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/* $Id: clientlib.c 6155 2003-01-19 19:58:25Z rra $
**
** Routines compatible with the NNTP "clientlib" routines.
*/
#include "config.h"
#include "clibrary.h"
#include "inn/innconf.h"
#include "libinn.h"
#include "nntp.h"
FILE *ser_rd_fp = NULL;
FILE *ser_wr_fp = NULL;
char ser_line[NNTP_STRLEN + 2];
/*
** Get the name of the NNTP server. Ignore the filename; we use
** our own configuration stuff. Return pointer to static data.
*/
char *
getserverbyfile(char *file UNUSED)
{
static char buff[256];
strlcpy(buff, innconf->server, sizeof(buff));
return buff;
}
/*
** Get a connection to the remote news server. Return server's reply
** code or -1 on error.
*/
int
server_init(char *host, int port)
{
char line2[NNTP_STRLEN];
/* This interface may be used by clients that assume C News behavior and
won't read inn.conf themselves. */
if (innconf == NULL)
if (!innconf_read(NULL))
return -1;
if (NNTPconnect(host, port, &ser_rd_fp, &ser_wr_fp, ser_line) < 0) {
if (ser_line[0] == '\0')
/* I/O problem. */
return -1;
/* Server rejected connection; return it's reply code. */
return atoi(ser_line);
}
/* Send the INN command; if understood, use that reply. */
put_server("mode reader");
if (get_server(line2, (int)sizeof line2) < 0)
return -1;
if (atoi(line2) != NNTP_BAD_COMMAND_VAL)
strlcpy(ser_line, line2, sizeof(ser_line));
/* Connected; return server's reply code. */
return atoi(ser_line);
}
#define CANTPOST \
"NOTE: This machine does not have permission to post articles"
#define CANTUSE \
"This machine does not have permission to use the %s news server.\n"
/*
** Print a message based on the the server's initial response.
** Return -1 if server wants us to go away.
*/
int
handle_server_response(int response, char *host)
{
char *p;
switch (response) {
default:
printf("Unknown response code %d from %s.\n", response, host);
return -1;
case NNTP_GOODBYE_VAL:
if (atoi(ser_line) == response) {
p = &ser_line[strlen(ser_line) - 1];
if (*p == '\n' && *--p == '\r')
*p = '\0';
if (p > &ser_line[3]) {
printf("News server %s unavailable: %s\n", host,
&ser_line[4]);
return -1;
}
}
printf("News server %s unavailable, try later.\n", host);
return -1;
case NNTP_ACCESS_VAL:
printf(CANTUSE, host);
return -1;
case NNTP_NOPOSTOK_VAL:
printf("%s.\n", CANTPOST);
/* FALLTHROUGH */
case NNTP_POSTOK_VAL:
break;
}
return 0;
}
/*
** Send a line of text to the server.
*/
void
put_server(const char *buff)
{
fprintf(ser_wr_fp, "%s\r\n", buff);
fflush(ser_wr_fp);
}
/*
** Get a line of text from the server, strip trailing \r\n.
** Return -1 on error.
*/
int
get_server(char *buff, int buffsize)
{
char *p;
if (fgets(buff, buffsize, ser_rd_fp) == NULL)
return -1;
p = &buff[strlen(buff)];
if (p >= &buff[2] && p[-2] == '\r' && p[-1] == '\n')
p[-2] = '\0';
return 0;
}
/*
** Send QUIT and close the server.
*/
void
close_server(void)
{
char buff[NNTP_STRLEN];
if (ser_wr_fp != NULL && ser_rd_fp != NULL) {
put_server("QUIT");
fclose(ser_wr_fp);
ser_wr_fp = NULL;
get_server(buff, (int)sizeof buff);
fclose(ser_rd_fp);
ser_rd_fp = NULL;
}
}
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