mrx6s0
(usa Ubuntu)
Enviado em 23/06/2016 - 14:35h
então, velho, tenho esse programa aqui, mas me retorna dois erros apenas, um é ''referência indefinida para pcap_lookupdev" e a outra é "referência indefinida para pcap_next".
O código é esse:
#include <stdio.h>
#include <stdlib.h>
#include <pcap.h> // or pcap/pcap.h //
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/if_ether.h> /* includes net/ethernet.h */
#include <ctime>
int main(int argc, char **argv)
{
int i;
char *dev;
char errbuf[PCAP_ERRBUF_SIZE];
pcap_t* descr;
const u_char *packet;
struct pcap_pkthdr hdr; /* pcap.h */
struct ether_header *eptr; /* net/ethernet.h */
struct iphdr *ipheader;
u_char *ptr; /* printing out hardware header info */
/* grab a device to peak into... */
while(1)
{
dev = pcap_lookupdev(errbuf);
if(dev == NULL)
{
printf("%s\n",errbuf);
exit(1);
}
printf("DEV: %s\n",dev);
/* open the device for sniffing.
pcap_t *pcap_open_live(char *device,int snaplen, int prmisc,int to_ms,
char *ebuf)
descr = pcap_open_live(dev,BUFSIZ,0,-1,errbuf);
if(descr == NULL)
{
printf("pcap_open_live(): %s\n",errbuf);
exit(1);
}
/*
grab a packet from descr
u_char *pcap_next(pcap_t *p,struct pcap_pkthdr *h)
so just pass in the descriptor we got from
our call to pcap_open_live and an allocated
struct pcap_pkthdr */
packet = pcap_next(descr,&hdr);
if(packet == NULL)
{/* dinna work *sob* */
printf("Didn't grab packet\n");
exit(1);
}
/* struct pcap_pkthdr {
struct timeval ts; time stamp
bpf_u_int32 caplen; length of portion present
bpf_u_int32; lebgth this packet (off wire)
}
*/
printf("Grabbed packet of length %d\n",hdr.len);
printf("Recieved at ..... %s\n", ctime((const time_t*)&hdr.ts.tv_sec));
printf("Ethernet address length is %d\n",ETHER_HDR_LEN);
/* lets start with the ether header... */
eptr = (struct ether_header *) packet;
/* Do a couple of checks to see what packet type we have..*/
if (ntohs (eptr->ether_type) == ETHERTYPE_IP)
{
printf("Ethernet type hex:%x dec:%d is an IP packet\n",
ntohs(eptr->ether_type),
ntohs(eptr->ether_type));
}else if (ntohs (eptr->ether_type) == ETHERTYPE_ARP)
{
printf("Ethernet type hex:%x dec:%d is an ARP packet\n",
ntohs(eptr->ether_type),
ntohs(eptr->ether_type));
}else {
printf("Ethernet type %x not IP", ntohs(eptr->ether_type));
exit(1);
}
ptr = eptr->ether_dhost;
i = ETHER_ADDR_LEN;
printf(" Destination Address: ");
do{
printf("%s%x",(i == ETHER_ADDR_LEN) ? " " : ":",*ptr++);
}while(--i>0);
printf("\n");
ptr = eptr->ether_shost;
i = ETHER_ADDR_LEN;
printf(" Source Address: ");
do{
printf("%s%x",(i == ETHER_ADDR_LEN) ? " " : ":",*ptr++);
}while(--i>0);
printf("\n");
}
return 0;
}
Se tiver como me ajudar agradeço! alguns outros eu consegui, mas esse não tá indo...
