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-rw-r--r--src/lib/du_buff.c380
1 files changed, 0 insertions, 380 deletions
diff --git a/src/lib/du_buff.c b/src/lib/du_buff.c
deleted file mode 100644
index 5f9d6f28..00000000
--- a/src/lib/du_buff.c
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016
- *
- * Data Unit Buffer
- *
- * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
- * Sander Vrijders <sander.vrijders@intec.ugent.be>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-#include <ouroboros/du_buff.h>
-#include <ouroboros/list.h>
-
-#define OUROBOROS_PREFIX "du_buff"
-
-#include "ouroboros/logs.h"
-
-#define DU_BLOCK_DATA_SIZE (DU_BUFF_BLOCK_SIZE - sizeof (struct buffer))
-
-struct buffer {
- uint8_t * data;
- size_t size;
- struct list_head list;
-};
-
-struct du_buff {
- struct buffer * buffer;
- size_t size;
- size_t du_head;
- size_t du_tail;
-};
-
-static void buffer_destroy(struct buffer * buf)
-{
- if (buf == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return;
- }
-
- free (buf->data);
- free (buf);
-}
-
-static void buffer_destroy_list(struct buffer * head)
-{
- struct list_head * ptr;
- struct list_head * n;
-
- if (head == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return;
- }
-
- list_for_each_safe(ptr, n, &(head->list)) {
- struct buffer * tmp = list_entry(ptr, struct buffer, list);
- list_del(ptr);
- buffer_destroy(tmp);
- }
- free(head);
-}
-
-static struct buffer * buffer_create (size_t size, size_t headspace, size_t len)
-{
- struct buffer * head = NULL;
- size_t remaining = size;
- size_t ts = size - (headspace + len);
-
- if (headspace > DU_BLOCK_DATA_SIZE || ts > DU_BLOCK_DATA_SIZE) {
- LOG_ERR("Illegal du_buff: Cannot fit PCI in DU_BUFF_BLOCK.");
- return NULL;
- }
-
- head = malloc(sizeof *head);
- if (head == NULL)
- return NULL;
-
- head->size = 0;
- head->data = NULL;
-
- INIT_LIST_HEAD(&(head->list));
-
- while (remaining > 0) {
- struct buffer * buf;
-
- size_t sz;
-
- if (size > DU_BLOCK_DATA_SIZE
- && remaining - ts <= DU_BLOCK_DATA_SIZE
- && remaining != ts) {
- sz = remaining - ts;
- } else if (size > DU_BLOCK_DATA_SIZE && remaining == ts) {
- sz = ts;
- } else {
- sz = remaining < DU_BLOCK_DATA_SIZE ?
- remaining : DU_BLOCK_DATA_SIZE;
- }
-
- buf = malloc(sizeof *buf);
- if (buf == NULL) {
- LOG_WARN("Could not allocate struct.");
- free(head);
- return NULL;
- }
-
- if (sz > 0) {
- buf->data = malloc(sz);
- if (buf->data == NULL) {
- LOG_WARN("Could not allocate memory block.");
- buffer_destroy_list(head);
- free(head);
- free(buf);
- return NULL;
- }
- } else {
- buf->data = NULL;
- }
-
- buf->size = sz;
-
- list_add_tail(&(buf->list), &(head->list));
-
- remaining -= buf->size;
- }
-
- return head;
-}
-
-static struct buffer * buffer_seek(const struct buffer * head, size_t pos)
-{
- struct list_head * ptr = NULL;
- size_t cur_buf_start = 0;
- size_t cur_buf_end = 0;
-
- if (head == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return NULL;
- }
-
- list_for_each(ptr, &(head->list)) {
- struct buffer * tmp = list_entry(ptr, struct buffer, list);
-
- cur_buf_end = cur_buf_start + tmp->size;
- if (cur_buf_end > pos)
- return tmp;
-
- cur_buf_start = cur_buf_end;
- }
-
- return NULL;
-}
-
-static uint8_t * buffer_seek_pos(const struct buffer * head, size_t pos)
-{
- struct list_head * ptr = NULL;
- size_t cur_buf_start = 0;
- size_t cur_buf_end = 0;
-
- if (head == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return NULL;
- }
-
- list_for_each(ptr, &(head->list)) {
- struct buffer * tmp = list_entry(ptr, struct buffer, list);
-
- cur_buf_end = cur_buf_start + tmp->size;
-
- if (cur_buf_end > pos)
- return tmp->data + (pos - cur_buf_start);
-
- cur_buf_start = cur_buf_end;
- }
-
- return NULL;
-}
-
-static int buffer_copy_data(struct buffer * head,
