124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
#ifndef MICTCP_H
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#define MICTCP_H
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <pthread.h>
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#include <sys/time.h>
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/*
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* Etats du protocole (les noms des états sont donnés à titre indicatif
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* et peuvent être modifiés)
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*/
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typedef enum protocol_state
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{
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IDLE, CLOSED, SYN_SENT, SYN_RECEIVED, ESTABLISHED, CLOSING
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} protocol_state;
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/*
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* Mode de démarrage du protocole
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* NB : nécessaire à l’usage de la fonction initialize_components()
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*/
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typedef enum start_mode { CLIENT, SERVER } start_mode;
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/*
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* Structure d’une adresse de socket
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*/
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typedef struct mic_tcp_sock_addr
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{
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char * ip_addr;
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int ip_addr_size;
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unsigned short port;
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} mic_tcp_sock_addr;
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/*
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* Structure d'un socket
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*/
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typedef struct mic_tcp_sock
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{
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int fd; /* descripteur du socket */
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protocol_state state; /* état du protocole */
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mic_tcp_sock_addr addr; /* adresse du socket */
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} mic_tcp_sock;
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/*
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* Structure des données utiles d’un PDU MIC-TCP
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*/
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typedef struct mic_tcp_payload
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{
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char* data; /* données applicatives */
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int size; /* taille des données */
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} mic_tcp_payload;
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/*
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* Structure de l'entête d'un PDU MIC-TCP
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*/
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typedef struct mic_tcp_header
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{
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unsigned short source_port; /* numéro de port source */
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unsigned short dest_port; /* numéro de port de destination */
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unsigned int seq_num; /* numéro de séquence */
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unsigned int ack_num; /* numéro d'acquittement */
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unsigned char syn; /* flag SYN (valeur 1 si activé et 0 si non) */
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unsigned char ack; /* flag ACK (valeur 1 si activé et 0 si non) */
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unsigned char fin; /* flag FIN (valeur 1 si activé et 0 si non) */
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} mic_tcp_header;
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/*
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* Structure d'un PDU MIC-TCP
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*/
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typedef struct mic_tcp_pdu
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{
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mic_tcp_header header ; /* entête du PDU */
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mic_tcp_payload payload; /* charge utile du PDU */
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} mic_tcp_pdu;
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typedef struct app_buffer
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{
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mic_tcp_payload packet;
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struct app_buffer* next;
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unsigned short id;
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} app_buffer;
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/****************************
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* Fonctions de l'interface *
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****************************/
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int mic_tcp_socket(start_mode sm);
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int mic_tcp_bind(int socket, mic_tcp_sock_addr addr);
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int mic_tcp_accept(int socket, mic_tcp_sock_addr* addr);
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int mic_tcp_connect(int socket, mic_tcp_sock_addr addr);
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int mic_tcp_send (int socket, char* mesg, int mesg_size);
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int mic_tcp_recv (int socket, char* mesg, int max_mesg_size);
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void process_received_PDU(mic_tcp_pdu pdu);
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int mic_tcp_close(int socket);
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/**********************
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* Variables globales *
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**********************/
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mic_tcp_sock local_sock_src;
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mic_tcp_sock local_sock_dest;
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unsigned long timer;
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unsigned long RTT1;
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unsigned long RTT2;
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int PE;
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int PA;
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float pourcentage_perte_client;
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float pourcentage_perte_serveur;
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float compteurDT;
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float DTperdu;
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mic_tcp_pdu DT;
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mic_tcp_pdu Syn;
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mic_tcp_pdu Ack;
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mic_tcp_pdu Syn_Ack;
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#endif
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