4 // Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
5 // Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
6 // Stefan Bund <stefan.bund@fokus.fraunhofer.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief ClientSocketHandle public header
27 #ifndef HH_ClientSocketHandle_
28 #define HH_ClientSocketHandle_ 1
31 #include <boost/call_traits.hpp>
32 #include <boost/range.hpp>
33 #include "SocketHandle.hh"
35 //#include "ClientSocketHandle.mpp"
36 ///////////////////////////////hh.p////////////////////////////////////////
40 /// \addtogroup handle_group
43 template <class Policy> class ServerSocketHandle;
45 /** \brief Generic SocketHandle with client interface
47 This class provides the client side policy interface of the socket
48 abstraction. ClientSocketHandle defines the complete policy interface. It does not implement
49 any functionality itself however. All calls are forward to the following policy classes:
52 <tr><th>ClientSocketHandle member</th> <th>Policy member</th></tr>
53 <tr><td>read()</td> <td>ReadPolicy::read (\ref senf::ReadPolicyBase)</td></tr>
54 <tr><td>readfrom()</td> <td>ReadPolicy::readfrom (\ref senf::ReadPolicyBase)</td></tr>
55 <tr><td>write()</td> <td>WritePolicy::write (\ref senf::WritePolicyBase)</td></tr>
56 <tr><td>writeto()</td> <td>WritePolicy::writeto (\ref senf::WritePolicyBase)</td></tr>
57 <tr><td>connect()</td> <td>AddressingPolicy::connect (\ref senf::AddressingPolicyBase)</td></tr>
58 <tr><td>bind()</td> <td>AddressingPolicy::bind (\ref senf::AddressingPolicyBase)</td></tr>
59 <tr><td>peer()</td> <td>AddressingPolicy::peer (\ref senf::AddressingPolicyBase)</td></tr>
60 <tr><td>local()</td> <td>AddressingPolicy::local (\ref senf::AddressingPolicyBase)</td></tr>
61 <tr><td>rcvbuf()</td> <td>BufferingPolicy::sndbuf (\ref senf::BufferingPolicyBase)</td></tr>
62 <tr><td>sndbuf()</td> <td>BufferingPolicy::rcvbuf (\ref senf::BufferingPolicyBase)</td></tr>
65 It is important to note, that not all members are always accessible. Which are depends on
66 the \c Policy template argument. If any of the policy axis is left unspecified the
67 corresponding members will not be callable (you will get a compile time error). Even if
68 every policy axis is defined, some members might (and will) not exist if they are
69 meaningless for the protocol of the socket. This depends on the exact policy.
71 To find out, which members are available, you have to check the documentation of the policy
72 classes. You can also find a summary of all members available in the leaf protocol class
75 \todo Move all not template-parameter dependent code into a non-template base class
77 \idea Give SocketHandle (and therefore ClientSocketHandle and ServerSocketHandle) a \c
78 protocol() template member and an additional template arg \c Policies. This arg should be a
79 typelist of Poclicy classes which can be accessed. You use protocol<ProtocolClass>() to
80 access a protocol class. \c Policies can of course be underspecified or even empty.
82 \idea add more flexible read/write members for a) boost::arrays and arrays of other types b)
83 std::vector (which uses contiguous memory ..) c) other random-access containers (we should
84 use some configurable trait class to identify containers with contiguous storage). Probably
85 we should just use a generic Boost.Range interface. Here we again come to the point: make
86 all except the most basic members be non-member algorithms ? this would make the
87 configuration of such extenden members more flexible.
89 \see \ref policy_group \n
92 template <class Policy>
93 class ClientSocketHandle
94 : public SocketHandle<Policy>
97 ///////////////////////////////////////////////////////////////////////////
100 /// Address type from the addressing policy
101 typedef typename Policy::AddressingPolicy::Address Address;
102 /// 'Best' type for passing address as parameter
103 /** Depending on the type of \c Address, this will be either <tt>Address</tt> or <tt>Address
105 href="http://www.boost.org/libs/utility/call_traits.htm">call_traits documentation in
106 the Boost.Utility library.</a>
108 typedef typename boost::call_traits<Address>::param_type AddressParam;
109 /// Corresponding server socket handle with the same policy
110 /** This class will probably only be usable, if the \c CommunicationPolicy is \c
111 ConnectedCommunicationPolicy and the \c AddressingPolicy is not \c
112 NoAddressingPolicy. */
113 typedef ServerSocketHandle<Policy> ServerSocketHandle;
115 ///////////////////////////////////////////////////////////////////////////
116 ///\name Structors and default members
119 // no default constructor
120 // default copy constructor
121 // default copy assignment
122 // default destructor
124 // conversion constructors
125 template <class OtherPolicy>
126 ClientSocketHandle(ClientSocketHandle<OtherPolicy> other,
127 typename SocketHandle<Policy>::template IsCompatible<OtherPolicy>::type * = 0);
129 template <class OtherPolicy>
130 typename SocketHandle<Policy>::template IsCompatible<OtherPolicy>::type const &
131 operator=(ClientSocketHandle<OtherPolicy> other);
134 ///////////////////////////////////////////////////////////////////////////
136 ///////////////////////////////////////////////////////////////////////////
137 ///\name Reading and Writing
140 /** \brief Read data from socket
142 If the sockets \c FramingPolicy is \c DatagramFramingPolicy, every read() command will
143 return a single datagram. If the sockets FramingPolicy is StreamFraming, the operation
144 will return as much data as possible from the socket buffer. However it cannot be
145 guaranteed, that the socket buffer will be empty after read() returns.
