105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
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/* Copyright (C) 2012 mbed.org, MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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* and associated documentation files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge, publish, distribute,
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* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SOCKET_H_
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#define SOCKET_H_
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#include "lwip/sockets.h"
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#include "lwip/netdb.h"
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//DNS
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inline struct hostent *gethostbyname(const char *name) {
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return lwip_gethostbyname(name);
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}
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inline int gethostbyname_r(const char *name, struct hostent *ret, char *buf, size_t buflen, struct hostent **result, int *h_errnop) {
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return lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
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}
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class TimeInterval;
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/** Socket file descriptor and select wrapper
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*/
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class Socket {
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public:
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/** Socket
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*/
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Socket();
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/** Set blocking or non-blocking mode of the socket and a timeout on
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blocking socket operations
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\param blocking true for blocking mode, false for non-blocking mode.
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\param timeout timeout in ms [Default: (1500)ms].
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*/
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void set_blocking(bool blocking, unsigned int timeout=1500);
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/** Set socket options
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\param level stack level (see: lwip/sockets.h)
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\param optname option ID
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\param optval option value
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\param socklen_t length of the option value
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\return 0 on success, -1 on failure
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*/
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int set_option(int level, int optname, const void *optval, socklen_t optlen);
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/** Get socket options
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\param level stack level (see: lwip/sockets.h)
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\param optname option ID
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\param optval buffer pointer where to write the option value
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\param socklen_t length of the option value
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\return 0 on success, -1 on failure
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*/
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int get_option(int level, int optname, void *optval, socklen_t *optlen);
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/** Close the socket
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\param shutdown free the left-over data in message queues
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*/
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int close(bool shutdown=true);
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~Socket();
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protected:
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int _sock_fd;
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int init_socket(int type);
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int wait_readable(TimeInterval& timeout);
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int wait_writable(TimeInterval& timeout);
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bool _blocking;
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unsigned int _timeout;
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private:
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int select(struct timeval *timeout, bool read, bool write);
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};
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/** Time interval class used to specify timeouts
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*/
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class TimeInterval {
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friend class Socket;
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public:
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/** Time Interval
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\param ms time interval expressed in milliseconds
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*/
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TimeInterval(unsigned int ms);
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private:
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struct timeval _time;
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};
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#endif /* SOCKET_H_ */
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