ml / ml.c @ 8fed9f23
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/*
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* Policy Management
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*
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* NEC Europe Ltd. PROPRIETARY INFORMATION
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*
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* This software is supplied under the terms of a license agreement
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* or nondisclosure agreement with NEC Europe Ltd. and may not be
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* copied or disclosed except in accordance with the terms of that
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* agreement.
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*
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* Copyright (c) 2009 NEC Europe Ltd. All Rights Reserved.
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*
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* Authors: Kristian Beckers <beckers@nw.neclab.eu>
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* Sebastian Kiesel <kiesel@nw.neclab.eu>
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*
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*
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* NEC Europe Ltd. DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE AND THE WARRANTY AGAINST LATENT
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* DEFECTS, WITH RESPECT TO THE PROGRAM AND THE ACCOMPANYING
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* DOCUMENTATION.
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*
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* No Liability For Consequential Damages IN NO EVENT SHALL NEC Europe
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* Ltd., NEC Corporation OR ANY OF ITS SUBSIDIARIES BE LIABLE FOR ANY
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* DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS
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* OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF INFORMATION, OR
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* OTHER PECUNIARY LOSS AND INDIRECT, CONSEQUENTIAL, INCIDENTAL,
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* ECONOMIC OR PUNITIVE DAMAGES) ARISING OUT OF THE USE OF OR INABILITY
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* TO USE THIS PROGRAM, EVEN IF NEC Europe Ltd. HAS BEEN ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
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*/
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#include <arpa/inet.h> |
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#ifndef WIN32
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#include <netinet/in.h> |
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#include <sys/socket.h> |
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#endif
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#include <fcntl.h> |
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#include <event2/event.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <stddef.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <arpa/inet.h> |
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#include <netdb.h> |
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#include <errno.h> |
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#include <time.h> |
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#include <math.h> |
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#include <assert.h> |
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#include "msg_types.h" |
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#include "util/udpSocket.h" |
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#include "util/stun.h" |
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#include "transmissionHandler.h" |
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#define LOG_MODULE "[ml] " |
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#include "ml_log.h" |
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/**************************** START OF INTERNALS ***********************/
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/*
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* a pointer to a libevent instance
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*/
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struct event_base *base;
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/*
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* define the nr of connections the messaging layer can handle
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*/
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#define CONNECTBUFSIZE 10000 |
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/*
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* define the nr of data that can be received parallel
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*/
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#define RECVDATABUFSIZE 10000 |
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/*
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* define an array for message multiplexing
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*/
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#define MSGMULTIPLEXSIZE 127 |
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/*
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* timeout before thinking that the STUN server can't be connected
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*/
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#define NAT_TRAVERSAL_TIMEOUT { 1, 0 } |
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/*
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* timeout before thinking of an mtu problem (check MAX_TRIALS as well)
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*/
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#define PMTU_TIMEOUT { 0, 500000 } |
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/*
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* retry sending connection messages this many times before reducing pmtu
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*/
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#define MAX_TRIALS 3 |
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/*
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* default timeout value between the first and the last received packet of a message
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*/
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#define RECV_TIMEOUT_DEFAULT { 2, 0 } |
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/*
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* global variables
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*/
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/*
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* define a buffer of pointers to connect structures
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*/
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connect_data *connectbuf[CONNECTBUFSIZE]; |
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/*
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* define a pointer buffer with pointers to recv_data structures
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*/
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recvdata *recvdatabuf[RECVDATABUFSIZE]; |
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/*
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* define a pointer buffer for message multiplexing
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*/
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receive_data_cb recvcbbuf[MSGMULTIPLEXSIZE]; |
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/*
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* stun server address
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*/
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struct sockaddr_in stun_server;
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/*
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* receive timeout
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*/
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static struct timeval recv_timeout = RECV_TIMEOUT_DEFAULT; |
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/*
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* boolean NAT traversal successful if true
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*/
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boolean NAT_traversal; |
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/*
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* file descriptor for local socket
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*/
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evutil_socket_t socketfd; |
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/*
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* local socketID
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*/
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socket_ID local_socketID; |
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socketID_handle loc_socketID = &local_socketID; |
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/*
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* callback function pointers
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*/
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/*
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* monitoring module callbacks
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*/
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get_recv_pkt_inf_cb get_Recv_pkt_inf_cb = NULL;
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get_send_pkt_inf_cb get_Send_pkt_inf_cb = NULL;
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set_monitoring_header_pkt_cb set_Monitoring_header_pkt_cb = NULL;
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get_recv_data_inf_cb get_Recv_data_inf_cb = NULL;
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get_send_data_inf_cb get_Send_data_inf_cb = NULL;
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set_monitoring_header_data_cb set_Monitoring_header_data_cb = NULL;
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/*
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* connection callbacks
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*/
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receive_connection_cb receive_Connection_cb = NULL;
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connection_failed_cb failed_Connection_cb = NULL;
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/*
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* local socketID callback
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*/
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receive_localsocketID_cb receive_SocketID_cb; |
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/*
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* boolean that defines if received data is transmitted to the upper layer
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* via callback or via upper layer polling
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*/
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boolean recv_data_callback; |
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/*
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* helper function to get rid of a warning
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*/
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int min(int a, int b) { |
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if (a > b) return b; |
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return a;
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} |
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/*
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* convert a socketID to a string. It uses a static buffer, so either strdup is needed, or the string will get lost!
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*/
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const char *conid_to_string(int con_id) |
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{ |
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static char s[INET_ADDRSTRLEN+1+5+1+INET_ADDRSTRLEN+1+5+1]; |
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mlSocketIDToString(&connectbuf[con_id]->external_socketID, s, sizeof(s));
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return s;
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} |
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void register_recv_localsocketID_cb(receive_localsocketID_cb local_socketID_cb)
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{ |
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if (local_socketID_cb == NULL) |
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error("ML : Register receive_localsocketID_cb: NULL ptr \n");
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else
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receive_SocketID_cb = local_socketID_cb; |
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} |
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//void keep_connection_alive(const int connectionID)
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//{
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//
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// // to be done with the NAT traversal
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// // send a message over the wire
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// printf("\n");
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//
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//}
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void unsetStunServer()
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{ |
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stun_server.sin_addr.s_addr = INADDR_NONE; |
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} |
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bool isStunDefined()
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{ |
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return stun_server.sin_addr.s_addr != INADDR_NONE;
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} |
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void send_msg(int con_id, int msg_type, char* msg, int msg_len, bool truncable, send_params * sParams) { |
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socketaddrgen udpgen; |
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bool retry;
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int pkt_len, offset;
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struct iovec iov[4]; |
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char h_pkt[MON_PKT_HEADER_SPACE];
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char h_data[MON_DATA_HEADER_SPACE];
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struct msg_header msg_h;
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debug("ML: send_msg to %s conID:%d extID:%d\n", conid_to_string(con_id), con_id, connectbuf[con_id]->external_connectionID);
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iov[0].iov_base = &msg_h;
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iov[0].iov_len = MSG_HEADER_SIZE;
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msg_h.local_con_id = con_id; |
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msg_h.remote_con_id = connectbuf[con_id]->external_connectionID; |
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msg_h.msg_type = msg_type; |
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msg_h.msg_seq_num = connectbuf[con_id]->seqnr++; |
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iov[1].iov_len = iov[2].iov_len = 0; |
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iov[1].iov_base = h_pkt;
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iov[2].iov_base = h_data;
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if (connectbuf[con_id]->internal_connect)
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udpgen = connectbuf[con_id]->external_socketID.internal_addr; |
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else
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udpgen = connectbuf[con_id]->external_socketID.external_addr; |
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do{
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offset = 0;
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retry = false;
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// Monitoring layer hook
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if(set_Monitoring_header_data_cb != NULL) { |
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iov[2].iov_len = ((set_Monitoring_header_data_cb) (&(connectbuf[con_id]->external_socketID), msg_type));
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} |
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msg_h.len_mon_data_hdr = iov[2].iov_len;
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if(get_Send_data_inf_cb != NULL && iov[2].iov_len != 0) { |
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mon_data_inf sd_data_inf; |
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memset(h_data, 0, MON_DATA_HEADER_SPACE);
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sd_data_inf.remote_socketID = &(connectbuf[con_id]->external_socketID); |
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sd_data_inf.buffer = msg; |
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sd_data_inf.bufSize = msg_len; |
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sd_data_inf.msgtype = msg_type; |
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sd_data_inf.monitoringDataHeader = iov[2].iov_base;
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sd_data_inf.monitoringDataHeaderLen = iov[2].iov_len;
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sd_data_inf.priority = sParams->priority; |
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sd_data_inf.padding = sParams->padding; |
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sd_data_inf.confirmation = sParams->confirmation; |
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sd_data_inf.reliable = sParams->reliable; |
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memset(&sd_data_inf.arrival_time, 0, sizeof(struct timeval)); |
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(get_Send_data_inf_cb) ((void *) &sd_data_inf);
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} |
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do {
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if(set_Monitoring_header_pkt_cb != NULL) { |
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iov[1].iov_len = (set_Monitoring_header_pkt_cb) (&(connectbuf[con_id]->external_socketID), msg_type);
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} |
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pkt_len = min(connectbuf[con_id]->pmtusize - iov[2].iov_len - iov[1].iov_len - iov[0].iov_len, msg_len - offset) ; |
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iov[3].iov_len = pkt_len;
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iov[3].iov_base = msg + offset;
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//fill header
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msg_h.len_mon_packet_hdr = iov[1].iov_len;
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msg_h.offset = offset; |
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msg_h.msg_length = truncable ? pkt_len : msg_len; |
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//monitoring layer hook
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if(get_Send_pkt_inf_cb != NULL && iov[1].iov_len) { |
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mon_pkt_inf pkt_info; |
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memset(h_pkt,0,MON_PKT_HEADER_SPACE);
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pkt_info.remote_socketID = &(connectbuf[con_id]->external_socketID); |
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pkt_info.buffer = msg + offset; |
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pkt_info.bufSize = pkt_len; |
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pkt_info.msgtype = msg_type; |
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pkt_info.dataID = connectbuf[con_id]->seqnr; |
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pkt_info.offset = offset; |
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pkt_info.datasize = msg_len; |
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pkt_info.monitoringHeaderLen = iov[1].iov_len;
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pkt_info.monitoringHeader = iov[1].iov_base;
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pkt_info.ttl = -1;
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memset(&(pkt_info.arrival_time),0,sizeof(struct timeval)); |
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(get_Send_pkt_inf_cb) ((void *) &pkt_info);
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} |
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debug("ML: sending packet to %s with rconID:%d lconID:%d\n", conid_to_string(con_id), msg_h.remote_con_id, msg_h.local_con_id);
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switch(sendPacket(socketfd, iov, 4, &udpgen.udpaddr)) { |
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case MSGLEN:
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info("ML: sending message failed, reducing MTU from %d to %d (to:%s conID:%d lconID:%d msgsize:%d offset:%d)\n", connectbuf[con_id]->pmtusize, pmtu_decrement(connectbuf[con_id]->pmtusize), conid_to_string(con_id), msg_h.remote_con_id, msg_h.local_con_id, msg_len, offset);
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// TODO: pmtu decremented here, but not in the "truncable" packet. That is currently resent without changing the claimed pmtu. Might need to be changed.
