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Add payload displaying

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This commit is contained in:
Martin Duquesnoy 2011-06-22 19:29:25 +02:00
parent 36b3db1556
commit 4ef0264916
1 changed files with 20 additions and 1 deletions
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21
hftsniff.c
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@ -9,6 +9,7 @@
#include <unistd.h> #include <unistd.h>
#include <string.h> #include <string.h>
#include <limits.h> #include <limits.h>
#include <ctype.h>
#include <pcap.h> #include <pcap.h>
#include <sys/socket.h> #include <sys/socket.h>
@ -31,6 +32,14 @@
printf("( \e[1m%s\e[0m ) ", s); \ printf("( \e[1m%s\e[0m ) ", s); \
} while(/* CONSTCOND */ 0); } while(/* CONSTCOND */ 0);
#define DISP_PAYLOAD(p, l) \
do { \
int i = 0; \
for(; i < (l) && (p)++; ++i) \
if(isprint(*(p))) \
putchar((char)*(p)); \
} while(/* CONSTCOND */ 0);
#define BYE(s, er) \ #define BYE(s, er) \
do { \ do { \
fprintf(stderr, s": (%s)\n", er); \ fprintf(stderr, s": (%s)\n", er); \
@ -165,7 +174,8 @@ pkt_handle(unsigned char *args, const struct pcap_pkthdr *header, const unsigned
{ {
struct ethernet_header *eth; struct ethernet_header *eth;
struct ip_header *ip; struct ip_header *ip;
int len, plen, i = 0; const unsigned char *payload;
int len, plen, paylen, i = 0;
bool pfound = false; bool pfound = false;
/* Translate ethernet pkt */ /* Translate ethernet pkt */
@ -198,8 +208,17 @@ pkt_handle(unsigned char *args, const struct pcap_pkthdr *header, const unsigned
IP_SRCDEST(inet_ntoa(ip->ip_src), -1, /* src */ IP_SRCDEST(inet_ntoa(ip->ip_src), -1, /* src */
inet_ntoa(ip->ip_dst), -1); /* dest */ inet_ntoa(ip->ip_dst), -1); /* dest */
puts("\n");
return;
} }
/* Get / Display payload */
payload = (unsigned char*)(packet + ETHERNET_SIZE + len + plen);
if((paylen = ntohs(ip->ip_len) - (len + plen)) > 0)
DISP_PAYLOAD(payload, paylen);
puts("\n"); puts("\n");
return; return;