AP_HAL: Add missing const in member functions

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

libraries/AP_HAL/Device.h

@@ -321,7 +321,7 @@ public:
     /**
      * return bus ID with a new devtype
      */
-    uint32_t get_bus_id_devtype(uint8_t devtype) {
+    uint32_t get_bus_id_devtype(uint8_t devtype) const {
         return change_bus_id(get_bus_id(), devtype);
     }
 

libraries/AP_HAL/utility/Socket.cpp

@@ -92,7 +92,7 @@ bool SocketAPM::bind(const char *address, uint16_t port)
 /*
   set SO_REUSEADDR
  */
-bool SocketAPM::reuseaddress(void)
+bool SocketAPM::reuseaddress(void) const
 {
     int one = 1;
     return (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != -1);
@@ -101,7 +101,7 @@ bool SocketAPM::reuseaddress(void)
 /*
   set blocking state
  */
-bool SocketAPM::set_blocking(bool blocking)
+bool SocketAPM::set_blocking(bool blocking) const
 {
     int fcntl_ret;
     if (blocking) {
@@ -115,7 +115,7 @@ bool SocketAPM::set_blocking(bool blocking)
 /*
   set cloexec state
  */
-bool SocketAPM::set_cloexec()
+bool SocketAPM::set_cloexec() const
 {
     return (fcntl(fd, F_SETFD, FD_CLOEXEC) != -1);
 }
@@ -123,7 +123,7 @@ bool SocketAPM::set_cloexec()
 /*
   send some data
  */
-ssize_t SocketAPM::send(const void *buf, size_t size)
+ssize_t SocketAPM::send(const void *buf, size_t size) const
 {
     return ::send(fd, buf, size, 0);
 }
@@ -153,13 +153,13 @@ ssize_t SocketAPM::recv(void *buf, size_t size, uint32_t timeout_ms)
 /*
   return the IP address and port of the last received packet
  */
-void SocketAPM::last_recv_address(const char *&ip_addr, uint16_t &port)
+void SocketAPM::last_recv_address(const char *&ip_addr, uint16_t &port) const
 {
     ip_addr = inet_ntoa(in_addr.sin_addr);
     port = ntohs(in_addr.sin_port);
 }
 
-void SocketAPM::set_broadcast(void)
+void SocketAPM::set_broadcast(void) const
 {
     int one = 1;
     setsockopt(fd,SOL_SOCKET,SO_BROADCAST,(char *)&one,sizeof(one));
@@ -209,7 +209,7 @@ bool SocketAPM::pollout(uint32_t timeout_ms)
 /* 
    start listening for new tcp connections
  */
-bool SocketAPM::listen(uint16_t backlog)
+bool SocketAPM::listen(uint16_t backlog) const
 {
     return ::listen(fd, (int)backlog) == 0;
 }

libraries/AP_HAL/utility/Socket.h

@@ -37,17 +37,17 @@ public:
 
     bool connect(const char *address, uint16_t port);
     bool bind(const char *address, uint16_t port);
-    bool reuseaddress();
-    bool set_blocking(bool blocking);
-    bool set_cloexec();
-    void set_broadcast(void);
+    bool reuseaddress() const;
+    bool set_blocking(bool blocking) const;
+    bool set_cloexec() const;
+    void set_broadcast(void) const;
 
-    ssize_t send(const void *pkt, size_t size);
+    ssize_t send(const void *pkt, size_t size) const;
     ssize_t sendto(const void *buf, size_t size, const char *address, uint16_t port);
     ssize_t recv(void *pkt, size_t size, uint32_t timeout_ms);
 
     // return the IP address and port of the last received packet
-    void last_recv_address(const char *&ip_addr, uint16_t &port);
+    void last_recv_address(const char *&ip_addr, uint16_t &port) const;
 
     // return true if there is pending data for input
     bool pollin(uint32_t timeout_ms);
@@ -56,7 +56,7 @@ public:
     bool pollout(uint32_t timeout_ms);
 
     // start listening for new tcp connections
-    bool listen(uint16_t backlog);
+    bool listen(uint16_t backlog) const;
 
     // accept a new connection. Only valid for TCP connections after
     // listen has been used. A new socket is returned