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connectbuf[con_id]->pmtusize = pmtu_decrement(connectbuf[con_id]->pmtusize); |
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if (connectbuf[con_id]->pmtusize > 0) { |
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connectbuf[con_id]->delay = true;
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retry = true;
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} |
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offset = msg_len; // exit the while
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break;
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case FAILURE:
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info("ML: sending message failed (to:%s conID:%d lconID:%d msgsize:%d offset:%d)\n", conid_to_string(con_id), msg_h.remote_con_id, msg_h.local_con_id, msg_len, offset);
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offset = msg_len; // exit the while
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break;
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case OK:
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//update
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offset += pkt_len; |
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//transmit data header only in the first packet
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iov[2].iov_len = 0; |
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break;
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} |
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} while(offset != msg_len && !truncable);
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} while(retry);
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} |
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void pmtu_timeout_cb(int fd, short event, void *arg); |
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void reschedule_conn_msg(int con_id) |
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{ |
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if (connectbuf[con_id]->timeout_event) {
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/* delete old timout */
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event_del(connectbuf[con_id]->timeout_event); |
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event_free(connectbuf[con_id]->timeout_event); |
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} |
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connectbuf[con_id]->timeout_event = event_new(base, -1, EV_TIMEOUT, &pmtu_timeout_cb, (void *) (long)con_id); |
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evtimer_add(connectbuf[con_id]->timeout_event, &connectbuf[con_id]->timeout_value); |
358 |
} |
359 |
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void send_conn_msg(int con_id, int buf_size, int command_type) |
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{ |
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if (buf_size < sizeof(struct conn_msg)) { |
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error("ML: requested connection message size is too small\n");
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return;
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} |
366 |
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if(connectbuf[con_id]->ctrl_msg_buf == NULL) { |
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connectbuf[con_id]->ctrl_msg_buf = malloc(buf_size); |
369 |
memset(connectbuf[con_id]->ctrl_msg_buf, 0, buf_size);
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} |
371 |
|
372 |
if(connectbuf[con_id]->ctrl_msg_buf == NULL) { |
373 |
error("ML: can not allocate memory for connection message\n");
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return;
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} |
376 |
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struct conn_msg *msg_header = (struct conn_msg*) connectbuf[con_id]->ctrl_msg_buf; |
378 |
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msg_header->comand_type = command_type; |
380 |
msg_header->pmtu_size = connectbuf[con_id]->pmtusize; |
381 |
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memcpy(&(msg_header->sock_id), loc_socketID, sizeof(socket_ID));
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send_msg(con_id, ML_CON_MSG, connectbuf[con_id]->ctrl_msg_buf, buf_size, true, &(connectbuf[con_id]->defaultSendParams));
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} |
386 |
|
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void send_conn_msg_with_pmtu_discovery(int con_id, int buf_size, int command_type) |
388 |
{ |
389 |
struct timeval tout = PMTU_TIMEOUT;
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connectbuf[con_id]->timeout_value = tout; |
391 |
connectbuf[con_id]->trials = 1;
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send_conn_msg(con_id, buf_size, command_type); |
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reschedule_conn_msg(con_id); |
394 |
} |
395 |
|
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void resend_conn_msg(int con_id) |
397 |
{ |
398 |
connectbuf[con_id]->trials++; |
399 |
send_conn_msg(con_id, connectbuf[con_id]->pmtusize, connectbuf[con_id]->status); |
400 |
reschedule_conn_msg(con_id); |
401 |
} |
402 |
|
403 |
void recv_conn_msg(struct msg_header *msg_h, char *msgbuf, int msg_size, struct sockaddr_in *recv_addr) |
404 |
{ |
405 |
struct conn_msg *con_msg;
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406 |
int free_con_id, con_id;
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407 |
|
408 |
time_t now = time(NULL);
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409 |
double timediff = 0.0; |
410 |
char sock_id_str[1000]; |
411 |
|
412 |
msgbuf += msg_h->len_mon_data_hdr; |
413 |
msg_size -= msg_h->len_mon_data_hdr; |
414 |
con_msg = (struct conn_msg *)msgbuf;
|
415 |
|
416 |
//verify message validity
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417 |
if (msg_size < sizeof(struct conn_msg)) { |
418 |
char recv_addr_str[INET_ADDRSTRLEN];
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419 |
inet_ntop(AF_INET, &(recv_addr->sin_addr.s_addr), recv_addr_str, INET_ADDRSTRLEN); |
420 |
info("Invalid conn_msg received from %s\n", recv_addr_str);
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return;
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} |
423 |
|
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//decode sock_id for debug messages
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mlSocketIDToString(&con_msg->sock_id,sock_id_str,999);
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426 |
|
427 |
if (con_msg->sock_id.internal_addr.udpaddr.sin_addr.s_addr != recv_addr->sin_addr.s_addr &&
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con_msg->sock_id.external_addr.udpaddr.sin_addr.s_addr != recv_addr->sin_addr.s_addr ) { |
429 |
char recv_addr_str[INET_ADDRSTRLEN];
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inet_ntop(AF_INET, &(recv_addr->sin_addr.s_addr), recv_addr_str, INET_ADDRSTRLEN); |
431 |
info("Conn msg received from %s, but claims to be from %s", recv_addr_str, sock_id_str);
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return;
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} |
434 |
|
435 |
// Monitoring layer hook
|
436 |
if(get_Recv_data_inf_cb != NULL) { |
437 |
// update pointer to the real data
|
438 |
mon_data_inf recv_data_inf; |
439 |
recv_data_inf.remote_socketID = &(con_msg->sock_id); |
440 |
recv_data_inf.buffer = msgbuf; |
441 |
recv_data_inf.bufSize = msg_size; |
442 |
recv_data_inf.msgtype = msg_h->msg_type; |
443 |
recv_data_inf.monitoringDataHeaderLen = msg_h->len_mon_data_hdr; |
444 |
recv_data_inf.monitoringDataHeader = msg_h->len_mon_data_hdr ? msgbuf : NULL;
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gettimeofday(&recv_data_inf.arrival_time, NULL);
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recv_data_inf.firstPacketArrived = true;
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447 |
recv_data_inf.recvFragments = 1;
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448 |
recv_data_inf.priority = false;
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449 |
recv_data_inf.padding = false;
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450 |
recv_data_inf.confirmation = false;
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recv_data_inf.reliable = false;
|
452 |
|
453 |
// send data recv callback to monitoring module
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(get_Recv_data_inf_cb) ((void *) &recv_data_inf);
|
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} |
456 |
|
457 |
// check the connection command type
|
458 |
switch (con_msg->comand_type) {
|
459 |
/*
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460 |
* if INVITE: enter a new socket make new entry in connect array
|
461 |
* send an ok
|
462 |
*/
|
463 |
case INVITE:
|
464 |
info("ML: received INVITE from %s (size:%d)\n", sock_id_str, msg_size);
|
465 |
/*
|
466 |
* check if another connection for the external connectionID exist
|
467 |
* that was established within the last 2 seconds
|
468 |
*/
|
469 |
free_con_id = -1;
|
470 |
for (con_id = 0; con_id < CONNECTBUFSIZE; con_id++) { |
471 |
if (connectbuf[con_id] != NULL) { |
472 |
if (mlCompareSocketIDs(&(connectbuf[con_id]->external_socketID), &(con_msg->sock_id)) == 0) { |
473 |
//timediff = difftime(now, connectbuf[con_id]->starttime); //TODO: why this timeout? Shouldn't the connection be closed instead if there is a timeout?
|
474 |
//if (timediff < 2)
|
475 |
//update remote connection ID
|
476 |
if (connectbuf[con_id]->external_connectionID != msg_h->local_con_id) {
|
477 |
warn("ML: updating remote connection ID for %s: from %d to %d\n",sock_id_str, connectbuf[con_id]->external_connectionID, msg_h->local_con_id);
|
478 |
connectbuf[con_id]->external_connectionID = msg_h->local_con_id; |
479 |
} |
480 |
break;
|
481 |
} |
482 |
} else if(free_con_id == -1) |
483 |
free_con_id = con_id; |
484 |
} |
485 |
|
486 |
if (con_id == CONNECTBUFSIZE) {
|
487 |
// create an entry in the connecttrybuf
|
488 |
if(free_con_id == -1) { |
489 |
error("ML: no new connect_buf available\n");
|
490 |
return;
|
491 |
} |
492 |
connectbuf[free_con_id] = (connect_data *) malloc(sizeof(connect_data));
|
493 |
memset(connectbuf[free_con_id],0,sizeof(connect_data)); |
494 |
connectbuf[free_con_id]->connection_head = connectbuf[free_con_id]->connection_last = NULL;
|
495 |
connectbuf[free_con_id]->starttime = time(NULL);
|
496 |
memcpy(&(connectbuf[free_con_id]->external_socketID), &(con_msg->sock_id), sizeof(socket_ID));
|
497 |
connectbuf[free_con_id]->pmtusize = con_msg->pmtu_size; // bootstrap pmtu from the other's size. Not strictly needed, but a good hint
|
498 |
connectbuf[free_con_id]->timeout_event = NULL;
|
499 |
connectbuf[free_con_id]->external_connectionID = msg_h->local_con_id; |
500 |
connectbuf[free_con_id]->internal_connect = |
501 |
!compare_external_address_socketIDs(&(con_msg->sock_id), loc_socketID); |
502 |
con_id = free_con_id; |
503 |
} |
504 |
|
505 |
//if(connectbuf[con_id]->status <= CONNECT) { //TODO: anwer anyway. Why the outher would invite otherwise?
|
506 |
//update status and send back answer
|
507 |
connectbuf[con_id]->status = CONNECT; |
508 |
send_conn_msg_with_pmtu_discovery(con_id, con_msg->pmtu_size, CONNECT); |
509 |
//}
|
510 |
break;
|
511 |
case CONNECT:
|
512 |
info("ML: received CONNECT from %s (size:%d)\n", sock_id_str, msg_size);
|
513 |
|
514 |
if(msg_h->remote_con_id != -1 && connectbuf[msg_h->remote_con_id] == NULL) { |
515 |
error("ML: received CONNECT for inexistent connection rconID:%d\n",msg_h->remote_con_id);
|
516 |
return;
|
517 |
} |
518 |
|
519 |
/*
|
520 |
* check if the connection status is not already 1 or 2
|
521 |
*/
|
522 |
if (connectbuf[msg_h->remote_con_id]->status == INVITE) {
|
523 |
// set the external connectionID
|
524 |
connectbuf[msg_h->remote_con_id]->external_connectionID = msg_h->local_con_id; |
525 |
// change status con_msg the connection_data
|
526 |
connectbuf[msg_h->remote_con_id]->status = READY; |
527 |
// change pmtusize in the connection_data: not needed. receiving a CONNECT means our INVITE went through. So why change pmtu?
