static int startconn(void)
{
if(*progspec) {
if(nolisten == 0)
startlisten();
else
startnolisten();
}
if(curaddr != NULL)
return(sconnect());
return(econnect());
}
void main(int argc,char *argv[])
{
int port = 1235;
fd_set read_fds,master_fds;
int fdmax;
int ssocket;
struct sockaddr_in remoteaddr;
//zeroing fds
FD_ZERO(&read_fds);
FD_ZERO(&master_fds);
//getting socket
ssocket = gettcpsock();
fdmax = ssocket;
//declaring server address
struct sockaddr_in serveraddr;
memset(&serveraddr,0,sizeof(serveraddr));
serveraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(port);
//binding the peer to address
bindsock(ssocket,serveraddr);
//adding listener
FD_SET(ssocket,&master_fds);
//setting rtt and window size
int window,rtt;
printf("enter window size: ");
scanf("%d",&window);
printf("enter rtt: ");
scanf("%d",&rtt);
char str[30];
printf("enter the file to be sent: ");
scanf("%s",str);
//open the file
FILE *p;
p = fopen(str,"r+");
//packets and ackbuffer
struct pack *datato;
datato = malloc(100*sizeof(struct pack));
struct pack *datafrom;
datafrom = malloc(100*sizeof(struct pack));
//make packets invalid
makeinvalid(datato);
makeinvalid(datafrom);
//makepackets
makepackets(datato,p);
//print(datato);
int sendbase = -1;
int nextseq = 0;
//litsening to port
startlisten(ssocket,10);
int res;
int i;
int sendsocket=-1;
struct timeval tout;
tout.tv_sec = 1;
tout.tv_usec = 0;
int z = 0;
while(1)
{
read_fds = master_fds;
//printf("was here\n");
for(z=0;z<window*3;z++)
{
if (select(fdmax+1, &read_fds, NULL, NULL, &tout) == -1)
errorrep("select");
//printf("after select\n");
for(i=0; i <= fdmax; i++)
{
//printf("checking socket %d\n",i);
if(FD_ISSET(i,&read_fds))
{
//printf("%d socket is set\n",i);
if(i == ssocket)
{
//printf("incomming connection\n");
struct sockaddr_in remote;
int addrlen = sizeof(remote);
int newfd = accept(ssocket,(struct sockaddr *)&remote,&addrlen);
sendsocket = newfd;
if(newfd < 0)
errorrep("accept");
else
{
FD_SET(newfd,&master_fds);
if(newfd > fdmax)
fdmax = newfd;
printf("selectserver: new connection on socket %d\n",newfd);
}
}
else
{
//printf("incomming packet\n");
struct pack incomming;
res = recv(i,&incomming,sizeof(incomming),0);
if(res == 0)
{
printf("connection closed by socket: %d\n",i);
FD_CLR(i,&master_fds);
}
if(res < 0)
errorrep("reciving packet failed:");
if(incomming.sno == -1)
ackprocess(&incomming,datato,&sendbase);
if(incomming.ackno == -1)
{
dataprocess(&incomming,datafrom);
struct pack ackpacket;
ackpacket.sno = -1;
ackpacket.ackno = incomming.sno;
printf("sending acknoledgement: %d",ackpacket.ackno);
send(sendsocket,&ackpacket,sizeof(ackpacket),0);
}
}
}
}
}
if(sendsocket != -1)
{
sendpacket(datato,&window,&sendbase,&nextseq,sendsocket);
int ti = time(NULL);
while((time(NULL)) < ti+rtt)
{
int a=0;
a++; //does nothing
}
//print(datafrom);
}
}
}
void main(int argc,char *argv[])
{
if(argc != 2)
errorrep("invalid number of arguments\n");
//getting port number
int port = atoi(argv[1]);
fd_set master;
fd_set read_fds;
fd_set write_fds;
int fdmax;
int lispeer;
int newpeer;
struct sockaddr_in remoteaddr;
//zeroing fds
FD_ZERO(&master);
FD_ZERO(&read_fds);
//getting socket
lispeer = gettcpsock();
//declaring server address
struct sockaddr_in serveraddr;
memset(&serveraddr,0,sizeof(serveraddr));
serveraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(3300);
//declaring server address
struct sockaddr_in peeraddr;
memset(&peeraddr,0,sizeof(peeraddr));
peeraddr.sin_addr.s_addr = INADDR_ANY;
