1 | /* |
---|
2 | * ---------------------------------------------------------------------- |
---|
3 | * Implementation of the Socket class. |
---|
4 | * |
---|
5 | * ====================================================================== |
---|
6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
---|
7 | * Purdue Rendering and Perceptualization Lab (PURPL) |
---|
8 | * |
---|
9 | * Copyright (c) 2004-2006 Purdue Research Foundation |
---|
10 | * |
---|
11 | * See the file "license.terms" for information on usage and |
---|
12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
---|
13 | * ====================================================================== |
---|
14 | */ |
---|
15 | #include "Socket.h" |
---|
16 | #include "string.h" |
---|
17 | #include <string.h> |
---|
18 | #include <errno.h> |
---|
19 | #include <fcntl.h> |
---|
20 | |
---|
21 | ssize_t writen(int fd, void *vptr, size_t n) ; |
---|
22 | ssize_t readn(int fd, void *vptr, size_t n) ; |
---|
23 | |
---|
24 | void error(int status, int err, char *fmt, ... ){ |
---|
25 | va_list ap; |
---|
26 | va_start(ap, fmt); |
---|
27 | //fprintf(stderr, "%s: ", program_name); |
---|
28 | vfprintf(stderr, fmt, ap); |
---|
29 | va_end(ap); |
---|
30 | |
---|
31 | if(err) |
---|
32 | fprintf(stderr, ":%s (%d)\n", strerror(err), err); |
---|
33 | if(status) |
---|
34 | exit(status); |
---|
35 | } |
---|
36 | |
---|
37 | void |
---|
38 | set_address(char *hname, char *sname, struct sockaddr_in *sap, char *protocol) |
---|
39 | { |
---|
40 | struct servent *sp; |
---|
41 | struct hostent *hp; |
---|
42 | char *endptr; |
---|
43 | short port; |
---|
44 | |
---|
45 | bzero(sap, sizeof(*sap)); |
---|
46 | sap->sin_family = AF_INET; |
---|
47 | |
---|
48 | if (hname!=NULL) { |
---|
49 | if (!inet_aton(hname, &sap->sin_addr)) { |
---|
50 | hp = gethostbyname(hname); |
---|
51 | if(hp==NULL) { |
---|
52 | error(1, 0, "unknown host: %s\n", hname); |
---|
53 | } |
---|
54 | sap->sin_addr = *(struct in_addr *) hp->h_addr; |
---|
55 | } |
---|
56 | } else { |
---|
57 | sap->sin_addr.s_addr = htonl(INADDR_ANY); |
---|
58 | } |
---|
59 | port = strtol(sname, &endptr, 0); |
---|
60 | if (*endptr=='\0') { |
---|
61 | sap->sin_port = htons(port); |
---|
62 | } else { |
---|
63 | sp = getservbyname(sname, protocol); |
---|
64 | } |
---|
65 | if (sp == NULL) { |
---|
66 | error(1, 0, "unknown service: %s\n", sname); |
---|
67 | } |
---|
68 | } |
---|
69 | |
---|
70 | void parse_GET_string(char *_str, char keys[256][256], char values[256][256], int *count) |
---|
71 | { |
---|
72 | char str[1024]; |
---|
73 | strcpy(str, _str); |
---|
74 | char * pch_amp; |
---|
75 | char * pch_eq; |
---|
76 | //printf ("Splitting string \"%s\" in tokens:\n",str); |
---|
77 | pch_amp = strtok (str,"&"); |
---|
78 | //return; |
---|
79 | int k=0; |
---|
80 | while (pch_amp != NULL) |
---|
81 | { |
---|
82 | char keyval[128]; |
---|
83 | strcpy(keyval, pch_amp); |
---|
84 | |
---|
85 | char *valptr = strchr(keyval, '='); |
---|
86 | |
---|
87 | if (valptr!=NULL) |
---|
88 | { |
---|
89 | *valptr='\0'; |
---|
90 | valptr++; |
---|
91 | |
---|
92 | strcpy(keys[k], keyval); |
---|
93 | strcpy(values[k], valptr); |
---|
94 | } |
---|
95 | else |
---|
96 | { |
---|
97 | strcpy(keys[k], keyval); |
---|
98 | strcpy(values[k], ""); |
---|
99 | } |
---|
100 | //printf("Key - :%s:, Value - :%s:\n", keys[k], values[k]); |
---|
101 | pch_amp = strtok (NULL, "&"); |
---|
102 | k++; |
---|
103 | } |
---|
104 | *count = k; |
---|
105 | } |
---|
106 | |
---|
107 | |
---|
