サーバーと2つのクライアントがあります。同時にクライアントからの異なるファイルにデータを保存したいと思います。現在、2つのクライアントからの同じファイルにデータを保存しています。1つのクライアントがデータを送信した後、2番目のクライアントが送信を開始します。
2つのクライアントが同時にデータを送信するようにしたい。誰でも私を助けることができます...
server.c
void *function1(void *ptr);
typedef struct{
int port_id;
int thread_id;
}conn_id;
int main(int argc, char *argv[])
{
conn_id conn_id1[2];
conn_id1[0].port_id=7350;
conn_id1[0].thread_id=1;
conn_id1[1].port_id=7351;
conn_id1[1].thread_id=2;
conn_id* conn_ptr;
pthread_t thread[2];
int index=0;
for(index=0;index<2;index++){
conn_ptr=&conn_id1[index];
pthread_create(&thread[index],NULL,&function1,(void*)conn_ptr);}
pthread_join(thread[0],NULL);
pthread_join(thread[1],NULL);
return 0;
}
void *function1( void *ptr)
{
//Declaring process variables.
int server_sockfd, client_sockfd;
int server_len ;
int rc ;
conn_id* conn_ptr;
conn_ptr = (conn_id*)ptr;
unsigned client_len;
char revbuf[LENGTH];
struct sockaddr_in server_address;
struct sockaddr_in client_address;
//Remove any old socket and create an unnamed socket for the server.
server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = htons(INADDR_ANY);
server_address.sin_port = htons(conn_ptr->port_id);
server_len = sizeof(server_address);
bzero(&(server_address.sin_zero), 8);
rc = bind(server_sockfd, (struct sockaddr *) &server_address, server_len);
printf("RC from bind = %d\n", rc ) ;
//Create a connection queue and wait for clients
rc = listen(server_sockfd, 5);
printf("RC from listen = %d\n", rc ) ;
client_len = sizeof(client_address);
client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_address, &client_len);
printf("after accept()... client = %s\n", inet_ntoa(client_address.sin_addr)) ;
while(1)
{
/*Receive File from Client */
char* fr_name = "/home/server/Desktop/fr_client.dat";
FILE *fr = fopen(fr_name, "a");
if(fr == NULL)
printf("File %s Cannot be opened file on server.\n", fr_name);
else
{
bzero(revbuf, LENGTH);
int fr_block_sz = 0;
while((fr_block_sz = recv(client_sockfd, revbuf, LENGTH, 0)) > 0)
{
int write_sz = fwrite(revbuf, sizeof(char), fr_block_sz, fr);
if(write_sz < fr_block_sz)
{
error("File write failed on server.\n");
}
bzero(revbuf, LENGTH);
if (fr_block_sz == 0 || fr_block_sz != 512)
{
break;
}
}
if(fr_block_sz < 0)
{
if (errno == EAGAIN)
{
printf("recv() timed out.\n");
}
else
{
fprintf(stderr, "recv() failed due to errno = %d\n", errno);
exit(1);
}
}
printf("Ok received from client!\n");
fclose(fr);
}
/* Call the Script */
system("cd ; chmod +x script.sh ; ./script.sh");
/* Send File to Client */
char* fs_name = "/home/server/Desktop/output.txt";
char sdbuf[LENGTH]; // Send buffer
printf("[Server] Sending %s to the Client...", fs_name);
FILE *fs = fopen(fs_name, "r");
if(fs == NULL)
{
fprintf(stderr, "ERROR: File %s not found on server. (errno = %d)\n", fs_name, errno);
exit(1);
}
bzero(sdbuf, LENGTH);
int fs_block_sz;
while((fs_block_sz = fread(sdbuf, sizeof(char), LENGTH, fs))>0)
{
if(send(client_sockfd, sdbuf, fs_block_sz, 0) < 0)
{
fprintf(stderr, "ERROR: Failed to send file %s. (errno = %d)\n", fs_name, errno);
exit(1);
}
bzero(sdbuf, LENGTH);
}
printf("Ok sent to client!\n");
close(client_sockfd);
printf("[Server] Connection with Client closed. Server will wait now...\n");
while(waitpid(-1, NULL, WNOHANG) > 0);break;
}
}