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packet.cpp
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packet.cpp
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#include "packet.h"
#include <QRegExp>
#include <QDebug>
QString analyzeHttpPacket(struct Packet *index)
{
qDebug() << "AnalyzeHttpPacket";
char* ip_pkt_data = (char*)index->IPv4_header;
u_short sport = ntohs(index->TCP_header->sport);
u_short dport = ntohs(index->TCP_header->dport);
int ip_len = ntohs(index->IPv4_header->tlen);
bool find_http = false;
std::string http_txt = "";
for(int i=0;i<ip_len;++i){
//check the http request
if(!find_http && dport == 80
&& ((i+3<ip_len && strncmp(ip_pkt_data+i,"GET ",strlen("GET ")) ==0 )
|| (i+4<ip_len && strncmp(ip_pkt_data+i,"HEAD ",strlen("HEAD ")) == 0 )
|| (i+4<ip_len && strncmp(ip_pkt_data+i,"POST ",strlen("POST ")) == 0 )
|| (i+3<ip_len && strncmp(ip_pkt_data+i,"PUT ",strlen("PUT ")) == 0 )
|| (i+6<ip_len && strncmp(ip_pkt_data+i,"OPTION ",strlen("OPTION ")) == 0 ))
)
{
find_http = true;
}
//check the http response
if(!find_http && sport == 80 && i+8<ip_len && strncmp(ip_pkt_data+i,"HTTP/1.1 ",strlen("HTTP/1.1 "))==0)
{
find_http = true;
}
//collect the http text
if(find_http && (isalnum(ip_pkt_data[i]) || ispunct(ip_pkt_data[i]) || \
isspace(ip_pkt_data[i]) || isprint(ip_pkt_data[i])))
{
http_txt += ip_pkt_data[i];
}
}
qDebug() << "HTTP content:" << QString(http_txt.c_str());
if (find_http)
{
index->Apppro = "HTTP";
return QString(http_txt.c_str());
}
else
{
index->Apppro = "";
return QString("");
}
}
Ethernet::~Ethernet()
{
}
Ethernet::Ethernet(ethernet_header *eth)
{
eth_hdr = eth;
mac_address dhost = eth_hdr->ether_dhost;
mac_address shost = eth_hdr->ether_shost;
type = eth_hdr->ether_type;
switch(type)
{
case ETHER_TYPE_IPv4:
type_str = QString("IPv4");
break;
case ETHER_TYPE_IPv6:
type_str = QString("IPv6");
break;
case ETHER_TYPE_ARP:
type_str = QString("ARP");
break;
case ETHER_TYPE_RARP:
type_str = QString("RARP");
break;
default:
type_str = QString("UNKNOWN");
break;
}
dhost_str = mactos(dhost);
shost_str = mactos(shost);
// qDebug() << "Type:" << type;
// qDebug()<<"Dhost:" <<dhost_str;
// qDebug() << "Shost:" << shost_str;
}
IP::~IP(){}
IP::IP(ip_header *ih)
{
ip_hdr = ih;
ver = (ntohs(ip_hdr->ver_ihl)&0xf000)>>12;
hdr_len = (ntohs(ip_hdr->ver_ihl)&0x0f00)>>8;
tos = ntohs(ip_hdr->tos);
tlen = ntohs(ip_hdr->tlen);
flags = (ntohs(ip_hdr->flags_fo)&0xe000)>>13;
flags_str = QString("");
if(flags&0b100) flags_str += QString("Reserved bit set");
if(flags&0b010) flags_str += QString("Don't fragment set");
if(flags&0b001) flags_str += QString("More fragments set");
ttl = ip_hdr->ttl;
proto = ip_hdr->proto;
switch(proto)
{
case PROTO_TYPE_ICMP:
proto_str = QString("ICMP");
break;
case PROTO_TYPE_TCP:
proto_str = QString("TCP");
break;
case PROTO_TYPE_UDP:
proto_str = QString("UDP");
break;