147 \attention If the space available for the data read is limited, the read will return no
148 more than that amount of data. For a datagram socket, a full datagram is still dequeued
149 from the socket buffer, the remainder of the datagram will be lost.
151 There are several variants of read which differ in how they return the read string.
153 If the further document doesn't tell something differently, on a blocking socket the
154 members will \e always return some data (as long as the socket has not been closed at
155 the other end) and will block, if no data is available now. If you do not want to block,
156 you \e must make the socket non-blocking (using FileHandle::blocking()).
158 \throws senf::SystemException
161 This variant will read up to \c limit bytes from the
162 socket and return them as a \c std::string object.
164 \param[in] limit Maximum number of bytes to read or 0 if unlimited.
167 \implementation The read() family of members will use standard POSIX \c read calls, not
170 std::string read (unsigned limit=0);
171 template <class ForwardWritableRange>
172 typename boost::range_iterator<ForwardWritableRange>::type
173 read (ForwardWritableRange const & range);
174 ///< Read data into range
175 /**< Read data into the given range. At most
176 <tt>boost::size(range)</tt> characters are read. The
177 data read will start at the beginning of the
178 range. read returns a past-the-end iterator after the
179 last character read. This iterator will point to
180 somewhere within the input range.
181 \param[in/out] range Range to store data in
182 \returns past-the-end iterator pointer to after the
185 template <class ForwardWritableRange>
186 typename boost::range_iterator<ForwardWritableRange>::type
187 read (ForwardWritableRange & range);
188 ///< Read data into range
190 read(ForwardWritableRange const &) \n
192 template <class Sequence>
193 void read (Sequence & container, unsigned limit);
194 ///< Read data into container
195 /**< The data read is written into the given container. Old
196 data in the container will be removed. For this to
197 work, the container must be a model of 'Sequence' as
198 defined in the STL documentation
199 \param[out] container Container to write data to
200 \param[in] limit Maximum number of characters to read
202 char * read (char * start, char * end);
203 ///< Read data into memory area
204 /**< This variant will read data into the memory area from
205 \a start to before \a end. This is guaranteed to be the
206 most efficient version of read().
207 \param[in] start address of buffer to store data at
208 \param[in] end address one past the end of the buffer
209 \returns pointer past the end of the data read
212 /** \brief Read data from unconnected socket returning address
214 The readfrom() group of member behaves like \ref read() but should only be available, if
215 the sockets \c CommunicationPolicy is \c UnconnectedCommunicationPolicy and the \c
216 AddressingPolicy is not \c NoAddressingPolicy. readfrom() will in addition to the data
217 return the address of the sender.
219 \throws senf::SystemException
222 This variant will return the data read and the address as a std::pair.
224 \returns \c std::pair of data read (a string) and the peers address
226 \implementation The readfrom() family of members will use \c recvfrom from the BSD
229 std::pair<std::string, Address>
230 readfrom (unsigned limit=0);
231 template <class ForwardWritableRange>
232 typename boost::range_iterator<ForwardWritableRange const>::type
233 readfrom (ForwardWritableRange const & range, Address & from);
234 ///< Read data into range
235 /**< Read data into the given range. At most
236 <tt>boost::size(range)</tt> characters are read. The
237 data read will start at the beginning of the
238 range. read returns a past-the-end iterator after the
239 last character read. This iterator will point to
240 somewhere within the input range.
241 \param[in/out] range Range to store data in
242 \param[out] from peers address from which the data was
244 \returns past-the-end iterator pointer to after the
246 \see \ref readfrom() */
247 template <class ForwardWritableRange>
248 typename boost::range_iterator<ForwardWritableRange>::type
249 readfrom (ForwardWritableRange & range, Address & from);
250 ///< Read data into range
252 readfrom(ForwardWritableRange const&,Address&) \n
254 template <class Sequence>
255 void readfrom (Sequence & container, Address & from, unsigned limit);
256 ///< Read data into container
257 /**< The data read is written into the given container. Old
258 data in the container will be removed. For this to
259 work, the container must be a model of 'Sequence' as
260 defined in the STL documentation
261 \param[out] container Container to write data to
262 \param[in] limit Maximum number of characters to read
263 \param[out] from peers address from which the data was
265 \see \ref readfrom() */
266 char * readfrom (char * start, char * end, Address & from);
267 ///< Read data into memory buffer
268 /**< This variant will read data into the memory area at \c
269 buffer of size \c size. This is the most performant
270 version of readfrom().
