1 files changed, 17 insertions, 7 deletions
diff --git a/apf_interpreter.h b/apf_interpreter.h
index 78a0dd3..368ae04 100644
--- a/apf_interpreter.h
+++ b/apf_interpreter.h
@@ -27,26 +27,36 @@ extern "C" {
  * Version of APF instruction set processed by accept_packet().
  * Should be returned by wifi_get_packet_filter_info.
  */
-#define APF_VERSION 3
+#define APF_VERSION 4
 
 /**
  * Runs a packet filtering program over a packet.
  *
- * @param program the program bytecode.
- * @param program_len the length of {@code apf_program} in bytes.
+ * The text section containing the program instructions starts at address
+ * program and stops at + program_len - 1, and the writable data section
+ * begins at program + program_len and ends at program + ram_len - 1,
+ * as described in the following diagram:
+ *
+ *     program         program + program_len    program + ram_len
+ *        |    text section    |      data section      |
+ *        +--------------------+------------------------+
+ *
+ * @param program the program bytecode, followed by the writable data region.
+ * @param program_len the length in bytes of the read-only portion of the APF
+ *                    buffer pointed to by {@code program}.
+ * @param ram_len total length of the APF buffer pointed to by {@code program},
+ *                including the read-only bytecode portion and the read-write
+ *                data portion.
  * @param packet the packet bytes, starting from the 802.3 header and not
  *               including any CRC bytes at the end.
  * @param packet_len the length of {@code packet} in bytes.
- * @param data writable data memory region (preserved between packets).
- * @param data_len the length of {@code data} in bytes.
  * @param filter_age the number of seconds since the filter was programmed.
  *
  * @return non-zero if packet should be passed to AP, zero if
  *         packet should be dropped.
  */
-int accept_packet(const uint8_t* program, uint32_t program_len,
+int accept_packet(uint8_t* program, uint32_t program_len, uint32_t ram_len,
                   const uint8_t* packet, uint32_t packet_len,
-                  uint8_t* data, uint32_t data_len,
                   uint32_t filter_age);
 
 #ifdef __cplusplus