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Diffstat (limited to 'bpf_parser.y')
-rw-r--r--bpf_parser.y70
1 files changed, 58 insertions, 12 deletions
diff --git a/bpf_parser.y b/bpf_parser.y
index 4c35e07..7f6bcc8 100644
--- a/bpf_parser.y
+++ b/bpf_parser.y
@@ -25,7 +25,7 @@
#define MAX_INSTRUCTIONS 4096
-int compile_filter(char *file, int verbose, int bypass, int decimal);
+int compile_filter(char *file, int verbose, int bypass, int format);
static int curr_instr = 0;
@@ -597,7 +597,60 @@ static void stage_2_label_reduce(void)
}
}
-int compile_filter(char *file, int verbose, int bypass, int decimal)
+static void pretty_printer_c(const struct sock_fprog *prog)
+{
+ int i;
+
+ for (i = 0; i < prog->len; ++i) {
+ printf("{ 0x%x, %u, %u, 0x%08x },\n",
+ prog->filter[i].code, prog->filter[i].jt,
+ prog->filter[i].jf, prog->filter[i].k);
+ }
+}
+
+static void pretty_printer_xt_bpf(const struct sock_fprog *prog)
+{
+ int i;
+
+ printf("%d,", prog->len);
+ for (i = 0; i < prog->len; ++i) {
+ printf("%u %u %u %u,",
+ prog->filter[i].code, prog->filter[i].jt,
+ prog->filter[i].jf, prog->filter[i].k);
+ }
+
+ fflush(stdout);
+}
+
+static void pretty_printer_tcpdump(const struct sock_fprog *prog)
+{
+ int i;
+
+ for (i = 0; i < prog->len; ++i) {
+ printf("%u %u %u %u\n",
+ prog->filter[i].code, prog->filter[i].jt,
+ prog->filter[i].jf, prog->filter[i].k);
+ }
+}
+
+static void pretty_printer(const struct sock_fprog *prog, int format)
+{
+ switch (format) {
+ case 0:
+ pretty_printer_c(prog);
+ break;
+ case 1:
+ pretty_printer_xt_bpf(prog);
+ break;
+ case 2:
+ pretty_printer_tcpdump(prog);
+ break;
+ default:
+ bug();
+ }
+}
+
+int compile_filter(char *file, int verbose, int bypass, int format)
{
int i;
struct sock_fprog res;
@@ -645,17 +698,10 @@ int compile_filter(char *file, int verbose, int bypass, int decimal)
if (verbose)
printf("Result:\n");
- for (i = 0; i < res.len; ++i) {
- if (decimal) {
- printf("%u %u %u %u\n",
- res.filter[i].code, res.filter[i].jt,
- res.filter[i].jf, res.filter[i].k);
- } else {
- printf("{ 0x%x, %u, %u, 0x%08x },\n",
- res.filter[i].code, res.filter[i].jt,
- res.filter[i].jf, res.filter[i].k);
- }
+ pretty_printer(&res, format);
+
+ for (i = 0; i < res.len; ++i) {
free(labels[i]);
free(labels_jt[i]);
free(labels_jf[i]);