|
528 |
//connectbuf[msg_h->remote_con_id]->pmtusize = con_msg->pmtu_size;
|
529 |
|
530 |
// send the READY
|
531 |
send_conn_msg_with_pmtu_discovery(msg_h->remote_con_id, con_msg->pmtu_size, READY); |
532 |
|
533 |
if (receive_Connection_cb != NULL) |
534 |
(receive_Connection_cb) (msg_h->remote_con_id, NULL);
|
535 |
|
536 |
// call all registered callbacks
|
537 |
while(connectbuf[msg_h->remote_con_id]->connection_head != NULL) { |
538 |
struct receive_connection_cb_list *temp;
|
539 |
temp = connectbuf[msg_h->remote_con_id]->connection_head; |
540 |
(temp->connection_cb) (msg_h->remote_con_id, temp->arg); |
541 |
connectbuf[msg_h->remote_con_id]->connection_head = temp->next; |
542 |
free(temp); |
543 |
} |
544 |
connectbuf[msg_h->remote_con_id]->connection_head = |
545 |
connectbuf[msg_h->remote_con_id]->connection_last = NULL;
|
546 |
} else {
|
547 |
// send the READY
|
548 |
send_conn_msg_with_pmtu_discovery(msg_h->remote_con_id, con_msg->pmtu_size, READY); |
549 |
} |
550 |
|
551 |
debug("ML: active connection established\n");
|
552 |
break;
|
553 |
|
554 |
/*
|
555 |
* if READY: find the entry in the connection array set the
|
556 |
* connection active change the pmtu size
|
557 |
*/
|
558 |
case READY:
|
559 |
info("ML: received READY from %s (size:%d)\n", sock_id_str, msg_size);
|
560 |
if(connectbuf[msg_h->remote_con_id] == NULL) { |
561 |
error("ML: received READY for inexistent connection\n");
|
562 |
return;
|
563 |
} |
564 |
/*
|
565 |
* checks if the connection is not already established
|
566 |
*/
|
567 |
if (connectbuf[msg_h->remote_con_id]->status == CONNECT) {
|
568 |
// change status of the connection
|
569 |
connectbuf[msg_h->remote_con_id]->status = READY; |
570 |
// change pmtusize: not needed. pmtu doesn't have to be symmetric
|
571 |
//connectbuf[msg_h->remote_con_id]->pmtusize = con_msg->pmtu_size;
|
572 |
|
573 |
if (receive_Connection_cb != NULL) |
574 |
(receive_Connection_cb) (msg_h->remote_con_id, NULL);
|
575 |
|
576 |
while(connectbuf[msg_h->remote_con_id]->connection_head != NULL) { |
577 |
struct receive_connection_cb_list *temp;
|
578 |
temp = connectbuf[msg_h->remote_con_id]->connection_head; |
579 |
(temp->connection_cb) (msg_h->remote_con_id, temp->arg); |
580 |
connectbuf[msg_h->remote_con_id]->connection_head = temp->next; |
581 |
free(temp); |
582 |
} |
583 |
connectbuf[msg_h->remote_con_id]->connection_head = |
584 |
connectbuf[msg_h->remote_con_id]->connection_last = NULL;
|
585 |
debug("ML: passive connection established\n");
|
586 |
} |
587 |
break;
|
588 |
} |
589 |
} |
590 |
|
591 |
void recv_stun_msg(char *msgbuf, int recvSize) |
592 |
{ |
593 |
/*
|
594 |
* create empty stun message struct
|
595 |
*/
|
596 |
StunMessage resp; |
597 |
memset(&resp, 0, sizeof(StunMessage)); |
598 |
/*
|
599 |
* parse the message
|
600 |
*/
|
601 |
int returnValue = 0; |
602 |
returnValue = recv_stun_message(msgbuf, recvSize, &resp); |
603 |
|
604 |
if (returnValue == 0) { |
605 |
/*
|
606 |
* read the reflexive Address into the local_socketID
|
607 |
*/
|
608 |
struct sockaddr_in reflexiveAddr = {0}; |
609 |
reflexiveAddr.sin_family = AF_INET; |
610 |
reflexiveAddr.sin_addr.s_addr = htonl(resp.mappedAddress.ipv4.addr); |
611 |
reflexiveAddr.sin_port = htons(resp.mappedAddress.ipv4.port); |
612 |
socketaddrgen reflexiveAddres = {0};
|
613 |
reflexiveAddres.udpaddr = reflexiveAddr; |
614 |
local_socketID.external_addr = reflexiveAddres; |
615 |
NAT_traversal = true;
|
616 |
// callback to the upper layer indicating that the socketID is now
|
617 |
// ready to use
|
618 |
(receive_SocketID_cb) (&local_socketID, 0);
|
619 |
} |
620 |
} |
621 |
|
622 |
//done
|
623 |
void recv_timeout_cb(int fd, short event, void *arg) |
624 |
{ |
625 |
int recv_id = (long) arg; |
626 |
debug("ML: recv_timeout_cb called. Timeout for id:%d\n",recv_id);
|
627 |
|
628 |
if (recvdatabuf[recv_id] == NULL) { |
629 |
return;
|
630 |
} |
631 |
|
632 |
|
633 |
/* if(recvdatabuf[recv_id]->status == ACTIVE) {
|
634 |
//TODO make timeout at least a DEFINE
|
635 |
struct timeval timeout = { 4, 0 };
|
636 |
recvdatabuf[recv_id]->status = INACTIVE;
|
637 |
event_base_once(base, -1, EV_TIMEOUT, recv_timeout_cb,
|
638 |
arg, &timeout);
|
639 |
return;
|
640 |
}
|
641 |
*/
|
642 |
|
643 |
if(recvdatabuf[recv_id]->status == ACTIVE) {
|
644 |
// Monitoring layer hook
|
645 |
if(get_Recv_data_inf_cb != NULL) { |
646 |
mon_data_inf recv_data_inf; |
647 |
|
648 |
recv_data_inf.remote_socketID = |
649 |
&(connectbuf[recvdatabuf[recv_id]->connectionID]->external_socketID); |
650 |
recv_data_inf.buffer = recvdatabuf[recv_id]->recvbuf; |
651 |
recv_data_inf.bufSize = recvdatabuf[recv_id]->bufsize; |
652 |
recv_data_inf.msgtype = recvdatabuf[recv_id]->msgtype; |
653 |
recv_data_inf.monitoringDataHeaderLen = recvdatabuf[recv_id]->monitoringDataHeaderLen; |
654 |
recv_data_inf.monitoringDataHeader = recvdatabuf[recv_id]->monitoringDataHeaderLen ? |
655 |
recvdatabuf[recv_id]->recvbuf : NULL;
|
656 |
gettimeofday(&recv_data_inf.arrival_time, NULL);
|
657 |
recv_data_inf.firstPacketArrived = recvdatabuf[recv_id]->firstPacketArrived; |
658 |
recv_data_inf.recvFragments = recvdatabuf[recv_id]->recvFragments; |
659 |
recv_data_inf.priority = false;
|
660 |
recv_data_inf.padding = false;
|
661 |
recv_data_inf.confirmation = false;
|
662 |
recv_data_inf.reliable = false;
|
663 |
|
664 |
// send data recv callback to monitoring module
|
665 |
|
666 |
(get_Recv_data_inf_cb) ((void *) &recv_data_inf);
|
667 |
} |
668 |
|
669 |
// Get the right callback
|
670 |
receive_data_cb receive_data_callback = recvcbbuf[recvdatabuf[recv_id]->msgtype]; |
671 |
|
672 |
recv_params rParams; |
673 |
|
674 |
rParams.nrMissingBytes = recvdatabuf[recv_id]->bufsize - recvdatabuf[recv_id]->arrivedBytes; |
675 |
rParams.recvFragments = recvdatabuf[recv_id]->recvFragments; |
676 |
rParams.msgtype = recvdatabuf[recv_id]->msgtype; |
677 |
rParams.connectionID = recvdatabuf[recv_id]->connectionID; |
678 |
rParams.remote_socketID = |
679 |
&(connectbuf[recvdatabuf[recv_id]->connectionID]->external_socketID); |
680 |
rParams.firstPacketArrived = recvdatabuf[recv_id]->firstPacketArrived; |
681 |
|
682 |
(receive_data_callback) (recvdatabuf[recv_id]->recvbuf + recvdatabuf[recv_id]->monitoringDataHeaderLen, recvdatabuf[recv_id]->bufsize - recvdatabuf[recv_id]->monitoringDataHeaderLen, |
683 |
recvdatabuf[recv_id]->msgtype, &rParams); |
684 |
|
685 |
//clean up
|
686 |
if (recvdatabuf[recv_id]->timeout_event) {
|
687 |
event_del(recvdatabuf[recv_id]->timeout_event); |
688 |
event_free(recvdatabuf[recv_id]->timeout_event); |
689 |
recvdatabuf[recv_id]->timeout_event = NULL;
|
690 |
} |
691 |
free(recvdatabuf[recv_id]->recvbuf); |
692 |
free(recvdatabuf[recv_id]); |
693 |
recvdatabuf[recv_id] = NULL;
|
694 |
} |
695 |
} |
696 |
|
697 |
// process a single recv data message
|
698 |
void recv_data_msg(struct msg_header *msg_h, char *msgbuf, int bufsize) |
699 |
{ |
700 |
debug("ML: received packet of size %d with rconID:%d lconID:%d type:%d offset:%d\n",bufsize,msg_h->remote_con_id,msg_h->local_con_id,msg_h->msg_type,msg_h->offset);
|
701 |
|
702 |
int recv_id, free_recv_id = -1; |
703 |
|
704 |
if(connectbuf[msg_h->remote_con_id] == NULL) { |
705 |
debug("ML: Received a message not related to any opened connection!\n");
|
706 |
return;
|
707 |
} |
708 |
|
709 |
// check if a recv_data exist and enter data
|
710 |
for (recv_id = 0; recv_id < RECVDATABUFSIZE; recv_id++) |
711 |
if (recvdatabuf[recv_id] != NULL) { |
712 |
if (msg_h->remote_con_id == recvdatabuf[recv_id]->connectionID &&
|
713 |
msg_h->msg_seq_num == recvdatabuf[recv_id]->seqnr) |
714 |
break;
|
715 |
} else
|
716 |
if(free_recv_id == -1) |
717 |
free_recv_id = recv_id; |
718 |
|
719 |
|
720 |
if(recv_id == RECVDATABUFSIZE) {
|
721 |
//no recv_data found: create one
|
722 |
recv_id = free_recv_id; |
723 |
recvdatabuf[recv_id] = (recvdata *) malloc(sizeof(recvdata));
|
724 |
memset(recvdatabuf[recv_id], 0, sizeof(recvdata)); |
725 |
recvdatabuf[recv_id]->connectionID = msg_h->remote_con_id; |
726 |
recvdatabuf[recv_id]->seqnr = msg_h->msg_seq_num; |
727 |
recvdatabuf[recv_id]->monitoringDataHeaderLen = msg_h->len_mon_data_hdr; |
728 |
recvdatabuf[recv_id]->bufsize = msg_h->msg_length + msg_h->len_mon_data_hdr; |
729 |
recvdatabuf[recv_id]->recvbuf = (char *) malloc(recvdatabuf[recv_id]->bufsize);
|
730 |
recvdatabuf[recv_id]->arrivedBytes = 0; //count this without the Mon headers |
731 |
/*
|
732 |
* read the timeout data and set it
|
733 |
*/
|
734 |
recvdatabuf[recv_id]->timeout_value = recv_timeout; |
735 |
recvdatabuf[recv_id]->timeout_event = NULL;
|
736 |
recvdatabuf[recv_id]->recvID = recv_id; |
737 |
recvdatabuf[recv_id]->starttime = time(NULL);
|
738 |
recvdatabuf[recv_id]->msgtype = msg_h->msg_type; |
739 |
|
740 |
// fill the buffer with zeros
|
741 |
memset(recvdatabuf[recv_id]->recvbuf, 0, recvdatabuf[recv_id]->bufsize);
