Jeg skrev så godt som jeg kunne det meste af beej om til c++ da jeg lavede min første client server... du kan få koden her:
#### CLIENT.CC ####
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <iostream>
#define PORT 10500 // the port client will be connecting to
#define MAXDATASIZE 100 // max number of bytes we can get at once
int main(int argc, char *argv[])
{
int sockfd;
struct hostent *he;
struct sockaddr_in their_addr; // connector's address information
if (argc != 2)
{
fprintf(stderr,"usage: client hostname\n");
exit(1);
}
if ((he=gethostbyname(argv[1])) == NULL)
{ // get the host info
perror("gethostbyname");
exit(1);
}
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
exit(1);
}
their_addr.sin_family = AF_INET; // host byte order
their_addr.sin_port = htons(PORT); // short, network byte order
their_addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(&(their_addr.sin_zero), '\0', 8); // zero the rest of the struct
if (connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) == -1)
{
perror("connect");
exit(1);
}
// SEND REQUEST
char *message = "request";
cout <<"Besked: " <<message <<endl <<"Længden: " <<strlen( message ) <<endl;
if( send( sockfd, message, strlen( message )+1, 0) == -1 )
cout <<"Fejl ved afsending af beskeden: " <<message <<endl;
// MODTAG EMAIL ADRESSE
int size = 1000,
recvLen = 0,
done = 0,
numBytes,
i;
char *buf = (char *)malloc( size );
while( !done && ( (numBytes = recv( sockfd, buf+recvLen, size-recvLen, 0)) >= 0) )
{
recvLen += numBytes;
for( i=(recvLen-numBytes); i<recvLen; i++ )
if( buf[ i ] == '\0' )
done = 1;
if( (size-recvLen)<100 )
{
size += 1000;
buf = (char*)realloc( buf, size );
}
}
cout <<"Følgende er blevet modtaget: " <<buf <<endl;
close(sockfd);
return 0;
}
#### SERVER.CC #####
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
#include <iostream.h>
using namespace std;
// Egen klasse
#include "include/g4.h"
#define MYPORT 10500
#define BACKLOG 10
int main(void)
{ string test = "test";
const char *test2 = stoc( test );
cout <<"T: " <<test2 <<endl;
int sockfd, new_fd; // listen on sock_fd, new connection on new_fd
struct sockaddr_in my_addr; // my address information
struct sockaddr_in their_addr; // connector's address information
socklen_t sin_size;
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYPORT); // short, network byte order
my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
memset(&(my_addr.sin_zero), '\0', 8); // zero the rest of the struct
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
{
perror("bind");
exit(1);
}
if (listen(sockfd, BACKLOG) == -1)
{
perror("listen");
exit(1);
}
signal (SIGCHLD, SIG_IGN);
while(1)
{ // main accept() loop
sin_size = sizeof(struct sockaddr_in);
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1)
{
perror("accept");
continue;
}
printf("server: got connection from %s\n", inet_ntoa(their_addr.sin_addr));
if (!fork())
{ // this is the child process
close(sockfd); // child doesn't need the listener
char *buf;
int size = 1000;
int recvLen = 0;
buf = (char*)malloc( size );
int numBytes;
int i;
int done = 0;
while( !done && ((numBytes= recv(new_fd, buf+recvLen, size-recvLen, 0)) >=0) )
{
recvLen += numBytes;
for( i = (recvLen - numBytes); i <recvLen; i++ )
if( buf[ i ] == '\0' )
done = 1;
if(( size - recvLen) < 100 )
{
size += 1000;
buf = (char *)realloc( buf, size );
}
}
cout <<"Følgende er blevet modtaget: " <<buf <<endl;
char* message1 = "ord{.|_ord}@ord{.|_ord}.ord";
if( send( new_fd, message1, strlen( message1 )+1, 0 )== -1 )
cout <<"Fejl ved afsending af email adressen: "
<<message1 <<endl;
// SEND EMAIL ADRESSE
string buffer = buf;
if( buffer == "request" )
{ char *message = "navn@domain.landekode";
//cout <<"Indtast e-mail adresse: ";
//char *message;
//gets( message );
cout <<"Send e-mail adressen: " <<message <<endl <<"Længden: " <<strlen( message ) <<endl;
if( send( new_fd, message, strlen( message )+1, 0 )== -1 )
cout <<"Fejl ved afsending af email adressen: " <<message <<endl;
}
close(new_fd);
exit(0);
}
close(new_fd); // parent doesn't need this
}
return 0;
}
########
revc er blevet opsådan at den bliver ved med at modtage en char af gangen indtil den møder en nulterminering. Så slipper man får at slukke sende to gange, en med længden af dem som kommer og så selve dataen... Det her revc æder den bare....
Koden kunne dog have været noget bedre.
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