int main(int argc , char *argv[]) {
int socket_desc, client_sock, c;
struct sockaddr_in server, client;
socket_desc = socket(AF_INET, SOCK_STREAM , 0);
if (socket_desc == -1)
{
printf("Could not create socket");
exit(1);
}
puts("Socket created");
server.sin_family = AF_INET;
server.sin_addr.s_addr = htonl(INADDR_ANY);
server.sin_port=htons((ushort) 3000);
//Bind
if(bind(socket_desc,(struct sockaddr *)&server , sizeof(server)) < 0)
{
//print the error message
perror("bind failed. Error");
exit(1);
}
puts("bind done");
//Listen
listen(socket_desc , 5);
//Print address
printIPAddress();
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
pthread_t thread_id;
while( (client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c)) )
{
puts("Connection accepted");
if( pthread_create( &thread_id , NULL , connection_handler , (void*) &client_sock) < 0)
{
perror("could not create thread");
exit(1);
}
puts("Handler assigned");
}
if (client_sock < 0)
{
perror("accept failed");
exit(1);
}
}
/**
* Prints interface information for the interface ifa
*/
void printInterfaceInfo(struct ifaddrs *ifa){
// create a puppet socket to act as a file descriptor for ioctl()
// I can create it here, since I can reuse it
int fd=socket(AF_INET,SOCK_DGRAM,0);
// create the ifr & ifm
// ifr is more general and more stuff can be retrieved, while
// ifm is purely for media information
struct ifreq ifr;
struct ifmediareq ifm;
size_t if_name_len=strlen(ifa->ifa_name);
// ensure the interface name is not too long, since ifr_name is fixed length buffer
if (if_name_len < sizeof(ifr.ifr_name) && if_name_len < sizeof(ifm.ifm_name) ) {
// set name for IFR
memcpy(ifr.ifr_name, ifa->ifa_name, if_name_len);
ifr.ifr_name[if_name_len]=0;
// set name for IFM
memcpy(ifm.ifm_name, ifa->ifa_name, if_name_len);
ifm.ifm_name[if_name_len]=0;
} else {
puts("Interface name is too long");
exit(1);
}
//output current interface
printf("Interface: %s", ifa->ifa_name);
if (fd==-1) {
puts("Socket could not be created");
exit(1);
}
// print flags
printHeader("Flags", &printFlags, ifa->ifa_flags);
// prints the MTU
if (ioctl(fd, SIOCGIFMTU, &ifr) != -1)
printf("\tMTU: %d", ifr.ifr_metric);
// prints the options
if (ioctl(fd, SIOCGIFCAP, &ifr) != -1)
printHeader("Options", &printCapabilities, ifr.ifr_curcap);
// prints the MAC address
if(ifa->ifa_addr->sa_family == AF_LINK){
struct sockaddr_dl *mac_addr = (struct sockaddr_dl *)ifa->ifa_addr;
unsigned char mac[6];
// check if he address length is 6 bytes
if (6 == mac_addr->sdl_alen) {
memcpy(mac, LLADDR(mac_addr), mac_addr->sdl_alen);
printf("\tMAC Address: %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
}
// print status
if (ioctl(fd, SIOCGIFMEDIA, &ifm) != -1)
printf("\tStatus:%s\n", ifm.ifm_status == 3 ? "Active" : ifm.ifm_status == 1 ?
