/* Copyright (c) 2012, Matthias Schiffer Partly based on QuickTun Copyright (c) 2010, Ivo Smits . 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. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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. */ #define _GNU_SOURCE #include "fastd.h" #include "task.h" #include "peer.h" #include static void protocol_init(fastd_context *ctx, fastd_config *conf) { if (conf->n_floating > 1) exit_error(ctx, "with protocol `null' use can't define more than one floating peer"); } static size_t protocol_max_packet_size(fastd_context *ctx) { return fastd_max_packet_size(ctx); } static size_t protocol_min_head_space(fastd_context *ctx) { return 0; } static void protocol_init_peer(fastd_context *ctx, fastd_peer *peer) { pr_info(ctx, "Connection with %P established.", peer); if (!fastd_peer_is_temporary(peer)) fastd_task_put_send(ctx, peer, fastd_buffer_alloc(0, 0, 0)); } static void protocol_handle_recv(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer) { if (!fastd_peer_is_established(peer)) { pr_info(ctx, "Connection with %P established.", peer); fastd_peer_set_established(ctx, peer); } if (fastd_peer_is_temporary(peer)) { fastd_peer *perm_peer; for (perm_peer = ctx->peers; perm_peer; perm_peer = perm_peer->next) { if (fastd_peer_is_floating(perm_peer)) break; } if (!perm_peer) { fastd_buffer_free(buffer); return; } peer = fastd_peer_merge(ctx, perm_peer, peer); } if (buffer.len) fastd_task_put_handle_recv(ctx, peer, buffer); else fastd_buffer_free(buffer); } static void protocol_send(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer) { fastd_task_put_send(ctx, peer, buffer); } static void protocol_free_peer_state(fastd_context *ctx, fastd_peer *peer) { } const fastd_protocol fastd_protocol_null = { .name = "null", .init = protocol_init, .max_packet_size = protocol_max_packet_size, .min_encrypt_head_space = protocol_min_head_space, .min_decrypt_head_space = protocol_min_head_space, .init_peer = protocol_init_peer, .handle_recv = protocol_handle_recv, .send = protocol_send, .free_peer_state = protocol_free_peer_state, };