|
742 |
debug(" new @ id:%d\n",recv_id);
|
743 |
} else { //message structure already exists, no need to create new |
744 |
debug(" found @ id:%d (arrived before this packet: bytes:%d fragments%d\n",recv_id, recvdatabuf[recv_id]->arrivedBytes, recvdatabuf[recv_id]->recvFragments);
|
745 |
} |
746 |
|
747 |
//if first packet extract mon data header and advance pointer
|
748 |
if (msg_h->offset == 0) { |
749 |
memcpy(recvdatabuf[recv_id]->recvbuf, msgbuf, msg_h->len_mon_data_hdr); |
750 |
msgbuf += msg_h->len_mon_data_hdr; |
751 |
bufsize -= msg_h->len_mon_data_hdr; |
752 |
recvdatabuf[recv_id]->firstPacketArrived = 1;
|
753 |
} |
754 |
|
755 |
|
756 |
// increment fragmentnr
|
757 |
recvdatabuf[recv_id]->recvFragments++; |
758 |
// increment the arrivedBytes
|
759 |
recvdatabuf[recv_id]->arrivedBytes += bufsize; |
760 |
|
761 |
// enter the data into the buffer
|
762 |
memcpy(recvdatabuf[recv_id]->recvbuf + msg_h->len_mon_data_hdr + msg_h->offset, msgbuf, bufsize); |
763 |
|
764 |
//TODO very basic checkif all fragments arrived: has to be reviewed
|
765 |
if(recvdatabuf[recv_id]->arrivedBytes == recvdatabuf[recv_id]->bufsize - recvdatabuf[recv_id]->monitoringDataHeaderLen)
|
766 |
recvdatabuf[recv_id]->status = COMPLETE; //buffer full -> msg completly arrived
|
767 |
else
|
768 |
recvdatabuf[recv_id]->status = ACTIVE; |
769 |
|
770 |
if (recv_data_callback) {
|
771 |
if(recvdatabuf[recv_id]->status == COMPLETE) {
|
772 |
// Monitoring layer hook
|
773 |
if(get_Recv_data_inf_cb != NULL) { |
774 |
mon_data_inf recv_data_inf; |
775 |
|
776 |
recv_data_inf.remote_socketID = |
777 |
&(connectbuf[recvdatabuf[recv_id]->connectionID]->external_socketID); |
778 |
recv_data_inf.buffer = recvdatabuf[recv_id]->recvbuf; |
779 |
recv_data_inf.bufSize = recvdatabuf[recv_id]->bufsize; |
780 |
recv_data_inf.msgtype = recvdatabuf[recv_id]->msgtype; |
781 |
recv_data_inf.monitoringDataHeaderLen = recvdatabuf[recv_id]->monitoringDataHeaderLen; |
782 |
recv_data_inf.monitoringDataHeader = recvdatabuf[recv_id]->monitoringDataHeaderLen ? |
783 |
recvdatabuf[recv_id]->recvbuf : NULL;
|
784 |
gettimeofday(&recv_data_inf.arrival_time, NULL);
|
785 |
recv_data_inf.firstPacketArrived = recvdatabuf[recv_id]->firstPacketArrived; |
786 |
recv_data_inf.recvFragments = recvdatabuf[recv_id]->recvFragments; |
787 |
recv_data_inf.priority = false;
|
788 |
recv_data_inf.padding = false;
|
789 |
recv_data_inf.confirmation = false;
|
790 |
recv_data_inf.reliable = false;
|
791 |
|
792 |
// send data recv callback to monitoring module
|
793 |
|
794 |
(get_Recv_data_inf_cb) ((void *) &recv_data_inf);
|
795 |
} |
796 |
|
797 |
// Get the right callback
|
798 |
receive_data_cb receive_data_callback = recvcbbuf[msg_h->msg_type]; |
799 |
if (receive_data_callback) {
|
800 |
|
801 |
recv_params rParams; |
802 |
|
803 |
rParams.nrMissingBytes = recvdatabuf[recv_id]->bufsize - recvdatabuf[recv_id]->monitoringDataHeaderLen - recvdatabuf[recv_id]->arrivedBytes; |
804 |
rParams.recvFragments = recvdatabuf[recv_id]->recvFragments; |
805 |
rParams.msgtype = recvdatabuf[recv_id]->msgtype; |
806 |
rParams.connectionID = recvdatabuf[recv_id]->connectionID; |
807 |
rParams.remote_socketID = |
808 |
&(connectbuf[recvdatabuf[recv_id]->connectionID]->external_socketID); |
809 |
|
810 |
char str[1000]; |
811 |
mlSocketIDToString(rParams.remote_socketID,str,999);
|
812 |
debug("ML: received message from conID:%d, %s\n",recvdatabuf[recv_id]->connectionID,str);
|
813 |
rParams.firstPacketArrived = recvdatabuf[recv_id]->firstPacketArrived; |
814 |
|
815 |
(receive_data_callback) (recvdatabuf[recv_id]->recvbuf + recvdatabuf[recv_id]->monitoringDataHeaderLen, recvdatabuf[recv_id]->bufsize - recvdatabuf[recv_id]->monitoringDataHeaderLen, |
816 |
recvdatabuf[recv_id]->msgtype, (void *) &rParams);
|
817 |
} else {
|
818 |
warn("ML: callback not initialized for this message type: %d!\n",msg_h->msg_type);
|
819 |
} |
820 |
|
821 |
//clean up
|
822 |
if (recvdatabuf[recv_id]->timeout_event) {
|
823 |
debug("ML: freeing timeout for %d",recv_id);
|
824 |
event_del(recvdatabuf[recv_id]->timeout_event); |
825 |
event_free(recvdatabuf[recv_id]->timeout_event); |
826 |
recvdatabuf[recv_id]->timeout_event = NULL;
|
827 |
} else {
|
828 |
debug("ML: received in 1 packet\n",recv_id);
|
829 |
} |
830 |
free(recvdatabuf[recv_id]->recvbuf); |
831 |
free(recvdatabuf[recv_id]); |
832 |
recvdatabuf[recv_id] = NULL;
|
833 |
} else { // not COMPLETE |
834 |
if (!recvdatabuf[recv_id]->timeout_event) {
|
835 |
//start time out
|
836 |
//TODO make timeout at least a DEFINE
|
837 |
recvdatabuf[recv_id]->timeout_event = event_new(base, -1, EV_TIMEOUT, &recv_timeout_cb, (void *) (long)recv_id); |
838 |
evtimer_add(recvdatabuf[recv_id]->timeout_event, &recv_timeout); |
839 |
} |
840 |
} |
841 |
} |
842 |
} |
843 |
|
844 |
//done
|
845 |
void pmtu_timeout_cb(int fd, short event, void *arg) |
846 |
{ |
847 |
|
848 |
int con_id = (long) arg; |
849 |
pmtu new_pmtusize; |
850 |
|
851 |
debug("ML: pmtu timeout called (lcon:%d)\n",con_id);
|
852 |
|
853 |
if(connectbuf[con_id] == NULL) { |
854 |
error("ML: pmtu timeout called on non existing con_id\n");
|
855 |
return;
|
856 |
} |
857 |
|
858 |
if(connectbuf[con_id]->status == READY) {
|
859 |
// nothing to do anymore
|
860 |
event_del(connectbuf[con_id]->timeout_event); |
861 |
event_free(connectbuf[con_id]->timeout_event); |
862 |
connectbuf[con_id]->timeout_event = NULL;
|
863 |
return;
|
864 |
} |
865 |
|
866 |
info("ML: pmtu timeout while connecting(to:%s lcon:%d status:%d size:%d trial:%d tout:%ld.%06ld)\n",conid_to_string(con_id), con_id, connectbuf[con_id]->status, connectbuf[con_id]->pmtusize, connectbuf[con_id]->trials, connectbuf[con_id]->timeout_value.tv_sec, connectbuf[con_id]->timeout_value.tv_usec);
|
867 |
|
868 |
if(connectbuf[con_id]->delay || connectbuf[con_id]->trials == MAX_TRIALS - 1) { |
869 |
double delay = connectbuf[con_id]->timeout_value.tv_sec + connectbuf[con_id]->timeout_value.tv_usec / 1000000.0; |
870 |
delay = delay * 2;
|
871 |
info("\tML: increasing pmtu timeout to %f sec\n", delay);
|
872 |
connectbuf[con_id]->timeout_value.tv_sec = floor(delay); |
873 |
connectbuf[con_id]->timeout_value.tv_usec = fmod(delay, 1.0) * 1000000.0; |
874 |
if(connectbuf[con_id]->delay) {
|
875 |
connectbuf[con_id]->delay = false;
|
876 |
reschedule_conn_msg(con_id); |
877 |
} |
878 |
} |
879 |
|
880 |
if(connectbuf[con_id]->trials == MAX_TRIALS) {
|
881 |
// decrement the pmtu size
|
882 |
struct timeval tout = PMTU_TIMEOUT;
|
883 |
info("\tML: decreasing pmtu estimate from %d to %d\n", connectbuf[con_id]->pmtusize, pmtu_decrement(connectbuf[con_id]->pmtusize));
|
884 |
connectbuf[con_id]->pmtusize = pmtu_decrement(connectbuf[con_id]->pmtusize); |
885 |
connectbuf[con_id]->timeout_value = tout; |
886 |
connectbuf[con_id]->trials = 0;
|
887 |
} |
888 |
|
889 |
//error in PMTU discovery?
|
890 |
if (connectbuf[con_id]->pmtusize == ERROR) {
|
891 |
if (connectbuf[con_id]->internal_connect == true) { |
892 |
//as of now we tried directly connecting, now let's try trough the NAT
|
893 |
connectbuf[con_id]->internal_connect = false;
|
894 |
connectbuf[con_id]->pmtusize = MAX; |
895 |
} else {
|
896 |
//nothing to do we have to give up
|
897 |
error("ML: Could not create connection with connectionID %i!\n",con_id);
|
898 |
// envoke the callback for failed connection establishment
|
899 |
if(failed_Connection_cb != NULL) |
900 |
(failed_Connection_cb) (con_id, NULL);
|
901 |
// delete the connection entry
|
902 |
mlCloseConnection(con_id); |
903 |
return;
|
904 |
} |
905 |
} |
906 |
|
907 |
//retry
|
908 |
resend_conn_msg(con_id); |
909 |
} |
910 |
|
911 |
|
912 |
int schedule_pmtu_timeout(int con_id) |
913 |
{ |
914 |
if (! connectbuf[con_id]->timeout_event) {
|
915 |
struct timeval tout = PMTU_TIMEOUT;
|
916 |
connectbuf[con_id]->timeout_value = tout; |
917 |
connectbuf[con_id]->trials = 1;
|
918 |
connectbuf[con_id]->timeout_event = event_new(base, -1, EV_TIMEOUT, &pmtu_timeout_cb, (void *) (long)con_id); |
919 |
evtimer_add(connectbuf[con_id]->timeout_event, &connectbuf[con_id]->timeout_value); |
920 |
} |
921 |
} |
922 |
|
923 |
/*
|
924 |
* decrements the mtu size
|
925 |
*/
|
926 |
pmtu pmtu_decrement(pmtu pmtusize) |
927 |
{ |
928 |
pmtu pmtu_return_size; |
929 |
switch(pmtusize) {
|
930 |
case MAX:
|
931 |
return DSL;
|
932 |
case DSL:
|
933 |
return DSLMEDIUM;
|
934 |
case DSLMEDIUM:
|
935 |
return DSLSLIM;
|
936 |
case DSLSLIM:
|
937 |
return BELOWDSL;
|
938 |
case BELOWDSL:
|
939 |
return MIN;
|
940 |
case MIN:
|
941 |
return ERROR;
|
942 |
default:
|
943 |
warn("ML: strange pmtu size encountered:%d, changing to some safe value:%d\n", pmtusize, MIN);
|
944 |
return MIN;
|
945 |
} |
946 |
} |
947 |
|
948 |
// called when an ICMP pmtu error message (type 3, code 4) is received
|
949 |
void pmtu_error_cb_th(char *msg, int msglen) |
