/*receive two messages via s new socket,
print out the messages received and close the socket
bind to any of the addresses of this computer
using port given as argument */
void receiver(int port)
{
char message1[SIZE], message2[SIZE];
struct sockaddr_in mySocketAddress, aSocketAddress;
int s,aLength, n;
int i;
if((s = socket(AF_INET, SOCK_DGRAM, 0))<0) {
perror("socket failed");
return;
}
makeReceiverSA(&mySocketAddress, port);
if( bind(s, (struct sockaddr *)&mySocketAddress, sizeof(struct sockaddr_in))!= 0){
perror("Bind failed\n");
close(s);
return;
}
printSA(mySocketAddress);
aLength = sizeof(aSocketAddress);
aSocketAddress.sin_family = AF_INET;
if((n = recvfrom(s, message1, SIZE, 0, (struct sockaddr *)&aSocketAddress, &aLength))<0)
perror("Receive 1") ;
else{
printSA(aSocketAddress);
for(i=0; i<n; i++) printf("M:%d", message1[i]);
printf("\n Received Message:(%s)length = %d \n",
message1,n);
}
close(s);
}
void P() {
int i;
ENTRY e, e1, e2;
initEntry(sa1, 0, 1, -5);
initEntry(sa1, 0, 3, 8);
initEntry(sa1, 2, 0, 20);
initEntry(sa1, 3, 3, -3);
printf("Sparse array 1:\n");
printSA(sa1);
initEntry(sa2, 0, 2, -2);
initEntry(sa2, 0, 3, 5);
initEntry(sa2, 2, 0, -15);
printf("Sparse array 2:\n");
printSA(sa2);
addSA(sa1, sa2, sa3);
printf("Sparse array 3:\n");
printSA(sa3);
}
void sender(char *message1, char *message2,char *machine, int port)
{
int s, n;
char message[SIZE];
struct sockaddr_in mySocketAddress, yourSocketAddress;
if(( s = socket(AF_INET, SOCK_DGRAM, 0))<0) {
perror("socket failed");
return;
}
/*
if((x = setsockopt(s, SOL_SOCKET, SO_BROADCAST, &arg, sizeof(arg))<0)
perror("setsockopt SO_BROADCAST---");
exit(-1);
*/
makeLocalSA(&mySocketAddress);
if( bind(s, (struct sockaddr *)&mySocketAddress, sizeof(struct sockaddr_in))!= 0){
perror("Bind failed\n");
close (s);
return;
}
printSA(mySocketAddress);
makeDestSA(&yourSocketAddress,machine, port);
printSA(yourSocketAddress);
strcpy(message,message1);
if( (n = sendto(s, message, strlen(message), 0, (struct sockaddr *)&yourSocketAddress,
sizeof(struct sockaddr_in))) < 0)
perror("Send failed\n");
if(n != strlen(message)) printf("sent %d\n",n);
strcpy(message,message2);
if( (n = sendto(s, message, strlen(message), 0, (struct sockaddr *)&yourSocketAddress,
sizeof(struct sockaddr_in))) < 0)
perror("Send failed\n");
if(n != strlen(message)) printf("sent %d\n",n);
close(s);
}
