수다닷컴

질문 제목 : 덤프파일 수정좀 부탁드립니다.질문 내용 : #include stdio.h
#include stdlib.h
#include arpa/inet.h
#include sys/types.h
#include sys/socket.h
#include net/ethernet.h /* ether_header */
#include netinet/ip.h /* iphdr */
#include netinet/tcp.h /* tcphdr */
#include practical.h
int main (int argc, char *argv[])
{

int sock = socket (pf_packet, sock_raw, htons (eth_p_ip));
if (sock == -1)
{
perror (socket() error);
exit (1);
}
while (1)
{

unsigned char buf[eth_frame_len]; /*1512*/
ssize_t nbrcvd = recv (sock, buf, eth_frame_len, 0);
if (nbrcvd == -1)
error_handling (recv() error);

printf (total %d bytes received...\n, nbrcvd);
printf (---------ethernet header----------\n);
struct ether_header *peh = (struct ether_header*)buf;
printf (destmac-%02x:%02x:%02x:%02x:%02x:%02x\n,
peh-ether_dhost[0], peh-ether_dhost[1],
peh-ether_dhost[2], peh-ether_dhost[3],
peh-ether_dhost[4], peh-ether_dhost[5]);
printf (srcmac-%02x:%02x:%02x:%02x:%02x:%02x\n,
peh-ether_shost[0], peh-ether_shost[1],
peh-ether_shost[2], peh-ether_shost[3],
peh-ether_shost[4], peh-ether_shost[5]);
printf (ethertype-0x%04x\n,ntohs(peh-ether_type));
printf (---------ip header----------\n);
struct iphdr *pih = (struct iphdr*)(buf + sizeof (struct ether_header));
printf (ip version-%d\n, pih-version);
printf (ip header length-%d\n, pih-ihl * 4);
printf (ttl -%d\n, pih-ttl);
printf (---------recv data ----------\n);

for (int i=0; inbrcvd; i++)
printf (%02x , buf[i]);
printf (\n\n);
}
return 0;
}

위에잇는 구문을 수정해서 출력결과가 아래처럼 나오게 수정하려합니다... 진짜 멘탈 깨지네요 ㅠㅠ 도와주세요
total 60 bytes received...
----------ethernet header-----------
dest mac - 00:0d:87:89:4e:57, src mac - 00:07:70:ae:64:60, ether type = 0x0800
----------ip header---------- vb
ip version - 4, ip header length - 20 bytes
src ip - 192.168.0.23, dest ip - 192.268.0.98
----------tcp header----------
src port - 9190, dst port - 45789
----------recv data----------
00 0d 87 89 4e 57 00 07 70 … 생략
... (계속 반복 출력)

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