1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
|
/*
XSocket.cc
*/
#include "XSocket.h"
struct sigaction actx, oldactx;
XSocket::XSocket ()
{
wsock = INVALID_SOCKET;
}
XSocket::XSocket (int awsock)
{
wsock = awsock;
}
XSocket::~XSocket ()
{
}
int XSocket::getSock (void)
{
return wsock;
}
void XSocket::SetSock (int sock)
{
wsock = sock;
fsock = fdopen (wsock, "r+");
}
void XSocket::Close ()
{
if (wsock != INVALID_SOCKET)
{
shutdown (wsock, 2);
close (wsock);
wsock = INVALID_SOCKET;
}
}
/*
IF IS POSSIBLE, DO NOT USE. ADD 4 kb OF MEM FOR THE fgets
bool XSocket::Gets (char buf[], int nbytes)
{
if (fgets (buf, nbytes, fsock) == NULL) return false;
else
{
QuitaRetornoCarroDeLinea (buf);
buf[strlen(buf)] = '\0';
return true;
}
}
*/
bool XSocket::Gets (char buf[], int nbytes)
{
int ret, i = 0;
buf[0] = '\0';
for(;;)
{
if ((ret = read(wsock, &buf[i], 1) <= 0))
{
if ((ret == ERROR_SOCKET) && (errno == EINTR)) continue;
return false;
}
if (buf[i] == '\r') continue;
if (buf[i] == '\n')
{
buf[i] = '\0';
QuitaRetornoCarroDeLinea (buf);
return true;
}
if (++i == nbytes)
{
buf[nbytes] = '\0';
QuitaRetornoCarroDeLinea (buf);
return true;
}
}
}
void xsprocsignals (int signal_type)
{
switch (signal_type)
{
/* TIMEOUT. Alarm signal. */
case SIGALRM:
sigaction (SIGALRM, &oldactx, NULL);
break;
}
}
/* Open a TCP connection. Return socket descriptor if OK, else ERROR_SOCKET on error*/
int XSocket::do_client_inet (char *host, char *service, int port, int timeout)
/*
char *host; name or dotted-decimal addr of other system
char *service; name of service being requested, can be NULL, if port > 0
int port; if == 0, nothing special - use port# of service
if < 0, bind a local reserved port
if > 0, it's the port# of server (host-byte-order)
*/
{
struct sockaddr_in srv_addr;
xulong inaddr;
struct servent *sp;
struct hostent *hp;
int fd, res;
/*Initialize the server's Internet address structure.
We'll store the actual 4-byte Internet address and the
2-byte port# below */
memset((char *) &srv_addr, 0, sizeof(srv_addr));
srv_addr.sin_family = AF_INET;
if (service != NULL)
{
if ((sp = getservbyname(service, "tcp")) == NULL) return(ERROR_SOCKET);
if (port > 0) srv_addr.sin_port = htons(port);
else srv_addr.sin_port = sp->s_port;
}
else
{
if (port <= 0) return(ERROR_SOCKET);
srv_addr.sin_port = htons(port);
}
/*Try to convert the host name as a dotted-decimal number. If fails do we call gethostbyname().*/
if ((inaddr = inet_addr(host)) != INADDR_BROADCAST)
{
/* it's dotted-decimal */
bcopy((char *) &inaddr, (char *) &srv_addr.sin_addr, sizeof(inaddr));
}
else
{
if ((hp = gethostbyname(host)) == NULL) return(ERROR_SOCKET);
bcopy(hp->h_addr, (char *) &srv_addr.sin_addr, hp->h_length);
}
if (port >= 0)
{
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) return(ERROR_SOCKET);
}
else if (port < 0) return(ERROR_SOCKET);
sigemptyset(&actx.sa_mask); actx.sa_flags = 0; actx.sa_handler = xsprocsignals;
sigaction (SIGALRM, &actx, &oldactx);
alarm (timeout);
res = connect(fd, (struct sockaddr *) &srv_addr, sizeof(srv_addr));
sigaction (SIGALRM, &oldactx, NULL);
if (res < 0)
{
close(fd);
return(ERROR_SOCKET);
