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-rw-r--r--nsock/src/nsock_write.c236
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diff --git a/nsock/src/nsock_write.c b/nsock/src/nsock_write.c
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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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