diff options
Diffstat (limited to 'example')
-rw-r--r-- | example/ndpiReader.c | 2 | ||||
-rw-r--r-- | example/reader_util.c | 49 | ||||
-rw-r--r-- | example/reader_util.h | 1 |
3 files changed, 1 insertions, 51 deletions
diff --git a/example/ndpiReader.c b/example/ndpiReader.c index 925592de9..72e27baa7 100644 --- a/example/ndpiReader.c +++ b/example/ndpiReader.c @@ -4034,7 +4034,7 @@ static void ndpi_process_packet(u_char *args, trailer->master_protocol = htons(p.master_protocol), trailer->app_protocol = htons(p.app_protocol); ndpi_protocol2name(ndpi_thread_info[thread_id].workflow->ndpi_struct, p, trailer->name, sizeof(trailer->name)); crc = (uint32_t*)&extcap_buf[h.caplen+sizeof(struct ndpi_packet_trailer)]; - *crc = ethernet_crc32((const void*)extcap_buf, h.caplen+sizeof(struct ndpi_packet_trailer)); + *crc = ndpi_crc32((const void*)extcap_buf, h.caplen+sizeof(struct ndpi_packet_trailer)); h.caplen += delta, h.len += delta; #ifdef DEBUG_TRACE diff --git a/example/reader_util.c b/example/reader_util.c index 62fa3046a..b1f72c650 100644 --- a/example/reader_util.c +++ b/example/reader_util.c @@ -2253,55 +2253,6 @@ struct ndpi_proto ndpi_workflow_process_packet(struct ndpi_workflow * workflow, flow_risk)); } -/* ********************************************************** */ -/* http://home.thep.lu.se/~bjorn/crc/crc32_fast.c */ -/* ********************************************************** */ - -static uint32_t crc32_for_byte(uint32_t r) { - int j; - for(j = 0; j < 8; ++j) - r = ((r & 1) ? 0 : (uint32_t)0xEDB88320L) ^ r >> 1; - return r ^ (uint32_t)0xFF000000L; -} - -/* Any unsigned integer type with at least 32 bits may be used as - * accumulator type for fast crc32-calulation, but unsigned long is - * probably the optimal choice for most systems. */ -typedef unsigned long accum_t; - -static void init_tables(uint32_t* table, uint32_t* wtable) { - size_t i, j, k, w; - for(i = 0; i < 0x100; ++i) - table[i] = crc32_for_byte(i); - for(k = 0; k < sizeof(accum_t); ++k) - for(i = 0; i < 0x100; ++i) { - for(j = w = 0; j < sizeof(accum_t); ++j) - w = table[(uint8_t)(j == k? w ^ i: w)] ^ w >> 8; - wtable[(k << 8) + i] = w ^ (k? wtable[0]: 0); - } -} - -static void __crc32(const void* data, size_t n_bytes, uint32_t* crc) { - static uint32_t table[0x100], wtable[0x100*sizeof(accum_t)]; - size_t n_accum = n_bytes/sizeof(accum_t); - size_t i, j; - if(!*table) - init_tables(table, wtable); - for(i = 0; i < n_accum; ++i) { - accum_t a = *crc ^ ((accum_t*)data)[i]; - for(j = *crc = 0; j < sizeof(accum_t); ++j) - *crc ^= wtable[(j << 8) + (uint8_t)(a >> 8*j)]; - } - for(i = n_accum*sizeof(accum_t); i < n_bytes; ++i) - *crc = table[(uint8_t)*crc ^ ((uint8_t*)data)[i]] ^ *crc >> 8; -} - -u_int32_t ethernet_crc32(const void* data, size_t n_bytes) { - u_int32_t crc = 0; - __crc32(data, n_bytes, &crc); - return crc; -} - /* *********************************************** */ #ifdef USE_DPDK diff --git a/example/reader_util.h b/example/reader_util.h index b8b249afe..6f8e8ba20 100644 --- a/example/reader_util.h +++ b/example/reader_util.h @@ -392,7 +392,6 @@ int ndpi_is_datalink_supported(int datalink_type); /* compare two nodes in workflow */ int ndpi_workflow_node_cmp(const void *a, const void *b); void process_ndpi_collected_info(struct ndpi_workflow * workflow, struct ndpi_flow_info *flow); -u_int32_t ethernet_crc32(const void* data, size_t n_bytes); void ndpi_flow_info_free_data(struct ndpi_flow_info *flow); void ndpi_flow_info_freer(void *node); const char* print_cipher_id(u_int32_t cipher); |