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#include <stdio.h>
#include <stdlib.h> /* for exit */
#include <string.h> /* for bzero */
#include <unistd.h> /* for read and write */
#include <ctype.h> /* for isxdigit */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include "../dpip/dpip.h"
#define MSG_ERR(...) printf("** ERROR **: " __VA_ARGS__);
char *CMD_REGISTER = "<cmd='register_all' '>";
char *CMD_STOP = "<cmd='DpiBye' '>";
static char SharedKey[32];
void error(char *msg)
{
perror(msg);
exit(1);
}
/*
* Read dpid's communication keys from its saved file.
* Return value: 1 on success, -1 on error.
*/
static int Dpi_read_comm_keys(int *port)
{
FILE *In;
char *fname, *rcline = NULL, *tail;
int i, ret = -1;
fname = dStrconcat(dGethomedir(), "/.dillo/dpid_comm_keys", NULL);
if ((In = fopen(fname, "r")) == NULL) {
MSG_ERR("[Dpi_read_comm_keys] %s\n", dStrerror(errno));
} else if ((rcline = dGetline(In)) == NULL) {
MSG_ERR("[Dpi_read_comm_keys] empty file: %s\n", fname);
} else {
*port = strtol(rcline, &tail, 10);
for (i = 0; *tail && isxdigit(tail[i+1]); ++i)
SharedKey[i] = tail[i+1];
SharedKey[i] = 0;
ret = 1;
}
dFree(rcline);
dFree(fname);
return ret;
}
int main(int argc, char *argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
char buffer[256];
if (argc != 2) {
fprintf(stderr,"\nUsage:\n %s {stop|register|chat}\n\n", argv[0]);
exit(1);
}
/* Read dpid's port number from saved file */
if (Dpi_read_comm_keys(&portno) == -1) {
MSG_ERR("main: Can't read dpid's port number\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
serv_addr.sin_port = htons(portno);
if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
error("ERROR connecting");
snprintf(buffer, sizeof(buffer), "<cmd='auth' msg='%s' '>", SharedKey);
n = write(sockfd, buffer, strlen(buffer));
if (n < 0)
error("ERROR writing to socket");
if (strcmp(argv[1], "stop") == 0) {
strcpy(buffer, CMD_STOP);
} else if (strcmp(argv[1], "register") == 0) {
strcpy(buffer, CMD_REGISTER);
} else if (strcmp(argv[1], "chat") == 0) {
printf("Please enter the message: ");
bzero(buffer,256);
fgets(buffer,255,stdin);
} else {
MSG_ERR("main: Unknown operation '%s'\n"
"Usage:\n"
"%s {stop|register|chat}\n\n", argv[1], argv[0]);
exit(1);
}
n = write(sockfd,buffer,strlen(buffer));
if (n < 0)
error("ERROR writing to socket");
/*
bzero(buffer,256);
n = read(sockfd,buffer,255);
if (n < 0)
error("ERROR reading from socket");
printf("%s\n",buffer);
*/
close(sockfd);
return 0;
}
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