
/***************************************************************************
 * utils_net.cc -- Miscellanious network-related functions that perform    *
 * various tasks.                                                          *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2010 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.                                                     *
 *                                                                         *
 ***************************************************************************/

#include "NpingTarget.h"

#ifndef UTILS_NET_H
#define UTILS_NET_H 1

#ifndef NETINET_IN_SYSTM_H  /* This guarding is needed for at least some versions of OpenBSD */
#include <netinet/in_systm.h> /* defines n_long needed for netinet/ip.h */
#define NETINET_IN_SYSTM_H
#endif
#ifndef NETINET_IP_H  /* This guarding is needed for at least some versions of OpenBSD */
#include <netinet/ip.h>
#define NETINET_IP_H
#endif

int atoIP(const char *hostname, struct in_addr *dst);
int atoIP(const char *hostname, struct sockaddr_storage *ss, int family);
char *IPtoa(u32 i);
char *IPtoa(struct sockaddr_storage *ss);
char *IPtoa(struct in_addr addr);
char *IPtoa(struct in6_addr addr);
char *IPtoa(struct sockaddr_storage ss);
char *IPtoa(struct sockaddr_storage *ss, int family);
char *IPtoa(u8 *ipv6addr);
u16 sockaddr2port(struct sockaddr_storage *ss);
u16 sockaddr2port(struct sockaddr_storage ss);
u16 sockaddr2port(struct sockaddr_in *s4);
u16 sockaddr2port(struct sockaddr_in6 *s6);
bool isICMPType(u8 type);
bool isICMPCode(u8 code);
bool isICMPCode(u8 code, u8 type);
int getPacketStrInfo(const char *proto, const u8 *packet, u32 len, u8 *dstbuff, u32 dstlen, struct sockaddr_storage *ss_src, struct sockaddr_storage *ss_dst);
int getPacketStrInfo(const char *proto, const u8 *packet, u32 len, u8 *dstbuff, u32 dstlen);
int getNetworkInterfaceName(u32 destination, char *dev);
int getNetworkInterfaceName(struct sockaddr_storage *dst, char *dev);
int nping_getpts_simple(const char *origexpr, u16 **list, int *count);
int resolveCached(char *host, struct sockaddr_storage *ss, size_t *sslen,int pf) ;
struct hostent *gethostbynameCached(char *host);
struct hostent *hostentcpy(struct hostent *src);
int hostentfree(struct hostent *src);
int parseMAC(const char *txt, u8 *targetbuff);
char *MACtoa(u8 *mac);
const char *arppackethdrinfo(const u8 *packet, u32 len, int detail );
int arppackethdrinfo(const u8 *packet, u32 len, u8 *dstbuff, u32 dstlen);
int tcppackethdrinfo(const u8 *packet, size_t len, u8 *dstbuff, size_t dstlen, int detail, struct sockaddr_storage *src, struct sockaddr_storage *dst);
int udppackethdrinfo(const u8 *packet, size_t len, u8 *dstbuff, size_t dstlen, int detail, struct sockaddr_storage *src, struct sockaddr_storage *dst);
const char *getRandomTextPayload();
int send_packet(NpingTarget *target, int rawfd, u8 *pkt, size_t pktLen);
int print_dnet_interface(const struct intf_entry *entry, void *arg) ;
int print_interfaces_dnet();
struct sockaddr_storage *getSrcSockAddrFromIPPacket(u8 *pkt, size_t pktLen);
struct sockaddr_storage *getDestAddrFromICMPPacket(u8 *pkt, size_t pktLen);
u8 *getUDPheaderLocation(u8 *pkt, size_t pktLen);
u8 *getTCPheaderLocation(u8 *pkt, size_t pktLen);
u8 getProtoFromIPPacket(u8 *pkt, size_t pktLen);
u16 *getSrcPortFromIPPacket(u8 *pkt, size_t pktLen);
u16 *getDstPortFromIPPacket(u8 *pkt, size_t pktLen);
u16 *getDstPortFromTCPHeader(u8 *pkt, size_t pktLen);
u16 *getDstPortFromUDPHeader(u8 *pkt, size_t pktLen);
int obtainRawSocket();

#define DEVNAMELEN 16
#define PATH_PROC_IFINET6 "/proc/net/if_inet6"
typedef struct ipv6_interface{
  char devname[DEVNAMELEN];            /* Interface name                    */
  struct sockaddr_storage ss;          /* Address as a sockaddr_storage var */
  u8 addr[16];                         /* Address as a 128bit array         */        
  u16 netmask_bits;                    /* Prefix length                     */
  u8 dev_no;                           /* Netlink device number             */
  u8 scope;                            /* Scope                             */
  u8 flags;                            /* Interface flags                   */
  u8 mac[6];                           /* MAC addr. (I wish we could get it)*/
}if6_t;

int getinterfaces_inet6_linux(if6_t *ifbuf, int max_ifaces);

#define PATH_PROC_IPV6ROUTE "/proc/net/ipv6_route"

typedef struct sys_route6 {
  struct in6_addr dst_net;             /* Destination Network               */
  u8 dst_prefix;                       /* Destination Prefix Length         */
  struct in6_addr src_net;             /* Source Network                    */
  u8 src_prefix;                       /* Source Prefix Length              */
  struct in6_addr next_hop;            /* Gateway - 0 if none               */
  u32 metric;                          /* Metric                            */
  u32 ref_count;                       /* Reference Counter                 */
  u32 use_count;                       /* Use Counter                       */
  u32 flags;                           /* Flags                             */
  char devname[DEVNAMELEN];            /* Device name                       */
}route6_t;

int getroutes_inet6_linux(route6_t *rtbuf, int max_routes);
route6_t *route_dst_ipv6_linux(const struct sockaddr_storage *const dst);

#endif /* UTILS_NET_H */
