/*************************************************************************** * protocols.cc -- Functions relating to the protocol scan and mapping * * between IPproto Number <-> name. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2013 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program 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 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS * * AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your right to use, * * modify, and redistribute this software under certain conditions. If * * you wish to embed Nmap technology into proprietary software, we sell * * alternative licenses (contact sales@insecure.com). Dozens of software * * vendors already license Nmap technology such as host discovery, port * * scanning, OS detection, version detection, and the Nmap Scripting * * Engine. * * * * Note that the GPL places important restrictions on "derivative works", * * yet it does not provide a detailed definition of that term. To avoid * * misunderstandings, we interpret that term as broadly as copyright law * * allows. For example, we consider an application to constitute a * * derivative work for the purpose of this license if it does any of the * * following with any software or content covered by this license * * ("Covered Software"): * * * * o Integrates source code from Covered Software. * * * * o Reads or includes copyrighted data files, such as Nmap's nmap-os-db * * or nmap-service-probes. * * * * o Is designed specifically to execute Covered Software and parse the * * results (as opposed to typical shell or execution-menu apps, which will * * execute anything you tell them to). * * * * o Includes Covered Software in a proprietary executable installer. The * * installers produced by InstallShield are an example of this. Including * * Nmap with other software in compressed or archival form does not * * trigger this provision, provided appropriate open source decompression * * or de-archiving software is widely available for no charge. For the * * purposes of this license, an installer is considered to include Covered * * Software even if it actually retrieves a copy of Covered Software from * * another source during runtime (such as by downloading it from the * * Internet). * * * * o Links (statically or dynamically) to a library which does any of the * * above. * * * * o Executes a helper program, module, or script to do any of the above. * * * * This list is not exclusive, but is meant to clarify our interpretation * * of derived works with some common examples. Other people may interpret * * the plain GPL differently, so we consider this a special exception to * * the GPL that we apply to Covered Software. Works which meet any of * * these conditions must conform to all of the terms of this license, * * particularly including the GPL Section 3 requirements of providing * * source code and allowing free redistribution of the work as a whole. * * * * As another 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. * * * * Any redistribution of Covered Software, including any derived works, * * must obey and carry forward all of the terms of this license, including * * obeying all GPL rules and restrictions. For example, source code of * * the whole work must be provided and free redistribution must be * * allowed. All GPL references to "this License", are to be treated as * * including the special and conditions of the license text as well. * * * * Because this license imposes special exceptions to the GPL, Covered * * Work may not be combined (even as part of a larger work) with plain GPL * * software. The terms, conditions, and exceptions of this license must * * be included as well. This license is incompatible with some other open * * source licenses as well. In some cases we can relicense portions of * * Nmap or grant special permissions to use it in other open source * * software. Please contact fyodor@nmap.org with any such requests. * * Similarly, we don't incorporate incompatible open source software into * * Covered Software without special permission from the copyright holders. * * * * If you have any questions about the licensing restrictions on using * * Nmap in other works, are happy to help. As mentioned above, we also * * offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates. They also fund the * * continued development of Nmap. Please email sales@insecure.com for * * further information. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * 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 (none * * have been found so far). * * * * 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 Nmap * * license file for more details (it's in a COPYING file included with * * Nmap, and also available from https://svn.nmap.org/nmap/COPYING * * * ***************************************************************************/ /* $Id$ */ #include "protocols.h" #include "NmapOps.h" #include "services.h" #include "charpool.h" #include "nmap_error.h" #include "utils.h" extern NmapOps o; static int numipprots = 0; static struct protocol_list *protocol_table[PROTOCOL_TABLE_SIZE]; static int protocols_initialized = 0; static int nmap_protocols_init() { if (protocols_initialized) return 0; char filename[512]; FILE *fp; char protocolname[128]; unsigned short protno; char *p; char line[1024]; int lineno = 0; struct protocol_list *current, *previous; int res; if (nmap_fetchfile(filename, sizeof(filename), "nmap-protocols") != 1) { error("Unable to find nmap-protocols! Resorting to /etc/protocols"); strcpy(filename, "/etc/protocols"); } fp = fopen(filename, "r"); if (!fp) { fatal("Unable to open %s for reading protocol information", filename); } /* Record where this data file was found. */ o.loaded_data_files["nmap-protocols"] = filename; memset(protocol_table, 0, sizeof(protocol_table)); while(fgets(line, sizeof(line), fp)) { lineno++; p = line; while(*p && isspace((int) (unsigned char) *p)) p++; if (*p == '#') continue; res = sscanf(line, "%127s %hu", protocolname, &protno); if (res !=2) continue; /* Now we make sure our protocols don't have duplicates */ for(current = protocol_table[protno % PROTOCOL_TABLE_SIZE], previous = NULL; current; current = current->next) { if (protno == current->protoent->p_proto) { if (o.debugging) { error("Protocol %d is duplicated in protocols file %s", ntohs(protno), filename); } break; } previous = current; } if (current) continue; numipprots++; current = (struct protocol_list *) cp_alloc(sizeof(struct protocol_list)); current->protoent = (struct protoent *) cp_alloc(sizeof(struct protoent)); current->next = NULL; if (previous == NULL) { protocol_table[protno % PROTOCOL_TABLE_SIZE] = current; } else { previous->next = current; } current->protoent->p_name = cp_strdup(protocolname); current->protoent->p_proto = protno; current->protoent->p_aliases = NULL; } fclose(fp); protocols_initialized = 1; return 0; } /* Adds protocols whose names match mask to porttbl. * Increases the prot_count in ports by the number of protocols added. * Returns the number of protocols added. */ int addprotocolsfromservmask(char *mask, u8 *porttbl) { struct protocol_list *current; int bucket, t=0; if (!protocols_initialized && nmap_protocols_init() == -1) fatal("%s: Couldn't get protocol numbers", __func__); for(bucket = 0; bucket < PROTOCOL_TABLE_SIZE; bucket++) { for(current = protocol_table[bucket % PROTOCOL_TABLE_SIZE]; current; current = current->next) { if (wildtest(mask, current->protoent->p_name)) { porttbl[ntohs(current->protoent->p_proto)] |= SCAN_PROTOCOLS; t++; } } } return t; } struct protoent *nmap_getprotbynum(int num) { struct protocol_list *current; if (nmap_protocols_init() == -1) return NULL; for(current = protocol_table[num % PROTOCOL_TABLE_SIZE]; current; current = current->next) { if (num == current->protoent->p_proto) return current->protoent; } /* Couldn't find it ... oh well. */ return NULL; }