/*************************************************************************** * protocols.cc -- Functions relating to the protocol scan and mapping * * between IPproto Number <-> name. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2011 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 with the clarifications and exceptions described * * below. 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, and version detection. * * * * Note that the GPL places important restrictions on "derived works", yet * * it does not provide a detailed definition of that term. To avoid * * misunderstandings, we consider an application to constitute a * * "derivative work" for the purpose of this license if it does any of the * * following: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap. This list is not exclusive, but is meant to clarify our * * interpretation of derived works with some common examples. Our * * interpretation applies only to Nmap--we don't speak for other people's * * GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be 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 as well as helping to * * fund the continued development of Nmap technology. Please email * * sales@insecure.com for further information. * * * * 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 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 nmap-dev@insecure.org for possible incorporation into the main * * distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, it is assumed 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 at * * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file * * included with Nmap. * * * ***************************************************************************/ /* $Id$ */ #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; protno = htons(protno); /* Now we make sure our protocols don't have duplicates */ for(current = protocol_table[0], 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] = 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; }