/***************************************************************************
* protocols.cc -- Functions relating to the protocol scan and mapping *
* between IPproto Number <-> name. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2018 Insecure.Com LLC ("The Nmap *
* Project"). Nmap is also a registered trademark of the Nmap Project. *
* 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@nmap.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, the Nmap Project 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. *
* *
* The Nmap Project has permission to redistribute Npcap, a packet *
* capturing driver and library for the Microsoft Windows platform. *
* Npcap is a separate work with it's own license rather than this Nmap *
* license. Since the Npcap license does not permit redistribution *
* without special permission, our Nmap Windows binary packages which *
* contain Npcap may not be redistributed without special permission. *
* *
* 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 terms and conditions of this 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, we are happy to help. As mentioned above, we also *
* offer an 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 support and updates. They also fund the continued *
* development of Nmap. Please email sales@nmap.com for further *
* information. *
* *
* If you have received a written license agreement or contract for *
* Covered Software stating terms other than these, you may choose to use *
* and redistribute Covered Software under those terms instead of these. *
* *
* 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 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: protocols.cc 37126 2018-01-28 21:18:17Z fyodor $ */
#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;
}