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1 | // Socket.C -*- C++ -*- |
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2 | // Copyright (C) 2002,2005 Clinton Ebadi |
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3 | // Copyright (c) 1997, 1998 Etienne BERNARD |
4 | |
5 | // This program is free software; you can redistribute it and/or modify |
6 | // it under the terms of the GNU General Public License as published by |
7 | // the Free Software Foundation; either version 2 of the License, or |
8 | // any later version. |
9 | |
10 | // This program is distributed in the hope that it will be useful, |
11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | // GNU General Public License for more details. |
14 | |
15 | // You should have received a copy of the GNU General Public License |
16 | // along with this program; if not, write to the Free Software |
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17 | // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
18 | // 02110-1301, USA. |
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19 | |
20 | #include "Socket.H" |
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21 | #include "Bot.H" |
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22 | #include <string> |
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23 | |
24 | #include <sys/types.h> |
25 | #include <sys/socket.h> |
26 | #include <netdb.h> |
27 | #include <netinet/in.h> |
28 | #include <arpa/inet.h> |
29 | #include <string.h> |
30 | #include <unistd.h> |
31 | #include <fcntl.h> |
32 | #include <errno.h> |
33 | |
34 | Socket::Socket() |
35 | : remotePort(0), remoteAddress(0), |
36 | localPort(0), localAddress(0) |
37 | { |
38 | fd = new s_fd; |
39 | fd->fd = socket(AF_INET, SOCK_STREAM, 0); |
40 | } |
41 | |
42 | Socket::Socket(int newfd, unsigned long newAddress, int newPort) |
43 | : remotePort(newPort), remoteAddress(newAddress), |
44 | localPort(0), localAddress(0) |
45 | { |
46 | fd = new s_fd; |
47 | fd->fd = newfd; |
48 | } |
49 | |
50 | Socket::Socket(const Socket &s) |
51 | : remotePort(s.remotePort), remoteAddress(s.remoteAddress), |
52 | localPort(s.localPort), localAddress(s.localAddress) |
53 | { |
54 | s.fd->n++; |
55 | fd = s.fd; |
56 | } |
57 | |
58 | Socket::~Socket() |
59 | { |
60 | if (--fd->n == 0) { |
61 | close(); |
62 | delete fd; |
63 | } |
64 | } |
65 | |
66 | int |
67 | Socket::getRemotePort() const |
68 | { |
69 | return remotePort; |
70 | } |
71 | |
72 | int |
73 | Socket::getLocalPort() const |
74 | { |
75 | return localPort; |
76 | } |
77 | |
78 | int |
79 | Socket::getFileDescriptor() const |
80 | { |
81 | return fd->fd; |
82 | } |
83 | |
84 | bool |
85 | Socket::isConnected() |
86 | { |
87 | return fd->fd != -1; |
88 | } |
89 | |
90 | bool |
91 | Socket::setRemoteHostname(String hostname) |
92 | { |
93 | struct hostent *host; |
94 | |
95 | if ((host = gethostbyname((const char *)hostname)) == 0) |
96 | return false; |
97 | |
98 | memcpy(&remoteAddress, host->h_addr, host->h_length); |
99 | remoteAddress = ntohl(remoteAddress); |
100 | |
101 | return true; |
102 | } |
103 | |
104 | bool |
105 | Socket::setRemoteIP(unsigned long address) |
106 | { |
107 | remoteAddress = address; |
108 | return true; |
109 | } |
110 | |
111 | bool |
112 | Socket::setRemotePort(int p) |
113 | { |
114 | remotePort = p; |
115 | |
116 | return true; |
117 | } |
118 | |
119 | bool |
120 | Socket::setLocalHostname(String hostname) |
121 | { |
122 | struct hostent *host; |
123 | |
124 | if ((host = gethostbyname((const char *)hostname)) == 0) |
125 | return false; |
126 | |
127 | memcpy(&localAddress, host->h_addr, host->h_length); |
128 | |
129 | struct sockaddr_in local_addr; |
130 | local_addr.sin_family = AF_INET; |
131 | local_addr.sin_port = htons(localPort); |
132 | local_addr.sin_addr.s_addr = htonl(localAddress); |
