diff --git a/jdwpspy/Common.h b/jdwpspy/Common.h
index ddaba9c..f942dee 100644
--- a/jdwpspy/Common.h
+++ b/jdwpspy/Common.h
@@ -6,13 +6,14 @@
 #ifndef _JDWPSPY_COMMON
 #define _JDWPSPY_COMMON
 
+#include <stdint.h>
 #include <stdio.h>
 #include <sys/types.h>
 
-typedef unsigned char u1;
-typedef unsigned short u2;
-typedef unsigned int u4;
-typedef unsigned long long u8;
+typedef uint8_t u1;
+typedef uint16_t u2;
+typedef uint32_t u4;
+typedef uint64_t u8;
 
 #define NELEM(x) (sizeof(x) / sizeof((x)[0]))
 
diff --git a/jdwpspy/Net.cpp b/jdwpspy/Net.cpp
index eea21c8..209cf28 100644
--- a/jdwpspy/Net.cpp
+++ b/jdwpspy/Net.cpp
@@ -53,7 +53,7 @@
 
     /* connect here to contact VM */
     struct in_addr vmAddr;
-    short   vmPort;
+    uint16_t vmPort;
 
     Peer    dbg;
     Peer    vm;
@@ -227,9 +227,7 @@
  *
  * Returns 0 on success.
  */
-NetState* jdwpNetStartup(unsigned short listenPort, const char* connectHost,
-    unsigned short connectPort)
-{
+NetState* jdwpNetStartup(uint16_t listenPort, const char* connectHost, uint16_t connectPort) {
     NetState* netState = new NetState;
     memset(netState, 0, sizeof(*netState));
     netState->listenSock = -1;
diff --git a/src/globals.h b/src/globals.h
index e5fead6..e5b0075 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -15,22 +15,13 @@
 const size_t KB = 1024;
 const size_t MB = KB * KB;
 const size_t GB = KB * KB * KB;
-const int kMaxInt = 0x7FFFFFFF;
-const int kMinInt = -kMaxInt - 1;
 
-const int kCharSize = sizeof(char);
-const int kShortSize = sizeof(short);
-const int kIntSize = sizeof(int);
-const int kDoubleSize = sizeof(double);
-const int kIntptrSize = sizeof(intptr_t);
 const int kWordSize = sizeof(word);
 const int kPointerSize = sizeof(void*);
 
 const int kBitsPerByte = 8;
 const int kBitsPerByteLog2 = 3;
-const int kBitsPerPointer = kPointerSize * kBitsPerByte;
 const int kBitsPerWord = kWordSize * kBitsPerByte;
-const int kBitsPerInt = kIntSize * kBitsPerByte;
 
 // Required stack alignment
 const int kStackAlignment = 16;
diff --git a/src/jdwp/jdwp.h b/src/jdwp/jdwp.h
index 03c70b0..ad3d077 100644
--- a/src/jdwp/jdwp.h
+++ b/src/jdwp/jdwp.h
@@ -95,7 +95,7 @@
   bool server;
   bool suspend;
   std::string host;
-  short port;
+  uint16_t port;
 };
 
 struct JdwpEvent;
diff --git a/src/jdwp/jdwp_socket.cc b/src/jdwp/jdwp_socket.cc
index d28c1da..d3677e8 100644
--- a/src/jdwp/jdwp_socket.cc
+++ b/src/jdwp/jdwp_socket.cc
@@ -55,12 +55,12 @@
  * We only talk to one debugger at a time.
  */
 struct JdwpNetState : public JdwpNetStateBase {
-    short   listenPort;
+    uint16_t listenPort;
     int     listenSock;         /* listen for connection from debugger */
     int     wakePipe[2];        /* break out of select */
 
     struct in_addr remoteAddr;
-    unsigned short remotePort;
+    uint16_t remotePort;
 
     bool    awaitingHandshake;  /* waiting for "JDWP-Handshake" */
 
@@ -80,18 +80,17 @@
     }
 };
 
-static JdwpNetState* netStartup(short port, bool probe);
+static JdwpNetState* netStartup(uint16_t port, bool probe);
 
 /*
  * Set up some stuff for transport=dt_socket.
  */
 static bool prepareSocket(JdwpState* state, const JdwpOptions* options) {
-  unsigned short port;
+  uint16_t port = options->port;
 
   if (options->server) {
     if (options->port != 0) {
       /* try only the specified port */
-      port = options->port;
       state->netState = netStartup(port, false);
     } else {
       /* scan through a range of ports, binding to the first available */
@@ -107,8 +106,7 @@
       return false;
     }
   } else {
-    port = options->port;   // used in a debug msg later
-    state->netState = netStartup(-1, false);
+    state->netState = netStartup(0, false);
   }
 
   if (options->suspend) {
@@ -130,8 +128,8 @@
 /*
  * Initialize JDWP stuff.
  *
- * Allocates a new state structure.  If "port" is non-negative, this also
- * tries to bind to a listen port.  If "port" is less than zero, we assume
+ * Allocates a new state structure.  If "port" is non-zero, this also
+ * tries to bind to a listen port.  If "port" is zero, we assume
  * we're preparing for an outbound connection, and return without binding
  * to anything.
  *
@@ -139,15 +137,12 @@
  *
  * Returns 0 on success.
  */
-static JdwpNetState* netStartup(short port, bool probe) {
-  int one = 1;
+static JdwpNetState* netStartup(uint16_t port, bool probe) {
   JdwpNetState* netState = new JdwpNetState;
-  if (port < 0) {
+  if (port == 0) {
     return netState;
   }
 
-  CHECK_NE(port, 0);
-
   netState->listenSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
   if (netState->listenSock < 0) {
     PLOG(probe ? ERROR : FATAL) << "Socket create failed";
@@ -155,9 +150,12 @@
   }
 
   /* allow immediate re-use */
-  if (setsockopt(netState->listenSock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
-    PLOG(probe ? ERROR : FATAL) << "setsockopt(SO_REUSEADDR) failed";
-    goto fail;
+  {
+    int one = 1;
+    if (setsockopt(netState->listenSock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
+      PLOG(probe ? ERROR : FATAL) << "setsockopt(SO_REUSEADDR) failed";
+      goto fail;
+    }
   }
 
   union {