/* * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu> * Copyright (c) 2008 Marc Alexander Lehmann <libev@schmorp.de> * All rights reserved. * * 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. */ #ifdef __cplusplus extern "C" { #endif #ifdef _WIN32 # define WIN32_LEAN_AND_MEAN # include <windows.h> # undef WIN32_LEAN_AND_MEAN typedef unsigned char u_char; typedef unsigned short u_short; #else # include <sys/types.h> # include <sys/time.h> # include <inttypes.h> #endif #include <stdarg.h> /* Fix so that ppl dont have to run with <sys/queue.h> */ #ifndef TAILQ_ENTRY #define _EVENT_DEFINED_TQENTRY #define TAILQ_ENTRY(type) \ struct { \ struct type *tqe_next; /* next element */ \ struct type **tqe_prev; /* address of previous next element */ \ } #endif /* !TAILQ_ENTRY */ #ifndef RB_ENTRY #define _EVENT_DEFINED_RBENTRY #define RB_ENTRY(type) \ struct { \ struct type *rbe_left; /* left element */ \ struct type *rbe_right; /* right element */ \ struct type *rbe_parent; /* parent element */ \ int rbe_color; /* node color */ \ } #endif /* !RB_ENTRY */ /* * Key-Value pairs. Can be used for HTTP headers but also for * query argument parsing. */ struct evkeyval { TAILQ_ENTRY(evkeyval) next; char *key; char *value; }; #ifdef _EVENT_DEFINED_TQENTRY #undef TAILQ_ENTRY struct event_list; struct evkeyvalq; #undef _EVENT_DEFINED_TQENTRY #else TAILQ_HEAD (event_list, event); TAILQ_HEAD (evkeyvalq, evkeyval); #endif /* _EVENT_DEFINED_TQENTRY */ #ifdef _EVENT_DEFINED_RBENTRY #undef RB_ENTRY #undef _EVENT_DEFINED_RBENTRY #endif /* _EVENT_DEFINED_RBENTRY */ struct eventop { char *name; void *(*init)(struct event_base *); int (*add)(void *, struct event *); int (*del)(void *, struct event *); int (*recalc)(struct event_base *, void *, int); int (*dispatch)(struct event_base *, void *, struct timeval *); void (*dealloc)(struct event_base *, void *); }; /* These functions deal with buffering input and output */ struct evbuffer { u_char *buffer; u_char *orig_buffer; size_t misalign; size_t totallen; size_t off; void (*cb)(struct evbuffer *, size_t, size_t, void *); void *cbarg; }; /* Just for error reporting - use other constants otherwise */ #define EVBUFFER_READ 0x01 #define EVBUFFER_WRITE 0x02 #define EVBUFFER_EOF 0x10 #define EVBUFFER_ERROR 0x20 #define EVBUFFER_TIMEOUT 0x40 struct bufferevent; typedef void (*evbuffercb)(struct bufferevent *, void *); typedef void (*everrorcb)(struct bufferevent *, short what, void *); struct event_watermark { size_t low; size_t high; }; struct bufferevent { struct event ev_read; struct event ev_write; struct evbuffer *input; struct evbuffer *output; struct event_watermark wm_read; struct event_watermark wm_write; evbuffercb readcb; evbuffercb writecb; everrorcb errorcb; void *cbarg; int timeout_read; /* in seconds */ int timeout_write; /* in seconds */ short enabled; /* events that are currently enabled */ }; struct bufferevent *bufferevent_new(int fd, evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg); int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev); int bufferevent_priority_set(struct bufferevent *bufev, int pri); void bufferevent_free(struct bufferevent *bufev); int bufferevent_write(struct bufferevent *bufev, const void *data, size_t size); int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf); size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size); int bufferevent_enable(struct bufferevent *bufev, short event); int bufferevent_disable(struct bufferevent *bufev, short event); void bufferevent_settimeout(struct bufferevent *bufev, int timeout_read, int timeout_write); #define EVBUFFER_LENGTH(x) (x)->off #define EVBUFFER_DATA(x) (x)->buffer #define EVBUFFER_INPUT(x) (x)->input #define EVBUFFER_OUTPUT(x) (x)->output struct evbuffer *evbuffer_new(void); void evbuffer_free(struct evbuffer *); int evbuffer_expand(struct evbuffer *, size_t); int evbuffer_add(struct evbuffer *, const void *, size_t); int evbuffer_remove(struct evbuffer *, void *, size_t); char *evbuffer_readline(struct evbuffer *); int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *); int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...); int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap); void evbuffer_drain(struct evbuffer *, size_t); int evbuffer_write(struct evbuffer *, int); int evbuffer_read(struct evbuffer *, int, int); u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t); void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *); /* * Marshaling tagged data - We assume that all tags are inserted in their * numeric order - so that unknown tags will always be higher than the * known ones - and we can just ignore the end of an event buffer. */ void evtag_init(void); void evtag_marshal(struct evbuffer *evbuf, uint32_t tag, const void *data, uint32_t len); void encode_int(struct evbuffer *evbuf, uint32_t number); void evtag_marshal_int(struct evbuffer *evbuf, uint32_t tag, uint32_t integer); void evtag_marshal_string(struct evbuffer *buf, uint32_t tag, const char *string); void evtag_marshal_timeval(struct evbuffer *evbuf, uint32_t tag, struct timeval *tv); int evtag_unmarshal(struct evbuffer *src, uint32_t *ptag, struct evbuffer *dst); int evtag_peek(struct evbuffer *evbuf, uint32_t *ptag); int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength); int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength); int evtag_consume(struct evbuffer *evbuf); int evtag_unmarshal_int(struct evbuffer *evbuf, uint32_t need_tag, uint32_t *pinteger); int evtag_unmarshal_fixed(struct evbuffer *src, uint32_t need_tag, void *data, size_t len); int evtag_unmarshal_string(struct evbuffer *evbuf, uint32_t need_tag, char **pstring); int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint32_t need_tag, struct timeval *ptv); #ifdef __cplusplus } #endif