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#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <arpa/inet.h>
#include "libpacketdump.h"
DLLEXPORT void decode(int link_type UNUSED,const char *packet,unsigned len) {
libtrace_ospf_hello_v2_t *hello = (libtrace_ospf_hello_v2_t *)packet;
struct in_addr *neigh;
if (len < 4)
return;
printf(" OSPF Hello: Network Mask %s\n", inet_ntoa(hello->mask));
if (len < 6)
return;
printf(" OSPF Hello: Interval %u ", ntohs(hello->interval));
if (len < 7) {
printf("\n");
return;
}
printf("Options ");
if (hello->hello_options.e_bit)
printf("E ");
if (hello->hello_options.mc_bit)
printf("MC ");
if (hello->hello_options.np_bit)
printf("N/P ");
if (hello->hello_options.ea_bit)
printf("EA ");
if (hello->hello_options.dc_bit)
printf("DC ");
printf("\n");
if (len < 8)
return;
printf(" OSPF Hello: Priority %u ", hello->priority);
if (len < 12) {
printf("\n");
return;
}
printf("Dead Interval %u\n", ntohl(hello->deadint));
if (len < 16)
return;
printf(" OSPF Hello: Designated Router %s\n", inet_ntoa(hello->designated));
if (len < 20)
return;
printf(" OSPF Hello: Backup Designated Router %s\n", inet_ntoa(hello->backup));
neigh = (struct in_addr *)(packet + sizeof(libtrace_ospf_hello_v2_t));
len -= sizeof(libtrace_ospf_hello_v2_t);
while (len >= 4) {
printf(" OSPF Hello: Neighbour %s\n", inet_ntoa(*neigh));
neigh++;
len -= sizeof(struct in_addr);
}
return;
}
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