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66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include "config.h"
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#include <stddef.h>
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struct brei_message {
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const char *data;
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size_t len;
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};
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/**
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* Return the first file descriptor passed along with this message, or -1.
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* You must only call this when a message is supposed to have an fd.
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*
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* Brei can not determine which message an fd belongs to, hence calling this
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* function for a non-fd-carrying message will take that fd away from the
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* message that fd actually belongs to.
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*/
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int
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brei_message_take_fd(struct brei_message *b);
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/**
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* Dispatch messages for the data on fd.
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* The callback is called for each protocol message, parsing must be done by
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* the caller.
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*
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* On success, the callback must return the number of bytes consumed in msgdata
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* On failure, the callback must return a negative errno
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*
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* @return zero on success or a negative errno otherwise
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*/
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int
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brei_dispatch(int fd,
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int (*callback)(struct brei_message *msg, void *userdata),
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void *user_data);
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/**
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* Drain all pending content from the file descriptor and discard it.
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*/
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void
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brei_drain_fd(int fd);
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