Too many arguments using snprintf in BPF program

I included the linux kernel version of `snprintf` from `linux/kernel.h`.
This is the problematic code line:
```
char key[HASH_KEY_SIZE] = { 0 };
int size = snprintf(key, sizeof(key), "%08x%08x%04x%04x", s->src_ip, s->dst_ip, s->src_port, s->dst_port);
```

And this is the error I get:
```
error: :0:0: in function octarine_ids i32 (%struct.xdp_md*): too many args to 0x3ce1fd0: i64 = GlobalAddress 0
```

Start with the BPF program containing the shown snprintf call and review the linux/kernel.h declaration alongside the compiler diagnostic. Determine the supported argument and formatting constraints for this program; done means the BPF program compiles without the reported “too many args” error.

Written by the indexing model from the issue text.