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#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include "libpacketdump.h"
#ifndef WIN32
#include <netinet/in_systm.h>
#endif
#include <arpa/inet.h>
#include <netdb.h>
#define DISPLAY_EXP(x,fmt,exp) \
if ((unsigned int)len>=((char*)&ip->x-(char*)ip+sizeof(ip->x))) \
printf(fmt,exp); \
else \
return;
#define DISPLAY(x,fmt) DISPLAY_EXP(x,fmt,ip->x)
#define DISPLAYS(x,fmt) DISPLAY_EXP(x,fmt,htons(ip->x))
#define DISPLAYIP(x,fmt) DISPLAY_EXP(x,fmt,inet_ntoa(*(struct in_addr*)&ip->x))
DLLEXPORT void decode(int link_type UNUSED,const char *packet,unsigned len)
{
libtrace_ip_t *ip = (libtrace_ip_t*)packet;
if (len>=1) {
printf(" IP: Header Len %i",ip->ip_hl*4);
printf(" Ver %i",ip->ip_v);
}
//DISPLAY(ip_tos," TOS %02x")
DISPLAY_EXP(ip_tos," DSCP %02x",ip->ip_tos >> 2)
DISPLAY_EXP(ip_tos," ECN %x",ip->ip_tos & 0x2)
DISPLAYS(ip_len," Total Length %i")
printf("\n IP:");
DISPLAYS(ip_id," Id %u");
if ((unsigned int)len >= ((char *)&ip->ip_ttl - (char *)ip - 2)) {
printf(" Fragoff %i", ntohs(ip->ip_off) & 0x1FFF);
if (ntohs(ip->ip_off) & 0x2000) printf(" MORE_FRAG");
if (ntohs(ip->ip_off) & 0x4000) printf(" DONT_FRAG");
if (ntohs(ip->ip_off) & 0x8000) printf(" RESV_FRAG");
}
//printf("\n IP:");
DISPLAY(ip_ttl,"\n IP: TTL %i");
if ((unsigned int)len>=((char*)&ip->ip_p-(char*)ip+sizeof(ip->ip_p))) {
struct protoent *ent=getprotobynumber(ip->ip_p);
if (ent) {
printf(" Proto %i (%s)",ip->ip_p,ent->p_name);
}
else {
printf(" Proto %i",ip->ip_p);
}
} else {
printf("\n");
return;
}
DISPLAYS(ip_sum," Checksum %i\n");
DISPLAYIP(ip_src," IP: Source %s ");
DISPLAYIP(ip_dst,"Destination %s\n");
decode_next(packet+ip->ip_hl*4,len-ip->ip_hl*4,"ip",ip->ip_p);
return;
}
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