nntp.h
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2004, 2007, 2011-2012, 2014-2016 Free Software
Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _MAILUTILS_SYS_NNTP_H
#define _MAILUTILS_SYS_NNTP_H
#include <sys/types.h>
#include <mailutils/nntp.h>
#include <mailutils/errno.h>
#ifdef DMALLOC
# include <dmalloc.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Response codes. */
#define MU_NNTP_RESP_CODE_HELP_FOLLOW 100
#define MU_NNTP_RESP_CODE_SERVER_DATE 111
#define MU_NNTP_RESP_CODE_POSTING_ALLOWED 200
#define MU_NNTP_RESP_CODE_POSTING_PROHIBITED 201
#define MU_NNTP_RESP_CODE_EXTENSIONS_FOLLOW 202
#define MU_NNTP_RESP_CODE_CLOSING 205
#define MU_NNTP_RESP_CODE_GROUP_SELECTED 211
#define MU_NNTP_RESP_CODE_LIST_FOLLOW 215
#define MU_NNTP_RESP_CODE_ARTICLE_FOLLOW 220
#define MU_NNTP_RESP_CODE_HEAD_FOLLOW 221
#define MU_NNTP_RESP_CODE_BODY_FOLLOW 222
#define MU_NNTP_RESP_CODE_ARTICLE_FOUND 223
#define MU_NNTP_RESP_CODE_NEWNEWS_FOLLOW 230
#define MU_NNTP_RESP_CODE_NEWGROUPS_FOLLOW 231
#define MU_NNTP_RESP_CODE_TRANSFER_OK 235
#define MU_NNTP_RESP_CODE_ARTICLE_RECEIVED 240
#define MU_NNTP_RESP_CODE_TRANSFER_ARTICLE 335
#define MU_NNTP_RESP_CODE_SEND_ARTICLE 340
#define MU_NNTP_RESP_CODE_TEMP_UNAVAILABLE 400
#define MU_NNTP_RESP_CODE_NO_EXTENSION 402
#define MU_NNTP_RESP_CODE_NO_ARTICLE_WITH_MID 430
#define MU_NNTP_RESP_CODE_NO_GROUP_SELECTED 412
#define MU_NNTP_RESP_CODE_NUMBER_INVALID 420
#define MU_NNTP_RESP_CODE_NO_ARTICLE 422
#define MU_NNTP_RESP_CODE_NO_ARTICLE_IN_RANGE 423
#define MU_NNTP_RESP_CODE_ARTICLE_NOT_WANTED 435
#define MU_NNTP_RESP_CODE_TRANSFER_NOT_POSSIBLE 436
#define MU_NNTP_RESP_CODE_TRANSFER_REJECTED 437
#define MU_NNTP_RESP_CODE_POSTING_NOT_PERMITTED 440
#define MU_NNTP_RESP_CODE_POSTING_FAILED 441
#define MU_NNTP_RESP_CODE_PERM_UNAVAILABLE 502
enum mu_nntp_state
{
MU_NNTP_NO_STATE,
MU_NNTP_CONNECT, MU_NNTP_GREETINGS,
MU_NNTP_MODE_READER, MU_NNTP_MODE_READER_ACK,
MU_NNTP_LIST_EXTENSIONS, MU_NNTP_LIST_EXTENSIONS_ACK, MU_NNTP_LIST_EXTENSIONS_RX,
MU_NNTP_LIST_ACTIVE, MU_NNTP_LIST_ACTIVE_ACK, MU_NNTP_LIST_ACTIVE_RX,
MU_NNTP_LIST_ACTIVE_TIMES, MU_NNTP_LIST_ACTIVE_TIMES_ACK, MU_NNTP_LIST_ACTIVE_TIMES_RX,
MU_NNTP_LIST_DISTRIBUTIONS, MU_NNTP_LIST_DISTRIBUTIONS_ACK, MU_NNTP_LIST_DISTRIBUTIONS_RX,
MU_NNTP_LIST_DISTRIB_PATS, MU_NNTP_LIST_DISTRIB_PATS_ACK, MU_NNTP_LIST_DISTRIB_PATS_RX,
MU_NNTP_LIST_NEWSGROUPS, MU_NNTP_LIST_NEWSGROUPS_ACK, MU_NNTP_LIST_NEWSGROUPS_RX,
MU_NNTP_QUIT, MU_NNTP_QUIT_ACK,
MU_NNTP_GROUP, MU_NNTP_GROUP_ACK,
MU_NNTP_LAST, MU_NNTP_LAST_ACK,
MU_NNTP_NEXT, MU_NNTP_NEXT_ACK,
MU_NNTP_ARTICLE, MU_NNTP_ARTICLE_ACK, MU_NNTP_ARTICLE_RX,
MU_NNTP_HEAD, MU_NNTP_HEAD_ACK, MU_NNTP_HEAD_RX,
MU_NNTP_BODY, MU_NNTP_BODY_ACK, MU_NNTP_BODY_RX,
MU_NNTP_STAT, MU_NNTP_STAT_ACK,
MU_NNTP_DATE, MU_NNTP_DATE_ACK,
MU_NNTP_HELP, MU_NNTP_HELP_ACK, MU_NNTP_HELP_RX,
MU_NNTP_NEWGROUPS, MU_NNTP_NEWGROUPS_ACK, MU_NNTP_NEWGROUPS_RX,
MU_NNTP_NEWNEWS, MU_NNTP_NEWNEWS_ACK, MU_NNTP_NEWNEWS_RX,
MU_NNTP_POST, MU_NNTP_POST_ACK, MU_NNTP_POST_0, MU_NNTP_POST_1, MU_NNTP_POST_2, MU_NNTP_POST_3,
