Define lwIP's s32/u32 to int (esp8266#8560)

* Define lwIP's s32/u32 to int

s32/u32 were previously defined as long,
but long can be 64 bits in host mode,
so this commit reduces valgrind complaints and increase coherency.

* some lads like to use `unsigned long` for 32 bits IPv4 addresses

* fix lwIP's `sys_now()` return type

* fix C declarations

* merge upstream (lwip2) update on sys_now() definition

* matching lwIP api (2/2)

Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>

cores/esp8266/IPAddress.h

@@ -69,7 +69,7 @@ class IPAddress: public Printable {
         IPAddress(const IPAddress& from);
         IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet);
         IPAddress(uint32_t address) { ctor32(address); }
-        IPAddress(u32_t address) { ctor32(address); }
+        IPAddress(unsigned long address) { ctor32(address); }
         IPAddress(int address) { ctor32(address); }
         IPAddress(const uint8_t *address);
 
@@ -80,16 +80,14 @@ class IPAddress: public Printable {
         // to a four-byte uint8_t array is expected
         operator uint32_t() const { return isV4()? v4(): (uint32_t)0; }
         operator uint32_t()       { return isV4()? v4(): (uint32_t)0; }
-        operator u32_t()    const { return isV4()? v4():    (u32_t)0; }
-        operator u32_t()          { return isV4()? v4():    (u32_t)0; }
 
         bool isSet () const;
         operator bool () const { return isSet(); } // <-
         operator bool ()       { return isSet(); } // <- both are needed
 
         // generic IPv4 wrapper to uint32-view like arduino loves to see it
-        const u32_t& v4() const { return ip_2_ip4(&_ip)->addr; } // for raw_address(const)
-              u32_t& v4()       { return ip_2_ip4(&_ip)->addr; }
+        const uint32_t& v4() const { return ip_2_ip4(&_ip)->addr; } // for raw_address(const)
+              uint32_t& v4()       { return ip_2_ip4(&_ip)->addr; }
 
         bool operator==(const IPAddress& addr) const {
             return ip_addr_cmp(&_ip, &addr._ip);
@@ -100,14 +98,14 @@ class IPAddress: public Printable {
         bool operator==(uint32_t addr) const {
             return isV4() && v4() == addr;
         }
-        bool operator==(u32_t addr) const {
-            return isV4() && v4() == addr;
+        bool operator==(unsigned long addr) const {
+            return isV4() && v4() == (uint32_t)addr;
         }
         bool operator!=(uint32_t addr) const {
             return !(isV4() && v4() == addr);
         }
-        bool operator!=(u32_t addr) const {
-            return !(isV4() && v4() == addr);
+        bool operator!=(unsigned long addr) const {
+            return isV4() && v4() != (uint32_t)addr;
         }
         bool operator==(const uint8_t* addr) const;
 

libraries/ESP8266WiFi/src/WiFiServer.cpp

@@ -186,7 +186,7 @@ T* slist_append_tail(T* head, T* item) {
     return head;
 }
 
-long WiFiServer::_accept(tcp_pcb* apcb, long err) {
+err_t WiFiServer::_accept(tcp_pcb* apcb, err_t err) {
     (void) err;
     DEBUGV("WS:ac\r\n");
 
@@ -212,7 +212,7 @@ void WiFiServer::_discard(ClientContext* client) {
     DEBUGV("WS:dis\r\n");
 }
 
-long WiFiServer::_s_accept(void *arg, tcp_pcb* newpcb, long err) {
+err_t WiFiServer::_s_accept(void *arg, tcp_pcb* newpcb, err_t err) {
     return reinterpret_cast<WiFiServer*>(arg)->_accept(newpcb, err);
 }
 

libraries/ESP8266WiFi/src/WiFiServer.h

@@ -23,13 +23,14 @@
 #define wifiserver_h
 
 extern "C" {
-  #include "wl_definitions.h"
+  #include <wl_definitions.h>
 
   struct tcp_pcb;
 }
 
-#include "Server.h"
-#include "IPAddress.h"
+#include <Server.h>
+#include <IPAddress.h>
+#include <lwip/err.h>
 