133 | if (bind(fd->fd, (struct sockaddr *)(&local_addr), sizeof(local_addr)) < 0) |
134 | return false; |
135 | |
136 | return true; |
137 | } |
138 | |
139 | bool |
140 | Socket::setLocalIP(unsigned long address) |
141 | { |
142 | localAddress = address; |
143 | |
144 | struct sockaddr_in local_addr; |
145 | local_addr.sin_family = AF_INET; |
146 | local_addr.sin_port = htons(localPort); |
147 | local_addr.sin_addr.s_addr = htonl(localAddress); |
148 | if (bind(fd->fd, (struct sockaddr *)(&local_addr), sizeof(local_addr)) < 0) |
149 | return false; |
150 | |
151 | return true; |
152 | } |
153 | |
154 | bool |
155 | Socket::setLocalPort(int p) |
156 | { |
157 | localPort = p; |
158 | |
159 | struct sockaddr_in local_addr; |
160 | local_addr.sin_family = AF_INET; |
161 | local_addr.sin_port = htons(localPort); |
162 | local_addr.sin_addr.s_addr = htonl(localAddress); |
163 | if (bind(fd->fd, (struct sockaddr *)(&local_addr), sizeof(local_addr)) < 0) |
164 | return false; |
165 | |
166 | return true; |
167 | } |
168 | |
169 | bool |
170 | Socket::setNonBlocking(bool nonblock) |
171 | { |
172 | long flags; |
173 | |
174 | if (fd->fd == -1) |
175 | return false; |
176 | |
177 | // We first get the file descriptor's flags |
178 | if (!fcntl(fd->fd, F_GETFL, &flags)) |
179 | return false; |
180 | |
181 | if (nonblock) |
182 | return fcntl(fd->fd, F_SETFL, flags | O_NONBLOCK); |
183 | else |
184 | return fcntl(fd->fd, F_SETFL, flags & ~O_NONBLOCK); |
185 | } |
186 | |
187 | bool |
188 | Socket::connect() |
189 | { |
190 | struct sockaddr_in addr; |
191 | memset(&addr, 0, sizeof(addr)); |
192 | addr.sin_family = AF_INET; |
193 | addr.sin_addr.s_addr = htonl(remoteAddress); |
194 | addr.sin_port = htons(remotePort); |
195 | if (::connect(fd->fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) |
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196 | { |
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197 | // Bot::logLine (String("Socket Error: ") |
198 | // + strerror (errno) + String("\n")); |
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199 | return false; |
200 | } |
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201 | |
202 | return true; |
203 | } |
204 | |
205 | bool |
206 | Socket::listen(int backlog) |
207 | { |
208 | return ::listen(fd->fd, backlog) == 0; |
209 | } |
210 | |
211 | Socket |
212 | Socket::accept() |
213 | { |
214 | struct sockaddr_in addr; |
215 | socklen_t addrlen=sizeof(addr); |
216 | int newfd = ::accept(fd->fd, (sockaddr *)&addr, &addrlen); |
217 | if (newfd == -1) |
218 | return Socket(-1, 0, 0); |
219 | unsigned long newRemoteAddress = ntohl(addr.sin_addr.s_addr); |
220 | int newRemotePort = ntohs(addr.sin_port); |
221 | return Socket(newfd, newRemoteAddress, newRemotePort); |
222 | } |
223 | |
224 | void |
225 | Socket::close() |
226 | { |
227 | ::close(fd->fd); |
228 | fd->fd = -1; |
229 | } |
230 | |
231 | bool |
232 | Socket::write(String s, bool m) |
233 | { |
234 | if (fd->fd == -1) |
235 | return false; |
236 | |
237 | if (m) { |
238 | if (::write(fd->fd, (const char *)s, s.length()) + |
239 | ::write(fd->fd, "\n", 1) != s.length() + 1) |
240 | return false; |
241 | } |
242 | else |
243 | if (::write(fd->fd, (const char *)s, s.length()) + |
244 | ::write(fd->fd, "\r\n", 2) != s.length() + 2) |
245 | return false; |
246 | |
247 | return true; |
248 | } |
249 | |
250 | String |
251 | Socket::readLine() |
252 | { |
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253 | // fixme: this could probably be sped up (use some faster way of |
254 | // reading from the socket than reading a char at a time) |
255 | |
256 | // We allocate the buffer statically to keep from having to overhead |
257 | // of reallocating a new buffer every time we call this (which is |
258 | // every time anything happens on IRC so the overhead of |
259 | // re-allocating a buffer every time is potentially too large). |
