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62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Generic non-forking server infrastructure.
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* Intended to make writing telnetd-type servers easier.
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*
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* Copyright (C) 2007 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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/* opaque structure */
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struct isrv_state_t;
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typedef struct isrv_state_t isrv_state_t;
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/* callbacks */
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void isrv_want_rd(isrv_state_t *state, int fd);
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void isrv_want_wr(isrv_state_t *state, int fd);
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void isrv_dont_want_rd(isrv_state_t *state, int fd);
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void isrv_dont_want_wr(isrv_state_t *state, int fd);
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int isrv_register_fd(isrv_state_t *state, int peer, int fd);
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void isrv_close_fd(isrv_state_t *state, int fd);
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int isrv_register_peer(isrv_state_t *state, void *param);
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/* Driver:
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*
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* Select on listen_fd for <linger_timeout> (or forever if 0).
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*
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* If we time out and we have no peers, exit.
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* If we have peers, call do_timeout(peer_param),
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* if it returns !0, peer is removed.
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*
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* If listen_fd is active, accept new connection ("peer"),
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* call new_peer() on it, and if it returns 0,
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* add it to fds to select on.
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* Now, select will wait for <timeout>, not <linger_timeout>
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* (as long as we have more than zero peers).
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*
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* If a peer's fd is active, we call do_rd() on it if read
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* bit was set, and then do_wr() if write bit was also set.
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* If either returns !0, peer is removed.
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* Reaching this place also resets timeout counter for this peer.
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*
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* Note that peer must indicate that he wants to be selected
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* for read and/or write using isrv_want_rd()/isrv_want_wr()
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* [can be called in new_peer() or in do_rd()/do_wr()].
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* If it never wants to be selected for write, do_wr()
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* will never be called (can be NULL).
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*/
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void isrv_run(
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int listen_fd,
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int (*new_peer)(isrv_state_t *state, int fd),
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int (*do_rd)(int fd, void **),
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int (*do_wr)(int fd, void **),
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int (*do_timeout)(void **),
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int timeout,
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int linger_timeout
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);
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POP_SAVED_FUNCTION_VISIBILITY
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