Open Regressor opened 1 year ago
Solved it for myself adding some dirty code:
if(lltype == DLT_EN10MB) {
eth = (struct ether_header*)packet;
if(ntohs(eth->ether_type) != ETHERTYPE_IP && ntohs(eth->ether_type) != ETHERTYPE_IPV6 && ntohs(eth->ether_type) != ETHERTYPE_VLAN) {
return;
}
int tag_size = 0;
if (ntohs(eth->ether_type) == ETHERTYPE_VLAN) {
tag_size = 4;
}
ip = (struct ip*)(packet + sizeof(struct ether_header) + tag_size);
ip6 = (struct ip6_hdr*)(packet + sizeof(struct ether_header) + tag_size);
int tag_size = 0;
if (ntohs(eth->ether_type) == ETHERTYPE_VLAN) {
tag_size = 4;
}
ip = (struct ip*)(packet + sizeof(struct ether_header) + tag_size);
ip6 = (struct ip6_hdr*)(packet + sizeof(struct ether_header) + tag_size);
Hi. I have a vps with ubuntu 22. I installed knockd using apt and can't get it working
I started it with debug and copied filter string. Then I started tcpdump with that string and got knocking packets. knockd just prints listening on eth0 and nothing happens.
I downloaded sources from git added some debug prints and compiled them. Sniff triggered on incoming packets but exits at line 1639:
I added debug print and got ntohs(eth->ether_type) == ETHERTYPE_VLAN (0x8100)
There is no any vlan config in linux so I just can't disable it
Is there any way to get it working ?