260 | // |
261 | // Since it is static, and the length of lines will differ for each |
262 | // read, an embedded \0 is inserted after the last character of the |
263 | // line and then a copy of the the c_str is returned as a String so |
264 | // that only the line that was just read is returned. |
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265 | static std::string buf (512, ' '); |
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266 | |
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267 | std::string::size_type pos = 0; // pos in buffer |
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268 | int nb; // number of bytes read by ::read |
269 | char r; // temp var for storing output of read into |
270 | std::string::size_type length = buf.length (); |
271 | |
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272 | do |
273 | { |
274 | nb = ::read(fd->fd, &r, 1); |
275 | switch (nb) { |
276 | case 0: |
277 | return String(""); |
278 | case -1: |
279 | if (errno != EINTR && errno != EAGAIN) |
280 | return String(""); |
281 | sleep(1); |
282 | } |
283 | |
284 | if (nb != -1) |
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285 | if (pos < length) |
286 | buf[pos++] = r; |
287 | else |
288 | { |
289 | buf.resize (length * 2); |
290 | length = buf.length (); |
291 | buf[pos++] = r; |
292 | } |
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293 | } while (r != '\n'); |
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294 | |
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295 | if (pos > 1 && buf[pos-2] == '\r') |
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296 | { |
297 | buf[pos-2] = '\0'; |
298 | return String (buf.substr (0, pos - 2)); |
299 | } |
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300 | else |
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301 | { |
302 | buf[pos-1] = '\0'; |
303 | return String (buf.substr (0, pos - 1)); |
304 | } |
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305 | } |
306 | |
307 | String |
308 | Socket::readChar() |
309 | { |
310 | char r[2]; |
311 | int nb; |
312 | nb = ::read(fd->fd, &r, 1); |
313 | switch (nb) { |
314 | case 0: |
315 | return String(""); |
316 | case -1: |
317 | if(errno != EINTR && errno != EAGAIN) |
318 | return String(""); |
319 | sleep(1); |
320 | } |
321 | r[1] = '\0'; |
322 | return String(r); |
323 | } |
324 | |
325 | |
326 | // // Here we use a circular buffer to read from the socket |
327 | // String |
328 | // Socket::readLine() |
329 | // { |
330 | // // The result string |
331 | // char result[512]; |
332 | // // Position in the result string |
333 | // int pos = 0; |
334 | // // Number of chars read from the socket |
335 | // int nb; |
336 | |
337 | // // First, we read from the socket |
338 | // beginning: |
339 | // if (end <= begin) { |
340 | // nb = ::read(fd->fd, buf+end, begin - end); |
341 | // } else { |
342 | // nb = ::read(fd->fd, buf+end, 1024 - end); |
343 | // } |
344 | |
345 | // if (nb == -1 && errno != EINTR && errno != EAGAIN) |
346 | // return String(""); |
347 | |
348 | // end = (end + nb) % 1024; |
349 | |
350 | // // Fine, now we read our string from the buffer |
351 | // while (buf[begin] != '\r' && buf[begin] != '\n') { |
352 | // result[pos++] = buf[begin++]; |
353 | // begin %= 1024; |
354 | // if (begin == end) |
355 | // goto beginning; |
356 | // } |
357 | |
358 | // result[pos] = '\0'; |
359 | |
360 | // // Now we skip the final '\r' and '\n' |
361 | // if (buf[begin] == '\r') |
362 | // begin = (begin + 1) % 1024; |
363 | // if (buf[begin] == '\n') |
364 | // begin = (begin + 1) % 1024; |
365 | |
366 | // // And we return the result |
367 | // return String(result); |
368 | // } |
369 | |
370 | // bool |
371 | // Socket::hasData() |
372 | // { |
373 | // cout << "DEBUG hasData = " << (begin != end) << endl; |
374 | // return begin != end; |
375 | // } |