net: socket: Change socklen_t to be 4 bytes long

doc/releases/migration-guide-4.3.rst

@@ -186,6 +186,11 @@ Networking
   :c:macro:`HTTPS_SERVICE_DEFINE_EMPTY`, :c:macro:`HTTP_SERVICE_DEFINE` and
   :c:macro:`HTTPS_SERVICE_DEFINE`.
 
+* The size of socket address length type :c:type:`socklen_t` has changed. It is now defined to
+  be always 32 bit ``uint32_t`` in order to be aligned with Linux. Previously it was defined as
+  ``size_t`` which meant that the size could be either 32 bit or 64 bit depending on system
+  configuration.
+
 .. zephyr-keep-sorted-start re(^\w)
 
 .. zephyr-keep-sorted-stop

include/zephyr/net/net_context.h

@@ -1419,7 +1419,7 @@ enum net_context_option {
  */
 int net_context_set_option(struct net_context *context,
 			   enum net_context_option option,
-			   const void *value, size_t len);
+			   const void *value, uint32_t len);
 
 /**
  * @brief Get connection option value for this context.
@@ -1433,7 +1433,7 @@ int net_context_set_option(struct net_context *context,
  */
 int net_context_get_option(struct net_context *context,
 			   enum net_context_option option,
-			   void *value, size_t *len);
+			   void *value, uint32_t *len);
 
 /**
  * @typedef net_context_cb_t

include/zephyr/net/net_ip.h

@@ -169,7 +169,7 @@ typedef unsigned short int sa_family_t;
 
 /** Length of a socket address */
 #ifndef __socklen_t_defined
-typedef size_t socklen_t;
+typedef uint32_t socklen_t;
 #define __socklen_t_defined
 #endif