Sockets in C(Linux) - Wie bekomme ich die client-IP & Port

OK also ich habe einen server & client über sockets und threading.

Server:

   <Includes>...


    struct sockaddr_in server;
    int sock,rvsock;
    int port,max,k = 0, len;
    char buff[1024];
    pthread_t thr[100];

  void handler(int sig)
  {
  if(close(rvsock) < 0)
  {
    perror("Close.");
    return;
  }
 }

void *worker (void* a)
{
    k=0;
    int ar[3];
    int i=0;
    char Smax[1024];
    char *token;
    recv(sock,&buff,sizeof(buff),0);
        token = strtok(buff," ");

        while(token && token!=" ")

        {
        int nr = atoi(token);
        ar[i]=nr;
        k=k+nr;
        i++;
        token = strtok(NULL," ");
    }
    if (k > max)
        {
            printf ("%d is indeed > than %d\n",k,max);
            max=k;
        }

printf("Current max is %d\n",max);
char temp[1024];
sprintf(temp,"%d",max);
strcpy(Smax,"The current maximum is: ");
strcat(Smax,temp);
strcat(Smax," and the numbers are: ");
for (i=0;i<3;i++)
{
    sprintf(temp,"%d",ar[i]);
    strcat(Smax,temp);
    strcat(Smax," ");
}
printf ("%s\n",Smax);
send(sock, &Smax, sizeof(Smax), 0);
close(sock);
}

int main (int argc,char* argv[])
{   
    int i=0;
    if (argc < 2)
    {
        perror ("No port assigned.");
        exit(0);
}
else
{
    sscanf (argv[1],"%d",&port);
}
/* Creating socket (AF_INET - TCP/IP) */
rvsock = socket (AF_INET,SOCK_STREAM,0);
if (rvsock<0)
{
    perror("Socket was not created.");
} 


memset(&server,0,sizeof(server));
server.sin_family=AF_INET;
server.sin_addr.s_addr=INADDR_ANY;
server.sin_port=htons(port);

/* Binding socket */

if( bind(rvsock,(struct sockaddr*)&server,sizeof(server))<0)
    perror("Error in binding socket");
else
    {
        printf("Server established.\nAwaying clients.\n");
    }
/* Listening */

if (listen(rvsock,5)<0)
    perror("Error in listening");
len = sizeof(server);

signal(SIGINT,handler);

/* Accepting and threading */

while(1 && i<100){
    sock = accept (rvsock,(struct sockaddr*)&server,(socklen_t * __restrict__) &len);
    if (sock<0)
    {
        perror("Error in accepting socket");
        break;
    }
    pthread_create(&thr,NULL,worker,i);
    i++;
}
int j;
/* Joining threads */
for (j=0;j<100;j++)
    pthread_join(thr,NULL);
return 0;

Clientseitiger:

int main(int argc,char* argv[])
{

int sock;

int k,port;

char len[1024];

char buff[1024];


struct sockaddr_in server;
if (argc<2)
{
    perror ("Invalid number of args");
    exit(0);
}
else
{
    sscanf(argv[1],"%d",&port);
    randomize(buff);
}

sock = socket(AF_INET,SOCK_STREAM,0);
if(sock<0)
    perror("Socket creation failure");

memset(&server,0,sizeof(server));
server.sin_family=AF_INET;
server.sin_addr.s_addr=inet_addr("127.0.0.1");
server.sin_port=htons(port);

if (connect(sock,(struct sockaddr*)&server,sizeof(server))<0)
    perror("Connection error");
printf("Sending input: %s\n",buff);
send(sock,buff,sizeof(buff),0);
while(1)
{
    k = recv(sock,&len, sizeof(len),0);
    if(k<=0)
        break;
    printf("Got back %s \n",len);
}
close(sock);
return 0;

Server hat ein Arbeitnehmer die Funktion sendet Daten zurück an den client. Ich muss in diesen Daten die IP und Port des Clients.

Wie kann ich die bekommen ?

Mann akzeptieren, was Sie brauchen, ist gespeichert in addr.
möglich, Duplikat der Wie kann ich die Anzeige-client die ip-Adresse des Berichts mit der c-Buchse-Programm?

InformationsquelleAutor Cata Visan | 2013-11-27

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