Add BSD support (OpenBSD, FreeBSD)

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(netcode VERSION 1.3.4 LANGUAGES C CXX)
+project(netcode VERSION 1.3.5 LANGUAGES C CXX)
 
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)

netcode.c

@@ -680,20 +680,43 @@ int netcode_socket_create( struct netcode_socket_t * s, struct netcode_address_t
         }
     }
 
-    // increase socket send and receive buffer sizes
+    // increase socket send and receive buffer sizes. linux and windows clamp requests that
+    // exceed the OS limit, but the BSDs reject them instead, so back off until accepted.
 
-    if ( setsockopt( s->handle, SOL_SOCKET, SO_SNDBUF, (char*)&send_buffer_size, sizeof(int) ) != 0 )
     {
-        netcode_printf( NETCODE_LOG_LEVEL_ERROR, "error: failed to set socket send buffer size\n" );
-        netcode_socket_destroy( s );
-        return NETCODE_SOCKET_ERROR_SOCKOPT_SNDBUF_FAILED;
+        int size = send_buffer_size;
+        while ( setsockopt( s->handle, SOL_SOCKET, SO_SNDBUF, (char*)&size, sizeof(int) ) != 0 )
+        {
+            size /= 2;
+            if ( size < 256 * 1024 )
+            {
+                netcode_printf( NETCODE_LOG_LEVEL_ERROR, "error: failed to set socket send buffer size\n" );
+                netcode_socket_destroy( s );
+                return NETCODE_SOCKET_ERROR_SOCKOPT_SNDBUF_FAILED;
+            }
+        }
+        if ( size != send_buffer_size )
+        {
+            netcode_printf( NETCODE_LOG_LEVEL_INFO, "socket send buffer size reduced from %d to %d\n", send_buffer_size, size );
+        }
     }
 
-    if ( setsockopt( s->handle, SOL_SOCKET, SO_RCVBUF, (char*)&receive_buffer_size, sizeof(int) ) != 0 )
     {
-        netcode_printf( NETCODE_LOG_LEVEL_ERROR, "error: failed to set socket receive buffer size\n" );
-        netcode_socket_destroy( s );
-        return NETCODE_SOCKET_ERROR_SOCKOPT_RCVBUF_FAILED;
+        int size = receive_buffer_size;
+        while ( setsockopt( s->handle, SOL_SOCKET, SO_RCVBUF, (char*)&size, sizeof(int) ) != 0 )
+        {
+            size /= 2;
+            if ( size < 256 * 1024 )
+            {
+                netcode_printf( NETCODE_LOG_LEVEL_ERROR, "error: failed to set socket receive buffer size\n" );
+                netcode_socket_destroy( s );
+                return NETCODE_SOCKET_ERROR_SOCKOPT_RCVBUF_FAILED;
+            }
+        }
+        if ( size != receive_buffer_size )
+        {
+            netcode_printf( NETCODE_LOG_LEVEL_INFO, "socket receive buffer size reduced from %d to %d\n", receive_buffer_size, size );
+        }
     }
 
     // bind to port
@@ -5325,7 +5348,7 @@ int netcode_generate_connect_token( int num_server_addresses,
 
 // ---------------------------------------------------------------
 
-#if __APPLE__
+#if NETCODE_PLATFORM == NETCODE_PLATFORM_MAC
 
 // MacOS
 
@@ -5356,12 +5379,20 @@ double netcode_time()
     return ( (double) ( current - start ) ) * ( (double) timebase_info.numer ) / ( (double) timebase_info.denom ) / 1000000000.0;
 }
 
-#elif __linux
+#elif NETCODE_PLATFORM == NETCODE_PLATFORM_UNIX
 
-// linux
+// linux and other unix systems (openbsd, freebsd etc.)
 
 #include <unistd.h>
 
+// linux has CLOCK_MONOTONIC_RAW, but other unix systems only have CLOCK_MONOTONIC
+
+#ifdef CLOCK_MONOTONIC_RAW
+#define NETCODE_MONOTONIC_CLOCK CLOCK_MONOTONIC_RAW
+#else
+#define NETCODE_MONOTONIC_CLOCK CLOCK_MONOTONIC
+#endif
+
 void netcode_sleep( double time )
 {
     struct timespec ts;
@@ -5376,17 +5407,17 @@ double netcode_time()
     if ( start == -1 )
     {
         struct timespec ts;
-        clock_gettime( CLOCK_MONOTONIC_RAW, &ts );
+        clock_gettime( NETCODE_MONOTONIC_CLOCK, &ts );
         start = ts.tv_sec + ( (double) ( ts.tv_nsec ) ) / 1000000000.0;
         return 0.0;
     }
     struct timespec ts;
-    clock_gettime( CLOCK_MONOTONIC_RAW, &ts );
+    clock_gettime( NETCODE_MONOTONIC_CLOCK, &ts );
     double current = ts.tv_sec + ( (double) ( ts.tv_nsec ) ) / 1000000000.0;
     return current - start;
 }
 
-#elif defined( _WIN32 )
+#elif NETCODE_PLATFORM == NETCODE_PLATFORM_WINDOWS
 
 // windows
 

netcode.h

@@ -25,10 +25,10 @@
 #ifndef NETCODE_H
 #define NETCODE_H
 
-#define NETCODE_VERSION_FULL    "1.3.4"
+#define NETCODE_VERSION_FULL    "1.3.5"
 #define NETCODE_VERSION_MAJOR   1
 #define NETCODE_VERSION_MINOR   3
-#define NETCODE_VERSION_PATCH   4
+#define NETCODE_VERSION_PATCH   5
 
 /*
     IMPORTANT: netcode is single-threaded by design and is not thread safe.