Add OpenBSD Support (#212)

* Add OpenBSD Sourcehut Job
* Fix Code for OpenBSD

.builds/openbsd.yml

@@ -0,0 +1,25 @@
+
+image: openbsd/latest
+
+sources:
+  - https://github.com/thestr4ng3r/chiaki
+
+packages:
+  - cmake
+  - protobuf
+  - py3-protobuf
+  - opus
+  - qtbase
+  - qtsvg
+  - qtmultimedia
+  - ffmpeg
+  - sdl2
+
+tasks:
+  - build: |
+      cd chiaki
+      mkdir build && cd build
+      cmake -DCMAKE_PREFIX_PATH="/usr/local/lib;/usr/local/lib/qt5/cmake" ..
+      make -j4
+      test/chiaki-unit
+

lib/src/ecdh.c

@@ -23,6 +23,7 @@
 #include <openssl/ec.h>
 #include <openssl/hmac.h>
 #include <openssl/bn.h>
+#include <openssl/ecdh.h>
 
 #include <string.h>
 

lib/src/takion.c

@@ -249,19 +249,22 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_takion_connect(ChiakiTakion *takion, Chiaki
 
 	if(info->ip_dontfrag)
 	{
-#if __APPLE__
-		CHIAKI_LOGW(takion->log, "Don't fragment is not supported on macOS, MTU values may be incorrect.");
-#else
 #if defined(_WIN32)
 		const DWORD dontfragment_val = 1;
 		r = setsockopt(takion->sock, IPPROTO_IP, IP_DONTFRAGMENT, (const void *)&dontfragment_val, sizeof(dontfragment_val));
 #elif defined(__FreeBSD__)
 		const int dontfrag_val = 1;
 		r = setsockopt(takion->sock, IPPROTO_IP, IP_DONTFRAG, (const void *)&dontfrag_val, sizeof(dontfrag_val));
-#else
+#elif defined(IP_PMTUDISC_DO)
 		const int mtu_discover_val = IP_PMTUDISC_DO;
 		r = setsockopt(takion->sock, IPPROTO_IP, IP_MTU_DISCOVER, (const void *)&mtu_discover_val, sizeof(mtu_discover_val));
+#else
+		// macOS and OpenBSD
+		CHIAKI_LOGW(takion->log, "Don't fragment is not supported on this platform, MTU values may be incorrect.");
+#define NO_DONTFRAG
 #endif
+
+#ifndef NO_DONTFRAG
 		if(r < 0)
 		{
 			CHIAKI_LOGE(takion->log, "Takion failed to setsockopt IP_MTU_DISCOVER: %s", strerror(errno));