source: libcf++/trunk/src/network.cpp@ 13

Last change on this file since 13 was 13, checked in by cheese, 9 years ago

#1 modify internal code of network module
File size: 11.4 KB
Line 
1/**
2 * @file network.cpp
3 * @author myusgun@gmail.com
4 * @brief network
5 */
6#include "cf/network.h"
7
8#include <iostream>
9#include <sstream>
10#include <string.h>
11
12#ifdef _ON_WINDOWS
13# include <WinSock2.h>
14# pragma comment(lib, "ws2_32.lib")
15#else
16# include <netinet/in.h>
17# include <sys/socket.h>
18# include <arpa/inet.h>
19# include <netdb.h>
20# include <unistd.h>
21# include <sys/un.h>
22# include <fcntl.h>
23# include <errno.h>
24# include <sys/types.h>
25# include <sys/time.h>
26#endif
27
28#ifdef _ON_WINDOWS
29typedef cf::int32_t socklen_t;
30# define sa_family_t cf::uint16_t
31# define ERROR_INTR WSAEINTR
32# define ERROR_CONNECTING WSAEWOULDBLOCK
33# define SOCKET_API_CALL __stdcall
34#else
35# define closesocket(__sock) ::close(__sock)
36# define ERROR_INTR EINTR
37# define ERROR_CONNECTING EINPROGRESS
38# define SOCKET_API_CALL
39#endif
40
41/*--------------------------------------------------------------*/
42/**
43 * do not include "cf/macaddr.[ch]pp"
44 * just declare and call
45 */
46long GetMACAddress(cf::char_t *addr);
47
48static std::string convertAddressToString(struct sockaddr_in & addr)
49{
50 cf::uint8_t * bytes = NULL;
51 cf::char_t str[32] = {0x00};
52
53 bytes = reinterpret_cast<cf::uint8_t *>(&addr.sin_addr.s_addr);
54 snprintf(str, sizeof(str) - 1, "%u.%u.%u.%u", bytes[0],
55 bytes[1],
56 bytes[2],
57 bytes[3]);
58
59 return str;
60}
61
62static cf::void_t waitForTimeout(const cf::socket_t sock,
63 const cf::int32_t timeout,
64 const cf::bool_t checkWriteFD)
65 throw (cf::exception)
66{
67 cf::int32_t result = 0;
68 fd_set rfds;
69 fd_set wfds;
70 fd_set * wfdsPtr = checkWriteFD ? &wfds : NULL;
71
72 struct timeval tv;
73
74 if (timeout <= 0)
75 return;
76
77 FD_ZERO(&rfds);
78 FD_SET(sock, &rfds);
79
80 FD_ZERO(&wfds);
81 FD_SET(sock, &wfds);
82
83 tv.tv_sec = timeout;
84 tv.tv_usec = 0;
85
86 result = select(sock + 1, &rfds, wfdsPtr, NULL, &tv);
87 if (result < 0)
88 THROW_EXCEPTION("select error");
89 else if (result == 0)
90 THROW_EXCEPTION("socket timed out");
91
92 if (!FD_ISSET(sock, &rfds))
93 {
94 if (!checkWriteFD)
95 THROW_EXCEPTION("read fd is not set");
96 else if (!FD_ISSET(sock, &wfds))
97 THROW_EXCEPTION("write fd is not set");
98 }
99}
100
101static cf::void_t setReuseAddress(const cf::network::tcp & tcp)
102 throw (cf::exception)
103{
104 try
105 {
106 cf::int32_t reuseaddr = 1;
107
108 tcp.setOption(SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr));
109 }
110 catch (cf::exception & e)
111 {
112 FORWARD_EXCEPTION(e);
113 }
114}
115
116typedef cf::int32_t (SOCKET_API_CALL * getSocketNameAPI)(cf::socket_t sock,
117 struct sockaddr * addr,
118 socklen_t *len);
119
120static cf::network::host getSocketNameFromFunction(const cf::socket_t sock,
121 getSocketNameAPI api)
122 throw (cf::exception)
123{
124 cf::int32_t result = 0;
125 struct sockaddr_in addr;
126 socklen_t len = sizeof(struct sockaddr_in);
127
128 result = api(sock, (struct sockaddr *)&addr, &len);
129 if (result < 0)
130 THROW_EXCEPTION("cannot get sockket or peer name ("
