/* * Ouroboros - Copyright (C) 2016 - 2017 * * The Common Application Connection Establishment Protocol * * Dimitri Staessens <dimitri.staessens@ugent.be> * Sander Vrijders <sander.vrijders@ugent.be> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * version 2.1 as published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., http://www.fsf.org/about/contact/. */ #define _POSIX_C_SOURCE 199309L #include <ouroboros/cacep.h> #include <ouroboros/dev.h> #include <ouroboros/errno.h> #include <stdlib.h> #include <string.h> #include "cacep.pb-c.h" typedef CacepMsg cacep_msg_t; #define BUF_SIZE 64 static int read_msg(int fd, struct conn_info * info) { uint8_t buf[BUF_SIZE]; cacep_msg_t * msg; ssize_t len; len = flow_read(fd, buf, BUF_SIZE); if (len < 0) return -1; msg = cacep_msg__unpack(NULL, len, buf); if (msg == NULL) return -1; strcpy(info->ae_name, msg->ae_name); strcpy(info->protocol, msg->protocol); info->pref_version = msg->pref_version; info->pref_syntax = msg->pref_syntax; info->addr = msg->address; cacep_msg__free_unpacked(msg, NULL); return 0; } static int send_msg(int fd, const struct conn_info * info) { cacep_msg_t msg = CACEP_MSG__INIT; uint8_t * data = NULL; size_t len = 0; msg.ae_name = (char *) info->ae_name; msg.protocol = (char *) info->protocol; msg.address = info->addr; msg.pref_version = info->pref_version; msg.pref_syntax = info->pref_syntax; if (msg.pref_syntax < 0) return -1; len = cacep_msg__get_packed_size(&msg); if (len == 0) return -1; data = malloc(len); if (data == NULL) return -ENOMEM; cacep_msg__pack(&msg, data); if (flow_write(fd, data, len) < 0) { free(data); return -1; } free(data); return 0; } int cacep_snd(int fd, const struct conn_info * in) { if (in == NULL) return -EINVAL; if (send_msg(fd, in)) return -1; return 0; } int cacep_rcv(int fd, struct conn_info * out) { if (out == NULL) return -EINVAL; if (read_msg(fd, out)) return -1; return 0; }