}
return(fd); /* all OK */
}
int XSocket::do_client_unix (char *filesocket)
{
struct sockaddr_un srv_addr;
int sock;
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {perror("socket"); return(ERROR_SOCKET);}
srv_addr.sun_family = AF_UNIX;
strncpy(srv_addr.sun_path, filesocket, sizeof(srv_addr.sun_path)-1);
srv_addr.sun_path[sizeof(srv_addr.sun_path)-1] = '\0';
if (connect (sock, (sockaddr *)&srv_addr, sizeof(srv_addr)) < 0)
{
perror ("connect");
perror (filesocket);
return (ERROR_SOCKET);
}
return (sock);
}
int XSocket::Puts (const char *buf)
{
return (Write(buf, strlen(buf)));
}
/* Return:
* val > 0 -> data available
* val == 0 -> no data available
* val == -1 -> error
*/
int XSocket::Read (char *buf, int nbytes)
{
int n;
if ((n = read(wsock, buf, nbytes)) > 0)
{
return(n);
}
if ((n == ERROR_SOCKET) && (errno == EWOULDBLOCK))
{
return(0);
}
return(ERROR_SOCKET);
}
int XSocket::Write (const char *buf, int nbytes)
{
int nleft, nwritten;
nleft = nbytes;
while(nleft > 0)
{
if ((nwritten = write(wsock, buf, nleft)) == -1)
{
if (errno == EWOULDBLOCK) continue;
//Another error can be SIGPIPE (EPIPE, 32)
else if (errno == EPIPE) return (ERROR_SOCKET_PIPE);
return(ERROR_SOCKET);
}
nleft -= nwritten;
buf += nwritten;
}
return(nbytes);
}
char *XSocket::Client_name (void)
{
socklen_t len;
struct sockaddr_in sin;
struct hostent *host, hostent;
len = sizeof (sin);
if (getpeername (wsock, (struct sockaddr *) &sin, &len) < 0)
{
return "";
}
else
{
if ((host = gethostbyaddr ((char *) &sin.sin_addr, sizeof (struct in_addr), AF_INET)) == 0)
{
host = &hostent;
host->h_name = inet_ntoa (sin.sin_addr);
return host->h_name;
}
else
{
return host->h_name;
}
}
}
/* Take a service name, and a service type, and return a port number. If the
service name is not found, it tries it as a decimal number. The number
returned is byte ordered for the network. */
int XSocket::atoport (char *service, char *proto)
{
int port;
long int lport;
struct servent *serv;
char *errpos;
serv = getservbyname(service, proto);
if (serv != NULL) port = serv->s_port;
else
{
lport = strtol(service,&errpos,0);
if ((errpos[0] != 0) || (lport < 1) || (lport > 65535)) {return ERROR_SOCKET;}
port = htons((int)lport);
}
return port;
}
/* This ignores the SIGPIPE signal. This is usually a good idea, since
the default behaviour is to terminate the application. SIGPIPE is
sent when you try to write to an unconnected socket. You should
check your return codes to make sure you catch this error! */
void XSocket::ignore_pipe(void)
{
struct sigaction sig;
sig.sa_handler = SIG_IGN;
sig.sa_flags = 0;
sigemptyset(&sig.sa_mask);
sigaction(SIGPIPE,&sig,NULL);
}
/* This function listens on a port, and returns connections. It forks
returns off internally, so your main function doesn't have to worry
about that. This can be confusing if you don't know what is going on.
The function will create a new process for every incoming connection,
so in the listening process, it will never return. Only when a connection
comes in, and we create a new process for it will the function return.
This means that your code that calls it should _not_ loop.
