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netrecvUDP.c
92 lines (75 loc) · 2.16 KB
/
netrecvUDP.c
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/*
server.c - interaktiver Netzwerk-Server
*/
# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <unistd.h>
# include <sys/types.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
void err_exit(char *message)
{
perror(message);
exit(1);
}
int main(int argc, char *argv[])
{
static char buffer[1000];
int sock_fd, port, err, length;
socklen_t addr_size;
struct sockaddr_in my_addr, client_addr;
fd_set input_fdset;
if ((argc != 2) || (strcmp(argv[1], "-h") == 0))
{
fprintf(stderr, "Usage: server port\n");
return(1);
}
if (sscanf(argv[1], "%d", &port) != 1)
{
fprintf(stderr, "server: Bad port number.\n");
return(1);
}
/*--- socket() ---*/
sock_fd = socket(AF_INET,SOCK_DGRAM,0);
if (sock_fd == -1) err_exit("server: Can't create new socket");
bzero(&my_addr,sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_addr.s_addr=htonl(INADDR_ANY);
my_addr.sin_port=htons(port);
printf("port = %d\n", port);
/*--- bind() ---*/
err = bind(sock_fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
if (err == -1) err_exit("server: bind() failed");
printf("bindm returned = %d\n", err);
while (1)
{
addr_size = sizeof(struct sockaddr_in);
length = recvfrom(sock_fd, buffer, 256, 0,(struct sockaddr *)&client_addr, &addr_size);
buffer[length]=0;
printf("received: %s\n");
}
close(sock_fd);
return(0);
//int sockfd,n;
//struct sockaddr_in servaddr,cliaddr;
//socklen_t len;
//char mesg[1000];
//sockfd=socket(AF_INET,SOCK_DGRAM,0);
//bzero(&servaddr,sizeof(servaddr));
//servaddr.sin_family = AF_INET;
//servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
//servaddr.sin_port=htons(2345);
//bind(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr));
//for (;;)
//{
// len = sizeof(cliaddr);
// n = recvfrom(sockfd,mesg,1000,0,(struct sockaddr *)&cliaddr,&len);
// printf("-------------------------------------------------------\n");
// mesg[n] = 0;
// printf("Received the following:\n");
// printf("%s",mesg);
// printf("-------------------------------------------------------\n");
//}
}