MU_NNTP_IHAVE, MU_NNTP_IHAVE_ACK, MU_NNTP_IHAVE_0, MU_NNTP_IHAVE_1, MU_NNTP_IHAVE_2, MU_NNTP_IHAVE_3,
MU_NNTP_DONE, MU_NNTP_UNKNOWN, MU_NNTP_ERROR
};
/* Structure holding the data necessary to do proper buffering. */
struct mu_nntp_work_buf
{
char *buf;
char *ptr;
char *nl;
size_t len;
};
/* Structure holding the data for post. */
struct mu_nntp_post_buf
{
char *buf;
int sent_crlf;
size_t nread;
long offset;
size_t len;
};
/* Structure to hold things general to nntp connection, like its state, etc ... */
struct _mu_nntp
{
/* Working I/O buffer.
io.buf: Working io buffer
io.ptr: Points to the end of the buffer, the non consumed chars
io.nl: Points to the '\n' char in the string
io.len: Len of io_buf. */
struct mu_nntp_work_buf io;
/* Holds the first line response of the last command, i.e the ACK:
ack.buf: Buffer for the ack
ack.ptr: Working pointer, indicate the start of the non consumed chars
ack.len: Size 512 according to RFC2449. */
struct mu_nntp_work_buf ack;
int acknowledge;
/* Holds the buffer/offset etc ... for the article to post. */
struct mu_nntp_post_buf post;
unsigned timeout; /* Default is 10 minutes. */
enum mu_nntp_state state; /* Indicate the state of the running command. */
mu_stream_t carrier; /* TCP Connection. */
};
extern int mu_nntp_debug_cmd (mu_nntp_t);
extern int mu_nntp_debug_ack (mu_nntp_t);
extern int mu_nntp_iterator_create (mu_nntp_t, mu_iterator_t *iterator);
extern int mu_nntp_stream_create (mu_nntp_t nntp, mu_stream_t *pstream);
extern int mu_nntp_carrier_is_ready (mu_stream_t carrier, int flag, int timeout);
extern int mu_nntp_parse_article (mu_nntp_t nntp, int code, unsigned long *pnum, char **mid);
/* Check for non recoverable error.
The error is consider not recoverable if not part of the signal set:
EAGAIN, EINPROGRESS, EINTR.
For unrecoverable error we reset, by moving the working ptr
to the begining of the buffer and setting the state to error.
*/
#define MU_NNTP_CHECK_EAGAIN(nntp, status) \
do \
{ \
if (status != 0) \
{ \
if (status != EAGAIN && status != EINPROGRESS && status != EINTR) \
{ \
nntp->io.ptr = nntp->io.buf; \
nntp->state = MU_NNTP_ERROR; \
} \
return status; \
} \
} \
while (0)
/* If error return.
Check status an reset(see MU_NNTP_CHECK_EAGAIN) the buffer.
*/
#define MU_NNTP_CHECK_ERROR(nntp, status) \
do \
{ \
if (status != 0) \
{ \
nntp->io.ptr = nntp->io.buf; \
nntp->state = MU_NNTP_ERROR; \
return status; \
} \
} \
while (0)
/* Check if we got the rigth. In NNTP protocol and ack of "2xx" means the command was completed.
*/
#define MU_NNTP_CHECK_CODE(nntp, code) \
do \
{ \
if (mu_nntp_response_code (nntp) != code) \
{ \
nntp->state = MU_NNTP_NO_STATE; \
return EACCES; \
} \
} \
while (0)
#define MU_NNTP_CHECK_CODE2(nntp, code1, code2) \
do \
{ \
if (mu_nntp_response_code (nntp) != code1 && mu_nntp_response_code (nntp) != code2) \
{ \
nntp->state = MU_NNTP_NO_STATE; \
return EACCES; \
} \
} \
while (0)
#ifdef __cplusplus
}
#endif
#endif /* _MAILUTILS_SYS_NNTP_H */