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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <dbg.h>
#include <nsocket.h>
#define BACKLOG 10
int echo(int sock, char *buf, int len)
{
int bytes = 0;
bytes = send(sock, buf, len, 0);
check(bytes >= 0, "statserv: send failed");
return bytes;
error:
return -1;
}
void serve(int sock)
{
int rc = 0;
int buf_len = 1000;
char buf[buf_len];
ssize_t bytes;
do {
bytes = recv(sock, buf, buf_len, 0);
check(bytes >= 0, "statserv: recv failed");
if (bytes < 1) {
break;
}
rc = echo(sock, buf, bytes);
check(rc != -1, "statserv: echo failed");
} while(1);
rc = close(sock);
check(rc == 0, "statserv: close failed");
exit(0);
error:
rc = close(sock);
check(rc == 0, "statserv: close failed");
exit(1);
}
int main(void)
{
int rc = 0;
int sockfd_s = 0, sockfd_c = 0;
struct sockaddr sockaddr_c;
socklen_t sockaddr_c_len;
pid_t pidc;
sockfd_s = get_socket();
check(sockfd_s > 0, "stateserv: unable to get socket");
rc = listen(sockfd_s, BACKLOG);
check(rc == 0, "statserve: listen failed");
do {
printf("Waiting for connection...\n");
sockfd_c = accept(sockfd_s, &sockaddr_c, &sockaddr_c_len);
pidc = fork();
check(pidc != -1, "statserve: fork failed");
if (pidc == 0) {
serve(sockfd_c);
}
rc = close(sockfd_c);
check(rc == 0, "statserv: close failed");
} while(1);
rc = close(sockfd_s);
check(rc == 0, "statserv: close failed");
return 0;
error:
if (sockfd_s) {
rc = close(sockfd_s);
}
if (sockfd_c) {
rc = close(sockfd_c);
}
return -1;
}
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