int main(void)
{
int sockfd;
struct sockaddr_in my_addr;
int sin_size;
sockfd = socket(AF_INET, SOCK_DGRAM, 0); //create socket
if (sockfd <0)
{
printf("error in socket!");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYUDP_PORT);
my_addr.sin_addr.s_addr = INADDR_ANY;//inet_addr("172.0.0.1");
bzero(&(my_addr.sin_zero), 8);
if (bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr)) == -1) { //bind socket
printf("error in binding");
exit(1);
}
while (1)
{
printf("waiting for data\n");
str_ser(sockfd);
}
close(sockfd);
exit(0);
}
int main(int argc, char **argv)
{
int sockfd, con_fd, ret;
struct sockaddr_in my_addr;
struct sockaddr_in their_addr;
int sin_size;
int error_percent; //To store the percent of errors (prob of drop)
// char *buf;
pid_t pid;
if (argc != 2) {
printf("parameters not match");
}
error_percent = atoi(argv[1]);
sockfd = socket(AF_INET, SOCK_STREAM, 0); //create socket
if (sockfd <0)
{
printf("error in socket!");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYTCP_PORT);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);//inet_addr("172.0.0.1");
bzero(&(my_addr.sin_zero), 8);
ret = bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr)); //bind socket
if (ret <0)
{
printf("error in binding");
exit(1);
}
ret = listen(sockfd, BACKLOG); //listen
if (ret <0) {
printf("error in listening");
exit(1);
}
while (1)
{
printf("waiting for data\n");
sin_size = sizeof (struct sockaddr_in);
con_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size); //accept the packet
if (con_fd <0)
{
printf("error in accept\n");
exit(1);
}
if ((pid = fork())==0) // creat acception process
{
close(sockfd);
str_ser(con_fd, &error_percent); //receive packet and response
close(con_fd);
exit(0);
}
else close(con_fd); //parent process
}
close(sockfd);
exit(0);
}
int main(int argc, char **argv)
{
int sockfd, con_fd, ret;
struct sockaddr_in my_addr;
struct sockaddr_in their_addr;
int sin_size;
int error_percentage;
// char *buf;
pid_t pid;
if (argc != 2) {
printf("Pleas input an Error Percentage following function name!\n");
exit(1);
}
error_percentage = atoi(argv[1]);
if (error_percentage > 99 || error_percentage < 0) {
printf("The range of error percentage varies between 0 to 99! Please give a reasonable value!\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0); //create socket
if (sockfd <0)
{
printf("error in socket!");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYTCP_PORT);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);//inet_addr("172.0.0.1");
bzero(&(my_addr.sin_zero), 8);
ret = bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr)); //bind socket
if (ret <0)
{
printf("error in binding");
exit(1);
}
ret = listen(sockfd, BACKLOG); //listen
if (ret <0) {
printf("error in listening");
exit(1);
}
while (1)
{
printf("waiting for data\n");
sin_size = sizeof (struct sockaddr_in);
con_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size); //accept the packet
if (con_fd <0)
{
printf("error in accept\n");
exit(1);
}
if ((pid = fork())==0) // creat acception process
{
close(sockfd);
str_ser(con_fd, error_percentage); //receive packet and response
close(con_fd);
exit(0);
}
else close(con_fd); //parent process
}
close(sockfd);
exit(0);
}
