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1 | /*************************************************************************** |
2 | * Copyright (C) 2006 by Gerd v. Egidy * | |
3 | * gve@intra2net.com * | |
4 | * * | |
5 | * This library is free software; you can redistribute it and/or modify * | |
6 | * it under the terms of the GNU Lesser General Public License version * | |
7 | * 2.1 as published by the Free Software Foundation. * | |
8 | * * | |
9 | * This library is distributed in the hope that it will be useful, * | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
12 | * GNU Lesser General Public License for more details. * | |
13 | * * | |
14 | * You should have received a copy of the GNU Lesser General Public * | |
15 | * License along with this program; if not, write to the * | |
16 | * Free Software Foundation, Inc., * | |
17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * | |
18 | ***************************************************************************/ | |
19 | #ifndef __LIBT2N_CONNECTION | |
20 | #define __LIBT2N_CONNECTION | |
21 | ||
22 | #include <string> | |
a64066eb GE |
23 | #include <vector> |
24 | #include <list> | |
25 | #include <iostream> | |
26 | ||
27 | #include <boost/function.hpp> | |
a11e19b7 | 28 | |
8104c8f7 | 29 | #include <netinet/in.h> |
a7170401 | 30 | |
8104c8f7 | 31 | #include "types.hxx" |
a7170401 | 32 | |
a11e19b7 GE |
33 | namespace libt2n |
34 | { | |
35 | ||
94247295 GE |
36 | /** @brief a connection between client and server. abstact. |
37 | */ | |
a11e19b7 GE |
38 | class connection |
39 | { | |
40 | private: | |
41 | bool closed; | |
42 | ||
a64066eb GE |
43 | /// vector initialized for all callback-types, all elements in each list will be called |
44 | std::vector<std::list<boost::function<void ()> > > callbacks; | |
45 | ||
a11e19b7 GE |
46 | protected: |
47 | connection() | |
a64066eb GE |
48 | : callbacks(__events_end), closed(false) |
49 | { } | |
a11e19b7 GE |
50 | |
51 | std::string buffer; | |
52 | ||
8104c8f7 | 53 | typedef uint32_t packet_size_indicator; |
a11e19b7 GE |
54 | |
55 | packet_size_indicator bytes_available(); | |
56 | ||
57 | virtual void real_write(const std::string& data)=0; | |
58 | ||
a7170401 GE |
59 | virtual std::ostream* get_logstream(log_level_values level)=0; |
60 | ||
a64066eb GE |
61 | void do_callbacks(callback_event_type event); |
62 | ||
af84dfb5 GE |
63 | void reopen(void); |
64 | void remove_incomplete_packets(); | |
65 | ||
a11e19b7 | 66 | public: |
a64066eb | 67 | virtual ~connection(); |
a11e19b7 | 68 | |
94247295 | 69 | /// is this connection closed or not |
a11e19b7 GE |
70 | bool is_closed() |
71 | { return closed; } | |
72 | ||
94247295 | 73 | /// close this connection |
a64066eb | 74 | virtual void close(); |
a11e19b7 | 75 | |
94247295 GE |
76 | /** @brief look for new data and store it in the local buffer |
77 | @param usec_timeout wait until new data is found, max timeout usecs. | |
78 | -1: wait endless | |
45a2ebc9 GE |
79 | 0: return instantly |
80 | @param usec_timeout_remaining if non-NULL the function will write the | |
81 | not used time to the given target | |
94247295 GE |
82 | @retval true if new data was found (does not mean that the received data |
83 | is a complete packet though) | |
84 | */ | |
45a2ebc9 GE |
85 | virtual bool fill_buffer(long long usec_timeout=-1,long long* usec_timeout_remaining=NULL)=0; |
86 | ||
a11e19b7 | 87 | bool get_packet(std::string& data); |
94247295 | 88 | |
b2ba0928 GE |
89 | unsigned int peek_packet(std::string& data); |
90 | ||
94247295 | 91 | /// returns true if a complete data packet is in the buffer. retrieve it with get_packet(). |
a11e19b7 GE |
92 | bool packet_available() |
93 | { return bytes_available(); } | |
94 | ||
95 | void write(const std::string& data); | |
a64066eb GE |
96 | |
97 | void add_callback(callback_event_type event, const boost::function<void ()>& func); | |
98 | ||
99 | std::list<boost::function<void ()> > get_callback_list(callback_event_type event); | |
a11e19b7 GE |
100 | }; |
101 | ||
102 | } | |
103 | ||
104 | #endif |