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|
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <pcap.h>
#include <pcap-bpf.h>
#include <netinet/in.h>
#include <net/ethernet.h>
#include <netinet/ether.h>
#include <linux/tcp.h>
#include <netinet/ip.h>
char **str_split(char *s, const char *ct)
{
char **tab=NULL;
int i;
char *cs=NULL;
size_t size=1;
void *temp=NULL;
//printf("test\n");
if(s!=NULL && ct != NULL)
{
for(i=0; (cs=strtok(s,ct)); i++)
{
if(size <=i+1){
size <<=1;
temp=realloc(tab,sizeof(*tab) * size);
if(temp!=NULL){
tab=temp;
}
else{
fprintf(stderr,"mémoire insffisante\n");
free(tab);
tab=NULL;
exit(EXIT_FAILURE);
}
}
tab[i]=cs;
s=NULL;
}
tab[i]=NULL;
}
return tab;
}
char *rebuild_mac(char **mac_digit){
int index_temp=0;
char mac_address[20];
// printf("Test rebuild_mac\n");
strcpy(mac_address,"\0");
while(index_temp <6)
{
if(index_temp!=0 && index_temp<6){
strcat(mac_address,":");
}
if(strlen(mac_digit[index_temp])<2)
{
strcat(mac_address,"0");
strcat(mac_address,mac_digit[index_temp]);
}else{
strcat(mac_address,mac_digit[index_temp]);
}
//printf("Temp : %s -> taille : %d index_temp : %d\n", mac_address,strlen(mac_address),index_temp);
index_temp++;
}
//printf("Fin dela boucle while\n");
return mac_address;
}
int main(int argc, char **argv)
{
pcap_t *desc;
pcap_t *desc_save;
struct pcap_pkthdr hdr;
struct bpf_program bp ;
struct ethhdr *EtherHdr;
struct ip *IpHeader;
struct tpchdr *TcpHeader;
bpf_u_int32 netmask=32;
FILE *fp;
const u_char *packet;
char **temp;
char errbuf[PCAP_ERRBUF_SIZE];
char * buff =NULL;
char *save_temp;
char *fichier_pcap = argv[1];
char mac_address_src_1[20];
char mac_address_dst_1[20];
char mac_address_src_2[20];
char mac_address_dst_2[20];
char previous_mac_address[20];
char mac_AP[20];
char ip_address_src_1[20];
char ip_address_dst_1[20];
char ip_address_src_2[20];
char ip_address_dst_2[20];
char directory[100];
int index_temp= 0;
int num_protocole= 0;
int mac_found= 0;
int host_found = 0;
int i = 0;
int size_tab=100;
int multiple_ip = 0;
//End of variables declaration
if(argc<=0){
fprintf(stderr,"Missing arguments");
exit(EXIT_FAILURE);
}
// We take the directory in wich we will write te ip/mac file
desc = pcap_open_offline(fichier_pcap, errbuf);
if (desc == NULL){
printf("File damaged or missing\n", errbuf), exit(2);
}
IpHeader=NULL;
// On rehcerhce l'adresse Mac et l'adresse IP du PA .
while(packet=pcap_next(desc,&hdr))
{
EtherHdr= (struct etherhdr *)packet;
if(EtherHdr->h_proto!=ETH_P_IP){ //if we are not using an ARP packet
//printf("EtherHdr proto : %d\n",ETH_HLEN);
IpHeader = (struct ip *)(packet + ETH_HLEN);
//printf("protocole IP : %d\n", IpHeader->ip_p);
if(IpHeader->ip_p ==IPPROTO_TCP){
printf("taille de la trame IP : %d\n", ETH_HLEN);
TcpHeader = (struct tcphdr *)(packet + 34); //IpHeader->ip_hl*4 in order to have the lenght in bytes
printf("Numéro du port : %x\n",ntohs(TcpHeader->source));
}
}
}
pcap_close(desc); //on ferme le fichier
return 0;
} |
Création d'un reconstructeur de page web depuis un fichier pcap
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Envoyé par danathane
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