case PROTO_TYPE_ICMPv6:
proto_str = QString("IPv6");
break;
default:
proto_str = QString("UNKNOWN");
break;
}
src_str = QString("%1.%2.%3.%4")\
.arg(ip_hdr->saddr.byte1)\
.arg(ip_hdr->saddr.byte2)\
.arg(ip_hdr->saddr.byte3)\
.arg(ip_hdr->saddr.byte4);
dst_str = QString("%1.%2.%3.%4")\
.arg(ip_hdr->daddr.byte1)\
.arg(ip_hdr->daddr.byte2)\
.arg(ip_hdr->daddr.byte3)\
.arg(ip_hdr->daddr.byte4);
crc = ip_hdr->crc;
ident = ip_hdr->identification;
// qDebug() << "############# IP INFO #############";
// qDebug() << "Version: " << ver;
// qDebug() << "Header len: "<< hdr_len;
// qDebug() << "Type of service: " << tos;
// qDebug() << "total len: " << tlen;
// qDebug() << "flags : "<< flags;
// qDebug() <<"TTL: "<<ttl;
// qDebug() <<"Protocol: " << proto;
// qDebug() <<"Source: "<< src;
// qDebug() << "Destination: " <<dst;
// qDebug() << "CRC: " << crc;
// qDebug() << "Identical: " << ident;
}
TCP::~TCP()
{
}
TCP::TCP(tcp_header *th)
{
tcp_hdr = th;
src_port = QString::number(ntohs(tcp_hdr->sport));
dst_port = QString::number(ntohs(tcp_hdr->dport));
seq_num = QString::number(ntohs(tcp_hdr->seq));
ack_num = QString::number(ntohs(tcp_hdr->ack));
data_offset = QString::number((ntohs(tcp_hdr->tcp_res)&0xf000)>>12);
flags = ntohs(tcp_hdr->tcp_res)&0x003f;
URG = flags & 0x0020;
ACK = flags & 0x0010;
PSH = flags & 0x0008;
RST = flags & 0x0004;
SYN = flags & 0x0002;
FIN = flags & 0x0001;
window_size = QString::number(ntohs(tcp_hdr->windsize));
crc = QString::number(ntohs(tcp_hdr->crc));
urgp = QString(ntohs(tcp_hdr->urgp));
// qDebug() << "############# TCP INFO #############";
// qDebug() << "Src port : "<< src_port;
// qDebug() << "Dst port: " << dst_port;
// qDebug() << "seq number : "<< seq_num;
// qDebug() << "ack number : " << ack_num;
// qDebug() << "data offset: " << data_offset;
// qDebug() << "flags : " << flags;
// qDebug() << QString("URG:%1,ACK:%2,PSH:%3,RST:%4,SYN:%5,FIN:%6;").arg(URG).arg(ACK).arg(PSH).arg(RST).arg(SYN).arg(FIN);
// qDebug() << "Window size: " << window_size;
// qDebug() << "Checksum : "<< crc;
// qDebug() << "Urg pointer: "<< urgp;
}
UDP::~UDP()
{
}
UDP::UDP(udp_header *uh)
{
udp_hdr = uh;
src_port = QString::number(ntohs(udp_hdr->sport));
dst_port = QString::number(ntohs(udp_hdr->dport));
length = QString::number(ntohs(udp_hdr->len));
crc = QString::number(ntohs(udp_hdr->crc));
// qDebug() << "############# UDP INFO #############";
// qDebug() << "Src port : "<< src_port;
// qDebug() << "Dst port: " << dst_port;
// qDebug() << "Length: "<< length;
// qDebug() << "Checksum: "<< crc;
}
QString escape(QString origin)
{
QString replaced(origin);
replaced.replace(QString("\r"),QString("\\r"));
replaced.replace(QString("\n"),QString("\\n"));
return replaced;
}
HTTP::HTTP(){}
HTTP::~HTTP(){}
HTTP::HTTP(QString text)
{
QRegExp httpGetMethodReg("GET .+\r\n");
httpGetMethodReg.setMinimal(true);
QRegExp httpHostReg("Host: .+\r\n");