peeraddr.sin_family = AF_INET;
peeraddr.sin_port = htons(port);
//binding the peer to address
bindsock(lispeer,peeraddr);
//adding listener
FD_SET(lispeer,&master);
FD_SET(lispeer,&read_fds);
//litsening to port
startlisten(lispeer,10);
//register with the dir server
char filename[10];
printf("enter names of files with the peer with spaces:");
scanf("%[^\n]s",&filename[0]);
fdmax = lispeer;
int dserv = gettcpsock();
if(fdmax < dserv)
fdmax = dserv;
int res = connect(dserv,(struct sockaddr *)&serveraddr,sizeof(serveraddr));
if(res < 0 )
errorrep("connect");
struct packlist list[50];
/* *(buf+0) = '1';
*(buf+1) = ' ';
*(buf+2) = '\0';
strcat(buf,argv[1]);
strcat(buf,&username[1]);*/
struct pack reg;
reg.type = 1;
reg.prt = port;
strcpy(reg.filenames,&filename[0]);
int pcklen = sizeof(struct pack);
send(dserv,®,pcklen,0);
struct sockaddr_in filepeer,remote;
FILE *put;
while(1)
{
char name[10];
printf("enter file to be downloaded:");
scanf("%s",&name[0]);
struct pack req;
req.type=2;
req.prt = 0;
strcpy(req.filenames,name);
res = send(dserv,&req,sizeof(struct pack),0);
if(res < 0)
perror("req message failed to be sent");
int fileport;
res = recv(dserv,&fileport,sizeof(fileport),0);
if(res < 0)
perror("server failed to send the list");
printf("received %d as the fileport\n",fileport);
printf("do you want to get the file 1-yes 0-no\n");
int answer;
scanf("%d",&answer);
if(answer)
{
int getfile = gettcpsock();
memset(&filepeer,0,sizeof(filepeer));
filepeer.sin_addr.s_addr = inet_addr("127.0.0.1");
filepeer.sin_family = AF_INET;
filepeer.sin_port = htons(fileport);
res = connect(getfile,(struct sockaddr *)&filepeer,sizeof(filepeer));
if(res < 0)
errorrep("connection to getfile failed");
if(fdmax < getfile)
fdmax = getfile;
FD_SET(getfile,&read_fds);
res = send(getfile,&req,sizeof(struct pack),0);
if(res < 0)
errorrep("send file req");
if (select(fdmax+1, &read_fds, &write_fds, NULL, NULL) == -1)
{
perror("select");
exit(4);
}
FILE *get;
get = fopen(&name[0],"w+");
int i;
for(;;)
{
for(i=0; i<=fdmax; i++)
{
if(FD_ISSET(i,&read_fds))
{
if(i == lispeer)
{
int addrlen = sizeof remote;
int newfd = accept(lispeer,(struct sockaddr *)&remote,&addrlen);
if(newfd < 0)
errorrep("accept");
else
{
FD_SET(newfd,&write_fds);
if(newfd > fdmax)
fdmax = newfd;
printf("selectserver: new connection on socket %d\n",newfd);
struct pack filereq;
int res = recv(newfd,&filereq,sizeof(filereq),0);
if(res < 0)
errorrep("here\n");
put = fopen(filereq.filenames,"r+");
}
}
else
{
char buf[256];
res = recv(i,buf,sizeof(buf),0);
if(res == 0)
printf("connection closed by socket %d\n",i);
if(res < 0)
{
errorrep("recv");
FD_CLR(i,&master);
close(i);
}
printf("getting: %s\n",buf);
fprintf(get,"%s",buf);
//free(buf);
}
if(FD_ISSET(i,&write_fds))
{
char buf[256];
int nu = fscanf(put,"%[^\n]s",&buf[0]);
if(nu < 0)
shutdown(i,2);
else
printf("sending: %s\n",buf);
res = send(i,buf,sizeof(buf),0);
//free(buf);
}
}
}
}
}
}
}
void main(int argc,char *argv[])
{
/*if(argc != 2)
errorrep("invalid number of arguments\n");
//getting port number
int port = atoi(argv[1]);*/
fd_set master;
fd_set read_fds;
fd_set write_fds;
int fdmax;
int lispeer,p2,p3,p4;
int newpeer;
struct sockaddr_in remoteaddr;
//zeroing fds
FD_ZERO(&master);
FD_ZERO(&read_fds);
FD_ZERO(&write_fds);
//getting socket
lispeer = gettcpsock();
p2 = gettcpsock();
p3 = gettcpsock();
p4 = gettcpsock();
//declaring peer2 address
struct sockaddr_in serveraddr;
memset(&serveraddr,0,sizeof(serveraddr));
serveraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(3301);
//declaring peer3 address
struct sockaddr_in paddr;
memset(&paddr,0,sizeof(serveraddr));
paddr.sin_addr.s_addr = inet_addr("127.0.0.1");
paddr.sin_family = AF_INET;
paddr.sin_port = htons(3302);
//decalring peer4 address
struct sockaddr_in peaddr;
memset(&peaddr,0,sizeof(serveraddr));
peaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
peaddr.sin_family = AF_INET;
peaddr.sin_port = htons(3303);
//declaring server address
struct sockaddr_in peeraddr;
memset(&peeraddr,0,sizeof(peeraddr));
peeraddr.sin_addr.s_addr = INADDR_ANY;
peeraddr.sin_family = AF_INET;
peeraddr.sin_port = htons(3300);
//binding the peer to address
bindsock(lispeer,peeraddr);
//adding listener
FD_SET(lispeer,&master);
FD_SET(lispeer,&read_fds);
FD_SET(p2,&write_fds);
FD_SET(p3,&write_fds);
FD_SET(p4,&write_fds);
//litsening to port
startlisten(lispeer,10);
fdmax = lispeer;
if(fdmax < p2)
fdmax = p2;
if(fdmax < p3)
fdmax = p3;
if(fdmax < p4)
fdmax = p4;
/* //register with the dir server
char filename[10];
printf("enter names of files with the peer with spaces:");
scanf("%[^\n]s",&filename[0]);
fdmax = lispeer;
int dserv = gettcpsock();
if(fdmax < dserv)
fdmax = dserv;
int res = connect(dserv,(struct sockaddr *)&serveraddr,sizeof(serveraddr));
if(res < 0 )
errorrep("connect");
struct packlist list[50];
/* *(buf+0) = '1';
*(buf+1) = ' ';
*(buf+2) = '\0';
strcat(buf,argv[1]);
strcat(buf,&username[1]);*/
/* struct pack reg;
reg.type = 1;
reg.prt = port;
strcpy(reg.filenames,&filename[0]);
int pcklen = sizeof(struct pack);
send(dserv,®,pcklen,0);
struct sockaddr_in filepeer,remote;
FILE *put;*/
// connect(p2,(struct sockaddr *)&serveraddr,sizeof(serveraddr));
// connect(p3,(struct sockaddr *)&paddr,sizeof(paddr));
// connect(p4,(struct sockaddr *)&peaddr,sizeof(peaddr));
int i;
FILE *fp;
fp = fopen("peer1","r+");
char *buffer;
int connections = 0;
int newfd;
for(;;)
{
FILE *p;
p = fopen("rcv1","r+");
if (select(fdmax+1, &read_fds,NULL, NULL,NULL) == -1)
{
perror("select");
exit(4);
}
for(i=0;i<=fdmax;i++)
{
if(FD_ISSET(i,&read_fds))
{
if(i == lispeer)
{
int addrlen = sizeof remoteaddr;
newfd = accept(lispeer,(struct sockaddr *)&remoteaddr,&addrlen);
if(newfd < 0)
errorrep("accept");
else
{
printf("some one knocking connections\n");
FD_SET(newfd,&read_fds);
if(newfd > fdmax)
fdmax = newfd;
printf("selectserver: new connection on socket %d\n",newfd);
if(connections == 0)
connect(p2,(struct sockaddr *)&serveraddr,sizeof(serveraddr));
else
if(connections == 1)
connect(p3,(struct sockaddr *)&paddr,sizeof(paddr));
else
if(connections == 2)
connect(p4,(struct sockaddr *)&peaddr,sizeof(peaddr));
connections++;
printf("connection number %d\n",connections);
}
}
else
{
printf("in else\n");
int nbytes;
buffer = malloc(4*sizeof(char));
if((nbytes = recv(i,buffer,4*sizeof(char),0)) <= 0)
{
if(nbytes == 0)
printf("connection closed by socket %d\n",i);
else
errorrep("recv");
FD_CLR(i,&read_fds);
close(i);
}
else
{
printf("recived %d bytes\n",nbytes);
//fread(buffer,sizeof(char),4,p);
fseek(p,0,SEEK_END);
int j;
for(j=0;j<4;j++)
fprintf(p,"%c",*(buffer+j));
free(buffer);
}
int k;
if(connections == 3)
{
buffer = malloc(4*sizeof(char));
fread(buffer,sizeof(char),4,fp);
/*for(k=0;k<=fdmax;k++)
{
if(FD_ISSET(k,&write_fds))
{
int sbytes = send(k,buffer,4*sizeof(char),0);
printf("sent %d to %d",sbytes,k);
}
}*/
send(p2,buffer,4,0);
send(p3,buffer,4,0);
send(p4,buffer,4,0);
}
}
}
}
fclose(p);
}
/*while(1)
{
char name[10];
