int main(int argc, char **argv){
printf("\nTaylor:my ifconfig cmd complish use ioctl function\n");
switch(argc){
case 1:
print_all_interface();
break;
case 2:
print_interface_info(argv[1]);
break;
case 3:
if(strcmp(argv[2], "up") == 0)
set_if_up(argv[1]);
else if(strcmp(argv[2], "down") == 0)
set_if_down(argv[2]);
else
set_if_ip(argv[1], argv[2]);
break;
default:
usage();
break;
}
return 0;
}
int main() {
struct interface** ifs;
int i;
ifs = get_interfaces();
i = 0;
for(;;) {
if(ifs[i] == NULL) {
return 0;
}
print_interface_info(ifs[i]);
i++;
}
return 0;
}
int main(int argc, char **argv)
{
if(argc == 2) print_interface_info(argv[1]);
return 0;
}
int
main(int argc, char *argv[]) {
unsigned int portnumber;
unsigned int maxslidewindowsize;
interface_info_t ii[MAX_INTERFACE_INFO] = {0,};
size_t interface_info_len;
fd_set rset, mainset;
int maxfdp1, i, n, mysockfd, is_local, pid, client_sockfd, temp_port, new_client_conn, table_count = 0;
const int do_not_route = 1, on = 1;
char str[INET_ADDRSTRLEN], msg[MAXLINE];
struct sockaddr_in cliaddr, my_recv_addr, my_recv_netmask, cli_conn;
table_t table[1000];
socklen_t len = sizeof(cliaddr);
char filename[4096] = {0,};
bzero(&cliaddr, sizeof(cliaddr));
bzero(&cli_conn, sizeof(cli_conn));
bzero(&my_recv_addr, sizeof(my_recv_addr));
if (readargsfromfile(&portnumber, &maxslidewindowsize) == -1) {
err_quit("Read/parse error from server.in file");
return -1;
}
printf("port num: %d\nmaxslidewinsize:%d\n\n", portnumber, maxslidewindowsize);
build_inferface_info(ii, &interface_info_len, 1, portnumber);
print_interface_info(ii, interface_info_len);
build_fd_set(&mainset, ii, interface_info_len, &maxfdp1);
for ( ; ; ) {
rset = mainset;
Select(maxfdp1, &rset, NULL, NULL, NULL);
for (i = 0; i < interface_info_len; i++) {
if (FD_ISSET(ii[i].sockfd, &rset)) {
printf("Data recieved on %s\n", Sock_ntop((SA*) (ii[i].ip), sizeof(*(ii[i].ip))));
mysockfd = ii[i].sockfd;
my_recv_addr = *(ii[i].ip);
my_recv_netmask = *(ii[i].netmask);
n = Recvfrom(ii[i].sockfd, msg, MAXLINE, 0, (SA*) &cliaddr, &len);
printf("Data recieved from: %s\n", Sock_ntop((SA*) &cliaddr, len));
memcpy(filename, msg, 4096);
if (strchr(filename, '\n'))
*strchr(filename, '\n') = '\0';
printf("Data(Filename):%s\n", msg);
if (checktable(cliaddr, table_count, table) < 0 ) {
printf("Same <ip and port> tried to conected again, not creating new child.\n");
continue;
}
if ((pid = Fork()) == 0) {
// Child
// CLose all other sockets.
for (i = 0; i < interface_info_len; i++)
if (ii[i].sockfd != mysockfd)
close(ii[i].sockfd);
// Find out if client is loopback or local or not.
is_local = find_if_client_local(my_recv_addr, cliaddr, ii, interface_info_len, my_recv_netmask);
if (is_local < 3)
printf("Client host is local\n");
else
printf("Client host is not local\n");
// Create UDP socket to handle file transfer with this client."connection socket"
client_sockfd = Socket(AF_INET, SOCK_DGRAM, 0);
if (is_local < 3)
Setsockopt(client_sockfd, SOL_SOCKET, SO_DONTROUTE, &do_not_route, sizeof(do_not_route));
Setsockopt(client_sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
cli_conn.sin_addr = my_recv_addr.sin_addr;
cli_conn.sin_family = AF_INET;
cli_conn.sin_port = htons(0);
Bind(client_sockfd, (SA *) &cli_conn, sizeof(cli_conn));
len = sizeof(cli_conn);
Getsockname(client_sockfd, (SA*) &cli_conn, &len);
printf("\nConnection socket bound, protocol Address:%s\n", Sock_ntop((SA*) &cli_conn, len));
Connect(client_sockfd, (SA*) &cliaddr, sizeof(cliaddr));
len = sizeof(cliaddr);
Getpeername(client_sockfd, (SA*) &cliaddr, &len);
printf("\nServer child connected to client, protocol Address:%s\n", Sock_ntop((SA*) &cliaddr, len));
temp_port = ntohs(cli_conn.sin_port);
send_buffer_t buf;
sprintf(buf.payload, "%d", temp_port);
buf.hdr.cntrl = 1;
long long seq = -1;
static void sig_alrm(int signo);
Signal(SIGALRM, sig_alrm);
Sendto(mysockfd, &buf, sizeof(buf), 0,(SA*) &cliaddr, len);
printf("New port sent.\n");
alarm(5);
if (sigsetjmp(jmpbuf, 1) != 0) {
printf ("Didn't receive ack for port number transfer. Resending.\n");
Sendto(mysockfd, &buf, sizeof(buf), 0,(SA*) &cliaddr, len);
Write(client_sockfd, &buf, sizeof(buf));
alarm (5);
}
send_buffer_t rb;
do {
memset(&rb, 0, sizeof(rb));
n = read(client_sockfd, &rb, sizeof(rb));
} while (rb.hdr.cntrl == 0);
printf("Msg (ACK) on new port\n");
close(mysockfd);
alarm(0);
memset(&buf, 0, sizeof(buf));
buf.hdr.sft = 1;
Write(client_sockfd, &buf, sizeof(buf));
if (send_file(filename, client_sockfd, maxslidewindowsize))
printf("Failed to send file\n");
table[table_count].is_conn = 0;
exit(0);// exit child
} else if (pid > 0) {
table[table_count].ip = cliaddr;
table[table_count].is_conn = 1;
table_count++;
} else {
err_sys("Creating child failed: ");
}
}
}
}
return 0;
}