950 |
{ |
951 |
debug("ML: pmtu_error callback called msg_size: %d\n",msglen);
|
952 |
//TODO debug
|
953 |
return;
|
954 |
|
955 |
char *msgbufptr = NULL; |
956 |
int msgtype;
|
957 |
int connectionID;
|
958 |
pmtu pmtusize; |
959 |
pmtu new_pmtusize; |
960 |
int dead = 0; |
961 |
|
962 |
// check the packettype
|
963 |
msgbufptr = &msg[0];
|
964 |
|
965 |
// check the msgtype
|
966 |
msgbufptr = &msg[1];
|
967 |
memcpy(&msgtype, msgbufptr, 4);
|
968 |
|
969 |
if (msgtype == 0) { |
970 |
|
971 |
// get the connectionID
|
972 |
msgbufptr = &msg[5];
|
973 |
memcpy(&connectionID, msgbufptr, 4);
|
974 |
|
975 |
int msgtype_c = connectbuf[connectionID]->status;
|
976 |
// pmtusize = connectbuf[connectionID]->pmtutrysize;
|
977 |
|
978 |
if (msgtype_c != msgtype) {
|
979 |
dead = 1;
|
980 |
} |
981 |
|
982 |
|
983 |
} else if (msgtype == 1) { |
984 |
|
985 |
// read the connectionID
|
986 |
msgbufptr = &msg[9];
|
987 |
memcpy(&connectionID, msgbufptr, 4);
|
988 |
|
989 |
int msgtype_c = connectbuf[connectionID]->status;
|
990 |
// pmtusize = connectbuf[connectionID]->pmtutrysize;
|
991 |
|
992 |
if (msgtype_c != msgtype) {
|
993 |
dead = 1;
|
994 |
} |
995 |
|
996 |
} |
997 |
// decrement the pmtu size
|
998 |
new_pmtusize = pmtu_decrement(pmtusize); |
999 |
|
1000 |
// connectbuf[connectionID]->pmtutrysize = new_pmtusize;
|
1001 |
|
1002 |
if (new_pmtusize == ERROR) {
|
1003 |
error("ML: Could not create connection with connectionID %i !\n",
|
1004 |
connectionID); |
1005 |
|
1006 |
if(failed_Connection_cb != NULL) |
1007 |
(failed_Connection_cb) (connectionID, NULL);
|
1008 |
// set the message type to a non existent message
|
1009 |
msgtype = 2;
|
1010 |
// delete the connection entry
|
1011 |
mlCloseConnection(connectionID); |
1012 |
} |
1013 |
|
1014 |
if (msgtype == 0 && dead != 1) { |
1015 |
|
1016 |
// stop the timeout event
|
1017 |
// timeout_del(connectbuf[connectionID]->timeout);
|
1018 |
/*
|
1019 |
* libevent2
|
1020 |
*/
|
1021 |
|
1022 |
// event_del(connectbuf[connectionID]->timeout);
|
1023 |
|
1024 |
|
1025 |
// create and send a connection message
|
1026 |
// create_conn_msg(new_pmtusize, connectionID,
|
1027 |
// &local_socketID, INVITE);
|
1028 |
|
1029 |
// send_conn_msg(connectionID, new_pmtusize);
|
1030 |
|
1031 |
// set a timeout event for the pmtu discovery
|
1032 |
// timeout_set(connectbuf[connectionID]->timeout,pmtu_timeout_cb,(void
|
1033 |
// *)&connectionID);
|
1034 |
|
1035 |
// timeout_add(connectbuf[connectionID]->timeout,&connectbuf[connectionID]->timeout_value);
|
1036 |
|
1037 |
/*
|
1038 |
* libevent2
|
1039 |
*/
|
1040 |
|
1041 |
struct event *ev;
|
1042 |
ev = evtimer_new(base, pmtu_timeout_cb, |
1043 |
(void *) connectbuf[connectionID]);
|
1044 |
|
1045 |
// connectbuf[connectionID]->timeout = ev;
|
1046 |
|
1047 |
event_add(ev, &connectbuf[connectionID]->timeout_value); |
1048 |
|
1049 |
} else if (msgtype == 1 && dead != 1) { |
1050 |
|
1051 |
// stop the timeout event
|
1052 |
// timeout_del(connectbuf[connectionID]->timeout);
|
1053 |
|
1054 |
/*
|
1055 |
* libevent2
|
1056 |
*/
|
1057 |
// info("still here 11 \n");
|
1058 |
// printf("ev %d \n",connectbuf[connectionID]->timeout);
|
1059 |
// event_del(connectbuf[connectionID]->timeout );
|
1060 |
// evtimer_del(connectbuf[connectionID]->timeout );
|
1061 |
|
1062 |
|
1063 |
// // create and send a connection message
|
1064 |
// create_conn_msg(new_pmtusize,
|
1065 |
// connectbuf[connectionID]->connectionID,
|
1066 |
// NULL, CONNECT);
|
1067 |
|
1068 |
//send_conn_msg(connectionID, new_pmtusize);
|
1069 |
|
1070 |
// set a timeout event for the pmtu discovery
|
1071 |
// timeout_set(connectbuf[connectionID]->timeout,pmtu_timeout_cb,(void
|
1072 |
// *)&connectionID);
|
1073 |
// timeout_add(connectbuf[connectionID]->timeout,&connectbuf[connectionID]->timeout_value);
|
1074 |
|
1075 |
/*
|
1076 |
* libevent2
|
1077 |
*/
|
1078 |
// struct event *ev;
|
1079 |
// ev = evtimer_new(base,pmtu_timeout_cb, (void
|
1080 |
// *)connectbuf[connectionID]);
|
1081 |
// connectbuf[connectionID]->timeout = ev;
|
1082 |
// event_add(ev,&connectbuf[connectionID]->timeout_value);
|
1083 |
|
1084 |
} |
1085 |
} |
1086 |
|
1087 |
/*
|
1088 |
* what to do once a packet arrived if it is a conn packet send it to
|
1089 |
* recv_conn handler if it is a data packet send it to the recv_data
|
1090 |
* handler
|
1091 |
*/
|
1092 |
|
1093 |
//done --
|
1094 |
void recv_pkg(int fd, short event, void *arg) |
1095 |
{ |
1096 |
debug("ML: recv_pkg called\n");
|
1097 |
|
1098 |
struct msg_header *msg_h;
|
1099 |
char msgbuf[MAX];
|
1100 |
pmtu recvSize = MAX; |
1101 |
char *bufptr = msgbuf;
|
1102 |
int ttl;
|
1103 |
struct sockaddr_in recv_addr;
|
1104 |
int msg_size;
|
1105 |
|
1106 |
recvPacket(fd, msgbuf, &recvSize, &recv_addr, pmtu_error_cb_th, &ttl); |
1107 |
|
1108 |
|
1109 |
// check if it is not just an ERROR message
|
1110 |
if(recvSize < 0) |
1111 |
return;
|
1112 |
|
1113 |
// @TODO check if this simplistic STUN message recognition really always works, probably not
|
1114 |
unsigned short stun_bind_response = 0x0101; |
1115 |
unsigned short * msgspot = (unsigned short *) msgbuf; |
1116 |
if (*msgspot == stun_bind_response) {
|
1117 |
debug("ML: recv_pkg: parse stun message called\n");
|
1118 |
recv_stun_msg(msgbuf, recvSize); |
1119 |
return;
|
1120 |
} |
1121 |
|
1122 |
msg_h = (struct msg_header *) msgbuf;
|
1123 |
|
1124 |
//verify minimum size
|
1125 |
if (recvSize < sizeof(struct msg_header)) { |
1126 |
info("UDP packet too small, can't be an ML packet");
|
1127 |
return;
|
1128 |
} |
1129 |
|
1130 |
//TODO add more verifications
|
1131 |
|
1132 |
bufptr += MSG_HEADER_SIZE + msg_h->len_mon_packet_hdr; |
1133 |
msg_size = recvSize - MSG_HEADER_SIZE - msg_h->len_mon_packet_hdr; |
1134 |
|
1135 |
//verify more fields
|
1136 |
if (msg_size < 0) { |
1137 |
info("Corrupted UDP packet received");
|
1138 |
return;
|
1139 |
} |
1140 |
|
1141 |
if(get_Recv_pkt_inf_cb != NULL) { |
1142 |
mon_pkt_inf msginfNow; |
1143 |
msginfNow.monitoringHeaderLen = msg_h->len_mon_packet_hdr; |
1144 |
msginfNow.monitoringHeader = msg_h->len_mon_packet_hdr ? &msgbuf[0] + MSG_HEADER_SIZE : NULL; |
1145 |
//TODO rethink this ...
|
1146 |
if(msg_h->msg_type == ML_CON_MSG) {
|
1147 |
struct conn_msg *c_msg = (struct conn_msg *) bufptr; |
1148 |
msginfNow.remote_socketID = &(c_msg->sock_id); |
1149 |
} |
1150 |
else if(connectbuf[msg_h->remote_con_id] == NULL) { |
1151 |
error("ML: received pkg called with non existent connection\n");
|
1152 |
return;
|
1153 |
} else
|
1154 |
msginfNow.remote_socketID = &(connectbuf[msg_h->remote_con_id]->external_socketID); |
1155 |
msginfNow.buffer = bufptr; |
1156 |
msginfNow.bufSize = recvSize; |
1157 |
msginfNow.msgtype = msg_h->msg_type; |
1158 |
msginfNow.ttl = ttl; |
1159 |
msginfNow.dataID = msg_h->msg_seq_num; |
1160 |
msginfNow.offset = msg_h->offset; |
1161 |
msginfNow.datasize = msg_h->msg_length; |
1162 |
gettimeofday(&msginfNow.arrival_time, NULL);
|
1163 |
(get_Recv_pkt_inf_cb) ((void *) &msginfNow);
|
1164 |
} |
1165 |
|
1166 |
|
1167 |
switch(msg_h->msg_type) {
|
1168 |
case ML_CON_MSG:
|
1169 |
debug("ML: received conn pkg\n");
|
1170 |
recv_conn_msg(msg_h, bufptr, msg_size, &recv_addr); |
1171 |
break;
|
1172 |
default:
|
1173 |
if(msg_h->msg_type < 127) { |
1174 |
debug("ML: received data pkg\n");
|
1175 |
recv_data_msg(msg_h, bufptr, msg_size); |
1176 |
break;
|
1177 |
} |
1178 |
debug("ML: unrecognised msg_type\n");
|
1179 |
break;
|
1180 |
} |
1181 |
} |
1182 |
|
1183 |
/*
|
1184 |
* compare the external IP address of two socketIDs
|
1185 |
*/
|
1186 |
int
|
1187 |
compare_external_address_socketIDs(socketID_handle sock1, socketID_handle sock2) |
1188 |
{ |
1189 |
if( sock1->external_addr.udpaddr.sin_addr.s_addr == sock2->external_addr.udpaddr.sin_addr.s_addr)
|
1190 |
return 0; |
1191 |
return 1; |
1192 |
} |
1193 |
|
1194 |
void try_stun();
|
1195 |
|
1196 |
/*
|
1197 |
* the timeout of the NAT traversal
|
1198 |
*/
|
1199 |
void nat_traversal_timeout(int fd, short event, void *arg) |
1200 |
{ |
1201 |
if (NAT_traversal == false) { |
1202 |
debug("ML: NAT traversal request re-send\n");
|
1203 |
if(receive_SocketID_cb)
|
1204 |
(receive_SocketID_cb) (&local_socketID, 2);
|
1205 |
try_stun(); |
1206 |
} |
1207 |
} |
1208 |
|
1209 |
//return IP address, or INADDR_NONE if can't resolve
|
1210 |
unsigned long resolve(const char *ipaddr) |
1211 |
{ |
1212 |
struct hostent *h = gethostbyname(ipaddr);
|
1213 |
if (!h) {
|
1214 |
error("ML: Unable to resolve host name %s\n", ipaddr);
|
1215 |
return INADDR_NONE;
|
1216 |
} |
1217 |
unsigned long *addr = (unsigned long *) (h->h_addr); |
1218 |
return *addr;
|
1219 |
} |
1220 |
|
1221 |
|
1222 |
/*
|
1223 |
* returns the file descriptor, or <0 on error. The ipaddr can be a null
|
1224 |
* pointer. Then all available ipaddr on the machine are choosen.
