I am trying to modify a server code which is listening to different client ,now i want to print a line like "got connection from clinet address".but how do i achieve this .this is the server code.
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, pid;开发者_开发问答
socklen_t clilen;
struct sockaddr_in serv_addr, cli_addr;
if (argc < 2) {
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
error("ERROR on binding");
listen(sockfd,5);
clilen = sizeof(cli_addr);
while (1)
{
newsockfd = accept(sockfd,(struct sockaddr *) &cli_addr, &clilen);
if (newsockfd < 0)
error("ERROR on accept");
printf("got connection from %s",&cli_addr);
pid = fork();
if (pid < 0)
error("ERROR on fork");
if (pid == 0)
{
close(sockfd);
exit(0);
}
else
close(newsockfd);
} /* end of while */
close(sockfd);
return 0; /* we never get here */
}
Printf("got connection from %s",&cli_addr);
In this particular line i have to prinnt client address
Use inet_ntoa function to convert binary ip address to dot notation.
Use inet_ntop to show the client address as following:
printf("Client Adress = %s",inet_ntop(AF_INET,&cli_addr.sin_addr,
clientname,sizeof(clientname)));
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