cmake: add ENABLE_BURSTMODE option

Expose the existing experimental Packet Burst code through a CMake option.

Generate ENABLE_BURSTMODE in config.h from -DENABLE_BURSTMODE instead of
keeping it hard-coded to 0, and print the selected state during configuration.

Also fix the existing nwconn burst dispatch conditional so the source compiles
when ENABLE_BURSTMODE is enabled.

This only makes the existing Packet Burst code build-selectable; it does not
change the default behavior, which remains disabled.

CMakeLists.txt

@@ -68,6 +68,7 @@ INCLUDE(${CMAKE_MODULE_PATH}/MarsNweInstallDirs.cmake)
 option(ENABLE_DEBUG "Compile in MARS NWE debug logging code (DO_DEBUG)" OFF)
 option(ENABLE_DEBUG_BUILD "Build with debug compiler flags (-g3 -O0 -fno-omit-frame-pointer)" OFF)
 option(ENABLE_DEBUG_DOSUTILS "Enable NCP 17/02 debugging support for mars_dosutils" OFF)
+option(ENABLE_BURSTMODE "Enable experimental Packet Burst support" OFF)
 option(MAINTAINER_BUILD "Enable maintainer-only test helpers and diagnostics" OFF)
 option(ENABLE_INTERNAL_RIP_SAP "Should we build Mars Nwe with Internal Router?" ON)
 option(ENABLE_SHADOW_PWD "Should we build Mars Nwe with Shadow Password Support?" ON)
@@ -117,6 +118,12 @@ ELSE (ENABLE_DEBUG_DOSUTILS)
     SET (MARS_NWE_DEBUG_DOSUTILS "0")
 ENDIF (ENABLE_DEBUG_DOSUTILS)
 
+IF (ENABLE_BURSTMODE)
+    SET (MARS_NWE_ENABLE_BURSTMODE "1")
+ELSE (ENABLE_BURSTMODE)
+    SET (MARS_NWE_ENABLE_BURSTMODE "0")
+ENDIF (ENABLE_BURSTMODE)
+
 IF (ENABLE_INTERNAL_RIP_SAP)
     SET (MARS_NWE_INTERNAL_RIP_SAP "1")
 ELSE (ENABLE_INTERNAL_RIP_SAP)
@@ -202,6 +209,7 @@ message(STATUS "Install DOS utilities: ${MARS_NWE_INSTALL_DOSUTILS}")
 message(STATUS "Install new DOS utilities: ${MARS_NWE_INSTALL_NEW_DOSUTILS}")
 message(STATUS "Build DOS utilities: ${MARS_NWE_BUILD_DOSUTILS}")
 message(STATUS "Maintainer build: ${MAINTAINER_BUILD}")
+message(STATUS "Packet Burst support: ${ENABLE_BURSTMODE}")
 
 # put the include dirs which are in the source or build tree
 # before all other include dirs, so the headers in the sources

include/config.h.cmake

@@ -47,7 +47,7 @@
                                      /* 2 = max. IPX packets = 1470 +30 Byte (1444 Byte RWBuff) */
                                      /* 3 = max. IPX packets = 4130 +30 Byte (4096 Byte RWBuff) */
 
-#define ENABLE_BURSTMODE       0     /* 0 = disable burstmode, 1 = enable burstmode */
+#define ENABLE_BURSTMODE       @MARS_NWE_ENABLE_BURSTMODE@     /* 0 = disable burstmode, 1 = enable burstmode */
                                      /* still NOT working correct !!!!!             */
 /* to get Burstmode really enabled, section '6' in conf-file                        */
 /* must be set to a value > 1 (3.12 Server)                                         */

src/nwconn.c

@@ -3237,7 +3237,7 @@ int main(int argc, char **argv)
           handle_burst((BURSTPACKET*)readbuff, data_len);
         } else
 #endif
-        else if (ncp_type == 0x2121) { /* request from nwbind  */
+        if (ncp_type == 0x2121) { /* request from nwbind  */
           /* mst:25-Apr-00 */
           requestlen  = data_len - sizeof(NCPREQUEST);
           handle_nwbind_request();