Search  

---

C:/temp/src/j2k/Deprecated/UDP.Unix/sender.cpp File Reference

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netdb.h>

Go to the source code of this file.

Defines
#define	MESSAGE   100
Functions
void	error_Mess (char *error_message)
int	main (int argc, char *argv[])

---

Define Documentation

#define MESSAGE   100

Definition at line 11 of file sender.cpp.

---

Function Documentation

void error_Mess (  char *    error_message )

Definition at line 13 of file sender.cpp. {}

int main (  int    argc = 0, char *    argv[] = NULL )

Definition at line 15 of file sender.cpp. { int MySocket; struct sockaddr_in receiver_addr; struct sockaddr_in from_addr; unsigned int receiver_port = 0; char *host = NULL; char *message = NULL; char buffer[MESSAGE+1]; char buffer2[MESSAGE+1]; int MessLen = 0; int Response_Length = 0; unsigned int receive_fromSize; struct hostent* hostdata = NULL; host = argv[1]; message = argv[2]; if( (MessLen = strlen(message)) > MESSAGE) cout<<"the message is too long \n"; MySocket = socket(AF_INET, SOCK_DGRAM, 0); if(MySocket < 0) { cout<<"socket error\n"; } cout<<"socket is a success\n"; if ( atoi( host ) > 0 ) { unsigned long IP = inet_addr( host ); hostdata = gethostbyaddr( (char*)&IP, sizeof( IP ), PF_INET ); } else { hostdata = gethostbyname( host ); } memset(&receiver_addr, 0, sizeof(receiver_addr)); receiver_addr.sin_family = AF_INET; receiver_addr.sin_addr = *(in_addr*)(hostdata->h_addr_list[0]); receiver_addr.sin_port = htons(4000); cout << receiver_addr.sin_addr.s_addr << endl; if((sendto(MySocket , message , MessLen, 0 , (struct sockaddr *) &receiver_addr , sizeof(receiver_addr))) != MessLen) cout<<"sendto sent a different number of bytes than expected "<<endl; else cout << "Message has been sent\n"; memset( buffer, 0, sizeof(buffer) );//clear buffer receive_fromSize = sizeof(from_addr); if((Response_Length = recvfrom(MySocket , buffer , MESSAGE , 0, (struct sockaddr *)&from_addr , &receive_fromSize)) != MessLen) { cout<<"receivedfrom failed\n"; } cout << '[' << MessLen << ']' << endl; cout << Response_Length << sizeof( buffer ) << strlen(buffer) << endl; cout << '(' << receive_fromSize << ')' << endl; memcpy( buffer2, buffer, 14 ); int i = 0; for(; i < 14; i++ ) printf("[%d]", buffer[i] ); cout<<"I received the buffer from the receiver: "; cout<< buffer <<endl; cout << from_addr.sin_addr.s_addr << endl; // if(receiver_addr.sin_addr.s_addr != from_addr.sin_addr.s_addr) { cout<<"Error, received message from else where!\n"; } // buffer[Response_Length] = '\0'; close(MySocket); return 0; }

---