphasis>libmicrohttpd</emphasis>.
+				<emphasis>libmicrohttpd</emphasis>, with EPOLL support. This
+				typically mean a version newer than 0.9.50.
 			</para>
 			</listitem>
 			</itemizedlist>

diff --git a/modules/httpd/httpd.c b/modules/httpd/httpd.c
@@ -129,7 +129,14 @@ static int mod_init(void)
 {
 	struct ip_addr *_ip;
 
-
+	/* Get whether epoll() is supported. If supported then
+	 * Flags MHD_USE_EPOLL and MHD_USE_EPOLL_INTERNAL_THREAD can be used. */
+	if (MHD_is_feature_supported(MHD_FEATURE_EPOLL)!=MHD_YES) {
+		LM_CRIT("the version of libmicrohttpd you have does not support "
+			"EPOLL feature, you need a version newer than 0.9.50, but "
+			"running %s\n",MHD_get_version());
+		return -1;
+	}
 	if (ip.s) {
 		ip.len = strlen(ip.s);
 		if ( (_ip=str2ip(&ip)) == NULL ) {