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[done] middleware `multicastPlane` FUNC + plane code for connection

This commit is contained in:
xdrm-brackets 2017-04-12 09:30:42 +02:00
parent f1fca736bd
commit e1e8d56d0c
3 changed files with 83 additions and 9 deletions
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4
central-manager/lib/data.h
View File

@ -40,14 +40,14 @@
}; };
#define BINDHDR_LEN ( sizeof(char)*16+sizeof(unsigned short) ) #define BINDHDR_LEN ( sizeof(char)*(1+INET_ADDRSTRLEN)+sizeof(unsigned short) )
#define BINDHEAD_CTL 0x01 // is command terminal (else: view terminal) #define BINDHEAD_CTL 0x01 // is command terminal (else: view terminal)
#define BINDHEAD_SCK 0x02 // ask for com socket #define BINDHEAD_SCK 0x02 // ask for com socket
#define BINDHEAD_TCP 0x04 // ask TCP instead of UDP #define BINDHEAD_TCP 0x04 // ask TCP instead of UDP
struct bind_header{ struct bind_header{
char flags; char flags;
char addr[15]; char addr[INET_ADDRSTRLEN];
unsigned short port; unsigned short port;
}; };

74
central-manager/lib/local/middleware.c
View File

@ -11,7 +11,77 @@
int multicastPlanes(struct middleware_arg* arg){ return -2; } int multicastPlanes(struct middleware_arg* arg){
/* [0] Initialisation
=========================================================*/
struct sockaddr_in clientInfo; // contiendra les infos client
socklen_t len; // taille de la socket
int read; // compteurs
char buffer[MAX_BUF_LEN+1]; // buffer requête
struct bind_header request; // requête parsée
/* 1. On attends une connection UDP */
len = sizeof(struct sockaddr_in);
read = recvfrom(arg->listenSock, buffer, MAX_BUF_LEN, 0, (struct sockaddr*) &clientInfo, &len);
/* 2. Si erreur reception ou taille incorrecte -> retour à l'écoute */
if( read < BINDHDR_LEN ){
if( DEBUGMOD&BUF ) printf("{%s} read('%s') = %d bytes (expected: %d)\n", arg->entity, buffer, read, (int) (BINDHDR_LEN) );
return -1;
}
/* 3. On récupère l'adresse IP du client */
if( DEBUGMOD&SCK ) printf("{%s} %s:%d connecté\n", arg->entity, inet_ntoa(clientInfo.sin_addr), ntohs(clientInfo.sin_port));
/* [1] Gestion de la requête
=========================================================*/
/* 1. On parse la requête */
memcpy(&request.flags, buffer, sizeof(char));
memcpy(&request.addr, buffer+sizeof(char), sizeof(char)*15);
memcpy(&request.port, buffer+sizeof(char)*16, sizeof(unsigned short));
printf("{%s} received: bind_header{flag = %d; addr = '%s'; port = %d}\n", arg->entity, (int) request.flags, request.addr, request.port);
/* (1) Envoi socket de communication (TCP)
---------------------------------------------------------*/
/* 1. Si on veut un port de communicatin */
if( request.flags&BINDHEAD_SCK ){
strcpy(request.addr, SERV_HOST);
request.port = TCP_LIST;
}
/* [2] Envoi de la réponse
=========================================================*/
/* 1. On sérialise la réponse */
bzero(buffer, MAX_BUF_LEN);
memcpy(buffer, &request.flags, sizeof(char));
memcpy(buffer+sizeof(char), &request.addr, sizeof(char)*INET_ADDRSTRLEN);
memcpy(buffer+sizeof(char)*(1+INET_ADDRSTRLEN), &request.port, sizeof(unsigned short));
/* 2. On envoie la réponse*/
len = sizeof(struct sockaddr_in);
if( sendto(arg->listenSock, buffer, BINDHDR_LEN/sizeof(char) + 1, 0, (struct sockaddr*) &clientInfo, len) < 0 ){
printf("{%s} Impossible de répondre au client!\n", arg->entity);
return -2;
}
printf("{%s} sent: bind_header{flag = %d; addr = '%s'; port = %d}\n", arg->entity, (int) request.flags, request.addr, request.port);
return 0;
}
int multicastTerminal(struct middleware_arg* arg){ int multicastTerminal(struct middleware_arg* arg){
@ -92,7 +162,7 @@ int multicastTerminal(struct middleware_arg* arg){
} }
/* [4] Envoi de la réponse /* [2] Envoi de la réponse
=========================================================*/ =========================================================*/
/* 1. On sérialise la réponse */ /* 1. On sérialise la réponse */
bzero(buffer, MAX_BUF_LEN); bzero(buffer, MAX_BUF_LEN);

14
plane/plane.c
View File

@ -32,6 +32,7 @@ int open_communication(){
unsigned short serverPort; // port TCP donné par requête multicast UDP unsigned short serverPort; // port TCP donné par requête multicast UDP
char serverAddr[INET_ADDRSTRLEN+1]; // adresse TCP donné par requête multicast UDP char serverAddr[INET_ADDRSTRLEN+1]; // adresse TCP donné par requête multicast UDP
int status; int status;
const int REQ_SIZE = sizeof(char)*INET_ADDRSTRLEN+sizeof(unsigned short);
/* [1] Socket Multicast UDP /* [1] Socket Multicast UDP
=========================================================*/ =========================================================*/
@ -46,10 +47,11 @@ int open_communication(){
/* (2) Envoi séquence initialisation avion /* (2) Envoi séquence initialisation avion
---------------------------------------------------------*/ ---------------------------------------------------------*/
/* 1. Construction séquence d'initialisation */ /* 1. Construction séquence d'initialisation */
memcpy(buffer, numero_vol, sizeof(char)*6); // memcpy(buffer, numero_vol, sizeof(char)*6);
strcpy(buffer, "\003000.000.000.000\x01\x00");
/* 2. Envoi séquence */ /* 2. Envoi séquence */
if( sendto(mcast_socket, buffer, MAX_BUF_LEN, 0, (struct sockaddr*) &udp, sizeof(struct sockaddr_in)) < 0 ){ if( sendto(mcast_socket, buffer, REQ_SIZE+1, 0, (struct sockaddr*) &udp, sizeof(struct sockaddr_in)) < 0 ){
close(mcast_socket); close(mcast_socket);
return 0; return 0;
} }
@ -67,14 +69,16 @@ int open_communication(){
} }
/* 3. Vérification taille */ /* 3. Vérification taille */
if( status < sizeof(char)*INET_ADDRSTRLEN+sizeof(unsigned short) ){ if( status < REQ_SIZE ){
close(mcast_socket); close(mcast_socket);
return 0; return 0;
} }
/* 4. On récupère les données */ /* 4. On récupère les données */
memcpy(serverAddr, buffer, sizeof(char)*INET_ADDRSTRLEN ); memcpy(serverAddr, buffer+sizeof(char), sizeof(char)*INET_ADDRSTRLEN );
memcpy(&serverPort, buffer+sizeof(char)*INET_ADDRSTRLEN, sizeof(unsigned short) ); memcpy(&serverPort, buffer+sizeof(char)*(INET_ADDRSTRLEN+1), sizeof(unsigned short) );
printf("bind_header{flags = %d; addr = %s; port = %d;}\n\n", (int) buffer[0], serverAddr, serverPort);