diff options
Diffstat (limited to 'sys/net/bpf_jitter.c')
| -rw-r--r-- | sys/net/bpf_jitter.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/sys/net/bpf_jitter.c b/sys/net/bpf_jitter.c index 87a3ab3..d15bc93 100644 --- a/sys/net/bpf_jitter.c +++ b/sys/net/bpf_jitter.c @@ -50,6 +50,8 @@ __FBSDID("$FreeBSD$"); bpf_filter_func bpf_jit_compile(struct bpf_insn *, u_int, int *); +static u_int bpf_jit_accept_all(u_char *, u_int, u_int); + #ifdef _KERNEL MALLOC_DEFINE(M_BPFJIT, "BPF_JIT", "BPF JIT compiler"); @@ -69,6 +71,12 @@ bpf_jitter(struct bpf_insn *fp, int nins) if (filter == NULL) return (NULL); + /* No filter means accept all */ + if (fp == NULL || nins == 0) { + filter->func = bpf_jit_accept_all; + return (filter); + } + /* Create the binary */ if ((filter->func = bpf_jit_compile(fp, nins, filter->mem)) == NULL) { free(filter, M_BPFJIT); @@ -82,7 +90,8 @@ void bpf_destroy_jit_filter(bpf_jit_filter *filter) { - free(filter->func, M_BPFJIT); + if (filter->func != bpf_jit_accept_all) + free(filter->func, M_BPFJIT); free(filter, M_BPFJIT); } #else @@ -96,6 +105,12 @@ bpf_jitter(struct bpf_insn *fp, int nins) if (filter == NULL) return (NULL); + /* No filter means accept all */ + if (fp == NULL || nins == 0) { + filter->func = bpf_jit_accept_all; + return (filter); + } + /* Create the binary */ if ((filter->func = bpf_jit_compile(fp, nins, filter->mem)) == NULL) { free(filter); @@ -109,7 +124,16 @@ void bpf_destroy_jit_filter(bpf_jit_filter *filter) { - free(filter->func); + if (filter->func != bpf_jit_accept_all) + free(filter->func); free(filter); } #endif + +static u_int +bpf_jit_accept_all(__unused u_char *p, __unused u_int wirelen, + __unused u_int buflen) +{ + + return ((u_int)-1); +} |