"Inactive" : "Unknown"); // 3 is active and 1 is inactive
/**
* I'm not going to handle media because it has way too many flags to implement
* in a timely manner
*/
// IP
printIPAddress("IP", IP_ADDR, fd, ifr);
// Point to point
printIPAddress("Point-to-Point", P2P_ADDR, fd, ifr);
// broadcast
printIPAddress("Broadcast", BCAST_ADDR, fd, ifr);
//netmask
printIPAddress("Netmask", MASK_ADDR, fd, ifr);
//autoconf
printIPAddress("Autoconf", AUTOCONF_ADDR, fd, ifr);
//autoconf mask
printIPAddress("Autoconf mask", AUTOCONF_MASK, fd, ifr);
//ipv4all
printIPAddress("IPv4All", IPV4ALL_ADDR, fd, ifr);
//link level
printIPAddress("Link level", LINK_LEVEL_ADDR, fd, ifr);
close(fd);
}
int main(int argc, char *argv[]){
int listenfd,
i=0,
iPort,
fd,
err,
status;
char client[MAX_CANON],
command[MAX_CANON],
ip[IP_MAX],
*saveptr,
*sPort,
*sIp,
a,
*c;
struct dirent *direntp;
DIR *dirp;
struct sigaction sigIntHandler;
struct ifaddrs *myaddrs, *ifa;
request_t request, request2;
flag_t flag;
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGINT);
sigIntHandler.sa_handler = signalHandler;
if(argc != 2)
usage("2 arguman girmelisiniz\t./client <server IP>:<server port number>");
else{
if (sigemptyset(&sigIntHandler.sa_mask) == -1 || sigaction(SIGINT, &sigIntHandler, NULL) || sigaction(SIGUSR1, &sigIntHandler, NULL))
err_sys("signal handler");
sigIntHandler.sa_flags = 0;
saveptr=command;
sIp=strtok_r(argv[1], ":", &saveptr);
sPort=strtok_r(NULL, ":", &saveptr);
printf("%s\n", argv[1]);
if(sPort!=NULL)
iPort=atoi(sPort);
else
usage("./client <server IP>:<server port number>");
socketFD = callSocket(sIp, iPort);
if(socketFD==-1)
err_sys("connection error");
getcwd(request2.path, PATH_MAX);
if(write(socketFD, &request2, sizeof(request2))<0)
err_sys("write");
if(read(socketFD, &id, sizeof(int))<0)
err_sys("read");
pthread_mutex_init(&mutex, NULL);
if (err = pthread_create(&tid, NULL, (void *)readFromServer, &c)<0)
perror("pthread_create");
status = getifaddrs(&myaddrs);
if (status != 0)
err_sys("getifaddrs failed!");
freeifaddrs(myaddrs);
system("clear");
printf("Port Number: %d ",iPort);
for (ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
if ((ifa->ifa_flags & IFF_UP) != 0 && NULL != ifa->ifa_addr)
printIPAddress(ifa);
fprintf(stderr, "\nPlease enter a command.\nEnter 'help' for display the available commands and their usage.\n");
while(1){
printf("\nClient ID: %d\n >\t", id);
fgets(command, 50, stdin);
printf("\n");
command[strlen(command)-1]='\0';
if(strcmp(command, "help") == 0)
menu();
else if(strcmp(command,"listLocal") == 0){
char cwd[255];
getcwd(cwd, 255);
if((dirp = opendir(cwd)) == NULL)
err_sys("opendir");
printf("List of local files in %s\n", cwd);
while((direntp = readdir(dirp)) != NULL) {
if(strcmp(direntp->d_name,".") != 0 && strcmp(direntp->d_name,"..") != 0){
fprintf(stderr, "%s\n", direntp->d_name);
}
}
}
else if(strcmp(command,"lsClients") == 0){
sprintf(request.command, "%s", "lsClients");
if(write(socketFD, &request, sizeof(request))<0)
perror("write");
}
else if(strncmp(command,"sendFile", 8) == 0){
bool status=true;
char *fileName, *id1, *saveptr;
saveptr=command;
strtok_r(command, " ", &saveptr);
fileName = strtok_r(NULL, " " , &saveptr);
id1 = strtok_r(NULL, " ", &saveptr);
if(fileName==NULL){
fprintf(stderr, "Please enter a current filename.\n");
status=false;
}
else{
sprintf(request.file.name, "%s", fileName);
if((fd = open(fileName, O_RDONLY))<0){
fprintf(stderr, "%s isn't a current file name. Try again!\n", fileName);
request.status=-3;
status=false;
}
}
if(id1==NULL) { /*dosyayi sadece server'a yolla. */
request.status=-1;
request.clientID=id;
printf("nULL\n");
if((fd = open(fileName, O_RDONLY))<0){
fprintf(stderr, "%s isn't a current file name. Try again!\n", fileName);
status=false;
printf("Status: %d\n", status);
}
}
else{
request.status=1;
request.clientID=atoi(id1);
}
struct stat st;
stat(fileName, &st);
request.file.size = st.st_size;
strcpy(request.command,"sendFile");
if(status){
flagWrite=1;
pthread_sigmask(SIG_BLOCK, &set, NULL);
if(write(socketFD, &request, sizeof(request))<0)
err_sys("write");
else{
int j=0;
while(j<request.file.size){
if(read(fd, &a, sizeof(char))<0)
perror("read1");
write(socketFD, &a, sizeof(char));
++j;
}
close(fd);
flagWrite=0;
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
}
}
}
else if(strcmp(command,"listServer") == 0){
sprintf(request.command, "%s", "listServer");
if(write(socketFD, &request, sizeof(request))<0)
perror("write");
}
else
fprintf(stderr, "Please enter a current command.\n");
}
}
}