108 | |
---|
109 | Socket::Socket() : |
---|
110 | m_sock ( -1 ) |
---|
111 | { |
---|
112 | |
---|
113 | memset ( &m_addr, |
---|
114 | 0, |
---|
115 | sizeof ( m_addr ) ); |
---|
116 | |
---|
117 | } |
---|
118 | |
---|
119 | Socket::~Socket() |
---|
120 | { |
---|
121 | if ( is_valid() ) |
---|
122 | ::close ( m_sock ); |
---|
123 | } |
---|
124 | |
---|
125 | bool Socket::create() |
---|
126 | { |
---|
127 | m_sock = socket ( AF_INET, |
---|
128 | SOCK_STREAM, |
---|
129 | 0 ); |
---|
130 | |
---|
131 | if ( ! is_valid() ) |
---|
132 | return false; |
---|
133 | |
---|
134 | |
---|
135 | // TIME_WAIT - argh |
---|
136 | int on = 1; |
---|
137 | if ( setsockopt ( m_sock, SOL_SOCKET, SO_REUSEADDR, ( const char* ) &on, sizeof ( on ) ) == -1 ) |
---|
138 | return false; |
---|
139 | |
---|
140 | |
---|
141 | return true; |
---|
142 | |
---|
143 | } |
---|
144 | |
---|
145 | |
---|
146 | |
---|
147 | bool Socket::bind ( const int port ) |
---|
148 | { |
---|
149 | |
---|
150 | if ( ! is_valid() ) |
---|
151 | { |
---|
152 | return false; |
---|
153 | } |
---|
154 | |
---|
155 | m_addr.sin_family = AF_INET; |
---|
156 | m_addr.sin_addr.s_addr = INADDR_ANY; |
---|
157 | m_addr.sin_port = htons ( port ); |
---|
158 | |
---|
159 | int bind_return = ::bind ( m_sock, |
---|
160 | ( struct sockaddr * ) &m_addr, |
---|
161 | sizeof ( m_addr ) ); |
---|
162 | |
---|
163 | |
---|
164 | if ( bind_return == -1 ) |
---|
165 | { |
---|
166 | return false; |
---|
167 | } |
---|
168 | |
---|
169 | return true; |
---|
170 | } |
---|
171 | |
---|
172 | |
---|
173 | bool Socket::listen() const |
---|
174 | { |
---|
175 | if ( ! is_valid() ) |
---|
176 | { |
---|
177 | return false; |
---|
178 | } |
---|
179 | |
---|
180 | //printf("socket:listen:1\n"); |
---|
181 | //fflush(stdout); |
---|
182 | int listen_return = ::listen ( m_sock, MAXCONNECTIONS ); |
---|
183 | //printf("socket:listen:2\n"); |
---|
184 | //fflush(stdout); |
---|
185 | |
---|
186 | |
---|
187 | if ( listen_return == -1 ) |
---|
188 | { |
---|
189 | return false; |
---|
190 | } |
---|
191 | |
---|
192 | return true; |
---|
193 | } |
---|
194 | |
---|
195 | |
---|
196 | bool Socket::accept ( Socket& new_socket ) const |
---|
197 | { |
---|
198 | int addr_length = sizeof ( m_addr ); |
---|
199 | new_socket.m_sock = ::accept ( m_sock, ( sockaddr * ) &m_addr, ( socklen_t * ) &addr_length ); |
---|
200 | |
---|
201 | if ( new_socket.m_sock <= 0 ) |
---|
202 | return false; |
---|
203 | else |
---|
204 | return true; |
---|
205 | } |
---|
206 | |
---|
207 | |
---|
208 | bool Socket::send ( const std::string s ) const |
---|
209 | { |
---|
210 | int status = ::send ( m_sock, s.c_str(), s.size(), MSG_NOSIGNAL ); |
---|
211 | if ( status == -1 ) |
---|
212 | { |
---|
213 | return false; |
---|
214 | } |
---|
215 | else |
---|
216 | { |
---|
217 | return true; |
---|
218 | } |
---|
219 | } |
---|
220 | |
---|
221 | |
---|
222 | bool Socket::send (char* s, int size) const |
---|
223 | { |
---|
224 | //int status = ::send ( m_sock, s, size, MSG_NOSIGNAL ); |
---|
225 | |
---|
226 | int status = writen(m_sock, s, size); |
---|
227 | if ( status == -1 ) |
---|
228 | { |
---|
229 | return false; |
---|
230 | } |
---|
231 | else |
---|
232 | { |
---|
233 | return true; |
---|
234 | } |
---|
235 | } |
---|
236 | |
---|
237 | |
---|
238 | int Socket::recv ( std::string& s ) const |
---|
239 | { |
---|
240 | char buf [ MAXRECV + 1 ]; |
---|
241 | |
---|
242 | s = ""; |
---|
243 | |
---|
244 | memset ( buf, 0, MAXRECV + 1 ); |
---|