 // lwIP-v2 backlog facility allows to keep memory safe by limiting the
 // maximum number of incoming *pending clients*.  Default number of possibly
@@ -103,10 +104,10 @@ class WiFiServer {
   using ClientType = WiFiClient;
 
 protected:
-  long _accept(tcp_pcb* newpcb, long err);
+  err_t  _accept(tcp_pcb* newpcb, err_t err);
   void   _discard(ClientContext* client);
 
-  static long _s_accept(void *arg, tcp_pcb* newpcb, long err);
+  static err_t _s_accept(void *arg, tcp_pcb* newpcb, err_t err);
   static void _s_discard(void* server, ClientContext* ctx);
 };
 

tests/host/common/user_interface.cpp

@@ -182,7 +182,7 @@ extern "C"
             {
                 auto test_ipv4
                     = lwip_ntohl(*(uint32_t*)&((struct sockaddr_in*)ifa->ifa_addr)->sin_addr);
-                mockverbose(" IPV4 (0x%08lx)", test_ipv4);
+                mockverbose(" IPV4 (0x%08x)", test_ipv4);
                 if ((test_ipv4 & 0xff000000) == 0x7f000000)
                     // 127./8
                     mockverbose(" (local, ignored)");

tools/sdk/lwip2/include/arch/cc.h

@@ -85,7 +85,21 @@ typedef uint32_t sys_prot_t;
 ///////////////////////////////
 //// MISSING 
 
-#define sys_now millis		// arduino wire millis() definition returns 32 bits like sys_now() does
+// Arduino Core exposes time func with a generic type
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+unsigned long millis(void);
+#ifdef __cplusplus
+}
+#endif
+
+// b/c we have conflicting typedefs of u32_t and ulong and can't substitute funcs,
+// forcibly cast the `millis()` result to lwip's version of u32_t
+// (previous version was `#define sys_now millis`)
+#define sys_now() ((u32_t)millis())
+
 #define LWIP_RAND r_rand	// old lwip uses this useful undocumented function
 #define IPSTR "%d.%d.%d.%d"
 #define IP2STR(ipaddr) ip4_addr1_16(ipaddr), \

tools/sdk/lwip2/include/lwip-err-t.h

@@ -4,8 +4,8 @@ typedef unsigned   char    u8_t;
 typedef signed     char    s8_t;
 typedef unsigned   short   u16_t;
 typedef signed     short   s16_t;
-typedef unsigned   long    u32_t;
-typedef signed     long    s32_t;
+typedef unsigned   int     u32_t;
+typedef signed     int     s32_t;
 typedef unsigned long   mem_ptr_t;
 #define LWIP_ERR_T s32_t
 typedef uint32_t sys_prot_t;

tools/sdk/lwip2/include/lwip-git-hash.h

@@ -1,5 +1,5 @@
 // generated by makefiles/make-lwip2-hash
 #ifndef LWIP_HASH_H
 #define LWIP_HASH_H
-#define LWIP_HASH_STR "STABLE-2_1_3_RELEASE/glue:1.2-58-g450bb63"
+#define LWIP_HASH_STR "STABLE-2_1_3_RELEASE/glue:1.2-61-g679577b"
 #endif // LWIP_HASH_H

tools/sdk/lwip2/include/lwip/sys.h

@@ -443,7 +443,7 @@ u32_t sys_jiffies(void);
  * Not implementing this function means you cannot use some modules (e.g. TCP
  * timestamps, internal timeouts for NO_SYS==1).
  */
-u32_t sys_now(void);
+//u32_t sys_now(void);
 
 /* Critical Region Protection */
 /* These functions must be implemented in the sys_arch.c file.