The parameters are as follows:
socket_type: SOCK_STREAM or SOCK_DGRAM (TCP or UDP sockets)
port: The port to listen on. Remember that ports < 1024 are
reserved for the root user. Must be passed in network byte
order (see "man htons").
listener: This is a pointer to a variable for holding the file
descriptor of the socket which is being used to listen. It
is provided so that you can write a signal handler to close
it in the event of program termination. If you aren't interested,
just pass NULL. Note that all modern unixes will close file
descriptors for you on exit, so this is not required. */
int XSocket::do_server_inet (int socket_type, u_short port, int *listener)
{
struct sockaddr_in address_inet;
int listening_socket;
int connected_socket = ERROR_SOCKET;
int new_process;
int reuse_addr = 1, res;
/* Setup internet address information.This is used with the bind() call */
memset((char *) &address_inet, 0, sizeof(address_inet));
address_inet.sin_family = AF_INET;
address_inet.sin_port = port;
address_inet.sin_addr.s_addr = htonl(INADDR_ANY);
listening_socket = socket(AF_INET, socket_type, 0);
if (listening_socket < 0)
{
perror("socket");
exit(EXIT_FAILURE);
}
if (listener != NULL) *listener = listening_socket;
setsockopt(listening_socket, SOL_SOCKET, SO_REUSEADDR, &reuse_addr, sizeof(reuse_addr));
res = bind(listening_socket, (struct sockaddr *) &address_inet, sizeof(address_inet));
if (res < 0)
{
perror("bind");
close(listening_socket);
exit(EXIT_FAILURE);
}
if (socket_type == SOCK_STREAM)
{
listen(listening_socket, 5); /*Queue up to five connections before having them automatically rejected. */
while(connected_socket < 0)
{
connected_socket = accept(listening_socket, NULL, NULL);
if (connected_socket < 0)
{
/* Either a real error occured, or blocking was interrupted for
some reason. Only abort execution if a real error occured. */
if (errno != EINTR)
{
perror("accept");
close(listening_socket);
exit(EXIT_FAILURE);
}
else
{
continue; /* don't fork - do the accept again */
}
}
new_process = fork();
if (new_process < 0)
{
perror("fork");
close(connected_socket);
connected_socket = ERROR_SOCKET;
}
else
{ /* We have a new process... */
if (new_process == 0)
{
/* This is the new process. */
close(listening_socket); /* Close our copy of this socket */
if (listener != NULL) *listener = -1; /* Closed in this process. We are not responsible for it. */
}
else
{
/* This is the main loop.Close copy of connected socket, and continue loop. */
close(connected_socket);
connected_socket = ERROR_SOCKET;
}
}
}
return connected_socket;
}
else
{
return listening_socket;
}
}
int XSocket::do_server_unix (int socket_type, int *listener)
{
struct sockaddr_un address_unix;
int listening_socket;
int connected_socket = ERROR_SOCKET;
int new_process;
int reuse_addr = 1, res, socketsize;
char fn[300];
TBuffer tmpbuf;
listening_socket = socket(AF_UNIX, socket_type, 0);
if (listening_socket < 0)
{
perror("socket");
exit(EXIT_FAILURE);
}
if (listener != NULL) *listener = listening_socket;
setsockopt(listening_socket, SOL_SOCKET, SO_REUSEADDR, &reuse_addr, sizeof(reuse_addr));
socketsize = SOCKETSIZE;
setsockopt(listening_socket, SOL_SOCKET, SO_RCVBUF, &socketsize, sizeof(socketsize));
setsockopt(listening_socket, SOL_SOCKET, SO_SNDBUF, &socketsize, sizeof(socketsize));
strncpy (fn, make_root_socket(tmpbuf), 300 - 1);