- size_t pos,
- const void * src,
- size_t len)
-{
- struct list_head * ptr = NULL;
- struct buffer * buf_start = NULL;
- struct buffer * buf_end = NULL;
- uint8_t * ptr_start = NULL;
- size_t space_in_buf;
- size_t bytes_remaining;
- uint8_t * copy_pos = NULL;
-
- if (head == NULL || src == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return -EINVAL;
- }
-
- if (len == 0) {
- LOG_DBGF("Nothing to copy.");
- return 0;
- }
-
- buf_start = buffer_seek(head, pos);
- buf_end = buffer_seek(head, pos + len - 1);
-
- if (buf_start == NULL || buf_end == NULL) {
- LOG_DBGF("Index out of bounds %lu, %lu", pos, pos + len);
- return -EINVAL;
- }
-
- ptr_start = buffer_seek_pos(head, pos);
-
- if (buf_start == buf_end) {
- memcpy(ptr_start, src, len);
- return 0;
- }
-
- copy_pos = (uint8_t *)src;
- bytes_remaining = len;
- list_for_each(ptr, &(head->list)) {
- struct buffer * tmp = list_entry(ptr, struct buffer, list);
- if (tmp != buf_start)
- continue;
-
- space_in_buf = (tmp->data + tmp->size) - ptr_start;
- if (space_in_buf >= bytes_remaining) {
- memcpy(ptr_start, copy_pos, bytes_remaining);
- return 0;
- }
- else
- memcpy(ptr_start, copy_pos, space_in_buf);
- bytes_remaining -= space_in_buf;
- copy_pos += space_in_buf;
- }
-
- return 0;
-}
-
-du_buff_t * du_buff_create(size_t size)
-{
- du_buff_t * dub = malloc(sizeof *dub);
-
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return NULL;
- }
-
- dub->buffer = NULL;
- dub->size = size;
- dub->du_head = 0;
- dub->du_tail = 0;
-
- return dub;
-}
-
-void du_buff_destroy(du_buff_t * dub)
-{
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return;
- }
- buffer_destroy_list(dub->buffer);
- free (dub);
-}
-
-int du_buff_init(du_buff_t * dub,
- size_t start,
- uint8_t * data,
- size_t len)
-{
- if (dub == NULL || data == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return -EINVAL;
- }
-
- if (start >= dub->size) {
- LOG_DBGF("Index out of bounds %lu.", start);
- return -EINVAL;
- }
-
- if (start + len > dub->size) {
- LOG_DBGF("Buffer too small for data.");
- return -EINVAL;
- }
-
- dub->buffer = buffer_create(dub->size, start, len);
- if (dub->buffer == NULL)
- return -ENOMEM;
-
- dub->du_head = start;
- dub->du_tail = start + len;
-
- return buffer_copy_data(dub->buffer, start, data, len);
-}
-
-uint8_t * du_buff_head_alloc(du_buff_t * dub, size_t size)
-{
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return NULL;
- }
-
- if ((long) (dub->du_head - size) < 0) {
- LOG_WARN("Failed to allocate PCI headspace.");
- return NULL;
- }
-
- dub->du_head -= size;
-
- return (buffer_seek_pos(dub->buffer, dub->du_head));
-}
-
-uint8_t * du_buff_tail_alloc(du_buff_t * dub, size_t size)
-{
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return NULL;
- }
-
- if (dub->du_tail + size >= dub->size) {
- LOG_WARN("Failed to allocate PCI tailspace.");
- return NULL;
- }
-
- dub->du_tail += size;
-
- return (buffer_seek_pos(dub->buffer, dub->du_tail));
-}
-
-int du_buff_head_release(du_buff_t * dub, size_t size)
-{
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return -EINVAL;
- }
-
- if (size > dub->du_tail - dub->du_head) {
- LOG_WARN("Tried to release beyond sdu boundary.");
- return -EOVERFLOW;
- }
-
- dub->du_head += size;
-
- /* FIXME: copy some random crap to the buffer for security */
-
- return 0;
-}
-
-int du_buff_tail_release(du_buff_t * dub, size_t size)
-{
- if (dub == NULL) {
- LOG_DBGF("Bogus input, bugging out.");
- return -EINVAL;
- }
-
- if (size > dub->du_tail - dub->du_head) {
- LOG_WARN("Tried to release beyond sdu boundary.");
- return -EOVERFLOW;
- }
-
- dub->du_tail -= size;
-
- /* FIXME: copy some random crap to the buffer for security */
-
- return 0;
-}
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