diff options
Diffstat (limited to 'fluent-bit/lib/monkey/mk_core/deps/libevent/event_tagging.c')
-rw-r--r-- | fluent-bit/lib/monkey/mk_core/deps/libevent/event_tagging.c | 605 |
1 files changed, 0 insertions, 605 deletions
diff --git a/fluent-bit/lib/monkey/mk_core/deps/libevent/event_tagging.c b/fluent-bit/lib/monkey/mk_core/deps/libevent/event_tagging.c deleted file mode 100644 index 6459dfa72..000000000 --- a/fluent-bit/lib/monkey/mk_core/deps/libevent/event_tagging.c +++ /dev/null @@ -1,605 +0,0 @@ -/* - * Copyright (c) 2003-2009 Niels Provos <provos@citi.umich.edu> - * Copyright (c) 2009-2012 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. - */ - -#include "event2/event-config.h" -#include "evconfig-private.h" - -#ifdef EVENT__HAVE_SYS_TYPES_H -#include <sys/types.h> -#endif -#ifdef EVENT__HAVE_SYS_PARAM_H -#include <sys/param.h> -#endif - -#ifdef _WIN32 -#define WIN32_LEAN_AND_MEAN -#include <winsock2.h> -#include <windows.h> -#undef WIN32_LEAN_AND_MEAN -#endif - -#ifdef EVENT__HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif -#include <sys/queue.h> -#ifdef EVENT__HAVE_SYS_TIME_H -#include <sys/time.h> -#endif - -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#ifndef _WIN32 -#include <syslog.h> -#endif -#ifdef EVENT__HAVE_UNISTD_H -#include <unistd.h> -#endif -#include <limits.h> - -#include "event2/event.h" -#include "event2/tag.h" -#include "event2/buffer.h" -#include "log-internal.h" -#include "mm-internal.h" -#include "util-internal.h" - -/* - Here's our wire format: - - Stream = TaggedData* - - TaggedData = Tag Length Data - where the integer value of 'Length' is the length of 'data'. - - Tag = HByte* LByte - where HByte is a byte with the high bit set, and LByte is a byte - with the high bit clear. The integer value of the tag is taken - by concatenating the lower 7 bits from all the tags. So for example, - the tag 0x66 is encoded as [66], whereas the tag 0x166 is encoded as - [82 66] - - Length = Integer - - Integer = NNibbles Nibble* Padding? - where NNibbles is a 4-bit value encoding the number of nibbles-1, - and each Nibble is 4 bits worth of encoded integer, in big-endian - order. If the total encoded integer size is an odd number of nibbles, - a final padding nibble with value 0 is appended. -*/ - -int evtag_decode_int(ev_uint32_t *pnumber, struct evbuffer *evbuf); -int evtag_decode_int64(ev_uint64_t *pnumber, struct evbuffer *evbuf); -int evtag_encode_tag(struct evbuffer *evbuf, ev_uint32_t tag); -int evtag_decode_tag(ev_uint32_t *ptag, struct evbuffer *evbuf); - -void -evtag_init(void) -{ -} - -/* - * We encode integers by nibbles; the first nibble contains the number - * of significant nibbles - 1; this allows us to encode up to 64-bit - * integers. This function is byte-order independent. - * - * @param number a 32-bit unsigned integer to encode - * @param data a pointer to where the data should be written. Must - * have at least 5 bytes free. - * @return the number of bytes written into data. - */ - -#define ENCODE_INT_INTERNAL(data, number) do { \ - int off = 1, nibbles = 0; \ - \ - memset(data, 0, sizeof(number)+1); \ - while (number) { \ - if (off & 0x1) \ - data[off/2] = (data[off/2] & 0xf0) | (number & 0x0f); \ - else \ - data[off/2] = (data[off/2] & 0x0f) | \ - ((number & 0x0f) << 4); \ - number >>= 4; \ - off++; \ - } \ - \ - if (off > 2) \ - nibbles = off - 2; \ - \ - /* Off - 1 is the number of encoded nibbles */ \ - data[0] = (data[0] & 0x0f) | ((nibbles & 0x0f) << 4); \ - \ - return ((off + 1) / 2); \ -} while (0) - -static inline int -encode_int_internal(ev_uint8_t *data, ev_uint32_t number) -{ - ENCODE_INT_INTERNAL(data, number); -} - -static inline int -encode_int64_internal(ev_uint8_t *data, ev_uint64_t number) -{ - ENCODE_INT_INTERNAL(data, number); -} - -void -evtag_encode_int(struct evbuffer *evbuf, ev_uint32_t number) -{ - ev_uint8_t data[5]; - int len = encode_int_internal(data, number); - evbuffer_add(evbuf, data, len); -} - -void -evtag_encode_int64(struct evbuffer *evbuf, ev_uint64_t number) -{ - ev_uint8_t data[9]; - int len = encode_int64_internal(data, number); - evbuffer_add(evbuf, data, len); -} - -/* - * Support variable length encoding of tags; we use the high bit in each - * octet as a continuation signal. - */ - -int -evtag_encode_tag(struct evbuffer *evbuf, ev_uint32_t tag) -{ - int bytes = 0; - ev_uint8_t data[5]; - - memset(data, 0, sizeof(data)); - do { - ev_uint8_t lower = tag & 0x7f; - tag >>= 7; - - if (tag) - lower |= 0x80; - - data[bytes++] = lower; - } while (tag); - - if (evbuf != NULL) - evbuffer_add(evbuf, data, bytes); - - return (bytes); -} - -static int -decode_tag_internal(ev_uint32_t *ptag, struct evbuffer *evbuf, int dodrain) -{ - ev_uint32_t number = 0; - size_t len = evbuffer_get_length(evbuf); - ev_uint8_t *data; - size_t count = 0; - int shift = 0, done = 0; - - /* - * the encoding of a number is at most one byte more than its - * storage size. however, it may also be much smaller. - */ - data = evbuffer_pullup( - evbuf, len < sizeof(number) + 1 ? len : sizeof(number) + 1); - if (!data) - return (-1); - - while (count++ < len) { - ev_uint8_t lower = *data++; - if (shift >= 28) { - /* Make sure it fits into 32 bits */ - if (shift > 28) - return (-1); - if ((lower & 0x7f) > 15) - return (-1); - } - number |= (lower & (unsigned)0x7f) << shift; - shift += 7; - - if (!(lower & 0x80)) { - done = 1; - break; - } - } - - if (!done) - return (-1); - - if (dodrain) - evbuffer_drain(evbuf, count); - - if (ptag != NULL) - *ptag = number; - - return count > INT_MAX ? INT_MAX : (int)(count); -} - -int -evtag_decode_tag(ev_uint32_t *ptag, struct evbuffer *evbuf) -{ - return (decode_tag_internal(ptag, evbuf, 1 /* dodrain */)); -} - -/* - * Marshal a data type, the general format is as follows: - * - * tag number: one byte; length: var bytes; payload: var bytes - */ - -void -evtag_marshal(struct evbuffer *evbuf, ev_uint32_t tag, - const void *data, ev_uint32_t len) -{ - evtag_encode_tag(evbuf, tag); - evtag_encode_int(evbuf, len); - evbuffer_add(evbuf, (void *)data, len); -} - -void -evtag_marshal_buffer(struct evbuffer *evbuf, ev_uint32_t tag, - struct evbuffer *data) -{ - evtag_encode_tag(evbuf, tag); - /* XXX support more than UINT32_MAX data */ - evtag_encode_int(evbuf, (ev_uint32_t)evbuffer_get_length(data)); - evbuffer_add_buffer(evbuf, data); -} - -/* Marshaling for integers */ -void -evtag_marshal_int(struct evbuffer *evbuf, ev_uint32_t tag, ev_uint32_t integer) -{ - ev_uint8_t data[5]; - int len = encode_int_internal(data, integer); - - evtag_encode_tag(evbuf, tag); - evtag_encode_int(evbuf, len); - evbuffer_add(evbuf, data, len); -} - -void -evtag_marshal_int64(struct evbuffer *evbuf, ev_uint32_t tag, - ev_uint64_t integer) -{ - ev_uint8_t data[9]; - int len = encode_int64_internal(data, integer); - - evtag_encode_tag(evbuf, tag); - evtag_encode_int(evbuf, len); - evbuffer_add(evbuf, data, len); -} - -void -evtag_marshal_string(struct evbuffer *buf, ev_uint32_t tag, const char *string) -{ - /* TODO support strings longer than UINT32_MAX ? */ - evtag_marshal(buf, tag, string, (ev_uint32_t)strlen(string)); -} - -void -evtag_marshal_timeval(struct evbuffer *evbuf, ev_uint32_t tag, struct timeval *tv) -{ - ev_uint8_t data[10]; - int len = encode_int_internal(data, tv->tv_sec); - len += encode_int_internal(data + len, tv->tv_usec); - evtag_marshal(evbuf, tag, data, len); -} - -#define DECODE_INT_INTERNAL(number, maxnibbles, pnumber, evbuf, offset) \ -do { \ - ev_uint8_t *data; \ - ev_ssize_t len = evbuffer_get_length(evbuf) - offset; \ - int nibbles = 0; \ - \ - if (len <= 0) \ - return (-1); \ - \ - /* XXX(niels): faster? */ \ - data = evbuffer_pullup(evbuf, offset + 1) + offset; \ - if (!data) \ - return (-1); \ - \ - nibbles = ((data[0] & 0xf0) >> 4) + 1; \ - if (nibbles > maxnibbles || (nibbles >> 1) + 1 > len) \ - return (-1); \ - len = (nibbles >> 1) + 1; \ - \ - data = evbuffer_pullup(evbuf, offset + len) + offset; \ - if (!data) \ - return (-1); \ - \ - while (nibbles > 0) { \ - number <<= 4; \ - if (nibbles & 0x1) \ - number |= data[nibbles >> 1] & 0x0f; \ - else \ - number |= (data[nibbles >> 1] & 0xf0) >> 4; \ - nibbles--; \ - } \ - \ - *pnumber = number; \ - \ - return (int)(len); \ -} while (0) - -/* Internal: decode an integer from an evbuffer, without draining it. - * Only integers up to 32-bits are supported. - * - * @param evbuf the buffer to read from - * @param offset an index into the buffer at which we should start reading. - * @param pnumber a pointer to receive the integer. - * @return The length of the number as encoded, or -1 on error. - */ - -static int -decode_int_internal(ev_uint32_t *pnumber, struct evbuffer *evbuf, int offset) -{ - ev_uint32_t number = 0; - DECODE_INT_INTERNAL(number, 8, pnumber, evbuf, offset); -} - -static int -decode_int64_internal(ev_uint64_t *pnumber, struct evbuffer *evbuf, int offset) -{ - ev_uint64_t number = 0; - DECODE_INT_INTERNAL(number, 16, pnumber, evbuf, offset); -} - -int -evtag_decode_int(ev_uint32_t *pnumber, struct evbuffer *evbuf) -{ - int res = decode_int_internal(pnumber, evbuf, 0); - if (res != -1) - evbuffer_drain(evbuf, res); - - return (res == -1 ? -1 : 0); -} - -int -evtag_decode_int64(ev_uint64_t *pnumber, struct evbuffer *evbuf) -{ - int res = decode_int64_internal(pnumber, evbuf, 0); - if (res != -1) - evbuffer_drain(evbuf, res); - - return (res == -1 ? -1 : 0); -} - -int -evtag_peek(struct evbuffer *evbuf, ev_uint32_t *ptag) -{ - return (decode_tag_internal(ptag, evbuf, 0 /* dodrain */)); -} - -int -evtag_peek_length(struct evbuffer *evbuf, ev_uint32_t *plength) -{ - int res, len; - - len = decode_tag_internal(NULL, evbuf, 0 /* dodrain */); - if (len == -1) - return (-1); - - res = decode_int_internal(plength, evbuf, len); - if (res == -1) - return (-1); - - *plength += res + len; - - return (0); -} - -int -evtag_payload_length(struct evbuffer *evbuf, ev_uint32_t *plength) -{ - int res, len; - - len = decode_tag_internal(NULL, evbuf, 0 /* dodrain */); - if (len == -1) - return (-1); - - res = decode_int_internal(plength, evbuf, len); - if (res == -1) - return (-1); - - return (0); -} - -/* just unmarshals the header and returns the length of the remaining data */ - -int -evtag_unmarshal_header(struct evbuffer *evbuf, ev_uint32_t *ptag) -{ - ev_uint32_t len; - - if (decode_tag_internal(ptag, evbuf, 1 /* dodrain */) == -1) - return (-1); - if (evtag_decode_int(&len, evbuf) == -1) - return (-1); - - if (evbuffer_get_length(evbuf) < len) - return (-1); - - return (len); -} - -int -evtag_consume(struct evbuffer *evbuf) -{ - int len; - if ((len = evtag_unmarshal_header(evbuf, NULL)) == -1) - return (-1); - evbuffer_drain(evbuf, len); - - return (0); -} - -/* Reads the data type from an event buffer */ - -int -evtag_unmarshal(struct evbuffer *src, ev_uint32_t *ptag, struct evbuffer *dst) -{ - int len; - - if ((len = evtag_unmarshal_header(src, ptag)) == -1) - return (-1); - - if (evbuffer_add(dst, evbuffer_pullup(src, len), len) == -1) - return (-1); - - evbuffer_drain(src, len); - - return (len); -} - -/* Marshaling for integers */ - -int -evtag_unmarshal_int(struct evbuffer *evbuf, ev_uint32_t need_tag, - ev_uint32_t *pinteger) -{ - ev_uint32_t tag; - ev_uint32_t len; - int result; - - if (decode_tag_internal(&tag, evbuf, 1 /* dodrain */) == -1) - return (-1); - if (need_tag != tag) - return (-1); - if (evtag_decode_int(&len, evbuf) == -1) - return (-1); - - if (evbuffer_get_length(evbuf) < len) - return (-1); - - result = decode_int_internal(pinteger, evbuf, 0); - evbuffer_drain(evbuf, len); - if (result < 0 || (size_t)result > len) /* XXX Should this be != rather than > ?*/ - return (-1); - else - return result; -} - -int -evtag_unmarshal_int64(struct evbuffer *evbuf, ev_uint32_t need_tag, - ev_uint64_t *pinteger) -{ - ev_uint32_t tag; - ev_uint32_t len; - int result; - - if (decode_tag_internal(&tag, evbuf, 1 /* dodrain */) == -1) - return (-1); - if (need_tag != tag) - return (-1); - if (evtag_decode_int(&len, evbuf) == -1) - return (-1); - - if (evbuffer_get_length(evbuf) < len) - return (-1); - - result = decode_int64_internal(pinteger, evbuf, 0); - evbuffer_drain(evbuf, len); - if (result < 0 || (size_t)result > len) /* XXX Should this be != rather than > ?*/ - return (-1); - else - return result; -} - -/* Unmarshal a fixed length tag */ - -int -evtag_unmarshal_fixed(struct evbuffer *src, ev_uint32_t need_tag, void *data, - size_t len) -{ - ev_uint32_t tag; - int tag_len; - - /* Now unmarshal a tag and check that it matches the tag we want */ - if ((tag_len = evtag_unmarshal_header(src, &tag)) < 0 || - tag != need_tag) - return (-1); - - if ((size_t)tag_len != len) - return (-1); - - evbuffer_remove(src, data, len); - return (0); -} - -int -evtag_unmarshal_string(struct evbuffer *evbuf, ev_uint32_t need_tag, - char **pstring) -{ - ev_uint32_t tag; - int tag_len; - - if ((tag_len = evtag_unmarshal_header(evbuf, &tag)) == -1 || - tag != need_tag) - return (-1); - - *pstring = mm_malloc(tag_len + 1); - if (*pstring == NULL) { - event_warn("%s: malloc", __func__); - return -1; - } - evbuffer_remove(evbuf, *pstring, tag_len); - (*pstring)[tag_len] = '\0'; - - return (0); -} - -int -evtag_unmarshal_timeval(struct evbuffer *evbuf, ev_uint32_t need_tag, - struct timeval *ptv) -{ - ev_uint32_t tag; - ev_uint32_t integer; - int len, offset, offset2; - int result = -1; - - if ((len = evtag_unmarshal_header(evbuf, &tag)) == -1) - return (-1); - if (tag != need_tag) - goto done; - if ((offset = decode_int_internal(&integer, evbuf, 0)) == -1) - goto done; - ptv->tv_sec = integer; - if ((offset2 = decode_int_internal(&integer, evbuf, offset)) == -1) - goto done; - ptv->tv_usec = integer; - if (offset + offset2 > len) /* XXX Should this be != instead of > ? */ - goto done; - - result = 0; - done: - evbuffer_drain(evbuf, len); - return result; -} |