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/***************************************************************************
* nsock_read.c -- This contains the functions for requesting various read *
* events from the nsock parallel socket event library *
* *
***********************IMPORTANT NSOCK LICENSE TERMS***********************
*
* The nsock parallel socket event library is (C) 1999-2023 Nmap Software LLC
* This library is free software; you may redistribute and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; Version 2. This guarantees your right to use, modify, and
* redistribute this software under certain conditions. If this license is
* unacceptable to you, Nmap Software LLC may be willing to sell alternative
* licenses (contact sales@nmap.com ).
*
* As a special exception to the GPL terms, Nmap Software LLC grants permission
* to link the code of this program with any version of the OpenSSL library
* which is distributed under a license identical to that listed in the included
* docs/licenses/OpenSSL.txt file, and distribute linked combinations including
* the two. You must obey the GNU GPL in all respects for all of the code used
* other than OpenSSL. If you modify this file, you may extend this exception to
* your version of the file, but you are not obligated to do so.
*
* If you received these files with a written license agreement stating terms
* other than the (GPL) terms above, then that alternative license agreement
* takes precedence over this comment.
*
* Source is provided to this software because we believe users have a right to
* know exactly what a program is going to do before they run it. This also
* allows you to audit the software for security holes.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and add
* new features. You are highly encouraged to send your changes to the
* dev@nmap.org mailing list for possible incorporation into the main
* distribution. By sending these changes to Fyodor or one of the Insecure.Org
* development mailing lists, or checking them into the Nmap source code
* repository, it is understood (unless you specify otherwise) that you are
* offering the Nmap Project (Nmap Software LLC) the unlimited, non-exclusive
* right to reuse, modify, and relicense the code. Nmap will always be available
* Open Source, but this is important because the inability to relicense code
* has caused devastating problems for other Free Software projects (such as KDE
* and NASM). We also occasionally relicense the code to third parties as
* discussed above. If you wish to specify special license conditions of your
* contributions, just say so when you send them.
*
* This program 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 General Public License v2.0 for more
* details (http://www.gnu.org/licenses/gpl-2.0.html).
*
***************************************************************************/
/* $Id$ */
#include "nsock_internal.h"
#include "nsock_log.h"
#include "netutils.h"
/* Read up to nlines lines (terminated with \n, which of course includes \r\n),
* or until EOF, or until the timeout, whichever comes first. Note that
* NSE_STATUS_SUCCESS will be returned in the case of EOF or timeout if at least
* 1 char has been read. Also note that you may get more than 'nlines' back --
* we just stop once "at least" 'nlines' is read */
nsock_event_id nsock_readlines(nsock_pool nsp, nsock_iod ms_iod,
nsock_ev_handler handler, int timeout_msecs,
void *userdata, int nlines) {
struct niod *nsi = (struct niod *)ms_iod;
struct npool *ms = (struct npool *)nsp;
struct nevent *nse;
nse = event_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
assert(nse);
nsock_log_info("Read request for %d lines from IOD #%li [%s] EID %li",
nlines, nsi->id, get_peeraddr_string(nsi), nse->id);
nse->readinfo.read_type = NSOCK_READLINES;
nse->readinfo.num = nlines;
nsock_pool_add_event(ms, nse);
return nse->id;
}
/* Same as above, except it tries to read at least 'nbytes' instead of 'nlines'. */
nsock_event_id nsock_readbytes(nsock_pool nsp, nsock_iod ms_iod,
nsock_ev_handler handler, int timeout_msecs,
void *userdata, int nbytes) {
struct niod *nsi = (struct niod *)ms_iod;
struct npool *ms = (struct npool *)nsp;
struct nevent *nse;
nse = event_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
assert(nse);
nsock_log_info("Read request for %d bytes from IOD #%li [%s] EID %li",
nbytes, nsi->id, get_peeraddr_string(nsi), nse->id);
nse->readinfo.read_type = NSOCK_READBYTES;
nse->readinfo.num = nbytes;
nsock_pool_add_event(ms, nse);
return nse->id;
}
/* The simplest read function -- returns NSE_STATUS_SUCCESS when it
* reads anything, otherwise it returns timeout, eof, or error as appropriate */
nsock_event_id nsock_read(nsock_pool nsp, nsock_iod ms_iod,
nsock_ev_handler handler, int timeout_msecs,
void *userdata) {
struct niod *nsi = (struct niod *)ms_iod;
struct npool *ms = (struct npool *)nsp;
struct nevent *nse;
nse = event_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
assert(nse);
nsock_log_info("Read request from IOD #%li [%s] (timeout: %dms) EID %li",
nsi->id, get_peeraddr_string(nsi), timeout_msecs, nse->id);
nse->readinfo.read_type = NSOCK_READ;
nsock_pool_add_event(ms, nse);
return nse->id;
}
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