131 << cf::exception::systemCode()
132 << ")");
133
134 return cf::network::host(convertAddressToString(addr), addr.sin_port);
135}
136/*--------------------------------------------------------------*/
137
138cf::network::host::host(const std::string & address,
139 const cf::uint16_t port)
140 : mAddress(address),
141 mPort(port)
142{
143}
144
145const std::string & cf::network::host::address() const
146{
147 return mAddress;
148}
149
150cf::uint16_t cf::network::host::port() const
151{
152 return mPort;
153}
154
155cf::bool_t cf::network::host::empty() const
156{
157 return (address().empty() || port() <= 0) ? true : false;
158}
159
160cf::network::tcp::tcp(const cf::socket_t attachedSocket)
161 throw (cf::exception)
162 : mSocket (attachedSocket),
163 mTimeout(0)
164{
165 static cf::bool_t isInitialized = false;
166
167 /* initialize socket */
168 if (!isInitialized)
169 {
170#if defined(_WIN32) || defined(_WIN64)
171 WSADATA winsockData;
172 cf::int32_t result = WSAStartup(MAKEWORD(2, 0), &winsockData);
173 if (result)
174 THROW_EXCEPTION("cannot start-up winsock");
175#endif
176
177 isInitialized = true;
178 }
179
180 if (mSocket == UNUSED_SOCKET)
181 mSocket = ::socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
182
183 if (mSocket < 0)
184 THROW_EXCEPTION("cannot create a socket");
185}
186
187cf::network::tcp::~tcp()
188{
189 close();
190}
191
192cf::socket_t cf::network::tcp::descriptor() const
193{
194 return mSocket;
195}
196
197cf::void_t cf::network::tcp::close()
198{
199 if (mSocket == UNUSED_SOCKET)
200 return;
201
202 closesocket(mSocket);
203
204 mSocket = UNUSED_SOCKET;
205}
206
207cf::void_t cf::network::tcp::connect(const cf::network::host & peer,
208 const cf::int32_t timeout)
209 throw (cf::exception)
210{
211 if (peer.empty())
212 THROW_EXCEPTION("invalid host info");
213
214 cf::int32_t result = 0;
215 cf::int32_t retval = 0;
216 cf::int32_t length = 0;
217 struct sockaddr_in addr;
218 struct hostent * hostEnt;
219
220 const cf::char_t * host = peer.address().c_str();
221 cf::uint16_t port = peer.port();
222
223 /* 1. set data */
224 addr.sin_family = AF_INET;
225 addr.sin_port = htons(port);
226 addr.sin_addr.s_addr = inet_addr(host);
227
228 /* 2. get ip from hostname if inet_addr() is failed */
229 if (addr.sin_addr.s_addr == (unsigned int)-1)
230 {
231 hostEnt = gethostbyname(host);
232 if (hostEnt == NULL)
233 THROW_EXCEPTION("cannot get host by name");
234
235 addr.sin_family = (sa_family_t)hostEnt->h_addrtype;
236 memcpy(&(addr.sin_addr.s_addr),
237 hostEnt->h_addr,
238 (size_t)hostEnt->h_length);
239 }
240
241 setTimeout(timeout);
242
243 /* 3. connect */
244 result = ::connect(mSocket, (struct sockaddr *)&addr, sizeof(addr));
245 if (result < 0)
246 {
247 if (timeout > 0)
248 {
249 if (cf::exception::systemCode() != ERROR_CONNECTING)
250 THROW_EXCEPTION("socket connect error");
251
252 try
253 {
254 length = sizeof(retval);
255 waitForTimeout(mSocket, timeout, true);
256 getOption(SO_ERROR, &retval, &length);
257 }
258 catch (cf::exception & e)
259 {
260 FORWARD_EXCEPTION(e);
261 }
262
263 if (retval)
264 THROW_EXCEPTION("SO_ERROR: " << retval);
265 }
266 else
267 {
268 THROW_EXCEPTION("cannot connect to " << host << ":" << port);
269 }
270 }
271}
272
