149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
#include "../basic.h"
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#include <unistd.h>
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void sigpipeaction (int signal){
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//fprintf(stderr, "Sigpipe catturato\n");
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}
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typedef struct message {
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char data [50];
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char nome [50];
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char voto [50];
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struct sockaddr_in addresses;
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unsigned int addresses_len;
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}t_message;
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int main(int argc, char **argv) {
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struct sigaction sigpipestructure;
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sigpipestructure.sa_handler = sigpipeaction;
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sigpipestructure.sa_flags = 0;
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sigaction (SIGPIPE, &sigpipestructure, NULL);
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int sockfd;
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struct sockaddr_in servaddr;
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if (argc != 3){
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printf("usage: daytimecli <indirizzoIP> <porta> \n");
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exit(0);
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}
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if( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ){
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printf("socket error\n");
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exit(0);
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}
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bzero(&servaddr, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(atoi(argv[2])); /* server port */
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if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
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printf("inet_pton error for %s\n", argv[1]);
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exit(0);
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}
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if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
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printf("connect error\n");
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exit(0);
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}
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int ridden;
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int written;
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t_message m;
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m.addresses_len = sizeof (m.addresses);
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// get local address after connect
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getsockname(sockfd, (struct sockaddr *) &(m.addresses) , &(m.addresses_len) );
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// getpeername per ottenere invece informazioni dall'altro lato di una connessione
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// send local address to the server
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for (written = write (sockfd, &m, sizeof (m) ); written == -1; written = write (sockfd, &m, sizeof (m)) ){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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//// welcome from server - first message
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for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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fprintf(stdout,"Server: %s\n",m.data);// answer from server
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char line [1000];
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char line_data [50];
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char line_nome [50];
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char line_voto [50];
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for(; ;){
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fprintf(stdout, "Inserisci comando: ");
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fscanf (stdin,"%999[^\n]%*c",line);
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sscanf (line, "%s", line_data);
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if (strcmp("AGGIUNGI",line_data) == 0 || strcmp("VERIFICA",line_data) == 0){
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if (strcmp("AGGIUNGI",line_data) == 0 ){
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sprintf(m.data,"AGGIUNGI");
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sprintf(line_nome,"def");
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sprintf(line_voto,"def");
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sscanf (line, "%*s %s %s", line_nome,line_voto);
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if (strcmp(line_nome,"def") == 0 || strcmp(line_voto,"def") == 0){
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fprintf(stdout,"Comando invalido\n");
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continue;
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}else{
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sprintf(m.nome,"%s",line_nome);
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sprintf(m.voto,"%s",line_voto);
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}
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} else {
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sprintf(m.data,"VERIFICA");
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sprintf(line_nome,"def");
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sscanf (line, "%*s %s ", line_nome);
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if (strcmp(line_nome,"def") == 0 ){
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fprintf(stdout,"Comando invalido\n");
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continue;
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}else{
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sprintf(m.nome,"%s",line_nome);
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}
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}
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for (written = write (sockfd, &m, sizeof (m) ); written == -1; written = write (sockfd, &m, sizeof (m)) ){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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fprintf(stdout,"Server: %s\n",m.data);// answer from server
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} else {
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sprintf(m.data,"Bye");
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for (written = write (sockfd, &m, sizeof (m) ); written == -1; written = write (sockfd, &m, sizeof (m)) ){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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fprintf(stdout,"Server: %s\n",m.data);// answer from server
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break;
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}
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}
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exit(0);
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}
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