aiden
/
suricata
mirror of https://github.com/OISF/suricata
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ac-gfbs update. Minor improvement of compression for state 0. Improves performance

Browse Source
remotes/origin/master-1.2.x
Anoop Saldanha 13 years ago committed by Victor Julien
parent c6cd59bda4
commit 153f2ad3eb
1 changed files with 18 additions and 10 deletions
Show Stats Download Patch File Download Diff File

28
src/util-mpm-ac-gfbs.c
Unescape Escape View File

@ -754,7 +754,7 @@ static inline void SCACGfbsCreateModGotoTable(MpmCtx *mpm_ctx)
* alignment. Technically 8 bits is all we need to store ascii codes,
* but by avoiding it, we save a lot of time on handling alignment */
int size = (ctx->state_count * sizeof(SC_AC_GFBS_STATE_TYPE_U16) * 4 +
256 * sizeof(SC_AC_GFBS_STATE_TYPE_U16) * 2);
256 * sizeof(SC_AC_GFBS_STATE_TYPE_U16) * 1);
ctx->goto_table_mod = SCMalloc(size);
if (ctx->goto_table_mod == NULL) {
SCLogError(SC_ERR_MEM_ALLOC, "Error allocating memory");
@ -802,7 +802,8 @@ static inline void SCACGfbsCreateModGotoTable(MpmCtx *mpm_ctx)
* store the acii codes as well the corresponding states */
if (k > 0) {
no_of_entries[0] = k;
curr_loc += k;
if (state != 0)
curr_loc += k;
memcpy(curr_loc, temp_states, k * sizeof(SC_AC_GFBS_STATE_TYPE_U16));
curr_loc += k;
}
@ -815,7 +816,7 @@ static inline void SCACGfbsCreateModGotoTable(MpmCtx *mpm_ctx)
* alignment. Technically 8 bits is all we need to store ascii codes,
* but by avoiding it, we save a lot of time on handling alignment */
int size = (ctx->state_count * (sizeof(SC_AC_GFBS_STATE_TYPE_U32) * 4) +
256 * (sizeof(SC_AC_GFBS_STATE_TYPE_U32) * 2));
256 * (sizeof(SC_AC_GFBS_STATE_TYPE_U32) * 1));
ctx->goto_table_mod = SCMalloc(size);
if (ctx->goto_table_mod == NULL) {
SCLogError(SC_ERR_MEM_ALLOC, "Error allocating memory");
@ -863,7 +864,8 @@ static inline void SCACGfbsCreateModGotoTable(MpmCtx *mpm_ctx)
* store the acii codes as well the corresponding states */
if (k > 0) {
no_of_entries[0] = k;
curr_loc += k;
if (state != 0)
curr_loc += k;
memcpy(curr_loc, temp_states, k * sizeof(SC_AC_GFBS_STATE_TYPE_U32));
curr_loc += k;
}
@ -893,7 +895,10 @@ static inline void SCACGfbsClubOutputStatePresenceWithModGotoTable(MpmCtx *mpm_c
*((uint16_t *)ctx->goto_table_mod_pointers[state] + 1) |= (1 << 15);
}
states = ((uint16_t *)ctx->goto_table_mod_pointers[state] + 2 + no_of_entries);
if (state == 0)
states = ((uint16_t *)ctx->goto_table_mod_pointers[state] + 2);
else
states = ((uint16_t *)ctx->goto_table_mod_pointers[state] + 2 + no_of_entries);
for (i = 0; i < no_of_entries; i++) {
if (states[i] == 0)
continue;
@ -913,7 +918,10 @@ static inline void SCACGfbsClubOutputStatePresenceWithModGotoTable(MpmCtx *mpm_c
*((uint32_t *)ctx->goto_table_mod_pointers[state] + 1) |= (1 << 24);
}
states = ((uint32_t *)ctx->goto_table_mod_pointers[state] + 2 + no_of_entries);
if (state == 0)
states = ((uint32_t *)ctx->goto_table_mod_pointers[state] + 2);
else
states = ((uint32_t *)ctx->goto_table_mod_pointers[state] + 2 + no_of_entries);
for (i = 0; i < no_of_entries; i++) {
if (states[i] == 0)
continue;
@ -1253,7 +1261,7 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
register int32_t state = 0;
for (i = 0; i < buflen; i++) {
if (state == 0) {
state = (goto_table_mod_pointers[0] + 258)[u8_tolower(buf[i])];
state = (goto_table_mod_pointers[0] + 2)[u8_tolower(buf[i])];
} else {
/* get the goto state transition */
@ -1312,7 +1320,7 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
ascii_codes = goto_table_mod_pointers[state & 0x7FFF] + 2;
buf_local = u8_tolower(buf[i]);
if (state == 0) {
temp_state = ((ascii_codes + no_of_entries))[buf_local];
temp_state = (ascii_codes)[buf_local];
} else {
int low = 0;
int high = no_of_entries;
@ -1386,7 +1394,7 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
register int32_t state = 0;
for (i = 0; i < buflen; i++) {
if (state == 0) {
state = (goto_table_mod_pointers[0] + 258)[u8_tolower(buf[i])];
state = (goto_table_mod_pointers[0] + 2)[u8_tolower(buf[i])];
} else {
/* get the goto state transition */
@ -1445,7 +1453,7 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
ascii_codes = goto_table_mod_pointers[state & 0x00FFFFFF] + 2;
buf_local = u8_tolower(buf[i]);
if (state == 0) {
temp_state = ((ascii_codes + no_of_entries))[buf_local];
temp_state = (ascii_codes)[buf_local];
} else {
int low = 0;
int high = no_of_entries;

Write Preview
Loading…
Cancel
Save