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Diffstat (limited to 'bpfc.c')
-rw-r--r--bpfc.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/bpfc.c b/bpfc.c
index cd88d66..e8482fa 100644
--- a/bpfc.c
+++ b/bpfc.c
@@ -17,10 +17,11 @@
#include "die.h"
#include "bpf.h"
-static const char *short_options = "vhi:Vdbf:";
+static const char *short_options = "vhi:Vdbf:p";
static const struct option long_options[] = {
{"input", required_argument, NULL, 'i'},
{"format", required_argument, NULL, 'f'},
+ {"cpp", no_argument, NULL, 'p'},
{"verbose", no_argument, NULL, 'V'},
{"bypass", no_argument, NULL, 'b'},
{"dump", no_argument, NULL, 'd'},
@@ -29,7 +30,7 @@ static const struct option long_options[] = {
{NULL, 0, NULL, 0}
};
-extern int compile_filter(char *file, int verbose, int bypass, int format);
+extern int compile_filter(char *file, int verbose, int bypass, int format, bool invoke_cpp);
static void __noreturn help(void)
{
@@ -38,6 +39,7 @@ static void __noreturn help(void)
"Usage: bpfc [options] || bpfc <program>\n"
"Options:\n"
" -i|--input <program/-> Berkeley Packet Filter file/stdin\n"
+ " -p|--cpp Run bpf program through C preprocessor\n"
" -f|--format <format> Output format: C|netsniff-ng|xt_bpf|tcpdump\n"
" -b|--bypass Bypass filter validation (e.g. for bug testing)\n"
" -V|--verbose Be more verbose\n"
@@ -48,7 +50,7 @@ static void __noreturn help(void)
" bpfc fubar\n"
" bpfc fubar > foo (bpfc -f C -i fubar > foo) --> netsniff-ng -f foo ...\n"
" bpfc -f tcpdump -i fubar > foo --> tcpdump -ddd like ...\n"
- " bpfc -f xt_bpf -b -i fubar\n"
+ " bpfc -f xt_bpf -b -p -i fubar\n"
" iptables -A INPUT -m bpf --bytecode \"`./bpfc -f xt_bpf -i fubar`\" -j LOG\n"
" bpfc - (read from stdin)\n\n"
"Please report bugs to <bugs@netsniff-ng.org>\n"
@@ -76,6 +78,7 @@ static void __noreturn version(void)
int main(int argc, char **argv)
{
int ret, verbose = 0, c, opt_index, bypass = 0, format = 0;
+ bool invoke_cpp = false;
char *file = NULL;
setfsuid(getuid());
@@ -96,6 +99,9 @@ int main(int argc, char **argv)
case 'V':
verbose = 1;
break;
+ case 'p':
+ invoke_cpp = true;
+ break;
case 'f':
if (!strncmp(optarg, "C", 1) ||
!strncmp(optarg, "netsniff-ng", 11))
@@ -137,7 +143,7 @@ int main(int argc, char **argv)
if (!file)
panic("No Berkeley Packet Filter program specified!\n");
- ret = compile_filter(file, verbose, bypass, format);
+ ret = compile_filter(file, verbose, bypass, format, invoke_cpp);
xfree(file);
return ret;