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/***************************************************************************
* nsock_write.c -- This contains the functions relating to writing to *
* sockets using 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.h"
#include "nsock_internal.h"
#include "nsock_log.h"
#include "netutils.h"
#include <nbase.h>
#include <stdarg.h>
#include <errno.h>
nsock_event_id nsock_sendto(nsock_pool ms_pool, nsock_iod ms_iod, nsock_ev_handler handler, int timeout_msecs,
void *userdata, struct sockaddr *saddr, size_t sslen, unsigned short port, const char *data, int datalen) {
struct npool *nsp = (struct npool *)ms_pool;
struct niod *nsi = (struct niod *)ms_iod;
struct nevent *nse;
char displaystr[256];
struct sockaddr_in *sin = (struct sockaddr_in *)saddr;
#if HAVE_IPV6
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)saddr;
#endif
nse = event_new(nsp, NSE_TYPE_WRITE, nsi, timeout_msecs, handler, userdata);
assert(nse);
if (saddr->sa_family == AF_INET) {
sin->sin_port = htons(port);
#if HAVE_SYS_UN_H
} else if (saddr->sa_family == AF_INET6) {
#else
} else {
#endif
assert(saddr->sa_family == AF_INET6);
#if HAVE_IPV6
sin6->sin6_port = htons(port);
#else
fatal("IPv6 address passed to %s call, but nsock was not compiled w/IPv6 support", __func__);
#endif
}
assert(sslen <= sizeof(nse->writeinfo.dest));
memcpy(&nse->writeinfo.dest, saddr, sslen);
nse->writeinfo.destlen = sslen;
assert(sslen <= sizeof(nse->iod->peer));
memcpy(&nse->iod->peer, saddr, sslen);
nse->iod->peerlen = sslen;
if (datalen < 0)
datalen = (int) strlen(data);
if (NsockLogLevel == NSOCK_LOG_DBG_ALL && datalen < 80) {
memcpy(displaystr, ": ", 2);
memcpy(displaystr + 2, data, datalen);
displaystr[2 + datalen] = '\0';
replacenonprintable(displaystr + 2, datalen, '.');
} else {
displaystr[0] = '\0';
}
nsock_log_info("Sendto request for %d bytes to IOD #%li EID %li [%s]%s",
datalen, nsi->id, nse->id, get_peeraddr_string(nse->iod),
displaystr);
fs_cat(&nse->iobuf, data, datalen);
nsock_pool_add_event(nsp, nse);
return nse->id;
}
/* Write some data to the socket. If the write is not COMPLETED within
* timeout_msecs , NSE_STATUS_TIMEOUT will be returned. If you are supplying
* NUL-terminated data, you can optionally pass -1 for datalen and nsock_write
* will figure out the length itself */
nsock_event_id nsock_write(nsock_pool ms_pool, nsock_iod ms_iod,
nsock_ev_handler handler, int timeout_msecs, void *userdata, const char *data, int datalen) {
struct npool *nsp = (struct npool *)ms_pool;
struct niod *nsi = (struct niod *)ms_iod;
struct nevent *nse;
char displaystr[256];
nse = event_new(nsp, NSE_TYPE_WRITE, nsi, timeout_msecs, handler, userdata);
assert(nse);
nse->writeinfo.dest.ss_family = AF_UNSPEC;
if (datalen < 0)
datalen = (int)strlen(data);
if (NsockLogLevel == NSOCK_LOG_DBG_ALL && datalen < 80) {
memcpy(displaystr, ": ", 2);
memcpy(displaystr + 2, data, datalen);
displaystr[2 + datalen] = '\0';
replacenonprintable(displaystr + 2, datalen, '.');
} else {
displaystr[0] = '\0';
}
nsock_log_info("Write request for %d bytes to IOD #%li EID %li [%s]%s",
datalen, nsi->id, nse->id, get_peeraddr_string(nsi),
displaystr);
fs_cat(&nse->iobuf, data, datalen);
nsock_pool_add_event(nsp, nse);
return nse->id;
}
/* Same as nsock_write except you can use a printf-style format and you can only use this for ASCII strings */
nsock_event_id nsock_printf(nsock_pool ms_pool, nsock_iod ms_iod,
nsock_ev_handler handler, int timeout_msecs, void *userdata, char *format, ...) {
struct npool *nsp = (struct npool *)ms_pool;
struct niod *nsi = (struct niod *)ms_iod;
struct nevent *nse;
char buf[4096];
char *buf2 = NULL;
size_t buf2size;
int res, res2;
int strlength = 0;
char displaystr[256];
va_list ap;
nse = event_new(nsp, NSE_TYPE_WRITE, nsi, timeout_msecs, handler, userdata);
assert(nse);
va_start(ap,format);
res = Vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
if (res >= 0) {
if (res >= sizeof(buf)) {
buf2size = res + 16;
buf2 = (char * )safe_malloc(buf2size);
va_start(ap,format);
res2 = Vsnprintf(buf2, buf2size, format, ap);
va_end(ap);
if (res2 < 0 || (size_t) res2 >= buf2size) {
free(buf2);
buf2 = NULL;
} else
strlength = res2;
} else {
buf2 = buf;
strlength = res;
}
}
if (!buf2) {
nse->event_done = 1;
nse->status = NSE_STATUS_ERROR;
nse->errnum = EMSGSIZE;
} else {
if (strlength == 0) {
nse->event_done = 1;
nse->status = NSE_STATUS_SUCCESS;
} else {
fs_cat(&nse->iobuf, buf2, strlength);
}
}
if (NsockLogLevel == NSOCK_LOG_DBG_ALL &&
nse->status != NSE_STATUS_ERROR &&
strlength < 80) {
memcpy(displaystr, ": ", 2);
memcpy(displaystr + 2, buf2, strlength);
displaystr[2 + strlength] = '\0';
replacenonprintable(displaystr + 2, strlength, '.');
} else {
displaystr[0] = '\0';
}
nsock_log_info("Write request for %d bytes to IOD #%li EID %li [%s]%s",
strlength, nsi->id, nse->id, get_peeraddr_string(nsi),
displaystr);
if (buf2 != buf)
free(buf2);
nsock_pool_add_event(nsp, nse);
return nse->id;
}
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