gbucchino/dns-trace
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geoffrey 2025-02-05 20:02:34 +01:00
parent 6aa4b64a5a
commit 0872e2a6a7
5 changed files with 4 additions and 149988 deletions
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dns-trace
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4
exec.sh
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@ -1,6 +1,6 @@
#!/usr/bin/sh #!/usr/bin/sh
sudo bpftool btf dump file /sys/kernel/btf/vmlinux format c > src/vmlinux.h #sudo bpftool btf dump file /sys/kernel/btf/vmlinux format c > src/vmlinux.h
make clean make clean
make all && sudo ./dns-trace -i enx98e743c667fc make all && sudo ./dns-trace -i wlp0s20f3

3
src/dns-trace.c
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@ -313,7 +313,7 @@ int handle_event(void *ctx, void *data, size_t data_sz){
if (type == 5) { // -> CNAME if (type == 5) { // -> CNAME
char cname[size]; char cname[size];
get_labels(s_event->buf + pos, cname); get_labels(s_event->buf + pos, cname);
printf("%s ", cname); printf("%s %d ", cname, ttl);
} }
if (type == 28){ // -> AAAA if (type == 28){ // -> AAAA
int p = 0; int p = 0;
@ -327,6 +327,7 @@ int handle_event(void *ctx, void *data, size_t data_sz){
printf("%x", s_event->buf[pos + p++]); printf("%x", s_event->buf[pos + p++]);
} }
} }
printf(" %d ", ttl);
} }
pos += size; pos += size;
printf("\n"); printf("\n");

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src/dns-trace.ebpf.o
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149985
src/vmlinux.h
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