Added call functionality to figure out the maximum number of sockets (file descriptors) available on system.

src/network/network.c

@@ -61,6 +61,21 @@ int net_initialize()
 	return -1;
 }
 
+size_t net_get_max_sockets()
+{
+#ifdef HAVE_GETRLIMIT
+	struct rlimit limits;
+	if (getrlimit(RLIMIT_NOFILE, &limits) == 0)
+	{
+		return limits.rlim_max;
+	}
+	LOG_ERROR("getrlimit() failed");
+#else
+	LOG_ERROR("System does not have getrlimit(): constrained to 1024 sockets");
+#endif /* HAVE_GETRLIMIT */
+	return 1024;
+}
+
 
 int net_destroy()
 {

src/network/network.h

@@ -87,6 +87,11 @@ extern const char* net_error_string(int code);
  */
 extern int net_socket_create(int af, int type, int protocol);
 
+/**
+ * Returns the maximum number of file/socket descriptors.
+ */
+extern size_t net_get_max_sockets();
+
 /**
  * A wrapper for the close() function call.
  */

src/uhub.h

@@ -83,8 +83,10 @@
 #ifndef WIN32
 #include <grp.h>
 #include <pwd.h>
+#include <sys/resource.h>
 #define HAVE_STRNDUP
 #define HAVE_MEMMEM
+#define HAVE_GETRLIMIT
 #endif
 
 #ifdef SSL_SUPPORT