net: Inet IP getters are now const

Author: AndreasAakesson

api/net/inet.hpp

@@ -54,19 +54,19 @@ namespace net {
     ///
 
     /** Get IP address of this interface **/
-    virtual typename IPV::addr ip_addr()        = 0;
+    virtual typename IPV::addr ip_addr() const = 0;
 
     /** Get netmask of this interface **/
-    virtual typename IPV::addr netmask()        = 0;
+    virtual typename IPV::addr netmask() const = 0;
 
     /** Get default gateway for this interface **/
-    virtual typename IPV::addr gateway()        = 0;
+    virtual typename IPV::addr gateway() const = 0;
 
     /** Get default dns for this interface **/
-    virtual typename IPV::addr dns_addr()       = 0;
+    virtual typename IPV::addr dns_addr() const = 0;
 
     /** Get broadcast address for this interface **/
-    virtual typename IPV::addr broadcast_addr() = 0;
+    virtual typename IPV::addr broadcast_addr() const = 0;
 
    /** Set default gateway for this interface */
     virtual void set_gateway(typename IPV::addr server) = 0;
@@ -216,7 +216,7 @@ namespace net {
     virtual std::string ifname() const = 0;
 
     /** Get linklayer address for this interface **/
-    virtual MAC::Addr link_addr() = 0;
+    virtual MAC::Addr link_addr() const = 0;
 
     /** Add cache entry to the link / IP address cache */
     virtual void cache_link_addr(typename IPV::addr, MAC::Addr) = 0;

api/net/inet4.hpp

@@ -43,25 +43,25 @@ namespace net {
     std::string ifname() const override
     { return nic_.device_name(); }
 
-    MAC::Addr link_addr() override
+    MAC::Addr link_addr() const override
     { return nic_.mac(); }
 
     hw::Nic& nic() override
     { return nic_; }
 
-    IP4::addr ip_addr() override
+    IP4::addr ip_addr() const override
     { return ip4_addr_; }
 
-    IP4::addr netmask() override
+    IP4::addr netmask() const override
     { return netmask_; }
 
-    IP4::addr gateway() override
+    IP4::addr gateway() const override
     { return gateway_; }
 
-    IP4::addr dns_addr() override
+    IP4::addr dns_addr() const override
     { return dns_server_; }
 
-    IP4::addr broadcast_addr() override
+    IP4::addr broadcast_addr() const override
     { return ip4_addr_ | ( ~ netmask_); }
 
     IP4& ip_obj() override