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|
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "error/error.h"
#include "pervasive.h"
static void print_help (const char runnable [const restrict static 1])
{
printf
(
"JabberHive - CLI Gateway\n"
"Software Version %d\n"
"Protocol Version %d\n"
"\nUsages:\n"
" JH GATEWAY:\t%s SOCKET_NAME\n"
" SHOW HELP:\tAnything else\n"
"\nParameters:\n"
" SOCKET_NAME: valid UNIX socket.\n",
JH_PROGRAM_VERSION,
JH_PROTOCOL_VERSION,
runnable
);
}
static int open_socket
(
FILE * s [const restrict static 1],
const char socket_name [const restrict static 1]
)
{
int fd;
struct sockaddr_un addr;
const int old_errno = errno;
errno = 0;
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
{
JH_FATAL
(
stderr,
"Unable to create socket: %s.",
strerror(errno)
);
errno = old_errno;
return -1;
}
errno = old_errno;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, socket_name, sizeof(addr.sun_path)-1);
errno = 0;
if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1)
{
JH_FATAL
(
stderr,
"Unable to connect to address: %s.",
strerror(errno)
);
errno = old_errno;
close(fd);
return -1;
}
errno = 0;
*s = fdopen(fd, "w+");
if (*s == (FILE *) NULL)
{
JH_FATAL
(
stderr,
"Unable to open socket as a file: %s.",
strerror(errno)
);
errno = old_errno;
close(fd);
return -1;
}
errno = old_errno;
return 0;
}
static void gateway
(
FILE socket [const restrict static 1]
)
{
int is_sending;
int data, data_prev, is_last_message;
is_sending = 1;
for (;;)
{
if (is_sending)
{
data = fgetc(stdin);
if (data == EOF)
{
return;
}
else
{
if (fputc(data, socket) == EOF)
{
JH_S_FATAL(stderr, "Unable to write to socket.");
return;
}
}
if (data == '\n')
{
is_sending = 0;
data = 0;
is_last_message = 0;
}
}
else
{
data_prev = data;
data = fgetc(socket);
if (data == EOF)
{
JH_S_FATAL(stderr, "Unable to read from socket.");
return;
}
else
{
if (fputc(data, stdout) == EOF)
{
/* ... seems like it wouldn't work. */
JH_S_FATAL(stderr, "Unable to write to stdout.");
return;
}
}
is_last_message =
(
is_last_message
|| (
(data_prev == '!')
&& (
(data == 'P')
|| (data == 'N')
)
// TODO: check for the ' '.
)
);
if (is_last_message && (data == '\n'))
{
is_sending = 1;
}
}
}
}
int main (int const argc, const char * argv [const static argc])
{
FILE * socket;
if (argc != 2)
{
print_help(argv[0]);
return -1;
}
if (open_socket(&socket, argv[1]) < 0)
{
return -1;
}
gateway(socket);
fclose(socket);
return 0;
}
|