245 | int status = ::recv ( m_sock, buf, MAXRECV, 0 ); |
---|
246 | |
---|
247 | if ( status == -1 ) |
---|
248 | { |
---|
249 | std::cout << "status == -1 errno == " << errno << " in Socket::recv\n"; |
---|
250 | return 0; |
---|
251 | } |
---|
252 | else if ( status == 0 ) |
---|
253 | { |
---|
254 | return 0; |
---|
255 | } |
---|
256 | else |
---|
257 | { |
---|
258 | s = buf; |
---|
259 | return status; |
---|
260 | } |
---|
261 | } |
---|
262 | |
---|
263 | |
---|
264 | int Socket::recv (char* s, int size) const |
---|
265 | { |
---|
266 | |
---|
267 | //int status = ::recv ( m_sock, s, size, 0 ); |
---|
268 | int status = readn( m_sock, s, size); |
---|
269 | |
---|
270 | if ( status == -1 ) |
---|
271 | { |
---|
272 | std::cout << "status == -1 errno == " << errno << " in Socket::recv\n"; |
---|
273 | return 0; |
---|
274 | } |
---|
275 | else if ( status == 0 ) |
---|
276 | { |
---|
277 | return 0; |
---|
278 | } |
---|
279 | else |
---|
280 | { |
---|
281 | return status; |
---|
282 | } |
---|
283 | } |
---|
284 | |
---|
285 | |
---|
286 | bool Socket::connect ( const std::string host, const int port ) |
---|
287 | { |
---|
288 | if ( ! is_valid() ) return false; |
---|
289 | |
---|
290 | m_addr.sin_family = AF_INET; |
---|
291 | m_addr.sin_port = htons ( port ); |
---|
292 | |
---|
293 | int status = inet_pton ( AF_INET, host.c_str(), &m_addr.sin_addr ); |
---|
294 | |
---|
295 | if ( errno == EAFNOSUPPORT ) return false; |
---|
296 | |
---|
297 | status = ::connect ( m_sock, ( sockaddr * ) &m_addr, sizeof ( m_addr ) ); |
---|
298 | |
---|
299 | if ( status == 0 ) |
---|
300 | return true; |
---|
301 | else |
---|
302 | return false; |
---|
303 | } |
---|
304 | |
---|
305 | void Socket::set_non_blocking ( const bool b ) |
---|
306 | { |
---|
307 | |
---|
308 | int opts; |
---|
309 | |
---|
310 | opts = fcntl ( m_sock, |
---|
311 | F_GETFL ); |
---|
312 | |
---|
313 | if ( opts < 0 ) |
---|
314 | { |
---|
315 | return; |
---|
316 | } |
---|
317 | |
---|
318 | if ( b ) |
---|
319 | opts = ( opts | O_NONBLOCK ); |
---|
320 | else |
---|
321 | opts = ( opts & ~O_NONBLOCK ); |
---|
322 | |
---|
323 | fcntl ( m_sock, |
---|
324 | F_SETFL,opts ); |
---|
325 | |
---|
326 | } |
---|
327 | |
---|
328 | ssize_t readn(int fd, void *vptr, size_t n) |
---|
329 | { |
---|
330 | size_t nleft; |
---|
331 | ssize_t nread; |
---|
332 | char* ptr; |
---|
333 | |
---|
334 | ptr = (char*) vptr; |
---|
335 | nleft = n; |
---|
336 | |
---|
337 | while(nleft > 0){ |
---|
338 | if((nread=read(fd, ptr, nleft))<0){ |
---|
339 | if(errno==EINTR) |
---|
340 | nread = 0; |
---|
341 | else |
---|
342 | return(-1); |
---|
343 | } |
---|
344 | else if(nread==0){ |
---|
345 | fprintf(stderr, "socket::readn nread==0\n"); |
---|
346 | break; |
---|
347 | } |
---|
348 | |
---|
349 | nleft -= nread; |
---|
350 | ptr += nread; |
---|
351 | } |
---|
352 | |
---|
353 | return (n-nleft); //return n>=0 |
---|
354 | } |
---|
355 | |
---|
356 | |
---|
357 | ssize_t writen(int fd, void *vptr, size_t n) |
---|
358 | { |
---|
359 | size_t nleft; |
---|
360 | ssize_t nwritten; |
---|
361 | const char* ptr; |
---|
362 | |
---|
363 | ptr = (char*) vptr; |
---|
364 | nleft = n; |
---|
365 | |
---|
366 | while(nleft > 0){ |
---|
367 | if((nwritten=write(fd, ptr, nleft))<=0){ |
---|
368 | if(errno==EINTR) |
---|
369 | nwritten = 0; |
---|
370 | else |
---|
371 | return(-1); |
---|
372 | } |
---|
373 | nleft -= nwritten; |
---|
374 | ptr += nwritten; |
---|
375 | } |
---|
376 | |
---|
377 | return (n); |
---|
378 | } |
---|