/***
 * scli1.c
 *
 * Repeatly prompts user to enter a string, sends each string to the server,
 * prints reply from server, until string "quit" is encountered. 
 *
 * To compile: gcc -lsocket -lnsl scli1.c -o scli1
 *
 **/

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <string.h>

#define CADDRESS "clientsocket"
#define SADDRESS "mysocket"
#define BUFLEN  40

int main(int argc, char *argv[]) 
{
    struct sockaddr_un party_addr, own_addr;
    int  sockfd;
    char buf[BUFLEN];
    int  party_len;
    int  quitting;

    quitting = 1;

    /*   */

    memset(&own_addr, 0, sizeof(own_addr));
    own_addr.sun_family = AF_UNIX;
    strcpy(own_addr.sun_path, CADDRESS);

    /*  */
    if ((sockfd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) 
    {
        printf("can't create socket\n");
        return 0;
    }

    /*  */
    unlink(own_addr.sun_path);
    if (bind(sockfd, (struct sockaddr *) &own_addr, 
             sizeof(own_addr.sun_family)+ strlen(own_addr.sun_path)) < 0) 
    {
        printf("can't bind socket!");
        return 0;
    }

    /*  */
    memset(&party_addr, 0, sizeof(party_addr));
    party_addr.sun_family = AF_UNIX;
    strcpy(party_addr.sun_path, SADDRESS);
    printf("type the string: ");

    while (gets(buf)) 
    {
        /* ? */
        quitting = (!strcmp(buf, "quit"));

        /*  */
        if (sendto(sockfd, buf, strlen(buf) + 1, 0, (struct sockaddr *) 
                   &party_addr, sizeof(party_addr.sun_family) + 
                   strlen(SADDRESS)) != strlen(buf) + 1)
        {
            printf("client: error writing socket!\n");
            return 0;
        }

        /*   */
        if (recvfrom(sockfd, buf, BUFLEN, 0, NULL, 0) < 0)
        {
            printf("client: error reading socket!\n");
            return 0;
        }
                
        printf("client: server answered: %s\n", buf);
        if (quitting) break;
        printf("type the string: ");
    }
    
    close(sockfd);
    return 0;

}