c - cソケットプログラムを使用して、キャプチャしたパケットをtxtファイルの代わりにLibreOffice Calcに保存する方法は?

Question

私のプロジェクトは、クライアント側でプロミスキャスモードでパケットをキャプチャし、サーバー側で処理 (tcp、udp、icmp を区別) することです。これは、ubuntu 13.04 の C ソケットコードを使用して行われます。

現在、出力はtxtファイルに保存されていますが、これらのパケットフィールドをLibreOffice Calcのセルに保存して、セルを編集して必要なパケットのみを選択できるようにしたいと考えています。

それができるかどうかわかりませんか？可能であれば誰でも私を助けてもらえますか?また、それを行う方法は?

私の出力txtファイルはこのようになります（ここではudpパケットのみが表示されます）

 This Report is from the Task agent whose IP is 127.0.0.1


 ***********************UDP Packet*************************

Ethernet Header
|-Destination Address : 01-00-5E-00-00-02 
|-Source Address      : 00-00-0C-07-AC-3B 
|-Protocol            : 8 

IP Header
|-IP Version        : 4
|-IP Header Length  : 5 DWORDS or 20 Bytes
|-Type Of Service   : 192
|-IP Total Length   : 48  Bytes(Size of Packet)
|-Identification    : 0
|-TTL      : 1
|-Protocol : 17
|-Checksum : 61927
|-Source IP        : 172.16.59.3
|-Destination IP   : 224.0.0.2

UDP Header
|-Source Port      : 1985
|-Destination Port : 1985
|-UDP Length       : 28
|-UDP Checksum     : 42701

IP Header
01 00 5E 00 00 02 00 00 0C 07 AC 3B 08 00 45 C0         ..^........;..E.
00 30 00 00                                             .0..
UDP Header
00 00 01 11 F1 E7 AC 10                                 ........
Data Payload
00 00 10 03 0A 6E 3B 00 63 69 73 63 6F 00 00 00         .....n;.cisco...
AC 10 3B 01 00 00 00 00 00 00 00 00 00 00 00 00         ..;.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00                                       ......

###########################################################

これらすべてのフィールドをセル(行)に保存する必要があります。どうすればできますか??

edited part

これは、サーバー側でパケットを処理する方法です

FILE *logfile;
int infile;
struct sockaddr_in source,dest;
int tcp=0,udp=0,icmp=0,others=0,igmp=0,total=0,i,j;

int main()
{
int saddr_size,data_size;  
struct sockaddr saddr;   
unsigned char *buffer3 = (unsigned char *) malloc(1024);
char *fname = "/home/shishira/Desktop/packet_capture/task_agent_processed.txt";
infile=open("info_agent_report.txt",O_RDONLY);
if(infile==-1)
 {
    perror("cannot open info_agent_report file\n");
    return(1);
 }  

logfile=fopen("task_agent_processed.txt","w");
if(logfile==NULL)
 {
printf("Unable to create task_agent_processed file.");
 }

printf("\n Starting..\n");
saddr_size = sizeof saddr;     

do
{   

 data_size=read(infile,buffer3,1024);

 ProcessPacket(buffer3 , data_size);  

 }
while(data_size>0);


fclose(logfile);
close(infile);   
printf("\n");
printf(" Finished\n\n");
printf("-------------------\n\n");
return 0;
}

void ProcessPacket(unsigned char* buffer, int size)
{
 //Get the IP Header part of this packet , excluding the ethernet header
 struct iphdr *iph = (struct iphdr*)(buffer + sizeof(struct ethhdr));
 ++total;
 switch (iph->protocol) //Check the Protocol and do accordingly...
  {
  case 1:  //ICMP Protocol
    ++icmp;
    print_icmp_packet( buffer , size);
    break;

case 2:  //IGMP Protocol
    ++igmp;
    break;

case 6:  //TCP Protocol
    ++tcp;
    print_tcp_packet(buffer , size);
    break;

case 17: //UDP Protocol
    ++udp;
    print_udp_packet(buffer , size);
    break;

default: //Some Other Protocol like ARP etc.
    ++others;
    break;
}

printf("            TCP : %d   UDP : %d   ICMP : %d   Others : %d   Total : %d\r", tcp ,  

udp , icmp  , others , total);   
}


void print_udp_packet(unsigned char *Buffer , int Size)
{     
 unsigned short iphdrlen;

 struct iphdr *iph = (struct iphdr *)(Buffer +  sizeof(struct ethhdr));
 iphdrlen = iph->ihl*4;

 struct udphdr *udph = (struct udphdr*)(Buffer + iphdrlen  + sizeof(struct ethhdr));

 int header_size =  sizeof(struct ethhdr) + iphdrlen + sizeof udph;

 fprintf(logfile , "\n\n***********************UDP Packet*************************\n");

 print_ip_header(Buffer,Size);          

 fprintf(logfile , "\nUDP Header\n");
 fprintf(logfile , "   |-Source Port      : %d\n" , ntohs(udph->source));
 fprintf(logfile , "   |-Destination Port : %d\n" , ntohs(udph->dest));
 fprintf(logfile , "   |-UDP Length       : %d\n" , ntohs(udph->len));
 fprintf(logfile , "   |-UDP Checksum     : %d\n" , ntohs(udph->check));

 fprintf(logfile , "\n");
 fprintf(logfile , "IP Header\n");
 PrintData(Buffer , iphdrlen);

 fprintf(logfile , "UDP Header\n");
 PrintData(Buffer+iphdrlen , sizeof udph);

 fprintf(logfile , "Data Payload\n");   

 //Move the pointer ahead and reduce the size of string
 PrintData(Buffer + header_size , Size - header_size);

 fprintf(logfile , "\n###########################################################");
}
}
}

ここに udp パケットを含めました。ここで fprintf ステートメントでは、ファイルハンドラーが「logfile」であるファイル内のすべてのパケットを出力するために使用しています。私が得る出力はこのように見えます

c - cソケットプログラムを使用して、キャプチャしたパケットをtxtファイルの代わりにLibreOffice Calcに保存する方法は?

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