|
1225 |
*/
|
1226 |
int create_socket(const int port, const char *ipaddr) |
1227 |
{ |
1228 |
struct sockaddr_in udpaddr = {0}; |
1229 |
udpaddr.sin_family = AF_INET; |
1230 |
if (ipaddr == NULL) { |
1231 |
/*
|
1232 |
* try to guess the local IP address
|
1233 |
*/
|
1234 |
const char *ipaddr_iface = mlAutodetectIPAddress(); |
1235 |
if (ipaddr_iface) {
|
1236 |
udpaddr.sin_addr.s_addr = inet_addr(ipaddr_iface); |
1237 |
} else {
|
1238 |
udpaddr.sin_addr.s_addr = INADDR_ANY; |
1239 |
} |
1240 |
} else {
|
1241 |
udpaddr.sin_addr.s_addr = inet_addr(ipaddr); |
1242 |
} |
1243 |
udpaddr.sin_port = htons(port); |
1244 |
|
1245 |
socketaddrgen udpgen; |
1246 |
memset(&udpgen,0,sizeof(socketaddrgen)); //this will be sent over the net, so set it to 0 |
1247 |
udpgen.udpaddr = udpaddr; |
1248 |
local_socketID.internal_addr = udpgen; |
1249 |
|
1250 |
socketfd = createSocket(port, ipaddr); |
1251 |
if (socketfd < 0){ |
1252 |
return socketfd;
|
1253 |
} |
1254 |
|
1255 |
struct event *ev;
|
1256 |
ev = event_new(base, socketfd, EV_READ | EV_PERSIST, recv_pkg, NULL);
|
1257 |
|
1258 |
event_add(ev, NULL);
|
1259 |
|
1260 |
try_stun(); |
1261 |
|
1262 |
return socketfd;
|
1263 |
} |
1264 |
|
1265 |
/*
|
1266 |
* try to figure out external IP using STUN, if defined
|
1267 |
*/
|
1268 |
void try_stun()
|
1269 |
{ |
1270 |
if (isStunDefined()) {
|
1271 |
/*
|
1272 |
* send the NAT traversal STUN request
|
1273 |
*/
|
1274 |
send_stun_request(socketfd, &stun_server); |
1275 |
|
1276 |
/*
|
1277 |
* enter a NAT traversal timeout that takes care of retransmission
|
1278 |
*/
|
1279 |
struct event *ev1;
|
1280 |
struct timeval timeout_value_NAT_traversal = NAT_TRAVERSAL_TIMEOUT;
|
1281 |
ev1 = evtimer_new(base, nat_traversal_timeout, NULL);
|
1282 |
event_add(ev1, &timeout_value_NAT_traversal); |
1283 |
|
1284 |
NAT_traversal = false;
|
1285 |
} else {
|
1286 |
/*
|
1287 |
* Assume we have accessibility and copy internal address to external one
|
1288 |
*/
|
1289 |
local_socketID.external_addr = local_socketID.internal_addr; |
1290 |
NAT_traversal = true; // @TODO: this is not really NAT traversal, but a flag that init is over |
1291 |
// callback to the upper layer indicating that the socketID is now
|
1292 |
// ready to use
|
1293 |
if(receive_SocketID_cb)
|
1294 |
(receive_SocketID_cb) (&local_socketID, 0); //success |
1295 |
} |
1296 |
} |
1297 |
|
1298 |
/**************************** END OF INTERNAL ***********************/
|
1299 |
|
1300 |
/**************************** MONL functions *************************/
|
1301 |
|
1302 |
int mlInit(bool recv_data_cb,struct timeval timeout_value,const int port,const char *ipaddr,const int stun_port,const char *stun_ipaddr,receive_localsocketID_cb local_socketID_cb,void *arg){ |
1303 |
|
1304 |
base = (struct event_base *) arg;
|
1305 |
recv_data_callback = recv_data_cb; |
1306 |
mlSetRecvTimeout(timeout_value); |
1307 |
if (stun_ipaddr) {
|
1308 |
mlSetStunServer(stun_port, stun_ipaddr); |
1309 |
} else {
|
1310 |
|
1311 |
} |
1312 |
register_recv_localsocketID_cb(local_socketID_cb); |
1313 |
return create_socket(port, ipaddr);
|
1314 |
} |
1315 |
|
1316 |
/* register callbacks */
|
1317 |
void mlRegisterGetRecvPktInf(get_recv_pkt_inf_cb recv_pkt_inf_cb){
|
1318 |
|
1319 |
if (recv_pkt_inf_cb == NULL) |
1320 |
error("ML: Register get_recv_pkt_inf_cb failed: NULL ptr \n");
|
1321 |
else
|
1322 |
get_Recv_pkt_inf_cb = recv_pkt_inf_cb; |
1323 |
|
1324 |
} |
1325 |
|
1326 |
void mlRegisterGetSendPktInf(get_send_pkt_inf_cb send_pkt_inf_cb){
|
1327 |
|
1328 |
if (send_pkt_inf_cb == NULL) |
1329 |
error("ML: Register get_send_pkt_inf_cb: NULL ptr \n");
|
1330 |
else
|
1331 |
get_Send_pkt_inf_cb = send_pkt_inf_cb; |
1332 |
|
1333 |
} |
1334 |
|
1335 |
|
1336 |
void mlRegisterSetMonitoringHeaderPktCb(set_monitoring_header_pkt_cb monitoring_header_pkt_cb ){
|
1337 |
|
1338 |
if (monitoring_header_pkt_cb == NULL) |
1339 |
error("ML: Register set_monitoring_header_pkt_cb: NULL ptr \n");
|
1340 |
else
|
1341 |
set_Monitoring_header_pkt_cb = monitoring_header_pkt_cb; |
1342 |
|
1343 |
} |
1344 |
|
1345 |
void mlRegisterGetRecvDataInf(get_recv_data_inf_cb recv_data_inf_cb){
|
1346 |
|
1347 |
if (recv_data_inf_cb == NULL) |
1348 |
error("ML: Register get_recv_data_inf_cb: NULL ptr \n");
|
1349 |
else
|
1350 |
get_Recv_data_inf_cb = recv_data_inf_cb; |
1351 |
|
1352 |
} |
1353 |
|
1354 |
void mlRegisterGetSendDataInf(get_send_data_inf_cb send_data_inf_cb){
|
1355 |
|
1356 |
if (send_data_inf_cb == NULL) |
1357 |
error("ML: Register get_send_data_inf_cb: NULL ptr \n");
|
1358 |
else
|
1359 |
get_Send_data_inf_cb = send_data_inf_cb; |
1360 |
|
1361 |
} |
1362 |
|
1363 |
void mlRegisterSetMonitoringHeaderDataCb(set_monitoring_header_data_cb monitoring_header_data_cb){
|
1364 |
|
1365 |
if (monitoring_header_data_cb == NULL) |
1366 |
error("ML: Register set_monitoring_header_data_cb : NULL ptr \n");
|
1367 |
else
|
1368 |
set_Monitoring_header_data_cb = monitoring_header_data_cb; |
1369 |
|
1370 |
} |
1371 |
|
1372 |
void mlSetRecvTimeout(struct timeval timeout_value){ |
1373 |
|
1374 |
recv_timeout = timeout_value; |
1375 |
|
1376 |
} |
1377 |
|
1378 |
int mlGetStandardTTL(socketID_handle socketID,uint8_t *ttl){
|
1379 |
|
1380 |
return getTTL(socketfd, ttl);
|
1381 |
|
1382 |
} |
1383 |
|
1384 |
socketID_handle mlGetLocalSocketID(int *errorstatus){
|
1385 |
|
1386 |
if (NAT_traversal == false) { |
1387 |
*errorstatus = 2;
|
1388 |
return NULL; |
1389 |
} |
1390 |
|
1391 |
*errorstatus = 0;
|
1392 |
return &local_socketID;
|
1393 |
|
1394 |
} |
1395 |
|
1396 |
|
1397 |
/**************************** END of MONL functions *************************/
|
1398 |
|
1399 |
/**************************** GENERAL functions *************************/
|
1400 |
|
1401 |
void mlRegisterRecvConnectionCb(receive_connection_cb recv_conn_cb){
|
1402 |
|
1403 |
if (recv_conn_cb == NULL) |
1404 |
error("ML: Register receive_connection_cb: NULL ptr \n");
|
1405 |
else
|
1406 |
receive_Connection_cb = recv_conn_cb; |
1407 |
|
1408 |
} |
1409 |
|
1410 |
void mlRegisterErrorConnectionCb(connection_failed_cb conn_failed){
|
1411 |
|
1412 |
if (conn_failed == NULL) |
1413 |
error("ML: Register connection_failed_cb: NULL ptr \n");
|
1414 |
else
|
1415 |
failed_Connection_cb = conn_failed; |
1416 |
|
1417 |
} |
1418 |
|
1419 |
void mlRegisterRecvDataCb(receive_data_cb data_cb,unsigned char msgtype){ |
1420 |
|
1421 |
if (msgtype > 126) { |
1422 |
|
1423 |
error |
1424 |
("ML: Could not register recv_data callback. Msgtype is greater then 126 \n");
|
1425 |
|
1426 |
} |
1427 |
|
1428 |
if (data_cb == NULL) { |
1429 |
|
1430 |
error("ML: Register receive data callback: NUll ptr \n ");
|
1431 |
|
1432 |
} else {
|
1433 |
|
1434 |
recvcbbuf[msgtype] = data_cb; |
1435 |
|
1436 |
} |
1437 |
|
1438 |
} |
1439 |
|
1440 |
void mlCloseSocket(socketID_handle socketID){
|
1441 |
|
1442 |
free(socketID); |
1443 |
|
1444 |
} |
1445 |
|
1446 |
void keepalive_fn(evutil_socket_t fd, short what, void *arg) { |
1447 |
socketID_handle peer = arg; |
1448 |
|
1449 |
int con_id = mlConnectionExist(peer, false); |
1450 |
if (con_id < 0 || connectbuf[con_id]->defaultSendParams.keepalive <= 0) { |
1451 |
/* Connection fell from under us or keepalive was disabled */
|
1452 |
free(arg); |
1453 |
return;
|
1454 |
} |
1455 |
|
1456 |
/* do what we gotta do */
|
1457 |
if ( connectbuf[con_id]->status == READY) {
|
1458 |
char keepaliveMsg[32] = ""; |
1459 |
sprintf(keepaliveMsg, "KEEPALIVE %d", connectbuf[con_id]->keepalive_seq++);
|
1460 |
send_msg(con_id, MSG_TYPE_ML_KEEPALIVE, keepaliveMsg, 1 + strlen(keepaliveMsg), false, |
1461 |
&(connectbuf[con_id]->defaultSendParams)); |
1462 |
} |
1463 |
|
1464 |
/* re-schedule */
|
1465 |
struct timeval t = { 0,0 }; |
1466 |
t.tv_sec = connectbuf[con_id]->defaultSendParams.keepalive; |
1467 |
if (connectbuf[con_id]->defaultSendParams.keepalive)
|
1468 |
event_base_once(base, -1, EV_TIMEOUT, keepalive_fn, peer, &t);
|
1469 |
} |
1470 |
|
1471 |
void setupKeepalive(int conn_id) { |
1472 |
/* Save the peer's address for us */
|
1473 |
socketID_handle peer = malloc(sizeof(socket_ID));
|
1474 |
memcpy(peer, &connectbuf[conn_id]->external_socketID, sizeof(socket_ID));
|
1475 |
|
1476 |
struct timeval t = { 0,0 }; |
1477 |
t.tv_sec = connectbuf[conn_id]->defaultSendParams.keepalive; |
1478 |
|
1479 |
if (connectbuf[conn_id]->defaultSendParams.keepalive)
|
1480 |
event_base_once(base, -1, EV_TIMEOUT, keepalive_fn, peer, &t);
|
1481 |
} |
1482 |
|
1483 |
/* connection functions */
|
1484 |
int mlOpenConnection(socketID_handle external_socketID,receive_connection_cb connection_cb,void *arg, const send_params defaultSendParams){ |
1485 |
|
1486 |
int con_id;
|
1487 |
if (external_socketID == NULL) { |
1488 |
error("ML: cannot open connection: one of the socketIDs is NULL\n");
|
1489 |
return -1; |
1490 |
} |
1491 |
if (NAT_traversal == false) { |
1492 |
error("ML: cannot open connection: NAT traversal for socketID still in progress\n");
|
1493 |
return -1; |
1494 |
} |
1495 |
if (connection_cb == NULL) { |
1496 |
error("ML: cannot open connection: connection_cb is NULL\n");
|
1497 |
return -1; |
1498 |
} |
1499 |
|
1500 |
// check if that connection already exist
|
1501 |
|
1502 |
con_id = mlConnectionExist(external_socketID, false);
|
1503 |
if (con_id >= 0) { |
1504 |
// overwrite defaultSendParams
|
1505 |
bool newKeepalive =
|
1506 |
connectbuf[con_id]->defaultSendParams.keepalive == 0 && defaultSendParams.keepalive != 0; |
1507 |
connectbuf[con_id]->defaultSendParams = defaultSendParams; |
1508 |
if (newKeepalive) setupKeepalive(con_id);
|
1509 |
// if so check if it is ready to use
|
1510 |
if (connectbuf[con_id]->status == READY) {
|
1511 |
// if so use the callback immediately
|
1512 |
(connection_cb) (con_id, arg); |