271 \param[in] buffer address of buffer to store data at
272 \param[in] size size of buffer
273 \param[out] from peer address
274 \returns Number of bytes read
275 \see \ref readfrom() */
278 /** \brief Write data to socket
280 The write() family of members will write out the data to the socket. If the sockets \c
281 FramingPolicy is \c DatagramFramingPolicy, every write() call will result in one
284 A single write call might depending on the circumstances write only part of the data.
286 There are two variants of this member
288 \throws senf::SystemException
291 This variant will write out the range \c data.
293 \param[in] range Data to write
294 \returns past-the-end iterator after last element written
295 \implementation The write() family of members will use POSIX \c write calls, not \c
298 template <class ForwardReadableRange>
299 typename boost::range_const_iterator<ForwardReadableRange const>::type
300 write (ForwardReadableRange const & range);
301 char const * write (char const * start, char const * end);
302 ///< Write data to socket from memory buffer
303 /**< \param[in] start beginning of area to write
304 \param[in] end past-the-end pointer to area to write
305 \returns past-the-end pointer after last byte written
308 /** \brief Write data to unconnected socket
310 This member behaves like write() but should only be available, if the sockets \c
311 CommunicationPolicy is \c UnconnectedCommunicationPolicy and the \c AddressingPolicy is
312 not \c NoAddressingPolicy. The writeto() family of members takes the target address as
313 an additional argument.
315 There are two variants of this member.
317 \throw senf::SystemException
320 This variant will send the range \c range to peer \c addr.
322 \param[in] addr Address of peer to send data to
323 \param[in] range data to send
324 \returns Number of bytes written
326 template <class ForwardReadableRange>
327 typename boost::range_const_iterator<ForwardReadableRange const>::type
328 writeto (AddressParam addr, ForwardReadableRange const & range);
329 char const * writeto (AddressParam addr, char const * start, char const * end);
330 ///< Write data from memory buffer to unconnected socket
331 /**< \param[in] addr Address of peer to send data to
332 \param[in] start address of buffer to write
333 \param[in] end past-the-end pointer after data to write
334 \returns past-the-end iterator after last byte written
335 \see \ref writeto() */
337 ///////////////////////////////////////////////////////////////////////////
341 /** \brief Connect to remote peer
343 This member will establish a connection for addressable connection-oriented protocols
344 (that is, the CommunicationPolicy is ConnectedCommunicationPolicy and the
345 AddressingPolicy is not NoAddressingPolicy).
347 \param[in] addr Address to connect to
349 \throws senf::SystemException
351 void connect (AddressParam addr);
353 /** \brief Set local address
355 For addressable protocols (AddressingPolicy is not NoAddressingPolicy), bind() will set
356 the local address of the socket.
358 \param[in] addr Local socket address to asign
360 \throws senf::SystemException
362 void bind (AddressParam addr);
364 /** \brief Query remote address
366 This member will return the address of the communication partner in addressable
367 connection-oriented protocols (that is, the CommunicationPolicy is
368 ConnectedCommunicationPolicy and the AddressingPolicy is not NoAddressingPolicy).
370 There are two Variants of this member, one will return the address by value, the other
371 takes a reference argument to elide the copy operation.
373 \throws senf::SystemException
376 void peer (Address & addr);
377 ///< Query remote address
378 /**< \see \ref peer() */
380 /** \brief Query local address
382 This member will return the address of the local socket in addressable protocols
383 (AddressingPolicy is not NoAddressingPolicy).
385 There are two Variants of this member, one will return the address by value, the other
386 takes a reference argument to elide the copy operation.
388 \throws senf::SystemException
391 void local (Address & addr);
392 ///< Query local address
393 /**< \see \ref local() */
397 ///////////////////////////////////////////////////////////////////////////
401 unsigned rcvbuf (); ///< Check size of receive buffer
402 /**< \returns size of receive buffer in bytes */
403 void rcvbuf (unsigned size);
404 ///< Set size of receive buffer
405 /**< \param[in] size size of receive buffer in bytes */
407 unsigned sndbuf (); ///< Check size of send buffer
408 /**< \returns size of send buffer in bytes */
409 void sndbuf (unsigned size);
410 ///< Set size of send buffer
411 /**< \param[in] size size of send buffer in bytes */
415 static ClientSocketHandle cast_static(FileHandle handle);
416 static ClientSocketHandle cast_dynamic(FileHandle handle);
418 // we need to override both since SocketHandle is *not* polymorphic
419 void state(SocketStateMap & map, unsigned lod=0);
420 std::string dumpState(unsigned lod=0);
423 ClientSocketHandle(FileHandle other, bool isChecked);
424 explicit ClientSocketHandle(std::auto_ptr<SocketProtocol> protocol,
428 unsigned available();
430 friend class senf::ServerSocketHandle<Policy>;
436 ///////////////////////////////hh.e////////////////////////////////////////
437 //#include "ClientSocketHandle.cci"
438 #include "ClientSocketHandle.ct"
439 #include "ClientSocketHandle.cti"
446 // c-file-style: "senf"
447 // indent-tabs-mode: nil
448 // ispell-local-dictionary: "american"