/*************************************************************************** * 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) 1999-2015 Insecure.Com * * 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, Insecure.Com LLC * * may be willing to sell alternative licenses (contact * * sales@insecure.com ). * * * * As a special exception to the GPL terms, Insecure.Com 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 (Insecure.Com 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 #include #include 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 (nsp->loglevel == 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_debug(nsp, "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); nsp_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 (nsp->loglevel == 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_debug(nsp, "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); nsp_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; int res, res2; int strlength = 0; char displaystr[256]; va_list ap; va_start(ap,format); nse = event_new(nsp, NSE_TYPE_WRITE, nsi, timeout_msecs, handler, userdata); assert(nse); res = Vsnprintf(buf, sizeof(buf), format, ap); va_end(ap); if (res != -1) { if (res > sizeof(buf)) { buf2 = (char * )safe_malloc(res + 16); res2 = Vsnprintf(buf2, sizeof(buf), format, ap); if (res2 == -1 || res2 > res) { 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 (nsp->loglevel == 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_debug(nsp, "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); nsp_add_event(nsp, nse); return nse->id; }