1513 |
|
1514 |
// otherwise just write the connection cb and the arg pointer
|
1515 |
// into the connection struct
|
1516 |
} else {
|
1517 |
struct receive_connection_cb_list *temp;
|
1518 |
temp = malloc(sizeof(struct receive_connection_cb_list)); |
1519 |
temp->next = NULL;
|
1520 |
temp->connection_cb = connection_cb; |
1521 |
temp->arg = arg; |
1522 |
if(connectbuf[con_id]->connection_last != NULL) { |
1523 |
connectbuf[con_id]->connection_last->next = temp; |
1524 |
connectbuf[con_id]->connection_last = temp; |
1525 |
} else
|
1526 |
connectbuf[con_id]->connection_last = connectbuf[con_id]->connection_head = temp; |
1527 |
} |
1528 |
return con_id;
|
1529 |
} |
1530 |
// make entry in connection_establishment array
|
1531 |
for (con_id = 0; con_id < CONNECTBUFSIZE; con_id++) { |
1532 |
if (connectbuf[con_id] == NULL) { |
1533 |
connectbuf[con_id] = (connect_data *) malloc(sizeof(connect_data));
|
1534 |
memset(connectbuf[con_id],0,sizeof(connect_data)); |
1535 |
connectbuf[con_id]->starttime = time(NULL);
|
1536 |
memcpy(&connectbuf[con_id]->external_socketID, external_socketID, sizeof(socket_ID));
|
1537 |
connectbuf[con_id]->pmtusize = DSLSLIM; |
1538 |
connectbuf[con_id]->timeout_event = NULL;
|
1539 |
connectbuf[con_id]->status = INVITE; |
1540 |
connectbuf[con_id]->seqnr = 0;
|
1541 |
connectbuf[con_id]->internal_connect = !compare_external_address_socketIDs(external_socketID, &local_socketID); |
1542 |
connectbuf[con_id]->connectionID = con_id; |
1543 |
|
1544 |
connectbuf[con_id]->connection_head = connectbuf[con_id]->connection_last = malloc(sizeof(struct receive_connection_cb_list)); |
1545 |
connectbuf[con_id]->connection_last->next = NULL;
|
1546 |
connectbuf[con_id]->connection_last->connection_cb = connection_cb; |
1547 |
connectbuf[con_id]->connection_last->arg = arg; |
1548 |
connectbuf[con_id]->external_connectionID = -1;
|
1549 |
|
1550 |
connectbuf[con_id]->defaultSendParams = defaultSendParams; |
1551 |
if (defaultSendParams.keepalive) setupKeepalive(con_id);
|
1552 |
break;
|
1553 |
} |
1554 |
} //end of for
|
1555 |
|
1556 |
if (con_id == CONNECTBUFSIZE) {
|
1557 |
error("ML: Could not open connection: connection buffer full\n");
|
1558 |
return -1; |
1559 |
} |
1560 |
|
1561 |
// create and send a connection message
|
1562 |
info("ML:Sending INVITE to %s (lconn:%d)\n",conid_to_string(con_id), con_id);
|
1563 |
send_conn_msg_with_pmtu_discovery(con_id, connectbuf[con_id]->pmtusize, INVITE); |
1564 |
|
1565 |
return con_id;
|
1566 |
|
1567 |
} |
1568 |
|
1569 |
void mlCloseConnection(const int connectionID){ |
1570 |
|
1571 |
// remove it from the connection array
|
1572 |
if(connectbuf[connectionID]) {
|
1573 |
if(connectbuf[connectionID]->ctrl_msg_buf) {
|
1574 |
free(connectbuf[connectionID]->ctrl_msg_buf); |
1575 |
} |
1576 |
// remove related events
|
1577 |
if (connectbuf[connectionID]->timeout_event) {
|
1578 |
event_del(connectbuf[connectionID]->timeout_event); |
1579 |
event_free(connectbuf[connectionID]->timeout_event); |
1580 |
connectbuf[connectionID]->timeout_event = NULL;
|
1581 |
} |
1582 |
free(connectbuf[connectionID]); |
1583 |
connectbuf[connectionID] = NULL;
|
1584 |
} |
1585 |
|
1586 |
} |
1587 |
|
1588 |
void mlSendData(const int connectionID,char *sendbuf,int bufsize,unsigned char msgtype,send_params *sParams){ |
1589 |
|
1590 |
if (connectionID < 0) { |
1591 |
error("ML: send data failed: connectionID does not exist\n");
|
1592 |
return;
|
1593 |
} |
1594 |
|
1595 |
if (connectbuf[connectionID] == NULL) { |
1596 |
error("ML: send data failed: connectionID does not exist\n");
|
1597 |
return;
|
1598 |
} |
1599 |
if (connectbuf[connectionID]->status != READY) {
|
1600 |
error("ML: send data failed: connection is not active\n");
|
1601 |
return;
|
1602 |
} |
1603 |
|
1604 |
if (sParams == NULL) { |
1605 |
sParams = &(connectbuf[connectionID]->defaultSendParams); |
1606 |
} |
1607 |
|
1608 |
send_msg(connectionID, msgtype, sendbuf, bufsize, false, sParams);
|
1609 |
|
1610 |
} |
1611 |
|
1612 |
/* transmit data functions */
|
1613 |
int mlSendAllData(const int connectionID,send_all_data_container *container,int nr_entries,unsigned char msgtype,send_params *sParams){ |
1614 |
|
1615 |
if (nr_entries < 1 || nr_entries > 5) { |
1616 |
|
1617 |
error |
1618 |
("ML : sendALlData : nr_enties is not between 1 and 5 \n ");
|
1619 |
return 0; |
1620 |
|
1621 |
} else {
|
1622 |
|
1623 |
if (nr_entries == 1) { |
1624 |
|
1625 |
mlSendData(connectionID, container->buffer_1, |
1626 |
container->length_1, msgtype, sParams); |
1627 |
|
1628 |
return 1; |
1629 |
|
1630 |
} else if (nr_entries == 2) { |
1631 |
|
1632 |
int buflen = container->length_1 + container->length_2;
|
1633 |
char buf[buflen];
|
1634 |
memcpy(buf, container->buffer_1, container->length_1); |
1635 |
memcpy(&buf[container->length_1], container->buffer_2, |
1636 |
container->length_2); |
1637 |
mlSendData(connectionID, buf, buflen, msgtype, sParams); |
1638 |
|
1639 |
return 1; |
1640 |
|
1641 |
} else if (nr_entries == 3) { |
1642 |
|
1643 |
int buflen =
|
1644 |
container->length_1 + container->length_2 + |
1645 |
container->length_3; |
1646 |
char buf[buflen];
|
1647 |
memcpy(buf, container->buffer_1, container->length_1); |
1648 |
memcpy(&buf[container->length_1], container->buffer_2, |
1649 |
container->length_2); |
1650 |
memcpy(&buf[container->length_2], container->buffer_3, |
1651 |
container->length_3); |
1652 |
mlSendData(connectionID, buf, buflen, msgtype, sParams); |
1653 |
|
1654 |
|
1655 |
return 1; |
1656 |
|
1657 |
} else if (nr_entries == 4) { |
1658 |
|
1659 |
int buflen =
|
1660 |
container->length_1 + container->length_2 + |
1661 |
container->length_3 + container->length_4; |
1662 |
char buf[buflen];
|
1663 |
memcpy(buf, container->buffer_1, container->length_1); |
1664 |
memcpy(&buf[container->length_1], container->buffer_2, |
1665 |
container->length_2); |
1666 |
memcpy(&buf[container->length_2], container->buffer_3, |
1667 |
container->length_3); |
1668 |
memcpy(&buf[container->length_3], container->buffer_4, |
1669 |
container->length_4); |
1670 |
mlSendData(connectionID, buf, buflen, msgtype, sParams); |
1671 |
|
1672 |
return 1; |
1673 |
|
1674 |
} else {
|
1675 |
|
1676 |
int buflen =
|
1677 |
container->length_1 + container->length_2 + |
1678 |
container->length_3 + container->length_4 + |
1679 |
container->length_5; |
1680 |
char buf[buflen];
|
1681 |
memcpy(buf, container->buffer_1, container->length_1); |
1682 |
memcpy(&buf[container->length_1], container->buffer_2, |
1683 |
container->length_2); |
1684 |
memcpy(&buf[container->length_2], container->buffer_3, |
1685 |
container->length_3); |
1686 |
memcpy(&buf[container->length_3], container->buffer_4, |
1687 |
container->length_4); |
1688 |
memcpy(&buf[container->length_4], container->buffer_5, |
1689 |
container->length_5); |
1690 |
mlSendData(connectionID, buf, buflen, msgtype, sParams); |
1691 |
|
1692 |
return 1; |
1693 |
} |
1694 |
|
1695 |
} |
1696 |
|
1697 |
} |
1698 |
|
1699 |
int mlRecvData(const int connectionID,char *recvbuf,int *bufsize,recv_params *rParams){ |
1700 |
|
1701 |
//TODO yet to be converted
|
1702 |
return 0; |
1703 |
#if 0
|
1704 |
if (rParams == NULL) {
|
1705 |
error("ML: recv_data failed: recv_params is a NULL ptr\n");
|
1706 |
return 0;
|
1707 |
} else {
|
1708 |
|
1709 |
info("ML: recv data called \n");
|
1710 |
|
1711 |
int i = 0;
|
1712 |
int returnValue = 0;
|
1713 |
double timeout = (double) recv_timeout.tv_sec;
|
1714 |
time_t endtime = time(NULL);
|
1715 |
|
1716 |
for (i = 0; i < RECVDATABUFSIZE; i++) {
|
1717 |
|
1718 |
if (recvdatabuf[i] != NULL) {
|
1719 |
|
1720 |
if (recvdatabuf[i]->connectionID == connectionID) {
|
1721 |
|
1722 |
info("ML: recv data has entry \n");
|
1723 |
|
1724 |
double timepass = difftime(endtime, recvdatabuf[i]->starttime);
|
1725 |
|
1726 |
// check if the specified connection has data and it
|
1727 |
// is complete
|
1728 |
// check the data seqnr
|
1729 |
// if(connectionID == recvdatabuf[i]->connectionID &&
|
1730 |
// 1 == recvdatabuf[i]->status){
|
1731 |
|
1732 |
if (1 == recvdatabuf[i]->status) {
|
1733 |
|
1734 |
// info("transmissionHandler: recv_data set is
|
1735 |
// complete \n" );
|
1736 |
|
1737 |
// debug("debud \n");
|
1738 |
|
1739 |
// exchange the pointers
|
1740 |
int buffersize = 0;
|
1741 |
buffersize = recvdatabuf[i]->bufsize;
|
1742 |
*bufsize = buffersize;
|
1743 |
// recvbuf = recvdatabuf[i]->recvbuf;
|
1744 |
|
1745 |
// info("buffersize %d \n",buffersize);
|
1746 |
memcpy(recvbuf, recvdatabuf[i]->recvbuf,
|
1747 |
buffersize);
|
1748 |
// debug(" recvbuf %s \n",recvbuf );
|
1749 |
|
1750 |
// double nrMissFrags =
|
1751 |
// (double) recvdatabuf[i]->nrFragments /
|
1752 |
// (double) recvdatabuf[i]->recvFragments;
|
1753 |
// int nrMissingFragments = (int) ceil(nrMissFrags);
|
1754 |
|
1755 |
// rParams->nrMissingFragments = nrMissingFragments;
|
1756 |
// rParams->nrFragments = recvdatabuf[i]->nrFragments;
|
1757 |
rParams->msgtype = recvdatabuf[i]->msgtype;
|
1758 |
rParams->connectionID =
|
1759 |
recvdatabuf[i]->connectionID;
|
1760 |
|
1761 |
// break from the loop
|
1762 |
// debug(" recvbuf %s \n ",recvbuf);
|
1763 |
|
1764 |
// double nrMissFrags =
|
1765 |
// (double)recvdatabuf[i]->nrFragments /
|
1766 |
// (double)recvdatabuf[i]->recvFragments;
|
1767 |
// int nrMissingFragments =
|
1768 |
// (int)ceil(nrMissFrags);
|
1769 |
|
1770 |
if(get_Recv_data_inf_cb != NULL) {
|
1771 |
mon_data_inf recv_data_inf;
|
1772 |
|
1773 |
recv_data_inf.remote_socketID = &(connectbuf[connectionID]->external_socketID);
|
1774 |
recv_data_inf.buffer = recvdatabuf[i]->recvbuf;
|
1775 |
recv_data_inf.bufSize = recvdatabuf[i]->bufsize;
|
1776 |
recv_data_inf.msgtype = recvdatabuf[i]->msgtype;
|
1777 |
