diff options
Diffstat (limited to 'ipc/chromium/src/third_party/libevent/include/event2/listener.h')
-rw-r--r-- | ipc/chromium/src/third_party/libevent/include/event2/listener.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/ipc/chromium/src/third_party/libevent/include/event2/listener.h b/ipc/chromium/src/third_party/libevent/include/event2/listener.h new file mode 100644 index 0000000000..789a27c2aa --- /dev/null +++ b/ipc/chromium/src/third_party/libevent/include/event2/listener.h @@ -0,0 +1,192 @@ +/* + * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu> + * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef EVENT2_LISTENER_H_INCLUDED_ +#define EVENT2_LISTENER_H_INCLUDED_ + +#include <event2/visibility.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#include <event2/event.h> + +struct sockaddr; +struct evconnlistener; + +/** + A callback that we invoke when a listener has a new connection. + + @param listener The evconnlistener + @param fd The new file descriptor + @param addr The source address of the connection + @param socklen The length of addr + @param user_arg the pointer passed to evconnlistener_new() + */ +typedef void (*evconnlistener_cb)(struct evconnlistener *, evutil_socket_t, struct sockaddr *, int socklen, void *); + +/** + A callback that we invoke when a listener encounters a non-retriable error. + + @param listener The evconnlistener + @param user_arg the pointer passed to evconnlistener_new() + */ +typedef void (*evconnlistener_errorcb)(struct evconnlistener *, void *); + +/** Flag: Indicates that we should not make incoming sockets nonblocking + * before passing them to the callback. */ +#define LEV_OPT_LEAVE_SOCKETS_BLOCKING (1u<<0) +/** Flag: Indicates that freeing the listener should close the underlying + * socket. */ +#define LEV_OPT_CLOSE_ON_FREE (1u<<1) +/** Flag: Indicates that we should set the close-on-exec flag, if possible */ +#define LEV_OPT_CLOSE_ON_EXEC (1u<<2) +/** Flag: Indicates that we should disable the timeout (if any) between when + * this socket is closed and when we can listen again on the same port. */ +#define LEV_OPT_REUSEABLE (1u<<3) +/** Flag: Indicates that the listener should be locked so it's safe to use + * from multiple threadcs at once. */ +#define LEV_OPT_THREADSAFE (1u<<4) +/** Flag: Indicates that the listener should be created in disabled + * state. Use evconnlistener_enable() to enable it later. */ +#define LEV_OPT_DISABLED (1u<<5) +/** Flag: Indicates that the listener should defer accept() until data is + * available, if possible. Ignored on platforms that do not support this. + * + * This option can help performance for protocols where the client transmits + * immediately after connecting. Do not use this option if your protocol + * _doesn't_ start out with the client transmitting data, since in that case + * this option will sometimes cause the kernel to never tell you about the + * connection. + * + * This option is only supported by evconnlistener_new_bind(): it can't + * work with evconnlistener_new_fd(), since the listener needs to be told + * to use the option before it is actually bound. + */ +#define LEV_OPT_DEFERRED_ACCEPT (1u<<6) +/** Flag: Indicates that we ask to allow multiple servers (processes or + * threads) to bind to the same port if they each set the option. + * + * SO_REUSEPORT is what most people would expect SO_REUSEADDR to be, however + * SO_REUSEPORT does not imply SO_REUSEADDR. + * + * This is only available on Linux and kernel 3.9+ + */ +#define LEV_OPT_REUSEABLE_PORT (1u<<7) +/** Flag: Indicates that the listener wants to work only in IPv6 socket. + * + * According to RFC3493 and most Linux distributions, default value is to + * work in IPv4-mapped mode. If there is a requirement to bind same port + * on same ip addresses but different handlers for both IPv4 and IPv6, + * it is required to set IPV6_V6ONLY socket option to be sure that the + * code works as expected without affected by bindv6only sysctl setting in + * system. + * + * This socket option also supported by Windows. + */ +#define LEV_OPT_BIND_IPV6ONLY (1u<<8) + +/** + Allocate a new evconnlistener object to listen for incoming TCP connections + on a given file descriptor. + + @param base The event base to associate the listener with. + @param cb A callback to be invoked when a new connection arrives. If the + callback is NULL, the listener will be treated as disabled until the + callback is set. + @param ptr A user-supplied pointer to give to the callback. + @param flags Any number of LEV_OPT_* flags + @param backlog Passed to the listen() call to determine the length of the + acceptable connection backlog. Set to -1 for a reasonable default. + Set to 0 if the socket is already listening. + @param fd The file descriptor to listen on. It must be a nonblocking + file descriptor, and it should already be bound to an appropriate + port and address. +*/ +EVENT2_EXPORT_SYMBOL +struct evconnlistener *evconnlistener_new(struct event_base *base, + evconnlistener_cb cb, void *ptr, unsigned flags, int backlog, + evutil_socket_t fd); +/** + Allocate a new evconnlistener object to listen for incoming TCP connections + on a given address. + + @param base The event base to associate the listener with. + @param cb A callback to be invoked when a new connection arrives. If the + callback is NULL, the listener will be treated as disabled until the + callback is set. + @param ptr A user-supplied pointer to give to the callback. + @param flags Any number of LEV_OPT_* flags + @param backlog Passed to the listen() call to determine the length of the + acceptable connection backlog. Set to -1 for a reasonable default. + @param addr The address to listen for connections on. + @param socklen The length of the address. + */ +EVENT2_EXPORT_SYMBOL +struct evconnlistener *evconnlistener_new_bind(struct event_base *base, + evconnlistener_cb cb, void *ptr, unsigned flags, int backlog, + const struct sockaddr *sa, int socklen); +/** + Disable and deallocate an evconnlistener. + */ +EVENT2_EXPORT_SYMBOL +void evconnlistener_free(struct evconnlistener *lev); +/** + Re-enable an evconnlistener that has been disabled. + */ +EVENT2_EXPORT_SYMBOL +int evconnlistener_enable(struct evconnlistener *lev); +/** + Stop listening for connections on an evconnlistener. + */ +EVENT2_EXPORT_SYMBOL +int evconnlistener_disable(struct evconnlistener *lev); + +/** Return an evconnlistener's associated event_base. */ +EVENT2_EXPORT_SYMBOL +struct event_base *evconnlistener_get_base(struct evconnlistener *lev); + +/** Return the socket that an evconnlistner is listening on. */ +EVENT2_EXPORT_SYMBOL +evutil_socket_t evconnlistener_get_fd(struct evconnlistener *lev); + +/** Change the callback on the listener to cb and its user_data to arg. + */ +EVENT2_EXPORT_SYMBOL +void evconnlistener_set_cb(struct evconnlistener *lev, + evconnlistener_cb cb, void *arg); + +/** Set an evconnlistener's error callback. */ +EVENT2_EXPORT_SYMBOL +void evconnlistener_set_error_cb(struct evconnlistener *lev, + evconnlistener_errorcb errorcb); + +#ifdef __cplusplus +} +#endif + +#endif |