Linux socket test

client.cc

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>

#define BUFLEN 10

int main( int argc, char **argv )
{
    addrinfo hints;
    memset(&hints, 0, sizeof(hints));
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_family = AF_UNSPEC;
    addrinfo* res;
    int ret = getaddrinfo("::1", "2333", const_cast<const addrinfo*>(&hints), &res);
    if(ret != 0)
        return ret;
    int sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
    if(sockfd == -1)
        return errno;
    ret = connect(sockfd, const_cast<const sockaddr*>(res->ai_addr), res->ai_addrlen);
    if(ret != 0)
        return errno;
    freeaddrinfo(res);
    while(1) {
        void* buf = new char[BUFLEN];
        ssize_t rtt = read(0, buf, BUFLEN);
        if (rtt == -1 || rtt == 0) {
            int ern = errno;
            close(sockfd);
            return ern;
        }
        ssize_t rtc = write(sockfd, buf, rtt);
        if(rtc == -1) {
            int ernn = errno;
            close(sockfd);
            return ernn;
        }
    }
}

server.sh

nc -l ::1 2333