// recv_data_inf.monitoringHeaderType = recvdatabuf[i]->monitoringHeaderType;
|
1778 |
// recv_data_inf.monitoringDataHeader = recvdatabuf[i]->monitoringDataHeader;
|
1779 |
gettimeofday(&recv_data_inf.arrival_time, NULL);
|
1780 |
recv_data_inf.firstPacketArrived = recvdatabuf[i]->firstPacketArrived;
|
1781 |
recv_data_inf.nrMissingFragments = nrMissingFragments;
|
1782 |
recv_data_inf.nrFragments = recvdatabuf[i]->nrFragments;
|
1783 |
recv_data_inf.priority = false;
|
1784 |
recv_data_inf.padding = false;
|
1785 |
recv_data_inf.confirmation = false;
|
1786 |
recv_data_inf.reliable = false;
|
1787 |
|
1788 |
// send data recv callback to monitoring module
|
1789 |
|
1790 |
(get_Recv_data_inf_cb) ((void *) &recv_data_inf);
|
1791 |
}
|
1792 |
|
1793 |
|
1794 |
// free the allocated memory
|
1795 |
free(recvdatabuf[i]);
|
1796 |
recvdatabuf[i] = NULL;
|
1797 |
|
1798 |
returnValue = 1;
|
1799 |
break;
|
1800 |
|
1801 |
}
|
1802 |
|
1803 |
if (recvdatabuf[i] != NULL) {
|
1804 |
|
1805 |
if (timepass > timeout) {
|
1806 |
|
1807 |
info("ML: recv_data timeout called \n");
|
1808 |
|
1809 |
// some data about the missing chunks should
|
1810 |
// be added here
|
1811 |
// exchange the pointers
|
1812 |
int buffersize = 0;
|
1813 |
buffersize = recvdatabuf[i]->bufsize;
|
1814 |
*bufsize = buffersize;
|
1815 |
// recvbuf = recvdatabuf[i]->recvbuf;
|
1816 |
|
1817 |
double nrMissFrags =
|
1818 |
(double) recvdatabuf[i]->nrFragments /
|
1819 |
(double) recvdatabuf[i]->recvFragments;
|
1820 |
int nrMissingFragments =
|
1821 |
(int) ceil(nrMissFrags);
|
1822 |
|
1823 |
// debug(" recvbuf %s \n",recvbuf );
|
1824 |
|
1825 |
memcpy(recvbuf, recvdatabuf[i]->recvbuf,
|
1826 |
buffersize);
|
1827 |
|
1828 |
rParams->nrMissingFragments =
|
1829 |
nrMissingFragments;
|
1830 |
rParams->nrFragments =
|
1831 |
recvdatabuf[i]->nrFragments;
|
1832 |
rParams->msgtype = recvdatabuf[i]->msgtype;
|
1833 |
rParams->connectionID =
|
1834 |
recvdatabuf[i]->connectionID;
|
1835 |
|
1836 |
if(get_Recv_data_inf_cb != NULL) {
|
1837 |
mon_data_inf recv_data_inf;
|
1838 |
|
1839 |
recv_data_inf.remote_socketID = &(connectbuf[connectionID]->external_socketID);
|
1840 |
recv_data_inf.buffer = recvdatabuf[i]->recvbuf;
|
1841 |
recv_data_inf.bufSize = recvdatabuf[i]->bufsize;
|
1842 |
recv_data_inf.msgtype = recvdatabuf[i]->msgtype;
|
1843 |
recv_data_inf.monitoringHeaderType = recvdatabuf[i]->monitoringHeaderType;
|
1844 |
recv_data_inf.monitoringDataHeader = recvdatabuf[i]->monitoringDataHeader;
|
1845 |
gettimeofday(&recv_data_inf.arrival_time, NULL);
|
1846 |
recv_data_inf.firstPacketArrived = recvdatabuf[i]->firstPacketArrived;
|
1847 |
recv_data_inf.nrMissingFragments = nrMissingFragments;
|
1848 |
recv_data_inf.nrFragments = recvdatabuf[i]->nrFragments;
|
1849 |
recv_data_inf.priority = false;
|
1850 |
recv_data_inf.padding = false;
|
1851 |
recv_data_inf.confirmation = false;
|
1852 |
recv_data_inf.reliable = false;
|
1853 |
|
1854 |
// send data recv callback to monitoring module
|
1855 |
|
1856 |
(get_Recv_data_inf_cb) ((void *) &recv_data_inf);
|
1857 |
}
|
1858 |
|
1859 |
// free the allocated memory
|
1860 |
free(recvdatabuf[i]);
|
1861 |
recvdatabuf[i] = NULL;
|
1862 |
|
1863 |
returnValue = 1;
|
1864 |
break;
|
1865 |
|
1866 |
}
|
1867 |
}
|
1868 |
|
1869 |
}
|
1870 |
|
1871 |
}
|
1872 |
// debug("2 recvbuf %s \n ",recvbuf);
|
1873 |
}
|
1874 |
return returnValue;
|
1875 |
}
|
1876 |
#endif
|
1877 |
|
1878 |
} |
1879 |
|
1880 |
int mlSocketIDToString(socketID_handle socketID,char* socketID_string, size_t len){ |
1881 |
|
1882 |
char internal_addr[INET_ADDRSTRLEN];
|
1883 |
char external_addr[INET_ADDRSTRLEN];
|
1884 |
|
1885 |
assert(socketID); |
1886 |
|
1887 |
inet_ntop(AF_INET, &(socketID->internal_addr.udpaddr.sin_addr.s_addr), internal_addr, INET_ADDRSTRLEN); |
1888 |
inet_ntop(AF_INET, &(socketID->external_addr.udpaddr.sin_addr.s_addr), external_addr, INET_ADDRSTRLEN); |
1889 |
|
1890 |
snprintf(socketID_string,len,"%s:%d-%s:%d", internal_addr, ntohs(socketID->internal_addr.udpaddr.sin_port),
|
1891 |
external_addr, ntohs(socketID->external_addr.udpaddr.sin_port)); |
1892 |
return 0; |
1893 |
|
1894 |
} |
1895 |
|
1896 |
int mlStringToSocketID(const char* socketID_string, socketID_handle socketID){ |
1897 |
|
1898 |
//@TODO add checks against malformed string
|
1899 |
char external_addr[INET_ADDRSTRLEN];
|
1900 |
int external_port;
|
1901 |
char internal_addr[INET_ADDRSTRLEN];
|
1902 |
int internal_port;
|
1903 |
|
1904 |
char *pch;
|
1905 |
char *s = strdup(socketID_string);
|
1906 |
|
1907 |
//replace ':' with a blank
|
1908 |
pch=strchr(s,':');
|
1909 |
while (pch!=NULL){ |
1910 |
*pch = ' ';
|
1911 |
pch=strchr(pch+1,':'); |
1912 |
} |
1913 |
pch=strchr(s,'-');
|
1914 |
if(pch) *pch = ' '; |
1915 |
|
1916 |
sscanf(s,"%s %d %s %d", internal_addr, &internal_port,
|
1917 |
external_addr, &external_port); |
1918 |
|
1919 |
//set structure to 0, we initialize each byte, since it will be sent on the net later
|
1920 |
memset(socketID, 0, sizeof(struct _socket_ID)); |
1921 |
|
1922 |
if(inet_pton(AF_INET, internal_addr, &(socketID->internal_addr.udpaddr.sin_addr)) == 0) |
1923 |
return EINVAL;
|
1924 |
socketID->internal_addr.udpaddr.sin_family = AF_INET; |
1925 |
socketID->internal_addr.udpaddr.sin_port = htons(internal_port); |
1926 |
|
1927 |
|
1928 |
if(inet_pton(AF_INET, external_addr, &(socketID->external_addr.udpaddr.sin_addr)) ==0) |
1929 |
return EINVAL;
|
1930 |
socketID->external_addr.udpaddr.sin_family = AF_INET; |
1931 |
socketID->external_addr.udpaddr.sin_port = htons(external_port); |
1932 |
|
1933 |
free(s); |
1934 |
return 0; |
1935 |
|
1936 |
} |
1937 |
|
1938 |
int mlGetConnectionStatus(int connectionID){ |
1939 |
|
1940 |
if(connectbuf[connectionID])
|
1941 |
return connectbuf[connectionID]->status == READY;
|
1942 |
return -1; |
1943 |
|
1944 |
} |
1945 |
|
1946 |
|
1947 |
int mlConnectionExist(socketID_handle socketID, bool ready){ |
1948 |
|
1949 |
/*
|
1950 |
* check if another connection for the external connectionID exist
|
1951 |
* that was established \ within the last 2 seconds
|
1952 |
*/
|
1953 |
int i;
|
1954 |
for (i = 0; i < CONNECTBUFSIZE; i++) |
1955 |
if (connectbuf[i] != NULL) |
1956 |
if (mlCompareSocketIDs(&(connectbuf[i]->external_socketID), socketID) == 0) { |
1957 |
if (ready) return (connectbuf[i]->status == READY ? i : -1);; |
1958 |
return i;
|
1959 |
} |
1960 |
|
1961 |
return -1; |
1962 |
|
1963 |
} |
1964 |
|
1965 |
//Added by Robert Birke as comodity functions
|
1966 |
|
1967 |
//int mlPrintSocketID(socketID_handle socketID) {
|
1968 |
// char str[SOCKETID_STRING_SIZE];
|
1969 |
// mlSocketIDToString(socketID, str, sizeof(str));
|
1970 |
// printf(stderr,"int->%s<-ext\n",str);
|
1971 |
//}
|
1972 |
|
1973 |
/*
|
1974 |
* hash code of a socketID
|
1975 |
* TODO might think of a better way
|
1976 |
*/
|
1977 |
int mlHashSocketID(socketID_handle sock) {
|
1978 |
return sock->internal_addr.udpaddr.sin_port +
|
1979 |
sock->external_addr.udpaddr.sin_port; |
1980 |
} |
1981 |
|
1982 |
int mlCompareSocketIDs(socketID_handle sock1, socketID_handle sock2) {
|
1983 |
|
1984 |
assert(sock1 && sock2); |
1985 |
|
1986 |
/*
|
1987 |
* compare internal addr
|
1988 |
*/
|
1989 |
if(sock1 == NULL || sock2 == NULL) |
1990 |
return 1; |
1991 |
|
1992 |
if (sock1->internal_addr.udpaddr.sin_addr.s_addr !=
|
1993 |
sock2->internal_addr.udpaddr.sin_addr.s_addr) |
1994 |
return 1; |
1995 |
|
1996 |
if (sock1->internal_addr.udpaddr.sin_port !=
|
1997 |
sock2->internal_addr.udpaddr.sin_port) |
1998 |
return 1; |
1999 |
|
2000 |
/*
|
2001 |
* compare external addr
|
2002 |
*/
|
2003 |
if (sock1->external_addr.udpaddr.sin_addr.s_addr !=
|
2004 |
sock2->external_addr.udpaddr.sin_addr.s_addr) |
2005 |
return 1; |
2006 |
|
2007 |
if (sock1->external_addr.udpaddr.sin_port !=
|
2008 |
sock2->external_addr.udpaddr.sin_port) |
2009 |
return 1; |
2010 |
|
2011 |
return 0; |
2012 |
} |
2013 |
|
2014 |
int mlCompareSocketIDsByPort(socketID_handle sock1, socketID_handle sock2)
|
2015 |
{ |
2016 |
if(sock1 == NULL || sock2 == NULL) |
2017 |
return 1; |
2018 |
|
2019 |
if (sock1->internal_addr.udpaddr.sin_port !=
|
2020 |
sock2->internal_addr.udpaddr.sin_port) |
2021 |
return 1; |
2022 |
|
2023 |
if (sock1->external_addr.udpaddr.sin_port !=
|
2024 |
sock2->external_addr.udpaddr.sin_port) |
2025 |
return 1; |
2026 |
return 0; |
2027 |
} |
2028 |
|
2029 |
int mlGetPathMTU(int ConnectionId) { |
2030 |
if(ConnectionId < 0 || ConnectionId >= CONNECTBUFSIZE) |
2031 |
return -1; |
2032 |
if (connectbuf[ConnectionId] != NULL) |
2033 |
return connectbuf[ConnectionId]->pmtusize;
|
2034 |
return -1; |
2035 |
} |
2036 |
|
2037 |
/**************************** END of GENERAL functions *************************/
|
2038 |
|
2039 |
/**************************** NAT functions *************************/
|
2040 |
|
2041 |
/* setter */
|
2042 |
void mlSetStunServer(const int port,const char *ipaddr){ |
2043 |
|
2044 |
stun_server.sin_family = AF_INET; |
2045 |
if (ipaddr == NULL) |
2046 |
stun_server.sin_addr.s_addr = htonl(INADDR_NONE); |
2047 |
else
|
2048 |
stun_server.sin_addr.s_addr = resolve(ipaddr); |
2049 |
stun_server.sin_port = htons(port); |
2050 |
|
2051 |
} |
2052 |
|
2053 |
int mlGetExternalIP(char* external_addr){ |
2054 |
|
2055 |
socketaddrgen udpgen; |
2056 |
struct sockaddr_in udpaddr;
|
2057 |
|
2058 |
udpgen = local_socketID.external_addr; |
2059 |
udpaddr = udpgen.udpaddr; |
2060 |
|
2061 |
inet_ntop(AF_INET, &(udpaddr.sin_addr), external_addr, |
2062 |
INET_ADDRSTRLEN); |
2063 |
|
2064 |
if (external_addr == NULL) { |
2065 |
|
2066 |
return -1; |
2067 |
|
2068 |
} else {
|
2069 |
|
2070 |
return 0; |
2071 |
|
2072 |
} |
2073 |
|
2074 |
} |
2075 |
|
2076 |
/**************************** END of NAT functions *************************/
|