Added functions:

* net_get_recvbuf_size
* net_set_recvbuf_size
* net_get_sendbuf_size
* net_set_sendbuf_size

Did some minor cleanups.

src/network.h

@@ -166,6 +166,38 @@ extern int net_set_linger(int fd, int toggle);
  */
 extern int net_set_reuseaddress(int fd, int toggle);
 
+/**
+ * Set the send buffer size for the socket.
+ * @param fd socket descriptor
+ * @param size size to set
+ * @return -1 on error, 0 on success.
+ */
+extern int net_set_sendbuf_size(int fd, size_t size);
+
+/**
+ * Get the send buffer size for the socket.
+ * @param fd socket descriptor
+ * @param[out] size existing size, cannot be NULL.
+ * @return -1 on error, 0 on success.
+ */
+extern int net_get_sendbuf_size(int fd, size_t* size);
+
+/**
+ * Set the receive buffer size for the socket.
+ * @param fd socket descriptor
+ * @param size size to set
+ * @return -1 on error, 0 on success.
+ */
+extern int net_set_recvbuf_size(int fd, size_t size);
+
+/**
+ * Get the receive buffer size for the socket.
+ * @param fd socket descriptor
+ * @param[out] size existing size, cannot be NULL.
+ * @return -1 on error, 0 on success.
+ */
+extern int net_get_recvbuf_size(int fd, size_t* size);
+
 /**
  * A wrapper for the recv() function call.
  */