printf("enter file to be downloaded:");
scanf("%s",&name[0]);
struct pack req;
req.type=2;
req.prt = 0;
strcpy(req.filenames,name);
res = send(dserv,&req,sizeof(struct pack),0);
if(res < 0)
perror("req message failed to be sent");
int fileport;
res = recv(dserv,&fileport,sizeof(fileport),0);
if(res < 0)
perror("server failed to send the list");
printf("received %d as the fileport\n",fileport);
printf("do you want to get the file 1-yes 0-no\n");
int answer;
scanf("%d",&answer);
if(answer)
{
int getfile = gettcpsock();
memset(&filepeer,0,sizeof(filepeer));
filepeer.sin_addr.s_addr = inet_addr("127.0.0.1");
filepeer.sin_family = AF_INET;
filepeer.sin_port = htons(fileport);
res = connect(getfile,(struct sockaddr *)&filepeer,sizeof(filepeer));
if(res < 0)
errorrep("connection to getfile failed");
if(fdmax < getfile)
fdmax = getfile;
FD_SET(getfile,&read_fds);
res = send(getfile,&req,sizeof(struct pack),0);
if(res < 0)
errorrep("send file req");
if (select(fdmax+1, &read_fds, &write_fds, NULL, NULL) == -1)
{
perror("select");
exit(4);
}
FILE *get;
get = fopen(&name[0],"w+");
int i;
for(;;)
{
for(i=0; i<=fdmax; i++)
{
if(FD_ISSET(i,&read_fds))
{
if(i == lispeer)
{
int addrlen = sizeof remote;
int newfd = accept(lispeer,(struct sockaddr *)&remote,&addrlen);
if(newfd < 0)
errorrep("accept");
else
{
FD_SET(newfd,&write_fds);
if(newfd > fdmax)
fdmax = newfd;
printf("selectserver: new connection on socket %d\n",newfd);
struct pack filereq;
int res = recv(newfd,&filereq,sizeof(filereq),0);
if(res < 0)
errorrep("here\n");
put = fopen(filereq.filenames,"r+");
}
}
else
{
char buf[256];
res = recv(i,buf,sizeof(buf),0);
if(res == 0)
printf("connection closed by socket %d\n",i);
if(res < 0)
{
errorrep("recv");
FD_CLR(i,&master);
close(i);
}
printf("getting: %s\n",buf);
fprintf(get,"%s",buf);
//free(buf);
}
if(FD_ISSET(i,&write_fds))
{
char buf[256];
int nu = fscanf(put,"%[^\n]s",&buf[0]);
if(nu < 0)
shutdown(i,2);
else
printf("sending: %s\n",buf);
res = send(i,buf,sizeof(buf),0);
//free(buf);
}
}
}
}
}
}*/
}
void main()
{
fd_set master;
fd_set read_fds;
int fdmax;
int listener;
int newfd;
char *buf;
buf = malloc(256*sizeof(char));
struct sockaddr_in remoteaddr;
//zeroing fds
FD_ZERO(&master);
FD_ZERO(&read_fds);
//getting socket
listener = gettcpsock();
//declaring server address
struct sockaddr_in serveraddr;
memset(&serveraddr,0,sizeof(serveraddr));
serveraddr.sin_addr.s_addr = INADDR_ANY;
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(3300);
//binding the server to address
bindsock(listener,serveraddr);
//adding listener to serv
FD_SET(listener,&master);
//litsening to the port
startlisten(listener,10);
fdmax = listener;
int addrlen;
FILE *p;
p = fopen("peer","r+");
if(p == NULL)
errorrep("fopen");
for(;;)
{
read_fds = master;
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1)
{
perror("select");
exit(4);
}
int i;
for(i=0; i<=fdmax; i++)
{
if(FD_ISSET(i,&read_fds))
{
if(i == listener)
{
addrlen = sizeof remoteaddr;
newfd = accept(listener,(struct sockaddr *)&remoteaddr,&addrlen);
if(newfd < 0)
errorrep("accept");
else
{
FD_SET(newfd,&master);
if(newfd > fdmax)
fdmax = newfd;
printf("selectserver: new connection on socket %d\n",newfd);
}
}
else
{
int nbytes;
if((nbytes = recv(i,buf,sizeof buf,0)) <= 0)
{
if(nbytes == 0)
printf("connection closed by socket %d\n",i);
else
errorrep("recv");
FD_CLR(i,&master);
close(i);
}
else
{
if(buf[0] == '1')
fprintf(p,"%s",buf+2);
if(buf[0] == '2')
{
printf("request for filename %s",(buf+2));
}
}
}
}
}
}
}