273cf::void_t cf::network::tcp::bind(const cf::uint16_t port) const
274 throw (cf::exception)
275{
276 if (!port)
277 THROW_EXCEPTION("invalid port number");
278
279 cf::int32_t result = 0;
280 struct sockaddr_in addr;
281
282 /* 1. set data */
283 addr.sin_family = AF_INET;
284 addr.sin_addr.s_addr = htonl(INADDR_ANY);
285 addr.sin_port = htons(port);
286
287 /* 2. set options */
288 try
289 {
290 setReuseAddress(*this);
291 }
292 catch (cf::exception & e)
293 {
294 FORWARD_EXCEPTION(e);
295 }
296
297 result = ::bind(mSocket, (struct sockaddr *)&addr, sizeof(struct sockaddr));
298 if (result < 0)
299 THROW_EXCEPTION("cannot bind to " << port);
300}
301
302cf::void_t cf::network::tcp::listen(const cf::int32_t backlog) const
303 throw (cf::exception)
304{
305 cf::int32_t result = ::listen(mSocket, backlog);
306 if (result < 0)
307 THROW_EXCEPTION("cannot listen");
308}
309
310cf::network::tcp cf::network::tcp::accept() const
311 throw (cf::exception)
312{
313 cf::socket_t sock = 0;
314 struct sockaddr_in addr;
315 socklen_t len = sizeof(addr);
316
317 sock = ::accept(mSocket, (struct sockaddr *)&addr, /* in/out */&len);
318 if (sock < 0)
319 THROW_EXCEPTION("cannot accept client");
320
321 return cf::network::tcp(sock).detach();
322}
323
324cf::void_t cf::network::tcp::attach(const cf::socket_t sock)
325 throw (exception)
326{
327 if (sock == UNUSED_SOCKET)
328 THROW_EXCEPTION("has invalid socket");
329
330 mSocket = sock;
331}
332
333cf::socket_t cf::network::tcp::detach()
334 throw (exception)
335{
336 if (mSocket == UNUSED_SOCKET)
337 THROW_EXCEPTION("has invalid socket");
338
339 cf::socket_t sock = mSocket;
340
341 mSocket = UNUSED_SOCKET;
342
343 return sock;
344}
345
346cf::void_t cf::network::tcp::send(const cf::bin & in) const
347 throw (cf::exception)
348{
349 if (in.empty())
350 THROW_EXCEPTION("send data is null or zero-bytes");
351
352 cf::char_t * buf = reinterpret_cast<cf::char_t *>(in.buffer());
353 cf::int32_t size = static_cast<cf::int32_t>(in.size());
354
355 cf::int32_t sentSize = (cf::int32_t)::send (mSocket, buf, size, 0);
356 if (sentSize != size)
357 THROW_EXCEPTION("cannot send (" << cf::exception::systemCode() << ")");
358}
359
360cf::void_t cf::network::tcp::receive(cf::bin & out) const
361 throw (cf::exception)
362{
363 if (out.size() == 0)
364 THROW_EXCEPTION("binary buffer is not created");
365
366 try
367 {
368 waitForTimeout(mSocket, mTimeout, false);
369 }
370 catch (cf::exception & e)
371 {
372 FORWARD_EXCEPTION(e);
373 }
374
375 cf::char_t * buf = reinterpret_cast<cf::char_t *>(out.buffer());
376 cf::int32_t size = static_cast<cf::int32_t>(out.size());
377
378 cf::int32_t receivedSize = (cf::int32_t)::recv(mSocket, buf, size, 0);
379 if (receivedSize < 0)
380 THROW_EXCEPTION("cannot receive (" << cf::exception::systemCode() << ")");
381 else if (receivedSize == 0)
382 THROW_EXCEPTION("connection closed");
383 else if (receivedSize < size)
384 out.resize(receivedSize);
385}
386
387cf::bin cf::network::tcp::receive(const cf::int32_t size) const
388 throw (cf::exception)
389{
390 cf::bin out;
391
392 out.resize(size);
393 receive(out);
394
395 return out;
396}
397
398cf::bin cf::network::tcp::receive() const
399 throw (cf::exception)
400{
401 const cf::size_t bufferSize = 1024;
402
403 cf::bin buffer;
