mirror of
https://github.com/ntop/ntopng.git
synced 2026-05-20 00:57:00 +00:00
207 lines
6.2 KiB
C++
207 lines
6.2 KiB
C++
/*
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*
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* (C) 2013-20 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ntop_includes.h"
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/* *************************************** */
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ICMPinfo::ICMPinfo() {
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unreach = NULL;
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reset();
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}
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/* *************************************** */
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ICMPinfo::ICMPinfo(const ICMPinfo& _icmp_info) {
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unreach = NULL;
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reset();
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icmp_type = _icmp_info.icmp_type,
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icmp_code = _icmp_info.icmp_code,
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icmp_identifier = _icmp_info.icmp_identifier;
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if(_icmp_info.unreach
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&& (unreach = (unreachable_t*)calloc(1, sizeof(*unreach)))) {
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unreach->src_ip.set(&_icmp_info.unreach->src_ip),
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unreach->dst_ip.set(&_icmp_info.unreach->dst_ip);
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unreach->src_port = _icmp_info.unreach->src_port,
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unreach->dst_port = _icmp_info.unreach->dst_port;
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unreach->protocol = _icmp_info.unreach->protocol;
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}
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}
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/* *************************************** */
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void ICMPinfo::reset() {
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if(unreach) free(unreach);
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unreach = NULL;
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icmp_type = icmp_code = icmp_identifier = 0;
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}
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/* *************************************** */
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ICMPinfo::~ICMPinfo() {
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if(unreach) free(unreach);
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}
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/* *************************************** */
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u_int32_t ICMPinfo::key() const {
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u_int32_t k = 0;
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if(unreach) {
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k += unreach->src_ip.key() + unreach->dst_ip.key() + unreach->src_port + unreach->dst_port + unreach->protocol;
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}
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if(icmp_identifier)
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k += icmp_identifier;
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return k;
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}
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/* *************************************** */
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void ICMPinfo::dissectICMP(u_int16_t const payload_len, const u_int8_t * const payload_data) {
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reset();
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if(payload_len > 2) {
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icmp_type = payload_data[0], icmp_code = payload_data[1];
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if(icmp_type == ICMP_DEST_UNREACH && icmp_code == ICMP_PORT_UNREACH
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&& payload_len >= sizeof(struct ndpi_iphdr)) {
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struct ndpi_iphdr *icmp_port_unreach_ip = (struct ndpi_iphdr *)&payload_data[8];
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u_short icmp_port_unreach_iph_len = (u_short)(icmp_port_unreach_ip->ihl * 4);
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if(payload_len >= icmp_port_unreach_iph_len + sizeof(struct ndpi_udphdr)
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&& icmp_port_unreach_ip->protocol == IPPROTO_UDP
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&& (unreach
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|| (unreach = (unreachable_t*)calloc(1, sizeof(*unreach))))) {
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struct ndpi_udphdr *icmp_port_unreach_udp = (struct ndpi_udphdr *)&payload_data[8 + icmp_port_unreach_iph_len];
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unreach->src_ip.set(icmp_port_unreach_ip->saddr),
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unreach->dst_ip.set(icmp_port_unreach_ip->daddr),
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unreach->src_port = icmp_port_unreach_udp->source,
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unreach->dst_port = icmp_port_unreach_udp->dest,
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unreach->protocol = icmp_port_unreach_ip->protocol;
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}
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} else if((icmp_type == ICMP_ECHO || icmp_type == ICMP_ECHOREPLY
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|| icmp_type == ICMP_TIMESTAMP || icmp_type == ICMP_TIMESTAMPREPLY
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|| icmp_type == ICMP_INFO_REQUEST || icmp_type == ICMP_INFO_REPLY)
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&& icmp_code == 0
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&& payload_len > 5) {
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/* https://tools.ietf.org/html/rfc792
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Echo or Echo Reply Message
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Timestamp or Timestamp Reply Message
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Information Request or Information Reply Message
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Identifier
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If code = 0, an identifier to aid in matching echos and replies,
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may be zero.
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*/
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icmp_identifier = ntohs(*(u_int16_t*)&payload_data[4]);
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// ntop->getTrace()->traceEvent(TRACE_NORMAL, "identifier: 0x%X [0x%x%x]", icmp_identifier, payload_data[4], payload_data[5]);
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}
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}
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}
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/* *************************************** */
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void ICMPinfo::print() const {
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char buf1[64], buf2[64];
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "[icmp type: %u][icmp code: %u]", icmp_type, icmp_code);
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if(unreach) {
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Port unreachable: [src: %s:%u][dst: %s:%u]",
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unreach->src_ip.print(buf1, sizeof(buf1)), unreach->src_port,
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unreach->dst_ip.print(buf2, sizeof(buf2)), unreach->dst_port);
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}
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if(icmp_identifier)
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "[identifier: 0x%x]", icmp_identifier);
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}
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/* *************************************** */
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bool ICMPinfo::equal(const ICMPinfo * const _icmp_info) const {
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if(!_icmp_info)
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return false;
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unreachable_t *ur = _icmp_info->getUnreach();
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if(unreach && ur) {
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bool equal = unreach->src_ip.equal(&ur->src_ip)
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&& unreach->dst_ip.equal(&ur->dst_ip)
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&& unreach->src_port == ur->src_port
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&& unreach->dst_port == ur->dst_port
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&& unreach->protocol == ur->protocol;
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return equal;
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}
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if(icmp_identifier)
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return icmp_identifier == _icmp_info->icmp_identifier;
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/* TODO: possibly add checks on icmp type and code */
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return true;
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}
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/* *************************************** */
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void ICMPinfo::lua(lua_State* vm, AddressTree * ptree, NetworkInterface *iface, u_int16_t vlan_id) const {
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char buf[64];
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if(vm && unreach) {
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lua_newtable(vm);
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lua_push_str_table_entry(vm, "src_ip", unreach->src_ip.print(buf, sizeof(buf)));
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lua_push_str_table_entry(vm, "dst_ip", unreach->dst_ip.print(buf, sizeof(buf)));
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lua_push_uint64_table_entry(vm, "src_port", ntohs(unreach->src_port));
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lua_push_uint64_table_entry(vm, "dst_port", ntohs(unreach->dst_port));
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lua_push_uint64_table_entry(vm, "protocol", unreach->protocol);
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lua_pushstring(vm, "unreach");
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lua_insert(vm, -2);
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lua_settable(vm, -3);
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}
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}
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/* *************************************** */
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bool ICMPinfo::isPortUnreachable() const{
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if((icmp_type == ICMP_DEST_UNREACH && icmp_code == ICMP_PORT_UNREACH) ||
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(icmp_type == ICMP6_DEST_UNREACH && icmp_code == ICMP6_PORT_UNREACH ))
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{
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return true;
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}
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return false;
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}
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/* *************************************** */
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bool ICMPinfo::isHostUnreachable(u_int8_t proto) const{
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if(proto == IPPROTO_ICMP && icmp_type == ICMP_DEST_UNREACH && icmp_code == ICMP_HOST_UNREACH){
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return true;
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}
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return false;
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}
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