fn[300 - 1] = '\0';
//if (FileExists (fn) == true) DeleteFile (fn);
DeleteFile (fn);
address_unix.sun_family = AF_UNIX;
strncpy(address_unix.sun_path, fn, sizeof(address_unix.sun_path)-1);
address_unix.sun_path[sizeof(address_unix.sun_path)-1] = '\0';
res = bind(listening_socket, (sockaddr *)&address_unix, sizeof(address_unix));
if (res < 0) {perror("bind"); close(listening_socket); exit(EXIT_FAILURE);}
chmod (fn, S_IWOTH | S_IWGRP | S_IWUSR);
if (socket_type == SOCK_STREAM)
{
listen(listening_socket, 5); /*Queue up to five connections before having them automatically rejected. */
while(connected_socket < 0)
{
connected_socket = accept(listening_socket, NULL, NULL);
if (connected_socket < 0)
{
/* Either a real error occured, or blocking was interrupted for some reason. Only abort execution if a real error occured. */
if (errno != EINTR)
{
perror("accept");
close(listening_socket);
return (ERROR_SOCKET);
}
else
{
continue; /* don't fork - do the accept again */
}
}
new_process = fork();
if (new_process < 0)
{
perror("fork");
close(connected_socket);
connected_socket = ERROR_SOCKET;
}
else
{ /* We have a new process... */
if (new_process == 0)
{
/* This is the new process. */
close(listening_socket); /* Close our copy of this socket */
if (listener != NULL) *listener = -1; /* Closed in this process. We are not responsible for it. */
}
else
{
/* This is the main loop.Close copy of connected socket, and continue loop. */
close(connected_socket);
connected_socket = ERROR_SOCKET;
}
}
}
return connected_socket;
}
else
{
return listening_socket;
}
}
void XSocket::do_server_unix_only_bind (int socket_type, int *listener, char *fn)
{
struct sockaddr_un address_unix;
int listening_socket;
int reuse_addr = 1, res, socketsize;
listening_socket = socket(AF_UNIX, socket_type, 0);
if (listening_socket < 0) {perror("socket"); exit(EXIT_FAILURE);}
if (listener != NULL) *listener = listening_socket;
setsockopt(listening_socket, SOL_SOCKET, SO_REUSEADDR, &reuse_addr, sizeof(reuse_addr));
socketsize = SOCKETSIZE;
setsockopt(listening_socket, SOL_SOCKET, SO_RCVBUF, &socketsize, sizeof(socketsize));
setsockopt(listening_socket, SOL_SOCKET, SO_SNDBUF, &socketsize, sizeof(socketsize));
if (FileExists (fn) == true) DeleteFile (fn);
address_unix.sun_family = AF_UNIX;
strncpy(address_unix.sun_path, fn, sizeof(address_unix.sun_path)-1);
address_unix.sun_path[sizeof(address_unix.sun_path)-1] = '\0';
res = bind(listening_socket, (sockaddr *)&address_unix, sizeof(address_unix));
if (res < 0) {perror("bind"); close(listening_socket); exit(EXIT_FAILURE);}
chmod (fn, S_IWOTH | S_IWGRP | S_IWUSR);
if (socket_type == SOCK_STREAM) {listen(listening_socket, 5);}
}
int XSocket::Send_TO (const char* buf, int TimeoutSeconds)
{
int BytesSent;
fd_set fd;
struct timeval tv;
FD_ZERO (&fd);
FD_SET (wsock, &fd); // adds sock to the file descriptor set
tv.tv_sec = TimeoutSeconds;
tv.tv_usec = 0;
if (0 == wsock) {return (0);} // Allready closed
// The return value is smaller than 'Size' when the Client breakes the operation down.
if (select (wsock + 1, NULL, &fd, NULL, &tv) == 0)
{
//UpdateSocket (Socket);
//Socket->m_LastFunction = "Send Timeout";
return (0);
}
BytesSent = send (wsock, (char *) buf, strlen(buf), 0);
if (BytesSent == -1)
{
BytesSent = 0;
//UpdateSocket (Socket);
}
//Socket->m_LastFunction = "Send";
return (BytesSent);
}
|