404 cf::bin out;
405
406 buffer.resize(bufferSize);
407
408 do
409 {
410 receive(buffer);
411 out.append(buffer);
412 } while (buffer.size() == bufferSize);
413
414 return out;
415}
416
417cf::void_t cf::network::tcp::getOption(const cf::int32_t optname,
418 cf::void_t * optval,
419 cf::int32_t * optlen) const
420 throw (cf::exception)
421{
422 cf::int32_t result = getsockopt(mSocket,
423 SOL_SOCKET,
424 optname,
425#ifdef _ON_WINDOWS
426 (cf::char_t *)optval,
427#else
428 optval,
429#endif
430 (socklen_t *)optlen);
431 if (result < 0)
432 THROW_EXCEPTION("cannot get socket option ("
433 << cf::exception::systemCode()
434 << ")");
435}
436
437cf::void_t cf::network::tcp::setOption(const cf::int32_t optname,
438 const cf::void_t * optval,
439 const cf::int32_t optlen) const
440 throw (cf::exception)
441{
442 cf::int32_t result = setsockopt(mSocket,
443 SOL_SOCKET,
444 optname,
445#ifdef _ON_WINDOWS
446 (cf::char_t *)optval,
447#else
448 optval,
449#endif
450 (socklen_t)optlen);
451 if (result < 0)
452 THROW_EXCEPTION("cannot set socket option ("
453 << cf::exception::systemCode()
454 << ")");
455}
456
457cf::void_t cf::network::tcp::setNonBlocking(const cf::bool_t flag)
458{
459#ifdef _ON_WINDOWS
460 cf::ulong_t mode = flag ? 1 : 0;
461 ioctlsocket(mSocket, FIONBIO, &mode);
462#else
463 cf::int32_t mode = fcntl(mSocket, F_GETFL, 0);
464
465 if (flag) mode |= O_NONBLOCK;
466 else mode &= ~O_NONBLOCK;
467
468 fcntl(mSocket, F_SETFL, mode);
469#endif
470}
471
472cf::void_t cf::network::tcp::setTimeout(const cf::int32_t seconds)
473{
474 setNonBlocking(seconds > 0 /*? true : false*/);
475 mTimeout = seconds;
476}
477
478cf::network::host cf::network::tcp::peer() const
479 throw (cf::exception)
480{
481 try
482 {
483 return getSocketNameFromFunction(mSocket, getpeername);
484 }
485 catch (cf::exception & e)
486 {
487 FORWARD_EXCEPTION(e);
488 }
489}
490
491cf::network::host cf::network::tcp::local() const
492 throw (cf::exception)
493{
494 try
495 {
496 return getSocketNameFromFunction(mSocket, getsockname);
497 }
498 catch (cf::exception & e)
499 {
500 FORWARD_EXCEPTION(e);
501 }
502}
503
504std::string cf::network::nic::getMACAddress()
505 throw (cf::exception)
506{
507 static const cf::int32_t macSize = 6; /* = 48-bits */
508 static cf::bool_t isDone = false;
509 static cf::uint8_t bytes[macSize] = {0x00,};
510 static cf::char_t asciiz[macSize * 2 + 1] = {0x00,};
511
512 if (!isDone)
513 {
514 long result = 0;
515
516 result = GetMACAddress(reinterpret_cast<cf::char_t *>(bytes));
517 if (result)
518 THROW_EXCEPTION("cannot get mac-address");
519
520 for (cf::int32_t iter = 0 ; iter < macSize ; iter++)
521 snprintf(asciiz + (iter * 2), sizeof(asciiz) - 1,
522 "%02x",
523 bytes[iter]);
524
525 isDone = true;
526 }
527
528 return std::string(asciiz);
529}
530
531
532cf::uint32_t cf::network::byteOrder::htonl(cf::uint32_t in)
533{
534 return ::htonl(in);
535}
536
537cf::uint16_t cf::network::byteOrder::htons(cf::uint16_t in)
538{
539 return ::htons(in);
540}
541
542cf::uint32_t cf::network::byteOrder::ntohl(cf::uint32_t in)
543{
544 return ::ntohl(in);
545}
546
547cf::uint16_t cf::network::byteOrder::ntohs(cf::uint16_t in)
548{
549 return ::ntohs(in);
550}
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