httpHostReg.setMinimal(true);
QRegExp httpConnectionReg("Connection: .+\r\n");
httpConnectionReg.setMinimal(true);
QRegExp httpCacheControlReg("Cache-Control: .+\r\n");
httpCacheControlReg.setMinimal(true);
QRegExp httpUserAgentReg("User-Agent: .+\r\n");
httpUserAgentReg.setMinimal(true);
QRegExp httpAcceptReg("Accept: .+\r\n");
httpAcceptReg.setMinimal(true);
QRegExp httpResponseReg("HTTP/1.1 .+\r\n");
httpResponseReg.setMinimal(true);
if (httpGetMethodReg.indexIn(text) > -1) httpMethod = httpGetMethodReg.cap(0);
if (httpHostReg.indexIn(text) > -1) httpHost = httpHostReg.cap(0);
if (httpConnectionReg.indexIn(text) > -1) httpConnection = httpConnectionReg.cap(0);
if (httpCacheControlReg.indexIn(text) > -1) httpCacheControl = httpCacheControlReg.cap(0);
if (httpUserAgentReg.indexIn(text) > -1) httpUserAgent = httpUserAgentReg.cap(0);
if (httpAcceptReg.indexIn(text) > -1) httpAccept = httpAcceptReg.cap(0);
if (httpResponseReg.indexIn(text) > -1) httpResponse = httpResponseReg.cap(0);
httpMethod = escape(httpMethod);
httpHost = escape(httpHost);
httpConnection = escape(httpConnection);
httpCacheControl = escape(httpCacheControl);
httpUserAgent = escape(httpUserAgent);
httpAccept = escape(httpAccept);
httpResponse = escape(httpResponse);
// qDebug() << "httpInfo method:" << httpMethod;
// qDebug() << "httpInfo Response:" << httpResponse;
// qDebug() << "httpInfo host:" << httpHost;
// qDebug() << "httpInfo connection:" << httpConnection;
// qDebug() << "httpInfo cachecontrol:" << httpCacheControl;
// qDebug() << "httpInfo UserAgent:" << httpUserAgent;
// qDebug() << "httpInfo Accept:" << httpAccept;
}
ARP::~ARP()
{
}
ARP::ARP(arp_header *ah)
{
arp_hdr = ah;
hd_type = QString::number(ntohs(arp_hdr->hardware_type));
proto_type = ntohs(arp_hdr->protocal_type);
switch(proto_type)
{
case ETHER_TYPE_IPv4:
proto_type_str = QString("IPv4");
break;
case ETHER_TYPE_IPv6:
proto_type_str = QString("IPv6");
break;
default:
proto_type_str = QString("UNKNOWN");
break;
}
hd_len = QString::number(arp_hdr->hwadd_len);
pro_addr_len = QString::number(arp_hdr->proadd_len);
opcode = ntohs(arp_hdr->opcode);
switch(opcode)
{
case ARPOP_REQUEST:
opcode_str = QString("ARP Request");
break;
case ARPOP_REPLY:
opcode_str = QString("ARP Reply");
break;
case ARPOP_RREQUEST:
opcode_str = QString("RARP Request.");
break;
case ARPOP_RREPLY:
opcode_str = QString("RARP Reply");
break;
default:
opcode_str = QString("UNKNOWN ARP opcode");
break;
}
src_addr = mactos(arp_hdr->snether_address);
dst_addr = mactos(arp_hdr->dnether_address);
sip_addr = iptos(arp_hdr->sip_address);
dip_addr = iptos(arp_hdr->dip_address);
// qDebug() << "hd_type:" << hd_type;
// qDebug() << "proto_type: "<< proto_type;
// qDebug() << "hd_len" << hd_len;
// qDebug() << "proto_addr_len" << pro_addr_len;
// qDebug() << "opcode" << opcode;
// qDebug() << "opcode_str" << opcode_str;
}